Lines Matching +full:rpc +full:- +full:if
1 // SPDX-License-Identifier: GPL-2.0-only
5 * This is a generic RPC call interface supporting congestion avoidance,
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
16 * transport's wait list. At the same time, if a reply is expected,
19 * - When a packet arrives, the data_ready handler walks the list of
20 * pending requests for that transport. If a matching XID is found, the
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,
27 * it should release the RPC slot, and process the reply.
28 * If the call timed out, it may choose to retry the operation by
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>
63 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
80 unsigned long timeout = jiffies + req->rq_timeout; in xprt_request_timeout()
82 if (time_before(timeout, req->rq_majortimeo)) in xprt_request_timeout()
84 return req->rq_majortimeo; in xprt_request_timeout()
88 * xprt_register_transport - register a transport implementation
91 * If a transport implementation is loaded as a kernel module, it can
92 * call this interface to make itself known to the RPC client.
96 * -EEXIST: transport already registered
97 * -EINVAL: transport module being unloaded
104 result = -EEXIST; in xprt_register_transport()
108 if (t->ident == transport->ident) in xprt_register_transport()
112 list_add_tail(&transport->list, &xprt_list); in xprt_register_transport()
113 printk(KERN_INFO "RPC: Registered %s transport module.\n", in xprt_register_transport()
114 transport->name); in xprt_register_transport()
124 * xprt_unregister_transport - unregister a transport implementation
129 * -ENOENT: transport never registered
139 if (t == transport) { in xprt_unregister_transport()
141 "RPC: Unregistered %s transport module.\n", in xprt_unregister_transport()
142 transport->name); in xprt_unregister_transport()
143 list_del_init(&transport->list); in xprt_unregister_transport()
147 result = -ENOENT; in xprt_unregister_transport()
158 module_put(t->owner); in xprt_class_release()
168 for (i = 0; t->netid[i][0] != '\0'; i++) { in xprt_class_find_by_netid_locked()
169 if (strcmp(t->netid[i], netid) != 0) in xprt_class_find_by_netid_locked()
171 if (!try_module_get(t->owner)) in xprt_class_find_by_netid_locked()
186 if (!t) { in xprt_class_find_by_netid()
188 request_module("rpc%s", netid); in xprt_class_find_by_netid()
197 * xprt_load_transport - load a transport implementation
202 * -ENOENT: transport module not available
209 if (!t) in xprt_load_transport()
210 return -ENOENT; in xprt_load_transport()
218 xprt->snd_task = NULL; in xprt_clear_locked()
219 if (!test_bit(XPRT_CLOSE_WAIT, &xprt->state)) { in xprt_clear_locked()
221 clear_bit(XPRT_LOCKED, &xprt->state); in xprt_clear_locked()
224 queue_work(xprtiod_workqueue, &xprt->task_cleanup); in xprt_clear_locked()
228 * xprt_reserve_xprt - serialize write access to transports
238 struct rpc_rqst *req = task->tk_rqstp; in xprt_reserve_xprt()
240 if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) { in xprt_reserve_xprt()
241 if (task == xprt->snd_task) in xprt_reserve_xprt()
245 if (test_bit(XPRT_WRITE_SPACE, &xprt->state)) in xprt_reserve_xprt()
247 xprt->snd_task = task; in xprt_reserve_xprt()
256 task->tk_status = -EAGAIN; in xprt_reserve_xprt()
257 if (RPC_IS_SOFT(task)) in xprt_reserve_xprt()
258 rpc_sleep_on_timeout(&xprt->sending, task, NULL, in xprt_reserve_xprt()
261 rpc_sleep_on(&xprt->sending, task, NULL); in xprt_reserve_xprt()
269 return test_bit(XPRT_CWND_WAIT, &xprt->state); in xprt_need_congestion_window_wait()
275 if (!list_empty(&xprt->xmit_queue)) { in xprt_set_congestion_window_wait()
276 /* Peek at head of queue to see if it can make progress */ in xprt_set_congestion_window_wait()
277 if (list_first_entry(&xprt->xmit_queue, struct rpc_rqst, in xprt_set_congestion_window_wait()
278 rq_xmit)->rq_cong) in xprt_set_congestion_window_wait()
281 set_bit(XPRT_CWND_WAIT, &xprt->state); in xprt_set_congestion_window_wait()
287 if (!RPCXPRT_CONGESTED(xprt)) in xprt_test_and_clear_congestion_window_wait()
288 clear_bit(XPRT_CWND_WAIT, &xprt->state); in xprt_test_and_clear_congestion_window_wait()
292 * xprt_reserve_xprt_cong - serialize write access to transports
298 * Note that the lock is only granted if we know there are free slots.
302 struct rpc_rqst *req = task->tk_rqstp; in xprt_reserve_xprt_cong()
304 if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) { in xprt_reserve_xprt_cong()
305 if (task == xprt->snd_task) in xprt_reserve_xprt_cong()
309 if (req == NULL) { in xprt_reserve_xprt_cong()
310 xprt->snd_task = task; in xprt_reserve_xprt_cong()
313 if (test_bit(XPRT_WRITE_SPACE, &xprt->state)) in xprt_reserve_xprt_cong()
315 if (!xprt_need_congestion_window_wait(xprt)) { in xprt_reserve_xprt_cong()
316 xprt->snd_task = task; in xprt_reserve_xprt_cong()
322 task->tk_status = -EAGAIN; in xprt_reserve_xprt_cong()
323 if (RPC_IS_SOFT(task)) in xprt_reserve_xprt_cong()
324 rpc_sleep_on_timeout(&xprt->sending, task, NULL, in xprt_reserve_xprt_cong()
327 rpc_sleep_on(&xprt->sending, task, NULL); in xprt_reserve_xprt_cong()
339 if (test_bit(XPRT_LOCKED, &xprt->state) && xprt->snd_task == task) in xprt_lock_write()
341 spin_lock(&xprt->transport_lock); in xprt_lock_write()
342 retval = xprt->ops->reserve_xprt(xprt, task); in xprt_lock_write()
343 spin_unlock(&xprt->transport_lock); in xprt_lock_write()
351 xprt->snd_task = task; in __xprt_lock_write_func()
357 if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) in __xprt_lock_write_next()
359 if (test_bit(XPRT_WRITE_SPACE, &xprt->state)) in __xprt_lock_write_next()
361 if (rpc_wake_up_first_on_wq(xprtiod_workqueue, &xprt->sending, in __xprt_lock_write_next()
370 if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) in __xprt_lock_write_next_cong()
372 if (test_bit(XPRT_WRITE_SPACE, &xprt->state)) in __xprt_lock_write_next_cong()
374 if (xprt_need_congestion_window_wait(xprt)) in __xprt_lock_write_next_cong()
376 if (rpc_wake_up_first_on_wq(xprtiod_workqueue, &xprt->sending, in __xprt_lock_write_next_cong()
384 * xprt_release_xprt - allow other requests to use a transport
392 if (xprt->snd_task == task) { in xprt_release_xprt()
401 * xprt_release_xprt_cong - allow other requests to use a transport
406 * transport if the transport's congestion window allows it.
