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Commit | Line | Data |
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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 | 24 | #include <linux/smp.h> |
353ab6e9 | 25 | #include <linux/mutex.h> |
d751a7cd | 26 | #include <linux/kthread.h> |
83144186 | 27 | #include <linux/freezer.h> |
1da177e4 LT |
28 | |
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> | |
24e36663 | 34 | #include <net/ip.h> |
1da177e4 LT |
35 | #include <linux/lockd/lockd.h> |
36 | #include <linux/nfs.h> | |
37 | ||
a9c5d73a SK |
38 | #include "netns.h" |
39 | ||
1da177e4 LT |
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 | ||
a9c5d73a SK |
55 | int lockd_net_id; |
56 | ||
1da177e4 LT |
57 | /* |
58 | * These can be set at insmod time (useful for NFS as root filesystem), | |
59 | * and also changed through the sysctl interface. -- Jamie Lokier, Aug 2003 | |
60 | */ | |
61 | static unsigned long nlm_grace_period; | |
62 | static unsigned long nlm_timeout = LOCKD_DFLT_TIMEO; | |
63 | static int nlm_udpport, nlm_tcpport; | |
64 | ||
c72a476b JL |
65 | /* RLIM_NOFILE defaults to 1024. That seems like a reasonable default here. */ |
66 | static unsigned int nlm_max_connections = 1024; | |
67 | ||
1da177e4 LT |
68 | /* |
69 | * Constants needed for the sysctl interface. | |
70 | */ | |
71 | static const unsigned long nlm_grace_period_min = 0; | |
72 | static const unsigned long nlm_grace_period_max = 240; | |
73 | static const unsigned long nlm_timeout_min = 3; | |
74 | static const unsigned long nlm_timeout_max = 20; | |
75 | static const int nlm_port_min = 0, nlm_port_max = 65535; | |
76 | ||
90d5b180 | 77 | #ifdef CONFIG_SYSCTL |
1da177e4 | 78 | static struct ctl_table_header * nlm_sysctl_table; |
90d5b180 | 79 | #endif |
1da177e4 | 80 | |
9a8db97e | 81 | static unsigned long get_lockd_grace_period(void) |
1da177e4 | 82 | { |
1da177e4 LT |
83 | /* Note: nlm_timeout should always be nonzero */ |
84 | if (nlm_grace_period) | |
9a8db97e | 85 | return roundup(nlm_grace_period, nlm_timeout) * HZ; |
1da177e4 | 86 | else |
9a8db97e ME |
87 | return nlm_timeout * 5 * HZ; |
88 | } | |
89 | ||
08d44a35 | 90 | static void grace_ender(struct work_struct *grace) |
9a8db97e | 91 | { |
08d44a35 SK |
92 | struct delayed_work *dwork = container_of(grace, struct delayed_work, |
93 | work); | |
94 | struct lockd_net *ln = container_of(dwork, struct lockd_net, | |
95 | grace_period_end); | |
96 | ||
97 | locks_end_grace(&ln->lockd_manager); | |
1da177e4 LT |
98 | } |
99 | ||
5ccb0066 | 100 | static void set_grace_period(struct net *net) |
1da177e4 | 101 | { |
af558e33 | 102 | unsigned long grace_period = get_lockd_grace_period(); |
5ccb0066 | 103 | struct lockd_net *ln = net_generic(net, lockd_net_id); |
c8ab5f2a | 104 | |
5ccb0066 | 105 | locks_start_grace(net, &ln->lockd_manager); |
66547b02 SK |
106 | cancel_delayed_work_sync(&ln->grace_period_end); |
