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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); |
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) | |
256 | goto err_socks; | |
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 | ||
261 | err_socks: | |
262 | svc_rpcb_cleanup(serv, net); | |
dbf9b5d7 | 263 | err_bind: |
786185b5 | 264 | ln->nlmsvc_users--; |
bb2224df SK |
265 | return error; |
266 | } | |
267 | ||
4db77695 | 268 | static void lockd_down_net(struct svc_serv *serv, struct net *net) |
bb2224df SK |
269 | { |
270 | struct lockd_net *ln = net_generic(net, lockd_net_id); | |
bb2224df SK |
271 | |
272 | if (ln->nlmsvc_users) { | |
3b64739f SK |
273 | if (--ln->nlmsvc_users == 0) { |
274 | nlm_shutdown_hosts_net(net); | |
5630f7fa SK |
275 | cancel_delayed_work_sync(&ln->grace_period_end); |
276 | locks_end_grace(&ln->lockd_manager); | |
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 | ||
3d1221df SK |
287 | static int lockd_start_svc(struct svc_serv *serv) |
288 | { | |
289 | int error; | |
290 | ||
291 | if (nlmsvc_rqst) | |
292 | return 0; | |
293 | ||
294 | /* | |
295 | * Create the kernel thread and wait for it to start. | |
296 | */ | |
297 | nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE); | |
298 | if (IS_ERR(nlmsvc_rqst)) { | |
299 | error = PTR_ERR(nlmsvc_rqst); | |
300 | printk(KERN_WARNING | |
301 | "lockd_up: svc_rqst allocation failed, error=%d\n", | |
302 | error); | |
303 | goto out_rqst; | |
304 | } | |
305 | ||
306 | svc_sock_update_bufs(serv); | |
307 | serv->sv_maxconn = nlm_max_connections; | |
308 | ||
f170168b | 309 | nlmsvc_task = kthread_run(lockd, nlmsvc_rqst, "%s", serv->sv_name); |
3d1221df SK |
310 | if (IS_ERR(nlmsvc_task)) { |
311 | error = PTR_ERR(nlmsvc_task); | |
312 | printk(KERN_WARNING | |
313 | "lockd_up: kthread_run failed, error=%d\n", error); | |
314 | goto out_task; | |
315 | } | |
316 | dprintk("lockd_up: service started\n"); | |
317 | return 0; | |
318 | ||
319 | out_task: | |
320 | svc_exit_thread(nlmsvc_rqst); | |
321 | nlmsvc_task = NULL; | |
322 | out_rqst: | |
323 | nlmsvc_rqst = NULL; | |
324 | return error; | |
325 | } | |
326 | ||
24452239 | 327 | static struct svc_serv *lockd_create_svc(void) |
1da177e4 | 328 | { |
d751a7cd | 329 | struct svc_serv *serv; |
1da177e4 | 330 | |
1da177e4 LT |
331 | /* |
332 | * Check whether we're already up and running. | |
333 | */ | |
bb2224df | 334 | if (nlmsvc_rqst) { |
24452239 SK |
335 | /* |
336 | * Note: increase service usage, because later in case of error | |
337 | * svc_destroy() will be called. | |
338 | */ | |
339 | svc_get(nlmsvc_rqst->rq_server); | |
340 | return nlmsvc_rqst->rq_server; | |
bb2224df | 341 | } |
1da177e4 LT |
342 | |
343 | /* | |
344 | * Sanity check: if there's no pid, | |
345 | * we should be the first user ... | |
346 | */ | |
4a3ae42d | 347 | if (nlmsvc_users) |
1da177e4 LT |
348 | printk(KERN_WARNING |