410 if (xprt->snd_task == task) { in xprt_release_xprt_cong()
420 if (xprt->snd_task != task) in xprt_release_write()
422 spin_lock(&xprt->transport_lock); in xprt_release_write()
423 xprt->ops->release_xprt(xprt, task); in xprt_release_write()
424 spin_unlock(&xprt->transport_lock); in xprt_release_write()
428 * Van Jacobson congestion avoidance. Check if the congestion window
429 * overflowed. Put the task to sleep if this is the case.
434 if (req->rq_cong) in __xprt_get_cong()
436 trace_xprt_get_cong(xprt, req->rq_task); in __xprt_get_cong()
437 if (RPCXPRT_CONGESTED(xprt)) { in __xprt_get_cong()
441 req->rq_cong = 1; in __xprt_get_cong()
442 xprt->cong += RPC_CWNDSCALE; in __xprt_get_cong()
453 if (!req->rq_cong) in __xprt_put_cong()
455 req->rq_cong = 0; in __xprt_put_cong()
456 xprt->cong -= RPC_CWNDSCALE; in __xprt_put_cong()
458 trace_xprt_put_cong(xprt, req->rq_task); in __xprt_put_cong()
463 * xprt_request_get_cong - Request congestion control credits
465 * @req: pointer to RPC request
474 if (req->rq_cong) in xprt_request_get_cong()
476 spin_lock(&xprt->transport_lock); in xprt_request_get_cong()
478 spin_unlock(&xprt->transport_lock); in xprt_request_get_cong()
484 * xprt_release_rqst_cong - housekeeping when request is complete
485 * @task: RPC request that recently completed
491 struct rpc_rqst *req = task->tk_rqstp; in xprt_release_rqst_cong()
493 __xprt_put_cong(req->rq_xprt, req); in xprt_release_rqst_cong()
499 if (test_and_clear_bit(XPRT_CWND_WAIT, &xprt->state)) in xprt_clear_congestion_window_wait_locked()
505 * entry on xprt->sending
510 if (test_and_clear_bit(XPRT_CWND_WAIT, &xprt->state)) { in xprt_clear_congestion_window_wait()
511 spin_lock(&xprt->transport_lock); in xprt_clear_congestion_window_wait()
513 spin_unlock(&xprt->transport_lock); in xprt_clear_congestion_window_wait()
518 * xprt_adjust_cwnd - adjust transport congestion window
520 * @task: recently completed RPC request used to adjust window
521 * @result: result code of completed RPC request
523 * The transport code maintains an estimate on the maximum number of out-
524 * standing RPC requests, using a smoothed version of the congestion
526 * congestion algorithm: If a retransmit occurs, the congestion window is
529 * - a reply is received and
530 * - a full number of requests are outstanding and
531 * - the congestion window hasn't been updated recently.
535 struct rpc_rqst *req = task->tk_rqstp; in xprt_adjust_cwnd()
536 unsigned long cwnd = xprt->cwnd; in xprt_adjust_cwnd()
538 if (result >= 0 && cwnd <= xprt->cong) { in xprt_adjust_cwnd()
542 if (cwnd > RPC_MAXCWND(xprt)) in xprt_adjust_cwnd()
545 } else if (result == -ETIMEDOUT) { in xprt_adjust_cwnd()
547 if (cwnd < RPC_CWNDSCALE) in xprt_adjust_cwnd()
550 dprintk("RPC: cong %ld, cwnd was %ld, now %ld\n", in xprt_adjust_cwnd()
551 xprt->cong, xprt->cwnd, cwnd); in xprt_adjust_cwnd()
552 xprt->cwnd = cwnd; in xprt_adjust_cwnd()
558 * xprt_wake_pending_tasks - wake all tasks on a transport's pending queue
565 if (status < 0) in xprt_wake_pending_tasks()
566 rpc_wake_up_status(&xprt->pending, status); in xprt_wake_pending_tasks()
568 rpc_wake_up(&xprt->pending); in xprt_wake_pending_tasks()
573 * xprt_wait_for_buffer_space - wait for transport output buffer to clear
578 * an incomplete RPC call transmission.
582 set_bit(XPRT_WRITE_SPACE, &xprt->state); in xprt_wait_for_buffer_space()
589 if (test_and_clear_bit(XPRT_WRITE_SPACE, &xprt->state)) { in xprt_clear_write_space_locked()
591 dprintk("RPC: write space: waking waiting task on " in xprt_clear_write_space_locked()
599 * xprt_write_space - wake the task waiting for transport output buffer space
608 if (!test_bit(XPRT_WRITE_SPACE, &xprt->state)) in xprt_write_space()
610 spin_lock(&xprt->transport_lock); in xprt_write_space()
612 spin_unlock(&xprt->transport_lock); in xprt_write_space()
619 s64 delta = ktime_to_ns(ktime_get() - abstime); in xprt_abs_ktime_to_jiffies()
621 jiffies - nsecs_to_jiffies(delta) : in xprt_abs_ktime_to_jiffies()
622 jiffies + nsecs_to_jiffies(-delta); in xprt_abs_ktime_to_jiffies()
627 const struct rpc_timeout *to = req->rq_task->tk_client->cl_timeout; in xprt_calc_majortimeo()
628 unsigned long majortimeo = req->rq_timeout; in xprt_calc_majortimeo()
630 if (to->to_exponential) in xprt_calc_majortimeo()
631 majortimeo <<= to->to_retries; in xprt_calc_majortimeo()
633 majortimeo += to->to_increment * to->to_retries; in xprt_calc_majortimeo()
634 if (majortimeo > to->to_maxval || majortimeo == 0) in xprt_calc_majortimeo()
635 majortimeo = to->to_maxval; in xprt_calc_majortimeo()
641 req->rq_majortimeo += xprt_calc_majortimeo(req); in xprt_reset_majortimeo()
646 req->rq_minortimeo += req->rq_timeout; in xprt_reset_minortimeo()
652 struct rpc_xprt *xprt = req->rq_xprt; in xprt_init_majortimeo()
654 if (likely(xprt && xprt_connected(xprt))) in xprt_init_majortimeo()
657 time_init = xprt_abs_ktime_to_jiffies(task->tk_start); in xprt_init_majortimeo()
658 req->rq_timeout = task->tk_client->cl_timeout->to_initval; in xprt_init_majortimeo()
659 req->rq_majortimeo = time_init + xprt_calc_majortimeo(req); in xprt_init_majortimeo()
660 req->rq_minortimeo = time_init + req->rq_timeout; in xprt_init_majortimeo()
664 * xprt_adjust_timeout - adjust timeout values for next retransmit
665 * @req: RPC request containing parameters to use for the adjustment
