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)
79 unsigned long timeout = jiffies + req->rq_timeout; in xprt_request_timeout()
81 if (time_before(timeout, req->rq_majortimeo)) in xprt_request_timeout()
83 return req->rq_majortimeo; in xprt_request_timeout()
87 * xprt_register_transport - register a transport implementation
90 * If a transport implementation is loaded as a kernel module, it can
91 * call this interface to make itself known to the RPC client.
95 * -EEXIST: transport already registered
96 * -EINVAL: transport module being unloaded
103 result = -EEXIST; in xprt_register_transport()
107 if (t->ident == transport->ident) in xprt_register_transport()
111 list_add_tail(&transport->list, &xprt_list); in xprt_register_transport()
112 printk(KERN_INFO "RPC: Registered %s transport module.\n", in xprt_register_transport()
113 transport->name); in xprt_register_transport()
123 * xprt_unregister_transport - unregister a transport implementation
128 * -ENOENT: transport never registered
138 if (t == transport) { in xprt_unregister_transport()
140 "RPC: Unregistered %s transport module.\n", in xprt_unregister_transport()
141 transport->name); in xprt_unregister_transport()
142 list_del_init(&transport->list); in xprt_unregister_transport()
146 result = -ENOENT; in xprt_unregister_transport()
155 * xprt_load_transport - load a transport implementation
160 * -ENOENT: transport module not available
170 if (strcmp(t->name, transport_name) == 0) { in xprt_load_transport()
184 xprt->snd_task = NULL; in xprt_clear_locked()
185 if (!test_bit(XPRT_CLOSE_WAIT, &xprt->state)) { in xprt_clear_locked()
187 clear_bit(XPRT_LOCKED, &xprt->state); in xprt_clear_locked()
190 queue_work(xprtiod_workqueue, &xprt->task_cleanup); in xprt_clear_locked()
194 * xprt_reserve_xprt - serialize write access to transports
204 struct rpc_rqst *req = task->tk_rqstp; in xprt_reserve_xprt()
206 if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) { in xprt_reserve_xprt()
207 if (task == xprt->snd_task) in xprt_reserve_xprt()
211 if (test_bit(XPRT_WRITE_SPACE, &xprt->state)) in xprt_reserve_xprt()
213 xprt->snd_task = task; in xprt_reserve_xprt()
222 task->tk_status = -EAGAIN; in xprt_reserve_xprt()
223 if (RPC_IS_SOFT(task)) in xprt_reserve_xprt()
224 rpc_sleep_on_timeout(&xprt->sending, task, NULL, in xprt_reserve_xprt()
227 rpc_sleep_on(&xprt->sending, task, NULL); in xprt_reserve_xprt()
235 return test_bit(XPRT_CWND_WAIT, &xprt->state); in xprt_need_congestion_window_wait()
241 if (!list_empty(&xprt->xmit_queue)) { in xprt_set_congestion_window_wait()
242 /* Peek at head of queue to see if it can make progress */ in xprt_set_congestion_window_wait()
243 if (list_first_entry(&xprt->xmit_queue, struct rpc_rqst, in xprt_set_congestion_window_wait()
244 rq_xmit)->rq_cong) in xprt_set_congestion_window_wait()
247 set_bit(XPRT_CWND_WAIT, &xprt->state); in xprt_set_congestion_window_wait()
253 if (!RPCXPRT_CONGESTED(xprt)) in xprt_test_and_clear_congestion_window_wait()
254 clear_bit(XPRT_CWND_WAIT, &xprt->state); in xprt_test_and_clear_congestion_window_wait()
258 * xprt_reserve_xprt_cong - serialize write access to transports
264 * Note that the lock is only granted if we know there are free slots.
268 struct rpc_rqst *req = task->tk_rqstp; in xprt_reserve_xprt_cong()
270 if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) { in xprt_reserve_xprt_cong()
271 if (task == xprt->snd_task) in xprt_reserve_xprt_cong()
275 if (req == NULL) { in xprt_reserve_xprt_cong()
276 xprt->snd_task = task; in xprt_reserve_xprt_cong()
279 if (test_bit(XPRT_WRITE_SPACE, &xprt->state)) in xprt_reserve_xprt_cong()
281 if (!xprt_need_congestion_window_wait(xprt)) { in xprt_reserve_xprt_cong()
282 xprt->snd_task = task; in xprt_reserve_xprt_cong()
288 task->tk_status = -EAGAIN; in xprt_reserve_xprt_cong()
289 if (RPC_IS_SOFT(task)) in xprt_reserve_xprt_cong()
290 rpc_sleep_on_timeout(&xprt->sending, task, NULL, in xprt_reserve_xprt_cong()
293 rpc_sleep_on(&xprt->sending, task, NULL); in xprt_reserve_xprt_cong()
305 if (test_bit(XPRT_LOCKED, &xprt->state) && xprt->snd_task == task) in xprt_lock_write()
307 spin_lock(&xprt->transport_lock); in xprt_lock_write()
308 retval = xprt->ops->reserve_xprt(xprt, task); in xprt_lock_write()
309 spin_unlock(&xprt->transport_lock); in xprt_lock_write()
317 xprt->snd_task = task; in __xprt_lock_write_func()
323 if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) in __xprt_lock_write_next()
325 if (test_bit(XPRT_WRITE_SPACE, &xprt->state)) in __xprt_lock_write_next()
327 if (rpc_wake_up_first_on_wq(xprtiod_workqueue, &xprt->sending, in __xprt_lock_write_next()
336 if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) in __xprt_lock_write_next_cong()
338 if (test_bit(XPRT_WRITE_SPACE, &xprt->state)) in __xprt_lock_write_next_cong()
340 if (xprt_need_congestion_window_wait(xprt)) in __xprt_lock_write_next_cong()
342 if (rpc_wake_up_first_on_wq(xprtiod_workqueue, &xprt->sending, in __xprt_lock_write_next_cong()
350 * xprt_release_xprt - allow other requests to use a transport
358 if (xprt->snd_task == task) { in xprt_release_xprt()
367 * xprt_release_xprt_cong - allow other requests to use a transport
372 * transport if the transport's congestion window allows it.
376 if (xprt->snd_task == task) { in xprt_release_xprt_cong()
386 if (xprt->snd_task != task) in xprt_release_write()
388 spin_lock(&xprt->transport_lock); in xprt_release_write()
389 xprt->ops->release_xprt(xprt, task); in xprt_release_write()
390 spin_unlock(&xprt->transport_lock); in xprt_release_write()
394 * Van Jacobson congestion avoidance. Check if the congestion window
395 * overflowed. Put the task to sleep if this is the case.
