diff options
Diffstat (limited to 'include')
-rw-r--r-- | include/keys/user-type.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/include/keys/user-type.h b/include/keys/user-type.h new file mode 100644 index 000000000000..26f6ec38577a --- /dev/null +++ b/include/keys/user-type.h | |||
@@ -0,0 +1,47 @@ | |||
1 | /* user-type.h: User-defined key type | ||
2 | * | ||
3 | * Copyright (C) 2005 Red Hat, Inc. All Rights Reserved. | ||
4 | * Written by David Howells (dhowells@redhat.com) | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or | ||
7 | * modify it under the terms of the GNU General Public License | ||
8 | * as published by the Free Software Foundation; either version | ||
9 | * 2 of the License, or (at your option) any later version. | ||
10 | */ | ||
11 | |||
12 | #ifndef _KEYS_USER_TYPE_H | ||
13 | #define _KEYS_USER_TYPE_H | ||
14 | |||
15 | #include <linux/key.h> | ||
16 | #include <linux/rcupdate.h> | ||
17 | |||
18 | /*****************************************************************************/ | ||
19 | /* | ||
20 | * the payload for a key of type "user" | ||
21 | * - once filled in and attached to a key: | ||
22 | * - the payload struct is invariant may not be changed, only replaced | ||
23 | * - the payload must be read with RCU procedures or with the key semaphore | ||
24 | * held | ||
25 | * - the payload may only be replaced with the key semaphore write-locked | ||
26 | * - the key's data length is the size of the actual data, not including the | ||
27 | * payload wrapper | ||
28 | */ | ||
29 | struct user_key_payload { | ||
30 | struct rcu_head rcu; /* RCU destructor */ | ||
31 | unsigned short datalen; /* length of this data */ | ||
32 | char data[0]; /* actual data */ | ||
33 | }; | ||
34 | |||
35 | extern struct key_type key_type_user; | ||
36 | |||
37 | extern int user_instantiate(struct key *key, const void *data, size_t datalen); | ||
38 | extern int user_duplicate(struct key *key, const struct key *source); | ||
39 | extern int user_update(struct key *key, const void *data, size_t datalen); | ||
40 | extern int user_match(const struct key *key, const void *criterion); | ||
41 | extern void user_destroy(struct key *key); | ||
42 | extern void user_describe(const struct key *user, struct seq_file *m); | ||
43 | extern long user_read(const struct key *key, | ||
44 | char __user *buffer, size_t buflen); | ||
45 | |||
46 | |||
47 | #endif /* _KEYS_USER_TYPE_H */ | ||