[GIT PULL] Btrfs fixes for 5.14-rc2

[David Sterba <dsterba@suse.com>]

Hi,

please pull the following fixes, all are for the zoned mode support.
Thanks.

- fix deadlock when allocating system chunk

- fix wrong mutex unlock on an error path

- fix extent map splitting for append operation

- update and fix message reporting unusable chunk space

- don't block when background zone reclaim runs with balance in parallel

----------------------------------------------------------------
The following changes since commit 629e33a16809ae0274e1f5fc3d22b92b9bd0fdf1:

  btrfs: remove unused btrfs_fs_info::total_pinned (2021-06-22 19:58:26 +0200)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-5.14-rc1-tag

for you to fetch changes up to ea32af47f00a046a1f953370514d6d946efe0152:

  btrfs: zoned: fix wrong mutex unlock on failure to allocate log root tree (2021-07-07 18:27:44 +0200)

----------------------------------------------------------------
David Sterba (1):
      btrfs: zoned: fix types for u64 division in btrfs_reclaim_bgs_work

Filipe Manana (3):
      btrfs: fix deadlock with concurrent chunk allocations involving system chunks
      btrfs: rework chunk allocation to avoid exhaustion of the system chunk array
      btrfs: zoned: fix wrong mutex unlock on failure to allocate log root tree

Johannes Thumshirn (2):
      btrfs: zoned: print unusable percentage when reclaiming block groups
      btrfs: don't block if we can't acquire the reclaim lock

Naohiro Aota (1):
      btrfs: properly split extent_map for REQ_OP_ZONE_APPEND

 fs/btrfs/block-group.c | 367 ++++++++++++++++++++++++++++++++++++-------------
 fs/btrfs/block-group.h |   6 +-
 fs/btrfs/ctree.c       |  67 ++-------
 fs/btrfs/inode.c       | 147 ++++++++++++++++----
 fs/btrfs/transaction.c |  15 +-
 fs/btrfs/transaction.h |   9 +-
 fs/btrfs/tree-log.c    |   2 +-
 fs/btrfs/volumes.c     | 355 +++++++++++++++++++++++++++++++++++------------
 fs/btrfs/volumes.h     |   5 +-
 9 files changed, 687 insertions(+), 286 deletions(-)