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 unsigned long nlmsvc_timeout;
57
58 static void nlmsvc_request_retry(struct timer_list *tl)
59 {
60 svc_wake_up(nlmsvc_serv);
61 }
62 DEFINE_TIMER(nlmsvc_retry, nlmsvc_request_retry);
63
64 unsigned int lockd_net_id;
65
66 /*
67 * These can be set at insmod time (useful for NFS as root filesystem),
68 * and also changed through the sysctl interface. -- Jamie Lokier, Aug 2003
69 */
70 static unsigned long nlm_grace_period;
71 static unsigned long nlm_timeout = LOCKD_DFLT_TIMEO;
72 static int nlm_udpport, nlm_tcpport;
73
74 /* RLIM_NOFILE defaults to 1024. That seems like a reasonable default here. */
75 static unsigned int nlm_max_connections = 1024;
76
77 /*
78 * Constants needed for the sysctl interface.
79 */
80 static const unsigned long nlm_grace_period_min = 0;
81 static const unsigned long nlm_grace_period_max = 240;
82 static const unsigned long nlm_timeout_min = 3;
83 static const unsigned long nlm_timeout_max = 20;
84
85 #ifdef CONFIG_SYSCTL
86 static const int nlm_port_min = 0, nlm_port_max = 65535;
87 static struct ctl_table_header * nlm_sysctl_table;
88 #endif
89
90 static unsigned long get_lockd_grace_period(void)
91 {
92 /* Note: nlm_timeout should always be nonzero */
93 if (nlm_grace_period)
94 return roundup(nlm_grace_period, nlm_timeout) * HZ;
95 else
96 return nlm_timeout * 5 * HZ;
97 }
98
99 static void grace_ender(struct work_struct *grace)
100 {
101 struct delayed_work *dwork = to_delayed_work(grace);
102 struct lockd_net *ln = container_of(dwork, struct lockd_net,
103 grace_period_end);
104
105 locks_end_grace(&ln->lockd_manager);
106 }
107
108 static void set_grace_period(struct net *net)
109 {
110 unsigned long grace_period = get_lockd_grace_period();
111 struct lockd_net *ln = net_generic(net, lockd_net_id);
112
113 locks_start_grace(net, &ln->lockd_manager);
114 cancel_delayed_work_sync(&ln->grace_period_end);
115 schedule_delayed_work(&ln->grace_period_end, grace_period);
116 }
117
118 /*
119 * This is the lockd kernel thread
120 */
121 static int
122 lockd(void *vrqstp)
123 {
124 struct svc_rqst *rqstp = vrqstp;
125 struct net *net = &init_net;
126 struct lockd_net *ln = net_generic(net, lockd_net_id);
127
128 /* try_to_freeze() is called from svc_recv() */
129 set_freezable();
130
131 dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n");
132
133 /*
134 * The main request loop. We don't terminate until the last
135 * NFS mount or NFS daemon has gone away.
136 */
137 while (!svc_thread_should_stop(rqstp)) {
138 /* update sv_maxconn if it has changed */
139 rqstp->rq_server->sv_maxconn = nlm_max_connections;
140
141 nlmsvc_retry_blocked(rqstp);
142 svc_recv(rqstp);
143 }
144 if (nlmsvc_ops)
145 nlmsvc_invalidate_all();
146 nlm_shutdown_hosts();
147 cancel_delayed_work_sync(&ln->grace_period_end);
148 locks_end_grace(&ln->lockd_manager);
149
150 dprintk("lockd_down: service stopped\n");
151
152 svc_exit_thread(rqstp);
153 return 0;
154 }
155
156 static int create_lockd_listener(struct svc_serv *serv, const char *name,
157 struct net *net, const int family,
158 const unsigned short port,
159 const struct cred *cred)
160 {
161 struct svc_xprt *xprt;
162
163 xprt = svc_find_xprt(serv, name, net, family, 0);
164 if (xprt == NULL)
165 return svc_xprt_create(serv, name, net, family, port,
166 SVC_SOCK_DEFAULTS, cred);
167 svc_xprt_put(xprt);
168 return 0;
169 }
170
171 static int create_lockd_family(struct svc_serv *serv, struct net *net,
172 const int family, const struct cred *cred)
173 {
174 int err;
175
176 err = create_lockd_listener(serv, "udp", net, family, nlm_udpport,
177 cred);
178 if (err < 0)
179 return err;
180
181 return create_lockd_listener(serv, "tcp", net, family, nlm_tcpport,
182 cred);
183 }
184
185 /*
186 * Ensure there are active UDP and TCP listeners for lockd.
