1 /* 2 * linux/fs/lockd/svc.c 3 * 4 * This is the central lockd service. 5 * 6 * FIXME: Separate the lockd NFS server functionality from the lockd NFS 7 * client functionality. Oh why didn't Sun create two separate 8 * services in the first place? 9 * 10 * Authors: Olaf Kirch (okir@monad.swb.de) 11 * 12 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> 13 */ 14 15 #include <linux/module.h> 16 #include <linux/init.h> 17 #include <linux/sysctl.h> 18 #include <linux/moduleparam.h> 19 20 #include <linux/sched.h> 21 #include <linux/errno.h> 22 #include <linux/in.h> 23 #include <linux/uio.h> 24 #include <linux/smp.h> 25 #include <linux/mutex.h> 26 #include <linux/kthread.h> 27 #include <linux/freezer.h> 28 #include <linux/inetdevice.h> 29 30 #include <linux/sunrpc/types.h> 31 #include <linux/sunrpc/stats.h> 32 #include <linux/sunrpc/clnt.h> 33 #include <linux/sunrpc/svc.h> 34 #include <linux/sunrpc/svcsock.h> 35 #include <linux/sunrpc/svc_xprt.h> 36 #include <net/ip.h> 37 #include <net/addrconf.h> 38 #include <net/ipv6.h> 39 #include <linux/lockd/lockd.h> 40 #include <linux/nfs.h> 41 42 #include "netns.h" 43 #include "procfs.h" 44 45 #define NLMDBG_FACILITY NLMDBG_SVC 46 #define LOCKD_BUFSIZE (1024 + NLMSVC_XDRSIZE) 47 #define ALLOWED_SIGS (sigmask(SIGKILL)) 48 49 static struct svc_program nlmsvc_program; 50 51 const struct nlmsvc_binding *nlmsvc_ops; 52 EXPORT_SYMBOL_GPL(nlmsvc_ops); 53 54 static DEFINE_MUTEX(nlmsvc_mutex); 55 static unsigned int nlmsvc_users; 56 static struct task_struct *nlmsvc_task; 57 static struct svc_rqst *nlmsvc_rqst; 58 unsigned long nlmsvc_timeout; 59 60 int lockd_net_id; 61 62 /* 63 * These can be set at insmod time (useful for NFS as root filesystem), 64 * and also changed through the sysctl interface. -- Jamie Lokier, Aug 2003 65 */ 66 static unsigned long nlm_grace_period; 67 static unsigned long nlm_timeout = LOCKD_DFLT_TIMEO; 68 static int nlm_udpport, nlm_tcpport; 69 70 /* RLIM_NOFILE defaults to 1024. That seems like a reasonable default here. */ 71 static unsigned int nlm_max_connections = 1024; 72 73 /* 74 * Constants needed for the sysctl interface. 75 */ 76 static const unsigned long nlm_grace_period_min = 0; 77 static const unsigned long nlm_grace_period_max = 240; 78 static const unsigned long nlm_timeout_min = 3; 79 static const unsigned long nlm_timeout_max = 20; 80 static const int nlm_port_min = 0, nlm_port_max = 65535; 81 82 #ifdef CONFIG_SYSCTL 83 static struct ctl_table_header * nlm_sysctl_table; 84 #endif 85 86 static unsigned long get_lockd_grace_period(void) 87 { 88 /* Note: nlm_timeout should always be nonzero */ 89 if (nlm_grace_period) 90 return roundup(nlm_grace_period, nlm_timeout) * HZ; 91 else 92 return nlm_timeout * 5 * HZ; 93 } 94 95 static void grace_ender(struct work_struct *grace) 96 { 97 struct delayed_work *dwork = to_delayed_work(grace); 98 struct lockd_net *ln = container_of(dwork, struct lockd_net, 99 grace_period_end); 100 101 locks_end_grace(&ln->lockd_manager); 102 } 103 104 static void set_grace_period(struct net *net) 105 { 106 unsigned long grace_period = get_lockd_grace_period(); 107 struct lockd_net *ln = net_generic(net, lockd_net_id); 108 109 locks_start_grace(net, &ln->lockd_manager); 110 cancel_delayed_work_sync(&ln->grace_period_end); 111 schedule_delayed_work(&ln->grace_period_end, grace_period); 112 } 113 114 static void