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/signal.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 unsigned 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 if (ipv6_addr_type(&sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL) 326 sin6.sin6_scope_id = ifa->idev->dev->ifindex; 327 svc_age_temp_xprts_now(nlmsvc_rqst->rq_server, 328 (struct sockaddr *)&sin6); 329 } 330 331 out: 332 return NOTIFY_DONE; 333 } 334 335 static struct notifier_block lockd_inet6addr_notifier = { 336 .notifier_call = lockd_inet6addr_event, 337 }; 338 #endif 339 340 static void lockd_unregister_notifiers(void) 341 { 342 unregister_inetaddr_notifier(&lockd_inetaddr_notifier); 343 #if IS_ENABLED(CONFIG_IPV6) 344 unregister_inet6addr_notifier(&lockd_inet6addr_notifier); 345 #endif 346 } 347 348 static void lockd_svc_exit_thread(void) 349 { 350 lockd_unregister_notifiers(); 351 svc_exit_thread(nlmsvc_rqst); 352 } 353 354 static int lockd_start_svc(struct svc_serv *serv) 355 { 356 int error; 357 358 if (nlmsvc_rqst) 359 return 0; 360 361 /* 362 * Create the kernel thread and wait for it to start. 363 */ 364 nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE); 365 if (IS_ERR(nlmsvc_rqst)) { 366 error = PTR_ERR(nlmsvc_rqst); 367 printk(KERN_WARNING 368 "lockd_up: svc_rqst allocation failed, error=%d\n", 369 error); 370 goto out_rqst; 371 } 372 373 svc_sock_update_bufs(serv); 374 serv->sv_maxconn = nlm_max_connections; 375 376 nlmsvc_task = kthread_create(lockd, nlmsvc_rqst, "%s", serv->sv_name); 377 if (IS_ERR(nlmsvc_task)) { 378 error = PTR_ERR(nlmsvc_task); 379 printk(KERN_WARNING 380 "lockd_up: kthread_run failed, error=%d\n", error); 381 goto out_task; 382 } 383 nlmsvc_rqst->rq_task = nlmsvc_task; 384 wake_up_process(nlmsvc_task); 385 386 dprintk("lockd_up: service started\n"); 387 return 0; 388 389 out_task: 390 lockd_svc_exit_thread(); 391 nlmsvc_task = NULL; 392 out_rqst: 393 nlmsvc_rqst = NULL; 394 return error; 395 } 396 397 static struct svc_serv_ops lockd_sv_ops = { 398 .svo_shutdown = svc_rpcb_cleanup, 399 .svo_enqueue_xprt = svc_xprt_do_enqueue, 400 }; 401 402 static struct svc_serv *lockd_create_svc(void) 403 { 404 struct svc_serv *serv; 405 406 /* 407 * Check whether we're already up and running. 408 */ 409 if (nlmsvc_rqst) { 410 /* 411 * Note: increase service usage, because later in case of error 412 * svc_destroy() will be called. 413 */ 414 svc_get(nlmsvc_rqst->rq_server); 415 return nlmsvc_rqst->rq_server; 416 } 417 418 /* 419 * Sanity check: if there's no pid, 420 * we should be the first user ... 421 */ 422 if (nlmsvc_users) 423 printk(KERN_WARNING 424 "lockd_up: no pid, %d users??