Lines Matching +full:xps +full:- +full:timer +full:- +full:1
1 // SPDX-License-Identifier: GPL-2.0-only
10 * - When a process places a call, it allocates a request slot if
13 * - Next, the caller puts together the RPC message, stuffs it into
15 * - xprt_transmit sends the message and installs the caller on the
17 * it installs a timer that is run after the packet's timeout has
19 * - When a packet arrives, the data_ready handler walks the list of
21 * caller is woken up, and the timer removed.
22 * - When no reply arrives within the timeout interval, the timer is
25 * of -ETIMEDOUT.
26 * - When the caller receives a notification from RPC that a reply arrived,
32 * Support for async RPC is done through a set of RPC-specific scheduling
36 * Copyright (C) 1995-1997, Olaf Kirch <okir@monad.swb.de>
83 unsigned long timeout = jiffies + req->rq_timeout; in xprt_request_timeout()
85 if (time_before(timeout, req->rq_majortimeo)) in xprt_request_timeout()
87 return req->rq_majortimeo; in xprt_request_timeout()
91 * xprt_register_transport - register a transport implementation
99 * -EEXIST: transport already registered
100 * -EINVAL: transport module being unloaded
107 result = -EEXIST; in xprt_register_transport()
111 if (t->ident == transport->ident) in xprt_register_transport()
115 list_add_tail(&transport->list, &xprt_list); in xprt_register_transport()
117 transport->name); in xprt_register_transport()
127 * xprt_unregister_transport - unregister a transport implementation
132 * -ENOENT: transport never registered
145 transport->name); in xprt_unregister_transport()
146 list_del_init(&transport->list); in xprt_unregister_transport()
150 result = -ENOENT; in xprt_unregister_transport()
161 module_put(t->owner); in xprt_class_release()
170 if (t->ident != ident) in xprt_class_find_by_ident_locked()
172 if (!try_module_get(t->owner)) in xprt_class_find_by_ident_locked()
197 for (i = 0; t->netid[i][0] != '\0'; i++) { in xprt_class_find_by_netid_locked()
198 if (strcmp(t->netid[i], netid) != 0) in xprt_class_find_by_netid_locked()
200 if (!try_module_get(t->owner)) in xprt_class_find_by_netid_locked()
226 * xprt_find_transport_ident - convert a netid into a transport identifier
231 * -ENOENT: transport module not available
240 return -ENOENT; in xprt_find_transport_ident()
241 ret = t->ident; in xprt_find_transport_ident()
249 xprt->snd_task = NULL; in xprt_clear_locked()
250 if (!test_bit(XPRT_CLOSE_WAIT, &xprt->state)) in xprt_clear_locked()
251 clear_bit_unlock(XPRT_LOCKED, &xprt->state); in xprt_clear_locked()
253 queue_work(xprtiod_workqueue, &xprt->task_cleanup); in xprt_clear_locked()
257 * xprt_reserve_xprt - serialize write access to transports
267 struct rpc_rqst *req = task->tk_rqstp; in xprt_reserve_xprt()
269 if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) { in xprt_reserve_xprt()
270 if (task == xprt->snd_task) in xprt_reserve_xprt()
274 if (test_bit(XPRT_WRITE_SPACE, &xprt->state)) in xprt_reserve_xprt()
276 xprt->snd_task = task; in xprt_reserve_xprt()
280 return 1; in xprt_reserve_xprt()
285 task->tk_status = -EAGAIN; in xprt_reserve_xprt()
287 rpc_sleep_on_timeout(&xprt->sending, task, NULL, in xprt_reserve_xprt()
290 rpc_sleep_on(&xprt->sending, task, NULL); in xprt_reserve_xprt()
298 return test_bit(XPRT_CWND_WAIT, &xprt->state); in xprt_need_congestion_window_wait()
304 if (!list_empty(&xprt->xmit_queue)) { in xprt_set_congestion_window_wait()
306 if (list_first_entry(&xprt->xmit_queue, struct rpc_rqst, in xprt_set_congestion_window_wait()
307 rq_xmit)->rq_cong) in xprt_set_congestion_window_wait()
310 set_bit(XPRT_CWND_WAIT, &xprt->state); in xprt_set_congestion_window_wait()
317 clear_bit(XPRT_CWND_WAIT, &xprt->state); in xprt_test_and_clear_congestion_window_wait()
321 * xprt_reserve_xprt_cong - serialize write access to transports
331 struct rpc_rqst *req = task->tk_rqstp; in xprt_reserve_xprt_cong()
333 if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) { in xprt_reserve_xprt_cong()
334 if (task == xprt->snd_task) in xprt_reserve_xprt_cong()
339 xprt->snd_task = task; in xprt_reserve_xprt_cong()
342 if (test_bit(XPRT_WRITE_SPACE, &xprt->state)) in xprt_reserve_xprt_cong()
345 xprt->snd_task = task; in xprt_reserve_xprt_cong()
351 task->tk_status = -EAGAIN; in xprt_reserve_xprt_cong()
353 rpc_sleep_on_timeout(&xprt->sending, task, NULL, in xprt_reserve_xprt_cong()
356 rpc_sleep_on(&xprt->sending, task, NULL); in xprt_reserve_xprt_cong()
360 return 1; in xprt_reserve_xprt_cong()
368 if (test_bit(XPRT_LOCKED, &xprt->state) && xprt->snd_task == task) in xprt_lock_write()
369 return 1; in xprt_lock_write()
370 spin_lock(&xprt->transport_lock); in xprt_lock_write()
371 retval = xprt->ops->reserve_xprt(xprt, task); in xprt_lock_write()
372 spin_unlock(&xprt->transport_lock); in xprt_lock_write()
380 xprt->snd_task = task; in __xprt_lock_write_func()
386 if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) in __xprt_lock_write_next()
388 if (test_bit(XPRT_WRITE_SPACE, &xprt->state)) in __xprt_lock_write_next()
390 if (rpc_wake_up_first_on_wq(xprtiod_workqueue, &xprt->sending, in __xprt_lock_write_next()
399 if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) in __xprt_lock_write_next_cong()
401 if (test_bit(XPRT_WRITE_SPACE, &xprt->state)) in __xprt_lock_write_next_cong()
405 if (rpc_wake_up_first_on_wq(xprtiod_workqueue, &xprt->sending, in __xprt_lock_write_next_cong()
413 * xprt_release_xprt - allow other requests to use a transport
421 if (xprt->snd_task == task) { in xprt_release_xprt()
430 * xprt_release_xprt_cong - allow other requests to use a transport
439 if (xprt->snd_task == task) { in xprt_release_xprt_cong()
449 if (xprt->snd_task != task) in xprt_release_write()
451 spin_lock(&xprt->transport_lock); in xprt_release_write()
452 xprt->ops->release_xprt(xprt, task); in xprt_release_write()
