1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * linux/fs/lockd/svcproc.c
4 *
5 * Lockd server procedures. We don't implement the NLM_*_RES
6 * procedures because we don't use the async procedures.
7 *
8 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
9 */
10
11 #include <linux/types.h>
12 #include <linux/time.h>
13 #include <linux/sunrpc/svc_xprt.h>
14
15 #include "lockd.h"
16 #include "share.h"
17
18 #define NLMDBG_FACILITY NLMDBG_CLIENT
19
20 #ifdef CONFIG_LOCKD_V4
cast_status(__be32 status)21 static inline __be32 cast_status(__be32 status)
22 {
23 switch (status) {
24 case nlm_granted:
25 case nlm_lck_denied:
26 case nlm_lck_denied_nolocks:
27 case nlm_lck_blocked:
28 case nlm_lck_denied_grace_period:
29 case nlm__int__drop_reply:
30 break;
31 case nlm__int__deadlock:
32 status = nlm_lck_denied;
33 break;
34 default:
35 status = nlm_lck_denied_nolocks;
36 }
37
38 return status;
39 }
40 #else
cast_status(__be32 status)41 static inline __be32 cast_status(__be32 status)
42 {
43 switch (status) {
44 case nlm__int__deadlock:
45 status = nlm_lck_denied;
46 break;
47 case nlm__int__stale_fh:
48 case nlm__int__failed:
49 status = nlm_lck_denied_nolocks;
50 break;
51 default:
52 if (be32_to_cpu(status) >= 30000)
53 pr_warn_once("lockd: unhandled internal status %u\n",
54 be32_to_cpu(status));
55 break;
56 }
57 return status;
58 }
59 #endif
60
61 /*
62 * Obtain client and file from arguments
63 */
64 static __be32
nlmsvc_retrieve_args(struct svc_rqst * rqstp,struct nlm_args * argp,struct nlm_host ** hostp,struct nlm_file ** filp)65 nlmsvc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp,
66 struct nlm_host **hostp, struct nlm_file **filp)
67 {
68 struct nlm_host *host = NULL;
69 struct nlm_file *file = NULL;
70 struct nlm_lock *lock = &argp->lock;
71 bool is_test = (rqstp->rq_proc == NLMPROC_TEST ||
72 rqstp->rq_proc == NLMPROC_TEST_MSG);
73 int mode;
74 __be32 error = 0;
75
76 /* nfsd callbacks must have been installed for this procedure */
77 if (!nlmsvc_ops)
78 return nlm_lck_denied_nolocks;
79
80 /* Obtain host handle */
81 if (!(host = nlmsvc_lookup_host(rqstp, lock->caller, lock->len))
82 || (argp->monitor && nsm_monitor(host) < 0))
83 goto no_locks;
84 *hostp = host;
85
86 /* Obtain file pointer. Not used by FREE_ALL call. */
87 if (filp != NULL) {
88 mode = lock_to_openmode(&lock->fl);
89
90 if (is_test)
91 mode = O_RDWR;
92
93 error = cast_status(nlm_lookup_file(rqstp, &file, lock, mode));
94 if (error != 0)
95 goto no_locks;
96 *filp = file;
97
98 /* Set up the missing parts of the file_lock structure */
99 lock->fl.c.flc_flags = FL_POSIX;
100 if (is_test)
101 lock->fl.c.flc_file = nlmsvc_file_file(file);
102 else
103 lock->fl.c.flc_file = file->f_file[mode];
104 lock->fl.c.flc_pid = current->tgid;
105 lock->fl.fl_lmops = &nlmsvc_lock_operations;
106 nlmsvc_locks_init_private(&lock->fl, host, (pid_t)lock->svid);
107 if (!lock->fl.c.flc_owner) {
108 /* lockowner allocation has failed */
109 nlmsvc_release_host(host);
110 return nlm_lck_denied_nolocks;
111 }
112 }
113
114 return 0;
115
116 no_locks:
117 nlmsvc_release_host(host);
118 if (error)
119 return error;
120 return nlm_lck_denied_nolocks;
121 }
122
123 /*
124 * NULL: Test for presence of service
125 */
126 static __be32
nlmsvc_proc_null(struct svc_rqst * rqstp)127 nlmsvc_proc_null(struct svc_rqst *rqstp)
128 {
129 dprintk("lockd: NULL called\n");
130 return rpc_success;
131 }
132
133 /*
134 * TEST: Check for conflicting lock
135 */
136 static __be32
__nlmsvc_proc_test(struct svc_rqst * rqstp,struct nlm_res * resp)137 __nlmsvc_proc_test(struct svc_rqst *rqstp, struct nlm_res *resp)
138 {
139 struct nlm_args *argp = rqstp->rq_argp;
140 struct nlm_host *host;
141 struct nlm_file *file;
142 __be32 rc = rpc_success;
143
144 dprintk("lockd: TEST called\n");
145 resp->cookie = argp->cookie;
146
147 /* Obtain client and file */
148 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
149 return resp->status == nlm__int__drop_reply ?