107 | schedule_delayed_work(&ln->grace_period_end, grace_period); | |
1da177e4 LT |
108 | } |
109 | ||
89996df4 BF |
110 | static void restart_grace(void) |
111 | { | |
112 | if (nlmsvc_ops) { | |
5ccb0066 SK |
113 | struct net *net = &init_net; |
114 | struct lockd_net *ln = net_generic(net, lockd_net_id); | |
66547b02 SK |
115 | |
116 | cancel_delayed_work_sync(&ln->grace_period_end); | |
08d44a35 | 117 | locks_end_grace(&ln->lockd_manager); |
89996df4 | 118 | nlmsvc_invalidate_all(); |
5ccb0066 | 119 | set_grace_period(net); |
89996df4 BF |
120 | } |
121 | } | |
122 | ||
1da177e4 LT |
123 | /* |
124 | * This is the lockd kernel thread | |
125 | */ | |
d751a7cd JL |
126 | static int |
127 | lockd(void *vrqstp) | |
1da177e4 | 128 | { |
5b444cc9 | 129 | int err = 0; |
d751a7cd | 130 | struct svc_rqst *rqstp = vrqstp; |
1da177e4 | 131 | |
d751a7cd | 132 | /* try_to_freeze() is called from svc_recv() */ |
83144186 | 133 | set_freezable(); |
1da177e4 | 134 | |
d751a7cd | 135 | /* Allow SIGKILL to tell lockd to drop all of its locks */ |
1da177e4 LT |
136 | allow_signal(SIGKILL); |
137 | ||
1da177e4 LT |
138 | dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n"); |
139 | ||
140 | if (!nlm_timeout) | |
141 | nlm_timeout = LOCKD_DFLT_TIMEO; | |
142 | nlmsvc_timeout = nlm_timeout * HZ; | |
143 | ||
1da177e4 LT |
144 | /* |
145 | * The main request loop. We don't terminate until the last | |
d751a7cd | 146 | * NFS mount or NFS daemon has gone away. |
1da177e4 | 147 | */ |
d751a7cd | 148 | while (!kthread_should_stop()) { |
1da177e4 | 149 | long timeout = MAX_SCHEDULE_TIMEOUT; |
5216a8e7 | 150 | RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); |
1da177e4 | 151 | |
c72a476b JL |
152 | /* update sv_maxconn if it has changed */ |
153 | rqstp->rq_server->sv_maxconn = nlm_max_connections; | |
154 | ||
1da177e4 LT |
155 | if (signalled()) { |
156 | flush_signals(current); | |
89996df4 | 157 | restart_grace(); |
d751a7cd | 158 | continue; |
1da177e4 LT |
159 | } |
160 | ||
8fafa900 BF |
161 | timeout = nlmsvc_retry_blocked(); |
162 | ||
1da177e4 LT |
163 | /* |
164 | * Find a socket with data available and call its | |
165 | * recvfrom routine. | |
166 | */ | |
6fb2b47f | 167 | err = svc_recv(rqstp, timeout); |
5b444cc9 | 168 | if (err == -EAGAIN || err == -EINTR) |
1da177e4 | 169 | continue; |
ad06e4bd CL |
170 | dprintk("lockd: request from %s\n", |
171 | svc_print_addr(rqstp, buf, sizeof(buf))); | |
1da177e4 | 172 | |
6fb2b47f | 173 | svc_process(rqstp); |
1da177e4 | 174 | } |
2bd61579 | 175 | flush_signals(current); |
d751a7cd JL |
176 | if (nlmsvc_ops) |
177 | nlmsvc_invalidate_all(); | |
178 | nlm_shutdown_hosts(); | |
d751a7cd | 179 | return 0; |
1da177e4 LT |
180 | } |
181 | ||
eb16e907 | 182 | static int create_lockd_listener(struct svc_serv *serv, const char *name, |
c228fa20 SK |
183 | struct net *net, const int family, |
