Lines Matching +full:rpc +full:- +full:if
1 // SPDX-License-Identifier: GPL-2.0-only
5 * This file contains the high-level RPC interface.
9 * - RPC header generation and argument serialization.
10 * - Credential refresh.
11 * - TCP connect handling.
12 * - Retry of operation when it is suspected the operation failed because
47 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
82 spin_lock(&sn->rpc_client_lock); in rpc_register_client()
83 list_add(&clnt->cl_clients, &sn->all_clients); in rpc_register_client()
84 spin_unlock(&sn->rpc_client_lock); in rpc_register_client()
92 spin_lock(&sn->rpc_client_lock); in rpc_unregister_client()
93 list_del(&clnt->cl_clients); in rpc_unregister_client()
94 spin_unlock(&sn->rpc_client_lock); in rpc_unregister_client()
108 if (pipefs_sb) { in rpc_clnt_remove_pipedir()
109 if (pipefs_sb == clnt->pipefs_sb) in rpc_clnt_remove_pipedir()
119 const char *dir_name = clnt->cl_program->pipe_dir_name; in rpc_setup_pipedir_sb()
124 if (dir == NULL) { in rpc_setup_pipedir_sb()
125 pr_info("RPC: pipefs directory doesn't exist: %s\n", dir_name); in rpc_setup_pipedir_sb()
130 name[sizeof(name) - 1] = '\0'; in rpc_setup_pipedir_sb()
132 if (!IS_ERR(dentry)) in rpc_setup_pipedir_sb()
134 if (dentry == ERR_PTR(-EEXIST)) in rpc_setup_pipedir_sb()
136 printk(KERN_INFO "RPC: Couldn't create pipefs entry" in rpc_setup_pipedir_sb()
150 clnt->pipefs_sb = pipefs_sb; in rpc_setup_pipedir()
152 if (clnt->cl_program->pipe_dir_name != NULL) { in rpc_setup_pipedir()
154 if (IS_ERR(dentry)) in rpc_setup_pipedir()
162 if (clnt->cl_program->pipe_dir_name == NULL) in rpc_clnt_skip_event()
167 if (clnt->cl_pipedir_objects.pdh_dentry != NULL) in rpc_clnt_skip_event()
169 if (refcount_read(&clnt->cl_count) == 0) in rpc_clnt_skip_event()
173 if (clnt->cl_pipedir_objects.pdh_dentry == NULL) in rpc_clnt_skip_event()
188 if (!dentry) in __rpc_clnt_handle_event()
189 return -ENOENT; in __rpc_clnt_handle_event()
190 if (IS_ERR(dentry)) in __rpc_clnt_handle_event()
198 return -ENOTSUPP; in __rpc_clnt_handle_event()
208 for (;; clnt = clnt->cl_parent) { in __rpc_pipefs_event()
209 if (!rpc_clnt_skip_event(clnt, event)) in __rpc_pipefs_event()
211 if (error || clnt == clnt->cl_parent) in __rpc_pipefs_event()
222 spin_lock(&sn->rpc_client_lock); in rpc_get_client_for_event()
223 list_for_each_entry(clnt, &sn->all_clients, cl_clients) { in rpc_get_client_for_event()
224 if (rpc_clnt_skip_event(clnt, event)) in rpc_get_client_for_event()
226 spin_unlock(&sn->rpc_client_lock); in rpc_get_client_for_event()
229 spin_unlock(&sn->rpc_client_lock); in rpc_get_client_for_event()
240 while ((clnt = rpc_get_client_for_event(sb->s_fs_info, event))) { in rpc_pipefs_event()
242 if (error) in rpc_pipefs_event()
269 spin_lock(&clnt->cl_lock); in rpc_clnt_set_transport()
270 old = rcu_dereference_protected(clnt->cl_xprt, in rpc_clnt_set_transport()
271 lockdep_is_held(&clnt->cl_lock)); in rpc_clnt_set_transport()
273 clnt->cl_timeout = timeout; in rpc_clnt_set_transport()
274 rcu_assign_pointer(clnt->cl_xprt, xprt); in rpc_clnt_set_transport()
275 spin_unlock(&clnt->cl_lock); in rpc_clnt_set_transport()
284 copied = strscpy(clnt->cl_nodename, in rpc_clnt_set_nodename()
285 nodename, sizeof(clnt->cl_nodename)); in rpc_clnt_set_nodename()
287 clnt->cl_nodelen = copied < 0 in rpc_clnt_set_nodename()
288 ? sizeof(clnt->cl_nodename) - 1 in rpc_clnt_set_nodename()
308 if (pipefs_sb) { in rpc_client_register()
310 if (err) in rpc_client_register()
315 if (pipefs_sb) in rpc_client_register()
319 if (IS_ERR(auth)) { in rpc_client_register()
320 dprintk("RPC: Couldn't create auth handle (flavor %u)\n", in rpc_client_register()
331 if (pipefs_sb) in rpc_client_register()
350 if (clid < 0) in rpc_alloc_clid()
352 clnt->cl_clid = clid; in rpc_alloc_clid()
358 ida_free(&rpc_clids, clnt->cl_clid); in rpc_free_clid()
366 const struct rpc_program *program = args->program; in rpc_new_client()
370 const char *nodename = args->nodename; in rpc_new_client()
374 if (err) in rpc_new_client()
377 err = -EINVAL; in rpc_new_client()
378 if (args->version >= program->nrvers) in rpc_new_client()
380 version = program->version[args->version]; in rpc_new_client()
381 if (version == NULL) in rpc_new_client()
384 err = -ENOMEM; in rpc_new_client()
386 if (!clnt) in rpc_new_client()
388 clnt->cl_parent = parent ? : clnt; in rpc_new_client()
389 clnt->cl_xprtsec = args->xprtsec; in rpc_new_client()
392 if (err) in rpc_new_client()
395 clnt->cl_cred = get_cred(args->cred); in rpc_new_client()
396 clnt->cl_procinfo = version->procs; in rpc_new_client()
397 clnt->cl_maxproc = version->nrprocs; in rpc_new_client()
398 clnt->cl_prog = args->prognumber ? : program->number; in rpc_new_client()
399 clnt->cl_vers = version->number; in rpc_new_client()
400 clnt->cl_stats = args->stats ? : program->stats; in rpc_new_client()
401 clnt->cl_metrics = rpc_alloc_iostats(clnt); in rpc_new_client()
402 rpc_init_pipe_dir_head(&clnt->cl_pipedir_objects); in rpc_new_client()
403 err = -ENOMEM; in rpc_new_client()
404 if (clnt->cl_metrics == NULL) in rpc_new_client()
406 clnt->cl_program = program; in rpc_new_client()
407 INIT_LIST_HEAD(&clnt->cl_tasks); in rpc_new_client()
408 spin_lock_init(&clnt->cl_lock); in rpc_new_client()
410 timeout = xprt->timeout; in rpc_new_client()
411 if (args->timeout != NULL) { in rpc_new_client()
412 memcpy(&clnt->cl_timeout_default, args->timeout, in rpc_new_client()
413 sizeof(clnt->cl_timeout_default)); in rpc_new_client()
414 timeout = &clnt->cl_timeout_default; in rpc_new_client()
418 xprt->main = true; in rpc_new_client()
419 xprt_iter_init(&clnt->cl_xpi, xps); in rpc_new_client()
422 clnt->cl_rtt = &clnt->cl_rtt_default; in rpc_new_client()
423 rpc_init_rtt(&clnt->cl_rtt_default, clnt->cl_timeout->to_initval); in rpc_new_client()
425 refcount_set(&clnt->cl_count, 1); in rpc_new_client()
427 if (nodename == NULL) in rpc_new_client()
428 nodename = utsname()->nodename; in rpc_new_client()
433 err = rpc_client_register(clnt, args->authflavor, args->client_name); in rpc_new_client()
434 if (err) in rpc_new_client()
436 if (parent) in rpc_new_client()
437 refcount_inc(&parent->cl_count); in rpc_new_client()
443 rpc_free_iostats(clnt->cl_metrics); in rpc_new_client()
445 put_cred(clnt->cl_cred); in rpc_new_client()
454 trace_rpc_clnt_new_err(program->name, args->servername, err); in rpc_new_client()
464 if (args->bc_xprt && args->bc_xprt->xpt_bc_xps) { in rpc_create_xprt()
465 WARN_ON_ONCE(!(args->protocol & XPRT_TRANSPORT_BC)); in rpc_create_xprt()
466 xps = args->bc_xprt->xpt_bc_xps; in rpc_create_xprt()
470 if (xps == NULL) { in rpc_create_xprt()
472 return ERR_PTR(-ENOMEM); in rpc_create_xprt()
474 if (xprt->bc_xprt) { in rpc_create_xprt()
476 xprt->bc_xprt->xpt_bc_xps = xps; in rpc_create_xprt()
480 if (IS_ERR(clnt)) in rpc_create_xprt()
483 if (!(args->flags & RPC_CLNT_CREATE_NOPING)) { in rpc_create_xprt()
485 if (err != 0) { in rpc_create_xprt()
489 } else if (args->flags & RPC_CLNT_CREATE_CONNECTED) { in rpc_create_xprt()
491 if (err != 0) { in rpc_create_xprt()
497 clnt->cl_softrtry = 1; in rpc_create_xprt()
498 if (args->flags & (RPC_CLNT_CREATE_HARDRTRY|RPC_CLNT_CREATE_SOFTERR)) { in rpc_create_xprt()
499 clnt->cl_softrtry = 0; in rpc_create_xprt()
500 if (args->flags & RPC_CLNT_CREATE_SOFTERR) in rpc_create_xprt()
501 clnt->cl_softerr = 1; in rpc_create_xprt()
504 if (args->flags & RPC_CLNT_CREATE_AUTOBIND) in rpc_create_xprt()
505 clnt->cl_autobind = 1; in rpc_create_xprt()
506 if (args->flags & RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT) in rpc_create_xprt()
507 clnt->cl_noretranstimeo = 1; in rpc_create_xprt()
508 if (args->flags & RPC_CLNT_CREATE_DISCRTRY) in rpc_create_xprt()
509 clnt->cl_discrtry = 1; in rpc_create_xprt()
510 if (!(args->flags & RPC_CLNT_CREATE_QUIET)) in rpc_create_xprt()
511 clnt->cl_chatty = 1; in rpc_create_xprt()
512 if (args->flags & RPC_CLNT_CREATE_NETUNREACH_FATAL) in rpc_create_xprt()
513 clnt->cl_netunreach_fatal = 1; in rpc_create_xprt()
519 * rpc_create - create an RPC client and transport with one call
522 * Creates and initializes an RPC transport and an RPC client.
