Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * linux/fs/lockd/mon.c | |
4 | * | |
5 | * The kernel statd client. | |
6 | * | |
7 | * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de> | |
8 | */ | |
9 | ||
10 | #include <linux/types.h> | |
1da177e4 | 11 | #include <linux/kernel.h> |
94da7663 | 12 | #include <linux/ktime.h> |
5a0e3ad6 | 13 | #include <linux/slab.h> |
94da7663 | 14 | |
1da177e4 | 15 | #include <linux/sunrpc/clnt.h> |
5976687a | 16 | #include <linux/sunrpc/addr.h> |
0896a725 | 17 | #include <linux/sunrpc/xprtsock.h> |
1da177e4 LT |
18 | #include <linux/sunrpc/svc.h> |
19 | #include <linux/lockd/lockd.h> | |
1da177e4 | 20 | |
ad5b365c MR |
21 | #include <asm/unaligned.h> |
22 | ||
e9406db2 SK |
23 | #include "netns.h" |
24 | ||
1da177e4 | 25 | #define NLMDBG_FACILITY NLMDBG_MONITOR |
36e8e668 CL |
26 | #define NSM_PROGRAM 100024 |
27 | #define NSM_VERSION 1 | |
28 | ||
29 | enum { | |
30 | NSMPROC_NULL, | |
31 | NSMPROC_STAT, | |
32 | NSMPROC_MON, | |
33 | NSMPROC_UNMON, | |
34 | NSMPROC_UNMON_ALL, | |
35 | NSMPROC_SIMU_CRASH, | |
36 | NSMPROC_NOTIFY, | |
37 | }; | |
1da177e4 | 38 | |
9c1bfd03 | 39 | struct nsm_args { |
cab2d3c9 | 40 | struct nsm_private *priv; |
9c1bfd03 CL |
41 | u32 prog; /* RPC callback info */ |
42 | u32 vers; | |
43 | u32 proc; | |
44 | ||
45 | char *mon_name; | |
0d0f4aab | 46 | const char *nodename; |
9c1bfd03 CL |
47 | }; |
48 | ||
49 | struct nsm_res { | |
50 | u32 status; | |
51 | u32 state; | |
52 | }; | |
53 | ||
a613fa16 | 54 | static const struct rpc_program nsm_program; |
67c6d107 | 55 | static DEFINE_SPINLOCK(nsm_lock); |
1da177e4 LT |
56 | |
57 | /* | |
58 | * Local NSM state | |
59 | */ | |
6c9dc425 | 60 | u32 __read_mostly nsm_local_state; |
90ab5ee9 | 61 | bool __read_mostly nsm_use_hostnames; |
1da177e4 | 62 | |
8529bc51 CL |
63 | static inline struct sockaddr *nsm_addr(const struct nsm_handle *nsm) |
64 | { | |
65 | return (struct sockaddr *)&nsm->sm_addr; | |
66 | } | |
67 | ||
03a9a42a | 68 | static struct rpc_clnt *nsm_create(struct net *net, const char *nodename) |
49b5699b CL |
69 | { |
70 | struct sockaddr_in sin = { | |
71 | .sin_family = AF_INET, | |
72 | .sin_addr.s_addr = htonl(INADDR_LOOPBACK), | |
73 | }; | |
74 | struct rpc_create_args args = { | |
0e1cb5c0 | 75 | .net = net, |
e9406db2 | 76 | .protocol = XPRT_TRANSPORT_TCP, |
49b5699b CL |
77 | .address = (struct sockaddr *)&sin, |
78 | .addrsize = sizeof(sin), | |
79 | .servername = "rpc.statd", | |
03a9a42a | 80 | .nodename = nodename, |
49b5699b CL |
81 | .program = &nsm_program, |
82 | .version = NSM_VERSION, | |
83 | .authflavor = RPC_AUTH_NULL, | |
0e5c2632 | 84 | .flags = RPC_CLNT_CREATE_NOPING, |
79caa5fa | 85 | .cred = current_cred(), |
49b5699b CL |
86 | }; |
87 | ||
88 | return rpc_create(&args); | |
89 | } | |
90 | ||
0e1cb5c0 | 91 | static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res, |
0d0f4aab | 92 | const struct nlm_host *host) |
1da177e4 | 93 | { |
1da177e4 | 94 | int status; |
0d0f4aab | 95 | struct rpc_clnt *clnt; |
a4846750 | 96 | struct nsm_args args = { |
cab2d3c9 | 97 | .priv = &nsm->sm_priv, |
a4846750 CL |
98 | .prog = NLM_PROGRAM, |
99 | .vers = 3, | |
100 | .proc = NLMPROC_NSM_NOTIFY, | |
