bluetooth: hid: make Android code conditional
[linux-2.6.git] / 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/sunrpc/clnt.h>
12
13 #ifdef RPC_DEBUG
14 # define RPCDBG_FACILITY        RPCDBG_AUTH
15 #endif
16
17 static struct rpc_auth null_auth;
18 static struct rpc_cred null_cred;
19
20 static struct rpc_auth *
21 nul_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
22 {
23         atomic_inc(&null_auth.au_count);
24         return &null_auth;
25 }
26
27 static void
28 nul_destroy(struct rpc_auth *auth)
29 {
30 }
31
32 /*
33  * Lookup NULL creds for current process
34  */
35 static struct rpc_cred *
36 nul_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
37 {
38         return get_rpccred(&null_cred);
39 }
40
41 /*
42  * Destroy cred handle.
43  */
44 static void
45 nul_destroy_cred(struct rpc_cred *cred)
46 {
47 }
48
49 /*
50  * Match cred handle against current process
51  */
52 static int
53 nul_match(struct auth_cred *acred, struct rpc_cred *cred, int taskflags)
54 {
55         return 1;
56 }
57
58 /*
59  * Marshal credential.
60  */
61 static __be32 *
62 nul_marshal(struct rpc_task *task, __be32 *p)
63 {
64         *p++ = htonl(RPC_AUTH_NULL);
65         *p++ = 0;
66         *p++ = htonl(RPC_AUTH_NULL);
67         *p++ = 0;
68
69         return p;
70 }
71
72 /*
73  * Refresh credential. This is a no-op for AUTH_NULL
74  */
75 static int
76 nul_refresh(struct rpc_task *task)
77 {
78         set_bit(RPCAUTH_CRED_UPTODATE, &task->tk_rqstp->rq_cred->cr_flags);
79         return 0;
80 }
81
82 static __be32 *
83 nul_validate(struct rpc_task *task, __be32 *p)
84 {
85         rpc_authflavor_t        flavor;
86         u32                     size;
87
88         flavor = ntohl(*p++);
89         if (flavor != RPC_AUTH_NULL) {
90                 printk("RPC: bad verf flavor: %u\n", flavor);
91                 return NULL;
92         }
93
94         size = ntohl(*p++);
95         if (size != 0) {
96                 printk("RPC: bad verf size: %u\n", size);
97                 return NULL;
98         }
99
100         return p;
101 }
102
103 const struct rpc_authops authnull_ops = {
104         .owner          = THIS_MODULE,
105         .au_flavor      = RPC_AUTH_NULL,
106         .au_name        = "NULL",
107         .create         = nul_create,
108         .destroy        = nul_destroy,
109         .lookup_cred    = nul_lookup_cred,
110 };
111
112 static
113 struct rpc_auth null_auth = {
114         .au_cslack      = 4,
115         .au_rslack      = 2,
116         .au_ops         = &authnull_ops,
117         .au_flavor      = RPC_AUTH_NULL,
118         .au_count       = ATOMIC_INIT(0),
119 };
120
121 static
122 const struct rpc_credops null_credops = {
123         .cr_name        = "AUTH_NULL",
124         .crdestroy      = nul_destroy_cred,
125         .crbind         = rpcauth_generic_bind_cred,
126         .crmatch        = nul_match,
127         .crmarshal      = nul_marshal,
128         .crrefresh      = nul_refresh,
129         .crvalidate     = nul_validate,
130 };
131
132 static
133 struct rpc_cred null_cred = {
134         .cr_lru         = LIST_HEAD_INIT(null_cred.cr_lru),
135         .cr_auth        = &null_auth,
136         .cr_ops         = &null_credops,
137         .cr_count       = ATOMIC_INIT(1),
138         .cr_flags       = 1UL << RPCAUTH_CRED_UPTODATE,
139 #ifdef RPC_DEBUG
140         .cr_magic       = RPCAUTH_CRED_MAGIC,
141 #endif
142 };