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> | |
1da177e4 | 10 | #include <linux/kernel.h> |
94da7663 | 11 | #include <linux/ktime.h> |
5a0e3ad6 | 12 | #include <linux/slab.h> |
94da7663 | 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 | ||
e9406db2 SK |
21 | #include "netns.h" |
22 | ||
1da177e4 | 23 | #define NLMDBG_FACILITY NLMDBG_MONITOR |
36e8e668 CL |
24 | #define NSM_PROGRAM 100024 |
25 | #define NSM_VERSION 1 | |
26 | ||
27 | enum { | |
28 | NSMPROC_NULL, | |
29 | NSMPROC_STAT, | |
30 | NSMPROC_MON, | |
31 | NSMPROC_UNMON, | |
32 | NSMPROC_UNMON_ALL, | |
33 | NSMPROC_SIMU_CRASH, | |
34 | NSMPROC_NOTIFY, | |
35 | }; | |
1da177e4 | 36 | |
9c1bfd03 | 37 | struct nsm_args { |
cab2d3c9 | 38 | struct nsm_private *priv; |
9c1bfd03 CL |
39 | u32 prog; /* RPC callback info */ |
40 | u32 vers; | |
41 | u32 proc; | |
42 | ||
43 | char *mon_name; | |
303a7ce9 | 44 | char *nodename; |
9c1bfd03 CL |
45 | }; |
46 | ||
47 | struct nsm_res { | |
48 | u32 status; | |
49 | u32 state; | |
50 | }; | |
51 | ||
a613fa16 | 52 | static const struct rpc_program nsm_program; |
67c6d107 CL |
53 | static LIST_HEAD(nsm_handles); |
54 | static DEFINE_SPINLOCK(nsm_lock); | |
1da177e4 LT |
55 | |
56 | /* | |
57 | * Local NSM state | |
58 | */ | |
6c9dc425 | 59 | u32 __read_mostly nsm_local_state; |
90ab5ee9 | 60 | bool __read_mostly nsm_use_hostnames; |
1da177e4 | 61 | |
8529bc51 CL |
62 | static inline struct sockaddr *nsm_addr(const struct nsm_handle *nsm) |
63 | { | |
64 | return (struct sockaddr *)&nsm->sm_addr; | |
65 | } | |
66 | ||
0e1cb5c0 | 67 | static struct rpc_clnt *nsm_create(struct net *net) |
49b5699b CL |
68 | { |
69 | struct sockaddr_in sin = { | |
70 | .sin_family = AF_INET, | |
71 | .sin_addr.s_addr = htonl(INADDR_LOOPBACK), | |
72 | }; | |
73 | struct rpc_create_args args = { | |
0e1cb5c0 | 74 | .net = net, |
e9406db2 | 75 | .protocol = XPRT_TRANSPORT_TCP, |
49b5699b CL |
76 | .address = (struct sockaddr *)&sin, |
77 | .addrsize = sizeof(sin), | |
78 | .servername = "rpc.statd", | |
79 | .program = &nsm_program, | |
80 | .version = NSM_VERSION, | |
81 | .authflavor = RPC_AUTH_NULL, | |
0e5c2632 | 82 | .flags = RPC_CLNT_CREATE_NOPING, |
49b5699b CL |
83 | }; |
84 | ||
85 | return rpc_create(&args); | |
86 | } | |
87 | ||
a4ee8d97 TM |
88 | static struct rpc_clnt *nsm_client_set(struct lockd_net *ln, |
89 | struct rpc_clnt *clnt) | |
90 | { | |
91 | spin_lock(&ln->nsm_clnt_lock); | |
92 | if (ln->nsm_users == 0) { | |
93 | if (clnt == NULL) | |
94 | goto out; | |
95 | ln->nsm_clnt = clnt; | |
96 | } | |
97 | clnt = ln->nsm_clnt; | |
98 | ln->nsm_users++; | |
99 | out: | |
100 | spin_unlock(&ln->nsm_clnt_lock); | |
101 | return clnt; | |
102 | } | |
103 | ||
cb7323ff | 104 | static struct rpc_clnt *nsm_client_get(struct net *net) |
e9406db2 | 105 | { |
a4ee8d97 | 106 | struct rpc_clnt *clnt, *new; |
e9406db2 SK |
107 | struct lockd_net *ln = net_generic(net, lockd_net_id); |
108 | ||
a4ee8d97 TM |
109 | clnt = nsm_client_set(ln, NULL); |
110 | if (clnt != NULL) | |
