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()
292 copied = strscpy(clnt->cl_nodename, in rpc_clnt_set_nodename()
293 nodename, sizeof(clnt->cl_nodename)); in rpc_clnt_set_nodename()
295 clnt->cl_nodelen = copied < 0 in rpc_clnt_set_nodename()
296 ? sizeof(clnt->cl_nodename) - 1 in rpc_clnt_set_nodename()
316 if (pipefs_sb) { in rpc_client_register()
318 if (err) in rpc_client_register()
323 if (pipefs_sb) in rpc_client_register()
327 if (IS_ERR(auth)) { in rpc_client_register()
328 dprintk("RPC: Couldn't create auth handle (flavor %u)\n", in rpc_client_register()
339 if (pipefs_sb) in rpc_client_register()
358 if (clid < 0) in rpc_alloc_clid()
360 clnt->cl_clid = clid; in rpc_alloc_clid()
366 ida_free(&rpc_clids, clnt->cl_clid); in rpc_free_clid()
374 const struct rpc_program *program = args->program; in rpc_new_client()
378 const char *nodename = args->nodename; in rpc_new_client()
382 if (err) in rpc_new_client()
385 err = -EINVAL; in rpc_new_client()
386 if (args->version >= program->nrvers) in rpc_new_client()
388 version = program->version[args->version]; in rpc_new_client()
389 if (version == NULL) in rpc_new_client()
392 err = -ENOMEM; in rpc_new_client()
394 if (!clnt) in rpc_new_client()
396 clnt->cl_parent = parent ? : clnt; in rpc_new_client()
397 clnt->cl_xprtsec = args->xprtsec; in rpc_new_client()
400 if (err) in rpc_new_client()
403 clnt->cl_cred = get_cred(args->cred); in rpc_new_client()
404 clnt->cl_procinfo = version->procs; in rpc_new_client()
405 clnt->cl_maxproc = version->nrprocs; in rpc_new_client()
406 clnt->cl_prog = args->prognumber ? : program->number; in rpc_new_client()
407 clnt->cl_vers = version->number; in rpc_new_client()
408 clnt->cl_stats = program->stats; in rpc_new_client()
409 clnt->cl_metrics = rpc_alloc_iostats(clnt); in rpc_new_client()
410 rpc_init_pipe_dir_head(&clnt->cl_pipedir_objects); in rpc_new_client()
411 err = -ENOMEM; in rpc_new_client()
412 if (clnt->cl_metrics == NULL) in rpc_new_client()
414 clnt->cl_program = program; in rpc_new_client()
415 INIT_LIST_HEAD(&clnt->cl_tasks); in rpc_new_client()
416 spin_lock_init(&clnt->cl_lock); in rpc_new_client()
418 timeout = xprt->timeout; in rpc_new_client()
419 if (args->timeout != NULL) { in rpc_new_client()
420 memcpy(&clnt->cl_timeout_default, args->timeout, in rpc_new_client()
421 sizeof(clnt->cl_timeout_default)); in rpc_new_client()
422 timeout = &clnt->cl_timeout_default; in rpc_new_client()
426 xprt->main = true; in rpc_new_client()
427 xprt_iter_init(&clnt->cl_xpi, xps); in rpc_new_client()
430 clnt->cl_rtt = &clnt->cl_rtt_default; in rpc_new_client()
431 rpc_init_rtt(&clnt->cl_rtt_default, clnt->cl_timeout->to_initval); in rpc_new_client()
433 refcount_set(&clnt->cl_count, 1); in rpc_new_client()
435 if (nodename == NULL) in rpc_new_client()
436 nodename = utsname()->nodename; in rpc_new_client()
441 err = rpc_client_register(clnt, args->authflavor, args->client_name); in rpc_new_client()
442 if (err) in rpc_new_client()
444 if (parent) in rpc_new_client()
445 refcount_inc(&parent->cl_count); in rpc_new_client()
451 rpc_free_iostats(clnt->cl_metrics); in rpc_new_client()
453 put_cred(clnt->cl_cred); in rpc_new_client()
462 trace_rpc_clnt_new_err(program->name, args->servername, err); in rpc_new_client()
472 if (args->bc_xprt && args->bc_xprt->xpt_bc_xps) { in rpc_create_xprt()
473 WARN_ON_ONCE(!(args->protocol & XPRT_TRANSPORT_BC)); in rpc_create_xprt()
474 xps = args->bc_xprt->xpt_bc_xps; in rpc_create_xprt()
478 if (xps == NULL) { in rpc_create_xprt()
480 return ERR_PTR(-ENOMEM); in rpc_create_xprt()
482 if (xprt->bc_xprt) { in rpc_create_xprt()
484 xprt->bc_xprt->xpt_bc_xps = xps; in rpc_create_xprt()
488 if (IS_ERR(clnt)) in rpc_create_xprt()
491 if (!(args->flags & RPC_CLNT_CREATE_NOPING)) { in rpc_create_xprt()
493 if (err != 0) { in rpc_create_xprt()
497 } else if (args->flags & RPC_CLNT_CREATE_CONNECTED) { in rpc_create_xprt()
499 if (err != 0) { in rpc_create_xprt()
505 clnt->cl_softrtry = 1; in rpc_create_xprt()
506 if (args->flags & (RPC_CLNT_CREATE_HARDRTRY|RPC_CLNT_CREATE_SOFTERR)) { in rpc_create_xprt()
507 clnt->cl_softrtry = 0; in rpc_create_xprt()
508 if (args->flags & RPC_CLNT_CREATE_SOFTERR) in rpc_create_xprt()
509 clnt->cl_softerr = 1; in rpc_create_xprt()
512 if (args->flags & RPC_CLNT_CREATE_AUTOBIND) in rpc_create_xprt()
513 clnt->cl_autobind = 1; in rpc_create_xprt()
514 if (args->flags & RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT) in rpc_create_xprt()
515 clnt->cl_noretranstimeo = 1; in rpc_create_xprt()
516 if (args->flags & RPC_CLNT_CREATE_DISCRTRY) in rpc_create_xprt()
517 clnt->cl_discrtry = 1; in rpc_create_xprt()
518 if (!(args->flags & RPC_CLNT_CREATE_QUIET)) in rpc_create_xprt()
519 clnt->cl_chatty = 1; in rpc_create_xprt()
525 * rpc_create - create an RPC client and transport with one call
528 * Creates and initializes an RPC transport and an RPC client.
