[GIT PULL] Btrfs updates for 5.12-rc2

[David Sterba <dsterba@suse.com>]

From: David Sterba <dsterba@suse.cz>

Hi,

first batch of fixes that usually arrive during the merge window code
freeze. Regressions and stable material. Please pull, thanks.

Regressions:

- fix deadlock in log sync in zoned mode

- fix bugs in subpage mode still wrongly assuming sectorsize == page
  size

Fixes:

- fix missing kunmap of the Q stripe in RAID6

- block group fixes:
  - fix race between extent freeing/allocation when using bitmaps
  - avoid double put of block group when emptying cluster

- swapfile fixes:
  - fix swapfile writes vs running scrub
  - fix swapfile activation vs snapshot creation

- fix stale data exposure after cloning a hole with NO_HOLES enabled

- remove tree-checker check that does not work in case information from
  other leaves is necessary

----------------------------------------------------------------
The following changes since commit 9d294a685fbcb256ce8c5f7fd88a7596d0f52a8a:

  btrfs: zoned: enable to mount ZONED incompat flag (2021-02-09 02:52:24 +0100)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-5.12-rc1-tag

for you to fetch changes up to 6e37d245994189ba757df7dc2950a44d31421ac6:

  btrfs: zoned: fix deadlock on log sync (2021-02-22 18:08:48 +0100)

----------------------------------------------------------------
Filipe Manana (4):
      btrfs: avoid checking for RO block group twice during nocow writeback
      btrfs: fix race between writes to swap files and scrub
      btrfs: fix race between swap file activation and snapshot creation
      btrfs: fix stale data exposure after cloning a hole with NO_HOLES enabled

Ira Weiny (1):
      btrfs: fix raid6 qstripe kmap

Johannes Thumshirn (1):
      btrfs: zoned: fix deadlock on log sync

Josef Bacik (2):
      btrfs: tree-checker: do not error out if extent ref hash doesn't match
      btrfs: avoid double put of block group when emptying cluster

Nikolay Borisov (1):
      btrfs: fix race between extent freeing/allocation when using bitmaps

Qu Wenruo (2):
      btrfs: make btrfs_submit_compressed_read() subpage compatible
      btrfs: make check_compressed_csum() to be subpage compatible

 fs/btrfs/block-group.c      | 33 +++++++++++++++++++++++-
 fs/btrfs/block-group.h      |  9 +++++++
 fs/btrfs/compression.c      | 62 +++++++++++++++++++++++++++++++--------------
 fs/btrfs/ctree.h            |  5 ++++
 fs/btrfs/free-space-cache.c | 14 +++++-----
 fs/btrfs/inode.c            | 44 +++++++++++++++++++++++++++-----
 fs/btrfs/raid56.c           | 21 ++++++++-------
 fs/btrfs/reflink.c          | 18 +++++++++++++
 fs/btrfs/scrub.c            |  9 ++++++-
 fs/btrfs/tree-checker.c     | 16 +++---------
 fs/btrfs/tree-log.c         |  3 ---
 11 files changed, 175 insertions(+), 59 deletions(-)