[PATCH] knfsd: remove CONFIG_IPV6 ifdefs from sunrpc server code
[linux-2.6] / net / sunrpc / auth_null.c
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>
10 #include <linux/module.h>
11 #include <linux/utsname.h>
12 #include <linux/sunrpc/clnt.h>
13
14 #ifdef RPC_DEBUG
15 # define RPCDBG_FACILITY        RPCDBG_AUTH
16 #endif
17
18 static struct rpc_auth null_auth;
19 static struct rpc_cred null_cred;
20
21 static struct rpc_auth *
22 nul_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
23 {
24         atomic_inc(&null_auth.au_count);
25         return &null_auth;
26 }
27
28 static void
29 nul_destroy(struct rpc_auth *auth)
30 {
31 }
32
33 /*
34  * Lookup NULL creds for current process
35  */
36 static struct rpc_cred *
37 nul_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  */
45 static void
46 nul_destroy_cred(struct rpc_cred *cred)
47 {
48 }
49
50 /*
51  * Match cred handle against current process
52  */
53 static int
54 nul_match(struct auth_cred *acred, struct rpc_cred *cred, int taskflags)
55 {
56         return 1;
57 }
58
59 /*
60  * Marshal credential.
61  */
62 static __be32 *
63 nul_marshal(struct rpc_task *task, __be32 *p)
64 {
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  */
76 static int
77 nul_refresh(struct rpc_task *task)
78 {
79         task->tk_msg.rpc_cred->cr_flags |= RPCAUTH_CRED_UPTODATE;
80         return 0;
81 }
82
83 static __be32 *
84 nul_validate(struct rpc_task *task, __be32 *p)
85 {
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
104 struct 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
115 static
116 struct rpc_auth null_auth = {
117         .au_cslack      = 4,
118         .au_rslack      = 2,
119         .au_ops         = &authnull_ops,
120         .au_flavor      = RPC_AUTH_NULL,
121         .au_count       = ATOMIC_INIT(0),
122 };
123
124 static
125 struct 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
134 static
135 struct 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 };