net/sunrpc/pmap_clnt.c - maze/linux - Git at Google

 /*
  * linux/net/sunrpc/pmap_clnt.c
  *
  * In-kernel RPC portmapper client.
  *
  * Portmapper supports version 2 of the rpcbind protocol (RFC 1833).
  *
  * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
  */

 #include <linux/types.h>
 #include <linux/socket.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/uio.h>
 #include <linux/in.h>
 #include <linux/sunrpc/clnt.h>
 #include <linux/sunrpc/xprt.h>
 #include <linux/sunrpc/sched.h>

 #ifdef RPC_DEBUG
 # define RPCDBG_FACILITY	RPCDBG_PMAP
 #endif

 #define PMAP_SET		1
 #define PMAP_UNSET		2
 #define PMAP_GETPORT		3

 struct portmap_args {
 	u32			pm_prog;
 	u32			pm_vers;
 	u32			pm_prot;
 	unsigned short		pm_port;
 	struct rpc_task *	pm_task;
 };

 static struct rpc_procinfo	pmap_procedures[];
 static struct rpc_clnt *	pmap_create(char *, struct sockaddr_in *, int, int);
 static void			pmap_getport_done(struct rpc_task *, void *);
 static struct rpc_program	pmap_program;

 static void pmap_getport_prepare(struct rpc_task *task, void *calldata)
 {
 	struct portmap_args *map = calldata;
 	struct rpc_message msg = {
 		.rpc_proc	= &pmap_procedures[PMAP_GETPORT],
 		.rpc_argp	= map,
 		.rpc_resp	= &map->pm_port,
 	};

 	rpc_call_setup(task, &msg, 0);
 }

 static inline struct portmap_args *pmap_map_alloc(void)
 {
 	return kmalloc(sizeof(struct portmap_args), GFP_NOFS);
 }

 static inline void pmap_map_free(struct portmap_args *map)
 {
 	kfree(map);
 }

 static void pmap_map_release(void *data)
 {
 	pmap_map_free(data);
 }

 static const struct rpc_call_ops pmap_getport_ops = {
 	.rpc_call_prepare	= pmap_getport_prepare,
 	.rpc_call_done		= pmap_getport_done,
 	.rpc_release		= pmap_map_release,
 };

 static inline void pmap_wake_portmap_waiters(struct rpc_xprt *xprt)
 {
 	xprt_clear_binding(xprt);
 	rpc_wake_up(&xprt->binding);
 }

 /**
  * rpc_getport - obtain the port for a given RPC service on a given host
  * @task: task that is waiting for portmapper request
  * @clnt: controlling rpc_clnt
  *
  * This one can be called for an ongoing RPC request, and can be used in
  * an async (rpciod) context.
  */
 void rpc_getport(struct rpc_task *task, struct rpc_clnt *clnt)
 {
 	struct rpc_xprt *xprt = task->tk_xprt;
 	struct sockaddr_in *sap = &xprt->addr;
 	struct portmap_args *map;
 	struct rpc_clnt	*pmap_clnt;
 	struct rpc_task *child;

 	dprintk("RPC: %4d rpc_getport(%s, %u, %u, %d)\n",
 			task->tk_pid, clnt->cl_server,
 			clnt->cl_prog, clnt->cl_vers, xprt->prot);

 	/* Autobind on cloned rpc clients is discouraged */
 	BUG_ON(clnt->cl_parent != clnt);

 	if (xprt_test_and_set_binding(xprt)) {
 		task->tk_status = -EACCES;	/* tell caller to check again */
 		rpc_sleep_on(&xprt->binding, task, NULL, NULL);
 		return;
 	}

 	/* Someone else may have bound if we slept */
 	if (xprt_bound(xprt)) {
 		task->tk_status = 0;
 		goto bailout_nofree;
 	}

 	map = pmap_map_alloc();
 	if (!map) {
 		task->tk_status = -ENOMEM;
 		goto bailout_nofree;
 	}
 	map->pm_prog = clnt->cl_prog;
 	map->pm_vers = clnt->cl_vers;
 	map->pm_prot = xprt->prot;
 	map->pm_port = 0;
 	map->pm_task = task;

 	pmap_clnt = pmap_create(clnt->cl_server, sap, map->pm_prot, 0);
 	if (IS_ERR(pmap_clnt)) {
 		task->tk_status = PTR_ERR(pmap_clnt);
 		goto bailout;
 	}

