blob: fb26b9f522e74df4529b59c55b02502284f37dbc [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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/lockd/lockd.h>
13#include <linux/lockd/share.h>
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +040014#include <linux/sunrpc/svc_xprt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015
16#define NLMDBG_FACILITY NLMDBG_CLIENT
17
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#ifdef CONFIG_LOCKD_V4
Al Viro52921e02006-10-19 23:28:46 -070019static __be32
20cast_to_nlm(__be32 status, u32 vers)
Linus Torvalds1da177e2005-04-16 15:20:36 -070021{
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:
Marc Eshel5ea0d752006-11-28 16:27:06 -050030 case nlm_drop_reply:
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 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 */
Al Viro52921e02006-10-19 23:28:46 -070050static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -070051nlmsvc_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;
Al Viro52921e02006-10-19 23:28:46 -070057 __be32 error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
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 */
Olaf Kirchdb4e4c92006-10-04 02:15:52 -070064 if (!(host = nlmsvc_lookup_host(rqstp, lock->caller, lock->len))
Olaf Kirch977faf32006-10-04 02:15:51 -070065 || (argp->monitor && nsm_monitor(host) < 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 goto no_locks;
67 *hostp = host;
68
69 /* Obtain file pointer. Not used by FREE_ALL call. */
70 if (filp != NULL) {
Trond Myklebustcd0b16c2012-10-13 00:30:28 -040071 error = cast_status(nlm_lookup_file(rqstp, &file, &lock->fh));
72 if (error != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 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:
Chuck Lever67216b92010-12-14 15:06:12 +000085 nlmsvc_release_host(host);
NeilBrownd343fce2006-10-17 00:10:18 -070086 if (error)
87 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 return nlm_lck_denied_nolocks;
89}
90
91/*
92 * NULL: Test for presence of service
93 */
Al Viro7111c662006-10-19 23:28:45 -070094static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -070095nlmsvc_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 */
Al Viro7111c662006-10-19 23:28:45 -0700104static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105nlmsvc_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;
Harvey Harrison317602f2008-07-20 23:41:24 -0700110 __be32 rc = rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
112 dprintk("lockd: TEST called\n");
113 resp->cookie = argp->cookie;
114
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 /* Obtain client and file */
116 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
NeilBrownd343fce2006-10-17 00:10:18 -0700117 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118
119 /* Now check for conflicting locks */
Jeff Layton8f920d52008-07-15 14:06:48 -0400120 resp->status = cast_status(nlmsvc_testlock(rqstp, file, host, &argp->lock, &resp->lock, &resp->cookie));
Marc Eshel5ea0d752006-11-28 16:27:06 -0500121 if (resp->status == nlm_drop_reply)
Oleg Drokinb7e6b862007-11-26 13:35:11 -0500122 rc = rpc_drop_reply;
123 else
124 dprintk("lockd: TEST status %d vers %d\n",
125 ntohl(resp->status), rqstp->rq_vers);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
Chuck Lever67216b92010-12-14 15:06:12 +0000127 nlmsvc_release_host(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 nlm_release_file(file);
Oleg Drokinb7e6b862007-11-26 13:35:11 -0500129 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130}
131
Al Viro7111c662006-10-19 23:28:45 -0700132static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133nlmsvc_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;
Harvey Harrison317602f2008-07-20 23:41:24 -0700138 __be32 rc = rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
140 dprintk("lockd: LOCK called\n");
141
142 resp->cookie = argp->cookie;
143
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 /* Obtain client and file */
145 if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
NeilBrownd343fce2006-10-17 00:10:18 -0700146 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147
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 */
Jeff Layton6cde4de2008-07-15 14:26:17 -0400161 resp->status = cast_status(nlmsvc_lock(rqstp, file, host, &argp->lock,
J. Bruce Fieldsb2b50282008-02-06 13:59:23 -0500162 argp->block, &argp->cookie,
163 argp->reclaim));
Marc Eshel1a8322b2006-11-28 16:27:06 -0500164 if (resp->status == nlm_drop_reply)
Oleg Drokinb7e6b862007-11-26 13:35:11 -0500165 rc = rpc_drop_reply;
166 else
167 dprintk("lockd: LOCK status %d\n", ntohl(resp->status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
Chuck Lever67216b92010-12-14 15:06:12 +0000169 nlmsvc_release_host(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 nlm_release_file(file);
Oleg Drokinb7e6b862007-11-26 13:35:11 -0500171 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172}
173
Al Viro7111c662006-10-19 23:28:45 -0700174static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175nlmsvc_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;
