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 | 38 | #include "netns.h" |
d68e3c4a | 39 | #include "procfs.h" |
a9c5d73a | 40 | |
1da177e4 LT |
41 | #define NLMDBG_FACILITY NLMDBG_SVC |
42 | #define LOCKD_BUFSIZE (1024 + NLMSVC_XDRSIZE) | |
43 | #define ALLOWED_SIGS (sigmask(SIGKILL)) | |
44 | ||
45 | static struct svc_program nlmsvc_program; | |
46 | ||
47 | struct nlmsvc_binding * nlmsvc_ops; | |
2de59872 | 48 | EXPORT_SYMBOL_GPL(nlmsvc_ops); |
1da177e4 | 49 | |
353ab6e9 | 50 | static DEFINE_MUTEX(nlmsvc_mutex); |
1da177e4 | 51 | static unsigned int nlmsvc_users; |
d751a7cd | 52 | static struct task_struct *nlmsvc_task; |
abd1ec4e | 53 | static struct svc_rqst *nlmsvc_rqst; |
1da177e4 LT |
54 | unsigned long nlmsvc_timeout; |
55 | ||
a9c5d73a SK |
56 | int lockd_net_id; |
57 | ||
1da177e4 LT |
58 | /* |
59 | * These can be set at insmod time (useful for NFS as root filesystem), | |
60 | * and also changed through the sysctl interface. -- Jamie Lokier, Aug 2003 | |
61 | */ | |
62 | static unsigned long nlm_grace_period; | |
63 | static unsigned long nlm_timeout = LOCKD_DFLT_TIMEO; | |
64 | static int nlm_udpport, nlm_tcpport; | |
65 | ||
c72a476b JL |
66 | /* RLIM_NOFILE defaults to 1024. That seems like a reasonable default here. */ |
67 | static unsigned int nlm_max_connections = 1024; | |
68 | ||
1da177e4 LT |
69 | /* |
70 | * Constants needed for the sysctl interface. | |
71 | */ | |
72 | static const unsigned long nlm_grace_period_min = 0; | |
73 | static const unsigned long nlm_grace_period_max = 240; | |
74 | static const unsigned long nlm_timeout_min = 3; | |
75 | static const unsigned long nlm_timeout_max = 20; | |
76 | static const int nlm_port_min = 0, nlm_port_max = 65535; | |
77 | ||
90d5b180 | 78 | #ifdef CONFIG_SYSCTL |
1da177e4 | 79 | static struct ctl_table_header * nlm_sysctl_table; |
90d5b180 | 80 | #endif |
1da177e4 | 81 | |
9a8db97e | 82 | static unsigned long get_lockd_grace_period(void) |
1da177e4 | 83 | { |
1da177e4 LT |
84 | /* Note: nlm_timeout should always be nonzero */ |
85 | if (nlm_grace_period) | |
9a8db97e | 86 | return roundup(nlm_grace_period, nlm_timeout) * HZ; |
1da177e4 | 87 | else |
9a8db97e ME |
88 | return nlm_timeout * 5 * HZ; |
89 | } | |
90 | ||
08d44a35 | 91 | static void grace_ender(struct work_struct *grace) |
9a8db97e | 92 | { |
08d44a35 SK |
93 | struct delayed_work *dwork = container_of(grace, struct delayed_work, |
94 | work); | |
95 | struct lockd_net *ln = container_of(dwork, struct lockd_net, | |
96 | grace_period_end); | |
97 | ||
98 | locks_end_grace(&ln->lockd_manager); | |
1da177e4 LT |
99 | } |
100 | ||
5ccb0066 | 101 | static void set_grace_period(struct net *net) |
1da177e4 | 102 | { |
af558e33 | 103 | unsigned long grace_period = get_lockd_grace_period(); |
5ccb0066 | 104 | struct lockd_net *ln = net_generic(net, lockd_net_id); |
c8ab5f2a | 105 | |
5ccb0066 | 106 | locks_start_grace(net, &ln->lockd_manager); |
66547b02 SK |
107 | cancel_delayed_work_sync(&ln->grace_period_end); |
