[linux-2.6-block.git] / net / sunrpc / auth_null.c

/*
 * linux/net/sunrpc/auth_null.c
 *
 * AUTH_NULL authentication. Really :-)
 *
 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
 */

#include <linux/types.h>
#include <linux/module.h>
#include <linux/utsname.h>
#include <linux/sunrpc/clnt.h>

#ifdef RPC_DEBUG
# define RPCDBG_FACILITY	RPCDBG_AUTH
#endif

static struct rpc_auth null_auth;
static struct rpc_cred null_cred;

static struct rpc_auth *
nul_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
{
	atomic_inc(&null_auth.au_count);
	return &null_auth;
}

static void
nul_destroy(struct rpc_auth *auth)
{
}

/*
 * Lookup NULL creds for current process
 */
static struct rpc_cred *
nul_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
{
	return get_rpccred(&null_cred);
}

/*
 * Destroy cred handle.
 */
static void
nul_destroy_cred(struct rpc_cred *cred)
{
}

/*
 * Match cred handle against current process
 */
static int
nul_match(struct auth_cred *acred, struct rpc_cred *cred, int taskflags)
{
	return 1;
}

/*
 * Marshal credential.
 */
static __be32 *
nul_marshal(struct rpc_task *task, __be32 *p)
{
	*p++ = htonl(RPC_AUTH_NULL);
	*p++ = 0;
	*p++ = htonl(RPC_AUTH_NULL);
	*p++ = 0;

	return p;
}

/*
 * Refresh credential. This is a no-op for AUTH_NULL
 */
static int
nul_refresh(struct rpc_task *task)
{
	set_bit(RPCAUTH_CRED_UPTODATE, &task->tk_msg.rpc_cred->cr_flags);
	return 0;
}

static __be32 *
nul_validate(struct rpc_task *task, __be32 *p)
{
	rpc_authflavor_t	flavor;
	u32			size;

	flavor = ntohl(*p++);
	if (flavor != RPC_AUTH_NULL) {
		printk("RPC: bad verf flavor: %u\n", flavor);
		return NULL;
	}

	size = ntohl(*p++);
	if (size != 0) {
		printk("RPC: bad verf size: %u\n", size);
		return NULL;
	}

	return p;
}

const struct rpc_authops authnull_ops = {
	.owner		= THIS_MODULE,
	.au_flavor	= RPC_AUTH_NULL,
	.au_name	= "NULL",
	.create		= nul_create,
	.destroy	= nul_destroy,
	.lookup_cred	= nul_lookup_cred,
};

static
struct rpc_auth null_auth = {
	.au_cslack	= 4,
	.au_rslack	= 2,
	.au_ops		= &authnull_ops,
	.au_flavor	= RPC_AUTH_NULL,
	.au_count	= ATOMIC_INIT(0),
};

static
const struct rpc_credops null_credops = {
	.cr_name	= "AUTH_NULL",
	.crdestroy	= nul_destroy_cred,
	.crbind		= rpcauth_generic_bind_cred,
	.crmatch	= nul_match,
	.crmarshal	= nul_marshal,
	.crrefresh	= nul_refresh,
	.crvalidate	= nul_validate,
};

