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| author | NeilBrown <neilb@suse.de> | 2007-03-05 00:30:44 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-03-05 07:57:53 -0800 |
| commit | 6d3baf2eb8bd680b2d4f509bc3dbf4dcd6e27a40 (patch) | |
| tree | bb76dd97b16812efa78f546e08d11bd7ed6eefc7 /drivers/md/raid5.c | |
| parent | c6b36e9a3c57b73c7a6bdf787baa55f21195bba9 (diff) | |
| download | lwn-6d3baf2eb8bd680b2d4f509bc3dbf4dcd6e27a40.tar.gz lwn-6d3baf2eb8bd680b2d4f509bc3dbf4dcd6e27a40.zip | |
[PATCH] md: fix for raid6 reshape
Recent patch for raid6 reshape had a change missing that showed up in
subsequent review.
Many places in the raid5 code used "conf->raid_disks-1" to mean "number of
data disks". With raid6 that had to be changed to "conf->raid_disk -
conf->max_degraded" or similar. One place was missed.
This bug means that if a raid6 reshape were aborted in the middle the
recorded position would be wrong. On restart it would either fail (as the
position wasn't on an appropriate boundary) or would leave a section of the
array unreshaped, causing data corruption.
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/md/raid5.c')
| -rw-r--r-- | drivers/md/raid5.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index d247429ee5ef..54a1ad5eef42 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -3071,7 +3071,7 @@ static sector_t reshape_request(mddev_t *mddev, sector_t sector_nr, int *skipped release_stripe(sh); } spin_lock_irq(&conf->device_lock); - conf->expand_progress = (sector_nr + i)*(conf->raid_disks-1); + conf->expand_progress = (sector_nr + i) * new_data_disks; spin_unlock_irq(&conf->device_lock); /* Ok, those stripe are ready. We can start scheduling * reads on the source stripes. |