670 struct rpc_xprt *xprt = req->rq_xprt; in xprt_adjust_timeout()
671 const struct rpc_timeout *to = req->rq_task->tk_client->cl_timeout; in xprt_adjust_timeout()
674 if (time_before(jiffies, req->rq_majortimeo)) { in xprt_adjust_timeout()
675 if (time_before(jiffies, req->rq_minortimeo)) in xprt_adjust_timeout()
677 if (to->to_exponential) in xprt_adjust_timeout()
678 req->rq_timeout <<= 1; in xprt_adjust_timeout()
680 req->rq_timeout += to->to_increment; in xprt_adjust_timeout()
681 if (to->to_maxval && req->rq_timeout >= to->to_maxval) in xprt_adjust_timeout()
682 req->rq_timeout = to->to_maxval; in xprt_adjust_timeout()
683 req->rq_retries++; in xprt_adjust_timeout()
685 req->rq_timeout = to->to_initval; in xprt_adjust_timeout()
686 req->rq_retries = 0; in xprt_adjust_timeout()
689 spin_lock(&xprt->transport_lock); in xprt_adjust_timeout()
690 rpc_init_rtt(req->rq_task->tk_client->cl_rtt, to->to_initval); in xprt_adjust_timeout()
691 spin_unlock(&xprt->transport_lock); in xprt_adjust_timeout()
692 status = -ETIMEDOUT; in xprt_adjust_timeout()
696 if (req->rq_timeout == 0) { in xprt_adjust_timeout()
698 req->rq_timeout = 5 * HZ; in xprt_adjust_timeout()
710 clear_bit(XPRT_CLOSE_WAIT, &xprt->state); in xprt_autoclose()
711 xprt->ops->close(xprt); in xprt_autoclose()
713 wake_up_bit(&xprt->state, XPRT_LOCKED); in xprt_autoclose()
718 * xprt_disconnect_done - mark a transport as disconnected
725 spin_lock(&xprt->transport_lock); in xprt_disconnect_done()
729 xprt_wake_pending_tasks(xprt, -ENOTCONN); in xprt_disconnect_done()
730 spin_unlock(&xprt->transport_lock); in xprt_disconnect_done()
735 * xprt_schedule_autoclose_locked - Try to schedule an autoclose RPC call
740 if (test_and_set_bit(XPRT_CLOSE_WAIT, &xprt->state)) in xprt_schedule_autoclose_locked()
742 if (test_and_set_bit(XPRT_LOCKED, &xprt->state) == 0) in xprt_schedule_autoclose_locked()
743 queue_work(xprtiod_workqueue, &xprt->task_cleanup); in xprt_schedule_autoclose_locked()
744 else if (xprt->snd_task && !test_bit(XPRT_SND_IS_COOKIE, &xprt->state)) in xprt_schedule_autoclose_locked()
745 rpc_wake_up_queued_task_set_status(&xprt->pending, in xprt_schedule_autoclose_locked()
746 xprt->snd_task, -ENOTCONN); in xprt_schedule_autoclose_locked()
750 * xprt_force_disconnect - force a transport to disconnect
759 spin_lock(&xprt->transport_lock); in xprt_force_disconnect()
761 spin_unlock(&xprt->transport_lock); in xprt_force_disconnect()
768 return READ_ONCE(xprt->connect_cookie); in xprt_connect_cookie()
774 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_retransmit_after_disconnect()
775 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_retransmit_after_disconnect()
777 return req->rq_connect_cookie != xprt_connect_cookie(xprt) || in xprt_request_retransmit_after_disconnect()
782 * xprt_conditional_disconnect - force a transport to disconnect
786 * This attempts to break the connection if and only if 'cookie' matches
789 * a batch of RPC requests.
795 spin_lock(&xprt->transport_lock); in xprt_conditional_disconnect()
796 if (cookie != xprt->connect_cookie) in xprt_conditional_disconnect()
798 if (test_bit(XPRT_CLOSING, &xprt->state)) in xprt_conditional_disconnect()
802 spin_unlock(&xprt->transport_lock); in xprt_conditional_disconnect()
808 return xprt->idle_timeout != 0; in xprt_has_timer()
813 __must_hold(&xprt->transport_lock) in xprt_schedule_autodisconnect()
815 xprt->last_used = jiffies; in xprt_schedule_autodisconnect()
816 if (RB_EMPTY_ROOT(&xprt->recv_queue) && xprt_has_timer(xprt)) in xprt_schedule_autodisconnect()
817 mod_timer(&xprt->timer, xprt->last_used + xprt->idle_timeout); in xprt_schedule_autodisconnect()
825 if (!RB_EMPTY_ROOT(&xprt->recv_queue)) in xprt_init_autodisconnect()
827 /* Reset xprt->last_used to avoid connect/autodisconnect cycling */ in xprt_init_autodisconnect()
828 xprt->last_used = jiffies; in xprt_init_autodisconnect()
829 if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) in xprt_init_autodisconnect()
831 queue_work(xprtiod_workqueue, &xprt->task_cleanup); in xprt_init_autodisconnect()
840 spin_lock(&xprt->transport_lock); in xprt_lock_connect()
841 if (!test_bit(XPRT_LOCKED, &xprt->state)) in xprt_lock_connect()
843 if (xprt->snd_task != task) in xprt_lock_connect()
845 set_bit(XPRT_SND_IS_COOKIE, &xprt->state); in xprt_lock_connect()
846 xprt->snd_task = cookie; in xprt_lock_connect()
849 spin_unlock(&xprt->transport_lock); in xprt_lock_connect()
856 spin_lock(&xprt->transport_lock); in xprt_unlock_connect()
857 if (xprt->snd_task != cookie) in xprt_unlock_connect()
859 if (!test_bit(XPRT_LOCKED, &xprt->state)) in xprt_unlock_connect()
861 xprt->snd_task =NULL; in xprt_unlock_connect()
862 clear_bit(XPRT_SND_IS_COOKIE, &xprt->state); in xprt_unlock_connect()
863 xprt->ops->release_xprt(xprt, NULL); in xprt_unlock_connect()
866 spin_unlock(&xprt->transport_lock); in xprt_unlock_connect()
867 wake_up_bit(&xprt->state, XPRT_LOCKED); in xprt_unlock_connect()
872 * xprt_connect - schedule a transport connect operation
873 * @task: RPC task that is requesting the connect
878 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in xprt_connect()
882 if (!xprt_bound(xprt)) { in xprt_connect()
883 task->tk_status = -EAGAIN; in xprt_connect()
886 if (!xprt_lock_write(xprt, task)) in xprt_connect()
