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_getport_prepare(struct rpc_task *task, void *calldata)
 132 {
 133         struct rpcbind_args *map = calldata;
 134         struct rpc_xprt *xprt = map->r_xprt;
 135         struct rpc_message msg = {
 136                 .rpc_proc       = rpcb_next_version[xprt->bind_index].rpc_proc,
 137                 .rpc_argp       = map,
 138                 .rpc_resp       = &map->r_port,
 139         };
 140
 141         rpc_call_setup(task, &msg, 0);
 142 }
 143
 144 static void rpcb_map_release(void *data)
 145 {
 146         struct rpcbind_args *map = data;
 147
 148         xprt_put(map->r_xprt);
 149         kfree(map);
 150 }
 151
 152 static const struct rpc_call_ops rpcb_getport_ops = {
 153         .rpc_call_prepare       = rpcb_getport_prepare,
 154         .rpc_call_done          = rpcb_getport_done,
 155         .rpc_release            = rpcb_map_release,
 156 };
 157
 158 static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status)
 159 {
 160         xprt_clear_binding(xprt);
 161         rpc_wake_up_status(&xprt->binding, status);
 162 }
 163
 164 static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
 165                                         int proto, int version, int privileged)
 166 {
 167         struct rpc_create_args args = {
 168                 .protocol       = proto,
 169                 .address        = srvaddr,
 170                 .addrsize       = sizeof(struct sockaddr_in),
 171                 .servername     = hostname,
 172                 .program        = &rpcb_program,
 173                 .version        = version,
 174                 .authflavor     = RPC_AUTH_UNIX,
 175                 .flags          = (RPC_CLNT_CREATE_NOPING |
 176                                    RPC_CLNT_CREATE_INTR),
 177         };
 178
 179         switch (srvaddr->sa_family) {
 180         case AF_INET:
 181                 ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
 182                 break;
 183         case AF_INET6:
 184                 ((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT);
 185                 break;
 186         default:
 187                 return NULL;
 188         }
 189
 190         if (!privileged)
 191                 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
 192         return rpc_create(&args);
 193 }
 194
 195 /**
 196  * rpcb_register - set or unset a port registration with the local rpcbind svc
 197  * @prog: RPC program number to bind
 198  * @vers: RPC version number to bind
 199  * @prot: transport protocol to use to make this request
 200  * @port: port value to register
 201  * @okay: result code
 202  *
 203  * port == 0 means unregister, port != 0 means register.
 204  *
 205  * This routine supports only rpcbind version 2.
 206  */
 207 int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
 208 {
 209         struct sockaddr_in sin = {
 210                 .sin_family             = AF_INET,
 211                 .sin_addr.s_addr        = htonl(INADDR_LOOPBACK),
 212         };
 213         struct rpcbind_args map = {
 214                 .r_prog         = prog,
 215                 .r_vers         = vers,
 216                 .r_prot         = prot,
 217                 .r_port         = port,
 218         };
 219         struct rpc_message msg = {
 220                 .rpc_proc       = &rpcb_procedures2[port ?
 221                                         RPCBPROC_SET : RPCBPROC_UNSET],
 222                 .rpc_argp       = &map,
 223                 .rpc_resp       = okay,
 224         };
 225         struct rpc_clnt *rpcb_clnt;
 226         int error = 0;
 227
 228         dprintk("RPC:       %sregistering (%u, %u, %d, %u) with local "
 229                         "rpcbind\n", (port ? "" : "un"),
 230                         prog, vers, prot, port);
 231
 232         rpcb_clnt = rpcb_create("localhost", (struct sockaddr *) &sin,
 233                                         XPRT_TRANSPORT_UDP, 2, 1);
 234         if (IS_ERR(rpcb_clnt))
 235                 return PTR_ERR(rpcb_clnt);
 236
 237         error = rpc_call_sync(rpcb_clnt, &msg, 0);
 238
 239         rpc_shutdown_client(rpcb_clnt);
 240         if (error < 0)
 241                 printk(KERN_WARNING "RPC: failed to contact local rpcbind "
 242                                 "server (errno %d).\n", -error);
 243         dprintk("RPC:       registration status %d/%d\n", error, *okay);
 244
 245         return error;
 246 }
 247
 248 /**
 249  * rpcb_getport_sync - obtain the port for an RPC service on a given host
 250  * @sin: address of remote peer
 251  * @prog: RPC program number to bind
 252  * @vers: RPC version number to bind
 253  * @prot: transport protocol to use to make this request
 254  *
 255  * Called from outside the RPC client in a synchronous task context.
