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 LT |
18 | |
19 | #define NLMDBG_FACILITY NLMDBG_MONITOR | |
36e8e668 CL |
20 | #define NSM_PROGRAM 100024 |
21 | #define NSM_VERSION 1 | |
22 | ||
23 | enum { | |
24 | NSMPROC_NULL, | |
25 | NSMPROC_STAT, | |
26 | NSMPROC_MON, | |
27 | NSMPROC_UNMON, | |
28 | NSMPROC_UNMON_ALL, | |
29 | NSMPROC_SIMU_CRASH, | |
30 | NSMPROC_NOTIFY, | |
31 | }; | |
1da177e4 | 32 | |
9c1bfd03 | 33 | struct nsm_args { |
cab2d3c9 | 34 | struct nsm_private *priv; |
9c1bfd03 CL |
35 | u32 prog; /* RPC callback info */ |
36 | u32 vers; | |
37 | u32 proc; | |
38 | ||
39 | char *mon_name; | |
40 | }; | |
41 | ||
42 | struct nsm_res { | |
43 | u32 status; | |
44 | u32 state; | |
45 | }; | |
46 | ||
1da177e4 | 47 | static struct rpc_program nsm_program; |
67c6d107 CL |
48 | static LIST_HEAD(nsm_handles); |
49 | static DEFINE_SPINLOCK(nsm_lock); | |
1da177e4 LT |
50 | |
51 | /* | |
52 | * Local NSM state | |
53 | */ | |
b7ba597f CL |
54 | int __read_mostly nsm_local_state; |
55 | int __read_mostly nsm_use_hostnames; | |
1da177e4 | 56 | |
8529bc51 CL |
57 | static inline struct sockaddr *nsm_addr(const struct nsm_handle *nsm) |
58 | { | |
59 | return (struct sockaddr *)&nsm->sm_addr; | |
60 | } | |
61 | ||
67c6d107 CL |
62 | static void nsm_display_ipv4_address(const struct sockaddr *sap, char *buf, |
63 | const size_t len) | |
64 | { | |
65 | const struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
66 | snprintf(buf, len, "%pI4", &sin->sin_addr.s_addr); | |
67 | } | |
68 | ||
69 | static void nsm_display_ipv6_address(const struct sockaddr *sap, char *buf, | |
70 | const size_t len) | |
71 | { | |
72 | const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
73 | ||
74 | if (ipv6_addr_v4mapped(&sin6->sin6_addr)) | |
75 | snprintf(buf, len, "%pI4", &sin6->sin6_addr.s6_addr32[3]); | |
76 | else if (sin6->sin6_scope_id != 0) | |
77 | snprintf(buf, len, "%pI6%%%u", &sin6->sin6_addr, | |
78 | sin6->sin6_scope_id); | |
79 | else | |
80 | snprintf(buf, len, "%pI6", &sin6->sin6_addr); | |
81 | } | |
82 | ||
83 | static void nsm_display_address(const struct sockaddr *sap, | |
84 | char *buf, const size_t len) | |
85 | { | |
86 | switch (sap->sa_family) { | |
87 | case AF_INET: | |
88 | nsm_display_ipv4_address(sap, buf, len); | |
89 | break; | |
90 | case AF_INET6: | |
91 | nsm_display_ipv6_address(sap, buf, len); | |
92 | break; | |
93 | default: | |
94 | snprintf(buf, len, "unsupported address family"); | |
95 | break; | |
96 | } | |
97 | } | |
98 | ||
49b5699b CL |
99 | static struct rpc_clnt *nsm_create(void) |
100 | { | |
101 | struct sockaddr_in sin = { | |
102 | .sin_family = AF_INET, | |
103 | .sin_addr.s_addr = htonl(INADDR_LOOPBACK), | |
104 | }; | |
105 | struct rpc_create_args args = { | |
106 | .protocol = XPRT_TRANSPORT_UDP, | |
107 | .address = (struct sockaddr *)&sin, | |
108 | .addrsize = sizeof(sin), | |
109 | .servername = "rpc.statd", | |
110 | .program = &nsm_program, | |
111 | .version = NSM_VERSION, | |
112 | .authflavor = RPC_AUTH_NULL, | |
113 | }; | |
114 | ||
115 | return rpc_create(&args); | |
116 | } | |
117 | ||
