[GitHub/mt8127/android_kernel_alcatel_ttab.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/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_rqstp->rq_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	11	#include <linux/sunrpc/clnt.h>
1da177e4 LT	12
	13	#ifdef RPC_DEBUG
	14	# define RPCDBG_FACILITY RPCDBG_AUTH
	15	#endif
	16
	17	static struct rpc_auth null_auth;
	18	static struct rpc_cred null_cred;
	19
	20	static struct rpc_auth *
	21	nul_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
	22	{
	23	atomic_inc(&null_auth.au_count);
	24	return &null_auth;
	25	}
	26
	27	static void
	28	nul_destroy(struct rpc_auth *auth)
	29	{
	30	}
	31
	32	/*
	33	* Lookup NULL creds for current process
	34	*/
	35	static struct rpc_cred *
	36	nul_lookup_cred(struct rpc_auth auth, struct auth_cred acred, int flags)
	37	{
	38	return get_rpccred(&null_cred);
	39	}
	40
	41	/*
	42	* Destroy cred handle.
	43	*/
	44	static void
	45	nul_destroy_cred(struct rpc_cred *cred)
	46	{
	47	}
	48
	49	/*
	50	* Match cred handle against current process
	51	*/
	52	static int
	53	nul_match(struct auth_cred acred, struct rpc_cred cred, int taskflags)
	54	{
	55	return 1;
	56	}
	57
	58	/*
	59	* Marshal credential.
	60	*/
d8ed029d AD	61	static __be32 *
d8ed029d AD	62	nul_marshal(struct rpc_task task, __be32 p)
1da177e4 LT	63	{
	64	*p++ = htonl(RPC_AUTH_NULL);
	65	*p++ = 0;
	66	*p++ = htonl(RPC_AUTH_NULL);
	67	*p++ = 0;
	68
	69	return p;
	70	}
	71
	72	/*
	73	* Refresh credential. This is a no-op for AUTH_NULL
	74	*/
	75	static int
	76	nul_refresh(struct rpc_task *task)
	77	{
a17c2153	78	set_bit(RPCAUTH_CRED_UPTODATE, &task->tk_rqstp->rq_cred->cr_flags);
1da177e4 LT	79	return 0;
	80	}
	81
d8ed029d AD	82	static __be32 *
d8ed029d AD	83	nul_validate(struct rpc_task task, __be32 p)
1da177e4 LT	84	{
	85	rpc_authflavor_t flavor;
	86	u32 size;
	87
	88	flavor = ntohl(*p++);
	89	if (flavor != RPC_AUTH_NULL) {
	90	printk("RPC: bad verf flavor: %u\n", flavor);
	91	return NULL;
	92	}
	93
	94	size = ntohl(*p++);
	95	if (size != 0) {
	96	printk("RPC: bad verf size: %u\n", size);
	97	return NULL;
	98	}
	99
	100	return p;
	101	}
	102
f1c0a861	103	const struct rpc_authops authnull_ops = {
1da177e4 LT	104	.owner = THIS_MODULE,
1da177e4 LT	105	.au_flavor = RPC_AUTH_NULL,
1da177e4	106	.au_name = "NULL",
1da177e4 LT	107	.create = nul_create,
	108	.destroy = nul_destroy,
	109	.lookup_cred = nul_lookup_cred,
	110	};
	111
	112	static
	113	struct rpc_auth null_auth = {
	114	.au_cslack = 4,
	115	.au_rslack = 2,
	116	.au_ops = &authnull_ops,
81039f1f TM	117	.au_flavor = RPC_AUTH_NULL,
81039f1f TM	118	.au_count = ATOMIC_INIT(0),
1da177e4 LT	119	};
	120
	121	static
f1c0a861	122	const struct rpc_credops null_credops = {
1da177e4 LT	123	.cr_name = "AUTH_NULL",
1da177e4 LT	124	.crdestroy = nul_destroy_cred,
5c691044	125	.crbind = rpcauth_generic_bind_cred,
1da177e4 LT	126	.crmatch = nul_match,
	127	.crmarshal = nul_marshal,
	128	.crrefresh = nul_refresh,
	129	.crvalidate = nul_validate,
	130	};
	131
	132	static
	133	struct rpc_cred null_cred = {
e092bdcd	134	.cr_lru = LIST_HEAD_INIT(null_cred.cr_lru),
4a8c1344	135	.cr_auth = &null_auth,
1da177e4 LT	136	.cr_ops = &null_credops,
1da177e4 LT	137	.cr_count = ATOMIC_INIT(1),
fc432dd9	138	.cr_flags = 1UL << RPCAUTH_CRED_UPTODATE,
1da177e4 LT	139	#ifdef RPC_DEBUG
	140	.cr_magic = RPCAUTH_CRED_MAGIC,
	141	#endif
	142	};