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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 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 | */ | |
b7ba597f CL |
56 | int __read_mostly nsm_local_state; |
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, | |
115 | }; | |
116 | ||
117 | return rpc_create(&args); | |
118 | } | |
119 | ||
120 | static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res) | |
1da177e4 LT |
121 | { |
122 | struct rpc_clnt *clnt; | |
123 | int status; | |
a4846750 | 124 | struct nsm_args args = { |
cab2d3c9 | 125 | .priv = &nsm->sm_priv, |
a4846750 CL |
126 | .prog = NLM_PROGRAM, |
127 | .vers = 3, | |
128 | .proc = NLMPROC_NSM_NOTIFY, | |
29ed1407 | 129 | .mon_name = nsm->sm_mon_name, |
a4846750 | 130 | }; |
dead28da CL |
131 | struct rpc_message msg = { |
132 | .rpc_argp = &args, | |
133 | .rpc_resp = res, | |
134 | }; | |
1da177e4 LT |
135 | |
136 | clnt = nsm_create(); | |
137 | if (IS_ERR(clnt)) { | |
138 | status = PTR_ERR(clnt); | |
5acf4315 CL |
139 | dprintk("lockd: failed to create NSM upcall transport, " |
140 | "status=%d\n", status); | |
1da177e4 LT |
141 | goto out; |
142 | } | |
143 | ||
1da177e4 LT |
144 | memset(res, 0, sizeof(*res)); |
145 | ||
dead28da CL |
146 | msg.rpc_proc = &clnt->cl_procinfo[proc]; |
147 | status = rpc_call_sync(clnt, &msg, 0); | |
1da177e4 | 148 | if (status < 0) |
5acf4315 CL |
149 | dprintk("lockd: NSM upcall RPC failed, status=%d\n", |
150 | status); | |
1da177e4 LT |
151 | else |
152 | status = 0; | |
90c5755f | 153 | rpc_shutdown_client(clnt); |
1da177e4 LT |
154 | out: |
155 | return status; | |
156 | } | |
157 | ||
1e49323c CL |
158 | /** |
159 | * nsm_monitor - Notify a peer in case we reboot | |
160 | * @host: pointer to nlm_host of peer to notify | |
161 | * | |
162 | * If this peer is not already monitored, this function sends an | |
163 | * upcall to the local rpc.statd to record the name/address of | |
164 | * the peer to notify in case we reboot. | |
165 | * | |
166 | * Returns zero if the peer is monitored by the local rpc.statd; | |
167 | * otherwise a negative errno value is returned. | |
1da177e4 | 168 | */ |
1e49323c | 169 | int nsm_monitor(const struct nlm_host *host) |
1da177e4 | 170 | { |
8dead0db | 171 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 LT |
172 | struct nsm_res res; |
173 | int status; | |
174 | ||
9fee4902 | 175 | dprintk("lockd: nsm_monitor(%s)\n", nsm->sm_name); |
8dead0db OK |
176 | |
177 | if (nsm->sm_monitored) | |
977faf39 | 178 | return 0; |
1da177e4 | 179 | |
29ed1407 CL |
180 | /* |
181 | * Choose whether to record the caller_name or IP address of | |
182 | * this peer in the local rpc.statd's database. | |
183 | */ | |
184 | nsm->sm_mon_name = nsm_use_hostnames ? nsm->sm_name : nsm->sm_addrbuf; | |
185 | ||
36e8e668 | 186 | status = nsm_mon_unmon(nsm, NSMPROC_MON, &res); |
5d254b11 CL |
187 | if (res.status != 0) |
188 | status = -EIO; | |
189 | if (status < 0) | |
9fee4902 | 190 | printk(KERN_NOTICE "lockd: cannot monitor %s\n", nsm->sm_name); |
1da177e4 | 191 | else |
8dead0db | 192 | nsm->sm_monitored = 1; |
1da177e4 LT |
193 | return status; |
194 | } | |
195 | ||
356c3eb4 CL |
196 | /** |
