PCI: use dev_printk in quirk messages
[pv_ops_mirror.git] / net / sunrpc / clnt.c
blob0998e6d0966469df4ceb8f5adde3a842956093d5
1 /*
2 * linux/net/sunrpc/clnt.c
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.
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.
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.
20 * Copyright (C) 1992,1993 Rick Sladkey <jrs@world.std.com>
21 * Copyright (C) 1995,1996 Olaf Kirch <okir@monad.swb.de>
24 #include <asm/system.h>
26 #include <linux/module.h>
27 #include <linux/types.h>
28 #include <linux/mm.h>
29 #include <linux/slab.h>
30 #include <linux/smp_lock.h>
31 #include <linux/utsname.h>
32 #include <linux/workqueue.h>
33 #include <linux/in6.h>
35 #include <linux/sunrpc/clnt.h>
36 #include <linux/sunrpc/rpc_pipe_fs.h>
37 #include <linux/sunrpc/metrics.h>
40 #ifdef RPC_DEBUG
41 # define RPCDBG_FACILITY RPCDBG_CALL
42 #endif
44 #define dprint_status(t) \
45 dprintk("RPC: %5u %s (status %d)\n", t->tk_pid, \
46 __FUNCTION__, t->tk_status)
49 * All RPC clients are linked into this list
51 static LIST_HEAD(all_clients);
52 static DEFINE_SPINLOCK(rpc_client_lock);
54 static DECLARE_WAIT_QUEUE_HEAD(destroy_wait);
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);
64 static void call_bind_status(struct rpc_task *task);
65 static void call_transmit(struct rpc_task *task);
66 static void call_status(struct rpc_task *task);
67 static void call_transmit_status(struct rpc_task *task);
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);
73 static __be32 * call_header(struct rpc_task *task);
74 static __be32 * call_verify(struct rpc_task *task);
76 static int rpc_ping(struct rpc_clnt *clnt, int flags);
78 static void rpc_register_client(struct rpc_clnt *clnt)
80 spin_lock(&rpc_client_lock);
81 list_add(&clnt->cl_clients, &all_clients);
82 spin_unlock(&rpc_client_lock);
85 static void rpc_unregister_client(struct rpc_clnt *clnt)
87 spin_lock(&rpc_client_lock);
88 list_del(&clnt->cl_clients);
89 spin_unlock(&rpc_client_lock);
92 static int
93 rpc_setup_pipedir(struct rpc_clnt *clnt, char *dir_name)
95 static uint32_t clntid;
96 int error;
98 clnt->cl_vfsmnt = ERR_PTR(-ENOENT);
99 clnt->cl_dentry = ERR_PTR(-ENOENT);
100 if (dir_name == NULL)
101 return 0;
103 clnt->cl_vfsmnt = rpc_get_mount();
104 if (IS_ERR(clnt->cl_vfsmnt))
105 return PTR_ERR(clnt->cl_vfsmnt);
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;
115 error = PTR_ERR(clnt->cl_dentry);
116 if (error != -EEXIST) {
117 printk(KERN_INFO "RPC: Couldn't create pipefs entry %s, error %d\n",
118 clnt->cl_pathname, error);
119 rpc_put_mount();
120 return error;
125 static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args, struct rpc_xprt *xprt)
127 struct rpc_program *program = args->program;
128 struct rpc_version *version;
129 struct rpc_clnt *clnt = NULL;
130 struct rpc_auth *auth;
131 int err;
132 size_t len;
134 /* sanity check the name before trying to print it */
135 err = -EINVAL;
136 len = strlen(args->servername);
137 if (len > RPC_MAXNETNAMELEN)
138 goto out_no_rpciod;
139 len++;
141 dprintk("RPC: creating %s client for %s (xprt %p)\n",
142 program->name, args->servername, xprt);
144 err = rpciod_up();
145 if (err)
146 goto out_no_rpciod;
147 err = -EINVAL;
148 if (!xprt)
149 goto out_no_xprt;
151 if (args->version >= program->nrvers)
152 goto out_err;
153 version = program->version[args->version];
154 if (version == NULL)
155 goto out_err;
157 err = -ENOMEM;
158 clnt = kzalloc(sizeof(*clnt), GFP_KERNEL);
159 if (!clnt)
160 goto out_err;
161 clnt->cl_parent = clnt;
163 clnt->cl_server = clnt->cl_inline_name;
164 if (len > sizeof(clnt->cl_inline_name)) {
165 char *buf = kmalloc(len, GFP_KERNEL);
166 if (buf != NULL)
167 clnt->cl_server = buf;
168 else
169 len = sizeof(clnt->cl_inline_name);
171 strlcpy(clnt->cl_server, args->servername, len);
173 clnt->cl_xprt = xprt;
174 clnt->cl_procinfo = version->procs;
175 clnt->cl_maxproc = version->nrprocs;
176 clnt->cl_protname = program->name;
177 clnt->cl_prog = program->number;
178 clnt->cl_vers = version->number;
179 clnt->cl_stats = program->stats;
180 clnt->cl_metrics = rpc_alloc_iostats(clnt);
181 err = -ENOMEM;
182 if (clnt->cl_metrics == NULL)
183 goto out_no_stats;
184 clnt->cl_program = program;
185 INIT_LIST_HEAD(&clnt->cl_tasks);
186 spin_lock_init(&clnt->cl_lock);
188 if (!xprt_bound(clnt->cl_xprt))
189 clnt->cl_autobind = 1;
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;
198 clnt->cl_rtt = &clnt->cl_rtt_default;
199 rpc_init_rtt(&clnt->cl_rtt_default, clnt->cl_timeout->to_initval);
201 kref_init(&clnt->cl_kref);
203 err = rpc_setup_pipedir(clnt, program->pipe_dir_name);
204 if (err < 0)
205 goto out_no_path;
207 auth = rpcauth_create(args->authflavor, clnt);
208 if (IS_ERR(auth)) {
209 printk(KERN_INFO "RPC: Couldn't create auth handle (flavor %u)\n",
210 args->authflavor);
211 err = PTR_ERR(auth);
212 goto out_no_auth;
215 /* save the nodename */
216 clnt->cl_nodelen = strlen(utsname()->nodename);
217 if (clnt->cl_nodelen > UNX_MAXNODENAME)
218 clnt->cl_nodelen = UNX_MAXNODENAME;
219 memcpy(clnt->cl_nodename, utsname()->nodename, clnt->cl_nodelen);
220 rpc_register_client(clnt);
221 return clnt;
223 out_no_auth:
224 if (!IS_ERR(clnt->cl_dentry)) {
225 rpc_rmdir(clnt->cl_dentry);
226 rpc_put_mount();
228 out_no_path:
229 rpc_free_iostats(clnt->cl_metrics);
230 out_no_stats:
231 if (clnt->cl_server != clnt->cl_inline_name)
232 kfree(clnt->cl_server);
233 kfree(clnt);
234 out_err:
235 xprt_put(xprt);
236 out_no_xprt:
237 rpciod_down();
238 out_no_rpciod:
239 return ERR_PTR(err);
243 * rpc_create - create an RPC client and transport with one call
244 * @args: rpc_clnt create argument structure
246 * Creates and initializes an RPC transport and an RPC client.
