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/kallsyms.h>
30 #include <linux/namei.h>
31 #include <linux/mount.h>
32 #include <linux/slab.h>
33 #include <linux/utsname.h>
34 #include <linux/workqueue.h>
35 #include <linux/in6.h>
37 #include <linux/sunrpc/clnt.h>
38 #include <linux/sunrpc/rpc_pipe_fs.h>
39 #include <linux/sunrpc/metrics.h>
40 #include <linux/sunrpc/bc_xprt.h>
45 # define RPCDBG_FACILITY RPCDBG_CALL
48 #define dprint_status(t) \
49 dprintk("RPC: %5u %s (status %d)\n", t->tk_pid, \
50 __func__, t->tk_status)
53 * All RPC clients are linked into this list
55 static LIST_HEAD(all_clients);
56 static DEFINE_SPINLOCK(rpc_client_lock);
58 static DECLARE_WAIT_QUEUE_HEAD(destroy_wait);
61 static void call_start(struct rpc_task *task);
62 static void call_reserve(struct rpc_task *task);
63 static void call_reserveresult(struct rpc_task *task);
64 static void call_allocate(struct rpc_task *task);
65 static void call_decode(struct rpc_task *task);
66 static void call_bind(struct rpc_task *task);
67 static void call_bind_status(struct rpc_task *task);
68 static void call_transmit(struct rpc_task *task);
69 #if defined(CONFIG_NFS_V4_1)
70 static void call_bc_transmit(struct rpc_task *task);
71 #endif /* CONFIG_NFS_V4_1 */
72 static void call_status(struct rpc_task *task);
73 static void call_transmit_status(struct rpc_task *task);
74 static void call_refresh(struct rpc_task *task);
75 static void call_refreshresult(struct rpc_task *task);
76 static void call_timeout(struct rpc_task *task);
77 static void call_connect(struct rpc_task *task);
78 static void call_connect_status(struct rpc_task *task);
80 static __be32 *rpc_encode_header(struct rpc_task *task);
81 static __be32 *rpc_verify_header(struct rpc_task *task);
82 static int rpc_ping(struct rpc_clnt *clnt);
84 static void rpc_register_client(struct rpc_clnt *clnt)
86 spin_lock(&rpc_client_lock);
87 list_add(&clnt->cl_clients, &all_clients);
88 spin_unlock(&rpc_client_lock);
91 static void rpc_unregister_client(struct rpc_clnt *clnt)
93 spin_lock(&rpc_client_lock);
94 list_del(&clnt->cl_clients);
95 spin_unlock(&rpc_client_lock);
99 rpc_setup_pipedir(struct rpc_clnt *clnt, char *dir_name)
101 static uint32_t clntid;
110 clnt->cl_path.mnt = ERR_PTR(-ENOENT);
111 clnt->cl_path.dentry = ERR_PTR(-ENOENT);
112 if (dir_name == NULL)
115 path.mnt = rpc_get_mount();
116 if (IS_ERR(path.mnt))
117 return PTR_ERR(path.mnt);
118 error = vfs_path_lookup(path.mnt->mnt_root, path.mnt, dir_name, 0, &nd);
123 q.len = snprintf(name, sizeof(name), "clnt%x", (unsigned int)clntid++);
124 name[sizeof(name) - 1] = '\0';
125 q.hash = full_name_hash(q.name, q.len);
126 path.dentry = rpc_create_client_dir(nd.path.dentry, &q, clnt);
127 if (!IS_ERR(path.dentry))
129 error = PTR_ERR(path.dentry);
130 if (error != -EEXIST) {
131 printk(KERN_INFO "RPC: Couldn't create pipefs entry"
132 " %s/%s, error %d\n",
133 dir_name, name, error);
138 clnt->cl_path = path;
147 static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args, struct rpc_xprt *xprt)
149 struct rpc_program *program = args->program;
150 struct rpc_version *version;
151 struct rpc_clnt *clnt = NULL;
152 struct rpc_auth *auth;
156 /* sanity check the name before trying to print it */
158 len = strlen(args->servername);
159 if (len > RPC_MAXNETNAMELEN)
163 dprintk("RPC: creating %s client for %s (xprt %p)\n",
164 program->name, args->servername, xprt);
173 if (args->version >= program->nrvers)
175 version = program->version[args->version];
180 clnt = kzalloc(sizeof(*clnt), GFP_KERNEL);
183 clnt->cl_parent = clnt;
185 clnt->cl_server = clnt->cl_inline_name;
186 if (len > sizeof(clnt->cl_inline_name)) {
187 char *buf = kmalloc(len, GFP_KERNEL);
189 clnt->cl_server = buf;
191 len = sizeof(clnt->cl_inline_name);
193 strlcpy(clnt->cl_server, args->servername, len);
195 clnt->cl_xprt = xprt;
196 clnt->cl_procinfo = version->procs;
197 clnt->cl_maxproc = version->nrprocs;
198 clnt->cl_protname = program->name;
199 clnt->cl_prog = args->prognumber ? : program->number;
200 clnt->cl_vers = version->number;
201 clnt->cl_stats = program->stats;
202 clnt->cl_metrics = rpc_alloc_iostats(clnt);
204 if (clnt->cl_metrics == NULL)
206 clnt->cl_program = program;
207 INIT_LIST_HEAD(&clnt->cl_tasks);
208 spin_lock_init(&clnt->cl_lock);
210 if (!xprt_bound(clnt->cl_xprt))
211 clnt->cl_autobind = 1;
213 clnt->cl_timeout = xprt->timeout;
214 if (args->timeout != NULL) {
215 memcpy(&clnt->cl_timeout_default, args->timeout,
216 sizeof(clnt->cl_timeout_default));
217 clnt->cl_timeout = &clnt->cl_timeout_default;
220 clnt->cl_rtt = &clnt->cl_rtt_default;
221 rpc_init_rtt(&clnt->cl_rtt_default, clnt->cl_timeout->to_initval);
222 clnt->cl_principal = NULL;
223 if (args->client_name) {
224 clnt->cl_principal = kstrdup(args->client_name, GFP_KERNEL);
225 if (!clnt->cl_principal)
226 goto out_no_principal;
229 atomic_set(&clnt->cl_count, 1);
231 err = rpc_setup_pipedir(clnt, program->pipe_dir_name);
235 auth = rpcauth_create(args->authflavor, clnt);
237 printk(KERN_INFO "RPC: Couldn't create auth handle (flavor %u)\n",
243 /* save the nodename */
244 clnt->cl_nodelen = strlen(init_utsname()->nodename);
245 if (clnt->cl_nodelen > UNX_MAXNODENAME)
246 clnt->cl_nodelen = UNX_MAXNODENAME;
247 memcpy(clnt->cl_nodename, init_utsname()->nodename, clnt->cl_nodelen);
248 rpc_register_client(clnt);
252 if (!IS_ERR(clnt->cl_path.dentry)) {
253 rpc_remove_client_dir(clnt->cl_path.dentry);
257 kfree(clnt->cl_principal);
259 rpc_free_iostats(clnt->cl_metrics);
261 if (clnt->cl_server != clnt->cl_inline_name)
262 kfree(clnt->cl_server);
273 * rpc_create - create an RPC client and transport with one call
274 * @args: rpc_clnt create argument structure
276 * Creates and initializes an RPC transport and an RPC client.