e9406db2 | 111 | goto out; |
e9406db2 | 112 | |
a4ee8d97 TM |
113 | clnt = new = nsm_create(net); |
114 | if (IS_ERR(clnt)) | |
115 | goto out; | |
116 | ||
117 | clnt = nsm_client_set(ln, new); | |
118 | if (clnt != new) | |
119 | rpc_shutdown_client(new); | |
e9406db2 SK |
120 | out: |
121 | return clnt; | |
122 | } | |
123 | ||
cb7323ff | 124 | static void nsm_client_put(struct net *net) |
e9406db2 SK |
125 | { |
126 | struct lockd_net *ln = net_generic(net, lockd_net_id); | |
e498daa8 | 127 | struct rpc_clnt *clnt = NULL; |
e9406db2 SK |
128 | |
129 | spin_lock(&ln->nsm_clnt_lock); | |
e498daa8 TM |
130 | ln->nsm_users--; |
131 | if (ln->nsm_users == 0) { | |
132 | clnt = ln->nsm_clnt; | |
133 | ln->nsm_clnt = NULL; | |
e9406db2 SK |
134 | } |
135 | spin_unlock(&ln->nsm_clnt_lock); | |
e498daa8 | 136 | if (clnt != NULL) |
e9406db2 SK |
137 | rpc_shutdown_client(clnt); |
138 | } | |
139 | ||
0e1cb5c0 | 140 | static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res, |
cb7323ff | 141 | struct rpc_clnt *clnt) |
1da177e4 | 142 | { |
1da177e4 | 143 | int status; |
a4846750 | 144 | struct nsm_args args = { |
cab2d3c9 | 145 | .priv = &nsm->sm_priv, |
a4846750 CL |
146 | .prog = NLM_PROGRAM, |
147 | .vers = 3, | |
148 | .proc = NLMPROC_NSM_NOTIFY, | |
29ed1407 | 149 | .mon_name = nsm->sm_mon_name, |
cb7323ff | 150 | .nodename = clnt->cl_nodename, |
a4846750 | 151 | }; |
dead28da CL |
152 | struct rpc_message msg = { |
153 | .rpc_argp = &args, | |
154 | .rpc_resp = res, | |
155 | }; | |
1da177e4 | 156 | |
1da177e4 LT |
157 | memset(res, 0, sizeof(*res)); |
158 | ||
dead28da | 159 | msg.rpc_proc = &clnt->cl_procinfo[proc]; |
e9406db2 | 160 | status = rpc_call_sync(clnt, &msg, RPC_TASK_SOFTCONN); |
1da177e4 | 161 | if (status < 0) |
5acf4315 CL |
162 | dprintk("lockd: NSM upcall RPC failed, status=%d\n", |
163 | status); | |
1da177e4 LT |
164 | else |
165 | status = 0; | |
1da177e4 LT |
166 | return status; |
167 | } | |
168 | ||
1e49323c CL |
169 | /** |
170 | * nsm_monitor - Notify a peer in case we reboot | |
171 | * @host: pointer to nlm_host of peer to notify | |
172 | * | |
173 | * If this peer is not already monitored, this function sends an | |
174 | * upcall to the local rpc.statd to record the name/address of | |
175 | * the peer to notify in case we reboot. | |
176 | * | |
177 | * Returns zero if the peer is monitored by the local rpc.statd; | |
178 | * otherwise a negative errno value is returned. | |
1da177e4 | 179 | */ |
1e49323c | 180 | int nsm_monitor(const struct nlm_host *host) |
1da177e4 | 181 | { |
8dead0db | 182 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 LT |
183 | struct nsm_res res; |
184 | int status; | |
cb7323ff | 185 | struct rpc_clnt *clnt; |
1da177e4 | 186 | |
9fee4902 | 187 | dprintk("lockd: nsm_monitor(%s)\n", nsm->sm_name); |
8dead0db OK |
188 | |
189 | if (nsm->sm_monitored) | |
977faf39 | 190 | return 0; |
1da177e4 | 191 | |
29ed1407 CL |
192 | /* |
193 | * Choose whether to record the caller_name or IP address of | |
194 | * this peer in the local rpc.statd's database. | |
