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 if (!xprt_bound(xprt)) in rpc_clnt_set_transport()
279 clnt->cl_autobind = 1; in rpc_clnt_set_transport()
281 clnt->cl_timeout = timeout; in rpc_clnt_set_transport()
282 rcu_assign_pointer(clnt->cl_xprt, xprt); in rpc_clnt_set_transport()
283 spin_unlock(&clnt->cl_lock); in rpc_clnt_set_transport()
290 clnt->cl_nodelen = strlcpy(clnt->cl_nodename, in rpc_clnt_set_nodename()
291 nodename, sizeof(clnt->cl_nodename)); in rpc_clnt_set_nodename()
310 if (pipefs_sb) { in rpc_client_register()
312 if (err) in rpc_client_register()
317 if (pipefs_sb) in rpc_client_register()
321 if (IS_ERR(auth)) { in rpc_client_register()
322 dprintk("RPC: Couldn't create auth handle (flavor %u)\n", in rpc_client_register()
333 if (pipefs_sb) in rpc_client_register()
352 if (clid < 0) in rpc_alloc_clid()
354 clnt->cl_clid = clid; in rpc_alloc_clid()
360 ida_free(&rpc_clids, clnt->cl_clid); in rpc_free_clid()
368 const struct rpc_program *program = args->program; in rpc_new_client()
372 const char *nodename = args->nodename; in rpc_new_client()
376 if (err) in rpc_new_client()
379 err = -EINVAL; in rpc_new_client()
380 if (args->version >= program->nrvers) in rpc_new_client()
382 version = program->version[args->version]; in rpc_new_client()
383 if (version == NULL) in rpc_new_client()
386 err = -ENOMEM; in rpc_new_client()
388 if (!clnt) in rpc_new_client()
390 clnt->cl_parent = parent ? : clnt; in rpc_new_client()
391 clnt->cl_xprtsec = args->xprtsec; in rpc_new_client()
394 if (err) in rpc_new_client()
397 clnt->cl_cred = get_cred(args->cred); in rpc_new_client()
398 clnt->cl_procinfo = version->procs; in rpc_new_client()
399 clnt->cl_maxproc = version->nrprocs; in rpc_new_client()
400 clnt->cl_prog = args->prognumber ? : program->number; in rpc_new_client()
401 clnt->cl_vers = version->number; in rpc_new_client()
402 clnt->cl_stats = args->stats ? : program->stats; in rpc_new_client()
403 clnt->cl_metrics = rpc_alloc_iostats(clnt); in rpc_new_client()
404 rpc_init_pipe_dir_head(&clnt->cl_pipedir_objects); in rpc_new_client()
405 err = -ENOMEM; in rpc_new_client()
406 if (clnt->cl_metrics == NULL) in rpc_new_client()
408 clnt->cl_program = program; in rpc_new_client()
409 INIT_LIST_HEAD(&clnt->cl_tasks); in rpc_new_client()
410 spin_lock_init(&clnt->cl_lock); in rpc_new_client()
412 timeout = xprt->timeout; in rpc_new_client()
413 if (args->timeout != NULL) { in rpc_new_client()
414 memcpy(&clnt->cl_timeout_default, args->timeout, in rpc_new_client()
415 sizeof(clnt->cl_timeout_default)); in rpc_new_client()
416 timeout = &clnt->cl_timeout_default; in rpc_new_client()
420 xprt->main = true; in rpc_new_client()
421 xprt_iter_init(&clnt->cl_xpi, xps); in rpc_new_client()
424 clnt->cl_rtt = &clnt->cl_rtt_default; in rpc_new_client()
425 rpc_init_rtt(&clnt->cl_rtt_default, clnt->cl_timeout->to_initval); in rpc_new_client()
427 refcount_set(&clnt->cl_count, 1); in rpc_new_client()
429 if (nodename == NULL) in rpc_new_client()
430 nodename = utsname()->nodename; in rpc_new_client()
435 err = rpc_client_register(clnt, args->authflavor, args->client_name); in rpc_new_client()
436 if (err) in rpc_new_client()
438 if (parent) in rpc_new_client()
439 refcount_inc(&parent->cl_count); in rpc_new_client()
445 rpc_free_iostats(clnt->cl_metrics); in rpc_new_client()
447 put_cred(clnt->cl_cred); in rpc_new_client()
456 trace_rpc_clnt_new_err(program->name, args->servername, err); in rpc_new_client()
466 if (args->bc_xprt && args->bc_xprt->xpt_bc_xps) { in rpc_create_xprt()
467 WARN_ON_ONCE(!(args->protocol & XPRT_TRANSPORT_BC)); in rpc_create_xprt()
468 xps = args->bc_xprt->xpt_bc_xps; in rpc_create_xprt()
472 if (xps == NULL) { in rpc_create_xprt()
474 return ERR_PTR(-ENOMEM); in rpc_create_xprt()
476 if (xprt->bc_xprt) { in rpc_create_xprt()
478 xprt->bc_xprt->xpt_bc_xps = xps; in rpc_create_xprt()
482 if (IS_ERR(clnt)) in rpc_create_xprt()
485 if (!(args->flags & RPC_CLNT_CREATE_NOPING)) { in rpc_create_xprt()
487 if (err != 0) { in rpc_create_xprt()
491 } else if (args->flags & RPC_CLNT_CREATE_CONNECTED) { in rpc_create_xprt()
493 if (err != 0) { in rpc_create_xprt()
499 clnt->cl_softrtry = 1; in rpc_create_xprt()
500 if (args->flags & (RPC_CLNT_CREATE_HARDRTRY|RPC_CLNT_CREATE_SOFTERR)) { in rpc_create_xprt()
501 clnt->cl_softrtry = 0; in rpc_create_xprt()
502 if (args->flags & RPC_CLNT_CREATE_SOFTERR) in rpc_create_xprt()
503 clnt->cl_softerr = 1; in rpc_create_xprt()
506 if (args->flags & RPC_CLNT_CREATE_AUTOBIND) in rpc_create_xprt()
507 clnt->cl_autobind = 1; in rpc_create_xprt()
508 if (args->flags & RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT) in rpc_create_xprt()
509 clnt->cl_noretranstimeo = 1; in rpc_create_xprt()
510 if (args->flags & RPC_CLNT_CREATE_DISCRTRY) in rpc_create_xprt()
511 clnt->cl_discrtry = 1; in rpc_create_xprt()
512 if (!(args->flags & RPC_CLNT_CREATE_QUIET)) in rpc_create_xprt()
513 clnt->cl_chatty = 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_principal = clnt->cl_principal; in __rpc_clone_client()
665 new->cl_max_connect = clnt->cl_max_connect; in __rpc_clone_client()
674 * rpc_clone_client - Clone an RPC client structure
676 * @clnt: RPC client whose parameters are copied
678 * Returns a fresh RPC client or an ERR_PTR.
683 .program = clnt->cl_program, in rpc_clone_client()
684 .prognumber = clnt->cl_prog, in rpc_clone_client()
685 .version = clnt->cl_vers, in rpc_clone_client()
686 .authflavor = clnt->cl_auth->au_flavor, in rpc_clone_client()
687 .cred = clnt->cl_cred, in rpc_clone_client()
688 .stats = clnt->cl_stats, in rpc_clone_client()
695 * rpc_clone_client_set_auth - Clone an RPC client structure and set its auth
697 * @clnt: RPC client whose parameters are copied
700 * Returns a fresh RPC client or an ERR_PTR.
706 .program = clnt->cl_program, in rpc_clone_client_set_auth()
707 .prognumber = clnt->cl_prog, in rpc_clone_client_set_auth()
708 .version = clnt->cl_vers, in rpc_clone_client_set_auth()
710 .cred = clnt->cl_cred, in rpc_clone_client_set_auth()
711 .stats = clnt->cl_stats, in rpc_clone_client_set_auth()
718 * rpc_switch_client_transport: switch the RPC transport on the fly
723 * This function allows the caller to switch the RPC transport for the
726 * there are no active RPC tasks by using some form of locking.
