[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/utsname.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sched.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 u32 *
nul_marshal(struct rpc_task *task, u32 *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)
{
	task->tk_msg.rpc_cred->cr_flags |= RPCAUTH_CRED_UPTODATE;
	return 0;
}

static u32 *
nul_validate(struct rpc_task *task, u32 *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;
}

struct rpc_authops authnull_ops = {
	.owner		= THIS_MODULE,
	.au_flavor	= RPC_AUTH_NULL,
#ifdef RPC_DEBUG
	.au_name	= "NULL",
#endif
	.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,
};

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

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