1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/fs/lockd/svc.c 4 * 5 * This is the central lockd service. 6 * 7 * FIXME: Separate the lockd NFS server functionality from the lockd NFS 8 * client functionality. Oh why didn't Sun create two separate 9 * services in the first place? 10 * 11 * Authors: Olaf Kirch (okir@monad.swb.de) 12 * 13 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> 14 */ 15 16 #include <linux/module.h> 17 #include <linux/init.h> 18 #include <linux/sysctl.h> 19 #include <linux/moduleparam.h> 20 21 #include <linux/sched/signal.h> 22 #include <linux/errno.h> 23 #include <linux/in.h> 24 #include <linux/uio.h> 25 #include <linux/smp.h> 26 #include <linux/mutex.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 48 static struct svc_program nlmsvc_program; 49 50 const struct nlmsvc_binding *nlmsvc_ops; 51 EXPORT_SYMBOL_GPL(nlmsvc_ops); 52 53 static DEFINE_MUTEX(nlmsvc_mutex); 54 static unsigned int nlmsvc_users; 55 static struct svc_serv *nlmsvc_serv; 56 57 static void nlmsvc_request_retry(struct timer_list *tl) 58 { 59 svc_wake_up(nlmsvc_serv); 60 } 61 DEFINE_TIMER(nlmsvc_retry, nlmsvc_request_retry); 62 63 unsigned int lockd_net_id; 64 65 /* 66 * These can be set at insmod time (useful for NFS as root filesystem), 67 * and also changed through the sysctl interface. -- Jamie Lokier, Aug 2003 68 */ 69 static unsigned long nlm_grace_period; 70 unsigned long nlm_timeout = LOCKD_DFLT_TIMEO; 71 static int nlm_udpport, nlm_tcpport; 72 73 /* RLIM_NOFILE defaults to 1024. That seems like a reasonable default here. */ 74 static unsigned int nlm_max_connections = 1024; 75 76 /* 77 * Constants needed for the sysctl interface. 78 */ 79 static const unsigned long nlm_grace_period_min = 0; 80 static const unsigned long nlm_grace_period_max = 240; 81 static const unsigned long nlm_timeout_min = 3; 82 static const unsigned long nlm_timeout_max = 20; 83 84 #ifdef CONFIG_SYSCTL 85 static const int nlm_port_min = 0, nlm_port_max = 65535; 86 static struct ctl_table_header * nlm_sysctl_table; 87 #endif 88 89 static unsigned long get_lockd_grace_period(void) 90 { 91 /* Note: nlm_timeout should always be nonzero */ 92 if (nlm_grace_period) 93 return roundup(nlm_grace_period, nlm_timeout) * HZ; 94 else 95 return nlm_timeout * 5 * HZ; 96 } 97 98 static void grace_ender(struct work_struct *grace) 99 { 100 struct delayed_work *dwork = to_delayed_work(grace); 101 struct lockd_net *ln = container_of(dwork, struct lockd_net, 102 grace_period_end); 103 104 locks_end_grace(&ln->lockd_manager); 105 } 106 107 static void set_grace_period(struct net *net) 108 { 109 unsigned long grace_period = get_lockd_grace_period(); 110 struct lockd_net *ln = net_generic(net, lockd_net_id); 111 112 locks_start_grace(net, &ln->lockd_manager); 113 cancel_delayed_work_sync(&ln->grace_period_end); 114 schedule_delayed_work(&ln->grace_period_end, grace_period); 115 } 116 117 /* 118 * This is the lockd kernel thread 119 */ 120 static int 121 lockd(void *vrqstp) 122 { 123 struct svc_rqst *rqstp = vrqstp; 124 struct net *net = &init_net; 125 struct lockd_net *ln = net_generic(net, lockd_net_id); 126 127 svc_thread_init_status(rqstp, 0); 128 129 /* try_to_freeze() is called from svc_recv() */ 130 set_freezable(); 131 132 dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n"); 133 134 /* 135 * The main request loop. We don't terminate until the last 136 * NFS mount or NFS daemon has gone away. 137 */ 138 while (!svc_thread_should_stop(rqstp)) { 139 /* update sv_maxconn if it has changed */ 140 rqstp->rq_server->sv_maxconn = nlm_max_connections; 141 142 nlmsvc_retry_blocked(rqstp); 143 svc_recv(rqstp); 144 } 145 if (nlmsvc_ops) 146 nlmsvc_invalidate_all(); 147 nlm_shutdown_hosts(); 148 cancel_delayed_work_sync(&ln->grace_period_end); 149 locks_end_grace(&ln->lockd_manager); 150 151 dprintk("lockd_down: service stopped\n"); 152 153 svc_exit_thread(rqstp); 154 return 0; 155 } 156 157 static int create_lockd_listener(struct svc_serv *serv, const char *name, 158 struct net *net, const int family, 159 const unsigned short port, 160 const struct cred *cred) 161 { 162 struct svc_xprt *xprt; 163 164 xprt = svc_find_xprt(serv, name, net, family, 0); 165 if (xprt == NULL) 166 return svc_xprt_create(serv, name, net, family, port, 167 SVC_SOCK_DEFAULTS, cred); 168 svc_xprt_put(xprt); 169 return 0; 170 } 171 172 static int create_lockd_family(struct svc_serv *serv, struct net *net, 173 const int family, const struct cred *cred) 174 { 175 int err; 176 177 err = create_lockd_listener(serv, "udp", net, family, nlm_udpport, 178 cred); 179 if (err < 0) 180 return err; 181 182 return create_lockd_listener(serv, "tcp", net, family, nlm_tcpport, 183 cred); 184 } 185 186 /* 187 * Ensure there are active UDP and TCP listeners for lockd. 188 * 189 * Even if we have only TCP NFS mounts and/or TCP NFSDs, some 190 * local services (such as rpc.statd) still require UDP, and 191 * some NFS servers do not yet support NLM over TCP. 192 * 193 * Returns zero if all listeners are available; otherwise a 194 * negative errno value is returned. 195 */ 196 static int make_socks(struct svc_serv *serv, struct net *net, 197 const struct cred *cred) 198 { 199 static int warned; 200 int err; 201 202 err = create_lockd_family(serv, net, PF_INET, cred); 203 if (err < 0) 204 goto out_err; 205 206 err = create_lockd_family(serv, net, PF_INET6, cred); 207 if (err < 0 && err != -EAFNOSUPPORT) 208 goto out_err; 209 210 warned = 0; 211 return 0; 212 213 out_err: 214 if (warned++ == 0) 215 printk(KERN_WARNING 216 "lockd_up: makesock failed, error=%d\n", err); 217 svc_xprt_destroy_all(serv, net); 218 svc_rpcb_cleanup(serv, net); 219 return err; 220 } 221 222 static int lockd_up_net(struct svc_serv *serv, struct net *net, 223 const struct cred *cred) 224 { 225 struct lockd_net *ln = net_generic(net, lockd_net_id); 226 int error; 227 228 if (ln->nlmsvc_users++) 229 return 0; 230 231 error = svc_bind(serv, net); 232 if (error) 233 goto err_bind; 234 235 error = make_socks(serv, net, cred); 236 if (error < 0) 237 goto err_bind; 238 set_grace_period(net); 239 dprintk("%s: per-net data created; net=%x\n", __func__, net->ns.inum); 240 return 0; 241 242 err_bind: 243 ln->nlmsvc_users--; 244 return error; 245 } 246 247 static void lockd_down_net(struct svc_serv *serv, struct net *net) 248 { 249 struct lockd_net *ln = net_generic(net, lockd_net_id); 250 251 if (ln->nlmsvc_users) { 252 if (--ln->nlmsvc_users == 0) { 253 nlm_shutdown_hosts_net(net); 254 cancel_delayed_work_sync(&ln->grace_period_end); 255 locks_end_grace(&ln->lockd_manager); 256 svc_xprt_destroy_all(serv, net); 257 svc_rpcb_cleanup(serv, net); 258 } 259 } else { 260 pr_err("%s: no users! net=%x\n", 261 __func__, net->ns.inum); 262 BUG(); 263 } 264 } 265 266 static int lockd_inetaddr_event(struct notifier_block *this, 267 unsigned long event, void *ptr) 268 { 269 struct in_ifaddr *ifa = (struct in_ifaddr *)ptr; 270 struct sockaddr_in sin; 271 272 if (event != NETDEV_DOWN) 273 goto out; 274 275 if (nlmsvc_serv) { 276 dprintk("lockd_inetaddr_event: removed %pI4\n", 277 &ifa->ifa_local); 278 sin.sin_family = AF_INET; 279 sin.sin_addr.s_addr = ifa->ifa_local; 280 svc_age_temp_xprts_now(nlmsvc_serv, (struct sockaddr *)&sin); 281 } 282 283 out: 284 return NOTIFY_DONE; 285 } 286 287 static struct notifier_block lockd_inetaddr_notifier = { 288 .notifier_call = lockd_inetaddr_event, 289 }; 290 291 #if IS_ENABLED(CONFIG_IPV6) 292 static int lockd_inet6addr_event(struct notifier_block *this, 293 unsigned long event, void *ptr) 294 { 295 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr; 296 struct sockaddr_in6 sin6; 297 298 if (event != NETDEV_DOWN) 299 goto out; 300 301 if (nlmsvc_serv) { 302 dprintk("lockd_inet6addr_event: removed %pI6\n", &ifa->addr); 303 sin6.sin6_family = AF_INET6; 304 sin6.sin6_addr = ifa->addr; 305 if (ipv6_addr_type(&sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL) 306 sin6.sin6_scope_id = ifa->idev->dev->ifindex; 307 svc_age_temp_xprts_now(nlmsvc_serv, (struct sockaddr *)&sin6); 308 } 309 310 out: 311 return NOTIFY_DONE; 312 } 313 314 static struct notifier_block lockd_inet6addr_notifier = { 315 .notifier_call = lockd_inet6addr_event, 316 }; 317 #endif 318 319 static int lockd_get(void) 320 { 321 struct svc_serv *serv; 322 int error; 323 324 if (nlmsvc_serv) { 325 nlmsvc_users++; 326 return 0; 327 } 328 329 /* 330 * Sanity check: if there's no pid, 331 * we should be the first user ... 332 */ 333 if (nlmsvc_users) 334 printk(KERN_WARNING 335 "lockd_up: no pid, %d users??\n", nlmsvc_users); 336 337 serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, lockd); 338 if (!serv) { 339 printk(KERN_WARNING "lockd_up: create service failed\n"); 340 return -ENOMEM; 341 } 342 343 serv->sv_maxconn = nlm_max_connections; 344 error = svc_set_num_threads(serv, NULL, 1); 345 if (error < 0) { 346 svc_destroy(&serv); 347 return error; 348 } 349 350 nlmsvc_serv = serv; 351 register_inetaddr_notifier(&lockd_inetaddr_notifier); 352 #if IS_ENABLED(CONFIG_IPV6) 353 register_inet6addr_notifier(&lockd_inet6addr_notifier); 354 #endif 355 dprintk("lockd_up: service created\n"); 356 nlmsvc_users++; 357 return 0; 358 } 359 360 static void lockd_put(void) 361 { 362 if (WARN(nlmsvc_users <= 0, "lockd_down: no users!