This source file includes following definitions.
- nlm4svc_retrieve_args
- nlm4svc_proc_null
- __nlm4svc_proc_test
- nlm4svc_proc_test
- __nlm4svc_proc_lock
- nlm4svc_proc_lock
- __nlm4svc_proc_cancel
- nlm4svc_proc_cancel
- __nlm4svc_proc_unlock
- nlm4svc_proc_unlock
- __nlm4svc_proc_granted
- nlm4svc_proc_granted
- nlm4svc_callback_exit
- nlm4svc_callback_release
- nlm4svc_callback
- nlm4svc_proc_test_msg
- nlm4svc_proc_lock_msg
- nlm4svc_proc_cancel_msg
- nlm4svc_proc_unlock_msg
- nlm4svc_proc_granted_msg
- nlm4svc_proc_share
- nlm4svc_proc_unshare
- nlm4svc_proc_nm_lock
- nlm4svc_proc_free_all
- nlm4svc_proc_sm_notify
- nlm4svc_proc_granted_res
1
2
3
4
5
6
7
8
9
10
11 #include <linux/types.h>
12 #include <linux/time.h>
13 #include <linux/lockd/lockd.h>
14 #include <linux/lockd/share.h>
15 #include <linux/sunrpc/svc_xprt.h>
16
17 #define NLMDBG_FACILITY NLMDBG_CLIENT
18
19
20
21
22 static __be32
23 nlm4svc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp,
24 struct nlm_host **hostp, struct nlm_file **filp)
25 {
26 struct nlm_host *host = NULL;
27 struct nlm_file *file = NULL;
28 struct nlm_lock *lock = &argp->lock;
29 __be32 error = 0;
30
31
32 if (!nlmsvc_ops)
33 return nlm_lck_denied_nolocks;
34
35
36 if (!(host = nlmsvc_lookup_host(rqstp, lock->caller, lock->len))
37 || (argp->monitor && nsm_monitor(host) < 0))
38 goto no_locks;
39 *hostp = host;
40
41
42 if (filp != NULL) {
43 if ((error = nlm_lookup_file(rqstp, &file, &lock->fh)) != 0)
44 goto no_locks;
45 *filp = file;
46
47
48 lock->fl.fl_file = file->f_file;
49 lock->fl.fl_pid = current->tgid;
50 lock->fl.fl_lmops = &nlmsvc_lock_operations;
51 nlmsvc_locks_init_private(&lock->fl, host, (pid_t)lock->svid);
52 if (!lock->fl.fl_owner) {
53
54 nlmsvc_release_host(host);
55 return nlm_lck_denied_nolocks;
56 }
57 }
58
59 return 0;
60
61 no_locks:
62 nlmsvc_release_host(host);
63 if (error)
64 return error;
65 return nlm_lck_denied_nolocks;
66 }
67
68
69
70
71 static __be32
72 nlm4svc_proc_null(struct svc_rqst *rqstp)
73 {
74 dprintk("lockd: NULL called\n");
75 return rpc_success;
76 }
77
78
79
80
81 static __be32
82 __nlm4svc_proc_test(struct svc_rqst *rqstp, struct nlm_res *resp)
83 {
84 struct nlm_args *argp = rqstp->rq_argp;
85 struct nlm_host *host;
86 struct nlm_file *file;
87 __be32 rc = rpc_success;
88
89 dprintk("lockd: TEST4 called\n");
90 resp->cookie = argp->cookie;
91
92
93 if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
94 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
95
96
97 resp->status = nlmsvc_testlock(rqstp, file, host, &argp->lock, &resp->lock, &resp->cookie);
98 if (resp->status == nlm_drop_reply)
99 rc = rpc_drop_reply;
100 else
101 dprintk("lockd: TEST4 status %d\n", ntohl(resp->status));
102
103 nlmsvc_release_lockowner(&argp->lock);
104 nlmsvc_release_host(host);
105 nlm_release_file(file);
106 return rc;
107 }
108
109 static __be32
110 nlm4svc_proc_test(struct svc_rqst *rqstp)
111 {
112 return __nlm4svc_proc_test(rqstp, rqstp->rq_resp);
113 }
114
115 static __be32
116 __nlm4svc_proc_lock(struct svc_rqst *rqstp, struct nlm_res *resp)
117 {
118 struct nlm_args *argp = rqstp->rq_argp;
119 struct nlm_host *host;
120 struct nlm_file *file;
121 __be32 rc = rpc_success;
122
123 dprintk("lockd: LOCK called\n");
124
125 resp->cookie = argp->cookie;
126
127
128 if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
129 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
130
131 #if 0
132
133
134
135
136
137
138 if (host->h_nsmstate && host->h_nsmstate != argp->state) {
139 resp->status = nlm_lck_denied_nolocks;
140 } else
141 #endif
142