118 | static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res) | |
1da177e4 LT |
119 | { |
120 | struct rpc_clnt *clnt; | |
121 | int status; | |
a4846750 | 122 | struct nsm_args args = { |
cab2d3c9 | 123 | .priv = &nsm->sm_priv, |
a4846750 CL |
124 | .prog = NLM_PROGRAM, |
125 | .vers = 3, | |
126 | .proc = NLMPROC_NSM_NOTIFY, | |
29ed1407 | 127 | .mon_name = nsm->sm_mon_name, |
a4846750 | 128 | }; |
dead28da CL |
129 | struct rpc_message msg = { |
130 | .rpc_argp = &args, | |
131 | .rpc_resp = res, | |
132 | }; | |
1da177e4 LT |
133 | |
134 | clnt = nsm_create(); | |
135 | if (IS_ERR(clnt)) { | |
136 | status = PTR_ERR(clnt); | |
5acf4315 CL |
137 | dprintk("lockd: failed to create NSM upcall transport, " |
138 | "status=%d\n", status); | |
1da177e4 LT |
139 | goto out; |
140 | } | |
141 | ||
1da177e4 LT |
142 | memset(res, 0, sizeof(*res)); |
143 | ||
dead28da CL |
144 | msg.rpc_proc = &clnt->cl_procinfo[proc]; |
145 | status = rpc_call_sync(clnt, &msg, 0); | |
1da177e4 | 146 | if (status < 0) |
5acf4315 CL |
147 | dprintk("lockd: NSM upcall RPC failed, status=%d\n", |
148 | status); | |
1da177e4 LT |
149 | else |
150 | status = 0; | |
90c5755f | 151 | rpc_shutdown_client(clnt); |
1da177e4 LT |
152 | out: |
153 | return status; | |
154 | } | |
155 | ||
1e49323c CL |
156 | /** |
157 | * nsm_monitor - Notify a peer in case we reboot | |
158 | * @host: pointer to nlm_host of peer to notify | |
159 | * | |
160 | * If this peer is not already monitored, this function sends an | |
161 | * upcall to the local rpc.statd to record the name/address of | |
162 | * the peer to notify in case we reboot. | |
163 | * | |
164 | * Returns zero if the peer is monitored by the local rpc.statd; | |
165 | * otherwise a negative errno value is returned. | |
1da177e4 | 166 | */ |
1e49323c | 167 | int nsm_monitor(const struct nlm_host *host) |
1da177e4 | 168 | { |
8dead0db | 169 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 LT |
170 | struct nsm_res res; |
171 | int status; | |
172 | ||
9fee4902 | 173 | dprintk("lockd: nsm_monitor(%s)\n", nsm->sm_name); |
8dead0db OK |
174 | |
175 | if (nsm->sm_monitored) | |
977faf39 | 176 | return 0; |
1da177e4 | 177 | |
29ed1407 CL |
178 | /* |
179 | * Choose whether to record the caller_name or IP address of | |
180 | * this peer in the local rpc.statd's database. | |
181 | */ | |
182 | nsm->sm_mon_name = nsm_use_hostnames ? nsm->sm_name : nsm->sm_addrbuf; | |
183 | ||
36e8e668 | 184 | status = nsm_mon_unmon(nsm, NSMPROC_MON, &res); |
5d254b11 CL |
185 | if (res.status != 0) |
186 | status = -EIO; | |
187 | if (status < 0) | |
9fee4902 | 188 | printk(KERN_NOTICE "lockd: cannot monitor %s\n", nsm->sm_name); |
1da177e4 | 189 | else |
8dead0db | 190 | nsm->sm_monitored = 1; |
1da177e4 LT |
191 | return status; |
192 | } | |
193 | ||
356c3eb4 CL |
194 | /** |
195 | * nsm_unmonitor - Unregister peer notification | |
196 | * @host: pointer to nlm_host of peer to stop monitoring | |
197 | * | |
198 | * If this peer is monitored, this function sends an upcall to | |
199 | * tell the local rpc.statd not to send this peer a notification | |
