[linux.git] / net / sunrpc / rpcb_clnt.c

/*
 * In-kernel rpcbind client supporting versions 2, 3, and 4 of the rpcbind
 * protocol
 *
 * Based on RFC 1833: "Binding Protocols for ONC RPC Version 2" and
 * RFC 3530: "Network File System (NFS) version 4 Protocol"
 *
 * Original: Gilles Quillard, Bull Open Source, 2005 <[email protected]>
 * Updated: Chuck Lever, Oracle Corporation, 2007 <[email protected]>
 *
 * Descended from net/sunrpc/pmap_clnt.c,
 *  Copyright (C) 1996, Olaf Kirch <[email protected]>
 */

#include <linux/module.h>

#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/in6.h>
#include <linux/kernel.h>
#include <linux/errno.h>

#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/sched.h>

#ifdef RPC_DEBUG
# define RPCDBG_FACILITY	RPCDBG_BIND
#endif

#define RPCBIND_PROGRAM		(100000u)
#define RPCBIND_PORT		(111u)

enum {
	RPCBPROC_NULL,
	RPCBPROC_SET,
	RPCBPROC_UNSET,
	RPCBPROC_GETPORT,
	RPCBPROC_GETADDR = 3,		/* alias for GETPORT */
	RPCBPROC_DUMP,
	RPCBPROC_CALLIT,
	RPCBPROC_BCAST = 5,		/* alias for CALLIT */
	RPCBPROC_GETTIME,
	RPCBPROC_UADDR2TADDR,
	RPCBPROC_TADDR2UADDR,
	RPCBPROC_GETVERSADDR,
	RPCBPROC_INDIRECT,
	RPCBPROC_GETADDRLIST,
	RPCBPROC_GETSTAT,
};

#define RPCB_HIGHPROC_2		RPCBPROC_CALLIT
#define RPCB_HIGHPROC_3		RPCBPROC_TADDR2UADDR
#define RPCB_HIGHPROC_4		RPCBPROC_GETSTAT

/*
 * r_addr
 *
 * Quoting RFC 3530, section 2.2:
 *
 * For TCP over IPv4 and for UDP over IPv4, the format of r_addr is the
 * US-ASCII string:
 *
 *	h1.h2.h3.h4.p1.p2
 *
 * The prefix, "h1.h2.h3.h4", is the standard textual form for
 * representing an IPv4 address, which is always four octets long.
 * Assuming big-endian ordering, h1, h2, h3, and h4, are respectively,
 * the first through fourth octets each converted to ASCII-decimal.
 * Assuming big-endian ordering, p1 and p2 are, respectively, the first
 * and second octets each converted to ASCII-decimal.  For example, if a
 * host, in big-endian order, has an address of 0x0A010307 and there is
 * a service listening on, in big endian order, port 0x020F (decimal
 * 527), then the complete universal address is "10.1.3.7.2.15".
 *
 * ...
 *
 * For TCP over IPv6 and for UDP over IPv6, the format of r_addr is the
 * US-ASCII string:
 *
 *	x1:x2:x3:x4:x5:x6:x7:x8.p1.p2
 *
 * The suffix "p1.p2" is the service port, and is computed the same way
 * as with universal addresses for TCP and UDP over IPv4.  The prefix,
 * "x1:x2:x3:x4:x5:x6:x7:x8", is the standard textual form for
 * representing an IPv6 address as defined in Section 2.2 of [RFC2373].
 * Additionally, the two alternative forms specified in Section 2.2 of
 * [RFC2373] are also acceptable.
 *
 * XXX: Currently this implementation does not explicitly convert the
 *      stored address to US-ASCII on non-ASCII systems.
 */
#define RPCB_MAXADDRLEN		(128u)

/*
 * r_owner
 *
 * The "owner" is allowed to unset a service in the rpcbind database.
 * We always use the following (arbitrary) fixed string.
 */
#define RPCB_OWNER_STRING	"rpcb"
#define RPCB_MAXOWNERLEN	sizeof(RPCB_OWNER_STRING)

static void			rpcb_getport_done(struct rpc_task *, void *);
extern struct rpc_program	rpcb_program;

struct rpcbind_args {
	struct rpc_xprt *	r_xprt;

	u32			r_prog;
	u32			r_vers;
	u32			r_prot;
	unsigned short		r_port;
	char *			r_netid;
	char			r_addr[RPCB_MAXADDRLEN];
	char *			r_owner;
};

static struct rpc_procinfo rpcb_procedures2[];
static struct rpc_procinfo rpcb_procedures3[];

struct rpcb_info {
	int			rpc_vers;
	struct rpc_procinfo *	rpc_proc;
};

static struct rpcb_info rpcb_next_version[];
static struct rpcb_info rpcb_next_version6[];

static void rpcb_getport_prepare(struct rpc_task *task, void *calldata)
{
	struct rpcbind_args *map = calldata;
	struct rpc_xprt *xprt = map->r_xprt;
	struct rpc_message msg = {
		.rpc_proc	= rpcb_next_version[xprt->bind_index].rpc_proc,
		.rpc_argp	= map,
		.rpc_resp	= &map->r_port,
	};

	rpc_call_setup(task, &msg, 0);
}

static void rpcb_map_release(void *data)
{
	struct rpcbind_args *map = data;

	xprt_put(map->r_xprt);
	kfree(map);
}

static const struct rpc_call_ops rpcb_getport_ops = {
	.rpc_call_prepare	= rpcb_getport_prepare,
	.rpc_call_done		= rpcb_getport_done,
	.rpc_release		= rpcb_map_release,
};

static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status)
{
	xprt_clear_binding(xprt);
	rpc_wake_up_status(&xprt->binding, status);
}

static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
					int proto, int version, int privileged)
{
	struct rpc_create_args args = {
		.protocol	= proto,
		.address	= srvaddr,
		.addrsize	= sizeof(struct sockaddr_in),
		.servername	= hostname,
		.program	= &rpcb_program,
		.version	= version,
		.authflavor	= RPC_AUTH_UNIX,
		.flags		= (RPC_CLNT_CREATE_NOPING |
				   RPC_CLNT_CREATE_INTR),
	};

	switch (srvaddr->sa_family) {
	case AF_INET:
		((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
		break;
	case AF_INET6:
		((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT);
		break;
	default:
		return NULL;
	}

	if (!privileged)
		args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
	return rpc_create(&args);
}

