blob: 3df9fccab2f8b34c17b7d04208a0c46f3d9d4219 [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{
79 task->tk_msg.rpc_cred->cr_flags |= RPCAUTH_CRED_UPTODATE;
80 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
104struct rpc_authops authnull_ops = {
105 .owner = THIS_MODULE,
106 .au_flavor = RPC_AUTH_NULL,
107#ifdef RPC_DEBUG
108 .au_name = "NULL",
109#endif
110 .create = nul_create,
111 .destroy = nul_destroy,
112 .lookup_cred = nul_lookup_cred,
113};
114
115static
116struct rpc_auth null_auth = {
117 .au_cslack = 4,
118 .au_rslack = 2,
119 .au_ops = &authnull_ops,
Trond Myklebust81039f12006-06-09 09:34:34 -0400120 .au_flavor = RPC_AUTH_NULL,
121 .au_count = ATOMIC_INIT(0),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122};
123
124static
125struct rpc_credops null_credops = {
126 .cr_name = "AUTH_NULL",
127 .crdestroy = nul_destroy_cred,
128 .crmatch = nul_match,
129 .crmarshal = nul_marshal,
130 .crrefresh = nul_refresh,
131 .crvalidate = nul_validate,
132};
133
134static
135struct rpc_cred null_cred = {
136 .cr_ops = &null_credops,
137 .cr_count = ATOMIC_INIT(1),
138 .cr_flags = RPCAUTH_CRED_UPTODATE,
139#ifdef RPC_DEBUG
140 .cr_magic = RPCAUTH_CRED_MAGIC,
141#endif
142};