200 | * when we reboot. | |
1da177e4 | 201 | */ |
356c3eb4 | 202 | void nsm_unmonitor(const struct nlm_host *host) |
1da177e4 | 203 | { |
8dead0db | 204 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 | 205 | struct nsm_res res; |
356c3eb4 | 206 | int status; |
1da177e4 | 207 | |
9502c522 OK |
208 | if (atomic_read(&nsm->sm_count) == 1 |
209 | && nsm->sm_monitored && !nsm->sm_sticky) { | |
9fee4902 | 210 | dprintk("lockd: nsm_unmonitor(%s)\n", nsm->sm_name); |
9502c522 | 211 | |
36e8e668 | 212 | status = nsm_mon_unmon(nsm, NSMPROC_UNMON, &res); |
0c7aef45 CL |
213 | if (res.status != 0) |
214 | status = -EIO; | |
977faf39 | 215 | if (status < 0) |
9502c522 | 216 | printk(KERN_NOTICE "lockd: cannot unmonitor %s\n", |
9fee4902 | 217 | nsm->sm_name); |
9502c522 OK |
218 | else |
219 | nsm->sm_monitored = 0; | |
977faf39 | 220 | } |
1da177e4 LT |
221 | } |
222 | ||
3420a8c4 CL |
223 | static struct nsm_handle *nsm_lookup_hostname(const char *hostname, |
224 | const size_t len) | |
225 | { | |
226 | struct nsm_handle *nsm; | |
227 | ||
228 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
229 | if (strlen(nsm->sm_name) == len && | |
230 | memcmp(nsm->sm_name, hostname, len) == 0) | |
231 | return nsm; | |
232 | return NULL; | |
233 | } | |
234 | ||
77a3ef33 CL |
235 | static struct nsm_handle *nsm_lookup_addr(const struct sockaddr *sap) |
236 | { | |
237 | struct nsm_handle *nsm; | |
238 | ||
239 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
240 | if (nlm_cmp_addr(nsm_addr(nsm), sap)) | |
241 | return nsm; | |
242 | return NULL; | |
243 | } | |
244 | ||
3420a8c4 CL |
245 | static struct nsm_handle *nsm_lookup_priv(const struct nsm_private *priv) |
246 | { | |
247 | struct nsm_handle *nsm; | |
248 | ||
249 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
250 | if (memcmp(nsm->sm_priv.data, priv->data, | |
251 | sizeof(priv->data)) == 0) | |
252 | return nsm; | |
253 | return NULL; | |
254 | } | |
255 | ||
7e44d3be CL |
256 | /* |
257 | * Construct a unique cookie to match this nsm_handle to this monitored | |
258 | * host. It is passed to the local rpc.statd via NSMPROC_MON, and | |
259 | * returned via NLMPROC_SM_NOTIFY, in the "priv" field of these | |
260 | * requests. | |
261 | * | |
94da7663 CL |
262 | * The NSM protocol requires that these cookies be unique while the |
263 | * system is running. We prefer a stronger requirement of making them | |
264 | * unique across reboots. If user space bugs cause a stale cookie to | |
265 | * be sent to the kernel, it could cause the wrong host to lose its | |
266 | * lock state if cookies were not unique across reboots. | |
267 | * | |
268 | * The cookies are exposed only to local user space via loopback. They | |
269 | * do not appear on the physical network. If we want greater security | |
270 | * for some reason, nsm_init_private() could perform a one-way hash to | |
271 | * obscure the contents of the cookie. | |
7e44d3be CL |
272 | */ |
273 | static void nsm_init_private(struct nsm_handle *nsm) | |
274 | { | |
94da7663 CL |
275 | u64 *p = (u64 *)&nsm->sm_priv.data; |
276 | struct timespec ts; | |
