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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; |
efda760f BF |
135 | struct net *net = &init_net; |
136 | struct lockd_net *ln = net_generic(net, lockd_net_id); | |
1da177e4 | 137 | |
d751a7cd | 138 | /* try_to_freeze() is called from svc_recv() */ |
83144186 | 139 | set_freezable(); |
1da177e4 | 140 | |
d751a7cd | 141 | /* Allow SIGKILL to tell lockd to drop all of its locks */ |
1da177e4 LT |
142 | allow_signal(SIGKILL); |
143 | ||
1da177e4 LT |
144 | dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n"); |
145 | ||
1da177e4 LT |
146 | /* |
147 | * The main request loop. We don't terminate until the last | |
d751a7cd | 148 | * NFS mount or NFS daemon has gone away. |
1da177e4 | 149 | */ |
d751a7cd | 150 | while (!kthread_should_stop()) { |
1da177e4 | 151 | long timeout = MAX_SCHEDULE_TIMEOUT; |
5216a8e7 | 152 | RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); |
1da177e4 | 153 | |
c72a476b JL |
154 | /* update sv_maxconn if it has changed */ |
155 | rqstp->rq_server->sv_maxconn = nlm_max_connections; | |
156 | ||
1da177e4 LT |
157 | if (signalled()) { |
158 | flush_signals(current); | |
89996df4 | 159 | restart_grace(); |
d751a7cd | 160 | continue; |
1da177e4 LT |
161 | } |
162 | ||
8fafa900 BF |
163 | timeout = nlmsvc_retry_blocked(); |
164 | ||
1da177e4 LT |
165 | /* |
166 | * Find a socket with data available and call its | |
167 | * recvfrom routine. | |
168 | */ | |
6fb2b47f | 169 | err = svc_recv(rqstp, timeout); |
5b444cc9 | 170 | if (err == -EAGAIN || err == -EINTR) |
1da177e4 | 171 | continue; |
ad06e4bd CL |
172 | dprintk("lockd: request from %s\n", |
173 | svc_print_addr(rqstp, buf, sizeof(buf))); | |
1da177e4 | 174 | |
6fb2b47f | 175 | svc_process(rqstp); |
1da177e4 | 176 | } |
2bd61579 | 177 | flush_signals(current); |
d751a7cd JL |
178 | if (nlmsvc_ops) |
179 | nlmsvc_invalidate_all(); | |
180 | nlm_shutdown_hosts(); | |
efda760f BF |
181 | cancel_delayed_work_sync(&ln->grace_period_end); |
182 | locks_end_grace(&ln->lockd_manager); | |
d751a7cd | 183 | return 0; |
1da177e4 LT |
184 | } |
185 | ||
eb16e907 | 186 | static int create_lockd_listener(struct svc_serv *serv, const char *name, |
c228fa20 SK |
187 | struct net *net, const int family, |
188 | const unsigned short port) | |
d3fe5ea7 CL |
189 | { |
190 | struct svc_xprt *xprt; | |
191 | ||
c228fa20 | 192 | xprt = svc_find_xprt(serv, name, net, family, 0); |
d3fe5ea7 | 193 | if (xprt == NULL) |
c228fa20 | 194 | return svc_create_xprt(serv, name, net, family, port, |
eb16e907 | 195 | SVC_SOCK_DEFAULTS); |
d3fe5ea7 CL |
196 | svc_xprt_put(xprt); |
197 | return 0; | |
198 | } | |
199 | ||
c228fa20 SK |
200 | static int create_lockd_family(struct svc_serv *serv, struct net *net, |
201 | const int family) | |
eb16e907 CL |
202 | { |
203 | int err; | |
204 | ||
c228fa20 | 205 | err = create_lockd_listener(serv, "udp", net, family, nlm_udpport); |
eb16e907 CL |