530 * It can ping the server in order to determine if it is up, and to see if
538 .net = args->net, in rpc_create()
539 .ident = args->protocol, in rpc_create()
540 .srcaddr = args->saddress, in rpc_create()
541 .dstaddr = args->address, in rpc_create()
542 .addrlen = args->addrsize, in rpc_create()
543 .servername = args->servername, in rpc_create()
544 .bc_xprt = args->bc_xprt, in rpc_create()
545 .xprtsec = args->xprtsec, in rpc_create()
546 .connect_timeout = args->connect_timeout, in rpc_create()
547 .reconnect_timeout = args->reconnect_timeout, in rpc_create()
553 if (args->bc_xprt) { in rpc_create()
554 WARN_ON_ONCE(!(args->protocol & XPRT_TRANSPORT_BC)); in rpc_create()
555 xprt = args->bc_xprt->xpt_bc_xprt; in rpc_create()
556 if (xprt) { in rpc_create()
562 if (args->flags & RPC_CLNT_CREATE_INFINITE_SLOTS) in rpc_create()
564 if (args->flags & RPC_CLNT_CREATE_NO_IDLE_TIMEOUT) in rpc_create()
567 * If the caller chooses not to specify a hostname, whip in rpc_create()
568 * up a string representation of the passed-in address. in rpc_create()
570 if (xprtargs.servername == NULL) { in rpc_create()
572 (struct sockaddr_un *)args->address; in rpc_create()
574 (struct sockaddr_in *)args->address; in rpc_create()
576 (struct sockaddr_in6 *)args->address; in rpc_create()
579 switch (args->address->sa_family) { in rpc_create()
581 if (sun->sun_path[0]) in rpc_create()
583 sun->sun_path); in rpc_create()
586 sun->sun_path+1); in rpc_create()
590 &sin->sin_addr.s_addr); in rpc_create()
594 &sin6->sin6_addr); in rpc_create()
599 return ERR_PTR(-EINVAL); in rpc_create()
605 if (IS_ERR(xprt)) in rpc_create()
609 * By default, kernel RPC client connects from a reserved port. in rpc_create()
614 xprt->resvport = 1; in rpc_create()
615 if (args->flags & RPC_CLNT_CREATE_NONPRIVPORT) in rpc_create()
616 xprt->resvport = 0; in rpc_create()
617 xprt->reuseport = 0; in rpc_create()
618 if (args->flags & RPC_CLNT_CREATE_REUSEPORT) in rpc_create()
619 xprt->reuseport = 1; in rpc_create()
622 if (IS_ERR(clnt) || args->nconnect <= 1) in rpc_create()
625 for (i = 0; i < args->nconnect - 1; i++) { in rpc_create()
626 if (rpc_clnt_add_xprt(clnt, &xprtargs, NULL, NULL) < 0) in rpc_create()
634 * This function clones the RPC client structure. It allows us to share the
646 err = -ENOMEM; in __rpc_clone_client()
648 xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); in __rpc_clone_client()
649 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in __rpc_clone_client()
651 if (xprt == NULL || xps == NULL) { in __rpc_clone_client()
656 args->servername = xprt->servername; in __rpc_clone_client()
657 args->nodename = clnt->cl_nodename; in __rpc_clone_client()
660 if (IS_ERR(new)) in __rpc_clone_client()
664 new->cl_autobind = 0; in __rpc_clone_client()
665 new->cl_softrtry = clnt->cl_softrtry; in __rpc_clone_client()
666 new->cl_softerr = clnt->cl_softerr; in __rpc_clone_client()
667 new->cl_noretranstimeo = clnt->cl_noretranstimeo; in __rpc_clone_client()
668 new->cl_discrtry = clnt->cl_discrtry; in __rpc_clone_client()
669 new->cl_chatty = clnt->cl_chatty; in __rpc_clone_client()
670 new->cl_principal = clnt->cl_principal; in __rpc_clone_client()
671 new->cl_max_connect = clnt->cl_max_connect; in __rpc_clone_client()
680 * rpc_clone_client - Clone an RPC client structure
682 * @clnt: RPC client whose parameters are copied
684 * Returns a fresh RPC client or an ERR_PTR.
689 .program = clnt->cl_program, in rpc_clone_client()
690 .prognumber = clnt->cl_prog, in rpc_clone_client()
691 .version = clnt->cl_vers, in rpc_clone_client()
692 .authflavor = clnt->cl_auth->au_flavor, in rpc_clone_client()
693 .cred = clnt->cl_cred, in rpc_clone_client()
700 * rpc_clone_client_set_auth - Clone an RPC client structure and set its auth
702 * @clnt: RPC client whose parameters are copied
705 * Returns a fresh RPC client or an ERR_PTR.
711 .program = clnt->cl_program, in rpc_clone_client_set_auth()
712 .prognumber = clnt->cl_prog, in rpc_clone_client_set_auth()
713 .version = clnt->cl_vers, in rpc_clone_client_set_auth()
715 .cred = clnt->cl_cred, in rpc_clone_client_set_auth()
722 * rpc_switch_client_transport: switch the RPC transport on the fly
727 * This function allows the caller to switch the RPC transport for the
730 * there are no active RPC tasks by using some form of locking.
732 * Returns zero if "clnt" is now using the new xprt. Otherwise a
747 args->xprtsec = clnt->cl_xprtsec; in rpc_switch_client_transport()
749 if (IS_ERR(xprt)) in rpc_switch_client_transport()
753 if (xps == NULL) { in rpc_switch_client_transport()
755 return -ENOMEM; in rpc_switch_client_transport()
758 pseudoflavor = clnt->cl_auth->au_flavor; in rpc_switch_client_transport()
760 old_timeo = clnt->cl_timeout; in rpc_switch_client_transport()
762 oldxps = xprt_iter_xchg_switch(&clnt->cl_xpi, xps); in rpc_switch_client_transport()
772 * children, if it has any, still point to the old xprt. in rpc_switch_client_transport()
774 parent = clnt->cl_parent; in rpc_switch_client_transport()
775 clnt->cl_parent = clnt; in rpc_switch_client_transport()
778 * The old rpc_auth cache cannot be re-used. GSS in rpc_switch_client_transport()
783 if (err) in rpc_switch_client_transport()
787 if (parent != clnt) in rpc_switch_client_transport()
795 xps = xprt_iter_xchg_switch(&clnt->cl_xpi, oldxps); in rpc_switch_client_transport()
797 clnt->cl_parent = parent; in rpc_switch_client_transport()
811 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in rpc_clnt_xprt_switch_get()
824 if (xps == NULL) in _rpc_clnt_xprt_iter_init()
825 return -EAGAIN; in _rpc_clnt_xprt_iter_init()
845 * rpc_clnt_iterate_for_each_xprt - Apply a function to all transports
850 * Iterates through the list of RPC transports currently attached to the
863 if (ret) in rpc_clnt_iterate_for_each_xprt()
868 if (!xprt) in rpc_clnt_iterate_for_each_xprt()
872 if (ret < 0) in rpc_clnt_iterate_for_each_xprt()
889 if (list_empty(&clnt->cl_tasks)) in rpc_killall_tasks()
896 spin_lock(&clnt->cl_lock); in rpc_killall_tasks()
897 list_for_each_entry(rovr, &clnt->cl_tasks, tk_task) in rpc_killall_tasks()
899 spin_unlock(&clnt->cl_lock); in rpc_killall_tasks()
904 * rpc_cancel_tasks - try to cancel a set of RPC tasks
905 * @clnt: Pointer to RPC client
906 * @error: RPC task error value to set
910 * Uses @fnmatch to define a set of RPC tasks that are to be cancelled.
921 if (list_empty(&clnt->cl_tasks)) in rpc_cancel_tasks()
926 spin_lock(&clnt->cl_lock); in rpc_cancel_tasks()
927 list_for_each_entry(task, &clnt->cl_tasks, tk_task) { in rpc_cancel_tasks()
928 if (!RPC_IS_ACTIVATED(task)) in rpc_cancel_tasks()
930 if (!fnmatch(task, data)) in rpc_cancel_tasks()
935 spin_unlock(&clnt->cl_lock); in rpc_cancel_tasks()
943 if (xprt_connected(xprt)) in rpc_clnt_disconnect_xprt()
955 * Properly shut down an RPC client, terminating all outstanding
964 while (!list_empty(&clnt->cl_tasks)) { in rpc_shutdown_client()
967 list_empty(&clnt->cl_tasks), 1*HZ); in rpc_shutdown_client()
975 * Free an RPC client
991 xprt_put(rcu_dereference_raw(clnt->cl_xprt)); in rpc_free_client_work()
1002 if (clnt->cl_parent != clnt) in rpc_free_client()
1003 parent = clnt->cl_parent; in rpc_free_client()
1005 rpc_free_iostats(clnt->cl_metrics); in rpc_free_client()
1006 clnt->cl_metrics = NULL; in rpc_free_client()
1007 xprt_iter_destroy(&clnt->cl_xpi); in rpc_free_client()
1008 put_cred(clnt->cl_cred); in rpc_free_client()
1010 INIT_WORK(&clnt->cl_work, rpc_free_client_work); in rpc_free_client()
1011 schedule_work(&clnt->cl_work); in rpc_free_client()
1016 * Free an RPC client
1022 * Note: RPCSEC_GSS may need to send NULL RPC calls in order to in rpc_free_auth()
1026 if (clnt->cl_auth != NULL) { in rpc_free_auth()
1027 rpcauth_release(clnt->cl_auth); in rpc_free_auth()
1028 clnt->cl_auth = NULL; in rpc_free_auth()
1030 if (refcount_dec_and_test(&clnt->cl_count)) in rpc_free_auth()
1036 * Release reference to the RPC client
1042 if (list_empty(&clnt->cl_tasks)) in rpc_release_client()
1044 if (refcount_dec_not_one(&clnt->cl_count)) in rpc_release_client()
1052 * rpc_bind_new_program - bind a new RPC program to an existing client
1054 * @program: rpc program to set
1055 * @vers: rpc program version
1057 * Clones the rpc client and sets up a new RPC program. This is mainly
1058 * of use for enabling different RPC programs to share the same transport.
