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                                    RPC_CLNT_CREATE_INTR),
 125         };
 126
 127         switch (srvaddr->sa_family) {
 128         case AF_INET:
 129                 ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
 130                 break;
 131         case AF_INET6:
 132                 ((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT);
 133                 break;
 134         default:
 135                 return NULL;
 136         }
 137
 138         if (!privileged)
 139                 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
 140         return rpc_create(&args);
 141 }
 142
 143 /**
 144  * rpcb_register - set or unset a port registration with the local rpcbind svc
 145  * @prog: RPC program number to bind
 146  * @vers: RPC version number to bind
 147  * @prot: transport protocol to use to make this request
 148  * @port: port value to register
 149  * @okay: result code
 150  *
 151  * port == 0 means unregister, port != 0 means register.
 152  *
 153  * This routine supports only rpcbind version 2.
 154  */
 155 int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
 156 {
 157         struct sockaddr_in sin = {
 158                 .sin_family             = AF_INET,
 159                 .sin_addr.s_addr        = htonl(INADDR_LOOPBACK),
 160         };
 161         struct rpcbind_args map = {
 162                 .r_prog         = prog,
 163                 .r_vers         = vers,
 164                 .r_prot         = prot,
 165                 .r_port         = port,
 166         };
 167         struct rpc_message msg = {
 168                 .rpc_proc       = &rpcb_procedures2[port ?
 169                                         RPCBPROC_SET : RPCBPROC_UNSET],
 170                 .rpc_argp       = &map,
 171                 .rpc_resp       = okay,
 172         };
 173         struct rpc_clnt *rpcb_clnt;
 174         int error = 0;
 175
 176         dprintk("RPC:       %sregistering (%u, %u, %d, %u) with local "
 177                         "rpcbind\n", (port ? "" : "un"),
 178                         prog, vers, prot, port);
 179
 180         rpcb_clnt = rpcb_create("localhost", (struct sockaddr *) &sin,
 181                                 sizeof(sin), XPRT_TRANSPORT_UDP, 2, 1);
 182         if (IS_ERR(rpcb_clnt))
 183                 return PTR_ERR(rpcb_clnt);
 184
 185         error = rpc_call_sync(rpcb_clnt, &msg, 0);
 186
 187         rpc_shutdown_client(rpcb_clnt);
 188         if (error < 0)
 189                 printk(KERN_WARNING "RPC: failed to contact local rpcbind "
 190                                 "server (errno %d).\n", -error);
 191         dprintk("RPC:       registration status %d/%d\n", error, *okay);
 192
 193         return error;
 194 }
 195
 196 /**
 197  * rpcb_getport_sync - obtain the port for an RPC service on a given host
 198  * @sin: address of remote peer
 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  *
 203  * Called from outside the RPC client in a synchronous task context.
 204  * Uses default timeout parameters specified by underlying transport.
 205  *
 206  * XXX: Needs to support IPv6, and rpcbind versions 3 and 4
 207  */
 208 int rpcb_getport_sync(struct sockaddr_in *sin, __u32 prog,
 209                       __u32 vers, int prot)
 210 {
 211         struct rpcbind_args map = {
 212                 .r_prog         = prog,
 213                 .r_vers         = vers,
 214                 .r_prot         = prot,
 215                 .r_port         = 0,
 216         };
 217         struct rpc_message msg = {
 218                 .rpc_proc       = &rpcb_procedures2[RPCBPROC_GETPORT],
 219                 .rpc_argp       = &map,
 220                 .rpc_resp       = &map.r_port,
 221         };
 222         struct rpc_clnt *rpcb_clnt;
 223         int status;
 224
 225         dprintk("RPC:       %s(" NIPQUAD_FMT ", %u, %u, %d)\n",
 226                 __FUNCTION__, NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
 227
 228         rpcb_clnt = rpcb_create(NULL, (struct sockaddr *)sin,
 229                                 sizeof(sin), prot, 2, 0);
