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/kthread.h>
28 #include <linux/freezer.h>
29 #include <linux/inetdevice.h>
30
31 #include <linux/sunrpc/types.h>
32 #include <linux/sunrpc/stats.h>
33 #include <linux/sunrpc/clnt.h>
34 #include <linux/sunrpc/svc.h>
35 #include <linux/sunrpc/svcsock.h>
36 #include <linux/sunrpc/svc_xprt.h>
37 #include <net/ip.h>
38 #include <net/addrconf.h>
39 #include <net/ipv6.h>
40 #include <linux/lockd/lockd.h>
41 #include <linux/nfs.h>
42
43 #include "netns.h"
44 #include "procfs.h"
45
46 #define NLMDBG_FACILITY NLMDBG_SVC
47 #define LOCKD_BUFSIZE (1024 + NLMSVC_XDRSIZE)
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 svc_serv *nlmsvc_serv;
57 unsigned long nlmsvc_timeout;
58
nlmsvc_request_retry(struct timer_list * tl)59 static void nlmsvc_request_retry(struct timer_list *tl)
60 {
61 svc_wake_up(nlmsvc_serv);
62 }
63 DEFINE_TIMER(nlmsvc_retry, nlmsvc_request_retry);
64
65 unsigned int lockd_net_id;
66
67 /*
68 * These can be set at insmod time (useful for NFS as root filesystem),
69 * and also changed through the sysctl interface. -- Jamie Lokier, Aug 2003
70 */
71 static unsigned long nlm_grace_period;
72 static unsigned long nlm_timeout = LOCKD_DFLT_TIMEO;
73 static int nlm_udpport, nlm_tcpport;
74
75 /* RLIM_NOFILE defaults to 1024. That seems like a reasonable default here. */
76 static unsigned int nlm_max_connections = 1024;
77
78 /*
79 * Constants needed for the sysctl interface.
80 */
81 static const unsigned long nlm_grace_period_min = 0;
82 static const unsigned long nlm_grace_period_max = 240;
83 static const unsigned long nlm_timeout_min = 3;
84 static const unsigned long nlm_timeout_max = 20;
85
86 #ifdef CONFIG_SYSCTL
87 static const int nlm_port_min = 0, nlm_port_max = 65535;
88 static struct ctl_table_header * nlm_sysctl_table;
89 #endif
90
get_lockd_grace_period(void)91 static unsigned long get_lockd_grace_period(void)
92 {
93 /* Note: nlm_timeout should always be nonzero */
94 if (nlm_grace_period)
95 return roundup(nlm_grace_period, nlm_timeout) * HZ;
96 else
97 return nlm_timeout * 5 * HZ;
98 }
99
grace_ender(struct work_struct * grace)100 static void grace_ender(struct work_struct *grace)
101 {
102 struct delayed_work *dwork = to_delayed_work(grace);
103 struct lockd_net *ln = container_of(dwork, struct lockd_net,
104 grace_period_end);
105
106 locks_end_grace(&ln->lockd_manager);
107 }
108
set_grace_period(struct net * net)109 static void set_grace_period(struct net *net)
110 {
111 unsigned long grace_period = get_lockd_grace_period();
112 struct lockd_net *ln = net_generic(net, lockd_net_id);
113
114 locks_start_grace(net, &ln->lockd_manager);
115 cancel_delayed_work_sync(&ln->grace_period_end);
116 schedule_delayed_work(&ln->grace_period_end, grace_period);
117 }
118
119 /*
120 * This is the lockd kernel thread
121 */
122 static int
lockd(void * vrqstp)123 lockd(void *vrqstp)
124 {
125 struct svc_rqst *rqstp = vrqstp;
126 struct net *net = &init_net;
127 struct lockd_net *ln = net_generic(net, lockd_net_id);
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 (!kthread_should_stop()) {
139 /* update sv_maxconn if it has changed */
140 rqstp->rq_server->sv_maxconn = nlm_max_connections;
141
142 nlmsvc_retry_blocked();
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 if (!nlm_timeout)
338 nlm_timeout = LOCKD_DFLT_TIMEO;
339 nlmsvc_timeout = nlm_timeout * HZ;
340
341 serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, lockd);
342 if (!serv) {
343 printk(KERN_WARNING "lockd_up: create service failed\n");
344 return -ENOMEM;
345 }
346
347 serv->sv_maxconn = nlm_max_connections;
348 error = svc_set_num_threads(serv, NULL, 1);
349 /* The thread now holds the only reference */
350 svc_put(serv);
351 if (error < 0)
352 return error;
353
354 nlmsvc_serv = serv;
355 register_inetaddr_notifier(&lockd_inetaddr_notifier);
356 #if IS_ENABLED(CONFIG_IPV6)
357 register_inet6addr_notifier(&lockd_inet6addr_notifier);
358 #endif
359 dprintk("lockd_up: service created\n");
360 nlmsvc_users++;
361 return 0;
362 }
363
lockd_put(void)364 static void lockd_put(void)
365 {
366 if (WARN(nlmsvc_users <= 0, "lockd_down: no users!\n"))
367 return;
368 if (--nlmsvc_users)
369 return;
370
371 unregister_inetaddr_notifier(&lockd_inetaddr_notifier);
372 #if IS_ENABLED(CONFIG_IPV6)
373 unregister_inet6addr_notifier(&lockd_inet6addr_notifier);
374 #endif
375
376 svc_set_num_threads(nlmsvc_serv, NULL, 0);
377 timer_delete_sync(&nlmsvc_retry);
378 nlmsvc_serv = NULL;
379 dprintk("lockd_down: service destroyed\n");
380 }
381
382 /*
383 * Bring up the lockd process if it's not already up.
