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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/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#ifdef CONFIG_LOCKD_V4
20static __be32
21cast_to_nlm(__be32 status, u32 vers)
22{
23 /* Note: status is assumed to be in network byte order !!! */
24 if (vers != 4){
25 switch (status) {
26 case nlm_granted:
27 case nlm_lck_denied:
28 case nlm_lck_denied_nolocks:
29 case nlm_lck_blocked:
30 case nlm_lck_denied_grace_period:
31 case nlm_drop_reply:
32 break;
33 case nlm4_deadlock:
34 status = nlm_lck_denied;
35 break;
36 default:
37 status = nlm_lck_denied_nolocks;
38 }
39 }
40
41 return (status);
42}
43#define cast_status(status) (cast_to_nlm(status, rqstp->rq_vers))
44#else
45#define cast_status(status) (status)
46#endif
47
48/*
49 * Obtain client and file from arguments
50 */
51static __be32
52nlmsvc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp,
53 struct nlm_host **hostp, struct nlm_file **filp)
54{
55 struct nlm_host *host = NULL;
56 struct nlm_file *file = NULL;
57 struct nlm_lock *lock = &argp->lock;
58 int mode;
59 __be32 error = 0;
60
61 /* nfsd callbacks must have been installed for this procedure */
62 if (!nlmsvc_ops)
63 return nlm_lck_denied_nolocks;
64
65 /* Obtain host handle */
66 if (!(host = nlmsvc_lookup_host(rqstp, lock->caller, lock->len))
67 || (argp->monitor && nsm_monitor(host) < 0))
68 goto no_locks;
69 *hostp = host;
70
71 /* Obtain file pointer. Not used by FREE_ALL call. */
72 if (filp != NULL) {
73 error = cast_status(nlm_lookup_file(rqstp, &file, lock));
74 if (error != 0)
75 goto no_locks;
76 *filp = file;
77
78 /* Set up the missing parts of the file_lock structure */
79 mode = lock_to_openmode(&lock->fl);
80 lock->fl.c.flc_flags = FL_POSIX;
81 lock->fl.c.flc_file = file->f_file[mode];
82 lock->fl.c.flc_pid = current->tgid;
83 lock->fl.fl_lmops = &nlmsvc_lock_operations;
84 nlmsvc_locks_init_private(&lock->fl, host, (pid_t)lock->svid);
85 if (!lock->fl.c.flc_owner) {
86 /* lockowner allocation has failed */
87 nlmsvc_release_host(host);
88 return nlm_lck_denied_nolocks;
89 }
90 }
91
92 return 0;
93
94no_locks:
95 nlmsvc_release_host(host);
96 if (error)
97 return error;
98 return nlm_lck_denied_nolocks;
99}
100
101/*
102 * NULL: Test for presence of service
103 */
104static __be32
105nlmsvc_proc_null(struct svc_rqst *rqstp)
106{
107 dprintk("lockd: NULL called\n");
108 return rpc_success;
109}
110
111/*
112 * TEST: Check for conflicting lock
113 */
114static __be32
115__nlmsvc_proc_test(struct svc_rqst *rqstp, struct nlm_res *resp)
116{
117 struct nlm_args *argp = rqstp->rq_argp;
118 struct nlm_host *host;
119 struct nlm_file *file;
120 struct nlm_lockowner *test_owner;
121 __be32 rc = rpc_success;
122
123 dprintk("lockd: TEST called\n");
124 resp->cookie = argp->cookie;
125
126 /* Obtain client and file */
127 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
128 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
129
130 test_owner = argp->lock.fl.c.flc_owner;
131
132 /* Now check for conflicting locks */
133 resp->status = cast_status(nlmsvc_testlock(rqstp, file, host,
134 &argp->lock, &resp->lock));
135 if (resp->status == nlm_drop_reply)
136 rc = rpc_drop_reply;
137 else
138 dprintk("lockd: TEST status %d vers %d\n",
139 ntohl(resp->status), rqstp->rq_vers);
140
141 nlmsvc_put_lockowner(test_owner);
142 nlmsvc_release_host(host);
143 nlm_release_file(file);
144 return rc;
145}
146
147static __be32
148nlmsvc_proc_test(struct svc_rqst *rqstp)
149{
150 return __nlmsvc_proc_test(rqstp, rqstp->rq_resp);
151}
152
153static __be32
154__nlmsvc_proc_lock(struct svc_rqst *rqstp, struct nlm_res *resp)
155{
156 struct nlm_args *argp = rqstp->rq_argp;
157 struct nlm_host *host;
158 struct nlm_file *file;
159 __be32 rc = rpc_success;
160
161 dprintk("lockd: LOCK called\n");
162
163 resp->cookie = argp->cookie;
164
165 /* Obtain client and file */
166 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
167 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
168
169 /* Now try to lock the file */
170 resp->status = cast_status(nlmsvc_lock(rqstp, file, host, &argp->lock,
171 argp->block, &argp->cookie,
172 argp->reclaim));
173 if (resp->status == nlm_drop_reply)
174 rc = rpc_drop_reply;
175 else
176 dprintk("lockd: LOCK status %d\n", ntohl(resp->status));
177
178 nlmsvc_release_lockowner(&argp->lock);
179 nlmsvc_release_host(host);
180 nlm_release_file(file);
181 return rc;
182}
183
184static __be32
185nlmsvc_proc_lock(struct svc_rqst *rqstp)
186{
187 return __nlmsvc_proc_lock(rqstp, rqstp->rq_resp);
188}
189
190static __be32
191__nlmsvc_proc_cancel(struct svc_rqst *rqstp, struct nlm_res *resp)
192{
193 struct nlm_args *argp = rqstp->rq_argp;
194 struct nlm_host *host;
195 struct nlm_file *file;
196 struct net *net = SVC_NET(rqstp);
197
198 dprintk("lockd: CANCEL called\n");
199
200 resp->cookie = argp->cookie;
201
202 /* Don't accept requests during grace period */
203 if (locks_in_grace(net)) {
204 resp->status = nlm_lck_denied_grace_period;
205 return rpc_success;
206 }
207
208 /* Obtain client and file */
209 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
210 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
211
212 /* Try to cancel request. */
213 resp->status = cast_status(nlmsvc_cancel_blocked(net, file, &argp->lock));
214
215 dprintk("lockd: CANCEL status %d\n", ntohl(resp->status));
216 nlmsvc_release_lockowner(&argp->lock);
217 nlmsvc_release_host(host);
218 nlm_release_file(file);
