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> |
5976687a | 15 | #include <linux/sunrpc/addr.h> |
0896a725 | 16 | #include <linux/sunrpc/xprtsock.h> |
1da177e4 LT |
17 | #include <linux/sunrpc/svc.h> |
18 | #include <linux/lockd/lockd.h> | |
1da177e4 | 19 | |
ad5b365c MR |
20 | #include <asm/unaligned.h> |
21 | ||
e9406db2 SK |
22 | #include "netns.h" |
23 | ||
1da177e4 | 24 | #define NLMDBG_FACILITY NLMDBG_MONITOR |
36e8e668 CL |
25 | #define NSM_PROGRAM 100024 |
26 | #define NSM_VERSION 1 | |
27 | ||
28 | enum { | |
29 | NSMPROC_NULL, | |
30 | NSMPROC_STAT, | |
31 | NSMPROC_MON, | |
32 | NSMPROC_UNMON, | |
33 | NSMPROC_UNMON_ALL, | |
34 | NSMPROC_SIMU_CRASH, | |
35 | NSMPROC_NOTIFY, | |
36 | }; | |
1da177e4 | 37 | |
9c1bfd03 | 38 | struct nsm_args { |
cab2d3c9 | 39 | struct nsm_private *priv; |
9c1bfd03 CL |
40 | u32 prog; /* RPC callback info */ |
41 | u32 vers; | |
42 | u32 proc; | |
43 | ||
44 | char *mon_name; | |
0d0f4aab | 45 | const char *nodename; |
9c1bfd03 CL |
46 | }; |
47 | ||
48 | struct nsm_res { | |
49 | u32 status; | |
50 | u32 state; | |
51 | }; | |
52 | ||
a613fa16 | 53 | static const struct rpc_program nsm_program; |
67c6d107 | 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 | ||
03a9a42a | 67 | static struct rpc_clnt *nsm_create(struct net *net, const char *nodename) |
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", | |
03a9a42a | 79 | .nodename = nodename, |
49b5699b CL |
80 | .program = &nsm_program, |
81 | .version = NSM_VERSION, | |
82 | .authflavor = RPC_AUTH_NULL, | |
0e5c2632 | 83 | .flags = RPC_CLNT_CREATE_NOPING, |
49b5699b CL |
84 | }; |
85 | ||
86 | return rpc_create(&args); | |
87 | } | |
88 | ||
0e1cb5c0 | 89 | static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res, |
0d0f4aab | 90 | const struct nlm_host *host) |
1da177e4 | 91 | { |
1da177e4 | 92 | int status; |
0d0f4aab | 93 | struct rpc_clnt *clnt; |
a4846750 | 94 | struct nsm_args args = { |
cab2d3c9 | 95 | .priv = &nsm->sm_priv, |
a4846750 CL |
96 | .prog = NLM_PROGRAM, |
97 | .vers = 3, | |
98 | .proc = NLMPROC_NSM_NOTIFY, | |
29ed1407 | 99 | .mon_name = nsm->sm_mon_name, |
0d0f4aab | 100 | .nodename = host->nodename, |
a4846750 | 101 | }; |
dead28da CL |
102 | struct rpc_message msg = { |
103 | .rpc_argp = &args, | |
104 | .rpc_resp = res, | |
105 | }; | |
1da177e4 | 106 | |
1da177e4 LT |
107 | memset(res, 0, sizeof(*res)); |
108 | ||
0d0f4aab AR |
109 | clnt = nsm_create(host->net, host->nodename); |
110 | if (IS_ERR(clnt)) { | |
111 | dprintk("lockd: failed to create NSM upcall transport, " | |
112 | "status=%ld, net=%p\n", PTR_ERR(clnt), host->net); | |
113 | return PTR_ERR(clnt); | |
114 | } | |
115 | ||
dead28da | 116 | msg.rpc_proc = &clnt->cl_procinfo[proc]; |
e9406db2 | 117 | status = rpc_call_sync(clnt, &msg, RPC_TASK_SOFTCONN); |
173b3afc BC |
118 | if (status == -ECONNREFUSED) { |
119 | dprintk("lockd: NSM upcall RPC failed, status=%d, forcing rebind\n", | |
120 | status); | |
121 | rpc_force_rebind(clnt); | |
