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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 423 | giacomo | 1 | /* |
| 2 | * linux/include/linux/sunrpc/auth.h |
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| 3 | * |
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| 4 | * Declarations for the RPC client authentication machinery. |
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| 5 | * |
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| 6 | * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de> |
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| 7 | */ |
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| 8 | |||
| 9 | #ifndef _LINUX_SUNRPC_AUTH_H |
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| 10 | #define _LINUX_SUNRPC_AUTH_H |
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| 11 | |||
| 12 | #ifdef __KERNEL__ |
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| 13 | |||
| 14 | #include <linux/config.h> |
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| 15 | #include <linux/sunrpc/sched.h> |
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| 16 | #include <linux/sunrpc/msg_prot.h> |
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| 17 | #include <linux/sunrpc/xdr.h> |
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| 18 | |||
| 19 | #include <asm/atomic.h> |
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| 20 | |||
| 21 | /* size of the nodename buffer */ |
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| 22 | #define UNX_MAXNODENAME 32 |
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| 23 | |||
| 24 | /* Maximum size (in bytes) of an rpc credential or verifier */ |
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| 25 | #define RPC_MAX_AUTH_SIZE (400) |
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| 26 | |||
| 27 | /* Work around the lack of a VFS credential */ |
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| 28 | struct auth_cred { |
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| 29 | uid_t uid; |
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| 30 | gid_t gid; |
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| 31 | int ngroups; |
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| 32 | gid_t *groups; |
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| 33 | }; |
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| 34 | |||
| 35 | /* |
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| 36 | * Client user credentials |
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| 37 | */ |
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| 38 | struct rpc_cred { |
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| 39 | struct list_head cr_hash; /* hash chain */ |
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| 40 | struct rpc_auth * cr_auth; |
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| 41 | struct rpc_credops * cr_ops; |
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| 42 | unsigned long cr_expire; /* when to gc */ |
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| 43 | atomic_t cr_count; /* ref count */ |
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| 44 | unsigned short cr_flags; /* various flags */ |
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| 45 | #ifdef RPC_DEBUG |
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| 46 | unsigned long cr_magic; /* 0x0f4aa4f0 */ |
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| 47 | #endif |
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| 48 | |||
| 49 | uid_t cr_uid; |
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| 50 | |||
| 51 | /* per-flavor data */ |
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| 52 | }; |
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| 53 | #define RPCAUTH_CRED_LOCKED 0x0001 |
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| 54 | #define RPCAUTH_CRED_UPTODATE 0x0002 |
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| 55 | #define RPCAUTH_CRED_DEAD 0x0004 |
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| 56 | |||
| 57 | #define RPCAUTH_CRED_MAGIC 0x0f4aa4f0 |
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| 58 | |||
| 59 | /* |
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| 60 | * Client authentication handle |
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| 61 | */ |
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| 62 | #define RPC_CREDCACHE_NR 8 |
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| 63 | #define RPC_CREDCACHE_MASK (RPC_CREDCACHE_NR - 1) |
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| 64 | struct rpc_auth { |
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| 65 | struct list_head au_credcache[RPC_CREDCACHE_NR]; |
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| 66 | unsigned long au_expire; /* cache expiry interval */ |
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| 67 | unsigned long au_nextgc; /* next garbage collection */ |
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| 68 | unsigned int au_cslack; /* call cred size estimate */ |
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| 69 | unsigned int au_rslack; /* reply verf size guess */ |
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| 70 | unsigned int au_flags; /* various flags */ |
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| 71 | struct rpc_authops * au_ops; /* operations */ |
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| 72 | rpc_authflavor_t au_flavor; /* pseudoflavor (note may |
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| 73 | * differ from the flavor in |
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| 74 | * au_ops->au_flavor in gss |