197 | * nsm_unmonitor - Unregister peer notification | |
198 | * @host: pointer to nlm_host of peer to stop monitoring | |
199 | * | |
200 | * If this peer is monitored, this function sends an upcall to | |
201 | * tell the local rpc.statd not to send this peer a notification | |
202 | * when we reboot. | |
1da177e4 | 203 | */ |
356c3eb4 | 204 | void nsm_unmonitor(const struct nlm_host *host) |
1da177e4 | 205 | { |
8dead0db | 206 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 | 207 | struct nsm_res res; |
356c3eb4 | 208 | int status; |
1da177e4 | 209 | |
9502c522 OK |
210 | if (atomic_read(&nsm->sm_count) == 1 |
211 | && nsm->sm_monitored && !nsm->sm_sticky) { | |
9fee4902 | 212 | dprintk("lockd: nsm_unmonitor(%s)\n", nsm->sm_name); |
9502c522 | 213 | |
36e8e668 | 214 | status = nsm_mon_unmon(nsm, NSMPROC_UNMON, &res); |
0c7aef45 CL |
215 | if (res.status != 0) |
216 | status = -EIO; | |
977faf39 | 217 | if (status < 0) |
9502c522 | 218 | printk(KERN_NOTICE "lockd: cannot unmonitor %s\n", |
9fee4902 | 219 | nsm->sm_name); |
9502c522 OK |
220 | else |
221 | nsm->sm_monitored = 0; | |
977faf39 | 222 | } |
1da177e4 LT |
223 | } |
224 | ||
3420a8c4 CL |
225 | static struct nsm_handle *nsm_lookup_hostname(const char *hostname, |
226 | const size_t len) | |
227 | { | |
228 | struct nsm_handle *nsm; | |
229 | ||
230 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
231 | if (strlen(nsm->sm_name) == len && | |
232 | memcmp(nsm->sm_name, hostname, len) == 0) | |
233 | return nsm; | |
234 | return NULL; | |
235 | } | |
236 | ||
77a3ef33 CL |
237 | static struct nsm_handle *nsm_lookup_addr(const struct sockaddr *sap) |
238 | { | |
239 | struct nsm_handle *nsm; | |
240 | ||
241 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
242 | if (nlm_cmp_addr(nsm_addr(nsm), sap)) | |
243 | return nsm; | |
244 | return NULL; | |
245 | } | |
246 | ||
3420a8c4 CL |
247 | static struct nsm_handle *nsm_lookup_priv(const struct nsm_private *priv) |
248 | { | |
249 | struct nsm_handle *nsm; | |
250 | ||
251 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
252 | if (memcmp(nsm->sm_priv.data, priv->data, | |
253 | sizeof(priv->data)) == 0) | |
254 | return nsm; | |
255 | return NULL; | |
256 | } | |
257 | ||
7e44d3be CL |
258 | /* |
259 | * Construct a unique cookie to match this nsm_handle to this monitored | |
260 | * host. It is passed to the local rpc.statd via NSMPROC_MON, and | |
261 | * returned via NLMPROC_SM_NOTIFY, in the "priv" field of these | |
262 | * requests. | |
263 | * | |
94da7663 CL |
264 | * The NSM protocol requires that these cookies be unique while the |
265 | * system is running. We prefer a stronger requirement of making them | |
266 | * unique across reboots. If user space bugs cause a stale cookie to | |
267 | * be sent to the kernel, it could cause the wrong host to lose its | |
268 | * lock state if cookies were not unique across reboots. | |
269 | * | |
270 | * The cookies are exposed only to local user space via loopback. They | |
271 | * do not appear on the physical network. If we want greater security | |
272 | * for some reason, nsm_init_private() could perform a one-way hash to | |
273 | * obscure the contents of the cookie. | |
