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 | ||
67c6d107 CL |
64 | static void nsm_display_ipv4_address(const struct sockaddr *sap, char *buf, |
65 | const size_t len) | |
66 | { | |
67 | const struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
68 | snprintf(buf, len, "%pI4", &sin->sin_addr.s_addr); | |
69 | } | |
70 | ||
71 | static void nsm_display_ipv6_address(const struct sockaddr *sap, char *buf, | |
72 | const size_t len) | |
73 | { | |
74 | const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
75 | ||
76 | if (ipv6_addr_v4mapped(&sin6->sin6_addr)) | |
77 | snprintf(buf, len, "%pI4", &sin6->sin6_addr.s6_addr32[3]); | |
78 | else if (sin6->sin6_scope_id != 0) | |
79 | snprintf(buf, len, "%pI6%%%u", &sin6->sin6_addr, | |
80 | sin6->sin6_scope_id); | |
81 | else | |
82 | snprintf(buf, len, "%pI6", &sin6->sin6_addr); | |
83 | } | |
84 | ||
85 | static void nsm_display_address(const struct sockaddr *sap, | |
86 | char *buf, const size_t len) | |
87 | { | |
88 | switch (sap->sa_family) { | |
89 | case AF_INET: | |
90 | nsm_display_ipv4_address(sap, buf, len); | |
91 | break; | |
92 | case AF_INET6: | |
93 | nsm_display_ipv6_address(sap, buf, len); | |
94 | break; | |
95 | default: | |
96 | snprintf(buf, len, "unsupported address family"); | |
97 | break; | |
98 | } | |
99 | } | |
100 | ||
49b5699b CL |
101 | static struct rpc_clnt *nsm_create(void) |
102 | { | |
103 | struct sockaddr_in sin = { | |
104 | .sin_family = AF_INET, | |
105 | .sin_addr.s_addr = htonl(INADDR_LOOPBACK), | |
106 | }; | |
107 | struct rpc_create_args args = { | |
108 | .protocol = XPRT_TRANSPORT_UDP, | |
109 | .address = (struct sockaddr *)&sin, | |
110 | .addrsize = sizeof(sin), | |
111 | .servername = "rpc.statd", | |
112 | .program = &nsm_program, | |
113 | .version = NSM_VERSION, | |
114 | .authflavor = RPC_AUTH_NULL, | |
0e5c2632 | 115 | .flags = RPC_CLNT_CREATE_NOPING, |
49b5699b CL |
116 | }; |
117 | ||
118 | return rpc_create(&args); | |
119 | } | |
120 | ||
121 | static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res) | |
1da177e4 LT |
122 | { |
123 | struct rpc_clnt *clnt; | |
124 | int status; | |
a4846750 | 125 | struct nsm_args args = { |
cab2d3c9 | 126 | .priv = &nsm->sm_priv, |
a4846750 CL |
127 | .prog = NLM_PROGRAM, |
128 | .vers = 3, | |
129 | .proc = NLMPROC_NSM_NOTIFY, | |
29ed1407 | 130 | .mon_name = nsm->sm_mon_name, |
a4846750 | 131 | }; |
dead28da CL |
132 | struct rpc_message msg = { |
133 | .rpc_argp = &args, | |
134 | .rpc_resp = res, | |
135 | }; | |
1da177e4 LT |
136 | |
137 | clnt = nsm_create(); | |
138 | if (IS_ERR(clnt)) { | |
139 | status = PTR_ERR(clnt); | |
5acf4315 CL |
140 | dprintk("lockd: failed to create NSM upcall transport, " |
141 | "status=%d\n", status); | |
1da177e4 LT |
142 | goto out; |
143 | } | |
144 | ||
1da177e4 LT |
145 | memset(res, 0, sizeof(*res)); |
146 | ||
dead28da CL |
147 | msg.rpc_proc = &clnt->cl_procinfo[proc]; |
148 | status = rpc_call_sync(clnt, &msg, 0); | |
1da177e4 | 149 | if (status < 0) |