219 return rpc_success;
220}
221
222static __be32
223nlmsvc_proc_cancel(struct svc_rqst *rqstp)
224{
225 return __nlmsvc_proc_cancel(rqstp, rqstp->rq_resp);
226}
227
228/*
229 * UNLOCK: release a lock
230 */
231static __be32
232__nlmsvc_proc_unlock(struct svc_rqst *rqstp, struct nlm_res *resp)
233{
234 struct nlm_args *argp = rqstp->rq_argp;
235 struct nlm_host *host;
236 struct nlm_file *file;
237 struct net *net = SVC_NET(rqstp);
238
239 dprintk("lockd: UNLOCK called\n");
240
241 resp->cookie = argp->cookie;
242
243 /* Don't accept new lock requests during grace period */
244 if (locks_in_grace(net)) {
245 resp->status = nlm_lck_denied_grace_period;
246 return rpc_success;
247 }
248
249 /* Obtain client and file */
250 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
251 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
252
253 /* Now try to remove the lock */
254 resp->status = cast_status(nlmsvc_unlock(net, file, &argp->lock));
255
256 dprintk("lockd: UNLOCK status %d\n", ntohl(resp->status));
257 nlmsvc_release_lockowner(&argp->lock);
258 nlmsvc_release_host(host);
259 nlm_release_file(file);
260 return rpc_success;
261}
262
263static __be32
264nlmsvc_proc_unlock(struct svc_rqst *rqstp)
265{
266 return __nlmsvc_proc_unlock(rqstp, rqstp->rq_resp);
267}
268
269/*
270 * GRANTED: A server calls us to tell that a process' lock request
271 * was granted
272 */
273static __be32
274__nlmsvc_proc_granted(struct svc_rqst *rqstp, struct nlm_res *resp)
275{
276 struct nlm_args *argp = rqstp->rq_argp;
277
278 resp->cookie = argp->cookie;
279
280 dprintk("lockd: GRANTED called\n");
281 resp->status = nlmclnt_grant(svc_addr(rqstp), &argp->lock);
282 dprintk("lockd: GRANTED status %d\n", ntohl(resp->status));
283 return rpc_success;
284}
285
286static __be32
287nlmsvc_proc_granted(struct svc_rqst *rqstp)
288{
289 return __nlmsvc_proc_granted(rqstp, rqstp->rq_resp);
290}
291
292/*
293 * This is the generic lockd callback for async RPC calls
294 */
295static void nlmsvc_callback_exit(struct rpc_task *task, void *data)
296{
297}
298
299void nlmsvc_release_call(struct nlm_rqst *call)
300{
301 if (!refcount_dec_and_test(&call->a_count))
302 return;
303 nlmsvc_release_host(call->a_host);
304 kfree(call);
305}
306
307static void nlmsvc_callback_release(void *data)
308{
309 nlmsvc_release_call(data);
310}
311
312static const struct rpc_call_ops nlmsvc_callback_ops = {
313 .rpc_call_done = nlmsvc_callback_exit,
314 .rpc_release = nlmsvc_callback_release,
315};
316
317/*
318 * `Async' versions of the above service routines. They aren't really,
319 * because we send the callback before the reply proper. I hope this
320 * doesn't break any clients.
321 */
322static __be32 nlmsvc_callback(struct svc_rqst *rqstp, u32 proc,
323 __be32 (*func)(struct svc_rqst *, struct nlm_res *))
324{
325 struct nlm_args *argp = rqstp->rq_argp;
326 struct nlm_host *host;
327 struct nlm_rqst *call;
328 __be32 stat;
329
330 host = nlmsvc_lookup_host(rqstp,
331 argp->lock.caller,
332 argp->lock.len);
333 if (host == NULL)
334 return rpc_system_err;
335
336 call = nlm_alloc_call(host);
337 nlmsvc_release_host(host);
338 if (call == NULL)
339 return rpc_system_err;
340
341 stat = func(rqstp, &call->a_res);
342 if (stat != 0) {
343 nlmsvc_release_call(call);
344 return stat;
345 }
346
347 call->a_flags = RPC_TASK_ASYNC;
348 if (nlm_async_reply(call, proc, &nlmsvc_callback_ops) < 0)
349 return rpc_system_err;
350 return rpc_success;
351}
352
353static __be32 nlmsvc_proc_test_msg(struct svc_rqst *rqstp)
354{
355 dprintk("lockd: TEST_MSG called\n");
356 return nlmsvc_callback(rqstp, NLMPROC_TEST_RES, __nlmsvc_proc_test);
357}
358
359static __be32 nlmsvc_proc_lock_msg(struct svc_rqst *rqstp)
360{
361 dprintk("lockd: LOCK_MSG called\n");
362 return nlmsvc_callback(rqstp, NLMPROC_LOCK_RES, __nlmsvc_proc_lock);
363}
364
365static __be32 nlmsvc_proc_cancel_msg(struct svc_rqst *rqstp)
366{
367 dprintk("lockd: CANCEL_MSG called\n");
368 return nlmsvc_callback(rqstp, NLMPROC_CANCEL_RES, __nlmsvc_proc_cancel);
369}
370
371static __be32
372nlmsvc_proc_unlock_msg(struct svc_rqst *rqstp)
373{
374 dprintk("lockd: UNLOCK_MSG called\n");
375 return nlmsvc_callback(rqstp, NLMPROC_UNLOCK_RES, __nlmsvc_proc_unlock);
376}
377
378static __be32
379nlmsvc_proc_granted_msg(struct svc_rqst *rqstp)
380{
381 dprintk("lockd: GRANTED_MSG called\n");
382 return nlmsvc_callback(rqstp, NLMPROC_GRANTED_RES, __nlmsvc_proc_granted);
383}
384
385/*
386 * SHARE: create a DOS share or alter existing share.
387 */
388static __be32
389nlmsvc_proc_share(struct svc_rqst *rqstp)
390{
391 struct nlm_args *argp = rqstp->rq_argp;
392 struct nlm_res *resp = rqstp->rq_resp;
393 struct nlm_host *host;
394 struct nlm_file *file;
395
396 dprintk("lockd: SHARE called\n");
397
398 resp->cookie = argp->cookie;
399
400 /* Don't accept new lock requests during grace period */
401 if (locks_in_grace(SVC_NET(rqstp)) && !argp->reclaim) {
402 resp->status = nlm_lck_denied_grace_period;
403 return rpc_success;
404 }
405
406 /* Obtain client and file */
407 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
408 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
409
410 /* Now try to create the share */
411 resp->status = cast_status(nlmsvc_share_file(host, file, argp));
412
413 dprintk("lockd: SHARE status %d\n", ntohl(resp->status));
414 nlmsvc_release_lockowner(&argp->lock);
415 nlmsvc_release_host(host);
416 nlm_release_file(file);
417 return rpc_success;
418}
419
420/*
421 * UNSHARE: Release a DOS share.
