55 struct user_namespace {  struct
60 	struct user_namespace	*parent;  argument
83 	struct user_namespace *ns;  argument
89 extern struct user_namespace init_user_ns;
91 bool setup_userns_sysctls(struct user_namespace *ns);
92 void retire_userns_sysctls(struct user_namespace *ns);
93 struct ucounts *inc_ucount(struct user_namespace *ns, kuid_t uid, enum ucount_type type);
98 static inline struct user_namespace *get_user_ns(struct user_namespace *ns)  in get_user_ns()
107 extern void __put_user_ns(struct user_namespace *ns);
109 static inline void put_user_ns(struct user_namespace *ns)  in put_user_ns()
124 extern bool userns_may_setgroups(const struct user_namespace *ns);
125 extern bool in_userns(const struct user_namespace *ancestor,
126 		       const struct user_namespace *child);
127 extern bool current_in_userns(const struct user_namespace *target_ns);
131 static inline struct user_namespace *get_user_ns(struct user_namespace *ns)  in get_user_ns()
149 static inline void put_user_ns(struct user_namespace *ns)  in put_user_ns()
153 static inline bool userns_may_setgroups(const struct user_namespace *ns)  in userns_may_setgroups()
158 static inline bool in_userns(const struct user_namespace *ancestor,  in in_userns()
159 			     const struct user_namespace *child)  in in_userns()
164 static inline bool current_in_userns(const struct user_namespace *target_ns)  in current_in_userns()