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> | |
1da177e4 LT |
24 | #include <linux/smp.h> |
25 | #include <linux/smp_lock.h> | |
353ab6e9 | 26 | #include <linux/mutex.h> |
d751a7cd | 27 | #include <linux/kthread.h> |
83144186 | 28 | #include <linux/freezer.h> |
1da177e4 LT |
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> | |
24e36663 | 35 | #include <net/ip.h> |
1da177e4 LT |
36 | #include <linux/lockd/lockd.h> |
37 | #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 | ||
43 | static struct svc_program nlmsvc_program; | |
44 | ||
45 | struct nlmsvc_binding * nlmsvc_ops; | |
2de59872 | 46 | EXPORT_SYMBOL_GPL(nlmsvc_ops); |
1da177e4 | 47 | |
353ab6e9 | 48 | static DEFINE_MUTEX(nlmsvc_mutex); |
1da177e4 | 49 | static unsigned int nlmsvc_users; |
d751a7cd | 50 | static struct task_struct *nlmsvc_task; |
abd1ec4e | 51 | static struct svc_rqst *nlmsvc_rqst; |
1da177e4 LT |
52 | unsigned long nlmsvc_timeout; |
53 | ||
1da177e4 LT |
54 | /* |
55 | * These can be set at insmod time (useful for NFS as root filesystem), | |
56 | * and also changed through the sysctl interface. -- Jamie Lokier, Aug 2003 | |
57 | */ | |
58 | static unsigned long nlm_grace_period; | |
59 | static unsigned long nlm_timeout = LOCKD_DFLT_TIMEO; | |
60 | static int nlm_udpport, nlm_tcpport; | |
61 | ||
c72a476b JL |
62 | /* RLIM_NOFILE defaults to 1024. That seems like a reasonable default here. */ |
63 | static unsigned int nlm_max_connections = 1024; | |
64 | ||
1da177e4 LT |
65 | /* |
66 | * Constants needed for the sysctl interface. | |
67 | */ | |
68 | static const unsigned long nlm_grace_period_min = 0; | |
69 | static const unsigned long nlm_grace_period_max = 240; | |
70 | static const unsigned long nlm_timeout_min = 3; | |
71 | static const unsigned long nlm_timeout_max = 20; | |
72 | static const int nlm_port_min = 0, nlm_port_max = 65535; | |
73 | ||
90d5b180 | 74 | #ifdef CONFIG_SYSCTL |
1da177e4 | 75 | static struct ctl_table_header * nlm_sysctl_table; |
90d5b180 | 76 | #endif |
1da177e4 | 77 | |
9a8db97e | 78 | static unsigned long get_lockd_grace_period(void) |
1da177e4 | 79 | { |
1da177e4 LT |
80 | /* Note: nlm_timeout should always be nonzero */ |
81 | if (nlm_grace_period) | |
9a8db97e | 82 | return roundup(nlm_grace_period, nlm_timeout) * HZ; |
1da177e4 | 83 | else |
9a8db97e ME |
84 | return nlm_timeout * 5 * HZ; |
85 | } | |
86 | ||
af558e33 BF |
87 | static struct lock_manager lockd_manager = { |
88 | }; | |
9a8db97e | 89 | |
c8ab5f2a | 90 | static void grace_ender(struct work_struct *not_used) |
9a8db97e | 91 | { |
af558e33 | 92 | locks_end_grace(&lockd_manager); |
1da177e4 LT |
93 | } |
94 | ||
c8ab5f2a BF |
95 | static DECLARE_DELAYED_WORK(grace_period_end, grace_ender); |
96 | ||
97 | static void set_grace_period(void) | |
1da177e4 | 98 | { |
af558e33 | 99 | unsigned long grace_period = get_lockd_grace_period(); |
c8ab5f2a | 100 | |
af558e33 | 101 | locks_start_grace(&lockd_manager); |
c8ab5f2a BF |
102 | cancel_delayed_work_sync(&grace_period_end); |
103 | schedule_delayed_work(&grace_period_end, grace_period); | |
1da177e4 LT |
104 | } |
105 | ||
89996df4 BF |
106 | static void restart_grace(void) |
107 | { | |
108 | if (nlmsvc_ops) { | |
109 | cancel_delayed_work_sync(&grace_period_end); | |
110 | locks_end_grace(&lockd_manager); | |