 256  * Uses default timeout parameters specified by underlying transport.
 257  *
 258  * XXX: Needs to support IPv6, and rpcbind versions 3 and 4
 259  */
 260 int rpcb_getport_sync(struct sockaddr_in *sin, __u32 prog,
 261                       __u32 vers, int prot)
 262 {
 263         struct rpcbind_args map = {
 264                 .r_prog         = prog,
 265                 .r_vers         = vers,
 266                 .r_prot         = prot,
 267                 .r_port         = 0,
 268         };
 269         struct rpc_message msg = {
 270                 .rpc_proc       = &rpcb_procedures2[RPCBPROC_GETPORT],
 271                 .rpc_argp       = &map,
 272                 .rpc_resp       = &map.r_port,
 273         };
 274         struct rpc_clnt *rpcb_clnt;
 275         char hostname[40];
 276         int status;
 277
 278         dprintk("RPC:       %s(" NIPQUAD_FMT ", %u, %u, %d)\n",
 279                 __FUNCTION__, NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
 280
 281         sprintf(hostname, NIPQUAD_FMT, NIPQUAD(sin->sin_addr.s_addr));
 282         rpcb_clnt = rpcb_create(hostname, (struct sockaddr *)sin, prot, 2, 0);
 283         if (IS_ERR(rpcb_clnt))
 284                 return PTR_ERR(rpcb_clnt);
 285
 286         status = rpc_call_sync(rpcb_clnt, &msg, 0);
 287         rpc_shutdown_client(rpcb_clnt);
 288
 289         if (status >= 0) {
 290                 if (map.r_port != 0)
 291                         return map.r_port;
 292                 status = -EACCES;
 293         }
 294         return status;
 295 }
 296 EXPORT_SYMBOL_GPL(rpcb_getport_sync);
 297
 298 /**
 299  * rpcb_getport_async - obtain the port for a given RPC service on a given host
 300  * @task: task that is waiting for portmapper request
 301  *
 302  * This one can be called for an ongoing RPC request, and can be used in
 303  * an async (rpciod) context.
 304  */
 305 void rpcb_getport_async(struct rpc_task *task)
 306 {
 307         struct rpc_clnt *clnt = task->tk_client;
 308         int bind_version;
 309         struct rpc_xprt *xprt = task->tk_xprt;
 310         struct rpc_clnt *rpcb_clnt;
 311         static struct rpcbind_args *map;
 312         struct rpc_task *child;
 313         struct rpc_task_setup task_setup_data = {
 314                 .callback_ops = &rpcb_getport_ops,
 315                 .flags = RPC_TASK_ASYNC,
 316         };
 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         task_setup_data.rpc_client = rpcb_clnt;
 403         task_setup_data.callback_data = map;
 404         child = rpc_run_task(&task_setup_data);
 405         rpc_release_client(rpcb_clnt);
 406         if (IS_ERR(child)) {
 407                 status = -EIO;
 408                 dprintk("RPC: %5u %s: rpc_run_task failed\n",
 409                         task->tk_pid, __FUNCTION__);
 410                 goto bailout;
 411         }
 412         rpc_put_task(child);
 413
 414         task->tk_xprt->stat.bind_count++;
 415         return;
 416
 417 bailout:
 418         kfree(map);
 419         xprt_put(xprt);
 420 bailout_nofree:
 421         rpcb_wake_rpcbind_waiters(xprt, status);
 422 bailout_nowake:
 423         task->tk_status = status;
 424 }
 425 EXPORT_SYMBOL_GPL(rpcb_getport_async);
 426
 427 /*
 428  * Rpcbind child task calls this callback via tk_exit.
