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Commit | Line | Data |
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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 | ||
1da177e4 | 50 | static 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; |
b7ba597f | 58 | int __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 | ||
49b5699b CL |
65 | static struct rpc_clnt *nsm_create(void) |
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 = { | |
72 | .protocol = XPRT_TRANSPORT_UDP, | |
73 | .address = (struct sockaddr *)&sin, | |
74 | .addrsize = sizeof(sin), | |
75 | .servername = "rpc.statd", | |
76 | .program = &nsm_program, | |
77 | .version = NSM_VERSION, | |
78 | .authflavor = RPC_AUTH_NULL, | |
0e5c2632 | 79 | .flags = RPC_CLNT_CREATE_NOPING, |
49b5699b CL |
80 | }; |
81 | ||
82 | return rpc_create(&args); | |
83 | } | |
84 | ||
85 | static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res) | |
1da177e4 LT |
86 | { |
87 | struct rpc_clnt *clnt; | |
88 | int status; | |
a4846750 | 89 | struct nsm_args args = { |
cab2d3c9 | 90 | .priv = &nsm->sm_priv, |
a4846750 CL |
91 | .prog = NLM_PROGRAM, |
92 | .vers = 3, | |
93 | .proc = NLMPROC_NSM_NOTIFY, | |
29ed1407 | 94 | .mon_name = nsm->sm_mon_name, |
a4846750 | 95 | }; |
dead28da CL |
96 | struct rpc_message msg = { |
97 | .rpc_argp = &args, | |
98 | .rpc_resp = res, | |
99 | }; | |
1da177e4 LT |
100 | |
101 | clnt = nsm_create(); | |
102 | if (IS_ERR(clnt)) { | |
103 | status = PTR_ERR(clnt); | |
5acf4315 CL |
104 | dprintk("lockd: failed to create NSM upcall transport, " |
105 | "status=%d\n", status); | |
1da177e4 LT |
106 | goto out; |
107 | } | |
108 | ||
1da177e4 LT |
109 | memset(res, 0, sizeof(*res)); |
110 | ||
dead28da CL |
111 | msg.rpc_proc = &clnt->cl_procinfo[proc]; |
112 | status = rpc_call_sync(clnt, &msg, 0); | |
1da177e4 | 113 | if (status < 0) |
5acf4315 CL |
114 | dprintk("lockd: NSM upcall RPC failed, status=%d\n", |
115 | status); | |
1da177e4 LT |
116 | else |
117 | status = 0; | |
90c5755f | 118 | rpc_shutdown_client(clnt); |
1da177e4 LT |
119 | out: |
120 | return status; | |
121 | } | |
122 | ||
1e49323c CL |
123 | /** |
124 | * nsm_monitor - Notify a peer in case we reboot | |
125 | * @host: pointer to nlm_host of peer to notify | |
126 | * | |
127 | * If this peer is not already monitored, this function sends an | |
128 | * upcall to the local rpc.statd to record the name/address of | |
129 | * the peer to notify in case we reboot. | |
130 | * | |
131 | * Returns zero if the peer is monitored by the local rpc.statd; | |
132 | * otherwise a negative errno value is returned. | |
1da177e4 | 133 | */ |
1e49323c | 134 | int nsm_monitor(const struct nlm_host *host) |
1da177e4 | 135 | { |
8dead0db | 136 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 LT |
137 | struct nsm_res res; |
138 | int status; | |
139 | ||
9fee4902 | 140 | dprintk("lockd: nsm_monitor(%s)\n", nsm->sm_name); |
8dead0db OK |
141 | |
142 | if (nsm->sm_monitored) | |
977faf39 | 143 | return 0; |
1da177e4 | 144 | |
29ed1407 CL |
145 | /* |
146 | * Choose whether to record the caller_name or IP address of | |
147 | * this peer in the local rpc.statd's database. | |
148 | */ | |
149 | nsm->sm_mon_name = nsm_use_hostnames ? nsm->sm_name : nsm->sm_addrbuf; | |
150 | ||
