blob: 1b013e19880489c9f534823740c5411d2efa03af [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
120 /* Don't accept test requests during grace period */
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -0400121 if (locks_in_grace()) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 resp->status = nlm_lck_denied_grace_period;
Oleg Drokinb7e6b862007-11-26 13:35:11 -0500123 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 }
125
126 /* Obtain client and file */
127 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
NeilBrownd343fce2006-10-17 00:10:18 -0700128 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
130 /* Now check for conflicting locks */
Jeff Layton8f920d52008-07-15 14:06:48 -0400131 resp->status = cast_status(nlmsvc_testlock(rqstp, file, host, &argp->lock, &resp->lock, &resp->cookie));
Marc Eshel5ea0d752006-11-28 16:27:06 -0500132 if (resp->status == nlm_drop_reply)
Oleg Drokinb7e6b862007-11-26 13:35:11 -0500133 rc = rpc_drop_reply;
134 else
135 dprintk("lockd: TEST status %d vers %d\n",
136 ntohl(resp->status), rqstp->rq_vers);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 nlm_release_host(host);
139 nlm_release_file(file);
Oleg Drokinb7e6b862007-11-26 13:35:11 -0500140 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141}
142
Al Viro7111c662006-10-19 23:28:45 -0700143static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144nlmsvc_proc_lock(struct svc_rqst *rqstp, struct nlm_args *argp,
145 struct nlm_res *resp)
146{
147 struct nlm_host *host;
148 struct nlm_file *file;
Harvey Harrison317602f2008-07-20 23:41:24 -0700149 __be32 rc = rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
151 dprintk("lockd: LOCK called\n");
152
153 resp->cookie = argp->cookie;
154
155 /* Don't accept new lock requests during grace period */
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -0400156 if (locks_in_grace() && !argp->reclaim) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 resp->status = nlm_lck_denied_grace_period;
Oleg Drokinb7e6b862007-11-26 13:35:11 -0500158 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 }
160
161 /* Obtain client and file */
162 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
NeilBrownd343fce2006-10-17 00:10:18 -0700163 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
165#if 0
166 /* If supplied state doesn't match current state, we assume it's
167 * an old request that time-warped somehow. Any error return would
168 * do in this case because it's irrelevant anyway.
169 *
170 * NB: We don't retrieve the remote host's state yet.
171 */
172 if (host->h_nsmstate && host->h_nsmstate != argp->state) {
173 resp->status = nlm_lck_denied_nolocks;
174 } else
175#endif
176
177 /* Now try to lock the file */
Jeff Layton6cde4de2008-07-15 14:26:17 -0400178 resp->status = cast_status(nlmsvc_lock(rqstp, file, host, &argp->lock,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 argp->block, &argp->cookie));
Marc Eshel1a8322b2006-11-28 16:27:06 -0500180 if (resp->status == nlm_drop_reply)
Oleg Drokinb7e6b862007-11-26 13:35:11 -0500181 rc = rpc_drop_reply;
182 else
183 dprintk("lockd: LOCK status %d\n", ntohl(resp->status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 nlm_release_host(host);
186 nlm_release_file(file);
Oleg Drokinb7e6b862007-11-26 13:35:11 -0500187 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188}
189
Al Viro7111c662006-10-19 23:28:45 -0700190static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191nlmsvc_proc_cancel(struct svc_rqst *rqstp, struct nlm_args *argp,
192 struct nlm_res *resp)
193{
194 struct nlm_host *host;
195 struct nlm_file *file;
196