150 rpc_drop_reply : rpc_success;
151
152 /* Now check for conflicting locks */
153 resp->status = cast_status(nlmsvc_testlock(rqstp, file, host,
154 &argp->lock, &resp->lock));
155 if (resp->status == nlm__int__drop_reply)
156 rc = rpc_drop_reply;
157 else
158 dprintk("lockd: TEST status %d vers %d\n",
159 ntohl(resp->status), rqstp->rq_vers);
160
161 nlmsvc_release_lockowner(&argp->lock);
162 nlmsvc_release_host(host);
163 nlm_release_file(file);
164 return rc;
165 }
166
167 static __be32
nlmsvc_proc_test(struct svc_rqst * rqstp)168 nlmsvc_proc_test(struct svc_rqst *rqstp)
169 {
170 return __nlmsvc_proc_test(rqstp, rqstp->rq_resp);
171 }
172
173 static __be32
__nlmsvc_proc_lock(struct svc_rqst * rqstp,struct nlm_res * resp)174 __nlmsvc_proc_lock(struct svc_rqst *rqstp, struct nlm_res *resp)
175 {
176 struct nlm_args *argp = rqstp->rq_argp;
177 struct nlm_host *host;
178 struct nlm_file *file;
179 __be32 rc = rpc_success;
180
181 dprintk("lockd: LOCK called\n");
182
183 resp->cookie = argp->cookie;
184
185 /* Obtain client and file */
186 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
187 return resp->status == nlm__int__drop_reply ?
188 rpc_drop_reply : rpc_success;
189
190 /* Now try to lock the file */
191 resp->status = cast_status(nlmsvc_lock(rqstp, file, host, &argp->lock,
192 argp->block, &argp->cookie,
193 argp->reclaim));
194 if (resp->status == nlm__int__drop_reply)
195 rc = rpc_drop_reply;
196 else
197 dprintk("lockd: LOCK status %d\n", ntohl(resp->status));
198
199 nlmsvc_release_lockowner(&argp->lock);
200 nlmsvc_release_host(host);
201 nlm_release_file(file);
202 return rc;
203 }
204
205 static __be32
nlmsvc_proc_lock(struct svc_rqst * rqstp)206 nlmsvc_proc_lock(struct svc_rqst *rqstp)
207 {
208 return __nlmsvc_proc_lock(rqstp, rqstp->rq_resp);
209 }
210
211 static __be32
__nlmsvc_proc_cancel(struct svc_rqst * rqstp,struct nlm_res * resp)212 __nlmsvc_proc_cancel(struct svc_rqst *rqstp, struct nlm_res *resp)
213 {
214 struct nlm_args *argp = rqstp->rq_argp;
215 struct nlm_host *host;
216 struct nlm_file *file;
217 struct net *net = SVC_NET(rqstp);
218
219 dprintk("lockd: CANCEL called\n");
220
221 resp->cookie = argp->cookie;
222
223 /* Don't accept requests during grace period */
224 if (locks_in_grace(net)) {
225 resp->status = nlm_lck_denied_grace_period;
226 return rpc_success;
227 }
228
229 /* Obtain client and file */
230 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
231 return resp->status == nlm__int__drop_reply ?