206 | if (err < 0) |
207 | return err; | |
208 | ||
c228fa20 | 209 | return create_lockd_listener(serv, "tcp", net, family, nlm_tcpport); |
eb16e907 CL |
210 | } |
211 | ||
482fb94e | 212 | /* |
8c3916f4 CL |
213 | * Ensure there are active UDP and TCP listeners for lockd. |
214 | * | |
215 | * Even if we have only TCP NFS mounts and/or TCP NFSDs, some | |
216 | * local services (such as rpc.statd) still require UDP, and | |
217 | * some NFS servers do not yet support NLM over TCP. | |
218 | * | |
219 | * Returns zero if all listeners are available; otherwise a | |
220 | * negative errno value is returned. | |
482fb94e | 221 | */ |
c228fa20 | 222 | static int make_socks(struct svc_serv *serv, struct net *net) |
24e36663 | 223 | { |
482fb94e | 224 | static int warned; |
0dba7c2a | 225 | int err; |
482fb94e | 226 | |
c228fa20 | 227 | err = create_lockd_family(serv, net, PF_INET); |
0dba7c2a CL |
228 | if (err < 0) |
229 | goto out_err; | |
230 | ||
c228fa20 | 231 | err = create_lockd_family(serv, net, PF_INET6); |
eb16e907 | 232 | if (err < 0 && err != -EAFNOSUPPORT) |
0dba7c2a CL |
233 | goto out_err; |
234 | ||
235 | warned = 0; | |
236 | return 0; | |
237 | ||
238 | out_err: | |
239 | if (warned++ == 0) | |
7dcf91ec | 240 | printk(KERN_WARNING |
0dba7c2a | 241 | "lockd_up: makesock failed, error=%d\n", err); |
679b033d | 242 | svc_shutdown_net(serv, net); |
24e36663 N |
243 | return err; |
244 | } | |
245 | ||
4db77695 | 246 | static int lockd_up_net(struct svc_serv *serv, struct net *net) |
bb2224df SK |
247 | { |
248 | struct lockd_net *ln = net_generic(net, lockd_net_id); | |
bb2224df SK |
249 | int error; |
250 | ||
786185b5 | 251 | if (ln->nlmsvc_users++) |
bb2224df SK |
252 | return 0; |
253 | ||
dbf9b5d7 | 254 | error = svc_bind(serv, net); |
bb2224df | 255 | if (error) |
dbf9b5d7 | 256 | goto err_bind; |
bb2224df SK |
257 | |
258 | error = make_socks(serv, net); | |
259 | if (error < 0) | |
7c17705e | 260 | goto err_bind; |
5630f7fa | 261 | set_grace_period(net); |
8dbf28e4 | 262 | dprintk("lockd_up_net: per-net data created; net=%p\n", net); |
bb2224df SK |
263 | return 0; |
264 | ||
dbf9b5d7 | 265 | err_bind: |
786185b5 | 266 | ln->nlmsvc_users--; |
bb2224df SK |
267 | return error; |
268 | } | |
269 | ||
4db77695 | 270 | static void lockd_down_net(struct svc_serv *serv, struct net *net) |
bb2224df SK |
271 | { |
272 | struct lockd_net *ln = net_generic(net, lockd_net_id); | |
bb2224df SK |
273 | |
274 | if (ln->nlmsvc_users) { | |
3b64739f SK |
275 | if (--ln->nlmsvc_users == 0) { |
276 | nlm_shutdown_hosts_net(net); | |
bb2224df | 277 | svc_shutdown_net(serv, net); |
8dbf28e4 | 278 | dprintk("lockd_down_net: per-net data destroyed; net=%p\n", net); |
3b64739f | 279 | } |
bb2224df SK |
280 | } else { |
281 | printk(KERN_ERR "lockd_down_net: no users! task=%p, net=%p\n", | |
282 | nlmsvc_task, net); | |
283 | BUG(); | |
284 | } | |
285 | } | |
286 | ||
0751ddf7 SM |