/**
 * rpcb_register - set or unset a port registration with the local rpcbind svc
 * @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.
 *
 * This routine supports only rpcbind version 2.
 */
int rpcb_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 rpcbind_args map = {
		.r_prog		= prog,
		.r_vers		= vers,
		.r_prot		= prot,
		.r_port		= port,
	};
	struct rpc_message msg = {
		.rpc_proc	= &rpcb_procedures2[port ?
					RPCBPROC_SET : RPCBPROC_UNSET],
		.rpc_argp	= &map,
		.rpc_resp	= okay,
	};
	struct rpc_clnt *rpcb_clnt;
	int error = 0;

	dprintk("RPC:       %sregistering (%u, %u, %d, %u) with local "
			"rpcbind\n", (port ? "" : "un"),
			prog, vers, prot, port);

	rpcb_clnt = rpcb_create("localhost", (struct sockaddr *) &sin,
					IPPROTO_UDP, 2, 1);
	if (IS_ERR(rpcb_clnt))
		return PTR_ERR(rpcb_clnt);

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

	rpc_shutdown_client(rpcb_clnt);
	if (error < 0)
		printk(KERN_WARNING "RPC: failed to contact local rpcbind "
				"server (errno %d).\n", -error);
	dprintk("RPC:       registration status %d/%d\n", error, *okay);

	return error;
}

/**
 * rpcb_getport_sync - obtain the port for an 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
 *
 * Called from outside the RPC client in a synchronous task context.
 * Uses default timeout parameters specified by underlying transport.
 *
 * XXX: Needs to support IPv6, and rpcbind versions 3 and 4
 */
int rpcb_getport_sync(struct sockaddr_in *sin, __u32 prog,
		      __u32 vers, int prot)
{
	struct rpcbind_args map = {
		.r_prog		= prog,
		.r_vers		= vers,
		.r_prot		= prot,
		.r_port		= 0,
	};
	struct rpc_message msg = {
		.rpc_proc	= &rpcb_procedures2[RPCBPROC_GETPORT],
		.rpc_argp	= &map,
		.rpc_resp	= &map.r_port,
	};
	struct rpc_clnt	*rpcb_clnt;
	char hostname[40];
	int status;

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

	sprintf(hostname, NIPQUAD_FMT, NIPQUAD(sin->sin_addr.s_addr));
	rpcb_clnt = rpcb_create(hostname, (struct sockaddr *)sin, prot, 2, 0);
	if (IS_ERR(rpcb_clnt))
		return PTR_ERR(rpcb_clnt);

	status = rpc_call_sync(rpcb_clnt, &msg, 0);
	rpc_shutdown_client(rpcb_clnt);

	if (status >= 0) {
		if (map.r_port != 0)
			return map.r_port;
		status = -EACCES;
	}
	return status;
}
EXPORT_SYMBOL_GPL(rpcb_getport_sync);

/**
 * rpcb_getport_async - 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 rpcb_getport_async(struct rpc_task *task)
{
	struct rpc_clnt *clnt = task->tk_client;
	int bind_version;
	struct rpc_xprt *xprt = task->tk_xprt;
	struct rpc_clnt	*rpcb_clnt;
	static struct rpcbind_args *map;
	struct rpc_task	*child;
	struct sockaddr addr;
	int status;
	struct rpcb_info *info;

	dprintk("RPC: %5u %s(%s, %u, %u, %d)\n",
		task->tk_pid, __FUNCTION__,
		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)) {
		status = -EAGAIN;	/* tell caller to check again */
		dprintk("RPC: %5u %s: waiting for another binder\n",
			task->tk_pid, __FUNCTION__);
		goto bailout_nowake;
	}

	/* Put self on queue before sending rpcbind request, in case
	 * rpcb_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 */
	if (xprt_bound(xprt)) {
		status = 0;
		dprintk("RPC: %5u %s: already bound\n",
			task->tk_pid, __FUNCTION__);
		goto bailout_nofree;
	}

	rpc_peeraddr(clnt, (void *)&addr, sizeof(addr));

	/* Don't ever use rpcbind v2 for AF_INET6 requests */
	switch (addr.sa_family) {
	case AF_INET:
		info = rpcb_next_version;
		break;
	case AF_INET6:
		info = rpcb_next_version6;
		break;
	default:
		status = -EAFNOSUPPORT;
		dprintk("RPC: %5u %s: bad address family\n",
				task->tk_pid, __FUNCTION__);
		goto bailout_nofree;
	}
	if (info[xprt->bind_index].rpc_proc == NULL) {
		xprt->bind_index = 0;
		status = -EPFNOSUPPORT;
		dprintk("RPC: %5u %s: no more getport versions available\n",
			task->tk_pid, __FUNCTION__);
		goto bailout_nofree;
	}
	bind_version = info[xprt->bind_index].rpc_vers;

	dprintk("RPC: %5u %s: trying rpcbind version %u\n",
		task->tk_pid, __FUNCTION__, bind_version);

	rpcb_clnt = rpcb_create(clnt->cl_server, &addr, xprt->prot,
				bind_version, 0);
	if (IS_ERR(rpcb_clnt)) {
		status = PTR_ERR(rpcb_clnt);
		dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n",
			task->tk_pid, __FUNCTION__, PTR_ERR(rpcb_clnt));
		goto bailout_nofree;
	}

	map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC);
	if (!map) {
		status = -ENOMEM;
		dprintk("RPC: %5u %s: no memory available\n",
			task->tk_pid, __FUNCTION__);
		goto bailout_nofree;
	}
	map->r_prog = clnt->cl_prog;
	map->r_vers = clnt->cl_vers;
	map->r_prot = xprt->prot;
	map->r_port = 0;
	map->r_xprt = xprt_get(xprt);
	map->r_netid = rpc_peeraddr2str(clnt, RPC_DISPLAY_NETID);
	memcpy(map->r_addr,
	       rpc_peeraddr2str(rpcb_clnt, RPC_DISPLAY_UNIVERSAL_ADDR),
	       sizeof(map->r_addr));
	map->r_owner = RPCB_OWNER_STRING;	/* ignored for GETADDR */

	child = rpc_run_task(rpcb_clnt, RPC_TASK_ASYNC, &rpcb_getport_ops, map);
	rpc_release_client(rpcb_clnt);
	if (IS_ERR(child)) {
		status = -EIO;
		dprintk("RPC: %5u %s: rpc_run_task failed\n",
			task->tk_pid, __FUNCTION__);
		goto bailout;
	}
	rpc_put_task(child);