195 | */ | |
196 | nsm->sm_mon_name = nsm_use_hostnames ? nsm->sm_name : nsm->sm_addrbuf; | |
197 | ||
cb7323ff SK |
198 | clnt = nsm_client_get(host->net); |
199 | if (IS_ERR(clnt)) { | |
200 | status = PTR_ERR(clnt); | |
201 | dprintk("lockd: failed to create NSM upcall transport, " | |
202 | "status=%d, net=%p\n", status, host->net); | |
203 | return status; | |
204 | } | |
205 | ||
206 | status = nsm_mon_unmon(nsm, NSMPROC_MON, &res, clnt); | |
6c9dc425 | 207 | if (unlikely(res.status != 0)) |
5d254b11 | 208 | status = -EIO; |
6c9dc425 | 209 | if (unlikely(status < 0)) { |
9fee4902 | 210 | printk(KERN_NOTICE "lockd: cannot monitor %s\n", nsm->sm_name); |
6c9dc425 CL |
211 | return status; |
212 | } | |
213 | ||
214 | nsm->sm_monitored = 1; | |
215 | if (unlikely(nsm_local_state != res.state)) { | |
216 | nsm_local_state = res.state; | |
217 | dprintk("lockd: NSM state changed to %d\n", nsm_local_state); | |
218 | } | |
219 | return 0; | |
1da177e4 LT |
220 | } |
221 | ||
356c3eb4 CL |
222 | /** |
223 | * nsm_unmonitor - Unregister peer notification | |
224 | * @host: pointer to nlm_host of peer to stop monitoring | |
225 | * | |
226 | * If this peer is monitored, this function sends an upcall to | |
227 | * tell the local rpc.statd not to send this peer a notification | |
228 | * when we reboot. | |
1da177e4 | 229 | */ |
356c3eb4 | 230 | void nsm_unmonitor(const struct nlm_host *host) |
1da177e4 | 231 | { |
8dead0db | 232 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 | 233 | struct nsm_res res; |
356c3eb4 | 234 | int status; |
1da177e4 | 235 | |
9502c522 OK |
236 | if (atomic_read(&nsm->sm_count) == 1 |
237 | && nsm->sm_monitored && !nsm->sm_sticky) { | |
cb7323ff SK |
238 | struct lockd_net *ln = net_generic(host->net, lockd_net_id); |
239 | ||
9fee4902 | 240 | dprintk("lockd: nsm_unmonitor(%s)\n", nsm->sm_name); |
9502c522 | 241 | |
cb7323ff | 242 | status = nsm_mon_unmon(nsm, NSMPROC_UNMON, &res, ln->nsm_clnt); |
0c7aef45 CL |
243 | if (res.status != 0) |
244 | status = -EIO; | |
977faf39 | 245 | if (status < 0) |
9502c522 | 246 | printk(KERN_NOTICE "lockd: cannot unmonitor %s\n", |
9fee4902 | 247 | nsm->sm_name); |
9502c522 OK |
248 | else |
249 | nsm->sm_monitored = 0; | |
cb7323ff SK |
250 | |
251 | nsm_client_put(host->net); | |
977faf39 | 252 | } |
1da177e4 LT |
253 | } |
254 | ||
3420a8c4 CL |
255 | static struct nsm_handle *nsm_lookup_hostname(const char *hostname, |
256 | const size_t len) | |
257 | { | |
258 | struct nsm_handle *nsm; | |
259 | ||
260 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
261 | if (strlen(nsm->sm_name) == len && | |
262 | memcmp(nsm->sm_name, hostname, len) == 0) | |
263 | return nsm; | |
264 | return NULL; | |
265 | } | |
266 | ||
77a3ef33 CL |
267 | static struct nsm_handle *nsm_lookup_addr(const struct sockaddr *sap) |
268 | { | |
269 | struct nsm_handle *nsm; | |
270 | ||
271 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
4516fc04 | 272 | if (rpc_cmp_addr(nsm_addr(nsm), sap)) |
77a3ef33 CL |
