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 | |
cb7323ff | 157 | BUG_ON(clnt == NULL); |
1da177e4 | 158 | |
1da177e4 LT |
159 | memset(res, 0, sizeof(*res)); |
160 | ||
dead28da | 161 | msg.rpc_proc = &clnt->cl_procinfo[proc]; |
e9406db2 | 162 | status = rpc_call_sync(clnt, &msg, RPC_TASK_SOFTCONN); |
1da177e4 | 163 | if (status < 0) |
5acf4315 CL |
164 | dprintk("lockd: NSM upcall RPC failed, status=%d\n", |
165 | status); | |
1da177e4 LT |
166 | else |
167 | status = 0; | |
1da177e4 LT |
168 | return status; |
169 | } | |
170 | ||
1e49323c CL |
171 | /** |
172 | * nsm_monitor - Notify a peer in case we reboot | |
173 | * @host: pointer to nlm_host of peer to notify | |
174 | * | |
175 | * If this peer is not already monitored, this function sends an | |
176 | * upcall to the local rpc.statd to record the name/address of | |
177 | * the peer to notify in case we reboot. | |
178 | * | |
179 | * Returns zero if the peer is monitored by the local rpc.statd; | |
180 | * otherwise a negative errno value is returned. | |
1da177e4 | 181 | */ |
1e49323c | 182 | int nsm_monitor(const struct nlm_host *host) |
1da177e4 | 183 | { |
8dead0db | 184 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 LT |
185 | struct nsm_res res; |
186 | int status; | |
cb7323ff | 187 | struct rpc_clnt *clnt; |
1da177e4 | 188 | |
9fee4902 | 189 | dprintk("lockd: nsm_monitor(%s)\n", nsm->sm_name); |
8dead0db OK |
190 | |
191 | if (nsm->sm_monitored) | |
977faf39 | 192 | return 0; |
1da177e4 | 193 | |
29ed1407 CL |
194 | /* |
195 | * Choose whether to record the caller_name or IP address of | |
196 | * this peer in the local rpc.statd's database. | |
197 | */ | |
198 | nsm->sm_mon_name = nsm_use_hostnames ? nsm->sm_name : nsm->sm_addrbuf; | |
199 | ||
cb7323ff SK |
200 | clnt = nsm_client_get(host->net); |
201 | if (IS_ERR(clnt)) { | |
202 | status = PTR_ERR(clnt); | |
203 | dprintk("lockd: failed to create NSM upcall transport, " | |
204 | "status=%d, net=%p\n", status, host->net); | |
205 | return status; | |
206 | } | |
207 | ||
208 | status = nsm_mon_unmon(nsm, NSMPROC_MON, &res, clnt); | |
6c9dc425 | 209 | if (unlikely(res.status != 0)) |
5d254b11 | 210 | status = -EIO; |
6c9dc425 | 211 | if (unlikely(status < 0)) { |
9fee4902 | 212 | printk(KERN_NOTICE "lockd: cannot monitor %s\n", nsm->sm_name); |
6c9dc425 CL |
213 | return status; |
214 | } | |
215 | ||
216 | nsm->sm_monitored = 1; | |
217 | if (unlikely(nsm_local_state != res.state)) { | |
218 | nsm_local_state = res.state; | |
219 | dprintk("lockd: NSM state changed to %d\n", nsm_local_state); | |
220 | } | |
221 | return 0; | |
1da177e4 LT |
222 | } |
223 | ||
356c3eb4 CL |
224 | /** |
225 | * nsm_unmonitor - Unregister peer notification | |
226 | * @host: pointer to nlm_host of peer to stop monitoring | |
227 | * | |
228 | * If this peer is monitored, this function sends an upcall to | |
229 | * tell the local rpc.statd not to send this peer a notification | |
230 | * when we reboot. | |
1da177e4 | 231 | */ |
