[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_netid
 *
 * Quoting RFC 3530, section 2.2:
 *
 * For TCP over IPv4 the value of r_netid is the string "tcp".  For UDP
 * over IPv4 the value of r_netid is the string "udp".
 *
 * ...
 *
 * For TCP over IPv6 the value of r_netid is the string "tcp6".  For UDP
 * over IPv6 the value of r_netid is the string "udp6".
 */
#define RPCB_NETID_UDP	"\165\144\160"		/* "udp" */
#define RPCB_NETID_TCP	"\164\143\160"		/* "tcp" */
#define RPCB_NETID_UDP6	"\165\144\160\066"	/* "udp6" */
#define RPCB_NETID_TCP6	"\164\143\160\066"	/* "tcp6" */

#define RPCB_MAXNETIDLEN	(4u)

/*
 * 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 = -EACCES;		/* 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 = -EACCES;	/* tell caller to try again later */
		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 = (xprt->prot == IPPROTO_TCP) ? RPCB_NETID_TCP :
						   RPCB_NETID_UDP;
	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;
}

/*
 * 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;

	/* 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++);
	if (addr_len > RPCB_MAXADDRLEN)			/* sanity */
		return -EINVAL;

	dprintk("RPC:       rpcb_decode_getaddr returned string: '%s'\n",
			(char *) p);

	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;
			}
		}
	}

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

#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(RPCB_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
95	/*
96	* r_netid
97	*
98	* Quoting RFC 3530, section 2.2:
99	*
100	* For TCP over IPv4 the value of r_netid is the string "tcp". For UDP
101	* over IPv4 the value of r_netid is the string "udp".
102	*
103	* ...
104	*
105	* For TCP over IPv6 the value of r_netid is the string "tcp6". For UDP
106	* over IPv6 the value of r_netid is the string "udp6".
107	*/
108	#define RPCB_NETID_UDP "\165\144\160" /* "udp" */
109	#define RPCB_NETID_TCP "\164\143\160" /* "tcp" */
110	#define RPCB_NETID_UDP6 "\165\144\160\066" /* "udp6" */
111	#define RPCB_NETID_TCP6 "\164\143\160\066" /* "tcp6" */
112
113	#define RPCB_MAXNETIDLEN (4u)
114
115	/*
116	* r_owner
117	*
118	* The "owner" is allowed to unset a service in the rpcbind database.
119	* We always use the following (arbitrary) fixed string.
120	*/
121	#define RPCB_OWNER_STRING "rpcb"
122	#define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING)
123
124	static void rpcb_getport_done(struct rpc_task , void );
125	extern struct rpc_program rpcb_program;
126
127	struct rpcbind_args {
128	struct rpc_xprt * r_xprt;
129
130	u32 r_prog;
131	u32 r_vers;
132	u32 r_prot;
133	unsigned short r_port;
134	char * r_netid;
135	char r_addr[RPCB_MAXADDRLEN];
136	char * r_owner;
137	};
138
139	static struct rpc_procinfo rpcb_procedures2[];
140	static struct rpc_procinfo rpcb_procedures3[];
141
d5b64430	142	struct rpcb_info {
a509050b CL	143	int rpc_vers;
a509050b CL	144	struct rpc_procinfo * rpc_proc;
d5b64430 CL	145	};
	146
	147	static struct rpcb_info rpcb_next_version[];
	148	static struct rpcb_info rpcb_next_version6[];
a509050b CL	149
	150	static void rpcb_getport_prepare(struct rpc_task task, void calldata)
	151	{
	152	struct rpcbind_args *map = calldata;
	153	struct rpc_xprt *xprt = map->r_xprt;
	154	struct rpc_message msg = {
	155	.rpc_proc = rpcb_next_version[xprt->bind_index].rpc_proc,
	156	.rpc_argp = map,
	157	.rpc_resp = &map->r_port,
	158	};
	159
	160	rpc_call_setup(task, &msg, 0);
	161	}
	162
