Btrfs: make subvolid=0 mount the original default root
Since theres not a good way to make sure the user sees the original default root
tree id, and not to mention it's 5 so is way different than any other volume,
just make subvol=0 mount the original default root. This makes it a bit easier
for users to handle in the long run. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index f878337..9771eb8 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -325,9 +325,15 @@
break;
case Opt_subvolid:
intarg = 0;
- match_int(&args[0], &intarg);
- if (intarg)
- *subvol_objectid = intarg;
+ error = match_int(&args[0], &intarg);
+ if (!error) {
+ /* we want the original fs_tree */
+ if (!intarg)
+ *subvol_objectid =
+ BTRFS_FS_TREE_OBJECTID;
+ else
+ *subvol_objectid = intarg;
+ }
break;
case Opt_device:
error = btrfs_scan_one_device(match_strdup(&args[0]),