3.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Lukasz Dorau <lukasz.dorau@xxxxxxxxx>
commit 61e4947c99c4494336254ec540c50186d186150b upstream.
Since:
commit 7ceb17e87bde79d285a8b988cfed9eaeebe60b86
md: Allow devices to be re-added to a read-only array.
spares are activated on a read-only array. In case of raid1 and raid10
personalities it causes that not-in-sync devices are marked in-sync
without checking if recovery has been finished.
If a read-only array is degraded and one of its devices is not in-sync
(because the array has been only partially recovered) recovery will be skipped.
This patch adds checking if recovery has been finished before marking a device
in-sync for raid1 and raid10 personalities. In case of raid5 personality
such condition is already present (at raid5.c:6029).
Bug was introduced in 3.10 and causes data corruption.
Signed-off-by: Pawel Baldysiak <pawel.baldysiak@xxxxxxxxx>
Signed-off-by: Lukasz Dorau <lukasz.dorau@xxxxxxxxx>
Signed-off-by: NeilBrown <neilb@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/raid1.c | 1 +
drivers/md/raid10.c | 1 +
2 files changed, 2 insertions(+)
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1357,6 +1357,7 @@ static int raid1_spare_active(struct mdd
}
}
if (rdev
+ && rdev->recovery_offset == MaxSector
&& !test_bit(Faulty, &rdev->flags)
&& !test_and_set_bit(In_sync, &rdev->flags)) {
count++;
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1534,6 +1534,7 @@ static int raid10_spare_active(struct md
}
sysfs_notify_dirent_safe(tmp->replacement->sysfs_state);
} else if (tmp->rdev
+ && tmp->rdev->recovery_offset == MaxSector
&& !test_bit(Faulty, &tmp->rdev->flags)
&& !test_and_set_bit(In_sync, &tmp->rdev->flags)) {
count++;
--
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