29ed1407 | 101 | .mon_name = nsm->sm_mon_name, |
0d0f4aab | 102 | .nodename = host->nodename, |
a4846750 | 103 | }; |
dead28da CL |
104 | struct rpc_message msg = { |
105 | .rpc_argp = &args, | |
106 | .rpc_resp = res, | |
107 | }; | |
1da177e4 | 108 | |
1da177e4 LT |
109 | memset(res, 0, sizeof(*res)); |
110 | ||
0d0f4aab AR |
111 | clnt = nsm_create(host->net, host->nodename); |
112 | if (IS_ERR(clnt)) { | |
113 | dprintk("lockd: failed to create NSM upcall transport, " | |
e919b076 VA |
114 | "status=%ld, net=%x\n", PTR_ERR(clnt), |
115 | host->net->ns.inum); | |
0d0f4aab AR |
116 | return PTR_ERR(clnt); |
117 | } | |
118 | ||
dead28da | 119 | msg.rpc_proc = &clnt->cl_procinfo[proc]; |
e9406db2 | 120 | status = rpc_call_sync(clnt, &msg, RPC_TASK_SOFTCONN); |
173b3afc BC |
121 | if (status == -ECONNREFUSED) { |
122 | dprintk("lockd: NSM upcall RPC failed, status=%d, forcing rebind\n", | |
123 | status); | |
124 | rpc_force_rebind(clnt); | |
125 | status = rpc_call_sync(clnt, &msg, RPC_TASK_SOFTCONN); | |
126 | } | |
1da177e4 | 127 | if (status < 0) |
5acf4315 CL |
128 | dprintk("lockd: NSM upcall RPC failed, status=%d\n", |
129 | status); | |
1da177e4 LT |
130 | else |
131 | status = 0; | |
0d0f4aab AR |
132 | |
133 | rpc_shutdown_client(clnt); | |
1da177e4 LT |
134 | return status; |
135 | } | |
136 | ||
1e49323c CL |
137 | /** |
138 | * nsm_monitor - Notify a peer in case we reboot | |
139 | * @host: pointer to nlm_host of peer to notify | |
140 | * | |
141 | * If this peer is not already monitored, this function sends an | |
142 | * upcall to the local rpc.statd to record the name/address of | |
143 | * the peer to notify in case we reboot. | |
144 | * | |
145 | * Returns zero if the peer is monitored by the local rpc.statd; | |
146 | * otherwise a negative errno value is returned. | |
1da177e4 | 147 | */ |
1e49323c | 148 | int nsm_monitor(const struct nlm_host *host) |
1da177e4 | 149 | { |
8dead0db | 150 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 LT |
151 | struct nsm_res res; |
152 | int status; | |
153 | ||
9fee4902 | 154 | dprintk("lockd: nsm_monitor(%s)\n", nsm->sm_name); |
8dead0db OK |
155 | |
156 | if (nsm->sm_monitored) | |
977faf39 | 157 | return 0; |
1da177e4 | 158 | |
29ed1407 CL |
159 | /* |
160 | * Choose whether to record the caller_name or IP address of | |
161 | * this peer in the local rpc.statd's database. | |
162 | */ | |
163 | nsm->sm_mon_name = nsm_use_hostnames ? nsm->sm_name : nsm->sm_addrbuf; | |
164 | ||
0d0f4aab | 165 | status = nsm_mon_unmon(nsm, NSMPROC_MON, &res, host); |
6c9dc425 | 166 | if (unlikely(res.status != 0)) |
5d254b11 | 167 | status = -EIO; |
6c9dc425 | 168 | if (unlikely(status < 0)) { |
9af94fc4 | 169 | pr_notice_ratelimited("lockd: cannot monitor %s\n", nsm->sm_name); |
6c9dc425 CL |
170 | return status; |
171 | } | |
172 | ||
173 | nsm->sm_monitored = 1; | |
174 | if (unlikely(nsm_local_state != res.state)) { | |
175 | nsm_local_state = res.state; | |
176 | dprintk("lockd: NSM state changed to %d\n", nsm_local_state); | |
177 | } | |
178 | return 0; | |
1da177e4 LT |
179 | } |
180 | ||
356c3eb4 CL |
181 | /** |
182 | * nsm_unmonitor - Unregister peer notification | |