122 | status = rpc_call_sync(clnt, &msg, RPC_TASK_SOFTCONN); | |
123 | } | |
1da177e4 | 124 | if (status < 0) |
5acf4315 CL |
125 | dprintk("lockd: NSM upcall RPC failed, status=%d\n", |
126 | status); | |
1da177e4 LT |
127 | else |
128 | status = 0; | |
0d0f4aab AR |
129 | |
130 | rpc_shutdown_client(clnt); | |
1da177e4 LT |
131 | return status; |
132 | } | |
133 | ||
1e49323c CL |
134 | /** |
135 | * nsm_monitor - Notify a peer in case we reboot | |
136 | * @host: pointer to nlm_host of peer to notify | |
137 | * | |
138 | * If this peer is not already monitored, this function sends an | |
139 | * upcall to the local rpc.statd to record the name/address of | |
140 | * the peer to notify in case we reboot. | |
141 | * | |
142 | * Returns zero if the peer is monitored by the local rpc.statd; | |
143 | * otherwise a negative errno value is returned. | |
1da177e4 | 144 | */ |
1e49323c | 145 | int nsm_monitor(const struct nlm_host *host) |
1da177e4 | 146 | { |
8dead0db | 147 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 LT |
148 | struct nsm_res res; |
149 | int status; | |
150 | ||
9fee4902 | 151 | dprintk("lockd: nsm_monitor(%s)\n", nsm->sm_name); |
8dead0db OK |
152 | |
153 | if (nsm->sm_monitored) | |
977faf39 | 154 | return 0; |
1da177e4 | 155 | |
29ed1407 CL |
156 | /* |
157 | * Choose whether to record the caller_name or IP address of | |
158 | * this peer in the local rpc.statd's database. | |
159 | */ | |
160 | nsm->sm_mon_name = nsm_use_hostnames ? nsm->sm_name : nsm->sm_addrbuf; | |
161 | ||
0d0f4aab | 162 | status = nsm_mon_unmon(nsm, NSMPROC_MON, &res, host); |
6c9dc425 | 163 | if (unlikely(res.status != 0)) |
5d254b11 | 164 | status = -EIO; |
6c9dc425 | 165 | if (unlikely(status < 0)) { |
9af94fc4 | 166 | pr_notice_ratelimited("lockd: cannot monitor %s\n", nsm->sm_name); |
6c9dc425 CL |
167 | return status; |
168 | } | |
169 | ||
170 | nsm->sm_monitored = 1; | |
171 | if (unlikely(nsm_local_state != res.state)) { | |
172 | nsm_local_state = res.state; | |
173 | dprintk("lockd: NSM state changed to %d\n", nsm_local_state); | |
174 | } | |
175 | return 0; | |
1da177e4 LT |
176 | } |
177 | ||
356c3eb4 CL |
178 | /** |
179 | * nsm_unmonitor - Unregister peer notification | |
180 | * @host: pointer to nlm_host of peer to stop monitoring | |
181 | * | |
182 | * If this peer is monitored, this function sends an upcall to | |
183 | * tell the local rpc.statd not to send this peer a notification | |
184 | * when we reboot. | |
1da177e4 | 185 | */ |
356c3eb4 | 186 | void nsm_unmonitor(const struct nlm_host *host) |
1da177e4 | 187 | { |
8dead0db | 188 | struct nsm_handle *nsm = host->h_nsmhandle; |
1da177e4 | 189 | struct nsm_res res; |
356c3eb4 | 190 | int status; |
1da177e4 | 191 | |
9502c522 OK |
192 | if (atomic_read(&nsm->sm_count) == 1 |
193 | && nsm->sm_monitored && !nsm->sm_sticky) { | |
9fee4902 | 194 | dprintk("lockd: nsm_unmonitor(%s)\n", nsm->sm_name); |
9502c522 | 195 | |
0d0f4aab | 196 | status = nsm_mon_unmon(nsm, NSMPROC_UNMON, &res, host); |
