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/types.h>
  16 #include <linux/socket.h>
  17 #include <linux/kernel.h>
  18 #include <linux/errno.h>
  19
  20 #include <linux/sunrpc/clnt.h>
  21 #include <linux/sunrpc/sched.h>
  22
  23 #ifdef RPC_DEBUG
  24 # define RPCDBG_FACILITY        RPCDBG_BIND
  25 #endif
  26
  27 #define RPCBIND_PROGRAM         (100000u)
  28 #define RPCBIND_PORT            (111u)
  29
  30 enum {
  31         RPCBPROC_NULL,
  32         RPCBPROC_SET,
  33         RPCBPROC_UNSET,
  34         RPCBPROC_GETPORT,
  35         RPCBPROC_GETADDR = 3,           /* alias for GETPORT */
  36         RPCBPROC_DUMP,
  37         RPCBPROC_CALLIT,
  38         RPCBPROC_BCAST = 5,             /* alias for CALLIT */
  39         RPCBPROC_GETTIME,
  40         RPCBPROC_UADDR2TADDR,
  41         RPCBPROC_TADDR2UADDR,
  42         RPCBPROC_GETVERSADDR,
  43         RPCBPROC_INDIRECT,
  44         RPCBPROC_GETADDRLIST,
  45         RPCBPROC_GETSTAT,
  46 };
  47
  48 #define RPCB_HIGHPROC_2         RPCBPROC_CALLIT
  49 #define RPCB_HIGHPROC_3         RPCBPROC_TADDR2UADDR
  50 #define RPCB_HIGHPROC_4         RPCBPROC_GETSTAT
  51
  52 /*
  53  * r_addr
  54  *
  55  * Quoting RFC 3530, section 2.2:
  56  *
  57  * For TCP over IPv4 and for UDP over IPv4, the format of r_addr is the
  58  * US-ASCII string:
  59  *
  60  *      h1.h2.h3.h4.p1.p2
  61  *
  62  * The prefix, "h1.h2.h3.h4", is the standard textual form for
  63  * representing an IPv4 address, which is always four octets long.
  64  * Assuming big-endian ordering, h1, h2, h3, and h4, are respectively,
  65  * the first through fourth octets each converted to ASCII-decimal.
  66  * Assuming big-endian ordering, p1 and p2 are, respectively, the first
  67  * and second octets each converted to ASCII-decimal.  For example, if a
  68  * host, in big-endian order, has an address of 0x0A010307 and there is
  69  * a service listening on, in big endian order, port 0x020F (decimal
  70  * 527), then the complete universal address is "10.1.3.7.2.15".
  71  *
  72  * ...
  73  *
  74  * For TCP over IPv6 and for UDP over IPv6, the format of r_addr is the
  75  * US-ASCII string:
  76  *
  77  *      x1:x2:x3:x4:x5:x6:x7:x8.p1.p2
  78  *
  79  * The suffix "p1.p2" is the service port, and is computed the same way
  80  * as with universal addresses for TCP and UDP over IPv4.  The prefix,
  81  * "x1:x2:x3:x4:x5:x6:x7:x8", is the standard textual form for
  82  * representing an IPv6 address as defined in Section 2.2 of [RFC2373].
  83  * Additionally, the two alternative forms specified in Section 2.2 of
  84  * [RFC2373] are also acceptable.
  85  *
  86  * XXX: Currently this implementation does not explicitly convert the
  87  *      stored address to US-ASCII on non-ASCII systems.
  88  */
  89 #define RPCB_MAXADDRLEN         (128u)
  90
  91 /*
  92  * r_netid
  93  *
  94  * Quoting RFC 3530, section 2.2:
  95  *
  96  * For TCP over IPv4 the value of r_netid is the string "tcp".  For UDP
  97  * over IPv4 the value of r_netid is the string "udp".
  98  *
  99  * ...
 100  *
 101  * For TCP over IPv6 the value of r_netid is the string "tcp6".  For UDP
 102  * over IPv6 the value of r_netid is the string "udp6".
