Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
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 | ||
1da177e4 LT |
15 | #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> | |
353ab6e9 | 27 | #include <linux/mutex.h> |
d751a7cd | 28 | #include <linux/kthread.h> |
83144186 | 29 | #include <linux/freezer.h> |
1da177e4 LT |
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> | |
24e36663 | 36 | #include <net/ip.h> |
1da177e4 LT |
37 | #include <linux/lockd/lockd.h> |
38 | #include <linux/nfs.h> | |
39 | ||
40 | #define NLMDBG_FACILITY NLMDBG_SVC | |
41 | #define LOCKD_BUFSIZE (1024 + NLMSVC_XDRSIZE) | |
42 | #define ALLOWED_SIGS (sigmask(SIGKILL)) | |
43 | ||
44 | static struct svc_program nlmsvc_program; | |
45 | ||
46 | struct nlmsvc_binding * nlmsvc_ops; | |
2de59872 | 47 | EXPORT_SYMBOL_GPL(nlmsvc_ops); |
1da177e4 | 48 | |
353ab6e9 | 49 | static DEFINE_MUTEX(nlmsvc_mutex); |
1da177e4 | 50 | static unsigned int nlmsvc_users; |
d751a7cd | 51 | static struct task_struct *nlmsvc_task; |
abd1ec4e | 52 | static struct svc_rqst *nlmsvc_rqst; |
1da177e4 LT |
53 | unsigned long nlmsvc_timeout; |
54 | ||
b064ec03 CL |
55 | /* |
56 | * If the kernel has IPv6 support available, always listen for | |
57 | * both AF_INET and AF_INET6 requests. | |
58 | */ | |
59 | #if (defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)) && \ | |
60 | defined(CONFIG_SUNRPC_REGISTER_V4) | |
61 | static const sa_family_t nlmsvc_family = AF_INET6; | |
62 | #else /* (CONFIG_IPV6 || CONFIG_IPV6_MODULE) && CONFIG_SUNRPC_REGISTER_V4 */ | |
63 | static const sa_family_t nlmsvc_family = AF_INET; | |
64 | #endif /* (CONFIG_IPV6 || CONFIG_IPV6_MODULE) && CONFIG_SUNRPC_REGISTER_V4 */ | |
65 | ||
1da177e4 LT |
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 | ||
c72a476b JL |
74 | /* RLIM_NOFILE defaults to 1024. That seems like a reasonable default here. */ |
75 | static unsigned int nlm_max_connections = 1024; | |
76 | ||
1da177e4 LT |
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 | static const int nlm_port_min = 0, nlm_port_max = 65535; | |
85 | ||
90d5b180 | 86 | #ifdef CONFIG_SYSCTL |
1da177e4 | 87 | static struct ctl_table_header * nlm_sysctl_table; |
90d5b180 | 88 | #endif |
1da177e4 | 89 | |
9a8db97e | 90 | static unsigned long get_lockd_grace_period(void) |
1da177e4 | 91 | { |
1da177e4 LT |
92 | /* Note: nlm_timeout should always be nonzero */ |
93 | if (nlm_grace_period) | |
9a8db97e | 94 | return roundup(nlm_grace_period, nlm_timeout) * HZ; |
1da177e4 | 95 | else |
9a8db97e ME |
96 | return nlm_timeout * 5 * HZ; |
97 | } | |
98 | ||
af558e33 BF |
99 | static struct lock_manager lockd_manager = { |
100 | }; | |
9a8db97e | 101 | |
c8ab5f2a | 102 | static void grace_ender(struct work_struct *not_used) |
9a8db97e | 103 | { |
af558e33 | 104 | locks_end_grace(&lockd_manager); |
1da177e4 LT |
105 | } |
106 | ||
c8ab5f2a BF |
107 | static DECLARE_DELAYED_WORK(grace_period_end, grace_ender); |
108 | ||
109 | static void set_grace_period(void) | |
1da177e4 | 110 | { |
af558e33 | 111 | unsigned long grace_period = get_lockd_grace_period(); |
c8ab5f2a | 112 | |
af558e33 | 113 | locks_start_grace(&lockd_manager); |
c8ab5f2a BF |
114 | cancel_delayed_work_sync(&grace_period_end); |