143
144 resp->status = nlmsvc_lock(rqstp, file, host, &argp->lock,
145 argp->block, &argp->cookie,
146 argp->reclaim);
147 if (resp->status == nlm_drop_reply)
148 rc = rpc_drop_reply;
149 else
150 dprintk("lockd: LOCK status %d\n", ntohl(resp->status));
151
152 nlmsvc_release_lockowner(&argp->lock);
153 nlmsvc_release_host(host);
154 nlm_release_file(file);
155 return rc;
156 }
157
158 static __be32
159 nlm4svc_proc_lock(struct svc_rqst *rqstp)
160 {
161 return __nlm4svc_proc_lock(rqstp, rqstp->rq_resp);
162 }
163
164 static __be32
165 __nlm4svc_proc_cancel(struct svc_rqst *rqstp, struct nlm_res *resp)
166 {
167 struct nlm_args *argp = rqstp->rq_argp;
168 struct nlm_host *host;
169 struct nlm_file *file;
170
171 dprintk("lockd: CANCEL called\n");
172
173 resp->cookie = argp->cookie;
174
175
176 if (locks_in_grace(SVC_NET(rqstp))) {
177 resp->status = nlm_lck_denied_grace_period;
178 return rpc_success;
179 }
180
181
182 if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
183 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
184
185
186 resp->status = nlmsvc_cancel_blocked(SVC_NET(rqstp), file, &argp->lock);
187
188 dprintk("lockd: CANCEL status %d\n", ntohl(resp->status));
189 nlmsvc_release_lockowner(&argp->lock);
190 nlmsvc_release_host(host);
191 nlm_release_file(file);
192 return rpc_success;
193 }
194
195 static __be32
196 nlm4svc_proc_cancel(struct svc_rqst *rqstp)
197 {
198 return __nlm4svc_proc_cancel(rqstp, rqstp->rq_resp);
199 }
200
201
202
203
204 static __be32
205 __nlm4svc_proc_unlock(struct svc_rqst *rqstp, struct nlm_res *resp)
206 {
207 struct nlm_args *argp = rqstp->rq_argp;
208 struct nlm_host *host;
209 struct nlm_file *file;
210
211 dprintk("lockd: UNLOCK called\n");
212
213 resp->cookie = argp->cookie;
214
215
216 if (locks_in_grace(SVC_NET(rqstp))) {
217 resp->status = nlm_lck_denied_grace_period;
218 return rpc_success;
219 }
220
221
222 if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
223 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
224
225
226 resp->status = nlmsvc_unlock(SVC_NET(rqstp), file, &argp->lock);
227
228 dprintk("lockd: UNLOCK status %d\n", ntohl(resp->status));
229 nlmsvc_release_lockowner(&argp->lock);
230 nlmsvc_release_host(host);
231 nlm_release_file(file);
232 return rpc_success;
233 }
234
235 static __be32
236 nlm4svc_proc_unlock(struct svc_rqst *rqstp)
237 {
238 return __nlm4svc_proc_unlock(rqstp, rqstp->rq_resp);
239 }
240
241
242
243
244
245 static __be32
246 __nlm4svc_proc_granted(struct svc_rqst *rqstp, struct nlm_res *resp)
247 {
248 struct nlm_args *argp = rqstp->rq_argp;
249
250 resp->cookie = argp->cookie;
251
252 dprintk("lockd: GRANTED called\n");
253 resp->status = nlmclnt_grant(svc_addr(rqstp), &argp->lock);
254 dprintk("lockd: GRANTED status %d\n", ntohl(resp->status));
255 return rpc_success;
256 }
257
258 static __be32
259 nlm4svc_proc_granted(struct svc_rqst *rqstp)
260 {
261 return __nlm4svc_proc_granted(rqstp, rqstp->rq_resp);
262 }
263
264
265
266
267 static void nlm4svc_callback_exit(struct rpc_task *task, void *data)
268 {
269 dprintk("lockd: %5u callback returned %d\n", task->tk_pid,
270 -task->tk_status);
271 }
272
273 static void nlm4svc_callback_release(void *data)
274 {
275 nlmsvc_release_call(data);
276 }
277
278 static const struct rpc_call_ops nlm4svc_callback_ops = {
279 .rpc_call_done = nlm4svc_callback_exit,
280 .rpc_release = nlm4svc_callback_release,
281 };
282
283
284
285
286
287
288 static __be32 nlm4svc_callback(struct svc_rqst *rqstp, u32 proc,
289 __be32 (*func)(struct svc_rqst *, struct nlm_res *))
290 {