 103  */
 104 #define RPCB_NETID_UDP  "\165\144\160"          /* "udp" */
 105 #define RPCB_NETID_TCP  "\164\143\160"          /* "tcp" */
 106 #define RPCB_NETID_UDP6 "\165\144\160\066"      /* "udp6" */
 107 #define RPCB_NETID_TCP6 "\164\143\160\066"      /* "tcp6" */
 108
 109 #define RPCB_MAXNETIDLEN        (4u)
 110
 111 /*
 112  * r_owner
 113  *
 114  * The "owner" is allowed to unset a service in the rpcbind database.
 115  * We always use the following (arbitrary) fixed string.
 116  */
 117 #define RPCB_OWNER_STRING       "rpcb"
 118 #define RPCB_MAXOWNERLEN        sizeof(RPCB_OWNER_STRING)
 119
 120 static void                     rpcb_getport_done(struct rpc_task *, void *);
 121 extern struct rpc_program       rpcb_program;
 122
 123 struct rpcbind_args {
 124         struct rpc_xprt *       r_xprt;
 125
 126         u32                     r_prog;
 127         u32                     r_vers;
 128         u32                     r_prot;
 129         unsigned short          r_port;
 130         char *                  r_netid;
 131         char                    r_addr[RPCB_MAXADDRLEN];
 132         char *                  r_owner;
 133 };
 134
 135 static struct rpc_procinfo rpcb_procedures2[];
 136 static struct rpc_procinfo rpcb_procedures3[];
 137
 138 static struct rpcb_info {
 139         int                     rpc_vers;
 140         struct rpc_procinfo *   rpc_proc;
 141 } rpcb_next_version[];
 142
 143 static void rpcb_getport_prepare(struct rpc_task *task, void *calldata)
 144 {
 145         struct rpcbind_args *map = calldata;
 146         struct rpc_xprt *xprt = map->r_xprt;
 147         struct rpc_message msg = {
 148                 .rpc_proc       = rpcb_next_version[xprt->bind_index].rpc_proc,
 149                 .rpc_argp       = map,
 150                 .rpc_resp       = &map->r_port,
 151         };
 152
 153         rpc_call_setup(task, &msg, 0);
 154 }
 155
 156 static void rpcb_map_release(void *data)
 157 {
 158         struct rpcbind_args *map = data;
 159
 160         xprt_put(map->r_xprt);
 161         kfree(map);
 162 }
 163
 164 static const struct rpc_call_ops rpcb_getport_ops = {
 165         .rpc_call_prepare       = rpcb_getport_prepare,
 166         .rpc_call_done          = rpcb_getport_done,
 167         .rpc_release            = rpcb_map_release,
 168 };
 169
 170 static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status)
 171 {
 172         xprt_clear_binding(xprt);
 173         rpc_wake_up_status(&xprt->binding, status);
 174 }
 175
 176 static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
 177                                         int proto, int version, int privileged)
 178 {
 179         struct rpc_create_args args = {
 180                 .protocol       = proto,
 181                 .address        = srvaddr,
 182                 .addrsize       = sizeof(struct sockaddr_in),
 183                 .servername     = hostname,
 184                 .program        = &rpcb_program,
 185                 .version        = version,
 186                 .authflavor     = RPC_AUTH_UNIX,
 187                 .flags          = RPC_CLNT_CREATE_NOPING,
 188         };
 189
 190         ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
 191         if (!privileged)
 192                 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
 193         return rpc_create(&args);
 194 }
 195
 196 /**
 197  * rpcb_register - set or unset a port registration with the local rpcbind svc
 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  * @port: port value to register
 202  * @okay: result code
 203  *
 204  * port == 0 means unregister, port != 0 means register.
 205  *
 206  * This routine supports only rpcbind version 2.
 207  */
 208 int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
 209 {
 210         struct sockaddr_in sin = {
 211                 .sin_family             = AF_INET,
 212                 .sin_addr.s_addr        = htonl(INADDR_LOOPBACK),
 213         };
 214         struct rpcbind_args map = {
 215                 .r_prog         = prog,
 216                 .r_vers         = vers,
 217                 .r_prot         = prot,
 218                 .r_port         = port,
 219         };
 220         struct rpc_message msg = {
 221                 .rpc_proc       = &rpcb_procedures2[port ?