7e44d3be CL |
274 | */ |
275 | static void nsm_init_private(struct nsm_handle *nsm) | |
276 | { | |
94da7663 CL |
277 | u64 *p = (u64 *)&nsm->sm_priv.data; |
278 | struct timespec ts; | |
ad5b365c | 279 | s64 ns; |
94da7663 CL |
280 | |
281 | ktime_get_ts(&ts); | |
ad5b365c MR |
282 | ns = timespec_to_ns(&ts); |
283 | put_unaligned(ns, p); | |
284 | put_unaligned((unsigned long)nsm, p + 1); | |
7e44d3be CL |
285 | } |
286 | ||
b39b897c CL |
287 | static struct nsm_handle *nsm_create_handle(const struct sockaddr *sap, |
288 | const size_t salen, | |
289 | const char *hostname, | |
290 | const size_t hostname_len) | |
291 | { | |
292 | struct nsm_handle *new; | |
293 | ||
294 | new = kzalloc(sizeof(*new) + hostname_len + 1, GFP_KERNEL); | |
295 | if (unlikely(new == NULL)) | |
296 | return NULL; | |
297 | ||
298 | atomic_set(&new->sm_count, 1); | |
299 | new->sm_name = (char *)(new + 1); | |
300 | memcpy(nsm_addr(new), sap, salen); | |
301 | new->sm_addrlen = salen; | |
302 | nsm_init_private(new); | |
303 | nsm_display_address((const struct sockaddr *)&new->sm_addr, | |
304 | new->sm_addrbuf, sizeof(new->sm_addrbuf)); | |
305 | memcpy(new->sm_name, hostname, hostname_len); | |
306 | new->sm_name[hostname_len] = '\0'; | |
307 | ||
308 | return new; | |
309 | } | |
310 | ||
67c6d107 | 311 | /** |
92fd91b9 | 312 | * nsm_get_handle - Find or create a cached nsm_handle |
67c6d107 CL |
313 | * @sap: pointer to socket address of handle to find |
314 | * @salen: length of socket address | |
315 | * @hostname: pointer to C string containing hostname to find | |
316 | * @hostname_len: length of C string | |
67c6d107 | 317 | * |
92fd91b9 | 318 | * Behavior is modulated by the global nsm_use_hostnames variable. |
67c6d107 | 319 | * |
92fd91b9 CL |
320 | * Returns a cached nsm_handle after bumping its ref count, or |
321 | * returns a fresh nsm_handle if a handle that matches @sap and/or | |
322 | * @hostname cannot be found in the handle cache. Returns NULL if | |
323 | * an error occurs. | |
67c6d107 | 324 | */ |
92fd91b9 CL |
325 | struct nsm_handle *nsm_get_handle(const struct sockaddr *sap, |
326 | const size_t salen, const char *hostname, | |
327 | const size_t hostname_len) | |
67c6d107 | 328 | { |
77a3ef33 | 329 | struct nsm_handle *cached, *new = NULL; |
67c6d107 | 330 | |
67c6d107 CL |
331 | if (hostname && memchr(hostname, '/', hostname_len) != NULL) { |
332 | if (printk_ratelimit()) { | |
333 | printk(KERN_WARNING "Invalid hostname \"%.*s\" " | |
334 | "in NFS lock request\n", | |
335 | (int)hostname_len, hostname); | |
336 | } | |
337 | return NULL; | |
338 | } | |
339 | ||
340 | retry: | |
341 | spin_lock(&nsm_lock); | |
77a3ef33 CL |
342 | |
343 | if (nsm_use_hostnames && hostname != NULL) | |
344 | cached = nsm_lookup_hostname(hostname, hostname_len); | |
345 | else | |
346 | cached = nsm_lookup_addr(sap); | |
347 | ||
348 | if (cached != NULL) { | |
349 | atomic_inc(&cached->sm_count); | |
350 | spin_unlock(&nsm_lock); | |
351 | kfree(new); | |
352 | dprintk("lockd: found nsm_handle for %s (%s), " | |
353 | "cnt %d\n", cached->sm_name, | |
354 | cached->sm_addrbuf, | |
355 | atomic_read(&cached->sm_count)); | |