287 | static int lockd_inetaddr_event(struct notifier_block *this, |
288 | unsigned long event, void *ptr) | |
289 | { | |
290 | struct in_ifaddr *ifa = (struct in_ifaddr *)ptr; | |
291 | struct sockaddr_in sin; | |
292 | ||
293 | if (event != NETDEV_DOWN) | |
294 | goto out; | |
295 | ||
296 | if (nlmsvc_rqst) { | |
297 | dprintk("lockd_inetaddr_event: removed %pI4\n", | |
298 | &ifa->ifa_local); | |
299 | sin.sin_family = AF_INET; | |
300 | sin.sin_addr.s_addr = ifa->ifa_local; | |
301 | svc_age_temp_xprts_now(nlmsvc_rqst->rq_server, | |
302 | (struct sockaddr *)&sin); | |
303 | } | |
304 | ||
305 | out: | |
306 | return NOTIFY_DONE; | |
307 | } | |
308 | ||
309 | static struct notifier_block lockd_inetaddr_notifier = { | |
310 | .notifier_call = lockd_inetaddr_event, | |
311 | }; | |
312 | ||
313 | #if IS_ENABLED(CONFIG_IPV6) | |
314 | static int lockd_inet6addr_event(struct notifier_block *this, | |
315 | unsigned long event, void *ptr) | |
316 | { | |
317 | struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr; | |
318 | struct sockaddr_in6 sin6; | |
319 | ||
320 | if (event != NETDEV_DOWN) | |
321 | goto out; | |
322 | ||
323 | if (nlmsvc_rqst) { | |
324 | dprintk("lockd_inet6addr_event: removed %pI6\n", &ifa->addr); | |
325 | sin6.sin6_family = AF_INET6; | |
326 | sin6.sin6_addr = ifa->addr; | |
c01410f7 SM |
327 | if (ipv6_addr_type(&sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL) |
328 | sin6.sin6_scope_id = ifa->idev->dev->ifindex; | |
0751ddf7 SM |
329 | svc_age_temp_xprts_now(nlmsvc_rqst->rq_server, |
330 | (struct sockaddr *)&sin6); | |
331 | } | |
332 | ||
333 | out: | |
334 | return NOTIFY_DONE; | |
335 | } | |
336 | ||
337 | static struct notifier_block lockd_inet6addr_notifier = { | |
338 | .notifier_call = lockd_inet6addr_event, | |
339 | }; | |
340 | #endif | |
341 | ||
cb7d224f | 342 | static void lockd_unregister_notifiers(void) |
0751ddf7 SM |
343 | { |
344 | unregister_inetaddr_notifier(&lockd_inetaddr_notifier); | |
345 | #if IS_ENABLED(CONFIG_IPV6) | |
346 | unregister_inet6addr_notifier(&lockd_inet6addr_notifier); | |
347 | #endif | |
cb7d224f SM |
348 | } |
349 | ||
350 | static void lockd_svc_exit_thread(void) | |
351 | { | |
352 | lockd_unregister_notifiers(); | |
0751ddf7 SM |
353 | svc_exit_thread(nlmsvc_rqst); |
354 | } | |
355 | ||
3d1221df SK |
356 | static int lockd_start_svc(struct svc_serv *serv) |
357 | { | |
358 | int error; | |
359 | ||
360 | if (nlmsvc_rqst) | |
361 | return 0; | |
362 | ||
363 | /* | |
364 | * Create the kernel thread and wait for it to start. | |
365 | */ | |
366 | nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE); | |
367 | if (IS_ERR(nlmsvc_rqst)) { | |
368 | error = PTR_ERR(nlmsvc_rqst); | |
369 | printk(KERN_WARNING | |
370 | "lockd_up: svc_rqst allocation failed, error=%d\n", | |
371 | error); | |
372 | goto out_rqst; | |
373 | } | |
374 | ||
375 | svc_sock_update_bufs(serv); | |
376 | serv->sv_maxconn = nlm_max_connections; | |