115 | schedule_delayed_work(&grace_period_end, grace_period); | |
1da177e4 LT |
116 | } |
117 | ||
118 | /* | |
119 | * This is the lockd kernel thread | |
120 | */ | |
d751a7cd JL |
121 | static int |
122 | lockd(void *vrqstp) | |
1da177e4 | 123 | { |
f97c650d | 124 | int err = 0, preverr = 0; |
d751a7cd | 125 | struct svc_rqst *rqstp = vrqstp; |
1da177e4 | 126 | |
d751a7cd | 127 | /* try_to_freeze() is called from svc_recv() */ |
83144186 | 128 | set_freezable(); |
1da177e4 | 129 | |
d751a7cd | 130 | /* Allow SIGKILL to tell lockd to drop all of its locks */ |
1da177e4 LT |
131 | allow_signal(SIGKILL); |
132 | ||
1da177e4 LT |
133 | dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n"); |
134 | ||
d751a7cd JL |
135 | /* |
136 | * FIXME: it would be nice if lockd didn't spend its entire life | |
137 | * running under the BKL. At the very least, it would be good to | |
138 | * have someone clarify what it's intended to protect here. I've | |
139 | * seen some handwavy posts about posix locking needing to be | |
140 | * done under the BKL, but it's far from clear. | |
141 | */ | |
142 | lock_kernel(); | |
143 | ||
1da177e4 LT |
144 | if (!nlm_timeout) |
145 | nlm_timeout = LOCKD_DFLT_TIMEO; | |
146 | nlmsvc_timeout = nlm_timeout * HZ; | |
147 | ||
c8ab5f2a | 148 | set_grace_period(); |
1da177e4 LT |
149 | |
150 | /* | |
151 | * The main request loop. We don't terminate until the last | |
d751a7cd | 152 | * NFS mount or NFS daemon has gone away. |
1da177e4 | 153 | */ |
d751a7cd | 154 | while (!kthread_should_stop()) { |
1da177e4 | 155 | long timeout = MAX_SCHEDULE_TIMEOUT; |
5216a8e7 | 156 | RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); |
1da177e4 | 157 | |
c72a476b JL |
158 | /* update sv_maxconn if it has changed */ |
159 | rqstp->rq_server->sv_maxconn = nlm_max_connections; | |
160 | ||
1da177e4 LT |
161 | if (signalled()) { |
162 | flush_signals(current); | |
163 | if (nlmsvc_ops) { | |
164 | nlmsvc_invalidate_all(); | |
c8ab5f2a | 165 | set_grace_period(); |
1da177e4 | 166 | } |
d751a7cd | 167 | continue; |
1da177e4 LT |
168 | } |
169 | ||
8fafa900 BF |
170 | timeout = nlmsvc_retry_blocked(); |
171 | ||
1da177e4 LT |
172 | /* |
173 | * Find a socket with data available and call its | |
174 | * recvfrom routine. | |
175 | */ | |
6fb2b47f | 176 | err = svc_recv(rqstp, timeout); |
f97c650d JL |
177 | if (err == -EAGAIN || err == -EINTR) { |
178 | preverr = err; | |
1da177e4 | 179 | continue; |
f97c650d | 180 | } |
1da177e4 | 181 | if (err < 0) { |
f97c650d JL |
182 | if (err != preverr) { |
183 | printk(KERN_WARNING "%s: unexpected error " | |
184 | "from svc_recv (%d)\n", __func__, err); | |
185 | preverr = err; | |
186 | } | |
187 | schedule_timeout_interruptible(HZ); | |
188 | continue; | |
1da177e4 | 189 | } |
f97c650d | 190 | preverr = err; |
1da177e4 | 191 | |
ad06e4bd CL |
192 | dprintk("lockd: request from %s\n", |
193 | svc_print_addr(rqstp, buf, sizeof(buf))); | |
1da177e4 | 194 | |
6fb2b47f | 195 | svc_process(rqstp); |
1da177e4 | 196 | } |
2bd61579 | 197 | flush_signals(current); |
c8ab5f2a | 198 | cancel_delayed_work_sync(&grace_period_end); |
2c5e7615 | 199 | locks_end_grace(&lockd_manager); |
d751a7cd JL |
200 | if (nlmsvc_ops) |
201 | nlmsvc_invalidate_all(); | |