108 | schedule_delayed_work(&ln->grace_period_end, grace_period); | |
1da177e4 LT |
109 | } |
110 | ||
89996df4 BF |
111 | static void restart_grace(void) |
112 | { | |
113 | if (nlmsvc_ops) { | |
5ccb0066 SK |
114 | struct net *net = &init_net; |
115 | struct lockd_net *ln = net_generic(net, lockd_net_id); | |
66547b02 SK |
116 | |
117 | cancel_delayed_work_sync(&ln->grace_period_end); | |
08d44a35 | 118 | locks_end_grace(&ln->lockd_manager); |
89996df4 | 119 | nlmsvc_invalidate_all(); |
5ccb0066 | 120 | set_grace_period(net); |
89996df4 BF |
121 | } |
122 | } | |
123 | ||
1da177e4 LT |
124 | /* |
125 | * This is the lockd kernel thread | |
126 | */ | |
d751a7cd JL |
127 | static int |
128 | lockd(void *vrqstp) | |
1da177e4 | 129 | { |
5b444cc9 | 130 | int err = 0; |
d751a7cd | 131 | struct svc_rqst *rqstp = vrqstp; |
1da177e4 | 132 | |
d751a7cd | 133 | /* try_to_freeze() is called from svc_recv() */ |
83144186 | 134 | set_freezable(); |
1da177e4 | 135 | |
d751a7cd | 136 | /* Allow SIGKILL to tell lockd to drop all of its locks */ |
1da177e4 LT |
137 | allow_signal(SIGKILL); |
138 | ||
1da177e4 LT |
139 | dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n"); |
140 | ||
1da177e4 LT |
141 | /* |
142 | * The main request loop. We don't terminate until the last | |
d751a7cd | 143 | * NFS mount or NFS daemon has gone away. |
1da177e4 | 144 | */ |
d751a7cd | 145 | while (!kthread_should_stop()) { |
1da177e4 | 146 | long timeout = MAX_SCHEDULE_TIMEOUT; |
5216a8e7 | 147 | RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); |
1da177e4 | 148 | |
c72a476b JL |
149 | /* update sv_maxconn if it has changed */ |
150 | rqstp->rq_server->sv_maxconn = nlm_max_connections; | |
151 | ||
1da177e4 LT |
152 | if (signalled()) { |
153 | flush_signals(current); | |
89996df4 | 154 | restart_grace(); |
d751a7cd | 155 | continue; |
1da177e4 LT |
156 | } |
157 | ||
8fafa900 BF |
158 | timeout = nlmsvc_retry_blocked(); |
159 | ||
1da177e4 LT |
160 | /* |
161 | * Find a socket with data available and call its | |
162 | * recvfrom routine. | |
163 | */ | |
6fb2b47f | 164 | err = svc_recv(rqstp, timeout); |
5b444cc9 | 165 | if (err == -EAGAIN || err == -EINTR) |
1da177e4 | 166 | continue; |
ad06e4bd CL |
167 | dprintk("lockd: request from %s\n", |
168 | svc_print_addr(rqstp, buf, sizeof(buf))); | |
1da177e4 | 169 | |
6fb2b47f | 170 | svc_process(rqstp); |
1da177e4 | 171 | } |
2bd61579 | 172 | flush_signals(current); |
d751a7cd JL |
173 | if (nlmsvc_ops) |
174 | nlmsvc_invalidate_all(); | |
175 | nlm_shutdown_hosts(); | |
d751a7cd | 176 | return 0; |
1da177e4 LT |
177 | } |
178 | ||
eb16e907 | 179 | static int create_lockd_listener(struct svc_serv *serv, const char *name, |
c228fa20 SK |
180 | struct net *net, const int family, |
181 | const unsigned short port) | |
d3fe5ea7 CL |
182 | { |
183 | struct svc_xprt *xprt; | |
184 | ||
c228fa20 | 185 | xprt = svc_find_xprt(serv, name, net, family, 0); |
d3fe5ea7 | 186 | if (xprt == NULL) |
c228fa20 | 187 | return svc_create_xprt(serv, name, net, family, port, |
