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 = 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()
694 * rpc_clone_client_set_auth - Clone an RPC client structure and set its auth
696 * @clnt: RPC client whose parameters are copied
699 * Returns a fresh RPC client or an ERR_PTR.
705 .program = clnt->cl_program, in rpc_clone_client_set_auth()
706 .prognumber = clnt->cl_prog, in rpc_clone_client_set_auth()
707 .version = clnt->cl_vers, in rpc_clone_client_set_auth()
709 .cred = clnt->cl_cred, in rpc_clone_client_set_auth()
716 * rpc_switch_client_transport: switch the RPC transport on the fly
721 * This function allows the caller to switch the RPC transport for the
724 * there are no active RPC tasks by using some form of locking.
726 * Returns zero if "clnt" is now using the new xprt. Otherwise a
741 args->xprtsec = clnt->cl_xprtsec; in rpc_switch_client_transport()
743 if (IS_ERR(xprt)) in rpc_switch_client_transport()
747 if (xps == NULL) { in rpc_switch_client_transport()
749 return -ENOMEM; in rpc_switch_client_transport()
752 pseudoflavor = clnt->cl_auth->au_flavor; in rpc_switch_client_transport()
754 old_timeo = clnt->cl_timeout; in rpc_switch_client_transport()
756 oldxps = xprt_iter_xchg_switch(&clnt->cl_xpi, xps); in rpc_switch_client_transport()
766 * children, if it has any, still point to the old xprt. in rpc_switch_client_transport()
768 parent = clnt->cl_parent; in rpc_switch_client_transport()
769 clnt->cl_parent = clnt; in rpc_switch_client_transport()
772 * The old rpc_auth cache cannot be re-used. GSS in rpc_switch_client_transport()
777 if (err) in rpc_switch_client_transport()
781 if (parent != clnt) in rpc_switch_client_transport()
789 xps = xprt_iter_xchg_switch(&clnt->cl_xpi, oldxps); in rpc_switch_client_transport()
791 clnt->cl_parent = parent; in rpc_switch_client_transport()
807 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in _rpc_clnt_xprt_iter_init()
809 if (xps == NULL) in _rpc_clnt_xprt_iter_init()
810 return -EAGAIN; in _rpc_clnt_xprt_iter_init()
830 * rpc_clnt_iterate_for_each_xprt - Apply a function to all transports
835 * Iterates through the list of RPC transports currently attached to the
848 if (ret) in rpc_clnt_iterate_for_each_xprt()
853 if (!xprt) in rpc_clnt_iterate_for_each_xprt()
857 if (ret < 0) in rpc_clnt_iterate_for_each_xprt()
874 if (list_empty(&clnt->cl_tasks)) in rpc_killall_tasks()
881 spin_lock(&clnt->cl_lock); in rpc_killall_tasks()
882 list_for_each_entry(rovr, &clnt->cl_tasks, tk_task) in rpc_killall_tasks()
884 spin_unlock(&clnt->cl_lock); in rpc_killall_tasks()
889 * rpc_cancel_tasks - try to cancel a set of RPC tasks
890 * @clnt: Pointer to RPC client
891 * @error: RPC task error value to set
895 * Uses @fnmatch to define a set of RPC tasks that are to be cancelled.
906 if (list_empty(&clnt->cl_tasks)) in rpc_cancel_tasks()
911 spin_lock(&clnt->cl_lock); in rpc_cancel_tasks()
912 list_for_each_entry(task, &clnt->cl_tasks, tk_task) { in rpc_cancel_tasks()
913 if (!RPC_IS_ACTIVATED(task)) in rpc_cancel_tasks()
915 if (!fnmatch(task, data)) in rpc_cancel_tasks()
920 spin_unlock(&clnt->cl_lock); in rpc_cancel_tasks()
928 if (xprt_connected(xprt)) in rpc_clnt_disconnect_xprt()
940 * Properly shut down an RPC client, terminating all outstanding
949 while (!list_empty(&clnt->cl_tasks)) { in rpc_shutdown_client()
952 list_empty(&clnt->cl_tasks), 1*HZ); in rpc_shutdown_client()
960 * Free an RPC client
976 xprt_put(rcu_dereference_raw(clnt->cl_xprt)); in rpc_free_client_work()
987 if (clnt->cl_parent != clnt) in rpc_free_client()
988 parent = clnt->cl_parent; in rpc_free_client()
990 rpc_free_iostats(clnt->cl_metrics); in rpc_free_client()
991 clnt->cl_metrics = NULL; in rpc_free_client()
992 xprt_iter_destroy(&clnt->cl_xpi); in rpc_free_client()
993 put_cred(clnt->cl_cred); in rpc_free_client()
995 INIT_WORK(&clnt->cl_work, rpc_free_client_work); in rpc_free_client()
996 schedule_work(&clnt->cl_work); in rpc_free_client()
1001 * Free an RPC client
1007 * Note: RPCSEC_GSS may need to send NULL RPC calls in order to in rpc_free_auth()
1011 if (clnt->cl_auth != NULL) { in rpc_free_auth()
1012 rpcauth_release(clnt->cl_auth); in rpc_free_auth()
1013 clnt->cl_auth = NULL; in rpc_free_auth()
1015 if (refcount_dec_and_test(&clnt->cl_count)) in rpc_free_auth()
1021 * Release reference to the RPC client
1027 if (list_empty(&clnt->cl_tasks)) in rpc_release_client()
1029 if (refcount_dec_not_one(&clnt->cl_count)) in rpc_release_client()
1037 * rpc_bind_new_program - bind a new RPC program to an existing client
1039 * @program: rpc program to set
1040 * @vers: rpc program version
1042 * Clones the rpc client and sets up a new RPC program. This is mainly
1043 * of use for enabling different RPC programs to share the same transport.
