net/sunrpc/rpcb_clnt.c

   1 /*
   2  * In-kernel rpcbind client supporting versions 2, 3, and 4 of the rpcbind
   3  * protocol
   4  *
   5  * Based on RFC 1833: "Binding Protocols for ONC RPC Version 2" and
   6  * RFC 3530: "Network File System (NFS) version 4 Protocol"
   7  *
   8  * Original: Gilles Quillard, Bull Open Source, 2005 <gilles.quillard@bull.net>
   9  * Updated: Chuck Lever, Oracle Corporation, 2007 <chuck.lever@oracle.com>
  10  *
  11  * Descended from net/sunrpc/pmap_clnt.c,
  12  *  Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
  13  */
  14
  15 #include <linux/module.h>
  16
  17 #include <linux/types.h>
  18 #include <linux/socket.h>
  19 #include <linux/in.h>
  20 #include <linux/in6.h>
  21 #include <linux/kernel.h>
  22 #include <linux/errno.h>
  23
  24 #include <linux/sunrpc/clnt.h>
  25 #include <linux/sunrpc/sched.h>
  26 #include <linux/sunrpc/xprtsock.h>
  27
  28 #ifdef RPC_DEBUG
  29 # define RPCDBG_FACILITY        RPCDBG_BIND
  30 #endif
  31
  32 #define RPCBIND_PROGRAM         (100000u)
  33 #define RPCBIND_PORT            (111u)
  34
  35 enum {
  36         RPCBPROC_NULL,
  37         RPCBPROC_SET,
  38         RPCBPROC_UNSET,
  39         RPCBPROC_GETPORT,
  40         RPCBPROC_GETADDR = 3,           /* alias for GETPORT */
  41         RPCBPROC_DUMP,
  42         RPCBPROC_CALLIT,
  43         RPCBPROC_BCAST = 5,             /* alias for CALLIT */
  44         RPCBPROC_GETTIME,
  45         RPCBPROC_UADDR2TADDR,
  46         RPCBPROC_TADDR2UADDR,
  47         RPCBPROC_GETVERSADDR,
  48         RPCBPROC_INDIRECT,
  49         RPCBPROC_GETADDRLIST,
  50         RPCBPROC_GETSTAT,
  51 };
  52
  53 #define RPCB_HIGHPROC_2         RPCBPROC_CALLIT
  54 #define RPCB_HIGHPROC_3         RPCBPROC_TADDR2UADDR
  55 #define RPCB_HIGHPROC_4         RPCBPROC_GETSTAT
  56
  57 /*
  58  * r_addr
  59  *
  60  * Quoting RFC 3530, section 2.2:
  61  *
  62  * For TCP over IPv4 and for UDP over IPv4, the format of r_addr is the
  63  * US-ASCII string:
  64  *
  65  *      h1.h2.h3.h4.p1.p2
  66  *
  67  * The prefix, "h1.h2.h3.h4", is the standard textual form for
  68  * representing an IPv4 address, which is always four octets long.
  69  * Assuming big-endian ordering, h1, h2, h3, and h4, are respectively,
  70  * the first through fourth octets each converted to ASCII-decimal.
  71  * Assuming big-endian ordering, p1 and p2 are, respectively, the first
  72  * and second octets each converted to ASCII-decimal.  For example, if a
  73  * host, in big-endian order, has an address of 0x0A010307 and there is
  74  * a service listening on, in big endian order, port 0x020F (decimal
  75  * 527), then the complete universal address is "10.1.3.7.2.15".
  76  *
  77  * ...
  78  *
  79  * For TCP over IPv6 and for UDP over IPv6, the format of r_addr is the
  80  * US-ASCII string:
  81  *
  82  *      x1:x2:x3:x4:x5:x6:x7:x8.p1.p2
  83  *
  84  * The suffix "p1.p2" is the service port, and is computed the same way
  85  * as with universal addresses for TCP and UDP over IPv4.  The prefix,
  86  * "x1:x2:x3:x4:x5:x6:x7:x8", is the standard textual form for
  87  * representing an IPv6 address as defined in Section 2.2 of [RFC2373].
  88  * Additionally, the two alternative forms specified in Section 2.2 of
  89  * [RFC2373] are also acceptable.
  90  *
  91  * XXX: Currently this implementation does not explicitly convert the
  92  *      stored address to US-ASCII on non-ASCII systems.
  93  */
  94 #define RPCB_MAXADDRLEN         (128u)
  95
  96 /*
  97  * r_owner
  98  *
  99  * The "owner" is allowed to unset a service in the rpcbind database.
