[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / keys / user-type.h

/* 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" 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;

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 */
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 DH	37
2aa349f6 DH	38	extern int user_instantiate(struct key key, const void data, size_t datalen);
2aa349f6 DH	39	extern int user_update(struct key key, const void data, size_t datalen);
2aa349f6 DH	40	extern int user_match(const struct key key, const void criterion);
31204ed9	41	extern void user_revoke(struct key *key);
2aa349f6 DH	42	extern void user_destroy(struct key *key);
	43	extern void user_describe(const struct key user, struct seq_file m);
	44	extern long user_read(const struct key *key,
	45	char __user *buffer, size_t buflen);
	46
	47
	48	#endif /* _KEYS_USER_TYPE_H */