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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 | ||
3f07c014 | 20 | #include <linux/sched/signal.h> |
1da177e4 LT |
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> |
0751ddf7 | 28 | #include <linux/inetdevice.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> | |
0751ddf7 | 35 | #include <linux/sunrpc/svc_xprt.h> |
24e36663 | 36 | #include <net/ip.h> |
0751ddf7 SM |
37 | #include <net/addrconf.h> |
38 | #include <net/ipv6.h> | |
1da177e4 LT |
39 | #include <linux/lockd/lockd.h> |
40 | #include <linux/nfs.h> | |
41 | ||
a9c5d73a | 42 | #include "netns.h" |
d68e3c4a | 43 | #include "procfs.h" |
a9c5d73a | 44 | |
1da177e4 LT |
45 | #define NLMDBG_FACILITY NLMDBG_SVC |
46 | #define LOCKD_BUFSIZE (1024 + NLMSVC_XDRSIZE) | |
47 | #define ALLOWED_SIGS (sigmask(SIGKILL)) | |
48 | ||
49 | static struct svc_program nlmsvc_program; | |
50 | ||
2a297450 | 51 | const struct nlmsvc_binding *nlmsvc_ops; |
2de59872 | 52 | EXPORT_SYMBOL_GPL(nlmsvc_ops); |
1da177e4 | 53 | |
353ab6e9 | 54 | static DEFINE_MUTEX(nlmsvc_mutex); |
1da177e4 | 55 | static unsigned int nlmsvc_users; |
d751a7cd | 56 | static struct task_struct *nlmsvc_task; |
abd1ec4e | 57 | static struct svc_rqst *nlmsvc_rqst; |
1da177e4 LT |
58 | unsigned long nlmsvc_timeout; |
59 | ||
c7d03a00 | 60 | unsigned int lockd_net_id; |
a9c5d73a | 61 | |
1da177e4 LT |
62 | /* |
63 | * These can be set at insmod time (useful for NFS as root filesystem), | |
64 | * and also changed through the sysctl interface. -- Jamie Lokier, Aug 2003 | |
65 | */ | |
66 | static unsigned long nlm_grace_period; | |
67 | static unsigned long nlm_timeout = LOCKD_DFLT_TIMEO; | |
68 | static int nlm_udpport, nlm_tcpport; | |
69 | ||
c72a476b JL |
70 | /* RLIM_NOFILE defaults to 1024. That seems like a reasonable default here. */ |
71 | static unsigned int nlm_max_connections = 1024; | |
72 | ||
1da177e4 LT |
73 | /* |
74 | * Constants needed for the sysctl interface. | |
75 | */ | |
76 | static const unsigned long nlm_grace_period_min = 0; | |
77 | static const unsigned long nlm_grace_period_max = 240; | |
78 | static const unsigned long nlm_timeout_min = 3; | |
79 | static const unsigned long nlm_timeout_max = 20; | |
80 | static const int nlm_port_min = 0, nlm_port_max = 65535; | |
81 | ||
90d5b180 | 82 | #ifdef CONFIG_SYSCTL |
1da177e4 | 83 | static struct ctl_table_header * nlm_sysctl_table; |
90d5b180 | 84 | #endif |
1da177e4 | 85 | |
9a8db97e | 86 | static unsigned long get_lockd_grace_period(void) |
1da177e4 | 87 | { |
1da177e4 LT |
88 | /* Note: nlm_timeout should always be nonzero */ |
89 | if (nlm_grace_period) | |
9a8db97e | 90 | return roundup(nlm_grace_period, nlm_timeout) * HZ; |
1da177e4 | 91 | else |
9a8db97e ME |
92 | return nlm_timeout * 5 * HZ; |
93 | } | |
94 | ||
08d44a35 | 95 | static void grace_ender(struct work_struct *grace) |
9a8db97e | 96 | { |
ea44463f | 97 | struct delayed_work *dwork = to_delayed_work(grace); |
