Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/lockd/mon.c | |
3 | * | |
4 | * The kernel statd client. | |
5 | * | |
6 | * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de> | |
7 | */ | |
8 | ||
9 | #include <linux/types.h> | |
10 | #include <linux/utsname.h> | |
11 | #include <linux/kernel.h> | |
94da7663 | 12 | #include <linux/ktime.h> |
5a0e3ad6 | 13 | #include <linux/slab.h> |
94da7663 | 14 | |
1da177e4 | 15 | #include <linux/sunrpc/clnt.h> |
0896a725 | 16 | #include <linux/sunrpc/xprtsock.h> |
1da177e4 LT |
17 | #include <linux/sunrpc/svc.h> |
18 | #include <linux/lockd/lockd.h> | |
1da177e4 | 19 | |
ad5b365c MR |
20 | #include <asm/unaligned.h> |
21 | ||
1da177e4 | 22 | #define NLMDBG_FACILITY NLMDBG_MONITOR |
36e8e668 CL |
23 | #define NSM_PROGRAM 100024 |
24 | #define NSM_VERSION 1 | |
25 | ||
26 | enum { | |
27 | NSMPROC_NULL, | |
28 | NSMPROC_STAT, | |
29 | NSMPROC_MON, | |
30 | NSMPROC_UNMON, | |
31 | NSMPROC_UNMON_ALL, | |
32 | NSMPROC_SIMU_CRASH, | |
33 | NSMPROC_NOTIFY, | |
34 | }; | |
1da177e4 | 35 | |
9c1bfd03 | 36 | struct nsm_args { |
cab2d3c9 | 37 | struct nsm_private *priv; |
9c1bfd03 CL |
38 | u32 prog; /* RPC callback info */ |
39 | u32 vers; | |
40 | u32 proc; | |
41 | ||
42 | char *mon_name; | |
43 | }; | |
44 | ||
45 | struct nsm_res { | |
46 | u32 status; | |
47 | u32 state; | |
48 | }; | |
49 | ||
a613fa16 | 50 | static const struct rpc_program nsm_program; |
67c6d107 CL |
51 | static LIST_HEAD(nsm_handles); |
52 | static DEFINE_SPINLOCK(nsm_lock); | |
1da177e4 LT |
53 | |
54 | /* | |
55 | * Local NSM state | |
56 | */ | |
6c9dc425 | 57 | u32 __read_mostly nsm_local_state; |
90ab5ee9 | 58 | bool __read_mostly nsm_use_hostnames; |
1da177e4 | 59 | |
8529bc51 CL |
60 | static inline struct sockaddr *nsm_addr(const struct nsm_handle *nsm) |
61 | { | |
62 | return (struct sockaddr *)&nsm->sm_addr; | |
63 | } | |
64 | ||
0e1cb5c0 | 65 | static struct rpc_clnt *nsm_create(struct net *net) |
49b5699b CL |
66 | { |
67 | struct sockaddr_in sin = { | |
68 | .sin_family = AF_INET, | |
69 | .sin_addr.s_addr = htonl(INADDR_LOOPBACK), | |
70 | }; | |
71 | struct rpc_create_args args = { | |
0e1cb5c0 | 72 | .net = net, |
49b5699b CL |
73 | .protocol = XPRT_TRANSPORT_UDP, |
74 | .address = (struct sockaddr *)&sin, | |
75 | .addrsize = sizeof(sin), | |
76 | .servername = "rpc.statd", | |
77 | .program = &nsm_program, | |
78 | .version = NSM_VERSION, | |
79 | .authflavor = RPC_AUTH_NULL, | |
0e5c2632 | 80 | .flags = RPC_CLNT_CREATE_NOPING, |
49b5699b CL |
81 | }; |
82 | ||
83 | return rpc_create(&args); | |
84 | } | |
85 | ||
0e1cb5c0 SK |
86 | static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res, |
87 | struct net *net) | |
1da177e4 LT |
88 | { |
89 | struct rpc_clnt *clnt; | |
90 | int status; | |
a4846750 | 91 | struct nsm_args args = { |
cab2d3c9 | 92 | .priv = &nsm->sm_priv, |
a4846750 CL |
93 | .prog = NLM_PROGRAM, |
94 | .vers = 3, | |
95 | .proc = NLMPROC_NSM_NOTIFY, | |
29ed1407 | 96 | .mon_name = nsm->sm_mon_name, |