187 *
188 * Even if we have only TCP NFS mounts and/or TCP NFSDs, some
189 * local services (such as rpc.statd) still require UDP, and
190 * some NFS servers do not yet support NLM over TCP.
191 *
192 * Returns zero if all listeners are available; otherwise a
193 * negative errno value is returned.
194 */
195 static int make_socks(struct svc_serv *serv, struct net *net,
196 const struct cred *cred)
197 {
198 static int warned;
199 int err;
200
201 err = create_lockd_family(serv, net, PF_INET, cred);
202 if (err < 0)
203 goto out_err;
204
205 err = create_lockd_family(serv, net, PF_INET6, cred);
206 if (err < 0 && err != -EAFNOSUPPORT)
207 goto out_err;
208
209 warned = 0;
210 return 0;
211
212 out_err:
213 if (warned++ == 0)
214 printk(KERN_WARNING
215 "lockd_up: makesock failed, error=%d\n", err);
216 svc_xprt_destroy_all(serv, net);
217 svc_rpcb_cleanup(serv, net);
218 return err;
219 }
220
221 static int lockd_up_net(struct svc_serv *serv, struct net *net,
222 const struct cred *cred)
223 {
224 struct lockd_net *ln = net_generic(net, lockd_net_id);
225 int error;
226
227 if (ln->nlmsvc_users++)
228 return 0;
229
230 error = svc_bind(serv, net);
231 if (error)
232 goto err_bind;
233
234 error = make_socks(serv, net, cred);
235 if (error < 0)
236 goto err_bind;
237 set_grace_period(net);
238 dprintk("%s: per-net data created; net=%x\n", __func__, net->ns.inum);
239 return 0;
240
241 err_bind:
242 ln->nlmsvc_users--;
243 return error;
244 }
245
246 static void lockd_down_net(struct svc_serv *serv, struct net *net)
247 {
248 struct lockd_net *ln = net_generic(net, lockd_net_id);
249
250 if (ln->nlmsvc_users) {
251 if (--ln->nlmsvc_users == 0) {
252 nlm_shutdown_hosts_net(net);
253 cancel_delayed_work_sync(&ln->grace_period_end);
254 locks_end_grace(&ln->lockd_manager);
255 svc_xprt_destroy_all(serv, net);
256 svc_rpcb_cleanup(serv, net);
257 }
258 } else {
259 pr_err("%s: no users! net=%x\n",
260 __func__, net->ns.inum);
261 BUG();
262 }
263 }
264
265 static int lockd_inetaddr_event(struct notifier_block *this,
266 unsigned long event, void *ptr)
267 {
268 struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
269 struct sockaddr_in sin;
270
271 if (event != NETDEV_DOWN)
272 goto out;
273
274 if (nlmsvc_serv) {
275 dprintk("lockd_inetaddr_event: removed %pI4\n",
276 &ifa->ifa_local);
277 sin.sin_family = AF_INET;
278 sin.sin_addr.s_addr = ifa->ifa_local;
279 svc_age_temp_xprts_now(nlmsvc_serv, (struct sockaddr *)&sin);
280 }
281
282 out:
283 return NOTIFY_DONE;
284 }
285
286 static struct notifier_block lockd_inetaddr_notifier = {
287 .notifier_call = lockd_inetaddr_event,
288 };
289
290 #if IS_ENABLED(CONFIG_IPV6)
291 static int lockd_inet6addr_event(struct notifier_block *this,
292 unsigned long event, void *ptr)
293 {