184 | const unsigned short port) | |
d3fe5ea7 CL |
185 | { |
186 | struct svc_xprt *xprt; | |
187 | ||
c228fa20 | 188 | xprt = svc_find_xprt(serv, name, net, family, 0); |
d3fe5ea7 | 189 | if (xprt == NULL) |
c228fa20 | 190 | return svc_create_xprt(serv, name, net, family, port, |
eb16e907 | 191 | SVC_SOCK_DEFAULTS); |
d3fe5ea7 CL |
192 | svc_xprt_put(xprt); |
193 | return 0; | |
194 | } | |
195 | ||
c228fa20 SK |
196 | static int create_lockd_family(struct svc_serv *serv, struct net *net, |
197 | const int family) | |
eb16e907 CL |
198 | { |
199 | int err; | |
200 | ||
c228fa20 | 201 | err = create_lockd_listener(serv, "udp", net, family, nlm_udpport); |
eb16e907 CL |
202 | if (err < 0) |
203 | return err; | |
204 | ||
c228fa20 | 205 | return create_lockd_listener(serv, "tcp", net, family, nlm_tcpport); |
eb16e907 CL |
206 | } |
207 | ||
482fb94e | 208 | /* |
8c3916f4 CL |
209 | * Ensure there are active UDP and TCP listeners for lockd. |
210 | * | |
211 | * Even if we have only TCP NFS mounts and/or TCP NFSDs, some | |
212 | * local services (such as rpc.statd) still require UDP, and | |
213 | * some NFS servers do not yet support NLM over TCP. | |
214 | * | |
215 | * Returns zero if all listeners are available; otherwise a | |
216 | * negative errno value is returned. | |
482fb94e | 217 | */ |
c228fa20 | 218 | static int make_socks(struct svc_serv *serv, struct net *net) |
24e36663 | 219 | { |
482fb94e | 220 | static int warned; |
0dba7c2a | 221 | int err; |
482fb94e | 222 | |
c228fa20 | 223 | err = create_lockd_family(serv, net, PF_INET); |
0dba7c2a CL |
224 | if (err < 0) |
225 | goto out_err; | |
226 | ||
c228fa20 | 227 | err = create_lockd_family(serv, net, PF_INET6); |
eb16e907 | 228 | if (err < 0 && err != -EAFNOSUPPORT) |
0dba7c2a CL |
229 | goto out_err; |
230 | ||
231 | warned = 0; | |
232 | return 0; | |
233 | ||
234 | out_err: | |
235 | if (warned++ == 0) | |
7dcf91ec | 236 | printk(KERN_WARNING |
0dba7c2a | 237 | "lockd_up: makesock failed, error=%d\n", err); |
24e36663 N |
238 | return err; |
239 | } | |
240 | ||
4db77695 | 241 | static int lockd_up_net(struct svc_serv *serv, struct net *net) |
bb2224df SK |
242 | { |
243 | struct lockd_net *ln = net_generic(net, lockd_net_id); | |
bb2224df SK |
244 | int error; |
245 | ||
786185b5 | 246 | if (ln->nlmsvc_users++) |
bb2224df SK |
247 | return 0; |
248 | ||
dbf9b5d7 | 249 | error = svc_bind(serv, net); |
bb2224df | 250 | if (error) |
dbf9b5d7 | 251 | goto err_bind; |
bb2224df SK |
252 | |
253 | error = make_socks(serv, net); | |
254 | if (error < 0) | |
255 | goto err_socks; | |
5630f7fa | 256 | set_grace_period(net); |
8dbf28e4 | 257 | dprintk("lockd_up_net: per-net data created; net=%p\n", net); |
bb2224df SK |
258 | return 0; |
259 | ||
260 | err_socks: | |
261 | svc_rpcb_cleanup(serv, net); | |
dbf9b5d7 | 262 | err_bind: |
786185b5 | 263 | ln->nlmsvc_users--; |
bb2224df SK |
264 | return error; |
