blob: 126b1bf02c0ec2d8b5c051eb1e29acf27d6a32b3 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/module.h>
16#include <linux/init.h>
17#include <linux/sysctl.h>
18#include <linux/moduleparam.h>
19
20#include <linux/sched.h>
21#include <linux/errno.h>
22#include <linux/in.h>
23#include <linux/uio.h>
24#include <linux/slab.h>
25#include <linux/smp.h>
26#include <linux/smp_lock.h>
Ingo Molnar353ab6e2006-03-26 01:37:12 -080027#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
29#include <linux/sunrpc/types.h>
30#include <linux/sunrpc/stats.h>
31#include <linux/sunrpc/clnt.h>
32#include <linux/sunrpc/svc.h>
33#include <linux/sunrpc/svcsock.h>
NeilBrown24e36662006-10-02 02:17:45 -070034#include <net/ip.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <linux/lockd/lockd.h>
Olaf Kirch460f5ca2006-10-04 02:16:03 -070036#include <linux/lockd/sm_inter.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <linux/nfs.h>
38
39#define NLMDBG_FACILITY NLMDBG_SVC
40#define LOCKD_BUFSIZE (1024 + NLMSVC_XDRSIZE)
41#define ALLOWED_SIGS (sigmask(SIGKILL))
42
43static struct svc_program nlmsvc_program;
44
45struct nlmsvc_binding * nlmsvc_ops;
46EXPORT_SYMBOL(nlmsvc_ops);
47
Ingo Molnar353ab6e2006-03-26 01:37:12 -080048static DEFINE_MUTEX(nlmsvc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070049static unsigned int nlmsvc_users;
50static pid_t nlmsvc_pid;
NeilBrown24e36662006-10-02 02:17:45 -070051static struct svc_serv *nlmsvc_serv;
Linus Torvalds1da177e2005-04-16 15:20:36 -070052int nlmsvc_grace_period;
53unsigned long nlmsvc_timeout;
54
Ingo Molnar353ab6e2006-03-26 01:37:12 -080055static DECLARE_COMPLETION(lockd_start_done);
Linus Torvalds1da177e2005-04-16 15:20:36 -070056static DECLARE_WAIT_QUEUE_HEAD(lockd_exit);
57
58/*
59 * These can be set at insmod time (useful for NFS as root filesystem),
60 * and also changed through the sysctl interface. -- Jamie Lokier, Aug 2003
61 */
62static unsigned long nlm_grace_period;
63static unsigned long nlm_timeout = LOCKD_DFLT_TIMEO;
64static int nlm_udpport, nlm_tcpport;
Olaf Kirchabd1f502006-10-04 02:16:01 -070065int nsm_use_hostnames = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
67/*
68 * Constants needed for the sysctl interface.
69 */
70static const unsigned long nlm_grace_period_min = 0;
71static const unsigned long nlm_grace_period_max = 240;
72static const unsigned long nlm_timeout_min = 3;
73static const unsigned long nlm_timeout_max = 20;
74static const int nlm_port_min = 0, nlm_port_max = 65535;
75
76static struct ctl_table_header * nlm_sysctl_table;
77
78static unsigned long set_grace_period(void)
79{
80 unsigned long grace_period;
81
82 /* Note: nlm_timeout should always be nonzero */
83 if (nlm_grace_period)
84 grace_period = ((nlm_grace_period + nlm_timeout - 1)
85 / nlm_timeout) * nlm_timeout * HZ;
86 else
87 grace_period = nlm_timeout * 5 * HZ;
88 nlmsvc_grace_period = 1;
89 return grace_period + jiffies;
90}
91
92static inline void clear_grace_period(void)
93{
94 nlmsvc_grace_period = 0;
95}
96
97/*
98 * This is the lockd kernel thread
99 */
100static void
101lockd(struct svc_rqst *rqstp)
102{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 int err = 0;
104 unsigned long grace_period_expire;
105
106 /* Lock module and set up kernel thread */
107 /* lockd_up is waiting for us to startup, so will
108 * be holding a reference to this module, so it
109 * is safe to just claim another reference
110 */
111 __module_get(THIS_MODULE);
112 lock_kernel();
113
114 /*
115 * Let our maker know we're running.