202 | nlm_shutdown_hosts(); | |
d751a7cd | 203 | unlock_kernel(); |
d751a7cd | 204 | return 0; |
1da177e4 LT |
205 | } |
206 | ||
d3fe5ea7 CL |
207 | static int create_lockd_listener(struct svc_serv *serv, char *name, |
208 | unsigned short port) | |
209 | { | |
210 | struct svc_xprt *xprt; | |
211 | ||
212 | xprt = svc_find_xprt(serv, name, 0, 0); | |
213 | if (xprt == NULL) | |
214 | return svc_create_xprt(serv, name, port, SVC_SOCK_DEFAULTS); | |
215 | ||
216 | svc_xprt_put(xprt); | |
217 | return 0; | |
218 | } | |
219 | ||
482fb94e | 220 | /* |
8c3916f4 CL |
221 | * Ensure there are active UDP and TCP listeners for lockd. |
222 | * | |
223 | * Even if we have only TCP NFS mounts and/or TCP NFSDs, some | |
224 | * local services (such as rpc.statd) still require UDP, and | |
225 | * some NFS servers do not yet support NLM over TCP. | |
226 | * | |
227 | * Returns zero if all listeners are available; otherwise a | |
228 | * negative errno value is returned. | |
482fb94e | 229 | */ |
8c3916f4 | 230 | static int make_socks(struct svc_serv *serv) |
24e36663 | 231 | { |
482fb94e | 232 | static int warned; |
24e36663 | 233 | int err = 0; |
482fb94e | 234 | |
d3fe5ea7 CL |
235 | err = create_lockd_listener(serv, "udp", nlm_udpport); |
236 | if (err >= 0) | |
237 | err = create_lockd_listener(serv, "tcp", nlm_tcpport); | |
482fb94e | 238 | if (err >= 0) { |
7dcf91ec | 239 | warned = 0; |
482fb94e CL |
240 | err = 0; |
241 | } else if (warned++ == 0) | |
7dcf91ec N |
242 | printk(KERN_WARNING |
243 | "lockd_up: makesock failed, error=%d\n", err); | |
24e36663 N |
244 | return err; |
245 | } | |
246 | ||
1da177e4 LT |
247 | /* |
248 | * Bring up the lockd process if it's not already up. | |
249 | */ | |
26a41409 | 250 | int lockd_up(void) |
1da177e4 | 251 | { |
d751a7cd | 252 | struct svc_serv *serv; |
d751a7cd | 253 | int error = 0; |
1da177e4 | 254 | |
353ab6e9 | 255 | mutex_lock(&nlmsvc_mutex); |
1da177e4 LT |
256 | /* |
257 | * Check whether we're already up and running. | |
258 | */ | |
8c3916f4 | 259 | if (nlmsvc_rqst) |
1da177e4 LT |
260 | goto out; |
261 | ||
262 | /* | |
263 | * Sanity check: if there's no pid, | |
264 | * we should be the first user ... | |
265 | */ | |
4a3ae42d | 266 | if (nlmsvc_users) |
1da177e4 LT |
267 | printk(KERN_WARNING |
268 | "lockd_up: no pid, %d users??\n", nlmsvc_users); | |
269 | ||
270 | error = -ENOMEM; | |
b064ec03 | 271 | serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, nlmsvc_family, NULL); |
1da177e4 LT |
272 | if (!serv) { |
273 | printk(KERN_WARNING "lockd_up: create service failed\n"); | |
274 | goto out; | |
275 | } | |
276 | ||
8c3916f4 CL |
277 | error = make_socks(serv); |
278 | if (error < 0) | |
1da177e4 | 279 | goto destroy_and_out; |
1da177e4 LT |
280 | |
281 | /* | |
282 | * Create the kernel thread and wait for it to start. | |
283 | */ | |
abd1ec4e JL |
284 | nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0]); |
285 | if (IS_ERR(nlmsvc_rqst)) { | |
286 | error = PTR_ERR(nlmsvc_rqst); | |
287 | nlmsvc_rqst = NULL; | |
d751a7cd JL |
288 | printk(KERN_WARNING |
289 | "lockd_up: svc_rqst allocation failed, error=%d\n", | |
290 | error); | |
291 | goto destroy_and_out; | |
292 | } | |
293 | ||
294 | svc_sock_update_bufs(serv); | |
