xref: /linux/fs/lockd/svc4proc.c (revision ea8a163e02d6925773129e2dd86e419e491b791d)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * linux/fs/lockd/svc4proc.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 /*
20  * Obtain client and file from arguments
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 	/* nfsd callbacks must have been installed for this procedure */
32 	if (!nlmsvc_ops)
33 		return nlm_lck_denied_nolocks;
34 
35 	/* Obtain host handle */
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 	/* Obtain file pointer. Not used by FREE_ALL call. */
42 	if (filp != NULL) {
43 		int mode = lock_to_openmode(&lock->fl);
44 
45 		error = nlm_lookup_file(rqstp, &file, lock);
46 		if (error)
47 			goto no_locks;
48 		*filp = file;
49 
50 		/* Set up the missing parts of the file_lock structure */
51 		lock->fl.fl_file  = file->f_file[mode];
52 		lock->fl.fl_pid = current->tgid;
53 		lock->fl.fl_lmops = &nlmsvc_lock_operations;
54 		nlmsvc_locks_init_private(&lock->fl, host, (pid_t)lock->svid);
55 		if (!lock->fl.fl_owner) {
56 			/* lockowner allocation has failed */
57 			nlmsvc_release_host(host);
58 			return nlm_lck_denied_nolocks;
59 		}
60 	}
61 
62 	return 0;
63 
64 no_locks:
65 	nlmsvc_release_host(host);
66  	if (error)
67 		return error;
68 	return nlm_lck_denied_nolocks;
69 }
70 
71 /*
72  * NULL: Test for presence of service
73  */
74 static __be32
75 nlm4svc_proc_null(struct svc_rqst *rqstp)
76 {
77 	dprintk("lockd: NULL          called\n");
78 	return rpc_success;
79 }
80 
81 /*
82  * TEST: Check for conflicting lock
83  */
84 static __be32
85 __nlm4svc_proc_test(struct svc_rqst *rqstp, struct nlm_res *resp)
86 {
87 	struct nlm_args *argp = rqstp->rq_argp;
88 	struct nlm_host	*host;
89 	struct nlm_file	*file;
90 	__be32 rc = rpc_success;
91 
92 	dprintk("lockd: TEST4        called\n");
93 	resp->cookie = argp->cookie;
94 
95 	/* Obtain client and file */
96 	if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
97 		return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
98 
99 	/* Now check for conflicting locks */
100 	resp->status = nlmsvc_testlock(rqstp, file, host, &argp->lock, &resp->lock, &resp->cookie);
101 	if (resp->status == nlm_drop_reply)
102 		rc = rpc_drop_reply;
103 	else
104 		dprintk("lockd: TEST4        status %d\n", ntohl(resp->status));
105 
106 	nlmsvc_release_lockowner(&argp->lock);
107 	nlmsvc_release_host(host);
108 	nlm_release_file(file);
109 	return rc;
110 }
111 
112 static __be32
113 nlm4svc_proc_test(struct svc_rqst *rqstp)
114 {
115 	return __nlm4svc_proc_test(rqstp, rqstp->rq_resp);
116 }
117 
118 static __be32
119 __nlm4svc_proc_lock(struct svc_rqst *rqstp, struct nlm_res *resp)
120 {
121 	struct nlm_args *argp = rqstp->rq_argp;
122 	struct nlm_host	*host;
123 	struct nlm_file	*file;
124 	__be32 rc = rpc_success;
125 
126 	dprintk("lockd: LOCK          called\n");
127 
128 	resp->cookie = argp->cookie;
129 
130 	/* Obtain client and file */
131 	if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
132 		return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
133 
134 #if 0
135 	/* If supplied state doesn't match current state, we assume it's
136 	 * an old request that time-warped somehow. Any error return would
137 	 * do in this case because it's irrelevant anyway.
138 	 *
139 	 * NB: We don't retrieve the remote host's state yet.