	163	static void rpcb_map_release(void *data)
	164	{
	165	struct rpcbind_args *map = data;
	166
	167	xprt_put(map->r_xprt);
	168	kfree(map);
	169	}
	170
	171	static const struct rpc_call_ops rpcb_getport_ops = {
	172	.rpc_call_prepare = rpcb_getport_prepare,
	173	.rpc_call_done = rpcb_getport_done,
	174	.rpc_release = rpcb_map_release,
	175	};
	176
	177	static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status)
	178	{
	179	xprt_clear_binding(xprt);
	180	rpc_wake_up_status(&xprt->binding, status);
	181	}
	182
	183	static struct rpc_clnt rpcb_create(char hostname, struct sockaddr *srvaddr,
	184	int proto, int version, int privileged)
	185	{
	186	struct rpc_create_args args = {
	187	.protocol = proto,
	188	.address = srvaddr,
	189	.addrsize = sizeof(struct sockaddr_in),
	190	.servername = hostname,
	191	.program = &rpcb_program,
	192	.version = version,
	193	.authflavor = RPC_AUTH_UNIX,
f7fb558e CL	194	.flags = (RPC_CLNT_CREATE_NOPING \|
f7fb558e CL	195	RPC_CLNT_CREATE_INTR),
a509050b CL	196	};
a509050b CL	197
d5b64430 CL	198	switch (srvaddr->sa_family) {
	199	case AF_INET:
	200	((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
	201	break;
	202	case AF_INET6:
	203	((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT);
	204	break;
	205	default:
	206	return NULL;
	207	}
	208
a509050b CL	209	if (!privileged)
	210	args.flags \|= RPC_CLNT_CREATE_NONPRIVPORT;
	211	return rpc_create(&args);
	212	}
	213
	214	/**
	215	* rpcb_register - set or unset a port registration with the local rpcbind svc
	216	* @prog: RPC program number to bind
	217	* @vers: RPC version number to bind
	218	* @prot: transport protocol to use to make this request
	219	* @port: port value to register
	220	* @okay: result code
	221	*
	222	* port == 0 means unregister, port != 0 means register.
	223	*
	224	* This routine supports only rpcbind version 2.
	225	*/
	226	int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
	227	{
	228	struct sockaddr_in sin = {
	229	.sin_family = AF_INET,
	230	.sin_addr.s_addr = htonl(INADDR_LOOPBACK),
	231	};
	232	struct rpcbind_args map = {
	233	.r_prog = prog,
	234	.r_vers = vers,
	235	.r_prot = prot,
	236	.r_port = port,
	237	};
	238	struct rpc_message msg = {
	239	.rpc_proc = &rpcb_procedures2[port ?
	240	RPCBPROC_SET : RPCBPROC_UNSET],
	241	.rpc_argp = &map,
	242	.rpc_resp = okay,
	243	};
	244	struct rpc_clnt *rpcb_clnt;
	245	int error = 0;
	246
	247	dprintk("RPC: %sregistering (%u, %u, %d, %u) with local "
	248	"rpcbind\n", (port ? "" : "un"),
	249	prog, vers, prot, port);
	250
	251	rpcb_clnt = rpcb_create("localhost", (struct sockaddr *) &sin,
	252	IPPROTO_UDP, 2, 1);
	253	if (IS_ERR(rpcb_clnt))
	254	return PTR_ERR(rpcb_clnt);
	255
	256	error = rpc_call_sync(rpcb_clnt, &msg, 0);
	257
90c5755f	258	rpc_shutdown_client(rpcb_clnt);
a509050b CL	259	if (error < 0)
	260	printk(KERN_WARNING "RPC: failed to contact local rpcbind "
	261	"server (errno %d).\n", -error);
	262	dprintk("RPC: registration status %d/%d\n", error, *okay);
	263
	264	return error;
	265	}
	266
a509050b	267	/**
cce63cd6	268	* rpcb_getport_sync - obtain the port for an RPC service on a given host
a509050b CL	269	* @sin: address of remote peer
	270	* @prog: RPC program number to bind
	271	* @vers: RPC version number to bind
	272	* @prot: transport protocol to use to make this request
	273	*
	274	* Called from outside the RPC client in a synchronous task context.
cce63cd6	275	* Uses default timeout parameters specified by underlying transport.