278 * It can ping the server in order to determine if it is up, and to see if
279 * it supports this program and version. RPC_CLNT_CREATE_NOPING disables
280 * this behavior so asynchronous tasks can also use rpc_create.
282 struct rpc_clnt *rpc_create(struct rpc_create_args *args)
284 struct rpc_xprt *xprt;
285 struct rpc_clnt *clnt;
286 struct xprt_create xprtargs = {
288 .ident = args->protocol,
289 .srcaddr = args->saddress,
290 .dstaddr = args->address,
291 .addrlen = args->addrsize,
292 .bc_xprt = args->bc_xprt,
297 * If the caller chooses not to specify a hostname, whip
298 * up a string representation of the passed-in address.
300 if (args->servername == NULL) {
301 servername[0] = '\0';
302 switch (args->address->sa_family) {
304 struct sockaddr_in *sin =
305 (struct sockaddr_in *)args->address;
306 snprintf(servername, sizeof(servername), "%pI4",
307 &sin->sin_addr.s_addr);
311 struct sockaddr_in6 *sin =
312 (struct sockaddr_in6 *)args->address;
313 snprintf(servername, sizeof(servername), "%pI6",
318 /* caller wants default server name, but
319 * address family isn't recognized. */
320 return ERR_PTR(-EINVAL);
322 args->servername = servername;
325 xprt = xprt_create_transport(&xprtargs);
327 return (struct rpc_clnt *)xprt;
330 * By default, kernel RPC client connects from a reserved port.
331 * CAP_NET_BIND_SERVICE will not be set for unprivileged requesters,
332 * but it is always enabled for rpciod, which handles the connect
336 if (args->flags & RPC_CLNT_CREATE_NONPRIVPORT)
339 clnt = rpc_new_client(args, xprt);
343 if (!(args->flags & RPC_CLNT_CREATE_NOPING)) {
344 int err = rpc_ping(clnt);
346 rpc_shutdown_client(clnt);
351 clnt->cl_softrtry = 1;
352 if (args->flags & RPC_CLNT_CREATE_HARDRTRY)
353 clnt->cl_softrtry = 0;
355 if (args->flags & RPC_CLNT_CREATE_AUTOBIND)
356 clnt->cl_autobind = 1;
357 if (args->flags & RPC_CLNT_CREATE_DISCRTRY)
358 clnt->cl_discrtry = 1;
359 if (!(args->flags & RPC_CLNT_CREATE_QUIET))
364 EXPORT_SYMBOL_GPL(rpc_create);
367 * This function clones the RPC client structure. It allows us to share the
368 * same transport while varying parameters such as the authentication
372 rpc_clone_client(struct rpc_clnt *clnt)
374 struct rpc_clnt *new;
377 new = kmemdup(clnt, sizeof(*new), GFP_KERNEL);
380 new->cl_parent = clnt;
381 /* Turn off autobind on clones */
382 new->cl_autobind = 0;
383 INIT_LIST_HEAD(&new->cl_tasks);
384 spin_lock_init(&new->cl_lock);
385 rpc_init_rtt(&new->cl_rtt_default, clnt->cl_timeout->to_initval);
386 new->cl_metrics = rpc_alloc_iostats(clnt);
387 if (new->cl_metrics == NULL)
389 if (clnt->cl_principal) {
390 new->cl_principal = kstrdup(clnt->cl_principal, GFP_KERNEL);
391 if (new->cl_principal == NULL)
392 goto out_no_principal;
394 atomic_set(&new->cl_count, 1);
395 err = rpc_setup_pipedir(new, clnt->cl_program->pipe_dir_name);
399 atomic_inc(&new->cl_auth->au_count);
400 xprt_get(clnt->cl_xprt);
401 atomic_inc(&clnt->cl_count);
402 rpc_register_client(new);
406 kfree(new->cl_principal);
408 rpc_free_iostats(new->cl_metrics);
412 dprintk("RPC: %s: returned error %d\n", __func__, err);
415 EXPORT_SYMBOL_GPL(rpc_clone_client);
418 * Kill all tasks for the given client.
419 * XXX: kill their descendants as well?
421 void rpc_killall_tasks(struct rpc_clnt *clnt)
423 struct rpc_task *rovr;
426 if (list_empty(&clnt->cl_tasks))
428 dprintk("RPC: killing all tasks for client %p\n", clnt);
430 * Spin lock all_tasks to prevent changes...