265 | } | |
266 | ||
4db77695 | 267 | static void lockd_down_net(struct svc_serv *serv, struct net *net) |
bb2224df SK |
268 | { |
269 | struct lockd_net *ln = net_generic(net, lockd_net_id); | |
bb2224df SK |
270 | |
271 | if (ln->nlmsvc_users) { | |
3b64739f SK |
272 | if (--ln->nlmsvc_users == 0) { |
273 | nlm_shutdown_hosts_net(net); | |
5630f7fa SK |
274 | cancel_delayed_work_sync(&ln->grace_period_end); |
275 | locks_end_grace(&ln->lockd_manager); | |
bb2224df | 276 | svc_shutdown_net(serv, net); |
8dbf28e4 | 277 | dprintk("lockd_down_net: per-net data destroyed; net=%p\n", net); |
3b64739f | 278 | } |
bb2224df SK |
279 | } else { |
280 | printk(KERN_ERR "lockd_down_net: no users! task=%p, net=%p\n", | |
281 | nlmsvc_task, net); | |
282 | BUG(); | |
283 | } | |
284 | } | |
285 | ||
3d1221df SK |
286 | static int lockd_start_svc(struct svc_serv *serv) |
287 | { | |
288 | int error; | |
289 | ||
290 | if (nlmsvc_rqst) | |
291 | return 0; | |
292 | ||
293 | /* | |
294 | * Create the kernel thread and wait for it to start. | |
295 | */ | |
296 | nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE); | |
297 | if (IS_ERR(nlmsvc_rqst)) { | |
298 | error = PTR_ERR(nlmsvc_rqst); | |
299 | printk(KERN_WARNING | |
300 | "lockd_up: svc_rqst allocation failed, error=%d\n", | |
301 | error); | |
302 | goto out_rqst; | |
303 | } | |
304 | ||
305 | svc_sock_update_bufs(serv); | |
306 | serv->sv_maxconn = nlm_max_connections; | |
307 | ||
308 | nlmsvc_task = kthread_run(lockd, nlmsvc_rqst, serv->sv_name); | |
309 | if (IS_ERR(nlmsvc_task)) { | |
310 | error = PTR_ERR(nlmsvc_task); | |
311 | printk(KERN_WARNING | |
312 | "lockd_up: kthread_run failed, error=%d\n", error); | |
313 | goto out_task; | |
314 | } | |
315 | dprintk("lockd_up: service started\n"); | |
316 | return 0; | |
317 | ||
318 | out_task: | |
319 | svc_exit_thread(nlmsvc_rqst); | |
320 | nlmsvc_task = NULL; | |
321 | out_rqst: | |
322 | nlmsvc_rqst = NULL; | |
323 | return error; | |
324 | } | |
325 | ||
24452239 | 326 | static struct svc_serv *lockd_create_svc(void) |
1da177e4 | 327 | { |
d751a7cd | 328 | struct svc_serv *serv; |
1da177e4 | 329 | |
1da177e4 LT |
330 | /* |
331 | * Check whether we're already up and running. | |
332 | */ | |
bb2224df | 333 | if (nlmsvc_rqst) { |
24452239 SK |
334 | /* |
335 | * Note: increase service usage, because later in case of error | |
336 | * svc_destroy() will be called. | |
337 | */ | |
338 | svc_get(nlmsvc_rqst->rq_server); | |
339 | return nlmsvc_rqst->rq_server; | |
bb2224df | 340 | } |
1da177e4 LT |
341 | |
342 | /* | |
343 | * Sanity check: if there's no pid, | |
344 | * we should be the first user ... | |
345 | */ | |
4a3ae42d | 346 | if (nlmsvc_users) |
1da177e4 LT |
347 | printk(KERN_WARNING |
348 | "lockd_up: no pid, %d users??\n", nlmsvc_users); | |
349 | ||
49a9072f | 350 | serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, NULL); |