140 	 */
141 	if (host->h_nsmstate && host->h_nsmstate != argp->state) {
142 		resp->status = nlm_lck_denied_nolocks;
143 	} else
144 #endif
145 
146 	/* Now try to lock the file */
147 	resp->status = nlmsvc_lock(rqstp, file, host, &argp->lock,
148 					argp->block, &argp->cookie,
149 					argp->reclaim);
150 	if (resp->status == nlm_drop_reply)
151 		rc = rpc_drop_reply;
152 	else
153 		dprintk("lockd: LOCK         status %d\n", ntohl(resp->status));
154 
155 	nlmsvc_release_lockowner(&argp->lock);
156 	nlmsvc_release_host(host);
157 	nlm_release_file(file);
158 	return rc;
159 }
160 
161 static __be32
162 nlm4svc_proc_lock(struct svc_rqst *rqstp)
163 {
164 	return __nlm4svc_proc_lock(rqstp, rqstp->rq_resp);
165 }
166 
167 static __be32
168 __nlm4svc_proc_cancel(struct svc_rqst *rqstp, struct nlm_res *resp)
169 {
170 	struct nlm_args *argp = rqstp->rq_argp;
171 	struct nlm_host	*host;
172 	struct nlm_file	*file;
173 
174 	dprintk("lockd: CANCEL        called\n");
175 
176 	resp->cookie = argp->cookie;
177 
178 	/* Don't accept requests during grace period */
179 	if (locks_in_grace(SVC_NET(rqstp))) {
180 		resp->status = nlm_lck_denied_grace_period;
181 		return rpc_success;
182 	}
183 
184 	/* Obtain client and file */
185 	if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
186 		return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
187 
188 	/* Try to cancel request. */
189 	resp->status = nlmsvc_cancel_blocked(SVC_NET(rqstp), file, &argp->lock);
190 
191 	dprintk("lockd: CANCEL        status %d\n", ntohl(resp->status));
192 	nlmsvc_release_lockowner(&argp->lock);
193 	nlmsvc_release_host(host);
194 	nlm_release_file(file);
195 	return rpc_success;
196 }
197 
198 static __be32
199 nlm4svc_proc_cancel(struct svc_rqst *rqstp)
200 {
201 	return __nlm4svc_proc_cancel(rqstp, rqstp->rq_resp);
202 }
203 
204 /*
205  * UNLOCK: release a lock
206  */
207 static __be32
208 __nlm4svc_proc_unlock(struct svc_rqst *rqstp, struct nlm_res *resp)
209 {
210 	struct nlm_args *argp = rqstp->rq_argp;
211 	struct nlm_host	*host;
212 	struct nlm_file	*file;
213 
214 	dprintk("lockd: UNLOCK        called\n");
215 
216 	resp->cookie = argp->cookie;
217 
218 	/* Don't accept new lock requests during grace period */
219 	if (locks_in_grace(SVC_NET(rqstp))) {
220 		resp->status = nlm_lck_denied_grace_period;
221 		return rpc_success;
222 	}
223 
224 	/* Obtain client and file */
225 	if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
226 		return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
227 
228 	/* Now try to remove the lock */
229 	resp->status = nlmsvc_unlock(SVC_NET(rqstp), file, &argp->lock);
230 
231 	dprintk("lockd: UNLOCK        status %d\n", ntohl(resp->status));
232 	nlmsvc_release_lockowner(&argp->lock);
233 	nlmsvc_release_host(host);
234 	nlm_release_file(file);
235 	return rpc_success;
236 }
237 
238 static __be32
239 nlm4svc_proc_unlock(struct svc_rqst *rqstp)
240 {
241 	return __nlm4svc_proc_unlock(rqstp, rqstp->rq_resp);
242 }
243 
244 /*
245  * GRANTED: A server calls us to tell that a process' lock request
246  * was granted
247  */
248 static __be32
249 __nlm4svc_proc_granted(struct svc_rqst *rqstp, struct nlm_res *resp)
250 {
251 	struct nlm_args *argp = rqstp->rq_argp;
252 
253 	resp->cookie = argp->cookie;
254 
255 	dprintk("lockd: GRANTED       called\n");
256 	resp->status = nlmclnt_grant(svc_addr(rqstp), &argp->lock);
257 	dprintk("lockd: GRANTED       status %d\n", ntohl(resp->status));
258 	return rpc_success;
259 }
260 
261 static __be32
262 nlm4svc_proc_granted(struct svc_rqst *rqstp)
263 {
264 	return __nlm4svc_proc_granted(rqstp, rqstp->rq_resp);
265 }
266 
267 /*
268  * This is the generic lockd callback for async RPC calls
269  */
270 static void nlm4svc_callback_exit(struct rpc_task *task, void *data)
271 {
272 }
273 
274 static void nlm4svc_callback_release(void *data)
275 {
276 	nlmsvc_release_call(data);
277 }
278 
279 static const struct rpc_call_ops nlm4svc_callback_ops = {
280 	.rpc_call_done = nlm4svc_callback_exit,
281 	.rpc_release = nlm4svc_callback_release,
282 };
283 
284 /*
285  * `Async' versions of the above service routines. They aren't really,
286  * because we send the callback before the reply proper. I hope this
287  * doesn't break any clients.