400 if (req->rq_cong) in __xprt_get_cong()
402 trace_xprt_get_cong(xprt, req->rq_task); in __xprt_get_cong()
403 if (RPCXPRT_CONGESTED(xprt)) { in __xprt_get_cong()
407 req->rq_cong = 1; in __xprt_get_cong()
408 xprt->cong += RPC_CWNDSCALE; in __xprt_get_cong()
419 if (!req->rq_cong) in __xprt_put_cong()
421 req->rq_cong = 0; in __xprt_put_cong()
422 xprt->cong -= RPC_CWNDSCALE; in __xprt_put_cong()
424 trace_xprt_put_cong(xprt, req->rq_task); in __xprt_put_cong()
429 * xprt_request_get_cong - Request congestion control credits
431 * @req: pointer to RPC request
440 if (req->rq_cong) in xprt_request_get_cong()
442 spin_lock(&xprt->transport_lock); in xprt_request_get_cong()
444 spin_unlock(&xprt->transport_lock); in xprt_request_get_cong()
450 * xprt_release_rqst_cong - housekeeping when request is complete
451 * @task: RPC request that recently completed
457 struct rpc_rqst *req = task->tk_rqstp; in xprt_release_rqst_cong()
459 __xprt_put_cong(req->rq_xprt, req); in xprt_release_rqst_cong()
465 if (test_and_clear_bit(XPRT_CWND_WAIT, &xprt->state)) in xprt_clear_congestion_window_wait_locked()
471 * entry on xprt->sending
476 if (test_and_clear_bit(XPRT_CWND_WAIT, &xprt->state)) { in xprt_clear_congestion_window_wait()
477 spin_lock(&xprt->transport_lock); in xprt_clear_congestion_window_wait()
479 spin_unlock(&xprt->transport_lock); in xprt_clear_congestion_window_wait()
484 * xprt_adjust_cwnd - adjust transport congestion window
486 * @task: recently completed RPC request used to adjust window
487 * @result: result code of completed RPC request
489 * The transport code maintains an estimate on the maximum number of out-
490 * standing RPC requests, using a smoothed version of the congestion
492 * congestion algorithm: If a retransmit occurs, the congestion window is
495 * - a reply is received and
496 * - a full number of requests are outstanding and
497 * - the congestion window hasn't been updated recently.
501 struct rpc_rqst *req = task->tk_rqstp; in xprt_adjust_cwnd()
502 unsigned long cwnd = xprt->cwnd; in xprt_adjust_cwnd()
504 if (result >= 0 && cwnd <= xprt->cong) { in xprt_adjust_cwnd()
508 if (cwnd > RPC_MAXCWND(xprt)) in xprt_adjust_cwnd()
511 } else if (result == -ETIMEDOUT) { in xprt_adjust_cwnd()
513 if (cwnd < RPC_CWNDSCALE) in xprt_adjust_cwnd()
516 dprintk("RPC: cong %ld, cwnd was %ld, now %ld\n", in xprt_adjust_cwnd()
517 xprt->cong, xprt->cwnd, cwnd); in xprt_adjust_cwnd()
518 xprt->cwnd = cwnd; in xprt_adjust_cwnd()
524 * xprt_wake_pending_tasks - wake all tasks on a transport's pending queue
531 if (status < 0) in xprt_wake_pending_tasks()
532 rpc_wake_up_status(&xprt->pending, status); in xprt_wake_pending_tasks()
534 rpc_wake_up(&xprt->pending); in xprt_wake_pending_tasks()
539 * xprt_wait_for_buffer_space - wait for transport output buffer to clear
544 * an incomplete RPC call transmission.
548 set_bit(XPRT_WRITE_SPACE, &xprt->state); in xprt_wait_for_buffer_space()
555 if (test_and_clear_bit(XPRT_WRITE_SPACE, &xprt->state)) { in xprt_clear_write_space_locked()
557 dprintk("RPC: write space: waking waiting task on " in xprt_clear_write_space_locked()
565 * xprt_write_space - wake the task waiting for transport output buffer space
574 if (!test_bit(XPRT_WRITE_SPACE, &xprt->state)) in xprt_write_space()
576 spin_lock(&xprt->transport_lock); in xprt_write_space()
578 spin_unlock(&xprt->transport_lock); in xprt_write_space()
585 s64 delta = ktime_to_ns(ktime_get() - abstime); in xprt_abs_ktime_to_jiffies()
587 jiffies - nsecs_to_jiffies(delta) : in xprt_abs_ktime_to_jiffies()
588 jiffies + nsecs_to_jiffies(-delta); in xprt_abs_ktime_to_jiffies()
593 const struct rpc_timeout *to = req->rq_task->tk_client->cl_timeout; in xprt_calc_majortimeo()
594 unsigned long majortimeo = req->rq_timeout; in xprt_calc_majortimeo()
596 if (to->to_exponential) in xprt_calc_majortimeo()
597 majortimeo <<= to->to_retries; in xprt_calc_majortimeo()
599 majortimeo += to->to_increment * to->to_retries; in xprt_calc_majortimeo()
600 if (majortimeo > to->to_maxval || majortimeo == 0) in xprt_calc_majortimeo()
601 majortimeo = to->to_maxval; in xprt_calc_majortimeo()
607 req->rq_majortimeo += xprt_calc_majortimeo(req); in xprt_reset_majortimeo()
612 req->rq_minortimeo += req->rq_timeout; in xprt_reset_minortimeo()
618 struct rpc_xprt *xprt = req->rq_xprt; in xprt_init_majortimeo()
620 if (likely(xprt && xprt_connected(xprt))) in xprt_init_majortimeo()
623 time_init = xprt_abs_ktime_to_jiffies(task->tk_start); in xprt_init_majortimeo()
624 req->rq_timeout = task->tk_client->cl_timeout->to_initval; in xprt_init_majortimeo()
625 req->rq_majortimeo = time_init + xprt_calc_majortimeo(req); in xprt_init_majortimeo()
626 req->rq_minortimeo = time_init + req->rq_timeout; in xprt_init_majortimeo()
630 * xprt_adjust_timeout - adjust timeout values for next retransmit
631 * @req: RPC request containing parameters to use for the adjustment
636 struct rpc_xprt *xprt = req->rq_xprt; in xprt_adjust_timeout()
637 const struct rpc_timeout *to = req->rq_task->tk_client->cl_timeout; in xprt_adjust_timeout()
640 if (time_before(jiffies, req->rq_minortimeo)) in xprt_adjust_timeout()
642 if (time_before(jiffies, req->rq_majortimeo)) { in xprt_adjust_timeout()
643 if (to->to_exponential) in xprt_adjust_timeout()
644 req->rq_timeout <<= 1; in xprt_adjust_timeout()
646 req->rq_timeout += to->to_increment; in xprt_adjust_timeout()
647 if (to->to_maxval && req->rq_timeout >= to->to_maxval) in xprt_adjust_timeout()