\n")) 363 return; 364 if (--nlmsvc_users) 365 return; 366 367 unregister_inetaddr_notifier(&lockd_inetaddr_notifier); 368 #if IS_ENABLED(CONFIG_IPV6) 369 unregister_inet6addr_notifier(&lockd_inet6addr_notifier); 370 #endif 371 372 svc_set_num_threads(nlmsvc_serv, NULL, 0); 373 timer_delete_sync(&nlmsvc_retry); 374 svc_destroy(&nlmsvc_serv); 375 dprintk("lockd_down: service destroyed\n"); 376 } 377 378 /* 379 * Bring up the lockd process if it's not already up. 380 */ 381 int lockd_up(struct net *net, const struct cred *cred) 382 { 383 int error; 384 385 mutex_lock(&nlmsvc_mutex); 386 387 error = lockd_get(); 388 if (error) 389 goto err; 390 391 error = lockd_up_net(nlmsvc_serv, net, cred); 392 if (error < 0) { 393 lockd_put(); 394 goto err; 395 } 396 397 err: 398 mutex_unlock(&nlmsvc_mutex); 399 return error; 400 } 401 EXPORT_SYMBOL_GPL(lockd_up); 402 403 /* 404 * Decrement the user count and bring down lockd if we're the last. 405 */ 406 void 407 lockd_down(struct net *net) 408 { 409 mutex_lock(&nlmsvc_mutex); 410 lockd_down_net(nlmsvc_serv, net); 411 lockd_put(); 412 mutex_unlock(&nlmsvc_mutex); 413 } 414 EXPORT_SYMBOL_GPL(lockd_down); 415 416 #ifdef CONFIG_SYSCTL 417 418 /* 419 * Sysctl parameters (same as module parameters, different interface). 420 */ 421 422 static struct ctl_table nlm_sysctls[] = { 423 { 424 .procname = "nlm_grace_period", 425 .data = &nlm_grace_period, 426 .maxlen = sizeof(unsigned long), 427 .mode = 0644, 428 .proc_handler = proc_doulongvec_minmax, 429 .extra1 = (unsigned long *) &nlm_grace_period_min, 430 .extra2 = (unsigned long *) &nlm_grace_period_max, 431 }, 432 { 433 .procname = "nlm_timeout", 434 .data = &nlm_timeout, 435 .maxlen = sizeof(unsigned long), 436 .mode = 0644, 437 .proc_handler = proc_doulongvec_minmax, 438 .extra1 = (unsigned long *) &nlm_timeout_min, 439 .extra2 = (unsigned long *) &nlm_timeout_max, 440 }, 441 { 442 .procname = "nlm_udpport", 443 .data = &nlm_udpport, 444 .maxlen = sizeof(int), 445 .mode = 0644, 446 .proc_handler = proc_dointvec_minmax, 447 .extra1 = (int *) &nlm_port_min, 448 .extra2 = (int *) &nlm_port_max, 449 }, 450 { 451 .procname = "nlm_tcpport", 452 .data = &nlm_tcpport, 453 .maxlen = sizeof(int), 454 .mode = 0644, 455 .proc_handler = proc_dointvec_minmax, 456 .extra1 = (int *) &nlm_port_min, 457 .extra2 = (int *) &nlm_port_max, 458 }, 459 { 460 .procname = "nsm_use_hostnames", 461 .data = &nsm_use_hostnames, 462 .maxlen = sizeof(bool), 463 .mode = 0644, 464 .proc_handler = proc_dobool, 465 }, 466 { 467 .procname = "nsm_local_state", 468 .data = &nsm_local_state, 469 .maxlen = sizeof(int), 470 .mode = 0644, 471 .proc_handler = proc_dointvec, 472 }, 473 }; 474 475 #endif /* CONFIG_SYSCTL */ 476 477 /* 478 * Module (and sysfs) parameters. 479 */ 480 481 #define param_set_min_max(name, type, which_strtol, min, max) \ 482 static int param_set_##name(const char *val, const struct kernel_param *kp) \ 483 { \ 484 char *endp; \ 485 __typeof__(type) num = which_strtol(val, &endp, 0); \ 486 if (endp == val || *endp || num < (min) || num > (max)) \ 487 return -EINVAL; \ 488 *((type *) kp->arg) = num; \ 489 return 0; \ 490 } 491 492 static inline int is_callback(u32 proc) 493 { 494 return proc == NLMPROC_GRANTED 495 || proc == NLMPROC_GRANTED_MSG 496 || proc == NLMPROC_TEST_RES 497 || proc == NLMPROC_LOCK_RES 498 || proc == NLMPROC_CANCEL_RES 499 || proc == NLMPROC_UNLOCK_RES 500 || proc == NLMPROC_NSM_NOTIFY; 501 } 