 222                                         RPCBPROC_SET : RPCBPROC_UNSET],
 223                 .rpc_argp       = &map,
 224                 .rpc_resp       = okay,
 225         };
 226         struct rpc_clnt *rpcb_clnt;
 227         int error = 0;
 228
 229         dprintk("RPC:       %sregistering (%u, %u, %d, %u) with local "
 230                         "rpcbind\n", (port ? "" : "un"),
 231                         prog, vers, prot, port);
 232
 233         rpcb_clnt = rpcb_create("localhost", (struct sockaddr *) &sin,
 234                                         IPPROTO_UDP, 2, 1);
 235         if (IS_ERR(rpcb_clnt))
 236                 return PTR_ERR(rpcb_clnt);
 237
 238         error = rpc_call_sync(rpcb_clnt, &msg, 0);
 239
 240         rpc_shutdown_client(rpcb_clnt);
 241         if (error < 0)
 242                 printk(KERN_WARNING "RPC: failed to contact local rpcbind "
 243                                 "server (errno %d).\n", -error);
 244         dprintk("RPC:       registration status %d/%d\n", error, *okay);
 245
 246         return error;
 247 }
 248
 249 #ifdef CONFIG_ROOT_NFS
 250 /**
 251  * rpcb_getport_external - obtain the port for an RPC service on a given host
 252  * @sin: address of remote peer
 253  * @prog: RPC program number to bind
 254  * @vers: RPC version number to bind
 255  * @prot: transport protocol to use to make this request
 256  *
 257  * Called from outside the RPC client in a synchronous task context.
 258  *
 259  * For now, this supports only version 2 queries, but is used only by
 260  * mount_clnt for NFS_ROOT.
 261  */
 262 int rpcb_getport_external(struct sockaddr_in *sin, __u32 prog,
 263                                 __u32 vers, int prot)
 264 {
 265         struct rpcbind_args map = {
 266                 .r_prog         = prog,
 267                 .r_vers         = vers,
 268                 .r_prot         = prot,
 269                 .r_port         = 0,
 270         };
 271         struct rpc_message msg = {
 272                 .rpc_proc       = &rpcb_procedures2[RPCBPROC_GETPORT],
 273                 .rpc_argp       = &map,
 274                 .rpc_resp       = &map.r_port,
 275         };
 276         struct rpc_clnt *rpcb_clnt;
 277         char hostname[40];
 278         int status;
 279
 280         dprintk("RPC:       rpcb_getport_external(%u.%u.%u.%u, %u, %u, %d)\n",
 281                         NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
 282
 283         sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(sin->sin_addr.s_addr));
 284         rpcb_clnt = rpcb_create(hostname, (struct sockaddr *)sin, prot, 2, 0);
 285         if (IS_ERR(rpcb_clnt))
 286                 return PTR_ERR(rpcb_clnt);
 287
 288         status = rpc_call_sync(rpcb_clnt, &msg, 0);
 289         rpc_shutdown_client(rpcb_clnt);
 290
 291         if (status >= 0) {
 292                 if (map.r_port != 0)
 293                         return map.r_port;
 294                 status = -EACCES;
 295         }
 296         return status;
 297 }
 298 #endif
 299
 300 /**
 301  * rpcb_getport - obtain the port for a given RPC service on a given host
 302  * @task: task that is waiting for portmapper request
 303  *
 304  * This one can be called for an ongoing RPC request, and can be used in
 305  * an async (rpciod) context.
