[git pull] device mapper changes for 5.3

[Mike Snitzer <snitzer@redhat.com>]

Hi Linus,

Merging these DM changes will require manual conflict resolution in the
snapshot target's Documentation updates due to conflicts with the
shotgun blast of RST changes to DM documentation that I didn't ack but
got in anyway -- clearly the RST Documentation train brakes for nobody ;)
Feel free to have a look at the test merge I did in the linux-dm.git
'dm-5.3-merge' branch.

Also, you'll note that the last 2 commits of this pull were rebased
today; I did that because the dm-bufio fix's commit header needed a lot
of grammar fixes and was also missing the stable@vger.kernel.org Cc.

The following changes since commit 2eba4e640b2c4161e31ae20090a53ee02a518657:

  dm verity: use message limit for data block corruption message (2019-06-25 14:09:14 -0400)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git tags/for-5.3/dm-changes

for you to fetch changes up to bd293d071ffe65e645b4d8104f9d8fe15ea13862:

  dm bufio: fix deadlock with loop device (2019-07-12 09:59:37 -0400)

Please pull, thanks!
Mike

----------------------------------------------------------------
- Add encrypted byte-offset initialization vector (eboiv) to DM crypt.

- Add optional discard features to DM snapshot which allow freeing space
  from a DM device whose free space was exhausted.

- Various small improvements to use struct_size() and kzalloc().

- Fix to check if DM thin metadata is in fail_io mode before attempting
  to update the superblock to set the needs_check flag.  Otherwise the
  DM thin-pool can hang.

- Fix DM bufio shrinker's potential for ABBA recursion deadlock with DM
  thin provisioning on loop usecase.

----------------------------------------------------------------
Fuqian Huang (1):
      dm integrity: use kzalloc() instead of kmalloc() + memset()

Junxiao Bi (1):
      dm bufio: fix deadlock with loop device

Mike Snitzer (2):
      dm thin metadata: check if in fail_io mode when setting needs_check
      dm snapshot: add optional discard support features

Milan Broz (4):
      dm integrity: always set version on superblock update
      dm crypt: wipe private IV struct after key invalid flag is set
      dm crypt: remove obsolete comment about plumb IV
      dm crypt: implement eboiv - encrypted byte-offset initialization vector

Pavel Begunkov (1):
      dm: update stale comment in end_clone_bio()

Qu Wenruo (1):
      dm log writes: fix incorrect comment about the logged sequence example

Zhengyuan Liu (2):
      dm crypt: use struct_size() when allocating encryption context
      dm log writes: use struct_size() to calculate size of pending_block

 Documentation/device-mapper/snapshot.txt |  16 +++
 drivers/md/dm-bufio.c                    |   4 +-
 drivers/md/dm-crypt.c                    | 101 +++++++++++++++--
 drivers/md/dm-integrity.c                |   7 +-
 drivers/md/dm-log-writes.c               |   4 +-
 drivers/md/dm-rq.c                       |   2 +-
 drivers/md/dm-snap.c                     | 186 +++++++++++++++++++++++++++----
 drivers/md/dm-thin-metadata.c            |   7 +-
 8 files changed, 284 insertions(+), 43 deletions(-)