a4846750 | 97 | }; |
dead28da CL |
98 | struct rpc_message msg = { |
99 | .rpc_argp = &args, | |
100 | .rpc_resp = res, | |
101 | }; | |
1da177e4 | 102 | |
0e1cb5c0 | 103 | clnt = nsm_create(net); |
1da177e4 LT |
104 | if (IS_ERR(clnt)) { |
105 | status = PTR_ERR(clnt); | |
5acf4315 CL |
106 | dprintk("lockd: failed to create NSM upcall transport, " |
107 | "status=%d\n", status); | |
1da177e4 LT |
108 | goto out; |
109 | } | |
110 | ||
1da177e4 LT |
111 | memset(res, 0, sizeof(*res)); |
112 | ||
dead28da CL |
113 | msg.rpc_proc = &clnt->cl_procinfo[proc]; |
114 | status = rpc_call_sync(clnt, &msg, 0); | |
1da177e4 | 115 | if (status < 0) |
5acf4315 CL |
116 | dprintk("lockd: NSM upcall RPC failed, status=%d\n", |
117 | status); | |
1da177e4 LT |
118 | else |
119 | status = 0; | |
90c5755f | 120 | rpc_shutdown_client(clnt); |
1da177e4 LT |
121 | out: |
122 | return status; | |
123 | } | |
124 | ||
1e49323c CL |
125 | /** |
126 | * nsm_monitor - Notify a peer in case we reboot | |
127 | * @host: pointer to nlm_host of peer to notify | |
128 | * | |
129 | * If this peer is not already monitored, this function sends an | |
130 | * upcall to the local rpc.statd to record the name/address of | |
131 | * the peer to notify in case we reboot. | |
132 | * | |
133 | * Returns zero if the peer is monitored by the local rpc.statd; | |
134 | * otherwise a negative errno value is returned. | |
1da177e4 | 135 | */ |
1e49323c | 136 | int nsm_monitor(const struct nlm_host *host) |
1da177e4 | 137 | { |
8dead0db | 138 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 LT |
139 | struct nsm_res res; |
140 | int status; | |
141 | ||
9fee4902 | 142 | dprintk("lockd: nsm_monitor(%s)\n", nsm->sm_name); |
8dead0db OK |
143 | |
144 | if (nsm->sm_monitored) | |
977faf39 | 145 | return 0; |
1da177e4 | 146 | |
29ed1407 CL |
147 | /* |
148 | * Choose whether to record the caller_name or IP address of | |
149 | * this peer in the local rpc.statd's database. | |
150 | */ | |
151 | nsm->sm_mon_name = nsm_use_hostnames ? nsm->sm_name : nsm->sm_addrbuf; | |
152 | ||
0e1cb5c0 | 153 | status = nsm_mon_unmon(nsm, NSMPROC_MON, &res, host->net); |
6c9dc425 | 154 | if (unlikely(res.status != 0)) |
5d254b11 | 155 | status = -EIO; |
6c9dc425 | 156 | if (unlikely(status < 0)) { |
9fee4902 | 157 | printk(KERN_NOTICE "lockd: cannot monitor %s\n", nsm->sm_name); |
6c9dc425 CL |
158 | return status; |
159 | } | |
160 | ||
161 | nsm->sm_monitored = 1; | |
162 | if (unlikely(nsm_local_state != res.state)) { | |
163 | nsm_local_state = res.state; | |
164 | dprintk("lockd: NSM state changed to %d\n", nsm_local_state); | |
165 | } | |
166 | return 0; | |
1da177e4 LT |
167 | } |
168 | ||
356c3eb4 CL |
169 | /** |
170 | * nsm_unmonitor - Unregister peer notification | |
171 | * @host: pointer to nlm_host of peer to stop monitoring | |
172 | * | |
173 | * If this peer is monitored, this function sends an upcall to | |
174 | * tell the local rpc.statd not to send this peer a notification | |