1da177e4 LT |
351 | if (!serv) { |
352 | printk(KERN_WARNING "lockd_up: create service failed\n"); | |
24452239 SK |
353 | return ERR_PTR(-ENOMEM); |
354 | } | |
8dbf28e4 | 355 | dprintk("lockd_up: service created\n"); |
24452239 SK |
356 | return serv; |
357 | } | |
358 | ||
359 | /* | |
360 | * Bring up the lockd process if it's not already up. | |
361 | */ | |
362 | int lockd_up(struct net *net) | |
363 | { | |
364 | struct svc_serv *serv; | |
7d13ec76 | 365 | int error; |
24452239 SK |
366 | |
367 | mutex_lock(&nlmsvc_mutex); | |
368 | ||
369 | serv = lockd_create_svc(); | |
370 | if (IS_ERR(serv)) { | |
371 | error = PTR_ERR(serv); | |
372 | goto err_create; | |
1da177e4 LT |
373 | } |
374 | ||
dbf9b5d7 | 375 | error = lockd_up_net(serv, net); |
8c3916f4 | 376 | if (error < 0) |
dbf9b5d7 | 377 | goto err_net; |
1da177e4 | 378 | |
3d1221df SK |
379 | error = lockd_start_svc(serv); |
380 | if (error < 0) | |
786185b5 | 381 | goto err_start; |
1da177e4 | 382 | |
7d13ec76 | 383 | nlmsvc_users++; |
1da177e4 LT |
384 | /* |
385 | * Note: svc_serv structures have an initial use count of 1, | |
386 | * so we exit through here on both success and failure. | |
387 | */ | |
dbf9b5d7 | 388 | err_net: |
1da177e4 | 389 | svc_destroy(serv); |
24452239 | 390 | err_create: |
353ab6e9 | 391 | mutex_unlock(&nlmsvc_mutex); |
1da177e4 | 392 | return error; |
786185b5 SK |
393 | |
394 | err_start: | |
4db77695 | 395 | lockd_down_net(serv, net); |
dbf9b5d7 | 396 | goto err_net; |
1da177e4 | 397 | } |
2de59872 | 398 | EXPORT_SYMBOL_GPL(lockd_up); |
1da177e4 LT |
399 | |
400 | /* | |
401 | * Decrement the user count and bring down lockd if we're the last. | |
402 | */ | |
403 | void | |
e3f70ead | 404 | lockd_down(struct net *net) |
1da177e4 | 405 | { |
353ab6e9 | 406 | mutex_lock(&nlmsvc_mutex); |
4db77695 | 407 | lockd_down_net(nlmsvc_rqst->rq_server, net); |
1da177e4 | 408 | if (nlmsvc_users) { |
786185b5 | 409 | if (--nlmsvc_users) |
1da177e4 | 410 | goto out; |
d751a7cd JL |
411 | } else { |
412 | printk(KERN_ERR "lockd_down: no users! task=%p\n", | |
413 | nlmsvc_task); | |
414 | BUG(); | |
1da177e4 | 415 | } |
1da177e4 | 416 | |
d751a7cd JL |
417 | if (!nlmsvc_task) { |
418 | printk(KERN_ERR "lockd_down: no lockd running.\n"); | |
419 | BUG(); | |
1da177e4 | 420 | } |
d751a7cd | 421 | kthread_stop(nlmsvc_task); |
8dbf28e4 | 422 | dprintk("lockd_down: service stopped\n"); |
abd1ec4e | 423 | svc_exit_thread(nlmsvc_rqst); |
8dbf28e4 | 424 | dprintk("lockd_down: service destroyed\n"); |
abd1ec4e JL |
425 | nlmsvc_task = NULL; |
426 | nlmsvc_rqst = NULL; | |
1da177e4 | 427 | out: |
353ab6e9 | 428 | mutex_unlock(&nlmsvc_mutex); |
1da177e4 | 429 | } |
2de59872 | 430 | EXPORT_SYMBOL_GPL(lockd_down); |
1da177e4 | 431 | |
90d5b180 CL |
432 | #ifdef CONFIG_SYSCTL |
433 | ||
1da177e4 LT |
434 | /* |
435 | * Sysctl parameters (same as module parameters, different interface). | |
