[linux-2.6-block.git] / include / linux / sunrpc / svc.h

/*
 * linux/include/linux/sunrpc/svc.h
 *
 * RPC server declarations.
 *
 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
 */


#ifndef SUNRPC_SVC_H
#define SUNRPC_SVC_H

#include <linux/in.h>
#include <linux/sunrpc/types.h>
#include <linux/sunrpc/xdr.h>
#include <linux/sunrpc/svcauth.h>
#include <linux/wait.h>
#include <linux/mm.h>

/*
 * RPC service.
 *
 * An RPC service is a ``daemon,'' possibly multithreaded, which
 * receives and processes incoming RPC messages.
 * It has one or more transport sockets associated with it, and maintains
 * a list of idle threads waiting for input.
 *
 * We currently do not support more than one RPC program per daemon.
 */
struct svc_serv {
	struct list_head	sv_threads;	/* idle server threads */
	struct list_head	sv_sockets;	/* pending sockets */
	struct svc_program *	sv_program;	/* RPC program */
	struct svc_stat *	sv_stats;	/* RPC statistics */
	spinlock_t		sv_lock;
	unsigned int		sv_nrthreads;	/* # of server threads */
	unsigned int		sv_bufsz;	/* datagram buffer size */
	unsigned int		sv_xdrsize;	/* XDR buffer size */

	struct list_head	sv_permsocks;	/* all permanent sockets */
	struct list_head	sv_tempsocks;	/* all temporary sockets */
	int			sv_tmpcnt;	/* count of temporary sockets */

	char *			sv_name;	/* service name */
};

/*
 * Maximum payload size supported by a kernel RPC server.
 * This is use to determine the max number of pages nfsd is
 * willing to return in a single READ operation.
 */
#define RPCSVC_MAXPAYLOAD	(64*1024u)

/*
 * RPC Requsts and replies are stored in one or more pages.
 * We maintain an array of pages for each server thread.
 * Requests are copied into these pages as they arrive.  Remaining
 * pages are available to write the reply into.
 *
 * Pages are sent using ->sendpage so each server thread needs to
 * allocate more to replace those used in sending.  To help keep track
 * of these pages we have a receive list where all pages initialy live,
 * and a send list where pages are moved to when there are to be part
 * of a reply.
 *
 * We use xdr_buf for holding responses as it fits well with NFS
 * read responses (that have a header, and some data pages, and possibly
 * a tail) and means we can share some client side routines.
 *
 * The xdr_buf.head kvec always points to the first page in the rq_*pages
 * list.  The xdr_buf.pages pointer points to the second page on that
 * list.  xdr_buf.tail points to the end of the first page.
 * This assumes that the non-page part of an rpc reply will fit
 * in a page - NFSd ensures this.  lockd also has no trouble.
 *
 * Each request/reply pair can have at most one "payload", plus two pages,
 * one for the request, and one for the reply.
 */
#define RPCSVC_MAXPAGES		((RPCSVC_MAXPAYLOAD+PAGE_SIZE-1)/PAGE_SIZE + 2)

static inline u32 svc_getnl(struct kvec *iov)
{
	__be32 val, *vp;
	vp = iov->iov_base;
	val = *vp++;
	iov->iov_base = (void*)vp;
	iov->iov_len -= sizeof(__be32);
	return ntohl(val);
}

static inline void svc_putnl(struct kvec *iov, u32 val)
{
	__be32 *vp = iov->iov_base + iov->iov_len;
	*vp = htonl(val);
	iov->iov_len += sizeof(__be32);
}

static inline __be32 svc_getu32(struct kvec *iov)
{
	__be32 val, *vp;
	vp = iov->iov_base;
	val = *vp++;
	iov->iov_base = (void*)vp;
	iov->iov_len -= sizeof(__be32);
	return val;
}

static inline void svc_ungetu32(struct kvec *iov)
{
	__be32 *vp = (__be32 *)iov->iov_base;
	iov->iov_base = (void *)(vp - 1);
	iov->iov_len += sizeof(*vp);
}

static inline void svc_putu32(struct kvec *iov, __be32 val)
{
	__be32 *vp = iov->iov_base + iov->iov_len;
	*vp = val;
	iov->iov_len += sizeof(__be32);
}