524 * It can ping the server in order to determine if it is up, and to see if
532 .net = args->net, in rpc_create()
533 .ident = args->protocol, in rpc_create()
534 .srcaddr = args->saddress, in rpc_create()
535 .dstaddr = args->address, in rpc_create()
536 .addrlen = args->addrsize, in rpc_create()
537 .servername = args->servername, in rpc_create()
538 .bc_xprt = args->bc_xprt, in rpc_create()
539 .xprtsec = args->xprtsec, in rpc_create()
540 .connect_timeout = args->connect_timeout, in rpc_create()
541 .reconnect_timeout = args->reconnect_timeout, in rpc_create()
547 if (args->bc_xprt) { in rpc_create()
548 WARN_ON_ONCE(!(args->protocol & XPRT_TRANSPORT_BC)); in rpc_create()
549 xprt = args->bc_xprt->xpt_bc_xprt; in rpc_create()
550 if (xprt) { in rpc_create()
556 if (args->flags & RPC_CLNT_CREATE_INFINITE_SLOTS) in rpc_create()
558 if (args->flags & RPC_CLNT_CREATE_NO_IDLE_TIMEOUT) in rpc_create()
561 * If the caller chooses not to specify a hostname, whip in rpc_create()
562 * up a string representation of the passed-in address. in rpc_create()
564 if (xprtargs.servername == NULL) { in rpc_create()
566 (struct sockaddr_un *)args->address; in rpc_create()
568 (struct sockaddr_in *)args->address; in rpc_create()
570 (struct sockaddr_in6 *)args->address; in rpc_create()
573 switch (args->address->sa_family) { in rpc_create()
575 if (sun->sun_path[0]) in rpc_create()
577 sun->sun_path); in rpc_create()
580 sun->sun_path+1); in rpc_create()
584 &sin->sin_addr.s_addr); in rpc_create()
588 &sin6->sin6_addr); in rpc_create()
593 return ERR_PTR(-EINVAL); in rpc_create()
599 if (IS_ERR(xprt)) in rpc_create()
603 * By default, kernel RPC client connects from a reserved port. in rpc_create()
608 xprt->resvport = 1; in rpc_create()
609 if (args->flags & RPC_CLNT_CREATE_NONPRIVPORT) in rpc_create()
610 xprt->resvport = 0; in rpc_create()
611 xprt->reuseport = 0; in rpc_create()
612 if (args->flags & RPC_CLNT_CREATE_REUSEPORT) in rpc_create()
613 xprt->reuseport = 1; in rpc_create()
616 if (IS_ERR(clnt) || args->nconnect <= 1) in rpc_create()
619 for (i = 0; i < args->nconnect - 1; i++) { in rpc_create()
620 if (rpc_clnt_add_xprt(clnt, &xprtargs, NULL, NULL) < 0) in rpc_create()
628 * This function clones the RPC client structure. It allows us to share the
640 err = -ENOMEM; in __rpc_clone_client()
642 xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); in __rpc_clone_client()
643 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in __rpc_clone_client()
645 if (xprt == NULL || xps == NULL) { in __rpc_clone_client()
650 args->servername = xprt->servername; in __rpc_clone_client()
651 args->nodename = clnt->cl_nodename; in __rpc_clone_client()
654 if (IS_ERR(new)) in __rpc_clone_client()
658 new->cl_autobind = 0; in __rpc_clone_client()
659 new->cl_softrtry = clnt->cl_softrtry; in __rpc_clone_client()
660 new->cl_softerr = clnt->cl_softerr; in __rpc_clone_client()
661 new->cl_noretranstimeo = clnt->cl_noretranstimeo; in __rpc_clone_client()
662 new->cl_discrtry = clnt->cl_discrtry; in __rpc_clone_client()
663 new->cl_chatty = clnt->cl_chatty; in __rpc_clone_client()
664 new->cl_netunreach_fatal = clnt->cl_netunreach_fatal; in __rpc_clone_client()
665 new->cl_principal = clnt->cl_principal; in __rpc_clone_client()
666 new->cl_max_connect = clnt->cl_max_connect; in __rpc_clone_client()
675 * rpc_clone_client - Clone an RPC client structure
677 * @clnt: RPC client whose parameters are copied
679 * Returns a fresh RPC client or an ERR_PTR.
684 .program = clnt->cl_program, in rpc_clone_client()
685 .prognumber = clnt->cl_prog, in rpc_clone_client()
686 .version = clnt->cl_vers, in rpc_clone_client()
687 .authflavor = clnt->cl_auth->au_flavor, in rpc_clone_client()
688 .cred = clnt->cl_cred, in rpc_clone_client()
689 .stats = clnt->cl_stats, in rpc_clone_client()
696 * rpc_clone_client_set_auth - Clone an RPC client structure and set its auth
698 * @clnt: RPC client whose parameters are copied
701 * Returns a fresh RPC client or an ERR_PTR.
707 .program = clnt->cl_program, in rpc_clone_client_set_auth()
708 .prognumber = clnt->cl_prog, in rpc_clone_client_set_auth()
709 .version = clnt->cl_vers, in rpc_clone_client_set_auth()
711 .cred = clnt->cl_cred, in rpc_clone_client_set_auth()
712 .stats = clnt->cl_stats, in rpc_clone_client_set_auth()
719 * rpc_switch_client_transport: switch the RPC transport on the fly
724 * This function allows the caller to switch the RPC transport for the
727 * there are no active RPC tasks by using some form of locking.
729 * Returns zero if "clnt" is now using the new xprt. Otherwise a
744 args->xprtsec = clnt->cl_xprtsec; in rpc_switch_client_transport()
746 if (IS_ERR(xprt)) in rpc_switch_client_transport()
750 if (xps == NULL) { in rpc_switch_client_transport()
752 return -ENOMEM; in rpc_switch_client_transport()
755 pseudoflavor = clnt->cl_auth->au_flavor; in rpc_switch_client_transport()
757 old_timeo = clnt->cl_timeout; in rpc_switch_client_transport()
759 oldxps = xprt_iter_xchg_switch(&clnt->cl_xpi, xps); in rpc_switch_client_transport()
769 * children, if it has any, still point to the old xprt. in rpc_switch_client_transport()
771 parent = clnt->cl_parent; in rpc_switch_client_transport()
772 clnt->cl_parent = clnt; in rpc_switch_client_transport()
775 * The old rpc_auth cache cannot be re-used. GSS in rpc_switch_client_transport()
780 if (err) in rpc_switch_client_transport()
784 if (parent != clnt) in rpc_switch_client_transport()
792 xps = xprt_iter_xchg_switch(&clnt->cl_xpi, oldxps); in rpc_switch_client_transport()
794 clnt->cl_parent = parent; in rpc_switch_client_transport()
808 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in rpc_clnt_xprt_switch_get()
821 if (xps == NULL) in _rpc_clnt_xprt_iter_init()
822 return -EAGAIN; in _rpc_clnt_xprt_iter_init()
842 * rpc_clnt_iterate_for_each_xprt - Apply a function to all transports
847 * Iterates through the list of RPC transports currently attached to the
860 if (ret) in rpc_clnt_iterate_for_each_xprt()
865 if (!xprt) in rpc_clnt_iterate_for_each_xprt()
869 if (ret < 0) in rpc_clnt_iterate_for_each_xprt()
886 if (list_empty(&clnt->cl_tasks)) in rpc_killall_tasks()
893 spin_lock(&clnt->cl_lock); in rpc_killall_tasks()
894 list_for_each_entry(rovr, &clnt->cl_tasks, tk_task) in rpc_killall_tasks()
896 spin_unlock(&clnt->cl_lock); in rpc_killall_tasks()
901 * rpc_cancel_tasks - try to cancel a set of RPC tasks
902 * @clnt: Pointer to RPC client
903 * @error: RPC task error value to set
907 * Uses @fnmatch to define a set of RPC tasks that are to be cancelled.