36e8e668 | 151 | status = nsm_mon_unmon(nsm, NSMPROC_MON, &res); |
6c9dc425 | 152 | if (unlikely(res.status != 0)) |
5d254b11 | 153 | status = -EIO; |
6c9dc425 | 154 | if (unlikely(status < 0)) { |
9fee4902 | 155 | printk(KERN_NOTICE "lockd: cannot monitor %s\n", nsm->sm_name); |
6c9dc425 CL |
156 | return status; |
157 | } | |
158 | ||
159 | nsm->sm_monitored = 1; | |
160 | if (unlikely(nsm_local_state != res.state)) { | |
161 | nsm_local_state = res.state; | |
162 | dprintk("lockd: NSM state changed to %d\n", nsm_local_state); | |
163 | } | |
164 | return 0; | |
1da177e4 LT |
165 | } |
166 | ||
356c3eb4 CL |
167 | /** |
168 | * nsm_unmonitor - Unregister peer notification | |
169 | * @host: pointer to nlm_host of peer to stop monitoring | |
170 | * | |
171 | * If this peer is monitored, this function sends an upcall to | |
172 | * tell the local rpc.statd not to send this peer a notification | |
173 | * when we reboot. | |
1da177e4 | 174 | */ |
356c3eb4 | 175 | void nsm_unmonitor(const struct nlm_host *host) |
1da177e4 | 176 | { |
8dead0db | 177 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 | 178 | struct nsm_res res; |
356c3eb4 | 179 | int status; |
1da177e4 | 180 | |
9502c522 OK |
181 | if (atomic_read(&nsm->sm_count) == 1 |
182 | && nsm->sm_monitored && !nsm->sm_sticky) { | |
9fee4902 | 183 | dprintk("lockd: nsm_unmonitor(%s)\n", nsm->sm_name); |
9502c522 | 184 | |
36e8e668 | 185 | status = nsm_mon_unmon(nsm, NSMPROC_UNMON, &res); |
0c7aef45 CL |
186 | if (res.status != 0) |
187 | status = -EIO; | |
977faf39 | 188 | if (status < 0) |
9502c522 | 189 | printk(KERN_NOTICE "lockd: cannot unmonitor %s\n", |
9fee4902 | 190 | nsm->sm_name); |
9502c522 OK |
191 | else |
192 | nsm->sm_monitored = 0; | |
977faf39 | 193 | } |
1da177e4 LT |
194 | } |
195 | ||
3420a8c4 CL |
196 | static struct nsm_handle *nsm_lookup_hostname(const char *hostname, |
197 | const size_t len) | |
198 | { | |
199 | struct nsm_handle *nsm; | |
200 | ||
201 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
202 | if (strlen(nsm->sm_name) == len && | |
203 | memcmp(nsm->sm_name, hostname, len) == 0) | |
204 | return nsm; | |
205 | return NULL; | |
206 | } | |
207 | ||
77a3ef33 CL |
208 | static struct nsm_handle *nsm_lookup_addr(const struct sockaddr *sap) |
209 | { | |
210 | struct nsm_handle *nsm; | |
211 | ||
212 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
4516fc04 | 213 | if (rpc_cmp_addr(nsm_addr(nsm), sap)) |
77a3ef33 CL |
214 | return nsm; |
215 | return NULL; | |
216 | } | |
217 | ||
3420a8c4 CL |
218 | static struct nsm_handle *nsm_lookup_priv(const struct nsm_private *priv) |
219 | { | |
220 | struct nsm_handle *nsm; | |
221 | ||
222 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
223 | if (memcmp(nsm->sm_priv.data, priv->data, | |
224 | sizeof(priv->data)) == 0) | |
225 | return nsm; | |
226 | return NULL; | |
227 | } | |
228 | ||
7e44d3be CL |
229 | /* |
230 | * Construct a unique cookie to match this nsm_handle to this monitored | |
231 | * host. It is passed to the local rpc.statd via NSMPROC_MON, and | |
232 | * returned via NLMPROC_SM_NOTIFY, in the "priv" field of these | |
233 | * requests. | |
234 | * | |
94da7663 CL |
235 | * The NSM protocol requires that these cookies be unique while the |
236 | * system is running. We prefer a stronger requirement of making them | |
