[GIT PULL] Btrfs fixes for 5.11-rc3

[David Sterba]

Hi,

a few more fixes that arrived before the end of the year.  Please pull,
thanks.

- a bunch of fixes related to transaction handle lifetime wrt various
  operations (umount, remount, qgroup scan, orphan cleanup)

- async discard scheduling fixes

- fix item size calculation when item keys collide for extend refs
  (hardlinks)

- fix qgroup flushing from running transaction

- fix send, wrong file path when there is an inode with a pending rmdir

- fix deadlock when cloning inline extent and low on free metadata space

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The following changes since commit b42fe98c92698d2a10094997e5f4d2dd968fd44f:

  btrfs: scrub: allow scrub to work with subpage sectorsize (2020-12-09 19:16:11 +0100)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-5.11-rc2-tag

for you to fetch changes up to a8cc263eb58ca133617662a5a5e07131d0ebf299:

  btrfs: run delayed iputs when remounting RO to avoid leaking them (2020-12-18 15:00:08 +0100)

----------------------------------------------------------------
Filipe Manana (7):
      btrfs: fix deadlock when cloning inline extent and low on free metadata space
      btrfs: send: fix wrong file path when there is an inode with a pending rmdir
      btrfs: fix transaction leak and crash after RO remount caused by qgroup rescan
      btrfs: fix transaction leak and crash after cleaning up orphans on RO mount
      btrfs: fix race between RO remount and the cleaner task
      btrfs: add assertion for empty list of transactions at late stage of umount
      btrfs: run delayed iputs when remounting RO to avoid leaking them

Josef Bacik (1):
      btrfs: tests: initialize test inodes location

Pavel Begunkov (3):
      btrfs: fix async discard stall
      btrfs: fix racy access to discard_ctl data
      btrfs: merge critical sections of discard lock in workfn

Qu Wenruo (1):
      btrfs: qgroup: don't try to wait flushing if we're already holding a transaction

ethanwu (1):
      btrfs: correctly calculate item size used when item key collision happens

 fs/btrfs/btrfs_inode.h       |  9 ++++++
 fs/btrfs/ctree.c             | 24 +++++++++++++--
 fs/btrfs/ctree.h             | 29 ++++++++++++++++--
 fs/btrfs/dev-replace.c       |  2 +-
 fs/btrfs/discard.c           | 70 +++++++++++++++++++++++---------------------
 fs/btrfs/disk-io.c           | 13 ++++----
 fs/btrfs/extent-tree.c       |  2 ++
 fs/btrfs/file-item.c         |  2 ++
 fs/btrfs/inode.c             | 15 +++++++---
 fs/btrfs/ioctl.c             |  2 +-
 fs/btrfs/qgroup.c            | 43 +++++++++++++++++++--------
 fs/btrfs/reflink.c           | 15 ++++++++++
 fs/btrfs/send.c              | 49 +++++++++++++++++++------------
 fs/btrfs/space-info.c        |  2 +-
 fs/btrfs/super.c             | 40 +++++++++++++++++++++++--
 fs/btrfs/tests/btrfs-tests.c | 10 +++++--
 fs/btrfs/tests/inode-tests.c |  9 ------
 fs/btrfs/volumes.c           |  4 +--
 18 files changed, 243 insertions(+), 97 deletions(-)