291 struct nlm_args *argp = rqstp->rq_argp;
292 struct nlm_host *host;
293 struct nlm_rqst *call;
294 __be32 stat;
295
296 host = nlmsvc_lookup_host(rqstp,
297 argp->lock.caller,
298 argp->lock.len);
299 if (host == NULL)
300 return rpc_system_err;
301
302 call = nlm_alloc_call(host);
303 nlmsvc_release_host(host);
304 if (call == NULL)
305 return rpc_system_err;
306
307 stat = func(rqstp, &call->a_res);
308 if (stat != 0) {
309 nlmsvc_release_call(call);
310 return stat;
311 }
312
313 call->a_flags = RPC_TASK_ASYNC;
314 if (nlm_async_reply(call, proc, &nlm4svc_callback_ops) < 0)
315 return rpc_system_err;
316 return rpc_success;
317 }
318
319 static __be32 nlm4svc_proc_test_msg(struct svc_rqst *rqstp)
320 {
321 dprintk("lockd: TEST_MSG called\n");
322 return nlm4svc_callback(rqstp, NLMPROC_TEST_RES, __nlm4svc_proc_test);
323 }
324
325 static __be32 nlm4svc_proc_lock_msg(struct svc_rqst *rqstp)
326 {
327 dprintk("lockd: LOCK_MSG called\n");
328 return nlm4svc_callback(rqstp, NLMPROC_LOCK_RES, __nlm4svc_proc_lock);
329 }
330
331 static __be32 nlm4svc_proc_cancel_msg(struct svc_rqst *rqstp)
332 {
333 dprintk("lockd: CANCEL_MSG called\n");
334 return nlm4svc_callback(rqstp, NLMPROC_CANCEL_RES, __nlm4svc_proc_cancel);
335 }
336
337 static __be32 nlm4svc_proc_unlock_msg(struct svc_rqst *rqstp)
338 {
339 dprintk("lockd: UNLOCK_MSG called\n");
340 return nlm4svc_callback(rqstp, NLMPROC_UNLOCK_RES, __nlm4svc_proc_unlock);
341 }
342
343 static __be32 nlm4svc_proc_granted_msg(struct svc_rqst *rqstp)
344 {
345 dprintk("lockd: GRANTED_MSG called\n");
346 return nlm4svc_callback(rqstp, NLMPROC_GRANTED_RES, __nlm4svc_proc_granted);
347 }
348
349
350
351
352 static __be32
353 nlm4svc_proc_share(struct svc_rqst *rqstp)
354 {
355 struct nlm_args *argp = rqstp->rq_argp;
356 struct nlm_res *resp = rqstp->rq_resp;
357 struct nlm_host *host;
358 struct nlm_file *file;
359
360 dprintk("lockd: SHARE called\n");
361
362 resp->cookie = argp->cookie;
363
364
365 if (locks_in_grace(SVC_NET(rqstp)) && !argp->reclaim) {
366 resp->status = nlm_lck_denied_grace_period;
367 return rpc_success;
368 }
369
370
371 if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
372 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
373
374
375 resp->status = nlmsvc_share_file(host, file, argp);
376
377 dprintk("lockd: SHARE status %d\n", ntohl(resp->status));
378 nlmsvc_release_lockowner(&argp->lock);
379 nlmsvc_release_host(host);
380 nlm_release_file(file);
381 return rpc_success;
382 }
383
384
385
386
387 static __be32
388 nlm4svc_proc_unshare(struct svc_rqst *rqstp)
389 {
390 struct nlm_args *argp = rqstp->rq_argp;
391 struct nlm_res *resp = rqstp->rq_resp;
392 struct nlm_host *host;
393 struct nlm_file *file;
394
395 dprintk("lockd: UNSHARE called\n");
396
397 resp->cookie = argp->cookie;
398
399
400 if (locks_in_grace(SVC_NET(rqstp))) {
401 resp->status = nlm_lck_denied_grace_period;
402 return rpc_success;
403 }
404
405
406 if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
407 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
408
409
410 resp->status = nlmsvc_unshare_file(host, file, argp);
411
412 dprintk("lockd: UNSHARE status %d\n", ntohl(resp->status));
413 nlmsvc_release_lockowner(&argp->lock);
414 nlmsvc_release_host(host);
415 nlm_release_file(file);
416 return rpc_success;
417 }
418
419
420
421
422 static __be32
423 nlm4svc_proc_nm_lock(struct svc_rqst *rqstp)
424 {
425 struct nlm_args *argp = rqstp->rq_argp;
426
427 dprintk("lockd: NM_LOCK called\n");
428
429 argp->monitor = 0;
430 return nlm4svc_proc_lock(rqstp);
431 }
432
433
434
435
436 static __be32
