163 lines
4.8 KiB
C
163 lines
4.8 KiB
C
/*
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* linux/include/linux/sunrpc/auth.h
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*
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* Declarations for the RPC client authentication machinery.
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*
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* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
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*/
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#ifndef _LINUX_SUNRPC_AUTH_H
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#define _LINUX_SUNRPC_AUTH_H
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#ifdef __KERNEL__
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#include <linux/sunrpc/sched.h>
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#include <linux/sunrpc/msg_prot.h>
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#include <linux/sunrpc/xdr.h>
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#include <asm/atomic.h>
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#include <linux/rcupdate.h>
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/* size of the nodename buffer */
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#define UNX_MAXNODENAME 32
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/* Work around the lack of a VFS credential */
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struct auth_cred {
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uid_t uid;
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gid_t gid;
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struct group_info *group_info;
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};
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/*
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* Client user credentials
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*/
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struct rpc_auth;
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struct rpc_credops;
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struct rpc_cred {
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struct hlist_node cr_hash; /* hash chain */
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struct list_head cr_lru; /* lru garbage collection */
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struct rcu_head cr_rcu;
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struct rpc_auth * cr_auth;
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const struct rpc_credops *cr_ops;
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#ifdef RPC_DEBUG
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unsigned long cr_magic; /* 0x0f4aa4f0 */
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#endif
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unsigned long cr_expire; /* when to gc */
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unsigned long cr_flags; /* various flags */
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atomic_t cr_count; /* ref count */
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uid_t cr_uid;
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/* per-flavor data */
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};
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#define RPCAUTH_CRED_NEW 0
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#define RPCAUTH_CRED_UPTODATE 1
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#define RPCAUTH_CRED_HASHED 2
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#define RPCAUTH_CRED_MAGIC 0x0f4aa4f0
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/*
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* Client authentication handle
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*/
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#define RPC_CREDCACHE_NR 8
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#define RPC_CREDCACHE_MASK (RPC_CREDCACHE_NR - 1)
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struct rpc_cred_cache {
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struct hlist_head hashtable[RPC_CREDCACHE_NR];
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spinlock_t lock;
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};
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struct rpc_authops;
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struct rpc_auth {
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unsigned int au_cslack; /* call cred size estimate */
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/* guess at number of u32's auth adds before
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* reply data; normally the verifier size: */
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unsigned int au_rslack;
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/* for gss, used to calculate au_rslack: */
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unsigned int au_verfsize;
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unsigned int au_flags; /* various flags */
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const struct rpc_authops *au_ops; /* operations */
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rpc_authflavor_t au_flavor; /* pseudoflavor (note may
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* differ from the flavor in
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* au_ops->au_flavor in gss
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* case) */
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atomic_t au_count; /* Reference counter */
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struct rpc_cred_cache * au_credcache;
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/* per-flavor data */
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};
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/* Flags for rpcauth_lookupcred() */
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#define RPCAUTH_LOOKUP_NEW 0x01 /* Accept an uninitialised cred */
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#define RPCAUTH_LOOKUP_ROOTCREDS 0x02 /* This really ought to go! */
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/*
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* Client authentication ops
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*/
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struct rpc_authops {
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struct module *owner;
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rpc_authflavor_t au_flavor; /* flavor (RPC_AUTH_*) */
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#ifdef RPC_DEBUG
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char * au_name;
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#endif
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struct rpc_auth * (*create)(struct rpc_clnt *, rpc_authflavor_t);
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void (*destroy)(struct rpc_auth *);
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struct rpc_cred * (*lookup_cred)(struct rpc_auth *, struct auth_cred *, int);
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struct rpc_cred * (*crcreate)(struct rpc_auth*, struct auth_cred *, int);
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};
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struct rpc_credops {
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const char * cr_name; /* Name of the auth flavour */
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int (*cr_init)(struct rpc_auth *, struct rpc_cred *);
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void (*crdestroy)(struct rpc_cred *);
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int (*crmatch)(struct auth_cred *, struct rpc_cred *, int);
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__be32 * (*crmarshal)(struct rpc_task *, __be32 *);
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int (*crrefresh)(struct rpc_task *);
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__be32 * (*crvalidate)(struct rpc_task *, __be32 *);
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int (*crwrap_req)(struct rpc_task *, kxdrproc_t,
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void *, __be32 *, void *);
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int (*crunwrap_resp)(struct rpc_task *, kxdrproc_t,
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void *, __be32 *, void *);
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};
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extern const struct rpc_authops authunix_ops;
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extern const struct rpc_authops authnull_ops;
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void __init rpc_init_authunix(void);
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void __init rpcauth_init_module(void);
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void __exit rpcauth_remove_module(void);
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int rpcauth_register(const struct rpc_authops *);
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int rpcauth_unregister(const struct rpc_authops *);
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struct rpc_auth * rpcauth_create(rpc_authflavor_t, struct rpc_clnt *);
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void rpcauth_release(struct rpc_auth *);
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struct rpc_cred * rpcauth_lookup_credcache(struct rpc_auth *, struct auth_cred *, int);
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void rpcauth_init_cred(struct rpc_cred *, const struct auth_cred *, struct rpc_auth *, const struct rpc_credops *);
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struct rpc_cred * rpcauth_lookupcred(struct rpc_auth *, int);
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struct rpc_cred * rpcauth_bindcred(struct rpc_task *);
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void rpcauth_holdcred(struct rpc_task *);
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void put_rpccred(struct rpc_cred *);
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void rpcauth_unbindcred(struct rpc_task *);
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__be32 * rpcauth_marshcred(struct rpc_task *, __be32 *);
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__be32 * rpcauth_checkverf(struct rpc_task *, __be32 *);
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int rpcauth_wrap_req(struct rpc_task *task, kxdrproc_t encode, void *rqstp, __be32 *data, void *obj);
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int rpcauth_unwrap_resp(struct rpc_task *task, kxdrproc_t decode, void *rqstp, __be32 *data, void *obj);
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int rpcauth_refreshcred(struct rpc_task *);
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void rpcauth_invalcred(struct rpc_task *);
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int rpcauth_uptodatecred(struct rpc_task *);
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int rpcauth_init_credcache(struct rpc_auth *);
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void rpcauth_destroy_credcache(struct rpc_auth *);
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void rpcauth_clear_credcache(struct rpc_cred_cache *);
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static inline
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struct rpc_cred * get_rpccred(struct rpc_cred *cred)
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{
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atomic_inc(&cred->cr_count);
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return cred;
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}
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#endif /* __KERNEL__ */
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#endif /* _LINUX_SUNRPC_AUTH_H */
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