2 * Generic RPC credential
4 * Copyright (C) 2008, Trond Myklebust <Trond.Myklebust@netapp.com>
8 #include <linux/types.h>
9 #include <linux/module.h>
10 #include <linux/sched.h>
11 #include <linux/sunrpc/auth.h>
12 #include <linux/sunrpc/clnt.h>
13 #include <linux/sunrpc/debug.h>
14 #include <linux/sunrpc/sched.h>
17 # define RPCDBG_FACILITY RPCDBG_AUTH
21 struct rpc_cred gc_base;
22 struct auth_cred acred;
25 static struct rpc_auth generic_auth;
26 static struct rpc_cred_cache generic_cred_cache;
27 static const struct rpc_credops generic_credops;
30 * Public call interface
32 struct rpc_cred *rpc_lookup_cred(void)
34 return rpcauth_lookupcred(&generic_auth, 0);
36 EXPORT_SYMBOL_GPL(rpc_lookup_cred);
39 generic_bind_cred(struct rpc_task *task, struct rpc_cred *cred)
41 struct rpc_auth *auth = task->tk_client->cl_auth;
42 struct auth_cred *acred = &container_of(cred, struct generic_cred, gc_base)->acred;
45 ret = auth->au_ops->lookup_cred(auth, acred, 0);
47 task->tk_msg.rpc_cred = ret;
49 task->tk_status = PTR_ERR(ret);
53 * Lookup generic creds for current process
55 static struct rpc_cred *
56 generic_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
58 return rpcauth_lookup_credcache(&generic_auth, acred, flags);
61 static struct rpc_cred *
62 generic_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
64 struct generic_cred *gcred;
66 gcred = kmalloc(sizeof(*gcred), GFP_KERNEL);
68 return ERR_PTR(-ENOMEM);
70 rpcauth_init_cred(&gcred->gc_base, acred, &generic_auth, &generic_credops);
71 gcred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_UPTODATE;
73 gcred->acred.uid = acred->uid;
74 gcred->acred.gid = acred->gid;
75 gcred->acred.group_info = acred->group_info;
76 if (gcred->acred.group_info != NULL)
77 get_group_info(gcred->acred.group_info);
79 dprintk("RPC: allocated generic cred %p for uid %d gid %d\n",
80 gcred, acred->uid, acred->gid);
81 return &gcred->gc_base;
85 generic_free_cred(struct rpc_cred *cred)
87 struct generic_cred *gcred = container_of(cred, struct generic_cred, gc_base);
89 dprintk("RPC: generic_free_cred %p\n", gcred);
90 if (gcred->acred.group_info != NULL)
91 put_group_info(gcred->acred.group_info);
96 generic_free_cred_callback(struct rcu_head *head)
98 struct rpc_cred *cred = container_of(head, struct rpc_cred, cr_rcu);
99 generic_free_cred(cred);
103 generic_destroy_cred(struct rpc_cred *cred)
105 call_rcu(&cred->cr_rcu, generic_free_cred_callback);
109 * Match credentials against current process creds.
112 generic_match(struct auth_cred *acred, struct rpc_cred *cred, int flags)
114 struct generic_cred *gcred = container_of(cred, struct generic_cred, gc_base);
116 if (gcred->acred.uid != acred->uid ||
117 gcred->acred.gid != acred->gid ||
118 gcred->acred.group_info != acred->group_info)
123 void __init rpc_init_generic_auth(void)
125 spin_lock_init(&generic_cred_cache.lock);
128 void __exit rpc_destroy_generic_auth(void)
130 rpcauth_clear_credcache(&generic_cred_cache);
133 static struct rpc_cred_cache generic_cred_cache = {
137 static const struct rpc_authops generic_auth_ops = {
138 .owner = THIS_MODULE,
139 .au_name = "Generic",
140 .lookup_cred = generic_lookup_cred,
141 .crcreate = generic_create_cred,
144 static struct rpc_auth generic_auth = {
145 .au_ops = &generic_auth_ops,
146 .au_count = ATOMIC_INIT(0),
147 .au_credcache = &generic_cred_cache,
150 static const struct rpc_credops generic_credops = {
151 .cr_name = "Generic cred",
152 .crdestroy = generic_destroy_cred,
153 .crbind = generic_bind_cred,
154 .crmatch = generic_match,