453 spin_unlock(&xprt->transport_lock); in xprt_release_write()
463 if (req->rq_cong) in __xprt_get_cong()
464 return 1; in __xprt_get_cong()
465 trace_xprt_get_cong(xprt, req->rq_task); in __xprt_get_cong()
470 req->rq_cong = 1; in __xprt_get_cong()
471 xprt->cong += RPC_CWNDSCALE; in __xprt_get_cong()
472 return 1; in __xprt_get_cong()
482 if (!req->rq_cong) in __xprt_put_cong()
484 req->rq_cong = 0; in __xprt_put_cong()
485 xprt->cong -= RPC_CWNDSCALE; in __xprt_put_cong()
487 trace_xprt_put_cong(xprt, req->rq_task); in __xprt_put_cong()
492 * xprt_request_get_cong - Request congestion control credits
503 if (req->rq_cong) in xprt_request_get_cong()
505 spin_lock(&xprt->transport_lock); in xprt_request_get_cong()
507 spin_unlock(&xprt->transport_lock); in xprt_request_get_cong()
513 * xprt_release_rqst_cong - housekeeping when request is complete
520 struct rpc_rqst *req = task->tk_rqstp; in xprt_release_rqst_cong()
522 __xprt_put_cong(req->rq_xprt, req); in xprt_release_rqst_cong()
528 if (test_and_clear_bit(XPRT_CWND_WAIT, &xprt->state)) in xprt_clear_congestion_window_wait_locked()
534 * entry on xprt->sending
539 if (test_and_clear_bit(XPRT_CWND_WAIT, &xprt->state)) { in xprt_clear_congestion_window_wait()
540 spin_lock(&xprt->transport_lock); in xprt_clear_congestion_window_wait()
542 spin_unlock(&xprt->transport_lock); in xprt_clear_congestion_window_wait()
547 * xprt_adjust_cwnd - adjust transport congestion window
552 * The transport code maintains an estimate on the maximum number of out-
556 * halved; otherwise, it is incremented by 1/cwnd when
558 * - a reply is received and
559 * - a full number of requests are outstanding and
560 * - the congestion window hasn't been updated recently.
564 struct rpc_rqst *req = task->tk_rqstp; in xprt_adjust_cwnd()
565 unsigned long cwnd = xprt->cwnd; in xprt_adjust_cwnd()
567 if (result >= 0 && cwnd <= xprt->cong) { in xprt_adjust_cwnd()
568 /* The (cwnd >> 1) term makes sure in xprt_adjust_cwnd()
570 cwnd += (RPC_CWNDSCALE * RPC_CWNDSCALE + (cwnd >> 1)) / cwnd; in xprt_adjust_cwnd()
574 } else if (result == -ETIMEDOUT) { in xprt_adjust_cwnd()
575 cwnd >>= 1; in xprt_adjust_cwnd()
580 xprt->cong, xprt->cwnd, cwnd); in xprt_adjust_cwnd()
581 xprt->cwnd = cwnd; in xprt_adjust_cwnd()
587 * xprt_wake_pending_tasks - wake all tasks on a transport's pending queue
595 rpc_wake_up_status(&xprt->pending, status); in xprt_wake_pending_tasks()
597 rpc_wake_up(&xprt->pending); in xprt_wake_pending_tasks()
602 * xprt_wait_for_buffer_space - wait for transport output buffer to clear
605 * Note that we only set the timer for the case of RPC_IS_SOFT(), since
611 set_bit(XPRT_WRITE_SPACE, &xprt->state); in xprt_wait_for_buffer_space()
618 if (test_and_clear_bit(XPRT_WRITE_SPACE, &xprt->state)) { in xprt_clear_write_space_locked()
628 * xprt_write_space - wake the task waiting for transport output buffer space
637 if (!test_bit(XPRT_WRITE_SPACE, &xprt->state)) in xprt_write_space()
639 spin_lock(&xprt->transport_lock); in xprt_write_space()
641 spin_unlock(&xprt->transport_lock); in xprt_write_space()
648 s64 delta = ktime_to_ns(ktime_get() - abstime); in xprt_abs_ktime_to_jiffies()
650 jiffies - nsecs_to_jiffies(delta) : in xprt_abs_ktime_to_jiffies()
651 jiffies + nsecs_to_jiffies(-delta); in xprt_abs_ktime_to_jiffies()
657 unsigned long majortimeo = req->rq_timeout; in xprt_calc_majortimeo()
659 if (to->to_exponential) in xprt_calc_majortimeo()
660 majortimeo <<= to->to_retries; in xprt_calc_majortimeo()
662 majortimeo += to->to_increment * to->to_retries; in xprt_calc_majortimeo()
663 if (majortimeo > to->to_maxval || majortimeo == 0) in xprt_calc_majortimeo()
664 majortimeo = to->to_maxval; in xprt_calc_majortimeo()
671 req->rq_majortimeo += xprt_calc_majortimeo(req, to); in xprt_reset_majortimeo()
676 req->rq_minortimeo += req->rq_timeout; in xprt_reset_minortimeo()
683 struct rpc_xprt *xprt = req->rq_xprt; in xprt_init_majortimeo()
688 time_init = xprt_abs_ktime_to_jiffies(task->tk_start); in xprt_init_majortimeo()
690 req->rq_timeout = to->to_initval; in xprt_init_majortimeo()
691 req->rq_majortimeo = time_init + xprt_calc_majortimeo(req, to); in xprt_init_majortimeo()
692 req->rq_minortimeo = time_init + req->rq_timeout; in xprt_init_majortimeo()
696 * xprt_adjust_timeout - adjust timeout values for next retransmit
702 struct rpc_xprt *xprt = req->rq_xprt; in xprt_adjust_timeout()
703 const struct rpc_timeout *to = req->rq_task->tk_client->cl_timeout; in xprt_adjust_timeout()
706 if (time_before(jiffies, req->rq_majortimeo)) { in xprt_adjust_timeout()
707 if (time_before(jiffies, req->rq_minortimeo)) in xprt_adjust_timeout()
709 if (to->to_exponential) in xprt_adjust_timeout()
710 req->rq_timeout <<= 1; in xprt_adjust_timeout()
712 req->rq_timeout += to->to_increment; in xprt_adjust_timeout()
713 if (to->to_maxval && req->rq_timeout >= to->to_maxval) in xprt_adjust_timeout()
714 req->rq_timeout = to->to_maxval; in xprt_adjust_timeout()
715 req->rq_retries++; in xprt_adjust_timeout()
717 req->rq_timeout = to->to_initval; in xprt_adjust_timeout()
718 req->rq_retries = 0; in xprt_adjust_timeout()
721 spin_lock(&xprt->transport_lock); in xprt_adjust_timeout()
722 rpc_init_rtt(req->rq_task->tk_client->cl_rtt, to->to_initval); in xprt_adjust_timeout()
723 spin_unlock(&xprt->transport_lock); in xprt_adjust_timeout()
724 status = -ETIMEDOUT; in xprt_adjust_timeout()
728 if (req->rq_timeout == 0) { in xprt_adjust_timeout()
730 req->rq_timeout = 5 * HZ; in xprt_adjust_timeout()
742 xprt->connect_cookie++; in xprt_autoclose()
744 clear_bit(XPRT_CLOSE_WAIT, &xprt->state); in xprt_autoclose()
745 xprt->ops->close(xprt); in xprt_autoclose()
747 wake_up_bit(&xprt->state, XPRT_LOCKED); in xprt_autoclose()
752 * xprt_disconnect_done - mark a transport as disconnected
759 spin_lock(&xprt->transport_lock); in xprt_disconnect_done()
