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Willy Tarreaucff64112008-11-03 06:26:53 +01001/*
2 * Functions managing stream_interface structures
3 *
Willy Tarreauf873d752012-05-11 17:47:17 +02004 * Copyright 2000-2012 Willy Tarreau <w@1wt.eu>
Willy Tarreaucff64112008-11-03 06:26:53 +01005 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
13#include <errno.h>
14#include <fcntl.h>
15#include <stdio.h>
16#include <stdlib.h>
17
18#include <sys/socket.h>
19#include <sys/stat.h>
20#include <sys/types.h>
21
Willy Tarreaubf883e02014-11-25 21:10:35 +010022#include <common/buffer.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010023#include <common/compat.h>
24#include <common/config.h>
25#include <common/debug.h>
26#include <common/standard.h>
27#include <common/ticks.h>
28#include <common/time.h>
29
Willy Tarreau8a8d83b2015-04-13 13:24:54 +020030#include <proto/applet.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020031#include <proto/channel.h>
Willy Tarreau8b117082012-08-06 15:06:49 +020032#include <proto/connection.h>
Willy Tarreau96199b12012-08-24 00:46:52 +020033#include <proto/pipe.h>
Willy Tarreau87b09662015-04-03 00:22:06 +020034#include <proto/stream.h>
Willy Tarreau269358d2009-09-20 20:14:49 +020035#include <proto/stream_interface.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010036#include <proto/task.h>
37
Willy Tarreaufd31e532012-07-23 18:24:25 +020038#include <types/pipe.h>
39
Willy Tarreauf873d752012-05-11 17:47:17 +020040/* socket functions used when running a stream interface as a task */
Willy Tarreauf873d752012-05-11 17:47:17 +020041static void stream_int_update_embedded(struct stream_interface *si);
Willy Tarreau6fe15412013-09-29 15:16:03 +020042static void stream_int_shutr(struct stream_interface *si);
43static void stream_int_shutw(struct stream_interface *si);
Willy Tarreauf873d752012-05-11 17:47:17 +020044static void stream_int_chk_rcv(struct stream_interface *si);
45static void stream_int_chk_snd(struct stream_interface *si);
Willy Tarreauc5788912012-08-24 18:12:41 +020046static void stream_int_update_conn(struct stream_interface *si);
Willy Tarreau6fe15412013-09-29 15:16:03 +020047static void stream_int_shutr_conn(struct stream_interface *si);
48static void stream_int_shutw_conn(struct stream_interface *si);
Willy Tarreauc5788912012-08-24 18:12:41 +020049static void stream_int_chk_rcv_conn(struct stream_interface *si);
50static void stream_int_chk_snd_conn(struct stream_interface *si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +020051static void stream_int_update_applet(struct stream_interface *si);
52static void stream_int_shutr_applet(struct stream_interface *si);
53static void stream_int_shutw_applet(struct stream_interface *si);
54static void stream_int_chk_rcv_applet(struct stream_interface *si);
55static void stream_int_chk_snd_applet(struct stream_interface *si);
Willy Tarreau4aa36832012-10-02 20:07:22 +020056static void si_conn_recv_cb(struct connection *conn);
57static void si_conn_send_cb(struct connection *conn);
Willy Tarreau2396c1c2012-10-03 21:12:16 +020058static int si_conn_wake_cb(struct connection *conn);
Willy Tarreau27375622013-12-17 00:00:28 +010059static int si_idle_conn_wake_cb(struct connection *conn);
60static void si_idle_conn_null_cb(struct connection *conn);
Willy Tarreauf873d752012-05-11 17:47:17 +020061
Willy Tarreauc5788912012-08-24 18:12:41 +020062/* stream-interface operations for embedded tasks */
63struct si_ops si_embedded_ops = {
Willy Tarreau5c979a92012-05-07 17:15:39 +020064 .update = stream_int_update_embedded,
Willy Tarreau5c979a92012-05-07 17:15:39 +020065 .chk_rcv = stream_int_chk_rcv,
66 .chk_snd = stream_int_chk_snd,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020067 .shutr = stream_int_shutr,
68 .shutw = stream_int_shutw,
Willy Tarreau5c979a92012-05-07 17:15:39 +020069};
70
Willy Tarreauc5788912012-08-24 18:12:41 +020071/* stream-interface operations for connections */
72struct si_ops si_conn_ops = {
73 .update = stream_int_update_conn,
74 .chk_rcv = stream_int_chk_rcv_conn,
75 .chk_snd = stream_int_chk_snd_conn,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020076 .shutr = stream_int_shutr_conn,
77 .shutw = stream_int_shutw_conn,
Willy Tarreauc5788912012-08-24 18:12:41 +020078};
79
Willy Tarreaud45b9f82015-04-13 16:30:14 +020080/* stream-interface operations for connections */
81struct si_ops si_applet_ops = {
82 .update = stream_int_update_applet,
83 .chk_rcv = stream_int_chk_rcv_applet,
84 .chk_snd = stream_int_chk_snd_applet,
85 .shutr = stream_int_shutr_applet,
86 .shutw = stream_int_shutw_applet,
87};
88
Willy Tarreau74beec32012-10-03 00:41:04 +020089struct data_cb si_conn_cb = {
Willy Tarreauc5788912012-08-24 18:12:41 +020090 .recv = si_conn_recv_cb,
91 .send = si_conn_send_cb,
Willy Tarreau4aa36832012-10-02 20:07:22 +020092 .wake = si_conn_wake_cb,
Willy Tarreauc5788912012-08-24 18:12:41 +020093};
94
Willy Tarreau27375622013-12-17 00:00:28 +010095struct data_cb si_idle_conn_cb = {
96 .recv = si_idle_conn_null_cb,
97 .send = si_idle_conn_null_cb,
98 .wake = si_idle_conn_wake_cb,
99};
100
Willy Tarreaucff64112008-11-03 06:26:53 +0100101/*
102 * This function only has to be called once after a wakeup event in case of
103 * suspected timeout. It controls the stream interface timeouts and sets
104 * si->flags accordingly. It does NOT close anything, as this timeout may
105 * be used for any purpose. It returns 1 if the timeout fired, otherwise
106 * zero.