349 | "lockd_up: no pid, %d users??\n", nlmsvc_users); | |
350 | ||
49a9072f | 351 | serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, NULL); |
1da177e4 LT |
352 | if (!serv) { |
353 | printk(KERN_WARNING "lockd_up: create service failed\n"); | |
24452239 SK |
354 | return ERR_PTR(-ENOMEM); |
355 | } | |
8dbf28e4 | 356 | dprintk("lockd_up: service created\n"); |
24452239 SK |
357 | return serv; |
358 | } | |
359 | ||
360 | /* | |
361 | * Bring up the lockd process if it's not already up. | |
362 | */ | |
363 | int lockd_up(struct net *net) | |
364 | { | |
365 | struct svc_serv *serv; | |
7d13ec76 | 366 | int error; |
24452239 SK |
367 | |
368 | mutex_lock(&nlmsvc_mutex); | |
369 | ||
370 | serv = lockd_create_svc(); | |
371 | if (IS_ERR(serv)) { | |
372 | error = PTR_ERR(serv); | |
373 | goto err_create; | |
1da177e4 LT |
374 | } |
375 | ||
dbf9b5d7 | 376 | error = lockd_up_net(serv, net); |
8c3916f4 | 377 | if (error < 0) |
dbf9b5d7 | 378 | goto err_net; |
1da177e4 | 379 | |
3d1221df SK |
380 | error = lockd_start_svc(serv); |
381 | if (error < 0) | |
786185b5 | 382 | goto err_start; |
1da177e4 | 383 | |
7d13ec76 | 384 | nlmsvc_users++; |
1da177e4 LT |
385 | /* |
386 | * Note: svc_serv structures have an initial use count of 1, | |
387 | * so we exit through here on both success and failure. | |
388 | */ | |
dbf9b5d7 | 389 | err_net: |
1da177e4 | 390 | svc_destroy(serv); |
24452239 | 391 | err_create: |
353ab6e9 | 392 | mutex_unlock(&nlmsvc_mutex); |
1da177e4 | 393 | return error; |
786185b5 SK |
394 | |
395 | err_start: | |
4db77695 | 396 | lockd_down_net(serv, net); |
dbf9b5d7 | 397 | goto err_net; |
1da177e4 | 398 | } |
2de59872 | 399 | EXPORT_SYMBOL_GPL(lockd_up); |
1da177e4 LT |
400 | |
401 | /* | |
402 | * Decrement the user count and bring down lockd if we're the last. | |
403 | */ | |
404 | void | |
e3f70ead | 405 | lockd_down(struct net *net) |
1da177e4 | 406 | { |
353ab6e9 | 407 | mutex_lock(&nlmsvc_mutex); |
4db77695 | 408 | lockd_down_net(nlmsvc_rqst->rq_server, net); |
1da177e4 | 409 | if (nlmsvc_users) { |
786185b5 | 410 | if (--nlmsvc_users) |
1da177e4 | 411 | goto out; |
d751a7cd JL |
412 | } else { |
413 | printk(KERN_ERR "lockd_down: no users! task=%p\n", | |
414 | nlmsvc_task); | |
415 | BUG(); | |
1da177e4 | 416 | } |
1da177e4 | 417 | |
d751a7cd JL |
418 | if (!nlmsvc_task) { |
419 | printk(KERN_ERR "lockd_down: no lockd running.\n"); | |
420 | BUG(); | |
1da177e4 | 421 | } |
d751a7cd | 422 | kthread_stop(nlmsvc_task); |
8dbf28e4 | 423 | dprintk("lockd_down: service stopped\n"); |
abd1ec4e | 424 | svc_exit_thread(nlmsvc_rqst); |
8dbf28e4 | 425 | dprintk("lockd_down: service destroyed\n"); |
abd1ec4e JL |
426 | nlmsvc_task = NULL; |
427 | nlmsvc_rqst = NULL; | |
1da177e4 | 428 | out: |
353ab6e9 | 429 | mutex_unlock(&nlmsvc_mutex); |
1da177e4 | 430 | } |
2de59872 | 431 | EXPORT_SYMBOL_GPL(lockd_down); |
1da177e4 | 432 | |
90d5b180 CL |
433 | #ifdef CONFIG_SYSCTL |
434 | ||