232 rpc_drop_reply : rpc_success;
233
234 /* Try to cancel request. */
235 resp->status = cast_status(nlmsvc_cancel_blocked(net, file, &argp->lock));
236
237 dprintk("lockd: CANCEL status %d\n", ntohl(resp->status));
238 nlmsvc_release_lockowner(&argp->lock);
239 nlmsvc_release_host(host);
240 nlm_release_file(file);
241 return rpc_success;
242 }
243
244 static __be32
nlmsvc_proc_cancel(struct svc_rqst * rqstp)245 nlmsvc_proc_cancel(struct svc_rqst *rqstp)
246 {
247 return __nlmsvc_proc_cancel(rqstp, rqstp->rq_resp);
248 }
249
250 /*
251 * UNLOCK: release a lock
252 */
253 static __be32
__nlmsvc_proc_unlock(struct svc_rqst * rqstp,struct nlm_res * resp)254 __nlmsvc_proc_unlock(struct svc_rqst *rqstp, struct nlm_res *resp)
255 {
256 struct nlm_args *argp = rqstp->rq_argp;
257 struct nlm_host *host;
258 struct nlm_file *file;
259 struct net *net = SVC_NET(rqstp);
260
261 dprintk("lockd: UNLOCK called\n");
262
263 resp->cookie = argp->cookie;
264
265 /* Don't accept new lock requests during grace period */
266 if (locks_in_grace(net)) {
267 resp->status = nlm_lck_denied_grace_period;
268 return rpc_success;
269 }
270
271 /* Obtain client and file */
272 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
273 return resp->status == nlm__int__drop_reply ?
274 rpc_drop_reply : rpc_success;
275
276 /* Now try to remove the lock */
277 resp->status = cast_status(nlmsvc_unlock(net, file, &argp->lock));
278
279 dprintk("lockd: UNLOCK status %d\n", ntohl(resp->status));
280 nlmsvc_release_lockowner(&argp->lock);
281 nlmsvc_release_host(host);
282 nlm_release_file(file);
283 return rpc_success;
284 }
285
286 static __be32
nlmsvc_proc_unlock(struct svc_rqst * rqstp)287 nlmsvc_proc_unlock(struct svc_rqst *rqstp)
288 {
289 return __nlmsvc_proc_unlock(rqstp, rqstp->rq_resp);
290 }
291
292 /*
293 * GRANTED: A server calls us to tell that a process' lock request
294 * was granted
295 */
296 static __be32
__nlmsvc_proc_granted(struct svc_rqst * rqstp,struct nlm_res * resp)297 __nlmsvc_proc_granted(struct svc_rqst *rqstp, struct nlm_res *resp)
298 {
299 struct nlm_args *argp = rqstp->rq_argp;
300
301 resp->cookie = argp->cookie;
302
303 dprintk("lockd: GRANTED called\n");
304 resp->status = nlmclnt_grant(svc_addr(rqstp), &argp->lock);
305 dprintk("lockd: GRANTED status %d\n", ntohl(resp->status));
306 return rpc_success;
307 }
308
309 static __be32
nlmsvc_proc_granted(struct svc_rqst * rqstp)310 nlmsvc_proc_granted(struct svc_rqst *rqstp)
311 {
312 return __nlmsvc_proc_granted(rqstp, rqstp->rq_resp);
313 }
314
315 /*
316 * This is the generic lockd callback for async RPC calls
317 */
nlmsvc_callback_exit(struct rpc_task * task,void * data)318 static void nlmsvc_callback_exit(struct rpc_task *task, void *data)
319 {
320 }
321
nlmsvc_release_call(struct nlm_rqst * call)322 void nlmsvc_release_call(struct nlm_rqst *call)
323 {
324 if (!refcount_dec_and_test(&call->a_count))
325 return;
326 nlmsvc_release_host(call->a_host);
327 kfree(call);
328 }
329
nlmsvc_callback_release(void * data)330 static void nlmsvc_callback_release(void *data)
331 {
332 nlmsvc_release_call(data);
333 }
334
335 static const struct rpc_call_ops nlmsvc_callback_ops = {
336 .rpc_call_done = nlmsvc_callback_exit,
337 .rpc_release = nlmsvc_callback_release,
338 };
339
340 /*
341 * `Async' versions of the above service routines. They aren't really,
342 * because we send the callback before the reply proper. I hope this
343 * doesn't break any clients.
