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 CL |
12 | #include <linux/ktime.h> |
13 | ||
1da177e4 | 14 | #include <linux/sunrpc/clnt.h> |
0896a725 | 15 | #include <linux/sunrpc/xprtsock.h> |
1da177e4 LT |
16 | #include <linux/sunrpc/svc.h> |
17 | #include <linux/lockd/lockd.h> | |
1da177e4 | 18 | |
ad5b365c MR |
19 | #include <asm/unaligned.h> |
20 | ||
1da177e4 | 21 | #define NLMDBG_FACILITY NLMDBG_MONITOR |
36e8e668 CL |
22 | #define NSM_PROGRAM 100024 |
23 | #define NSM_VERSION 1 | |
24 | ||
25 | enum { | |
26 | NSMPROC_NULL, | |
27 | NSMPROC_STAT, | |
28 | NSMPROC_MON, | |
29 | NSMPROC_UNMON, | |
30 | NSMPROC_UNMON_ALL, | |
31 | NSMPROC_SIMU_CRASH, | |
32 | NSMPROC_NOTIFY, | |
33 | }; | |
1da177e4 | 34 | |
9c1bfd03 | 35 | struct nsm_args { |
cab2d3c9 | 36 | struct nsm_private *priv; |
9c1bfd03 CL |
37 | u32 prog; /* RPC callback info */ |
38 | u32 vers; | |
39 | u32 proc; | |
40 | ||
41 | char *mon_name; | |
42 | }; | |
43 | ||
44 | struct nsm_res { | |
45 | u32 status; | |
46 | u32 state; | |
47 | }; | |
48 | ||
1da177e4 | 49 | static struct rpc_program nsm_program; |
67c6d107 CL |
50 | static LIST_HEAD(nsm_handles); |
51 | static DEFINE_SPINLOCK(nsm_lock); | |
1da177e4 LT |
52 | |
53 | /* | |
54 | * Local NSM state | |
55 | */ | |
6c9dc425 | 56 | u32 __read_mostly nsm_local_state; |
b7ba597f | 57 | int __read_mostly nsm_use_hostnames; |
1da177e4 | 58 | |
8529bc51 CL |
59 | static inline struct sockaddr *nsm_addr(const struct nsm_handle *nsm) |
60 | { | |
61 | return (struct sockaddr *)&nsm->sm_addr; | |
62 | } | |
63 | ||
49b5699b CL |
64 | static struct rpc_clnt *nsm_create(void) |
65 | { | |
66 | struct sockaddr_in sin = { | |
67 | .sin_family = AF_INET, | |
68 | .sin_addr.s_addr = htonl(INADDR_LOOPBACK), | |
69 | }; | |
70 | struct rpc_create_args args = { | |
71 | .protocol = XPRT_TRANSPORT_UDP, | |
72 | .address = (struct sockaddr *)&sin, | |
73 | .addrsize = sizeof(sin), | |
74 | .servername = "rpc.statd", | |
75 | .program = &nsm_program, | |
76 | .version = NSM_VERSION, | |
77 | .authflavor = RPC_AUTH_NULL, | |
0e5c2632 | 78 | .flags = RPC_CLNT_CREATE_NOPING, |
49b5699b CL |
79 | }; |
80 | ||
81 | return rpc_create(&args); | |
82 | } | |
83 | ||
84 | static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res) | |
1da177e4 LT |
85 | { |
86 | struct rpc_clnt *clnt; | |
87 | int status; | |
a4846750 | 88 | struct nsm_args args = { |
cab2d3c9 | 89 | .priv = &nsm->sm_priv, |
a4846750 CL |
90 | .prog = NLM_PROGRAM, |
91 | .vers = 3, | |
92 | .proc = NLMPROC_NSM_NOTIFY, | |
29ed1407 | 93 | .mon_name = nsm->sm_mon_name, |
a4846750 | 94 | }; |
dead28da CL |
95 | struct rpc_message msg = { |
96 | .rpc_argp = &args, | |
97 | .rpc_resp = res, | |
98 | }; | |
1da177e4 LT |
99 | |
100 | clnt = nsm_create(); | |
101 | if (IS_ERR(clnt)) { | |
102 | status = PTR_ERR(clnt); | |
5acf4315 CL |
103 | dprintk("lockd: failed to create NSM upcall transport, " |
104 | "status=%d\n", status); | |
1da177e4 LT |
105 | goto out; |
106 | } | |
107 | ||
1da177e4 LT |
108 | memset(res, 0, sizeof(*res)); |
