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/kernel.h>
  20 #include <linux/errno.h>
  21
  22 #include <linux/sunrpc/clnt.h>
  23 #include <linux/sunrpc/sched.h>
  24
  25 #ifdef RPC_DEBUG
  26 # define RPCDBG_FACILITY        RPCDBG_BIND
  27 #endif
  28
  29 #define RPCBIND_PROGRAM         (100000u)
  30 #define RPCBIND_PORT            (111u)
  31
  32 enum {
  33         RPCBPROC_NULL,
  34         RPCBPROC_SET,
  35         RPCBPROC_UNSET,
  36         RPCBPROC_GETPORT,
  37         RPCBPROC_GETADDR = 3,           /* alias for GETPORT */
  38         RPCBPROC_DUMP,
  39         RPCBPROC_CALLIT,
  40         RPCBPROC_BCAST = 5,             /* alias for CALLIT */
  41         RPCBPROC_GETTIME,
  42         RPCBPROC_UADDR2TADDR,
  43         RPCBPROC_TADDR2UADDR,
  44         RPCBPROC_GETVERSADDR,
  45         RPCBPROC_INDIRECT,
  46         RPCBPROC_GETADDRLIST,
  47         RPCBPROC_GETSTAT,
  48 };
  49
  50 #define RPCB_HIGHPROC_2         RPCBPROC_CALLIT
  51 #define RPCB_HIGHPROC_3         RPCBPROC_TADDR2UADDR
  52 #define RPCB_HIGHPROC_4         RPCBPROC_GETSTAT
  53
  54 /*
  55  * r_addr
  56  *
  57  * Quoting RFC 3530, section 2.2:
  58  *
  59  * For TCP over IPv4 and for UDP over IPv4, the format of r_addr is the
  60  * US-ASCII string:
  61  *
  62  *      h1.h2.h3.h4.p1.p2
  63  *
  64  * The prefix, "h1.h2.h3.h4", is the standard textual form for
  65  * representing an IPv4 address, which is always four octets long.
  66  * Assuming big-endian ordering, h1, h2, h3, and h4, are respectively,
  67  * the first through fourth octets each converted to ASCII-decimal.
  68  * Assuming big-endian ordering, p1 and p2 are, respectively, the first
  69  * and second octets each converted to ASCII-decimal.  For example, if a
  70  * host, in big-endian order, has an address of 0x0A010307 and there is
  71  * a service listening on, in big endian order, port 0x020F (decimal
  72  * 527), then the complete universal address is "10.1.3.7.2.15".
  73  *
  74  * ...
  75  *
  76  * For TCP over IPv6 and for UDP over IPv6, the format of r_addr is the
  77  * US-ASCII string:
  78  *
  79  *      x1:x2:x3:x4:x5:x6:x7:x8.p1.p2
  80  *
  81  * The suffix "p1.p2" is the service port, and is computed the same way
  82  * as with universal addresses for TCP and UDP over IPv4.  The prefix,
  83  * "x1:x2:x3:x4:x5:x6:x7:x8", is the standard textual form for
  84  * representing an IPv6 address as defined in Section 2.2 of [RFC2373].
  85  * Additionally, the two alternative forms specified in Section 2.2 of
  86  * [RFC2373] are also acceptable.
  87  *
  88  * XXX: Currently this implementation does not explicitly convert the
  89  *      stored address to US-ASCII on non-ASCII systems.
  90  */
  91 #define RPCB_MAXADDRLEN         (128u)
  92
  93 /*
  94  * r_netid
  95  *
  96  * Quoting RFC 3530, section 2.2:
  97  *
  98  * For TCP over IPv4 the value of r_netid is the string "tcp".  For UDP
  99  * over IPv4 the value of r_netid is the string "udp".
 100  *
 101  * ...
 102  *
 103  * For TCP over IPv6 the value of r_netid is the string "tcp6".  For UDP
 104  * over IPv6 the value of r_netid is the string "udp6".
 105  */
 106 #define RPCB_NETID_UDP  "\165\144\160"          /* "udp" */
 107 #define RPCB_NETID_TCP  "\164\143\160"          /* "tcp" */
 108 #define RPCB_NETID_UDP6 "\165\144\160\066"      /* "udp6" */
 109 #define RPCB_NETID_TCP6 "\164\143\160\066"      /* "tcp6" */
 110
 111 #define RPCB_MAXNETIDLEN        (4u)
 112
 113 /*
 114  * r_owner
 115  *
 116  * The "owner" is allowed to unset a service in the rpcbind database.