648 req->rq_timeout = to->to_maxval; in xprt_adjust_timeout()
649 req->rq_retries++; in xprt_adjust_timeout()
651 req->rq_timeout = to->to_initval; in xprt_adjust_timeout()
652 req->rq_retries = 0; in xprt_adjust_timeout()
655 spin_lock(&xprt->transport_lock); in xprt_adjust_timeout()
656 rpc_init_rtt(req->rq_task->tk_client->cl_rtt, to->to_initval); in xprt_adjust_timeout()
657 spin_unlock(&xprt->transport_lock); in xprt_adjust_timeout()
658 status = -ETIMEDOUT; in xprt_adjust_timeout()
662 if (req->rq_timeout == 0) { in xprt_adjust_timeout()
664 req->rq_timeout = 5 * HZ; in xprt_adjust_timeout()
676 clear_bit(XPRT_CLOSE_WAIT, &xprt->state); in xprt_autoclose()
677 xprt->ops->close(xprt); in xprt_autoclose()
679 wake_up_bit(&xprt->state, XPRT_LOCKED); in xprt_autoclose()
684 * xprt_disconnect_done - mark a transport as disconnected
691 spin_lock(&xprt->transport_lock); in xprt_disconnect_done()
695 xprt_wake_pending_tasks(xprt, -ENOTCONN); in xprt_disconnect_done()
696 spin_unlock(&xprt->transport_lock); in xprt_disconnect_done()
701 * xprt_force_disconnect - force a transport to disconnect
710 spin_lock(&xprt->transport_lock); in xprt_force_disconnect()
711 set_bit(XPRT_CLOSE_WAIT, &xprt->state); in xprt_force_disconnect()
712 /* Try to schedule an autoclose RPC call */ in xprt_force_disconnect()
713 if (test_and_set_bit(XPRT_LOCKED, &xprt->state) == 0) in xprt_force_disconnect()
714 queue_work(xprtiod_workqueue, &xprt->task_cleanup); in xprt_force_disconnect()
715 else if (xprt->snd_task) in xprt_force_disconnect()
716 rpc_wake_up_queued_task_set_status(&xprt->pending, in xprt_force_disconnect()
717 xprt->snd_task, -ENOTCONN); in xprt_force_disconnect()
718 spin_unlock(&xprt->transport_lock); in xprt_force_disconnect()
725 return READ_ONCE(xprt->connect_cookie); in xprt_connect_cookie()
731 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_retransmit_after_disconnect()
732 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_retransmit_after_disconnect()
734 return req->rq_connect_cookie != xprt_connect_cookie(xprt) || in xprt_request_retransmit_after_disconnect()
739 * xprt_conditional_disconnect - force a transport to disconnect
743 * This attempts to break the connection if and only if 'cookie' matches
746 * a batch of RPC requests.
752 spin_lock(&xprt->transport_lock); in xprt_conditional_disconnect()
753 if (cookie != xprt->connect_cookie) in xprt_conditional_disconnect()
755 if (test_bit(XPRT_CLOSING, &xprt->state)) in xprt_conditional_disconnect()
757 set_bit(XPRT_CLOSE_WAIT, &xprt->state); in xprt_conditional_disconnect()
758 /* Try to schedule an autoclose RPC call */ in xprt_conditional_disconnect()
759 if (test_and_set_bit(XPRT_LOCKED, &xprt->state) == 0) in xprt_conditional_disconnect()
760 queue_work(xprtiod_workqueue, &xprt->task_cleanup); in xprt_conditional_disconnect()
761 xprt_wake_pending_tasks(xprt, -EAGAIN); in xprt_conditional_disconnect()
763 spin_unlock(&xprt->transport_lock); in xprt_conditional_disconnect()
769 return xprt->idle_timeout != 0; in xprt_has_timer()
774 __must_hold(&xprt->transport_lock) in xprt_schedule_autodisconnect()
776 xprt->last_used = jiffies; in xprt_schedule_autodisconnect()
777 if (RB_EMPTY_ROOT(&xprt->recv_queue) && xprt_has_timer(xprt)) in xprt_schedule_autodisconnect()
778 mod_timer(&xprt->timer, xprt->last_used + xprt->idle_timeout); in xprt_schedule_autodisconnect()
786 if (!RB_EMPTY_ROOT(&xprt->recv_queue)) in xprt_init_autodisconnect()
788 /* Reset xprt->last_used to avoid connect/autodisconnect cycling */ in xprt_init_autodisconnect()
789 xprt->last_used = jiffies; in xprt_init_autodisconnect()
790 if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) in xprt_init_autodisconnect()
792 queue_work(xprtiod_workqueue, &xprt->task_cleanup); in xprt_init_autodisconnect()
801 spin_lock(&xprt->transport_lock); in xprt_lock_connect()
802 if (!test_bit(XPRT_LOCKED, &xprt->state)) in xprt_lock_connect()
804 if (xprt->snd_task != task) in xprt_lock_connect()
806 xprt->snd_task = cookie; in xprt_lock_connect()
809 spin_unlock(&xprt->transport_lock); in xprt_lock_connect()
815 spin_lock(&xprt->transport_lock); in xprt_unlock_connect()
816 if (xprt->snd_task != cookie) in xprt_unlock_connect()
818 if (!test_bit(XPRT_LOCKED, &xprt->state)) in xprt_unlock_connect()
820 xprt->snd_task =NULL; in xprt_unlock_connect()
821 xprt->ops->release_xprt(xprt, NULL); in xprt_unlock_connect()
824 spin_unlock(&xprt->transport_lock); in xprt_unlock_connect()
825 wake_up_bit(&xprt->state, XPRT_LOCKED); in xprt_unlock_connect()
829 * xprt_connect - schedule a transport connect operation
830 * @task: RPC task that is requesting the connect
835 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; in xprt_connect()
839 if (!xprt_bound(xprt)) { in xprt_connect()
840 task->tk_status = -EAGAIN; in xprt_connect()
843 if (!xprt_lock_write(xprt, task)) in xprt_connect()
846 if (test_and_clear_bit(XPRT_CLOSE_WAIT, &xprt->state)) { in xprt_connect()
848 xprt->ops->close(xprt); in xprt_connect()
851 if (!xprt_connected(xprt)) { in xprt_connect()
852 task->tk_rqstp->rq_connect_cookie = xprt->connect_cookie; in xprt_connect()
853 rpc_sleep_on_timeout(&xprt->pending, task, NULL, in xprt_connect()
854 xprt_request_timeout(task->tk_rqstp)); in xprt_connect()
856 if (test_bit(XPRT_CLOSING, &xprt->state)) in xprt_connect()
858 if (xprt_test_and_set_connecting(xprt)) in xprt_connect()
