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)
52 * All RPC clients are linked into this list
87 spin_lock(&sn->rpc_client_lock); in rpc_register_client()
88 list_add(&clnt->cl_clients, &sn->all_clients); in rpc_register_client()
89 spin_unlock(&sn->rpc_client_lock); in rpc_register_client()
97 spin_lock(&sn->rpc_client_lock); in rpc_unregister_client()
98 list_del(&clnt->cl_clients); in rpc_unregister_client()
99 spin_unlock(&sn->rpc_client_lock); in rpc_unregister_client()
113 if (pipefs_sb) { in rpc_clnt_remove_pipedir()
114 if (pipefs_sb == clnt->pipefs_sb) in rpc_clnt_remove_pipedir()
124 const char *dir_name = clnt->cl_program->pipe_dir_name; in rpc_setup_pipedir_sb()
129 if (dir == NULL) { in rpc_setup_pipedir_sb()
130 pr_info("RPC: pipefs directory doesn't exist: %s\n", dir_name); in rpc_setup_pipedir_sb()
135 name[sizeof(name) - 1] = '\0'; in rpc_setup_pipedir_sb()
137 if (!IS_ERR(dentry)) in rpc_setup_pipedir_sb()
139 if (dentry == ERR_PTR(-EEXIST)) in rpc_setup_pipedir_sb()
141 printk(KERN_INFO "RPC: Couldn't create pipefs entry" in rpc_setup_pipedir_sb()
155 clnt->pipefs_sb = pipefs_sb; in rpc_setup_pipedir()
157 if (clnt->cl_program->pipe_dir_name != NULL) { in rpc_setup_pipedir()
159 if (IS_ERR(dentry)) in rpc_setup_pipedir()
167 if (clnt->cl_program->pipe_dir_name == NULL) in rpc_clnt_skip_event()
172 if (clnt->cl_pipedir_objects.pdh_dentry != NULL) in rpc_clnt_skip_event()
174 if (refcount_read(&clnt->cl_count) == 0) in rpc_clnt_skip_event()
178 if (clnt->cl_pipedir_objects.pdh_dentry == NULL) in rpc_clnt_skip_event()
193 if (!dentry) in __rpc_clnt_handle_event()
194 return -ENOENT; in __rpc_clnt_handle_event()
195 if (IS_ERR(dentry)) in __rpc_clnt_handle_event()
203 return -ENOTSUPP; in __rpc_clnt_handle_event()
213 for (;; clnt = clnt->cl_parent) { in __rpc_pipefs_event()
214 if (!rpc_clnt_skip_event(clnt, event)) in __rpc_pipefs_event()
216 if (error || clnt == clnt->cl_parent) in __rpc_pipefs_event()
227 spin_lock(&sn->rpc_client_lock); in rpc_get_client_for_event()
228 list_for_each_entry(clnt, &sn->all_clients, cl_clients) { in rpc_get_client_for_event()
229 if (rpc_clnt_skip_event(clnt, event)) in rpc_get_client_for_event()
231 spin_unlock(&sn->rpc_client_lock); in rpc_get_client_for_event()
234 spin_unlock(&sn->rpc_client_lock); in rpc_get_client_for_event()
245 while ((clnt = rpc_get_client_for_event(sb->s_fs_info, event))) { in rpc_pipefs_event()
247 if (error) in rpc_pipefs_event()
274 spin_lock(&clnt->cl_lock); in rpc_clnt_set_transport()
275 old = rcu_dereference_protected(clnt->cl_xprt, in rpc_clnt_set_transport()
276 lockdep_is_held(&clnt->cl_lock)); in rpc_clnt_set_transport()
278 clnt->cl_timeout = timeout; in rpc_clnt_set_transport()
279 rcu_assign_pointer(clnt->cl_xprt, xprt); in rpc_clnt_set_transport()
280 spin_unlock(&clnt->cl_lock); in rpc_clnt_set_transport()
287 clnt->cl_nodelen = strlcpy(clnt->cl_nodename, in rpc_clnt_set_nodename()
288 nodename, sizeof(clnt->cl_nodename)); in rpc_clnt_set_nodename()
307 if (pipefs_sb) { in rpc_client_register()
309 if (err) in rpc_client_register()
314 if (pipefs_sb) in rpc_client_register()
318 if (IS_ERR(auth)) { in rpc_client_register()
319 dprintk("RPC: Couldn't create auth handle (flavor %u)\n", in rpc_client_register()
330 if (pipefs_sb) in rpc_client_register()
349 if (clid < 0) in rpc_alloc_clid()
351 clnt->cl_clid = clid; in rpc_alloc_clid()
357 ida_free(&rpc_clids, clnt->cl_clid); in rpc_free_clid()
365 const struct rpc_program *program = args->program; in rpc_new_client()
369 const char *nodename = args->nodename; in rpc_new_client()
373 if (err) in rpc_new_client()
376 err = -EINVAL; in rpc_new_client()
377 if (args->version >= program->nrvers) in rpc_new_client()
379 version = program->version[args->version]; in rpc_new_client()
380 if (version == NULL) in rpc_new_client()
383 err = -ENOMEM; in rpc_new_client()
385 if (!clnt) in rpc_new_client()
387 clnt->cl_parent = parent ? : clnt; in rpc_new_client()
388 clnt->cl_xprtsec = args->xprtsec; in rpc_new_client()
391 if (err) in rpc_new_client()
394 clnt->cl_cred = get_cred(args->cred); in rpc_new_client()
395 clnt->cl_procinfo = version->procs; in rpc_new_client()
396 clnt->cl_maxproc = version->nrprocs; in rpc_new_client()
397 clnt->cl_prog = args->prognumber ? : program->number; in rpc_new_client()
398 clnt->cl_vers = version->number; in rpc_new_client()
399 clnt->cl_stats = args->stats ? : program->stats; in rpc_new_client()
400 clnt->cl_metrics = rpc_alloc_iostats(clnt); in rpc_new_client()
401 rpc_init_pipe_dir_head(&clnt->cl_pipedir_objects); in rpc_new_client()
402 err = -ENOMEM; in rpc_new_client()
403 if (clnt->cl_metrics == NULL) in rpc_new_client()
405 clnt->cl_program = program; in rpc_new_client()
406 INIT_LIST_HEAD(&clnt->cl_tasks); in rpc_new_client()
407 spin_lock_init(&clnt->cl_lock); in rpc_new_client()
409 timeout = xprt->timeout; in rpc_new_client()
410 if (args->timeout != NULL) { in rpc_new_client()
411 memcpy(&clnt->cl_timeout_default, args->timeout, in rpc_new_client()
412 sizeof(clnt->cl_timeout_default)); in rpc_new_client()
413 timeout = &clnt->cl_timeout_default; in rpc_new_client()
417 xprt->main = true; in rpc_new_client()
418 xprt_iter_init(&clnt->cl_xpi, xps); in rpc_new_client()
421 clnt->cl_rtt = &clnt->cl_rtt_default; in rpc_new_client()
422 rpc_init_rtt(&clnt->cl_rtt_default, clnt->cl_timeout->to_initval); in rpc_new_client()
424 refcount_set(&clnt->cl_count, 1); in rpc_new_client()
426 if (nodename == NULL) in rpc_new_client()
427 nodename = utsname()->nodename; in rpc_new_client()
432 err = rpc_client_register(clnt, args->authflavor, args->client_name); in rpc_new_client()
433 if (err) in rpc_new_client()
435 if (parent) in rpc_new_client()
436 refcount_inc(&parent->cl_count); in rpc_new_client()
442 rpc_free_iostats(clnt->cl_metrics); in rpc_new_client()
444 put_cred(clnt->cl_cred); in rpc_new_client()
453 trace_rpc_clnt_new_err(program->name, args->servername, err); in rpc_new_client()
463 if (args->bc_xprt && args->bc_xprt->xpt_bc_xps) { in rpc_create_xprt()
464 WARN_ON_ONCE(!(args->protocol & XPRT_TRANSPORT_BC)); in rpc_create_xprt()
465 xps = args->bc_xprt->xpt_bc_xps; in rpc_create_xprt()
469 if (xps == NULL) { in rpc_create_xprt()
471 return ERR_PTR(-ENOMEM); in rpc_create_xprt()
473 if (xprt->bc_xprt) { in rpc_create_xprt()
475 xprt->bc_xprt->xpt_bc_xps = xps; in rpc_create_xprt()
479 if (IS_ERR(clnt)) in rpc_create_xprt()
482 if (!(args->flags & RPC_CLNT_CREATE_NOPING)) { in rpc_create_xprt()
484 if (err != 0) { in rpc_create_xprt()
488 } else if (args->flags & RPC_CLNT_CREATE_CONNECTED) { in rpc_create_xprt()
490 if (err != 0) { in rpc_create_xprt()
496 clnt->cl_softrtry = 1; in rpc_create_xprt()
497 if (args->flags & (RPC_CLNT_CREATE_HARDRTRY|RPC_CLNT_CREATE_SOFTERR)) { in rpc_create_xprt()
498 clnt->cl_softrtry = 0; in rpc_create_xprt()
499 if (args->flags & RPC_CLNT_CREATE_SOFTERR) in rpc_create_xprt()
500 clnt->cl_softerr = 1; in rpc_create_xprt()
503 if (args->flags & RPC_CLNT_CREATE_AUTOBIND) in rpc_create_xprt()
504 clnt->cl_autobind = 1; in rpc_create_xprt()
505 if (args->flags & RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT) in rpc_create_xprt()
506 clnt->cl_noretranstimeo = 1; in rpc_create_xprt()
507 if (args->flags & RPC_CLNT_CREATE_DISCRTRY) in rpc_create_xprt()
508 clnt->cl_discrtry = 1; in rpc_create_xprt()
509 if (!(args->flags & RPC_CLNT_CREATE_QUIET)) in rpc_create_xprt()
510 clnt->cl_chatty = 1; in rpc_create_xprt()
516 * rpc_create - create an RPC client and transport with one call
519 * Creates and initializes an RPC transport and an RPC client.
