[linux-2.6-block.git] / net / sunrpc / pmap_clnt.c

/*
 * 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/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_xprt *	pm_xprt;
};

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)
{
	struct portmap_args *map = data;

	xprt_put(map->pm_xprt);
	pmap_map_free(map);
}

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, int status)
{
	xprt_clear_binding(xprt);
	rpc_wake_up_status(&xprt->binding, status);
}

/**
 * rpc_getport - obtain the port for a given RPC service on a given host
 * @task: task that is waiting for portmapper request
 *
 * 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 = task->tk_client;
	struct rpc_xprt *xprt = task->tk_xprt;
	struct sockaddr_in addr;
	struct portmap_args *map;
	struct rpc_clnt	*pmap_clnt;
	struct rpc_task *child;
	int status;

	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);

	status = -EACCES;		/* tell caller to check again */
	if (xprt_test_and_set_binding(xprt))
		goto bailout_nowake;

	/* Put self on queue before sending rpcbind request, in case
	 * pmap_getport_done completes before we return from rpc_run_task */
	rpc_sleep_on(&xprt->binding, task, NULL, NULL);

	/* Someone else may have bound if we slept */
	status = 0;
	if (xprt_bound(xprt))
		goto bailout_nofree;

	status = -ENOMEM;
	map = pmap_map_alloc();
	if (!map)
		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_xprt = xprt_get(xprt);

	rpc_peeraddr(clnt, (struct sockaddr *) &addr, sizeof(addr));
	pmap_clnt = pmap_create(clnt->cl_server, &addr, map->pm_prot, 0);
	status = PTR_ERR(pmap_clnt);
	if (IS_ERR(pmap_clnt))
		goto bailout;

	status = -EIO;
	child = rpc_run_task(pmap_clnt, RPC_TASK_ASYNC, &pmap_getport_ops, map);
	if (IS_ERR(child))
		goto bailout_nofree;
	rpc_put_task(child);

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

bailout:
	pmap_map_free(map);
	xprt_put(xprt);
bailout_nofree:
	pmap_wake_portmap_waiters(xprt, status);
bailout_nowake:
	task->tk_status = status;
}

#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_xprt *xprt = map->pm_xprt;
	int status = child->tk_status;

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

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

	pmap_wake_portmap_waiters(xprt, status);
}

/**
 * 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_create_args args = {
		.protocol	= proto,
		.address	= (struct sockaddr *)srvaddr,
		.addrsize	= sizeof(*srvaddr),
		.servername	= hostname,
		.program	= &pmap_program,
		.version	= RPC_PMAP_VERSION,
		.authflavor	= RPC_AUTH_UNIX,
		.flags		= (RPC_CLNT_CREATE_ONESHOT |
				   RPC_CLNT_CREATE_NOPING),
	};

	srvaddr->sin_port = htons(RPC_PMAP_PORT);
	if (!privileged)
		args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
	return rpc_create(&args);
}

/*
 * XDR encode/decode functions for PMAP
 */
static int xdr_encode_mapping(struct rpc_rqst *req, __be32 *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, __be32 *p, unsigned short *portp)
{
	*portp = (unsigned short) ntohl(*p++);
	return 0;
}

