+const char *subvol_strip_mountpoint(const char *mnt, const char *full_path);
+int get_subvol_info(const char *fullpath, struct root_info *get_ri);
+int get_subvol_info_by_rootid(const char *mnt, struct root_info *get_ri,
+ u64 rootid_arg);
+int get_subvol_info_by_uuid(const char *mnt, struct root_info *get_ri,
+ u8 *uuid_arg);
+int find_next_key(struct btrfs_path *path, struct btrfs_key *key);
+const char* btrfs_group_type_str(u64 flag);
+const char* btrfs_group_profile_str(u64 flag);
+
+int count_digits(u64 num);
+u64 div_factor(u64 num, int factor);
+
+int btrfs_tree_search2_ioctl_supported(int fd);
+
+unsigned int get_unit_mode_from_arg(int *argc, char *argv[], int df_mode);
+int string_is_numerical(const char *str);
+int prefixcmp(const char *str, const char *prefix);
+
+unsigned long total_memory(void);
+