static
struct rpc_cred null_cred = {
	.cr_lru		= LIST_HEAD_INIT(null_cred.cr_lru),
	.cr_auth	= &null_auth,
	.cr_ops		= &null_credops,
	.cr_count	= ATOMIC_INIT(1),
	.cr_flags	= 1UL << RPCAUTH_CRED_UPTODATE,
#ifdef RPC_DEBUG
	.cr_magic	= RPCAUTH_CRED_MAGIC,
#endif
};
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/net/sunrpc/auth_null.c
	3	*
	4	* AUTH_NULL authentication. Really :-)
	5	*
	6	* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
	7	*/
	8
	9	#include <linux/types.h>
1da177e4	10	#include <linux/module.h>
1da177e4 LT	11	#include <linux/utsname.h>
1da177e4 LT	12	#include <linux/sunrpc/clnt.h>
1da177e4 LT	13
	14	#ifdef RPC_DEBUG
	15	# define RPCDBG_FACILITY RPCDBG_AUTH
	16	#endif
	17
	18	static struct rpc_auth null_auth;
	19	static struct rpc_cred null_cred;
	20
	21	static struct rpc_auth *
	22	nul_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
	23	{
	24	atomic_inc(&null_auth.au_count);
	25	return &null_auth;
	26	}
	27
	28	static void
	29	nul_destroy(struct rpc_auth *auth)
	30	{
	31	}
	32
	33	/*
	34	* Lookup NULL creds for current process
	35	*/
	36	static struct rpc_cred *
	37	nul_lookup_cred(struct rpc_auth auth, struct auth_cred acred, int flags)
	38	{
	39	return get_rpccred(&null_cred);
	40	}
	41
	42	/*
	43	* Destroy cred handle.
	44	*/
	45	static void
	46	nul_destroy_cred(struct rpc_cred *cred)
	47	{
	48	}
	49
	50	/*
	51	* Match cred handle against current process
	52	*/
	53	static int
	54	nul_match(struct auth_cred acred, struct rpc_cred cred, int taskflags)
	55	{
	56	return 1;
	57	}
	58
	59	/*
	60	* Marshal credential.
	61	*/
d8ed029d AD	62	static __be32 *
d8ed029d AD	63	nul_marshal(struct rpc_task task, __be32 p)
1da177e4 LT	64	{
	65	*p++ = htonl(RPC_AUTH_NULL);
	66	*p++ = 0;
	67	*p++ = htonl(RPC_AUTH_NULL);
	68	*p++ = 0;
	69
	70	return p;
	71	}
	72
	73	/*
	74	* Refresh credential. This is a no-op for AUTH_NULL
	75	*/
	76	static int
	77	nul_refresh(struct rpc_task *task)
	78	{
fc432dd9	79	set_bit(RPCAUTH_CRED_UPTODATE, &task->tk_msg.rpc_cred->cr_flags);
1da177e4 LT	80	return 0;
	81	}
	82
d8ed029d AD	83	static __be32 *
d8ed029d AD	84	nul_validate(struct rpc_task task, __be32 p)
1da177e4 LT	85	{
	86	rpc_authflavor_t flavor;
	87	u32 size;
	88
	89	flavor = ntohl(*p++);
	90	if (flavor != RPC_AUTH_NULL) {
	91	printk("RPC: bad verf flavor: %u\n", flavor);
	92	return NULL;
	93	}
	94
	95	size = ntohl(*p++);
	96	if (size != 0) {
	97	printk("RPC: bad verf size: %u\n", size);
	98	return NULL;
	99	}
	100
	101	return p;
	102	}
	103
f1c0a861	104	const struct rpc_authops authnull_ops = {
1da177e4 LT	105	.owner = THIS_MODULE,
1da177e4 LT	106	.au_flavor = RPC_AUTH_NULL,
1da177e4	107	.au_name = "NULL",
1da177e4 LT	108	.create = nul_create,
	109	.destroy = nul_destroy,
	110	.lookup_cred = nul_lookup_cred,
	111	};
	112
	113	static
	114	struct rpc_auth null_auth = {
	115	.au_cslack = 4,
	116	.au_rslack = 2,
	117	.au_ops = &authnull_ops,
81039f1f TM	118	.au_flavor = RPC_AUTH_NULL,
81039f1f TM	119	.au_count = ATOMIC_INIT(0),
1da177e4 LT	120	};
	121
	122	static
f1c0a861	123	const struct rpc_credops null_credops = {
1da177e4 LT	124	.cr_name = "AUTH_NULL",
1da177e4 LT	125	.crdestroy = nul_destroy_cred,
5c691044	126	.crbind = rpcauth_generic_bind_cred,
1da177e4 LT	127	.crmatch = nul_match,
	128	.crmarshal = nul_marshal,
	129	.crrefresh = nul_refresh,
	130	.crvalidate = nul_validate,
	131	};
	132
	133	static
	134	struct rpc_cred null_cred = {
e092bdcd	135	.cr_lru = LIST_HEAD_INIT(null_cred.cr_lru),
4a8c1344	136	.cr_auth = &null_auth,
1da177e4 LT	137	.cr_ops = &null_credops,
1da177e4 LT	138	.cr_count = ATOMIC_INIT(1),
fc432dd9	139	.cr_flags = 1UL << RPCAUTH_CRED_UPTODATE,
1da177e4 LT	140	#ifdef RPC_DEBUG
	141	.cr_magic = RPCAUTH_CRED_MAGIC,
	142	#endif
	143	};