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

bailout:
	kfree(map);
	xprt_put(xprt);
bailout_nofree:
	rpcb_wake_rpcbind_waiters(xprt, status);
bailout_nowake:
	task->tk_status = status;
}
EXPORT_SYMBOL_GPL(rpcb_getport_async);

/*
 * Rpcbind child task calls this callback via tk_exit.
 */
static void rpcb_getport_done(struct rpc_task *child, void *data)
{
	struct rpcbind_args *map = data;
	struct rpc_xprt *xprt = map->r_xprt;
	int status = child->tk_status;

	/* Garbage reply: retry with a lesser rpcbind version */
	if (status == -EIO)
		status = -EPROTONOSUPPORT;

	/* rpcbind server doesn't support this rpcbind protocol version */
	if (status == -EPROTONOSUPPORT)
		xprt->bind_index++;

	if (status < 0) {
		/* rpcbind server not available on remote host? */
		xprt->ops->set_port(xprt, 0);
	} else if (map->r_port == 0) {
		/* Requested RPC service wasn't registered on remote host */
		xprt->ops->set_port(xprt, 0);
		status = -EACCES;
	} else {
		/* Succeeded */
		xprt->ops->set_port(xprt, map->r_port);
		xprt_set_bound(xprt);
		status = 0;
	}

	dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
			child->tk_pid, status, map->r_port);

	rpcb_wake_rpcbind_waiters(xprt, status);
}

static int rpcb_encode_mapping(struct rpc_rqst *req, __be32 *p,
			       struct rpcbind_args *rpcb)
{
	dprintk("RPC:       rpcb_encode_mapping(%u, %u, %d, %u)\n",
			rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port);
	*p++ = htonl(rpcb->r_prog);
	*p++ = htonl(rpcb->r_vers);
	*p++ = htonl(rpcb->r_prot);
	*p++ = htonl(rpcb->r_port);

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

static int rpcb_decode_getport(struct rpc_rqst *req, __be32 *p,
			       unsigned short *portp)
{
	*portp = (unsigned short) ntohl(*p++);
	dprintk("RPC:      rpcb_decode_getport result %u\n",
			*portp);
	return 0;
}

static int rpcb_decode_set(struct rpc_rqst *req, __be32 *p,
			   unsigned int *boolp)
{
	*boolp = (unsigned int) ntohl(*p++);
	dprintk("RPC:      rpcb_decode_set result %u\n",
			*boolp);
	return 0;
}

static int rpcb_encode_getaddr(struct rpc_rqst *req, __be32 *p,
			       struct rpcbind_args *rpcb)
{
	dprintk("RPC:       rpcb_encode_getaddr(%u, %u, %s)\n",
			rpcb->r_prog, rpcb->r_vers, rpcb->r_addr);
	*p++ = htonl(rpcb->r_prog);
	*p++ = htonl(rpcb->r_vers);

	p = xdr_encode_string(p, rpcb->r_netid);
	p = xdr_encode_string(p, rpcb->r_addr);
	p = xdr_encode_string(p, rpcb->r_owner);

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

	return 0;
}

static int rpcb_decode_getaddr(struct rpc_rqst *req, __be32 *p,
			       unsigned short *portp)
{
	char *addr;
	u32 addr_len;
	int c, i, f, first, val;

	*portp = 0;
	addr_len = ntohl(*p++);

	/*
	 * Simple sanity check.  The smallest possible universal
	 * address is an IPv4 address string containing 11 bytes.
	 */
	if (addr_len < 11 || addr_len > RPCB_MAXADDRLEN)
		goto out_err;

	/*
	 * Start at the end and walk backwards until the first dot
	 * is encountered.  When the second dot is found, we have
	 * both parts of the port number.
	 */
	addr = (char *)p;
	val = 0;
	first = 1;
	f = 1;
	for (i = addr_len - 1; i > 0; i--) {
		c = addr[i];
		if (c >= '0' && c <= '9') {
			val += (c - '0') * f;
			f *= 10;
		} else if (c == '.') {
			if (first) {
				*portp = val;
				val = first = 0;
				f = 1;
			} else {
				*portp |= (val << 8);
				break;
			}
		}
	}

	/*
	 * Simple sanity check.  If we never saw a dot in the reply,
	 * then this was probably just garbage.
	 */
	if (first)
		goto out_err;

	dprintk("RPC:       rpcb_decode_getaddr port=%u\n", *portp);
	return 0;

out_err:
	dprintk("RPC:       rpcbind server returned malformed reply\n");
	return -EIO;
}

#define RPCB_program_sz		(1u)
#define RPCB_version_sz		(1u)
#define RPCB_protocol_sz	(1u)
#define RPCB_port_sz		(1u)
#define RPCB_boolean_sz		(1u)

#define RPCB_netid_sz		(1+XDR_QUADLEN(RPCBIND_MAXNETIDLEN))
#define RPCB_addr_sz		(1+XDR_QUADLEN(RPCB_MAXADDRLEN))
#define RPCB_ownerstring_sz	(1+XDR_QUADLEN(RPCB_MAXOWNERLEN))

#define RPCB_mappingargs_sz	RPCB_program_sz+RPCB_version_sz+	\
				RPCB_protocol_sz+RPCB_port_sz
#define RPCB_getaddrargs_sz	RPCB_program_sz+RPCB_version_sz+	\
				RPCB_netid_sz+RPCB_addr_sz+		\
				RPCB_ownerstring_sz

#define RPCB_setres_sz		RPCB_boolean_sz
#define RPCB_getportres_sz	RPCB_port_sz

/*
 * Note that RFC 1833 does not put any size restrictions on the
 * address string returned by the remote rpcbind database.
 */
#define RPCB_getaddrres_sz	RPCB_addr_sz