 100  * We always use the following (arbitrary) fixed string.
 101  */
 102 #define RPCB_OWNER_STRING       "rpcb"
 103 #define RPCB_MAXOWNERLEN        sizeof(RPCB_OWNER_STRING)
 104
 105 static void                     rpcb_getport_done(struct rpc_task *, void *);
 106 static struct rpc_program       rpcb_program;
 107
 108 struct rpcbind_args {
 109         struct rpc_xprt *       r_xprt;
 110
 111         u32                     r_prog;
 112         u32                     r_vers;
 113         u32                     r_prot;
 114         unsigned short          r_port;
 115         char *                  r_netid;
 116         char                    r_addr[RPCB_MAXADDRLEN];
 117         char *                  r_owner;
 118 };
 119
 120 static struct rpc_procinfo rpcb_procedures2[];
 121 static struct rpc_procinfo rpcb_procedures3[];
 122
 123 struct rpcb_info {
 124         int                     rpc_vers;
 125         struct rpc_procinfo *   rpc_proc;
 126 };
 127
 128 static struct rpcb_info rpcb_next_version[];
 129 static struct rpcb_info rpcb_next_version6[];
 130
 131 static void rpcb_map_release(void *data)
 132 {
 133         struct rpcbind_args *map = data;
 134
 135         xprt_put(map->r_xprt);
 136         kfree(map);
 137 }
 138
 139 static const struct rpc_call_ops rpcb_getport_ops = {
 140         .rpc_call_done          = rpcb_getport_done,
 141         .rpc_release            = rpcb_map_release,
 142 };
 143
 144 static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status)
 145 {
 146         xprt_clear_binding(xprt);
 147         rpc_wake_up_status(&xprt->binding, status);
 148 }
 149
 150 static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
 151                                         int proto, int version, int privileged)
 152 {
 153         struct rpc_create_args args = {
 154                 .protocol       = proto,
 155                 .address        = srvaddr,
 156                 .addrsize       = sizeof(struct sockaddr_in),
 157                 .servername     = hostname,
 158                 .program        = &rpcb_program,
 159                 .version        = version,
 160                 .authflavor     = RPC_AUTH_UNIX,
 161                 .flags          = (RPC_CLNT_CREATE_NOPING |
 162                                    RPC_CLNT_CREATE_INTR),
 163         };
 164
 165         switch (srvaddr->sa_family) {
 166         case AF_INET:
 167                 ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
 168                 break;
 169         case AF_INET6:
 170                 ((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT);
 171                 break;
 172         default:
 173                 return NULL;
 174         }
 175
 176         if (!privileged)
 177                 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
 178         return rpc_create(&args);
 179 }
 180
 181 /**
 182  * rpcb_register - set or unset a port registration with the local rpcbind svc
 183  * @prog: RPC program number to bind
 184  * @vers: RPC version number to bind
 185  * @prot: transport protocol to use to make this request
 186  * @port: port value to register
 187  * @okay: result code
 188  *
 189  * port == 0 means unregister, port != 0 means register.
 190  *
 191  * This routine supports only rpcbind version 2.
 192  */
 193 int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
 194 {
 195         struct sockaddr_in sin = {
 196                 .sin_family             = AF_INET,
 197                 .sin_addr.s_addr        = htonl(INADDR_LOOPBACK),
 198         };
 199         struct rpcbind_args map = {
 200                 .r_prog         = prog,
 201                 .r_vers         = vers,
 202                 .r_prot         = prot,
 203                 .r_port         = port,
 204         };
 205         struct rpc_message msg = {
 206                 .rpc_proc       = &rpcb_procedures2[port ?
 207                                         RPCBPROC_SET : RPCBPROC_UNSET],
 208                 .rpc_argp       = &map,
 209                 .rpc_resp       = okay,
 210         };
 211         struct rpc_clnt *rpcb_clnt;
 212         int error = 0;
 213
 214         dprintk("RPC:       %sregistering (%u, %u, %d, %u) with local "
 215                         "rpcbind\n", (port ? "" : "un"),
 216                         prog, vers, prot, port);
 217
 218         rpcb_clnt = rpcb_create("localhost", (struct sockaddr *) &sin,
 219                                         XPRT_TRANSPORT_UDP, 2, 1);
 220         if (IS_ERR(rpcb_clnt))
 221                 return PTR_ERR(rpcb_clnt);
 222
 223         error = rpc_call_sync(rpcb_clnt, &msg, 0);
 224
 225         rpc_shutdown_client(rpcb_clnt);
 226         if (error < 0)
 227                 printk(KERN_WARNING "RPC: failed to contact local rpcbind "
 228                                 "server (errno %d).\n", -error);
 229         dprintk("RPC:       registration status %d/%d\n", error, *okay);
 230
 231         return error;
 232 }
 233
 234 /**
 235  * rpcb_getport_sync - obtain the port for an RPC service on a given host
 236  * @sin: address of remote peer
 237  * @prog: RPC program number to bind
 238  * @vers: RPC version number to bind
 239  * @prot: transport protocol to use to make this request
 240  *
 241  * Called from outside the RPC client in a synchronous task context.