237 | * unique across reboots. If user space bugs cause a stale cookie to | |
238 | * be sent to the kernel, it could cause the wrong host to lose its | |
239 | * lock state if cookies were not unique across reboots. | |
240 | * | |
241 | * The cookies are exposed only to local user space via loopback. They | |
242 | * do not appear on the physical network. If we want greater security | |
243 | * for some reason, nsm_init_private() could perform a one-way hash to | |
244 | * obscure the contents of the cookie. | |
7e44d3be CL |
245 | */ |
246 | static void nsm_init_private(struct nsm_handle *nsm) | |
247 | { | |
94da7663 CL |
248 | u64 *p = (u64 *)&nsm->sm_priv.data; |
249 | struct timespec ts; | |
ad5b365c | 250 | s64 ns; |
94da7663 CL |
251 | |
252 | ktime_get_ts(&ts); | |
ad5b365c MR |
253 | ns = timespec_to_ns(&ts); |
254 | put_unaligned(ns, p); | |
255 | put_unaligned((unsigned long)nsm, p + 1); | |
7e44d3be CL |
256 | } |
257 | ||
b39b897c CL |
258 | static struct nsm_handle *nsm_create_handle(const struct sockaddr *sap, |
259 | const size_t salen, | |
260 | const char *hostname, | |
261 | const size_t hostname_len) | |
262 | { | |
263 | struct nsm_handle *new; | |
264 | ||
265 | new = kzalloc(sizeof(*new) + hostname_len + 1, GFP_KERNEL); | |
266 | if (unlikely(new == NULL)) | |
267 | return NULL; | |
268 | ||
269 | atomic_set(&new->sm_count, 1); | |
270 | new->sm_name = (char *)(new + 1); | |
271 | memcpy(nsm_addr(new), sap, salen); | |
272 | new->sm_addrlen = salen; | |
273 | nsm_init_private(new); | |
c15128c5 CL |
274 | |
275 | if (rpc_ntop(nsm_addr(new), new->sm_addrbuf, | |
276 | sizeof(new->sm_addrbuf)) == 0) | |
277 | (void)snprintf(new->sm_addrbuf, sizeof(new->sm_addrbuf), | |
278 | "unsupported address family"); | |
b39b897c CL |
279 | memcpy(new->sm_name, hostname, hostname_len); |
280 | new->sm_name[hostname_len] = '\0'; | |
281 | ||
282 | return new; | |
283 | } | |
284 | ||
67c6d107 | 285 | /** |
92fd91b9 | 286 | * nsm_get_handle - Find or create a cached nsm_handle |
67c6d107 CL |
287 | * @sap: pointer to socket address of handle to find |
288 | * @salen: length of socket address | |
289 | * @hostname: pointer to C string containing hostname to find | |
290 | * @hostname_len: length of C string | |
67c6d107 | 291 | * |
92fd91b9 | 292 | * Behavior is modulated by the global nsm_use_hostnames variable. |
67c6d107 | 293 | * |
92fd91b9 CL |
294 | * Returns a cached nsm_handle after bumping its ref count, or |
295 | * returns a fresh nsm_handle if a handle that matches @sap and/or | |
296 | * @hostname cannot be found in the handle cache. Returns NULL if | |
297 | * an error occurs. | |
67c6d107 | 298 | */ |
92fd91b9 CL |
299 | struct nsm_handle *nsm_get_handle(const struct sockaddr *sap, |
300 | const size_t salen, const char *hostname, | |
301 | const size_t hostname_len) | |
67c6d107 | 302 | { |
77a3ef33 | 303 | struct nsm_handle *cached, *new = NULL; |
67c6d107 | 304 | |
67c6d107 CL |
305 | if (hostname && memchr(hostname, '/', hostname_len) != NULL) { |
306 | if (printk_ratelimit()) { | |
307 | printk(KERN_WARNING "Invalid hostname \"%.*s\" " | |
308 | "in NFS lock request\n", | |
309 | (int)hostname_len, hostname); | |
310 | } | |
311 | return NULL; | |
312 | } | |
313 | ||
314 | retry: | |
315 | spin_lock(&nsm_lock); | |