08d44a35 SK |
98 | struct lockd_net *ln = container_of(dwork, struct lockd_net, |
99 | grace_period_end); | |
100 | ||
101 | locks_end_grace(&ln->lockd_manager); | |
1da177e4 LT |
102 | } |
103 | ||
5ccb0066 | 104 | static void set_grace_period(struct net *net) |
1da177e4 | 105 | { |
af558e33 | 106 | unsigned long grace_period = get_lockd_grace_period(); |
5ccb0066 | 107 | struct lockd_net *ln = net_generic(net, lockd_net_id); |
c8ab5f2a | 108 | |
5ccb0066 | 109 | locks_start_grace(net, &ln->lockd_manager); |
66547b02 SK |
110 | cancel_delayed_work_sync(&ln->grace_period_end); |
111 | schedule_delayed_work(&ln->grace_period_end, grace_period); | |
1da177e4 LT |
112 | } |
113 | ||
89996df4 BF |
114 | static void restart_grace(void) |
115 | { | |
116 | if (nlmsvc_ops) { | |
5ccb0066 SK |
117 | struct net *net = &init_net; |
118 | struct lockd_net *ln = net_generic(net, lockd_net_id); | |
66547b02 SK |
119 | |
120 | cancel_delayed_work_sync(&ln->grace_period_end); | |
08d44a35 | 121 | locks_end_grace(&ln->lockd_manager); |
89996df4 | 122 | nlmsvc_invalidate_all(); |
5ccb0066 | 123 | set_grace_period(net); |
89996df4 BF |
124 | } |
125 | } | |
126 | ||
1da177e4 LT |
127 | /* |
128 | * This is the lockd kernel thread | |
129 | */ | |
d751a7cd JL |
130 | static int |
131 | lockd(void *vrqstp) | |
1da177e4 | 132 | { |
5b444cc9 | 133 | int err = 0; |
d751a7cd | 134 | struct svc_rqst *rqstp = vrqstp; |
1da177e4 | 135 | |
d751a7cd | 136 | /* try_to_freeze() is called from svc_recv() */ |
83144186 | 137 | set_freezable(); |
1da177e4 | 138 | |
d751a7cd | 139 | /* Allow SIGKILL to tell lockd to drop all of its locks */ |
1da177e4 LT |
140 | allow_signal(SIGKILL); |
141 | ||
1da177e4 LT |
142 | dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n"); |
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); |
679b033d | 238 | svc_shutdown_net(serv, net); |
24e36663 N |
239 | return err; |
240 | } | |
241 | ||
4db77695 | 242 | static int lockd_up_net(struct svc_serv *serv, struct net *net) |
bb2224df SK |
243 | { |
244 | struct lockd_net *ln = net_generic(net, lockd_net_id); | |
bb2224df SK |
245 | int error; |
246 | ||
786185b5 | 247 | if (ln->nlmsvc_users++) |
bb2224df SK |
248 | return 0; |
249 | ||
dbf9b5d7 | 250 | error = svc_bind(serv, net); |
bb2224df | 251 | if (error) |
dbf9b5d7 | 252 | goto err_bind; |
bb2224df SK |
253 | |
254 | error = make_socks(serv, net); | |
255 | if (error < 0) | |
7c17705e | 256 | goto err_bind; |
5630f7fa | 257 | set_grace_period(net); |
8dbf28e4 | 258 | dprintk("lockd_up_net: per-net data created; net=%p\n", net); |
bb2224df SK |
259 | return 0; |
260 | ||
dbf9b5d7 | 261 | err_bind: |
786185b5 | 262 | ln->nlmsvc_users--; |
bb2224df SK |
263 | return error; |
264 | } | |
265 | ||
4db77695 | 266 | static void lockd_down_net(struct svc_serv *serv, struct net *net) |
bb2224df SK |
267 | { |
268 | struct lockd_net *ln = net_generic(net, lockd_net_id); | |
bb2224df SK |
269 | |
