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_ONESHOT |
 188                                    RPC_CLNT_CREATE_NOPING),
 189         };
 190
 191         ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
 192         if (!privileged)
 193                 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
 194         return rpc_create(&args);
 195 }
 196
 197 /**
 198  * rpcb_register - set or unset a port registration with the local rpcbind svc
 199  * @prog: RPC program number to bind
 200  * @vers: RPC version number to bind
 201  * @prot: transport protocol to use to make this request
 202  * @port: port value to register
 203  * @okay: result code
 204  *
 205  * port == 0 means unregister, port != 0 means register.
 206  *
 207  * This routine supports only rpcbind version 2.
 208  */
 209 int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
 210 {
 211         struct sockaddr_in sin = {
 212                 .sin_family             = AF_INET,
 213                 .sin_addr.s_addr        = htonl(INADDR_LOOPBACK),
 214         };
 215         struct rpcbind_args map = {
 216                 .r_prog         = prog,
 217                 .r_vers         = vers,
 218                 .r_prot         = prot,
 219                 .r_port         = port,
 220         };
 221         struct rpc_message msg = {
 222                 .rpc_proc       = &rpcb_procedures2[port ?
 223                                         RPCBPROC_SET : RPCBPROC_UNSET],
 224                 .rpc_argp       = &map,
 225                 .rpc_resp       = okay,
 226         };
 227         struct rpc_clnt *rpcb_clnt;
 228         int error = 0;
 229
 230         dprintk("RPC:       %sregistering (%u, %u, %d, %u) with local "
 231                         "rpcbind\n", (port ? "" : "un"),
 232                         prog, vers, prot, port);
 233
 234         rpcb_clnt = rpcb_create("localhost", (struct sockaddr *) &sin,
 235                                         IPPROTO_UDP, 2, 1);
 236         if (IS_ERR(rpcb_clnt))
 237                 return PTR_ERR(rpcb_clnt);
 238
 239         error = rpc_call_sync(rpcb_clnt, &msg, 0);
 240
 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
 290         if (status >= 0) {
 291                 if (map.r_port != 0)
 292                         return map.r_port;
 293                 status = -EACCES;
 294         }
 295         return status;
 296 }
 297 #endif
 298
 299 /**
 300  * rpcb_getport - obtain the port for a given RPC service on a given host
 301  * @task: task that is waiting for portmapper request
 302  *
 303  * This one can be called for an ongoing RPC request, and can be used in
 304  * an async (rpciod) context.
 305  */
 306 void rpcb_getport(struct rpc_task *task)
 307 {
 308         struct rpc_clnt *clnt = task->tk_client;
 309         int bind_version;
 310         struct rpc_xprt *xprt = task->tk_xprt;
 311         struct rpc_clnt *rpcb_clnt;
 312         static struct rpcbind_args *map;
 313         struct rpc_task *child;
 314         struct sockaddr addr;
 315         int status;
 316
 317         dprintk("RPC: %5u rpcb_getport(%s, %u, %u, %d)\n",
 318                         task->tk_pid, clnt->cl_server,
 319                         clnt->cl_prog, clnt->cl_vers, xprt->prot);
 320
 321         /* Autobind on cloned rpc clients is discouraged */
 322         BUG_ON(clnt->cl_parent != clnt);
 323
 324         if (xprt_test_and_set_binding(xprt)) {