377 | ||
d4e89902 | 378 | nlmsvc_task = kthread_create(lockd, nlmsvc_rqst, "%s", serv->sv_name); |
3d1221df SK |
379 | if (IS_ERR(nlmsvc_task)) { |
380 | error = PTR_ERR(nlmsvc_task); | |
381 | printk(KERN_WARNING | |
382 | "lockd_up: kthread_run failed, error=%d\n", error); | |
383 | goto out_task; | |
384 | } | |
d6a7ce42 | 385 | nlmsvc_rqst->rq_task = nlmsvc_task; |
d4e89902 | 386 | wake_up_process(nlmsvc_task); |
d6a7ce42 | 387 | |
3d1221df SK |
388 | dprintk("lockd_up: service started\n"); |
389 | return 0; | |
390 | ||
391 | out_task: | |
0751ddf7 | 392 | lockd_svc_exit_thread(); |
3d1221df SK |
393 | nlmsvc_task = NULL; |
394 | out_rqst: | |
395 | nlmsvc_rqst = NULL; | |
396 | return error; | |
397 | } | |
398 | ||
ea126e74 | 399 | static struct svc_serv_ops lockd_sv_ops = { |
b9e13cdf JL |
400 | .svo_shutdown = svc_rpcb_cleanup, |
401 | .svo_enqueue_xprt = svc_xprt_do_enqueue, | |
ea126e74 JL |
402 | }; |
403 | ||
24452239 | 404 | static struct svc_serv *lockd_create_svc(void) |
1da177e4 | 405 | { |
d751a7cd | 406 | struct svc_serv *serv; |
1da177e4 | 407 | |
1da177e4 LT |
408 | /* |
409 | * Check whether we're already up and running. | |
410 | */ | |
bb2224df | 411 | if (nlmsvc_rqst) { |
24452239 SK |
412 | /* |
413 | * Note: increase service usage, because later in case of error | |
414 | * svc_destroy() will be called. | |
415 | */ | |
416 | svc_get(nlmsvc_rqst->rq_server); | |
417 | return nlmsvc_rqst->rq_server; | |
bb2224df | 418 | } |
1da177e4 LT |
419 | |
420 | /* | |
421 | * Sanity check: if there's no pid, | |
422 | * we should be the first user ... | |
423 | */ | |
4a3ae42d | 424 | if (nlmsvc_users) |
1da177e4 LT |
425 | printk(KERN_WARNING |
426 | "lockd_up: no pid, %d users??\n", nlmsvc_users); | |
427 | ||
06bed7d1 TM |
428 | if (!nlm_timeout) |
429 | nlm_timeout = LOCKD_DFLT_TIMEO; | |
430 | nlmsvc_timeout = nlm_timeout * HZ; | |
431 | ||
ea126e74 | 432 | serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, &lockd_sv_ops); |
1da177e4 LT |
433 | if (!serv) { |
434 | printk(KERN_WARNING "lockd_up: create service failed\n"); | |
24452239 SK |
435 | return ERR_PTR(-ENOMEM); |
436 | } | |
0751ddf7 SM |
437 | register_inetaddr_notifier(&lockd_inetaddr_notifier); |
438 | #if IS_ENABLED(CONFIG_IPV6) | |
439 | register_inet6addr_notifier(&lockd_inet6addr_notifier); | |
440 | #endif | |
8dbf28e4 | 441 | dprintk("lockd_up: service created\n"); |
24452239 SK |
442 | return serv; |
443 | } | |
444 | ||
445 | /* | |
446 | * Bring up the lockd process if it's not already up. | |
447 | */ | |
448 | int lockd_up(struct net *net) | |
449 | { | |
450 | struct svc_serv *serv; | |
7d13ec76 | 451 | int error; |
24452239 SK |
452 | |
453 | mutex_lock(&nlmsvc_mutex); | |
454 | ||
455 | serv = lockd_create_svc(); | |
456 | if (IS_ERR(serv)) { | |
457 | error = PTR_ERR(serv); | |
458 | goto err_create; | |
1da177e4 LT |
459 | } |
460 | ||
dbf9b5d7 | 461 | error = lockd_up_net(serv, net); |