270 | if (ln->nlmsvc_users) { | |
3b64739f SK |
271 | if (--ln->nlmsvc_users == 0) { |
272 | nlm_shutdown_hosts_net(net); | |
5630f7fa SK |
273 | cancel_delayed_work_sync(&ln->grace_period_end); |
274 | locks_end_grace(&ln->lockd_manager); | |
bb2224df | 275 | svc_shutdown_net(serv, net); |
8dbf28e4 | 276 | dprintk("lockd_down_net: per-net data destroyed; net=%p\n", net); |
3b64739f | 277 | } |
bb2224df SK |
278 | } else { |
279 | printk(KERN_ERR "lockd_down_net: no users! task=%p, net=%p\n", | |
280 | nlmsvc_task, net); | |
281 | BUG(); | |
282 | } | |
283 | } | |
284 | ||
0751ddf7 SM |
285 | static int lockd_inetaddr_event(struct notifier_block *this, |
286 | unsigned long event, void *ptr) | |
287 | { | |
288 | struct in_ifaddr *ifa = (struct in_ifaddr *)ptr; | |
289 | struct sockaddr_in sin; | |
290 | ||
291 | if (event != NETDEV_DOWN) | |
292 | goto out; | |
293 | ||
294 | if (nlmsvc_rqst) { | |
295 | dprintk("lockd_inetaddr_event: removed %pI4\n", | |
296 | &ifa->ifa_local); | |
297 | sin.sin_family = AF_INET; | |
298 | sin.sin_addr.s_addr = ifa->ifa_local; | |
299 | svc_age_temp_xprts_now(nlmsvc_rqst->rq_server, | |
300 | (struct sockaddr *)&sin); | |
301 | } | |
302 | ||
303 | out: | |
304 | return NOTIFY_DONE; | |
305 | } | |
306 | ||
307 | static struct notifier_block lockd_inetaddr_notifier = { | |
308 | .notifier_call = lockd_inetaddr_event, | |
309 | }; | |
310 | ||
311 | #if IS_ENABLED(CONFIG_IPV6) | |
312 | static int lockd_inet6addr_event(struct notifier_block *this, | |
313 | unsigned long event, void *ptr) | |
314 | { | |
315 | struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr; | |
316 | struct sockaddr_in6 sin6; | |
317 | ||
318 | if (event != NETDEV_DOWN) | |
319 | goto out; | |
320 | ||
321 | if (nlmsvc_rqst) { | |
322 | dprintk("lockd_inet6addr_event: removed %pI6\n", &ifa->addr); | |
323 | sin6.sin6_family = AF_INET6; | |
324 | sin6.sin6_addr = ifa->addr; | |
c01410f7 SM |
325 | if (ipv6_addr_type(&sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL) |
326 | sin6.sin6_scope_id = ifa->idev->dev->ifindex; | |
0751ddf7 SM |
327 | svc_age_temp_xprts_now(nlmsvc_rqst->rq_server, |
328 | (struct sockaddr *)&sin6); | |
329 | } | |
330 | ||
331 | out: | |
332 | return NOTIFY_DONE; | |
333 | } | |
334 | ||
335 | static struct notifier_block lockd_inet6addr_notifier = { | |
336 | .notifier_call = lockd_inet6addr_event, | |
337 | }; | |
338 | #endif | |
339 | ||
cb7d224f | 340 | static void lockd_unregister_notifiers(void) |
0751ddf7 SM |
341 | { |
342 | unregister_inetaddr_notifier(&lockd_inetaddr_notifier); | |
343 | #if IS_ENABLED(CONFIG_IPV6) | |
344 | unregister_inet6addr_notifier(&lockd_inet6addr_notifier); | |
345 | #endif | |
cb7d224f SM |
346 | } |
347 | ||
348 | static void lockd_svc_exit_thread(void) | |
349 | { | |
350 | lockd_unregister_notifiers(); | |
0751ddf7 SM |
351 | svc_exit_thread(nlmsvc_rqst); |
352 | } | |
353 | ||
3d1221df SK |
354 | static int lockd_start_svc(struct svc_serv *serv) |