 	child = rpc_run_task(pmap_clnt, RPC_TASK_ASYNC, &pmap_getport_ops, map);
 	if (IS_ERR(child)) {
 		task->tk_status = -EIO;
 		goto bailout;
 	}
 	rpc_release_task(child);

 	rpc_sleep_on(&xprt->binding, task, NULL, NULL);

 	task->tk_xprt->stat.bind_count++;
 	return;

 bailout:
 	pmap_map_free(map);
 bailout_nofree:
 	pmap_wake_portmap_waiters(xprt);
 }

 #ifdef CONFIG_ROOT_NFS
 /**
  * rpc_getport_external - obtain the port for a given RPC service on a given host
  * @sin: address of remote peer
  * @prog: RPC program number to bind
  * @vers: RPC version number to bind
  * @prot: transport protocol to use to make this request
  *
  * This one is called from outside the RPC client in a synchronous task context.
  */
 int rpc_getport_external(struct sockaddr_in *sin, __u32 prog, __u32 vers, int prot)
 {
 	struct portmap_args map = {
 		.pm_prog	= prog,
 		.pm_vers	= vers,
 		.pm_prot	= prot,
 		.pm_port	= 0
 	};
 	struct rpc_message msg = {
 		.rpc_proc	= &pmap_procedures[PMAP_GETPORT],
 		.rpc_argp	= &map,
 		.rpc_resp	= &map.pm_port,
 	};
 	struct rpc_clnt	*pmap_clnt;
 	char		hostname[32];
 	int		status;

 	dprintk("RPC:      rpc_getport_external(%u.%u.%u.%u, %u, %u, %d)\n",
 			NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);

 	sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(sin->sin_addr.s_addr));
 	pmap_clnt = pmap_create(hostname, sin, prot, 0);
 	if (IS_ERR(pmap_clnt))
 		return PTR_ERR(pmap_clnt);

 	/* Setup the call info struct */
 	status = rpc_call_sync(pmap_clnt, &msg, 0);

 	if (status >= 0) {
 		if (map.pm_port != 0)
 			return map.pm_port;
 		status = -EACCES;
 	}
 	return status;
 }
 #endif

 /*
  * Portmapper child task invokes this callback via tk_exit.
  */
 static void pmap_getport_done(struct rpc_task *child, void *data)
 {
 	struct portmap_args *map = data;
 	struct rpc_task *task = map->pm_task;
 	struct rpc_xprt *xprt = task->tk_xprt;
 	int status = child->tk_status;

 	if (status < 0) {
 		/* Portmapper not available */
 		xprt->ops->set_port(xprt, 0);
 		task->tk_status = status;
 	} else if (map->pm_port == 0) {
 		/* Requested RPC service wasn't registered */
 		xprt->ops->set_port(xprt, 0);
 		task->tk_status = -EACCES;
 	} else {
 		/* Succeeded */
 		xprt->ops->set_port(xprt, map->pm_port);
 		xprt_set_bound(xprt);
 		task->tk_status = 0;
 	}

 	dprintk("RPC: %4d pmap_getport_done(status %d, port %u)\n",
 			child->tk_pid, child->tk_status, map->pm_port);

 	pmap_wake_portmap_waiters(xprt);
 }

 /**
  * rpc_register - set or unset a port registration with the local portmapper
  * @prog: RPC program number to bind
  * @vers: RPC version number to bind
  * @prot: transport protocol to use to make this request
  * @port: port value to register
  * @okay: result code
  *
  * port == 0 means unregister, port != 0 means register.
  */
 int rpc_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
 {
 	struct sockaddr_in	sin = {
 		.sin_family	= AF_INET,
 		.sin_addr.s_addr = htonl(INADDR_LOOPBACK),
 	};
 	struct portmap_args	map = {
 		.pm_prog	= prog,
 		.pm_vers	= vers,
 		.pm_prot	= prot,
 		.pm_port	= port,
 	};
 	struct rpc_message msg = {
 		.rpc_proc	= &pmap_procedures[port ? PMAP_SET : PMAP_UNSET],
 		.rpc_argp	= &map,
 		.rpc_resp	= okay,
 	};
 	struct rpc_clnt		*pmap_clnt;
 	int error = 0;