restart_grace(void) 115 { 116 if (nlmsvc_ops) { 117 struct net *net = &init_net; 118 struct lockd_net *ln = net_generic(net, lockd_net_id); 119 120 cancel_delayed_work_sync(&ln->grace_period_end); 121 locks_end_grace(&ln->lockd_manager); 122 nlmsvc_invalidate_all(); 123 set_grace_period(net); 124 } 125 } 126 127 /* 128 * This is the lockd kernel thread 129 */ 130 static int 131 lockd(void *vrqstp) 132 { 133 int err = 0; 134 struct svc_rqst *rqstp = vrqstp; 135 136 /* try_to_freeze() is called from svc_recv() */ 137 set_freezable(); 138 139 /* Allow SIGKILL to tell lockd to drop all of its locks */ 140 allow_signal(SIGKILL); 141 142 dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n"); 143 144 /* 145 * The main request loop. We don't terminate until the last 146 * NFS mount or NFS daemon has gone away. 147 */ 148 while (!kthread_should_stop()) { 149 long timeout = MAX_SCHEDULE_TIMEOUT; 150 RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); 151 152 /* update sv_maxconn if it has changed */ 153 rqstp->rq_server->sv_maxconn = nlm_max_connections; 154 155 if (signalled()) { 156 flush_signals(current); 157 restart_grace(); 158 continue; 159 } 160 161 timeout = nlmsvc_retry_blocked(); 162 163 /* 164 * Find a socket with data available and call its 165 * recvfrom routine. 166 */ 167 err = svc_recv(rqstp, timeout); 168 if (err == -EAGAIN || err == -EINTR) 169 continue; 170 dprintk("lockd: request from %s\n", 171 svc_print_addr(rqstp, buf, sizeof(buf))); 172 173 svc_process(rqstp); 174 } 175 flush_signals(current); 176 if (nlmsvc_ops) 177 nlmsvc_invalidate_all(); 178 nlm_shutdown_hosts(); 179 return 0; 180 } 181 182 static int create_lockd_listener(struct svc_serv *serv, const char *name, 183 struct net *net, const int family, 184 const unsigned short port) 185 { 186 struct svc_xprt *xprt; 187 188 xprt = svc_find_xprt(serv, name, net, family, 0); 189 if (xprt == NULL) 190 return svc_create_xprt(serv, name, net, family, port, 191 SVC_SOCK_DEFAULTS); 192 svc_xprt_put(xprt); 193 return 0; 194 } 195 196 static int create_lockd_family(struct svc_serv *serv, struct net *net, 197 const int family) 198 { 199 int err; 200 201 err = create_lockd_listener(serv, "udp", net, family, nlm_udpport); 202 if (err < 0) 203 return err; 204 205 return create_lockd_listener(serv, "tcp", net, family, nlm_tcpport); 206 } 207 208 /* 209 * Ensure there are active UDP and TCP listeners for lockd. 210 * 211 * Even if we have only TCP NFS mounts and/or TCP NFSDs, some 212 * local services (such as rpc.statd) still require UDP, and 213 * some NFS servers do not yet support NLM over TCP. 214 * 215 * Returns zero if all listeners are available; otherwise a 216 * negative errno value is returned. 217 */ 218 static int make_socks(struct svc_serv *serv, struct net *net) 219 { 220 static int warned; 221 int err; 222 223 err = create_lockd_family(serv, net, PF_INET); 224 if (err < 0) 225 goto out_err; 226 227 err = create_lockd_family(serv, net, PF_INET6); 228 if (err < 0 && err != -EAFNOSUPPORT) 229 goto out_err; 230 231 warned = 0; 232 return 0; 233 234 out_err: 235 if (warned++ == 0) 236 printk(KERN_WARNING 237 "lockd_up: makesock failed, error=%d\n", err); 238 svc_shutdown_net(serv, net); 239 return err; 240 } 241 242 static int lockd_up_net(struct svc_serv *serv, struct net *net) 243 { 244 struct lockd_net *ln = net_generic(net, lockd_net_id); 