[GIT PULL] Btrfs fixes for 6.1-rc4, part 2

[David Sterba <dsterba@suse.com>]

Hi,

a batch of error handling fixes for resource leaks, fixes for nowait
mode in combination with direct and buffered IO.  Please pull, thanks.

- direct IO + dsync + nowait could miss a sync of the file after write,
  add handling for this combination

- buffered IO + nowait should not fail with ENOSPC, only blocking IO
  could determine that

- error handling fixes
  - fix inode reserve space leak due to nowait buffered write
  - check the correct variable after allocation (direct IO submit)
  - fix inode list leak during backref walking
  - fix ulist freeing in self tests

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The following changes since commit 76a66ba101329316a5d7f4275070be22eb85fdf2:

  btrfs: don't use btrfs_chunk::sub_stripes from disk (2022-10-25 10:17:33 +0200)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-6.1-rc3-tag

for you to fetch changes up to eb81b682b131642405a05c627ab08cf0967b3dd8:

  btrfs: fix inode reserve space leak due to nowait buffered write (2022-11-02 17:44:45 +0100)

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Christophe JAILLET (1):
      btrfs: fix a memory allocation failure test in btrfs_submit_direct

Filipe Manana (7):
      btrfs: fix lost file sync on direct IO write with nowait and dsync iocb
      btrfs: fix inode list leak during backref walking at resolve_indirect_refs()
      btrfs: fix inode list leak during backref walking at find_parent_nodes()
      btrfs: fix ulist leaks in error paths of qgroup self tests
      btrfs: remove pointless and double ulist frees in error paths of qgroup tests
      btrfs: fix nowait buffered write returning -ENOSPC
      btrfs: fix inode reserve space leak due to nowait buffered write

 fs/btrfs/backref.c            | 54 +++++++++++++++++++++++++++----------------
 fs/btrfs/ctree.h              |  5 +++-
 fs/btrfs/file.c               | 29 +++++++++++++++++------
 fs/btrfs/inode.c              | 16 +++++++++----
 fs/btrfs/tests/qgroup-tests.c | 36 +++++++++++++++--------------
 5 files changed, 91 insertions(+), 49 deletions(-)