273 | return nsm; |
274 | return NULL; | |
275 | } | |
276 | ||
3420a8c4 CL |
277 | static struct nsm_handle *nsm_lookup_priv(const struct nsm_private *priv) |
278 | { | |
279 | struct nsm_handle *nsm; | |
280 | ||
281 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
282 | if (memcmp(nsm->sm_priv.data, priv->data, | |
283 | sizeof(priv->data)) == 0) | |
284 | return nsm; | |
285 | return NULL; | |
286 | } | |
287 | ||
7e44d3be CL |
288 | /* |
289 | * Construct a unique cookie to match this nsm_handle to this monitored | |
290 | * host. It is passed to the local rpc.statd via NSMPROC_MON, and | |
291 | * returned via NLMPROC_SM_NOTIFY, in the "priv" field of these | |
292 | * requests. | |
293 | * | |
94da7663 CL |
294 | * The NSM protocol requires that these cookies be unique while the |
295 | * system is running. We prefer a stronger requirement of making them | |
296 | * unique across reboots. If user space bugs cause a stale cookie to | |
297 | * be sent to the kernel, it could cause the wrong host to lose its | |
298 | * lock state if cookies were not unique across reboots. | |
299 | * | |
300 | * The cookies are exposed only to local user space via loopback. They | |
301 | * do not appear on the physical network. If we want greater security | |
302 | * for some reason, nsm_init_private() could perform a one-way hash to | |
303 | * obscure the contents of the cookie. | |
7e44d3be CL |
304 | */ |
305 | static void nsm_init_private(struct nsm_handle *nsm) | |
306 | { | |
94da7663 CL |
307 | u64 *p = (u64 *)&nsm->sm_priv.data; |
308 | struct timespec ts; | |
ad5b365c | 309 | s64 ns; |
94da7663 CL |
310 | |
311 | ktime_get_ts(&ts); | |
ad5b365c MR |
312 | ns = timespec_to_ns(&ts); |
313 | put_unaligned(ns, p); | |
314 | put_unaligned((unsigned long)nsm, p + 1); | |
7e44d3be CL |
315 | } |
316 | ||
b39b897c CL |
317 | static struct nsm_handle *nsm_create_handle(const struct sockaddr *sap, |
318 | const size_t salen, | |
319 | const char *hostname, | |
320 | const size_t hostname_len) | |
321 | { | |
322 | struct nsm_handle *new; | |
323 | ||
324 | new = kzalloc(sizeof(*new) + hostname_len + 1, GFP_KERNEL); | |
325 | if (unlikely(new == NULL)) | |
326 | return NULL; | |
327 | ||
328 | atomic_set(&new->sm_count, 1); | |
329 | new->sm_name = (char *)(new + 1); | |
330 | memcpy(nsm_addr(new), sap, salen); | |
331 | new->sm_addrlen = salen; | |
332 | nsm_init_private(new); | |
c15128c5 CL |
333 | |
334 | if (rpc_ntop(nsm_addr(new), new->sm_addrbuf, | |
335 | sizeof(new->sm_addrbuf)) == 0) | |
336 | (void)snprintf(new->sm_addrbuf, sizeof(new->sm_addrbuf), | |
337 | "unsupported address family"); | |
b39b897c CL |
338 | memcpy(new->sm_name, hostname, hostname_len); |
339 | new->sm_name[hostname_len] = '\0'; | |
340 | ||
341 | return new; | |
342 | } | |
343 | ||
67c6d107 | 344 | /** |
92fd91b9 | 345 | * nsm_get_handle - Find or create a cached nsm_handle |
67c6d107 CL |
346 | * @sap: pointer to socket address of handle to find |
347 | * @salen: length of socket address | |