183 | * @host: pointer to nlm_host of peer to stop monitoring | |
184 | * | |
185 | * If this peer is monitored, this function sends an upcall to | |
186 | * tell the local rpc.statd not to send this peer a notification | |
187 | * when we reboot. | |
1da177e4 | 188 | */ |
356c3eb4 | 189 | void nsm_unmonitor(const struct nlm_host *host) |
1da177e4 | 190 | { |
8dead0db | 191 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 | 192 | struct nsm_res res; |
356c3eb4 | 193 | int status; |
1da177e4 | 194 | |
c751082c | 195 | if (refcount_read(&nsm->sm_count) == 1 |
9502c522 | 196 | && nsm->sm_monitored && !nsm->sm_sticky) { |
9fee4902 | 197 | dprintk("lockd: nsm_unmonitor(%s)\n", nsm->sm_name); |
9502c522 | 198 | |
0d0f4aab | 199 | status = nsm_mon_unmon(nsm, NSMPROC_UNMON, &res, host); |
0c7aef45 CL |
200 | if (res.status != 0) |
201 | status = -EIO; | |
977faf39 | 202 | if (status < 0) |
9502c522 | 203 | printk(KERN_NOTICE "lockd: cannot unmonitor %s\n", |
9fee4902 | 204 | nsm->sm_name); |
9502c522 OK |
205 | else |
206 | nsm->sm_monitored = 0; | |
977faf39 | 207 | } |
1da177e4 LT |
208 | } |
209 | ||
0ad95472 AR |
210 | static struct nsm_handle *nsm_lookup_hostname(const struct list_head *nsm_handles, |
211 | const char *hostname, const size_t len) | |
3420a8c4 CL |
212 | { |
213 | struct nsm_handle *nsm; | |
214 | ||
0ad95472 | 215 | list_for_each_entry(nsm, nsm_handles, sm_link) |
3420a8c4 CL |
216 | if (strlen(nsm->sm_name) == len && |
217 | memcmp(nsm->sm_name, hostname, len) == 0) | |
218 | return nsm; | |
219 | return NULL; | |
220 | } | |
221 | ||
0ad95472 AR |
222 | static struct nsm_handle *nsm_lookup_addr(const struct list_head *nsm_handles, |
223 | const struct sockaddr *sap) | |
77a3ef33 CL |
224 | { |
225 | struct nsm_handle *nsm; | |
226 | ||
0ad95472 | 227 | list_for_each_entry(nsm, nsm_handles, sm_link) |
4516fc04 | 228 | if (rpc_cmp_addr(nsm_addr(nsm), sap)) |
77a3ef33 CL |
229 | return nsm; |
230 | return NULL; | |
231 | } | |
232 | ||
0ad95472 AR |
233 | static struct nsm_handle *nsm_lookup_priv(const struct list_head *nsm_handles, |
234 | const struct nsm_private *priv) | |
3420a8c4 CL |
235 | { |
236 | struct nsm_handle *nsm; | |
237 | ||
0ad95472 | 238 | list_for_each_entry(nsm, nsm_handles, sm_link) |
3420a8c4 CL |
239 | if (memcmp(nsm->sm_priv.data, priv->data, |
240 | sizeof(priv->data)) == 0) | |
241 | return nsm; | |
242 | return NULL; | |
243 | } | |
244 | ||
7e44d3be CL |
245 | /* |
246 | * Construct a unique cookie to match this nsm_handle to this monitored | |
247 | * host. It is passed to the local rpc.statd via NSMPROC_MON, and | |
248 | * returned via NLMPROC_SM_NOTIFY, in the "priv" field of these | |
249 | * requests. | |
250 | * | |
94da7663 CL |
251 | * The NSM protocol requires that these cookies be unique while the |
252 | * system is running. We prefer a stronger requirement of making them | |
253 | * unique across reboots. If user space bugs cause a stale cookie to | |
254 | * be sent to the kernel, it could cause the wrong host to lose its | |
255 | * lock state if cookies were not unique across reboots. | |
256 | * | |
257 | * The cookies are exposed only to local user space via loopback. They | |
258 | * do not appear on the physical network. If we want greater security | |