109 | ||
dead28da CL |
110 | msg.rpc_proc = &clnt->cl_procinfo[proc]; |
111 | status = rpc_call_sync(clnt, &msg, 0); | |
1da177e4 | 112 | if (status < 0) |
5acf4315 CL |
113 | dprintk("lockd: NSM upcall RPC failed, status=%d\n", |
114 | status); | |
1da177e4 LT |
115 | else |
116 | status = 0; | |
90c5755f | 117 | rpc_shutdown_client(clnt); |
1da177e4 LT |
118 | out: |
119 | return status; | |
120 | } | |
121 | ||
1e49323c CL |
122 | /** |
123 | * nsm_monitor - Notify a peer in case we reboot | |
124 | * @host: pointer to nlm_host of peer to notify | |
125 | * | |
126 | * If this peer is not already monitored, this function sends an | |
127 | * upcall to the local rpc.statd to record the name/address of | |
128 | * the peer to notify in case we reboot. | |
129 | * | |
130 | * Returns zero if the peer is monitored by the local rpc.statd; | |
131 | * otherwise a negative errno value is returned. | |
1da177e4 | 132 | */ |
1e49323c | 133 | int nsm_monitor(const struct nlm_host *host) |
1da177e4 | 134 | { |
8dead0db | 135 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 LT |
136 | struct nsm_res res; |
137 | int status; | |
138 | ||
9fee4902 | 139 | dprintk("lockd: nsm_monitor(%s)\n", nsm->sm_name); |
8dead0db OK |
140 | |
141 | if (nsm->sm_monitored) | |
977faf39 | 142 | return 0; |
1da177e4 | 143 | |
29ed1407 CL |
144 | /* |
145 | * Choose whether to record the caller_name or IP address of | |
146 | * this peer in the local rpc.statd's database. | |
147 | */ | |
148 | nsm->sm_mon_name = nsm_use_hostnames ? nsm->sm_name : nsm->sm_addrbuf; | |
149 | ||
36e8e668 | 150 | status = nsm_mon_unmon(nsm, NSMPROC_MON, &res); |
6c9dc425 | 151 | if (unlikely(res.status != 0)) |
5d254b11 | 152 | status = -EIO; |
6c9dc425 | 153 | if (unlikely(status < 0)) { |
9fee4902 | 154 | printk(KERN_NOTICE "lockd: cannot monitor %s\n", nsm->sm_name); |
6c9dc425 CL |
155 | return status; |
156 | } | |
157 | ||
158 | nsm->sm_monitored = 1; | |
159 | if (unlikely(nsm_local_state != res.state)) { | |
160 | nsm_local_state = res.state; | |
161 | dprintk("lockd: NSM state changed to %d\n", nsm_local_state); | |
162 | } | |
163 | return 0; | |
1da177e4 LT |
164 | } |
165 | ||
356c3eb4 CL |
166 | /** |
167 | * nsm_unmonitor - Unregister peer notification | |
168 | * @host: pointer to nlm_host of peer to stop monitoring | |
169 | * | |
170 | * If this peer is monitored, this function sends an upcall to | |
171 | * tell the local rpc.statd not to send this peer a notification | |
172 | * when we reboot. | |
1da177e4 | 173 | */ |
356c3eb4 | 174 | void nsm_unmonitor(const struct nlm_host *host) |
1da177e4 | 175 | { |
8dead0db | 176 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 | 177 | struct nsm_res res; |
356c3eb4 | 178 | int status; |
1da177e4 | 179 | |
9502c522 OK |
180 | if (atomic_read(&nsm->sm_count) == 1 |
181 | && nsm->sm_monitored && !nsm->sm_sticky) { | |
9fee4902 | 182 | dprintk("lockd: nsm_unmonitor(%s)\n", nsm->sm_name); |
9502c522 | 183 | |
36e8e668 | 184 | status = nsm_mon_unmon(nsm, NSMPROC_UNMON, &res); |
