[GIT PULL] Btrfs fixes for 5.12-rc4

[David Sterba <dsterba@suse.com>]

From: David Sterba <dsterba@suse.cz>

Hi,

there are still regressions being found and fixed in the zoned mode and
subpage code, the rest are fixes for bugs reported by users. Please
pull, thanks.

Regressions:

- subpage block support:
  - readahead works on the proper block size
  - fix last page zeroing

- zoned mode:
  - linked list corruption for tree log

Fixes:

- qgroup leak after falloc faiulre

- tree mod log and backref resolving
  - extent buffer cloning race when resolving backrefs
  - pin deleted leaves with active tree mod log users

- drop debugging flag from slab cache

----------------------------------------------------------------
The following changes since commit badae9c86979c459bd7d895d6d7ddc7a01131ff7:

  btrfs: zoned: do not account freed region of read-only block group as zone_unusable (2021-03-04 16:16:58 +0100)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-5.12-rc3-tag

for you to fetch changes up to 485df75554257e883d0ce39bb886e8212349748e:

  btrfs: always pin deleted leaves when there are active tree mod log users (2021-03-16 20:32:22 +0100)

----------------------------------------------------------------
David Sterba (1):
      btrfs: fix slab cache flags for free space tree bitmap

Filipe Manana (3):
      btrfs: zoned: fix linked list corruption after log root tree allocation failure
      btrfs: fix race when cloning extent buffer during rewind of an old root
      btrfs: always pin deleted leaves when there are active tree mod log users

Qu Wenruo (5):
      btrfs: fix wrong offset to zero out range beyond i_size
      btrfs: track qgroup released data in own variable in insert_prealloc_file_extent
      btrfs: fix qgroup data rsv leak caused by falloc failure
      btrfs: subpage: fix wild pointer access during metadata read failure
      btrfs: subpage: make readahead work properly

 fs/btrfs/ctree.c       |  2 ++
 fs/btrfs/extent-tree.c | 23 ++++++++++++++++++++++-
 fs/btrfs/extent_io.c   | 33 +++++++++++++++++++++++++++++++--
 fs/btrfs/inode.c       | 37 ++++++++++++++++++++++++++-----------
 fs/btrfs/reada.c       | 35 ++++++++++++++++++-----------------
 fs/btrfs/tree-log.c    |  8 ++++----
 6 files changed, 103 insertions(+), 35 deletions(-)