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> |
1da177e4 LT |
33 | |
34 | #include <linux/sunrpc/clnt.h> | |
1da177e4 | 35 | #include <linux/sunrpc/rpc_pipe_fs.h> |
11c556b3 | 36 | #include <linux/sunrpc/metrics.h> |
1da177e4 LT |
37 | |
38 | ||
1da177e4 LT |
39 | #ifdef RPC_DEBUG |
40 | # define RPCDBG_FACILITY RPCDBG_CALL | |
41 | #endif | |
42 | ||
46121cf7 CL |
43 | #define dprint_status(t) \ |
44 | dprintk("RPC: %5u %s (status %d)\n", t->tk_pid, \ | |
45 | __FUNCTION__, t->tk_status) | |
46 | ||
188fef11 TM |
47 | /* |
48 | * All RPC clients are linked into this list | |
49 | */ | |
50 | static LIST_HEAD(all_clients); | |
51 | static DEFINE_SPINLOCK(rpc_client_lock); | |
52 | ||
1da177e4 LT |
53 | static DECLARE_WAIT_QUEUE_HEAD(destroy_wait); |
54 | ||
55 | ||
56 | static void call_start(struct rpc_task *task); | |
57 | static void call_reserve(struct rpc_task *task); | |
58 | static void call_reserveresult(struct rpc_task *task); | |
59 | static void call_allocate(struct rpc_task *task); | |
60 | static void call_encode(struct rpc_task *task); | |
61 | static void call_decode(struct rpc_task *task); | |
62 | static void call_bind(struct rpc_task *task); | |
da351878 | 63 | static void call_bind_status(struct rpc_task *task); |
1da177e4 LT |
64 | static void call_transmit(struct rpc_task *task); |
65 | static void call_status(struct rpc_task *task); | |
940e3318 | 66 | static void call_transmit_status(struct rpc_task *task); |
1da177e4 LT |
67 | static void call_refresh(struct rpc_task *task); |
68 | static void call_refreshresult(struct rpc_task *task); | |
69 | static void call_timeout(struct rpc_task *task); | |
70 | static void call_connect(struct rpc_task *task); | |
71 | static void call_connect_status(struct rpc_task *task); | |
d8ed029d AD |
72 | static __be32 * call_header(struct rpc_task *task); |
73 | static __be32 * call_verify(struct rpc_task *task); | |
1da177e4 | 74 | |
64c91a1f TM |
75 | static int rpc_ping(struct rpc_clnt *clnt, int flags); |
76 | ||
188fef11 TM |
77 | static void rpc_register_client(struct rpc_clnt *clnt) |
78 | { | |
79 | spin_lock(&rpc_client_lock); | |
80 | list_add(&clnt->cl_clients, &all_clients); | |
81 | spin_unlock(&rpc_client_lock); | |
82 | } | |
83 | ||
84 | static void rpc_unregister_client(struct rpc_clnt *clnt) | |
85 | { | |
86 | spin_lock(&rpc_client_lock); | |
87 | list_del(&clnt->cl_clients); | |
88 | spin_unlock(&rpc_client_lock); | |
89 | } | |
1da177e4 LT |
90 | |
91 | static int | |
92 | rpc_setup_pipedir(struct rpc_clnt *clnt, char *dir_name) | |
93 | { | |
f134585a | 94 | static uint32_t clntid; |
1da177e4 LT |
95 | int error; |
96 | ||
54281548 TM |
97 | clnt->cl_vfsmnt = ERR_PTR(-ENOENT); |
98 | clnt->cl_dentry = ERR_PTR(-ENOENT); | |
1da177e4 LT |
99 | if (dir_name == NULL) |
100 | return 0; | |
54281548 TM |
101 | |
102 | clnt->cl_vfsmnt = rpc_get_mount(); | |
103 | if (IS_ERR(clnt->cl_vfsmnt)) | |
104 | return PTR_ERR(clnt->cl_vfsmnt); | |
105 | ||
f134585a TM |
106 | for (;;) { |
107 | snprintf(clnt->cl_pathname, sizeof(clnt->cl_pathname), | |
108 | "%s/clnt%x", dir_name, | |
109 | (unsigned int)clntid++); | |
110 | clnt->cl_pathname[sizeof(clnt->cl_pathname) - 1] = '\0'; | |
111 | clnt->cl_dentry = rpc_mkdir(clnt->cl_pathname, clnt); | |
112 | if (!IS_ERR(clnt->cl_dentry)) | |
113 | return 0; | |
1da177e4 | 114 | error = PTR_ERR(clnt->cl_dentry); |
f134585a TM |
115 | if (error != -EEXIST) { |
116 | printk(KERN_INFO "RPC: Couldn't create pipefs entry %s, error %d\n", | |
117 | clnt->cl_pathname, error); | |
54281548 | 118 | rpc_put_mount(); |
f134585a TM |
119 | return error; |
120 | } | |
1da177e4 LT |
121 | } |
122 | } | |
123 | ||
ff9aa5e5 | 124 | static struct rpc_clnt * rpc_new_client(struct rpc_xprt *xprt, char *servname, struct rpc_program *program, u32 vers, rpc_authflavor_t flavor) |
1da177e4 LT |
125 | { |
126 | struct rpc_version *version; | |
127 | struct rpc_clnt *clnt = NULL; | |
6a19275a | 128 | struct rpc_auth *auth; |
1da177e4 LT |
129 | int err; |
130 | int len; | |
131 | ||
46121cf7 CL |
132 | dprintk("RPC: creating %s client for %s (xprt %p)\n", |
133 | program->name, servname, xprt); | |
1da177e4 | 134 | |
4ada539e TM |
135 | err = rpciod_up(); |
136 | if (err) | |
137 | goto out_no_rpciod; | |
1da177e4 LT |
138 | err = -EINVAL; |
139 | if (!xprt) | |
712917d1 | 140 | goto out_no_xprt; |
1da177e4 LT |
141 | if (vers >= program->nrvers || !(version = program->version[vers])) |
142 | goto out_err; | |
143 | ||
144 | err = -ENOMEM; | |
0da974f4 | 145 | clnt = kzalloc(sizeof(*clnt), GFP_KERNEL); |
1da177e4 LT |
146 | if (!clnt) |
147 | goto out_err; | |
1da177e4 LT |
148 | clnt->cl_parent = clnt; |
149 | ||
150 | clnt->cl_server = clnt->cl_inline_name; | |
151 | len = strlen(servname) + 1; | |
152 | if (len > sizeof(clnt->cl_inline_name)) { | |
153 | char *buf = kmalloc(len, GFP_KERNEL); | |
154 | if (buf != 0) | |
155 | clnt->cl_server = buf; | |
156 | else | |
157 | len = sizeof(clnt->cl_inline_name); | |
158 | } | |
159 | strlcpy(clnt->cl_server, servname, len); | |
160 | ||
161 | clnt->cl_xprt = xprt; | |
162 | clnt->cl_procinfo = version->procs; | |
163 | clnt->cl_maxproc = version->nrprocs; | |
164 | clnt->cl_protname = program->name; | |
1da177e4 LT |
165 | clnt->cl_prog = program->number; |
166 | clnt->cl_vers = version->number; | |
1da177e4 | 167 | clnt->cl_stats = program->stats; |
11c556b3 | 168 | clnt->cl_metrics = rpc_alloc_iostats(clnt); |
23bf85ba TM |
169 | err = -ENOMEM; |
170 | if (clnt->cl_metrics == NULL) | |
171 | goto out_no_stats; | |
3e32a5d9 | 172 | clnt->cl_program = program; |
6529eba0 | 173 | INIT_LIST_HEAD(&clnt->cl_tasks); |
4bef61ff | 174 | spin_lock_init(&clnt->cl_lock); |
1da177e4 | 175 | |
ec739ef0 | 176 | if (!xprt_bound(clnt->cl_xprt)) |
1da177e4 LT |
177 | clnt->cl_autobind = 1; |
178 | ||
179 | clnt->cl_rtt = &clnt->cl_rtt_default; | |
180 | rpc_init_rtt(&clnt->cl_rtt_default, xprt->timeout.to_initval); | |
181 | ||
34f52e35 TM |
182 | kref_init(&clnt->cl_kref); |
183 | ||
1da177e4 LT |
184 | err = rpc_setup_pipedir(clnt, program->pipe_dir_name); |
185 | if (err < 0) | |
186 | goto out_no_path; | |
187 | ||
6a19275a BF |
188 | auth = rpcauth_create(flavor, clnt); |
189 | if (IS_ERR(auth)) { | |
1da177e4 LT |
190 | printk(KERN_INFO "RPC: Couldn't create auth handle (flavor %u)\n", |
191 | flavor); | |
6a19275a | 192 | err = PTR_ERR(auth); |
1da177e4 LT |
193 | goto out_no_auth; |
194 | } | |
195 | ||
196 | /* save the nodename */ | |
e9ff3990 | 197 | clnt->cl_nodelen = strlen(utsname()->nodename); |
1da177e4 LT |
198 | if (clnt->cl_nodelen > UNX_MAXNODENAME) |
199 | clnt->cl_nodelen = UNX_MAXNODENAME; | |
e9ff3990 | 200 | memcpy(clnt->cl_nodename, utsname()->nodename, clnt->cl_nodelen); |
6529eba0 | 201 | rpc_register_client(clnt); |
1da177e4 LT |
202 | return clnt; |
203 | ||