	
/*
 * The context of a single thread, including the request currently being
 * processed.
 * NOTE: First two items must be prev/next.
 */
struct svc_rqst {
	struct list_head	rq_list;	/* idle list */
	struct svc_sock *	rq_sock;	/* socket */
	struct sockaddr_in	rq_addr;	/* peer address */
	int			rq_addrlen;

	struct svc_serv *	rq_server;	/* RPC service definition */
	struct svc_procedure *	rq_procinfo;	/* procedure info */
	struct auth_ops *	rq_authop;	/* authentication flavour */
	struct svc_cred		rq_cred;	/* auth info */
	struct sk_buff *	rq_skbuff;	/* fast recv inet buffer */
	struct svc_deferred_req*rq_deferred;	/* deferred request we are replaying */

	struct xdr_buf		rq_arg;
	struct xdr_buf		rq_res;
	struct page *		rq_argpages[RPCSVC_MAXPAGES];
	struct page *		rq_respages[RPCSVC_MAXPAGES];
	int			rq_restailpage;
	short			rq_argused;	/* pages used for argument */
	short			rq_arghi;	/* pages available in argument page list */
	short			rq_resused;	/* pages used for result */

	u32			rq_xid;		/* transmission id */
	u32			rq_prog;	/* program number */
	u32			rq_vers;	/* program version */
	u32			rq_proc;	/* procedure number */
	u32			rq_prot;	/* IP protocol */
	unsigned short
				rq_secure  : 1;	/* secure port */


	__u32			rq_daddr;	/* dest addr of request - reply from here */

	void *			rq_argp;	/* decoded arguments */
	void *			rq_resp;	/* xdr'd results */
	void *			rq_auth_data;	/* flavor-specific data */

	int			rq_reserved;	/* space on socket outq
						 * reserved for this request
						 */

	struct cache_req	rq_chandle;	/* handle passed to caches for 
						 * request delaying 
						 */
	/* Catering to nfsd */
	struct auth_domain *	rq_client;	/* RPC peer info */
	struct svc_cacherep *	rq_cacherep;	/* cache info */
	struct knfsd_fh *	rq_reffh;	/* Referrence filehandle, used to
						 * determine what device number
						 * to report (real or virtual)
						 */
	int			rq_sendfile_ok; /* turned off in gss privacy
						 * to prevent encrypting page
						 * cache pages */
	wait_queue_head_t	rq_wait;	/* synchronization */
};

/*
 * Check buffer bounds after decoding arguments
 */
static inline int
xdr_argsize_check(struct svc_rqst *rqstp, u32 *p)
{
	char *cp = (char *)p;
	struct kvec *vec = &rqstp->rq_arg.head[0];
	return cp >= (char*)vec->iov_base
		&& cp <= (char*)vec->iov_base + vec->iov_len;
}

static inline int
xdr_ressize_check(struct svc_rqst *rqstp, u32 *p)
{
	struct kvec *vec = &rqstp->rq_res.head[0];
	char *cp = (char*)p;

	vec->iov_len = cp - (char*)vec->iov_base;

	return vec->iov_len <= PAGE_SIZE;
}

static inline struct page *
svc_take_res_page(struct svc_rqst *rqstp)
{
	if (rqstp->rq_arghi <= rqstp->rq_argused)
		return NULL;
	rqstp->rq_arghi--;
	rqstp->rq_respages[rqstp->rq_resused] =
		rqstp->rq_argpages[rqstp->rq_arghi];
	return rqstp->rq_respages[rqstp->rq_resused++];
}

static inline void svc_take_page(struct svc_rqst *rqstp)
{
	if (rqstp->rq_arghi <= rqstp->rq_argused) {
		WARN_ON(1);
		return;
	}
	rqstp->rq_arghi--;
	rqstp->rq_respages[rqstp->rq_resused] =
		rqstp->rq_argpages[rqstp->rq_arghi];
	rqstp->rq_resused++;
}

static inline void svc_pushback_allpages(struct svc_rqst *rqstp)
{
        while (rqstp->rq_resused) {
		if (rqstp->rq_respages[--rqstp->rq_resused] == NULL)
			continue;
		rqstp->rq_argpages[rqstp->rq_arghi++] =
			rqstp->rq_respages[rqstp->rq_resused];
		rqstp->rq_respages[rqstp->rq_resused] = NULL;
	}
}

static inline void svc_pushback_unused_pages(struct svc_rqst *rqstp)
{
	while (rqstp->rq_resused &&
	       rqstp->rq_res.pages != &rqstp->rq_respages[rqstp->rq_resused]) {

