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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" or "logon" |
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 | extern struct key_type key_type_logon; |
37 | |
38 | struct key_preparsed_payload; |
39 | |
40 | extern int user_instantiate(struct key *key, struct key_preparsed_payload *prep); |
41 | extern int user_update(struct key *key, struct key_preparsed_payload *prep); |
42 | extern int user_match(const struct key *key, const void *criterion); |
43 | extern void user_revoke(struct key *key); |
44 | extern void user_destroy(struct key *key); |
45 | extern void user_describe(const struct key *user, struct seq_file *m); |
46 | extern long user_read(const struct key *key, |
47 | char __user *buffer, size_t buflen); |
48 | |
49 | |
50 | #endif /* _KEYS_USER_TYPE_H */ |
51 |
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