116 */
117 nlmsvc_pid = current->pid;
NeilBrown6fb2b472006-10-02 02:17:50 -0700118 nlmsvc_serv = rqstp->rq_server;
Ingo Molnar353ab6e2006-03-26 01:37:12 -0800119 complete(&lockd_start_done);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
121 daemonize("lockd");
122
123 /* Process request with signals blocked, but allow SIGKILL. */
124 allow_signal(SIGKILL);
125
126 /* kick rpciod */
127 rpciod_up();
128
129 dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n");
130
131 if (!nlm_timeout)
132 nlm_timeout = LOCKD_DFLT_TIMEO;
133 nlmsvc_timeout = nlm_timeout * HZ;
134
135 grace_period_expire = set_grace_period();
136
137 /*
138 * The main request loop. We don't terminate until the last
139 * NFS mount or NFS daemon has gone away, and we've been sent a
140 * signal, or else another process has taken over our job.
141 */
142 while ((nlmsvc_users || !signalled()) && nlmsvc_pid == current->pid) {
143 long timeout = MAX_SCHEDULE_TIMEOUT;
Chuck Leverad06e4b2007-02-12 00:53:32 -0800144 char buf[RPC_MAX_ADDRBUFLEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
146 if (signalled()) {
147 flush_signals(current);
148 if (nlmsvc_ops) {
149 nlmsvc_invalidate_all();
150 grace_period_expire = set_grace_period();
151 }
152 }
153
154 /*
155 * Retry any blocked locks that have been notified by
156 * the VFS. Don't do this during grace period.
157 * (Theoretically, there shouldn't even be blocked locks
158 * during grace period).
159 */
160 if (!nlmsvc_grace_period) {
161 timeout = nlmsvc_retry_blocked();
162 } else if (time_before(grace_period_expire, jiffies))
163 clear_grace_period();
164
165 /*
166 * Find a socket with data available and call its
167 * recvfrom routine.
168 */
NeilBrown6fb2b472006-10-02 02:17:50 -0700169 err = svc_recv(rqstp, timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 if (err == -EAGAIN || err == -EINTR)
171 continue;
172 if (err < 0) {
173 printk(KERN_WARNING
174 "lockd: terminating on error %d\n",
175 -err);
176 break;
177 }
178
Chuck Leverad06e4b2007-02-12 00:53:32 -0800179 dprintk("lockd: request from %s\n",
180 svc_print_addr(rqstp, buf, sizeof(buf)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
NeilBrown6fb2b472006-10-02 02:17:50 -0700182 svc_process(rqstp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 }
184
Trond Myklebust2bd61572006-01-03 09:55:19 +0100185 flush_signals(current);
186
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 /*
188 * Check whether there's a new lockd process before
189 * shutting down the hosts and clearing the slot.
190 */
191 if (!nlmsvc_pid || current->pid == nlmsvc_pid) {
192 if (nlmsvc_ops)
193 nlmsvc_invalidate_all();
194 nlm_shutdown_hosts();
195 nlmsvc_pid = 0;
NeilBrown24e36662006-10-02 02:17:45 -0700196 nlmsvc_serv = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 } else
198 printk(KERN_DEBUG
199 "lockd: new process, skipping host shutdown\n");
200 wake_up(&lockd_exit);
NeilBrown46be9252005-06-23 22:03:11 -0700201
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 /* Exit the RPC thread */
203 svc_exit_thread(rqstp);
204
205 /* release rpciod */
206 rpciod_down();
207
208 /* Release module */
209 unlock_kernel();
210 module_put_and_exit(0);
211}
212
NeilBrown24e36662006-10-02 02:17:45 -0700213
214static int find_socket(struct svc_serv *serv, int proto)
215{
216 struct svc_sock *svsk;
217 int found = 0;
218 list_for_each_entry(svsk, &serv->sv_permsocks, sk_list)
219 if (svsk->sk_sk->sk_protocol == proto) {
220 found = 1;
221 break;
222 }
223 return found;
224}
225
Chuck Lever482fb942007-02-12 00:53:29 -0800226/*
227 * Make any sockets that are needed but not present.