1067 .prognumber = program->number, in rpc_bind_new_program()
1069 .authflavor = old->cl_auth->au_flavor, in rpc_bind_new_program()
1070 .cred = old->cl_cred, in rpc_bind_new_program()
1076 if (IS_ERR(clnt)) in rpc_bind_new_program()
1079 if (err != 0) { in rpc_bind_new_program()
1093 if (!xprt) in rpc_task_get_xprt()
1096 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_task_get_xprt()
1097 atomic_long_inc(&xps->xps_queuelen); in rpc_task_get_xprt()
1099 atomic_long_inc(&xprt->queuelen); in rpc_task_get_xprt()
1109 atomic_long_dec(&xprt->queuelen); in rpc_task_release_xprt()
1111 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_task_release_xprt()
1112 atomic_long_dec(&xps->xps_queuelen); in rpc_task_release_xprt()
1120 struct rpc_xprt *xprt = task->tk_xprt; in rpc_task_release_transport()
1122 if (xprt) { in rpc_task_release_transport()
1123 task->tk_xprt = NULL; in rpc_task_release_transport()
1124 if (task->tk_client) in rpc_task_release_transport()
1125 rpc_task_release_xprt(task->tk_client, xprt); in rpc_task_release_transport()
1134 struct rpc_clnt *clnt = task->tk_client; in rpc_task_release_client()
1137 if (clnt != NULL) { in rpc_task_release_client()
1139 spin_lock(&clnt->cl_lock); in rpc_task_release_client()
1140 list_del(&task->tk_task); in rpc_task_release_client()
1141 spin_unlock(&clnt->cl_lock); in rpc_task_release_client()
1142 task->tk_client = NULL; in rpc_task_release_client()
1154 xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); in rpc_task_get_first_xprt()
1162 return rpc_task_get_xprt(clnt, xprt_iter_get_next(&clnt->cl_xpi)); in rpc_task_get_next_xprt()
1168 if (task->tk_xprt) { in rpc_task_set_transport()
1169 if (!(test_bit(XPRT_OFFLINE, &task->tk_xprt->state) && in rpc_task_set_transport()
1170 (task->tk_flags & RPC_TASK_MOVEABLE))) in rpc_task_set_transport()
1173 xprt_put(task->tk_xprt); in rpc_task_set_transport()
1175 if (task->tk_flags & RPC_TASK_NO_ROUND_ROBIN) in rpc_task_set_transport()
1176 task->tk_xprt = rpc_task_get_first_xprt(clnt); in rpc_task_set_transport()
1178 task->tk_xprt = rpc_task_get_next_xprt(clnt); in rpc_task_set_transport()
1185 task->tk_client = clnt; in rpc_task_set_client()
1186 refcount_inc(&clnt->cl_count); in rpc_task_set_client()
1187 if (clnt->cl_softrtry) in rpc_task_set_client()
1188 task->tk_flags |= RPC_TASK_SOFT; in rpc_task_set_client()
1189 if (clnt->cl_softerr) in rpc_task_set_client()
1190 task->tk_flags |= RPC_TASK_TIMEOUT; in rpc_task_set_client()
1191 if (clnt->cl_noretranstimeo) in rpc_task_set_client()
1192 task->tk_flags |= RPC_TASK_NO_RETRANS_TIMEOUT; in rpc_task_set_client()
1194 spin_lock(&clnt->cl_lock); in rpc_task_set_client()
1195 list_add_tail(&task->tk_task, &clnt->cl_tasks); in rpc_task_set_client()
1196 spin_unlock(&clnt->cl_lock); in rpc_task_set_client()
1202 if (msg != NULL) { in rpc_task_set_rpc_message()
1203 task->tk_msg.rpc_proc = msg->rpc_proc; in rpc_task_set_rpc_message()
1204 task->tk_msg.rpc_argp = msg->rpc_argp; in rpc_task_set_rpc_message()
1205 task->tk_msg.rpc_resp = msg->rpc_resp; in rpc_task_set_rpc_message()
1206 task->tk_msg.rpc_cred = msg->rpc_cred; in rpc_task_set_rpc_message()
1207 if (!(task->tk_flags & RPC_TASK_CRED_NOREF)) in rpc_task_set_rpc_message()
1208 get_cred(task->tk_msg.rpc_cred); in rpc_task_set_rpc_message()
1213 * Default callback for async RPC calls
1225 * rpc_run_task - Allocate a new RPC task, then run rpc_execute against it
1233 if (IS_ERR(task)) in rpc_run_task()
1236 if (!RPC_IS_ASYNC(task)) in rpc_run_task()
1237 task->tk_flags |= RPC_TASK_CRED_NOREF; in rpc_run_task()
1239 rpc_task_set_client(task, task_setup_data->rpc_client); in rpc_run_task()
1240 rpc_task_set_rpc_message(task, task_setup_data->rpc_message); in rpc_run_task()
1242 if (task->tk_action == NULL) in rpc_run_task()
1245 atomic_inc(&task->tk_count); in rpc_run_task()
1252 * rpc_call_sync - Perform a synchronous RPC call
1253 * @clnt: pointer to RPC client
1254 * @msg: RPC call parameters
1255 * @flags: RPC call flags
1269 if (flags & RPC_TASK_ASYNC) { in rpc_call_sync()
1272 return -EINVAL; in rpc_call_sync()
1276 if (IS_ERR(task)) in rpc_call_sync()
1278 status = task->tk_status; in rpc_call_sync()
1285 * rpc_call_async - Perform an asynchronous RPC call
1286 * @clnt: pointer to RPC client
1287 * @msg: RPC call parameters
1288 * @flags: RPC call flags
1289 * @tk_ops: RPC call ops
1306 if (IS_ERR(task)) in rpc_call_async()
1313 #if defined(CONFIG_SUNRPC_BACKCHANNEL)
1317 * rpc_run_bc_task - Allocate a new RPC task for backchannel use, then run
1319 * @req: RPC request
1332 dprintk("RPC: rpc_run_bc_task req= %p\n", req); in rpc_run_bc_task()
1337 if (IS_ERR(task)) { in rpc_run_bc_task()
1344 task->tk_action = call_bc_encode; in rpc_run_bc_task()
1345 atomic_inc(&task->tk_count); in rpc_run_bc_task()
1346 WARN_ON_ONCE(atomic_read(&task->tk_count) != 2); in rpc_run_bc_task()
1349 dprintk("RPC: rpc_run_bc_task: task= %p\n", task); in rpc_run_bc_task()
1355 * rpc_prepare_reply_pages - Prepare to receive a reply data payload into pages
1356 * @req: RPC request to prepare
1367 hdrsize += RPC_REPHDRSIZE + req->rq_cred->cr_auth->au_ralign; in rpc_prepare_reply_pages()
1369 xdr_inline_pages(&req->rq_rcv_buf, hdrsize << 2, pages, base, len); in rpc_prepare_reply_pages()
1370 trace_rpc_xdr_reply_pages(req->rq_task, &req->rq_rcv_buf); in rpc_prepare_reply_pages()
1377 task->tk_action = call_start; in rpc_call_start()
1382 * rpc_peeraddr - extract remote peer address from clnt's xprt
1383 * @clnt: RPC client structure
1395 xprt = rcu_dereference(clnt->cl_xprt); in rpc_peeraddr()
1397 bytes = xprt->addrlen; in rpc_peeraddr()
1398 if (bytes > bufsize) in rpc_peeraddr()
1400 memcpy(buf, &xprt->addr, bytes); in rpc_peeraddr()
1408 * rpc_peeraddr2str - return remote peer address in printable format
1409 * @clnt: RPC client structure
1421 xprt = rcu_dereference(clnt->cl_xprt); in rpc_peeraddr2str()
1423 if (xprt->address_strings[format] != NULL) in rpc_peeraddr2str()
1424 return xprt->address_strings[format]; in rpc_peeraddr2str()
1445 * Returns zero and fills in "buf" if successful; otherwise, a
1454 err = __sock_create(net, sap->sa_family, in rpc_sockname()
1456 if (err < 0) { in rpc_sockname()
1457 dprintk("RPC: can't create UDP socket (%d)\n", err); in rpc_sockname()
1461 switch (sap->sa_family) { in rpc_sockname()
1473 err = -EAFNOSUPPORT; in rpc_sockname()
1476 if (err < 0) { in rpc_sockname()
1477 dprintk("RPC: can't bind UDP socket (%d)\n", err); in rpc_sockname()
1482 if (err < 0) { in rpc_sockname()
1483 dprintk("RPC: can't connect UDP socket (%d)\n", err); in rpc_sockname()
1488 if (err < 0) { in rpc_sockname()
1489 dprintk("RPC: getsockname failed (%d)\n", err); in rpc_sockname()
1494 if (buf->sa_family == AF_INET6) { in rpc_sockname()
1496 sin6->sin6_scope_id = 0; in rpc_sockname()
1498 dprintk("RPC: %s succeeded\n", __func__); in rpc_sockname()
1511 * Returns zero and fills in "buf" if successful; otherwise, a
1518 if (buflen < sizeof(rpc_inaddr_loopback)) in rpc_anyaddr()
1519 return -EINVAL; in rpc_anyaddr()
1524 if (buflen < sizeof(rpc_in6addr_loopback)) in rpc_anyaddr()
1525 return -EINVAL; in rpc_anyaddr()
1530 dprintk("RPC: %s: address family not supported\n", in rpc_anyaddr()
1532 return -EAFNOSUPPORT; in rpc_anyaddr()
1534 dprintk("RPC: %s: succeeded\n", __func__); in rpc_anyaddr()
1539 * rpc_localaddr - discover local endpoint address for an RPC client
1540 * @clnt: RPC client structure
1544 * Returns zero and fills in "buf" and "buflen" if successful;
1547 * This works even if the underlying transport is not currently connected,
1548 * or if the upper layer never previously provided a source address.