8c3916f4 | 462 | if (error < 0) |
dbf9b5d7 | 463 | goto err_net; |
1da177e4 | 464 | |
3d1221df SK |
465 | error = lockd_start_svc(serv); |
466 | if (error < 0) | |
786185b5 | 467 | goto err_start; |
1da177e4 | 468 | |
7d13ec76 | 469 | nlmsvc_users++; |
1da177e4 LT |
470 | /* |
471 | * Note: svc_serv structures have an initial use count of 1, | |
472 | * so we exit through here on both success and failure. | |
473 | */ | |
cb7d224f | 474 | err_put: |
1da177e4 | 475 | svc_destroy(serv); |
24452239 | 476 | err_create: |
353ab6e9 | 477 | mutex_unlock(&nlmsvc_mutex); |
1da177e4 | 478 | return error; |
786185b5 SK |
479 | |
480 | err_start: | |
4db77695 | 481 | lockd_down_net(serv, net); |
cb7d224f SM |
482 | err_net: |
483 | lockd_unregister_notifiers(); | |
484 | goto err_put; | |
1da177e4 | 485 | } |
2de59872 | 486 | EXPORT_SYMBOL_GPL(lockd_up); |
1da177e4 LT |
487 | |
488 | /* | |
489 | * Decrement the user count and bring down lockd if we're the last. | |
490 | */ | |
491 | void | |
e3f70ead | 492 | lockd_down(struct net *net) |
1da177e4 | 493 | { |
353ab6e9 | 494 | mutex_lock(&nlmsvc_mutex); |
4db77695 | 495 | lockd_down_net(nlmsvc_rqst->rq_server, net); |
1da177e4 | 496 | if (nlmsvc_users) { |
786185b5 | 497 | if (--nlmsvc_users) |
1da177e4 | 498 | goto out; |
d751a7cd JL |
499 | } else { |
500 | printk(KERN_ERR "lockd_down: no users! task=%p\n", | |
501 | nlmsvc_task); | |
502 | BUG(); | |
1da177e4 | 503 | } |
1da177e4 | 504 | |
d751a7cd JL |
505 | if (!nlmsvc_task) { |
506 | printk(KERN_ERR "lockd_down: no lockd running.\n"); | |
507 | BUG(); | |
1da177e4 | 508 | } |
d751a7cd | 509 | kthread_stop(nlmsvc_task); |
8dbf28e4 | 510 | dprintk("lockd_down: service stopped\n"); |
0751ddf7 | 511 | lockd_svc_exit_thread(); |
8dbf28e4 | 512 | dprintk("lockd_down: service destroyed\n"); |
abd1ec4e JL |
513 | nlmsvc_task = NULL; |
514 | nlmsvc_rqst = NULL; | |
1da177e4 | 515 | out: |
353ab6e9 | 516 | mutex_unlock(&nlmsvc_mutex); |
1da177e4 | 517 | } |
2de59872 | 518 | EXPORT_SYMBOL_GPL(lockd_down); |
1da177e4 | 519 | |
90d5b180 CL |
520 | #ifdef CONFIG_SYSCTL |
521 | ||
1da177e4 LT |
522 | /* |
523 | * Sysctl parameters (same as module parameters, different interface). | |
524 | */ | |
525 | ||
7ac9fe57 | 526 | static struct ctl_table nlm_sysctls[] = { |
1da177e4 | 527 | { |
1da177e4 LT |
528 | .procname = "nlm_grace_period", |
529 | .data = &nlm_grace_period, | |
7ee91ec1 | 530 | .maxlen = sizeof(unsigned long), |
1da177e4 | 531 | .mode = 0644, |
6d456111 | 532 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
533 | .extra1 = (unsigned long *) &nlm_grace_period_min, |
534 | .extra2 = (unsigned long *) &nlm_grace_period_max, | |
535 | }, | |
536 | { | |
1da177e4 LT |
537 | .procname = "nlm_timeout", |
538 | .data = &nlm_timeout, | |
7ee91ec1 | 539 | .maxlen = sizeof(unsigned long), |
1da177e4 | 540 | .mode = 0644, |
6d456111 | 541 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