1052 .prognumber = program->number, in rpc_bind_new_program()
1054 .authflavor = old->cl_auth->au_flavor, in rpc_bind_new_program()
1055 .cred = old->cl_cred, in rpc_bind_new_program()
1061 if (IS_ERR(clnt)) in rpc_bind_new_program()
1064 if (err != 0) { in rpc_bind_new_program()
1078 if (!xprt) in rpc_task_get_xprt()
1081 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_task_get_xprt()
1082 atomic_long_inc(&xps->xps_queuelen); in rpc_task_get_xprt()
1084 atomic_long_inc(&xprt->queuelen); in rpc_task_get_xprt()
1094 atomic_long_dec(&xprt->queuelen); in rpc_task_release_xprt()
1096 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_task_release_xprt()
1097 atomic_long_dec(&xps->xps_queuelen); in rpc_task_release_xprt()
1105 struct rpc_xprt *xprt = task->tk_xprt; in rpc_task_release_transport()
1107 if (xprt) { in rpc_task_release_transport()
1108 task->tk_xprt = NULL; in rpc_task_release_transport()
1109 if (task->tk_client) in rpc_task_release_transport()
1110 rpc_task_release_xprt(task->tk_client, xprt); in rpc_task_release_transport()
1119 struct rpc_clnt *clnt = task->tk_client; in rpc_task_release_client()
1122 if (clnt != NULL) { in rpc_task_release_client()
1124 spin_lock(&clnt->cl_lock); in rpc_task_release_client()
1125 list_del(&task->tk_task); in rpc_task_release_client()
1126 spin_unlock(&clnt->cl_lock); in rpc_task_release_client()
1127 task->tk_client = NULL; in rpc_task_release_client()
1139 xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); in rpc_task_get_first_xprt()
1147 return rpc_task_get_xprt(clnt, xprt_iter_get_next(&clnt->cl_xpi)); in rpc_task_get_next_xprt()
1153 if (task->tk_xprt) { in rpc_task_set_transport()
1154 if (!(test_bit(XPRT_OFFLINE, &task->tk_xprt->state) && in rpc_task_set_transport()
1155 (task->tk_flags & RPC_TASK_MOVEABLE))) in rpc_task_set_transport()
1158 xprt_put(task->tk_xprt); in rpc_task_set_transport()
1160 if (task->tk_flags & RPC_TASK_NO_ROUND_ROBIN) in rpc_task_set_transport()
1161 task->tk_xprt = rpc_task_get_first_xprt(clnt); in rpc_task_set_transport()
1163 task->tk_xprt = rpc_task_get_next_xprt(clnt); in rpc_task_set_transport()
1170 task->tk_client = clnt; in rpc_task_set_client()
1171 refcount_inc(&clnt->cl_count); in rpc_task_set_client()
1172 if (clnt->cl_softrtry) in rpc_task_set_client()
1173 task->tk_flags |= RPC_TASK_SOFT; in rpc_task_set_client()
1174 if (clnt->cl_softerr) in rpc_task_set_client()
1175 task->tk_flags |= RPC_TASK_TIMEOUT; in rpc_task_set_client()
1176 if (clnt->cl_noretranstimeo) in rpc_task_set_client()
1177 task->tk_flags |= RPC_TASK_NO_RETRANS_TIMEOUT; in rpc_task_set_client()
1179 spin_lock(&clnt->cl_lock); in rpc_task_set_client()
1180 list_add_tail(&task->tk_task, &clnt->cl_tasks); in rpc_task_set_client()
1181 spin_unlock(&clnt->cl_lock); in rpc_task_set_client()
1187 if (msg != NULL) { in rpc_task_set_rpc_message()
1188 task->tk_msg.rpc_proc = msg->rpc_proc; in rpc_task_set_rpc_message()
1189 task->tk_msg.rpc_argp = msg->rpc_argp; in rpc_task_set_rpc_message()
1190 task->tk_msg.rpc_resp = msg->rpc_resp; in rpc_task_set_rpc_message()
1191 task->tk_msg.rpc_cred = msg->rpc_cred; in rpc_task_set_rpc_message()
1192 if (!(task->tk_flags & RPC_TASK_CRED_NOREF)) in rpc_task_set_rpc_message()
1193 get_cred(task->tk_msg.rpc_cred); in rpc_task_set_rpc_message()
1198 * Default callback for async RPC calls
1210 * rpc_run_task - Allocate a new RPC task, then run rpc_execute against it
1218 if (IS_ERR(task)) in rpc_run_task()
1221 if (!RPC_IS_ASYNC(task)) in rpc_run_task()
1222 task->tk_flags |= RPC_TASK_CRED_NOREF; in rpc_run_task()
1224 rpc_task_set_client(task, task_setup_data->rpc_client); in rpc_run_task()
1225 rpc_task_set_rpc_message(task, task_setup_data->rpc_message); in rpc_run_task()
1227 if (task->tk_action == NULL) in rpc_run_task()
1230 atomic_inc(&task->tk_count); in rpc_run_task()
1237 * rpc_call_sync - Perform a synchronous RPC call
1238 * @clnt: pointer to RPC client
1239 * @msg: RPC call parameters
1240 * @flags: RPC call flags
1254 if (flags & RPC_TASK_ASYNC) { in rpc_call_sync()
1257 return -EINVAL; in rpc_call_sync()
1261 if (IS_ERR(task)) in rpc_call_sync()
1263 status = task->tk_status; in rpc_call_sync()
1270 * rpc_call_async - Perform an asynchronous RPC call
1271 * @clnt: pointer to RPC client
1272 * @msg: RPC call parameters
1273 * @flags: RPC call flags
1274 * @tk_ops: RPC call ops
1291 if (IS_ERR(task)) in rpc_call_async()
1298 #if defined(CONFIG_SUNRPC_BACKCHANNEL)
1302 * rpc_run_bc_task - Allocate a new RPC task for backchannel use, then run
1304 * @req: RPC request
1315 dprintk("RPC: rpc_run_bc_task req= %p\n", req); in rpc_run_bc_task()
1320 if (IS_ERR(task)) { in rpc_run_bc_task()
1327 task->tk_action = call_bc_encode; in rpc_run_bc_task()
1328 atomic_inc(&task->tk_count); in rpc_run_bc_task()
1329 WARN_ON_ONCE(atomic_read(&task->tk_count) != 2); in rpc_run_bc_task()
1332 dprintk("RPC: rpc_run_bc_task: task= %p\n", task); in rpc_run_bc_task()
1338 * rpc_prepare_reply_pages - Prepare to receive a reply data payload into pages
1339 * @req: RPC request to prepare
1350 hdrsize += RPC_REPHDRSIZE + req->rq_cred->cr_auth->au_ralign; in rpc_prepare_reply_pages()
1352 xdr_inline_pages(&req->rq_rcv_buf, hdrsize << 2, pages, base, len); in rpc_prepare_reply_pages()
1353 trace_rpc_xdr_reply_pages(req->rq_task, &req->rq_rcv_buf); in rpc_prepare_reply_pages()
1360 task->tk_action = call_start; in rpc_call_start()
1365 * rpc_peeraddr - extract remote peer address from clnt's xprt
1366 * @clnt: RPC client structure
1378 xprt = rcu_dereference(clnt->cl_xprt); in rpc_peeraddr()
1380 bytes = xprt->addrlen; in rpc_peeraddr()
1381 if (bytes > bufsize) in rpc_peeraddr()
1383 memcpy(buf, &xprt->addr, bytes); in rpc_peeraddr()
1391 * rpc_peeraddr2str - return remote peer address in printable format
1392 * @clnt: RPC client structure
1404 xprt = rcu_dereference(clnt->cl_xprt); in rpc_peeraddr2str()
1406 if (xprt->address_strings[format] != NULL) in rpc_peeraddr2str()
1407 return xprt->address_strings[format]; in rpc_peeraddr2str()
1428 * Returns zero and fills in "buf" if successful; otherwise, a
1437 err = __sock_create(net, sap->sa_family, in rpc_sockname()
1439 if (err < 0) { in rpc_sockname()
1440 dprintk("RPC: can't create UDP socket (%d)\n", err); in rpc_sockname()
1444 switch (sap->sa_family) { in rpc_sockname()
1456 err = -EAFNOSUPPORT; in rpc_sockname()
1459 if (err < 0) { in rpc_sockname()
1460 dprintk("RPC: can't bind UDP socket (%d)\n", err); in rpc_sockname()
1465 if (err < 0) { in rpc_sockname()
1466 dprintk("RPC: can't connect UDP socket (%d)\n", err); in rpc_sockname()
1471 if (err < 0) { in rpc_sockname()
1472 dprintk("RPC: getsockname failed (%d)\n", err); in rpc_sockname()
1477 if (buf->sa_family == AF_INET6) { in rpc_sockname()
1479 sin6->sin6_scope_id = 0; in rpc_sockname()
1481 dprintk("RPC: %s succeeded\n", __func__); in rpc_sockname()
1494 * Returns zero and fills in "buf" if successful; otherwise, a
1501 if (buflen < sizeof(rpc_inaddr_loopback)) in rpc_anyaddr()
1502 return -EINVAL; in rpc_anyaddr()
1507 if (buflen < sizeof(rpc_in6addr_loopback)) in rpc_anyaddr()
1508 return -EINVAL; in rpc_anyaddr()
1513 dprintk("RPC: %s: address family not supported\n", in rpc_anyaddr()
1515 return -EAFNOSUPPORT; in rpc_anyaddr()
1517 dprintk("RPC: %s: succeeded\n", __func__); in rpc_anyaddr()
1522 * rpc_localaddr - discover local endpoint address for an RPC client
1523 * @clnt: RPC client structure
1527 * Returns zero and fills in "buf" and "buflen" if successful;
1530 * This works even if the underlying transport is not currently connected,
1531 * or if the upper layer never previously provided a source address.