294 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
295 struct sockaddr_in6 sin6;
296
297 if (event != NETDEV_DOWN)
298 goto out;
299
300 if (nlmsvc_serv) {
301 dprintk("lockd_inet6addr_event: removed %pI6\n", &ifa->addr);
302 sin6.sin6_family = AF_INET6;
303 sin6.sin6_addr = ifa->addr;
304 if (ipv6_addr_type(&sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL)
305 sin6.sin6_scope_id = ifa->idev->dev->ifindex;
306 svc_age_temp_xprts_now(nlmsvc_serv, (struct sockaddr *)&sin6);
307 }
308
309 out:
310 return NOTIFY_DONE;
311 }
312
313 static struct notifier_block lockd_inet6addr_notifier = {
314 .notifier_call = lockd_inet6addr_event,
315 };
316 #endif
317
318 static int lockd_get(void)
319 {
320 struct svc_serv *serv;
321 int error;
322
323 if (nlmsvc_serv) {
324 nlmsvc_users++;
325 return 0;
326 }
327
328 /*
329 * Sanity check: if there's no pid,
330 * we should be the first user ...
331 */
332 if (nlmsvc_users)
333 printk(KERN_WARNING
334 "lockd_up: no pid, %d users??\n", nlmsvc_users);
335
336 if (!nlm_timeout)
337 nlm_timeout = LOCKD_DFLT_TIMEO;
338 nlmsvc_timeout = nlm_timeout * HZ;
339
340 serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, lockd);
341 if (!serv) {
342 printk(KERN_WARNING "lockd_up: create service failed\n");
343 return -ENOMEM;
344 }
345
346 serv->sv_maxconn = nlm_max_connections;
347 error = svc_set_num_threads(serv, NULL, 1);
348 if (error < 0) {
349 svc_destroy(&serv);
350 return error;
351 }
352
353 nlmsvc_serv = serv;
354 register_inetaddr_notifier(&lockd_inetaddr_notifier);
355 #if IS_ENABLED(CONFIG_IPV6)
356 register_inet6addr_notifier(&lockd_inet6addr_notifier);
357 #endif
358 dprintk("lockd_up: service created\n");
359 nlmsvc_users++;
360 return 0;
361 }
362
363 static void lockd_put(void)
364 {
365 if (WARN(nlmsvc_users <= 0, "lockd_down: no users!\n"))
366 return;
367 if (--nlmsvc_users)
368 return;
369
370 unregister_inetaddr_notifier(&lockd_inetaddr_notifier);
371 #if IS_ENABLED(CONFIG_IPV6)
372 unregister_inet6addr_notifier(&lockd_inet6addr_notifier);
373 #endif
374
375 svc_set_num_threads(nlmsvc_serv, NULL, 0);
376 timer_delete_sync(&nlmsvc_retry);
377 svc_destroy(&nlmsvc_serv);
378 dprintk("lockd_down: service destroyed\n");
379 }
380
381 /*
382 * Bring up the lockd process if it's not already up.
383 */
384 int lockd_up(struct net *net, const struct cred *cred)
385 {
386 int error;
387
388 mutex_lock(&nlmsvc_mutex);
389
390 error = lockd_get();
391 if (error)
392 goto err;
393
394 error = lockd_up_net(nlmsvc_serv, net, cred);
395 if (error < 0) {
396 lockd_put();
397 goto err;
398 }
399
400 err:
401 mutex_unlock(&nlmsvc_mutex);
402 return error;
403 }
404 EXPORT_SYMBOL_GPL(lockd_up);
405
406 /*
407 * Decrement the user count and bring down lockd if we're the last.
