decouple block open flags from fmode_t

decouple block open flags from fmode_t

[Christoph Hellwig]

Hi all,

this series adds a new blk_mode_t for block open flags instead of abusing
fmode_t.  The block open flags work very different from the normal use of
fmode_t and only share the basic READ/WRITE flags with it.  None of the
other normal FMODE_* flags is used, but instead there are three
block-specific ones not used by anyone else, which can now be removed.

Note that I've only CCed maintainers and lists for drivers and file systems
that have non-trivial changes, as otherwise the series would spam literally
everyone in the block and file system world.

Diffstat:
 arch/um/drivers/ubd_kern.c          |   20 ++-----
 arch/xtensa/platforms/iss/simdisk.c |    6 +-
 block/bdev.c                        |   99 ++++++++++++++++++------------------
 block/blk-zoned.c                   |   12 ++--
 block/blk.h                         |   26 ++++++++-
 block/bsg-lib.c                     |    2 
 block/bsg.c                         |    8 +-
 block/disk-events.c                 |   47 +++++++----------
 block/fops.c                        |   54 ++++++++++++-------
 block/genhd.c                       |   13 ++--
 block/ioctl.c                       |   61 +++++++---------------
 drivers/block/amiflop.c             |   20 +++----
 drivers/block/aoe/aoeblk.c          |    8 +-
 drivers/block/ataflop.c             |   43 +++++++--------
 drivers/block/drbd/drbd_main.c      |   13 ++--
 drivers/block/drbd/drbd_nl.c        |   23 +++++---
 drivers/block/floppy.c              |   72 +++++++++++++-------------
 drivers/block/loop.c                |   24 ++++----
 drivers/block/mtip32xx/mtip32xx.c   |    4 -
 drivers/block/nbd.c                 |   12 ++--
 drivers/block/pktcdvd.c             |   36 ++++++-------
 drivers/block/rbd.c                 |    6 +-
 drivers/block/rnbd/rnbd-clt.c       |    8 +-
 drivers/block/rnbd/rnbd-srv-sysfs.c |    3 -
 drivers/block/rnbd/rnbd-srv.c       |   23 ++++----
 drivers/block/rnbd/rnbd-srv.h       |    2 
 drivers/block/sunvdc.c              |    2 
 drivers/block/swim.c                |   24 ++++----
 drivers/block/swim3.c               |   33 +++++-------
 drivers/block/ublk_drv.c            |    4 -
 drivers/block/xen-blkback/xenbus.c  |    4 -
 drivers/block/xen-blkfront.c        |    2 
 drivers/block/z2ram.c               |    8 +-
 drivers/block/zram/zram_drv.c       |   21 +++----
 drivers/cdrom/cdrom.c               |   36 +++----------
 drivers/cdrom/gdrom.c               |   12 ++--
 drivers/md/bcache/bcache.h          |    2 
 drivers/md/bcache/request.c         |    4 -
 drivers/md/bcache/super.c           |   25 ++++-----
 drivers/md/dm-cache-target.c        |   12 ++--
 drivers/md/dm-clone-target.c        |   10 +--
 drivers/md/dm-core.h                |    7 +-
 drivers/md/dm-era-target.c          |    6 +-
 drivers/md/dm-ioctl.c               |   10 +--
 drivers/md/dm-snap.c                |    4 -
 drivers/md/dm-table.c               |   11 ++--
 drivers/md/dm-thin.c                |    9 +--
 drivers/md/dm-verity-fec.c          |    2 
 drivers/md/dm-verity-target.c       |    6 +-
 drivers/md/dm.c                     |   20 +++----
 drivers/md/dm.h                     |    2 
 drivers/md/md.c                     |   50 +++++++++---------
 drivers/mmc/core/block.c            |   12 ++--
 drivers/mtd/devices/block2mtd.c     |    6 +-
 drivers/mtd/mtd_blkdevs.c           |    8 +-
 drivers/mtd/mtdblock.c              |    2 
 drivers/mtd/ubi/block.c             |    9 +--
 drivers/nvme/host/core.c            |    6 +-
 drivers/nvme/host/ioctl.c           |   66 +++++++++++++-----------
 drivers/nvme/host/multipath.c       |    6 +-
 drivers/nvme/host/nvme.h            |    4 -
 drivers/nvme/target/io-cmd-bdev.c   |    4 -
 drivers/s390/block/dasd.c           |   10 +--
 drivers/s390/block/dasd_genhd.c     |    5 +
 drivers/s390/block/dasd_int.h       |    3 -
 drivers/s390/block/dasd_ioctl.c     |    2 
 drivers/s390/block/dcssblk.c        |   11 +---
 drivers/scsi/ch.c                   |    3 -
 drivers/scsi/scsi_bsg.c             |    4 -
 drivers/scsi/scsi_ioctl.c           |   38 ++++++-------
 drivers/scsi/sd.c                   |   39 ++++++--------
 drivers/scsi/sg.c                   |    7 +-
 drivers/scsi/sr.c                   |   22 ++++----
 drivers/scsi/st.c                   |    2 
 drivers/target/target_core_iblock.c |    9 +--
 drivers/target/target_core_pscsi.c  |   10 +--
 fs/btrfs/dev-replace.c              |    6 +-
 fs/btrfs/ioctl.c                    |   12 ++--
 fs/btrfs/super.c                    |   21 ++-----
 fs/btrfs/volumes.c                  |   55 +++++++++-----------
 fs/btrfs/volumes.h                  |   11 +---
 fs/erofs/super.c                    |    7 +-
 fs/ext4/super.c                     |   11 +---
 fs/f2fs/super.c                     |   12 ++--
 fs/jfs/jfs_logmgr.c                 |    6 +-
 fs/nfs/blocklayout/dev.c            |    9 +--
 fs/nilfs2/super.c                   |   12 +---
 fs/ocfs2/cluster/heartbeat.c        |    7 +-
 fs/reiserfs/journal.c               |   19 +++---
 fs/reiserfs/reiserfs.h              |    1 
 fs/super.c                          |   33 ++++--------
 fs/xfs/xfs_super.c                  |   15 ++---
 include/linux/blkdev.h              |   68 +++++++++++-------------
 include/linux/bsg.h                 |    2 
 include/linux/cdrom.h               |   12 ++--
 include/linux/device-mapper.h       |    8 +-
 include/linux/fs.h                  |    8 --
 include/linux/mtd/blktrans.h        |    2 
 include/scsi/scsi_ioctl.h           |    4 -
 kernel/power/hibernate.c            |   12 +---
 kernel/power/power.h                |    2 
 kernel/power/swap.c                 |   28 ++++------
 mm/swapfile.c                       |    7 +-
 103 files changed, 796 insertions(+), 853 deletions(-)

[PATCH 01/31] block: also call ->open for incremental partition opens

[Christoph Hellwig]

For whole devices ->open is called for each open, but for partitions it
is only called on the first open of a partition.  This is problematic
as various block drivers look at open flags and might not do all setup
for ioctl only or NDELAY opens.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/bdev.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/block/bdev.c b/block/bdev.c
index 5c46ff10770638..981f6135795138 100644
--- a/block/bdev.c
+++ b/block/bdev.c
@@ -683,9 +683,6 @@ static int blkdev_get_part(struct block_device *part, fmode_t mode)
 	struct gendisk *disk = part->bd_disk;
 	int ret;
 
-	if (atomic_read(&part->bd_openers))
-		goto done;
-
 	ret = blkdev_get_whole(bdev_whole(part), mode);
 	if (ret)
 		return ret;
@@ -694,9 +691,10 @@ static int blkdev_get_part(struct block_device *part, fmode_t mode)
 	if (!bdev_nr_sectors(part))
 		goto out_blkdev_put;
 
-	disk->open_partitions++;
-	set_init_blocksize(part);
-done:
+	if (!atomic_read(&part->bd_openers)) {
+		disk->open_partitions++;
+		set_init_blocksize(part);
+	}
 	atomic_inc(&part->bd_openers);
 	return 0;
 
@@ -709,10 +707,10 @@ static void blkdev_put_part(struct block_device *part, fmode_t mode)
 {
 	struct block_device *whole = bdev_whole(part);
 
-	if (!atomic_dec_and_test(&part->bd_openers))
-		return;
-	blkdev_flush_mapping(part);
-	whole->bd_disk->open_partitions--;
+	if (atomic_dec_and_test(&part->bd_openers)) {
+		blkdev_flush_mapping(part);
+		whole->bd_disk->open_partitions--;
+	}
 	blkdev_put_whole(whole, mode);
 }
 
-- 
2.39.2

Re: [PATCH 01/31] block: also call ->open for incremental partition opens

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:20AM +0200, Christoph Hellwig wrote:
> For whole devices ->open is called for each open, but for partitions it
> is only called on the first open of a partition.  This is problematic
> as various block drivers look at open flags and might not do all setup
> for ioctl only or NDELAY opens.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

This assumes that all drivers deal with additional ->open() calls for
each partition correctly which I assumed you checked so,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 01/31] block: also call ->open for incremental partition opens

[Christoph Hellwig]

On Wed, Jun 07, 2023 at 10:14:22AM +0200, Christian Brauner wrote:
> This assumes that all drivers deal with additional ->open() calls for
> each partition correctly which I assumed you checked so,

They have to, because they already get the additional open for
extra opens of the whole device.  The current behavior is:

open("/dev/vdb", ...)
  ->open called

open("/dev/vdb", ...)
  ->open called

----

open("/dev/vdb", ...)
  ->open called

open("/dev/vdb1", ...)
  ->open called

----

open("/dev/vdb1", ...)
  ->open called

open("/dev/vdb1", ...)
  ->open NOT called

which is very inconsistent.

Re: [PATCH 01/31] block: also call ->open for incremental partition opens

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> For whole devices ->open is called for each open, but for partitions it
> is only called on the first open of a partition.  This is problematic
> as various block drivers look at open flags and might not do all setup
> for ioctl only or NDELAY opens.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   block/bdev.c | 18 ++++++++----------
>   1 file changed, 8 insertions(+), 10 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

[PATCH 02/31] cdrom: remove the unused bdev argument to cdrom_open

[Christoph Hellwig]

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/cdrom/cdrom.c | 3 +--
 drivers/cdrom/gdrom.c | 2 +-
 drivers/scsi/sr.c     | 2 +-
 include/linux/cdrom.h | 3 +--
 4 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index 416f723a2dbb33..e3eab319cb0474 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -1155,8 +1155,7 @@ int open_for_data(struct cdrom_device_info *cdi)
  * is in their own interest: device control becomes a lot easier
  * this way.
  */
-int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
-	       fmode_t mode)
+int cdrom_open(struct cdrom_device_info *cdi, fmode_t mode)
 {
 	int ret;
 
diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
index ceded5772aac6d..eaa2d5a90bc82f 100644
--- a/drivers/cdrom/gdrom.c
+++ b/drivers/cdrom/gdrom.c
@@ -481,7 +481,7 @@ static int gdrom_bdops_open(struct block_device *bdev, fmode_t mode)
 	bdev_check_media_change(bdev);
 
 	mutex_lock(&gdrom_mutex);
-	ret = cdrom_open(gd.cd_info, bdev, mode);
+	ret = cdrom_open(gd.cd_info, mode);
 	mutex_unlock(&gdrom_mutex);
 	return ret;
 }
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 12869e6d4ebda8..61b83880e395a4 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -498,7 +498,7 @@ static int sr_block_open(struct block_device *bdev, fmode_t mode)
 		sr_revalidate_disk(cd);
 
 	mutex_lock(&cd->lock);
-	ret = cdrom_open(&cd->cdi, bdev, mode);
+	ret = cdrom_open(&cd->cdi, mode);
 	mutex_unlock(&cd->lock);
 
 	scsi_autopm_put_device(sdev);
diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h
index 67caa909e3e615..cc5717cb0fa8a8 100644
--- a/include/linux/cdrom.h
+++ b/include/linux/cdrom.h
@@ -101,8 +101,7 @@ int cdrom_read_tocentry(struct cdrom_device_info *cdi,
 		struct cdrom_tocentry *entry);
 
 /* the general block_device operations structure: */
-extern int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
-			fmode_t mode);
+int cdrom_open(struct cdrom_device_info *cdi, fmode_t mode);
 extern void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode);
 extern int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
 		       fmode_t mode, unsigned int cmd, unsigned long arg);
-- 
2.39.2

Re: [PATCH 02/31] cdrom: remove the unused bdev argument to cdrom_open

[Phillip Potter]

On Tue, Jun 06, 2023 at 09:39:21AM +0200, Christoph Hellwig wrote:
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  drivers/cdrom/cdrom.c | 3 +--
>  drivers/cdrom/gdrom.c | 2 +-
>  drivers/scsi/sr.c     | 2 +-
>  include/linux/cdrom.h | 3 +--
>  4 files changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
> index 416f723a2dbb33..e3eab319cb0474 100644
> --- a/drivers/cdrom/cdrom.c
> +++ b/drivers/cdrom/cdrom.c
> @@ -1155,8 +1155,7 @@ int open_for_data(struct cdrom_device_info *cdi)
>   * is in their own interest: device control becomes a lot easier
>   * this way.
>   */
> -int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
> -	       fmode_t mode)
> +int cdrom_open(struct cdrom_device_info *cdi, fmode_t mode)
>  {
>  	int ret;
>  
> diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
> index ceded5772aac6d..eaa2d5a90bc82f 100644
> --- a/drivers/cdrom/gdrom.c
> +++ b/drivers/cdrom/gdrom.c
> @@ -481,7 +481,7 @@ static int gdrom_bdops_open(struct block_device *bdev, fmode_t mode)
>  	bdev_check_media_change(bdev);
>  
>  	mutex_lock(&gdrom_mutex);
> -	ret = cdrom_open(gd.cd_info, bdev, mode);
> +	ret = cdrom_open(gd.cd_info, mode);
>  	mutex_unlock(&gdrom_mutex);
>  	return ret;
>  }
> diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
> index 12869e6d4ebda8..61b83880e395a4 100644
> --- a/drivers/scsi/sr.c
> +++ b/drivers/scsi/sr.c
> @@ -498,7 +498,7 @@ static int sr_block_open(struct block_device *bdev, fmode_t mode)
>  		sr_revalidate_disk(cd);
>  
>  	mutex_lock(&cd->lock);
> -	ret = cdrom_open(&cd->cdi, bdev, mode);
> +	ret = cdrom_open(&cd->cdi, mode);
>  	mutex_unlock(&cd->lock);
>  
>  	scsi_autopm_put_device(sdev);
> diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h
> index 67caa909e3e615..cc5717cb0fa8a8 100644
> --- a/include/linux/cdrom.h
> +++ b/include/linux/cdrom.h
> @@ -101,8 +101,7 @@ int cdrom_read_tocentry(struct cdrom_device_info *cdi,
>  		struct cdrom_tocentry *entry);
>  
>  /* the general block_device operations structure: */
> -extern int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
> -			fmode_t mode);
> +int cdrom_open(struct cdrom_device_info *cdi, fmode_t mode);
>  extern void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode);
>  extern int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
>  		       fmode_t mode, unsigned int cmd, unsigned long arg);
> -- 
> 2.39.2
> 

Thanks for the patch, looks good to me.

Signed-off-by: Phillip Potter <phil@philpotter.co.uk>

Regards,
Phil

Re: [PATCH 02/31] cdrom: remove the unused bdev argument to cdrom_open

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:21AM +0200, Christoph Hellwig wrote:
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

lgtm,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 02/31] cdrom: remove the unused bdev argument to cdrom_open

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   drivers/cdrom/cdrom.c | 3 +--
>   drivers/cdrom/gdrom.c | 2 +-
>   drivers/scsi/sr.c     | 2 +-
>   include/linux/cdrom.h | 3 +--
>   4 files changed, 4 insertions(+), 6 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

[PATCH 03/31] cdrom: remove the unused mode argument to cdrom_ioctl

[Christoph Hellwig]

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/cdrom/cdrom.c | 2 +-
 drivers/cdrom/gdrom.c | 2 +-
 drivers/scsi/sr.c     | 2 +-
 include/linux/cdrom.h | 4 ++--
 4 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index e3eab319cb0474..245e5bbb05d41c 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -3336,7 +3336,7 @@ static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
  * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
  */
 int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
-		fmode_t mode, unsigned int cmd, unsigned long arg)
+		unsigned int cmd, unsigned long arg)
 {
 	void __user *argp = (void __user *)arg;
 	int ret;
diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
index eaa2d5a90bc82f..14922403983e9e 100644
--- a/drivers/cdrom/gdrom.c
+++ b/drivers/cdrom/gdrom.c
@@ -505,7 +505,7 @@ static int gdrom_bdops_ioctl(struct block_device *bdev, fmode_t mode,
 	int ret;
 
 	mutex_lock(&gdrom_mutex);
-	ret = cdrom_ioctl(gd.cd_info, bdev, mode, cmd, arg);
+	ret = cdrom_ioctl(gd.cd_info, bdev, cmd, arg);
 	mutex_unlock(&gdrom_mutex);
 
 	return ret;
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 61b83880e395a4..444c7efc14cba7 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -539,7 +539,7 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
 	scsi_autopm_get_device(sdev);
 
 	if (cmd != CDROMCLOSETRAY && cmd != CDROMEJECT) {
-		ret = cdrom_ioctl(&cd->cdi, bdev, mode, cmd, arg);
+		ret = cdrom_ioctl(&cd->cdi, bdev, cmd, arg);
 		if (ret != -ENOSYS)
 			goto put;
 	}
diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h
index cc5717cb0fa8a8..4aea8c82d16971 100644
--- a/include/linux/cdrom.h
+++ b/include/linux/cdrom.h
@@ -103,8 +103,8 @@ int cdrom_read_tocentry(struct cdrom_device_info *cdi,
 /* the general block_device operations structure: */
 int cdrom_open(struct cdrom_device_info *cdi, fmode_t mode);
 extern void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode);
-extern int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
-		       fmode_t mode, unsigned int cmd, unsigned long arg);
+int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
+		unsigned int cmd, unsigned long arg);
 extern unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
 				       unsigned int clearing);
 
-- 
2.39.2

Re: [PATCH 03/31] cdrom: remove the unused mode argument to cdrom_ioctl

[Phillip Potter]

On Tue, Jun 06, 2023 at 09:39:22AM +0200, Christoph Hellwig wrote:
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
> ---
>  drivers/cdrom/cdrom.c | 2 +-
>  drivers/cdrom/gdrom.c | 2 +-
>  drivers/scsi/sr.c     | 2 +-
>  include/linux/cdrom.h | 4 ++--
>  4 files changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
> index e3eab319cb0474..245e5bbb05d41c 100644
> --- a/drivers/cdrom/cdrom.c
> +++ b/drivers/cdrom/cdrom.c
> @@ -3336,7 +3336,7 @@ static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
>   * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
>   */
>  int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
> -		fmode_t mode, unsigned int cmd, unsigned long arg)
> +		unsigned int cmd, unsigned long arg)
>  {
>  	void __user *argp = (void __user *)arg;
>  	int ret;
> diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
> index eaa2d5a90bc82f..14922403983e9e 100644
> --- a/drivers/cdrom/gdrom.c
> +++ b/drivers/cdrom/gdrom.c
> @@ -505,7 +505,7 @@ static int gdrom_bdops_ioctl(struct block_device *bdev, fmode_t mode,
>  	int ret;
>  
>  	mutex_lock(&gdrom_mutex);
> -	ret = cdrom_ioctl(gd.cd_info, bdev, mode, cmd, arg);
> +	ret = cdrom_ioctl(gd.cd_info, bdev, cmd, arg);
>  	mutex_unlock(&gdrom_mutex);
>  
>  	return ret;
> diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
> index 61b83880e395a4..444c7efc14cba7 100644
> --- a/drivers/scsi/sr.c
> +++ b/drivers/scsi/sr.c
> @@ -539,7 +539,7 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
>  	scsi_autopm_get_device(sdev);
>  
>  	if (cmd != CDROMCLOSETRAY && cmd != CDROMEJECT) {
> -		ret = cdrom_ioctl(&cd->cdi, bdev, mode, cmd, arg);
> +		ret = cdrom_ioctl(&cd->cdi, bdev, cmd, arg);
>  		if (ret != -ENOSYS)
>  			goto put;
>  	}
> diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h
> index cc5717cb0fa8a8..4aea8c82d16971 100644
> --- a/include/linux/cdrom.h
> +++ b/include/linux/cdrom.h
> @@ -103,8 +103,8 @@ int cdrom_read_tocentry(struct cdrom_device_info *cdi,
>  /* the general block_device operations structure: */
>  int cdrom_open(struct cdrom_device_info *cdi, fmode_t mode);
>  extern void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode);
> -extern int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
> -		       fmode_t mode, unsigned int cmd, unsigned long arg);
> +int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
> +		unsigned int cmd, unsigned long arg);
>  extern unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
>  				       unsigned int clearing);
>  
> -- 
> 2.39.2
> 

Thanks, looks good.

Signed-off-by: Phillip Potter <phil-j1cSt2lHDeZzjhtm8Ag3mw@public.gmane.org>

Regards,
Phil

Re: [PATCH 03/31] cdrom: remove the unused mode argument to cdrom_ioctl

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:22AM +0200, Christoph Hellwig wrote:
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>

Re: [PATCH 03/31] cdrom: remove the unused mode argument to cdrom_ioctl

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   drivers/cdrom/cdrom.c | 2 +-
>   drivers/cdrom/gdrom.c | 2 +-
>   drivers/scsi/sr.c     | 2 +-
>   include/linux/cdrom.h | 4 ++--
>   4 files changed, 5 insertions(+), 5 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

[PATCH 04/31] cdrom: remove the unused cdrom_close_write release code

[Christoph Hellwig]

cdrom_close_write is empty, and the for_data flag it is keyed off is
never set.  Remove all this clutter.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/cdrom/cdrom.c | 15 ---------------
 include/linux/cdrom.h |  1 -
 2 files changed, 16 deletions(-)

diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index 245e5bbb05d41c..08abf1ffede002 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -978,15 +978,6 @@ static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
 	cdi->media_written = 0;
 }
 
-static int cdrom_close_write(struct cdrom_device_info *cdi)
-{
-#if 0
-	return cdrom_flush_cache(cdi);
-#else
-	return 0;
-#endif
-}
-
 /* badly broken, I know. Is due for a fixup anytime. */
 static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
 {
@@ -1282,12 +1273,6 @@ void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
 	opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
 		!(mode & FMODE_NDELAY);
 
-	/*
-	 * flush cache on last write release
-	 */
-	if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
-		cdrom_close_write(cdi);
-
 	cdo->release(cdi);
 	if (cdi->use_count == 0) {      /* last process that closes dev*/
 		if (opened_for_data &&
diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h
index 4aea8c82d16971..0a5db0b0c958a1 100644
--- a/include/linux/cdrom.h
+++ b/include/linux/cdrom.h
@@ -61,7 +61,6 @@ struct cdrom_device_info {
 	__u8 last_sense;
 	__u8 media_written;		/* dirty flag, DVD+RW bookkeeping */
 	unsigned short mmc3_profile;	/* current MMC3 profile */
-	int for_data;
 	int (*exit)(struct cdrom_device_info *);
 	int mrw_mode_page;
 	__s64 last_media_change_ms;
-- 
2.39.2

Re: [PATCH 04/31] cdrom: remove the unused cdrom_close_write release code

[Phillip Potter]

On Tue, Jun 06, 2023 at 09:39:23AM +0200, Christoph Hellwig wrote:
> cdrom_close_write is empty, and the for_data flag it is keyed off is
> never set.  Remove all this clutter.
> 
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
> ---
>  drivers/cdrom/cdrom.c | 15 ---------------
>  include/linux/cdrom.h |  1 -
>  2 files changed, 16 deletions(-)
> 
> diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
> index 245e5bbb05d41c..08abf1ffede002 100644
> --- a/drivers/cdrom/cdrom.c
> +++ b/drivers/cdrom/cdrom.c
> @@ -978,15 +978,6 @@ static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
>  	cdi->media_written = 0;
>  }
>  
> -static int cdrom_close_write(struct cdrom_device_info *cdi)
> -{
> -#if 0
> -	return cdrom_flush_cache(cdi);
> -#else
> -	return 0;
> -#endif
> -}
> -
>  /* badly broken, I know. Is due for a fixup anytime. */
>  static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
>  {
> @@ -1282,12 +1273,6 @@ void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
>  	opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
>  		!(mode & FMODE_NDELAY);
>  
> -	/*
> -	 * flush cache on last write release
> -	 */
> -	if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
> -		cdrom_close_write(cdi);
> -
>  	cdo->release(cdi);
>  	if (cdi->use_count == 0) {      /* last process that closes dev*/
>  		if (opened_for_data &&
> diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h
> index 4aea8c82d16971..0a5db0b0c958a1 100644
> --- a/include/linux/cdrom.h
> +++ b/include/linux/cdrom.h
> @@ -61,7 +61,6 @@ struct cdrom_device_info {
>  	__u8 last_sense;
>  	__u8 media_written;		/* dirty flag, DVD+RW bookkeeping */
>  	unsigned short mmc3_profile;	/* current MMC3 profile */
> -	int for_data;
>  	int (*exit)(struct cdrom_device_info *);
>  	int mrw_mode_page;
>  	__s64 last_media_change_ms;
> -- 
> 2.39.2
> 

All good, many thanks.

Signed-off-by: Phillip Potter <phil-j1cSt2lHDeZzjhtm8Ag3mw@public.gmane.org>

Regards,
Phil

Re: [PATCH 04/31] cdrom: remove the unused cdrom_close_write release code

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:23AM +0200, Christoph Hellwig wrote:
> cdrom_close_write is empty, and the for_data flag it is keyed off is
> never set.  Remove all this clutter.
> 
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>

Re: [PATCH 04/31] cdrom: remove the unused cdrom_close_write release code

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> cdrom_close_write is empty, and the for_data flag it is keyed off is
> never set.  Remove all this clutter.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   drivers/cdrom/cdrom.c | 15 ---------------
>   include/linux/cdrom.h |  1 -
>   2 files changed, 16 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

[PATCH 05/31] cdrom: track if a cdrom_device_info was opened for data

[Christoph Hellwig]

Set a flag when a cdrom_device_info is opened for writing, instead of
trying to figure out this at release time.  This will allow to eventually
remove the mode argument to the ->release block_device_operation as
nothing but the CDROM drivers uses that argument.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/cdrom/cdrom.c | 12 +++++-------
 include/linux/cdrom.h |  1 +
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index 08abf1ffede002..adebac1bd210d9 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -1172,6 +1172,7 @@ int cdrom_open(struct cdrom_device_info *cdi, fmode_t mode)
 			ret = 0;
 			cdi->media_written = 0;
 		}
+		cdi->opened_for_data = true;
 	}
 
 	if (ret)
@@ -1252,7 +1253,6 @@ static int check_for_audio_disc(struct cdrom_device_info *cdi,
 void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
 {
 	const struct cdrom_device_ops *cdo = cdi->ops;
-	int opened_for_data;
 
 	cd_dbg(CD_CLOSE, "entering cdrom_release\n");
 
@@ -1270,14 +1270,12 @@ void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
 		}
 	}
 
-	opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
-		!(mode & FMODE_NDELAY);
-
 	cdo->release(cdi);
-	if (cdi->use_count == 0) {      /* last process that closes dev*/
-		if (opened_for_data &&
-		    cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
+
+	if (cdi->use_count == 0 && cdi->opened_for_data) {
+		if (cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
 			cdo->tray_move(cdi, 1);
+		cdi->opened_for_data = false;
 	}
 }
 EXPORT_SYMBOL(cdrom_release);
diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h
index 0a5db0b0c958a1..385e94732b2cf1 100644
--- a/include/linux/cdrom.h
+++ b/include/linux/cdrom.h
@@ -64,6 +64,7 @@ struct cdrom_device_info {
 	int (*exit)(struct cdrom_device_info *);
 	int mrw_mode_page;
 	__s64 last_media_change_ms;
+	bool opened_for_data;
 };
 
 struct cdrom_device_ops {
-- 
2.39.2

Re: [PATCH 05/31] cdrom: track if a cdrom_device_info was opened for data

[Phillip Potter]

On Tue, Jun 06, 2023 at 09:39:24AM +0200, Christoph Hellwig wrote:
> Set a flag when a cdrom_device_info is opened for writing, instead of
> trying to figure out this at release time.  This will allow to eventually
> remove the mode argument to the ->release block_device_operation as
> nothing but the CDROM drivers uses that argument.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  drivers/cdrom/cdrom.c | 12 +++++-------
>  include/linux/cdrom.h |  1 +
>  2 files changed, 6 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
> index 08abf1ffede002..adebac1bd210d9 100644
> --- a/drivers/cdrom/cdrom.c
> +++ b/drivers/cdrom/cdrom.c
> @@ -1172,6 +1172,7 @@ int cdrom_open(struct cdrom_device_info *cdi, fmode_t mode)
>  			ret = 0;
>  			cdi->media_written = 0;
>  		}
> +		cdi->opened_for_data = true;
>  	}
>  
>  	if (ret)
> @@ -1252,7 +1253,6 @@ static int check_for_audio_disc(struct cdrom_device_info *cdi,
>  void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
>  {
>  	const struct cdrom_device_ops *cdo = cdi->ops;
> -	int opened_for_data;
>  
>  	cd_dbg(CD_CLOSE, "entering cdrom_release\n");
>  
> @@ -1270,14 +1270,12 @@ void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
>  		}
>  	}
>  
> -	opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
> -		!(mode & FMODE_NDELAY);
> -
>  	cdo->release(cdi);
> -	if (cdi->use_count == 0) {      /* last process that closes dev*/
> -		if (opened_for_data &&
> -		    cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
> +
> +	if (cdi->use_count == 0 && cdi->opened_for_data) {
> +		if (cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
>  			cdo->tray_move(cdi, 1);
> +		cdi->opened_for_data = false;
>  	}
>  }
>  EXPORT_SYMBOL(cdrom_release);
> diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h
> index 0a5db0b0c958a1..385e94732b2cf1 100644
> --- a/include/linux/cdrom.h
> +++ b/include/linux/cdrom.h
> @@ -64,6 +64,7 @@ struct cdrom_device_info {
>  	int (*exit)(struct cdrom_device_info *);
>  	int mrw_mode_page;
>  	__s64 last_media_change_ms;
> +	bool opened_for_data;
>  };
>  
>  struct cdrom_device_ops {
> -- 
> 2.39.2
> 

Looks good, thanks.

Signed-off-by: Phillip Potter <phil@philpotter.co.uk>

Regards,
Phil

Re: [PATCH 05/31] cdrom: track if a cdrom_device_info was opened for data

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:24AM +0200, Christoph Hellwig wrote:
> Set a flag when a cdrom_device_info is opened for writing, instead of
> trying to figure out this at release time.  This will allow to eventually
> remove the mode argument to the ->release block_device_operation as
> nothing but the CDROM drivers uses that argument.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 05/31] cdrom: track if a cdrom_device_info was opened for data

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> Set a flag when a cdrom_device_info is opened for writing, instead of
> trying to figure out this at release time.  This will allow to eventually
> remove the mode argument to the ->release block_device_operation as
> nothing but the CDROM drivers uses that argument.
> 
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
> ---
>   drivers/cdrom/cdrom.c | 12 +++++-------
>   include/linux/cdrom.h |  1 +
>   2 files changed, 6 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
> index 08abf1ffede002..adebac1bd210d9 100644
> --- a/drivers/cdrom/cdrom.c
> +++ b/drivers/cdrom/cdrom.c
> @@ -1172,6 +1172,7 @@ int cdrom_open(struct cdrom_device_info *cdi, fmode_t mode)
>   			ret = 0;
>   			cdi->media_written = 0;
>   		}
> +		cdi->opened_for_data = true;
>   	}
>   
>   	if (ret)
> @@ -1252,7 +1253,6 @@ static int check_for_audio_disc(struct cdrom_device_info *cdi,
>   void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
>   {
>   	const struct cdrom_device_ops *cdo = cdi->ops;
> -	int opened_for_data;
>   
>   	cd_dbg(CD_CLOSE, "entering cdrom_release\n");
>   
> @@ -1270,14 +1270,12 @@ void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
>   		}
>   	}
>   
> -	opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
> -		!(mode & FMODE_NDELAY);
> -
>   	cdo->release(cdi);
> -	if (cdi->use_count == 0) {      /* last process that closes dev*/
> -		if (opened_for_data &&
> -		    cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
> +
> +	if (cdi->use_count == 0 && cdi->opened_for_data) {
> +		if (cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
>   			cdo->tray_move(cdi, 1);
> +		cdi->opened_for_data = false;
>   	}
>   }
>   EXPORT_SYMBOL(cdrom_release);
> diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h
> index 0a5db0b0c958a1..385e94732b2cf1 100644
> --- a/include/linux/cdrom.h
> +++ b/include/linux/cdrom.h
> @@ -64,6 +64,7 @@ struct cdrom_device_info {
>   	int (*exit)(struct cdrom_device_info *);
>   	int mrw_mode_page;
>   	__s64 last_media_change_ms;
> +	bool opened_for_data;
>   };
>   
>   struct cdrom_device_ops {

Do we care about alignment here?
integer followed by a 64 bit value followed by a bool seems
like an automatic padding to me ...

Cheers,

Hannes

Re: [PATCH 05/31] cdrom: track if a cdrom_device_info was opened for data

[Christoph Hellwig]

On Wed, Jun 07, 2023 at 02:13:33PM +0200, Hannes Reinecke wrote:
>> +++ b/include/linux/cdrom.h
>> @@ -64,6 +64,7 @@ struct cdrom_device_info {
>>   	int (*exit)(struct cdrom_device_info *);
>>   	int mrw_mode_page;
>>   	__s64 last_media_change_ms;
>> +	bool opened_for_data;
>>   };
>>     struct cdrom_device_ops {
>
> Do we care about alignment here?
> integer followed by a 64 bit value followed by a bool seems
> like an automatic padding to me ...

I don't think the structure matter much here, but placing it before
last_media_change_ms still seems better.  I'll change it.

[PATCH 06/31] cdrom: remove the unused mode argument to cdrom_release

[Christoph Hellwig]

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/cdrom/cdrom.c | 2 +-
 drivers/cdrom/gdrom.c | 2 +-
 drivers/scsi/sr.c     | 2 +-
 include/linux/cdrom.h | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index adebac1bd210d9..998b03fe976e22 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -1250,7 +1250,7 @@ static int check_for_audio_disc(struct cdrom_device_info *cdi,
 	return 0;
 }
 
-void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
+void cdrom_release(struct cdrom_device_info *cdi)
 {
 	const struct cdrom_device_ops *cdo = cdi->ops;
 
diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
index 14922403983e9e..a401dc4218a998 100644
--- a/drivers/cdrom/gdrom.c
+++ b/drivers/cdrom/gdrom.c
@@ -481,7 +481,7 @@ static int gdrom_bdops_open(struct block_device *bdev, fmode_t mode)
 	bdev_check_media_change(bdev);
 
 	mutex_lock(&gdrom_mutex);
-	ret = cdrom_open(gd.cd_info, mode);
+	ret = cdrom_open(gd.cd_info);
 	mutex_unlock(&gdrom_mutex);
 	return ret;
 }
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 444c7efc14cba7..6d33120ee5ba85 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -512,7 +512,7 @@ static void sr_block_release(struct gendisk *disk, fmode_t mode)
 	struct scsi_cd *cd = scsi_cd(disk);
 
 	mutex_lock(&cd->lock);
-	cdrom_release(&cd->cdi, mode);
+	cdrom_release(&cd->cdi);
 	mutex_unlock(&cd->lock);
 
 	scsi_device_put(cd->device);
diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h
index 385e94732b2cf1..3f23d5239de254 100644
--- a/include/linux/cdrom.h
+++ b/include/linux/cdrom.h
@@ -102,7 +102,7 @@ int cdrom_read_tocentry(struct cdrom_device_info *cdi,
 
 /* the general block_device operations structure: */
 int cdrom_open(struct cdrom_device_info *cdi, fmode_t mode);
-extern void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode);
+void cdrom_release(struct cdrom_device_info *cdi);
 int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
 		unsigned int cmd, unsigned long arg);
 extern unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
-- 
2.39.2

Re: [PATCH 06/31] cdrom: remove the unused mode argument to cdrom_release

[Phillip Potter]

On Tue, Jun 06, 2023 at 09:39:25AM +0200, Christoph Hellwig wrote:
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
> ---
>  drivers/cdrom/cdrom.c | 2 +-
>  drivers/cdrom/gdrom.c | 2 +-
>  drivers/scsi/sr.c     | 2 +-
>  include/linux/cdrom.h | 2 +-
>  4 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
> index adebac1bd210d9..998b03fe976e22 100644
> --- a/drivers/cdrom/cdrom.c
> +++ b/drivers/cdrom/cdrom.c
> @@ -1250,7 +1250,7 @@ static int check_for_audio_disc(struct cdrom_device_info *cdi,
>  	return 0;
>  }
>  
> -void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
> +void cdrom_release(struct cdrom_device_info *cdi)
>  {
>  	const struct cdrom_device_ops *cdo = cdi->ops;
>  
> diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
> index 14922403983e9e..a401dc4218a998 100644
> --- a/drivers/cdrom/gdrom.c
> +++ b/drivers/cdrom/gdrom.c
> @@ -481,7 +481,7 @@ static int gdrom_bdops_open(struct block_device *bdev, fmode_t mode)
>  	bdev_check_media_change(bdev);
>  
>  	mutex_lock(&gdrom_mutex);
> -	ret = cdrom_open(gd.cd_info, mode);
> +	ret = cdrom_open(gd.cd_info);
>  	mutex_unlock(&gdrom_mutex);
>  	return ret;
>  }
> diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
> index 444c7efc14cba7..6d33120ee5ba85 100644
> --- a/drivers/scsi/sr.c
> +++ b/drivers/scsi/sr.c
> @@ -512,7 +512,7 @@ static void sr_block_release(struct gendisk *disk, fmode_t mode)
>  	struct scsi_cd *cd = scsi_cd(disk);
>  
>  	mutex_lock(&cd->lock);
> -	cdrom_release(&cd->cdi, mode);
> +	cdrom_release(&cd->cdi);
>  	mutex_unlock(&cd->lock);
>  
>  	scsi_device_put(cd->device);
> diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h
> index 385e94732b2cf1..3f23d5239de254 100644
> --- a/include/linux/cdrom.h
> +++ b/include/linux/cdrom.h
> @@ -102,7 +102,7 @@ int cdrom_read_tocentry(struct cdrom_device_info *cdi,
>  
>  /* the general block_device operations structure: */
>  int cdrom_open(struct cdrom_device_info *cdi, fmode_t mode);
> -extern void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode);
> +void cdrom_release(struct cdrom_device_info *cdi);
>  int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
>  		unsigned int cmd, unsigned long arg);
>  extern unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
> -- 
> 2.39.2
> 

Looks good, thanks.

Signed-off-by: Phillip Potter <phil-j1cSt2lHDeZzjhtm8Ag3mw@public.gmane.org>

Regards,
Phil

Re: [PATCH 06/31] cdrom: remove the unused mode argument to cdrom_release

[Christoph Hellwig]

On Wed, Jun 07, 2023 at 12:00:57AM +0100, Phillip Potter wrote:
> Looks good, thanks.
> 
> Signed-off-by: Phillip Potter <phil@philpotter.co.uk>

Hmm, these signoffs don't really make sense here.  Were they intended
as Reviewed-bys?

Re: [PATCH 06/31] cdrom: remove the unused mode argument to cdrom_release

[Phillip Potter]

On Thu, Jun 08, 2023 at 10:41:29AM +0200, Christoph Hellwig wrote:
> On Wed, Jun 07, 2023 at 12:00:57AM +0100, Phillip Potter wrote:
> > Looks good, thanks.
> > 
> > Signed-off-by: Phillip Potter <phil-j1cSt2lHDeZzjhtm8Ag3mw@public.gmane.org>
> 
> Hmm, these signoffs don't really make sense here.  Were they intended
> as Reviewed-bys?
> 
Hi Christoph,

Yes indeed - I was under the impression it was appropriate for a
maintainer to signal their approval of a patch to maintained code using
a Signed-off-by tag due to their involvement in the submission process?
Apologies if I've got this wrong, happy to send Reviewed-bys by all
means.

Regards,
Phil

Re: [PATCH 06/31] cdrom: remove the unused mode argument to cdrom_release

[Christoph Hellwig]

On Thu, Jun 08, 2023 at 09:47:27AM +0100, Phillip Potter wrote:
> Yes indeed - I was under the impression it was appropriate for a
> maintainer to signal their approval of a patch to maintained code using
> a Signed-off-by tag due to their involvement in the submission process?
> Apologies if I've got this wrong, happy to send Reviewed-bys by all
> means.

Signed-off-by is for the chain that the patches pass through.  You add
it when you apply or forward the patch.  Just give me a Reviewed-by
tag and say it shold apply to patches 1 to 6 and I'll add it.

Re: [PATCH 06/31] cdrom: remove the unused mode argument to cdrom_release

[Phillip Potter]

On Thu, Jun 08, 2023 at 11:04:44AM +0200, Christoph Hellwig wrote:
> On Thu, Jun 08, 2023 at 09:47:27AM +0100, Phillip Potter wrote:
> > Yes indeed - I was under the impression it was appropriate for a
> > maintainer to signal their approval of a patch to maintained code using
> > a Signed-off-by tag due to their involvement in the submission process?
> > Apologies if I've got this wrong, happy to send Reviewed-bys by all
> > means.
> 
> Signed-off-by is for the chain that the patches pass through.  You add
> it when you apply or forward the patch.  Just give me a Reviewed-by
> tag and say it shold apply to patches 1 to 6 and I'll add it.

Thanks for the guidance. Please apply the following to the block patch
(1) and the CD-ROM patches (2-6) of your series, all looks good to me:

Reviewed-by: Phillip Potter <phil@philpotter.co.uk>

Regards,
Phil

Re: [PATCH 06/31] cdrom: remove the unused mode argument to cdrom_release

[Guenter Roeck]

On Tue, Jun 06, 2023 at 09:39:25AM +0200, Christoph Hellwig wrote:
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
> ---

$ git grep cdrom_release
Documentation/cdrom/cdrom-standard.rst:         cdrom_release,          /* release */
Documentation/cdrom/cdrom-standard.rst:the door, should be left over to the general routine *cdrom_release()*.
Documentation/cdrom/cdrom-standard.rst: void cdrom_release(struct inode *ip, struct file *fp)
                                                                           ^^^^^^^^^^^^^^^^^
drivers/cdrom/cdrom.c:void cdrom_release(struct cdrom_device_info *cdi)
drivers/cdrom/cdrom.c:  cd_dbg(CD_CLOSE, "entering cdrom_release\n");
drivers/cdrom/cdrom.c:EXPORT_SYMBOL(cdrom_release);
drivers/cdrom/gdrom.c:  cdrom_release(gd.cd_info, mode);
                                                ^^^^^^
drivers/scsi/sr.c:      cdrom_release(&cd->cdi);
include/linux/cdrom.h:void cdrom_release(struct cdrom_device_info *cdi);

$ git grep cdrom_open
Documentation/cdrom/cdrom-standard.rst:         cdrom_open,             /* open */
Documentation/cdrom/cdrom-standard.rst: int cdrom_open(struct inode * ip, struct file * fp)
Documentation/cdrom/cdrom-standard.rst:This function implements the reverse-logic of *cdrom_open()*, and then
drivers/cdrom/cdrom.c:static int cdrom_open_write(struct cdrom_device_info *cdi)
drivers/cdrom/cdrom.c:int cdrom_open(struct cdrom_device_info *cdi, blk_mode_t mode)
drivers/cdrom/cdrom.c:  cd_dbg(CD_OPEN, "entering cdrom_open\n");
drivers/cdrom/cdrom.c:                  if (cdrom_open_write(cdi))
drivers/cdrom/cdrom.c:EXPORT_SYMBOL(cdrom_open);
drivers/cdrom/gdrom.c:  ret = cdrom_open(gd.cd_info);
                                         ^^^^^^^^^^
drivers/scsi/sr.c:      ret = cdrom_open(&cd->cdi, mode);
include/linux/cdrom.h:int cdrom_open(struct cdrom_device_info *cdi, blk_mode_t mode);

>  drivers/cdrom/cdrom.c | 2 +-
>  drivers/cdrom/gdrom.c | 2 +-
>  drivers/scsi/sr.c     | 2 +-
>  include/linux/cdrom.h | 2 +-
>  4 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
> index adebac1bd210d9..998b03fe976e22 100644
> --- a/drivers/cdrom/cdrom.c
> +++ b/drivers/cdrom/cdrom.c
> @@ -1250,7 +1250,7 @@ static int check_for_audio_disc(struct cdrom_device_info *cdi,
>  	return 0;
>  }
>  
> -void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
> +void cdrom_release(struct cdrom_device_info *cdi)
>  {
>  	const struct cdrom_device_ops *cdo = cdi->ops;
>  
> diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
> index 14922403983e9e..a401dc4218a998 100644
> --- a/drivers/cdrom/gdrom.c
> +++ b/drivers/cdrom/gdrom.c
> @@ -481,7 +481,7 @@ static int gdrom_bdops_open(struct block_device *bdev, fmode_t mode)
>  	bdev_check_media_change(bdev);
>  
>  	mutex_lock(&gdrom_mutex);
> -	ret = cdrom_open(gd.cd_info, mode);
> +	ret = cdrom_open(gd.cd_info);
>  	mutex_unlock(&gdrom_mutex);
>  	return ret;
>  }
> diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
> index 444c7efc14cba7..6d33120ee5ba85 100644
> --- a/drivers/scsi/sr.c
> +++ b/drivers/scsi/sr.c
> @@ -512,7 +512,7 @@ static void sr_block_release(struct gendisk *disk, fmode_t mode)
>  	struct scsi_cd *cd = scsi_cd(disk);
>  
>  	mutex_lock(&cd->lock);
> -	cdrom_release(&cd->cdi, mode);
> +	cdrom_release(&cd->cdi);
>  	mutex_unlock(&cd->lock);
>  
>  	scsi_device_put(cd->device);
> diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h
> index 385e94732b2cf1..3f23d5239de254 100644
> --- a/include/linux/cdrom.h
> +++ b/include/linux/cdrom.h
> @@ -102,7 +102,7 @@ int cdrom_read_tocentry(struct cdrom_device_info *cdi,
>  
>  /* the general block_device operations structure: */
>  int cdrom_open(struct cdrom_device_info *cdi, fmode_t mode);
> -extern void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode);
> +void cdrom_release(struct cdrom_device_info *cdi);
>  int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
>  		unsigned int cmd, unsigned long arg);
>  extern unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
> -- 
> 2.39.2
> 
> 
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/

Re: [PATCH 06/31] cdrom: remove the unused mode argument to cdrom_release

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:25AM +0200, Christoph Hellwig wrote:
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 06/31] cdrom: remove the unused mode argument to cdrom_release

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   drivers/cdrom/cdrom.c | 2 +-
>   drivers/cdrom/gdrom.c | 2 +-
>   drivers/scsi/sr.c     | 2 +-
>   include/linux/cdrom.h | 2 +-
>   4 files changed, 4 insertions(+), 4 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

[PATCH 07/31] block: pass a gendisk on bdev_check_media_change

[Christoph Hellwig]

bdev_check_media_change should only ever be called for the whole device.
Pass a gendisk to make that explicit and rename the function to
disk_check_media_change.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/disk-events.c     | 18 +++++++++---------
 drivers/block/amiflop.c |  2 +-
 drivers/block/ataflop.c |  6 +++---
 drivers/block/floppy.c  | 16 ++++++++--------
 drivers/block/swim.c    |  2 +-
 drivers/block/swim3.c   |  2 +-
 drivers/cdrom/gdrom.c   |  2 +-
 drivers/md/md.c         |  2 +-
 drivers/scsi/sd.c       |  9 ++++-----
 drivers/scsi/sr.c       |  2 +-
 include/linux/blkdev.h  |  2 +-
 11 files changed, 31 insertions(+), 32 deletions(-)

diff --git a/block/disk-events.c b/block/disk-events.c
index aee25a7e1ab7de..8b1b63225738f8 100644
--- a/block/disk-events.c
+++ b/block/disk-events.c
@@ -263,31 +263,31 @@ static unsigned int disk_clear_events(struct gendisk *disk, unsigned int mask)
 }
 
 /**
- * bdev_check_media_change - check if a removable media has been changed
- * @bdev: block device to check
+ * disk_check_media_change - check if a removable media has been changed
+ * @disk: gendisk to check
  *
  * Check whether a removable media has been changed, and attempt to free all
  * dentries and inodes and invalidates all block device page cache entries in
  * that case.
  *
- * Returns %true if the block device changed, or %false if not.
+ * Returns %true if the media has changed, or %false if not.
  */
-bool bdev_check_media_change(struct block_device *bdev)
+bool disk_check_media_change(struct gendisk *disk)
 {
 	unsigned int events;
 
-	events = disk_clear_events(bdev->bd_disk, DISK_EVENT_MEDIA_CHANGE |
+	events = disk_clear_events(disk, DISK_EVENT_MEDIA_CHANGE |
 				   DISK_EVENT_EJECT_REQUEST);
 	if (!(events & DISK_EVENT_MEDIA_CHANGE))
 		return false;
 
-	if (__invalidate_device(bdev, true))
+	if (__invalidate_device(disk->part0, true))
 		pr_warn("VFS: busy inodes on changed media %s\n",
-			bdev->bd_disk->disk_name);
-	set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
+			disk->disk_name);
+	set_bit(GD_NEED_PART_SCAN, &disk->state);
 	return true;
 }
-EXPORT_SYMBOL(bdev_check_media_change);
+EXPORT_SYMBOL(disk_check_media_change);
 
 /**
  * disk_force_media_change - force a media change event
diff --git a/drivers/block/amiflop.c b/drivers/block/amiflop.c
index 4c8b2ba579ee6d..6de12b311749a1 100644
--- a/drivers/block/amiflop.c
+++ b/drivers/block/amiflop.c
@@ -1675,7 +1675,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 	}
 
 	if (mode & (FMODE_READ|FMODE_WRITE)) {
-		bdev_check_media_change(bdev);
+		disk_check_media_change(bdev->bd_disk);
 		if (mode & FMODE_WRITE) {
 			int wrprot;
 
diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index 9deb4df6bdb8b2..da481ddbca90db 100644
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -1760,8 +1760,8 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
 		/* invalidate the buffer track to force a reread */
 		BufferDrive = -1;
 		set_bit(drive, &fake_change);
-		if (bdev_check_media_change(bdev))
-			floppy_revalidate(bdev->bd_disk);
+		if (disk_check_media_change(disk))
+			floppy_revalidate(disk);
 		return 0;
 	default:
 		return -EINVAL;
@@ -1938,7 +1938,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 		return 0;
 
 	if (mode & (FMODE_READ|FMODE_WRITE)) {
-		if (bdev_check_media_change(bdev))
+		if (disk_check_media_change(bdev->bd_disk))
 			floppy_revalidate(bdev->bd_disk);
 		if (mode & FMODE_WRITE) {
 			if (p->wpstat) {
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 28ec6b442e9c58..3accafcbc95c85 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -3210,13 +3210,13 @@ static int floppy_raw_cmd_ioctl(int type, int drive, int cmd,
 
 #endif
 
-static int invalidate_drive(struct block_device *bdev)
+static int invalidate_drive(struct gendisk *disk)
 {
 	/* invalidate the buffer track to force a reread */
-	set_bit((long)bdev->bd_disk->private_data, &fake_change);
+	set_bit((long)disk->private_data, &fake_change);
 	process_fd_request();
-	if (bdev_check_media_change(bdev))
-		floppy_revalidate(bdev->bd_disk);
+	if (disk_check_media_change(disk))
+		floppy_revalidate(disk);
 	return 0;
 }
 
@@ -3287,7 +3287,7 @@ static int set_geometry(unsigned int cmd, struct floppy_struct *g,
 		    drive_state[current_drive].maxtrack ||
 		    ((user_params[drive].sect ^ oldStretch) &
 		     (FD_SWAPSIDES | FD_SECTBASEMASK)))
-			invalidate_drive(bdev);
+			invalidate_drive(bdev->bd_disk);
 		else
 			process_fd_request();
 	}
@@ -3464,7 +3464,7 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
 		current_type[drive] = NULL;
 		floppy_sizes[drive] = MAX_DISK_SIZE << 1;
 		drive_state[drive].keep_data = 0;
-		return invalidate_drive(bdev);
+		return invalidate_drive(bdev->bd_disk);
 	case FDSETPRM:
 	case FDDEFPRM:
 		return set_geometry(cmd, &inparam.g, drive, type, bdev);
@@ -3503,7 +3503,7 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
 	case FDFLUSH:
 		if (lock_fdc(drive))
 			return -EINTR;
-		return invalidate_drive(bdev);
+		return invalidate_drive(bdev->bd_disk);
 	case FDSETEMSGTRESH:
 		drive_params[drive].max_errors.reporting = (unsigned short)(param & 0x0f);
 		return 0;
@@ -4054,7 +4054,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 			drive_state[drive].last_checked = 0;
 			clear_bit(FD_OPEN_SHOULD_FAIL_BIT,
 				  &drive_state[drive].flags);
-			if (bdev_check_media_change(bdev))
+			if (disk_check_media_change(bdev->bd_disk))
 				floppy_revalidate(bdev->bd_disk);
 			if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags))
 				goto out;
diff --git a/drivers/block/swim.c b/drivers/block/swim.c
index 42b4b682869096..105bc5fd1b8c62 100644
--- a/drivers/block/swim.c
+++ b/drivers/block/swim.c
@@ -640,7 +640,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 		return 0;
 
 	if (mode & (FMODE_READ|FMODE_WRITE)) {
-		if (bdev_check_media_change(bdev) && fs->disk_in)
+		if (disk_check_media_change(bdev->bd_disk) && fs->disk_in)
 			fs->ejected = 0;
 		if ((mode & FMODE_WRITE) && fs->write_protected) {
 			err = -EROFS;
diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c
index da811a7da03f3d..3d689ba312f568 100644
--- a/drivers/block/swim3.c
+++ b/drivers/block/swim3.c
@@ -963,7 +963,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 
 	if (err == 0 && (mode & FMODE_NDELAY) == 0
 	    && (mode & (FMODE_READ|FMODE_WRITE))) {
-		if (bdev_check_media_change(bdev))
+		if (disk_check_media_change(bdev->bd_disk))
 			floppy_revalidate(bdev->bd_disk);
 		if (fs->ejected)
 			err = -ENXIO;
diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
index a401dc4218a998..3cb92df38ebeb8 100644
--- a/drivers/cdrom/gdrom.c
+++ b/drivers/cdrom/gdrom.c
@@ -478,7 +478,7 @@ static int gdrom_bdops_open(struct block_device *bdev, fmode_t mode)
 {
 	int ret;
 
-	bdev_check_media_change(bdev);
+	disk_check_media_change(bdev->bd_disk);
 
 	mutex_lock(&gdrom_mutex);
 	ret = cdrom_open(gd.cd_info);
diff --git a/drivers/md/md.c b/drivers/md/md.c
index fabf9c543735b6..77046c91bea439 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -7789,7 +7789,7 @@ static int md_open(struct block_device *bdev, fmode_t mode)
 	atomic_inc(&mddev->openers);
 	mutex_unlock(&mddev->open_mutex);
 
-	bdev_check_media_change(bdev);
+	disk_check_media_change(bdev->bd_disk);
 	return 0;
 
 out_unlock:
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 1624d528aa1f9c..aab649d5bad3f8 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1280,11 +1280,10 @@ static void sd_uninit_command(struct scsi_cmnd *SCpnt)
 		mempool_free(rq->special_vec.bv_page, sd_page_pool);
 }
 
-static bool sd_need_revalidate(struct block_device *bdev,
-		struct scsi_disk *sdkp)
+static bool sd_need_revalidate(struct gendisk *disk, struct scsi_disk *sdkp)
 {
 	if (sdkp->device->removable || sdkp->write_prot) {
-		if (bdev_check_media_change(bdev))
+		if (disk_check_media_change(disk))
 			return true;
 	}
 
@@ -1293,7 +1292,7 @@ static bool sd_need_revalidate(struct block_device *bdev,
 	 * nothing to do with partitions, BLKRRPART is used to force a full
 	 * revalidate after things like a format for historical reasons.
 	 */
-	return test_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
+	return test_bit(GD_NEED_PART_SCAN, &disk->state);
 }
 
 /**
@@ -1330,7 +1329,7 @@ static int sd_open(struct block_device *bdev, fmode_t mode)
 	if (!scsi_block_when_processing_errors(sdev))
 		goto error_out;
 
-	if (sd_need_revalidate(bdev, sdkp))
+	if (sd_need_revalidate(bdev->bd_disk, sdkp))
 		sd_revalidate_disk(bdev->bd_disk);
 
 	/*
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 6d33120ee5ba85..1592e6e10c7452 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -494,7 +494,7 @@ static int sr_block_open(struct block_device *bdev, fmode_t mode)
 		return -ENXIO;
 
 	scsi_autopm_get_device(sdev);
-	if (bdev_check_media_change(bdev))
+	if (disk_check_media_change(bdev->bd_disk))
 		sr_revalidate_disk(cd);
 
 	mutex_lock(&cd->lock);
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index f4c339d9dd03de..a1688eba7e5e9a 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -817,7 +817,7 @@ int __register_blkdev(unsigned int major, const char *name,
 	__register_blkdev(major, name, NULL)
 void unregister_blkdev(unsigned int major, const char *name);
 
-bool bdev_check_media_change(struct block_device *bdev);
+bool disk_check_media_change(struct gendisk *disk);
 int __invalidate_device(struct block_device *bdev, bool kill_dirty);
 void set_capacity(struct gendisk *disk, sector_t size);
 
-- 
2.39.2

Re: [PATCH 07/31] block: pass a gendisk on bdev_check_media_change

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:26AM +0200, Christoph Hellwig wrote:
> bdev_check_media_change should only ever be called for the whole device.
> Pass a gendisk to make that explicit and rename the function to
> disk_check_media_change.
> 
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
> ---

Under the assumption it did only in fact ever only get called on the
whole device so far,
Acked-by: Christian Brauner <brauner-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>

Re: [PATCH 07/31] block: pass a gendisk on bdev_check_media_change

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> bdev_check_media_change should only ever be called for the whole device.
> Pass a gendisk to make that explicit and rename the function to
> disk_check_media_change.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   block/disk-events.c     | 18 +++++++++---------
>   drivers/block/amiflop.c |  2 +-
>   drivers/block/ataflop.c |  6 +++---
>   drivers/block/floppy.c  | 16 ++++++++--------
>   drivers/block/swim.c    |  2 +-
>   drivers/block/swim3.c   |  2 +-
>   drivers/cdrom/gdrom.c   |  2 +-
>   drivers/md/md.c         |  2 +-
>   drivers/scsi/sd.c       |  9 ++++-----
>   drivers/scsi/sr.c       |  2 +-
>   include/linux/blkdev.h  |  2 +-
>   11 files changed, 31 insertions(+), 32 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

[PATCH 08/31] block: share code between disk_check_media_change and disk_force_media_change

[Christoph Hellwig]

Factor the common logic between disk_check_media_change and
disk_force_media_change into a helper.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/disk-events.c | 37 ++++++++++++++++---------------------
 1 file changed, 16 insertions(+), 21 deletions(-)

diff --git a/block/disk-events.c b/block/disk-events.c
index 8b1b63225738f8..06f325662b3494 100644
--- a/block/disk-events.c
+++ b/block/disk-events.c
@@ -262,6 +262,18 @@ static unsigned int disk_clear_events(struct gendisk *disk, unsigned int mask)
 	return pending;
 }
 
+static bool __disk_check_media_change(struct gendisk *disk, unsigned int events)
+{
+	if (!(events & DISK_EVENT_MEDIA_CHANGE))
+		return false;
+
+	if (__invalidate_device(disk->part0, true))
+		pr_warn("VFS: busy inodes on changed media %s\n",
+			disk->disk_name);
+	set_bit(GD_NEED_PART_SCAN, &disk->state);
+	return true;
+}
+
 /**
  * disk_check_media_change - check if a removable media has been changed
  * @disk: gendisk to check
@@ -274,18 +286,9 @@ static unsigned int disk_clear_events(struct gendisk *disk, unsigned int mask)
  */
 bool disk_check_media_change(struct gendisk *disk)
 {
-	unsigned int events;
-
-	events = disk_clear_events(disk, DISK_EVENT_MEDIA_CHANGE |
-				   DISK_EVENT_EJECT_REQUEST);
-	if (!(events & DISK_EVENT_MEDIA_CHANGE))
-		return false;
-
-	if (__invalidate_device(disk->part0, true))
-		pr_warn("VFS: busy inodes on changed media %s\n",
-			disk->disk_name);
-	set_bit(GD_NEED_PART_SCAN, &disk->state);
-	return true;
+	return __disk_check_media_change(disk,
+			disk_clear_events(disk, DISK_EVENT_MEDIA_CHANGE |
+						DISK_EVENT_EJECT_REQUEST));
 }
 EXPORT_SYMBOL(disk_check_media_change);
 
@@ -303,15 +306,7 @@ EXPORT_SYMBOL(disk_check_media_change);
 bool disk_force_media_change(struct gendisk *disk, unsigned int events)
 {
 	disk_event_uevent(disk, events);
-
-	if (!(events & DISK_EVENT_MEDIA_CHANGE))
-		return false;
-
-	if (__invalidate_device(disk->part0, true))
-		pr_warn("VFS: busy inodes on changed media %s\n",
-			disk->disk_name);
-	set_bit(GD_NEED_PART_SCAN, &disk->state);
-	return true;
+	return __disk_check_media_change(disk, events);
 }
 EXPORT_SYMBOL_GPL(disk_force_media_change);
 
-- 
2.39.2

Re: [PATCH 08/31] block: share code between disk_check_media_change and disk_force_media_change

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:27AM +0200, Christoph Hellwig wrote:
> Factor the common logic between disk_check_media_change and
> disk_force_media_change into a helper.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 08/31] block: share code between disk_check_media_change and disk_force_media_change

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> Factor the common logic between disk_check_media_change and
> disk_force_media_change into a helper.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   block/disk-events.c | 37 ++++++++++++++++---------------------
>   1 file changed, 16 insertions(+), 21 deletions(-)
> 
> diff --git a/block/disk-events.c b/block/disk-events.c
> index 8b1b63225738f8..06f325662b3494 100644
> --- a/block/disk-events.c
> +++ b/block/disk-events.c
> @@ -262,6 +262,18 @@ static unsigned int disk_clear_events(struct gendisk *disk, unsigned int mask)
>   	return pending;
>   }
>   
> +static bool __disk_check_media_change(struct gendisk *disk, unsigned int events)
> +{
> +	if (!(events & DISK_EVENT_MEDIA_CHANGE))
> +		return false;
> +
> +	if (__invalidate_device(disk->part0, true))
> +		pr_warn("VFS: busy inodes on changed media %s\n",
> +			disk->disk_name);
> +	set_bit(GD_NEED_PART_SCAN, &disk->state);
> +	return true;
> +}
> +
>   /**
>    * disk_check_media_change - check if a removable media has been changed
>    * @disk: gendisk to check
> @@ -274,18 +286,9 @@ static unsigned int disk_clear_events(struct gendisk *disk, unsigned int mask)
>    */
>   bool disk_check_media_change(struct gendisk *disk)
>   {
> -	unsigned int events;
> -
> -	events = disk_clear_events(disk, DISK_EVENT_MEDIA_CHANGE |
> -				   DISK_EVENT_EJECT_REQUEST);
> -	if (!(events & DISK_EVENT_MEDIA_CHANGE))
> -		return false;
> -
> -	if (__invalidate_device(disk->part0, true))
> -		pr_warn("VFS: busy inodes on changed media %s\n",
> -			disk->disk_name);
> -	set_bit(GD_NEED_PART_SCAN, &disk->state);
> -	return true;
> +	return __disk_check_media_change(disk,
> +			disk_clear_events(disk, DISK_EVENT_MEDIA_CHANGE |
> +						DISK_EVENT_EJECT_REQUEST));

Can you move the call to disk_clear_events() out of the call to 
__disk_check_media_change()?
I find this pattern hard to read.