422 */
423static __be32
424nlmsvc_proc_unshare(struct svc_rqst *rqstp)
425{
426 struct nlm_args *argp = rqstp->rq_argp;
427 struct nlm_res *resp = rqstp->rq_resp;
428 struct nlm_host *host;
429 struct nlm_file *file;
430
431 dprintk("lockd: UNSHARE called\n");
432
433 resp->cookie = argp->cookie;
434
435 /* Don't accept requests during grace period */
436 if (locks_in_grace(SVC_NET(rqstp))) {
437 resp->status = nlm_lck_denied_grace_period;
438 return rpc_success;
439 }
440
441 /* Obtain client and file */
442 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
443 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
444
445 /* Now try to unshare the file */
446 resp->status = cast_status(nlmsvc_unshare_file(host, file, argp));
447
448 dprintk("lockd: UNSHARE status %d\n", ntohl(resp->status));
449 nlmsvc_release_lockowner(&argp->lock);
450 nlmsvc_release_host(host);
451 nlm_release_file(file);
452 return rpc_success;
453}
454
455/*
456 * NM_LOCK: Create an unmonitored lock
457 */
458static __be32
459nlmsvc_proc_nm_lock(struct svc_rqst *rqstp)
460{
461 struct nlm_args *argp = rqstp->rq_argp;
462
463 dprintk("lockd: NM_LOCK called\n");
464
465 argp->monitor = 0; /* just clean the monitor flag */
466 return nlmsvc_proc_lock(rqstp);
467}
468
469/*
470 * FREE_ALL: Release all locks and shares held by client
471 */
472static __be32
473nlmsvc_proc_free_all(struct svc_rqst *rqstp)
474{
475 struct nlm_args *argp = rqstp->rq_argp;
476 struct nlm_host *host;
477
478 /* Obtain client */
479 if (nlmsvc_retrieve_args(rqstp, argp, &host, NULL))
480 return rpc_success;
481
482 nlmsvc_free_host_resources(host);
483 nlmsvc_release_host(host);
484 return rpc_success;
485}
486
487/*
488 * SM_NOTIFY: private callback from statd (not part of official NLM proto)
489 */
490static __be32
491nlmsvc_proc_sm_notify(struct svc_rqst *rqstp)
492{
493 struct nlm_reboot *argp = rqstp->rq_argp;
494
495 dprintk("lockd: SM_NOTIFY called\n");
496
497 if (!nlm_privileged_requester(rqstp)) {
498 char buf[RPC_MAX_ADDRBUFLEN];
499 printk(KERN_WARNING "lockd: rejected NSM callback from %s\n",
500 svc_print_addr(rqstp, buf, sizeof(buf)));
501 return rpc_system_err;
502 }
503
504 nlm_host_rebooted(SVC_NET(rqstp), argp);
505 return rpc_success;
506}
507
508/*
509 * client sent a GRANTED_RES, let's remove the associated block
510 */
511static __be32
512nlmsvc_proc_granted_res(struct svc_rqst *rqstp)
513{
514 struct nlm_res *argp = rqstp->rq_argp;
515
516 if (!nlmsvc_ops)
517 return rpc_success;
518
519 dprintk("lockd: GRANTED_RES called\n");
520
521 nlmsvc_grant_reply(&argp->cookie, argp->status);
522 return rpc_success;
523}
524
525static __be32
526nlmsvc_proc_unused(struct svc_rqst *rqstp)
527{
528 return rpc_proc_unavail;
529}
530
531/*
532 * NLM Server procedures.
533 */
534
535struct nlm_void { int dummy; };
536
537#define Ck (1+XDR_QUADLEN(NLM_MAXCOOKIELEN)) /* cookie */
538#define St 1 /* status */
539#define No (1+1024/4) /* Net Obj */
540#define Rg 2 /* range - offset + size */
541
542const struct svc_procedure nlmsvc_procedures[24] = {
543 [NLMPROC_NULL] = {
544 .pc_func = nlmsvc_proc_null,
545 .pc_decode = nlmsvc_decode_void,
546 .pc_encode = nlmsvc_encode_void,
547 .pc_argsize = sizeof(struct nlm_void),
548 .pc_argzero = sizeof(struct nlm_void),
549 .pc_ressize = sizeof(struct nlm_void),
550 .pc_xdrressize = St,
551 .pc_name = "NULL",
552 },
553 [NLMPROC_TEST] = {
554 .pc_func = nlmsvc_proc_test,
555 .pc_decode = nlmsvc_decode_testargs,
556 .pc_encode = nlmsvc_encode_testres,
557 .pc_argsize = sizeof(struct nlm_args),
558 .pc_argzero = sizeof(struct nlm_args),
559 .pc_ressize = sizeof(struct nlm_res),
560 .pc_xdrressize = Ck+St+2+No+Rg,
561 .pc_name = "TEST",
562 },
563 [NLMPROC_LOCK] = {
564 .pc_func = nlmsvc_proc_lock,
565 .pc_decode = nlmsvc_decode_lockargs,
566 .pc_encode = nlmsvc_encode_res,
567 .pc_argsize = sizeof(struct nlm_args),
568 .pc_argzero = sizeof(struct nlm_args),
569 .pc_ressize = sizeof(struct nlm_res),
570 .pc_xdrressize = Ck+St,
571 .pc_name = "LOCK",
572 },
573 [NLMPROC_CANCEL] = {
574 .pc_func = nlmsvc_proc_cancel,
575 .pc_decode = nlmsvc_decode_cancargs,
576 .pc_encode = nlmsvc_encode_res,
577 .pc_argsize = sizeof(struct nlm_args),
578 .pc_argzero = sizeof(struct nlm_args),
579 .pc_ressize = sizeof(struct nlm_res),
580 .pc_xdrressize = Ck+St,
581 .pc_name = "CANCEL",
582 },
583 [NLMPROC_UNLOCK] = {
584 .pc_func = nlmsvc_proc_unlock,
585 .pc_decode = nlmsvc_decode_unlockargs,
586 .pc_encode = nlmsvc_encode_res,
587 .pc_argsize = sizeof(struct nlm_args),
588 .pc_argzero = sizeof(struct nlm_args),
589 .pc_ressize = sizeof(struct nlm_res),
590 .pc_xdrressize = Ck+St,
591 .pc_name = "UNLOCK",
592 },
593 [NLMPROC_GRANTED] = {
594 .pc_func = nlmsvc_proc_granted,
595 .pc_decode = nlmsvc_decode_testargs,
596 .pc_encode = nlmsvc_encode_res,
597 .pc_argsize = sizeof(struct nlm_args),
598 .pc_argzero = sizeof(struct nlm_args),
599 .pc_ressize = sizeof(struct nlm_res),
600 .pc_xdrressize = Ck+St,
601 .pc_name = "GRANTED",