861 if (!xprt_connected(xprt)) { in xprt_connect()
862 xprt->stat.connect_start = jiffies; in xprt_connect()
863 xprt->ops->connect(xprt, task); in xprt_connect()
866 task->tk_status = 0; in xprt_connect()
867 rpc_wake_up_queued_task(&xprt->pending, task); in xprt_connect()
874 * xprt_reconnect_delay - compute the wait before scheduling a connect
882 start = xprt->stat.connect_start + xprt->reestablish_timeout; in xprt_reconnect_delay()
883 if (time_after(start, now)) in xprt_reconnect_delay()
884 return start - now; in xprt_reconnect_delay()
890 * xprt_reconnect_backoff - compute the new re-establish timeout
897 xprt->reestablish_timeout <<= 1; in xprt_reconnect_backoff()
898 if (xprt->reestablish_timeout > xprt->max_reconnect_timeout) in xprt_reconnect_backoff()
899 xprt->reestablish_timeout = xprt->max_reconnect_timeout; in xprt_reconnect_backoff()
900 if (xprt->reestablish_timeout < init_to) in xprt_reconnect_backoff()
901 xprt->reestablish_timeout = init_to; in xprt_reconnect_backoff()
913 if (xid1 == xid2) in xprt_xid_cmp()
915 if ((__force u32)xid1 < (__force u32)xid2) in xprt_xid_cmp()
923 struct rb_node *n = xprt->recv_queue.rb_node; in xprt_request_rb_find()
928 switch (xprt_xid_cmp(xid, req->rq_xid)) { in xprt_request_rb_find()
930 n = n->rb_left; in xprt_request_rb_find()
933 n = n->rb_right; in xprt_request_rb_find()
945 struct rb_node **p = &xprt->recv_queue.rb_node; in xprt_request_rb_insert()
952 switch(xprt_xid_cmp(new->rq_xid, req->rq_xid)) { in xprt_request_rb_insert()
954 p = &n->rb_left; in xprt_request_rb_insert()
957 p = &n->rb_right; in xprt_request_rb_insert()
964 rb_link_node(&new->rq_recv, n, p); in xprt_request_rb_insert()
965 rb_insert_color(&new->rq_recv, &xprt->recv_queue); in xprt_request_rb_insert()
971 rb_erase(&req->rq_recv, &xprt->recv_queue); in xprt_request_rb_remove()
975 * xprt_lookup_rqst - find an RPC request corresponding to an XID
977 * @xid: RPC XID of incoming reply
979 * Caller holds xprt->queue_lock.
986 if (entry != NULL) { in xprt_lookup_rqst()
988 entry->rq_rtt = ktime_sub(ktime_get(), entry->rq_xtime); in xprt_lookup_rqst()
992 dprintk("RPC: xprt_lookup_rqst did not find xid %08x\n", in xprt_lookup_rqst()
994 trace_xprt_lookup_rqst(xprt, xid, -ENOENT); in xprt_lookup_rqst()
995 xprt->stat.bad_xids++; in xprt_lookup_rqst()
1003 return atomic_read(&req->rq_pin) != 0; in xprt_is_pinned_rqst()
1007 * xprt_pin_rqst - Pin a request on the transport receive list
1011 * so should be holding xprt->queue_lock.
1015 atomic_inc(&req->rq_pin); in xprt_pin_rqst()
1020 * xprt_unpin_rqst - Unpin a request on the transport receive list
1023 * Caller should be holding xprt->queue_lock.
1027 if (!test_bit(RPC_TASK_MSG_PIN_WAIT, &req->rq_task->tk_runstate)) { in xprt_unpin_rqst()
1028 atomic_dec(&req->rq_pin); in xprt_unpin_rqst()
1031 if (atomic_dec_and_test(&req->rq_pin)) in xprt_unpin_rqst()
1032 wake_up_var(&req->rq_pin); in xprt_unpin_rqst()
1038 wait_var_event(&req->rq_pin, !xprt_is_pinned_rqst(req)); in xprt_wait_on_pinned_rqst()
1044 return !test_bit(RPC_TASK_NEED_RECV, &task->tk_runstate) && in xprt_request_data_received()
1045 READ_ONCE(task->tk_rqstp->rq_reply_bytes_recvd) != 0; in xprt_request_data_received()
1051 return !test_bit(RPC_TASK_NEED_RECV, &task->tk_runstate) && in xprt_request_need_enqueue_receive()
1052 READ_ONCE(task->tk_rqstp->rq_reply_bytes_recvd) == 0; in xprt_request_need_enqueue_receive()
1056 * xprt_request_enqueue_receive - Add an request to the receive queue
1057 * @task: RPC task
1063 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_enqueue_receive()
1064 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_enqueue_receive()
1066 if (!xprt_request_need_enqueue_receive(task, req)) in xprt_request_enqueue_receive()
1069 xprt_request_prepare(task->tk_rqstp); in xprt_request_enqueue_receive()
1070 spin_lock(&xprt->queue_lock); in xprt_request_enqueue_receive()
1073 memcpy(&req->rq_private_buf, &req->rq_rcv_buf, in xprt_request_enqueue_receive()
1074 sizeof(req->rq_private_buf)); in xprt_request_enqueue_receive()
1078 set_bit(RPC_TASK_NEED_RECV, &task->tk_runstate); in xprt_request_enqueue_receive()
1079 spin_unlock(&xprt->queue_lock); in xprt_request_enqueue_receive()
1082 del_singleshot_timer_sync(&xprt->timer); in xprt_request_enqueue_receive()
1086 * xprt_request_dequeue_receive_locked - Remove a request from the receive queue
1087 * @task: RPC task
1089 * Caller must hold xprt->queue_lock.
1094 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_dequeue_receive_locked()
1096 if (test_and_clear_bit(RPC_TASK_NEED_RECV, &task->tk_runstate)) in xprt_request_dequeue_receive_locked()
1097 xprt_request_rb_remove(req->rq_xprt, req); in xprt_request_dequeue_receive_locked()
1101 * xprt_update_rtt - Update RPC RTT statistics
1102 * @task: RPC request that recently completed
1104 * Caller holds xprt->queue_lock.
1108 struct rpc_rqst *req = task->tk_rqstp; in xprt_update_rtt()
1109 struct rpc_rtt *rtt = task->tk_client->cl_rtt; in xprt_update_rtt()
1110 unsigned int timer = task->tk_msg.rpc_proc->p_timer; in xprt_update_rtt()
1111 long m = usecs_to_jiffies(ktime_to_us(req->rq_rtt)); in xprt_update_rtt()
1113 if (timer) { in xprt_update_rtt()
1114 if (req->rq_ntrans == 1) in xprt_update_rtt()
1116 rpc_set_timeo(rtt, timer, req->rq_ntrans - 1); in xprt_update_rtt()
1122 * xprt_complete_rqst - called when reply processing is complete
1123 * @task: RPC request that recently completed
1126 * Caller holds xprt->queue_lock.