1564 xprt = rcu_dereference(clnt->cl_xprt); in rpc_localaddr()
1565 salen = xprt->addrlen; in rpc_localaddr()
1566 memcpy(sap, &xprt->addr, salen); in rpc_localaddr()
1567 net = get_net(xprt->xprt_net); in rpc_localaddr()
1573 if (err != 0) in rpc_localaddr()
1575 return rpc_anyaddr(sap->sa_family, buf, buflen); in rpc_localaddr()
1586 xprt = rcu_dereference(clnt->cl_xprt); in rpc_setbufsize()
1587 if (xprt->ops->set_buffer_size) in rpc_setbufsize()
1588 xprt->ops->set_buffer_size(xprt, sndsize, rcvsize); in rpc_setbufsize()
1594 * rpc_net_ns - Get the network namespace for this RPC client
1595 * @clnt: RPC client to query
1603 ret = rcu_dereference(clnt->cl_xprt)->xprt_net; in rpc_net_ns()
1610 * rpc_max_payload - Get maximum payload size for a transport, in bytes
1611 * @clnt: RPC client to query
1613 * For stream transports, this is one RPC record fragment (see RFC
1614 * 1831), as we don't support multi-record requests yet. For datagram
1616 * RPC header sizes.
1623 ret = rcu_dereference(clnt->cl_xprt)->max_payload; in rpc_max_payload()
1630 * rpc_max_bc_payload - Get maximum backchannel payload size, in bytes
1631 * @clnt: RPC client to query
1639 xprt = rcu_dereference(clnt->cl_xprt); in rpc_max_bc_payload()
1640 ret = xprt->ops->bc_maxpayload(xprt); in rpc_max_bc_payload()
1652 xprt = rcu_dereference(clnt->cl_xprt); in rpc_num_bc_slots()
1653 ret = xprt->ops->bc_num_slots(xprt); in rpc_num_bc_slots()
1660 * rpc_force_rebind - force transport to check that remote port is unchanged
1666 if (clnt->cl_autobind) { in rpc_force_rebind()
1668 xprt_clear_bound(rcu_dereference(clnt->cl_xprt)); in rpc_force_rebind()
1677 task->tk_status = 0; in __rpc_restart_call()
1678 task->tk_rpc_status = 0; in __rpc_restart_call()
1679 task->tk_action = action; in __rpc_restart_call()
1684 * Restart an (async) RPC call. Usually called from within the
1695 * Restart an (async) RPC call from the call_prepare state.
1701 if (task->tk_ops->rpc_call_prepare != NULL) in rpc_restart_call_prepare()
1710 const struct rpc_procinfo *proc = task->tk_msg.rpc_proc; in rpc_proc_name()
1712 if (proc) { in rpc_proc_name()
1713 if (proc->p_name) in rpc_proc_name()
1714 return proc->p_name; in rpc_proc_name()
1739 * this state is visited exactly once for each RPC.
1744 struct rpc_clnt *clnt = task->tk_client; in call_start()
1745 int idx = task->tk_msg.rpc_proc->p_statidx; in call_start()
1749 if (task->tk_client->cl_shutdown) { in call_start()
1750 rpc_call_rpcerror(task, -EIO); in call_start()
1755 if (clnt->cl_program->version[clnt->cl_vers]) in call_start()
1756 clnt->cl_program->version[clnt->cl_vers]->counts[idx]++; in call_start()
1757 clnt->cl_stats->rpccnt++; in call_start()
1758 task->tk_action = call_reserve; in call_start()
1763 * 1. Reserve an RPC call slot
1768 task->tk_status = 0; in call_reserve()
1769 task->tk_action = call_reserveresult; in call_reserve()
1781 int status = task->tk_status; in call_reserveresult()
1787 task->tk_status = 0; in call_reserveresult()
1788 if (status >= 0) { in call_reserveresult()
1789 if (task->tk_rqstp) { in call_reserveresult()
1790 task->tk_action = call_refresh; in call_reserveresult()
1794 rpc_call_rpcerror(task, -EIO); in call_reserveresult()
1799 case -ENOMEM: in call_reserveresult()
1802 case -EAGAIN: /* woken up; retry */ in call_reserveresult()
1803 task->tk_action = call_retry_reserve; in call_reserveresult()
1811 * 1c. Retry reserving an RPC call slot
1816 task->tk_status = 0; in call_retry_reserve()
1817 task->tk_action = call_reserveresult; in call_retry_reserve()
1827 task->tk_action = call_refreshresult; in call_refresh()
1828 task->tk_status = 0; in call_refresh()
1829 task->tk_client->cl_stats->rpcauthrefresh++; in call_refresh()
1839 int status = task->tk_status; in call_refreshresult()
1841 task->tk_status = 0; in call_refreshresult()
1842 task->tk_action = call_refresh; in call_refreshresult()
1845 if (rpcauth_uptodatecred(task)) { in call_refreshresult()
1846 task->tk_action = call_allocate; in call_refreshresult()
1849 /* Use rate-limiting and a max number of retries if refresh in call_refreshresult()
1853 case -ETIMEDOUT: in call_refreshresult()
1856 case -EAGAIN: in call_refreshresult()
1857 status = -EACCES; in call_refreshresult()
1859 case -EKEYEXPIRED: in call_refreshresult()
1860 if (!task->tk_cred_retry) in call_refreshresult()
1862 task->tk_cred_retry--; in call_refreshresult()
1865 case -ENOMEM: in call_refreshresult()
1880 const struct rpc_auth *auth = task->tk_rqstp->rq_cred->cr_auth; in call_allocate()
1881 struct rpc_rqst *req = task->tk_rqstp; in call_allocate()
1882 struct rpc_xprt *xprt = req->rq_xprt; in call_allocate()
1883 const struct rpc_procinfo *proc = task->tk_msg.rpc_proc; in call_allocate()
1886 task->tk_status = 0; in call_allocate()
1887 task->tk_action = call_encode; in call_allocate()
1889 if (req->rq_buffer) in call_allocate()
1892 if (proc->p_proc != 0) { in call_allocate()
1893 BUG_ON(proc->p_arglen == 0); in call_allocate()
1894 if (proc->p_decode != NULL) in call_allocate()
1895 BUG_ON(proc->p_replen == 0); in call_allocate()
1899 * Calculate the size (in quads) of the RPC call in call_allocate()
1903 req->rq_callsize = RPC_CALLHDRSIZE + (auth->au_cslack << 1) + in call_allocate()
1904 proc->p_arglen; in call_allocate()
1905 req->rq_callsize <<= 2; in call_allocate()
1910 req->rq_rcvsize = RPC_REPHDRSIZE + auth->au_rslack + \ in call_allocate()
1911 max_t(size_t, proc->p_replen, 2); in call_allocate()
1912 req->rq_rcvsize <<= 2; in call_allocate()
1914 status = xprt->ops->buf_alloc(task); in call_allocate()
1916 if (status == 0) in call_allocate()
1918 if (status != -ENOMEM) { in call_allocate()
1923 if (RPC_IS_ASYNC(task) || !fatal_signal_pending(current)) { in call_allocate()
1924 task->tk_action = call_allocate; in call_allocate()
1929 rpc_call_rpcerror(task, -ERESTARTSYS); in call_allocate()
1935 return test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate) == 0 && in rpc_task_need_encode()
1936 (!(task->tk_flags & RPC_TASK_SENT) || in rpc_task_need_encode()
1937 !(task->tk_flags & RPC_TASK_NO_RETRANS_TIMEOUT) || in rpc_task_need_encode()
1944 struct rpc_rqst *req = task->tk_rqstp; in rpc_xdr_encode()
1947 xdr_buf_init(&req->rq_snd_buf, in rpc_xdr_encode()
1948 req->rq_buffer, in rpc_xdr_encode()
1949 req->rq_callsize); in rpc_xdr_encode()