5acf4315 CL |
150 | dprintk("lockd: NSM upcall RPC failed, status=%d\n", |
151 | status); | |
1da177e4 LT |
152 | else |
153 | status = 0; | |
90c5755f | 154 | rpc_shutdown_client(clnt); |
1da177e4 LT |
155 | out: |
156 | return status; | |
157 | } | |
158 | ||
1e49323c CL |
159 | /** |
160 | * nsm_monitor - Notify a peer in case we reboot | |
161 | * @host: pointer to nlm_host of peer to notify | |
162 | * | |
163 | * If this peer is not already monitored, this function sends an | |
164 | * upcall to the local rpc.statd to record the name/address of | |
165 | * the peer to notify in case we reboot. | |
166 | * | |
167 | * Returns zero if the peer is monitored by the local rpc.statd; | |
168 | * otherwise a negative errno value is returned. | |
1da177e4 | 169 | */ |
1e49323c | 170 | int nsm_monitor(const struct nlm_host *host) |
1da177e4 | 171 | { |
8dead0db | 172 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 LT |
173 | struct nsm_res res; |
174 | int status; | |
175 | ||
9fee4902 | 176 | dprintk("lockd: nsm_monitor(%s)\n", nsm->sm_name); |
8dead0db OK |
177 | |
178 | if (nsm->sm_monitored) | |
977faf39 | 179 | return 0; |
1da177e4 | 180 | |
29ed1407 CL |
181 | /* |
182 | * Choose whether to record the caller_name or IP address of | |
183 | * this peer in the local rpc.statd's database. | |
184 | */ | |
185 | nsm->sm_mon_name = nsm_use_hostnames ? nsm->sm_name : nsm->sm_addrbuf; | |
186 | ||
36e8e668 | 187 | status = nsm_mon_unmon(nsm, NSMPROC_MON, &res); |
6c9dc425 | 188 | if (unlikely(res.status != 0)) |
5d254b11 | 189 | status = -EIO; |
6c9dc425 | 190 | if (unlikely(status < 0)) { |
9fee4902 | 191 | printk(KERN_NOTICE "lockd: cannot monitor %s\n", nsm->sm_name); |
6c9dc425 CL |
192 | return status; |
193 | } | |
194 | ||
195 | nsm->sm_monitored = 1; | |
196 | if (unlikely(nsm_local_state != res.state)) { | |
197 | nsm_local_state = res.state; | |
198 | dprintk("lockd: NSM state changed to %d\n", nsm_local_state); | |
199 | } | |
200 | return 0; | |
1da177e4 LT |
201 | } |
202 | ||
356c3eb4 CL |
203 | /** |
204 | * nsm_unmonitor - Unregister peer notification | |
205 | * @host: pointer to nlm_host of peer to stop monitoring | |
206 | * | |
207 | * If this peer is monitored, this function sends an upcall to | |
208 | * tell the local rpc.statd not to send this peer a notification | |
209 | * when we reboot. | |
1da177e4 | 210 | */ |
356c3eb4 | 211 | void nsm_unmonitor(const struct nlm_host *host) |
1da177e4 | 212 | { |
8dead0db | 213 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 | 214 | struct nsm_res res; |
356c3eb4 | 215 | int status; |
1da177e4 | 216 | |
9502c522 OK |
217 | if (atomic_read(&nsm->sm_count) == 1 |
218 | && nsm->sm_monitored && !nsm->sm_sticky) { | |
9fee4902 | 219 | dprintk("lockd: nsm_unmonitor(%s)\n", nsm->sm_name); |
9502c522 | 220 | |
36e8e668 | 221 | status = nsm_mon_unmon(nsm, NSMPROC_UNMON, &res); |
0c7aef45 CL |
222 | if (res.status != 0) |
223 | status = -EIO; | |
977faf39 | 224 | if (status < 0) |
