mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 22:53:55 +08:00
31204ed925
Cause the keys linked to a keyring to be unlinked from it when revoked and it causes the data attached to a user-defined key to be discarded when revoked. This frees up most of the quota a key occupied at that point, rather than waiting for the key to actually be destroyed. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
48 lines
1.7 KiB
C
48 lines
1.7 KiB
C
/* user-type.h: User-defined key type
|
|
*
|
|
* Copyright (C) 2005 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#ifndef _KEYS_USER_TYPE_H
|
|
#define _KEYS_USER_TYPE_H
|
|
|
|
#include <linux/key.h>
|
|
#include <linux/rcupdate.h>
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* the payload for a key of type "user"
|
|
* - once filled in and attached to a key:
|
|
* - the payload struct is invariant may not be changed, only replaced
|
|
* - the payload must be read with RCU procedures or with the key semaphore
|
|
* held
|
|
* - the payload may only be replaced with the key semaphore write-locked
|
|
* - the key's data length is the size of the actual data, not including the
|
|
* payload wrapper
|
|
*/
|
|
struct user_key_payload {
|
|
struct rcu_head rcu; /* RCU destructor */
|
|
unsigned short datalen; /* length of this data */
|
|
char data[0]; /* actual data */
|
|
};
|
|
|
|
extern struct key_type key_type_user;
|
|
|
|
extern int user_instantiate(struct key *key, const void *data, size_t datalen);
|
|
extern int user_update(struct key *key, const void *data, size_t datalen);
|
|
extern int user_match(const struct key *key, const void *criterion);
|
|
extern void user_revoke(struct key *key);
|
|
extern void user_destroy(struct key *key);
|
|
extern void user_describe(const struct key *user, struct seq_file *m);
|
|
extern long user_read(const struct key *key,
|
|
char __user *buffer, size_t buflen);
|
|
|
|
|
|
#endif /* _KEYS_USER_TYPE_H */
|