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 #define RPCBVERS_2              (2u)
  36 #define RPCBVERS_3              (3u)
  37 #define RPCBVERS_4              (4u)
  38
  39 enum {
  40         RPCBPROC_NULL,
  41         RPCBPROC_SET,
  42         RPCBPROC_UNSET,
  43         RPCBPROC_GETPORT,
  44         RPCBPROC_GETADDR = 3,           /* alias for GETPORT */
  45         RPCBPROC_DUMP,
  46         RPCBPROC_CALLIT,
  47         RPCBPROC_BCAST = 5,             /* alias for CALLIT */
  48         RPCBPROC_GETTIME,
  49         RPCBPROC_UADDR2TADDR,
  50         RPCBPROC_TADDR2UADDR,
  51         RPCBPROC_GETVERSADDR,
  52         RPCBPROC_INDIRECT,
  53         RPCBPROC_GETADDRLIST,
  54         RPCBPROC_GETSTAT,
  55 };
  56
  57 #define RPCB_HIGHPROC_2         RPCBPROC_CALLIT
  58 #define RPCB_HIGHPROC_3         RPCBPROC_TADDR2UADDR
  59 #define RPCB_HIGHPROC_4         RPCBPROC_GETSTAT
  60
  61 /*
  62  * r_owner
  63  *
  64  * The "owner" is allowed to unset a service in the rpcbind database.
  65  * We always use the following (arbitrary) fixed string.
  66  */
  67 #define RPCB_OWNER_STRING       "rpcb"
  68 #define RPCB_MAXOWNERLEN        sizeof(RPCB_OWNER_STRING)
  69
  70 static void                     rpcb_getport_done(struct rpc_task *, void *);
  71 static struct rpc_program       rpcb_program;
  72
  73 struct rpcbind_args {
  74         struct rpc_xprt *       r_xprt;
  75
  76         u32                     r_prog;
  77         u32                     r_vers;
  78         u32                     r_prot;
  79         unsigned short          r_port;
  80         const char *            r_netid;
  81         const char *            r_addr;
  82         const char *            r_owner;
  83 };
  84
  85 static struct rpc_procinfo rpcb_procedures2[];
  86 static struct rpc_procinfo rpcb_procedures3[];
  87
  88 struct rpcb_info {
  89         u32                     rpc_vers;
  90         struct rpc_procinfo *   rpc_proc;
  91 };
  92
  93 static struct rpcb_info rpcb_next_version[];
  94 static struct rpcb_info rpcb_next_version6[];
  95
  96 static void rpcb_map_release(void *data)
  97 {
  98         struct rpcbind_args *map = data;
  99
 100         xprt_put(map->r_xprt);
 101         kfree(map);
 102 }
 103
 104 static const struct rpc_call_ops rpcb_getport_ops = {
 105         .rpc_call_done          = rpcb_getport_done,
 106         .rpc_release            = rpcb_map_release,
 107 };
 108
 109 static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status)
 110 {
 111         xprt_clear_binding(xprt);
 112         rpc_wake_up_status(&xprt->binding, status);
 113 }
 114
 115 static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
 116                                     size_t salen, int proto, u32 version,
 117                                     int privileged)
 118 {
 119         struct rpc_create_args args = {
 120                 .protocol       = proto,
 121                 .address        = srvaddr,
 122                 .addrsize       = salen,
 123                 .servername     = hostname,
 124                 .program        = &rpcb_program,
 125                 .version        = version,
 126                 .authflavor     = RPC_AUTH_UNIX,
 127                 .flags          = RPC_CLNT_CREATE_NOPING,
 128         };
 129
 130         switch (srvaddr->sa_family) {
 131         case AF_INET:
 132                 ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
 133                 break;
 134         case AF_INET6:
 135                 ((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT);
 136                 break;
 137         default:
 138                 return NULL;
 139         }
 140
 141         if (!privileged)
 142                 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
 143         return rpc_create(&args);
 144 }
 145
 146 /**
 147  * rpcb_register - set or unset a port registration with the local rpcbind svc
 148  * @prog: RPC program number to bind
 149  * @vers: RPC version number to bind
 150  * @prot: transport protocol to use to make this request
 151  * @port: port value to register
 152  * @okay: result code
 153  *
 154  * port == 0 means unregister, port != 0 means register.