432 spin_lock(&clnt->cl_lock);
433 list_for_each_entry(rovr, &clnt->cl_tasks, tk_task) {
434 if (!RPC_IS_ACTIVATED(rovr))
436 if (!(rovr->tk_flags & RPC_TASK_KILLED)) {
437 rovr->tk_flags |= RPC_TASK_KILLED;
438 rpc_exit(rovr, -EIO);
439 if (RPC_IS_QUEUED(rovr))
440 rpc_wake_up_queued_task(rovr->tk_waitqueue,
444 spin_unlock(&clnt->cl_lock);
446 EXPORT_SYMBOL_GPL(rpc_killall_tasks);
449 * Properly shut down an RPC client, terminating all outstanding
452 void rpc_shutdown_client(struct rpc_clnt *clnt)
454 dprintk("RPC: shutting down %s client for %s\n",
455 clnt->cl_protname, clnt->cl_server);
457 while (!list_empty(&clnt->cl_tasks)) {
458 rpc_killall_tasks(clnt);
459 wait_event_timeout(destroy_wait,
460 list_empty(&clnt->cl_tasks), 1*HZ);
463 rpc_release_client(clnt);
465 EXPORT_SYMBOL_GPL(rpc_shutdown_client);
471 rpc_free_client(struct rpc_clnt *clnt)
473 dprintk("RPC: destroying %s client for %s\n",
474 clnt->cl_protname, clnt->cl_server);
475 if (!IS_ERR(clnt->cl_path.dentry)) {
476 rpc_remove_client_dir(clnt->cl_path.dentry);
479 if (clnt->cl_parent != clnt) {
480 rpc_release_client(clnt->cl_parent);
483 if (clnt->cl_server != clnt->cl_inline_name)
484 kfree(clnt->cl_server);
486 rpc_unregister_client(clnt);
487 rpc_free_iostats(clnt->cl_metrics);
488 kfree(clnt->cl_principal);
489 clnt->cl_metrics = NULL;
490 xprt_put(clnt->cl_xprt);
499 rpc_free_auth(struct rpc_clnt *clnt)
501 if (clnt->cl_auth == NULL) {
502 rpc_free_client(clnt);
507 * Note: RPCSEC_GSS may need to send NULL RPC calls in order to
508 * release remaining GSS contexts. This mechanism ensures
509 * that it can do so safely.
511 atomic_inc(&clnt->cl_count);
512 rpcauth_release(clnt->cl_auth);
513 clnt->cl_auth = NULL;
514 if (atomic_dec_and_test(&clnt->cl_count))
515 rpc_free_client(clnt);
519 * Release reference to the RPC client
522 rpc_release_client(struct rpc_clnt *clnt)
524 dprintk("RPC: rpc_release_client(%p)\n", clnt);
526 if (list_empty(&clnt->cl_tasks))
527 wake_up(&destroy_wait);
528 if (atomic_dec_and_test(&clnt->cl_count))
533 * rpc_bind_new_program - bind a new RPC program to an existing client
534 * @old: old rpc_client
535 * @program: rpc program to set
536 * @vers: rpc program version
538 * Clones the rpc client and sets up a new RPC program. This is mainly
539 * of use for enabling different RPC programs to share the same transport.
540 * The Sun NFSv2/v3 ACL protocol can do this.
542 struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *old,
543 struct rpc_program *program,
546 struct rpc_clnt *clnt;
547 struct rpc_version *version;
550 BUG_ON(vers >= program->nrvers || !program->version[vers]);
551 version = program->version[vers];
552 clnt = rpc_clone_client(old);
555 clnt->cl_procinfo = version->procs;
556 clnt->cl_maxproc = version->nrprocs;
557 clnt->cl_protname = program->name;
558 clnt->cl_prog = program->number;
559 clnt->cl_vers = version->number;
560 clnt->cl_stats = program->stats;
561 err = rpc_ping(clnt);
563 rpc_shutdown_client(clnt);
569 EXPORT_SYMBOL_GPL(rpc_bind_new_program);
571 void rpc_task_release_client(struct rpc_task *task)
573 struct rpc_clnt *clnt = task->tk_client;
576 /* Remove from client task list */
577 spin_lock(&clnt->cl_lock);
578 list_del(&task->tk_task);
579 spin_unlock(&clnt->cl_lock);
580 task->tk_client = NULL;
582 rpc_release_client(clnt);
587 void rpc_task_set_client(struct rpc_task *task, struct rpc_clnt *clnt)
590 rpc_task_release_client(task);
591 task->tk_client = clnt;
592 atomic_inc(&clnt->cl_count);
593 if (clnt->cl_softrtry)
594 task->tk_flags |= RPC_TASK_SOFT;
595 /* Add to the client's list of all tasks */
596 spin_lock(&clnt->cl_lock);
597 list_add_tail(&task->tk_task, &clnt->cl_tasks);
598 spin_unlock(&clnt->cl_lock);
603 rpc_task_set_rpc_message(struct rpc_task *task, const struct rpc_message *msg)
606 task->tk_msg.rpc_proc = msg->rpc_proc;
607 task->tk_msg.rpc_argp = msg->rpc_argp;
608 task->tk_msg.rpc_resp = msg->rpc_resp;
609 if (msg->rpc_cred != NULL)
610 task->tk_msg.rpc_cred = get_rpccred(msg->rpc_cred);
615 * Default callback for async RPC calls
618 rpc_default_callback(struct rpc_task *task, void *data)
622 static const struct rpc_call_ops rpc_default_ops = {
623 .rpc_call_done = rpc_default_callback,
627 * rpc_run_task - Allocate a new RPC task, then run rpc_execute against it
628 * @task_setup_data: pointer to task initialisation data
630 struct rpc_task *rpc_run_task(const struct rpc_task_setup *task_setup_data)
632 struct rpc_task *task;
634 task = rpc_new_task(task_setup_data);
638 rpc_task_set_client(task, task_setup_data->rpc_client);
639 rpc_task_set_rpc_message(task, task_setup_data->rpc_message);
641 if (task->tk_status != 0) {
642 int ret = task->tk_status;
647 if (task->tk_action == NULL)
648 rpc_call_start(task);
650 atomic_inc(&task->tk_count);
655 EXPORT_SYMBOL_GPL(rpc_run_task);
658 * rpc_call_sync - Perform a synchronous RPC call
659 * @clnt: pointer to RPC client
660 * @msg: RPC call parameters
661 * @flags: RPC call flags
663 int rpc_call_sync(struct rpc_clnt *clnt, const struct rpc_message *msg, int flags)
665 struct rpc_task *task;
666 struct rpc_task_setup task_setup_data = {
669 .callback_ops = &rpc_default_ops,
674 BUG_ON(flags & RPC_TASK_ASYNC);
676 task = rpc_run_task(&task_setup_data);
678 return PTR_ERR(task);
679 status = task->tk_status;
683 EXPORT_SYMBOL_GPL(rpc_call_sync);
686 * rpc_call_async - Perform an asynchronous RPC call
687 * @clnt: pointer to RPC client
688 * @msg: RPC call parameters
689 * @flags: RPC call flags
690 * @tk_ops: RPC call ops
691 * @data: user call data
694 rpc_call_async(struct rpc_clnt *clnt, const struct rpc_message *msg, int flags,
695 const struct rpc_call_ops *tk_ops, void *data)
697 struct rpc_task *task;
698 struct rpc_task_setup task_setup_data = {
701 .callback_ops = tk_ops,
702 .callback_data = data,
703 .flags = flags|RPC_TASK_ASYNC,
706 task = rpc_run_task(&task_setup_data);
708 return PTR_ERR(task);
712 EXPORT_SYMBOL_GPL(rpc_call_async);
714 #if defined(CONFIG_NFS_V4_1)
716 * rpc_run_bc_task - Allocate a new RPC task for backchannel use, then run
717 * rpc_execute against it
719 * @tk_ops: RPC call ops
721 struct rpc_task *rpc_run_bc_task(struct rpc_rqst *req,
722 const struct rpc_call_ops *tk_ops)
724 struct rpc_task *task;
725 struct xdr_buf *xbufp = &req->rq_snd_buf;
726 struct rpc_task_setup task_setup_data = {
727 .callback_ops = tk_ops,
730 dprintk("RPC: rpc_run_bc_task req= %p\n", req);
732 * Create an rpc_task to send the data
734 task = rpc_new_task(&task_setup_data);
736 xprt_free_bc_request(req);
739 task->tk_rqstp = req;
742 * Set up the xdr_buf length.