728 * Returns zero if "clnt" is now using the new xprt. Otherwise a
743 args->xprtsec = clnt->cl_xprtsec; in rpc_switch_client_transport()
745 if (IS_ERR(xprt)) in rpc_switch_client_transport()
749 if (xps == NULL) { in rpc_switch_client_transport()
751 return -ENOMEM; in rpc_switch_client_transport()
754 pseudoflavor = clnt->cl_auth->au_flavor; in rpc_switch_client_transport()
756 old_timeo = clnt->cl_timeout; in rpc_switch_client_transport()
758 oldxps = xprt_iter_xchg_switch(&clnt->cl_xpi, xps); in rpc_switch_client_transport()
768 * children, if it has any, still point to the old xprt. in rpc_switch_client_transport()
770 parent = clnt->cl_parent; in rpc_switch_client_transport()
771 clnt->cl_parent = clnt; in rpc_switch_client_transport()
774 * The old rpc_auth cache cannot be re-used. GSS in rpc_switch_client_transport()
779 if (err) in rpc_switch_client_transport()
783 if (parent != clnt) in rpc_switch_client_transport()
791 xps = xprt_iter_xchg_switch(&clnt->cl_xpi, oldxps); in rpc_switch_client_transport()
793 clnt->cl_parent = parent; in rpc_switch_client_transport()
809 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in _rpc_clnt_xprt_iter_init()
811 if (xps == NULL) in _rpc_clnt_xprt_iter_init()
812 return -EAGAIN; in _rpc_clnt_xprt_iter_init()
832 * rpc_clnt_iterate_for_each_xprt - Apply a function to all transports
837 * Iterates through the list of RPC transports currently attached to the
850 if (ret) in rpc_clnt_iterate_for_each_xprt()
855 if (!xprt) in rpc_clnt_iterate_for_each_xprt()
859 if (ret < 0) in rpc_clnt_iterate_for_each_xprt()
876 if (list_empty(&clnt->cl_tasks)) in rpc_killall_tasks()
883 spin_lock(&clnt->cl_lock); in rpc_killall_tasks()
884 list_for_each_entry(rovr, &clnt->cl_tasks, tk_task) in rpc_killall_tasks()
886 spin_unlock(&clnt->cl_lock); in rpc_killall_tasks()
891 * rpc_cancel_tasks - try to cancel a set of RPC tasks
892 * @clnt: Pointer to RPC client
893 * @error: RPC task error value to set
897 * Uses @fnmatch to define a set of RPC tasks that are to be cancelled.
908 if (list_empty(&clnt->cl_tasks)) in rpc_cancel_tasks()
913 spin_lock(&clnt->cl_lock); in rpc_cancel_tasks()
914 list_for_each_entry(task, &clnt->cl_tasks, tk_task) { in rpc_cancel_tasks()
915 if (!RPC_IS_ACTIVATED(task)) in rpc_cancel_tasks()
917 if (!fnmatch(task, data)) in rpc_cancel_tasks()
922 spin_unlock(&clnt->cl_lock); in rpc_cancel_tasks()
930 if (xprt_connected(xprt)) in rpc_clnt_disconnect_xprt()
942 * Properly shut down an RPC client, terminating all outstanding
951 while (!list_empty(&clnt->cl_tasks)) { in rpc_shutdown_client()
954 list_empty(&clnt->cl_tasks), 1*HZ); in rpc_shutdown_client()
962 * Free an RPC client
978 xprt_put(rcu_dereference_raw(clnt->cl_xprt)); in rpc_free_client_work()
989 if (clnt->cl_parent != clnt) in rpc_free_client()
990 parent = clnt->cl_parent; in rpc_free_client()
992 rpc_free_iostats(clnt->cl_metrics); in rpc_free_client()
993 clnt->cl_metrics = NULL; in rpc_free_client()
994 xprt_iter_destroy(&clnt->cl_xpi); in rpc_free_client()
995 put_cred(clnt->cl_cred); in rpc_free_client()
997 INIT_WORK(&clnt->cl_work, rpc_free_client_work); in rpc_free_client()
998 schedule_work(&clnt->cl_work); in rpc_free_client()
1003 * Free an RPC client
1009 * Note: RPCSEC_GSS may need to send NULL RPC calls in order to in rpc_free_auth()
1013 if (clnt->cl_auth != NULL) { in rpc_free_auth()
1014 rpcauth_release(clnt->cl_auth); in rpc_free_auth()
1015 clnt->cl_auth = NULL; in rpc_free_auth()
1017 if (refcount_dec_and_test(&clnt->cl_count)) in rpc_free_auth()
1023 * Release reference to the RPC client
1029 if (list_empty(&clnt->cl_tasks)) in rpc_release_client()
1031 if (refcount_dec_not_one(&clnt->cl_count)) in rpc_release_client()
1039 * rpc_bind_new_program - bind a new RPC program to an existing client
1041 * @program: rpc program to set
1042 * @vers: rpc program version
1044 * Clones the rpc client and sets up a new RPC program. This is mainly
1045 * of use for enabling different RPC programs to share the same transport.
1054 .prognumber = program->number, in rpc_bind_new_program()
1056 .authflavor = old->cl_auth->au_flavor, in rpc_bind_new_program()
1057 .cred = old->cl_cred, in rpc_bind_new_program()
1058 .stats = old->cl_stats, in rpc_bind_new_program()
1059 .timeout = old->cl_timeout, in rpc_bind_new_program()
1065 if (IS_ERR(clnt)) in rpc_bind_new_program()
1068 if (err != 0) { in rpc_bind_new_program()
1082 if (!xprt) in rpc_task_get_xprt()
1085 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_task_get_xprt()
1086 atomic_long_inc(&xps->xps_queuelen); in rpc_task_get_xprt()
1088 atomic_long_inc(&xprt->queuelen); in rpc_task_get_xprt()
1098 atomic_long_dec(&xprt->queuelen); in rpc_task_release_xprt()
1100 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_task_release_xprt()
1101 atomic_long_dec(&xps->xps_queuelen); in rpc_task_release_xprt()
1109 struct rpc_xprt *xprt = task->tk_xprt; in rpc_task_release_transport()
1111 if (xprt) { in rpc_task_release_transport()
1112 task->tk_xprt = NULL; in rpc_task_release_transport()
1113 if (task->tk_client) in rpc_task_release_transport()
1114 rpc_task_release_xprt(task->tk_client, xprt); in rpc_task_release_transport()
1123 struct rpc_clnt *clnt = task->tk_client; in rpc_task_release_client()
1126 if (clnt != NULL) { in rpc_task_release_client()
1128 spin_lock(&clnt->cl_lock); in rpc_task_release_client()
1129 list_del(&task->tk_task); in rpc_task_release_client()
1130 spin_unlock(&clnt->cl_lock); in rpc_task_release_client()
1131 task->tk_client = NULL; in rpc_task_release_client()
1143 xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); in rpc_task_get_first_xprt()
1151 return rpc_task_get_xprt(clnt, xprt_iter_get_next(&clnt->cl_xpi)); in rpc_task_get_next_xprt()
1157 if (task->tk_xprt) { in rpc_task_set_transport()
1158 if (!(test_bit(XPRT_OFFLINE, &task->tk_xprt->state) && in rpc_task_set_transport()