436 | */ | |
437 | ||
1da177e4 LT |
438 | static ctl_table nlm_sysctls[] = { |
439 | { | |
1da177e4 LT |
440 | .procname = "nlm_grace_period", |
441 | .data = &nlm_grace_period, | |
7ee91ec1 | 442 | .maxlen = sizeof(unsigned long), |
1da177e4 | 443 | .mode = 0644, |
6d456111 | 444 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
445 | .extra1 = (unsigned long *) &nlm_grace_period_min, |
446 | .extra2 = (unsigned long *) &nlm_grace_period_max, | |
447 | }, | |
448 | { | |
1da177e4 LT |
449 | .procname = "nlm_timeout", |
450 | .data = &nlm_timeout, | |
7ee91ec1 | 451 | .maxlen = sizeof(unsigned long), |
1da177e4 | 452 | .mode = 0644, |
6d456111 | 453 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
454 | .extra1 = (unsigned long *) &nlm_timeout_min, |
455 | .extra2 = (unsigned long *) &nlm_timeout_max, | |
456 | }, | |
457 | { | |
1da177e4 LT |
458 | .procname = "nlm_udpport", |
459 | .data = &nlm_udpport, | |
460 | .maxlen = sizeof(int), | |
461 | .mode = 0644, | |
6d456111 | 462 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
463 | .extra1 = (int *) &nlm_port_min, |
464 | .extra2 = (int *) &nlm_port_max, | |
465 | }, | |
466 | { | |
1da177e4 LT |
467 | .procname = "nlm_tcpport", |
468 | .data = &nlm_tcpport, | |
469 | .maxlen = sizeof(int), | |
470 | .mode = 0644, | |
6d456111 | 471 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
472 | .extra1 = (int *) &nlm_port_min, |
473 | .extra2 = (int *) &nlm_port_max, | |
474 | }, | |
abd1f500 | 475 | { |
abd1f500 OK |
476 | .procname = "nsm_use_hostnames", |
477 | .data = &nsm_use_hostnames, | |
478 | .maxlen = sizeof(int), | |
479 | .mode = 0644, | |
6d456111 | 480 | .proc_handler = proc_dointvec, |
abd1f500 | 481 | }, |
460f5cac | 482 | { |
460f5cac OK |
483 | .procname = "nsm_local_state", |
484 | .data = &nsm_local_state, | |
485 | .maxlen = sizeof(int), | |
486 | .mode = 0644, | |
6d456111 | 487 | .proc_handler = proc_dointvec, |
460f5cac | 488 | }, |
ab09203e | 489 | { } |
1da177e4 LT |
490 | }; |
491 | ||
492 | static ctl_table nlm_sysctl_dir[] = { | |
493 | { | |
1da177e4 LT |
494 | .procname = "nfs", |
495 | .mode = 0555, | |
496 | .child = nlm_sysctls, | |
497 | }, | |
ab09203e | 498 | { } |
1da177e4 LT |
499 | }; |
500 | ||
501 | static ctl_table nlm_sysctl_root[] = { | |
502 | { | |
1da177e4 LT |
503 | .procname = "fs", |
504 | .mode = 0555, | |
505 | .child = nlm_sysctl_dir, | |
506 | }, | |
ab09203e | 507 | { } |
1da177e4 LT |
508 | }; |
509 | ||
90d5b180 CL |
510 | #endif /* CONFIG_SYSCTL */ |
511 | ||
1da177e4 | 512 | /* |
405ae7d3 | 513 | * Module (and sysfs) parameters. |
1da177e4 LT |
514 | */ |
515 | ||
516 | #define param_set_min_max(name, type, which_strtol, min, max) \ | |
517 | static int param_set_##name(const char *val, struct kernel_param *kp) \ | |
518 | { \ | |
519 | char *endp; \ | |
520 | __typeof__(type) num = which_strtol(val, &endp, 0); \ | |