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| 75 | * case) */ |
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| 76 | |||
| 77 | /* per-flavor data */ |
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| 78 | }; |
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| 79 | #define RPC_AUTH_PROC_CREDS 0x0010 /* process creds (including |
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| 80 | * uid/gid, fs[ug]id, gids) |
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| 81 | */ |
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| 82 | |||
| 83 | /* |
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| 84 | * Client authentication ops |
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| 85 | */ |
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| 86 | struct rpc_authops { |
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| 87 | struct module *owner; |
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| 88 | rpc_authflavor_t au_flavor; /* flavor (RPC_AUTH_*) */ |
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| 89 | #ifdef RPC_DEBUG |
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| 90 | char * au_name; |
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| 91 | #endif |
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| 92 | struct rpc_auth * (*create)(struct rpc_clnt *, rpc_authflavor_t); |
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| 93 | void (*destroy)(struct rpc_auth *); |
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| 94 | |||
| 95 | struct rpc_cred * (*crcreate)(struct rpc_auth*, struct auth_cred *, int); |
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| 96 | }; |
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| 97 | |||
| 98 | struct rpc_credops { |
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| 99 | void (*crdestroy)(struct rpc_cred *); |
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| 100 | |||
| 101 | int (*crmatch)(struct auth_cred *, struct rpc_cred *, int); |
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| 102 | u32 * (*crmarshal)(struct rpc_task *, u32 *, int); |
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| 103 | int (*crrefresh)(struct rpc_task *); |
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| 104 | u32 * (*crvalidate)(struct rpc_task *, u32 *); |
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| 105 | }; |
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| 106 | |||
| 107 | extern struct rpc_authops authunix_ops; |
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| 108 | extern struct rpc_authops authnull_ops; |
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| 109 | #ifdef CONFIG_SUNRPC_SECURE |
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| 110 | extern struct rpc_authops authdes_ops; |
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| 111 | #endif |
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| 112 | |||
| 113 | u32 pseudoflavor_to_flavor(rpc_authflavor_t); |
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| 114 | |||
| 115 | int rpcauth_register(struct rpc_authops *); |
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| 116 | int rpcauth_unregister(struct rpc_authops *); |
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| 117 | struct rpc_auth * rpcauth_create(rpc_authflavor_t, struct rpc_clnt *); |
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| 118 | void rpcauth_destroy(struct rpc_auth *); |
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| 119 | struct rpc_cred * rpcauth_lookup_credcache(struct rpc_auth *, struct auth_cred *, int); |
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| 120 | struct rpc_cred * rpcauth_lookupcred(struct rpc_auth *, int); |
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| 121 | struct rpc_cred * rpcauth_bindcred(struct rpc_task *); |
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| 122 | void rpcauth_holdcred(struct rpc_task *); |
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| 123 | void put_rpccred(struct rpc_cred *); |
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| 124 | void rpcauth_unbindcred(struct rpc_task *); |
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| 125 | u32 * rpcauth_marshcred(struct rpc_task *, u32 *); |
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| 126 | u32 * rpcauth_checkverf(struct rpc_task *, u32 *); |
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| 127 | int rpcauth_refreshcred(struct rpc_task *); |
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| 128 | void rpcauth_invalcred(struct rpc_task *); |
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| 129 | int rpcauth_uptodatecred(struct rpc_task *); |
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| 130 | int rpcauth_deadcred(struct rpc_task *); |
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| 131 | void rpcauth_init_credcache(struct rpc_auth *); |
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| 132 | void rpcauth_free_credcache(struct rpc_auth *); |
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| 133 | |||
| 134 | static inline |
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| 135 | struct rpc_cred * get_rpccred(struct rpc_cred *cred) |
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| 136 | { |
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| 137 | atomic_inc(&cred->cr_count); |
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| 138 | return cred; |
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| 139 | } |
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| 140 | |||
| 141 | #endif /* __KERNEL__ */ |
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| 142 | #endif /* _LINUX_SUNRPC_AUTH_H */ |