#define PROC(proc, argtype, restype)					\
	[RPCBPROC_##proc] = {						\
		.p_proc		= RPCBPROC_##proc,			\
		.p_encode	= (kxdrproc_t) rpcb_encode_##argtype,	\
		.p_decode	= (kxdrproc_t) rpcb_decode_##restype,	\
		.p_arglen	= RPCB_##argtype##args_sz,		\
		.p_replen	= RPCB_##restype##res_sz,		\
		.p_statidx	= RPCBPROC_##proc,			\
		.p_timer	= 0,					\
		.p_name		= #proc,				\
	}

/*
 * Not all rpcbind procedures described in RFC 1833 are implemented
 * since the Linux kernel RPC code requires only these.
 */
static struct rpc_procinfo rpcb_procedures2[] = {
	PROC(SET,		mapping,	set),
	PROC(UNSET,		mapping,	set),
	PROC(GETADDR,		mapping,	getport),
};

static struct rpc_procinfo rpcb_procedures3[] = {
	PROC(SET,		mapping,	set),
	PROC(UNSET,		mapping,	set),
	PROC(GETADDR,		getaddr,	getaddr),
};

static struct rpc_procinfo rpcb_procedures4[] = {
	PROC(SET,		mapping,	set),
	PROC(UNSET,		mapping,	set),
	PROC(GETVERSADDR,	getaddr,	getaddr),
};

static struct rpcb_info rpcb_next_version[] = {
#ifdef CONFIG_SUNRPC_BIND34
	{ 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
	{ 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
#endif
	{ 2, &rpcb_procedures2[RPCBPROC_GETPORT] },
	{ 0, NULL },
};

static struct rpcb_info rpcb_next_version6[] = {
#ifdef CONFIG_SUNRPC_BIND34
	{ 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
	{ 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
#endif
	{ 0, NULL },
};

static struct rpc_version rpcb_version2 = {
	.number		= 2,
	.nrprocs	= RPCB_HIGHPROC_2,
	.procs		= rpcb_procedures2
};

static struct rpc_version rpcb_version3 = {
	.number		= 3,
	.nrprocs	= RPCB_HIGHPROC_3,
	.procs		= rpcb_procedures3
};

static struct rpc_version rpcb_version4 = {
	.number		= 4,
	.nrprocs	= RPCB_HIGHPROC_4,
	.procs		= rpcb_procedures4
};

static struct rpc_version *rpcb_version[] = {
	NULL,
	NULL,
	&rpcb_version2,
	&rpcb_version3,
	&rpcb_version4
};

static struct rpc_stat rpcb_stats;