348 | * @hostname: pointer to C string containing hostname to find | |
349 | * @hostname_len: length of C string | |
67c6d107 | 350 | * |
92fd91b9 | 351 | * Behavior is modulated by the global nsm_use_hostnames variable. |
67c6d107 | 352 | * |
92fd91b9 CL |
353 | * Returns a cached nsm_handle after bumping its ref count, or |
354 | * returns a fresh nsm_handle if a handle that matches @sap and/or | |
355 | * @hostname cannot be found in the handle cache. Returns NULL if | |
356 | * an error occurs. | |
67c6d107 | 357 | */ |
92fd91b9 CL |
358 | struct nsm_handle *nsm_get_handle(const struct sockaddr *sap, |
359 | const size_t salen, const char *hostname, | |
360 | const size_t hostname_len) | |
67c6d107 | 361 | { |
77a3ef33 | 362 | struct nsm_handle *cached, *new = NULL; |
67c6d107 | 363 | |
67c6d107 CL |
364 | if (hostname && memchr(hostname, '/', hostname_len) != NULL) { |
365 | if (printk_ratelimit()) { | |
366 | printk(KERN_WARNING "Invalid hostname \"%.*s\" " | |
367 | "in NFS lock request\n", | |
368 | (int)hostname_len, hostname); | |
369 | } | |
370 | return NULL; | |
371 | } | |
372 | ||
373 | retry: | |
374 | spin_lock(&nsm_lock); | |
77a3ef33 CL |
375 | |
376 | if (nsm_use_hostnames && hostname != NULL) | |
377 | cached = nsm_lookup_hostname(hostname, hostname_len); | |
378 | else | |
379 | cached = nsm_lookup_addr(sap); | |
380 | ||
381 | if (cached != NULL) { | |
382 | atomic_inc(&cached->sm_count); | |
383 | spin_unlock(&nsm_lock); | |
384 | kfree(new); | |
385 | dprintk("lockd: found nsm_handle for %s (%s), " | |
386 | "cnt %d\n", cached->sm_name, | |
387 | cached->sm_addrbuf, | |
388 | atomic_read(&cached->sm_count)); | |
389 | return cached; | |
67c6d107 | 390 | } |
77a3ef33 CL |
391 | |
392 | if (new != NULL) { | |
393 | list_add(&new->sm_link, &nsm_handles); | |
394 | spin_unlock(&nsm_lock); | |
5cf1c4b1 | 395 | dprintk("lockd: created nsm_handle for %s (%s)\n", |
77a3ef33 CL |
396 | new->sm_name, new->sm_addrbuf); |
397 | return new; | |
67c6d107 | 398 | } |
77a3ef33 | 399 | |
67c6d107 CL |
400 | spin_unlock(&nsm_lock); |
401 | ||
77a3ef33 CL |
402 | new = nsm_create_handle(sap, salen, hostname, hostname_len); |
403 | if (unlikely(new == NULL)) | |
67c6d107 | 404 | return NULL; |
67c6d107 | 405 | goto retry; |
67c6d107 CL |
406 | } |
407 | ||
3420a8c4 CL |
408 | /** |
409 | * nsm_reboot_lookup - match NLMPROC_SM_NOTIFY arguments to an nsm_handle | |
410 | * @info: pointer to NLMPROC_SM_NOTIFY arguments | |
411 | * | |
7e469af9 JL |
412 | * Returns a matching nsm_handle if found in the nsm cache. The returned |
413 | * nsm_handle's reference count is bumped. Otherwise returns NULL if some | |
414 | * error occurred. | |
3420a8c4 CL |
415 | */ |
416 | struct nsm_handle *nsm_reboot_lookup(const struct nlm_reboot *info) | |
417 | { | |
418 | struct nsm_handle *cached; | |
419 | ||
420 | spin_lock(&nsm_lock); | |
421 | ||
94da7663 | 422 | cached = nsm_lookup_priv(&info->priv); |
3420a8c4 CL |
423 | if (unlikely(cached == NULL)) { |
424 | spin_unlock(&nsm_lock); | |