Cheers,

Hannes

Re: [PATCH 08/31] block: share code between disk_check_media_change and disk_force_media_change

[Christoph Hellwig]

On Wed, Jun 07, 2023 at 02:19:00PM +0200, Hannes Reinecke wrote:
>> -	return true;
>> +	return __disk_check_media_change(disk,
>> +			disk_clear_events(disk, DISK_EVENT_MEDIA_CHANGE |
>> +						DISK_EVENT_EJECT_REQUEST));
>
> Can you move the call to disk_clear_events() out of the call to 
> __disk_check_media_change()?
> I find this pattern hard to read.

I suspect you've not done enough functional programming in your youth :)

Re: [PATCH 08/31] block: share code between disk_check_media_change and disk_force_media_change

[Hannes Reinecke]

On 6/7/23 14:21, Christoph Hellwig wrote:
> On Wed, Jun 07, 2023 at 02:19:00PM +0200, Hannes Reinecke wrote:
>>> -	return true;
>>> +	return __disk_check_media_change(disk,
>>> +			disk_clear_events(disk, DISK_EVENT_MEDIA_CHANGE |
>>> +						DISK_EVENT_EJECT_REQUEST));
>>
>> Can you move the call to disk_clear_events() out of the call to
>> __disk_check_media_change()?
>> I find this pattern hard to read.
> 
> I suspect you've not done enough functional programming in your youth :)

That's why I said 'I find'; purely personal preference.
If you're happy with:

Reviewed-by: Hannes Reinecke <hare-l3A5Bk7waGM@public.gmane.org>

Cheers,

Hannes
(In my youth? One is tempted to quote Falco: "If you remember the '90s 
you haven't experienced them...")

[PATCH 09/31] block: pass a gendisk to ->open

[Christoph Hellwig]

->open is only called on the whole device.  Make that explicit by
passing a gendisk instead of the block_device.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 arch/um/drivers/ubd_kern.c          |  5 ++---
 arch/xtensa/platforms/iss/simdisk.c |  4 ++--
 block/bdev.c                        |  2 +-
 drivers/block/amiflop.c             |  8 ++++----
 drivers/block/aoe/aoeblk.c          |  4 ++--
 drivers/block/ataflop.c             | 16 +++++++--------
 drivers/block/drbd/drbd_main.c      |  6 +++---
 drivers/block/floppy.c              | 30 +++++++++++++++--------------
 drivers/block/nbd.c                 |  8 ++++----
 drivers/block/pktcdvd.c             |  6 +++---
 drivers/block/rbd.c                 |  4 ++--
 drivers/block/rnbd/rnbd-clt.c       |  4 ++--
 drivers/block/swim.c                | 10 +++++-----
 drivers/block/swim3.c               | 10 +++++-----
 drivers/block/ublk_drv.c            |  4 ++--
 drivers/block/z2ram.c               |  6 ++----
 drivers/block/zram/zram_drv.c       | 13 +++++--------
 drivers/cdrom/gdrom.c               |  4 ++--
 drivers/md/bcache/super.c           |  4 ++--
 drivers/md/dm.c                     |  4 ++--
 drivers/md/md.c                     |  6 +++---
 drivers/mmc/core/block.c            |  4 ++--
 drivers/mtd/mtd_blkdevs.c           |  4 ++--
 drivers/mtd/ubi/block.c             |  4 ++--
 drivers/nvme/host/core.c            |  4 ++--
 drivers/nvme/host/multipath.c       |  4 ++--
 drivers/s390/block/dasd.c           |  4 ++--
 drivers/s390/block/dcssblk.c        |  7 +++----
 drivers/scsi/sd.c                   | 12 ++++++------
 drivers/scsi/sr.c                   |  6 +++---
 include/linux/blkdev.h              |  2 +-
 31 files changed, 102 insertions(+), 107 deletions(-)

diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index f4c1e6e97ad520..6b831f82881bc4 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -108,7 +108,7 @@ static inline void ubd_set_bit(__u64 bit, unsigned char *data)
 static DEFINE_MUTEX(ubd_lock);
 static DEFINE_MUTEX(ubd_mutex); /* replaces BKL, might not be needed */
 
-static int ubd_open(struct block_device *bdev, fmode_t mode);
+static int ubd_open(struct gendisk *disk, fmode_t mode);
 static void ubd_release(struct gendisk *disk, fmode_t mode);
 static int ubd_ioctl(struct block_device *bdev, fmode_t mode,
 		     unsigned int cmd, unsigned long arg);
@@ -1154,9 +1154,8 @@ static int __init ubd_driver_init(void){
 
 device_initcall(ubd_driver_init);
 
-static int ubd_open(struct block_device *bdev, fmode_t mode)
+static int ubd_open(struct gendisk *disk, fmode_t mode)
 {
-	struct gendisk *disk = bdev->bd_disk;
 	struct ubd *ubd_dev = disk->private_data;
 	int err = 0;
 
diff --git a/arch/xtensa/platforms/iss/simdisk.c b/arch/xtensa/platforms/iss/simdisk.c
index f50caaa1c2496e..38f95f79a1270c 100644
--- a/arch/xtensa/platforms/iss/simdisk.c
+++ b/arch/xtensa/platforms/iss/simdisk.c
@@ -120,9 +120,9 @@ static void simdisk_submit_bio(struct bio *bio)
 	bio_endio(bio);
 }
 
-static int simdisk_open(struct block_device *bdev, fmode_t mode)
+static int simdisk_open(struct gendisk *disk, fmode_t mode)
 {
-	struct simdisk *dev = bdev->bd_disk->private_data;
+	struct simdisk *dev = disk->private_data;
 
 	spin_lock(&dev->lock);
 	++dev->users;
diff --git a/block/bdev.c b/block/bdev.c
index 981f6135795138..8a5fded303d4ed 100644
--- a/block/bdev.c
+++ b/block/bdev.c
@@ -652,7 +652,7 @@ static int blkdev_get_whole(struct block_device *bdev, fmode_t mode)
 	int ret;
 
 	if (disk->fops->open) {
-		ret = disk->fops->open(bdev, mode);
+		ret = disk->fops->open(disk, mode);
 		if (ret) {
 			/* avoid ghost partitions on a removed medium */
 			if (ret == -ENOMEDIUM &&
diff --git a/drivers/block/amiflop.c b/drivers/block/amiflop.c
index 6de12b311749a1..0cf2e58294be68 100644
--- a/drivers/block/amiflop.c
+++ b/drivers/block/amiflop.c
@@ -1654,10 +1654,10 @@ static void fd_probe(int dev)
  * /dev/PS0 etc), and disallows simultaneous access to the same
  * drive with different device numbers.
  */
-static int floppy_open(struct block_device *bdev, fmode_t mode)
+static int floppy_open(struct gendisk *disk, fmode_t mode)
 {
-	int drive = MINOR(bdev->bd_dev) & 3;
-	int system =  (MINOR(bdev->bd_dev) & 4) >> 2;
+	int drive = disk->first_minor & 3;
+	int system = (disk->first_minor & 4) >> 2;
 	int old_dev;
 	unsigned long flags;
 
@@ -1675,7 +1675,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 	}
 
 	if (mode & (FMODE_READ|FMODE_WRITE)) {
-		disk_check_media_change(bdev->bd_disk);
+		disk_check_media_change(disk);
 		if (mode & FMODE_WRITE) {
 			int wrprot;
 
diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index 128722cf6c3cad..4ca6bbb326d5de 100644
--- a/drivers/block/aoe/aoeblk.c
+++ b/drivers/block/aoe/aoeblk.c
@@ -204,9 +204,9 @@ aoedisk_rm_debugfs(struct aoedev *d)
 }
 
 static int
-aoeblk_open(struct block_device *bdev, fmode_t mode)
+aoeblk_open(struct gendisk *disk, fmode_t mode)
 {
-	struct aoedev *d = bdev->bd_disk->private_data;
+	struct aoedev *d = disk->private_data;
 	ulong flags;
 
 	if (!virt_addr_valid(d)) {
diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index da481ddbca90db..4febd52be78cfc 100644
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -447,7 +447,7 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
 static void fd_probe( int drive );
 static int fd_test_drive_present( int drive );
 static void config_types( void );
-static int floppy_open(struct block_device *bdev, fmode_t mode);
+static int floppy_open(struct gendisk *disk, fmode_t mode);
 static void floppy_release(struct gendisk *disk, fmode_t mode);
 
 /************************* End of Prototypes **************************/
@@ -1915,10 +1915,10 @@ static void __init config_types( void )
  * drive with different device numbers.
  */
 
-static int floppy_open(struct block_device *bdev, fmode_t mode)
+static int floppy_open(struct gendisk *disk, fmode_t mode)
 {
-	struct atari_floppy_struct *p = bdev->bd_disk->private_data;
-	int type  = MINOR(bdev->bd_dev) >> 2;
+	struct atari_floppy_struct *p = disk->private_data;
+	int type = disk->first_minor >> 2;
 
 	DPRINT(("fd_open: type=%d\n",type));
 	if (p->ref && p->type != type)
@@ -1938,8 +1938,8 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 		return 0;
 
 	if (mode & (FMODE_READ|FMODE_WRITE)) {
-		if (disk_check_media_change(bdev->bd_disk))
-			floppy_revalidate(bdev->bd_disk);
+		if (disk_check_media_change(disk))
+			floppy_revalidate(disk);
 		if (mode & FMODE_WRITE) {
 			if (p->wpstat) {
 				if (p->ref < 0)
@@ -1953,12 +1953,12 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 	return 0;
 }
 
-static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode)
+static int floppy_unlocked_open(struct gendisk *disk, fmode_t mode)
 {
 	int ret;
 
 	mutex_lock(&ataflop_mutex);
-	ret = floppy_open(bdev, mode);
+	ret = floppy_open(disk, mode);
 	mutex_unlock(&ataflop_mutex);
 
 	return ret;
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 54223f64610a05..8b6c19460f3425 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -49,7 +49,7 @@
 #include "drbd_debugfs.h"
 
 static DEFINE_MUTEX(drbd_main_mutex);
-static int drbd_open(struct block_device *bdev, fmode_t mode);
+static int drbd_open(struct gendisk *disk, fmode_t mode);
 static void drbd_release(struct gendisk *gd, fmode_t mode);
 static void md_sync_timer_fn(struct timer_list *t);
 static int w_bitmap_io(struct drbd_work *w, int unused);
@@ -1882,9 +1882,9 @@ int drbd_send_all(struct drbd_connection *connection, struct socket *sock, void
 	return 0;
 }
 
-static int drbd_open(struct block_device *bdev, fmode_t mode)
+static int drbd_open(struct gendisk *disk, fmode_t mode)
 {
-	struct drbd_device *device = bdev->bd_disk->private_data;
+	struct drbd_device *device = disk->private_data;
 	unsigned long flags;
 	int rv = 0;
 
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 3accafcbc95c85..ef3bbb7c185b56 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -402,7 +402,7 @@ static struct floppy_drive_struct drive_state[N_DRIVE];
 static struct floppy_write_errors write_errors[N_DRIVE];
 static struct timer_list motor_off_timer[N_DRIVE];
 static struct blk_mq_tag_set tag_sets[N_DRIVE];
-static struct block_device *opened_bdev[N_DRIVE];
+static struct gendisk *opened_disk[N_DRIVE];
 static DEFINE_MUTEX(open_lock);
 static struct floppy_raw_cmd *raw_cmd, default_raw_cmd;
 
@@ -3251,10 +3251,11 @@ static int set_geometry(unsigned int cmd, struct floppy_struct *g,
 			    floppy_type[type].size + 1;
 		process_fd_request();
 		for (cnt = 0; cnt < N_DRIVE; cnt++) {
-			struct block_device *bdev = opened_bdev[cnt];
-			if (!bdev || ITYPE(drive_state[cnt].fd_device) != type)
+			struct gendisk *disk = opened_disk[cnt];
+
+			if (!disk || ITYPE(drive_state[cnt].fd_device) != type)
 				continue;
-			__invalidate_device(bdev, true);
+			__invalidate_device(disk->part0, true);
 		}
 		mutex_unlock(&open_lock);
 	} else {
@@ -3973,7 +3974,7 @@ static void floppy_release(struct gendisk *disk, fmode_t mode)
 		drive_state[drive].fd_ref = 0;
 	}
 	if (!drive_state[drive].fd_ref)
-		opened_bdev[drive] = NULL;
+		opened_disk[drive] = NULL;
 	mutex_unlock(&open_lock);
 	mutex_unlock(&floppy_mutex);
 }
@@ -3983,9 +3984,9 @@ static void floppy_release(struct gendisk *disk, fmode_t mode)
  * /dev/PS0 etc), and disallows simultaneous access to the same
  * drive with different device numbers.
  */
-static int floppy_open(struct block_device *bdev, fmode_t mode)
+static int floppy_open(struct gendisk *disk, fmode_t mode)
 {
-	int drive = (long)bdev->bd_disk->private_data;
+	int drive = (long)disk->private_data;
 	int old_dev, new_dev;
 	int try;
 	int res = -EBUSY;
@@ -3994,7 +3995,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 	mutex_lock(&floppy_mutex);
 	mutex_lock(&open_lock);
 	old_dev = drive_state[drive].fd_device;
-	if (opened_bdev[drive] && opened_bdev[drive] != bdev)
+	if (opened_disk[drive] && opened_disk[drive] != disk)
 		goto out2;
 
 	if (!drive_state[drive].fd_ref && (drive_params[drive].flags & FD_BROKEN_DCL)) {
@@ -4004,7 +4005,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 
 	drive_state[drive].fd_ref++;
 
-	opened_bdev[drive] = bdev;
+	opened_disk[drive] = disk;
 
 	res = -ENXIO;
 
@@ -4038,7 +4039,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 		}
 	}
 
-	new_dev = MINOR(bdev->bd_dev);
+	new_dev = disk->first_minor;
 	drive_state[drive].fd_device = new_dev;
 	set_capacity(disks[drive][ITYPE(new_dev)], floppy_sizes[new_dev]);
 	if (old_dev != -1 && old_dev != new_dev) {
@@ -4054,8 +4055,8 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 			drive_state[drive].last_checked = 0;
 			clear_bit(FD_OPEN_SHOULD_FAIL_BIT,
 				  &drive_state[drive].flags);
-			if (disk_check_media_change(bdev->bd_disk))
-				floppy_revalidate(bdev->bd_disk);
+			if (disk_check_media_change(disk))
+				floppy_revalidate(disk);
 			if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags))
 				goto out;
 			if (test_bit(FD_OPEN_SHOULD_FAIL_BIT, &drive_state[drive].flags))
@@ -4073,7 +4074,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 	drive_state[drive].fd_ref--;
 
 	if (!drive_state[drive].fd_ref)
-		opened_bdev[drive] = NULL;
+		opened_disk[drive] = NULL;
 out2:
 	mutex_unlock(&open_lock);
 	mutex_unlock(&floppy_mutex);
@@ -4203,7 +4204,8 @@ static int floppy_revalidate(struct gendisk *disk)
 			drive_state[drive].generation++;
 		if (drive_no_geom(drive)) {
 			/* auto-sensing */
-			res = __floppy_read_block_0(opened_bdev[drive], drive);
+			res = __floppy_read_block_0(opened_disk[drive]->part0,
+						    drive);
 		} else {
 			if (cf)
 				poll_drive(false, FD_RAW_NEED_DISK);
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 65ecde3e2a5be8..7b4ee6ebaae2e6 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -1553,13 +1553,13 @@ static struct nbd_config *nbd_alloc_config(void)
 	return config;
 }
 
-static int nbd_open(struct block_device *bdev, fmode_t mode)
+static int nbd_open(struct gendisk *disk, fmode_t mode)
 {
 	struct nbd_device *nbd;
 	int ret = 0;
 
 	mutex_lock(&nbd_index_mutex);
-	nbd = bdev->bd_disk->private_data;
+	nbd = disk->private_data;
 	if (!nbd) {
 		ret = -ENXIO;
 		goto out;
@@ -1587,10 +1587,10 @@ static int nbd_open(struct block_device *bdev, fmode_t mode)
 		refcount_inc(&nbd->refs);
 		mutex_unlock(&nbd->config_lock);
 		if (max_part)
-			set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
+			set_bit(GD_NEED_PART_SCAN, &disk->state);
 	} else if (nbd_disconnected(nbd->config)) {
 		if (max_part)
-			set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
+			set_bit(GD_NEED_PART_SCAN, &disk->state);
 	}
 out:
 	mutex_unlock(&nbd_index_mutex);
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 377f8b34535294..8f02a1c2ede56d 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -2204,14 +2204,14 @@ static struct pktcdvd_device *pkt_find_dev_from_minor(unsigned int dev_minor)
 	return pkt_devs[dev_minor];
 }
 
-static int pkt_open(struct block_device *bdev, fmode_t mode)
+static int pkt_open(struct gendisk *disk, fmode_t mode)
 {
 	struct pktcdvd_device *pd = NULL;
 	int ret;
 
 	mutex_lock(&pktcdvd_mutex);
 	mutex_lock(&ctl_mutex);
-	pd = pkt_find_dev_from_minor(MINOR(bdev->bd_dev));
+	pd = pkt_find_dev_from_minor(disk->first_minor);
 	if (!pd) {
 		ret = -ENODEV;
 		goto out;
@@ -2233,7 +2233,7 @@ static int pkt_open(struct block_device *bdev, fmode_t mode)
 		 * needed here as well, since ext2 (among others) may change
 		 * the blocksize at mount time
 		 */
-		set_blocksize(bdev, CD_FRAMESIZE);
+		set_blocksize(disk->part0, CD_FRAMESIZE);
 	}
 
 	mutex_unlock(&ctl_mutex);
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 84ad3b17956f67..93231061db2f2b 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -660,9 +660,9 @@ static bool pending_result_dec(struct pending_result *pending, int *result)
 	return true;
 }
 
-static int rbd_open(struct block_device *bdev, fmode_t mode)
+static int rbd_open(struct gendisk *disk, fmode_t mode)
 {
-	struct rbd_device *rbd_dev = bdev->bd_disk->private_data;
+	struct rbd_device *rbd_dev = disk->private_data;
 	bool removing = false;
 
 	spin_lock_irq(&rbd_dev->lock);
diff --git a/drivers/block/rnbd/rnbd-clt.c b/drivers/block/rnbd/rnbd-clt.c
index 5eb8c7855970d1..8ec00f4caf6b4c 100644
--- a/drivers/block/rnbd/rnbd-clt.c
+++ b/drivers/block/rnbd/rnbd-clt.c
@@ -921,9 +921,9 @@ rnbd_clt_session *find_or_create_sess(const char *sessname, bool *first)
 	return sess;
 }
 
-static int rnbd_client_open(struct block_device *block_device, fmode_t mode)
+static int rnbd_client_open(struct gendisk *disk, fmode_t mode)
 {
-	struct rnbd_clt_dev *dev = block_device->bd_disk->private_data;
+	struct rnbd_clt_dev *dev = disk->private_data;
 
 	if (get_disk_ro(dev->gd) && (mode & FMODE_WRITE))
 		return -EPERM;
diff --git a/drivers/block/swim.c b/drivers/block/swim.c
index 105bc5fd1b8c62..7ec8554187f7d7 100644
--- a/drivers/block/swim.c
+++ b/drivers/block/swim.c
@@ -608,9 +608,9 @@ static void setup_medium(struct floppy_state *fs)
 	}
 }
 
-static int floppy_open(struct block_device *bdev, fmode_t mode)
+static int floppy_open(struct gendisk *disk, fmode_t mode)
 {
-	struct floppy_state *fs = bdev->bd_disk->private_data;
+	struct floppy_state *fs = disk->private_data;
 	struct swim __iomem *base = fs->swd->base;
 	int err;
 
@@ -640,7 +640,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 		return 0;
 
 	if (mode & (FMODE_READ|FMODE_WRITE)) {
-		if (disk_check_media_change(bdev->bd_disk) && fs->disk_in)
+		if (disk_check_media_change(disk) && fs->disk_in)
 			fs->ejected = 0;
 		if ((mode & FMODE_WRITE) && fs->write_protected) {
 			err = -EROFS;
@@ -659,12 +659,12 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 	return err;
 }
 
-static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode)
+static int floppy_unlocked_open(struct gendisk *disk, fmode_t mode)
 {
 	int ret;
 
 	mutex_lock(&swim_mutex);
-	ret = floppy_open(bdev, mode);
+	ret = floppy_open(disk, mode);
 	mutex_unlock(&swim_mutex);
 
 	return ret;
diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c
index 3d689ba312f568..c05a4e110d5275 100644
--- a/drivers/block/swim3.c
+++ b/drivers/block/swim3.c
@@ -248,7 +248,7 @@ static void release_drive(struct floppy_state *fs);
 static int fd_eject(struct floppy_state *fs);
 static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
 			unsigned int cmd, unsigned long param);
-static int floppy_open(struct block_device *bdev, fmode_t mode);
+static int floppy_open(struct gendisk *disk, fmode_t mode);
 static void floppy_release(struct gendisk *disk, fmode_t mode);
 static unsigned int floppy_check_events(struct gendisk *disk,
 					unsigned int clearing);
@@ -923,9 +923,9 @@ static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
 	return ret;
 }
 
-static int floppy_open(struct block_device *bdev, fmode_t mode)
+static int floppy_open(struct gendisk *disk, fmode_t mode)
 {
-	struct floppy_state *fs = bdev->bd_disk->private_data;
+	struct floppy_state *fs = disk->private_data;
 	struct swim3 __iomem *sw = fs->swim3;
 	int n, err = 0;
 
@@ -963,8 +963,8 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 
 	if (err == 0 && (mode & FMODE_NDELAY) == 0
 	    && (mode & (FMODE_READ|FMODE_WRITE))) {
-		if (disk_check_media_change(bdev->bd_disk))
-			floppy_revalidate(bdev->bd_disk);
+		if (disk_check_media_change(disk))
+			floppy_revalidate(disk);
 		if (fs->ejected)
 			err = -ENXIO;
 	}
diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c
index 222a0341913ffb..92c900ac2ebcb6 100644
--- a/drivers/block/ublk_drv.c
+++ b/drivers/block/ublk_drv.c
@@ -447,9 +447,9 @@ static void ublk_store_owner_uid_gid(unsigned int *owner_uid,
 	*owner_gid = from_kgid(&init_user_ns, gid);
 }
 
-static int ublk_open(struct block_device *bdev, fmode_t mode)
+static int ublk_open(struct gendisk *disk, fmode_t mode)
 {
-	struct ublk_device *ub = bdev->bd_disk->private_data;
+	struct ublk_device *ub = disk->private_data;
 
 	if (capable(CAP_SYS_ADMIN))
 		return 0;
diff --git a/drivers/block/z2ram.c b/drivers/block/z2ram.c
index c1e85f356e4dfb..a5575e012e291e 100644
--- a/drivers/block/z2ram.c
+++ b/drivers/block/z2ram.c
@@ -140,16 +140,14 @@ static void get_chipram(void)
 	return;
 }
 
-static int z2_open(struct block_device *bdev, fmode_t mode)
+static int z2_open(struct gendisk *disk, fmode_t mode)
 {
-	int device;
+	int device = disk->first_minor;
 	int max_z2_map = (Z2RAM_SIZE / Z2RAM_CHUNKSIZE) * sizeof(z2ram_map[0]);
 	int max_chip_map = (amiga_chip_size / Z2RAM_CHUNKSIZE) *
 	    sizeof(z2ram_map[0]);
 	int rc = -ENOMEM;
 
-	device = MINOR(bdev->bd_dev);
-
 	mutex_lock(&z2ram_mutex);
 	if (current_device != -1 && current_device != device) {
 		rc = -EBUSY;
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 0bc779446c6f8f..f5644c60604070 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -2097,19 +2097,16 @@ static ssize_t reset_store(struct device *dev,
 	return len;
 }
 
-static int zram_open(struct block_device *bdev, fmode_t mode)
+static int zram_open(struct gendisk *disk, fmode_t mode)
 {
-	int ret = 0;
-	struct zram *zram;
+	struct zram *zram = disk->private_data;
 
-	WARN_ON(!mutex_is_locked(&bdev->bd_disk->open_mutex));
+	WARN_ON(!mutex_is_locked(&disk->open_mutex));
 
-	zram = bdev->bd_disk->private_data;
 	/* zram was claimed to reset so open request fails */
 	if (zram->claim)
-		ret = -EBUSY;
-
-	return ret;
+		return -EBUSY;
+	return 0;
 }
 
 static const struct block_device_operations zram_devops = {
diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
index 3cb92df38ebeb8..d35dd717e9fca9 100644
--- a/drivers/cdrom/gdrom.c
+++ b/drivers/cdrom/gdrom.c
@@ -474,11 +474,11 @@ static const struct cdrom_device_ops gdrom_ops = {
 				  CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R,
 };
 
-static int gdrom_bdops_open(struct block_device *bdev, fmode_t mode)
+static int gdrom_bdops_open(struct gendisk *disk, fmode_t mode)
 {
 	int ret;
 
-	disk_check_media_change(bdev->bd_disk);
+	disk_check_media_change(disk);
 
 	mutex_lock(&gdrom_mutex);
 	ret = cdrom_open(gd.cd_info);
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index d84c09a73af803..6683f66e701136 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -732,9 +732,9 @@ static int prio_read(struct cache *ca, uint64_t bucket)
 
 /* Bcache device */
 
-static int open_dev(struct block_device *b, fmode_t mode)
+static int open_dev(struct gendisk *disk, fmode_t mode)
 {
-	struct bcache_device *d = b->bd_disk->private_data;
+	struct bcache_device *d = disk->private_data;
 
 	if (test_bit(BCACHE_DEV_CLOSING, &d->flags))
 		return -ENXIO;
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index d759f8bdb3df2f..06047a0ca4b315 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -310,13 +310,13 @@ int dm_deleting_md(struct mapped_device *md)
 	return test_bit(DMF_DELETING, &md->flags);
 }
 
-static int dm_blk_open(struct block_device *bdev, fmode_t mode)
+static int dm_blk_open(struct gendisk *disk, fmode_t mode)
 {
 	struct mapped_device *md;
 
 	spin_lock(&_minor_lock);
 
-	md = bdev->bd_disk->private_data;
+	md = disk->private_data;
 	if (!md)
 		goto out;
 
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 77046c91bea439..aba13830bdb556 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -7767,13 +7767,13 @@ static int md_set_read_only(struct block_device *bdev, bool ro)
 	return err;
 }
 
-static int md_open(struct block_device *bdev, fmode_t mode)
+static int md_open(struct gendisk *disk, fmode_t mode)
 {
 	struct mddev *mddev;
 	int err;
 
 	spin_lock(&all_mddevs_lock);
-	mddev = mddev_get(bdev->bd_disk->private_data);
+	mddev = mddev_get(disk->private_data);
 	spin_unlock(&all_mddevs_lock);
 	if (!mddev)
 		return -ENODEV;
@@ -7789,7 +7789,7 @@ static int md_open(struct block_device *bdev, fmode_t mode)
 	atomic_inc(&mddev->openers);
 	mutex_unlock(&mddev->open_mutex);
 
-	disk_check_media_change(bdev->bd_disk);
+	disk_check_media_change(disk);
 	return 0;
 
 out_unlock:
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index 00c33edb9fb94e..fe217658705d1f 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -357,9 +357,9 @@ static const struct attribute_group *mmc_disk_attr_groups[] = {
 	NULL,
 };
 
-static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
+static int mmc_blk_open(struct gendisk *disk, fmode_t mode)
 {
-	struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
+	struct mmc_blk_data *md = mmc_blk_get(disk);
 	int ret = -ENXIO;
 
 	mutex_lock(&block_mutex);
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index 60b222799871e8..95f3ee6bde8440 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -182,9 +182,9 @@ static blk_status_t mtd_queue_rq(struct blk_mq_hw_ctx *hctx,
 	return BLK_STS_OK;
 }
 
-static int blktrans_open(struct block_device *bdev, fmode_t mode)
+static int blktrans_open(struct gendisk *disk, fmode_t mode)
 {
-	struct mtd_blktrans_dev *dev = bdev->bd_disk->private_data;
+	struct mtd_blktrans_dev *dev = disk->private_data;
 	int ret = 0;
 
 	kref_get(&dev->ref);
diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c
index 3711d7f746003d..2f3442963919fc 100644
--- a/drivers/mtd/ubi/block.c
+++ b/drivers/mtd/ubi/block.c
@@ -227,9 +227,9 @@ static blk_status_t ubiblock_read(struct request *req)
 	return BLK_STS_OK;
 }
 
-static int ubiblock_open(struct block_device *bdev, fmode_t mode)
+static int ubiblock_open(struct gendisk *disk, fmode_t mode)
 {
-	struct ubiblock *dev = bdev->bd_disk->private_data;
+	struct ubiblock *dev = disk->private_data;
 	int ret;
 
 	mutex_lock(&dev->dev_mutex);
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index ccb6eb1282f82d..b1c8af5d9376ad 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1591,9 +1591,9 @@ static void nvme_ns_release(struct nvme_ns *ns)
 	nvme_put_ns(ns);
 }
 
-static int nvme_open(struct block_device *bdev, fmode_t mode)
+static int nvme_open(struct gendisk *disk, fmode_t mode)
 {
-	return nvme_ns_open(bdev->bd_disk->private_data);
+	return nvme_ns_open(disk->private_data);
 }
 
 static void nvme_release(struct gendisk *disk, fmode_t mode)
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 9171452e2f6d4e..e8d5d62efa6d7c 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -402,9 +402,9 @@ static void nvme_ns_head_submit_bio(struct bio *bio)
 	srcu_read_unlock(&head->srcu, srcu_idx);
 }
 
-static int nvme_ns_head_open(struct block_device *bdev, fmode_t mode)
+static int nvme_ns_head_open(struct gendisk *disk, fmode_t mode)
 {
-	if (!nvme_tryget_ns_head(bdev->bd_disk->private_data))
+	if (!nvme_tryget_ns_head(disk->private_data))
 		return -ENXIO;
 	return 0;
 }
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 9fbfce735d5650..e445b5fbd7fd27 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -3234,12 +3234,12 @@ struct blk_mq_ops dasd_mq_ops = {
 	.exit_hctx = dasd_exit_hctx,
 };
 
-static int dasd_open(struct block_device *bdev, fmode_t mode)
+static int dasd_open(struct gendisk *disk, fmode_t mode)
 {
 	struct dasd_device *base;
 	int rc;
 
-	base = dasd_device_from_gendisk(bdev->bd_disk);
+	base = dasd_device_from_gendisk(disk);
 	if (!base)
 		return -ENODEV;
 
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index c09f2e053bf863..6150d20b584300 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -28,7 +28,7 @@
 #define DCSSBLK_PARM_LEN 400
 #define DCSS_BUS_ID_SIZE 20
 
-static int dcssblk_open(struct block_device *bdev, fmode_t mode);
+static int dcssblk_open(struct gendisk *disk, fmode_t mode);
 static void dcssblk_release(struct gendisk *disk, fmode_t mode);
 static void dcssblk_submit_bio(struct bio *bio);
 static long dcssblk_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff,
@@ -809,12 +809,11 @@ dcssblk_remove_store(struct device *dev, struct device_attribute *attr, const ch
 }
 
 static int
-dcssblk_open(struct block_device *bdev, fmode_t mode)
+dcssblk_open(struct gendisk *disk, fmode_t mode)
 {
-	struct dcssblk_dev_info *dev_info;
+	struct dcssblk_dev_info *dev_info = disk->private_data;
 	int rc;
 
-	dev_info = bdev->bd_disk->private_data;
 	if (NULL == dev_info) {
 		rc = -ENODEV;
 		goto out;
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index aab649d5bad3f8..c31a675db015e8 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1297,7 +1297,7 @@ static bool sd_need_revalidate(struct gendisk *disk, struct scsi_disk *sdkp)
 
 /**
  *	sd_open - open a scsi disk device
- *	@bdev: Block device of the scsi disk to open
+ *	@disk: disk to open
  *	@mode: FMODE_* mask
  *
  *	Returns 0 if successful. Returns a negated errno value in case 
@@ -1308,11 +1308,11 @@ static bool sd_need_revalidate(struct gendisk *disk, struct scsi_disk *sdkp)
  *	In the latter case @inode and @filp carry an abridged amount
  *	of information as noted above.
  *
- *	Locking: called with bdev->bd_disk->open_mutex held.
+ *	Locking: called with disk->open_mutex held.
  **/
-static int sd_open(struct block_device *bdev, fmode_t mode)
+static int sd_open(struct gendisk *disk, fmode_t mode)
 {
-	struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
+	struct scsi_disk *sdkp = scsi_disk(disk);
 	struct scsi_device *sdev = sdkp->device;
 	int retval;
 
@@ -1329,8 +1329,8 @@ static int sd_open(struct block_device *bdev, fmode_t mode)
 	if (!scsi_block_when_processing_errors(sdev))
 		goto error_out;
 
-	if (sd_need_revalidate(bdev->bd_disk, sdkp))
-		sd_revalidate_disk(bdev->bd_disk);
+	if (sd_need_revalidate(disk, sdkp))
+		sd_revalidate_disk(disk);
 
 	/*
 	 * If the drive is empty, just let the open fail.
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 1592e6e10c7452..3ff3a2f9604774 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -484,9 +484,9 @@ static void sr_revalidate_disk(struct scsi_cd *cd)
 	get_sectorsize(cd);
 }
 
-static int sr_block_open(struct block_device *bdev, fmode_t mode)
+static int sr_block_open(struct gendisk *disk, fmode_t mode)
 {
-	struct scsi_cd *cd = scsi_cd(bdev->bd_disk);
+	struct scsi_cd *cd = scsi_cd(disk);
 	struct scsi_device *sdev = cd->device;
 	int ret;
 
@@ -494,7 +494,7 @@ static int sr_block_open(struct block_device *bdev, fmode_t mode)
 		return -ENXIO;
 
 	scsi_autopm_get_device(sdev);
-	if (disk_check_media_change(bdev->bd_disk))
+	if (disk_check_media_change(disk))
 		sr_revalidate_disk(cd);
 
 	mutex_lock(&cd->lock);
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index a1688eba7e5e9a..1366eea881860e 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1386,7 +1386,7 @@ struct block_device_operations {
 	void (*submit_bio)(struct bio *bio);
 	int (*poll_bio)(struct bio *bio, struct io_comp_batch *iob,
 			unsigned int flags);
-	int (*open) (struct block_device *, fmode_t);
+	int (*open)(struct gendisk *disk, fmode_t mode);
 	void (*release) (struct gendisk *, fmode_t);
 	int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
 	int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
-- 
2.39.2

Re: [PATCH 09/31] block: pass a gendisk to ->open

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:28AM +0200, Christoph Hellwig wrote:
> ->open is only called on the whole device.  Make that explicit by

Ok, that answers my question in
https://lore.kernel.org/all/20230607-chefsessel-angeordnet-269f0596f9b3@brauner

> passing a gendisk instead of the block_device.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

> diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
> index a1688eba7e5e9a..1366eea881860e 100644
> --- a/include/linux/blkdev.h
> +++ b/include/linux/blkdev.h
> @@ -1386,7 +1386,7 @@ struct block_device_operations {
>  	void (*submit_bio)(struct bio *bio);
>  	int (*poll_bio)(struct bio *bio, struct io_comp_batch *iob,
>  			unsigned int flags);
> -	int (*open) (struct block_device *, fmode_t);
> +	int (*open)(struct gendisk *disk, fmode_t mode);
>  	void (*release) (struct gendisk *, fmode_t);
>  	int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
>  	int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);

Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

(I didn't bother going through all the individual conversions.)

Re: [PATCH 09/31] block: pass a gendisk to ->open

[Jinpu Wang]

On Tue, Jun 6, 2023 at 9:40 AM Christoph Hellwig <hch@lst.de> wrote:
>
> ->open is only called on the whole device.  Make that explicit by
> passing a gendisk instead of the block_device.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  arch/um/drivers/ubd_kern.c          |  5 ++---
>  arch/xtensa/platforms/iss/simdisk.c |  4 ++--
>  block/bdev.c                        |  2 +-
>  drivers/block/amiflop.c             |  8 ++++----
>  drivers/block/aoe/aoeblk.c          |  4 ++--
>  drivers/block/ataflop.c             | 16 +++++++--------
>  drivers/block/drbd/drbd_main.c      |  6 +++---
>  drivers/block/floppy.c              | 30 +++++++++++++++--------------
>  drivers/block/nbd.c                 |  8 ++++----
>  drivers/block/pktcdvd.c             |  6 +++---
>  drivers/block/rbd.c                 |  4 ++--
>  drivers/block/rnbd/rnbd-clt.c       |  4 ++--
Acked-by: Jack Wang <jinpu.wang@ionos.com> # for rnbd

Re: [PATCH 09/31] block: pass a gendisk to ->open

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> ->open is only called on the whole device.  Make that explicit by
> passing a gendisk instead of the block_device.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   arch/um/drivers/ubd_kern.c          |  5 ++---
>   arch/xtensa/platforms/iss/simdisk.c |  4 ++--
>   block/bdev.c                        |  2 +-
>   drivers/block/amiflop.c             |  8 ++++----
>   drivers/block/aoe/aoeblk.c          |  4 ++--
>   drivers/block/ataflop.c             | 16 +++++++--------
>   drivers/block/drbd/drbd_main.c      |  6 +++---
>   drivers/block/floppy.c              | 30 +++++++++++++++--------------
>   drivers/block/nbd.c                 |  8 ++++----
>   drivers/block/pktcdvd.c             |  6 +++---
>   drivers/block/rbd.c                 |  4 ++--
>   drivers/block/rnbd/rnbd-clt.c       |  4 ++--
>   drivers/block/swim.c                | 10 +++++-----
>   drivers/block/swim3.c               | 10 +++++-----
>   drivers/block/ublk_drv.c            |  4 ++--
>   drivers/block/z2ram.c               |  6 ++----
>   drivers/block/zram/zram_drv.c       | 13 +++++--------
>   drivers/cdrom/gdrom.c               |  4 ++--
>   drivers/md/bcache/super.c           |  4 ++--
>   drivers/md/dm.c                     |  4 ++--
>   drivers/md/md.c                     |  6 +++---
>   drivers/mmc/core/block.c            |  4 ++--
>   drivers/mtd/mtd_blkdevs.c           |  4 ++--
>   drivers/mtd/ubi/block.c             |  4 ++--
>   drivers/nvme/host/core.c            |  4 ++--
>   drivers/nvme/host/multipath.c       |  4 ++--
>   drivers/s390/block/dasd.c           |  4 ++--
>   drivers/s390/block/dcssblk.c        |  7 +++----
>   drivers/scsi/sd.c                   | 12 ++++++------
>   drivers/scsi/sr.c                   |  6 +++---
>   include/linux/blkdev.h              |  2 +-
>   31 files changed, 102 insertions(+), 107 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

[PATCH 10/31] block: remove the unused mode argument to ->release

[Christoph Hellwig]

The mode argument to the ->release block_device_operation is never used,
so remove it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 arch/um/drivers/ubd_kern.c          |  4 ++--
 arch/xtensa/platforms/iss/simdisk.c |  2 +-
 block/bdev.c                        | 14 +++++++-------
 drivers/block/amiflop.c             |  2 +-
 drivers/block/aoe/aoeblk.c          |  2 +-
 drivers/block/ataflop.c             |  4 ++--
 drivers/block/drbd/drbd_main.c      |  4 ++--
 drivers/block/floppy.c              |  2 +-
 drivers/block/loop.c                |  2 +-
 drivers/block/nbd.c                 |  2 +-
 drivers/block/pktcdvd.c             |  4 ++--
 drivers/block/rbd.c                 |  2 +-
 drivers/block/rnbd/rnbd-clt.c       |  2 +-
 drivers/block/swim.c                |  2 +-
 drivers/block/swim3.c               |  3 +--
 drivers/block/z2ram.c               |  2 +-
 drivers/cdrom/gdrom.c               |  2 +-
 drivers/md/bcache/super.c           |  2 +-
 drivers/md/dm.c                     |  2 +-
 drivers/md/md.c                     |  2 +-
 drivers/mmc/core/block.c            |  2 +-
 drivers/mtd/mtd_blkdevs.c           |  2 +-
 drivers/mtd/ubi/block.c             |  2 +-
 drivers/nvme/host/core.c            |  2 +-
 drivers/nvme/host/multipath.c       |  2 +-
 drivers/s390/block/dasd.c           |  2 +-
 drivers/s390/block/dcssblk.c        |  4 ++--
 drivers/scsi/sd.c                   |  3 +--
 drivers/scsi/sr.c                   |  2 +-
 include/linux/blkdev.h              |  2 +-
 30 files changed, 41 insertions(+), 43 deletions(-)

diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 6b831f82881bc4..8b79554968addb 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -109,7 +109,7 @@ static DEFINE_MUTEX(ubd_lock);
 static DEFINE_MUTEX(ubd_mutex); /* replaces BKL, might not be needed */
 
 static int ubd_open(struct gendisk *disk, fmode_t mode);
-static void ubd_release(struct gendisk *disk, fmode_t mode);
+static void ubd_release(struct gendisk *disk);
 static int ubd_ioctl(struct block_device *bdev, fmode_t mode,
 		     unsigned int cmd, unsigned long arg);
 static int ubd_getgeo(struct block_device *bdev, struct hd_geometry *geo);
@@ -1182,7 +1182,7 @@ static int ubd_open(struct gendisk *disk, fmode_t mode)
 	return err;
 }
 
-static void ubd_release(struct gendisk *disk, fmode_t mode)
+static void ubd_release(struct gendisk *disk)
 {
 	struct ubd *ubd_dev = disk->private_data;
 
diff --git a/arch/xtensa/platforms/iss/simdisk.c b/arch/xtensa/platforms/iss/simdisk.c
index 38f95f79a1270c..2ad9da3de0d90f 100644
--- a/arch/xtensa/platforms/iss/simdisk.c
+++ b/arch/xtensa/platforms/iss/simdisk.c
@@ -130,7 +130,7 @@ static int simdisk_open(struct gendisk *disk, fmode_t mode)
 	return 0;
 }
 
-static void simdisk_release(struct gendisk *disk, fmode_t mode)
+static void simdisk_release(struct gendisk *disk)
 {
 	struct simdisk *dev = disk->private_data;
 	spin_lock(&dev->lock);
diff --git a/block/bdev.c b/block/bdev.c
index 8a5fded303d4ed..2c6888ceb3784a 100644
--- a/block/bdev.c
+++ b/block/bdev.c
@@ -670,12 +670,12 @@ static int blkdev_get_whole(struct block_device *bdev, fmode_t mode)
 	return 0;
 }
 
-static void blkdev_put_whole(struct block_device *bdev, fmode_t mode)
+static void blkdev_put_whole(struct block_device *bdev)
 {
 	if (atomic_dec_and_test(&bdev->bd_openers))
 		blkdev_flush_mapping(bdev);
 	if (bdev->bd_disk->fops->release)
-		bdev->bd_disk->fops->release(bdev->bd_disk, mode);
+		bdev->bd_disk->fops->release(bdev->bd_disk);
 }
 
 static int blkdev_get_part(struct block_device *part, fmode_t mode)
@@ -699,11 +699,11 @@ static int blkdev_get_part(struct block_device *part, fmode_t mode)
 	return 0;
 
 out_blkdev_put:
-	blkdev_put_whole(bdev_whole(part), mode);
+	blkdev_put_whole(bdev_whole(part));
 	return ret;
 }
 
-static void blkdev_put_part(struct block_device *part, fmode_t mode)
+static void blkdev_put_part(struct block_device *part)
 {
 	struct block_device *whole = bdev_whole(part);
 
@@ -711,7 +711,7 @@ static void blkdev_put_part(struct block_device *part, fmode_t mode)
 		blkdev_flush_mapping(part);
 		whole->bd_disk->open_partitions--;
 	}
-	blkdev_put_whole(whole, mode);
+	blkdev_put_whole(whole);
 }
 
 struct block_device *blkdev_get_no_open(dev_t dev)
@@ -903,9 +903,9 @@ void blkdev_put(struct block_device *bdev, fmode_t mode)
 	disk_flush_events(disk, DISK_EVENT_MEDIA_CHANGE);
 
 	if (bdev_is_partition(bdev))
-		blkdev_put_part(bdev, mode);
+		blkdev_put_part(bdev);
 	else
-		blkdev_put_whole(bdev, mode);
+		blkdev_put_whole(bdev);
 	mutex_unlock(&disk->open_mutex);
 
 	module_put(disk->fops->owner);
diff --git a/drivers/block/amiflop.c b/drivers/block/amiflop.c
index 0cf2e58294be68..9a0e9dc74a8c57 100644
--- a/drivers/block/amiflop.c
+++ b/drivers/block/amiflop.c
@@ -1709,7 +1709,7 @@ static int floppy_open(struct gendisk *disk, fmode_t mode)
 	return 0;
 }
 
-static void floppy_release(struct gendisk *disk, fmode_t mode)
+static void floppy_release(struct gendisk *disk)
 {
 	struct amiga_floppy_struct *p = disk->private_data;
 	int drive = p - unit;
diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index 4ca6bbb326d5de..c3a39e02ab9571 100644
--- a/drivers/block/aoe/aoeblk.c
+++ b/drivers/block/aoe/aoeblk.c
@@ -232,7 +232,7 @@ aoeblk_open(struct gendisk *disk, fmode_t mode)
 }
 
 static void
-aoeblk_release(struct gendisk *disk, fmode_t mode)
+aoeblk_release(struct gendisk *disk)
 {
 	struct aoedev *d = disk->private_data;
 	ulong flags;
diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index 4febd52be78cfc..66a3242bb062c3 100644
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -448,7 +448,7 @@ static void fd_probe( int drive );
 static int fd_test_drive_present( int drive );
 static void config_types( void );
 static int floppy_open(struct gendisk *disk, fmode_t mode);
-static void floppy_release(struct gendisk *disk, fmode_t mode);
+static void floppy_release(struct gendisk *disk);
 
 /************************* End of Prototypes **************************/
 
@@ -1964,7 +1964,7 @@ static int floppy_unlocked_open(struct gendisk *disk, fmode_t mode)
 	return ret;
 }
 
-static void floppy_release(struct gendisk *disk, fmode_t mode)
+static void floppy_release(struct gendisk *disk)
 {
 	struct atari_floppy_struct *p = disk->private_data;
 	mutex_lock(&ataflop_mutex);
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 8b6c19460f3425..7f3d7ca6ce6bcf 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -50,7 +50,7 @@
 
 static DEFINE_MUTEX(drbd_main_mutex);
 static int drbd_open(struct gendisk *disk, fmode_t mode);
-static void drbd_release(struct gendisk *gd, fmode_t mode);
+static void drbd_release(struct gendisk *gd);
 static void md_sync_timer_fn(struct timer_list *t);
 static int w_bitmap_io(struct drbd_work *w, int unused);
 
@@ -1908,7 +1908,7 @@ static int drbd_open(struct gendisk *disk, fmode_t mode)
 	return rv;
 }
 
-static void drbd_release(struct gendisk *gd, fmode_t mode)
+static void drbd_release(struct gendisk *gd)
 {
 	struct drbd_device *device = gd->private_data;
 	mutex_lock(&drbd_main_mutex);
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index ef3bbb7c185b56..d79fac288a73dc 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -3963,7 +3963,7 @@ static void __init config_types(void)
 		pr_cont("\n");
 }
 
-static void floppy_release(struct gendisk *disk, fmode_t mode)
+static void floppy_release(struct gendisk *disk)
 {
 	int drive = (long)disk->private_data;
 
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index a73c857f5bfed0..ca40d24572aea6 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1727,7 +1727,7 @@ static int lo_compat_ioctl(struct block_device *bdev, fmode_t mode,
 }
 #endif
 
-static void lo_release(struct gendisk *disk, fmode_t mode)
+static void lo_release(struct gendisk *disk)
 {
 	struct loop_device *lo = disk->private_data;
 
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 7b4ee6ebaae2e6..5a02fd6b3e7e95 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -1597,7 +1597,7 @@ static int nbd_open(struct gendisk *disk, fmode_t mode)
 	return ret;
 }
 
-static void nbd_release(struct gendisk *disk, fmode_t mode)
+static void nbd_release(struct gendisk *disk)
 {
 	struct nbd_device *nbd = disk->private_data;
 
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 8f02a1c2ede56d..fe0084bbb11f7c 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -2248,7 +2248,7 @@ static int pkt_open(struct gendisk *disk, fmode_t mode)
 	return ret;
 }
 
-static void pkt_close(struct gendisk *disk, fmode_t mode)
+static void pkt_release(struct gendisk *disk)
 {
 	struct pktcdvd_device *pd = disk->private_data;
 
@@ -2632,7 +2632,7 @@ static const struct block_device_operations pktcdvd_ops = {
 	.owner =		THIS_MODULE,
 	.submit_bio =		pkt_submit_bio,
 	.open =			pkt_open,
-	.release =		pkt_close,
+	.release =		pkt_release,
 	.ioctl =		pkt_ioctl,
 	.compat_ioctl =		blkdev_compat_ptr_ioctl,
 	.check_events =		pkt_check_events,
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 93231061db2f2b..5215eff94fe94f 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -679,7 +679,7 @@ static int rbd_open(struct gendisk *disk, fmode_t mode)
 	return 0;
 }
 
-static void rbd_release(struct gendisk *disk, fmode_t mode)
+static void rbd_release(struct gendisk *disk)
 {
 	struct rbd_device *rbd_dev = disk->private_data;
 	unsigned long open_count_before;
diff --git a/drivers/block/rnbd/rnbd-clt.c b/drivers/block/rnbd/rnbd-clt.c
index 8ec00f4caf6b4c..d5261d36d78630 100644
--- a/drivers/block/rnbd/rnbd-clt.c
+++ b/drivers/block/rnbd/rnbd-clt.c
@@ -935,7 +935,7 @@ static int rnbd_client_open(struct gendisk *disk, fmode_t mode)
 	return 0;
 }
 
-static void rnbd_client_release(struct gendisk *gen, fmode_t mode)
+static void rnbd_client_release(struct gendisk *gen)
 {
 	struct rnbd_clt_dev *dev = gen->private_data;
 
diff --git a/drivers/block/swim.c b/drivers/block/swim.c
index 7ec8554187f7d7..a629b38dec660a 100644
--- a/drivers/block/swim.c
+++ b/drivers/block/swim.c
@@ -670,7 +670,7 @@ static int floppy_unlocked_open(struct gendisk *disk, fmode_t mode)
 	return ret;
 }
 
-static void floppy_release(struct gendisk *disk, fmode_t mode)
+static void floppy_release(struct gendisk *disk)
 {
 	struct floppy_state *fs = disk->private_data;
 	struct swim __iomem *base = fs->swd->base;
diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c
index c05a4e110d5275..b696deff3d8ba1 100644
--- a/drivers/block/swim3.c
+++ b/drivers/block/swim3.c
@@ -249,7 +249,6 @@ static int fd_eject(struct floppy_state *fs);
 static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
 			unsigned int cmd, unsigned long param);
 static int floppy_open(struct gendisk *disk, fmode_t mode);
-static void floppy_release(struct gendisk *disk, fmode_t mode);
 static unsigned int floppy_check_events(struct gendisk *disk,
 					unsigned int clearing);
 static int floppy_revalidate(struct gendisk *disk);
@@ -1004,7 +1003,7 @@ static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode)
 	return ret;
 }
 
-static void floppy_release(struct gendisk *disk, fmode_t mode)
+static void floppy_release(struct gendisk *disk)
 {
 	struct floppy_state *fs = disk->private_data;
 	struct swim3 __iomem *sw = fs->swim3;
diff --git a/drivers/block/z2ram.c b/drivers/block/z2ram.c
index a5575e012e291e..a2e41cc084ca3a 100644
--- a/drivers/block/z2ram.c
+++ b/drivers/block/z2ram.c
@@ -288,7 +288,7 @@ static int z2_open(struct gendisk *disk, fmode_t mode)
 	return rc;
 }
 