245 int error; 246 247 if (ln->nlmsvc_users++) 248 return 0; 249 250 error = svc_bind(serv, net); 251 if (error) 252 goto err_bind; 253 254 error = make_socks(serv, net); 255 if (error < 0) 256 goto err_bind; 257 set_grace_period(net); 258 dprintk("lockd_up_net: per-net data created; net=%p\n", net); 259 return 0; 260 261 err_bind: 262 ln->nlmsvc_users--; 263 return error; 264 } 265 266 static void lockd_down_net(struct svc_serv *serv, struct net *net) 267 { 268 struct lockd_net *ln = net_generic(net, lockd_net_id); 269 270 if (ln->nlmsvc_users) { 271 if (--ln->nlmsvc_users == 0) { 272 nlm_shutdown_hosts_net(net); 273 cancel_delayed_work_sync(&ln->grace_period_end); 274 locks_end_grace(&ln->lockd_manager); 275 svc_shutdown_net(serv, net); 276 dprintk("lockd_down_net: per-net data destroyed; net=%p\n", net); 277 } 278 } else { 279 printk(KERN_ERR "lockd_down_net: no users! task=%p, net=%p\n", 280 nlmsvc_task, net); 281 BUG(); 282 } 283 } 284 285 static int lockd_inetaddr_event(struct notifier_block *this, 286 unsigned long event, void *ptr) 287 { 288 struct in_ifaddr *ifa = (struct in_ifaddr *)ptr; 289 struct sockaddr_in sin; 290 291 if (event != NETDEV_DOWN) 292 goto out; 293 294 if (nlmsvc_rqst) { 295 dprintk("lockd_inetaddr_event: removed %pI4\n", 296 &ifa->ifa_local); 297 sin.sin_family = AF_INET; 298 sin.sin_addr.s_addr = ifa->ifa_local; 299 svc_age_temp_xprts_now(nlmsvc_rqst->rq_server, 300 (struct sockaddr *)&sin); 301 } 302 303 out: 304 return NOTIFY_DONE; 305 } 306 307 static struct notifier_block lockd_inetaddr_notifier = { 308 .notifier_call = lockd_inetaddr_event, 309 }; 310 311 #if IS_ENABLED(CONFIG_IPV6) 312 static int lockd_inet6addr_event(struct notifier_block *this, 313 unsigned long event, void *ptr) 314 { 315 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr; 316 struct sockaddr_in6 sin6; 317 318 if (event != NETDEV_DOWN) 319 goto out; 320 321 if (nlmsvc_rqst) { 322 dprintk("lockd_inet6addr_event: removed %pI6\n", &ifa->addr); 323 sin6.sin6_family = AF_INET6; 324 sin6.sin6_addr = ifa->addr; 325 svc_age_temp_xprts_now(nlmsvc_rqst->rq_server, 326 (struct sockaddr *)&sin6); 327 } 328 329 out: 330 return NOTIFY_DONE; 331 } 332 333 static struct notifier_block lockd_inet6addr_notifier = { 334 .notifier_call = lockd_inet6addr_event, 335 }; 336 #endif 337 338 static void lockd_unregister_notifiers(void) 339 { 340 unregister_inetaddr_notifier(&lockd_inetaddr_notifier); 341 #if IS_ENABLED(CONFIG_IPV6) 342 unregister_inet6addr_notifier(&lockd_inet6addr_notifier); 343 #endif 344 } 345 346 static void lockd_svc_exit_thread(void) 347 { 348 lockd_unregister_notifiers(); 349 svc_exit_thread(nlmsvc_rqst); 350 } 351 352 static int lockd_start_svc(struct svc_serv *serv) 353 { 354 int error; 355 356 if (nlmsvc_rqst) 357 return 0; 358 359 /* 360 * Create the kernel thread and wait for it to start. 361 */ 362 nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE); 363 if (IS_ERR(nlmsvc_rqst)) { 364 error = PTR_ERR(nlmsvc_rqst); 365 printk(KERN_WARNING 366 "lockd_up: svc_rqst allocation failed, error=%d\n", 367 error); 368 goto out_rqst; 369 } 370 371 svc_sock_update_bufs(serv); 372 serv->sv_maxconn = nlm_max_connections; 373 374 nlmsvc_task = kthread_create(lockd, nlmsvc_rqst, "%s", serv->sv_name); 375 if (IS_ERR(nlmsvc_task)) { 376 error = PTR_ERR(nlmsvc_task); 377 printk(KERN_WARNING 378 "lockd_up: kthread_run failed, error=%d\n", error); 379 goto out_task; 380 } 381 nlmsvc_rqst->rq_task = nlmsvc_task; 382 wake_up_process(nlmsvc_task); 383 384 dprintk("lockd_up: service started\n"); 385 return 0; 386 387 out_task: 388 lockd_svc_exit_thread(); 389 nlmsvc_task = NULL; 390 out_rqst: 391 nlmsvc_rqst = NULL; 392 return error; 393 } 394 395 static struct svc_serv_ops lockd_sv_ops = { 396 .svo_shutdown = svc_rpcb_cleanup, 397 .svo_enqueue_xprt = svc_xprt_do_enqueue, 398 }; 399 400 static struct svc_serv *lockd_create_svc(void) 401 { 402 struct svc_serv *serv; 403 404 /* 405 * Check whether we're already up and running. 406 */ 407 if (nlmsvc_rqst) { 408 /* 409 * Note: increase service usage, because later in case of error 410 * svc_destroy() will be called. 411 */ 412 svc_get(nlmsvc_rqst->rq_server); 413 return nlmsvc_rqst->rq_server; 414 } 415 416 /* 417 * Sanity check: if there's no pid, 418 * we should be the first user ... 419 */ 420 if (nlmsvc_users) 421 printk(KERN_WARNING 422 "lockd_up: no pid, %d users??\n", nlmsvc_users); 423 424 if (!nlm_timeout) 425 nlm_timeout = LOCKD_DFLT_TIMEO; 426 nlmsvc_timeout = nlm_timeout * HZ; 427 428 serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, &lockd_sv_ops); 429 if (!serv) { 430 printk(KERN_WARNING "lockd_up: create service failed\n"); 431 return ERR_PTR(-ENOMEM); 432 } 433 register_inetaddr_notifier(&lockd_inetaddr_notifier); 434 #if IS_ENABLED(CONFIG_IPV6) 435 register_inet6addr_notifier(&lockd_inet6addr_notifier); 436 #endif 437 dprintk("lockd_up: service created\n"); 438 return serv; 439 } 440 441 /* 442 * Bring up the lockd process if it's not already up. 443 */ 444 int lockd_up(struct net *net) 445 { 446 struct svc_serv *serv; 447 int error; 448 449 mutex_lock(&nlmsvc_mutex); 450 451 serv = lockd_create_svc(); 452 if (IS_ERR(serv)) { 453 error = PTR_ERR(serv); 454 goto err_create; 455 } 456 457 error = lockd_up_net(serv, net); 458 if (error < 0) 459 goto err_net; 460 461 error = lockd_start_svc(serv); 462 if (error < 0) 463 goto err_start; 464 465 nlmsvc_users++; 466 /* 467 * Note: svc_serv structures have an initial use count of 1, 468 * so we exit through here on both success and failure. 469 */ 470 err_put: 471 svc_destroy(serv); 472 err_create: 473 mutex_unlock(&nlmsvc_mutex); 474 return error; 475 476 err_start: 477 lockd_down_net(serv, net); 478 err_net: 479 lockd_unregister_notifiers(); 480 goto err_put; 481 } 482 EXPORT_SYMBOL_GPL(lockd_up); 483 484 /* 485 * Decrement the user count and bring down lockd if we're the last. 486 */ 487 void 488 lockd_down(struct net *net) 489 { 490 mutex_lock(&nlmsvc_mutex); 491 lockd_down_net(nlmsvc_rqst->rq_server, net); 492 if (nlmsvc_users) { 493 if (--nlmsvc_users) 494 goto out; 495 } else { 496 printk(KERN_ERR "lockd_down: no users! task=%p\n", 497 nlmsvc_task); 498 BUG(); 499 } 500 501 if (!nlmsvc_task) { 502 printk(KERN_ERR "lockd_down: no lockd running.\n"); 503 BUG(); 504 } 505 kthread_stop(nlmsvc_task); 506 dprintk("lockd_down: service stopped\n"); 507 lockd_svc_exit_thread(); 508 dprintk("lockd_down: service destroyed\n"); 509 nlmsvc_task = NULL; 510 nlmsvc_rqst = NULL; 511 out: 512 mutex_unlock(&nlmsvc_mutex); 513 } 514 EXPORT_SYMBOL_GPL(lockd_down); 515 516 #ifdef CONFIG_SYSCTL 517 518 /* 519 * Sysctl parameters (same as module parameters, different interface). 