204 | out_no_auth: | |
54281548 | 205 | if (!IS_ERR(clnt->cl_dentry)) { |
dff02cc1 | 206 | rpc_rmdir(clnt->cl_dentry); |
54281548 TM |
207 | rpc_put_mount(); |
208 | } | |
1da177e4 | 209 | out_no_path: |
23bf85ba TM |
210 | rpc_free_iostats(clnt->cl_metrics); |
211 | out_no_stats: | |
1da177e4 LT |
212 | if (clnt->cl_server != clnt->cl_inline_name) |
213 | kfree(clnt->cl_server); | |
214 | kfree(clnt); | |
215 | out_err: | |
6b6ca86b | 216 | xprt_put(xprt); |
712917d1 | 217 | out_no_xprt: |
4ada539e TM |
218 | rpciod_down(); |
219 | out_no_rpciod: | |
1da177e4 LT |
220 | return ERR_PTR(err); |
221 | } | |
222 | ||
c2866763 CL |
223 | /* |
224 | * rpc_create - create an RPC client and transport with one call | |
225 | * @args: rpc_clnt create argument structure | |
226 | * | |
227 | * Creates and initializes an RPC transport and an RPC client. | |
228 | * | |
229 | * It can ping the server in order to determine if it is up, and to see if | |
230 | * it supports this program and version. RPC_CLNT_CREATE_NOPING disables | |
231 | * this behavior so asynchronous tasks can also use rpc_create. | |
232 | */ | |
233 | struct rpc_clnt *rpc_create(struct rpc_create_args *args) | |
234 | { | |
235 | struct rpc_xprt *xprt; | |
236 | struct rpc_clnt *clnt; | |
96802a09 FM |
237 | struct rpc_xprtsock_create xprtargs = { |
238 | .proto = args->protocol, | |
d3bc9a1d | 239 | .srcaddr = args->saddress, |
96802a09 FM |
240 | .dstaddr = args->address, |
241 | .addrlen = args->addrsize, | |
242 | .timeout = args->timeout | |
243 | }; | |
43780b87 | 244 | char servername[20]; |
c2866763 | 245 | |
96802a09 | 246 | xprt = xprt_create_transport(&xprtargs); |
c2866763 CL |
247 | if (IS_ERR(xprt)) |
248 | return (struct rpc_clnt *)xprt; | |
249 | ||
43780b87 CL |
250 | /* |
251 | * If the caller chooses not to specify a hostname, whip | |
252 | * up a string representation of the passed-in address. | |
253 | */ | |
254 | if (args->servername == NULL) { | |
255 | struct sockaddr_in *addr = | |
256 | (struct sockaddr_in *) &args->address; | |
257 | snprintf(servername, sizeof(servername), NIPQUAD_FMT, | |
258 | NIPQUAD(addr->sin_addr.s_addr)); | |
259 | args->servername = servername; | |
260 | } | |
261 | ||
c2866763 CL |
262 | /* |
263 | * By default, kernel RPC client connects from a reserved port. | |
264 | * CAP_NET_BIND_SERVICE will not be set for unprivileged requesters, | |
265 | * but it is always enabled for rpciod, which handles the connect | |
266 | * operation. | |
267 | */ | |
268 | xprt->resvport = 1; | |
269 | if (args->flags & RPC_CLNT_CREATE_NONPRIVPORT) | |
270 | xprt->resvport = 0; | |
271 | ||
c2866763 CL |
272 | clnt = rpc_new_client(xprt, args->servername, args->program, |
273 | args->version, args->authflavor); | |
274 | if (IS_ERR(clnt)) | |
275 | return clnt; | |
276 | ||
277 | if (!(args->flags & RPC_CLNT_CREATE_NOPING)) { | |
278 | int err = rpc_ping(clnt, RPC_TASK_SOFT|RPC_TASK_NOINTR); | |
279 | if (err != 0) { | |
280 | rpc_shutdown_client(clnt); | |
281 | return ERR_PTR(err); | |
282 | } | |
283 | } | |
284 | ||
285 | clnt->cl_softrtry = 1; | |
286 | if (args->flags & RPC_CLNT_CREATE_HARDRTRY) | |
287 | clnt->cl_softrtry = 0; | |
288 | ||
289 | if (args->flags & RPC_CLNT_CREATE_INTR) | |
290 | clnt->cl_intr = 1; | |
291 | if (args->flags & RPC_CLNT_CREATE_AUTOBIND) | |
292 | clnt->cl_autobind = 1; | |
43d78ef2 CL |
293 | if (args->flags & RPC_CLNT_CREATE_DISCRTRY) |
294 | clnt->cl_discrtry = 1; | |
c2866763 CL |
295 | |
296 | return clnt; | |
297 | } | |
b86acd50 | 298 | EXPORT_SYMBOL_GPL(rpc_create); |
c2866763 | 299 | |
1da177e4 LT |
300 | /* |
301 | * This function clones the RPC client structure. It allows us to share the | |
302 | * same transport while varying parameters such as the authentication | |
303 | * flavour. | |
304 | */ | |
305 | struct rpc_clnt * | |
306 | rpc_clone_client(struct rpc_clnt *clnt) | |
307 | { | |
308 | struct rpc_clnt *new; | |
3e32a5d9 | 309 | int err = -ENOMEM; |
1da177e4 | 310 | |
e69062b4 | 311 | new = kmemdup(clnt, sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
312 | if (!new) |
313 | goto out_no_clnt; | |
d431a555 TM |
314 | new->cl_parent = clnt; |
315 | /* Turn off autobind on clones */ | |
316 | new->cl_autobind = 0; | |
317 | INIT_LIST_HEAD(&new->cl_tasks); | |
318 | spin_lock_init(&new->cl_lock); | |
319 | rpc_init_rtt(&new->cl_rtt_default, clnt->cl_xprt->timeout.to_initval); | |
23bf85ba TM |
320 | new->cl_metrics = rpc_alloc_iostats(clnt); |
321 | if (new->cl_metrics == NULL) | |
322 | goto out_no_stats; | |
34f52e35 | 323 | kref_init(&new->cl_kref); |
3e32a5d9 TM |
324 | err = rpc_setup_pipedir(new, clnt->cl_program->pipe_dir_name); |
325 | if (err != 0) | |
326 | goto out_no_path; | |
1da177e4 LT |
327 | if (new->cl_auth) |
328 | atomic_inc(&new->cl_auth->au_count); | |
d431a555 TM |
329 | xprt_get(clnt->cl_xprt); |
330 | kref_get(&clnt->cl_kref); | |
6529eba0 | 331 | rpc_register_client(new); |
4ada539e | 332 | rpciod_up(); |
1da177e4 | 333 | return new; |
3e32a5d9 TM |
334 | out_no_path: |
335 | rpc_free_iostats(new->cl_metrics); | |
23bf85ba TM |
336 | out_no_stats: |
337 | kfree(new); | |
1da177e4 | 338 | out_no_clnt: |
46121cf7 | 339 | dprintk("RPC: %s: returned error %d\n", __FUNCTION__, err); |
3e32a5d9 | 340 | return ERR_PTR(err); |
1da177e4 LT |
341 | } |
342 | ||
343 | /* | |
344 | * Properly shut down an RPC client, terminating all outstanding | |
90c5755f | 345 | * requests. |
1da177e4 | 346 | */ |
4c402b40 | 347 | void rpc_shutdown_client(struct rpc_clnt *clnt) |
1da177e4 | 348 | { |
34f52e35 TM |
349 | dprintk("RPC: shutting down %s client for %s\n", |
350 | clnt->cl_protname, clnt->cl_server); | |
1da177e4 | 351 | |
34f52e35 | 352 | while (!list_empty(&clnt->cl_tasks)) { |
1da177e4 | 353 | rpc_killall_tasks(clnt); |
532347e2 | 354 | wait_event_timeout(destroy_wait, |
34f52e35 | 355 | list_empty(&clnt->cl_tasks), 1*HZ); |
1da177e4 LT |
356 | } |
357 | ||
4c402b40 | 358 | rpc_release_client(clnt); |
1da177e4 LT |
359 | } |
360 | ||
361 | /* | |
34f52e35 | 362 | * Free an RPC client |
1da177e4 | 363 | */ |
34f52e35 TM |
364 | static void |
365 | rpc_free_client(struct kref *kref) | |
1da177e4 | 366 | { |
34f52e35 | 367 | struct rpc_clnt *clnt = container_of(kref, struct rpc_clnt, cl_kref); |
1da177e4 | 368 | |
46121cf7 | 369 | dprintk("RPC: destroying %s client for %s\n", |
1da177e4 | 370 | clnt->cl_protname, clnt->cl_server); |
8f8e7a50 | 371 | if (!IS_ERR(clnt->cl_dentry)) { |
dff02cc1 | 372 | rpc_rmdir(clnt->cl_dentry); |
8f8e7a50 TM |
373 | rpc_put_mount(); |
374 | } | |
3e32a5d9 | 375 | if (clnt->cl_parent != clnt) { |
8ad7c892 | 376 | rpc_release_client(clnt->cl_parent); |
3e32a5d9 TM |
377 | goto out_free; |
378 | } | |
1da177e4 LT |
379 | if (clnt->cl_server != clnt->cl_inline_name) |
380 | kfree(clnt->cl_server); | |
381 | out_free: | |