602 },
603 [NLMPROC_TEST_MSG] = {
604 .pc_func = nlmsvc_proc_test_msg,
605 .pc_decode = nlmsvc_decode_testargs,
606 .pc_encode = nlmsvc_encode_void,
607 .pc_argsize = sizeof(struct nlm_args),
608 .pc_argzero = sizeof(struct nlm_args),
609 .pc_ressize = sizeof(struct nlm_void),
610 .pc_xdrressize = St,
611 .pc_name = "TEST_MSG",
612 },
613 [NLMPROC_LOCK_MSG] = {
614 .pc_func = nlmsvc_proc_lock_msg,
615 .pc_decode = nlmsvc_decode_lockargs,
616 .pc_encode = nlmsvc_encode_void,
617 .pc_argsize = sizeof(struct nlm_args),
618 .pc_argzero = sizeof(struct nlm_args),
619 .pc_ressize = sizeof(struct nlm_void),
620 .pc_xdrressize = St,
621 .pc_name = "LOCK_MSG",
622 },
623 [NLMPROC_CANCEL_MSG] = {
624 .pc_func = nlmsvc_proc_cancel_msg,
625 .pc_decode = nlmsvc_decode_cancargs,
626 .pc_encode = nlmsvc_encode_void,
627 .pc_argsize = sizeof(struct nlm_args),
628 .pc_argzero = sizeof(struct nlm_args),
629 .pc_ressize = sizeof(struct nlm_void),
630 .pc_xdrressize = St,
631 .pc_name = "CANCEL_MSG",
632 },
633 [NLMPROC_UNLOCK_MSG] = {
634 .pc_func = nlmsvc_proc_unlock_msg,
635 .pc_decode = nlmsvc_decode_unlockargs,
636 .pc_encode = nlmsvc_encode_void,
637 .pc_argsize = sizeof(struct nlm_args),
638 .pc_argzero = sizeof(struct nlm_args),
639 .pc_ressize = sizeof(struct nlm_void),
640 .pc_xdrressize = St,
641 .pc_name = "UNLOCK_MSG",
642 },
643 [NLMPROC_GRANTED_MSG] = {
644 .pc_func = nlmsvc_proc_granted_msg,
645 .pc_decode = nlmsvc_decode_testargs,
646 .pc_encode = nlmsvc_encode_void,
647 .pc_argsize = sizeof(struct nlm_args),
648 .pc_argzero = sizeof(struct nlm_args),
649 .pc_ressize = sizeof(struct nlm_void),
650 .pc_xdrressize = St,
651 .pc_name = "GRANTED_MSG",
652 },
653 [NLMPROC_TEST_RES] = {
654 .pc_func = nlmsvc_proc_null,
655 .pc_decode = nlmsvc_decode_void,
656 .pc_encode = nlmsvc_encode_void,
657 .pc_argsize = sizeof(struct nlm_res),
658 .pc_argzero = sizeof(struct nlm_res),
659 .pc_ressize = sizeof(struct nlm_void),
660 .pc_xdrressize = St,
661 .pc_name = "TEST_RES",
662 },
663 [NLMPROC_LOCK_RES] = {
664 .pc_func = nlmsvc_proc_null,
665 .pc_decode = nlmsvc_decode_void,
666 .pc_encode = nlmsvc_encode_void,
667 .pc_argsize = sizeof(struct nlm_res),
668 .pc_argzero = sizeof(struct nlm_res),
669 .pc_ressize = sizeof(struct nlm_void),
670 .pc_xdrressize = St,
671 .pc_name = "LOCK_RES",
672 },
673 [NLMPROC_CANCEL_RES] = {
674 .pc_func = nlmsvc_proc_null,
675 .pc_decode = nlmsvc_decode_void,
676 .pc_encode = nlmsvc_encode_void,
677 .pc_argsize = sizeof(struct nlm_res),
678 .pc_argzero = sizeof(struct nlm_res),
679 .pc_ressize = sizeof(struct nlm_void),
680 .pc_xdrressize = St,
681 .pc_name = "CANCEL_RES",
682 },
683 [NLMPROC_UNLOCK_RES] = {
684 .pc_func = nlmsvc_proc_null,
685 .pc_decode = nlmsvc_decode_void,
686 .pc_encode = nlmsvc_encode_void,
687 .pc_argsize = sizeof(struct nlm_res),
688 .pc_argzero = sizeof(struct nlm_res),
689 .pc_ressize = sizeof(struct nlm_void),
690 .pc_xdrressize = St,
691 .pc_name = "UNLOCK_RES",
692 },
693 [NLMPROC_GRANTED_RES] = {
694 .pc_func = nlmsvc_proc_granted_res,
695 .pc_decode = nlmsvc_decode_res,
696 .pc_encode = nlmsvc_encode_void,
697 .pc_argsize = sizeof(struct nlm_res),
698 .pc_argzero = sizeof(struct nlm_res),
699 .pc_ressize = sizeof(struct nlm_void),
700 .pc_xdrressize = St,
701 .pc_name = "GRANTED_RES",
702 },
703 [NLMPROC_NSM_NOTIFY] = {
704 .pc_func = nlmsvc_proc_sm_notify,
705 .pc_decode = nlmsvc_decode_reboot,
706 .pc_encode = nlmsvc_encode_void,
707 .pc_argsize = sizeof(struct nlm_reboot),
708 .pc_argzero = sizeof(struct nlm_reboot),
709 .pc_ressize = sizeof(struct nlm_void),
710 .pc_xdrressize = St,
711 .pc_name = "SM_NOTIFY",
712 },
713 [17] = {
714 .pc_func = nlmsvc_proc_unused,
715 .pc_decode = nlmsvc_decode_void,
716 .pc_encode = nlmsvc_encode_void,
717 .pc_argsize = sizeof(struct nlm_void),
718 .pc_argzero = sizeof(struct nlm_void),
719 .pc_ressize = sizeof(struct nlm_void),
720 .pc_xdrressize = St,
721 .pc_name = "UNUSED",
722 },
723 [18] = {
724 .pc_func = nlmsvc_proc_unused,
725 .pc_decode = nlmsvc_decode_void,
726 .pc_encode = nlmsvc_encode_void,
727 .pc_argsize = sizeof(struct nlm_void),
728 .pc_argzero = sizeof(struct nlm_void),
729 .pc_ressize = sizeof(struct nlm_void),
730 .pc_xdrressize = St,
731 .pc_name = "UNUSED",
732 },
733 [19] = {
734 .pc_func = nlmsvc_proc_unused,
735 .pc_decode = nlmsvc_decode_void,
736 .pc_encode = nlmsvc_encode_void,
737 .pc_argsize = sizeof(struct nlm_void),
738 .pc_argzero = sizeof(struct nlm_void),
739 .pc_ressize = sizeof(struct nlm_void),
740 .pc_xdrressize = St,
741 .pc_name = "UNUSED",
742 },
743 [NLMPROC_SHARE] = {
744 .pc_func = nlmsvc_proc_share,
745 .pc_decode = nlmsvc_decode_shareargs,
746 .pc_encode = nlmsvc_encode_shareres,
747 .pc_argsize = sizeof(struct nlm_args),
748 .pc_argzero = sizeof(struct nlm_args),
749 .pc_ressize = sizeof(struct nlm_res),
750 .pc_xdrressize = Ck+St+1,
751 .pc_name = "SHARE",
752 },
753 [NLMPROC_UNSHARE] = {
754 .pc_func = nlmsvc_proc_unshare,
755 .pc_decode = nlmsvc_decode_shareargs,