344 */
nlmsvc_callback(struct svc_rqst * rqstp,u32 proc,__be32 (* func)(struct svc_rqst *,struct nlm_res *))345 static __be32 nlmsvc_callback(struct svc_rqst *rqstp, u32 proc,
346 __be32 (*func)(struct svc_rqst *, struct nlm_res *))
347 {
348 struct nlm_args *argp = rqstp->rq_argp;
349 struct nlm_host *host;
350 struct nlm_rqst *call;
351 __be32 stat;
352
353 host = nlmsvc_lookup_host(rqstp,
354 argp->lock.caller,
355 argp->lock.len);
356 if (host == NULL)
357 return rpc_system_err;
358
359 call = nlm_alloc_call(host);
360 nlmsvc_release_host(host);
361 if (call == NULL)
362 return rpc_system_err;
363
364 stat = func(rqstp, &call->a_res);
365 if (stat != 0) {
366 nlmsvc_release_call(call);
367 return stat;
368 }
369
370 call->a_flags = RPC_TASK_ASYNC;
371 if (nlm_async_reply(call, proc, &nlmsvc_callback_ops) < 0)
372 return rpc_system_err;
373 return rpc_success;
374 }
375
nlmsvc_proc_test_msg(struct svc_rqst * rqstp)376 static __be32 nlmsvc_proc_test_msg(struct svc_rqst *rqstp)
377 {
378 dprintk("lockd: TEST_MSG called\n");
379 return nlmsvc_callback(rqstp, NLMPROC_TEST_RES, __nlmsvc_proc_test);
380 }
381
nlmsvc_proc_lock_msg(struct svc_rqst * rqstp)382 static __be32 nlmsvc_proc_lock_msg(struct svc_rqst *rqstp)
383 {
384 dprintk("lockd: LOCK_MSG called\n");
385 return nlmsvc_callback(rqstp, NLMPROC_LOCK_RES, __nlmsvc_proc_lock);
386 }
387
nlmsvc_proc_cancel_msg(struct svc_rqst * rqstp)388 static __be32 nlmsvc_proc_cancel_msg(struct svc_rqst *rqstp)
389 {
390 dprintk("lockd: CANCEL_MSG called\n");
391 return nlmsvc_callback(rqstp, NLMPROC_CANCEL_RES, __nlmsvc_proc_cancel);
392 }
393
394 static __be32
nlmsvc_proc_unlock_msg(struct svc_rqst * rqstp)395 nlmsvc_proc_unlock_msg(struct svc_rqst *rqstp)
396 {
397 dprintk("lockd: UNLOCK_MSG called\n");
398 return nlmsvc_callback(rqstp, NLMPROC_UNLOCK_RES, __nlmsvc_proc_unlock);
399 }
400
401 static __be32
nlmsvc_proc_granted_msg(struct svc_rqst * rqstp)402 nlmsvc_proc_granted_msg(struct svc_rqst *rqstp)
403 {
404 dprintk("lockd: GRANTED_MSG called\n");
405 return nlmsvc_callback(rqstp, NLMPROC_GRANTED_RES, __nlmsvc_proc_granted);
406 }
407
408 /*
409 * SHARE: create a DOS share or alter existing share.
410 */
411 static __be32
nlmsvc_proc_share(struct svc_rqst * rqstp)412 nlmsvc_proc_share(struct svc_rqst *rqstp)
413 {
414 struct nlm_args *argp = rqstp->rq_argp;
415 struct nlm_res *resp = rqstp->rq_resp;
416 struct nlm_host *host;
417 struct nlm_file *file;
418
419 dprintk("lockd: SHARE called\n");
420
421 resp->cookie = argp->cookie;
422
423 /* Don't accept new lock requests during grace period */
424 if (locks_in_grace(SVC_NET(rqstp)) && !argp->reclaim) {
425 resp->status = nlm_lck_denied_grace_period;
426 return rpc_success;
427 }
428
429 /* Obtain client and file */
430 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
431 return resp->status == nlm__int__drop_reply ?
432 rpc_drop_reply : rpc_success;
433
434 /* Now try to create the share */
435 resp->status = cast_status(nlmsvc_share_file(host, file, &argp->lock.oh,
436 argp->fsm_access,
437 argp->fsm_mode));
438
439 dprintk("lockd: SHARE status %d\n", ntohl(resp->status));
440 nlmsvc_release_lockowner(&argp->lock);
441 nlmsvc_release_host(host);
442 nlm_release_file(file);
443 return rpc_success;
444 }
445
446 /*
447 * UNSHARE: Release a DOS share.
448 */
449 static __be32
nlmsvc_proc_unshare(struct svc_rqst * rqstp)450 nlmsvc_proc_unshare(struct svc_rqst *rqstp)
451 {
452 struct nlm_args *argp = rqstp->rq_argp;
453 struct nlm_res *resp = rqstp->rq_resp;
454 struct nlm_host *host;
455 struct nlm_file *file;
456
457 dprintk("lockd: UNSHARE called\n");
458
459 resp->cookie = argp->cookie;
460
461 /* Don't accept requests during grace period */
462 if (locks_in_grace(SVC_NET(rqstp))) {
463 resp->status = nlm_lck_denied_grace_period;
464 return rpc_success;
465 }
466
467 /* Obtain client and file */
468 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
469 return resp->status == nlm__int__drop_reply ?
