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
  27 #ifdef RPC_DEBUG
  28 # define RPCDBG_FACILITY        RPCDBG_BIND
  29 #endif
  30
  31 #define RPCBIND_PROGRAM         (100000u)
  32 #define RPCBIND_PORT            (111u)
  33
  34 enum {
  35         RPCBPROC_NULL,
  36         RPCBPROC_SET,
  37         RPCBPROC_UNSET,
  38         RPCBPROC_GETPORT,
  39         RPCBPROC_GETADDR = 3,           /* alias for GETPORT */
  40         RPCBPROC_DUMP,
  41         RPCBPROC_CALLIT,
  42         RPCBPROC_BCAST = 5,             /* alias for CALLIT */
  43         RPCBPROC_GETTIME,
  44         RPCBPROC_UADDR2TADDR,
  45         RPCBPROC_TADDR2UADDR,
  46         RPCBPROC_GETVERSADDR,
  47         RPCBPROC_INDIRECT,
  48         RPCBPROC_GETADDRLIST,
  49         RPCBPROC_GETSTAT,
  50 };
  51
  52 #define RPCB_HIGHPROC_2         RPCBPROC_CALLIT
  53 #define RPCB_HIGHPROC_3         RPCBPROC_TADDR2UADDR
  54 #define RPCB_HIGHPROC_4         RPCBPROC_GETSTAT
  55
  56 /*
  57  * r_addr
  58  *
  59  * Quoting RFC 3530, section 2.2:
  60  *
  61  * For TCP over IPv4 and for UDP over IPv4, the format of r_addr is the
  62  * US-ASCII string:
  63  *
  64  *      h1.h2.h3.h4.p1.p2
  65  *
  66  * The prefix, "h1.h2.h3.h4", is the standard textual form for
  67  * representing an IPv4 address, which is always four octets long.
  68  * Assuming big-endian ordering, h1, h2, h3, and h4, are respectively,
  69  * the first through fourth octets each converted to ASCII-decimal.
  70  * Assuming big-endian ordering, p1 and p2 are, respectively, the first
  71  * and second octets each converted to ASCII-decimal.  For example, if a
  72  * host, in big-endian order, has an address of 0x0A010307 and there is
  73  * a service listening on, in big endian order, port 0x020F (decimal
  74  * 527), then the complete universal address is "10.1.3.7.2.15".
  75  *
  76  * ...
  77  *
  78  * For TCP over IPv6 and for UDP over IPv6, the format of r_addr is the
  79  * US-ASCII string:
  80  *
  81  *      x1:x2:x3:x4:x5:x6:x7:x8.p1.p2
  82  *
  83  * The suffix "p1.p2" is the service port, and is computed the same way
  84  * as with universal addresses for TCP and UDP over IPv4.  The prefix,
  85  * "x1:x2:x3:x4:x5:x6:x7:x8", is the standard textual form for
  86  * representing an IPv6 address as defined in Section 2.2 of [RFC2373].
  87  * Additionally, the two alternative forms specified in Section 2.2 of
  88  * [RFC2373] are also acceptable.
  89  *
  90  * XXX: Currently this implementation does not explicitly convert the
  91  *      stored address to US-ASCII on non-ASCII systems.
  92  */
  93 #define RPCB_MAXADDRLEN         (128u)
  94
  95 /*
  96  * r_owner
  97  *
  98  * The "owner" is allowed to unset a service in the rpcbind database.
  99  * We always use the following (arbitrary) fixed string.
