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_netid
  97  *
  98  * Quoting RFC 3530, section 2.2:
  99  *
 100  * For TCP over IPv4 the value of r_netid is the string "tcp".  For UDP
 101  * over IPv4 the value of r_netid is the string "udp".
 102  *
 103  * ...
 104  *
 105  * For TCP over IPv6 the value of r_netid is the string "tcp6".  For UDP
 106  * over IPv6 the value of r_netid is the string "udp6".
 107  */
 108 #define RPCB_NETID_UDP  "\165\144\160"          /* "udp" */
 109 #define RPCB_NETID_TCP  "\164\143\160"          /* "tcp" */
 110 #define RPCB_NETID_UDP6 "\165\144\160\066"      /* "udp6" */
 111 #define RPCB_NETID_TCP6 "\164\143\160\066"      /* "tcp6" */
 112
 113 #define RPCB_MAXNETIDLEN        (4u)
 114
 115 /*
 116  * r_owner
 117  *
 118  * The "owner" is allowed to unset a service in the rpcbind database.
 119  * We always use the following (arbitrary) fixed string.
 120  */
 121 #define RPCB_OWNER_STRING       "rpcb"
 122 #define RPCB_MAXOWNERLEN        sizeof(RPCB_OWNER_STRING)
 123
 124 static void                     rpcb_getport_done(struct rpc_task *, void *);
 125 extern struct rpc_program       rpcb_program;
 126
 127 struct rpcbind_args {
 128         struct rpc_xprt *       r_xprt;
 129
 130         u32                     r_prog;
 131         u32                     r_vers;
 132         u32                     r_prot;
 133         unsigned short          r_port;
 134         char *                  r_netid;
 135         char                    r_addr[RPCB_MAXADDRLEN];
 136         char *                  r_owner;
 137 };
 138
 139 static struct rpc_procinfo rpcb_procedures2[];
 140 static struct rpc_procinfo rpcb_procedures3[];
 141
 142 struct rpcb_info {
 143         int                     rpc_vers;
 144         struct rpc_procinfo *   rpc_proc;
 145 };
 146
 147 static struct rpcb_info rpcb_next_version[];
 148 static struct rpcb_info rpcb_next_version6[];
 149
 150 static void rpcb_getport_prepare(struct rpc_task *task, void *calldata)
 151 {
 152         struct rpcbind_args *map = calldata;
 153         struct rpc_xprt *xprt = map->r_xprt;
 154         struct rpc_message msg = {
 155                 .rpc_proc       = rpcb_next_version[xprt->bind_index].rpc_proc,
 156                 .rpc_argp       = map,
 157                 .rpc_resp       = &map->r_port,
 158         };
 159
 160         rpc_call_setup(task, &msg, 0);
 161 }
 162
 163 static void rpcb_map_release(void *data)
 164 {
 165         struct rpcbind_args *map = data;
 166
 167         xprt_put(map->r_xprt);
 168         kfree(map);
 169 }
 170
 171 static const struct rpc_call_ops rpcb_getport_ops = {
 172         .rpc_call_prepare       = rpcb_getport_prepare,
 173         .rpc_call_done          = rpcb_getport_done,
 174         .rpc_release            = rpcb_map_release,
 175 };
 176
 177 static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status)
 178 {
 179         xprt_clear_binding(xprt);
 180         rpc_wake_up_status(&xprt->binding, status);
 181 }
 182
 183 static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
 184                                         int proto, int version, int privileged)
 185 {
 186         struct rpc_create_args args = {
 187                 .protocol       = proto,
 188                 .address        = srvaddr,
 189                 .addrsize       = sizeof(struct sockaddr_in),
 190                 .servername     = hostname,
 191                 .program        = &rpcb_program,
 192                 .version        = version,
 193                 .authflavor     = RPC_AUTH_UNIX,
 194                 .flags          = (RPC_CLNT_CREATE_NOPING |
 195                                    RPC_CLNT_CREATE_INTR),
 196         };
 197
 198         switch (srvaddr->sa_family) {
 199         case AF_INET:
 200                 ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
 201                 break;
 202         case AF_INET6:
 203                 ((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT);
 204                 break;
 205         default:
 206                 return NULL;
 207         }
 208
 209         if (!privileged)
 210                 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
 211         return rpc_create(&args);
 212 }
 213
 214 /**
 215  * rpcb_register - set or unset a port registration with the local rpcbind svc
 216  * @prog: RPC program number to bind
 217  * @vers: RPC version number to bind
 218  * @prot: transport protocol to use to make this request
 219  * @port: port value to register
 220  * @okay: result code
 221  *
 222  * port == 0 means unregister, port != 0 means register.