\n", nlmsvc_users); 425 426 if (!nlm_timeout) 427 nlm_timeout = LOCKD_DFLT_TIMEO; 428 nlmsvc_timeout = nlm_timeout * HZ; 429 430 serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, &lockd_sv_ops); 431 if (!serv) { 432 printk(KERN_WARNING "lockd_up: create service failed\n"); 433 return ERR_PTR(-ENOMEM); 434 } 435 register_inetaddr_notifier(&lockd_inetaddr_notifier); 436 #if IS_ENABLED(CONFIG_IPV6) 437 register_inet6addr_notifier(&lockd_inet6addr_notifier); 438 #endif 439 dprintk("lockd_up: service created\n"); 440 return serv; 441 } 442 443 /* 444 * Bring up the lockd process if it's not already up. 445 */ 446 int lockd_up(struct net *net) 447 { 448 struct svc_serv *serv; 449 int error; 450 451 mutex_lock(&nlmsvc_mutex); 452 453 serv = lockd_create_svc(); 454 if (IS_ERR(serv)) { 455 error = PTR_ERR(serv); 456 goto err_create; 457 } 458 459 error = lockd_up_net(serv, net); 460 if (error < 0) 461 goto err_net; 462 463 error = lockd_start_svc(serv); 464 if (error < 0) 465 goto err_start; 466 467 nlmsvc_users++; 468 /* 469 * Note: svc_serv structures have an initial use count of 1, 470 * so we exit through here on both success and failure. 471 */ 472 err_put: 473 svc_destroy(serv); 474 err_create: 475 mutex_unlock(&nlmsvc_mutex); 476 return error; 477 478 err_start: 479 lockd_down_net(serv, net); 480 err_net: 481 lockd_unregister_notifiers(); 482 goto err_put; 483 } 484 EXPORT_SYMBOL_GPL(lockd_up); 485 486 /* 487 * Decrement the user count and bring down lockd if we're the last. 488 */ 489 void 490 lockd_down(struct net *net) 491 { 492 mutex_lock(&nlmsvc_mutex); 493 lockd_down_net(nlmsvc_rqst->rq_server, net); 494 if (nlmsvc_users) { 495 if (--nlmsvc_users) 496 goto out; 497 } else { 498 printk(KERN_ERR "lockd_down: no users! task=%p\n", 499 nlmsvc_task); 500 BUG(); 501 } 502 503 if (!nlmsvc_task) { 504 printk(KERN_ERR "lockd_down: no lockd running.\n"); 505 BUG(); 506 } 507 kthread_stop(nlmsvc_task); 508 dprintk("lockd_down: service stopped\n"); 509 lockd_svc_exit_thread(); 510 dprintk("lockd_down: service destroyed\n"); 511 nlmsvc_task = NULL; 512 nlmsvc_rqst = NULL; 513 out: 514 mutex_unlock(&nlmsvc_mutex); 515 } 516 EXPORT_SYMBOL_GPL(lockd_down); 517 518 #ifdef CONFIG_SYSCTL 519 520 /* 521 * Sysctl parameters (same as module parameters, different interface). 522 */ 523 524 static struct ctl_table nlm_sysctls[] = { 525 { 526 .procname = "nlm_grace_period", 527 .data = &nlm_grace_period, 528 .maxlen = sizeof(unsigned long), 529 .mode = 0644, 530 .proc_handler = proc_doulongvec_minmax, 531 .extra1 = (unsigned long *) &nlm_grace_period_min, 532 .extra2 = (unsigned long *) &nlm_grace_period_max, 533 }, 534 { 535 .procname = "nlm_timeout", 536 .data = &nlm_timeout, 537 .maxlen = sizeof(unsigned long), 538 .mode = 0644, 539 .proc_handler = proc_doulongvec_minmax, 540 .extra1 = (unsigned long *) &nlm_timeout_min, 541 .extra2 = (unsigned long *) &nlm_timeout_max, 542 }, 543 { 544 .procname = "nlm_udpport", 545 .data = &nlm_udpport, 546 .maxlen = sizeof(int), 547 .mode = 0644, 548 .proc_handler = proc_dointvec_minmax, 549 .extra1 = (int *) &nlm_port_min, 550 .extra2 = (int *) &nlm_port_max, 551 }, 552 { 553 .procname = "nlm_tcpport", 554 .data = &nlm_tcpport, 555 .maxlen = sizeof(int), 556 .mode = 0644, 557 .proc_handler = proc_dointvec_minmax, 558 .extra1 = (int *) &nlm_port_min, 559 .extra2 = (int *) &nlm_port_max, 560 }, 561 { 562 .procname = "nsm_use_hostnames", 563 .data = &nsm_use_hostnames, 564 .maxlen = sizeof(int), 565 .mode = 0644, 566 .proc_handler = proc_dointvec, 567 }, 568 { 569 .procname = "nsm_local_state", 570 .data = &nsm_local_state, 571 .maxlen = sizeof(int), 572 .mode = 0644, 573 .proc_handler = proc_dointvec, 574 }, 575 { } 576 }; 577 578 static struct ctl_table nlm_sysctl_dir[] = { 579 { 580 .procname = "nfs", 581 .mode = 0555, 582 .child = nlm_sysctls, 583 }, 584 { } 585 }; 586 587 static struct ctl_table nlm_sysctl_root[] = { 588 { 589 .procname = "fs", 590 .mode = 0555, 591 .child = nlm_sysctl_dir, 592 }, 593 { } 594 }; 595 596 #endif /* CONFIG_SYSCTL */ 597 598 /* 599 * Module (and sysfs) parameters. 600 */ 601 602 #define param_set_min_max(name, type, which_strtol, min, max) \ 603 static int param_set_##name(const char *val, struct kernel_param *kp) \ 604 { \ 605 char *endp; \ 606 __typeof__(type) num = which_strtol(val, &endp, 0); \ 607 if (endp == val || *endp || num < (min) || num > (max)) \ 608 return -EINVAL; \ 609 *((type *) kp->arg) = num; \ 610 return 0; \ 611 } 612 613 static inline int is_callback(u32 proc) 614 { 615 return proc == NLMPROC_GRANTED 616 || proc == NLMPROC_GRANTED_MSG 617 || proc == NLMPROC_TEST_RES 618 || proc == NLMPROC_LOCK_RES 619 || proc == NLMPROC_CANCEL_RES 620 || proc == NLMPROC_UNLOCK_RES 621 || proc == NLMPROC_NSM_NOTIFY; 622 } 623 624 625 static int lockd_authenticate(struct svc_rqst *rqstp) 626 { 627 rqstp->rq_client = NULL; 628 switch (rqstp->rq_authop->flavour) { 629 case RPC_AUTH_NULL: 630 case RPC_AUTH_UNIX: 631 if (rqstp->rq_proc == 0) 632 return SVC_OK; 633 if (is_callback(rqstp->rq_proc)) { 634 /* Leave it to individual procedures to 635 * call nlmsvc_lookup_host(rqstp) 636 */ 637 return SVC_OK; 638 } 639 return svc_set_client(rqstp); 640 } 641 return SVC_DENIED; 642 } 643 644 645 param_set_min_max(port, int, simple_strtol, 0, 65535) 646 param_set_min_max(grace_period, unsigned long, simple_strtoul, 647 nlm_grace_period_min, nlm_grace_period_max) 648 param_set_min_max(timeout, unsigned long, simple_strtoul, 649 nlm_timeout_min, nlm_timeout_max) 650 651 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 652 MODULE_DESCRIPTION("NFS file locking service version " LOCKD_VERSION "."); 653 MODULE_LICENSE("GPL"); 654 655 module_param_call(nlm_grace_period, param_set_grace_period, param_get_ulong, 656 &nlm_grace_period, 0644); 657 module_param_call(nlm_timeout, param_set_timeout, param_get_ulong, 658 &nlm_timeout, 0644); 659 module_param_call(nlm_udpport, param_set_port, param_get_int, 660 &nlm_udpport, 0644); 661 module_param_call(nlm_tcpport, param_set_port, param_get_int, 662 &nlm_tcpport, 0644); 663 module_param(nsm_use_hostnames, bool, 0644); 664 module_param(nlm_max_connections, uint, 