521 * It can ping the server in order to determine if it is up, and to see if
529 .net = args->net, in rpc_create()
530 .ident = args->protocol, in rpc_create()
531 .srcaddr = args->saddress, in rpc_create()
532 .dstaddr = args->address, in rpc_create()
533 .addrlen = args->addrsize, in rpc_create()
534 .servername = args->servername, in rpc_create()
535 .bc_xprt = args->bc_xprt, in rpc_create()
536 .xprtsec = args->xprtsec, in rpc_create()
537 .connect_timeout = args->connect_timeout, in rpc_create()
538 .reconnect_timeout = args->reconnect_timeout, in rpc_create()
544 if (args->bc_xprt) { in rpc_create()
545 WARN_ON_ONCE(!(args->protocol & XPRT_TRANSPORT_BC)); in rpc_create()
546 xprt = args->bc_xprt->xpt_bc_xprt; in rpc_create()
547 if (xprt) { in rpc_create()
553 if (args->flags & RPC_CLNT_CREATE_INFINITE_SLOTS) in rpc_create()
555 if (args->flags & RPC_CLNT_CREATE_NO_IDLE_TIMEOUT) in rpc_create()
558 * If the caller chooses not to specify a hostname, whip in rpc_create()
559 * up a string representation of the passed-in address. in rpc_create()
561 if (xprtargs.servername == NULL) { in rpc_create()
563 (struct sockaddr_un *)args->address; in rpc_create()
565 (struct sockaddr_in *)args->address; in rpc_create()
567 (struct sockaddr_in6 *)args->address; in rpc_create()
570 switch (args->address->sa_family) { in rpc_create()
572 if (sun->sun_path[0]) in rpc_create()
574 sun->sun_path); in rpc_create()
577 sun->sun_path+1); in rpc_create()
581 &sin->sin_addr.s_addr); in rpc_create()
585 &sin6->sin6_addr); in rpc_create()
590 return ERR_PTR(-EINVAL); in rpc_create()
596 if (IS_ERR(xprt)) in rpc_create()
600 * By default, kernel RPC client connects from a reserved port. in rpc_create()
605 xprt->resvport = 1; in rpc_create()
606 if (args->flags & RPC_CLNT_CREATE_NONPRIVPORT) in rpc_create()
607 xprt->resvport = 0; in rpc_create()
608 xprt->reuseport = 0; in rpc_create()
609 if (args->flags & RPC_CLNT_CREATE_REUSEPORT) in rpc_create()
610 xprt->reuseport = 1; in rpc_create()
613 if (IS_ERR(clnt) || args->nconnect <= 1) in rpc_create()
616 for (i = 0; i < args->nconnect - 1; i++) { in rpc_create()
617 if (rpc_clnt_add_xprt(clnt, &xprtargs, NULL, NULL) < 0) in rpc_create()
625 * This function clones the RPC client structure. It allows us to share the
637 err = -ENOMEM; in __rpc_clone_client()
639 xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); in __rpc_clone_client()
640 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in __rpc_clone_client()
642 if (xprt == NULL || xps == NULL) { in __rpc_clone_client()
647 args->servername = xprt->servername; in __rpc_clone_client()
648 args->nodename = clnt->cl_nodename; in __rpc_clone_client()
651 if (IS_ERR(new)) in __rpc_clone_client()
655 new->cl_autobind = 0; in __rpc_clone_client()
656 new->cl_softrtry = clnt->cl_softrtry; in __rpc_clone_client()
657 new->cl_softerr = clnt->cl_softerr; in __rpc_clone_client()
658 new->cl_noretranstimeo = clnt->cl_noretranstimeo; in __rpc_clone_client()
659 new->cl_discrtry = clnt->cl_discrtry; in __rpc_clone_client()
660 new->cl_chatty = clnt->cl_chatty; in __rpc_clone_client()
661 new->cl_principal = clnt->cl_principal; in __rpc_clone_client()
662 new->cl_max_connect = clnt->cl_max_connect; in __rpc_clone_client()
671 * rpc_clone_client - Clone an RPC client structure
673 * @clnt: RPC client whose parameters are copied
675 * Returns a fresh RPC client or an ERR_PTR.
680 .program = clnt->cl_program, in rpc_clone_client()
681 .prognumber = clnt->cl_prog, in rpc_clone_client()
682 .version = clnt->cl_vers, in rpc_clone_client()
683 .authflavor = clnt->cl_auth->au_flavor, in rpc_clone_client()
684 .cred = clnt->cl_cred, in rpc_clone_client()
685 .stats = clnt->cl_stats, in rpc_clone_client()
692 * rpc_clone_client_set_auth - Clone an RPC client structure and set its auth
694 * @clnt: RPC client whose parameters are copied
697 * Returns a fresh RPC client or an ERR_PTR.
703 .program = clnt->cl_program, in rpc_clone_client_set_auth()
704 .prognumber = clnt->cl_prog, in rpc_clone_client_set_auth()
705 .version = clnt->cl_vers, in rpc_clone_client_set_auth()
707 .cred = clnt->cl_cred, in rpc_clone_client_set_auth()
708 .stats = clnt->cl_stats, in rpc_clone_client_set_auth()
715 * rpc_switch_client_transport: switch the RPC transport on the fly
720 * This function allows the caller to switch the RPC transport for the
723 * there are no active RPC tasks by using some form of locking.
725 * Returns zero if "clnt" is now using the new xprt. Otherwise a
740 args->xprtsec = clnt->cl_xprtsec; in rpc_switch_client_transport()
742 if (IS_ERR(xprt)) in rpc_switch_client_transport()
746 if (xps == NULL) { in rpc_switch_client_transport()
748 return -ENOMEM; in rpc_switch_client_transport()
751 pseudoflavor = clnt->cl_auth->au_flavor; in rpc_switch_client_transport()
753 old_timeo = clnt->cl_timeout; in rpc_switch_client_transport()
755 oldxps = xprt_iter_xchg_switch(&clnt->cl_xpi, xps); in rpc_switch_client_transport()
765 * children, if it has any, still point to the old xprt. in rpc_switch_client_transport()
767 parent = clnt->cl_parent; in rpc_switch_client_transport()
768 clnt->cl_parent = clnt; in rpc_switch_client_transport()
771 * The old rpc_auth cache cannot be re-used. GSS in rpc_switch_client_transport()
776 if (err) in rpc_switch_client_transport()
780 if (parent != clnt) in rpc_switch_client_transport()
788 xps = xprt_iter_xchg_switch(&clnt->cl_xpi, oldxps); in rpc_switch_client_transport()
790 clnt->cl_parent = parent; in rpc_switch_client_transport()
806 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in _rpc_clnt_xprt_iter_init()
808 if (xps == NULL) in _rpc_clnt_xprt_iter_init()
809 return -EAGAIN; in _rpc_clnt_xprt_iter_init()
829 * rpc_clnt_iterate_for_each_xprt - Apply a function to all transports
834 * Iterates through the list of RPC transports currently attached to the
847 if (ret) in rpc_clnt_iterate_for_each_xprt()
852 if (!xprt) in rpc_clnt_iterate_for_each_xprt()
856 if (ret < 0) in rpc_clnt_iterate_for_each_xprt()
873 if (list_empty(&clnt->cl_tasks)) in rpc_killall_tasks()
880 spin_lock(&clnt->cl_lock); in rpc_killall_tasks()
881 list_for_each_entry(rovr, &clnt->cl_tasks, tk_task) in rpc_killall_tasks()
883 spin_unlock(&clnt->cl_lock); in rpc_killall_tasks()
888 * rpc_cancel_tasks - try to cancel a set of RPC tasks
889 * @clnt: Pointer to RPC client
890 * @error: RPC task error value to set
894 * Uses @fnmatch to define a set of RPC tasks that are to be cancelled.
