This is a note to let you know that I've just added the patch titled
md: Remove recent change which allows devices to skip recovery.
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
md-remove-recent-change-which-allows-devices-to-skip-recovery.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5024c298311f3b97c85cb034f9edaa333fdb9338 Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@xxxxxxx>
Date: Wed, 17 Jul 2013 14:55:31 +1000
Subject: md: Remove recent change which allows devices to skip recovery.
From: NeilBrown <neilb@xxxxxxx>
commit 5024c298311f3b97c85cb034f9edaa333fdb9338 upstream.
commit 7ceb17e87bde79d285a8b988cfed9eaeebe60b86
md: Allow devices to be re-added to a read-only array.
allowed a bit more than just that. It also allows devices to be added
to a read-write array and to end up skipping recovery.
This patch removes the offending piece of code pending a rewrite for a
subsequent release.
More specifically:
If the array has a bitmap, then the device will still need a bitmap
based resync ('saved_raid_disk' is set under different conditions
is a bitmap is present).
If the array doesn't have a bitmap, then this is correct as long as
nothing has been written to the array since the metadata was checked
by ->validate_super. However there is no locking to ensure that there
was no write.
Bug was introduced in 3.10 and causes data corruption so
patch is suitable for 3.10-stable.
Reported-by: Joe Lawrence <joe.lawrence@xxxxxxxxxxx>
Signed-off-by: NeilBrown <neilb@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/md.c | 14 --------------
1 file changed, 14 deletions(-)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -7697,20 +7697,6 @@ static int remove_and_add_spares(struct
continue;
rdev->recovery_offset = 0;
- if (rdev->saved_raid_disk >= 0 && mddev->in_sync) {
- spin_lock_irq(&mddev->write_lock);
- if (mddev->in_sync)
- /* OK, this device, which is in_sync,
- * will definitely be noticed before
- * the next write, so recovery isn't
- * needed.
- */
- rdev->recovery_offset = mddev->recovery_cp;
- spin_unlock_irq(&mddev->write_lock);
- }
- if (mddev->ro && rdev->recovery_offset != MaxSector)
- /* not safe to add this disk now */
- continue;
if (mddev->pers->
hot_add_disk(mddev, rdev) == 0) {
if (sysfs_link_rdev(mddev, rdev))
Patches currently in stable-queue which might be from neilb@xxxxxxx are
queue-3.10/md-remove-recent-change-which-allows-devices-to-skip-recovery.patch
queue-3.10/md-raid10-remove-use-after-free-bug.patch
queue-3.10/md-raid1-fix-bio-handling-problems-in-process_checks.patch
queue-3.10/md-raid5-fix-interaction-of-replace-and-recovery.patch
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