355 | { | |
356 | int error; | |
357 | ||
358 | if (nlmsvc_rqst) | |
359 | return 0; | |
360 | ||
361 | /* | |
362 | * Create the kernel thread and wait for it to start. | |
363 | */ | |
364 | nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE); | |
365 | if (IS_ERR(nlmsvc_rqst)) { | |
366 | error = PTR_ERR(nlmsvc_rqst); | |
367 | printk(KERN_WARNING | |
368 | "lockd_up: svc_rqst allocation failed, error=%d\n", | |
369 | error); | |
370 | goto out_rqst; | |
371 | } | |
372 | ||
373 | svc_sock_update_bufs(serv); | |
374 | serv->sv_maxconn = nlm_max_connections; | |
375 | ||
d4e89902 | 376 | nlmsvc_task = kthread_create(lockd, nlmsvc_rqst, "%s", serv->sv_name); |
3d1221df SK |
377 | if (IS_ERR(nlmsvc_task)) { |
378 | error = PTR_ERR(nlmsvc_task); | |
379 | printk(KERN_WARNING | |
380 | "lockd_up: kthread_run failed, error=%d\n", error); | |
381 | goto out_task; | |
382 | } | |
d6a7ce42 | 383 | nlmsvc_rqst->rq_task = nlmsvc_task; |
d4e89902 | 384 | wake_up_process(nlmsvc_task); |
d6a7ce42 | 385 | |
3d1221df SK |
386 | dprintk("lockd_up: service started\n"); |
387 | return 0; | |
388 | ||
389 | out_task: | |
0751ddf7 | 390 | lockd_svc_exit_thread(); |
3d1221df SK |
391 | nlmsvc_task = NULL; |
392 | out_rqst: | |
393 | nlmsvc_rqst = NULL; | |
394 | return error; | |
395 | } | |
396 | ||
ea126e74 | 397 | static struct svc_serv_ops lockd_sv_ops = { |
b9e13cdf JL |
398 | .svo_shutdown = svc_rpcb_cleanup, |
399 | .svo_enqueue_xprt = svc_xprt_do_enqueue, | |
ea126e74 JL |
400 | }; |
401 | ||
24452239 | 402 | static struct svc_serv *lockd_create_svc(void) |
1da177e4 | 403 | { |
d751a7cd | 404 | struct svc_serv *serv; |
1da177e4 | 405 | |
1da177e4 LT |
406 | /* |
407 | * Check whether we're already up and running. | |
408 | */ | |
bb2224df | 409 | if (nlmsvc_rqst) { |
24452239 SK |
410 | /* |
411 | * Note: increase service usage, because later in case of error | |
412 | * svc_destroy() will be called. | |
413 | */ | |
414 | svc_get(nlmsvc_rqst->rq_server); | |
415 | return nlmsvc_rqst->rq_server; | |
bb2224df | 416 | } |
1da177e4 LT |
417 | |
418 | /* | |
419 | * Sanity check: if there's no pid, | |
420 | * we should be the first user ... | |
421 | */ | |
4a3ae42d | 422 | if (nlmsvc_users) |
1da177e4 LT |
423 | printk(KERN_WARNING |
424 | "lockd_up: no pid, %d users??\n", nlmsvc_users); | |
425 | ||
06bed7d1 TM |
426 | if (!nlm_timeout) |
427 | nlm_timeout = LOCKD_DFLT_TIMEO; | |
428 | nlmsvc_timeout = nlm_timeout * HZ; | |
429 | ||
ea126e74 | 430 | serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, &lockd_sv_ops); |
1da177e4 LT |
431 | if (!serv) { |
432 | printk(KERN_WARNING "lockd_up: create service failed\n"); | |
24452239 SK |
433 | return ERR_PTR(-ENOMEM); |
434 | } | |
0751ddf7 SM |
435 | register_inetaddr_notifier(&lockd_inetaddr_notifier); |
436 | #if IS_ENABLED(CONFIG_IPV6) | |
437 | register_inet6addr_notifier(&lockd_inet6addr_notifier); | |
438 | #endif | |
8dbf28e4 | 439 | dprintk("lockd_up: service created\n"); |