 223  *
 224  * This routine supports only rpcbind version 2.
 225  */
 226 int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
 227 {
 228         struct sockaddr_in sin = {
 229                 .sin_family             = AF_INET,
 230                 .sin_addr.s_addr        = htonl(INADDR_LOOPBACK),
 231         };
 232         struct rpcbind_args map = {
 233                 .r_prog         = prog,
 234                 .r_vers         = vers,
 235                 .r_prot         = prot,
 236                 .r_port         = port,
 237         };
 238         struct rpc_message msg = {
 239                 .rpc_proc       = &rpcb_procedures2[port ?
 240                                         RPCBPROC_SET : RPCBPROC_UNSET],
 241                 .rpc_argp       = &map,
 242                 .rpc_resp       = okay,
 243         };
 244         struct rpc_clnt *rpcb_clnt;
 245         int error = 0;
 246
 247         dprintk("RPC:       %sregistering (%u, %u, %d, %u) with local "
 248                         "rpcbind\n", (port ? "" : "un"),
 249                         prog, vers, prot, port);
 250
 251         rpcb_clnt = rpcb_create("localhost", (struct sockaddr *) &sin,
 252                                         IPPROTO_UDP, 2, 1);
 253         if (IS_ERR(rpcb_clnt))
 254                 return PTR_ERR(rpcb_clnt);
 255
 256         error = rpc_call_sync(rpcb_clnt, &msg, 0);
 257
 258         rpc_shutdown_client(rpcb_clnt);
 259         if (error < 0)
 260                 printk(KERN_WARNING "RPC: failed to contact local rpcbind "
 261                                 "server (errno %d).\n", -error);
 262         dprintk("RPC:       registration status %d/%d\n", error, *okay);
 263
 264         return error;
 265 }
 266
 267 /**
 268  * rpcb_getport_sync - obtain the port for an RPC service on a given host
 269  * @sin: address of remote peer
 270  * @prog: RPC program number to bind
 271  * @vers: RPC version number to bind
 272  * @prot: transport protocol to use to make this request
 273  *
 274  * Called from outside the RPC client in a synchronous task context.
 275  * Uses default timeout parameters specified by underlying transport.