259 | * for some reason, nsm_init_private() could perform a one-way hash to | |
260 | * obscure the contents of the cookie. | |
7e44d3be CL |
261 | */ |
262 | static void nsm_init_private(struct nsm_handle *nsm) | |
263 | { | |
94da7663 | 264 | u64 *p = (u64 *)&nsm->sm_priv.data; |
ad5b365c | 265 | s64 ns; |
94da7663 | 266 | |
5eaaed4f | 267 | ns = ktime_get_ns(); |
ad5b365c MR |
268 | put_unaligned(ns, p); |
269 | put_unaligned((unsigned long)nsm, p + 1); | |
7e44d3be CL |
270 | } |
271 | ||
b39b897c CL |
272 | static struct nsm_handle *nsm_create_handle(const struct sockaddr *sap, |
273 | const size_t salen, | |
274 | const char *hostname, | |
275 | const size_t hostname_len) | |
276 | { | |
277 | struct nsm_handle *new; | |
278 | ||
279 | new = kzalloc(sizeof(*new) + hostname_len + 1, GFP_KERNEL); | |
280 | if (unlikely(new == NULL)) | |
281 | return NULL; | |
282 | ||
c751082c | 283 | refcount_set(&new->sm_count, 1); |
b39b897c CL |
284 | new->sm_name = (char *)(new + 1); |
285 | memcpy(nsm_addr(new), sap, salen); | |
286 | new->sm_addrlen = salen; | |
287 | nsm_init_private(new); | |
c15128c5 CL |
288 | |
289 | if (rpc_ntop(nsm_addr(new), new->sm_addrbuf, | |
290 | sizeof(new->sm_addrbuf)) == 0) | |
291 | (void)snprintf(new->sm_addrbuf, sizeof(new->sm_addrbuf), | |
292 | "unsupported address family"); | |
b39b897c CL |
293 | memcpy(new->sm_name, hostname, hostname_len); |
294 | new->sm_name[hostname_len] = '\0'; | |
295 | ||
296 | return new; | |
297 | } | |
298 | ||
67c6d107 | 299 | /** |
92fd91b9 | 300 | * nsm_get_handle - Find or create a cached nsm_handle |
0ad95472 | 301 | * @net: network namespace |
67c6d107 CL |
302 | * @sap: pointer to socket address of handle to find |
303 | * @salen: length of socket address | |
304 | * @hostname: pointer to C string containing hostname to find | |
305 | * @hostname_len: length of C string | |
67c6d107 | 306 | * |
92fd91b9 | 307 | * Behavior is modulated by the global nsm_use_hostnames variable. |
67c6d107 | 308 | * |
92fd91b9 CL |
309 | * Returns a cached nsm_handle after bumping its ref count, or |
310 | * returns a fresh nsm_handle if a handle that matches @sap and/or | |
311 | * @hostname cannot be found in the handle cache. Returns NULL if | |
312 | * an error occurs. | |
67c6d107 | 313 | */ |
0ad95472 AR |
314 | struct nsm_handle *nsm_get_handle(const struct net *net, |
315 | const struct sockaddr *sap, | |
92fd91b9 CL |
316 | const size_t salen, const char *hostname, |
317 | const size_t hostname_len) | |
67c6d107 | 318 | { |
77a3ef33 | 319 | struct nsm_handle *cached, *new = NULL; |
0ad95472 | 320 | struct lockd_net *ln = net_generic(net, lockd_net_id); |
67c6d107 | 321 | |
67c6d107 CL |
322 | if (hostname && memchr(hostname, '/', hostname_len) != NULL) { |
323 | if (printk_ratelimit()) { | |
324 | printk(KERN_WARNING "Invalid hostname \"%.*s\" " | |
325 | "in NFS lock request\n", | |
326 | (int)hostname_len, hostname); | |
327 | } | |
328 | return NULL; | |
329 | } | |
330 | ||
331 | retry: | |
332 | spin_lock(&nsm_lock); | |
77a3ef33 CL |
333 | |
334 | if (nsm_use_hostnames && hostname != NULL) | |
0ad95472 AR |
335 | cached = nsm_lookup_hostname(&ln->nsm_handles, |