 117  * We always use the following (arbitrary) fixed string.
 118  */
 119 #define RPCB_OWNER_STRING       "rpcb"
 120 #define RPCB_MAXOWNERLEN        sizeof(RPCB_OWNER_STRING)
 121
 122 static void                     rpcb_getport_done(struct rpc_task *, void *);
 123 extern struct rpc_program       rpcb_program;
 124
 125 struct rpcbind_args {
 126         struct rpc_xprt *       r_xprt;
 127
 128         u32                     r_prog;
 129         u32                     r_vers;
 130         u32                     r_prot;
 131         unsigned short          r_port;
 132         char *                  r_netid;
 133         char                    r_addr[RPCB_MAXADDRLEN];
 134         char *                  r_owner;
 135 };
 136
 137 static struct rpc_procinfo rpcb_procedures2[];
 138 static struct rpc_procinfo rpcb_procedures3[];
 139
 140 static struct rpcb_info {
 141         int                     rpc_vers;
 142         struct rpc_procinfo *   rpc_proc;
 143 } rpcb_next_version[];
 144
 145 static void rpcb_getport_prepare(struct rpc_task *task, void *calldata)
 146 {
 147         struct rpcbind_args *map = calldata;
 148         struct rpc_xprt *xprt = map->r_xprt;
 149         struct rpc_message msg = {
 150                 .rpc_proc       = rpcb_next_version[xprt->bind_index].rpc_proc,
 151                 .rpc_argp       = map,
 152                 .rpc_resp       = &map->r_port,
 153         };
 154
 155         rpc_call_setup(task, &msg, 0);
 156 }
 157
 158 static void rpcb_map_release(void *data)
 159 {
 160         struct rpcbind_args *map = data;
 161
 162         xprt_put(map->r_xprt);
 163         kfree(map);
 164 }
 165
 166 static const struct rpc_call_ops rpcb_getport_ops = {
 167         .rpc_call_prepare       = rpcb_getport_prepare,
 168         .rpc_call_done          = rpcb_getport_done,
 169         .rpc_release            = rpcb_map_release,
 170 };
 171
 172 static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status)
 173 {
 174         xprt_clear_binding(xprt);
 175         rpc_wake_up_status(&xprt->binding, status);
 176 }
 177
 178 static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
 179                                         int proto, int version, int privileged)
 180 {
 181         struct rpc_create_args args = {
 182                 .protocol       = proto,
 183                 .address        = srvaddr,
 184                 .addrsize       = sizeof(struct sockaddr_in),
 185                 .servername     = hostname,
 186                 .program        = &rpcb_program,
 187                 .version        = version,
 188                 .authflavor     = RPC_AUTH_UNIX,
 189                 .flags          = (RPC_CLNT_CREATE_NOPING |
 190                                    RPC_CLNT_CREATE_INTR),
 191         };
 192
 193         ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
 194         if (!privileged)
 195                 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
 196         return rpc_create(&args);
 197 }
 198
 199 /**
 200  * rpcb_register - set or unset a port registration with the local rpcbind svc
 201  * @prog: RPC program number to bind
 202  * @vers: RPC version number to bind
 203  * @prot: transport protocol to use to make this request
 204  * @port: port value to register
 205  * @okay: result code
 206  *
 207  * port == 0 means unregister, port != 0 means register.
 208  *
 209  * This routine supports only rpcbind version 2.
 210  */
 211 int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
 212 {
 213         struct sockaddr_in sin = {
 214                 .sin_family             = AF_INET,
 215                 .sin_addr.s_addr        = htonl(INADDR_LOOPBACK),
 216         };
 217         struct rpcbind_args map = {
 218                 .r_prog         = prog,
 219                 .r_vers         = vers,
 220                 .r_prot         = prot,
 221                 .r_port         = port,
 222         };
 223         struct rpc_message msg = {
 224                 .rpc_proc       = &rpcb_procedures2[port ?