437 nlm4svc_proc_free_all(struct svc_rqst *rqstp)
438 {
439 struct nlm_args *argp = rqstp->rq_argp;
440 struct nlm_host *host;
441
442
443 if (nlm4svc_retrieve_args(rqstp, argp, &host, NULL))
444 return rpc_success;
445
446 nlmsvc_free_host_resources(host);
447 nlmsvc_release_host(host);
448 return rpc_success;
449 }
450
451
452
453
454 static __be32
455 nlm4svc_proc_sm_notify(struct svc_rqst *rqstp)
456 {
457 struct nlm_reboot *argp = rqstp->rq_argp;
458
459 dprintk("lockd: SM_NOTIFY called\n");
460
461 if (!nlm_privileged_requester(rqstp)) {
462 char buf[RPC_MAX_ADDRBUFLEN];
463 printk(KERN_WARNING "lockd: rejected NSM callback from %s\n",
464 svc_print_addr(rqstp, buf, sizeof(buf)));
465 return rpc_system_err;
466 }
467
468 nlm_host_rebooted(SVC_NET(rqstp), argp);
469 return rpc_success;
470 }
471
472
473
474
475 static __be32
476 nlm4svc_proc_granted_res(struct svc_rqst *rqstp)
477 {
478 struct nlm_res *argp = rqstp->rq_argp;
479
480 if (!nlmsvc_ops)
481 return rpc_success;
482
483 dprintk("lockd: GRANTED_RES called\n");
484
485 nlmsvc_grant_reply(&argp->cookie, argp->status);
486 return rpc_success;
487 }
488
489
490
491
492
493
494 #define nlm4svc_encode_norep nlm4svc_encode_void
495 #define nlm4svc_decode_norep nlm4svc_decode_void
496 #define nlm4svc_decode_testres nlm4svc_decode_void
497 #define nlm4svc_decode_lockres nlm4svc_decode_void
498 #define nlm4svc_decode_unlockres nlm4svc_decode_void
499 #define nlm4svc_decode_cancelres nlm4svc_decode_void
500 #define nlm4svc_decode_grantedres nlm4svc_decode_void
501
502 #define nlm4svc_proc_none nlm4svc_proc_null
503 #define nlm4svc_proc_test_res nlm4svc_proc_null
504 #define nlm4svc_proc_lock_res nlm4svc_proc_null
505 #define nlm4svc_proc_cancel_res nlm4svc_proc_null
506 #define nlm4svc_proc_unlock_res nlm4svc_proc_null
507
508 struct nlm_void { int dummy; };
509
510 #define PROC(name, xargt, xrest, argt, rest, respsize) \
511 { .pc_func = nlm4svc_proc_##name, \
512 .pc_decode = nlm4svc_decode_##xargt, \
513 .pc_encode = nlm4svc_encode_##xrest, \
514 .pc_release = NULL, \
515 .pc_argsize = sizeof(struct nlm_##argt), \
516 .pc_ressize = sizeof(struct nlm_##rest), \
517 .pc_xdrressize = respsize, \
518 }
519 #define Ck (1+XDR_QUADLEN(NLM_MAXCOOKIELEN))
520 #define No (1+1024/4)
521 #define St 1
522 #define Rg 4
523 const struct svc_procedure nlmsvc_procedures4[] = {
524 PROC(null, void, void, void, void, 1),
525 PROC(test, testargs, testres, args, res, Ck+St+2+No+Rg),
526 PROC(lock, lockargs, res, args, res, Ck+St),
527 PROC(cancel, cancargs, res, args, res, Ck+St),
528 PROC(unlock, unlockargs, res, args, res, Ck+St),
529 PROC(granted, testargs, res, args, res, Ck+St),
530 PROC(test_msg, testargs, norep, args, void, 1),
531 PROC(lock_msg, lockargs, norep, args, void, 1),
532 PROC(cancel_msg, cancargs, norep, args, void, 1),
533 PROC(unlock_msg, unlockargs, norep, args, void, 1),
534 PROC(granted_msg, testargs, norep, args, void, 1),
535 PROC(test_res, testres, norep, res, void, 1),
536 PROC(lock_res, lockres, norep, res, void, 1),
537 PROC(cancel_res, cancelres, norep, res, void, 1),
538 PROC(unlock_res, unlockres, norep, res, void, 1),
539 PROC(granted_res, res, norep, res, void, 1),
540
541 PROC(sm_notify, reboot, void, reboot, void, 1),
542 PROC(none, void, void, void, void, 0),
543 PROC(none, void, void, void, void, 0),
544 PROC(none, void, void, void, void, 0),
545 PROC(share, shareargs, shareres, args, res, Ck+St+1),
546 PROC(unshare, shareargs, shareres, args, res, Ck+St+1),
547 PROC(nm_lock, lockargs, res, args, res, Ck+St),
548 PROC(free_all, notify, void, args, void, 1),
549
550 };