0c7aef45 CL |
197 | if (res.status != 0) |
198 | status = -EIO; | |
977faf39 | 199 | if (status < 0) |
9502c522 | 200 | printk(KERN_NOTICE "lockd: cannot unmonitor %s\n", |
9fee4902 | 201 | nsm->sm_name); |
9502c522 OK |
202 | else |
203 | nsm->sm_monitored = 0; | |
977faf39 | 204 | } |
1da177e4 LT |
205 | } |
206 | ||
0ad95472 AR |
207 | static struct nsm_handle *nsm_lookup_hostname(const struct list_head *nsm_handles, |
208 | const char *hostname, const size_t len) | |
3420a8c4 CL |
209 | { |
210 | struct nsm_handle *nsm; | |
211 | ||
0ad95472 | 212 | list_for_each_entry(nsm, nsm_handles, sm_link) |
3420a8c4 CL |
213 | if (strlen(nsm->sm_name) == len && |
214 | memcmp(nsm->sm_name, hostname, len) == 0) | |
215 | return nsm; | |
216 | return NULL; | |
217 | } | |
218 | ||
0ad95472 AR |
219 | static struct nsm_handle *nsm_lookup_addr(const struct list_head *nsm_handles, |
220 | const struct sockaddr *sap) | |
77a3ef33 CL |
221 | { |
222 | struct nsm_handle *nsm; | |
223 | ||
0ad95472 | 224 | list_for_each_entry(nsm, nsm_handles, sm_link) |
4516fc04 | 225 | if (rpc_cmp_addr(nsm_addr(nsm), sap)) |
77a3ef33 CL |
226 | return nsm; |
227 | return NULL; | |
228 | } | |
229 | ||
0ad95472 AR |
230 | static struct nsm_handle *nsm_lookup_priv(const struct list_head *nsm_handles, |
231 | const struct nsm_private *priv) | |
3420a8c4 CL |
232 | { |
233 | struct nsm_handle *nsm; | |
234 | ||
0ad95472 | 235 | list_for_each_entry(nsm, nsm_handles, sm_link) |
3420a8c4 CL |
236 | if (memcmp(nsm->sm_priv.data, priv->data, |
237 | sizeof(priv->data)) == 0) | |
238 | return nsm; | |
239 | return NULL; | |
240 | } | |
241 | ||
7e44d3be CL |
242 | /* |
243 | * Construct a unique cookie to match this nsm_handle to this monitored | |
244 | * host. It is passed to the local rpc.statd via NSMPROC_MON, and | |
245 | * returned via NLMPROC_SM_NOTIFY, in the "priv" field of these | |
246 | * requests. | |
247 | * | |
94da7663 CL |
248 | * The NSM protocol requires that these cookies be unique while the |
249 | * system is running. We prefer a stronger requirement of making them | |
250 | * unique across reboots. If user space bugs cause a stale cookie to | |
251 | * be sent to the kernel, it could cause the wrong host to lose its | |
252 | * lock state if cookies were not unique across reboots. | |
253 | * | |
254 | * The cookies are exposed only to local user space via loopback. They | |
255 | * do not appear on the physical network. If we want greater security | |
256 | * for some reason, nsm_init_private() could perform a one-way hash to | |
257 | * obscure the contents of the cookie. | |
7e44d3be CL |
258 | */ |
259 | static void nsm_init_private(struct nsm_handle *nsm) | |
260 | { | |
94da7663 | 261 | u64 *p = (u64 *)&nsm->sm_priv.data; |
ad5b365c | 262 | s64 ns; |
94da7663 | 263 | |
5eaaed4f | 264 | ns = ktime_get_ns(); |
ad5b365c MR |
265 | put_unaligned(ns, p); |
266 | put_unaligned((unsigned long)nsm, p + 1); | |
7e44d3be CL |
267 | } |
268 | ||
b39b897c CL |