 	dprintk("RPC: registering (%u, %u, %d, %u) with portmapper.\n",
 			prog, vers, prot, port);

 	pmap_clnt = pmap_create("localhost", &sin, IPPROTO_UDP, 1);
 	if (IS_ERR(pmap_clnt)) {
 		error = PTR_ERR(pmap_clnt);
 		dprintk("RPC: couldn't create pmap client. Error = %d\n", error);
 		return error;
 	}

 	error = rpc_call_sync(pmap_clnt, &msg, 0);

 	if (error < 0) {
 		printk(KERN_WARNING
 			"RPC: failed to contact portmap (errno %d).\n",
 			error);
 	}
 	dprintk("RPC: registration status %d/%d\n", error, *okay);

 	/* Client deleted automatically because cl_oneshot == 1 */
 	return error;
 }

 static struct rpc_clnt *pmap_create(char *hostname, struct sockaddr_in *srvaddr, int proto, int privileged)
 {
 	struct rpc_xprt	*xprt;
 	struct rpc_clnt	*clnt;

 	xprt = xprt_create_proto(proto, srvaddr, NULL);
 	if (IS_ERR(xprt))
 		return (struct rpc_clnt *)xprt;
 	xprt->ops->set_port(xprt, RPC_PMAP_PORT);
 	xprt_set_bound(xprt);
 	if (!privileged)
 		xprt->resvport = 0;

 	clnt = rpc_new_client(xprt, hostname,
 				&pmap_program, RPC_PMAP_VERSION,
 				RPC_AUTH_UNIX);
 	if (!IS_ERR(clnt)) {
 		clnt->cl_softrtry = 1;
 		clnt->cl_oneshot  = 1;
 	}
 	return clnt;
 }

 /*
  * XDR encode/decode functions for PMAP
  */
 static int xdr_encode_mapping(struct rpc_rqst *req, u32 *p, struct portmap_args *map)
 {
 	dprintk("RPC: xdr_encode_mapping(%u, %u, %u, %u)\n",
 		map->pm_prog, map->pm_vers, map->pm_prot, map->pm_port);
 	*p++ = htonl(map->pm_prog);
 	*p++ = htonl(map->pm_vers);
 	*p++ = htonl(map->pm_prot);
 	*p++ = htonl(map->pm_port);

 	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
 	return 0;
 }

 static int xdr_decode_port(struct rpc_rqst *req, u32 *p, unsigned short *portp)
 {
 	*portp = (unsigned short) ntohl(*p++);
 	return 0;
 }

 static int xdr_decode_bool(struct rpc_rqst *req, u32 *p, unsigned int *boolp)
 {
 	*boolp = (unsigned int) ntohl(*p++);
 	return 0;
 }

 static struct rpc_procinfo	pmap_procedures[] = {
 [PMAP_SET] = {
 	  .p_proc		= PMAP_SET,
 	  .p_encode		= (kxdrproc_t) xdr_encode_mapping,
 	  .p_decode		= (kxdrproc_t) xdr_decode_bool,
 	  .p_bufsiz		= 4,
 	  .p_count		= 1,
 	  .p_statidx		= PMAP_SET,
 	  .p_name		= "SET",
 	},
 [PMAP_UNSET] = {
 	  .p_proc		= PMAP_UNSET,
 	  .p_encode		= (kxdrproc_t) xdr_encode_mapping,
 	  .p_decode		= (kxdrproc_t) xdr_decode_bool,
 	  .p_bufsiz		= 4,
 	  .p_count		= 1,
 	  .p_statidx		= PMAP_UNSET,
 	  .p_name		= "UNSET",
 	},
 [PMAP_GETPORT] = {
 	  .p_proc		= PMAP_GETPORT,
 	  .p_encode		= (kxdrproc_t) xdr_encode_mapping,
 	  .p_decode		= (kxdrproc_t) xdr_decode_port,
 	  .p_bufsiz		= 4,
 	  .p_count		= 1,
 	  .p_statidx		= PMAP_GETPORT,
 	  .p_name		= "GETPORT",
 	},
 };

 static struct rpc_version	pmap_version2 = {
 	.number		= 2,
 	.nrprocs	= 4,
 	.procs		= pmap_procedures
 };

 static struct rpc_version *	pmap_version[] = {
 	NULL,
 	NULL,
 	&pmap_version2
 };

 static struct rpc_stat		pmap_stats;

 static struct rpc_program	pmap_program = {
 	.name		= "portmap",
 	.number		= RPC_PMAP_PROGRAM,
 	.nrvers		= ARRAY_SIZE(pmap_version),
 	.version	= pmap_version,
 	.stats		= &pmap_stats,
 };
	/*
	* linux/net/sunrpc/pmap_clnt.c
	*
	* In-kernel RPC portmapper client.
	*
	* Portmapper supports version 2 of the rpcbind protocol (RFC 1833).
	*
	* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
	*/

