blob: f56767aaa9273678ca702758316acdd1587d9eef [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>
13#include <linux/sched.h>
14
15#ifdef RPC_DEBUG
16# define RPCDBG_FACILITY RPCDBG_AUTH
17#endif
18
19static struct rpc_auth null_auth;
20static struct rpc_cred null_cred;
21
22static struct rpc_auth *
23nul_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
24{
25 atomic_inc(&null_auth.au_count);
26 return &null_auth;
27}
28
29static void
30nul_destroy(struct rpc_auth *auth)
31{
32}
33
34/*
35 * Lookup NULL creds for current process
36 */
37static struct rpc_cred *
38nul_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 */
46static void
47nul_destroy_cred(struct rpc_cred *cred)
48{
49}
50
51/*
52 * Match cred handle against current process
53 */
54static int
55nul_match(struct auth_cred *acred, struct rpc_cred *cred, int taskflags)
56{
57 return 1;
58}
59
60/*
61 * Marshal credential.
62 */
63static u32 *
64nul_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 */
77static int
78nul_refresh(struct rpc_task *task)
79{
80 task->tk_msg.rpc_cred->cr_flags |= RPCAUTH_CRED_UPTODATE;
81 return 0;
82}
83
84static u32 *
85nul_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
105struct 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
116static
117struct rpc_auth null_auth = {
118 .au_cslack = 4,
119 .au_rslack = 2,
120 .au_ops = &authnull_ops,
121};
122
123static
124struct 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
133static
134struct 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};