9502c522 | 225 | printk(KERN_NOTICE "lockd: cannot unmonitor %s\n", |
9fee4902 | 226 | nsm->sm_name); |
9502c522 OK |
227 | else |
228 | nsm->sm_monitored = 0; | |
977faf39 | 229 | } |
1da177e4 LT |
230 | } |
231 | ||
3420a8c4 CL |
232 | static struct nsm_handle *nsm_lookup_hostname(const char *hostname, |
233 | const size_t len) | |
234 | { | |
235 | struct nsm_handle *nsm; | |
236 | ||
237 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
238 | if (strlen(nsm->sm_name) == len && | |
239 | memcmp(nsm->sm_name, hostname, len) == 0) | |
240 | return nsm; | |
241 | return NULL; | |
242 | } | |
243 | ||
77a3ef33 CL |
244 | static struct nsm_handle *nsm_lookup_addr(const struct sockaddr *sap) |
245 | { | |
246 | struct nsm_handle *nsm; | |
247 | ||
248 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
249 | if (nlm_cmp_addr(nsm_addr(nsm), sap)) | |
250 | return nsm; | |
251 | return NULL; | |
252 | } | |
253 | ||
3420a8c4 CL |
254 | static struct nsm_handle *nsm_lookup_priv(const struct nsm_private *priv) |
255 | { | |
256 | struct nsm_handle *nsm; | |
257 | ||
258 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
259 | if (memcmp(nsm->sm_priv.data, priv->data, | |
260 | sizeof(priv->data)) == 0) | |
261 | return nsm; | |
262 | return NULL; | |
263 | } | |
264 | ||
7e44d3be CL |
265 | /* |
266 | * Construct a unique cookie to match this nsm_handle to this monitored | |
267 | * host. It is passed to the local rpc.statd via NSMPROC_MON, and | |
268 | * returned via NLMPROC_SM_NOTIFY, in the "priv" field of these | |
269 | * requests. | |
270 | * | |
94da7663 CL |
271 | * The NSM protocol requires that these cookies be unique while the |
272 | * system is running. We prefer a stronger requirement of making them | |
273 | * unique across reboots. If user space bugs cause a stale cookie to | |
274 | * be sent to the kernel, it could cause the wrong host to lose its | |
275 | * lock state if cookies were not unique across reboots. | |
276 | * | |
277 | * The cookies are exposed only to local user space via loopback. They | |
278 | * do not appear on the physical network. If we want greater security | |
279 | * for some reason, nsm_init_private() could perform a one-way hash to | |
280 | * obscure the contents of the cookie. | |
7e44d3be CL |
281 | */ |
282 | static void nsm_init_private(struct nsm_handle *nsm) | |
283 | { | |
94da7663 CL |
284 | u64 *p = (u64 *)&nsm->sm_priv.data; |
285 | struct timespec ts; | |
ad5b365c | 286 | s64 ns; |
94da7663 CL |
287 | |
288 | ktime_get_ts(&ts); | |
ad5b365c MR |
289 | ns = timespec_to_ns(&ts); |
290 | put_unaligned(ns, p); | |
291 | put_unaligned((unsigned long)nsm, p + 1); | |
7e44d3be CL |
292 | } |
293 | ||
b39b897c CL |
294 | static struct nsm_handle *nsm_create_handle(const struct sockaddr *sap, |
295 | const size_t salen, | |
296 | const char *hostname, | |
297 | const size_t hostname_len) | |
298 | { | |
299 | struct nsm_handle *new; | |
300 | ||
301 | new = kzalloc(sizeof(*new) + hostname_len + 1, GFP_KERNEL); | |
