auth.h
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上传日期:2009-04-28
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文件大小:4k
- /*
- * linux/include/linux/sunrpc/auth.h
- *
- * Declarations for the RPC client authentication machinery.
- *
- * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
- */
- #ifndef _LINUX_SUNRPC_AUTH_H
- #define _LINUX_SUNRPC_AUTH_H
- #ifdef __KERNEL__
- #include <linux/config.h>
- #include <linux/sunrpc/sched.h>
- #include <linux/sunrpc/msg_prot.h>
- #include <linux/sunrpc/xdr.h>
- #include <asm/atomic.h>
- /* size of the nodename buffer */
- #define UNX_MAXNODENAME 32
- /* Maximum size (in bytes) of an rpc credential or verifier */
- #define RPC_MAX_AUTH_SIZE (400)
- /* Work around the lack of a VFS credential */
- struct auth_cred {
- uid_t uid;
- gid_t gid;
- struct group_info *group_info;
- };
- /*
- * Client user credentials
- */
- struct rpc_cred {
- struct hlist_node cr_hash; /* hash chain */
- struct rpc_credops * cr_ops;
- unsigned long cr_expire; /* when to gc */
- atomic_t cr_count; /* ref count */
- unsigned short cr_flags; /* various flags */
- #ifdef RPC_DEBUG
- unsigned long cr_magic; /* 0x0f4aa4f0 */
- #endif
- uid_t cr_uid;
- /* per-flavor data */
- };
- #define RPCAUTH_CRED_LOCKED 0x0001
- #define RPCAUTH_CRED_UPTODATE 0x0002
- #define RPCAUTH_CRED_MAGIC 0x0f4aa4f0
- /*
- * Client authentication handle
- */
- #define RPC_CREDCACHE_NR 8
- #define RPC_CREDCACHE_MASK (RPC_CREDCACHE_NR - 1)
- struct rpc_cred_cache {
- struct hlist_head hashtable[RPC_CREDCACHE_NR];
- unsigned long nextgc; /* next garbage collection */
- unsigned long expire; /* cache expiry interval */
- };
- struct rpc_auth {
- unsigned int au_cslack; /* call cred size estimate */
- unsigned int au_rslack; /* reply verf size guess */
- unsigned int au_flags; /* various flags */
- struct rpc_authops * au_ops; /* operations */
- rpc_authflavor_t au_flavor; /* pseudoflavor (note may
- * differ from the flavor in
- * au_ops->au_flavor in gss
- * case) */
- atomic_t au_count; /* Reference counter */
- struct rpc_cred_cache * au_credcache;
- /* per-flavor data */
- };
- #define RPC_AUTH_PROC_CREDS 0x0010 /* process creds (including
- * uid/gid, fs[ug]id, gids)
- */
- /*
- * Client authentication ops
- */
- struct rpc_authops {
- struct module *owner;
- rpc_authflavor_t au_flavor; /* flavor (RPC_AUTH_*) */
- #ifdef RPC_DEBUG
- char * au_name;
- #endif
- struct rpc_auth * (*create)(struct rpc_clnt *, rpc_authflavor_t);
- void (*destroy)(struct rpc_auth *);
- struct rpc_cred * (*lookup_cred)(struct rpc_auth *, struct auth_cred *, int);
- struct rpc_cred * (*crcreate)(struct rpc_auth*, struct auth_cred *, int);
- };
- struct rpc_credops {
- const char * cr_name; /* Name of the auth flavour */
- void (*crdestroy)(struct rpc_cred *);
- int (*crmatch)(struct auth_cred *, struct rpc_cred *, int);
- u32 * (*crmarshal)(struct rpc_task *, u32 *);
- int (*crrefresh)(struct rpc_task *);
- u32 * (*crvalidate)(struct rpc_task *, u32 *);
- int (*crwrap_req)(struct rpc_task *, kxdrproc_t,
- void *, u32 *, void *);
- int (*crunwrap_resp)(struct rpc_task *, kxdrproc_t,
- void *, u32 *, void *);
- };
- extern struct rpc_authops authunix_ops;
- extern struct rpc_authops authnull_ops;
- #ifdef CONFIG_SUNRPC_SECURE
- extern struct rpc_authops authdes_ops;
- #endif
- int rpcauth_register(struct rpc_authops *);
- int rpcauth_unregister(struct rpc_authops *);
- struct rpc_auth * rpcauth_create(rpc_authflavor_t, struct rpc_clnt *);
- void rpcauth_destroy(struct rpc_auth *);
- struct rpc_cred * rpcauth_lookup_credcache(struct rpc_auth *, struct auth_cred *, int);
- struct rpc_cred * rpcauth_lookupcred(struct rpc_auth *, int);
- struct rpc_cred * rpcauth_bindcred(struct rpc_task *);
- void rpcauth_holdcred(struct rpc_task *);
- void put_rpccred(struct rpc_cred *);
- void rpcauth_unbindcred(struct rpc_task *);
- u32 * rpcauth_marshcred(struct rpc_task *, u32 *);
- u32 * rpcauth_checkverf(struct rpc_task *, u32 *);
- int rpcauth_wrap_req(struct rpc_task *task, kxdrproc_t encode, void *rqstp, u32 *data, void *obj);
- int rpcauth_unwrap_resp(struct rpc_task *task, kxdrproc_t decode, void *rqstp, u32 *data, void *obj);
- int rpcauth_refreshcred(struct rpc_task *);
- void rpcauth_invalcred(struct rpc_task *);
- int rpcauth_uptodatecred(struct rpc_task *);
- int rpcauth_init_credcache(struct rpc_auth *, unsigned long);
- void rpcauth_free_credcache(struct rpc_auth *);
- static inline
- struct rpc_cred * get_rpccred(struct rpc_cred *cred)
- {
- atomic_inc(&cred->cr_count);
- return cred;
- }
- #endif /* __KERNEL__ */
- #endif /* _LINUX_SUNRPC_AUTH_H */