408 */
409 void
410 lockd_down(struct net *net)
411 {
412 mutex_lock(&nlmsvc_mutex);
413 lockd_down_net(nlmsvc_serv, net);
414 lockd_put();
415 mutex_unlock(&nlmsvc_mutex);
416 }
417 EXPORT_SYMBOL_GPL(lockd_down);
418
419 #ifdef CONFIG_SYSCTL
420
421 /*
422 * Sysctl parameters (same as module parameters, different interface).
423 */
424
425 static struct ctl_table nlm_sysctls[] = {
426 {
427 .procname = "nlm_grace_period",
428 .data = &nlm_grace_period,
429 .maxlen = sizeof(unsigned long),
430 .mode = 0644,
431 .proc_handler = proc_doulongvec_minmax,
432 .extra1 = (unsigned long *) &nlm_grace_period_min,
433 .extra2 = (unsigned long *) &nlm_grace_period_max,
434 },
435 {
436 .procname = "nlm_timeout",
437 .data = &nlm_timeout,
438 .maxlen = sizeof(unsigned long),
439 .mode = 0644,
440 .proc_handler = proc_doulongvec_minmax,
441 .extra1 = (unsigned long *) &nlm_timeout_min,
442 .extra2 = (unsigned long *) &nlm_timeout_max,
443 },
444 {
445 .procname = "nlm_udpport",
446 .data = &nlm_udpport,
447 .maxlen = sizeof(int),
448 .mode = 0644,
449 .proc_handler = proc_dointvec_minmax,
450 .extra1 = (int *) &nlm_port_min,
451 .extra2 = (int *) &nlm_port_max,
452 },
453 {
454 .procname = "nlm_tcpport",
455 .data = &nlm_tcpport,
456 .maxlen = sizeof(int),
457 .mode = 0644,
458 .proc_handler = proc_dointvec_minmax,
459 .extra1 = (int *) &nlm_port_min,
460 .extra2 = (int *) &nlm_port_max,
461 },
462 {
463 .procname = "nsm_use_hostnames",
464 .data = &nsm_use_hostnames,
465 .maxlen = sizeof(bool),
466 .mode = 0644,
467 .proc_handler = proc_dobool,
468 },
469 {
470 .procname = "nsm_local_state",
471 .data = &nsm_local_state,
472 .maxlen = sizeof(int),
473 .mode = 0644,
474 .proc_handler = proc_dointvec,
475 },
476 };
477
478 #endif /* CONFIG_SYSCTL */
479
480 /*
481 * Module (and sysfs) parameters.
482 */
483
484 #define param_set_min_max(name, type, which_strtol, min, max) \
485 static int param_set_##name(const char *val, const struct kernel_param *kp) \
486 { \
487 char *endp; \
488 __typeof__(type) num = which_strtol(val, &endp, 0); \
489 if (endp == val || *endp || num < (min) || num > (max)) \
490 return -EINVAL; \
491 *((type *) kp->arg) = num; \
492 return 0; \
493 }
494
495 static inline int is_callback(u32 proc)
496 {
497 return proc == NLMPROC_GRANTED
498 || proc == NLMPROC_GRANTED_MSG
499 || proc == NLMPROC_TEST_RES
500 || proc == NLMPROC_LOCK_RES
501 || proc == NLMPROC_CANCEL_RES
502 || proc == NLMPROC_UNLOCK_RES
503 || proc == NLMPROC_NSM_NOTIFY;
504 }
505
506
507 static enum svc_auth_status lockd_authenticate(struct svc_rqst *rqstp)
508 {
509 rqstp->rq_client = NULL;
510 switch (rqstp->rq_authop->flavour) {
511 case RPC_AUTH_NULL:
512 case RPC_AUTH_UNIX:
513 rqstp->rq_auth_stat = rpc_auth_ok;
514 if (rqstp->rq_proc == 0)
515 return SVC_OK;
516 if (is_callback(rqstp->rq_proc)) {
517 /* Leave it to individual procedures to
518 * call nlmsvc_lookup_host(rqstp)
519 */
520 return SVC_OK;
521 }
522 return svc_set_client(rqstp);