228 * If nlm_udpport or nlm_tcpport were set as module
229 * options, make those sockets unconditionally
230 */
NeilBrown24e36662006-10-02 02:17:45 -0700231static int make_socks(struct svc_serv *serv, int proto)
232{
Chuck Lever482fb942007-02-12 00:53:29 -0800233 static int warned;
NeilBrown24e36662006-10-02 02:17:45 -0700234 int err = 0;
Chuck Lever482fb942007-02-12 00:53:29 -0800235
NeilBrown24e36662006-10-02 02:17:45 -0700236 if (proto == IPPROTO_UDP || nlm_udpport)
237 if (!find_socket(serv, IPPROTO_UDP))
Chuck Lever482fb942007-02-12 00:53:29 -0800238 err = svc_makesock(serv, IPPROTO_UDP, nlm_udpport,
239 SVC_SOCK_DEFAULTS);
240 if (err >= 0 && (proto == IPPROTO_TCP || nlm_tcpport))
NeilBrown24e36662006-10-02 02:17:45 -0700241 if (!find_socket(serv, IPPROTO_TCP))
Chuck Lever482fb942007-02-12 00:53:29 -0800242 err = svc_makesock(serv, IPPROTO_TCP, nlm_tcpport,
243 SVC_SOCK_DEFAULTS);
244
245 if (err >= 0) {
NeilBrown7dcf91e2006-10-02 02:17:52 -0700246 warned = 0;
Chuck Lever482fb942007-02-12 00:53:29 -0800247 err = 0;
248 } else if (warned++ == 0)
NeilBrown7dcf91e2006-10-02 02:17:52 -0700249 printk(KERN_WARNING
250 "lockd_up: makesock failed, error=%d\n", err);
NeilBrown24e36662006-10-02 02:17:45 -0700251 return err;
252}
253
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254/*
255 * Bring up the lockd process if it's not already up.
256 */
257int
NeilBrown24e36662006-10-02 02:17:45 -0700258lockd_up(int proto) /* Maybe add a 'family' option when IPv6 is supported ?? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 struct svc_serv * serv;
261 int error = 0;
262
Ingo Molnar353ab6e2006-03-26 01:37:12 -0800263 mutex_lock(&nlmsvc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 * Check whether we're already up and running.
266 */
NeilBrown24e36662006-10-02 02:17:45 -0700267 if (nlmsvc_pid) {
NeilBrown4a3ae422006-10-02 02:17:53 -0700268 if (proto)
269 error = make_socks(nlmsvc_serv, proto);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 goto out;
NeilBrown24e36662006-10-02 02:17:45 -0700271 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
273 /*
274 * Sanity check: if there's no pid,
275 * we should be the first user ...
276 */
NeilBrown4a3ae422006-10-02 02:17:53 -0700277 if (nlmsvc_users)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 printk(KERN_WARNING
279 "lockd_up: no pid, %d users??\n", nlmsvc_users);
280
281 error = -ENOMEM;
NeilBrownbc591cc2006-10-02 02:17:44 -0700282 serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 if (!serv) {
284 printk(KERN_WARNING "lockd_up: create service failed\n");
285 goto out;
286 }
287
NeilBrown7dcf91e2006-10-02 02:17:52 -0700288 if ((error = make_socks(serv, proto)) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 goto destroy_and_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290
291 /*
292 * Create the kernel thread and wait for it to start.
293 */
294 error = svc_create_thread(lockd, serv);
295 if (error) {
296 printk(KERN_WARNING
297 "lockd_up: create thread failed, error=%d\n", error);
298 goto destroy_and_out;
299 }
Ingo Molnar353ab6e2006-03-26 01:37:12 -0800300 wait_for_completion(&lockd_start_done);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301
302 /*
303 * Note: svc_serv structures have an initial use count of 1,
304 * so we exit through here on both success and failure.
305 */
306destroy_and_out:
307 svc_destroy(serv);
308out:
NeilBrown4a3ae422006-10-02 02:17:53 -0700309 if (!error)
310 nlmsvc_users++;
Ingo Molnar353ab6e2006-03-26 01:37:12 -0800311 mutex_unlock(&nlmsvc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 return error;
313}
314EXPORT_SYMBOL(lockd_up);
315
316/*
317 * Decrement the user count and bring down lockd if we're the last.
318 */
319void
320lockd_down(void)
321{
322 static int warned;
323
Ingo Molnar353ab6e2006-03-26 01:37:12 -0800324 mutex_lock(&nlmsvc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 if (nlmsvc_users) {
326 if (--nlmsvc_users)
327 goto out;
328 } else
329 printk(KERN_WARNING "lockd_down: no users! pid=%d\n", nlmsvc_pid);
330
331 if (!nlmsvc_pid) {
332 if (warned++ == 0)
333 printk(KERN_WARNING "lockd_down: no lockd running.\n");
334 goto out;
335 }
336 warned = 0;
337
338 kill_proc(nlmsvc_pid, SIGKILL, 1);
339 /*
340 * Wait for the lockd process to exit, but since we're holding
341 * the lockd semaphore, we can't wait around forever ...