905 if (list_empty(&clnt->cl_tasks)) in rpc_cancel_tasks()
910 spin_lock(&clnt->cl_lock); in rpc_cancel_tasks()
911 list_for_each_entry(task, &clnt->cl_tasks, tk_task) { in rpc_cancel_tasks()
912 if (!RPC_IS_ACTIVATED(task)) in rpc_cancel_tasks()
914 if (!fnmatch(task, data)) in rpc_cancel_tasks()
919 spin_unlock(&clnt->cl_lock); in rpc_cancel_tasks()
927 if (xprt_connected(xprt)) in rpc_clnt_disconnect_xprt()
939 * Properly shut down an RPC client, terminating all outstanding
948 while (!list_empty(&clnt->cl_tasks)) { in rpc_shutdown_client()
951 list_empty(&clnt->cl_tasks), 1*HZ); in rpc_shutdown_client()
959 * Free an RPC client
975 xprt_put(rcu_dereference_raw(clnt->cl_xprt)); in rpc_free_client_work()
986 if (clnt->cl_parent != clnt) in rpc_free_client()
987 parent = clnt->cl_parent; in rpc_free_client()
989 rpc_free_iostats(clnt->cl_metrics); in rpc_free_client()
990 clnt->cl_metrics = NULL; in rpc_free_client()
991 xprt_iter_destroy(&clnt->cl_xpi); in rpc_free_client()
992 put_cred(clnt->cl_cred); in rpc_free_client()
994 INIT_WORK(&clnt->cl_work, rpc_free_client_work); in rpc_free_client()
995 schedule_work(&clnt->cl_work); in rpc_free_client()
1000 * Free an RPC client
1006 * Note: RPCSEC_GSS may need to send NULL RPC calls in order to in rpc_free_auth()
1010 if (clnt->cl_auth != NULL) { in rpc_free_auth()
1011 rpcauth_release(clnt->cl_auth); in rpc_free_auth()
1012 clnt->cl_auth = NULL; in rpc_free_auth()
1014 if (refcount_dec_and_test(&clnt->cl_count)) in rpc_free_auth()
1020 * Release reference to the RPC client
1026 if (list_empty(&clnt->cl_tasks)) in rpc_release_client()
1028 if (refcount_dec_not_one(&clnt->cl_count)) in rpc_release_client()
1036 * rpc_bind_new_program - bind a new RPC program to an existing client
1038 * @program: rpc program to set
1039 * @vers: rpc program version
1041 * Clones the rpc client and sets up a new RPC program. This is mainly
1042 * of use for enabling different RPC programs to share the same transport.
1051 .prognumber = program->number, in rpc_bind_new_program()
1053 .authflavor = old->cl_auth->au_flavor, in rpc_bind_new_program()
1054 .cred = old->cl_cred, in rpc_bind_new_program()
1055 .stats = old->cl_stats, in rpc_bind_new_program()
1056 .timeout = old->cl_timeout, in rpc_bind_new_program()
1062 if (IS_ERR(clnt)) in rpc_bind_new_program()
1065 if (err != 0) { in rpc_bind_new_program()
1079 if (!xprt) in rpc_task_get_xprt()
1082 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_task_get_xprt()
1083 atomic_long_inc(&xps->xps_queuelen); in rpc_task_get_xprt()
1085 atomic_long_inc(&xprt->queuelen); in rpc_task_get_xprt()
1095 atomic_long_dec(&xprt->queuelen); in rpc_task_release_xprt()
1097 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_task_release_xprt()
1098 atomic_long_dec(&xps->xps_queuelen); in rpc_task_release_xprt()
1106 struct rpc_xprt *xprt = task->tk_xprt; in rpc_task_release_transport()
1108 if (xprt) { in rpc_task_release_transport()
1109 task->tk_xprt = NULL; in rpc_task_release_transport()
1110 if (task->tk_client) in rpc_task_release_transport()
1111 rpc_task_release_xprt(task->tk_client, xprt); in rpc_task_release_transport()
1120 struct rpc_clnt *clnt = task->tk_client; in rpc_task_release_client()
1123 if (clnt != NULL) { in rpc_task_release_client()
1125 spin_lock(&clnt->cl_lock); in rpc_task_release_client()
1126 list_del(&task->tk_task); in rpc_task_release_client()
1127 spin_unlock(&clnt->cl_lock); in rpc_task_release_client()
1128 task->tk_client = NULL; in rpc_task_release_client()
1140 xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); in rpc_task_get_first_xprt()
1148 return rpc_task_get_xprt(clnt, xprt_iter_get_next(&clnt->cl_xpi)); in rpc_task_get_next_xprt()
1154 if (task->tk_xprt) { in rpc_task_set_transport()
1155 if (!(test_bit(XPRT_OFFLINE, &task->tk_xprt->state) && in rpc_task_set_transport()
1156 (task->tk_flags & RPC_TASK_MOVEABLE))) in rpc_task_set_transport()
1159 xprt_put(task->tk_xprt); in rpc_task_set_transport()
1161 if (task->tk_flags & RPC_TASK_NO_ROUND_ROBIN) in rpc_task_set_transport()
1162 task->tk_xprt = rpc_task_get_first_xprt(clnt); in rpc_task_set_transport()
1164 task->tk_xprt = rpc_task_get_next_xprt(clnt); in rpc_task_set_transport()
1171 task->tk_client = clnt; in rpc_task_set_client()
1172 refcount_inc(&clnt->cl_count); in rpc_task_set_client()
1173 if (clnt->cl_softrtry) in rpc_task_set_client()
1174 task->tk_flags |= RPC_TASK_SOFT; in rpc_task_set_client()
1175 if (clnt->cl_softerr) in rpc_task_set_client()
1176 task->tk_flags |= RPC_TASK_TIMEOUT; in rpc_task_set_client()
1177 if (clnt->cl_noretranstimeo) in rpc_task_set_client()
1178 task->tk_flags |= RPC_TASK_NO_RETRANS_TIMEOUT; in rpc_task_set_client()
1180 spin_lock(&clnt->cl_lock); in rpc_task_set_client()
1181 list_add_tail(&task->tk_task, &clnt->cl_tasks); in rpc_task_set_client()
1182 spin_unlock(&clnt->cl_lock); in rpc_task_set_client()
1188 if (msg != NULL) { in rpc_task_set_rpc_message()
1189 task->tk_msg.rpc_proc = msg->rpc_proc; in rpc_task_set_rpc_message()
1190 task->tk_msg.rpc_argp = msg->rpc_argp; in rpc_task_set_rpc_message()
1191 task->tk_msg.rpc_resp = msg->rpc_resp; in rpc_task_set_rpc_message()
1192 task->tk_msg.rpc_cred = msg->rpc_cred; in rpc_task_set_rpc_message()
1193 if (!(task->tk_flags & RPC_TASK_CRED_NOREF)) in rpc_task_set_rpc_message()
1194 get_cred(task->tk_msg.rpc_cred); in rpc_task_set_rpc_message()
1199 * Default callback for async RPC calls
1211 * rpc_run_task - Allocate a new RPC task, then run rpc_execute against it
1219 if (IS_ERR(task)) in rpc_run_task()
1222 if (!RPC_IS_ASYNC(task)) in rpc_run_task()
1223 task->tk_flags |= RPC_TASK_CRED_NOREF; in rpc_run_task()
1225 rpc_task_set_client(task, task_setup_data->rpc_client); in rpc_run_task()
1226 rpc_task_set_rpc_message(task, task_setup_data->rpc_message); in rpc_run_task()
1228 if (task->tk_action == NULL) in rpc_run_task()
1231 atomic_inc(&task->tk_count); in rpc_run_task()
1238 * rpc_call_sync - Perform a synchronous RPC call