302 | if (unlikely(new == NULL)) | |
303 | return NULL; | |
304 | ||
305 | atomic_set(&new->sm_count, 1); | |
306 | new->sm_name = (char *)(new + 1); | |
307 | memcpy(nsm_addr(new), sap, salen); | |
308 | new->sm_addrlen = salen; | |
309 | nsm_init_private(new); | |
310 | nsm_display_address((const struct sockaddr *)&new->sm_addr, | |
311 | new->sm_addrbuf, sizeof(new->sm_addrbuf)); | |
312 | memcpy(new->sm_name, hostname, hostname_len); | |
313 | new->sm_name[hostname_len] = '\0'; | |
314 | ||
315 | return new; | |
316 | } | |
317 | ||
67c6d107 | 318 | /** |
92fd91b9 | 319 | * nsm_get_handle - Find or create a cached nsm_handle |
67c6d107 CL |
320 | * @sap: pointer to socket address of handle to find |
321 | * @salen: length of socket address | |
322 | * @hostname: pointer to C string containing hostname to find | |
323 | * @hostname_len: length of C string | |
67c6d107 | 324 | * |
92fd91b9 | 325 | * Behavior is modulated by the global nsm_use_hostnames variable. |
67c6d107 | 326 | * |
92fd91b9 CL |
327 | * Returns a cached nsm_handle after bumping its ref count, or |
328 | * returns a fresh nsm_handle if a handle that matches @sap and/or | |
329 | * @hostname cannot be found in the handle cache. Returns NULL if | |
330 | * an error occurs. | |
67c6d107 | 331 | */ |
92fd91b9 CL |
332 | struct nsm_handle *nsm_get_handle(const struct sockaddr *sap, |
333 | const size_t salen, const char *hostname, | |
334 | const size_t hostname_len) | |
67c6d107 | 335 | { |
77a3ef33 | 336 | struct nsm_handle *cached, *new = NULL; |
67c6d107 | 337 | |
67c6d107 CL |
338 | if (hostname && memchr(hostname, '/', hostname_len) != NULL) { |
339 | if (printk_ratelimit()) { | |
340 | printk(KERN_WARNING "Invalid hostname \"%.*s\" " | |
341 | "in NFS lock request\n", | |
342 | (int)hostname_len, hostname); | |
343 | } | |
344 | return NULL; | |
345 | } | |
346 | ||
347 | retry: | |
348 | spin_lock(&nsm_lock); | |
77a3ef33 CL |
349 | |
350 | if (nsm_use_hostnames && hostname != NULL) | |
351 | cached = nsm_lookup_hostname(hostname, hostname_len); | |
352 | else | |
353 | cached = nsm_lookup_addr(sap); | |
354 | ||
355 | if (cached != NULL) { | |
356 | atomic_inc(&cached->sm_count); | |
357 | spin_unlock(&nsm_lock); | |
358 | kfree(new); | |
359 | dprintk("lockd: found nsm_handle for %s (%s), " | |
360 | "cnt %d\n", cached->sm_name, | |
361 | cached->sm_addrbuf, | |
362 | atomic_read(&cached->sm_count)); | |
363 | return cached; | |
67c6d107 | 364 | } |
77a3ef33 CL |
365 | |
366 | if (new != NULL) { | |
367 | list_add(&new->sm_link, &nsm_handles); | |
368 | spin_unlock(&nsm_lock); | |
5cf1c4b1 | 369 | dprintk("lockd: created nsm_handle for %s (%s)\n", |
77a3ef33 CL |
370 | new->sm_name, new->sm_addrbuf); |
371 | return new; | |
67c6d107 | 372 | } |
77a3ef33 | 373 | |
67c6d107 CL |
374 | spin_unlock(&nsm_lock); |
375 | ||
77a3ef33 CL |
376 | new = nsm_create_handle(sap, salen, hostname, hostname_len); |
377 | if (unlikely(new == NULL)) | |
67c6d107 | 378 | return NULL; |