336 | hostname, hostname_len); | |
77a3ef33 | 337 | else |
0ad95472 | 338 | cached = nsm_lookup_addr(&ln->nsm_handles, sap); |
77a3ef33 CL |
339 | |
340 | if (cached != NULL) { | |
c751082c | 341 | refcount_inc(&cached->sm_count); |
77a3ef33 CL |
342 | spin_unlock(&nsm_lock); |
343 | kfree(new); | |
344 | dprintk("lockd: found nsm_handle for %s (%s), " | |
345 | "cnt %d\n", cached->sm_name, | |
346 | cached->sm_addrbuf, | |
c751082c | 347 | refcount_read(&cached->sm_count)); |
77a3ef33 | 348 | return cached; |
67c6d107 | 349 | } |
77a3ef33 CL |
350 | |
351 | if (new != NULL) { | |
0ad95472 | 352 | list_add(&new->sm_link, &ln->nsm_handles); |
77a3ef33 | 353 | spin_unlock(&nsm_lock); |
5cf1c4b1 | 354 | dprintk("lockd: created nsm_handle for %s (%s)\n", |
77a3ef33 CL |
355 | new->sm_name, new->sm_addrbuf); |
356 | return new; | |
67c6d107 | 357 | } |
77a3ef33 | 358 | |
67c6d107 CL |
359 | spin_unlock(&nsm_lock); |
360 | ||
77a3ef33 CL |
361 | new = nsm_create_handle(sap, salen, hostname, hostname_len); |
362 | if (unlikely(new == NULL)) | |
67c6d107 | 363 | return NULL; |
67c6d107 | 364 | goto retry; |
67c6d107 CL |
365 | } |
366 | ||
3420a8c4 CL |
367 | /** |
368 | * nsm_reboot_lookup - match NLMPROC_SM_NOTIFY arguments to an nsm_handle | |
0ad95472 | 369 | * @net: network namespace |
3420a8c4 CL |
370 | * @info: pointer to NLMPROC_SM_NOTIFY arguments |
371 | * | |
7e469af9 JL |
372 | * Returns a matching nsm_handle if found in the nsm cache. The returned |
373 | * nsm_handle's reference count is bumped. Otherwise returns NULL if some | |
374 | * error occurred. | |
3420a8c4 | 375 | */ |
0ad95472 AR |
376 | struct nsm_handle *nsm_reboot_lookup(const struct net *net, |
377 | const struct nlm_reboot *info) | |
3420a8c4 CL |
378 | { |
379 | struct nsm_handle *cached; | |
0ad95472 | 380 | struct lockd_net *ln = net_generic(net, lockd_net_id); |
3420a8c4 CL |
381 | |
382 | spin_lock(&nsm_lock); | |
383 | ||
0ad95472 | 384 | cached = nsm_lookup_priv(&ln->nsm_handles, &info->priv); |
3420a8c4 CL |
385 | if (unlikely(cached == NULL)) { |
386 | spin_unlock(&nsm_lock); | |
387 | dprintk("lockd: never saw rebooted peer '%.*s' before\n", | |
388 | info->len, info->mon); | |
389 | return cached; | |
390 | } | |
391 | ||
c751082c | 392 | refcount_inc(&cached->sm_count); |
3420a8c4 CL |
393 | spin_unlock(&nsm_lock); |
394 | ||
3420a8c4 CL |
395 | dprintk("lockd: host %s (%s) rebooted, cnt %d\n", |
396 | cached->sm_name, cached->sm_addrbuf, | |
c751082c | 397 | refcount_read(&cached->sm_count)); |
3420a8c4 CL |
398 | return cached; |
399 | } | |
400 | ||
67c6d107 CL |
401 | /** |
402 | * nsm_release - Release an NSM handle | |
403 | * @nsm: pointer to handle to be released | |
404 | * | |
405 | */ | |
406 | void nsm_release(struct nsm_handle *nsm) | |
407 | { | |
c751082c | 408 | if (refcount_dec_and_lock(&nsm->sm_count, &nsm_lock)) { |
67c6d107 CL |
409 | list_del(&nsm->sm_link); |
410 | spin_unlock(&nsm_lock); | |
5cf1c4b1 CL |
411 | dprintk("lockd: destroyed nsm_handle for %s (%s)\n", |
412 | nsm->sm_name, nsm->sm_addrbuf); | |
67c6d107 CL |
413 | kfree(nsm); |
414 | } | |
415 | } | |
416 | ||
1da177e4 LT |
417 | /* |
418 | * XDR functions for NSM. | |
2ca7754d CL |