eb16e907 | 188 | SVC_SOCK_DEFAULTS); |
d3fe5ea7 CL |
189 | svc_xprt_put(xprt); |
190 | return 0; | |
191 | } | |
192 | ||
c228fa20 SK |
193 | static int create_lockd_family(struct svc_serv *serv, struct net *net, |
194 | const int family) | |
eb16e907 CL |
195 | { |
196 | int err; | |
197 | ||
c228fa20 | 198 | err = create_lockd_listener(serv, "udp", net, family, nlm_udpport); |
eb16e907 CL |
199 | if (err < 0) |
200 | return err; | |
201 | ||
c228fa20 | 202 | return create_lockd_listener(serv, "tcp", net, family, nlm_tcpport); |
eb16e907 CL |
203 | } |
204 | ||
482fb94e | 205 | /* |
8c3916f4 CL |
206 | * Ensure there are active UDP and TCP listeners for lockd. |
207 | * | |
208 | * Even if we have only TCP NFS mounts and/or TCP NFSDs, some | |
209 | * local services (such as rpc.statd) still require UDP, and | |
210 | * some NFS servers do not yet support NLM over TCP. | |
211 | * | |
212 | * Returns zero if all listeners are available; otherwise a | |
213 | * negative errno value is returned. | |
482fb94e | 214 | */ |
c228fa20 | 215 | static int make_socks(struct svc_serv *serv, struct net *net) |
24e36663 | 216 | { |
482fb94e | 217 | static int warned; |
0dba7c2a | 218 | int err; |
482fb94e | 219 | |
c228fa20 | 220 | err = create_lockd_family(serv, net, PF_INET); |
0dba7c2a CL |
221 | if (err < 0) |
222 | goto out_err; | |
223 | ||
c228fa20 | 224 | err = create_lockd_family(serv, net, PF_INET6); |
eb16e907 | 225 | if (err < 0 && err != -EAFNOSUPPORT) |
0dba7c2a CL |
226 | goto out_err; |
227 | ||
228 | warned = 0; | |
229 | return 0; | |
230 | ||
231 | out_err: | |
232 | if (warned++ == 0) | |
7dcf91ec | 233 | printk(KERN_WARNING |
0dba7c2a | 234 | "lockd_up: makesock failed, error=%d\n", err); |
679b033d | 235 | svc_shutdown_net(serv, net); |
24e36663 N |
236 | return err; |
237 | } | |
238 | ||
4db77695 | 239 | static int lockd_up_net(struct svc_serv *serv, struct net *net) |
bb2224df SK |
240 | { |
241 | struct lockd_net *ln = net_generic(net, lockd_net_id); | |
bb2224df SK |
242 | int error; |
243 | ||
786185b5 | 244 | if (ln->nlmsvc_users++) |
bb2224df SK |
245 | return 0; |
246 | ||
dbf9b5d7 | 247 | error = svc_bind(serv, net); |
bb2224df | 248 | if (error) |
dbf9b5d7 | 249 | goto err_bind; |
bb2224df SK |
250 | |
251 | error = make_socks(serv, net); | |
252 | if (error < 0) | |
7c17705e | 253 | goto err_bind; |
5630f7fa | 254 | set_grace_period(net); |
8dbf28e4 | 255 | dprintk("lockd_up_net: per-net data created; net=%p\n", net); |
bb2224df SK |
256 | return 0; |
257 | ||
dbf9b5d7 | 258 | err_bind: |
786185b5 | 259 | ln->nlmsvc_users--; |
bb2224df SK |
260 | return error; |
261 | } | |
262 | ||
4db77695 | 263 | static void lockd_down_net(struct svc_serv *serv, struct net *net) |
bb2224df SK |
264 | { |
265 | struct lockd_net *ln = net_generic(net, lockd_net_id); | |
bb2224df SK |
266 | |
267 | if (ln->nlmsvc_users) { | |
3b64739f SK |
268 | if (--ln->nlmsvc_users == 0) { |
269 | nlm_shutdown_hosts_net(net); | |
5630f7fa SK |