502 503 504 static enum svc_auth_status lockd_authenticate(struct svc_rqst *rqstp) 505 { 506 rqstp->rq_client = NULL; 507 switch (rqstp->rq_authop->flavour) { 508 case RPC_AUTH_NULL: 509 case RPC_AUTH_UNIX: 510 rqstp->rq_auth_stat = rpc_auth_ok; 511 if (rqstp->rq_proc == 0) 512 return SVC_OK; 513 if (is_callback(rqstp->rq_proc)) { 514 /* Leave it to individual procedures to 515 * call nlmsvc_lookup_host(rqstp) 516 */ 517 return SVC_OK; 518 } 519 return svc_set_client(rqstp); 520 } 521 rqstp->rq_auth_stat = rpc_autherr_badcred; 522 return SVC_DENIED; 523 } 524 525 526 param_set_min_max(port, int, simple_strtol, 0, 65535) 527 param_set_min_max(grace_period, unsigned long, simple_strtoul, 528 nlm_grace_period_min, nlm_grace_period_max) 529 param_set_min_max(timeout, unsigned long, simple_strtoul, 530 nlm_timeout_min, nlm_timeout_max) 531 532 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 533 MODULE_DESCRIPTION("NFS file locking service version " LOCKD_VERSION "."); 534 MODULE_LICENSE("GPL"); 535 536 module_param_call(nlm_grace_period, param_set_grace_period, param_get_ulong, 537 &nlm_grace_period, 0644); 538 module_param_call(nlm_timeout, param_set_timeout, param_get_ulong, 539 &nlm_timeout, 0644); 540 module_param_call(nlm_udpport, param_set_port, param_get_int, 541 &nlm_udpport, 0644); 542 module_param_call(nlm_tcpport, param_set_port, param_get_int, 543 &nlm_tcpport, 0644); 544 module_param(nsm_use_hostnames, bool, 0644); 545 module_param(nlm_max_connections, uint, 0644); 546 547 static int lockd_init_net(struct net *net) 548 { 549 struct lockd_net *ln = net_generic(net, lockd_net_id); 550 551 INIT_DELAYED_WORK(&ln->grace_period_end, grace_ender); 552 INIT_LIST_HEAD(&ln->lockd_manager.list); 553 ln->lockd_manager.block_opens = false; 554 INIT_LIST_HEAD(&ln->nsm_handles); 555 return 0; 556 } 557 558 static void lockd_exit_net(struct net *net) 559 { 560 struct lockd_net *ln = net_generic(net, lockd_net_id); 561 562 WARN_ONCE(!list_empty(&ln->lockd_manager.list), 563 "net %x %s: lockd_manager.list is not empty\n", 564 net->ns.inum, __func__); 565 WARN_ONCE(!list_empty(&ln->nsm_handles), 566 "net %x %s: nsm_handles list is not empty\n", 567 net->ns.inum, __func__); 568 WARN_ONCE(delayed_work_pending(&ln->grace_period_end), 569 "net %x %s: grace_period_end was not cancelled\n", 570 net->ns.inum, __func__); 571 } 572 573 static struct pernet_operations lockd_net_ops = { 574 .init = lockd_init_net, 575 .exit = lockd_exit_net, 576 .id = &lockd_net_id, 577 .size = sizeof(struct lockd_net), 578 }; 579 580 581 /* 582 * Initialising and terminating the module. 583 */ 584 585 static int __init init_nlm(void) 586 { 587 int err; 588 589 #ifdef CONFIG_SYSCTL 590 err = -ENOMEM; 591 nlm_sysctl_table = register_sysctl("fs/nfs", nlm_sysctls); 592 if (nlm_sysctl_table == NULL) 593 goto err_sysctl; 594 #endif 595 err = register_pernet_subsys(&lockd_net_ops); 596 if (err) 597 goto err_pernet; 598 599 err = lockd_create_procfs(); 600 if (err) 601 goto err_procfs; 602 603 return 0; 604 605 err_procfs: 606 unregister_pernet_subsys(&lockd_net_ops); 607 err_pernet: 608 #ifdef CONFIG_SYSCTL 609 unregister_sysctl_table(nlm_sysctl_table); 610 