c72a476b | 295 | serv->sv_maxconn = nlm_max_connections; |
d751a7cd | 296 | |
abd1ec4e | 297 | nlmsvc_task = kthread_run(lockd, nlmsvc_rqst, serv->sv_name); |
d751a7cd JL |
298 | if (IS_ERR(nlmsvc_task)) { |
299 | error = PTR_ERR(nlmsvc_task); | |
abd1ec4e | 300 | svc_exit_thread(nlmsvc_rqst); |
d751a7cd | 301 | nlmsvc_task = NULL; |
abd1ec4e | 302 | nlmsvc_rqst = NULL; |
1da177e4 | 303 | printk(KERN_WARNING |
d751a7cd | 304 | "lockd_up: kthread_run failed, error=%d\n", error); |
1da177e4 LT |
305 | goto destroy_and_out; |
306 | } | |
1da177e4 LT |
307 | |
308 | /* | |
309 | * Note: svc_serv structures have an initial use count of 1, | |
310 | * so we exit through here on both success and failure. | |
311 | */ | |
312 | destroy_and_out: | |
313 | svc_destroy(serv); | |
314 | out: | |
4a3ae42d N |
315 | if (!error) |
316 | nlmsvc_users++; | |
353ab6e9 | 317 | mutex_unlock(&nlmsvc_mutex); |
1da177e4 LT |
318 | return error; |
319 | } | |
2de59872 | 320 | EXPORT_SYMBOL_GPL(lockd_up); |
1da177e4 LT |
321 | |
322 | /* | |
323 | * Decrement the user count and bring down lockd if we're the last. | |
324 | */ | |
325 | void | |
326 | lockd_down(void) | |
327 | { | |
353ab6e9 | 328 | mutex_lock(&nlmsvc_mutex); |
1da177e4 LT |
329 | if (nlmsvc_users) { |
330 | if (--nlmsvc_users) | |
331 | goto out; | |
d751a7cd JL |
332 | } else { |
333 | printk(KERN_ERR "lockd_down: no users! task=%p\n", | |
334 | nlmsvc_task); | |
335 | BUG(); | |
1da177e4 | 336 | } |
1da177e4 | 337 | |
d751a7cd JL |
338 | if (!nlmsvc_task) { |
339 | printk(KERN_ERR "lockd_down: no lockd running.\n"); | |
340 | BUG(); | |
1da177e4 | 341 | } |
d751a7cd | 342 | kthread_stop(nlmsvc_task); |
abd1ec4e JL |
343 | svc_exit_thread(nlmsvc_rqst); |
344 | nlmsvc_task = NULL; | |
345 | nlmsvc_rqst = NULL; | |
1da177e4 | 346 | out: |
353ab6e9 | 347 | mutex_unlock(&nlmsvc_mutex); |
1da177e4 | 348 | } |
2de59872 | 349 | EXPORT_SYMBOL_GPL(lockd_down); |
1da177e4 | 350 | |
90d5b180 CL |
351 | #ifdef CONFIG_SYSCTL |
352 | ||
1da177e4 LT |
353 | /* |
354 | * Sysctl parameters (same as module parameters, different interface). | |
355 | */ | |
356 | ||
1da177e4 LT |
357 | static ctl_table nlm_sysctls[] = { |
358 | { | |
359 | .ctl_name = CTL_UNNUMBERED, | |
360 | .procname = "nlm_grace_period", | |
361 | .data = &nlm_grace_period, | |
7ee91ec1 | 362 | .maxlen = sizeof(unsigned long), |
1da177e4 LT |
363 | .mode = 0644, |
364 | .proc_handler = &proc_doulongvec_minmax, | |
365 | .extra1 = (unsigned long *) &nlm_grace_period_min, | |
366 | .extra2 = (unsigned long *) &nlm_grace_period_max, | |
367 | }, | |
368 | { | |
369 | .ctl_name = CTL_UNNUMBERED, | |
370 | .procname = "nlm_timeout", | |
371 | .data = &nlm_timeout, | |
7ee91ec1 | 372 | .maxlen = sizeof(unsigned long), |
1da177e4 LT |
373 | .mode = 0644, |
374 | .proc_handler = &proc_doulongvec_minmax, | |
375 | .extra1 = (unsigned long *) &nlm_timeout_min, | |
376 | .extra2 = (unsigned long *) &nlm_timeout_max, | |
377 | }, | |
378 | { | |
379 | .ctl_name = CTL_UNNUMBERED, | |
380 | .procname = "nlm_udpport", | |
381 | .data = &nlm_udpport, | |
382 | .maxlen = sizeof(int), | |
383 | .mode = 0644, | |
384 | .proc_handler = &proc_dointvec_minmax, | |
385 | .extra1 = (int *) &nlm_port_min, | |
