This patchset can be fetched from my github repo:
https://github.com/adam900710/linux.git raid56_fixes
It's based on v4.10-rc6 and none of the patch is modified after its first
appearance in mail list.
The patchset fixes the following bugs:
1) False alert or wrong csum error number when scrubbing RAID5/6
The bug itself won't cause any damage to fs, just pure race.
2) Corrupted data stripe rebuild corrupts P/Q
So scrub makes one error into another, not really fixing anything
3) Use-after-free caused by cancelling dev-replace
This is quite a deadly bug, since cancelling dev-replace can easily
cause kernel panic, and thanks to raid bio steal, it makes the race
windows quite large.
Can be triggered by btrfs/069.
After all the fixes applied, no scrub/replace related regression can be
detected.
Qu Wenruo (5):
btrfs: scrub: Introduce full stripe lock for RAID56
btrfs: scrub: Fix RAID56 recovery race condition
btrfs: raid56: Use correct stolen pages to calculate P/Q
btrfs: raid56: Don't keep rbio for later steal
btrfs: replace: Use ref counts to avoid destroying target device when
canceled
fs/btrfs/ctree.h | 4 ++
fs/btrfs/dev-replace.c | 7 +-
fs/btrfs/extent-tree.c | 3 +
fs/btrfs/raid56.c | 80 +++++++++++++++------
fs/btrfs/scrub.c | 192 +++++++++++++++++++++++++++++++++++++++++++++++++
fs/btrfs/volumes.c | 36 +++++++++-
fs/btrfs/volumes.h | 10 +++
7 files changed, 309 insertions(+), 23 deletions(-)
--
2.11.0
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