a509050b	276	*
cce63cd6	277	* XXX: Needs to support IPv6, and rpcbind versions 3 and 4
a509050b	278	*/
cce63cd6 CL	279	int rpcb_getport_sync(struct sockaddr_in *sin, __u32 prog,
cce63cd6 CL	280	__u32 vers, int prot)
a509050b CL	281	{
	282	struct rpcbind_args map = {
	283	.r_prog = prog,
	284	.r_vers = vers,
	285	.r_prot = prot,
	286	.r_port = 0,
	287	};
	288	struct rpc_message msg = {
	289	.rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT],
	290	.rpc_argp = &map,
	291	.rpc_resp = &map.r_port,
	292	};
	293	struct rpc_clnt *rpcb_clnt;
	294	char hostname[40];
	295	int status;
	296
cce63cd6 CL	297	dprintk("RPC: %s(" NIPQUAD_FMT ", %u, %u, %d)\n",
cce63cd6 CL	298	__FUNCTION__, NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
a509050b	299
cce63cd6	300	sprintf(hostname, NIPQUAD_FMT, NIPQUAD(sin->sin_addr.s_addr));
a509050b CL	301	rpcb_clnt = rpcb_create(hostname, (struct sockaddr *)sin, prot, 2, 0);
	302	if (IS_ERR(rpcb_clnt))
	303	return PTR_ERR(rpcb_clnt);
	304
	305	status = rpc_call_sync(rpcb_clnt, &msg, 0);
90c5755f	306	rpc_shutdown_client(rpcb_clnt);
a509050b CL	307
	308	if (status >= 0) {
	309	if (map.r_port != 0)
	310	return map.r_port;
	311	status = -EACCES;
	312	}
	313	return status;
	314	}
cce63cd6	315	EXPORT_SYMBOL_GPL(rpcb_getport_sync);
a509050b CL	316
a509050b CL	317	/**
45160d62	318	* rpcb_getport_async - obtain the port for a given RPC service on a given host
a509050b CL	319	* @task: task that is waiting for portmapper request
	320	*
	321	* This one can be called for an ongoing RPC request, and can be used in
	322	* an async (rpciod) context.
	323	*/
45160d62	324	void rpcb_getport_async(struct rpc_task *task)
a509050b CL	325	{
	326	struct rpc_clnt *clnt = task->tk_client;
	327	int bind_version;
	328	struct rpc_xprt *xprt = task->tk_xprt;
	329	struct rpc_clnt *rpcb_clnt;
	330	static struct rpcbind_args *map;
	331	struct rpc_task *child;
	332	struct sockaddr addr;
	333	int status;
d5b64430	334	struct rpcb_info *info;
a509050b	335
45160d62 CL	336	dprintk("RPC: %5u %s(%s, %u, %u, %d)\n",
	337	task->tk_pid, __FUNCTION__,
	338	clnt->cl_server, clnt->cl_prog, clnt->cl_vers, xprt->prot);
a509050b CL	339
	340	/* Autobind on cloned rpc clients is discouraged */
	341	BUG_ON(clnt->cl_parent != clnt);
	342
	343	if (xprt_test_and_set_binding(xprt)) {
	344	status = -EACCES; /* tell caller to check again */
45160d62 CL	345	dprintk("RPC: %5u %s: waiting for another binder\n",
45160d62 CL	346	task->tk_pid, __FUNCTION__);
a509050b CL	347	goto bailout_nowake;
	348	}
	349
	350	/* Put self on queue before sending rpcbind request, in case
	351	* rpcb_getport_done completes before we return from rpc_run_task */
	352	rpc_sleep_on(&xprt->binding, task, NULL, NULL);
	353
	354	/* Someone else may have bound if we slept */
	355	if (xprt_bound(xprt)) {
	356	status = 0;
45160d62 CL	357	dprintk("RPC: %5u %s: already bound\n",
