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