static int xdr_decode_bool(struct rpc_rqst *req, __be32 *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,
};
Commit	Line	Data
1da177e4	1	/*
c4a5692f	2	* linux/net/sunrpc/pmap_clnt.c
1da177e4	3	*
c4a5692f CL	4	* In-kernel RPC portmapper client.
	5	*
	6	* Portmapper supports version 2 of the rpcbind protocol (RFC 1833).
1da177e4 LT	7	*
	8	* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
	9	*/
	10
1da177e4 LT	11	#include <linux/types.h>
	12	#include <linux/socket.h>
	13	#include <linux/kernel.h>
	14	#include <linux/errno.h>
	15	#include <linux/uio.h>
	16	#include <linux/in.h>
	17	#include <linux/sunrpc/clnt.h>
1da177e4 LT	18	#include <linux/sunrpc/sched.h>
	19
	20	#ifdef RPC_DEBUG
	21	# define RPCDBG_FACILITY RPCDBG_PMAP
	22	#endif
	23
	24	#define PMAP_SET 1
	25	#define PMAP_UNSET 2
	26	#define PMAP_GETPORT 3
	27
4a68179d CL	28	struct portmap_args {
	29	u32 pm_prog;
	30	u32 pm_vers;
	31	u32 pm_prot;
	32	unsigned short pm_port;
762d4527	33	struct rpc_xprt * pm_xprt;
4a68179d CL	34	};
4a68179d CL	35
1da177e4	36	static struct rpc_procinfo pmap_procedures[];
6cd7525a	37	static struct rpc_clnt * pmap_create(char , struct sockaddr_in , int, int);
4a68179d	38	static void pmap_getport_done(struct rpc_task , void );
1da177e4	39	static struct rpc_program pmap_program;
4a68179d CL	40
	41	static void pmap_getport_prepare(struct rpc_task task, void calldata)
	42	{
	43	struct portmap_args *map = calldata;
	44	struct rpc_message msg = {
	45	.rpc_proc = &pmap_procedures[PMAP_GETPORT],
	46	.rpc_argp = map,
	47	.rpc_resp = &map->pm_port,
	48	};
	49
	50	rpc_call_setup(task, &msg, 0);
	51	}
	52
	53	static inline struct portmap_args *pmap_map_alloc(void)
	54	{
	55	return kmalloc(sizeof(struct portmap_args), GFP_NOFS);
	56	}
	57
	58	static inline void pmap_map_free(struct portmap_args *map)
	59	{
	60	kfree(map);
	61	}
	62
	63	static void pmap_map_release(void *data)
	64	{
54cc533a TM	65	struct portmap_args *map = data;
	66
	67	xprt_put(map->pm_xprt);
	68	pmap_map_free(map);
4a68179d CL	69	}
	70
	71	static const struct rpc_call_ops pmap_getport_ops = {
	72	.rpc_call_prepare = pmap_getport_prepare,
	73	.rpc_call_done = pmap_getport_done,
	74	.rpc_release = pmap_map_release,
	75	};
	76
762d4527	77	static inline void pmap_wake_portmap_waiters(struct rpc_xprt *xprt, int status)
4a68179d CL	78	{
4a68179d CL	79	xprt_clear_binding(xprt);
762d4527	80	rpc_wake_up_status(&xprt->binding, status);
4a68179d	81	}
1da177e4	82
c4a5692f CL	83	/**
	84	* rpc_getport - obtain the port for a given RPC service on a given host
	85	* @task: task that is waiting for portmapper request
c4a5692f CL	86	*
	87	* This one can be called for an ongoing RPC request, and can be used in
	88	* an async (rpciod) context.
1da177e4	89	*/
bbf7c1dd	90	void rpc_getport(struct rpc_task *task)
1da177e4	91	{
bbf7c1dd	92	struct rpc_clnt *clnt = task->tk_client;
4a68179d	93	struct rpc_xprt *xprt = task->tk_xprt;
081f79a9	94	struct sockaddr_in addr;
4a68179d	95	struct portmap_args *map;
1da177e4	96	struct rpc_clnt *pmap_clnt;
4a68179d	97	struct rpc_task *child;
762d4527	98	int status;
1da177e4	99