111 | nlmsvc_invalidate_all(); | |
112 | set_grace_period(); | |
113 | } | |
114 | } | |
115 | ||
1da177e4 LT |
116 | /* |
117 | * This is the lockd kernel thread | |
118 | */ | |
d751a7cd JL |
119 | static int |
120 | lockd(void *vrqstp) | |
1da177e4 | 121 | { |
f97c650d | 122 | int err = 0, preverr = 0; |
d751a7cd | 123 | struct svc_rqst *rqstp = vrqstp; |
1da177e4 | 124 | |
d751a7cd | 125 | /* try_to_freeze() is called from svc_recv() */ |
83144186 | 126 | set_freezable(); |
1da177e4 | 127 | |
d751a7cd | 128 | /* Allow SIGKILL to tell lockd to drop all of its locks */ |
1da177e4 LT |
129 | allow_signal(SIGKILL); |
130 | ||
1da177e4 LT |
131 | dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n"); |
132 | ||
d751a7cd JL |
133 | /* |
134 | * FIXME: it would be nice if lockd didn't spend its entire life | |
135 | * running under the BKL. At the very least, it would be good to | |
136 | * have someone clarify what it's intended to protect here. I've | |
137 | * seen some handwavy posts about posix locking needing to be | |
138 | * done under the BKL, but it's far from clear. | |
139 | */ | |
140 | lock_kernel(); | |
141 | ||
1da177e4 LT |
142 | if (!nlm_timeout) |
143 | nlm_timeout = LOCKD_DFLT_TIMEO; | |
144 | nlmsvc_timeout = nlm_timeout * HZ; | |
145 | ||
c8ab5f2a | 146 | set_grace_period(); |
1da177e4 LT |
147 | |
148 | /* | |
149 | * The main request loop. We don't terminate until the last | |
d751a7cd | 150 | * NFS mount or NFS daemon has gone away. |
1da177e4 | 151 | */ |
d751a7cd | 152 | while (!kthread_should_stop()) { |
1da177e4 | 153 | long timeout = MAX_SCHEDULE_TIMEOUT; |
5216a8e7 | 154 | RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); |
1da177e4 | 155 | |
c72a476b JL |
156 | /* update sv_maxconn if it has changed */ |
157 | rqstp->rq_server->sv_maxconn = nlm_max_connections; | |
158 | ||
1da177e4 LT |
159 | if (signalled()) { |
160 | flush_signals(current); | |
89996df4 | 161 | restart_grace(); |
d751a7cd | 162 | continue; |
1da177e4 LT |
163 | } |
164 | ||
8fafa900 BF |
165 | timeout = nlmsvc_retry_blocked(); |
166 | ||
1da177e4 LT |
167 | /* |
168 | * Find a socket with data available and call its | |
169 | * recvfrom routine. | |
170 | */ | |
6fb2b47f | 171 | err = svc_recv(rqstp, timeout); |
f97c650d JL |
172 | if (err == -EAGAIN || err == -EINTR) { |
173 | preverr = err; | |
1da177e4 | 174 | continue; |
f97c650d | 175 | } |
1da177e4 | 176 | if (err < 0) { |
f97c650d JL |
177 | if (err != preverr) { |
178 | printk(KERN_WARNING "%s: unexpected error " | |
179 | "from svc_recv (%d)\n", __func__, err); | |
180 | preverr = err; | |
181 | } | |
182 | schedule_timeout_interruptible(HZ); | |
183 | continue; | |
1da177e4 | 184 | } |
f97c650d | 185 | preverr = err; |
1da177e4 | 186 | |
ad06e4bd CL |
187 | dprintk("lockd: request from %s\n", |
188 | svc_print_addr(rqstp, buf, sizeof(buf))); | |
1da177e4 | 189 | |
6fb2b47f | 190 | svc_process(rqstp); |
1da177e4 | 191 | } |
2bd61579 | 192 | flush_signals(current); |
c8ab5f2a | 193 | cancel_delayed_work_sync(&grace_period_end); |
2c5e7615 | 194 | locks_end_grace(&lockd_manager); |
d751a7cd JL |
195 | if (nlmsvc_ops) |
196 | nlmsvc_invalidate_all(); | |
197 | nlm_shutdown_hosts(); | |
d751a7cd | 198 | unlock_kernel(); |
d751a7cd | 199 | return 0; |
1da177e4 LT |
200 | } |
201 | ||
eb16e907 CL |