1159 (task->tk_flags & RPC_TASK_MOVEABLE))) in rpc_task_set_transport()
1162 xprt_put(task->tk_xprt); in rpc_task_set_transport()
1164 if (task->tk_flags & RPC_TASK_NO_ROUND_ROBIN) in rpc_task_set_transport()
1165 task->tk_xprt = rpc_task_get_first_xprt(clnt); in rpc_task_set_transport()
1167 task->tk_xprt = rpc_task_get_next_xprt(clnt); in rpc_task_set_transport()
1174 task->tk_client = clnt; in rpc_task_set_client()
1175 refcount_inc(&clnt->cl_count); in rpc_task_set_client()
1176 if (clnt->cl_softrtry) in rpc_task_set_client()
1177 task->tk_flags |= RPC_TASK_SOFT; in rpc_task_set_client()
1178 if (clnt->cl_softerr) in rpc_task_set_client()
1179 task->tk_flags |= RPC_TASK_TIMEOUT; in rpc_task_set_client()
1180 if (clnt->cl_noretranstimeo) in rpc_task_set_client()
1181 task->tk_flags |= RPC_TASK_NO_RETRANS_TIMEOUT; in rpc_task_set_client()
1183 spin_lock(&clnt->cl_lock); in rpc_task_set_client()
1184 list_add_tail(&task->tk_task, &clnt->cl_tasks); in rpc_task_set_client()
1185 spin_unlock(&clnt->cl_lock); in rpc_task_set_client()
1191 if (msg != NULL) { in rpc_task_set_rpc_message()
1192 task->tk_msg.rpc_proc = msg->rpc_proc; in rpc_task_set_rpc_message()
1193 task->tk_msg.rpc_argp = msg->rpc_argp; in rpc_task_set_rpc_message()
1194 task->tk_msg.rpc_resp = msg->rpc_resp; in rpc_task_set_rpc_message()
1195 task->tk_msg.rpc_cred = msg->rpc_cred; in rpc_task_set_rpc_message()
1196 if (!(task->tk_flags & RPC_TASK_CRED_NOREF)) in rpc_task_set_rpc_message()
1197 get_cred(task->tk_msg.rpc_cred); in rpc_task_set_rpc_message()
1202 * Default callback for async RPC calls
1214 * rpc_run_task - Allocate a new RPC task, then run rpc_execute against it
1222 if (IS_ERR(task)) in rpc_run_task()
1225 if (!RPC_IS_ASYNC(task)) in rpc_run_task()
1226 task->tk_flags |= RPC_TASK_CRED_NOREF; in rpc_run_task()
1228 rpc_task_set_client(task, task_setup_data->rpc_client); in rpc_run_task()
1229 rpc_task_set_rpc_message(task, task_setup_data->rpc_message); in rpc_run_task()
1231 if (task->tk_action == NULL) in rpc_run_task()
1234 atomic_inc(&task->tk_count); in rpc_run_task()
1241 * rpc_call_sync - Perform a synchronous RPC call
1242 * @clnt: pointer to RPC client
1243 * @msg: RPC call parameters
1244 * @flags: RPC call flags
1258 if (flags & RPC_TASK_ASYNC) { in rpc_call_sync()
1261 return -EINVAL; in rpc_call_sync()
1265 if (IS_ERR(task)) in rpc_call_sync()
1267 status = task->tk_status; in rpc_call_sync()
1274 * rpc_call_async - Perform an asynchronous RPC call
1275 * @clnt: pointer to RPC client
1276 * @msg: RPC call parameters
1277 * @flags: RPC call flags
1278 * @tk_ops: RPC call ops
1295 if (IS_ERR(task)) in rpc_call_async()
1302 #if defined(CONFIG_SUNRPC_BACKCHANNEL)
1306 * rpc_run_bc_task - Allocate a new RPC task for backchannel use, then run
1308 * @req: RPC request
1319 dprintk("RPC: rpc_run_bc_task req= %p\n", req); in rpc_run_bc_task()
1324 if (IS_ERR(task)) { in rpc_run_bc_task()
1331 task->tk_action = call_bc_encode; in rpc_run_bc_task()
1332 atomic_inc(&task->tk_count); in rpc_run_bc_task()
1333 WARN_ON_ONCE(atomic_read(&task->tk_count) != 2); in rpc_run_bc_task()
1336 dprintk("RPC: rpc_run_bc_task: task= %p\n", task); in rpc_run_bc_task()
1342 * rpc_prepare_reply_pages - Prepare to receive a reply data payload into pages
1343 * @req: RPC request to prepare
1354 hdrsize += RPC_REPHDRSIZE + req->rq_cred->cr_auth->au_ralign; in rpc_prepare_reply_pages()
1356 xdr_inline_pages(&req->rq_rcv_buf, hdrsize << 2, pages, base, len); in rpc_prepare_reply_pages()
1357 trace_rpc_xdr_reply_pages(req->rq_task, &req->rq_rcv_buf); in rpc_prepare_reply_pages()
1364 task->tk_action = call_start; in rpc_call_start()
1369 * rpc_peeraddr - extract remote peer address from clnt's xprt
1370 * @clnt: RPC client structure
1382 xprt = rcu_dereference(clnt->cl_xprt); in rpc_peeraddr()
1384 bytes = xprt->addrlen; in rpc_peeraddr()
1385 if (bytes > bufsize) in rpc_peeraddr()
1387 memcpy(buf, &xprt->addr, bytes); in rpc_peeraddr()
1395 * rpc_peeraddr2str - return remote peer address in printable format
1396 * @clnt: RPC client structure
1408 xprt = rcu_dereference(clnt->cl_xprt); in rpc_peeraddr2str()
1410 if (xprt->address_strings[format] != NULL) in rpc_peeraddr2str()
1411 return xprt->address_strings[format]; in rpc_peeraddr2str()
1432 * Returns zero and fills in "buf" if successful; otherwise, a
1441 err = __sock_create(net, sap->sa_family, in rpc_sockname()
1443 if (err < 0) { in rpc_sockname()
1444 dprintk("RPC: can't create UDP socket (%d)\n", err); in rpc_sockname()
1448 switch (sap->sa_family) { in rpc_sockname()
1460 err = -EAFNOSUPPORT; in rpc_sockname()
1463 if (err < 0) { in rpc_sockname()
1464 dprintk("RPC: can't bind UDP socket (%d)\n", err); in rpc_sockname()
1469 if (err < 0) { in rpc_sockname()
1470 dprintk("RPC: can't connect UDP socket (%d)\n", err); in rpc_sockname()
1475 if (err < 0) { in rpc_sockname()
1476 dprintk("RPC: getsockname failed (%d)\n", err); in rpc_sockname()
1481 if (buf->sa_family == AF_INET6) { in rpc_sockname()
1483 sin6->sin6_scope_id = 0; in rpc_sockname()
1485 dprintk("RPC: %s succeeded\n", __func__); in rpc_sockname()
1498 * Returns zero and fills in "buf" if successful; otherwise, a
1505 if (buflen < sizeof(rpc_inaddr_loopback)) in rpc_anyaddr()
1506 return -EINVAL; in rpc_anyaddr()
1511 if (buflen < sizeof(rpc_in6addr_loopback)) in rpc_anyaddr()
1512 return -EINVAL; in rpc_anyaddr()
1517 dprintk("RPC: %s: address family not supported\n", in rpc_anyaddr()
1519 return -EAFNOSUPPORT; in rpc_anyaddr()
1521 dprintk("RPC: %s: succeeded\n", __func__); in rpc_anyaddr()
1526 * rpc_localaddr - discover local endpoint address for an RPC client
1527 * @clnt: RPC client structure
1531 * Returns zero and fills in "buf" and "buflen" if successful;
1534 * This works even if the underlying transport is not currently connected,
1535 * or if the upper layer never previously provided a source address.