756 .pc_encode = nlmsvc_encode_shareres,
757 .pc_argsize = sizeof(struct nlm_args),
758 .pc_argzero = sizeof(struct nlm_args),
759 .pc_ressize = sizeof(struct nlm_res),
760 .pc_xdrressize = Ck+St+1,
761 .pc_name = "UNSHARE",
762 },
763 [NLMPROC_NM_LOCK] = {
764 .pc_func = nlmsvc_proc_nm_lock,
765 .pc_decode = nlmsvc_decode_lockargs,
766 .pc_encode = nlmsvc_encode_res,
767 .pc_argsize = sizeof(struct nlm_args),
768 .pc_argzero = sizeof(struct nlm_args),
769 .pc_ressize = sizeof(struct nlm_res),
770 .pc_xdrressize = Ck+St,
771 .pc_name = "NM_LOCK",
772 },
773 [NLMPROC_FREE_ALL] = {
774 .pc_func = nlmsvc_proc_free_all,
775 .pc_decode = nlmsvc_decode_notify,
776 .pc_encode = nlmsvc_encode_void,
777 .pc_argsize = sizeof(struct nlm_args),
778 .pc_argzero = sizeof(struct nlm_args),
779 .pc_ressize = sizeof(struct nlm_void),
780 .pc_xdrressize = 0,
781 .pc_name = "FREE_ALL",
782 },
783};
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/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#ifdef CONFIG_LOCKD_V4
20static __be32
21cast_to_nlm(__be32 status, u32 vers)
22{
23 /* Note: status is assumed to be in network byte order !!! */
24 if (vers != 4){
25 switch (status) {
26 case nlm_granted:
27 case nlm_lck_denied:
28 case nlm_lck_denied_nolocks:
29 case nlm_lck_blocked:
30 case nlm_lck_denied_grace_period:
31 case nlm_drop_reply:
32 break;
33 case nlm4_deadlock:
34 status = nlm_lck_denied;
35 break;
36 default:
37 status = nlm_lck_denied_nolocks;
38 }
39 }
40
41 return (status);
42}
43#define cast_status(status) (cast_to_nlm(status, rqstp->rq_vers))
44#else
45#define cast_status(status) (status)
46#endif
47
48/*
49 * Obtain client and file from arguments
50 */
51static __be32
52nlmsvc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp,
53 struct nlm_host **hostp, struct nlm_file **filp)
54{
55 struct nlm_host *host = NULL;
56 struct nlm_file *file = NULL;
57 struct nlm_lock *lock = &argp->lock;
58 __be32 error = 0;
59
60 /* nfsd callbacks must have been installed for this procedure */
61 if (!nlmsvc_ops)
62 return nlm_lck_denied_nolocks;
63
64 /* Obtain host handle */
65 if (!(host = nlmsvc_lookup_host(rqstp, lock->caller, lock->len))
66 || (argp->monitor && nsm_monitor(host) < 0))
67 goto no_locks;
68 *hostp = host;
69
70 /* Obtain file pointer. Not used by FREE_ALL call. */
71 if (filp != NULL) {
72 error = cast_status(nlm_lookup_file(rqstp, &file, &lock->fh));
73 if (error != 0)
74 goto no_locks;
75 *filp = file;
76
77 /* Set up the missing parts of the file_lock structure */
78 lock->fl.fl_file = file->f_file;
79 lock->fl.fl_pid = current->tgid;
80 lock->fl.fl_lmops = &nlmsvc_lock_operations;
81 nlmsvc_locks_init_private(&lock->fl, host, (pid_t)lock->svid);
82 if (!lock->fl.fl_owner) {
83 /* lockowner allocation has failed */
84 nlmsvc_release_host(host);
85 return nlm_lck_denied_nolocks;
86 }
87 }
88
89 return 0;
90
91no_locks:
92 nlmsvc_release_host(host);
93 if (error)
94 return error;
95 return nlm_lck_denied_nolocks;
96}
97
98/*
99 * NULL: Test for presence of service
100 */
101static __be32
102nlmsvc_proc_null(struct svc_rqst *rqstp)
103{
104 dprintk("lockd: NULL called\n");
105 return rpc_success;
106}
107
108/*
109 * TEST: Check for conflicting lock
110 */
111static __be32
112__nlmsvc_proc_test(struct svc_rqst *rqstp, struct nlm_res *resp)
113{
114 struct nlm_args *argp = rqstp->rq_argp;
115 struct nlm_host *host;
116 struct nlm_file *file;
117 __be32 rc = rpc_success;
118
119 dprintk("lockd: TEST called\n");
120 resp->cookie = argp->cookie;
121
122 /* Obtain client and file */
123 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
124 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
125
126 /* Now check for conflicting locks */
127 resp->status = cast_status(nlmsvc_testlock(rqstp, file, host, &argp->lock, &resp->lock, &resp->cookie));
128 if (resp->status == nlm_drop_reply)
129 rc = rpc_drop_reply;
130 else
131 dprintk("lockd: TEST status %d vers %d\n",
132 ntohl(resp->status), rqstp->rq_vers);
133
134 nlmsvc_release_lockowner(&argp->lock);
135 nlmsvc_release_host(host);
136 nlm_release_file(file);
137 return rc;
138}
139
140static __be32
141nlmsvc_proc_test(struct svc_rqst *rqstp)
142{
143 return __nlmsvc_proc_test(rqstp, rqstp->rq_resp);
144}
145
146static __be32
147__nlmsvc_proc_lock(struct svc_rqst *rqstp, struct nlm_res *resp)
148{
149 struct nlm_args *argp = rqstp->rq_argp;
150 struct nlm_host *host;
151 struct nlm_file *file;
152 __be32 rc = rpc_success;
153
154 dprintk("lockd: LOCK called\n");
155
156 resp->cookie = argp->cookie;
157
158 /* Obtain client and file */
159 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
160 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
161
162#if 0
163 /* If supplied state doesn't match current state, we assume it's
164 * an old request that time-warped somehow. Any error return would
165 * do in this case because it's irrelevant anyway.
166 *
167 * NB: We don't retrieve the remote host's state yet.