1130 struct rpc_rqst *req = task->tk_rqstp; in xprt_complete_rqst()
1131 struct rpc_xprt *xprt = req->rq_xprt; in xprt_complete_rqst()
1133 xprt->stat.recvs++; in xprt_complete_rqst()
1135 req->rq_private_buf.len = copied; in xprt_complete_rqst()
1137 /* req->rq_reply_bytes_recvd */ in xprt_complete_rqst()
1139 req->rq_reply_bytes_recvd = copied; in xprt_complete_rqst()
1141 rpc_wake_up_queued_task(&xprt->pending, task); in xprt_complete_rqst()
1147 struct rpc_rqst *req = task->tk_rqstp; in xprt_timer()
1148 struct rpc_xprt *xprt = req->rq_xprt; in xprt_timer()
1150 if (task->tk_status != -ETIMEDOUT) in xprt_timer()
1153 trace_xprt_timer(xprt, req->rq_xid, task->tk_status); in xprt_timer()
1154 if (!req->rq_reply_bytes_recvd) { in xprt_timer()
1155 if (xprt->ops->timer) in xprt_timer()
1156 xprt->ops->timer(xprt, task); in xprt_timer()
1158 task->tk_status = 0; in xprt_timer()
1162 * xprt_wait_for_reply_request_def - wait for reply
1167 * the retransmit timeout based on round-trip time estimation,
1172 struct rpc_rqst *req = task->tk_rqstp; in xprt_wait_for_reply_request_def()
1174 rpc_sleep_on_timeout(&req->rq_xprt->pending, task, xprt_timer, in xprt_wait_for_reply_request_def()
1180 * xprt_wait_for_reply_request_rtt - wait for reply using RTT estimator
1188 int timer = task->tk_msg.rpc_proc->p_timer; in xprt_wait_for_reply_request_rtt()
1189 struct rpc_clnt *clnt = task->tk_client; in xprt_wait_for_reply_request_rtt()
1190 struct rpc_rtt *rtt = clnt->cl_rtt; in xprt_wait_for_reply_request_rtt()
1191 struct rpc_rqst *req = task->tk_rqstp; in xprt_wait_for_reply_request_rtt()
1192 unsigned long max_timeout = clnt->cl_timeout->to_maxval; in xprt_wait_for_reply_request_rtt()
1196 timeout <<= rpc_ntimeo(rtt, timer) + req->rq_retries; in xprt_wait_for_reply_request_rtt()
1197 if (timeout > max_timeout || timeout == 0) in xprt_wait_for_reply_request_rtt()
1199 rpc_sleep_on_timeout(&req->rq_xprt->pending, task, xprt_timer, in xprt_wait_for_reply_request_rtt()
1205 * xprt_request_wait_receive - wait for the reply to an RPC request
1206 * @task: RPC task about to send a request
1211 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_wait_receive()
1212 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_wait_receive()
1214 if (!test_bit(RPC_TASK_NEED_RECV, &task->tk_runstate)) in xprt_request_wait_receive()
1217 * Sleep on the pending queue if we're expecting a reply. in xprt_request_wait_receive()
1219 * req->rq_reply_bytes_recvd, and the call to rpc_sleep_on(). in xprt_request_wait_receive()
1221 spin_lock(&xprt->queue_lock); in xprt_request_wait_receive()
1222 if (test_bit(RPC_TASK_NEED_RECV, &task->tk_runstate)) { in xprt_request_wait_receive()
1223 xprt->ops->wait_for_reply_request(task); in xprt_request_wait_receive()
1225 * Send an extra queue wakeup call if the in xprt_request_wait_receive()
1229 if (xprt_request_retransmit_after_disconnect(task)) in xprt_request_wait_receive()
1230 rpc_wake_up_queued_task_set_status(&xprt->pending, in xprt_request_wait_receive()
1231 task, -ENOTCONN); in xprt_request_wait_receive()
1233 spin_unlock(&xprt->queue_lock); in xprt_request_wait_receive()
1239 return !test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate); in xprt_request_need_enqueue_transmit()
1243 * xprt_request_enqueue_transmit - queue a task for transmission
1251 struct rpc_rqst *pos, *req = task->tk_rqstp; in xprt_request_enqueue_transmit()
1252 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_enqueue_transmit()
1254 if (xprt_request_need_enqueue_transmit(task, req)) { in xprt_request_enqueue_transmit()
1255 req->rq_bytes_sent = 0; in xprt_request_enqueue_transmit()
1256 spin_lock(&xprt->queue_lock); in xprt_request_enqueue_transmit()
1261 if (req->rq_cong) { in xprt_request_enqueue_transmit()
1263 list_for_each_entry(pos, &xprt->xmit_queue, rq_xmit) { in xprt_request_enqueue_transmit()
1264 if (pos->rq_cong) in xprt_request_enqueue_transmit()
1267 list_add_tail(&req->rq_xmit, &pos->rq_xmit); in xprt_request_enqueue_transmit()
1268 INIT_LIST_HEAD(&req->rq_xmit2); in xprt_request_enqueue_transmit()
1271 } else if (RPC_IS_SWAPPER(task)) { in xprt_request_enqueue_transmit()
1272 list_for_each_entry(pos, &xprt->xmit_queue, rq_xmit) { in xprt_request_enqueue_transmit()
1273 if (pos->rq_cong || pos->rq_bytes_sent) in xprt_request_enqueue_transmit()
1275 if (RPC_IS_SWAPPER(pos->rq_task)) in xprt_request_enqueue_transmit()
1278 list_add_tail(&req->rq_xmit, &pos->rq_xmit); in xprt_request_enqueue_transmit()
1279 INIT_LIST_HEAD(&req->rq_xmit2); in xprt_request_enqueue_transmit()
1282 } else if (!req->rq_seqno) { in xprt_request_enqueue_transmit()
1283 list_for_each_entry(pos, &xprt->xmit_queue, rq_xmit) { in xprt_request_enqueue_transmit()
1284 if (pos->rq_task->tk_owner != task->tk_owner) in xprt_request_enqueue_transmit()
1286 list_add_tail(&req->rq_xmit2, &pos->rq_xmit2); in xprt_request_enqueue_transmit()
1287 INIT_LIST_HEAD(&req->rq_xmit); in xprt_request_enqueue_transmit()
1291 list_add_tail(&req->rq_xmit, &xprt->xmit_queue); in xprt_request_enqueue_transmit()
1292 INIT_LIST_HEAD(&req->rq_xmit2); in xprt_request_enqueue_transmit()
1294 set_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate); in xprt_request_enqueue_transmit()
1295 spin_unlock(&xprt->queue_lock); in xprt_request_enqueue_transmit()
1300 * xprt_request_dequeue_transmit_locked - remove a task from the transmission queue
