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Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
55aa4f58 | 2 | * linux/net/sunrpc/clnt.c |
1da177e4 LT |
3 | * |
4 | * This file contains the high-level RPC interface. | |
5 | * It is modeled as a finite state machine to support both synchronous | |
6 | * and asynchronous requests. | |
7 | * | |
8 | * - RPC header generation and argument serialization. | |
9 | * - Credential refresh. | |
10 | * - TCP connect handling. | |
11 | * - Retry of operation when it is suspected the operation failed because | |
12 | * of uid squashing on the server, or when the credentials were stale | |
13 | * and need to be refreshed, or when a packet was damaged in transit. | |
14 | * This may be have to be moved to the VFS layer. | |
15 | * | |
16 | * NB: BSD uses a more intelligent approach to guessing when a request | |
17 | * or reply has been lost by keeping the RTO estimate for each procedure. | |
18 | * We currently make do with a constant timeout value. | |
19 | * | |
20 | * Copyright (C) 1992,1993 Rick Sladkey <jrs@world.std.com> | |
21 | * Copyright (C) 1995,1996 Olaf Kirch <okir@monad.swb.de> | |
22 | */ | |
23 | ||
24 | #include <asm/system.h> | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/types.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/slab.h> | |
6d5fcb5a | 30 | #include <linux/smp_lock.h> |
1da177e4 | 31 | #include <linux/utsname.h> |
11c556b3 | 32 | #include <linux/workqueue.h> |
510deb0d | 33 | #include <linux/in6.h> |
1da177e4 LT |
34 | |
35 | #include <linux/sunrpc/clnt.h> | |
1da177e4 | 36 | #include <linux/sunrpc/rpc_pipe_fs.h> |
11c556b3 | 37 | #include <linux/sunrpc/metrics.h> |
1da177e4 LT |
38 | |
39 | ||
1da177e4 LT |
40 | #ifdef RPC_DEBUG |
41 | # define RPCDBG_FACILITY RPCDBG_CALL | |
42 | #endif | |
43 | ||
46121cf7 CL |
44 | #define dprint_status(t) \ |
45 | dprintk("RPC: %5u %s (status %d)\n", t->tk_pid, \ | |
0dc47877 | 46 | __func__, t->tk_status) |
46121cf7 | 47 | |
188fef11 TM |
48 | /* |
49 | * All RPC clients are linked into this list | |
50 | */ | |
51 | static LIST_HEAD(all_clients); | |
52 | static DEFINE_SPINLOCK(rpc_client_lock); | |
53 | ||
1da177e4 LT |
54 | static DECLARE_WAIT_QUEUE_HEAD(destroy_wait); |
55 | ||
56 | ||
57 | static void call_start(struct rpc_task *task); | |
58 | static void call_reserve(struct rpc_task *task); | |
59 | static void call_reserveresult(struct rpc_task *task); | |
60 | static void call_allocate(struct rpc_task *task); | |
61 | static void call_encode(struct rpc_task *task); | |
62 | static void call_decode(struct rpc_task *task); | |
63 | static void call_bind(struct rpc_task *task); | |
da351878 | 64 | static void call_bind_status(struct rpc_task *task); |
1da177e4 LT |
65 | static void call_transmit(struct rpc_task *task); |
66 | static void call_status(struct rpc_task *task); | |
940e3318 | 67 | static void call_transmit_status(struct rpc_task *task); |
1da177e4 LT |
68 | static void call_refresh(struct rpc_task *task); |
69 | static void call_refreshresult(struct rpc_task *task); | |
70 | static void call_timeout(struct rpc_task *task); | |
71 | static void call_connect(struct rpc_task *task); | |
72 | static void call_connect_status(struct rpc_task *task); | |
d8ed029d AD |
73 | static __be32 * call_header(struct rpc_task *task); |
74 | static __be32 * call_verify(struct rpc_task *task); | |
1da177e4 | 75 | |
64c91a1f TM |
76 | static int rpc_ping(struct rpc_clnt *clnt, int flags); |
77 | ||
188fef11 TM |
78 | static void rpc_register_client(struct rpc_clnt *clnt) |
79 | { | |
80 | spin_lock(&rpc_client_lock); | |
81 | list_add(&clnt->cl_clients, &all_clients); | |
82 | spin_unlock(&rpc_client_lock); | |
83 | } | |
84 | ||
85 | static void rpc_unregister_client(struct rpc_clnt *clnt) | |
86 | { | |
87 | spin_lock(&rpc_client_lock); | |
88 | list_del(&clnt->cl_clients); | |
89 | spin_unlock(&rpc_client_lock); | |
90 | } | |
1da177e4 LT |
91 | |
92 | static int | |
93 | rpc_setup_pipedir(struct rpc_clnt *clnt, char *dir_name) | |
94 | { | |
f134585a | 95 | static uint32_t clntid; |
1da177e4 LT |
96 | int error; |
97 | ||
54281548 TM |
98 | clnt->cl_vfsmnt = ERR_PTR(-ENOENT); |
99 | clnt->cl_dentry = ERR_PTR(-ENOENT); | |
1da177e4 LT |
100 | if (dir_name == NULL) |
101 | return 0; | |
54281548 TM |
102 | |
103 | clnt->cl_vfsmnt = rpc_get_mount(); | |
104 | if (IS_ERR(clnt->cl_vfsmnt)) | |
105 | return PTR_ERR(clnt->cl_vfsmnt); | |
106 | ||
f134585a TM |
107 | for (;;) { |
108 | snprintf(clnt->cl_pathname, sizeof(clnt->cl_pathname), | |
109 | "%s/clnt%x", dir_name, | |
110 | (unsigned int)clntid++); | |
111 | clnt->cl_pathname[sizeof(clnt->cl_pathname) - 1] = '\0'; | |
112 | clnt->cl_dentry = rpc_mkdir(clnt->cl_pathname, clnt); | |
113 | if (!IS_ERR(clnt->cl_dentry)) | |
114 | return 0; | |
1da177e4 | 115 | error = PTR_ERR(clnt->cl_dentry); |
f134585a TM |
116 | if (error != -EEXIST) { |
117 | printk(KERN_INFO "RPC: Couldn't create pipefs entry %s, error %d\n", | |
118 | clnt->cl_pathname, error); | |
54281548 | 119 | rpc_put_mount(); |
f134585a TM |
120 | return error; |
121 | } | |
1da177e4 LT |
122 | } |
123 | } | |
124 | ||
698b6d08 | 125 | static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args, struct rpc_xprt *xprt) |
1da177e4 | 126 | { |
698b6d08 | 127 | struct rpc_program *program = args->program; |
1da177e4 LT |
128 | struct rpc_version *version; |
129 | struct rpc_clnt *clnt = NULL; | |
6a19275a | 130 | struct rpc_auth *auth; |
1da177e4 | 131 | int err; |
06b8d255 CL |
132 | size_t len; |
133 | ||
134 | /* sanity check the name before trying to print it */ | |
135 | err = -EINVAL; | |
698b6d08 | 136 | len = strlen(args->servername); |
06b8d255 CL |
137 | if (len > RPC_MAXNETNAMELEN) |
138 | goto out_no_rpciod; | |
139 | len++; | |
1da177e4 | 140 | |
46121cf7 | 141 | dprintk("RPC: creating %s client for %s (xprt %p)\n", |
698b6d08 | 142 | program->name, args->servername, xprt); |
1da177e4 | 143 | |
4ada539e TM |
144 | err = rpciod_up(); |
145 | if (err) | |
146 | goto out_no_rpciod; | |
1da177e4 LT |
147 | err = -EINVAL; |
148 | if (!xprt) | |
712917d1 | 149 | goto out_no_xprt; |
698b6d08 TM |
150 | |
151 | if (args->version >= program->nrvers) | |
152 | goto out_err; | |
153 | version = program->version[args->version]; | |
154 | if (version == NULL) | |
1da177e4 LT |
155 | goto out_err; |
156 | ||
157 | err = -ENOMEM; | |
0da974f4 | 158 | clnt = kzalloc(sizeof(*clnt), GFP_KERNEL); |
1da177e4 LT |
159 | if (!clnt) |
160 | goto out_err; | |
1da177e4 LT |
161 | clnt->cl_parent = clnt; |
162 | ||
163 | clnt->cl_server = clnt->cl_inline_name; | |
1da177e4 LT |
164 | if (len > sizeof(clnt->cl_inline_name)) { |
165 | char *buf = kmalloc(len, GFP_KERNEL); | |
698b6d08 | 166 | if (buf != NULL) |
1da177e4 LT |
167 | clnt->cl_server = buf; |
168 | else | |
169 | len = sizeof(clnt->cl_inline_name); | |
170 | } | |
698b6d08 | 171 | strlcpy(clnt->cl_server, args->servername, len); |
1da177e4 LT |
172 | |
173 | clnt->cl_xprt = xprt; | |
174 | clnt->cl_procinfo = version->procs; | |
175 | clnt->cl_maxproc = version->nrprocs; | |
176 | clnt->cl_protname = program->name; | |
1da177e4 LT |
177 | clnt->cl_prog = program->number; |