542 | .extra1 = (unsigned long *) &nlm_timeout_min, |
543 | .extra2 = (unsigned long *) &nlm_timeout_max, | |
544 | }, | |
545 | { | |
1da177e4 LT |
546 | .procname = "nlm_udpport", |
547 | .data = &nlm_udpport, | |
548 | .maxlen = sizeof(int), | |
549 | .mode = 0644, | |
6d456111 | 550 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
551 | .extra1 = (int *) &nlm_port_min, |
552 | .extra2 = (int *) &nlm_port_max, | |
553 | }, | |
554 | { | |
1da177e4 LT |
555 | .procname = "nlm_tcpport", |
556 | .data = &nlm_tcpport, | |
557 | .maxlen = sizeof(int), | |
558 | .mode = 0644, | |
6d456111 | 559 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
560 | .extra1 = (int *) &nlm_port_min, |
561 | .extra2 = (int *) &nlm_port_max, | |
562 | }, | |
abd1f500 | 563 | { |
abd1f500 OK |
564 | .procname = "nsm_use_hostnames", |
565 | .data = &nsm_use_hostnames, | |
566 | .maxlen = sizeof(int), | |
567 | .mode = 0644, | |
6d456111 | 568 | .proc_handler = proc_dointvec, |
abd1f500 | 569 | }, |
460f5cac | 570 | { |
460f5cac OK |
571 | .procname = "nsm_local_state", |
572 | .data = &nsm_local_state, | |
573 | .maxlen = sizeof(int), | |
574 | .mode = 0644, | |
6d456111 | 575 | .proc_handler = proc_dointvec, |
460f5cac | 576 | }, |
ab09203e | 577 | { } |
1da177e4 LT |
578 | }; |
579 | ||
7ac9fe57 | 580 | static struct ctl_table nlm_sysctl_dir[] = { |
1da177e4 | 581 | { |
1da177e4 LT |
582 | .procname = "nfs", |
583 | .mode = 0555, | |
584 | .child = nlm_sysctls, | |
585 | }, | |
ab09203e | 586 | { } |
1da177e4 LT |
587 | }; |
588 | ||
7ac9fe57 | 589 | static struct ctl_table nlm_sysctl_root[] = { |
1da177e4 | 590 | { |
1da177e4 LT |
591 | .procname = "fs", |
592 | .mode = 0555, | |
593 | .child = nlm_sysctl_dir, | |
594 | }, | |
ab09203e | 595 | { } |
1da177e4 LT |
596 | }; |
597 | ||
90d5b180 CL |
598 | #endif /* CONFIG_SYSCTL */ |
599 | ||
1da177e4 | 600 | /* |
405ae7d3 | 601 | * Module (and sysfs) parameters. |
1da177e4 LT |
602 | */ |
603 | ||
604 | #define param_set_min_max(name, type, which_strtol, min, max) \ | |
605 | static int param_set_##name(const char *val, struct kernel_param *kp) \ | |
606 | { \ | |
607 | char *endp; \ | |
608 | __typeof__(type) num = which_strtol(val, &endp, 0); \ | |
609 | if (endp == val || *endp || num < (min) || num > (max)) \ | |
610 | return -EINVAL; \ | |
de5b8e8e | 611 | *((type *) kp->arg) = num; \ |
1da177e4 LT |
612 | return 0; \ |
613 | } | |
614 | ||
615 | static inline int is_callback(u32 proc) | |
616 | { | |
617 | return proc == NLMPROC_GRANTED | |
618 | || proc == NLMPROC_GRANTED_MSG | |
619 | || proc == NLMPROC_TEST_RES | |
620 | || proc == NLMPROC_LOCK_RES | |
621 | || proc == NLMPROC_CANCEL_RES | |
622 | || proc == NLMPROC_UNLOCK_RES | |
623 | || proc == NLMPROC_NSM_NOTIFY; | |
624 | } | |
625 | ||
626 | ||
627 | static int lockd_authenticate(struct svc_rqst *rqstp) | |
628 | { | |
629 | rqstp->rq_client = NULL; | |
630 | switch (rqstp->rq_authop->flavour) { | |
