33 struct key;
155 static inline key_ref_t make_key_ref(const struct key *key,  in make_key_ref()  argument
158 	return (key_ref_t) ((unsigned long) key | possession);  in make_key_ref()
161 static inline struct key *key_ref_to_ptr(const key_ref_t key_ref)  in key_ref_to_ptr()
163 	return (struct key *) ((unsigned long) key_ref & ~1UL);  in key_ref_to_ptr()
171 typedef int (*key_restrict_link_func_t)(struct key *dest_keyring,
174 					struct key *restriction_key);
178 	struct key *key;  member
195 struct key {  struct
283 extern struct key *key_alloc(struct key_type *type,
300 extern void key_revoke(struct key *key);
301 extern void key_invalidate(struct key *key);
302 extern void key_put(struct key *key);
306 static inline struct key *__key_get(struct key *key)  in __key_get()  argument
308 	refcount_inc(&key->usage);  in __key_get()
309 	return key;  in __key_get()
312 static inline struct key *key_get(struct key *key)  in key_get()  argument
314 	return key ? __key_get(key) : key;  in key_get()
322 extern struct key *request_key_tag(struct key_type *type,
327 extern struct key *request_key_rcu(struct key_type *type,
331 extern struct key *request_key_with_auxdata(struct key_type *type,
346 static inline struct key *request_key(struct key_type *type,  in request_key()
385 extern int wait_for_key_construction(struct key *key, bool intr);
387 extern int key_validate(const struct key *key);
397 extern int key_update(key_ref_t key,
401 extern int key_link(struct key *keyring,
402 		    struct key *key);
404 extern int key_move(struct key *key,
405 		    struct key *from_keyring,
406 		    struct key *to_keyring,
409 extern int key_unlink(struct key *keyring,
410 		      struct key *key);
412 extern struct key *keyring_alloc(const char *description, kuid_t uid, kgid_t gid,
417 				 struct key *dest);
419 extern int restrict_link_reject(struct key *keyring,
422 				struct key *restriction_key);
424 extern int keyring_clear(struct key *keyring);
431 extern int keyring_add_key(struct key *keyring,
432 			   struct key *key);
437 extern struct key *key_lookup(key_serial_t id);
439 static inline key_serial_t key_serial(const struct key *key)  in key_serial()  argument
441 	return key ? key->serial : 0;  in key_serial()
444 extern void key_set_timeout(struct key *, unsigned);
450 static inline short key_read_state(const struct key *key)  in key_read_state()  argument
453 	return smp_load_acquire(&key->state);  in key_read_state()
463 static inline bool key_is_positive(const struct key *key)  in key_is_positive()  argument
465 	return key_read_state(key) == KEY_IS_POSITIVE;  in key_is_positive()
468 static inline bool key_is_negative(const struct key *key)  in key_is_negative()  argument
470 	return key_read_state(key) < 0;  in key_is_negative()
478 				   rwsem_is_locked(&((struct key *)(KEY))->sem)))