342 */
343 clear_thread_flag(TIF_SIGPENDING);
344 interruptible_sleep_on_timeout(&lockd_exit, HZ);
345 if (nlmsvc_pid) {
346 printk(KERN_WARNING
347 "lockd_down: lockd failed to exit, clearing pid\n");
348 nlmsvc_pid = 0;
349 }
350 spin_lock_irq(&current->sighand->siglock);
351 recalc_sigpending();
352 spin_unlock_irq(&current->sighand->siglock);
353out:
Ingo Molnar353ab6e2006-03-26 01:37:12 -0800354 mutex_unlock(&nlmsvc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355}
356EXPORT_SYMBOL(lockd_down);
357
358/*
359 * Sysctl parameters (same as module parameters, different interface).
360 */
361
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362static ctl_table nlm_sysctls[] = {
363 {
364 .ctl_name = CTL_UNNUMBERED,
365 .procname = "nlm_grace_period",
366 .data = &nlm_grace_period,
Steve Dickson7ee91ec2005-07-13 01:10:47 -0700367 .maxlen = sizeof(unsigned long),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 .mode = 0644,
369 .proc_handler = &proc_doulongvec_minmax,
370 .extra1 = (unsigned long *) &nlm_grace_period_min,
371 .extra2 = (unsigned long *) &nlm_grace_period_max,
372 },
373 {
374 .ctl_name = CTL_UNNUMBERED,
375 .procname = "nlm_timeout",
376 .data = &nlm_timeout,
Steve Dickson7ee91ec2005-07-13 01:10:47 -0700377 .maxlen = sizeof(unsigned long),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 .mode = 0644,
379 .proc_handler = &proc_doulongvec_minmax,
380 .extra1 = (unsigned long *) &nlm_timeout_min,
381 .extra2 = (unsigned long *) &nlm_timeout_max,
382 },
383 {
384 .ctl_name = CTL_UNNUMBERED,
385 .procname = "nlm_udpport",
386 .data = &nlm_udpport,
387 .maxlen = sizeof(int),
388 .mode = 0644,
389 .proc_handler = &proc_dointvec_minmax,
390 .extra1 = (int *) &nlm_port_min,
391 .extra2 = (int *) &nlm_port_max,
392 },
393 {
394 .ctl_name = CTL_UNNUMBERED,
395 .procname = "nlm_tcpport",
396 .data = &nlm_tcpport,
397 .maxlen = sizeof(int),
398 .mode = 0644,
399 .proc_handler = &proc_dointvec_minmax,
400 .extra1 = (int *) &nlm_port_min,
401 .extra2 = (int *) &nlm_port_max,
402 },
Olaf Kirchabd1f502006-10-04 02:16:01 -0700403 {
404 .ctl_name = CTL_UNNUMBERED,
405 .procname = "nsm_use_hostnames",
406 .data = &nsm_use_hostnames,
407 .maxlen = sizeof(int),
408 .mode = 0644,
409 .proc_handler = &proc_dointvec,
410 },
Olaf Kirch460f5ca2006-10-04 02:16:03 -0700411 {
412 .ctl_name = CTL_UNNUMBERED,
413 .procname = "nsm_local_state",
414 .data = &nsm_local_state,
415 .maxlen = sizeof(int),
416 .mode = 0644,
417 .proc_handler = &proc_dointvec,
418 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 { .ctl_name = 0 }
420};
421
422static ctl_table nlm_sysctl_dir[] = {
423 {
424 .ctl_name = CTL_UNNUMBERED,
425 .procname = "nfs",
426 .mode = 0555,
427 .child = nlm_sysctls,
428 },
429 { .ctl_name = 0 }
430};
431
432static ctl_table nlm_sysctl_root[] = {
433 {
434 .ctl_name = CTL_FS,
435 .procname = "fs",
436 .mode = 0555,
437 .child = nlm_sysctl_dir,
438 },
439 { .ctl_name = 0 }
440};
441
442/*
Robert P. J. Day405ae7d2007-02-17 19:13:42 +0100443 * Module (and sysfs) parameters.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 */
445
446#define param_set_min_max(name, type, which_strtol, min, max) \
447static int param_set_##name(const char *val, struct kernel_param *kp) \
448{ \
449 char *endp; \
450 __typeof__(type) num = which_strtol(val, &endp, 0); \
451 if (endp == val || *endp || num < (min) || num > (max)) \
452 return -EINVAL; \
453 *((int *) kp->arg) = num; \
454 return 0; \
455}
456
457static inline int is_callback(u32 proc)
458{
459 return proc == NLMPROC_GRANTED