 225                                         RPCBPROC_SET : RPCBPROC_UNSET],
 226                 .rpc_argp       = &map,
 227                 .rpc_resp       = okay,
 228         };
 229         struct rpc_clnt *rpcb_clnt;
 230         int error = 0;
 231
 232         dprintk("RPC:       %sregistering (%u, %u, %d, %u) with local "
 233                         "rpcbind\n", (port ? "" : "un"),
 234                         prog, vers, prot, port);
 235
 236         rpcb_clnt = rpcb_create("localhost", (struct sockaddr *) &sin,
 237                                         IPPROTO_UDP, 2, 1);
 238         if (IS_ERR(rpcb_clnt))
 239                 return PTR_ERR(rpcb_clnt);
 240
 241         error = rpc_call_sync(rpcb_clnt, &msg, 0);
 242
 243         rpc_shutdown_client(rpcb_clnt);
 244         if (error < 0)
 245                 printk(KERN_WARNING "RPC: failed to contact local rpcbind "
 246                                 "server (errno %d).\n", -error);
 247         dprintk("RPC:       registration status %d/%d\n", error, *okay);
 248
 249         return error;
 250 }
 251
 252 /**
 253  * rpcb_getport_sync - obtain the port for an RPC service on a given host
 254  * @sin: address of remote peer
 255  * @prog: RPC program number to bind
 256  * @vers: RPC version number to bind
 257  * @prot: transport protocol to use to make this request
 258  *
 259  * Called from outside the RPC client in a synchronous task context.
 260  * Uses default timeout parameters specified by underlying transport.
 261  *
 262  * XXX: Needs to support IPv6, and rpcbind versions 3 and 4
 263  */
 264 int rpcb_getport_sync(struct sockaddr_in *sin, __u32 prog,
 265                       __u32 vers, int prot)
 266 {
 267         struct rpcbind_args map = {
 268                 .r_prog         = prog,
 269                 .r_vers         = vers,
 270                 .r_prot         = prot,
 271                 .r_port         = 0,
 272         };
 273         struct rpc_message msg = {
 274                 .rpc_proc       = &rpcb_procedures2[RPCBPROC_GETPORT],
 275                 .rpc_argp       = &map,
 276                 .rpc_resp       = &map.r_port,
 277         };
 278         struct rpc_clnt *rpcb_clnt;
 279         char hostname[40];
 280         int status;
 281
 282         dprintk("RPC:       %s(" NIPQUAD_FMT ", %u, %u, %d)\n",
 283                 __FUNCTION__, NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
 284
 285         sprintf(hostname, NIPQUAD_FMT, NIPQUAD(sin->sin_addr.s_addr));
 286         rpcb_clnt = rpcb_create(hostname, (struct sockaddr *)sin, prot, 2, 0);
 287         if (IS_ERR(rpcb_clnt))
 288                 return PTR_ERR(rpcb_clnt);
 289
 290         status = rpc_call_sync(rpcb_clnt, &msg, 0);
 291         rpc_shutdown_client(rpcb_clnt);
 292
 293         if (status >= 0) {
 294                 if (map.r_port != 0)
 295                         return map.r_port;
 296                 status = -EACCES;
 297         }
 298         return status;
 299 }
 300 EXPORT_SYMBOL_GPL(rpcb_getport_sync);
 301
 302 /**
 303  * rpcb_getport_async - obtain the port for a given RPC service on a given host
 304  * @task: task that is waiting for portmapper request
 305  *
 306  * This one can be called for an ongoing RPC request, and can be used in
 307  * an async (rpciod) context.