 155  *
 156  * This routine supports only rpcbind version 2.
 157  */
 158 int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
 159 {
 160         struct sockaddr_in sin = {
 161                 .sin_family             = AF_INET,
 162                 .sin_addr.s_addr        = htonl(INADDR_LOOPBACK),
 163         };
 164         struct rpcbind_args map = {
 165                 .r_prog         = prog,
 166                 .r_vers         = vers,
 167                 .r_prot         = prot,
 168                 .r_port         = port,
 169         };
 170         struct rpc_message msg = {
 171                 .rpc_proc       = &rpcb_procedures2[port ?
 172                                         RPCBPROC_SET : RPCBPROC_UNSET],
 173                 .rpc_argp       = &map,
 174                 .rpc_resp       = okay,
 175         };
 176         struct rpc_clnt *rpcb_clnt;
 177         int error = 0;
 178
 179         dprintk("RPC:       %sregistering (%u, %u, %d, %u) with local "
 180                         "rpcbind\n", (port ? "" : "un"),
 181                         prog, vers, prot, port);
 182
 183         rpcb_clnt = rpcb_create("localhost", (struct sockaddr *) &sin,
 184                                 sizeof(sin), XPRT_TRANSPORT_UDP, RPCBVERS_2, 1);
 185         if (IS_ERR(rpcb_clnt))
 186                 return PTR_ERR(rpcb_clnt);
 187
 188         error = rpc_call_sync(rpcb_clnt, &msg, 0);
 189
 190         rpc_shutdown_client(rpcb_clnt);
 191         if (error < 0)
 192                 printk(KERN_WARNING "RPC: failed to contact local rpcbind "
 193                                 "server (errno %d).\n", -error);
 194         dprintk("RPC:       registration status %d/%d\n", error, *okay);
 195
 196         return error;
 197 }
 198
 199 /**
 200  * rpcb_getport_sync - obtain the port for an RPC service on a given host
 201  * @sin: address of remote peer
 202  * @prog: RPC program number to bind
 203  * @vers: RPC version number to bind
 204  * @prot: transport protocol to use to make this request
 205  *
 206  * Return value is the requested advertised port number,
 207  * or a negative errno value.
 208  *
 209  * Called from outside the RPC client in a synchronous task context.
 210  * Uses default timeout parameters specified by underlying transport.
 211  *
 212  * XXX: Needs to support IPv6
 213  */
 214 int rpcb_getport_sync(struct sockaddr_in *sin, u32 prog, u32 vers, int prot)
 215 {
 216         struct rpcbind_args map = {
 217                 .r_prog         = prog,
 218                 .r_vers         = vers,
 219                 .r_prot         = prot,
 220                 .r_port         = 0,
 221         };
 222         struct rpc_message msg = {
 223                 .rpc_proc       = &rpcb_procedures2[RPCBPROC_GETPORT],
 224                 .rpc_argp       = &map,
 225                 .rpc_resp       = &map.r_port,
 226         };
 227         struct rpc_clnt *rpcb_clnt;
 228         int status;
 229
 230         dprintk("RPC:       %s(" NIPQUAD_FMT ", %u, %u, %d)\n",
 231                 __func__, NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
 232
 233         rpcb_clnt = rpcb_create(NULL, (struct sockaddr *)sin,
 234                                 sizeof(*sin), prot, RPCBVERS_2, 0);
 235         if (IS_ERR(rpcb_clnt))
 236                 return PTR_ERR(rpcb_clnt);
 237
 238         status = rpc_call_sync(rpcb_clnt, &msg, 0);
 239         rpc_shutdown_client(rpcb_clnt);
 240
 241         if (status >= 0) {
 242                 if (map.r_port != 0)
 243                         return map.r_port;
 244                 status = -EACCES;
 245         }
 246         return status;
 247 }
 248 EXPORT_SYMBOL_GPL(rpcb_getport_sync);
 249
 250 static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, struct rpcbind_args *map, struct rpc_procinfo *proc)
 251 {
 252         struct rpc_message msg = {
 253                 .rpc_proc = proc,
 254                 .rpc_argp = map,
 255                 .rpc_resp = &map->r_port,
 256         };
 257         struct rpc_task_setup task_setup_data = {
 258                 .rpc_client = rpcb_clnt,
 259                 .rpc_message = &msg,
 260                 .callback_ops = &rpcb_getport_ops,
 261                 .callback_data = map,
 262                 .flags = RPC_TASK_ASYNC,
 263         };
 264
 265         return rpc_run_task(&task_setup_data);
 266 }
 267
 268 /**
 269  * rpcb_getport_async - obtain the port for a given RPC service on a given host
 270  * @task: task that is waiting for portmapper request
 271  *
 272  * This one can be called for an ongoing RPC request, and can be used in
 273  * an async (rpciod) context.
