Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/lockd/svc.c | |
3 | * | |
4 | * This is the central lockd service. | |
5 | * | |
6 | * FIXME: Separate the lockd NFS server functionality from the lockd NFS | |
7 | * client functionality. Oh why didn't Sun create two separate | |
8 | * services in the first place? | |
9 | * | |
10 | * Authors: Olaf Kirch (okir@monad.swb.de) | |
11 | * | |
12 | * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> | |
13 | */ | |
14 | ||
1da177e4 LT |
15 | #include <linux/module.h> |
16 | #include <linux/init.h> | |
17 | #include <linux/sysctl.h> | |
18 | #include <linux/moduleparam.h> | |
19 | ||
20 | #include <linux/sched.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/in.h> | |
23 | #include <linux/uio.h> | |
1da177e4 | 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 | ||
af558e33 BF |
90 | static struct lock_manager lockd_manager = { |
91 | }; | |
9a8db97e | 92 | |
c8ab5f2a | 93 | static void grace_ender(struct work_struct *not_used) |
9a8db97e | 94 | { |
af558e33 | 95 | locks_end_grace(&lockd_manager); |
1da177e4 LT |
96 | } |
97 | ||
c8ab5f2a BF |
98 | static DECLARE_DELAYED_WORK(grace_period_end, grace_ender); |
99 | ||
100 | static void set_grace_period(void) | |
1da177e4 | 101 | { |
af558e33 | 102 | unsigned long grace_period = get_lockd_grace_period(); |
c8ab5f2a | 103 | |
af558e33 | 104 | locks_start_grace(&lockd_manager); |
c8ab5f2a BF |
105 | cancel_delayed_work_sync(&grace_period_end); |
106 | schedule_delayed_work(&grace_period_end, grace_period); | |
1da177e4 LT |
107 | } |
108 | ||
89996df4 BF |
109 | static void restart_grace(void) |
110 | { | |
111 | if (nlmsvc_ops) { | |
112 | cancel_delayed_work_sync(&grace_period_end); | |
113 | locks_end_grace(&lockd_manager); | |
114 | nlmsvc_invalidate_all(); | |
115 | set_grace_period(); | |
116 | } | |
117 | } | |
118 | ||
1da177e4 LT |
119 | /* |
120 | * This is the lockd kernel thread | |
121 | */ | |
d751a7cd JL |
122 | static int |
123 | lockd(void *vrqstp) | |
1da177e4 | 124 | { |
f97c650d | 125 | int err = 0, preverr = 0; |
d751a7cd | 126 | struct svc_rqst *rqstp = vrqstp; |
1da177e4 | 127 | |
d751a7cd | 128 | /* try_to_freeze() is called from svc_recv() */ |
83144186 | 129 | set_freezable(); |
1da177e4 | 130 | |
d751a7cd | 131 | /* Allow SIGKILL to tell lockd to drop all of its locks */ |
1da177e4 LT |
132 | allow_signal(SIGKILL); |
133 | ||
1da177e4 LT |
134 | dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n"); |
135 | ||
136 | if (!nlm_timeout) | |
137 | nlm_timeout = LOCKD_DFLT_TIMEO; | |
138 | nlmsvc_timeout = nlm_timeout * HZ; | |
139 | ||
c8ab5f2a | 140 | set_grace_period(); |
1da177e4 LT |
141 | |
142 | /* | |
143 | * The main request loop. We don't terminate until the last | |
d751a7cd | 144 | * NFS mount or NFS daemon has gone away. |
1da177e4 | 145 | */ |
d751a7cd | 146 | while (!kthread_should_stop()) { |
1da177e4 | 147 | long timeout = MAX_SCHEDULE_TIMEOUT; |
5216a8e7 | 148 | RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); |