1551 xprt = rcu_dereference(clnt->cl_xprt); in rpc_localaddr()
1552 salen = xprt->addrlen; in rpc_localaddr()
1553 memcpy(sap, &xprt->addr, salen); in rpc_localaddr()
1554 net = get_net(xprt->xprt_net); in rpc_localaddr()
1560 if (err != 0) in rpc_localaddr()
1562 return rpc_anyaddr(sap->sa_family, buf, buflen); in rpc_localaddr()
1573 xprt = rcu_dereference(clnt->cl_xprt); in rpc_setbufsize()
1574 if (xprt->ops->set_buffer_size) in rpc_setbufsize()
1575 xprt->ops->set_buffer_size(xprt, sndsize, rcvsize); in rpc_setbufsize()
1581 * rpc_net_ns - Get the network namespace for this RPC client
1582 * @clnt: RPC client to query
1590 ret = rcu_dereference(clnt->cl_xprt)->xprt_net; in rpc_net_ns()
1597 * rpc_max_payload - Get maximum payload size for a transport, in bytes
1598 * @clnt: RPC client to query
1600 * For stream transports, this is one RPC record fragment (see RFC
1601 * 1831), as we don't support multi-record requests yet. For datagram
1603 * RPC header sizes.
1610 ret = rcu_dereference(clnt->cl_xprt)->max_payload; in rpc_max_payload()
1617 * rpc_max_bc_payload - Get maximum backchannel payload size, in bytes
1618 * @clnt: RPC client to query
1626 xprt = rcu_dereference(clnt->cl_xprt); in rpc_max_bc_payload()
1627 ret = xprt->ops->bc_maxpayload(xprt); in rpc_max_bc_payload()
1639 xprt = rcu_dereference(clnt->cl_xprt); in rpc_num_bc_slots()
1640 ret = xprt->ops->bc_num_slots(xprt); in rpc_num_bc_slots()
1647 * rpc_force_rebind - force transport to check that remote port is unchanged
1653 if (clnt->cl_autobind) { in rpc_force_rebind()
1655 xprt_clear_bound(rcu_dereference(clnt->cl_xprt)); in rpc_force_rebind()
1664 task->tk_status = 0; in __rpc_restart_call()
1665 task->tk_rpc_status = 0; in __rpc_restart_call()
1666 task->tk_action = action; in __rpc_restart_call()
1671 * Restart an (async) RPC call. Usually called from within the
1682 * Restart an (async) RPC call from the call_prepare state.
1688 if (task->tk_ops->rpc_call_prepare != NULL) in rpc_restart_call_prepare()
1697 const struct rpc_procinfo *proc = task->tk_msg.rpc_proc; in rpc_proc_name()
1699 if (proc) { in rpc_proc_name()
1700 if (proc->p_name) in rpc_proc_name()
1701 return proc->p_name; in rpc_proc_name()
1726 * this state is visited exactly once for each RPC.
1731 struct rpc_clnt *clnt = task->tk_client; in call_start()
1732 int idx = task->tk_msg.rpc_proc->p_statidx; in call_start()
1736 if (task->tk_client->cl_shutdown) { in call_start()
1737 rpc_call_rpcerror(task, -EIO); in call_start()
1742 if (clnt->cl_program->version[clnt->cl_vers]) in call_start()
1743 clnt->cl_program->version[clnt->cl_vers]->counts[idx]++; in call_start()
1744 clnt->cl_stats->rpccnt++; in call_start()
1745 task->tk_action = call_reserve; in call_start()
1750 * 1. Reserve an RPC call slot
1755 task->tk_status = 0; in call_reserve()
1756 task->tk_action = call_reserveresult; in call_reserve()
1768 int status = task->tk_status; in call_reserveresult()
1774 task->tk_status = 0; in call_reserveresult()
1775 if (status >= 0) { in call_reserveresult()
1776 if (task->tk_rqstp) { in call_reserveresult()
1777 task->tk_action = call_refresh; in call_reserveresult()
1781 rpc_call_rpcerror(task, -EIO); in call_reserveresult()
1786 case -ENOMEM: in call_reserveresult()
1789 case -EAGAIN: /* woken up; retry */ in call_reserveresult()
1790 task->tk_action = call_retry_reserve; in call_reserveresult()
1798 * 1c. Retry reserving an RPC call slot
1803 task->tk_status = 0; in call_retry_reserve()
1804 task->tk_action = call_reserveresult; in call_retry_reserve()
1814 task->tk_action = call_refreshresult; in call_refresh()
1815 task->tk_status = 0; in call_refresh()
1816 task->tk_client->cl_stats->rpcauthrefresh++; in call_refresh()
1826 int status = task->tk_status; in call_refreshresult()
1828 task->tk_status = 0; in call_refreshresult()
1829 task->tk_action = call_refresh; in call_refreshresult()
1832 if (rpcauth_uptodatecred(task)) { in call_refreshresult()
1833 task->tk_action = call_allocate; in call_refreshresult()
1836 /* Use rate-limiting and a max number of retries if refresh in call_refreshresult()
1840 case -ETIMEDOUT: in call_refreshresult()
1843 case -EAGAIN: in call_refreshresult()
1844 status = -EACCES; in call_refreshresult()
1846 case -EKEYEXPIRED: in call_refreshresult()
1847 if (!task->tk_cred_retry) in call_refreshresult()
1849 task->tk_cred_retry--; in call_refreshresult()
1852 case -ENOMEM: in call_refreshresult()
1867 const struct rpc_auth *auth = task->tk_rqstp->rq_cred->cr_auth; in call_allocate()
1868 struct rpc_rqst *req = task->tk_rqstp; in call_allocate()
1869 struct rpc_xprt *xprt = req->rq_xprt; in call_allocate()
1870 const struct rpc_procinfo *proc = task->tk_msg.rpc_proc; in call_allocate()
1873 task->tk_status = 0; in call_allocate()
1874 task->tk_action = call_encode; in call_allocate()
1876 if (req->rq_buffer) in call_allocate()
1879 if (proc->p_proc != 0) { in call_allocate()
1880 BUG_ON(proc->p_arglen == 0); in call_allocate()
1881 if (proc->p_decode != NULL) in call_allocate()
1882 BUG_ON(proc->p_replen == 0); in call_allocate()
1886 * Calculate the size (in quads) of the RPC call in call_allocate()
1890 req->rq_callsize = RPC_CALLHDRSIZE + (auth->au_cslack << 1) + in call_allocate()
1891 proc->p_arglen; in call_allocate()
1892 req->rq_callsize <<= 2; in call_allocate()
1897 req->rq_rcvsize = RPC_REPHDRSIZE + auth->au_rslack + \ in call_allocate()
1898 max_t(size_t, proc->p_replen, 2); in call_allocate()
1899 req->rq_rcvsize <<= 2; in call_allocate()
1901 status = xprt->ops->buf_alloc(task); in call_allocate()
1903 if (status == 0) in call_allocate()
1905 if (status != -ENOMEM) { in call_allocate()
1910 if (RPC_IS_ASYNC(task) || !fatal_signal_pending(current)) { in call_allocate()
1911 task->tk_action = call_allocate; in call_allocate()
1916 rpc_call_rpcerror(task, -ERESTARTSYS); in call_allocate()
1922 return test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate) == 0 && in rpc_task_need_encode()
1923 (!(task->tk_flags & RPC_TASK_SENT) || in rpc_task_need_encode()
1924 !(task->tk_flags & RPC_TASK_NO_RETRANS_TIMEOUT) || in rpc_task_need_encode()
1931 struct rpc_rqst *req = task->tk_rqstp; in rpc_xdr_encode()
1934 xdr_buf_init(&req->rq_snd_buf, in rpc_xdr_encode()
1935 req->rq_buffer, in rpc_xdr_encode()
1936 req->rq_callsize); in rpc_xdr_encode()
1937 xdr_buf_init(&req->rq_rcv_buf, in rpc_xdr_encode()
1938 req->rq_rbuffer, in rpc_xdr_encode()