763 xprt_wake_pending_tasks(xprt, -ENOTCONN); in xprt_disconnect_done()
764 spin_unlock(&xprt->transport_lock); in xprt_disconnect_done()
769 * xprt_schedule_autoclose_locked - Try to schedule an autoclose RPC call
774 if (test_and_set_bit(XPRT_CLOSE_WAIT, &xprt->state)) in xprt_schedule_autoclose_locked()
776 if (test_and_set_bit(XPRT_LOCKED, &xprt->state) == 0) in xprt_schedule_autoclose_locked()
777 queue_work(xprtiod_workqueue, &xprt->task_cleanup); in xprt_schedule_autoclose_locked()
778 else if (xprt->snd_task && !test_bit(XPRT_SND_IS_COOKIE, &xprt->state)) in xprt_schedule_autoclose_locked()
779 rpc_wake_up_queued_task_set_status(&xprt->pending, in xprt_schedule_autoclose_locked()
780 xprt->snd_task, -ENOTCONN); in xprt_schedule_autoclose_locked()
784 * xprt_force_disconnect - force a transport to disconnect
793 spin_lock(&xprt->transport_lock); in xprt_force_disconnect()
795 spin_unlock(&xprt->transport_lock); in xprt_force_disconnect()
802 return READ_ONCE(xprt->connect_cookie); in xprt_connect_cookie()
808 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_retransmit_after_disconnect()
809 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_retransmit_after_disconnect()
811 return req->rq_connect_cookie != xprt_connect_cookie(xprt) || in xprt_request_retransmit_after_disconnect()
816 * xprt_conditional_disconnect - force a transport to disconnect
829 spin_lock(&xprt->transport_lock); in xprt_conditional_disconnect()
830 if (cookie != xprt->connect_cookie) in xprt_conditional_disconnect()
832 if (test_bit(XPRT_CLOSING, &xprt->state)) in xprt_conditional_disconnect()
836 spin_unlock(&xprt->transport_lock); in xprt_conditional_disconnect()
842 return xprt->idle_timeout != 0; in xprt_has_timer()
847 __must_hold(&xprt->transport_lock) in xprt_schedule_autodisconnect()
849 xprt->last_used = jiffies; in xprt_schedule_autodisconnect()
850 if (RB_EMPTY_ROOT(&xprt->recv_queue) && xprt_has_timer(xprt)) in xprt_schedule_autodisconnect()
851 mod_timer(&xprt->timer, xprt->last_used + xprt->idle_timeout); in xprt_schedule_autodisconnect()
857 struct rpc_xprt *xprt = from_timer(xprt, t, timer); in xprt_init_autodisconnect()
859 if (!RB_EMPTY_ROOT(&xprt->recv_queue)) in xprt_init_autodisconnect()
861 /* Reset xprt->last_used to avoid connect/autodisconnect cycling */ in xprt_init_autodisconnect()
862 xprt->last_used = jiffies; in xprt_init_autodisconnect()
863 if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) in xprt_init_autodisconnect()
865 queue_work(xprtiod_workqueue, &xprt->task_cleanup); in xprt_init_autodisconnect()
872 should_fail(&fail_sunrpc.attr, 1)) in xprt_inject_disconnect()
873 xprt->ops->inject_disconnect(xprt); in xprt_inject_disconnect()
887 spin_lock(&xprt->transport_lock); in xprt_lock_connect()
888 if (!test_bit(XPRT_LOCKED, &xprt->state)) in xprt_lock_connect()
890 if (xprt->snd_task != task) in xprt_lock_connect()
892 set_bit(XPRT_SND_IS_COOKIE, &xprt->state); in xprt_lock_connect()
893 xprt->snd_task = cookie; in xprt_lock_connect()
896 spin_unlock(&xprt->transport_lock); in xprt_lock_connect()
903 spin_lock(&xprt->transport_lock); in xprt_unlock_connect()
904 if (xprt->snd_task != cookie) in xprt_unlock_connect()
906 if (!test_bit(XPRT_LOCKED, &xprt->state)) in xprt_unlock_connect()
908 xprt->snd_task =NULL; in xprt_unlock_connect()
909 clear_bit(XPRT_SND_IS_COOKIE, &xprt->state); in xprt_unlock_connect()
910 xprt->ops->release_xprt(xprt, NULL); in xprt_unlock_connect()
913 spin_unlock(&xprt->transport_lock); in xprt_unlock_connect()
914 wake_up_bit(&xprt->state, XPRT_LOCKED); in xprt_unlock_connect()
919 * xprt_connect - schedule a transport connect operation
925 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in xprt_connect()
930 task->tk_status = -EAGAIN; in xprt_connect()
936 if (!xprt_connected(xprt) && !test_bit(XPRT_CLOSE_WAIT, &xprt->state)) { in xprt_connect()
937 task->tk_rqstp->rq_connect_cookie = xprt->connect_cookie; in xprt_connect()
938 rpc_sleep_on_timeout(&xprt->pending, task, NULL, in xprt_connect()
939 xprt_request_timeout(task->tk_rqstp)); in xprt_connect()
941 if (test_bit(XPRT_CLOSING, &xprt->state)) in xprt_connect()
947 xprt->stat.connect_start = jiffies; in xprt_connect()
948 xprt->ops->connect(xprt, task); in xprt_connect()
951 task->tk_status = 0; in xprt_connect()
952 rpc_wake_up_queued_task(&xprt->pending, task); in xprt_connect()
959 * xprt_reconnect_delay - compute the wait before scheduling a connect
967 start = xprt->stat.connect_start + xprt->reestablish_timeout; in xprt_reconnect_delay()
969 return start - now; in xprt_reconnect_delay()
975 * xprt_reconnect_backoff - compute the new re-establish timeout
982 xprt->reestablish_timeout <<= 1; in xprt_reconnect_backoff()
983 if (xprt->reestablish_timeout > xprt->max_reconnect_timeout) in xprt_reconnect_backoff()
984 xprt->reestablish_timeout = xprt->max_reconnect_timeout; in xprt_reconnect_backoff()
985 if (xprt->reestablish_timeout < init_to) in xprt_reconnect_backoff()
986 xprt->reestablish_timeout = init_to; in xprt_reconnect_backoff()
1008 struct rb_node *n = xprt->recv_queue.rb_node; in xprt_request_rb_find()
1013 switch (xprt_xid_cmp(xid, req->rq_xid)) { in xprt_request_rb_find()
1015 n = n->rb_left; in xprt_request_rb_find()
1018 n = n->rb_right; in xprt_request_rb_find()
1030 struct rb_node **p = &xprt->recv_queue.rb_node; in xprt_request_rb_insert()
1037 switch(xprt_xid_cmp(new->rq_xid, req->rq_xid)) { in xprt_request_rb_insert()
1039 p = &n->rb_left; in xprt_request_rb_insert()
1042 p = &n->rb_right; in xprt_request_rb_insert()
1049 rb_link_node(&new->rq_recv, n, p); in xprt_request_rb_insert()
1050 rb_insert_color(&new->rq_recv, &xprt->recv_queue); in xprt_request_rb_insert()
1056 rb_erase(&req->rq_recv, &xprt->recv_queue); in xprt_request_rb_remove()
1060 * xprt_lookup_rqst - find an RPC request corresponding to an XID
1064 * Caller holds xprt->queue_lock.
