2 * linux/include/linux/sunrpc/auth.h
4 * Declarations for the RPC client authentication machinery.
6 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
9 #ifndef _LINUX_SUNRPC_AUTH_H
10 #define _LINUX_SUNRPC_AUTH_H
14 #include <linux/sunrpc/sched.h>
15 #include <linux/sunrpc/msg_prot.h>
16 #include <linux/sunrpc/xdr.h>
18 #include <asm/atomic.h>
19 #include <linux/rcupdate.h>
21 /* size of the nodename buffer */
22 #define UNX_MAXNODENAME 32
24 /* Work around the lack of a VFS credential */
28 struct group_info *group_info;
32 * Client user credentials
37 struct hlist_node cr_hash; /* hash chain */
38 struct list_head cr_lru; /* lru garbage collection */
39 struct rcu_head cr_rcu;
40 struct rpc_auth * cr_auth;
41 const struct rpc_credops *cr_ops;
43 unsigned long cr_magic; /* 0x0f4aa4f0 */
45 unsigned long cr_expire; /* when to gc */
46 unsigned long cr_flags; /* various flags */
47 atomic_t cr_count; /* ref count */
53 #define RPCAUTH_CRED_NEW 0
54 #define RPCAUTH_CRED_UPTODATE 1
55 #define RPCAUTH_CRED_HASHED 2
57 #define RPCAUTH_CRED_MAGIC 0x0f4aa4f0
60 * Client authentication handle
62 #define RPC_CREDCACHE_NR 8
63 #define RPC_CREDCACHE_MASK (RPC_CREDCACHE_NR - 1)
64 struct rpc_cred_cache {
65 struct hlist_head hashtable[RPC_CREDCACHE_NR];
66 unsigned long nextgc; /* next garbage collection */
67 unsigned long expire; /* cache expiry interval */
72 unsigned int au_cslack; /* call cred size estimate */
73 /* guess at number of u32's auth adds before
74 * reply data; normally the verifier size: */
75 unsigned int au_rslack;
76 /* for gss, used to calculate au_rslack: */
77 unsigned int au_verfsize;
79 unsigned int au_flags; /* various flags */
80 const struct rpc_authops *au_ops; /* operations */
81 rpc_authflavor_t au_flavor; /* pseudoflavor (note may
82 * differ from the flavor in
83 * au_ops->au_flavor in gss
85 atomic_t au_count; /* Reference counter */
87 struct rpc_cred_cache * au_credcache;
91 /* Flags for rpcauth_lookupcred() */
92 #define RPCAUTH_LOOKUP_NEW 0x01 /* Accept an uninitialised cred */
93 #define RPCAUTH_LOOKUP_ROOTCREDS 0x02 /* This really ought to go! */
96 * Client authentication ops
100 rpc_authflavor_t au_flavor; /* flavor (RPC_AUTH_*) */
104 struct rpc_auth * (*create)(struct rpc_clnt *, rpc_authflavor_t);
105 void (*destroy)(struct rpc_auth *);
107 struct rpc_cred * (*lookup_cred)(struct rpc_auth *, struct auth_cred *, int);
108 struct rpc_cred * (*crcreate)(struct rpc_auth*, struct auth_cred *, int);
112 const char * cr_name; /* Name of the auth flavour */
113 int (*cr_init)(struct rpc_auth *, struct rpc_cred *);
114 void (*crdestroy)(struct rpc_cred *);
116 int (*crmatch)(struct auth_cred *, struct rpc_cred *, int);
117 __be32 * (*crmarshal)(struct rpc_task *, __be32 *);
118 int (*crrefresh)(struct rpc_task *);
119 __be32 * (*crvalidate)(struct rpc_task *, __be32 *);
120 int (*crwrap_req)(struct rpc_task *, kxdrproc_t,
121 void *, __be32 *, void *);
122 int (*crunwrap_resp)(struct rpc_task *, kxdrproc_t,
123 void *, __be32 *, void *);
126 extern const struct rpc_authops authunix_ops;
127 extern const struct rpc_authops authnull_ops;
129 int rpcauth_register(const struct rpc_authops *);
130 int rpcauth_unregister(const struct rpc_authops *);
131 struct rpc_auth * rpcauth_create(rpc_authflavor_t, struct rpc_clnt *);
132 void rpcauth_release(struct rpc_auth *);
133 struct rpc_cred * rpcauth_lookup_credcache(struct rpc_auth *, struct auth_cred *, int);
134 void rpcauth_init_cred(struct rpc_cred *, const struct auth_cred *, struct rpc_auth *, const struct rpc_credops *);
135 struct rpc_cred * rpcauth_lookupcred(struct rpc_auth *, int);
136 struct rpc_cred * rpcauth_bindcred(struct rpc_task *);
137 void rpcauth_holdcred(struct rpc_task *);
138 void put_rpccred(struct rpc_cred *);
139 void rpcauth_unbindcred(struct rpc_task *);
140 __be32 * rpcauth_marshcred(struct rpc_task *, __be32 *);
141 __be32 * rpcauth_checkverf(struct rpc_task *, __be32 *);
142 int rpcauth_wrap_req(struct rpc_task *task, kxdrproc_t encode, void *rqstp, __be32 *data, void *obj);
143 int rpcauth_unwrap_resp(struct rpc_task *task, kxdrproc_t decode, void *rqstp, __be32 *data, void *obj);
144 int rpcauth_refreshcred(struct rpc_task *);
145 void rpcauth_invalcred(struct rpc_task *);
146 int rpcauth_uptodatecred(struct rpc_task *);
147 int rpcauth_init_credcache(struct rpc_auth *, unsigned long);
148 void rpcauth_destroy_credcache(struct rpc_auth *);
149 void rpcauth_clear_credcache(struct rpc_cred_cache *);
152 struct rpc_cred * get_rpccred(struct rpc_cred *cred)
154 atomic_inc(&cred->cr_count);
158 #endif /* __KERNEL__ */
159 #endif /* _LINUX_SUNRPC_AUTH_H */