269 | static struct nsm_handle *nsm_create_handle(const struct sockaddr *sap, |
270 | const size_t salen, | |
271 | const char *hostname, | |
272 | const size_t hostname_len) | |
273 | { | |
274 | struct nsm_handle *new; | |
275 | ||
276 | new = kzalloc(sizeof(*new) + hostname_len + 1, GFP_KERNEL); | |
277 | if (unlikely(new == NULL)) | |
278 | return NULL; | |
279 | ||
280 | atomic_set(&new->sm_count, 1); | |
281 | new->sm_name = (char *)(new + 1); | |
282 | memcpy(nsm_addr(new), sap, salen); | |
283 | new->sm_addrlen = salen; | |
284 | nsm_init_private(new); | |
c15128c5 CL |
285 | |
286 | if (rpc_ntop(nsm_addr(new), new->sm_addrbuf, | |
287 | sizeof(new->sm_addrbuf)) == 0) | |
288 | (void)snprintf(new->sm_addrbuf, sizeof(new->sm_addrbuf), | |
289 | "unsupported address family"); | |
b39b897c CL |
290 | memcpy(new->sm_name, hostname, hostname_len); |
291 | new->sm_name[hostname_len] = '\0'; | |
292 | ||
293 | return new; | |
294 | } | |
295 | ||
67c6d107 | 296 | /** |
92fd91b9 | 297 | * nsm_get_handle - Find or create a cached nsm_handle |
0ad95472 | 298 | * @net: network namespace |
67c6d107 CL |
299 | * @sap: pointer to socket address of handle to find |
300 | * @salen: length of socket address | |
301 | * @hostname: pointer to C string containing hostname to find | |
302 | * @hostname_len: length of C string | |
67c6d107 | 303 | * |
92fd91b9 | 304 | * Behavior is modulated by the global nsm_use_hostnames variable. |
67c6d107 | 305 | * |
92fd91b9 CL |
306 | * Returns a cached nsm_handle after bumping its ref count, or |
307 | * returns a fresh nsm_handle if a handle that matches @sap and/or | |
308 | * @hostname cannot be found in the handle cache. Returns NULL if | |
309 | * an error occurs. | |
67c6d107 | 310 | */ |
0ad95472 AR |
311 | struct nsm_handle *nsm_get_handle(const struct net *net, |
312 | const struct sockaddr *sap, | |
92fd91b9 CL |
313 | const size_t salen, const char *hostname, |
314 | const size_t hostname_len) | |
67c6d107 | 315 | { |
77a3ef33 | 316 | struct nsm_handle *cached, *new = NULL; |
0ad95472 | 317 | struct lockd_net *ln = net_generic(net, lockd_net_id); |
67c6d107 | 318 | |
67c6d107 CL |
319 | if (hostname && memchr(hostname, '/', hostname_len) != NULL) { |
320 | if (printk_ratelimit()) { | |
321 | printk(KERN_WARNING "Invalid hostname \"%.*s\" " | |
322 | "in NFS lock request\n", | |
323 | (int)hostname_len, hostname); | |
324 | } | |
325 | return NULL; | |
326 | } | |
327 | ||
328 | retry: | |
329 | spin_lock(&nsm_lock); | |
77a3ef33 CL |
330 | |
331 | if (nsm_use_hostnames && hostname != NULL) | |
0ad95472 AR |
332 | cached = nsm_lookup_hostname(&ln->nsm_handles, |
333 | hostname, hostname_len); | |
77a3ef33 | 334 | else |
0ad95472 | 335 | cached = nsm_lookup_addr(&ln->nsm_handles, sap); |
77a3ef33 CL |
336 | |
337 | if (cached != NULL) { | |
338 | atomic_inc(&cached->sm_count); | |
339 | spin_unlock(&nsm_lock); | |
340 | kfree(new); | |
341 | dprintk("lockd: found nsm_handle for %s (%s), " | |