1073 entry->rq_rtt = ktime_sub(ktime_get(), entry->rq_xtime); in xprt_lookup_rqst()
1079 trace_xprt_lookup_rqst(xprt, xid, -ENOENT); in xprt_lookup_rqst()
1080 xprt->stat.bad_xids++; in xprt_lookup_rqst()
1088 return atomic_read(&req->rq_pin) != 0; in xprt_is_pinned_rqst()
1092 * xprt_pin_rqst - Pin a request on the transport receive list
1096 * so should be holding xprt->queue_lock.
1100 atomic_inc(&req->rq_pin); in xprt_pin_rqst()
1105 * xprt_unpin_rqst - Unpin a request on the transport receive list
1108 * Caller should be holding xprt->queue_lock.
1112 if (!test_bit(RPC_TASK_MSG_PIN_WAIT, &req->rq_task->tk_runstate)) { in xprt_unpin_rqst()
1113 atomic_dec(&req->rq_pin); in xprt_unpin_rqst()
1116 if (atomic_dec_and_test(&req->rq_pin)) in xprt_unpin_rqst()
1117 wake_up_var(&req->rq_pin); in xprt_unpin_rqst()
1123 wait_var_event(&req->rq_pin, !xprt_is_pinned_rqst(req)); in xprt_wait_on_pinned_rqst()
1129 return !test_bit(RPC_TASK_NEED_RECV, &task->tk_runstate) && in xprt_request_data_received()
1130 READ_ONCE(task->tk_rqstp->rq_reply_bytes_recvd) != 0; in xprt_request_data_received()
1136 return !test_bit(RPC_TASK_NEED_RECV, &task->tk_runstate) && in xprt_request_need_enqueue_receive()
1137 READ_ONCE(task->tk_rqstp->rq_reply_bytes_recvd) == 0; in xprt_request_need_enqueue_receive()
1141 * xprt_request_enqueue_receive - Add an request to the receive queue
1148 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_enqueue_receive()
1149 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_enqueue_receive()
1155 ret = xprt_request_prepare(task->tk_rqstp, &req->rq_rcv_buf); in xprt_request_enqueue_receive()
1158 spin_lock(&xprt->queue_lock); in xprt_request_enqueue_receive()
1161 memcpy(&req->rq_private_buf, &req->rq_rcv_buf, in xprt_request_enqueue_receive()
1162 sizeof(req->rq_private_buf)); in xprt_request_enqueue_receive()
1166 set_bit(RPC_TASK_NEED_RECV, &task->tk_runstate); in xprt_request_enqueue_receive()
1167 spin_unlock(&xprt->queue_lock); in xprt_request_enqueue_receive()
1170 del_timer_sync(&xprt->timer); in xprt_request_enqueue_receive()
1175 * xprt_request_dequeue_receive_locked - Remove a request from the receive queue
1178 * Caller must hold xprt->queue_lock.
1183 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_dequeue_receive_locked()
1185 if (test_and_clear_bit(RPC_TASK_NEED_RECV, &task->tk_runstate)) in xprt_request_dequeue_receive_locked()
1186 xprt_request_rb_remove(req->rq_xprt, req); in xprt_request_dequeue_receive_locked()
1190 * xprt_update_rtt - Update RPC RTT statistics
1193 * Caller holds xprt->queue_lock.
1197 struct rpc_rqst *req = task->tk_rqstp; in xprt_update_rtt()
1198 struct rpc_rtt *rtt = task->tk_client->cl_rtt; in xprt_update_rtt()
1199 unsigned int timer = task->tk_msg.rpc_proc->p_timer; in xprt_update_rtt() local
1200 long m = usecs_to_jiffies(ktime_to_us(req->rq_rtt)); in xprt_update_rtt()
1202 if (timer) { in xprt_update_rtt()
1203 if (req->rq_ntrans == 1) in xprt_update_rtt()
1204 rpc_update_rtt(rtt, timer, m); in xprt_update_rtt()
1205 rpc_set_timeo(rtt, timer, req->rq_ntrans - 1); in xprt_update_rtt()
1211 * xprt_complete_rqst - called when reply processing is complete
1215 * Caller holds xprt->queue_lock.
