daemon/c_vol: set DEBUG to WARN on failed device mapper delete

In c_vol_cleanup_dm, we only print debug logs on failed deletion of
dm-crypt/integrity or dm-verity devices. We increase the log level
from DEBUG to WARN on errors of cryptfs_delete_blk_dev and
verity_delete_blk_dev().

Signed-off-by: Michael Weiß <[email protected]>

Author: quitschbo

daemon/c_vol.c

@@ -1116,10 +1116,10 @@ c_vol_cleanup_dm(c_vol_t *vol)
 						      CRYPTFS_MODE_AUTHENC;
 			mem_free0(not_stacked_file);
 			if (cryptfs_delete_blk_dev(fd, label, mode) < 0)
-				DEBUG("Could not delete dm-crypt dev %s", label);
+				WARN("Could not delete dm-crypt dev %s", label);
 		} else if (!strcmp(type, "verity")) {
 			if (verity_delete_blk_dev(label) < 0)
-				DEBUG("Could not delete dm-verity dev %s", label);
+				WARN("Could not delete dm-verity dev %s", label);
 		}
 		mem_free0(label);
 		mem_free0(type);