288  */
289 static __be32 nlm4svc_callback(struct svc_rqst *rqstp, u32 proc,
290 		__be32 (*func)(struct svc_rqst *,  struct nlm_res *))
291 {
292 	struct nlm_args *argp = rqstp->rq_argp;
293 	struct nlm_host	*host;
294 	struct nlm_rqst	*call;
295 	__be32 stat;
296 
297 	host = nlmsvc_lookup_host(rqstp,
298 				  argp->lock.caller,
299 				  argp->lock.len);
300 	if (host == NULL)
301 		return rpc_system_err;
302 
303 	call = nlm_alloc_call(host);
304 	nlmsvc_release_host(host);
305 	if (call == NULL)
306 		return rpc_system_err;
307 
308 	stat = func(rqstp, &call->a_res);
309 	if (stat != 0) {
310 		nlmsvc_release_call(call);
311 		return stat;
312 	}
313 
314 	call->a_flags = RPC_TASK_ASYNC;
315 	if (nlm_async_reply(call, proc, &nlm4svc_callback_ops) < 0)
316 		return rpc_system_err;
317 	return rpc_success;
318 }
319 
320 static __be32 nlm4svc_proc_test_msg(struct svc_rqst *rqstp)
321 {
322 	dprintk("lockd: TEST_MSG      called\n");
323 	return nlm4svc_callback(rqstp, NLMPROC_TEST_RES, __nlm4svc_proc_test);
324 }
325 
326 static __be32 nlm4svc_proc_lock_msg(struct svc_rqst *rqstp)
327 {
328 	dprintk("lockd: LOCK_MSG      called\n");
329 	return nlm4svc_callback(rqstp, NLMPROC_LOCK_RES, __nlm4svc_proc_lock);
330 }
331 
332 static __be32 nlm4svc_proc_cancel_msg(struct svc_rqst *rqstp)
333 {
334 	dprintk("lockd: CANCEL_MSG    called\n");
335 	return nlm4svc_callback(rqstp, NLMPROC_CANCEL_RES, __nlm4svc_proc_cancel);
336 }
337 
338 static __be32 nlm4svc_proc_unlock_msg(struct svc_rqst *rqstp)
339 {
340 	dprintk("lockd: UNLOCK_MSG    called\n");
341 	return nlm4svc_callback(rqstp, NLMPROC_UNLOCK_RES, __nlm4svc_proc_unlock);
342 }
343 
344 static __be32 nlm4svc_proc_granted_msg(struct svc_rqst *rqstp)
345 {
346 	dprintk("lockd: GRANTED_MSG   called\n");
347 	return nlm4svc_callback(rqstp, NLMPROC_GRANTED_RES, __nlm4svc_proc_granted);
348 }
349 
350 /*
351  * SHARE: create a DOS share or alter existing share.
