net/sunrpc/rpcb_clnt.c

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