38 struct key;
115 static inline key_ref_t make_key_ref(const struct key *key,  in make_key_ref()  argument
118 	return (key_ref_t) ((unsigned long) key | possession);  in make_key_ref()
121 static inline struct key *key_ref_to_ptr(const key_ref_t key_ref)  in key_ref_to_ptr()
123 	return (struct key *) ((unsigned long) key_ref & ~1UL);  in key_ref_to_ptr()
131 typedef int (*key_restrict_link_func_t)(struct key *dest_keyring,
134 					struct key *restriction_key);
138 	struct key *key;  member
155 struct key {  struct
237 extern struct key *key_alloc(struct key_type *type,
253 extern void key_revoke(struct key *key);
254 extern void key_invalidate(struct key *key);
255 extern void key_put(struct key *key);
257 static inline struct key *__key_get(struct key *key)  in __key_get()  argument
259 	refcount_inc(&key->usage);  in __key_get()
260 	return key;  in __key_get()
263 static inline struct key *key_get(struct key *key)  in key_get()  argument
265 	return key ? __key_get(key) : key;  in key_get()
273 extern struct key *request_key(struct key_type *type,
277 extern struct key *request_key_with_auxdata(struct key_type *type,
283 extern struct key *request_key_async(struct key_type *type,
288 extern struct key *request_key_async_with_auxdata(struct key_type *type,
294 extern int wait_for_key_construction(struct key *key, bool intr);
296 extern int key_validate(const struct key *key);
306 extern int key_update(key_ref_t key,
310 extern int key_link(struct key *keyring,
311 		    struct key *key);
313 extern int key_unlink(struct key *keyring,
314 		      struct key *key);
316 extern struct key *keyring_alloc(const char *description, kuid_t uid, kgid_t gid,
321 				 struct key *dest);
323 extern int restrict_link_reject(struct key *keyring,
326 				struct key *restriction_key);
328 extern int keyring_clear(struct key *keyring);
334 extern int keyring_add_key(struct key *keyring,
335 			   struct key *key);
340 extern struct key *key_lookup(key_serial_t id);
342 static inline key_serial_t key_serial(const struct key *key)  in key_serial()  argument
344 	return key ? key->serial : 0;  in key_serial()
347 extern void key_set_timeout(struct key *, unsigned);
360 static inline short key_read_state(const struct key *key)  in key_read_state()  argument
363 	return smp_load_acquire(&key->state);  in key_read_state()
373 static inline bool key_is_positive(const struct key *key)  in key_is_positive()  argument
375 	return key_read_state(key) == KEY_IS_POSITIVE;  in key_is_positive()
378 static inline bool key_is_negative(const struct key *key)  in key_is_negative()  argument
380 	return key_read_state(key) < 0;  in key_is_negative()
388 				   rwsem_is_locked(&((struct key *)(KEY))->sem)))