 306  */
 307 void rpcb_getport(struct rpc_task *task)
 308 {
 309         struct rpc_clnt *clnt = task->tk_client;
 310         int bind_version;
 311         struct rpc_xprt *xprt = task->tk_xprt;
 312         struct rpc_clnt *rpcb_clnt;
 313         static struct rpcbind_args *map;
 314         struct rpc_task *child;
 315         struct sockaddr addr;
 316         int status;
 317
 318         dprintk("RPC: %5u rpcb_getport(%s, %u, %u, %d)\n",
 319                         task->tk_pid, clnt->cl_server,
 320                         clnt->cl_prog, clnt->cl_vers, xprt->prot);
 321
 322         /* Autobind on cloned rpc clients is discouraged */
 323         BUG_ON(clnt->cl_parent != clnt);
 324
 325         if (xprt_test_and_set_binding(xprt)) {
 326                 status = -EACCES;               /* tell caller to check again */
 327                 dprintk("RPC: %5u rpcb_getport waiting for another binder\n",
 328                                 task->tk_pid);
 329                 goto bailout_nowake;
 330         }
 331
 332         /* Put self on queue before sending rpcbind request, in case
 333          * rpcb_getport_done completes before we return from rpc_run_task */
 334         rpc_sleep_on(&xprt->binding, task, NULL, NULL);
 335
 336         /* Someone else may have bound if we slept */
 337         if (xprt_bound(xprt)) {
 338                 status = 0;
 339                 dprintk("RPC: %5u rpcb_getport already bound\n", task->tk_pid);
 340                 goto bailout_nofree;
 341         }
 342
 343         if (rpcb_next_version[xprt->bind_index].rpc_proc == NULL) {
 344                 xprt->bind_index = 0;
 345                 status = -EACCES;       /* tell caller to try again later */
 346                 dprintk("RPC: %5u rpcb_getport no more getport versions "
 347                                 "available\n", task->tk_pid);
 348                 goto bailout_nofree;
 349         }
 350         bind_version = rpcb_next_version[xprt->bind_index].rpc_vers;
 351
 352         dprintk("RPC: %5u rpcb_getport trying rpcbind version %u\n",
 353                         task->tk_pid, bind_version);
 354
 355         map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC);
 356         if (!map) {
 357                 status = -ENOMEM;
 358                 dprintk("RPC: %5u rpcb_getport no memory available\n",
 359                                 task->tk_pid);
 360                 goto bailout_nofree;
 361         }
 362         map->r_prog = clnt->cl_prog;
 363         map->r_vers = clnt->cl_vers;
 364         map->r_prot = xprt->prot;
 365         map->r_port = 0;
 366         map->r_xprt = xprt_get(xprt);
 367         map->r_netid = (xprt->prot == IPPROTO_TCP) ? RPCB_NETID_TCP :
 368                                                    RPCB_NETID_UDP;
 369         memcpy(&map->r_addr, rpc_peeraddr2str(clnt, RPC_DISPLAY_ADDR),
 370                         sizeof(map->r_addr));
 371         map->r_owner = RPCB_OWNER_STRING;       /* ignored for GETADDR */
 372
 373         rpc_peeraddr(clnt, (void *)&addr, sizeof(addr));
 374         rpcb_clnt = rpcb_create(clnt->cl_server, &addr, xprt->prot, bind_version, 0);
 375         if (IS_ERR(rpcb_clnt)) {
 376                 status = PTR_ERR(rpcb_clnt);
 377                 dprintk("RPC: %5u rpcb_getport rpcb_create failed, error %ld\n",
 378                                 task->tk_pid, PTR_ERR(rpcb_clnt));
 379                 goto bailout;
 380         }
 381
 382         child = rpc_run_task(rpcb_clnt, RPC_TASK_ASYNC, &rpcb_getport_ops, map);
 383         rpc_destroy_client(rpcb_clnt);
 384         if (IS_ERR(child)) {
 385                 status = -EIO;
 386                 dprintk("RPC: %5u rpcb_getport rpc_run_task failed\n",
 387                                 task->tk_pid);
 388                 goto bailout_nofree;
 389         }
 390         rpc_put_task(child);
 391
 392         task->tk_xprt->stat.bind_count++;
 393         return;
 394
 395 bailout:
 396         kfree(map);
 397         xprt_put(xprt);
 398 bailout_nofree:
 399         rpcb_wake_rpcbind_waiters(xprt, status);
 400 bailout_nowake:
 401         task->tk_status = status;
 402 }
 403
 404 /*
 405  * Rpcbind child task calls this callback via tk_exit.