356c3eb4 | 232 | void nsm_unmonitor(const struct nlm_host *host) |
1da177e4 | 233 | { |
8dead0db | 234 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 | 235 | struct nsm_res res; |
356c3eb4 | 236 | int status; |
1da177e4 | 237 | |
9502c522 OK |
238 | if (atomic_read(&nsm->sm_count) == 1 |
239 | && nsm->sm_monitored && !nsm->sm_sticky) { | |
cb7323ff SK |
240 | struct lockd_net *ln = net_generic(host->net, lockd_net_id); |
241 | ||
9fee4902 | 242 | dprintk("lockd: nsm_unmonitor(%s)\n", nsm->sm_name); |
9502c522 | 243 | |
cb7323ff | 244 | status = nsm_mon_unmon(nsm, NSMPROC_UNMON, &res, ln->nsm_clnt); |
0c7aef45 CL |
245 | if (res.status != 0) |
246 | status = -EIO; | |
977faf39 | 247 | if (status < 0) |
9502c522 | 248 | printk(KERN_NOTICE "lockd: cannot unmonitor %s\n", |
9fee4902 | 249 | nsm->sm_name); |
9502c522 OK |
250 | else |
251 | nsm->sm_monitored = 0; | |
cb7323ff SK |
252 | |
253 | nsm_client_put(host->net); | |
977faf39 | 254 | } |
1da177e4 LT |
255 | } |
256 | ||
3420a8c4 CL |
257 | static struct nsm_handle *nsm_lookup_hostname(const char *hostname, |
258 | const size_t len) | |
259 | { | |
260 | struct nsm_handle *nsm; | |
261 | ||
262 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
263 | if (strlen(nsm->sm_name) == len && | |
264 | memcmp(nsm->sm_name, hostname, len) == 0) | |
265 | return nsm; | |
266 | return NULL; | |
267 | } | |
268 | ||
77a3ef33 CL |
269 | static struct nsm_handle *nsm_lookup_addr(const struct sockaddr *sap) |
270 | { | |
271 | struct nsm_handle *nsm; | |
272 | ||
273 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
4516fc04 | 274 | if (rpc_cmp_addr(nsm_addr(nsm), sap)) |
77a3ef33 CL |
275 | return nsm; |
276 | return NULL; | |
277 | } | |
278 | ||
3420a8c4 CL |
279 | static struct nsm_handle *nsm_lookup_priv(const struct nsm_private *priv) |
280 | { | |
281 | struct nsm_handle *nsm; | |
282 | ||
283 | list_for_each_entry(nsm, &nsm_handles, sm_link) | |
284 | if (memcmp(nsm->sm_priv.data, priv->data, | |
285 | sizeof(priv->data)) == 0) | |
286 | return nsm; | |
287 | return NULL; | |
288 | } | |
289 | ||
7e44d3be CL |
290 | /* |
291 | * Construct a unique cookie to match this nsm_handle to this monitored | |
292 | * host. It is passed to the local rpc.statd via NSMPROC_MON, and | |
293 | * returned via NLMPROC_SM_NOTIFY, in the "priv" field of these | |
294 | * requests. | |
295 | * | |
94da7663 CL |
296 | * The NSM protocol requires that these cookies be unique while the |
297 | * system is running. We prefer a stronger requirement of making them | |
298 | * unique across reboots. If user space bugs cause a stale cookie to | |
299 | * be sent to the kernel, it could cause the wrong host to lose its | |
300 | * lock state if cookies were not unique across reboots. | |
301 | * | |
302 | * The cookies are exposed only to local user space via loopback. They | |
303 | * do not appear on the physical network. If we want greater security | |
304 | * for some reason, nsm_init_private() could perform a one-way hash to | |