743 * This also indicates that the buffer is XDR encoded already.
745 xbufp->len = xbufp->head[0].iov_len + xbufp->page_len +
746 xbufp->tail[0].iov_len;
748 task->tk_action = call_bc_transmit;
749 atomic_inc(&task->tk_count);
750 BUG_ON(atomic_read(&task->tk_count) != 2);
754 dprintk("RPC: rpc_run_bc_task: task= %p\n", task);
757 #endif /* CONFIG_NFS_V4_1 */
760 rpc_call_start(struct rpc_task *task)
762 task->tk_action = call_start;
764 EXPORT_SYMBOL_GPL(rpc_call_start);
767 * rpc_peeraddr - extract remote peer address from clnt's xprt
768 * @clnt: RPC client structure
769 * @buf: target buffer
770 * @bufsize: length of target buffer
772 * Returns the number of bytes that are actually in the stored address.
774 size_t rpc_peeraddr(struct rpc_clnt *clnt, struct sockaddr *buf, size_t bufsize)
777 struct rpc_xprt *xprt = clnt->cl_xprt;
779 bytes = sizeof(xprt->addr);
782 memcpy(buf, &clnt->cl_xprt->addr, bytes);
783 return xprt->addrlen;
785 EXPORT_SYMBOL_GPL(rpc_peeraddr);
788 * rpc_peeraddr2str - return remote peer address in printable format
789 * @clnt: RPC client structure
790 * @format: address format
793 const char *rpc_peeraddr2str(struct rpc_clnt *clnt,
794 enum rpc_display_format_t format)
796 struct rpc_xprt *xprt = clnt->cl_xprt;
798 if (xprt->address_strings[format] != NULL)
799 return xprt->address_strings[format];
801 return "unprintable";
803 EXPORT_SYMBOL_GPL(rpc_peeraddr2str);
806 rpc_setbufsize(struct rpc_clnt *clnt, unsigned int sndsize, unsigned int rcvsize)
808 struct rpc_xprt *xprt = clnt->cl_xprt;
809 if (xprt->ops->set_buffer_size)
810 xprt->ops->set_buffer_size(xprt, sndsize, rcvsize);
812 EXPORT_SYMBOL_GPL(rpc_setbufsize);
815 * Return size of largest payload RPC client can support, in bytes
817 * For stream transports, this is one RPC record fragment (see RFC
818 * 1831), as we don't support multi-record requests yet. For datagram
819 * transports, this is the size of an IP packet minus the IP, UDP, and
822 size_t rpc_max_payload(struct rpc_clnt *clnt)
824 return clnt->cl_xprt->max_payload;
826 EXPORT_SYMBOL_GPL(rpc_max_payload);
829 * rpc_force_rebind - force transport to check that remote port is unchanged
830 * @clnt: client to rebind
833 void rpc_force_rebind(struct rpc_clnt *clnt)
835 if (clnt->cl_autobind)
836 xprt_clear_bound(clnt->cl_xprt);
838 EXPORT_SYMBOL_GPL(rpc_force_rebind);
841 * Restart an (async) RPC call from the call_prepare state.
842 * Usually called from within the exit handler.
845 rpc_restart_call_prepare(struct rpc_task *task)
847 if (RPC_ASSASSINATED(task))
849 task->tk_action = rpc_prepare_task;
852 EXPORT_SYMBOL_GPL(rpc_restart_call_prepare);
855 * Restart an (async) RPC call. Usually called from within the
859 rpc_restart_call(struct rpc_task *task)
861 if (RPC_ASSASSINATED(task))
863 task->tk_action = call_start;
866 EXPORT_SYMBOL_GPL(rpc_restart_call);
869 static const char *rpc_proc_name(const struct rpc_task *task)
871 const struct rpc_procinfo *proc = task->tk_msg.rpc_proc;
886 * Other FSM states can be visited zero or more times, but
887 * this state is visited exactly once for each RPC.
890 call_start(struct rpc_task *task)
892 struct rpc_clnt *clnt = task->tk_client;
894 dprintk("RPC: %5u call_start %s%d proc %s (%s)\n", task->tk_pid,
895 clnt->cl_protname, clnt->cl_vers,
897 (RPC_IS_ASYNC(task) ? "async" : "sync"));
899 /* Increment call count */
900 task->tk_msg.rpc_proc->p_count++;
901 clnt->cl_stats->rpccnt++;
902 task->tk_action = call_reserve;
906 * 1. Reserve an RPC call slot
909 call_reserve(struct rpc_task *task)
914 task->tk_action = call_reserveresult;
919 * 1b. Grok the result of xprt_reserve()
922 call_reserveresult(struct rpc_task *task)
924 int status = task->tk_status;
929 * After a call to xprt_reserve(), we must have either
930 * a request slot or else an error status.
934 if (task->tk_rqstp) {
935 task->tk_action = call_refresh;
939 printk(KERN_ERR "%s: status=%d, but no request slot, exiting\n",
941 rpc_exit(task, -EIO);
946 * Even though there was an error, we may have acquired
947 * a request slot somehow. Make sure not to leak it.
