+static int enable_extrefs_flag(struct btrfs_root *root)
+{
+ struct btrfs_trans_handle *trans;
+ struct btrfs_super_block *disk_super;
+ u64 super_flags;
+
+ disk_super = root->fs_info->super_copy;
+ super_flags = btrfs_super_incompat_flags(disk_super);
+ super_flags |= BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF;
+ trans = btrfs_start_transaction(root, 1);
+ btrfs_set_super_incompat_flags(disk_super, super_flags);
+ btrfs_commit_transaction(trans, root);
+
+ return 0;
+}
+
+static int enable_skinny_metadata(struct btrfs_root *root)
+{
+ struct btrfs_trans_handle *trans;
+ struct btrfs_super_block *disk_super;
+ u64 super_flags;
+
+ disk_super = root->fs_info->super_copy;
+ super_flags = btrfs_super_incompat_flags(disk_super);
+ super_flags |= BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA;
+ trans = btrfs_start_transaction(root, 1);
+ btrfs_set_super_incompat_flags(disk_super, super_flags);
+ btrfs_commit_transaction(trans, root);
+
+ return 0;
+}
+