		if (rqstp->rq_respages[--rqstp->rq_resused] != NULL) {
			rqstp->rq_argpages[rqstp->rq_arghi++] =
				rqstp->rq_respages[rqstp->rq_resused];
			rqstp->rq_respages[rqstp->rq_resused] = NULL;
		}
	}
}

static inline void svc_free_allpages(struct svc_rqst *rqstp)
{
        while (rqstp->rq_resused) {
		if (rqstp->rq_respages[--rqstp->rq_resused] == NULL)
			continue;
		put_page(rqstp->rq_respages[rqstp->rq_resused]);
		rqstp->rq_respages[rqstp->rq_resused] = NULL;
	}
}

struct svc_deferred_req {
	u32			prot;	/* protocol (UDP or TCP) */
	struct sockaddr_in	addr;
	struct svc_sock		*svsk;	/* where reply must go */
	u32			daddr;	/* where reply must come from */
	struct cache_deferred_req handle;
	int			argslen;
	u32			args[0];
};

/*
 * List of RPC programs on the same transport endpoint
 */
struct svc_program {
	struct svc_program *	pg_next;	/* other programs (same xprt) */
	u32			pg_prog;	/* program number */
	unsigned int		pg_lovers;	/* lowest version */
	unsigned int		pg_hivers;	/* lowest version */
	unsigned int		pg_nvers;	/* number of versions */
	struct svc_version **	pg_vers;	/* version array */
	char *			pg_name;	/* service name */
	char *			pg_class;	/* class name: services sharing authentication */
	struct svc_stat *	pg_stats;	/* rpc statistics */
	int			(*pg_authenticate)(struct svc_rqst *);
};

/*
 * RPC program version
 */
struct svc_version {
	u32			vs_vers;	/* version number */
	u32			vs_nproc;	/* number of procedures */
	struct svc_procedure *	vs_proc;	/* per-procedure info */
	u32			vs_xdrsize;	/* xdrsize needed for this version */

	/* Override dispatch function (e.g. when caching replies).
	 * A return value of 0 means drop the request. 
	 * vs_dispatch == NULL means use default dispatcher.
	 */
	int			(*vs_dispatch)(struct svc_rqst *, u32 *);
};

/*
 * RPC procedure info
 */
typedef int	(*svc_procfunc)(struct svc_rqst *, void *argp, void *resp);
struct svc_procedure {
	svc_procfunc		pc_func;	/* process the request */
	kxdrproc_t		pc_decode;	/* XDR decode args */
	kxdrproc_t		pc_encode;	/* XDR encode result */
	kxdrproc_t		pc_release;	/* XDR free result */
	unsigned int		pc_argsize;	/* argument struct size */
	unsigned int		pc_ressize;	/* result struct size */
	unsigned int		pc_count;	/* call count */
	unsigned int		pc_cachetype;	/* cache info (NFS) */
	unsigned int		pc_xdrressize;	/* maximum size of XDR reply */
};

/*
 * This is the RPC server thread function prototype
 */
typedef void		(*svc_thread_fn)(struct svc_rqst *);

/*
 * Function prototypes.
 */
struct svc_serv *  svc_create(struct svc_program *, unsigned int);
int		   svc_create_thread(svc_thread_fn, struct svc_serv *);
void		   svc_exit_thread(struct svc_rqst *);
void		   svc_destroy(struct svc_serv *);
int		   svc_process(struct svc_serv *, struct svc_rqst *);
int		   svc_register(struct svc_serv *, int, unsigned short);
void		   svc_wake_up(struct svc_serv *);
void		   svc_reserve(struct svc_rqst *rqstp, int space);