202 | static int create_lockd_listener(struct svc_serv *serv, const char *name, |
203 | const int family, const unsigned short port) | |
d3fe5ea7 CL |
204 | { |
205 | struct svc_xprt *xprt; | |
206 | ||
eb16e907 | 207 | xprt = svc_find_xprt(serv, name, family, 0); |
d3fe5ea7 | 208 | if (xprt == NULL) |
eb16e907 CL |
209 | return svc_create_xprt(serv, name, family, port, |
210 | SVC_SOCK_DEFAULTS); | |
d3fe5ea7 CL |
211 | svc_xprt_put(xprt); |
212 | return 0; | |
213 | } | |
214 | ||
eb16e907 CL |
215 | static int create_lockd_family(struct svc_serv *serv, const int family) |
216 | { | |
217 | int err; | |
218 | ||
219 | err = create_lockd_listener(serv, "udp", family, nlm_udpport); | |
220 | if (err < 0) | |
221 | return err; | |
222 | ||
223 | return create_lockd_listener(serv, "tcp", family, nlm_tcpport); | |
224 | } | |
225 | ||
482fb94e | 226 | /* |
8c3916f4 CL |
227 | * Ensure there are active UDP and TCP listeners for lockd. |
228 | * | |
229 | * Even if we have only TCP NFS mounts and/or TCP NFSDs, some | |
230 | * local services (such as rpc.statd) still require UDP, and | |
231 | * some NFS servers do not yet support NLM over TCP. | |
232 | * | |
233 | * Returns zero if all listeners are available; otherwise a | |
234 | * negative errno value is returned. | |
482fb94e | 235 | */ |
8c3916f4 | 236 | static int make_socks(struct svc_serv *serv) |
24e36663 | 237 | { |
482fb94e | 238 | static int warned; |
0dba7c2a | 239 | int err; |
482fb94e | 240 | |
eb16e907 | 241 | err = create_lockd_family(serv, PF_INET); |
0dba7c2a CL |
242 | if (err < 0) |
243 | goto out_err; | |
244 | ||
eb16e907 CL |
245 | err = create_lockd_family(serv, PF_INET6); |
246 | if (err < 0 && err != -EAFNOSUPPORT) | |
0dba7c2a CL |
247 | goto out_err; |
248 | ||
249 | warned = 0; | |
250 | return 0; | |
251 | ||
252 | out_err: | |
253 | if (warned++ == 0) | |
7dcf91ec | 254 | printk(KERN_WARNING |
0dba7c2a | 255 | "lockd_up: makesock failed, error=%d\n", err); |
24e36663 N |
256 | return err; |
257 | } | |
258 | ||
1da177e4 LT |
259 | /* |
260 | * Bring up the lockd process if it's not already up. | |
261 | */ | |
26a41409 | 262 | int lockd_up(void) |
1da177e4 | 263 | { |
d751a7cd | 264 | struct svc_serv *serv; |
d751a7cd | 265 | int error = 0; |
1da177e4 | 266 | |
353ab6e9 | 267 | mutex_lock(&nlmsvc_mutex); |
1da177e4 LT |
268 | /* |
269 | * Check whether we're already up and running. | |
270 | */ | |
8c3916f4 | 271 | if (nlmsvc_rqst) |
1da177e4 LT |
272 | goto out; |
273 | ||
274 | /* | |
275 | * Sanity check: if there's no pid, | |
276 | * we should be the first user ... | |
277 | */ | |
4a3ae42d | 278 | if (nlmsvc_users) |
1da177e4 LT |
279 | printk(KERN_WARNING |
280 | "lockd_up: no pid, %d users??\n", nlmsvc_users); | |
281 | ||
282 | error = -ENOMEM; | |
49a9072f | 283 | serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, NULL); |
1da177e4 LT |
284 | if (!serv) { |
285 | printk(KERN_WARNING "lockd_up: create service failed\n"); | |
286 | goto out; | |
287 | } | |
288 | ||
8c3916f4 CL |
289 | error = make_socks(serv); |
290 | if (error < 0) | |
1da177e4 | 291 | goto destroy_and_out; |
1da177e4 LT |
292 | |
293 | /* | |
294 | * Create the kernel thread and wait for it to start. | |
295 | */ | |
abd1ec4e JL |
296 | nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0]); |