 100  */
 101 #define RPCB_OWNER_STRING       "rpcb"
 102 #define RPCB_MAXOWNERLEN        sizeof(RPCB_OWNER_STRING)
 103
 104 static void                     rpcb_getport_done(struct rpc_task *, void *);
 105 extern struct rpc_program       rpcb_program;
 106
 107 struct rpcbind_args {
 108         struct rpc_xprt *       r_xprt;
 109
 110         u32                     r_prog;
 111         u32                     r_vers;
 112         u32                     r_prot;
 113         unsigned short          r_port;
 114         char *                  r_netid;
 115         char                    r_addr[RPCB_MAXADDRLEN];
 116         char *                  r_owner;
 117 };
 118
 119 static struct rpc_procinfo rpcb_procedures2[];
 120 static struct rpc_procinfo rpcb_procedures3[];
 121
 122 struct rpcb_info {
 123         int                     rpc_vers;
 124         struct rpc_procinfo *   rpc_proc;
 125 };
 126
 127 static struct rpcb_info rpcb_next_version[];
 128 static struct rpcb_info rpcb_next_version6[];
 129
 130 static void rpcb_getport_prepare(struct rpc_task *task, void *calldata)
 131 {
 132         struct rpcbind_args *map = calldata;
 133         struct rpc_xprt *xprt = map->r_xprt;
 134         struct rpc_message msg = {
 135                 .rpc_proc       = rpcb_next_version[xprt->bind_index].rpc_proc,
 136                 .rpc_argp       = map,
 137                 .rpc_resp       = &map->r_port,
 138         };
 139
 140         rpc_call_setup(task, &msg, 0);
 141 }
 142
 143 static void rpcb_map_release(void *data)
 144 {
 145         struct rpcbind_args *map = data;
 146
 147         xprt_put(map->r_xprt);
 148         kfree(map);
 149 }
 150
 151 static const struct rpc_call_ops rpcb_getport_ops = {
 152         .rpc_call_prepare       = rpcb_getport_prepare,
 153         .rpc_call_done          = rpcb_getport_done,
 154         .rpc_release            = rpcb_map_release,
 155 };
 156
 157 static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status)
 158 {
 159         xprt_clear_binding(xprt);
 160         rpc_wake_up_status(&xprt->binding, status);
 161 }
 162
 163 static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
 164                                         int proto, int version, int privileged)
 165 {
 166         struct rpc_create_args args = {
 167                 .protocol       = proto,
 168                 .address        = srvaddr,
 169                 .addrsize       = sizeof(struct sockaddr_in),
 170                 .servername     = hostname,
 171                 .program        = &rpcb_program,
 172                 .version        = version,
 173                 .authflavor     = RPC_AUTH_UNIX,
 174                 .flags          = (RPC_CLNT_CREATE_NOPING |
 175                                    RPC_CLNT_CREATE_INTR),
 176         };
 177
 178         switch (srvaddr->sa_family) {
 179         case AF_INET:
 180                 ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
 181                 break;
 182         case AF_INET6:
 183                 ((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT);
 184                 break;
 185         default:
 186                 return NULL;
 187         }
 188
 189         if (!privileged)
 190                 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
 191         return rpc_create(&args);
 192 }
 193
 194 /**
 195  * rpcb_register - set or unset a port registration with the local rpcbind svc
 196  * @prog: RPC program number to bind
 197  * @vers: RPC version number to bind
 198  * @prot: transport protocol to use to make this request
 199  * @port: port value to register
 200  * @okay: result code
 201  *
 202  * port == 0 means unregister, port != 0 means register.
 203  *
 204  * This routine supports only rpcbind version 2.
 205  */
 206 int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
 207 {
 208         struct sockaddr_in sin = {
 209                 .sin_family             = AF_INET,
 210                 .sin_addr.s_addr        = htonl(INADDR_LOOPBACK),
 211         };
 212         struct rpcbind_args map = {
 213                 .r_prog         = prog,
 214                 .r_vers         = vers,
 215                 .r_prot         = prot,
 216                 .r_port         = port,
 217         };
 218         struct rpc_message msg = {
 219                 .rpc_proc       = &rpcb_procedures2[port ?
 220                                         RPCBPROC_SET : RPCBPROC_UNSET],
 221                 .rpc_argp       = &map,
 222                 .rpc_resp       = okay,
 223         };
 224         struct rpc_clnt *rpcb_clnt;
 225         int error = 0;
 226
 227         dprintk("RPC:       %sregistering (%u, %u, %d, %u) with local "
 228                         "rpcbind\n", (port ? "" : "un"),
 229                         prog, vers, prot, port);
 230
 231         rpcb_clnt = rpcb_create("localhost", (struct sockaddr *) &sin,
 232                                         IPPROTO_UDP, 2, 1);
 233         if (IS_ERR(rpcb_clnt))
 234                 return PTR_ERR(rpcb_clnt);
 235
 236         error = rpc_call_sync(rpcb_clnt, &msg, 0);
 237
 238         rpc_shutdown_client(rpcb_clnt);
 239         if (error < 0)
 240                 printk(KERN_WARNING "RPC: failed to contact local rpcbind "
 241                                 "server (errno %d).\n", -error);
 242         dprintk("RPC:       registration status %d/%d\n", error, *okay);
 243
 244         return error;
 245 }
 246
 247 /**
 248  * rpcb_getport_sync - obtain the port for an RPC service on a given host
 249  * @sin: address of remote peer
 250  * @prog: RPC program number to bind
 251  * @vers: RPC version number to bind
 252  * @prot: transport protocol to use to make this request
 253  *
 254  * Called from outside the RPC client in a synchronous task context.