 276  *
 277  * XXX: Needs to support IPv6, and rpcbind versions 3 and 4
 278  */
 279 int rpcb_getport_sync(struct sockaddr_in *sin, __u32 prog,
 280                       __u32 vers, int prot)
 281 {
 282         struct rpcbind_args map = {
 283                 .r_prog         = prog,
 284                 .r_vers         = vers,
 285                 .r_prot         = prot,
 286                 .r_port         = 0,
 287         };
 288         struct rpc_message msg = {
 289                 .rpc_proc       = &rpcb_procedures2[RPCBPROC_GETPORT],
 290                 .rpc_argp       = &map,
 291                 .rpc_resp       = &map.r_port,
 292         };
 293         struct rpc_clnt *rpcb_clnt;
 294         char hostname[40];
 295         int status;
 296
 297         dprintk("RPC:       %s(" NIPQUAD_FMT ", %u, %u, %d)\n",
 298                 __FUNCTION__, NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
 299
 300         sprintf(hostname, NIPQUAD_FMT, NIPQUAD(sin->sin_addr.s_addr));
 301         rpcb_clnt = rpcb_create(hostname, (struct sockaddr *)sin, prot, 2, 0);
 302         if (IS_ERR(rpcb_clnt))
 303                 return PTR_ERR(rpcb_clnt);
 304
 305         status = rpc_call_sync(rpcb_clnt, &msg, 0);
 306         rpc_shutdown_client(rpcb_clnt);
 307
 308         if (status >= 0) {
 309                 if (map.r_port != 0)
 310                         return map.r_port;
 311                 status = -EACCES;
 312         }
 313         return status;
 314 }
 315 EXPORT_SYMBOL_GPL(rpcb_getport_sync);
 316
 317 /**
 318  * rpcb_getport_async - obtain the port for a given RPC service on a given host
 319  * @task: task that is waiting for portmapper request
 320  *
 321  * This one can be called for an ongoing RPC request, and can be used in
 322  * an async (rpciod) context.
 323  */
 324 void rpcb_getport_async(struct rpc_task *task)
 325 {
 326         struct rpc_clnt *clnt = task->tk_client;
 327         int bind_version;
 328         struct rpc_xprt *xprt = task->tk_xprt;
 329         struct rpc_clnt *rpcb_clnt;
 330         static struct rpcbind_args *map;
 331         struct rpc_task *child;
 332         struct sockaddr addr;
 333         int status;
 334         struct rpcb_info *info;
 335
 336         dprintk("RPC: %5u %s(%s, %u, %u, %d)\n",
 337                 task->tk_pid, __FUNCTION__,
 338                 clnt->cl_server, clnt->cl_prog, clnt->cl_vers, xprt->prot);
 339
 340         /* Autobind on cloned rpc clients is discouraged */
 341         BUG_ON(clnt->cl_parent != clnt);
 342
 343         if (xprt_test_and_set_binding(xprt)) {
 344                 status = -EACCES;               /* tell caller to check again */
 345                 dprintk("RPC: %5u %s: waiting for another binder\n",
 346                         task->tk_pid, __FUNCTION__);
 347                 goto bailout_nowake;
 348         }
 349
 350         /* Put self on queue before sending rpcbind request, in case
 351          * rpcb_getport_done completes before we return from rpc_run_task */
 352         rpc_sleep_on(&xprt->binding, task, NULL, NULL);
 353
 354         /* Someone else may have bound if we slept */
 355         if (xprt_bound(xprt)) {
 356                 status = 0;
 357                 dprintk("RPC: %5u %s: already bound\n",
 358                         task->tk_pid, __FUNCTION__);
 359                 goto bailout_nofree;
 360         }
 361
 362         rpc_peeraddr(clnt, (void *)&addr, sizeof(addr));
 363
 364         /* Don't ever use rpcbind v2 for AF_INET6 requests */
 365         switch (addr.sa_family) {
 366         case AF_INET:
 367                 info = rpcb_next_version;
 368                 break;
 369         case AF_INET6:
 370                 info = rpcb_next_version6;
 371                 break;
 372         default:
 373                 status = -EAFNOSUPPORT;
 374                 dprintk("RPC: %5u %s: bad address family\n",
 375                                 task->tk_pid, __FUNCTION__);
 376                 goto bailout_nofree;
 377         }