0c7aef45 CL |
185 | if (res.status != 0) |
186 | status = -EIO; | |
977faf39 | 187 | if (status < 0) |
9502c522 | 188 | printk(KERN_NOTICE "lockd: cannot unmonitor %s\n", |
9fee4902 | 189 | nsm->sm_name); |
9502c522 OK |
190 | else |
191 | nsm->sm_monitored = 0; | |
977faf39 | 192 | } |
1da177e4 LT |
193 | } |
194 | ||
3420a8c4 CL |
195 | static struct nsm_handle *nsm_lookup_hostname(const char *hostname, |
196 | const size_t len) | |
197 | { | |
198 | struct nsm_handle *nsm; | |
199 | ||
200 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
201 | if (strlen(nsm->sm_name) == len && | |
202 | memcmp(nsm->sm_name, hostname, len) == 0) | |
203 | return nsm; | |
204 | return NULL; | |
205 | } | |
206 | ||
77a3ef33 CL |
207 | static struct nsm_handle *nsm_lookup_addr(const struct sockaddr *sap) |
208 | { | |
209 | struct nsm_handle *nsm; | |
210 | ||
211 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
4516fc04 | 212 | if (rpc_cmp_addr(nsm_addr(nsm), sap)) |
77a3ef33 CL |
213 | return nsm; |
214 | return NULL; | |
215 | } | |
216 | ||
3420a8c4 CL |
217 | static struct nsm_handle *nsm_lookup_priv(const struct nsm_private *priv) |
218 | { | |
219 | struct nsm_handle *nsm; | |
220 | ||
221 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
222 | if (memcmp(nsm->sm_priv.data, priv->data, | |
223 | sizeof(priv->data)) == 0) | |
224 | return nsm; | |
225 | return NULL; | |
226 | } | |
227 | ||
7e44d3be CL |
228 | /* |
229 | * Construct a unique cookie to match this nsm_handle to this monitored | |
230 | * host. It is passed to the local rpc.statd via NSMPROC_MON, and | |
231 | * returned via NLMPROC_SM_NOTIFY, in the "priv" field of these | |
232 | * requests. | |
233 | * | |
94da7663 CL |
234 | * The NSM protocol requires that these cookies be unique while the |
235 | * system is running. We prefer a stronger requirement of making them | |
236 | * unique across reboots. If user space bugs cause a stale cookie to | |
237 | * be sent to the kernel, it could cause the wrong host to lose its | |
238 | * lock state if cookies were not unique across reboots. | |
239 | * | |
240 | * The cookies are exposed only to local user space via loopback. They | |
241 | * do not appear on the physical network. If we want greater security | |
242 | * for some reason, nsm_init_private() could perform a one-way hash to | |
243 | * obscure the contents of the cookie. | |
7e44d3be CL |
244 | */ |
245 | static void nsm_init_private(struct nsm_handle *nsm) | |
246 | { | |
94da7663 CL |
247 | u64 *p = (u64 *)&nsm->sm_priv.data; |
248 | struct timespec ts; | |
ad5b365c | 249 | s64 ns; |
94da7663 CL |
250 | |
251 | ktime_get_ts(&ts); | |
ad5b365c MR |
252 | ns = timespec_to_ns(&ts); |
253 | put_unaligned(ns, p); | |
254 | put_unaligned((unsigned long)nsm, p + 1); | |
7e44d3be CL |
255 | } |
256 | ||
b39b897c CL |
257 | static struct nsm_handle *nsm_create_handle(const struct sockaddr *sap, |
258 | const size_t salen, | |
259 | const char *hostname, | |
260 | const size_t hostname_len) | |
261 | { | |
262 | struct nsm_handle *new; | |
