[dm-devel] [git pull] device mapper changes for 6.0

[Mike Snitzer <snitzer@kernel.org>]

Hi Linus,

Stephen had to deal with a couple trivial merge conflicts late in this
cycle, please see: https://lkml.org/lkml/2022/7/27/1819 and
https://lkml.org/lkml/2022/7/28/302

The following changes since commit 22d0c4080fe49299640d9d6c43154c49794c2825:

  block: simplify disk_set_independent_access_ranges (2022-06-29 08:36:46 -0600)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git tags/for-6.0/dm-changes

for you to fetch changes up to 9dd1cd3220eca534f2d47afad7ce85f4c40118d8:

  dm: fix dm-raid crash if md_handle_request() splits bio (2022-07-28 17:36:30 -0400)

Please pull, thanks.
Mike

----------------------------------------------------------------
- Refactor DM core's mempool allocation so that it clearer by not
  being split acorss files.

- Improve DM core's BLK_STS_DM_REQUEUE and BLK_STS_AGAIN handling.

- Optimize DM core's more common bio splitting by eliminating the use
  of bio cloning with bio_split+bio_chain. Shift that cloning cost to
  the relatively unlikely dm_io requeue case that only occurs during
  error handling. Introduces dm_io_rewind() that will clone a bio that
  reflects the subset of the original bio that must be requeued.

- Remove DM core's dm_table_get_num_targets() wrapper and audit all
  dm_table_get_target() callers.

- Fix potential for OOM with DM writecache target by setting a default
  MAX_WRITEBACK_JOBS (set to 256MiB or 1/16 of total system memory,
  whichever is smaller).

- Fix DM writecache target's stats that are reported through
  DM-specific table info.

- Fix use-after-free crash in dm_sm_register_threshold_callback().

- Refine DM core's Persistent Reservation handling in preparation for
  broader work Mike Christie is doing to add compatibility with
  Microsoft Windows Failover Cluster.

- Fix various KASAN reported bugs in the DM raid target.

- Fix DM raid target crash due to md_handle_request() bio splitting
  that recurses to block core without properly initializing the bio's
  bi_dev.

- Fix some code comment typos and fix some Documentation formatting.

----------------------------------------------------------------
Bagas Sanjaya (1):
      Documentation: dm writecache: Render status list as list

Christoph Hellwig (2):
      dm: unexport dm_get_reserved_rq_based_ios
      dm: refactor dm_md_mempool allocation

JeongHyeon Lee (1):
      dm verity: fix checkpatch close brace error

Jiang Jian (1):
      dm raid: remove redundant "the" in parse_raid_params() comment

Luo Meng (1):
      dm thin: fix use-after-free crash in dm_sm_register_threshold_callback

Mauro Carvalho Chehab (1):
      Documentation: dm writecache: add blank line before optional parameters

Mike Christie (4):
      dm: Allow dm_call_pr to be used for path searches
      dm: Start pr_reserve from the same starting path
      dm: Fix PR release handling for non All Registrants
      dm: Start pr_preempt from the same starting path

Mike Snitzer (5):
      dm table: remove dm_table_get_num_targets() wrapper
      dm table: audit all dm_table_get_target() callers
      dm table: rename dm_target variable in dm_table_add_target()
      dm: return early from dm_pr_call() if DM device is suspended
      dm: fix dm-raid crash if md_handle_request() splits bio

Mikulas Patocka (8):
      dm writecache: set a default MAX_WRITEBACK_JOBS
      dm kcopyd: use __GFP_HIGHMEM when allocating pages
      dm writecache: return void from functions
      dm writecache: count number of blocks read, not number of read bios
      dm writecache: count number of blocks written, not number of write bios
      dm writecache: count number of blocks discarded, not number of discard bios
      dm raid: fix address sanitizer warning in raid_status
      dm raid: fix address sanitizer warning in raid_resume

Ming Lei (3):
      dm: improve BLK_STS_DM_REQUEUE and BLK_STS_AGAIN handling
      dm: add dm_bio_rewind() API to DM core
      dm: add two stage requeue mechanism

Steven Lung (1):
      dm cache: fix typo in 2 comment blocks

Zhang Jiaming (1):
      dm snapshot: fix typo in snapshot_map() comment

 .../admin-guide/device-mapper/writecache.rst       |  18 +-
 drivers/md/Makefile                                |   2 +-
 drivers/md/dm-cache-metadata.h                     |   2 +-
 drivers/md/dm-cache-target.c                       |   2 +-
 drivers/md/dm-core.h                               |  23 +-
 drivers/md/dm-ima.c                                |   5 +-
 drivers/md/dm-io-rewind.c                          | 166 ++++++++
 drivers/md/dm-ioctl.c                              |   6 +-
 drivers/md/dm-kcopyd.c                             |   2 +-
 drivers/md/dm-raid.c                               |   7 +-
 drivers/md/dm-rq.c                                 |   1 -
 drivers/md/dm-snap.c                               |   2 +-
 drivers/md/dm-table.c                              | 318 +++++++-------
 drivers/md/dm-thin-metadata.c                      |   7 +-
 drivers/md/dm-thin.c                               |   4 +-
 drivers/md/dm-verity-target.c                      |   7 +-
 drivers/md/dm-writecache.c                         |  43 +-
 drivers/md/dm-zone.c                               |   7 +-
 drivers/md/dm.c                                    | 462 +++++++++++++--------
 drivers/md/dm.h                                    |   4 -
 include/linux/device-mapper.h                      |   7 +-
 include/uapi/linux/dm-ioctl.h                      |   4 +-
 22 files changed, 694 insertions(+), 405 deletions(-)
 create mode 100644 drivers/md/dm-io-rewind.c

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