24452239 SK |
440 | return serv; |
441 | } | |
442 | ||
443 | /* | |
444 | * Bring up the lockd process if it's not already up. | |
445 | */ | |
446 | int lockd_up(struct net *net) | |
447 | { | |
448 | struct svc_serv *serv; | |
7d13ec76 | 449 | int error; |
24452239 SK |
450 | |
451 | mutex_lock(&nlmsvc_mutex); | |
452 | ||
453 | serv = lockd_create_svc(); | |
454 | if (IS_ERR(serv)) { | |
455 | error = PTR_ERR(serv); | |
456 | goto err_create; | |
1da177e4 LT |
457 | } |
458 | ||
dbf9b5d7 | 459 | error = lockd_up_net(serv, net); |
8c3916f4 | 460 | if (error < 0) |
dbf9b5d7 | 461 | goto err_net; |
1da177e4 | 462 | |
3d1221df SK |
463 | error = lockd_start_svc(serv); |
464 | if (error < 0) | |
786185b5 | 465 | goto err_start; |
1da177e4 | 466 | |
7d13ec76 | 467 | nlmsvc_users++; |
1da177e4 LT |
468 | /* |
469 | * Note: svc_serv structures have an initial use count of 1, | |
470 | * so we exit through here on both success and failure. | |
471 | */ | |
cb7d224f | 472 | err_put: |
1da177e4 | 473 | svc_destroy(serv); |
24452239 | 474 | err_create: |
353ab6e9 | 475 | mutex_unlock(&nlmsvc_mutex); |
1da177e4 | 476 | return error; |
786185b5 SK |
477 | |
478 | err_start: | |
4db77695 | 479 | lockd_down_net(serv, net); |
cb7d224f SM |
480 | err_net: |
481 | lockd_unregister_notifiers(); | |
482 | goto err_put; | |
1da177e4 | 483 | } |
2de59872 | 484 | EXPORT_SYMBOL_GPL(lockd_up); |
1da177e4 LT |
485 | |
486 | /* | |
487 | * Decrement the user count and bring down lockd if we're the last. | |
488 | */ | |
489 | void | |
e3f70ead | 490 | lockd_down(struct net *net) |
1da177e4 | 491 | { |
353ab6e9 | 492 | mutex_lock(&nlmsvc_mutex); |
4db77695 | 493 | lockd_down_net(nlmsvc_rqst->rq_server, net); |
1da177e4 | 494 | if (nlmsvc_users) { |
786185b5 | 495 | if (--nlmsvc_users) |
1da177e4 | 496 | goto out; |
d751a7cd JL |
497 | } else { |
498 | printk(KERN_ERR "lockd_down: no users! task=%p\n", | |
499 | nlmsvc_task); | |
500 | BUG(); | |
1da177e4 | 501 | } |
1da177e4 | 502 | |
d751a7cd JL |
503 | if (!nlmsvc_task) { |
504 | printk(KERN_ERR "lockd_down: no lockd running.\n"); | |
505 | BUG(); | |
1da177e4 | 506 | } |
d751a7cd | 507 | kthread_stop(nlmsvc_task); |
8dbf28e4 | 508 | dprintk("lockd_down: service stopped\n"); |
0751ddf7 | 509 | lockd_svc_exit_thread(); |
8dbf28e4 | 510 | dprintk("lockd_down: service destroyed\n"); |
abd1ec4e JL |
511 | nlmsvc_task = NULL; |
512 | nlmsvc_rqst = NULL; | |
1da177e4 | 513 | out: |
353ab6e9 | 514 | mutex_unlock(&nlmsvc_mutex); |
1da177e4 | 515 | } |
2de59872 | 516 | EXPORT_SYMBOL_GPL(lockd_down); |
1da177e4 | 517 | |
90d5b180 CL |
518 | #ifdef CONFIG_SYSCTL |
519 | ||
1da177e4 LT |
520 | /* |
521 | * Sysctl parameters (same as module parameters, different interface). | |
522 | */ | |
523 | ||
7ac9fe57 | 524 | static struct ctl_table nlm_sysctls[] = { |
1da177e4 | 525 | { |
1da177e4 LT |
526 | .procname = "nlm_grace_period", |
527 | .data = &nlm_grace_period, | |