1219 struct rpc_rqst *req = task->tk_rqstp; in xprt_complete_rqst()
1220 struct rpc_xprt *xprt = req->rq_xprt; in xprt_complete_rqst()
1222 xprt->stat.recvs++; in xprt_complete_rqst()
1224 xdr_free_bvec(&req->rq_rcv_buf); in xprt_complete_rqst()
1225 req->rq_private_buf.bvec = NULL; in xprt_complete_rqst()
1226 req->rq_private_buf.len = copied; in xprt_complete_rqst()
1228 /* req->rq_reply_bytes_recvd */ in xprt_complete_rqst()
1230 req->rq_reply_bytes_recvd = copied; in xprt_complete_rqst()
1232 rpc_wake_up_queued_task(&xprt->pending, task); in xprt_complete_rqst()
1238 struct rpc_rqst *req = task->tk_rqstp; in xprt_timer()
1239 struct rpc_xprt *xprt = req->rq_xprt; in xprt_timer()
1241 if (task->tk_status != -ETIMEDOUT) in xprt_timer()
1244 trace_xprt_timer(xprt, req->rq_xid, task->tk_status); in xprt_timer()
1245 if (!req->rq_reply_bytes_recvd) { in xprt_timer()
1246 if (xprt->ops->timer) in xprt_timer()
1247 xprt->ops->timer(xprt, task); in xprt_timer()
1249 task->tk_status = 0; in xprt_timer()
1253 * xprt_wait_for_reply_request_def - wait for reply
1258 * the retransmit timeout based on round-trip time estimation,
1263 struct rpc_rqst *req = task->tk_rqstp; in xprt_wait_for_reply_request_def()
1265 rpc_sleep_on_timeout(&req->rq_xprt->pending, task, xprt_timer, in xprt_wait_for_reply_request_def()
1271 * xprt_wait_for_reply_request_rtt - wait for reply using RTT estimator
1279 int timer = task->tk_msg.rpc_proc->p_timer; in xprt_wait_for_reply_request_rtt() local
1280 struct rpc_clnt *clnt = task->tk_client; in xprt_wait_for_reply_request_rtt()
1281 struct rpc_rtt *rtt = clnt->cl_rtt; in xprt_wait_for_reply_request_rtt()
1282 struct rpc_rqst *req = task->tk_rqstp; in xprt_wait_for_reply_request_rtt()
1283 unsigned long max_timeout = clnt->cl_timeout->to_maxval; in xprt_wait_for_reply_request_rtt()
1286 timeout = rpc_calc_rto(rtt, timer); in xprt_wait_for_reply_request_rtt()
1287 timeout <<= rpc_ntimeo(rtt, timer) + req->rq_retries; in xprt_wait_for_reply_request_rtt()
1290 rpc_sleep_on_timeout(&req->rq_xprt->pending, task, xprt_timer, in xprt_wait_for_reply_request_rtt()
1296 * xprt_request_wait_receive - wait for the reply to an RPC request
1302 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_wait_receive()
1303 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_wait_receive()
1305 if (!test_bit(RPC_TASK_NEED_RECV, &task->tk_runstate)) in xprt_request_wait_receive()
1310 * req->rq_reply_bytes_recvd, and the call to rpc_sleep_on(). in xprt_request_wait_receive()
1312 spin_lock(&xprt->queue_lock); in xprt_request_wait_receive()
1313 if (test_bit(RPC_TASK_NEED_RECV, &task->tk_runstate)) { in xprt_request_wait_receive()
1314 xprt->ops->wait_for_reply_request(task); in xprt_request_wait_receive()
1321 rpc_wake_up_queued_task_set_status(&xprt->pending, in xprt_request_wait_receive()
1322 task, -ENOTCONN); in xprt_request_wait_receive()
1324 spin_unlock(&xprt->queue_lock); in xprt_request_wait_receive()
1330 return !test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate); in xprt_request_need_enqueue_transmit()
1334 * xprt_request_enqueue_transmit - queue a task for transmission
1342 struct rpc_rqst *pos, *req = task->tk_rqstp; in xprt_request_enqueue_transmit()
1343 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_enqueue_transmit()
1347 ret = xprt_request_prepare(task->tk_rqstp, &req->rq_snd_buf); in xprt_request_enqueue_transmit()
1349 task->tk_status = ret; in xprt_request_enqueue_transmit()
1352 req->rq_bytes_sent = 0; in xprt_request_enqueue_transmit()
1353 spin_lock(&xprt->queue_lock); in xprt_request_enqueue_transmit()
1358 if (req->rq_cong) { in xprt_request_enqueue_transmit()
1360 list_for_each_entry(pos, &xprt->xmit_queue, rq_xmit) { in xprt_request_enqueue_transmit()
1361 if (pos->rq_cong) in xprt_request_enqueue_transmit()
1364 list_add_tail(&req->rq_xmit, &pos->rq_xmit); in xprt_request_enqueue_transmit()
1365 INIT_LIST_HEAD(&req->rq_xmit2); in xprt_request_enqueue_transmit()
1368 } else if (!req->rq_seqno) { in xprt_request_enqueue_transmit()
1369 list_for_each_entry(pos, &xprt->xmit_queue, rq_xmit) { in xprt_request_enqueue_transmit()
1370 if (pos->rq_task->tk_owner != task->tk_owner) in xprt_request_enqueue_transmit()
1372 list_add_tail(&req->rq_xmit2, &pos->rq_xmit2); in xprt_request_enqueue_transmit()
1373 INIT_LIST_HEAD(&req->rq_xmit); in xprt_request_enqueue_transmit()
1377 list_add_tail(&req->rq_xmit, &xprt->xmit_queue); in xprt_request_enqueue_transmit()
1378 INIT_LIST_HEAD(&req->rq_xmit2); in xprt_request_enqueue_transmit()
1380 atomic_long_inc(&xprt->xmit_queuelen); in xprt_request_enqueue_transmit()
1381 set_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate); in xprt_request_enqueue_transmit()
1382 spin_unlock(&xprt->queue_lock); in xprt_request_enqueue_transmit()
1387 * xprt_request_dequeue_transmit_locked - remove a task from the transmission queue
1391 * Caller must hold xprt->queue_lock
1396 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_dequeue_transmit_locked()
1398 if (!test_and_clear_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) in xprt_request_dequeue_transmit_locked()
1400 if (!list_empty(&req->rq_xmit)) { in xprt_request_dequeue_transmit_locked()
1401 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_dequeue_transmit_locked()
1403 if (list_is_first(&req->rq_xmit, &xprt->xmit_queue) && in xprt_request_dequeue_transmit_locked()