270 | cancel_delayed_work_sync(&ln->grace_period_end); |
271 | locks_end_grace(&ln->lockd_manager); | |
bb2224df | 272 | svc_shutdown_net(serv, net); |
8dbf28e4 | 273 | dprintk("lockd_down_net: per-net data destroyed; net=%p\n", net); |
3b64739f | 274 | } |
bb2224df SK |
275 | } else { |
276 | printk(KERN_ERR "lockd_down_net: no users! task=%p, net=%p\n", | |
277 | nlmsvc_task, net); | |
278 | BUG(); | |
279 | } | |
280 | } | |
281 | ||
3d1221df SK |
282 | static int lockd_start_svc(struct svc_serv *serv) |
283 | { | |
284 | int error; | |
285 | ||
286 | if (nlmsvc_rqst) | |
287 | return 0; | |
288 | ||
289 | /* | |
290 | * Create the kernel thread and wait for it to start. | |
291 | */ | |
292 | nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE); | |
293 | if (IS_ERR(nlmsvc_rqst)) { | |
294 | error = PTR_ERR(nlmsvc_rqst); | |
295 | printk(KERN_WARNING | |
296 | "lockd_up: svc_rqst allocation failed, error=%d\n", | |
297 | error); | |
298 | goto out_rqst; | |
299 | } | |
300 | ||
301 | svc_sock_update_bufs(serv); | |
302 | serv->sv_maxconn = nlm_max_connections; | |
303 | ||
d4e89902 | 304 | nlmsvc_task = kthread_create(lockd, nlmsvc_rqst, "%s", serv->sv_name); |
3d1221df SK |
305 | if (IS_ERR(nlmsvc_task)) { |
306 | error = PTR_ERR(nlmsvc_task); | |
307 | printk(KERN_WARNING | |
308 | "lockd_up: kthread_run failed, error=%d\n", error); | |
309 | goto out_task; | |
310 | } | |
d6a7ce42 | 311 | nlmsvc_rqst->rq_task = nlmsvc_task; |
d4e89902 | 312 | wake_up_process(nlmsvc_task); |
d6a7ce42 | 313 | |
3d1221df SK |
314 | dprintk("lockd_up: service started\n"); |
315 | return 0; | |
316 | ||
317 | out_task: | |
318 | svc_exit_thread(nlmsvc_rqst); | |
319 | nlmsvc_task = NULL; | |
320 | out_rqst: | |
321 | nlmsvc_rqst = NULL; | |
322 | return error; | |
323 | } | |
324 | ||
ea126e74 | 325 | static struct svc_serv_ops lockd_sv_ops = { |
b9e13cdf JL |
326 | .svo_shutdown = svc_rpcb_cleanup, |
327 | .svo_enqueue_xprt = svc_xprt_do_enqueue, | |
ea126e74 JL |
328 | }; |
329 | ||
24452239 | 330 | static struct svc_serv *lockd_create_svc(void) |
1da177e4 | 331 | { |
d751a7cd | 332 | struct svc_serv *serv; |
1da177e4 | 333 | |
1da177e4 LT |
334 | /* |
335 | * Check whether we're already up and running. | |
336 | */ | |
bb2224df | 337 | if (nlmsvc_rqst) { |
24452239 SK |
338 | /* |
339 | * Note: increase service usage, because later in case of error | |
340 | * svc_destroy() will be called. | |
341 | */ | |
342 | svc_get(nlmsvc_rqst->rq_server); | |
343 | return nlmsvc_rqst->rq_server; | |
bb2224df | 344 | } |
1da177e4 LT |
345 | |
346 | /* | |
347 | * Sanity check: if there's no pid, | |
348 | * we should be the first user ... | |
349 | */ | |
4a3ae42d | 350 | if (nlmsvc_users) |
1da177e4 LT |
351 | printk(KERN_WARNING |
352 | "lockd_up: no pid, %d users??\n", nlmsvc_users); | |
353 | ||
06bed7d1 TM |
354 | if (!nlm_timeout) |
355 | nlm_timeout = LOCKD_DFLT_TIMEO; | |
356 | nlmsvc_timeout = nlm_timeout * HZ; | |
357 | ||