 406  */
 407 static void rpcb_getport_done(struct rpc_task *child, void *data)
 408 {
 409         struct rpcbind_args *map = data;
 410         struct rpc_xprt *xprt = map->r_xprt;
 411         int status = child->tk_status;
 412
 413         /* rpcbind server doesn't support this rpcbind protocol version */
 414         if (status == -EPROTONOSUPPORT)
 415                 xprt->bind_index++;
 416
 417         if (status < 0) {
 418                 /* rpcbind server not available on remote host? */
 419                 xprt->ops->set_port(xprt, 0);
 420         } else if (map->r_port == 0) {
 421                 /* Requested RPC service wasn't registered on remote host */
 422                 xprt->ops->set_port(xprt, 0);
 423                 status = -EACCES;
 424         } else {
 425                 /* Succeeded */
 426                 xprt->ops->set_port(xprt, map->r_port);
 427                 xprt_set_bound(xprt);
 428                 status = 0;
 429         }
 430
 431         dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
 432                         child->tk_pid, status, map->r_port);
 433
 434         rpcb_wake_rpcbind_waiters(xprt, status);
 435 }
 436
 437 static int rpcb_encode_mapping(struct rpc_rqst *req, __be32 *p,
 438                                struct rpcbind_args *rpcb)
 439 {
 440         dprintk("RPC:       rpcb_encode_mapping(%u, %u, %d, %u)\n",
 441                         rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port);
 442         *p++ = htonl(rpcb->r_prog);
 443         *p++ = htonl(rpcb->r_vers);
 444         *p++ = htonl(rpcb->r_prot);
 445         *p++ = htonl(rpcb->r_port);
 446
 447         req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
 448         return 0;
 449 }
 450
 451 static int rpcb_decode_getport(struct rpc_rqst *req, __be32 *p,
 452                                unsigned short *portp)
 453 {
 454         *portp = (unsigned short) ntohl(*p++);
 455         dprintk("RPC:      rpcb_decode_getport result %u\n",
 456                         *portp);
 457         return 0;
 458 }
 459
 460 static int rpcb_decode_set(struct rpc_rqst *req, __be32 *p,
 461                            unsigned int *boolp)
 462 {
 463         *boolp = (unsigned int) ntohl(*p++);
 464         dprintk("RPC:      rpcb_decode_set result %u\n",
 465                         *boolp);
 466         return 0;
 467 }
 468
 469 static int rpcb_encode_getaddr(struct rpc_rqst *req, __be32 *p,
 470                                struct rpcbind_args *rpcb)
 471 {
 472         dprintk("RPC:       rpcb_encode_getaddr(%u, %u, %s)\n",
 473                         rpcb->r_prog, rpcb->r_vers, rpcb->r_addr);
 474         *p++ = htonl(rpcb->r_prog);
 475         *p++ = htonl(rpcb->r_vers);
 476
 477         p = xdr_encode_string(p, rpcb->r_netid);
 478         p = xdr_encode_string(p, rpcb->r_addr);
 479         p = xdr_encode_string(p, rpcb->r_owner);
 480
 481         req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
 482
 483         return 0;
 484 }
 485
 486 static int rpcb_decode_getaddr(struct rpc_rqst *req, __be32 *p,
 487                                unsigned short *portp)
 488 {
 489         char *addr;
 490         int addr_len, c, i, f, first, val;
 491
 492         *portp = 0;
 493         addr_len = (unsigned int) ntohl(*p++);
 494         if (addr_len > RPCB_MAXADDRLEN)                 /* sanity */
 495                 return -EINVAL;
 496
 497         dprintk("RPC:       rpcb_decode_getaddr returned string: '%s'\n",
 498                         (char *) p);
 499
 500         addr = (char *)p;
 501         val = 0;
 502         first = 1;
 503         f = 1;
 504         for (i = addr_len - 1; i > 0; i--) {
 505                 c = addr[i];
 506                 if (c >= '0' && c <= '9') {
 507                         val += (c - '0') * f;
 508                         f *= 10;
 509                 } else if (c == '.') {
 510                         if (first) {
 511                                 *portp = val;
 512                                 val = first = 0;
 513                                 f = 1;
 514                         } else {
 515                                 *portp |= (val << 8);
 516                                 break;
 517                         }
 518                 }
 519         }
 520
 521         dprintk("RPC:       rpcb_decode_getaddr port=%u\n", *portp);
 522         return 0;
 523 }
 524
 525 #define RPCB_program_sz         (1u)
 526 #define RPCB_version_sz         (1u)
 527 #define RPCB_protocol_sz        (1u)
 528 #define RPCB_port_sz            (1u)
 529 #define RPCB_boolean_sz         (1u)
 530
 531 #define RPCB_netid_sz           (1+XDR_QUADLEN(RPCB_MAXNETIDLEN))
 532 #define RPCB_addr_sz            (1+XDR_QUADLEN(RPCB_MAXADDRLEN))
 533 #define RPCB_ownerstring_sz     (1+XDR_QUADLEN(RPCB_MAXOWNERLEN))
 534
 535 #define RPCB_mappingargs_sz     RPCB_program_sz+RPCB_version_sz+        \
 536                                 RPCB_protocol_sz+RPCB_port_sz
 537 #define RPCB_getaddrargs_sz     RPCB_program_sz+RPCB_version_sz+        \
 538                                 RPCB_netid_sz+RPCB_addr_sz+             \
 539                                 RPCB_ownerstring_sz
 540
 541 #define RPCB_setres_sz          RPCB_boolean_sz
 542 #define RPCB_getportres_sz      RPCB_port_sz
 543
 544 /*
 545  * Note that RFC 1833 does not put any size restrictions on the
 546  * address string returned by the remote rpcbind database.
