blob: c70dd7f5258e18b440f02a072a9a62337cd61d87 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include <linux/utsname.h>
12#include <linux/sunrpc/clnt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013
14#ifdef RPC_DEBUG
15# define RPCDBG_FACILITY RPCDBG_AUTH
16#endif
17
18static struct rpc_auth null_auth;
19static struct rpc_cred null_cred;
20
21static struct rpc_auth *
22nul_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
23{
24 atomic_inc(&null_auth.au_count);
25 return &null_auth;
26}
27
28static void
29nul_destroy(struct rpc_auth *auth)
30{
31}
32
33/*
34 * Lookup NULL creds for current process
35 */
36static struct rpc_cred *
37nul_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 */
45static void
46nul_destroy_cred(struct rpc_cred *cred)
47{
48}
49
50/*
51 * Match cred handle against current process
52 */
53static int
54nul_match(struct auth_cred *acred, struct rpc_cred *cred, int taskflags)
55{
56 return 1;
57}
58
59/*
60 * Marshal credential.
61 */
Alexey Dobriyand8ed0292006-09-26 22:29:38 -070062static __be32 *
63nul_marshal(struct rpc_task *task, __be32 *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -070064{
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 */
76static int
77nul_refresh(struct rpc_task *task)
78{
Trond Myklebustfc432dd2007-06-25 10:15:15 -040079 set_bit(RPCAUTH_CRED_UPTODATE, &task->tk_msg.rpc_cred->cr_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 return 0;
81}
82
Alexey Dobriyand8ed0292006-09-26 22:29:38 -070083static __be32 *
84nul_validate(struct rpc_task *task, __be32 *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -070085{
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
Trond Myklebustf1c0a862007-06-23 20:17:58 -0400104const struct rpc_authops authnull_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 .owner = THIS_MODULE,
106 .au_flavor = RPC_AUTH_NULL,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 .au_name = "NULL",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 .create = nul_create,
109 .destroy = nul_destroy,
110 .lookup_cred = nul_lookup_cred,
111};
112
113static
114struct rpc_auth null_auth = {
115 .au_cslack = 4,
116 .au_rslack = 2,
117 .au_ops = &authnull_ops,
Trond Myklebust81039f12006-06-09 09:34:34 -0400118 .au_flavor = RPC_AUTH_NULL,
119 .au_count = ATOMIC_INIT(0),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120};
121
122static
Trond Myklebustf1c0a862007-06-23 20:17:58 -0400123const struct rpc_credops null_credops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 .cr_name = "AUTH_NULL",
125 .crdestroy = nul_destroy_cred,
Trond Myklebust5c691042008-03-12 16:21:07 -0400126 .crbind = rpcauth_generic_bind_cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 .crmatch = nul_match,
128 .crmarshal = nul_marshal,
129 .crrefresh = nul_refresh,
130 .crvalidate = nul_validate,
131};
132
133static
134struct rpc_cred null_cred = {
Trond Myklebuste092bdc2007-06-23 19:45:36 -0400135 .cr_lru = LIST_HEAD_INIT(null_cred.cr_lru),
Trond Myklebust4a8c1342007-06-07 10:14:14 -0400136 .cr_auth = &null_auth,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 .cr_ops = &null_credops,
138 .cr_count = ATOMIC_INIT(1),
Trond Myklebustfc432dd2007-06-25 10:15:15 -0400139 .cr_flags = 1UL << RPCAUTH_CRED_UPTODATE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140#ifdef RPC_DEBUG
141 .cr_magic = RPCAUTH_CRED_MAGIC,
142#endif
143};