384 */
lockd_up(struct net * net,const struct cred * cred)385 int lockd_up(struct net *net, const struct cred *cred)
386 {
387 int error;
388
389 mutex_lock(&nlmsvc_mutex);
390
391 error = lockd_get();
392 if (error)
393 goto err;
394
395 error = lockd_up_net(nlmsvc_serv, net, cred);
396 if (error < 0) {
397 lockd_put();
398 goto err;
399 }
400
401 err:
402 mutex_unlock(&nlmsvc_mutex);
403 return error;
404 }
405 EXPORT_SYMBOL_GPL(lockd_up);
406
407 /*
408 * Decrement the user count and bring down lockd if we're the last.
409 */
410 void
lockd_down(struct net * net)411 lockd_down(struct net *net)
412 {
413 mutex_lock(&nlmsvc_mutex);
414 lockd_down_net(nlmsvc_serv, net);
415 lockd_put();
416 mutex_unlock(&nlmsvc_mutex);
417 }
418 EXPORT_SYMBOL_GPL(lockd_down);
419
420 #ifdef CONFIG_SYSCTL
421
422 /*
423 * Sysctl parameters (same as module parameters, different interface).
424 */
425
426 static struct ctl_table nlm_sysctls[] = {
427 {
428 .procname = "nlm_grace_period",
429 .data = &nlm_grace_period,
430 .maxlen = sizeof(unsigned long),
431 .mode = 0644,
432 .proc_handler = proc_doulongvec_minmax,
433 .extra1 = (unsigned long *) &nlm_grace_period_min,
434 .extra2 = (unsigned long *) &nlm_grace_period_max,
435 },
436 {
437 .procname = "nlm_timeout",
438 .data = &nlm_timeout,
439 .maxlen = sizeof(unsigned long),
440 .mode = 0644,
441 .proc_handler = proc_doulongvec_minmax,
442 .extra1 = (unsigned long *) &nlm_timeout_min,
443 .extra2 = (unsigned long *) &nlm_timeout_max,
444 },
445 {
446 .procname = "nlm_udpport",
447 .data = &nlm_udpport,
448 .maxlen = sizeof(int),
449 .mode = 0644,
450 .proc_handler = proc_dointvec_minmax,
451 .extra1 = (int *) &nlm_port_min,
452 .extra2 = (int *) &nlm_port_max,
453 },
454 {
455 .procname = "nlm_tcpport",
456 .data = &nlm_tcpport,
457 .maxlen = sizeof(int),
458 .mode = 0644,
459 .proc_handler = proc_dointvec_minmax,
460 .extra1 = (int *) &nlm_port_min,
461 .extra2 = (int *) &nlm_port_max,
462 },
463 {
464 .procname = "nsm_use_hostnames",
465 .data = &nsm_use_hostnames,
466 .maxlen = sizeof(bool),
467 .mode = 0644,
468 .proc_handler = proc_dobool,
469 },
470 {
471 .procname = "nsm_local_state",
472 .data = &nsm_local_state,
473 .maxlen = sizeof(int),
474 .mode = 0644,
475 .proc_handler = proc_dointvec,
476 },
477 { }
478 };
479
480 #endif /* CONFIG_SYSCTL */
481
482 /*
483 * Module (and sysfs) parameters.