352  */
353 static __be32
354 nlm4svc_proc_share(struct svc_rqst *rqstp)
355 {
356 	struct nlm_args *argp = rqstp->rq_argp;
357 	struct nlm_res *resp = rqstp->rq_resp;
358 	struct nlm_host	*host;
359 	struct nlm_file	*file;
360 
361 	dprintk("lockd: SHARE         called\n");
362 
363 	resp->cookie = argp->cookie;
364 
365 	/* Don't accept new lock requests during grace period */
366 	if (locks_in_grace(SVC_NET(rqstp)) && !argp->reclaim) {
367 		resp->status = nlm_lck_denied_grace_period;
368 		return rpc_success;
369 	}
370 
371 	/* Obtain client and file */
372 	if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
373 		return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
374 
375 	/* Now try to create the share */
376 	resp->status = nlmsvc_share_file(host, file, argp);
377 
378 	dprintk("lockd: SHARE         status %d\n", ntohl(resp->status));
379 	nlmsvc_release_lockowner(&argp->lock);
380 	nlmsvc_release_host(host);
381 	nlm_release_file(file);
382 	return rpc_success;
383 }
384 
385 /*
386  * UNSHARE: Release a DOS share.
387  */
388 static __be32
389 nlm4svc_proc_unshare(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: UNSHARE       called\n");
397 
398 	resp->cookie = argp->cookie;
399 
400 	/* Don't accept requests during grace period */
401 	if (locks_in_grace(SVC_NET(rqstp))) {
402 		resp->status = nlm_lck_denied_grace_period;
403 		return rpc_success;
404 	}
405 
406 	/* Obtain client and file */
407 	if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
408 		return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
409 
410 	/* Now try to lock the file */
411 	resp->status = nlmsvc_unshare_file(host, file, argp);
412 
413 	dprintk("lockd: UNSHARE       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  * NM_LOCK: Create an unmonitored lock
422  */
423 static __be32
424 nlm4svc_proc_nm_lock(struct svc_rqst *rqstp)
425 {
426 	struct nlm_args *argp = rqstp->rq_argp;
427 
428 	dprintk("lockd: NM_LOCK       called\n");
429 
430 	argp->monitor = 0;		/* just clean the monitor flag */
431 	return nlm4svc_proc_lock(rqstp);
432 }
433 
434 /*
435  * FREE_ALL: Release all locks and shares held by client
436  */
437 static __be32
438 nlm4svc_proc_free_all(struct svc_rqst *rqstp)
439 {
440 	struct nlm_args *argp = rqstp->rq_argp;
441 	struct nlm_host	*host;
442 
443 	/* Obtain client */
444 	if (nlm4svc_retrieve_args(rqstp, argp, &host, NULL))
445 		return rpc_success;
446 
447 	nlmsvc_free_host_resources(host);
448 	nlmsvc_release_host(host);
449 	return rpc_success;
450 }
451 
452 /*
453  * SM_NOTIFY: private callback from statd (not part of official NLM proto)
454  */
455 static __be32
456 nlm4svc_proc_sm_notify(struct svc_rqst *rqstp)
457 {
458 	struct nlm_reboot *argp = rqstp->rq_argp;
459 
460 	dprintk("lockd: SM_NOTIFY     called\n");
461 
462 	if (!nlm_privileged_requester(rqstp)) {
463 		char buf[RPC_MAX_ADDRBUFLEN];
464 		printk(KERN_WARNING "lockd: rejected NSM callback from %s\n",
465 				svc_print_addr(rqstp, buf, sizeof(buf)));
466 		return rpc_system_err;
467 	}
468 
469 	nlm_host_rebooted(SVC_NET(rqstp), argp);
470 	return rpc_success;
471 }
472 
473 /*
474  * client sent a GRANTED_RES, let's remove the associated block
475  */
476 static __be32
477 nlm4svc_proc_granted_res(struct svc_rqst *rqstp)
478 {
479 	struct nlm_res *argp = rqstp->rq_argp;
480 
481         if (!nlmsvc_ops)
482                 return rpc_success;
483 
484         dprintk("lockd: GRANTED_RES   called\n");
485 
486         nlmsvc_grant_reply(&argp->cookie, argp->status);
487         return rpc_success;
488 }
489 
490 static __be32
491 nlm4svc_proc_unused(struct svc_rqst *rqstp)
492 {
493 	return rpc_proc_unavail;
494 }
495 
496 
497 /*
498  * NLM Server procedures.
