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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/*
2 * linux/fs/lockd/svcproc.c
3 *
4 * Lockd server procedures. We don't implement the NLM_*_RES
5 * procedures because we don't use the async procedures.
6 *
7 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
8 */
9
10#include <linux/types.h>
11#include <linux/time.h>
12#include <linux/lockd/lockd.h>
13#include <linux/lockd/share.h>
14#include <linux/sunrpc/svc_xprt.h>
15
16#define NLMDBG_FACILITY NLMDBG_CLIENT
17
18#ifdef CONFIG_LOCKD_V4
19static __be32
20cast_to_nlm(__be32 status, u32 vers)
21{
22 /* Note: status is assumed to be in network byte order !!! */
23 if (vers != 4){
24 switch (status) {
25 case nlm_granted:
26 case nlm_lck_denied:
27 case nlm_lck_denied_nolocks:
28 case nlm_lck_blocked:
29 case nlm_lck_denied_grace_period:
30 case nlm_drop_reply:
31 break;
32 case nlm4_deadlock:
33 status = nlm_lck_denied;
34 break;
35 default:
36 status = nlm_lck_denied_nolocks;
37 }
38 }
39
40 return (status);
41}
42#define cast_status(status) (cast_to_nlm(status, rqstp->rq_vers))
43#else
44#define cast_status(status) (status)
45#endif
46
47/*
48 * Obtain client and file from arguments
49 */
50static __be32
51nlmsvc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp,
52 struct nlm_host **hostp, struct nlm_file **filp)
53{
54 struct nlm_host *host = NULL;
55 struct nlm_file *file = NULL;
56 struct nlm_lock *lock = &argp->lock;
57 __be32 error = 0;
58
59 /* nfsd callbacks must have been installed for this procedure */
60 if (!nlmsvc_ops)
61 return nlm_lck_denied_nolocks;
62
63 /* Obtain host handle */
64 if (!(host = nlmsvc_lookup_host(rqstp, lock->caller, lock->len))
65 || (argp->monitor && nsm_monitor(host) < 0))
66 goto no_locks;
67 *hostp = host;
68
69 /* Obtain file pointer. Not used by FREE_ALL call. */
70 if (filp != NULL) {
71 error = cast_status(nlm_lookup_file(rqstp, &file, &lock->fh));
72 if (error != 0)
73 goto no_locks;
74 *filp = file;
75
76 /* Set up the missing parts of the file_lock structure */
77 lock->fl.fl_file = file->f_file;
78 lock->fl.fl_owner = (fl_owner_t) host;
79 lock->fl.fl_lmops = &nlmsvc_lock_operations;
80 }
81
82 return 0;
83
84no_locks:
85 nlmsvc_release_host(host);
86 if (error)
87 return error;
88 return nlm_lck_denied_nolocks;
89}
90
91/*
92 * NULL: Test for presence of service
93 */
94static __be32
95nlmsvc_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
96{
97 dprintk("lockd: NULL called\n");
98 return rpc_success;
99}
100
101/*
102 * TEST: Check for conflicting lock
103 */
104static __be32
105nlmsvc_proc_test(struct svc_rqst *rqstp, struct nlm_args *argp,
106 struct nlm_res *resp)
107{
108 struct nlm_host *host;
109 struct nlm_file *file;
110 __be32 rc = rpc_success;
111
112 dprintk("lockd: TEST called\n");
113 resp->cookie = argp->cookie;
114
115 /* Obtain client and file */
116 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
117 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
118
119 /* Now check for conflicting locks */
120 resp->status = cast_status(nlmsvc_testlock(rqstp, file, host, &argp->lock, &resp->lock, &resp->cookie));
121 if (resp->status == nlm_drop_reply)
122 rc = rpc_drop_reply;
123 else
124 dprintk("lockd: TEST status %d vers %d\n",
125 ntohl(resp->status), rqstp->rq_vers);
126
127 nlmsvc_release_host(host);
128 nlm_release_file(file);
129 return rc;
130}
131
132static __be32
133nlmsvc_proc_lock(struct svc_rqst *rqstp, struct nlm_args *argp,
134 struct nlm_res *resp)
135{
136 struct nlm_host *host;
137 struct nlm_file *file;
138 __be32 rc = rpc_success;
139
140 dprintk("lockd: LOCK called\n");
141
142 resp->cookie = argp->cookie;
143
144 /* Obtain client and file */
145 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
146 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
147
148#if 0
149 /* If supplied state doesn't match current state, we assume it's
150 * an old request that time-warped somehow. Any error return would
151 * do in this case because it's irrelevant anyway.
152 *
153 * NB: We don't retrieve the remote host's state yet.