175 | * when we reboot. | |
1da177e4 | 176 | */ |
356c3eb4 | 177 | void nsm_unmonitor(const struct nlm_host *host) |
1da177e4 | 178 | { |
8dead0db | 179 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 | 180 | struct nsm_res res; |
356c3eb4 | 181 | int status; |
1da177e4 | 182 | |
9502c522 OK |
183 | if (atomic_read(&nsm->sm_count) == 1 |
184 | && nsm->sm_monitored && !nsm->sm_sticky) { | |
9fee4902 | 185 | dprintk("lockd: nsm_unmonitor(%s)\n", nsm->sm_name); |
9502c522 | 186 | |
0e1cb5c0 | 187 | status = nsm_mon_unmon(nsm, NSMPROC_UNMON, &res, host->net); |
0c7aef45 CL |
188 | if (res.status != 0) |
189 | status = -EIO; | |
977faf39 | 190 | if (status < 0) |
9502c522 | 191 | printk(KERN_NOTICE "lockd: cannot unmonitor %s\n", |
9fee4902 | 192 | nsm->sm_name); |
9502c522 OK |
193 | else |
194 | nsm->sm_monitored = 0; | |
977faf39 | 195 | } |
1da177e4 LT |
196 | } |
197 | ||
3420a8c4 CL |
198 | static struct nsm_handle *nsm_lookup_hostname(const char *hostname, |
199 | const size_t len) | |
200 | { | |
201 | struct nsm_handle *nsm; | |
202 | ||
203 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
204 | if (strlen(nsm->sm_name) == len && | |
205 | memcmp(nsm->sm_name, hostname, len) == 0) | |
206 | return nsm; | |
207 | return NULL; | |
208 | } | |
209 | ||
77a3ef33 CL |
210 | static struct nsm_handle *nsm_lookup_addr(const struct sockaddr *sap) |
211 | { | |
212 | struct nsm_handle *nsm; | |
213 | ||
214 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
4516fc04 | 215 | if (rpc_cmp_addr(nsm_addr(nsm), sap)) |
77a3ef33 CL |
216 | return nsm; |
217 | return NULL; | |
218 | } | |
219 | ||
3420a8c4 CL |
220 | static struct nsm_handle *nsm_lookup_priv(const struct nsm_private *priv) |
221 | { | |
222 | struct nsm_handle *nsm; | |
223 | ||
224 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
225 | if (memcmp(nsm->sm_priv.data, priv->data, | |
226 | sizeof(priv->data)) == 0) | |
227 | return nsm; | |
228 | return NULL; | |
229 | } | |
230 | ||
7e44d3be CL |
231 | /* |
232 | * Construct a unique cookie to match this nsm_handle to this monitored | |
233 | * host. It is passed to the local rpc.statd via NSMPROC_MON, and | |
234 | * returned via NLMPROC_SM_NOTIFY, in the "priv" field of these | |
235 | * requests. | |
236 | * | |
94da7663 CL |
237 | * The NSM protocol requires that these cookies be unique while the |
238 | * system is running. We prefer a stronger requirement of making them | |
239 | * unique across reboots. If user space bugs cause a stale cookie to | |
240 | * be sent to the kernel, it could cause the wrong host to lose its | |
241 | * lock state if cookies were not unique across reboots. | |
242 | * | |
243 | * The cookies are exposed only to local user space via loopback. They | |
244 | * do not appear on the physical network. If we want greater security | |
245 | * for some reason, nsm_init_private() could perform a one-way hash to | |
246 | * obscure the contents of the cookie. | |
7e44d3be CL |