499  */
500 
501 struct nlm_void			{ int dummy; };
502 
503 #define	Ck	(1+XDR_QUADLEN(NLM_MAXCOOKIELEN))	/* cookie */
504 #define	No	(1+1024/4)				/* netobj */
505 #define	St	1					/* status */
506 #define	Rg	4					/* range (offset + length) */
507 
508 const struct svc_procedure nlmsvc_procedures4[24] = {
509 	[NLMPROC_NULL] = {
510 		.pc_func = nlm4svc_proc_null,
511 		.pc_decode = nlm4svc_decode_void,
512 		.pc_encode = nlm4svc_encode_void,
513 		.pc_argsize = sizeof(struct nlm_void),
514 		.pc_ressize = sizeof(struct nlm_void),
515 		.pc_xdrressize = St,
516 		.pc_name = "NULL",
517 	},
518 	[NLMPROC_TEST] = {
519 		.pc_func = nlm4svc_proc_test,
520 		.pc_decode = nlm4svc_decode_testargs,
521 		.pc_encode = nlm4svc_encode_testres,
522 		.pc_argsize = sizeof(struct nlm_args),
523 		.pc_ressize = sizeof(struct nlm_res),
524 		.pc_xdrressize = Ck+St+2+No+Rg,
525 		.pc_name = "TEST",
526 	},
527 	[NLMPROC_LOCK] = {
528 		.pc_func = nlm4svc_proc_lock,
529 		.pc_decode = nlm4svc_decode_lockargs,
530 		.pc_encode = nlm4svc_encode_res,
531 		.pc_argsize = sizeof(struct nlm_args),
532 		.pc_ressize = sizeof(struct nlm_res),
533 		.pc_xdrressize = Ck+St,
534 		.pc_name = "LOCK",
535 	},
536 	[NLMPROC_CANCEL] = {
537 		.pc_func = nlm4svc_proc_cancel,
538 		.pc_decode = nlm4svc_decode_cancargs,
539 		.pc_encode = nlm4svc_encode_res,
540 		.pc_argsize = sizeof(struct nlm_args),
541 		.pc_ressize = sizeof(struct nlm_res),
542 		.pc_xdrressize = Ck+St,
543 		.pc_name = "CANCEL",
544 	},
545 	[NLMPROC_UNLOCK] = {
546 		.pc_func = nlm4svc_proc_unlock,
547 		.pc_decode = nlm4svc_decode_unlockargs,
548 		.pc_encode = nlm4svc_encode_res,
549 		.pc_argsize = sizeof(struct nlm_args),
550 		.pc_ressize = sizeof(struct nlm_res),
551 		.pc_xdrressize = Ck+St,
552 		.pc_name = "UNLOCK",
553 	},
554 	[NLMPROC_GRANTED] = {
555 		.pc_func = nlm4svc_proc_granted,
556 		.pc_decode = nlm4svc_decode_testargs,
557 		.pc_encode = nlm4svc_encode_res,
558 		.pc_argsize = sizeof(struct nlm_args),
559 		.pc_ressize = sizeof(struct nlm_res),
560 		.pc_xdrressize = Ck+St,
561 		.pc_name = "GRANTED",
562 	},
563 	[NLMPROC_TEST_MSG] = {
564 		.pc_func = nlm4svc_proc_test_msg,
565 		.pc_decode = nlm4svc_decode_testargs,
566 		.pc_encode = nlm4svc_encode_void,
567 		.pc_argsize = sizeof(struct nlm_args),
568 		.pc_ressize = sizeof(struct nlm_void),
569 		.pc_xdrressize = St,
570 		.pc_name = "TEST_MSG",
571 	},
572 	[NLMPROC_LOCK_MSG] = {
573 		.pc_func = nlm4svc_proc_lock_msg,
574 		.pc_decode = nlm4svc_decode_lockargs,