484 */
485
486 #define param_set_min_max(name, type, which_strtol, min, max) \
487 static int param_set_##name(const char *val, const struct kernel_param *kp) \
488 { \
489 char *endp; \
490 __typeof__(type) num = which_strtol(val, &endp, 0); \
491 if (endp == val || *endp || num < (min) || num > (max)) \
492 return -EINVAL; \
493 *((type *) kp->arg) = num; \
494 return 0; \
495 }
496
is_callback(u32 proc)497 static inline int is_callback(u32 proc)
498 {
499 return proc == NLMPROC_GRANTED
500 || proc == NLMPROC_GRANTED_MSG
501 || proc == NLMPROC_TEST_RES
502 || proc == NLMPROC_LOCK_RES
503 || proc == NLMPROC_CANCEL_RES
504 || proc == NLMPROC_UNLOCK_RES
505 || proc == NLMPROC_NSM_NOTIFY;
506 }
507
508
lockd_authenticate(struct svc_rqst * rqstp)509 static enum svc_auth_status lockd_authenticate(struct svc_rqst *rqstp)
510 {
511 rqstp->rq_client = NULL;
512 switch (rqstp->rq_authop->flavour) {
513 case RPC_AUTH_NULL:
514 case RPC_AUTH_UNIX:
515 rqstp->rq_auth_stat = rpc_auth_ok;
516 if (rqstp->rq_proc == 0)
517 return SVC_OK;
518 if (is_callback(rqstp->rq_proc)) {
519 /* Leave it to individual procedures to
520 * call nlmsvc_lookup_host(rqstp)
521 */
522 return SVC_OK;
523 }
524 return svc_set_client(rqstp);
525 }
526 rqstp->rq_auth_stat = rpc_autherr_badcred;
527 return SVC_DENIED;
528 }
529
530
531 param_set_min_max(port, int, simple_strtol, 0, 65535)
532 param_set_min_max(grace_period, unsigned long, simple_strtoul,
533 nlm_grace_period_min, nlm_grace_period_max)
534 param_set_min_max(timeout, unsigned long, simple_strtoul,
535 nlm_timeout_min, nlm_timeout_max)
536
537 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
538 MODULE_DESCRIPTION("NFS file locking service version " LOCKD_VERSION ".");
539 MODULE_LICENSE("GPL");
540
541 module_param_call(nlm_grace_period, param_set_grace_period, param_get_ulong,
542 &nlm_grace_period, 0644);
543 module_param_call(nlm_timeout, param_set_timeout, param_get_ulong,
544 &nlm_timeout, 0644);
545 module_param_call(nlm_udpport, param_set_port, param_get_int,
546 &nlm_udpport, 0644);
547 module_param_call(nlm_tcpport, param_set_port, param_get_int,
548 &nlm_tcpport, 0644);
549 module_param(nsm_use_hostnames, bool, 0644);
550 module_param(nlm_max_connections, uint, 0644);
551
lockd_init_net(struct net * net)552 static int lockd_init_net(struct net *net)
553 {
554 struct lockd_net *ln = net_generic(net, lockd_net_id);
555
556 INIT_DELAYED_WORK(&ln->grace_period_end, grace_ender);
557 INIT_LIST_HEAD(&ln->lockd_manager.list);
558 ln->lockd_manager.block_opens = false;
559 INIT_LIST_HEAD(&ln->nsm_handles);
560 return 0;
561 }
562
lockd_exit_net(struct net * net)563 static void lockd_exit_net(struct net *net)
564 {
565 struct lockd_net *ln = net_generic(net, lockd_net_id);
566
567 WARN_ONCE(!list_empty(&ln->lockd_manager.list),
568 "net %x %s: lockd_manager.list is not empty\n",
569 net->ns.inum, __func__);
570 WARN_ONCE(!list_empty(&ln->nsm_handles),
571 "net %x %s: nsm_handles list is not empty\n",
572 net->ns.inum, __func__);
573 WARN_ONCE(delayed_work_pending(&ln->grace_period_end),
574 "net %x %s: grace_period_end was not cancelled\n",
575 net->ns.inum, __func__);
576 }
577
578 static struct pernet_operations lockd_net_ops = {
579 .init = lockd_init_net,
580 .exit = lockd_exit_net,
581 .id = &lockd_net_id,
582 .size = sizeof(struct lockd_net),
583 };
584
585
586 /*
587 * Initialising and terminating the module.