ea126e74 | 358 | serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, &lockd_sv_ops); |
1da177e4 LT |
359 | if (!serv) { |
360 | printk(KERN_WARNING "lockd_up: create service failed\n"); | |
24452239 SK |
361 | return ERR_PTR(-ENOMEM); |
362 | } | |
8dbf28e4 | 363 | dprintk("lockd_up: service created\n"); |
24452239 SK |
364 | return serv; |
365 | } | |
366 | ||
367 | /* | |
368 | * Bring up the lockd process if it's not already up. | |
369 | */ | |
370 | int lockd_up(struct net *net) | |
371 | { | |
372 | struct svc_serv *serv; | |
7d13ec76 | 373 | int error; |
24452239 SK |
374 | |
375 | mutex_lock(&nlmsvc_mutex); | |
376 | ||
377 | serv = lockd_create_svc(); | |
378 | if (IS_ERR(serv)) { | |
379 | error = PTR_ERR(serv); | |
380 | goto err_create; | |
1da177e4 LT |
381 | } |
382 | ||
dbf9b5d7 | 383 | error = lockd_up_net(serv, net); |
8c3916f4 | 384 | if (error < 0) |
dbf9b5d7 | 385 | goto err_net; |
1da177e4 | 386 | |
3d1221df SK |
387 | error = lockd_start_svc(serv); |
388 | if (error < 0) | |
786185b5 | 389 | goto err_start; |
1da177e4 | 390 | |
7d13ec76 | 391 | nlmsvc_users++; |
1da177e4 LT |
392 | /* |
393 | * Note: svc_serv structures have an initial use count of 1, | |
394 | * so we exit through here on both success and failure. | |
395 | */ | |
dbf9b5d7 | 396 | err_net: |
1da177e4 | 397 | svc_destroy(serv); |
24452239 | 398 | err_create: |
353ab6e9 | 399 | mutex_unlock(&nlmsvc_mutex); |
1da177e4 | 400 | return error; |
786185b5 SK |
401 | |
402 | err_start: | |
4db77695 | 403 | lockd_down_net(serv, net); |
dbf9b5d7 | 404 | goto err_net; |
1da177e4 | 405 | } |
2de59872 | 406 | EXPORT_SYMBOL_GPL(lockd_up); |
1da177e4 LT |
407 | |
408 | /* | |
409 | * Decrement the user count and bring down lockd if we're the last. | |
410 | */ | |
411 | void | |
e3f70ead | 412 | lockd_down(struct net *net) |
1da177e4 | 413 | { |
353ab6e9 | 414 | mutex_lock(&nlmsvc_mutex); |
4db77695 | 415 | lockd_down_net(nlmsvc_rqst->rq_server, net); |
1da177e4 | 416 | if (nlmsvc_users) { |
786185b5 | 417 | if (--nlmsvc_users) |
1da177e4 | 418 | goto out; |
d751a7cd JL |
419 | } else { |
420 | printk(KERN_ERR "lockd_down: no users! task=%p\n", | |
421 | nlmsvc_task); | |
422 | BUG(); | |
1da177e4 | 423 | } |
1da177e4 | 424 | |
d751a7cd JL |
425 | if (!nlmsvc_task) { |
426 | printk(KERN_ERR "lockd_down: no lockd running.\n"); | |
427 | BUG(); | |
1da177e4 | 428 | } |
d751a7cd | 429 | kthread_stop(nlmsvc_task); |
8dbf28e4 | 430 | dprintk("lockd_down: service stopped\n"); |
abd1ec4e | 431 | svc_exit_thread(nlmsvc_rqst); |
8dbf28e4 | 432 | dprintk("lockd_down: service destroyed\n"); |
abd1ec4e JL |
433 | nlmsvc_task = NULL; |
434 | nlmsvc_rqst = NULL; | |
1da177e4 | 435 | out: |
353ab6e9 | 436 | mutex_unlock(&nlmsvc_mutex); |
1da177e4 | 437 | } |
2de59872 | 438 | EXPORT_SYMBOL_GPL(lockd_down); |
1da177e4 | 439 | |
90d5b180 CL |
440 | #ifdef CONFIG_SYSCTL |
441 | ||
1da177e4 LT |
442 | /* |
443 | * Sysctl parameters (same as module parameters, different interface). | |
444 | */ | |
445 | ||
7ac9fe57 | 446 | static struct ctl_table nlm_sysctls[] = { |