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.
252 struct rpc_clnt *rpc_create(struct rpc_create_args *args)
254 struct rpc_xprt *xprt;
255 struct rpc_clnt *clnt;
256 struct xprt_create xprtargs = {
257 .ident = args->protocol,
258 .srcaddr = args->saddress,
259 .dstaddr = args->address,
260 .addrlen = args->addrsize,
262 char servername[48];
264 xprt = xprt_create_transport(&xprtargs);
265 if (IS_ERR(xprt))
266 return (struct rpc_clnt *)xprt;
269 * If the caller chooses not to specify a hostname, whip
270 * up a string representation of the passed-in address.
272 if (args->servername == NULL) {
273 servername[0] = '\0';
274 switch (args->address->sa_family) {
275 case AF_INET: {
276 struct sockaddr_in *sin =
277 (struct sockaddr_in *)args->address;
278 snprintf(servername, sizeof(servername), NIPQUAD_FMT,
279 NIPQUAD(sin->sin_addr.s_addr));
280 break;
282 case AF_INET6: {
283 struct sockaddr_in6 *sin =
284 (struct sockaddr_in6 *)args->address;
285 snprintf(servername, sizeof(servername), NIP6_FMT,
286 NIP6(sin->sin6_addr));
287 break;
289 default:
290 /* caller wants default server name, but
291 * address family isn't recognized. */
292 return ERR_PTR(-EINVAL);
294 args->servername = servername;
297 xprt = xprt_create_transport(&xprtargs);
298 if (IS_ERR(xprt))
299 return (struct rpc_clnt *)xprt;
302 * By default, kernel RPC client connects from a reserved port.
303 * CAP_NET_BIND_SERVICE will not be set for unprivileged requesters,
304 * but it is always enabled for rpciod, which handles the connect
305 * operation.
307 xprt->resvport = 1;
308 if (args->flags & RPC_CLNT_CREATE_NONPRIVPORT)
309 xprt->resvport = 0;
311 clnt = rpc_new_client(args, xprt);
312 if (IS_ERR(clnt))
313 return clnt;
315 if (!(args->flags & RPC_CLNT_CREATE_NOPING)) {
316 int err = rpc_ping(clnt, RPC_TASK_SOFT);
317 if (err != 0) {
318 rpc_shutdown_client(clnt);
319 return ERR_PTR(err);
323 clnt->cl_softrtry = 1;
324 if (args->flags & RPC_CLNT_CREATE_HARDRTRY)
325 clnt->cl_softrtry = 0;
327 if (args->flags & RPC_CLNT_CREATE_AUTOBIND)
328 clnt->cl_autobind = 1;
329 if (args->flags & RPC_CLNT_CREATE_DISCRTRY)
330 clnt->cl_discrtry = 1;
332 return clnt;
334 EXPORT_SYMBOL_GPL(rpc_create);
337 * This function clones the RPC client structure. It allows us to share the
338 * same transport while varying parameters such as the authentication
339 * flavour.
341 struct rpc_clnt *
342 rpc_clone_client(struct rpc_clnt *clnt)
344 struct rpc_clnt *new;
345 int err = -ENOMEM;
347 new = kmemdup(clnt, sizeof(*new), GFP_KERNEL);
348 if (!new)
349 goto out_no_clnt;
350 new->cl_parent = clnt;
351 /* Turn off autobind on clones */
352 new->cl_autobind = 0;
353 INIT_LIST_HEAD(&new->cl_tasks);
354 spin_lock_init(&new->cl_lock);
355 rpc_init_rtt(&new->cl_rtt_default, clnt->cl_timeout->to_initval);
356 new->cl_metrics = rpc_alloc_iostats(clnt);
357 if (new->cl_metrics == NULL)
358 goto out_no_stats;
359 kref_init(&new->cl_kref);
360 err = rpc_setup_pipedir(new, clnt->cl_program->pipe_dir_name);
361 if (err != 0)
362 goto out_no_path;
363 if (new->cl_auth)
364 atomic_inc(&new->cl_auth->au_count);
365 xprt_get(clnt->cl_xprt);
366 kref_get(&clnt->cl_kref);
367 rpc_register_client(new);
368 rpciod_up();
369 return new;
370 out_no_path:
371 rpc_free_iostats(new->cl_metrics);
372 out_no_stats:
373 kfree(new);
374 out_no_clnt:
375 dprintk("RPC: %s: returned error %d\n", __FUNCTION__, err);
376 return ERR_PTR(err);
378 EXPORT_SYMBOL_GPL(rpc_clone_client);
381 * Properly shut down an RPC client, terminating all outstanding
382 * requests.