err_sysctl: 611 #endif 612 return err; 613 } 614 615 static void __exit exit_nlm(void) 616 { 617 /* FIXME: delete all NLM clients */ 618 nlm_shutdown_hosts(); 619 lockd_remove_procfs(); 620 unregister_pernet_subsys(&lockd_net_ops); 621 #ifdef CONFIG_SYSCTL 622 unregister_sysctl_table(nlm_sysctl_table); 623 #endif 624 } 625 626 module_init(init_nlm); 627 module_exit(exit_nlm); 628 629 /** 630 * nlmsvc_dispatch - Process an NLM Request 631 * @rqstp: incoming request 632 * 633 * Return values: 634 * %0: Processing complete; do not send a Reply 635 * %1: Processing complete; send Reply in rqstp->rq_res 636 */ 637 static int nlmsvc_dispatch(struct svc_rqst *rqstp) 638 { 639 const struct svc_procedure *procp = rqstp->rq_procinfo; 640 __be32 *statp = rqstp->rq_accept_statp; 641 642 if (!procp->pc_decode(rqstp, &rqstp->rq_arg_stream)) 643 goto out_decode_err; 644 645 *statp = procp->pc_func(rqstp); 646 if (*statp == rpc_drop_reply) 647 return 0; 648 if (*statp != rpc_success) 649 return 1; 650 651 if (!procp->pc_encode(rqstp, &rqstp->rq_res_stream)) 652 goto out_encode_err; 653 654 return 1; 655 656 out_decode_err: 657 *statp = rpc_garbage_args; 658 return 1; 659 660 out_encode_err: 661 *statp = rpc_system_err; 662 return 1; 663 } 664 665 /* 666 * Define NLM program and procedures 667 */ 668 static DEFINE_PER_CPU_ALIGNED(unsigned long, nlmsvc_version1_count[17]); 669 static const struct svc_version nlmsvc_version1 = { 670 .vs_vers = 1, 671 .vs_nproc = 17, 672 .vs_proc = nlmsvc_procedures, 673 .vs_count = nlmsvc_version1_count, 674 .vs_dispatch = nlmsvc_dispatch, 675 .vs_xdrsize = NLMSVC_XDRSIZE, 676 }; 677 678 static DEFINE_PER_CPU_ALIGNED(unsigned long, 679 nlmsvc_version3_count[ARRAY_SIZE(nlmsvc_procedures)]); 680 static const struct svc_version nlmsvc_version3 = { 681 .vs_vers = 3, 682 .vs_nproc = ARRAY_SIZE(nlmsvc_procedures), 683 .vs_proc = nlmsvc_procedures, 684 .vs_count = nlmsvc_version3_count, 685 .vs_dispatch = nlmsvc_dispatch, 686 .vs_xdrsize = NLMSVC_XDRSIZE, 687 }; 688 689 #ifdef CONFIG_LOCKD_V4 690 static DEFINE_PER_CPU_ALIGNED(unsigned long, 691 nlmsvc_version4_count[ARRAY_SIZE(nlmsvc_procedures4)]); 692 static const struct svc_version nlmsvc_version4 = { 693 .vs_vers = 4, 694 .vs_nproc = ARRAY_SIZE(nlmsvc_procedures4), 695 .vs_proc = nlmsvc_procedures4, 696 .vs_count = nlmsvc_version4_count, 697 .vs_dispatch = nlmsvc_dispatch, 698 .vs_xdrsize = NLMSVC_XDRSIZE, 699 }; 700 #endif 701 702 static const struct svc_version *nlmsvc_version[] = { 703 [1] = &nlmsvc_version1, 704 [3] = &nlmsvc_version3, 705 #ifdef CONFIG_LOCKD_V4 706 [4] = &nlmsvc_version4, 707 #endif 708 }; 709 710 #define NLM_NRVERS ARRAY_SIZE(nlmsvc_version) 711 static struct svc_program nlmsvc_program = { 712 .pg_prog = NLM_PROGRAM, /* program number */ 713 .pg_nvers = NLM_NRVERS, /* number of entries in nlmsvc_version */ 714 .pg_vers = nlmsvc_version, /* version table */ 715 .pg_name = "lockd", /* service name */ 716 .pg_class = "nfsd", /* share authentication with nfsd */ 717 .pg_authenticate = &lockd_authenticate, /* export authentication */ 718 .pg_init_request = svc_generic_init_request, 719 .pg_rpcbind_set = svc_generic_rpcbind_set, 720 }; 721