7ee91ec1 | 528 | .maxlen = sizeof(unsigned long), |
1da177e4 | 529 | .mode = 0644, |
6d456111 | 530 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
531 | .extra1 = (unsigned long *) &nlm_grace_period_min, |
532 | .extra2 = (unsigned long *) &nlm_grace_period_max, | |
533 | }, | |
534 | { | |
1da177e4 LT |
535 | .procname = "nlm_timeout", |
536 | .data = &nlm_timeout, | |
7ee91ec1 | 537 | .maxlen = sizeof(unsigned long), |
1da177e4 | 538 | .mode = 0644, |
6d456111 | 539 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
540 | .extra1 = (unsigned long *) &nlm_timeout_min, |
541 | .extra2 = (unsigned long *) &nlm_timeout_max, | |
542 | }, | |
543 | { | |
1da177e4 LT |
544 | .procname = "nlm_udpport", |
545 | .data = &nlm_udpport, | |
546 | .maxlen = sizeof(int), | |
547 | .mode = 0644, | |
6d456111 | 548 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
549 | .extra1 = (int *) &nlm_port_min, |
550 | .extra2 = (int *) &nlm_port_max, | |
551 | }, | |
552 | { | |
1da177e4 LT |
553 | .procname = "nlm_tcpport", |
554 | .data = &nlm_tcpport, | |
555 | .maxlen = sizeof(int), | |
556 | .mode = 0644, | |
6d456111 | 557 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
558 | .extra1 = (int *) &nlm_port_min, |
559 | .extra2 = (int *) &nlm_port_max, | |
560 | }, | |
abd1f500 | 561 | { |
abd1f500 OK |
562 | .procname = "nsm_use_hostnames", |
563 | .data = &nsm_use_hostnames, | |
564 | .maxlen = sizeof(int), | |
565 | .mode = 0644, | |
6d456111 | 566 | .proc_handler = proc_dointvec, |
abd1f500 | 567 | }, |
460f5cac | 568 | { |
460f5cac OK |
569 | .procname = "nsm_local_state", |
570 | .data = &nsm_local_state, | |
571 | .maxlen = sizeof(int), | |
572 | .mode = 0644, | |
6d456111 | 573 | .proc_handler = proc_dointvec, |
460f5cac | 574 | }, |
ab09203e | 575 | { } |
1da177e4 LT |
576 | }; |
577 | ||
7ac9fe57 | 578 | static struct ctl_table nlm_sysctl_dir[] = { |
1da177e4 | 579 | { |
1da177e4 LT |
580 | .procname = "nfs", |
581 | .mode = 0555, | |
582 | .child = nlm_sysctls, | |
583 | }, | |
ab09203e | 584 | { } |
1da177e4 LT |
585 | }; |
586 | ||
7ac9fe57 | 587 | static struct ctl_table nlm_sysctl_root[] = { |
1da177e4 | 588 | { |
1da177e4 LT |
589 | .procname = "fs", |
590 | .mode = 0555, | |
591 | .child = nlm_sysctl_dir, | |
592 | }, | |
ab09203e | 593 | { } |
1da177e4 LT |
594 | }; |
595 | ||
90d5b180 CL |
596 | #endif /* CONFIG_SYSCTL */ |
597 | ||
1da177e4 | 598 | /* |
405ae7d3 | 599 | * Module (and sysfs) parameters. |
1da177e4 LT |
600 | */ |
601 | ||
602 | #define param_set_min_max(name, type, which_strtol, min, max) \ | |
603 | static int param_set_##name(const char *val, struct kernel_param *kp) \ | |
604 | { \ | |
605 | char *endp; \ | |
606 | __typeof__(type) num = which_strtol(val, &endp, 0); \ | |
607 | if (endp == val || *endp || num < (min) || num > (max)) \ | |
608 | return -EINVAL; \ | |
de5b8e8e | 609 | *((type *) kp->arg) = num; \ |
1da177e4 LT |
610 | return 0; \ |
611 | } | |
612 | ||