305 | * obscure the contents of the cookie. | |
7e44d3be CL |
306 | */ |
307 | static void nsm_init_private(struct nsm_handle *nsm) | |
308 | { | |
94da7663 CL |
309 | u64 *p = (u64 *)&nsm->sm_priv.data; |
310 | struct timespec ts; | |
ad5b365c | 311 | s64 ns; |
94da7663 CL |
312 | |
313 | ktime_get_ts(&ts); | |
ad5b365c MR |
314 | ns = timespec_to_ns(&ts); |
315 | put_unaligned(ns, p); | |
316 | put_unaligned((unsigned long)nsm, p + 1); | |
7e44d3be CL |
317 | } |
318 | ||
b39b897c CL |
319 | static struct nsm_handle *nsm_create_handle(const struct sockaddr *sap, |
320 | const size_t salen, | |
321 | const char *hostname, | |
322 | const size_t hostname_len) | |
323 | { | |
324 | struct nsm_handle *new; | |
325 | ||
326 | new = kzalloc(sizeof(*new) + hostname_len + 1, GFP_KERNEL); | |
327 | if (unlikely(new == NULL)) | |
328 | return NULL; | |
329 | ||
330 | atomic_set(&new->sm_count, 1); | |
331 | new->sm_name = (char *)(new + 1); | |
332 | memcpy(nsm_addr(new), sap, salen); | |
333 | new->sm_addrlen = salen; | |
334 | nsm_init_private(new); | |
c15128c5 CL |
335 | |
336 | if (rpc_ntop(nsm_addr(new), new->sm_addrbuf, | |
337 | sizeof(new->sm_addrbuf)) == 0) | |
338 | (void)snprintf(new->sm_addrbuf, sizeof(new->sm_addrbuf), | |
339 | "unsupported address family"); | |
b39b897c CL |
340 | memcpy(new->sm_name, hostname, hostname_len); |
341 | new->sm_name[hostname_len] = '\0'; | |
342 | ||
343 | return new; | |
344 | } | |
345 | ||
67c6d107 | 346 | /** |
92fd91b9 | 347 | * nsm_get_handle - Find or create a cached nsm_handle |
67c6d107 CL |
348 | * @sap: pointer to socket address of handle to find |
349 | * @salen: length of socket address | |
350 | * @hostname: pointer to C string containing hostname to find | |
351 | * @hostname_len: length of C string | |
67c6d107 | 352 | * |
92fd91b9 | 353 | * Behavior is modulated by the global nsm_use_hostnames variable. |
67c6d107 | 354 | * |
92fd91b9 CL |
355 | * Returns a cached nsm_handle after bumping its ref count, or |
356 | * returns a fresh nsm_handle if a handle that matches @sap and/or | |
357 | * @hostname cannot be found in the handle cache. Returns NULL if | |
358 | * an error occurs. | |
67c6d107 | 359 | */ |
92fd91b9 CL |
360 | struct nsm_handle *nsm_get_handle(const struct sockaddr *sap, |
361 | const size_t salen, const char *hostname, | |
362 | const size_t hostname_len) | |
67c6d107 | 363 | { |
77a3ef33 | 364 | struct nsm_handle *cached, *new = NULL; |
67c6d107 | 365 | |
67c6d107 CL |
366 | if (hostname && memchr(hostname, '/', hostname_len) != NULL) { |
367 | if (printk_ratelimit()) { | |
368 | printk(KERN_WARNING "Invalid hostname \"%.*s\" " | |
369 | "in NFS lock request\n", | |
370 | (int)hostname_len, hostname); | |
371 | } | |
372 | return NULL; | |
373 | } | |
374 | ||
375 | retry: | |
376 | spin_lock(&nsm_lock); | |
77a3ef33 CL |
377 | |
378 | if (nsm_use_hostnames && hostname != NULL) | |
379 | cached = nsm_lookup_hostname(hostname, hostname_len); | |
380 | else | |
381 | cached = nsm_lookup_addr(sap); | |