425 | dprintk("lockd: never saw rebooted peer '%.*s' before\n", | |
426 | info->len, info->mon); | |
427 | return cached; | |
428 | } | |
429 | ||
430 | atomic_inc(&cached->sm_count); | |
431 | spin_unlock(&nsm_lock); | |
432 | ||
3420a8c4 CL |
433 | dprintk("lockd: host %s (%s) rebooted, cnt %d\n", |
434 | cached->sm_name, cached->sm_addrbuf, | |
435 | atomic_read(&cached->sm_count)); | |
436 | return cached; | |
437 | } | |
438 | ||
67c6d107 CL |
439 | /** |
440 | * nsm_release - Release an NSM handle | |
441 | * @nsm: pointer to handle to be released | |
442 | * | |
443 | */ | |
444 | void nsm_release(struct nsm_handle *nsm) | |
445 | { | |
67c6d107 CL |
446 | if (atomic_dec_and_lock(&nsm->sm_count, &nsm_lock)) { |
447 | list_del(&nsm->sm_link); | |
448 | spin_unlock(&nsm_lock); | |
5cf1c4b1 CL |
449 | dprintk("lockd: destroyed nsm_handle for %s (%s)\n", |
450 | nsm->sm_name, nsm->sm_addrbuf); | |
67c6d107 CL |
451 | kfree(nsm); |
452 | } | |
453 | } | |
454 | ||
1da177e4 LT |
455 | /* |
456 | * XDR functions for NSM. | |
2ca7754d CL |
457 | * |
458 | * See http://www.opengroup.org/ for details on the Network | |
459 | * Status Monitor wire protocol. | |
1da177e4 LT |
460 | */ |
461 | ||
49b17004 | 462 | static void encode_nsm_string(struct xdr_stream *xdr, const char *string) |
099bd05f | 463 | { |
03eb1dcb CL |
464 | const u32 len = strlen(string); |
465 | __be32 *p; | |
466 | ||
49b17004 | 467 | p = xdr_reserve_space(xdr, 4 + len); |
03eb1dcb | 468 | xdr_encode_opaque(p, string, len); |
099bd05f CL |
469 | } |
470 | ||
49695174 CL |
471 | /* |
472 | * "mon_name" specifies the host to be monitored. | |
49695174 | 473 | */ |
49b17004 | 474 | static void encode_mon_name(struct xdr_stream *xdr, const struct nsm_args *argp) |
49695174 | 475 | { |
49b17004 | 476 | encode_nsm_string(xdr, argp->mon_name); |
49695174 CL |
477 | } |
478 | ||
850c95fd CL |
479 | /* |
480 | * The "my_id" argument specifies the hostname and RPC procedure | |
481 | * to be called when the status manager receives notification | |
36e8e668 | 482 | * (via the NLMPROC_SM_NOTIFY call) that the state of host "mon_name" |
850c95fd CL |
483 | * has changed. |
484 | */ | |
49b17004 | 485 | static void encode_my_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
850c95fd | 486 | { |
03eb1dcb CL |
487 | __be32 *p; |
488 | ||
303a7ce9 | 489 | encode_nsm_string(xdr, argp->nodename); |
49b17004 CL |
490 | p = xdr_reserve_space(xdr, 4 + 4 + 4); |
491 | *p++ = cpu_to_be32(argp->prog); | |
492 | *p++ = cpu_to_be32(argp->vers); | |
493 | *p = cpu_to_be32(argp->proc); | |
850c95fd CL |
494 | } |
495 | ||
ea72a7f1 CL |
496 | /* |
497 | * The "mon_id" argument specifies the non-private arguments | |
36e8e668 | 498 | * of an NSMPROC_MON or NSMPROC_UNMON call. |
ea72a7f1 | 499 | */ |
49b17004 | 500 | static void encode_mon_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
ea72a7f1 | 501 | { |
49b17004 CL |
502 | encode_mon_name(xdr, argp); |
503 | encode_my_id(xdr, argp); | |
ea72a7f1 CL |
504 | } |
505 | ||
0490a54a CL |
506 | /* |