178 | clnt->cl_vers = version->number; | |
1da177e4 | 179 | clnt->cl_stats = program->stats; |
11c556b3 | 180 | clnt->cl_metrics = rpc_alloc_iostats(clnt); |
23bf85ba TM |
181 | err = -ENOMEM; |
182 | if (clnt->cl_metrics == NULL) | |
183 | goto out_no_stats; | |
3e32a5d9 | 184 | clnt->cl_program = program; |
6529eba0 | 185 | INIT_LIST_HEAD(&clnt->cl_tasks); |
4bef61ff | 186 | spin_lock_init(&clnt->cl_lock); |
1da177e4 | 187 | |
ec739ef0 | 188 | if (!xprt_bound(clnt->cl_xprt)) |
1da177e4 LT |
189 | clnt->cl_autobind = 1; |
190 | ||
ba7392bb TM |
191 | clnt->cl_timeout = xprt->timeout; |
192 | if (args->timeout != NULL) { | |
193 | memcpy(&clnt->cl_timeout_default, args->timeout, | |
194 | sizeof(clnt->cl_timeout_default)); | |
195 | clnt->cl_timeout = &clnt->cl_timeout_default; | |
196 | } | |
197 | ||
1da177e4 | 198 | clnt->cl_rtt = &clnt->cl_rtt_default; |
ba7392bb | 199 | rpc_init_rtt(&clnt->cl_rtt_default, clnt->cl_timeout->to_initval); |
1da177e4 | 200 | |
34f52e35 TM |
201 | kref_init(&clnt->cl_kref); |
202 | ||
1da177e4 LT |
203 | err = rpc_setup_pipedir(clnt, program->pipe_dir_name); |
204 | if (err < 0) | |
205 | goto out_no_path; | |
206 | ||
698b6d08 | 207 | auth = rpcauth_create(args->authflavor, clnt); |
6a19275a | 208 | if (IS_ERR(auth)) { |
1da177e4 | 209 | printk(KERN_INFO "RPC: Couldn't create auth handle (flavor %u)\n", |
698b6d08 | 210 | args->authflavor); |
6a19275a | 211 | err = PTR_ERR(auth); |
1da177e4 LT |
212 | goto out_no_auth; |
213 | } | |
214 | ||
215 | /* save the nodename */ | |
e9ff3990 | 216 | clnt->cl_nodelen = strlen(utsname()->nodename); |
1da177e4 LT |
217 | if (clnt->cl_nodelen > UNX_MAXNODENAME) |
218 | clnt->cl_nodelen = UNX_MAXNODENAME; | |
e9ff3990 | 219 | memcpy(clnt->cl_nodename, utsname()->nodename, clnt->cl_nodelen); |
6529eba0 | 220 | rpc_register_client(clnt); |
1da177e4 LT |
221 | return clnt; |
222 | ||
223 | out_no_auth: | |
54281548 | 224 | if (!IS_ERR(clnt->cl_dentry)) { |
dff02cc1 | 225 | rpc_rmdir(clnt->cl_dentry); |
54281548 TM |
226 | rpc_put_mount(); |
227 | } | |
1da177e4 | 228 | out_no_path: |
23bf85ba TM |
229 | rpc_free_iostats(clnt->cl_metrics); |
230 | out_no_stats: | |
1da177e4 LT |
231 | if (clnt->cl_server != clnt->cl_inline_name) |
232 | kfree(clnt->cl_server); | |
233 | kfree(clnt); | |
234 | out_err: | |
6b6ca86b | 235 | xprt_put(xprt); |
712917d1 | 236 | out_no_xprt: |
4ada539e TM |
237 | rpciod_down(); |
238 | out_no_rpciod: | |
1da177e4 LT |
239 | return ERR_PTR(err); |
240 | } | |
241 | ||
c2866763 CL |
242 | /* |
243 | * rpc_create - create an RPC client and transport with one call | |
244 | * @args: rpc_clnt create argument structure | |
245 | * | |
246 | * Creates and initializes an RPC transport and an RPC client. | |
247 | * | |
248 | * It can ping the server in order to determine if it is up, and to see if | |
249 | * it supports this program and version. RPC_CLNT_CREATE_NOPING disables | |
250 | * this behavior so asynchronous tasks can also use rpc_create. | |
251 | */ | |
252 | struct rpc_clnt *rpc_create(struct rpc_create_args *args) | |
253 | { | |
254 | struct rpc_xprt *xprt; | |
255 | struct rpc_clnt *clnt; | |
3c341b0b | 256 | struct xprt_create xprtargs = { |
4fa016eb | 257 | .ident = args->protocol, |
d3bc9a1d | 258 | .srcaddr = args->saddress, |
96802a09 FM |
259 | .dstaddr = args->address, |
260 | .addrlen = args->addrsize, | |
96802a09 | 261 | }; |
510deb0d | 262 | char servername[48]; |
c2866763 | 263 | |
43780b87 CL |
264 | /* |
265 | * If the caller chooses not to specify a hostname, whip | |
266 | * up a string representation of the passed-in address. | |
267 | */ | |
268 | if (args->servername == NULL) { | |
510deb0d CL |
269 | servername[0] = '\0'; |
270 | switch (args->address->sa_family) { | |
271 | case AF_INET: { | |
272 | struct sockaddr_in *sin = | |
273 | (struct sockaddr_in *)args->address; | |
274 | snprintf(servername, sizeof(servername), NIPQUAD_FMT, | |
275 | NIPQUAD(sin->sin_addr.s_addr)); | |
276 | break; | |
277 | } | |
278 | case AF_INET6: { | |
279 | struct sockaddr_in6 *sin = | |
280 | (struct sockaddr_in6 *)args->address; | |
281 | snprintf(servername, sizeof(servername), NIP6_FMT, | |
282 | NIP6(sin->sin6_addr)); | |
283 | break; | |
284 | } | |
285 | default: | |
286 | /* caller wants default server name, but | |
287 | * address family isn't recognized. */ | |
288 | return ERR_PTR(-EINVAL); | |
289 | } | |
43780b87 CL |
290 | args->servername = servername; |
291 | } | |
292 | ||
510deb0d CL |
293 | xprt = xprt_create_transport(&xprtargs); |
294 | if (IS_ERR(xprt)) | |
295 | return (struct rpc_clnt *)xprt; | |
296 | ||
c2866763 CL |
297 | /* |
298 | * By default, kernel RPC client connects from a reserved port. | |
299 | * CAP_NET_BIND_SERVICE will not be set for unprivileged requesters, | |
300 | * but it is always enabled for rpciod, which handles the connect | |
301 | * operation. | |
302 | */ | |
303 | xprt->resvport = 1; | |
304 | if (args->flags & RPC_CLNT_CREATE_NONPRIVPORT) | |
305 | xprt->resvport = 0; | |
306 | ||
698b6d08 | 307 | clnt = rpc_new_client(args, xprt); |
c2866763 CL |
308 | if (IS_ERR(clnt)) |
309 | return clnt; | |
310 | ||
311 | if (!(args->flags & RPC_CLNT_CREATE_NOPING)) { | |
150030b7 | 312 | int err = rpc_ping(clnt, RPC_TASK_SOFT); |
c2866763 CL |
313 | if (err != 0) { |
314 | rpc_shutdown_client(clnt); | |
315 | return ERR_PTR(err); | |
316 | } | |
317 | } | |
318 | ||
319 | clnt->cl_softrtry = 1; | |
320 | if (args->flags & RPC_CLNT_CREATE_HARDRTRY) | |
321 | clnt->cl_softrtry = 0; | |
322 | ||
c2866763 CL |
323 | if (args->flags & RPC_CLNT_CREATE_AUTOBIND) |
324 | clnt->cl_autobind = 1; | |
43d78ef2 CL |
325 | if (args->flags & RPC_CLNT_CREATE_DISCRTRY) |
326 | clnt->cl_discrtry = 1; | |
c2866763 CL |
327 | |
328 | return clnt; | |
329 | } | |
b86acd50 | 330 | EXPORT_SYMBOL_GPL(rpc_create); |
c2866763 | 331 | |
1da177e4 LT |
332 | /* |
333 | * This function clones the RPC client structure. It allows us to share the | |
334 | * same transport while varying parameters such as the authentication | |
335 | * flavour. | |
336 | */ | |
337 | struct rpc_clnt * | |
338 | rpc_clone_client(struct rpc_clnt *clnt) | |
339 | { | |
340 | struct rpc_clnt *new; | |
3e32a5d9 | 341 | int err = -ENOMEM; |
1da177e4 | 342 | |
e69062b4 | 343 | new = kmemdup(clnt, sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
344 | if (!new) |
345 | goto out_no_clnt; | |
d431a555 TM |
346 | new->cl_parent = clnt; |
347 | /* Turn off autobind on clones */ | |
348 | new->cl_autobind = 0; | |
349 | INIT_LIST_HEAD(&new->cl_tasks); | |
350 | spin_lock_init(&new->cl_lock); | |
ba7392bb | 351 | rpc_init_rtt(&new->cl_rtt_default, clnt->cl_timeout->to_initval); |
23bf85ba TM |
352 | new->cl_metrics = rpc_alloc_iostats(clnt); |
353 | if (new->cl_metrics == NULL) | |
354 | goto out_no_stats; | |
34f52e35 | 355 | kref_init(&new->cl_kref); |
3e32a5d9 TM |
356 | err = rpc_setup_pipedir(new, clnt->cl_program->pipe_dir_name); |
357 | if (err != 0) | |
358 | goto out_no_path; | |
1da177e4 LT |
359 | if (new->cl_auth) |
360 | atomic_inc(&new->cl_auth->au_count); | |
d431a555 TM |
361 | xprt_get(clnt->cl_xprt); |
362 | kref_get(&clnt->cl_kref); | |
6529eba0 | 363 | rpc_register_client(new); |