67c6d107 | 379 | goto retry; |
67c6d107 CL |
380 | } |
381 | ||
3420a8c4 CL |
382 | /** |
383 | * nsm_reboot_lookup - match NLMPROC_SM_NOTIFY arguments to an nsm_handle | |
384 | * @info: pointer to NLMPROC_SM_NOTIFY arguments | |
385 | * | |
386 | * Returns a matching nsm_handle if found in the nsm cache; the returned | |
387 | * nsm_handle's reference count is bumped and sm_monitored is cleared. | |
388 | * Otherwise returns NULL if some error occurred. | |
389 | */ | |
390 | struct nsm_handle *nsm_reboot_lookup(const struct nlm_reboot *info) | |
391 | { | |
392 | struct nsm_handle *cached; | |
393 | ||
394 | spin_lock(&nsm_lock); | |
395 | ||
94da7663 | 396 | cached = nsm_lookup_priv(&info->priv); |
3420a8c4 CL |
397 | if (unlikely(cached == NULL)) { |
398 | spin_unlock(&nsm_lock); | |
399 | dprintk("lockd: never saw rebooted peer '%.*s' before\n", | |
400 | info->len, info->mon); | |
401 | return cached; | |
402 | } | |
403 | ||
404 | atomic_inc(&cached->sm_count); | |
405 | spin_unlock(&nsm_lock); | |
406 | ||
407 | /* | |
408 | * During subsequent lock activity, force a fresh | |
409 | * notification to be set up for this host. | |
410 | */ | |
411 | cached->sm_monitored = 0; | |
412 | ||
413 | dprintk("lockd: host %s (%s) rebooted, cnt %d\n", | |
414 | cached->sm_name, cached->sm_addrbuf, | |
415 | atomic_read(&cached->sm_count)); | |
416 | return cached; | |
417 | } | |
418 | ||
67c6d107 CL |
419 | /** |
420 | * nsm_release - Release an NSM handle | |
421 | * @nsm: pointer to handle to be released | |
422 | * | |
423 | */ | |
424 | void nsm_release(struct nsm_handle *nsm) | |
425 | { | |
67c6d107 CL |
426 | if (atomic_dec_and_lock(&nsm->sm_count, &nsm_lock)) { |
427 | list_del(&nsm->sm_link); | |
428 | spin_unlock(&nsm_lock); | |
5cf1c4b1 CL |
429 | dprintk("lockd: destroyed nsm_handle for %s (%s)\n", |
430 | nsm->sm_name, nsm->sm_addrbuf); | |
67c6d107 CL |
431 | kfree(nsm); |
432 | } | |
433 | } | |
434 | ||
1da177e4 LT |
435 | /* |
436 | * XDR functions for NSM. | |
2ca7754d CL |
437 | * |
438 | * See http://www.opengroup.org/ for details on the Network | |
439 | * Status Monitor wire protocol. | |
1da177e4 LT |
440 | */ |
441 | ||
03eb1dcb | 442 | static int encode_nsm_string(struct xdr_stream *xdr, const char *string) |
099bd05f | 443 | { |
03eb1dcb CL |
444 | const u32 len = strlen(string); |
445 | __be32 *p; | |
446 | ||
447 | if (unlikely(len > SM_MAXSTRLEN)) | |
448 | return -EIO; | |
449 | p = xdr_reserve_space(xdr, sizeof(u32) + len); | |
450 | if (unlikely(p == NULL)) | |
451 | return -EIO; | |
452 | xdr_encode_opaque(p, string, len); | |
453 | return 0; | |
099bd05f CL |
454 | } |
455 | ||
49695174 CL |
456 | /* |
457 | * "mon_name" specifies the host to be monitored. | |
49695174 | 458 | */ |
03eb1dcb | 459 | static int encode_mon_name(struct xdr_stream *xdr, const struct nsm_args *argp) |
49695174 | 460 | { |
03eb1dcb | 461 | return encode_nsm_string(xdr, argp->mon_name); |
49695174 CL |
462 | } |
463 | ||
850c95fd CL |
464 | /* |
