diff options
| author | NeilBrown <neilb@suse.de> | 2007-06-16 10:16:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-06-16 13:16:15 -0700 |
| commit | af03b8e4e81c3789e597632268940edd11ffe870 (patch) | |
| tree | bf161f88b6d9dbdd484366b9640b500617db5ab3 /drivers/md | |
| parent | edad01e2a1c527af3baf22dc6977aeb058881150 (diff) | |
| download | kernel-crypto-af03b8e4e81c3789e597632268940edd11ffe870.tar.gz kernel-crypto-af03b8e4e81c3789e597632268940edd11ffe870.tar.xz kernel-crypto-af03b8e4e81c3789e597632268940edd11ffe870.zip | |
md: fix two raid10 bugs
1/ When resyncing a degraded raid10 which has more than 2 copies of each block,
garbage can get synced on top of good data.
2/ We round the wrong way in part of the device size calculation, which
can cause confusion.
Signed-off-by: Neil Brown <neilb@suse.de>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/raid10.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 82249a69014..9eb66c1b523 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -1867,6 +1867,7 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i int d = r10_bio->devs[i].devnum; bio = r10_bio->devs[i].bio; bio->bi_end_io = NULL; + clear_bit(BIO_UPTODATE, &bio->bi_flags); if (conf->mirrors[d].rdev == NULL || test_bit(Faulty, &conf->mirrors[d].rdev->flags)) continue; @@ -2037,6 +2038,11 @@ static int run(mddev_t *mddev) /* 'size' is now the number of chunks in the array */ /* calculate "used chunks per device" in 'stride' */ stride = size * conf->copies; + + /* We need to round up when dividing by raid_disks to + * get the stride size. + */ + stride += conf->raid_disks - 1; sector_div(stride, conf->raid_disks); mddev->size = stride << (conf->chunk_shift-1); |