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-rw-r--r--Documentation/security/keys.txt17
1 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/security/keys.txt b/Documentation/security/keys.txt
index aa0dbd74b71b..a4f9125c0333 100644
--- a/Documentation/security/keys.txt
+++ b/Documentation/security/keys.txt
@@ -990,6 +990,23 @@ payload contents" for more information.
reference pointer if successful.
+(*) A keyring can be created by:
+
+ struct key *keyring_alloc(const char *description, uid_t uid, gid_t gid,
+ const struct cred *cred,
+ key_perm_t perm,
+ unsigned long flags,
+ struct key *dest);
+
+ This creates a keyring with the given attributes and returns it. If dest
+ is not NULL, the new keyring will be linked into the keyring to which it
+ points. No permission checks are made upon the destination keyring.
+
+ Error EDQUOT can be returned if the keyring would overload the quota (pass
+ KEY_ALLOC_NOT_IN_QUOTA in flags if the keyring shouldn't be accounted
+ towards the user's quota). Error ENOMEM can also be returned.
+
+
(*) To check the validity of a key, this function can be called:
int validate_key(struct key *key);