297 | if (IS_ERR(nlmsvc_rqst)) { | |
298 | error = PTR_ERR(nlmsvc_rqst); | |
299 | nlmsvc_rqst = NULL; | |
d751a7cd JL |
300 | printk(KERN_WARNING |
301 | "lockd_up: svc_rqst allocation failed, error=%d\n", | |
302 | error); | |
303 | goto destroy_and_out; | |
304 | } | |
305 | ||
306 | svc_sock_update_bufs(serv); | |
c72a476b | 307 | serv->sv_maxconn = nlm_max_connections; |
d751a7cd | 308 | |
abd1ec4e | 309 | nlmsvc_task = kthread_run(lockd, nlmsvc_rqst, serv->sv_name); |
d751a7cd JL |
310 | if (IS_ERR(nlmsvc_task)) { |
311 | error = PTR_ERR(nlmsvc_task); | |
abd1ec4e | 312 | svc_exit_thread(nlmsvc_rqst); |
d751a7cd | 313 | nlmsvc_task = NULL; |
abd1ec4e | 314 | nlmsvc_rqst = NULL; |
1da177e4 | 315 | printk(KERN_WARNING |
d751a7cd | 316 | "lockd_up: kthread_run failed, error=%d\n", error); |
1da177e4 LT |
317 | goto destroy_and_out; |
318 | } | |
1da177e4 LT |
319 | |
320 | /* | |
321 | * Note: svc_serv structures have an initial use count of 1, | |
322 | * so we exit through here on both success and failure. | |
323 | */ | |
324 | destroy_and_out: | |
325 | svc_destroy(serv); | |
326 | out: | |
4a3ae42d N |
327 | if (!error) |
328 | nlmsvc_users++; | |
353ab6e9 | 329 | mutex_unlock(&nlmsvc_mutex); |
1da177e4 LT |
330 | return error; |
331 | } | |
2de59872 | 332 | EXPORT_SYMBOL_GPL(lockd_up); |
1da177e4 LT |
333 | |
334 | /* | |
335 | * Decrement the user count and bring down lockd if we're the last. | |
336 | */ | |
337 | void | |
338 | lockd_down(void) | |
339 | { | |
353ab6e9 | 340 | mutex_lock(&nlmsvc_mutex); |
1da177e4 LT |
341 | if (nlmsvc_users) { |
342 | if (--nlmsvc_users) | |
343 | goto out; | |
d751a7cd JL |
344 | } else { |
345 | printk(KERN_ERR "lockd_down: no users! task=%p\n", | |
346 | nlmsvc_task); | |
347 | BUG(); | |
1da177e4 | 348 | } |
1da177e4 | 349 | |
d751a7cd JL |
350 | if (!nlmsvc_task) { |
351 | printk(KERN_ERR "lockd_down: no lockd running.\n"); | |
352 | BUG(); | |
1da177e4 | 353 | } |
d751a7cd | 354 | kthread_stop(nlmsvc_task); |
abd1ec4e JL |
355 | svc_exit_thread(nlmsvc_rqst); |
356 | nlmsvc_task = NULL; | |
357 | nlmsvc_rqst = NULL; | |
1da177e4 | 358 | out: |
353ab6e9 | 359 | mutex_unlock(&nlmsvc_mutex); |
1da177e4 | 360 | } |
2de59872 | 361 | EXPORT_SYMBOL_GPL(lockd_down); |
1da177e4 | 362 | |
90d5b180 CL |
363 | #ifdef CONFIG_SYSCTL |
364 | ||
1da177e4 LT |
365 | /* |
366 | * Sysctl parameters (same as module parameters, different interface). | |
367 | */ | |
368 | ||
1da177e4 LT |
369 | static ctl_table nlm_sysctls[] = { |
370 | { | |
1da177e4 LT |
371 | .procname = "nlm_grace_period", |
372 | .data = &nlm_grace_period, | |
7ee91ec1 | 373 | .maxlen = sizeof(unsigned long), |
1da177e4 | 374 | .mode = 0644, |
6d456111 | 375 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
376 | .extra1 = (unsigned long *) &nlm_grace_period_min, |
377 | .extra2 = (unsigned long *) &nlm_grace_period_max, | |
378 | }, | |
379 | { | |
1da177e4 LT |
380 | .procname = "nlm_timeout", |
381 | .data = &nlm_timeout, | |
7ee91ec1 | 382 | .maxlen = sizeof(unsigned long), |
1da177e4 | 383 | .mode = 0644, |
6d456111 | 384 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
385 | .extra1 = (unsigned long *) &nlm_timeout_min, |
386 | .extra2 = (unsigned long *) &nlm_timeout_max, | |
387 | }, | |
388 | { | |
1da177e4 LT |
389 | .procname = "nlm_udpport", |