 242  * Uses default timeout parameters specified by underlying transport.
 243  *
 244  * XXX: Needs to support IPv6, and rpcbind versions 3 and 4
 245  */
 246 int rpcb_getport_sync(struct sockaddr_in *sin, __u32 prog,
 247                       __u32 vers, int prot)
 248 {
 249         struct rpcbind_args map = {
 250                 .r_prog         = prog,
 251                 .r_vers         = vers,
 252                 .r_prot         = prot,
 253                 .r_port         = 0,
 254         };
 255         struct rpc_message msg = {
 256                 .rpc_proc       = &rpcb_procedures2[RPCBPROC_GETPORT],
 257                 .rpc_argp       = &map,
 258                 .rpc_resp       = &map.r_port,
 259         };
 260         struct rpc_clnt *rpcb_clnt;
 261         char hostname[40];
 262         int status;
 263
 264         dprintk("RPC:       %s(" NIPQUAD_FMT ", %u, %u, %d)\n",
 265                 __FUNCTION__, NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
 266
 267         sprintf(hostname, NIPQUAD_FMT, NIPQUAD(sin->sin_addr.s_addr));
 268         rpcb_clnt = rpcb_create(hostname, (struct sockaddr *)sin, prot, 2, 0);
 269         if (IS_ERR(rpcb_clnt))
 270                 return PTR_ERR(rpcb_clnt);
 271
 272         status = rpc_call_sync(rpcb_clnt, &msg, 0);
 273         rpc_shutdown_client(rpcb_clnt);
 274
 275         if (status >= 0) {
 276                 if (map.r_port != 0)
 277                         return map.r_port;
 278                 status = -EACCES;
 279         }
 280         return status;
 281 }
 282 EXPORT_SYMBOL_GPL(rpcb_getport_sync);
 283
 284 static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, struct rpcbind_args *map, int version)
 285 {
 286         struct rpc_message msg = {
 287                 .rpc_proc = rpcb_next_version[version].rpc_proc,
 288                 .rpc_argp = map,
 289                 .rpc_resp = &map->r_port,
 290         };
 291         struct rpc_task_setup task_setup_data = {
 292                 .rpc_client = rpcb_clnt,
 293                 .rpc_message = &msg,
 294                 .callback_ops = &rpcb_getport_ops,
 295                 .callback_data = map,
 296                 .flags = RPC_TASK_ASYNC,
 297         };
 298
 299         return rpc_run_task(&task_setup_data);
 300 }
 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         struct rpcb_info *info;
 320
 321         dprintk("RPC: %5u %s(%s, %u, %u, %d)\n",
 322                 task->tk_pid, __FUNCTION__,
 323                 clnt->cl_server, clnt->cl_prog, clnt->cl_vers, xprt->prot);
 324
 325         /* Autobind on cloned rpc clients is discouraged */
 326         BUG_ON(clnt->cl_parent != clnt);
 327
 328         if (xprt_test_and_set_binding(xprt)) {
 329                 status = -EAGAIN;       /* tell caller to check again */
 330                 dprintk("RPC: %5u %s: waiting for another binder\n",
 331                         task->tk_pid, __FUNCTION__);
 332                 goto bailout_nowake;
 333         }
 334
 335         /* Put self on queue before sending rpcbind request, in case
 336          * rpcb_getport_done completes before we return from rpc_run_task */
 337         rpc_sleep_on(&xprt->binding, task, NULL, NULL);
 338
 339         /* Someone else may have bound if we slept */
 340         if (xprt_bound(xprt)) {
 341                 status = 0;