4a68179d	100	dprintk("RPC: %4d rpc_getport(%s, %u, %u, %d)\n",
1da177e4	101	task->tk_pid, clnt->cl_server,
4a68179d	102	clnt->cl_prog, clnt->cl_vers, xprt->prot);
1da177e4	103
007e251f AG	104	/* Autobind on cloned rpc clients is discouraged */
	105	BUG_ON(clnt->cl_parent != clnt);
	106
2b577f1f CL	107	status = -EACCES; /* tell caller to check again */
	108	if (xprt_test_and_set_binding(xprt))
	109	goto bailout_nowake;
	110
71bdcf80 CL	111	/* Put self on queue before sending rpcbind request, in case
	112	* pmap_getport_done completes before we return from rpc_run_task */
	113	rpc_sleep_on(&xprt->binding, task, NULL, NULL);
	114
4a68179d	115	/* Someone else may have bound if we slept */
762d4527 TM	116	status = 0;
762d4527 TM	117	if (xprt_bound(xprt))
4a68179d	118	goto bailout_nofree;
4a68179d	119
762d4527	120	status = -ENOMEM;
4a68179d	121	map = pmap_map_alloc();
762d4527	122	if (!map)
4a68179d	123	goto bailout_nofree;
4a68179d CL	124	map->pm_prog = clnt->cl_prog;
	125	map->pm_vers = clnt->cl_vers;
	126	map->pm_prot = xprt->prot;
	127	map->pm_port = 0;
762d4527	128	map->pm_xprt = xprt_get(xprt);
1da177e4	129
081f79a9 CL	130	rpc_peeraddr(clnt, (struct sockaddr *) &addr, sizeof(addr));
081f79a9 CL	131	pmap_clnt = pmap_create(clnt->cl_server, &addr, map->pm_prot, 0);
762d4527 TM	132	status = PTR_ERR(pmap_clnt);
762d4527 TM	133	if (IS_ERR(pmap_clnt))
1da177e4	134	goto bailout;
1da177e4	135
762d4527	136	status = -EIO;
4a68179d	137	child = rpc_run_task(pmap_clnt, RPC_TASK_ASYNC, &pmap_getport_ops, map);
762d4527	138	if (IS_ERR(child))
54cc533a	139	goto bailout_nofree;
e6b3c4db	140	rpc_put_task(child);
1da177e4	141
262ca07d	142	task->tk_xprt->stat.bind_count++;
1da177e4 LT	143	return;
	144
	145	bailout:
4a68179d	146	pmap_map_free(map);
762d4527	147	xprt_put(xprt);
4a68179d	148	bailout_nofree:
762d4527	149	pmap_wake_portmap_waiters(xprt, status);
2b577f1f CL	150	bailout_nowake:
2b577f1f CL	151	task->tk_status = status;
1da177e4 LT	152	}
	153
	154	#ifdef CONFIG_ROOT_NFS
c4a5692f CL	155	/**
	156	* rpc_getport_external - obtain the port for a given RPC service on a given host
	157	* @sin: address of remote peer
	158	* @prog: RPC program number to bind
	159	* @vers: RPC version number to bind
	160	* @prot: transport protocol to use to make this request
	161	*
	162	* This one is called from outside the RPC client in a synchronous task context.
	163	*/
	164	int rpc_getport_external(struct sockaddr_in *sin, __u32 prog, __u32 vers, int prot)
1da177e4	165	{
4a68179d	166	struct portmap_args map = {
1da177e4 LT	167	.pm_prog = prog,
	168	.pm_vers = vers,
	169	.pm_prot = prot,
	170	.pm_port = 0
	171	};
dead28da CL	172	struct rpc_message msg = {
	173	.rpc_proc = &pmap_procedures[PMAP_GETPORT],
	174	.rpc_argp = &map,
	175	.rpc_resp = &map.pm_port,
	176	};
1da177e4 LT	177	struct rpc_clnt *pmap_clnt;
	178	char hostname[32];
	179	int status;
	180
c4a5692f	181	dprintk("RPC: rpc_getport_external(%u.%u.%u.%u, %u, %u, %d)\n",
1da177e4 LT	182	NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
	183
	184	sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(sin->sin_addr.s_addr));