470 rpc_drop_reply : rpc_success;
471
472 /* Now try to unshare the file */
473 resp->status = cast_status(nlmsvc_unshare_file(host, file,
474 &argp->lock.oh));
475
476 dprintk("lockd: UNSHARE status %d\n", ntohl(resp->status));
477 nlmsvc_release_lockowner(&argp->lock);
478 nlmsvc_release_host(host);
479 nlm_release_file(file);
480 return rpc_success;
481 }
482
483 /*
484 * NM_LOCK: Create an unmonitored lock
485 */
486 static __be32
nlmsvc_proc_nm_lock(struct svc_rqst * rqstp)487 nlmsvc_proc_nm_lock(struct svc_rqst *rqstp)
488 {
489 struct nlm_args *argp = rqstp->rq_argp;
490
491 dprintk("lockd: NM_LOCK called\n");
492
493 argp->monitor = 0; /* just clean the monitor flag */
494 return nlmsvc_proc_lock(rqstp);
495 }
496
497 /*
498 * FREE_ALL: Release all locks and shares held by client
499 */
500 static __be32
nlmsvc_proc_free_all(struct svc_rqst * rqstp)501 nlmsvc_proc_free_all(struct svc_rqst *rqstp)
502 {
503 struct nlm_args *argp = rqstp->rq_argp;
504 struct nlm_host *host;
505
506 /* Obtain client */
507 if (nlmsvc_retrieve_args(rqstp, argp, &host, NULL))
508 return rpc_success;
509
510 nlmsvc_free_host_resources(host);
511 nlmsvc_release_host(host);
512 return rpc_success;
513 }
514
515 /*
516 * SM_NOTIFY: private callback from statd (not part of official NLM proto)
517 */
518 static __be32
nlmsvc_proc_sm_notify(struct svc_rqst * rqstp)519 nlmsvc_proc_sm_notify(struct svc_rqst *rqstp)
520 {
521 struct nlm_reboot *argp = rqstp->rq_argp;
522
523 dprintk("lockd: SM_NOTIFY called\n");
524
525 if (!nlm_privileged_requester(rqstp)) {
526 char buf[RPC_MAX_ADDRBUFLEN];
527 printk(KERN_WARNING "lockd: rejected NSM callback from %s\n",
528 svc_print_addr(rqstp, buf, sizeof(buf)));
529 return rpc_system_err;
530 }
531
532 nlm_host_rebooted(SVC_NET(rqstp), argp);
533 return rpc_success;
534 }
535
536 /*
537 * client sent a GRANTED_RES, let's remove the associated block
538 */
539 static __be32
nlmsvc_proc_granted_res(struct svc_rqst * rqstp)540 nlmsvc_proc_granted_res(struct svc_rqst *rqstp)
541 {
542 struct nlm_res *argp = rqstp->rq_argp;
543
544 if (!nlmsvc_ops)
545 return rpc_success;
546
547 dprintk("lockd: GRANTED_RES called\n");
548
549 nlmsvc_grant_reply(&argp->cookie, argp->status);
550 return rpc_success;
551 }
552
553 static __be32
nlmsvc_proc_unused(struct svc_rqst * rqstp)554 nlmsvc_proc_unused(struct svc_rqst *rqstp)
555 {
556 return rpc_proc_unavail;
557 }
558
559 /*
560 * NLM Server procedures.