1da177e4 | 447 | { |
1da177e4 LT |
448 | .procname = "nlm_grace_period", |
449 | .data = &nlm_grace_period, | |
7ee91ec1 | 450 | .maxlen = sizeof(unsigned long), |
1da177e4 | 451 | .mode = 0644, |
6d456111 | 452 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
453 | .extra1 = (unsigned long *) &nlm_grace_period_min, |
454 | .extra2 = (unsigned long *) &nlm_grace_period_max, | |
455 | }, | |
456 | { | |
1da177e4 LT |
457 | .procname = "nlm_timeout", |
458 | .data = &nlm_timeout, | |
7ee91ec1 | 459 | .maxlen = sizeof(unsigned long), |
1da177e4 | 460 | .mode = 0644, |
6d456111 | 461 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
462 | .extra1 = (unsigned long *) &nlm_timeout_min, |
463 | .extra2 = (unsigned long *) &nlm_timeout_max, | |
464 | }, | |
465 | { | |
1da177e4 LT |
466 | .procname = "nlm_udpport", |
467 | .data = &nlm_udpport, | |
468 | .maxlen = sizeof(int), | |
469 | .mode = 0644, | |
6d456111 | 470 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
471 | .extra1 = (int *) &nlm_port_min, |
472 | .extra2 = (int *) &nlm_port_max, | |
473 | }, | |
474 | { | |
1da177e4 LT |
475 | .procname = "nlm_tcpport", |
476 | .data = &nlm_tcpport, | |
477 | .maxlen = sizeof(int), | |
478 | .mode = 0644, | |
6d456111 | 479 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
480 | .extra1 = (int *) &nlm_port_min, |
481 | .extra2 = (int *) &nlm_port_max, | |
482 | }, | |
abd1f500 | 483 | { |
abd1f500 OK |
484 | .procname = "nsm_use_hostnames", |
485 | .data = &nsm_use_hostnames, | |
486 | .maxlen = sizeof(int), | |
487 | .mode = 0644, | |
6d456111 | 488 | .proc_handler = proc_dointvec, |
abd1f500 | 489 | }, |
460f5cac | 490 | { |
460f5cac OK |
491 | .procname = "nsm_local_state", |
492 | .data = &nsm_local_state, | |
493 | .maxlen = sizeof(int), | |
494 | .mode = 0644, | |
6d456111 | 495 | .proc_handler = proc_dointvec, |
460f5cac | 496 | }, |
ab09203e | 497 | { } |
1da177e4 LT |
498 | }; |
499 | ||
7ac9fe57 | 500 | static struct ctl_table nlm_sysctl_dir[] = { |
1da177e4 | 501 | { |
1da177e4 LT |
502 | .procname = "nfs", |
503 | .mode = 0555, | |
504 | .child = nlm_sysctls, | |
505 | }, | |
ab09203e | 506 | { } |
1da177e4 LT |
507 | }; |
508 | ||
7ac9fe57 | 509 | static struct ctl_table nlm_sysctl_root[] = { |
1da177e4 | 510 | { |
1da177e4 LT |
511 | .procname = "fs", |
512 | .mode = 0555, | |
513 | .child = nlm_sysctl_dir, | |
514 | }, | |
ab09203e | 515 | { } |
1da177e4 LT |
516 | }; |
517 | ||
90d5b180 CL |
518 | #endif /* CONFIG_SYSCTL */ |
519 | ||
1da177e4 | 520 | /* |
405ae7d3 | 521 | * Module (and sysfs) parameters. |
1da177e4 LT |
522 | */ |
523 | ||
524 | #define param_set_min_max(name, type, which_strtol, min, max) \ | |
525 | static int param_set_##name(const char *val, struct kernel_param *kp) \ | |
526 | { \ | |
527 | char *endp; \ | |
528 | __typeof__(type) num = which_strtol(val, &endp, 0); \ | |
529 | if (endp == val || *endp || num < (min) || num > (max)) \ | |
530 | return -EINVAL; \ | |
