[dm-devel] [git pull] device mapper changes for 6.4

[Mike Snitzer <snitzer@kernel.org>]

Hi Linus,

The following changes since commit 666eed46769d929c3e13636134ecfc67d75ef548:

  dm: fix __send_duplicate_bios() to always allow for splitting IO (2023-03-30 15:54:32 -0400)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git tags/for-6.4/dm-changes

for you to fetch changes up to 38d11da522aacaa05898c734a1cec86f1e611129:

  dm: don't lock fs when the map is NULL in process of resume (2023-04-19 11:51:37 -0400)

Please pull, thanks.
Mike

----------------------------------------------------------------
- Split dm-bufio's rw_semaphore and rbtree. Offers improvements to
  dm-bufio's locking to allow increased concurrent IO -- particularly
  for read access for buffers already in dm-bufio's cache.

- Also split dm-bio-prison-v1's spinlock and rbtree with comparable
  aim at improving concurrent IO (for the DM thinp target).

- Both the dm-bufio and dm-bio-prison-v1 scaling of the number of
  locks and rbtrees used are managed by dm_num_hash_locks(). And the
  hash function used by both is dm_hash_locks_index().

- Allow DM targets to require DISCARD, WRITE_ZEROES and SECURE_ERASE
  to be split at the target specified boundary (in terms of
  max_discard_sectors, max_write_zeroes_sectors and
  max_secure_erase_sectors respectively).

- DM verity error handling fix for check_at_most_once on FEC.

- Update DM verity target to emit audit events on verification failure
  and more.

- DM core ->io_hints improvements needed in support of new discard
  support that is added to the DM "zero" and "error" targets.

- Fix missing kmem_cache_destroy() call in initialization error path
  of both the DM integrity and DM clone targets.

- A couple fixes for DM flakey, also add "error_reads" feature.

- Fix DM core's resume to not lock FS when the DM map is NULL;
  otherwise initial table load can race with FS mount that takes
  superblock's ->s_umount rw_semaphore.

- Various small improvements to both DM core and DM targets.
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----------------------------------------------------------------
Joe Thornber (8):
      dm bufio: remove unused dm_bufio_release_move interface
      dm bufio: add LRU abstraction
      dm bufio: add dm_buffer_cache abstraction
      dm bufio: improve concurrent IO performance
      dm bufio: add lock_history optimization for cache iterators
      dm thin: speed up cell_defer_no_holder()
      dm bio prison v1: improve concurrent IO performance
      dm: improve hash_locks sizing and hash function

Li Lingfeng (1):
      dm: don't lock fs when the map is NULL in process of resume

Michael Weiß (1):
      dm verity: emit audit events on verification failure and more

Mike Snitzer (16):
      dm bufio: use WARN_ON in dm_bufio_client_destroy and dm_bufio_exit
      dm bufio: never crash if dm_bufio_in_request()
      dm bufio: don't bug for clear developer oversight
      dm bufio: move dm_bufio_client members to avoid spanning cachelines
      dm: split discards further if target sets max_discard_granularity
      dm bio prison v1: add dm_cell_key_has_valid_range
      dm: add dm_num_hash_locks()
      dm bufio: prepare to intelligently size dm_buffer_cache's buffer_trees
      dm bufio: intelligently size dm_buffer_cache's buffer_trees
      dm bio prison v1: prepare to intelligently size dm_bio_prison's prison_regions
      dm bio prison v1: intelligently size dm_bio_prison's prison_regions
      dm clone: call kmem_cache_destroy() in dm_clone_init() error path
      dm integrity: call kmem_cache_destroy() in dm_integrity_init() error path
      dm: allow targets to require splitting WRITE_ZEROES and SECURE_ERASE
      dm: unexport dm_get_queue_limits()
      dm ioctl: fix nested locking in table_clear() to remove deadlock concern

Mikulas Patocka (8):
      dm bufio: use waitqueue_active in __free_buffer_wake
      dm bufio: use multi-page bio vector
      dm table: allow targets without devices to set ->io_hints
      dm zero: add discard support
      dm error: add discard support
      dm flakey: fix a crash with invalid table line
      dm flakey: remove trailing space in the table line
      dm flakey: add an "error_reads" option

Tom Rix (1):
      dm raid: remove unused d variable

Yangtao Li (3):
      dm: push error reporting down to dm_register_target()
      dm mirror: add DMERR message if alloc_workqueue fails
      dm: add helper macro for simple DM target module init and exit

Yeongjin Gil (1):
      dm verity: fix error handling for check_at_most_once on FEC

Yu Zhe (1):
      dm: remove unnecessary (void*) conversions

 .../admin-guide/device-mapper/dm-flakey.rst        |    4 +
 drivers/md/dm-bio-prison-v1.c                      |   94 +-
 drivers/md/dm-bio-prison-v1.h                      |   15 +
 drivers/md/dm-bufio.c                              | 1988 ++++++++++++++------
 drivers/md/dm-cache-target.c                       |    1 -
 drivers/md/dm-clone-target.c                       |    2 +-
 drivers/md/dm-crypt.c                              |   20 +-
 drivers/md/dm-delay.c                              |   26 +-
 drivers/md/dm-dust.c                               |   19 +-
 drivers/md/dm-ebs-target.c                         |   19 +-
 drivers/md/dm-era-target.c                         |   22 +-
 drivers/md/dm-flakey.c                             |   71 +-
 drivers/md/dm-integrity.c                          |   15 +-
 drivers/md/dm-io.c                                 |    4 +-
 drivers/md/dm-ioctl.c                              |   12 +-
 drivers/md/dm-kcopyd.c                             |    4 +-
 drivers/md/dm-linear.c                             |    6 +-
 drivers/md/dm-log-writes.c                         |   21 +-
 drivers/md/dm-log.c                                |   24 +-
 drivers/md/dm-mpath.c                              |    5 +-
 drivers/md/dm-raid.c                               |   22 +-
 drivers/md/dm-raid1.c                              |   24 +-
 drivers/md/dm-snap-persistent.c                    |    2 +-
 drivers/md/dm-snap.c                               |   12 +-
 drivers/md/dm-stripe.c                             |    4 +-
 drivers/md/dm-switch.c                             |   20 +-
 drivers/md/dm-table.c                              |    6 +-
 drivers/md/dm-target.c                             |   20 +-
 drivers/md/dm-thin.c                               |  125 +-
 drivers/md/dm-unstripe.c                           |   14 +-
 drivers/md/dm-verity-fec.c                         |    4 +-
 drivers/md/dm-verity-target.c                      |   42 +-
 drivers/md/dm-writecache.c                         |   22 +-
 drivers/md/dm-zero.c                               |   31 +-
 drivers/md/dm-zoned-metadata.c                     |    6 +-
 drivers/md/dm-zoned-target.c                       |   16 +-
 drivers/md/dm.c                                    |   47 +-
 drivers/md/dm.h                                    |   22 +
 include/linux/device-mapper.h                      |   40 +-
 include/linux/dm-bufio.h                           |    6 -
 include/uapi/linux/dm-ioctl.h                      |    4 +-
 41 files changed, 1777 insertions(+), 1084 deletions(-)

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