1950 xdr_buf_init(&req->rq_rcv_buf, in rpc_xdr_encode()
1951 req->rq_rbuffer, in rpc_xdr_encode()
1952 req->rq_rcvsize); in rpc_xdr_encode()
1954 req->rq_reply_bytes_recvd = 0; in rpc_xdr_encode()
1955 req->rq_snd_buf.head[0].iov_len = 0; in rpc_xdr_encode()
1956 xdr_init_encode(&xdr, &req->rq_snd_buf, in rpc_xdr_encode()
1957 req->rq_snd_buf.head[0].iov_base, req); in rpc_xdr_encode()
1958 if (rpc_encode_header(task, &xdr)) in rpc_xdr_encode()
1961 task->tk_status = rpcauth_wrap_req(task, &xdr); in rpc_xdr_encode()
1965 * 3. Encode arguments of an RPC call
1970 if (!rpc_task_need_encode(task)) in call_encode()
1978 if (task->tk_status == 0 && rpc_reply_expected(task)) in call_encode()
1979 task->tk_status = xprt_request_enqueue_receive(task); in call_encode()
1981 if (task->tk_status != 0) { in call_encode()
1983 switch (task->tk_status) { in call_encode()
1984 case -EAGAIN: in call_encode()
1985 case -ENOMEM: in call_encode()
1988 case -EKEYEXPIRED: in call_encode()
1989 if (!task->tk_cred_retry) { in call_encode()
1990 rpc_call_rpcerror(task, task->tk_status); in call_encode()
1992 task->tk_action = call_refresh; in call_encode()
1993 task->tk_cred_retry--; in call_encode()
1998 rpc_call_rpcerror(task, task->tk_status); in call_encode()
2005 task->tk_action = call_transmit; in call_encode()
2007 if (!xprt_bound(task->tk_xprt)) in call_encode()
2008 task->tk_action = call_bind; in call_encode()
2009 else if (!xprt_connected(task->tk_xprt)) in call_encode()
2010 task->tk_action = call_connect; in call_encode()
2014 * Helpers to check if the task was already transmitted, and
2020 return !test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate); in rpc_task_transmitted()
2027 task->tk_action = call_transmit_status; in rpc_task_handle_transmitted()
2031 * 4. Get the server port number if not yet set
2036 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_bind()
2038 if (rpc_task_transmitted(task)) { in call_bind()
2043 if (xprt_bound(xprt)) { in call_bind()
2044 task->tk_action = call_connect; in call_bind()
2048 task->tk_action = call_bind_status; in call_bind()
2049 if (!xprt_prepare_transmit(task)) in call_bind()
2052 xprt->ops->rpcbind(task); in call_bind()
2061 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_bind_status()
2062 int status = -EIO; in call_bind_status()
2064 if (rpc_task_transmitted(task)) { in call_bind_status()
2069 if (task->tk_status >= 0) in call_bind_status()
2071 if (xprt_bound(xprt)) { in call_bind_status()
2072 task->tk_status = 0; in call_bind_status()
2076 switch (task->tk_status) { in call_bind_status()
2077 case -ENOMEM: in call_bind_status()
2080 case -EACCES: in call_bind_status()
2082 /* fail immediately if this is an RPC ping */ in call_bind_status()
2083 if (task->tk_msg.rpc_proc->p_proc == 0) { in call_bind_status()
2084 status = -EOPNOTSUPP; in call_bind_status()
2089 case -ENOBUFS: in call_bind_status()
2092 case -EAGAIN: in call_bind_status()
2094 case -ETIMEDOUT: in call_bind_status()
2097 case -EPFNOSUPPORT: in call_bind_status()
2101 case -EPROTONOSUPPORT: in call_bind_status()
2104 case -ECONNREFUSED: /* connection problems */ in call_bind_status()
2105 case -ECONNRESET: in call_bind_status()
2106 case -ECONNABORTED: in call_bind_status()
2107 case -ENOTCONN: in call_bind_status()
2108 case -EHOSTDOWN: in call_bind_status()
2109 case -ENETDOWN: in call_bind_status()
2110 case -EHOSTUNREACH: in call_bind_status()
2111 case -ENETUNREACH: in call_bind_status()
2112 case -EPIPE: in call_bind_status()
2114 if (!RPC_IS_SOFTCONN(task)) { in call_bind_status()
2118 status = task->tk_status; in call_bind_status()
2127 task->tk_action = call_connect; in call_bind_status()
2130 task->tk_status = 0; in call_bind_status()
2131 task->tk_action = call_bind; in call_bind_status()
2136 * 4b. Connect to the RPC server
2141 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_connect()
2143 if (rpc_task_transmitted(task)) { in call_connect()
2148 if (xprt_connected(xprt)) { in call_connect()
2149 task->tk_action = call_transmit; in call_connect()
2153 task->tk_action = call_connect_status; in call_connect()
2154 if (task->tk_status < 0) in call_connect()
2156 if (task->tk_flags & RPC_TASK_NOCONNECT) { in call_connect()
2157 rpc_call_rpcerror(task, -ENOTCONN); in call_connect()
2160 if (!xprt_prepare_transmit(task)) in call_connect()
2171 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_connect_status()
2172 struct rpc_clnt *clnt = task->tk_client; in call_connect_status()
2173 int status = task->tk_status; in call_connect_status()
2175 if (rpc_task_transmitted(task)) { in call_connect_status()
2182 if (task->tk_status == 0) { in call_connect_status()
2183 clnt->cl_stats->netreconn++; in call_connect_status()
2186 if (xprt_connected(xprt)) { in call_connect_status()
2187 task->tk_status = 0; in call_connect_status()
2191 task->tk_status = 0; in call_connect_status()
2193 case -ECONNREFUSED: in call_connect_status()
2194 case -ECONNRESET: in call_connect_status()
2196 if (RPC_IS_SOFTCONN(task)) in call_connect_status()
2198 if (clnt->cl_autobind) { in call_connect_status()
2203 case -ECONNABORTED: in call_connect_status()
2204 case -ENETDOWN: in call_connect_status()
2205 case -ENETUNREACH: in call_connect_status()
2206 case -EHOSTUNREACH: in call_connect_status()
2207 case -EPIPE: in call_connect_status()
2208 case -EPROTO: in call_connect_status()
2209 xprt_conditional_disconnect(task->tk_rqstp->rq_xprt, in call_connect_status()
2210 task->tk_rqstp->rq_connect_cookie); in call_connect_status()
2211 if (RPC_IS_SOFTCONN(task)) in call_connect_status()
2216 case -EADDRINUSE: in call_connect_status()
2217 case -ENOTCONN: in call_connect_status()
2218 case -EAGAIN: in call_connect_status()
2219 case -ETIMEDOUT: in call_connect_status()
2220 if (!(task->tk_flags & RPC_TASK_NO_ROUND_ROBIN) && in call_connect_status()
2221 (task->tk_flags & RPC_TASK_MOVEABLE) && in call_connect_status()
2222 test_bit(XPRT_REMOVE, &xprt->state)) { in call_connect_status()
2223 struct rpc_xprt *saved = task->tk_xprt; in call_connect_status()
2227 if (xps->xps_nxprts > 1) { in call_connect_status()
2231 value = atomic_long_dec_return(&xprt->queuelen); in call_connect_status()
2232 if (value == 0) in call_connect_status()
2236 task->tk_xprt = NULL; in call_connect_status()