de5b8e8e | 531 | *((type *) kp->arg) = num; \ |
1da177e4 LT |
532 | return 0; \ |
533 | } | |
534 | ||
535 | static inline int is_callback(u32 proc) | |
536 | { | |
537 | return proc == NLMPROC_GRANTED | |
538 | || proc == NLMPROC_GRANTED_MSG | |
539 | || proc == NLMPROC_TEST_RES | |
540 | || proc == NLMPROC_LOCK_RES | |
541 | || proc == NLMPROC_CANCEL_RES | |
542 | || proc == NLMPROC_UNLOCK_RES | |
543 | || proc == NLMPROC_NSM_NOTIFY; | |
544 | } | |
545 | ||
546 | ||
547 | static int lockd_authenticate(struct svc_rqst *rqstp) | |
548 | { | |
549 | rqstp->rq_client = NULL; | |
550 | switch (rqstp->rq_authop->flavour) { | |
551 | case RPC_AUTH_NULL: | |
552 | case RPC_AUTH_UNIX: | |
553 | if (rqstp->rq_proc == 0) | |
554 | return SVC_OK; | |
555 | if (is_callback(rqstp->rq_proc)) { | |
556 | /* Leave it to individual procedures to | |
557 | * call nlmsvc_lookup_host(rqstp) | |
558 | */ | |
559 | return SVC_OK; | |
560 | } | |
561 | return svc_set_client(rqstp); | |
562 | } | |
563 | return SVC_DENIED; | |
564 | } | |
565 | ||
566 | ||
567 | param_set_min_max(port, int, simple_strtol, 0, 65535) | |
568 | param_set_min_max(grace_period, unsigned long, simple_strtoul, | |
569 | nlm_grace_period_min, nlm_grace_period_max) | |
570 | param_set_min_max(timeout, unsigned long, simple_strtoul, | |
571 | nlm_timeout_min, nlm_timeout_max) | |
572 | ||
573 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
574 | MODULE_DESCRIPTION("NFS file locking service version " LOCKD_VERSION "."); | |
575 | MODULE_LICENSE("GPL"); | |
576 | ||
577 | module_param_call(nlm_grace_period, param_set_grace_period, param_get_ulong, | |
578 | &nlm_grace_period, 0644); | |
579 | module_param_call(nlm_timeout, param_set_timeout, param_get_ulong, | |
580 | &nlm_timeout, 0644); | |
581 | module_param_call(nlm_udpport, param_set_port, param_get_int, | |
582 | &nlm_udpport, 0644); | |
583 | module_param_call(nlm_tcpport, param_set_port, param_get_int, | |
584 | &nlm_tcpport, 0644); | |
abd1f500 | 585 | module_param(nsm_use_hostnames, bool, 0644); |
c72a476b | 586 | module_param(nlm_max_connections, uint, 0644); |
1da177e4 | 587 | |
a9c5d73a SK |
588 | static int lockd_init_net(struct net *net) |
589 | { | |
66547b02 SK |
590 | struct lockd_net *ln = net_generic(net, lockd_net_id); |
591 | ||
592 | INIT_DELAYED_WORK(&ln->grace_period_end, grace_ender); | |
f7790029 | 593 | INIT_LIST_HEAD(&ln->lockd_manager.list); |
c87fb4a3 | 594 | ln->lockd_manager.block_opens = false; |
0ad95472 | 595 | INIT_LIST_HEAD(&ln->nsm_handles); |
a9c5d73a SK |
596 | return 0; |
597 | } | |
598 | ||
599 | static void lockd_exit_net(struct net *net) | |
600 | { | |
601 | } | |
602 | ||
603 | static struct pernet_operations lockd_net_ops = { | |
604 | .init = lockd_init_net, | |
605 | .exit = lockd_exit_net, | |
606 | .id = &lockd_net_id, | |
607 | .size = sizeof(struct lockd_net), | |
608 | }; | |
609 | ||
610 | ||
1da177e4 LT |
611 | /* |
612 | * Initialising and terminating the module. | |
613 | */ | |
614 | ||