struct rpc_program rpcb_program = {
	.name		= "rpcbind",
	.number		= RPCBIND_PROGRAM,
	.nrvers		= ARRAY_SIZE(rpcb_version),
	.version	= rpcb_version,
	.stats		= &rpcb_stats,
};
Commit	Line	Data
a509050b CL	1	/*
	2	* In-kernel rpcbind client supporting versions 2, 3, and 4 of the rpcbind
	3	* protocol
	4	*
	5	* Based on RFC 1833: "Binding Protocols for ONC RPC Version 2" and
	6	* RFC 3530: "Network File System (NFS) version 4 Protocol"
	7	*
	8	* Original: Gilles Quillard, Bull Open Source, 2005 <[email protected]>
	9	* Updated: Chuck Lever, Oracle Corporation, 2007 <[email protected]>
	10	*
	11	* Descended from net/sunrpc/pmap_clnt.c,
	12	* Copyright (C) 1996, Olaf Kirch <[email protected]>
	13	*/
	14
cce63cd6 CL	15	#include <linux/module.h>
cce63cd6 CL	16
a509050b CL	17	#include <linux/types.h>
a509050b CL	18	#include <linux/socket.h>
d5b64430 CL	19	#include <linux/in.h>
d5b64430 CL	20	#include <linux/in6.h>
a509050b CL	21	#include <linux/kernel.h>
	22	#include <linux/errno.h>
	23
	24	#include <linux/sunrpc/clnt.h>
	25	#include <linux/sunrpc/sched.h>
	26
	27	#ifdef RPC_DEBUG
	28	# define RPCDBG_FACILITY RPCDBG_BIND
	29	#endif
	30
	31	#define RPCBIND_PROGRAM (100000u)
	32	#define RPCBIND_PORT (111u)
	33
	34	enum {
	35	RPCBPROC_NULL,
	36	RPCBPROC_SET,
	37	RPCBPROC_UNSET,
	38	RPCBPROC_GETPORT,
	39	RPCBPROC_GETADDR = 3, /* alias for GETPORT */
	40	RPCBPROC_DUMP,
	41	RPCBPROC_CALLIT,
	42	RPCBPROC_BCAST = 5, /* alias for CALLIT */
	43	RPCBPROC_GETTIME,
	44	RPCBPROC_UADDR2TADDR,
	45	RPCBPROC_TADDR2UADDR,
	46	RPCBPROC_GETVERSADDR,
	47	RPCBPROC_INDIRECT,
	48	RPCBPROC_GETADDRLIST,
	49	RPCBPROC_GETSTAT,
	50	};
	51
	52	#define RPCB_HIGHPROC_2 RPCBPROC_CALLIT
	53	#define RPCB_HIGHPROC_3 RPCBPROC_TADDR2UADDR
	54	#define RPCB_HIGHPROC_4 RPCBPROC_GETSTAT
	55
	56	/*
	57	* r_addr
	58	*
	59	* Quoting RFC 3530, section 2.2:
	60	*
	61	* For TCP over IPv4 and for UDP over IPv4, the format of r_addr is the
	62	* US-ASCII string:
	63	*
	64	* h1.h2.h3.h4.p1.p2
	65	*
	66	* The prefix, "h1.h2.h3.h4", is the standard textual form for
	67	* representing an IPv4 address, which is always four octets long.
	68	* Assuming big-endian ordering, h1, h2, h3, and h4, are respectively,
	69	* the first through fourth octets each converted to ASCII-decimal.
	70	* Assuming big-endian ordering, p1 and p2 are, respectively, the first
	71	* and second octets each converted to ASCII-decimal. For example, if a
	72	* host, in big-endian order, has an address of 0x0A010307 and there is
	73	* a service listening on, in big endian order, port 0x020F (decimal
	74	* 527), then the complete universal address is "10.1.3.7.2.15".
	75	*
	76	* ...
	77	*
	78	* For TCP over IPv6 and for UDP over IPv6, the format of r_addr is the
	79	* US-ASCII string:
	80	*
	81	* x1:x2:x3:x4:x5:x6:x7:x8.p1.p2
	82	*
	83	* The suffix "p1.p2" is the service port, and is computed the same way
	84	* as with universal addresses for TCP and UDP over IPv4. The prefix,
85	* "x1:x2:x3:x4:x5:x6:x7:x8", is the standard textual form for
86	* representing an IPv6 address as defined in Section 2.2 of [RFC2373].
87	* Additionally, the two alternative forms specified in Section 2.2 of
88	* [RFC2373] are also acceptable.
89	*
90	* XXX: Currently this implementation does not explicitly convert the
91	* stored address to US-ASCII on non-ASCII systems.
92	*/
93	#define RPCB_MAXADDRLEN (128u)
94
a509050b CL	95	/*
	96	* r_owner
	97	*
	98	* The "owner" is allowed to unset a service in the rpcbind database.
	99	* We always use the following (arbitrary) fixed string.
	100	*/
	101	#define RPCB_OWNER_STRING "rpcb"
	102	#define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING)
	103
	104	static void rpcb_getport_done(struct rpc_task , void );
	105	extern struct rpc_program rpcb_program;
	106
	107	struct rpcbind_args {
	108	struct rpc_xprt * r_xprt;
	109
	110	u32 r_prog;
	111	u32 r_vers;
	112	u32 r_prot;
	113	unsigned short r_port;
	114	char * r_netid;
	115	char r_addr[RPCB_MAXADDRLEN];
	116	char * r_owner;
	117	};
	118
	119	static struct rpc_procinfo rpcb_procedures2[];
	120	static struct rpc_procinfo rpcb_procedures3[];
	121
d5b64430	122	struct rpcb_info {
a509050b CL	123	int rpc_vers;
a509050b CL	124	struct rpc_procinfo * rpc_proc;
d5b64430 CL	125	};
	126
	127	static struct rpcb_info rpcb_next_version[];
	128	static struct rpcb_info rpcb_next_version6[];
a509050b CL	129
	130	static void rpcb_getport_prepare(struct rpc_task task, void calldata)
	131	{
	132	struct rpcbind_args *map = calldata;
	133	struct rpc_xprt *xprt = map->r_xprt;
	134	struct rpc_message msg = {
	135	.rpc_proc = rpcb_next_version[xprt->bind_index].rpc_proc,
	136	.rpc_argp = map,
	137	.rpc_resp = &map->r_port,
	138	};
	139
	140	rpc_call_setup(task, &msg, 0);
	141	}
	142
	143	static void rpcb_map_release(void *data)
	144	{
	145	struct rpcbind_args *map = data;
	146
	147	xprt_put(map->r_xprt);
	148	kfree(map);
	149	}
	150
	151	static const struct rpc_call_ops rpcb_getport_ops = {
	152	.rpc_call_prepare = rpcb_getport_prepare,
	153	.rpc_call_done = rpcb_getport_done,
	154	.rpc_release = rpcb_map_release,
	155	};
	156
	157	static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status)
	158	{
	159	xprt_clear_binding(xprt);
	160	rpc_wake_up_status(&xprt->binding, status);
	161	}
	162
	163	static struct rpc_clnt rpcb_create(char hostname, struct sockaddr *srvaddr,