 274  */
 275 void rpcb_getport_async(struct rpc_task *task)
 276 {
 277         struct rpc_clnt *clnt = task->tk_client;
 278         struct rpc_procinfo *proc;
 279         u32 bind_version;
 280         struct rpc_xprt *xprt = task->tk_xprt;
 281         struct rpc_clnt *rpcb_clnt;
 282         static struct rpcbind_args *map;
 283         struct rpc_task *child;
 284         struct sockaddr_storage addr;
 285         struct sockaddr *sap = (struct sockaddr *)&addr;
 286         size_t salen;
 287         int status;
 288
 289         dprintk("RPC: %5u %s(%s, %u, %u, %d)\n",
 290                 task->tk_pid, __func__,
 291                 clnt->cl_server, clnt->cl_prog, clnt->cl_vers, xprt->prot);
 292
 293         /* Autobind on cloned rpc clients is discouraged */
 294         BUG_ON(clnt->cl_parent != clnt);
 295
 296         if (xprt_test_and_set_binding(xprt)) {
 297                 status = -EAGAIN;       /* tell caller to check again */
 298                 dprintk("RPC: %5u %s: waiting for another binder\n",
 299                         task->tk_pid, __func__);
 300                 goto bailout_nowake;
 301         }
 302
 303         /* Put self on queue before sending rpcbind request, in case
 304          * rpcb_getport_done completes before we return from rpc_run_task */
 305         rpc_sleep_on(&xprt->binding, task, NULL);
 306
 307         /* Someone else may have bound if we slept */
 308         if (xprt_bound(xprt)) {
 309                 status = 0;
 310                 dprintk("RPC: %5u %s: already bound\n",
 311                         task->tk_pid, __func__);
 312                 goto bailout_nofree;
 313         }
 314
 315         salen = rpc_peeraddr(clnt, sap, sizeof(addr));
 316
 317         /* Don't ever use rpcbind v2 for AF_INET6 requests */
 318         switch (sap->sa_family) {
 319         case AF_INET:
 320                 proc = rpcb_next_version[xprt->bind_index].rpc_proc;
 321                 bind_version = rpcb_next_version[xprt->bind_index].rpc_vers;
 322                 break;
 323         case AF_INET6:
 324                 proc = rpcb_next_version6[xprt->bind_index].rpc_proc;
 325                 bind_version = rpcb_next_version6[xprt->bind_index].rpc_vers;
 326                 break;
 327         default:
 328                 status = -EAFNOSUPPORT;
 329                 dprintk("RPC: %5u %s: bad address family\n",
 330                                 task->tk_pid, __func__);
 331                 goto bailout_nofree;
 332         }
 333         if (proc == NULL) {
 334                 xprt->bind_index = 0;
 335                 status = -EPFNOSUPPORT;
 336                 dprintk("RPC: %5u %s: no more getport versions available\n",
 337                         task->tk_pid, __func__);
 338                 goto bailout_nofree;
 339         }
 340
 341         dprintk("RPC: %5u %s: trying rpcbind version %u\n",
 342                 task->tk_pid, __func__, bind_version);
 343
 344         rpcb_clnt = rpcb_create(clnt->cl_server, sap, salen, xprt->prot,
 345                                 bind_version, 0);
 346         if (IS_ERR(rpcb_clnt)) {
 347                 status = PTR_ERR(rpcb_clnt);
 348                 dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n",
 349                         task->tk_pid, __func__, PTR_ERR(rpcb_clnt));
 350                 goto bailout_nofree;
 351         }
 352
 353         map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC);
 354         if (!map) {