-static void z2_release(struct gendisk *disk, fmode_t mode)
+static void z2_release(struct gendisk *disk)
 {
 	mutex_lock(&z2ram_mutex);
 	if (current_device == -1) {
diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
index d35dd717e9fca9..dac148d4d1feda 100644
--- a/drivers/cdrom/gdrom.c
+++ b/drivers/cdrom/gdrom.c
@@ -486,7 +486,7 @@ static int gdrom_bdops_open(struct gendisk *disk, fmode_t mode)
 	return ret;
 }
 
-static void gdrom_bdops_release(struct gendisk *disk, fmode_t mode)
+static void gdrom_bdops_release(struct gendisk *disk)
 {
 	mutex_lock(&gdrom_mutex);
 	cdrom_release(gd.cd_info, mode);
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 6683f66e701136..94b91c45c9e2a9 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -743,7 +743,7 @@ static int open_dev(struct gendisk *disk, fmode_t mode)
 	return 0;
 }
 
-static void release_dev(struct gendisk *b, fmode_t mode)
+static void release_dev(struct gendisk *b)
 {
 	struct bcache_device *d = b->private_data;
 
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 06047a0ca4b315..246b8f028a98f4 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -334,7 +334,7 @@ static int dm_blk_open(struct gendisk *disk, fmode_t mode)
 	return md ? 0 : -ENXIO;
 }
 
-static void dm_blk_close(struct gendisk *disk, fmode_t mode)
+static void dm_blk_close(struct gendisk *disk)
 {
 	struct mapped_device *md;
 
diff --git a/drivers/md/md.c b/drivers/md/md.c
index aba13830bdb556..159197dd7b6de1 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -7799,7 +7799,7 @@ static int md_open(struct gendisk *disk, fmode_t mode)
 	return err;
 }
 
-static void md_release(struct gendisk *disk, fmode_t mode)
+static void md_release(struct gendisk *disk)
 {
 	struct mddev *mddev = disk->private_data;
 
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index fe217658705d1f..b16eedf22d4e26 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -375,7 +375,7 @@ static int mmc_blk_open(struct gendisk *disk, fmode_t mode)
 	return ret;
 }
 
-static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
+static void mmc_blk_release(struct gendisk *disk)
 {
 	struct mmc_blk_data *md = disk->private_data;
 
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index 95f3ee6bde8440..f0bb09fde95e3a 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -225,7 +225,7 @@ static int blktrans_open(struct gendisk *disk, fmode_t mode)
 	return ret;
 }
 
-static void blktrans_release(struct gendisk *disk, fmode_t mode)
+static void blktrans_release(struct gendisk *disk)
 {
 	struct mtd_blktrans_dev *dev = disk->private_data;
 
diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c
index 2f3442963919fc..e85fb9de0b7004 100644
--- a/drivers/mtd/ubi/block.c
+++ b/drivers/mtd/ubi/block.c
@@ -270,7 +270,7 @@ static int ubiblock_open(struct gendisk *disk, fmode_t mode)
 	return ret;
 }
 
-static void ubiblock_release(struct gendisk *gd, fmode_t mode)
+static void ubiblock_release(struct gendisk *gd)
 {
 	struct ubiblock *dev = gd->private_data;
 
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index b1c8af5d9376ad..fd7f8e6d66fda6 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1596,7 +1596,7 @@ static int nvme_open(struct gendisk *disk, fmode_t mode)
 	return nvme_ns_open(disk->private_data);
 }
 
-static void nvme_release(struct gendisk *disk, fmode_t mode)
+static void nvme_release(struct gendisk *disk)
 {
 	nvme_ns_release(disk->private_data);
 }
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index e8d5d62efa6d7c..698c0e70bcfa5b 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -409,7 +409,7 @@ static int nvme_ns_head_open(struct gendisk *disk, fmode_t mode)
 	return 0;
 }
 
-static void nvme_ns_head_release(struct gendisk *disk, fmode_t mode)
+static void nvme_ns_head_release(struct gendisk *disk)
 {
 	nvme_put_ns_head(disk->private_data);
 }
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index e445b5fbd7fd27..19295b2df470c8 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -3287,7 +3287,7 @@ static int dasd_open(struct gendisk *disk, fmode_t mode)
 	return rc;
 }
 
-static void dasd_release(struct gendisk *disk, fmode_t mode)
+static void dasd_release(struct gendisk *disk)
 {
 	struct dasd_device *base = dasd_device_from_gendisk(disk);
 	if (base) {
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 6150d20b584300..5aee3106bfda84 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -29,7 +29,7 @@
 #define DCSS_BUS_ID_SIZE 20
 
 static int dcssblk_open(struct gendisk *disk, fmode_t mode);
-static void dcssblk_release(struct gendisk *disk, fmode_t mode);
+static void dcssblk_release(struct gendisk *disk);
 static void dcssblk_submit_bio(struct bio *bio);
 static long dcssblk_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff,
 		long nr_pages, enum dax_access_mode mode, void **kaddr,
@@ -825,7 +825,7 @@ dcssblk_open(struct gendisk *disk, fmode_t mode)
 }
 
 static void
-dcssblk_release(struct gendisk *disk, fmode_t mode)
+dcssblk_release(struct gendisk *disk)
 {
 	struct dcssblk_dev_info *dev_info = disk->private_data;
 	struct segment_info *entry;
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index c31a675db015e8..c67c84f6ba6178 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1373,7 +1373,6 @@ static int sd_open(struct gendisk *disk, fmode_t mode)
  *	sd_release - invoked when the (last) close(2) is called on this
  *	scsi disk.
  *	@disk: disk to release
- *	@mode: FMODE_* mask
  *
  *	Returns 0. 
  *
@@ -1382,7 +1381,7 @@ static int sd_open(struct gendisk *disk, fmode_t mode)
  *
  *	Locking: called with bdev->bd_disk->open_mutex held.
  **/
-static void sd_release(struct gendisk *disk, fmode_t mode)
+static void sd_release(struct gendisk *disk)
 {
 	struct scsi_disk *sdkp = scsi_disk(disk);
 	struct scsi_device *sdev = sdkp->device;
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 3ff3a2f9604774..55082acb59bcaa 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -507,7 +507,7 @@ static int sr_block_open(struct gendisk *disk, fmode_t mode)
 	return ret;
 }
 
-static void sr_block_release(struct gendisk *disk, fmode_t mode)
+static void sr_block_release(struct gendisk *disk)
 {
 	struct scsi_cd *cd = scsi_cd(disk);
 
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 1366eea881860e..25bdd0cc74dce4 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1387,7 +1387,7 @@ struct block_device_operations {
 	int (*poll_bio)(struct bio *bio, struct io_comp_batch *iob,
 			unsigned int flags);
 	int (*open)(struct gendisk *disk, fmode_t mode);
-	void (*release) (struct gendisk *, fmode_t);
+	void (*release)(struct gendisk *disk);
 	int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
 	int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
 	unsigned int (*check_events) (struct gendisk *disk,
-- 
2.39.2

Re: [PATCH 10/31] block: remove the unused mode argument to ->release

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:29AM +0200, Christoph Hellwig wrote:
> The mode argument to the ->release block_device_operation is never used,
> so remove it.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Good cleanup. Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 10/31] block: remove the unused mode argument to ->release

[Jinpu Wang]

On Tue, Jun 6, 2023 at 9:40 AM Christoph Hellwig <hch@lst.de> wrote:
>
> The mode argument to the ->release block_device_operation is never used,
> so remove it.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  arch/um/drivers/ubd_kern.c          |  4 ++--
>  arch/xtensa/platforms/iss/simdisk.c |  2 +-
>  block/bdev.c                        | 14 +++++++-------
>  drivers/block/amiflop.c             |  2 +-
>  drivers/block/aoe/aoeblk.c          |  2 +-
>  drivers/block/ataflop.c             |  4 ++--
>  drivers/block/drbd/drbd_main.c      |  4 ++--
>  drivers/block/floppy.c              |  2 +-
>  drivers/block/loop.c                |  2 +-
>  drivers/block/nbd.c                 |  2 +-
>  drivers/block/pktcdvd.c             |  4 ++--
>  drivers/block/rbd.c                 |  2 +-
>  drivers/block/rnbd/rnbd-clt.c       |  2 +-
Acked-by: Jack Wang <jinpu.wang@ionos.com> # for rnbd

Re: [PATCH 10/31] block: remove the unused mode argument to ->release

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> The mode argument to the ->release block_device_operation is never used,
> so remove it.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   arch/um/drivers/ubd_kern.c          |  4 ++--
>   arch/xtensa/platforms/iss/simdisk.c |  2 +-
>   block/bdev.c                        | 14 +++++++-------
>   drivers/block/amiflop.c             |  2 +-
>   drivers/block/aoe/aoeblk.c          |  2 +-
>   drivers/block/ataflop.c             |  4 ++--
>   drivers/block/drbd/drbd_main.c      |  4 ++--
>   drivers/block/floppy.c              |  2 +-
>   drivers/block/loop.c                |  2 +-
>   drivers/block/nbd.c                 |  2 +-
>   drivers/block/pktcdvd.c             |  4 ++--
>   drivers/block/rbd.c                 |  2 +-
>   drivers/block/rnbd/rnbd-clt.c       |  2 +-
>   drivers/block/swim.c                |  2 +-
>   drivers/block/swim3.c               |  3 +--
>   drivers/block/z2ram.c               |  2 +-
>   drivers/cdrom/gdrom.c               |  2 +-
>   drivers/md/bcache/super.c           |  2 +-
>   drivers/md/dm.c                     |  2 +-
>   drivers/md/md.c                     |  2 +-
>   drivers/mmc/core/block.c            |  2 +-
>   drivers/mtd/mtd_blkdevs.c           |  2 +-
>   drivers/mtd/ubi/block.c             |  2 +-
>   drivers/nvme/host/core.c            |  2 +-
>   drivers/nvme/host/multipath.c       |  2 +-
>   drivers/s390/block/dasd.c           |  2 +-
>   drivers/s390/block/dcssblk.c        |  4 ++--
>   drivers/scsi/sd.c                   |  3 +--
>   drivers/scsi/sr.c                   |  2 +-
>   include/linux/blkdev.h              |  2 +-
>   30 files changed, 41 insertions(+), 43 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

[PATCH 11/31] block: rename blkdev_close to blkdev_release

[Christoph Hellwig]

Make the function name match the method name.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/fops.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/block/fops.c b/block/fops.c
index 6a3087b750a6cd..26af2b39c758e1 100644
--- a/block/fops.c
+++ b/block/fops.c
@@ -500,7 +500,7 @@ static int blkdev_open(struct inode *inode, struct file *filp)
 	return 0;
 }
 
-static int blkdev_close(struct inode *inode, struct file *filp)
+static int blkdev_release(struct inode *inode, struct file *filp)
 {
 	struct block_device *bdev = filp->private_data;
 
@@ -677,7 +677,7 @@ static long blkdev_fallocate(struct file *file, int mode, loff_t start,
 
 const struct file_operations def_blk_fops = {
 	.open		= blkdev_open,
-	.release	= blkdev_close,
+	.release	= blkdev_release,
 	.llseek		= blkdev_llseek,
 	.read_iter	= blkdev_read_iter,
 	.write_iter	= blkdev_write_iter,
-- 
2.39.2

Re: [PATCH 11/31] block: rename blkdev_close to blkdev_release

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:30AM +0200, Christoph Hellwig wrote:
> Make the function name match the method name.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 11/31] block: rename blkdev_close to blkdev_release

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> Make the function name match the method name.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   block/fops.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

[PATCH 12/31] swsusp: don't pass a stack address to blkdev_get_by_path

[Christoph Hellwig]

holder is just an on-stack pointer that can easily be reused by other calls,
replace it with a static variable that doesn't change.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 kernel/power/swap.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index 81aec3b2c60510..b03ff1a33c7f68 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -1510,6 +1510,8 @@ int swsusp_read(unsigned int *flags_p)
 	return error;
 }
 
+static void *swsusp_holder;
+
 /**
  *      swsusp_check - Check for swsusp signature in the resume device
  */
@@ -1517,14 +1519,13 @@ int swsusp_read(unsigned int *flags_p)
 int swsusp_check(bool snapshot_test)
 {
 	int error;
-	void *holder;
 	fmode_t mode = FMODE_READ;
 
 	if (snapshot_test)
 		mode |= FMODE_EXCL;
 
 	hib_resume_bdev = blkdev_get_by_dev(swsusp_resume_device,
-					    mode, &holder, NULL);
+					    mode, &swsusp_holder, NULL);
 	if (!IS_ERR(hib_resume_bdev)) {
 		set_blocksize(hib_resume_bdev, PAGE_SIZE);
 		clear_page(swsusp_header);
-- 
2.39.2

Re: [PATCH 12/31] swsusp: don't pass a stack address to blkdev_get_by_path

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> holder is just an on-stack pointer that can easily be reused by other calls,
> replace it with a static variable that doesn't change.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   kernel/power/swap.c | 5 +++--
>   1 file changed, 3 insertions(+), 2 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

[PATCH 13/31] bcache: don't pass a stack address to blkdev_get_by_path

[Christoph Hellwig]

sb is just an on-stack pointer that can easily be reused by other calls.
Switch to use the bcache-wide bcache_kobj instead as there is no need to
claim per-bcache device anyway.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/md/bcache/super.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 94b91c45c9e2a9..4a2aed047aec12 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -2560,7 +2560,7 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr,
 	err = "failed to open device";
 	bdev = blkdev_get_by_path(strim(path),
 				  FMODE_READ|FMODE_WRITE|FMODE_EXCL,
-				  sb, NULL);
+				  bcache_kobj, NULL);
 	if (IS_ERR(bdev)) {
 		if (bdev == ERR_PTR(-EBUSY)) {
 			dev_t dev;
-- 
2.39.2

Re: [PATCH 13/31] bcache: don't pass a stack address to blkdev_get_by_path

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> sb is just an on-stack pointer that can easily be reused by other calls.
> Switch to use the bcache-wide bcache_kobj instead as there is no need to
> claim per-bcache device anyway.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   drivers/md/bcache/super.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

[PATCH 14/31] rnbd-srv: don't pass a holder for non-exclusive blkdev_get_by_path

[Christoph Hellwig]

Passing a holder to blkdev_get_by_path when FMODE_EXCL isn't set doesn't
make sense, so pass NULL instead.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/block/rnbd/rnbd-srv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/block/rnbd/rnbd-srv.c b/drivers/block/rnbd/rnbd-srv.c
index cec22bbae2f9a5..ce505e552f4d50 100644
--- a/drivers/block/rnbd/rnbd-srv.c
+++ b/drivers/block/rnbd/rnbd-srv.c
@@ -719,7 +719,7 @@ static int process_msg_open(struct rnbd_srv_session *srv_sess,
 		goto reject;
 	}
 
-	bdev = blkdev_get_by_path(full_path, open_flags, THIS_MODULE, NULL);
+	bdev = blkdev_get_by_path(full_path, open_flags, NULL, NULL);
 	if (IS_ERR(bdev)) {
 		ret = PTR_ERR(bdev);
 		pr_err("Opening device '%s' on session %s failed, failed to open the block device, err: %d\n",
-- 
2.39.2

Re: [PATCH 14/31] rnbd-srv: don't pass a holder for non-exclusive blkdev_get_by_path

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:33AM +0200, Christoph Hellwig wrote:
> Passing a holder to blkdev_get_by_path when FMODE_EXCL isn't set doesn't
> make sense, so pass NULL instead.
> 
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>

Re: [PATCH 14/31] rnbd-srv: don't pass a holder for non-exclusive blkdev_get_by_path

[Jinpu Wang]

On Tue, Jun 6, 2023 at 9:40 AM Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org> wrote:
>
> Passing a holder to blkdev_get_by_path when FMODE_EXCL isn't set doesn't
> make sense, so pass NULL instead.
>
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
Acked-by: Jack Wang <jinpu.wang-vEVw2sk9H7kAvxtiuMwx3w@public.gmane.org>
> ---
>  drivers/block/rnbd/rnbd-srv.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/block/rnbd/rnbd-srv.c b/drivers/block/rnbd/rnbd-srv.c
> index cec22bbae2f9a5..ce505e552f4d50 100644
> --- a/drivers/block/rnbd/rnbd-srv.c
> +++ b/drivers/block/rnbd/rnbd-srv.c
> @@ -719,7 +719,7 @@ static int process_msg_open(struct rnbd_srv_session *srv_sess,
>                 goto reject;
>         }
>
> -       bdev = blkdev_get_by_path(full_path, open_flags, THIS_MODULE, NULL);
> +       bdev = blkdev_get_by_path(full_path, open_flags, NULL, NULL);
>         if (IS_ERR(bdev)) {
>                 ret = PTR_ERR(bdev);
>                 pr_err("Opening device '%s' on session %s failed, failed to open the block device, err: %d\n",
> --
> 2.39.2
>

Re: [PATCH 14/31] rnbd-srv: don't pass a holder for non-exclusive blkdev_get_by_path

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> Passing a holder to blkdev_get_by_path when FMODE_EXCL isn't set doesn't
> make sense, so pass NULL instead.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   drivers/block/rnbd/rnbd-srv.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

[PATCH 15/31] btrfs: don't pass a holder for non-exclusive blkdev_get_by_path

[Christoph Hellwig]

Passing a holder to blkdev_get_by_path when FMODE_EXCL isn't set doesn't
make sense, so pass NULL instead and remove the holder argument from the
call chains the only end up in non-FMODE_EXCL blkdev_get_by_path calls.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/btrfs/super.c   | 16 ++++++----------
 fs/btrfs/volumes.c | 17 ++++++++---------
 fs/btrfs/volumes.h |  3 +--
 3 files changed, 15 insertions(+), 21 deletions(-)

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index ec18e22106023b..1a2ee9407f5414 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -849,8 +849,7 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
  * All other options will be parsed on much later in the mount process and
  * only when we need to allocate a new super block.
  */
-static int btrfs_parse_device_options(const char *options, fmode_t flags,
-				      void *holder)
+static int btrfs_parse_device_options(const char *options, fmode_t flags)
 {
 	substring_t args[MAX_OPT_ARGS];
 	char *device_name, *opts, *orig, *p;
@@ -884,8 +883,7 @@ static int btrfs_parse_device_options(const char *options, fmode_t flags,
 				error = -ENOMEM;
 				goto out;
 			}
-			device = btrfs_scan_one_device(device_name, flags,
-					holder);
+			device = btrfs_scan_one_device(device_name, flags);
 			kfree(device_name);
 			if (IS_ERR(device)) {
 				error = PTR_ERR(device);
@@ -1477,13 +1475,13 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type,
 	}
 
 	mutex_lock(&uuid_mutex);
-	error = btrfs_parse_device_options(data, mode, fs_type);
+	error = btrfs_parse_device_options(data, mode);
 	if (error) {
 		mutex_unlock(&uuid_mutex);
 		goto error_fs_info;
 	}
 
-	device = btrfs_scan_one_device(device_name, mode, fs_type);
+	device = btrfs_scan_one_device(device_name, mode);
 	if (IS_ERR(device)) {
 		mutex_unlock(&uuid_mutex);
 		error = PTR_ERR(device);
@@ -2190,8 +2188,7 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
 	switch (cmd) {
 	case BTRFS_IOC_SCAN_DEV:
 		mutex_lock(&uuid_mutex);
-		device = btrfs_scan_one_device(vol->name, FMODE_READ,
-					       &btrfs_root_fs_type);
+		device = btrfs_scan_one_device(vol->name, FMODE_READ);
 		ret = PTR_ERR_OR_ZERO(device);
 		mutex_unlock(&uuid_mutex);
 		break;
@@ -2205,8 +2202,7 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
 		break;
 	case BTRFS_IOC_DEVICES_READY:
 		mutex_lock(&uuid_mutex);
-		device = btrfs_scan_one_device(vol->name, FMODE_READ,
-					       &btrfs_root_fs_type);
+		device = btrfs_scan_one_device(vol->name, FMODE_READ);
 		if (IS_ERR(device)) {
 			mutex_unlock(&uuid_mutex);
 			ret = PTR_ERR(device);
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 784ccc8f6c69c1..035868cee3ddc3 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1348,8 +1348,7 @@ int btrfs_forget_devices(dev_t devt)
  * and we are not allowed to call set_blocksize during the scan. The superblock
  * is read via pagecache
  */
-struct btrfs_device *btrfs_scan_one_device(const char *path, fmode_t flags,
-					   void *holder)
+struct btrfs_device *btrfs_scan_one_device(const char *path, fmode_t flags)
 {
 	struct btrfs_super_block *disk_super;
 	bool new_device_added = false;
@@ -1368,16 +1367,16 @@ struct btrfs_device *btrfs_scan_one_device(const char *path, fmode_t flags,
 	 */
 
 	/*
-	 * Avoid using flag |= FMODE_EXCL here, as the systemd-udev may
-	 * initiate the device scan which may race with the user's mount
-	 * or mkfs command, resulting in failure.
-	 * Since the device scan is solely for reading purposes, there is
-	 * no need for FMODE_EXCL. Additionally, the devices are read again
+	 * Avoid an exclusive open here, as the systemd-udev may initiate the
+	 * device scan which may race with the user's mount or mkfs command,
+	 * resulting in failure.
+	 * Since the device scan is solely for reading purposes, there is no
+	 * need for an exclusive open. Additionally, the devices are read again
 	 * during the mount process. It is ok to get some inconsistent
 	 * values temporarily, as the device paths of the fsid are the only
 	 * required information for assembling the volume.
 	 */
-	bdev = blkdev_get_by_path(path, flags, holder, NULL);
+	bdev = blkdev_get_by_path(path, flags, NULL, NULL);
 	if (IS_ERR(bdev))
 		return ERR_CAST(bdev);
 
@@ -2381,7 +2380,7 @@ int btrfs_get_dev_args_from_path(struct btrfs_fs_info *fs_info,
 		return -ENOMEM;
 	}
 
-	ret = btrfs_get_bdev_and_sb(path, FMODE_READ, fs_info->bdev_holder, 0,
+	ret = btrfs_get_bdev_and_sb(path, FMODE_READ, NULL, 0,
 				    &bdev, &disk_super);
 	if (ret) {
 		btrfs_put_dev_args_from_path(args);
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index bf47a1a70813ba..eb97a397b3c3fb 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -600,8 +600,7 @@ struct btrfs_block_group *btrfs_create_chunk(struct btrfs_trans_handle *trans,
 void btrfs_mapping_tree_free(struct extent_map_tree *tree);
 int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
 		       fmode_t flags, void *holder);
-struct btrfs_device *btrfs_scan_one_device(const char *path,
-					   fmode_t flags, void *holder);
+struct btrfs_device *btrfs_scan_one_device(const char *path, fmode_t flags);
 int btrfs_forget_devices(dev_t devt);
 void btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
 void btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices);
-- 
2.39.2

Re: [PATCH 15/31] btrfs: don't pass a holder for non-exclusive blkdev_get_by_path

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:34AM +0200, Christoph Hellwig wrote:
> Passing a holder to blkdev_get_by_path when FMODE_EXCL isn't set doesn't
> make sense, so pass NULL instead and remove the holder argument from the
> call chains the only end up in non-FMODE_EXCL blkdev_get_by_path calls.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 15/31] btrfs: don't pass a holder for non-exclusive blkdev_get_by_path

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> Passing a holder to blkdev_get_by_path when FMODE_EXCL isn't set doesn't
> make sense, so pass NULL instead and remove the holder argument from the
> call chains the only end up in non-FMODE_EXCL blkdev_get_by_path calls.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   fs/btrfs/super.c   | 16 ++++++----------
>   fs/btrfs/volumes.c | 17 ++++++++---------
>   fs/btrfs/volumes.h |  3 +--
>   3 files changed, 15 insertions(+), 21 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

Re: [PATCH 15/31] btrfs: don't pass a holder for non-exclusive blkdev_get_by_path

[David Sterba]

On Tue, Jun 06, 2023 at 09:39:34AM +0200, Christoph Hellwig wrote:
> Passing a holder to blkdev_get_by_path when FMODE_EXCL isn't set doesn't
> make sense, so pass NULL instead and remove the holder argument from the
> call chains the only end up in non-FMODE_EXCL blkdev_get_by_path calls.

Please add

"Exclusive mode for device scanning is not used since 50d281fc434c
 ("btrfs: scan device in non-exclusive mode")."

Acked-by: David Sterba <dsterba@suse.com>

[PATCH 16/31] block: use the holder as indication for exclusive opens

[Christoph Hellwig]

The current interface for exclusive opens is rather confusing as it
requires both the FMODE_EXCL flag and a holder.  Remove the need to pass
FMODE_EXCL and just key off the exclusive open off a non-NULL holder.

For blkdev_put this requires adding the holder argument, which provides
better debug checking that only the holder actually releases the hold,
but at the same time allows removing the now superfluous mode argument.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/bdev.c                        | 37 ++++++++++++++++------------
 block/fops.c                        |  6 +++--
 block/genhd.c                       |  5 ++--
 block/ioctl.c                       |  5 ++--
 drivers/block/drbd/drbd_nl.c        | 23 ++++++++++-------
 drivers/block/pktcdvd.c             | 13 +++++-----
 drivers/block/rnbd/rnbd-srv.c       |  4 +--
 drivers/block/xen-blkback/xenbus.c  |  2 +-
 drivers/block/zram/zram_drv.c       |  8 +++---
 drivers/md/bcache/super.c           | 15 ++++++------
 drivers/md/dm.c                     |  6 ++---
 drivers/md/md.c                     | 38 +++++++++++++++--------------
 drivers/mtd/devices/block2mtd.c     |  4 +--
 drivers/nvme/target/io-cmd-bdev.c   |  2 +-
 drivers/s390/block/dasd_genhd.c     |  2 +-
 drivers/target/target_core_iblock.c |  6 ++---
 drivers/target/target_core_pscsi.c  |  8 +++---
 fs/btrfs/dev-replace.c              |  6 ++---
 fs/btrfs/ioctl.c                    | 12 ++++-----
 fs/btrfs/volumes.c                  | 28 ++++++++++-----------
 fs/btrfs/volumes.h                  |  6 ++---
 fs/erofs/super.c                    |  7 +++---
 fs/ext4/super.c                     | 11 +++------
 fs/f2fs/super.c                     |  2 +-
 fs/jfs/jfs_logmgr.c                 |  6 ++---
 fs/nfs/blocklayout/dev.c            |  4 +--
 fs/nilfs2/super.c                   |  6 ++---
 fs/ocfs2/cluster/heartbeat.c        |  4 +--
 fs/reiserfs/journal.c               | 19 +++++++--------
 fs/reiserfs/reiserfs.h              |  1 -
 fs/super.c                          | 20 +++++++--------
 fs/xfs/xfs_super.c                  | 15 ++++++------
 include/linux/blkdev.h              |  2 +-
 kernel/power/hibernate.c            | 12 +++------
 kernel/power/power.h                |  2 +-
 kernel/power/swap.c                 | 21 +++++++---------
 mm/swapfile.c                       |  7 +++---
 37 files changed, 183 insertions(+), 192 deletions(-)

diff --git a/block/bdev.c b/block/bdev.c
index 2c6888ceb3784a..db63e5bcc46ffa 100644
--- a/block/bdev.c
+++ b/block/bdev.c
@@ -604,7 +604,7 @@ void bd_abort_claiming(struct block_device *bdev, void *holder)
 }
 EXPORT_SYMBOL(bd_abort_claiming);
 
-static void bd_end_claim(struct block_device *bdev)
+static void bd_end_claim(struct block_device *bdev, void *holder)
 {
 	struct block_device *whole = bdev_whole(bdev);
 	bool unblock = false;
@@ -614,6 +614,7 @@ static void bd_end_claim(struct block_device *bdev)
 	 * bdev_lock.  open_mutex is used to synchronize disk_holder unlinking.
 	 */
 	mutex_lock(&bdev_lock);
+	WARN_ON_ONCE(bdev->bd_holder != holder);
 	WARN_ON_ONCE(--bdev->bd_holders < 0);
 	WARN_ON_ONCE(--whole->bd_holders < 0);
 	if (!bdev->bd_holders) {
@@ -750,10 +751,9 @@ void blkdev_put_no_open(struct block_device *bdev)
  * @holder: exclusive holder identifier
  * @hops: holder operations
  *
- * Open the block device described by device number @dev. If @mode includes
- * %FMODE_EXCL, the block device is opened with exclusive access.  Specifying
- * %FMODE_EXCL with a %NULL @holder is invalid.  Exclusive opens may nest for
- * the same @holder.
+ * Open the block device described by device number @dev. If @holder is not
+ * %NULL, the block device is opened with exclusive access.  Exclusive opens may
+ * nest for the same @holder.
  *
  * Use this interface ONLY if you really do not have anything better - i.e. when
  * you are behind a truly sucky interface and all you are given is a device
@@ -785,10 +785,16 @@ struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
 		return ERR_PTR(-ENXIO);
 	disk = bdev->bd_disk;
 
-	if (mode & FMODE_EXCL) {
+	if (holder) {
+		mode |= FMODE_EXCL;
 		ret = bd_prepare_to_claim(bdev, holder, hops);
 		if (ret)
 			goto put_blkdev;
+	} else {
+		if (WARN_ON_ONCE(mode & FMODE_EXCL)) {
+			ret = -EIO;
+			goto put_blkdev;
+		}
 	}
 
 	disk_block_events(disk);
@@ -805,7 +811,7 @@ struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
 		ret = blkdev_get_whole(bdev, mode);
 	if (ret)
 		goto put_module;
-	if (mode & FMODE_EXCL) {
+	if (holder) {
 		bd_finish_claiming(bdev, holder, hops);
 
 		/*
@@ -829,7 +835,7 @@ struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
 put_module:
 	module_put(disk->fops->owner);
 abort_claiming:
-	if (mode & FMODE_EXCL)
+	if (holder)
 		bd_abort_claiming(bdev, holder);
 	mutex_unlock(&disk->open_mutex);
 	disk_unblock_events(disk);
@@ -845,10 +851,9 @@ EXPORT_SYMBOL(blkdev_get_by_dev);
  * @mode: FMODE_* mask
  * @holder: exclusive holder identifier
  *
- * Open the block device described by the device file at @path.  If @mode
- * includes %FMODE_EXCL, the block device is opened with exclusive access.
- * Specifying %FMODE_EXCL with a %NULL @holder is invalid.  Exclusive opens may
- * nest for the same @holder.
+ * Open the block device described by the device file at @path.  If @holder is
+ * not %NULL, the block device is opened with exclusive access.  Exclusive opens
+ * may nest for the same @holder.
  *
  * CONTEXT:
  * Might sleep.
@@ -869,7 +874,7 @@ struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
 
 	bdev = blkdev_get_by_dev(dev, mode, holder, hops);
 	if (!IS_ERR(bdev) && (mode & FMODE_WRITE) && bdev_read_only(bdev)) {
-		blkdev_put(bdev, mode);
+		blkdev_put(bdev, holder);
 		return ERR_PTR(-EACCES);
 	}
 
@@ -877,7 +882,7 @@ struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
 }
 EXPORT_SYMBOL(blkdev_get_by_path);
 
-void blkdev_put(struct block_device *bdev, fmode_t mode)
+void blkdev_put(struct block_device *bdev, void *holder)
 {
 	struct gendisk *disk = bdev->bd_disk;
 
@@ -892,8 +897,8 @@ void blkdev_put(struct block_device *bdev, fmode_t mode)
 		sync_blockdev(bdev);
 
 	mutex_lock(&disk->open_mutex);
-	if (mode & FMODE_EXCL)
-		bd_end_claim(bdev);
+	if (holder)
+		bd_end_claim(bdev, holder);
 
 	/*
 	 * Trigger event checking and tell drivers to flush MEDIA_CHANGE
diff --git a/block/fops.c b/block/fops.c
index 26af2b39c758e1..9f26e25bafa172 100644
--- a/block/fops.c
+++ b/block/fops.c
@@ -490,7 +490,9 @@ static int blkdev_open(struct inode *inode, struct file *filp)
 	if ((filp->f_flags & O_ACCMODE) == 3)
 		filp->f_mode |= FMODE_WRITE_IOCTL;
 
-	bdev = blkdev_get_by_dev(inode->i_rdev, filp->f_mode, filp, NULL);
+	bdev = blkdev_get_by_dev(inode->i_rdev, filp->f_mode,
+				 (filp->f_mode & FMODE_EXCL) ? filp : NULL,
+				 NULL);
 	if (IS_ERR(bdev))
 		return PTR_ERR(bdev);
 
@@ -504,7 +506,7 @@ static int blkdev_release(struct inode *inode, struct file *filp)
 {
 	struct block_device *bdev = filp->private_data;
 
-	blkdev_put(bdev, filp->f_mode);
+	blkdev_put(bdev, (filp->f_mode & FMODE_EXCL) ? filp : NULL);
 	return 0;
 }
 
diff --git a/block/genhd.c b/block/genhd.c
index 4e5fd6aaa883fd..b56f8b5c88b3e3 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -365,12 +365,11 @@ int disk_scan_partitions(struct gendisk *disk, fmode_t mode)
 	}
 
 	set_bit(GD_NEED_PART_SCAN, &disk->state);
-	bdev = blkdev_get_by_dev(disk_devt(disk), mode & ~FMODE_EXCL, NULL,
-				 NULL);
+	bdev = blkdev_get_by_dev(disk_devt(disk), mode, NULL, NULL);
 	if (IS_ERR(bdev))
 		ret =  PTR_ERR(bdev);
 	else
-		blkdev_put(bdev, mode & ~FMODE_EXCL);
+		blkdev_put(bdev, NULL);
 
 	/*
 	 * If blkdev_get_by_dev() failed early, GD_NEED_PART_SCAN is still set,
diff --git a/block/ioctl.c b/block/ioctl.c
index c7d7d4345edb4f..b39bd5b41ee492 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -454,11 +454,10 @@ static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
 	if (mode & FMODE_EXCL)
 		return set_blocksize(bdev, n);
 
-	if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode | FMODE_EXCL, &bdev,
-			NULL)))
+	if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode, &bdev, NULL)))
 		return -EBUSY;
 	ret = set_blocksize(bdev, n);
-	blkdev_put(bdev, mode | FMODE_EXCL);
+	blkdev_put(bdev, &bdev);
 
 	return ret;
 }
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index cab59dab3410aa..10b1e5171332f7 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -1640,8 +1640,7 @@ static struct block_device *open_backing_dev(struct drbd_device *device,
 	struct block_device *bdev;
 	int err = 0;
 
-	bdev = blkdev_get_by_path(bdev_path,
-				  FMODE_READ | FMODE_WRITE | FMODE_EXCL,
+	bdev = blkdev_get_by_path(bdev_path, FMODE_READ | FMODE_WRITE,
 				  claim_ptr, NULL);
 	if (IS_ERR(bdev)) {
 		drbd_err(device, "open(\"%s\") failed with %ld\n",
@@ -1654,7 +1653,7 @@ static struct block_device *open_backing_dev(struct drbd_device *device,
 
 	err = bd_link_disk_holder(bdev, device->vdisk);
 	if (err) {
-		blkdev_put(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL);
+		blkdev_put(bdev, claim_ptr);
 		drbd_err(device, "bd_link_disk_holder(\"%s\", ...) failed with %d\n",
 				bdev_path, err);
 		bdev = ERR_PTR(err);
@@ -1696,13 +1695,13 @@ static int open_backing_devices(struct drbd_device *device,
 }
 
 static void close_backing_dev(struct drbd_device *device, struct block_device *bdev,
-	bool do_bd_unlink)
+		void *claim_ptr, bool do_bd_unlink)
 {
 	if (!bdev)
 		return;
 	if (do_bd_unlink)
 		bd_unlink_disk_holder(bdev, device->vdisk);
-	blkdev_put(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL);
+	blkdev_put(bdev, claim_ptr);
 }
 
 void drbd_backing_dev_free(struct drbd_device *device, struct drbd_backing_dev *ldev)
@@ -1710,8 +1709,11 @@ void drbd_backing_dev_free(struct drbd_device *device, struct drbd_backing_dev *
 	if (ldev == NULL)
 		return;
 
-	close_backing_dev(device, ldev->md_bdev, ldev->md_bdev != ldev->backing_bdev);
-	close_backing_dev(device, ldev->backing_bdev, true);
+	close_backing_dev(device, ldev->md_bdev,
+			  ldev->md.meta_dev_idx < 0 ?
+				(void *)device : (void *)drbd_m_holder,
+			  ldev->md_bdev != ldev->backing_bdev);
+	close_backing_dev(device, ldev->backing_bdev, device, true);
 
 	kfree(ldev->disk_conf);
 	kfree(ldev);
@@ -2127,8 +2129,11 @@ int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info)
  fail:
 	conn_reconfig_done(connection);
 	if (nbc) {
-		close_backing_dev(device, nbc->md_bdev, nbc->md_bdev != nbc->backing_bdev);
-		close_backing_dev(device, nbc->backing_bdev, true);
+		close_backing_dev(device, nbc->md_bdev,
+			  nbc->disk_conf->meta_dev_idx < 0 ?
+				(void *)device : (void *)drbd_m_holder,
+			  nbc->md_bdev != nbc->backing_bdev);
+		close_backing_dev(device, nbc->backing_bdev, device, true);
 		kfree(nbc);
 	}
 	kfree(new_disk_conf);
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index fe0084bbb11f7c..0842a45cba167e 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -2125,8 +2125,7 @@ static int pkt_open_dev(struct pktcdvd_device *pd, fmode_t write)
 	 * to read/write from/to it. It is already opened in O_NONBLOCK mode
 	 * so open should not fail.
 	 */
-	bdev = blkdev_get_by_dev(pd->bdev->bd_dev, FMODE_READ | FMODE_EXCL, pd,
-				 NULL);
+	bdev = blkdev_get_by_dev(pd->bdev->bd_dev, FMODE_READ, pd, NULL);
 	if (IS_ERR(bdev)) {
 		ret = PTR_ERR(bdev);
 		goto out;
@@ -2173,7 +2172,7 @@ static int pkt_open_dev(struct pktcdvd_device *pd, fmode_t write)
 	return 0;
 
 out_putdev:
-	blkdev_put(bdev, FMODE_READ | FMODE_EXCL);
+	blkdev_put(bdev, pd);
 out:
 	return ret;
 }
@@ -2190,7 +2189,7 @@ static void pkt_release_dev(struct pktcdvd_device *pd, int flush)
 	pkt_lock_door(pd, 0);
 
 	pkt_set_speed(pd, MAX_SPEED, MAX_SPEED);
-	blkdev_put(pd->bdev, FMODE_READ | FMODE_EXCL);
+	blkdev_put(pd->bdev, pd);
 
 	pkt_shrink_pktlist(pd);
 }
@@ -2536,7 +2535,7 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev)
 		return PTR_ERR(bdev);
 	sdev = scsi_device_from_queue(bdev->bd_disk->queue);
 	if (!sdev) {
-		blkdev_put(bdev, FMODE_READ | FMODE_NDELAY);
+		blkdev_put(bdev, NULL);
 		return -EINVAL;
 	}
 	put_device(&sdev->sdev_gendev);
@@ -2561,7 +2560,7 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev)
 	return 0;
 
 out_mem:
-	blkdev_put(bdev, FMODE_READ | FMODE_NDELAY);
+	blkdev_put(bdev, NULL);
 	/* This is safe: open() is still holding a reference. */
 	module_put(THIS_MODULE);
 	return -ENOMEM;
@@ -2764,7 +2763,7 @@ static int pkt_remove_dev(dev_t pkt_dev)
 	pkt_debugfs_dev_remove(pd);
 	pkt_sysfs_dev_remove(pd);
 
-	blkdev_put(pd->bdev, FMODE_READ | FMODE_NDELAY);
+	blkdev_put(pd->bdev, NULL);
 
 	remove_proc_entry(pd->name, pkt_proc);
 	pkt_dbg(1, pd, "writer unmapped\n");
diff --git a/drivers/block/rnbd/rnbd-srv.c b/drivers/block/rnbd/rnbd-srv.c
index ce505e552f4d50..29d560472d05ba 100644
--- a/drivers/block/rnbd/rnbd-srv.c
+++ b/drivers/block/rnbd/rnbd-srv.c
@@ -219,7 +219,7 @@ void rnbd_destroy_sess_dev(struct rnbd_srv_sess_dev *sess_dev, bool keep_id)
 	rnbd_put_sess_dev(sess_dev);
 	wait_for_completion(&dc); /* wait for inflights to drop to zero */
 
-	blkdev_put(sess_dev->bdev, sess_dev->open_flags);
+	blkdev_put(sess_dev->bdev, NULL);
 	mutex_lock(&sess_dev->dev->lock);
 	list_del(&sess_dev->dev_list);
 	if (sess_dev->open_flags & FMODE_WRITE)
@@ -795,7 +795,7 @@ static int process_msg_open(struct rnbd_srv_session *srv_sess,
 	}
 	rnbd_put_srv_dev(srv_dev);
 blkdev_put:
-	blkdev_put(bdev, open_flags);
+	blkdev_put(bdev, NULL);
 free_path:
 	kfree(full_path);
 reject:
diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
index 43b36da9b3544d..141b60aad57038 100644
--- a/drivers/block/xen-blkback/xenbus.c
+++ b/drivers/block/xen-blkback/xenbus.c
@@ -473,7 +473,7 @@ static void xenvbd_sysfs_delif(struct xenbus_device *dev)
 static void xen_vbd_free(struct xen_vbd *vbd)
 {
 	if (vbd->bdev)
-		blkdev_put(vbd->bdev, vbd->readonly ? FMODE_READ : FMODE_WRITE);
+		blkdev_put(vbd->bdev, NULL);
 	vbd->bdev = NULL;
 }
 
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index f5644c60604070..21615d67a9bd66 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -420,7 +420,7 @@ static void reset_bdev(struct zram *zram)
 		return;
 
 	bdev = zram->bdev;
-	blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
+	blkdev_put(bdev, zram);
 	/* hope filp_close flush all of IO */
 	filp_close(zram->backing_dev, NULL);
 	zram->backing_dev = NULL;
@@ -507,8 +507,8 @@ static ssize_t backing_dev_store(struct device *dev,
 		goto out;
 	}
 
-	bdev = blkdev_get_by_dev(inode->i_rdev,
-			FMODE_READ | FMODE_WRITE | FMODE_EXCL, zram, NULL);
+	bdev = blkdev_get_by_dev(inode->i_rdev, FMODE_READ | FMODE_WRITE, zram,
+				 NULL);
 	if (IS_ERR(bdev)) {
 		err = PTR_ERR(bdev);
 		bdev = NULL;
@@ -539,7 +539,7 @@ static ssize_t backing_dev_store(struct device *dev,
 	kvfree(bitmap);
 
 	if (bdev)
-		blkdev_put(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL);
+		blkdev_put(bdev, zram);
 
 	if (backing_dev)
 		filp_close(backing_dev, NULL);
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 4a2aed047aec12..7022fea396f25e 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -1369,7 +1369,7 @@ static void cached_dev_free(struct closure *cl)
 		put_page(virt_to_page(dc->sb_disk));
 
 	if (!IS_ERR_OR_NULL(dc->bdev))
-		blkdev_put(dc->bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
+		blkdev_put(dc->bdev, bcache_kobj);
 
 	wake_up(&unregister_wait);
 
@@ -2218,7 +2218,7 @@ void bch_cache_release(struct kobject *kobj)
 		put_page(virt_to_page(ca->sb_disk));
 
 	if (!IS_ERR_OR_NULL(ca->bdev))
-		blkdev_put(ca->bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
+		blkdev_put(ca->bdev, bcache_kobj);
 
 	kfree(ca);
 	module_put(THIS_MODULE);
@@ -2359,7 +2359,7 @@ static int register_cache(struct cache_sb *sb, struct cache_sb_disk *sb_disk,
 		 * call blkdev_put() to bdev in bch_cache_release(). So we
 		 * explicitly call blkdev_put() here.
 		 */
-		blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
+		blkdev_put(bdev, bcache_kobj);
 		if (ret == -ENOMEM)
 			err = "cache_alloc(): -ENOMEM";
 		else if (ret == -EPERM)
@@ -2461,7 +2461,7 @@ static void register_bdev_worker(struct work_struct *work)
 	if (!dc) {
 		fail = true;
 		put_page(virt_to_page(args->sb_disk));
-		blkdev_put(args->bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL);
+		blkdev_put(args->bdev, bcache_kobj);
 		goto out;
 	}
 
@@ -2491,7 +2491,7 @@ static void register_cache_worker(struct work_struct *work)
 	if (!ca) {
 		fail = true;
 		put_page(virt_to_page(args->sb_disk));
-		blkdev_put(args->bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL);
+		blkdev_put(args->bdev, bcache_kobj);
 		goto out;
 	}
 
@@ -2558,8 +2558,7 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr,
 
 	ret = -EINVAL;
 	err = "failed to open device";
-	bdev = blkdev_get_by_path(strim(path),
-				  FMODE_READ|FMODE_WRITE|FMODE_EXCL,
+	bdev = blkdev_get_by_path(strim(path), FMODE_READ | FMODE_WRITE,
 				  bcache_kobj, NULL);
 	if (IS_ERR(bdev)) {
 		if (bdev == ERR_PTR(-EBUSY)) {
@@ -2648,7 +2647,7 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr,
 out_put_sb_page:
 	put_page(virt_to_page(sb_disk));
 out_blkdev_put:
-	blkdev_put(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL);
+	blkdev_put(bdev, register_bcache);
 out_free_sb:
 	kfree(sb);
 out_free_path:
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 246b8f028a98f4..b16e37362c5a01 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -746,7 +746,7 @@ static struct table_device *open_table_device(struct mapped_device *md,
 		return ERR_PTR(-ENOMEM);
 	refcount_set(&td->count, 1);
 
-	bdev = blkdev_get_by_dev(dev, mode | FMODE_EXCL, _dm_claim_ptr, NULL);
+	bdev = blkdev_get_by_dev(dev, mode, _dm_claim_ptr, NULL);
 	if (IS_ERR(bdev)) {
 		r = PTR_ERR(bdev);
 		goto out_free_td;
@@ -771,7 +771,7 @@ static struct table_device *open_table_device(struct mapped_device *md,
 	return td;
 
 out_blkdev_put:
-	blkdev_put(bdev, mode | FMODE_EXCL);
+	blkdev_put(bdev, _dm_claim_ptr);
 out_free_td:
 	kfree(td);
 	return ERR_PTR(r);
@@ -784,7 +784,7 @@ static void close_table_device(struct table_device *td, struct mapped_device *md
 {
 	if (md->disk->slave_dir)
 		bd_unlink_disk_holder(td->dm_dev.bdev, md->disk);
-	blkdev_put(td->dm_dev.bdev, td->dm_dev.mode | FMODE_EXCL);
+	blkdev_put(td->dm_dev.bdev, _dm_claim_ptr);
 	put_dax(td->dm_dev.dax_dev);
 	list_del(&td->list);
 	kfree(td);
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 159197dd7b6de1..dad4a5539f9f68 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2449,7 +2449,10 @@ static void rdev_delayed_delete(struct work_struct *ws)
 
 void md_autodetect_dev(dev_t dev);
 
-static void export_rdev(struct md_rdev *rdev)
+/* just for claiming the bdev */
+static struct md_rdev claim_rdev;
+
+static void export_rdev(struct md_rdev *rdev, struct mddev *mddev)
 {
 	pr_debug("md: export_rdev(%pg)\n", rdev->bdev);
 	md_rdev_clear(rdev);
@@ -2457,7 +2460,7 @@ static void export_rdev(struct md_rdev *rdev)
 	if (test_bit(AutoDetected, &rdev->flags))
 		md_autodetect_dev(rdev->bdev->bd_dev);
 #endif
-	blkdev_put(rdev->bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL);
+	blkdev_put(rdev->bdev, mddev->major_version == -2 ? &claim_rdev : rdev);
 	rdev->bdev = NULL;
 	kobject_put(&rdev->kobj);
 }
@@ -2485,7 +2488,7 @@ static void md_kick_rdev_from_array(struct md_rdev *rdev)
 	INIT_WORK(&rdev->del_work, rdev_delayed_delete);
 	kobject_get(&rdev->kobj);
 	queue_work(md_rdev_misc_wq, &rdev->del_work);
-	export_rdev(rdev);
+	export_rdev(rdev, rdev->mddev);
 }
 
 static void export_array(struct mddev *mddev)
@@ -3612,6 +3615,7 @@ int md_rdev_init(struct md_rdev *rdev)
 	return badblocks_init(&rdev->badblocks, 0);
 }
 EXPORT_SYMBOL_GPL(md_rdev_init);
+
 /*
  * Import a device. If 'super_format' >= 0, then sanity check the superblock
  *
@@ -3624,7 +3628,6 @@ EXPORT_SYMBOL_GPL(md_rdev_init);
  */
 static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor)
 {
-	static struct md_rdev claim_rdev; /* just for claiming the bdev */
 	struct md_rdev *rdev;
 	sector_t size;
 	int err;
@@ -3640,8 +3643,7 @@ static struct md_rdev *md_import_device(dev_t newdev, int super_format, int supe
 	if (err)
 		goto out_clear_rdev;
 
-	rdev->bdev = blkdev_get_by_dev(newdev,
-			FMODE_READ | FMODE_WRITE | FMODE_EXCL,
+	rdev->bdev = blkdev_get_by_dev(newdev, FMODE_READ | FMODE_WRITE,
 			super_format == -2 ? &claim_rdev : rdev, NULL);
 	if (IS_ERR(rdev->bdev)) {
 		pr_warn("md: could not open device unknown-block(%u,%u).\n",
@@ -3679,7 +3681,7 @@ static struct md_rdev *md_import_device(dev_t newdev, int super_format, int supe
 	return rdev;
 
 out_blkdev_put:
-	blkdev_put(rdev->bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL);
+	blkdev_put(rdev->bdev, super_format == -2 ? &claim_rdev : rdev);
 out_clear_rdev:
 	md_rdev_clear(rdev);
 out_free_rdev:
@@ -4560,7 +4562,7 @@ new_dev_store(struct mddev *mddev, const char *buf, size_t len)
 	err = bind_rdev_to_array(rdev, mddev);
  out:
 	if (err)
-		export_rdev(rdev);
+		export_rdev(rdev, mddev);
 	mddev_unlock(mddev);
 	if (!err)
 		md_new_event();
@@ -6498,7 +6500,7 @@ static void autorun_devices(int part)
 			rdev_for_each_list(rdev, tmp, &candidates) {
 				list_del_init(&rdev->same_set);
 				if (bind_rdev_to_array(rdev, mddev))
-					export_rdev(rdev);
+					export_rdev(rdev, mddev);
 			}
 			autorun_array(mddev);
 			mddev_unlock(mddev);
@@ -6508,7 +6510,7 @@ static void autorun_devices(int part)
 		 */
 		rdev_for_each_list(rdev, tmp, &candidates) {
 			list_del_init(&rdev->same_set);
-			export_rdev(rdev);
+			export_rdev(rdev, mddev);
 		}
 		mddev_put(mddev);
 	}
@@ -6696,13 +6698,13 @@ int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info)
 				pr_warn("md: %pg has different UUID to %pg\n",
 					rdev->bdev,
 					rdev0->bdev);
-				export_rdev(rdev);
+				export_rdev(rdev, mddev);
 				return -EINVAL;
 			}
 		}
 		err = bind_rdev_to_array(rdev, mddev);
 		if (err)
-			export_rdev(rdev);
+			export_rdev(rdev, mddev);
 		return err;
 	}
 
@@ -6746,7 +6748,7 @@ int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info)
 			/* This was a hot-add request, but events doesn't
 			 * match, so reject it.
 			 */
-			export_rdev(rdev);
+			export_rdev(rdev, mddev);
 			return -EINVAL;
 		}
 
@@ -6772,7 +6774,7 @@ int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info)
 				}
 			}
 			if (has_journal || mddev->bitmap) {
-				export_rdev(rdev);
+				export_rdev(rdev, mddev);
 				return -EBUSY;
 			}
 			set_bit(Journal, &rdev->flags);
@@ -6787,7 +6789,7 @@ int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info)
 				/* --add initiated by this node */
 				err = md_cluster_ops->add_new_disk(mddev, rdev);
 				if (err) {
-					export_rdev(rdev);
+					export_rdev(rdev, mddev);
 					return err;
 				}
 			}
@@ -6797,7 +6799,7 @@ int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info)
 		err = bind_rdev_to_array(rdev, mddev);
 
 		if (err)
-			export_rdev(rdev);
+			export_rdev(rdev, mddev);
 
 		if (mddev_is_clustered(mddev)) {
 			if (info->state & (1 << MD_DISK_CANDIDATE)) {
@@ -6860,7 +6862,7 @@ int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info)
 
 		err = bind_rdev_to_array(rdev, mddev);
 		if (err) {
-			export_rdev(rdev);
+			export_rdev(rdev, mddev);
 			return err;
 		}
 	}
@@ -6985,7 +6987,7 @@ static int hot_add_disk(struct mddev *mddev, dev_t dev)
 	return 0;
 
 abort_export:
-	export_rdev(rdev);
+	export_rdev(rdev, mddev);
 	return err;
 }
 
diff --git a/drivers/mtd/devices/block2mtd.c b/drivers/mtd/devices/block2mtd.c
index 218eb2af564a81..44fc23af4c3f84 100644
--- a/drivers/mtd/devices/block2mtd.c
+++ b/drivers/mtd/devices/block2mtd.c
@@ -209,7 +209,7 @@ static void block2mtd_free_device(struct block2mtd_dev *dev)
 	if (dev->blkdev) {
 		invalidate_mapping_pages(dev->blkdev->bd_inode->i_mapping,
 					0, -1);
-		blkdev_put(dev->blkdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
+		blkdev_put(dev->blkdev, NULL);
 	}
 
 	kfree(dev);
@@ -261,7 +261,7 @@ static struct block_device __ref *mdtblock_early_get_bdev(const char *devname,
 static struct block2mtd_dev *add_device(char *devname, int erase_size,
 		char *label, int timeout)
 {
-	const fmode_t mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL;
+	const fmode_t mode = FMODE_READ | FMODE_WRITE;
 	struct block_device *bdev;
 	struct block2mtd_dev *dev;
 	char *name;
diff --git a/drivers/nvme/target/io-cmd-bdev.c b/drivers/nvme/target/io-cmd-bdev.c
index 9b6d6d85c72544..65ed2d478fac89 100644
--- a/drivers/nvme/target/io-cmd-bdev.c
+++ b/drivers/nvme/target/io-cmd-bdev.c
@@ -51,7 +51,7 @@ void nvmet_bdev_set_limits(struct block_device *bdev, struct nvme_id_ns *id)
 void nvmet_bdev_ns_disable(struct nvmet_ns *ns)
 {
 	if (ns->bdev) {
-		blkdev_put(ns->bdev, FMODE_WRITE | FMODE_READ);
+		blkdev_put(ns->bdev, NULL);
 		ns->bdev = NULL;
 	}
 }
diff --git a/drivers/s390/block/dasd_genhd.c b/drivers/s390/block/dasd_genhd.c
index f21198bc483e1a..d2b27b84f854cc 100644
--- a/drivers/s390/block/dasd_genhd.c
+++ b/drivers/s390/block/dasd_genhd.c
@@ -179,7 +179,7 @@ void dasd_destroy_partitions(struct dasd_block *block)
 	mutex_unlock(&bdev->bd_disk->open_mutex);
 
 	/* Matching blkdev_put to the blkdev_get in dasd_scan_partitions. */
-	blkdev_put(bdev, FMODE_READ);
+	blkdev_put(bdev, NULL);
 }
 
 int dasd_gendisk_init(void)
diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index a5cbbefa78ee4e..c62f961f46e378 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -108,7 +108,7 @@ static int iblock_configure_device(struct se_device *dev)
 	pr_debug( "IBLOCK: Claiming struct block_device: %s\n",
 			ib_dev->ibd_udev_path);
 
-	mode = FMODE_READ|FMODE_EXCL;
+	mode = FMODE_READ;
 	if (!ib_dev->ibd_readonly)
 		mode |= FMODE_WRITE;
 	else
@@ -175,7 +175,7 @@ static int iblock_configure_device(struct se_device *dev)
 	return 0;
 
 out_blkdev_put:
-	blkdev_put(ib_dev->ibd_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL);
+	blkdev_put(ib_dev->ibd_bd, ib_dev);
 out_free_bioset:
 	bioset_exit(&ib_dev->ibd_bio_set);
 out:
@@ -201,7 +201,7 @@ static void iblock_destroy_device(struct se_device *dev)
 	struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
 
 	if (ib_dev->ibd_bd != NULL)
-		blkdev_put(ib_dev->ibd_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL);
+		blkdev_put(ib_dev->ibd_bd, ib_dev);
 	bioset_exit(&ib_dev->ibd_bio_set);
 }
 
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index e3494e036c6c85..da3b5512d7ae32 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -366,8 +366,7 @@ static int pscsi_create_type_disk(struct se_device *dev, struct scsi_device *sd)
 	 * Claim exclusive struct block_device access to struct scsi_device
 	 * for TYPE_DISK and TYPE_ZBC using supplied udev_path
 	 */
-	bd = blkdev_get_by_path(dev->udev_path,
-				FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv,
+	bd = blkdev_get_by_path(dev->udev_path, FMODE_WRITE | FMODE_READ, pdv,
 				NULL);
 	if (IS_ERR(bd)) {
 		pr_err("pSCSI: blkdev_get_by_path() failed\n");
@@ -378,7 +377,7 @@ static int pscsi_create_type_disk(struct se_device *dev, struct scsi_device *sd)
 
 	ret = pscsi_add_device_to_list(dev, sd);
 	if (ret) {
-		blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL);
+		blkdev_put(pdv->pdv_bd, pdv);
 		scsi_device_put(sd);
 		return ret;
 	}
@@ -566,8 +565,7 @@ static void pscsi_destroy_device(struct se_device *dev)
 		 */
 		if ((sd->type == TYPE_DISK || sd->type == TYPE_ZBC) &&
 		    pdv->pdv_bd) {
-			blkdev_put(pdv->pdv_bd,
-				   FMODE_WRITE|FMODE_READ|FMODE_EXCL);
+			blkdev_put(pdv->pdv_bd, pdv);
 			pdv->pdv_bd = NULL;
 		}
 		/*
diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index 4de4984fa99ba3..677e9d9e1527aa 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -257,7 +257,7 @@ static int btrfs_init_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
 		return -EINVAL;
 	}
 
