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authorNeilBrown <neilb@suse.de>2011-12-23 03:17:57 +0400
committerNeilBrown <neilb@suse.de>2011-12-23 03:17:57 +0400
commitc19d57980b38a5bb613a898937a1cf85f422fb9b (patch)
treeddc9f7ae53a4cd0464240ec8c49c03d35823a103 /drivers/md/raid1.c
parent8c7a2c2bcfaf0ee29c74437a4814d1aa780d6a26 (diff)
downloadlinux-c19d57980b38a5bb613a898937a1cf85f422fb9b.tar.xz
md/raid1: recognise replacements when assembling arrays.
If a Replacement is seen, file it as such. If we see two replacements (or two normal devices) for the one slot, abort. Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/raid1.c')
-rw-r--r--drivers/md/raid1.c25
1 files changed, 23 insertions, 2 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index f68075189df8..6df0c41578af 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2453,14 +2453,20 @@ static struct r1conf *setup_conf(struct mddev *mddev)
conf->poolinfo->mddev = mddev;
+ err = -EINVAL;
spin_lock_init(&conf->device_lock);
list_for_each_entry(rdev, &mddev->disks, same_set) {
int disk_idx = rdev->raid_disk;
if (disk_idx >= mddev->raid_disks
|| disk_idx < 0)
continue;
- disk = conf->mirrors + disk_idx;
+ if (test_bit(Replacement, &rdev->flags))
+ disk = conf->mirrors + conf->raid_disks + disk_idx;
+ else
+ disk = conf->mirrors + disk_idx;
+ if (disk->rdev)
+ goto abort;
disk->rdev = rdev;
disk->head_position = 0;
@@ -2476,11 +2482,27 @@ static struct r1conf *setup_conf(struct mddev *mddev)
conf->pending_count = 0;
conf->recovery_disabled = mddev->recovery_disabled - 1;
+ err = -EIO;
conf->last_used = -1;
for (i = 0; i < conf->raid_disks * 2; i++) {
disk = conf->mirrors + i;
+ if (i < conf->raid_disks &&
+ disk[conf->raid_disks].rdev) {
+ /* This slot has a replacement. */
+ if (!disk->rdev) {
+ /* No original, just make the replacement
+ * a recovering spare
+ */
+ disk->rdev =
+ disk[conf->raid_disks].rdev;
+ disk[conf->raid_disks].rdev = NULL;
+ } else if (!test_bit(In_sync, &disk->rdev->flags))
+ /* Original is not in_sync - bad */
+ goto abort;
+ }
+
if (!disk->rdev ||
!test_bit(In_sync, &disk->rdev->flags)) {
disk->head_position = 0;
@@ -2494,7 +2516,6 @@ static struct r1conf *setup_conf(struct mddev *mddev)
conf->last_used = i;
}
- err = -EIO;
if (conf->last_used < 0) {
printk(KERN_ERR "md/raid1:%s: no operational mirrors\n",
mdname(mddev));