45160d62 CL	358	task->tk_pid, __FUNCTION__);
a509050b CL	359	goto bailout_nofree;
	360	}
	361
d5b64430 CL	362	rpc_peeraddr(clnt, (void *)&addr, sizeof(addr));
	363
	364	/* Don't ever use rpcbind v2 for AF_INET6 requests */
	365	switch (addr.sa_family) {
	366	case AF_INET:
	367	info = rpcb_next_version;
	368	break;
	369	case AF_INET6:
	370	info = rpcb_next_version6;
	371	break;
	372	default:
	373	status = -EAFNOSUPPORT;
	374	dprintk("RPC: %5u %s: bad address family\n",
	375	task->tk_pid, __FUNCTION__);
	376	goto bailout_nofree;
	377	}
	378	if (info[xprt->bind_index].rpc_proc == NULL) {
a509050b CL	379	xprt->bind_index = 0;
a509050b CL	380	status = -EACCES; /* tell caller to try again later */
45160d62 CL	381	dprintk("RPC: %5u %s: no more getport versions available\n",
45160d62 CL	382	task->tk_pid, __FUNCTION__);
a509050b CL	383	goto bailout_nofree;
a509050b CL	384	}
d5b64430	385	bind_version = info[xprt->bind_index].rpc_vers;
a509050b	386
45160d62 CL	387	dprintk("RPC: %5u %s: trying rpcbind version %u\n",
45160d62 CL	388	task->tk_pid, __FUNCTION__, bind_version);
a509050b	389
143b6c40 CL	390	rpcb_clnt = rpcb_create(clnt->cl_server, &addr, xprt->prot,
	391	bind_version, 0);
	392	if (IS_ERR(rpcb_clnt)) {
	393	status = PTR_ERR(rpcb_clnt);
	394	dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n",
	395	task->tk_pid, __FUNCTION__, PTR_ERR(rpcb_clnt));
	396	goto bailout_nofree;
	397	}
	398
a509050b CL	399	map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC);
	400	if (!map) {
	401	status = -ENOMEM;
45160d62 CL	402	dprintk("RPC: %5u %s: no memory available\n",
45160d62 CL	403	task->tk_pid, __FUNCTION__);
a509050b CL	404	goto bailout_nofree;
	405	}
	406	map->r_prog = clnt->cl_prog;
	407	map->r_vers = clnt->cl_vers;
	408	map->r_prot = xprt->prot;
	409	map->r_port = 0;
	410	map->r_xprt = xprt_get(xprt);
	411	map->r_netid = (xprt->prot == IPPROTO_TCP) ? RPCB_NETID_TCP :
	412	RPCB_NETID_UDP;
6d0aa06a	413	memcpy(map->r_addr,
143b6c40 CL	414	rpc_peeraddr2str(rpcb_clnt, RPC_DISPLAY_UNIVERSAL_ADDR),
143b6c40 CL	415	sizeof(map->r_addr));
a509050b CL	416	map->r_owner = RPCB_OWNER_STRING; /* ignored for GETADDR */
a509050b CL	417
a509050b	418	child = rpc_run_task(rpcb_clnt, RPC_TASK_ASYNC, &rpcb_getport_ops, map);
4c402b40	419	rpc_release_client(rpcb_clnt);
a509050b CL	420	if (IS_ERR(child)) {
a509050b CL	421	status = -EIO;
45160d62 CL	422	dprintk("RPC: %5u %s: rpc_run_task failed\n",
45160d62 CL	423	task->tk_pid, __FUNCTION__);
143b6c40	424	goto bailout;
a509050b CL	425	}
	426	rpc_put_task(child);
	427
	428	task->tk_xprt->stat.bind_count++;
	429	return;
	430
	431	bailout:
	432	kfree(map);
	433	xprt_put(xprt);
	434	bailout_nofree:
	435	rpcb_wake_rpcbind_waiters(xprt, status);
	436	bailout_nowake:
	437	task->tk_status = status;
	438	}
	439
	440	/*
	441	* Rpcbind child task calls this callback via tk_exit.