631 | case RPC_AUTH_NULL: | |
632 | case RPC_AUTH_UNIX: | |
633 | if (rqstp->rq_proc == 0) | |
634 | return SVC_OK; | |
635 | if (is_callback(rqstp->rq_proc)) { | |
636 | /* Leave it to individual procedures to | |
637 | * call nlmsvc_lookup_host(rqstp) | |
638 | */ | |
639 | return SVC_OK; | |
640 | } | |
641 | return svc_set_client(rqstp); | |
642 | } | |
643 | return SVC_DENIED; | |
644 | } | |
645 | ||
646 | ||
647 | param_set_min_max(port, int, simple_strtol, 0, 65535) | |
648 | param_set_min_max(grace_period, unsigned long, simple_strtoul, | |
649 | nlm_grace_period_min, nlm_grace_period_max) | |
650 | param_set_min_max(timeout, unsigned long, simple_strtoul, | |
651 | nlm_timeout_min, nlm_timeout_max) | |
652 | ||
653 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
654 | MODULE_DESCRIPTION("NFS file locking service version " LOCKD_VERSION "."); | |
655 | MODULE_LICENSE("GPL"); | |
656 | ||
657 | module_param_call(nlm_grace_period, param_set_grace_period, param_get_ulong, | |
658 | &nlm_grace_period, 0644); | |
659 | module_param_call(nlm_timeout, param_set_timeout, param_get_ulong, | |
660 | &nlm_timeout, 0644); | |
661 | module_param_call(nlm_udpport, param_set_port, param_get_int, | |
662 | &nlm_udpport, 0644); | |
663 | module_param_call(nlm_tcpport, param_set_port, param_get_int, | |
664 | &nlm_tcpport, 0644); | |
abd1f500 | 665 | module_param(nsm_use_hostnames, bool, 0644); |
c72a476b | 666 | module_param(nlm_max_connections, uint, 0644); |
1da177e4 | 667 | |
a9c5d73a SK |
668 | static int lockd_init_net(struct net *net) |
669 | { | |
66547b02 SK |
670 | struct lockd_net *ln = net_generic(net, lockd_net_id); |
671 | ||
672 | INIT_DELAYED_WORK(&ln->grace_period_end, grace_ender); | |
f7790029 | 673 | INIT_LIST_HEAD(&ln->lockd_manager.list); |
c87fb4a3 | 674 | ln->lockd_manager.block_opens = false; |
0ad95472 | 675 | INIT_LIST_HEAD(&ln->nsm_handles); |
a9c5d73a SK |
676 | return 0; |
677 | } | |
678 | ||
679 | static void lockd_exit_net(struct net *net) | |
680 | { | |
681 | } | |
682 | ||
683 | static struct pernet_operations lockd_net_ops = { | |
684 | .init = lockd_init_net, | |
685 | .exit = lockd_exit_net, | |
686 | .id = &lockd_net_id, | |
687 | .size = sizeof(struct lockd_net), | |
688 | }; | |
689 | ||
690 | ||
1da177e4 LT |
691 | /* |
692 | * Initialising and terminating the module. | |
693 | */ | |
694 | ||
695 | static int __init init_nlm(void) | |
696 | { | |
a9c5d73a SK |
697 | int err; |
698 | ||
90d5b180 | 699 | #ifdef CONFIG_SYSCTL |
a9c5d73a | 700 | err = -ENOMEM; |
0b4d4147 | 701 | nlm_sysctl_table = register_sysctl_table(nlm_sysctl_root); |
a9c5d73a SK |
702 | if (nlm_sysctl_table == NULL) |
703 | goto err_sysctl; | |
704 | #endif | |
705 | err = register_pernet_subsys(&lockd_net_ops); | |
706 | if (err) | |
707 | goto err_pernet; | |
d68e3c4a JL |
708 | |
709 | err = lockd_create_procfs(); | |
710 | if (err) | |
711 | goto err_procfs; | |