6cd7525a	185	pmap_clnt = pmap_create(hostname, sin, prot, 0);
1da177e4 LT	186	if (IS_ERR(pmap_clnt))
	187	return PTR_ERR(pmap_clnt);
	188
	189	/* Setup the call info struct */
dead28da	190	status = rpc_call_sync(pmap_clnt, &msg, 0);
1da177e4 LT	191
	192	if (status >= 0) {
	193	if (map.pm_port != 0)
	194	return map.pm_port;
	195	status = -EACCES;
	196	}
	197	return status;
	198	}
	199	#endif
	200
c4a5692f CL	201	/*
	202	* Portmapper child task invokes this callback via tk_exit.
	203	*/
	204	static void pmap_getport_done(struct rpc_task child, void data)
1da177e4	205	{
4a68179d	206	struct portmap_args *map = data;
762d4527	207	struct rpc_xprt *xprt = map->pm_xprt;
4a68179d	208	int status = child->tk_status;
92200412	209
4a68179d CL	210	if (status < 0) {
4a68179d CL	211	/* Portmapper not available */
ec739ef0	212	xprt->ops->set_port(xprt, 0);
4a68179d CL	213	} else if (map->pm_port == 0) {
4a68179d CL	214	/* Requested RPC service wasn't registered */
ec739ef0	215	xprt->ops->set_port(xprt, 0);
762d4527	216	status = -EACCES;
1da177e4	217	} else {
4a68179d CL	218	/* Succeeded */
4a68179d CL	219	xprt->ops->set_port(xprt, map->pm_port);
ec739ef0	220	xprt_set_bound(xprt);
762d4527	221	status = 0;
1da177e4	222	}
4a68179d CL	223
4a68179d CL	224	dprintk("RPC: %4d pmap_getport_done(status %d, port %u)\n",
762d4527	225	child->tk_pid, status, map->pm_port);
4a68179d	226
762d4527	227	pmap_wake_portmap_waiters(xprt, status);
1da177e4 LT	228	}
1da177e4 LT	229
c4a5692f CL	230	/**
	231	* rpc_register - set or unset a port registration with the local portmapper
	232	* @prog: RPC program number to bind
	233	* @vers: RPC version number to bind
	234	* @prot: transport protocol to use to make this request
	235	* @port: port value to register
	236	* @okay: result code
	237	*
1da177e4 LT	238	* port == 0 means unregister, port != 0 means register.
1da177e4 LT	239	*/
c4a5692f	240	int rpc_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
1da177e4	241	{
dead28da CL	242	struct sockaddr_in sin = {
	243	.sin_family = AF_INET,
	244	.sin_addr.s_addr = htonl(INADDR_LOOPBACK),
	245	};
4a68179d	246	struct portmap_args map = {
dead28da CL	247	.pm_prog = prog,
	248	.pm_vers = vers,
	249	.pm_prot = prot,
	250	.pm_port = port,
	251	};
	252	struct rpc_message msg = {
	253	.rpc_proc = &pmap_procedures[port ? PMAP_SET : PMAP_UNSET],
	254	.rpc_argp = &map,
	255	.rpc_resp = okay,
	256	};
1da177e4 LT	257	struct rpc_clnt *pmap_clnt;
	258	int error = 0;
	259
c4a5692f	260	dprintk("RPC: registering (%u, %u, %d, %u) with portmapper.\n",
1da177e4 LT	261	prog, vers, prot, port);
1da177e4 LT	262
6cd7525a	263	pmap_clnt = pmap_create("localhost", &sin, IPPROTO_UDP, 1);
1da177e4 LT	264	if (IS_ERR(pmap_clnt)) {
	265	error = PTR_ERR(pmap_clnt);
	266	dprintk("RPC: couldn't create pmap client. Error = %d\n", error);
	267	return error;
	268	}
	269
dead28da	270	error = rpc_call_sync(pmap_clnt, &msg, 0);
1da177e4 LT	271
	272	if (error < 0) {
	273	printk(KERN_WARNING
	274	"RPC: failed to contact portmap (errno %d).\n",
	275	error);
	276	}
	277	dprintk("RPC: registration status %d/%d\n", error, *okay);
