Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / net / sunrpc / auth_null.c
bloba5c36c01707baa3379bd32b29e23d0f5142887a3
1 /*
2 * linux/net/sunrpc/auth_null.c
4 * AUTH_NULL authentication. Really :-)
6 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
7 */
9 #include <linux/types.h>
10 #include <linux/module.h>
11 #include <linux/sunrpc/clnt.h>
13 #ifdef RPC_DEBUG
14 # define RPCDBG_FACILITY RPCDBG_AUTH
15 #endif
17 static struct rpc_auth null_auth;
18 static struct rpc_cred null_cred;
20 static struct rpc_auth *
21 nul_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
23 atomic_inc(&null_auth.au_count);
24 return &null_auth;
27 static void
28 nul_destroy(struct rpc_auth *auth)
33 * Lookup NULL creds for current process
35 static struct rpc_cred *
36 nul_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
38 return get_rpccred(&null_cred);
42 * Destroy cred handle.
44 static void
45 nul_destroy_cred(struct rpc_cred *cred)
50 * Match cred handle against current process
52 static int
53 nul_match(struct auth_cred *acred, struct rpc_cred *cred, int taskflags)
55 return 1;
59 * Marshal credential.
61 static __be32 *
62 nul_marshal(struct rpc_task *task, __be32 *p)
64 *p++ = htonl(RPC_AUTH_NULL);
65 *p++ = 0;
66 *p++ = htonl(RPC_AUTH_NULL);
67 *p++ = 0;
69 return p;
73 * Refresh credential. This is a no-op for AUTH_NULL
75 static int
76 nul_refresh(struct rpc_task *task)
78 set_bit(RPCAUTH_CRED_UPTODATE, &task->tk_rqstp->rq_cred->cr_flags);
79 return 0;
82 static __be32 *
83 nul_validate(struct rpc_task *task, __be32 *p)
85 rpc_authflavor_t flavor;
86 u32 size;
88 flavor = ntohl(*p++);
89 if (flavor != RPC_AUTH_NULL) {
90 printk("RPC: bad verf flavor: %u\n", flavor);
91 return NULL;
94 size = ntohl(*p++);
95 if (size != 0) {
96 printk("RPC: bad verf size: %u\n", size);
97 return NULL;
100 return p;
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,
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),
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,
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