blob: 3ca89e2a93812d32736f76ba3c444f28bc43a602 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/types.h>
11#include <linux/time.h>
12#include <linux/slab.h>
13#include <linux/in.h>
14#include <linux/sunrpc/svc.h>
15#include <linux/sunrpc/clnt.h>
16#include <linux/nfsd/nfsd.h>
17#include <linux/lockd/lockd.h>
18#include <linux/lockd/share.h>
19#include <linux/lockd/sm_inter.h>
20
21
22#define NLMDBG_FACILITY NLMDBG_CLIENT
23
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#ifdef CONFIG_LOCKD_V4
Al Viro52921e02006-10-19 23:28:46 -070025static __be32
26cast_to_nlm(__be32 status, u32 vers)
Linus Torvalds1da177e2005-04-16 15:20:36 -070027{
28 /* Note: status is assumed to be in network byte order !!! */
29 if (vers != 4){
30 switch (status) {
31 case nlm_granted:
32 case nlm_lck_denied:
33 case nlm_lck_denied_nolocks:
34 case nlm_lck_blocked:
35 case nlm_lck_denied_grace_period:
Marc Eshel5ea0d752006-11-28 16:27:06 -050036 case nlm_drop_reply:
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 break;
38 case nlm4_deadlock:
39 status = nlm_lck_denied;
40 break;
41 default:
42 status = nlm_lck_denied_nolocks;
43 }
44 }
45
46 return (status);
47}
48#define cast_status(status) (cast_to_nlm(status, rqstp->rq_vers))
49#else
50#define cast_status(status) (status)
51#endif
52
53/*
54 * Obtain client and file from arguments
55 */
Al Viro52921e02006-10-19 23:28:46 -070056static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -070057nlmsvc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp,
58 struct nlm_host **hostp, struct nlm_file **filp)
59{
60 struct nlm_host *host = NULL;
61 struct nlm_file *file = NULL;
62 struct nlm_lock *lock = &argp->lock;
Al Viro52921e02006-10-19 23:28:46 -070063 __be32 error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
65 /* nfsd callbacks must have been installed for this procedure */
66 if (!nlmsvc_ops)
67 return nlm_lck_denied_nolocks;
68
69 /* Obtain host handle */
Olaf Kirchdb4e4c92006-10-04 02:15:52 -070070 if (!(host = nlmsvc_lookup_host(rqstp, lock->caller, lock->len))
Olaf Kirch977faf32006-10-04 02:15:51 -070071 || (argp->monitor && nsm_monitor(host) < 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 goto no_locks;
73 *hostp = host;
74
75 /* Obtain file pointer. Not used by FREE_ALL call. */
76 if (filp != NULL) {
77 if ((error = nlm_lookup_file(rqstp, &file, &lock->fh)) != 0)
78 goto no_locks;
79 *filp = file;
80
81 /* Set up the missing parts of the file_lock structure */
82 lock->fl.fl_file = file->f_file;
83 lock->fl.fl_owner = (fl_owner_t) host;
84 lock->fl.fl_lmops = &nlmsvc_lock_operations;
85 }
86
87 return 0;
88
89no_locks:
Jeff Laytonb0e92aa2008-07-15 12:35:20 -040090 nlm_release_host(host);
NeilBrownd343fce2006-10-17 00:10:18 -070091 if (error)
92 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 return nlm_lck_denied_nolocks;
94}
95
96/*
97 * NULL: Test for presence of service
98 */
Al Viro7111c662006-10-19 23:28:45 -070099static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100nlmsvc_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
101{
102 dprintk("lockd: NULL called\n");
103 return rpc_success;
104}
105
106/*
107 * TEST: Check for conflicting lock
108 */
Al Viro7111c662006-10-19 23:28:45 -0700109static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110nlmsvc_proc_test(struct svc_rqst *rqstp, struct nlm_args *argp,
111 struct nlm_res *resp)
112{
113 struct nlm_host *host;
114 struct nlm_file *file;
Harvey Harrison317602f2008-07-20 23:41:24 -0700115 __be32 rc = rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116
117 dprintk("lockd: TEST called\n");
118 resp->cookie = argp->cookie;
119
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 /* Obtain client and file */
121 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
NeilBrownd343fce2006-10-17 00:10:18 -0700122 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
124 /* Now check for conflicting locks */
Jeff Layton8f920d52008-07-15 14:06:48 -0400125 resp->status = cast_status(nlmsvc_testlock(rqstp, file, host, &argp->lock, &resp->lock, &resp->cookie));
Marc Eshel5ea0d752006-11-28 16:27:06 -0500126 if (resp->status == nlm_drop_reply)
Oleg Drokinb7e6b862007-11-26 13:35:11 -0500127 rc = rpc_drop_reply;
128 else
129 dprintk("lockd: TEST status %d vers %d\n",
130 ntohl(resp->status), rqstp->rq_vers);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 nlm_release_host(host);
133 nlm_release_file(file);
Oleg Drokinb7e6b862007-11-26 13:35:11 -0500134 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135}
136
Al Viro7111c662006-10-19 23:28:45 -0700137static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138nlmsvc_proc_lock(struct svc_rqst *rqstp, struct nlm_args *argp,
139 struct nlm_res *resp)
140{
141 struct nlm_host *host;
142 struct nlm_file *file;
Harvey Harrison317602f2008-07-20 23:41:24 -0700143 __be32 rc = rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144
145 dprintk("lockd: LOCK called\n");
146
147 resp->cookie = argp->cookie;
148
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 /* Obtain client and file */
150 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
NeilBrownd343fce2006-10-17 00:10:18 -0700151 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
153#if 0
154 /* If supplied state doesn't match current state, we assume it's
155 * an old request that time-warped somehow. Any error return would
156 * do in this case because it's irrelevant anyway.
157 *
158 * NB: We don't retrieve the remote host's state yet.
159 */
160 if (host->h_nsmstate && host->h_nsmstate != argp->state) {
161 resp->status = nlm_lck_denied_nolocks;
162 } else
163#endif
164
165 /* Now try to lock the file */
Jeff Layton6cde4de2008-07-15 14:26:17 -0400166 resp->status = cast_status(nlmsvc_lock(rqstp, file, host, &argp->lock,
J. Bruce Fieldsb2b50282008-02-06 13:59:23 -0500167 argp->block, &argp->cookie,
168 argp->reclaim));
Marc Eshel1a8322b2006-11-28 16:27:06 -0500169 if (resp->status == nlm_drop_reply)
Oleg Drokinb7e6b862007-11-26 13:35:11 -0500170 rc = rpc_drop_reply;
171 else
172 dprintk("lockd: LOCK status %d\n", ntohl(resp->status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 nlm_release_host(host);
175 nlm_release_file(file);
Oleg Drokinb7e6b862007-11-26 13:35:11 -0500176 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177}
178
Al Viro7111c662006-10-19 23:28:45 -0700179static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180nlmsvc_proc_cancel(struct svc_rqst *rqstp, struct nlm_args *argp,
181 struct nlm_res *resp)
182{
183 struct nlm_host *host;
184 struct nlm_file *file;
185
186 dprintk("lockd: CANCEL called\n");
187
188 resp->cookie = argp->cookie;
189
190 /* Don't accept requests during grace period */
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -0400191 if (locks_in_grace()) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 resp->status = nlm_lck_denied_grace_period;
193 return rpc_success;
194 }
195
196 /* Obtain client and file */
197 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
NeilBrownd343fce2006-10-17 00:10:18 -0700198 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
200 /* Try to cancel request. */
201 resp->status = cast_status(nlmsvc_cancel_blocked(file, &argp->lock));
202
203 dprintk("lockd: CANCEL status %d\n", ntohl(resp->status));
204 nlm_release_host(host);
205 nlm_release_file(file);
206 return rpc_success;
207}
208
209/*
210 * UNLOCK: release a lock
211 */
Al Viro7111c662006-10-19 23:28:45 -0700212static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213nlmsvc_proc_unlock(struct svc_rqst *rqstp, struct nlm_args *argp,
214 struct nlm_res *resp)
215{
216 struct nlm_host *host;
217 struct nlm_file *file;
218
219 dprintk("lockd: UNLOCK called\n");
220
221 resp->cookie = argp->cookie;
222
223 /* Don't accept new lock requests during grace period */
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -0400224 if (locks_in_grace()) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 resp->status = nlm_lck_denied_grace_period;
226 return rpc_success;
227 }
228
229 /* Obtain client and file */
230 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
NeilBrownd343fce2006-10-17 00:10:18 -0700231 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
233 /* Now try to remove the lock */
234 resp->status = cast_status(nlmsvc_unlock(file, &argp->lock));
235
236 dprintk("lockd: UNLOCK status %d\n", ntohl(resp->status));
237 nlm_release_host(host);
238 nlm_release_file(file);
239 return rpc_success;
240}
241
242/*
243 * GRANTED: A server calls us to tell that a process' lock request
244 * was granted
245 */
Al Viro7111c662006-10-19 23:28:45 -0700246static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247nlmsvc_proc_granted(struct svc_rqst *rqstp, struct nlm_args *argp,
248 struct nlm_res *resp)
249{
250 resp->cookie = argp->cookie;
251
252 dprintk("lockd: GRANTED called\n");
Chuck Leverdcff09f2008-10-03 12:50:36 -0400253 resp->status = nlmclnt_grant(svc_addr(rqstp), &argp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 dprintk("lockd: GRANTED status %d\n", ntohl(resp->status));
255 return rpc_success;
256}
257
258/*
Trond Myklebustd4716622006-03-20 13:44:45 -0500259 * This is the generic lockd callback for async RPC calls
260 */
261static void nlmsvc_callback_exit(struct rpc_task *task, void *data)
262{
Chuck Leverc041b5f2006-12-05 16:36:03 -0500263 dprintk("lockd: %5u callback returned %d\n", task->tk_pid,
Trond Myklebustd4716622006-03-20 13:44:45 -0500264 -task->tk_status);