382 | ||
383 | if (cached != NULL) { | |
384 | atomic_inc(&cached->sm_count); | |
385 | spin_unlock(&nsm_lock); | |
386 | kfree(new); | |
387 | dprintk("lockd: found nsm_handle for %s (%s), " | |
388 | "cnt %d\n", cached->sm_name, | |
389 | cached->sm_addrbuf, | |
390 | atomic_read(&cached->sm_count)); | |
391 | return cached; | |
67c6d107 | 392 | } |
77a3ef33 CL |
393 | |
394 | if (new != NULL) { | |
395 | list_add(&new->sm_link, &nsm_handles); | |
396 | spin_unlock(&nsm_lock); | |
5cf1c4b1 | 397 | dprintk("lockd: created nsm_handle for %s (%s)\n", |
77a3ef33 CL |
398 | new->sm_name, new->sm_addrbuf); |
399 | return new; | |
67c6d107 | 400 | } |
77a3ef33 | 401 | |
67c6d107 CL |
402 | spin_unlock(&nsm_lock); |
403 | ||
77a3ef33 CL |
404 | new = nsm_create_handle(sap, salen, hostname, hostname_len); |
405 | if (unlikely(new == NULL)) | |
67c6d107 | 406 | return NULL; |
67c6d107 | 407 | goto retry; |
67c6d107 CL |
408 | } |
409 | ||
3420a8c4 CL |
410 | /** |
411 | * nsm_reboot_lookup - match NLMPROC_SM_NOTIFY arguments to an nsm_handle | |
412 | * @info: pointer to NLMPROC_SM_NOTIFY arguments | |
413 | * | |
7e469af9 JL |
414 | * Returns a matching nsm_handle if found in the nsm cache. The returned |
415 | * nsm_handle's reference count is bumped. Otherwise returns NULL if some | |
416 | * error occurred. | |
3420a8c4 CL |
417 | */ |
418 | struct nsm_handle *nsm_reboot_lookup(const struct nlm_reboot *info) | |
419 | { | |
420 | struct nsm_handle *cached; | |
421 | ||
422 | spin_lock(&nsm_lock); | |
423 | ||
94da7663 | 424 | cached = nsm_lookup_priv(&info->priv); |
3420a8c4 CL |
425 | if (unlikely(cached == NULL)) { |
426 | spin_unlock(&nsm_lock); | |
427 | dprintk("lockd: never saw rebooted peer '%.*s' before\n", | |
428 | info->len, info->mon); | |
429 | return cached; | |
430 | } | |
431 | ||
432 | atomic_inc(&cached->sm_count); | |
433 | spin_unlock(&nsm_lock); | |
434 | ||
3420a8c4 CL |
435 | dprintk("lockd: host %s (%s) rebooted, cnt %d\n", |
436 | cached->sm_name, cached->sm_addrbuf, | |
437 | atomic_read(&cached->sm_count)); | |
438 | return cached; | |
439 | } | |
440 | ||
67c6d107 CL |
441 | /** |
442 | * nsm_release - Release an NSM handle | |
443 | * @nsm: pointer to handle to be released | |
444 | * | |
445 | */ | |
446 | void nsm_release(struct nsm_handle *nsm) | |
447 | { | |
67c6d107 CL |
448 | if (atomic_dec_and_lock(&nsm->sm_count, &nsm_lock)) { |
449 | list_del(&nsm->sm_link); | |
450 | spin_unlock(&nsm_lock); | |
5cf1c4b1 CL |
451 | dprintk("lockd: destroyed nsm_handle for %s (%s)\n", |
452 | nsm->sm_name, nsm->sm_addrbuf); | |
67c6d107 CL |
453 | kfree(nsm); |
454 | } | |
455 | } | |
456 | ||
1da177e4 LT |
457 | /* |
458 | * XDR functions for NSM. | |
2ca7754d CL |
459 | * |
460 | * See http://www.opengroup.org/ for details on the Network | |
461 | * Status Monitor wire protocol. | |
1da177e4 LT |
462 | */ |
463 | ||
49b17004 | 464 | static void encode_nsm_string(struct xdr_stream *xdr, const char *string) |
099bd05f | 465 | { |