4ada539e | 364 | rpciod_up(); |
1da177e4 | 365 | return new; |
3e32a5d9 TM |
366 | out_no_path: |
367 | rpc_free_iostats(new->cl_metrics); | |
23bf85ba TM |
368 | out_no_stats: |
369 | kfree(new); | |
1da177e4 | 370 | out_no_clnt: |
0dc47877 | 371 | dprintk("RPC: %s: returned error %d\n", __func__, err); |
3e32a5d9 | 372 | return ERR_PTR(err); |
1da177e4 | 373 | } |
e8914c65 | 374 | EXPORT_SYMBOL_GPL(rpc_clone_client); |
1da177e4 LT |
375 | |
376 | /* | |
377 | * Properly shut down an RPC client, terminating all outstanding | |
90c5755f | 378 | * requests. |
1da177e4 | 379 | */ |
4c402b40 | 380 | void rpc_shutdown_client(struct rpc_clnt *clnt) |
1da177e4 | 381 | { |
34f52e35 TM |
382 | dprintk("RPC: shutting down %s client for %s\n", |
383 | clnt->cl_protname, clnt->cl_server); | |
1da177e4 | 384 | |
34f52e35 | 385 | while (!list_empty(&clnt->cl_tasks)) { |
1da177e4 | 386 | rpc_killall_tasks(clnt); |
532347e2 | 387 | wait_event_timeout(destroy_wait, |
34f52e35 | 388 | list_empty(&clnt->cl_tasks), 1*HZ); |
1da177e4 LT |
389 | } |
390 | ||
4c402b40 | 391 | rpc_release_client(clnt); |
1da177e4 | 392 | } |
e8914c65 | 393 | EXPORT_SYMBOL_GPL(rpc_shutdown_client); |
1da177e4 LT |
394 | |
395 | /* | |
34f52e35 | 396 | * Free an RPC client |
1da177e4 | 397 | */ |
34f52e35 TM |
398 | static void |
399 | rpc_free_client(struct kref *kref) | |
1da177e4 | 400 | { |
34f52e35 | 401 | struct rpc_clnt *clnt = container_of(kref, struct rpc_clnt, cl_kref); |
1da177e4 | 402 | |
46121cf7 | 403 | dprintk("RPC: destroying %s client for %s\n", |
1da177e4 | 404 | clnt->cl_protname, clnt->cl_server); |
8f8e7a50 | 405 | if (!IS_ERR(clnt->cl_dentry)) { |
dff02cc1 | 406 | rpc_rmdir(clnt->cl_dentry); |
8f8e7a50 TM |
407 | rpc_put_mount(); |
408 | } | |
3e32a5d9 | 409 | if (clnt->cl_parent != clnt) { |
8ad7c892 | 410 | rpc_release_client(clnt->cl_parent); |
3e32a5d9 TM |
411 | goto out_free; |
412 | } | |
1da177e4 LT |
413 | if (clnt->cl_server != clnt->cl_inline_name) |
414 | kfree(clnt->cl_server); | |
415 | out_free: | |
6529eba0 | 416 | rpc_unregister_client(clnt); |
11c556b3 CL |
417 | rpc_free_iostats(clnt->cl_metrics); |
418 | clnt->cl_metrics = NULL; | |
6b6ca86b | 419 | xprt_put(clnt->cl_xprt); |
4ada539e | 420 | rpciod_down(); |
1da177e4 | 421 | kfree(clnt); |
1da177e4 LT |
422 | } |
423 | ||
1dd17ec6 TM |
424 | /* |
425 | * Free an RPC client | |
426 | */ | |
427 | static void | |
428 | rpc_free_auth(struct kref *kref) | |
429 | { | |
430 | struct rpc_clnt *clnt = container_of(kref, struct rpc_clnt, cl_kref); | |
431 | ||
432 | if (clnt->cl_auth == NULL) { | |
433 | rpc_free_client(kref); | |
434 | return; | |
435 | } | |
436 | ||
437 | /* | |
438 | * Note: RPCSEC_GSS may need to send NULL RPC calls in order to | |
439 | * release remaining GSS contexts. This mechanism ensures | |
440 | * that it can do so safely. | |
441 | */ | |
442 | kref_init(kref); | |
443 | rpcauth_release(clnt->cl_auth); | |
444 | clnt->cl_auth = NULL; | |
445 | kref_put(kref, rpc_free_client); | |
446 | } | |
447 | ||
1da177e4 | 448 | /* |
34f52e35 | 449 | * Release reference to the RPC client |
1da177e4 LT |
450 | */ |
451 | void | |
452 | rpc_release_client(struct rpc_clnt *clnt) | |
453 | { | |
34f52e35 | 454 | dprintk("RPC: rpc_release_client(%p)\n", clnt); |
1da177e4 | 455 | |
34f52e35 TM |
456 | if (list_empty(&clnt->cl_tasks)) |
457 | wake_up(&destroy_wait); | |
1dd17ec6 | 458 | kref_put(&clnt->cl_kref, rpc_free_auth); |
34f52e35 TM |
459 | } |
460 | ||
007e251f AG |
461 | /** |
462 | * rpc_bind_new_program - bind a new RPC program to an existing client | |
65b6e42c RD |
463 | * @old: old rpc_client |
464 | * @program: rpc program to set | |
465 | * @vers: rpc program version | |
007e251f AG |
466 | * |
467 | * Clones the rpc client and sets up a new RPC program. This is mainly | |
468 | * of use for enabling different RPC programs to share the same transport. | |
469 | * The Sun NFSv2/v3 ACL protocol can do this. | |
470 | */ | |
471 | struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *old, | |
472 | struct rpc_program *program, | |
89eb21c3 | 473 | u32 vers) |
007e251f AG |
474 | { |
475 | struct rpc_clnt *clnt; | |
476 | struct rpc_version *version; | |
477 | int err; | |
478 | ||
479 | BUG_ON(vers >= program->nrvers || !program->version[vers]); | |
480 | version = program->version[vers]; | |
481 | clnt = rpc_clone_client(old); | |
482 | if (IS_ERR(clnt)) | |
483 | goto out; | |
484 | clnt->cl_procinfo = version->procs; | |
485 | clnt->cl_maxproc = version->nrprocs; | |
486 | clnt->cl_protname = program->name; | |
487 | clnt->cl_prog = program->number; | |
488 | clnt->cl_vers = version->number; | |
489 | clnt->cl_stats = program->stats; | |
150030b7 | 490 | err = rpc_ping(clnt, RPC_TASK_SOFT); |
007e251f AG |
491 | if (err != 0) { |
492 | rpc_shutdown_client(clnt); | |
493 | clnt = ERR_PTR(err); | |
494 | } | |
cca5172a | 495 | out: |
007e251f AG |
496 | return clnt; |
497 | } | |
e8914c65 | 498 | EXPORT_SYMBOL_GPL(rpc_bind_new_program); |
007e251f | 499 | |
1da177e4 LT |
500 | /* |
501 | * Default callback for async RPC calls | |
502 | */ | |
503 | static void | |
963d8fe5 | 504 | rpc_default_callback(struct rpc_task *task, void *data) |
1da177e4 LT |
505 | { |
506 | } | |
507 | ||
963d8fe5 TM |
508 | static const struct rpc_call_ops rpc_default_ops = { |
509 | .rpc_call_done = rpc_default_callback, | |
510 | }; | |
511 | ||
c970aa85 TM |
512 | /** |
513 | * rpc_run_task - Allocate a new RPC task, then run rpc_execute against it | |
514 | * @task_setup_data: pointer to task initialisation data | |
515 | */ | |
516 | struct rpc_task *rpc_run_task(const struct rpc_task_setup *task_setup_data) | |
6e5b70e9 TM |
517 | { |
518 | struct rpc_task *task, *ret; | |
6e5b70e9 | 519 | |
84115e1c | 520 | task = rpc_new_task(task_setup_data); |
6e5b70e9 | 521 | if (task == NULL) { |
84115e1c TM |
522 | rpc_release_calldata(task_setup_data->callback_ops, |
523 | task_setup_data->callback_data); | |
50859259 TM |
524 | ret = ERR_PTR(-ENOMEM); |
525 | goto out; | |
6e5b70e9 TM |
526 | } |
527 | ||
b3ef8b3b TM |
528 | if (task->tk_status != 0) { |
529 | ret = ERR_PTR(task->tk_status); | |
530 | rpc_put_task(task); | |
531 | goto out; | |
6e5b70e9 TM |
532 | } |
533 | atomic_inc(&task->tk_count); | |
534 | rpc_execute(task); | |
535 | ret = task; | |
536 | out: | |
6e5b70e9 TM |
537 | return ret; |
538 | } | |
c970aa85 | 539 | EXPORT_SYMBOL_GPL(rpc_run_task); |
6e5b70e9 TM |
540 | |
541 | /** | |
542 | * rpc_call_sync - Perform a synchronous RPC call | |
543 | * @clnt: pointer to RPC client | |
544 | * @msg: RPC call parameters | |
545 | * @flags: RPC call flags | |
1da177e4 | 546 | */ |
cbc20059 | 547 | int rpc_call_sync(struct rpc_clnt *clnt, const struct rpc_message *msg, int flags) |
1da177e4 LT |
548 | { |
549 | struct rpc_task *task; | |
84115e1c TM |
550 | struct rpc_task_setup task_setup_data = { |
551 | .rpc_client = clnt, | |
552 | .rpc_message = msg, | |
553 | .callback_ops = &rpc_default_ops, | |
554 | .flags = flags, | |
555 | }; | |
6e5b70e9 | 556 | int status; |
1da177e4 | 557 | |
1da177e4 LT |
558 | BUG_ON(flags & RPC_TASK_ASYNC); |
559 | ||
c970aa85 | 560 | task = rpc_run_task(&task_setup_data); |
6e5b70e9 TM |