889 if (!xprt_connected(xprt) && !test_bit(XPRT_CLOSE_WAIT, &xprt->state)) { in xprt_connect()
890 task->tk_rqstp->rq_connect_cookie = xprt->connect_cookie; in xprt_connect()
891 rpc_sleep_on_timeout(&xprt->pending, task, NULL, in xprt_connect()
892 xprt_request_timeout(task->tk_rqstp)); in xprt_connect()
894 if (test_bit(XPRT_CLOSING, &xprt->state)) in xprt_connect()
896 if (xprt_test_and_set_connecting(xprt)) in xprt_connect()
899 if (!xprt_connected(xprt)) { in xprt_connect()
900 xprt->stat.connect_start = jiffies; in xprt_connect()
901 xprt->ops->connect(xprt, task); in xprt_connect()
904 task->tk_status = 0; in xprt_connect()
905 rpc_wake_up_queued_task(&xprt->pending, task); in xprt_connect()
912 * xprt_reconnect_delay - compute the wait before scheduling a connect
920 start = xprt->stat.connect_start + xprt->reestablish_timeout; in xprt_reconnect_delay()
921 if (time_after(start, now)) in xprt_reconnect_delay()
922 return start - now; in xprt_reconnect_delay()
928 * xprt_reconnect_backoff - compute the new re-establish timeout
935 xprt->reestablish_timeout <<= 1; in xprt_reconnect_backoff()
936 if (xprt->reestablish_timeout > xprt->max_reconnect_timeout) in xprt_reconnect_backoff()
937 xprt->reestablish_timeout = xprt->max_reconnect_timeout; in xprt_reconnect_backoff()
938 if (xprt->reestablish_timeout < init_to) in xprt_reconnect_backoff()
939 xprt->reestablish_timeout = init_to; in xprt_reconnect_backoff()
951 if (xid1 == xid2) in xprt_xid_cmp()
953 if ((__force u32)xid1 < (__force u32)xid2) in xprt_xid_cmp()
961 struct rb_node *n = xprt->recv_queue.rb_node; in xprt_request_rb_find()
966 switch (xprt_xid_cmp(xid, req->rq_xid)) { in xprt_request_rb_find()
968 n = n->rb_left; in xprt_request_rb_find()
971 n = n->rb_right; in xprt_request_rb_find()
983 struct rb_node **p = &xprt->recv_queue.rb_node; in xprt_request_rb_insert()
990 switch(xprt_xid_cmp(new->rq_xid, req->rq_xid)) { in xprt_request_rb_insert()
992 p = &n->rb_left; in xprt_request_rb_insert()
995 p = &n->rb_right; in xprt_request_rb_insert()
1002 rb_link_node(&new->rq_recv, n, p); in xprt_request_rb_insert()
1003 rb_insert_color(&new->rq_recv, &xprt->recv_queue); in xprt_request_rb_insert()
1009 rb_erase(&req->rq_recv, &xprt->recv_queue); in xprt_request_rb_remove()
1013 * xprt_lookup_rqst - find an RPC request corresponding to an XID
1015 * @xid: RPC XID of incoming reply
1017 * Caller holds xprt->queue_lock.
1024 if (entry != NULL) { in xprt_lookup_rqst()
1026 entry->rq_rtt = ktime_sub(ktime_get(), entry->rq_xtime); in xprt_lookup_rqst()
1030 dprintk("RPC: xprt_lookup_rqst did not find xid %08x\n", in xprt_lookup_rqst()
1032 trace_xprt_lookup_rqst(xprt, xid, -ENOENT); in xprt_lookup_rqst()
1033 xprt->stat.bad_xids++; in xprt_lookup_rqst()
1041 return atomic_read(&req->rq_pin) != 0; in xprt_is_pinned_rqst()
1045 * xprt_pin_rqst - Pin a request on the transport receive list
1049 * so should be holding xprt->queue_lock.
1053 atomic_inc(&req->rq_pin); in xprt_pin_rqst()
1058 * xprt_unpin_rqst - Unpin a request on the transport receive list
1061 * Caller should be holding xprt->queue_lock.
1065 if (!test_bit(RPC_TASK_MSG_PIN_WAIT, &req->rq_task->tk_runstate)) { in xprt_unpin_rqst()
1066 atomic_dec(&req->rq_pin); in xprt_unpin_rqst()
1069 if (atomic_dec_and_test(&req->rq_pin)) in xprt_unpin_rqst()
1070 wake_up_var(&req->rq_pin); in xprt_unpin_rqst()
1076 wait_var_event(&req->rq_pin, !xprt_is_pinned_rqst(req)); in xprt_wait_on_pinned_rqst()
1082 return !test_bit(RPC_TASK_NEED_RECV, &task->tk_runstate) && in xprt_request_data_received()
1083 READ_ONCE(task->tk_rqstp->rq_reply_bytes_recvd) != 0; in xprt_request_data_received()
1089 return !test_bit(RPC_TASK_NEED_RECV, &task->tk_runstate) && in xprt_request_need_enqueue_receive()
1090 READ_ONCE(task->tk_rqstp->rq_reply_bytes_recvd) == 0; in xprt_request_need_enqueue_receive()
1094 * xprt_request_enqueue_receive - Add an request to the receive queue
1095 * @task: RPC task
1101 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_enqueue_receive()
1102 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_enqueue_receive()
1104 if (!xprt_request_need_enqueue_receive(task, req)) in xprt_request_enqueue_receive()
1107 xprt_request_prepare(task->tk_rqstp); in xprt_request_enqueue_receive()
1108 spin_lock(&xprt->queue_lock); in xprt_request_enqueue_receive()
1111 memcpy(&req->rq_private_buf, &req->rq_rcv_buf, in xprt_request_enqueue_receive()
1112 sizeof(req->rq_private_buf)); in xprt_request_enqueue_receive()
1116 set_bit(RPC_TASK_NEED_RECV, &task->tk_runstate); in xprt_request_enqueue_receive()
1117 spin_unlock(&xprt->queue_lock); in xprt_request_enqueue_receive()
1120 del_singleshot_timer_sync(&xprt->timer); in xprt_request_enqueue_receive()
1124 * xprt_request_dequeue_receive_locked - Remove a request from the receive queue
1125 * @task: RPC task
1127 * Caller must hold xprt->queue_lock.
1132 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_dequeue_receive_locked()
1134 if (test_and_clear_bit(RPC_TASK_NEED_RECV, &task->tk_runstate)) in xprt_request_dequeue_receive_locked()
1135 xprt_request_rb_remove(req->rq_xprt, req); in xprt_request_dequeue_receive_locked()
1139 * xprt_update_rtt - Update RPC RTT statistics
1140 * @task: RPC request that recently completed
1142 * Caller holds xprt->queue_lock.