 342                 dprintk("RPC: %5u %s: already bound\n",
 343                         task->tk_pid, __FUNCTION__);
 344                 goto bailout_nofree;
 345         }
 346
 347         rpc_peeraddr(clnt, (void *)&addr, sizeof(addr));
 348
 349         /* Don't ever use rpcbind v2 for AF_INET6 requests */
 350         switch (addr.sa_family) {
 351         case AF_INET:
 352                 info = rpcb_next_version;
 353                 break;
 354         case AF_INET6:
 355                 info = rpcb_next_version6;
 356                 break;
 357         default:
 358                 status = -EAFNOSUPPORT;
 359                 dprintk("RPC: %5u %s: bad address family\n",
 360                                 task->tk_pid, __FUNCTION__);
 361                 goto bailout_nofree;
 362         }
 363         if (info[xprt->bind_index].rpc_proc == NULL) {
 364                 xprt->bind_index = 0;
 365                 status = -EPFNOSUPPORT;
 366                 dprintk("RPC: %5u %s: no more getport versions available\n",
 367                         task->tk_pid, __FUNCTION__);
 368                 goto bailout_nofree;
 369         }
 370         bind_version = info[xprt->bind_index].rpc_vers;
 371
 372         dprintk("RPC: %5u %s: trying rpcbind version %u\n",
 373                 task->tk_pid, __FUNCTION__, bind_version);
 374
 375         rpcb_clnt = rpcb_create(clnt->cl_server, &addr, xprt->prot,
 376                                 bind_version, 0);
 377         if (IS_ERR(rpcb_clnt)) {
 378                 status = PTR_ERR(rpcb_clnt);
 379                 dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n",
 380                         task->tk_pid, __FUNCTION__, PTR_ERR(rpcb_clnt));
 381                 goto bailout_nofree;
 382         }
 383
 384         map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC);
 385         if (!map) {
 386                 status = -ENOMEM;
 387                 dprintk("RPC: %5u %s: no memory available\n",
 388                         task->tk_pid, __FUNCTION__);
 389                 goto bailout_nofree;
 390         }
 391         map->r_prog = clnt->cl_prog;
 392         map->r_vers = clnt->cl_vers;
 393         map->r_prot = xprt->prot;
 394         map->r_port = 0;
 395         map->r_xprt = xprt_get(xprt);
 396         map->r_netid = rpc_peeraddr2str(clnt, RPC_DISPLAY_NETID);
 397         memcpy(map->r_addr,
 398                rpc_peeraddr2str(rpcb_clnt, RPC_DISPLAY_UNIVERSAL_ADDR),
 399                sizeof(map->r_addr));
 400         map->r_owner = RPCB_OWNER_STRING;       /* ignored for GETADDR */
 401
 402         child = rpcb_call_async(rpcb_clnt, map, xprt->bind_index);
 403         rpc_release_client(rpcb_clnt);
 404         if (IS_ERR(child)) {
 405                 status = -EIO;
 406                 dprintk("RPC: %5u %s: rpc_run_task failed\n",
 407                         task->tk_pid, __FUNCTION__);
 408                 goto bailout;
 409         }
 410         rpc_put_task(child);
 411
 412         task->tk_xprt->stat.bind_count++;
 413         return;
 414
 415 bailout:
 416         kfree(map);
 417         xprt_put(xprt);
 418 bailout_nofree:
 419         rpcb_wake_rpcbind_waiters(xprt, status);
 420 bailout_nowake:
 421         task->tk_status = status;
 422 }
 423 EXPORT_SYMBOL_GPL(rpcb_getport_async);
 424
 425 /*
 426  * Rpcbind child task calls this callback via tk_exit.