 429  */
 430 static void rpcb_getport_done(struct rpc_task *child, void *data)
 431 {
 432         struct rpcbind_args *map = data;
 433         struct rpc_xprt *xprt = map->r_xprt;
 434         int status = child->tk_status;
 435
 436         /* Garbage reply: retry with a lesser rpcbind version */
 437         if (status == -EIO)
 438                 status = -EPROTONOSUPPORT;
 439
 440         /* rpcbind server doesn't support this rpcbind protocol version */
 441         if (status == -EPROTONOSUPPORT)
 442                 xprt->bind_index++;
 443
 444         if (status < 0) {
 445                 /* rpcbind server not available on remote host? */
 446                 xprt->ops->set_port(xprt, 0);
 447         } else if (map->r_port == 0) {
 448                 /* Requested RPC service wasn't registered on remote host */
 449                 xprt->ops->set_port(xprt, 0);
 450                 status = -EACCES;
 451         } else {
 452                 /* Succeeded */
 453                 xprt->ops->set_port(xprt, map->r_port);
 454                 xprt_set_bound(xprt);
 455                 status = 0;
 456         }
 457
 458         dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
 459                         child->tk_pid, status, map->r_port);
 460
 461         rpcb_wake_rpcbind_waiters(xprt, status);
 462 }
 463
 464 static int rpcb_encode_mapping(struct rpc_rqst *req, __be32 *p,
 465                                struct rpcbind_args *rpcb)
 466 {
 467         dprintk("RPC:       rpcb_encode_mapping(%u, %u, %d, %u)\n",
 468                         rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port);
 469         *p++ = htonl(rpcb->r_prog);
 470         *p++ = htonl(rpcb->r_vers);
 471         *p++ = htonl(rpcb->r_prot);
 472         *p++ = htonl(rpcb->r_port);
 473
 474         req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
 475         return 0;
 476 }
 477
 478 static int rpcb_decode_getport(struct rpc_rqst *req, __be32 *p,
 479                                unsigned short *portp)
 480 {
 481         *portp = (unsigned short) ntohl(*p++);
 482         dprintk("RPC:      rpcb_decode_getport result %u\n",
 483                         *portp);
 484         return 0;
 485 }
 486
 487 static int rpcb_decode_set(struct rpc_rqst *req, __be32 *p,
 488                            unsigned int *boolp)
 489 {
 490         *boolp = (unsigned int) ntohl(*p++);
 491         dprintk("RPC:      rpcb_decode_set result %u\n",
 492                         *boolp);
 493         return 0;
 494 }
 495
 496 static int rpcb_encode_getaddr(struct rpc_rqst *req, __be32 *p,
 497                                struct rpcbind_args *rpcb)
 498 {
 499         dprintk("RPC:       rpcb_encode_getaddr(%u, %u, %s)\n",
 500                         rpcb->r_prog, rpcb->r_vers, rpcb->r_addr);
 501         *p++ = htonl(rpcb->r_prog);
 502         *p++ = htonl(rpcb->r_vers);
 503
 504         p = xdr_encode_string(p, rpcb->r_netid);
 505         p = xdr_encode_string(p, rpcb->r_addr);
 506         p = xdr_encode_string(p, rpcb->r_owner);
 507
 508         req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
 509
 510         return 0;
 511 }
 512
 513 static int rpcb_decode_getaddr(struct rpc_rqst *req, __be32 *p,
 514                                unsigned short *portp)
 515 {
 516         char *addr;
 517         u32 addr_len;
 518         int c, i, f, first, val;
 519
 520         *portp = 0;
 521         addr_len = ntohl(*p++);
 522
 523         /*
 524          * Simple sanity check.  The smallest possible universal
 525          * address is an IPv4 address string containing 11 bytes.
 526          */
 527         if (addr_len < 11 || addr_len > RPCB_MAXADDRLEN)
 528                 goto out_err;
 529
 530         /*
 531          * Start at the end and walk backwards until the first dot
 532          * is encountered.  When the second dot is found, we have
 533          * both parts of the port number.
 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         /*
 557          * Simple sanity check.  If we never saw a dot in the reply,
 558          * then this was probably just garbage.