197 dprintk("lockd: CANCEL called\n");
198
199 resp->cookie = argp->cookie;
200
201 /* Don't accept requests during grace period */
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -0400202 if (locks_in_grace()) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 resp->status = nlm_lck_denied_grace_period;
204 return rpc_success;
205 }
206
207 /* Obtain client and file */
208 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
NeilBrownd343fce2006-10-17 00:10:18 -0700209 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
211 /* Try to cancel request. */
212 resp->status = cast_status(nlmsvc_cancel_blocked(file, &argp->lock));
213
214 dprintk("lockd: CANCEL status %d\n", ntohl(resp->status));
215 nlm_release_host(host);
216 nlm_release_file(file);
217 return rpc_success;
218}
219
220/*
221 * UNLOCK: release a lock
222 */
Al Viro7111c662006-10-19 23:28:45 -0700223static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224nlmsvc_proc_unlock(struct svc_rqst *rqstp, struct nlm_args *argp,
225 struct nlm_res *resp)
226{
227 struct nlm_host *host;
228 struct nlm_file *file;
229
230 dprintk("lockd: UNLOCK called\n");
231
232 resp->cookie = argp->cookie;
233
234 /* Don't accept new lock requests during grace period */
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -0400235 if (locks_in_grace()) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 resp->status = nlm_lck_denied_grace_period;
237 return rpc_success;
238 }
239
240 /* Obtain client and file */
241 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
NeilBrownd343fce2006-10-17 00:10:18 -0700242 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243
244 /* Now try to remove the lock */
245 resp->status = cast_status(nlmsvc_unlock(file, &argp->lock));
246
247 dprintk("lockd: UNLOCK status %d\n", ntohl(resp->status));
248 nlm_release_host(host);
249 nlm_release_file(file);
250 return rpc_success;
251}
252
253/*
254 * GRANTED: A server calls us to tell that a process' lock request
255 * was granted
256 */
Al Viro7111c662006-10-19 23:28:45 -0700257static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258nlmsvc_proc_granted(struct svc_rqst *rqstp, struct nlm_args *argp,
259 struct nlm_res *resp)
260{
261 resp->cookie = argp->cookie;
262
263 dprintk("lockd: GRANTED called\n");
Chuck Lever27459f02007-02-12 00:53:34 -0800264 resp->status = nlmclnt_grant(svc_addr_in(rqstp), &argp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 dprintk("lockd: GRANTED status %d\n", ntohl(resp->status));
266 return rpc_success;
267}
268
269/*
Trond Myklebustd4716622006-03-20 13:44:45 -0500270 * This is the generic lockd callback for async RPC calls
271 */
272static void nlmsvc_callback_exit(struct rpc_task *task, void *data)
273{
Chuck Leverc041b5f2006-12-05 16:36:03 -0500274 dprintk("lockd: %5u callback returned %d\n", task->tk_pid,
Trond Myklebustd4716622006-03-20 13:44:45 -0500275 -task->tk_status);
276}
277
278static void nlmsvc_callback_release(void *data)
279{
Trond Myklebusta86dc492008-06-11 13:37:09 -0400280 lock_kernel();
Trond Myklebustd4716622006-03-20 13:44:45 -0500281 nlm_release_call(data);
Trond Myklebusta86dc492008-06-11 13:37:09 -0400282 unlock_kernel();
Trond Myklebustd4716622006-03-20 13:44:45 -0500283}
284
285static const struct rpc_call_ops nlmsvc_callback_ops = {
286 .rpc_call_done = nlmsvc_callback_exit,
287 .rpc_release = nlmsvc_callback_release,
288};
289
290/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 * `Async' versions of the above service routines. They aren't really,
292 * because we send the callback before the reply proper. I hope this
293 * doesn't break any clients.