356 | return cached; | |
67c6d107 | 357 | } |
77a3ef33 CL |
358 | |
359 | if (new != NULL) { | |
360 | list_add(&new->sm_link, &nsm_handles); | |
361 | spin_unlock(&nsm_lock); | |
5cf1c4b1 | 362 | dprintk("lockd: created nsm_handle for %s (%s)\n", |
77a3ef33 CL |
363 | new->sm_name, new->sm_addrbuf); |
364 | return new; | |
67c6d107 | 365 | } |
77a3ef33 | 366 | |
67c6d107 CL |
367 | spin_unlock(&nsm_lock); |
368 | ||
77a3ef33 CL |
369 | new = nsm_create_handle(sap, salen, hostname, hostname_len); |
370 | if (unlikely(new == NULL)) | |
67c6d107 | 371 | return NULL; |
67c6d107 | 372 | goto retry; |
67c6d107 CL |
373 | } |
374 | ||
3420a8c4 CL |
375 | /** |
376 | * nsm_reboot_lookup - match NLMPROC_SM_NOTIFY arguments to an nsm_handle | |
377 | * @info: pointer to NLMPROC_SM_NOTIFY arguments | |
378 | * | |
379 | * Returns a matching nsm_handle if found in the nsm cache; the returned | |
380 | * nsm_handle's reference count is bumped and sm_monitored is cleared. | |
381 | * Otherwise returns NULL if some error occurred. | |
382 | */ | |
383 | struct nsm_handle *nsm_reboot_lookup(const struct nlm_reboot *info) | |
384 | { | |
385 | struct nsm_handle *cached; | |
386 | ||
387 | spin_lock(&nsm_lock); | |
388 | ||
94da7663 | 389 | cached = nsm_lookup_priv(&info->priv); |
3420a8c4 CL |
390 | if (unlikely(cached == NULL)) { |
391 | spin_unlock(&nsm_lock); | |
392 | dprintk("lockd: never saw rebooted peer '%.*s' before\n", | |
393 | info->len, info->mon); | |
394 | return cached; | |
395 | } | |
396 | ||
397 | atomic_inc(&cached->sm_count); | |
398 | spin_unlock(&nsm_lock); | |
399 | ||
400 | /* | |
401 | * During subsequent lock activity, force a fresh | |
402 | * notification to be set up for this host. | |
403 | */ | |
404 | cached->sm_monitored = 0; | |
405 | ||
406 | dprintk("lockd: host %s (%s) rebooted, cnt %d\n", | |
407 | cached->sm_name, cached->sm_addrbuf, | |
408 | atomic_read(&cached->sm_count)); | |
409 | return cached; | |
410 | } | |
411 | ||
67c6d107 CL |
412 | /** |
413 | * nsm_release - Release an NSM handle | |
414 | * @nsm: pointer to handle to be released | |
415 | * | |
416 | */ | |
417 | void nsm_release(struct nsm_handle *nsm) | |
418 | { | |
67c6d107 CL |
419 | if (atomic_dec_and_lock(&nsm->sm_count, &nsm_lock)) { |
420 | list_del(&nsm->sm_link); | |
421 | spin_unlock(&nsm_lock); | |
5cf1c4b1 CL |
422 | dprintk("lockd: destroyed nsm_handle for %s (%s)\n", |
423 | nsm->sm_name, nsm->sm_addrbuf); | |
67c6d107 CL |
424 | kfree(nsm); |
425 | } | |
426 | } | |
427 | ||
1da177e4 LT |
428 | /* |
429 | * XDR functions for NSM. | |
2ca7754d CL |
430 | * |
431 | * See http://www.opengroup.org/ for details on the Network | |
432 | * Status Monitor wire protocol. | |
1da177e4 LT |
433 | */ |
434 | ||
03eb1dcb | 435 | static int encode_nsm_string(struct xdr_stream *xdr, const char *string) |
099bd05f | 436 | { |
03eb1dcb CL |
437 | const u32 len = strlen(string); |
438 | __be32 *p; | |
439 | ||
440 | if (unlikely(len > SM_MAXSTRLEN)) | |
441 | return -EIO; | |
442 | p = xdr_reserve_space(xdr, sizeof(u32) + len); | |
443 | if (unlikely(p == NULL)) | |
444 | return -EIO; | |
445 | xdr_encode_opaque(p, string, len); | |
446 | return 0; | |