168 */
169 if (host->h_nsmstate && host->h_nsmstate != argp->state) {
170 resp->status = nlm_lck_denied_nolocks;
171 } else
172#endif
173
174 /* Now try to lock the file */
175 resp->status = cast_status(nlmsvc_lock(rqstp, file, host, &argp->lock,
176 argp->block, &argp->cookie,
177 argp->reclaim));
178 if (resp->status == nlm_drop_reply)
179 rc = rpc_drop_reply;
180 else
181 dprintk("lockd: LOCK status %d\n", ntohl(resp->status));
182
183 nlmsvc_release_lockowner(&argp->lock);
184 nlmsvc_release_host(host);
185 nlm_release_file(file);
186 return rc;
187}
188
189static __be32
190nlmsvc_proc_lock(struct svc_rqst *rqstp)
191{
192 return __nlmsvc_proc_lock(rqstp, rqstp->rq_resp);
193}
194
195static __be32
196__nlmsvc_proc_cancel(struct svc_rqst *rqstp, struct nlm_res *resp)
197{
198 struct nlm_args *argp = rqstp->rq_argp;
199 struct nlm_host *host;
200 struct nlm_file *file;
201 struct net *net = SVC_NET(rqstp);
202
203 dprintk("lockd: CANCEL called\n");
204
205 resp->cookie = argp->cookie;
206
207 /* Don't accept requests during grace period */
208 if (locks_in_grace(net)) {
209 resp->status = nlm_lck_denied_grace_period;
210 return rpc_success;
211 }
212
213 /* Obtain client and file */
214 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
215 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
216
217 /* Try to cancel request. */
218 resp->status = cast_status(nlmsvc_cancel_blocked(net, file, &argp->lock));
219
220 dprintk("lockd: CANCEL status %d\n", ntohl(resp->status));
221 nlmsvc_release_lockowner(&argp->lock);
222 nlmsvc_release_host(host);
223 nlm_release_file(file);
224 return rpc_success;
225}
226
227static __be32
228nlmsvc_proc_cancel(struct svc_rqst *rqstp)
229{
230 return __nlmsvc_proc_cancel(rqstp, rqstp->rq_resp);
231}
232
233/*
234 * UNLOCK: release a lock
235 */
236static __be32
237__nlmsvc_proc_unlock(struct svc_rqst *rqstp, struct nlm_res *resp)
238{
239 struct nlm_args *argp = rqstp->rq_argp;
240 struct nlm_host *host;
241 struct nlm_file *file;
242 struct net *net = SVC_NET(rqstp);
243
244 dprintk("lockd: UNLOCK called\n");
245
246 resp->cookie = argp->cookie;
247
248 /* Don't accept new lock requests during grace period */
249 if (locks_in_grace(net)) {
250 resp->status = nlm_lck_denied_grace_period;
251 return rpc_success;
252 }
253
254 /* Obtain client and file */
255 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
256 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
257
258 /* Now try to remove the lock */
259 resp->status = cast_status(nlmsvc_unlock(net, file, &argp->lock));
260
261 dprintk("lockd: UNLOCK status %d\n", ntohl(resp->status));
262 nlmsvc_release_lockowner(&argp->lock);
263 nlmsvc_release_host(host);
264 nlm_release_file(file);
265 return rpc_success;
266}
267
268static __be32
269nlmsvc_proc_unlock(struct svc_rqst *rqstp)
270{
271 return __nlmsvc_proc_unlock(rqstp, rqstp->rq_resp);
272}
273
274/*
275 * GRANTED: A server calls us to tell that a process' lock request
276 * was granted
277 */
278static __be32
279__nlmsvc_proc_granted(struct svc_rqst *rqstp, struct nlm_res *resp)
280{
281 struct nlm_args *argp = rqstp->rq_argp;
282
283 resp->cookie = argp->cookie;
284
285 dprintk("lockd: GRANTED called\n");
286 resp->status = nlmclnt_grant(svc_addr(rqstp), &argp->lock);
287 dprintk("lockd: GRANTED status %d\n", ntohl(resp->status));
288 return rpc_success;
289}
290
291static __be32
292nlmsvc_proc_granted(struct svc_rqst *rqstp)
293{
294 return __nlmsvc_proc_granted(rqstp, rqstp->rq_resp);
295}
296
297/*
298 * This is the generic lockd callback for async RPC calls
299 */
300static void nlmsvc_callback_exit(struct rpc_task *task, void *data)
301{
302 dprintk("lockd: %5u callback returned %d\n", task->tk_pid,
303 -task->tk_status);
304}
305
306void nlmsvc_release_call(struct nlm_rqst *call)
307{
308 if (!refcount_dec_and_test(&call->a_count))
309 return;
310 nlmsvc_release_host(call->a_host);
311 kfree(call);
312}
313
314static void nlmsvc_callback_release(void *data)
315{
316 nlmsvc_release_call(data);
317}
318
319static const struct rpc_call_ops nlmsvc_callback_ops = {
320 .rpc_call_done = nlmsvc_callback_exit,
321 .rpc_release = nlmsvc_callback_release,
322};
323
324/*
325 * `Async' versions of the above service routines. They aren't really,
326 * because we send the callback before the reply proper. I hope this
327 * doesn't break any clients.
328 */
329static __be32 nlmsvc_callback(struct svc_rqst *rqstp, u32 proc,
330 __be32 (*func)(struct svc_rqst *, struct nlm_res *))
331{
332 struct nlm_args *argp = rqstp->rq_argp;
333 struct nlm_host *host;
334 struct nlm_rqst *call;
335 __be32 stat;
336
337 host = nlmsvc_lookup_host(rqstp,
338 argp->lock.caller,
339 argp->lock.len);
340 if (host == NULL)
341 return rpc_system_err;
342
343 call = nlm_alloc_call(host);
344 nlmsvc_release_host(host);
345 if (call == NULL)
346 return rpc_system_err;
347
348 stat = func(rqstp, &call->a_res);
349 if (stat != 0) {
350 nlmsvc_release_call(call);
351 return stat;
352 }
353
354 call->a_flags = RPC_TASK_ASYNC;
355 if (nlm_async_reply(call, proc, &nlmsvc_callback_ops) < 0)
356 return rpc_system_err;
357 return rpc_success;
358}
359
360static __be32 nlmsvc_proc_test_msg(struct svc_rqst *rqstp)
361{
362 dprintk("lockd: TEST_MSG called\n");
363 return nlmsvc_callback(rqstp, NLMPROC_TEST_RES, __nlmsvc_proc_test);
364}
365
366static __be32 nlmsvc_proc_lock_msg(struct svc_rqst *rqstp)
367{
368 dprintk("lockd: LOCK_MSG called\n");
369 return nlmsvc_callback(rqstp, NLMPROC_LOCK_RES, __nlmsvc_proc_lock);
370}
371
372static __be32 nlmsvc_proc_cancel_msg(struct svc_rqst *rqstp)
373{
374 dprintk("lockd: CANCEL_MSG called\n");
375 return nlmsvc_callback(rqstp, NLMPROC_CANCEL_RES, __nlmsvc_proc_cancel);
376}
377
378static __be32
379nlmsvc_proc_unlock_msg(struct svc_rqst *rqstp)
380{
381 dprintk("lockd: UNLOCK_MSG called\n");
382 return nlmsvc_callback(rqstp, NLMPROC_UNLOCK_RES, __nlmsvc_proc_unlock);
383}
384
385static __be32
386nlmsvc_proc_granted_msg(struct svc_rqst *rqstp)
387{
388 dprintk("lockd: GRANTED_MSG called\n");
389 return nlmsvc_callback(rqstp, NLMPROC_GRANTED_RES, __nlmsvc_proc_granted);
390}
391
392/*
393 * SHARE: create a DOS share or alter existing share.
394 */
395static __be32
396nlmsvc_proc_share(struct svc_rqst *rqstp)
397{
398 struct nlm_args *argp = rqstp->rq_argp;
399 struct nlm_res *resp = rqstp->rq_resp;
400 struct nlm_host *host;
401 struct nlm_file *file;
402
403 dprintk("lockd: SHARE called\n");
404
405 resp->cookie = argp->cookie;
406
407 /* Don't accept new lock requests during grace period */
408 if (locks_in_grace(SVC_NET(rqstp)) && !argp->reclaim) {
409 resp->status = nlm_lck_denied_grace_period;
410 return rpc_success;
411 }
412
413 /* Obtain client and file */
414 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
415 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
416
417 /* Now try to create the share */
418 resp->status = cast_status(nlmsvc_share_file(host, file, argp));
419
420 dprintk("lockd: SHARE status %d\n", ntohl(resp->status));
421 nlmsvc_release_lockowner(&argp->lock);
422 nlmsvc_release_host(host);
423 nlm_release_file(file);
424 return rpc_success;
425}
426
427/*
428 * UNSHARE: Release a DOS share.
