This is an attempt to fix a raid6 bug, that is, if two disks got hotplugged at run time, reconstruction process is not able to rebuild correct data to use even if raid6 can theoretically tolerate two disk failure.
Patch 1 is a preparation patch, which introduces the necessary flags and flag handling. More details about the above bug can be found in Patch 2. Patch 3 applies flags to raid1/10 profile. Patch 4 fixes btrfs to show flags for each device correctly. A test case[1] for fstests has been sent out. [1]: fstests: btrfs: add test case for raid6 reconstruction bug https://patchwork.kernel.org/patch/10037769/ Liu Bo (4): Btrfs: introduce device flags Btrfs: fix data corruption in raid6 Btrfs: make raid1 and raid10 be aware of device flag In_sync Btrfs: change how we set In_sync fs/btrfs/disk-io.c | 21 ++++++++++++++++- fs/btrfs/raid56.c | 3 ++- fs/btrfs/volumes.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++-------- fs/btrfs/volumes.h | 8 +++++++ 4 files changed, 88 insertions(+), 12 deletions(-) -- 2.9.4 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