 255  * Uses default timeout parameters specified by underlying transport.
 256  *
 257  * XXX: Needs to support IPv6, and rpcbind versions 3 and 4
 258  */
 259 int rpcb_getport_sync(struct sockaddr_in *sin, __u32 prog,
 260                       __u32 vers, int prot)
 261 {
 262         struct rpcbind_args map = {
 263                 .r_prog         = prog,
 264                 .r_vers         = vers,
 265                 .r_prot         = prot,
 266                 .r_port         = 0,
 267         };
 268         struct rpc_message msg = {
 269                 .rpc_proc       = &rpcb_procedures2[RPCBPROC_GETPORT],
 270                 .rpc_argp       = &map,
 271                 .rpc_resp       = &map.r_port,
 272         };
 273         struct rpc_clnt *rpcb_clnt;
 274         char hostname[40];
 275         int status;
 276
 277         dprintk("RPC:       %s(" NIPQUAD_FMT ", %u, %u, %d)\n",
 278                 __FUNCTION__, NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
 279
 280         sprintf(hostname, NIPQUAD_FMT, NIPQUAD(sin->sin_addr.s_addr));
 281         rpcb_clnt = rpcb_create(hostname, (struct sockaddr *)sin, prot, 2, 0);
 282         if (IS_ERR(rpcb_clnt))
 283                 return PTR_ERR(rpcb_clnt);
 284
 285         status = rpc_call_sync(rpcb_clnt, &msg, 0);
 286         rpc_shutdown_client(rpcb_clnt);
 287
 288         if (status >= 0) {
 289                 if (map.r_port != 0)
 290                         return map.r_port;
 291                 status = -EACCES;
 292         }
 293         return status;
 294 }
 295 EXPORT_SYMBOL_GPL(rpcb_getport_sync);
 296
 297 /**
 298  * rpcb_getport_async - obtain the port for a given RPC service on a given host
 299  * @task: task that is waiting for portmapper request
 300  *
 301  * This one can be called for an ongoing RPC request, and can be used in
 302  * an async (rpciod) context.
 303  */
 304 void rpcb_getport_async(struct rpc_task *task)
 305 {
 306         struct rpc_clnt *clnt = task->tk_client;
 307         int bind_version;
 308         struct rpc_xprt *xprt = task->tk_xprt;
 309         struct rpc_clnt *rpcb_clnt;
 310         static struct rpcbind_args *map;
 311         struct rpc_task *child;
 312         struct sockaddr addr;
 313         int status;
 314         struct rpcb_info *info;
 315
 316         dprintk("RPC: %5u %s(%s, %u, %u, %d)\n",
 317                 task->tk_pid, __FUNCTION__,
 318                 clnt->cl_server, clnt->cl_prog, clnt->cl_vers, xprt->prot);
 319
 320         /* Autobind on cloned rpc clients is discouraged */
 321         BUG_ON(clnt->cl_parent != clnt);
 322
 323         if (xprt_test_and_set_binding(xprt)) {
 324                 status = -EAGAIN;       /* tell caller to check again */
 325                 dprintk("RPC: %5u %s: waiting for another binder\n",
 326                         task->tk_pid, __FUNCTION__);
 327                 goto bailout_nowake;
 328         }
 329
 330         /* Put self on queue before sending rpcbind request, in case
 331          * rpcb_getport_done completes before we return from rpc_run_task */
 332         rpc_sleep_on(&xprt->binding, task, NULL, NULL);
 333
 334         /* Someone else may have bound if we slept */
 335         if (xprt_bound(xprt)) {
 336                 status = 0;
 337                 dprintk("RPC: %5u %s: already bound\n",