 308  */
 309 void rpcb_getport_async(struct rpc_task *task)
 310 {
 311         struct rpc_clnt *clnt = task->tk_client;
 312         int bind_version;
 313         struct rpc_xprt *xprt = task->tk_xprt;
 314         struct rpc_clnt *rpcb_clnt;
 315         static struct rpcbind_args *map;
 316         struct rpc_task *child;
 317         struct sockaddr addr;
 318         int status;
 319
 320         dprintk("RPC: %5u %s(%s, %u, %u, %d)\n",
 321                 task->tk_pid, __FUNCTION__,
 322                 clnt->cl_server, clnt->cl_prog, clnt->cl_vers, xprt->prot);
 323
 324         /* Autobind on cloned rpc clients is discouraged */
 325         BUG_ON(clnt->cl_parent != clnt);
 326
 327         if (xprt_test_and_set_binding(xprt)) {
 328                 status = -EACCES;               /* tell caller to check again */
 329                 dprintk("RPC: %5u %s: waiting for another binder\n",
 330                         task->tk_pid, __FUNCTION__);
 331                 goto bailout_nowake;
 332         }
 333
 334         /* Put self on queue before sending rpcbind request, in case
 335          * rpcb_getport_done completes before we return from rpc_run_task */
 336         rpc_sleep_on(&xprt->binding, task, NULL, NULL);
 337
 338         /* Someone else may have bound if we slept */
 339         if (xprt_bound(xprt)) {
 340                 status = 0;
 341                 dprintk("RPC: %5u %s: already bound\n",
 342                         task->tk_pid, __FUNCTION__);
 343                 goto bailout_nofree;
 344         }
 345
 346         if (rpcb_next_version[xprt->bind_index].rpc_proc == NULL) {
 347                 xprt->bind_index = 0;
 348                 status = -EACCES;       /* tell caller to try again later */
 349                 dprintk("RPC: %5u %s: no more getport versions available\n",
 350                         task->tk_pid, __FUNCTION__);
 351                 goto bailout_nofree;
 352         }
 353         bind_version = rpcb_next_version[xprt->bind_index].rpc_vers;
 354
 355         dprintk("RPC: %5u %s: trying rpcbind version %u\n",
 356                 task->tk_pid, __FUNCTION__, bind_version);
 357
 358         map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC);
 359         if (!map) {
 360                 status = -ENOMEM;
 361                 dprintk("RPC: %5u %s: no memory available\n",
 362                         task->tk_pid, __FUNCTION__);
 363                 goto bailout_nofree;
 364         }
 365         map->r_prog = clnt->cl_prog;
 366         map->r_vers = clnt->cl_vers;
 367         map->r_prot = xprt->prot;
 368         map->r_port = 0;
 369         map->r_xprt = xprt_get(xprt);
 370         map->r_netid = (xprt->prot == IPPROTO_TCP) ? RPCB_NETID_TCP :
 371                                                    RPCB_NETID_UDP;
 372         memcpy(&map->r_addr, rpc_peeraddr2str(clnt, RPC_DISPLAY_ADDR),
 373                         sizeof(map->r_addr));
 374         map->r_owner = RPCB_OWNER_STRING;       /* ignored for GETADDR */
 375
 376         rpc_peeraddr(clnt, (void *)&addr, sizeof(addr));
 377         rpcb_clnt = rpcb_create(clnt->cl_server, &addr, xprt->prot, bind_version, 0);
 378         if (IS_ERR(rpcb_clnt)) {
 379                 status = PTR_ERR(rpcb_clnt);
 380                 dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n",
 381                         task->tk_pid, __FUNCTION__, PTR_ERR(rpcb_clnt));
 382                 goto bailout;
 383         }
 384
 385         child = rpc_run_task(rpcb_clnt, RPC_TASK_ASYNC, &rpcb_getport_ops, map);
 386         rpc_release_client(rpcb_clnt);
 387         if (IS_ERR(child)) {
 388                 status = -EIO;
 389                 dprintk("RPC: %5u %s: rpc_run_task failed\n",
 390                         task->tk_pid, __FUNCTION__);
 391                 goto bailout_nofree;
 392         }
 393         rpc_put_task(child);
 394
 395         task->tk_xprt->stat.bind_count++;
 396         return;
 397
 398 bailout:
 399         kfree(map);
 400         xprt_put(xprt);
 401 bailout_nofree:
 402         rpcb_wake_rpcbind_waiters(xprt, status);
 403 bailout_nowake:
 404         task->tk_status = status;
 405 }
 406
 407 /*
 408  * Rpcbind child task calls this callback via tk_exit.
