Commit 5383ef3a authored Dec 04, 2013 by Joe Thornber Committed by Mike Snitzer Dec 10, 2013

dm thin: re-establish read-only state when switching to fail mode



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 <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org

parent 020cc3b5

drivers/md/dm-thin.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -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;

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