263 | ||
264 | new = kzalloc(sizeof(*new) + hostname_len + 1, GFP_KERNEL); | |
265 | if (unlikely(new == NULL)) | |
266 | return NULL; | |
267 | ||
268 | atomic_set(&new->sm_count, 1); | |
269 | new->sm_name = (char *)(new + 1); | |
270 | memcpy(nsm_addr(new), sap, salen); | |
271 | new->sm_addrlen = salen; | |
272 | nsm_init_private(new); | |
c15128c5 CL |
273 | |
274 | if (rpc_ntop(nsm_addr(new), new->sm_addrbuf, | |
275 | sizeof(new->sm_addrbuf)) == 0) | |
276 | (void)snprintf(new->sm_addrbuf, sizeof(new->sm_addrbuf), | |
277 | "unsupported address family"); | |
b39b897c CL |
278 | memcpy(new->sm_name, hostname, hostname_len); |
279 | new->sm_name[hostname_len] = '\0'; | |
280 | ||
281 | return new; | |
282 | } | |
283 | ||
67c6d107 | 284 | /** |
92fd91b9 | 285 | * nsm_get_handle - Find or create a cached nsm_handle |
67c6d107 CL |
286 | * @sap: pointer to socket address of handle to find |
287 | * @salen: length of socket address | |
288 | * @hostname: pointer to C string containing hostname to find | |
289 | * @hostname_len: length of C string | |
67c6d107 | 290 | * |
92fd91b9 | 291 | * Behavior is modulated by the global nsm_use_hostnames variable. |
67c6d107 | 292 | * |
92fd91b9 CL |
293 | * Returns a cached nsm_handle after bumping its ref count, or |
294 | * returns a fresh nsm_handle if a handle that matches @sap and/or | |
295 | * @hostname cannot be found in the handle cache. Returns NULL if | |
296 | * an error occurs. | |
67c6d107 | 297 | */ |
92fd91b9 CL |
298 | struct nsm_handle *nsm_get_handle(const struct sockaddr *sap, |
299 | const size_t salen, const char *hostname, | |
300 | const size_t hostname_len) | |
67c6d107 | 301 | { |
77a3ef33 | 302 | struct nsm_handle *cached, *new = NULL; |
67c6d107 | 303 | |
67c6d107 CL |
304 | if (hostname && memchr(hostname, '/', hostname_len) != NULL) { |
305 | if (printk_ratelimit()) { | |
306 | printk(KERN_WARNING "Invalid hostname \"%.*s\" " | |
307 | "in NFS lock request\n", | |
308 | (int)hostname_len, hostname); | |
309 | } | |
310 | return NULL; | |
311 | } | |
312 | ||
313 | retry: | |
314 | spin_lock(&nsm_lock); | |
77a3ef33 CL |
315 | |
316 | if (nsm_use_hostnames && hostname != NULL) | |
317 | cached = nsm_lookup_hostname(hostname, hostname_len); | |
318 | else | |
319 | cached = nsm_lookup_addr(sap); | |
320 | ||
321 | if (cached != NULL) { | |
322 | atomic_inc(&cached->sm_count); | |
323 | spin_unlock(&nsm_lock); | |
324 | kfree(new); | |
325 | dprintk("lockd: found nsm_handle for %s (%s), " | |
326 | "cnt %d\n", cached->sm_name, | |
327 | cached->sm_addrbuf, | |
328 | atomic_read(&cached->sm_count)); | |
329 | return cached; | |
67c6d107 | 330 | } |
77a3ef33 CL |
331 | |
332 | if (new != NULL) { | |
333 | list_add(&new->sm_link, &nsm_handles); | |
334 | spin_unlock(&nsm_lock); | |
5cf1c4b1 | 335 | dprintk("lockd: created nsm_handle for %s (%s)\n", |
77a3ef33 CL |
336 | new->sm_name, new->sm_addrbuf); |
337 | return new; | |
67c6d107 | 338 | } |
77a3ef33 | 339 | |
67c6d107 CL |
340 | spin_unlock(&nsm_lock); |
341 | ||
77a3ef33 CL |