342 | "cnt %d\n", cached->sm_name, | |
343 | cached->sm_addrbuf, | |
344 | atomic_read(&cached->sm_count)); | |
345 | return cached; | |
67c6d107 | 346 | } |
77a3ef33 CL |
347 | |
348 | if (new != NULL) { | |
0ad95472 | 349 | list_add(&new->sm_link, &ln->nsm_handles); |
77a3ef33 | 350 | spin_unlock(&nsm_lock); |
5cf1c4b1 | 351 | dprintk("lockd: created nsm_handle for %s (%s)\n", |
77a3ef33 CL |
352 | new->sm_name, new->sm_addrbuf); |
353 | return new; | |
67c6d107 | 354 | } |
77a3ef33 | 355 | |
67c6d107 CL |
356 | spin_unlock(&nsm_lock); |
357 | ||
77a3ef33 CL |
358 | new = nsm_create_handle(sap, salen, hostname, hostname_len); |
359 | if (unlikely(new == NULL)) | |
67c6d107 | 360 | return NULL; |
67c6d107 | 361 | goto retry; |
67c6d107 CL |
362 | } |
363 | ||
3420a8c4 CL |
364 | /** |
365 | * nsm_reboot_lookup - match NLMPROC_SM_NOTIFY arguments to an nsm_handle | |
0ad95472 | 366 | * @net: network namespace |
3420a8c4 CL |
367 | * @info: pointer to NLMPROC_SM_NOTIFY arguments |
368 | * | |
7e469af9 JL |
369 | * Returns a matching nsm_handle if found in the nsm cache. The returned |
370 | * nsm_handle's reference count is bumped. Otherwise returns NULL if some | |
371 | * error occurred. | |
3420a8c4 | 372 | */ |
0ad95472 AR |
373 | struct nsm_handle *nsm_reboot_lookup(const struct net *net, |
374 | const struct nlm_reboot *info) | |
3420a8c4 CL |
375 | { |
376 | struct nsm_handle *cached; | |
0ad95472 | 377 | struct lockd_net *ln = net_generic(net, lockd_net_id); |
3420a8c4 CL |
378 | |
379 | spin_lock(&nsm_lock); | |
380 | ||
0ad95472 | 381 | cached = nsm_lookup_priv(&ln->nsm_handles, &info->priv); |
3420a8c4 CL |
382 | if (unlikely(cached == NULL)) { |
383 | spin_unlock(&nsm_lock); | |
384 | dprintk("lockd: never saw rebooted peer '%.*s' before\n", | |
385 | info->len, info->mon); | |
386 | return cached; | |
387 | } | |
388 | ||
389 | atomic_inc(&cached->sm_count); | |
390 | spin_unlock(&nsm_lock); | |
391 | ||
3420a8c4 CL |
392 | dprintk("lockd: host %s (%s) rebooted, cnt %d\n", |
393 | cached->sm_name, cached->sm_addrbuf, | |
394 | atomic_read(&cached->sm_count)); | |
395 | return cached; | |
396 | } | |
397 | ||
67c6d107 CL |
398 | /** |
399 | * nsm_release - Release an NSM handle | |
400 | * @nsm: pointer to handle to be released | |
401 | * | |
402 | */ | |
403 | void nsm_release(struct nsm_handle *nsm) | |
404 | { | |
67c6d107 CL |
405 | if (atomic_dec_and_lock(&nsm->sm_count, &nsm_lock)) { |
406 | list_del(&nsm->sm_link); | |
407 | spin_unlock(&nsm_lock); | |
5cf1c4b1 CL |
408 | dprintk("lockd: destroyed nsm_handle for %s (%s)\n", |
409 | nsm->sm_name, nsm->sm_addrbuf); | |
67c6d107 CL |
410 | kfree(nsm); |
411 | } | |
412 | } | |
413 | ||
1da177e4 LT |
414 | /* |
415 | * XDR functions for NSM. | |
2ca7754d CL |
416 | * |
417 | * See http://www.opengroup.org/ for details on the Network | |
418 | * Status Monitor wire protocol. | |
1da177e4 LT |
419 | */ |
420 | ||
49b17004 | 421 | static void encode_nsm_string(struct xdr_stream *xdr, const char *string) |