419 | * |
420 | * See http://www.opengroup.org/ for details on the Network | |
421 | * Status Monitor wire protocol. | |
1da177e4 LT |
422 | */ |
423 | ||
49b17004 | 424 | static void encode_nsm_string(struct xdr_stream *xdr, const char *string) |
099bd05f | 425 | { |
03eb1dcb CL |
426 | const u32 len = strlen(string); |
427 | __be32 *p; | |
428 | ||
49b17004 | 429 | p = xdr_reserve_space(xdr, 4 + len); |
03eb1dcb | 430 | xdr_encode_opaque(p, string, len); |
099bd05f CL |
431 | } |
432 | ||
49695174 CL |
433 | /* |
434 | * "mon_name" specifies the host to be monitored. | |
49695174 | 435 | */ |
49b17004 | 436 | static void encode_mon_name(struct xdr_stream *xdr, const struct nsm_args *argp) |
49695174 | 437 | { |
49b17004 | 438 | encode_nsm_string(xdr, argp->mon_name); |
49695174 CL |
439 | } |
440 | ||
850c95fd CL |
441 | /* |
442 | * The "my_id" argument specifies the hostname and RPC procedure | |
443 | * to be called when the status manager receives notification | |
36e8e668 | 444 | * (via the NLMPROC_SM_NOTIFY call) that the state of host "mon_name" |
850c95fd CL |
445 | * has changed. |
446 | */ | |
49b17004 | 447 | static void encode_my_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
850c95fd | 448 | { |
03eb1dcb CL |
449 | __be32 *p; |
450 | ||
303a7ce9 | 451 | encode_nsm_string(xdr, argp->nodename); |
49b17004 CL |
452 | p = xdr_reserve_space(xdr, 4 + 4 + 4); |
453 | *p++ = cpu_to_be32(argp->prog); | |
454 | *p++ = cpu_to_be32(argp->vers); | |
455 | *p = cpu_to_be32(argp->proc); | |
850c95fd CL |
456 | } |
457 | ||
ea72a7f1 CL |
458 | /* |
459 | * The "mon_id" argument specifies the non-private arguments | |
36e8e668 | 460 | * of an NSMPROC_MON or NSMPROC_UNMON call. |
ea72a7f1 | 461 | */ |
49b17004 | 462 | static void encode_mon_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
ea72a7f1 | 463 | { |
49b17004 CL |
464 | encode_mon_name(xdr, argp); |
465 | encode_my_id(xdr, argp); | |
ea72a7f1 CL |
466 | } |
467 | ||
0490a54a CL |
468 | /* |
469 | * The "priv" argument may contain private information required | |
36e8e668 CL |
470 | * by the NSMPROC_MON call. This information will be supplied in the |
471 | * NLMPROC_SM_NOTIFY call. | |
0490a54a | 472 | */ |
49b17004 | 473 | static void encode_priv(struct xdr_stream *xdr, const struct nsm_args *argp) |
0490a54a | 474 | { |
03eb1dcb CL |
475 | __be32 *p; |
476 | ||
477 | p = xdr_reserve_space(xdr, SM_PRIV_SIZE); | |
cab2d3c9 | 478 | xdr_encode_opaque_fixed(p, argp->priv->data, SM_PRIV_SIZE); |
0490a54a CL |
479 | } |
480 | ||
9f06c719 | 481 | static void nsm_xdr_enc_mon(struct rpc_rqst *req, struct xdr_stream *xdr, |
bf96391e | 482 | const void *argp) |
1da177e4 | 483 | { |
9f06c719 CL |
484 | encode_mon_id(xdr, argp); |
485 | encode_priv(xdr, argp); | |
1da177e4 LT |
486 | } |
487 | ||
9f06c719 | 488 | static void nsm_xdr_enc_unmon(struct rpc_rqst *req, struct xdr_stream *xdr, |
bf96391e | 489 | const void *argp) |
1da177e4 | 490 | { |
9f06c719 | 491 | encode_mon_id(xdr, argp); |
1da177e4 LT |
492 | } |
493 | ||
bf269551 CL |
494 | static int nsm_xdr_dec_stat_res(struct rpc_rqst *rqstp, |
495 | struct xdr_stream *xdr, | |
1fa23391 | 496 | void *data) |
1da177e4 | 497 | { |
