diff options
| author | Heinz Mauelshagen <heinzm@redhat.com> | 2017-07-13 17:34:24 +0200 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2017-07-25 14:54:19 -0400 |
| commit | 0cf352e5a00a0ccf362e4ae60dcaa3318933f6e4 (patch) | |
| tree | dc5b13576fface6f62e9171304c80f9598de5bb0 /drivers/md/dm-raid.c | |
| parent | f4af3f82daed14ea06ac22eac198a45f56eb2cb1 (diff) | |
| download | linux-0cf352e5a00a0ccf362e4ae60dcaa3318933f6e4.tar.bz2 | |
dm raid: avoid mddev->suspended access
Use runtime flag to ensure that an mddev gets suspended/resumed just once.
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-raid.c')
| -rw-r--r-- | drivers/md/dm-raid.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c index c256a723b964..757355b2f1a1 100644 --- a/drivers/md/dm-raid.c +++ b/drivers/md/dm-raid.c @@ -208,6 +208,7 @@ struct raid_dev { #define RT_FLAG_RS_BITMAP_LOADED 2 #define RT_FLAG_UPDATE_SBS 3 #define RT_FLAG_RESHAPE_RS 4 +#define RT_FLAG_RS_SUSPENDED 5 /* Array elements of 64 bit needed for rebuild/failed disk bits */ #define DISKS_ARRAY_ELEMS ((MAX_RAID_DEVICES + (sizeof(uint64_t) * 8 - 1)) / sizeof(uint64_t) / 8) @@ -3169,6 +3170,7 @@ static int raid_ctr(struct dm_target *ti, unsigned int argc, char **argv) } mddev_suspend(&rs->md); + set_bit(RT_FLAG_RS_SUSPENDED, &rs->runtime_flags); /* Try to adjust the raid4/5/6 stripe cache size to the stripe size */ if (rs_is_raid456(rs)) { @@ -3626,7 +3628,7 @@ static void raid_postsuspend(struct dm_target *ti) { struct raid_set *rs = ti->private; - if (!rs->md.suspended) + if (!test_and_set_bit(RT_FLAG_RS_SUSPENDED, &rs->runtime_flags)) mddev_suspend(&rs->md); rs->md.ro = 1; @@ -3760,7 +3762,7 @@ static int rs_start_reshape(struct raid_set *rs) return r; /* Need to be resumed to be able to start reshape, recovery is frozen until raid_resume() though */ - if (mddev->suspended) + if (test_and_clear_bit(RT_FLAG_RS_SUSPENDED, &rs->runtime_flags)) mddev_resume(mddev); /* @@ -3787,8 +3789,8 @@ static int rs_start_reshape(struct raid_set *rs) } /* Suspend because a resume will happen in raid_resume() */ - if (!mddev->suspended) - mddev_suspend(mddev); + set_bit(RT_FLAG_RS_SUSPENDED, &rs->runtime_flags); + mddev_suspend(mddev); /* * Now reshape got set up, update superblocks to @@ -3884,7 +3886,7 @@ static void raid_resume(struct dm_target *ti) if (!(rs->ctr_flags & RESUME_STAY_FROZEN_FLAGS)) clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); - if (mddev->suspended) + if (test_and_clear_bit(RT_FLAG_RS_SUSPENDED, &rs->runtime_flags)) mddev_resume(mddev); } |