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +0400180 struct net *net = SVC_NET(rqstp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
182 dprintk("lockd: CANCEL called\n");
183
184 resp->cookie = argp->cookie;
185
186 /* Don't accept requests during grace period */
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +0400187 if (locks_in_grace(net)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 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)))
NeilBrownd343fce2006-10-17 00:10:18 -0700194 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
196 /* Try to cancel request. */
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +0400197 resp->status = cast_status(nlmsvc_cancel_blocked(net, file, &argp->lock));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
199 dprintk("lockd: CANCEL status %d\n", ntohl(resp->status));
Chuck Lever67216b92010-12-14 15:06:12 +0000200 nlmsvc_release_host(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 nlm_release_file(file);
202 return rpc_success;
203}
204
205/*
206 * UNLOCK: release a lock
207 */
Al Viro7111c662006-10-19 23:28:45 -0700208static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209nlmsvc_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;
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +0400214 struct net *net = SVC_NET(rqstp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
216 dprintk("lockd: UNLOCK called\n");
217
218 resp->cookie = argp->cookie;
219
220 /* Don't accept new lock requests during grace period */
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +0400221 if (locks_in_grace(net)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 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)))
NeilBrownd343fce2006-10-17 00:10:18 -0700228 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
230 /* Now try to remove the lock */
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +0400231 resp->status = cast_status(nlmsvc_unlock(net, file, &argp->lock));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
233 dprintk("lockd: UNLOCK status %d\n", ntohl(resp->status));
Chuck Lever67216b92010-12-14 15:06:12 +0000234 nlmsvc_release_host(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 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 */
Al Viro7111c662006-10-19 23:28:45 -0700243static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244nlmsvc_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");
Chuck Leverdcff09f2008-10-03 12:50:36 -0400250 resp->status = nlmclnt_grant(svc_addr(rqstp), &argp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 dprintk("lockd: GRANTED status %d\n", ntohl(resp->status));
252 return rpc_success;
253}
254
255/*
Trond Myklebustd4716622006-03-20 13:44:45 -0500256 * This is the generic lockd callback for async RPC calls
257 */
258static void nlmsvc_callback_exit(struct rpc_task *task, void *data)
259{
Chuck Leverc041b5f2006-12-05 16:36:03 -0500260 dprintk("lockd: %5u callback returned %d\n", task->tk_pid,
Trond Myklebustd4716622006-03-20 13:44:45 -0500261 -task->tk_status);
262}
263
Chuck Lever7db836d2010-12-14 15:05:42 +0000264void nlmsvc_release_call(struct nlm_rqst *call)
265{
266 if (!atomic_dec_and_test(&call->a_count))
267 return;
Chuck Lever67216b92010-12-14 15:06:12 +0000268 nlmsvc_release_host(call->a_host);
Chuck Lever7db836d2010-12-14 15:05:42 +0000269 kfree(call);
270}
271
Trond Myklebustd4716622006-03-20 13:44:45 -0500272static void nlmsvc_callback_release(void *data)
273{
Chuck Lever7db836d2010-12-14 15:05:42 +0000274 nlmsvc_release_call(data);
Trond Myklebustd4716622006-03-20 13:44:45 -0500275}
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/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 * `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 */
Al Viro7111c662006-10-19 23:28:45 -0700287static __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 *))
Trond Myklebustd4716622006-03-20 13:44:45 -0500289{
290 struct nlm_host *host;
291 struct nlm_rqst *call;
Al Viro7111c662006-10-19 23:28:45 -0700292 __be32 stat;
Trond Myklebustd4716622006-03-20 13:44:45 -0500293
Olaf Kirchdb4e4c92006-10-04 02:15:52 -0700294 host = nlmsvc_lookup_host(rqstp,
295 argp->lock.caller,
296 argp->lock.len);
Trond Myklebustd4716622006-03-20 13:44:45 -0500297 if (host == NULL)
298 return rpc_system_err;
299
300 call = nlm_alloc_call(host);
Al Viro446945a2012-07-26 00:39:50 +0400301 nlmsvc_release_host(host);
Trond Myklebustd4716622006-03-20 13:44:45 -0500302 if (call == NULL)
303 return rpc_system_err;
304
305 stat = func(rqstp, argp, &call->a_res);
306 if (stat != 0) {
Chuck Lever7db836d2010-12-14 15:05:42 +0000307 nlmsvc_release_call(call);
Trond Myklebustd4716622006-03-20 13:44:45 -0500308 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
Al Viro7111c662006-10-19 23:28:45 -0700317static __be32 nlmsvc_proc_test_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 void *resp)
319{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 dprintk("lockd: TEST_MSG called\n");
Trond Myklebustd4716622006-03-20 13:44:45 -0500321 return nlmsvc_callback(rqstp, NLMPROC_TEST_RES, argp, nlmsvc_proc_test);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322}
323