1da177e4 LT |
435 | /* |
436 | * Sysctl parameters (same as module parameters, different interface). | |
437 | */ | |
438 | ||
1da177e4 LT |
439 | static ctl_table nlm_sysctls[] = { |
440 | { | |
1da177e4 LT |
441 | .procname = "nlm_grace_period", |
442 | .data = &nlm_grace_period, | |
7ee91ec1 | 443 | .maxlen = sizeof(unsigned long), |
1da177e4 | 444 | .mode = 0644, |
6d456111 | 445 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
446 | .extra1 = (unsigned long *) &nlm_grace_period_min, |
447 | .extra2 = (unsigned long *) &nlm_grace_period_max, | |
448 | }, | |
449 | { | |
1da177e4 LT |
450 | .procname = "nlm_timeout", |
451 | .data = &nlm_timeout, | |
7ee91ec1 | 452 | .maxlen = sizeof(unsigned long), |
1da177e4 | 453 | .mode = 0644, |
6d456111 | 454 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
455 | .extra1 = (unsigned long *) &nlm_timeout_min, |
456 | .extra2 = (unsigned long *) &nlm_timeout_max, | |
457 | }, | |
458 | { | |
1da177e4 LT |
459 | .procname = "nlm_udpport", |
460 | .data = &nlm_udpport, | |
461 | .maxlen = sizeof(int), | |
462 | .mode = 0644, | |
6d456111 | 463 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
464 | .extra1 = (int *) &nlm_port_min, |
465 | .extra2 = (int *) &nlm_port_max, | |
466 | }, | |
467 | { | |
1da177e4 LT |
468 | .procname = "nlm_tcpport", |
469 | .data = &nlm_tcpport, | |
470 | .maxlen = sizeof(int), | |
471 | .mode = 0644, | |
6d456111 | 472 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
473 | .extra1 = (int *) &nlm_port_min, |
474 | .extra2 = (int *) &nlm_port_max, | |
475 | }, | |
abd1f500 | 476 | { |
abd1f500 OK |
477 | .procname = "nsm_use_hostnames", |
478 | .data = &nsm_use_hostnames, | |
479 | .maxlen = sizeof(int), | |
480 | .mode = 0644, | |
6d456111 | 481 | .proc_handler = proc_dointvec, |
abd1f500 | 482 | }, |
460f5cac | 483 | { |
460f5cac OK |
484 | .procname = "nsm_local_state", |
485 | .data = &nsm_local_state, | |
486 | .maxlen = sizeof(int), | |
487 | .mode = 0644, | |
6d456111 | 488 | .proc_handler = proc_dointvec, |
460f5cac | 489 | }, |
ab09203e | 490 | { } |
1da177e4 LT |
491 | }; |
492 | ||
493 | static ctl_table nlm_sysctl_dir[] = { | |
494 | { | |
1da177e4 LT |
495 | .procname = "nfs", |
496 | .mode = 0555, | |
497 | .child = nlm_sysctls, | |
498 | }, | |
ab09203e | 499 | { } |
1da177e4 LT |
500 | }; |
501 | ||
502 | static ctl_table nlm_sysctl_root[] = { | |
503 | { | |
1da177e4 LT |
504 | .procname = "fs", |
505 | .mode = 0555, | |
506 | .child = nlm_sysctl_dir, | |
507 | }, | |
ab09203e | 508 | { } |
1da177e4 LT |
509 | }; |
510 | ||
90d5b180 CL |
511 | #endif /* CONFIG_SYSCTL */ |
512 | ||
1da177e4 | 513 | /* |
405ae7d3 | 514 | * Module (and sysfs) parameters. |
1da177e4 LT |
515 | */ |
516 | ||
517 | #define param_set_min_max(name, type, which_strtol, min, max) \ | |
518 | static int param_set_##name(const char *val, struct kernel_param *kp) \ | |
519 | { \ | |
520 | char *endp; \ | |