384 void rpc_shutdown_client(struct rpc_clnt *clnt)
386 dprintk("RPC: shutting down %s client for %s\n",
387 clnt->cl_protname, clnt->cl_server);
389 while (!list_empty(&clnt->cl_tasks)) {
390 rpc_killall_tasks(clnt);
391 wait_event_timeout(destroy_wait,
392 list_empty(&clnt->cl_tasks), 1*HZ);
395 rpc_release_client(clnt);
397 EXPORT_SYMBOL_GPL(rpc_shutdown_client);
400 * Free an RPC client
402 static void
403 rpc_free_client(struct kref *kref)
405 struct rpc_clnt *clnt = container_of(kref, struct rpc_clnt, cl_kref);
407 dprintk("RPC: destroying %s client for %s\n",
408 clnt->cl_protname, clnt->cl_server);
409 if (!IS_ERR(clnt->cl_dentry)) {
410 rpc_rmdir(clnt->cl_dentry);
411 rpc_put_mount();
413 if (clnt->cl_parent != clnt) {
414 rpc_release_client(clnt->cl_parent);
415 goto out_free;
417 if (clnt->cl_server != clnt->cl_inline_name)
418 kfree(clnt->cl_server);
419 out_free:
420 rpc_unregister_client(clnt);
421 rpc_free_iostats(clnt->cl_metrics);
422 clnt->cl_metrics = NULL;
423 xprt_put(clnt->cl_xprt);
424 rpciod_down();
425 kfree(clnt);
429 * Free an RPC client
431 static void
432 rpc_free_auth(struct kref *kref)
434 struct rpc_clnt *clnt = container_of(kref, struct rpc_clnt, cl_kref);
436 if (clnt->cl_auth == NULL) {
437 rpc_free_client(kref);
438 return;
442 * Note: RPCSEC_GSS may need to send NULL RPC calls in order to
443 * release remaining GSS contexts. This mechanism ensures
444 * that it can do so safely.
446 kref_init(kref);
447 rpcauth_release(clnt->cl_auth);
448 clnt->cl_auth = NULL;
449 kref_put(kref, rpc_free_client);
453 * Release reference to the RPC client
455 void
456 rpc_release_client(struct rpc_clnt *clnt)
458 dprintk("RPC: rpc_release_client(%p)\n", clnt);
460 if (list_empty(&clnt->cl_tasks))
461 wake_up(&destroy_wait);
462 kref_put(&clnt->cl_kref, rpc_free_auth);
466 * rpc_bind_new_program - bind a new RPC program to an existing client
467 * @old - old rpc_client
468 * @program - rpc program to set
469 * @vers - rpc program version
471 * Clones the rpc client and sets up a new RPC program. This is mainly
472 * of use for enabling different RPC programs to share the same transport.
473 * The Sun NFSv2/v3 ACL protocol can do this.
475 struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *old,
476 struct rpc_program *program,
477 u32 vers)
479 struct rpc_clnt *clnt;
480 struct rpc_version *version;
481 int err;
483 BUG_ON(vers >= program->nrvers || !program->version[vers]);
484 version = program->version[vers];
485 clnt = rpc_clone_client(old);
486 if (IS_ERR(clnt))
487 goto out;
488 clnt->cl_procinfo = version->procs;
489 clnt->cl_maxproc = version->nrprocs;
490 clnt->cl_protname = program->name;
491 clnt->cl_prog = program->number;
492 clnt->cl_vers = version->number;
493 clnt->cl_stats = program->stats;
494 err = rpc_ping(clnt, RPC_TASK_SOFT);
495 if (err != 0) {
496 rpc_shutdown_client(clnt);
497 clnt = ERR_PTR(err);
499 out:
500 return clnt;
502 EXPORT_SYMBOL_GPL(rpc_bind_new_program);
505 * Default callback for async RPC calls
507 static void
508 rpc_default_callback(struct rpc_task *task, void *data)
512 static const struct rpc_call_ops rpc_default_ops = {
513 .rpc_call_done = rpc_default_callback,
517 * rpc_run_task - Allocate a new RPC task, then run rpc_execute against it
518 * @task_setup_data: pointer to task initialisation data
520 struct rpc_task *rpc_run_task(const struct rpc_task_setup *task_setup_data)
522 struct rpc_task *task, *ret;
524 task = rpc_new_task(task_setup_data);
525 if (task == NULL) {
526 rpc_release_calldata(task_setup_data->callback_ops,
527 task_setup_data->callback_data);
528 ret = ERR_PTR(-ENOMEM);
529 goto out;
532 if (task->tk_status != 0) {
533 ret = ERR_PTR(task->tk_status);
534 rpc_put_task(task);
535 goto out;
537 atomic_inc(&task->tk_count);
538 rpc_execute(task);
539 ret = task;
540 out:
541 return ret;
543 EXPORT_SYMBOL_GPL(rpc_run_task);
546 * rpc_call_sync - Perform a synchronous RPC call
547 * @clnt: pointer to RPC client
548 * @msg: RPC call parameters
549 * @flags: RPC call flags
551 int rpc_call_sync(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
553 struct rpc_task *task;
554 struct rpc_task_setup task_setup_data = {
555 .rpc_client = clnt,
556 .rpc_message = msg,
557 .callback_ops = &rpc_default_ops,
558 .flags = flags,
560 int status;
562 BUG_ON(flags & RPC_TASK_ASYNC);
564 task = rpc_run_task(&task_setup_data);
565 if (IS_ERR(task))
566 return PTR_ERR(task);
567 status = task->tk_status;
568 rpc_put_task(task);
569 return status;
571 EXPORT_SYMBOL_GPL(rpc_call_sync);
574 * rpc_call_async - Perform an asynchronous RPC call
575 * @clnt: pointer to RPC client
576 * @msg: RPC call parameters
577 * @flags: RPC call flags
578 * @ops: RPC call ops
579 * @data: user call data
582 rpc_call_async(struct rpc_clnt *clnt, struct rpc_message *msg, int flags,
583 const struct rpc_call_ops *tk_ops, void *data)
585 struct rpc_task *task;
586 struct rpc_task_setup task_setup_data = {
587 .rpc_client = clnt,
588 .rpc_message = msg,
589 .callback_ops = tk_ops,
590 .callback_data = data,
591 .flags = flags|RPC_TASK_ASYNC,
594 task = rpc_run_task(&task_setup_data);
595 if (IS_ERR(task))
596 return PTR_ERR(task);
597 rpc_put_task(task);
598 return 0;
600 EXPORT_SYMBOL_GPL(rpc_call_async);
602 void
603 rpc_call_start(struct rpc_task *task)
605 task->tk_action = call_start;
607 EXPORT_SYMBOL_GPL(rpc_call_start);
610 * rpc_peeraddr - extract remote peer address from clnt's xprt
611 * @clnt: RPC client structure
612 * @buf: target buffer
613 * @size: length of target buffer
615 * Returns the number of bytes that are actually in the stored address.
