kernel-aes67/include/linux/sunrpc/auth.h
Greg Banks 7adae489fe [PATCH] knfsd: Prepare knfsd for support of rsize/wsize of up to 1MB, over TCP
The limit over UDP remains at 32K.  Also, make some of the apparently
arbitrary sizing constants clearer.

The biggest change here involves replacing NFSSVC_MAXBLKSIZE by a function of
the rqstp.  This allows it to be different for different protocols (udp/tcp)
and also allows it to depend on the servers declared sv_bufsiz.

Note that we don't actually increase sv_bufsz for nfs yet.  That comes next.

Signed-off-by: Greg Banks <gnb@melbourne.sgi.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-04 07:55:16 -07:00

153 lines
4.5 KiB
C

/*
* 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/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
/* 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_NEW 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 */
/* guess at number of u32's auth adds before
* reply data; normally the verifier size: */
unsigned int au_rslack;
/* for gss, used to calculate au_rslack: */
unsigned int au_verfsize;
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 */
};
/* Flags for rpcauth_lookupcred() */
#define RPCAUTH_LOOKUP_NEW 0x01 /* Accept an uninitialised cred */
#define RPCAUTH_LOOKUP_ROOTCREDS 0x02 /* This really ought to go! */
/*
* 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 */
int (*cr_init)(struct rpc_auth *, struct rpc_cred *);
void (*crdestroy)(struct rpc_cred *);
int (*crmatch)(struct auth_cred *, struct rpc_cred *, int);
__be32 * (*crmarshal)(struct rpc_task *, __be32 *);
int (*crrefresh)(struct rpc_task *);
__be32 * (*crvalidate)(struct rpc_task *, __be32 *);
int (*crwrap_req)(struct rpc_task *, kxdrproc_t,
void *, __be32 *, void *);
int (*crunwrap_resp)(struct rpc_task *, kxdrproc_t,
void *, __be32 *, 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 *);
__be32 * rpcauth_marshcred(struct rpc_task *, __be32 *);
__be32 * rpcauth_checkverf(struct rpc_task *, __be32 *);
int rpcauth_wrap_req(struct rpc_task *task, kxdrproc_t encode, void *rqstp, __be32 *data, void *obj);
int rpcauth_unwrap_resp(struct rpc_task *task, kxdrproc_t decode, void *rqstp, __be32 *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 */