1547 xprt = rcu_dereference(clnt->cl_xprt); in rpc_localaddr()
1548 salen = xprt->addrlen; in rpc_localaddr()
1549 memcpy(sap, &xprt->addr, salen); in rpc_localaddr()
1550 net = get_net(xprt->xprt_net); in rpc_localaddr()
1556 if (err != 0) in rpc_localaddr()
1558 return rpc_anyaddr(sap->sa_family, buf, buflen); in rpc_localaddr()
1569 xprt = rcu_dereference(clnt->cl_xprt); in rpc_setbufsize()
1570 if (xprt->ops->set_buffer_size) in rpc_setbufsize()
1571 xprt->ops->set_buffer_size(xprt, sndsize, rcvsize); in rpc_setbufsize()
1577 * rpc_net_ns - Get the network namespace for this RPC client
1578 * @clnt: RPC client to query
1586 ret = rcu_dereference(clnt->cl_xprt)->xprt_net; in rpc_net_ns()
1593 * rpc_max_payload - Get maximum payload size for a transport, in bytes
1594 * @clnt: RPC client to query
1596 * For stream transports, this is one RPC record fragment (see RFC
1597 * 1831), as we don't support multi-record requests yet. For datagram
1599 * RPC header sizes.
1606 ret = rcu_dereference(clnt->cl_xprt)->max_payload; in rpc_max_payload()
1613 * rpc_max_bc_payload - Get maximum backchannel payload size, in bytes
1614 * @clnt: RPC client to query
1622 xprt = rcu_dereference(clnt->cl_xprt); in rpc_max_bc_payload()
1623 ret = xprt->ops->bc_maxpayload(xprt); in rpc_max_bc_payload()
1635 xprt = rcu_dereference(clnt->cl_xprt); in rpc_num_bc_slots()
1636 ret = xprt->ops->bc_num_slots(xprt); in rpc_num_bc_slots()
1643 * rpc_force_rebind - force transport to check that remote port is unchanged
1649 if (clnt->cl_autobind) { in rpc_force_rebind()
1651 xprt_clear_bound(rcu_dereference(clnt->cl_xprt)); in rpc_force_rebind()
1660 task->tk_status = 0; in __rpc_restart_call()
1661 task->tk_rpc_status = 0; in __rpc_restart_call()
1662 task->tk_action = action; in __rpc_restart_call()
1667 * Restart an (async) RPC call. Usually called from within the
1678 * Restart an (async) RPC call from the call_prepare state.
1684 if (task->tk_ops->rpc_call_prepare != NULL) in rpc_restart_call_prepare()
1693 const struct rpc_procinfo *proc = task->tk_msg.rpc_proc; in rpc_proc_name()
1695 if (proc) { in rpc_proc_name()
1696 if (proc->p_name) in rpc_proc_name()
1697 return proc->p_name; in rpc_proc_name()
1722 * this state is visited exactly once for each RPC.
1727 struct rpc_clnt *clnt = task->tk_client; in call_start()
1728 int idx = task->tk_msg.rpc_proc->p_statidx; in call_start()
1732 if (task->tk_client->cl_shutdown) { in call_start()
1733 rpc_call_rpcerror(task, -EIO); in call_start()
1738 if (clnt->cl_program->version[clnt->cl_vers]) in call_start()
1739 clnt->cl_program->version[clnt->cl_vers]->counts[idx]++; in call_start()
1740 clnt->cl_stats->rpccnt++; in call_start()
1741 task->tk_action = call_reserve; in call_start()
1746 * 1. Reserve an RPC call slot
1751 task->tk_status = 0; in call_reserve()
1752 task->tk_action = call_reserveresult; in call_reserve()
1764 int status = task->tk_status; in call_reserveresult()
1770 task->tk_status = 0; in call_reserveresult()
1771 if (status >= 0) { in call_reserveresult()
1772 if (task->tk_rqstp) { in call_reserveresult()
1773 task->tk_action = call_refresh; in call_reserveresult()
1777 rpc_call_rpcerror(task, -EIO); in call_reserveresult()
1782 case -ENOMEM: in call_reserveresult()
1785 case -EAGAIN: /* woken up; retry */ in call_reserveresult()
1786 task->tk_action = call_retry_reserve; in call_reserveresult()
1794 * 1c. Retry reserving an RPC call slot
1799 task->tk_status = 0; in call_retry_reserve()
1800 task->tk_action = call_reserveresult; in call_retry_reserve()
1810 task->tk_action = call_refreshresult; in call_refresh()
1811 task->tk_status = 0; in call_refresh()
1812 task->tk_client->cl_stats->rpcauthrefresh++; in call_refresh()
1822 int status = task->tk_status; in call_refreshresult()
1824 task->tk_status = 0; in call_refreshresult()
1825 task->tk_action = call_refresh; in call_refreshresult()
1828 if (rpcauth_uptodatecred(task)) { in call_refreshresult()
1829 task->tk_action = call_allocate; in call_refreshresult()
1832 /* Use rate-limiting and a max number of retries if refresh in call_refreshresult()
1836 case -ETIMEDOUT: in call_refreshresult()
1839 case -EAGAIN: in call_refreshresult()
1840 status = -EACCES; in call_refreshresult()
1842 case -EKEYEXPIRED: in call_refreshresult()
1843 if (!task->tk_cred_retry) in call_refreshresult()
1845 task->tk_cred_retry--; in call_refreshresult()
1848 case -ENOMEM: in call_refreshresult()
1863 const struct rpc_auth *auth = task->tk_rqstp->rq_cred->cr_auth; in call_allocate()
1864 struct rpc_rqst *req = task->tk_rqstp; in call_allocate()
1865 struct rpc_xprt *xprt = req->rq_xprt; in call_allocate()
1866 const struct rpc_procinfo *proc = task->tk_msg.rpc_proc; in call_allocate()
1869 task->tk_status = 0; in call_allocate()
1870 task->tk_action = call_encode; in call_allocate()
1872 if (req->rq_buffer) in call_allocate()
1875 if (proc->p_proc != 0) { in call_allocate()
1876 BUG_ON(proc->p_arglen == 0); in call_allocate()
1877 if (proc->p_decode != NULL) in call_allocate()
1878 BUG_ON(proc->p_replen == 0); in call_allocate()
1882 * Calculate the size (in quads) of the RPC call in call_allocate()
1886 req->rq_callsize = RPC_CALLHDRSIZE + (auth->au_cslack << 1) + in call_allocate()
1887 proc->p_arglen; in call_allocate()
1888 req->rq_callsize <<= 2; in call_allocate()