617 size_t rpc_peeraddr(struct rpc_clnt *clnt, struct sockaddr *buf, size_t bufsize)
619 size_t bytes;
620 struct rpc_xprt *xprt = clnt->cl_xprt;
622 bytes = sizeof(xprt->addr);
623 if (bytes > bufsize)
624 bytes = bufsize;
625 memcpy(buf, &clnt->cl_xprt->addr, bytes);
626 return xprt->addrlen;
628 EXPORT_SYMBOL_GPL(rpc_peeraddr);
631 * rpc_peeraddr2str - return remote peer address in printable format
632 * @clnt: RPC client structure
633 * @format: address format
636 const char *rpc_peeraddr2str(struct rpc_clnt *clnt,
637 enum rpc_display_format_t format)
639 struct rpc_xprt *xprt = clnt->cl_xprt;
641 if (xprt->address_strings[format] != NULL)
642 return xprt->address_strings[format];
643 else
644 return "unprintable";
646 EXPORT_SYMBOL_GPL(rpc_peeraddr2str);
648 void
649 rpc_setbufsize(struct rpc_clnt *clnt, unsigned int sndsize, unsigned int rcvsize)
651 struct rpc_xprt *xprt = clnt->cl_xprt;
652 if (xprt->ops->set_buffer_size)
653 xprt->ops->set_buffer_size(xprt, sndsize, rcvsize);
655 EXPORT_SYMBOL_GPL(rpc_setbufsize);
658 * Return size of largest payload RPC client can support, in bytes
660 * For stream transports, this is one RPC record fragment (see RFC
661 * 1831), as we don't support multi-record requests yet. For datagram
662 * transports, this is the size of an IP packet minus the IP, UDP, and
663 * RPC header sizes.
665 size_t rpc_max_payload(struct rpc_clnt *clnt)
667 return clnt->cl_xprt->max_payload;
669 EXPORT_SYMBOL_GPL(rpc_max_payload);
672 * rpc_force_rebind - force transport to check that remote port is unchanged
673 * @clnt: client to rebind
676 void rpc_force_rebind(struct rpc_clnt *clnt)
678 if (clnt->cl_autobind)
679 xprt_clear_bound(clnt->cl_xprt);
681 EXPORT_SYMBOL_GPL(rpc_force_rebind);
684 * Restart an (async) RPC call. Usually called from within the
685 * exit handler.
687 void
688 rpc_restart_call(struct rpc_task *task)
690 if (RPC_ASSASSINATED(task))
691 return;
693 task->tk_action = call_start;
695 EXPORT_SYMBOL_GPL(rpc_restart_call);
698 * 0. Initial state
700 * Other FSM states can be visited zero or more times, but
701 * this state is visited exactly once for each RPC.
703 static void
704 call_start(struct rpc_task *task)
706 struct rpc_clnt *clnt = task->tk_client;
708 dprintk("RPC: %5u call_start %s%d proc %d (%s)\n", task->tk_pid,
709 clnt->cl_protname, clnt->cl_vers,
710 task->tk_msg.rpc_proc->p_proc,
711 (RPC_IS_ASYNC(task) ? "async" : "sync"));
713 /* Increment call count */
714 task->tk_msg.rpc_proc->p_count++;
715 clnt->cl_stats->rpccnt++;
716 task->tk_action = call_reserve;
720 * 1. Reserve an RPC call slot
722 static void
723 call_reserve(struct rpc_task *task)
725 dprint_status(task);
727 if (!rpcauth_uptodatecred(task)) {
728 task->tk_action = call_refresh;
729 return;
732 task->tk_status = 0;
733 task->tk_action = call_reserveresult;
734 xprt_reserve(task);
738 * 1b. Grok the result of xprt_reserve()
740 static void
741 call_reserveresult(struct rpc_task *task)
743 int status = task->tk_status;
745 dprint_status(task);
748 * After a call to xprt_reserve(), we must have either
749 * a request slot or else an error status.
751 task->tk_status = 0;
752 if (status >= 0) {
753 if (task->tk_rqstp) {
754 task->tk_action = call_allocate;
755 return;
758 printk(KERN_ERR "%s: status=%d, but no request slot, exiting\n",
759 __FUNCTION__, status);
760 rpc_exit(task, -EIO);
761 return;
765 * Even though there was an error, we may have acquired
766 * a request slot somehow. Make sure not to leak it.
768 if (task->tk_rqstp) {
769 printk(KERN_ERR "%s: status=%d, request allocated anyway\n",
770 __FUNCTION__, status);
771 xprt_release(task);
774 switch (status) {
775 case -EAGAIN: /* woken up; retry */
776 task->tk_action = call_reserve;
777 return;
778 case -EIO: /* probably a shutdown */
779 break;
780 default:
781 printk(KERN_ERR "%s: unrecognized error %d, exiting\n",
782 __FUNCTION__, status);
783 break;
785 rpc_exit(task, status);
789 * 2. Allocate the buffer. For details, see sched.c:rpc_malloc.