6529eba0 | 382 | rpc_unregister_client(clnt); |
11c556b3 CL |
383 | rpc_free_iostats(clnt->cl_metrics); |
384 | clnt->cl_metrics = NULL; | |
6b6ca86b | 385 | xprt_put(clnt->cl_xprt); |
4ada539e | 386 | rpciod_down(); |
1da177e4 | 387 | kfree(clnt); |
1da177e4 LT |
388 | } |
389 | ||
1dd17ec6 TM |
390 | /* |
391 | * Free an RPC client | |
392 | */ | |
393 | static void | |
394 | rpc_free_auth(struct kref *kref) | |
395 | { | |
396 | struct rpc_clnt *clnt = container_of(kref, struct rpc_clnt, cl_kref); | |
397 | ||
398 | if (clnt->cl_auth == NULL) { | |
399 | rpc_free_client(kref); | |
400 | return; | |
401 | } | |
402 | ||
403 | /* | |
404 | * Note: RPCSEC_GSS may need to send NULL RPC calls in order to | |
405 | * release remaining GSS contexts. This mechanism ensures | |
406 | * that it can do so safely. | |
407 | */ | |
408 | kref_init(kref); | |
409 | rpcauth_release(clnt->cl_auth); | |
410 | clnt->cl_auth = NULL; | |
411 | kref_put(kref, rpc_free_client); | |
412 | } | |
413 | ||
1da177e4 | 414 | /* |
34f52e35 | 415 | * Release reference to the RPC client |
1da177e4 LT |
416 | */ |
417 | void | |
418 | rpc_release_client(struct rpc_clnt *clnt) | |
419 | { | |
34f52e35 | 420 | dprintk("RPC: rpc_release_client(%p)\n", clnt); |
1da177e4 | 421 | |
34f52e35 TM |
422 | if (list_empty(&clnt->cl_tasks)) |
423 | wake_up(&destroy_wait); | |
1dd17ec6 | 424 | kref_put(&clnt->cl_kref, rpc_free_auth); |
34f52e35 TM |
425 | } |
426 | ||
007e251f AG |
427 | /** |
428 | * rpc_bind_new_program - bind a new RPC program to an existing client | |
429 | * @old - old rpc_client | |
430 | * @program - rpc program to set | |
431 | * @vers - rpc program version | |
432 | * | |
433 | * Clones the rpc client and sets up a new RPC program. This is mainly | |
434 | * of use for enabling different RPC programs to share the same transport. | |
435 | * The Sun NFSv2/v3 ACL protocol can do this. | |
436 | */ | |
437 | struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *old, | |
438 | struct rpc_program *program, | |
439 | int vers) | |
440 | { | |
441 | struct rpc_clnt *clnt; | |
442 | struct rpc_version *version; | |
443 | int err; | |
444 | ||
445 | BUG_ON(vers >= program->nrvers || !program->version[vers]); | |
446 | version = program->version[vers]; | |
447 | clnt = rpc_clone_client(old); | |
448 | if (IS_ERR(clnt)) | |
449 | goto out; | |
450 | clnt->cl_procinfo = version->procs; | |
451 | clnt->cl_maxproc = version->nrprocs; | |
452 | clnt->cl_protname = program->name; | |
453 | clnt->cl_prog = program->number; | |
454 | clnt->cl_vers = version->number; | |
455 | clnt->cl_stats = program->stats; | |
456 | err = rpc_ping(clnt, RPC_TASK_SOFT|RPC_TASK_NOINTR); | |
457 | if (err != 0) { | |
458 | rpc_shutdown_client(clnt); | |
459 | clnt = ERR_PTR(err); | |
460 | } | |
cca5172a | 461 | out: |
007e251f AG |
462 | return clnt; |
463 | } | |
464 | ||
1da177e4 LT |
465 | /* |
466 | * Default callback for async RPC calls | |
467 | */ | |
468 | static void | |
963d8fe5 | 469 | rpc_default_callback(struct rpc_task *task, void *data) |
1da177e4 LT |
470 | { |
471 | } | |
472 | ||
963d8fe5 TM |
473 | static const struct rpc_call_ops rpc_default_ops = { |
474 | .rpc_call_done = rpc_default_callback, | |
475 | }; | |
476 | ||
1da177e4 | 477 | /* |
14b218a8 | 478 | * Export the signal mask handling for synchronous code that |
1da177e4 LT |
479 | * sleeps on RPC calls |
480 | */ | |
2bd61579 | 481 | #define RPC_INTR_SIGNALS (sigmask(SIGHUP) | sigmask(SIGINT) | sigmask(SIGQUIT) | sigmask(SIGTERM)) |
cca5172a | 482 | |
14b218a8 TM |
483 | static void rpc_save_sigmask(sigset_t *oldset, int intr) |
484 | { | |
2bd61579 | 485 | unsigned long sigallow = sigmask(SIGKILL); |
14b218a8 TM |
486 | sigset_t sigmask; |
487 | ||
488 | /* Block all signals except those listed in sigallow */ | |
489 | if (intr) | |
490 | sigallow |= RPC_INTR_SIGNALS; | |
491 | siginitsetinv(&sigmask, sigallow); | |
492 | sigprocmask(SIG_BLOCK, &sigmask, oldset); | |
493 | } | |
494 | ||
495 | static inline void rpc_task_sigmask(struct rpc_task *task, sigset_t *oldset) | |
496 | { | |
497 | rpc_save_sigmask(oldset, !RPC_TASK_UNINTERRUPTIBLE(task)); | |
498 | } | |
499 | ||
500 | static inline void rpc_restore_sigmask(sigset_t *oldset) | |
501 | { | |
502 | sigprocmask(SIG_SETMASK, oldset, NULL); | |
503 | } | |
504 | ||
1da177e4 LT |
505 | void rpc_clnt_sigmask(struct rpc_clnt *clnt, sigset_t *oldset) |
506 | { | |
14b218a8 | 507 | rpc_save_sigmask(oldset, clnt->cl_intr); |
1da177e4 LT |
508 | } |
509 | ||
510 | void rpc_clnt_sigunmask(struct rpc_clnt *clnt, sigset_t *oldset) | |
511 | { | |
14b218a8 | 512 | rpc_restore_sigmask(oldset); |
1da177e4 LT |
513 | } |
514 | ||
6e5b70e9 TM |
515 | static |
516 | struct rpc_task *rpc_do_run_task(struct rpc_clnt *clnt, | |
517 | struct rpc_message *msg, | |
518 | int flags, | |
519 | const struct rpc_call_ops *ops, | |
520 | void *data) | |
521 | { | |
522 | struct rpc_task *task, *ret; | |
523 | sigset_t oldset; | |
524 | ||
525 | task = rpc_new_task(clnt, flags, ops, data); | |
526 | if (task == NULL) { | |
527 | rpc_release_calldata(ops, data); | |
528 | return ERR_PTR(-ENOMEM); | |
529 | } | |
530 | ||
531 | /* Mask signals on synchronous RPC calls and RPCSEC_GSS upcalls */ | |
532 | rpc_task_sigmask(task, &oldset); | |
533 | if (msg != NULL) { | |
534 | rpc_call_setup(task, msg, 0); | |
535 | if (task->tk_status != 0) { | |
536 | ret = ERR_PTR(task->tk_status); | |
537 | rpc_put_task(task); | |
538 | goto out; | |
539 | } | |
540 | } | |
541 | atomic_inc(&task->tk_count); | |
542 | rpc_execute(task); | |
543 | ret = task; | |
544 | out: | |
545 | rpc_restore_sigmask(&oldset); | |
546 | return ret; | |
547 | } | |
548 | ||
549 | /** | |
550 | * rpc_call_sync - Perform a synchronous RPC call | |
551 | * @clnt: pointer to RPC client | |
552 | * @msg: RPC call parameters | |
553 | * @flags: RPC call flags | |
1da177e4 LT |
554 | */ |
555 | int rpc_call_sync(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) | |
556 | { | |
557 | struct rpc_task *task; | |
6e5b70e9 | 558 | int status; |
1da177e4 | 559 | |
1da177e4 LT |
560 | BUG_ON(flags & RPC_TASK_ASYNC); |
561 | ||
6e5b70e9 TM |
562 | task = rpc_do_run_task(clnt, msg, flags, &rpc_default_ops, NULL); |
563 | if (IS_ERR(task)) | |
564 | return PTR_ERR(task); | |
e60859ac | 565 | status = task->tk_status; |
bde8f00c | 566 | rpc_put_task(task); |
1da177e4 LT |
567 | return status; |
568 | } | |
569 | ||
6e5b70e9 TM |
570 | /** |
571 | * rpc_call_async - Perform an asynchronous RPC call | |
572 | * @clnt: pointer to RPC client | |
573 | * @msg: RPC call parameters | |
574 | * @flags: RPC call flags | |
575 | * @ops: RPC call ops | |
576 | * @data: user call data | |
1da177e4 LT |
577 | */ |
578 | int | |
579 | rpc_call_async(struct rpc_clnt *clnt, struct rpc_message *msg, int flags, | |