 230         if (IS_ERR(rpcb_clnt))
 231                 return PTR_ERR(rpcb_clnt);
 232
 233         status = rpc_call_sync(rpcb_clnt, &msg, 0);
 234         rpc_shutdown_client(rpcb_clnt);
 235
 236         if (status >= 0) {
 237                 if (map.r_port != 0)
 238                         return map.r_port;
 239                 status = -EACCES;
 240         }
 241         return status;
 242 }
 243 EXPORT_SYMBOL_GPL(rpcb_getport_sync);
 244
 245 static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, struct rpcbind_args *map, int version)
 246 {
 247         struct rpc_message msg = {
 248                 .rpc_proc = rpcb_next_version[version].rpc_proc,
 249                 .rpc_argp = map,
 250                 .rpc_resp = &map->r_port,
 251         };
 252         struct rpc_task_setup task_setup_data = {
 253                 .rpc_client = rpcb_clnt,
 254                 .rpc_message = &msg,
 255                 .callback_ops = &rpcb_getport_ops,
 256                 .callback_data = map,
 257                 .flags = RPC_TASK_ASYNC,
 258         };
 259
 260         return rpc_run_task(&task_setup_data);
 261 }
 262
 263 /**
 264  * rpcb_getport_async - obtain the port for a given RPC service on a given host
 265  * @task: task that is waiting for portmapper request
 266  *
 267  * This one can be called for an ongoing RPC request, and can be used in
 268  * an async (rpciod) context.
 269  */
 270 void rpcb_getport_async(struct rpc_task *task)
 271 {
 272         struct rpc_clnt *clnt = task->tk_client;
 273         u32 bind_version;
 274         struct rpc_xprt *xprt = task->tk_xprt;
 275         struct rpc_clnt *rpcb_clnt;
 276         static struct rpcbind_args *map;
 277         struct rpc_task *child;
 278         struct sockaddr_storage addr;
 279         struct sockaddr *sap = (struct sockaddr *)&addr;
 280         size_t salen;
 281         int status;
 282         struct rpcb_info *info;
 283
 284         dprintk("RPC: %5u %s(%s, %u, %u, %d)\n",
 285                 task->tk_pid, __FUNCTION__,
 286                 clnt->cl_server, clnt->cl_prog, clnt->cl_vers, xprt->prot);
 287
 288         /* Autobind on cloned rpc clients is discouraged */
 289         BUG_ON(clnt->cl_parent != clnt);
 290
 291         if (xprt_test_and_set_binding(xprt)) {
 292                 status = -EAGAIN;       /* tell caller to check again */
 293                 dprintk("RPC: %5u %s: waiting for another binder\n",
 294                         task->tk_pid, __FUNCTION__);
 295                 goto bailout_nowake;
 296         }
 297
 298         /* Put self on queue before sending rpcbind request, in case
 299          * rpcb_getport_done completes before we return from rpc_run_task */
 300         rpc_sleep_on(&xprt->binding, task, NULL, NULL);
 301
 302         /* Someone else may have bound if we slept */
 303         if (xprt_bound(xprt)) {
 304                 status = 0;
 305                 dprintk("RPC: %5u %s: already bound\n",
 306                         task->tk_pid, __FUNCTION__);
 307                 goto bailout_nofree;
 308         }
 309
 310         salen = rpc_peeraddr(clnt, sap, sizeof(addr));
 311
 312         /* Don't ever use rpcbind v2 for AF_INET6 requests */
 313         switch (sap->sa_family) {
 314         case AF_INET:
 315                 info = rpcb_next_version;
 316                 break;
 317         case AF_INET6:
 318                 info = rpcb_next_version6;
 319                 break;
 320         default:
 321                 status = -EAFNOSUPPORT;
 322                 dprintk("RPC: %5u %s: bad address family\n",
 323                                 task->tk_pid, __FUNCTION__);
 324                 goto bailout_nofree;
 325         }
 326         if (info[xprt->bind_index].rpc_proc == NULL) {
 327                 xprt->bind_index = 0;
 328                 status = -EPFNOSUPPORT;
 329                 dprintk("RPC: %5u %s: no more getport versions available\n",
 330                         task->tk_pid, __FUNCTION__);
 331                 goto bailout_nofree;
 332         }
 333         bind_version = info[xprt->bind_index].rpc_vers;
 334
 335         dprintk("RPC: %5u %s: trying rpcbind version %u\n",
