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dm raid: fix data corruption on reshape request

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am: 2937e22c23

Change-Id: I3a55981aab612685064716fad5c0e70d021c62bb
This commit is contained in:
Heinz Mauelshagen
2017-03-12 08:19:33 +00:00
committed by android-build-merger
parent 6bdafe157b 2937e22c23
commit 8e9e5fc202
1 changed files with 11 additions and 1 deletions
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12
drivers/md/dm-raid.c
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@@ -3621,6 +3621,8 @@ static int raid_preresume(struct dm_target *ti)
return r;
}
#define RESUME_STAY_FROZEN_FLAGS (CTR_FLAG_DELTA_DISKS | CTR_FLAG_DATA_OFFSET)
static void raid_resume(struct dm_target *ti)
{
struct raid_set *rs = ti->private;
@@ -3638,7 +3640,15 @@ static void raid_resume(struct dm_target *ti)
mddev->ro = 0;
mddev->in_sync = 0;
clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
/*
* Keep the RAID set frozen if reshape/rebuild flags are set.
* The RAID set is unfrozen once the next table load/resume,
* which clears the reshape/rebuild flags, occurs.
* This ensures that the constructor for the inactive table
* retrieves an up-to-date reshape_position.
*/
if (!(rs->ctr_flags & RESUME_STAY_FROZEN_FLAGS))
clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
if (mddev->suspended)
mddev_resume(mddev);