 378         if (info[xprt->bind_index].rpc_proc == NULL) {
 379                 xprt->bind_index = 0;
 380                 status = -EACCES;       /* tell caller to try again later */
 381                 dprintk("RPC: %5u %s: no more getport versions available\n",
 382                         task->tk_pid, __FUNCTION__);
 383                 goto bailout_nofree;
 384         }
 385         bind_version = info[xprt->bind_index].rpc_vers;
 386
 387         dprintk("RPC: %5u %s: trying rpcbind version %u\n",
 388                 task->tk_pid, __FUNCTION__, bind_version);
 389
 390         map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC);
 391         if (!map) {
 392                 status = -ENOMEM;
 393                 dprintk("RPC: %5u %s: no memory available\n",
 394                         task->tk_pid, __FUNCTION__);
 395                 goto bailout_nofree;
 396         }
 397         map->r_prog = clnt->cl_prog;
 398         map->r_vers = clnt->cl_vers;
 399         map->r_prot = xprt->prot;
 400         map->r_port = 0;
 401         map->r_xprt = xprt_get(xprt);
 402         map->r_netid = (xprt->prot == IPPROTO_TCP) ? RPCB_NETID_TCP :
 403                                                    RPCB_NETID_UDP;
 404         memcpy(&map->r_addr, rpc_peeraddr2str(clnt, RPC_DISPLAY_ADDR),
 405                         sizeof(map->r_addr));
 406         map->r_owner = RPCB_OWNER_STRING;       /* ignored for GETADDR */
 407
 408         rpcb_clnt = rpcb_create(clnt->cl_server, &addr, xprt->prot, bind_version, 0);
 409         if (IS_ERR(rpcb_clnt)) {
 410                 status = PTR_ERR(rpcb_clnt);
 411                 dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n",
 412                         task->tk_pid, __FUNCTION__, PTR_ERR(rpcb_clnt));
 413                 goto bailout;
 414         }
 415
 416         child = rpc_run_task(rpcb_clnt, RPC_TASK_ASYNC, &rpcb_getport_ops, map);
 417         rpc_release_client(rpcb_clnt);
 418         if (IS_ERR(child)) {
 419                 status = -EIO;
 420                 dprintk("RPC: %5u %s: rpc_run_task failed\n",
 421                         task->tk_pid, __FUNCTION__);
 422                 goto bailout_nofree;
 423         }
 424         rpc_put_task(child);
 425
 426         task->tk_xprt->stat.bind_count++;
 427         return;
 428
 429 bailout:
 430         kfree(map);
 431         xprt_put(xprt);
 432 bailout_nofree:
 433         rpcb_wake_rpcbind_waiters(xprt, status);
 434 bailout_nowake:
 435         task->tk_status = status;
 436 }
 437
 438 /*
 439  * Rpcbind child task calls this callback via tk_exit.
 440  */
 441 static void rpcb_getport_done(struct rpc_task *child, void *data)
 442 {
 443         struct rpcbind_args *map = data;
 444         struct rpc_xprt *xprt = map->r_xprt;
 445         int status = child->tk_status;
 446
 447         /* rpcbind server doesn't support this rpcbind protocol version */
 448         if (status == -EPROTONOSUPPORT)
 449                 xprt->bind_index++;
 450
 451         if (status < 0) {
 452                 /* rpcbind server not available on remote host? */
 453                 xprt->ops->set_port(xprt, 0);
 454         } else if (map->r_port == 0) {
 455                 /* Requested RPC service wasn't registered on remote host */
 456                 xprt->ops->set_port(xprt, 0);
 457                 status = -EACCES;
 458         } else {
 459                 /* Succeeded */
 460                 xprt->ops->set_port(xprt, map->r_port);
 461                 xprt_set_bound(xprt);
 462                 status = 0;
 463         }
 464
 465         dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
 466                         child->tk_pid, status, map->r_port);
 467
 468         rpcb_wake_rpcbind_waiters(xprt, status);
 469 }
 470
 471 static int rpcb_encode_mapping(struct rpc_rqst *req, __be32 *p,
 472                                struct rpcbind_args *rpcb)
 473 {
 474         dprintk("RPC:       rpcb_encode_mapping(%u, %u, %d, %u)\n",