 336                 task->tk_pid, __FUNCTION__, bind_version);
 337
 338         rpcb_clnt = rpcb_create(clnt->cl_server, sap, salen, xprt->prot,
 339                                 bind_version, 0);
 340         if (IS_ERR(rpcb_clnt)) {
 341                 status = PTR_ERR(rpcb_clnt);
 342                 dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n",
 343                         task->tk_pid, __FUNCTION__, PTR_ERR(rpcb_clnt));
 344                 goto bailout_nofree;
 345         }
 346
 347         map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC);
 348         if (!map) {
 349                 status = -ENOMEM;
 350                 dprintk("RPC: %5u %s: no memory available\n",
 351                         task->tk_pid, __FUNCTION__);
 352                 goto bailout_nofree;
 353         }
 354         map->r_prog = clnt->cl_prog;
 355         map->r_vers = clnt->cl_vers;
 356         map->r_prot = xprt->prot;
 357         map->r_port = 0;
 358         map->r_xprt = xprt_get(xprt);
 359         map->r_netid = rpc_peeraddr2str(clnt, RPC_DISPLAY_NETID);
 360         map->r_addr = rpc_peeraddr2str(rpcb_clnt, RPC_DISPLAY_UNIVERSAL_ADDR);
 361         map->r_owner = RPCB_OWNER_STRING;       /* ignored for GETADDR */
 362
 363         child = rpcb_call_async(rpcb_clnt, map, xprt->bind_index);
 364         rpc_release_client(rpcb_clnt);
 365         if (IS_ERR(child)) {
 366                 status = -EIO;
 367                 dprintk("RPC: %5u %s: rpc_run_task failed\n",
 368                         task->tk_pid, __FUNCTION__);
 369                 goto bailout;
 370         }
 371         rpc_put_task(child);
 372
 373         task->tk_xprt->stat.bind_count++;
 374         return;
 375
 376 bailout:
 377         kfree(map);
 378         xprt_put(xprt);
 379 bailout_nofree:
 380         rpcb_wake_rpcbind_waiters(xprt, status);
 381 bailout_nowake:
 382         task->tk_status = status;
 383 }
 384 EXPORT_SYMBOL_GPL(rpcb_getport_async);
 385
 386 /*
 387  * Rpcbind child task calls this callback via tk_exit.
 388  */
 389 static void rpcb_getport_done(struct rpc_task *child, void *data)
 390 {
 391         struct rpcbind_args *map = data;
 392         struct rpc_xprt *xprt = map->r_xprt;
 393         int status = child->tk_status;
 394
 395         /* Garbage reply: retry with a lesser rpcbind version */
 396         if (status == -EIO)
 397                 status = -EPROTONOSUPPORT;
 398
 399         /* rpcbind server doesn't support this rpcbind protocol version */
 400         if (status == -EPROTONOSUPPORT)
 401                 xprt->bind_index++;
 402
 403         if (status < 0) {
 404                 /* rpcbind server not available on remote host? */
 405                 xprt->ops->set_port(xprt, 0);
 406         } else if (map->r_port == 0) {
 407                 /* Requested RPC service wasn't registered on remote host */
 408                 xprt->ops->set_port(xprt, 0);
 409                 status = -EACCES;
 410         } else {
 411                 /* Succeeded */
 412                 xprt->ops->set_port(xprt, map->r_port);
 413                 xprt_set_bound(xprt);
 414                 status = 0;
 415         }
 416
 417         dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
 418                         child->tk_pid, status, map->r_port);
 419
 420         rpcb_wake_rpcbind_waiters(xprt, status);
 421 }
 422
 423 static int rpcb_encode_mapping(struct rpc_rqst *req, __be32 *p,
 424                                struct rpcbind_args *rpcb)
 425 {
 426         dprintk("RPC:       rpcb_encode_mapping(%u, %u, %d, %u)\n",
 427                         rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port);
 428         *p++ = htonl(rpcb->r_prog);
 429         *p++ = htonl(rpcb->r_vers);
 430         *p++ = htonl(rpcb->r_prot);
 431         *p++ = htonl(rpcb->r_port);
 432
 433         req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
 434         return 0;
 435 }
 436
 437 static int rpcb_decode_getport(struct rpc_rqst *req, __be32 *p,
 438                                unsigned short *portp)
 439 {
 440         *portp = (unsigned short) ntohl(*p++);