1404 xprt->ops->abort_send_request) in xprt_request_dequeue_transmit_locked()
1405 xprt->ops->abort_send_request(req); in xprt_request_dequeue_transmit_locked()
1407 list_del(&req->rq_xmit); in xprt_request_dequeue_transmit_locked()
1408 if (!list_empty(&req->rq_xmit2)) { in xprt_request_dequeue_transmit_locked()
1409 struct rpc_rqst *next = list_first_entry(&req->rq_xmit2, in xprt_request_dequeue_transmit_locked()
1411 list_del(&req->rq_xmit2); in xprt_request_dequeue_transmit_locked()
1412 list_add_tail(&next->rq_xmit, &next->rq_xprt->xmit_queue); in xprt_request_dequeue_transmit_locked()
1415 list_del(&req->rq_xmit2); in xprt_request_dequeue_transmit_locked()
1416 atomic_long_dec(&req->rq_xprt->xmit_queuelen); in xprt_request_dequeue_transmit_locked()
1417 xdr_free_bvec(&req->rq_snd_buf); in xprt_request_dequeue_transmit_locked()
1421 * xprt_request_dequeue_transmit - remove a task from the transmission queue
1429 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_dequeue_transmit()
1430 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_dequeue_transmit()
1432 spin_lock(&xprt->queue_lock); in xprt_request_dequeue_transmit()
1434 spin_unlock(&xprt->queue_lock); in xprt_request_dequeue_transmit()
1438 * xprt_request_dequeue_xprt - remove a task from the transmit+receive queue
1447 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_dequeue_xprt()
1448 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_dequeue_xprt()
1450 if (test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate) || in xprt_request_dequeue_xprt()
1451 test_bit(RPC_TASK_NEED_RECV, &task->tk_runstate) || in xprt_request_dequeue_xprt()
1453 spin_lock(&xprt->queue_lock); in xprt_request_dequeue_xprt()
1455 set_bit(RPC_TASK_MSG_PIN_WAIT, &task->tk_runstate); in xprt_request_dequeue_xprt()
1456 spin_unlock(&xprt->queue_lock); in xprt_request_dequeue_xprt()
1458 spin_lock(&xprt->queue_lock); in xprt_request_dequeue_xprt()
1459 clear_bit(RPC_TASK_MSG_PIN_WAIT, &task->tk_runstate); in xprt_request_dequeue_xprt()
1463 spin_unlock(&xprt->queue_lock); in xprt_request_dequeue_xprt()
1464 xdr_free_bvec(&req->rq_rcv_buf); in xprt_request_dequeue_xprt()
1469 * xprt_request_prepare - prepare an encoded request for transport
1480 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_prepare()
1482 if (xprt->ops->prepare_request) in xprt_request_prepare()
1483 return xprt->ops->prepare_request(req, buf); in xprt_request_prepare()
1488 * xprt_request_need_retransmit - Test if a task needs retransmission
1500 * xprt_prepare_transmit - reserve the transport before sending a request
1506 struct rpc_rqst *req = task->tk_rqstp; in xprt_prepare_transmit()
1507 struct rpc_xprt *xprt = req->rq_xprt; in xprt_prepare_transmit()
1511 if (!test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) in xprt_prepare_transmit()
1512 rpc_wake_up_queued_task_set_status(&xprt->sending, in xprt_prepare_transmit()
1517 if (atomic_read(&xprt->swapper)) in xprt_prepare_transmit()
1519 current->flags |= PF_MEMALLOC; in xprt_prepare_transmit()
1525 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in xprt_end_transmit()
1532 * xprt_request_transmit - send an RPC request on a transport
1544 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_transmit()
1545 struct rpc_task *task = req->rq_task; in xprt_request_transmit()
1550 if (test_bit(XPRT_CLOSE_WAIT, &xprt->state)) in xprt_request_transmit()
1551 return -ENOTCONN; in xprt_request_transmit()
1553 if (!req->rq_bytes_sent) { in xprt_request_transmit()
1560 status = -EBADMSG; in xprt_request_transmit()
1564 status = -ERESTARTSYS; in xprt_request_transmit()
1570 * Update req->rq_ntrans before transmitting to avoid races with in xprt_request_transmit()
1574 req->rq_ntrans++; in xprt_request_transmit()
1576 trace_rpc_xdr_sendto(task, &req->rq_snd_buf); in xprt_request_transmit()
1577 connect_cookie = xprt->connect_cookie; in xprt_request_transmit()
1578 status = xprt->ops->send_request(req); in xprt_request_transmit()
1580 req->rq_ntrans--; in xprt_request_transmit()
1586 task->tk_client->cl_stats->rpcretrans++; in xprt_request_transmit()
1592 task->tk_flags |= RPC_TASK_SENT; in xprt_request_transmit()
1593 spin_lock(&xprt->transport_lock); in xprt_request_transmit()
1595 xprt->stat.sends++; in xprt_request_transmit()
1596 xprt->stat.req_u += xprt->stat.sends - xprt->stat.recvs; in xprt_request_transmit()
1597 xprt->stat.bklog_u += xprt->backlog.qlen; in xprt_request_transmit()
1598 xprt->stat.sending_u += xprt->sending.qlen; in xprt_request_transmit()
1599 xprt->stat.pending_u += xprt->pending.qlen; in xprt_request_transmit()
1600 spin_unlock(&xprt->transport_lock); in xprt_request_transmit()
1602 req->rq_connect_cookie = connect_cookie; in xprt_request_transmit()
1606 rpc_wake_up_queued_task_set_status(&xprt->sending, task, status); in xprt_request_transmit()
1611 * xprt_transmit - send an RPC request on a transport
1622 struct rpc_rqst *next, *req = task->tk_rqstp; in xprt_transmit()
1623 struct rpc_xprt *xprt = req->rq_xprt; in xprt_transmit()
1626 spin_lock(&xprt->queue_lock); in xprt_transmit()
1628 next = list_first_entry_or_null(&xprt->xmit_queue, in xprt_transmit()
1633 spin_unlock(&xprt->queue_lock); in xprt_transmit()
1635 if (status == -EBADMSG && next != req) in xprt_transmit()
1637 spin_lock(&xprt->queue_lock); in xprt_transmit()
1640 if (test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) in xprt_transmit()
1641 task->tk_status = status; in xprt_transmit()