099bd05f | 422 | { |
03eb1dcb CL |
423 | const u32 len = strlen(string); |
424 | __be32 *p; | |
425 | ||
49b17004 | 426 | p = xdr_reserve_space(xdr, 4 + len); |
03eb1dcb | 427 | xdr_encode_opaque(p, string, len); |
099bd05f CL |
428 | } |
429 | ||
49695174 CL |
430 | /* |
431 | * "mon_name" specifies the host to be monitored. | |
49695174 | 432 | */ |
49b17004 | 433 | static void encode_mon_name(struct xdr_stream *xdr, const struct nsm_args *argp) |
49695174 | 434 | { |
49b17004 | 435 | encode_nsm_string(xdr, argp->mon_name); |
49695174 CL |
436 | } |
437 | ||
850c95fd CL |
438 | /* |
439 | * The "my_id" argument specifies the hostname and RPC procedure | |
440 | * to be called when the status manager receives notification | |
36e8e668 | 441 | * (via the NLMPROC_SM_NOTIFY call) that the state of host "mon_name" |
850c95fd CL |
442 | * has changed. |
443 | */ | |
49b17004 | 444 | static void encode_my_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
850c95fd | 445 | { |
03eb1dcb CL |
446 | __be32 *p; |
447 | ||
303a7ce9 | 448 | encode_nsm_string(xdr, argp->nodename); |
49b17004 CL |
449 | p = xdr_reserve_space(xdr, 4 + 4 + 4); |
450 | *p++ = cpu_to_be32(argp->prog); | |
451 | *p++ = cpu_to_be32(argp->vers); | |
452 | *p = cpu_to_be32(argp->proc); | |
850c95fd CL |
453 | } |
454 | ||
ea72a7f1 CL |
455 | /* |
456 | * The "mon_id" argument specifies the non-private arguments | |
36e8e668 | 457 | * of an NSMPROC_MON or NSMPROC_UNMON call. |
ea72a7f1 | 458 | */ |
49b17004 | 459 | static void encode_mon_id(struct xdr_stream *xdr, const struct nsm_args *argp) |
ea72a7f1 | 460 | { |
49b17004 CL |
461 | encode_mon_name(xdr, argp); |
462 | encode_my_id(xdr, argp); | |
ea72a7f1 CL |
463 | } |
464 | ||
0490a54a CL |
465 | /* |
466 | * The "priv" argument may contain private information required | |
36e8e668 CL |
467 | * by the NSMPROC_MON call. This information will be supplied in the |
468 | * NLMPROC_SM_NOTIFY call. | |
0490a54a | 469 | */ |
49b17004 | 470 | static void encode_priv(struct xdr_stream *xdr, const struct nsm_args *argp) |
0490a54a | 471 | { |
03eb1dcb CL |
472 | __be32 *p; |
473 | ||
474 | p = xdr_reserve_space(xdr, SM_PRIV_SIZE); | |
cab2d3c9 | 475 | xdr_encode_opaque_fixed(p, argp->priv->data, SM_PRIV_SIZE); |
0490a54a CL |
476 | } |
477 | ||
9f06c719 CL |
478 | static void nsm_xdr_enc_mon(struct rpc_rqst *req, struct xdr_stream *xdr, |
479 | const struct nsm_args *argp) | |
1da177e4 | 480 | { |
9f06c719 CL |
481 | encode_mon_id(xdr, argp); |
482 | encode_priv(xdr, argp); | |
1da177e4 LT |
483 | } |
484 | ||
9f06c719 CL |
485 | static void nsm_xdr_enc_unmon(struct rpc_rqst *req, struct xdr_stream *xdr, |
486 | const struct nsm_args *argp) | |
1da177e4 | 487 | { |
9f06c719 | 488 | encode_mon_id(xdr, argp); |
1da177e4 LT |
489 | } |
490 | ||
bf269551 CL |
491 | static int nsm_xdr_dec_stat_res(struct rpc_rqst *rqstp, |
492 | struct xdr_stream *xdr, | |
493 | struct nsm_res *resp) | |
1da177e4 | 494 | { |
bf269551 | 495 | __be32 *p; |