918 if (list_empty(&clnt->cl_tasks)) in rpc_cancel_tasks()
923 spin_lock(&clnt->cl_lock); in rpc_cancel_tasks()
924 list_for_each_entry(task, &clnt->cl_tasks, tk_task) { in rpc_cancel_tasks()
925 if (!RPC_IS_ACTIVATED(task)) in rpc_cancel_tasks()
927 if (!fnmatch(task, data)) in rpc_cancel_tasks()
932 spin_unlock(&clnt->cl_lock); in rpc_cancel_tasks()
940 if (xprt_connected(xprt)) in rpc_clnt_disconnect_xprt()
952 * Properly shut down an RPC client, terminating all outstanding
961 clnt->cl_shutdown = 1; in rpc_shutdown_client()
962 while (!list_empty(&clnt->cl_tasks)) { in rpc_shutdown_client()
965 list_empty(&clnt->cl_tasks), 1*HZ); in rpc_shutdown_client()
970 atomic_read(&clnt->cl_task_count) == 0, 1 * HZ); in rpc_shutdown_client()
977 * Free an RPC client
993 xprt_put(rcu_dereference_raw(clnt->cl_xprt)); in rpc_free_client_work()
1004 if (clnt->cl_parent != clnt) in rpc_free_client()
1005 parent = clnt->cl_parent; in rpc_free_client()
1007 rpc_free_iostats(clnt->cl_metrics); in rpc_free_client()
1008 clnt->cl_metrics = NULL; in rpc_free_client()
1009 xprt_iter_destroy(&clnt->cl_xpi); in rpc_free_client()
1010 put_cred(clnt->cl_cred); in rpc_free_client()
1012 INIT_WORK(&clnt->cl_work, rpc_free_client_work); in rpc_free_client()
1013 schedule_work(&clnt->cl_work); in rpc_free_client()
1018 * Free an RPC client
1024 * Note: RPCSEC_GSS may need to send NULL RPC calls in order to in rpc_free_auth()
1028 if (clnt->cl_auth != NULL) { in rpc_free_auth()
1029 rpcauth_release(clnt->cl_auth); in rpc_free_auth()
1030 clnt->cl_auth = NULL; in rpc_free_auth()
1032 if (refcount_dec_and_test(&clnt->cl_count)) in rpc_free_auth()
1038 * Release reference to the RPC client
1044 if (list_empty(&clnt->cl_tasks)) in rpc_release_client()
1046 if (refcount_dec_not_one(&clnt->cl_count)) in rpc_release_client()
1054 * rpc_bind_new_program - bind a new RPC program to an existing client
1056 * @program: rpc program to set
1057 * @vers: rpc program version
1059 * Clones the rpc client and sets up a new RPC program. This is mainly
1060 * of use for enabling different RPC programs to share the same transport.
1069 .prognumber = program->number, in rpc_bind_new_program()
1071 .authflavor = old->cl_auth->au_flavor, in rpc_bind_new_program()
1072 .cred = old->cl_cred, in rpc_bind_new_program()
1073 .stats = old->cl_stats, in rpc_bind_new_program()
1074 .timeout = old->cl_timeout, in rpc_bind_new_program()
1080 if (IS_ERR(clnt)) in rpc_bind_new_program()
1083 if (err != 0) { in rpc_bind_new_program()
1097 if (!xprt) in rpc_task_get_xprt()
1100 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_task_get_xprt()
1101 atomic_long_inc(&xps->xps_queuelen); in rpc_task_get_xprt()
1103 atomic_long_inc(&xprt->queuelen); in rpc_task_get_xprt()
1113 atomic_long_dec(&xprt->queuelen); in rpc_task_release_xprt()
1115 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_task_release_xprt()
1116 atomic_long_dec(&xps->xps_queuelen); in rpc_task_release_xprt()
1124 struct rpc_xprt *xprt = task->tk_xprt; in rpc_task_release_transport()
1126 if (xprt) { in rpc_task_release_transport()
1127 task->tk_xprt = NULL; in rpc_task_release_transport()
1128 if (task->tk_client) in rpc_task_release_transport()
1129 rpc_task_release_xprt(task->tk_client, xprt); in rpc_task_release_transport()
1138 struct rpc_clnt *clnt = task->tk_client; in rpc_task_release_client()
1141 if (clnt != NULL) { in rpc_task_release_client()
1143 spin_lock(&clnt->cl_lock); in rpc_task_release_client()
1144 list_del(&task->tk_task); in rpc_task_release_client()
1145 spin_unlock(&clnt->cl_lock); in rpc_task_release_client()
1146 task->tk_client = NULL; in rpc_task_release_client()
1147 atomic_dec(&clnt->cl_task_count); in rpc_task_release_client()
1159 xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); in rpc_task_get_first_xprt()
1167 return rpc_task_get_xprt(clnt, xprt_iter_get_next(&clnt->cl_xpi)); in rpc_task_get_next_xprt()
1173 if (task->tk_xprt) { in rpc_task_set_transport()
1174 if (!(test_bit(XPRT_OFFLINE, &task->tk_xprt->state) && in rpc_task_set_transport()
1175 (task->tk_flags & RPC_TASK_MOVEABLE))) in rpc_task_set_transport()
1178 xprt_put(task->tk_xprt); in rpc_task_set_transport()
1180 if (task->tk_flags & RPC_TASK_NO_ROUND_ROBIN) in rpc_task_set_transport()
1181 task->tk_xprt = rpc_task_get_first_xprt(clnt); in rpc_task_set_transport()
1183 task->tk_xprt = rpc_task_get_next_xprt(clnt); in rpc_task_set_transport()
1190 task->tk_client = clnt; in rpc_task_set_client()
1191 refcount_inc(&clnt->cl_count); in rpc_task_set_client()
1192 if (clnt->cl_softrtry) in rpc_task_set_client()
1193 task->tk_flags |= RPC_TASK_SOFT; in rpc_task_set_client()
1194 if (clnt->cl_softerr) in rpc_task_set_client()
1195 task->tk_flags |= RPC_TASK_TIMEOUT; in rpc_task_set_client()
1196 if (clnt->cl_noretranstimeo) in rpc_task_set_client()
1197 task->tk_flags |= RPC_TASK_NO_RETRANS_TIMEOUT; in rpc_task_set_client()
1198 if (clnt->cl_netunreach_fatal) in rpc_task_set_client()
1199 task->tk_flags |= RPC_TASK_NETUNREACH_FATAL; in rpc_task_set_client()
1200 atomic_inc(&clnt->cl_task_count); in rpc_task_set_client()
1206 if (msg != NULL) { in rpc_task_set_rpc_message()
1207 task->tk_msg.rpc_proc = msg->rpc_proc; in rpc_task_set_rpc_message()
1208 task->tk_msg.rpc_argp = msg->rpc_argp; in rpc_task_set_rpc_message()
1209 task->tk_msg.rpc_resp = msg->rpc_resp; in rpc_task_set_rpc_message()
1210 task->tk_msg.rpc_cred = msg->rpc_cred; in rpc_task_set_rpc_message()
1211 if (!(task->tk_flags & RPC_TASK_CRED_NOREF)) in rpc_task_set_rpc_message()
1212 get_cred(task->tk_msg.rpc_cred); in rpc_task_set_rpc_message()
1217 * Default callback for async RPC calls
1229 * rpc_run_task - Allocate a new RPC task, then run rpc_execute against it
1237 if (IS_ERR(task)) in rpc_run_task()
1240 if (!RPC_IS_ASYNC(task)) in rpc_run_task()
1241 task->tk_flags |= RPC_TASK_CRED_NOREF; in rpc_run_task()
1243 rpc_task_set_client(task, task_setup_data->rpc_client); in rpc_run_task()
1244 rpc_task_set_rpc_message(task, task_setup_data->rpc_message); in rpc_run_task()
1246 if (task->tk_action == NULL) in rpc_run_task()