1646 !test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) in xprt_transmit()
1648 cond_resched_lock(&xprt->queue_lock); in xprt_transmit()
1650 spin_unlock(&xprt->queue_lock); in xprt_transmit()
1655 if (task->tk_rqstp) in xprt_complete_request_init()
1661 set_bit(XPRT_CONGESTED, &xprt->state); in xprt_add_backlog()
1662 rpc_sleep_on(&xprt->backlog, task, xprt_complete_request_init); in xprt_add_backlog()
1670 if (task->tk_rqstp == NULL) { in __xprt_set_rq()
1672 task->tk_rqstp = req; in __xprt_set_rq()
1680 if (rpc_wake_up_first(&xprt->backlog, __xprt_set_rq, req) == NULL) { in xprt_wake_up_backlog()
1681 clear_bit(XPRT_CONGESTED, &xprt->state); in xprt_wake_up_backlog()
1692 if (!test_bit(XPRT_CONGESTED, &xprt->state)) in xprt_throttle_congested()
1694 spin_lock(&xprt->reserve_lock); in xprt_throttle_congested()
1695 if (test_bit(XPRT_CONGESTED, &xprt->state)) { in xprt_throttle_congested()
1699 spin_unlock(&xprt->reserve_lock); in xprt_throttle_congested()
1706 struct rpc_rqst *req = ERR_PTR(-EAGAIN); in xprt_dynamic_alloc_slot()
1708 if (xprt->num_reqs >= xprt->max_reqs) in xprt_dynamic_alloc_slot()
1710 ++xprt->num_reqs; in xprt_dynamic_alloc_slot()
1711 spin_unlock(&xprt->reserve_lock); in xprt_dynamic_alloc_slot()
1713 spin_lock(&xprt->reserve_lock); in xprt_dynamic_alloc_slot()
1716 --xprt->num_reqs; in xprt_dynamic_alloc_slot()
1717 req = ERR_PTR(-ENOMEM); in xprt_dynamic_alloc_slot()
1724 if (xprt->num_reqs > xprt->min_reqs) { in xprt_dynamic_free_slot()
1725 --xprt->num_reqs; in xprt_dynamic_free_slot()
1736 spin_lock(&xprt->reserve_lock); in xprt_alloc_slot()
1737 if (!list_empty(&xprt->free)) { in xprt_alloc_slot()
1738 req = list_entry(xprt->free.next, struct rpc_rqst, rq_list); in xprt_alloc_slot()
1739 list_del(&req->rq_list); in xprt_alloc_slot()
1746 case -ENOMEM: in xprt_alloc_slot()
1749 task->tk_status = -ENOMEM; in xprt_alloc_slot()
1751 case -EAGAIN: in xprt_alloc_slot()
1756 task->tk_status = -EAGAIN; in xprt_alloc_slot()
1758 spin_unlock(&xprt->reserve_lock); in xprt_alloc_slot()
1761 xprt->stat.max_slots = max_t(unsigned int, xprt->stat.max_slots, in xprt_alloc_slot()
1762 xprt->num_reqs); in xprt_alloc_slot()
1763 spin_unlock(&xprt->reserve_lock); in xprt_alloc_slot()
1765 task->tk_status = 0; in xprt_alloc_slot()
1766 task->tk_rqstp = req; in xprt_alloc_slot()
1772 spin_lock(&xprt->reserve_lock); in xprt_free_slot()
1776 list_add(&req->rq_list, &xprt->free); in xprt_free_slot()
1778 spin_unlock(&xprt->reserve_lock); in xprt_free_slot()
1785 while (!list_empty(&xprt->free)) { in xprt_free_all_slots()
1786 req = list_first_entry(&xprt->free, struct rpc_rqst, rq_list); in xprt_free_all_slots()
1787 list_del(&req->rq_list); in xprt_free_all_slots()
1807 xprt->id = id; in xprt_alloc_id()
1813 ida_free(&rpc_xprt_ids, xprt->id); in xprt_free_id()
1835 list_add(&req->rq_list, &xprt->free); in xprt_alloc()
1837 xprt->max_reqs = max_t(unsigned int, max_alloc, num_prealloc); in xprt_alloc()
1838 xprt->min_reqs = num_prealloc; in xprt_alloc()
1839 xprt->num_reqs = num_prealloc; in xprt_alloc()
1852 put_net_track(xprt->xprt_net, &xprt->ns_tracker); in xprt_free()
1863 req->rq_connect_cookie = xprt_connect_cookie(xprt) - 1; in xprt_init_connect_cookie()
1871 spin_lock(&xprt->reserve_lock); in xprt_alloc_xid()
1872 xid = (__force __be32)xprt->xid++; in xprt_alloc_xid()
1873 spin_unlock(&xprt->reserve_lock); in xprt_alloc_xid()
1880 xprt->xid = get_random_u32(); in xprt_init_xid()
1886 struct rpc_xprt *xprt = task->tk_xprt; in xprt_request_init()
1887 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_init()
1889 req->rq_task = task; in xprt_request_init()
1890 req->rq_xprt = xprt; in xprt_request_init()
1891 req->rq_buffer = NULL; in xprt_request_init()
1892 req->rq_xid = xprt_alloc_xid(xprt); in xprt_request_init()
1894 req->rq_snd_buf.len = 0; in xprt_request_init()
1895 req->rq_snd_buf.buflen = 0; in xprt_request_init()
1896 req->rq_rcv_buf.len = 0; in xprt_request_init()
1897 req->rq_rcv_buf.buflen = 0; in xprt_request_init()
1898 req->rq_snd_buf.bvec = NULL; in xprt_request_init()
1899 req->rq_rcv_buf.bvec = NULL; in xprt_request_init()
1900 req->rq_release_snd_buf = NULL; in xprt_request_init()
1901 xprt_init_majortimeo(task, req, task->tk_client->cl_timeout); in xprt_request_init()
1909 xprt->ops->alloc_slot(xprt, task); in xprt_do_reserve()
1910 if (task->tk_rqstp != NULL) in xprt_do_reserve()
1915 * xprt_reserve - allocate an RPC request slot
1924 struct rpc_xprt *xprt = task->tk_xprt; in xprt_reserve()
1926 task->tk_status = 0; in xprt_reserve()
1927 if (task->tk_rqstp != NULL) in xprt_reserve()
1930 task->tk_status = -EAGAIN; in xprt_reserve()
1936 * xprt_retry_reserve - allocate an RPC request slot
1946 struct rpc_xprt *xprt = task->tk_xprt; in xprt_retry_reserve()
1948 task->tk_status = 0; in xprt_retry_reserve()
1949 if (task->tk_rqstp != NULL) in xprt_retry_reserve()
1952 task->tk_status = -EAGAIN; in xprt_retry_reserve()
1957 * xprt_release - release an RPC request slot
1964 struct rpc_rqst *req = task->tk_rqstp; in xprt_release()
1967 if (task->tk_client) { in xprt_release()
1968 xprt = task->tk_xprt; in xprt_release()
1974 xprt = req->rq_xprt; in xprt_release()
1976 spin_lock(&xprt->transport_lock); in xprt_release()
1977 xprt->ops->release_xprt(xprt, task); in xprt_release()
1978 if (xprt->ops->release_request) in xprt_release()
1979 xprt->ops->release_request(task); in xprt_release()