247 | */ |
248 | static void nsm_init_private(struct nsm_handle *nsm) | |
249 | { | |
94da7663 CL |
250 | u64 *p = (u64 *)&nsm->sm_priv.data; |
251 | struct timespec ts; | |
ad5b365c | 252 | s64 ns; |
94da7663 CL |
253 | |
254 | ktime_get_ts(&ts); | |
ad5b365c MR |
255 | ns = timespec_to_ns(&ts); |
256 | put_unaligned(ns, p); | |
257 | put_unaligned((unsigned long)nsm, p + 1); | |
7e44d3be CL |
258 | } |
259 | ||
b39b897c CL |
260 | static struct nsm_handle *nsm_create_handle(const struct sockaddr *sap, |
261 | const size_t salen, | |
262 | const char *hostname, | |
263 | const size_t hostname_len) | |
264 | { | |
265 | struct nsm_handle *new; | |
266 | ||
267 | new = kzalloc(sizeof(*new) + hostname_len + 1, GFP_KERNEL); | |
268 | if (unlikely(new == NULL)) | |
269 | return NULL; | |
270 | ||
271 | atomic_set(&new->sm_count, 1); | |
272 | new->sm_name = (char *)(new + 1); | |
273 | memcpy(nsm_addr(new), sap, salen); | |
274 | new->sm_addrlen = salen; | |
275 | nsm_init_private(new); | |
c15128c5 CL |
276 | |
277 | if (rpc_ntop(nsm_addr(new), new->sm_addrbuf, | |
278 | sizeof(new->sm_addrbuf)) == 0) | |
279 | (void)snprintf(new->sm_addrbuf, sizeof(new->sm_addrbuf), | |
280 | "unsupported address family"); | |
b39b897c CL |
281 | memcpy(new->sm_name, hostname, hostname_len); |
282 | new->sm_name[hostname_len] = '\0'; | |
283 | ||
284 | return new; | |
285 | } | |
286 | ||
67c6d107 | 287 | /** |
92fd91b9 | 288 | * nsm_get_handle - Find or create a cached nsm_handle |
67c6d107 CL |
289 | * @sap: pointer to socket address of handle to find |
290 | * @salen: length of socket address | |
291 | * @hostname: pointer to C string containing hostname to find | |
292 | * @hostname_len: length of C string | |
67c6d107 | 293 | * |
92fd91b9 | 294 | * Behavior is modulated by the global nsm_use_hostnames variable. |
67c6d107 | 295 | * |
92fd91b9 CL |
296 | * Returns a cached nsm_handle after bumping its ref count, or |
297 | * returns a fresh nsm_handle if a handle that matches @sap and/or | |
298 | * @hostname cannot be found in the handle cache. Returns NULL if | |
299 | * an error occurs. | |
67c6d107 | 300 | */ |
92fd91b9 CL |
301 | struct nsm_handle *nsm_get_handle(const struct sockaddr *sap, |
302 | const size_t salen, const char *hostname, | |
303 | const size_t hostname_len) | |
67c6d107 | 304 | { |
77a3ef33 | 305 | struct nsm_handle *cached, *new = NULL; |
67c6d107 | 306 | |
67c6d107 CL |
307 | if (hostname && memchr(hostname, '/', hostname_len) != NULL) { |
308 | if (printk_ratelimit()) { | |
309 | printk(KERN_WARNING "Invalid hostname \"%.*s\" " | |
310 | "in NFS lock request\n", | |
311 | (int)hostname_len, hostname); | |
312 | } | |
313 | return NULL; | |
314 | } | |
315 | ||
316 | retry: | |
317 | spin_lock(&nsm_lock); | |
77a3ef33 CL |
318 | |
319 | if (nsm_use_hostnames && hostname != NULL) | |
320 | cached = nsm_lookup_hostname(hostname, hostname_len); | |
321 | else | |
322 | cached = nsm_lookup_addr(sap); | |
323 | ||
324 | if (cached != NULL) { | |