-	bdev = blkdev_get_by_path(device_path, FMODE_WRITE | FMODE_EXCL,
+	bdev = blkdev_get_by_path(device_path, FMODE_WRITE,
 				  fs_info->bdev_holder, NULL);
 	if (IS_ERR(bdev)) {
 		btrfs_err(fs_info, "target device %s is invalid!", device_path);
@@ -315,7 +315,7 @@ static int btrfs_init_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
 	device->bdev = bdev;
 	set_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state);
 	set_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state);
-	device->mode = FMODE_EXCL;
+	device->holder = fs_info->bdev_holder;
 	device->dev_stats_valid = 1;
 	set_blocksize(device->bdev, BTRFS_BDEV_BLOCKSIZE);
 	device->fs_devices = fs_devices;
@@ -334,7 +334,7 @@ static int btrfs_init_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
 	return 0;
 
 error:
-	blkdev_put(bdev, FMODE_EXCL);
+	blkdev_put(bdev, fs_info->bdev_holder);
 	return ret;
 }
 
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 2fa36f694daa53..d99376a79ef43a 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2672,7 +2672,7 @@ static long btrfs_ioctl_rm_dev_v2(struct file *file, void __user *arg)
 	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
 	struct btrfs_ioctl_vol_args_v2 *vol_args;
 	struct block_device *bdev = NULL;
-	fmode_t mode;
+	void *holder;
 	int ret;
 	bool cancel = false;
 
@@ -2709,7 +2709,7 @@ static long btrfs_ioctl_rm_dev_v2(struct file *file, void __user *arg)
 		goto err_drop;
 
 	/* Exclusive operation is now claimed */
-	ret = btrfs_rm_device(fs_info, &args, &bdev, &mode);
+	ret = btrfs_rm_device(fs_info, &args, &bdev, &holder);
 
 	btrfs_exclop_finish(fs_info);
 
@@ -2724,7 +2724,7 @@ static long btrfs_ioctl_rm_dev_v2(struct file *file, void __user *arg)
 err_drop:
 	mnt_drop_write_file(file);
 	if (bdev)
-		blkdev_put(bdev, mode);
+		blkdev_put(bdev, holder);
 out:
 	btrfs_put_dev_args_from_path(&args);
 	kfree(vol_args);
@@ -2738,7 +2738,7 @@ static long btrfs_ioctl_rm_dev(struct file *file, void __user *arg)
 	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
 	struct btrfs_ioctl_vol_args *vol_args;
 	struct block_device *bdev = NULL;
-	fmode_t mode;
+	void *holder;
 	int ret;
 	bool cancel = false;
 
@@ -2765,7 +2765,7 @@ static long btrfs_ioctl_rm_dev(struct file *file, void __user *arg)
 	ret = exclop_start_or_cancel_reloc(fs_info, BTRFS_EXCLOP_DEV_REMOVE,
 					   cancel);
 	if (ret == 0) {
-		ret = btrfs_rm_device(fs_info, &args, &bdev, &mode);
+		ret = btrfs_rm_device(fs_info, &args, &bdev, &holder);
 		if (!ret)
 			btrfs_info(fs_info, "disk deleted %s", vol_args->name);
 		btrfs_exclop_finish(fs_info);
@@ -2773,7 +2773,7 @@ static long btrfs_ioctl_rm_dev(struct file *file, void __user *arg)
 
 	mnt_drop_write_file(file);
 	if (bdev)
-		blkdev_put(bdev, mode);
+		blkdev_put(bdev, holder);
 out:
 	btrfs_put_dev_args_from_path(&args);
 	kfree(vol_args);
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 035868cee3ddc3..7b12e05cdbf00b 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -507,14 +507,14 @@ btrfs_get_bdev_and_sb(const char *device_path, fmode_t flags, void *holder,
 		sync_blockdev(*bdev);
 	ret = set_blocksize(*bdev, BTRFS_BDEV_BLOCKSIZE);
 	if (ret) {
-		blkdev_put(*bdev, flags);
+		blkdev_put(*bdev, holder);
 		goto error;
 	}
 	invalidate_bdev(*bdev);
 	*disk_super = btrfs_read_dev_super(*bdev);
 	if (IS_ERR(*disk_super)) {
 		ret = PTR_ERR(*disk_super);
-		blkdev_put(*bdev, flags);
+		blkdev_put(*bdev, holder);
 		goto error;
 	}
 
@@ -642,7 +642,7 @@ static int btrfs_open_one_device(struct btrfs_fs_devices *fs_devices,
 
 	device->bdev = bdev;
 	clear_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state);
-	device->mode = flags;
+	device->holder = holder;
 
 	fs_devices->open_devices++;
 	if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state) &&
@@ -656,7 +656,7 @@ static int btrfs_open_one_device(struct btrfs_fs_devices *fs_devices,
 
 error_free_page:
 	btrfs_release_disk_super(disk_super);
-	blkdev_put(bdev, flags);
+	blkdev_put(bdev, holder);
 
 	return -EINVAL;
 }
@@ -1057,7 +1057,7 @@ static void __btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices,
 			continue;
 
 		if (device->bdev) {
-			blkdev_put(device->bdev, device->mode);
+			blkdev_put(device->bdev, device->holder);
 			device->bdev = NULL;
 			fs_devices->open_devices--;
 		}
@@ -1103,7 +1103,7 @@ static void btrfs_close_bdev(struct btrfs_device *device)
 		invalidate_bdev(device->bdev);
 	}
 
-	blkdev_put(device->bdev, device->mode);
+	blkdev_put(device->bdev, device->holder);
 }
 
 static void btrfs_close_one_device(struct btrfs_device *device)
@@ -1213,8 +1213,6 @@ static int open_fs_devices(struct btrfs_fs_devices *fs_devices,
 	struct btrfs_device *latest_dev = NULL;
 	struct btrfs_device *tmp_device;
 
-	flags |= FMODE_EXCL;
-
 	list_for_each_entry_safe(device, tmp_device, &fs_devices->devices,
 				 dev_list) {
 		int ret;
@@ -1400,7 +1398,7 @@ struct btrfs_device *btrfs_scan_one_device(const char *path, fmode_t flags)
 	btrfs_release_disk_super(disk_super);
 
 error_bdev_put:
-	blkdev_put(bdev, flags);
+	blkdev_put(bdev, NULL);
 
 	return device;
 }
@@ -2087,7 +2085,7 @@ void btrfs_scratch_superblocks(struct btrfs_fs_info *fs_info,
 
 int btrfs_rm_device(struct btrfs_fs_info *fs_info,
 		    struct btrfs_dev_lookup_args *args,
-		    struct block_device **bdev, fmode_t *mode)
+		    struct block_device **bdev, void **holder)
 {
 	struct btrfs_trans_handle *trans;
 	struct btrfs_device *device;
@@ -2226,7 +2224,7 @@ int btrfs_rm_device(struct btrfs_fs_info *fs_info,
 	}
 
 	*bdev = device->bdev;
-	*mode = device->mode;
+	*holder = device->holder;
 	synchronize_rcu();
 	btrfs_free_device(device);
 
@@ -2394,7 +2392,7 @@ int btrfs_get_dev_args_from_path(struct btrfs_fs_info *fs_info,
 	else
 		memcpy(args->fsid, disk_super->fsid, BTRFS_FSID_SIZE);
 	btrfs_release_disk_super(disk_super);
-	blkdev_put(bdev, FMODE_READ);
+	blkdev_put(bdev, NULL);
 	return 0;
 }
 
@@ -2627,7 +2625,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
 	if (sb_rdonly(sb) && !fs_devices->seeding)
 		return -EROFS;
 
-	bdev = blkdev_get_by_path(device_path, FMODE_WRITE | FMODE_EXCL,
+	bdev = blkdev_get_by_path(device_path, FMODE_WRITE,
 				  fs_info->bdev_holder, NULL);
 	if (IS_ERR(bdev))
 		return PTR_ERR(bdev);
@@ -2690,7 +2688,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
 	device->commit_total_bytes = device->total_bytes;
 	set_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state);
 	clear_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state);
-	device->mode = FMODE_EXCL;
+	device->holder = fs_info->bdev_holder;
 	device->dev_stats_valid = 1;
 	set_blocksize(device->bdev, BTRFS_BDEV_BLOCKSIZE);
 
@@ -2848,7 +2846,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
 error_free_device:
 	btrfs_free_device(device);
 error:
-	blkdev_put(bdev, FMODE_EXCL);
+	blkdev_put(bdev, fs_info->bdev_holder);
 	if (locked) {
 		mutex_unlock(&uuid_mutex);
 		up_write(&sb->s_umount);
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index eb97a397b3c3fb..840a8df399072c 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -94,8 +94,8 @@ struct btrfs_device {
 
 	struct btrfs_zoned_device_info *zone_info;
 
-	/* the mode sent to blkdev_get */
-	fmode_t mode;
+	/* block device holder for blkdev_get/put */
+	void *holder;
 
 	/*
 	 * Device's major-minor number. Must be set even if the device is not
@@ -619,7 +619,7 @@ void btrfs_put_dev_args_from_path(struct btrfs_dev_lookup_args *args);
 void btrfs_free_device(struct btrfs_device *device);
 int btrfs_rm_device(struct btrfs_fs_info *fs_info,
 		    struct btrfs_dev_lookup_args *args,
-		    struct block_device **bdev, fmode_t *mode);
+		    struct block_device **bdev, void **holder);
 void __exit btrfs_cleanup_fs_uuids(void);
 int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len);
 int btrfs_grow_device(struct btrfs_trans_handle *trans,
diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index 6c263e9cd38b2a..54dba967a2d445 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -19,6 +19,7 @@
 #include <trace/events/erofs.h>
 
 static struct kmem_cache *erofs_inode_cachep __read_mostly;
+struct file_system_type erofs_fs_type;
 
 void _erofs_err(struct super_block *sb, const char *function,
 		const char *fmt, ...)
@@ -253,8 +254,8 @@ static int erofs_init_device(struct erofs_buf *buf, struct super_block *sb,
 			return PTR_ERR(fscache);
 		dif->fscache = fscache;
 	} else if (!sbi->devs->flatdev) {
-		bdev = blkdev_get_by_path(dif->path, FMODE_READ | FMODE_EXCL,
-					  sb->s_type, NULL);
+		bdev = blkdev_get_by_path(dif->path, FMODE_READ, sb->s_type,
+					  NULL);
 		if (IS_ERR(bdev))
 			return PTR_ERR(bdev);
 		dif->bdev = bdev;
@@ -877,7 +878,7 @@ static int erofs_release_device_info(int id, void *ptr, void *data)
 
 	fs_put_dax(dif->dax_dev, NULL);
 	if (dif->bdev)
-		blkdev_put(dif->bdev, FMODE_READ | FMODE_EXCL);
+		blkdev_put(dif->bdev, &erofs_fs_type);
 	erofs_fscache_unregister_cookie(dif->fscache);
 	dif->fscache = NULL;
 	kfree(dif->path);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 9070ea9154d727..92dd699139a3f7 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1112,7 +1112,7 @@ static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb)
 {
 	struct block_device *bdev;
 
-	bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb,
+	bdev = blkdev_get_by_dev(dev, FMODE_READ | FMODE_WRITE, sb,
 				 &ext4_holder_ops);
 	if (IS_ERR(bdev))
 		goto fail;
@@ -1128,17 +1128,12 @@ static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb)
 /*
  * Release the journal device
  */
-static void ext4_blkdev_put(struct block_device *bdev)
-{
-	blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
-}
-
 static void ext4_blkdev_remove(struct ext4_sb_info *sbi)
 {
 	struct block_device *bdev;
 	bdev = sbi->s_journal_bdev;
 	if (bdev) {
-		ext4_blkdev_put(bdev);
+		blkdev_put(bdev, sbi->s_es);
 		sbi->s_journal_bdev = NULL;
 	}
 }
@@ -5915,7 +5910,7 @@ static journal_t *ext4_get_dev_journal(struct super_block *sb,
 out_journal:
 	jbd2_journal_destroy(journal);
 out_bdev:
-	ext4_blkdev_put(bdev);
+	blkdev_put(bdev, sb);
 	return NULL;
 }
 
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 7c34ab082f1382..a5adb1d316e331 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1538,7 +1538,7 @@ static void destroy_device_list(struct f2fs_sb_info *sbi)
 	int i;
 
 	for (i = 0; i < sbi->s_ndevs; i++) {
-		blkdev_put(FDEV(i).bdev, FMODE_EXCL);
+		blkdev_put(FDEV(i).bdev, sbi->sb->s_type);
 #ifdef CONFIG_BLK_DEV_ZONED
 		kvfree(FDEV(i).blkz_seq);
 #endif
diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c
index 46d393c8088a74..82f70d46f4e544 100644
--- a/fs/jfs/jfs_logmgr.c
+++ b/fs/jfs/jfs_logmgr.c
@@ -1100,7 +1100,7 @@ int lmLogOpen(struct super_block *sb)
 	 * file systems to log may have n-to-1 relationship;
 	 */
 
-	bdev = blkdev_get_by_dev(sbi->logdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
+	bdev = blkdev_get_by_dev(sbi->logdev, FMODE_READ | FMODE_WRITE,
 				 log, NULL);
 	if (IS_ERR(bdev)) {
 		rc = PTR_ERR(bdev);
@@ -1141,7 +1141,7 @@ int lmLogOpen(struct super_block *sb)
 	lbmLogShutdown(log);
 
       close:		/* close external log device */
-	blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
+	blkdev_put(bdev, log);
 
       free:		/* free log descriptor */
 	mutex_unlock(&jfs_log_mutex);
@@ -1485,7 +1485,7 @@ int lmLogClose(struct super_block *sb)
 	bdev = log->bdev;
 	rc = lmLogShutdown(log);
 
-	blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
+	blkdev_put(bdev, log);
 
 	kfree(log);
 
diff --git a/fs/nfs/blocklayout/dev.c b/fs/nfs/blocklayout/dev.c
index 38b066ca699ed7..9be7f958f60e45 100644
--- a/fs/nfs/blocklayout/dev.c
+++ b/fs/nfs/blocklayout/dev.c
@@ -35,7 +35,7 @@ bl_free_device(struct pnfs_block_dev *dev)
 		}
 
 		if (dev->bdev)
-			blkdev_put(dev->bdev, FMODE_READ | FMODE_WRITE);
+			blkdev_put(dev->bdev, NULL);
 	}
 }
 
@@ -374,7 +374,7 @@ bl_parse_scsi(struct nfs_server *server, struct pnfs_block_dev *d,
 	return 0;
 
 out_blkdev_put:
-	blkdev_put(d->bdev, FMODE_READ | FMODE_WRITE);
+	blkdev_put(d->bdev, NULL);
 	return error;
 }
 
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 91bfbd973d1d53..61d5e79a5e81df 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -1278,7 +1278,7 @@ nilfs_mount(struct file_system_type *fs_type, int flags,
 {
 	struct nilfs_super_data sd;
 	struct super_block *s;
-	fmode_t mode = FMODE_READ | FMODE_EXCL;
+	fmode_t mode = FMODE_READ;
 	struct dentry *root_dentry;
 	int err, s_new = false;
 
@@ -1357,7 +1357,7 @@ nilfs_mount(struct file_system_type *fs_type, int flags,
 	}
 
 	if (!s_new)
-		blkdev_put(sd.bdev, mode);
+		blkdev_put(sd.bdev, fs_type);
 
 	return root_dentry;
 
@@ -1366,7 +1366,7 @@ nilfs_mount(struct file_system_type *fs_type, int flags,
 
  failed:
 	if (!s_new)
-		blkdev_put(sd.bdev, mode);
+		blkdev_put(sd.bdev, fs_type);
 	return ERR_PTR(err);
 }
 
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index 6b13b8c3f2b8af..c6ae9aee01edb9 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -1503,7 +1503,7 @@ static void o2hb_region_release(struct config_item *item)
 	}
 
 	if (reg->hr_bdev)
-		blkdev_put(reg->hr_bdev, FMODE_READ|FMODE_WRITE);
+		blkdev_put(reg->hr_bdev, NULL);
 
 	kfree(reg->hr_slots);
 
@@ -1893,7 +1893,7 @@ static ssize_t o2hb_region_dev_store(struct config_item *item,
 
 out3:
 	if (ret < 0) {
-		blkdev_put(reg->hr_bdev, FMODE_READ | FMODE_WRITE);
+		blkdev_put(reg->hr_bdev, NULL);
 		reg->hr_bdev = NULL;
 	}
 out2:
diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
index 5e4db9a0c8e5a3..905297ea55458d 100644
--- a/fs/reiserfs/journal.c
+++ b/fs/reiserfs/journal.c
@@ -2589,7 +2589,7 @@ static void release_journal_dev(struct super_block *super,
 			       struct reiserfs_journal *journal)
 {
 	if (journal->j_dev_bd != NULL) {
-		blkdev_put(journal->j_dev_bd, journal->j_dev_mode);
+		blkdev_put(journal->j_dev_bd, journal);
 		journal->j_dev_bd = NULL;
 	}
 }
@@ -2598,9 +2598,10 @@ static int journal_init_dev(struct super_block *super,
 			    struct reiserfs_journal *journal,
 			    const char *jdev_name)
 {
+	fmode_t blkdev_mode = FMODE_READ;
+	void *holder = journal;
 	int result;
 	dev_t jdev;
-	fmode_t blkdev_mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL;
 
 	result = 0;
 
@@ -2608,16 +2609,15 @@ static int journal_init_dev(struct super_block *super,
 	jdev = SB_ONDISK_JOURNAL_DEVICE(super) ?
 	    new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev;
 
-	if (bdev_read_only(super->s_bdev))
-		blkdev_mode = FMODE_READ;
+	if (!bdev_read_only(super->s_bdev))
+		blkdev_mode |= FMODE_WRITE;
 
 	/* there is no "jdev" option and journal is on separate device */
 	if ((!jdev_name || !jdev_name[0])) {
 		if (jdev == super->s_dev)
-			blkdev_mode &= ~FMODE_EXCL;
-		journal->j_dev_bd = blkdev_get_by_dev(jdev, blkdev_mode,
-						      journal, NULL);
-		journal->j_dev_mode = blkdev_mode;
+			holder = NULL;
+		journal->j_dev_bd = blkdev_get_by_dev(jdev, blkdev_mode, holder,
+						      NULL);
 		if (IS_ERR(journal->j_dev_bd)) {
 			result = PTR_ERR(journal->j_dev_bd);
 			journal->j_dev_bd = NULL;
@@ -2631,8 +2631,7 @@ static int journal_init_dev(struct super_block *super,
 		return 0;
 	}
 
-	journal->j_dev_mode = blkdev_mode;
-	journal->j_dev_bd = blkdev_get_by_path(jdev_name, blkdev_mode, journal,
+	journal->j_dev_bd = blkdev_get_by_path(jdev_name, blkdev_mode, holder,
 					       NULL);
 	if (IS_ERR(journal->j_dev_bd)) {
 		result = PTR_ERR(journal->j_dev_bd);
diff --git a/fs/reiserfs/reiserfs.h b/fs/reiserfs/reiserfs.h
index 1bccf6a2e908fb..55e85256aae834 100644
--- a/fs/reiserfs/reiserfs.h
+++ b/fs/reiserfs/reiserfs.h
@@ -300,7 +300,6 @@ struct reiserfs_journal {
 	struct reiserfs_journal_cnode *j_first;
 
 	struct block_device *j_dev_bd;
-	fmode_t j_dev_mode;
 
 	/* first block on s_dev of reserved area journal */
 	int j_1st_reserved_block;
diff --git a/fs/super.c b/fs/super.c
index f127589700ab25..8563794a8bc462 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -1255,7 +1255,7 @@ int get_tree_bdev(struct fs_context *fc,
 {
 	struct block_device *bdev;
 	struct super_block *s;
-	fmode_t mode = FMODE_READ | FMODE_EXCL;
+	fmode_t mode = FMODE_READ;
 	int error = 0;
 
 	if (!(fc->sb_flags & SB_RDONLY))
@@ -1279,7 +1279,7 @@ int get_tree_bdev(struct fs_context *fc,
 	if (bdev->bd_fsfreeze_count > 0) {
 		mutex_unlock(&bdev->bd_fsfreeze_mutex);
 		warnf(fc, "%pg: Can't mount, blockdev is frozen", bdev);
-		blkdev_put(bdev, mode);
+		blkdev_put(bdev, fc->fs_type);
 		return -EBUSY;
 	}
 
@@ -1288,7 +1288,7 @@ int get_tree_bdev(struct fs_context *fc,
 	s = sget_fc(fc, test_bdev_super_fc, set_bdev_super_fc);
 	mutex_unlock(&bdev->bd_fsfreeze_mutex);
 	if (IS_ERR(s)) {
-		blkdev_put(bdev, mode);
+		blkdev_put(bdev, fc->fs_type);
 		return PTR_ERR(s);
 	}
 
@@ -1297,7 +1297,7 @@ int get_tree_bdev(struct fs_context *fc,
 		if ((fc->sb_flags ^ s->s_flags) & SB_RDONLY) {
 			warnf(fc, "%pg: Can't mount, would change RO state", bdev);
 			deactivate_locked_super(s);
-			blkdev_put(bdev, mode);
+			blkdev_put(bdev, fc->fs_type);
 			return -EBUSY;
 		}
 
@@ -1309,7 +1309,7 @@ int get_tree_bdev(struct fs_context *fc,
 		 * holding an active reference.
 		 */
 		up_write(&s->s_umount);
-		blkdev_put(bdev, mode);
+		blkdev_put(bdev, fc->fs_type);
 		down_write(&s->s_umount);
 	} else {
 		s->s_mode = mode;
@@ -1344,7 +1344,7 @@ struct dentry *mount_bdev(struct file_system_type *fs_type,
 {
 	struct block_device *bdev;
 	struct super_block *s;
-	fmode_t mode = FMODE_READ | FMODE_EXCL;
+	fmode_t mode = FMODE_READ;
 	int error = 0;
 
 	if (!(flags & SB_RDONLY))
@@ -1386,7 +1386,7 @@ struct dentry *mount_bdev(struct file_system_type *fs_type,
 		 * holding an active reference.
 		 */
 		up_write(&s->s_umount);
-		blkdev_put(bdev, mode);
+		blkdev_put(bdev, fs_type);
 		down_write(&s->s_umount);
 	} else {
 		s->s_mode = mode;
@@ -1409,7 +1409,7 @@ struct dentry *mount_bdev(struct file_system_type *fs_type,
 error_s:
 	error = PTR_ERR(s);
 error_bdev:
-	blkdev_put(bdev, mode);
+	blkdev_put(bdev, fs_type);
 error:
 	return ERR_PTR(error);
 }
@@ -1418,13 +1418,11 @@ EXPORT_SYMBOL(mount_bdev);
 void kill_block_super(struct super_block *sb)
 {
 	struct block_device *bdev = sb->s_bdev;
-	fmode_t mode = sb->s_mode;
 
 	bdev->bd_super = NULL;
 	generic_shutdown_super(sb);
 	sync_blockdev(bdev);
-	WARN_ON_ONCE(!(mode & FMODE_EXCL));
-	blkdev_put(bdev, mode | FMODE_EXCL);
+	blkdev_put(bdev, sb->s_type);
 }
 
 EXPORT_SYMBOL(kill_block_super);
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 1b4bd5c88f4a11..3b7cf8268057fe 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -396,8 +396,8 @@ xfs_blkdev_get(
 {
 	int			error = 0;
 
-	*bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
-				    mp, &xfs_holder_ops);
+	*bdevp = blkdev_get_by_path(name, FMODE_READ | FMODE_WRITE, mp,
+				    &xfs_holder_ops);
 	if (IS_ERR(*bdevp)) {
 		error = PTR_ERR(*bdevp);
 		xfs_warn(mp, "Invalid device [%s], error=%d", name, error);
@@ -408,10 +408,11 @@ xfs_blkdev_get(
 
 STATIC void
 xfs_blkdev_put(
+	struct xfs_mount	*mp,
 	struct block_device	*bdev)
 {
 	if (bdev)
-		blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
+		blkdev_put(bdev, mp);
 }
 
 STATIC void
@@ -422,13 +423,13 @@ xfs_close_devices(
 		struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
 
 		xfs_free_buftarg(mp->m_logdev_targp);
-		xfs_blkdev_put(logdev);
+		xfs_blkdev_put(mp, logdev);
 	}
 	if (mp->m_rtdev_targp) {
 		struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
 
 		xfs_free_buftarg(mp->m_rtdev_targp);
-		xfs_blkdev_put(rtdev);
+		xfs_blkdev_put(mp, rtdev);
 	}
 	xfs_free_buftarg(mp->m_ddev_targp);
 }
@@ -503,10 +504,10 @@ xfs_open_devices(
  out_free_ddev_targ:
 	xfs_free_buftarg(mp->m_ddev_targp);
  out_close_rtdev:
-	xfs_blkdev_put(rtdev);
+	xfs_blkdev_put(mp, rtdev);
  out_close_logdev:
 	if (logdev && logdev != ddev)
-		xfs_blkdev_put(logdev);
+		xfs_blkdev_put(mp, logdev);
 	return error;
 }
 
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 25bdd0cc74dce4..d5b99796f12c11 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1480,7 +1480,7 @@ struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
 int bd_prepare_to_claim(struct block_device *bdev, void *holder,
 		const struct blk_holder_ops *hops);
 void bd_abort_claiming(struct block_device *bdev, void *holder);
-void blkdev_put(struct block_device *bdev, fmode_t mode);
+void blkdev_put(struct block_device *bdev, void *holder);
 
 /* just for blk-cgroup, don't use elsewhere */
 struct block_device *blkdev_get_no_open(dev_t dev);
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index 7ae95ec72f9902..f62e89d0d9068e 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -688,22 +688,18 @@ static int load_image_and_restore(bool snapshot_test)
 {
 	int error;
 	unsigned int flags;
-	fmode_t mode = FMODE_READ;
-
-	if (snapshot_test)
-		mode |= FMODE_EXCL;
 
 	pm_pr_dbg("Loading hibernation image.\n");
 
 	lock_device_hotplug();
 	error = create_basic_memory_bitmaps();
 	if (error) {
-		swsusp_close(mode);
+		swsusp_close(snapshot_test);
 		goto Unlock;
 	}
 
 	error = swsusp_read(&flags);
-	swsusp_close(mode);
+	swsusp_close(snapshot_test);
 	if (!error)
 		error = hibernation_restore(flags & SF_PLATFORM_MODE);
 
@@ -956,7 +952,7 @@ static int software_resume(void)
 	/* The snapshot device should not be opened while we're running */
 	if (!hibernate_acquire()) {
 		error = -EBUSY;
-		swsusp_close(FMODE_READ | FMODE_EXCL);
+		swsusp_close(false);
 		goto Unlock;
 	}
 
@@ -991,7 +987,7 @@ static int software_resume(void)
 	pm_pr_dbg("Hibernation image not present or could not be loaded.\n");
 	return error;
  Close_Finish:
-	swsusp_close(FMODE_READ | FMODE_EXCL);
+	swsusp_close(false);
 	goto Finish;
 }
 
diff --git a/kernel/power/power.h b/kernel/power/power.h
index 978189fcafd124..a8e0c44b804e6c 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -177,7 +177,7 @@ int swsusp_check(bool snapshot_test);
 extern void swsusp_free(void);
 extern int swsusp_read(unsigned int *flags_p);
 extern int swsusp_write(unsigned int flags);
-extern void swsusp_close(fmode_t);
+void swsusp_close(bool snapshot_test);
 #ifdef CONFIG_SUSPEND
 extern int swsusp_unmark(void);
 #endif
diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index b03ff1a33c7f68..cc9259307c942a 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -363,7 +363,7 @@ static int swsusp_swap_check(void)
 
 	res = set_blocksize(hib_resume_bdev, PAGE_SIZE);
 	if (res < 0)
-		blkdev_put(hib_resume_bdev, FMODE_WRITE);
+		blkdev_put(hib_resume_bdev, NULL);
 
 	return res;
 }
@@ -443,7 +443,7 @@ static int get_swap_writer(struct swap_map_handle *handle)
 err_rel:
 	release_swap_writer(handle);
 err_close:
-	swsusp_close(FMODE_WRITE);
+	swsusp_close(false);
 	return ret;
 }
 
@@ -508,7 +508,7 @@ static int swap_writer_finish(struct swap_map_handle *handle,
 	if (error)
 		free_all_swap_pages(root_swap);
 	release_swap_writer(handle);
-	swsusp_close(FMODE_WRITE);
+	swsusp_close(false);
 
 	return error;
 }
@@ -1518,14 +1518,11 @@ static void *swsusp_holder;
 
 int swsusp_check(bool snapshot_test)
 {
+	void *holder = snapshot_test ? &swsusp_holder : NULL;
 	int error;
-	fmode_t mode = FMODE_READ;
 
-	if (snapshot_test)
-		mode |= FMODE_EXCL;
-
-	hib_resume_bdev = blkdev_get_by_dev(swsusp_resume_device,
-					    mode, &swsusp_holder, NULL);
+	hib_resume_bdev = blkdev_get_by_dev(swsusp_resume_device, FMODE_READ,
+					    holder, NULL);
 	if (!IS_ERR(hib_resume_bdev)) {
 		set_blocksize(hib_resume_bdev, PAGE_SIZE);
 		clear_page(swsusp_header);
@@ -1552,7 +1549,7 @@ int swsusp_check(bool snapshot_test)
 
 put:
 		if (error)
-			blkdev_put(hib_resume_bdev, mode);
+			blkdev_put(hib_resume_bdev, holder);
 		else
 			pr_debug("Image signature found, resuming\n");
 	} else {
@@ -1569,14 +1566,14 @@ int swsusp_check(bool snapshot_test)
  *	swsusp_close - close swap device.
  */
 
-void swsusp_close(fmode_t mode)
+void swsusp_close(bool snapshot_test)
 {
 	if (IS_ERR(hib_resume_bdev)) {
 		pr_debug("Image device not initialised\n");
 		return;
 	}
 
-	blkdev_put(hib_resume_bdev, mode);
+	blkdev_put(hib_resume_bdev, snapshot_test ? &swsusp_holder : NULL);
 }
 
 /**
diff --git a/mm/swapfile.c b/mm/swapfile.c
index cfbcf7d5705f5f..16554256be6554 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -2539,7 +2539,7 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
 		struct block_device *bdev = I_BDEV(inode);
 
 		set_blocksize(bdev, old_block_size);
-		blkdev_put(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL);
+		blkdev_put(bdev, p);
 	}
 
 	inode_lock(inode);
@@ -2770,8 +2770,7 @@ static int claim_swapfile(struct swap_info_struct *p, struct inode *inode)
 
 	if (S_ISBLK(inode->i_mode)) {
 		p->bdev = blkdev_get_by_dev(inode->i_rdev,
-				   FMODE_READ | FMODE_WRITE | FMODE_EXCL, p,
-				   NULL);
+				   FMODE_READ | FMODE_WRITE, p, NULL);
 		if (IS_ERR(p->bdev)) {
 			error = PTR_ERR(p->bdev);
 			p->bdev = NULL;
@@ -3222,7 +3221,7 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
 	p->cluster_next_cpu = NULL;
 	if (inode && S_ISBLK(inode->i_mode) && p->bdev) {
 		set_blocksize(p->bdev, p->old_block_size);
-		blkdev_put(p->bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL);
+		blkdev_put(p->bdev, p);
 	}
 	inode = NULL;
 	destroy_swap_extents(p);
-- 
2.39.2

Re: [PATCH 16/31] block: use the holder as indication for exclusive opens

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:35AM +0200, Christoph Hellwig wrote:
> The current interface for exclusive opens is rather confusing as it
> requires both the FMODE_EXCL flag and a holder.  Remove the need to pass
> FMODE_EXCL and just key off the exclusive open off a non-NULL holder.
> 
> For blkdev_put this requires adding the holder argument, which provides
> better debug checking that only the holder actually releases the hold,
> but at the same time allows removing the now superfluous mode argument.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 16/31] block: use the holder as indication for exclusive opens

[Jinpu Wang]

On Tue, Jun 6, 2023 at 9:40 AM Christoph Hellwig <hch@lst.de> wrote:
>
> The current interface for exclusive opens is rather confusing as it
> requires both the FMODE_EXCL flag and a holder.  Remove the need to pass
> FMODE_EXCL and just key off the exclusive open off a non-NULL holder.
>
> For blkdev_put this requires adding the holder argument, which provides
> better debug checking that only the holder actually releases the hold,
> but at the same time allows removing the now superfluous mode argument.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  block/bdev.c                        | 37 ++++++++++++++++------------
>  block/fops.c                        |  6 +++--
>  block/genhd.c                       |  5 ++--
>  block/ioctl.c                       |  5 ++--
>  drivers/block/drbd/drbd_nl.c        | 23 ++++++++++-------
>  drivers/block/pktcdvd.c             | 13 +++++-----
>  drivers/block/rnbd/rnbd-srv.c       |  4 +--
Acked-by: Jack Wang <jinpu.wang@ionos.com> # for rnbd

Re: [PATCH 16/31] block: use the holder as indication for exclusive opens

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> The current interface for exclusive opens is rather confusing as it
> requires both the FMODE_EXCL flag and a holder.  Remove the need to pass
> FMODE_EXCL and just key off the exclusive open off a non-NULL holder.
> 
> For blkdev_put this requires adding the holder argument, which provides
> better debug checking that only the holder actually releases the hold,
> but at the same time allows removing the now superfluous mode argument.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   block/bdev.c                        | 37 ++++++++++++++++------------
>   block/fops.c                        |  6 +++--
>   block/genhd.c                       |  5 ++--
>   block/ioctl.c                       |  5 ++--
>   drivers/block/drbd/drbd_nl.c        | 23 ++++++++++-------
>   drivers/block/pktcdvd.c             | 13 +++++-----
>   drivers/block/rnbd/rnbd-srv.c       |  4 +--
>   drivers/block/xen-blkback/xenbus.c  |  2 +-
>   drivers/block/zram/zram_drv.c       |  8 +++---
>   drivers/md/bcache/super.c           | 15 ++++++------
>   drivers/md/dm.c                     |  6 ++---
>   drivers/md/md.c                     | 38 +++++++++++++++--------------
>   drivers/mtd/devices/block2mtd.c     |  4 +--
>   drivers/nvme/target/io-cmd-bdev.c   |  2 +-
>   drivers/s390/block/dasd_genhd.c     |  2 +-
>   drivers/target/target_core_iblock.c |  6 ++---
>   drivers/target/target_core_pscsi.c  |  8 +++---
>   fs/btrfs/dev-replace.c              |  6 ++---
>   fs/btrfs/ioctl.c                    | 12 ++++-----
>   fs/btrfs/volumes.c                  | 28 ++++++++++-----------
>   fs/btrfs/volumes.h                  |  6 ++---
>   fs/erofs/super.c                    |  7 +++---
>   fs/ext4/super.c                     | 11 +++------
>   fs/f2fs/super.c                     |  2 +-
>   fs/jfs/jfs_logmgr.c                 |  6 ++---
>   fs/nfs/blocklayout/dev.c            |  4 +--
>   fs/nilfs2/super.c                   |  6 ++---
>   fs/ocfs2/cluster/heartbeat.c        |  4 +--
>   fs/reiserfs/journal.c               | 19 +++++++--------
>   fs/reiserfs/reiserfs.h              |  1 -
>   fs/super.c                          | 20 +++++++--------
>   fs/xfs/xfs_super.c                  | 15 ++++++------
>   include/linux/blkdev.h              |  2 +-
>   kernel/power/hibernate.c            | 12 +++------
>   kernel/power/power.h                |  2 +-
>   kernel/power/swap.c                 | 21 +++++++---------
>   mm/swapfile.c                       |  7 +++---
>   37 files changed, 183 insertions(+), 192 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

Re: [PATCH 16/31] block: use the holder as indication for exclusive opens

[David Sterba]

On Tue, Jun 06, 2023 at 09:39:35AM +0200, Christoph Hellwig wrote:
> The current interface for exclusive opens is rather confusing as it
> requires both the FMODE_EXCL flag and a holder.  Remove the need to pass
> FMODE_EXCL and just key off the exclusive open off a non-NULL holder.
> 
> For blkdev_put this requires adding the holder argument, which provides
> better debug checking that only the holder actually releases the hold,
> but at the same time allows removing the now superfluous mode argument.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  block/bdev.c                        | 37 ++++++++++++++++------------
>  block/fops.c                        |  6 +++--
>  block/genhd.c                       |  5 ++--
>  block/ioctl.c                       |  5 ++--
>  drivers/block/drbd/drbd_nl.c        | 23 ++++++++++-------
>  drivers/block/pktcdvd.c             | 13 +++++-----
>  drivers/block/rnbd/rnbd-srv.c       |  4 +--
>  drivers/block/xen-blkback/xenbus.c  |  2 +-
>  drivers/block/zram/zram_drv.c       |  8 +++---
>  drivers/md/bcache/super.c           | 15 ++++++------
>  drivers/md/dm.c                     |  6 ++---
>  drivers/md/md.c                     | 38 +++++++++++++++--------------
>  drivers/mtd/devices/block2mtd.c     |  4 +--
>  drivers/nvme/target/io-cmd-bdev.c   |  2 +-
>  drivers/s390/block/dasd_genhd.c     |  2 +-
>  drivers/target/target_core_iblock.c |  6 ++---
>  drivers/target/target_core_pscsi.c  |  8 +++---

For

>  fs/btrfs/dev-replace.c              |  6 ++---
>  fs/btrfs/ioctl.c                    | 12 ++++-----
>  fs/btrfs/volumes.c                  | 28 ++++++++++-----------
>  fs/btrfs/volumes.h                  |  6 ++---

Acked-by: David Sterba <dsterba@suse.com>

[PATCH 17/31] block: add a sb_open_mode helper

[Christoph Hellwig]

Add a helper to return the open flags for blkdev_get_by* for passed in
super block flags instead of open coding the logic in many places.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/btrfs/super.c       |  5 +----
 fs/nilfs2/super.c      |  7 ++-----
 fs/super.c             | 15 ++++-----------
 include/linux/blkdev.h |  7 +++++++
 4 files changed, 14 insertions(+), 20 deletions(-)

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 1a2ee9407f5414..fd02b92e39106a 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1440,12 +1440,9 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type,
 	struct btrfs_fs_devices *fs_devices = NULL;
 	struct btrfs_fs_info *fs_info = NULL;
 	void *new_sec_opts = NULL;
-	fmode_t mode = FMODE_READ;
+	fmode_t mode = sb_open_mode(flags);
 	int error = 0;
 
-	if (!(flags & SB_RDONLY))
-		mode |= FMODE_WRITE;
-
 	if (data) {
 		error = security_sb_eat_lsm_opts(data, &new_sec_opts);
 		if (error)
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 61d5e79a5e81df..a41fd84d4e28ab 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -1278,14 +1278,11 @@ nilfs_mount(struct file_system_type *fs_type, int flags,
 {
 	struct nilfs_super_data sd;
 	struct super_block *s;
-	fmode_t mode = FMODE_READ;
 	struct dentry *root_dentry;
 	int err, s_new = false;
 
-	if (!(flags & SB_RDONLY))
-		mode |= FMODE_WRITE;
-
-	sd.bdev = blkdev_get_by_path(dev_name, mode, fs_type, NULL);
+	sd.bdev = blkdev_get_by_path(dev_name, sb_open_mode(flags), fs_type,
+				     NULL);
 	if (IS_ERR(sd.bdev))
 		return ERR_CAST(sd.bdev);
 
diff --git a/fs/super.c b/fs/super.c
index 8563794a8bc462..dc7f328398339d 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -1255,17 +1255,13 @@ int get_tree_bdev(struct fs_context *fc,
 {
 	struct block_device *bdev;
 	struct super_block *s;
-	fmode_t mode = FMODE_READ;
 	int error = 0;
 
-	if (!(fc->sb_flags & SB_RDONLY))
-		mode |= FMODE_WRITE;
-
 	if (!fc->source)
 		return invalf(fc, "No source specified");
 
-	bdev = blkdev_get_by_path(fc->source, mode, fc->fs_type,
-				  &fs_holder_ops);
+	bdev = blkdev_get_by_path(fc->source, sb_open_mode(fc->sb_flags),
+				  fc->fs_type, &fs_holder_ops);
 	if (IS_ERR(bdev)) {
 		errorf(fc, "%s: Can't open blockdev", fc->source);
 		return PTR_ERR(bdev);
@@ -1344,13 +1340,10 @@ struct dentry *mount_bdev(struct file_system_type *fs_type,
 {
 	struct block_device *bdev;
 	struct super_block *s;
-	fmode_t mode = FMODE_READ;
 	int error = 0;
 
-	if (!(flags & SB_RDONLY))
-		mode |= FMODE_WRITE;
-
-	bdev = blkdev_get_by_path(dev_name, mode, fs_type, &fs_holder_ops);
+	bdev = blkdev_get_by_path(dev_name, sb_open_mode(flags), fs_type,
+				  &fs_holder_ops);
 	if (IS_ERR(bdev))
 		return ERR_CAST(bdev);
 
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index d5b99796f12c11..97803603902076 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1473,6 +1473,13 @@ struct blk_holder_ops {
 	void (*mark_dead)(struct block_device *bdev);
 };
 
+/*
+ * Return the correct open flags for blkdev_get_by_* for super block flags
+ * as stored in sb->s_flags.
+ */
+#define sb_open_mode(flags) \
+	(FMODE_READ | (((flags) & SB_RDONLY) ? 0 : FMODE_WRITE))
+
 struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
 		const struct blk_holder_ops *hops);
 struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
-- 
2.39.2

Re: [PATCH 17/31] block: add a sb_open_mode helper

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:36AM +0200, Christoph Hellwig wrote:
> Add a helper to return the open flags for blkdev_get_by* for passed in
> super block flags instead of open coding the logic in many places.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 17/31] block: add a sb_open_mode helper

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> Add a helper to return the open flags for blkdev_get_by* for passed in
> super block flags instead of open coding the logic in many places.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   fs/btrfs/super.c       |  5 +----
>   fs/nilfs2/super.c      |  7 ++-----
>   fs/super.c             | 15 ++++-----------
>   include/linux/blkdev.h |  7 +++++++
>   4 files changed, 14 insertions(+), 20 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

[PATCH 18/31] fs: remove sb->s_mode

[Christoph Hellwig]

There is no real need to store the open mode in the super_block now.
It is only used by f2fs, which can easily recalculate it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/f2fs/super.c    | 10 ++++++----
 fs/nilfs2/super.c  |  1 -
 fs/super.c         |  2 --
 include/linux/fs.h |  1 -
 4 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index a5adb1d316e331..5a764fecd1c7ef 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -3993,6 +3993,7 @@ static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
 	struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
 	unsigned int max_devices = MAX_DEVICES;
 	unsigned int logical_blksize;
+	fmode_t mode = sb_open_mode(sbi->sb->s_flags);
 	int i;
 
 	/* Initialize single device information */
@@ -4024,8 +4025,8 @@ static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
 		if (max_devices == 1) {
 			/* Single zoned block device mount */
 			FDEV(0).bdev =
-				blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
-					sbi->sb->s_mode, sbi->sb->s_type, NULL);
+				blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev, mode,
+						  sbi->sb->s_type, NULL);
 		} else {
 			/* Multi-device mount */
 			memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
@@ -4043,8 +4044,9 @@ static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
 					(FDEV(i).total_segments <<
 					sbi->log_blocks_per_seg) - 1;
 			}
-			FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
-					sbi->sb->s_mode, sbi->sb->s_type, NULL);
+			FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path, mode,
+							  sbi->sb->s_type,
+							  NULL);
 		}
 		if (IS_ERR(FDEV(i).bdev))
 			return PTR_ERR(FDEV(i).bdev);
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index a41fd84d4e28ab..15a5a1099427d8 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -1316,7 +1316,6 @@ nilfs_mount(struct file_system_type *fs_type, int flags,
 		s_new = true;
 
 		/* New superblock instance created */
-		s->s_mode = mode;
 		snprintf(s->s_id, sizeof(s->s_id), "%pg", sd.bdev);
 		sb_set_blocksize(s, block_size(sd.bdev));
 
diff --git a/fs/super.c b/fs/super.c
index dc7f328398339d..86f40f8981989d 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -1308,7 +1308,6 @@ int get_tree_bdev(struct fs_context *fc,
 		blkdev_put(bdev, fc->fs_type);
 		down_write(&s->s_umount);
 	} else {
-		s->s_mode = mode;
 		snprintf(s->s_id, sizeof(s->s_id), "%pg", bdev);
 		shrinker_debugfs_rename(&s->s_shrink, "sb-%s:%s",
 					fc->fs_type->name, s->s_id);
@@ -1382,7 +1381,6 @@ struct dentry *mount_bdev(struct file_system_type *fs_type,
 		blkdev_put(bdev, fs_type);
 		down_write(&s->s_umount);
 	} else {
-		s->s_mode = mode;
 		snprintf(s->s_id, sizeof(s->s_id), "%pg", bdev);
 		shrinker_debugfs_rename(&s->s_shrink, "sb-%s:%s",
 					fs_type->name, s->s_id);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 7b2053649820cc..ad1d2c9afb3fa4 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1215,7 +1215,6 @@ struct super_block {
 	uuid_t			s_uuid;		/* UUID */
 
 	unsigned int		s_max_links;
-	fmode_t			s_mode;
 
 	/*
 	 * The next field is for VFS *only*. No filesystems have any business
-- 
2.39.2

Re: [PATCH 18/31] fs: remove sb->s_mode

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:37AM +0200, Christoph Hellwig wrote:
> There is no real need to store the open mode in the super_block now.
> It is only used by f2fs, which can easily recalculate it.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 18/31] fs: remove sb->s_mode

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> There is no real need to store the open mode in the super_block now.
> It is only used by f2fs, which can easily recalculate it.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   fs/f2fs/super.c    | 10 ++++++----
>   fs/nilfs2/super.c  |  1 -
>   fs/super.c         |  2 --
>   include/linux/fs.h |  1 -
>   4 files changed, 6 insertions(+), 8 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

[PATCH 19/31] scsi: replace the fmode_t argument to scsi_cmd_allowed with a simple bool

[Christoph Hellwig]

Instead of passing a fmode_t and only checking it for FMODE_WRITE, pass
a bool open_for_write to prepare for callers that won't have the fmode_t.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/scsi/scsi_bsg.c   | 2 +-
 drivers/scsi/scsi_ioctl.c | 8 ++++----
 drivers/scsi/sg.c         | 2 +-
 include/scsi/scsi_ioctl.h | 2 +-
 4 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/scsi/scsi_bsg.c b/drivers/scsi/scsi_bsg.c
index 96ee35256a168f..12431f35f861e1 100644
--- a/drivers/scsi/scsi_bsg.c
+++ b/drivers/scsi/scsi_bsg.c
@@ -42,7 +42,7 @@ static int scsi_bsg_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr,
 	if (copy_from_user(scmd->cmnd, uptr64(hdr->request), scmd->cmd_len))
 		goto out_put_request;
 	ret = -EPERM;
-	if (!scsi_cmd_allowed(scmd->cmnd, mode))
+	if (!scsi_cmd_allowed(scmd->cmnd, mode & FMODE_WRITE))
 		goto out_put_request;
 
 	ret = 0;
diff --git a/drivers/scsi/scsi_ioctl.c b/drivers/scsi/scsi_ioctl.c
index e3b31d32b6a92e..dda5468ca97f90 100644
--- a/drivers/scsi/scsi_ioctl.c
+++ b/drivers/scsi/scsi_ioctl.c
@@ -248,7 +248,7 @@ static int scsi_send_start_stop(struct scsi_device *sdev, int data)
  * Only a subset of commands are allowed for unprivileged users. Commands used
  * to format the media, update the firmware, etc. are not permitted.
  */
-bool scsi_cmd_allowed(unsigned char *cmd, fmode_t mode)
+bool scsi_cmd_allowed(unsigned char *cmd, bool open_for_write)
 {
 	/* root can do any command. */
 	if (capable(CAP_SYS_RAWIO))
@@ -338,7 +338,7 @@ bool scsi_cmd_allowed(unsigned char *cmd, fmode_t mode)
 	case GPCMD_SET_READ_AHEAD:
 	/* ZBC */
 	case ZBC_OUT:
-		return (mode & FMODE_WRITE);
+		return open_for_write;
 	default:
 		return false;
 	}
@@ -354,7 +354,7 @@ static int scsi_fill_sghdr_rq(struct scsi_device *sdev, struct request *rq,
 		return -EMSGSIZE;
 	if (copy_from_user(scmd->cmnd, hdr->cmdp, hdr->cmd_len))
 		return -EFAULT;
-	if (!scsi_cmd_allowed(scmd->cmnd, mode))
+	if (!scsi_cmd_allowed(scmd->cmnd, mode & FMODE_WRITE))
 		return -EPERM;
 	scmd->cmd_len = hdr->cmd_len;
 
@@ -554,7 +554,7 @@ static int sg_scsi_ioctl(struct request_queue *q, fmode_t mode,
 		goto error;
 
 	err = -EPERM;
-	if (!scsi_cmd_allowed(scmd->cmnd, mode))
+	if (!scsi_cmd_allowed(scmd->cmnd, mode & FMODE_WRITE))
 		goto error;
 
 	/* default.  possible overridden later */
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 037f8c98a6d364..e49ea693d0b656 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -237,7 +237,7 @@ static int sg_allow_access(struct file *filp, unsigned char *cmd)
 
 	if (sfp->parentdp->device->type == TYPE_SCANNER)
 		return 0;
-	if (!scsi_cmd_allowed(cmd, filp->f_mode))
+	if (!scsi_cmd_allowed(cmd, filp->f_mode & FMODE_WRITE))
 		return -EPERM;
 	return 0;
 }
diff --git a/include/scsi/scsi_ioctl.h b/include/scsi/scsi_ioctl.h
index beac64e38b8746..914201a8cb947c 100644
--- a/include/scsi/scsi_ioctl.h
+++ b/include/scsi/scsi_ioctl.h
@@ -49,7 +49,7 @@ int scsi_ioctl(struct scsi_device *sdev, fmode_t mode, int cmd,
 		void __user *arg);
 int get_sg_io_hdr(struct sg_io_hdr *hdr, const void __user *argp);
 int put_sg_io_hdr(const struct sg_io_hdr *hdr, void __user *argp);
-bool scsi_cmd_allowed(unsigned char *cmd, fmode_t mode);
+bool scsi_cmd_allowed(unsigned char *cmd, bool open_for_write);
 
 #endif /* __KERNEL__ */
 #endif /* _SCSI_IOCTL_H */
-- 
2.39.2

Re: [PATCH 19/31] scsi: replace the fmode_t argument to scsi_cmd_allowed with a simple bool

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:38AM +0200, Christoph Hellwig wrote:
> Instead of passing a fmode_t and only checking it for FMODE_WRITE, pass
> a bool open_for_write to prepare for callers that won't have the fmode_t.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 19/31] scsi: replace the fmode_t argument to scsi_cmd_allowed with a simple bool

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> Instead of passing a fmode_t and only checking it for FMODE_WRITE, pass
> a bool open_for_write to prepare for callers that won't have the fmode_t.
> 
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
> ---
>   drivers/scsi/scsi_bsg.c   | 2 +-
>   drivers/scsi/scsi_ioctl.c | 8 ++++----
>   drivers/scsi/sg.c         | 2 +-
>   include/scsi/scsi_ioctl.h | 2 +-
>   4 files changed, 7 insertions(+), 7 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare-l3A5Bk7waGM@public.gmane.org>

Cheers,

Hannes

Re: [PATCH 19/31] scsi: replace the fmode_t argument to scsi_cmd_allowed with a simple bool

[Martin K. Petersen]

Christoph,

> Instead of passing a fmode_t and only checking it for FMODE_WRITE, pass
> a bool open_for_write to prepare for callers that won't have the fmode_t.

Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>

-- 
Martin K. Petersen	Oracle Linux Engineering

[PATCH 20/31] scsi: replace the fmode_t argument to scsi_ioctl with a simple bool

[Christoph Hellwig]

Instead of passing a fmode_t and only checking it for FMODE_WRITE, pass
a bool open_for_write to prepare for callers that won't have the fmode_t.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/scsi/ch.c         |  3 ++-
 drivers/scsi/scsi_ioctl.c | 34 +++++++++++++++++-----------------
 drivers/scsi/sd.c         |  2 +-
 drivers/scsi/sg.c         |  5 +++--
 drivers/scsi/sr.c         |  2 +-
 drivers/scsi/st.c         |  2 +-
 include/scsi/scsi_ioctl.h |  2 +-
 7 files changed, 26 insertions(+), 24 deletions(-)

diff --git a/drivers/scsi/ch.c b/drivers/scsi/ch.c
index ac648bb8f7e7f4..cb0a399be1ccee 100644
--- a/drivers/scsi/ch.c
+++ b/drivers/scsi/ch.c
@@ -877,7 +877,8 @@ static long ch_ioctl(struct file *file,
 	}
 
 	default:
-		return scsi_ioctl(ch->device, file->f_mode, cmd, argp);
+		return scsi_ioctl(ch->device, file->f_mode & FMODE_WRITE, cmd,
+				  argp);
 
 	}
 }
diff --git a/drivers/scsi/scsi_ioctl.c b/drivers/scsi/scsi_ioctl.c
index dda5468ca97f90..6f6c5973c3ea95 100644
--- a/drivers/scsi/scsi_ioctl.c
+++ b/drivers/scsi/scsi_ioctl.c
@@ -346,7 +346,7 @@ bool scsi_cmd_allowed(unsigned char *cmd, bool open_for_write)
 EXPORT_SYMBOL(scsi_cmd_allowed);
 
 static int scsi_fill_sghdr_rq(struct scsi_device *sdev, struct request *rq,
-		struct sg_io_hdr *hdr, fmode_t mode)
+		struct sg_io_hdr *hdr, bool open_for_write)
 {
 	struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq);
 
@@ -354,7 +354,7 @@ static int scsi_fill_sghdr_rq(struct scsi_device *sdev, struct request *rq,
 		return -EMSGSIZE;
 	if (copy_from_user(scmd->cmnd, hdr->cmdp, hdr->cmd_len))
 		return -EFAULT;
-	if (!scsi_cmd_allowed(scmd->cmnd, mode & FMODE_WRITE))
+	if (!scsi_cmd_allowed(scmd->cmnd, open_for_write))
 		return -EPERM;
 	scmd->cmd_len = hdr->cmd_len;
 
@@ -407,7 +407,8 @@ static int scsi_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
 	return ret;
 }
 
-static int sg_io(struct scsi_device *sdev, struct sg_io_hdr *hdr, fmode_t mode)
+static int sg_io(struct scsi_device *sdev, struct sg_io_hdr *hdr,
+		bool open_for_write)
 {
 	unsigned long start_time;
 	ssize_t ret = 0;
@@ -448,7 +449,7 @@ static int sg_io(struct scsi_device *sdev, struct sg_io_hdr *hdr, fmode_t mode)
 		goto out_put_request;
 	}
 
-	ret = scsi_fill_sghdr_rq(sdev, rq, hdr, mode);
+	ret = scsi_fill_sghdr_rq(sdev, rq, hdr, open_for_write);
 	if (ret < 0)
 		goto out_put_request;
 
@@ -477,8 +478,7 @@ static int sg_io(struct scsi_device *sdev, struct sg_io_hdr *hdr, fmode_t mode)
 /**
  * sg_scsi_ioctl  --  handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl
  * @q:		request queue to send scsi commands down
- * @mode:	mode used to open the file through which the ioctl has been
- *		submitted
+ * @open_for_write: is the file / block device opened for writing?
  * @sic:	userspace structure describing the command to perform
  *
  * Send down the scsi command described by @sic to the device below
@@ -501,7 +501,7 @@ static int sg_io(struct scsi_device *sdev, struct sg_io_hdr *hdr, fmode_t mode)
  *      Positive numbers returned are the compacted SCSI error codes (4
  *      bytes in one int) where the lowest byte is the SCSI status.
  */
-static int sg_scsi_ioctl(struct request_queue *q, fmode_t mode,
+static int sg_scsi_ioctl(struct request_queue *q, bool open_for_write,
 		struct scsi_ioctl_command __user *sic)
 {
 	struct request *rq;
@@ -554,7 +554,7 @@ static int sg_scsi_ioctl(struct request_queue *q, fmode_t mode,
 		goto error;
 
 	err = -EPERM;
-	if (!scsi_cmd_allowed(scmd->cmnd, mode & FMODE_WRITE))
+	if (!scsi_cmd_allowed(scmd->cmnd, open_for_write))
 		goto error;
 
 	/* default.  possible overridden later */
@@ -776,7 +776,7 @@ static int scsi_put_cdrom_generic_arg(const struct cdrom_generic_command *cgc,
 	return 0;
 }
 
-static int scsi_cdrom_send_packet(struct scsi_device *sdev, fmode_t mode,
+static int scsi_cdrom_send_packet(struct scsi_device *sdev, bool open_for_write,
 		void __user *arg)
 {
 	struct cdrom_generic_command cgc;
@@ -817,7 +817,7 @@ static int scsi_cdrom_send_packet(struct scsi_device *sdev, fmode_t mode,
 	hdr.cmdp = ((struct cdrom_generic_command __user *) arg)->cmd;
 	hdr.cmd_len = sizeof(cgc.cmd);
 
-	err = sg_io(sdev, &hdr, mode);
+	err = sg_io(sdev, &hdr, open_for_write);
 	if (err == -EFAULT)
 		return -EFAULT;
 
@@ -832,7 +832,7 @@ static int scsi_cdrom_send_packet(struct scsi_device *sdev, fmode_t mode,
 	return err;
 }
 
-static int scsi_ioctl_sg_io(struct scsi_device *sdev, fmode_t mode,
+static int scsi_ioctl_sg_io(struct scsi_device *sdev, bool open_for_write,
 		void __user *argp)
 {
 	struct sg_io_hdr hdr;
@@ -841,7 +841,7 @@ static int scsi_ioctl_sg_io(struct scsi_device *sdev, fmode_t mode,
 	error = get_sg_io_hdr(&hdr, argp);
 	if (error)
 		return error;
-	error = sg_io(sdev, &hdr, mode);
+	error = sg_io(sdev, &hdr, open_for_write);
 	if (error == -EFAULT)
 		return error;
 	if (put_sg_io_hdr(&hdr, argp))
@@ -852,7 +852,7 @@ static int scsi_ioctl_sg_io(struct scsi_device *sdev, fmode_t mode,
 /**
  * scsi_ioctl - Dispatch ioctl to scsi device
  * @sdev: scsi device receiving ioctl
- * @mode: mode the block/char device is opened with
+ * @open_for_write: is the file / block device opened for writing?
  * @cmd: which ioctl is it
  * @arg: data associated with ioctl
  *
@@ -860,7 +860,7 @@ static int scsi_ioctl_sg_io(struct scsi_device *sdev, fmode_t mode,
  * does not take a major/minor number as the dev field.  Rather, it takes
  * a pointer to a &struct scsi_device.
  */
-int scsi_ioctl(struct scsi_device *sdev, fmode_t mode, int cmd,
+int scsi_ioctl(struct scsi_device *sdev, bool open_for_write, int cmd,
 		void __user *arg)
 {
 	struct request_queue *q = sdev->request_queue;
@@ -896,11 +896,11 @@ int scsi_ioctl(struct scsi_device *sdev, fmode_t mode, int cmd,
 	case SG_EMULATED_HOST:
 		return sg_emulated_host(q, arg);
 	case SG_IO:
-		return scsi_ioctl_sg_io(sdev, mode, arg);
+		return scsi_ioctl_sg_io(sdev, open_for_write, arg);
 	case SCSI_IOCTL_SEND_COMMAND:
-		return sg_scsi_ioctl(q, mode, arg);
+		return sg_scsi_ioctl(q, open_for_write, arg);
 	case CDROM_SEND_PACKET:
-		return scsi_cdrom_send_packet(sdev, mode, arg);
+		return scsi_cdrom_send_packet(sdev, open_for_write, arg);
 	case CDROMCLOSETRAY:
 		return scsi_send_start_stop(sdev, 3);
 	case CDROMEJECT:
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index c67c84f6ba6178..02b6704ec2b401 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1463,7 +1463,7 @@ static int sd_ioctl(struct block_device *bdev, fmode_t mode,
 
 	if (is_sed_ioctl(cmd))
 		return sed_ioctl(sdkp->opal_dev, cmd, p);
-	return scsi_ioctl(sdp, mode, cmd, p);
+	return scsi_ioctl(sdp, mode & FMODE_WRITE, cmd, p);
 }
 
 static void set_media_not_present(struct scsi_disk *sdkp)
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index e49ea693d0b656..138e28bb76b749 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1103,7 +1103,8 @@ sg_ioctl_common(struct file *filp, Sg_device *sdp, Sg_fd *sfp,
 	case SCSI_IOCTL_SEND_COMMAND:
 		if (atomic_read(&sdp->detaching))
 			return -ENODEV;
-		return scsi_ioctl(sdp->device, filp->f_mode, cmd_in, p);
+		return scsi_ioctl(sdp->device, filp->f_mode & FMODE_WRITE,
+				  cmd_in, p);
 	case SG_SET_DEBUG:
 		result = get_user(val, ip);
 		if (result)
@@ -1159,7 +1160,7 @@ sg_ioctl(struct file *filp, unsigned int cmd_in, unsigned long arg)
 	ret = sg_ioctl_common(filp, sdp, sfp, cmd_in, p);
 	if (ret != -ENOIOCTLCMD)
 		return ret;
-	return scsi_ioctl(sdp->device, filp->f_mode, cmd_in, p);
+	return scsi_ioctl(sdp->device, filp->f_mode & FMODE_WRITE, cmd_in, p);
 }
 
 static __poll_t
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 55082acb59bcaa..00aaafc8dd78f8 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -543,7 +543,7 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
 		if (ret != -ENOSYS)
 			goto put;
 	}
-	ret = scsi_ioctl(sdev, mode, cmd, argp);
+	ret = scsi_ioctl(sdev, mode & FMODE_WRITE, cmd, argp);
 
 put:
 	scsi_autopm_put_device(sdev);
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index b90a440e135dc4..14d7981ddcdd19 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -3832,7 +3832,7 @@ static long st_ioctl(struct file *file, unsigned int cmd_in, unsigned long arg)
 		break;
 	}
 
-	retval = scsi_ioctl(STp->device, file->f_mode, cmd_in, p);
+	retval = scsi_ioctl(STp->device, file->f_mode & FMODE_WRITE, cmd_in, p);
 	if (!retval && cmd_in == SCSI_IOCTL_STOP_UNIT) {
 		/* unload */
 		STp->rew_at_close = 0;
diff --git a/include/scsi/scsi_ioctl.h b/include/scsi/scsi_ioctl.h
index 914201a8cb947c..a207c07da9d20c 100644
--- a/include/scsi/scsi_ioctl.h
+++ b/include/scsi/scsi_ioctl.h
@@ -45,7 +45,7 @@ typedef struct scsi_fctargaddress {
 
 int scsi_ioctl_block_when_processing_errors(struct scsi_device *sdev,
 		int cmd, bool ndelay);
-int scsi_ioctl(struct scsi_device *sdev, fmode_t mode, int cmd,
+int scsi_ioctl(struct scsi_device *sdev, bool open_for_write, int cmd,
 		void __user *arg);
 int get_sg_io_hdr(struct sg_io_hdr *hdr, const void __user *argp);
 int put_sg_io_hdr(const struct sg_io_hdr *hdr, void __user *argp);
-- 
2.39.2

Re: [PATCH 20/31] scsi: replace the fmode_t argument to scsi_ioctl with a simple bool

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:39AM +0200, Christoph Hellwig wrote:
> Instead of passing a fmode_t and only checking it for FMODE_WRITE, pass
> a bool open_for_write to prepare for callers that won't have the fmode_t.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 20/31] scsi: replace the fmode_t argument to scsi_ioctl with a simple bool

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> Instead of passing a fmode_t and only checking it for FMODE_WRITE, pass
> a bool open_for_write to prepare for callers that won't have the fmode_t.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   drivers/scsi/ch.c         |  3 ++-
>   drivers/scsi/scsi_ioctl.c | 34 +++++++++++++++++-----------------
>   drivers/scsi/sd.c         |  2 +-
>   drivers/scsi/sg.c         |  5 +++--
>   drivers/scsi/sr.c         |  2 +-
>   drivers/scsi/st.c         |  2 +-
>   include/scsi/scsi_ioctl.h |  2 +-
>   7 files changed, 26 insertions(+), 24 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

Re: [PATCH 20/31] scsi: replace the fmode_t argument to scsi_ioctl with a simple bool

[Martin K. Petersen]

Christoph,

> Instead of passing a fmode_t and only checking it for FMODE_WRITE, pass
> a bool open_for_write to prepare for callers that won't have the fmode_t.

Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>

-- 
Martin K. Petersen	Oracle Linux Engineering

[PATCH 21/31] scsi: replace the fmode_t argument to ->sg_io_fn with a simple bool

[Christoph Hellwig]

Instead of passing a fmode_t and only checking it for FMODE_WRITE, pass
a bool open_for_write to prepare for callers that won't have the fmode_t.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/bsg-lib.c         | 2 +-
 block/bsg.c             | 8 +++++---
 drivers/scsi/scsi_bsg.c | 4 ++--
 include/linux/bsg.h     | 2 +-
 4 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/block/bsg-lib.c b/block/bsg-lib.c
index 435c32373cd68f..b3acdbdb6e7ea8 100644
--- a/block/bsg-lib.c
+++ b/block/bsg-lib.c
@@ -26,7 +26,7 @@ struct bsg_set {
 };
 
 static int bsg_transport_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr,
-		fmode_t mode, unsigned int timeout)
+		bool open_for_write, unsigned int timeout)
 {
 	struct bsg_job *job;
 	struct request *rq;
diff --git a/block/bsg.c b/block/bsg.c
index 7eca43f33d7ff8..bec4027842b31e 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -54,7 +54,8 @@ static unsigned int bsg_timeout(struct bsg_device *bd, struct sg_io_v4 *hdr)
 	return max_t(unsigned int, timeout, BLK_MIN_SG_TIMEOUT);
 }
 
-static int bsg_sg_io(struct bsg_device *bd, fmode_t mode, void __user *uarg)
+static int bsg_sg_io(struct bsg_device *bd, bool open_for_write,
+		     void __user *uarg)
 {
 	struct sg_io_v4 hdr;
 	int ret;
@@ -63,7 +64,8 @@ static int bsg_sg_io(struct bsg_device *bd, fmode_t mode, void __user *uarg)
 		return -EFAULT;
 	if (hdr.guard != 'Q')
 		return -EINVAL;
-	ret = bd->sg_io_fn(bd->queue, &hdr, mode, bsg_timeout(bd, &hdr));
+	ret = bd->sg_io_fn(bd->queue, &hdr, open_for_write,
+			   bsg_timeout(bd, &hdr));
 	if (!ret && copy_to_user(uarg, &hdr, sizeof(hdr)))
 		return -EFAULT;
 	return ret;
@@ -146,7 +148,7 @@ static long bsg_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	case SG_EMULATED_HOST:
 		return put_user(1, intp);
 	case SG_IO:
-		return bsg_sg_io(bd, file->f_mode, uarg);
+		return bsg_sg_io(bd, file->f_mode & FMODE_WRITE, uarg);
 	case SCSI_IOCTL_SEND_COMMAND:
 		pr_warn_ratelimited("%s: calling unsupported SCSI_IOCTL_SEND_COMMAND\n",
 				current->comm);
diff --git a/drivers/scsi/scsi_bsg.c b/drivers/scsi/scsi_bsg.c
index 12431f35f861e1..a9a9ec086a7e3f 100644
--- a/drivers/scsi/scsi_bsg.c
+++ b/drivers/scsi/scsi_bsg.c
@@ -10,7 +10,7 @@
 #define uptr64(val) ((void __user *)(uintptr_t)(val))
 
 static int scsi_bsg_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr,
-		fmode_t mode, unsigned int timeout)
+		bool open_for_write, unsigned int timeout)
 {
 	struct scsi_cmnd *scmd;
 	struct request *rq;
@@ -42,7 +42,7 @@ static int scsi_bsg_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr,
 	if (copy_from_user(scmd->cmnd, uptr64(hdr->request), scmd->cmd_len))
 		goto out_put_request;
 	ret = -EPERM;
-	if (!scsi_cmd_allowed(scmd->cmnd, mode & FMODE_WRITE))
+	if (!scsi_cmd_allowed(scmd->cmnd, open_for_write))
 		goto out_put_request;
 
 	ret = 0;
diff --git a/include/linux/bsg.h b/include/linux/bsg.h
index 1ac81c809da9b3..ee2df73edf83f8 100644
--- a/include/linux/bsg.h
+++ b/include/linux/bsg.h
@@ -9,7 +9,7 @@ struct device;
 struct request_queue;
 
 typedef int (bsg_sg_io_fn)(struct request_queue *, struct sg_io_v4 *hdr,
-		fmode_t mode, unsigned int timeout);
+		bool open_for_write, unsigned int timeout);
 
 struct bsg_device *bsg_register_queue(struct request_queue *q,
 		struct device *parent, const char *name,
-- 
2.39.2

Re: [PATCH 21/31] scsi: replace the fmode_t argument to ->sg_io_fn with a simple bool

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:40AM +0200, Christoph Hellwig wrote:
> Instead of passing a fmode_t and only checking it for FMODE_WRITE, pass
> a bool open_for_write to prepare for callers that won't have the fmode_t.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 21/31] scsi: replace the fmode_t argument to ->sg_io_fn with a simple bool

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> Instead of passing a fmode_t and only checking it for FMODE_WRITE, pass
> a bool open_for_write to prepare for callers that won't have the fmode_t.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   block/bsg-lib.c         | 2 +-
>   block/bsg.c             | 8 +++++---
>   drivers/scsi/scsi_bsg.c | 4 ++--
>   include/linux/bsg.h     | 2 +-
>   4 files changed, 9 insertions(+), 7 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

Re: [PATCH 21/31] scsi: replace the fmode_t argument to ->sg_io_fn with a simple bool

[Martin K. Petersen]

Christoph,

> Instead of passing a fmode_t and only checking it for FMODE_WRITE, pass
> a bool open_for_write to prepare for callers that won't have the fmode_t.

Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>

-- 
Martin K. Petersen	Oracle Linux Engineering

[PATCH 22/31] nvme: replace the fmode_t argument to the nvme ioctl handlers with a simple bool

[Christoph Hellwig]

Instead of passing a fmode_t and only checking it fo0r FMODE_WRITE, pass
a bool open_for_write to prepare for callers that won't have the fmode_t.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/nvme/host/ioctl.c | 62 +++++++++++++++++++++------------------
 1 file changed, 34 insertions(+), 28 deletions(-)

diff --git a/drivers/nvme/host/ioctl.c b/drivers/nvme/host/ioctl.c
index 81c5c9e3847747..8bf09047348ee9 100644
--- a/drivers/nvme/host/ioctl.c
+++ b/drivers/nvme/host/ioctl.c
@@ -14,7 +14,7 @@ enum {
 };
 
 static bool nvme_cmd_allowed(struct nvme_ns *ns, struct nvme_command *c,
-		unsigned int flags, fmode_t mode)
+		unsigned int flags, bool open_for_write)
 {
 	u32 effects;
 
@@ -80,7 +80,7 @@ static bool nvme_cmd_allowed(struct nvme_ns *ns, struct nvme_command *c,
 	 * writing.
 	 */
 	if (nvme_is_write(c) || (effects & NVME_CMD_EFFECTS_LBCC))
-		return mode & FMODE_WRITE;
+		return open_for_write;
 	return true;
 }
 
@@ -337,7 +337,7 @@ static bool nvme_validate_passthru_nsid(struct nvme_ctrl *ctrl,
 
 static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
 		struct nvme_passthru_cmd __user *ucmd, unsigned int flags,
-		fmode_t mode)
+		bool open_for_write)
 {
 	struct nvme_passthru_cmd cmd;
 	struct nvme_command c;
@@ -365,7 +365,7 @@ static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
 	c.common.cdw14 = cpu_to_le32(cmd.cdw14);
 	c.common.cdw15 = cpu_to_le32(cmd.cdw15);
 
-	if (!nvme_cmd_allowed(ns, &c, 0, mode))
+	if (!nvme_cmd_allowed(ns, &c, 0, open_for_write))
 		return -EACCES;
 
 	if (cmd.timeout_ms)
@@ -385,7 +385,7 @@ static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
 
 static int nvme_user_cmd64(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
 		struct nvme_passthru_cmd64 __user *ucmd, unsigned int flags,
-		fmode_t mode)
+		bool open_for_write)
 {
 	struct nvme_passthru_cmd64 cmd;
 	struct nvme_command c;
@@ -412,7 +412,7 @@ static int nvme_user_cmd64(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
 	c.common.cdw14 = cpu_to_le32(cmd.cdw14);
 	c.common.cdw15 = cpu_to_le32(cmd.cdw15);
 
-	if (!nvme_cmd_allowed(ns, &c, flags, mode))
+	if (!nvme_cmd_allowed(ns, &c, flags, open_for_write))
 		return -EACCES;
 
 	if (cmd.timeout_ms)
@@ -583,7 +583,7 @@ static int nvme_uring_cmd_io(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
 	c.common.cdw14 = cpu_to_le32(READ_ONCE(cmd->cdw14));
 	c.common.cdw15 = cpu_to_le32(READ_ONCE(cmd->cdw15));
 
-	if (!nvme_cmd_allowed(ns, &c, 0, ioucmd->file->f_mode))
+	if (!nvme_cmd_allowed(ns, &c, 0, ioucmd->file->f_mode & FMODE_WRITE))
 		return -EACCES;
 
 	d.metadata = READ_ONCE(cmd->metadata);
@@ -649,13 +649,13 @@ static bool is_ctrl_ioctl(unsigned int cmd)
 }
 
 static int nvme_ctrl_ioctl(struct nvme_ctrl *ctrl, unsigned int cmd,
-		void __user *argp, fmode_t mode)
+		void __user *argp, bool open_for_write)
 {
 	switch (cmd) {
 	case NVME_IOCTL_ADMIN_CMD:
-		return nvme_user_cmd(ctrl, NULL, argp, 0, mode);
+		return nvme_user_cmd(ctrl, NULL, argp, 0, open_for_write);
 	case NVME_IOCTL_ADMIN64_CMD:
-		return nvme_user_cmd64(ctrl, NULL, argp, 0, mode);
+		return nvme_user_cmd64(ctrl, NULL, argp, 0, open_for_write);
 	default:
 		return sed_ioctl(ctrl->opal_dev, cmd, argp);
 	}
@@ -680,14 +680,14 @@ struct nvme_user_io32 {
 #endif /* COMPAT_FOR_U64_ALIGNMENT */
 
 static int nvme_ns_ioctl(struct nvme_ns *ns, unsigned int cmd,
-		void __user *argp, unsigned int flags, fmode_t mode)
+		void __user *argp, unsigned int flags, bool open_for_write)
 {
 	switch (cmd) {
 	case NVME_IOCTL_ID:
 		force_successful_syscall_return();
 		return ns->head->ns_id;
 	case NVME_IOCTL_IO_CMD:
-		return nvme_user_cmd(ns->ctrl, ns, argp, flags, mode);
+		return nvme_user_cmd(ns->ctrl, ns, argp, flags, open_for_write);
 	/*
 	 * struct nvme_user_io can have different padding on some 32-bit ABIs.
 	 * Just accept the compat version as all fields that are used are the
@@ -702,7 +702,8 @@ static int nvme_ns_ioctl(struct nvme_ns *ns, unsigned int cmd,
 		flags |= NVME_IOCTL_VEC;
 		fallthrough;
 	case NVME_IOCTL_IO64_CMD:
-		return nvme_user_cmd64(ns->ctrl, ns, argp, flags, mode);
+		return nvme_user_cmd64(ns->ctrl, ns, argp, flags,
+				       open_for_write);
 	default:
 		return -ENOTTY;
 	}
@@ -712,6 +713,7 @@ int nvme_ioctl(struct block_device *bdev, fmode_t mode,
 		unsigned int cmd, unsigned long arg)
 {
 	struct nvme_ns *ns = bdev->bd_disk->private_data;
+	bool open_for_write = mode & FMODE_WRITE;
 	void __user *argp = (void __user *)arg;
 	unsigned int flags = 0;
 
@@ -719,19 +721,20 @@ int nvme_ioctl(struct block_device *bdev, fmode_t mode,
 		flags |= NVME_IOCTL_PARTITION;
 
 	if (is_ctrl_ioctl(cmd))
-		return nvme_ctrl_ioctl(ns->ctrl, cmd, argp, mode);
-	return nvme_ns_ioctl(ns, cmd, argp, flags, mode);
+		return nvme_ctrl_ioctl(ns->ctrl, cmd, argp, open_for_write);
+	return nvme_ns_ioctl(ns, cmd, argp, flags, open_for_write);
 }
 
 long nvme_ns_chr_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	struct nvme_ns *ns =
 		container_of(file_inode(file)->i_cdev, struct nvme_ns, cdev);
+	bool open_for_write = file->f_mode & FMODE_WRITE;
 	void __user *argp = (void __user *)arg;
 
 	if (is_ctrl_ioctl(cmd))
-		return nvme_ctrl_ioctl(ns->ctrl, cmd, argp, file->f_mode);
-	return nvme_ns_ioctl(ns, cmd, argp, 0, file->f_mode);
+		return nvme_ctrl_ioctl(ns->ctrl, cmd, argp, open_for_write);
+	return nvme_ns_ioctl(ns, cmd, argp, 0, open_for_write);
 }
 
 static int nvme_uring_cmd_checks(unsigned int issue_flags)
@@ -800,7 +803,7 @@ int nvme_ns_chr_uring_cmd_iopoll(struct io_uring_cmd *ioucmd,
 #ifdef CONFIG_NVME_MULTIPATH
 static int nvme_ns_head_ctrl_ioctl(struct nvme_ns *ns, unsigned int cmd,
 		void __user *argp, struct nvme_ns_head *head, int srcu_idx,
-		fmode_t mode)
+		bool open_for_write)
 	__releases(&head->srcu)
 {
 	struct nvme_ctrl *ctrl = ns->ctrl;
@@ -808,7 +811,7 @@ static int nvme_ns_head_ctrl_ioctl(struct nvme_ns *ns, unsigned int cmd,
 
 	nvme_get_ctrl(ns->ctrl);
 	srcu_read_unlock(&head->srcu, srcu_idx);
-	ret = nvme_ctrl_ioctl(ns->ctrl, cmd, argp, mode);
+	ret = nvme_ctrl_ioctl(ns->ctrl, cmd, argp, open_for_write);
 
 	nvme_put_ctrl(ctrl);
 	return ret;
@@ -818,6 +821,7 @@ int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode,
 		unsigned int cmd, unsigned long arg)
 {
 	struct nvme_ns_head *head = bdev->bd_disk->private_data;
+	bool open_for_write = mode & FMODE_WRITE;
 	void __user *argp = (void __user *)arg;
 	struct nvme_ns *ns;
 	int srcu_idx, ret = -EWOULDBLOCK;
@@ -838,9 +842,9 @@ int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode,
 	 */
 	if (is_ctrl_ioctl(cmd))
 		return nvme_ns_head_ctrl_ioctl(ns, cmd, argp, head, srcu_idx,
-					mode);
+					       open_for_write);
 
-	ret = nvme_ns_ioctl(ns, cmd, argp, flags, mode);
+	ret = nvme_ns_ioctl(ns, cmd, argp, flags, open_for_write);
 out_unlock:
 	srcu_read_unlock(&head->srcu, srcu_idx);
 	return ret;
@@ -849,6 +853,7 @@ int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode,
 long nvme_ns_head_chr_ioctl(struct file *file, unsigned int cmd,
 		unsigned long arg)
 {
+	bool open_for_write = file->f_mode & FMODE_WRITE;
 	struct cdev *cdev = file_inode(file)->i_cdev;
 	struct nvme_ns_head *head =
 		container_of(cdev, struct nvme_ns_head, cdev);
@@ -863,9 +868,9 @@ long nvme_ns_head_chr_ioctl(struct file *file, unsigned int cmd,
 
 	if (is_ctrl_ioctl(cmd))
 		return nvme_ns_head_ctrl_ioctl(ns, cmd, argp, head, srcu_idx,
-				file->f_mode);
+				open_for_write);
 
-	ret = nvme_ns_ioctl(ns, cmd, argp, 0, file->f_mode);
+	ret = nvme_ns_ioctl(ns, cmd, argp, 0, open_for_write);
 out_unlock:
 	srcu_read_unlock(&head->srcu, srcu_idx);
 	return ret;
@@ -940,7 +945,7 @@ int nvme_dev_uring_cmd(struct io_uring_cmd *ioucmd, unsigned int issue_flags)
 }
 
 static int nvme_dev_user_cmd(struct nvme_ctrl *ctrl, void __user *argp,
-		fmode_t mode)
+		bool open_for_write)
 {
 	struct nvme_ns *ns;
 	int ret;
@@ -964,7 +969,7 @@ static int nvme_dev_user_cmd(struct nvme_ctrl *ctrl, void __user *argp,
 	kref_get(&ns->kref);
 	up_read(&ctrl->namespaces_rwsem);
 
-	ret = nvme_user_cmd(ctrl, ns, argp, 0, mode);
+	ret = nvme_user_cmd(ctrl, ns, argp, 0, open_for_write);
 	nvme_put_ns(ns);
 	return ret;
 
@@ -976,16 +981,17 @@ static int nvme_dev_user_cmd(struct nvme_ctrl *ctrl, void __user *argp,
 long nvme_dev_ioctl(struct file *file, unsigned int cmd,
 		unsigned long arg)
 {
+	bool open_for_write = file->f_mode & FMODE_WRITE;
 	struct nvme_ctrl *ctrl = file->private_data;
 	void __user *argp = (void __user *)arg;
 
 	switch (cmd) {
 	case NVME_IOCTL_ADMIN_CMD:
-		return nvme_user_cmd(ctrl, NULL, argp, 0, file->f_mode);
+		return nvme_user_cmd(ctrl, NULL, argp, 0, open_for_write);
 	case NVME_IOCTL_ADMIN64_CMD:
-		return nvme_user_cmd64(ctrl, NULL, argp, 0, file->f_mode);
+		return nvme_user_cmd64(ctrl, NULL, argp, 0, open_for_write);
 	case NVME_IOCTL_IO_CMD:
-		return nvme_dev_user_cmd(ctrl, argp, file->f_mode);
+		return nvme_dev_user_cmd(ctrl, argp, open_for_write);
 	case NVME_IOCTL_RESET:
 		if (!capable(CAP_SYS_ADMIN))
 			return -EACCES;
-- 
2.39.2

Re: [PATCH 22/31] nvme: replace the fmode_t argument to the nvme ioctl handlers with a simple bool

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:41AM +0200, Christoph Hellwig wrote:
> Instead of passing a fmode_t and only checking it fo0r FMODE_WRITE, pass
> a bool open_for_write to prepare for callers that won't have the fmode_t.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 22/31] nvme: replace the fmode_t argument to the nvme ioctl handlers with a simple bool

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> Instead of passing a fmode_t and only checking it fo0r FMODE_WRITE, pass
> a bool open_for_write to prepare for callers that won't have the fmode_t.
> 
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
> ---
>   drivers/nvme/host/ioctl.c | 62 +++++++++++++++++++++------------------
>   1 file changed, 34 insertions(+), 28 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare-l3A5Bk7waGM@public.gmane.org>

Cheers,

Hannes

[PATCH 23/31] mtd: block: use a simple bool to track open for write

[Christoph Hellwig]

Instead of propagating the fmode_t, just use a bool to track if a mtd
block device was opened for writing.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/mtd/mtd_blkdevs.c    | 2 +-
 drivers/mtd/mtdblock.c       | 2 +-
 include/linux/mtd/blktrans.h | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index f0bb09fde95e3a..bd0b7545364349 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -208,7 +208,7 @@ static int blktrans_open(struct gendisk *disk, fmode_t mode)
 	ret = __get_mtd_device(dev->mtd);
 	if (ret)
 		goto error_release;
-	dev->file_mode = mode;
+	dev->writable = mode & FMODE_WRITE;
 
 unlock:
 	dev->open++;
diff --git a/drivers/mtd/mtdblock.c b/drivers/mtd/mtdblock.c
index a0a1194dc1d902..fa476fb4dffb6c 100644
--- a/drivers/mtd/mtdblock.c
+++ b/drivers/mtd/mtdblock.c
@@ -294,7 +294,7 @@ static void mtdblock_release(struct mtd_blktrans_dev *mbd)
 		 * It was the last usage. Free the cache, but only sync if
 		 * opened for writing.
 		 */
-		if (mbd->file_mode & FMODE_WRITE)
+		if (mbd->writable)
 			mtd_sync(mbd->mtd);
 		vfree(mtdblk->cache_data);
 	}
diff --git a/include/linux/mtd/blktrans.h b/include/linux/mtd/blktrans.h
index 15cc9b95e32b52..6e471436bba556 100644
--- a/include/linux/mtd/blktrans.h
+++ b/include/linux/mtd/blktrans.h
@@ -34,7 +34,7 @@ struct mtd_blktrans_dev {
 	struct blk_mq_tag_set *tag_set;
 	spinlock_t queue_lock;
 	void *priv;
-	fmode_t file_mode;
+	bool writable;
 };
 
 struct mtd_blktrans_ops {
-- 
2.39.2

Re: [PATCH 23/31] mtd: block: use a simple bool to track open for write

[Richard Weinberger]

----- Ursprüngliche Mail -----
> Von: "hch" <hch@lst.de>
> Instead of propagating the fmode_t, just use a bool to track if a mtd
> block device was opened for writing.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> drivers/mtd/mtd_blkdevs.c    | 2 +-
> drivers/mtd/mtdblock.c       | 2 +-
> include/linux/mtd/blktrans.h | 2 +-
> 3 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
> index f0bb09fde95e3a..bd0b7545364349 100644
> --- a/drivers/mtd/mtd_blkdevs.c
> +++ b/drivers/mtd/mtd_blkdevs.c
> @@ -208,7 +208,7 @@ static int blktrans_open(struct gendisk *disk, fmode_t mode)
> 	ret = __get_mtd_device(dev->mtd);
> 	if (ret)
> 		goto error_release;
> -	dev->file_mode = mode;
> +	dev->writable = mode & FMODE_WRITE;
> 
> unlock:
> 	dev->open++;
> diff --git a/drivers/mtd/mtdblock.c b/drivers/mtd/mtdblock.c
> index a0a1194dc1d902..fa476fb4dffb6c 100644
> --- a/drivers/mtd/mtdblock.c
> +++ b/drivers/mtd/mtdblock.c
> @@ -294,7 +294,7 @@ static void mtdblock_release(struct mtd_blktrans_dev *mbd)
> 		 * It was the last usage. Free the cache, but only sync if
> 		 * opened for writing.
> 		 */
> -		if (mbd->file_mode & FMODE_WRITE)
> +		if (mbd->writable)
> 			mtd_sync(mbd->mtd);
> 		vfree(mtdblk->cache_data);
> 	}
> diff --git a/include/linux/mtd/blktrans.h b/include/linux/mtd/blktrans.h
> index 15cc9b95e32b52..6e471436bba556 100644
> --- a/include/linux/mtd/blktrans.h
> +++ b/include/linux/mtd/blktrans.h
> @@ -34,7 +34,7 @@ struct mtd_blktrans_dev {
> 	struct blk_mq_tag_set *tag_set;
> 	spinlock_t queue_lock;
> 	void *priv;
> -	fmode_t file_mode;
> +	bool writable;
> };

Acked-by: Richard Weinberger <richard@nod.at>

Thanks,
//richard

_______________________________________________
linux-um mailing list
linux-um@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-um

Re: [PATCH 23/31] mtd: block: use a simple bool to track open for write

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:42AM +0200, Christoph Hellwig wrote:
> Instead of propagating the fmode_t, just use a bool to track if a mtd
> block device was opened for writing.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 23/31] mtd: block: use a simple bool to track open for write

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> Instead of propagating the fmode_t, just use a bool to track if a mtd
> block device was opened for writing.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   drivers/mtd/mtd_blkdevs.c    | 2 +-
>   drivers/mtd/mtdblock.c       | 2 +-
>   include/linux/mtd/blktrans.h | 2 +-
>   3 files changed, 3 insertions(+), 3 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

[PATCH 24/31] rnbd-srv: replace sess->open_flags with a "bool readonly"

[Christoph Hellwig]

Stop passing the fmode_t around and just use a simple bool to track if
an export is read-only.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/block/rnbd/rnbd-srv-sysfs.c |  3 +--
 drivers/block/rnbd/rnbd-srv.c       | 15 +++++++--------
 drivers/block/rnbd/rnbd-srv.h       |  2 +-
 3 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/drivers/block/rnbd/rnbd-srv-sysfs.c b/drivers/block/rnbd/rnbd-srv-sysfs.c
index d5d9267e1fa5e4..ebd95771c85ec7 100644
--- a/drivers/block/rnbd/rnbd-srv-sysfs.c
+++ b/drivers/block/rnbd/rnbd-srv-sysfs.c
@@ -88,8 +88,7 @@ static ssize_t read_only_show(struct kobject *kobj, struct kobj_attribute *attr,
 
 	sess_dev = container_of(kobj, struct rnbd_srv_sess_dev, kobj);
 
-	return sysfs_emit(page, "%d\n",
-			  !(sess_dev->open_flags & FMODE_WRITE));
+	return sysfs_emit(page, "%d\n", sess_dev->readonly);
 }
 
 static struct kobj_attribute rnbd_srv_dev_session_ro_attr =
diff --git a/drivers/block/rnbd/rnbd-srv.c b/drivers/block/rnbd/rnbd-srv.c
index 29d560472d05ba..b680071342b898 100644
--- a/drivers/block/rnbd/rnbd-srv.c
+++ b/drivers/block/rnbd/rnbd-srv.c
@@ -222,7 +222,7 @@ void rnbd_destroy_sess_dev(struct rnbd_srv_sess_dev *sess_dev, bool keep_id)
 	blkdev_put(sess_dev->bdev, NULL);
 	mutex_lock(&sess_dev->dev->lock);
 	list_del(&sess_dev->dev_list);
-	if (sess_dev->open_flags & FMODE_WRITE)
+	if (!sess_dev->readonly)
 		sess_dev->dev->open_write_cnt--;
 	mutex_unlock(&sess_dev->dev->lock);
 
@@ -561,7 +561,7 @@ static void rnbd_srv_fill_msg_open_rsp(struct rnbd_msg_open_rsp *rsp,
 static struct rnbd_srv_sess_dev *
 rnbd_srv_create_set_sess_dev(struct rnbd_srv_session *srv_sess,
 			      const struct rnbd_msg_open *open_msg,
-			      struct block_device *bdev, fmode_t open_flags,
+			      struct block_device *bdev, bool readonly,
 			      struct rnbd_srv_dev *srv_dev)
 {
 	struct rnbd_srv_sess_dev *sdev = rnbd_sess_dev_alloc(srv_sess);
@@ -576,7 +576,7 @@ rnbd_srv_create_set_sess_dev(struct rnbd_srv_session *srv_sess,
 	sdev->bdev		= bdev;
 	sdev->sess		= srv_sess;
 	sdev->dev		= srv_dev;
-	sdev->open_flags	= open_flags;
+	sdev->readonly		= readonly;
 	sdev->access_mode	= open_msg->access_mode;
 
 	return sdev;
@@ -681,13 +681,12 @@ static int process_msg_open(struct rnbd_srv_session *srv_sess,
 	struct rnbd_srv_sess_dev *srv_sess_dev;
 	const struct rnbd_msg_open *open_msg = msg;
 	struct block_device *bdev;
-	fmode_t open_flags;
+	fmode_t open_flags = FMODE_READ;
 	char *full_path;
 	struct rnbd_msg_open_rsp *rsp = data;
 
 	trace_process_msg_open(srv_sess, open_msg);
 
-	open_flags = FMODE_READ;
 	if (open_msg->access_mode != RNBD_ACCESS_RO)
 		open_flags |= FMODE_WRITE;
 
@@ -736,9 +735,9 @@ static int process_msg_open(struct rnbd_srv_session *srv_sess,
 		goto blkdev_put;
 	}
 
-	srv_sess_dev = rnbd_srv_create_set_sess_dev(srv_sess, open_msg,
-						     bdev, open_flags,
-						     srv_dev);
+	srv_sess_dev = rnbd_srv_create_set_sess_dev(srv_sess, open_msg, bdev,
+				open_msg->access_mode == RNBD_ACCESS_RO,
+				srv_dev);
 	if (IS_ERR(srv_sess_dev)) {
 		pr_err("Opening device '%s' on session %s failed, creating sess_dev failed, err: %ld\n",
 		       full_path, srv_sess->sessname, PTR_ERR(srv_sess_dev));
diff --git a/drivers/block/rnbd/rnbd-srv.h b/drivers/block/rnbd/rnbd-srv.h
index f5962fd31d62e4..76077a9db3dd55 100644
--- a/drivers/block/rnbd/rnbd-srv.h
+++ b/drivers/block/rnbd/rnbd-srv.h
@@ -52,7 +52,7 @@ struct rnbd_srv_sess_dev {
 	struct kobject                  kobj;
 	u32                             device_id;
 	bool				keep_id;
-	fmode_t                         open_flags;
+	bool				readonly;
 	struct kref			kref;
 	struct completion               *destroy_comp;
 	char				pathname[NAME_MAX];
-- 
2.39.2

Re: [PATCH 24/31] rnbd-srv: replace sess->open_flags with a "bool readonly"

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:43AM +0200, Christoph Hellwig wrote:
> Stop passing the fmode_t around and just use a simple bool to track if
> an export is read-only.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 24/31] rnbd-srv: replace sess->open_flags with a "bool readonly"

[Jinpu Wang]

On Tue, Jun 6, 2023 at 9:41 AM Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org> wrote:
>
> Stop passing the fmode_t around and just use a simple bool to track if
> an export is read-only.
>
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
Acked-by: Jack Wang <jinpu.wang-vEVw2sk9H7kAvxtiuMwx3w@public.gmane.org>
> ---
>  drivers/block/rnbd/rnbd-srv-sysfs.c |  3 +--
>  drivers/block/rnbd/rnbd-srv.c       | 15 +++++++--------
>  drivers/block/rnbd/rnbd-srv.h       |  2 +-
>  3 files changed, 9 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/block/rnbd/rnbd-srv-sysfs.c b/drivers/block/rnbd/rnbd-srv-sysfs.c
> index d5d9267e1fa5e4..ebd95771c85ec7 100644
> --- a/drivers/block/rnbd/rnbd-srv-sysfs.c
> +++ b/drivers/block/rnbd/rnbd-srv-sysfs.c
> @@ -88,8 +88,7 @@ static ssize_t read_only_show(struct kobject *kobj, struct kobj_attribute *attr,
>
>         sess_dev = container_of(kobj, struct rnbd_srv_sess_dev, kobj);
>
> -       return sysfs_emit(page, "%d\n",
> -                         !(sess_dev->open_flags & FMODE_WRITE));
> +       return sysfs_emit(page, "%d\n", sess_dev->readonly);
>  }
>
>  static struct kobj_attribute rnbd_srv_dev_session_ro_attr =
> diff --git a/drivers/block/rnbd/rnbd-srv.c b/drivers/block/rnbd/rnbd-srv.c
> index 29d560472d05ba..b680071342b898 100644
> --- a/drivers/block/rnbd/rnbd-srv.c
> +++ b/drivers/block/rnbd/rnbd-srv.c
> @@ -222,7 +222,7 @@ void rnbd_destroy_sess_dev(struct rnbd_srv_sess_dev *sess_dev, bool keep_id)
>         blkdev_put(sess_dev->bdev, NULL);
>         mutex_lock(&sess_dev->dev->lock);
>         list_del(&sess_dev->dev_list);
> -       if (sess_dev->open_flags & FMODE_WRITE)
> +       if (!sess_dev->readonly)
>                 sess_dev->dev->open_write_cnt--;
>         mutex_unlock(&sess_dev->dev->lock);
>
> @@ -561,7 +561,7 @@ static void rnbd_srv_fill_msg_open_rsp(struct rnbd_msg_open_rsp *rsp,
>  static struct rnbd_srv_sess_dev *
>  rnbd_srv_create_set_sess_dev(struct rnbd_srv_session *srv_sess,
>                               const struct rnbd_msg_open *open_msg,
> -                             struct block_device *bdev, fmode_t open_flags,
> +                             struct block_device *bdev, bool readonly,
>                               struct rnbd_srv_dev *srv_dev)
>  {
>         struct rnbd_srv_sess_dev *sdev = rnbd_sess_dev_alloc(srv_sess);
> @@ -576,7 +576,7 @@ rnbd_srv_create_set_sess_dev(struct rnbd_srv_session *srv_sess,
>         sdev->bdev              = bdev;
>         sdev->sess              = srv_sess;
>         sdev->dev               = srv_dev;
> -       sdev->open_flags        = open_flags;
> +       sdev->readonly          = readonly;
>         sdev->access_mode       = open_msg->access_mode;
>
>         return sdev;
> @@ -681,13 +681,12 @@ static int process_msg_open(struct rnbd_srv_session *srv_sess,
>         struct rnbd_srv_sess_dev *srv_sess_dev;
>         const struct rnbd_msg_open *open_msg = msg;
>         struct block_device *bdev;
> -       fmode_t open_flags;
> +       fmode_t open_flags = FMODE_READ;
>         char *full_path;
>         struct rnbd_msg_open_rsp *rsp = data;
>
>         trace_process_msg_open(srv_sess, open_msg);
>
> -       open_flags = FMODE_READ;
>         if (open_msg->access_mode != RNBD_ACCESS_RO)
>                 open_flags |= FMODE_WRITE;
>
> @@ -736,9 +735,9 @@ static int process_msg_open(struct rnbd_srv_session *srv_sess,
>                 goto blkdev_put;
>         }
>
> -       srv_sess_dev = rnbd_srv_create_set_sess_dev(srv_sess, open_msg,
> -                                                    bdev, open_flags,
> -                                                    srv_dev);
> +       srv_sess_dev = rnbd_srv_create_set_sess_dev(srv_sess, open_msg, bdev,
> +                               open_msg->access_mode == RNBD_ACCESS_RO,
> +                               srv_dev);
>         if (IS_ERR(srv_sess_dev)) {
>                 pr_err("Opening device '%s' on session %s failed, creating sess_dev failed, err: %ld\n",
>                        full_path, srv_sess->sessname, PTR_ERR(srv_sess_dev));
> diff --git a/drivers/block/rnbd/rnbd-srv.h b/drivers/block/rnbd/rnbd-srv.h
> index f5962fd31d62e4..76077a9db3dd55 100644
> --- a/drivers/block/rnbd/rnbd-srv.h
> +++ b/drivers/block/rnbd/rnbd-srv.h
> @@ -52,7 +52,7 @@ struct rnbd_srv_sess_dev {
>         struct kobject                  kobj;
>         u32                             device_id;
>         bool                            keep_id;
> -       fmode_t                         open_flags;
> +       bool                            readonly;
>         struct kref                     kref;
>         struct completion               *destroy_comp;
>         char                            pathname[NAME_MAX];
> --
> 2.39.2
>

Re: [PATCH 24/31] rnbd-srv: replace sess->open_flags with a "bool readonly"

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> Stop passing the fmode_t around and just use a simple bool to track if
> an export is read-only.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   drivers/block/rnbd/rnbd-srv-sysfs.c |  3 +--
>   drivers/block/rnbd/rnbd-srv.c       | 15 +++++++--------
>   drivers/block/rnbd/rnbd-srv.h       |  2 +-
>   3 files changed, 9 insertions(+), 11 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

[PATCH 25/31] ubd: remove commented out code in ubd_open

[Christoph Hellwig]

This code has been dead forever, make sure it doesn't show up in code
searches.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 arch/um/drivers/ubd_kern.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 8b79554968addb..20c1a16199c503 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -1170,13 +1170,6 @@ static int ubd_open(struct gendisk *disk, fmode_t mode)
 	}
 	ubd_dev->count++;
 	set_disk_ro(disk, !ubd_dev->openflags.w);
-
-	/* This should no more be needed. And it didn't work anyway to exclude
-	 * read-write remounting of filesystems.*/
-	/*if((mode & FMODE_WRITE) && !ubd_dev->openflags.w){
-	        if(--ubd_dev->count == 0) ubd_close_dev(ubd_dev);
-	        err = -EROFS;
-	}*/
 out:
 	mutex_unlock(&ubd_mutex);
 	return err;
-- 
2.39.2

Re: [PATCH 25/31] ubd: remove commented out code in ubd_open

[Richard Weinberger]

----- Ursprüngliche Mail -----
> Von: "hch" <hch@lst.de>
> This code has been dead forever, make sure it doesn't show up in code
> searches.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> arch/um/drivers/ubd_kern.c | 7 -------
> 1 file changed, 7 deletions(-)
> 
> diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
> index 8b79554968addb..20c1a16199c503 100644
> --- a/arch/um/drivers/ubd_kern.c
> +++ b/arch/um/drivers/ubd_kern.c
> @@ -1170,13 +1170,6 @@ static int ubd_open(struct gendisk *disk, fmode_t mode)
> 	}
> 	ubd_dev->count++;
> 	set_disk_ro(disk, !ubd_dev->openflags.w);
> -
> -	/* This should no more be needed. And it didn't work anyway to exclude
> -	 * read-write remounting of filesystems.*/
> -	/*if((mode & FMODE_WRITE) && !ubd_dev->openflags.w){
> -	        if(--ubd_dev->count == 0) ubd_close_dev(ubd_dev);
> -	        err = -EROFS;
> -	}*/

Acked-by: Richard Weinberger <richard@nod.at>

Thanks,
//richard

Re: [PATCH 25/31] ubd: remove commented out code in ubd_open

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:44AM +0200, Christoph Hellwig wrote:
> This code has been dead forever, make sure it doesn't show up in code
> searches.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 25/31] ubd: remove commented out code in ubd_open

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> This code has been dead forever, make sure it doesn't show up in code
> searches.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   arch/um/drivers/ubd_kern.c | 7 -------
>   1 file changed, 7 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

[PATCH 26/31] block: move a few internal definitions out of blkdev.h

[Christoph Hellwig]

All these helpers are only used in core block code, so move them out of
the public header.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/blk.h            | 23 +++++++++++++++++++++--
 include/linux/blkdev.h | 27 ---------------------------
 2 files changed, 21 insertions(+), 29 deletions(-)

diff --git a/block/blk.h b/block/blk.h
index 9582fcd0df4123..6910220aa030f1 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -394,10 +394,27 @@ static inline struct bio *blk_queue_bounce(struct bio *bio,
 #ifdef CONFIG_BLK_DEV_ZONED
 void disk_free_zone_bitmaps(struct gendisk *disk);
 void disk_clear_zone_settings(struct gendisk *disk);
-#else
+int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode,
+		unsigned int cmd, unsigned long arg);
+int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
+		unsigned int cmd, unsigned long arg);
+#else /* CONFIG_BLK_DEV_ZONED */
 static inline void disk_free_zone_bitmaps(struct gendisk *disk) {}
 static inline void disk_clear_zone_settings(struct gendisk *disk) {}
-#endif
+static inline int blkdev_report_zones_ioctl(struct block_device *bdev,
+		fmode_t mode, unsigned int cmd, unsigned long arg)
+{
+	return -ENOTTY;
+}
+static inline int blkdev_zone_mgmt_ioctl(struct block_device *bdev,
+		fmode_t mode, unsigned int cmd, unsigned long arg)
+{
+	return -ENOTTY;
+}
+#endif /* CONFIG_BLK_DEV_ZONED */
+
+struct block_device *bdev_alloc(struct gendisk *disk, u8 partno);
+void bdev_add(struct block_device *bdev, dev_t dev);
 
 int blk_alloc_ext_minor(void);
 void blk_free_ext_minor(unsigned int minor);
@@ -449,6 +466,8 @@ extern struct device_attribute dev_attr_events_poll_msecs;
 
 extern struct attribute_group blk_trace_attr_group;
 
+int truncate_bdev_range(struct block_device *bdev, fmode_t mode, loff_t lstart,
+		loff_t lend);
 long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg);
 long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg);
 
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 97803603902076..6b65623e447c02 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -318,7 +318,6 @@ typedef int (*report_zones_cb)(struct blk_zone *zone, unsigned int idx,
 void disk_set_zoned(struct gendisk *disk, enum blk_zoned_model model);
 
 #ifdef CONFIG_BLK_DEV_ZONED
-
 #define BLK_ALL_ZONES  ((unsigned int)-1)
 int blkdev_report_zones(struct block_device *bdev, sector_t sector,
 			unsigned int nr_zones, report_zones_cb cb, void *data);
@@ -328,33 +327,11 @@ extern int blkdev_zone_mgmt(struct block_device *bdev, enum req_op op,
 			    gfp_t gfp_mask);
 int blk_revalidate_disk_zones(struct gendisk *disk,
 			      void (*update_driver_data)(struct gendisk *disk));
-
-extern int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode,
-				     unsigned int cmd, unsigned long arg);
-extern int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
-				  unsigned int cmd, unsigned long arg);
-
 #else /* CONFIG_BLK_DEV_ZONED */
-
 static inline unsigned int bdev_nr_zones(struct block_device *bdev)
 {
 	return 0;
 }
-
-static inline int blkdev_report_zones_ioctl(struct block_device *bdev,
-					    fmode_t mode, unsigned int cmd,
-					    unsigned long arg)
-{
-	return -ENOTTY;
-}
-
-static inline int blkdev_zone_mgmt_ioctl(struct block_device *bdev,
-					 fmode_t mode, unsigned int cmd,
-					 unsigned long arg)
-{
-	return -ENOTTY;
-}
-
 #endif /* CONFIG_BLK_DEV_ZONED */
 
 /*
@@ -1493,11 +1470,7 @@ void blkdev_put(struct block_device *bdev, void *holder);
 struct block_device *blkdev_get_no_open(dev_t dev);
 void blkdev_put_no_open(struct block_device *bdev);
 
-struct block_device *bdev_alloc(struct gendisk *disk, u8 partno);
-void bdev_add(struct block_device *bdev, dev_t dev);
 struct block_device *I_BDEV(struct inode *inode);
-int truncate_bdev_range(struct block_device *bdev, fmode_t mode, loff_t lstart,
-		loff_t lend);
 
 #ifdef CONFIG_BLOCK
 void invalidate_bdev(struct block_device *bdev);
-- 
2.39.2

Re: [PATCH 26/31] block: move a few internal definitions out of blkdev.h

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:45AM +0200, Christoph Hellwig wrote:
> All these helpers are only used in core block code, so move them out of
> the public header.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 26/31] block: move a few internal definitions out of blkdev.h

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> All these helpers are only used in core block code, so move them out of
> the public header.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   block/blk.h            | 23 +++++++++++++++++++++--
>   include/linux/blkdev.h | 27 ---------------------------
>   2 files changed, 21 insertions(+), 29 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

[PATCH 27/31] block: remove unused fmode_t arguments from ioctl handlers

[Christoph Hellwig]

A few ioctl handlers have fmode_t arguments that are entirely unused,
remove them.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/blk-zoned.c |  4 ++--
 block/blk.h       |  6 +++---
 block/ioctl.c     | 14 +++++++-------
 3 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/block/blk-zoned.c b/block/blk-zoned.c
index 096b6b47561f83..02cc2c629ac9be 100644
--- a/block/blk-zoned.c
+++ b/block/blk-zoned.c
@@ -323,8 +323,8 @@ static int blkdev_copy_zone_to_user(struct blk_zone *zone, unsigned int idx,
  * BLKREPORTZONE ioctl processing.
  * Called from blkdev_ioctl.
  */
-int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode,
-			      unsigned int cmd, unsigned long arg)
+int blkdev_report_zones_ioctl(struct block_device *bdev, unsigned int cmd,
+		unsigned long arg)
 {
 	void __user *argp = (void __user *)arg;
 	struct zone_report_args args;
diff --git a/block/blk.h b/block/blk.h
index 6910220aa030f1..e28d5d67d31a28 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -394,15 +394,15 @@ static inline struct bio *blk_queue_bounce(struct bio *bio,
 #ifdef CONFIG_BLK_DEV_ZONED
 void disk_free_zone_bitmaps(struct gendisk *disk);
 void disk_clear_zone_settings(struct gendisk *disk);
-int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode,
-		unsigned int cmd, unsigned long arg);
+int blkdev_report_zones_ioctl(struct block_device *bdev, unsigned int cmd,
+		unsigned long arg);
 int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
 		unsigned int cmd, unsigned long arg);
 #else /* CONFIG_BLK_DEV_ZONED */
 static inline void disk_free_zone_bitmaps(struct gendisk *disk) {}
 static inline void disk_clear_zone_settings(struct gendisk *disk) {}
 static inline int blkdev_report_zones_ioctl(struct block_device *bdev,
-		fmode_t mode, unsigned int cmd, unsigned long arg)
+		unsigned int cmd, unsigned long arg)
 {
 	return -ENOTTY;
 }
diff --git a/block/ioctl.c b/block/ioctl.c
index b39bd5b41ee492..3a10c34b8ef6d3 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -344,8 +344,8 @@ static int blkdev_pr_clear(struct block_device *bdev,
 	return ops->pr_clear(bdev, c.key);
 }
 
-static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode,
-		unsigned cmd, unsigned long arg)
+static int blkdev_flushbuf(struct block_device *bdev, unsigned cmd,
+		unsigned long arg)
 {
 	if (!capable(CAP_SYS_ADMIN))
 		return -EACCES;
@@ -354,8 +354,8 @@ static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode,
 	return 0;
 }
 
-static int blkdev_roset(struct block_device *bdev, fmode_t mode,
-		unsigned cmd, unsigned long arg)
+static int blkdev_roset(struct block_device *bdev, unsigned cmd,
+		unsigned long arg)
 {
 	int ret, n;
 
@@ -475,9 +475,9 @@ static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,
 
 	switch (cmd) {
 	case BLKFLSBUF:
-		return blkdev_flushbuf(bdev, mode, cmd, arg);
+		return blkdev_flushbuf(bdev, cmd, arg);
 	case BLKROSET:
-		return blkdev_roset(bdev, mode, cmd, arg);
+		return blkdev_roset(bdev, cmd, arg);
 	case BLKDISCARD:
 		return blk_ioctl_discard(bdev, mode, arg);
 	case BLKSECDISCARD:
@@ -487,7 +487,7 @@ static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,
 	case BLKGETDISKSEQ:
 		return put_u64(argp, bdev->bd_disk->diskseq);
 	case BLKREPORTZONE:
-		return blkdev_report_zones_ioctl(bdev, mode, cmd, arg);
+		return blkdev_report_zones_ioctl(bdev, cmd, arg);
 	case BLKRESETZONE:
 	case BLKOPENZONE:
 	case BLKCLOSEZONE:
-- 
2.39.2

Re: [PATCH 27/31] block: remove unused fmode_t arguments from ioctl handlers

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:46AM +0200, Christoph Hellwig wrote:
> A few ioctl handlers have fmode_t arguments that are entirely unused,
> remove them.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 27/31] block: remove unused fmode_t arguments from ioctl handlers

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> A few ioctl handlers have fmode_t arguments that are entirely unused,
> remove them.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>   block/blk-zoned.c |  4 ++--
>   block/blk.h       |  6 +++---
>   block/ioctl.c     | 14 +++++++-------
>   3 files changed, 12 insertions(+), 12 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes

[PATCH 28/31] block: replace fmode_t with a block-specific type for block open flags

[Christoph Hellwig]

The only overlap between the block open flags mapped into the fmode_t and
other uses of fmode_t are FMODE_READ and FMODE_WRITE.  Define a new
blk_mode_t instead for use in blkdev_get_by_*, ->open and ->ioctl and
stop abusing fmode_t.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 arch/um/drivers/ubd_kern.c          |  8 +++---
 arch/xtensa/platforms/iss/simdisk.c |  2 +-
 block/bdev.c                        | 32 +++++++++++-----------
 block/blk-zoned.c                   |  8 +++---
 block/blk.h                         | 11 ++++----
 block/fops.c                        | 26 +++++++++++++-----
 block/genhd.c                       |  8 +++---
 block/ioctl.c                       | 42 +++++++++--------------------
 drivers/block/amiflop.c             | 12 ++++-----
 drivers/block/aoe/aoeblk.c          |  4 +--
 drivers/block/ataflop.c             | 25 +++++++++--------
 drivers/block/drbd/drbd_main.c      |  7 ++---
 drivers/block/drbd/drbd_nl.c        |  2 +-
 drivers/block/floppy.c              | 28 +++++++++----------
 drivers/block/loop.c                | 22 +++++++--------
 drivers/block/mtip32xx/mtip32xx.c   |  4 +--
 drivers/block/nbd.c                 |  4 +--
 drivers/block/pktcdvd.c             | 17 ++++++------
 drivers/block/rbd.c                 |  2 +-
 drivers/block/rnbd/rnbd-clt.c       |  4 +--
 drivers/block/rnbd/rnbd-srv.c       |  4 +--
 drivers/block/sunvdc.c              |  2 +-
 drivers/block/swim.c                | 16 +++++------
 drivers/block/swim3.c               | 24 ++++++++---------
 drivers/block/ublk_drv.c            |  2 +-
 drivers/block/xen-blkback/xenbus.c  |  2 +-
 drivers/block/xen-blkfront.c        |  2 +-
 drivers/block/z2ram.c               |  2 +-
 drivers/block/zram/zram_drv.c       |  6 ++---
 drivers/cdrom/cdrom.c               |  4 +--
 drivers/cdrom/gdrom.c               |  4 +--
 drivers/md/bcache/bcache.h          |  2 +-
 drivers/md/bcache/request.c         |  4 +--
 drivers/md/bcache/super.c           |  6 ++---
 drivers/md/dm-cache-target.c        | 12 ++++-----
 drivers/md/dm-clone-target.c        | 10 +++----
 drivers/md/dm-core.h                |  7 +++--
 drivers/md/dm-era-target.c          |  6 +++--
 drivers/md/dm-ioctl.c               | 10 +++----
 drivers/md/dm-snap.c                |  4 +--
 drivers/md/dm-table.c               | 11 ++++----
 drivers/md/dm-thin.c                |  9 ++++---
 drivers/md/dm-verity-fec.c          |  2 +-
 drivers/md/dm-verity-target.c       |  6 ++---
 drivers/md/dm.c                     | 10 +++----
 drivers/md/dm.h                     |  2 +-
 drivers/md/md.c                     |  8 +++---
 drivers/mmc/core/block.c            |  8 +++---
 drivers/mtd/devices/block2mtd.c     |  4 +--
 drivers/mtd/mtd_blkdevs.c           |  4 +--
 drivers/mtd/ubi/block.c             |  5 ++--
 drivers/nvme/host/core.c            |  2 +-
 drivers/nvme/host/ioctl.c           |  8 +++---
 drivers/nvme/host/multipath.c       |  2 +-
 drivers/nvme/host/nvme.h            |  4 +--
 drivers/nvme/target/io-cmd-bdev.c   |  2 +-
 drivers/s390/block/dasd.c           |  6 ++---
 drivers/s390/block/dasd_genhd.c     |  3 ++-
 drivers/s390/block/dasd_int.h       |  3 ++-
 drivers/s390/block/dasd_ioctl.c     |  2 +-
 drivers/s390/block/dcssblk.c        |  4 +--
 drivers/scsi/sd.c                   | 19 ++++++-------
 drivers/scsi/sr.c                   | 10 +++----
 drivers/target/target_core_iblock.c |  5 ++--
 drivers/target/target_core_pscsi.c  |  4 +--
 fs/btrfs/dev-replace.c              |  2 +-
 fs/btrfs/super.c                    |  4 +--
 fs/btrfs/volumes.c                  | 16 +++++------
 fs/btrfs/volumes.h                  |  4 +--
 fs/erofs/super.c                    |  2 +-
 fs/ext4/super.c                     |  2 +-
 fs/jfs/jfs_logmgr.c                 |  2 +-
 fs/nfs/blocklayout/dev.c            |  5 ++--
 fs/ocfs2/cluster/heartbeat.c        |  3 ++-
 fs/reiserfs/journal.c               |  4 +--
 fs/xfs/xfs_super.c                  |  2 +-
 include/linux/blkdev.h              | 30 ++++++++++++++++-----
 include/linux/cdrom.h               |  3 ++-
 include/linux/device-mapper.h       |  8 +++---
 kernel/power/swap.c                 |  6 ++---
 mm/swapfile.c                       |  2 +-
 81 files changed, 324 insertions(+), 311 deletions(-)

diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 20c1a16199c503..50206feac577d5 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -108,9 +108,9 @@ static inline void ubd_set_bit(__u64 bit, unsigned char *data)
 static DEFINE_MUTEX(ubd_lock);
 static DEFINE_MUTEX(ubd_mutex); /* replaces BKL, might not be needed */
 