2237 task->tk_action = call_start; in call_connect_status()
2240 if (!task->tk_xprt) in call_connect_status()
2244 case -ENOBUFS: in call_connect_status()
2251 task->tk_action = call_transmit; in call_connect_status()
2255 task->tk_action = call_bind; in call_connect_status()
2261 * 5. Transmit the RPC request, and wait for reply
2266 if (rpc_task_transmitted(task)) { in call_transmit()
2271 task->tk_action = call_transmit_status; in call_transmit()
2272 if (!xprt_prepare_transmit(task)) in call_transmit()
2274 task->tk_status = 0; in call_transmit()
2275 if (test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) { in call_transmit()
2276 if (!xprt_connected(task->tk_xprt)) { in call_transmit()
2277 task->tk_status = -ENOTCONN; in call_transmit()
2291 task->tk_action = call_status; in call_transmit_status()
2297 if (rpc_task_transmitted(task)) { in call_transmit_status()
2298 task->tk_status = 0; in call_transmit_status()
2303 switch (task->tk_status) { in call_transmit_status()
2306 case -EBADMSG: in call_transmit_status()
2307 task->tk_status = 0; in call_transmit_status()
2308 task->tk_action = call_encode; in call_transmit_status()
2311 * Special cases: if we've been waiting on the in call_transmit_status()
2312 * socket's write_space() callback, or if the in call_transmit_status()
2316 case -ENOMEM: in call_transmit_status()
2317 case -ENOBUFS: in call_transmit_status()
2320 case -EBADSLT: in call_transmit_status()
2321 case -EAGAIN: in call_transmit_status()
2322 task->tk_action = call_transmit; in call_transmit_status()
2323 task->tk_status = 0; in call_transmit_status()
2325 case -ECONNREFUSED: in call_transmit_status()
2326 case -EHOSTDOWN: in call_transmit_status()
2327 case -ENETDOWN: in call_transmit_status()
2328 case -EHOSTUNREACH: in call_transmit_status()
2329 case -ENETUNREACH: in call_transmit_status()
2330 case -EPERM: in call_transmit_status()
2331 if (RPC_IS_SOFTCONN(task)) { in call_transmit_status()
2332 if (!task->tk_msg.rpc_proc->p_proc) in call_transmit_status()
2333 trace_xprt_ping(task->tk_xprt, in call_transmit_status()
2334 task->tk_status); in call_transmit_status()
2335 rpc_call_rpcerror(task, task->tk_status); in call_transmit_status()
2339 case -ECONNRESET: in call_transmit_status()
2340 case -ECONNABORTED: in call_transmit_status()
2341 case -EADDRINUSE: in call_transmit_status()
2342 case -ENOTCONN: in call_transmit_status()
2343 case -EPIPE: in call_transmit_status()
2344 task->tk_action = call_bind; in call_transmit_status()
2345 task->tk_status = 0; in call_transmit_status()
2351 #if defined(CONFIG_SUNRPC_BACKCHANNEL)
2359 task->tk_action = call_bc_transmit; in call_bc_encode()
2363 * 5b. Send the backchannel RPC reply. On error, drop the reply. In
2369 task->tk_action = call_bc_transmit_status; in call_bc_transmit()
2370 if (test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) { in call_bc_transmit()
2371 if (!xprt_prepare_transmit(task)) in call_bc_transmit()
2373 task->tk_status = 0; in call_bc_transmit()
2382 struct rpc_rqst *req = task->tk_rqstp; in call_bc_transmit_status()
2384 if (rpc_task_transmitted(task)) in call_bc_transmit_status()
2385 task->tk_status = 0; in call_bc_transmit_status()
2387 switch (task->tk_status) { in call_bc_transmit_status()
2390 case -ENETDOWN: in call_bc_transmit_status()
2391 case -EHOSTDOWN: in call_bc_transmit_status()
2392 case -EHOSTUNREACH: in call_bc_transmit_status()
2393 case -ENETUNREACH: in call_bc_transmit_status()
2394 case -ECONNRESET: in call_bc_transmit_status()
2395 case -ECONNREFUSED: in call_bc_transmit_status()
2396 case -EADDRINUSE: in call_bc_transmit_status()
2397 case -ENOTCONN: in call_bc_transmit_status()
2398 case -EPIPE: in call_bc_transmit_status()
2400 case -ENOMEM: in call_bc_transmit_status()
2401 case -ENOBUFS: in call_bc_transmit_status()
2404 case -EBADSLT: in call_bc_transmit_status()
2405 case -EAGAIN: in call_bc_transmit_status()
2406 task->tk_status = 0; in call_bc_transmit_status()
2407 task->tk_action = call_bc_transmit; in call_bc_transmit_status()
2409 case -ETIMEDOUT: in call_bc_transmit_status()
2417 printk(KERN_NOTICE "RPC: Could not send backchannel reply " in call_bc_transmit_status()
2418 "error: %d\n", task->tk_status); in call_bc_transmit_status()
2419 xprt_conditional_disconnect(req->rq_xprt, in call_bc_transmit_status()
2420 req->rq_connect_cookie); in call_bc_transmit_status()
2427 printk(KERN_NOTICE "RPC: Could not send backchannel reply " in call_bc_transmit_status()
2428 "error: %d\n", task->tk_status); in call_bc_transmit_status()
2431 task->tk_action = rpc_exit_task; in call_bc_transmit_status()
2436 * 6. Sort out the RPC call status
2441 struct rpc_clnt *clnt = task->tk_client; in call_status()
2444 if (!task->tk_msg.rpc_proc->p_proc) in call_status()
2445 trace_xprt_ping(task->tk_xprt, task->tk_status); in call_status()
2447 status = task->tk_status; in call_status()
2448 if (status >= 0) { in call_status()
2449 task->tk_action = call_decode; in call_status()
2454 task->tk_status = 0; in call_status()
2456 case -EHOSTDOWN: in call_status()
2457 case -ENETDOWN: in call_status()
2458 case -EHOSTUNREACH: in call_status()
2459 case -ENETUNREACH: in call_status()
2460 case -EPERM: in call_status()
2461 if (RPC_IS_SOFTCONN(task)) in call_status()
2464 * Delay any retries for 3 seconds, then handle as if it in call_status()
2469 case -ETIMEDOUT: in call_status()
2471 case -ECONNREFUSED: in call_status()
2472 case -ECONNRESET: in call_status()
2473 case -ECONNABORTED: in call_status()
2474 case -ENOTCONN: in call_status()
2477 case -EADDRINUSE: in call_status()
2480 case -EPIPE: in call_status()
2481 case -EAGAIN: in call_status()
2483 case -ENFILE: in call_status()
2484 case -ENOBUFS: in call_status()
2485 case -ENOMEM: in call_status()
2488 case -EIO: in call_status()
2492 if (clnt->cl_chatty) in call_status()
2493 printk("%s: RPC call returned error %d\n", in call_status()
2494 clnt->cl_program->name, -status); in call_status()
2497 task->tk_action = call_encode; in call_status()
2508 if (!req || !req->rq_xprt) in rpc_check_connected()
2510 return xprt_connected(req->rq_xprt); in rpc_check_connected()
2516 struct rpc_clnt *clnt = task->tk_client; in rpc_check_timeout()
2518 if (RPC_SIGNALLED(task)) in rpc_check_timeout()
2521 if (xprt_adjust_timeout(task->tk_rqstp) == 0) in rpc_check_timeout()