1939 req->rq_rcvsize); in rpc_xdr_encode()
1941 req->rq_reply_bytes_recvd = 0; in rpc_xdr_encode()
1942 req->rq_snd_buf.head[0].iov_len = 0; in rpc_xdr_encode()
1943 xdr_init_encode(&xdr, &req->rq_snd_buf, in rpc_xdr_encode()
1944 req->rq_snd_buf.head[0].iov_base, req); in rpc_xdr_encode()
1945 if (rpc_encode_header(task, &xdr)) in rpc_xdr_encode()
1948 task->tk_status = rpcauth_wrap_req(task, &xdr); in rpc_xdr_encode()
1952 * 3. Encode arguments of an RPC call
1957 if (!rpc_task_need_encode(task)) in call_encode()
1965 if (task->tk_status == 0 && rpc_reply_expected(task)) in call_encode()
1966 task->tk_status = xprt_request_enqueue_receive(task); in call_encode()
1968 if (task->tk_status != 0) { in call_encode()
1970 switch (task->tk_status) { in call_encode()
1971 case -EAGAIN: in call_encode()
1972 case -ENOMEM: in call_encode()
1975 case -EKEYEXPIRED: in call_encode()
1976 if (!task->tk_cred_retry) { in call_encode()
1977 rpc_call_rpcerror(task, task->tk_status); in call_encode()
1979 task->tk_action = call_refresh; in call_encode()
1980 task->tk_cred_retry--; in call_encode()
1985 rpc_call_rpcerror(task, task->tk_status); in call_encode()
1992 task->tk_action = call_transmit; in call_encode()
1994 if (!xprt_bound(task->tk_xprt)) in call_encode()
1995 task->tk_action = call_bind; in call_encode()
1996 else if (!xprt_connected(task->tk_xprt)) in call_encode()
1997 task->tk_action = call_connect; in call_encode()
2001 * Helpers to check if the task was already transmitted, and
2007 return !test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate); in rpc_task_transmitted()
2014 task->tk_action = call_transmit_status; in rpc_task_handle_transmitted()
2018 * 4. Get the server port number if not yet set
2023 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_bind()
2025 if (rpc_task_transmitted(task)) { in call_bind()
2030 if (xprt_bound(xprt)) { in call_bind()
2031 task->tk_action = call_connect; in call_bind()
2035 task->tk_action = call_bind_status; in call_bind()
2036 if (!xprt_prepare_transmit(task)) in call_bind()
2039 xprt->ops->rpcbind(task); in call_bind()
2048 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_bind_status()
2049 int status = -EIO; in call_bind_status()
2051 if (rpc_task_transmitted(task)) { in call_bind_status()
2056 if (task->tk_status >= 0) in call_bind_status()
2058 if (xprt_bound(xprt)) { in call_bind_status()
2059 task->tk_status = 0; in call_bind_status()
2063 switch (task->tk_status) { in call_bind_status()
2064 case -ENOMEM: in call_bind_status()
2067 case -EACCES: in call_bind_status()
2069 /* fail immediately if this is an RPC ping */ in call_bind_status()
2070 if (task->tk_msg.rpc_proc->p_proc == 0) { in call_bind_status()
2071 status = -EOPNOTSUPP; in call_bind_status()
2076 case -ENOBUFS: in call_bind_status()
2079 case -EAGAIN: in call_bind_status()
2081 case -ETIMEDOUT: in call_bind_status()
2084 case -EPFNOSUPPORT: in call_bind_status()
2088 case -EPROTONOSUPPORT: in call_bind_status()
2091 case -ECONNREFUSED: /* connection problems */ in call_bind_status()
2092 case -ECONNRESET: in call_bind_status()
2093 case -ECONNABORTED: in call_bind_status()
2094 case -ENOTCONN: in call_bind_status()
2095 case -EHOSTDOWN: in call_bind_status()
2096 case -ENETDOWN: in call_bind_status()
2097 case -EHOSTUNREACH: in call_bind_status()
2098 case -ENETUNREACH: in call_bind_status()
2099 case -EPIPE: in call_bind_status()
2101 if (!RPC_IS_SOFTCONN(task)) { in call_bind_status()
2105 status = task->tk_status; in call_bind_status()
2114 task->tk_action = call_connect; in call_bind_status()
2117 task->tk_status = 0; in call_bind_status()
2118 task->tk_action = call_bind; in call_bind_status()
2123 * 4b. Connect to the RPC server
2128 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_connect()
2130 if (rpc_task_transmitted(task)) { in call_connect()
2135 if (xprt_connected(xprt)) { in call_connect()
2136 task->tk_action = call_transmit; in call_connect()
2140 task->tk_action = call_connect_status; in call_connect()
2141 if (task->tk_status < 0) in call_connect()
2143 if (task->tk_flags & RPC_TASK_NOCONNECT) { in call_connect()
2144 rpc_call_rpcerror(task, -ENOTCONN); in call_connect()
2147 if (!xprt_prepare_transmit(task)) in call_connect()
2158 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_connect_status()
2159 struct rpc_clnt *clnt = task->tk_client; in call_connect_status()
2160 int status = task->tk_status; in call_connect_status()
2162 if (rpc_task_transmitted(task)) { in call_connect_status()
2169 if (task->tk_status == 0) { in call_connect_status()
2170 clnt->cl_stats->netreconn++; in call_connect_status()
2173 if (xprt_connected(xprt)) { in call_connect_status()
2174 task->tk_status = 0; in call_connect_status()
2178 task->tk_status = 0; in call_connect_status()
2180 case -ECONNREFUSED: in call_connect_status()
2181 case -ECONNRESET: in call_connect_status()
2183 if (RPC_IS_SOFTCONN(task)) in call_connect_status()
2185 if (clnt->cl_autobind) { in call_connect_status()
2190 case -ECONNABORTED: in call_connect_status()
2191 case -ENETDOWN: in call_connect_status()
2192 case -ENETUNREACH: in call_connect_status()
2193 case -EHOSTUNREACH: in call_connect_status()
2194 case -EPIPE: in call_connect_status()
2195 case -EPROTO: in call_connect_status()
2196 xprt_conditional_disconnect(task->tk_rqstp->rq_xprt, in call_connect_status()
2197 task->tk_rqstp->rq_connect_cookie); in call_connect_status()
2198 if (RPC_IS_SOFTCONN(task)) in call_connect_status()
2203 case -EADDRINUSE: in call_connect_status()
2204 case -ENOTCONN: in call_connect_status()
2205 case -EAGAIN: in call_connect_status()
2206 case -ETIMEDOUT: in call_connect_status()
2207 if (!(task->tk_flags & RPC_TASK_NO_ROUND_ROBIN) && in call_connect_status()
2208 (task->tk_flags & RPC_TASK_MOVEABLE) && in call_connect_status()
2209 test_bit(XPRT_REMOVE, &xprt->state)) { in call_connect_status()
2210 struct rpc_xprt *saved = task->tk_xprt; in call_connect_status()
2214 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in call_connect_status()
2216 if (xps->xps_nxprts > 1) { in call_connect_status()
2220 value = atomic_long_dec_return(&xprt->queuelen); in call_connect_status()
2221 if (value == 0) in call_connect_status()
2225 task->tk_xprt = NULL; in call_connect_status()
2226 task->tk_action = call_start; in call_connect_status()
2229 if (!task->tk_xprt) in call_connect_status()