 355                 status = -ENOMEM;
 356                 dprintk("RPC: %5u %s: no memory available\n",
 357                         task->tk_pid, __func__);
 358                 goto bailout_nofree;
 359         }
 360         map->r_prog = clnt->cl_prog;
 361         map->r_vers = clnt->cl_vers;
 362         map->r_prot = xprt->prot;
 363         map->r_port = 0;
 364         map->r_xprt = xprt_get(xprt);
 365         map->r_netid = rpc_peeraddr2str(clnt, RPC_DISPLAY_NETID);
 366         map->r_addr = rpc_peeraddr2str(rpcb_clnt, RPC_DISPLAY_UNIVERSAL_ADDR);
 367         map->r_owner = RPCB_OWNER_STRING;       /* ignored for GETADDR */
 368
 369         child = rpcb_call_async(rpcb_clnt, map, proc);
 370         rpc_release_client(rpcb_clnt);
 371         if (IS_ERR(child)) {
 372                 status = -EIO;
 373                 /* rpcb_map_release() has freed the arguments */
 374                 dprintk("RPC: %5u %s: rpc_run_task failed\n",
 375                         task->tk_pid, __func__);
 376                 goto bailout_nofree;
 377         }
 378         rpc_put_task(child);
 379
 380         task->tk_xprt->stat.bind_count++;
 381         return;
 382
 383 bailout_nofree:
 384         rpcb_wake_rpcbind_waiters(xprt, status);
 385 bailout_nowake:
 386         task->tk_status = status;
 387 }
 388 EXPORT_SYMBOL_GPL(rpcb_getport_async);
 389
 390 /*
 391  * Rpcbind child task calls this callback via tk_exit.
 392  */
 393 static void rpcb_getport_done(struct rpc_task *child, void *data)
 394 {
 395         struct rpcbind_args *map = data;
 396         struct rpc_xprt *xprt = map->r_xprt;
 397         int status = child->tk_status;
 398
 399         /* Garbage reply: retry with a lesser rpcbind version */
 400         if (status == -EIO)
 401                 status = -EPROTONOSUPPORT;
 402
 403         /* rpcbind server doesn't support this rpcbind protocol version */
 404         if (status == -EPROTONOSUPPORT)
 405                 xprt->bind_index++;
 406
 407         if (status < 0) {
 408                 /* rpcbind server not available on remote host? */
 409                 xprt->ops->set_port(xprt, 0);
 410         } else if (map->r_port == 0) {
 411                 /* Requested RPC service wasn't registered on remote host */
 412                 xprt->ops->set_port(xprt, 0);
 413                 status = -EACCES;
 414         } else {
 415                 /* Succeeded */
 416                 xprt->ops->set_port(xprt, map->r_port);
 417                 xprt_set_bound(xprt);
 418                 status = 0;
 419         }
 420
 421         dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
 422                         child->tk_pid, status, map->r_port);
 423
 424         rpcb_wake_rpcbind_waiters(xprt, status);
 425 }
 426
 427 static int rpcb_encode_mapping(struct rpc_rqst *req, __be32 *p,
 428                                struct rpcbind_args *rpcb)
 429 {
 430         dprintk("RPC:       rpcb_encode_mapping(%u, %u, %d, %u)\n",
 431                         rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port);
 432         *p++ = htonl(rpcb->r_prog);
 433         *p++ = htonl(rpcb->r_vers);
 434         *p++ = htonl(rpcb->r_prot);
 435         *p++ = htonl(rpcb->r_port);
 436
 437         req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
 438         return 0;
 439 }
 440
 441 static int rpcb_decode_getport(struct rpc_rqst *req, __be32 *p,
 442                                unsigned short *portp)
 443 {