-static int ubd_open(struct gendisk *disk, fmode_t mode);
+static int ubd_open(struct gendisk *disk, blk_mode_t mode);
 static void ubd_release(struct gendisk *disk);
-static int ubd_ioctl(struct block_device *bdev, fmode_t mode,
+static int ubd_ioctl(struct block_device *bdev, blk_mode_t mode,
 		     unsigned int cmd, unsigned long arg);
 static int ubd_getgeo(struct block_device *bdev, struct hd_geometry *geo);
 
@@ -1154,7 +1154,7 @@ static int __init ubd_driver_init(void){
 
 device_initcall(ubd_driver_init);
 
-static int ubd_open(struct gendisk *disk, fmode_t mode)
+static int ubd_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct ubd *ubd_dev = disk->private_data;
 	int err = 0;
@@ -1389,7 +1389,7 @@ static int ubd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 	return 0;
 }
 
-static int ubd_ioctl(struct block_device *bdev, fmode_t mode,
+static int ubd_ioctl(struct block_device *bdev, blk_mode_t mode,
 		     unsigned int cmd, unsigned long arg)
 {
 	struct ubd *ubd_dev = bdev->bd_disk->private_data;
diff --git a/arch/xtensa/platforms/iss/simdisk.c b/arch/xtensa/platforms/iss/simdisk.c
index 2ad9da3de0d90f..178cf96ca10acb 100644
--- a/arch/xtensa/platforms/iss/simdisk.c
+++ b/arch/xtensa/platforms/iss/simdisk.c
@@ -120,7 +120,7 @@ static void simdisk_submit_bio(struct bio *bio)
 	bio_endio(bio);
 }
 
-static int simdisk_open(struct gendisk *disk, fmode_t mode)
+static int simdisk_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct simdisk *dev = disk->private_data;
 
diff --git a/block/bdev.c b/block/bdev.c
index db63e5bcc46ffa..bd558a9ba3cd97 100644
--- a/block/bdev.c
+++ b/block/bdev.c
@@ -93,7 +93,7 @@ EXPORT_SYMBOL(invalidate_bdev);
  * Drop all buffers & page cache for given bdev range. This function bails
  * with error if bdev has other exclusive owner (such as filesystem).
  */
-int truncate_bdev_range(struct block_device *bdev, fmode_t mode,
+int truncate_bdev_range(struct block_device *bdev, blk_mode_t mode,
 			loff_t lstart, loff_t lend)
 {
 	/*
@@ -101,14 +101,14 @@ int truncate_bdev_range(struct block_device *bdev, fmode_t mode,
 	 * while we discard the buffer cache to avoid discarding buffers
 	 * under live filesystem.
 	 */
-	if (!(mode & FMODE_EXCL)) {
+	if (!(mode & BLK_OPEN_EXCL)) {
 		int err = bd_prepare_to_claim(bdev, truncate_bdev_range, NULL);
 		if (err)
 			goto invalidate;
 	}
 
 	truncate_inode_pages_range(bdev->bd_inode->i_mapping, lstart, lend);
-	if (!(mode & FMODE_EXCL))
+	if (!(mode & BLK_OPEN_EXCL))
 		bd_abort_claiming(bdev, truncate_bdev_range);
 	return 0;
 
@@ -647,7 +647,7 @@ static void blkdev_flush_mapping(struct block_device *bdev)
 	bdev_write_inode(bdev);
 }
 
-static int blkdev_get_whole(struct block_device *bdev, fmode_t mode)
+static int blkdev_get_whole(struct block_device *bdev, blk_mode_t mode)
 {
 	struct gendisk *disk = bdev->bd_disk;
 	int ret;
@@ -679,7 +679,7 @@ static void blkdev_put_whole(struct block_device *bdev)
 		bdev->bd_disk->fops->release(bdev->bd_disk);
 }
 
-static int blkdev_get_part(struct block_device *part, fmode_t mode)
+static int blkdev_get_part(struct block_device *part, blk_mode_t mode)
 {
 	struct gendisk *disk = part->bd_disk;
 	int ret;
@@ -743,11 +743,11 @@ void blkdev_put_no_open(struct block_device *bdev)
 {
 	put_device(&bdev->bd_device);
 }
-
+	
 /**
  * blkdev_get_by_dev - open a block device by device number
  * @dev: device number of block device to open
- * @mode: FMODE_* mask
+ * @mode: open mode (BLK_OPEN_*)
  * @holder: exclusive holder identifier
  * @hops: holder operations
  *
@@ -765,7 +765,7 @@ void blkdev_put_no_open(struct block_device *bdev)
  * RETURNS:
  * Reference to the block_device on success, ERR_PTR(-errno) on failure.
  */
-struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
+struct block_device *blkdev_get_by_dev(dev_t dev, blk_mode_t mode, void *holder,
 		const struct blk_holder_ops *hops)
 {
 	bool unblock_events = true;
@@ -775,8 +775,8 @@ struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
 
 	ret = devcgroup_check_permission(DEVCG_DEV_BLOCK,
 			MAJOR(dev), MINOR(dev),
-			((mode & FMODE_READ) ? DEVCG_ACC_READ : 0) |
-			((mode & FMODE_WRITE) ? DEVCG_ACC_WRITE : 0));
+			((mode & BLK_OPEN_READ) ? DEVCG_ACC_READ : 0) |
+			((mode & BLK_OPEN_WRITE) ? DEVCG_ACC_WRITE : 0));
 	if (ret)
 		return ERR_PTR(ret);
 
@@ -786,12 +786,12 @@ struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
 	disk = bdev->bd_disk;
 
 	if (holder) {
-		mode |= FMODE_EXCL;
+		mode |= BLK_OPEN_EXCL;
 		ret = bd_prepare_to_claim(bdev, holder, hops);
 		if (ret)
 			goto put_blkdev;
 	} else {
-		if (WARN_ON_ONCE(mode & FMODE_EXCL)) {
+		if (WARN_ON_ONCE(mode & BLK_OPEN_EXCL)) {
 			ret = -EIO;
 			goto put_blkdev;
 		}
@@ -821,7 +821,7 @@ struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
 		 * writeable reference is too fragile given the way @mode is
 		 * used in blkdev_get/put().
 		 */
-		if ((mode & FMODE_WRITE) && !bdev->bd_write_holder &&
+		if ((mode & BLK_OPEN_WRITE) && !bdev->bd_write_holder &&
 		    (disk->event_flags & DISK_EVENT_FLAG_BLOCK_ON_EXCL_WRITE)) {
 			bdev->bd_write_holder = true;
 			unblock_events = false;
@@ -848,7 +848,7 @@ EXPORT_SYMBOL(blkdev_get_by_dev);
 /**
  * blkdev_get_by_path - open a block device by name
  * @path: path to the block device to open
- * @mode: FMODE_* mask
+ * @mode: open mode (BLK_OPEN_*)
  * @holder: exclusive holder identifier
  *
  * Open the block device described by the device file at @path.  If @holder is
@@ -861,7 +861,7 @@ EXPORT_SYMBOL(blkdev_get_by_dev);
  * RETURNS:
  * Reference to the block_device on success, ERR_PTR(-errno) on failure.
  */
-struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
+struct block_device *blkdev_get_by_path(const char *path, blk_mode_t mode,
 		void *holder, const struct blk_holder_ops *hops)
 {
 	struct block_device *bdev;
@@ -873,7 +873,7 @@ struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
 		return ERR_PTR(error);
 
 	bdev = blkdev_get_by_dev(dev, mode, holder, hops);
-	if (!IS_ERR(bdev) && (mode & FMODE_WRITE) && bdev_read_only(bdev)) {
+	if (!IS_ERR(bdev) && (mode & BLK_OPEN_WRITE) && bdev_read_only(bdev)) {
 		blkdev_put(bdev, holder);
 		return ERR_PTR(-EACCES);
 	}
diff --git a/block/blk-zoned.c b/block/blk-zoned.c
index 02cc2c629ac9be..0f9f97cdddd99c 100644
--- a/block/blk-zoned.c
+++ b/block/blk-zoned.c
@@ -356,8 +356,8 @@ int blkdev_report_zones_ioctl(struct block_device *bdev, unsigned int cmd,
 	return 0;
 }
 
-static int blkdev_truncate_zone_range(struct block_device *bdev, fmode_t mode,
-				      const struct blk_zone_range *zrange)
+static int blkdev_truncate_zone_range(struct block_device *bdev,
+		blk_mode_t mode, const struct blk_zone_range *zrange)
 {
 	loff_t start, end;
 
@@ -376,7 +376,7 @@ static int blkdev_truncate_zone_range(struct block_device *bdev, fmode_t mode,
  * BLKRESETZONE, BLKOPENZONE, BLKCLOSEZONE and BLKFINISHZONE ioctl processing.
  * Called from blkdev_ioctl.
  */
-int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
+int blkdev_zone_mgmt_ioctl(struct block_device *bdev, blk_mode_t mode,
 			   unsigned int cmd, unsigned long arg)
 {
 	void __user *argp = (void __user *)arg;
@@ -390,7 +390,7 @@ int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
 	if (!bdev_is_zoned(bdev))
 		return -ENOTTY;
 
-	if (!(mode & FMODE_WRITE))
+	if (!(mode & BLK_OPEN_WRITE))
 		return -EBADF;
 
 	if (copy_from_user(&zrange, argp, sizeof(struct blk_zone_range)))
diff --git a/block/blk.h b/block/blk.h
index e28d5d67d31a28..768852a84fefb3 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -396,7 +396,7 @@ void disk_free_zone_bitmaps(struct gendisk *disk);
 void disk_clear_zone_settings(struct gendisk *disk);
 int blkdev_report_zones_ioctl(struct block_device *bdev, unsigned int cmd,
 		unsigned long arg);
-int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
+int blkdev_zone_mgmt_ioctl(struct block_device *bdev, blk_mode_t mode,
 		unsigned int cmd, unsigned long arg);
 #else /* CONFIG_BLK_DEV_ZONED */
 static inline void disk_free_zone_bitmaps(struct gendisk *disk) {}
@@ -407,7 +407,7 @@ static inline int blkdev_report_zones_ioctl(struct block_device *bdev,
 	return -ENOTTY;
 }
 static inline int blkdev_zone_mgmt_ioctl(struct block_device *bdev,
-		fmode_t mode, unsigned int cmd, unsigned long arg)
+		blk_mode_t mode, unsigned int cmd, unsigned long arg)
 {
 	return -ENOTTY;
 }
@@ -451,7 +451,7 @@ static inline void bio_release_page(struct bio *bio, struct page *page)
 
 struct request_queue *blk_alloc_queue(int node_id);
 
-int disk_scan_partitions(struct gendisk *disk, fmode_t mode);
+int disk_scan_partitions(struct gendisk *disk, blk_mode_t mode);
 
 int disk_alloc_events(struct gendisk *disk);
 void disk_add_events(struct gendisk *disk);
@@ -466,8 +466,9 @@ extern struct device_attribute dev_attr_events_poll_msecs;
 
 extern struct attribute_group blk_trace_attr_group;
 
-int truncate_bdev_range(struct block_device *bdev, fmode_t mode, loff_t lstart,
-		loff_t lend);
+blk_mode_t file_to_blk_mode(struct file *file);
+int truncate_bdev_range(struct block_device *bdev, blk_mode_t mode,
+		loff_t lstart, loff_t lend);
 long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg);
 long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg);
 
diff --git a/block/fops.c b/block/fops.c
index 9f26e25bafa172..928c37a214f785 100644
--- a/block/fops.c
+++ b/block/fops.c
@@ -470,6 +470,24 @@ static int blkdev_fsync(struct file *filp, loff_t start, loff_t end,
 	return error;
 }
 
+blk_mode_t file_to_blk_mode(struct file *file)
+{
+	blk_mode_t mode = 0;
+
+	if (file->f_mode & FMODE_READ)
+		mode |= BLK_OPEN_READ;
+	if (file->f_mode & FMODE_WRITE)
+		mode |= BLK_OPEN_WRITE;
+	if (file->f_mode & FMODE_EXCL)
+		mode |= BLK_OPEN_EXCL;
+	if ((file->f_flags & O_ACCMODE) == 3)
+		mode |= BLK_OPEN_WRITE_IOCTL;
+	if (file->f_flags & O_NDELAY)
+		mode |= BLK_OPEN_NDELAY;
+
+	return mode;
+}
+
 static int blkdev_open(struct inode *inode, struct file *filp)
 {
 	struct block_device *bdev;
@@ -483,14 +501,10 @@ static int blkdev_open(struct inode *inode, struct file *filp)
 	filp->f_flags |= O_LARGEFILE;
 	filp->f_mode |= FMODE_NOWAIT | FMODE_BUF_RASYNC;
 
-	if (filp->f_flags & O_NDELAY)
-		filp->f_mode |= FMODE_NDELAY;
 	if (filp->f_flags & O_EXCL)
 		filp->f_mode |= FMODE_EXCL;
-	if ((filp->f_flags & O_ACCMODE) == 3)
-		filp->f_mode |= FMODE_WRITE_IOCTL;
 
-	bdev = blkdev_get_by_dev(inode->i_rdev, filp->f_mode,
+	bdev = blkdev_get_by_dev(inode->i_rdev, file_to_blk_mode(filp),
 				 (filp->f_mode & FMODE_EXCL) ? filp : NULL,
 				 NULL);
 	if (IS_ERR(bdev))
@@ -648,7 +662,7 @@ static long blkdev_fallocate(struct file *file, int mode, loff_t start,
 	filemap_invalidate_lock(inode->i_mapping);
 
 	/* Invalidate the page cache, including dirty pages. */
-	error = truncate_bdev_range(bdev, file->f_mode, start, end);
+	error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end);
 	if (error)
 		goto fail;
 
diff --git a/block/genhd.c b/block/genhd.c
index b56f8b5c88b3e3..2c2f9a7168223f 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -339,7 +339,7 @@ void disk_uevent(struct gendisk *disk, enum kobject_action action)
 }
 EXPORT_SYMBOL_GPL(disk_uevent);
 
-int disk_scan_partitions(struct gendisk *disk, fmode_t mode)
+int disk_scan_partitions(struct gendisk *disk, blk_mode_t mode)
 {
 	struct block_device *bdev;
 	int ret = 0;
@@ -357,7 +357,7 @@ int disk_scan_partitions(struct gendisk *disk, fmode_t mode)
 	 * synchronize with other exclusive openers and other partition
 	 * scanners.
 	 */
-	if (!(mode & FMODE_EXCL)) {
+	if (!(mode & BLK_OPEN_EXCL)) {
 		ret = bd_prepare_to_claim(disk->part0, disk_scan_partitions,
 					  NULL);
 		if (ret)
@@ -377,7 +377,7 @@ int disk_scan_partitions(struct gendisk *disk, fmode_t mode)
 	 * creat partition for underlying disk.
 	 */
 	clear_bit(GD_NEED_PART_SCAN, &disk->state);
-	if (!(mode & FMODE_EXCL))
+	if (!(mode & BLK_OPEN_EXCL))
 		bd_abort_claiming(disk->part0, disk_scan_partitions);
 	return ret;
 }
@@ -505,7 +505,7 @@ int __must_check device_add_disk(struct device *parent, struct gendisk *disk,
 
 		bdev_add(disk->part0, ddev->devt);
 		if (get_capacity(disk))
-			disk_scan_partitions(disk, FMODE_READ);
+			disk_scan_partitions(disk, BLK_OPEN_READ);
 
 		/*
 		 * Announce the disk and partitions after all partitions are
diff --git a/block/ioctl.c b/block/ioctl.c
index 3a10c34b8ef6d3..61bb94fd428187 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -82,7 +82,7 @@ static int compat_blkpg_ioctl(struct block_device *bdev,
 }
 #endif
 
-static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode,
+static int blk_ioctl_discard(struct block_device *bdev, blk_mode_t mode,
 		unsigned long arg)
 {
 	uint64_t range[2];
@@ -90,7 +90,7 @@ static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode,
 	struct inode *inode = bdev->bd_inode;
 	int err;
 
-	if (!(mode & FMODE_WRITE))
+	if (!(mode & BLK_OPEN_WRITE))
 		return -EBADF;
 
 	if (!bdev_max_discard_sectors(bdev))
@@ -120,14 +120,14 @@ static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode,
 	return err;
 }
 
-static int blk_ioctl_secure_erase(struct block_device *bdev, fmode_t mode,
+static int blk_ioctl_secure_erase(struct block_device *bdev, blk_mode_t mode,
 		void __user *argp)
 {
 	uint64_t start, len;
 	uint64_t range[2];
 	int err;
 
-	if (!(mode & FMODE_WRITE))
+	if (!(mode & BLK_OPEN_WRITE))
 		return -EBADF;
 	if (!bdev_max_secure_erase_sectors(bdev))
 		return -EOPNOTSUPP;
@@ -151,7 +151,7 @@ static int blk_ioctl_secure_erase(struct block_device *bdev, fmode_t mode,
 }
 
 
-static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode,
+static int blk_ioctl_zeroout(struct block_device *bdev, blk_mode_t mode,
 		unsigned long arg)
 {
 	uint64_t range[2];
@@ -159,7 +159,7 @@ static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode,
 	struct inode *inode = bdev->bd_inode;
 	int err;
 
-	if (!(mode & FMODE_WRITE))
+	if (!(mode & BLK_OPEN_WRITE))
 		return -EBADF;
 
 	if (copy_from_user(range, (void __user *)arg, sizeof(range)))
@@ -240,7 +240,7 @@ static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val)
  * drivers that implement only commands that are completely compatible
  * between 32-bit and 64-bit user space
  */
-int blkdev_compat_ptr_ioctl(struct block_device *bdev, fmode_t mode,
+int blkdev_compat_ptr_ioctl(struct block_device *bdev, blk_mode_t mode,
 			unsigned cmd, unsigned long arg)
 {
 	struct gendisk *disk = bdev->bd_disk;
@@ -439,7 +439,7 @@ static int compat_hdio_getgeo(struct block_device *bdev,
 #endif
 
 /* set the logical block size */
-static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
+static int blkdev_bszset(struct block_device *bdev, blk_mode_t mode,
 		int __user *argp)
 {
 	int ret, n;
@@ -451,7 +451,7 @@ static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
 	if (get_user(n, argp))
 		return -EFAULT;
 
-	if (mode & FMODE_EXCL)
+	if (mode & BLK_OPEN_EXCL)
 		return set_blocksize(bdev, n);
 
 	if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode, &bdev, NULL)))
@@ -467,7 +467,7 @@ static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
  * user space. Note the separate arg/argp parameters that are needed
  * to deal with the compat_ptr() conversion.
  */
-static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,
+static int blkdev_common_ioctl(struct block_device *bdev, blk_mode_t mode,
 			       unsigned int cmd, unsigned long arg,
 			       void __user *argp)
 {
@@ -560,18 +560,9 @@ long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 {
 	struct block_device *bdev = I_BDEV(file->f_mapping->host);
 	void __user *argp = (void __user *)arg;
-	fmode_t mode = file->f_mode;
+	blk_mode_t mode = file_to_blk_mode(file);
 	int ret;
 
-	/*
-	 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
-	 * to updated it before every ioctl.
-	 */
-	if (file->f_flags & O_NDELAY)
-		mode |= FMODE_NDELAY;
-	else
-		mode &= ~FMODE_NDELAY;
-
 	switch (cmd) {
 	/* These need separate implementations for the data structure */
 	case HDIO_GETGEO:
@@ -630,16 +621,7 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 	void __user *argp = compat_ptr(arg);
 	struct block_device *bdev = I_BDEV(file->f_mapping->host);
 	struct gendisk *disk = bdev->bd_disk;
-	fmode_t mode = file->f_mode;
-
-	/*
-	 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
-	 * to updated it before every ioctl.
-	 */
-	if (file->f_flags & O_NDELAY)
-		mode |= FMODE_NDELAY;
-	else
-		mode &= ~FMODE_NDELAY;
+	blk_mode_t mode = file_to_blk_mode(file);
 
 	switch (cmd) {
 	/* These need separate implementations for the data structure */
diff --git a/drivers/block/amiflop.c b/drivers/block/amiflop.c
index 9a0e9dc74a8c57..e460c9799d9f35 100644
--- a/drivers/block/amiflop.c
+++ b/drivers/block/amiflop.c
@@ -1532,7 +1532,7 @@ static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 	return 0;
 }
 
-static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
+static int fd_locked_ioctl(struct block_device *bdev, blk_mode_t mode,
 		    unsigned int cmd, unsigned long param)
 {
 	struct amiga_floppy_struct *p = bdev->bd_disk->private_data;
@@ -1607,7 +1607,7 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
 	return 0;
 }
 
-static int fd_ioctl(struct block_device *bdev, fmode_t mode,
+static int fd_ioctl(struct block_device *bdev, blk_mode_t mode,
 			     unsigned int cmd, unsigned long param)
 {
 	int ret;
@@ -1654,7 +1654,7 @@ static void fd_probe(int dev)
  * /dev/PS0 etc), and disallows simultaneous access to the same
  * drive with different device numbers.
  */
-static int floppy_open(struct gendisk *disk, fmode_t mode)
+static int floppy_open(struct gendisk *disk, blk_mode_t mode)
 {
 	int drive = disk->first_minor & 3;
 	int system = (disk->first_minor & 4) >> 2;
@@ -1673,10 +1673,9 @@ static int floppy_open(struct gendisk *disk, fmode_t mode)
 		mutex_unlock(&amiflop_mutex);
 		return -ENXIO;
 	}
-
-	if (mode & (FMODE_READ|FMODE_WRITE)) {
+	if (mode & (BLK_OPEN_READ | BLK_OPEN_WRITE)) {
 		disk_check_media_change(disk);
-		if (mode & FMODE_WRITE) {
+		if (mode & BLK_OPEN_WRITE) {
 			int wrprot;
 
 			get_fdc(drive);
@@ -1691,7 +1690,6 @@ static int floppy_open(struct gendisk *disk, fmode_t mode)
 			}
 		}
 	}
-
 	local_irq_save(flags);
 	fd_ref[drive]++;
 	fd_device[drive] = system;
diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index c3a39e02ab9571..cf6883756155a3 100644
--- a/drivers/block/aoe/aoeblk.c
+++ b/drivers/block/aoe/aoeblk.c
@@ -204,7 +204,7 @@ aoedisk_rm_debugfs(struct aoedev *d)
 }
 
 static int
-aoeblk_open(struct gendisk *disk, fmode_t mode)
+aoeblk_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct aoedev *d = disk->private_data;
 	ulong flags;
@@ -285,7 +285,7 @@ aoeblk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 }
 
 static int
-aoeblk_ioctl(struct block_device *bdev, fmode_t mode, uint cmd, ulong arg)
+aoeblk_ioctl(struct block_device *bdev, blk_mode_t mode, uint cmd, ulong arg)
 {
 	struct aoedev *d;
 
diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index 66a3242bb062c3..cd738cab725f39 100644
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -442,12 +442,12 @@ static void fd_times_out(struct timer_list *unused);
 static void finish_fdc( void );
 static void finish_fdc_done( int dummy );
 static void setup_req_params( int drive );
-static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
-                     cmd, unsigned long param);
+static int fd_locked_ioctl(struct block_device *bdev, blk_mode_t mode,
+		unsigned int cmd, unsigned long param);
 static void fd_probe( int drive );
 static int fd_test_drive_present( int drive );
 static void config_types( void );
-static int floppy_open(struct gendisk *disk, fmode_t mode);
+static int floppy_open(struct gendisk *disk, blk_mode_t mode);
 static void floppy_release(struct gendisk *disk);
 
 /************************* End of Prototypes **************************/
@@ -1581,7 +1581,7 @@ static blk_status_t ataflop_queue_rq(struct blk_mq_hw_ctx *hctx,
 	return BLK_STS_OK;
 }
 
-static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
+static int fd_locked_ioctl(struct block_device *bdev, blk_mode_t mode,
 		    unsigned int cmd, unsigned long param)
 {
 	struct gendisk *disk = bdev->bd_disk;
@@ -1768,7 +1768,7 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
 	}
 }
 
-static int fd_ioctl(struct block_device *bdev, fmode_t mode,
+static int fd_ioctl(struct block_device *bdev, blk_mode_t mode,
 			     unsigned int cmd, unsigned long arg)
 {
 	int ret;
@@ -1915,7 +1915,7 @@ static void __init config_types( void )
  * drive with different device numbers.
  */
 
-static int floppy_open(struct gendisk *disk, fmode_t mode)
+static int floppy_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct atari_floppy_struct *p = disk->private_data;
 	int type = disk->first_minor >> 2;
@@ -1924,23 +1924,22 @@ static int floppy_open(struct gendisk *disk, fmode_t mode)
 	if (p->ref && p->type != type)
 		return -EBUSY;
 
-	if (p->ref == -1 || (p->ref && mode & FMODE_EXCL))
+	if (p->ref == -1 || (p->ref && mode & BLK_OPEN_EXCL))
 		return -EBUSY;
-
-	if (mode & FMODE_EXCL)
+	if (mode & BLK_OPEN_EXCL)
 		p->ref = -1;
 	else
 		p->ref++;
 
 	p->type = type;
 
-	if (mode & FMODE_NDELAY)
+	if (mode & BLK_OPEN_NDELAY)
 		return 0;
 
-	if (mode & (FMODE_READ|FMODE_WRITE)) {
+	if (mode & (BLK_OPEN_READ | BLK_OPEN_WRITE)) {
 		if (disk_check_media_change(disk))
 			floppy_revalidate(disk);
-		if (mode & FMODE_WRITE) {
+		if (mode & BLK_OPEN_WRITE) {
 			if (p->wpstat) {
 				if (p->ref < 0)
 					p->ref = 0;
@@ -1953,7 +1952,7 @@ static int floppy_open(struct gendisk *disk, fmode_t mode)
 	return 0;
 }
 
-static int floppy_unlocked_open(struct gendisk *disk, fmode_t mode)
+static int floppy_unlocked_open(struct gendisk *disk, blk_mode_t mode)
 {
 	int ret;
 
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 7f3d7ca6ce6bcf..965f672557f22c 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -49,7 +49,7 @@
 #include "drbd_debugfs.h"
 
 static DEFINE_MUTEX(drbd_main_mutex);
-static int drbd_open(struct gendisk *disk, fmode_t mode);
+static int drbd_open(struct gendisk *disk, blk_mode_t mode);
 static void drbd_release(struct gendisk *gd);
 static void md_sync_timer_fn(struct timer_list *t);
 static int w_bitmap_io(struct drbd_work *w, int unused);
@@ -1882,7 +1882,7 @@ int drbd_send_all(struct drbd_connection *connection, struct socket *sock, void
 	return 0;
 }
 
-static int drbd_open(struct gendisk *disk, fmode_t mode)
+static int drbd_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct drbd_device *device = disk->private_data;
 	unsigned long flags;
@@ -1894,7 +1894,7 @@ static int drbd_open(struct gendisk *disk, fmode_t mode)
 	 * and no race with updating open_cnt */
 
 	if (device->state.role != R_PRIMARY) {
-		if (mode & FMODE_WRITE)
+		if (mode & BLK_OPEN_WRITE)
 			rv = -EROFS;
 		else if (!drbd_allow_oos)
 			rv = -EMEDIUMTYPE;
@@ -1911,6 +1911,7 @@ static int drbd_open(struct gendisk *disk, fmode_t mode)
 static void drbd_release(struct gendisk *gd)
 {
 	struct drbd_device *device = gd->private_data;
+
 	mutex_lock(&drbd_main_mutex);
 	device->open_cnt--;
 	mutex_unlock(&drbd_main_mutex);
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 10b1e5171332f7..cddae6f4b00fea 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -1640,7 +1640,7 @@ static struct block_device *open_backing_dev(struct drbd_device *device,
 	struct block_device *bdev;
 	int err = 0;
 
-	bdev = blkdev_get_by_path(bdev_path, FMODE_READ | FMODE_WRITE,
+	bdev = blkdev_get_by_path(bdev_path, BLK_OPEN_READ | BLK_OPEN_WRITE,
 				  claim_ptr, NULL);
 	if (IS_ERR(bdev)) {
 		drbd_err(device, "open(\"%s\") failed with %ld\n",
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index d79fac288a73dc..2db9b186b977ac 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -3394,8 +3394,8 @@ static bool valid_floppy_drive_params(const short autodetect[FD_AUTODETECT_SIZE]
 	return true;
 }
 
-static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
-		    unsigned long param)
+static int fd_locked_ioctl(struct block_device *bdev, blk_mode_t mode,
+		unsigned int cmd, unsigned long param)
 {
 	int drive = (long)bdev->bd_disk->private_data;
 	int type = ITYPE(drive_state[drive].fd_device);
@@ -3428,7 +3428,8 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
 		return ret;
 
 	/* permission checks */
-	if (((cmd & 0x40) && !(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL))) ||
+	if (((cmd & 0x40) &&
+	     !(mode & (BLK_OPEN_WRITE | BLK_OPEN_WRITE_IOCTL))) ||
 	    ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)))
 		return -EPERM;
 
@@ -3566,7 +3567,7 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
 	return 0;
 }
 
-static int fd_ioctl(struct block_device *bdev, fmode_t mode,
+static int fd_ioctl(struct block_device *bdev, blk_mode_t mode,
 			     unsigned int cmd, unsigned long param)
 {
 	int ret;
@@ -3654,8 +3655,8 @@ struct compat_floppy_write_errors {
 #define FDGETFDCSTAT32 _IOR(2, 0x15, struct compat_floppy_fdc_state)
 #define FDWERRORGET32  _IOR(2, 0x17, struct compat_floppy_write_errors)
 
-static int compat_set_geometry(struct block_device *bdev, fmode_t mode, unsigned int cmd,
-		    struct compat_floppy_struct __user *arg)
+static int compat_set_geometry(struct block_device *bdev, blk_mode_t mode,
+		unsigned int cmd, struct compat_floppy_struct __user *arg)
 {
 	struct floppy_struct v;
 	int drive, type;
@@ -3664,7 +3665,7 @@ static int compat_set_geometry(struct block_device *bdev, fmode_t mode, unsigned
 	BUILD_BUG_ON(offsetof(struct floppy_struct, name) !=
 		     offsetof(struct compat_floppy_struct, name));
 
-	if (!(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL)))
+	if (!(mode & (BLK_OPEN_WRITE | BLK_OPEN_WRITE_IOCTL)))
 		return -EPERM;
 
 	memset(&v, 0, sizeof(struct floppy_struct));
@@ -3861,8 +3862,8 @@ static int compat_werrorget(int drive,
 	return 0;
 }
 
-static int fd_compat_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
-		    unsigned long param)
+static int fd_compat_ioctl(struct block_device *bdev, blk_mode_t mode,
+		unsigned int cmd, unsigned long param)
 {
 	int drive = (long)bdev->bd_disk->private_data;
 	switch (cmd) {
@@ -3984,7 +3985,7 @@ static void floppy_release(struct gendisk *disk)
  * /dev/PS0 etc), and disallows simultaneous access to the same
  * drive with different device numbers.
  */
-static int floppy_open(struct gendisk *disk, fmode_t mode)
+static int floppy_open(struct gendisk *disk, blk_mode_t mode)
 {
 	int drive = (long)disk->private_data;
 	int old_dev, new_dev;
@@ -4049,9 +4050,8 @@ static int floppy_open(struct gendisk *disk, fmode_t mode)
 
 	if (fdc_state[FDC(drive)].rawcmd == 1)
 		fdc_state[FDC(drive)].rawcmd = 2;
-
-	if (!(mode & FMODE_NDELAY)) {
-		if (mode & (FMODE_READ|FMODE_WRITE)) {
+	if (!(mode & BLK_OPEN_NDELAY)) {
+		if (mode & (BLK_OPEN_READ | BLK_OPEN_WRITE)) {
 			drive_state[drive].last_checked = 0;
 			clear_bit(FD_OPEN_SHOULD_FAIL_BIT,
 				  &drive_state[drive].flags);
@@ -4063,7 +4063,7 @@ static int floppy_open(struct gendisk *disk, fmode_t mode)
 				goto out;
 		}
 		res = -EROFS;
-		if ((mode & FMODE_WRITE) &&
+		if ((mode & BLK_OPEN_WRITE) &&
 		    !test_bit(FD_DISK_WRITABLE_BIT, &drive_state[drive].flags))
 			goto out;
 	}
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index ca40d24572aea6..37511d2b2caf7d 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -990,7 +990,7 @@ loop_set_status_from_info(struct loop_device *lo,
 	return 0;
 }
 
-static int loop_configure(struct loop_device *lo, fmode_t mode,
+static int loop_configure(struct loop_device *lo, blk_mode_t mode,
 			  struct block_device *bdev,
 			  const struct loop_config *config)
 {
@@ -1014,7 +1014,7 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
 	 * If we don't hold exclusive handle for the device, upgrade to it
 	 * here to avoid changing device under exclusive owner.
 	 */
-	if (!(mode & FMODE_EXCL)) {
+	if (!(mode & BLK_OPEN_EXCL)) {
 		error = bd_prepare_to_claim(bdev, loop_configure, NULL);
 		if (error)
 			goto out_putf;
@@ -1050,7 +1050,7 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
 	if (error)
 		goto out_unlock;
 
-	if (!(file->f_mode & FMODE_WRITE) || !(mode & FMODE_WRITE) ||
+	if (!(file->f_mode & FMODE_WRITE) || !(mode & BLK_OPEN_WRITE) ||
 	    !file->f_op->write_iter)
 		lo->lo_flags |= LO_FLAGS_READ_ONLY;
 
@@ -1116,7 +1116,7 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
 	if (partscan)
 		loop_reread_partitions(lo);
 
-	if (!(mode & FMODE_EXCL))
+	if (!(mode & BLK_OPEN_EXCL))
 		bd_abort_claiming(bdev, loop_configure);
 
 	return 0;
@@ -1124,7 +1124,7 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
 out_unlock:
 	loop_global_unlock(lo, is_loop);
 out_bdev:
-	if (!(mode & FMODE_EXCL))
+	if (!(mode & BLK_OPEN_EXCL))
 		bd_abort_claiming(bdev, loop_configure);
 out_putf:
 	fput(file);
@@ -1528,7 +1528,7 @@ static int lo_simple_ioctl(struct loop_device *lo, unsigned int cmd,
 	return err;
 }
 
-static int lo_ioctl(struct block_device *bdev, fmode_t mode,
+static int lo_ioctl(struct block_device *bdev, blk_mode_t mode,
 	unsigned int cmd, unsigned long arg)
 {
 	struct loop_device *lo = bdev->bd_disk->private_data;
@@ -1563,24 +1563,22 @@ static int lo_ioctl(struct block_device *bdev, fmode_t mode,
 		return loop_clr_fd(lo);
 	case LOOP_SET_STATUS:
 		err = -EPERM;
-		if ((mode & FMODE_WRITE) || capable(CAP_SYS_ADMIN)) {
+		if ((mode & BLK_OPEN_WRITE) || capable(CAP_SYS_ADMIN))
 			err = loop_set_status_old(lo, argp);
-		}
 		break;
 	case LOOP_GET_STATUS:
 		return loop_get_status_old(lo, argp);
 	case LOOP_SET_STATUS64:
 		err = -EPERM;
-		if ((mode & FMODE_WRITE) || capable(CAP_SYS_ADMIN)) {
+		if ((mode & BLK_OPEN_WRITE) || capable(CAP_SYS_ADMIN))
 			err = loop_set_status64(lo, argp);
-		}
 		break;
 	case LOOP_GET_STATUS64:
 		return loop_get_status64(lo, argp);
 	case LOOP_SET_CAPACITY:
 	case LOOP_SET_DIRECT_IO:
 	case LOOP_SET_BLOCK_SIZE:
-		if (!(mode & FMODE_WRITE) && !capable(CAP_SYS_ADMIN))
+		if (!(mode & BLK_OPEN_WRITE) && !capable(CAP_SYS_ADMIN))
 			return -EPERM;
 		fallthrough;
 	default:
@@ -1691,7 +1689,7 @@ loop_get_status_compat(struct loop_device *lo,
 	return err;
 }
 
-static int lo_compat_ioctl(struct block_device *bdev, fmode_t mode,
+static int lo_compat_ioctl(struct block_device *bdev, blk_mode_t mode,
 			   unsigned int cmd, unsigned long arg)
 {
 	struct loop_device *lo = bdev->bd_disk->private_data;
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index 815d77ba63819e..b200950e8fb5f9 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -3041,7 +3041,7 @@ static int rssd_disk_name_format(char *prefix,
  *                 structure pointer.
  */
 static int mtip_block_ioctl(struct block_device *dev,
-			    fmode_t mode,
+			    blk_mode_t mode,
 			    unsigned cmd,
 			    unsigned long arg)
 {
@@ -3079,7 +3079,7 @@ static int mtip_block_ioctl(struct block_device *dev,
  *                 structure pointer.
  */
 static int mtip_block_compat_ioctl(struct block_device *dev,
-			    fmode_t mode,
+			    blk_mode_t mode,
 			    unsigned cmd,
 			    unsigned long arg)
 {
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 5a02fd6b3e7e95..33b6c8e6ca6b12 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -1502,7 +1502,7 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
 	return -ENOTTY;
 }
 
-static int nbd_ioctl(struct block_device *bdev, fmode_t mode,
+static int nbd_ioctl(struct block_device *bdev, blk_mode_t mode,
 		     unsigned int cmd, unsigned long arg)
 {
 	struct nbd_device *nbd = bdev->bd_disk->private_data;
@@ -1553,7 +1553,7 @@ static struct nbd_config *nbd_alloc_config(void)
 	return config;
 }
 
-static int nbd_open(struct gendisk *disk, fmode_t mode)
+static int nbd_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct nbd_device *nbd;
 	int ret = 0;
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 0842a45cba167e..ba5b2257f809df 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -2113,7 +2113,7 @@ static int pkt_open_write(struct pktcdvd_device *pd)
 /*
  * called at open time.
  */
-static int pkt_open_dev(struct pktcdvd_device *pd, fmode_t write)
+static int pkt_open_dev(struct pktcdvd_device *pd, bool write)
 {
 	int ret;
 	long lba;
@@ -2125,7 +2125,7 @@ static int pkt_open_dev(struct pktcdvd_device *pd, fmode_t write)
 	 * to read/write from/to it. It is already opened in O_NONBLOCK mode
 	 * so open should not fail.
 	 */
-	bdev = blkdev_get_by_dev(pd->bdev->bd_dev, FMODE_READ, pd, NULL);
+	bdev = blkdev_get_by_dev(pd->bdev->bd_dev, BLK_OPEN_READ, pd, NULL);
 	if (IS_ERR(bdev)) {
 		ret = PTR_ERR(bdev);
 		goto out;
@@ -2203,7 +2203,7 @@ static struct pktcdvd_device *pkt_find_dev_from_minor(unsigned int dev_minor)
 	return pkt_devs[dev_minor];
 }
 
-static int pkt_open(struct gendisk *disk, fmode_t mode)
+static int pkt_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct pktcdvd_device *pd = NULL;
 	int ret;
@@ -2219,13 +2219,13 @@ static int pkt_open(struct gendisk *disk, fmode_t mode)
 
 	pd->refcnt++;
 	if (pd->refcnt > 1) {
-		if ((mode & FMODE_WRITE) &&
+		if ((mode & BLK_OPEN_WRITE) &&
 		    !test_bit(PACKET_WRITABLE, &pd->flags)) {
 			ret = -EBUSY;
 			goto out_dec;
 		}
 	} else {
-		ret = pkt_open_dev(pd, mode & FMODE_WRITE);
+		ret = pkt_open_dev(pd, mode & BLK_OPEN_WRITE);
 		if (ret)
 			goto out_dec;
 		/*
@@ -2234,7 +2234,6 @@ static int pkt_open(struct gendisk *disk, fmode_t mode)
 		 */
 		set_blocksize(disk->part0, CD_FRAMESIZE);
 	}
-
 	mutex_unlock(&ctl_mutex);
 	mutex_unlock(&pktcdvd_mutex);
 	return 0;
@@ -2530,7 +2529,8 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev)
 		}
 	}
 
-	bdev = blkdev_get_by_dev(dev, FMODE_READ | FMODE_NDELAY, NULL, NULL);
+	bdev = blkdev_get_by_dev(dev, BLK_OPEN_READ | BLK_OPEN_NDELAY, NULL,
+				 NULL);
 	if (IS_ERR(bdev))
 		return PTR_ERR(bdev);
 	sdev = scsi_device_from_queue(bdev->bd_disk->queue);
@@ -2566,7 +2566,8 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev)
 	return -ENOMEM;
 }
 
-static int pkt_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg)
+static int pkt_ioctl(struct block_device *bdev, blk_mode_t mode,
+		unsigned int cmd, unsigned long arg)
 {
 	struct pktcdvd_device *pd = bdev->bd_disk->private_data;
 	int ret;
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 5215eff94fe94f..39f2903fe25fed 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -660,7 +660,7 @@ static bool pending_result_dec(struct pending_result *pending, int *result)
 	return true;
 }
 
-static int rbd_open(struct gendisk *disk, fmode_t mode)
+static int rbd_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct rbd_device *rbd_dev = disk->private_data;
 	bool removing = false;
diff --git a/drivers/block/rnbd/rnbd-clt.c b/drivers/block/rnbd/rnbd-clt.c
index d5261d36d78630..b0550b68645d38 100644
--- a/drivers/block/rnbd/rnbd-clt.c
+++ b/drivers/block/rnbd/rnbd-clt.c
@@ -921,11 +921,11 @@ rnbd_clt_session *find_or_create_sess(const char *sessname, bool *first)
 	return sess;
 }
 
-static int rnbd_client_open(struct gendisk *disk, fmode_t mode)
+static int rnbd_client_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct rnbd_clt_dev *dev = disk->private_data;
 
-	if (get_disk_ro(dev->gd) && (mode & FMODE_WRITE))
+	if (get_disk_ro(dev->gd) && (mode & BLK_OPEN_WRITE))
 		return -EPERM;
 
 	if (dev->dev_state == DEV_STATE_UNMAPPED ||
diff --git a/drivers/block/rnbd/rnbd-srv.c b/drivers/block/rnbd/rnbd-srv.c
index b680071342b898..7327dc8e8d2be2 100644
--- a/drivers/block/rnbd/rnbd-srv.c
+++ b/drivers/block/rnbd/rnbd-srv.c
@@ -681,14 +681,14 @@ static int process_msg_open(struct rnbd_srv_session *srv_sess,
 	struct rnbd_srv_sess_dev *srv_sess_dev;
 	const struct rnbd_msg_open *open_msg = msg;
 	struct block_device *bdev;
-	fmode_t open_flags = FMODE_READ;
+	blk_mode_t open_flags = BLK_OPEN_READ;
 	char *full_path;
 	struct rnbd_msg_open_rsp *rsp = data;
 
 	trace_process_msg_open(srv_sess, open_msg);
 
 	if (open_msg->access_mode != RNBD_ACCESS_RO)
-		open_flags |= FMODE_WRITE;
+		open_flags |= BLK_OPEN_WRITE;
 
 	mutex_lock(&srv_sess->lock);
 
diff --git a/drivers/block/sunvdc.c b/drivers/block/sunvdc.c
index 9fa821fa76b07b..7bf4b48e2282e7 100644
--- a/drivers/block/sunvdc.c
+++ b/drivers/block/sunvdc.c
@@ -139,7 +139,7 @@ static int vdc_getgeo(struct block_device *bdev, struct hd_geometry *geo)
  * when vdisk_mtype is VD_MEDIA_TYPE_CD or VD_MEDIA_TYPE_DVD.
  * Needed to be able to install inside an ldom from an iso image.
  */
-static int vdc_ioctl(struct block_device *bdev, fmode_t mode,
+static int vdc_ioctl(struct block_device *bdev, blk_mode_t mode,
 		     unsigned command, unsigned long argument)
 {
 	struct vdc_port *port = bdev->bd_disk->private_data;
diff --git a/drivers/block/swim.c b/drivers/block/swim.c
index a629b38dec660a..651009b3a601eb 100644
--- a/drivers/block/swim.c
+++ b/drivers/block/swim.c
@@ -608,20 +608,18 @@ static void setup_medium(struct floppy_state *fs)
 	}
 }
 
-static int floppy_open(struct gendisk *disk, fmode_t mode)
+static int floppy_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct floppy_state *fs = disk->private_data;
 	struct swim __iomem *base = fs->swd->base;
 	int err;
 
-	if (fs->ref_count == -1 || (fs->ref_count && mode & FMODE_EXCL))
+	if (fs->ref_count == -1 || (fs->ref_count && mode & BLK_OPEN_EXCL))
 		return -EBUSY;
-
-	if (mode & FMODE_EXCL)
+	if (mode & BLK_OPEN_EXCL)
 		fs->ref_count = -1;
 	else
 		fs->ref_count++;
-
 	swim_write(base, setup, S_IBM_DRIVE  | S_FCLK_DIV2);
 	udelay(10);
 	swim_drive(base, fs->location);
@@ -636,10 +634,10 @@ static int floppy_open(struct gendisk *disk, fmode_t mode)
 
 	set_capacity(fs->disk, fs->total_secs);
 
-	if (mode & FMODE_NDELAY)
+	if (mode & BLK_OPEN_NDELAY)
 		return 0;
 
-	if (mode & (FMODE_READ|FMODE_WRITE)) {
+	if (mode & (BLK_OPEN_READ | BLK_OPEN_WRITE)) {
 		if (disk_check_media_change(disk) && fs->disk_in)
 			fs->ejected = 0;
 		if ((mode & FMODE_WRITE) && fs->write_protected) {
@@ -659,7 +657,7 @@ static int floppy_open(struct gendisk *disk, fmode_t mode)
 	return err;
 }
 
-static int floppy_unlocked_open(struct gendisk *disk, fmode_t mode)
+static int floppy_unlocked_open(struct gendisk *disk, blk_mode_t mode)
 {
 	int ret;
 
@@ -686,7 +684,7 @@ static void floppy_release(struct gendisk *disk)
 	mutex_unlock(&swim_mutex);
 }
 
-static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
+static int floppy_ioctl(struct block_device *bdev, blk_mode_t mode,
 			unsigned int cmd, unsigned long param)
 {
 	struct floppy_state *fs = bdev->bd_disk->private_data;
diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c
index b696deff3d8ba1..945a0315425070 100644
--- a/drivers/block/swim3.c
+++ b/drivers/block/swim3.c
@@ -246,9 +246,9 @@ static int grab_drive(struct floppy_state *fs, enum swim_state state,
 		      int interruptible);
 static void release_drive(struct floppy_state *fs);
 static int fd_eject(struct floppy_state *fs);
-static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
+static int floppy_ioctl(struct block_device *bdev, blk_mode_t mode,
 			unsigned int cmd, unsigned long param);
-static int floppy_open(struct gendisk *disk, fmode_t mode);
+static int floppy_open(struct gendisk *disk, blk_mode_t mode);
 static unsigned int floppy_check_events(struct gendisk *disk,
 					unsigned int clearing);
 static int floppy_revalidate(struct gendisk *disk);
@@ -882,7 +882,7 @@ static int fd_eject(struct floppy_state *fs)
 static struct floppy_struct floppy_type =
 	{ 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,NULL };	/*  7 1.44MB 3.5"   */
 
-static int floppy_locked_ioctl(struct block_device *bdev, fmode_t mode,
+static int floppy_locked_ioctl(struct block_device *bdev,
 			unsigned int cmd, unsigned long param)
 {
 	struct floppy_state *fs = bdev->bd_disk->private_data;
@@ -910,7 +910,7 @@ static int floppy_locked_ioctl(struct block_device *bdev, fmode_t mode,
 	return -ENOTTY;
 }
 
-static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
+static int floppy_ioctl(struct block_device *bdev, blk_mode_t mode,
 				 unsigned int cmd, unsigned long param)
 {
 	int ret;
@@ -922,7 +922,7 @@ static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
 	return ret;
 }
 
-static int floppy_open(struct gendisk *disk, fmode_t mode)
+static int floppy_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct floppy_state *fs = disk->private_data;
 	struct swim3 __iomem *sw = fs->swim3;
@@ -957,18 +957,18 @@ static int floppy_open(struct gendisk *disk, fmode_t mode)
 		swim3_action(fs, SETMFM);
 		swim3_select(fs, RELAX);
 
-	} else if (fs->ref_count == -1 || mode & FMODE_EXCL)
+	} else if (fs->ref_count == -1 || mode & BLK_OPEN_EXCL)
 		return -EBUSY;
 
-	if (err == 0 && (mode & FMODE_NDELAY) == 0
-	    && (mode & (FMODE_READ|FMODE_WRITE))) {
+	if (err == 0 && !(mode & BLK_OPEN_NDELAY) &&
+	    (mode & (BLK_OPEN_READ | BLK_OPEN_WRITE))) {
 		if (disk_check_media_change(disk))
 			floppy_revalidate(disk);
 		if (fs->ejected)
 			err = -ENXIO;
 	}
 
-	if (err == 0 && (mode & FMODE_WRITE)) {
+	if (err == 0 && (mode & BLK_OPEN_WRITE)) {
 		if (fs->write_prot < 0)
 			fs->write_prot = swim3_readbit(fs, WRITE_PROT);
 		if (fs->write_prot)
@@ -984,7 +984,7 @@ static int floppy_open(struct gendisk *disk, fmode_t mode)
 		return err;
 	}
 
-	if (mode & FMODE_EXCL)
+	if (mode & BLK_OPEN_EXCL)
 		fs->ref_count = -1;
 	else
 		++fs->ref_count;
@@ -992,12 +992,12 @@ static int floppy_open(struct gendisk *disk, fmode_t mode)
 	return 0;
 }
 
-static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode)
+static int floppy_unlocked_open(struct gendisk *disk, blk_mode_t mode)
 {
 	int ret;
 
 	mutex_lock(&swim3_mutex);
-	ret = floppy_open(bdev, mode);
+	ret = floppy_open(disk, mode);
 	mutex_unlock(&swim3_mutex);
 
 	return ret;
diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c
index 92c900ac2ebcb6..9fdc4c7f908dd0 100644
--- a/drivers/block/ublk_drv.c
+++ b/drivers/block/ublk_drv.c
@@ -447,7 +447,7 @@ static void ublk_store_owner_uid_gid(unsigned int *owner_uid,
 	*owner_gid = from_kgid(&init_user_ns, gid);
 }
 
-static int ublk_open(struct gendisk *disk, fmode_t mode)
+static int ublk_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct ublk_device *ub = disk->private_data;
 
diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
index 141b60aad57038..bb66178c432b0d 100644
--- a/drivers/block/xen-blkback/xenbus.c
+++ b/drivers/block/xen-blkback/xenbus.c
@@ -492,7 +492,7 @@ static int xen_vbd_create(struct xen_blkif *blkif, blkif_vdev_t handle,
 	vbd->pdevice  = MKDEV(major, minor);
 
 	bdev = blkdev_get_by_dev(vbd->pdevice, vbd->readonly ?
-				 FMODE_READ : FMODE_WRITE, NULL, NULL);
+				 BLK_OPEN_READ : BLK_OPEN_WRITE, NULL, NULL);
 
 	if (IS_ERR(bdev)) {
 		pr_warn("xen_vbd_create: device %08x could not be opened\n",
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 23ed258b57f0e5..52e74adbaad675 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -509,7 +509,7 @@ static int blkif_getgeo(struct block_device *bd, struct hd_geometry *hg)
 	return 0;
 }
 
-static int blkif_ioctl(struct block_device *bdev, fmode_t mode,
+static int blkif_ioctl(struct block_device *bdev, blk_mode_t mode,
 		       unsigned command, unsigned long argument)
 {
 	struct blkfront_info *info = bdev->bd_disk->private_data;
diff --git a/drivers/block/z2ram.c b/drivers/block/z2ram.c
index a2e41cc084ca3a..11493167b0a848 100644
--- a/drivers/block/z2ram.c
+++ b/drivers/block/z2ram.c
@@ -140,7 +140,7 @@ static void get_chipram(void)
 	return;
 }
 
-static int z2_open(struct gendisk *disk, fmode_t mode)
+static int z2_open(struct gendisk *disk, blk_mode_t mode)
 {
 	int device = disk->first_minor;
 	int max_z2_map = (Z2RAM_SIZE / Z2RAM_CHUNKSIZE) * sizeof(z2ram_map[0]);
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 21615d67a9bd66..1867f378b319f4 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -507,8 +507,8 @@ static ssize_t backing_dev_store(struct device *dev,
 		goto out;
 	}
 
-	bdev = blkdev_get_by_dev(inode->i_rdev, FMODE_READ | FMODE_WRITE, zram,
-				 NULL);
+	bdev = blkdev_get_by_dev(inode->i_rdev, BLK_OPEN_READ | BLK_OPEN_WRITE,
+				 zram, NULL);
 	if (IS_ERR(bdev)) {
 		err = PTR_ERR(bdev);
 		bdev = NULL;
@@ -2097,7 +2097,7 @@ static ssize_t reset_store(struct device *dev,
 	return len;
 }
 
-static int zram_open(struct gendisk *disk, fmode_t mode)
+static int zram_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct zram *zram = disk->private_data;
 
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index 998b03fe976e22..44a5b6b20962f9 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -1146,7 +1146,7 @@ int open_for_data(struct cdrom_device_info *cdi)
  * is in their own interest: device control becomes a lot easier
  * this way.
  */
-int cdrom_open(struct cdrom_device_info *cdi, fmode_t mode)
+int cdrom_open(struct cdrom_device_info *cdi, blk_mode_t mode)
 {
 	int ret;
 
@@ -1155,7 +1155,7 @@ int cdrom_open(struct cdrom_device_info *cdi, fmode_t mode)
 	/* if this was a O_NONBLOCK open and we should honor the flags,
 	 * do a quick open without drive/disc integrity checks. */
 	cdi->use_count++;
-	if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
+	if ((mode & BLK_OPEN_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
 		ret = cdi->ops->open(cdi, 1);
 	} else {
 		ret = open_for_data(cdi);
diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
index dac148d4d1feda..3a46e27479ff64 100644
--- a/drivers/cdrom/gdrom.c
+++ b/drivers/cdrom/gdrom.c
@@ -474,7 +474,7 @@ static const struct cdrom_device_ops gdrom_ops = {
 				  CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R,
 };
 
-static int gdrom_bdops_open(struct gendisk *disk, fmode_t mode)
+static int gdrom_bdops_open(struct gendisk *disk, blk_mode_t mode)
 {
 	int ret;
 
@@ -499,7 +499,7 @@ static unsigned int gdrom_bdops_check_events(struct gendisk *disk,
 	return cdrom_check_events(gd.cd_info, clearing);
 }
 
-static int gdrom_bdops_ioctl(struct block_device *bdev, fmode_t mode,
+static int gdrom_bdops_ioctl(struct block_device *bdev, blk_mode_t mode,
 	unsigned cmd, unsigned long arg)
 {
 	int ret;
diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h
index aebb7ef10e631a..700dc5588d5fc6 100644
--- a/drivers/md/bcache/bcache.h
+++ b/drivers/md/bcache/bcache.h
@@ -275,7 +275,7 @@ struct bcache_device {
 
 	int (*cache_miss)(struct btree *b, struct search *s,
 			  struct bio *bio, unsigned int sectors);
-	int (*ioctl)(struct bcache_device *d, fmode_t mode,
+	int (*ioctl)(struct bcache_device *d, blk_mode_t mode,
 		     unsigned int cmd, unsigned long arg);
 };
 
diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
index 67a2e29e0b40e0..a9b1f3896249b3 100644
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -1228,7 +1228,7 @@ void cached_dev_submit_bio(struct bio *bio)
 		detached_dev_do_request(d, bio, orig_bdev, start_time);
 }
 
-static int cached_dev_ioctl(struct bcache_device *d, fmode_t mode,
+static int cached_dev_ioctl(struct bcache_device *d, blk_mode_t mode,
 			    unsigned int cmd, unsigned long arg)
 {
 	struct cached_dev *dc = container_of(d, struct cached_dev, disk);
@@ -1318,7 +1318,7 @@ void flash_dev_submit_bio(struct bio *bio)
 	continue_at(cl, search_free, NULL);
 }
 
-static int flash_dev_ioctl(struct bcache_device *d, fmode_t mode,
+static int flash_dev_ioctl(struct bcache_device *d, blk_mode_t mode,
 			   unsigned int cmd, unsigned long arg)
 {
 	return -ENOTTY;
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 7022fea396f25e..1f829e74db0a31 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -732,7 +732,7 @@ static int prio_read(struct cache *ca, uint64_t bucket)
 
 /* Bcache device */
 
-static int open_dev(struct gendisk *disk, fmode_t mode)
+static int open_dev(struct gendisk *disk, blk_mode_t mode)
 {
 	struct bcache_device *d = disk->private_data;
 
@@ -750,7 +750,7 @@ static void release_dev(struct gendisk *b)
 	closure_put(&d->cl);
 }
 
-static int ioctl_dev(struct block_device *b, fmode_t mode,
+static int ioctl_dev(struct block_device *b, blk_mode_t mode,
 		     unsigned int cmd, unsigned long arg)
 {
 	struct bcache_device *d = b->bd_disk->private_data;
@@ -2558,7 +2558,7 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr,
 
 	ret = -EINVAL;
 	err = "failed to open device";
-	bdev = blkdev_get_by_path(strim(path), FMODE_READ | FMODE_WRITE,
+	bdev = blkdev_get_by_path(strim(path), BLK_OPEN_READ | BLK_OPEN_WRITE,
 				  bcache_kobj, NULL);
 	if (IS_ERR(bdev)) {
 		if (bdev == ERR_PTR(-EBUSY)) {
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
index 872896218550c9..911f73f7ebbaa0 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -2051,8 +2051,8 @@ static int parse_metadata_dev(struct cache_args *ca, struct dm_arg_set *as,
 	if (!at_least_one_arg(as, error))
 		return -EINVAL;
 