325 | atomic_inc(&cached->sm_count); | |
326 | spin_unlock(&nsm_lock); | |
327 | kfree(new); | |
328 | dprintk("lockd: found nsm_handle for %s (%s), " | |
329 | "cnt %d\n", cached->sm_name, | |
330 | cached->sm_addrbuf, | |
331 | atomic_read(&cached->sm_count)); | |
332 | return cached; | |
67c6d107 | 333 | } |
77a3ef33 CL |
334 | |
335 | if (new != NULL) { | |
336 | list_add(&new->sm_link, &nsm_handles); | |
337 | spin_unlock(&nsm_lock); | |
5cf1c4b1 | 338 | dprintk("lockd: created nsm_handle for %s (%s)\n", |
77a3ef33 CL |
339 | new->sm_name, new->sm_addrbuf); |
340 | return new; | |
67c6d107 | 341 | } |
77a3ef33 | 342 | |
67c6d107 CL |
343 | spin_unlock(&nsm_lock); |
344 | ||
77a3ef33 CL |
345 | new = nsm_create_handle(sap, salen, hostname, hostname_len); |
346 | if (unlikely(new == NULL)) | |
67c6d107 | 347 | return NULL; |
67c6d107 | 348 | goto retry; |
67c6d107 CL |
349 | } |
350 | ||
3420a8c4 CL |
351 | /** |
352 | * nsm_reboot_lookup - match NLMPROC_SM_NOTIFY arguments to an nsm_handle | |
353 | * @info: pointer to NLMPROC_SM_NOTIFY arguments | |
354 | * | |
7e469af9 JL |
355 | * Returns a matching nsm_handle if found in the nsm cache. The returned |
356 | * nsm_handle's reference count is bumped. Otherwise returns NULL if some | |
357 | * error occurred. | |
3420a8c4 CL |
358 | */ |
359 | struct nsm_handle *nsm_reboot_lookup(const struct nlm_reboot *info) | |
360 | { | |
361 | struct nsm_handle *cached; | |
362 | ||
363 | spin_lock(&nsm_lock); | |
364 | ||
94da7663 | 365 | cached = nsm_lookup_priv(&info->priv); |
3420a8c4 CL |
366 | if (unlikely(cached == NULL)) { |
367 | spin_unlock(&nsm_lock); | |
368 | dprintk("lockd: never saw rebooted peer '%.*s' before\n", | |
369 | info->len, info->mon); | |
370 | return cached; | |
371 | } | |
372 | ||
373 | atomic_inc(&cached->sm_count); | |
374 | spin_unlock(&nsm_lock); | |
375 | ||
3420a8c4 CL |
376 | dprintk("lockd: host %s (%s) rebooted, cnt %d\n", |
377 | cached->sm_name, cached->sm_addrbuf, | |
378 | atomic_read(&cached->sm_count)); | |
379 | return cached; | |
380 | } | |
381 | ||
67c6d107 CL |
382 | /** |
383 | * nsm_release - Release an NSM handle | |
384 | * @nsm: pointer to handle to be released | |
385 | * | |
386 | */ | |
387 | void nsm_release(struct nsm_handle *nsm) | |
388 | { | |
67c6d107 CL |
389 | if (atomic_dec_and_lock(&nsm->sm_count, &nsm_lock)) { |
390 | list_del(&nsm->sm_link); | |
391 | spin_unlock(&nsm_lock); | |
5cf1c4b1 CL |
392 | dprintk("lockd: destroyed nsm_handle for %s (%s)\n", |
393 | nsm->sm_name, nsm->sm_addrbuf); | |
67c6d107 CL |
394 | kfree(nsm); |
395 | } | |
396 | } | |
397 | ||
1da177e4 LT |
398 | /* |
399 | * XDR functions for NSM. | |
2ca7754d CL |
400 | * |
401 | * See http://www.opengroup.org/ for details on the Network | |
402 | * Status Monitor wire protocol. | |
1da177e4 LT |
403 | */ |
404 | ||
49b17004 | 405 | static void encode_nsm_string(struct xdr_stream *xdr, const char *string) |
099bd05f | 406 | { |
03eb1dcb CL |
