Btrfs: Only open block devices once during mount -o subvol=

btrfs_open_devices needed a check to see if the device was already open. Signed-off-by: Chris Mason <chris.mason@oracle.com>
git-mirror · Sep 25, 2008 · c1c4d91 · c1c4d91
1 parent a68d593
commit c1c4d91
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
@@ -196,6 +196,9 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
 	mutex_lock(&uuid_mutex);
 	list_for_each(cur, head) {
 		device = list_entry(cur, struct btrfs_device, dev_list);
+		if (device->bdev)
+			continue;
+
 		bdev = open_bdev_excl(device->name, flags, holder);
 
 		if (IS_ERR(bdev)) {