099bd05f CL |
447 | } |
448 | ||
49695174 CL |
449 | /* |
450 | * "mon_name" specifies the host to be monitored. | |
49695174 | 451 | */ |
03eb1dcb | 452 | static int encode_mon_name(struct xdr_stream *xdr, const struct nsm_args *argp) |
49695174 | 453 | { |
03eb1dcb | 454 | return encode_nsm_string(xdr, argp->mon_name); |
49695174 CL |
455 | } |
456 | ||
850c95fd CL |
457 | /* |
458 | * The "my_id" argument specifies the hostname and RPC procedure | |
459 | * to be called when the status manager receives notification | |
36e8e668 | 460 | * (via the NLMPROC_SM_NOTIFY call) that the state of host "mon_name" |
850c95fd CL |
461 | * has changed. |
462 | */ | |
03eb1dcb | 463 | static int encode_my_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
850c95fd | 464 | { |
03eb1dcb CL |
465 | int status; |
466 | __be32 *p; | |
467 | ||
468 | status = encode_nsm_string(xdr, utsname()->nodename); | |
469 | if (unlikely(status != 0)) | |
470 | return status; | |
471 | p = xdr_reserve_space(xdr, 3 * sizeof(u32)); | |
472 | if (unlikely(p == NULL)) | |
473 | return -EIO; | |
850c95fd CL |
474 | *p++ = htonl(argp->prog); |
475 | *p++ = htonl(argp->vers); | |
476 | *p++ = htonl(argp->proc); | |
03eb1dcb | 477 | return 0; |
850c95fd CL |
478 | } |
479 | ||
ea72a7f1 CL |
480 | /* |
481 | * The "mon_id" argument specifies the non-private arguments | |
36e8e668 | 482 | * of an NSMPROC_MON or NSMPROC_UNMON call. |
ea72a7f1 | 483 | */ |
03eb1dcb | 484 | static int encode_mon_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
ea72a7f1 | 485 | { |
03eb1dcb | 486 | int status; |
ea72a7f1 | 487 | |
03eb1dcb CL |
488 | status = encode_mon_name(xdr, argp); |
489 | if (unlikely(status != 0)) | |
490 | return status; | |
491 | return encode_my_id(xdr, argp); | |
ea72a7f1 CL |
492 | } |
493 | ||
0490a54a CL |
494 | /* |
495 | * The "priv" argument may contain private information required | |
36e8e668 CL |
496 | * by the NSMPROC_MON call. This information will be supplied in the |
497 | * NLMPROC_SM_NOTIFY call. | |
0490a54a | 498 | */ |
03eb1dcb | 499 | static int encode_priv(struct xdr_stream *xdr, const struct nsm_args *argp) |
0490a54a | 500 | { |
03eb1dcb CL |
501 | __be32 *p; |
502 | ||
503 | p = xdr_reserve_space(xdr, SM_PRIV_SIZE); | |
504 | if (unlikely(p == NULL)) | |
505 | return -EIO; | |
cab2d3c9 | 506 | xdr_encode_opaque_fixed(p, argp->priv->data, SM_PRIV_SIZE); |
03eb1dcb | 507 | return 0; |
0490a54a CL |
508 | } |
509 | ||
03eb1dcb CL |
510 | static int xdr_enc_mon(struct rpc_rqst *req, __be32 *p, |
511 | const struct nsm_args *argp) | |
1da177e4 | 512 | { |
03eb1dcb CL |
513 | struct xdr_stream xdr; |
514 | int status; | |
0490a54a | 515 | |
03eb1dcb CL |
516 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
517 | status = encode_mon_id(&xdr, argp); | |
518 | if (unlikely(status)) | |
519 | return status; | |
520 | return encode_priv(&xdr, argp); | |
1da177e4 LT |
521 | } |
522 | ||
03eb1dcb CL |
523 | static int xdr_enc_unmon(struct rpc_rqst *req, __be32 *p, |
524 | const struct nsm_args *argp) | |
1da177e4 | 525 | { |
03eb1dcb CL |
526 | struct xdr_stream xdr; |
527 | ||
528 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