 547  */
 548 #define RPCB_getaddrres_sz      RPCB_addr_sz
 549
 550 #define PROC(proc, argtype, restype)                                    \
 551         [RPCBPROC_##proc] = {                                           \
 552                 .p_proc         = RPCBPROC_##proc,                      \
 553                 .p_encode       = (kxdrproc_t) rpcb_encode_##argtype,   \
 554                 .p_decode       = (kxdrproc_t) rpcb_decode_##restype,   \
 555                 .p_arglen       = RPCB_##argtype##args_sz,              \
 556                 .p_replen       = RPCB_##restype##res_sz,               \
 557                 .p_statidx      = RPCBPROC_##proc,                      \
 558                 .p_timer        = 0,                                    \
 559                 .p_name         = #proc,                                \
 560         }
 561
 562 /*
 563  * Not all rpcbind procedures described in RFC 1833 are implemented
 564  * since the Linux kernel RPC code requires only these.
 565  */
 566 static struct rpc_procinfo rpcb_procedures2[] = {
 567         PROC(SET,               mapping,        set),
 568         PROC(UNSET,             mapping,        set),
 569         PROC(GETADDR,           mapping,        getport),
 570 };
 571
 572 static struct rpc_procinfo rpcb_procedures3[] = {
 573         PROC(SET,               mapping,        set),
 574         PROC(UNSET,             mapping,        set),
 575         PROC(GETADDR,           getaddr,        getaddr),
 576 };
 577
 578 static struct rpc_procinfo rpcb_procedures4[] = {
 579         PROC(SET,               mapping,        set),
 580         PROC(UNSET,             mapping,        set),
 581         PROC(GETVERSADDR,       getaddr,        getaddr),
 582 };
 583
 584 static struct rpcb_info rpcb_next_version[] = {
 585 #ifdef CONFIG_SUNRPC_BIND34
 586         { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
 587         { 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
 588 #endif
 589         { 2, &rpcb_procedures2[RPCBPROC_GETPORT] },
 590         { 0, NULL },
 591 };
 592
 593 static struct rpc_version rpcb_version2 = {
 594         .number         = 2,
 595         .nrprocs        = RPCB_HIGHPROC_2,
 596         .procs          = rpcb_procedures2
 597 };
 598
 599 static struct rpc_version rpcb_version3 = {
 600         .number         = 3,
 601         .nrprocs        = RPCB_HIGHPROC_3,
 602         .procs          = rpcb_procedures3
 603 };
 604
 605 static struct rpc_version rpcb_version4 = {
 606         .number         = 4,
 607         .nrprocs        = RPCB_HIGHPROC_4,
 608         .procs          = rpcb_procedures4
 609 };
 610
 611 static struct rpc_version *rpcb_version[] = {
 612         NULL,
 613         NULL,
 614         &rpcb_version2,
 615         &rpcb_version3,
 616         &rpcb_version4
 617 };
 618
 619 static struct rpc_stat rpcb_stats;
 620
 621 struct rpc_program rpcb_program = {
 622         .name           = "rpcbind",
 623         .number         = RPCBIND_PROGRAM,
 624         .nrvers         = ARRAY_SIZE(rpcb_version),
 625         .version        = rpcb_version,
 626         .stats          = &rpcb_stats,
 627 };