1da177e4 | 149 | |
c72a476b JL |
150 | /* update sv_maxconn if it has changed */ |
151 | rqstp->rq_server->sv_maxconn = nlm_max_connections; | |
152 | ||
1da177e4 LT |
153 | if (signalled()) { |
154 | flush_signals(current); | |
89996df4 | 155 | restart_grace(); |
d751a7cd | 156 | continue; |
1da177e4 LT |
157 | } |
158 | ||
8fafa900 BF |
159 | timeout = nlmsvc_retry_blocked(); |
160 | ||
1da177e4 LT |
161 | /* |
162 | * Find a socket with data available and call its | |
163 | * recvfrom routine. | |
164 | */ | |
6fb2b47f | 165 | err = svc_recv(rqstp, timeout); |
f97c650d JL |
166 | if (err == -EAGAIN || err == -EINTR) { |
167 | preverr = err; | |
1da177e4 | 168 | continue; |
f97c650d | 169 | } |
1da177e4 | 170 | if (err < 0) { |
f97c650d JL |
171 | if (err != preverr) { |
172 | printk(KERN_WARNING "%s: unexpected error " | |
173 | "from svc_recv (%d)\n", __func__, err); | |
174 | preverr = err; | |
175 | } | |
176 | schedule_timeout_interruptible(HZ); | |
177 | continue; | |
1da177e4 | 178 | } |
f97c650d | 179 | preverr = err; |
1da177e4 | 180 | |
ad06e4bd CL |
181 | dprintk("lockd: request from %s\n", |
182 | svc_print_addr(rqstp, buf, sizeof(buf))); | |
1da177e4 | 183 | |
6fb2b47f | 184 | svc_process(rqstp); |
1da177e4 | 185 | } |
2bd61579 | 186 | flush_signals(current); |
c8ab5f2a | 187 | cancel_delayed_work_sync(&grace_period_end); |
2c5e7615 | 188 | locks_end_grace(&lockd_manager); |
d751a7cd JL |
189 | if (nlmsvc_ops) |
190 | nlmsvc_invalidate_all(); | |
191 | nlm_shutdown_hosts(); | |
d751a7cd | 192 | return 0; |
1da177e4 LT |
193 | } |
194 | ||
eb16e907 | 195 | static int create_lockd_listener(struct svc_serv *serv, const char *name, |
c228fa20 SK |
196 | struct net *net, const int family, |
197 | const unsigned short port) | |
d3fe5ea7 CL |
198 | { |
199 | struct svc_xprt *xprt; | |
200 | ||
c228fa20 | 201 | xprt = svc_find_xprt(serv, name, net, family, 0); |
d3fe5ea7 | 202 | if (xprt == NULL) |
c228fa20 | 203 | return svc_create_xprt(serv, name, net, family, port, |
eb16e907 | 204 | SVC_SOCK_DEFAULTS); |
d3fe5ea7 CL |
205 | svc_xprt_put(xprt); |
206 | return 0; | |
207 | } | |
208 | ||
c228fa20 SK |
209 | static int create_lockd_family(struct svc_serv *serv, struct net *net, |
210 | const int family) | |
eb16e907 CL |
211 | { |
212 | int err; | |
213 | ||
c228fa20 | 214 | err = create_lockd_listener(serv, "udp", net, family, nlm_udpport); |
eb16e907 CL |
215 | if (err < 0) |
216 | return err; | |
217 | ||
c228fa20 | 218 | return create_lockd_listener(serv, "tcp", net, family, nlm_tcpport); |
eb16e907 CL |
219 | } |
220 | ||
482fb94e | 221 | /* |
8c3916f4 CL |
222 | * Ensure there are active UDP and TCP listeners for lockd. |
223 | * | |
224 | * Even if we have only TCP NFS mounts and/or TCP NFSDs, some | |
225 | * local services (such as rpc.statd) still require UDP, and | |
226 | * some NFS servers do not yet support NLM over TCP. | |
227 | * | |
228 | * Returns zero if all listeners are available; otherwise a | |
229 | * negative errno value is returned. | |