523 }
524 rqstp->rq_auth_stat = rpc_autherr_badcred;
525 return SVC_DENIED;
526 }
527
528
529 param_set_min_max(port, int, simple_strtol, 0, 65535)
530 param_set_min_max(grace_period, unsigned long, simple_strtoul,
531 nlm_grace_period_min, nlm_grace_period_max)
532 param_set_min_max(timeout, unsigned long, simple_strtoul,
533 nlm_timeout_min, nlm_timeout_max)
534
535 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
536 MODULE_DESCRIPTION("NFS file locking service version " LOCKD_VERSION ".");
537 MODULE_LICENSE("GPL");
538
539 module_param_call(nlm_grace_period, param_set_grace_period, param_get_ulong,
540 &nlm_grace_period, 0644);
541 module_param_call(nlm_timeout, param_set_timeout, param_get_ulong,
542 &nlm_timeout, 0644);
543 module_param_call(nlm_udpport, param_set_port, param_get_int,
544 &nlm_udpport, 0644);
545 module_param_call(nlm_tcpport, param_set_port, param_get_int,
546 &nlm_tcpport, 0644);
547 module_param(nsm_use_hostnames, bool, 0644);
548 module_param(nlm_max_connections, uint, 0644);
549
550 static int lockd_init_net(struct net *net)
551 {
552 struct lockd_net *ln = net_generic(net, lockd_net_id);
553
554 INIT_DELAYED_WORK(&ln->grace_period_end, grace_ender);
555 INIT_LIST_HEAD(&ln->lockd_manager.list);
556 ln->lockd_manager.block_opens = false;
557 INIT_LIST_HEAD(&ln->nsm_handles);
558 return 0;
559 }
560
561 static void lockd_exit_net(struct net *net)
562 {
563 struct lockd_net *ln = net_generic(net, lockd_net_id);
564
565 WARN_ONCE(!list_empty(&ln->lockd_manager.list),
566 "net %x %s: lockd_manager.list is not empty\n",
567 net->ns.inum, __func__);
568 WARN_ONCE(!list_empty(&ln->nsm_handles),
569 "net %x %s: nsm_handles list is not empty\n",
570 net->ns.inum, __func__);
571 WARN_ONCE(delayed_work_pending(&ln->grace_period_end),
572 "net %x %s: grace_period_end was not cancelled\n",
573 net->ns.inum, __func__);
574 }
575
576 static struct pernet_operations lockd_net_ops = {
577 .init = lockd_init_net,
578 .exit = lockd_exit_net,
579 .id = &lockd_net_id,
580 .size = sizeof(struct lockd_net),
581 };
582
583
584 /*
585 * Initialising and terminating the module.
586 */
587
588 static int __init init_nlm(void)
589 {
590 int err;
591
592 #ifdef CONFIG_SYSCTL
593 err = -ENOMEM;
594 nlm_sysctl_table = register_sysctl("fs/nfs", nlm_sysctls);
595 if (nlm_sysctl_table == NULL)
596 goto err_sysctl;
597 #endif
598 err = register_pernet_subsys(&lockd_net_ops);
599 if (err)
600 goto err_pernet;
601
602 err = lockd_create_procfs();
603 if (err)
604 goto err_procfs;
605
606 return 0;
607
608 err_procfs:
609 unregister_pernet_subsys(&lockd_net_ops);
610 err_pernet:
611 #ifdef CONFIG_SYSCTL
612 unregister_sysctl_table(nlm_sysctl_table);
613 err_sysctl:
614 #endif
615 return err;
616 }
617
618 static void __exit exit_nlm(void)
619 {
620 /* FIXME: delete all NLM clients */
621 nlm_shutdown_hosts();
622 lockd_remove_procfs();
623 unregister_pernet_subsys(&lockd_net_ops);
624 #ifdef CONFIG_SYSCTL