1239 * @clnt: pointer to RPC client
1240 * @msg: RPC call parameters
1241 * @flags: RPC call flags
1255 if (flags & RPC_TASK_ASYNC) { in rpc_call_sync()
1258 return -EINVAL; in rpc_call_sync()
1262 if (IS_ERR(task)) in rpc_call_sync()
1264 status = task->tk_status; in rpc_call_sync()
1271 * rpc_call_async - Perform an asynchronous RPC call
1272 * @clnt: pointer to RPC client
1273 * @msg: RPC call parameters
1274 * @flags: RPC call flags
1275 * @tk_ops: RPC call ops
1292 if (IS_ERR(task)) in rpc_call_async()
1299 #if defined(CONFIG_SUNRPC_BACKCHANNEL)
1303 * rpc_run_bc_task - Allocate a new RPC task for backchannel use, then run
1305 * @req: RPC request
1316 dprintk("RPC: rpc_run_bc_task req= %p\n", req); in rpc_run_bc_task()
1321 if (IS_ERR(task)) { in rpc_run_bc_task()
1328 task->tk_action = call_bc_encode; in rpc_run_bc_task()
1329 atomic_inc(&task->tk_count); in rpc_run_bc_task()
1330 WARN_ON_ONCE(atomic_read(&task->tk_count) != 2); in rpc_run_bc_task()
1333 dprintk("RPC: rpc_run_bc_task: task= %p\n", task); in rpc_run_bc_task()
1339 * rpc_prepare_reply_pages - Prepare to receive a reply data payload into pages
1340 * @req: RPC request to prepare
1351 hdrsize += RPC_REPHDRSIZE + req->rq_cred->cr_auth->au_ralign; in rpc_prepare_reply_pages()
1353 xdr_inline_pages(&req->rq_rcv_buf, hdrsize << 2, pages, base, len); in rpc_prepare_reply_pages()
1354 trace_rpc_xdr_reply_pages(req->rq_task, &req->rq_rcv_buf); in rpc_prepare_reply_pages()
1361 task->tk_action = call_start; in rpc_call_start()
1366 * rpc_peeraddr - extract remote peer address from clnt's xprt
1367 * @clnt: RPC client structure
1379 xprt = rcu_dereference(clnt->cl_xprt); in rpc_peeraddr()
1381 bytes = xprt->addrlen; in rpc_peeraddr()
1382 if (bytes > bufsize) in rpc_peeraddr()
1384 memcpy(buf, &xprt->addr, bytes); in rpc_peeraddr()
1392 * rpc_peeraddr2str - return remote peer address in printable format
1393 * @clnt: RPC client structure
1405 xprt = rcu_dereference(clnt->cl_xprt); in rpc_peeraddr2str()
1407 if (xprt->address_strings[format] != NULL) in rpc_peeraddr2str()
1408 return xprt->address_strings[format]; in rpc_peeraddr2str()
1429 * Returns zero and fills in "buf" if successful; otherwise, a
1438 err = __sock_create(net, sap->sa_family, in rpc_sockname()
1440 if (err < 0) { in rpc_sockname()
1441 dprintk("RPC: can't create UDP socket (%d)\n", err); in rpc_sockname()
1445 switch (sap->sa_family) { in rpc_sockname()
1457 err = -EAFNOSUPPORT; in rpc_sockname()
1460 if (err < 0) { in rpc_sockname()
1461 dprintk("RPC: can't bind UDP socket (%d)\n", err); in rpc_sockname()
1466 if (err < 0) { in rpc_sockname()
1467 dprintk("RPC: can't connect UDP socket (%d)\n", err); in rpc_sockname()
1472 if (err < 0) { in rpc_sockname()
1473 dprintk("RPC: getsockname failed (%d)\n", err); in rpc_sockname()
1478 if (buf->sa_family == AF_INET6) { in rpc_sockname()
1480 sin6->sin6_scope_id = 0; in rpc_sockname()
1482 dprintk("RPC: %s succeeded\n", __func__); in rpc_sockname()
1495 * Returns zero and fills in "buf" if successful; otherwise, a
1502 if (buflen < sizeof(rpc_inaddr_loopback)) in rpc_anyaddr()
1503 return -EINVAL; in rpc_anyaddr()
1508 if (buflen < sizeof(rpc_in6addr_loopback)) in rpc_anyaddr()
1509 return -EINVAL; in rpc_anyaddr()
1514 dprintk("RPC: %s: address family not supported\n", in rpc_anyaddr()
1516 return -EAFNOSUPPORT; in rpc_anyaddr()
1518 dprintk("RPC: %s: succeeded\n", __func__); in rpc_anyaddr()
1523 * rpc_localaddr - discover local endpoint address for an RPC client
1524 * @clnt: RPC client structure
1528 * Returns zero and fills in "buf" and "buflen" if successful;
1531 * This works even if the underlying transport is not currently connected,
1532 * or if the upper layer never previously provided a source address.
1548 xprt = rcu_dereference(clnt->cl_xprt); in rpc_localaddr()
1549 salen = xprt->addrlen; in rpc_localaddr()
1550 memcpy(sap, &xprt->addr, salen); in rpc_localaddr()
1551 net = get_net(xprt->xprt_net); in rpc_localaddr()
1557 if (err != 0) in rpc_localaddr()
1559 return rpc_anyaddr(sap->sa_family, buf, buflen); in rpc_localaddr()
1570 xprt = rcu_dereference(clnt->cl_xprt); in rpc_setbufsize()
1571 if (xprt->ops->set_buffer_size) in rpc_setbufsize()
1572 xprt->ops->set_buffer_size(xprt, sndsize, rcvsize); in rpc_setbufsize()
1578 * rpc_net_ns - Get the network namespace for this RPC client
1579 * @clnt: RPC client to query
1587 ret = rcu_dereference(clnt->cl_xprt)->xprt_net; in rpc_net_ns()
1594 * rpc_max_payload - Get maximum payload size for a transport, in bytes
1595 * @clnt: RPC client to query
1597 * For stream transports, this is one RPC record fragment (see RFC
1598 * 1831), as we don't support multi-record requests yet. For datagram
1600 * RPC header sizes.
1607 ret = rcu_dereference(clnt->cl_xprt)->max_payload; in rpc_max_payload()
1614 * rpc_max_bc_payload - Get maximum backchannel payload size, in bytes
1615 * @clnt: RPC client to query
1623 xprt = rcu_dereference(clnt->cl_xprt); in rpc_max_bc_payload()
1624 ret = xprt->ops->bc_maxpayload(xprt); in rpc_max_bc_payload()
1636 xprt = rcu_dereference(clnt->cl_xprt); in rpc_num_bc_slots()
1637 ret = xprt->ops->bc_num_slots(xprt); in rpc_num_bc_slots()
1644 * rpc_force_rebind - force transport to check that remote port is unchanged
1650 if (clnt->cl_autobind) { in rpc_force_rebind()
1652 xprt_clear_bound(rcu_dereference(clnt->cl_xprt)); in rpc_force_rebind()
1661 task->tk_status = 0; in __rpc_restart_call()
1662 task->tk_rpc_status = 0; in __rpc_restart_call()
1663 task->tk_action = action; in __rpc_restart_call()
1668 * Restart an (async) RPC call. Usually called from within the
1679 * Restart an (async) RPC call from the call_prepare state.
1685 if (task->tk_ops->rpc_call_prepare != NULL) in rpc_restart_call_prepare()
1694 const struct rpc_procinfo *proc = task->tk_msg.rpc_proc; in rpc_proc_name()
1696 if (proc) { in rpc_proc_name()
1697 if (proc->p_name) in rpc_proc_name()
1698 return proc->p_name; in rpc_proc_name()
1723 * this state is visited exactly once for each RPC.