1893 req->rq_rcvsize = RPC_REPHDRSIZE + auth->au_rslack + \ in call_allocate()
1894 max_t(size_t, proc->p_replen, 2); in call_allocate()
1895 req->rq_rcvsize <<= 2; in call_allocate()
1897 status = xprt->ops->buf_alloc(task); in call_allocate()
1899 if (status == 0) in call_allocate()
1901 if (status != -ENOMEM) { in call_allocate()
1906 if (RPC_IS_ASYNC(task) || !fatal_signal_pending(current)) { in call_allocate()
1907 task->tk_action = call_allocate; in call_allocate()
1912 rpc_call_rpcerror(task, -ERESTARTSYS); in call_allocate()
1918 return test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate) == 0 && in rpc_task_need_encode()
1919 (!(task->tk_flags & RPC_TASK_SENT) || in rpc_task_need_encode()
1920 !(task->tk_flags & RPC_TASK_NO_RETRANS_TIMEOUT) || in rpc_task_need_encode()
1927 struct rpc_rqst *req = task->tk_rqstp; in rpc_xdr_encode()
1930 xdr_buf_init(&req->rq_snd_buf, in rpc_xdr_encode()
1931 req->rq_buffer, in rpc_xdr_encode()
1932 req->rq_callsize); in rpc_xdr_encode()
1933 xdr_buf_init(&req->rq_rcv_buf, in rpc_xdr_encode()
1934 req->rq_rbuffer, in rpc_xdr_encode()
1935 req->rq_rcvsize); in rpc_xdr_encode()
1937 req->rq_reply_bytes_recvd = 0; in rpc_xdr_encode()
1938 req->rq_snd_buf.head[0].iov_len = 0; in rpc_xdr_encode()
1939 xdr_init_encode(&xdr, &req->rq_snd_buf, in rpc_xdr_encode()
1940 req->rq_snd_buf.head[0].iov_base, req); in rpc_xdr_encode()
1941 if (rpc_encode_header(task, &xdr)) in rpc_xdr_encode()
1944 task->tk_status = rpcauth_wrap_req(task, &xdr); in rpc_xdr_encode()
1948 * 3. Encode arguments of an RPC call
1953 if (!rpc_task_need_encode(task)) in call_encode()
1961 if (task->tk_status == 0 && rpc_reply_expected(task)) in call_encode()
1962 task->tk_status = xprt_request_enqueue_receive(task); in call_encode()
1964 if (task->tk_status != 0) { in call_encode()
1966 switch (task->tk_status) { in call_encode()
1967 case -EAGAIN: in call_encode()
1968 case -ENOMEM: in call_encode()
1971 case -EKEYEXPIRED: in call_encode()
1972 if (!task->tk_cred_retry) { in call_encode()
1973 rpc_call_rpcerror(task, task->tk_status); in call_encode()
1975 task->tk_action = call_refresh; in call_encode()
1976 task->tk_cred_retry--; in call_encode()
1981 rpc_call_rpcerror(task, task->tk_status); in call_encode()
1988 task->tk_action = call_transmit; in call_encode()
1990 if (!xprt_bound(task->tk_xprt)) in call_encode()
1991 task->tk_action = call_bind; in call_encode()
1992 else if (!xprt_connected(task->tk_xprt)) in call_encode()
1993 task->tk_action = call_connect; in call_encode()
1997 * Helpers to check if the task was already transmitted, and
2003 return !test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate); in rpc_task_transmitted()
2010 task->tk_action = call_transmit_status; in rpc_task_handle_transmitted()
2014 * 4. Get the server port number if not yet set
2019 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_bind()
2021 if (rpc_task_transmitted(task)) { in call_bind()
2026 if (xprt_bound(xprt)) { in call_bind()
2027 task->tk_action = call_connect; in call_bind()
2031 task->tk_action = call_bind_status; in call_bind()
2032 if (!xprt_prepare_transmit(task)) in call_bind()
2035 xprt->ops->rpcbind(task); in call_bind()
2044 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_bind_status()
2045 int status = -EIO; in call_bind_status()
2047 if (rpc_task_transmitted(task)) { in call_bind_status()
2052 if (task->tk_status >= 0) in call_bind_status()
2054 if (xprt_bound(xprt)) { in call_bind_status()
2055 task->tk_status = 0; in call_bind_status()
2059 switch (task->tk_status) { in call_bind_status()
2060 case -ENOMEM: in call_bind_status()
2063 case -EACCES: in call_bind_status()
2065 /* fail immediately if this is an RPC ping */ in call_bind_status()
2066 if (task->tk_msg.rpc_proc->p_proc == 0) { in call_bind_status()
2067 status = -EOPNOTSUPP; in call_bind_status()
2072 case -ENOBUFS: in call_bind_status()
2075 case -EAGAIN: in call_bind_status()
2077 case -ETIMEDOUT: in call_bind_status()
2080 case -EPFNOSUPPORT: in call_bind_status()
2084 case -EPROTONOSUPPORT: in call_bind_status()
2087 case -ECONNREFUSED: /* connection problems */ in call_bind_status()
2088 case -ECONNRESET: in call_bind_status()
2089 case -ECONNABORTED: in call_bind_status()
2090 case -ENOTCONN: in call_bind_status()
2091 case -EHOSTDOWN: in call_bind_status()
2092 case -ENETDOWN: in call_bind_status()
2093 case -EHOSTUNREACH: in call_bind_status()
2094 case -ENETUNREACH: in call_bind_status()
2095 case -EPIPE: in call_bind_status()
2097 if (!RPC_IS_SOFTCONN(task)) { in call_bind_status()
2101 status = task->tk_status; in call_bind_status()
2110 task->tk_action = call_connect; in call_bind_status()
2113 task->tk_status = 0; in call_bind_status()
2114 task->tk_action = call_bind; in call_bind_status()
2119 * 4b. Connect to the RPC server
2124 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_connect()
2126 if (rpc_task_transmitted(task)) { in call_connect()
2131 if (xprt_connected(xprt)) { in call_connect()
2132 task->tk_action = call_transmit; in call_connect()
2136 task->tk_action = call_connect_status; in call_connect()
2137 if (task->tk_status < 0) in call_connect()
2139 if (task->tk_flags & RPC_TASK_NOCONNECT) { in call_connect()
2140 rpc_call_rpcerror(task, -ENOTCONN); in call_connect()
2143 if (!xprt_prepare_transmit(task)) in call_connect()