2233 case -ENOBUFS: in call_connect_status()
2240 task->tk_action = call_transmit; in call_connect_status()
2244 task->tk_action = call_bind; in call_connect_status()
2249 * 5. Transmit the RPC request, and wait for reply
2254 if (rpc_task_transmitted(task)) { in call_transmit()
2259 task->tk_action = call_transmit_status; in call_transmit()
2260 if (!xprt_prepare_transmit(task)) in call_transmit()
2262 task->tk_status = 0; in call_transmit()
2263 if (test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) { in call_transmit()
2264 if (!xprt_connected(task->tk_xprt)) { in call_transmit()
2265 task->tk_status = -ENOTCONN; in call_transmit()
2279 task->tk_action = call_status; in call_transmit_status()
2285 if (rpc_task_transmitted(task)) { in call_transmit_status()
2286 task->tk_status = 0; in call_transmit_status()
2291 switch (task->tk_status) { in call_transmit_status()
2294 case -EBADMSG: in call_transmit_status()
2295 task->tk_status = 0; in call_transmit_status()
2296 task->tk_action = call_encode; in call_transmit_status()
2299 * Special cases: if we've been waiting on the in call_transmit_status()
2300 * socket's write_space() callback, or if the in call_transmit_status()
2304 case -ENOMEM: in call_transmit_status()
2305 case -ENOBUFS: in call_transmit_status()
2308 case -EBADSLT: in call_transmit_status()
2309 case -EAGAIN: in call_transmit_status()
2310 task->tk_action = call_transmit; in call_transmit_status()
2311 task->tk_status = 0; in call_transmit_status()
2313 case -EHOSTDOWN: in call_transmit_status()
2314 case -ENETDOWN: in call_transmit_status()
2315 case -EHOSTUNREACH: in call_transmit_status()
2316 case -ENETUNREACH: in call_transmit_status()
2317 case -EPERM: in call_transmit_status()
2319 case -ECONNREFUSED: in call_transmit_status()
2320 if (RPC_IS_SOFTCONN(task)) { in call_transmit_status()
2321 if (!task->tk_msg.rpc_proc->p_proc) in call_transmit_status()
2322 trace_xprt_ping(task->tk_xprt, in call_transmit_status()
2323 task->tk_status); in call_transmit_status()
2324 rpc_call_rpcerror(task, task->tk_status); in call_transmit_status()
2328 case -ECONNRESET: in call_transmit_status()
2329 case -ECONNABORTED: in call_transmit_status()
2330 case -EADDRINUSE: in call_transmit_status()
2331 case -ENOTCONN: in call_transmit_status()
2332 case -EPIPE: in call_transmit_status()
2333 task->tk_action = call_bind; in call_transmit_status()
2334 task->tk_status = 0; in call_transmit_status()
2340 #if defined(CONFIG_SUNRPC_BACKCHANNEL)
2348 task->tk_action = call_bc_transmit; in call_bc_encode()
2352 * 5b. Send the backchannel RPC reply. On error, drop the reply. In
2358 task->tk_action = call_bc_transmit_status; in call_bc_transmit()
2359 if (test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) { in call_bc_transmit()
2360 if (!xprt_prepare_transmit(task)) in call_bc_transmit()
2362 task->tk_status = 0; in call_bc_transmit()
2371 struct rpc_rqst *req = task->tk_rqstp; in call_bc_transmit_status()
2373 if (rpc_task_transmitted(task)) in call_bc_transmit_status()
2374 task->tk_status = 0; in call_bc_transmit_status()
2376 switch (task->tk_status) { in call_bc_transmit_status()
2379 case -ENETDOWN: in call_bc_transmit_status()
2380 case -EHOSTDOWN: in call_bc_transmit_status()
2381 case -EHOSTUNREACH: in call_bc_transmit_status()
2382 case -ENETUNREACH: in call_bc_transmit_status()
2383 case -ECONNRESET: in call_bc_transmit_status()
2384 case -ECONNREFUSED: in call_bc_transmit_status()
2385 case -EADDRINUSE: in call_bc_transmit_status()
2386 case -ENOTCONN: in call_bc_transmit_status()
2387 case -EPIPE: in call_bc_transmit_status()
2389 case -ENOMEM: in call_bc_transmit_status()
2390 case -ENOBUFS: in call_bc_transmit_status()
2393 case -EBADSLT: in call_bc_transmit_status()
2394 case -EAGAIN: in call_bc_transmit_status()
2395 task->tk_status = 0; in call_bc_transmit_status()
2396 task->tk_action = call_bc_transmit; in call_bc_transmit_status()
2398 case -ETIMEDOUT: in call_bc_transmit_status()
2406 printk(KERN_NOTICE "RPC: Could not send backchannel reply " in call_bc_transmit_status()
2407 "error: %d\n", task->tk_status); in call_bc_transmit_status()
2408 xprt_conditional_disconnect(req->rq_xprt, in call_bc_transmit_status()
2409 req->rq_connect_cookie); in call_bc_transmit_status()
2416 printk(KERN_NOTICE "RPC: Could not send backchannel reply " in call_bc_transmit_status()
2417 "error: %d\n", task->tk_status); in call_bc_transmit_status()
2420 task->tk_action = rpc_exit_task; in call_bc_transmit_status()
2425 * 6. Sort out the RPC call status
2430 struct rpc_clnt *clnt = task->tk_client; in call_status()
2433 if (!task->tk_msg.rpc_proc->p_proc) in call_status()
2434 trace_xprt_ping(task->tk_xprt, task->tk_status); in call_status()
2436 status = task->tk_status; in call_status()
2437 if (status >= 0) { in call_status()
2438 task->tk_action = call_decode; in call_status()
2443 task->tk_status = 0; in call_status()
2445 case -EHOSTDOWN: in call_status()
2446 case -ENETDOWN: in call_status()
2447 case -EHOSTUNREACH: in call_status()
2448 case -ENETUNREACH: in call_status()
2449 case -EPERM: in call_status()
2450 if (RPC_IS_SOFTCONN(task)) in call_status()
2453 * Delay any retries for 3 seconds, then handle as if it in call_status()
2458 case -ETIMEDOUT: in call_status()
2460 case -ECONNREFUSED: in call_status()
2461 case -ECONNRESET: in call_status()
2462 case -ECONNABORTED: in call_status()
2463 case -ENOTCONN: in call_status()
2466 case -EADDRINUSE: in call_status()
2469 case -EPIPE: in call_status()
2470 case -EAGAIN: in call_status()
2472 case -ENFILE: in call_status()
2473 case -ENOBUFS: in call_status()
2474 case -ENOMEM: in call_status()
2477 case -EIO: in call_status()
2481 if (clnt->cl_chatty) in call_status()
2482 printk("%s: RPC call returned error %d\n", in call_status()
2483 clnt->cl_program->name, -status); in call_status()
2486 task->tk_action = call_encode; in call_status()
2497 if (!req || !req->rq_xprt) in rpc_check_connected()
2499 return xprt_connected(req->rq_xprt); in rpc_check_connected()
2505 struct rpc_clnt *clnt = task->tk_client; in rpc_check_timeout()
2507 if (RPC_SIGNALLED(task)) in rpc_check_timeout()
2510 if (xprt_adjust_timeout(task->tk_rqstp) == 0) in rpc_check_timeout()
2514 task->tk_timeouts++; in rpc_check_timeout()
2516 if (RPC_IS_SOFTCONN(task) && !rpc_check_connected(task->tk_rqstp)) { in rpc_check_timeout()
2517 rpc_call_rpcerror(task, -ETIMEDOUT); in rpc_check_timeout()