03eb1dcb CL |
466 | const u32 len = strlen(string); |
467 | __be32 *p; | |
468 | ||
49b17004 CL |
469 | BUG_ON(len > SM_MAXSTRLEN); |
470 | p = xdr_reserve_space(xdr, 4 + len); | |
03eb1dcb | 471 | xdr_encode_opaque(p, string, len); |
099bd05f CL |
472 | } |
473 | ||
49695174 CL |
474 | /* |
475 | * "mon_name" specifies the host to be monitored. | |
49695174 | 476 | */ |
49b17004 | 477 | static void encode_mon_name(struct xdr_stream *xdr, const struct nsm_args *argp) |
49695174 | 478 | { |
49b17004 | 479 | encode_nsm_string(xdr, argp->mon_name); |
49695174 CL |
480 | } |
481 | ||
850c95fd CL |
482 | /* |
483 | * The "my_id" argument specifies the hostname and RPC procedure | |
484 | * to be called when the status manager receives notification | |
36e8e668 | 485 | * (via the NLMPROC_SM_NOTIFY call) that the state of host "mon_name" |
850c95fd CL |
486 | * has changed. |
487 | */ | |
49b17004 | 488 | static void encode_my_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
850c95fd | 489 | { |
03eb1dcb CL |
490 | __be32 *p; |
491 | ||
303a7ce9 | 492 | encode_nsm_string(xdr, argp->nodename); |
49b17004 CL |
493 | p = xdr_reserve_space(xdr, 4 + 4 + 4); |
494 | *p++ = cpu_to_be32(argp->prog); | |
495 | *p++ = cpu_to_be32(argp->vers); | |
496 | *p = cpu_to_be32(argp->proc); | |
850c95fd CL |
497 | } |
498 | ||
ea72a7f1 CL |
499 | /* |
500 | * The "mon_id" argument specifies the non-private arguments | |
36e8e668 | 501 | * of an NSMPROC_MON or NSMPROC_UNMON call. |
ea72a7f1 | 502 | */ |
49b17004 | 503 | static void encode_mon_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
ea72a7f1 | 504 | { |
49b17004 CL |
505 | encode_mon_name(xdr, argp); |
506 | encode_my_id(xdr, argp); | |
ea72a7f1 CL |
507 | } |
508 | ||
0490a54a CL |
509 | /* |
510 | * The "priv" argument may contain private information required | |
36e8e668 CL |
511 | * by the NSMPROC_MON call. This information will be supplied in the |
512 | * NLMPROC_SM_NOTIFY call. | |
0490a54a | 513 | */ |
49b17004 | 514 | static void encode_priv(struct xdr_stream *xdr, const struct nsm_args *argp) |
0490a54a | 515 | { |
03eb1dcb CL |
516 | __be32 *p; |
517 | ||
518 | p = xdr_reserve_space(xdr, SM_PRIV_SIZE); | |
cab2d3c9 | 519 | xdr_encode_opaque_fixed(p, argp->priv->data, SM_PRIV_SIZE); |
0490a54a CL |
520 | } |
521 | ||
9f06c719 CL |
522 | static void nsm_xdr_enc_mon(struct rpc_rqst *req, struct xdr_stream *xdr, |
523 | const struct nsm_args *argp) | |
1da177e4 | 524 | { |
9f06c719 CL |
525 | encode_mon_id(xdr, argp); |
526 | encode_priv(xdr, argp); | |
1da177e4 LT |
527 | } |
528 | ||
9f06c719 CL |
529 | static void nsm_xdr_enc_unmon(struct rpc_rqst *req, struct xdr_stream *xdr, |
530 | const struct nsm_args *argp) | |
1da177e4 | 531 | { |
9f06c719 | 532 | encode_mon_id(xdr, argp); |
1da177e4 LT |
533 | } |
534 | ||
bf269551 CL |
535 | static int nsm_xdr_dec_stat_res(struct rpc_rqst *rqstp, |
536 | struct xdr_stream *xdr, | |
537 | struct nsm_res *resp) | |
1da177e4 | 538 | { |
bf269551 | 539 | __be32 *p; |