1249 atomic_inc(&task->tk_count); in rpc_run_task()
1256 * rpc_call_sync - Perform a synchronous RPC call
1257 * @clnt: pointer to RPC client
1258 * @msg: RPC call parameters
1259 * @flags: RPC call flags
1273 if (flags & RPC_TASK_ASYNC) { in rpc_call_sync()
1276 return -EINVAL; in rpc_call_sync()
1280 if (IS_ERR(task)) in rpc_call_sync()
1282 status = task->tk_status; in rpc_call_sync()
1289 * rpc_call_async - Perform an asynchronous RPC call
1290 * @clnt: pointer to RPC client
1291 * @msg: RPC call parameters
1292 * @flags: RPC call flags
1293 * @tk_ops: RPC call ops
1310 if (IS_ERR(task)) in rpc_call_async()
1317 #if defined(CONFIG_SUNRPC_BACKCHANNEL)
1321 * rpc_run_bc_task - Allocate a new RPC task for backchannel use, then run
1323 * @req: RPC request
1336 dprintk("RPC: rpc_run_bc_task req= %p\n", req); in rpc_run_bc_task()
1341 if (IS_ERR(task)) { in rpc_run_bc_task()
1348 task->tk_action = call_bc_encode; in rpc_run_bc_task()
1349 atomic_inc(&task->tk_count); in rpc_run_bc_task()
1350 WARN_ON_ONCE(atomic_read(&task->tk_count) != 2); in rpc_run_bc_task()
1353 dprintk("RPC: rpc_run_bc_task: task= %p\n", task); in rpc_run_bc_task()
1359 * rpc_prepare_reply_pages - Prepare to receive a reply data payload into pages
1360 * @req: RPC request to prepare
1371 hdrsize += RPC_REPHDRSIZE + req->rq_cred->cr_auth->au_ralign; in rpc_prepare_reply_pages()
1373 xdr_inline_pages(&req->rq_rcv_buf, hdrsize << 2, pages, base, len); in rpc_prepare_reply_pages()
1374 trace_rpc_xdr_reply_pages(req->rq_task, &req->rq_rcv_buf); in rpc_prepare_reply_pages()
1381 task->tk_action = call_start; in rpc_call_start()
1386 * rpc_peeraddr - extract remote peer address from clnt's xprt
1387 * @clnt: RPC client structure
1399 xprt = rcu_dereference(clnt->cl_xprt); in rpc_peeraddr()
1401 bytes = xprt->addrlen; in rpc_peeraddr()
1402 if (bytes > bufsize) in rpc_peeraddr()
1404 memcpy(buf, &xprt->addr, bytes); in rpc_peeraddr()
1412 * rpc_peeraddr2str - return remote peer address in printable format
1413 * @clnt: RPC client structure
1425 xprt = rcu_dereference(clnt->cl_xprt); in rpc_peeraddr2str()
1427 if (xprt->address_strings[format] != NULL) in rpc_peeraddr2str()
1428 return xprt->address_strings[format]; in rpc_peeraddr2str()
1449 * Returns zero and fills in "buf" if successful; otherwise, a
1458 err = __sock_create(net, sap->sa_family, in rpc_sockname()
1460 if (err < 0) { in rpc_sockname()
1461 dprintk("RPC: can't create UDP socket (%d)\n", err); in rpc_sockname()
1465 switch (sap->sa_family) { in rpc_sockname()
1477 err = -EAFNOSUPPORT; in rpc_sockname()
1480 if (err < 0) { in rpc_sockname()
1481 dprintk("RPC: can't bind UDP socket (%d)\n", err); in rpc_sockname()
1486 if (err < 0) { in rpc_sockname()
1487 dprintk("RPC: can't connect UDP socket (%d)\n", err); in rpc_sockname()
1492 if (err < 0) { in rpc_sockname()
1493 dprintk("RPC: getsockname failed (%d)\n", err); in rpc_sockname()
1498 if (buf->sa_family == AF_INET6) { in rpc_sockname()
1500 sin6->sin6_scope_id = 0; in rpc_sockname()
1502 dprintk("RPC: %s succeeded\n", __func__); in rpc_sockname()
1515 * Returns zero and fills in "buf" if successful; otherwise, a
1522 if (buflen < sizeof(rpc_inaddr_loopback)) in rpc_anyaddr()
1523 return -EINVAL; in rpc_anyaddr()
1528 if (buflen < sizeof(rpc_in6addr_loopback)) in rpc_anyaddr()
1529 return -EINVAL; in rpc_anyaddr()
1534 dprintk("RPC: %s: address family not supported\n", in rpc_anyaddr()
1536 return -EAFNOSUPPORT; in rpc_anyaddr()
1538 dprintk("RPC: %s: succeeded\n", __func__); in rpc_anyaddr()
1543 * rpc_localaddr - discover local endpoint address for an RPC client
1544 * @clnt: RPC client structure
1548 * Returns zero and fills in "buf" and "buflen" if successful;
1551 * This works even if the underlying transport is not currently connected,
1552 * or if the upper layer never previously provided a source address.
1568 xprt = rcu_dereference(clnt->cl_xprt); in rpc_localaddr()
1569 salen = xprt->addrlen; in rpc_localaddr()
1570 memcpy(sap, &xprt->addr, salen); in rpc_localaddr()
1571 net = get_net(xprt->xprt_net); in rpc_localaddr()
1577 if (err != 0) in rpc_localaddr()
1579 return rpc_anyaddr(sap->sa_family, buf, buflen); in rpc_localaddr()
1590 xprt = rcu_dereference(clnt->cl_xprt); in rpc_setbufsize()
1591 if (xprt->ops->set_buffer_size) in rpc_setbufsize()
1592 xprt->ops->set_buffer_size(xprt, sndsize, rcvsize); in rpc_setbufsize()
1598 * rpc_net_ns - Get the network namespace for this RPC client
1599 * @clnt: RPC client to query
1607 ret = rcu_dereference(clnt->cl_xprt)->xprt_net; in rpc_net_ns()
1614 * rpc_max_payload - Get maximum payload size for a transport, in bytes
1615 * @clnt: RPC client to query
1617 * For stream transports, this is one RPC record fragment (see RFC
1618 * 1831), as we don't support multi-record requests yet. For datagram
1620 * RPC header sizes.
1627 ret = rcu_dereference(clnt->cl_xprt)->max_payload; in rpc_max_payload()
1634 * rpc_max_bc_payload - Get maximum backchannel payload size, in bytes
1635 * @clnt: RPC client to query
1643 xprt = rcu_dereference(clnt->cl_xprt); in rpc_max_bc_payload()
1644 ret = xprt->ops->bc_maxpayload(xprt); in rpc_max_bc_payload()
1656 xprt = rcu_dereference(clnt->cl_xprt); in rpc_num_bc_slots()
1657 ret = xprt->ops->bc_num_slots(xprt); in rpc_num_bc_slots()
1664 * rpc_force_rebind - force transport to check that remote port is unchanged
1670 if (clnt->cl_autobind) { in rpc_force_rebind()
1672 xprt_clear_bound(rcu_dereference(clnt->cl_xprt)); in rpc_force_rebind()
1681 task->tk_status = 0; in __rpc_restart_call()
1682 task->tk_rpc_status = 0; in __rpc_restart_call()
1683 task->tk_action = action; in __rpc_restart_call()
1688 * Restart an (async) RPC call. Usually called from within the
1699 * Restart an (async) RPC call from the call_prepare state.
1705 if (task->tk_ops->rpc_call_prepare != NULL) in rpc_restart_call_prepare()
1714 const struct rpc_procinfo *proc = task->tk_msg.rpc_proc; in rpc_proc_name()
1716 if (proc) { in rpc_proc_name()
1717 if (proc->p_name) in rpc_proc_name()
1718 return proc->p_name; in rpc_proc_name()
1743 * this state is visited exactly once for each RPC.
