[GIT PULL] Btrfs fixes for 5.0-rc2

[David Sterba]

Hi,

please pull the following branch to get:

- 2 regression fixes in clone/dedupe ioctls, the generic check callback
  needs to lock extents properly and wait for io to avoid problems with
  writeback and relocation

- fix deadlock when using free space tree due to block group creation

- a recently added check refuses a valid fileystem with seeding device,
  make that work again with a quickfix, proper solution needs more
  intrusive changes

Thanks.

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The following changes since commit 52042d8e82ff50d40e76a275ac0b97aa663328b0:

  btrfs: Fix typos in comments and strings (2018-12-17 14:51:50 +0100)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-5.0-rc1-tag

for you to fetch changes up to 1b3922a8bc74231f9a767d1be6d9a061a4d4eeab:

  btrfs: Use real device structure to verify dev extent (2019-01-10 17:13:00 +0100)

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Filipe Manana (3):
      Btrfs: fix race between cloning range ending at eof and writeback
      Btrfs: fix race between reflink/dedupe and relocation
      Btrfs: fix deadlock when using free space tree due to block group creation

Qu Wenruo (1):
      btrfs: Use real device structure to verify dev extent

 fs/btrfs/ctree.c   | 16 +++++++++-------
 fs/btrfs/ioctl.c   | 49 +++++++++++++++++++++++++++++++++++++++++++------
 fs/btrfs/volumes.c | 12 ++++++++++++
 3 files changed, 64 insertions(+), 13 deletions(-)