561 | if (IS_ERR(task)) |
562 | return PTR_ERR(task); | |
e60859ac | 563 | status = task->tk_status; |
bde8f00c | 564 | rpc_put_task(task); |
1da177e4 LT |
565 | return status; |
566 | } | |
e8914c65 | 567 | EXPORT_SYMBOL_GPL(rpc_call_sync); |
1da177e4 | 568 | |
6e5b70e9 TM |
569 | /** |
570 | * rpc_call_async - Perform an asynchronous RPC call | |
571 | * @clnt: pointer to RPC client | |
572 | * @msg: RPC call parameters | |
573 | * @flags: RPC call flags | |
65b6e42c | 574 | * @tk_ops: RPC call ops |
6e5b70e9 | 575 | * @data: user call data |
1da177e4 LT |
576 | */ |
577 | int | |
cbc20059 | 578 | rpc_call_async(struct rpc_clnt *clnt, const struct rpc_message *msg, int flags, |
963d8fe5 | 579 | const struct rpc_call_ops *tk_ops, void *data) |
1da177e4 LT |
580 | { |
581 | struct rpc_task *task; | |
84115e1c TM |
582 | struct rpc_task_setup task_setup_data = { |
583 | .rpc_client = clnt, | |
584 | .rpc_message = msg, | |
585 | .callback_ops = tk_ops, | |
586 | .callback_data = data, | |
587 | .flags = flags|RPC_TASK_ASYNC, | |
588 | }; | |
1da177e4 | 589 | |
c970aa85 | 590 | task = rpc_run_task(&task_setup_data); |
6e5b70e9 TM |
591 | if (IS_ERR(task)) |
592 | return PTR_ERR(task); | |
593 | rpc_put_task(task); | |
594 | return 0; | |
1da177e4 | 595 | } |
e8914c65 | 596 | EXPORT_SYMBOL_GPL(rpc_call_async); |
1da177e4 | 597 | |
77de2c59 TM |
598 | void |
599 | rpc_call_start(struct rpc_task *task) | |
600 | { | |
601 | task->tk_action = call_start; | |
602 | } | |
603 | EXPORT_SYMBOL_GPL(rpc_call_start); | |
604 | ||
ed39440a CL |
605 | /** |
606 | * rpc_peeraddr - extract remote peer address from clnt's xprt | |
607 | * @clnt: RPC client structure | |
608 | * @buf: target buffer | |
65b6e42c | 609 | * @bufsize: length of target buffer |
ed39440a CL |
610 | * |
611 | * Returns the number of bytes that are actually in the stored address. | |
612 | */ | |
613 | size_t rpc_peeraddr(struct rpc_clnt *clnt, struct sockaddr *buf, size_t bufsize) | |
614 | { | |
615 | size_t bytes; | |
616 | struct rpc_xprt *xprt = clnt->cl_xprt; | |
617 | ||
618 | bytes = sizeof(xprt->addr); | |
619 | if (bytes > bufsize) | |
620 | bytes = bufsize; | |
621 | memcpy(buf, &clnt->cl_xprt->addr, bytes); | |
c4efcb1d | 622 | return xprt->addrlen; |
ed39440a | 623 | } |
b86acd50 | 624 | EXPORT_SYMBOL_GPL(rpc_peeraddr); |
ed39440a | 625 | |
f425eba4 CL |
626 | /** |
627 | * rpc_peeraddr2str - return remote peer address in printable format | |
628 | * @clnt: RPC client structure | |
629 | * @format: address format | |
630 | * | |
631 | */ | |
b454ae90 CL |
632 | const char *rpc_peeraddr2str(struct rpc_clnt *clnt, |
633 | enum rpc_display_format_t format) | |
f425eba4 CL |
634 | { |
635 | struct rpc_xprt *xprt = clnt->cl_xprt; | |
7559c7a2 CL |
636 | |
637 | if (xprt->address_strings[format] != NULL) | |
638 | return xprt->address_strings[format]; | |
639 | else | |
640 | return "unprintable"; | |
f425eba4 | 641 | } |
b86acd50 | 642 | EXPORT_SYMBOL_GPL(rpc_peeraddr2str); |
f425eba4 | 643 | |
1da177e4 LT |
644 | void |
645 | rpc_setbufsize(struct rpc_clnt *clnt, unsigned int sndsize, unsigned int rcvsize) | |
646 | { | |
647 | struct rpc_xprt *xprt = clnt->cl_xprt; | |
470056c2 CL |
648 | if (xprt->ops->set_buffer_size) |
649 | xprt->ops->set_buffer_size(xprt, sndsize, rcvsize); | |
1da177e4 | 650 | } |
e8914c65 | 651 | EXPORT_SYMBOL_GPL(rpc_setbufsize); |
1da177e4 LT |
652 | |
653 | /* | |
654 | * Return size of largest payload RPC client can support, in bytes | |
655 | * | |
656 | * For stream transports, this is one RPC record fragment (see RFC | |
657 | * 1831), as we don't support multi-record requests yet. For datagram | |
658 | * transports, this is the size of an IP packet minus the IP, UDP, and | |
659 | * RPC header sizes. | |
660 | */ | |
661 | size_t rpc_max_payload(struct rpc_clnt *clnt) | |
662 | { | |
663 | return clnt->cl_xprt->max_payload; | |
664 | } | |
b86acd50 | 665 | EXPORT_SYMBOL_GPL(rpc_max_payload); |
1da177e4 | 666 | |
35f5a422 CL |
667 | /** |
668 | * rpc_force_rebind - force transport to check that remote port is unchanged | |
669 | * @clnt: client to rebind | |
670 | * | |
671 | */ | |
672 | void rpc_force_rebind(struct rpc_clnt *clnt) | |
673 | { | |
674 | if (clnt->cl_autobind) | |
ec739ef0 | 675 | xprt_clear_bound(clnt->cl_xprt); |
35f5a422 | 676 | } |
b86acd50 | 677 | EXPORT_SYMBOL_GPL(rpc_force_rebind); |
35f5a422 | 678 | |
1da177e4 LT |
679 | /* |
680 | * Restart an (async) RPC call. Usually called from within the | |
681 | * exit handler. | |
682 | */ | |
683 | void | |
684 | rpc_restart_call(struct rpc_task *task) | |
685 | { | |
686 | if (RPC_ASSASSINATED(task)) | |
687 | return; | |
688 | ||
689 | task->tk_action = call_start; | |
690 | } | |
e8914c65 | 691 | EXPORT_SYMBOL_GPL(rpc_restart_call); |
1da177e4 LT |
692 | |
693 | /* | |
694 | * 0. Initial state | |
695 | * | |
696 | * Other FSM states can be visited zero or more times, but | |
697 | * this state is visited exactly once for each RPC. | |
698 | */ | |
699 | static void | |
700 | call_start(struct rpc_task *task) | |
701 | { | |
702 | struct rpc_clnt *clnt = task->tk_client; | |
703 | ||
46121cf7 CL |
704 | dprintk("RPC: %5u call_start %s%d proc %d (%s)\n", task->tk_pid, |
705 | clnt->cl_protname, clnt->cl_vers, | |
706 | task->tk_msg.rpc_proc->p_proc, | |
707 | (RPC_IS_ASYNC(task) ? "async" : "sync")); | |
1da177e4 LT |
708 | |
709 | /* Increment call count */ | |
710 | task->tk_msg.rpc_proc->p_count++; | |
711 | clnt->cl_stats->rpccnt++; | |
712 | task->tk_action = call_reserve; | |
713 | } | |
714 | ||
715 | /* | |
716 | * 1. Reserve an RPC call slot | |
717 | */ | |
718 | static void | |
719 | call_reserve(struct rpc_task *task) | |
720 | { | |
46121cf7 | 721 | dprint_status(task); |
1da177e4 LT |
722 | |
723 | if (!rpcauth_uptodatecred(task)) { | |
724 | task->tk_action = call_refresh; | |
725 | return; | |
726 | } | |
727 | ||
728 | task->tk_status = 0; | |
729 | task->tk_action = call_reserveresult; | |
730 | xprt_reserve(task); | |
731 | } | |
732 | ||
733 | /* | |
734 | * 1b. Grok the result of xprt_reserve() | |
735 | */ | |
736 | static void | |
737 | call_reserveresult(struct rpc_task *task) | |
738 | { | |
739 | int status = task->tk_status; | |
740 | ||
46121cf7 | 741 | dprint_status(task); |
1da177e4 LT |
742 | |
743 | /* | |
744 | * After a call to xprt_reserve(), we must have either | |
745 | * a request slot or else an error status. | |
746 | */ | |
747 | task->tk_status = 0; | |
748 | if (status >= 0) { | |
749 | if (task->tk_rqstp) { | |
750 | task->tk_action = call_allocate; | |
751 | return; | |
752 | } | |
753 | ||
754 | printk(KERN_ERR "%s: status=%d, but no request slot, exiting\n", | |
0dc47877 | 755 | __func__, status); |
1da177e4 LT |
756 | rpc_exit(task, -EIO); |
757 | return; | |
758 | } | |
759 | ||
760 | /* | |
761 | * Even though there was an error, we may have acquired | |
762 | * a request slot somehow. Make sure not to leak it. | |
763 | */ | |
764 | if (task->tk_rqstp) { | |
765 | printk(KERN_ERR "%s: status=%d, request allocated anyway\n", | |
0dc47877 | 766 | __func__, status); |
1da177e4 LT |
767 | xprt_release(task); |
768 | } | |
769 | ||
770 | switch (status) { | |