482fb94e | 230 | */ |
c228fa20 | 231 | static int make_socks(struct svc_serv *serv, struct net *net) |
24e36663 | 232 | { |
482fb94e | 233 | static int warned; |
0dba7c2a | 234 | int err; |
482fb94e | 235 | |
c228fa20 | 236 | err = create_lockd_family(serv, net, PF_INET); |
0dba7c2a CL |
237 | if (err < 0) |
238 | goto out_err; | |
239 | ||
c228fa20 | 240 | err = create_lockd_family(serv, net, PF_INET6); |
eb16e907 | 241 | if (err < 0 && err != -EAFNOSUPPORT) |
0dba7c2a CL |
242 | goto out_err; |
243 | ||
244 | warned = 0; | |
245 | return 0; | |
246 | ||
247 | out_err: | |
248 | if (warned++ == 0) | |
7dcf91ec | 249 | printk(KERN_WARNING |
0dba7c2a | 250 | "lockd_up: makesock failed, error=%d\n", err); |
24e36663 N |
251 | return err; |
252 | } | |
253 | ||
4db77695 | 254 | static int lockd_up_net(struct svc_serv *serv, struct net *net) |
bb2224df SK |
255 | { |
256 | struct lockd_net *ln = net_generic(net, lockd_net_id); | |
bb2224df SK |
257 | int error; |
258 | ||
786185b5 | 259 | if (ln->nlmsvc_users++) |
bb2224df SK |
260 | return 0; |
261 | ||
dbf9b5d7 | 262 | error = svc_bind(serv, net); |
bb2224df | 263 | if (error) |
dbf9b5d7 | 264 | goto err_bind; |
bb2224df SK |
265 | |
266 | error = make_socks(serv, net); | |
267 | if (error < 0) | |
268 | goto err_socks; | |
269 | return 0; | |
270 | ||
271 | err_socks: | |
272 | svc_rpcb_cleanup(serv, net); | |
dbf9b5d7 | 273 | err_bind: |
786185b5 | 274 | ln->nlmsvc_users--; |
bb2224df SK |
275 | return error; |
276 | } | |
277 | ||
4db77695 | 278 | static void lockd_down_net(struct svc_serv *serv, struct net *net) |
bb2224df SK |
279 | { |
280 | struct lockd_net *ln = net_generic(net, lockd_net_id); | |
bb2224df SK |
281 | |
282 | if (ln->nlmsvc_users) { | |
3b64739f SK |
283 | if (--ln->nlmsvc_users == 0) { |
284 | nlm_shutdown_hosts_net(net); | |
bb2224df | 285 | svc_shutdown_net(serv, net); |
3b64739f | 286 | } |
bb2224df SK |
287 | } else { |
288 | printk(KERN_ERR "lockd_down_net: no users! task=%p, net=%p\n", | |
289 | nlmsvc_task, net); | |
290 | BUG(); | |
291 | } | |
292 | } | |
293 | ||
24452239 | 294 | static struct svc_serv *lockd_create_svc(void) |
1da177e4 | 295 | { |
d751a7cd | 296 | struct svc_serv *serv; |
1da177e4 | 297 | |
1da177e4 LT |
298 | /* |
299 | * Check whether we're already up and running. | |
300 | */ | |
bb2224df | 301 | if (nlmsvc_rqst) { |
24452239 SK |
302 | /* |
303 | * Note: increase service usage, because later in case of error | |
304 | * svc_destroy() will be called. | |
305 | */ | |
306 | svc_get(nlmsvc_rqst->rq_server); | |
307 | return nlmsvc_rqst->rq_server; | |
bb2224df | 308 | } |
1da177e4 LT |
309 | |
310 | /* | |
311 | * Sanity check: if there's no pid, | |
312 | * we should be the first user ... | |
313 | */ | |
4a3ae42d | 314 | if (nlmsvc_users) |
1da177e4 LT |
315 | printk(KERN_WARNING |
316 | "lockd_up: no pid, %d users??\n", nlmsvc_users); | |
317 | ||
49a9072f | 318 | serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, NULL); |
1da177e4 LT |