Al Viro7111c662006-10-19 23:28:45 -0700324static __be32 nlmsvc_proc_lock_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: LOCK_MSG called\n");
Trond Myklebustd4716622006-03-20 13:44:45 -0500328 return nlmsvc_callback(rqstp, NLMPROC_LOCK_RES, argp, nlmsvc_proc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329}
330
Al Viro7111c662006-10-19 23:28:45 -0700331static __be32 nlmsvc_proc_cancel_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: CANCEL_MSG called\n");
Trond Myklebustd4716622006-03-20 13:44:45 -0500335 return nlmsvc_callback(rqstp, NLMPROC_CANCEL_RES, argp, nlmsvc_proc_cancel);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336}
337
Al Viro7111c662006-10-19 23:28:45 -0700338static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339nlmsvc_proc_unlock_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
340 void *resp)
341{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 dprintk("lockd: UNLOCK_MSG called\n");
Trond Myklebustd4716622006-03-20 13:44:45 -0500343 return nlmsvc_callback(rqstp, NLMPROC_UNLOCK_RES, argp, nlmsvc_proc_unlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344}
345
Al Viro7111c662006-10-19 23:28:45 -0700346static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347nlmsvc_proc_granted_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
348 void *resp)
349{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 dprintk("lockd: GRANTED_MSG called\n");
Trond Myklebustd4716622006-03-20 13:44:45 -0500351 return nlmsvc_callback(rqstp, NLMPROC_GRANTED_RES, argp, nlmsvc_proc_granted);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352}
353
354/*
355 * SHARE: create a DOS share or alter existing share.
356 */
Al Viro7111c662006-10-19 23:28:45 -0700357static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358nlmsvc_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 */
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +0400369 if (locks_in_grace(SVC_NET(rqstp)) && !argp->reclaim) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 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)))
NeilBrownd343fce2006-10-17 00:10:18 -0700376 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
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));
Chuck Lever67216b92010-12-14 15:06:12 +0000382 nlmsvc_release_host(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 nlm_release_file(file);
384 return rpc_success;
385}
386
387/*
388 * UNSHARE: Release a DOS share.
389 */
Al Viro7111c662006-10-19 23:28:45 -0700390static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391nlmsvc_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 */
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +0400402 if (locks_in_grace(SVC_NET(rqstp))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 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)))
NeilBrownd343fce2006-10-17 00:10:18 -0700409 return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410
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));
Chuck Lever67216b92010-12-14 15:06:12 +0000415 nlmsvc_release_host(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 nlm_release_file(file);
417 return rpc_success;
418}
419
420/*
421 * NM_LOCK: Create an unmonitored lock
422 */
Al Viro7111c662006-10-19 23:28:45 -0700423static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424nlmsvc_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 */
Al Viro7111c662006-10-19 23:28:45 -0700436static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437nlmsvc_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);
Chuck Lever67216b92010-12-14 15:06:12 +0000447 nlmsvc_release_host(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 return rpc_success;
449}
450
451/*
452 * SM_NOTIFY: private callback from statd (not part of official NLM proto)
453 */
Al Viro7111c662006-10-19 23:28:45 -0700454static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455nlmsvc_proc_sm_notify(struct svc_rqst *rqstp, struct nlm_reboot *argp,
456 void *resp)
457{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 dprintk("lockd: SM_NOTIFY called\n");
Chuck Leverb85e4672008-10-03 12:50:44 -0400459
460 if (!nlm_privileged_requester(rqstp)) {
Chuck Leverad06e4b2007-02-12 00:53:32 -0800461 char buf[RPC_MAX_ADDRBUFLEN];
462 printk(KERN_WARNING "lockd: rejected NSM callback from %s\n",
463 svc_print_addr(rqstp, buf, sizeof(buf)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 return rpc_system_err;
465 }
466
Andrey Ryabinin0ad95472015-09-23 15:49:29 +0300467 nlm_host_rebooted(SVC_NET(rqstp), argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 return rpc_success;
469}
470
471/*
472 * client sent a GRANTED_RES, let's remove the associated block
473 */
Al Viro7111c662006-10-19 23:28:45 -0700474static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475nlmsvc_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
Olaf Kirch39be4502006-10-04 02:16:03 -0700483 nlmsvc_grant_reply(&argp->cookie, argp->status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 return rpc_success;
485}
486
487/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 * 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};