963d8fe5 | 580 | const struct rpc_call_ops *tk_ops, void *data) |
1da177e4 LT |
581 | { |
582 | struct rpc_task *task; | |
1da177e4 | 583 | |
6e5b70e9 TM |
584 | task = rpc_do_run_task(clnt, msg, flags|RPC_TASK_ASYNC, tk_ops, data); |
585 | if (IS_ERR(task)) | |
586 | return PTR_ERR(task); | |
587 | rpc_put_task(task); | |
588 | return 0; | |
1da177e4 LT |
589 | } |
590 | ||
6e5b70e9 TM |
591 | /** |
592 | * rpc_run_task - Allocate a new RPC task, then run rpc_execute against it | |
593 | * @clnt: pointer to RPC client | |
594 | * @flags: RPC flags | |
595 | * @ops: RPC call ops | |
596 | * @data: user call data | |
597 | */ | |
598 | struct rpc_task *rpc_run_task(struct rpc_clnt *clnt, int flags, | |
599 | const struct rpc_call_ops *tk_ops, | |
600 | void *data) | |
601 | { | |
602 | return rpc_do_run_task(clnt, NULL, flags, tk_ops, data); | |
603 | } | |
604 | EXPORT_SYMBOL(rpc_run_task); | |
1da177e4 LT |
605 | |
606 | void | |
607 | rpc_call_setup(struct rpc_task *task, struct rpc_message *msg, int flags) | |
608 | { | |
609 | task->tk_msg = *msg; | |
610 | task->tk_flags |= flags; | |
611 | /* Bind the user cred */ | |
612 | if (task->tk_msg.rpc_cred != NULL) | |
613 | rpcauth_holdcred(task); | |
614 | else | |
615 | rpcauth_bindcred(task); | |
616 | ||
617 | if (task->tk_status == 0) | |
618 | task->tk_action = call_start; | |
619 | else | |
abbcf28f | 620 | task->tk_action = rpc_exit_task; |
1da177e4 LT |
621 | } |
622 | ||
ed39440a CL |
623 | /** |
624 | * rpc_peeraddr - extract remote peer address from clnt's xprt | |
625 | * @clnt: RPC client structure | |
626 | * @buf: target buffer | |
627 | * @size: length of target buffer | |
628 | * | |
629 | * Returns the number of bytes that are actually in the stored address. | |
630 | */ | |
631 | size_t rpc_peeraddr(struct rpc_clnt *clnt, struct sockaddr *buf, size_t bufsize) | |
632 | { | |
633 | size_t bytes; | |
634 | struct rpc_xprt *xprt = clnt->cl_xprt; | |
635 | ||
636 | bytes = sizeof(xprt->addr); | |
637 | if (bytes > bufsize) | |
638 | bytes = bufsize; | |
639 | memcpy(buf, &clnt->cl_xprt->addr, bytes); | |
c4efcb1d | 640 | return xprt->addrlen; |
ed39440a | 641 | } |
b86acd50 | 642 | EXPORT_SYMBOL_GPL(rpc_peeraddr); |
ed39440a | 643 | |
f425eba4 CL |
644 | /** |
645 | * rpc_peeraddr2str - return remote peer address in printable format | |
646 | * @clnt: RPC client structure | |
647 | * @format: address format | |
648 | * | |
649 | */ | |
650 | char *rpc_peeraddr2str(struct rpc_clnt *clnt, enum rpc_display_format_t format) | |
651 | { | |
652 | struct rpc_xprt *xprt = clnt->cl_xprt; | |
7559c7a2 CL |
653 | |
654 | if (xprt->address_strings[format] != NULL) | |
655 | return xprt->address_strings[format]; | |
656 | else | |
657 | return "unprintable"; | |
f425eba4 | 658 | } |
b86acd50 | 659 | EXPORT_SYMBOL_GPL(rpc_peeraddr2str); |
f425eba4 | 660 | |
1da177e4 LT |
661 | void |
662 | rpc_setbufsize(struct rpc_clnt *clnt, unsigned int sndsize, unsigned int rcvsize) | |
663 | { | |
664 | struct rpc_xprt *xprt = clnt->cl_xprt; | |
470056c2 CL |
665 | if (xprt->ops->set_buffer_size) |
666 | xprt->ops->set_buffer_size(xprt, sndsize, rcvsize); | |
1da177e4 LT |
667 | } |
668 | ||
669 | /* | |
670 | * Return size of largest payload RPC client can support, in bytes | |
671 | * | |
672 | * For stream transports, this is one RPC record fragment (see RFC | |
673 | * 1831), as we don't support multi-record requests yet. For datagram | |
674 | * transports, this is the size of an IP packet minus the IP, UDP, and | |
675 | * RPC header sizes. | |
676 | */ | |
677 | size_t rpc_max_payload(struct rpc_clnt *clnt) | |
678 | { | |
679 | return clnt->cl_xprt->max_payload; | |
680 | } | |
b86acd50 | 681 | EXPORT_SYMBOL_GPL(rpc_max_payload); |
1da177e4 | 682 | |
35f5a422 CL |
683 | /** |
684 | * rpc_force_rebind - force transport to check that remote port is unchanged | |
685 | * @clnt: client to rebind | |
686 | * | |
687 | */ | |
688 | void rpc_force_rebind(struct rpc_clnt *clnt) | |
689 | { | |
690 | if (clnt->cl_autobind) | |
ec739ef0 | 691 | xprt_clear_bound(clnt->cl_xprt); |
35f5a422 | 692 | } |
b86acd50 | 693 | EXPORT_SYMBOL_GPL(rpc_force_rebind); |
35f5a422 | 694 | |
1da177e4 LT |
695 | /* |
696 | * Restart an (async) RPC call. Usually called from within the | |
697 | * exit handler. | |
698 | */ | |
699 | void | |
700 | rpc_restart_call(struct rpc_task *task) | |
701 | { | |
702 | if (RPC_ASSASSINATED(task)) | |
703 | return; | |
704 | ||
705 | task->tk_action = call_start; | |
706 | } | |
707 | ||
708 | /* | |
709 | * 0. Initial state | |
710 | * | |
711 | * Other FSM states can be visited zero or more times, but | |
712 | * this state is visited exactly once for each RPC. | |
713 | */ | |
714 | static void | |
715 | call_start(struct rpc_task *task) | |
716 | { | |
717 | struct rpc_clnt *clnt = task->tk_client; | |
718 | ||
46121cf7 CL |
719 | dprintk("RPC: %5u call_start %s%d proc %d (%s)\n", task->tk_pid, |
720 | clnt->cl_protname, clnt->cl_vers, | |
721 | task->tk_msg.rpc_proc->p_proc, | |
722 | (RPC_IS_ASYNC(task) ? "async" : "sync")); | |
1da177e4 LT |
723 | |
724 | /* Increment call count */ | |
725 | task->tk_msg.rpc_proc->p_count++; | |
726 | clnt->cl_stats->rpccnt++; | |
727 | task->tk_action = call_reserve; | |
728 | } | |
729 | ||
730 | /* | |
731 | * 1. Reserve an RPC call slot | |
732 | */ | |
733 | static void | |
734 | call_reserve(struct rpc_task *task) | |
735 | { | |
46121cf7 | 736 | dprint_status(task); |
1da177e4 LT |
737 | |
738 | if (!rpcauth_uptodatecred(task)) { | |
739 | task->tk_action = call_refresh; | |
740 | return; | |
741 | } | |
742 | ||
743 | task->tk_status = 0; | |
744 | task->tk_action = call_reserveresult; | |
745 | xprt_reserve(task); | |
746 | } | |
747 | ||
748 | /* | |
749 | * 1b. Grok the result of xprt_reserve() | |
750 | */ | |
751 | static void | |
752 | call_reserveresult(struct rpc_task *task) | |
753 | { | |
754 | int status = task->tk_status; | |
755 | ||
46121cf7 | 756 | dprint_status(task); |
1da177e4 LT |
757 | |
758 | /* | |
759 | * After a call to xprt_reserve(), we must have either | |
760 | * a request slot or else an error status. | |
761 | */ | |
762 | task->tk_status = 0; | |
763 | if (status >= 0) { | |
764 | if (task->tk_rqstp) { | |
765 | task->tk_action = call_allocate; | |
766 | return; | |
767 | } | |
768 | ||
769 | printk(KERN_ERR "%s: status=%d, but no request slot, exiting\n", | |
770 | __FUNCTION__, status); | |
771 | rpc_exit(task, -EIO); | |
772 | return; | |
773 | } | |
774 | ||
775 | /* | |
776 | * Even though there was an error, we may have acquired | |
777 | * a request slot somehow. Make sure not to leak it. | |
778 | */ | |
779 | if (task->tk_rqstp) { | |
780 | printk(KERN_ERR "%s: status=%d, request allocated anyway\n", | |
781 | __FUNCTION__, status); | |
782 | xprt_release(task); | |