 475                         rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port);
 476         *p++ = htonl(rpcb->r_prog);
 477         *p++ = htonl(rpcb->r_vers);
 478         *p++ = htonl(rpcb->r_prot);
 479         *p++ = htonl(rpcb->r_port);
 480
 481         req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
 482         return 0;
 483 }
 484
 485 static int rpcb_decode_getport(struct rpc_rqst *req, __be32 *p,
 486                                unsigned short *portp)
 487 {
 488         *portp = (unsigned short) ntohl(*p++);
 489         dprintk("RPC:      rpcb_decode_getport result %u\n",
 490                         *portp);
 491         return 0;
 492 }
 493
 494 static int rpcb_decode_set(struct rpc_rqst *req, __be32 *p,
 495                            unsigned int *boolp)
 496 {
 497         *boolp = (unsigned int) ntohl(*p++);
 498         dprintk("RPC:      rpcb_decode_set result %u\n",
 499                         *boolp);
 500         return 0;
 501 }
 502
 503 static int rpcb_encode_getaddr(struct rpc_rqst *req, __be32 *p,
 504                                struct rpcbind_args *rpcb)
 505 {
 506         dprintk("RPC:       rpcb_encode_getaddr(%u, %u, %s)\n",
 507                         rpcb->r_prog, rpcb->r_vers, rpcb->r_addr);
 508         *p++ = htonl(rpcb->r_prog);
 509         *p++ = htonl(rpcb->r_vers);
 510
 511         p = xdr_encode_string(p, rpcb->r_netid);
 512         p = xdr_encode_string(p, rpcb->r_addr);
 513         p = xdr_encode_string(p, rpcb->r_owner);
 514
 515         req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
 516
 517         return 0;
 518 }
 519
 520 static int rpcb_decode_getaddr(struct rpc_rqst *req, __be32 *p,
 521                                unsigned short *portp)
 522 {
 523         char *addr;
 524         u32 addr_len;
 525         int c, i, f, first, val;
 526
 527         *portp = 0;
 528         addr_len = ntohl(*p++);
 529         if (addr_len > RPCB_MAXADDRLEN)                 /* sanity */
 530                 return -EINVAL;
 531
 532         dprintk("RPC:       rpcb_decode_getaddr returned string: '%s'\n",
 533                         (char *) p);
 534
 535         addr = (char *)p;
 536         val = 0;
 537         first = 1;
 538         f = 1;
 539         for (i = addr_len - 1; i > 0; i--) {
 540                 c = addr[i];
 541                 if (c >= '0' && c <= '9') {
 542                         val += (c - '0') * f;
 543                         f *= 10;
 544                 } else if (c == '.') {
 545                         if (first) {
 546                                 *portp = val;
 547                                 val = first = 0;
 548                                 f = 1;
 549                         } else {
 550                                 *portp |= (val << 8);
 551                                 break;
 552                         }
 553                 }
 554         }
 555
 556         dprintk("RPC:       rpcb_decode_getaddr port=%u\n", *portp);
 557         return 0;
 558 }
 559
 560 #define RPCB_program_sz         (1u)
 561 #define RPCB_version_sz         (1u)
 562 #define RPCB_protocol_sz        (1u)
 563 #define RPCB_port_sz            (1u)
 564 #define RPCB_boolean_sz         (1u)
 565
 566 #define RPCB_netid_sz           (1+XDR_QUADLEN(RPCB_MAXNETIDLEN))
 567 #define RPCB_addr_sz            (1+XDR_QUADLEN(RPCB_MAXADDRLEN))
 568 #define RPCB_ownerstring_sz     (1+XDR_QUADLEN(RPCB_MAXOWNERLEN))
 569
 570 #define RPCB_mappingargs_sz     RPCB_program_sz+RPCB_version_sz+        \
 571                                 RPCB_protocol_sz+RPCB_port_sz
 572 #define RPCB_getaddrargs_sz     RPCB_program_sz+RPCB_version_sz+        \
 573                                 RPCB_netid_sz+RPCB_addr_sz+             \
 574                                 RPCB_ownerstring_sz
 575
 576 #define RPCB_setres_sz          RPCB_boolean_sz
 577 #define RPCB_getportres_sz      RPCB_port_sz
 578
 579 /*
 580  * Note that RFC 1833 does not put any size restrictions on the
 581  * address string returned by the remote rpcbind database.