342 | new = nsm_create_handle(sap, salen, hostname, hostname_len); |
343 | if (unlikely(new == NULL)) | |
67c6d107 | 344 | return NULL; |
67c6d107 | 345 | goto retry; |
67c6d107 CL |
346 | } |
347 | ||
3420a8c4 CL |
348 | /** |
349 | * nsm_reboot_lookup - match NLMPROC_SM_NOTIFY arguments to an nsm_handle | |
350 | * @info: pointer to NLMPROC_SM_NOTIFY arguments | |
351 | * | |
352 | * Returns a matching nsm_handle if found in the nsm cache; the returned | |
353 | * nsm_handle's reference count is bumped and sm_monitored is cleared. | |
354 | * Otherwise returns NULL if some error occurred. | |
355 | */ | |
356 | struct nsm_handle *nsm_reboot_lookup(const struct nlm_reboot *info) | |
357 | { | |
358 | struct nsm_handle *cached; | |
359 | ||
360 | spin_lock(&nsm_lock); | |
361 | ||
94da7663 | 362 | cached = nsm_lookup_priv(&info->priv); |
3420a8c4 CL |
363 | if (unlikely(cached == NULL)) { |
364 | spin_unlock(&nsm_lock); | |
365 | dprintk("lockd: never saw rebooted peer '%.*s' before\n", | |
366 | info->len, info->mon); | |
367 | return cached; | |
368 | } | |
369 | ||
370 | atomic_inc(&cached->sm_count); | |
371 | spin_unlock(&nsm_lock); | |
372 | ||
373 | /* | |
374 | * During subsequent lock activity, force a fresh | |
375 | * notification to be set up for this host. | |
376 | */ | |
377 | cached->sm_monitored = 0; | |
378 | ||
379 | dprintk("lockd: host %s (%s) rebooted, cnt %d\n", | |
380 | cached->sm_name, cached->sm_addrbuf, | |
381 | atomic_read(&cached->sm_count)); | |
382 | return cached; | |
383 | } | |
384 | ||
67c6d107 CL |
385 | /** |
386 | * nsm_release - Release an NSM handle | |
387 | * @nsm: pointer to handle to be released | |
388 | * | |
389 | */ | |
390 | void nsm_release(struct nsm_handle *nsm) | |
391 | { | |
67c6d107 CL |
392 | if (atomic_dec_and_lock(&nsm->sm_count, &nsm_lock)) { |
393 | list_del(&nsm->sm_link); | |
394 | spin_unlock(&nsm_lock); | |
5cf1c4b1 CL |
395 | dprintk("lockd: destroyed nsm_handle for %s (%s)\n", |
396 | nsm->sm_name, nsm->sm_addrbuf); | |
67c6d107 CL |
397 | kfree(nsm); |
398 | } | |
399 | } | |
400 | ||
1da177e4 LT |
401 | /* |
402 | * XDR functions for NSM. | |
2ca7754d CL |
403 | * |
404 | * See http://www.opengroup.org/ for details on the Network | |
405 | * Status Monitor wire protocol. | |
1da177e4 LT |
406 | */ |
407 | ||
03eb1dcb | 408 | static int encode_nsm_string(struct xdr_stream *xdr, const char *string) |
099bd05f | 409 | { |
03eb1dcb CL |
410 | const u32 len = strlen(string); |
411 | __be32 *p; | |
412 | ||
413 | if (unlikely(len > SM_MAXSTRLEN)) | |
414 | return -EIO; | |
415 | p = xdr_reserve_space(xdr, sizeof(u32) + len); | |
416 | if (unlikely(p == NULL)) | |
417 | return -EIO; | |
418 | xdr_encode_opaque(p, string, len); | |
419 | return 0; | |
099bd05f CL |
420 | } |
421 | ||
49695174 CL |
422 | /* |
423 | * "mon_name" specifies the host to be monitored. | |
49695174 | 424 | */ |
03eb1dcb | 425 | static int encode_mon_name(struct xdr_stream *xdr, const struct nsm_args *argp) |
49695174 | 426 | { |
