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1da177e4 LT |
1 | /* |
2 | * linux/include/linux/sunrpc/auth.h | |
3 | * | |
4 | * Declarations for the RPC client authentication machinery. | |
5 | * | |
6 | * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de> | |
7 | */ | |
8 | ||
9 | #ifndef _LINUX_SUNRPC_AUTH_H | |
10 | #define _LINUX_SUNRPC_AUTH_H | |
11 | ||
12 | #ifdef __KERNEL__ | |
13 | ||
14 | #include <linux/config.h> | |
15 | #include <linux/sunrpc/sched.h> | |
16 | #include <linux/sunrpc/msg_prot.h> | |
17 | #include <linux/sunrpc/xdr.h> | |
18 | ||
19 | #include <asm/atomic.h> | |
20 | ||
21 | /* size of the nodename buffer */ | |
22 | #define UNX_MAXNODENAME 32 | |
23 | ||
24 | /* Maximum size (in bytes) of an rpc credential or verifier */ | |
25 | #define RPC_MAX_AUTH_SIZE (400) | |
26 | ||
27 | /* Work around the lack of a VFS credential */ | |
28 | struct auth_cred { | |
29 | uid_t uid; | |
30 | gid_t gid; | |
31 | struct group_info *group_info; | |
32 | }; | |
33 | ||
34 | /* | |
35 | * Client user credentials | |
36 | */ | |
37 | struct rpc_cred { | |
38 | struct hlist_node cr_hash; /* hash chain */ | |
39 | struct rpc_credops * cr_ops; | |
40 | unsigned long cr_expire; /* when to gc */ | |
41 | atomic_t cr_count; /* ref count */ | |
42 | unsigned short cr_flags; /* various flags */ | |
43 | #ifdef RPC_DEBUG | |
44 | unsigned long cr_magic; /* 0x0f4aa4f0 */ | |
45 | #endif | |
46 | ||
47 | uid_t cr_uid; | |
48 | ||
49 | /* per-flavor data */ | |
50 | }; | |
51 | #define RPCAUTH_CRED_LOCKED 0x0001 | |
52 | #define RPCAUTH_CRED_UPTODATE 0x0002 | |
53 | ||
54 | #define RPCAUTH_CRED_MAGIC 0x0f4aa4f0 | |
55 | ||
56 | /* | |
57 | * Client authentication handle | |
58 | */ | |
59 | #define RPC_CREDCACHE_NR 8 | |
60 | #define RPC_CREDCACHE_MASK (RPC_CREDCACHE_NR - 1) | |
61 | struct rpc_cred_cache { | |
62 | struct hlist_head hashtable[RPC_CREDCACHE_NR]; | |
63 | unsigned long nextgc; /* next garbage collection */ | |
64 | unsigned long expire; /* cache expiry interval */ | |
65 | }; | |
66 | ||
67 | struct rpc_auth { | |
68 | unsigned int au_cslack; /* call cred size estimate */ | |
24b2605b BF |
69 | /* guess at number of u32's auth adds before |
70 | * reply data; normally the verifier size: */ | |
71 | unsigned int au_rslack; | |
72 | /* for gss, used to calculate au_rslack: */ | |
73 | unsigned int au_verfsize; | |
74 | ||
1da177e4 LT |
75 | unsigned int au_flags; /* various flags */ |
76 | struct rpc_authops * au_ops; /* operations */ | |
77 | rpc_authflavor_t au_flavor; /* pseudoflavor (note may | |
78 | * differ from the flavor in | |
79 | * au_ops->au_flavor in gss | |
80 | * case) */ | |
81 | atomic_t au_count; /* Reference counter */ | |
82 | ||
83 | struct rpc_cred_cache * au_credcache; | |
84 | /* per-flavor data */ | |
85 | }; | |
86 | #define RPC_AUTH_PROC_CREDS 0x0010 /* process creds (including | |
87 | * uid/gid, fs[ug]id, gids) | |