520 */ 521 522 static struct ctl_table nlm_sysctls[] = { 523 { 524 .procname = "nlm_grace_period", 525 .data = &nlm_grace_period, 526 .maxlen = sizeof(unsigned long), 527 .mode = 0644, 528 .proc_handler = proc_doulongvec_minmax, 529 .extra1 = (unsigned long *) &nlm_grace_period_min, 530 .extra2 = (unsigned long *) &nlm_grace_period_max, 531 }, 532 { 533 .procname = "nlm_timeout", 534 .data = &nlm_timeout, 535 .maxlen = sizeof(unsigned long), 536 .mode = 0644, 537 .proc_handler = proc_doulongvec_minmax, 538 .extra1 = (unsigned long *) &nlm_timeout_min, 539 .extra2 = (unsigned long *) &nlm_timeout_max, 540 }, 541 { 542 .procname = "nlm_udpport", 543 .data = &nlm_udpport, 544 .maxlen = sizeof(int), 545 .mode = 0644, 546 .proc_handler = proc_dointvec_minmax, 547 .extra1 = (int *) &nlm_port_min, 548 .extra2 = (int *) &nlm_port_max, 549 }, 550 { 551 .procname = "nlm_tcpport", 552 .data = &nlm_tcpport, 553 .maxlen = sizeof(int), 554 .mode = 0644, 555 .proc_handler = proc_dointvec_minmax, 556 .extra1 = (int *) &nlm_port_min, 557 .extra2 = (int *) &nlm_port_max, 558 }, 559 { 560 .procname = "nsm_use_hostnames", 561 .data = &nsm_use_hostnames, 562 .maxlen = sizeof(int), 563 .mode = 0644, 564 .proc_handler = proc_dointvec, 565 }, 566 { 567 .procname = "nsm_local_state", 568 .data = &nsm_local_state, 569 .maxlen = sizeof(int), 570 .mode = 0644, 571 .proc_handler = proc_dointvec, 572 }, 573 { } 574 }; 575 576 static struct ctl_table nlm_sysctl_dir[] = { 577 { 578 .procname = "nfs", 579 .mode = 0555, 580 .child = nlm_sysctls, 581 }, 582 { } 583 }; 584 585 static struct ctl_table nlm_sysctl_root[] = { 586 { 587 .procname = "fs", 588 .mode = 0555, 589 .child = nlm_sysctl_dir, 590 }, 591 { } 592 }; 593 594 #endif /* CONFIG_SYSCTL */ 595 596 /* 597 * Module (and sysfs) parameters. 598 */ 599 600 #define param_set_min_max(name, type, which_strtol, min, max) \ 601 static int param_set_##name(const char *val, struct kernel_param *kp) \ 602 { \ 603 char *endp; \ 604 __typeof__(type) num = which_strtol(val, &endp, 0); \ 605 if (endp == val || *endp || num < (min) || num > (max)) \ 606 return -EINVAL; \ 607 *((type *) kp->arg) = num; \ 608 return 0; \ 609 } 610 611 static inline int is_callback(u32 proc) 612 { 613 return proc == NLMPROC_GRANTED 614 || proc == NLMPROC_GRANTED_MSG 615 || proc == NLMPROC_TEST_RES 616 || proc == NLMPROC_LOCK_RES 617 || proc == NLMPROC_CANCEL_RES 618 || proc == NLMPROC_UNLOCK_RES 619 || proc == NLMPROC_NSM_NOTIFY; 620 } 621 622 623 static int lockd_authenticate(struct svc_rqst *rqstp) 624 { 625 rqstp->rq_client = NULL; 626 switch (rqstp->rq_authop->flavour) { 627 case RPC_AUTH_NULL: 628 case RPC_AUTH_UNIX: 629 if (rqstp->rq_proc == 0) 630 return SVC_OK; 631 if (is_callback(rqstp->rq_proc)) { 632 /* Leave it to individual procedures to 633 * call nlmsvc_lookup_host(rqstp) 634 */ 635 return SVC_OK; 636 } 637 return svc_set_client(rqstp); 638 } 639 return SVC_DENIED; 640 } 641 642 643 param_set_min_max(port, int, simple_strtol, 0, 65535) 644 param_set_min_max(grace_period, unsigned long, simple_strtoul, 645 nlm_grace_period_min, nlm_grace_period_max) 646 param_set_min_max(timeout, unsigned long, simple_strtoul, 647 nlm_timeout_min, nlm_timeout_max) 648 649 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 650 MODULE_DESCRIPTION("NFS file locking service version " LOCKD_VERSION "."); 651 MODULE_LICENSE("GPL"); 652 653 