1748 struct rpc_clnt *clnt = task->tk_client; in call_start()
1749 int idx = task->tk_msg.rpc_proc->p_statidx; in call_start()
1753 if (task->tk_client->cl_shutdown) { in call_start()
1754 rpc_call_rpcerror(task, -EIO); in call_start()
1759 if (clnt->cl_program->version[clnt->cl_vers]) in call_start()
1760 clnt->cl_program->version[clnt->cl_vers]->counts[idx]++; in call_start()
1761 clnt->cl_stats->rpccnt++; in call_start()
1762 task->tk_action = call_reserve; in call_start()
1767 * 1. Reserve an RPC call slot
1772 task->tk_status = 0; in call_reserve()
1773 task->tk_action = call_reserveresult; in call_reserve()
1785 int status = task->tk_status; in call_reserveresult()
1791 task->tk_status = 0; in call_reserveresult()
1792 if (status >= 0) { in call_reserveresult()
1793 if (task->tk_rqstp) { in call_reserveresult()
1794 task->tk_action = call_refresh; in call_reserveresult()
1797 spin_lock(&task->tk_client->cl_lock); in call_reserveresult()
1798 if (list_empty(&task->tk_task)) in call_reserveresult()
1799 list_add_tail(&task->tk_task, &task->tk_client->cl_tasks); in call_reserveresult()
1800 spin_unlock(&task->tk_client->cl_lock); in call_reserveresult()
1803 rpc_call_rpcerror(task, -EIO); in call_reserveresult()
1808 case -ENOMEM: in call_reserveresult()
1811 case -EAGAIN: /* woken up; retry */ in call_reserveresult()
1812 task->tk_action = call_retry_reserve; in call_reserveresult()
1820 * 1c. Retry reserving an RPC call slot
1825 task->tk_status = 0; in call_retry_reserve()
1826 task->tk_action = call_reserveresult; in call_retry_reserve()
1836 task->tk_action = call_refreshresult; in call_refresh()
1837 task->tk_status = 0; in call_refresh()
1838 task->tk_client->cl_stats->rpcauthrefresh++; in call_refresh()
1848 int status = task->tk_status; in call_refreshresult()
1850 task->tk_status = 0; in call_refreshresult()
1851 task->tk_action = call_refresh; in call_refreshresult()
1854 if (rpcauth_uptodatecred(task)) { in call_refreshresult()
1855 task->tk_action = call_allocate; in call_refreshresult()
1858 /* Use rate-limiting and a max number of retries if refresh in call_refreshresult()
1862 case -ETIMEDOUT: in call_refreshresult()
1865 case -EAGAIN: in call_refreshresult()
1866 status = -EACCES; in call_refreshresult()
1867 if (!task->tk_cred_retry) in call_refreshresult()
1869 task->tk_cred_retry--; in call_refreshresult()
1872 case -EKEYEXPIRED: in call_refreshresult()
1874 case -ENOMEM: in call_refreshresult()
1889 const struct rpc_auth *auth = task->tk_rqstp->rq_cred->cr_auth; in call_allocate()
1890 struct rpc_rqst *req = task->tk_rqstp; in call_allocate()
1891 struct rpc_xprt *xprt = req->rq_xprt; in call_allocate()
1892 const struct rpc_procinfo *proc = task->tk_msg.rpc_proc; in call_allocate()
1895 task->tk_status = 0; in call_allocate()
1896 task->tk_action = call_encode; in call_allocate()
1898 if (req->rq_buffer) in call_allocate()
1902 * Calculate the size (in quads) of the RPC call in call_allocate()
1906 req->rq_callsize = RPC_CALLHDRSIZE + (auth->au_cslack << 1) + in call_allocate()
1907 proc->p_arglen; in call_allocate()
1908 req->rq_callsize <<= 2; in call_allocate()
1913 req->rq_rcvsize = RPC_REPHDRSIZE + auth->au_rslack + \ in call_allocate()
1914 max_t(size_t, proc->p_replen, 2); in call_allocate()
1915 req->rq_rcvsize <<= 2; in call_allocate()
1917 status = xprt->ops->buf_alloc(task); in call_allocate()
1919 if (status == 0) in call_allocate()
1921 if (status != -ENOMEM) { in call_allocate()
1926 if (RPC_IS_ASYNC(task) || !fatal_signal_pending(current)) { in call_allocate()
1927 task->tk_action = call_allocate; in call_allocate()
1932 rpc_call_rpcerror(task, -ERESTARTSYS); in call_allocate()
1938 return test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate) == 0 && in rpc_task_need_encode()
1939 (!(task->tk_flags & RPC_TASK_SENT) || in rpc_task_need_encode()
1940 !(task->tk_flags & RPC_TASK_NO_RETRANS_TIMEOUT) || in rpc_task_need_encode()
1947 struct rpc_rqst *req = task->tk_rqstp; in rpc_xdr_encode()
1950 xdr_buf_init(&req->rq_snd_buf, in rpc_xdr_encode()
1951 req->rq_buffer, in rpc_xdr_encode()
1952 req->rq_callsize); in rpc_xdr_encode()
1953 xdr_buf_init(&req->rq_rcv_buf, in rpc_xdr_encode()
1954 req->rq_rbuffer, in rpc_xdr_encode()
1955 req->rq_rcvsize); in rpc_xdr_encode()
1957 req->rq_reply_bytes_recvd = 0; in rpc_xdr_encode()
1958 req->rq_snd_buf.head[0].iov_len = 0; in rpc_xdr_encode()
1959 xdr_init_encode(&xdr, &req->rq_snd_buf, in rpc_xdr_encode()
1960 req->rq_snd_buf.head[0].iov_base, req); in rpc_xdr_encode()
1961 if (rpc_encode_header(task, &xdr)) in rpc_xdr_encode()
1964 task->tk_status = rpcauth_wrap_req(task, &xdr); in rpc_xdr_encode()
1968 * 3. Encode arguments of an RPC call
1973 if (!rpc_task_need_encode(task)) in call_encode()
1981 if (task->tk_status == 0 && rpc_reply_expected(task)) in call_encode()
1982 task->tk_status = xprt_request_enqueue_receive(task); in call_encode()
1984 if (task->tk_status != 0) { in call_encode()
1986 switch (task->tk_status) { in call_encode()
1987 case -EAGAIN: in call_encode()
1988 case -ENOMEM: in call_encode()
1991 case -EKEYEXPIRED: in call_encode()
1992 if (!task->tk_cred_retry) { in call_encode()
1993 rpc_call_rpcerror(task, task->tk_status); in call_encode()
1995 task->tk_action = call_refresh; in call_encode()
1996 task->tk_cred_retry--; in call_encode()
2001 rpc_call_rpcerror(task, task->tk_status); in call_encode()
2008 task->tk_action = call_transmit; in call_encode()
2010 if (!xprt_bound(task->tk_xprt)) in call_encode()
2011 task->tk_action = call_bind; in call_encode()
2012 else if (!xprt_connected(task->tk_xprt)) in call_encode()
2013 task->tk_action = call_connect; in call_encode()
2017 * Helpers to check if the task was already transmitted, and
2023 return !test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate); in rpc_task_transmitted()
2030 task->tk_action = call_transmit_status; in rpc_task_handle_transmitted()
2034 * 4. Get the server port number if not yet set
2039 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_bind()
2041 if (rpc_task_transmitted(task)) { in call_bind()
2046 if (xprt_bound(xprt)) { in call_bind()
2047 task->tk_action = call_connect; in call_bind()
2051 task->tk_action = call_bind_status; in call_bind()
2052 if (!xprt_prepare_transmit(task)) in call_bind()
2055 xprt->ops->rpcbind(task); in call_bind()
2064 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_bind_status()
2065 int status = -EIO; in call_bind_status()
2067 if (rpc_task_transmitted(task)) { in call_bind_status()
2072 if (task->tk_status >= 0) in call_bind_status()
2074 if (xprt_bound(xprt)) { in call_bind_status()
2075 task->tk_status = 0; in call_bind_status()
2079 switch (task->tk_status) { in call_bind_status()
2080 case -ENOMEM: in call_bind_status()
2083 case -EACCES: in call_bind_status()
2085 /* fail immediately if this is an RPC ping */ in call_bind_status()
2086 if (task->tk_msg.rpc_proc->p_proc == 0) { in call_bind_status()
2087 status = -EOPNOTSUPP; in call_bind_status()
2092 case -ENOBUFS: in call_bind_status()
2095 case -EAGAIN: in call_bind_status()
2097 case -ETIMEDOUT: in call_bind_status()
2100 case -EPFNOSUPPORT: in call_bind_status()
2104 case -EPROTONOSUPPORT: in call_bind_status()
2107 case -ENETDOWN: in call_bind_status()
2108 case -ENETUNREACH: in call_bind_status()
2109 if (task->tk_flags & RPC_TASK_NETUNREACH_FATAL) in call_bind_status()
2112 case -ECONNREFUSED: /* connection problems */ in call_bind_status()
2113 case -ECONNRESET: in call_bind_status()
2114 case -ECONNABORTED: in call_bind_status()