	#include <linux/types.h>
	#include <linux/socket.h>
	#include <linux/kernel.h>
	#include <linux/errno.h>
	#include <linux/uio.h>
	#include <linux/in.h>
	#include <linux/sunrpc/clnt.h>
	#include <linux/sunrpc/xprt.h>
	#include <linux/sunrpc/sched.h>

	#ifdef RPC_DEBUG
	# define RPCDBG_FACILITY RPCDBG_PMAP
	#endif

	#define PMAP_SET 1
	#define PMAP_UNSET 2
	#define PMAP_GETPORT 3

	struct portmap_args {
	u32 pm_prog;
	u32 pm_vers;
	u32 pm_prot;
	unsigned short pm_port;
	struct rpc_task * pm_task;
	};

	static struct rpc_procinfo pmap_procedures[];
	static struct rpc_clnt * pmap_create(char , struct sockaddr_in , int, int);
	static void pmap_getport_done(struct rpc_task , void );
	static struct rpc_program pmap_program;

	static void pmap_getport_prepare(struct rpc_task task, void calldata)
	{
	struct portmap_args *map = calldata;
	struct rpc_message msg = {
	.rpc_proc = &pmap_procedures[PMAP_GETPORT],
	.rpc_argp = map,
	.rpc_resp = &map->pm_port,
	};

	rpc_call_setup(task, &msg, 0);
	}

	static inline struct portmap_args *pmap_map_alloc(void)
	{
	return kmalloc(sizeof(struct portmap_args), GFP_NOFS);
	}

	static inline void pmap_map_free(struct portmap_args *map)
	{
	kfree(map);
	}

	static void pmap_map_release(void *data)
	{
	pmap_map_free(data);
	}

	static const struct rpc_call_ops pmap_getport_ops = {
	.rpc_call_prepare = pmap_getport_prepare,
	.rpc_call_done = pmap_getport_done,
	.rpc_release = pmap_map_release,
	};

	static inline void pmap_wake_portmap_waiters(struct rpc_xprt *xprt)
	{
	xprt_clear_binding(xprt);
	rpc_wake_up(&xprt->binding);
	}

	/**
	* rpc_getport - obtain the port for a given RPC service on a given host
	* @task: task that is waiting for portmapper request
	* @clnt: controlling rpc_clnt
	*
	* This one can be called for an ongoing RPC request, and can be used in
	* an async (rpciod) context.
	*/
	void rpc_getport(struct rpc_task task, struct rpc_clnt clnt)
	{
	struct rpc_xprt *xprt = task->tk_xprt;
	struct sockaddr_in *sap = &xprt->addr;
	struct portmap_args *map;
	struct rpc_clnt *pmap_clnt;
	struct rpc_task *child;

	dprintk("RPC: %4d rpc_getport(%s, %u, %u, %d)\n",
	task->tk_pid, clnt->cl_server,
	clnt->cl_prog, clnt->cl_vers, xprt->prot);

	/* Autobind on cloned rpc clients is discouraged */
	BUG_ON(clnt->cl_parent != clnt);

	if (xprt_test_and_set_binding(xprt)) {
	task->tk_status = -EACCES; /* tell caller to check again */
	rpc_sleep_on(&xprt->binding, task, NULL, NULL);
	return;
	}