277 | ||
278 | ktime_get_ts(&ts); | |
279 | *p++ = timespec_to_ns(&ts); | |
280 | *p = (unsigned long)nsm; | |
7e44d3be CL |
281 | } |
282 | ||
b39b897c CL |
283 | static struct nsm_handle *nsm_create_handle(const struct sockaddr *sap, |
284 | const size_t salen, | |
285 | const char *hostname, | |
286 | const size_t hostname_len) | |
287 | { | |
288 | struct nsm_handle *new; | |
289 | ||
290 | new = kzalloc(sizeof(*new) + hostname_len + 1, GFP_KERNEL); | |
291 | if (unlikely(new == NULL)) | |
292 | return NULL; | |
293 | ||
294 | atomic_set(&new->sm_count, 1); | |
295 | new->sm_name = (char *)(new + 1); | |
296 | memcpy(nsm_addr(new), sap, salen); | |
297 | new->sm_addrlen = salen; | |
298 | nsm_init_private(new); | |
299 | nsm_display_address((const struct sockaddr *)&new->sm_addr, | |
300 | new->sm_addrbuf, sizeof(new->sm_addrbuf)); | |
301 | memcpy(new->sm_name, hostname, hostname_len); | |
302 | new->sm_name[hostname_len] = '\0'; | |
303 | ||
304 | return new; | |
305 | } | |
306 | ||
67c6d107 | 307 | /** |
92fd91b9 | 308 | * nsm_get_handle - Find or create a cached nsm_handle |
67c6d107 CL |
309 | * @sap: pointer to socket address of handle to find |
310 | * @salen: length of socket address | |
311 | * @hostname: pointer to C string containing hostname to find | |
312 | * @hostname_len: length of C string | |
67c6d107 | 313 | * |
92fd91b9 | 314 | * Behavior is modulated by the global nsm_use_hostnames variable. |
67c6d107 | 315 | * |
92fd91b9 CL |
316 | * Returns a cached nsm_handle after bumping its ref count, or |
317 | * returns a fresh nsm_handle if a handle that matches @sap and/or | |
318 | * @hostname cannot be found in the handle cache. Returns NULL if | |
319 | * an error occurs. | |
67c6d107 | 320 | */ |
92fd91b9 CL |
321 | struct nsm_handle *nsm_get_handle(const struct sockaddr *sap, |
322 | const size_t salen, const char *hostname, | |
323 | const size_t hostname_len) | |
67c6d107 | 324 | { |
77a3ef33 | 325 | struct nsm_handle *cached, *new = NULL; |
67c6d107 | 326 | |
67c6d107 CL |
327 | if (hostname && memchr(hostname, '/', hostname_len) != NULL) { |
328 | if (printk_ratelimit()) { | |
329 | printk(KERN_WARNING "Invalid hostname \"%.*s\" " | |
330 | "in NFS lock request\n", | |
331 | (int)hostname_len, hostname); | |
332 | } | |
333 | return NULL; | |
334 | } | |
335 | ||
336 | retry: | |
337 | spin_lock(&nsm_lock); | |
77a3ef33 CL |
338 | |
339 | if (nsm_use_hostnames && hostname != NULL) | |
340 | cached = nsm_lookup_hostname(hostname, hostname_len); | |
341 | else | |
342 | cached = nsm_lookup_addr(sap); | |
343 | ||
344 | if (cached != NULL) { | |
345 | atomic_inc(&cached->sm_count); | |
346 | spin_unlock(&nsm_lock); | |
347 | kfree(new); | |
348 | dprintk("lockd: found nsm_handle for %s (%s), " | |
349 | "cnt %d\n", cached->sm_name, | |
350 | cached->sm_addrbuf, | |
351 | atomic_read(&cached->sm_count)); | |
352 | return cached; | |
67c6d107 | 353 | } |
77a3ef33 CL |
354 | |
355 | if (new != NULL) { | |
356 | list_add(&new->sm_link, &nsm_handles); | |
357 | spin_unlock(&nsm_lock); | |
5cf1c4b1 | 358 | dprintk("lockd: created nsm_handle for %s (%s)\n", |