2154 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in call_connect_status()
2155 struct rpc_clnt *clnt = task->tk_client; in call_connect_status()
2156 int status = task->tk_status; in call_connect_status()
2158 if (rpc_task_transmitted(task)) { in call_connect_status()
2165 if (task->tk_status == 0) { in call_connect_status()
2166 clnt->cl_stats->netreconn++; in call_connect_status()
2169 if (xprt_connected(xprt)) { in call_connect_status()
2170 task->tk_status = 0; in call_connect_status()
2174 task->tk_status = 0; in call_connect_status()
2176 case -ECONNREFUSED: in call_connect_status()
2177 case -ECONNRESET: in call_connect_status()
2179 if (RPC_IS_SOFTCONN(task)) in call_connect_status()
2181 if (clnt->cl_autobind) { in call_connect_status()
2186 case -ECONNABORTED: in call_connect_status()
2187 case -ENETDOWN: in call_connect_status()
2188 case -ENETUNREACH: in call_connect_status()
2189 case -EHOSTUNREACH: in call_connect_status()
2190 case -EPIPE: in call_connect_status()
2191 case -EPROTO: in call_connect_status()
2192 xprt_conditional_disconnect(task->tk_rqstp->rq_xprt, in call_connect_status()
2193 task->tk_rqstp->rq_connect_cookie); in call_connect_status()
2194 if (RPC_IS_SOFTCONN(task)) in call_connect_status()
2199 case -EADDRINUSE: in call_connect_status()
2200 case -ENOTCONN: in call_connect_status()
2201 case -EAGAIN: in call_connect_status()
2202 case -ETIMEDOUT: in call_connect_status()
2203 if (!(task->tk_flags & RPC_TASK_NO_ROUND_ROBIN) && in call_connect_status()
2204 (task->tk_flags & RPC_TASK_MOVEABLE) && in call_connect_status()
2205 test_bit(XPRT_REMOVE, &xprt->state)) { in call_connect_status()
2206 struct rpc_xprt *saved = task->tk_xprt; in call_connect_status()
2210 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in call_connect_status()
2212 if (xps->xps_nxprts > 1) { in call_connect_status()
2216 value = atomic_long_dec_return(&xprt->queuelen); in call_connect_status()
2217 if (value == 0) in call_connect_status()
2221 task->tk_xprt = NULL; in call_connect_status()
2222 task->tk_action = call_start; in call_connect_status()
2225 if (!task->tk_xprt) in call_connect_status()
2229 case -ENOBUFS: in call_connect_status()
2236 task->tk_action = call_transmit; in call_connect_status()
2240 task->tk_action = call_bind; in call_connect_status()
2245 * 5. Transmit the RPC request, and wait for reply
2250 if (rpc_task_transmitted(task)) { in call_transmit()
2255 task->tk_action = call_transmit_status; in call_transmit()
2256 if (!xprt_prepare_transmit(task)) in call_transmit()
2258 task->tk_status = 0; in call_transmit()
2259 if (test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) { in call_transmit()
2260 if (!xprt_connected(task->tk_xprt)) { in call_transmit()
2261 task->tk_status = -ENOTCONN; in call_transmit()
2275 task->tk_action = call_status; in call_transmit_status()
2281 if (rpc_task_transmitted(task)) { in call_transmit_status()
2282 task->tk_status = 0; in call_transmit_status()
2287 switch (task->tk_status) { in call_transmit_status()
2290 case -EBADMSG: in call_transmit_status()
2291 task->tk_status = 0; in call_transmit_status()
2292 task->tk_action = call_encode; in call_transmit_status()
2295 * Special cases: if we've been waiting on the in call_transmit_status()
2296 * socket's write_space() callback, or if the in call_transmit_status()
2300 case -ENOMEM: in call_transmit_status()
2301 case -ENOBUFS: in call_transmit_status()
2304 case -EBADSLT: in call_transmit_status()
2305 case -EAGAIN: in call_transmit_status()
2306 task->tk_action = call_transmit; in call_transmit_status()
2307 task->tk_status = 0; in call_transmit_status()
2309 case -ECONNREFUSED: in call_transmit_status()
2310 case -EHOSTDOWN: in call_transmit_status()
2311 case -ENETDOWN: in call_transmit_status()
2312 case -EHOSTUNREACH: in call_transmit_status()
2313 case -ENETUNREACH: in call_transmit_status()
2314 case -EPERM: in call_transmit_status()
2315 if (RPC_IS_SOFTCONN(task)) { in call_transmit_status()
2316 if (!task->tk_msg.rpc_proc->p_proc) in call_transmit_status()
2317 trace_xprt_ping(task->tk_xprt, in call_transmit_status()
2318 task->tk_status); in call_transmit_status()
2319 rpc_call_rpcerror(task, task->tk_status); in call_transmit_status()
2323 case -ECONNRESET: in call_transmit_status()
2324 case -ECONNABORTED: in call_transmit_status()
2325 case -EADDRINUSE: in call_transmit_status()
2326 case -ENOTCONN: in call_transmit_status()
2327 case -EPIPE: in call_transmit_status()
2328 task->tk_action = call_bind; in call_transmit_status()
2329 task->tk_status = 0; in call_transmit_status()
2335 #if defined(CONFIG_SUNRPC_BACKCHANNEL)
2343 task->tk_action = call_bc_transmit; in call_bc_encode()
2347 * 5b. Send the backchannel RPC reply. On error, drop the reply. In
2353 task->tk_action = call_bc_transmit_status; in call_bc_transmit()
2354 if (test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) { in call_bc_transmit()
2355 if (!xprt_prepare_transmit(task)) in call_bc_transmit()
2357 task->tk_status = 0; in call_bc_transmit()
2366 struct rpc_rqst *req = task->tk_rqstp; in call_bc_transmit_status()
2368 if (rpc_task_transmitted(task)) in call_bc_transmit_status()
2369 task->tk_status = 0; in call_bc_transmit_status()
2371 switch (task->tk_status) { in call_bc_transmit_status()
2374 case -ENETDOWN: in call_bc_transmit_status()
2375 case -EHOSTDOWN: in call_bc_transmit_status()