561 */
562
563 struct nlm_void { int dummy; };
564
565 #define Ck (1+XDR_QUADLEN(NLM_MAXCOOKIELEN)) /* cookie */
566 #define St 1 /* status */
567 #define No (1+1024/4) /* Net Obj */
568 #define Rg 2 /* range - offset + size */
569
570 static const struct svc_procedure nlmsvc_procedures[24] = {
571 [NLMPROC_NULL] = {
572 .pc_func = nlmsvc_proc_null,
573 .pc_decode = nlmsvc_decode_void,
574 .pc_encode = nlmsvc_encode_void,
575 .pc_argsize = sizeof(struct nlm_void),
576 .pc_argzero = sizeof(struct nlm_void),
577 .pc_ressize = sizeof(struct nlm_void),
578 .pc_xdrressize = St,
579 .pc_name = "NULL",
580 },
581 [NLMPROC_TEST] = {
582 .pc_func = nlmsvc_proc_test,
583 .pc_decode = nlmsvc_decode_testargs,
584 .pc_encode = nlmsvc_encode_testres,
585 .pc_argsize = sizeof(struct nlm_args),
586 .pc_argzero = sizeof(struct nlm_args),
587 .pc_ressize = sizeof(struct nlm_res),
588 .pc_xdrressize = Ck+St+2+No+Rg,
589 .pc_name = "TEST",
590 },
591 [NLMPROC_LOCK] = {
592 .pc_func = nlmsvc_proc_lock,
593 .pc_decode = nlmsvc_decode_lockargs,
594 .pc_encode = nlmsvc_encode_res,
595 .pc_argsize = sizeof(struct nlm_args),
596 .pc_argzero = sizeof(struct nlm_args),
597 .pc_ressize = sizeof(struct nlm_res),
598 .pc_xdrressize = Ck+St,
599 .pc_name = "LOCK",
600 },
601 [NLMPROC_CANCEL] = {
602 .pc_func = nlmsvc_proc_cancel,
603 .pc_decode = nlmsvc_decode_cancargs,
604 .pc_encode = nlmsvc_encode_res,
605 .pc_argsize = sizeof(struct nlm_args),
606 .pc_argzero = sizeof(struct nlm_args),
607 .pc_ressize = sizeof(struct nlm_res),
608 .pc_xdrressize = Ck+St,
609 .pc_name = "CANCEL",
610 },
611 [NLMPROC_UNLOCK] = {
612 .pc_func = nlmsvc_proc_unlock,
613 .pc_decode = nlmsvc_decode_unlockargs,
614 .pc_encode = nlmsvc_encode_res,
615 .pc_argsize = sizeof(struct nlm_args),
616 .pc_argzero = sizeof(struct nlm_args),
617 .pc_ressize = sizeof(struct nlm_res),
618 .pc_xdrressize = Ck+St,
619 .pc_name = "UNLOCK",
620 },
621 [NLMPROC_GRANTED] = {
622 .pc_func = nlmsvc_proc_granted,
623 .pc_decode = nlmsvc_decode_testargs,
624 .pc_encode = nlmsvc_encode_res,
625 .pc_argsize = sizeof(struct nlm_args),
626 .pc_argzero = sizeof(struct nlm_args),
627 .pc_ressize = sizeof(struct nlm_res),
628 .pc_xdrressize = Ck+St,
629 .pc_name = "GRANTED",
630 },
631 [NLMPROC_TEST_MSG] = {
632 .pc_func = nlmsvc_proc_test_msg,
633 .pc_decode = nlmsvc_decode_testargs,
634 .pc_encode = nlmsvc_encode_void,
635 .pc_argsize = sizeof(struct nlm_args),
636 .pc_argzero = sizeof(struct nlm_args),
637 .pc_ressize = sizeof(struct nlm_void),
638 .pc_xdrressize = St,
639 .pc_name = "TEST_MSG",
640 },
641 [NLMPROC_LOCK_MSG] = {
642 .pc_func = nlmsvc_proc_lock_msg,
643 .pc_decode = nlmsvc_decode_lockargs,
644 .pc_encode = nlmsvc_encode_void,
645 .pc_argsize = sizeof(struct nlm_args),
646 .pc_argzero = sizeof(struct nlm_args),
647 .pc_ressize = sizeof(struct nlm_void),
648 .pc_xdrressize = St,
649 .pc_name = "LOCK_MSG",
650 },
651 [NLMPROC_CANCEL_MSG] = {
652 .pc_func = nlmsvc_proc_cancel_msg,
653 .pc_decode = nlmsvc_decode_cancargs,
654 .pc_encode = nlmsvc_encode_void,