319 | if (!serv) { |
320 | printk(KERN_WARNING "lockd_up: create service failed\n"); | |
24452239 SK |
321 | return ERR_PTR(-ENOMEM); |
322 | } | |
323 | return serv; | |
324 | } | |
325 | ||
326 | /* | |
327 | * Bring up the lockd process if it's not already up. | |
328 | */ | |
329 | int lockd_up(struct net *net) | |
330 | { | |
331 | struct svc_serv *serv; | |
7d13ec76 | 332 | int error; |
24452239 SK |
333 | |
334 | mutex_lock(&nlmsvc_mutex); | |
335 | ||
336 | serv = lockd_create_svc(); | |
337 | if (IS_ERR(serv)) { | |
338 | error = PTR_ERR(serv); | |
339 | goto err_create; | |
1da177e4 LT |
340 | } |
341 | ||
dbf9b5d7 | 342 | error = lockd_up_net(serv, net); |
8c3916f4 | 343 | if (error < 0) |
dbf9b5d7 | 344 | goto err_net; |
1da177e4 LT |
345 | |
346 | /* | |
347 | * Create the kernel thread and wait for it to start. | |
348 | */ | |
11fd165c | 349 | nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE); |
abd1ec4e JL |
350 | if (IS_ERR(nlmsvc_rqst)) { |
351 | error = PTR_ERR(nlmsvc_rqst); | |
352 | nlmsvc_rqst = NULL; | |
d751a7cd JL |
353 | printk(KERN_WARNING |
354 | "lockd_up: svc_rqst allocation failed, error=%d\n", | |
355 | error); | |
786185b5 | 356 | goto err_start; |
d751a7cd JL |
357 | } |
358 | ||
359 | svc_sock_update_bufs(serv); | |
c72a476b | 360 | serv->sv_maxconn = nlm_max_connections; |
d751a7cd | 361 | |
abd1ec4e | 362 | nlmsvc_task = kthread_run(lockd, nlmsvc_rqst, serv->sv_name); |
d751a7cd JL |
363 | if (IS_ERR(nlmsvc_task)) { |
364 | error = PTR_ERR(nlmsvc_task); | |
abd1ec4e | 365 | svc_exit_thread(nlmsvc_rqst); |
d751a7cd | 366 | nlmsvc_task = NULL; |
abd1ec4e | 367 | nlmsvc_rqst = NULL; |
1da177e4 | 368 | printk(KERN_WARNING |
d751a7cd | 369 | "lockd_up: kthread_run failed, error=%d\n", error); |
786185b5 | 370 | goto err_start; |
1da177e4 | 371 | } |
1da177e4 | 372 | |
7d13ec76 | 373 | nlmsvc_users++; |
1da177e4 LT |
374 | /* |
375 | * Note: svc_serv structures have an initial use count of 1, | |
376 | * so we exit through here on both success and failure. | |
377 | */ | |
dbf9b5d7 | 378 | err_net: |
1da177e4 | 379 | svc_destroy(serv); |
24452239 | 380 | err_create: |
353ab6e9 | 381 | mutex_unlock(&nlmsvc_mutex); |
1da177e4 | 382 | return error; |
786185b5 SK |
383 | |
384 | err_start: | |
4db77695 | 385 | lockd_down_net(serv, net); |
dbf9b5d7 | 386 | goto err_net; |
1da177e4 | 387 | } |
2de59872 | 388 | EXPORT_SYMBOL_GPL(lockd_up); |
1da177e4 LT |
389 | |
390 | /* | |
391 | * Decrement the user count and bring down lockd if we're the last. | |
392 | */ | |
393 | void | |
e3f70ead | 394 | lockd_down(struct net *net) |
1da177e4 | 395 | { |
353ab6e9 | 396 | mutex_lock(&nlmsvc_mutex); |
4db77695 | 397 | lockd_down_net(nlmsvc_rqst->rq_server, net); |
1da177e4 | 398 | if (nlmsvc_users) { |
786185b5 | 399 | if (--nlmsvc_users) |
1da177e4 | 400 | goto out; |
d751a7cd JL |
401 | } else { |
402 | printk(KERN_ERR "lockd_down: no users! task=%p\n", | |
403 | nlmsvc_task); | |
404 | BUG(); | |
1da177e4 | 405 | } |
1da177e4 | 406 | |
d751a7cd JL |
