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-rw-r--r--include/linux/key.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/key.h b/include/linux/key.h
index b2bb01719561..ef19b99aff98 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h
@@ -276,6 +276,19 @@ static inline key_serial_t key_serial(struct key *key)
276 return key ? key->serial : 0; 276 return key ? key->serial : 0;
277} 277}
278 278
279/**
280 * key_is_instantiated - Determine if a key has been positively instantiated
281 * @key: The key to check.
282 *
283 * Return true if the specified key has been positively instantiated, false
284 * otherwise.
285 */
286static inline bool key_is_instantiated(const struct key *key)
287{
288 return test_bit(KEY_FLAG_INSTANTIATED, &key->flags) &&
289 !test_bit(KEY_FLAG_NEGATIVE, &key->flags);
290}
291
279#define rcu_dereference_key(KEY) \ 292#define rcu_dereference_key(KEY) \
280 (rcu_dereference_protected((KEY)->payload.rcudata, \ 293 (rcu_dereference_protected((KEY)->payload.rcudata, \
281 rwsem_is_locked(&((struct key *)(KEY))->sem))) 294 rwsem_is_locked(&((struct key *)(KEY))->sem)))