77a3ef33 CL |
359 | new->sm_name, new->sm_addrbuf); |
360 | return new; | |
67c6d107 | 361 | } |
77a3ef33 | 362 | |
67c6d107 CL |
363 | spin_unlock(&nsm_lock); |
364 | ||
77a3ef33 CL |
365 | new = nsm_create_handle(sap, salen, hostname, hostname_len); |
366 | if (unlikely(new == NULL)) | |
67c6d107 | 367 | return NULL; |
67c6d107 | 368 | goto retry; |
67c6d107 CL |
369 | } |
370 | ||
3420a8c4 CL |
371 | /** |
372 | * nsm_reboot_lookup - match NLMPROC_SM_NOTIFY arguments to an nsm_handle | |
373 | * @info: pointer to NLMPROC_SM_NOTIFY arguments | |
374 | * | |
375 | * Returns a matching nsm_handle if found in the nsm cache; the returned | |
376 | * nsm_handle's reference count is bumped and sm_monitored is cleared. | |
377 | * Otherwise returns NULL if some error occurred. | |
378 | */ | |
379 | struct nsm_handle *nsm_reboot_lookup(const struct nlm_reboot *info) | |
380 | { | |
381 | struct nsm_handle *cached; | |
382 | ||
383 | spin_lock(&nsm_lock); | |
384 | ||
94da7663 | 385 | cached = nsm_lookup_priv(&info->priv); |
3420a8c4 CL |
386 | if (unlikely(cached == NULL)) { |
387 | spin_unlock(&nsm_lock); | |
388 | dprintk("lockd: never saw rebooted peer '%.*s' before\n", | |
389 | info->len, info->mon); | |
390 | return cached; | |
391 | } | |
392 | ||
393 | atomic_inc(&cached->sm_count); | |
394 | spin_unlock(&nsm_lock); | |
395 | ||
396 | /* | |
397 | * During subsequent lock activity, force a fresh | |
398 | * notification to be set up for this host. | |
399 | */ | |
400 | cached->sm_monitored = 0; | |
401 | ||
402 | dprintk("lockd: host %s (%s) rebooted, cnt %d\n", | |
403 | cached->sm_name, cached->sm_addrbuf, | |
404 | atomic_read(&cached->sm_count)); | |
405 | return cached; | |
406 | } | |
407 | ||
67c6d107 CL |
408 | /** |
409 | * nsm_release - Release an NSM handle | |
410 | * @nsm: pointer to handle to be released | |
411 | * | |
412 | */ | |
413 | void nsm_release(struct nsm_handle *nsm) | |
414 | { | |
67c6d107 CL |
415 | if (atomic_dec_and_lock(&nsm->sm_count, &nsm_lock)) { |
416 | list_del(&nsm->sm_link); | |
417 | spin_unlock(&nsm_lock); | |
5cf1c4b1 CL |
418 | dprintk("lockd: destroyed nsm_handle for %s (%s)\n", |
419 | nsm->sm_name, nsm->sm_addrbuf); | |
67c6d107 CL |
420 | kfree(nsm); |
421 | } | |
422 | } | |
423 | ||
1da177e4 LT |
424 | /* |
425 | * XDR functions for NSM. | |
2ca7754d CL |
426 | * |
427 | * See http://www.opengroup.org/ for details on the Network | |
428 | * Status Monitor wire protocol. | |
1da177e4 LT |
429 | */ |
430 | ||
03eb1dcb | 431 | static int encode_nsm_string(struct xdr_stream *xdr, const char *string) |
099bd05f | 432 | { |
03eb1dcb CL |
433 | const u32 len = strlen(string); |
434 | __be32 *p; | |
435 | ||
436 | if (unlikely(len > SM_MAXSTRLEN)) | |
437 | return -EIO; | |
438 | p = xdr_reserve_space(xdr, sizeof(u32) + len); | |
439 | if (unlikely(p == NULL)) | |
440 | return -EIO; | |
441 | xdr_encode_opaque(p, string, len); | |
442 | return 0; | |
099bd05f CL |
443 | } |
444 | ||
49695174 CL |
445 | /* |
446 | * "mon_name" specifies the host to be monitored. | |
49695174 | 447 | */ |