265}
266
267static void nlmsvc_callback_release(void *data)
268{
Trond Myklebusta86dc492008-06-11 13:37:09 -0400269 lock_kernel();
Trond Myklebustd4716622006-03-20 13:44:45 -0500270 nlm_release_call(data);
Trond Myklebusta86dc492008-06-11 13:37:09 -0400271 unlock_kernel();
Trond Myklebustd4716622006-03-20 13:44:45 -0500272}
273
274static const struct rpc_call_ops nlmsvc_callback_ops = {
275 .rpc_call_done = nlmsvc_callback_exit,
276 .rpc_release = nlmsvc_callback_release,
277};
278
279/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 * `Async' versions of the above service routines. They aren't really,
281 * because we send the callback before the reply proper. I hope this
282 * doesn't break any clients.
283 */
Al Viro7111c662006-10-19 23:28:45 -0700284static __be32 nlmsvc_callback(struct svc_rqst *rqstp, u32 proc, struct nlm_args *argp,
285 __be32 (*func)(struct svc_rqst *, struct nlm_args *, struct nlm_res *))
Trond Myklebustd4716622006-03-20 13:44:45 -0500286{
287 struct nlm_host *host;
288 struct nlm_rqst *call;
Al Viro7111c662006-10-19 23:28:45 -0700289 __be32 stat;
Trond Myklebustd4716622006-03-20 13:44:45 -0500290
Olaf Kirchdb4e4c92006-10-04 02:15:52 -0700291 host = nlmsvc_lookup_host(rqstp,
292 argp->lock.caller,
293 argp->lock.len);
Trond Myklebustd4716622006-03-20 13:44:45 -0500294 if (host == NULL)
295 return rpc_system_err;
296
297 call = nlm_alloc_call(host);
298 if (call == NULL)
299 return rpc_system_err;
300
301 stat = func(rqstp, argp, &call->a_res);
302 if (stat != 0) {
303 nlm_release_call(call);
304 return stat;
305 }
306
307 call->a_flags = RPC_TASK_ASYNC;
308 if (nlm_async_reply(call, proc, &nlmsvc_callback_ops) < 0)
309 return rpc_system_err;
310 return rpc_success;
311}
312
Al Viro7111c662006-10-19 23:28:45 -0700313static __be32 nlmsvc_proc_test_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 void *resp)
315{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 dprintk("lockd: TEST_MSG called\n");
Trond Myklebustd4716622006-03-20 13:44:45 -0500317 return nlmsvc_callback(rqstp, NLMPROC_TEST_RES, argp, nlmsvc_proc_test);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318}
319
Al Viro7111c662006-10-19 23:28:45 -0700320static __be32 nlmsvc_proc_lock_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 void *resp)
322{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 dprintk("lockd: LOCK_MSG called\n");
Trond Myklebustd4716622006-03-20 13:44:45 -0500324 return nlmsvc_callback(rqstp, NLMPROC_LOCK_RES, argp, nlmsvc_proc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325}
326
Al Viro7111c662006-10-19 23:28:45 -0700327static __be32 nlmsvc_proc_cancel_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 void *resp)
329{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 dprintk("lockd: CANCEL_MSG called\n");
Trond Myklebustd4716622006-03-20 13:44:45 -0500331 return nlmsvc_callback(rqstp, NLMPROC_CANCEL_RES, argp, nlmsvc_proc_cancel);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332}
333
Al Viro7111c662006-10-19 23:28:45 -0700334static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335nlmsvc_proc_unlock_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
336 void *resp)
337{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 dprintk("lockd: UNLOCK_MSG called\n");
Trond Myklebustd4716622006-03-20 13:44:45 -0500339 return nlmsvc_callback(rqstp, NLMPROC_UNLOCK_RES, argp, nlmsvc_proc_unlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340}
341
Al Viro7111c662006-10-19 23:28:45 -0700342static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343nlmsvc_proc_granted_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
344 void *resp)
345{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 dprintk("lockd: GRANTED_MSG called\n");
Trond Myklebustd4716622006-03-20 13:44:45 -0500347 return nlmsvc_callback(rqstp, NLMPROC_GRANTED_RES, argp, nlmsvc_proc_granted);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348}
349
350/*
351 * SHARE: create a DOS share or alter existing share.