 427  */
 428 static void rpcb_getport_done(struct rpc_task *child, void *data)
 429 {
 430         struct rpcbind_args *map = data;
 431         struct rpc_xprt *xprt = map->r_xprt;
 432         int status = child->tk_status;
 433
 434         /* Garbage reply: retry with a lesser rpcbind version */
 435         if (status == -EIO)
 436                 status = -EPROTONOSUPPORT;
 437
 438         /* rpcbind server doesn't support this rpcbind protocol version */
 439         if (status == -EPROTONOSUPPORT)
 440                 xprt->bind_index++;
 441
 442         if (status < 0) {
 443                 /* rpcbind server not available on remote host? */
 444                 xprt->ops->set_port(xprt, 0);
 445         } else if (map->r_port == 0) {
 446                 /* Requested RPC service wasn't registered on remote host */
 447                 xprt->ops->set_port(xprt, 0);
 448                 status = -EACCES;
 449         } else {
 450                 /* Succeeded */
 451                 xprt->ops->set_port(xprt, map->r_port);
 452                 xprt_set_bound(xprt);
 453                 status = 0;
 454         }
 455
 456         dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
 457                         child->tk_pid, status, map->r_port);
 458
 459         rpcb_wake_rpcbind_waiters(xprt, status);
 460 }
 461
 462 static int rpcb_encode_mapping(struct rpc_rqst *req, __be32 *p,
 463                                struct rpcbind_args *rpcb)
 464 {
 465         dprintk("RPC:       rpcb_encode_mapping(%u, %u, %d, %u)\n",
 466                         rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port);
 467         *p++ = htonl(rpcb->r_prog);
 468         *p++ = htonl(rpcb->r_vers);
 469         *p++ = htonl(rpcb->r_prot);
 470         *p++ = htonl(rpcb->r_port);
 471
 472         req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
 473         return 0;
 474 }
 475
 476 static int rpcb_decode_getport(struct rpc_rqst *req, __be32 *p,
 477                                unsigned short *portp)
 478 {
 479         *portp = (unsigned short) ntohl(*p++);
 480         dprintk("RPC:      rpcb_decode_getport result %u\n",
 481                         *portp);
 482         return 0;
 483 }
 484
 485 static int rpcb_decode_set(struct rpc_rqst *req, __be32 *p,
 486                            unsigned int *boolp)
 487 {
 488         *boolp = (unsigned int) ntohl(*p++);
 489         dprintk("RPC:      rpcb_decode_set result %u\n",
 490                         *boolp);
 491         return 0;
 492 }
 493
 494 static int rpcb_encode_getaddr(struct rpc_rqst *req, __be32 *p,
 495                                struct rpcbind_args *rpcb)
 496 {
 497         dprintk("RPC:       rpcb_encode_getaddr(%u, %u, %s)\n",
 498                         rpcb->r_prog, rpcb->r_vers, rpcb->r_addr);
 499         *p++ = htonl(rpcb->r_prog);
 500         *p++ = htonl(rpcb->r_vers);
 501
 502         p = xdr_encode_string(p, rpcb->r_netid);
 503         p = xdr_encode_string(p, rpcb->r_addr);
 504         p = xdr_encode_string(p, rpcb->r_owner);
 505
 506         req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
 507
 508         return 0;
 509 }
 510
 511 static int rpcb_decode_getaddr(struct rpc_rqst *req, __be32 *p,
 512                                unsigned short *portp)
 513 {
 514         char *addr;
 515         u32 addr_len;
 516         int c, i, f, first, val;
 517
 518         *portp = 0;
 519         addr_len = ntohl(*p++);
 520
 521         /*
 522          * Simple sanity check.  The smallest possible universal
 523          * address is an IPv4 address string containing 11 bytes.
 524          */
 525         if (addr_len < 11 || addr_len > RPCB_MAXADDRLEN)
 526                 goto out_err;
 527
 528         /*
 529          * Start at the end and walk backwards until the first dot
 530          * is encountered.  When the second dot is found, we have
 531          * both parts of the port number.
 532          */
 533         addr = (char *)p;
 534         val = 0;
 535         first = 1;
 536         f = 1;
 537         for (i = addr_len - 1; i > 0; i--) {
 538                 c = addr[i];
 539                 if (c >= '0' && c <= '9') {
 540                         val += (c - '0') * f;
 541                         f *= 10;
 542                 } else if (c == '.') {
 543                         if (first) {
 544                                 *portp = val;
 545                                 val = first = 0;
 546                                 f = 1;
 547                         } else {
 548                                 *portp |= (val << 8);
 549                                 break;
 550                         }
 551                 }
 552         }
 553
 554         /*
 555          * Simple sanity check.  If we never saw a dot in the reply,
 556          * then this was probably just garbage.