783 | } | |
784 | ||
785 | switch (status) { | |
786 | case -EAGAIN: /* woken up; retry */ | |
787 | task->tk_action = call_reserve; | |
788 | return; | |
789 | case -EIO: /* probably a shutdown */ | |
790 | break; | |
791 | default: | |
792 | printk(KERN_ERR "%s: unrecognized error %d, exiting\n", | |
793 | __FUNCTION__, status); | |
794 | break; | |
795 | } | |
796 | rpc_exit(task, status); | |
797 | } | |
798 | ||
799 | /* | |
800 | * 2. Allocate the buffer. For details, see sched.c:rpc_malloc. | |
02107148 | 801 | * (Note: buffer memory is freed in xprt_release). |
1da177e4 LT |
802 | */ |
803 | static void | |
804 | call_allocate(struct rpc_task *task) | |
805 | { | |
1be27f36 | 806 | unsigned int slack = task->tk_msg.rpc_cred->cr_auth->au_cslack; |
02107148 CL |
807 | struct rpc_rqst *req = task->tk_rqstp; |
808 | struct rpc_xprt *xprt = task->tk_xprt; | |
2bea90d4 | 809 | struct rpc_procinfo *proc = task->tk_msg.rpc_proc; |
1da177e4 | 810 | |
46121cf7 CL |
811 | dprint_status(task); |
812 | ||
2bea90d4 | 813 | task->tk_status = 0; |
1da177e4 | 814 | task->tk_action = call_bind; |
2bea90d4 | 815 | |
02107148 | 816 | if (req->rq_buffer) |
1da177e4 LT |
817 | return; |
818 | ||
2bea90d4 CL |
819 | if (proc->p_proc != 0) { |
820 | BUG_ON(proc->p_arglen == 0); | |
821 | if (proc->p_decode != NULL) | |
822 | BUG_ON(proc->p_replen == 0); | |
823 | } | |
1da177e4 | 824 | |
2bea90d4 CL |
825 | /* |
826 | * Calculate the size (in quads) of the RPC call | |
827 | * and reply headers, and convert both values | |
828 | * to byte sizes. | |
829 | */ | |
830 | req->rq_callsize = RPC_CALLHDRSIZE + (slack << 1) + proc->p_arglen; | |
831 | req->rq_callsize <<= 2; | |
832 | req->rq_rcvsize = RPC_REPHDRSIZE + slack + proc->p_replen; | |
833 | req->rq_rcvsize <<= 2; | |
834 | ||
c5a4dd8b CL |
835 | req->rq_buffer = xprt->ops->buf_alloc(task, |
836 | req->rq_callsize + req->rq_rcvsize); | |
2bea90d4 | 837 | if (req->rq_buffer != NULL) |
1da177e4 | 838 | return; |
46121cf7 CL |
839 | |
840 | dprintk("RPC: %5u rpc_buffer allocation failed\n", task->tk_pid); | |
1da177e4 | 841 | |
14b218a8 | 842 | if (RPC_IS_ASYNC(task) || !signalled()) { |
1da177e4 LT |
843 | xprt_release(task); |
844 | task->tk_action = call_reserve; | |
845 | rpc_delay(task, HZ>>4); | |
846 | return; | |
847 | } | |
848 | ||
849 | rpc_exit(task, -ERESTARTSYS); | |
850 | } | |
851 | ||
940e3318 TM |
852 | static inline int |
853 | rpc_task_need_encode(struct rpc_task *task) | |
854 | { | |
855 | return task->tk_rqstp->rq_snd_buf.len == 0; | |
856 | } | |
857 | ||
858 | static inline void | |
859 | rpc_task_force_reencode(struct rpc_task *task) | |
860 | { | |
861 | task->tk_rqstp->rq_snd_buf.len = 0; | |
862 | } | |
863 | ||
2bea90d4 CL |
864 | static inline void |
865 | rpc_xdr_buf_init(struct xdr_buf *buf, void *start, size_t len) | |
866 | { | |
867 | buf->head[0].iov_base = start; | |
868 | buf->head[0].iov_len = len; | |
869 | buf->tail[0].iov_len = 0; | |
870 | buf->page_len = 0; | |
871 | buf->len = 0; | |
872 | buf->buflen = len; | |
873 | } | |
874 | ||
1da177e4 LT |
875 | /* |
876 | * 3. Encode arguments of an RPC call | |
877 | */ | |
878 | static void | |
879 | call_encode(struct rpc_task *task) | |
880 | { | |
1da177e4 | 881 | struct rpc_rqst *req = task->tk_rqstp; |
1da177e4 | 882 | kxdrproc_t encode; |
d8ed029d | 883 | __be32 *p; |
1da177e4 | 884 | |
46121cf7 | 885 | dprint_status(task); |
1da177e4 | 886 | |
2bea90d4 CL |
887 | rpc_xdr_buf_init(&req->rq_snd_buf, |
888 | req->rq_buffer, | |
889 | req->rq_callsize); | |
890 | rpc_xdr_buf_init(&req->rq_rcv_buf, | |
891 | (char *)req->rq_buffer + req->rq_callsize, | |
892 | req->rq_rcvsize); | |
1da177e4 LT |
893 | |
894 | /* Encode header and provided arguments */ | |
895 | encode = task->tk_msg.rpc_proc->p_encode; | |
896 | if (!(p = call_header(task))) { | |
897 | printk(KERN_INFO "RPC: call_header failed, exit EIO\n"); | |
898 | rpc_exit(task, -EIO); | |
899 | return; | |
900 | } | |
f3680312 BF |
901 | if (encode == NULL) |
902 | return; | |
903 | ||
904 | task->tk_status = rpcauth_wrap_req(task, encode, req, p, | |
905 | task->tk_msg.rpc_argp); | |
906 | if (task->tk_status == -ENOMEM) { | |
907 | /* XXX: Is this sane? */ | |
908 | rpc_delay(task, 3*HZ); | |
909 | task->tk_status = -EAGAIN; | |
910 | } | |
1da177e4 LT |
911 | } |
912 | ||
913 | /* | |
914 | * 4. Get the server port number if not yet set | |
915 | */ | |
916 | static void | |
917 | call_bind(struct rpc_task *task) | |
918 | { | |
ec739ef0 | 919 | struct rpc_xprt *xprt = task->tk_xprt; |
1da177e4 | 920 | |
46121cf7 | 921 | dprint_status(task); |
1da177e4 | 922 | |
da351878 | 923 | task->tk_action = call_connect; |
ec739ef0 | 924 | if (!xprt_bound(xprt)) { |
da351878 | 925 | task->tk_action = call_bind_status; |
ec739ef0 | 926 | task->tk_timeout = xprt->bind_timeout; |
bbf7c1dd | 927 | xprt->ops->rpcbind(task); |
1da177e4 LT |
928 | } |
929 | } | |
930 | ||
931 | /* | |
da351878 CL |
932 | * 4a. Sort out bind result |
933 | */ | |
934 | static void | |
935 | call_bind_status(struct rpc_task *task) | |
936 | { | |
937 | int status = -EACCES; | |
938 | ||
939 | if (task->tk_status >= 0) { | |
46121cf7 | 940 | dprint_status(task); |
da351878 CL |
941 | task->tk_status = 0; |
942 | task->tk_action = call_connect; | |
943 | return; | |
944 | } | |
945 | ||
946 | switch (task->tk_status) { | |
947 | case -EACCES: | |
46121cf7 CL |
948 | dprintk("RPC: %5u remote rpcbind: RPC program/version " |
949 | "unavailable\n", task->tk_pid); | |
ea635a51 | 950 | rpc_delay(task, 3*HZ); |
da45828e | 951 | goto retry_timeout; |
da351878 | 952 | case -ETIMEDOUT: |
46121cf7 | 953 | dprintk("RPC: %5u rpcbind request timed out\n", |
da351878 | 954 | task->tk_pid); |
da45828e | 955 | goto retry_timeout; |
da351878 | 956 | case -EPFNOSUPPORT: |
46121cf7 | 957 | dprintk("RPC: %5u remote rpcbind service unavailable\n", |
da351878 CL |
958 | task->tk_pid); |
959 | break; | |
960 | case -EPROTONOSUPPORT: | |
00a6e7bb | 961 | dprintk("RPC: %5u remote rpcbind version unavailable, retrying\n", |
da351878 | 962 | task->tk_pid); |
00a6e7bb CL |
963 | task->tk_status = 0; |
964 | task->tk_action = call_bind; | |
965 | return; | |
da351878 | 966 | default: |
46121cf7 | 967 | dprintk("RPC: %5u unrecognized rpcbind error (%d)\n", |
da351878 CL |
968 | task->tk_pid, -task->tk_status); |
969 | status = -EIO; | |
da351878 CL |
970 | } |
971 | ||
972 | rpc_exit(task, status); | |
973 | return; | |
974 | ||
da45828e TM |
975 | retry_timeout: |
976 | task->tk_action = call_timeout; | |
da351878 CL |
977 | } |
978 | ||
979 | /* | |
980 | * 4b. Connect to the RPC server | |
1da177e4 LT |
981 | */ |
982 | static void | |
983 | call_connect(struct rpc_task *task) | |
984 | { | |
da351878 | 985 | struct rpc_xprt *xprt = task->tk_xprt; |
1da177e4 | 986 | |