655 .pc_argsize = sizeof(struct nlm_args),
656 .pc_argzero = sizeof(struct nlm_args),
657 .pc_ressize = sizeof(struct nlm_void),
658 .pc_xdrressize = St,
659 .pc_name = "CANCEL_MSG",
660 },
661 [NLMPROC_UNLOCK_MSG] = {
662 .pc_func = nlmsvc_proc_unlock_msg,
663 .pc_decode = nlmsvc_decode_unlockargs,
664 .pc_encode = nlmsvc_encode_void,
665 .pc_argsize = sizeof(struct nlm_args),
666 .pc_argzero = sizeof(struct nlm_args),
667 .pc_ressize = sizeof(struct nlm_void),
668 .pc_xdrressize = St,
669 .pc_name = "UNLOCK_MSG",
670 },
671 [NLMPROC_GRANTED_MSG] = {
672 .pc_func = nlmsvc_proc_granted_msg,
673 .pc_decode = nlmsvc_decode_testargs,
674 .pc_encode = nlmsvc_encode_void,
675 .pc_argsize = sizeof(struct nlm_args),
676 .pc_argzero = sizeof(struct nlm_args),
677 .pc_ressize = sizeof(struct nlm_void),
678 .pc_xdrressize = St,
679 .pc_name = "GRANTED_MSG",
680 },
681 [NLMPROC_TEST_RES] = {
682 .pc_func = nlmsvc_proc_null,
683 .pc_decode = nlmsvc_decode_void,
684 .pc_encode = nlmsvc_encode_void,
685 .pc_argsize = sizeof(struct nlm_res),
686 .pc_argzero = sizeof(struct nlm_res),
687 .pc_ressize = sizeof(struct nlm_void),
688 .pc_xdrressize = St,
689 .pc_name = "TEST_RES",
690 },
691 [NLMPROC_LOCK_RES] = {
692 .pc_func = nlmsvc_proc_null,
693 .pc_decode = nlmsvc_decode_void,
694 .pc_encode = nlmsvc_encode_void,
695 .pc_argsize = sizeof(struct nlm_res),
696 .pc_argzero = sizeof(struct nlm_res),
697 .pc_ressize = sizeof(struct nlm_void),
698 .pc_xdrressize = St,
699 .pc_name = "LOCK_RES",
700 },
701 [NLMPROC_CANCEL_RES] = {
702 .pc_func = nlmsvc_proc_null,
703 .pc_decode = nlmsvc_decode_void,
704 .pc_encode = nlmsvc_encode_void,
705 .pc_argsize = sizeof(struct nlm_res),
706 .pc_argzero = sizeof(struct nlm_res),
707 .pc_ressize = sizeof(struct nlm_void),
708 .pc_xdrressize = St,
709 .pc_name = "CANCEL_RES",
710 },
711 [NLMPROC_UNLOCK_RES] = {
712 .pc_func = nlmsvc_proc_null,
713 .pc_decode = nlmsvc_decode_void,
714 .pc_encode = nlmsvc_encode_void,
715 .pc_argsize = sizeof(struct nlm_res),
716 .pc_argzero = sizeof(struct nlm_res),
717 .pc_ressize = sizeof(struct nlm_void),
718 .pc_xdrressize = St,
719 .pc_name = "UNLOCK_RES",
720 },
721 [NLMPROC_GRANTED_RES] = {
722 .pc_func = nlmsvc_proc_granted_res,
723 .pc_decode = nlmsvc_decode_res,
724 .pc_encode = nlmsvc_encode_void,
725 .pc_argsize = sizeof(struct nlm_res),
726 .pc_argzero = sizeof(struct nlm_res),
727 .pc_ressize = sizeof(struct nlm_void),
728 .pc_xdrressize = St,
729 .pc_name = "GRANTED_RES",
730 },
731 [NLMPROC_NSM_NOTIFY] = {
732 .pc_func = nlmsvc_proc_sm_notify,
733 .pc_decode = nlmsvc_decode_reboot,
734 .pc_encode = nlmsvc_encode_void,
735 .pc_argsize = sizeof(struct nlm_reboot),
736 .pc_argzero = sizeof(struct nlm_reboot),
737 .pc_ressize = sizeof(struct nlm_void),
738 .pc_xdrressize = St,
739 .pc_name = "SM_NOTIFY",
740 },
741 [17] = {
742 .pc_func = nlmsvc_proc_unused,
743 .pc_decode = nlmsvc_decode_void,
744 .pc_encode = nlmsvc_encode_void,
745 .pc_argsize = sizeof(struct nlm_void),
746 .pc_argzero = sizeof(struct nlm_void),
747 .pc_ressize = sizeof(struct nlm_void),