429 */
430static __be32
431nlmsvc_proc_unshare(struct svc_rqst *rqstp)
432{
433 struct nlm_args *argp = rqstp->rq_argp;
434 struct nlm_res *resp = rqstp->rq_resp;
435 struct nlm_host *host;
436 struct nlm_file *file;
437
438 dprintk("lockd: UNSHARE called\n");
439
440 resp->cookie = argp->cookie;
441
442 /* Don't accept requests during grace period */
443 if (locks_in_grace(SVC_NET(rqstp))) {
444 resp->status = nlm_lck_denied_grace_period;
445 return rpc_success;
446 }
447
448 /* Obtain client and file */
449 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
450 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
451
452 /* Now try to unshare the file */
453 resp->status = cast_status(nlmsvc_unshare_file(host, file, argp));
454
455 dprintk("lockd: UNSHARE status %d\n", ntohl(resp->status));
456 nlmsvc_release_lockowner(&argp->lock);
457 nlmsvc_release_host(host);
458 nlm_release_file(file);
459 return rpc_success;
460}
461
462/*
463 * NM_LOCK: Create an unmonitored lock
464 */
465static __be32
466nlmsvc_proc_nm_lock(struct svc_rqst *rqstp)
467{
468 struct nlm_args *argp = rqstp->rq_argp;
469
470 dprintk("lockd: NM_LOCK called\n");
471
472 argp->monitor = 0; /* just clean the monitor flag */
473 return nlmsvc_proc_lock(rqstp);
474}
475
476/*
477 * FREE_ALL: Release all locks and shares held by client
478 */
479static __be32
480nlmsvc_proc_free_all(struct svc_rqst *rqstp)
481{
482 struct nlm_args *argp = rqstp->rq_argp;
483 struct nlm_host *host;
484
485 /* Obtain client */
486 if (nlmsvc_retrieve_args(rqstp, argp, &host, NULL))
487 return rpc_success;
488
489 nlmsvc_free_host_resources(host);
490 nlmsvc_release_host(host);
491 return rpc_success;
492}
493
494/*
495 * SM_NOTIFY: private callback from statd (not part of official NLM proto)
496 */
497static __be32
498nlmsvc_proc_sm_notify(struct svc_rqst *rqstp)
499{
500 struct nlm_reboot *argp = rqstp->rq_argp;
501
502 dprintk("lockd: SM_NOTIFY called\n");
503
504 if (!nlm_privileged_requester(rqstp)) {
505 char buf[RPC_MAX_ADDRBUFLEN];
506 printk(KERN_WARNING "lockd: rejected NSM callback from %s\n",
507 svc_print_addr(rqstp, buf, sizeof(buf)));
508 return rpc_system_err;
509 }
510
511 nlm_host_rebooted(SVC_NET(rqstp), argp);
512 return rpc_success;
513}
514
515/*
516 * client sent a GRANTED_RES, let's remove the associated block
517 */
518static __be32
519nlmsvc_proc_granted_res(struct svc_rqst *rqstp)
520{
521 struct nlm_res *argp = rqstp->rq_argp;
522
523 if (!nlmsvc_ops)
524 return rpc_success;
525
526 dprintk("lockd: GRANTED_RES called\n");
527
528 nlmsvc_grant_reply(&argp->cookie, argp->status);
529 return rpc_success;
530}
531
532static __be32
533nlmsvc_proc_unused(struct svc_rqst *rqstp)
534{
535 return rpc_proc_unavail;
536}
537
538/*
539 * NLM Server procedures.
540 */
541
542struct nlm_void { int dummy; };
543
544#define Ck (1+XDR_QUADLEN(NLM_MAXCOOKIELEN)) /* cookie */
545#define St 1 /* status */
546#define No (1+1024/4) /* Net Obj */
547#define Rg 2 /* range - offset + size */
548
549const struct svc_procedure nlmsvc_procedures[24] = {
550 [NLMPROC_NULL] = {
551 .pc_func = nlmsvc_proc_null,
552 .pc_decode = nlmsvc_decode_void,
553 .pc_encode = nlmsvc_encode_void,
554 .pc_argsize = sizeof(struct nlm_void),
555 .pc_ressize = sizeof(struct nlm_void),
556 .pc_xdrressize = St,
557 .pc_name = "NULL",
558 },
559 [NLMPROC_TEST] = {
560 .pc_func = nlmsvc_proc_test,
561 .pc_decode = nlmsvc_decode_testargs,
562 .pc_encode = nlmsvc_encode_testres,
563 .pc_argsize = sizeof(struct nlm_args),
564 .pc_ressize = sizeof(struct nlm_res),
565 .pc_xdrressize = Ck+St+2+No+Rg,
566 .pc_name = "TEST",
567 },
568 [NLMPROC_LOCK] = {
569 .pc_func = nlmsvc_proc_lock,
570 .pc_decode = nlmsvc_decode_lockargs,
571 .pc_encode = nlmsvc_encode_res,
572 .pc_argsize = sizeof(struct nlm_args),
573 .pc_ressize = sizeof(struct nlm_res),
574 .pc_xdrressize = Ck+St,
575 .pc_name = "LOCK",
576 },
577 [NLMPROC_CANCEL] = {
578 .pc_func = nlmsvc_proc_cancel,
579 .pc_decode = nlmsvc_decode_cancargs,
580 .pc_encode = nlmsvc_encode_res,
581 .pc_argsize = sizeof(struct nlm_args),
582 .pc_ressize = sizeof(struct nlm_res),
583 .pc_xdrressize = Ck+St,
584 .pc_name = "CANCEL",
585 },
586 [NLMPROC_UNLOCK] = {
587 .pc_func = nlmsvc_proc_unlock,
588 .pc_decode = nlmsvc_decode_unlockargs,
589 .pc_encode = nlmsvc_encode_res,
590 .pc_argsize = sizeof(struct nlm_args),
591 .pc_ressize = sizeof(struct nlm_res),
592 .pc_xdrressize = Ck+St,
593 .pc_name = "UNLOCK",
594 },
595 [NLMPROC_GRANTED] = {
596 .pc_func = nlmsvc_proc_granted,
597 .pc_decode = nlmsvc_decode_testargs,
598 .pc_encode = nlmsvc_encode_res,
599 .pc_argsize = sizeof(struct nlm_args),
600 .pc_ressize = sizeof(struct nlm_res),
601 .pc_xdrressize = Ck+St,
602 .pc_name = "GRANTED",
603 },
604 [NLMPROC_TEST_MSG] = {
605 .pc_func = nlmsvc_proc_test_msg,
606 .pc_decode = nlmsvc_decode_testargs,
607 .pc_encode = nlmsvc_encode_void,
608 .pc_argsize = sizeof(struct nlm_args),