2376 case -EHOSTUNREACH: in call_bc_transmit_status()
2377 case -ENETUNREACH: in call_bc_transmit_status()
2378 case -ECONNRESET: in call_bc_transmit_status()
2379 case -ECONNREFUSED: in call_bc_transmit_status()
2380 case -EADDRINUSE: in call_bc_transmit_status()
2381 case -ENOTCONN: in call_bc_transmit_status()
2382 case -EPIPE: in call_bc_transmit_status()
2384 case -ENOMEM: in call_bc_transmit_status()
2385 case -ENOBUFS: in call_bc_transmit_status()
2388 case -EBADSLT: in call_bc_transmit_status()
2389 case -EAGAIN: in call_bc_transmit_status()
2390 task->tk_status = 0; in call_bc_transmit_status()
2391 task->tk_action = call_bc_transmit; in call_bc_transmit_status()
2393 case -ETIMEDOUT: in call_bc_transmit_status()
2401 printk(KERN_NOTICE "RPC: Could not send backchannel reply " in call_bc_transmit_status()
2402 "error: %d\n", task->tk_status); in call_bc_transmit_status()
2403 xprt_conditional_disconnect(req->rq_xprt, in call_bc_transmit_status()
2404 req->rq_connect_cookie); in call_bc_transmit_status()
2411 printk(KERN_NOTICE "RPC: Could not send backchannel reply " in call_bc_transmit_status()
2412 "error: %d\n", task->tk_status); in call_bc_transmit_status()
2415 task->tk_action = rpc_exit_task; in call_bc_transmit_status()
2420 * 6. Sort out the RPC call status
2425 struct rpc_clnt *clnt = task->tk_client; in call_status()
2428 if (!task->tk_msg.rpc_proc->p_proc) in call_status()
2429 trace_xprt_ping(task->tk_xprt, task->tk_status); in call_status()
2431 status = task->tk_status; in call_status()
2432 if (status >= 0) { in call_status()
2433 task->tk_action = call_decode; in call_status()
2438 task->tk_status = 0; in call_status()
2440 case -EHOSTDOWN: in call_status()
2441 case -ENETDOWN: in call_status()
2442 case -EHOSTUNREACH: in call_status()
2443 case -ENETUNREACH: in call_status()
2444 case -EPERM: in call_status()
2445 if (RPC_IS_SOFTCONN(task)) in call_status()
2448 * Delay any retries for 3 seconds, then handle as if it in call_status()
2453 case -ETIMEDOUT: in call_status()
2455 case -ECONNREFUSED: in call_status()
2456 case -ECONNRESET: in call_status()
2457 case -ECONNABORTED: in call_status()
2458 case -ENOTCONN: in call_status()
2461 case -EADDRINUSE: in call_status()
2464 case -EPIPE: in call_status()
2465 case -EAGAIN: in call_status()
2467 case -ENFILE: in call_status()
2468 case -ENOBUFS: in call_status()
2469 case -ENOMEM: in call_status()
2472 case -EIO: in call_status()
2476 if (clnt->cl_chatty) in call_status()
2477 printk("%s: RPC call returned error %d\n", in call_status()
2478 clnt->cl_program->name, -status); in call_status()
2481 task->tk_action = call_encode; in call_status()
2492 if (!req || !req->rq_xprt) in rpc_check_connected()
2494 return xprt_connected(req->rq_xprt); in rpc_check_connected()
2500 struct rpc_clnt *clnt = task->tk_client; in rpc_check_timeout()
2502 if (RPC_SIGNALLED(task)) in rpc_check_timeout()
2505 if (xprt_adjust_timeout(task->tk_rqstp) == 0) in rpc_check_timeout()
2509 task->tk_timeouts++; in rpc_check_timeout()
2511 if (RPC_IS_SOFTCONN(task) && !rpc_check_connected(task->tk_rqstp)) { in rpc_check_timeout()
2512 rpc_call_rpcerror(task, -ETIMEDOUT); in rpc_check_timeout()
2516 if (RPC_IS_SOFT(task)) { in rpc_check_timeout()
2519 * been sent, it should time out only if the transport in rpc_check_timeout()
2522 if ((task->tk_flags & RPC_TASK_NO_RETRANS_TIMEOUT) && in rpc_check_timeout()
2523 rpc_check_connected(task->tk_rqstp)) in rpc_check_timeout()
2526 if (clnt->cl_chatty) { in rpc_check_timeout()
2529 clnt->cl_program->name, in rpc_check_timeout()
2530 task->tk_xprt->servername); in rpc_check_timeout()
2532 if (task->tk_flags & RPC_TASK_TIMEOUT) in rpc_check_timeout()
2533 rpc_call_rpcerror(task, -ETIMEDOUT); in rpc_check_timeout()
2535 __rpc_call_rpcerror(task, -EIO, -ETIMEDOUT); in rpc_check_timeout()
2539 if (!(task->tk_flags & RPC_CALL_MAJORSEEN)) { in rpc_check_timeout()
2540 task->tk_flags |= RPC_CALL_MAJORSEEN; in rpc_check_timeout()
2541 if (clnt->cl_chatty) { in rpc_check_timeout()
2544 clnt->cl_program->name, in rpc_check_timeout()
2545 task->tk_xprt->servername); in rpc_check_timeout()
2550 * Did our request time out due to an RPCSEC_GSS out-of-sequence in rpc_check_timeout()
2557 * 7. Decode the RPC reply
2562 struct rpc_clnt *clnt = task->tk_client; in call_decode()
2563 struct rpc_rqst *req = task->tk_rqstp; in call_decode()
2567 if (!task->tk_msg.rpc_proc->p_decode) { in call_decode()
2568 task->tk_action = rpc_exit_task; in call_decode()
2572 if (task->tk_flags & RPC_CALL_MAJORSEEN) { in call_decode()
2573 if (clnt->cl_chatty) { in call_decode()
2575 clnt->cl_program->name, in call_decode()
2576 task->tk_xprt->servername); in call_decode()
2578 task->tk_flags &= ~RPC_CALL_MAJORSEEN; in call_decode()
2582 * Did we ever call xprt_complete_rqst()? If not, we should assume in call_decode()
2585 err = -EAGAIN; in call_decode()
2586 if (!req->rq_reply_bytes_recvd) in call_decode()
2590 * before it changed req->rq_reply_bytes_recvd. in call_decode()
2594 req->rq_rcv_buf.len = req->rq_private_buf.len; in call_decode()
2595 trace_rpc_xdr_recvfrom(task, &req->rq_rcv_buf); in call_decode()
2598 WARN_ON(memcmp(&req->rq_rcv_buf, &req->rq_private_buf, in call_decode()
2599 sizeof(req->rq_rcv_buf)) != 0); in call_decode()
2601 xdr_init_decode(&xdr, &req->rq_rcv_buf, in call_decode()