575 		.pc_encode = nlm4svc_encode_void,
576 		.pc_argsize = sizeof(struct nlm_args),
577 		.pc_ressize = sizeof(struct nlm_void),
578 		.pc_xdrressize = St,
579 		.pc_name = "LOCK_MSG",
580 	},
581 	[NLMPROC_CANCEL_MSG] = {
582 		.pc_func = nlm4svc_proc_cancel_msg,
583 		.pc_decode = nlm4svc_decode_cancargs,
584 		.pc_encode = nlm4svc_encode_void,
585 		.pc_argsize = sizeof(struct nlm_args),
586 		.pc_ressize = sizeof(struct nlm_void),
587 		.pc_xdrressize = St,
588 		.pc_name = "CANCEL_MSG",
589 	},
590 	[NLMPROC_UNLOCK_MSG] = {
591 		.pc_func = nlm4svc_proc_unlock_msg,
592 		.pc_decode = nlm4svc_decode_unlockargs,
593 		.pc_encode = nlm4svc_encode_void,
594 		.pc_argsize = sizeof(struct nlm_args),
595 		.pc_ressize = sizeof(struct nlm_void),
596 		.pc_xdrressize = St,
597 		.pc_name = "UNLOCK_MSG",
598 	},
599 	[NLMPROC_GRANTED_MSG] = {
600 		.pc_func = nlm4svc_proc_granted_msg,
601 		.pc_decode = nlm4svc_decode_testargs,
602 		.pc_encode = nlm4svc_encode_void,
603 		.pc_argsize = sizeof(struct nlm_args),
604 		.pc_ressize = sizeof(struct nlm_void),
605 		.pc_xdrressize = St,
606 		.pc_name = "GRANTED_MSG",
607 	},
608 	[NLMPROC_TEST_RES] = {
609 		.pc_func = nlm4svc_proc_null,
610 		.pc_decode = nlm4svc_decode_void,
611 		.pc_encode = nlm4svc_encode_void,
612 		.pc_argsize = sizeof(struct nlm_res),
613 		.pc_ressize = sizeof(struct nlm_void),
614 		.pc_xdrressize = St,
615 		.pc_name = "TEST_RES",
616 	},
617 	[NLMPROC_LOCK_RES] = {
618 		.pc_func = nlm4svc_proc_null,
619 		.pc_decode = nlm4svc_decode_void,
620 		.pc_encode = nlm4svc_encode_void,
621 		.pc_argsize = sizeof(struct nlm_res),
622 		.pc_ressize = sizeof(struct nlm_void),
623 		.pc_xdrressize = St,
624 		.pc_name = "LOCK_RES",
625 	},
626 	[NLMPROC_CANCEL_RES] = {
627 		.pc_func = nlm4svc_proc_null,
628 		.pc_decode = nlm4svc_decode_void,
629 		.pc_encode = nlm4svc_encode_void,
630 		.pc_argsize = sizeof(struct nlm_res),
631 		.pc_ressize = sizeof(struct nlm_void),
632 		.pc_xdrressize = St,
633 		.pc_name = "CANCEL_RES",
634 	},
635 	[NLMPROC_UNLOCK_RES] = {
636 		.pc_func = nlm4svc_proc_null,
637 		.pc_decode = nlm4svc_decode_void,
638 		.pc_encode = nlm4svc_encode_void,
639 		.pc_argsize = sizeof(struct nlm_res),
640 		.pc_ressize = sizeof(struct nlm_void),
641 		.pc_xdrressize = St,
642 		.pc_name = "UNLOCK_RES",
643 	},
644 	[NLMPROC_GRANTED_RES] = {
645 		.pc_func = nlm4svc_proc_granted_res,
646 		.pc_decode = nlm4svc_decode_res,
647 		.pc_encode = nlm4svc_encode_void,
648 		.pc_argsize = sizeof(struct nlm_res),
