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Revert "md: allow a partially recovered device to be hot-added to an array."
This reverts commit7eb418851f
. 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:7eb418851f
("md: allow a partially recovered device to be hot-added to an array.")
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1 changed files with 1 additions and 2 deletions
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@ -8040,7 +8040,6 @@ static int remove_and_add_spares(struct mddev *mddev,
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!test_bit(Bitmap_sync, &rdev->flags)))
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continue;
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if (rdev->saved_raid_disk < 0)
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rdev->recovery_offset = 0;
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if (mddev->pers->
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hot_add_disk(mddev, rdev) == 0) {
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