 444         *portp = (unsigned short) ntohl(*p++);
 445         dprintk("RPC:       rpcb_decode_getport result %u\n",
 446                         *portp);
 447         return 0;
 448 }
 449
 450 static int rpcb_decode_set(struct rpc_rqst *req, __be32 *p,
 451                            unsigned int *boolp)
 452 {
 453         *boolp = (unsigned int) ntohl(*p++);
 454         dprintk("RPC:       rpcb_decode_set: call %s\n",
 455                         (*boolp ? "succeeded" : "failed"));
 456         return 0;
 457 }
 458
 459 static int rpcb_encode_getaddr(struct rpc_rqst *req, __be32 *p,
 460                                struct rpcbind_args *rpcb)
 461 {
 462         dprintk("RPC:       rpcb_encode_getaddr(%u, %u, %s)\n",
 463                         rpcb->r_prog, rpcb->r_vers, rpcb->r_addr);
 464         *p++ = htonl(rpcb->r_prog);
 465         *p++ = htonl(rpcb->r_vers);
 466
 467         p = xdr_encode_string(p, rpcb->r_netid);
 468         p = xdr_encode_string(p, rpcb->r_addr);
 469         p = xdr_encode_string(p, rpcb->r_owner);
 470
 471         req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
 472
 473         return 0;
 474 }
 475
 476 static int rpcb_decode_getaddr(struct rpc_rqst *req, __be32 *p,
 477                                unsigned short *portp)
 478 {
 479         char *addr;
 480         u32 addr_len;
 481         int c, i, f, first, val;
 482
 483         *portp = 0;
 484         addr_len = ntohl(*p++);
 485
 486         /*
 487          * Simple sanity check.  The smallest possible universal
 488          * address is an IPv4 address string containing 11 bytes.
 489          */
 490         if (addr_len < 11 || addr_len > RPCBIND_MAXUADDRLEN)
 491                 goto out_err;
 492
 493         /*
 494          * Start at the end and walk backwards until the first dot
 495          * is encountered.  When the second dot is found, we have
 496          * both parts of the port number.
 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         /*
 520          * Simple sanity check.  If we never saw a dot in the reply,
 521          * then this was probably just garbage.
 522          */
 523         if (first)
 524                 goto out_err;
 525
 526         dprintk("RPC:       rpcb_decode_getaddr port=%u\n", *portp);
 527         return 0;
 528
 529 out_err:
 530         dprintk("RPC:       rpcbind server returned malformed reply\n");
 531         return -EIO;
 532 }
 533
 534 #define RPCB_program_sz         (1u)
 535 #define RPCB_version_sz         (1u)
 536 #define RPCB_protocol_sz        (1u)
 537 #define RPCB_port_sz            (1u)
 538 #define RPCB_boolean_sz         (1u)
 539
 540 #define RPCB_netid_sz           (1+XDR_QUADLEN(RPCBIND_MAXNETIDLEN))
 541 #define RPCB_addr_sz            (1+XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 542 #define RPCB_ownerstring_sz     (1+XDR_QUADLEN(RPCB_MAXOWNERLEN))
 543
 544 #define RPCB_mappingargs_sz     RPCB_program_sz+RPCB_version_sz+        \
 545                                 RPCB_protocol_sz+RPCB_port_sz
 546 #define RPCB_getaddrargs_sz     RPCB_program_sz+RPCB_version_sz+        \
 547                                 RPCB_netid_sz+RPCB_addr_sz+             \
 548                                 RPCB_ownerstring_sz
 549
 550 #define RPCB_setres_sz          RPCB_boolean_sz
 551 #define RPCB_getportres_sz      RPCB_port_sz
 552
 553 /*
 554  * Note that RFC 1833 does not put any size restrictions on the
 555  * address string returned by the remote rpcbind database.