77a3ef33 CL |
316 | |
317 | if (nsm_use_hostnames && hostname != NULL) | |
318 | cached = nsm_lookup_hostname(hostname, hostname_len); | |
319 | else | |
320 | cached = nsm_lookup_addr(sap); | |
321 | ||
322 | if (cached != NULL) { | |
323 | atomic_inc(&cached->sm_count); | |
324 | spin_unlock(&nsm_lock); | |
325 | kfree(new); | |
326 | dprintk("lockd: found nsm_handle for %s (%s), " | |
327 | "cnt %d\n", cached->sm_name, | |
328 | cached->sm_addrbuf, | |
329 | atomic_read(&cached->sm_count)); | |
330 | return cached; | |
67c6d107 | 331 | } |
77a3ef33 CL |
332 | |
333 | if (new != NULL) { | |
334 | list_add(&new->sm_link, &nsm_handles); | |
335 | spin_unlock(&nsm_lock); | |
5cf1c4b1 | 336 | dprintk("lockd: created nsm_handle for %s (%s)\n", |
77a3ef33 CL |
337 | new->sm_name, new->sm_addrbuf); |
338 | return new; | |
67c6d107 | 339 | } |
77a3ef33 | 340 | |
67c6d107 CL |
341 | spin_unlock(&nsm_lock); |
342 | ||
77a3ef33 CL |
343 | new = nsm_create_handle(sap, salen, hostname, hostname_len); |
344 | if (unlikely(new == NULL)) | |
67c6d107 | 345 | return NULL; |
67c6d107 | 346 | goto retry; |
67c6d107 CL |
347 | } |
348 | ||
3420a8c4 CL |
349 | /** |
350 | * nsm_reboot_lookup - match NLMPROC_SM_NOTIFY arguments to an nsm_handle | |
351 | * @info: pointer to NLMPROC_SM_NOTIFY arguments | |
352 | * | |
7e469af9 JL |
353 | * Returns a matching nsm_handle if found in the nsm cache. The returned |
354 | * nsm_handle's reference count is bumped. Otherwise returns NULL if some | |
355 | * error occurred. | |
3420a8c4 CL |
356 | */ |
357 | struct nsm_handle *nsm_reboot_lookup(const struct nlm_reboot *info) | |
358 | { | |
359 | struct nsm_handle *cached; | |
360 | ||
361 | spin_lock(&nsm_lock); | |
362 | ||
94da7663 | 363 | cached = nsm_lookup_priv(&info->priv); |
3420a8c4 CL |
364 | if (unlikely(cached == NULL)) { |
365 | spin_unlock(&nsm_lock); | |
366 | dprintk("lockd: never saw rebooted peer '%.*s' before\n", | |
367 | info->len, info->mon); | |
368 | return cached; | |
369 | } | |
370 | ||
371 | atomic_inc(&cached->sm_count); | |
372 | spin_unlock(&nsm_lock); | |
373 | ||
3420a8c4 CL |
374 | dprintk("lockd: host %s (%s) rebooted, cnt %d\n", |
375 | cached->sm_name, cached->sm_addrbuf, | |
376 | atomic_read(&cached->sm_count)); | |
377 | return cached; | |
378 | } | |
379 | ||
67c6d107 CL |
380 | /** |
381 | * nsm_release - Release an NSM handle | |
382 | * @nsm: pointer to handle to be released | |
383 | * | |
384 | */ | |
385 | void nsm_release(struct nsm_handle *nsm) | |
386 | { | |
67c6d107 CL |
387 | if (atomic_dec_and_lock(&nsm->sm_count, &nsm_lock)) { |
388 | list_del(&nsm->sm_link); | |
389 | spin_unlock(&nsm_lock); | |
5cf1c4b1 CL |
390 | dprintk("lockd: destroyed nsm_handle for %s (%s)\n", |
391 | nsm->sm_name, nsm->sm_addrbuf); | |
67c6d107 CL |
392 | kfree(nsm); |
393 | } | |
394 | } | |
395 | ||
1da177e4 LT |
396 | /* |
397 | * XDR functions for NSM. | |
2ca7754d CL |
398 | * |
399 | * See http://www.opengroup.org/ for details on the Network | |
400 | * Status Monitor wire protocol. | |
1da177e4 LT |
401 | */ |
402 | ||
03eb1dcb | 403 | static int encode_nsm_string(struct xdr_stream *xdr, const char *string) |
099bd05f | 404 | { |
03eb1dcb CL |
405 | const u32 len = strlen(string); |
406 | __be32 *p; | |
407 | ||