154 */
155 if (host->h_nsmstate && host->h_nsmstate != argp->state) {
156 resp->status = nlm_lck_denied_nolocks;
157 } else
158#endif
159
160 /* Now try to lock the file */
161 resp->status = cast_status(nlmsvc_lock(rqstp, file, host, &argp->lock,
162 argp->block, &argp->cookie,
163 argp->reclaim));
164 if (resp->status == nlm_drop_reply)
165 rc = rpc_drop_reply;
166 else
167 dprintk("lockd: LOCK status %d\n", ntohl(resp->status));
168
169 nlmsvc_release_host(host);
170 nlm_release_file(file);
171 return rc;
172}
173
174static __be32
175nlmsvc_proc_cancel(struct svc_rqst *rqstp, struct nlm_args *argp,
176 struct nlm_res *resp)
177{
178 struct nlm_host *host;
179 struct nlm_file *file;
180 struct net *net = SVC_NET(rqstp);
181
182 dprintk("lockd: CANCEL called\n");
183
184 resp->cookie = argp->cookie;
185
186 /* Don't accept requests during grace period */
187 if (locks_in_grace(net)) {
188 resp->status = nlm_lck_denied_grace_period;
189 return rpc_success;
190 }
191
192 /* Obtain client and file */
193 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
194 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
195
196 /* Try to cancel request. */
197 resp->status = cast_status(nlmsvc_cancel_blocked(net, file, &argp->lock));
198
199 dprintk("lockd: CANCEL status %d\n", ntohl(resp->status));
200 nlmsvc_release_host(host);
201 nlm_release_file(file);
202 return rpc_success;
203}
204
205/*
206 * UNLOCK: release a lock
207 */
208static __be32
209nlmsvc_proc_unlock(struct svc_rqst *rqstp, struct nlm_args *argp,
210 struct nlm_res *resp)
211{
212 struct nlm_host *host;
213 struct nlm_file *file;
214 struct net *net = SVC_NET(rqstp);
215
216 dprintk("lockd: UNLOCK called\n");
217
218 resp->cookie = argp->cookie;
219
220 /* Don't accept new lock requests during grace period */
221 if (locks_in_grace(net)) {
222 resp->status = nlm_lck_denied_grace_period;
223 return rpc_success;
224 }
225
226 /* Obtain client and file */
227 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
228 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
229
230 /* Now try to remove the lock */
231 resp->status = cast_status(nlmsvc_unlock(net, file, &argp->lock));
232
233 dprintk("lockd: UNLOCK status %d\n", ntohl(resp->status));
234 nlmsvc_release_host(host);
235 nlm_release_file(file);
236 return rpc_success;
237}
238
239/*
240 * GRANTED: A server calls us to tell that a process' lock request
241 * was granted
242 */
243static __be32
244nlmsvc_proc_granted(struct svc_rqst *rqstp, struct nlm_args *argp,
245 struct nlm_res *resp)
246{
247 resp->cookie = argp->cookie;
248
249 dprintk("lockd: GRANTED called\n");
250 resp->status = nlmclnt_grant(svc_addr(rqstp), &argp->lock);
251 dprintk("lockd: GRANTED status %d\n", ntohl(resp->status));
252 return rpc_success;
253}
254
255/*
256 * This is the generic lockd callback for async RPC calls
257 */
258static void nlmsvc_callback_exit(struct rpc_task *task, void *data)
259{
260 dprintk("lockd: %5u callback returned %d\n", task->tk_pid,
261 -task->tk_status);
262}
263
264void nlmsvc_release_call(struct nlm_rqst *call)
265{
266 if (!atomic_dec_and_test(&call->a_count))
267 return;
268 nlmsvc_release_host(call->a_host);
269 kfree(call);
270}
271
272static void nlmsvc_callback_release(void *data)
273{
274 nlmsvc_release_call(data);
275}
276
277static const struct rpc_call_ops nlmsvc_callback_ops = {
278 .rpc_call_done = nlmsvc_callback_exit,
279 .rpc_release = nlmsvc_callback_release,
280};
281
282/*
283 * `Async' versions of the above service routines. They aren't really,
284 * because we send the callback before the reply proper. I hope this
285 * doesn't break any clients.