790 * (Note: buffer memory is freed in xprt_release).
792 static void
793 call_allocate(struct rpc_task *task)
795 unsigned int slack = task->tk_msg.rpc_cred->cr_auth->au_cslack;
796 struct rpc_rqst *req = task->tk_rqstp;
797 struct rpc_xprt *xprt = task->tk_xprt;
798 struct rpc_procinfo *proc = task->tk_msg.rpc_proc;
800 dprint_status(task);
802 task->tk_status = 0;
803 task->tk_action = call_bind;
805 if (req->rq_buffer)
806 return;
808 if (proc->p_proc != 0) {
809 BUG_ON(proc->p_arglen == 0);
810 if (proc->p_decode != NULL)
811 BUG_ON(proc->p_replen == 0);
815 * Calculate the size (in quads) of the RPC call
816 * and reply headers, and convert both values
817 * to byte sizes.
819 req->rq_callsize = RPC_CALLHDRSIZE + (slack << 1) + proc->p_arglen;
820 req->rq_callsize <<= 2;
821 req->rq_rcvsize = RPC_REPHDRSIZE + slack + proc->p_replen;
822 req->rq_rcvsize <<= 2;
824 req->rq_buffer = xprt->ops->buf_alloc(task,
825 req->rq_callsize + req->rq_rcvsize);
826 if (req->rq_buffer != NULL)
827 return;
829 dprintk("RPC: %5u rpc_buffer allocation failed\n", task->tk_pid);
831 if (RPC_IS_ASYNC(task) || !signalled()) {
832 task->tk_action = call_allocate;
833 rpc_delay(task, HZ>>4);
834 return;
837 rpc_exit(task, -ERESTARTSYS);
840 static inline int
841 rpc_task_need_encode(struct rpc_task *task)
843 return task->tk_rqstp->rq_snd_buf.len == 0;
846 static inline void
847 rpc_task_force_reencode(struct rpc_task *task)
849 task->tk_rqstp->rq_snd_buf.len = 0;
852 static inline void
853 rpc_xdr_buf_init(struct xdr_buf *buf, void *start, size_t len)
855 buf->head[0].iov_base = start;
856 buf->head[0].iov_len = len;
857 buf->tail[0].iov_len = 0;
858 buf->page_len = 0;
859 buf->flags = 0;
860 buf->len = 0;
861 buf->buflen = len;
865 * 3. Encode arguments of an RPC call
867 static void
868 call_encode(struct rpc_task *task)
870 struct rpc_rqst *req = task->tk_rqstp;
871 kxdrproc_t encode;
872 __be32 *p;
874 dprint_status(task);
876 rpc_xdr_buf_init(&req->rq_snd_buf,
877 req->rq_buffer,
878 req->rq_callsize);
879 rpc_xdr_buf_init(&req->rq_rcv_buf,
880 (char *)req->rq_buffer + req->rq_callsize,
881 req->rq_rcvsize);
883 /* Encode header and provided arguments */
884 encode = task->tk_msg.rpc_proc->p_encode;
885 if (!(p = call_header(task))) {
886 printk(KERN_INFO "RPC: call_header failed, exit EIO\n");
887 rpc_exit(task, -EIO);
888 return;
890 if (encode == NULL)
891 return;
893 task->tk_status = rpcauth_wrap_req(task, encode, req, p,
894 task->tk_msg.rpc_argp);
895 if (task->tk_status == -ENOMEM) {
896 /* XXX: Is this sane? */
897 rpc_delay(task, 3*HZ);
898 task->tk_status = -EAGAIN;
903 * 4. Get the server port number if not yet set
905 static void
906 call_bind(struct rpc_task *task)
908 struct rpc_xprt *xprt = task->tk_xprt;
910 dprint_status(task);
912 task->tk_action = call_connect;
913 if (!xprt_bound(xprt)) {
914 task->tk_action = call_bind_status;
915 task->tk_timeout = xprt->bind_timeout;
916 xprt->ops->rpcbind(task);
921 * 4a. Sort out bind result
923 static void
924 call_bind_status(struct rpc_task *task)
926 int status = -EIO;
928 if (task->tk_status >= 0) {
929 dprint_status(task);
930 task->tk_status = 0;
931 task->tk_action = call_connect;
932 return;
935 switch (task->tk_status) {
936 case -EAGAIN:
937 dprintk("RPC: %5u rpcbind waiting for another request "
938 "to finish\n", task->tk_pid);
939 /* avoid busy-waiting here -- could be a network outage. */
940 rpc_delay(task, 5*HZ);
941 goto retry_timeout;
942 case -EACCES:
943 dprintk("RPC: %5u remote rpcbind: RPC program/version "
944 "unavailable\n", task->tk_pid);
945 /* fail immediately if this is an RPC ping */
946 if (task->tk_msg.rpc_proc->p_proc == 0) {
947 status = -EOPNOTSUPP;
948 break;
950 rpc_delay(task, 3*HZ);
951 goto retry_timeout;
952 case -ETIMEDOUT:
953 dprintk("RPC: %5u rpcbind request timed out\n",
954 task->tk_pid);
955 goto retry_timeout;
956 case -EPFNOSUPPORT:
957 /* server doesn't support any rpcbind version we know of */
958 dprintk("RPC: %5u remote rpcbind service unavailable\n",
959 task->tk_pid);
960 break;
961 case -EPROTONOSUPPORT:
962 dprintk("RPC: %5u remote rpcbind version unavailable, retrying\n",
963 task->tk_pid);
964 task->tk_status = 0;
965 task->tk_action = call_bind;
966 return;
967 default:
968 dprintk("RPC: %5u unrecognized rpcbind error (%d)\n",
969 task->tk_pid, -task->tk_status);
972 rpc_exit(task, status);
973 return;
975 retry_timeout:
976 task->tk_action = call_timeout;
980 * 4b. Connect to the RPC server
982 static void
983 call_connect(struct rpc_task *task)
985 struct rpc_xprt *xprt = task->tk_xprt;
987 dprintk("RPC: %5u call_connect xprt %p %s connected\n",
988 task->tk_pid, xprt,
989 (xprt_connected(xprt) ? "is" : "is not"));
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);
1001 * 4c. Sort out connect result
1003 static void
1004 call_connect_status(struct rpc_task *task)
1006 struct rpc_clnt *clnt = task->tk_client;
1007 int status = task->tk_status;
1009 dprint_status(task);
1011 task->tk_status = 0;
1012 if (status >= 0) {
1013 clnt->cl_stats->netreconn++;
1014 task->tk_action = call_transmit;
1015 return;
1018 /* Something failed: remote service port may have changed */
1019 rpc_force_rebind(clnt);
1021 switch (status) {
1022 case -ENOTCONN:
1023 case -EAGAIN:
1024 task->tk_action = call_bind;
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;
1032 rpc_exit(task, -EIO);
1036 * 5. Transmit the RPC request, and wait for reply
1038 static void
1039 call_transmit(struct rpc_task *task)
1041 dprint_status(task);
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;
1049 task->tk_action = call_transmit_status;
1050 /* Encode here so that rpcsec_gss can use correct sequence number. */
1051 if (rpc_task_need_encode(task)) {
1052 BUG_ON(task->tk_rqstp->rq_bytes_sent != 0);
1053 call_encode(task);
1054 /* Did the encode result in an error condition? */
1055 if (task->tk_status != 0)
1056 return;
1058 xprt_transmit(task);
1059 if (task->tk_status < 0)
1060 return;
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.
