[PATCH for-5.0 v2 00/23] block: Fix check_to_replace_node()

[Max Reitz]

Based-on: <address@hidden>
(“iotests: Test failing mirror complete”)

(Because both add cases to 041.)


Hi,

For what this series does, see the cover letter of v1:

https://lists.nongnu.org/archive/html/qemu-block/2019-09/msg01027.html


Now, in v2 I’ve addressed Vladimir’s comments:
- Patch 5: Extend explanation in the commit message
- Patch 6: Prefer driver-specific .bdrv_recurse_can_replace()
           implementation before the generic one for filters
- Patch 8: Some more s/BdrvChild \*/QuorumChild/
- Patch 15: Fix typo in the commit message
- Patch 17: Added
- Patch 18:
  - Split @path into @root + @path
  - In one instance, use x = next(y, z) instead of
    try: x = next(y); except StopIteration: x = z;
  - %s/'''/"""/
- Patch 19: Fallout from the patch 18 changes
- Patch 20: Fix in the commit message (uncommenting -> commenting out)
- Patch 21:
  - Check full stderr message by inspecting the VM log
  - Fallout from the patch 18 changes
  - %s/'''/"""/
- Patch 22:
  - Skip case if COR is unsupported
  - Fallout from the patch 18 changes
  - %s/'''/"""/
- Patch 23:
  - Added more comments
  - Skip cases if throttle/COR/quorum (as appropriate) is unsupported
  - Use imgfmt instead of hard-coding qcow2
  - Fallout from the patch 18 changes
  - %s/'''/"""/


git-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

001/23:[----] [--] 'blockdev: Allow external snapshots everywhere'
002/23:[----] [--] 'blockdev: Allow resizing everywhere'
003/23:[----] [--] 'block: Drop bdrv_is_first_non_filter()'
004/23:[----] [--] 'iotests: Let 041 use -blockdev for quorum children'
005/23:[----] [--] 'quorum: Fix child permissions'
006/23:[0012] [FC] 'block: Add bdrv_recurse_can_replace()'
007/23:[----] [--] 'blkverify: Implement .bdrv_recurse_can_replace()'
008/23:[0006] [FC] 'quorum: Store children in own structure'
009/23:[----] [--] 'quorum: Add QuorumChild.to_be_replaced'
010/23:[----] [--] 'quorum: Implement .bdrv_recurse_can_replace()'
011/23:[----] [--] 'block: Use bdrv_recurse_can_replace()'
012/23:[----] [--] 'block: Remove bdrv_recurse_is_first_non_filter()'
013/23:[----] [--] 'mirror: Double-check immediately before replacing'
014/23:[----] [--] 'quorum: Stop marking it as a filter'
015/23:[----] [--] 'mirror: Prevent loops'
016/23:[----] [--] 'iotests: Use complete_and_wait() in 155'
017/23:[down] 'iotests: Use skip_if_unsupported decorator in 041'
018/23:[0037] [FC] 'iotests: Add VM.assert_block_path()'
019/23:[0004] [FC] 'iotests: Resolve TODOs in 041'
020/23:[----] [--] 'iotests: Use self.image_len in TestRepairQuorum'
021/23:[0027] [FC] 'iotests: Add tests for invalid Quorum @replaces'
022/23:[0007] [FC] 'iotests: Check that @replaces can replace filters'
023/23:[0141] [FC] 'iotests: Mirror must not attempt to create loops'


Max Reitz (23):
  blockdev: Allow external snapshots everywhere
  blockdev: Allow resizing everywhere
  block: Drop bdrv_is_first_non_filter()
  iotests: Let 041 use -blockdev for quorum children
  quorum: Fix child permissions
  block: Add bdrv_recurse_can_replace()
  blkverify: Implement .bdrv_recurse_can_replace()
  quorum: Store children in own structure
  quorum: Add QuorumChild.to_be_replaced
  quorum: Implement .bdrv_recurse_can_replace()
  block: Use bdrv_recurse_can_replace()
  block: Remove bdrv_recurse_is_first_non_filter()
  mirror: Double-check immediately before replacing
  quorum: Stop marking it as a filter
  mirror: Prevent loops
  iotests: Use complete_and_wait() in 155
  iotests: Use skip_if_unsupported decorator in 041
  iotests: Add VM.assert_block_path()
  iotests: Resolve TODOs in 041
  iotests: Use self.image_len in TestRepairQuorum
  iotests: Add tests for invalid Quorum @replaces
  iotests: Check that @replaces can replace filters
  iotests: Mirror must not attempt to create loops

 block.c                       | 115 ++++++----
 block/blkverify.c             |  20 +-
 block/copy-on-read.c          |   9 -
 block/mirror.c                |  31 ++-
 block/quorum.c                | 161 +++++++++++---
 block/replication.c           |   7 -
 block/throttle.c              |   8 -
 blockdev.c                    |  58 ++++-
 include/block/block.h         |   5 -
 include/block/block_int.h     |  19 +-
 tests/qemu-iotests/041        | 402 ++++++++++++++++++++++++++++++----
 tests/qemu-iotests/041.out    |   4 +-
 tests/qemu-iotests/155        |   7 +-
 tests/qemu-iotests/iotests.py |  59 +++++
 14 files changed, 715 insertions(+), 190 deletions(-)

-- 
2.23.0