	164	int proto, int version, int privileged)
	165	{
	166	struct rpc_create_args args = {
	167	.protocol = proto,
	168	.address = srvaddr,
	169	.addrsize = sizeof(struct sockaddr_in),
	170	.servername = hostname,
	171	.program = &rpcb_program,
	172	.version = version,
	173	.authflavor = RPC_AUTH_UNIX,
f7fb558e CL	174	.flags = (RPC_CLNT_CREATE_NOPING \|
f7fb558e CL	175	RPC_CLNT_CREATE_INTR),
a509050b CL	176	};
a509050b CL	177
d5b64430 CL	178	switch (srvaddr->sa_family) {
	179	case AF_INET:
	180	((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
	181	break;
	182	case AF_INET6:
	183	((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT);
	184	break;
	185	default:
	186	return NULL;
	187	}
	188
a509050b CL	189	if (!privileged)
	190	args.flags \|= RPC_CLNT_CREATE_NONPRIVPORT;
	191	return rpc_create(&args);
	192	}
	193
	194	/**
	195	* rpcb_register - set or unset a port registration with the local rpcbind svc
	196	* @prog: RPC program number to bind
	197	* @vers: RPC version number to bind
	198	* @prot: transport protocol to use to make this request
	199	* @port: port value to register
	200	* @okay: result code
	201	*
	202	* port == 0 means unregister, port != 0 means register.
	203	*
	204	* This routine supports only rpcbind version 2.
	205	*/
	206	int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
	207	{
	208	struct sockaddr_in sin = {
	209	.sin_family = AF_INET,
	210	.sin_addr.s_addr = htonl(INADDR_LOOPBACK),
	211	};
	212	struct rpcbind_args map = {
	213	.r_prog = prog,
	214	.r_vers = vers,
	215	.r_prot = prot,
	216	.r_port = port,
	217	};
	218	struct rpc_message msg = {
	219	.rpc_proc = &rpcb_procedures2[port ?
	220	RPCBPROC_SET : RPCBPROC_UNSET],
	221	.rpc_argp = &map,
	222	.rpc_resp = okay,
	223	};
	224	struct rpc_clnt *rpcb_clnt;
	225	int error = 0;
	226
	227	dprintk("RPC: %sregistering (%u, %u, %d, %u) with local "
	228	"rpcbind\n", (port ? "" : "un"),
	229	prog, vers, prot, port);
	230
	231	rpcb_clnt = rpcb_create("localhost", (struct sockaddr *) &sin,
	232	IPPROTO_UDP, 2, 1);
	233	if (IS_ERR(rpcb_clnt))
	234	return PTR_ERR(rpcb_clnt);
	235
	236	error = rpc_call_sync(rpcb_clnt, &msg, 0);
	237
90c5755f	238	rpc_shutdown_client(rpcb_clnt);
a509050b CL	239	if (error < 0)
	240	printk(KERN_WARNING "RPC: failed to contact local rpcbind "
	241	"server (errno %d).\n", -error);
	242	dprintk("RPC: registration status %d/%d\n", error, *okay);
	243
	244	return error;
	245	}
	246
a509050b	247	/**
cce63cd6	248	* rpcb_getport_sync - obtain the port for an RPC service on a given host
a509050b CL	249	* @sin: address of remote peer
	250	* @prog: RPC program number to bind
	251	* @vers: RPC version number to bind
	252	* @prot: transport protocol to use to make this request
	253	*
	254	* Called from outside the RPC client in a synchronous task context.
cce63cd6	255	* Uses default timeout parameters specified by underlying transport.
a509050b	256	*
cce63cd6	257	* XXX: Needs to support IPv6, and rpcbind versions 3 and 4
a509050b	258	*/
cce63cd6 CL	259	int rpcb_getport_sync(struct sockaddr_in *sin, __u32 prog,
cce63cd6 CL	260	__u32 vers, int prot)
a509050b CL	261	{
	262	struct rpcbind_args map = {
	263	.r_prog = prog,
	264	.r_vers = vers,
	265	.r_prot = prot,
	266	.r_port = 0,
	267	};
	268	struct rpc_message msg = {
	269	.rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT],
	270	.rpc_argp = &map,
	271	.rpc_resp = &map.r_port,
	272	};
	273	struct rpc_clnt *rpcb_clnt;
	274	char hostname[40];
	275	int status;
	276
cce63cd6 CL	277	dprintk("RPC: %s(" NIPQUAD_FMT ", %u, %u, %d)\n",
cce63cd6 CL	278	__FUNCTION__, NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
a509050b	279
cce63cd6	280	sprintf(hostname, NIPQUAD_FMT, NIPQUAD(sin->sin_addr.s_addr));
a509050b CL	281	rpcb_clnt = rpcb_create(hostname, (struct sockaddr *)sin, prot, 2, 0);
	282	if (IS_ERR(rpcb_clnt))
	283	return PTR_ERR(rpcb_clnt);
	284
	285	status = rpc_call_sync(rpcb_clnt, &msg, 0);
90c5755f	286	rpc_shutdown_client(rpcb_clnt);
a509050b CL	287
	288	if (status >= 0) {
	289	if (map.r_port != 0)
	290	return map.r_port;
	291	status = -EACCES;
	292	}
	293	return status;
	294	}
cce63cd6	295	EXPORT_SYMBOL_GPL(rpcb_getport_sync);
a509050b CL	296
a509050b CL	297	/**
45160d62	298	* rpcb_getport_async - obtain the port for a given RPC service on a given host
a509050b CL	299	* @task: task that is waiting for portmapper request
	300	*
	301	* This one can be called for an ongoing RPC request, and can be used in
	302	* an async (rpciod) context.
	303	*/
45160d62	304	void rpcb_getport_async(struct rpc_task *task)
a509050b CL	305	{
	306	struct rpc_clnt *clnt = task->tk_client;
	307	int bind_version;
	308	struct rpc_xprt *xprt = task->tk_xprt;
	309	struct rpc_clnt *rpcb_clnt;
	310	static struct rpcbind_args *map;
	311	struct rpc_task *child;
	312	struct sockaddr addr;
	313	int status;
d5b64430	314	struct rpcb_info *info;
a509050b	315
45160d62 CL	316	dprintk("RPC: %5u %s(%s, %u, %u, %d)\n",
	317	task->tk_pid, __FUNCTION__,
	318	clnt->cl_server, clnt->cl_prog, clnt->cl_vers, xprt->prot);
a509050b CL	319
	320	/* Autobind on cloned rpc clients is discouraged */
	321	BUG_ON(clnt->cl_parent != clnt);
	322
	323	if (xprt_test_and_set_binding(xprt)) {
2429cbf6	324	status = -EAGAIN; /* tell caller to check again */
45160d62 CL	325	dprintk("RPC: %5u %s: waiting for another binder\n",