352 */
Al Viro7111c662006-10-19 23:28:45 -0700353static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354nlmsvc_proc_share(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: SHARE called\n");
361
362 resp->cookie = argp->cookie;
363
364 /* Don't accept new lock requests during grace period */
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -0400365 if (locks_in_grace() && !argp->reclaim) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 resp->status = nlm_lck_denied_grace_period;
367 return rpc_success;
368 }
369
370 /* Obtain client and file */
371 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
NeilBrownd343fce2006-10-17 00:10:18 -0700372 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
374 /* Now try to create the share */
375 resp->status = cast_status(nlmsvc_share_file(host, file, argp));
376
377 dprintk("lockd: SHARE status %d\n", ntohl(resp->status));
378 nlm_release_host(host);
379 nlm_release_file(file);
380 return rpc_success;
381}
382
383/*
384 * UNSHARE: Release a DOS share.
385 */
Al Viro7111c662006-10-19 23:28:45 -0700386static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387nlmsvc_proc_unshare(struct svc_rqst *rqstp, struct nlm_args *argp,
388 struct nlm_res *resp)
389{
390 struct nlm_host *host;
391 struct nlm_file *file;
392
393 dprintk("lockd: UNSHARE called\n");
394
395 resp->cookie = argp->cookie;
396
397 /* Don't accept requests during grace period */
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -0400398 if (locks_in_grace()) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 resp->status = nlm_lck_denied_grace_period;
400 return rpc_success;
401 }
402
403 /* Obtain client and file */
404 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
NeilBrownd343fce2006-10-17 00:10:18 -0700405 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
407 /* Now try to unshare the file */
408 resp->status = cast_status(nlmsvc_unshare_file(host, file, argp));
409
410 dprintk("lockd: UNSHARE status %d\n", ntohl(resp->status));
411 nlm_release_host(host);
412 nlm_release_file(file);
413 return rpc_success;
414}
415
416/*
417 * NM_LOCK: Create an unmonitored lock
418 */
Al Viro7111c662006-10-19 23:28:45 -0700419static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420nlmsvc_proc_nm_lock(struct svc_rqst *rqstp, struct nlm_args *argp,
421 struct nlm_res *resp)
422{
423 dprintk("lockd: NM_LOCK called\n");
424
425 argp->monitor = 0; /* just clean the monitor flag */
426 return nlmsvc_proc_lock(rqstp, argp, resp);
427}
428
429/*
430 * FREE_ALL: Release all locks and shares held by client
431 */
Al Viro7111c662006-10-19 23:28:45 -0700432static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433nlmsvc_proc_free_all(struct svc_rqst *rqstp, struct nlm_args *argp,
434 void *resp)
435{
436 struct nlm_host *host;
437
438 /* Obtain client */
439 if (nlmsvc_retrieve_args(rqstp, argp, &host, NULL))
440 return rpc_success;
441
442 nlmsvc_free_host_resources(host);
443 nlm_release_host(host);
444 return rpc_success;
445}
446
447/*
448 * SM_NOTIFY: private callback from statd (not part of official NLM proto)
449 */
Al Viro7111c662006-10-19 23:28:45 -0700450static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451nlmsvc_proc_sm_notify(struct svc_rqst *rqstp, struct nlm_reboot *argp,
452 void *resp)
453{
Chuck Lever27459f02007-02-12 00:53:34 -0800454 struct sockaddr_in saddr;
455
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 dprintk("lockd: SM_NOTIFY called\n");
Chuck Leverb85e4672008-10-03 12:50:44 -0400457
458 if (!nlm_privileged_requester(rqstp)) {
Chuck Leverad06e4b2007-02-12 00:53:32 -0800459 char buf[RPC_MAX_ADDRBUFLEN];
460 printk(KERN_WARNING "lockd: rejected NSM callback from %s\n",
461 svc_print_addr(rqstp, buf, sizeof(buf)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 return rpc_system_err;
463 }
464
465 /* Obtain the host pointer for this NFS server and try to
466 * reclaim all locks we hold on this server.