407 | const u32 len = strlen(string); |
408 | __be32 *p; | |
409 | ||
49b17004 CL |
410 | BUG_ON(len > SM_MAXSTRLEN); |
411 | p = xdr_reserve_space(xdr, 4 + len); | |
03eb1dcb | 412 | xdr_encode_opaque(p, string, len); |
099bd05f CL |
413 | } |
414 | ||
49695174 CL |
415 | /* |
416 | * "mon_name" specifies the host to be monitored. | |
49695174 | 417 | */ |
49b17004 | 418 | static void encode_mon_name(struct xdr_stream *xdr, const struct nsm_args *argp) |
49695174 | 419 | { |
49b17004 | 420 | encode_nsm_string(xdr, argp->mon_name); |
49695174 CL |
421 | } |
422 | ||
850c95fd CL |
423 | /* |
424 | * The "my_id" argument specifies the hostname and RPC procedure | |
425 | * to be called when the status manager receives notification | |
36e8e668 | 426 | * (via the NLMPROC_SM_NOTIFY call) that the state of host "mon_name" |
850c95fd CL |
427 | * has changed. |
428 | */ | |
49b17004 | 429 | static void encode_my_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
850c95fd | 430 | { |
03eb1dcb CL |
431 | __be32 *p; |
432 | ||
49b17004 CL |
433 | encode_nsm_string(xdr, utsname()->nodename); |
434 | p = xdr_reserve_space(xdr, 4 + 4 + 4); | |
435 | *p++ = cpu_to_be32(argp->prog); | |
436 | *p++ = cpu_to_be32(argp->vers); | |
437 | *p = cpu_to_be32(argp->proc); | |
850c95fd CL |
438 | } |
439 | ||
ea72a7f1 CL |
440 | /* |
441 | * The "mon_id" argument specifies the non-private arguments | |
36e8e668 | 442 | * of an NSMPROC_MON or NSMPROC_UNMON call. |
ea72a7f1 | 443 | */ |
49b17004 | 444 | static void encode_mon_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
ea72a7f1 | 445 | { |
49b17004 CL |
446 | encode_mon_name(xdr, argp); |
447 | encode_my_id(xdr, argp); | |
ea72a7f1 CL |
448 | } |
449 | ||
0490a54a CL |
450 | /* |
451 | * The "priv" argument may contain private information required | |
36e8e668 CL |
452 | * by the NSMPROC_MON call. This information will be supplied in the |
453 | * NLMPROC_SM_NOTIFY call. | |
0490a54a | 454 | */ |
49b17004 | 455 | static void encode_priv(struct xdr_stream *xdr, const struct nsm_args *argp) |
0490a54a | 456 | { |
03eb1dcb CL |
457 | __be32 *p; |
458 | ||
459 | p = xdr_reserve_space(xdr, SM_PRIV_SIZE); | |
cab2d3c9 | 460 | xdr_encode_opaque_fixed(p, argp->priv->data, SM_PRIV_SIZE); |
0490a54a CL |
461 | } |
462 | ||
9f06c719 CL |
463 | static void nsm_xdr_enc_mon(struct rpc_rqst *req, struct xdr_stream *xdr, |
464 | const struct nsm_args *argp) | |
1da177e4 | 465 | { |
9f06c719 CL |
466 | encode_mon_id(xdr, argp); |
467 | encode_priv(xdr, argp); | |
1da177e4 LT |
468 | } |
469 | ||
9f06c719 CL |
470 | static void nsm_xdr_enc_unmon(struct rpc_rqst *req, struct xdr_stream *xdr, |
471 | const struct nsm_args *argp) | |
1da177e4 | 472 | { |
9f06c719 | 473 | encode_mon_id(xdr, argp); |
1da177e4 LT |
474 | } |
475 | ||
bf269551 CL |
476 | static int nsm_xdr_dec_stat_res(struct rpc_rqst *rqstp, |
477 | struct xdr_stream *xdr, | |
478 | struct nsm_res *resp) | |
1da177e4 | 479 | { |
bf269551 | 480 | __be32 *p; |
03eb1dcb | 481 | |