407 | if (!nlmsvc_task) { |
408 | printk(KERN_ERR "lockd_down: no lockd running.\n"); | |
409 | BUG(); | |
1da177e4 | 410 | } |
d751a7cd | 411 | kthread_stop(nlmsvc_task); |
abd1ec4e JL |
412 | svc_exit_thread(nlmsvc_rqst); |
413 | nlmsvc_task = NULL; | |
414 | nlmsvc_rqst = NULL; | |
1da177e4 | 415 | out: |
353ab6e9 | 416 | mutex_unlock(&nlmsvc_mutex); |
1da177e4 | 417 | } |
2de59872 | 418 | EXPORT_SYMBOL_GPL(lockd_down); |
1da177e4 | 419 | |
90d5b180 CL |
420 | #ifdef CONFIG_SYSCTL |
421 | ||
1da177e4 LT |
422 | /* |
423 | * Sysctl parameters (same as module parameters, different interface). | |
424 | */ | |
425 | ||
1da177e4 LT |
426 | static ctl_table nlm_sysctls[] = { |
427 | { | |
1da177e4 LT |
428 | .procname = "nlm_grace_period", |
429 | .data = &nlm_grace_period, | |
7ee91ec1 | 430 | .maxlen = sizeof(unsigned long), |
1da177e4 | 431 | .mode = 0644, |
6d456111 | 432 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
433 | .extra1 = (unsigned long *) &nlm_grace_period_min, |
434 | .extra2 = (unsigned long *) &nlm_grace_period_max, | |
435 | }, | |
436 | { | |
1da177e4 LT |
437 | .procname = "nlm_timeout", |
438 | .data = &nlm_timeout, | |
7ee91ec1 | 439 | .maxlen = sizeof(unsigned long), |
1da177e4 | 440 | .mode = 0644, |
6d456111 | 441 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
442 | .extra1 = (unsigned long *) &nlm_timeout_min, |
443 | .extra2 = (unsigned long *) &nlm_timeout_max, | |
444 | }, | |
445 | { | |
1da177e4 LT |
446 | .procname = "nlm_udpport", |
447 | .data = &nlm_udpport, | |
448 | .maxlen = sizeof(int), | |
449 | .mode = 0644, | |
6d456111 | 450 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
451 | .extra1 = (int *) &nlm_port_min, |
452 | .extra2 = (int *) &nlm_port_max, | |
453 | }, | |
454 | { | |
1da177e4 LT |
455 | .procname = "nlm_tcpport", |
456 | .data = &nlm_tcpport, | |
457 | .maxlen = sizeof(int), | |
458 | .mode = 0644, | |
6d456111 | 459 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
460 | .extra1 = (int *) &nlm_port_min, |
461 | .extra2 = (int *) &nlm_port_max, | |
462 | }, | |
abd1f500 | 463 | { |
abd1f500 OK |
464 | .procname = "nsm_use_hostnames", |
465 | .data = &nsm_use_hostnames, | |
466 | .maxlen = sizeof(int), | |
467 | .mode = 0644, | |
6d456111 | 468 | .proc_handler = proc_dointvec, |
abd1f500 | 469 | }, |
460f5cac | 470 | { |
460f5cac OK |
471 | .procname = "nsm_local_state", |
472 | .data = &nsm_local_state, | |
473 | .maxlen = sizeof(int), | |
474 | .mode = 0644, | |
6d456111 | 475 | .proc_handler = proc_dointvec, |
460f5cac | 476 | }, |
ab09203e | 477 | { } |
1da177e4 LT |
478 | }; |
479 | ||
480 | static ctl_table nlm_sysctl_dir[] = { | |
481 | { | |
1da177e4 LT |
482 | .procname = "nfs", |
483 | .mode = 0555, | |
484 | .child = nlm_sysctls, | |
485 | }, | |
ab09203e | 486 | { } |
1da177e4 LT |
487 | }; |
488 | ||
489 | static ctl_table nlm_sysctl_root[] = { | |
490 | { | |
1da177e4 LT |
491 | .procname = "fs", |
492 | .mode = 0555, | |
493 | .child = nlm_sysctl_dir, | |
494 | }, | |