 409  */
 410 static void rpcb_getport_done(struct rpc_task *child, void *data)
 411 {
 412         struct rpcbind_args *map = data;
 413         struct rpc_xprt *xprt = map->r_xprt;
 414         int status = child->tk_status;
 415
 416         /* rpcbind server doesn't support this rpcbind protocol version */
 417         if (status == -EPROTONOSUPPORT)
 418                 xprt->bind_index++;
 419
 420         if (status < 0) {
 421                 /* rpcbind server not available on remote host? */
 422                 xprt->ops->set_port(xprt, 0);
 423         } else if (map->r_port == 0) {
 424                 /* Requested RPC service wasn't registered on remote host */
 425                 xprt->ops->set_port(xprt, 0);
 426                 status = -EACCES;
 427         } else {
 428                 /* Succeeded */
 429                 xprt->ops->set_port(xprt, map->r_port);
 430                 xprt_set_bound(xprt);
 431                 status = 0;
 432         }
 433
 434         dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
 435                         child->tk_pid, status, map->r_port);
 436
 437         rpcb_wake_rpcbind_waiters(xprt, status);
 438 }
 439
 440 static int rpcb_encode_mapping(struct rpc_rqst *req, __be32 *p,
 441                                struct rpcbind_args *rpcb)
 442 {
 443         dprintk("RPC:       rpcb_encode_mapping(%u, %u, %d, %u)\n",
 444                         rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port);
 445         *p++ = htonl(rpcb->r_prog);
 446         *p++ = htonl(rpcb->r_vers);
 447         *p++ = htonl(rpcb->r_prot);
 448         *p++ = htonl(rpcb->r_port);
 449
 450         req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
 451         return 0;
 452 }
 453
 454 static int rpcb_decode_getport(struct rpc_rqst *req, __be32 *p,
 455                                unsigned short *portp)
 456 {
 457         *portp = (unsigned short) ntohl(*p++);
 458         dprintk("RPC:      rpcb_decode_getport result %u\n",
 459                         *portp);
 460         return 0;
 461 }
 462
 463 static int rpcb_decode_set(struct rpc_rqst *req, __be32 *p,
 464                            unsigned int *boolp)
 465 {
 466         *boolp = (unsigned int) ntohl(*p++);
 467         dprintk("RPC:      rpcb_decode_set result %u\n",
 468                         *boolp);
 469         return 0;
 470 }
 471
 472 static int rpcb_encode_getaddr(struct rpc_rqst *req, __be32 *p,
 473                                struct rpcbind_args *rpcb)
 474 {
 475         dprintk("RPC:       rpcb_encode_getaddr(%u, %u, %s)\n",
 476                         rpcb->r_prog, rpcb->r_vers, rpcb->r_addr);
 477         *p++ = htonl(rpcb->r_prog);
 478         *p++ = htonl(rpcb->r_vers);
 479
 480         p = xdr_encode_string(p, rpcb->r_netid);
 481         p = xdr_encode_string(p, rpcb->r_addr);
 482         p = xdr_encode_string(p, rpcb->r_owner);
 483
 484         req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
 485
 486         return 0;
 487 }
 488
 489 static int rpcb_decode_getaddr(struct rpc_rqst *req, __be32 *p,
 490                                unsigned short *portp)
 491 {
 492         char *addr;
 493         int addr_len, c, i, f, first, val;
 494
 495         *portp = 0;
 496         addr_len = (unsigned int) ntohl(*p++);
 497         if (addr_len > RPCB_MAXADDRLEN)                 /* sanity */
 498                 return -EINVAL;
 499
 500         dprintk("RPC:       rpcb_decode_getaddr returned string: '%s'\n",
 501                         (char *) p);
 502
 503         addr = (char *)p;
 504         val = 0;
 505         first = 1;
 506         f = 1;
 507         for (i = addr_len - 1; i > 0; i--) {
 508                 c = addr[i];
 509                 if (c >= '0' && c <= '9') {
 510                         val += (c - '0') * f;
 511                         f *= 10;
 512                 } else if (c == '.') {
 513                         if (first) {
 514                                 *portp = val;
 515                                 val = first = 0;
 516                                 f = 1;
 517                         } else {
 518                                 *portp |= (val << 8);
 519                                 break;
 520                         }
 521                 }
 522         }
 523
 524         dprintk("RPC:       rpcb_decode_getaddr port=%u\n", *portp);
 525         return 0;
 526 }
 527
 528 #define RPCB_program_sz         (1u)
 529 #define RPCB_version_sz         (1u)
 530 #define RPCB_protocol_sz        (1u)
 531 #define RPCB_port_sz            (1u)
 532 #define RPCB_boolean_sz         (1u)
 533
 534 #define RPCB_netid_sz           (1+XDR_QUADLEN(RPCB_MAXNETIDLEN))
 535 #define RPCB_addr_sz            (1+XDR_QUADLEN(RPCB_MAXADDRLEN))
 536 #define RPCB_ownerstring_sz     (1+XDR_QUADLEN(RPCB_MAXOWNERLEN))
 537
 538 #define RPCB_mappingargs_sz     RPCB_program_sz+RPCB_version_sz+        \
 539                                 RPCB_protocol_sz+RPCB_port_sz
 540 #define RPCB_getaddrargs_sz     RPCB_program_sz+RPCB_version_sz+        \
 541                                 RPCB_netid_sz+RPCB_addr_sz+             \
 542                                 RPCB_ownerstring_sz
 543
 544 #define RPCB_setres_sz          RPCB_boolean_sz
 545 #define RPCB_getportres_sz      RPCB_port_sz
 546
 547 /*
 548  * Note that RFC 1833 does not put any size restrictions on the
 549  * address string returned by the remote rpcbind database.