1728 struct rpc_clnt *clnt = task->tk_client; in call_start()
1729 int idx = task->tk_msg.rpc_proc->p_statidx; in call_start()
1733 if (task->tk_client->cl_shutdown) { in call_start()
1734 rpc_call_rpcerror(task, -EIO); in call_start()
1739 if (clnt->cl_program->version[clnt->cl_vers]) in call_start()
1740 clnt->cl_program->version[clnt->cl_vers]->counts[idx]++; in call_start()
1741 clnt->cl_stats->rpccnt++; in call_start()
1742 task->tk_action = call_reserve; in call_start()
1747 * 1. Reserve an RPC call slot
1752 task->tk_status = 0; in call_reserve()
1753 task->tk_action = call_reserveresult; in call_reserve()
1765 int status = task->tk_status; in call_reserveresult()
1771 task->tk_status = 0; in call_reserveresult()
1772 if (status >= 0) { in call_reserveresult()
1773 if (task->tk_rqstp) { in call_reserveresult()
1774 task->tk_action = call_refresh; in call_reserveresult()
1778 rpc_call_rpcerror(task, -EIO); in call_reserveresult()
1783 case -ENOMEM: in call_reserveresult()
1786 case -EAGAIN: /* woken up; retry */ in call_reserveresult()
1787 task->tk_action = call_retry_reserve; in call_reserveresult()
1795 * 1c. Retry reserving an RPC call slot
1800 task->tk_status = 0; in call_retry_reserve()
1801 task->tk_action = call_reserveresult; in call_retry_reserve()
1811 task->tk_action = call_refreshresult; in call_refresh()
1812 task->tk_status = 0; in call_refresh()
1813 task->tk_client->cl_stats->rpcauthrefresh++; in call_refresh()
1823 int status = task->tk_status; in call_refreshresult()
1825 task->tk_status = 0; in call_refreshresult()
1826 task->tk_action = call_refresh; in call_refreshresult()
1829 if (rpcauth_uptodatecred(task)) { in call_refreshresult()
1830 task->tk_action = call_allocate; in call_refreshresult()
1833 /* Use rate-limiting and a max number of retries if refresh in call_refreshresult()
1837 case -ETIMEDOUT: in call_refreshresult()
1840 case -EAGAIN: in call_refreshresult()
1841 status = -EACCES; in call_refreshresult()
1843 case -EKEYEXPIRED: in call_refreshresult()
1844 if (!task->tk_cred_retry) in call_refreshresult()
1846 task->tk_cred_retry--; in call_refreshresult()
1849 case -ENOMEM: in call_refreshresult()
1864 const struct rpc_auth *auth = task->tk_rqstp->rq_cred->cr_auth; in call_allocate()
1865 struct rpc_rqst *req = task->tk_rqstp; in call_allocate()
1866 struct rpc_xprt *xprt = req->rq_xprt; in call_allocate()
1867 const struct rpc_procinfo *proc = task->tk_msg.rpc_proc; in call_allocate()
1870 task->tk_status = 0; in call_allocate()
1871 task->tk_action = call_encode; in call_allocate()
1873 if (req->rq_buffer) in call_allocate()
1876 if (proc->p_proc != 0) { in call_allocate()
1877 BUG_ON(proc->p_arglen == 0); in call_allocate()
1878 if (proc->p_decode != NULL) in call_allocate()
1879 BUG_ON(proc->p_replen == 0); in call_allocate()
1883 * Calculate the size (in quads) of the RPC call in call_allocate()
1887 req->rq_callsize = RPC_CALLHDRSIZE + (auth->au_cslack << 1) + in call_allocate()
1888 proc->p_arglen; in call_allocate()
1889 req->rq_callsize <<= 2; in call_allocate()
1894 req->rq_rcvsize = RPC_REPHDRSIZE + auth->au_rslack + \ in call_allocate()
1895 max_t(size_t, proc->p_replen, 2); in call_allocate()
1896 req->rq_rcvsize <<= 2; in call_allocate()
1898 status = xprt->ops->buf_alloc(task); in call_allocate()
1900 if (status == 0) in call_allocate()
1902 if (status != -ENOMEM) { in call_allocate()
1907 if (RPC_IS_ASYNC(task) || !fatal_signal_pending(current)) { in call_allocate()
1908 task->tk_action = call_allocate; in call_allocate()
1913 rpc_call_rpcerror(task, -ERESTARTSYS); in call_allocate()
1919 return test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate) == 0 && in rpc_task_need_encode()
1920 (!(task->tk_flags & RPC_TASK_SENT) || in rpc_task_need_encode()
1921 !(task->tk_flags & RPC_TASK_NO_RETRANS_TIMEOUT) || in rpc_task_need_encode()
1928 struct rpc_rqst *req = task->tk_rqstp; in rpc_xdr_encode()
1931 xdr_buf_init(&req->rq_snd_buf, in rpc_xdr_encode()
1932 req->rq_buffer, in rpc_xdr_encode()
1933 req->rq_callsize); in rpc_xdr_encode()
1934 xdr_buf_init(&req->rq_rcv_buf, in rpc_xdr_encode()
1935 req->rq_rbuffer, in rpc_xdr_encode()
1936 req->rq_rcvsize); in rpc_xdr_encode()
1938 req->rq_reply_bytes_recvd = 0; in rpc_xdr_encode()
1939 req->rq_snd_buf.head[0].iov_len = 0; in rpc_xdr_encode()
1940 xdr_init_encode(&xdr, &req->rq_snd_buf, in rpc_xdr_encode()
1941 req->rq_snd_buf.head[0].iov_base, req); in rpc_xdr_encode()
1942 if (rpc_encode_header(task, &xdr)) in rpc_xdr_encode()
1945 task->tk_status = rpcauth_wrap_req(task, &xdr); in rpc_xdr_encode()
1949 * 3. Encode arguments of an RPC call
1954 if (!rpc_task_need_encode(task)) in call_encode()
1962 if (task->tk_status == 0 && rpc_reply_expected(task)) in call_encode()
1963 task->tk_status = xprt_request_enqueue_receive(task); in call_encode()
1965 if (task->tk_status != 0) { in call_encode()
1967 switch (task->tk_status) { in call_encode()
1968 case -EAGAIN: in call_encode()
1969 case -ENOMEM: in call_encode()
1972 case -EKEYEXPIRED: in call_encode()
1973 if (!task->tk_cred_retry) { in call_encode()
1974 rpc_call_rpcerror(task, task->tk_status); in call_encode()
1976 task->tk_action = call_refresh; in call_encode()
1977 task->tk_cred_retry--; in call_encode()
1982 rpc_call_rpcerror(task, task->tk_status); in call_encode()
1989 task->tk_action = call_transmit; in call_encode()
1991 if (!xprt_bound(task->tk_xprt)) in call_encode()
1992 task->tk_action = call_bind; in call_encode()
1993 else if (!xprt_connected(task->tk_xprt)) in call_encode()
1994 task->tk_action = call_connect; in call_encode()
1998 * Helpers to check if the task was already transmitted, and
2004 return !test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate); in rpc_task_transmitted()
2011 task->tk_action = call_transmit_status; in rpc_task_handle_transmitted()
2015 * 4. Get the server port number if not yet set
2020 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_bind()
2022 if (rpc_task_transmitted(task)) { in call_bind()
2027 if (xprt_bound(xprt)) { in call_bind()
2028 task->tk_action = call_connect; in call_bind()
2032 task->tk_action = call_bind_status; in call_bind()
2033 if (!xprt_prepare_transmit(task)) in call_bind()
2036 xprt->ops->rpcbind(task); in call_bind()
2045 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_bind_status()
2046 int status = -EIO; in call_bind_status()
2048 if (rpc_task_transmitted(task)) { in call_bind_status()
2053 if (task->tk_status >= 0) in call_bind_status()
2055 if (xprt_bound(xprt)) { in call_bind_status()
2056 task->tk_status = 0; in call_bind_status()
2060 switch (task->tk_status) { in call_bind_status()
2061 case -ENOMEM: in call_bind_status()
2064 case -EACCES: in call_bind_status()
2066 /* fail immediately if this is an RPC ping */ in call_bind_status()
2067 if (task->tk_msg.rpc_proc->p_proc == 0) { in call_bind_status()
2068 status = -EOPNOTSUPP; in call_bind_status()
2073 case -ENOBUFS: in call_bind_status()
2076 case -EAGAIN: in call_bind_status()
2078 case -ETIMEDOUT: in call_bind_status()
2081 case -EPFNOSUPPORT: in call_bind_status()
2085 case -EPROTONOSUPPORT: in call_bind_status()
2088 case -ECONNREFUSED: /* connection problems */ in call_bind_status()
2089 case -ECONNRESET: in call_bind_status()
2090 case -ECONNABORTED: in call_bind_status()
2091 case -ENOTCONN: in call_bind_status()
2092 case -EHOSTDOWN: in call_bind_status()
2093 case -ENETDOWN: in call_bind_status()
2094 case -EHOSTUNREACH: in call_bind_status()
2095 case -ENETUNREACH: in call_bind_status()