529 | return encode_mon_id(&xdr, argp); | |
1da177e4 LT |
530 | } |
531 | ||
03eb1dcb CL |
532 | static int xdr_dec_stat_res(struct rpc_rqst *rqstp, __be32 *p, |
533 | struct nsm_res *resp) | |
1da177e4 | 534 | { |
03eb1dcb CL |
535 | struct xdr_stream xdr; |
536 | ||
537 | xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); | |
538 | p = xdr_inline_decode(&xdr, 2 * sizeof(u32)); | |
539 | if (unlikely(p == NULL)) | |
540 | return -EIO; | |
1da177e4 | 541 | resp->status = ntohl(*p++); |
03eb1dcb CL |
542 | resp->state = ntohl(*p); |
543 | ||
544 | dprintk("lockd: xdr_dec_stat_res status %d state %d\n", | |
1da177e4 LT |
545 | resp->status, resp->state); |
546 | return 0; | |
547 | } | |
548 | ||
03eb1dcb CL |
549 | static int xdr_dec_stat(struct rpc_rqst *rqstp, __be32 *p, |
550 | struct nsm_res *resp) | |
1da177e4 | 551 | { |
03eb1dcb CL |
552 | struct xdr_stream xdr; |
553 | ||
554 | xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); | |
555 | p = xdr_inline_decode(&xdr, sizeof(u32)); | |
556 | if (unlikely(p == NULL)) | |
557 | return -EIO; | |
558 | resp->state = ntohl(*p); | |
559 | ||
560 | dprintk("lockd: xdr_dec_stat state %d\n", resp->state); | |
1da177e4 LT |
561 | return 0; |
562 | } | |
563 | ||
564 | #define SM_my_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN)) | |
2ca7754d CL |
565 | #define SM_my_id_sz (SM_my_name_sz+3) |
566 | #define SM_mon_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN)) | |
567 | #define SM_mon_id_sz (SM_mon_name_sz+SM_my_id_sz) | |
0490a54a CL |
568 | #define SM_priv_sz (XDR_QUADLEN(SM_PRIV_SIZE)) |
569 | #define SM_mon_sz (SM_mon_id_sz+SM_priv_sz) | |
1da177e4 LT |
570 | #define SM_monres_sz 2 |
571 | #define SM_unmonres_sz 1 | |
572 | ||
1da177e4 | 573 | static struct rpc_procinfo nsm_procedures[] = { |
36e8e668 CL |
574 | [NSMPROC_MON] = { |
575 | .p_proc = NSMPROC_MON, | |
03eb1dcb CL |
576 | .p_encode = (kxdrproc_t)xdr_enc_mon, |
577 | .p_decode = (kxdrproc_t)xdr_dec_stat_res, | |
2bea90d4 CL |
578 | .p_arglen = SM_mon_sz, |
579 | .p_replen = SM_monres_sz, | |
36e8e668 | 580 | .p_statidx = NSMPROC_MON, |
cc0175c1 | 581 | .p_name = "MONITOR", |
1da177e4 | 582 | }, |
36e8e668 CL |
583 | [NSMPROC_UNMON] = { |
584 | .p_proc = NSMPROC_UNMON, | |
03eb1dcb CL |
585 | .p_encode = (kxdrproc_t)xdr_enc_unmon, |
586 | .p_decode = (kxdrproc_t)xdr_dec_stat, | |
2bea90d4 CL |
587 | .p_arglen = SM_mon_id_sz, |
588 | .p_replen = SM_unmonres_sz, | |
36e8e668 | 589 | .p_statidx = NSMPROC_UNMON, |
cc0175c1 | 590 | .p_name = "UNMONITOR", |
1da177e4 LT |
591 | }, |
592 | }; | |
593 | ||
594 | static struct rpc_version nsm_version1 = { | |
e8c96f8c TK |
595 | .number = 1, |
596 | .nrprocs = ARRAY_SIZE(nsm_procedures), | |
1da177e4 LT |
597 | .procs = nsm_procedures |
598 | }; | |
599 | ||
600 | static struct rpc_version * nsm_version[] = { | |
601 | [1] = &nsm_version1, | |
602 | }; | |
603 | ||
604 | static struct rpc_stat nsm_stats; | |
605 | ||
606 | static struct rpc_program nsm_program = { | |
607 | .name = "statd", | |
36e8e668 | 608 | .number = NSM_PROGRAM, |
e8c96f8c | 609 | .nrvers = ARRAY_SIZE(nsm_version), |
1da177e4 LT |
610 | .version = nsm_version, |
611 | .stats = &nsm_stats | |
612 | }; |