-	r = dm_get_device(ca->ti, dm_shift_arg(as), FMODE_READ | FMODE_WRITE,
-			  &ca->metadata_dev);
+	r = dm_get_device(ca->ti, dm_shift_arg(as),
+			  BLK_OPEN_READ | BLK_OPEN_WRITE, &ca->metadata_dev);
 	if (r) {
 		*error = "Error opening metadata device";
 		return r;
@@ -2074,8 +2074,8 @@ static int parse_cache_dev(struct cache_args *ca, struct dm_arg_set *as,
 	if (!at_least_one_arg(as, error))
 		return -EINVAL;
 
-	r = dm_get_device(ca->ti, dm_shift_arg(as), FMODE_READ | FMODE_WRITE,
-			  &ca->cache_dev);
+	r = dm_get_device(ca->ti, dm_shift_arg(as),
+			  BLK_OPEN_READ | BLK_OPEN_WRITE, &ca->cache_dev);
 	if (r) {
 		*error = "Error opening cache device";
 		return r;
@@ -2093,8 +2093,8 @@ static int parse_origin_dev(struct cache_args *ca, struct dm_arg_set *as,
 	if (!at_least_one_arg(as, error))
 		return -EINVAL;
 
-	r = dm_get_device(ca->ti, dm_shift_arg(as), FMODE_READ | FMODE_WRITE,
-			  &ca->origin_dev);
+	r = dm_get_device(ca->ti, dm_shift_arg(as),
+			  BLK_OPEN_READ | BLK_OPEN_WRITE, &ca->origin_dev);
 	if (r) {
 		*error = "Error opening origin device";
 		return r;
diff --git a/drivers/md/dm-clone-target.c b/drivers/md/dm-clone-target.c
index f467cdb5a02237..94b2fc33f64be3 100644
--- a/drivers/md/dm-clone-target.c
+++ b/drivers/md/dm-clone-target.c
@@ -1683,8 +1683,8 @@ static int parse_metadata_dev(struct clone *clone, struct dm_arg_set *as, char *
 	int r;
 	sector_t metadata_dev_size;
 
-	r = dm_get_device(clone->ti, dm_shift_arg(as), FMODE_READ | FMODE_WRITE,
-			  &clone->metadata_dev);
+	r = dm_get_device(clone->ti, dm_shift_arg(as),
+			  BLK_OPEN_READ | BLK_OPEN_WRITE, &clone->metadata_dev);
 	if (r) {
 		*error = "Error opening metadata device";
 		return r;
@@ -1703,8 +1703,8 @@ static int parse_dest_dev(struct clone *clone, struct dm_arg_set *as, char **err
 	int r;
 	sector_t dest_dev_size;
 
-	r = dm_get_device(clone->ti, dm_shift_arg(as), FMODE_READ | FMODE_WRITE,
-			  &clone->dest_dev);
+	r = dm_get_device(clone->ti, dm_shift_arg(as),
+			  BLK_OPEN_READ | BLK_OPEN_WRITE, &clone->dest_dev);
 	if (r) {
 		*error = "Error opening destination device";
 		return r;
@@ -1725,7 +1725,7 @@ static int parse_source_dev(struct clone *clone, struct dm_arg_set *as, char **e
 	int r;
 	sector_t source_dev_size;
 
-	r = dm_get_device(clone->ti, dm_shift_arg(as), FMODE_READ,
+	r = dm_get_device(clone->ti, dm_shift_arg(as), BLK_OPEN_READ,
 			  &clone->source_dev);
 	if (r) {
 		*error = "Error opening source device";
diff --git a/drivers/md/dm-core.h b/drivers/md/dm-core.h
index aecab0c0720f77..ce913ad91a52b9 100644
--- a/drivers/md/dm-core.h
+++ b/drivers/md/dm-core.h
@@ -207,11 +207,10 @@ struct dm_table {
 	unsigned integrity_added:1;
 
 	/*
-	 * Indicates the rw permissions for the new logical
-	 * device.  This should be a combination of FMODE_READ
-	 * and FMODE_WRITE.
+	 * Indicates the rw permissions for the new logical device.  This
+	 * should be a combination of BLK_OPEN_READ and BLK_OPEN_WRITE.
 	 */
-	fmode_t mode;
+	blk_mode_t mode;
 
 	/* a list of devices used by this table */
 	struct list_head devices;
diff --git a/drivers/md/dm-era-target.c b/drivers/md/dm-era-target.c
index 0d70914217eedc..6acfa5bf97a400 100644
--- a/drivers/md/dm-era-target.c
+++ b/drivers/md/dm-era-target.c
@@ -1482,14 +1482,16 @@ static int era_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 
 	era->ti = ti;
 
-	r = dm_get_device(ti, argv[0], FMODE_READ | FMODE_WRITE, &era->metadata_dev);
+	r = dm_get_device(ti, argv[0], BLK_OPEN_READ | BLK_OPEN_WRITE,
+			  &era->metadata_dev);
 	if (r) {
 		ti->error = "Error opening metadata device";
 		era_destroy(era);
 		return -EINVAL;
 	}
 
-	r = dm_get_device(ti, argv[1], FMODE_READ | FMODE_WRITE, &era->origin_dev);
+	r = dm_get_device(ti, argv[1], BLK_OPEN_READ | BLK_OPEN_WRITE,
+			  &era->origin_dev);
 	if (r) {
 		ti->error = "Error opening data device";
 		era_destroy(era);
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index cc77cf3d410921..8ba4cbb92351f5 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -861,7 +861,7 @@ static void __dev_status(struct mapped_device *md, struct dm_ioctl *param)
 
 		table = dm_get_inactive_table(md, &srcu_idx);
 		if (table) {
-			if (!(dm_table_get_mode(table) & FMODE_WRITE))
+			if (!(dm_table_get_mode(table) & BLK_OPEN_WRITE))
 				param->flags |= DM_READONLY_FLAG;
 			param->target_count = table->num_targets;
 		}
@@ -1192,7 +1192,7 @@ static int do_resume(struct dm_ioctl *param)
 		if (old_size && new_size && old_size != new_size)
 			need_resize_uevent = true;
 
-		if (dm_table_get_mode(new_map) & FMODE_WRITE)
+		if (dm_table_get_mode(new_map) & BLK_OPEN_WRITE)
 			set_disk_ro(dm_disk(md), 0);
 		else
 			set_disk_ro(dm_disk(md), 1);
@@ -1381,12 +1381,12 @@ static int dev_arm_poll(struct file *filp, struct dm_ioctl *param, size_t param_
 	return 0;
 }
 
-static inline fmode_t get_mode(struct dm_ioctl *param)
+static inline blk_mode_t get_mode(struct dm_ioctl *param)
 {
-	fmode_t mode = FMODE_READ | FMODE_WRITE;
+	blk_mode_t mode = BLK_OPEN_READ | BLK_OPEN_WRITE;
 
 	if (param->flags & DM_READONLY_FLAG)
-		mode = FMODE_READ;
+		mode = BLK_OPEN_READ;
 
 	return mode;
 }
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index 7832974b73eb03..bf7a574499a34d 100644
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -1242,7 +1242,7 @@ static int snapshot_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 	int r = -EINVAL;
 	char *origin_path, *cow_path;
 	unsigned int args_used, num_flush_bios = 1;
-	fmode_t origin_mode = FMODE_READ;
+	blk_mode_t origin_mode = BLK_OPEN_READ;
 
 	if (argc < 4) {
 		ti->error = "requires 4 or more arguments";
@@ -1252,7 +1252,7 @@ static int snapshot_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 
 	if (dm_target_is_snapshot_merge(ti)) {
 		num_flush_bios = 2;
-		origin_mode = FMODE_WRITE;
+		origin_mode = BLK_OPEN_WRITE;
 	}
 
 	s = kzalloc(sizeof(*s), GFP_KERNEL);
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 2fd5826bfce175..7d208b2b1a192d 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -126,7 +126,7 @@ static int alloc_targets(struct dm_table *t, unsigned int num)
 	return 0;
 }
 
-int dm_table_create(struct dm_table **result, fmode_t mode,
+int dm_table_create(struct dm_table **result, blk_mode_t mode,
 		    unsigned int num_targets, struct mapped_device *md)
 {
 	struct dm_table *t = kzalloc(sizeof(*t), GFP_KERNEL);
@@ -304,7 +304,7 @@ static int device_area_is_invalid(struct dm_target *ti, struct dm_dev *dev,
  * device and not to touch the existing bdev field in case
  * it is accessed concurrently.
  */
-static int upgrade_mode(struct dm_dev_internal *dd, fmode_t new_mode,
+static int upgrade_mode(struct dm_dev_internal *dd, blk_mode_t new_mode,
 			struct mapped_device *md)
 {
 	int r;
@@ -330,7 +330,7 @@ static int upgrade_mode(struct dm_dev_internal *dd, fmode_t new_mode,
  * Note: the __ref annotation is because this function can call the __init
  * marked early_lookup_bdev when called during early boot code from dm-init.c.
  */
-int __ref dm_get_device(struct dm_target *ti, const char *path, fmode_t mode,
+int __ref dm_get_device(struct dm_target *ti, const char *path, blk_mode_t mode,
 		  struct dm_dev **result)
 {
 	int r;
@@ -662,7 +662,8 @@ int dm_table_add_target(struct dm_table *t, const char *type,
 		t->singleton = true;
 	}
 
-	if (dm_target_always_writeable(ti->type) && !(t->mode & FMODE_WRITE)) {
+	if (dm_target_always_writeable(ti->type) &&
+	    !(t->mode & BLK_OPEN_WRITE)) {
 		ti->error = "target type may not be included in a read-only table";
 		goto bad;
 	}
@@ -2033,7 +2034,7 @@ struct list_head *dm_table_get_devices(struct dm_table *t)
 	return &t->devices;
 }
 
-fmode_t dm_table_get_mode(struct dm_table *t)
+blk_mode_t dm_table_get_mode(struct dm_table *t)
 {
 	return t->mode;
 }
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index 2b13c949bd726b..464c6b67841719 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -3301,7 +3301,7 @@ static int pool_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 	unsigned long block_size;
 	dm_block_t low_water_blocks;
 	struct dm_dev *metadata_dev;
-	fmode_t metadata_mode;
+	blk_mode_t metadata_mode;
 
 	/*
 	 * FIXME Remove validation from scope of lock.
@@ -3334,7 +3334,8 @@ static int pool_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 	if (r)
 		goto out_unlock;
 
-	metadata_mode = FMODE_READ | ((pf.mode == PM_READ_ONLY) ? 0 : FMODE_WRITE);
+	metadata_mode = BLK_OPEN_READ |
+		((pf.mode == PM_READ_ONLY) ? 0 : BLK_OPEN_WRITE);
 	r = dm_get_device(ti, argv[0], metadata_mode, &metadata_dev);
 	if (r) {
 		ti->error = "Error opening metadata block device";
@@ -3342,7 +3343,7 @@ static int pool_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 	}
 	warn_if_metadata_device_too_big(metadata_dev->bdev);
 
-	r = dm_get_device(ti, argv[1], FMODE_READ | FMODE_WRITE, &data_dev);
+	r = dm_get_device(ti, argv[1], BLK_OPEN_READ | BLK_OPEN_WRITE, &data_dev);
 	if (r) {
 		ti->error = "Error getting data device";
 		goto out_metadata;
@@ -4223,7 +4224,7 @@ static int thin_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 			goto bad_origin_dev;
 		}
 
-		r = dm_get_device(ti, argv[2], FMODE_READ, &origin_dev);
+		r = dm_get_device(ti, argv[2], BLK_OPEN_READ, &origin_dev);
 		if (r) {
 			ti->error = "Error opening origin device";
 			goto bad_origin_dev;
diff --git a/drivers/md/dm-verity-fec.c b/drivers/md/dm-verity-fec.c
index a9ee2faa75a296..3ef9f018da60ce 100644
--- a/drivers/md/dm-verity-fec.c
+++ b/drivers/md/dm-verity-fec.c
@@ -607,7 +607,7 @@ int verity_fec_parse_opt_args(struct dm_arg_set *as, struct dm_verity *v,
 	(*argc)--;
 
 	if (!strcasecmp(arg_name, DM_VERITY_OPT_FEC_DEV)) {
-		r = dm_get_device(ti, arg_value, FMODE_READ, &v->fec->dev);
+		r = dm_get_device(ti, arg_value, BLK_OPEN_READ, &v->fec->dev);
 		if (r) {
 			ti->error = "FEC device lookup failed";
 			return r;
diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c
index e35c16e06d0658..26adcfea030229 100644
--- a/drivers/md/dm-verity-target.c
+++ b/drivers/md/dm-verity-target.c
@@ -1196,7 +1196,7 @@ static int verity_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 	if (r)
 		goto bad;
 
-	if ((dm_table_get_mode(ti->table) & ~FMODE_READ)) {
+	if ((dm_table_get_mode(ti->table) & ~BLK_OPEN_READ)) {
 		ti->error = "Device must be readonly";
 		r = -EINVAL;
 		goto bad;
@@ -1225,13 +1225,13 @@ static int verity_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 	}
 	v->version = num;
 
-	r = dm_get_device(ti, argv[1], FMODE_READ, &v->data_dev);
+	r = dm_get_device(ti, argv[1], BLK_OPEN_READ, &v->data_dev);
 	if (r) {
 		ti->error = "Data device lookup failed";
 		goto bad;
 	}
 
-	r = dm_get_device(ti, argv[2], FMODE_READ, &v->hash_dev);
+	r = dm_get_device(ti, argv[2], BLK_OPEN_READ, &v->hash_dev);
 	if (r) {
 		ti->error = "Hash device lookup failed";
 		goto bad;
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index b16e37362c5a01..ca2dc079c3f46b 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -310,7 +310,7 @@ int dm_deleting_md(struct mapped_device *md)
 	return test_bit(DMF_DELETING, &md->flags);
 }
 
-static int dm_blk_open(struct gendisk *disk, fmode_t mode)
+static int dm_blk_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct mapped_device *md;
 
@@ -448,7 +448,7 @@ static void dm_unprepare_ioctl(struct mapped_device *md, int srcu_idx)
 	dm_put_live_table(md, srcu_idx);
 }
 
-static int dm_blk_ioctl(struct block_device *bdev, fmode_t mode,
+static int dm_blk_ioctl(struct block_device *bdev, blk_mode_t mode,
 			unsigned int cmd, unsigned long arg)
 {
 	struct mapped_device *md = bdev->bd_disk->private_data;
@@ -734,7 +734,7 @@ static char *_dm_claim_ptr = "I belong to device-mapper";
  * Open a table device so we can use it as a map destination.
  */
 static struct table_device *open_table_device(struct mapped_device *md,
-		dev_t dev, fmode_t mode)
+		dev_t dev, blk_mode_t mode)
 {
 	struct table_device *td;
 	struct block_device *bdev;
@@ -791,7 +791,7 @@ static void close_table_device(struct table_device *td, struct mapped_device *md
 }
 
 static struct table_device *find_table_device(struct list_head *l, dev_t dev,
-					      fmode_t mode)
+					      blk_mode_t mode)
 {
 	struct table_device *td;
 
@@ -802,7 +802,7 @@ static struct table_device *find_table_device(struct list_head *l, dev_t dev,
 	return NULL;
 }
 
-int dm_get_table_device(struct mapped_device *md, dev_t dev, fmode_t mode,
+int dm_get_table_device(struct mapped_device *md, dev_t dev, blk_mode_t mode,
 			struct dm_dev **result)
 {
 	struct table_device *td;
diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index a856e0aee73bc9..63d9010d8e6179 100644
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -203,7 +203,7 @@ int dm_open_count(struct mapped_device *md);
 int dm_lock_for_deletion(struct mapped_device *md, bool mark_deferred, bool only_deferred);
 int dm_cancel_deferred_remove(struct mapped_device *md);
 int dm_request_based(struct mapped_device *md);
-int dm_get_table_device(struct mapped_device *md, dev_t dev, fmode_t mode,
+int dm_get_table_device(struct mapped_device *md, dev_t dev, blk_mode_t mode,
 			struct dm_dev **result);
 void dm_put_table_device(struct mapped_device *md, struct dm_dev *d);
 
diff --git a/drivers/md/md.c b/drivers/md/md.c
index dad4a5539f9f68..ca0de7ddd9434d 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3643,7 +3643,7 @@ static struct md_rdev *md_import_device(dev_t newdev, int super_format, int supe
 	if (err)
 		goto out_clear_rdev;
 
-	rdev->bdev = blkdev_get_by_dev(newdev, FMODE_READ | FMODE_WRITE,
+	rdev->bdev = blkdev_get_by_dev(newdev, BLK_OPEN_READ | BLK_OPEN_WRITE,
 			super_format == -2 ? &claim_rdev : rdev, NULL);
 	if (IS_ERR(rdev->bdev)) {
 		pr_warn("md: could not open device unknown-block(%u,%u).\n",
@@ -7488,7 +7488,7 @@ static int __md_set_array_info(struct mddev *mddev, void __user *argp)
 	return err;
 }
 
-static int md_ioctl(struct block_device *bdev, fmode_t mode,
+static int md_ioctl(struct block_device *bdev, blk_mode_t mode,
 			unsigned int cmd, unsigned long arg)
 {
 	int err = 0;
@@ -7720,7 +7720,7 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
 	return err;
 }
 #ifdef CONFIG_COMPAT
-static int md_compat_ioctl(struct block_device *bdev, fmode_t mode,
+static int md_compat_ioctl(struct block_device *bdev, blk_mode_t mode,
 		    unsigned int cmd, unsigned long arg)
 {
 	switch (cmd) {
@@ -7769,7 +7769,7 @@ static int md_set_read_only(struct block_device *bdev, bool ro)
 	return err;
 }
 
-static int md_open(struct gendisk *disk, fmode_t mode)
+static int md_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct mddev *mddev;
 	int err;
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index b16eedf22d4e26..2a33b5073cc454 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -357,7 +357,7 @@ static const struct attribute_group *mmc_disk_attr_groups[] = {
 	NULL,
 };
 
-static int mmc_blk_open(struct gendisk *disk, fmode_t mode)
+static int mmc_blk_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct mmc_blk_data *md = mmc_blk_get(disk);
 	int ret = -ENXIO;
@@ -365,7 +365,7 @@ static int mmc_blk_open(struct gendisk *disk, fmode_t mode)
 	mutex_lock(&block_mutex);
 	if (md) {
 		ret = 0;
-		if ((mode & FMODE_WRITE) && md->read_only) {
+		if ((mode & BLK_OPEN_WRITE) && md->read_only) {
 			mmc_blk_put(md);
 			ret = -EROFS;
 		}
@@ -754,7 +754,7 @@ static int mmc_blk_check_blkdev(struct block_device *bdev)
 	return 0;
 }
 
-static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
+static int mmc_blk_ioctl(struct block_device *bdev, blk_mode_t mode,
 	unsigned int cmd, unsigned long arg)
 {
 	struct mmc_blk_data *md;
@@ -791,7 +791,7 @@ static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
 }
 
 #ifdef CONFIG_COMPAT
-static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
+static int mmc_blk_compat_ioctl(struct block_device *bdev, blk_mode_t mode,
 	unsigned int cmd, unsigned long arg)
 {
 	return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
diff --git a/drivers/mtd/devices/block2mtd.c b/drivers/mtd/devices/block2mtd.c
index 44fc23af4c3f84..be106dc20ff3cf 100644
--- a/drivers/mtd/devices/block2mtd.c
+++ b/drivers/mtd/devices/block2mtd.c
@@ -220,7 +220,7 @@ static void block2mtd_free_device(struct block2mtd_dev *dev)
  * early_lookup_bdev when called from the early boot code.
  */
 static struct block_device __ref *mdtblock_early_get_bdev(const char *devname,
-		fmode_t mode, int timeout, struct block2mtd_dev *dev)
+		blk_mode_t mode, int timeout, struct block2mtd_dev *dev)
 {
 	struct block_device *bdev = ERR_PTR(-ENODEV);
 #ifndef MODULE
@@ -261,7 +261,7 @@ static struct block_device __ref *mdtblock_early_get_bdev(const char *devname,
 static struct block2mtd_dev *add_device(char *devname, int erase_size,
 		char *label, int timeout)
 {
-	const fmode_t mode = FMODE_READ | FMODE_WRITE;
+	const blk_mode_t mode = BLK_OPEN_READ | BLK_OPEN_WRITE;
 	struct block_device *bdev;
 	struct block2mtd_dev *dev;
 	char *name;
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index bd0b7545364349..ff18636e088973 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -182,7 +182,7 @@ static blk_status_t mtd_queue_rq(struct blk_mq_hw_ctx *hctx,
 	return BLK_STS_OK;
 }
 
-static int blktrans_open(struct gendisk *disk, fmode_t mode)
+static int blktrans_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct mtd_blktrans_dev *dev = disk->private_data;
 	int ret = 0;
@@ -208,7 +208,7 @@ static int blktrans_open(struct gendisk *disk, fmode_t mode)
 	ret = __get_mtd_device(dev->mtd);
 	if (ret)
 		goto error_release;
-	dev->writable = mode & FMODE_WRITE;
+	dev->writable = mode & BLK_OPEN_WRITE;
 
 unlock:
 	dev->open++;
diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c
index e85fb9de0b7004..437c5b83ffe513 100644
--- a/drivers/mtd/ubi/block.c
+++ b/drivers/mtd/ubi/block.c
@@ -227,7 +227,7 @@ static blk_status_t ubiblock_read(struct request *req)
 	return BLK_STS_OK;
 }
 
-static int ubiblock_open(struct gendisk *disk, fmode_t mode)
+static int ubiblock_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct ubiblock *dev = disk->private_data;
 	int ret;
@@ -246,11 +246,10 @@ static int ubiblock_open(struct gendisk *disk, fmode_t mode)
 	 * It's just a paranoid check, as write requests will get rejected
 	 * in any case.
 	 */
-	if (mode & FMODE_WRITE) {
+	if (mode & BLK_OPEN_WRITE) {
 		ret = -EROFS;
 		goto out_unlock;
 	}
-
 	dev->desc = ubi_open_volume(dev->ubi_num, dev->vol_id, UBI_READONLY);
 	if (IS_ERR(dev->desc)) {
 		dev_err(disk_to_dev(dev->gd), "failed to open ubi volume %d_%d",
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index fd7f8e6d66fda6..c3d72fc677f7ec 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1591,7 +1591,7 @@ static void nvme_ns_release(struct nvme_ns *ns)
 	nvme_put_ns(ns);
 }
 
-static int nvme_open(struct gendisk *disk, fmode_t mode)
+static int nvme_open(struct gendisk *disk, blk_mode_t mode)
 {
 	return nvme_ns_open(disk->private_data);
 }
diff --git a/drivers/nvme/host/ioctl.c b/drivers/nvme/host/ioctl.c
index 8bf09047348ee9..0fd0aa571cc939 100644
--- a/drivers/nvme/host/ioctl.c
+++ b/drivers/nvme/host/ioctl.c
@@ -709,11 +709,11 @@ static int nvme_ns_ioctl(struct nvme_ns *ns, unsigned int cmd,
 	}
 }
 
-int nvme_ioctl(struct block_device *bdev, fmode_t mode,
+int nvme_ioctl(struct block_device *bdev, blk_mode_t mode,
 		unsigned int cmd, unsigned long arg)
 {
 	struct nvme_ns *ns = bdev->bd_disk->private_data;
-	bool open_for_write = mode & FMODE_WRITE;
+	bool open_for_write = mode & BLK_OPEN_WRITE;
 	void __user *argp = (void __user *)arg;
 	unsigned int flags = 0;
 
@@ -817,11 +817,11 @@ static int nvme_ns_head_ctrl_ioctl(struct nvme_ns *ns, unsigned int cmd,
 	return ret;
 }
 
-int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode,
+int nvme_ns_head_ioctl(struct block_device *bdev, blk_mode_t mode,
 		unsigned int cmd, unsigned long arg)
 {
 	struct nvme_ns_head *head = bdev->bd_disk->private_data;
-	bool open_for_write = mode & FMODE_WRITE;
+	bool open_for_write = mode & BLK_OPEN_WRITE;
 	void __user *argp = (void __user *)arg;
 	struct nvme_ns *ns;
 	int srcu_idx, ret = -EWOULDBLOCK;
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 698c0e70bcfa5b..91a9a55227fa3e 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -402,7 +402,7 @@ static void nvme_ns_head_submit_bio(struct bio *bio)
 	srcu_read_unlock(&head->srcu, srcu_idx);
 }
 
-static int nvme_ns_head_open(struct gendisk *disk, fmode_t mode)
+static int nvme_ns_head_open(struct gendisk *disk, blk_mode_t mode)
 {
 	if (!nvme_tryget_ns_head(disk->private_data))
 		return -ENXIO;
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index bf46f122e9e1e4..953e59f5613920 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -836,10 +836,10 @@ void nvme_put_ns_head(struct nvme_ns_head *head);
 int nvme_cdev_add(struct cdev *cdev, struct device *cdev_device,
 		const struct file_operations *fops, struct module *owner);
 void nvme_cdev_del(struct cdev *cdev, struct device *cdev_device);
-int nvme_ioctl(struct block_device *bdev, fmode_t mode,
+int nvme_ioctl(struct block_device *bdev, blk_mode_t mode,
 		unsigned int cmd, unsigned long arg);
 long nvme_ns_chr_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
-int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode,
+int nvme_ns_head_ioctl(struct block_device *bdev, blk_mode_t mode,
 		unsigned int cmd, unsigned long arg);
 long nvme_ns_head_chr_ioctl(struct file *file, unsigned int cmd,
 		unsigned long arg);
diff --git a/drivers/nvme/target/io-cmd-bdev.c b/drivers/nvme/target/io-cmd-bdev.c
index 65ed2d478fac89..2733e01585854c 100644
--- a/drivers/nvme/target/io-cmd-bdev.c
+++ b/drivers/nvme/target/io-cmd-bdev.c
@@ -85,7 +85,7 @@ int nvmet_bdev_ns_enable(struct nvmet_ns *ns)
 		return -ENOTBLK;
 
 	ns->bdev = blkdev_get_by_path(ns->device_path,
-			FMODE_READ | FMODE_WRITE, NULL, NULL);
+			BLK_OPEN_READ | BLK_OPEN_WRITE, NULL, NULL);
 	if (IS_ERR(ns->bdev)) {
 		ret = PTR_ERR(ns->bdev);
 		if (ret != -ENOTBLK) {
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 19295b2df470c8..45788955c4e63f 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -3234,7 +3234,7 @@ struct blk_mq_ops dasd_mq_ops = {
 	.exit_hctx = dasd_exit_hctx,
 };
 
-static int dasd_open(struct gendisk *disk, fmode_t mode)
+static int dasd_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct dasd_device *base;
 	int rc;
@@ -3268,14 +3268,12 @@ static int dasd_open(struct gendisk *disk, fmode_t mode)
 		rc = -ENODEV;
 		goto out;
 	}
-
-	if ((mode & FMODE_WRITE) &&
+	if ((mode & BLK_OPEN_WRITE) &&
 	    (test_bit(DASD_FLAG_DEVICE_RO, &base->flags) ||
 	     (base->features & DASD_FEATURE_READONLY))) {
 		rc = -EROFS;
 		goto out;
 	}
-
 	dasd_put_device(base);
 	return 0;
 
diff --git a/drivers/s390/block/dasd_genhd.c b/drivers/s390/block/dasd_genhd.c
index d2b27b84f854cc..fe5108a1b332ea 100644
--- a/drivers/s390/block/dasd_genhd.c
+++ b/drivers/s390/block/dasd_genhd.c
@@ -130,7 +130,8 @@ int dasd_scan_partitions(struct dasd_block *block)
 	struct block_device *bdev;
 	int rc;
 
-	bdev = blkdev_get_by_dev(disk_devt(block->gdp), FMODE_READ, NULL, NULL);
+	bdev = blkdev_get_by_dev(disk_devt(block->gdp), BLK_OPEN_READ, NULL,
+				 NULL);
 	if (IS_ERR(bdev)) {
 		DBF_DEV_EVENT(DBF_ERR, block->base,
 			      "scan partitions error, blkdev_get returned %ld",
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index 33f812f0e51504..0aa56351da720e 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -965,7 +965,8 @@ int dasd_scan_partitions(struct dasd_block *);
 void dasd_destroy_partitions(struct dasd_block *);
 
 /* externals in dasd_ioctl.c */
-int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long);
+int dasd_ioctl(struct block_device *bdev, blk_mode_t mode, unsigned int cmd,
+		unsigned long arg);
 int dasd_set_read_only(struct block_device *bdev, bool ro);
 
 /* externals in dasd_proc.c */
diff --git a/drivers/s390/block/dasd_ioctl.c b/drivers/s390/block/dasd_ioctl.c
index 9327dcdd6e5e43..838c9f5313e60d 100644
--- a/drivers/s390/block/dasd_ioctl.c
+++ b/drivers/s390/block/dasd_ioctl.c
@@ -612,7 +612,7 @@ static int dasd_ioctl_readall_cmb(struct dasd_block *block, unsigned int cmd,
 	return ret;
 }
 
-int dasd_ioctl(struct block_device *bdev, fmode_t mode,
+int dasd_ioctl(struct block_device *bdev, blk_mode_t mode,
 	       unsigned int cmd, unsigned long arg)
 {
 	struct dasd_block *block;
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 5aee3106bfda84..200f88f0e45194 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -28,7 +28,7 @@
 #define DCSSBLK_PARM_LEN 400
 #define DCSS_BUS_ID_SIZE 20
 
-static int dcssblk_open(struct gendisk *disk, fmode_t mode);
+static int dcssblk_open(struct gendisk *disk, blk_mode_t mode);
 static void dcssblk_release(struct gendisk *disk);
 static void dcssblk_submit_bio(struct bio *bio);
 static long dcssblk_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff,
@@ -809,7 +809,7 @@ dcssblk_remove_store(struct device *dev, struct device_attribute *attr, const ch
 }
 
 static int
-dcssblk_open(struct gendisk *disk, fmode_t mode)
+dcssblk_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct dcssblk_dev_info *dev_info = disk->private_data;
 	int rc;
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 02b6704ec2b401..ab216976dbdc80 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1298,7 +1298,7 @@ static bool sd_need_revalidate(struct gendisk *disk, struct scsi_disk *sdkp)
 /**
  *	sd_open - open a scsi disk device
  *	@disk: disk to open
- *	@mode: FMODE_* mask
+ *	@mode: open mode
  *
  *	Returns 0 if successful. Returns a negated errno value in case 
  *	of error.
@@ -1310,7 +1310,7 @@ static bool sd_need_revalidate(struct gendisk *disk, struct scsi_disk *sdkp)
  *
  *	Locking: called with disk->open_mutex held.
  **/
-static int sd_open(struct gendisk *disk, fmode_t mode)
+static int sd_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct scsi_disk *sdkp = scsi_disk(disk);
 	struct scsi_device *sdev = sdkp->device;
@@ -1336,7 +1336,8 @@ static int sd_open(struct gendisk *disk, fmode_t mode)
 	 * If the drive is empty, just let the open fail.
 	 */
 	retval = -ENOMEDIUM;
-	if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY))
+	if (sdev->removable && !sdkp->media_present &&
+	    !(mode & BLK_OPEN_NDELAY))
 		goto error_out;
 
 	/*
@@ -1344,7 +1345,7 @@ static int sd_open(struct gendisk *disk, fmode_t mode)
 	 * if the user expects to be able to write to the thing.
 	 */
 	retval = -EROFS;
-	if (sdkp->write_prot && (mode & FMODE_WRITE))
+	if (sdkp->write_prot && (mode & BLK_OPEN_WRITE))
 		goto error_out;
 
 	/*
@@ -1379,7 +1380,7 @@ static int sd_open(struct gendisk *disk, fmode_t mode)
  *	Note: may block (uninterruptible) if error recovery is underway
  *	on this disk.
  *
- *	Locking: called with bdev->bd_disk->open_mutex held.
+ *	Locking: called with disk->open_mutex held.
  **/
 static void sd_release(struct gendisk *disk)
 {
@@ -1424,7 +1425,7 @@ static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 /**
  *	sd_ioctl - process an ioctl
  *	@bdev: target block device
- *	@mode: FMODE_* mask
+ *	@mode: open mode
  *	@cmd: ioctl command number
  *	@arg: this is third argument given to ioctl(2) system call.
  *	Often contains a pointer.
@@ -1435,7 +1436,7 @@ static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
  *	Note: most ioctls are forward onto the block subsystem or further
  *	down in the scsi subsystem.
  **/
-static int sd_ioctl(struct block_device *bdev, fmode_t mode,
+static int sd_ioctl(struct block_device *bdev, blk_mode_t mode,
 		    unsigned int cmd, unsigned long arg)
 {
 	struct gendisk *disk = bdev->bd_disk;
@@ -1457,13 +1458,13 @@ static int sd_ioctl(struct block_device *bdev, fmode_t mode,
 	 * access to the device is prohibited.
 	 */
 	error = scsi_ioctl_block_when_processing_errors(sdp, cmd,
-			(mode & FMODE_NDELAY) != 0);
+			(mode & BLK_OPEN_NDELAY));
 	if (error)
 		return error;
 
 	if (is_sed_ioctl(cmd))
 		return sed_ioctl(sdkp->opal_dev, cmd, p);
-	return scsi_ioctl(sdp, mode & FMODE_WRITE, cmd, p);
+	return scsi_ioctl(sdp, mode & BLK_OPEN_WRITE, cmd, p);
 }
 
 static void set_media_not_present(struct scsi_disk *sdkp)
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 00aaafc8dd78f8..ce886c8c9dbe4c 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -484,7 +484,7 @@ static void sr_revalidate_disk(struct scsi_cd *cd)
 	get_sectorsize(cd);
 }
 
-static int sr_block_open(struct gendisk *disk, fmode_t mode)
+static int sr_block_open(struct gendisk *disk, blk_mode_t mode)
 {
 	struct scsi_cd *cd = scsi_cd(disk);
 	struct scsi_device *sdev = cd->device;
@@ -518,8 +518,8 @@ static void sr_block_release(struct gendisk *disk)
 	scsi_device_put(cd->device);
 }
 
-static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
-			  unsigned long arg)
+static int sr_block_ioctl(struct block_device *bdev, blk_mode_t mode,
+		unsigned cmd, unsigned long arg)
 {
 	struct scsi_cd *cd = scsi_cd(bdev->bd_disk);
 	struct scsi_device *sdev = cd->device;
@@ -532,7 +532,7 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
 	mutex_lock(&cd->lock);
 
 	ret = scsi_ioctl_block_when_processing_errors(sdev, cmd,
-			(mode & FMODE_NDELAY) != 0);
+			(mode & BLK_OPEN_NDELAY));
 	if (ret)
 		goto out;
 
@@ -543,7 +543,7 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
 		if (ret != -ENOSYS)
 			goto put;
 	}
-	ret = scsi_ioctl(sdev, mode & FMODE_WRITE, cmd, argp);
+	ret = scsi_ioctl(sdev, mode & BLK_OPEN_WRITE, cmd, argp);
 
 put:
 	scsi_autopm_put_device(sdev);
diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index c62f961f46e378..3c462d69daca30 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -90,7 +90,7 @@ static int iblock_configure_device(struct se_device *dev)
 	struct request_queue *q;
 	struct block_device *bd = NULL;
 	struct blk_integrity *bi;
-	fmode_t mode;
+	blk_mode_t mode = BLK_OPEN_READ;
 	unsigned int max_write_zeroes_sectors;
 	int ret;
 
@@ -108,9 +108,8 @@ static int iblock_configure_device(struct se_device *dev)
 	pr_debug( "IBLOCK: Claiming struct block_device: %s\n",
 			ib_dev->ibd_udev_path);
 
-	mode = FMODE_READ;
 	if (!ib_dev->ibd_readonly)
-		mode |= FMODE_WRITE;
+		mode |= BLK_OPEN_WRITE;
 	else
 		dev->dev_flags |= DF_READ_ONLY;
 
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index da3b5512d7ae32..0d4f09693ef46e 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -366,8 +366,8 @@ static int pscsi_create_type_disk(struct se_device *dev, struct scsi_device *sd)
 	 * Claim exclusive struct block_device access to struct scsi_device
 	 * for TYPE_DISK and TYPE_ZBC using supplied udev_path
 	 */
-	bd = blkdev_get_by_path(dev->udev_path, FMODE_WRITE | FMODE_READ, pdv,
-				NULL);
+	bd = blkdev_get_by_path(dev->udev_path, BLK_OPEN_WRITE | BLK_OPEN_READ,
+				pdv, NULL);
 	if (IS_ERR(bd)) {
 		pr_err("pSCSI: blkdev_get_by_path() failed\n");
 		scsi_device_put(sd);
diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index 677e9d9e1527aa..2d00600ff41327 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -257,7 +257,7 @@ static int btrfs_init_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
 		return -EINVAL;
 	}
 
-	bdev = blkdev_get_by_path(device_path, FMODE_WRITE,
+	bdev = blkdev_get_by_path(device_path, BLK_OPEN_WRITE,
 				  fs_info->bdev_holder, NULL);
 	if (IS_ERR(bdev)) {
 		btrfs_err(fs_info, "target device %s is invalid!", device_path);
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index fd02b92e39106a..3c8c5e5a0bfc53 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -849,7 +849,7 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
  * All other options will be parsed on much later in the mount process and
  * only when we need to allocate a new super block.
  */
-static int btrfs_parse_device_options(const char *options, fmode_t flags)
+static int btrfs_parse_device_options(const char *options, blk_mode_t flags)
 {
 	substring_t args[MAX_OPT_ARGS];
 	char *device_name, *opts, *orig, *p;
@@ -1440,7 +1440,7 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type,
 	struct btrfs_fs_devices *fs_devices = NULL;
 	struct btrfs_fs_info *fs_info = NULL;
 	void *new_sec_opts = NULL;
-	fmode_t mode = sb_open_mode(flags);
+	blk_mode_t mode = sb_open_mode(flags);
 	int error = 0;
 
 	if (data) {
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 7b12e05cdbf00b..c85e54f8603564 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -490,7 +490,7 @@ static struct btrfs_fs_devices *find_fsid_with_metadata_uuid(
 
 
 static int
-btrfs_get_bdev_and_sb(const char *device_path, fmode_t flags, void *holder,
+btrfs_get_bdev_and_sb(const char *device_path, blk_mode_t flags, void *holder,
 		      int flush, struct block_device **bdev,
 		      struct btrfs_super_block **disk_super)
 {
@@ -590,7 +590,7 @@ static int btrfs_free_stale_devices(dev_t devt, struct btrfs_device *skip_device
  * fs_devices->device_list_mutex here.
  */
 static int btrfs_open_one_device(struct btrfs_fs_devices *fs_devices,
-			struct btrfs_device *device, fmode_t flags,
+			struct btrfs_device *device, blk_mode_t flags,
 			void *holder)
 {
 	struct block_device *bdev;
@@ -1207,7 +1207,7 @@ void btrfs_close_devices(struct btrfs_fs_devices *fs_devices)
 }
 
 static int open_fs_devices(struct btrfs_fs_devices *fs_devices,
-				fmode_t flags, void *holder)
+				blk_mode_t flags, void *holder)
 {
 	struct btrfs_device *device;
 	struct btrfs_device *latest_dev = NULL;
@@ -1255,7 +1255,7 @@ static int devid_cmp(void *priv, const struct list_head *a,
 }
 
 int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
-		       fmode_t flags, void *holder)
+		       blk_mode_t flags, void *holder)
 {
 	int ret;
 
@@ -1346,7 +1346,7 @@ int btrfs_forget_devices(dev_t devt)
  * and we are not allowed to call set_blocksize during the scan. The superblock
  * is read via pagecache
  */
-struct btrfs_device *btrfs_scan_one_device(const char *path, fmode_t flags)
+struct btrfs_device *btrfs_scan_one_device(const char *path, blk_mode_t flags)
 {
 	struct btrfs_super_block *disk_super;
 	bool new_device_added = false;
@@ -2378,7 +2378,7 @@ int btrfs_get_dev_args_from_path(struct btrfs_fs_info *fs_info,
 		return -ENOMEM;
 	}
 
-	ret = btrfs_get_bdev_and_sb(path, FMODE_READ, NULL, 0,
+	ret = btrfs_get_bdev_and_sb(path, BLK_OPEN_READ, NULL, 0,
 				    &bdev, &disk_super);
 	if (ret) {
 		btrfs_put_dev_args_from_path(args);
@@ -2625,7 +2625,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
 	if (sb_rdonly(sb) && !fs_devices->seeding)
 		return -EROFS;
 
-	bdev = blkdev_get_by_path(device_path, FMODE_WRITE,
+	bdev = blkdev_get_by_path(device_path, BLK_OPEN_WRITE,
 				  fs_info->bdev_holder, NULL);
 	if (IS_ERR(bdev))
 		return PTR_ERR(bdev);
@@ -6907,7 +6907,7 @@ static struct btrfs_fs_devices *open_seed_devices(struct btrfs_fs_info *fs_info,
 	if (IS_ERR(fs_devices))
 		return fs_devices;
 
-	ret = open_fs_devices(fs_devices, FMODE_READ, fs_info->bdev_holder);
+	ret = open_fs_devices(fs_devices, BLK_OPEN_READ, fs_info->bdev_holder);
 	if (ret) {
 		free_fs_devices(fs_devices);
 		return ERR_PTR(ret);
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 840a8df399072c..8227ba4d64b8b1 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -599,8 +599,8 @@ struct btrfs_block_group *btrfs_create_chunk(struct btrfs_trans_handle *trans,
 					    u64 type);
 void btrfs_mapping_tree_free(struct extent_map_tree *tree);
 int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
-		       fmode_t flags, void *holder);
-struct btrfs_device *btrfs_scan_one_device(const char *path, fmode_t flags);
+		       blk_mode_t flags, void *holder);
+struct btrfs_device *btrfs_scan_one_device(const char *path, blk_mode_t flags);
 int btrfs_forget_devices(dev_t devt);
 void btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
 void btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices);
diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index 54dba967a2d445..3f080f0afc0251 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -254,7 +254,7 @@ static int erofs_init_device(struct erofs_buf *buf, struct super_block *sb,
 			return PTR_ERR(fscache);
 		dif->fscache = fscache;
 	} else if (!sbi->devs->flatdev) {
-		bdev = blkdev_get_by_path(dif->path, FMODE_READ, sb->s_type,
+		bdev = blkdev_get_by_path(dif->path, BLK_OPEN_READ, sb->s_type,
 					  NULL);
 		if (IS_ERR(bdev))
 			return PTR_ERR(bdev);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 92dd699139a3f7..94a7b56ed876c0 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1112,7 +1112,7 @@ static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb)
 {
 	struct block_device *bdev;
 
-	bdev = blkdev_get_by_dev(dev, FMODE_READ | FMODE_WRITE, sb,
+	bdev = blkdev_get_by_dev(dev, BLK_OPEN_READ | BLK_OPEN_WRITE, sb,
 				 &ext4_holder_ops);
 	if (IS_ERR(bdev))
 		goto fail;
diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c
index 82f70d46f4e544..e855b8fde76ce1 100644
--- a/fs/jfs/jfs_logmgr.c
+++ b/fs/jfs/jfs_logmgr.c
@@ -1100,7 +1100,7 @@ int lmLogOpen(struct super_block *sb)
 	 * file systems to log may have n-to-1 relationship;
 	 */
 
-	bdev = blkdev_get_by_dev(sbi->logdev, FMODE_READ | FMODE_WRITE,
+	bdev = blkdev_get_by_dev(sbi->logdev, BLK_OPEN_READ | BLK_OPEN_WRITE,
 				 log, NULL);
 	if (IS_ERR(bdev)) {
 		rc = PTR_ERR(bdev);
diff --git a/fs/nfs/blocklayout/dev.c b/fs/nfs/blocklayout/dev.c
index 9be7f958f60e45..70f5563a8e81c7 100644
--- a/fs/nfs/blocklayout/dev.c
+++ b/fs/nfs/blocklayout/dev.c
@@ -243,7 +243,8 @@ bl_parse_simple(struct nfs_server *server, struct pnfs_block_dev *d,
 	if (!dev)
 		return -EIO;
 
-	bdev = blkdev_get_by_dev(dev, FMODE_READ | FMODE_WRITE, NULL, NULL);
+	bdev = blkdev_get_by_dev(dev, BLK_OPEN_READ | BLK_OPEN_WRITE, NULL,
+				 NULL);
 	if (IS_ERR(bdev)) {
 		printk(KERN_WARNING "pNFS: failed to open device %d:%d (%ld)\n",
 			MAJOR(dev), MINOR(dev), PTR_ERR(bdev));
@@ -312,7 +313,7 @@ bl_open_path(struct pnfs_block_volume *v, const char *prefix)
 	if (!devname)
 		return ERR_PTR(-ENOMEM);
 
-	bdev = blkdev_get_by_path(devname, FMODE_READ | FMODE_WRITE, NULL,
+	bdev = blkdev_get_by_path(devname, BLK_OPEN_READ | BLK_OPEN_WRITE, NULL,
 				  NULL);
 	if (IS_ERR(bdev)) {
 		pr_warn("pNFS: failed to open device %s (%ld)\n",
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index c6ae9aee01edb9..21472e3ed182aa 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -1786,7 +1786,8 @@ static ssize_t o2hb_region_dev_store(struct config_item *item,
 		goto out2;
 
 	reg->hr_bdev = blkdev_get_by_dev(f.file->f_mapping->host->i_rdev,
-					 FMODE_WRITE | FMODE_READ, NULL, NULL);
+					 BLK_OPEN_WRITE | BLK_OPEN_READ, NULL,
+					 NULL);
 	if (IS_ERR(reg->hr_bdev)) {
 		ret = PTR_ERR(reg->hr_bdev);
 		reg->hr_bdev = NULL;
diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
index 905297ea55458d..62beee3c62b610 100644
--- a/fs/reiserfs/journal.c
+++ b/fs/reiserfs/journal.c
@@ -2598,7 +2598,7 @@ static int journal_init_dev(struct super_block *super,
 			    struct reiserfs_journal *journal,
 			    const char *jdev_name)
 {
-	fmode_t blkdev_mode = FMODE_READ;
+	blk_mode_t blkdev_mode = BLK_OPEN_READ;
 	void *holder = journal;
 	int result;
 	dev_t jdev;
@@ -2610,7 +2610,7 @@ static int journal_init_dev(struct super_block *super,
 	    new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev;
 
 	if (!bdev_read_only(super->s_bdev))
-		blkdev_mode |= FMODE_WRITE;
+		blkdev_mode |= BLK_OPEN_WRITE;
 
 	/* there is no "jdev" option and journal is on separate device */
 	if ((!jdev_name || !jdev_name[0])) {
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 3b7cf8268057fe..67ad1c93763769 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -396,7 +396,7 @@ xfs_blkdev_get(
 {
 	int			error = 0;
 
-	*bdevp = blkdev_get_by_path(name, FMODE_READ | FMODE_WRITE, mp,
+	*bdevp = blkdev_get_by_path(name, BLK_OPEN_READ | BLK_OPEN_WRITE, mp,
 				    &xfs_holder_ops);
 	if (IS_ERR(*bdevp)) {
 		error = PTR_ERR(*bdevp);
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 6b65623e447c02..824e31dd752acb 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -112,6 +112,19 @@ struct blk_integrity {
 	unsigned char				tag_size;
 };
 
+typedef unsigned int __bitwise blk_mode_t;
+
+/* open for reading */
+#define BLK_OPEN_READ		((__force blk_mode_t)(1 << 0))
+/* open for writing */
+#define BLK_OPEN_WRITE		((__force blk_mode_t)(1 << 1))
+/* open exclusively (vs other exclusive openers */
+#define BLK_OPEN_EXCL		((__force blk_mode_t)(1 << 2))
+/* opened with O_NDELAY */
+#define BLK_OPEN_NDELAY		((__force blk_mode_t)(1 << 3))
+/* open for "writes" only for ioctls (specialy hack for floppy.c) */
+#define BLK_OPEN_WRITE_IOCTL	((__force blk_mode_t)(1 << 4))
+
 struct gendisk {
 	/*
 	 * major/first_minor/minors should not be set by any new driver, the
@@ -187,6 +200,7 @@ struct gendisk {
 	struct badblocks *bb;
 	struct lockdep_map lockdep_map;
 	u64 diskseq;
+	blk_mode_t open_mode;
 
 	/*
 	 * Independent sector access ranges. This is always NULL for
@@ -1363,10 +1377,12 @@ struct block_device_operations {
 	void (*submit_bio)(struct bio *bio);
 	int (*poll_bio)(struct bio *bio, struct io_comp_batch *iob,
 			unsigned int flags);
-	int (*open)(struct gendisk *disk, fmode_t mode);
+	int (*open)(struct gendisk *disk, blk_mode_t mode);
 	void (*release)(struct gendisk *disk);
-	int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
-	int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
+	int (*ioctl)(struct block_device *bdev, blk_mode_t mode,
+			unsigned cmd, unsigned long arg);
+	int (*compat_ioctl)(struct block_device *bdev, blk_mode_t mode,
+			unsigned cmd, unsigned long arg);
 	unsigned int (*check_events) (struct gendisk *disk,
 				      unsigned int clearing);
 	void (*unlock_native_capacity) (struct gendisk *);
@@ -1393,7 +1409,7 @@ struct block_device_operations {
 };
 
 #ifdef CONFIG_COMPAT
-extern int blkdev_compat_ptr_ioctl(struct block_device *, fmode_t,
+extern int blkdev_compat_ptr_ioctl(struct block_device *, blk_mode_t,
 				      unsigned int, unsigned long);
 #else
 #define blkdev_compat_ptr_ioctl NULL
@@ -1455,11 +1471,11 @@ struct blk_holder_ops {
  * as stored in sb->s_flags.
  */
 #define sb_open_mode(flags) \
-	(FMODE_READ | (((flags) & SB_RDONLY) ? 0 : FMODE_WRITE))
+	(BLK_OPEN_READ | (((flags) & SB_RDONLY) ? 0 : BLK_OPEN_WRITE))
 
-struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
+struct block_device *blkdev_get_by_dev(dev_t dev, blk_mode_t mode, void *holder,
 		const struct blk_holder_ops *hops);
-struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
+struct block_device *blkdev_get_by_path(const char *path, blk_mode_t mode,
 		void *holder, const struct blk_holder_ops *hops);
 int bd_prepare_to_claim(struct block_device *bdev, void *holder,
 		const struct blk_holder_ops *hops);
diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h
index 3f23d5239de254..1df724a90f60da 100644
--- a/include/linux/cdrom.h
+++ b/include/linux/cdrom.h
@@ -13,6 +13,7 @@
 
 #include <linux/fs.h>		/* not really needed, later.. */
 #include <linux/list.h>
+#include <linux/blkdev.h>
 #include <scsi/scsi_common.h>
 #include <uapi/linux/cdrom.h>
 
@@ -101,7 +102,7 @@ int cdrom_read_tocentry(struct cdrom_device_info *cdi,
 		struct cdrom_tocentry *entry);
 
 /* the general block_device operations structure: */
-int cdrom_open(struct cdrom_device_info *cdi, fmode_t mode);
+int cdrom_open(struct cdrom_device_info *cdi, blk_mode_t mode);
 void cdrom_release(struct cdrom_device_info *cdi);
 int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
 		unsigned int cmd, unsigned long arg);
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index c27b84002d8382..69d0435c7ebb0d 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -166,7 +166,7 @@ void dm_error(const char *message);
 struct dm_dev {
 	struct block_device *bdev;
 	struct dax_device *dax_dev;
-	fmode_t mode;
+	blk_mode_t mode;
 	char name[16];
 };
 
@@ -174,7 +174,7 @@ struct dm_dev {
  * Constructors should call these functions to ensure destination devices
  * are opened/closed correctly.
  */
-int dm_get_device(struct dm_target *ti, const char *path, fmode_t mode,
+int dm_get_device(struct dm_target *ti, const char *path, blk_mode_t mode,
 		  struct dm_dev **result);
 void dm_put_device(struct dm_target *ti, struct dm_dev *d);
 
@@ -543,7 +543,7 @@ int dm_set_geometry(struct mapped_device *md, struct hd_geometry *geo);
 /*
  * First create an empty table.
  */
-int dm_table_create(struct dm_table **result, fmode_t mode,
+int dm_table_create(struct dm_table **result, blk_mode_t mode,
 		    unsigned int num_targets, struct mapped_device *md);
 
 /*
@@ -586,7 +586,7 @@ void dm_sync_table(struct mapped_device *md);
  * Queries
  */
 sector_t dm_table_get_size(struct dm_table *t);
-fmode_t dm_table_get_mode(struct dm_table *t);
+blk_mode_t dm_table_get_mode(struct dm_table *t);
 struct mapped_device *dm_table_get_md(struct dm_table *t);
 const char *dm_table_device_name(struct dm_table *t);
 
diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index cc9259307c942a..f6ebcd00c4100b 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -356,8 +356,8 @@ static int swsusp_swap_check(void)
 		return res;
 	root_swap = res;
 
-	hib_resume_bdev = blkdev_get_by_dev(swsusp_resume_device, FMODE_WRITE,
-			NULL, NULL);
+	hib_resume_bdev = blkdev_get_by_dev(swsusp_resume_device,
+			BLK_OPEN_WRITE, NULL, NULL);
 	if (IS_ERR(hib_resume_bdev))
 		return PTR_ERR(hib_resume_bdev);
 
@@ -1521,7 +1521,7 @@ int swsusp_check(bool snapshot_test)
 	void *holder = snapshot_test ? &swsusp_holder : NULL;
 	int error;
 
-	hib_resume_bdev = blkdev_get_by_dev(swsusp_resume_device, FMODE_READ,
+	hib_resume_bdev = blkdev_get_by_dev(swsusp_resume_device, BLK_OPEN_READ,
 					    holder, NULL);
 	if (!IS_ERR(hib_resume_bdev)) {
 		set_blocksize(hib_resume_bdev, PAGE_SIZE);
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 16554256be6554..6bc83060df9a12 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -2770,7 +2770,7 @@ static int claim_swapfile(struct swap_info_struct *p, struct inode *inode)
 
 	if (S_ISBLK(inode->i_mode)) {
 		p->bdev = blkdev_get_by_dev(inode->i_rdev,
-				   FMODE_READ | FMODE_WRITE, p, NULL);
+				BLK_OPEN_READ | BLK_OPEN_WRITE, p, NULL);
 		if (IS_ERR(p->bdev)) {
 			error = PTR_ERR(p->bdev);
 			p->bdev = NULL;
-- 
2.39.2

Re: [PATCH 28/31] block: replace fmode_t with a block-specific type for block open flags

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:47AM +0200, Christoph Hellwig wrote:
> The only overlap between the block open flags mapped into the fmode_t and
> other uses of fmode_t are FMODE_READ and FMODE_WRITE.  Define a new

and FMODE_EXCL afaict

> blk_mode_t instead for use in blkdev_get_by_*, ->open and ->ioctl and
> stop abusing fmode_t.
> 
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
> ---
>  arch/um/drivers/ubd_kern.c          |  8 +++---
>  arch/xtensa/platforms/iss/simdisk.c |  2 +-
>  block/bdev.c                        | 32 +++++++++++-----------
>  block/blk-zoned.c                   |  8 +++---
>  block/blk.h                         | 11 ++++----
>  block/fops.c                        | 26 +++++++++++++-----
>  block/genhd.c                       |  8 +++---
>  block/ioctl.c                       | 42 +++++++++--------------------
>  drivers/block/amiflop.c             | 12 ++++-----
>  drivers/block/aoe/aoeblk.c          |  4 +--
>  drivers/block/ataflop.c             | 25 +++++++++--------
>  drivers/block/drbd/drbd_main.c      |  7 ++---
>  drivers/block/drbd/drbd_nl.c        |  2 +-
>  drivers/block/floppy.c              | 28 +++++++++----------
>  drivers/block/loop.c                | 22 +++++++--------
>  drivers/block/mtip32xx/mtip32xx.c   |  4 +--
>  drivers/block/nbd.c                 |  4 +--
>  drivers/block/pktcdvd.c             | 17 ++++++------
>  drivers/block/rbd.c                 |  2 +-
>  drivers/block/rnbd/rnbd-clt.c       |  4 +--
>  drivers/block/rnbd/rnbd-srv.c       |  4 +--
>  drivers/block/sunvdc.c              |  2 +-
>  drivers/block/swim.c                | 16 +++++------
>  drivers/block/swim3.c               | 24 ++++++++---------
>  drivers/block/ublk_drv.c            |  2 +-
>  drivers/block/xen-blkback/xenbus.c  |  2 +-
>  drivers/block/xen-blkfront.c        |  2 +-
>  drivers/block/z2ram.c               |  2 +-
>  drivers/block/zram/zram_drv.c       |  6 ++---
>  drivers/cdrom/cdrom.c               |  4 +--
>  drivers/cdrom/gdrom.c               |  4 +--
>  drivers/md/bcache/bcache.h          |  2 +-
>  drivers/md/bcache/request.c         |  4 +--
>  drivers/md/bcache/super.c           |  6 ++---
>  drivers/md/dm-cache-target.c        | 12 ++++-----
>  drivers/md/dm-clone-target.c        | 10 +++----
>  drivers/md/dm-core.h                |  7 +++--
>  drivers/md/dm-era-target.c          |  6 +++--
>  drivers/md/dm-ioctl.c               | 10 +++----
>  drivers/md/dm-snap.c                |  4 +--
>  drivers/md/dm-table.c               | 11 ++++----
>  drivers/md/dm-thin.c                |  9 ++++---
>  drivers/md/dm-verity-fec.c          |  2 +-
>  drivers/md/dm-verity-target.c       |  6 ++---
>  drivers/md/dm.c                     | 10 +++----
>  drivers/md/dm.h                     |  2 +-
>  drivers/md/md.c                     |  8 +++---
>  drivers/mmc/core/block.c            |  8 +++---
>  drivers/mtd/devices/block2mtd.c     |  4 +--
>  drivers/mtd/mtd_blkdevs.c           |  4 +--
>  drivers/mtd/ubi/block.c             |  5 ++--
>  drivers/nvme/host/core.c            |  2 +-
>  drivers/nvme/host/ioctl.c           |  8 +++---
>  drivers/nvme/host/multipath.c       |  2 +-
>  drivers/nvme/host/nvme.h            |  4 +--
>  drivers/nvme/target/io-cmd-bdev.c   |  2 +-
>  drivers/s390/block/dasd.c           |  6 ++---
>  drivers/s390/block/dasd_genhd.c     |  3 ++-
>  drivers/s390/block/dasd_int.h       |  3 ++-
>  drivers/s390/block/dasd_ioctl.c     |  2 +-
>  drivers/s390/block/dcssblk.c        |  4 +--
>  drivers/scsi/sd.c                   | 19 ++++++-------
>  drivers/scsi/sr.c                   | 10 +++----
>  drivers/target/target_core_iblock.c |  5 ++--
>  drivers/target/target_core_pscsi.c  |  4 +--
>  fs/btrfs/dev-replace.c              |  2 +-
>  fs/btrfs/super.c                    |  4 +--
>  fs/btrfs/volumes.c                  | 16 +++++------
>  fs/btrfs/volumes.h                  |  4 +--
>  fs/erofs/super.c                    |  2 +-
>  fs/ext4/super.c                     |  2 +-
>  fs/jfs/jfs_logmgr.c                 |  2 +-
>  fs/nfs/blocklayout/dev.c            |  5 ++--
>  fs/ocfs2/cluster/heartbeat.c        |  3 ++-
>  fs/reiserfs/journal.c               |  4 +--
>  fs/xfs/xfs_super.c                  |  2 +-
>  include/linux/blkdev.h              | 30 ++++++++++++++++-----
>  include/linux/cdrom.h               |  3 ++-
>  include/linux/device-mapper.h       |  8 +++---
>  kernel/power/swap.c                 |  6 ++---
>  mm/swapfile.c                       |  2 +-
>  81 files changed, 324 insertions(+), 311 deletions(-)
> 
> diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
> index 20c1a16199c503..50206feac577d5 100644
> --- a/arch/um/drivers/ubd_kern.c
> +++ b/arch/um/drivers/ubd_kern.c
> @@ -108,9 +108,9 @@ static inline void ubd_set_bit(__u64 bit, unsigned char *data)
>  static DEFINE_MUTEX(ubd_lock);
>  static DEFINE_MUTEX(ubd_mutex); /* replaces BKL, might not be needed */
>  
> -static int ubd_open(struct gendisk *disk, fmode_t mode);
> +static int ubd_open(struct gendisk *disk, blk_mode_t mode);
>  static void ubd_release(struct gendisk *disk);
> -static int ubd_ioctl(struct block_device *bdev, fmode_t mode,
> +static int ubd_ioctl(struct block_device *bdev, blk_mode_t mode,
>  		     unsigned int cmd, unsigned long arg);
>  static int ubd_getgeo(struct block_device *bdev, struct hd_geometry *geo);
>  
> @@ -1154,7 +1154,7 @@ static int __init ubd_driver_init(void){
>  
>  device_initcall(ubd_driver_init);
>  
> -static int ubd_open(struct gendisk *disk, fmode_t mode)
> +static int ubd_open(struct gendisk *disk, blk_mode_t mode)
>  {
>  	struct ubd *ubd_dev = disk->private_data;
>  	int err = 0;
> @@ -1389,7 +1389,7 @@ static int ubd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
>  	return 0;
>  }
>  
> -static int ubd_ioctl(struct block_device *bdev, fmode_t mode,
> +static int ubd_ioctl(struct block_device *bdev, blk_mode_t mode,
>  		     unsigned int cmd, unsigned long arg)
>  {
>  	struct ubd *ubd_dev = bdev->bd_disk->private_data;
> diff --git a/arch/xtensa/platforms/iss/simdisk.c b/arch/xtensa/platforms/iss/simdisk.c
> index 2ad9da3de0d90f..178cf96ca10acb 100644
> --- a/arch/xtensa/platforms/iss/simdisk.c
> +++ b/arch/xtensa/platforms/iss/simdisk.c
> @@ -120,7 +120,7 @@ static void simdisk_submit_bio(struct bio *bio)
>  	bio_endio(bio);
>  }
>  
> -static int simdisk_open(struct gendisk *disk, fmode_t mode)
> +static int simdisk_open(struct gendisk *disk, blk_mode_t mode)
>  {
>  	struct simdisk *dev = disk->private_data;
>  
> diff --git a/block/bdev.c b/block/bdev.c
> index db63e5bcc46ffa..bd558a9ba3cd97 100644
> --- a/block/bdev.c
> +++ b/block/bdev.c
> @@ -93,7 +93,7 @@ EXPORT_SYMBOL(invalidate_bdev);
>   * Drop all buffers & page cache for given bdev range. This function bails
>   * with error if bdev has other exclusive owner (such as filesystem).
>   */
> -int truncate_bdev_range(struct block_device *bdev, fmode_t mode,
> +int truncate_bdev_range(struct block_device *bdev, blk_mode_t mode,
>  			loff_t lstart, loff_t lend)
>  {
>  	/*
> @@ -101,14 +101,14 @@ int truncate_bdev_range(struct block_device *bdev, fmode_t mode,
>  	 * while we discard the buffer cache to avoid discarding buffers
>  	 * under live filesystem.
>  	 */
> -	if (!(mode & FMODE_EXCL)) {
> +	if (!(mode & BLK_OPEN_EXCL)) {
>  		int err = bd_prepare_to_claim(bdev, truncate_bdev_range, NULL);
>  		if (err)
>  			goto invalidate;
>  	}
>  
>  	truncate_inode_pages_range(bdev->bd_inode->i_mapping, lstart, lend);
> -	if (!(mode & FMODE_EXCL))
> +	if (!(mode & BLK_OPEN_EXCL))
>  		bd_abort_claiming(bdev, truncate_bdev_range);
>  	return 0;
>  
> @@ -647,7 +647,7 @@ static void blkdev_flush_mapping(struct block_device *bdev)
>  	bdev_write_inode(bdev);
>  }
>  
> -static int blkdev_get_whole(struct block_device *bdev, fmode_t mode)
> +static int blkdev_get_whole(struct block_device *bdev, blk_mode_t mode)
>  {
>  	struct gendisk *disk = bdev->bd_disk;
>  	int ret;
> @@ -679,7 +679,7 @@ static void blkdev_put_whole(struct block_device *bdev)
>  		bdev->bd_disk->fops->release(bdev->bd_disk);
>  }
>  
> -static int blkdev_get_part(struct block_device *part, fmode_t mode)
> +static int blkdev_get_part(struct block_device *part, blk_mode_t mode)
>  {
>  	struct gendisk *disk = part->bd_disk;
>  	int ret;
> @@ -743,11 +743,11 @@ void blkdev_put_no_open(struct block_device *bdev)
>  {
>  	put_device(&bdev->bd_device);
>  }
> -
> +	

nit: This is whitespace damage, I think. There's a trailing tab.

