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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
commit8c7a2c2bcfaf0ee29c74437a4814d1aa780d6a26 (patch)
tree74093a74ea43965f04502bc5d71b6976a74c7305 /drivers/md
parentb014f14c81bc5db4e40e2a4db10998fd79c1c64c (diff)
downloadlinux-8c7a2c2bcfaf0ee29c74437a4814d1aa780d6a26.tar.xz
md/raid1: handle activation of replacement device when recovery completes.
When recovery completes ->spare_active is called. This checks if the replacement is ready and if so it fails the original. Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/raid1.c36
1 files changed, 33 insertions, 3 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 3d9aa0c92821..f68075189df8 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1265,6 +1265,25 @@ static int raid1_spare_active(struct mddev *mddev)
*/
for (i = 0; i < conf->raid_disks; i++) {
struct md_rdev *rdev = conf->mirrors[i].rdev;
+ struct md_rdev *repl = conf->mirrors[conf->raid_disks + i].rdev;
+ if (repl
+ && repl->recovery_offset == MaxSector
+ && !test_bit(Faulty, &repl->flags)
+ && !test_and_set_bit(In_sync, &repl->flags)) {
+ /* replacement has just become active */
+ if (!rdev ||
+ !test_and_clear_bit(In_sync, &rdev->flags))
+ count++;
+ if (rdev) {
+ /* Replaced device not technically
+ * faulty, but we need to be sure
+ * it gets removed and never re-added
+ */
+ set_bit(Faulty, &rdev->flags);
+ sysfs_notify_dirent_safe(
+ rdev->sysfs_state);
+ }
+ }
if (rdev
&& !test_bit(Faulty, &rdev->flags)
&& !test_and_set_bit(In_sync, &rdev->flags)) {
@@ -1362,10 +1381,21 @@ static int raid1_remove_disk(struct mddev *mddev, struct md_rdev *rdev)
err = -EBUSY;
p->rdev = rdev;
goto abort;
- } else {
- clear_bit(Replacement, &rdev->flags);
+ } else if (conf->mirrors[conf->raid_disks + number].rdev) {
+ /* We just removed a device that is being replaced.
+ * Move down the replacement. We drain all IO before
+ * doing this to avoid confusion.
+ */
+ struct md_rdev *repl =
+ conf->mirrors[conf->raid_disks + number].rdev;
+ raise_barrier(conf);
+ clear_bit(Replacement, &repl->flags);
+ p->rdev = repl;
+ conf->mirrors[conf->raid_disks + number].rdev = NULL;
+ lower_barrier(conf);
+ clear_bit(WantReplacement, &rdev->flags);
+ } else
clear_bit(WantReplacement, &rdev->flags);
- }
err = md_integrity_register(mddev);
}
abort: