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| author | NeilBrown <neilb@suse.com> | 2015-10-31 03:00:56 +0300 |
|---|---|---|
| committer | NeilBrown <neilb@suse.com> | 2015-10-31 03:00:56 +0300 |
| commit | d01552a76d71f9879af448e9142389ee9be6e95b (patch) | |
| tree | 8d3ebdd4404f8c922a436e02adfa0fdf8aad716a /drivers | |
| parent | b8a9d66d043ffac116100775a469f05f5158c16f (diff) | |
| download | linux-d01552a76d71f9879af448e9142389ee9be6e95b.tar.xz | |
Revert "md: allow a partially recovered device to be hot-added to an array."
This reverts commit 7eb418851f3278de67126ea0c427641ab4792c57.
This commit is poorly justified, I can find not discusison in email,
and it clearly causes a problem.
If a device which is being recovered fails and is subsequently
re-added to an array, there could easily have been changes to the
array *before* the point where the recovery was up to. So the
recovery must start again from the beginning.
If a spare is being recovered and fails, then when it is re-added we
really should do a bitmap-based recovery up to the recovery-offset,
and then a full recovery from there. Before this reversion, we only
did the "full recovery from there" which is not corect. After this
reversion with will do a full recovery from the start, which is safer
but not ideal.
It will be left to a future patch to arrange the two different styles
of recovery.
Reported-and-tested-by: Nate Dailey <nate.dailey@stratus.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Cc: stable@vger.kernel.org (3.14+)
Fixes: 7eb418851f32 ("md: allow a partially recovered device to be hot-added to an array.")
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/md.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index c702de18207a..3fe3d04a968a 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -8040,8 +8040,7 @@ static int remove_and_add_spares(struct mddev *mddev, !test_bit(Bitmap_sync, &rdev->flags))) continue; - if (rdev->saved_raid_disk < 0) - rdev->recovery_offset = 0; + rdev->recovery_offset = 0; if (mddev->pers-> hot_add_disk(mddev, rdev) == 0) { if (sysfs_link_rdev(mddev, rdev)) |