#endif /* SUNRPC_SVC_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/include/linux/sunrpc/svc.h
	3	*
	4	* RPC server declarations.
	5	*
	6	* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
	7	*/
	8
	9
	10	#ifndef SUNRPC_SVC_H
	11	#define SUNRPC_SVC_H
	12
	13	#include <linux/in.h>
	14	#include <linux/sunrpc/types.h>
	15	#include <linux/sunrpc/xdr.h>
	16	#include <linux/sunrpc/svcauth.h>
	17	#include <linux/wait.h>
	18	#include <linux/mm.h>
	19
	20	/*
	21	* RPC service.
	22	*
	23	* An RPC service is a ``daemon,'' possibly multithreaded, which
	24	* receives and processes incoming RPC messages.
	25	* It has one or more transport sockets associated with it, and maintains
	26	* a list of idle threads waiting for input.
	27	*
	28	* We currently do not support more than one RPC program per daemon.
	29	*/
	30	struct svc_serv {
	31	struct list_head sv_threads; /* idle server threads */
	32	struct list_head sv_sockets; /* pending sockets */
	33	struct svc_program * sv_program; /* RPC program */
	34	struct svc_stat * sv_stats; /* RPC statistics */
	35	spinlock_t sv_lock;
	36	unsigned int sv_nrthreads; /* # of server threads */
	37	unsigned int sv_bufsz; /* datagram buffer size */
	38	unsigned int sv_xdrsize; /* XDR buffer size */
	39
	40	struct list_head sv_permsocks; /* all permanent sockets */
	41	struct list_head sv_tempsocks; /* all temporary sockets */
	42	int sv_tmpcnt; /* count of temporary sockets */
	43
	44	char * sv_name; /* service name */
	45	};
	46
	47	/*
	48	* Maximum payload size supported by a kernel RPC server.
	49	* This is use to determine the max number of pages nfsd is
	50	* willing to return in a single READ operation.
	51	*/
	52	#define RPCSVC_MAXPAYLOAD (64*1024u)
	53
	54	/*
	55	* RPC Requsts and replies are stored in one or more pages.
	56	* We maintain an array of pages for each server thread.
	57	* Requests are copied into these pages as they arrive. Remaining
	58	* pages are available to write the reply into.
	59	*
	60	* Pages are sent using ->sendpage so each server thread needs to
	61	* allocate more to replace those used in sending. To help keep track
	62	* of these pages we have a receive list where all pages initialy live,
	63	* and a send list where pages are moved to when there are to be part
	64	* of a reply.
65	*
66	* We use xdr_buf for holding responses as it fits well with NFS
67	* read responses (that have a header, and some data pages, and possibly
68	* a tail) and means we can share some client side routines.
69	*
70	* The xdr_buf.head kvec always points to the first page in the rq_*pages
71	* list. The xdr_buf.pages pointer points to the second page on that
72	* list. xdr_buf.tail points to the end of the first page.
73	* This assumes that the non-page part of an rpc reply will fit
74	* in a page - NFSd ensures this. lockd also has no trouble.
75	*
76	* Each request/reply pair can have at most one "payload", plus two pages,
77	* one for the request, and one for the reply.
78	*/
79	#define RPCSVC_MAXPAGES ((RPCSVC_MAXPAYLOAD+PAGE_SIZE-1)/PAGE_SIZE + 2)
80
76994313	81	static inline u32 svc_getnl(struct kvec *iov)
1da177e4	82	{
76994313	83	__be32 val, *vp;
1da177e4 LT	84	vp = iov->iov_base;
	85	val = *vp++;
	86	iov->iov_base = (void*)vp;
76994313 AD	87	iov->iov_len -= sizeof(__be32);
	88	return ntohl(val);
	89	}
	90
	91	static inline void svc_putnl(struct kvec *iov, u32 val)
	92	{
	93	__be32 *vp = iov->iov_base + iov->iov_len;
	94	*vp = htonl(val);
	95	iov->iov_len += sizeof(__be32);
	96	}
	97
	98	static inline __be32 svc_getu32(struct kvec *iov)
	99	{
	100	__be32 val, *vp;
	101	vp = iov->iov_base;
	102	val = *vp++;
	103	iov->iov_base = (void*)vp;
	104	iov->iov_len -= sizeof(__be32);
1da177e4 LT	105	return val;
	106	}
	107
	108	static inline void svc_ungetu32(struct kvec *iov)
	109	{
76994313	110	__be32 vp = (__be32 )iov->iov_base;
1da177e4 LT	111	iov->iov_base = (void *)(vp - 1);