521 | if (endp == val || *endp || num < (min) || num > (max)) \ | |
522 | return -EINVAL; \ | |
de5b8e8e | 523 | *((type *) kp->arg) = num; \ |
1da177e4 LT |
524 | return 0; \ |
525 | } | |
526 | ||
527 | static inline int is_callback(u32 proc) | |
528 | { | |
529 | return proc == NLMPROC_GRANTED | |
530 | || proc == NLMPROC_GRANTED_MSG | |
531 | || proc == NLMPROC_TEST_RES | |
532 | || proc == NLMPROC_LOCK_RES | |
533 | || proc == NLMPROC_CANCEL_RES | |
534 | || proc == NLMPROC_UNLOCK_RES | |
535 | || proc == NLMPROC_NSM_NOTIFY; | |
536 | } | |
537 | ||
538 | ||
539 | static int lockd_authenticate(struct svc_rqst *rqstp) | |
540 | { | |
541 | rqstp->rq_client = NULL; | |
542 | switch (rqstp->rq_authop->flavour) { | |
543 | case RPC_AUTH_NULL: | |
544 | case RPC_AUTH_UNIX: | |
545 | if (rqstp->rq_proc == 0) | |
546 | return SVC_OK; | |
547 | if (is_callback(rqstp->rq_proc)) { | |
548 | /* Leave it to individual procedures to | |
549 | * call nlmsvc_lookup_host(rqstp) | |
550 | */ | |
551 | return SVC_OK; | |
552 | } | |
553 | return svc_set_client(rqstp); | |
554 | } | |
555 | return SVC_DENIED; | |
556 | } | |
557 | ||
558 | ||
559 | param_set_min_max(port, int, simple_strtol, 0, 65535) | |
560 | param_set_min_max(grace_period, unsigned long, simple_strtoul, | |
561 | nlm_grace_period_min, nlm_grace_period_max) | |
562 | param_set_min_max(timeout, unsigned long, simple_strtoul, | |
563 | nlm_timeout_min, nlm_timeout_max) | |
564 | ||
565 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
566 | MODULE_DESCRIPTION("NFS file locking service version " LOCKD_VERSION "."); | |
567 | MODULE_LICENSE("GPL"); | |
568 | ||
569 | module_param_call(nlm_grace_period, param_set_grace_period, param_get_ulong, | |
570 | &nlm_grace_period, 0644); | |
571 | module_param_call(nlm_timeout, param_set_timeout, param_get_ulong, | |
572 | &nlm_timeout, 0644); | |
573 | module_param_call(nlm_udpport, param_set_port, param_get_int, | |
574 | &nlm_udpport, 0644); | |
575 | module_param_call(nlm_tcpport, param_set_port, param_get_int, | |
576 | &nlm_tcpport, 0644); | |
abd1f500 | 577 | module_param(nsm_use_hostnames, bool, 0644); |
c72a476b | 578 | module_param(nlm_max_connections, uint, 0644); |
1da177e4 | 579 | |
a9c5d73a SK |
580 | static int lockd_init_net(struct net *net) |
581 | { | |
66547b02 SK |
582 | struct lockd_net *ln = net_generic(net, lockd_net_id); |
583 | ||
584 | INIT_DELAYED_WORK(&ln->grace_period_end, grace_ender); | |
db9c4553 | 585 | INIT_LIST_HEAD(&ln->grace_list); |
e9406db2 | 586 | spin_lock_init(&ln->nsm_clnt_lock); |
a9c5d73a SK |
587 | return 0; |
588 | } | |
589 | ||
590 | static void lockd_exit_net(struct net *net) | |
591 | { | |
592 | } | |
593 | ||
594 | static struct pernet_operations lockd_net_ops = { | |
595 | .init = lockd_init_net, | |
596 | .exit = lockd_exit_net, | |
597 | .id = &lockd_net_id, | |
598 | .size = sizeof(struct lockd_net), | |
599 | }; | |
