diff options
| author | NeilBrown <neilb@suse.de> | 2007-09-11 15:23:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-09-11 17:21:19 -0700 |
| commit | a2e0855182e2be26b252745b2bb7558705cb0dd2 (patch) | |
| tree | d7a1457b1785cff5c018b37587ce2dbef159e83d | |
| parent | b70ae1d9f69ba52767af89f90fd79587669bc7ff (diff) | |
| download | linux-a2e0855182e2be26b252745b2bb7558705cb0dd2.tar.gz linux-a2e0855182e2be26b252745b2bb7558705cb0dd2.tar.bz2 linux-a2e0855182e2be26b252745b2bb7558705cb0dd2.zip | |
md: fix some bugs with growing raid5/raid6 arrays.
The recent changed to raid5 to allow offload of parity calculation etc
introduced some bugs in the code for growing (i.e. adding a disk to) raid5
and raid6. This fixes them
Acked-by: Dan Williams <dan.j.williams@intel.com>
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>
| -rw-r--r-- | drivers/md/raid5.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 2aff4be35dc4..4d63773ee73a 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -2541,7 +2541,7 @@ static void handle_stripe_expansion(raid5_conf_t *conf, struct stripe_head *sh, struct dma_async_tx_descriptor *tx = NULL; clear_bit(STRIPE_EXPAND_SOURCE, &sh->state); for (i = 0; i < sh->disks; i++) - if (i != sh->pd_idx && (r6s && i != r6s->qd_idx)) { + if (i != sh->pd_idx && (!r6s || i != r6s->qd_idx)) { int dd_idx, pd_idx, j; struct stripe_head *sh2; @@ -2574,7 +2574,8 @@ static void handle_stripe_expansion(raid5_conf_t *conf, struct stripe_head *sh, set_bit(R5_UPTODATE, &sh2->dev[dd_idx].flags); for (j = 0; j < conf->raid_disks; j++) if (j != sh2->pd_idx && - (r6s && j != r6s->qd_idx) && + (!r6s || j != raid6_next_disk(sh2->pd_idx, + sh2->disks)) && !test_bit(R5_Expanded, &sh2->dev[j].flags)) break; if (j == conf->raid_disks) { @@ -2583,12 +2584,12 @@ static void handle_stripe_expansion(raid5_conf_t *conf, struct stripe_head *sh, } release_stripe(sh2); - /* done submitting copies, wait for them to complete */ - if (i + 1 >= sh->disks) { - async_tx_ack(tx); - dma_wait_for_async_tx(tx); - } } + /* done submitting copies, wait for them to complete */ + if (tx) { + async_tx_ack(tx); + dma_wait_for_async_tx(tx); + } } /* @@ -2855,7 +2856,7 @@ static void handle_stripe5(struct stripe_head *sh) sh->disks = conf->raid_disks; sh->pd_idx = stripe_to_pdidx(sh->sector, conf, conf->raid_disks); - s.locked += handle_write_operations5(sh, 0, 1); + s.locked += handle_write_operations5(sh, 1, 1); } else if (s.expanded && !test_bit(STRIPE_OP_POSTXOR, &sh->ops.pending)) { clear_bit(STRIPE_EXPAND_READY, &sh->state); |