1fa23391 | 498 | struct nsm_res *resp = data; |
bf269551 | 499 | __be32 *p; |
03eb1dcb | 500 | |
bf269551 | 501 | p = xdr_inline_decode(xdr, 4 + 4); |
03eb1dcb CL |
502 | if (unlikely(p == NULL)) |
503 | return -EIO; | |
49b17004 CL |
504 | resp->status = be32_to_cpup(p++); |
505 | resp->state = be32_to_cpup(p); | |
03eb1dcb | 506 | |
bf269551 CL |
507 | dprintk("lockd: %s status %d state %d\n", |
508 | __func__, resp->status, resp->state); | |
1da177e4 LT |
509 | return 0; |
510 | } | |
511 | ||
bf269551 CL |
512 | static int nsm_xdr_dec_stat(struct rpc_rqst *rqstp, |
513 | struct xdr_stream *xdr, | |
1fa23391 | 514 | void *data) |
1da177e4 | 515 | { |
1fa23391 | 516 | struct nsm_res *resp = data; |
bf269551 | 517 | __be32 *p; |
03eb1dcb | 518 | |
bf269551 | 519 | p = xdr_inline_decode(xdr, 4); |
03eb1dcb CL |
520 | if (unlikely(p == NULL)) |
521 | return -EIO; | |
49b17004 | 522 | resp->state = be32_to_cpup(p); |
03eb1dcb | 523 | |
bf269551 | 524 | dprintk("lockd: %s state %d\n", __func__, resp->state); |
1da177e4 LT |
525 | return 0; |
526 | } | |
527 | ||
528 | #define SM_my_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN)) | |
2ca7754d CL |
529 | #define SM_my_id_sz (SM_my_name_sz+3) |
530 | #define SM_mon_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN)) | |
531 | #define SM_mon_id_sz (SM_mon_name_sz+SM_my_id_sz) | |
0490a54a CL |
532 | #define SM_priv_sz (XDR_QUADLEN(SM_PRIV_SIZE)) |
533 | #define SM_mon_sz (SM_mon_id_sz+SM_priv_sz) | |
1da177e4 LT |
534 | #define SM_monres_sz 2 |
535 | #define SM_unmonres_sz 1 | |
536 | ||
499b4988 | 537 | static const struct rpc_procinfo nsm_procedures[] = { |
36e8e668 CL |
538 | [NSMPROC_MON] = { |
539 | .p_proc = NSMPROC_MON, | |
bf96391e | 540 | .p_encode = nsm_xdr_enc_mon, |
1fa23391 | 541 | .p_decode = nsm_xdr_dec_stat_res, |
2bea90d4 CL |
542 | .p_arglen = SM_mon_sz, |
543 | .p_replen = SM_monres_sz, | |
36e8e668 | 544 | .p_statidx = NSMPROC_MON, |
cc0175c1 | 545 | .p_name = "MONITOR", |
1da177e4 | 546 | }, |
36e8e668 CL |
547 | [NSMPROC_UNMON] = { |
548 | .p_proc = NSMPROC_UNMON, | |
bf96391e | 549 | .p_encode = nsm_xdr_enc_unmon, |
1fa23391 | 550 | .p_decode = nsm_xdr_dec_stat, |
2bea90d4 CL |
551 | .p_arglen = SM_mon_id_sz, |
552 | .p_replen = SM_unmonres_sz, | |
36e8e668 | 553 | .p_statidx = NSMPROC_UNMON, |
cc0175c1 | 554 | .p_name = "UNMONITOR", |
1da177e4 LT |
555 | }, |
556 | }; | |
557 | ||
1c5876dd | 558 | static unsigned int nsm_version1_counts[ARRAY_SIZE(nsm_procedures)]; |
a613fa16 | 559 | static const struct rpc_version nsm_version1 = { |
cdfa31e9 CH |
560 | .number = 1, |
561 | .nrprocs = ARRAY_SIZE(nsm_procedures), | |
1c5876dd CH |
562 | .procs = nsm_procedures, |
563 | .counts = nsm_version1_counts, | |
1da177e4 LT |
564 | }; |
565 | ||
a613fa16 | 566 | static const struct rpc_version *nsm_version[] = { |
1da177e4 LT |
567 | [1] = &nsm_version1, |
568 | }; | |
569 | ||
570 | static struct rpc_stat nsm_stats; | |
571 | ||
a613fa16 | 572 | static const struct rpc_program nsm_program = { |
cdfa31e9 CH |
573 | .name = "statd", |
574 | .number = NSM_PROGRAM, | |
575 | .nrvers = ARRAY_SIZE(nsm_version), | |
576 | .version = nsm_version, | |
577 | .stats = &nsm_stats | |
1da177e4 | 578 | }; |