	442	*/
	443	static void rpcb_getport_done(struct rpc_task child, void data)
	444	{
	445	struct rpcbind_args *map = data;
	446	struct rpc_xprt *xprt = map->r_xprt;
	447	int status = child->tk_status;
	448
	449	/* rpcbind server doesn't support this rpcbind protocol version */
	450	if (status == -EPROTONOSUPPORT)
	451	xprt->bind_index++;
	452
	453	if (status < 0) {
	454	/* rpcbind server not available on remote host? */
	455	xprt->ops->set_port(xprt, 0);
	456	} else if (map->r_port == 0) {
	457	/* Requested RPC service wasn't registered on remote host */
	458	xprt->ops->set_port(xprt, 0);
	459	status = -EACCES;
	460	} else {
	461	/* Succeeded */
	462	xprt->ops->set_port(xprt, map->r_port);
	463	xprt_set_bound(xprt);
	464	status = 0;
	465	}
	466
	467	dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
	468	child->tk_pid, status, map->r_port);
	469
	470	rpcb_wake_rpcbind_waiters(xprt, status);
	471	}
	472
	473	static int rpcb_encode_mapping(struct rpc_rqst req, __be32 p,
	474	struct rpcbind_args *rpcb)
	475	{
	476	dprintk("RPC: rpcb_encode_mapping(%u, %u, %d, %u)\n",
	477	rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port);
	478	*p++ = htonl(rpcb->r_prog);
	479	*p++ = htonl(rpcb->r_vers);
	480	*p++ = htonl(rpcb->r_prot);
	481	*p++ = htonl(rpcb->r_port);
	482
	483	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
	484	return 0;
	485	}
	486
	487	static int rpcb_decode_getport(struct rpc_rqst req, __be32 p,
	488	unsigned short *portp)
489	{
490	portp = (unsigned short) ntohl(p++);
491	dprintk("RPC: rpcb_decode_getport result %u\n",
492	*portp);
493	return 0;
494	}
495
496	static int rpcb_decode_set(struct rpc_rqst req, __be32 p,
497	unsigned int *boolp)
498	{
499	boolp = (unsigned int) ntohl(p++);
500	dprintk("RPC: rpcb_decode_set result %u\n",
501	*boolp);
502	return 0;
503	}
504
505	static int rpcb_encode_getaddr(struct rpc_rqst req, __be32 p,
506	struct rpcbind_args *rpcb)
507	{
508	dprintk("RPC: rpcb_encode_getaddr(%u, %u, %s)\n",
509	rpcb->r_prog, rpcb->r_vers, rpcb->r_addr);
510	*p++ = htonl(rpcb->r_prog);
511	*p++ = htonl(rpcb->r_vers);
512
513	p = xdr_encode_string(p, rpcb->r_netid);
514	p = xdr_encode_string(p, rpcb->r_addr);
515	p = xdr_encode_string(p, rpcb->r_owner);
516
517	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
518
519	return 0;
520	}
521
522	static int rpcb_decode_getaddr(struct rpc_rqst req, __be32 p,
523	unsigned short *portp)
524	{
525	char *addr;
adc24df8 CL	526	u32 addr_len;
adc24df8 CL	527	int c, i, f, first, val;
a509050b CL	528
a509050b CL	529	*portp = 0;
adc24df8	530	addr_len = ntohl(*p++);
a509050b CL	531	if (addr_len > RPCB_MAXADDRLEN) /* sanity */
	532	return -EINVAL;
	533
	534	dprintk("RPC: rpcb_decode_getaddr returned string: '%s'\n",
	535	(char *) p);
	536
	537	addr = (char *)p;
	538	val = 0;
	539	first = 1;
	540	f = 1;
	541	for (i = addr_len - 1; i > 0; i--) {
	542	c = addr[i];
	543	if (c >= '0' && c <= '9') {
	544	val += (c - '0') * f;
	545	f *= 10;
	546	} else if (c == '.') {
	547	if (first) {
	548	*portp = val;
	549	val = first = 0;
	550	f = 1;
	551	} else {
	552	*portp \|= (val << 8);
	553	break;
	554	}
	555	}
	556	}
	557
	558	dprintk("RPC: rpcb_decode_getaddr port=%u\n", *portp);
	559	return 0;
	560	}
	561
	562	#define RPCB_program_sz (1u)
	563	#define RPCB_version_sz (1u)
	564	#define RPCB_protocol_sz (1u)
	565	#define RPCB_port_sz (1u)
	566	#define RPCB_boolean_sz (1u)
	567
	568	#define RPCB_netid_sz (1+XDR_QUADLEN(RPCB_MAXNETIDLEN))
	569	#define RPCB_addr_sz (1+XDR_QUADLEN(RPCB_MAXADDRLEN))
	570	#define RPCB_ownerstring_sz (1+XDR_QUADLEN(RPCB_MAXOWNERLEN))
	571
	572	#define RPCB_mappingargs_sz RPCB_program_sz+RPCB_version_sz+ \
	573	RPCB_protocol_sz+RPCB_port_sz
	574	#define RPCB_getaddrargs_sz RPCB_program_sz+RPCB_version_sz+ \
	575	RPCB_netid_sz+RPCB_addr_sz+ \
	576	RPCB_ownerstring_sz
	577
	578	#define RPCB_setres_sz RPCB_boolean_sz
	579	#define RPCB_getportres_sz RPCB_port_sz
	580
	581	/*
	582	* Note that RFC 1833 does not put any size restrictions on the
	583	* address string returned by the remote rpcbind database.