 325                 status = -EACCES;               /* tell caller to check again */
 326                 dprintk("RPC: %5u rpcb_getport waiting for another binder\n",
 327                                 task->tk_pid);
 328                 goto bailout_nowake;
 329         }
 330
 331         /* Put self on queue before sending rpcbind request, in case
 332          * rpcb_getport_done completes before we return from rpc_run_task */
 333         rpc_sleep_on(&xprt->binding, task, NULL, NULL);
 334
 335         /* Someone else may have bound if we slept */
 336         if (xprt_bound(xprt)) {
 337                 status = 0;
 338                 dprintk("RPC: %5u rpcb_getport already bound\n", task->tk_pid);
 339                 goto bailout_nofree;
 340         }
 341
 342         if (rpcb_next_version[xprt->bind_index].rpc_proc == NULL) {
 343                 xprt->bind_index = 0;
 344                 status = -EACCES;       /* tell caller to try again later */
 345                 dprintk("RPC: %5u rpcb_getport no more getport versions "
 346                                 "available\n", task->tk_pid);
 347                 goto bailout_nofree;
 348         }
 349         bind_version = rpcb_next_version[xprt->bind_index].rpc_vers;
 350
 351         dprintk("RPC: %5u rpcb_getport trying rpcbind version %u\n",
 352                         task->tk_pid, bind_version);
 353
 354         map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC);
 355         if (!map) {
 356                 status = -ENOMEM;
 357                 dprintk("RPC: %5u rpcb_getport no memory available\n",
 358                                 task->tk_pid);
 359                 goto bailout_nofree;
 360         }
 361         map->r_prog = clnt->cl_prog;
 362         map->r_vers = clnt->cl_vers;
 363         map->r_prot = xprt->prot;
 364         map->r_port = 0;
 365         map->r_xprt = xprt_get(xprt);
 366         map->r_netid = (xprt->prot == IPPROTO_TCP) ? RPCB_NETID_TCP :
 367                                                    RPCB_NETID_UDP;
 368         memcpy(&map->r_addr, rpc_peeraddr2str(clnt, RPC_DISPLAY_ADDR),
 369                         sizeof(map->r_addr));
 370         map->r_owner = RPCB_OWNER_STRING;       /* ignored for GETADDR */
 371
 372         rpc_peeraddr(clnt, (void *)&addr, sizeof(addr));
 373         rpcb_clnt = rpcb_create(clnt->cl_server, &addr, xprt->prot, bind_version, 0);
 374         if (IS_ERR(rpcb_clnt)) {
 375                 status = PTR_ERR(rpcb_clnt);
 376                 dprintk("RPC: %5u rpcb_getport rpcb_create failed, error %ld\n",
 377                                 task->tk_pid, PTR_ERR(rpcb_clnt));
 378                 goto bailout;
 379         }
 380
 381         child = rpc_run_task(rpcb_clnt, RPC_TASK_ASYNC, &rpcb_getport_ops, map);
 382         if (IS_ERR(child)) {
 383                 status = -EIO;
 384                 dprintk("RPC: %5u rpcb_getport rpc_run_task failed\n",
 385                                 task->tk_pid);
 386                 goto bailout_nofree;
 387         }
 388         rpc_put_task(child);
 389
 390         task->tk_xprt->stat.bind_count++;
 391         return;
 392
 393 bailout:
 394         kfree(map);
 395         xprt_put(xprt);
 396 bailout_nofree:
 397         rpcb_wake_rpcbind_waiters(xprt, status);
 398 bailout_nowake:
 399         task->tk_status = status;
 400 }
 401
 402 /*
 403  * Rpcbind child task calls this callback via tk_exit.
