57 struct user_namespace {  struct
62 	struct user_namespace	*parent;  argument
101 	struct user_namespace *ns;  argument
107 extern struct user_namespace init_user_ns;
109 bool setup_userns_sysctls(struct user_namespace *ns);
110 void retire_userns_sysctls(struct user_namespace *ns);
111 struct ucounts *inc_ucount(struct user_namespace *ns, kuid_t uid, enum ucount_type type);
116 static inline struct user_namespace *get_user_ns(struct user_namespace *ns)  in get_user_ns()
125 extern void __put_user_ns(struct user_namespace *ns);
127 static inline void put_user_ns(struct user_namespace *ns)  in put_user_ns()
142 extern bool userns_may_setgroups(const struct user_namespace *ns);
143 extern bool in_userns(const struct user_namespace *ancestor,
144 		       const struct user_namespace *child);
145 extern bool current_in_userns(const struct user_namespace *target_ns);
149 static inline struct user_namespace *get_user_ns(struct user_namespace *ns)  in get_user_ns()
167 static inline void put_user_ns(struct user_namespace *ns)  in put_user_ns()
171 static inline bool userns_may_setgroups(const struct user_namespace *ns)  in userns_may_setgroups()
176 static inline bool in_userns(const struct user_namespace *ancestor,  in in_userns()
177 			     const struct user_namespace *child)  in in_userns()
182 static inline bool current_in_userns(const struct user_namespace *target_ns)  in current_in_userns()