1304 * Caller must hold xprt->queue_lock
1309 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_dequeue_transmit_locked()
1311 if (!test_and_clear_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) in xprt_request_dequeue_transmit_locked()
1313 if (!list_empty(&req->rq_xmit)) { in xprt_request_dequeue_transmit_locked()
1314 list_del(&req->rq_xmit); in xprt_request_dequeue_transmit_locked()
1315 if (!list_empty(&req->rq_xmit2)) { in xprt_request_dequeue_transmit_locked()
1316 struct rpc_rqst *next = list_first_entry(&req->rq_xmit2, in xprt_request_dequeue_transmit_locked()
1318 list_del(&req->rq_xmit2); in xprt_request_dequeue_transmit_locked()
1319 list_add_tail(&next->rq_xmit, &next->rq_xprt->xmit_queue); in xprt_request_dequeue_transmit_locked()
1322 list_del(&req->rq_xmit2); in xprt_request_dequeue_transmit_locked()
1326 * xprt_request_dequeue_transmit - remove a task from the transmission queue
1334 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_dequeue_transmit()
1335 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_dequeue_transmit()
1337 spin_lock(&xprt->queue_lock); in xprt_request_dequeue_transmit()
1339 spin_unlock(&xprt->queue_lock); in xprt_request_dequeue_transmit()
1343 * xprt_request_dequeue_xprt - remove a task from the transmit+receive queue
1352 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_dequeue_xprt()
1353 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_dequeue_xprt()
1355 if (test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate) || in xprt_request_dequeue_xprt()
1356 test_bit(RPC_TASK_NEED_RECV, &task->tk_runstate) || in xprt_request_dequeue_xprt()
1358 spin_lock(&xprt->queue_lock); in xprt_request_dequeue_xprt()
1362 set_bit(RPC_TASK_MSG_PIN_WAIT, &task->tk_runstate); in xprt_request_dequeue_xprt()
1363 spin_unlock(&xprt->queue_lock); in xprt_request_dequeue_xprt()
1365 spin_lock(&xprt->queue_lock); in xprt_request_dequeue_xprt()
1366 clear_bit(RPC_TASK_MSG_PIN_WAIT, &task->tk_runstate); in xprt_request_dequeue_xprt()
1368 spin_unlock(&xprt->queue_lock); in xprt_request_dequeue_xprt()
1373 * xprt_request_prepare - prepare an encoded request for transport
1382 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_prepare()
1384 if (xprt->ops->prepare_request) in xprt_request_prepare()
1385 xprt->ops->prepare_request(req); in xprt_request_prepare()
1389 * xprt_request_need_retransmit - Test if a task needs retransmission
1401 * xprt_prepare_transmit - reserve the transport before sending a request
1402 * @task: RPC task about to send a request
1407 struct rpc_rqst *req = task->tk_rqstp; in xprt_prepare_transmit()
1408 struct rpc_xprt *xprt = req->rq_xprt; in xprt_prepare_transmit()
1410 if (!xprt_lock_write(xprt, task)) { in xprt_prepare_transmit()
1414 if (!test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) in xprt_prepare_transmit()
1415 rpc_wake_up_queued_task_set_status(&xprt->sending, in xprt_prepare_transmit()
1425 xprt_release_write(task->tk_rqstp->rq_xprt, task); in xprt_end_transmit()
1429 * xprt_request_transmit - send an RPC request on a transport
1431 * @snd_task: RPC task that owns the transport lock
1434 * Note that if the request is not the same as snd_task, then it
1441 struct rpc_xprt *xprt = req->rq_xprt; in xprt_request_transmit()
1442 struct rpc_task *task = req->rq_task; in xprt_request_transmit()
1447 if (!req->rq_bytes_sent) { in xprt_request_transmit()
1448 if (xprt_request_data_received(task)) { in xprt_request_transmit()
1453 if (rpcauth_xmit_need_reencode(task)) { in xprt_request_transmit()
1454 status = -EBADMSG; in xprt_request_transmit()
1457 if (RPC_SIGNALLED(task)) { in xprt_request_transmit()
1458 status = -ERESTARTSYS; in xprt_request_transmit()
1464 * Update req->rq_ntrans before transmitting to avoid races with in xprt_request_transmit()
1468 req->rq_ntrans++; in xprt_request_transmit()
1470 trace_rpc_xdr_sendto(task, &req->rq_snd_buf); in xprt_request_transmit()
1471 connect_cookie = xprt->connect_cookie; in xprt_request_transmit()
1472 status = xprt->ops->send_request(req); in xprt_request_transmit()
1473 if (status != 0) { in xprt_request_transmit()
1474 req->rq_ntrans--; in xprt_request_transmit()
1479 if (is_retrans) in xprt_request_transmit()
1480 task->tk_client->cl_stats->rpcretrans++; in xprt_request_transmit()
1484 task->tk_flags |= RPC_TASK_SENT; in xprt_request_transmit()
1485 spin_lock(&xprt->transport_lock); in xprt_request_transmit()
1487 xprt->stat.sends++; in xprt_request_transmit()
1488 xprt->stat.req_u += xprt->stat.sends - xprt->stat.recvs; in xprt_request_transmit()
1489 xprt->stat.bklog_u += xprt->backlog.qlen; in xprt_request_transmit()
1490 xprt->stat.sending_u += xprt->sending.qlen; in xprt_request_transmit()
1491 xprt->stat.pending_u += xprt->pending.qlen; in xprt_request_transmit()
1492 spin_unlock(&xprt->transport_lock); in xprt_request_transmit()
1494 req->rq_connect_cookie = connect_cookie; in xprt_request_transmit()
1498 rpc_wake_up_queued_task_set_status(&xprt->sending, task, status); in xprt_request_transmit()
1503 * xprt_transmit - send an RPC request on a transport
1504 * @task: controlling RPC task
1514 struct rpc_rqst *next, *req = task->tk_rqstp; in xprt_transmit()
1515 struct rpc_xprt *xprt = req->rq_xprt; in xprt_transmit()
1518 spin_lock(&xprt->queue_lock); in xprt_transmit()