2096 case -EPIPE: in call_bind_status()
2098 if (!RPC_IS_SOFTCONN(task)) { in call_bind_status()
2102 status = task->tk_status; in call_bind_status()
2111 task->tk_action = call_connect; in call_bind_status()
2114 task->tk_status = 0; in call_bind_status()
2115 task->tk_action = call_bind; in call_bind_status()
2120 * 4b. Connect to the RPC server
2125 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_connect()
2127 if (rpc_task_transmitted(task)) { in call_connect()
2132 if (xprt_connected(xprt)) { in call_connect()
2133 task->tk_action = call_transmit; in call_connect()
2137 task->tk_action = call_connect_status; in call_connect()
2138 if (task->tk_status < 0) in call_connect()
2140 if (task->tk_flags & RPC_TASK_NOCONNECT) { in call_connect()
2141 rpc_call_rpcerror(task, -ENOTCONN); in call_connect()
2144 if (!xprt_prepare_transmit(task)) in call_connect()
2155 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_connect_status()
2156 struct rpc_clnt *clnt = task->tk_client; in call_connect_status()
2157 int status = task->tk_status; in call_connect_status()
2159 if (rpc_task_transmitted(task)) { in call_connect_status()
2166 if (task->tk_status == 0) { in call_connect_status()
2167 clnt->cl_stats->netreconn++; in call_connect_status()
2170 if (xprt_connected(xprt)) { in call_connect_status()
2171 task->tk_status = 0; in call_connect_status()
2175 task->tk_status = 0; in call_connect_status()
2177 case -ECONNREFUSED: in call_connect_status()
2178 case -ECONNRESET: in call_connect_status()
2180 if (RPC_IS_SOFTCONN(task)) in call_connect_status()
2182 if (clnt->cl_autobind) { in call_connect_status()
2187 case -ECONNABORTED: in call_connect_status()
2188 case -ENETDOWN: in call_connect_status()
2189 case -ENETUNREACH: in call_connect_status()
2190 case -EHOSTUNREACH: in call_connect_status()
2191 case -EPIPE: in call_connect_status()
2192 case -EPROTO: in call_connect_status()
2193 xprt_conditional_disconnect(task->tk_rqstp->rq_xprt, in call_connect_status()
2194 task->tk_rqstp->rq_connect_cookie); in call_connect_status()
2195 if (RPC_IS_SOFTCONN(task)) in call_connect_status()
2200 case -EADDRINUSE: in call_connect_status()
2201 case -ENOTCONN: in call_connect_status()
2202 case -EAGAIN: in call_connect_status()
2203 case -ETIMEDOUT: in call_connect_status()
2204 if (!(task->tk_flags & RPC_TASK_NO_ROUND_ROBIN) && in call_connect_status()
2205 (task->tk_flags & RPC_TASK_MOVEABLE) && in call_connect_status()
2206 test_bit(XPRT_REMOVE, &xprt->state)) { in call_connect_status()
2207 struct rpc_xprt *saved = task->tk_xprt; in call_connect_status()
2211 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in call_connect_status()
2213 if (xps->xps_nxprts > 1) { in call_connect_status()
2217 value = atomic_long_dec_return(&xprt->queuelen); in call_connect_status()
2218 if (value == 0) in call_connect_status()
2222 task->tk_xprt = NULL; in call_connect_status()
2223 task->tk_action = call_start; in call_connect_status()
2226 if (!task->tk_xprt) in call_connect_status()
2230 case -ENOBUFS: in call_connect_status()
2237 task->tk_action = call_transmit; in call_connect_status()
2241 task->tk_action = call_bind; in call_connect_status()
2246 * 5. Transmit the RPC request, and wait for reply
2251 if (rpc_task_transmitted(task)) { in call_transmit()
2256 task->tk_action = call_transmit_status; in call_transmit()
2257 if (!xprt_prepare_transmit(task)) in call_transmit()
2259 task->tk_status = 0; in call_transmit()
2260 if (test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) { in call_transmit()
2261 if (!xprt_connected(task->tk_xprt)) { in call_transmit()
2262 task->tk_status = -ENOTCONN; in call_transmit()
2276 task->tk_action = call_status; in call_transmit_status()
2282 if (rpc_task_transmitted(task)) { in call_transmit_status()
2283 task->tk_status = 0; in call_transmit_status()
2288 switch (task->tk_status) { in call_transmit_status()
2291 case -EBADMSG: in call_transmit_status()
2292 task->tk_status = 0; in call_transmit_status()
2293 task->tk_action = call_encode; in call_transmit_status()
2296 * Special cases: if we've been waiting on the in call_transmit_status()
2297 * socket's write_space() callback, or if the in call_transmit_status()
2301 case -ENOMEM: in call_transmit_status()
2302 case -ENOBUFS: in call_transmit_status()
2305 case -EBADSLT: in call_transmit_status()
2306 case -EAGAIN: in call_transmit_status()
2307 task->tk_action = call_transmit; in call_transmit_status()
2308 task->tk_status = 0; in call_transmit_status()
2310 case -EHOSTDOWN: in call_transmit_status()
2311 case -ENETDOWN: in call_transmit_status()
2312 case -EHOSTUNREACH: in call_transmit_status()
2313 case -ENETUNREACH: in call_transmit_status()
2314 case -EPERM: in call_transmit_status()
2316 case -ECONNREFUSED: in call_transmit_status()
2317 if (RPC_IS_SOFTCONN(task)) { in call_transmit_status()
2318 if (!task->tk_msg.rpc_proc->p_proc) in call_transmit_status()
2319 trace_xprt_ping(task->tk_xprt, in call_transmit_status()
2320 task->tk_status); in call_transmit_status()
2321 rpc_call_rpcerror(task, task->tk_status); in call_transmit_status()
2325 case -ECONNRESET: in call_transmit_status()
2326 case -ECONNABORTED: in call_transmit_status()
2327 case -EADDRINUSE: in call_transmit_status()
2328 case -ENOTCONN: in call_transmit_status()
2329 case -EPIPE: in call_transmit_status()
2330 task->tk_action = call_bind; in call_transmit_status()
2331 task->tk_status = 0; in call_transmit_status()
2337 #if defined(CONFIG_SUNRPC_BACKCHANNEL)
2345 task->tk_action = call_bc_transmit; in call_bc_encode()
2349 * 5b. Send the backchannel RPC reply. On error, drop the reply. In
2355 task->tk_action = call_bc_transmit_status; in call_bc_transmit()
2356 if (test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) { in call_bc_transmit()
2357 if (!xprt_prepare_transmit(task)) in call_bc_transmit()
2359 task->tk_status = 0; in call_bc_transmit()
2368 struct rpc_rqst *req = task->tk_rqstp; in call_bc_transmit_status()
2370 if (rpc_task_transmitted(task)) in call_bc_transmit_status()
2371 task->tk_status = 0; in call_bc_transmit_status()
2373 switch (task->tk_status) { in call_bc_transmit_status()
2376 case -ENETDOWN: in call_bc_transmit_status()
2377 case -EHOSTDOWN: in call_bc_transmit_status()
2378 case -EHOSTUNREACH: in call_bc_transmit_status()
2379 case -ENETUNREACH: in call_bc_transmit_status()
2380 case -ECONNRESET: in call_bc_transmit_status()
2381 case -ECONNREFUSED: in call_bc_transmit_status()
2382 case -EADDRINUSE: in call_bc_transmit_status()
2383 case -ENOTCONN: in call_bc_transmit_status()
2384 case -EPIPE: in call_bc_transmit_status()
2386 case -ENOMEM: in call_bc_transmit_status()
2387 case -ENOBUFS: in call_bc_transmit_status()
2390 case -EBADSLT: in call_bc_transmit_status()
2391 case -EAGAIN: in call_bc_transmit_status()
2392 task->tk_status = 0; in call_bc_transmit_status()
2393 task->tk_action = call_bc_transmit; in call_bc_transmit_status()
2395 case -ETIMEDOUT: in call_bc_transmit_status()
2403 printk(KERN_NOTICE "RPC: Could not send backchannel reply " in call_bc_transmit_status()
2404 "error: %d\n", task->tk_status); in call_bc_transmit_status()
2405 xprt_conditional_disconnect(req->rq_xprt, in call_bc_transmit_status()
2406 req->rq_connect_cookie); in call_bc_transmit_status()
2413 printk(KERN_NOTICE "RPC: Could not send backchannel reply " in call_bc_transmit_status()
2414 "error: %d\n", task->tk_status); in call_bc_transmit_status()
2417 task->tk_action = rpc_exit_task; in call_bc_transmit_status()