 404  */
 405 static void rpcb_getport_done(struct rpc_task *child, void *data)
 406 {
 407         struct rpcbind_args *map = data;
 408         struct rpc_xprt *xprt = map->r_xprt;
 409         int status = child->tk_status;
 410
 411         /* rpcbind server doesn't support this rpcbind protocol version */
 412         if (status == -EPROTONOSUPPORT)
 413                 xprt->bind_index++;
 414
 415         if (status < 0) {
 416                 /* rpcbind server not available on remote host? */
 417                 xprt->ops->set_port(xprt, 0);
 418         } else if (map->r_port == 0) {
 419                 /* Requested RPC service wasn't registered on remote host */
 420                 xprt->ops->set_port(xprt, 0);
 421                 status = -EACCES;
 422         } else {
 423                 /* Succeeded */
 424                 xprt->ops->set_port(xprt, map->r_port);
 425                 xprt_set_bound(xprt);
 426                 status = 0;
 427         }
 428
 429         dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
 430                         child->tk_pid, status, map->r_port);
 431
 432         rpcb_wake_rpcbind_waiters(xprt, status);
 433 }
 434
 435 static int rpcb_encode_mapping(struct rpc_rqst *req, __be32 *p,
 436                                struct rpcbind_args *rpcb)
 437 {
 438         dprintk("RPC:       rpcb_encode_mapping(%u, %u, %d, %u)\n",
 439                         rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port);
 440         *p++ = htonl(rpcb->r_prog);
 441         *p++ = htonl(rpcb->r_vers);
 442         *p++ = htonl(rpcb->r_prot);
 443         *p++ = htonl(rpcb->r_port);
 444
 445         req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
 446         return 0;
 447 }
 448
 449 static int rpcb_decode_getport(struct rpc_rqst *req, __be32 *p,
 450                                unsigned short *portp)
 451 {
 452         *portp = (unsigned short) ntohl(*p++);
 453         dprintk("RPC:      rpcb_decode_getport result %u\n",
 454                         *portp);
 455         return 0;
 456 }
 457
 458 static int rpcb_decode_set(struct rpc_rqst *req, __be32 *p,
 459                            unsigned int *boolp)
 460 {
 461         *boolp = (unsigned int) ntohl(*p++);
 462         dprintk("RPC:      rpcb_decode_set result %u\n",
 463                         *boolp);
 464         return 0;
 465 }
 466
 467 static int rpcb_encode_getaddr(struct rpc_rqst *req, __be32 *p,
 468                                struct rpcbind_args *rpcb)
 469 {
 470         dprintk("RPC:       rpcb_encode_getaddr(%u, %u, %s)\n",
 471                         rpcb->r_prog, rpcb->r_vers, rpcb->r_addr);
 472         *p++ = htonl(rpcb->r_prog);
 473         *p++ = htonl(rpcb->r_vers);
 474
 475         p = xdr_encode_string(p, rpcb->r_netid);
 476         p = xdr_encode_string(p, rpcb->r_addr);
 477         p = xdr_encode_string(p, rpcb->r_owner);
 478
 479         req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
 480
 481         return 0;
 482 }
 483
 484 static int rpcb_decode_getaddr(struct rpc_rqst *req, __be32 *p,
 485                                unsigned short *portp)
 486 {
 487         char *addr;
 488         int addr_len, c, i, f, first, val;
 489
 490         *portp = 0;
 491         addr_len = (unsigned int) ntohl(*p++);
 492         if (addr_len > RPCB_MAXADDRLEN)                 /* sanity */
 493                 return -EINVAL;
 494
 495         dprintk("RPC:       rpcb_decode_getaddr returned string: '%s'\n",
 496                         (char *) p);
 497
 498         addr = (char *)p;
 499         val = 0;
 500         first = 1;
 501         f = 1;
 502         for (i = addr_len - 1; i > 0; i--) {
 503                 c = addr[i];
 504                 if (c >= '0' && c <= '9') {
 505                         val += (c - '0') * f;
 506                         f *= 10;
 507                 } else if (c == '.') {
 508                         if (first) {
 509                                 *portp = val;
 510                                 val = first = 0;
 511                                 f = 1;
 512                         } else {
 513                                 *portp |= (val << 8);
 514                                 break;
 515                         }
 516                 }
 517         }
 518
 519         dprintk("RPC:       rpcb_decode_getaddr port=%u\n", *portp);
 520         return 0;
 521 }
 522
 523 #define RPCB_program_sz         (1u)
 524 #define RPCB_version_sz         (1u)
 525 #define RPCB_protocol_sz        (1u)
 526 #define RPCB_port_sz            (1u)
 527 #define RPCB_boolean_sz         (1u)
 528
 529 #define RPCB_netid_sz           (1+XDR_QUADLEN(RPCB_MAXNETIDLEN))
 530 #define RPCB_addr_sz            (1+XDR_QUADLEN(RPCB_MAXADDRLEN))
 531 #define RPCB_ownerstring_sz     (1+XDR_QUADLEN(RPCB_MAXOWNERLEN))
 532
 533 #define RPCB_mappingargs_sz     RPCB_program_sz+RPCB_version_sz+        \
 534                                 RPCB_protocol_sz+RPCB_port_sz
 535 #define RPCB_getaddrargs_sz     RPCB_program_sz+RPCB_version_sz+        \
 536                                 RPCB_netid_sz+RPCB_addr_sz+             \
 537                                 RPCB_ownerstring_sz
 538
 539 #define RPCB_setres_sz          RPCB_boolean_sz
 540 #define RPCB_getportres_sz      RPCB_port_sz
 541
 542 /*
 543  * Note that RFC 1833 does not put any size restrictions on the
 544  * address string returned by the remote rpcbind database.