2521 if (RPC_IS_SOFT(task)) { in rpc_check_timeout()
2524 * been sent, it should time out only if the transport in rpc_check_timeout()
2527 if ((task->tk_flags & RPC_TASK_NO_RETRANS_TIMEOUT) && in rpc_check_timeout()
2528 rpc_check_connected(task->tk_rqstp)) in rpc_check_timeout()
2531 if (clnt->cl_chatty) { in rpc_check_timeout()
2534 clnt->cl_program->name, in rpc_check_timeout()
2535 task->tk_xprt->servername); in rpc_check_timeout()
2537 if (task->tk_flags & RPC_TASK_TIMEOUT) in rpc_check_timeout()
2538 rpc_call_rpcerror(task, -ETIMEDOUT); in rpc_check_timeout()
2540 __rpc_call_rpcerror(task, -EIO, -ETIMEDOUT); in rpc_check_timeout()
2544 if (!(task->tk_flags & RPC_CALL_MAJORSEEN)) { in rpc_check_timeout()
2545 task->tk_flags |= RPC_CALL_MAJORSEEN; in rpc_check_timeout()
2546 if (clnt->cl_chatty) { in rpc_check_timeout()
2549 clnt->cl_program->name, in rpc_check_timeout()
2550 task->tk_xprt->servername); in rpc_check_timeout()
2555 * Did our request time out due to an RPCSEC_GSS out-of-sequence in rpc_check_timeout()
2562 * 7. Decode the RPC reply
2567 struct rpc_clnt *clnt = task->tk_client; in call_decode()
2568 struct rpc_rqst *req = task->tk_rqstp; in call_decode()
2572 if (!task->tk_msg.rpc_proc->p_decode) { in call_decode()
2573 task->tk_action = rpc_exit_task; in call_decode()
2577 if (task->tk_flags & RPC_CALL_MAJORSEEN) { in call_decode()
2578 if (clnt->cl_chatty) { in call_decode()
2580 clnt->cl_program->name, in call_decode()
2581 task->tk_xprt->servername); in call_decode()
2583 task->tk_flags &= ~RPC_CALL_MAJORSEEN; in call_decode()
2587 * Did we ever call xprt_complete_rqst()? If not, we should assume in call_decode()
2590 err = -EAGAIN; in call_decode()
2591 if (!req->rq_reply_bytes_recvd) in call_decode()
2595 * before it changed req->rq_reply_bytes_recvd. in call_decode()
2599 req->rq_rcv_buf.len = req->rq_private_buf.len; in call_decode()
2600 trace_rpc_xdr_recvfrom(task, &req->rq_rcv_buf); in call_decode()
2603 WARN_ON(memcmp(&req->rq_rcv_buf, &req->rq_private_buf, in call_decode()
2604 sizeof(req->rq_rcv_buf)) != 0); in call_decode()
2606 xdr_init_decode(&xdr, &req->rq_rcv_buf, in call_decode()
2607 req->rq_rcv_buf.head[0].iov_base, req); in call_decode()
2612 task->tk_action = rpc_exit_task; in call_decode()
2613 task->tk_status = rpcauth_unwrap_resp(task, &xdr); in call_decode()
2616 case -EAGAIN: in call_decode()
2617 task->tk_status = 0; in call_decode()
2618 if (task->tk_client->cl_discrtry) in call_decode()
2619 xprt_conditional_disconnect(req->rq_xprt, in call_decode()
2620 req->rq_connect_cookie); in call_decode()
2621 task->tk_action = call_encode; in call_decode()
2624 case -EKEYREJECTED: in call_decode()
2625 task->tk_action = call_reserve; in call_decode()
2628 /* Ensure we obtain a new XID if we retry! */ in call_decode()
2636 struct rpc_clnt *clnt = task->tk_client; in rpc_encode_header()
2637 struct rpc_rqst *req = task->tk_rqstp; in rpc_encode_header()
2641 error = -EMSGSIZE; in rpc_encode_header()
2643 if (!p) in rpc_encode_header()
2645 *p++ = req->rq_xid; in rpc_encode_header()
2648 *p++ = cpu_to_be32(clnt->cl_prog); in rpc_encode_header()
2649 *p++ = cpu_to_be32(clnt->cl_vers); in rpc_encode_header()
2650 *p = cpu_to_be32(task->tk_msg.rpc_proc->p_proc); in rpc_encode_header()
2653 if (error < 0) in rpc_encode_header()
2665 struct rpc_clnt *clnt = task->tk_client; in rpc_decode_header()
2669 /* RFC-1014 says that the representation of XDR data must be a in rpc_decode_header()
2671 * - if it isn't pointer subtraction in the NFS client may give in rpc_decode_header()
2674 if (task->tk_rqstp->rq_rcv_buf.len & 3) in rpc_decode_header()
2678 if (!p) in rpc_decode_header()
2681 if (*p++ != rpc_reply) in rpc_decode_header()
2683 if (*p++ != rpc_msg_accepted) in rpc_decode_header()
2687 if (error) in rpc_decode_header()
2691 if (!p) in rpc_decode_header()
2698 error = -EPFNOSUPPORT; in rpc_decode_header()
2702 error = -EPROTONOSUPPORT; in rpc_decode_header()
2706 error = -EOPNOTSUPP; in rpc_decode_header()
2711 error = -EIO; in rpc_decode_header()
2718 clnt->cl_stats->rpcgarbage++; in rpc_decode_header()
2719 if (task->tk_garb_retry) { in rpc_decode_header()
2720 task->tk_garb_retry--; in rpc_decode_header()
2721 task->tk_action = call_encode; in rpc_decode_header()
2722 return -EAGAIN; in rpc_decode_header()
2730 error = -EIO; in rpc_decode_header()
2736 case -EPROTONOSUPPORT: in rpc_decode_header()
2738 case -EACCES: in rpc_decode_header()
2739 /* Re-encode with a fresh cred */ in rpc_decode_header()
2746 error = -EACCES; in rpc_decode_header()
2748 if (!p) in rpc_decode_header()
2755 error = -EPROTONOSUPPORT; in rpc_decode_header()
2762 if (!p) in rpc_decode_header()
2770 if (!task->tk_cred_retry) in rpc_decode_header()
2772 task->tk_cred_retry--; in rpc_decode_header()
2774 return -EKEYREJECTED; in rpc_decode_header()
2778 if (!task->tk_garb_retry) in rpc_decode_header()
2780 task->tk_garb_retry--; in rpc_decode_header()
2782 task->tk_action = call_encode; in rpc_decode_header()
2783 return -EAGAIN; in rpc_decode_header()
2786 pr_warn("RPC: server %s requires stronger authentication.\n", in rpc_decode_header()
2787 task->tk_xprt->servername); in rpc_decode_header()
2818 task->tk_flags &= ~RPC_TASK_NO_RETRANS_TIMEOUT; in rpc_null_call_prepare()
2860 if (clnt->cl_auth->au_ops->ping) in rpc_ping()
2861 return clnt->cl_auth->au_ops->ping(clnt); in rpc_ping()
2864 if (IS_ERR(task)) in rpc_ping()
2866 status = task->tk_status; in rpc_ping()
2886 if (IS_ERR(task)) in rpc_ping_noreply()
2888 status = task->tk_status; in rpc_ping_noreply()
2902 if (task->tk_status == 0) in rpc_cb_add_xprt_done()
2903 rpc_xprt_switch_add_xprt(data->xps, data->xprt); in rpc_cb_add_xprt_done()
2910 xprt_put(data->xprt); in rpc_cb_add_xprt_release()
2911 xprt_switch_put(data->xps); in rpc_cb_add_xprt_release()
2922 * rpc_clnt_test_and_add_xprt - Test and add a new transport to a rpc_clnt
2934 int max_connect = clnt->cl_max_connect; in rpc_clnt_test_and_add_xprt()
2936 if (in_max_connect) in rpc_clnt_test_and_add_xprt()
2938 if (xps->xps_nunique_destaddr_xprts + 1 > max_connect) { in rpc_clnt_test_and_add_xprt()
2944 return -EINVAL; in rpc_clnt_test_and_add_xprt()
2948 if (!data) in rpc_clnt_test_and_add_xprt()
2949 return -ENOMEM; in rpc_clnt_test_and_add_xprt()
2950 data->xps = xprt_switch_get(xps); in rpc_clnt_test_and_add_xprt()
2951 data->xprt = xprt_get(xprt); in rpc_clnt_test_and_add_xprt()