2422 * 6. Sort out the RPC call status
2427 struct rpc_clnt *clnt = task->tk_client; in call_status()
2430 if (!task->tk_msg.rpc_proc->p_proc) in call_status()
2431 trace_xprt_ping(task->tk_xprt, task->tk_status); in call_status()
2433 status = task->tk_status; in call_status()
2434 if (status >= 0) { in call_status()
2435 task->tk_action = call_decode; in call_status()
2440 task->tk_status = 0; in call_status()
2442 case -EHOSTDOWN: in call_status()
2443 case -ENETDOWN: in call_status()
2444 case -EHOSTUNREACH: in call_status()
2445 case -ENETUNREACH: in call_status()
2446 case -EPERM: in call_status()
2447 if (RPC_IS_SOFTCONN(task)) in call_status()
2450 * Delay any retries for 3 seconds, then handle as if it in call_status()
2455 case -ETIMEDOUT: in call_status()
2457 case -ECONNREFUSED: in call_status()
2458 case -ECONNRESET: in call_status()
2459 case -ECONNABORTED: in call_status()
2460 case -ENOTCONN: in call_status()
2463 case -EADDRINUSE: in call_status()
2466 case -EPIPE: in call_status()
2467 case -EAGAIN: in call_status()
2469 case -ENFILE: in call_status()
2470 case -ENOBUFS: in call_status()
2471 case -ENOMEM: in call_status()
2474 case -EIO: in call_status()
2478 if (clnt->cl_chatty) in call_status()
2479 printk("%s: RPC call returned error %d\n", in call_status()
2480 clnt->cl_program->name, -status); in call_status()
2483 task->tk_action = call_encode; in call_status()
2494 if (!req || !req->rq_xprt) in rpc_check_connected()
2496 return xprt_connected(req->rq_xprt); in rpc_check_connected()
2502 struct rpc_clnt *clnt = task->tk_client; in rpc_check_timeout()
2504 if (RPC_SIGNALLED(task)) in rpc_check_timeout()
2507 if (xprt_adjust_timeout(task->tk_rqstp) == 0) in rpc_check_timeout()
2511 task->tk_timeouts++; in rpc_check_timeout()
2513 if (RPC_IS_SOFTCONN(task) && !rpc_check_connected(task->tk_rqstp)) { in rpc_check_timeout()
2514 rpc_call_rpcerror(task, -ETIMEDOUT); in rpc_check_timeout()
2518 if (RPC_IS_SOFT(task)) { in rpc_check_timeout()
2521 * been sent, it should time out only if the transport in rpc_check_timeout()
2524 if ((task->tk_flags & RPC_TASK_NO_RETRANS_TIMEOUT) && in rpc_check_timeout()
2525 rpc_check_connected(task->tk_rqstp)) in rpc_check_timeout()
2528 if (clnt->cl_chatty) { in rpc_check_timeout()
2531 clnt->cl_program->name, in rpc_check_timeout()
2532 task->tk_xprt->servername); in rpc_check_timeout()
2534 if (task->tk_flags & RPC_TASK_TIMEOUT) in rpc_check_timeout()
2535 rpc_call_rpcerror(task, -ETIMEDOUT); in rpc_check_timeout()
2537 __rpc_call_rpcerror(task, -EIO, -ETIMEDOUT); in rpc_check_timeout()
2541 if (!(task->tk_flags & RPC_CALL_MAJORSEEN)) { in rpc_check_timeout()
2542 task->tk_flags |= RPC_CALL_MAJORSEEN; in rpc_check_timeout()
2543 if (clnt->cl_chatty) { in rpc_check_timeout()
2546 clnt->cl_program->name, in rpc_check_timeout()
2547 task->tk_xprt->servername); in rpc_check_timeout()
2552 * Did our request time out due to an RPCSEC_GSS out-of-sequence in rpc_check_timeout()
2559 * 7. Decode the RPC reply
2564 struct rpc_clnt *clnt = task->tk_client; in call_decode()
2565 struct rpc_rqst *req = task->tk_rqstp; in call_decode()
2569 if (!task->tk_msg.rpc_proc->p_decode) { in call_decode()
2570 task->tk_action = rpc_exit_task; in call_decode()
2574 if (task->tk_flags & RPC_CALL_MAJORSEEN) { in call_decode()
2575 if (clnt->cl_chatty) { in call_decode()
2577 clnt->cl_program->name, in call_decode()
2578 task->tk_xprt->servername); in call_decode()
2580 task->tk_flags &= ~RPC_CALL_MAJORSEEN; in call_decode()
2584 * Did we ever call xprt_complete_rqst()? If not, we should assume in call_decode()
2587 err = -EAGAIN; in call_decode()
2588 if (!req->rq_reply_bytes_recvd) in call_decode()
2592 * before it changed req->rq_reply_bytes_recvd. in call_decode()
2596 req->rq_rcv_buf.len = req->rq_private_buf.len; in call_decode()
2597 trace_rpc_xdr_recvfrom(task, &req->rq_rcv_buf); in call_decode()
2600 WARN_ON(memcmp(&req->rq_rcv_buf, &req->rq_private_buf, in call_decode()
2601 sizeof(req->rq_rcv_buf)) != 0); in call_decode()
2603 xdr_init_decode(&xdr, &req->rq_rcv_buf, in call_decode()
2604 req->rq_rcv_buf.head[0].iov_base, req); in call_decode()
2609 task->tk_action = rpc_exit_task; in call_decode()
2610 task->tk_status = rpcauth_unwrap_resp(task, &xdr); in call_decode()
2613 case -EAGAIN: in call_decode()
2614 task->tk_status = 0; in call_decode()
2615 if (task->tk_client->cl_discrtry) in call_decode()
2616 xprt_conditional_disconnect(req->rq_xprt, in call_decode()
2617 req->rq_connect_cookie); in call_decode()
2618 task->tk_action = call_encode; in call_decode()
2621 case -EKEYREJECTED: in call_decode()
2622 task->tk_action = call_reserve; in call_decode()
2625 /* Ensure we obtain a new XID if we retry! */ in call_decode()
2633 struct rpc_clnt *clnt = task->tk_client; in rpc_encode_header()
2634 struct rpc_rqst *req = task->tk_rqstp; in rpc_encode_header()
2638 error = -EMSGSIZE; in rpc_encode_header()
2640 if (!p) in rpc_encode_header()
2642 *p++ = req->rq_xid; in rpc_encode_header()
2645 *p++ = cpu_to_be32(clnt->cl_prog); in rpc_encode_header()
2646 *p++ = cpu_to_be32(clnt->cl_vers); in rpc_encode_header()
2647 *p = cpu_to_be32(task->tk_msg.rpc_proc->p_proc); in rpc_encode_header()
2650 if (error < 0) in rpc_encode_header()
2662 struct rpc_clnt *clnt = task->tk_client; in rpc_decode_header()
2666 /* RFC-1014 says that the representation of XDR data must be a in rpc_decode_header()
2668 * - if it isn't pointer subtraction in the NFS client may give in rpc_decode_header()
2671 if (task->tk_rqstp->rq_rcv_buf.len & 3) in rpc_decode_header()
2675 if (!p) in rpc_decode_header()
2678 if (*p++ != rpc_reply) in rpc_decode_header()
2680 if (*p++ != rpc_msg_accepted) in rpc_decode_header()
2684 if (error) in rpc_decode_header()
2688 if (!p) in rpc_decode_header()
2695 error = -EPFNOSUPPORT; in rpc_decode_header()
2699 error = -EPROTONOSUPPORT; in rpc_decode_header()
2703 error = -EOPNOTSUPP; in rpc_decode_header()
2708 error = -EIO; in rpc_decode_header()
2715 clnt->cl_stats->rpcgarbage++; in rpc_decode_header()
2716 if (task->tk_garb_retry) { in rpc_decode_header()
2717 task->tk_garb_retry--; in rpc_decode_header()
2718 task->tk_action = call_encode; in rpc_decode_header()
2719 return -EAGAIN; in rpc_decode_header()
2727 error = -EIO; in rpc_decode_header()
2733 case -EPROTONOSUPPORT: in rpc_decode_header()
2735 case -EACCES: in rpc_decode_header()
2736 /* possible RPCSEC_GSS out-of-sequence event (RFC2203), in rpc_decode_header()
2739 task->tk_rqstp->rq_reply_bytes_recvd = 0; in rpc_decode_header()
2740 task->tk_status = xprt_request_enqueue_receive(task); in rpc_decode_header()
2741 task->tk_action = call_transmit_status; in rpc_decode_header()
2742 return -EBADMSG; in rpc_decode_header()
2748 error = -EACCES; in rpc_decode_header()
2750 if (!p) in rpc_decode_header()
2757 error = -EPROTONOSUPPORT; in rpc_decode_header()
2764 if (!p) in rpc_decode_header()
2772 if (!task->tk_cred_retry) in rpc_decode_header()
2774 task->tk_cred_retry--; in rpc_decode_header()
2776 return -EKEYREJECTED; in rpc_decode_header()
2780 if (!task->tk_garb_retry) in rpc_decode_header()
2782 task->tk_garb_retry--; in rpc_decode_header()
2784 task->tk_action = call_encode; in rpc_decode_header()
2785 return -EAGAIN; in rpc_decode_header()
2788 pr_warn("RPC: server %s requires stronger authentication.\n", in rpc_decode_header()
2789 task->tk_xprt->servername); in rpc_decode_header()
2820 task->tk_flags &= ~RPC_TASK_NO_RETRANS_TIMEOUT; in rpc_null_call_prepare()
2862 if (clnt->cl_auth->au_ops->ping) in rpc_ping()