1520 while (!list_empty(&xprt->xmit_queue)) { in xprt_transmit()
1521 if (++counter == 20) in xprt_transmit()
1523 next = list_first_entry(&xprt->xmit_queue, in xprt_transmit()
1526 spin_unlock(&xprt->queue_lock); in xprt_transmit()
1528 if (status == -EBADMSG && next != req) in xprt_transmit()
1530 spin_lock(&xprt->queue_lock); in xprt_transmit()
1532 if (status == 0) { in xprt_transmit()
1533 if (!xprt_request_data_received(task) || in xprt_transmit()
1534 test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) in xprt_transmit()
1536 } else if (test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) in xprt_transmit()
1537 task->tk_status = status; in xprt_transmit()
1540 spin_unlock(&xprt->queue_lock); in xprt_transmit()
1545 set_bit(XPRT_CONGESTED, &xprt->state); in xprt_add_backlog()
1546 rpc_sleep_on(&xprt->backlog, task, NULL); in xprt_add_backlog()
1551 if (rpc_wake_up_next(&xprt->backlog) == NULL) in xprt_wake_up_backlog()
1552 clear_bit(XPRT_CONGESTED, &xprt->state); in xprt_wake_up_backlog()
1559 if (!test_bit(XPRT_CONGESTED, &xprt->state)) in xprt_throttle_congested()
1561 spin_lock(&xprt->reserve_lock); in xprt_throttle_congested()
1562 if (test_bit(XPRT_CONGESTED, &xprt->state)) { in xprt_throttle_congested()
1563 rpc_sleep_on(&xprt->backlog, task, NULL); in xprt_throttle_congested()
1566 spin_unlock(&xprt->reserve_lock); in xprt_throttle_congested()
1573 struct rpc_rqst *req = ERR_PTR(-EAGAIN); in xprt_dynamic_alloc_slot()
1575 if (xprt->num_reqs >= xprt->max_reqs) in xprt_dynamic_alloc_slot()
1577 ++xprt->num_reqs; in xprt_dynamic_alloc_slot()
1578 spin_unlock(&xprt->reserve_lock); in xprt_dynamic_alloc_slot()
1580 spin_lock(&xprt->reserve_lock); in xprt_dynamic_alloc_slot()
1581 if (req != NULL) in xprt_dynamic_alloc_slot()
1583 --xprt->num_reqs; in xprt_dynamic_alloc_slot()
1584 req = ERR_PTR(-ENOMEM); in xprt_dynamic_alloc_slot()
1591 if (xprt->num_reqs > xprt->min_reqs) { in xprt_dynamic_free_slot()
1592 --xprt->num_reqs; in xprt_dynamic_free_slot()
1603 spin_lock(&xprt->reserve_lock); in xprt_alloc_slot()
1604 if (!list_empty(&xprt->free)) { in xprt_alloc_slot()
1605 req = list_entry(xprt->free.next, struct rpc_rqst, rq_list); in xprt_alloc_slot()
1606 list_del(&req->rq_list); in xprt_alloc_slot()
1610 if (!IS_ERR(req)) in xprt_alloc_slot()
1613 case -ENOMEM: in xprt_alloc_slot()
1614 dprintk("RPC: dynamic allocation of request slot " in xprt_alloc_slot()
1616 task->tk_status = -ENOMEM; in xprt_alloc_slot()
1618 case -EAGAIN: in xprt_alloc_slot()
1620 dprintk("RPC: waiting for request slot\n"); in xprt_alloc_slot()
1623 task->tk_status = -EAGAIN; in xprt_alloc_slot()
1625 spin_unlock(&xprt->reserve_lock); in xprt_alloc_slot()
1628 xprt->stat.max_slots = max_t(unsigned int, xprt->stat.max_slots, in xprt_alloc_slot()
1629 xprt->num_reqs); in xprt_alloc_slot()
1630 spin_unlock(&xprt->reserve_lock); in xprt_alloc_slot()
1632 task->tk_status = 0; in xprt_alloc_slot()
1633 task->tk_rqstp = req; in xprt_alloc_slot()
1639 spin_lock(&xprt->reserve_lock); in xprt_free_slot()
1640 if (!xprt_dynamic_free_slot(xprt, req)) { in xprt_free_slot()
1642 list_add(&req->rq_list, &xprt->free); in xprt_free_slot()
1645 spin_unlock(&xprt->reserve_lock); in xprt_free_slot()
1652 while (!list_empty(&xprt->free)) { in xprt_free_all_slots()
1653 req = list_first_entry(&xprt->free, struct rpc_rqst, rq_list); in xprt_free_all_slots()
1654 list_del(&req->rq_list); in xprt_free_all_slots()
1668 if (xprt == NULL) in xprt_alloc()
1675 if (!req) in xprt_alloc()
1677 list_add(&req->rq_list, &xprt->free); in xprt_alloc()
1679 if (max_alloc > num_prealloc) in xprt_alloc()
1680 xprt->max_reqs = max_alloc; in xprt_alloc()
1682 xprt->max_reqs = num_prealloc; in xprt_alloc()
1683 xprt->min_reqs = num_prealloc; in xprt_alloc()
1684 xprt->num_reqs = num_prealloc; in xprt_alloc()
1697 put_net(xprt->xprt_net); in xprt_free()
1706 req->rq_connect_cookie = xprt_connect_cookie(xprt) - 1; in xprt_init_connect_cookie()
1714 spin_lock(&xprt->reserve_lock); in xprt_alloc_xid()
1715 xid = (__force __be32)xprt->xid++; in xprt_alloc_xid()
1716 spin_unlock(&xprt->reserve_lock); in xprt_alloc_xid()
1723 xprt->xid = prandom_u32(); in xprt_init_xid()
1729 struct rpc_xprt *xprt = task->tk_xprt; in xprt_request_init()
1730 struct rpc_rqst *req = task->tk_rqstp; in xprt_request_init()
1732 req->rq_task = task; in xprt_request_init()
1733 req->rq_xprt = xprt; in xprt_request_init()
1734 req->rq_buffer = NULL; in xprt_request_init()
1735 req->rq_xid = xprt_alloc_xid(xprt); in xprt_request_init()
1737 req->rq_snd_buf.len = 0; in xprt_request_init()
1738 req->rq_snd_buf.buflen = 0; in xprt_request_init()
1739 req->rq_rcv_buf.len = 0; in xprt_request_init()
1740 req->rq_rcv_buf.buflen = 0; in xprt_request_init()
1741 req->rq_snd_buf.bvec = NULL; in xprt_request_init()
1742 req->rq_rcv_buf.bvec = NULL; in xprt_request_init()
1743 req->rq_release_snd_buf = NULL; in xprt_request_init()
1752 xprt->ops->alloc_slot(xprt, task); in xprt_do_reserve()
1753 if (task->tk_rqstp != NULL) in xprt_do_reserve()
1758 * xprt_reserve - allocate an RPC request slot
1759 * @task: RPC task requesting a slot allocation
1761 * If the transport is marked as being congested, or if no more
1767 struct rpc_xprt *xprt = task->tk_xprt; in xprt_reserve()
1769 task->tk_status = 0; in xprt_reserve()
1770 if (task->tk_rqstp != NULL) in xprt_reserve()