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);
1073 * 5a. Handle cleanup after a transmission
1075 static void
1076 call_transmit_status(struct rpc_task *task)
1078 task->tk_action = call_status;
1080 * Special case: if we've been waiting on the socket's write_space()
1081 * callback, then don't call xprt_end_transmit().
1083 if (task->tk_status == -EAGAIN)
1084 return;
1085 xprt_end_transmit(task);
1086 rpc_task_force_reencode(task);
1090 * 6. Sort out the RPC call status
1092 static void
1093 call_status(struct rpc_task *task)
1095 struct rpc_clnt *clnt = task->tk_client;
1096 struct rpc_rqst *req = task->tk_rqstp;
1097 int status;
1099 if (req->rq_received > 0 && !req->rq_bytes_sent)
1100 task->tk_status = req->rq_received;
1102 dprint_status(task);
1104 status = task->tk_status;
1105 if (status >= 0) {
1106 task->tk_action = call_decode;
1107 return;
1110 task->tk_status = 0;
1111 switch(status) {
1112 case -EHOSTDOWN:
1113 case -EHOSTUNREACH:
1114 case -ENETUNREACH:
1116 * Delay any retries for 3 seconds, then handle as if it
1117 * were a timeout.
1119 rpc_delay(task, 3*HZ);
1120 case -ETIMEDOUT:
1121 task->tk_action = call_timeout;
1122 if (task->tk_client->cl_discrtry)
1123 xprt_force_disconnect(task->tk_xprt);
1124 break;
1125 case -ECONNREFUSED:
1126 case -ENOTCONN:
1127 rpc_force_rebind(clnt);
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:
1138 printk("%s: RPC call returned error %d\n",
1139 clnt->cl_protname, -status);
1140 rpc_exit(task, status);
1145 * 6a. Handle RPC timeout
1146 * We do not release the request slot, so we keep using the
1147 * same XID for all retransmits.
1149 static void
1150 call_timeout(struct rpc_task *task)
1152 struct rpc_clnt *clnt = task->tk_client;
1154 if (xprt_adjust_timeout(task->tk_rqstp) == 0) {
1155 dprintk("RPC: %5u call_timeout (minor)\n", task->tk_pid);
1156 goto retry;
1159 dprintk("RPC: %5u call_timeout (major)\n", task->tk_pid);
1160 task->tk_timeouts++;
1162 if (RPC_IS_SOFT(task)) {
1163 printk(KERN_NOTICE "%s: server %s not responding, timed out\n",
1164 clnt->cl_protname, clnt->cl_server);
1165 rpc_exit(task, -EIO);
1166 return;
1169 if (!(task->tk_flags & RPC_CALL_MAJORSEEN)) {
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);
1174 rpc_force_rebind(clnt);
1176 retry:
1177 clnt->cl_stats->rpcretrans++;
1178 task->tk_action = call_bind;
1179 task->tk_status = 0;
1183 * 7. Decode the RPC reply
1185 static void
1186 call_decode(struct rpc_task *task)
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;
1191 __be32 *p;
1193 dprintk("RPC: %5u call_decode (status %d)\n",
1194 task->tk_pid, task->tk_status);
1196 if (task->tk_flags & RPC_CALL_MAJORSEEN) {
1197 printk(KERN_NOTICE "%s: server %s OK\n",
1198 clnt->cl_protname, clnt->cl_server);
1199 task->tk_flags &= ~RPC_CALL_MAJORSEEN;
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;
1208 dprintk("RPC: %s: too small RPC reply size (%d bytes)\n",
1209 clnt->cl_protname, task->tk_status);
1210 task->tk_action = call_timeout;
1211 goto out_retry;
1215 * Ensure that we see all writes made by xprt_complete_rqst()
1216 * before it changed req->rq_received.
