device mapper changes for 5.13

Hi Linus,

Some changes were slightly late and their inclusion made later because I had a worse-than-expected reaction to my 2nd covid shot the past couple days. Nothing crazy here but wanted to explain why some commits are recent.

The following changes since commit 4edbe1d7bcffcd6269f3b5eb63f710393ff2ec7a:

dm ioctl: fix out of bounds array access when no devices (2021-03-26 14:51:50 -0400)

are available in the Git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git tags/for-5.13/dm-changes

for you to fetch changes up to ca4a4e9a55beeb138bb06e3867f5e486da896d44:

dm raid: remove unnecessary discard limits for raid0 and raid10 (2021-04-30 14:38:37 -0400)

Please pull, thanks.
Mike

----------------------------------------------------------------
- Improve scalability of DM's device hash by switching to rbtree

- Extend DM ioctl's DM_LIST_DEVICES_CMD handling to include UUID and allow filtering based on name or UUID prefix.

- Various small fixes for typos, warnings, unused function, or needlessly exported interfaces.

- Remove needless request_queue NULL pointer checks in DM thin and cache targets.

- Remove unnecessary loop in DM core's __split_and_process_bio().

- Remove DM core's dm_vcalloc() and just use kvcalloc or kvmalloc_array instead (depending whether zeroing is useful).

- Fix request-based DM's double free of blk_mq_tag_set in device remove after table load fails.

- Improve DM persistent data performance on non-x86 by fixing packed structs to have a stated alignment. Also remove needless extra work from redundant calls to sm_disk_get_nr_free() and a paranoid BUG_ON() that caused duplicate checksum calculation.

- Fix missing goto in DM integrity's bitmap_flush_interval error handling.

- Add "reset_recalculate" feature flag to DM integrity.

- Improve DM integrity by leveraging discard support to avoid needless re-writing of metadata and also use discard support to improve hash recalculation.

- Fix race with DM raid target's reshape and MD raid4/5/6 resync that resulted in inconsistant reshape state during table reloads.

- Update DM raid target to temove unnecessary discard limits for raid0 and raid10 now that MD has optimized discard handling for both raid levels.

----------------------------------------------------------------
Benjamin Block (1):
dm rq: fix double free of blk_mq_tag_set in dev remove after table load fails

Bhaskar Chowdhury (1):
dm ebs: fix a few typos

Christoph Hellwig (1):
dm: unexport dm_{get,put}_table_device

Gustavo A. R. Silva (1):
dm raid: fix fall-through warning in rs_check_takeover() for Clang

Heinz Mauelshagen (1):
dm raid: fix inconclusive reshape layout on fast raid4/5/6 table reload sequences

JeongHyeon Lee (1):
dm verity: allow only one error handling mode

Jiapeng Chong (2):
dm persistent data: remove unused return from exit_shadow_spine() dm clone metadata: remove unused function

Joe Thornber (4):
dm space map disk: remove redundant calls to sm_disk_get_nr_free() dm btree spine: remove paranoid node_check call in node_prep_for_write() dm persistent data: packed struct should have an aligned() attribute too dm space map common: fix division bug in sm_ll_find_free_block()

Julia Lawall (1):
dm writecache: fix flexible_array.cocci warnings

Matthew Wilcox (Oracle) (1):
dm: replace dm_vcalloc()

Mike Snitzer (1):
dm raid: remove unnecessary discard limits for raid0 and raid10

Mikulas Patocka (8):
dm: remove useless loop in __split_and_process_bio
dm ioctl: replace device hash with red-black tree
dm ioctl: return UUID in DM_LIST_DEVICES_CMD result
dm ioctl: filter the returned values according to name or uuid prefix dm integrity: add the "reset_recalculate" feature flag
dm integrity: don't re-write metadata if discarding same blocks dm integrity: increase RECALC_SECTORS to improve recalculate speed dm integrity: use discard support when recalculating

Tian Tao (1):
dm integrity: fix missing goto in bitmap_flush_interval error handling

Xu Wang (2):
dm thin: remove needless request_queue NULL pointer check dm cache: remove needless request_queue NULL pointer checks

 drivers/md/dm-cache-target.c                     |   2 +-
 drivers/md/dm-clone-metadata.c                   |   6 -
 drivers/md/dm-ebs-target.c                       |   6 +-
 drivers/md/dm-integrity.c                        |  85 ++++---
 drivers/md/dm-ioctl.c                            | 294 ++++++++++++++---------
 drivers/md/dm-raid.c                             |  44 ++--
 drivers/md/dm-rq.c                               |   2 +
 drivers/md/dm-snap-persistent.c                  |   6 +-
 drivers/md/dm-snap.c                             |   5 +-
 drivers/md/dm-table.c                            |  30 +--
 drivers/md/dm-thin.c                             |   2 +-
 drivers/md/dm-verity-target.c                    |  40 ++-
 drivers/md/dm-writecache.c                       |   2 +-
 drivers/md/dm.c                                  |  63 +++--
 drivers/md/persistent-data/dm-btree-internal.h   |   6 +-
 drivers/md/persistent-data/dm-btree-spine.c      |   8 +-
 drivers/md/persistent-data/dm-space-map-common.c |   2 +
 drivers/md/persistent-data/dm-space-map-common.h |   8 +-
 drivers/md/persistent-data/dm-space-map-disk.c   |   9 -
 include/linux/device-mapper.h                    |   5 -
 include/uapi/linux/dm-ioctl.h                    |  18 +-
 21 files changed, 372 insertions(+), 271 deletions(-)