294 */
Al Viro7111c662006-10-19 23:28:45 -0700295static __be32 nlmsvc_callback(struct svc_rqst *rqstp, u32 proc, struct nlm_args *argp,
296 __be32 (*func)(struct svc_rqst *, struct nlm_args *, struct nlm_res *))
Trond Myklebustd4716622006-03-20 13:44:45 -0500297{
298 struct nlm_host *host;
299 struct nlm_rqst *call;
Al Viro7111c662006-10-19 23:28:45 -0700300 __be32 stat;
Trond Myklebustd4716622006-03-20 13:44:45 -0500301
Olaf Kirchdb4e4c92006-10-04 02:15:52 -0700302 host = nlmsvc_lookup_host(rqstp,
303 argp->lock.caller,
304 argp->lock.len);
Trond Myklebustd4716622006-03-20 13:44:45 -0500305 if (host == NULL)
306 return rpc_system_err;
307
308 call = nlm_alloc_call(host);
309 if (call == NULL)
310 return rpc_system_err;
311
312 stat = func(rqstp, argp, &call->a_res);
313 if (stat != 0) {
314 nlm_release_call(call);
315 return stat;
316 }
317
318 call->a_flags = RPC_TASK_ASYNC;
319 if (nlm_async_reply(call, proc, &nlmsvc_callback_ops) < 0)
320 return rpc_system_err;
321 return rpc_success;
322}
323
Al Viro7111c662006-10-19 23:28:45 -0700324static __be32 nlmsvc_proc_test_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 void *resp)
326{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 dprintk("lockd: TEST_MSG called\n");
Trond Myklebustd4716622006-03-20 13:44:45 -0500328 return nlmsvc_callback(rqstp, NLMPROC_TEST_RES, argp, nlmsvc_proc_test);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329}
330
Al Viro7111c662006-10-19 23:28:45 -0700331static __be32 nlmsvc_proc_lock_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 void *resp)
333{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 dprintk("lockd: LOCK_MSG called\n");
Trond Myklebustd4716622006-03-20 13:44:45 -0500335 return nlmsvc_callback(rqstp, NLMPROC_LOCK_RES, argp, nlmsvc_proc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336}
337
Al Viro7111c662006-10-19 23:28:45 -0700338static __be32 nlmsvc_proc_cancel_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 void *resp)
340{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 dprintk("lockd: CANCEL_MSG called\n");
Trond Myklebustd4716622006-03-20 13:44:45 -0500342 return nlmsvc_callback(rqstp, NLMPROC_CANCEL_RES, argp, nlmsvc_proc_cancel);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343}
344
Al Viro7111c662006-10-19 23:28:45 -0700345static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346nlmsvc_proc_unlock_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
347 void *resp)
348{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 dprintk("lockd: UNLOCK_MSG called\n");
Trond Myklebustd4716622006-03-20 13:44:45 -0500350 return nlmsvc_callback(rqstp, NLMPROC_UNLOCK_RES, argp, nlmsvc_proc_unlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351}
352
Al Viro7111c662006-10-19 23:28:45 -0700353static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354nlmsvc_proc_granted_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
355 void *resp)
356{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 dprintk("lockd: GRANTED_MSG called\n");
Trond Myklebustd4716622006-03-20 13:44:45 -0500358 return nlmsvc_callback(rqstp, NLMPROC_GRANTED_RES, argp, nlmsvc_proc_granted);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359}
360
361/*
362 * SHARE: create a DOS share or alter existing share.
363 */
Al Viro7111c662006-10-19 23:28:45 -0700364static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365nlmsvc_proc_share(struct svc_rqst *rqstp, struct nlm_args *argp,
366 struct nlm_res *resp)
367{
368 struct nlm_host *host;
369 struct nlm_file *file;
370
371 dprintk("lockd: SHARE called\n");
372
373 resp->cookie = argp->cookie;
374
375 /* Don't accept new lock requests during grace period */
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -0400376 if (locks_in_grace() && !argp->reclaim) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 resp->status = nlm_lck_denied_grace_period;
378 return rpc_success;
379 }
380
381 /* Obtain client and file */
382 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
NeilBrownd343fce2006-10-17 00:10:18 -0700383 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
385 /* Now try to create the share */
386 resp->status = cast_status(nlmsvc_share_file(host, file, argp));
387
388 dprintk("lockd: SHARE status %d\n", ntohl(resp->status));
389 nlm_release_host(host);
390 nlm_release_file(file);
391 return rpc_success;
392}
393
394/*
395 * UNSHARE: Release a DOS share.