386 | .extra2 = (int *) &nlm_port_max, | |
387 | }, | |
388 | { | |
389 | .ctl_name = CTL_UNNUMBERED, | |
390 | .procname = "nlm_tcpport", | |
391 | .data = &nlm_tcpport, | |
392 | .maxlen = sizeof(int), | |
393 | .mode = 0644, | |
394 | .proc_handler = &proc_dointvec_minmax, | |
395 | .extra1 = (int *) &nlm_port_min, | |
396 | .extra2 = (int *) &nlm_port_max, | |
397 | }, | |
abd1f500 OK |
398 | { |
399 | .ctl_name = CTL_UNNUMBERED, | |
400 | .procname = "nsm_use_hostnames", | |
401 | .data = &nsm_use_hostnames, | |
402 | .maxlen = sizeof(int), | |
403 | .mode = 0644, | |
404 | .proc_handler = &proc_dointvec, | |
405 | }, | |
460f5cac OK |
406 | { |
407 | .ctl_name = CTL_UNNUMBERED, | |
408 | .procname = "nsm_local_state", | |
409 | .data = &nsm_local_state, | |
410 | .maxlen = sizeof(int), | |
411 | .mode = 0644, | |
412 | .proc_handler = &proc_dointvec, | |
413 | }, | |
1da177e4 LT |
414 | { .ctl_name = 0 } |
415 | }; | |
416 | ||
417 | static ctl_table nlm_sysctl_dir[] = { | |
418 | { | |
419 | .ctl_name = CTL_UNNUMBERED, | |
420 | .procname = "nfs", | |
421 | .mode = 0555, | |
422 | .child = nlm_sysctls, | |
423 | }, | |
424 | { .ctl_name = 0 } | |
425 | }; | |
426 | ||
427 | static ctl_table nlm_sysctl_root[] = { | |
428 | { | |
429 | .ctl_name = CTL_FS, | |
430 | .procname = "fs", | |
431 | .mode = 0555, | |
432 | .child = nlm_sysctl_dir, | |
433 | }, | |
434 | { .ctl_name = 0 } | |
435 | }; | |
436 | ||
90d5b180 CL |
437 | #endif /* CONFIG_SYSCTL */ |
438 | ||
1da177e4 | 439 | /* |
405ae7d3 | 440 | * Module (and sysfs) parameters. |
1da177e4 LT |
441 | */ |
442 | ||
443 | #define param_set_min_max(name, type, which_strtol, min, max) \ | |
444 | static int param_set_##name(const char *val, struct kernel_param *kp) \ | |
445 | { \ | |
446 | char *endp; \ | |
447 | __typeof__(type) num = which_strtol(val, &endp, 0); \ | |
448 | if (endp == val || *endp || num < (min) || num > (max)) \ | |
449 | return -EINVAL; \ | |
450 | *((int *) kp->arg) = num; \ | |
451 | return 0; \ | |
452 | } | |
453 | ||
454 | static inline int is_callback(u32 proc) | |
455 | { | |
456 | return proc == NLMPROC_GRANTED | |
457 | || proc == NLMPROC_GRANTED_MSG | |
458 | || proc == NLMPROC_TEST_RES | |
459 | || proc == NLMPROC_LOCK_RES | |
460 | || proc == NLMPROC_CANCEL_RES | |
461 | || proc == NLMPROC_UNLOCK_RES | |
462 | || proc == NLMPROC_NSM_NOTIFY; | |
463 | } | |
464 | ||
465 | ||
466 | static int lockd_authenticate(struct svc_rqst *rqstp) | |
467 | { | |
468 | rqstp->rq_client = NULL; | |
469 | switch (rqstp->rq_authop->flavour) { | |
470 | case RPC_AUTH_NULL: | |
471 | case RPC_AUTH_UNIX: | |
472 | if (rqstp->rq_proc == 0) | |
473 | return SVC_OK; | |
474 | if (is_callback(rqstp->rq_proc)) { | |
475 | /* Leave it to individual procedures to | |
476 | * call nlmsvc_lookup_host(rqstp) | |
477 | */ | |
478 | return SVC_OK; | |
479 | } | |
480 | return svc_set_client(rqstp); | |
481 | } | |
482 | return SVC_DENIED; | |
483 | } | |
484 | ||
485 | ||
486 | param_set_min_max(port, int, simple_strtol, 0, 65535) | |
487 | param_set_min_max(grace_period, unsigned long, simple_strtoul, | |
488 | nlm_grace_period_min, nlm_grace_period_max) | |
489 | param_set_min_max(timeout, unsigned long, simple_strtoul, | |