2525 task->tk_timeouts++; in rpc_check_timeout()
2527 if (RPC_IS_SOFTCONN(task) && !rpc_check_connected(task->tk_rqstp)) { in rpc_check_timeout()
2528 rpc_call_rpcerror(task, -ETIMEDOUT); in rpc_check_timeout()
2532 if (RPC_IS_SOFT(task)) { in rpc_check_timeout()
2535 * been sent, it should time out only if the transport in rpc_check_timeout()
2538 if ((task->tk_flags & RPC_TASK_NO_RETRANS_TIMEOUT) && in rpc_check_timeout()
2539 rpc_check_connected(task->tk_rqstp)) in rpc_check_timeout()
2542 if (clnt->cl_chatty) { in rpc_check_timeout()
2545 clnt->cl_program->name, in rpc_check_timeout()
2546 task->tk_xprt->servername); in rpc_check_timeout()
2548 if (task->tk_flags & RPC_TASK_TIMEOUT) in rpc_check_timeout()
2549 rpc_call_rpcerror(task, -ETIMEDOUT); in rpc_check_timeout()
2551 __rpc_call_rpcerror(task, -EIO, -ETIMEDOUT); in rpc_check_timeout()
2555 if (!(task->tk_flags & RPC_CALL_MAJORSEEN)) { in rpc_check_timeout()
2556 task->tk_flags |= RPC_CALL_MAJORSEEN; in rpc_check_timeout()
2557 if (clnt->cl_chatty) { in rpc_check_timeout()
2560 clnt->cl_program->name, in rpc_check_timeout()
2561 task->tk_xprt->servername); in rpc_check_timeout()
2566 * Did our request time out due to an RPCSEC_GSS out-of-sequence in rpc_check_timeout()
2573 * 7. Decode the RPC reply
2578 struct rpc_clnt *clnt = task->tk_client; in call_decode()
2579 struct rpc_rqst *req = task->tk_rqstp; in call_decode()
2583 if (!task->tk_msg.rpc_proc->p_decode) { in call_decode()
2584 task->tk_action = rpc_exit_task; in call_decode()
2588 if (task->tk_flags & RPC_CALL_MAJORSEEN) { in call_decode()
2589 if (clnt->cl_chatty) { in call_decode()
2591 clnt->cl_program->name, in call_decode()
2592 task->tk_xprt->servername); in call_decode()
2594 task->tk_flags &= ~RPC_CALL_MAJORSEEN; in call_decode()
2598 * Did we ever call xprt_complete_rqst()? If not, we should assume in call_decode()
2601 err = -EAGAIN; in call_decode()
2602 if (!req->rq_reply_bytes_recvd) in call_decode()
2606 * before it changed req->rq_reply_bytes_recvd. in call_decode()
2610 req->rq_rcv_buf.len = req->rq_private_buf.len; in call_decode()
2611 trace_rpc_xdr_recvfrom(task, &req->rq_rcv_buf); in call_decode()
2614 WARN_ON(memcmp(&req->rq_rcv_buf, &req->rq_private_buf, in call_decode()
2615 sizeof(req->rq_rcv_buf)) != 0); in call_decode()
2617 xdr_init_decode(&xdr, &req->rq_rcv_buf, in call_decode()
2618 req->rq_rcv_buf.head[0].iov_base, req); in call_decode()
2623 task->tk_action = rpc_exit_task; in call_decode()
2624 task->tk_status = rpcauth_unwrap_resp(task, &xdr); in call_decode()
2627 case -EAGAIN: in call_decode()
2628 task->tk_status = 0; in call_decode()
2629 if (task->tk_client->cl_discrtry) in call_decode()
2630 xprt_conditional_disconnect(req->rq_xprt, in call_decode()
2631 req->rq_connect_cookie); in call_decode()
2632 task->tk_action = call_encode; in call_decode()
2635 case -EKEYREJECTED: in call_decode()
2636 task->tk_action = call_reserve; in call_decode()
2639 /* Ensure we obtain a new XID if we retry! */ in call_decode()
2647 struct rpc_clnt *clnt = task->tk_client; in rpc_encode_header()
2648 struct rpc_rqst *req = task->tk_rqstp; in rpc_encode_header()
2652 error = -EMSGSIZE; in rpc_encode_header()
2654 if (!p) in rpc_encode_header()
2656 *p++ = req->rq_xid; in rpc_encode_header()
2659 *p++ = cpu_to_be32(clnt->cl_prog); in rpc_encode_header()
2660 *p++ = cpu_to_be32(clnt->cl_vers); in rpc_encode_header()
2661 *p = cpu_to_be32(task->tk_msg.rpc_proc->p_proc); in rpc_encode_header()
2664 if (error < 0) in rpc_encode_header()
2676 struct rpc_clnt *clnt = task->tk_client; in rpc_decode_header()
2680 /* RFC-1014 says that the representation of XDR data must be a in rpc_decode_header()
2682 * - if it isn't pointer subtraction in the NFS client may give in rpc_decode_header()
2685 if (task->tk_rqstp->rq_rcv_buf.len & 3) in rpc_decode_header()
2689 if (!p) in rpc_decode_header()
2692 if (*p++ != rpc_reply) in rpc_decode_header()
2694 if (*p++ != rpc_msg_accepted) in rpc_decode_header()
2698 if (error) in rpc_decode_header()
2702 if (!p) in rpc_decode_header()
2709 error = -EPFNOSUPPORT; in rpc_decode_header()
2713 error = -EPROTONOSUPPORT; in rpc_decode_header()
2717 error = -EOPNOTSUPP; in rpc_decode_header()
2722 error = -EIO; in rpc_decode_header()
2729 clnt->cl_stats->rpcgarbage++; in rpc_decode_header()
2730 if (task->tk_garb_retry) { in rpc_decode_header()
2731 task->tk_garb_retry--; in rpc_decode_header()
2732 task->tk_action = call_encode; in rpc_decode_header()
2733 return -EAGAIN; in rpc_decode_header()
2741 error = -EIO; in rpc_decode_header()
2747 case -EPROTONOSUPPORT: in rpc_decode_header()
2749 case -EACCES: in rpc_decode_header()
2750 /* Re-encode with a fresh cred */ in rpc_decode_header()
2757 error = -EACCES; in rpc_decode_header()
2759 if (!p) in rpc_decode_header()
2766 error = -EPROTONOSUPPORT; in rpc_decode_header()
2773 if (!p) in rpc_decode_header()
2781 if (!task->tk_cred_retry) in rpc_decode_header()
2783 task->tk_cred_retry--; in rpc_decode_header()
2785 return -EKEYREJECTED; in rpc_decode_header()
2789 if (!task->tk_garb_retry) in rpc_decode_header()
2791 task->tk_garb_retry--; in rpc_decode_header()
2793 task->tk_action = call_encode; in rpc_decode_header()
2794 return -EAGAIN; in rpc_decode_header()
2797 pr_warn("RPC: server %s requires stronger authentication.\n", in rpc_decode_header()
2798 task->tk_xprt->servername); in rpc_decode_header()
2829 task->tk_flags &= ~RPC_TASK_NO_RETRANS_TIMEOUT; in rpc_null_call_prepare()
2871 if (clnt->cl_auth->au_ops->ping) in rpc_ping()
2872 return clnt->cl_auth->au_ops->ping(clnt); in rpc_ping()
2875 if (IS_ERR(task)) in rpc_ping()
2877 status = task->tk_status; in rpc_ping()
2897 if (IS_ERR(task)) in rpc_ping_noreply()
2899 status = task->tk_status; in rpc_ping_noreply()
2913 if (task->tk_status == 0) in rpc_cb_add_xprt_done()
2914 rpc_xprt_switch_add_xprt(data->xps, data->xprt); in rpc_cb_add_xprt_done()
2921 xprt_put(data->xprt); in rpc_cb_add_xprt_release()
2922 xprt_switch_put(data->xps); in rpc_cb_add_xprt_release()
2933 * rpc_clnt_test_and_add_xprt - Test and add a new transport to a rpc_clnt
2945 int max_connect = clnt->cl_max_connect; in rpc_clnt_test_and_add_xprt()
2947 if (in_max_connect) in rpc_clnt_test_and_add_xprt()
2949 if (xps->xps_nunique_destaddr_xprts + 1 > max_connect) { in rpc_clnt_test_and_add_xprt()