46121cf7 | 987 | dprintk("RPC: %5u call_connect xprt %p %s connected\n", |
da351878 CL |
988 | task->tk_pid, xprt, |
989 | (xprt_connected(xprt) ? "is" : "is not")); | |
1da177e4 | 990 | |
da351878 CL |
991 | task->tk_action = call_transmit; |
992 | if (!xprt_connected(xprt)) { | |
993 | task->tk_action = call_connect_status; | |
994 | if (task->tk_status < 0) | |
995 | return; | |
996 | xprt_connect(task); | |
1da177e4 | 997 | } |
1da177e4 LT |
998 | } |
999 | ||
1000 | /* | |
da351878 | 1001 | * 4c. Sort out connect result |
1da177e4 LT |
1002 | */ |
1003 | static void | |
1004 | call_connect_status(struct rpc_task *task) | |
1005 | { | |
1006 | struct rpc_clnt *clnt = task->tk_client; | |
1007 | int status = task->tk_status; | |
1008 | ||
46121cf7 | 1009 | dprint_status(task); |
da351878 | 1010 | |
1da177e4 LT |
1011 | task->tk_status = 0; |
1012 | if (status >= 0) { | |
1013 | clnt->cl_stats->netreconn++; | |
1014 | task->tk_action = call_transmit; | |
1015 | return; | |
1016 | } | |
1017 | ||
da351878 | 1018 | /* Something failed: remote service port may have changed */ |
35f5a422 | 1019 | rpc_force_rebind(clnt); |
da351878 | 1020 | |
1da177e4 LT |
1021 | switch (status) { |
1022 | case -ENOTCONN: | |
1da177e4 | 1023 | case -EAGAIN: |
da351878 | 1024 | task->tk_action = call_bind; |
da45828e TM |
1025 | if (!RPC_IS_SOFT(task)) |
1026 | return; | |
1027 | /* if soft mounted, test if we've timed out */ | |
1028 | case -ETIMEDOUT: | |
1029 | task->tk_action = call_timeout; | |
1030 | return; | |
1da177e4 | 1031 | } |
da45828e | 1032 | rpc_exit(task, -EIO); |
1da177e4 LT |
1033 | } |
1034 | ||
1035 | /* | |
1036 | * 5. Transmit the RPC request, and wait for reply | |
1037 | */ | |
1038 | static void | |
1039 | call_transmit(struct rpc_task *task) | |
1040 | { | |
46121cf7 | 1041 | dprint_status(task); |
1da177e4 LT |
1042 | |
1043 | task->tk_action = call_status; | |
1044 | if (task->tk_status < 0) | |
1045 | return; | |
1046 | task->tk_status = xprt_prepare_transmit(task); | |
1047 | if (task->tk_status != 0) | |
1048 | return; | |
e0ab53de | 1049 | task->tk_action = call_transmit_status; |
1da177e4 | 1050 | /* Encode here so that rpcsec_gss can use correct sequence number. */ |
940e3318 | 1051 | if (rpc_task_need_encode(task)) { |
e0ab53de | 1052 | BUG_ON(task->tk_rqstp->rq_bytes_sent != 0); |
1da177e4 | 1053 | call_encode(task); |
5e5ce5be TM |
1054 | /* Did the encode result in an error condition? */ |
1055 | if (task->tk_status != 0) | |
e0ab53de | 1056 | return; |
5e5ce5be | 1057 | } |
1da177e4 LT |
1058 | xprt_transmit(task); |
1059 | if (task->tk_status < 0) | |
1060 | return; | |
e0ab53de TM |
1061 | /* |
1062 | * On success, ensure that we call xprt_end_transmit() before sleeping | |
1063 | * in order to allow access to the socket to other RPC requests. | |
1064 | */ | |
1065 | call_transmit_status(task); | |
1066 | if (task->tk_msg.rpc_proc->p_decode != NULL) | |
1067 | return; | |
1068 | task->tk_action = rpc_exit_task; | |
1069 | rpc_wake_up_task(task); | |
1070 | } | |
1071 | ||
1072 | /* | |
1073 | * 5a. Handle cleanup after a transmission | |
1074 | */ | |
1075 | static void | |
1076 | call_transmit_status(struct rpc_task *task) | |
1077 | { | |
1078 | task->tk_action = call_status; | |
1079 | /* | |
1080 | * Special case: if we've been waiting on the socket's write_space() | |
1081 | * callback, then don't call xprt_end_transmit(). | |
1082 | */ | |
1083 | if (task->tk_status == -EAGAIN) | |
1084 | return; | |
1085 | xprt_end_transmit(task); | |
940e3318 | 1086 | rpc_task_force_reencode(task); |
1da177e4 LT |
1087 | } |
1088 | ||
1089 | /* | |
1090 | * 6. Sort out the RPC call status | |
1091 | */ | |
1092 | static void | |
1093 | call_status(struct rpc_task *task) | |
1094 | { | |
1095 | struct rpc_clnt *clnt = task->tk_client; | |
1096 | struct rpc_rqst *req = task->tk_rqstp; | |
1097 | int status; | |
1098 | ||
1099 | if (req->rq_received > 0 && !req->rq_bytes_sent) | |
1100 | task->tk_status = req->rq_received; | |
1101 | ||
46121cf7 | 1102 | dprint_status(task); |
1da177e4 LT |
1103 | |
1104 | status = task->tk_status; | |
1105 | if (status >= 0) { | |
1106 | task->tk_action = call_decode; | |
1107 | return; | |
1108 | } | |
1109 | ||
1110 | task->tk_status = 0; | |
1111 | switch(status) { | |
76303992 TM |
1112 | case -EHOSTDOWN: |
1113 | case -EHOSTUNREACH: | |
1114 | case -ENETUNREACH: | |
1115 | /* | |
1116 | * Delay any retries for 3 seconds, then handle as if it | |
1117 | * were a timeout. | |
1118 | */ | |
1119 | rpc_delay(task, 3*HZ); | |
1da177e4 LT |
1120 | case -ETIMEDOUT: |
1121 | task->tk_action = call_timeout; | |
241c39b9 TM |
1122 | if (task->tk_client->cl_discrtry) |
1123 | xprt_disconnect(task->tk_xprt); | |
1da177e4 LT |
1124 | break; |
1125 | case -ECONNREFUSED: | |
1126 | case -ENOTCONN: | |
35f5a422 | 1127 | rpc_force_rebind(clnt); |
1da177e4 LT |
1128 | task->tk_action = call_bind; |
1129 | break; | |
1130 | case -EAGAIN: | |
1131 | task->tk_action = call_transmit; | |
1132 | break; | |
1133 | case -EIO: | |
1134 | /* shutdown or soft timeout */ | |
1135 | rpc_exit(task, status); | |
1136 | break; | |
1137 | default: | |
f518e35a | 1138 | printk("%s: RPC call returned error %d\n", |
1da177e4 LT |
1139 | clnt->cl_protname, -status); |
1140 | rpc_exit(task, status); | |
1da177e4 LT |
1141 | } |
1142 | } | |
1143 | ||
1144 | /* | |
e0ab53de | 1145 | * 6a. Handle RPC timeout |
1da177e4 LT |
1146 | * We do not release the request slot, so we keep using the |
1147 | * same XID for all retransmits. | |
1148 | */ | |
1149 | static void | |
1150 | call_timeout(struct rpc_task *task) | |
1151 | { | |
1152 | struct rpc_clnt *clnt = task->tk_client; | |
1153 | ||
1154 | if (xprt_adjust_timeout(task->tk_rqstp) == 0) { | |
46121cf7 | 1155 | dprintk("RPC: %5u call_timeout (minor)\n", task->tk_pid); |
1da177e4 LT |
1156 | goto retry; |
1157 | } | |
1158 | ||
46121cf7 | 1159 | dprintk("RPC: %5u call_timeout (major)\n", task->tk_pid); |
ef759a2e CL |
1160 | task->tk_timeouts++; |
1161 | ||
1da177e4 | 1162 | if (RPC_IS_SOFT(task)) { |
f518e35a | 1163 | printk(KERN_NOTICE "%s: server %s not responding, timed out\n", |
1da177e4 LT |
1164 | clnt->cl_protname, clnt->cl_server); |
1165 | rpc_exit(task, -EIO); | |
1166 | return; | |
1167 | } | |
1168 | ||
f518e35a | 1169 | if (!(task->tk_flags & RPC_CALL_MAJORSEEN)) { |
1da177e4 LT |
1170 | task->tk_flags |= RPC_CALL_MAJORSEEN; |
1171 | printk(KERN_NOTICE "%s: server %s not responding, still trying\n", | |
1172 | clnt->cl_protname, clnt->cl_server); | |
1173 | } | |
35f5a422 | 1174 | rpc_force_rebind(clnt); |
1da177e4 LT |
1175 | |
1176 | retry: | |
1177 | clnt->cl_stats->rpcretrans++; | |
1178 | task->tk_action = call_bind; | |
1179 | task->tk_status = 0; | |
1180 | } | |
1181 | ||
1182 | /* | |
1183 | * 7. Decode the RPC reply | |
1184 | */ | |
1185 | static void | |