771 | case -EAGAIN: /* woken up; retry */ | |
772 | task->tk_action = call_reserve; | |
773 | return; | |
774 | case -EIO: /* probably a shutdown */ | |
775 | break; | |
776 | default: | |
777 | printk(KERN_ERR "%s: unrecognized error %d, exiting\n", | |
0dc47877 | 778 | __func__, status); |
1da177e4 LT |
779 | break; |
780 | } | |
781 | rpc_exit(task, status); | |
782 | } | |
783 | ||
784 | /* | |
785 | * 2. Allocate the buffer. For details, see sched.c:rpc_malloc. | |
02107148 | 786 | * (Note: buffer memory is freed in xprt_release). |
1da177e4 LT |
787 | */ |
788 | static void | |
789 | call_allocate(struct rpc_task *task) | |
790 | { | |
1be27f36 | 791 | unsigned int slack = task->tk_msg.rpc_cred->cr_auth->au_cslack; |
02107148 CL |
792 | struct rpc_rqst *req = task->tk_rqstp; |
793 | struct rpc_xprt *xprt = task->tk_xprt; | |
2bea90d4 | 794 | struct rpc_procinfo *proc = task->tk_msg.rpc_proc; |
1da177e4 | 795 | |
46121cf7 CL |
796 | dprint_status(task); |
797 | ||
2bea90d4 | 798 | task->tk_status = 0; |
1da177e4 | 799 | task->tk_action = call_bind; |
2bea90d4 | 800 | |
02107148 | 801 | if (req->rq_buffer) |
1da177e4 LT |
802 | return; |
803 | ||
2bea90d4 CL |
804 | if (proc->p_proc != 0) { |
805 | BUG_ON(proc->p_arglen == 0); | |
806 | if (proc->p_decode != NULL) | |
807 | BUG_ON(proc->p_replen == 0); | |
808 | } | |
1da177e4 | 809 | |
2bea90d4 CL |
810 | /* |
811 | * Calculate the size (in quads) of the RPC call | |
812 | * and reply headers, and convert both values | |
813 | * to byte sizes. | |
814 | */ | |
815 | req->rq_callsize = RPC_CALLHDRSIZE + (slack << 1) + proc->p_arglen; | |
816 | req->rq_callsize <<= 2; | |
817 | req->rq_rcvsize = RPC_REPHDRSIZE + slack + proc->p_replen; | |
818 | req->rq_rcvsize <<= 2; | |
819 | ||
c5a4dd8b CL |
820 | req->rq_buffer = xprt->ops->buf_alloc(task, |
821 | req->rq_callsize + req->rq_rcvsize); | |
2bea90d4 | 822 | if (req->rq_buffer != NULL) |
1da177e4 | 823 | return; |
46121cf7 CL |
824 | |
825 | dprintk("RPC: %5u rpc_buffer allocation failed\n", task->tk_pid); | |
1da177e4 | 826 | |
14b218a8 | 827 | if (RPC_IS_ASYNC(task) || !signalled()) { |
b6e9c713 | 828 | task->tk_action = call_allocate; |
1da177e4 LT |
829 | rpc_delay(task, HZ>>4); |
830 | return; | |
831 | } | |
832 | ||
833 | rpc_exit(task, -ERESTARTSYS); | |
834 | } | |
835 | ||
940e3318 TM |
836 | static inline int |
837 | rpc_task_need_encode(struct rpc_task *task) | |
838 | { | |
839 | return task->tk_rqstp->rq_snd_buf.len == 0; | |
840 | } | |
841 | ||
842 | static inline void | |
843 | rpc_task_force_reencode(struct rpc_task *task) | |
844 | { | |
845 | task->tk_rqstp->rq_snd_buf.len = 0; | |
846 | } | |
847 | ||
2bea90d4 CL |
848 | static inline void |
849 | rpc_xdr_buf_init(struct xdr_buf *buf, void *start, size_t len) | |
850 | { | |
851 | buf->head[0].iov_base = start; | |
852 | buf->head[0].iov_len = len; | |
853 | buf->tail[0].iov_len = 0; | |
854 | buf->page_len = 0; | |
4f22ccc3 | 855 | buf->flags = 0; |
2bea90d4 CL |
856 | buf->len = 0; |
857 | buf->buflen = len; | |
858 | } | |
859 | ||
1da177e4 LT |
860 | /* |
861 | * 3. Encode arguments of an RPC call | |
862 | */ | |
863 | static void | |
864 | call_encode(struct rpc_task *task) | |
865 | { | |
1da177e4 | 866 | struct rpc_rqst *req = task->tk_rqstp; |
1da177e4 | 867 | kxdrproc_t encode; |
d8ed029d | 868 | __be32 *p; |
1da177e4 | 869 | |
46121cf7 | 870 | dprint_status(task); |
1da177e4 | 871 | |
2bea90d4 CL |
872 | rpc_xdr_buf_init(&req->rq_snd_buf, |
873 | req->rq_buffer, | |
874 | req->rq_callsize); | |
875 | rpc_xdr_buf_init(&req->rq_rcv_buf, | |
876 | (char *)req->rq_buffer + req->rq_callsize, | |
877 | req->rq_rcvsize); | |
1da177e4 LT |
878 | |
879 | /* Encode header and provided arguments */ | |
880 | encode = task->tk_msg.rpc_proc->p_encode; | |
881 | if (!(p = call_header(task))) { | |
882 | printk(KERN_INFO "RPC: call_header failed, exit EIO\n"); | |
883 | rpc_exit(task, -EIO); | |
884 | return; | |
885 | } | |
f3680312 BF |
886 | if (encode == NULL) |
887 | return; | |
888 | ||
889 | task->tk_status = rpcauth_wrap_req(task, encode, req, p, | |
890 | task->tk_msg.rpc_argp); | |
891 | if (task->tk_status == -ENOMEM) { | |
892 | /* XXX: Is this sane? */ | |
893 | rpc_delay(task, 3*HZ); | |
894 | task->tk_status = -EAGAIN; | |
895 | } | |
1da177e4 LT |
896 | } |
897 | ||
898 | /* | |
899 | * 4. Get the server port number if not yet set | |
900 | */ | |
901 | static void | |
902 | call_bind(struct rpc_task *task) | |
903 | { | |
ec739ef0 | 904 | struct rpc_xprt *xprt = task->tk_xprt; |
1da177e4 | 905 | |
46121cf7 | 906 | dprint_status(task); |
1da177e4 | 907 | |
da351878 | 908 | task->tk_action = call_connect; |
ec739ef0 | 909 | if (!xprt_bound(xprt)) { |
da351878 | 910 | task->tk_action = call_bind_status; |
ec739ef0 | 911 | task->tk_timeout = xprt->bind_timeout; |
bbf7c1dd | 912 | xprt->ops->rpcbind(task); |
1da177e4 LT |
913 | } |
914 | } | |
915 | ||
916 | /* | |
da351878 CL |
917 | * 4a. Sort out bind result |
918 | */ | |
919 | static void | |
920 | call_bind_status(struct rpc_task *task) | |
921 | { | |
906462af | 922 | int status = -EIO; |
da351878 CL |
923 | |
924 | if (task->tk_status >= 0) { | |
46121cf7 | 925 | dprint_status(task); |
da351878 CL |
926 | task->tk_status = 0; |
927 | task->tk_action = call_connect; | |
928 | return; | |
929 | } | |
930 | ||
931 | switch (task->tk_status) { | |
2429cbf6 CL |
932 | case -EAGAIN: |
933 | dprintk("RPC: %5u rpcbind waiting for another request " | |
934 | "to finish\n", task->tk_pid); | |
935 | /* avoid busy-waiting here -- could be a network outage. */ | |
936 | rpc_delay(task, 5*HZ); | |
937 | goto retry_timeout; | |
da351878 | 938 | case -EACCES: |
46121cf7 CL |
939 | dprintk("RPC: %5u remote rpcbind: RPC program/version " |
940 | "unavailable\n", task->tk_pid); | |
b79dc8ce CL |
941 | /* fail immediately if this is an RPC ping */ |
942 | if (task->tk_msg.rpc_proc->p_proc == 0) { | |
943 | status = -EOPNOTSUPP; | |
944 | break; | |
945 | } | |
ea635a51 | 946 | rpc_delay(task, 3*HZ); |
da45828e | 947 | goto retry_timeout; |
da351878 | 948 | case -ETIMEDOUT: |
46121cf7 | 949 | dprintk("RPC: %5u rpcbind request timed out\n", |
da351878 | 950 | task->tk_pid); |
da45828e | 951 | goto retry_timeout; |
da351878 | 952 | case -EPFNOSUPPORT: |
906462af | 953 | /* server doesn't support any rpcbind version we know of */ |
46121cf7 | 954 | dprintk("RPC: %5u remote rpcbind service unavailable\n", |
da351878 CL |
955 | task->tk_pid); |
956 | break; | |
957 | case -EPROTONOSUPPORT: | |
00a6e7bb | 958 | dprintk("RPC: %5u remote rpcbind version unavailable, retrying\n", |
da351878 | 959 | task->tk_pid); |
00a6e7bb CL |
960 | task->tk_status = 0; |
961 | task->tk_action = call_bind; | |
962 | return; | |
da351878 | 963 | default: |
46121cf7 | 964 | dprintk("RPC: %5u unrecognized rpcbind error (%d)\n", |
da351878 | 965 | task->tk_pid, -task->tk_status); |
da351878 CL |
966 | } |
967 | ||
968 | rpc_exit(task, status); | |
969 | return; | |
970 | ||
da45828e TM |
971 | retry_timeout: |
972 | task->tk_action = call_timeout; | |
da351878 CL |
973 | } |
974 | ||
975 | /* | |
976 | * 4b. Connect to the RPC server | |
1da177e4 LT |
977 | */ |
978 | static void | |