1773 task->tk_status = -EAGAIN; in xprt_reserve()
1774 if (!xprt_throttle_congested(xprt, task)) in xprt_reserve()
1779 * xprt_retry_reserve - allocate an RPC request slot
1780 * @task: RPC task requesting a slot allocation
1782 * If no more slots are available, place the task on the transport's
1789 struct rpc_xprt *xprt = task->tk_xprt; in xprt_retry_reserve()
1791 task->tk_status = 0; in xprt_retry_reserve()
1792 if (task->tk_rqstp != NULL) in xprt_retry_reserve()
1795 task->tk_status = -EAGAIN; in xprt_retry_reserve()
1800 * xprt_release - release an RPC request slot
1807 struct rpc_rqst *req = task->tk_rqstp; in xprt_release()
1809 if (req == NULL) { in xprt_release()
1810 if (task->tk_client) { in xprt_release()
1811 xprt = task->tk_xprt; in xprt_release()
1817 xprt = req->rq_xprt; in xprt_release()
1819 spin_lock(&xprt->transport_lock); in xprt_release()
1820 xprt->ops->release_xprt(xprt, task); in xprt_release()
1821 if (xprt->ops->release_request) in xprt_release()
1822 xprt->ops->release_request(task); in xprt_release()
1824 spin_unlock(&xprt->transport_lock); in xprt_release()
1825 if (req->rq_buffer) in xprt_release()
1826 xprt->ops->buf_free(task); in xprt_release()
1828 xdr_free_bvec(&req->rq_rcv_buf); in xprt_release()
1829 xdr_free_bvec(&req->rq_snd_buf); in xprt_release()
1830 if (req->rq_cred != NULL) in xprt_release()
1831 put_rpccred(req->rq_cred); in xprt_release()
1832 task->tk_rqstp = NULL; in xprt_release()
1833 if (req->rq_release_snd_buf) in xprt_release()
1834 req->rq_release_snd_buf(req); in xprt_release()
1836 if (likely(!bc_prealloc(req))) in xprt_release()
1837 xprt->ops->free_slot(xprt, req); in xprt_release()
1846 struct xdr_buf *xbufp = &req->rq_snd_buf; in xprt_init_bc_request()
1848 task->tk_rqstp = req; in xprt_init_bc_request()
1849 req->rq_task = task; in xprt_init_bc_request()
1850 xprt_init_connect_cookie(req, req->rq_xprt); in xprt_init_bc_request()
1855 xbufp->len = xbufp->head[0].iov_len + xbufp->page_len + in xprt_init_bc_request()
1856 xbufp->tail[0].iov_len; in xprt_init_bc_request()
1862 kref_init(&xprt->kref); in xprt_init()
1864 spin_lock_init(&xprt->transport_lock); in xprt_init()
1865 spin_lock_init(&xprt->reserve_lock); in xprt_init()
1866 spin_lock_init(&xprt->queue_lock); in xprt_init()
1868 INIT_LIST_HEAD(&xprt->free); in xprt_init()
1869 xprt->recv_queue = RB_ROOT; in xprt_init()
1870 INIT_LIST_HEAD(&xprt->xmit_queue); in xprt_init()
1871 #if defined(CONFIG_SUNRPC_BACKCHANNEL) in xprt_init()
1872 spin_lock_init(&xprt->bc_pa_lock); in xprt_init()
1873 INIT_LIST_HEAD(&xprt->bc_pa_list); in xprt_init()
1875 INIT_LIST_HEAD(&xprt->xprt_switch); in xprt_init()
1877 xprt->last_used = jiffies; in xprt_init()
1878 xprt->cwnd = RPC_INITCWND; in xprt_init()
1879 xprt->bind_index = 0; in xprt_init()
1881 rpc_init_wait_queue(&xprt->binding, "xprt_binding"); in xprt_init()
1882 rpc_init_wait_queue(&xprt->pending, "xprt_pending"); in xprt_init()
1883 rpc_init_wait_queue(&xprt->sending, "xprt_sending"); in xprt_init()
1884 rpc_init_priority_wait_queue(&xprt->backlog, "xprt_backlog"); in xprt_init()
1888 xprt->xprt_net = get_net(net); in xprt_init()
1892 * xprt_create_transport - create an RPC transport
1893 * @args: rpc transport creation arguments
1903 if (t->ident == args->ident) { in xprt_create_transport()
1909 dprintk("RPC: transport (%d) not supported\n", args->ident); in xprt_create_transport()
1910 return ERR_PTR(-EIO); in xprt_create_transport()
1913 xprt = t->setup(args); in xprt_create_transport()
1914 if (IS_ERR(xprt)) in xprt_create_transport()
1916 if (args->flags & XPRT_CREATE_NO_IDLE_TIMEOUT) in xprt_create_transport()
1917 xprt->idle_timeout = 0; in xprt_create_transport()
1918 INIT_WORK(&xprt->task_cleanup, xprt_autoclose); in xprt_create_transport()
1919 if (xprt_has_timer(xprt)) in xprt_create_transport()
1920 timer_setup(&xprt->timer, xprt_init_autodisconnect, 0); in xprt_create_transport()
1922 timer_setup(&xprt->timer, NULL, 0); in xprt_create_transport()
1924 if (strlen(args->servername) > RPC_MAXNETNAMELEN) { in xprt_create_transport()
1926 return ERR_PTR(-EINVAL); in xprt_create_transport()
1928 xprt->servername = kstrdup(args->servername, GFP_KERNEL); in xprt_create_transport()
1929 if (xprt->servername == NULL) { in xprt_create_transport()
1931 return ERR_PTR(-ENOMEM); in xprt_create_transport()
1949 rpc_destroy_wait_queue(&xprt->binding); in xprt_destroy_cb()
1950 rpc_destroy_wait_queue(&xprt->pending); in xprt_destroy_cb()
1951 rpc_destroy_wait_queue(&xprt->sending); in xprt_destroy_cb()
1952 rpc_destroy_wait_queue(&xprt->backlog); in xprt_destroy_cb()
1953 kfree(xprt->servername); in xprt_destroy_cb()
1962 xprt->ops->destroy(xprt); in xprt_destroy_cb()
1966 * xprt_destroy - destroy an RPC transport, killing off all requests.
1975 wait_on_bit_lock(&xprt->state, XPRT_LOCKED, TASK_UNINTERRUPTIBLE); in xprt_destroy()
1977 del_timer_sync(&xprt->timer); in xprt_destroy()
1983 INIT_WORK(&xprt->task_cleanup, xprt_destroy_cb); in xprt_destroy()
1984 schedule_work(&xprt->task_cleanup); in xprt_destroy()
1993 * xprt_get - return a reference to an RPC transport.
1999 if (xprt != NULL && kref_get_unless_zero(&xprt->kref)) in xprt_get()
2006 * xprt_put - release a reference to an RPC transport.
2012 if (xprt != NULL) in xprt_put()
2013 kref_put(&xprt->kref, xprt_destroy_kref); in xprt_put()