1186 | call_decode(struct rpc_task *task) | |
1187 | { | |
1188 | struct rpc_clnt *clnt = task->tk_client; | |
1189 | struct rpc_rqst *req = task->tk_rqstp; | |
1190 | kxdrproc_t decode = task->tk_msg.rpc_proc->p_decode; | |
d8ed029d | 1191 | __be32 *p; |
1da177e4 | 1192 | |
46121cf7 CL |
1193 | dprintk("RPC: %5u call_decode (status %d)\n", |
1194 | task->tk_pid, task->tk_status); | |
1da177e4 | 1195 | |
f518e35a | 1196 | if (task->tk_flags & RPC_CALL_MAJORSEEN) { |
1da177e4 LT |
1197 | printk(KERN_NOTICE "%s: server %s OK\n", |
1198 | clnt->cl_protname, clnt->cl_server); | |
1199 | task->tk_flags &= ~RPC_CALL_MAJORSEEN; | |
1200 | } | |
1201 | ||
1202 | if (task->tk_status < 12) { | |
1203 | if (!RPC_IS_SOFT(task)) { | |
1204 | task->tk_action = call_bind; | |
1205 | clnt->cl_stats->rpcretrans++; | |
1206 | goto out_retry; | |
1207 | } | |
46121cf7 CL |
1208 | dprintk("RPC: %s: too small RPC reply size (%d bytes)\n", |
1209 | clnt->cl_protname, task->tk_status); | |
da45828e TM |
1210 | task->tk_action = call_timeout; |
1211 | goto out_retry; | |
1da177e4 LT |
1212 | } |
1213 | ||
43ac3f29 TM |
1214 | /* |
1215 | * Ensure that we see all writes made by xprt_complete_rqst() | |
1216 | * before it changed req->rq_received. | |
1217 | */ | |
1218 | smp_rmb(); | |
1da177e4 LT |
1219 | req->rq_rcv_buf.len = req->rq_private_buf.len; |
1220 | ||
1221 | /* Check that the softirq receive buffer is valid */ | |
1222 | WARN_ON(memcmp(&req->rq_rcv_buf, &req->rq_private_buf, | |
1223 | sizeof(req->rq_rcv_buf)) != 0); | |
1224 | ||
1225 | /* Verify the RPC header */ | |
abbcf28f TM |
1226 | p = call_verify(task); |
1227 | if (IS_ERR(p)) { | |
1228 | if (p == ERR_PTR(-EAGAIN)) | |
1229 | goto out_retry; | |
1230 | return; | |
1da177e4 LT |
1231 | } |
1232 | ||
abbcf28f | 1233 | task->tk_action = rpc_exit_task; |
1da177e4 | 1234 | |
6d5fcb5a | 1235 | if (decode) { |
1da177e4 LT |
1236 | task->tk_status = rpcauth_unwrap_resp(task, decode, req, p, |
1237 | task->tk_msg.rpc_resp); | |
6d5fcb5a | 1238 | } |
46121cf7 CL |
1239 | dprintk("RPC: %5u call_decode result %d\n", task->tk_pid, |
1240 | task->tk_status); | |
1da177e4 LT |
1241 | return; |
1242 | out_retry: | |
1243 | req->rq_received = req->rq_private_buf.len = 0; | |
1244 | task->tk_status = 0; | |
241c39b9 TM |
1245 | if (task->tk_client->cl_discrtry) |
1246 | xprt_disconnect(task->tk_xprt); | |
1da177e4 LT |
1247 | } |
1248 | ||
1249 | /* | |
1250 | * 8. Refresh the credentials if rejected by the server | |
1251 | */ | |
1252 | static void | |
1253 | call_refresh(struct rpc_task *task) | |
1254 | { | |
46121cf7 | 1255 | dprint_status(task); |
1da177e4 LT |
1256 | |
1257 | xprt_release(task); /* Must do to obtain new XID */ | |
1258 | task->tk_action = call_refreshresult; | |
1259 | task->tk_status = 0; | |
1260 | task->tk_client->cl_stats->rpcauthrefresh++; | |
1261 | rpcauth_refreshcred(task); | |
1262 | } | |
1263 | ||
1264 | /* | |
1265 | * 8a. Process the results of a credential refresh | |
1266 | */ | |
1267 | static void | |
1268 | call_refreshresult(struct rpc_task *task) | |
1269 | { | |
1270 | int status = task->tk_status; | |
46121cf7 CL |
1271 | |
1272 | dprint_status(task); | |
1da177e4 LT |
1273 | |
1274 | task->tk_status = 0; | |
1275 | task->tk_action = call_reserve; | |
1276 | if (status >= 0 && rpcauth_uptodatecred(task)) | |
1277 | return; | |
1278 | if (status == -EACCES) { | |
1279 | rpc_exit(task, -EACCES); | |
1280 | return; | |
1281 | } | |
1282 | task->tk_action = call_refresh; | |
1283 | if (status != -ETIMEDOUT) | |
1284 | rpc_delay(task, 3*HZ); | |
1285 | return; | |
1286 | } | |
1287 | ||
1288 | /* | |
1289 | * Call header serialization | |
1290 | */ | |
d8ed029d | 1291 | static __be32 * |
1da177e4 LT |
1292 | call_header(struct rpc_task *task) |
1293 | { | |
1294 | struct rpc_clnt *clnt = task->tk_client; | |
1da177e4 | 1295 | struct rpc_rqst *req = task->tk_rqstp; |
d8ed029d | 1296 | __be32 *p = req->rq_svec[0].iov_base; |
1da177e4 LT |
1297 | |
1298 | /* FIXME: check buffer size? */ | |
808012fb CL |
1299 | |
1300 | p = xprt_skip_transport_header(task->tk_xprt, p); | |
1da177e4 LT |
1301 | *p++ = req->rq_xid; /* XID */ |
1302 | *p++ = htonl(RPC_CALL); /* CALL */ | |
1303 | *p++ = htonl(RPC_VERSION); /* RPC version */ | |
1304 | *p++ = htonl(clnt->cl_prog); /* program number */ | |
1305 | *p++ = htonl(clnt->cl_vers); /* program version */ | |
1306 | *p++ = htonl(task->tk_msg.rpc_proc->p_proc); /* procedure */ | |
334ccfd5 TM |
1307 | p = rpcauth_marshcred(task, p); |
1308 | req->rq_slen = xdr_adjust_iovec(&req->rq_svec[0], p); | |
1309 | return p; | |
1da177e4 LT |
1310 | } |
1311 | ||
1312 | /* | |
1313 | * Reply header verification | |
1314 | */ | |
d8ed029d | 1315 | static __be32 * |
1da177e4 LT |
1316 | call_verify(struct rpc_task *task) |
1317 | { | |
1318 | struct kvec *iov = &task->tk_rqstp->rq_rcv_buf.head[0]; | |
1319 | int len = task->tk_rqstp->rq_rcv_buf.len >> 2; | |
d8ed029d AD |
1320 | __be32 *p = iov->iov_base; |
1321 | u32 n; | |
1da177e4 LT |
1322 | int error = -EACCES; |
1323 | ||
e8896495 DH |
1324 | if ((task->tk_rqstp->rq_rcv_buf.len & 3) != 0) { |
1325 | /* RFC-1014 says that the representation of XDR data must be a | |
1326 | * multiple of four bytes | |
1327 | * - if it isn't pointer subtraction in the NFS client may give | |
1328 | * undefined results | |
1329 | */ | |
8a702bbb TM |
1330 | dprintk("RPC: %5u %s: XDR representation not a multiple of" |
1331 | " 4 bytes: 0x%x\n", task->tk_pid, __FUNCTION__, | |
1332 | task->tk_rqstp->rq_rcv_buf.len); | |
e8896495 DH |
1333 | goto out_eio; |
1334 | } | |
1da177e4 LT |
1335 | if ((len -= 3) < 0) |
1336 | goto out_overflow; | |
1337 | p += 1; /* skip XID */ | |
1338 | ||
1339 | if ((n = ntohl(*p++)) != RPC_REPLY) { | |
8a702bbb TM |
1340 | dprintk("RPC: %5u %s: not an RPC reply: %x\n", |
1341 | task->tk_pid, __FUNCTION__, n); | |
abbcf28f | 1342 | goto out_garbage; |
1da177e4 LT |
1343 | } |
1344 | if ((n = ntohl(*p++)) != RPC_MSG_ACCEPTED) { | |
1345 | if (--len < 0) | |
1346 | goto out_overflow; | |
1347 | switch ((n = ntohl(*p++))) { | |
1348 | case RPC_AUTH_ERROR: | |
1349 | break; | |
1350 | case RPC_MISMATCH: | |
46121cf7 CL |
1351 | dprintk("RPC: %5u %s: RPC call version " |
1352 | "mismatch!\n", | |
1353 | task->tk_pid, __FUNCTION__); | |
cdf47706 AG |
1354 | error = -EPROTONOSUPPORT; |
1355 | goto out_err; | |
1da177e4 | 1356 | default: |
46121cf7 CL |
1357 | dprintk("RPC: %5u %s: RPC call rejected, " |
1358 | "unknown error: %x\n", | |
1359 | task->tk_pid, __FUNCTION__, n); | |
1da177e4 LT |
1360 | goto out_eio; |
1361 | } | |
1362 | if (--len < 0) | |
1363 | goto out_overflow; | |
1364 | switch ((n = ntohl(*p++))) { | |
1365 | case RPC_AUTH_REJECTEDCRED: | |
1366 | case RPC_AUTH_REJECTEDVERF: | |
1367 | case RPCSEC_GSS_CREDPROBLEM: | |
