Btrfs: Use mount -o subvol to select the subvol directory instead of dev:
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index ffeee54..cd75c90 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1064,6 +1064,12 @@
((type *)(btrfs_leaf_data(leaf) + \
btrfs_item_offset((leaf)->items + (slot))))
+/* mount option defines and helpers */
+#define BTRFS_MOUNT_SUBVOL 0x000001
+#define btrfs_clear_opt(o, opt) o &= ~BTRFS_MOUNT_##opt
+#define btrfs_set_opt(o, opt) o |= BTRFS_MOUNT_##opt
+#define btrfs_test_opt(sb, opt) (BTRFS_SB(sb)->s_mount_opt & \
+ BTRFS_MOUNT_##opt)
/* extent-tree.c */
int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
struct btrfs_root *root);