286 */
287static __be32 nlmsvc_callback(struct svc_rqst *rqstp, u32 proc, struct nlm_args *argp,
288 __be32 (*func)(struct svc_rqst *, struct nlm_args *, struct nlm_res *))
289{
290 struct nlm_host *host;
291 struct nlm_rqst *call;
292 __be32 stat;
293
294 host = nlmsvc_lookup_host(rqstp,
295 argp->lock.caller,
296 argp->lock.len);
297 if (host == NULL)
298 return rpc_system_err;
299
300 call = nlm_alloc_call(host);
301 nlmsvc_release_host(host);
302 if (call == NULL)
303 return rpc_system_err;
304
305 stat = func(rqstp, argp, &call->a_res);
306 if (stat != 0) {
307 nlmsvc_release_call(call);
308 return stat;
309 }
310
311 call->a_flags = RPC_TASK_ASYNC;
312 if (nlm_async_reply(call, proc, &nlmsvc_callback_ops) < 0)
313 return rpc_system_err;
314 return rpc_success;
315}
316
317static __be32 nlmsvc_proc_test_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
318 void *resp)
319{
320 dprintk("lockd: TEST_MSG called\n");
321 return nlmsvc_callback(rqstp, NLMPROC_TEST_RES, argp, nlmsvc_proc_test);
322}
323
324static __be32 nlmsvc_proc_lock_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
325 void *resp)
326{
327 dprintk("lockd: LOCK_MSG called\n");
328 return nlmsvc_callback(rqstp, NLMPROC_LOCK_RES, argp, nlmsvc_proc_lock);
329}
330
331static __be32 nlmsvc_proc_cancel_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
332 void *resp)
333{
334 dprintk("lockd: CANCEL_MSG called\n");
335 return nlmsvc_callback(rqstp, NLMPROC_CANCEL_RES, argp, nlmsvc_proc_cancel);
336}
337
338static __be32
339nlmsvc_proc_unlock_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
340 void *resp)
341{
342 dprintk("lockd: UNLOCK_MSG called\n");
343 return nlmsvc_callback(rqstp, NLMPROC_UNLOCK_RES, argp, nlmsvc_proc_unlock);
344}
345
346static __be32
347nlmsvc_proc_granted_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
348 void *resp)
349{
350 dprintk("lockd: GRANTED_MSG called\n");
351 return nlmsvc_callback(rqstp, NLMPROC_GRANTED_RES, argp, nlmsvc_proc_granted);
352}
353
354/*
355 * SHARE: create a DOS share or alter existing share.
356 */
357static __be32
358nlmsvc_proc_share(struct svc_rqst *rqstp, struct nlm_args *argp,
359 struct nlm_res *resp)
360{
361 struct nlm_host *host;
362 struct nlm_file *file;
363
364 dprintk("lockd: SHARE called\n");
365
366 resp->cookie = argp->cookie;
367
368 /* Don't accept new lock requests during grace period */
369 if (locks_in_grace(SVC_NET(rqstp)) && !argp->reclaim) {
370 resp->status = nlm_lck_denied_grace_period;
371 return rpc_success;
372 }
373
374 /* Obtain client and file */
375 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
376 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
377
378 /* Now try to create the share */
379 resp->status = cast_status(nlmsvc_share_file(host, file, argp));
380
381 dprintk("lockd: SHARE status %d\n", ntohl(resp->status));
382 nlmsvc_release_host(host);
383 nlm_release_file(file);
384 return rpc_success;
385}
386
387/*
388 * UNSHARE: Release a DOS share.
389 */
390static __be32
391nlmsvc_proc_unshare(struct svc_rqst *rqstp, struct nlm_args *argp,
392 struct nlm_res *resp)
393{
394 struct nlm_host *host;
395 struct nlm_file *file;
396
397 dprintk("lockd: UNSHARE called\n");
398
399 resp->cookie = argp->cookie;
400
401 /* Don't accept requests during grace period */
402 if (locks_in_grace(SVC_NET(rqstp))) {
403 resp->status = nlm_lck_denied_grace_period;
404 return rpc_success;
405 }
406
407 /* Obtain client and file */
408 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
409 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
410
411 /* Now try to unshare the file */
412 resp->status = cast_status(nlmsvc_unshare_file(host, file, argp));
413
414 dprintk("lockd: UNSHARE status %d\n", ntohl(resp->status));
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 */
423static __be32
424nlmsvc_proc_nm_lock(struct svc_rqst *rqstp, struct nlm_args *argp,
425 struct nlm_res *resp)
426{
427 dprintk("lockd: NM_LOCK called\n");
428
429 argp->monitor = 0; /* just clean the monitor flag */
430 return nlmsvc_proc_lock(rqstp, argp, resp);
431}
432
433/*
434 * FREE_ALL: Release all locks and shares held by client
435 */
436static __be32
437nlmsvc_proc_free_all(struct svc_rqst *rqstp, struct nlm_args *argp,
438 void *resp)
439{
440 struct nlm_host *host;
441
442 /* Obtain client */
443 if (nlmsvc_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 * SM_NOTIFY: private callback from statd (not part of official NLM proto)
453 */
454static __be32
455nlmsvc_proc_sm_notify(struct svc_rqst *rqstp, struct nlm_reboot *argp,
456 void *resp)
457{
458 dprintk("lockd: SM_NOTIFY called\n");
459
460 if (!nlm_privileged_requester(rqstp)) {
461 char buf[RPC_MAX_ADDRBUFLEN];
462 printk(KERN_WARNING "lockd: rejected NSM callback from %s\n",
463 svc_print_addr(rqstp, buf, sizeof(buf)));
464 return rpc_system_err;
465 }
466
467 nlm_host_rebooted(argp);
468 return rpc_success;
469}
470
471/*
472 * client sent a GRANTED_RES, let's remove the associated block
473 */
474static __be32
475nlmsvc_proc_granted_res(struct svc_rqst *rqstp, struct nlm_res *argp,
476 void *resp)
477{
478 if (!nlmsvc_ops)
479 return rpc_success;
480
481 dprintk("lockd: GRANTED_RES called\n");
482
483 nlmsvc_grant_reply(&argp->cookie, argp->status);
484 return rpc_success;
485}
486
487/*
488 * NLM Server procedures.