03eb1dcb | 427 | return encode_nsm_string(xdr, argp->mon_name); |
49695174 CL |
428 | } |
429 | ||
850c95fd CL |
430 | /* |
431 | * The "my_id" argument specifies the hostname and RPC procedure | |
432 | * to be called when the status manager receives notification | |
36e8e668 | 433 | * (via the NLMPROC_SM_NOTIFY call) that the state of host "mon_name" |
850c95fd CL |
434 | * has changed. |
435 | */ | |
03eb1dcb | 436 | static int encode_my_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
850c95fd | 437 | { |
03eb1dcb CL |
438 | int status; |
439 | __be32 *p; | |
440 | ||
441 | status = encode_nsm_string(xdr, utsname()->nodename); | |
442 | if (unlikely(status != 0)) | |
443 | return status; | |
444 | p = xdr_reserve_space(xdr, 3 * sizeof(u32)); | |
445 | if (unlikely(p == NULL)) | |
446 | return -EIO; | |
850c95fd CL |
447 | *p++ = htonl(argp->prog); |
448 | *p++ = htonl(argp->vers); | |
449 | *p++ = htonl(argp->proc); | |
03eb1dcb | 450 | return 0; |
850c95fd CL |
451 | } |
452 | ||
ea72a7f1 CL |
453 | /* |
454 | * The "mon_id" argument specifies the non-private arguments | |
36e8e668 | 455 | * of an NSMPROC_MON or NSMPROC_UNMON call. |
ea72a7f1 | 456 | */ |
03eb1dcb | 457 | static int encode_mon_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
ea72a7f1 | 458 | { |
03eb1dcb | 459 | int status; |
ea72a7f1 | 460 | |
03eb1dcb CL |
461 | status = encode_mon_name(xdr, argp); |
462 | if (unlikely(status != 0)) | |
463 | return status; | |
464 | return encode_my_id(xdr, argp); | |
ea72a7f1 CL |
465 | } |
466 | ||
0490a54a CL |
467 | /* |
468 | * The "priv" argument may contain private information required | |
36e8e668 CL |
469 | * by the NSMPROC_MON call. This information will be supplied in the |
470 | * NLMPROC_SM_NOTIFY call. | |
0490a54a | 471 | */ |
03eb1dcb | 472 | static int encode_priv(struct xdr_stream *xdr, const struct nsm_args *argp) |
0490a54a | 473 | { |
03eb1dcb CL |
474 | __be32 *p; |
475 | ||
476 | p = xdr_reserve_space(xdr, SM_PRIV_SIZE); | |
477 | if (unlikely(p == NULL)) | |
478 | return -EIO; | |
cab2d3c9 | 479 | xdr_encode_opaque_fixed(p, argp->priv->data, SM_PRIV_SIZE); |
03eb1dcb | 480 | return 0; |
0490a54a CL |
481 | } |
482 | ||
03eb1dcb CL |
483 | static int xdr_enc_mon(struct rpc_rqst *req, __be32 *p, |
484 | const struct nsm_args *argp) | |
1da177e4 | 485 | { |
03eb1dcb CL |
486 | struct xdr_stream xdr; |
487 | int status; | |
0490a54a | 488 | |
03eb1dcb CL |
489 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
490 | status = encode_mon_id(&xdr, argp); | |
491 | if (unlikely(status)) | |
492 | return status; | |
493 | return encode_priv(&xdr, argp); | |
1da177e4 LT |
494 | } |
495 | ||
03eb1dcb CL |
496 | static int xdr_enc_unmon(struct rpc_rqst *req, __be32 *p, |
497 | const struct nsm_args *argp) | |
1da177e4 | 498 | { |
03eb1dcb CL |
499 | struct xdr_stream xdr; |
500 | ||
501 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
502 | return encode_mon_id(&xdr, argp); | |
1da177e4 LT |
503 | } |
504 | ||
03eb1dcb CL |
505 | static int xdr_dec_stat_res(struct rpc_rqst *rqstp, __be32 *p, |