2952 if (rpc_xprt_switch_has_addr(data->xps, (struct sockaddr *)&xprt->addr)) { in rpc_clnt_test_and_add_xprt()
2959 if (IS_ERR(task)) in rpc_clnt_test_and_add_xprt()
2962 data->xps->xps_nunique_destaddr_xprts++; in rpc_clnt_test_and_add_xprt()
2974 int status = -EADDRINUSE; in rpc_clnt_add_xprt_helper()
2978 if (IS_ERR(task)) in rpc_clnt_add_xprt_helper()
2981 status = task->tk_status; in rpc_clnt_add_xprt_helper()
2984 if (status < 0) in rpc_clnt_add_xprt_helper()
2988 data->add_xprt_test(clnt, xprt, data->data); in rpc_clnt_add_xprt_helper()
3016 int status = -EADDRINUSE; in rpc_clnt_setup_test_and_add_xprt()
3021 if (rpc_xprt_switch_has_addr(xps, (struct sockaddr *)&xprt->addr)) in rpc_clnt_setup_test_and_add_xprt()
3025 if (status < 0) in rpc_clnt_setup_test_and_add_xprt()
3032 if (status < 0) in rpc_clnt_setup_test_and_add_xprt()
3033 pr_info("RPC: rpc_clnt_test_xprt failed: %d addr %s not " in rpc_clnt_setup_test_and_add_xprt()
3035 xprt->address_strings[RPC_DISPLAY_ADDR]); in rpc_clnt_setup_test_and_add_xprt()
3042 * rpc_clnt_add_xprt - Add a new transport to a rpc_clnt
3050 * If ping is set, then test that connectivity succeeds before
3070 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in rpc_clnt_add_xprt()
3071 xprt = xprt_iter_xprt(&clnt->cl_xpi); in rpc_clnt_add_xprt()
3072 if (xps == NULL || xprt == NULL) { in rpc_clnt_add_xprt()
3075 return -EAGAIN; in rpc_clnt_add_xprt()
3077 resvport = xprt->resvport; in rpc_clnt_add_xprt()
3078 reuseport = xprt->reuseport; in rpc_clnt_add_xprt()
3079 connect_timeout = xprt->connect_timeout; in rpc_clnt_add_xprt()
3080 reconnect_timeout = xprt->max_reconnect_timeout; in rpc_clnt_add_xprt()
3081 ident = xprt->xprt_class->ident; in rpc_clnt_add_xprt()
3084 if (!xprtargs->ident) in rpc_clnt_add_xprt()
3085 xprtargs->ident = ident; in rpc_clnt_add_xprt()
3086 xprtargs->xprtsec = clnt->cl_xprtsec; in rpc_clnt_add_xprt()
3088 if (IS_ERR(xprt)) { in rpc_clnt_add_xprt()
3092 xprt->resvport = resvport; in rpc_clnt_add_xprt()
3093 xprt->reuseport = reuseport; in rpc_clnt_add_xprt()
3095 if (xprtargs->connect_timeout) in rpc_clnt_add_xprt()
3096 connect_timeout = xprtargs->connect_timeout; in rpc_clnt_add_xprt()
3097 if (xprtargs->reconnect_timeout) in rpc_clnt_add_xprt()
3098 reconnect_timeout = xprtargs->reconnect_timeout; in rpc_clnt_add_xprt()
3099 if (xprt->ops->set_connect_timeout != NULL) in rpc_clnt_add_xprt()
3100 xprt->ops->set_connect_timeout(xprt, in rpc_clnt_add_xprt()
3105 if (setup) { in rpc_clnt_add_xprt()
3107 if (ret != 0) in rpc_clnt_add_xprt()
3130 main_xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); in rpc_xprt_probe_trunked()
3131 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in rpc_xprt_probe_trunked()
3132 status = rpc_cmp_addr_port((struct sockaddr *)&xprt->addr, in rpc_xprt_probe_trunked()
3133 (struct sockaddr *)&main_xprt->addr); in rpc_xprt_probe_trunked()
3136 if (status || !test_bit(XPRT_OFFLINE, &xprt->state)) in rpc_xprt_probe_trunked()
3146 /* rpc_clnt_probe_trunked_xprt -- probe offlined transport for session trunking
3150 * the function rpc_xprt_probe_trunked() which will determine if this
3160 if (ret) in rpc_clnt_probe_trunked_xprts()
3165 if (!xprt) in rpc_clnt_probe_trunked_xprts()
3169 if (ret < 0) in rpc_clnt_probe_trunked_xprts()
3188 main_xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); in rpc_xprt_offline()
3189 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in rpc_xprt_offline()
3190 err = rpc_cmp_addr_port((struct sockaddr *)&xprt->addr, in rpc_xprt_offline()
3191 (struct sockaddr *)&main_xprt->addr); in rpc_xprt_offline()
3194 if (err) in rpc_xprt_offline()
3197 if (wait_on_bit_lock(&xprt->state, XPRT_LOCKED, TASK_KILLABLE)) { in rpc_xprt_offline()
3198 err = -EINTR; in rpc_xprt_offline()
3210 /* rpc_clnt_manage_trunked_xprts -- offline trunked transports
3235 if (xprt->ops->set_connect_timeout) in rpc_xprt_set_connect_timeout()
3236 xprt->ops->set_connect_timeout(xprt, in rpc_xprt_set_connect_timeout()
3237 timeo->connect_timeout, in rpc_xprt_set_connect_timeout()
3238 timeo->reconnect_timeout); in rpc_xprt_set_connect_timeout()
3260 xprt_switch_put(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in rpc_clnt_xprt_switch_put()
3270 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_clnt_xprt_set_online()
3277 if (rpc_clnt_xprt_switch_has_addr(clnt, in rpc_clnt_xprt_switch_add_xprt()
3278 (const struct sockaddr *)&xprt->addr)) { in rpc_clnt_xprt_switch_add_xprt()
3282 rpc_xprt_switch_add_xprt(rcu_dereference(clnt->cl_xpi.xpi_xpswitch), in rpc_clnt_xprt_switch_add_xprt()
3293 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_clnt_xprt_switch_remove_xprt()
3294 rpc_xprt_switch_remove_xprt(rcu_dereference(clnt->cl_xpi.xpi_xpswitch), in rpc_clnt_xprt_switch_remove_xprt()
3296 xps->xps_nunique_destaddr_xprts--; in rpc_clnt_xprt_switch_remove_xprt()
3308 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_clnt_xprt_switch_has_addr()
3315 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
3318 printk(KERN_INFO "-pid- flgs status -client- --rqstp- " in rpc_show_header()
3319 "-timeout ---ops--\n"); in rpc_show_header()
3327 if (RPC_IS_QUEUED(task)) in rpc_show_task()
3328 rpc_waitq = rpc_qname(task->tk_waitqueue); in rpc_show_task()
3331 task->tk_pid, task->tk_flags, task->tk_status, in rpc_show_task()
3332 clnt, task->tk_rqstp, rpc_task_timeout(task), task->tk_ops, in rpc_show_task()
3333 clnt->cl_program->name, clnt->cl_vers, rpc_proc_name(task), in rpc_show_task()
3334 task->tk_action, rpc_waitq); in rpc_show_task()
3344 spin_lock(&sn->rpc_client_lock); in rpc_show_tasks()
3345 list_for_each_entry(clnt, &sn->all_clients, cl_clients) { in rpc_show_tasks()
3346 spin_lock(&clnt->cl_lock); in rpc_show_tasks()
3347 list_for_each_entry(task, &clnt->cl_tasks, tk_task) { in rpc_show_tasks()
3348 if (!header) { in rpc_show_tasks()
3354 spin_unlock(&clnt->cl_lock); in rpc_show_tasks()
3356 spin_unlock(&sn->rpc_client_lock); in rpc_show_tasks()
3360 #if IS_ENABLED(CONFIG_SUNRPC_SWAP)
3372 while (clnt != clnt->cl_parent) in rpc_clnt_swap_activate()
3373 clnt = clnt->cl_parent; in rpc_clnt_swap_activate()
3374 if (atomic_inc_return(&clnt->cl_swapper) == 1) in rpc_clnt_swap_activate()
3393 while (clnt != clnt->cl_parent) in rpc_clnt_swap_deactivate()
3394 clnt = clnt->cl_parent; in rpc_clnt_swap_deactivate()
3395 if (atomic_dec_if_positive(&clnt->cl_swapper) == 0) in rpc_clnt_swap_deactivate()