408 | if (unlikely(len > SM_MAXSTRLEN)) | |
409 | return -EIO; | |
410 | p = xdr_reserve_space(xdr, sizeof(u32) + len); | |
411 | if (unlikely(p == NULL)) | |
412 | return -EIO; | |
413 | xdr_encode_opaque(p, string, len); | |
414 | return 0; | |
099bd05f CL |
415 | } |
416 | ||
49695174 CL |
417 | /* |
418 | * "mon_name" specifies the host to be monitored. | |
49695174 | 419 | */ |
03eb1dcb | 420 | static int encode_mon_name(struct xdr_stream *xdr, const struct nsm_args *argp) |
49695174 | 421 | { |
03eb1dcb | 422 | return encode_nsm_string(xdr, argp->mon_name); |
49695174 CL |
423 | } |
424 | ||
850c95fd CL |
425 | /* |
426 | * The "my_id" argument specifies the hostname and RPC procedure | |
427 | * to be called when the status manager receives notification | |
36e8e668 | 428 | * (via the NLMPROC_SM_NOTIFY call) that the state of host "mon_name" |
850c95fd CL |
429 | * has changed. |
430 | */ | |
03eb1dcb | 431 | static int encode_my_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
850c95fd | 432 | { |
03eb1dcb CL |
433 | int status; |
434 | __be32 *p; | |
435 | ||
436 | status = encode_nsm_string(xdr, utsname()->nodename); | |
437 | if (unlikely(status != 0)) | |
438 | return status; | |
439 | p = xdr_reserve_space(xdr, 3 * sizeof(u32)); | |
440 | if (unlikely(p == NULL)) | |
441 | return -EIO; | |
850c95fd CL |
442 | *p++ = htonl(argp->prog); |
443 | *p++ = htonl(argp->vers); | |
444 | *p++ = htonl(argp->proc); | |
03eb1dcb | 445 | return 0; |
850c95fd CL |
446 | } |
447 | ||
ea72a7f1 CL |
448 | /* |
449 | * The "mon_id" argument specifies the non-private arguments | |
36e8e668 | 450 | * of an NSMPROC_MON or NSMPROC_UNMON call. |
ea72a7f1 | 451 | */ |
03eb1dcb | 452 | static int encode_mon_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
ea72a7f1 | 453 | { |
03eb1dcb | 454 | int status; |
ea72a7f1 | 455 | |
03eb1dcb CL |
456 | status = encode_mon_name(xdr, argp); |
457 | if (unlikely(status != 0)) | |
458 | return status; | |
459 | return encode_my_id(xdr, argp); | |
ea72a7f1 CL |
460 | } |
461 | ||
0490a54a CL |
462 | /* |
463 | * The "priv" argument may contain private information required | |
36e8e668 CL |
464 | * by the NSMPROC_MON call. This information will be supplied in the |
465 | * NLMPROC_SM_NOTIFY call. | |
0490a54a | 466 | */ |
03eb1dcb | 467 | static int encode_priv(struct xdr_stream *xdr, const struct nsm_args *argp) |
0490a54a | 468 | { |
03eb1dcb CL |
469 | __be32 *p; |
470 | ||
471 | p = xdr_reserve_space(xdr, SM_PRIV_SIZE); | |
472 | if (unlikely(p == NULL)) | |
473 | return -EIO; | |
cab2d3c9 | 474 | xdr_encode_opaque_fixed(p, argp->priv->data, SM_PRIV_SIZE); |
03eb1dcb | 475 | return 0; |
0490a54a CL |
476 | } |
477 | ||
03eb1dcb CL |
478 | static int xdr_enc_mon(struct rpc_rqst *req, __be32 *p, |
479 | const struct nsm_args *argp) | |
1da177e4 | 480 | { |
03eb1dcb CL |
481 | struct xdr_stream xdr; |
482 | int status; | |
0490a54a | 483 | |
03eb1dcb CL |
484 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
485 | status = encode_mon_id(&xdr, argp); | |
486 | if (unlikely(status)) | |
487 | return status; | |
488 | return encode_priv(&xdr, argp); | |
1da177e4 LT |
489 | } |
490 | ||
03eb1dcb CL |
491 | static int xdr_enc_unmon(struct rpc_rqst *req, __be32 *p, |
492 | const struct nsm_args *argp) | |
1da177e4 | 493 | { |
03eb1dcb CL |