396 */
Al Viro7111c662006-10-19 23:28:45 -0700397static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398nlmsvc_proc_unshare(struct svc_rqst *rqstp, struct nlm_args *argp,
399 struct nlm_res *resp)
400{
401 struct nlm_host *host;
402 struct nlm_file *file;
403
404 dprintk("lockd: UNSHARE called\n");
405
406 resp->cookie = argp->cookie;
407
408 /* Don't accept requests during grace period */
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -0400409 if (locks_in_grace()) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 resp->status = nlm_lck_denied_grace_period;
411 return rpc_success;
412 }
413
414 /* Obtain client and file */
415 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
NeilBrownd343fce2006-10-17 00:10:18 -0700416 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417
418 /* Now try to unshare the file */
419 resp->status = cast_status(nlmsvc_unshare_file(host, file, argp));
420
421 dprintk("lockd: UNSHARE status %d\n", ntohl(resp->status));
422 nlm_release_host(host);
423 nlm_release_file(file);
424 return rpc_success;
425}
426
427/*
428 * NM_LOCK: Create an unmonitored lock
429 */
Al Viro7111c662006-10-19 23:28:45 -0700430static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431nlmsvc_proc_nm_lock(struct svc_rqst *rqstp, struct nlm_args *argp,
432 struct nlm_res *resp)
433{
434 dprintk("lockd: NM_LOCK called\n");
435
436 argp->monitor = 0; /* just clean the monitor flag */
437 return nlmsvc_proc_lock(rqstp, argp, resp);
438}
439
440/*
441 * FREE_ALL: Release all locks and shares held by client
442 */
Al Viro7111c662006-10-19 23:28:45 -0700443static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444nlmsvc_proc_free_all(struct svc_rqst *rqstp, struct nlm_args *argp,
445 void *resp)
446{
447 struct nlm_host *host;
448
449 /* Obtain client */
450 if (nlmsvc_retrieve_args(rqstp, argp, &host, NULL))
451 return rpc_success;
452
453 nlmsvc_free_host_resources(host);
454 nlm_release_host(host);
455 return rpc_success;
456}
457
458/*
459 * SM_NOTIFY: private callback from statd (not part of official NLM proto)
460 */
Al Viro7111c662006-10-19 23:28:45 -0700461static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462nlmsvc_proc_sm_notify(struct svc_rqst *rqstp, struct nlm_reboot *argp,
463 void *resp)
464{
Chuck Lever27459f02007-02-12 00:53:34 -0800465 struct sockaddr_in saddr;
466
467 memcpy(&saddr, svc_addr_in(rqstp), sizeof(saddr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468
469 dprintk("lockd: SM_NOTIFY called\n");
470 if (saddr.sin_addr.s_addr != htonl(INADDR_LOOPBACK)
471 || ntohs(saddr.sin_port) >= 1024) {
Chuck Leverad06e4b2007-02-12 00:53:32 -0800472 char buf[RPC_MAX_ADDRBUFLEN];
473 printk(KERN_WARNING "lockd: rejected NSM callback from %s\n",
474 svc_print_addr(rqstp, buf, sizeof(buf)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 return rpc_system_err;
476 }
477
478 /* Obtain the host pointer for this NFS server and try to
479 * reclaim all locks we hold on this server.
480 */
Olaf Kirchcf712c22006-10-04 02:15:52 -0700481 memset(&saddr, 0, sizeof(saddr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 saddr.sin_addr.s_addr = argp->addr;
Olaf Kirch5c8dd292006-10-04 02:15:55 -0700483 nlm_host_rebooted(&saddr, argp->mon, argp->len, argp->state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484
485 return rpc_success;
486}
487
488/*
489 * client sent a GRANTED_RES, let's remove the associated block
490 */
Al Viro7111c662006-10-19 23:28:45 -0700491static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492nlmsvc_proc_granted_res(struct svc_rqst *rqstp, struct nlm_res *argp,
493 void *resp)
494{
495 if (!nlmsvc_ops)
496 return rpc_success;
497
498 dprintk("lockd: GRANTED_RES called\n");
499
Olaf Kirch39be4502006-10-04 02:16:03 -0700500 nlmsvc_grant_reply(&argp->cookie, argp->status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 return rpc_success;
502}
503
504/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 * NLM Server procedures.