	278
	279	/* Client deleted automatically because cl_oneshot == 1 */
	280	return error;
	281	}
	282
c4a5692f	283	static struct rpc_clnt pmap_create(char hostname, struct sockaddr_in *srvaddr, int proto, int privileged)
1da177e4	284	{
9e1968c5 CL	285	struct rpc_create_args args = {
	286	.protocol = proto,
	287	.address = (struct sockaddr *)srvaddr,
	288	.addrsize = sizeof(*srvaddr),
	289	.servername = hostname,
	290	.program = &pmap_program,
	291	.version = RPC_PMAP_VERSION,
	292	.authflavor = RPC_AUTH_UNIX,
	293	.flags = (RPC_CLNT_CREATE_ONESHOT \|
	294	RPC_CLNT_CREATE_NOPING),
	295	};
	296
	297	srvaddr->sin_port = htons(RPC_PMAP_PORT);
6cd7525a	298	if (!privileged)
9e1968c5 CL	299	args.flags \|= RPC_CLNT_CREATE_NONPRIVPORT;
9e1968c5 CL	300	return rpc_create(&args);
1da177e4 LT	301	}
	302
	303	/*
	304	* XDR encode/decode functions for PMAP
	305	*/
d8ed029d	306	static int xdr_encode_mapping(struct rpc_rqst req, __be32 p, struct portmap_args *map)
1da177e4	307	{
c4a5692f	308	dprintk("RPC: xdr_encode_mapping(%u, %u, %u, %u)\n",
1da177e4 LT	309	map->pm_prog, map->pm_vers, map->pm_prot, map->pm_port);
	310	*p++ = htonl(map->pm_prog);
	311	*p++ = htonl(map->pm_vers);
	312	*p++ = htonl(map->pm_prot);
	313	*p++ = htonl(map->pm_port);
	314
	315	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
	316	return 0;
	317	}
	318
d8ed029d	319	static int xdr_decode_port(struct rpc_rqst req, __be32 p, unsigned short *portp)
1da177e4 LT	320	{
	321	portp = (unsigned short) ntohl(p++);
	322	return 0;
	323	}
	324
d8ed029d	325	static int xdr_decode_bool(struct rpc_rqst req, __be32 p, unsigned int *boolp)
1da177e4 LT	326	{
	327	boolp = (unsigned int) ntohl(p++);
	328	return 0;
	329	}
	330
	331	static struct rpc_procinfo pmap_procedures[] = {
	332	[PMAP_SET] = {
	333	.p_proc = PMAP_SET,
	334	.p_encode = (kxdrproc_t) xdr_encode_mapping,
	335	.p_decode = (kxdrproc_t) xdr_decode_bool,
	336	.p_bufsiz = 4,
	337	.p_count = 1,
cc0175c1 CL	338	.p_statidx = PMAP_SET,
cc0175c1 CL	339	.p_name = "SET",
1da177e4 LT	340	},
	341	[PMAP_UNSET] = {
	342	.p_proc = PMAP_UNSET,
	343	.p_encode = (kxdrproc_t) xdr_encode_mapping,
	344	.p_decode = (kxdrproc_t) xdr_decode_bool,
	345	.p_bufsiz = 4,
	346	.p_count = 1,
cc0175c1 CL	347	.p_statidx = PMAP_UNSET,
cc0175c1 CL	348	.p_name = "UNSET",
1da177e4 LT	349	},
	350	[PMAP_GETPORT] = {
	351	.p_proc = PMAP_GETPORT,
	352	.p_encode = (kxdrproc_t) xdr_encode_mapping,
	353	.p_decode = (kxdrproc_t) xdr_decode_port,
	354	.p_bufsiz = 4,
	355	.p_count = 1,
cc0175c1 CL	356	.p_statidx = PMAP_GETPORT,
cc0175c1 CL	357	.p_name = "GETPORT",
1da177e4 LT	358	},
	359	};
	360
	361	static struct rpc_version pmap_version2 = {
	362	.number = 2,
	363	.nrprocs = 4,
	364	.procs = pmap_procedures
	365	};
	366
	367	static struct rpc_version * pmap_version[] = {
	368	NULL,
	369	NULL,
	370	&pmap_version2
	371	};
	372
	373	static struct rpc_stat pmap_stats;
	374
	375	static struct rpc_program pmap_program = {
	376	.name = "portmap",
	377	.number = RPC_PMAP_PROGRAM,
	378	.nrvers = ARRAY_SIZE(pmap_version),
	379	.version = pmap_version,
	380	.stats = &pmap_stats,
	381	};