 338                         task->tk_pid, __FUNCTION__);
 339                 goto bailout_nofree;
 340         }
 341
 342         rpc_peeraddr(clnt, (void *)&addr, sizeof(addr));
 343
 344         /* Don't ever use rpcbind v2 for AF_INET6 requests */
 345         switch (addr.sa_family) {
 346         case AF_INET:
 347                 info = rpcb_next_version;
 348                 break;
 349         case AF_INET6:
 350                 info = rpcb_next_version6;
 351                 break;
 352         default:
 353                 status = -EAFNOSUPPORT;
 354                 dprintk("RPC: %5u %s: bad address family\n",
 355                                 task->tk_pid, __FUNCTION__);
 356                 goto bailout_nofree;
 357         }
 358         if (info[xprt->bind_index].rpc_proc == NULL) {
 359                 xprt->bind_index = 0;
 360                 status = -EPFNOSUPPORT;
 361                 dprintk("RPC: %5u %s: no more getport versions available\n",
 362                         task->tk_pid, __FUNCTION__);
 363                 goto bailout_nofree;
 364         }
 365         bind_version = info[xprt->bind_index].rpc_vers;
 366
 367         dprintk("RPC: %5u %s: trying rpcbind version %u\n",
 368                 task->tk_pid, __FUNCTION__, bind_version);
 369
 370         rpcb_clnt = rpcb_create(clnt->cl_server, &addr, xprt->prot,
 371                                 bind_version, 0);
 372         if (IS_ERR(rpcb_clnt)) {
 373                 status = PTR_ERR(rpcb_clnt);
 374                 dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n",
 375                         task->tk_pid, __FUNCTION__, PTR_ERR(rpcb_clnt));
 376                 goto bailout_nofree;
 377         }
 378
 379         map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC);
 380         if (!map) {
 381                 status = -ENOMEM;
 382                 dprintk("RPC: %5u %s: no memory available\n",
 383                         task->tk_pid, __FUNCTION__);
 384                 goto bailout_nofree;
 385         }
 386         map->r_prog = clnt->cl_prog;
 387         map->r_vers = clnt->cl_vers;
 388         map->r_prot = xprt->prot;
 389         map->r_port = 0;
 390         map->r_xprt = xprt_get(xprt);
 391         map->r_netid = (xprt->prot == IPPROTO_TCP) ? RPCBIND_NETID_TCP :
 392                                                      RPCBIND_NETID_UDP;
 393         memcpy(map->r_addr,
 394                rpc_peeraddr2str(rpcb_clnt, RPC_DISPLAY_UNIVERSAL_ADDR),
 395                sizeof(map->r_addr));
 396         map->r_owner = RPCB_OWNER_STRING;       /* ignored for GETADDR */
 397
 398         child = rpc_run_task(rpcb_clnt, RPC_TASK_ASYNC, &rpcb_getport_ops, map);
 399         rpc_release_client(rpcb_clnt);
 400         if (IS_ERR(child)) {
 401                 status = -EIO;
 402                 dprintk("RPC: %5u %s: rpc_run_task failed\n",
 403                         task->tk_pid, __FUNCTION__);
 404                 goto bailout;
 405         }
 406         rpc_put_task(child);
 407
 408         task->tk_xprt->stat.bind_count++;
 409         return;
 410
 411 bailout:
 412         kfree(map);
 413         xprt_put(xprt);
 414 bailout_nofree:
 415         rpcb_wake_rpcbind_waiters(xprt, status);
 416 bailout_nowake:
 417         task->tk_status = status;
 418 }
 419
 420 /*
 421  * Rpcbind child task calls this callback via tk_exit.