 557          */
 558         if (first)
 559                 goto out_err;
 560
 561         dprintk("RPC:       rpcb_decode_getaddr port=%u\n", *portp);
 562         return 0;
 563
 564 out_err:
 565         dprintk("RPC:       rpcbind server returned malformed reply\n");
 566         return -EIO;
 567 }
 568
 569 #define RPCB_program_sz         (1u)
 570 #define RPCB_version_sz         (1u)
 571 #define RPCB_protocol_sz        (1u)
 572 #define RPCB_port_sz            (1u)
 573 #define RPCB_boolean_sz         (1u)
 574
 575 #define RPCB_netid_sz           (1+XDR_QUADLEN(RPCBIND_MAXNETIDLEN))
 576 #define RPCB_addr_sz            (1+XDR_QUADLEN(RPCB_MAXADDRLEN))
 577 #define RPCB_ownerstring_sz     (1+XDR_QUADLEN(RPCB_MAXOWNERLEN))
 578
 579 #define RPCB_mappingargs_sz     RPCB_program_sz+RPCB_version_sz+        \
 580                                 RPCB_protocol_sz+RPCB_port_sz
 581 #define RPCB_getaddrargs_sz     RPCB_program_sz+RPCB_version_sz+        \
 582                                 RPCB_netid_sz+RPCB_addr_sz+             \
 583                                 RPCB_ownerstring_sz
 584
 585 #define RPCB_setres_sz          RPCB_boolean_sz
 586 #define RPCB_getportres_sz      RPCB_port_sz
 587
 588 /*
 589  * Note that RFC 1833 does not put any size restrictions on the
 590  * address string returned by the remote rpcbind database.
 591  */
 592 #define RPCB_getaddrres_sz      RPCB_addr_sz
 593
 594 #define PROC(proc, argtype, restype)                                    \
 595         [RPCBPROC_##proc] = {                                           \
 596                 .p_proc         = RPCBPROC_##proc,                      \
 597                 .p_encode       = (kxdrproc_t) rpcb_encode_##argtype,   \
 598                 .p_decode       = (kxdrproc_t) rpcb_decode_##restype,   \
 599                 .p_arglen       = RPCB_##argtype##args_sz,              \
 600                 .p_replen       = RPCB_##restype##res_sz,               \
 601                 .p_statidx      = RPCBPROC_##proc,                      \
 602                 .p_timer        = 0,                                    \
 603                 .p_name         = #proc,                                \
 604         }
 605
 606 /*
 607  * Not all rpcbind procedures described in RFC 1833 are implemented
 608  * since the Linux kernel RPC code requires only these.
 609  */
 610 static struct rpc_procinfo rpcb_procedures2[] = {
 611         PROC(SET,               mapping,        set),
 612         PROC(UNSET,             mapping,        set),
 613         PROC(GETADDR,           mapping,        getport),
 614 };
 615
 616 static struct rpc_procinfo rpcb_procedures3[] = {
 617         PROC(SET,               mapping,        set),
 618         PROC(UNSET,             mapping,        set),
 619         PROC(GETADDR,           getaddr,        getaddr),
 620 };
 621
 622 static struct rpc_procinfo rpcb_procedures4[] = {
 623         PROC(SET,               mapping,        set),
 624         PROC(UNSET,             mapping,        set),
 625         PROC(GETVERSADDR,       getaddr,        getaddr),
 626 };
 627
 628 static struct rpcb_info rpcb_next_version[] = {
 629 #ifdef CONFIG_SUNRPC_BIND34
 630         { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
 631         { 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
 632 #endif
 633         { 2, &rpcb_procedures2[RPCBPROC_GETPORT] },
 634         { 0, NULL },
 635 };
 636
 637 static struct rpcb_info rpcb_next_version6[] = {
 638 #ifdef CONFIG_SUNRPC_BIND34
 639         { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
 640         { 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
 641 #endif
 642         { 0, NULL },
 643 };
 644
 645 static struct rpc_version rpcb_version2 = {
 646         .number         = 2,
 647         .nrprocs        = RPCB_HIGHPROC_2,
 648         .procs          = rpcb_procedures2
 649 };
 650
 651 static struct rpc_version rpcb_version3 = {
 652         .number         = 3,
 653         .nrprocs        = RPCB_HIGHPROC_3,
 654         .procs          = rpcb_procedures3
 655 };
 656
 657 static struct rpc_version rpcb_version4 = {
 658         .number         = 4,
 659         .nrprocs        = RPCB_HIGHPROC_4,
 660         .procs          = rpcb_procedures4
 661 };
 662
 663 static struct rpc_version *rpcb_version[] = {
 664         NULL,
 665         NULL,
 666         &rpcb_version2,
 667         &rpcb_version3,
 668         &rpcb_version4
 669 };
 670
 671 static struct rpc_stat rpcb_stats;
 672
 673 static struct rpc_program rpcb_program = {
 674         .name           = "rpcbind",
 675         .number         = RPCBIND_PROGRAM,
 676         .nrvers         = ARRAY_SIZE(rpcb_version),
 677         .version        = rpcb_version,
 678         .stats          = &rpcb_stats,
 679 };