	584	*/
	585	#define RPCB_getaddrres_sz RPCB_addr_sz
	586
	587	#define PROC(proc, argtype, restype) \
	588	[RPCBPROC_##proc] = { \
	589	.p_proc = RPCBPROC_##proc, \
	590	.p_encode = (kxdrproc_t) rpcb_encode_##argtype, \
	591	.p_decode = (kxdrproc_t) rpcb_decode_##restype, \
	592	.p_arglen = RPCB_##argtype##args_sz, \
	593	.p_replen = RPCB_##restype##res_sz, \
	594	.p_statidx = RPCBPROC_##proc, \
595	.p_timer = 0, \
596	.p_name = #proc, \
597	}
598
599	/*
600	* Not all rpcbind procedures described in RFC 1833 are implemented
601	* since the Linux kernel RPC code requires only these.
602	*/
603	static struct rpc_procinfo rpcb_procedures2[] = {
604	PROC(SET, mapping, set),
605	PROC(UNSET, mapping, set),
606	PROC(GETADDR, mapping, getport),
607	};
608
609	static struct rpc_procinfo rpcb_procedures3[] = {
610	PROC(SET, mapping, set),
611	PROC(UNSET, mapping, set),
612	PROC(GETADDR, getaddr, getaddr),
613	};
614
615	static struct rpc_procinfo rpcb_procedures4[] = {
616	PROC(SET, mapping, set),
617	PROC(UNSET, mapping, set),
618	PROC(GETVERSADDR, getaddr, getaddr),
619	};
620
621	static struct rpcb_info rpcb_next_version[] = {
622	#ifdef CONFIG_SUNRPC_BIND34
623	{ 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
624	{ 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
625	#endif
626	{ 2, &rpcb_procedures2[RPCBPROC_GETPORT] },
627	{ 0, NULL },
628	};
629
d5b64430 CL	630	static struct rpcb_info rpcb_next_version6[] = {
	631	#ifdef CONFIG_SUNRPC_BIND34
	632	{ 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
	633	{ 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
	634	#endif
	635	{ 0, NULL },
	636	};
	637
a509050b CL	638	static struct rpc_version rpcb_version2 = {
	639	.number = 2,
	640	.nrprocs = RPCB_HIGHPROC_2,
	641	.procs = rpcb_procedures2
	642	};
	643
	644	static struct rpc_version rpcb_version3 = {
	645	.number = 3,
	646	.nrprocs = RPCB_HIGHPROC_3,
	647	.procs = rpcb_procedures3
	648	};
	649
	650	static struct rpc_version rpcb_version4 = {
	651	.number = 4,
	652	.nrprocs = RPCB_HIGHPROC_4,
	653	.procs = rpcb_procedures4
	654	};
	655
	656	static struct rpc_version *rpcb_version[] = {
	657	NULL,
	658	NULL,
	659	&rpcb_version2,
	660	&rpcb_version3,
	661	&rpcb_version4
	662	};
	663
	664	static struct rpc_stat rpcb_stats;
	665
	666	struct rpc_program rpcb_program = {
	667	.name = "rpcbind",
	668	.number = RPCBIND_PROGRAM,
	669	.nrvers = ARRAY_SIZE(rpcb_version),
	670	.version = rpcb_version,
	671	.stats = &rpcb_stats,
	672	};