506 | struct nsm_res *resp) | |
1da177e4 | 507 | { |
03eb1dcb CL |
508 | struct xdr_stream xdr; |
509 | ||
510 | xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); | |
511 | p = xdr_inline_decode(&xdr, 2 * sizeof(u32)); | |
512 | if (unlikely(p == NULL)) | |
513 | return -EIO; | |
1da177e4 | 514 | resp->status = ntohl(*p++); |
03eb1dcb CL |
515 | resp->state = ntohl(*p); |
516 | ||
517 | dprintk("lockd: xdr_dec_stat_res status %d state %d\n", | |
1da177e4 LT |
518 | resp->status, resp->state); |
519 | return 0; | |
520 | } | |
521 | ||
03eb1dcb CL |
522 | static int xdr_dec_stat(struct rpc_rqst *rqstp, __be32 *p, |
523 | struct nsm_res *resp) | |
1da177e4 | 524 | { |
03eb1dcb CL |
525 | struct xdr_stream xdr; |
526 | ||
527 | xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); | |
528 | p = xdr_inline_decode(&xdr, sizeof(u32)); | |
529 | if (unlikely(p == NULL)) | |
530 | return -EIO; | |
531 | resp->state = ntohl(*p); | |
532 | ||
533 | dprintk("lockd: xdr_dec_stat state %d\n", resp->state); | |
1da177e4 LT |
534 | return 0; |
535 | } | |
536 | ||
537 | #define SM_my_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN)) | |
2ca7754d CL |
538 | #define SM_my_id_sz (SM_my_name_sz+3) |
539 | #define SM_mon_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN)) | |
540 | #define SM_mon_id_sz (SM_mon_name_sz+SM_my_id_sz) | |
0490a54a CL |
541 | #define SM_priv_sz (XDR_QUADLEN(SM_PRIV_SIZE)) |
542 | #define SM_mon_sz (SM_mon_id_sz+SM_priv_sz) | |
1da177e4 LT |
543 | #define SM_monres_sz 2 |
544 | #define SM_unmonres_sz 1 | |
545 | ||
1da177e4 | 546 | static struct rpc_procinfo nsm_procedures[] = { |
36e8e668 CL |
547 | [NSMPROC_MON] = { |
548 | .p_proc = NSMPROC_MON, | |
03eb1dcb CL |
549 | .p_encode = (kxdrproc_t)xdr_enc_mon, |
550 | .p_decode = (kxdrproc_t)xdr_dec_stat_res, | |
2bea90d4 CL |
551 | .p_arglen = SM_mon_sz, |
552 | .p_replen = SM_monres_sz, | |
36e8e668 | 553 | .p_statidx = NSMPROC_MON, |
cc0175c1 | 554 | .p_name = "MONITOR", |
1da177e4 | 555 | }, |
36e8e668 CL |
556 | [NSMPROC_UNMON] = { |
557 | .p_proc = NSMPROC_UNMON, | |
03eb1dcb CL |
558 | .p_encode = (kxdrproc_t)xdr_enc_unmon, |
559 | .p_decode = (kxdrproc_t)xdr_dec_stat, | |
2bea90d4 CL |
560 | .p_arglen = SM_mon_id_sz, |
561 | .p_replen = SM_unmonres_sz, | |
36e8e668 | 562 | .p_statidx = NSMPROC_UNMON, |
cc0175c1 | 563 | .p_name = "UNMONITOR", |
1da177e4 LT |
564 | }, |
565 | }; | |
566 | ||
567 | static struct rpc_version nsm_version1 = { | |
e8c96f8c TK |
568 | .number = 1, |
569 | .nrprocs = ARRAY_SIZE(nsm_procedures), | |
1da177e4 LT |
570 | .procs = nsm_procedures |
571 | }; | |
572 | ||
573 | static struct rpc_version * nsm_version[] = { | |
574 | [1] = &nsm_version1, | |
575 | }; | |
576 | ||
577 | static struct rpc_stat nsm_stats; | |
578 | ||
579 | static struct rpc_program nsm_program = { | |
580 | .name = "statd", | |
36e8e668 | 581 | .number = NSM_PROGRAM, |
e8c96f8c | 582 | .nrvers = ARRAY_SIZE(nsm_version), |
1da177e4 LT |
583 | .version = nsm_version, |
584 | .stats = &nsm_stats | |
585 | }; |