507 | * The "priv" argument may contain private information required | |
36e8e668 CL |
508 | * by the NSMPROC_MON call. This information will be supplied in the |
509 | * NLMPROC_SM_NOTIFY call. | |
0490a54a | 510 | */ |
49b17004 | 511 | static void encode_priv(struct xdr_stream *xdr, const struct nsm_args *argp) |
0490a54a | 512 | { |
03eb1dcb CL |
513 | __be32 *p; |
514 | ||
515 | p = xdr_reserve_space(xdr, SM_PRIV_SIZE); | |
cab2d3c9 | 516 | xdr_encode_opaque_fixed(p, argp->priv->data, SM_PRIV_SIZE); |
0490a54a CL |
517 | } |
518 | ||
9f06c719 CL |
519 | static void nsm_xdr_enc_mon(struct rpc_rqst *req, struct xdr_stream *xdr, |
520 | const struct nsm_args *argp) | |
1da177e4 | 521 | { |
9f06c719 CL |
522 | encode_mon_id(xdr, argp); |
523 | encode_priv(xdr, argp); | |
1da177e4 LT |
524 | } |
525 | ||
9f06c719 CL |
526 | static void nsm_xdr_enc_unmon(struct rpc_rqst *req, struct xdr_stream *xdr, |
527 | const struct nsm_args *argp) | |
1da177e4 | 528 | { |
9f06c719 | 529 | encode_mon_id(xdr, argp); |
1da177e4 LT |
530 | } |
531 | ||
bf269551 CL |
532 | static int nsm_xdr_dec_stat_res(struct rpc_rqst *rqstp, |
533 | struct xdr_stream *xdr, | |
534 | struct nsm_res *resp) | |
1da177e4 | 535 | { |
bf269551 | 536 | __be32 *p; |
03eb1dcb | 537 | |
bf269551 | 538 | p = xdr_inline_decode(xdr, 4 + 4); |
03eb1dcb CL |
539 | if (unlikely(p == NULL)) |
540 | return -EIO; | |
49b17004 CL |
541 | resp->status = be32_to_cpup(p++); |
542 | resp->state = be32_to_cpup(p); | |
03eb1dcb | 543 | |
bf269551 CL |
544 | dprintk("lockd: %s status %d state %d\n", |
545 | __func__, resp->status, resp->state); | |
1da177e4 LT |
546 | return 0; |
547 | } | |
548 | ||
bf269551 CL |
549 | static int nsm_xdr_dec_stat(struct rpc_rqst *rqstp, |
550 | struct xdr_stream *xdr, | |
551 | struct nsm_res *resp) | |
1da177e4 | 552 | { |
bf269551 | 553 | __be32 *p; |
03eb1dcb | 554 | |
bf269551 | 555 | p = xdr_inline_decode(xdr, 4); |
03eb1dcb CL |
556 | if (unlikely(p == NULL)) |
557 | return -EIO; | |
49b17004 | 558 | resp->state = be32_to_cpup(p); |
03eb1dcb | 559 | |
bf269551 | 560 | dprintk("lockd: %s state %d\n", __func__, 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, | |
9f06c719 | 576 | .p_encode = (kxdreproc_t)nsm_xdr_enc_mon, |
bf269551 | 577 | .p_decode = (kxdrdproc_t)nsm_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, | |
9f06c719 | 585 | .p_encode = (kxdreproc_t)nsm_xdr_enc_unmon, |
bf269551 | 586 | .p_decode = (kxdrdproc_t)nsm_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 | ||
a613fa16 | 594 | static const struct rpc_version nsm_version1 = { |
e8c96f8c TK |
595 | .number = 1, |
596 | .nrprocs = ARRAY_SIZE(nsm_procedures), | |
1da177e4 LT |
597 | .procs = nsm_procedures |
598 | }; | |
599 | ||
a613fa16 | 600 | static const struct rpc_version *nsm_version[] = { |
1da177e4 LT |
601 | [1] = &nsm_version1, |
602 | }; | |
603 | ||
604 | static struct rpc_stat nsm_stats; | |
605 | ||
a613fa16 | 606 | static const struct rpc_program nsm_program = { |
1da177e4 | 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 | }; |