module_param_call(nlm_grace_period, param_set_grace_period, param_get_ulong, 654 &nlm_grace_period, 0644); 655 module_param_call(nlm_timeout, param_set_timeout, param_get_ulong, 656 &nlm_timeout, 0644); 657 module_param_call(nlm_udpport, param_set_port, param_get_int, 658 &nlm_udpport, 0644); 659 module_param_call(nlm_tcpport, param_set_port, param_get_int, 660 &nlm_tcpport, 0644); 661 module_param(nsm_use_hostnames, bool, 0644); 662 module_param(nlm_max_connections, uint, 0644); 663 664 static int lockd_init_net(struct net *net) 665 { 666 struct lockd_net *ln = net_generic(net, lockd_net_id); 667 668 INIT_DELAYED_WORK(&ln->grace_period_end, grace_ender); 669 INIT_LIST_HEAD(&ln->lockd_manager.list); 670 ln->lockd_manager.block_opens = false; 671 INIT_LIST_HEAD(&ln->nsm_handles); 672 return 0; 673 } 674 675 static void lockd_exit_net(struct net *net) 676 { 677 } 678 679 static struct pernet_operations lockd_net_ops = { 680 .init = lockd_init_net, 681 .exit = lockd_exit_net, 682 .id = &lockd_net_id, 683 .size = sizeof(struct lockd_net), 684 }; 685 686 687 /* 688 * Initialising and terminating the module. 689 */ 690 691 static int __init init_nlm(void) 692 { 693 int err; 694 695 #ifdef CONFIG_SYSCTL 696 err = -ENOMEM; 697 nlm_sysctl_table = register_sysctl_table(nlm_sysctl_root); 698 if (nlm_sysctl_table == NULL) 699 goto err_sysctl; 700 #endif 701 err = register_pernet_subsys(&lockd_net_ops); 702 if (err) 703 goto err_pernet; 704 705 err = lockd_create_procfs(); 706 if (err) 707 goto err_procfs; 708 709 return 0; 710 711 err_procfs: 712 unregister_pernet_subsys(&lockd_net_ops); 713 err_pernet: 714 #ifdef CONFIG_SYSCTL 715 unregister_sysctl_table(nlm_sysctl_table); 716 err_sysctl: 717 #endif 718 return err; 719 } 720 721 static void __exit exit_nlm(void) 722 { 723 /* FIXME: delete all NLM clients */ 724 nlm_shutdown_hosts(); 725 lockd_remove_procfs(); 726 unregister_pernet_subsys(&lockd_net_ops); 727 #ifdef CONFIG_SYSCTL 728 unregister_sysctl_table(nlm_sysctl_table); 729 #endif 730 } 731 732 module_init(init_nlm); 733 module_exit(exit_nlm); 734 735 /* 736 * Define NLM program and procedures 737 */ 738 static struct svc_version nlmsvc_version1 = { 739 .vs_vers = 1, 740 .vs_nproc = 17, 741 .vs_proc = nlmsvc_procedures, 742 .vs_xdrsize = NLMSVC_XDRSIZE, 743 }; 744 static struct svc_version nlmsvc_version3 = { 745 .vs_vers = 3, 746 .vs_nproc = 24, 747 .vs_proc = nlmsvc_procedures, 748 .vs_xdrsize = NLMSVC_XDRSIZE, 749 }; 750 #ifdef CONFIG_LOCKD_V4 751 static struct svc_version nlmsvc_version4 = { 752 .vs_vers = 4, 753 .vs_nproc = 24, 754 .vs_proc = nlmsvc_procedures4, 755 .vs_xdrsize = NLMSVC_XDRSIZE, 756 }; 757 #endif 758 static struct svc_version * nlmsvc_version[] = { 759 [1] = &nlmsvc_version1, 760 [3] = &nlmsvc_version3, 761 #ifdef CONFIG_LOCKD_V4 762 [4] = &nlmsvc_version4, 763 #endif 764 }; 765 766 static struct svc_stat nlmsvc_stats; 767 768 #define NLM_NRVERS ARRAY_SIZE(nlmsvc_version) 769 static struct svc_program nlmsvc_program = { 770 .pg_prog = NLM_PROGRAM, /* program number */ 771 .pg_nvers = NLM_NRVERS, /* number of entries in nlmsvc_version */ 772 .pg_vers = nlmsvc_version, /* version table */ 773 .pg_name = "lockd", /* service name */ 774 .pg_class = "nfsd", /* share authentication with nfsd */ 775 .pg_stats = &nlmsvc_stats, /* stats table */ 776 .pg_authenticate = &lockd_authenticate /* export authentication */ 777 }; 778