1368 | case RPCSEC_GSS_CTXPROBLEM: | |
1369 | if (!task->tk_cred_retry) | |
1370 | break; | |
1371 | task->tk_cred_retry--; | |
46121cf7 CL |
1372 | dprintk("RPC: %5u %s: retry stale creds\n", |
1373 | task->tk_pid, __FUNCTION__); | |
1da177e4 LT |
1374 | rpcauth_invalcred(task); |
1375 | task->tk_action = call_refresh; | |
abbcf28f | 1376 | goto out_retry; |
1da177e4 LT |
1377 | case RPC_AUTH_BADCRED: |
1378 | case RPC_AUTH_BADVERF: | |
1379 | /* possibly garbled cred/verf? */ | |
1380 | if (!task->tk_garb_retry) | |
1381 | break; | |
1382 | task->tk_garb_retry--; | |
46121cf7 CL |
1383 | dprintk("RPC: %5u %s: retry garbled creds\n", |
1384 | task->tk_pid, __FUNCTION__); | |
1da177e4 | 1385 | task->tk_action = call_bind; |
abbcf28f | 1386 | goto out_retry; |
1da177e4 | 1387 | case RPC_AUTH_TOOWEAK: |
1356b8c2 LS |
1388 | printk(KERN_NOTICE "call_verify: server %s requires stronger " |
1389 | "authentication.\n", task->tk_client->cl_server); | |
1da177e4 LT |
1390 | break; |
1391 | default: | |
8a702bbb TM |
1392 | dprintk("RPC: %5u %s: unknown auth error: %x\n", |
1393 | task->tk_pid, __FUNCTION__, n); | |
1da177e4 LT |
1394 | error = -EIO; |
1395 | } | |
46121cf7 CL |
1396 | dprintk("RPC: %5u %s: call rejected %d\n", |
1397 | task->tk_pid, __FUNCTION__, n); | |
1da177e4 LT |
1398 | goto out_err; |
1399 | } | |
1400 | if (!(p = rpcauth_checkverf(task, p))) { | |
8a702bbb TM |
1401 | dprintk("RPC: %5u %s: auth check failed\n", |
1402 | task->tk_pid, __FUNCTION__); | |
abbcf28f | 1403 | goto out_garbage; /* bad verifier, retry */ |
1da177e4 | 1404 | } |
d8ed029d | 1405 | len = p - (__be32 *)iov->iov_base - 1; |
1da177e4 LT |
1406 | if (len < 0) |
1407 | goto out_overflow; | |
1408 | switch ((n = ntohl(*p++))) { | |
1409 | case RPC_SUCCESS: | |
1410 | return p; | |
1411 | case RPC_PROG_UNAVAIL: | |
46121cf7 CL |
1412 | dprintk("RPC: %5u %s: program %u is unsupported by server %s\n", |
1413 | task->tk_pid, __FUNCTION__, | |
1da177e4 LT |
1414 | (unsigned int)task->tk_client->cl_prog, |
1415 | task->tk_client->cl_server); | |
cdf47706 AG |
1416 | error = -EPFNOSUPPORT; |
1417 | goto out_err; | |
1da177e4 | 1418 | case RPC_PROG_MISMATCH: |
46121cf7 CL |
1419 | dprintk("RPC: %5u %s: program %u, version %u unsupported by " |
1420 | "server %s\n", task->tk_pid, __FUNCTION__, | |
1da177e4 LT |
1421 | (unsigned int)task->tk_client->cl_prog, |
1422 | (unsigned int)task->tk_client->cl_vers, | |
1423 | task->tk_client->cl_server); | |
cdf47706 AG |
1424 | error = -EPROTONOSUPPORT; |
1425 | goto out_err; | |
1da177e4 | 1426 | case RPC_PROC_UNAVAIL: |
46121cf7 CL |
1427 | dprintk("RPC: %5u %s: proc %p unsupported by program %u, " |
1428 | "version %u on server %s\n", | |
1429 | task->tk_pid, __FUNCTION__, | |
1da177e4 LT |
1430 | task->tk_msg.rpc_proc, |
1431 | task->tk_client->cl_prog, | |
1432 | task->tk_client->cl_vers, | |
1433 | task->tk_client->cl_server); | |
cdf47706 AG |
1434 | error = -EOPNOTSUPP; |
1435 | goto out_err; | |
1da177e4 | 1436 | case RPC_GARBAGE_ARGS: |
46121cf7 CL |
1437 | dprintk("RPC: %5u %s: server saw garbage\n", |
1438 | task->tk_pid, __FUNCTION__); | |
1da177e4 LT |
1439 | break; /* retry */ |
1440 | default: | |
8a702bbb TM |
1441 | dprintk("RPC: %5u %s: server accept status: %x\n", |
1442 | task->tk_pid, __FUNCTION__, n); | |
1da177e4 LT |
1443 | /* Also retry */ |
1444 | } | |
1445 | ||
abbcf28f | 1446 | out_garbage: |
1da177e4 LT |
1447 | task->tk_client->cl_stats->rpcgarbage++; |
1448 | if (task->tk_garb_retry) { | |
1449 | task->tk_garb_retry--; | |
46121cf7 CL |
1450 | dprintk("RPC: %5u %s: retrying\n", |
1451 | task->tk_pid, __FUNCTION__); | |
1da177e4 | 1452 | task->tk_action = call_bind; |
abbcf28f TM |
1453 | out_retry: |
1454 | return ERR_PTR(-EAGAIN); | |
1da177e4 | 1455 | } |
1da177e4 LT |
1456 | out_eio: |
1457 | error = -EIO; | |
1458 | out_err: | |
1459 | rpc_exit(task, error); | |
8a702bbb TM |
1460 | dprintk("RPC: %5u %s: call failed with error %d\n", task->tk_pid, |
1461 | __FUNCTION__, error); | |
abbcf28f | 1462 | return ERR_PTR(error); |
1da177e4 | 1463 | out_overflow: |
8a702bbb TM |
1464 | dprintk("RPC: %5u %s: server reply was truncated.\n", task->tk_pid, |
1465 | __FUNCTION__); | |
abbcf28f | 1466 | goto out_garbage; |
1da177e4 | 1467 | } |
5ee0ed7d | 1468 | |
d8ed029d | 1469 | static int rpcproc_encode_null(void *rqstp, __be32 *data, void *obj) |
5ee0ed7d TM |
1470 | { |
1471 | return 0; | |
1472 | } | |
1473 | ||
d8ed029d | 1474 | static int rpcproc_decode_null(void *rqstp, __be32 *data, void *obj) |
5ee0ed7d TM |
1475 | { |
1476 | return 0; | |
1477 | } | |
1478 | ||
1479 | static struct rpc_procinfo rpcproc_null = { | |
1480 | .p_encode = rpcproc_encode_null, | |
1481 | .p_decode = rpcproc_decode_null, | |
1482 | }; | |
1483 | ||
64c91a1f | 1484 | static int rpc_ping(struct rpc_clnt *clnt, int flags) |
5ee0ed7d TM |
1485 | { |
1486 | struct rpc_message msg = { | |
1487 | .rpc_proc = &rpcproc_null, | |
1488 | }; | |
1489 | int err; | |
1490 | msg.rpc_cred = authnull_ops.lookup_cred(NULL, NULL, 0); | |
1491 | err = rpc_call_sync(clnt, &msg, flags); | |
1492 | put_rpccred(msg.rpc_cred); | |
1493 | return err; | |
1494 | } | |
188fef11 | 1495 | |
5e1550d6 TM |
1496 | struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred, int flags) |
1497 | { | |
1498 | struct rpc_message msg = { | |
1499 | .rpc_proc = &rpcproc_null, | |
1500 | .rpc_cred = cred, | |
1501 | }; | |
1502 | return rpc_do_run_task(clnt, &msg, flags, &rpc_default_ops, NULL); | |
1503 | } | |
1504 | EXPORT_SYMBOL(rpc_call_null); | |
1505 | ||
188fef11 TM |
1506 | #ifdef RPC_DEBUG |
1507 | void rpc_show_tasks(void) | |
1508 | { | |
1509 | struct rpc_clnt *clnt; | |
1510 | struct rpc_task *t; | |
1511 | ||
1512 | spin_lock(&rpc_client_lock); | |
1513 | if (list_empty(&all_clients)) | |
1514 | goto out; | |
1515 | printk("-pid- proc flgs status -client- -prog- --rqstp- -timeout " | |
1516 | "-rpcwait -action- ---ops--\n"); | |
1517 | list_for_each_entry(clnt, &all_clients, cl_clients) { | |
1518 | if (list_empty(&clnt->cl_tasks)) | |
1519 | continue; | |
1520 | spin_lock(&clnt->cl_lock); | |
1521 | list_for_each_entry(t, &clnt->cl_tasks, tk_task) { | |
1522 | const char *rpc_waitq = "none"; | |
1523 | ||
1524 | if (RPC_IS_QUEUED(t)) | |
1525 | rpc_waitq = rpc_qname(t->u.tk_wait.rpc_waitq); | |
1526 | ||
1527 | printk("%5u %04d %04x %6d %8p %6d %8p %8ld %8s %8p %8p\n", | |
1528 | t->tk_pid, | |
1529 | (t->tk_msg.rpc_proc ? t->tk_msg.rpc_proc->p_proc : -1), | |
1530 | t->tk_flags, t->tk_status, | |
1531 | t->tk_client, | |
1532 | (t->tk_client ? t->tk_client->cl_prog : 0), | |
1533 | t->tk_rqstp, t->tk_timeout, | |
1534 | rpc_waitq, | |
1535 | t->tk_action, t->tk_ops); | |
1536 | } | |
1537 | spin_unlock(&clnt->cl_lock); | |
1538 | } | |
1539 | out: | |
1540 | spin_unlock(&rpc_client_lock); | |
1541 | } | |
1542 | #endif |