949 if (task->tk_rqstp) {
950 printk(KERN_ERR "%s: status=%d, request allocated anyway\n",
956 case -EAGAIN: /* woken up; retry */
957 task->tk_action = call_reserve;
959 case -EIO: /* probably a shutdown */
962 printk(KERN_ERR "%s: unrecognized error %d, exiting\n",
966 rpc_exit(task, status);
970 * 2. Bind and/or refresh the credentials
973 call_refresh(struct rpc_task *task)
977 task->tk_action = call_refreshresult;
979 task->tk_client->cl_stats->rpcauthrefresh++;
980 rpcauth_refreshcred(task);
984 * 2a. Process the results of a credential refresh
987 call_refreshresult(struct rpc_task *task)
989 int status = task->tk_status;
994 task->tk_action = call_refresh;
997 if (rpcauth_uptodatecred(task))
998 task->tk_action = call_allocate;
1001 rpc_delay(task, 3*HZ);
1004 if (!task->tk_cred_retry)
1006 task->tk_cred_retry--;
1007 dprintk("RPC: %5u %s: retry refresh creds\n",
1008 task->tk_pid, __func__);
1011 dprintk("RPC: %5u %s: refresh creds failed with error %d\n",
1012 task->tk_pid, __func__, status);
1013 rpc_exit(task, status);
1017 * 2b. Allocate the buffer. For details, see sched.c:rpc_malloc.
1018 * (Note: buffer memory is freed in xprt_release).
1021 call_allocate(struct rpc_task *task)
1023 unsigned int slack = task->tk_rqstp->rq_cred->cr_auth->au_cslack;
1024 struct rpc_rqst *req = task->tk_rqstp;
1025 struct rpc_xprt *xprt = task->tk_xprt;
1026 struct rpc_procinfo *proc = task->tk_msg.rpc_proc;
1028 dprint_status(task);
1030 task->tk_status = 0;
1031 task->tk_action = call_bind;
1036 if (proc->p_proc != 0) {
1037 BUG_ON(proc->p_arglen == 0);
1038 if (proc->p_decode != NULL)
1039 BUG_ON(proc->p_replen == 0);
1043 * Calculate the size (in quads) of the RPC call
1044 * and reply headers, and convert both values
1047 req->rq_callsize = RPC_CALLHDRSIZE + (slack << 1) + proc->p_arglen;
1048 req->rq_callsize <<= 2;
1049 req->rq_rcvsize = RPC_REPHDRSIZE + slack + proc->p_replen;
1050 req->rq_rcvsize <<= 2;
1052 req->rq_buffer = xprt->ops->buf_alloc(task,
1053 req->rq_callsize + req->rq_rcvsize);
1054 if (req->rq_buffer != NULL)
1057 dprintk("RPC: %5u rpc_buffer allocation failed\n", task->tk_pid);
1059 if (RPC_IS_ASYNC(task) || !signalled()) {
1060 task->tk_action = call_allocate;
1061 rpc_delay(task, HZ>>4);
1065 rpc_exit(task, -ERESTARTSYS);
1069 rpc_task_need_encode(struct rpc_task *task)
1071 return task->tk_rqstp->rq_snd_buf.len == 0;
1075 rpc_task_force_reencode(struct rpc_task *task)
1077 task->tk_rqstp->rq_snd_buf.len = 0;
1078 task->tk_rqstp->rq_bytes_sent = 0;
1082 rpc_xdr_buf_init(struct xdr_buf *buf, void *start, size_t len)
1084 buf->head[0].iov_base = start;
1085 buf->head[0].iov_len = len;
1086 buf->tail[0].iov_len = 0;
1094 * 3. Encode arguments of an RPC call
1097 rpc_xdr_encode(struct rpc_task *task)
1099 struct rpc_rqst *req = task->tk_rqstp;
1103 dprint_status(task);
1105 rpc_xdr_buf_init(&req->rq_snd_buf,
1108 rpc_xdr_buf_init(&req->rq_rcv_buf,
1109 (char *)req->rq_buffer + req->rq_callsize,
1112 p = rpc_encode_header(task);
1114 printk(KERN_INFO "RPC: couldn't encode RPC header, exit EIO\n");
1115 rpc_exit(task, -EIO);
1119 encode = task->tk_msg.rpc_proc->p_encode;
1123 task->tk_status = rpcauth_wrap_req(task, encode, req, p,
1124 task->tk_msg.rpc_argp);
1128 * 4. Get the server port number if not yet set
1131 call_bind(struct rpc_task *task)
1133 struct rpc_xprt *xprt = task->tk_xprt;
1135 dprint_status(task);
1137 task->tk_action = call_connect;
1138 if (!xprt_bound(xprt)) {
1139 task->tk_action = call_bind_status;
1140 task->tk_timeout = xprt->bind_timeout;
1141 xprt->ops->rpcbind(task);
1146 * 4a. Sort out bind result
1149 call_bind_status(struct rpc_task *task)
1153 if (task->tk_status >= 0) {
1154 dprint_status(task);
1155 task->tk_status = 0;
1156 task->tk_action = call_connect;
1160 switch (task->tk_status) {
1162 dprintk("RPC: %5u rpcbind out of memory\n", task->tk_pid);
1163 rpc_delay(task, HZ >> 2);
1166 dprintk("RPC: %5u remote rpcbind: RPC program/version "
1167 "unavailable\n", task->tk_pid);
1168 /* fail immediately if this is an RPC ping */
1169 if (task->tk_msg.rpc_proc->p_proc == 0) {
1170 status = -EOPNOTSUPP;
1173 rpc_delay(task, 3*HZ);
1176 dprintk("RPC: %5u rpcbind request timed out\n",
1180 /* server doesn't support any rpcbind version we know of */
1181 dprintk("RPC: %5u unrecognized remote rpcbind service\n",
1184 case -EPROTONOSUPPORT:
1185 dprintk("RPC: %5u remote rpcbind version unavailable, retrying\n",
1187 task->tk_status = 0;
1188 task->tk_action = call_bind;
1190 case -ECONNREFUSED: /* connection problems */
1197 dprintk("RPC: %5u remote rpcbind unreachable: %d\n",
1198 task->tk_pid, task->tk_status);
1199 if (!RPC_IS_SOFTCONN(task)) {
1200 rpc_delay(task, 5*HZ);
1203 status = task->tk_status;
1206 dprintk("RPC: %5u unrecognized rpcbind error (%d)\n",
1207 task->tk_pid, -task->tk_status);
1210 rpc_exit(task, status);
1214 task->tk_action = call_timeout;
1218 * 4b. Connect to the RPC server
1221 call_connect(struct rpc_task *task)
1223 struct rpc_xprt *xprt = task->tk_xprt;
1225 dprintk("RPC: %5u call_connect xprt %p %s connected\n",
1227 (xprt_connected(xprt) ? "is" : "is not"));
1229 task->tk_action = call_transmit;