979 | call_connect(struct rpc_task *task) | |
980 | { | |
da351878 | 981 | struct rpc_xprt *xprt = task->tk_xprt; |
1da177e4 | 982 | |
46121cf7 | 983 | dprintk("RPC: %5u call_connect xprt %p %s connected\n", |
da351878 CL |
984 | task->tk_pid, xprt, |
985 | (xprt_connected(xprt) ? "is" : "is not")); | |
1da177e4 | 986 | |
da351878 CL |
987 | task->tk_action = call_transmit; |
988 | if (!xprt_connected(xprt)) { | |
989 | task->tk_action = call_connect_status; | |
990 | if (task->tk_status < 0) | |
991 | return; | |
992 | xprt_connect(task); | |
1da177e4 | 993 | } |
1da177e4 LT |
994 | } |
995 | ||
996 | /* | |
da351878 | 997 | * 4c. Sort out connect result |
1da177e4 LT |
998 | */ |
999 | static void | |
1000 | call_connect_status(struct rpc_task *task) | |
1001 | { | |
1002 | struct rpc_clnt *clnt = task->tk_client; | |
1003 | int status = task->tk_status; | |
1004 | ||
46121cf7 | 1005 | dprint_status(task); |
da351878 | 1006 | |
1da177e4 LT |
1007 | task->tk_status = 0; |
1008 | if (status >= 0) { | |
1009 | clnt->cl_stats->netreconn++; | |
1010 | task->tk_action = call_transmit; | |
1011 | return; | |
1012 | } | |
1013 | ||
da351878 | 1014 | /* Something failed: remote service port may have changed */ |
35f5a422 | 1015 | rpc_force_rebind(clnt); |
da351878 | 1016 | |
1da177e4 LT |
1017 | switch (status) { |
1018 | case -ENOTCONN: | |
1da177e4 | 1019 | case -EAGAIN: |
da351878 | 1020 | task->tk_action = call_bind; |
da45828e TM |
1021 | if (!RPC_IS_SOFT(task)) |
1022 | return; | |
1023 | /* if soft mounted, test if we've timed out */ | |
1024 | case -ETIMEDOUT: | |
1025 | task->tk_action = call_timeout; | |
1026 | return; | |
1da177e4 | 1027 | } |
da45828e | 1028 | rpc_exit(task, -EIO); |
1da177e4 LT |
1029 | } |
1030 | ||
1031 | /* | |
1032 | * 5. Transmit the RPC request, and wait for reply | |
1033 | */ | |
1034 | static void | |
1035 | call_transmit(struct rpc_task *task) | |
1036 | { | |
46121cf7 | 1037 | dprint_status(task); |
1da177e4 LT |
1038 | |
1039 | task->tk_action = call_status; | |
1040 | if (task->tk_status < 0) | |
1041 | return; | |
1042 | task->tk_status = xprt_prepare_transmit(task); | |
1043 | if (task->tk_status != 0) | |
1044 | return; | |
e0ab53de | 1045 | task->tk_action = call_transmit_status; |
1da177e4 | 1046 | /* Encode here so that rpcsec_gss can use correct sequence number. */ |
940e3318 | 1047 | if (rpc_task_need_encode(task)) { |
e0ab53de | 1048 | BUG_ON(task->tk_rqstp->rq_bytes_sent != 0); |
1da177e4 | 1049 | call_encode(task); |
5e5ce5be TM |
1050 | /* Did the encode result in an error condition? */ |
1051 | if (task->tk_status != 0) | |
e0ab53de | 1052 | return; |
5e5ce5be | 1053 | } |
1da177e4 LT |
1054 | xprt_transmit(task); |
1055 | if (task->tk_status < 0) | |
1056 | return; | |
e0ab53de TM |
1057 | /* |
1058 | * On success, ensure that we call xprt_end_transmit() before sleeping | |
1059 | * in order to allow access to the socket to other RPC requests. | |
1060 | */ | |
1061 | call_transmit_status(task); | |
1062 | if (task->tk_msg.rpc_proc->p_decode != NULL) | |
1063 | return; | |
1064 | task->tk_action = rpc_exit_task; | |
fda13939 | 1065 | rpc_wake_up_queued_task(&task->tk_xprt->pending, task); |
e0ab53de TM |
1066 | } |
1067 | ||
1068 | /* | |
1069 | * 5a. Handle cleanup after a transmission | |
1070 | */ | |
1071 | static void | |
1072 | call_transmit_status(struct rpc_task *task) | |
1073 | { | |
1074 | task->tk_action = call_status; | |
1075 | /* | |
1076 | * Special case: if we've been waiting on the socket's write_space() | |
1077 | * callback, then don't call xprt_end_transmit(). | |
1078 | */ | |
1079 | if (task->tk_status == -EAGAIN) | |
1080 | return; | |
1081 | xprt_end_transmit(task); | |
940e3318 | 1082 | rpc_task_force_reencode(task); |
1da177e4 LT |
1083 | } |
1084 | ||
1085 | /* | |
1086 | * 6. Sort out the RPC call status | |
1087 | */ | |
1088 | static void | |
1089 | call_status(struct rpc_task *task) | |
1090 | { | |
1091 | struct rpc_clnt *clnt = task->tk_client; | |
1092 | struct rpc_rqst *req = task->tk_rqstp; | |
1093 | int status; | |
1094 | ||
1095 | if (req->rq_received > 0 && !req->rq_bytes_sent) | |
1096 | task->tk_status = req->rq_received; | |
1097 | ||
46121cf7 | 1098 | dprint_status(task); |
1da177e4 LT |
1099 | |
1100 | status = task->tk_status; | |
1101 | if (status >= 0) { | |
1102 | task->tk_action = call_decode; | |
1103 | return; | |
1104 | } | |
1105 | ||
1106 | task->tk_status = 0; | |
1107 | switch(status) { | |
76303992 TM |
1108 | case -EHOSTDOWN: |
1109 | case -EHOSTUNREACH: | |
1110 | case -ENETUNREACH: | |
1111 | /* | |
1112 | * Delay any retries for 3 seconds, then handle as if it | |
1113 | * were a timeout. | |
1114 | */ | |
1115 | rpc_delay(task, 3*HZ); | |
1da177e4 LT |
1116 | case -ETIMEDOUT: |
1117 | task->tk_action = call_timeout; | |
241c39b9 | 1118 | if (task->tk_client->cl_discrtry) |
7c1d71cf TM |
1119 | xprt_conditional_disconnect(task->tk_xprt, |
1120 | req->rq_connect_cookie); | |
1da177e4 LT |
1121 | break; |
1122 | case -ECONNREFUSED: | |
1123 | case -ENOTCONN: | |
35f5a422 | 1124 | rpc_force_rebind(clnt); |
1da177e4 LT |
1125 | task->tk_action = call_bind; |
1126 | break; | |
1127 | case -EAGAIN: | |
1128 | task->tk_action = call_transmit; | |
1129 | break; | |
1130 | case -EIO: | |
1131 | /* shutdown or soft timeout */ | |
1132 | rpc_exit(task, status); | |
1133 | break; | |
1134 | default: | |
f518e35a | 1135 | printk("%s: RPC call returned error %d\n", |
1da177e4 LT |
1136 | clnt->cl_protname, -status); |
1137 | rpc_exit(task, status); | |
1da177e4 LT |
1138 | } |
1139 | } | |
1140 | ||
1141 | /* | |
e0ab53de | 1142 | * 6a. Handle RPC timeout |
1da177e4 LT |
1143 | * We do not release the request slot, so we keep using the |
1144 | * same XID for all retransmits. | |
1145 | */ | |
1146 | static void | |
1147 | call_timeout(struct rpc_task *task) | |
1148 | { | |
1149 | struct rpc_clnt *clnt = task->tk_client; | |
1150 | ||
1151 | if (xprt_adjust_timeout(task->tk_rqstp) == 0) { | |
46121cf7 | 1152 | dprintk("RPC: %5u call_timeout (minor)\n", task->tk_pid); |
1da177e4 LT |
1153 | goto retry; |
1154 | } | |
1155 | ||
46121cf7 | 1156 | dprintk("RPC: %5u call_timeout (major)\n", task->tk_pid); |
ef759a2e CL |
1157 | task->tk_timeouts++; |
1158 | ||
1da177e4 | 1159 | if (RPC_IS_SOFT(task)) { |
f518e35a | 1160 | printk(KERN_NOTICE "%s: server %s not responding, timed out\n", |
1da177e4 LT |
1161 | clnt->cl_protname, clnt->cl_server); |
1162 | rpc_exit(task, -EIO); | |
1163 | return; | |
1164 | } | |
1165 | ||
f518e35a | 1166 | if (!(task->tk_flags & RPC_CALL_MAJORSEEN)) { |
1da177e4 LT |
1167 | task->tk_flags |= RPC_CALL_MAJORSEEN; |
1168 | printk(KERN_NOTICE "%s: server %s not responding, still trying\n", | |
1169 | clnt->cl_protname, clnt->cl_server); | |
1170 | } | |
35f5a422 | 1171 | rpc_force_rebind(clnt); |
b48633bd TM |
1172 | /* |
1173 | * Did our request time out due to an RPCSEC_GSS out-of-sequence | |
1174 | * event? RFC2203 requires the server to drop all such requests. | |
1175 | */ | |
1176 | rpcauth_invalcred(task); | |
1da177e4 LT |
1177 | |
1178 | retry: | |
1179 | clnt->cl_stats->rpcretrans++; | |
1180 | task->tk_action = call_bind; | |
1181 | task->tk_status = 0; | |
1182 | } | |