489 */
490
491#define nlmsvc_encode_norep nlmsvc_encode_void
492#define nlmsvc_decode_norep nlmsvc_decode_void
493#define nlmsvc_decode_testres nlmsvc_decode_void
494#define nlmsvc_decode_lockres nlmsvc_decode_void
495#define nlmsvc_decode_unlockres nlmsvc_decode_void
496#define nlmsvc_decode_cancelres nlmsvc_decode_void
497#define nlmsvc_decode_grantedres nlmsvc_decode_void
498
499#define nlmsvc_proc_none nlmsvc_proc_null
500#define nlmsvc_proc_test_res nlmsvc_proc_null
501#define nlmsvc_proc_lock_res nlmsvc_proc_null
502#define nlmsvc_proc_cancel_res nlmsvc_proc_null
503#define nlmsvc_proc_unlock_res nlmsvc_proc_null
504
505struct nlm_void { int dummy; };
506
507#define PROC(name, xargt, xrest, argt, rest, respsize) \
508 { .pc_func = (svc_procfunc) nlmsvc_proc_##name, \
509 .pc_decode = (kxdrproc_t) nlmsvc_decode_##xargt, \
510 .pc_encode = (kxdrproc_t) nlmsvc_encode_##xrest, \
511 .pc_release = NULL, \
512 .pc_argsize = sizeof(struct nlm_##argt), \
513 .pc_ressize = sizeof(struct nlm_##rest), \
514 .pc_xdrressize = respsize, \
515 }
516
517#define Ck (1+XDR_QUADLEN(NLM_MAXCOOKIELEN)) /* cookie */
518#define St 1 /* status */
519#define No (1+1024/4) /* Net Obj */
520#define Rg 2 /* range - offset + size */
521
522struct svc_procedure nlmsvc_procedures[] = {
523 PROC(null, void, void, void, void, 1),
524 PROC(test, testargs, testres, args, res, Ck+St+2+No+Rg),
525 PROC(lock, lockargs, res, args, res, Ck+St),
526 PROC(cancel, cancargs, res, args, res, Ck+St),
527 PROC(unlock, unlockargs, res, args, res, Ck+St),
528 PROC(granted, testargs, res, args, res, Ck+St),
529 PROC(test_msg, testargs, norep, args, void, 1),
530 PROC(lock_msg, lockargs, norep, args, void, 1),
531 PROC(cancel_msg, cancargs, norep, args, void, 1),
532 PROC(unlock_msg, unlockargs, norep, args, void, 1),
533 PROC(granted_msg, testargs, norep, args, void, 1),
534 PROC(test_res, testres, norep, res, void, 1),
535 PROC(lock_res, lockres, norep, res, void, 1),
536 PROC(cancel_res, cancelres, norep, res, void, 1),
537 PROC(unlock_res, unlockres, norep, res, void, 1),
538 PROC(granted_res, res, norep, res, void, 1),
539 /* statd callback */
540 PROC(sm_notify, reboot, void, reboot, void, 1),
541 PROC(none, void, void, void, void, 1),
542 PROC(none, void, void, void, void, 1),
543 PROC(none, void, void, void, void, 1),
544 PROC(share, shareargs, shareres, args, res, Ck+St+1),
545 PROC(unshare, shareargs, shareres, args, res, Ck+St+1),
546 PROC(nm_lock, lockargs, res, args, res, Ck+St),
547 PROC(free_all, notify, void, args, void, 0),
548
549};