[PATCH RFC v3 for-6.8/block 00/17] block: don't access bd_inode directly from other modules

Yu Kuai
2023-12-21T08:59:16Z

From: Yu Kuai <yukuai3@huawei.com>

Changes in v3:
- remove bdev_associated_mapping() and patch 12 from v1;
- add kerneldoc comments for new bdev apis;
- rename __bdev_get_folio() to bdev_get_folio;
- fix a problem in erofs that erofs_init_metabuf() is not always
called.
- add reviewed-by tag for patch 15-17;
Changes in v2:
- remove some bdev apis that is not necessary;
- pass in offset for bdev_read_folio() and __bdev_get_folio();
- remove bdev_gfp_constraint() and add a new helper in fs/buffer.c to
prevent access bd_indoe() directly from mapping_gfp_constraint() in
ext4.(patch 15, 16);
- remove block_device_ejected() from ext4.

Patch 1 add some bdev apis, then follow up patches will use these apis
to avoid access bd_inode directly, and hopefully the field bd_inode can
be removed eventually(after figure out a way for fs/buffer.c).

Yu Kuai (17):
block: add some bdev apis
xen/blkback: use bdev api in xen_update_blkif_status()
bcache: use bdev api in read_super()
mtd: block2mtd: use bdev apis
s390/dasd: use bdev api in dasd_format()
scsicam: use bdev api in scsi_bios_ptable()
bcachefs: remove dead function bdev_sectors()
bio: export bio_add_folio_nofail()
btrfs: use bdev apis
cramfs: use bdev apis in cramfs_blkdev_read()
erofs: use bdev api
nilfs2: use bdev api in nilfs_attach_log_writer()
jbd2: use bdev apis
buffer: add a new helper to read sb block
ext4: use new helper to read sb block
ext4: remove block_device_ejected()
ext4: use bdev apis

block/bdev.c | 148 +++++++++++++++++++++++++++++
block/bio.c | 1 +
block/blk.h | 2 -
drivers/block/xen-blkback/xenbus.c | 3 +-
drivers/md/bcache/super.c | 11 +--
drivers/mtd/devices/block2mtd.c | 81 +++++++---------
drivers/s390/block/dasd_ioctl.c | 5 +-
drivers/scsi/scsicam.c | 4 +-
fs/bcachefs/util.h | 5 -
fs/btrfs/disk-io.c | 71 +++++++-------
fs/btrfs/volumes.c | 17 ++--
fs/btrfs/zoned.c | 15 +--
fs/buffer.c | 68 +++++++++----
fs/cramfs/inode.c | 36 +++----
fs/erofs/data.c | 18 ++--
fs/erofs/internal.h | 2 +
fs/ext4/dir.c | 6 +-
fs/ext4/ext4.h | 13 ---
fs/ext4/ext4_jbd2.c | 6 +-
fs/ext4/inode.c | 8 +-
fs/ext4/super.c | 66 +++----------
fs/ext4/symlink.c | 2 +-
fs/jbd2/journal.c | 3 +-
fs/jbd2/recovery.c | 6 +-
fs/nilfs2/segment.c | 2 +-
include/linux/blkdev.h | 17 ++++
include/linux/buffer_head.h | 18 +++-
27 files changed, 377 insertions(+), 257 deletions(-)

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2.39.2