588 */
589
init_nlm(void)590 static int __init init_nlm(void)
591 {
592 int err;
593
594 #ifdef CONFIG_SYSCTL
595 err = -ENOMEM;
596 nlm_sysctl_table = register_sysctl("fs/nfs", nlm_sysctls);
597 if (nlm_sysctl_table == NULL)
598 goto err_sysctl;
599 #endif
600 err = register_pernet_subsys(&lockd_net_ops);
601 if (err)
602 goto err_pernet;
603
604 err = lockd_create_procfs();
605 if (err)
606 goto err_procfs;
607
608 return 0;
609
610 err_procfs:
611 unregister_pernet_subsys(&lockd_net_ops);
612 err_pernet:
613 #ifdef CONFIG_SYSCTL
614 unregister_sysctl_table(nlm_sysctl_table);
615 err_sysctl:
616 #endif
617 return err;
618 }
619
exit_nlm(void)620 static void __exit exit_nlm(void)
621 {
622 /* FIXME: delete all NLM clients */
623 nlm_shutdown_hosts();
624 lockd_remove_procfs();
625 unregister_pernet_subsys(&lockd_net_ops);
626 #ifdef CONFIG_SYSCTL
627 unregister_sysctl_table(nlm_sysctl_table);
628 #endif
629 }
630
631 module_init(init_nlm);
632 module_exit(exit_nlm);
633
634 /**
635 * nlmsvc_dispatch - Process an NLM Request
636 * @rqstp: incoming request
637 *
638 * Return values:
639 * %0: Processing complete; do not send a Reply
640 * %1: Processing complete; send Reply in rqstp->rq_res
641 */
nlmsvc_dispatch(struct svc_rqst * rqstp)642 static int nlmsvc_dispatch(struct svc_rqst *rqstp)
643 {
644 const struct svc_procedure *procp = rqstp->rq_procinfo;
645 __be32 *statp = rqstp->rq_accept_statp;
646
647 if (!procp->pc_decode(rqstp, &rqstp->rq_arg_stream))
648 goto out_decode_err;
649
650 *statp = procp->pc_func(rqstp);
651 if (*statp == rpc_drop_reply)
652 return 0;
653 if (*statp != rpc_success)
654 return 1;
655
656 if (!procp->pc_encode(rqstp, &rqstp->rq_res_stream))
657 goto out_encode_err;
658
659 return 1;
660
661 out_decode_err:
662 *statp = rpc_garbage_args;
663 return 1;
664
665 out_encode_err:
666 *statp = rpc_system_err;
667 return 1;
668 }
669
670 /*
671 * Define NLM program and procedures
672 */
673 static DEFINE_PER_CPU_ALIGNED(unsigned long, nlmsvc_version1_count[17]);
674 static const struct svc_version nlmsvc_version1 = {
675 .vs_vers = 1,
676 .vs_nproc = 17,
677 .vs_proc = nlmsvc_procedures,
678 .vs_count = nlmsvc_version1_count,
679 .vs_dispatch = nlmsvc_dispatch,
680 .vs_xdrsize = NLMSVC_XDRSIZE,
681 };
682
683 static DEFINE_PER_CPU_ALIGNED(unsigned long,
684 nlmsvc_version3_count[ARRAY_SIZE(nlmsvc_procedures)]);
685 static const struct svc_version nlmsvc_version3 = {
686 .vs_vers = 3,
687 .vs_nproc = ARRAY_SIZE(nlmsvc_procedures),
688 .vs_proc = nlmsvc_procedures,
689 .vs_count = nlmsvc_version3_count,
690 .vs_dispatch = nlmsvc_dispatch,
691 .vs_xdrsize = NLMSVC_XDRSIZE,
692 };
693
694 #ifdef CONFIG_LOCKD_V4
695 static DEFINE_PER_CPU_ALIGNED(unsigned long,
696 nlmsvc_version4_count[ARRAY_SIZE(nlmsvc_procedures4)]);
697 static const struct svc_version nlmsvc_version4 = {
698 .vs_vers = 4,
699 .vs_nproc = ARRAY_SIZE(nlmsvc_procedures4),
700 .vs_proc = nlmsvc_procedures4,
701 .vs_count = nlmsvc_version4_count,
702 .vs_dispatch = nlmsvc_dispatch,
703 .vs_xdrsize = NLMSVC_XDRSIZE,
704 };
705 #endif
706
707 static const struct svc_version *nlmsvc_version[] = {
708 [1] = &nlmsvc_version1,
709 [3] = &nlmsvc_version3,
710 #ifdef CONFIG_LOCKD_V4
711 [4] = &nlmsvc_version4,
712 #endif
713 };
714
715 static struct svc_stat nlmsvc_stats;
716
717 #define NLM_NRVERS ARRAY_SIZE(nlmsvc_version)
718 static struct svc_program nlmsvc_program = {
719 .pg_prog = NLM_PROGRAM, /* program number */
720 .pg_nvers = NLM_NRVERS, /* number of entries in nlmsvc_version */
721 .pg_vers = nlmsvc_version, /* version table */
722 .pg_name = "lockd", /* service name */
723 .pg_class = "nfsd", /* share authentication with nfsd */
724 .pg_stats = &nlmsvc_stats, /* stats table */
725 .pg_authenticate = &lockd_authenticate, /* export authentication */
726 .pg_init_request = svc_generic_init_request,
727 .pg_rpcbind_set = svc_generic_rpcbind_set,
728 };
729