613 | static inline int is_callback(u32 proc) | |
614 | { | |
615 | return proc == NLMPROC_GRANTED | |
616 | || proc == NLMPROC_GRANTED_MSG | |
617 | || proc == NLMPROC_TEST_RES | |
618 | || proc == NLMPROC_LOCK_RES | |
619 | || proc == NLMPROC_CANCEL_RES | |
620 | || proc == NLMPROC_UNLOCK_RES | |
621 | || proc == NLMPROC_NSM_NOTIFY; | |
622 | } | |
623 | ||
624 | ||
625 | static int lockd_authenticate(struct svc_rqst *rqstp) | |
626 | { | |
627 | rqstp->rq_client = NULL; | |
628 | switch (rqstp->rq_authop->flavour) { | |
629 | case RPC_AUTH_NULL: | |
630 | case RPC_AUTH_UNIX: | |
631 | if (rqstp->rq_proc == 0) | |
632 | return SVC_OK; | |
633 | if (is_callback(rqstp->rq_proc)) { | |
634 | /* Leave it to individual procedures to | |
635 | * call nlmsvc_lookup_host(rqstp) | |
636 | */ | |
637 | return SVC_OK; | |
638 | } | |
639 | return svc_set_client(rqstp); | |
640 | } | |
641 | return SVC_DENIED; | |
642 | } | |
643 | ||
644 | ||
645 | param_set_min_max(port, int, simple_strtol, 0, 65535) | |
646 | param_set_min_max(grace_period, unsigned long, simple_strtoul, | |
647 | nlm_grace_period_min, nlm_grace_period_max) | |
648 | param_set_min_max(timeout, unsigned long, simple_strtoul, | |
649 | nlm_timeout_min, nlm_timeout_max) | |
650 | ||
651 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
652 | MODULE_DESCRIPTION("NFS file locking service version " LOCKD_VERSION "."); | |
653 | MODULE_LICENSE("GPL"); | |
654 | ||
655 | module_param_call(nlm_grace_period, param_set_grace_period, param_get_ulong, | |
656 | &nlm_grace_period, 0644); | |
657 | module_param_call(nlm_timeout, param_set_timeout, param_get_ulong, | |
658 | &nlm_timeout, 0644); | |
659 | module_param_call(nlm_udpport, param_set_port, param_get_int, | |
660 | &nlm_udpport, 0644); | |
661 | module_param_call(nlm_tcpport, param_set_port, param_get_int, | |
662 | &nlm_tcpport, 0644); | |
abd1f500 | 663 | module_param(nsm_use_hostnames, bool, 0644); |
c72a476b | 664 | module_param(nlm_max_connections, uint, 0644); |
1da177e4 | 665 | |
a9c5d73a SK |
666 | static int lockd_init_net(struct net *net) |
667 | { | |
66547b02 SK |
668 | struct lockd_net *ln = net_generic(net, lockd_net_id); |
669 | ||
670 | INIT_DELAYED_WORK(&ln->grace_period_end, grace_ender); | |
f7790029 | 671 | INIT_LIST_HEAD(&ln->lockd_manager.list); |
c87fb4a3 | 672 | ln->lockd_manager.block_opens = false; |
0ad95472 | 673 | INIT_LIST_HEAD(&ln->nsm_handles); |
a9c5d73a SK |
674 | return 0; |
675 | } | |
676 | ||
677 | static void lockd_exit_net(struct net *net) | |
678 | { | |
679 | } | |
680 | ||
681 | static struct pernet_operations lockd_net_ops = { | |
682 | .init = lockd_init_net, | |
683 | .exit = lockd_exit_net, | |
684 | .id = &lockd_net_id, | |
685 | .size = sizeof(struct lockd_net), | |
686 | }; | |
687 | ||
688 | ||
1da177e4 LT |
689 | /* |
690 | * Initialising and terminating the module. | |
691 | */ | |
692 | ||
693 | static int __init init_nlm(void) | |
694 | { | |
a9c5d73a SK |
695 | int err; |
