Btrfs: scrub raid56 stripes in the right way

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Steps to reproduce:
 # mkfs.btrfs -f /dev/sda[8-11] -m raid5 -d raid5
 # mount /dev/sda8 /mnt
 # btrfs scrub start -BR /mnt
 # echo $? <--unverified errors make return value be 3

This is because we don't setup right mapping between physical
and logical address for raid56, which makes checksum mismatch.
But we will find everthing is fine later when rechecking using
btrfs_map_block().

This patch fixed the problem by settuping right mappings and
we only verify data stripes' checksums.

Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>

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This commit is contained in:

Wang Shilong 2014-04-01 18:01:43 +08:00 • committed by Chris Mason

parent 68bb462d42

commit 3b080b2564

1 changed files with 89 additions and 19 deletions

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fs/btrfs/scrub.c

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