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| author | Jan Schmidt <list.btrfs@jan-o-sch.net> | 2011-06-13 19:56:54 +0200 |
|---|---|---|
| committer | Jan Schmidt <list.btrfs@jan-o-sch.net> | 2011-09-29 12:54:28 +0200 |
| commit | 193ea74b2729e6ddc08fb6bde6e15a3bd4d94071 (patch) | |
| tree | 39891ccdd556360ce016171ae18a7474dd293aeb /fs | |
| parent | 558540c17771eaf89b1a3be39aa2c8bc837da1a6 (diff) | |
| download | linux-193ea74b2729e6ddc08fb6bde6e15a3bd4d94071.tar.gz linux-193ea74b2729e6ddc08fb6bde6e15a3bd4d94071.tar.bz2 linux-193ea74b2729e6ddc08fb6bde6e15a3bd4d94071.zip | |
btrfs scrub: bugfix: mirror_num off by one
Fix the mirror_num determination in scrub_stripe. The rest of the scrub code
did not use mirror_num for anything important and that error went unnoticed.
The nodatasum fixup patch of this set depends on a correct mirror_num.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/scrub.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index 221fd5c48736..59caf8fcd1c7 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -452,7 +452,7 @@ static void scrub_fixup(struct scrub_bio *sbio, int ix) * first find a good copy */ for (i = 0; i < multi->num_stripes; ++i) { - if (i == sbio->spag[ix].mirror_num) + if (i + 1 == sbio->spag[ix].mirror_num) continue; if (scrub_fixup_io(READ, multi->stripes[i].dev->bdev, @@ -930,21 +930,21 @@ static noinline_for_stack int scrub_stripe(struct scrub_dev *sdev, if (map->type & BTRFS_BLOCK_GROUP_RAID0) { offset = map->stripe_len * num; increment = map->stripe_len * map->num_stripes; - mirror_num = 0; + mirror_num = 1; } else if (map->type & BTRFS_BLOCK_GROUP_RAID10) { int factor = map->num_stripes / map->sub_stripes; offset = map->stripe_len * (num / map->sub_stripes); increment = map->stripe_len * factor; - mirror_num = num % map->sub_stripes; + mirror_num = num % map->sub_stripes + 1; } else if (map->type & BTRFS_BLOCK_GROUP_RAID1) { increment = map->stripe_len; - mirror_num = num % map->num_stripes; + mirror_num = num % map->num_stripes + 1; } else if (map->type & BTRFS_BLOCK_GROUP_DUP) { increment = map->stripe_len; - mirror_num = num % map->num_stripes; + mirror_num = num % map->num_stripes + 1; } else { increment = map->stripe_len; - mirror_num = 0; + mirror_num = 1; } path = btrfs_alloc_path(); |