1146 struct rpc_rqst *req = task->tk_rqstp; in xprt_update_rtt()
1147 struct rpc_rtt *rtt = task->tk_client->cl_rtt; in xprt_update_rtt()
1148 unsigned int timer = task->tk_msg.rpc_proc->p_timer; in xprt_update_rtt()
1149 long m = usecs_to_jiffies(ktime_to_us(req->rq_rtt)); in xprt_update_rtt()
1151 if (timer) { in xprt_update_rtt()
1152 if (req->rq_ntrans == 1) in xprt_update_rtt()
1154 rpc_set_timeo(rtt, timer, req->rq_ntrans - 1); in xprt_update_rtt()
1160 * xprt_complete_rqst - called when reply processing is complete
1161 * @task: RPC request that recently completed
1164 * Caller holds xprt->queue_lock.
1168 struct rpc_rqst *req = task->tk_rqstp; in xprt_complete_rqst()
1169 struct rpc_xprt *xprt = req->rq_xprt; in xprt_complete_rqst()
1171 xprt->stat.recvs++; in xprt_complete_rqst()
1173 req->rq_private_buf.len = copied; in xprt_complete_rqst()
1175 /* req->rq_reply_bytes_recvd */ in xprt_complete_rqst()
1177 req->rq_reply_bytes_recvd = copied; in xprt_complete_rqst()
1179 rpc_wake_up_queued_task(&xprt->pending, task); in xprt_complete_rqst()
1185 struct rpc_rqst *req = task->tk_rqstp; in xprt_timer()
1186 struct rpc_xprt *xprt = req->rq_xprt; in xprt_timer()
1188 if (task->tk_status != -ETIMEDOUT) in xprt_timer()
1191 trace_xprt_timer(xprt, req->rq_xid, task->tk_status); in xprt_timer()
1192 if (!req->rq_reply_bytes_recvd) { in xprt_timer()
1193 if (xprt->ops->timer) in xprt_timer()
1194 xprt->ops->timer(xprt, task); in xprt_timer()
1196 task->tk_status = 0; in xprt_timer()
1200 * xprt_wait_for_reply_request_def - wait for reply
1205 * the retransmit timeout based on round-trip time estimation,
1210 struct rpc_rqst *req = task->tk_rqstp; in xprt_wait_for_reply_request_def()
1212 rpc_sleep_on_timeout(&req->rq_xprt->pending, task, xprt_timer, in xprt_wait_for_reply_request_def()
1218 * xprt_wait_for_reply_request_rtt - wait for reply using RTT estimator
1226 int timer = task->tk_msg.rpc_proc->p_timer; in xprt_wait_for_reply_request_rtt()
1227 struct rpc_clnt *clnt = task->tk_client; in xprt_wait_for_reply_request_rtt()
1228 struct rpc_rtt *rtt = clnt->cl_rtt; in xprt_wait_for_reply_request_rtt()
1229 struct rpc_rqst *req = task->tk_rqstp; in xprt_wait_for_reply_request_rtt()
1230 unsigned long max_timeout = clnt->cl_timeout->to_maxval; in xprt_wait_for_reply_request_rtt()
1234 timeout <<= rpc_ntimeo(rtt, timer) + req->rq_retries; in xprt_wait_for_reply_request_rtt()
1235 if (timeout > max_timeout || timeout == 0) in xprt_wait_for_reply_request_rtt()
1237 rpc_sleep_on_timeout(&req->rq_xprt->pending, task, xprt_timer, in xprt_wait_for_reply_request_rtt()
1243 * xprt_request_wait_receive - wait for the reply to an RPC request
1244 * @task: RPC task about to send a request
1249 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_wait_receive()
1250 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_wait_receive()
1252 if (!test_bit(RPC_TASK_NEED_RECV, &task->tk_runstate)) in xprt_request_wait_receive()
1255 * Sleep on the pending queue if we're expecting a reply. in xprt_request_wait_receive()
1257 * req->rq_reply_bytes_recvd, and the call to rpc_sleep_on(). in xprt_request_wait_receive()
1259 spin_lock(&xprt->queue_lock); in xprt_request_wait_receive()
1260 if (test_bit(RPC_TASK_NEED_RECV, &task->tk_runstate)) { in xprt_request_wait_receive()
1261 xprt->ops->wait_for_reply_request(task); in xprt_request_wait_receive()
1263 * Send an extra queue wakeup call if the in xprt_request_wait_receive()
1267 if (xprt_request_retransmit_after_disconnect(task)) in xprt_request_wait_receive()
1268 rpc_wake_up_queued_task_set_status(&xprt->pending, in xprt_request_wait_receive()
1269 task, -ENOTCONN); in xprt_request_wait_receive()
1271 spin_unlock(&xprt->queue_lock); in xprt_request_wait_receive()
1277 return !test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate); in xprt_request_need_enqueue_transmit()
1281 * xprt_request_enqueue_transmit - queue a task for transmission
1289 struct rpc_rqst *pos, *req = task->tk_rqstp; in xprt_request_enqueue_transmit()
1290 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_enqueue_transmit()
1292 if (xprt_request_need_enqueue_transmit(task, req)) { in xprt_request_enqueue_transmit()
1293 req->rq_bytes_sent = 0; in xprt_request_enqueue_transmit()
1294 spin_lock(&xprt->queue_lock); in xprt_request_enqueue_transmit()
1299 if (req->rq_cong) { in xprt_request_enqueue_transmit()
1301 list_for_each_entry(pos, &xprt->xmit_queue, rq_xmit) { in xprt_request_enqueue_transmit()
1302 if (pos->rq_cong) in xprt_request_enqueue_transmit()
1305 list_add_tail(&req->rq_xmit, &pos->rq_xmit); in xprt_request_enqueue_transmit()
1306 INIT_LIST_HEAD(&req->rq_xmit2); in xprt_request_enqueue_transmit()
1309 } else if (!req->rq_seqno) { in xprt_request_enqueue_transmit()
1310 list_for_each_entry(pos, &xprt->xmit_queue, rq_xmit) { in xprt_request_enqueue_transmit()
1311 if (pos->rq_task->tk_owner != task->tk_owner) in xprt_request_enqueue_transmit()
1313 list_add_tail(&req->rq_xmit2, &pos->rq_xmit2); in xprt_request_enqueue_transmit()
1314 INIT_LIST_HEAD(&req->rq_xmit); in xprt_request_enqueue_transmit()
1318 list_add_tail(&req->rq_xmit, &xprt->xmit_queue); in xprt_request_enqueue_transmit()
1319 INIT_LIST_HEAD(&req->rq_xmit2); in xprt_request_enqueue_transmit()
1321 set_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate); in xprt_request_enqueue_transmit()
1322 spin_unlock(&xprt->queue_lock); in xprt_request_enqueue_transmit()
