mirror of
https://github.com/torvalds/linux.git
synced 2024-11-30 16:11:38 +00:00
146aa8b145
Merge the type-specific data with the payload data into one four-word chunk as it seems pointless to keep them separate. Use user_key_payload() for accessing the payloads of overloaded user-defined keys. Signed-off-by: David Howells <dhowells@redhat.com> cc: linux-cifs@vger.kernel.org cc: ecryptfs@vger.kernel.org cc: linux-ext4@vger.kernel.org cc: linux-f2fs-devel@lists.sourceforge.net cc: linux-nfs@vger.kernel.org cc: ceph-devel@vger.kernel.org cc: linux-ima-devel@lists.sourceforge.net
59 lines
1.9 KiB
C
59 lines
1.9 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>
|
|
|
|
#ifdef CONFIG_KEYS
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* the payload for a key of type "user" or "logon"
|
|
* - 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 struct key_type key_type_logon;
|
|
|
|
struct key_preparsed_payload;
|
|
|
|
extern int user_preparse(struct key_preparsed_payload *prep);
|
|
extern void user_free_preparse(struct key_preparsed_payload *prep);
|
|
extern int user_update(struct key *key, struct key_preparsed_payload *prep);
|
|
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);
|
|
|
|
static inline const struct user_key_payload *user_key_payload(const struct key *key)
|
|
{
|
|
return (struct user_key_payload *)rcu_dereference_key(key);
|
|
}
|
|
|
|
#endif /* CONFIG_KEYS */
|
|
|
|
#endif /* _KEYS_USER_TYPE_H */
|