1230 if (!xprt_connected(xprt)) {
1231 task->tk_action = call_connect_status;
1232 if (task->tk_status < 0)
1239 * 4c. Sort out connect result
1242 call_connect_status(struct rpc_task *task)
1244 struct rpc_clnt *clnt = task->tk_client;
1245 int status = task->tk_status;
1247 dprint_status(task);
1249 task->tk_status = 0;
1250 if (status >= 0 || status == -EAGAIN) {
1251 clnt->cl_stats->netreconn++;
1252 task->tk_action = call_transmit;
1257 /* if soft mounted, test if we've timed out */
1259 task->tk_action = call_timeout;
1262 rpc_exit(task, -EIO);
1267 * 5. Transmit the RPC request, and wait for reply
1270 call_transmit(struct rpc_task *task)
1272 dprint_status(task);
1274 task->tk_action = call_status;
1275 if (task->tk_status < 0)
1277 task->tk_status = xprt_prepare_transmit(task);
1278 if (task->tk_status != 0)
1280 task->tk_action = call_transmit_status;
1281 /* Encode here so that rpcsec_gss can use correct sequence number. */
1282 if (rpc_task_need_encode(task)) {
1283 BUG_ON(task->tk_rqstp->rq_bytes_sent != 0);
1284 rpc_xdr_encode(task);
1285 /* Did the encode result in an error condition? */
1286 if (task->tk_status != 0) {
1287 /* Was the error nonfatal? */
1288 if (task->tk_status == -EAGAIN)
1289 rpc_delay(task, HZ >> 4);
1291 rpc_exit(task, task->tk_status);
1295 xprt_transmit(task);
1296 if (task->tk_status < 0)
1299 * On success, ensure that we call xprt_end_transmit() before sleeping
1300 * in order to allow access to the socket to other RPC requests.
1302 call_transmit_status(task);
1303 if (rpc_reply_expected(task))
1305 task->tk_action = rpc_exit_task;
1306 rpc_wake_up_queued_task(&task->tk_xprt->pending, task);
1310 * 5a. Handle cleanup after a transmission
1313 call_transmit_status(struct rpc_task *task)
1315 task->tk_action = call_status;
1318 * Common case: success. Force the compiler to put this
1321 if (task->tk_status == 0) {
1322 xprt_end_transmit(task);
1323 rpc_task_force_reencode(task);
1327 switch (task->tk_status) {
1331 dprint_status(task);
1332 xprt_end_transmit(task);
1333 rpc_task_force_reencode(task);
1336 * Special cases: if we've been waiting on the
1337 * socket's write_space() callback, or if the
1338 * socket just returned a connection error,
1339 * then hold onto the transport lock.
1345 if (RPC_IS_SOFTCONN(task)) {
1346 xprt_end_transmit(task);
1347 rpc_exit(task, task->tk_status);
1353 rpc_task_force_reencode(task);
1357 #if defined(CONFIG_NFS_V4_1)
1359 * 5b. Send the backchannel RPC reply. On error, drop the reply. In
1360 * addition, disconnect on connectivity errors.
1363 call_bc_transmit(struct rpc_task *task)
1365 struct rpc_rqst *req = task->tk_rqstp;
1367 BUG_ON(task->tk_status != 0);
1368 task->tk_status = xprt_prepare_transmit(task);
1369 if (task->tk_status == -EAGAIN) {
1371 * Could not reserve the transport. Try again after the
1372 * transport is released.
1374 task->tk_status = 0;
1375 task->tk_action = call_bc_transmit;
1379 task->tk_action = rpc_exit_task;
1380 if (task->tk_status < 0) {
1381 printk(KERN_NOTICE "RPC: Could not send backchannel reply "
1382 "error: %d\n", task->tk_status);
1386 xprt_transmit(task);
1387 xprt_end_transmit(task);
1388 dprint_status(task);
1389 switch (task->tk_status) {
1398 * Problem reaching the server. Disconnect and let the
1399 * forechannel reestablish the connection. The server will
1400 * have to retransmit the backchannel request and we'll
1401 * reprocess it. Since these ops are idempotent, there's no
1402 * need to cache our reply at this time.
1404 printk(KERN_NOTICE "RPC: Could not send backchannel reply "
1405 "error: %d\n", task->tk_status);
1406 xprt_conditional_disconnect(task->tk_xprt,
1407 req->rq_connect_cookie);
1411 * We were unable to reply and will have to drop the
1412 * request. The server should reconnect and retransmit.
1414 BUG_ON(task->tk_status == -EAGAIN);
1415 printk(KERN_NOTICE "RPC: Could not send backchannel reply "
1416 "error: %d\n", task->tk_status);
1419 rpc_wake_up_queued_task(&req->rq_xprt->pending, task);
1421 #endif /* CONFIG_NFS_V4_1 */
1424 * 6. Sort out the RPC call status
1427 call_status(struct rpc_task *task)
1429 struct rpc_clnt *clnt = task->tk_client;
1430 struct rpc_rqst *req = task->tk_rqstp;
1433 if (req->rq_reply_bytes_recvd > 0 && !req->rq_bytes_sent)
1434 task->tk_status = req->rq_reply_bytes_recvd;
1436 dprint_status(task);
1438 status = task->tk_status;
1440 task->tk_action = call_decode;
1444 task->tk_status = 0;
1450 * Delay any retries for 3 seconds, then handle as if it
1453 rpc_delay(task, 3*HZ);
1455 task->tk_action = call_timeout;
1456 if (task->tk_client->cl_discrtry)
1457 xprt_conditional_disconnect(task->tk_xprt,
1458 req->rq_connect_cookie);
1462 rpc_force_rebind(clnt);
1463 rpc_delay(task, 3*HZ);
1466 task->tk_action = call_bind;
1469 task->tk_action = call_transmit;
1472 /* shutdown or soft timeout */
1473 rpc_exit(task, status);
1476 if (clnt->cl_chatty)
1477 printk("%s: RPC call returned error %d\n",
1478 clnt->cl_protname, -status);
1479 rpc_exit(task, status);
1484 * 6a. Handle RPC timeout
1485 * We do not release the request slot, so we keep using the
1486 * same XID for all retransmits.