390 | .data = &nlm_udpport, | |
391 | .maxlen = sizeof(int), | |
392 | .mode = 0644, | |
6d456111 | 393 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
394 | .extra1 = (int *) &nlm_port_min, |
395 | .extra2 = (int *) &nlm_port_max, | |
396 | }, | |
397 | { | |
1da177e4 LT |
398 | .procname = "nlm_tcpport", |
399 | .data = &nlm_tcpport, | |
400 | .maxlen = sizeof(int), | |
401 | .mode = 0644, | |
6d456111 | 402 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
403 | .extra1 = (int *) &nlm_port_min, |
404 | .extra2 = (int *) &nlm_port_max, | |
405 | }, | |
abd1f500 | 406 | { |
abd1f500 OK |
407 | .procname = "nsm_use_hostnames", |
408 | .data = &nsm_use_hostnames, | |
409 | .maxlen = sizeof(int), | |
410 | .mode = 0644, | |
6d456111 | 411 | .proc_handler = proc_dointvec, |
abd1f500 | 412 | }, |
460f5cac | 413 | { |
460f5cac OK |
414 | .procname = "nsm_local_state", |
415 | .data = &nsm_local_state, | |
416 | .maxlen = sizeof(int), | |
417 | .mode = 0644, | |
6d456111 | 418 | .proc_handler = proc_dointvec, |
460f5cac | 419 | }, |
ab09203e | 420 | { } |
1da177e4 LT |
421 | }; |
422 | ||
423 | static ctl_table nlm_sysctl_dir[] = { | |
424 | { | |
1da177e4 LT |
425 | .procname = "nfs", |
426 | .mode = 0555, | |
427 | .child = nlm_sysctls, | |
428 | }, | |
ab09203e | 429 | { } |
1da177e4 LT |
430 | }; |
431 | ||
432 | static ctl_table nlm_sysctl_root[] = { | |
433 | { | |
1da177e4 LT |
434 | .procname = "fs", |
435 | .mode = 0555, | |
436 | .child = nlm_sysctl_dir, | |
437 | }, | |
ab09203e | 438 | { } |
1da177e4 LT |
439 | }; |
440 | ||
90d5b180 CL |
441 | #endif /* CONFIG_SYSCTL */ |
442 | ||
1da177e4 | 443 | /* |
405ae7d3 | 444 | * Module (and sysfs) parameters. |
1da177e4 LT |
445 | */ |
446 | ||
447 | #define param_set_min_max(name, type, which_strtol, min, max) \ | |
448 | static int param_set_##name(const char *val, struct kernel_param *kp) \ | |
449 | { \ | |
450 | char *endp; \ | |
451 | __typeof__(type) num = which_strtol(val, &endp, 0); \ | |
452 | if (endp == val || *endp || num < (min) || num > (max)) \ | |
453 | return -EINVAL; \ | |
454 | *((int *) kp->arg) = num; \ | |
455 | return 0; \ | |
456 | } | |
457 | ||
458 | static inline int is_callback(u32 proc) | |
459 | { | |
460 | return proc == NLMPROC_GRANTED | |
461 | || proc == NLMPROC_GRANTED_MSG | |
462 | || proc == NLMPROC_TEST_RES | |
463 | || proc == NLMPROC_LOCK_RES | |
464 | || proc == NLMPROC_CANCEL_RES | |
465 | || proc == NLMPROC_UNLOCK_RES | |
466 | || proc == NLMPROC_NSM_NOTIFY; | |
467 | } | |
468 | ||
469 | ||
470 | static int lockd_authenticate(struct svc_rqst *rqstp) | |
471 | { | |
472 | rqstp->rq_client = NULL; | |
473 | switch (rqstp->rq_authop->flavour) { | |
474 | case RPC_AUTH_NULL: | |
475 | case RPC_AUTH_UNIX: | |
476 | if (rqstp->rq_proc == 0) | |
477 | return SVC_OK; | |
478 | if (is_callback(rqstp->rq_proc)) { | |
479 | /* Leave it to individual procedures to | |
480 | * call nlmsvc_lookup_host(rqstp) | |
481 | */ | |
482 | return SVC_OK; | |
483 | } | |
484 | return svc_set_client(rqstp); | |
485 | } | |
486 | return SVC_DENIED; | |
487 | } | |
488 | ||
489 | ||
490 | param_set_min_max(port, int, simple_strtol, 0, 65535) | |
491 | param_set_min_max(grace_period, unsigned long, simple_strtoul, | |
492 | nlm_grace_period_min, nlm_grace_period_max) | |
