[PATCH 15/29] scsi: target: Convert to bdev_open_by_path()

Jan Kara
2023-09-27T09:35:17Z

Convert iblock and pscsi drivers to use bdev_open_by_path() and pass the
handle around.

CC: target-devel@vger.kernel.org
CC: linux-scsi@vger.kernel.org
Acked-by: Christoph Hellwig <hch@lst.de>
Acked-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Jan Kara <jack@suse.cz>
---
drivers/target/target_core_iblock.c | 19 +++++++++++--------
drivers/target/target_core_iblock.h | 1 +
drivers/target/target_core_pscsi.c | 26 +++++++++++++-------------
drivers/target/target_core_pscsi.h | 2 +-
4 files changed, 26 insertions(+), 22 deletions(-)

diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index a6a06a5f7483..8eb9eb7ce5df 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -91,7 +91,8 @@ static int iblock_configure_device(struct se_device *dev)
{
struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
struct request_queue *q;
- struct block_device *bd = NULL;
+ struct bdev_handle *bdev_handle;
+ struct block_device *bd;
struct blk_integrity *bi;
blk_mode_t mode = BLK_OPEN_READ;
unsigned int max_write_zeroes_sectors;
@@ -116,12 +117,14 @@ static int iblock_configure_device(struct se_device *dev)
else
dev->dev_flags |= DF_READ_ONLY;

- bd = blkdev_get_by_path(ib_dev->ibd_udev_path, mode, ib_dev, NULL);
- if (IS_ERR(bd)) {
- ret = PTR_ERR(bd);
+ bdev_handle = bdev_open_by_path(ib_dev->ibd_udev_path, mode, ib_dev,
+ NULL);
+ if (IS_ERR(bdev_handle)) {
+ ret = PTR_ERR(bdev_handle);
goto out_free_bioset;
}
- ib_dev->ibd_bd = bd;
+ ib_dev->ibd_bdev_handle = bdev_handle;
+ ib_dev->ibd_bd = bd = bdev_handle->bdev;

q = bdev_get_queue(bd);

@@ -177,7 +180,7 @@ static int iblock_configure_device(struct se_device *dev)
return 0;

out_blkdev_put:
- blkdev_put(ib_dev->ibd_bd, ib_dev);
+ bdev_release(ib_dev->ibd_bdev_handle);
out_free_bioset:
bioset_exit(&ib_dev->ibd_bio_set);
out:
@@ -202,8 +205,8 @@ 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, ib_dev);
+ if (ib_dev->ibd_bdev_handle)
+ bdev_release(ib_dev->ibd_bdev_handle);
bioset_exit(&ib_dev->ibd_bio_set);
}

diff --git a/drivers/target/target_core_iblock.h b/drivers/target/target_core_iblock.h
index 8c55375d2f75..683f9a55945b 100644
--- a/drivers/target/target_core_iblock.h
+++ b/drivers/target/target_core_iblock.h
@@ -32,6 +32,7 @@ struct iblock_dev {
u32 ibd_flags;
struct bio_set ibd_bio_set;
struct block_device *ibd_bd;
+ struct bdev_handle *ibd_bdev_handle;
bool ibd_readonly;
struct iblock_dev_plug *ibd_plug;
} ____cacheline_aligned;
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index 0d4f09693ef4..41b7489d37ce 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -352,7 +352,7 @@ static int pscsi_create_type_disk(struct se_device *dev, struct scsi_device *sd)
struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
struct Scsi_Host *sh = sd->host;
- struct block_device *bd;
+ struct bdev_handle *bdev_handle;
int ret;

if (scsi_device_get(sd)) {
@@ -366,18 +366,18 @@ 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, BLK_OPEN_WRITE | BLK_OPEN_READ,
- pdv, NULL);
- if (IS_ERR(bd)) {
- pr_err("pSCSI: blkdev_get_by_path() failed\n");
+ bdev_handle = bdev_open_by_path(dev->udev_path,
+ BLK_OPEN_WRITE | BLK_OPEN_READ, pdv, NULL);
+ if (IS_ERR(bdev_handle)) {
+ pr_err("pSCSI: bdev_open_by_path() failed\n");
scsi_device_put(sd);
- return PTR_ERR(bd);
+ return PTR_ERR(bdev_handle);
}
- pdv->pdv_bd = bd;
+ pdv->pdv_bdev_handle = bdev_handle;

ret = pscsi_add_device_to_list(dev, sd);
if (ret) {
- blkdev_put(pdv->pdv_bd, pdv);
+ bdev_release(bdev_handle);
scsi_device_put(sd);
return ret;
}
@@ -564,9 +564,9 @@ static void pscsi_destroy_device(struct se_device *dev)
* from pscsi_create_type_disk()
*/
if ((sd->type == TYPE_DISK || sd->type == TYPE_ZBC) &&
- pdv->pdv_bd) {
- blkdev_put(pdv->pdv_bd, pdv);
- pdv->pdv_bd = NULL;
+ pdv->pdv_bdev_handle) {
+ bdev_release(pdv->pdv_bdev_handle);
+ pdv->pdv_bdev_handle = NULL;
}
/*
* For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference
@@ -994,8 +994,8 @@ static sector_t pscsi_get_blocks(struct se_device *dev)
{
struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);

- if (pdv->pdv_bd)
- return bdev_nr_sectors(pdv->pdv_bd);
+ if (pdv->pdv_bdev_handle)
+ return bdev_nr_sectors(pdv->pdv_bdev_handle->bdev);
return 0;
}

diff --git a/drivers/target/target_core_pscsi.h b/drivers/target/target_core_pscsi.h
index 23d9a6e340d4..b0a3ef136592 100644
--- a/drivers/target/target_core_pscsi.h
+++ b/drivers/target/target_core_pscsi.h
@@ -37,7 +37,7 @@ struct pscsi_dev_virt {
int pdv_channel_id;
int pdv_target_id;
int pdv_lun_id;
- struct block_device *pdv_bd;
+ struct bdev_handle *pdv_bdev_handle;
struct scsi_device *pdv_sd;
struct Scsi_Host *pdv_lld_host;
} ____cacheline_aligned;
--
2.35.3