521 | __typeof__(type) num = which_strtol(val, &endp, 0); \ | |
522 | if (endp == val || *endp || num < (min) || num > (max)) \ | |
523 | return -EINVAL; \ | |
de5b8e8e | 524 | *((type *) kp->arg) = num; \ |
1da177e4 LT |
525 | return 0; \ |
526 | } | |
527 | ||
528 | static inline int is_callback(u32 proc) | |
529 | { | |
530 | return proc == NLMPROC_GRANTED | |
531 | || proc == NLMPROC_GRANTED_MSG | |
532 | || proc == NLMPROC_TEST_RES | |
533 | || proc == NLMPROC_LOCK_RES | |
534 | || proc == NLMPROC_CANCEL_RES | |
535 | || proc == NLMPROC_UNLOCK_RES | |
536 | || proc == NLMPROC_NSM_NOTIFY; | |
537 | } | |
538 | ||
539 | ||
540 | static int lockd_authenticate(struct svc_rqst *rqstp) | |
541 | { | |
542 | rqstp->rq_client = NULL; | |
543 | switch (rqstp->rq_authop->flavour) { | |
544 | case RPC_AUTH_NULL: | |
545 | case RPC_AUTH_UNIX: | |
546 | if (rqstp->rq_proc == 0) | |
547 | return SVC_OK; | |
548 | if (is_callback(rqstp->rq_proc)) { | |
549 | /* Leave it to individual procedures to | |
550 | * call nlmsvc_lookup_host(rqstp) | |
551 | */ | |
552 | return SVC_OK; | |
553 | } | |
554 | return svc_set_client(rqstp); | |
555 | } | |
556 | return SVC_DENIED; | |
557 | } | |
558 | ||
559 | ||
560 | param_set_min_max(port, int, simple_strtol, 0, 65535) | |
561 | param_set_min_max(grace_period, unsigned long, simple_strtoul, | |
562 | nlm_grace_period_min, nlm_grace_period_max) | |
563 | param_set_min_max(timeout, unsigned long, simple_strtoul, | |
564 | nlm_timeout_min, nlm_timeout_max) | |
565 | ||
566 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
567 | MODULE_DESCRIPTION("NFS file locking service version " LOCKD_VERSION "."); | |
568 | MODULE_LICENSE("GPL"); | |
569 | ||
570 | module_param_call(nlm_grace_period, param_set_grace_period, param_get_ulong, | |
571 | &nlm_grace_period, 0644); | |
572 | module_param_call(nlm_timeout, param_set_timeout, param_get_ulong, | |
573 | &nlm_timeout, 0644); | |
574 | module_param_call(nlm_udpport, param_set_port, param_get_int, | |
575 | &nlm_udpport, 0644); | |
576 | module_param_call(nlm_tcpport, param_set_port, param_get_int, | |
577 | &nlm_tcpport, 0644); | |
abd1f500 | 578 | module_param(nsm_use_hostnames, bool, 0644); |
c72a476b | 579 | module_param(nlm_max_connections, uint, 0644); |
1da177e4 | 580 | |
a9c5d73a SK |
581 | static int lockd_init_net(struct net *net) |
582 | { | |
66547b02 SK |
583 | struct lockd_net *ln = net_generic(net, lockd_net_id); |
584 | ||
585 | INIT_DELAYED_WORK(&ln->grace_period_end, grace_ender); | |
db9c4553 | 586 | INIT_LIST_HEAD(&ln->grace_list); |
e9406db2 | 587 | spin_lock_init(&ln->nsm_clnt_lock); |
a9c5d73a SK |
588 | return 0; |
589 | } | |
590 | ||
591 | static void lockd_exit_net(struct net *net) | |
592 | { | |
593 | } | |
594 | ||
595 | static struct pernet_operations lockd_net_ops = { | |
596 | .init = lockd_init_net, | |
597 | .exit = lockd_exit_net, | |
598 | .id = &lockd_net_id, | |
599 | .size = sizeof(struct lockd_net), | |