1981 spin_unlock(&xprt->transport_lock); in xprt_release()
1982 if (req->rq_buffer) in xprt_release()
1983 xprt->ops->buf_free(task); in xprt_release()
1984 if (req->rq_cred != NULL) in xprt_release()
1985 put_rpccred(req->rq_cred); in xprt_release()
1986 if (req->rq_release_snd_buf) in xprt_release()
1987 req->rq_release_snd_buf(req); in xprt_release()
1989 task->tk_rqstp = NULL; in xprt_release()
1991 xprt->ops->free_slot(xprt, req); in xprt_release()
2001 struct xdr_buf *xbufp = &req->rq_snd_buf; in xprt_init_bc_request()
2003 task->tk_rqstp = req; in xprt_init_bc_request()
2004 req->rq_task = task; in xprt_init_bc_request()
2005 xprt_init_connect_cookie(req, req->rq_xprt); in xprt_init_bc_request()
2010 xbufp->len = xbufp->head[0].iov_len + xbufp->page_len + in xprt_init_bc_request()
2011 xbufp->tail[0].iov_len; in xprt_init_bc_request()
2024 kref_init(&xprt->kref); in xprt_init()
2026 spin_lock_init(&xprt->transport_lock); in xprt_init()
2027 spin_lock_init(&xprt->reserve_lock); in xprt_init()
2028 spin_lock_init(&xprt->queue_lock); in xprt_init()
2030 INIT_LIST_HEAD(&xprt->free); in xprt_init()
2031 xprt->recv_queue = RB_ROOT; in xprt_init()
2032 INIT_LIST_HEAD(&xprt->xmit_queue); in xprt_init()
2034 spin_lock_init(&xprt->bc_pa_lock); in xprt_init()
2035 INIT_LIST_HEAD(&xprt->bc_pa_list); in xprt_init()
2037 INIT_LIST_HEAD(&xprt->xprt_switch); in xprt_init()
2039 xprt->last_used = jiffies; in xprt_init()
2040 xprt->cwnd = RPC_INITCWND; in xprt_init()
2041 xprt->bind_index = 0; in xprt_init()
2043 rpc_init_wait_queue(&xprt->binding, "xprt_binding"); in xprt_init()
2044 rpc_init_wait_queue(&xprt->pending, "xprt_pending"); in xprt_init()
2045 rpc_init_wait_queue(&xprt->sending, "xprt_sending"); in xprt_init()
2046 rpc_init_priority_wait_queue(&xprt->backlog, "xprt_backlog"); in xprt_init()
2050 xprt->xprt_net = get_net_track(net, &xprt->ns_tracker, GFP_KERNEL); in xprt_init()
2054 * xprt_create_transport - create an RPC transport
2063 t = xprt_class_find_by_ident(args->ident); in xprt_create_transport()
2065 dprintk("RPC: transport (%d) not supported\n", args->ident); in xprt_create_transport()
2066 return ERR_PTR(-EIO); in xprt_create_transport()
2069 xprt = t->setup(args); in xprt_create_transport()
2074 if (args->flags & XPRT_CREATE_NO_IDLE_TIMEOUT) in xprt_create_transport()
2075 xprt->idle_timeout = 0; in xprt_create_transport()
2076 INIT_WORK(&xprt->task_cleanup, xprt_autoclose); in xprt_create_transport()
2078 timer_setup(&xprt->timer, xprt_init_autodisconnect, 0); in xprt_create_transport()
2080 timer_setup(&xprt->timer, NULL, 0); in xprt_create_transport()
2082 if (strlen(args->servername) > RPC_MAXNETNAMELEN) { in xprt_create_transport()
2084 return ERR_PTR(-EINVAL); in xprt_create_transport()
2086 xprt->servername = kstrdup(args->servername, GFP_KERNEL); in xprt_create_transport()
2087 if (xprt->servername == NULL) { in xprt_create_transport()
2089 return ERR_PTR(-ENOMEM); in xprt_create_transport()
2107 rpc_destroy_wait_queue(&xprt->binding); in xprt_destroy_cb()
2108 rpc_destroy_wait_queue(&xprt->pending); in xprt_destroy_cb()
2109 rpc_destroy_wait_queue(&xprt->sending); in xprt_destroy_cb()
2110 rpc_destroy_wait_queue(&xprt->backlog); in xprt_destroy_cb()
2111 kfree(xprt->servername); in xprt_destroy_cb()
2120 xprt->ops->destroy(xprt); in xprt_destroy_cb()
2124 * xprt_destroy - destroy an RPC transport, killing off all requests.
2133 wait_on_bit_lock(&xprt->state, XPRT_LOCKED, TASK_UNINTERRUPTIBLE); in xprt_destroy()
2137 * is cleared. We use ->transport_lock to ensure the mod_timer() in xprt_destroy()
2140 spin_lock(&xprt->transport_lock); in xprt_destroy()
2141 del_timer_sync(&xprt->timer); in xprt_destroy()
2142 spin_unlock(&xprt->transport_lock); in xprt_destroy()
2148 INIT_WORK(&xprt->task_cleanup, xprt_destroy_cb); in xprt_destroy()
2149 schedule_work(&xprt->task_cleanup); in xprt_destroy()
2158 * xprt_get - return a reference to an RPC transport.
2164 if (xprt != NULL && kref_get_unless_zero(&xprt->kref)) in xprt_get()
2171 * xprt_put - release a reference to an RPC transport.
2178 kref_put(&xprt->kref, xprt_destroy_kref); in xprt_put()
2182 void xprt_set_offline_locked(struct rpc_xprt *xprt, struct rpc_xprt_switch *xps) in xprt_set_offline_locked() argument
2184 if (!test_and_set_bit(XPRT_OFFLINE, &xprt->state)) { in xprt_set_offline_locked()
2185 spin_lock(&xps->xps_lock); in xprt_set_offline_locked()
2186 xps->xps_nactive--; in xprt_set_offline_locked()
2187 spin_unlock(&xps->xps_lock); in xprt_set_offline_locked()
2191 void xprt_set_online_locked(struct rpc_xprt *xprt, struct rpc_xprt_switch *xps) in xprt_set_online_locked() argument
2193 if (test_and_clear_bit(XPRT_OFFLINE, &xprt->state)) { in xprt_set_online_locked()
2194 spin_lock(&xps->xps_lock); in xprt_set_online_locked()
2195 xps->xps_nactive++; in xprt_set_online_locked()
2196 spin_unlock(&xps->xps_lock); in xprt_set_online_locked()
2200 void xprt_delete_locked(struct rpc_xprt *xprt, struct rpc_xprt_switch *xps) in xprt_delete_locked() argument
2202 if (test_and_set_bit(XPRT_REMOVE, &xprt->state)) in xprt_delete_locked()
2206 if (!test_bit(XPRT_CONNECTED, &xprt->state)) in xprt_delete_locked()
2209 if (!xprt->sending.qlen && !xprt->pending.qlen && in xprt_delete_locked()
2210 !xprt->backlog.qlen && !atomic_long_read(&xprt->queuelen)) in xprt_delete_locked()
2211 rpc_xprt_switch_remove_xprt(xps, xprt, true); in xprt_delete_locked()