696 | ||
90d5b180 | 697 | #ifdef CONFIG_SYSCTL |
a9c5d73a | 698 | err = -ENOMEM; |
0b4d4147 | 699 | nlm_sysctl_table = register_sysctl_table(nlm_sysctl_root); |
a9c5d73a SK |
700 | if (nlm_sysctl_table == NULL) |
701 | goto err_sysctl; | |
702 | #endif | |
703 | err = register_pernet_subsys(&lockd_net_ops); | |
704 | if (err) | |
705 | goto err_pernet; | |
d68e3c4a JL |
706 | |
707 | err = lockd_create_procfs(); | |
708 | if (err) | |
709 | goto err_procfs; | |
710 | ||
90d5b180 | 711 | return 0; |
a9c5d73a | 712 | |
d68e3c4a JL |
713 | err_procfs: |
714 | unregister_pernet_subsys(&lockd_net_ops); | |
a9c5d73a SK |
715 | err_pernet: |
716 | #ifdef CONFIG_SYSCTL | |
717 | unregister_sysctl_table(nlm_sysctl_table); | |
a9c5d73a | 718 | err_sysctl: |
12dd7ecf | 719 | #endif |
a9c5d73a | 720 | return err; |
1da177e4 LT |
721 | } |
722 | ||
723 | static void __exit exit_nlm(void) | |
724 | { | |
725 | /* FIXME: delete all NLM clients */ | |
726 | nlm_shutdown_hosts(); | |
d68e3c4a | 727 | lockd_remove_procfs(); |
a9c5d73a | 728 | unregister_pernet_subsys(&lockd_net_ops); |
90d5b180 | 729 | #ifdef CONFIG_SYSCTL |
1da177e4 | 730 | unregister_sysctl_table(nlm_sysctl_table); |
90d5b180 | 731 | #endif |
1da177e4 LT |
732 | } |
733 | ||
734 | module_init(init_nlm); | |
735 | module_exit(exit_nlm); | |
736 | ||
737 | /* | |
738 | * Define NLM program and procedures | |
739 | */ | |
740 | static struct svc_version nlmsvc_version1 = { | |
741 | .vs_vers = 1, | |
742 | .vs_nproc = 17, | |
743 | .vs_proc = nlmsvc_procedures, | |
744 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
745 | }; | |
746 | static struct svc_version nlmsvc_version3 = { | |
747 | .vs_vers = 3, | |
748 | .vs_nproc = 24, | |
749 | .vs_proc = nlmsvc_procedures, | |
750 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
751 | }; | |
752 | #ifdef CONFIG_LOCKD_V4 | |
753 | static struct svc_version nlmsvc_version4 = { | |
754 | .vs_vers = 4, | |
755 | .vs_nproc = 24, | |
756 | .vs_proc = nlmsvc_procedures4, | |
757 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
758 | }; | |
759 | #endif | |
760 | static struct svc_version * nlmsvc_version[] = { | |
761 | [1] = &nlmsvc_version1, | |
762 | [3] = &nlmsvc_version3, | |
763 | #ifdef CONFIG_LOCKD_V4 | |
764 | [4] = &nlmsvc_version4, | |
765 | #endif | |
766 | }; | |
767 | ||
768 | static struct svc_stat nlmsvc_stats; | |
769 | ||
e8c96f8c | 770 | #define NLM_NRVERS ARRAY_SIZE(nlmsvc_version) |
1da177e4 LT |
771 | static struct svc_program nlmsvc_program = { |
772 | .pg_prog = NLM_PROGRAM, /* program number */ | |
773 | .pg_nvers = NLM_NRVERS, /* number of entries in nlmsvc_version */ | |
774 | .pg_vers = nlmsvc_version, /* version table */ | |
775 | .pg_name = "lockd", /* service name */ | |
776 | .pg_class = "nfsd", /* share authentication with nfsd */ | |
777 | .pg_stats = &nlmsvc_stats, /* stats table */ | |
778 | .pg_authenticate = &lockd_authenticate /* export authentication */ | |
779 | }; |