03eb1dcb | 540 | |
bf269551 | 541 | p = xdr_inline_decode(xdr, 4 + 4); |
03eb1dcb CL |
542 | if (unlikely(p == NULL)) |
543 | return -EIO; | |
49b17004 CL |
544 | resp->status = be32_to_cpup(p++); |
545 | resp->state = be32_to_cpup(p); | |
03eb1dcb | 546 | |
bf269551 CL |
547 | dprintk("lockd: %s status %d state %d\n", |
548 | __func__, resp->status, resp->state); | |
1da177e4 LT |
549 | return 0; |
550 | } | |
551 | ||
bf269551 CL |
552 | static int nsm_xdr_dec_stat(struct rpc_rqst *rqstp, |
553 | struct xdr_stream *xdr, | |
554 | struct nsm_res *resp) | |
1da177e4 | 555 | { |
bf269551 | 556 | __be32 *p; |
03eb1dcb | 557 | |
bf269551 | 558 | p = xdr_inline_decode(xdr, 4); |
03eb1dcb CL |
559 | if (unlikely(p == NULL)) |
560 | return -EIO; | |
49b17004 | 561 | resp->state = be32_to_cpup(p); |
03eb1dcb | 562 | |
bf269551 | 563 | dprintk("lockd: %s state %d\n", __func__, resp->state); |
1da177e4 LT |
564 | return 0; |
565 | } | |
566 | ||
567 | #define SM_my_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN)) | |
2ca7754d CL |
568 | #define SM_my_id_sz (SM_my_name_sz+3) |
569 | #define SM_mon_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN)) | |
570 | #define SM_mon_id_sz (SM_mon_name_sz+SM_my_id_sz) | |
0490a54a CL |
571 | #define SM_priv_sz (XDR_QUADLEN(SM_PRIV_SIZE)) |
572 | #define SM_mon_sz (SM_mon_id_sz+SM_priv_sz) | |
1da177e4 LT |
573 | #define SM_monres_sz 2 |
574 | #define SM_unmonres_sz 1 | |
575 | ||
1da177e4 | 576 | static struct rpc_procinfo nsm_procedures[] = { |
36e8e668 CL |
577 | [NSMPROC_MON] = { |
578 | .p_proc = NSMPROC_MON, | |
9f06c719 | 579 | .p_encode = (kxdreproc_t)nsm_xdr_enc_mon, |
bf269551 | 580 | .p_decode = (kxdrdproc_t)nsm_xdr_dec_stat_res, |
2bea90d4 CL |
581 | .p_arglen = SM_mon_sz, |
582 | .p_replen = SM_monres_sz, | |
36e8e668 | 583 | .p_statidx = NSMPROC_MON, |
cc0175c1 | 584 | .p_name = "MONITOR", |
1da177e4 | 585 | }, |
36e8e668 CL |
586 | [NSMPROC_UNMON] = { |
587 | .p_proc = NSMPROC_UNMON, | |
9f06c719 | 588 | .p_encode = (kxdreproc_t)nsm_xdr_enc_unmon, |
bf269551 | 589 | .p_decode = (kxdrdproc_t)nsm_xdr_dec_stat, |
2bea90d4 CL |
590 | .p_arglen = SM_mon_id_sz, |
591 | .p_replen = SM_unmonres_sz, | |
36e8e668 | 592 | .p_statidx = NSMPROC_UNMON, |
cc0175c1 | 593 | .p_name = "UNMONITOR", |
1da177e4 LT |
594 | }, |
595 | }; | |
596 | ||
a613fa16 | 597 | static const struct rpc_version nsm_version1 = { |
e8c96f8c TK |
598 | .number = 1, |
599 | .nrprocs = ARRAY_SIZE(nsm_procedures), | |
1da177e4 LT |
600 | .procs = nsm_procedures |
601 | }; | |
602 | ||
a613fa16 | 603 | static const struct rpc_version *nsm_version[] = { |
1da177e4 LT |
604 | [1] = &nsm_version1, |
605 | }; | |
606 | ||
607 | static struct rpc_stat nsm_stats; | |
608 | ||
a613fa16 | 609 | static const struct rpc_program nsm_program = { |
1da177e4 | 610 | .name = "statd", |
36e8e668 | 611 | .number = NSM_PROGRAM, |
e8c96f8c | 612 | .nrvers = ARRAY_SIZE(nsm_version), |
1da177e4 LT |
613 | .version = nsm_version, |
614 | .stats = &nsm_stats | |
615 | }; |