2863 return clnt->cl_auth->au_ops->ping(clnt); in rpc_ping()
2866 if (IS_ERR(task)) in rpc_ping()
2868 status = task->tk_status; in rpc_ping()
2888 if (IS_ERR(task)) in rpc_ping_noreply()
2890 status = task->tk_status; in rpc_ping_noreply()
2904 if (task->tk_status == 0) in rpc_cb_add_xprt_done()
2905 rpc_xprt_switch_add_xprt(data->xps, data->xprt); in rpc_cb_add_xprt_done()
2912 xprt_put(data->xprt); in rpc_cb_add_xprt_release()
2913 xprt_switch_put(data->xps); in rpc_cb_add_xprt_release()
2924 * rpc_clnt_test_and_add_xprt - Test and add a new transport to a rpc_clnt
2936 int max_connect = clnt->cl_max_connect; in rpc_clnt_test_and_add_xprt()
2938 if (in_max_connect) in rpc_clnt_test_and_add_xprt()
2940 if (xps->xps_nunique_destaddr_xprts + 1 > max_connect) { in rpc_clnt_test_and_add_xprt()
2946 return -EINVAL; in rpc_clnt_test_and_add_xprt()
2950 if (!data) in rpc_clnt_test_and_add_xprt()
2951 return -ENOMEM; in rpc_clnt_test_and_add_xprt()
2952 data->xps = xprt_switch_get(xps); in rpc_clnt_test_and_add_xprt()
2953 data->xprt = xprt_get(xprt); in rpc_clnt_test_and_add_xprt()
2954 if (rpc_xprt_switch_has_addr(data->xps, (struct sockaddr *)&xprt->addr)) { in rpc_clnt_test_and_add_xprt()
2961 if (IS_ERR(task)) in rpc_clnt_test_and_add_xprt()
2964 data->xps->xps_nunique_destaddr_xprts++; in rpc_clnt_test_and_add_xprt()
2976 int status = -EADDRINUSE; in rpc_clnt_add_xprt_helper()
2980 if (IS_ERR(task)) in rpc_clnt_add_xprt_helper()
2983 status = task->tk_status; in rpc_clnt_add_xprt_helper()
2986 if (status < 0) in rpc_clnt_add_xprt_helper()
2990 data->add_xprt_test(clnt, xprt, data->data); in rpc_clnt_add_xprt_helper()
3018 int status = -EADDRINUSE; in rpc_clnt_setup_test_and_add_xprt()
3023 if (rpc_xprt_switch_has_addr(xps, (struct sockaddr *)&xprt->addr)) in rpc_clnt_setup_test_and_add_xprt()
3027 if (status < 0) in rpc_clnt_setup_test_and_add_xprt()
3034 if (status < 0) in rpc_clnt_setup_test_and_add_xprt()
3035 pr_info("RPC: rpc_clnt_test_xprt failed: %d addr %s not " in rpc_clnt_setup_test_and_add_xprt()
3037 xprt->address_strings[RPC_DISPLAY_ADDR]); in rpc_clnt_setup_test_and_add_xprt()
3044 * rpc_clnt_add_xprt - Add a new transport to a rpc_clnt
3052 * If ping is set, then test that connectivity succeeds before
3072 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in rpc_clnt_add_xprt()
3073 xprt = xprt_iter_xprt(&clnt->cl_xpi); in rpc_clnt_add_xprt()
3074 if (xps == NULL || xprt == NULL) { in rpc_clnt_add_xprt()
3077 return -EAGAIN; in rpc_clnt_add_xprt()
3079 resvport = xprt->resvport; in rpc_clnt_add_xprt()
3080 reuseport = xprt->reuseport; in rpc_clnt_add_xprt()
3081 connect_timeout = xprt->connect_timeout; in rpc_clnt_add_xprt()
3082 reconnect_timeout = xprt->max_reconnect_timeout; in rpc_clnt_add_xprt()
3083 ident = xprt->xprt_class->ident; in rpc_clnt_add_xprt()
3086 if (!xprtargs->ident) in rpc_clnt_add_xprt()
3087 xprtargs->ident = ident; in rpc_clnt_add_xprt()
3088 xprtargs->xprtsec = clnt->cl_xprtsec; in rpc_clnt_add_xprt()
3090 if (IS_ERR(xprt)) { in rpc_clnt_add_xprt()
3094 xprt->resvport = resvport; in rpc_clnt_add_xprt()
3095 xprt->reuseport = reuseport; in rpc_clnt_add_xprt()
3097 if (xprtargs->connect_timeout) in rpc_clnt_add_xprt()
3098 connect_timeout = xprtargs->connect_timeout; in rpc_clnt_add_xprt()
3099 if (xprtargs->reconnect_timeout) in rpc_clnt_add_xprt()
3100 reconnect_timeout = xprtargs->reconnect_timeout; in rpc_clnt_add_xprt()
3101 if (xprt->ops->set_connect_timeout != NULL) in rpc_clnt_add_xprt()
3102 xprt->ops->set_connect_timeout(xprt, in rpc_clnt_add_xprt()
3107 if (setup) { in rpc_clnt_add_xprt()
3109 if (ret != 0) in rpc_clnt_add_xprt()
3132 main_xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); in rpc_xprt_probe_trunked()
3133 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in rpc_xprt_probe_trunked()
3134 status = rpc_cmp_addr_port((struct sockaddr *)&xprt->addr, in rpc_xprt_probe_trunked()
3135 (struct sockaddr *)&main_xprt->addr); in rpc_xprt_probe_trunked()
3138 if (status || !test_bit(XPRT_OFFLINE, &xprt->state)) in rpc_xprt_probe_trunked()
3148 /* rpc_clnt_probe_trunked_xprt -- probe offlined transport for session trunking
3152 * the function rpc_xprt_probe_trunked() which will determine if this
3162 if (ret) in rpc_clnt_probe_trunked_xprts()
3167 if (!xprt) in rpc_clnt_probe_trunked_xprts()
3171 if (ret < 0) in rpc_clnt_probe_trunked_xprts()
3190 main_xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); in rpc_xprt_offline()
3191 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in rpc_xprt_offline()
3192 err = rpc_cmp_addr_port((struct sockaddr *)&xprt->addr, in rpc_xprt_offline()
3193 (struct sockaddr *)&main_xprt->addr); in rpc_xprt_offline()
3196 if (err) in rpc_xprt_offline()
3199 if (wait_on_bit_lock(&xprt->state, XPRT_LOCKED, TASK_KILLABLE)) { in rpc_xprt_offline()
3200 err = -EINTR; in rpc_xprt_offline()
3212 /* rpc_clnt_manage_trunked_xprts -- offline trunked transports
3237 if (xprt->ops->set_connect_timeout) in rpc_xprt_set_connect_timeout()
3238 xprt->ops->set_connect_timeout(xprt, in rpc_xprt_set_connect_timeout()
3239 timeo->connect_timeout, in rpc_xprt_set_connect_timeout()
3240 timeo->reconnect_timeout); in rpc_xprt_set_connect_timeout()
3262 xprt_switch_put(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in rpc_clnt_xprt_switch_put()
3272 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_clnt_xprt_set_online()
3279 if (rpc_clnt_xprt_switch_has_addr(clnt, in rpc_clnt_xprt_switch_add_xprt()
3280 (const struct sockaddr *)&xprt->addr)) { in rpc_clnt_xprt_switch_add_xprt()
3284 rpc_xprt_switch_add_xprt(rcu_dereference(clnt->cl_xpi.xpi_xpswitch), in rpc_clnt_xprt_switch_add_xprt()
3295 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_clnt_xprt_switch_remove_xprt()
3296 rpc_xprt_switch_remove_xprt(rcu_dereference(clnt->cl_xpi.xpi_xpswitch), in rpc_clnt_xprt_switch_remove_xprt()
3298 xps->xps_nunique_destaddr_xprts--; in rpc_clnt_xprt_switch_remove_xprt()
3310 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_clnt_xprt_switch_has_addr()
3317 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
3320 printk(KERN_INFO "-pid- flgs status -client- --rqstp- " in rpc_show_header()
3321 "-timeout ---ops--\n"); in rpc_show_header()
3329 if (RPC_IS_QUEUED(task)) in rpc_show_task()
3330 rpc_waitq = rpc_qname(task->tk_waitqueue); in rpc_show_task()
3333 task->tk_pid, task->tk_flags, task->tk_status, in rpc_show_task()
3334 clnt, task->tk_rqstp, rpc_task_timeout(task), task->tk_ops, in rpc_show_task()
3335 clnt->cl_program->name, clnt->cl_vers, rpc_proc_name(task), in rpc_show_task()
3336 task->tk_action, rpc_waitq); in rpc_show_task()
3346 spin_lock(&sn->rpc_client_lock); in rpc_show_tasks()
3347 list_for_each_entry(clnt, &sn->all_clients, cl_clients) { in rpc_show_tasks()
3348 spin_lock(&clnt->cl_lock); in rpc_show_tasks()
3349 list_for_each_entry(task, &clnt->cl_tasks, tk_task) { in rpc_show_tasks()
3350 if (!header) { in rpc_show_tasks()
3356 spin_unlock(&clnt->cl_lock); in rpc_show_tasks()
3358 spin_unlock(&sn->rpc_client_lock); in rpc_show_tasks()
3362 #if IS_ENABLED(CONFIG_SUNRPC_SWAP)
3374 while (clnt != clnt->cl_parent) in rpc_clnt_swap_activate()
3375 clnt = clnt->cl_parent; in rpc_clnt_swap_activate()
3376 if (atomic_inc_return(&clnt->cl_swapper) == 1) in rpc_clnt_swap_activate()
3395 while (clnt != clnt->cl_parent) in rpc_clnt_swap_deactivate()
3396 clnt = clnt->cl_parent; in rpc_clnt_swap_deactivate()
3397 if (atomic_dec_if_positive(&clnt->cl_swapper) == 0) in rpc_clnt_swap_deactivate()