 422  */
 423 static void rpcb_getport_done(struct rpc_task *child, void *data)
 424 {
 425         struct rpcbind_args *map = data;
 426         struct rpc_xprt *xprt = map->r_xprt;
 427         int status = child->tk_status;
 428
 429         /* Garbage reply: retry with a lesser rpcbind version */
 430         if (status == -EIO)
 431                 status = -EPROTONOSUPPORT;
 432
 433         /* rpcbind server doesn't support this rpcbind protocol version */
 434         if (status == -EPROTONOSUPPORT)
 435                 xprt->bind_index++;
 436
 437         if (status < 0) {
 438                 /* rpcbind server not available on remote host? */
 439                 xprt->ops->set_port(xprt, 0);
 440         } else if (map->r_port == 0) {
 441                 /* Requested RPC service wasn't registered on remote host */
 442                 xprt->ops->set_port(xprt, 0);
 443                 status = -EACCES;
 444         } else {
 445                 /* Succeeded */
 446                 xprt->ops->set_port(xprt, map->r_port);
 447                 xprt_set_bound(xprt);
 448                 status = 0;
 449         }
 450
 451         dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
 452                         child->tk_pid, status, map->r_port);
 453
 454         rpcb_wake_rpcbind_waiters(xprt, status);
 455 }
 456
 457 static int rpcb_encode_mapping(struct rpc_rqst *req, __be32 *p,
 458                                struct rpcbind_args *rpcb)
 459 {
 460         dprintk("RPC:       rpcb_encode_mapping(%u, %u, %d, %u)\n",
 461                         rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port);
 462         *p++ = htonl(rpcb->r_prog);
 463         *p++ = htonl(rpcb->r_vers);
 464         *p++ = htonl(rpcb->r_prot);
 465         *p++ = htonl(rpcb->r_port);
 466
 467         req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
 468         return 0;
 469 }
 470
 471 static int rpcb_decode_getport(struct rpc_rqst *req, __be32 *p,
 472                                unsigned short *portp)
 473 {
 474         *portp = (unsigned short) ntohl(*p++);
 475         dprintk("RPC:      rpcb_decode_getport result %u\n",
 476                         *portp);
 477         return 0;
 478 }
 479
 480 static int rpcb_decode_set(struct rpc_rqst *req, __be32 *p,
 481                            unsigned int *boolp)
 482 {
 483         *boolp = (unsigned int) ntohl(*p++);
 484         dprintk("RPC:      rpcb_decode_set result %u\n",
 485                         *boolp);
 486         return 0;
 487 }
 488
 489 static int rpcb_encode_getaddr(struct rpc_rqst *req, __be32 *p,
 490                                struct rpcbind_args *rpcb)
 491 {
 492         dprintk("RPC:       rpcb_encode_getaddr(%u, %u, %s)\n",
 493                         rpcb->r_prog, rpcb->r_vers, rpcb->r_addr);
 494         *p++ = htonl(rpcb->r_prog);
 495         *p++ = htonl(rpcb->r_vers);
 496
 497         p = xdr_encode_string(p, rpcb->r_netid);
 498         p = xdr_encode_string(p, rpcb->r_addr);
 499         p = xdr_encode_string(p, rpcb->r_owner);
 500
 501         req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
 502
 503         return 0;
 504 }
 505
 506 static int rpcb_decode_getaddr(struct rpc_rqst *req, __be32 *p,
 507                                unsigned short *portp)
 508 {
 509         char *addr;
 510         u32 addr_len;
 511         int c, i, f, first, val;
 512
 513         *portp = 0;
 514         addr_len = ntohl(*p++);
 515
 516         /*
 517          * Simple sanity check.  The smallest possible universal
 518          * address is an IPv4 address string containing 11 bytes.
 519          */
 520         if (addr_len < 11 || addr_len > RPCB_MAXADDRLEN)
 521                 goto out_err;
 522
 523         /*
 524          * Start at the end and walk backwards until the first dot
 525          * is encountered.  When the second dot is found, we have
 526          * both parts of the port number.
 527          */
 528         addr = (char *)p;
 529         val = 0;
 530         first = 1;
 531         f = 1;
 532         for (i = addr_len - 1; i > 0; i--) {
 533                 c = addr[i];
 534                 if (c >= '0' && c <= '9') {
 535                         val += (c - '0') * f;
 536                         f *= 10;
 537                 } else if (c == '.') {
 538                         if (first) {
 539                                 *portp = val;
 540                                 val = first = 0;
 541                                 f = 1;
 542                         } else {
 543                                 *portp |= (val << 8);
 544                                 break;
 545                         }
 546                 }
 547         }
 548
 549         /*
 550          * Simple sanity check.  If we never saw a dot in the reply,
 551          * then this was probably just garbage.
