From: Joe Thornber Date: Wed, 4 Dec 2013 21:30:01 +0000 (-0500) Subject: dm thin: re-establish read-only state when switching to fail mode X-Git-Tag: submit/tizen_common/20140905.094502~1280 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6aa06206adee5208abb1f2313fa0017e099ec9a4;p=sdk%2Femulator%2Femulator-kernel.git dm thin: re-establish read-only state when switching to fail mode commit 5383ef3a929a1366e2ced45cd6d74be7aa2a2281 upstream. If the thin-pool transitioned to fail mode and the thin-pool's table were reloaded for some reason: the new table's default pool mode would be read-write, though it will transition to fail mode during resume. When the pool mode transitions directly from PM_WRITE to PM_FAIL we need to re-establish the intermediate read-only state in both the metadata and persistent-data block manager (as is usually done with the normal pool mode transition sequence: PM_WRITE -> PM_READ_ONLY -> PM_FAIL). Signed-off-by: Joe Thornber Signed-off-by: Mike Snitzer Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c index af79bae5ab74..0d7852e2b275 100644 --- a/drivers/md/dm-thin.c +++ b/drivers/md/dm-thin.c @@ -1400,6 +1400,7 @@ static void set_pool_mode(struct pool *pool, enum pool_mode mode) case PM_FAIL: DMERR("%s: switching pool to failure mode", dm_device_name(pool->pool_md)); + dm_pool_metadata_read_only(pool->pmd); pool->process_bio = process_bio_fail; pool->process_discard = process_bio_fail; pool->process_prepared_mapping = process_prepared_mapping_fail;