1327 * xprt_request_dequeue_transmit_locked - remove a task from the transmission queue
1331 * Caller must hold xprt->queue_lock
1336 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_dequeue_transmit_locked()
1338 if (!test_and_clear_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) in xprt_request_dequeue_transmit_locked()
1340 if (!list_empty(&req->rq_xmit)) { in xprt_request_dequeue_transmit_locked()
1341 list_del(&req->rq_xmit); in xprt_request_dequeue_transmit_locked()
1342 if (!list_empty(&req->rq_xmit2)) { in xprt_request_dequeue_transmit_locked()
1343 struct rpc_rqst *next = list_first_entry(&req->rq_xmit2, in xprt_request_dequeue_transmit_locked()
1345 list_del(&req->rq_xmit2); in xprt_request_dequeue_transmit_locked()
1346 list_add_tail(&next->rq_xmit, &next->rq_xprt->xmit_queue); in xprt_request_dequeue_transmit_locked()
1349 list_del(&req->rq_xmit2); in xprt_request_dequeue_transmit_locked()
1353 * xprt_request_dequeue_transmit - remove a task from the transmission queue
1361 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_dequeue_transmit()
1362 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_dequeue_transmit()
1364 spin_lock(&xprt->queue_lock); in xprt_request_dequeue_transmit()
1366 spin_unlock(&xprt->queue_lock); in xprt_request_dequeue_transmit()
1370 * xprt_request_dequeue_xprt - remove a task from the transmit+receive queue
1379 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_dequeue_xprt()
1380 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_dequeue_xprt()
1382 if (test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate) || in xprt_request_dequeue_xprt()
1383 test_bit(RPC_TASK_NEED_RECV, &task->tk_runstate) || in xprt_request_dequeue_xprt()
1385 spin_lock(&xprt->queue_lock); in xprt_request_dequeue_xprt()
1389 set_bit(RPC_TASK_MSG_PIN_WAIT, &task->tk_runstate); in xprt_request_dequeue_xprt()
1390 spin_unlock(&xprt->queue_lock); in xprt_request_dequeue_xprt()
1392 spin_lock(&xprt->queue_lock); in xprt_request_dequeue_xprt()
1393 clear_bit(RPC_TASK_MSG_PIN_WAIT, &task->tk_runstate); in xprt_request_dequeue_xprt()
1395 spin_unlock(&xprt->queue_lock); in xprt_request_dequeue_xprt()
1400 * xprt_request_prepare - prepare an encoded request for transport
1409 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_prepare()
1411 if (xprt->ops->prepare_request) in xprt_request_prepare()
1412 xprt->ops->prepare_request(req); in xprt_request_prepare()
1416 * xprt_request_need_retransmit - Test if a task needs retransmission
1428 * xprt_prepare_transmit - reserve the transport before sending a request
1429 * @task: RPC task about to send a request
1434 struct rpc_rqst *req = task->tk_rqstp; in xprt_prepare_transmit()
1435 struct rpc_xprt *xprt = req->rq_xprt; in xprt_prepare_transmit()
1437 if (!xprt_lock_write(xprt, task)) { in xprt_prepare_transmit()
1439 if (!test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) in xprt_prepare_transmit()
1440 rpc_wake_up_queued_task_set_status(&xprt->sending, in xprt_prepare_transmit()
1450 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in xprt_end_transmit()
1457 * xprt_request_transmit - send an RPC request on a transport
1459 * @snd_task: RPC task that owns the transport lock
1462 * Note that if the request is not the same as snd_task, then it
1469 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_transmit()
1470 struct rpc_task *task = req->rq_task; in xprt_request_transmit()
1475 if (!req->rq_bytes_sent) { in xprt_request_transmit()
1476 if (xprt_request_data_received(task)) { in xprt_request_transmit()
1481 if (rpcauth_xmit_need_reencode(task)) { in xprt_request_transmit()
1482 status = -EBADMSG; in xprt_request_transmit()
1485 if (RPC_SIGNALLED(task)) { in xprt_request_transmit()
1486 status = -ERESTARTSYS; in xprt_request_transmit()
1492 * Update req->rq_ntrans before transmitting to avoid races with in xprt_request_transmit()
1496 req->rq_ntrans++; in xprt_request_transmit()
1498 trace_rpc_xdr_sendto(task, &req->rq_snd_buf); in xprt_request_transmit()
1499 connect_cookie = xprt->connect_cookie; in xprt_request_transmit()
1500 status = xprt->ops->send_request(req); in xprt_request_transmit()
1501 if (status != 0) { in xprt_request_transmit()
1502 req->rq_ntrans--; in xprt_request_transmit()
1507 if (is_retrans) in xprt_request_transmit()
1508 task->tk_client->cl_stats->rpcretrans++; in xprt_request_transmit()
1512 task->tk_flags |= RPC_TASK_SENT; in xprt_request_transmit()
1513 spin_lock(&xprt->transport_lock); in xprt_request_transmit()
1515 xprt->stat.sends++; in xprt_request_transmit()
1516 xprt->stat.req_u += xprt->stat.sends - xprt->stat.recvs; in xprt_request_transmit()
1517 xprt->stat.bklog_u += xprt->backlog.qlen; in xprt_request_transmit()
1518 xprt->stat.sending_u += xprt->sending.qlen; in xprt_request_transmit()
1519 xprt->stat.pending_u += xprt->pending.qlen; in xprt_request_transmit()
1520 spin_unlock(&xprt->transport_lock); in xprt_request_transmit()
1522 req->rq_connect_cookie = connect_cookie; in xprt_request_transmit()
1526 rpc_wake_up_queued_task_set_status(&xprt->sending, task, status); in xprt_request_transmit()
1531 * xprt_transmit - send an RPC request on a transport
1532 * @task: controlling RPC task
1542 struct rpc_rqst *next, *req = task->tk_rqstp; in xprt_transmit()
1543 struct rpc_xprt *xprt = req->rq_xprt; in xprt_transmit()
1546 spin_lock(&xprt->queue_lock); in xprt_transmit()
1548 next = list_first_entry_or_null(&xprt->xmit_queue, in xprt_transmit()
1550 if (!next) in xprt_transmit()