bf269551 | 482 | p = xdr_inline_decode(xdr, 4 + 4); |
03eb1dcb CL |
483 | if (unlikely(p == NULL)) |
484 | return -EIO; | |
49b17004 CL |
485 | resp->status = be32_to_cpup(p++); |
486 | resp->state = be32_to_cpup(p); | |
03eb1dcb | 487 | |
bf269551 CL |
488 | dprintk("lockd: %s status %d state %d\n", |
489 | __func__, resp->status, resp->state); | |
1da177e4 LT |
490 | return 0; |
491 | } | |
492 | ||
bf269551 CL |
493 | static int nsm_xdr_dec_stat(struct rpc_rqst *rqstp, |
494 | struct xdr_stream *xdr, | |
495 | struct nsm_res *resp) | |
1da177e4 | 496 | { |
bf269551 | 497 | __be32 *p; |
03eb1dcb | 498 | |
bf269551 | 499 | p = xdr_inline_decode(xdr, 4); |
03eb1dcb CL |
500 | if (unlikely(p == NULL)) |
501 | return -EIO; | |
49b17004 | 502 | resp->state = be32_to_cpup(p); |
03eb1dcb | 503 | |
bf269551 | 504 | dprintk("lockd: %s state %d\n", __func__, resp->state); |
1da177e4 LT |
505 | return 0; |
506 | } | |
507 | ||
508 | #define SM_my_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN)) | |
2ca7754d CL |
509 | #define SM_my_id_sz (SM_my_name_sz+3) |
510 | #define SM_mon_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN)) | |
511 | #define SM_mon_id_sz (SM_mon_name_sz+SM_my_id_sz) | |
0490a54a CL |
512 | #define SM_priv_sz (XDR_QUADLEN(SM_PRIV_SIZE)) |
513 | #define SM_mon_sz (SM_mon_id_sz+SM_priv_sz) | |
1da177e4 LT |
514 | #define SM_monres_sz 2 |
515 | #define SM_unmonres_sz 1 | |
516 | ||
1da177e4 | 517 | static struct rpc_procinfo nsm_procedures[] = { |
36e8e668 CL |
518 | [NSMPROC_MON] = { |
519 | .p_proc = NSMPROC_MON, | |
9f06c719 | 520 | .p_encode = (kxdreproc_t)nsm_xdr_enc_mon, |
bf269551 | 521 | .p_decode = (kxdrdproc_t)nsm_xdr_dec_stat_res, |
2bea90d4 CL |
522 | .p_arglen = SM_mon_sz, |
523 | .p_replen = SM_monres_sz, | |
36e8e668 | 524 | .p_statidx = NSMPROC_MON, |
cc0175c1 | 525 | .p_name = "MONITOR", |
1da177e4 | 526 | }, |
36e8e668 CL |
527 | [NSMPROC_UNMON] = { |
528 | .p_proc = NSMPROC_UNMON, | |
9f06c719 | 529 | .p_encode = (kxdreproc_t)nsm_xdr_enc_unmon, |
bf269551 | 530 | .p_decode = (kxdrdproc_t)nsm_xdr_dec_stat, |
2bea90d4 CL |
531 | .p_arglen = SM_mon_id_sz, |
532 | .p_replen = SM_unmonres_sz, | |
36e8e668 | 533 | .p_statidx = NSMPROC_UNMON, |
cc0175c1 | 534 | .p_name = "UNMONITOR", |
1da177e4 LT |
535 | }, |
536 | }; | |
537 | ||
a613fa16 | 538 | static const struct rpc_version nsm_version1 = { |
e8c96f8c TK |
539 | .number = 1, |
540 | .nrprocs = ARRAY_SIZE(nsm_procedures), | |
1da177e4 LT |
541 | .procs = nsm_procedures |
542 | }; | |
543 | ||
a613fa16 | 544 | static const struct rpc_version *nsm_version[] = { |
1da177e4 LT |
545 | [1] = &nsm_version1, |
546 | }; | |
547 | ||
548 | static struct rpc_stat nsm_stats; | |
549 | ||
a613fa16 | 550 | static const struct rpc_program nsm_program = { |
1da177e4 | 551 | .name = "statd", |
36e8e668 | 552 | .number = NSM_PROGRAM, |
e8c96f8c | 553 | .nrvers = ARRAY_SIZE(nsm_version), |
1da177e4 LT |
554 | .version = nsm_version, |
555 | .stats = &nsm_stats | |
556 | }; |