 441         dprintk("RPC:      rpcb_decode_getport result %u\n",
 442                         *portp);
 443         return 0;
 444 }
 445
 446 static int rpcb_decode_set(struct rpc_rqst *req, __be32 *p,
 447                            unsigned int *boolp)
 448 {
 449         *boolp = (unsigned int) ntohl(*p++);
 450         dprintk("RPC:      rpcb_decode_set result %u\n",
 451                         *boolp);
 452         return 0;
 453 }
 454
 455 static int rpcb_encode_getaddr(struct rpc_rqst *req, __be32 *p,
 456                                struct rpcbind_args *rpcb)
 457 {
 458         dprintk("RPC:       rpcb_encode_getaddr(%u, %u, %s)\n",
 459                         rpcb->r_prog, rpcb->r_vers, rpcb->r_addr);
 460         *p++ = htonl(rpcb->r_prog);
 461         *p++ = htonl(rpcb->r_vers);
 462
 463         p = xdr_encode_string(p, rpcb->r_netid);
 464         p = xdr_encode_string(p, rpcb->r_addr);
 465         p = xdr_encode_string(p, rpcb->r_owner);
 466
 467         req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
 468
 469         return 0;
 470 }
 471
 472 static int rpcb_decode_getaddr(struct rpc_rqst *req, __be32 *p,
 473                                unsigned short *portp)
 474 {
 475         char *addr;
 476         u32 addr_len;
 477         int c, i, f, first, val;
 478
 479         *portp = 0;
 480         addr_len = ntohl(*p++);
 481
 482         /*
 483          * Simple sanity check.  The smallest possible universal
 484          * address is an IPv4 address string containing 11 bytes.
 485          */
 486         if (addr_len < 11 || addr_len > RPCBIND_MAXUADDRLEN)
 487                 goto out_err;
 488
 489         /*
 490          * Start at the end and walk backwards until the first dot
 491          * is encountered.  When the second dot is found, we have
 492          * both parts of the port number.
 493          */
 494         addr = (char *)p;
 495         val = 0;
 496         first = 1;
 497         f = 1;
 498         for (i = addr_len - 1; i > 0; i--) {
 499                 c = addr[i];
 500                 if (c >= '0' && c <= '9') {
 501                         val += (c - '0') * f;
 502                         f *= 10;
 503                 } else if (c == '.') {
 504                         if (first) {
 505                                 *portp = val;
 506                                 val = first = 0;
 507                                 f = 1;
 508                         } else {
 509                                 *portp |= (val << 8);
 510                                 break;
 511                         }
 512                 }
 513         }
 514
 515         /*
 516          * Simple sanity check.  If we never saw a dot in the reply,
 517          * then this was probably just garbage.
 518          */
 519         if (first)
 520                 goto out_err;
 521
 522         dprintk("RPC:       rpcb_decode_getaddr port=%u\n", *portp);
 523         return 0;
 524
 525 out_err:
 526         dprintk("RPC:       rpcbind server returned malformed reply\n");
 527         return -EIO;
 528 }
 529
 530 #define RPCB_program_sz         (1u)
 531 #define RPCB_version_sz         (1u)
 532 #define RPCB_protocol_sz        (1u)
 533 #define RPCB_port_sz            (1u)
 534 #define RPCB_boolean_sz         (1u)
 535
 536 #define RPCB_netid_sz           (1+XDR_QUADLEN(RPCBIND_MAXNETIDLEN))
 537 #define RPCB_addr_sz            (1+XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 538 #define RPCB_ownerstring_sz     (1+XDR_QUADLEN(RPCB_MAXOWNERLEN))
 539
 540 #define RPCB_mappingargs_sz     RPCB_program_sz+RPCB_version_sz+        \
 541                                 RPCB_protocol_sz+RPCB_port_sz
 542 #define RPCB_getaddrargs_sz     RPCB_program_sz+RPCB_version_sz+        \
 543                                 RPCB_netid_sz+RPCB_addr_sz+             \
 544                                 RPCB_ownerstring_sz
 545
 546 #define RPCB_setres_sz          RPCB_boolean_sz
 547 #define RPCB_getportres_sz      RPCB_port_sz
 548
 549 /*
 550  * Note that RFC 1833 does not put any size restrictions on the
 551  * address string returned by the remote rpcbind database.