ab09203e | 495 | { } |
1da177e4 LT |
496 | }; |
497 | ||
90d5b180 CL |
498 | #endif /* CONFIG_SYSCTL */ |
499 | ||
1da177e4 | 500 | /* |
405ae7d3 | 501 | * Module (and sysfs) parameters. |
1da177e4 LT |
502 | */ |
503 | ||
504 | #define param_set_min_max(name, type, which_strtol, min, max) \ | |
505 | static int param_set_##name(const char *val, struct kernel_param *kp) \ | |
506 | { \ | |
507 | char *endp; \ | |
508 | __typeof__(type) num = which_strtol(val, &endp, 0); \ | |
509 | if (endp == val || *endp || num < (min) || num > (max)) \ | |
510 | return -EINVAL; \ | |
de5b8e8e | 511 | *((type *) kp->arg) = num; \ |
1da177e4 LT |
512 | return 0; \ |
513 | } | |
514 | ||
515 | static inline int is_callback(u32 proc) | |
516 | { | |
517 | return proc == NLMPROC_GRANTED | |
518 | || proc == NLMPROC_GRANTED_MSG | |
519 | || proc == NLMPROC_TEST_RES | |
520 | || proc == NLMPROC_LOCK_RES | |
521 | || proc == NLMPROC_CANCEL_RES | |
522 | || proc == NLMPROC_UNLOCK_RES | |
523 | || proc == NLMPROC_NSM_NOTIFY; | |
524 | } | |
525 | ||
526 | ||
527 | static int lockd_authenticate(struct svc_rqst *rqstp) | |
528 | { | |
529 | rqstp->rq_client = NULL; | |
530 | switch (rqstp->rq_authop->flavour) { | |
531 | case RPC_AUTH_NULL: | |
532 | case RPC_AUTH_UNIX: | |
533 | if (rqstp->rq_proc == 0) | |
534 | return SVC_OK; | |
535 | if (is_callback(rqstp->rq_proc)) { | |
536 | /* Leave it to individual procedures to | |
537 | * call nlmsvc_lookup_host(rqstp) | |
538 | */ | |
539 | return SVC_OK; | |
540 | } | |
541 | return svc_set_client(rqstp); | |
542 | } | |
543 | return SVC_DENIED; | |
544 | } | |
545 | ||
546 | ||
547 | param_set_min_max(port, int, simple_strtol, 0, 65535) | |
548 | param_set_min_max(grace_period, unsigned long, simple_strtoul, | |
549 | nlm_grace_period_min, nlm_grace_period_max) | |
550 | param_set_min_max(timeout, unsigned long, simple_strtoul, | |
551 | nlm_timeout_min, nlm_timeout_max) | |
552 | ||
553 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
554 | MODULE_DESCRIPTION("NFS file locking service version " LOCKD_VERSION "."); | |
555 | MODULE_LICENSE("GPL"); | |
556 | ||
557 | module_param_call(nlm_grace_period, param_set_grace_period, param_get_ulong, | |
558 | &nlm_grace_period, 0644); | |
559 | module_param_call(nlm_timeout, param_set_timeout, param_get_ulong, | |
560 | &nlm_timeout, 0644); | |
561 | module_param_call(nlm_udpport, param_set_port, param_get_int, | |
562 | &nlm_udpport, 0644); | |
563 | module_param_call(nlm_tcpport, param_set_port, param_get_int, | |
564 | &nlm_tcpport, 0644); | |
abd1f500 | 565 | module_param(nsm_use_hostnames, bool, 0644); |
c72a476b | 566 | module_param(nlm_max_connections, uint, 0644); |
1da177e4 | 567 | |
a9c5d73a SK |
568 | static int lockd_init_net(struct net *net) |
569 | { | |
570 | return 0; | |
571 | } | |
572 | ||
573 | static void lockd_exit_net(struct net *net) | |
574 | { | |
575 | } | |
576 | ||
577 | static struct pernet_operations lockd_net_ops = { | |
578 | .init = lockd_init_net, | |