03eb1dcb | 448 | static int encode_mon_name(struct xdr_stream *xdr, const struct nsm_args *argp) |
49695174 | 449 | { |
03eb1dcb | 450 | return encode_nsm_string(xdr, argp->mon_name); |
49695174 CL |
451 | } |
452 | ||
850c95fd CL |
453 | /* |
454 | * The "my_id" argument specifies the hostname and RPC procedure | |
455 | * to be called when the status manager receives notification | |
36e8e668 | 456 | * (via the NLMPROC_SM_NOTIFY call) that the state of host "mon_name" |
850c95fd CL |
457 | * has changed. |
458 | */ | |
03eb1dcb | 459 | static int encode_my_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
850c95fd | 460 | { |
03eb1dcb CL |
461 | int status; |
462 | __be32 *p; | |
463 | ||
464 | status = encode_nsm_string(xdr, utsname()->nodename); | |
465 | if (unlikely(status != 0)) | |
466 | return status; | |
467 | p = xdr_reserve_space(xdr, 3 * sizeof(u32)); | |
468 | if (unlikely(p == NULL)) | |
469 | return -EIO; | |
850c95fd CL |
470 | *p++ = htonl(argp->prog); |
471 | *p++ = htonl(argp->vers); | |
472 | *p++ = htonl(argp->proc); | |
03eb1dcb | 473 | return 0; |
850c95fd CL |
474 | } |
475 | ||
ea72a7f1 CL |
476 | /* |
477 | * The "mon_id" argument specifies the non-private arguments | |
36e8e668 | 478 | * of an NSMPROC_MON or NSMPROC_UNMON call. |
ea72a7f1 | 479 | */ |
03eb1dcb | 480 | static int encode_mon_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
ea72a7f1 | 481 | { |
03eb1dcb | 482 | int status; |
ea72a7f1 | 483 | |
03eb1dcb CL |
484 | status = encode_mon_name(xdr, argp); |
485 | if (unlikely(status != 0)) | |
486 | return status; | |
487 | return encode_my_id(xdr, argp); | |
ea72a7f1 CL |
488 | } |
489 | ||
0490a54a CL |
490 | /* |
491 | * The "priv" argument may contain private information required | |
36e8e668 CL |
492 | * by the NSMPROC_MON call. This information will be supplied in the |
493 | * NLMPROC_SM_NOTIFY call. | |
0490a54a | 494 | */ |
03eb1dcb | 495 | static int encode_priv(struct xdr_stream *xdr, const struct nsm_args *argp) |
0490a54a | 496 | { |
03eb1dcb CL |
497 | __be32 *p; |
498 | ||
499 | p = xdr_reserve_space(xdr, SM_PRIV_SIZE); | |
500 | if (unlikely(p == NULL)) | |
501 | return -EIO; | |
cab2d3c9 | 502 | xdr_encode_opaque_fixed(p, argp->priv->data, SM_PRIV_SIZE); |
03eb1dcb | 503 | return 0; |
0490a54a CL |
504 | } |
505 | ||
03eb1dcb CL |
506 | static int xdr_enc_mon(struct rpc_rqst *req, __be32 *p, |
507 | const struct nsm_args *argp) | |
1da177e4 | 508 | { |
03eb1dcb CL |
509 | struct xdr_stream xdr; |
510 | int status; | |
0490a54a | 511 | |
03eb1dcb CL |
512 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
513 | status = encode_mon_id(&xdr, argp); | |
514 | if (unlikely(status)) | |
515 | return status; | |
516 | return encode_priv(&xdr, argp); | |
1da177e4 LT |
517 | } |
518 | ||
03eb1dcb CL |
519 | static int xdr_enc_unmon(struct rpc_rqst *req, __be32 *p, |
520 | const struct nsm_args *argp) | |
1da177e4 | 521 | { |
03eb1dcb CL |
522 | struct xdr_stream xdr; |
523 | ||
524 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
525 | return encode_mon_id(&xdr, argp); | |
1da177e4 LT |
526 | } |
527 | ||
03eb1dcb CL |
