33 struct key;
132 static inline key_ref_t make_key_ref(const struct key *key,  in make_key_ref()  argument
135 	return (key_ref_t) ((unsigned long) key | possession);  in make_key_ref()
138 static inline struct key *key_ref_to_ptr(const key_ref_t key_ref)  in key_ref_to_ptr()
140 	return (struct key *) ((unsigned long) key_ref & ~1UL);  in key_ref_to_ptr()
148 typedef int (*key_restrict_link_func_t)(struct key *dest_keyring,
151 					struct key *restriction_key);
155 	struct key *key;  member
172 struct key {  struct
257 extern struct key *key_alloc(struct key_type *type,
273 extern void key_revoke(struct key *key);
274 extern void key_invalidate(struct key *key);
275 extern void key_put(struct key *key);
279 static inline struct key *__key_get(struct key *key)  in __key_get()  argument
281 	refcount_inc(&key->usage);  in __key_get()
282 	return key;  in __key_get()
285 static inline struct key *key_get(struct key *key)  in key_get()  argument
287 	return key ? __key_get(key) : key;  in key_get()
295 extern struct key *request_key_tag(struct key_type *type,
300 extern struct key *request_key_rcu(struct key_type *type,
304 extern struct key *request_key_with_auxdata(struct key_type *type,
319 static inline struct key *request_key(struct key_type *type,  in request_key()
358 extern int wait_for_key_construction(struct key *key, bool intr);
360 extern int key_validate(const struct key *key);
370 extern int key_update(key_ref_t key,
374 extern int key_link(struct key *keyring,
375 		    struct key *key);
377 extern int key_move(struct key *key,
378 		    struct key *from_keyring,
379 		    struct key *to_keyring,
382 extern int key_unlink(struct key *keyring,
383 		      struct key *key);
385 extern struct key *keyring_alloc(const char *description, kuid_t uid, kgid_t gid,
390 				 struct key *dest);
392 extern int restrict_link_reject(struct key *keyring,
395 				struct key *restriction_key);
397 extern int keyring_clear(struct key *keyring);
404 extern int keyring_add_key(struct key *keyring,
405 			   struct key *key);
410 extern struct key *key_lookup(key_serial_t id);
412 static inline key_serial_t key_serial(const struct key *key)  in key_serial()  argument
414 	return key ? key->serial : 0;  in key_serial()
417 extern void key_set_timeout(struct key *, unsigned);
434 static inline short key_read_state(const struct key *key)  in key_read_state()  argument
437 	return smp_load_acquire(&key->state);  in key_read_state()
447 static inline bool key_is_positive(const struct key *key)  in key_is_positive()  argument
449 	return key_read_state(key) == KEY_IS_POSITIVE;  in key_is_positive()
452 static inline bool key_is_negative(const struct key *key)  in key_is_negative()  argument
454 	return key_read_state(key) < 0;  in key_is_negative()
462 				   rwsem_is_locked(&((struct key *)(KEY))->sem)))