1553 spin_unlock(&xprt->queue_lock); in xprt_transmit()
1555 if (status == -EBADMSG && next != req) in xprt_transmit()
1557 spin_lock(&xprt->queue_lock); in xprt_transmit()
1559 if (status < 0) { in xprt_transmit()
1560 if (test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) in xprt_transmit()
1561 task->tk_status = status; in xprt_transmit()
1565 if (xprt_request_data_received(task) && in xprt_transmit()
1566 !test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) in xprt_transmit()
1568 cond_resched_lock(&xprt->queue_lock); in xprt_transmit()
1570 spin_unlock(&xprt->queue_lock); in xprt_transmit()
1575 if (task->tk_rqstp) in xprt_complete_request_init()
1581 set_bit(XPRT_CONGESTED, &xprt->state); in xprt_add_backlog()
1582 rpc_sleep_on(&xprt->backlog, task, xprt_complete_request_init); in xprt_add_backlog()
1590 if (task->tk_rqstp == NULL) { in __xprt_set_rq()
1592 task->tk_rqstp = req; in __xprt_set_rq()
1600 if (rpc_wake_up_first(&xprt->backlog, __xprt_set_rq, req) == NULL) { in xprt_wake_up_backlog()
1601 clear_bit(XPRT_CONGESTED, &xprt->state); in xprt_wake_up_backlog()
1612 if (!test_bit(XPRT_CONGESTED, &xprt->state)) in xprt_throttle_congested()
1614 spin_lock(&xprt->reserve_lock); in xprt_throttle_congested()
1615 if (test_bit(XPRT_CONGESTED, &xprt->state)) { in xprt_throttle_congested()
1619 spin_unlock(&xprt->reserve_lock); in xprt_throttle_congested()
1626 struct rpc_rqst *req = ERR_PTR(-EAGAIN); in xprt_dynamic_alloc_slot()
1629 if (xprt->num_reqs >= xprt->max_reqs) in xprt_dynamic_alloc_slot()
1631 ++xprt->num_reqs; in xprt_dynamic_alloc_slot()
1632 spin_unlock(&xprt->reserve_lock); in xprt_dynamic_alloc_slot()
1633 if (current->flags & PF_WQ_WORKER) in xprt_dynamic_alloc_slot()
1636 spin_lock(&xprt->reserve_lock); in xprt_dynamic_alloc_slot()
1637 if (req != NULL) in xprt_dynamic_alloc_slot()
1639 --xprt->num_reqs; in xprt_dynamic_alloc_slot()
1640 req = ERR_PTR(-ENOMEM); in xprt_dynamic_alloc_slot()
1647 if (xprt->num_reqs > xprt->min_reqs) { in xprt_dynamic_free_slot()
1648 --xprt->num_reqs; in xprt_dynamic_free_slot()
1659 spin_lock(&xprt->reserve_lock); in xprt_alloc_slot()
1660 if (!list_empty(&xprt->free)) { in xprt_alloc_slot()
1661 req = list_entry(xprt->free.next, struct rpc_rqst, rq_list); in xprt_alloc_slot()
1662 list_del(&req->rq_list); in xprt_alloc_slot()
1666 if (!IS_ERR(req)) in xprt_alloc_slot()
1669 case -ENOMEM: in xprt_alloc_slot()
1670 dprintk("RPC: dynamic allocation of request slot " in xprt_alloc_slot()
1672 task->tk_status = -ENOMEM; in xprt_alloc_slot()
1674 case -EAGAIN: in xprt_alloc_slot()
1676 dprintk("RPC: waiting for request slot\n"); in xprt_alloc_slot()
1679 task->tk_status = -EAGAIN; in xprt_alloc_slot()
1681 spin_unlock(&xprt->reserve_lock); in xprt_alloc_slot()
1684 xprt->stat.max_slots = max_t(unsigned int, xprt->stat.max_slots, in xprt_alloc_slot()
1685 xprt->num_reqs); in xprt_alloc_slot()
1686 spin_unlock(&xprt->reserve_lock); in xprt_alloc_slot()
1688 task->tk_status = 0; in xprt_alloc_slot()
1689 task->tk_rqstp = req; in xprt_alloc_slot()
1695 spin_lock(&xprt->reserve_lock); in xprt_free_slot()
1696 if (!xprt_wake_up_backlog(xprt, req) && in xprt_free_slot()
1699 list_add(&req->rq_list, &xprt->free); in xprt_free_slot()
1701 spin_unlock(&xprt->reserve_lock); in xprt_free_slot()
1708 while (!list_empty(&xprt->free)) { in xprt_free_all_slots()
1709 req = list_first_entry(&xprt->free, struct rpc_rqst, rq_list); in xprt_free_all_slots()
1710 list_del(&req->rq_list); in xprt_free_all_slots()
1724 if (xprt == NULL) in xprt_alloc()
1731 if (!req) in xprt_alloc()
1733 list_add(&req->rq_list, &xprt->free); in xprt_alloc()
1735 if (max_alloc > num_prealloc) in xprt_alloc()
1736 xprt->max_reqs = max_alloc; in xprt_alloc()
1738 xprt->max_reqs = num_prealloc; in xprt_alloc()
1739 xprt->min_reqs = num_prealloc; in xprt_alloc()
1740 xprt->num_reqs = num_prealloc; in xprt_alloc()
1753 put_net(xprt->xprt_net); in xprt_free()
1762 req->rq_connect_cookie = xprt_connect_cookie(xprt) - 1; in xprt_init_connect_cookie()
1770 spin_lock(&xprt->reserve_lock); in xprt_alloc_xid()
1771 xid = (__force __be32)xprt->xid++; in xprt_alloc_xid()
1772 spin_unlock(&xprt->reserve_lock); in xprt_alloc_xid()
1779 xprt->xid = prandom_u32(); in xprt_init_xid()
1785 struct rpc_xprt *xprt = task->tk_xprt; in xprt_request_init()
1786 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_init()
1788 req->rq_task = task; in xprt_request_init()
1789 req->rq_xprt = xprt; in xprt_request_init()
1790 req->rq_buffer = NULL; in xprt_request_init()
1791 req->rq_xid = xprt_alloc_xid(xprt); in xprt_request_init()
1793 req->rq_snd_buf.len = 0; in xprt_request_init()
1794 req->rq_snd_buf.buflen = 0; in xprt_request_init()
1795 req->rq_rcv_buf.len = 0; in xprt_request_init()
1796 req->rq_rcv_buf.buflen = 0; in xprt_request_init()
1797 req->rq_snd_buf.bvec = NULL; in xprt_request_init()
1798 req->rq_rcv_buf.bvec = NULL; in xprt_request_init()
1799 req->rq_release_snd_buf = NULL; in xprt_request_init()
1808 xprt->ops->alloc_slot(xprt, task); in xprt_do_reserve()
1809 if (task->tk_rqstp != NULL) in xprt_do_reserve()
1814 * xprt_reserve - allocate an RPC request slot
1815 * @task: RPC task requesting a slot allocation
1817 * If the transport is marked as being congested, or if no more
1823 struct rpc_xprt *xprt = task->tk_xprt; in xprt_reserve()
1825 task->tk_status = 0; in xprt_reserve()
1826 if (task->tk_rqstp != NULL) in xprt_reserve()
1829 task->tk_status = -EAGAIN; in xprt_reserve()