 582  */
 583 #define RPCB_getaddrres_sz      RPCB_addr_sz
 584
 585 #define PROC(proc, argtype, restype)                                    \
 586         [RPCBPROC_##proc] = {                                           \
 587                 .p_proc         = RPCBPROC_##proc,                      \
 588                 .p_encode       = (kxdrproc_t) rpcb_encode_##argtype,   \
 589                 .p_decode       = (kxdrproc_t) rpcb_decode_##restype,   \
 590                 .p_arglen       = RPCB_##argtype##args_sz,              \
 591                 .p_replen       = RPCB_##restype##res_sz,               \
 592                 .p_statidx      = RPCBPROC_##proc,                      \
 593                 .p_timer        = 0,                                    \
 594                 .p_name         = #proc,                                \
 595         }
 596
 597 /*
 598  * Not all rpcbind procedures described in RFC 1833 are implemented
 599  * since the Linux kernel RPC code requires only these.
 600  */
 601 static struct rpc_procinfo rpcb_procedures2[] = {
 602         PROC(SET,               mapping,        set),
 603         PROC(UNSET,             mapping,        set),
 604         PROC(GETADDR,           mapping,        getport),
 605 };
 606
 607 static struct rpc_procinfo rpcb_procedures3[] = {
 608         PROC(SET,               mapping,        set),
 609         PROC(UNSET,             mapping,        set),
 610         PROC(GETADDR,           getaddr,        getaddr),
 611 };
 612
 613 static struct rpc_procinfo rpcb_procedures4[] = {
 614         PROC(SET,               mapping,        set),
 615         PROC(UNSET,             mapping,        set),
 616         PROC(GETVERSADDR,       getaddr,        getaddr),
 617 };
 618
 619 static struct rpcb_info rpcb_next_version[] = {
 620 #ifdef CONFIG_SUNRPC_BIND34
 621         { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
 622         { 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
 623 #endif
 624         { 2, &rpcb_procedures2[RPCBPROC_GETPORT] },
 625         { 0, NULL },
 626 };
 627
 628 static struct rpcb_info rpcb_next_version6[] = {
 629 #ifdef CONFIG_SUNRPC_BIND34
 630         { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
 631         { 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
 632 #endif
 633         { 0, NULL },
 634 };
 635
 636 static struct rpc_version rpcb_version2 = {
 637         .number         = 2,
 638         .nrprocs        = RPCB_HIGHPROC_2,
 639         .procs          = rpcb_procedures2
 640 };
 641
 642 static struct rpc_version rpcb_version3 = {
 643         .number         = 3,
 644         .nrprocs        = RPCB_HIGHPROC_3,
 645         .procs          = rpcb_procedures3
 646 };
 647
 648 static struct rpc_version rpcb_version4 = {
 649         .number         = 4,
 650         .nrprocs        = RPCB_HIGHPROC_4,
 651         .procs          = rpcb_procedures4
 652 };
 653
 654 static struct rpc_version *rpcb_version[] = {
 655         NULL,
 656         NULL,
 657         &rpcb_version2,
 658         &rpcb_version3,
 659         &rpcb_version4
 660 };
 661
 662 static struct rpc_stat rpcb_stats;
 663
 664 struct rpc_program rpcb_program = {
 665         .name           = "rpcbind",
 666         .number         = RPCBIND_PROGRAM,
 667         .nrvers         = ARRAY_SIZE(rpcb_version),
 668         .version        = rpcb_version,
 669         .stats          = &rpcb_stats,
 670 };