712 | ||
90d5b180 | 713 | return 0; |
a9c5d73a | 714 | |
d68e3c4a JL |
715 | err_procfs: |
716 | unregister_pernet_subsys(&lockd_net_ops); | |
a9c5d73a SK |
717 | err_pernet: |
718 | #ifdef CONFIG_SYSCTL | |
719 | unregister_sysctl_table(nlm_sysctl_table); | |
a9c5d73a | 720 | err_sysctl: |
12dd7ecf | 721 | #endif |
a9c5d73a | 722 | return err; |
1da177e4 LT |
723 | } |
724 | ||
725 | static void __exit exit_nlm(void) | |
726 | { | |
727 | /* FIXME: delete all NLM clients */ | |
728 | nlm_shutdown_hosts(); | |
d68e3c4a | 729 | lockd_remove_procfs(); |
a9c5d73a | 730 | unregister_pernet_subsys(&lockd_net_ops); |
90d5b180 | 731 | #ifdef CONFIG_SYSCTL |
1da177e4 | 732 | unregister_sysctl_table(nlm_sysctl_table); |
90d5b180 | 733 | #endif |
1da177e4 LT |
734 | } |
735 | ||
736 | module_init(init_nlm); | |
737 | module_exit(exit_nlm); | |
738 | ||
739 | /* | |
740 | * Define NLM program and procedures | |
741 | */ | |
7fd38af9 | 742 | static unsigned int nlmsvc_version1_count[17]; |
e9679189 CH |
743 | static const struct svc_version nlmsvc_version1 = { |
744 | .vs_vers = 1, | |
745 | .vs_nproc = 17, | |
746 | .vs_proc = nlmsvc_procedures, | |
747 | .vs_count = nlmsvc_version1_count, | |
748 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
1da177e4 | 749 | }; |
7fd38af9 | 750 | static unsigned int nlmsvc_version3_count[24]; |
e9679189 CH |
751 | static const struct svc_version nlmsvc_version3 = { |
752 | .vs_vers = 3, | |
753 | .vs_nproc = 24, | |
754 | .vs_proc = nlmsvc_procedures, | |
755 | .vs_count = nlmsvc_version3_count, | |
756 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
1da177e4 LT |
757 | }; |
758 | #ifdef CONFIG_LOCKD_V4 | |
7fd38af9 | 759 | static unsigned int nlmsvc_version4_count[24]; |
e9679189 CH |
760 | static const struct svc_version nlmsvc_version4 = { |
761 | .vs_vers = 4, | |
762 | .vs_nproc = 24, | |
763 | .vs_proc = nlmsvc_procedures4, | |
764 | .vs_count = nlmsvc_version4_count, | |
765 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
1da177e4 LT |
766 | }; |
767 | #endif | |
e9679189 | 768 | static const struct svc_version *nlmsvc_version[] = { |
1da177e4 LT |
769 | [1] = &nlmsvc_version1, |
770 | [3] = &nlmsvc_version3, | |
771 | #ifdef CONFIG_LOCKD_V4 | |
772 | [4] = &nlmsvc_version4, | |
773 | #endif | |
774 | }; | |
775 | ||
776 | static struct svc_stat nlmsvc_stats; | |
777 | ||
e8c96f8c | 778 | #define NLM_NRVERS ARRAY_SIZE(nlmsvc_version) |
1da177e4 LT |
779 | static struct svc_program nlmsvc_program = { |
780 | .pg_prog = NLM_PROGRAM, /* program number */ | |
781 | .pg_nvers = NLM_NRVERS, /* number of entries in nlmsvc_version */ | |
782 | .pg_vers = nlmsvc_version, /* version table */ | |
783 | .pg_name = "lockd", /* service name */ | |
784 | .pg_class = "nfsd", /* share authentication with nfsd */ | |
785 | .pg_stats = &nlmsvc_stats, /* stats table */ | |
786 | .pg_authenticate = &lockd_authenticate /* export authentication */ | |
787 | }; |