649 		.pc_ressize = sizeof(struct nlm_void),
650 		.pc_xdrressize = St,
651 		.pc_name = "GRANTED_RES",
652 	},
653 	[NLMPROC_NSM_NOTIFY] = {
654 		.pc_func = nlm4svc_proc_sm_notify,
655 		.pc_decode = nlm4svc_decode_reboot,
656 		.pc_encode = nlm4svc_encode_void,
657 		.pc_argsize = sizeof(struct nlm_reboot),
658 		.pc_ressize = sizeof(struct nlm_void),
659 		.pc_xdrressize = St,
660 		.pc_name = "SM_NOTIFY",
661 	},
662 	[17] = {
663 		.pc_func = nlm4svc_proc_unused,
664 		.pc_decode = nlm4svc_decode_void,
665 		.pc_encode = nlm4svc_encode_void,
666 		.pc_argsize = sizeof(struct nlm_void),
667 		.pc_ressize = sizeof(struct nlm_void),
668 		.pc_xdrressize = 0,
669 		.pc_name = "UNUSED",
670 	},
671 	[18] = {
672 		.pc_func = nlm4svc_proc_unused,
673 		.pc_decode = nlm4svc_decode_void,
674 		.pc_encode = nlm4svc_encode_void,
675 		.pc_argsize = sizeof(struct nlm_void),
676 		.pc_ressize = sizeof(struct nlm_void),
677 		.pc_xdrressize = 0,
678 		.pc_name = "UNUSED",
679 	},
680 	[19] = {
681 		.pc_func = nlm4svc_proc_unused,
682 		.pc_decode = nlm4svc_decode_void,
683 		.pc_encode = nlm4svc_encode_void,
684 		.pc_argsize = sizeof(struct nlm_void),
685 		.pc_ressize = sizeof(struct nlm_void),
686 		.pc_xdrressize = 0,
687 		.pc_name = "UNUSED",
688 	},
689 	[NLMPROC_SHARE] = {
690 		.pc_func = nlm4svc_proc_share,
691 		.pc_decode = nlm4svc_decode_shareargs,
692 		.pc_encode = nlm4svc_encode_shareres,
693 		.pc_argsize = sizeof(struct nlm_args),
694 		.pc_ressize = sizeof(struct nlm_res),
695 		.pc_xdrressize = Ck+St+1,
696 		.pc_name = "SHARE",
697 	},
698 	[NLMPROC_UNSHARE] = {
699 		.pc_func = nlm4svc_proc_unshare,
700 		.pc_decode = nlm4svc_decode_shareargs,
701 		.pc_encode = nlm4svc_encode_shareres,
702 		.pc_argsize = sizeof(struct nlm_args),
703 		.pc_ressize = sizeof(struct nlm_res),
704 		.pc_xdrressize = Ck+St+1,
705 		.pc_name = "UNSHARE",
706 	},
707 	[NLMPROC_NM_LOCK] = {
708 		.pc_func = nlm4svc_proc_nm_lock,
709 		.pc_decode = nlm4svc_decode_lockargs,
710 		.pc_encode = nlm4svc_encode_res,
711 		.pc_argsize = sizeof(struct nlm_args),
712 		.pc_ressize = sizeof(struct nlm_res),
713 		.pc_xdrressize = Ck+St,
714 		.pc_name = "NM_LOCK",
715 	},
716 	[NLMPROC_FREE_ALL] = {
717 		.pc_func = nlm4svc_proc_free_all,
718 		.pc_decode = nlm4svc_decode_notify,
719 		.pc_encode = nlm4svc_encode_void,
720 		.pc_argsize = sizeof(struct nlm_args),
721 		.pc_ressize = sizeof(struct nlm_void),
722 		.pc_xdrressize = St,
723 		.pc_name = "FREE_ALL",
724 	},
725 };
726