600 | }; | |
601 | ||
602 | ||
1da177e4 LT |
603 | /* |
604 | * Initialising and terminating the module. | |
605 | */ | |
606 | ||
607 | static int __init init_nlm(void) | |
608 | { | |
a9c5d73a SK |
609 | int err; |
610 | ||
90d5b180 | 611 | #ifdef CONFIG_SYSCTL |
a9c5d73a | 612 | err = -ENOMEM; |
0b4d4147 | 613 | nlm_sysctl_table = register_sysctl_table(nlm_sysctl_root); |
a9c5d73a SK |
614 | if (nlm_sysctl_table == NULL) |
615 | goto err_sysctl; | |
616 | #endif | |
617 | err = register_pernet_subsys(&lockd_net_ops); | |
618 | if (err) | |
619 | goto err_pernet; | |
90d5b180 | 620 | return 0; |
a9c5d73a SK |
621 | |
622 | err_pernet: | |
623 | #ifdef CONFIG_SYSCTL | |
624 | unregister_sysctl_table(nlm_sysctl_table); | |
90d5b180 | 625 | #endif |
a9c5d73a SK |
626 | err_sysctl: |
627 | return err; | |
1da177e4 LT |
628 | } |
629 | ||
630 | static void __exit exit_nlm(void) | |
631 | { | |
632 | /* FIXME: delete all NLM clients */ | |
633 | nlm_shutdown_hosts(); | |
a9c5d73a | 634 | unregister_pernet_subsys(&lockd_net_ops); |
90d5b180 | 635 | #ifdef CONFIG_SYSCTL |
1da177e4 | 636 | unregister_sysctl_table(nlm_sysctl_table); |
90d5b180 | 637 | #endif |
1da177e4 LT |
638 | } |
639 | ||
640 | module_init(init_nlm); | |
641 | module_exit(exit_nlm); | |
642 | ||
643 | /* | |
644 | * Define NLM program and procedures | |
645 | */ | |
646 | static struct svc_version nlmsvc_version1 = { | |
647 | .vs_vers = 1, | |
648 | .vs_nproc = 17, | |
649 | .vs_proc = nlmsvc_procedures, | |
650 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
651 | }; | |
652 | static struct svc_version nlmsvc_version3 = { | |
653 | .vs_vers = 3, | |
654 | .vs_nproc = 24, | |
655 | .vs_proc = nlmsvc_procedures, | |
656 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
657 | }; | |
658 | #ifdef CONFIG_LOCKD_V4 | |
659 | static struct svc_version nlmsvc_version4 = { | |
660 | .vs_vers = 4, | |
661 | .vs_nproc = 24, | |
662 | .vs_proc = nlmsvc_procedures4, | |
663 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
664 | }; | |
665 | #endif | |
666 | static struct svc_version * nlmsvc_version[] = { | |
667 | [1] = &nlmsvc_version1, | |
668 | [3] = &nlmsvc_version3, | |
669 | #ifdef CONFIG_LOCKD_V4 | |
670 | [4] = &nlmsvc_version4, | |
671 | #endif | |
672 | }; | |
673 | ||
674 | static struct svc_stat nlmsvc_stats; | |
675 | ||
e8c96f8c | 676 | #define NLM_NRVERS ARRAY_SIZE(nlmsvc_version) |
1da177e4 LT |
677 | static struct svc_program nlmsvc_program = { |
678 | .pg_prog = NLM_PROGRAM, /* program number */ | |
679 | .pg_nvers = NLM_NRVERS, /* number of entries in nlmsvc_version */ | |
680 | .pg_vers = nlmsvc_version, /* version table */ | |
681 | .pg_name = "lockd", /* service name */ | |
682 | .pg_class = "nfsd", /* share authentication with nfsd */ | |
683 | .pg_stats = &nlmsvc_stats, /* stats table */ | |
684 | .pg_authenticate = &lockd_authenticate /* export authentication */ | |
685 | }; |