 559          */
 560         if (first)
 561                 goto out_err;
 562
 563         dprintk("RPC:       rpcb_decode_getaddr port=%u\n", *portp);
 564         return 0;
 565
 566 out_err:
 567         dprintk("RPC:       rpcbind server returned malformed reply\n");
 568         return -EIO;
 569 }
 570
 571 #define RPCB_program_sz         (1u)
 572 #define RPCB_version_sz         (1u)
 573 #define RPCB_protocol_sz        (1u)
 574 #define RPCB_port_sz            (1u)
 575 #define RPCB_boolean_sz         (1u)
 576
 577 #define RPCB_netid_sz           (1+XDR_QUADLEN(RPCBIND_MAXNETIDLEN))
 578 #define RPCB_addr_sz            (1+XDR_QUADLEN(RPCB_MAXADDRLEN))
 579 #define RPCB_ownerstring_sz     (1+XDR_QUADLEN(RPCB_MAXOWNERLEN))
 580
 581 #define RPCB_mappingargs_sz     RPCB_program_sz+RPCB_version_sz+        \
 582                                 RPCB_protocol_sz+RPCB_port_sz
 583 #define RPCB_getaddrargs_sz     RPCB_program_sz+RPCB_version_sz+        \
 584                                 RPCB_netid_sz+RPCB_addr_sz+             \
 585                                 RPCB_ownerstring_sz
 586
 587 #define RPCB_setres_sz          RPCB_boolean_sz
 588 #define RPCB_getportres_sz      RPCB_port_sz
 589
 590 /*
 591  * Note that RFC 1833 does not put any size restrictions on the
 592  * address string returned by the remote rpcbind database.
 593  */
 594 #define RPCB_getaddrres_sz      RPCB_addr_sz
 595
 596 #define PROC(proc, argtype, restype)                                    \
 597         [RPCBPROC_##proc] = {                                           \
 598                 .p_proc         = RPCBPROC_##proc,                      \
 599                 .p_encode       = (kxdrproc_t) rpcb_encode_##argtype,   \
 600                 .p_decode       = (kxdrproc_t) rpcb_decode_##restype,   \
 601                 .p_arglen       = RPCB_##argtype##args_sz,              \
 602                 .p_replen       = RPCB_##restype##res_sz,               \
 603                 .p_statidx      = RPCBPROC_##proc,                      \
 604                 .p_timer        = 0,                                    \
 605                 .p_name         = #proc,                                \
 606         }
 607
 608 /*
 609  * Not all rpcbind procedures described in RFC 1833 are implemented
 610  * since the Linux kernel RPC code requires only these.
 611  */
 612 static struct rpc_procinfo rpcb_procedures2[] = {
 613         PROC(SET,               mapping,        set),
 614         PROC(UNSET,             mapping,        set),
 615         PROC(GETADDR,           mapping,        getport),
 616 };
 617
 618 static struct rpc_procinfo rpcb_procedures3[] = {
 619         PROC(SET,               mapping,        set),
 620         PROC(UNSET,             mapping,        set),
 621         PROC(GETADDR,           getaddr,        getaddr),
 622 };
 623
 624 static struct rpc_procinfo rpcb_procedures4[] = {
 625         PROC(SET,               mapping,        set),
 626         PROC(UNSET,             mapping,        set),
 627         PROC(GETVERSADDR,       getaddr,        getaddr),
 628 };
 629
 630 static struct rpcb_info rpcb_next_version[] = {
 631 #ifdef CONFIG_SUNRPC_BIND34
 632         { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
 633         { 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
 634 #endif
 635         { 2, &rpcb_procedures2[RPCBPROC_GETPORT] },
 636         { 0, NULL },
 637 };
 638
 639 static struct rpcb_info rpcb_next_version6[] = {
 640 #ifdef CONFIG_SUNRPC_BIND34
 641         { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
 642         { 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
 643 #endif
 644         { 0, NULL },
 645 };
 646
 647 static struct rpc_version rpcb_version2 = {
 648         .number         = 2,
 649         .nrprocs        = RPCB_HIGHPROC_2,
 650         .procs          = rpcb_procedures2
 651 };
 652
 653 static struct rpc_version rpcb_version3 = {
 654         .number         = 3,
 655         .nrprocs        = RPCB_HIGHPROC_3,
 656         .procs          = rpcb_procedures3
 657 };
 658
 659 static struct rpc_version rpcb_version4 = {
 660         .number         = 4,
 661         .nrprocs        = RPCB_HIGHPROC_4,
 662         .procs          = rpcb_procedures4
 663 };
 664
 665 static struct rpc_version *rpcb_version[] = {
 666         NULL,
 667         NULL,
 668         &rpcb_version2,
 669         &rpcb_version3,
 670         &rpcb_version4
 671 };
 672
 673 static struct rpc_stat rpcb_stats;
 674
 675 static struct rpc_program rpcb_program = {
 676         .name           = "rpcbind",
 677         .number         = RPCBIND_PROGRAM,
 678         .nrvers         = ARRAY_SIZE(rpcb_version),
 679         .version        = rpcb_version,
 680         .stats          = &rpcb_stats,
 681 };