0644); 665 666 static int lockd_init_net(struct net *net) 667 { 668 struct lockd_net *ln = net_generic(net, lockd_net_id); 669 670 INIT_DELAYED_WORK(&ln->grace_period_end, grace_ender); 671 INIT_LIST_HEAD(&ln->lockd_manager.list); 672 ln->lockd_manager.block_opens = false; 673 INIT_LIST_HEAD(&ln->nsm_handles); 674 return 0; 675 } 676 677 static void lockd_exit_net(struct net *net) 678 { 679 } 680 681 static struct pernet_operations lockd_net_ops = { 682 .init = lockd_init_net, 683 .exit = lockd_exit_net, 684 .id = &lockd_net_id, 685 .size = sizeof(struct lockd_net), 686 }; 687 688 689 /* 690 * Initialising and terminating the module. 691 */ 692 693 static int __init init_nlm(void) 694 { 695 int err; 696 697 #ifdef CONFIG_SYSCTL 698 err = -ENOMEM; 699 nlm_sysctl_table = register_sysctl_table(nlm_sysctl_root); 700 if (nlm_sysctl_table == NULL) 701 goto err_sysctl; 702 #endif 703 err = register_pernet_subsys(&lockd_net_ops); 704 if (err) 705 goto err_pernet; 706 707 err = lockd_create_procfs(); 708 if (err) 709 goto err_procfs; 710 711 return 0; 712 713 err_procfs: 714 unregister_pernet_subsys(&lockd_net_ops); 715 err_pernet: 716 #ifdef CONFIG_SYSCTL 717 unregister_sysctl_table(nlm_sysctl_table); 718 err_sysctl: 719 #endif 720 return err; 721 } 722 723 static void __exit exit_nlm(void) 724 { 725 /* FIXME: delete all NLM clients */ 726 nlm_shutdown_hosts(); 727 lockd_remove_procfs(); 728 unregister_pernet_subsys(&lockd_net_ops); 729 #ifdef CONFIG_SYSCTL 730 unregister_sysctl_table(nlm_sysctl_table); 731 #endif 732 } 733 734 module_init(init_nlm); 735 module_exit(exit_nlm); 736 737 /* 738 * Define NLM program and procedures 739 */ 740 static struct svc_version nlmsvc_version1 = { 741 .vs_vers = 1, 742 .vs_nproc = 17, 743 .vs_proc = nlmsvc_procedures, 744 .vs_xdrsize = NLMSVC_XDRSIZE, 745 }; 746 static struct svc_version nlmsvc_version3 = { 747 .vs_vers = 3, 748 .vs_nproc = 24, 749 .vs_proc = nlmsvc_procedures, 750 .vs_xdrsize = NLMSVC_XDRSIZE, 751 }; 752 #ifdef CONFIG_LOCKD_V4 753 static struct svc_version nlmsvc_version4 = { 754 .vs_vers = 4, 755 .vs_nproc = 24, 756 .vs_proc = nlmsvc_procedures4, 757 .vs_xdrsize = NLMSVC_XDRSIZE, 758 }; 759 #endif 760 static struct svc_version * nlmsvc_version[] = { 761 [1] = &nlmsvc_version1, 762 [3] = &nlmsvc_version3, 763 #ifdef CONFIG_LOCKD_V4 764 [4] = &nlmsvc_version4, 765 #endif 766 }; 767 768 static struct svc_stat nlmsvc_stats; 769 770 #define NLM_NRVERS ARRAY_SIZE(nlmsvc_version) 771 static struct svc_program nlmsvc_program = { 772 .pg_prog = NLM_PROGRAM, /* program number */ 773 .pg_nvers = NLM_NRVERS, /* number of entries in nlmsvc_version */ 774 .pg_vers = nlmsvc_version, /* version table */ 775 .pg_name = "lockd", /* service name */ 776 .pg_class = "nfsd", /* share authentication with nfsd */ 777 .pg_stats = &nlmsvc_stats, /* stats table */ 778 .pg_authenticate = &lockd_authenticate /* export authentication */ 779 }; 780