 552          */
 553         if (first)
 554                 goto out_err;
 555
 556         dprintk("RPC:       rpcb_decode_getaddr port=%u\n", *portp);
 557         return 0;
 558
 559 out_err:
 560         dprintk("RPC:       rpcbind server returned malformed reply\n");
 561         return -EIO;
 562 }
 563
 564 #define RPCB_program_sz         (1u)
 565 #define RPCB_version_sz         (1u)
 566 #define RPCB_protocol_sz        (1u)
 567 #define RPCB_port_sz            (1u)
 568 #define RPCB_boolean_sz         (1u)
 569
 570 #define RPCB_netid_sz           (1+XDR_QUADLEN(RPCBIND_MAXNETIDLEN))
 571 #define RPCB_addr_sz            (1+XDR_QUADLEN(RPCB_MAXADDRLEN))
 572 #define RPCB_ownerstring_sz     (1+XDR_QUADLEN(RPCB_MAXOWNERLEN))
 573
 574 #define RPCB_mappingargs_sz     RPCB_program_sz+RPCB_version_sz+        \
 575                                 RPCB_protocol_sz+RPCB_port_sz
 576 #define RPCB_getaddrargs_sz     RPCB_program_sz+RPCB_version_sz+        \
 577                                 RPCB_netid_sz+RPCB_addr_sz+             \
 578                                 RPCB_ownerstring_sz
 579
 580 #define RPCB_setres_sz          RPCB_boolean_sz
 581 #define RPCB_getportres_sz      RPCB_port_sz
 582
 583 /*
 584  * Note that RFC 1833 does not put any size restrictions on the
 585  * address string returned by the remote rpcbind database.
 586  */
 587 #define RPCB_getaddrres_sz      RPCB_addr_sz
 588
 589 #define PROC(proc, argtype, restype)                                    \
 590         [RPCBPROC_##proc] = {                                           \
 591                 .p_proc         = RPCBPROC_##proc,                      \
 592                 .p_encode       = (kxdrproc_t) rpcb_encode_##argtype,   \
 593                 .p_decode       = (kxdrproc_t) rpcb_decode_##restype,   \
 594                 .p_arglen       = RPCB_##argtype##args_sz,              \
 595                 .p_replen       = RPCB_##restype##res_sz,               \
 596                 .p_statidx      = RPCBPROC_##proc,                      \
 597                 .p_timer        = 0,                                    \
 598                 .p_name         = #proc,                                \
 599         }
 600
 601 /*
 602  * Not all rpcbind procedures described in RFC 1833 are implemented
 603  * since the Linux kernel RPC code requires only these.
 604  */
 605 static struct rpc_procinfo rpcb_procedures2[] = {
 606         PROC(SET,               mapping,        set),
 607         PROC(UNSET,             mapping,        set),
 608         PROC(GETADDR,           mapping,        getport),
 609 };
 610
 611 static struct rpc_procinfo rpcb_procedures3[] = {
 612         PROC(SET,               mapping,        set),
 613         PROC(UNSET,             mapping,        set),
 614         PROC(GETADDR,           getaddr,        getaddr),
 615 };
 616
 617 static struct rpc_procinfo rpcb_procedures4[] = {
 618         PROC(SET,               mapping,        set),
 619         PROC(UNSET,             mapping,        set),
 620         PROC(GETVERSADDR,       getaddr,        getaddr),
 621 };
 622
 623 static struct rpcb_info rpcb_next_version[] = {
 624 #ifdef CONFIG_SUNRPC_BIND34
 625         { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
 626         { 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
 627 #endif
 628         { 2, &rpcb_procedures2[RPCBPROC_GETPORT] },
 629         { 0, NULL },
 630 };
 631
 632 static struct rpcb_info rpcb_next_version6[] = {
 633 #ifdef CONFIG_SUNRPC_BIND34
 634         { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
 635         { 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
 636 #endif
 637         { 0, NULL },
 638 };
 639
 640 static struct rpc_version rpcb_version2 = {
 641         .number         = 2,
 642         .nrprocs        = RPCB_HIGHPROC_2,
 643         .procs          = rpcb_procedures2
 644 };
 645
 646 static struct rpc_version rpcb_version3 = {
 647         .number         = 3,
 648         .nrprocs        = RPCB_HIGHPROC_3,
 649         .procs          = rpcb_procedures3
 650 };
 651
 652 static struct rpc_version rpcb_version4 = {
 653         .number         = 4,
 654         .nrprocs        = RPCB_HIGHPROC_4,
 655         .procs          = rpcb_procedures4
 656 };
 657
 658 static struct rpc_version *rpcb_version[] = {
 659         NULL,
 660         NULL,
 661         &rpcb_version2,
 662         &rpcb_version3,
 663         &rpcb_version4
 664 };
 665
 666 static struct rpc_stat rpcb_stats;
 667
 668 struct rpc_program rpcb_program = {
 669         .name           = "rpcbind",
 670         .number         = RPCBIND_PROGRAM,
 671         .nrvers         = ARRAY_SIZE(rpcb_version),
 672         .version        = rpcb_version,
 673         .stats          = &rpcb_stats,
 674 };