615 | static int __init init_nlm(void) | |
616 | { | |
a9c5d73a SK |
617 | int err; |
618 | ||
90d5b180 | 619 | #ifdef CONFIG_SYSCTL |
a9c5d73a | 620 | err = -ENOMEM; |
0b4d4147 | 621 | nlm_sysctl_table = register_sysctl_table(nlm_sysctl_root); |
a9c5d73a SK |
622 | if (nlm_sysctl_table == NULL) |
623 | goto err_sysctl; | |
624 | #endif | |
625 | err = register_pernet_subsys(&lockd_net_ops); | |
626 | if (err) | |
627 | goto err_pernet; | |
d68e3c4a JL |
628 | |
629 | err = lockd_create_procfs(); | |
630 | if (err) | |
631 | goto err_procfs; | |
632 | ||
90d5b180 | 633 | return 0; |
a9c5d73a | 634 | |
d68e3c4a JL |
635 | err_procfs: |
636 | unregister_pernet_subsys(&lockd_net_ops); | |
a9c5d73a SK |
637 | err_pernet: |
638 | #ifdef CONFIG_SYSCTL | |
639 | unregister_sysctl_table(nlm_sysctl_table); | |
a9c5d73a | 640 | err_sysctl: |
12dd7ecf | 641 | #endif |
a9c5d73a | 642 | return err; |
1da177e4 LT |
643 | } |
644 | ||
645 | static void __exit exit_nlm(void) | |
646 | { | |
647 | /* FIXME: delete all NLM clients */ | |
648 | nlm_shutdown_hosts(); | |
d68e3c4a | 649 | lockd_remove_procfs(); |
a9c5d73a | 650 | unregister_pernet_subsys(&lockd_net_ops); |
90d5b180 | 651 | #ifdef CONFIG_SYSCTL |
1da177e4 | 652 | unregister_sysctl_table(nlm_sysctl_table); |
90d5b180 | 653 | #endif |
1da177e4 LT |
654 | } |
655 | ||
656 | module_init(init_nlm); | |
657 | module_exit(exit_nlm); | |
658 | ||
659 | /* | |
660 | * Define NLM program and procedures | |
661 | */ | |
662 | static struct svc_version nlmsvc_version1 = { | |
663 | .vs_vers = 1, | |
664 | .vs_nproc = 17, | |
665 | .vs_proc = nlmsvc_procedures, | |
666 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
667 | }; | |
668 | static struct svc_version nlmsvc_version3 = { | |
669 | .vs_vers = 3, | |
670 | .vs_nproc = 24, | |
671 | .vs_proc = nlmsvc_procedures, | |
672 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
673 | }; | |
674 | #ifdef CONFIG_LOCKD_V4 | |
675 | static struct svc_version nlmsvc_version4 = { | |
676 | .vs_vers = 4, | |
677 | .vs_nproc = 24, | |
678 | .vs_proc = nlmsvc_procedures4, | |
679 | .vs_xdrsize = NLMSVC_XDRSIZE, | |
680 | }; | |
681 | #endif | |
682 | static struct svc_version * nlmsvc_version[] = { | |
683 | [1] = &nlmsvc_version1, | |
684 | [3] = &nlmsvc_version3, | |
685 | #ifdef CONFIG_LOCKD_V4 | |
686 | [4] = &nlmsvc_version4, | |
687 | #endif | |
688 | }; | |
689 | ||
690 | static struct svc_stat nlmsvc_stats; | |
691 | ||
e8c96f8c | 692 | #define NLM_NRVERS ARRAY_SIZE(nlmsvc_version) |
1da177e4 LT |
693 | static struct svc_program nlmsvc_program = { |
694 | .pg_prog = NLM_PROGRAM, /* program number */ | |
695 | .pg_nvers = NLM_NRVERS, /* number of entries in nlmsvc_version */ | |
696 | .pg_vers = nlmsvc_version, /* version table */ | |
697 | .pg_name = "lockd", /* service name */ | |
698 | .pg_class = "nfsd", /* share authentication with nfsd */ | |
699 | .pg_stats = &nlmsvc_stats, /* stats table */ | |
700 | .pg_authenticate = &lockd_authenticate /* export authentication */ | |
701 | }; |