03eb1dcb | 496 | |
bf269551 | 497 | p = xdr_inline_decode(xdr, 4 + 4); |
03eb1dcb CL |
498 | if (unlikely(p == NULL)) |
499 | return -EIO; | |
49b17004 CL |
500 | resp->status = be32_to_cpup(p++); |
501 | resp->state = be32_to_cpup(p); | |
03eb1dcb | 502 | |
bf269551 CL |
503 | dprintk("lockd: %s status %d state %d\n", |
504 | __func__, resp->status, resp->state); | |
1da177e4 LT |
505 | return 0; |
506 | } | |
507 | ||
bf269551 CL |
508 | static int nsm_xdr_dec_stat(struct rpc_rqst *rqstp, |
509 | struct xdr_stream *xdr, | |
510 | struct nsm_res *resp) | |
1da177e4 | 511 | { |
bf269551 | 512 | __be32 *p; |
03eb1dcb | 513 | |
bf269551 | 514 | p = xdr_inline_decode(xdr, 4); |
03eb1dcb CL |
515 | if (unlikely(p == NULL)) |
516 | return -EIO; | |
49b17004 | 517 | resp->state = be32_to_cpup(p); |
03eb1dcb | 518 | |
bf269551 | 519 | dprintk("lockd: %s state %d\n", __func__, resp->state); |
1da177e4 LT |
520 | return 0; |
521 | } | |
522 | ||
523 | #define SM_my_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN)) | |
2ca7754d CL |
524 | #define SM_my_id_sz (SM_my_name_sz+3) |
525 | #define SM_mon_name_sz (1+XDR_QUADLEN(SM_MAXSTRLEN)) | |
526 | #define SM_mon_id_sz (SM_mon_name_sz+SM_my_id_sz) | |
0490a54a CL |
527 | #define SM_priv_sz (XDR_QUADLEN(SM_PRIV_SIZE)) |
528 | #define SM_mon_sz (SM_mon_id_sz+SM_priv_sz) | |
1da177e4 LT |
529 | #define SM_monres_sz 2 |
530 | #define SM_unmonres_sz 1 | |
531 | ||
1da177e4 | 532 | static struct rpc_procinfo nsm_procedures[] = { |
36e8e668 CL |
533 | [NSMPROC_MON] = { |
534 | .p_proc = NSMPROC_MON, | |
9f06c719 | 535 | .p_encode = (kxdreproc_t)nsm_xdr_enc_mon, |
bf269551 | 536 | .p_decode = (kxdrdproc_t)nsm_xdr_dec_stat_res, |
2bea90d4 CL |
537 | .p_arglen = SM_mon_sz, |
538 | .p_replen = SM_monres_sz, | |
36e8e668 | 539 | .p_statidx = NSMPROC_MON, |
cc0175c1 | 540 | .p_name = "MONITOR", |
1da177e4 | 541 | }, |
36e8e668 CL |
542 | [NSMPROC_UNMON] = { |
543 | .p_proc = NSMPROC_UNMON, | |
9f06c719 | 544 | .p_encode = (kxdreproc_t)nsm_xdr_enc_unmon, |
bf269551 | 545 | .p_decode = (kxdrdproc_t)nsm_xdr_dec_stat, |
2bea90d4 CL |
546 | .p_arglen = SM_mon_id_sz, |
547 | .p_replen = SM_unmonres_sz, | |
36e8e668 | 548 | .p_statidx = NSMPROC_UNMON, |
cc0175c1 | 549 | .p_name = "UNMONITOR", |
1da177e4 LT |
550 | }, |
551 | }; | |
552 | ||
a613fa16 | 553 | static const struct rpc_version nsm_version1 = { |
e8c96f8c TK |
554 | .number = 1, |
555 | .nrprocs = ARRAY_SIZE(nsm_procedures), | |
1da177e4 LT |
556 | .procs = nsm_procedures |
557 | }; | |
558 | ||
a613fa16 | 559 | static const struct rpc_version *nsm_version[] = { |
1da177e4 LT |
560 | [1] = &nsm_version1, |
561 | }; | |
562 | ||
563 | static struct rpc_stat nsm_stats; | |
564 | ||
a613fa16 | 565 | static const struct rpc_program nsm_program = { |
1da177e4 | 566 | .name = "statd", |
36e8e668 | 567 | .number = NSM_PROGRAM, |
e8c96f8c | 568 | .nrvers = ARRAY_SIZE(nsm_version), |
1da177e4 LT |
569 | .version = nsm_version, |
570 | .stats = &nsm_stats | |
571 | }; |