2115 case -ENOTCONN: in call_bind_status()
2116 case -EHOSTDOWN: in call_bind_status()
2117 case -EHOSTUNREACH: in call_bind_status()
2118 case -EPIPE: in call_bind_status()
2120 if (!RPC_IS_SOFTCONN(task)) { in call_bind_status()
2124 status = task->tk_status; in call_bind_status()
2133 task->tk_action = call_connect; in call_bind_status()
2136 task->tk_status = 0; in call_bind_status()
2137 task->tk_action = call_bind; in call_bind_status()
2142 * 4b. Connect to the RPC server
2147 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_connect()
2149 if (rpc_task_transmitted(task)) { in call_connect()
2154 if (xprt_connected(xprt)) { in call_connect()
2155 task->tk_action = call_transmit; in call_connect()
2159 task->tk_action = call_connect_status; in call_connect()
2160 if (task->tk_status < 0) in call_connect()
2162 if (task->tk_flags & RPC_TASK_NOCONNECT) { in call_connect()
2163 rpc_call_rpcerror(task, -ENOTCONN); in call_connect()
2166 if (!xprt_prepare_transmit(task)) in call_connect()
2177 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_connect_status()
2178 struct rpc_clnt *clnt = task->tk_client; in call_connect_status()
2179 int status = task->tk_status; in call_connect_status()
2181 if (rpc_task_transmitted(task)) { in call_connect_status()
2188 if (task->tk_status == 0) { in call_connect_status()
2189 clnt->cl_stats->netreconn++; in call_connect_status()
2192 if (xprt_connected(xprt)) { in call_connect_status()
2193 task->tk_status = 0; in call_connect_status()
2197 task->tk_status = 0; in call_connect_status()
2199 case -ENETDOWN: in call_connect_status()
2200 case -ENETUNREACH: in call_connect_status()
2201 if (task->tk_flags & RPC_TASK_NETUNREACH_FATAL) in call_connect_status()
2204 case -ECONNREFUSED: in call_connect_status()
2205 case -ECONNRESET: in call_connect_status()
2207 if (clnt->cl_autobind) { in call_connect_status()
2209 if (RPC_IS_SOFTCONN(task)) in call_connect_status()
2214 case -ECONNABORTED: in call_connect_status()
2215 case -EHOSTUNREACH: in call_connect_status()
2216 case -EPIPE: in call_connect_status()
2217 case -EPROTO: in call_connect_status()
2218 xprt_conditional_disconnect(task->tk_rqstp->rq_xprt, in call_connect_status()
2219 task->tk_rqstp->rq_connect_cookie); in call_connect_status()
2220 if (RPC_IS_SOFTCONN(task)) in call_connect_status()
2225 case -EADDRINUSE: in call_connect_status()
2226 case -ENOTCONN: in call_connect_status()
2227 case -EAGAIN: in call_connect_status()
2228 case -ETIMEDOUT: in call_connect_status()
2229 if (!(task->tk_flags & RPC_TASK_NO_ROUND_ROBIN) && in call_connect_status()
2230 (task->tk_flags & RPC_TASK_MOVEABLE) && in call_connect_status()
2231 test_bit(XPRT_REMOVE, &xprt->state)) { in call_connect_status()
2232 struct rpc_xprt *saved = task->tk_xprt; in call_connect_status()
2236 if (xps->xps_nxprts > 1) { in call_connect_status()
2240 value = atomic_long_dec_return(&xprt->queuelen); in call_connect_status()
2241 if (value == 0) in call_connect_status()
2245 task->tk_xprt = NULL; in call_connect_status()
2246 task->tk_action = call_start; in call_connect_status()
2249 if (!task->tk_xprt) in call_connect_status()
2253 case -ENOBUFS: in call_connect_status()
2260 task->tk_action = call_transmit; in call_connect_status()
2264 task->tk_action = call_bind; in call_connect_status()
2270 * 5. Transmit the RPC request, and wait for reply
2275 if (rpc_task_transmitted(task)) { in call_transmit()
2280 task->tk_action = call_transmit_status; in call_transmit()
2281 if (!xprt_prepare_transmit(task)) in call_transmit()
2283 task->tk_status = 0; in call_transmit()
2284 if (test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) { in call_transmit()
2285 if (!xprt_connected(task->tk_xprt)) { in call_transmit()
2286 task->tk_status = -ENOTCONN; in call_transmit()
2300 task->tk_action = call_status; in call_transmit_status()
2306 if (rpc_task_transmitted(task)) { in call_transmit_status()
2307 task->tk_status = 0; in call_transmit_status()
2312 switch (task->tk_status) { in call_transmit_status()
2315 case -EBADMSG: in call_transmit_status()
2316 task->tk_status = 0; in call_transmit_status()
2317 task->tk_action = call_encode; in call_transmit_status()
2320 * Special cases: if we've been waiting on the in call_transmit_status()
2321 * socket's write_space() callback, or if the in call_transmit_status()
2325 case -ENOMEM: in call_transmit_status()
2326 case -ENOBUFS: in call_transmit_status()
2329 case -EBADSLT: in call_transmit_status()
2330 case -EAGAIN: in call_transmit_status()
2331 task->tk_action = call_transmit; in call_transmit_status()
2332 task->tk_status = 0; in call_transmit_status()
2334 case -EHOSTDOWN: in call_transmit_status()
2335 case -ENETDOWN: in call_transmit_status()
2336 case -EHOSTUNREACH: in call_transmit_status()
2337 case -ENETUNREACH: in call_transmit_status()
2338 case -EPERM: in call_transmit_status()
2340 case -ECONNREFUSED: in call_transmit_status()
2341 if (RPC_IS_SOFTCONN(task)) { in call_transmit_status()
2342 if (!task->tk_msg.rpc_proc->p_proc) in call_transmit_status()
2343 trace_xprt_ping(task->tk_xprt, in call_transmit_status()
2344 task->tk_status); in call_transmit_status()
2345 rpc_call_rpcerror(task, task->tk_status); in call_transmit_status()
2349 case -ECONNRESET: in call_transmit_status()
2350 case -ECONNABORTED: in call_transmit_status()
2351 case -EADDRINUSE: in call_transmit_status()
2352 case -ENOTCONN: in call_transmit_status()
2353 case -EPIPE: in call_transmit_status()
2354 task->tk_action = call_bind; in call_transmit_status()
2355 task->tk_status = 0; in call_transmit_status()
2361 #if defined(CONFIG_SUNRPC_BACKCHANNEL)
2369 task->tk_action = call_bc_transmit; in call_bc_encode()
2373 * 5b. Send the backchannel RPC reply. On error, drop the reply. In
2379 task->tk_action = call_bc_transmit_status; in call_bc_transmit()
2380 if (test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) { in call_bc_transmit()
2381 if (!xprt_prepare_transmit(task)) in call_bc_transmit()
2383 task->tk_status = 0; in call_bc_transmit()
2392 struct rpc_rqst *req = task->tk_rqstp; in call_bc_transmit_status()
2394 if (rpc_task_transmitted(task)) in call_bc_transmit_status()
2395 task->tk_status = 0; in call_bc_transmit_status()
2397 switch (task->tk_status) { in call_bc_transmit_status()
2400 case -ENETDOWN: in call_bc_transmit_status()
2401 case -EHOSTDOWN: in call_bc_transmit_status()
2402 case -EHOSTUNREACH: in call_bc_transmit_status()
2403 case -ENETUNREACH: in call_bc_transmit_status()
2404 case -ECONNRESET: in call_bc_transmit_status()
2405 case -ECONNREFUSED: in call_bc_transmit_status()
2406 case -EADDRINUSE: in call_bc_transmit_status()
2407 case -ENOTCONN: in call_bc_transmit_status()
2408 case -EPIPE: in call_bc_transmit_status()
2410 case -ENOMEM: in call_bc_transmit_status()
2411 case -ENOBUFS: in call_bc_transmit_status()
2414 case -EBADSLT: in call_bc_transmit_status()
2415 case -EAGAIN: in call_bc_transmit_status()
2416 task->tk_status = 0; in call_bc_transmit_status()
2417 task->tk_action = call_bc_transmit; in call_bc_transmit_status()
2419 case -ETIMEDOUT: in call_bc_transmit_status()
2427 printk(KERN_NOTICE "RPC: Could not send backchannel reply " in call_bc_transmit_status()
2428 "error: %d\n", task->tk_status); in call_bc_transmit_status()
2429 xprt_conditional_disconnect(req->rq_xprt, in call_bc_transmit_status()
2430 req->rq_connect_cookie); in call_bc_transmit_status()
2437 printk(KERN_NOTICE "RPC: Could not send backchannel reply " in call_bc_transmit_status()