>  /**
>   * blkdev_get_by_dev - open a block device by device number
>   * @dev: device number of block device to open
> - * @mode: FMODE_* mask
> + * @mode: open mode (BLK_OPEN_*)
>   * @holder: exclusive holder identifier
>   * @hops: holder operations
>   *
> @@ -765,7 +765,7 @@ void blkdev_put_no_open(struct block_device *bdev)
>   * RETURNS:
>   * Reference to the block_device on success, ERR_PTR(-errno) on failure.
>   */
> -struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
> +struct block_device *blkdev_get_by_dev(dev_t dev, blk_mode_t mode, void *holder,
>  		const struct blk_holder_ops *hops)
>  {
>  	bool unblock_events = true;
> @@ -775,8 +775,8 @@ struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
>  
>  	ret = devcgroup_check_permission(DEVCG_DEV_BLOCK,
>  			MAJOR(dev), MINOR(dev),
> -			((mode & FMODE_READ) ? DEVCG_ACC_READ : 0) |
> -			((mode & FMODE_WRITE) ? DEVCG_ACC_WRITE : 0));
> +			((mode & BLK_OPEN_READ) ? DEVCG_ACC_READ : 0) |
> +			((mode & BLK_OPEN_WRITE) ? DEVCG_ACC_WRITE : 0));
>  	if (ret)
>  		return ERR_PTR(ret);
>  
> @@ -786,12 +786,12 @@ struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
>  	disk = bdev->bd_disk;
>  
>  	if (holder) {
> -		mode |= FMODE_EXCL;
> +		mode |= BLK_OPEN_EXCL;
>  		ret = bd_prepare_to_claim(bdev, holder, hops);
>  		if (ret)
>  			goto put_blkdev;
>  	} else {
> -		if (WARN_ON_ONCE(mode & FMODE_EXCL)) {
> +		if (WARN_ON_ONCE(mode & BLK_OPEN_EXCL)) {
>  			ret = -EIO;
>  			goto put_blkdev;
>  		}
> @@ -821,7 +821,7 @@ struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
>  		 * writeable reference is too fragile given the way @mode is
>  		 * used in blkdev_get/put().
>  		 */
> -		if ((mode & FMODE_WRITE) && !bdev->bd_write_holder &&
> +		if ((mode & BLK_OPEN_WRITE) && !bdev->bd_write_holder &&
>  		    (disk->event_flags & DISK_EVENT_FLAG_BLOCK_ON_EXCL_WRITE)) {
>  			bdev->bd_write_holder = true;
>  			unblock_events = false;
> @@ -848,7 +848,7 @@ EXPORT_SYMBOL(blkdev_get_by_dev);
>  /**
>   * blkdev_get_by_path - open a block device by name
>   * @path: path to the block device to open
> - * @mode: FMODE_* mask
> + * @mode: open mode (BLK_OPEN_*)
>   * @holder: exclusive holder identifier
>   *
>   * Open the block device described by the device file at @path.  If @holder is
> @@ -861,7 +861,7 @@ EXPORT_SYMBOL(blkdev_get_by_dev);
>   * RETURNS:
>   * Reference to the block_device on success, ERR_PTR(-errno) on failure.
>   */
> -struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
> +struct block_device *blkdev_get_by_path(const char *path, blk_mode_t mode,
>  		void *holder, const struct blk_holder_ops *hops)
>  {
>  	struct block_device *bdev;
> @@ -873,7 +873,7 @@ struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
>  		return ERR_PTR(error);
>  
>  	bdev = blkdev_get_by_dev(dev, mode, holder, hops);
> -	if (!IS_ERR(bdev) && (mode & FMODE_WRITE) && bdev_read_only(bdev)) {
> +	if (!IS_ERR(bdev) && (mode & BLK_OPEN_WRITE) && bdev_read_only(bdev)) {
>  		blkdev_put(bdev, holder);
>  		return ERR_PTR(-EACCES);
>  	}
> diff --git a/block/blk-zoned.c b/block/blk-zoned.c
> index 02cc2c629ac9be..0f9f97cdddd99c 100644
> --- a/block/blk-zoned.c
> +++ b/block/blk-zoned.c
> @@ -356,8 +356,8 @@ int blkdev_report_zones_ioctl(struct block_device *bdev, unsigned int cmd,
>  	return 0;
>  }
>  
> -static int blkdev_truncate_zone_range(struct block_device *bdev, fmode_t mode,
> -				      const struct blk_zone_range *zrange)
> +static int blkdev_truncate_zone_range(struct block_device *bdev,
> +		blk_mode_t mode, const struct blk_zone_range *zrange)
>  {
>  	loff_t start, end;
>  
> @@ -376,7 +376,7 @@ static int blkdev_truncate_zone_range(struct block_device *bdev, fmode_t mode,
>   * BLKRESETZONE, BLKOPENZONE, BLKCLOSEZONE and BLKFINISHZONE ioctl processing.
>   * Called from blkdev_ioctl.
>   */
> -int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
> +int blkdev_zone_mgmt_ioctl(struct block_device *bdev, blk_mode_t mode,
>  			   unsigned int cmd, unsigned long arg)
>  {
>  	void __user *argp = (void __user *)arg;
> @@ -390,7 +390,7 @@ int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
>  	if (!bdev_is_zoned(bdev))
>  		return -ENOTTY;
>  
> -	if (!(mode & FMODE_WRITE))
> +	if (!(mode & BLK_OPEN_WRITE))
>  		return -EBADF;
>  
>  	if (copy_from_user(&zrange, argp, sizeof(struct blk_zone_range)))
> diff --git a/block/blk.h b/block/blk.h
> index e28d5d67d31a28..768852a84fefb3 100644
> --- a/block/blk.h
> +++ b/block/blk.h
> @@ -396,7 +396,7 @@ void disk_free_zone_bitmaps(struct gendisk *disk);
>  void disk_clear_zone_settings(struct gendisk *disk);
>  int blkdev_report_zones_ioctl(struct block_device *bdev, unsigned int cmd,
>  		unsigned long arg);
> -int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
> +int blkdev_zone_mgmt_ioctl(struct block_device *bdev, blk_mode_t mode,
>  		unsigned int cmd, unsigned long arg);
>  #else /* CONFIG_BLK_DEV_ZONED */
>  static inline void disk_free_zone_bitmaps(struct gendisk *disk) {}
> @@ -407,7 +407,7 @@ static inline int blkdev_report_zones_ioctl(struct block_device *bdev,
>  	return -ENOTTY;
>  }
>  static inline int blkdev_zone_mgmt_ioctl(struct block_device *bdev,
> -		fmode_t mode, unsigned int cmd, unsigned long arg)
> +		blk_mode_t mode, unsigned int cmd, unsigned long arg)
>  {
>  	return -ENOTTY;
>  }
> @@ -451,7 +451,7 @@ static inline void bio_release_page(struct bio *bio, struct page *page)
>  
>  struct request_queue *blk_alloc_queue(int node_id);
>  
> -int disk_scan_partitions(struct gendisk *disk, fmode_t mode);
> +int disk_scan_partitions(struct gendisk *disk, blk_mode_t mode);
>  
>  int disk_alloc_events(struct gendisk *disk);
>  void disk_add_events(struct gendisk *disk);
> @@ -466,8 +466,9 @@ extern struct device_attribute dev_attr_events_poll_msecs;
>  
>  extern struct attribute_group blk_trace_attr_group;
>  
> -int truncate_bdev_range(struct block_device *bdev, fmode_t mode, loff_t lstart,
> -		loff_t lend);
> +blk_mode_t file_to_blk_mode(struct file *file);
> +int truncate_bdev_range(struct block_device *bdev, blk_mode_t mode,
> +		loff_t lstart, loff_t lend);
>  long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg);
>  long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg);
>  
> diff --git a/block/fops.c b/block/fops.c
> index 9f26e25bafa172..928c37a214f785 100644
> --- a/block/fops.c
> +++ b/block/fops.c
> @@ -470,6 +470,24 @@ static int blkdev_fsync(struct file *filp, loff_t start, loff_t end,
>  	return error;
>  }
>  
> +blk_mode_t file_to_blk_mode(struct file *file)
> +{
> +	blk_mode_t mode = 0;
> +
> +	if (file->f_mode & FMODE_READ)
> +		mode |= BLK_OPEN_READ;
> +	if (file->f_mode & FMODE_WRITE)
> +		mode |= BLK_OPEN_WRITE;
> +	if (file->f_mode & FMODE_EXCL)
> +		mode |= BLK_OPEN_EXCL;
> +	if ((file->f_flags & O_ACCMODE) == 3)

I really don't like magic numbers like this.

Groan, O_RDONLY being defined as 0 strikes again...
Becuase of this quirk we internally map

O_RDONLY(0) -> FMODE_READ(1)
O_WRONLY(1) -> FMODE_WRITE(2)
O_RDWR(3)   -> (FMODE_READ | FMODE_WRITE)

so checking for the raw 3 here is confusing in addition to being a magic
number as it could give the impression that what's checked here is
(O_WRONLY | O_RDWR) which doesn't make sense...

So my perference would be in descending order of preference:

(file->f_flags & O_ACCMODE) == (FMODE_READ | FMODE_WRITE)

or while a little less clear but informative enough for people familiar
with the O_RDONLY quirk:

if ((file->f_flags & O_ACCMODE) == O_ACCMODE)

Re: [PATCH 28/31] block: replace fmode_t with a block-specific type for block open flags

[Christian Brauner]

On Wed, Jun 07, 2023 at 11:21:24AM +0200, Christian Brauner wrote:
> On Tue, Jun 06, 2023 at 09:39:47AM +0200, Christoph Hellwig wrote:
> > The only overlap between the block open flags mapped into the fmode_t and
> > other uses of fmode_t are FMODE_READ and FMODE_WRITE.  Define a new
> 
> and FMODE_EXCL afaict
> 
> > blk_mode_t instead for use in blkdev_get_by_*, ->open and ->ioctl and
> > stop abusing fmode_t.
> > 
> > Signed-off-by: Christoph Hellwig <hch@lst.de>
> > ---
> >  arch/um/drivers/ubd_kern.c          |  8 +++---
> >  arch/xtensa/platforms/iss/simdisk.c |  2 +-
> >  block/bdev.c                        | 32 +++++++++++-----------
> >  block/blk-zoned.c                   |  8 +++---
> >  block/blk.h                         | 11 ++++----
> >  block/fops.c                        | 26 +++++++++++++-----
> >  block/genhd.c                       |  8 +++---
> >  block/ioctl.c                       | 42 +++++++++--------------------
> >  drivers/block/amiflop.c             | 12 ++++-----
> >  drivers/block/aoe/aoeblk.c          |  4 +--
> >  drivers/block/ataflop.c             | 25 +++++++++--------
> >  drivers/block/drbd/drbd_main.c      |  7 ++---
> >  drivers/block/drbd/drbd_nl.c        |  2 +-
> >  drivers/block/floppy.c              | 28 +++++++++----------
> >  drivers/block/loop.c                | 22 +++++++--------
> >  drivers/block/mtip32xx/mtip32xx.c   |  4 +--
> >  drivers/block/nbd.c                 |  4 +--
> >  drivers/block/pktcdvd.c             | 17 ++++++------
> >  drivers/block/rbd.c                 |  2 +-
> >  drivers/block/rnbd/rnbd-clt.c       |  4 +--
> >  drivers/block/rnbd/rnbd-srv.c       |  4 +--
> >  drivers/block/sunvdc.c              |  2 +-
> >  drivers/block/swim.c                | 16 +++++------
> >  drivers/block/swim3.c               | 24 ++++++++---------
> >  drivers/block/ublk_drv.c            |  2 +-
> >  drivers/block/xen-blkback/xenbus.c  |  2 +-
> >  drivers/block/xen-blkfront.c        |  2 +-
> >  drivers/block/z2ram.c               |  2 +-
> >  drivers/block/zram/zram_drv.c       |  6 ++---
> >  drivers/cdrom/cdrom.c               |  4 +--
> >  drivers/cdrom/gdrom.c               |  4 +--
> >  drivers/md/bcache/bcache.h          |  2 +-
> >  drivers/md/bcache/request.c         |  4 +--
> >  drivers/md/bcache/super.c           |  6 ++---
> >  drivers/md/dm-cache-target.c        | 12 ++++-----
> >  drivers/md/dm-clone-target.c        | 10 +++----
> >  drivers/md/dm-core.h                |  7 +++--
> >  drivers/md/dm-era-target.c          |  6 +++--
> >  drivers/md/dm-ioctl.c               | 10 +++----
> >  drivers/md/dm-snap.c                |  4 +--
> >  drivers/md/dm-table.c               | 11 ++++----
> >  drivers/md/dm-thin.c                |  9 ++++---
> >  drivers/md/dm-verity-fec.c          |  2 +-
> >  drivers/md/dm-verity-target.c       |  6 ++---
> >  drivers/md/dm.c                     | 10 +++----
> >  drivers/md/dm.h                     |  2 +-
> >  drivers/md/md.c                     |  8 +++---
> >  drivers/mmc/core/block.c            |  8 +++---
> >  drivers/mtd/devices/block2mtd.c     |  4 +--
> >  drivers/mtd/mtd_blkdevs.c           |  4 +--
> >  drivers/mtd/ubi/block.c             |  5 ++--
> >  drivers/nvme/host/core.c            |  2 +-
> >  drivers/nvme/host/ioctl.c           |  8 +++---
> >  drivers/nvme/host/multipath.c       |  2 +-
> >  drivers/nvme/host/nvme.h            |  4 +--
> >  drivers/nvme/target/io-cmd-bdev.c   |  2 +-
> >  drivers/s390/block/dasd.c           |  6 ++---
> >  drivers/s390/block/dasd_genhd.c     |  3 ++-
> >  drivers/s390/block/dasd_int.h       |  3 ++-
> >  drivers/s390/block/dasd_ioctl.c     |  2 +-
> >  drivers/s390/block/dcssblk.c        |  4 +--
> >  drivers/scsi/sd.c                   | 19 ++++++-------
> >  drivers/scsi/sr.c                   | 10 +++----
> >  drivers/target/target_core_iblock.c |  5 ++--
> >  drivers/target/target_core_pscsi.c  |  4 +--
> >  fs/btrfs/dev-replace.c              |  2 +-
> >  fs/btrfs/super.c                    |  4 +--
> >  fs/btrfs/volumes.c                  | 16 +++++------
> >  fs/btrfs/volumes.h                  |  4 +--
> >  fs/erofs/super.c                    |  2 +-
> >  fs/ext4/super.c                     |  2 +-
> >  fs/jfs/jfs_logmgr.c                 |  2 +-
> >  fs/nfs/blocklayout/dev.c            |  5 ++--
> >  fs/ocfs2/cluster/heartbeat.c        |  3 ++-
> >  fs/reiserfs/journal.c               |  4 +--
> >  fs/xfs/xfs_super.c                  |  2 +-
> >  include/linux/blkdev.h              | 30 ++++++++++++++++-----
> >  include/linux/cdrom.h               |  3 ++-
> >  include/linux/device-mapper.h       |  8 +++---
> >  kernel/power/swap.c                 |  6 ++---
> >  mm/swapfile.c                       |  2 +-
> >  81 files changed, 324 insertions(+), 311 deletions(-)
> > 
> > diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
> > index 20c1a16199c503..50206feac577d5 100644
> > --- a/arch/um/drivers/ubd_kern.c
> > +++ b/arch/um/drivers/ubd_kern.c
> > @@ -108,9 +108,9 @@ static inline void ubd_set_bit(__u64 bit, unsigned char *data)
> >  static DEFINE_MUTEX(ubd_lock);
> >  static DEFINE_MUTEX(ubd_mutex); /* replaces BKL, might not be needed */
> >  
> > -static int ubd_open(struct gendisk *disk, fmode_t mode);
> > +static int ubd_open(struct gendisk *disk, blk_mode_t mode);
> >  static void ubd_release(struct gendisk *disk);
> > -static int ubd_ioctl(struct block_device *bdev, fmode_t mode,
> > +static int ubd_ioctl(struct block_device *bdev, blk_mode_t mode,
> >  		     unsigned int cmd, unsigned long arg);
> >  static int ubd_getgeo(struct block_device *bdev, struct hd_geometry *geo);
> >  
> > @@ -1154,7 +1154,7 @@ static int __init ubd_driver_init(void){
> >  
> >  device_initcall(ubd_driver_init);
> >  
> > -static int ubd_open(struct gendisk *disk, fmode_t mode)
> > +static int ubd_open(struct gendisk *disk, blk_mode_t mode)
> >  {
> >  	struct ubd *ubd_dev = disk->private_data;
> >  	int err = 0;
> > @@ -1389,7 +1389,7 @@ static int ubd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
> >  	return 0;
> >  }
> >  
> > -static int ubd_ioctl(struct block_device *bdev, fmode_t mode,
> > +static int ubd_ioctl(struct block_device *bdev, blk_mode_t mode,
> >  		     unsigned int cmd, unsigned long arg)
> >  {
> >  	struct ubd *ubd_dev = bdev->bd_disk->private_data;
> > diff --git a/arch/xtensa/platforms/iss/simdisk.c b/arch/xtensa/platforms/iss/simdisk.c
> > index 2ad9da3de0d90f..178cf96ca10acb 100644
> > --- a/arch/xtensa/platforms/iss/simdisk.c
> > +++ b/arch/xtensa/platforms/iss/simdisk.c
> > @@ -120,7 +120,7 @@ static void simdisk_submit_bio(struct bio *bio)
> >  	bio_endio(bio);
> >  }
> >  
> > -static int simdisk_open(struct gendisk *disk, fmode_t mode)
> > +static int simdisk_open(struct gendisk *disk, blk_mode_t mode)
> >  {
> >  	struct simdisk *dev = disk->private_data;
> >  
> > diff --git a/block/bdev.c b/block/bdev.c
> > index db63e5bcc46ffa..bd558a9ba3cd97 100644
> > --- a/block/bdev.c
> > +++ b/block/bdev.c
> > @@ -93,7 +93,7 @@ EXPORT_SYMBOL(invalidate_bdev);
> >   * Drop all buffers & page cache for given bdev range. This function bails
> >   * with error if bdev has other exclusive owner (such as filesystem).
> >   */
> > -int truncate_bdev_range(struct block_device *bdev, fmode_t mode,
> > +int truncate_bdev_range(struct block_device *bdev, blk_mode_t mode,
> >  			loff_t lstart, loff_t lend)
> >  {
> >  	/*
> > @@ -101,14 +101,14 @@ int truncate_bdev_range(struct block_device *bdev, fmode_t mode,
> >  	 * while we discard the buffer cache to avoid discarding buffers
> >  	 * under live filesystem.
> >  	 */
> > -	if (!(mode & FMODE_EXCL)) {
> > +	if (!(mode & BLK_OPEN_EXCL)) {
> >  		int err = bd_prepare_to_claim(bdev, truncate_bdev_range, NULL);
> >  		if (err)
> >  			goto invalidate;
> >  	}
> >  
> >  	truncate_inode_pages_range(bdev->bd_inode->i_mapping, lstart, lend);
> > -	if (!(mode & FMODE_EXCL))
> > +	if (!(mode & BLK_OPEN_EXCL))
> >  		bd_abort_claiming(bdev, truncate_bdev_range);
> >  	return 0;
> >  
> > @@ -647,7 +647,7 @@ static void blkdev_flush_mapping(struct block_device *bdev)
> >  	bdev_write_inode(bdev);
> >  }
> >  
> > -static int blkdev_get_whole(struct block_device *bdev, fmode_t mode)
> > +static int blkdev_get_whole(struct block_device *bdev, blk_mode_t mode)
> >  {
> >  	struct gendisk *disk = bdev->bd_disk;
> >  	int ret;
> > @@ -679,7 +679,7 @@ static void blkdev_put_whole(struct block_device *bdev)
> >  		bdev->bd_disk->fops->release(bdev->bd_disk);
> >  }
> >  
> > -static int blkdev_get_part(struct block_device *part, fmode_t mode)
> > +static int blkdev_get_part(struct block_device *part, blk_mode_t mode)
> >  {
> >  	struct gendisk *disk = part->bd_disk;
> >  	int ret;
> > @@ -743,11 +743,11 @@ void blkdev_put_no_open(struct block_device *bdev)
> >  {
> >  	put_device(&bdev->bd_device);
> >  }
> > -
> > +	
> 
> nit: This is whitespace damage, I think. There's a trailing tab.
> 
> >  /**
> >   * blkdev_get_by_dev - open a block device by device number
> >   * @dev: device number of block device to open
> > - * @mode: FMODE_* mask
> > + * @mode: open mode (BLK_OPEN_*)
> >   * @holder: exclusive holder identifier
> >   * @hops: holder operations
> >   *
> > @@ -765,7 +765,7 @@ void blkdev_put_no_open(struct block_device *bdev)
> >   * RETURNS:
> >   * Reference to the block_device on success, ERR_PTR(-errno) on failure.
> >   */
> > -struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
> > +struct block_device *blkdev_get_by_dev(dev_t dev, blk_mode_t mode, void *holder,
> >  		const struct blk_holder_ops *hops)
> >  {
> >  	bool unblock_events = true;
> > @@ -775,8 +775,8 @@ struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
> >  
> >  	ret = devcgroup_check_permission(DEVCG_DEV_BLOCK,
> >  			MAJOR(dev), MINOR(dev),
> > -			((mode & FMODE_READ) ? DEVCG_ACC_READ : 0) |
> > -			((mode & FMODE_WRITE) ? DEVCG_ACC_WRITE : 0));
> > +			((mode & BLK_OPEN_READ) ? DEVCG_ACC_READ : 0) |
> > +			((mode & BLK_OPEN_WRITE) ? DEVCG_ACC_WRITE : 0));
> >  	if (ret)
> >  		return ERR_PTR(ret);
> >  
> > @@ -786,12 +786,12 @@ struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
> >  	disk = bdev->bd_disk;
> >  
> >  	if (holder) {
> > -		mode |= FMODE_EXCL;
> > +		mode |= BLK_OPEN_EXCL;
> >  		ret = bd_prepare_to_claim(bdev, holder, hops);
> >  		if (ret)
> >  			goto put_blkdev;
> >  	} else {
> > -		if (WARN_ON_ONCE(mode & FMODE_EXCL)) {
> > +		if (WARN_ON_ONCE(mode & BLK_OPEN_EXCL)) {
> >  			ret = -EIO;
> >  			goto put_blkdev;
> >  		}
> > @@ -821,7 +821,7 @@ struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
> >  		 * writeable reference is too fragile given the way @mode is
> >  		 * used in blkdev_get/put().
> >  		 */
> > -		if ((mode & FMODE_WRITE) && !bdev->bd_write_holder &&
> > +		if ((mode & BLK_OPEN_WRITE) && !bdev->bd_write_holder &&
> >  		    (disk->event_flags & DISK_EVENT_FLAG_BLOCK_ON_EXCL_WRITE)) {
> >  			bdev->bd_write_holder = true;
> >  			unblock_events = false;
> > @@ -848,7 +848,7 @@ EXPORT_SYMBOL(blkdev_get_by_dev);
> >  /**
> >   * blkdev_get_by_path - open a block device by name
> >   * @path: path to the block device to open
> > - * @mode: FMODE_* mask
> > + * @mode: open mode (BLK_OPEN_*)
> >   * @holder: exclusive holder identifier
> >   *
> >   * Open the block device described by the device file at @path.  If @holder is
> > @@ -861,7 +861,7 @@ EXPORT_SYMBOL(blkdev_get_by_dev);
> >   * RETURNS:
> >   * Reference to the block_device on success, ERR_PTR(-errno) on failure.
> >   */
> > -struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
> > +struct block_device *blkdev_get_by_path(const char *path, blk_mode_t mode,
> >  		void *holder, const struct blk_holder_ops *hops)
> >  {
> >  	struct block_device *bdev;
> > @@ -873,7 +873,7 @@ struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
> >  		return ERR_PTR(error);
> >  
> >  	bdev = blkdev_get_by_dev(dev, mode, holder, hops);
> > -	if (!IS_ERR(bdev) && (mode & FMODE_WRITE) && bdev_read_only(bdev)) {
> > +	if (!IS_ERR(bdev) && (mode & BLK_OPEN_WRITE) && bdev_read_only(bdev)) {
> >  		blkdev_put(bdev, holder);
> >  		return ERR_PTR(-EACCES);
> >  	}
> > diff --git a/block/blk-zoned.c b/block/blk-zoned.c
> > index 02cc2c629ac9be..0f9f97cdddd99c 100644
> > --- a/block/blk-zoned.c
> > +++ b/block/blk-zoned.c
> > @@ -356,8 +356,8 @@ int blkdev_report_zones_ioctl(struct block_device *bdev, unsigned int cmd,
> >  	return 0;
> >  }
> >  
> > -static int blkdev_truncate_zone_range(struct block_device *bdev, fmode_t mode,
> > -				      const struct blk_zone_range *zrange)
> > +static int blkdev_truncate_zone_range(struct block_device *bdev,
> > +		blk_mode_t mode, const struct blk_zone_range *zrange)
> >  {
> >  	loff_t start, end;
> >  
> > @@ -376,7 +376,7 @@ static int blkdev_truncate_zone_range(struct block_device *bdev, fmode_t mode,
> >   * BLKRESETZONE, BLKOPENZONE, BLKCLOSEZONE and BLKFINISHZONE ioctl processing.
> >   * Called from blkdev_ioctl.
> >   */
> > -int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
> > +int blkdev_zone_mgmt_ioctl(struct block_device *bdev, blk_mode_t mode,
> >  			   unsigned int cmd, unsigned long arg)
> >  {
> >  	void __user *argp = (void __user *)arg;
> > @@ -390,7 +390,7 @@ int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
> >  	if (!bdev_is_zoned(bdev))
> >  		return -ENOTTY;
> >  
> > -	if (!(mode & FMODE_WRITE))
> > +	if (!(mode & BLK_OPEN_WRITE))
> >  		return -EBADF;
> >  
> >  	if (copy_from_user(&zrange, argp, sizeof(struct blk_zone_range)))
> > diff --git a/block/blk.h b/block/blk.h
> > index e28d5d67d31a28..768852a84fefb3 100644
> > --- a/block/blk.h
> > +++ b/block/blk.h
> > @@ -396,7 +396,7 @@ void disk_free_zone_bitmaps(struct gendisk *disk);
> >  void disk_clear_zone_settings(struct gendisk *disk);
> >  int blkdev_report_zones_ioctl(struct block_device *bdev, unsigned int cmd,
> >  		unsigned long arg);
> > -int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
> > +int blkdev_zone_mgmt_ioctl(struct block_device *bdev, blk_mode_t mode,
> >  		unsigned int cmd, unsigned long arg);
> >  #else /* CONFIG_BLK_DEV_ZONED */
> >  static inline void disk_free_zone_bitmaps(struct gendisk *disk) {}
> > @@ -407,7 +407,7 @@ static inline int blkdev_report_zones_ioctl(struct block_device *bdev,
> >  	return -ENOTTY;
> >  }
> >  static inline int blkdev_zone_mgmt_ioctl(struct block_device *bdev,
> > -		fmode_t mode, unsigned int cmd, unsigned long arg)
> > +		blk_mode_t mode, unsigned int cmd, unsigned long arg)
> >  {
> >  	return -ENOTTY;
> >  }
> > @@ -451,7 +451,7 @@ static inline void bio_release_page(struct bio *bio, struct page *page)
> >  
> >  struct request_queue *blk_alloc_queue(int node_id);
> >  
> > -int disk_scan_partitions(struct gendisk *disk, fmode_t mode);
> > +int disk_scan_partitions(struct gendisk *disk, blk_mode_t mode);
> >  
> >  int disk_alloc_events(struct gendisk *disk);
> >  void disk_add_events(struct gendisk *disk);
> > @@ -466,8 +466,9 @@ extern struct device_attribute dev_attr_events_poll_msecs;
> >  
> >  extern struct attribute_group blk_trace_attr_group;
> >  
> > -int truncate_bdev_range(struct block_device *bdev, fmode_t mode, loff_t lstart,
> > -		loff_t lend);
> > +blk_mode_t file_to_blk_mode(struct file *file);
> > +int truncate_bdev_range(struct block_device *bdev, blk_mode_t mode,
> > +		loff_t lstart, loff_t lend);
> >  long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg);
> >  long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg);
> >  
> > diff --git a/block/fops.c b/block/fops.c
> > index 9f26e25bafa172..928c37a214f785 100644
> > --- a/block/fops.c
> > +++ b/block/fops.c
> > @@ -470,6 +470,24 @@ static int blkdev_fsync(struct file *filp, loff_t start, loff_t end,
> >  	return error;
> >  }
> >  
> > +blk_mode_t file_to_blk_mode(struct file *file)
> > +{
> > +	blk_mode_t mode = 0;
> > +
> > +	if (file->f_mode & FMODE_READ)
> > +		mode |= BLK_OPEN_READ;
> > +	if (file->f_mode & FMODE_WRITE)
> > +		mode |= BLK_OPEN_WRITE;
> > +	if (file->f_mode & FMODE_EXCL)
> > +		mode |= BLK_OPEN_EXCL;
> > +	if ((file->f_flags & O_ACCMODE) == 3)
> 
> I really don't like magic numbers like this.
> 
> Groan, O_RDONLY being defined as 0 strikes again...
> Becuase of this quirk we internally map
> 
> O_RDONLY(0) -> FMODE_READ(1)
> O_WRONLY(1) -> FMODE_WRITE(2)
> O_RDWR(3)   -> (FMODE_READ | FMODE_WRITE)

s/O_RDWR(3)/O_RDWR(2)/

> 
> so checking for the raw 3 here is confusing in addition to being a magic
> number as it could give the impression that what's checked here is
> (O_WRONLY | O_RDWR) which doesn't make sense...
> 
> So my perference would be in descending order of preference:
> 
> (file->f_flags & O_ACCMODE) == (FMODE_READ | FMODE_WRITE)
> 
> or while a little less clear but informative enough for people familiar
> with the O_RDONLY quirk:
> 
> if ((file->f_flags & O_ACCMODE) == O_ACCMODE)

Re: [PATCH 28/31] block: replace fmode_t with a block-specific type for block open flags

[Christoph Hellwig]

On Wed, Jun 07, 2023 at 11:21:14AM +0200, Christian Brauner wrote:
> On Tue, Jun 06, 2023 at 09:39:47AM +0200, Christoph Hellwig wrote:
> > The only overlap between the block open flags mapped into the fmode_t and
> > other uses of fmode_t are FMODE_READ and FMODE_WRITE.  Define a new
> 
> and FMODE_EXCL afaict

FMODE_EXCL isn't used outside the block layer and removed in the last
patch.

> > +blk_mode_t file_to_blk_mode(struct file *file)
> > +{
> > +	blk_mode_t mode = 0;
> > +
> > +	if (file->f_mode & FMODE_READ)
> > +		mode |= BLK_OPEN_READ;
> > +	if (file->f_mode & FMODE_WRITE)
> > +		mode |= BLK_OPEN_WRITE;
> > +	if (file->f_mode & FMODE_EXCL)
> > +		mode |= BLK_OPEN_EXCL;
> > +	if ((file->f_flags & O_ACCMODE) == 3)
> 
> I really don't like magic numbers like this.

I don't like them either, but this is just moved around and not new.

> Groan, O_RDONLY being defined as 0 strikes again...
> Becuase of this quirk we internally map
> 
> O_RDONLY(0) -> FMODE_READ(1)
> O_WRONLY(1) -> FMODE_WRITE(2)
> O_RDWR(3)   -> (FMODE_READ | FMODE_WRITE)

O_RDWR is 2.

> so checking for the raw 3 here is confusing in addition to being a magic
> number as it could give the impression that what's checked here is
> (O_WRONLY | O_RDWR) which doesn't make sense...

Well, that is exactly what we check for.  This is a 30-ish year old
quirk only used in the floppy driver.

> So my perference would be in descending order of preference:
> 
> (file->f_flags & O_ACCMODE) == (FMODE_READ | FMODE_WRITE)
> 
> or while a little less clear but informative enough for people familiar
> with the O_RDONLY quirk:
> 
> if ((file->f_flags & O_ACCMODE) == O_ACCMODE)

I don't understand this part.  Especially the above doesn't make
any sense as FMODE_READ and FMODE_WRITE are in a completely different
symbol space to O_*, and not a UAPІ but a kernel internal thing that
could be renumbered any time.

Re: [PATCH 28/31] block: replace fmode_t with a block-specific type for block open flags

[Christian Brauner]

On Wed, Jun 07, 2023 at 02:16:58PM +0200, Christoph Hellwig wrote:
> On Wed, Jun 07, 2023 at 11:21:14AM +0200, Christian Brauner wrote:
> > On Tue, Jun 06, 2023 at 09:39:47AM +0200, Christoph Hellwig wrote:
> > > The only overlap between the block open flags mapped into the fmode_t and
> > > other uses of fmode_t are FMODE_READ and FMODE_WRITE.  Define a new
> > 
> > and FMODE_EXCL afaict
> 
> FMODE_EXCL isn't used outside the block layer and removed in the last
> patch.
> 
> > > +blk_mode_t file_to_blk_mode(struct file *file)
> > > +{
> > > +	blk_mode_t mode = 0;
> > > +
> > > +	if (file->f_mode & FMODE_READ)
> > > +		mode |= BLK_OPEN_READ;
> > > +	if (file->f_mode & FMODE_WRITE)
> > > +		mode |= BLK_OPEN_WRITE;
> > > +	if (file->f_mode & FMODE_EXCL)
> > > +		mode |= BLK_OPEN_EXCL;
> > > +	if ((file->f_flags & O_ACCMODE) == 3)
> > 
> > I really don't like magic numbers like this.
> 
> I don't like them either, but this is just moved around and not new.
> 
> > Groan, O_RDONLY being defined as 0 strikes again...
> > Becuase of this quirk we internally map
> > 
> > O_RDONLY(0) -> FMODE_READ(1)
> > O_WRONLY(1) -> FMODE_WRITE(2)
> > O_RDWR(3)   -> (FMODE_READ | FMODE_WRITE)
> 
> O_RDWR is 2.

Yeah, that was a typo. See the other mail I sent right after:
https://lore.kernel.org/all/20230607-kribbeln-dilettanten-b901b57dd962@brauner

> 
> > so checking for the raw 3 here is confusing in addition to being a magic
> > number as it could give the impression that what's checked here is
> > (O_WRONLY | O_RDWR) which doesn't make sense...
> 
> Well, that is exactly what we check for.  This is a 30-ish year old
> quirk only used in the floppy driver.

Ugh, it's f_flags. I misread that as f_mode...

This is rather ugly. Then please, make it explicit and check for
== (O_WRONLY | O_RDWR) and leave a brief comment.

Anything's better than that raw 3 in there. We just had fun with
figuring out why there was a raw coredump in fs/coredump.c 30 years
later.

Re: [PATCH 28/31] block: replace fmode_t with a block-specific type for block open flags

[Jinpu Wang]

On Tue, Jun 6, 2023 at 9:41 AM Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org> wrote:
>
> The only overlap between the block open flags mapped into the fmode_t and
> other uses of fmode_t are FMODE_READ and FMODE_WRITE.  Define a new
> blk_mode_t instead for use in blkdev_get_by_*, ->open and ->ioctl and
> stop abusing fmode_t.
>
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
> ---
>  arch/um/drivers/ubd_kern.c          |  8 +++---
>  arch/xtensa/platforms/iss/simdisk.c |  2 +-
>  block/bdev.c                        | 32 +++++++++++-----------
>  block/blk-zoned.c                   |  8 +++---
>  block/blk.h                         | 11 ++++----
>  block/fops.c                        | 26 +++++++++++++-----
>  block/genhd.c                       |  8 +++---
>  block/ioctl.c                       | 42 +++++++++--------------------
>  drivers/block/amiflop.c             | 12 ++++-----
>  drivers/block/aoe/aoeblk.c          |  4 +--
>  drivers/block/ataflop.c             | 25 +++++++++--------
>  drivers/block/drbd/drbd_main.c      |  7 ++---
>  drivers/block/drbd/drbd_nl.c        |  2 +-
>  drivers/block/floppy.c              | 28 +++++++++----------
>  drivers/block/loop.c                | 22 +++++++--------
>  drivers/block/mtip32xx/mtip32xx.c   |  4 +--
>  drivers/block/nbd.c                 |  4 +--
>  drivers/block/pktcdvd.c             | 17 ++++++------
>  drivers/block/rbd.c                 |  2 +-
>  drivers/block/rnbd/rnbd-clt.c       |  4 +--
>  drivers/block/rnbd/rnbd-srv.c       |  4 +--
Acked-by: Jack Wang <jinpu.wang-vEVw2sk9H7kAvxtiuMwx3w@public.gmane.org> # for rnbd.

[PATCH 29/31] block: always use I_BDEV on file->f_mapping->host to find the bdev

[Christoph Hellwig]

Always use I_BDEV(file->f_mapping->host) to find the bdev for a file to
free up file->private_data for other uses.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/fops.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/block/fops.c b/block/fops.c
index 928c37a214f785..c40b9f978e3bc7 100644
--- a/block/fops.c
+++ b/block/fops.c
@@ -54,7 +54,7 @@ static bool blkdev_dio_unaligned(struct block_device *bdev, loff_t pos,
 static ssize_t __blkdev_direct_IO_simple(struct kiocb *iocb,
 		struct iov_iter *iter, unsigned int nr_pages)
 {
-	struct block_device *bdev = iocb->ki_filp->private_data;
+	struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host);
 	struct bio_vec inline_vecs[DIO_INLINE_BIO_VECS], *vecs;
 	loff_t pos = iocb->ki_pos;
 	bool should_dirty = false;
@@ -170,7 +170,7 @@ static void blkdev_bio_end_io(struct bio *bio)
 static ssize_t __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
 		unsigned int nr_pages)
 {
-	struct block_device *bdev = iocb->ki_filp->private_data;
+	struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host);
 	struct blk_plug plug;
 	struct blkdev_dio *dio;
 	struct bio *bio;
@@ -310,7 +310,7 @@ static ssize_t __blkdev_direct_IO_async(struct kiocb *iocb,
 					struct iov_iter *iter,
 					unsigned int nr_pages)
 {
-	struct block_device *bdev = iocb->ki_filp->private_data;
+	struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host);
 	bool is_read = iov_iter_rw(iter) == READ;
 	blk_opf_t opf = is_read ? REQ_OP_READ : dio_bio_write_op(iocb);
 	struct blkdev_dio *dio;
@@ -451,7 +451,7 @@ static loff_t blkdev_llseek(struct file *file, loff_t offset, int whence)
 static int blkdev_fsync(struct file *filp, loff_t start, loff_t end,
 		int datasync)
 {
-	struct block_device *bdev = filp->private_data;
+	struct block_device *bdev = I_BDEV(filp->f_mapping->host);
 	int error;
 
 	error = file_write_and_wait_range(filp, start, end);
@@ -510,7 +510,6 @@ static int blkdev_open(struct inode *inode, struct file *filp)
 	if (IS_ERR(bdev))
 		return PTR_ERR(bdev);
 
-	filp->private_data = bdev;
 	filp->f_mapping = bdev->bd_inode->i_mapping;
 	filp->f_wb_err = filemap_sample_wb_err(filp->f_mapping);
 	return 0;
@@ -518,9 +517,8 @@ static int blkdev_open(struct inode *inode, struct file *filp)
 
 static int blkdev_release(struct inode *inode, struct file *filp)
 {
-	struct block_device *bdev = filp->private_data;
-
-	blkdev_put(bdev, (filp->f_mode & FMODE_EXCL) ? filp : NULL);
+	blkdev_put(I_BDEV(filp->f_mapping->host),
+		   (filp->f_mode & FMODE_EXCL) ? filp : NULL);
 	return 0;
 }
 
@@ -533,7 +531,7 @@ static int blkdev_release(struct inode *inode, struct file *filp)
  */
 static ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
 {
-	struct block_device *bdev = iocb->ki_filp->private_data;
+	struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host);
 	struct inode *bd_inode = bdev->bd_inode;
 	loff_t size = bdev_nr_bytes(bdev);
 	size_t shorted = 0;
@@ -569,7 +567,7 @@ static ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
 
 static ssize_t blkdev_read_iter(struct kiocb *iocb, struct iov_iter *to)
 {
-	struct block_device *bdev = iocb->ki_filp->private_data;
+	struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host);
 	loff_t size = bdev_nr_bytes(bdev);
 	loff_t pos = iocb->ki_pos;
 	size_t shorted = 0;
-- 
2.39.2

Re: [PATCH 29/31] block: always use I_BDEV on file->f_mapping->host to find the bdev

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:48AM +0200, Christoph Hellwig wrote:
> Always use I_BDEV(file->f_mapping->host) to find the bdev for a file to
> free up file->private_data for other uses.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 29/31] block: always use I_BDEV on file->f_mapping->host to find the bdev

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> Always use I_BDEV(file->f_mapping->host) to find the bdev for a file to
> free up file->private_data for other uses.
> 
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
> ---
>   block/fops.c | 18 ++++++++----------
>   1 file changed, 8 insertions(+), 10 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare-l3A5Bk7waGM@public.gmane.org>

Cheers,

Hannes

[PATCH 30/31] block: store the holder in file->private_data

[Christoph Hellwig]

Store the file struct used as the holder in file->private_data as an
indicator that this file descriptor was opened exclusively to  remove
the last use of FMODE_EXCL.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/fops.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/block/fops.c b/block/fops.c
index c40b9f978e3bc7..915e0ef7560993 100644
--- a/block/fops.c
+++ b/block/fops.c
@@ -478,7 +478,7 @@ blk_mode_t file_to_blk_mode(struct file *file)
 		mode |= BLK_OPEN_READ;
 	if (file->f_mode & FMODE_WRITE)
 		mode |= BLK_OPEN_WRITE;
-	if (file->f_mode & FMODE_EXCL)
+	if (file->private_data)
 		mode |= BLK_OPEN_EXCL;
 	if ((file->f_flags & O_ACCMODE) == 3)
 		mode |= BLK_OPEN_WRITE_IOCTL;
@@ -501,12 +501,15 @@ static int blkdev_open(struct inode *inode, struct file *filp)
 	filp->f_flags |= O_LARGEFILE;
 	filp->f_mode |= FMODE_NOWAIT | FMODE_BUF_RASYNC;
 
+	/*
+	 * Use the file private data to store the holder, file_to_blk_mode
+	 * relies on this.
+	 */
 	if (filp->f_flags & O_EXCL)
-		filp->f_mode |= FMODE_EXCL;
+		filp->private_data = filp;
 
 	bdev = blkdev_get_by_dev(inode->i_rdev, file_to_blk_mode(filp),
-				 (filp->f_mode & FMODE_EXCL) ? filp : NULL,
-				 NULL);
+				 filp->private_data, NULL);
 	if (IS_ERR(bdev))
 		return PTR_ERR(bdev);
 
@@ -517,8 +520,7 @@ static int blkdev_open(struct inode *inode, struct file *filp)
 
 static int blkdev_release(struct inode *inode, struct file *filp)
 {
-	blkdev_put(I_BDEV(filp->f_mapping->host),
-		   (filp->f_mode & FMODE_EXCL) ? filp : NULL);
+	blkdev_put(I_BDEV(filp->f_mapping->host), filp->private_data);
 	return 0;
 }
 
-- 
2.39.2

Re: [PATCH 30/31] block: store the holder in file->private_data

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:49AM +0200, Christoph Hellwig wrote:
> Store the file struct used as the holder in file->private_data as an
> indicator that this file descriptor was opened exclusively to  remove
> the last use of FMODE_EXCL.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Feels a bit odd to store the object itself but anyway,
Acked-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 30/31] block: store the holder in file->private_data

[Christoph Hellwig]

On Wed, Jun 07, 2023 at 11:24:55AM +0200, Christian Brauner wrote:
> On Tue, Jun 06, 2023 at 09:39:49AM +0200, Christoph Hellwig wrote:
> > Store the file struct used as the holder in file->private_data as an
> > indicator that this file descriptor was opened exclusively to  remove
> > the last use of FMODE_EXCL.
> > 
> > Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
> > ---
> 
> Feels a bit odd to store the object itself but anyway,
> Acked-by: Christian Brauner <brauner-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>

We could literally store anything we want.  The only reason I picked the
file is because: a) we have it around and b) that allows passing it
to blkdev_put without a branch in blkdev_release.

If you prefer something else I can change it.

Re: [PATCH 30/31] block: store the holder in file->private_data

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> Store the file struct used as the holder in file->private_data as an
> indicator that this file descriptor was opened exclusively to  remove
> the last use of FMODE_EXCL.
> 
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
> ---
>   block/fops.c | 14 ++++++++------
>   1 file changed, 8 insertions(+), 6 deletions(-)
> 
> diff --git a/block/fops.c b/block/fops.c
> index c40b9f978e3bc7..915e0ef7560993 100644
> --- a/block/fops.c
> +++ b/block/fops.c
> @@ -478,7 +478,7 @@ blk_mode_t file_to_blk_mode(struct file *file)
>   		mode |= BLK_OPEN_READ;
>   	if (file->f_mode & FMODE_WRITE)
>   		mode |= BLK_OPEN_WRITE;
> -	if (file->f_mode & FMODE_EXCL)
> +	if (file->private_data)
>   		mode |= BLK_OPEN_EXCL;
>   	if ((file->f_flags & O_ACCMODE) == 3)
>   		mode |= BLK_OPEN_WRITE_IOCTL;
> @@ -501,12 +501,15 @@ static int blkdev_open(struct inode *inode, struct file *filp)
>   	filp->f_flags |= O_LARGEFILE;
>   	filp->f_mode |= FMODE_NOWAIT | FMODE_BUF_RASYNC;
>   
> +	/*
> +	 * Use the file private data to store the holder, file_to_blk_mode
> +	 * relies on this.
> +	 */

Can you update the comment to reflect that we're only use the
->private_data field for exclusive open?
I know it's indicated by the condition, but we really should
be clarify this usage.

>   	if (filp->f_flags & O_EXCL)
> -		filp->f_mode |= FMODE_EXCL;
> +		filp->private_data = filp;
>   
>   	bdev = blkdev_get_by_dev(inode->i_rdev, file_to_blk_mode(filp),
> -				 (filp->f_mode & FMODE_EXCL) ? filp : NULL,
> -				 NULL);
> +				 filp->private_data, NULL);
>   	if (IS_ERR(bdev))
>   		return PTR_ERR(bdev);
>   
> @@ -517,8 +520,7 @@ static int blkdev_open(struct inode *inode, struct file *filp)
>   
>   static int blkdev_release(struct inode *inode, struct file *filp)
>   {
> -	blkdev_put(I_BDEV(filp->f_mapping->host),
> -		   (filp->f_mode & FMODE_EXCL) ? filp : NULL);
> +	blkdev_put(I_BDEV(filp->f_mapping->host), filp->private_data);
>   	return 0;
>   }
>   
Other than that:

Reviewed-by: Hannes Reinecke <hare-l3A5Bk7waGM@public.gmane.org>

Cheers,

Hannes

[PATCH 31/31] fs: remove the now unused FMODE_* flags

[Christoph Hellwig]

FMODE_NDELAY, FMODE_EXCL and FMODE_WRITE_IOCTL were only used for
block internal purposed and are now entirely unused, so remove them.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 include/linux/fs.h | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index ad1d2c9afb3fa4..8045c7ef4000c2 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -119,13 +119,6 @@ typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
 #define FMODE_PWRITE		((__force fmode_t)0x10)
 /* File is opened for execution with sys_execve / sys_uselib */
 #define FMODE_EXEC		((__force fmode_t)0x20)
-/* File is opened with O_NDELAY (only set for block devices) */
-#define FMODE_NDELAY		((__force fmode_t)0x40)
-/* File is opened with O_EXCL (only set for block devices) */
-#define FMODE_EXCL		((__force fmode_t)0x80)
-/* File is opened using open(.., 3, ..) and is writeable only for ioctls
-   (specialy hack for floppy.c) */
-#define FMODE_WRITE_IOCTL	((__force fmode_t)0x100)
 /* 32bit hashes as llseek() offset (for directories) */
 #define FMODE_32BITHASH         ((__force fmode_t)0x200)
 /* 64bit hashes as llseek() offset (for directories) */
-- 
2.39.2

Re: [PATCH 31/31] fs: remove the now unused FMODE_* flags

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:50AM +0200, Christoph Hellwig wrote:
> FMODE_NDELAY, FMODE_EXCL and FMODE_WRITE_IOCTL were only used for
> block internal purposed and are now entirely unused, so remove them.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Love it,
Reviewed-by: Christian Brauner <brauner@kernel.org>

Re: [PATCH 31/31] fs: remove the now unused FMODE_* flags

[Hannes Reinecke]

On 6/6/23 09:39, Christoph Hellwig wrote:
> FMODE_NDELAY, FMODE_EXCL and FMODE_WRITE_IOCTL were only used for
> block internal purposed and are now entirely unused, so remove them.
> 
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
> ---
>   include/linux/fs.h | 7 -------
>   1 file changed, 7 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare-l3A5Bk7waGM@public.gmane.org>

Cheers,

Hannes

Re: decouple block open flags from fmode_t

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:19AM +0200, Christoph Hellwig wrote:
> Hi all,
> 
> this series adds a new blk_mode_t for block open flags instead of abusing

Trying to look at this series applied but doesn't apply cleanly for
anything v6.4-rc* related. What tree is this on?

Re: decouple block open flags from fmode_t

[Christoph Hellwig]

On Tue, Jun 06, 2023 at 10:27:14AM +0200, Christian Brauner wrote:
> On Tue, Jun 06, 2023 at 09:39:19AM +0200, Christoph Hellwig wrote:
> > Hi all,
> > 
> > this series adds a new blk_mode_t for block open flags instead of abusing
> 
> Trying to look at this series applied but doesn't apply cleanly for
> anything v6.4-rc* related. What tree is this on?

Jens' for-6.5/block tree.

I also have a git tree here:

    git://git.infradead.org/users/hch/block.git blk-open-release

Gitweb:

    http://git.infradead.org/users/hch/block.git/shortlog/refs/heads/blk-open-release

Re: decouple block open flags from fmode_t

[Christian Brauner]

On Tue, Jun 06, 2023 at 10:40:42AM +0200, Christoph Hellwig wrote:
> On Tue, Jun 06, 2023 at 10:27:14AM +0200, Christian Brauner wrote:
> > On Tue, Jun 06, 2023 at 09:39:19AM +0200, Christoph Hellwig wrote:
> > > Hi all,
> > > 
> > > this series adds a new blk_mode_t for block open flags instead of abusing
> > 
> > Trying to look at this series applied but doesn't apply cleanly for
> > anything v6.4-rc* related. What tree is this on?
> 
> Jens' for-6.5/block tree.
> 
> I also have a git tree here:
> 
>     git://git.infradead.org/users/hch/block.git blk-open-release
> 
> Gitweb:
> 
>     http://git.infradead.org/users/hch/block.git/shortlog/refs/heads/blk-open-release


Thanks! I pulled from your tree.