 545  */
 546 #define RPCB_getaddrres_sz      RPCB_addr_sz
 547
 548 #define PROC(proc, argtype, restype)                                    \
 549         [RPCBPROC_##proc] = {                                           \
 550                 .p_proc         = RPCBPROC_##proc,                      \
 551                 .p_encode       = (kxdrproc_t) rpcb_encode_##argtype,   \
 552                 .p_decode       = (kxdrproc_t) rpcb_decode_##restype,   \
 553                 .p_arglen       = RPCB_##argtype##args_sz,              \
 554                 .p_replen       = RPCB_##restype##res_sz,               \
 555                 .p_statidx      = RPCBPROC_##proc,                      \
 556                 .p_timer        = 0,                                    \
 557                 .p_name         = #proc,                                \
 558         }
 559
 560 /*
 561  * Not all rpcbind procedures described in RFC 1833 are implemented
 562  * since the Linux kernel RPC code requires only these.
 563  */
 564 static struct rpc_procinfo rpcb_procedures2[] = {
 565         PROC(SET,               mapping,        set),
 566         PROC(UNSET,             mapping,        set),
 567         PROC(GETADDR,           mapping,        getport),
 568 };
 569
 570 static struct rpc_procinfo rpcb_procedures3[] = {
 571         PROC(SET,               mapping,        set),
 572         PROC(UNSET,             mapping,        set),
 573         PROC(GETADDR,           getaddr,        getaddr),
 574 };
 575
 576 static struct rpc_procinfo rpcb_procedures4[] = {
 577         PROC(SET,               mapping,        set),
 578         PROC(UNSET,             mapping,        set),
 579         PROC(GETVERSADDR,       getaddr,        getaddr),
 580 };
 581
 582 static struct rpcb_info rpcb_next_version[] = {
 583 #ifdef CONFIG_SUNRPC_BIND34
 584         { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
 585         { 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
 586 #endif
 587         { 2, &rpcb_procedures2[RPCBPROC_GETPORT] },
 588         { 0, NULL },
 589 };
 590
 591 static struct rpc_version rpcb_version2 = {
 592         .number         = 2,
 593         .nrprocs        = RPCB_HIGHPROC_2,
 594         .procs          = rpcb_procedures2
 595 };
 596
 597 static struct rpc_version rpcb_version3 = {
 598         .number         = 3,
 599         .nrprocs        = RPCB_HIGHPROC_3,
 600         .procs          = rpcb_procedures3
 601 };
 602
 603 static struct rpc_version rpcb_version4 = {
 604         .number         = 4,
 605         .nrprocs        = RPCB_HIGHPROC_4,
 606         .procs          = rpcb_procedures4
 607 };
 608
 609 static struct rpc_version *rpcb_version[] = {
 610         NULL,
 611         NULL,
 612         &rpcb_version2,
 613         &rpcb_version3,
 614         &rpcb_version4
 615 };
 616
 617 static struct rpc_stat rpcb_stats;
 618
 619 struct rpc_program rpcb_program = {
 620         .name           = "rpcbind",
 621         .number         = RPCBIND_PROGRAM,
 622         .nrvers         = ARRAY_SIZE(rpcb_version),
 623         .version        = rpcb_version,
 624         .stats          = &rpcb_stats,
 625 };