490 | nlm_timeout_min, nlm_timeout_max) | |
491 | ||
492 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
493 | MODULE_DESCRIPTION("NFS file locking service version " LOCKD_VERSION "."); | |
494 | MODULE_LICENSE("GPL"); | |
495 | ||
496 | module_param_call(nlm_grace_period, param_set_grace_period, param_get_ulong, | |
497 | &nlm_grace_period, 0644); | |
498 | module_param_call(nlm_timeout, param_set_timeout, param_get_ulong, | |
499 | &nlm_timeout, 0644); | |
500 | module_param_call(nlm_udpport, param_set_port, param_get_int, | |
501 | &nlm_udpport, 0644); | |
502 | module_param_call(nlm_tcpport, param_set_port, param_get_int, | |
503 | &nlm_tcpport, 0644); | |
abd1f500 | 504 | module_param(nsm_use_hostnames, bool, 0644); |
c72a476b | 505 | module_param(nlm_max_connections, uint, 0644); |
1da177e4 LT |
506 | |
507 | /* | |
508 | * Initialising and terminating the module. | |
509 | */ | |
510 | ||
511 | static int __init init_nlm(void) | |
512 | { | |
90d5b180 | 513 | #ifdef CONFIG_SYSCTL |
0b4d4147 | 514 | nlm_sysctl_table = register_sysctl_table(nlm_sysctl_root); |
1da177e4 | 515 | return nlm_sysctl_table ? 0 : -ENOMEM; |
90d5b180 CL |
516 | #else |
517 | return 0; | |
518 | #endif | |
1da177e4 LT |
519 | } |
520 | ||
521 | static void __exit exit_nlm(void) | |
522 | { | |
523 | /* FIXME: delete all NLM clients */ | |
524 | nlm_shutdown_hosts(); | |
90d5b180 | 525 | #ifdef CONFIG_SYSCTL |
1da177e4 | 526 | unregister_sysctl_table(nlm_sysctl_table); |
90d5b180 | 527 | #endif |
1da177e4 LT |
528 | } |
529 | ||
530 | module_init(init_nlm); | |
531 | module_exit(exit_nlm); | |
532 | ||
533 | /* | |
534 | * Define NLM program and procedures | |
535 | */ | |
536 | static struct svc_version nlmsvc_version1 = { | |
537 | .vs_vers = 1, | |
538 | .vs_nproc = 17, | |
539 | .vs_proc = nlmsvc_procedures, | |
540 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
541 | }; | |
542 | static struct svc_version nlmsvc_version3 = { | |
543 | .vs_vers = 3, | |
544 | .vs_nproc = 24, | |
545 | .vs_proc = nlmsvc_procedures, | |
546 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
547 | }; | |
548 | #ifdef CONFIG_LOCKD_V4 | |
549 | static struct svc_version nlmsvc_version4 = { | |
550 | .vs_vers = 4, | |
551 | .vs_nproc = 24, | |
552 | .vs_proc = nlmsvc_procedures4, | |
553 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
554 | }; | |
555 | #endif | |
556 | static struct svc_version * nlmsvc_version[] = { | |
557 | [1] = &nlmsvc_version1, | |
558 | [3] = &nlmsvc_version3, | |
559 | #ifdef CONFIG_LOCKD_V4 | |
560 | [4] = &nlmsvc_version4, | |
561 | #endif | |
562 | }; | |
563 | ||
564 | static struct svc_stat nlmsvc_stats; | |
565 | ||
e8c96f8c | 566 | #define NLM_NRVERS ARRAY_SIZE(nlmsvc_version) |
1da177e4 LT |
567 | static struct svc_program nlmsvc_program = { |
568 | .pg_prog = NLM_PROGRAM, /* program number */ | |
569 | .pg_nvers = NLM_NRVERS, /* number of entries in nlmsvc_version */ | |
570 | .pg_vers = nlmsvc_version, /* version table */ | |
571 | .pg_name = "lockd", /* service name */ | |
572 | .pg_class = "nfsd", /* share authentication with nfsd */ | |
573 | .pg_stats = &nlmsvc_stats, /* stats table */ | |
574 | .pg_authenticate = &lockd_authenticate /* export authentication */ | |
575 | }; |