2602 req->rq_rcv_buf.head[0].iov_base, req); in call_decode()
2607 task->tk_action = rpc_exit_task; in call_decode()
2608 task->tk_status = rpcauth_unwrap_resp(task, &xdr); in call_decode()
2611 case -EAGAIN: in call_decode()
2612 task->tk_status = 0; in call_decode()
2613 if (task->tk_client->cl_discrtry) in call_decode()
2614 xprt_conditional_disconnect(req->rq_xprt, in call_decode()
2615 req->rq_connect_cookie); in call_decode()
2616 task->tk_action = call_encode; in call_decode()
2619 case -EKEYREJECTED: in call_decode()
2620 task->tk_action = call_reserve; in call_decode()
2623 /* Ensure we obtain a new XID if we retry! */ in call_decode()
2631 struct rpc_clnt *clnt = task->tk_client; in rpc_encode_header()
2632 struct rpc_rqst *req = task->tk_rqstp; in rpc_encode_header()
2636 error = -EMSGSIZE; in rpc_encode_header()
2638 if (!p) in rpc_encode_header()
2640 *p++ = req->rq_xid; in rpc_encode_header()
2643 *p++ = cpu_to_be32(clnt->cl_prog); in rpc_encode_header()
2644 *p++ = cpu_to_be32(clnt->cl_vers); in rpc_encode_header()
2645 *p = cpu_to_be32(task->tk_msg.rpc_proc->p_proc); in rpc_encode_header()
2648 if (error < 0) in rpc_encode_header()
2660 struct rpc_clnt *clnt = task->tk_client; in rpc_decode_header()
2664 /* RFC-1014 says that the representation of XDR data must be a in rpc_decode_header()
2666 * - if it isn't pointer subtraction in the NFS client may give in rpc_decode_header()
2669 if (task->tk_rqstp->rq_rcv_buf.len & 3) in rpc_decode_header()
2673 if (!p) in rpc_decode_header()
2676 if (*p++ != rpc_reply) in rpc_decode_header()
2678 if (*p++ != rpc_msg_accepted) in rpc_decode_header()
2682 if (error) in rpc_decode_header()
2686 if (!p) in rpc_decode_header()
2693 error = -EPFNOSUPPORT; in rpc_decode_header()
2697 error = -EPROTONOSUPPORT; in rpc_decode_header()
2701 error = -EOPNOTSUPP; in rpc_decode_header()
2706 error = -EIO; in rpc_decode_header()
2713 clnt->cl_stats->rpcgarbage++; in rpc_decode_header()
2714 if (task->tk_garb_retry) { in rpc_decode_header()
2715 task->tk_garb_retry--; in rpc_decode_header()
2716 task->tk_action = call_encode; in rpc_decode_header()
2717 return -EAGAIN; in rpc_decode_header()
2725 error = -EIO; in rpc_decode_header()
2731 case -EPROTONOSUPPORT: in rpc_decode_header()
2733 case -EACCES: in rpc_decode_header()
2734 /* Re-encode with a fresh cred */ in rpc_decode_header()
2741 error = -EACCES; in rpc_decode_header()
2743 if (!p) in rpc_decode_header()
2750 error = -EPROTONOSUPPORT; in rpc_decode_header()
2757 if (!p) in rpc_decode_header()
2765 if (!task->tk_cred_retry) in rpc_decode_header()
2767 task->tk_cred_retry--; in rpc_decode_header()
2769 return -EKEYREJECTED; in rpc_decode_header()
2773 if (!task->tk_garb_retry) in rpc_decode_header()
2775 task->tk_garb_retry--; in rpc_decode_header()
2777 task->tk_action = call_encode; in rpc_decode_header()
2778 return -EAGAIN; in rpc_decode_header()
2781 pr_warn("RPC: server %s requires stronger authentication.\n", in rpc_decode_header()
2782 task->tk_xprt->servername); in rpc_decode_header()
2813 task->tk_flags &= ~RPC_TASK_NO_RETRANS_TIMEOUT; in rpc_null_call_prepare()
2855 if (clnt->cl_auth->au_ops->ping) in rpc_ping()
2856 return clnt->cl_auth->au_ops->ping(clnt); in rpc_ping()
2859 if (IS_ERR(task)) in rpc_ping()
2861 status = task->tk_status; in rpc_ping()
2881 if (IS_ERR(task)) in rpc_ping_noreply()
2883 status = task->tk_status; in rpc_ping_noreply()
2897 if (task->tk_status == 0) in rpc_cb_add_xprt_done()
2898 rpc_xprt_switch_add_xprt(data->xps, data->xprt); in rpc_cb_add_xprt_done()
2905 xprt_put(data->xprt); in rpc_cb_add_xprt_release()
2906 xprt_switch_put(data->xps); in rpc_cb_add_xprt_release()
2917 * rpc_clnt_test_and_add_xprt - Test and add a new transport to a rpc_clnt
2929 int max_connect = clnt->cl_max_connect; in rpc_clnt_test_and_add_xprt()
2931 if (in_max_connect) in rpc_clnt_test_and_add_xprt()
2933 if (xps->xps_nunique_destaddr_xprts + 1 > max_connect) { in rpc_clnt_test_and_add_xprt()
2939 return -EINVAL; in rpc_clnt_test_and_add_xprt()
2943 if (!data) in rpc_clnt_test_and_add_xprt()
2944 return -ENOMEM; in rpc_clnt_test_and_add_xprt()
2945 data->xps = xprt_switch_get(xps); in rpc_clnt_test_and_add_xprt()
2946 data->xprt = xprt_get(xprt); in rpc_clnt_test_and_add_xprt()
2947 if (rpc_xprt_switch_has_addr(data->xps, (struct sockaddr *)&xprt->addr)) { in rpc_clnt_test_and_add_xprt()
2954 if (IS_ERR(task)) in rpc_clnt_test_and_add_xprt()
2957 data->xps->xps_nunique_destaddr_xprts++; in rpc_clnt_test_and_add_xprt()
2969 int status = -EADDRINUSE; in rpc_clnt_add_xprt_helper()
2973 if (IS_ERR(task)) in rpc_clnt_add_xprt_helper()
2976 status = task->tk_status; in rpc_clnt_add_xprt_helper()
2979 if (status < 0) in rpc_clnt_add_xprt_helper()
2983 data->add_xprt_test(clnt, xprt, data->data); in rpc_clnt_add_xprt_helper()
3011 int status = -EADDRINUSE; in rpc_clnt_setup_test_and_add_xprt()
3016 if (rpc_xprt_switch_has_addr(xps, (struct sockaddr *)&xprt->addr)) in rpc_clnt_setup_test_and_add_xprt()
3020 if (status < 0) in rpc_clnt_setup_test_and_add_xprt()
3027 if (status < 0) in rpc_clnt_setup_test_and_add_xprt()
3028 pr_info("RPC: rpc_clnt_test_xprt failed: %d addr %s not " in rpc_clnt_setup_test_and_add_xprt()
3030 xprt->address_strings[RPC_DISPLAY_ADDR]); in rpc_clnt_setup_test_and_add_xprt()
3037 * rpc_clnt_add_xprt - Add a new transport to a rpc_clnt