1183 | ||
1184 | /* | |
1185 | * 7. Decode the RPC reply | |
1186 | */ | |
1187 | static void | |
1188 | call_decode(struct rpc_task *task) | |
1189 | { | |
1190 | struct rpc_clnt *clnt = task->tk_client; | |
1191 | struct rpc_rqst *req = task->tk_rqstp; | |
1192 | kxdrproc_t decode = task->tk_msg.rpc_proc->p_decode; | |
d8ed029d | 1193 | __be32 *p; |
1da177e4 | 1194 | |
46121cf7 CL |
1195 | dprintk("RPC: %5u call_decode (status %d)\n", |
1196 | task->tk_pid, task->tk_status); | |
1da177e4 | 1197 | |
f518e35a | 1198 | if (task->tk_flags & RPC_CALL_MAJORSEEN) { |
1da177e4 LT |
1199 | printk(KERN_NOTICE "%s: server %s OK\n", |
1200 | clnt->cl_protname, clnt->cl_server); | |
1201 | task->tk_flags &= ~RPC_CALL_MAJORSEEN; | |
1202 | } | |
1203 | ||
43ac3f29 TM |
1204 | /* |
1205 | * Ensure that we see all writes made by xprt_complete_rqst() | |
1206 | * before it changed req->rq_received. | |
1207 | */ | |
1208 | smp_rmb(); | |
1da177e4 LT |
1209 | req->rq_rcv_buf.len = req->rq_private_buf.len; |
1210 | ||
1211 | /* Check that the softirq receive buffer is valid */ | |
1212 | WARN_ON(memcmp(&req->rq_rcv_buf, &req->rq_private_buf, | |
1213 | sizeof(req->rq_rcv_buf)) != 0); | |
1214 | ||
1e799b67 TM |
1215 | if (req->rq_rcv_buf.len < 12) { |
1216 | if (!RPC_IS_SOFT(task)) { | |
1217 | task->tk_action = call_bind; | |
1218 | clnt->cl_stats->rpcretrans++; | |
1219 | goto out_retry; | |
1220 | } | |
1221 | dprintk("RPC: %s: too small RPC reply size (%d bytes)\n", | |
1222 | clnt->cl_protname, task->tk_status); | |
1223 | task->tk_action = call_timeout; | |
1224 | goto out_retry; | |
1225 | } | |
1226 | ||
1da177e4 | 1227 | /* Verify the RPC header */ |
abbcf28f TM |
1228 | p = call_verify(task); |
1229 | if (IS_ERR(p)) { | |
1230 | if (p == ERR_PTR(-EAGAIN)) | |
1231 | goto out_retry; | |
1232 | return; | |
1da177e4 LT |
1233 | } |
1234 | ||
abbcf28f | 1235 | task->tk_action = rpc_exit_task; |
1da177e4 | 1236 | |
6d5fcb5a | 1237 | if (decode) { |
1da177e4 LT |
1238 | task->tk_status = rpcauth_unwrap_resp(task, decode, req, p, |
1239 | task->tk_msg.rpc_resp); | |
6d5fcb5a | 1240 | } |
46121cf7 CL |
1241 | dprintk("RPC: %5u call_decode result %d\n", task->tk_pid, |
1242 | task->tk_status); | |
1da177e4 LT |
1243 | return; |
1244 | out_retry: | |
1da177e4 | 1245 | task->tk_status = 0; |
24b74bf0 TM |
1246 | /* Note: call_verify() may have freed the RPC slot */ |
1247 | if (task->tk_rqstp == req) { | |
1e799b67 | 1248 | req->rq_received = req->rq_rcv_buf.len = 0; |
24b74bf0 | 1249 | if (task->tk_client->cl_discrtry) |
7c1d71cf TM |
1250 | xprt_conditional_disconnect(task->tk_xprt, |
1251 | req->rq_connect_cookie); | |
24b74bf0 | 1252 | } |
1da177e4 LT |
1253 | } |
1254 | ||
1255 | /* | |
1256 | * 8. Refresh the credentials if rejected by the server | |
1257 | */ | |
1258 | static void | |
1259 | call_refresh(struct rpc_task *task) | |
1260 | { | |
46121cf7 | 1261 | dprint_status(task); |
1da177e4 | 1262 | |
1da177e4 LT |
1263 | task->tk_action = call_refreshresult; |
1264 | task->tk_status = 0; | |
1265 | task->tk_client->cl_stats->rpcauthrefresh++; | |
1266 | rpcauth_refreshcred(task); | |
1267 | } | |
1268 | ||
1269 | /* | |
1270 | * 8a. Process the results of a credential refresh | |
1271 | */ | |
1272 | static void | |
1273 | call_refreshresult(struct rpc_task *task) | |
1274 | { | |
1275 | int status = task->tk_status; | |
46121cf7 CL |
1276 | |
1277 | dprint_status(task); | |
1da177e4 LT |
1278 | |
1279 | task->tk_status = 0; | |
1280 | task->tk_action = call_reserve; | |
1281 | if (status >= 0 && rpcauth_uptodatecred(task)) | |
1282 | return; | |
1283 | if (status == -EACCES) { | |
1284 | rpc_exit(task, -EACCES); | |
1285 | return; | |
1286 | } | |
1287 | task->tk_action = call_refresh; | |
1288 | if (status != -ETIMEDOUT) | |
1289 | rpc_delay(task, 3*HZ); | |
1290 | return; | |
1291 | } | |
1292 | ||
1293 | /* | |
1294 | * Call header serialization | |
1295 | */ | |
d8ed029d | 1296 | static __be32 * |
1da177e4 LT |
1297 | call_header(struct rpc_task *task) |
1298 | { | |
1299 | struct rpc_clnt *clnt = task->tk_client; | |
1da177e4 | 1300 | struct rpc_rqst *req = task->tk_rqstp; |
d8ed029d | 1301 | __be32 *p = req->rq_svec[0].iov_base; |
1da177e4 LT |
1302 | |
1303 | /* FIXME: check buffer size? */ | |
808012fb CL |
1304 | |
1305 | p = xprt_skip_transport_header(task->tk_xprt, p); | |
1da177e4 LT |
1306 | *p++ = req->rq_xid; /* XID */ |
1307 | *p++ = htonl(RPC_CALL); /* CALL */ | |
1308 | *p++ = htonl(RPC_VERSION); /* RPC version */ | |
1309 | *p++ = htonl(clnt->cl_prog); /* program number */ | |
1310 | *p++ = htonl(clnt->cl_vers); /* program version */ | |
1311 | *p++ = htonl(task->tk_msg.rpc_proc->p_proc); /* procedure */ | |
334ccfd5 TM |
1312 | p = rpcauth_marshcred(task, p); |
1313 | req->rq_slen = xdr_adjust_iovec(&req->rq_svec[0], p); | |
1314 | return p; | |
1da177e4 LT |
1315 | } |
1316 | ||
1317 | /* | |
1318 | * Reply header verification | |
1319 | */ | |
d8ed029d | 1320 | static __be32 * |
1da177e4 LT |
1321 | call_verify(struct rpc_task *task) |
1322 | { | |
1323 | struct kvec *iov = &task->tk_rqstp->rq_rcv_buf.head[0]; | |
1324 | int len = task->tk_rqstp->rq_rcv_buf.len >> 2; | |
d8ed029d AD |
1325 | __be32 *p = iov->iov_base; |
1326 | u32 n; | |
1da177e4 LT |
1327 | int error = -EACCES; |
1328 | ||
e8896495 DH |
1329 | if ((task->tk_rqstp->rq_rcv_buf.len & 3) != 0) { |
1330 | /* RFC-1014 says that the representation of XDR data must be a | |
1331 | * multiple of four bytes | |
1332 | * - if it isn't pointer subtraction in the NFS client may give | |
1333 | * undefined results | |
1334 | */ | |
8a702bbb | 1335 | dprintk("RPC: %5u %s: XDR representation not a multiple of" |
0dc47877 | 1336 | " 4 bytes: 0x%x\n", task->tk_pid, __func__, |
8a702bbb | 1337 | task->tk_rqstp->rq_rcv_buf.len); |
e8896495 DH |
1338 | goto out_eio; |
1339 | } | |
1da177e4 LT |
1340 | if ((len -= 3) < 0) |
1341 | goto out_overflow; | |
1342 | p += 1; /* skip XID */ | |
1343 | ||
1344 | if ((n = ntohl(*p++)) != RPC_REPLY) { | |
8a702bbb | 1345 | dprintk("RPC: %5u %s: not an RPC reply: %x\n", |
0dc47877 | 1346 | task->tk_pid, __func__, n); |
abbcf28f | 1347 | goto out_garbage; |
1da177e4 LT |
1348 | } |
1349 | if ((n = ntohl(*p++)) != RPC_MSG_ACCEPTED) { | |
1350 | if (--len < 0) | |
1351 | goto out_overflow; | |
1352 | switch ((n = ntohl(*p++))) { | |
1353 | case RPC_AUTH_ERROR: | |
1354 | break; | |
1355 | case RPC_MISMATCH: | |
46121cf7 CL |
1356 | dprintk("RPC: %5u %s: RPC call version " |
1357 | "mismatch!\n", | |
0dc47877 | 1358 | task->tk_pid, __func__); |
cdf47706 AG |
1359 | error = -EPROTONOSUPPORT; |
1360 | goto out_err; | |
1da177e4 | 1361 | default: |
46121cf7 CL |
1362 | dprintk("RPC: %5u %s: RPC call rejected, " |
1363 | "unknown error: %x\n", | |
0dc47877 | 1364 | task->tk_pid, __func__, n); |
1da177e4 LT |
1365 | goto out_eio; |
1366 | } | |
1367 | if (--len < 0) | |
1368 | goto out_overflow; | |
1369 | switch ((n = ntohl(*p++))) { | |
1370 | case RPC_AUTH_REJECTEDCRED: | |
1371 | case RPC_AUTH_REJECTEDVERF: | |
1372 | case RPCSEC_GSS_CREDPROBLEM: | |
1373 | case RPCSEC_GSS_CTXPROBLEM: | |
1374 | if (!task->tk_cred_retry) | |
1375 | break; | |
1376 | task->tk_cred_retry--; | |
