Merge tag 'dm-3.20-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device...

[karo-tx-linux.git] / drivers / md / dm-thin.c

diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index 0f781451ea3f2b344dd830f085a22ba73643607a..654773cb1eeea23b39db0fcf0e6fb00d91d9476d 100644 (file)
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -3386,6 +3386,12 @@ static int pool_message(struct dm_target *ti, unsigned argc, char **argv)
        struct pool_c *pt = ti->private;
        struct pool *pool = pt->pool;
 
+       if (get_pool_mode(pool) >= PM_READ_ONLY) {
+               DMERR("%s: unable to service pool target messages in READ_ONLY or FAIL mode",
+                     dm_device_name(pool->pool_md));
+               return -EINVAL;
+       }
+
        if (!strcasecmp(argv[0], "create_thin"))
                r = process_create_thin_mesg(argc, argv, pool);