+int btrfs_qgroup_parse_sort_string(const char *opt_arg,
+ struct btrfs_qgroup_comparer_set **comps);
+int btrfs_show_qgroups(int fd, struct btrfs_qgroup_filter_set *,
+ struct btrfs_qgroup_comparer_set *);
+void btrfs_qgroup_setup_print_column(enum btrfs_qgroup_column_enum column);
+void btrfs_qgroup_setup_units(unsigned unit_mode);
+struct btrfs_qgroup_filter_set *btrfs_qgroup_alloc_filter_set(void);
+int btrfs_qgroup_setup_filter(struct btrfs_qgroup_filter_set **filter_set,
+ enum btrfs_qgroup_filter_enum, u64 data);
+struct btrfs_qgroup_comparer_set *btrfs_qgroup_alloc_comparer_set(void);
+int btrfs_qgroup_setup_comparer(struct btrfs_qgroup_comparer_set **comp_set,
+ enum btrfs_qgroup_comp_enum comparer,
+ int is_descending);