600 | ||
601 | ||
1da177e4 LT |
602 | /* |
603 | * Initialising and terminating the module. | |
604 | */ | |
605 | ||
606 | static int __init init_nlm(void) | |
607 | { | |
a9c5d73a SK |
608 | int err; |
609 | ||
90d5b180 | 610 | #ifdef CONFIG_SYSCTL |
a9c5d73a | 611 | err = -ENOMEM; |
0b4d4147 | 612 | nlm_sysctl_table = register_sysctl_table(nlm_sysctl_root); |
a9c5d73a SK |
613 | if (nlm_sysctl_table == NULL) |
614 | goto err_sysctl; | |
615 | #endif | |
616 | err = register_pernet_subsys(&lockd_net_ops); | |
617 | if (err) | |
618 | goto err_pernet; | |
90d5b180 | 619 | return 0; |
a9c5d73a SK |
620 | |
621 | err_pernet: | |
622 | #ifdef CONFIG_SYSCTL | |
623 | unregister_sysctl_table(nlm_sysctl_table); | |
90d5b180 | 624 | #endif |
a9c5d73a SK |
625 | err_sysctl: |
626 | return err; | |
1da177e4 LT |
627 | } |
628 | ||
629 | static void __exit exit_nlm(void) | |
630 | { | |
631 | /* FIXME: delete all NLM clients */ | |
632 | nlm_shutdown_hosts(); | |
a9c5d73a | 633 | unregister_pernet_subsys(&lockd_net_ops); |
90d5b180 | 634 | #ifdef CONFIG_SYSCTL |
1da177e4 | 635 | unregister_sysctl_table(nlm_sysctl_table); |
90d5b180 | 636 | #endif |
1da177e4 LT |
637 | } |
638 | ||
639 | module_init(init_nlm); | |
640 | module_exit(exit_nlm); | |
641 | ||
642 | /* | |
643 | * Define NLM program and procedures | |
644 | */ | |
645 | static struct svc_version nlmsvc_version1 = { | |
646 | .vs_vers = 1, | |
647 | .vs_nproc = 17, | |
648 | .vs_proc = nlmsvc_procedures, | |
649 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
650 | }; | |
651 | static struct svc_version nlmsvc_version3 = { | |
652 | .vs_vers = 3, | |
653 | .vs_nproc = 24, | |
654 | .vs_proc = nlmsvc_procedures, | |
655 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
656 | }; | |
657 | #ifdef CONFIG_LOCKD_V4 | |
658 | static struct svc_version nlmsvc_version4 = { | |
659 | .vs_vers = 4, | |
660 | .vs_nproc = 24, | |
661 | .vs_proc = nlmsvc_procedures4, | |
662 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
663 | }; | |
664 | #endif | |
665 | static struct svc_version * nlmsvc_version[] = { | |
666 | [1] = &nlmsvc_version1, | |
667 | [3] = &nlmsvc_version3, | |
668 | #ifdef CONFIG_LOCKD_V4 | |
669 | [4] = &nlmsvc_version4, | |
670 | #endif | |
671 | }; | |
672 | ||
673 | static struct svc_stat nlmsvc_stats; | |
674 | ||
e8c96f8c | 675 | #define NLM_NRVERS ARRAY_SIZE(nlmsvc_version) |
1da177e4 LT |
676 | static struct svc_program nlmsvc_program = { |
677 | .pg_prog = NLM_PROGRAM, /* program number */ | |
678 | .pg_nvers = NLM_NRVERS, /* number of entries in nlmsvc_version */ | |
679 | .pg_vers = nlmsvc_version, /* version table */ | |
680 | .pg_name = "lockd", /* service name */ | |
681 | .pg_class = "nfsd", /* share authentication with nfsd */ | |
682 | .pg_stats = &nlmsvc_stats, /* stats table */ | |
683 | .pg_authenticate = &lockd_authenticate /* export authentication */ | |
684 | }; |