[Qemu-block] [PATCH for-4.0 v2 0/3] freeze the backing chain earlier in stream_start()

[Alberto Garcia]

Hi,

this series fixes the bug that I found the other day and described here:

   https://lists.gnu.org/archive/html/qemu-block/2019-03/msg00764.html
   https://lists.gnu.org/archive/html/qemu-block/2019-03/msg00791.html

Patch 2 is the important one, patch 3 is a test case, and patch 1 will
allow us to detect this kind of errors earlier.

Regards,

Berto

v2:
- Patch 2: Change the rollback order [Vladimir]
- Patch 3: Use self.wait_until_completed() [Vladimir]

v1: https://lists.gnu.org/archive/html/qemu-block/2019-03/msg00851.html
- Initial version

Output of backport-diff against v1:

Key:
[----] : patches are identical
[####] : number of functional differences between upstream/downstream patch
[down] : patch is downstream-only
The flags [FC] indicate (F)unctional and (C)ontextual differences, respectively

001/3:[----] [--] 'block: continue until base is found in 
bdrv_freeze_backing_chain() et al'
002/3:[----] [-C] 'block: freeze the backing chain earlier in stream_start()'
003/3:[0017] [FC] 'block: test block-stream with a base node that is used by 
block-commit'

Alberto Garcia (3):
  block: continue until base is found in bdrv_freeze_backing_chain() et
    al
  block: freeze the backing chain earlier in stream_start()
  block: test block-stream with a base node that is used by block-commit

 block.c                    | 21 ++++++++++++++-------
 block/stream.c             | 13 +++++++------
 tests/qemu-iotests/030     | 17 +++++++++++++++++
 tests/qemu-iotests/030.out |  4 ++--
 4 files changed, 40 insertions(+), 15 deletions(-)

-- 
2.11.0