2438 "error: %d\n", task->tk_status); in call_bc_transmit_status()
2441 task->tk_action = rpc_exit_task; in call_bc_transmit_status()
2446 * 6. Sort out the RPC call status
2451 struct rpc_clnt *clnt = task->tk_client; in call_status()
2454 if (!task->tk_msg.rpc_proc->p_proc) in call_status()
2455 trace_xprt_ping(task->tk_xprt, task->tk_status); in call_status()
2457 status = task->tk_status; in call_status()
2458 if (status >= 0) { in call_status()
2459 task->tk_action = call_decode; in call_status()
2464 task->tk_status = 0; in call_status()
2466 case -ENETDOWN: in call_status()
2467 case -ENETUNREACH: in call_status()
2468 if (task->tk_flags & RPC_TASK_NETUNREACH_FATAL) in call_status()
2471 case -EHOSTDOWN: in call_status()
2472 case -EHOSTUNREACH: in call_status()
2473 case -EPERM: in call_status()
2474 if (RPC_IS_SOFTCONN(task)) in call_status()
2477 * Delay any retries for 3 seconds, then handle as if it in call_status()
2482 case -ETIMEDOUT: in call_status()
2484 case -ECONNREFUSED: in call_status()
2485 case -ECONNRESET: in call_status()
2486 case -ECONNABORTED: in call_status()
2487 case -ENOTCONN: in call_status()
2490 case -EADDRINUSE: in call_status()
2493 case -EPIPE: in call_status()
2494 case -EAGAIN: in call_status()
2496 case -ENFILE: in call_status()
2497 case -ENOBUFS: in call_status()
2498 case -ENOMEM: in call_status()
2501 case -EIO: in call_status()
2505 if (clnt->cl_chatty) in call_status()
2506 printk("%s: RPC call returned error %d\n", in call_status()
2507 clnt->cl_program->name, -status); in call_status()
2510 task->tk_action = call_encode; in call_status()
2521 if (!req || !req->rq_xprt) in rpc_check_connected()
2523 return xprt_connected(req->rq_xprt); in rpc_check_connected()
2529 struct rpc_clnt *clnt = task->tk_client; in rpc_check_timeout()
2531 if (RPC_SIGNALLED(task)) in rpc_check_timeout()
2534 if (xprt_adjust_timeout(task->tk_rqstp) == 0) in rpc_check_timeout()
2538 task->tk_timeouts++; in rpc_check_timeout()
2540 if (RPC_IS_SOFTCONN(task) && !rpc_check_connected(task->tk_rqstp)) { in rpc_check_timeout()
2541 rpc_call_rpcerror(task, -ETIMEDOUT); in rpc_check_timeout()
2545 if (RPC_IS_SOFT(task)) { in rpc_check_timeout()
2548 * been sent, it should time out only if the transport in rpc_check_timeout()
2551 if ((task->tk_flags & RPC_TASK_NO_RETRANS_TIMEOUT) && in rpc_check_timeout()
2552 rpc_check_connected(task->tk_rqstp)) in rpc_check_timeout()
2555 if (clnt->cl_chatty) { in rpc_check_timeout()
2558 clnt->cl_program->name, in rpc_check_timeout()
2559 task->tk_xprt->servername); in rpc_check_timeout()
2561 if (task->tk_flags & RPC_TASK_TIMEOUT) in rpc_check_timeout()
2562 rpc_call_rpcerror(task, -ETIMEDOUT); in rpc_check_timeout()
2564 __rpc_call_rpcerror(task, -EIO, -ETIMEDOUT); in rpc_check_timeout()
2568 if (!(task->tk_flags & RPC_CALL_MAJORSEEN)) { in rpc_check_timeout()
2569 task->tk_flags |= RPC_CALL_MAJORSEEN; in rpc_check_timeout()
2570 if (clnt->cl_chatty) { in rpc_check_timeout()
2573 clnt->cl_program->name, in rpc_check_timeout()
2574 task->tk_xprt->servername); in rpc_check_timeout()
2579 * Did our request time out due to an RPCSEC_GSS out-of-sequence in rpc_check_timeout()
2586 * 7. Decode the RPC reply
2591 struct rpc_clnt *clnt = task->tk_client; in call_decode()
2592 struct rpc_rqst *req = task->tk_rqstp; in call_decode()
2596 if (!task->tk_msg.rpc_proc->p_decode) { in call_decode()
2597 task->tk_action = rpc_exit_task; in call_decode()
2601 if (task->tk_flags & RPC_CALL_MAJORSEEN) { in call_decode()
2602 if (clnt->cl_chatty) { in call_decode()
2604 clnt->cl_program->name, in call_decode()
2605 task->tk_xprt->servername); in call_decode()
2607 task->tk_flags &= ~RPC_CALL_MAJORSEEN; in call_decode()
2611 * Did we ever call xprt_complete_rqst()? If not, we should assume in call_decode()
2614 err = -EAGAIN; in call_decode()
2615 if (!req->rq_reply_bytes_recvd) in call_decode()
2619 * before it changed req->rq_reply_bytes_recvd. in call_decode()
2623 req->rq_rcv_buf.len = req->rq_private_buf.len; in call_decode()
2624 trace_rpc_xdr_recvfrom(task, &req->rq_rcv_buf); in call_decode()
2627 WARN_ON(memcmp(&req->rq_rcv_buf, &req->rq_private_buf, in call_decode()
2628 sizeof(req->rq_rcv_buf)) != 0); in call_decode()
2630 xdr_init_decode(&xdr, &req->rq_rcv_buf, in call_decode()
2631 req->rq_rcv_buf.head[0].iov_base, req); in call_decode()
2636 task->tk_action = rpc_exit_task; in call_decode()
2637 task->tk_status = rpcauth_unwrap_resp(task, &xdr); in call_decode()
2640 case -EAGAIN: in call_decode()
2641 task->tk_status = 0; in call_decode()
2642 if (task->tk_client->cl_discrtry) in call_decode()
2643 xprt_conditional_disconnect(req->rq_xprt, in call_decode()
2644 req->rq_connect_cookie); in call_decode()
2645 task->tk_action = call_encode; in call_decode()
2648 case -EKEYREJECTED: in call_decode()
2649 task->tk_action = call_reserve; in call_decode()
2652 /* Ensure we obtain a new XID if we retry! */ in call_decode()
2660 struct rpc_clnt *clnt = task->tk_client; in rpc_encode_header()
2661 struct rpc_rqst *req = task->tk_rqstp; in rpc_encode_header()
2665 error = -EMSGSIZE; in rpc_encode_header()
2667 if (!p) in rpc_encode_header()
2669 *p++ = req->rq_xid; in rpc_encode_header()
2672 *p++ = cpu_to_be32(clnt->cl_prog); in rpc_encode_header()
2673 *p++ = cpu_to_be32(clnt->cl_vers); in rpc_encode_header()
2674 *p = cpu_to_be32(task->tk_msg.rpc_proc->p_proc); in rpc_encode_header()
2677 if (error < 0) in rpc_encode_header()
2689 struct rpc_clnt *clnt = task->tk_client; in rpc_decode_header()
2693 /* RFC-1014 says that the representation of XDR data must be a in rpc_decode_header()
2695 * - if it isn't pointer subtraction in the NFS client may give in rpc_decode_header()
2698 if (task->tk_rqstp->rq_rcv_buf.len & 3) in rpc_decode_header()
2702 if (!p) in rpc_decode_header()
2705 if (*p++ != rpc_reply) in rpc_decode_header()
2707 if (*p++ != rpc_msg_accepted) in rpc_decode_header()
2711 if (error) { in rpc_decode_header()
2712 struct rpc_cred *cred = task->tk_rqstp->rq_cred; in rpc_decode_header()
2714 if (!test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { in rpc_decode_header()
2716 if (!task->tk_cred_retry) in rpc_decode_header()
2718 task->tk_cred_retry--; in rpc_decode_header()
2720 return -EKEYREJECTED; in rpc_decode_header()
2726 if (!p) in rpc_decode_header()
2733 error = -EPFNOSUPPORT; in rpc_decode_header()
2737 error = -EPROTONOSUPPORT; in rpc_decode_header()
2741 error = -EOPNOTSUPP; in rpc_decode_header()
2746 error = -EIO; in rpc_decode_header()
2753 clnt->cl_stats->rpcgarbage++; in rpc_decode_header()
2754 if (task->tk_garb_retry) { in rpc_decode_header()
2755 task->tk_garb_retry--; in rpc_decode_header()
2756 task->tk_action = call_encode; in rpc_decode_header()
2757 return -EAGAIN; in rpc_decode_header()
2765 error = -EIO; in rpc_decode_header()
2771 case -EPROTONOSUPPORT: in rpc_decode_header()
2773 case -EACCES: in rpc_decode_header()
2774 /* Re-encode with a fresh cred */ in rpc_decode_header()
2781 error = -EACCES; in rpc_decode_header()
2783 if (!p) in rpc_decode_header()
2790 error = -EPROTONOSUPPORT; in rpc_decode_header()
2797 if (!p) in rpc_decode_header()
2805 if (!task->tk_cred_retry) in rpc_decode_header()
2807 task->tk_cred_retry--; in rpc_decode_header()
2809 return -EKEYREJECTED; in rpc_decode_header()
2813 if (!task->tk_garb_retry) in rpc_decode_header()
2815 task->tk_garb_retry--; in rpc_decode_header()
2817 task->tk_action = call_encode; in rpc_decode_header()
2818 return -EAGAIN; in rpc_decode_header()
2821 pr_warn("RPC: server %s requires stronger authentication.\n", in rpc_decode_header()