460 || proc == NLMPROC_GRANTED_MSG
461 || proc == NLMPROC_TEST_RES
462 || proc == NLMPROC_LOCK_RES
463 || proc == NLMPROC_CANCEL_RES
464 || proc == NLMPROC_UNLOCK_RES
465 || proc == NLMPROC_NSM_NOTIFY;
466}
467
468
469static int lockd_authenticate(struct svc_rqst *rqstp)
470{
471 rqstp->rq_client = NULL;
472 switch (rqstp->rq_authop->flavour) {
473 case RPC_AUTH_NULL:
474 case RPC_AUTH_UNIX:
475 if (rqstp->rq_proc == 0)
476 return SVC_OK;
477 if (is_callback(rqstp->rq_proc)) {
478 /* Leave it to individual procedures to
479 * call nlmsvc_lookup_host(rqstp)
480 */
481 return SVC_OK;
482 }
483 return svc_set_client(rqstp);
484 }
485 return SVC_DENIED;
486}
487
488
489param_set_min_max(port, int, simple_strtol, 0, 65535)
490param_set_min_max(grace_period, unsigned long, simple_strtoul,
491 nlm_grace_period_min, nlm_grace_period_max)
492param_set_min_max(timeout, unsigned long, simple_strtoul,
493 nlm_timeout_min, nlm_timeout_max)
494
495MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
496MODULE_DESCRIPTION("NFS file locking service version " LOCKD_VERSION ".");
497MODULE_LICENSE("GPL");
498
499module_param_call(nlm_grace_period, param_set_grace_period, param_get_ulong,
500 &nlm_grace_period, 0644);
501module_param_call(nlm_timeout, param_set_timeout, param_get_ulong,
502 &nlm_timeout, 0644);
503module_param_call(nlm_udpport, param_set_port, param_get_int,
504 &nlm_udpport, 0644);
505module_param_call(nlm_tcpport, param_set_port, param_get_int,
506 &nlm_tcpport, 0644);
Olaf Kirchabd1f502006-10-04 02:16:01 -0700507module_param(nsm_use_hostnames, bool, 0644);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508
509/*
510 * Initialising and terminating the module.
511 */
512
513static int __init init_nlm(void)
514{
Eric W. Biederman0b4d4142007-02-14 00:34:09 -0800515 nlm_sysctl_table = register_sysctl_table(nlm_sysctl_root);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 return nlm_sysctl_table ? 0 : -ENOMEM;
517}
518
519static void __exit exit_nlm(void)
520{
521 /* FIXME: delete all NLM clients */
522 nlm_shutdown_hosts();
523 unregister_sysctl_table(nlm_sysctl_table);
524}
525
526module_init(init_nlm);
527module_exit(exit_nlm);
528
529/*
530 * Define NLM program and procedures
531 */
532static struct svc_version nlmsvc_version1 = {
533 .vs_vers = 1,
534 .vs_nproc = 17,
535 .vs_proc = nlmsvc_procedures,
536 .vs_xdrsize = NLMSVC_XDRSIZE,
537};
538static struct svc_version nlmsvc_version3 = {
539 .vs_vers = 3,
540 .vs_nproc = 24,
541 .vs_proc = nlmsvc_procedures,
542 .vs_xdrsize = NLMSVC_XDRSIZE,
543};
544#ifdef CONFIG_LOCKD_V4
545static struct svc_version nlmsvc_version4 = {
546 .vs_vers = 4,
547 .vs_nproc = 24,
548 .vs_proc = nlmsvc_procedures4,
549 .vs_xdrsize = NLMSVC_XDRSIZE,
550};
551#endif
552static struct svc_version * nlmsvc_version[] = {
553 [1] = &nlmsvc_version1,
554 [3] = &nlmsvc_version3,
555#ifdef CONFIG_LOCKD_V4
556 [4] = &nlmsvc_version4,
557#endif
558};
559
560static struct svc_stat nlmsvc_stats;
561
Tobias Klausere8c96f82006-03-24 03:15:34 -0800562#define NLM_NRVERS ARRAY_SIZE(nlmsvc_version)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563static struct svc_program nlmsvc_program = {
564 .pg_prog = NLM_PROGRAM, /* program number */
565 .pg_nvers = NLM_NRVERS, /* number of entries in nlmsvc_version */
566 .pg_vers = nlmsvc_version, /* version table */
567 .pg_name = "lockd", /* service name */
568 .pg_class = "nfsd", /* share authentication with nfsd */
569 .pg_stats = &nlmsvc_stats, /* stats table */
570 .pg_authenticate = &lockd_authenticate /* export authentication */
571};