1218 smp_rmb();
1219 req->rq_rcv_buf.len = req->rq_private_buf.len;
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);
1225 /* Verify the RPC header */
1226 p = call_verify(task);
1227 if (IS_ERR(p)) {
1228 if (p == ERR_PTR(-EAGAIN))
1229 goto out_retry;
1230 return;
1233 task->tk_action = rpc_exit_task;
1235 if (decode) {
1236 task->tk_status = rpcauth_unwrap_resp(task, decode, req, p,
1237 task->tk_msg.rpc_resp);
1239 dprintk("RPC: %5u call_decode result %d\n", task->tk_pid,
1240 task->tk_status);
1241 return;
1242 out_retry:
1243 req->rq_received = req->rq_private_buf.len = 0;
1244 task->tk_status = 0;
1245 if (task->tk_client->cl_discrtry)
1246 xprt_force_disconnect(task->tk_xprt);
1250 * 8. Refresh the credentials if rejected by the server
1252 static void
1253 call_refresh(struct rpc_task *task)
1255 dprint_status(task);
1257 task->tk_action = call_refreshresult;
1258 task->tk_status = 0;
1259 task->tk_client->cl_stats->rpcauthrefresh++;
1260 rpcauth_refreshcred(task);
1264 * 8a. Process the results of a credential refresh
1266 static void
1267 call_refreshresult(struct rpc_task *task)
1269 int status = task->tk_status;
1271 dprint_status(task);
1273 task->tk_status = 0;
1274 task->tk_action = call_reserve;
1275 if (status >= 0 && rpcauth_uptodatecred(task))
1276 return;
1277 if (status == -EACCES) {
1278 rpc_exit(task, -EACCES);
1279 return;
1281 task->tk_action = call_refresh;
1282 if (status != -ETIMEDOUT)
1283 rpc_delay(task, 3*HZ);
1284 return;
1288 * Call header serialization
1290 static __be32 *
1291 call_header(struct rpc_task *task)
1293 struct rpc_clnt *clnt = task->tk_client;
1294 struct rpc_rqst *req = task->tk_rqstp;
1295 __be32 *p = req->rq_svec[0].iov_base;
1297 /* FIXME: check buffer size? */
1299 p = xprt_skip_transport_header(task->tk_xprt, p);
1300 *p++ = req->rq_xid; /* XID */
1301 *p++ = htonl(RPC_CALL); /* CALL */
1302 *p++ = htonl(RPC_VERSION); /* RPC version */
1303 *p++ = htonl(clnt->cl_prog); /* program number */
1304 *p++ = htonl(clnt->cl_vers); /* program version */
1305 *p++ = htonl(task->tk_msg.rpc_proc->p_proc); /* procedure */
1306 p = rpcauth_marshcred(task, p);
1307 req->rq_slen = xdr_adjust_iovec(&req->rq_svec[0], p);
1308 return p;
1312 * Reply header verification
1314 static __be32 *
1315 call_verify(struct rpc_task *task)
1317 struct kvec *iov = &task->tk_rqstp->rq_rcv_buf.head[0];
1318 int len = task->tk_rqstp->rq_rcv_buf.len >> 2;
1319 __be32 *p = iov->iov_base;
1320 u32 n;
1321 int error = -EACCES;
1323 if ((task->tk_rqstp->rq_rcv_buf.len & 3) != 0) {
1324 /* RFC-1014 says that the representation of XDR data must be a
1325 * multiple of four bytes
1326 * - if it isn't pointer subtraction in the NFS client may give
1327 * undefined results
1329 dprintk("RPC: %5u %s: XDR representation not a multiple of"
1330 " 4 bytes: 0x%x\n", task->tk_pid, __FUNCTION__,
1331 task->tk_rqstp->rq_rcv_buf.len);
1332 goto out_eio;
1334 if ((len -= 3) < 0)
1335 goto out_overflow;
1336 p += 1; /* skip XID */
1338 if ((n = ntohl(*p++)) != RPC_REPLY) {
1339 dprintk("RPC: %5u %s: not an RPC reply: %x\n",
1340 task->tk_pid, __FUNCTION__, n);
1341 goto out_garbage;
1343 if ((n = ntohl(*p++)) != RPC_MSG_ACCEPTED) {
1344 if (--len < 0)
1345 goto out_overflow;
1346 switch ((n = ntohl(*p++))) {
1347 case RPC_AUTH_ERROR:
1348 break;
1349 case RPC_MISMATCH:
1350 dprintk("RPC: %5u %s: RPC call version "
1351 "mismatch!\n",
1352 task->tk_pid, __FUNCTION__);
1353 error = -EPROTONOSUPPORT;
1354 goto out_err;
1355 default:
1356 dprintk("RPC: %5u %s: RPC call rejected, "
1357 "unknown error: %x\n",
1358 task->tk_pid, __FUNCTION__, n);
1359 goto out_eio;
1361 if (--len < 0)
1362 goto out_overflow;
1363 switch ((n = ntohl(*p++))) {
1364 case RPC_AUTH_REJECTEDCRED:
1365 case RPC_AUTH_REJECTEDVERF:
1366 case RPCSEC_GSS_CREDPROBLEM:
1367 case RPCSEC_GSS_CTXPROBLEM:
1368 if (!task->tk_cred_retry)
1369 break;
1370 task->tk_cred_retry--;
1371 dprintk("RPC: %5u %s: retry stale creds\n",
1372 task->tk_pid, __FUNCTION__);
1373 rpcauth_invalcred(task);
1374 /* Ensure we obtain a new XID! */
1375 xprt_release(task);
1376 task->tk_action = call_refresh;
1377 goto out_retry;
1378 case RPC_AUTH_BADCRED:
1379 case RPC_AUTH_BADVERF:
1380 /* possibly garbled cred/verf? */
1381 if (!task->tk_garb_retry)
1382 break;
1383 task->tk_garb_retry--;
1384 dprintk("RPC: %5u %s: retry garbled creds\n",
1385 task->tk_pid, __FUNCTION__);
1386 task->tk_action = call_bind;
1387 goto out_retry;
1388 case RPC_AUTH_TOOWEAK:
1389 printk(KERN_NOTICE "call_verify: server %s requires stronger "