2822 task->tk_xprt->servername); in rpc_decode_header()
2853 task->tk_flags &= ~RPC_TASK_NO_RETRANS_TIMEOUT; in rpc_null_call_prepare()
2895 if (clnt->cl_auth->au_ops->ping) in rpc_ping()
2896 return clnt->cl_auth->au_ops->ping(clnt); in rpc_ping()
2899 if (IS_ERR(task)) in rpc_ping()
2901 status = task->tk_status; in rpc_ping()
2921 if (IS_ERR(task)) in rpc_ping_noreply()
2923 status = task->tk_status; in rpc_ping_noreply()
2937 if (task->tk_status == 0) in rpc_cb_add_xprt_done()
2938 rpc_xprt_switch_add_xprt(data->xps, data->xprt); in rpc_cb_add_xprt_done()
2945 xprt_put(data->xprt); in rpc_cb_add_xprt_release()
2946 xprt_switch_put(data->xps); in rpc_cb_add_xprt_release()
2957 * rpc_clnt_test_and_add_xprt - Test and add a new transport to a rpc_clnt
2969 int max_connect = clnt->cl_max_connect; in rpc_clnt_test_and_add_xprt()
2971 if (in_max_connect) in rpc_clnt_test_and_add_xprt()
2973 if (xps->xps_nunique_destaddr_xprts + 1 > max_connect) { in rpc_clnt_test_and_add_xprt()
2979 return -EINVAL; in rpc_clnt_test_and_add_xprt()
2983 if (!data) in rpc_clnt_test_and_add_xprt()
2984 return -ENOMEM; in rpc_clnt_test_and_add_xprt()
2985 data->xps = xprt_switch_get(xps); in rpc_clnt_test_and_add_xprt()
2986 data->xprt = xprt_get(xprt); in rpc_clnt_test_and_add_xprt()
2987 if (rpc_xprt_switch_has_addr(data->xps, (struct sockaddr *)&xprt->addr)) { in rpc_clnt_test_and_add_xprt()
2994 if (IS_ERR(task)) in rpc_clnt_test_and_add_xprt()
2997 data->xps->xps_nunique_destaddr_xprts++; in rpc_clnt_test_and_add_xprt()
3009 int status = -EADDRINUSE; in rpc_clnt_add_xprt_helper()
3013 if (IS_ERR(task)) in rpc_clnt_add_xprt_helper()
3016 status = task->tk_status; in rpc_clnt_add_xprt_helper()
3019 if (status < 0) in rpc_clnt_add_xprt_helper()
3023 data->add_xprt_test(clnt, xprt, data->data); in rpc_clnt_add_xprt_helper()
3051 int status = -EADDRINUSE; in rpc_clnt_setup_test_and_add_xprt()
3056 if (rpc_xprt_switch_has_addr(xps, (struct sockaddr *)&xprt->addr)) in rpc_clnt_setup_test_and_add_xprt()
3060 if (status < 0) in rpc_clnt_setup_test_and_add_xprt()
3067 if (status < 0) in rpc_clnt_setup_test_and_add_xprt()
3068 pr_info("RPC: rpc_clnt_test_xprt failed: %d addr %s not " in rpc_clnt_setup_test_and_add_xprt()
3070 xprt->address_strings[RPC_DISPLAY_ADDR]); in rpc_clnt_setup_test_and_add_xprt()
3077 * rpc_clnt_add_xprt - Add a new transport to a rpc_clnt
3085 * If ping is set, then test that connectivity succeeds before
3105 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in rpc_clnt_add_xprt()
3106 xprt = xprt_iter_xprt(&clnt->cl_xpi); in rpc_clnt_add_xprt()
3107 if (xps == NULL || xprt == NULL) { in rpc_clnt_add_xprt()
3110 return -EAGAIN; in rpc_clnt_add_xprt()
3112 resvport = xprt->resvport; in rpc_clnt_add_xprt()
3113 reuseport = xprt->reuseport; in rpc_clnt_add_xprt()
3114 connect_timeout = xprt->connect_timeout; in rpc_clnt_add_xprt()
3115 reconnect_timeout = xprt->max_reconnect_timeout; in rpc_clnt_add_xprt()
3116 ident = xprt->xprt_class->ident; in rpc_clnt_add_xprt()
3119 if (!xprtargs->ident) in rpc_clnt_add_xprt()
3120 xprtargs->ident = ident; in rpc_clnt_add_xprt()
3121 xprtargs->xprtsec = clnt->cl_xprtsec; in rpc_clnt_add_xprt()
3123 if (IS_ERR(xprt)) { in rpc_clnt_add_xprt()
3127 xprt->resvport = resvport; in rpc_clnt_add_xprt()
3128 xprt->reuseport = reuseport; in rpc_clnt_add_xprt()
3130 if (xprtargs->connect_timeout) in rpc_clnt_add_xprt()
3131 connect_timeout = xprtargs->connect_timeout; in rpc_clnt_add_xprt()
3132 if (xprtargs->reconnect_timeout) in rpc_clnt_add_xprt()
3133 reconnect_timeout = xprtargs->reconnect_timeout; in rpc_clnt_add_xprt()
3134 if (xprt->ops->set_connect_timeout != NULL) in rpc_clnt_add_xprt()
3135 xprt->ops->set_connect_timeout(xprt, in rpc_clnt_add_xprt()
3140 if (setup) { in rpc_clnt_add_xprt()
3142 if (ret != 0) in rpc_clnt_add_xprt()
3164 main_xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); in rpc_xprt_probe_trunked()
3165 status = rpc_cmp_addr_port((struct sockaddr *)&xprt->addr, in rpc_xprt_probe_trunked()
3166 (struct sockaddr *)&main_xprt->addr); in rpc_xprt_probe_trunked()
3169 if (status || !test_bit(XPRT_OFFLINE, &xprt->state)) in rpc_xprt_probe_trunked()
3178 /* rpc_clnt_probe_trunked_xprt -- probe offlined transport for session trunking
3182 * the function rpc_xprt_probe_trunked() which will determine if this
3192 if (ret) in rpc_clnt_probe_trunked_xprts()
3197 if (!xprt) in rpc_clnt_probe_trunked_xprts()
3201 if (ret < 0) in rpc_clnt_probe_trunked_xprts()
3220 main_xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); in rpc_xprt_offline()
3221 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in rpc_xprt_offline()
3222 err = rpc_cmp_addr_port((struct sockaddr *)&xprt->addr, in rpc_xprt_offline()
3223 (struct sockaddr *)&main_xprt->addr); in rpc_xprt_offline()
3226 if (err) in rpc_xprt_offline()
3229 if (wait_on_bit_lock(&xprt->state, XPRT_LOCKED, TASK_KILLABLE)) { in rpc_xprt_offline()
3230 err = -EINTR; in rpc_xprt_offline()
3242 /* rpc_clnt_manage_trunked_xprts -- offline trunked transports
3267 if (xprt->ops->set_connect_timeout) in rpc_xprt_set_connect_timeout()
3268 xprt->ops->set_connect_timeout(xprt, in rpc_xprt_set_connect_timeout()
3269 timeo->connect_timeout, in rpc_xprt_set_connect_timeout()
3270 timeo->reconnect_timeout); in rpc_xprt_set_connect_timeout()
3302 if (rpc_clnt_xprt_switch_has_addr(clnt, in rpc_clnt_xprt_switch_add_xprt()
3303 (const struct sockaddr *)&xprt->addr)) { in rpc_clnt_xprt_switch_add_xprt()
3318 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_clnt_xprt_switch_remove_xprt()
3319 rpc_xprt_switch_remove_xprt(rcu_dereference(clnt->cl_xpi.xpi_xpswitch), in rpc_clnt_xprt_switch_remove_xprt()
3321 xps->xps_nunique_destaddr_xprts--; in rpc_clnt_xprt_switch_remove_xprt()
3333 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_clnt_xprt_switch_has_addr()
3340 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
3343 printk(KERN_INFO "clnt[%pISpc] RPC tasks[%d]\n", in rpc_show_header()
3344 (struct sockaddr *)&clnt->cl_xprt->addr, in rpc_show_header()
3345 atomic_read(&clnt->cl_task_count)); in rpc_show_header()
3346 printk(KERN_INFO "-pid- flgs status -client- --rqstp- " in rpc_show_header()
3347 "-timeout ---ops--\n"); in rpc_show_header()
3355 if (RPC_IS_QUEUED(task)) in rpc_show_task()
3356 rpc_waitq = rpc_qname(task->tk_waitqueue); in rpc_show_task()
3359 task->tk_pid, task->tk_flags, task->tk_status, in rpc_show_task()
3360 clnt, task->tk_rqstp, rpc_task_timeout(task), task->tk_ops, in rpc_show_task()
3361 clnt->cl_program->name, clnt->cl_vers, rpc_proc_name(task), in rpc_show_task()
3362 task->tk_action, rpc_waitq); in rpc_show_task()
3372 spin_lock(&sn->rpc_client_lock); in rpc_show_tasks()
3373 list_for_each_entry(clnt, &sn->all_clients, cl_clients) { in rpc_show_tasks()
3374 spin_lock(&clnt->cl_lock); in rpc_show_tasks()
3375 list_for_each_entry(task, &clnt->cl_tasks, tk_task) { in rpc_show_tasks()
3376 if (!header) { in rpc_show_tasks()
3382 spin_unlock(&clnt->cl_lock); in rpc_show_tasks()
3384 spin_unlock(&sn->rpc_client_lock); in rpc_show_tasks()
3388 #if IS_ENABLED(CONFIG_SUNRPC_SWAP)
3400 while (clnt != clnt->cl_parent) in rpc_clnt_swap_activate()
3401 clnt = clnt->cl_parent; in rpc_clnt_swap_activate()
3402 if (atomic_inc_return(&clnt->cl_swapper) == 1) in rpc_clnt_swap_activate()
3421 while (clnt != clnt->cl_parent) in rpc_clnt_swap_deactivate()
3422 clnt = clnt->cl_parent; in rpc_clnt_swap_deactivate()
3423 if (atomic_dec_if_positive(&clnt->cl_swapper) == 0) in rpc_clnt_swap_deactivate()