748 .pc_xdrressize = St,
749 .pc_name = "UNUSED",
750 },
751 [18] = {
752 .pc_func = nlmsvc_proc_unused,
753 .pc_decode = nlmsvc_decode_void,
754 .pc_encode = nlmsvc_encode_void,
755 .pc_argsize = sizeof(struct nlm_void),
756 .pc_argzero = sizeof(struct nlm_void),
757 .pc_ressize = sizeof(struct nlm_void),
758 .pc_xdrressize = St,
759 .pc_name = "UNUSED",
760 },
761 [19] = {
762 .pc_func = nlmsvc_proc_unused,
763 .pc_decode = nlmsvc_decode_void,
764 .pc_encode = nlmsvc_encode_void,
765 .pc_argsize = sizeof(struct nlm_void),
766 .pc_argzero = sizeof(struct nlm_void),
767 .pc_ressize = sizeof(struct nlm_void),
768 .pc_xdrressize = St,
769 .pc_name = "UNUSED",
770 },
771 [NLMPROC_SHARE] = {
772 .pc_func = nlmsvc_proc_share,
773 .pc_decode = nlmsvc_decode_shareargs,
774 .pc_encode = nlmsvc_encode_shareres,
775 .pc_argsize = sizeof(struct nlm_args),
776 .pc_argzero = sizeof(struct nlm_args),
777 .pc_ressize = sizeof(struct nlm_res),
778 .pc_xdrressize = Ck+St+1,
779 .pc_name = "SHARE",
780 },
781 [NLMPROC_UNSHARE] = {
782 .pc_func = nlmsvc_proc_unshare,
783 .pc_decode = nlmsvc_decode_shareargs,
784 .pc_encode = nlmsvc_encode_shareres,
785 .pc_argsize = sizeof(struct nlm_args),
786 .pc_argzero = sizeof(struct nlm_args),
787 .pc_ressize = sizeof(struct nlm_res),
788 .pc_xdrressize = Ck+St+1,
789 .pc_name = "UNSHARE",
790 },
791 [NLMPROC_NM_LOCK] = {
792 .pc_func = nlmsvc_proc_nm_lock,
793 .pc_decode = nlmsvc_decode_lockargs,
794 .pc_encode = nlmsvc_encode_res,
795 .pc_argsize = sizeof(struct nlm_args),
796 .pc_argzero = sizeof(struct nlm_args),
797 .pc_ressize = sizeof(struct nlm_res),
798 .pc_xdrressize = Ck+St,
799 .pc_name = "NM_LOCK",
800 },
801 [NLMPROC_FREE_ALL] = {
802 .pc_func = nlmsvc_proc_free_all,
803 .pc_decode = nlmsvc_decode_notify,
804 .pc_encode = nlmsvc_encode_void,
805 .pc_argsize = sizeof(struct nlm_args),
806 .pc_argzero = sizeof(struct nlm_args),
807 .pc_ressize = sizeof(struct nlm_void),
808 .pc_xdrressize = 0,
809 .pc_name = "FREE_ALL",
810 },
811 };
812
813 /*
814 * Storage requirements for XDR arguments and results
815 */
816 union nlmsvc_xdrstore {
817 struct nlm_args args;
818 struct nlm_res res;
819 struct nlm_reboot reboot;
820 };
821
822 /*
823 * NLMv1 defines only procedures 1 - 15. Linux lockd also implements
824 * procedures 0 (NULL) and 16 (SM_NOTIFY).
825 */
826 static DEFINE_PER_CPU_ALIGNED(unsigned long, nlm1svc_call_counters[17]);
827
828 const struct svc_version nlmsvc_version1 = {
829 .vs_vers = 1,
830 .vs_nproc = 17,
831 .vs_proc = nlmsvc_procedures,
832 .vs_count = nlm1svc_call_counters,
833 .vs_dispatch = nlmsvc_dispatch,
834 .vs_xdrsize = sizeof(union nlmsvc_xdrstore),
835 };
836
837 static DEFINE_PER_CPU_ALIGNED(unsigned long,
838 nlm3svc_call_counters[ARRAY_SIZE(nlmsvc_procedures)]);
839
840 const struct svc_version nlmsvc_version3 = {
841 .vs_vers = 3,
842 .vs_nproc = ARRAY_SIZE(nlmsvc_procedures),
843 .vs_proc = nlmsvc_procedures,
844 .vs_count = nlm3svc_call_counters,
845 .vs_dispatch = nlmsvc_dispatch,
846 .vs_xdrsize = sizeof(union nlmsvc_xdrstore),
847 };
848