2955 return -EINVAL; in rpc_clnt_test_and_add_xprt()
2959 if (!data) in rpc_clnt_test_and_add_xprt()
2960 return -ENOMEM; in rpc_clnt_test_and_add_xprt()
2961 data->xps = xprt_switch_get(xps); in rpc_clnt_test_and_add_xprt()
2962 data->xprt = xprt_get(xprt); in rpc_clnt_test_and_add_xprt()
2963 if (rpc_xprt_switch_has_addr(data->xps, (struct sockaddr *)&xprt->addr)) { in rpc_clnt_test_and_add_xprt()
2970 if (IS_ERR(task)) in rpc_clnt_test_and_add_xprt()
2973 data->xps->xps_nunique_destaddr_xprts++; in rpc_clnt_test_and_add_xprt()
2985 int status = -EADDRINUSE; in rpc_clnt_add_xprt_helper()
2989 if (IS_ERR(task)) in rpc_clnt_add_xprt_helper()
2992 status = task->tk_status; in rpc_clnt_add_xprt_helper()
2995 if (status < 0) in rpc_clnt_add_xprt_helper()
2999 data->add_xprt_test(clnt, xprt, data->data); in rpc_clnt_add_xprt_helper()
3027 int status = -EADDRINUSE; in rpc_clnt_setup_test_and_add_xprt()
3032 if (rpc_xprt_switch_has_addr(xps, (struct sockaddr *)&xprt->addr)) in rpc_clnt_setup_test_and_add_xprt()
3036 if (status < 0) in rpc_clnt_setup_test_and_add_xprt()
3043 if (status < 0) in rpc_clnt_setup_test_and_add_xprt()
3044 pr_info("RPC: rpc_clnt_test_xprt failed: %d addr %s not " in rpc_clnt_setup_test_and_add_xprt()
3046 xprt->address_strings[RPC_DISPLAY_ADDR]); in rpc_clnt_setup_test_and_add_xprt()
3053 * rpc_clnt_add_xprt - Add a new transport to a rpc_clnt
3061 * If ping is set, then test that connectivity succeeds before
3081 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in rpc_clnt_add_xprt()
3082 xprt = xprt_iter_xprt(&clnt->cl_xpi); in rpc_clnt_add_xprt()
3083 if (xps == NULL || xprt == NULL) { in rpc_clnt_add_xprt()
3086 return -EAGAIN; in rpc_clnt_add_xprt()
3088 resvport = xprt->resvport; in rpc_clnt_add_xprt()
3089 reuseport = xprt->reuseport; in rpc_clnt_add_xprt()
3090 connect_timeout = xprt->connect_timeout; in rpc_clnt_add_xprt()
3091 reconnect_timeout = xprt->max_reconnect_timeout; in rpc_clnt_add_xprt()
3092 ident = xprt->xprt_class->ident; in rpc_clnt_add_xprt()
3095 if (!xprtargs->ident) in rpc_clnt_add_xprt()
3096 xprtargs->ident = ident; in rpc_clnt_add_xprt()
3097 xprtargs->xprtsec = clnt->cl_xprtsec; in rpc_clnt_add_xprt()
3099 if (IS_ERR(xprt)) { in rpc_clnt_add_xprt()
3103 xprt->resvport = resvport; in rpc_clnt_add_xprt()
3104 xprt->reuseport = reuseport; in rpc_clnt_add_xprt()
3106 if (xprtargs->connect_timeout) in rpc_clnt_add_xprt()
3107 connect_timeout = xprtargs->connect_timeout; in rpc_clnt_add_xprt()
3108 if (xprtargs->reconnect_timeout) in rpc_clnt_add_xprt()
3109 reconnect_timeout = xprtargs->reconnect_timeout; in rpc_clnt_add_xprt()
3110 if (xprt->ops->set_connect_timeout != NULL) in rpc_clnt_add_xprt()
3111 xprt->ops->set_connect_timeout(xprt, in rpc_clnt_add_xprt()
3116 if (setup) { in rpc_clnt_add_xprt()
3118 if (ret != 0) in rpc_clnt_add_xprt()
3140 main_xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); in rpc_xprt_probe_trunked()
3141 status = rpc_cmp_addr_port((struct sockaddr *)&xprt->addr, in rpc_xprt_probe_trunked()
3142 (struct sockaddr *)&main_xprt->addr); in rpc_xprt_probe_trunked()
3145 if (status || !test_bit(XPRT_OFFLINE, &xprt->state)) in rpc_xprt_probe_trunked()
3154 /* rpc_clnt_probe_trunked_xprt -- probe offlined transport for session trunking
3158 * the function rpc_xprt_probe_trunked() which will determine if this
3168 if (ret) in rpc_clnt_probe_trunked_xprts()
3173 if (!xprt) in rpc_clnt_probe_trunked_xprts()
3177 if (ret < 0) in rpc_clnt_probe_trunked_xprts()
3196 main_xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); in rpc_xprt_offline()
3197 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in rpc_xprt_offline()
3198 err = rpc_cmp_addr_port((struct sockaddr *)&xprt->addr, in rpc_xprt_offline()
3199 (struct sockaddr *)&main_xprt->addr); in rpc_xprt_offline()
3202 if (err) in rpc_xprt_offline()
3205 if (wait_on_bit_lock(&xprt->state, XPRT_LOCKED, TASK_KILLABLE)) { in rpc_xprt_offline()
3206 err = -EINTR; in rpc_xprt_offline()
3218 /* rpc_clnt_manage_trunked_xprts -- offline trunked transports
3243 if (xprt->ops->set_connect_timeout) in rpc_xprt_set_connect_timeout()
3244 xprt->ops->set_connect_timeout(xprt, in rpc_xprt_set_connect_timeout()
3245 timeo->connect_timeout, in rpc_xprt_set_connect_timeout()
3246 timeo->reconnect_timeout); in rpc_xprt_set_connect_timeout()
3278 if (rpc_clnt_xprt_switch_has_addr(clnt, in rpc_clnt_xprt_switch_add_xprt()
3279 (const struct sockaddr *)&xprt->addr)) { in rpc_clnt_xprt_switch_add_xprt()
3294 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_clnt_xprt_switch_remove_xprt()
3295 rpc_xprt_switch_remove_xprt(rcu_dereference(clnt->cl_xpi.xpi_xpswitch), in rpc_clnt_xprt_switch_remove_xprt()
3297 xps->xps_nunique_destaddr_xprts--; in rpc_clnt_xprt_switch_remove_xprt()
3309 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_clnt_xprt_switch_has_addr()
3316 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
3319 printk(KERN_INFO "-pid- flgs status -client- --rqstp- " in rpc_show_header()
3320 "-timeout ---ops--\n"); in rpc_show_header()
3328 if (RPC_IS_QUEUED(task)) in rpc_show_task()
3329 rpc_waitq = rpc_qname(task->tk_waitqueue); in rpc_show_task()
3332 task->tk_pid, task->tk_flags, task->tk_status, in rpc_show_task()
3333 clnt, task->tk_rqstp, rpc_task_timeout(task), task->tk_ops, in rpc_show_task()
3334 clnt->cl_program->name, clnt->cl_vers, rpc_proc_name(task), in rpc_show_task()
3335 task->tk_action, rpc_waitq); in rpc_show_task()
3345 spin_lock(&sn->rpc_client_lock); in rpc_show_tasks()
3346 list_for_each_entry(clnt, &sn->all_clients, cl_clients) { in rpc_show_tasks()
3347 spin_lock(&clnt->cl_lock); in rpc_show_tasks()
3348 list_for_each_entry(task, &clnt->cl_tasks, tk_task) { in rpc_show_tasks()
3349 if (!header) { in rpc_show_tasks()
3355 spin_unlock(&clnt->cl_lock); in rpc_show_tasks()
3357 spin_unlock(&sn->rpc_client_lock); in rpc_show_tasks()
3361 #if IS_ENABLED(CONFIG_SUNRPC_SWAP)
3373 while (clnt != clnt->cl_parent) in rpc_clnt_swap_activate()
3374 clnt = clnt->cl_parent; in rpc_clnt_swap_activate()
3375 if (atomic_inc_return(&clnt->cl_swapper) == 1) in rpc_clnt_swap_activate()
3394 while (clnt != clnt->cl_parent) in rpc_clnt_swap_deactivate()
3395 clnt = clnt->cl_parent; in rpc_clnt_swap_deactivate()
3396 if (atomic_dec_if_positive(&clnt->cl_swapper) == 0) in rpc_clnt_swap_deactivate()