494 | struct xdr_stream xdr; |
495 | ||
496 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
497 | return encode_mon_id(&xdr, argp); | |
1da177e4 LT |
498 | } |
499 | ||
03eb1dcb CL |
500 | static int xdr_dec_stat_res(struct rpc_rqst *rqstp, __be32 *p, |
501 | struct nsm_res *resp) | |
1da177e4 | 502 | { |
03eb1dcb CL |
503 | struct xdr_stream xdr; |
504 | ||
505 | xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); | |
506 | p = xdr_inline_decode(&xdr, 2 * sizeof(u32)); | |
507 | if (unlikely(p == NULL)) | |
508 | return -EIO; | |
1da177e4 | 509 | resp->status = ntohl(*p++); |
03eb1dcb CL |
510 | resp->state = ntohl(*p); |
511 | ||
512 | dprintk("lockd: xdr_dec_stat_res status %d state %d\n", | |
1da177e4 LT |
513 | resp->status, resp->state); |
514 | return 0; | |
515 | } | |
516 | ||
03eb1dcb CL |
517 | static int xdr_dec_stat(struct rpc_rqst *rqstp, __be32 *p, |
518 | struct nsm_res *resp) | |
1da177e4 | 519 | { |
03eb1dcb CL |
520 | struct xdr_stream xdr; |
521 | ||
522 | xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); | |
523 | p = xdr_inline_decode(&xdr, sizeof(u32)); | |
524 | if (unlikely(p == NULL)) | |
525 | return -EIO; | |
526 | resp->state = ntohl(*p); | |
527 | ||
528 | dprintk("lockd: xdr_dec_stat state %d\n", resp->state); | |
1da177e4 LT |
529 | return 0; |
530 | } | |
531 | ||
532 | #define SM_my_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN)) | |
2ca7754d CL |
533 | #define SM_my_id_sz (SM_my_name_sz+3) |
534 | #define SM_mon_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN)) | |
535 | #define SM_mon_id_sz (SM_mon_name_sz+SM_my_id_sz) | |
0490a54a CL |
536 | #define SM_priv_sz (XDR_QUADLEN(SM_PRIV_SIZE)) |
537 | #define SM_mon_sz (SM_mon_id_sz+SM_priv_sz) | |
1da177e4 LT |
538 | #define SM_monres_sz 2 |
539 | #define SM_unmonres_sz 1 | |
540 | ||
1da177e4 | 541 | static struct rpc_procinfo nsm_procedures[] = { |
36e8e668 CL |
542 | [NSMPROC_MON] = { |
543 | .p_proc = NSMPROC_MON, | |
03eb1dcb CL |
544 | .p_encode = (kxdrproc_t)xdr_enc_mon, |
545 | .p_decode = (kxdrproc_t)xdr_dec_stat_res, | |
2bea90d4 CL |
546 | .p_arglen = SM_mon_sz, |
547 | .p_replen = SM_monres_sz, | |
36e8e668 | 548 | .p_statidx = NSMPROC_MON, |
cc0175c1 | 549 | .p_name = "MONITOR", |
1da177e4 | 550 | }, |
36e8e668 CL |
551 | [NSMPROC_UNMON] = { |
552 | .p_proc = NSMPROC_UNMON, | |
03eb1dcb CL |
553 | .p_encode = (kxdrproc_t)xdr_enc_unmon, |
554 | .p_decode = (kxdrproc_t)xdr_dec_stat, | |
2bea90d4 CL |
555 | .p_arglen = SM_mon_id_sz, |
556 | .p_replen = SM_unmonres_sz, | |
36e8e668 | 557 | .p_statidx = NSMPROC_UNMON, |
cc0175c1 | 558 | .p_name = "UNMONITOR", |
1da177e4 LT |
559 | }, |
560 | }; | |
561 | ||
562 | static struct rpc_version nsm_version1 = { | |
e8c96f8c TK |
563 | .number = 1, |
564 | .nrprocs = ARRAY_SIZE(nsm_procedures), | |
1da177e4 LT |
565 | .procs = nsm_procedures |
566 | }; | |
567 | ||
568 | static struct rpc_version * nsm_version[] = { | |
569 | [1] = &nsm_version1, | |
570 | }; | |
571 | ||
572 | static struct rpc_stat nsm_stats; | |
573 | ||
574 | static struct rpc_program nsm_program = { | |
575 | .name = "statd", | |
36e8e668 | 576 | .number = NSM_PROGRAM, |
e8c96f8c | 577 | .nrvers = ARRAY_SIZE(nsm_version), |
1da177e4 LT |
578 | .version = nsm_version, |
579 | .stats = &nsm_stats | |
580 | }; |