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
284 extern struct key *key_alloc(struct key_type *type,
301 extern void key_revoke(struct key *key);
302 extern void key_invalidate(struct key *key);
303 extern void key_put(struct key *key);
307 static inline struct key *__key_get(struct key *key)  in __key_get()  argument
309 	refcount_inc(&key->usage);  in __key_get()
310 	return key;  in __key_get()
313 static inline struct key *key_get(struct key *key)  in key_get()  argument
315 	return key ? __key_get(key) : key;  in key_get()
323 extern struct key *request_key_tag(struct key_type *type,
328 extern struct key *request_key_rcu(struct key_type *type,
332 extern struct key *request_key_with_auxdata(struct key_type *type,
347 static inline struct key *request_key(struct key_type *type,  in request_key()
386 extern int wait_for_key_construction(struct key *key, bool intr);
388 extern int key_validate(const struct key *key);
406 extern int key_update(key_ref_t key,
410 extern int key_link(struct key *keyring,
411 		    struct key *key);
413 extern int key_move(struct key *key,
414 		    struct key *from_keyring,
415 		    struct key *to_keyring,
418 extern int key_unlink(struct key *keyring,
419 		      struct key *key);
421 extern struct key *keyring_alloc(const char *description, kuid_t uid, kgid_t gid,
426 				 struct key *dest);
428 extern int restrict_link_reject(struct key *keyring,
431 				struct key *restriction_key);
433 extern int keyring_clear(struct key *keyring);
443 extern struct key *key_lookup(key_serial_t id);
445 static inline key_serial_t key_serial(const struct key *key)  in key_serial()  argument
447 	return key ? key->serial : 0;  in key_serial()
450 extern void key_set_timeout(struct key *, unsigned);
456 static inline short key_read_state(const struct key *key)  in key_read_state()  argument
459 	return smp_load_acquire(&key->state);  in key_read_state()
469 static inline bool key_is_positive(const struct key *key)  in key_is_positive()  argument
471 	return key_read_state(key) == KEY_IS_POSITIVE;  in key_is_positive()
474 static inline bool key_is_negative(const struct key *key)  in key_is_negative()  argument
476 	return key_read_state(key) < 0;  in key_is_negative()
484 				   rwsem_is_locked(&((struct key *)(KEY))->sem)))