46121cf7 | 1377 | dprintk("RPC: %5u %s: retry stale creds\n", |
0dc47877 | 1378 | task->tk_pid, __func__); |
1da177e4 | 1379 | rpcauth_invalcred(task); |
220bcc2a TM |
1380 | /* Ensure we obtain a new XID! */ |
1381 | xprt_release(task); | |
1da177e4 | 1382 | task->tk_action = call_refresh; |
abbcf28f | 1383 | goto out_retry; |
1da177e4 LT |
1384 | case RPC_AUTH_BADCRED: |
1385 | case RPC_AUTH_BADVERF: | |
1386 | /* possibly garbled cred/verf? */ | |
1387 | if (!task->tk_garb_retry) | |
1388 | break; | |
1389 | task->tk_garb_retry--; | |
46121cf7 | 1390 | dprintk("RPC: %5u %s: retry garbled creds\n", |
0dc47877 | 1391 | task->tk_pid, __func__); |
1da177e4 | 1392 | task->tk_action = call_bind; |
abbcf28f | 1393 | goto out_retry; |
1da177e4 | 1394 | case RPC_AUTH_TOOWEAK: |
1356b8c2 LS |
1395 | printk(KERN_NOTICE "call_verify: server %s requires stronger " |
1396 | "authentication.\n", task->tk_client->cl_server); | |
1da177e4 LT |
1397 | break; |
1398 | default: | |
8a702bbb | 1399 | dprintk("RPC: %5u %s: unknown auth error: %x\n", |
0dc47877 | 1400 | task->tk_pid, __func__, n); |
1da177e4 LT |
1401 | error = -EIO; |
1402 | } | |
46121cf7 | 1403 | dprintk("RPC: %5u %s: call rejected %d\n", |
0dc47877 | 1404 | task->tk_pid, __func__, n); |
1da177e4 LT |
1405 | goto out_err; |
1406 | } | |
1407 | if (!(p = rpcauth_checkverf(task, p))) { | |
8a702bbb | 1408 | dprintk("RPC: %5u %s: auth check failed\n", |
0dc47877 | 1409 | task->tk_pid, __func__); |
abbcf28f | 1410 | goto out_garbage; /* bad verifier, retry */ |
1da177e4 | 1411 | } |
d8ed029d | 1412 | len = p - (__be32 *)iov->iov_base - 1; |
1da177e4 LT |
1413 | if (len < 0) |
1414 | goto out_overflow; | |
1415 | switch ((n = ntohl(*p++))) { | |
1416 | case RPC_SUCCESS: | |
1417 | return p; | |
1418 | case RPC_PROG_UNAVAIL: | |
46121cf7 | 1419 | dprintk("RPC: %5u %s: program %u is unsupported by server %s\n", |
0dc47877 | 1420 | task->tk_pid, __func__, |
1da177e4 LT |
1421 | (unsigned int)task->tk_client->cl_prog, |
1422 | task->tk_client->cl_server); | |
cdf47706 AG |
1423 | error = -EPFNOSUPPORT; |
1424 | goto out_err; | |
1da177e4 | 1425 | case RPC_PROG_MISMATCH: |
46121cf7 | 1426 | dprintk("RPC: %5u %s: program %u, version %u unsupported by " |
0dc47877 | 1427 | "server %s\n", task->tk_pid, __func__, |
1da177e4 LT |
1428 | (unsigned int)task->tk_client->cl_prog, |
1429 | (unsigned int)task->tk_client->cl_vers, | |
1430 | task->tk_client->cl_server); | |
cdf47706 AG |
1431 | error = -EPROTONOSUPPORT; |
1432 | goto out_err; | |
1da177e4 | 1433 | case RPC_PROC_UNAVAIL: |
46121cf7 CL |
1434 | dprintk("RPC: %5u %s: proc %p unsupported by program %u, " |
1435 | "version %u on server %s\n", | |
0dc47877 | 1436 | task->tk_pid, __func__, |
1da177e4 LT |
1437 | task->tk_msg.rpc_proc, |
1438 | task->tk_client->cl_prog, | |
1439 | task->tk_client->cl_vers, | |
1440 | task->tk_client->cl_server); | |
cdf47706 AG |
1441 | error = -EOPNOTSUPP; |
1442 | goto out_err; | |
1da177e4 | 1443 | case RPC_GARBAGE_ARGS: |
46121cf7 | 1444 | dprintk("RPC: %5u %s: server saw garbage\n", |
0dc47877 | 1445 | task->tk_pid, __func__); |
1da177e4 LT |
1446 | break; /* retry */ |
1447 | default: | |
8a702bbb | 1448 | dprintk("RPC: %5u %s: server accept status: %x\n", |
0dc47877 | 1449 | task->tk_pid, __func__, n); |
1da177e4 LT |
1450 | /* Also retry */ |
1451 | } | |
1452 | ||
abbcf28f | 1453 | out_garbage: |
1da177e4 LT |
1454 | task->tk_client->cl_stats->rpcgarbage++; |
1455 | if (task->tk_garb_retry) { | |
1456 | task->tk_garb_retry--; | |
46121cf7 | 1457 | dprintk("RPC: %5u %s: retrying\n", |
0dc47877 | 1458 | task->tk_pid, __func__); |
1da177e4 | 1459 | task->tk_action = call_bind; |
abbcf28f TM |
1460 | out_retry: |
1461 | return ERR_PTR(-EAGAIN); | |
1da177e4 | 1462 | } |
1da177e4 LT |
1463 | out_eio: |
1464 | error = -EIO; | |
1465 | out_err: | |
1466 | rpc_exit(task, error); | |
8a702bbb | 1467 | dprintk("RPC: %5u %s: call failed with error %d\n", task->tk_pid, |
0dc47877 | 1468 | __func__, error); |
abbcf28f | 1469 | return ERR_PTR(error); |
1da177e4 | 1470 | out_overflow: |
8a702bbb | 1471 | dprintk("RPC: %5u %s: server reply was truncated.\n", task->tk_pid, |
0dc47877 | 1472 | __func__); |
abbcf28f | 1473 | goto out_garbage; |
1da177e4 | 1474 | } |
5ee0ed7d | 1475 | |
d8ed029d | 1476 | static int rpcproc_encode_null(void *rqstp, __be32 *data, void *obj) |
5ee0ed7d TM |
1477 | { |
1478 | return 0; | |
1479 | } | |
1480 | ||
d8ed029d | 1481 | static int rpcproc_decode_null(void *rqstp, __be32 *data, void *obj) |
5ee0ed7d TM |
1482 | { |
1483 | return 0; | |
1484 | } | |
1485 | ||
1486 | static struct rpc_procinfo rpcproc_null = { | |
1487 | .p_encode = rpcproc_encode_null, | |
1488 | .p_decode = rpcproc_decode_null, | |
1489 | }; | |
1490 | ||
64c91a1f | 1491 | static int rpc_ping(struct rpc_clnt *clnt, int flags) |
5ee0ed7d TM |
1492 | { |
1493 | struct rpc_message msg = { | |
1494 | .rpc_proc = &rpcproc_null, | |
1495 | }; | |
1496 | int err; | |
1497 | msg.rpc_cred = authnull_ops.lookup_cred(NULL, NULL, 0); | |
1498 | err = rpc_call_sync(clnt, &msg, flags); | |
1499 | put_rpccred(msg.rpc_cred); | |
1500 | return err; | |
1501 | } | |
188fef11 | 1502 | |
5e1550d6 TM |
1503 | struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred, int flags) |
1504 | { | |
1505 | struct rpc_message msg = { | |
1506 | .rpc_proc = &rpcproc_null, | |
1507 | .rpc_cred = cred, | |
1508 | }; | |
84115e1c TM |
1509 | struct rpc_task_setup task_setup_data = { |
1510 | .rpc_client = clnt, | |
1511 | .rpc_message = &msg, | |
1512 | .callback_ops = &rpc_default_ops, | |
1513 | .flags = flags, | |
1514 | }; | |
c970aa85 | 1515 | return rpc_run_task(&task_setup_data); |
5e1550d6 | 1516 | } |
e8914c65 | 1517 | EXPORT_SYMBOL_GPL(rpc_call_null); |
5e1550d6 | 1518 | |
188fef11 TM |
1519 | #ifdef RPC_DEBUG |
1520 | void rpc_show_tasks(void) | |
1521 | { | |
1522 | struct rpc_clnt *clnt; | |
1523 | struct rpc_task *t; | |
1524 | ||
1525 | spin_lock(&rpc_client_lock); | |
1526 | if (list_empty(&all_clients)) | |
1527 | goto out; | |
1528 | printk("-pid- proc flgs status -client- -prog- --rqstp- -timeout " | |
1529 | "-rpcwait -action- ---ops--\n"); | |
1530 | list_for_each_entry(clnt, &all_clients, cl_clients) { | |
1531 | if (list_empty(&clnt->cl_tasks)) | |
1532 | continue; | |
1533 | spin_lock(&clnt->cl_lock); | |
1534 | list_for_each_entry(t, &clnt->cl_tasks, tk_task) { | |
1535 | const char *rpc_waitq = "none"; | |
d66968f2 CL |
1536 | int proc; |
1537 | ||
1538 | if (t->tk_msg.rpc_proc) | |
1539 | proc = t->tk_msg.rpc_proc->p_proc; | |
1540 | else | |
1541 | proc = -1; | |
188fef11 TM |
1542 | |
1543 | if (RPC_IS_QUEUED(t)) | |
96ef13b2 | 1544 | rpc_waitq = rpc_qname(t->tk_waitqueue); |
188fef11 TM |
1545 | |
1546 | printk("%5u %04d %04x %6d %8p %6d %8p %8ld %8s %8p %8p\n", | |
d66968f2 | 1547 | t->tk_pid, proc, |
188fef11 TM |
1548 | t->tk_flags, t->tk_status, |
1549 | t->tk_client, | |
1550 | (t->tk_client ? t->tk_client->cl_prog : 0), | |
1551 | t->tk_rqstp, t->tk_timeout, | |
1552 | rpc_waitq, | |
1553 | t->tk_action, t->tk_ops); | |
1554 | } | |
1555 | spin_unlock(&clnt->cl_lock); | |
1556 | } | |
1557 | out: | |
1558 | spin_unlock(&rpc_client_lock); | |
1559 | } | |
1560 | #endif |