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| author | NeilBrown <neilb@suse.de> | 2011-12-23 09:57:00 +1100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2011-12-23 09:57:00 +1100 |
| commit | 30d7a4836847bdb10b32c78a4879d4aebe0f193b (patch) | |
| tree | 039d4eaec57d67cbfc49d92f12e592b46c251c01 /drivers/md | |
| parent | 09cd9270ea52e0f9851528e8ed028073f96b3c34 (diff) | |
| download | linux-30d7a4836847bdb10b32c78a4879d4aebe0f193b.tar.gz linux-30d7a4836847bdb10b32c78a4879d4aebe0f193b.tar.bz2 linux-30d7a4836847bdb10b32c78a4879d4aebe0f193b.zip | |
md/raid5: ensure correct assessment of drives during degraded reshape.
While reshaping a degraded array (as when reshaping a RAID0 by first
converting it to a degraded RAID4) we currently get confused about
which devices are in_sync. In most cases we get it right, but in the
region that is being reshaped we need to treat non-failed devices as
in-sync when we have the data but haven't actually written it out yet.
Reported-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/raid5.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 31670f8d6b65..858fdbb7eb07 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -3065,11 +3065,17 @@ static void analyse_stripe(struct stripe_head *sh, struct stripe_head_state *s) } } else if (test_bit(In_sync, &rdev->flags)) set_bit(R5_Insync, &dev->flags); - else { + else if (sh->sector + STRIPE_SECTORS <= rdev->recovery_offset) /* in sync if before recovery_offset */ - if (sh->sector + STRIPE_SECTORS <= rdev->recovery_offset) - set_bit(R5_Insync, &dev->flags); - } + set_bit(R5_Insync, &dev->flags); + else if (test_bit(R5_UPTODATE, &dev->flags) && + test_bit(R5_Expanded, &dev->flags)) + /* If we've reshaped into here, we assume it is Insync. + * We will shortly update recovery_offset to make + * it official. + */ + set_bit(R5_Insync, &dev->flags); + if (rdev && test_bit(R5_WriteError, &dev->flags)) { clear_bit(R5_Insync, &dev->flags); if (!test_bit(Faulty, &rdev->flags)) { |