 550  */
 551 #define RPCB_getaddrres_sz      RPCB_addr_sz
 552
 553 #define PROC(proc, argtype, restype)                                    \
 554         [RPCBPROC_##proc] = {                                           \
 555                 .p_proc         = RPCBPROC_##proc,                      \
 556                 .p_encode       = (kxdrproc_t) rpcb_encode_##argtype,   \
 557                 .p_decode       = (kxdrproc_t) rpcb_decode_##restype,   \
 558                 .p_arglen       = RPCB_##argtype##args_sz,              \
 559                 .p_replen       = RPCB_##restype##res_sz,               \
 560                 .p_statidx      = RPCBPROC_##proc,                      \
 561                 .p_timer        = 0,                                    \
 562                 .p_name         = #proc,                                \
 563         }
 564
 565 /*
 566  * Not all rpcbind procedures described in RFC 1833 are implemented
 567  * since the Linux kernel RPC code requires only these.
 568  */
 569 static struct rpc_procinfo rpcb_procedures2[] = {
 570         PROC(SET,               mapping,        set),
 571         PROC(UNSET,             mapping,        set),
 572         PROC(GETADDR,           mapping,        getport),
 573 };
 574
 575 static struct rpc_procinfo rpcb_procedures3[] = {
 576         PROC(SET,               mapping,        set),
 577         PROC(UNSET,             mapping,        set),
 578         PROC(GETADDR,           getaddr,        getaddr),
 579 };
 580
 581 static struct rpc_procinfo rpcb_procedures4[] = {
 582         PROC(SET,               mapping,        set),
 583         PROC(UNSET,             mapping,        set),
 584         PROC(GETVERSADDR,       getaddr,        getaddr),
 585 };
 586
 587 static struct rpcb_info rpcb_next_version[] = {
 588 #ifdef CONFIG_SUNRPC_BIND34
 589         { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
 590         { 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
 591 #endif
 592         { 2, &rpcb_procedures2[RPCBPROC_GETPORT] },
 593         { 0, NULL },
 594 };
 595
 596 static struct rpc_version rpcb_version2 = {
 597         .number         = 2,
 598         .nrprocs        = RPCB_HIGHPROC_2,
 599         .procs          = rpcb_procedures2
 600 };
 601
 602 static struct rpc_version rpcb_version3 = {
 603         .number         = 3,
 604         .nrprocs        = RPCB_HIGHPROC_3,
 605         .procs          = rpcb_procedures3
 606 };
 607
 608 static struct rpc_version rpcb_version4 = {
 609         .number         = 4,
 610         .nrprocs        = RPCB_HIGHPROC_4,
 611         .procs          = rpcb_procedures4
 612 };
 613
 614 static struct rpc_version *rpcb_version[] = {
 615         NULL,
 616         NULL,
 617         &rpcb_version2,
 618         &rpcb_version3,
 619         &rpcb_version4
 620 };
 621
 622 static struct rpc_stat rpcb_stats;
 623
 624 struct rpc_program rpcb_program = {
 625         .name           = "rpcbind",
 626         .number         = RPCBIND_PROGRAM,
 627         .nrvers         = ARRAY_SIZE(rpcb_version),
 628         .version        = rpcb_version,
 629         .stats          = &rpcb_stats,
 630 };