625 unregister_sysctl_table(nlm_sysctl_table);
626 #endif
627 }
628
629 module_init(init_nlm);
630 module_exit(exit_nlm);
631
632 /**
633 * nlmsvc_dispatch - Process an NLM Request
634 * @rqstp: incoming request
635 *
636 * Return values:
637 * %0: Processing complete; do not send a Reply
638 * %1: Processing complete; send Reply in rqstp->rq_res
639 */
640 static int nlmsvc_dispatch(struct svc_rqst *rqstp)
641 {
642 const struct svc_procedure *procp = rqstp->rq_procinfo;
643 __be32 *statp = rqstp->rq_accept_statp;
644
645 if (!procp->pc_decode(rqstp, &rqstp->rq_arg_stream))
646 goto out_decode_err;
647
648 *statp = procp->pc_func(rqstp);
649 if (*statp == rpc_drop_reply)
650 return 0;
651 if (*statp != rpc_success)
652 return 1;
653
654 if (!procp->pc_encode(rqstp, &rqstp->rq_res_stream))
655 goto out_encode_err;
656
657 return 1;
658
659 out_decode_err:
660 *statp = rpc_garbage_args;
661 return 1;
662
663 out_encode_err:
664 *statp = rpc_system_err;
665 return 1;
666 }
667
668 /*
669 * Define NLM program and procedures
670 */
671 static DEFINE_PER_CPU_ALIGNED(unsigned long, nlmsvc_version1_count[17]);
672 static const struct svc_version nlmsvc_version1 = {
673 .vs_vers = 1,
674 .vs_nproc = 17,
675 .vs_proc = nlmsvc_procedures,
676 .vs_count = nlmsvc_version1_count,
677 .vs_dispatch = nlmsvc_dispatch,
678 .vs_xdrsize = NLMSVC_XDRSIZE,
679 };
680
681 static DEFINE_PER_CPU_ALIGNED(unsigned long,
682 nlmsvc_version3_count[ARRAY_SIZE(nlmsvc_procedures)]);
683 static const struct svc_version nlmsvc_version3 = {
684 .vs_vers = 3,
685 .vs_nproc = ARRAY_SIZE(nlmsvc_procedures),
686 .vs_proc = nlmsvc_procedures,
687 .vs_count = nlmsvc_version3_count,
688 .vs_dispatch = nlmsvc_dispatch,
689 .vs_xdrsize = NLMSVC_XDRSIZE,
690 };
691
692 #ifdef CONFIG_LOCKD_V4
693 static DEFINE_PER_CPU_ALIGNED(unsigned long,
694 nlmsvc_version4_count[ARRAY_SIZE(nlmsvc_procedures4)]);
695 static const struct svc_version nlmsvc_version4 = {
696 .vs_vers = 4,
697 .vs_nproc = ARRAY_SIZE(nlmsvc_procedures4),
698 .vs_proc = nlmsvc_procedures4,
699 .vs_count = nlmsvc_version4_count,
700 .vs_dispatch = nlmsvc_dispatch,
701 .vs_xdrsize = NLMSVC_XDRSIZE,
702 };
703 #endif
704
705 static const struct svc_version *nlmsvc_version[] = {
706 [1] = &nlmsvc_version1,
707 [3] = &nlmsvc_version3,
708 #ifdef CONFIG_LOCKD_V4
709 [4] = &nlmsvc_version4,
710 #endif
711 };
712
713 #define NLM_NRVERS ARRAY_SIZE(nlmsvc_version)
714 static struct svc_program nlmsvc_program = {
715 .pg_prog = NLM_PROGRAM, /* program number */
716 .pg_nvers = NLM_NRVERS, /* number of entries in nlmsvc_version */
717 .pg_vers = nlmsvc_version, /* version table */
718 .pg_name = "lockd", /* service name */
719 .pg_class = "nfsd", /* share authentication with nfsd */
720 .pg_authenticate = &lockd_authenticate, /* export authentication */
721 .pg_init_request = svc_generic_init_request,
722 .pg_rpcbind_set = svc_generic_rpcbind_set,
723 };
724
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