506 */
507
508#define nlmsvc_encode_norep nlmsvc_encode_void
509#define nlmsvc_decode_norep nlmsvc_decode_void
510#define nlmsvc_decode_testres nlmsvc_decode_void
511#define nlmsvc_decode_lockres nlmsvc_decode_void
512#define nlmsvc_decode_unlockres nlmsvc_decode_void
513#define nlmsvc_decode_cancelres nlmsvc_decode_void
514#define nlmsvc_decode_grantedres nlmsvc_decode_void
515
516#define nlmsvc_proc_none nlmsvc_proc_null
517#define nlmsvc_proc_test_res nlmsvc_proc_null
518#define nlmsvc_proc_lock_res nlmsvc_proc_null
519#define nlmsvc_proc_cancel_res nlmsvc_proc_null
520#define nlmsvc_proc_unlock_res nlmsvc_proc_null
521
522struct nlm_void { int dummy; };
523
524#define PROC(name, xargt, xrest, argt, rest, respsize) \
525 { .pc_func = (svc_procfunc) nlmsvc_proc_##name, \
526 .pc_decode = (kxdrproc_t) nlmsvc_decode_##xargt, \
527 .pc_encode = (kxdrproc_t) nlmsvc_encode_##xrest, \
528 .pc_release = NULL, \
529 .pc_argsize = sizeof(struct nlm_##argt), \
530 .pc_ressize = sizeof(struct nlm_##rest), \
531 .pc_xdrressize = respsize, \
532 }
533
534#define Ck (1+XDR_QUADLEN(NLM_MAXCOOKIELEN)) /* cookie */
535#define St 1 /* status */
536#define No (1+1024/4) /* Net Obj */
537#define Rg 2 /* range - offset + size */
538
539struct svc_procedure nlmsvc_procedures[] = {
540 PROC(null, void, void, void, void, 1),
541 PROC(test, testargs, testres, args, res, Ck+St+2+No+Rg),
542 PROC(lock, lockargs, res, args, res, Ck+St),
543 PROC(cancel, cancargs, res, args, res, Ck+St),
544 PROC(unlock, unlockargs, res, args, res, Ck+St),
545 PROC(granted, testargs, res, args, res, Ck+St),
546 PROC(test_msg, testargs, norep, args, void, 1),
547 PROC(lock_msg, lockargs, norep, args, void, 1),
548 PROC(cancel_msg, cancargs, norep, args, void, 1),
549 PROC(unlock_msg, unlockargs, norep, args, void, 1),
550 PROC(granted_msg, testargs, norep, args, void, 1),
551 PROC(test_res, testres, norep, res, void, 1),
552 PROC(lock_res, lockres, norep, res, void, 1),
553 PROC(cancel_res, cancelres, norep, res, void, 1),
554 PROC(unlock_res, unlockres, norep, res, void, 1),
555 PROC(granted_res, res, norep, res, void, 1),
556 /* statd callback */
557 PROC(sm_notify, reboot, void, reboot, void, 1),
558 PROC(none, void, void, void, void, 1),
559 PROC(none, void, void, void, void, 1),
560 PROC(none, void, void, void, void, 1),
561 PROC(share, shareargs, shareres, args, res, Ck+St+1),
562 PROC(unshare, shareargs, shareres, args, res, Ck+St+1),
563 PROC(nm_lock, lockargs, res, args, res, Ck+St),
564 PROC(free_all, notify, void, args, void, 0),
565
566};