45160d62 CL	326	task->tk_pid, __FUNCTION__);
a509050b CL	327	goto bailout_nowake;
	328	}
	329
	330	/* Put self on queue before sending rpcbind request, in case
	331	* rpcb_getport_done completes before we return from rpc_run_task */
	332	rpc_sleep_on(&xprt->binding, task, NULL, NULL);
	333
	334	/* Someone else may have bound if we slept */
	335	if (xprt_bound(xprt)) {
	336	status = 0;
45160d62 CL	337	dprintk("RPC: %5u %s: already bound\n",
45160d62 CL	338	task->tk_pid, __FUNCTION__);
a509050b CL	339	goto bailout_nofree;
	340	}
	341
d5b64430 CL	342	rpc_peeraddr(clnt, (void *)&addr, sizeof(addr));
	343
	344	/* Don't ever use rpcbind v2 for AF_INET6 requests */
	345	switch (addr.sa_family) {
	346	case AF_INET:
	347	info = rpcb_next_version;
	348	break;
	349	case AF_INET6:
	350	info = rpcb_next_version6;
	351	break;
	352	default:
	353	status = -EAFNOSUPPORT;
	354	dprintk("RPC: %5u %s: bad address family\n",
	355	task->tk_pid, __FUNCTION__);
	356	goto bailout_nofree;
	357	}
	358	if (info[xprt->bind_index].rpc_proc == NULL) {
a509050b	359	xprt->bind_index = 0;
906462af	360	status = -EPFNOSUPPORT;
45160d62 CL	361	dprintk("RPC: %5u %s: no more getport versions available\n",
45160d62 CL	362	task->tk_pid, __FUNCTION__);
a509050b CL	363	goto bailout_nofree;
a509050b CL	364	}
d5b64430	365	bind_version = info[xprt->bind_index].rpc_vers;
a509050b	366
45160d62 CL	367	dprintk("RPC: %5u %s: trying rpcbind version %u\n",
45160d62 CL	368	task->tk_pid, __FUNCTION__, bind_version);
a509050b	369
143b6c40 CL	370	rpcb_clnt = rpcb_create(clnt->cl_server, &addr, xprt->prot,
	371	bind_version, 0);
	372	if (IS_ERR(rpcb_clnt)) {
	373	status = PTR_ERR(rpcb_clnt);
	374	dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n",
	375	task->tk_pid, __FUNCTION__, PTR_ERR(rpcb_clnt));
	376	goto bailout_nofree;
	377	}
	378
a509050b CL	379	map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC);
	380	if (!map) {
	381	status = -ENOMEM;
45160d62 CL	382	dprintk("RPC: %5u %s: no memory available\n",
45160d62 CL	383	task->tk_pid, __FUNCTION__);
a509050b CL	384	goto bailout_nofree;
	385	}
	386	map->r_prog = clnt->cl_prog;
	387	map->r_vers = clnt->cl_vers;
	388	map->r_prot = xprt->prot;
	389	map->r_port = 0;
	390	map->r_xprt = xprt_get(xprt);
4417c8c4	391	map->r_netid = rpc_peeraddr2str(clnt, RPC_DISPLAY_NETID);
6d0aa06a	392	memcpy(map->r_addr,
143b6c40 CL	393	rpc_peeraddr2str(rpcb_clnt, RPC_DISPLAY_UNIVERSAL_ADDR),
143b6c40 CL	394	sizeof(map->r_addr));
a509050b CL	395	map->r_owner = RPCB_OWNER_STRING; /* ignored for GETADDR */
a509050b CL	396
a509050b	397	child = rpc_run_task(rpcb_clnt, RPC_TASK_ASYNC, &rpcb_getport_ops, map);
4c402b40	398	rpc_release_client(rpcb_clnt);
a509050b CL	399	if (IS_ERR(child)) {
a509050b CL	400	status = -EIO;
45160d62 CL	401	dprintk("RPC: %5u %s: rpc_run_task failed\n",
45160d62 CL	402	task->tk_pid, __FUNCTION__);
143b6c40	403	goto bailout;
a509050b CL	404	}
	405	rpc_put_task(child);
	406
	407	task->tk_xprt->stat.bind_count++;
	408	return;
	409
	410	bailout:
	411	kfree(map);
	412	xprt_put(xprt);
	413	bailout_nofree:
	414	rpcb_wake_rpcbind_waiters(xprt, status);
	415	bailout_nowake:
	416	task->tk_status = status;
	417	}
12444809	418	EXPORT_SYMBOL_GPL(rpcb_getport_async);
a509050b CL	419
	420	/*
	421	* Rpcbind child task calls this callback via tk_exit.
	422	*/
	423	static void rpcb_getport_done(struct rpc_task child, void data)
	424	{
	425	struct rpcbind_args *map = data;
	426	struct rpc_xprt *xprt = map->r_xprt;
	427	int status = child->tk_status;
	428
4784cb51 CL	429	/* Garbage reply: retry with a lesser rpcbind version */
	430	if (status == -EIO)
	431	status = -EPROTONOSUPPORT;
	432
a509050b CL	433	/* rpcbind server doesn't support this rpcbind protocol version */
	434	if (status == -EPROTONOSUPPORT)
	435	xprt->bind_index++;
	436
	437	if (status < 0) {
	438	/* rpcbind server not available on remote host? */
	439	xprt->ops->set_port(xprt, 0);
	440	} else if (map->r_port == 0) {
	441	/* Requested RPC service wasn't registered on remote host */
	442	xprt->ops->set_port(xprt, 0);
	443	status = -EACCES;
	444	} else {
	445	/* Succeeded */
	446	xprt->ops->set_port(xprt, map->r_port);
	447	xprt_set_bound(xprt);
	448	status = 0;
	449	}
	450
	451	dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
	452	child->tk_pid, status, map->r_port);
	453
	454	rpcb_wake_rpcbind_waiters(xprt, status);
	455	}
	456
	457	static int rpcb_encode_mapping(struct rpc_rqst req, __be32 p,
	458	struct rpcbind_args *rpcb)
	459	{
	460	dprintk("RPC: rpcb_encode_mapping(%u, %u, %d, %u)\n",
	461	rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port);
	462	*p++ = htonl(rpcb->r_prog);
	463	*p++ = htonl(rpcb->r_vers);
	464	*p++ = htonl(rpcb->r_prot);
	465	*p++ = htonl(rpcb->r_port);
	466
	467	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
	468	return 0;
	469	}
	470
	471	static int rpcb_decode_getport(struct rpc_rqst req, __be32 p,
	472	unsigned short *portp)
	473	{
	474	portp = (unsigned short) ntohl(p++);
	475	dprintk("RPC: rpcb_decode_getport result %u\n",
	476	*portp);
	477	return 0;
	478	}
	479
	480	static int rpcb_decode_set(struct rpc_rqst req, __be32 p,
	481	unsigned int *boolp)
	482	{
	483	boolp = (unsigned int) ntohl(p++);
	484	dprintk("RPC: rpcb_decode_set result %u\n",
	485	*boolp);
	486	return 0;
	487	}
	488
	489	static int rpcb_encode_getaddr(struct rpc_rqst req, __be32 p,