	/* Someone else may have bound if we slept */
	if (xprt_bound(xprt)) {
	task->tk_status = 0;
	goto bailout_nofree;
	}

	map = pmap_map_alloc();
	if (!map) {
	task->tk_status = -ENOMEM;
	goto bailout_nofree;
	}
	map->pm_prog = clnt->cl_prog;
	map->pm_vers = clnt->cl_vers;
	map->pm_prot = xprt->prot;
	map->pm_port = 0;
	map->pm_task = task;

	pmap_clnt = pmap_create(clnt->cl_server, sap, map->pm_prot, 0);
	if (IS_ERR(pmap_clnt)) {
	task->tk_status = PTR_ERR(pmap_clnt);
	goto bailout;
	}

	child = rpc_run_task(pmap_clnt, RPC_TASK_ASYNC, &pmap_getport_ops, map);
	if (IS_ERR(child)) {
	task->tk_status = -EIO;
	goto bailout;
	}
	rpc_release_task(child);

	rpc_sleep_on(&xprt->binding, task, NULL, NULL);

	task->tk_xprt->stat.bind_count++;
	return;

	bailout:
	pmap_map_free(map);
	bailout_nofree:
	pmap_wake_portmap_waiters(xprt);
	}

	#ifdef CONFIG_ROOT_NFS
	/**
	* rpc_getport_external - obtain the port for a given RPC service on a given host
	* @sin: address of remote peer
	* @prog: RPC program number to bind
	* @vers: RPC version number to bind
	* @prot: transport protocol to use to make this request
	*
	* This one is called from outside the RPC client in a synchronous task context.
	*/
	int rpc_getport_external(struct sockaddr_in *sin, __u32 prog, __u32 vers, int prot)
	{
	struct portmap_args map = {
	.pm_prog = prog,
	.pm_vers = vers,
	.pm_prot = prot,
	.pm_port = 0
	};
	struct rpc_message msg = {
	.rpc_proc = &pmap_procedures[PMAP_GETPORT],
	.rpc_argp = &map,
	.rpc_resp = &map.pm_port,
	};
	struct rpc_clnt *pmap_clnt;
	char hostname[32];
	int status;

	dprintk("RPC: rpc_getport_external(%u.%u.%u.%u, %u, %u, %d)\n",
	NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);

	sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(sin->sin_addr.s_addr));
	pmap_clnt = pmap_create(hostname, sin, prot, 0);
	if (IS_ERR(pmap_clnt))
	return PTR_ERR(pmap_clnt);

	/* Setup the call info struct */
	status = rpc_call_sync(pmap_clnt, &msg, 0);

	if (status >= 0) {
	if (map.pm_port != 0)
	return map.pm_port;
	status = -EACCES;
	}
	return status;
	}
	#endif

	/*
	* Portmapper child task invokes this callback via tk_exit.
	*/
	static void pmap_getport_done(struct rpc_task child, void data)
	{
	struct portmap_args *map = data;
	struct rpc_task *task = map->pm_task;
	struct rpc_xprt *xprt = task->tk_xprt;
	int status = child->tk_status;

	if (status < 0) {
	/* Portmapper not available */
	xprt->ops->set_port(xprt, 0);
	task->tk_status = status;
	} else if (map->pm_port == 0) {
	/* Requested RPC service wasn't registered */
	xprt->ops->set_port(xprt, 0);
	task->tk_status = -EACCES;
	} else {
	/* Succeeded */
	xprt->ops->set_port(xprt, map->pm_port);
	xprt_set_bound(xprt);
	task->tk_status = 0;
	}

	dprintk("RPC: %4d pmap_getport_done(status %d, port %u)\n",
	child->tk_pid, child->tk_status, map->pm_port);

	pmap_wake_portmap_waiters(xprt);
	}

	/**
	* rpc_register - set or unset a port registration with the local portmapper
	* @prog: RPC program number to bind
	* @vers: RPC version number to bind
	* @prot: transport protocol to use to make this request
	* @port: port value to register
	* @okay: result code
	*
	* port == 0 means unregister, port != 0 means register.
	*/
	int rpc_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
	{
	struct sockaddr_in sin = {
	.sin_family = AF_INET,
	.sin_addr.s_addr = htonl(INADDR_LOOPBACK),
	};
	struct portmap_args map = {
	.pm_prog = prog,
	.pm_vers = vers,
	.pm_prot = prot,
	.pm_port = port,
	};
	struct rpc_message msg = {
	.rpc_proc = &pmap_procedures[port ? PMAP_SET : PMAP_UNSET],
	.rpc_argp = &map,
	.rpc_resp = okay,
	};
	struct rpc_clnt *pmap_clnt;
	int error = 0;