579 | .exit = lockd_exit_net, | |
580 | .id = &lockd_net_id, | |
581 | .size = sizeof(struct lockd_net), | |
582 | }; | |
583 | ||
584 | ||
1da177e4 LT |
585 | /* |
586 | * Initialising and terminating the module. | |
587 | */ | |
588 | ||
589 | static int __init init_nlm(void) | |
590 | { | |
a9c5d73a SK |
591 | int err; |
592 | ||
90d5b180 | 593 | #ifdef CONFIG_SYSCTL |
a9c5d73a | 594 | err = -ENOMEM; |
0b4d4147 | 595 | nlm_sysctl_table = register_sysctl_table(nlm_sysctl_root); |
a9c5d73a SK |
596 | if (nlm_sysctl_table == NULL) |
597 | goto err_sysctl; | |
598 | #endif | |
599 | err = register_pernet_subsys(&lockd_net_ops); | |
600 | if (err) | |
601 | goto err_pernet; | |
90d5b180 | 602 | return 0; |
a9c5d73a SK |
603 | |
604 | err_pernet: | |
605 | #ifdef CONFIG_SYSCTL | |
606 | unregister_sysctl_table(nlm_sysctl_table); | |
90d5b180 | 607 | #endif |
a9c5d73a SK |
608 | err_sysctl: |
609 | return err; | |
1da177e4 LT |
610 | } |
611 | ||
612 | static void __exit exit_nlm(void) | |
613 | { | |
614 | /* FIXME: delete all NLM clients */ | |
615 | nlm_shutdown_hosts(); | |
a9c5d73a | 616 | unregister_pernet_subsys(&lockd_net_ops); |
90d5b180 | 617 | #ifdef CONFIG_SYSCTL |
1da177e4 | 618 | unregister_sysctl_table(nlm_sysctl_table); |
90d5b180 | 619 | #endif |
1da177e4 LT |
620 | } |
621 | ||
622 | module_init(init_nlm); | |
623 | module_exit(exit_nlm); | |
624 | ||
625 | /* | |
626 | * Define NLM program and procedures | |
627 | */ | |
628 | static struct svc_version nlmsvc_version1 = { | |
629 | .vs_vers = 1, | |
630 | .vs_nproc = 17, | |
631 | .vs_proc = nlmsvc_procedures, | |
632 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
633 | }; | |
634 | static struct svc_version nlmsvc_version3 = { | |
635 | .vs_vers = 3, | |
636 | .vs_nproc = 24, | |
637 | .vs_proc = nlmsvc_procedures, | |
638 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
639 | }; | |
640 | #ifdef CONFIG_LOCKD_V4 | |
641 | static struct svc_version nlmsvc_version4 = { | |
642 | .vs_vers = 4, | |
643 | .vs_nproc = 24, | |
644 | .vs_proc = nlmsvc_procedures4, | |
645 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
646 | }; | |
647 | #endif | |
648 | static struct svc_version * nlmsvc_version[] = { | |
649 | [1] = &nlmsvc_version1, | |
650 | [3] = &nlmsvc_version3, | |
651 | #ifdef CONFIG_LOCKD_V4 | |
652 | [4] = &nlmsvc_version4, | |
653 | #endif | |
654 | }; | |
655 | ||
656 | static struct svc_stat nlmsvc_stats; | |
657 | ||
e8c96f8c | 658 | #define NLM_NRVERS ARRAY_SIZE(nlmsvc_version) |
1da177e4 LT |
659 | static struct svc_program nlmsvc_program = { |
660 | .pg_prog = NLM_PROGRAM, /* program number */ | |
661 | .pg_nvers = NLM_NRVERS, /* number of entries in nlmsvc_version */ | |
662 | .pg_vers = nlmsvc_version, /* version table */ | |
663 | .pg_name = "lockd", /* service name */ | |
664 | .pg_class = "nfsd", /* share authentication with nfsd */ | |
665 | .pg_stats = &nlmsvc_stats, /* stats table */ | |
666 | .pg_authenticate = &lockd_authenticate /* export authentication */ | |
667 | }; |