528 | static int xdr_dec_stat_res(struct rpc_rqst *rqstp, __be32 *p, |
529 | struct nsm_res *resp) | |
1da177e4 | 530 | { |
03eb1dcb CL |
531 | struct xdr_stream xdr; |
532 | ||
533 | xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); | |
534 | p = xdr_inline_decode(&xdr, 2 * sizeof(u32)); | |
535 | if (unlikely(p == NULL)) | |
536 | return -EIO; | |
1da177e4 | 537 | resp->status = ntohl(*p++); |
03eb1dcb CL |
538 | resp->state = ntohl(*p); |
539 | ||
540 | dprintk("lockd: xdr_dec_stat_res status %d state %d\n", | |
1da177e4 LT |
541 | resp->status, resp->state); |
542 | return 0; | |
543 | } | |
544 | ||
03eb1dcb CL |
545 | static int xdr_dec_stat(struct rpc_rqst *rqstp, __be32 *p, |
546 | struct nsm_res *resp) | |
1da177e4 | 547 | { |
03eb1dcb CL |
548 | struct xdr_stream xdr; |
549 | ||
550 | xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); | |
551 | p = xdr_inline_decode(&xdr, sizeof(u32)); | |
552 | if (unlikely(p == NULL)) | |
553 | return -EIO; | |
554 | resp->state = ntohl(*p); | |
555 | ||
556 | dprintk("lockd: xdr_dec_stat state %d\n", resp->state); | |
1da177e4 LT |
557 | return 0; |
558 | } | |
559 | ||
560 | #define SM_my_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN)) | |
2ca7754d CL |
561 | #define SM_my_id_sz (SM_my_name_sz+3) |
562 | #define SM_mon_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN)) | |
563 | #define SM_mon_id_sz (SM_mon_name_sz+SM_my_id_sz) | |
0490a54a CL |
564 | #define SM_priv_sz (XDR_QUADLEN(SM_PRIV_SIZE)) |
565 | #define SM_mon_sz (SM_mon_id_sz+SM_priv_sz) | |
1da177e4 LT |
566 | #define SM_monres_sz 2 |
567 | #define SM_unmonres_sz 1 | |
568 | ||
1da177e4 | 569 | static struct rpc_procinfo nsm_procedures[] = { |
36e8e668 CL |
570 | [NSMPROC_MON] = { |
571 | .p_proc = NSMPROC_MON, | |
03eb1dcb CL |
572 | .p_encode = (kxdrproc_t)xdr_enc_mon, |
573 | .p_decode = (kxdrproc_t)xdr_dec_stat_res, | |
2bea90d4 CL |
574 | .p_arglen = SM_mon_sz, |
575 | .p_replen = SM_monres_sz, | |
36e8e668 | 576 | .p_statidx = NSMPROC_MON, |
cc0175c1 | 577 | .p_name = "MONITOR", |
1da177e4 | 578 | }, |
36e8e668 CL |
579 | [NSMPROC_UNMON] = { |
580 | .p_proc = NSMPROC_UNMON, | |
03eb1dcb CL |
581 | .p_encode = (kxdrproc_t)xdr_enc_unmon, |
582 | .p_decode = (kxdrproc_t)xdr_dec_stat, | |
2bea90d4 CL |
583 | .p_arglen = SM_mon_id_sz, |
584 | .p_replen = SM_unmonres_sz, | |
36e8e668 | 585 | .p_statidx = NSMPROC_UNMON, |
cc0175c1 | 586 | .p_name = "UNMONITOR", |
1da177e4 LT |
587 | }, |
588 | }; | |
589 | ||
590 | static struct rpc_version nsm_version1 = { | |
e8c96f8c TK |
591 | .number = 1, |
592 | .nrprocs = ARRAY_SIZE(nsm_procedures), | |
1da177e4 LT |
593 | .procs = nsm_procedures |
594 | }; | |
595 | ||
596 | static struct rpc_version * nsm_version[] = { | |
597 | [1] = &nsm_version1, | |
598 | }; | |
599 | ||
600 | static struct rpc_stat nsm_stats; | |
601 | ||
602 | static struct rpc_program nsm_program = { | |
603 | .name = "statd", | |
36e8e668 | 604 | .number = NSM_PROGRAM, |
e8c96f8c | 605 | .nrvers = ARRAY_SIZE(nsm_version), |
1da177e4 LT |
606 | .version = nsm_version, |
607 | .stats = &nsm_stats | |
608 | }; |