	112	iov->iov_len += sizeof(*vp);
	113	}
	114
76994313	115	static inline void svc_putu32(struct kvec *iov, __be32 val)
1da177e4	116	{
76994313	117	__be32 *vp = iov->iov_base + iov->iov_len;
1da177e4	118	*vp = val;
76994313	119	iov->iov_len += sizeof(__be32);
1da177e4 LT	120	}
	121
	122
	123	/*
	124	* The context of a single thread, including the request currently being
	125	* processed.
	126	* NOTE: First two items must be prev/next.
	127	*/
	128	struct svc_rqst {
	129	struct list_head rq_list; /* idle list */
	130	struct svc_sock * rq_sock; /* socket */
	131	struct sockaddr_in rq_addr; /* peer address */
	132	int rq_addrlen;
	133
	134	struct svc_serv * rq_server; /* RPC service definition */
	135	struct svc_procedure * rq_procinfo; /* procedure info */
	136	struct auth_ops * rq_authop; /* authentication flavour */
	137	struct svc_cred rq_cred; /* auth info */
	138	struct sk_buff * rq_skbuff; /* fast recv inet buffer */
	139	struct svc_deferred_reqrq_deferred; / deferred request we are replaying */
	140
	141	struct xdr_buf rq_arg;
	142	struct xdr_buf rq_res;
	143	struct page * rq_argpages[RPCSVC_MAXPAGES];
	144	struct page * rq_respages[RPCSVC_MAXPAGES];
	145	int rq_restailpage;
	146	short rq_argused; /* pages used for argument */
	147	short rq_arghi; /* pages available in argument page list */
	148	short rq_resused; /* pages used for result */
	149
	150	u32 rq_xid; /* transmission id */
	151	u32 rq_prog; /* program number */
	152	u32 rq_vers; /* program version */
	153	u32 rq_proc; /* procedure number */
	154	u32 rq_prot; /* IP protocol */
	155	unsigned short
	156	rq_secure : 1; /* secure port */
	157
	158
	159	__u32 rq_daddr; /* dest addr of request - reply from here */
	160
	161	void * rq_argp; /* decoded arguments */
	162	void * rq_resp; /* xdr'd results */
	163	void * rq_auth_data; /* flavor-specific data */
	164
	165	int rq_reserved; /* space on socket outq
	166	* reserved for this request
	167	*/
	168
	169	struct cache_req rq_chandle; /* handle passed to caches for
	170	* request delaying
	171	*/
	172	/* Catering to nfsd */
	173	struct auth_domain * rq_client; /* RPC peer info */
	174	struct svc_cacherep * rq_cacherep; /* cache info */
	175	struct knfsd_fh * rq_reffh; /* Referrence filehandle, used to
	176	* determine what device number
	177	* to report (real or virtual)
	178	*/
5c04c46a BF	179	int rq_sendfile_ok; /* turned off in gss privacy
	180	* to prevent encrypting page
	181	* cache pages */
1da177e4 LT	182	wait_queue_head_t rq_wait; /* synchronization */
	183	};
	184
	185	/*
	186	* Check buffer bounds after decoding arguments
	187	*/
	188	static inline int
	189	xdr_argsize_check(struct svc_rqst rqstp, u32 p)
	190	{
	191	char cp = (char )p;
	192	struct kvec *vec = &rqstp->rq_arg.head[0];
0ba7536d N	193	return cp >= (char*)vec->iov_base
0ba7536d N	194	&& cp <= (char*)vec->iov_base + vec->iov_len;
1da177e4 LT	195	}
	196
	197	static inline int
	198	xdr_ressize_check(struct svc_rqst rqstp, u32 p)
	199	{
	200	struct kvec *vec = &rqstp->rq_res.head[0];
	201	char cp = (char)p;
	202
	203	vec->iov_len = cp - (char*)vec->iov_base;
	204
	205	return vec->iov_len <= PAGE_SIZE;
	206	}
	207
a257cdd0 AG	208	static inline struct page *
	209	svc_take_res_page(struct svc_rqst *rqstp)
	210	{
	211	if (rqstp->rq_arghi <= rqstp->rq_argused)
	212	return NULL;
	213	rqstp->rq_arghi--;
	214	rqstp->rq_respages[rqstp->rq_resused] =
	215	rqstp->rq_argpages[rqstp->rq_arghi];
	216	return rqstp->rq_respages[rqstp->rq_resused++];
	217	}
	218
6f54e2d0	219	static inline void svc_take_page(struct svc_rqst *rqstp)
1da177e4	220	{
6f54e2d0 BF	221	if (rqstp->rq_arghi <= rqstp->rq_argused) {
	222	WARN_ON(1);
	223	return;
	224	}
1da177e4 LT	225	rqstp->rq_arghi--;
	226	rqstp->rq_respages[rqstp->rq_resused] =
	227	rqstp->rq_argpages[rqstp->rq_arghi];
	228	rqstp->rq_resused++;
1da177e4 LT	229	}
	230
