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
nlmsvc_request_retry(struct timer_list * tl)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
get_lockd_grace_period(void)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
grace_ender(struct work_struct * grace)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
set_grace_period(struct net * net)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
lockd(void * vrqstp)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
create_lockd_listener(struct svc_serv * serv,const char * name,struct net * net,const int family,const unsigned short port,const struct cred * cred)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
create_lockd_family(struct svc_serv * serv,struct net * net,const int family,const struct cred * cred)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 */
make_socks(struct svc_serv * serv,struct net * net,const struct cred * cred)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
lockd_up_net(struct svc_serv * serv,struct net * net,const struct cred * cred)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
lockd_down_net(struct svc_serv * serv,struct net * net)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
lockd_inetaddr_event(struct notifier_block * this,unsigned long event,void * ptr)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)
lockd_inet6addr_event(struct notifier_block * this,unsigned long event,void * ptr)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
lockd_get(void)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
lockd_put(void)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 */
lockd_up(struct net * net,const struct cred * cred)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
lockd_down(struct net * net)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
is_callback(u32 proc)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
lockd_authenticate(struct svc_rqst * rqstp)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
lockd_init_net(struct net * net)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
lockd_exit_net(struct net * net)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
init_nlm(void)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
exit_nlm(void)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 */
nlmsvc_dispatch(struct svc_rqst * rqstp)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