465 | * The "my_id" argument specifies the hostname and RPC procedure | |
466 | * to be called when the status manager receives notification | |
36e8e668 | 467 | * (via the NLMPROC_SM_NOTIFY call) that the state of host "mon_name" |
850c95fd CL |
468 | * has changed. |
469 | */ | |
03eb1dcb | 470 | static int encode_my_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
850c95fd | 471 | { |
03eb1dcb CL |
472 | int status; |
473 | __be32 *p; | |
474 | ||
475 | status = encode_nsm_string(xdr, utsname()->nodename); | |
476 | if (unlikely(status != 0)) | |
477 | return status; | |
478 | p = xdr_reserve_space(xdr, 3 * sizeof(u32)); | |
479 | if (unlikely(p == NULL)) | |
480 | return -EIO; | |
850c95fd CL |
481 | *p++ = htonl(argp->prog); |
482 | *p++ = htonl(argp->vers); | |
483 | *p++ = htonl(argp->proc); | |
03eb1dcb | 484 | return 0; |
850c95fd CL |
485 | } |
486 | ||
ea72a7f1 CL |
487 | /* |
488 | * The "mon_id" argument specifies the non-private arguments | |
36e8e668 | 489 | * of an NSMPROC_MON or NSMPROC_UNMON call. |
ea72a7f1 | 490 | */ |
03eb1dcb | 491 | static int encode_mon_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
ea72a7f1 | 492 | { |
03eb1dcb | 493 | int status; |
ea72a7f1 | 494 | |
03eb1dcb CL |
495 | status = encode_mon_name(xdr, argp); |
496 | if (unlikely(status != 0)) | |
497 | return status; | |
498 | return encode_my_id(xdr, argp); | |
ea72a7f1 CL |
499 | } |
500 | ||
0490a54a CL |
501 | /* |
502 | * The "priv" argument may contain private information required | |
36e8e668 CL |
503 | * by the NSMPROC_MON call. This information will be supplied in the |
504 | * NLMPROC_SM_NOTIFY call. | |
0490a54a | 505 | */ |
03eb1dcb | 506 | static int encode_priv(struct xdr_stream *xdr, const struct nsm_args *argp) |
0490a54a | 507 | { |
03eb1dcb CL |
508 | __be32 *p; |
509 | ||
510 | p = xdr_reserve_space(xdr, SM_PRIV_SIZE); | |
511 | if (unlikely(p == NULL)) | |
512 | return -EIO; | |
cab2d3c9 | 513 | xdr_encode_opaque_fixed(p, argp->priv->data, SM_PRIV_SIZE); |
03eb1dcb | 514 | return 0; |
0490a54a CL |
515 | } |
516 | ||
03eb1dcb CL |
517 | static int xdr_enc_mon(struct rpc_rqst *req, __be32 *p, |
518 | const struct nsm_args *argp) | |
1da177e4 | 519 | { |
03eb1dcb CL |
520 | struct xdr_stream xdr; |
521 | int status; | |
0490a54a | 522 | |
03eb1dcb CL |
523 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
524 | status = encode_mon_id(&xdr, argp); | |
525 | if (unlikely(status)) | |
526 | return status; | |
527 | return encode_priv(&xdr, argp); | |
1da177e4 LT |
528 | } |
529 | ||
03eb1dcb CL |
530 | static int xdr_enc_unmon(struct rpc_rqst *req, __be32 *p, |
531 | const struct nsm_args *argp) | |
1da177e4 | 532 | { |
03eb1dcb CL |
533 | struct xdr_stream xdr; |
534 | ||
535 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
536 | return encode_mon_id(&xdr, argp); | |
1da177e4 LT |
537 | } |
538 | ||
03eb1dcb CL |
539 | static int xdr_dec_stat_res(struct rpc_rqst *rqstp, __be32 *p, |
540 | struct nsm_res *resp) | |