88 | */ | |
89 | ||
90 | /* | |
91 | * Client authentication ops | |
92 | */ | |
93 | struct rpc_authops { | |
94 | struct module *owner; | |
95 | rpc_authflavor_t au_flavor; /* flavor (RPC_AUTH_*) */ | |
96 | #ifdef RPC_DEBUG | |
97 | char * au_name; | |
98 | #endif | |
99 | struct rpc_auth * (*create)(struct rpc_clnt *, rpc_authflavor_t); | |
100 | void (*destroy)(struct rpc_auth *); | |
101 | ||
102 | struct rpc_cred * (*lookup_cred)(struct rpc_auth *, struct auth_cred *, int); | |
103 | struct rpc_cred * (*crcreate)(struct rpc_auth*, struct auth_cred *, int); | |
104 | }; | |
105 | ||
106 | struct rpc_credops { | |
107 | const char * cr_name; /* Name of the auth flavour */ | |
108 | void (*crdestroy)(struct rpc_cred *); | |
109 | ||
110 | int (*crmatch)(struct auth_cred *, struct rpc_cred *, int); | |
111 | u32 * (*crmarshal)(struct rpc_task *, u32 *); | |
112 | int (*crrefresh)(struct rpc_task *); | |
113 | u32 * (*crvalidate)(struct rpc_task *, u32 *); | |
114 | int (*crwrap_req)(struct rpc_task *, kxdrproc_t, | |
115 | void *, u32 *, void *); | |
116 | int (*crunwrap_resp)(struct rpc_task *, kxdrproc_t, | |
117 | void *, u32 *, void *); | |
118 | }; | |
119 | ||
120 | extern struct rpc_authops authunix_ops; | |
121 | extern struct rpc_authops authnull_ops; | |
122 | #ifdef CONFIG_SUNRPC_SECURE | |
123 | extern struct rpc_authops authdes_ops; | |
124 | #endif | |
125 | ||
126 | int rpcauth_register(struct rpc_authops *); | |
127 | int rpcauth_unregister(struct rpc_authops *); | |
128 | struct rpc_auth * rpcauth_create(rpc_authflavor_t, struct rpc_clnt *); | |
129 | void rpcauth_destroy(struct rpc_auth *); | |
130 | struct rpc_cred * rpcauth_lookup_credcache(struct rpc_auth *, struct auth_cred *, int); | |
131 | struct rpc_cred * rpcauth_lookupcred(struct rpc_auth *, int); | |
132 | struct rpc_cred * rpcauth_bindcred(struct rpc_task *); | |
133 | void rpcauth_holdcred(struct rpc_task *); | |
134 | void put_rpccred(struct rpc_cred *); | |
135 | void rpcauth_unbindcred(struct rpc_task *); | |
136 | u32 * rpcauth_marshcred(struct rpc_task *, u32 *); | |
137 | u32 * rpcauth_checkverf(struct rpc_task *, u32 *); | |
138 | int rpcauth_wrap_req(struct rpc_task *task, kxdrproc_t encode, void *rqstp, u32 *data, void *obj); | |
139 | int rpcauth_unwrap_resp(struct rpc_task *task, kxdrproc_t decode, void *rqstp, u32 *data, void *obj); | |
140 | int rpcauth_refreshcred(struct rpc_task *); | |
141 | void rpcauth_invalcred(struct rpc_task *); | |
142 | int rpcauth_uptodatecred(struct rpc_task *); | |
143 | int rpcauth_init_credcache(struct rpc_auth *, unsigned long); | |
144 | void rpcauth_free_credcache(struct rpc_auth *); | |
145 | ||
146 | static inline | |
147 | struct rpc_cred * get_rpccred(struct rpc_cred *cred) | |
148 | { | |
149 | atomic_inc(&cred->cr_count); | |
150 | return cred; | |
151 | } | |
152 | ||
153 | #endif /* __KERNEL__ */ | |
154 | #endif /* _LINUX_SUNRPC_AUTH_H */ |