	231	static inline void svc_pushback_allpages(struct svc_rqst *rqstp)
	232	{
	233	while (rqstp->rq_resused) {
	234	if (rqstp->rq_respages[--rqstp->rq_resused] == NULL)
	235	continue;
	236	rqstp->rq_argpages[rqstp->rq_arghi++] =
	237	rqstp->rq_respages[rqstp->rq_resused];
	238	rqstp->rq_respages[rqstp->rq_resused] = NULL;
	239	}
	240	}
	241
	242	static inline void svc_pushback_unused_pages(struct svc_rqst *rqstp)
	243	{
	244	while (rqstp->rq_resused &&
	245	rqstp->rq_res.pages != &rqstp->rq_respages[rqstp->rq_resused]) {
	246
	247	if (rqstp->rq_respages[--rqstp->rq_resused] != NULL) {
	248	rqstp->rq_argpages[rqstp->rq_arghi++] =
	249	rqstp->rq_respages[rqstp->rq_resused];
	250	rqstp->rq_respages[rqstp->rq_resused] = NULL;
	251	}
	252	}
	253	}
	254
	255	static inline void svc_free_allpages(struct svc_rqst *rqstp)
	256	{
	257	while (rqstp->rq_resused) {
	258	if (rqstp->rq_respages[--rqstp->rq_resused] == NULL)
	259	continue;
	260	put_page(rqstp->rq_respages[rqstp->rq_resused]);
	261	rqstp->rq_respages[rqstp->rq_resused] = NULL;
	262	}
	263	}
	264
	265	struct svc_deferred_req {
	266	u32 prot; /* protocol (UDP or TCP) */
	267	struct sockaddr_in addr;
	268	struct svc_sock svsk; / where reply must go */
1918e341	269	u32 daddr; /* where reply must come from */
1da177e4 LT	270	struct cache_deferred_req handle;
	271	int argslen;
	272	u32 args[0];
	273	};
	274
	275	/*
9ba02638	276	* List of RPC programs on the same transport endpoint
1da177e4 LT	277	*/
1da177e4 LT	278	struct svc_program {
9ba02638	279	struct svc_program * pg_next; /* other programs (same xprt) */
1da177e4 LT	280	u32 pg_prog; /* program number */
	281	unsigned int pg_lovers; /* lowest version */
	282	unsigned int pg_hivers; /* lowest version */
	283	unsigned int pg_nvers; /* number of versions */
	284	struct svc_version ** pg_vers; /* version array */
	285	char * pg_name; /* service name */
	286	char * pg_class; /* class name: services sharing authentication */
	287	struct svc_stat * pg_stats; /* rpc statistics */
	288	int (pg_authenticate)(struct svc_rqst );
	289	};
	290
	291	/*
	292	* RPC program version
	293	*/
	294	struct svc_version {
	295	u32 vs_vers; /* version number */
	296	u32 vs_nproc; /* number of procedures */
	297	struct svc_procedure * vs_proc; /* per-procedure info */
	298	u32 vs_xdrsize; /* xdrsize needed for this version */
	299
	300	/* Override dispatch function (e.g. when caching replies).
	301	* A return value of 0 means drop the request.
	302	* vs_dispatch == NULL means use default dispatcher.
	303	*/
	304	int (vs_dispatch)(struct svc_rqst , u32 *);
	305	};
	306
	307	/*
	308	* RPC procedure info
	309	*/
	310	typedef int (svc_procfunc)(struct svc_rqst , void argp, void resp);
	311	struct svc_procedure {
	312	svc_procfunc pc_func; /* process the request */
	313	kxdrproc_t pc_decode; /* XDR decode args */
	314	kxdrproc_t pc_encode; /* XDR encode result */
	315	kxdrproc_t pc_release; /* XDR free result */
	316	unsigned int pc_argsize; /* argument struct size */
	317	unsigned int pc_ressize; /* result struct size */
	318	unsigned int pc_count; /* call count */
	319	unsigned int pc_cachetype; /* cache info (NFS) */
	320	unsigned int pc_xdrressize; /* maximum size of XDR reply */
	321	};
	322
	323	/*
	324	* This is the RPC server thread function prototype
	325	*/
	326	typedef void (svc_thread_fn)(struct svc_rqst );
	327
	328	/*
	329	* Function prototypes.
	330	*/
	331	struct svc_serv * svc_create(struct svc_program *, unsigned int);
	332	int svc_create_thread(svc_thread_fn, struct svc_serv *);
	333	void svc_exit_thread(struct svc_rqst *);
	334	void svc_destroy(struct svc_serv *);
	335	int svc_process(struct svc_serv , struct svc_rqst );
	336	int svc_register(struct svc_serv *, int, unsigned short);
	337	void svc_wake_up(struct svc_serv *);
	338	void svc_reserve(struct svc_rqst *rqstp, int space);
	339
	340	#endif /* SUNRPC_SVC_H */