	490	struct rpcbind_args *rpcb)
	491	{
	492	dprintk("RPC: rpcb_encode_getaddr(%u, %u, %s)\n",
	493	rpcb->r_prog, rpcb->r_vers, rpcb->r_addr);
	494	*p++ = htonl(rpcb->r_prog);
	495	*p++ = htonl(rpcb->r_vers);
	496
497	p = xdr_encode_string(p, rpcb->r_netid);
498	p = xdr_encode_string(p, rpcb->r_addr);
499	p = xdr_encode_string(p, rpcb->r_owner);
500
501	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
502
503	return 0;
504	}
505
506	static int rpcb_decode_getaddr(struct rpc_rqst req, __be32 p,
507	unsigned short *portp)
508	{
509	char *addr;
adc24df8 CL	510	u32 addr_len;
adc24df8 CL	511	int c, i, f, first, val;
a509050b CL	512
a509050b CL	513	*portp = 0;
adc24df8	514	addr_len = ntohl(*p++);
a509050b	515
e65fe397 CL	516	/*
	517	* Simple sanity check. The smallest possible universal
	518	* address is an IPv4 address string containing 11 bytes.
	519	*/
	520	if (addr_len < 11 \|\| addr_len > RPCB_MAXADDRLEN)
	521	goto out_err;
	522
	523	/*
	524	* Start at the end and walk backwards until the first dot
	525	* is encountered. When the second dot is found, we have
	526	* both parts of the port number.
	527	*/
a509050b CL	528	addr = (char *)p;
	529	val = 0;
	530	first = 1;
	531	f = 1;
	532	for (i = addr_len - 1; i > 0; i--) {
	533	c = addr[i];
	534	if (c >= '0' && c <= '9') {
	535	val += (c - '0') * f;
	536	f *= 10;
	537	} else if (c == '.') {
	538	if (first) {
	539	*portp = val;
	540	val = first = 0;
	541	f = 1;
	542	} else {
	543	*portp \|= (val << 8);
	544	break;
	545	}
	546	}
	547	}
	548
e65fe397 CL	549	/*
	550	* Simple sanity check. If we never saw a dot in the reply,
	551	* then this was probably just garbage.
	552	*/
	553	if (first)
	554	goto out_err;
	555
a509050b CL	556	dprintk("RPC: rpcb_decode_getaddr port=%u\n", *portp);
a509050b CL	557	return 0;
e65fe397 CL	558
	559	out_err:
	560	dprintk("RPC: rpcbind server returned malformed reply\n");
	561	return -EIO;
a509050b CL	562	}
	563
	564	#define RPCB_program_sz (1u)
	565	#define RPCB_version_sz (1u)
	566	#define RPCB_protocol_sz (1u)
	567	#define RPCB_port_sz (1u)
	568	#define RPCB_boolean_sz (1u)
	569
4f40ee4a	570	#define RPCB_netid_sz (1+XDR_QUADLEN(RPCBIND_MAXNETIDLEN))
a509050b CL	571	#define RPCB_addr_sz (1+XDR_QUADLEN(RPCB_MAXADDRLEN))
	572	#define RPCB_ownerstring_sz (1+XDR_QUADLEN(RPCB_MAXOWNERLEN))
	573
	574	#define RPCB_mappingargs_sz RPCB_program_sz+RPCB_version_sz+ \
	575	RPCB_protocol_sz+RPCB_port_sz
	576	#define RPCB_getaddrargs_sz RPCB_program_sz+RPCB_version_sz+ \
	577	RPCB_netid_sz+RPCB_addr_sz+ \
	578	RPCB_ownerstring_sz
	579
	580	#define RPCB_setres_sz RPCB_boolean_sz
	581	#define RPCB_getportres_sz RPCB_port_sz
	582
	583	/*
	584	* Note that RFC 1833 does not put any size restrictions on the
	585	* address string returned by the remote rpcbind database.
	586	*/
	587	#define RPCB_getaddrres_sz RPCB_addr_sz
	588
	589	#define PROC(proc, argtype, restype) \
	590	[RPCBPROC_##proc] = { \
	591	.p_proc = RPCBPROC_##proc, \
	592	.p_encode = (kxdrproc_t) rpcb_encode_##argtype, \
	593	.p_decode = (kxdrproc_t) rpcb_decode_##restype, \
	594	.p_arglen = RPCB_##argtype##args_sz, \
	595	.p_replen = RPCB_##restype##res_sz, \
	596	.p_statidx = RPCBPROC_##proc, \
	597	.p_timer = 0, \
	598	.p_name = #proc, \
	599	}
	600
	601	/*
	602	* Not all rpcbind procedures described in RFC 1833 are implemented
	603	* since the Linux kernel RPC code requires only these.
	604	*/
	605	static struct rpc_procinfo rpcb_procedures2[] = {
	606	PROC(SET, mapping, set),
	607	PROC(UNSET, mapping, set),
	608	PROC(GETADDR, mapping, getport),
	609	};
	610
	611	static struct rpc_procinfo rpcb_procedures3[] = {
	612	PROC(SET, mapping, set),
	613	PROC(UNSET, mapping, set),
	614	PROC(GETADDR, getaddr, getaddr),
	615	};
	616
	617	static struct rpc_procinfo rpcb_procedures4[] = {
	618	PROC(SET, mapping, set),
	619	PROC(UNSET, mapping, set),
	620	PROC(GETVERSADDR, getaddr, getaddr),
	621	};
	622
	623	static struct rpcb_info rpcb_next_version[] = {
	624	#ifdef CONFIG_SUNRPC_BIND34
	625	{ 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
	626	{ 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
	627	#endif
	628	{ 2, &rpcb_procedures2[RPCBPROC_GETPORT] },
	629	{ 0, NULL },
	630	};
	631
d5b64430 CL	632	static struct rpcb_info rpcb_next_version6[] = {
	633	#ifdef CONFIG_SUNRPC_BIND34
	634	{ 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
	635	{ 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
	636	#endif
	637	{ 0, NULL },
	638	};
	639
a509050b CL	640	static struct rpc_version rpcb_version2 = {
	641	.number = 2,
	642	.nrprocs = RPCB_HIGHPROC_2,
	643	.procs = rpcb_procedures2
	644	};
	645
	646	static struct rpc_version rpcb_version3 = {
	647	.number = 3,
	648	.nrprocs = RPCB_HIGHPROC_3,
	649	.procs = rpcb_procedures3
	650	};
	651
	652	static struct rpc_version rpcb_version4 = {
	653	.number = 4,
	654	.nrprocs = RPCB_HIGHPROC_4,
	655	.procs = rpcb_procedures4
	656	};
	657
	658	static struct rpc_version *rpcb_version[] = {
	659	NULL,
	660	NULL,
	661	&rpcb_version2,
	662	&rpcb_version3,
	663	&rpcb_version4
	664	};
	665
	666	static struct rpc_stat rpcb_stats;
	667
	668	struct rpc_program rpcb_program = {
	669	.name = "rpcbind",
	670	.number = RPCBIND_PROGRAM,
	671	.nrvers = ARRAY_SIZE(rpcb_version),
	672	.version = rpcb_version,
	673	.stats = &rpcb_stats,
	674	};