493 | param_set_min_max(timeout, unsigned long, simple_strtoul, | |
494 | nlm_timeout_min, nlm_timeout_max) | |
495 | ||
496 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
497 | MODULE_DESCRIPTION("NFS file locking service version " LOCKD_VERSION "."); | |
498 | MODULE_LICENSE("GPL"); | |
499 | ||
500 | module_param_call(nlm_grace_period, param_set_grace_period, param_get_ulong, | |
501 | &nlm_grace_period, 0644); | |
502 | module_param_call(nlm_timeout, param_set_timeout, param_get_ulong, | |
503 | &nlm_timeout, 0644); | |
504 | module_param_call(nlm_udpport, param_set_port, param_get_int, | |
505 | &nlm_udpport, 0644); | |
506 | module_param_call(nlm_tcpport, param_set_port, param_get_int, | |
507 | &nlm_tcpport, 0644); | |
abd1f500 | 508 | module_param(nsm_use_hostnames, bool, 0644); |
c72a476b | 509 | module_param(nlm_max_connections, uint, 0644); |
1da177e4 LT |
510 | |
511 | /* | |
512 | * Initialising and terminating the module. | |
513 | */ | |
514 | ||
515 | static int __init init_nlm(void) | |
516 | { | |
90d5b180 | 517 | #ifdef CONFIG_SYSCTL |
0b4d4147 | 518 | nlm_sysctl_table = register_sysctl_table(nlm_sysctl_root); |
1da177e4 | 519 | return nlm_sysctl_table ? 0 : -ENOMEM; |
90d5b180 CL |
520 | #else |
521 | return 0; | |
522 | #endif | |
1da177e4 LT |
523 | } |
524 | ||
525 | static void __exit exit_nlm(void) | |
526 | { | |
527 | /* FIXME: delete all NLM clients */ | |
528 | nlm_shutdown_hosts(); | |
90d5b180 | 529 | #ifdef CONFIG_SYSCTL |
1da177e4 | 530 | unregister_sysctl_table(nlm_sysctl_table); |
90d5b180 | 531 | #endif |
1da177e4 LT |
532 | } |
533 | ||
534 | module_init(init_nlm); | |
535 | module_exit(exit_nlm); | |
536 | ||
537 | /* | |
538 | * Define NLM program and procedures | |
539 | */ | |
540 | static struct svc_version nlmsvc_version1 = { | |
541 | .vs_vers = 1, | |
542 | .vs_nproc = 17, | |
543 | .vs_proc = nlmsvc_procedures, | |
544 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
545 | }; | |
546 | static struct svc_version nlmsvc_version3 = { | |
547 | .vs_vers = 3, | |
548 | .vs_nproc = 24, | |
549 | .vs_proc = nlmsvc_procedures, | |
550 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
551 | }; | |
552 | #ifdef CONFIG_LOCKD_V4 | |
553 | static struct svc_version nlmsvc_version4 = { | |
554 | .vs_vers = 4, | |
555 | .vs_nproc = 24, | |
556 | .vs_proc = nlmsvc_procedures4, | |
557 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
558 | }; | |
559 | #endif | |
560 | static struct svc_version * nlmsvc_version[] = { | |
561 | [1] = &nlmsvc_version1, | |
562 | [3] = &nlmsvc_version3, | |
563 | #ifdef CONFIG_LOCKD_V4 | |
564 | [4] = &nlmsvc_version4, | |
565 | #endif | |
566 | }; | |
567 | ||
568 | static struct svc_stat nlmsvc_stats; | |
569 | ||
e8c96f8c | 570 | #define NLM_NRVERS ARRAY_SIZE(nlmsvc_version) |
1da177e4 LT |
571 | static struct svc_program nlmsvc_program = { |
572 | .pg_prog = NLM_PROGRAM, /* program number */ | |
573 | .pg_nvers = NLM_NRVERS, /* number of entries in nlmsvc_version */ | |
574 | .pg_vers = nlmsvc_version, /* version table */ | |
575 | .pg_name = "lockd", /* service name */ | |
576 | .pg_class = "nfsd", /* share authentication with nfsd */ | |
577 | .pg_stats = &nlmsvc_stats, /* stats table */ | |
578 | .pg_authenticate = &lockd_authenticate /* export authentication */ | |
579 | }; |