 552  */
 553 #define RPCB_getaddrres_sz      RPCB_addr_sz
 554
 555 #define PROC(proc, argtype, restype)                                    \
 556         [RPCBPROC_##proc] = {                                           \
 557                 .p_proc         = RPCBPROC_##proc,                      \
 558                 .p_encode       = (kxdrproc_t) rpcb_encode_##argtype,   \
 559                 .p_decode       = (kxdrproc_t) rpcb_decode_##restype,   \
 560                 .p_arglen       = RPCB_##argtype##args_sz,              \
 561                 .p_replen       = RPCB_##restype##res_sz,               \
 562                 .p_statidx      = RPCBPROC_##proc,                      \
 563                 .p_timer        = 0,                                    \
 564                 .p_name         = #proc,                                \
 565         }
 566
 567 /*
 568  * Not all rpcbind procedures described in RFC 1833 are implemented
 569  * since the Linux kernel RPC code requires only these.
 570  */
 571 static struct rpc_procinfo rpcb_procedures2[] = {
 572         PROC(SET,               mapping,        set),
 573         PROC(UNSET,             mapping,        set),
 574         PROC(GETADDR,           mapping,        getport),
 575 };
 576
 577 static struct rpc_procinfo rpcb_procedures3[] = {
 578         PROC(SET,               mapping,        set),
 579         PROC(UNSET,             mapping,        set),
 580         PROC(GETADDR,           getaddr,        getaddr),
 581 };
 582
 583 static struct rpc_procinfo rpcb_procedures4[] = {
 584         PROC(SET,               mapping,        set),
 585         PROC(UNSET,             mapping,        set),
 586         PROC(GETVERSADDR,       getaddr,        getaddr),
 587 };
 588
 589 static struct rpcb_info rpcb_next_version[] = {
 590 #ifdef CONFIG_SUNRPC_BIND34
 591         { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
 592         { 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
 593 #endif
 594         { 2, &rpcb_procedures2[RPCBPROC_GETPORT] },
 595         { 0, NULL },
 596 };
 597
 598 static struct rpcb_info rpcb_next_version6[] = {
 599 #ifdef CONFIG_SUNRPC_BIND34
 600         { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
 601         { 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
 602 #endif
 603         { 0, NULL },
 604 };
 605
 606 static struct rpc_version rpcb_version2 = {
 607         .number         = 2,
 608         .nrprocs        = RPCB_HIGHPROC_2,
 609         .procs          = rpcb_procedures2
 610 };
 611
 612 static struct rpc_version rpcb_version3 = {
 613         .number         = 3,
 614         .nrprocs        = RPCB_HIGHPROC_3,
 615         .procs          = rpcb_procedures3
 616 };
 617
 618 static struct rpc_version rpcb_version4 = {
 619         .number         = 4,
 620         .nrprocs        = RPCB_HIGHPROC_4,
 621         .procs          = rpcb_procedures4
 622 };
 623
 624 static struct rpc_version *rpcb_version[] = {
 625         NULL,
 626         NULL,
 627         &rpcb_version2,
 628         &rpcb_version3,
 629         &rpcb_version4
 630 };
 631
 632 static struct rpc_stat rpcb_stats;
 633
 634 static struct rpc_program rpcb_program = {
 635         .name           = "rpcbind",
 636         .number         = RPCBIND_PROGRAM,
 637         .nrvers         = ARRAY_SIZE(rpcb_version),
 638         .version        = rpcb_version,
 639         .stats          = &rpcb_stats,
 640 };