AuxXxilium/linux_dsm_epyc7002
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md: always set MD_RECOVERY_INTR when aborting a reshape or other "resync".

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If mddev->ro is set, md_to_sync will (correctly) abort.
However in that case MD_RECOVERY_INTR isn't set.

If a RESHAPE had been requested, then ->finish_reshape() will be
called and it will think the reshape was successful even though
nothing happened.

Normally a resync will not be requested if ->ro is set, but if an
array is stopped while a reshape is on-going, then when the array is
started, the reshape will be restarted.  If the array is also set
read-only at this point, the reshape will instantly appear to success,
resulting in data corruption.

Consequently, this patch is suitable for any -stable kernel.

Cc: stable@vger.kernel.org (any)
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2014-05-28 13:39:23 +10:00
parent c7208164e6
commit 3991b31ea0
1 changed files with 3 additions and 1 deletions
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4
drivers/md/md.c
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@ -7381,8 +7381,10 @@ void md_do_sync(struct md_thread *thread)
/* just incase thread restarts... */
if (test_bit(MD_RECOVERY_DONE, &mddev->recovery))
return;
if (mddev->ro) /* never try to sync a read-only array */
if (mddev->ro) {/* never try to sync a read-only array */
set_bit(MD_RECOVERY_INTR, &mddev->recovery);
return;
}
if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) {
if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) {