1489 call_timeout(struct rpc_task *task)
1491 struct rpc_clnt *clnt = task->tk_client;
1493 if (xprt_adjust_timeout(task->tk_rqstp) == 0) {
1494 dprintk("RPC: %5u call_timeout (minor)\n", task->tk_pid);
1498 dprintk("RPC: %5u call_timeout (major)\n", task->tk_pid);
1499 task->tk_timeouts++;
1501 if (RPC_IS_SOFTCONN(task)) {
1502 rpc_exit(task, -ETIMEDOUT);
1505 if (RPC_IS_SOFT(task)) {
1506 if (clnt->cl_chatty)
1507 printk(KERN_NOTICE "%s: server %s not responding, timed out\n",
1508 clnt->cl_protname, clnt->cl_server);
1509 rpc_exit(task, -EIO);
1513 if (!(task->tk_flags & RPC_CALL_MAJORSEEN)) {
1514 task->tk_flags |= RPC_CALL_MAJORSEEN;
1515 if (clnt->cl_chatty)
1516 printk(KERN_NOTICE "%s: server %s not responding, still trying\n",
1517 clnt->cl_protname, clnt->cl_server);
1519 rpc_force_rebind(clnt);
1521 * Did our request time out due to an RPCSEC_GSS out-of-sequence
1522 * event? RFC2203 requires the server to drop all such requests.
1524 rpcauth_invalcred(task);
1527 clnt->cl_stats->rpcretrans++;
1528 task->tk_action = call_bind;
1529 task->tk_status = 0;
1533 * 7. Decode the RPC reply
1536 call_decode(struct rpc_task *task)
1538 struct rpc_clnt *clnt = task->tk_client;
1539 struct rpc_rqst *req = task->tk_rqstp;
1540 kxdrdproc_t decode = task->tk_msg.rpc_proc->p_decode;
1543 dprintk("RPC: %5u call_decode (status %d)\n",
1544 task->tk_pid, task->tk_status);
1546 if (task->tk_flags & RPC_CALL_MAJORSEEN) {
1547 if (clnt->cl_chatty)
1548 printk(KERN_NOTICE "%s: server %s OK\n",
1549 clnt->cl_protname, clnt->cl_server);
1550 task->tk_flags &= ~RPC_CALL_MAJORSEEN;
1554 * Ensure that we see all writes made by xprt_complete_rqst()
1555 * before it changed req->rq_reply_bytes_recvd.
1558 req->rq_rcv_buf.len = req->rq_private_buf.len;
1560 /* Check that the softirq receive buffer is valid */
1561 WARN_ON(memcmp(&req->rq_rcv_buf, &req->rq_private_buf,
1562 sizeof(req->rq_rcv_buf)) != 0);
1564 if (req->rq_rcv_buf.len < 12) {
1565 if (!RPC_IS_SOFT(task)) {
1566 task->tk_action = call_bind;
1567 clnt->cl_stats->rpcretrans++;
1570 dprintk("RPC: %s: too small RPC reply size (%d bytes)\n",
1571 clnt->cl_protname, task->tk_status);
1572 task->tk_action = call_timeout;
1576 p = rpc_verify_header(task);
1578 if (p == ERR_PTR(-EAGAIN))
1583 task->tk_action = rpc_exit_task;
1586 task->tk_status = rpcauth_unwrap_resp(task, decode, req, p,
1587 task->tk_msg.rpc_resp);
1589 dprintk("RPC: %5u call_decode result %d\n", task->tk_pid,
1593 task->tk_status = 0;
1594 /* Note: rpc_verify_header() may have freed the RPC slot */
1595 if (task->tk_rqstp == req) {
1596 req->rq_reply_bytes_recvd = req->rq_rcv_buf.len = 0;
1597 if (task->tk_client->cl_discrtry)
1598 xprt_conditional_disconnect(task->tk_xprt,
1599 req->rq_connect_cookie);
1604 rpc_encode_header(struct rpc_task *task)
1606 struct rpc_clnt *clnt = task->tk_client;
1607 struct rpc_rqst *req = task->tk_rqstp;
1608 __be32 *p = req->rq_svec[0].iov_base;
1610 /* FIXME: check buffer size? */
1612 p = xprt_skip_transport_header(task->tk_xprt, p);
1613 *p++ = req->rq_xid; /* XID */
1614 *p++ = htonl(RPC_CALL); /* CALL */
1615 *p++ = htonl(RPC_VERSION); /* RPC version */
1616 *p++ = htonl(clnt->cl_prog); /* program number */
1617 *p++ = htonl(clnt->cl_vers); /* program version */
1618 *p++ = htonl(task->tk_msg.rpc_proc->p_proc); /* procedure */
1619 p = rpcauth_marshcred(task, p);
1620 req->rq_slen = xdr_adjust_iovec(&req->rq_svec[0], p);
1625 rpc_verify_header(struct rpc_task *task)
1627 struct kvec *iov = &task->tk_rqstp->rq_rcv_buf.head[0];
1628 int len = task->tk_rqstp->rq_rcv_buf.len >> 2;
1629 __be32 *p = iov->iov_base;
1631 int error = -EACCES;
1633 if ((task->tk_rqstp->rq_rcv_buf.len & 3) != 0) {
1634 /* RFC-1014 says that the representation of XDR data must be a
1635 * multiple of four bytes
1636 * - if it isn't pointer subtraction in the NFS client may give
1639 dprintk("RPC: %5u %s: XDR representation not a multiple of"
1640 " 4 bytes: 0x%x\n", task->tk_pid, __func__,
1641 task->tk_rqstp->rq_rcv_buf.len);
1647 p += 1; /* skip XID */
1648 if ((n = ntohl(*p++)) != RPC_REPLY) {
1649 dprintk("RPC: %5u %s: not an RPC reply: %x\n",
1650 task->tk_pid, __func__, n);
1654 if ((n = ntohl(*p++)) != RPC_MSG_ACCEPTED) {
1657 switch ((n = ntohl(*p++))) {
1658 case RPC_AUTH_ERROR:
1661 dprintk("RPC: %5u %s: RPC call version "
1663 task->tk_pid, __func__);
1664 error = -EPROTONOSUPPORT;
1667 dprintk("RPC: %5u %s: RPC call rejected, "
1668 "unknown error: %x\n",
1669 task->tk_pid, __func__, n);
1674 switch ((n = ntohl(*p++))) {
1675 case RPC_AUTH_REJECTEDCRED:
1676 case RPC_AUTH_REJECTEDVERF:
1677 case RPCSEC_GSS_CREDPROBLEM:
1678 case RPCSEC_GSS_CTXPROBLEM:
1679 if (!task->tk_cred_retry)
1681 task->tk_cred_retry--;
1682 dprintk("RPC: %5u %s: retry stale creds\n",
1683 task->tk_pid, __func__);
1684 rpcauth_invalcred(task);
1685 /* Ensure we obtain a new XID! */
1687 task->tk_action = call_reserve;
1689 case RPC_AUTH_BADCRED:
1690 case RPC_AUTH_BADVERF:
1691 /* possibly garbled cred/verf? */
1692 if (!task->tk_garb_retry)
1694 task->tk_garb_retry--;
1695 dprintk("RPC: %5u %s: retry garbled creds\n",
1696 task->tk_pid, __func__);
1697 task->tk_action = call_bind;
1699 case RPC_AUTH_TOOWEAK:
1700 printk(KERN_NOTICE "RPC: server %s requires stronger "
1701 "authentication.\n", task->tk_client->cl_server);
1704 dprintk("RPC: %5u %s: unknown auth error: %x\n",
1705 task->tk_pid, __func__, n);
1708 dprintk("RPC: %5u %s: call rejected %d\n",
1709 task->tk_pid, __func__, n);
1712 if (!(p = rpcauth_checkverf(task, p))) {
1713 dprintk("RPC: %5u %s: auth check failed\n",
1714 task->tk_pid, __func__);
1715 goto out_garbage; /* bad verifier, retry */
1717 len = p - (__be32 *)iov->iov_base - 1;
1720 switch ((n = ntohl(*p++))) {
1723 case RPC_PROG_UNAVAIL:
1724 dprintk("RPC: %5u %s: program %u is unsupported by server %s\n",
1725 task->tk_pid, __func__,
1726 (unsigned int)task->tk_client->cl_prog,
1727 task->tk_client->cl_server);
1728 error = -EPFNOSUPPORT;
1730 case RPC_PROG_MISMATCH:
1731 dprintk("RPC: %5u %s: program %u, version %u unsupported by "
1732 "server %s\n", task->tk_pid, __func__,
1733 (unsigned int)task->tk_client->cl_prog,
1734 (unsigned int)task->tk_client->cl_vers,
1735 task->tk_client->cl_server);
1736 error = -EPROTONOSUPPORT;
1738 case RPC_PROC_UNAVAIL:
1739 dprintk("RPC: %5u %s: proc %s unsupported by program %u, "
1740 "version %u on server %s\n",
1741 task->tk_pid, __func__,
1742 rpc_proc_name(task),
1743 task->tk_client->cl_prog,
1744 task->tk_client->cl_vers,
1745 task->tk_client->cl_server);
1746 error = -EOPNOTSUPP;
1748 case RPC_GARBAGE_ARGS:
1749 dprintk("RPC: %5u %s: server saw garbage\n",
1750 task->tk_pid, __func__);
1753 dprintk("RPC: %5u %s: server accept status: %x\n",
1754 task->tk_pid, __func__, n);
1759 task->tk_client->cl_stats->rpcgarbage++;
1760 if (task->tk_garb_retry) {
1761 task->tk_garb_retry--;
1762 dprintk("RPC: %5u %s: retrying\n",
1763 task->tk_pid, __func__);
1764 task->tk_action = call_bind;
1766 return ERR_PTR(-EAGAIN);
1771 rpc_exit(task, error);
1772 dprintk("RPC: %5u %s: call failed with error %d\n", task->tk_pid,
1774 return ERR_PTR(error);
1776 dprintk("RPC: %5u %s: server reply was truncated.\n", task->tk_pid,
1781 static void rpcproc_encode_null(void *rqstp, struct xdr_stream *xdr, void *obj)
1785 static int rpcproc_decode_null(void *rqstp, struct xdr_stream *xdr, void *obj)
1790 static struct rpc_procinfo rpcproc_null = {
1791 .p_encode = rpcproc_encode_null,
1792 .p_decode = rpcproc_decode_null,
1795 static int rpc_ping(struct rpc_clnt *clnt)
1797 struct rpc_message msg = {
1798 .rpc_proc = &rpcproc_null,
1801 msg.rpc_cred = authnull_ops.lookup_cred(NULL, NULL, 0);
1802 err = rpc_call_sync(clnt, &msg, RPC_TASK_SOFT | RPC_TASK_SOFTCONN);
1803 put_rpccred(msg.rpc_cred);
1807 struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred, int flags)
1809 struct rpc_message msg = {
1810 .rpc_proc = &rpcproc_null,
1813 struct rpc_task_setup task_setup_data = {
1815 .rpc_message = &msg,
1816 .callback_ops = &rpc_default_ops,
1819 return rpc_run_task(&task_setup_data);
1821 EXPORT_SYMBOL_GPL(rpc_call_null);
1824 static void rpc_show_header(void)
1826 printk(KERN_INFO "-pid- flgs status -client- --rqstp- "
1827 "-timeout ---ops--\n");
1830 static void rpc_show_task(const struct rpc_clnt *clnt,
1831 const struct rpc_task *task)
1833 const char *rpc_waitq = "none";
1835 if (RPC_IS_QUEUED(task))
1836 rpc_waitq = rpc_qname(task->tk_waitqueue);
1838 printk(KERN_INFO "%5u %04x %6d %8p %8p %8ld %8p %sv%u %s a:%ps q:%s\n",
1839 task->tk_pid, task->tk_flags, task->tk_status,
1840 clnt, task->tk_rqstp, task->tk_timeout, task->tk_ops,
1841 clnt->cl_protname, clnt->cl_vers, rpc_proc_name(task),
1842 task->tk_action, rpc_waitq);
1845 void rpc_show_tasks(void)
1847 struct rpc_clnt *clnt;
1848 struct rpc_task *task;
1851 spin_lock(&rpc_client_lock);
1852 list_for_each_entry(clnt, &all_clients, cl_clients) {
1853 spin_lock(&clnt->cl_lock);
1854 list_for_each_entry(task, &clnt->cl_tasks, tk_task) {
1859 rpc_show_task(clnt, task);
1861 spin_unlock(&clnt->cl_lock);
1863 spin_unlock(&rpc_client_lock);