3045 * If ping is set, then test that connectivity succeeds before
3065 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in rpc_clnt_add_xprt()
3066 xprt = xprt_iter_xprt(&clnt->cl_xpi); in rpc_clnt_add_xprt()
3067 if (xps == NULL || xprt == NULL) { in rpc_clnt_add_xprt()
3070 return -EAGAIN; in rpc_clnt_add_xprt()
3072 resvport = xprt->resvport; in rpc_clnt_add_xprt()
3073 reuseport = xprt->reuseport; in rpc_clnt_add_xprt()
3074 connect_timeout = xprt->connect_timeout; in rpc_clnt_add_xprt()
3075 reconnect_timeout = xprt->max_reconnect_timeout; in rpc_clnt_add_xprt()
3076 ident = xprt->xprt_class->ident; in rpc_clnt_add_xprt()
3079 if (!xprtargs->ident) in rpc_clnt_add_xprt()
3080 xprtargs->ident = ident; in rpc_clnt_add_xprt()
3081 xprtargs->xprtsec = clnt->cl_xprtsec; in rpc_clnt_add_xprt()
3083 if (IS_ERR(xprt)) { in rpc_clnt_add_xprt()
3087 xprt->resvport = resvport; in rpc_clnt_add_xprt()
3088 xprt->reuseport = reuseport; in rpc_clnt_add_xprt()
3090 if (xprtargs->connect_timeout) in rpc_clnt_add_xprt()
3091 connect_timeout = xprtargs->connect_timeout; in rpc_clnt_add_xprt()
3092 if (xprtargs->reconnect_timeout) in rpc_clnt_add_xprt()
3093 reconnect_timeout = xprtargs->reconnect_timeout; in rpc_clnt_add_xprt()
3094 if (xprt->ops->set_connect_timeout != NULL) in rpc_clnt_add_xprt()
3095 xprt->ops->set_connect_timeout(xprt, in rpc_clnt_add_xprt()
3100 if (setup) { in rpc_clnt_add_xprt()
3102 if (ret != 0) in rpc_clnt_add_xprt()
3125 main_xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); in rpc_xprt_probe_trunked()
3126 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in rpc_xprt_probe_trunked()
3127 status = rpc_cmp_addr_port((struct sockaddr *)&xprt->addr, in rpc_xprt_probe_trunked()
3128 (struct sockaddr *)&main_xprt->addr); in rpc_xprt_probe_trunked()
3131 if (status || !test_bit(XPRT_OFFLINE, &xprt->state)) in rpc_xprt_probe_trunked()
3141 /* rpc_clnt_probe_trunked_xprt -- probe offlined transport for session trunking
3145 * the function rpc_xprt_probe_trunked() which will determine if this
3155 if (ret) in rpc_clnt_probe_trunked_xprts()
3160 if (!xprt) in rpc_clnt_probe_trunked_xprts()
3164 if (ret < 0) in rpc_clnt_probe_trunked_xprts()
3183 main_xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); in rpc_xprt_offline()
3184 xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in rpc_xprt_offline()
3185 err = rpc_cmp_addr_port((struct sockaddr *)&xprt->addr, in rpc_xprt_offline()
3186 (struct sockaddr *)&main_xprt->addr); in rpc_xprt_offline()
3189 if (err) in rpc_xprt_offline()
3192 if (wait_on_bit_lock(&xprt->state, XPRT_LOCKED, TASK_KILLABLE)) { in rpc_xprt_offline()
3193 err = -EINTR; in rpc_xprt_offline()
3205 /* rpc_clnt_manage_trunked_xprts -- offline trunked transports
3230 if (xprt->ops->set_connect_timeout) in rpc_xprt_set_connect_timeout()
3231 xprt->ops->set_connect_timeout(xprt, in rpc_xprt_set_connect_timeout()
3232 timeo->connect_timeout, in rpc_xprt_set_connect_timeout()
3233 timeo->reconnect_timeout); in rpc_xprt_set_connect_timeout()
3255 xprt_switch_put(rcu_dereference(clnt->cl_xpi.xpi_xpswitch)); in rpc_clnt_xprt_switch_put()
3265 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_clnt_xprt_set_online()
3272 if (rpc_clnt_xprt_switch_has_addr(clnt, in rpc_clnt_xprt_switch_add_xprt()
3273 (const struct sockaddr *)&xprt->addr)) { in rpc_clnt_xprt_switch_add_xprt()
3277 rpc_xprt_switch_add_xprt(rcu_dereference(clnt->cl_xpi.xpi_xpswitch), in rpc_clnt_xprt_switch_add_xprt()
3288 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_clnt_xprt_switch_remove_xprt()
3289 rpc_xprt_switch_remove_xprt(rcu_dereference(clnt->cl_xpi.xpi_xpswitch), in rpc_clnt_xprt_switch_remove_xprt()
3291 xps->xps_nunique_destaddr_xprts--; in rpc_clnt_xprt_switch_remove_xprt()
3303 xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); in rpc_clnt_xprt_switch_has_addr()
3310 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
3313 printk(KERN_INFO "-pid- flgs status -client- --rqstp- " in rpc_show_header()
3314 "-timeout ---ops--\n"); in rpc_show_header()
3322 if (RPC_IS_QUEUED(task)) in rpc_show_task()
3323 rpc_waitq = rpc_qname(task->tk_waitqueue); in rpc_show_task()
3326 task->tk_pid, task->tk_flags, task->tk_status, in rpc_show_task()
3327 clnt, task->tk_rqstp, rpc_task_timeout(task), task->tk_ops, in rpc_show_task()
3328 clnt->cl_program->name, clnt->cl_vers, rpc_proc_name(task), in rpc_show_task()
3329 task->tk_action, rpc_waitq); in rpc_show_task()
3339 spin_lock(&sn->rpc_client_lock); in rpc_show_tasks()
3340 list_for_each_entry(clnt, &sn->all_clients, cl_clients) { in rpc_show_tasks()
3341 spin_lock(&clnt->cl_lock); in rpc_show_tasks()
3342 list_for_each_entry(task, &clnt->cl_tasks, tk_task) { in rpc_show_tasks()
3343 if (!header) { in rpc_show_tasks()
3349 spin_unlock(&clnt->cl_lock); in rpc_show_tasks()
3351 spin_unlock(&sn->rpc_client_lock); in rpc_show_tasks()
3355 #if IS_ENABLED(CONFIG_SUNRPC_SWAP)
3367 while (clnt != clnt->cl_parent) in rpc_clnt_swap_activate()
3368 clnt = clnt->cl_parent; in rpc_clnt_swap_activate()
3369 if (atomic_inc_return(&clnt->cl_swapper) == 1) in rpc_clnt_swap_activate()
3388 while (clnt != clnt->cl_parent) in rpc_clnt_swap_deactivate()
3389 clnt = clnt->cl_parent; in rpc_clnt_swap_deactivate()
3390 if (atomic_dec_if_positive(&clnt->cl_swapper) == 0) in rpc_clnt_swap_deactivate()