 556  */
 557 #define RPCB_getaddrres_sz      RPCB_addr_sz
 558
 559 #define PROC(proc, argtype, restype)                                    \
 560         [RPCBPROC_##proc] = {                                           \
 561                 .p_proc         = RPCBPROC_##proc,                      \
 562                 .p_encode       = (kxdrproc_t) rpcb_encode_##argtype,   \
 563                 .p_decode       = (kxdrproc_t) rpcb_decode_##restype,   \
 564                 .p_arglen       = RPCB_##argtype##args_sz,              \
 565                 .p_replen       = RPCB_##restype##res_sz,               \
 566                 .p_statidx      = RPCBPROC_##proc,                      \
 567                 .p_timer        = 0,                                    \
 568                 .p_name         = #proc,                                \
 569         }
 570
 571 /*
 572  * Not all rpcbind procedures described in RFC 1833 are implemented
 573  * since the Linux kernel RPC code requires only these.
 574  */
 575 static struct rpc_procinfo rpcb_procedures2[] = {
 576         PROC(SET,               mapping,        set),
 577         PROC(UNSET,             mapping,        set),
 578         PROC(GETPORT,           mapping,        getport),
 579 };
 580
 581 static struct rpc_procinfo rpcb_procedures3[] = {
 582         PROC(SET,               mapping,        set),
 583         PROC(UNSET,             mapping,        set),
 584         PROC(GETADDR,           getaddr,        getaddr),
 585 };
 586
 587 static struct rpc_procinfo rpcb_procedures4[] = {
 588         PROC(SET,               mapping,        set),
 589         PROC(UNSET,             mapping,        set),
 590         PROC(GETADDR,           getaddr,        getaddr),
 591         PROC(GETVERSADDR,       getaddr,        getaddr),
 592 };
 593
 594 static struct rpcb_info rpcb_next_version[] = {
 595 #ifdef CONFIG_SUNRPC_BIND34
 596         {
 597                 .rpc_vers       = RPCBVERS_4,
 598                 .rpc_proc       = &rpcb_procedures4[RPCBPROC_GETADDR],
 599         },
 600         {
 601                 .rpc_vers       = RPCBVERS_3,
 602                 .rpc_proc       = &rpcb_procedures3[RPCBPROC_GETADDR],
 603         },
 604 #endif
 605         {
 606                 .rpc_vers       = RPCBVERS_2,
 607                 .rpc_proc       = &rpcb_procedures2[RPCBPROC_GETPORT],
 608         },
 609         {
 610                 .rpc_proc       = NULL,
 611         },
 612 };
 613
 614 static struct rpcb_info rpcb_next_version6[] = {
 615 #ifdef CONFIG_SUNRPC_BIND34
 616         {
 617                 .rpc_vers       = RPCBVERS_4,
 618                 .rpc_proc       = &rpcb_procedures4[RPCBPROC_GETADDR],
 619         },
 620         {
 621                 .rpc_vers       = RPCBVERS_3,
 622                 .rpc_proc       = &rpcb_procedures3[RPCBPROC_GETADDR],
 623         },
 624 #endif
 625         {
 626                 .rpc_proc       = NULL,
 627         },
 628 };
 629
 630 static struct rpc_version rpcb_version2 = {
 631         .number         = RPCBVERS_2,
 632         .nrprocs        = RPCB_HIGHPROC_2,
 633         .procs          = rpcb_procedures2
 634 };
 635
 636 static struct rpc_version rpcb_version3 = {
 637         .number         = RPCBVERS_3,
 638         .nrprocs        = RPCB_HIGHPROC_3,
 639         .procs          = rpcb_procedures3
 640 };
 641
 642 static struct rpc_version rpcb_version4 = {
 643         .number         = RPCBVERS_4,
 644         .nrprocs        = RPCB_HIGHPROC_4,
 645         .procs          = rpcb_procedures4
 646 };
 647
 648 static struct rpc_version *rpcb_version[] = {
 649         NULL,
 650         NULL,
 651         &rpcb_version2,
 652         &rpcb_version3,
 653         &rpcb_version4
 654 };
 655
 656 static struct rpc_stat rpcb_stats;
 657
 658 static struct rpc_program rpcb_program = {
 659         .name           = "rpcbind",
 660         .number         = RPCBIND_PROGRAM,
 661         .nrvers         = ARRAY_SIZE(rpcb_version),
 662         .version        = rpcb_version,
 663         .stats          = &rpcb_stats,
 664 };