projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 2aa349f6 DH |
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 | /* | |
| 9f6ed2ca | 20 | * the payload for a key of type "user" or "logon" |
| 2aa349f6 DH |
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; | |
| 9f6ed2ca | 36 | extern struct key_type key_type_logon; |
| 2aa349f6 | 37 | |
| cf7f601c DH |
38 | struct key_preparsed_payload; |
| 39 | ||
| f9167789 DH |
40 | extern int user_preparse(struct key_preparsed_payload *prep); |
| 41 | extern void user_free_preparse(struct key_preparsed_payload *prep); | |
| cf7f601c | 42 | extern int user_update(struct key *key, struct key_preparsed_payload *prep); |
| 31204ed9 | 43 | extern void user_revoke(struct key *key); |
| 2aa349f6 DH |
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 */ |