1390 "authentication.\n", task->tk_client->cl_server);
1391 break;
1392 default:
1393 dprintk("RPC: %5u %s: unknown auth error: %x\n",
1394 task->tk_pid, __FUNCTION__, n);
1395 error = -EIO;
1397 dprintk("RPC: %5u %s: call rejected %d\n",
1398 task->tk_pid, __FUNCTION__, n);
1399 goto out_err;
1401 if (!(p = rpcauth_checkverf(task, p))) {
1402 dprintk("RPC: %5u %s: auth check failed\n",
1403 task->tk_pid, __FUNCTION__);
1404 goto out_garbage; /* bad verifier, retry */
1406 len = p - (__be32 *)iov->iov_base - 1;
1407 if (len < 0)
1408 goto out_overflow;
1409 switch ((n = ntohl(*p++))) {
1410 case RPC_SUCCESS:
1411 return p;
1412 case RPC_PROG_UNAVAIL:
1413 dprintk("RPC: %5u %s: program %u is unsupported by server %s\n",
1414 task->tk_pid, __FUNCTION__,
1415 (unsigned int)task->tk_client->cl_prog,
1416 task->tk_client->cl_server);
1417 error = -EPFNOSUPPORT;
1418 goto out_err;
1419 case RPC_PROG_MISMATCH:
1420 dprintk("RPC: %5u %s: program %u, version %u unsupported by "
1421 "server %s\n", task->tk_pid, __FUNCTION__,
1422 (unsigned int)task->tk_client->cl_prog,
1423 (unsigned int)task->tk_client->cl_vers,
1424 task->tk_client->cl_server);
1425 error = -EPROTONOSUPPORT;
1426 goto out_err;
1427 case RPC_PROC_UNAVAIL:
1428 dprintk("RPC: %5u %s: proc %p unsupported by program %u, "
1429 "version %u on server %s\n",
1430 task->tk_pid, __FUNCTION__,
1431 task->tk_msg.rpc_proc,
1432 task->tk_client->cl_prog,
1433 task->tk_client->cl_vers,
1434 task->tk_client->cl_server);
1435 error = -EOPNOTSUPP;
1436 goto out_err;
1437 case RPC_GARBAGE_ARGS:
1438 dprintk("RPC: %5u %s: server saw garbage\n",
1439 task->tk_pid, __FUNCTION__);
1440 break; /* retry */
1441 default:
1442 dprintk("RPC: %5u %s: server accept status: %x\n",
1443 task->tk_pid, __FUNCTION__, n);
1444 /* Also retry */
1447 out_garbage:
1448 task->tk_client->cl_stats->rpcgarbage++;
1449 if (task->tk_garb_retry) {
1450 task->tk_garb_retry--;
1451 dprintk("RPC: %5u %s: retrying\n",
1452 task->tk_pid, __FUNCTION__);
1453 task->tk_action = call_bind;
1454 out_retry:
1455 return ERR_PTR(-EAGAIN);
1457 out_eio:
1458 error = -EIO;
1459 out_err:
1460 rpc_exit(task, error);
1461 dprintk("RPC: %5u %s: call failed with error %d\n", task->tk_pid,
1462 __FUNCTION__, error);
1463 return ERR_PTR(error);
1464 out_overflow:
1465 dprintk("RPC: %5u %s: server reply was truncated.\n", task->tk_pid,
1466 __FUNCTION__);
1467 goto out_garbage;
1470 static int rpcproc_encode_null(void *rqstp, __be32 *data, void *obj)
1472 return 0;
1475 static int rpcproc_decode_null(void *rqstp, __be32 *data, void *obj)
1477 return 0;
1480 static struct rpc_procinfo rpcproc_null = {
1481 .p_encode = rpcproc_encode_null,
1482 .p_decode = rpcproc_decode_null,
1485 static int rpc_ping(struct rpc_clnt *clnt, int flags)
1487 struct rpc_message msg = {
1488 .rpc_proc = &rpcproc_null,
1490 int err;
1491 msg.rpc_cred = authnull_ops.lookup_cred(NULL, NULL, 0);
1492 err = rpc_call_sync(clnt, &msg, flags);
1493 put_rpccred(msg.rpc_cred);
1494 return err;
1497 struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred, int flags)
1499 struct rpc_message msg = {
1500 .rpc_proc = &rpcproc_null,
1501 .rpc_cred = cred,
1503 struct rpc_task_setup task_setup_data = {
1504 .rpc_client = clnt,
1505 .rpc_message = &msg,
1506 .callback_ops = &rpc_default_ops,
1507 .flags = flags,
1509 return rpc_run_task(&task_setup_data);
1511 EXPORT_SYMBOL_GPL(rpc_call_null);
1513 #ifdef RPC_DEBUG
1514 void rpc_show_tasks(void)
1516 struct rpc_clnt *clnt;
1517 struct rpc_task *t;
1519 spin_lock(&rpc_client_lock);
1520 if (list_empty(&all_clients))
1521 goto out;
1522 printk("-pid- proc flgs status -client- -prog- --rqstp- -timeout "
1523 "-rpcwait -action- ---ops--\n");
1524 list_for_each_entry(clnt, &all_clients, cl_clients) {
1525 if (list_empty(&clnt->cl_tasks))
1526 continue;
1527 spin_lock(&clnt->cl_lock);
1528 list_for_each_entry(t, &clnt->cl_tasks, tk_task) {
1529 const char *rpc_waitq = "none";
1530 int proc;
1532 if (t->tk_msg.rpc_proc)
1533 proc = t->tk_msg.rpc_proc->p_proc;
1534 else
1535 proc = -1;
1537 if (RPC_IS_QUEUED(t))
1538 rpc_waitq = rpc_qname(t->u.tk_wait.rpc_waitq);
1540 printk("%5u %04d %04x %6d %8p %6d %8p %8ld %8s %8p %8p\n",
1541 t->tk_pid, proc,
1542 t->tk_flags, t->tk_status,
1543 t->tk_client,
1544 (t->tk_client ? t->tk_client->cl_prog : 0),
1545 t->tk_rqstp, t->tk_timeout,
1546 rpc_waitq,
1547 t->tk_action, t->tk_ops);
1549 spin_unlock(&clnt->cl_lock);
1551 out:
1552 spin_unlock(&rpc_client_lock);
1554 #endif