609 .pc_ressize = sizeof(struct nlm_void),
610 .pc_xdrressize = St,
611 .pc_name = "TEST_MSG",
612 },
613 [NLMPROC_LOCK_MSG] = {
614 .pc_func = nlmsvc_proc_lock_msg,
615 .pc_decode = nlmsvc_decode_lockargs,
616 .pc_encode = nlmsvc_encode_void,
617 .pc_argsize = sizeof(struct nlm_args),
618 .pc_ressize = sizeof(struct nlm_void),
619 .pc_xdrressize = St,
620 .pc_name = "LOCK_MSG",
621 },
622 [NLMPROC_CANCEL_MSG] = {
623 .pc_func = nlmsvc_proc_cancel_msg,
624 .pc_decode = nlmsvc_decode_cancargs,
625 .pc_encode = nlmsvc_encode_void,
626 .pc_argsize = sizeof(struct nlm_args),
627 .pc_ressize = sizeof(struct nlm_void),
628 .pc_xdrressize = St,
629 .pc_name = "CANCEL_MSG",
630 },
631 [NLMPROC_UNLOCK_MSG] = {
632 .pc_func = nlmsvc_proc_unlock_msg,
633 .pc_decode = nlmsvc_decode_unlockargs,
634 .pc_encode = nlmsvc_encode_void,
635 .pc_argsize = sizeof(struct nlm_args),
636 .pc_ressize = sizeof(struct nlm_void),
637 .pc_xdrressize = St,
638 .pc_name = "UNLOCK_MSG",
639 },
640 [NLMPROC_GRANTED_MSG] = {
641 .pc_func = nlmsvc_proc_granted_msg,
642 .pc_decode = nlmsvc_decode_testargs,
643 .pc_encode = nlmsvc_encode_void,
644 .pc_argsize = sizeof(struct nlm_args),
645 .pc_ressize = sizeof(struct nlm_void),
646 .pc_xdrressize = St,
647 .pc_name = "GRANTED_MSG",
648 },
649 [NLMPROC_TEST_RES] = {
650 .pc_func = nlmsvc_proc_null,
651 .pc_decode = nlmsvc_decode_void,
652 .pc_encode = nlmsvc_encode_void,
653 .pc_argsize = sizeof(struct nlm_res),
654 .pc_ressize = sizeof(struct nlm_void),
655 .pc_xdrressize = St,
656 .pc_name = "TEST_RES",
657 },
658 [NLMPROC_LOCK_RES] = {
659 .pc_func = nlmsvc_proc_null,
660 .pc_decode = nlmsvc_decode_void,
661 .pc_encode = nlmsvc_encode_void,
662 .pc_argsize = sizeof(struct nlm_res),
663 .pc_ressize = sizeof(struct nlm_void),
664 .pc_xdrressize = St,
665 .pc_name = "LOCK_RES",
666 },
667 [NLMPROC_CANCEL_RES] = {
668 .pc_func = nlmsvc_proc_null,
669 .pc_decode = nlmsvc_decode_void,
670 .pc_encode = nlmsvc_encode_void,
671 .pc_argsize = sizeof(struct nlm_res),
672 .pc_ressize = sizeof(struct nlm_void),
673 .pc_xdrressize = St,
674 .pc_name = "CANCEL_RES",
675 },
676 [NLMPROC_UNLOCK_RES] = {
677 .pc_func = nlmsvc_proc_null,
678 .pc_decode = nlmsvc_decode_void,
679 .pc_encode = nlmsvc_encode_void,
680 .pc_argsize = sizeof(struct nlm_res),
681 .pc_ressize = sizeof(struct nlm_void),
682 .pc_xdrressize = St,
683 .pc_name = "UNLOCK_RES",
684 },
685 [NLMPROC_GRANTED_RES] = {
686 .pc_func = nlmsvc_proc_granted_res,
687 .pc_decode = nlmsvc_decode_res,
688 .pc_encode = nlmsvc_encode_void,
689 .pc_argsize = sizeof(struct nlm_res),
690 .pc_ressize = sizeof(struct nlm_void),
691 .pc_xdrressize = St,
692 .pc_name = "GRANTED_RES",
693 },
694 [NLMPROC_NSM_NOTIFY] = {
695 .pc_func = nlmsvc_proc_sm_notify,
696 .pc_decode = nlmsvc_decode_reboot,
697 .pc_encode = nlmsvc_encode_void,
698 .pc_argsize = sizeof(struct nlm_reboot),
699 .pc_ressize = sizeof(struct nlm_void),
700 .pc_xdrressize = St,
701 .pc_name = "SM_NOTIFY",
702 },
703 [17] = {
704 .pc_func = nlmsvc_proc_unused,
705 .pc_decode = nlmsvc_decode_void,
706 .pc_encode = nlmsvc_encode_void,
707 .pc_argsize = sizeof(struct nlm_void),
708 .pc_ressize = sizeof(struct nlm_void),
709 .pc_xdrressize = St,
710 .pc_name = "UNUSED",
711 },
712 [18] = {
713 .pc_func = nlmsvc_proc_unused,
714 .pc_decode = nlmsvc_decode_void,
715 .pc_encode = nlmsvc_encode_void,
716 .pc_argsize = sizeof(struct nlm_void),
717 .pc_ressize = sizeof(struct nlm_void),
718 .pc_xdrressize = St,
719 .pc_name = "UNUSED",
720 },
721 [19] = {
722 .pc_func = nlmsvc_proc_unused,
723 .pc_decode = nlmsvc_decode_void,
724 .pc_encode = nlmsvc_encode_void,
725 .pc_argsize = sizeof(struct nlm_void),
726 .pc_ressize = sizeof(struct nlm_void),
727 .pc_xdrressize = St,
728 .pc_name = "UNUSED",
729 },
730 [NLMPROC_SHARE] = {
731 .pc_func = nlmsvc_proc_share,
732 .pc_decode = nlmsvc_decode_shareargs,
733 .pc_encode = nlmsvc_encode_shareres,
734 .pc_argsize = sizeof(struct nlm_args),
735 .pc_ressize = sizeof(struct nlm_res),
736 .pc_xdrressize = Ck+St+1,
737 .pc_name = "SHARE",
738 },
739 [NLMPROC_UNSHARE] = {
740 .pc_func = nlmsvc_proc_unshare,
741 .pc_decode = nlmsvc_decode_shareargs,
742 .pc_encode = nlmsvc_encode_shareres,
743 .pc_argsize = sizeof(struct nlm_args),
744 .pc_ressize = sizeof(struct nlm_res),
745 .pc_xdrressize = Ck+St+1,
746 .pc_name = "UNSHARE",
747 },
748 [NLMPROC_NM_LOCK] = {
749 .pc_func = nlmsvc_proc_nm_lock,
750 .pc_decode = nlmsvc_decode_lockargs,
751 .pc_encode = nlmsvc_encode_res,
752 .pc_argsize = sizeof(struct nlm_args),
753 .pc_ressize = sizeof(struct nlm_res),
754 .pc_xdrressize = Ck+St,
755 .pc_name = "NM_LOCK",
756 },
757 [NLMPROC_FREE_ALL] = {
758 .pc_func = nlmsvc_proc_free_all,
759 .pc_decode = nlmsvc_decode_notify,
760 .pc_encode = nlmsvc_encode_void,
761 .pc_argsize = sizeof(struct nlm_args),
762 .pc_ressize = sizeof(struct nlm_void),
763 .pc_xdrressize = 0,
764 .pc_name = "FREE_ALL",
765 },
766};