467 */
Olaf Kirchcf712c22006-10-04 02:15:52 -0700468 memset(&saddr, 0, sizeof(saddr));
Chuck Leverd7dc61d2008-10-23 00:50:35 -0400469 saddr.sin_family = AF_INET;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 saddr.sin_addr.s_addr = argp->addr;
Olaf Kirch5c8dd292006-10-04 02:15:55 -0700471 nlm_host_rebooted(&saddr, argp->mon, argp->len, argp->state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
473 return rpc_success;
474}
475
476/*
477 * client sent a GRANTED_RES, let's remove the associated block
478 */
Al Viro7111c662006-10-19 23:28:45 -0700479static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480nlmsvc_proc_granted_res(struct svc_rqst *rqstp, struct nlm_res *argp,
481 void *resp)
482{
483 if (!nlmsvc_ops)
484 return rpc_success;
485
486 dprintk("lockd: GRANTED_RES called\n");
487
Olaf Kirch39be4502006-10-04 02:16:03 -0700488 nlmsvc_grant_reply(&argp->cookie, argp->status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 return rpc_success;
490}
491
492/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 * NLM Server procedures.
494 */
495
496#define nlmsvc_encode_norep nlmsvc_encode_void
497#define nlmsvc_decode_norep nlmsvc_decode_void
498#define nlmsvc_decode_testres nlmsvc_decode_void
499#define nlmsvc_decode_lockres nlmsvc_decode_void
500#define nlmsvc_decode_unlockres nlmsvc_decode_void
501#define nlmsvc_decode_cancelres nlmsvc_decode_void
502#define nlmsvc_decode_grantedres nlmsvc_decode_void
503
504#define nlmsvc_proc_none nlmsvc_proc_null
505#define nlmsvc_proc_test_res nlmsvc_proc_null
506#define nlmsvc_proc_lock_res nlmsvc_proc_null
507#define nlmsvc_proc_cancel_res nlmsvc_proc_null
508#define nlmsvc_proc_unlock_res nlmsvc_proc_null
509
510struct nlm_void { int dummy; };
511
512#define PROC(name, xargt, xrest, argt, rest, respsize) \
513 { .pc_func = (svc_procfunc) nlmsvc_proc_##name, \
514 .pc_decode = (kxdrproc_t) nlmsvc_decode_##xargt, \
515 .pc_encode = (kxdrproc_t) nlmsvc_encode_##xrest, \
516 .pc_release = NULL, \
517 .pc_argsize = sizeof(struct nlm_##argt), \
518 .pc_ressize = sizeof(struct nlm_##rest), \
519 .pc_xdrressize = respsize, \
520 }
521
522#define Ck (1+XDR_QUADLEN(NLM_MAXCOOKIELEN)) /* cookie */
523#define St 1 /* status */
524#define No (1+1024/4) /* Net Obj */
525#define Rg 2 /* range - offset + size */
526
527struct svc_procedure nlmsvc_procedures[] = {
528 PROC(null, void, void, void, void, 1),
529 PROC(test, testargs, testres, args, res, Ck+St+2+No+Rg),
530 PROC(lock, lockargs, res, args, res, Ck+St),
531 PROC(cancel, cancargs, res, args, res, Ck+St),
532 PROC(unlock, unlockargs, res, args, res, Ck+St),
533 PROC(granted, testargs, res, args, res, Ck+St),
534 PROC(test_msg, testargs, norep, args, void, 1),
535 PROC(lock_msg, lockargs, norep, args, void, 1),
536 PROC(cancel_msg, cancargs, norep, args, void, 1),
537 PROC(unlock_msg, unlockargs, norep, args, void, 1),
538 PROC(granted_msg, testargs, norep, args, void, 1),
539 PROC(test_res, testres, norep, res, void, 1),
540 PROC(lock_res, lockres, norep, res, void, 1),
541 PROC(cancel_res, cancelres, norep, res, void, 1),
542 PROC(unlock_res, unlockres, norep, res, void, 1),
543 PROC(granted_res, res, norep, res, void, 1),
544 /* statd callback */
545 PROC(sm_notify, reboot, void, reboot, void, 1),
546 PROC(none, void, void, void, void, 1),
547 PROC(none, void, void, void, void, 1),
548 PROC(none, void, void, void, void, 1),
549 PROC(share, shareargs, shareres, args, res, Ck+St+1),
550 PROC(unshare, shareargs, shareres, args, res, Ck+St+1),
551 PROC(nm_lock, lockargs, res, args, res, Ck+St),
552 PROC(free_all, notify, void, args, void, 0),
553
554};