1da177e4 | 541 | { |
03eb1dcb CL |
542 | struct xdr_stream xdr; |
543 | ||
544 | xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); | |
545 | p = xdr_inline_decode(&xdr, 2 * sizeof(u32)); | |
546 | if (unlikely(p == NULL)) | |
547 | return -EIO; | |
1da177e4 | 548 | resp->status = ntohl(*p++); |
03eb1dcb CL |
549 | resp->state = ntohl(*p); |
550 | ||
551 | dprintk("lockd: xdr_dec_stat_res status %d state %d\n", | |
1da177e4 LT |
552 | resp->status, resp->state); |
553 | return 0; | |
554 | } | |
555 | ||
03eb1dcb CL |
556 | static int xdr_dec_stat(struct rpc_rqst *rqstp, __be32 *p, |
557 | struct nsm_res *resp) | |
1da177e4 | 558 | { |
03eb1dcb CL |
559 | struct xdr_stream xdr; |
560 | ||
561 | xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); | |
562 | p = xdr_inline_decode(&xdr, sizeof(u32)); | |
563 | if (unlikely(p == NULL)) | |
564 | return -EIO; | |
565 | resp->state = ntohl(*p); | |
566 | ||
567 | dprintk("lockd: xdr_dec_stat state %d\n", resp->state); | |
1da177e4 LT |
568 | return 0; |
569 | } | |
570 | ||
571 | #define SM_my_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN)) | |
2ca7754d CL |
572 | #define SM_my_id_sz (SM_my_name_sz+3) |
573 | #define SM_mon_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN)) | |
574 | #define SM_mon_id_sz (SM_mon_name_sz+SM_my_id_sz) | |
0490a54a CL |
575 | #define SM_priv_sz (XDR_QUADLEN(SM_PRIV_SIZE)) |
576 | #define SM_mon_sz (SM_mon_id_sz+SM_priv_sz) | |
1da177e4 LT |
577 | #define SM_monres_sz 2 |
578 | #define SM_unmonres_sz 1 | |
579 | ||
1da177e4 | 580 | static struct rpc_procinfo nsm_procedures[] = { |
36e8e668 CL |
581 | [NSMPROC_MON] = { |
582 | .p_proc = NSMPROC_MON, | |
03eb1dcb CL |
583 | .p_encode = (kxdrproc_t)xdr_enc_mon, |
584 | .p_decode = (kxdrproc_t)xdr_dec_stat_res, | |
2bea90d4 CL |
585 | .p_arglen = SM_mon_sz, |
586 | .p_replen = SM_monres_sz, | |
36e8e668 | 587 | .p_statidx = NSMPROC_MON, |
cc0175c1 | 588 | .p_name = "MONITOR", |
1da177e4 | 589 | }, |
36e8e668 CL |
590 | [NSMPROC_UNMON] = { |
591 | .p_proc = NSMPROC_UNMON, | |
03eb1dcb CL |
592 | .p_encode = (kxdrproc_t)xdr_enc_unmon, |
593 | .p_decode = (kxdrproc_t)xdr_dec_stat, | |
2bea90d4 CL |
594 | .p_arglen = SM_mon_id_sz, |
595 | .p_replen = SM_unmonres_sz, | |
36e8e668 | 596 | .p_statidx = NSMPROC_UNMON, |
cc0175c1 | 597 | .p_name = "UNMONITOR", |
1da177e4 LT |
598 | }, |
599 | }; | |
600 | ||
601 | static struct rpc_version nsm_version1 = { | |
e8c96f8c TK |
602 | .number = 1, |
603 | .nrprocs = ARRAY_SIZE(nsm_procedures), | |
1da177e4 LT |
604 | .procs = nsm_procedures |
605 | }; | |
606 | ||
607 | static struct rpc_version * nsm_version[] = { | |
608 | [1] = &nsm_version1, | |
609 | }; | |
610 | ||
611 | static struct rpc_stat nsm_stats; | |
612 | ||
613 | static struct rpc_program nsm_program = { | |
614 | .name = "statd", | |
36e8e668 | 615 | .number = NSM_PROGRAM, |
e8c96f8c | 616 | .nrvers = ARRAY_SIZE(nsm_version), |
1da177e4 LT |
617 | .version = nsm_version, |
618 | .stats = &nsm_stats | |
619 | }; |