	dprintk("RPC: registering (%u, %u, %d, %u) with portmapper.\n",
	prog, vers, prot, port);

	pmap_clnt = pmap_create("localhost", &sin, IPPROTO_UDP, 1);
	if (IS_ERR(pmap_clnt)) {
	error = PTR_ERR(pmap_clnt);
	dprintk("RPC: couldn't create pmap client. Error = %d\n", error);
	return error;
	}

	error = rpc_call_sync(pmap_clnt, &msg, 0);

	if (error < 0) {
	printk(KERN_WARNING
	"RPC: failed to contact portmap (errno %d).\n",
	error);
	}
	dprintk("RPC: registration status %d/%d\n", error, *okay);

	/* Client deleted automatically because cl_oneshot == 1 */
	return error;
	}

	static struct rpc_clnt pmap_create(char hostname, struct sockaddr_in *srvaddr, int proto, int privileged)
	{
	struct rpc_xprt *xprt;
	struct rpc_clnt *clnt;

	xprt = xprt_create_proto(proto, srvaddr, NULL);
	if (IS_ERR(xprt))
	return (struct rpc_clnt *)xprt;
	xprt->ops->set_port(xprt, RPC_PMAP_PORT);
	xprt_set_bound(xprt);
	if (!privileged)
	xprt->resvport = 0;

	clnt = rpc_new_client(xprt, hostname,
	&pmap_program, RPC_PMAP_VERSION,
	RPC_AUTH_UNIX);
	if (!IS_ERR(clnt)) {
	clnt->cl_softrtry = 1;
	clnt->cl_oneshot = 1;
	}
	return clnt;
	}

	/*
	* XDR encode/decode functions for PMAP
	*/
	static int xdr_encode_mapping(struct rpc_rqst req, u32 p, struct portmap_args *map)
	{
	dprintk("RPC: xdr_encode_mapping(%u, %u, %u, %u)\n",
	map->pm_prog, map->pm_vers, map->pm_prot, map->pm_port);
	*p++ = htonl(map->pm_prog);
	*p++ = htonl(map->pm_vers);
	*p++ = htonl(map->pm_prot);
	*p++ = htonl(map->pm_port);

	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
	return 0;
	}

	static int xdr_decode_port(struct rpc_rqst req, u32 p, unsigned short *portp)
	{
	portp = (unsigned short) ntohl(p++);
	return 0;
	}

	static int xdr_decode_bool(struct rpc_rqst req, u32 p, unsigned int *boolp)
	{
	boolp = (unsigned int) ntohl(p++);
	return 0;
	}

	static struct rpc_procinfo pmap_procedures[] = {
	[PMAP_SET] = {
	.p_proc = PMAP_SET,
	.p_encode = (kxdrproc_t) xdr_encode_mapping,
	.p_decode = (kxdrproc_t) xdr_decode_bool,
	.p_bufsiz = 4,
	.p_count = 1,
	.p_statidx = PMAP_SET,
	.p_name = "SET",
	},
	[PMAP_UNSET] = {
	.p_proc = PMAP_UNSET,
	.p_encode = (kxdrproc_t) xdr_encode_mapping,
	.p_decode = (kxdrproc_t) xdr_decode_bool,
	.p_bufsiz = 4,
	.p_count = 1,
	.p_statidx = PMAP_UNSET,
	.p_name = "UNSET",
	},
	[PMAP_GETPORT] = {
	.p_proc = PMAP_GETPORT,
	.p_encode = (kxdrproc_t) xdr_encode_mapping,
	.p_decode = (kxdrproc_t) xdr_decode_port,
	.p_bufsiz = 4,
	.p_count = 1,
	.p_statidx = PMAP_GETPORT,
	.p_name = "GETPORT",
	},
	};

	static struct rpc_version pmap_version2 = {
	.number = 2,
	.nrprocs = 4,
	.procs = pmap_procedures
	};

	static struct rpc_version * pmap_version[] = {
	NULL,
	NULL,
	&pmap_version2
	};

	static struct rpc_stat pmap_stats;

	static struct rpc_program pmap_program = {
	.name = "portmap",
	.number = RPC_PMAP_PROGRAM,
	.nrvers = ARRAY_SIZE(pmap_version),
	.version = pmap_version,
	.stats = &pmap_stats,
	};