1830 if (!xprt_throttle_congested(xprt, task)) in xprt_reserve()
1835 * xprt_retry_reserve - allocate an RPC request slot
1836 * @task: RPC task requesting a slot allocation
1838 * If no more slots are available, place the task on the transport's
1845 struct rpc_xprt *xprt = task->tk_xprt; in xprt_retry_reserve()
1847 task->tk_status = 0; in xprt_retry_reserve()
1848 if (task->tk_rqstp != NULL) in xprt_retry_reserve()
1851 task->tk_status = -EAGAIN; in xprt_retry_reserve()
1856 * xprt_release - release an RPC request slot
1863 struct rpc_rqst *req = task->tk_rqstp; in xprt_release()
1865 if (req == NULL) { in xprt_release()
1866 if (task->tk_client) { in xprt_release()
1867 xprt = task->tk_xprt; in xprt_release()
1873 xprt = req->rq_xprt; in xprt_release()
1875 spin_lock(&xprt->transport_lock); in xprt_release()
1876 xprt->ops->release_xprt(xprt, task); in xprt_release()
1877 if (xprt->ops->release_request) in xprt_release()
1878 xprt->ops->release_request(task); in xprt_release()
1880 spin_unlock(&xprt->transport_lock); in xprt_release()
1881 if (req->rq_buffer) in xprt_release()
1882 xprt->ops->buf_free(task); in xprt_release()
1883 xdr_free_bvec(&req->rq_rcv_buf); in xprt_release()
1884 xdr_free_bvec(&req->rq_snd_buf); in xprt_release()
1885 if (req->rq_cred != NULL) in xprt_release()
1886 put_rpccred(req->rq_cred); in xprt_release()
1887 if (req->rq_release_snd_buf) in xprt_release()
1888 req->rq_release_snd_buf(req); in xprt_release()
1890 task->tk_rqstp = NULL; in xprt_release()
1891 if (likely(!bc_prealloc(req))) in xprt_release()
1892 xprt->ops->free_slot(xprt, req); in xprt_release()
1901 struct xdr_buf *xbufp = &req->rq_snd_buf; in xprt_init_bc_request()
1903 task->tk_rqstp = req; in xprt_init_bc_request()
1904 req->rq_task = task; in xprt_init_bc_request()
1905 xprt_init_connect_cookie(req, req->rq_xprt); in xprt_init_bc_request()
1910 xbufp->len = xbufp->head[0].iov_len + xbufp->page_len + in xprt_init_bc_request()
1911 xbufp->tail[0].iov_len; in xprt_init_bc_request()
1917 kref_init(&xprt->kref); in xprt_init()
1919 spin_lock_init(&xprt->transport_lock); in xprt_init()
1920 spin_lock_init(&xprt->reserve_lock); in xprt_init()
1921 spin_lock_init(&xprt->queue_lock); in xprt_init()
1923 INIT_LIST_HEAD(&xprt->free); in xprt_init()
1924 xprt->recv_queue = RB_ROOT; in xprt_init()
1925 INIT_LIST_HEAD(&xprt->xmit_queue); in xprt_init()
1926 #if defined(CONFIG_SUNRPC_BACKCHANNEL) in xprt_init()
1927 spin_lock_init(&xprt->bc_pa_lock); in xprt_init()
1928 INIT_LIST_HEAD(&xprt->bc_pa_list); in xprt_init()
1930 INIT_LIST_HEAD(&xprt->xprt_switch); in xprt_init()
1932 xprt->last_used = jiffies; in xprt_init()
1933 xprt->cwnd = RPC_INITCWND; in xprt_init()
1934 xprt->bind_index = 0; in xprt_init()
1936 rpc_init_wait_queue(&xprt->binding, "xprt_binding"); in xprt_init()
1937 rpc_init_wait_queue(&xprt->pending, "xprt_pending"); in xprt_init()
1938 rpc_init_wait_queue(&xprt->sending, "xprt_sending"); in xprt_init()
1939 rpc_init_priority_wait_queue(&xprt->backlog, "xprt_backlog"); in xprt_init()
1943 xprt->xprt_net = get_net(net); in xprt_init()
1947 * xprt_create_transport - create an RPC transport
1948 * @args: rpc transport creation arguments
1958 if (t->ident == args->ident) { in xprt_create_transport()
1964 dprintk("RPC: transport (%d) not supported\n", args->ident); in xprt_create_transport()
1965 return ERR_PTR(-EIO); in xprt_create_transport()
1968 xprt = t->setup(args); in xprt_create_transport()
1969 if (IS_ERR(xprt)) in xprt_create_transport()
1971 if (args->flags & XPRT_CREATE_NO_IDLE_TIMEOUT) in xprt_create_transport()
1972 xprt->idle_timeout = 0; in xprt_create_transport()
1973 INIT_WORK(&xprt->task_cleanup, xprt_autoclose); in xprt_create_transport()
1974 if (xprt_has_timer(xprt)) in xprt_create_transport()
1975 timer_setup(&xprt->timer, xprt_init_autodisconnect, 0); in xprt_create_transport()
1977 timer_setup(&xprt->timer, NULL, 0); in xprt_create_transport()
1979 if (strlen(args->servername) > RPC_MAXNETNAMELEN) { in xprt_create_transport()
1981 return ERR_PTR(-EINVAL); in xprt_create_transport()
1983 xprt->servername = kstrdup(args->servername, GFP_KERNEL); in xprt_create_transport()
1984 if (xprt->servername == NULL) { in xprt_create_transport()
1986 return ERR_PTR(-ENOMEM); in xprt_create_transport()
2004 rpc_destroy_wait_queue(&xprt->binding); in xprt_destroy_cb()
2005 rpc_destroy_wait_queue(&xprt->pending); in xprt_destroy_cb()
2006 rpc_destroy_wait_queue(&xprt->sending); in xprt_destroy_cb()
2007 rpc_destroy_wait_queue(&xprt->backlog); in xprt_destroy_cb()
2008 kfree(xprt->servername); in xprt_destroy_cb()
2017 xprt->ops->destroy(xprt); in xprt_destroy_cb()
2021 * xprt_destroy - destroy an RPC transport, killing off all requests.
2030 wait_on_bit_lock(&xprt->state, XPRT_LOCKED, TASK_UNINTERRUPTIBLE); in xprt_destroy()
2034 * is cleared. We use ->transport_lock to ensure the mod_timer() in xprt_destroy()
2037 spin_lock(&xprt->transport_lock); in xprt_destroy()
2038 del_timer_sync(&xprt->timer); in xprt_destroy()
2039 spin_unlock(&xprt->transport_lock); in xprt_destroy()
2045 INIT_WORK(&xprt->task_cleanup, xprt_destroy_cb); in xprt_destroy()
2046 schedule_work(&xprt->task_cleanup); in xprt_destroy()
2055 * xprt_get - return a reference to an RPC transport.
2061 if (xprt != NULL && kref_get_unless_zero(&xprt->kref)) in xprt_get()
2068 * xprt_put - release a reference to an RPC transport.
2074 if (xprt != NULL) in xprt_put()
2075 kref_put(&xprt->kref, xprt_destroy_kref); in xprt_put()