107 */
108int stream_int_check_timeouts(struct stream_interface *si)
109{
110 if (tick_is_expired(si->exp, now_ms)) {
111 si->flags |= SI_FL_EXP;
112 return 1;
113 }
114 return 0;
115}
116
Willy Tarreaufe3718a2008-11-30 18:14:12 +0100117/* to be called only when in SI_ST_DIS with SI_FL_ERR */
Willy Tarreaucff64112008-11-03 06:26:53 +0100118void stream_int_report_error(struct stream_interface *si)
119{
120 if (!si->err_type)
121 si->err_type = SI_ET_DATA_ERR;
122
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100123 si_oc(si)->flags |= CF_WRITE_ERROR;
124 si_ic(si)->flags |= CF_READ_ERROR;
Willy Tarreaucff64112008-11-03 06:26:53 +0100125}
126
127/*
Willy Tarreaudded32d2008-11-30 19:48:07 +0100128 * Returns a message to the client ; the connection is shut down for read,
129 * and the request is cleared so that no server connection can be initiated.
130 * The buffer is marked for read shutdown on the other side to protect the
131 * message, and the buffer write is enabled. The message is contained in a
Willy Tarreau148d0992010-01-10 10:21:21 +0100132 * "chunk". If it is null, then an empty message is used. The reply buffer does
133 * not need to be empty before this, and its contents will not be overwritten.
134 * The primary goal of this function is to return error messages to a client.
Willy Tarreaudded32d2008-11-30 19:48:07 +0100135 */
136void stream_int_retnclose(struct stream_interface *si, const struct chunk *msg)
137{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100138 struct channel *ic = si_ic(si);
139 struct channel *oc = si_oc(si);
140
141 channel_auto_read(ic);
142 channel_abort(ic);
143 channel_auto_close(ic);
144 channel_erase(ic);
145 channel_truncate(oc);
Willy Tarreau798e1282010-12-12 13:06:00 +0100146
Willy Tarreau148d0992010-01-10 10:21:21 +0100147 if (likely(msg && msg->len))
Willy Tarreauafc8a222014-11-28 15:46:27 +0100148 bo_inject(oc, msg->str, msg->len);
Willy Tarreaudded32d2008-11-30 19:48:07 +0100149
Willy Tarreauafc8a222014-11-28 15:46:27 +0100150 oc->wex = tick_add_ifset(now_ms, oc->wto);
151 channel_auto_read(oc);
152 channel_auto_close(oc);
153 channel_shutr_now(oc);
Willy Tarreau5d881d02009-12-27 22:51:06 +0100154}
155
Willy Tarreaufb90d942009-09-05 20:57:35 +0200156/* default update function for embedded tasks, to be used at the end of the i/o handler */
Willy Tarreauf873d752012-05-11 17:47:17 +0200157static void stream_int_update_embedded(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200158{
Willy Tarreau3488e252010-08-09 16:24:56 +0200159 int old_flags = si->flags;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100160 struct channel *ic = si_ic(si);
161 struct channel *oc = si_oc(si);
Willy Tarreau3488e252010-08-09 16:24:56 +0200162
Willy Tarreauafc8a222014-11-28 15:46:27 +0100163 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200164 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100165 si, si->state, ic->flags, oc->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200166
167 if (si->state != SI_ST_EST)
168 return;
169
Willy Tarreauafc8a222014-11-28 15:46:27 +0100170 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW &&
171 channel_is_empty(oc))
Willy Tarreau73b013b2012-05-21 16:31:45 +0200172 si_shutw(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200173
Willy Tarreauafc8a222014-11-28 15:46:27 +0100174 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0 && channel_may_recv(oc))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200175 si->flags |= SI_FL_WAIT_DATA;
176
Willy Tarreau96fd4b52009-10-04 17:18:35 +0200177 /* we're almost sure that we need some space if the buffer is not
178 * empty, even if it's not full, because the applets can't fill it.
179 */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100180 if ((ic->flags & (CF_SHUTR|CF_DONT_READ)) == 0 && !channel_is_empty(ic))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200181 si->flags |= SI_FL_WAIT_ROOM;
182
Willy Tarreauafc8a222014-11-28 15:46:27 +0100183 if (oc->flags & CF_WRITE_ACTIVITY) {
184 if (tick_isset(oc->wex))
185 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200186 }
187
Willy Tarreauafc8a222014-11-28 15:46:27 +0100188 if (ic->flags & CF_READ_ACTIVITY ||
189 (oc->flags & CF_WRITE_ACTIVITY && !(si->flags & SI_FL_INDEP_STR))) {
190 if (tick_isset(ic->rex))
191 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreauf27b5ea2009-10-03 22:01:18 +0200192 }
193
Willy Tarreau3488e252010-08-09 16:24:56 +0200194 /* save flags to detect changes */
195 old_flags = si->flags;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100196 if (likely((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL|CF_DONT_READ)) == CF_WRITE_PARTIAL &&
197 channel_may_recv(oc) &&
Willy Tarreau50fe03b2014-11-28 13:59:31 +0100198 (si_opposite(si)->flags & SI_FL_WAIT_ROOM)))
199 si_chk_rcv(si_opposite(si));
Willy Tarreaufb90d942009-09-05 20:57:35 +0200200
Willy Tarreauafc8a222014-11-28 15:46:27 +0100201 if (((ic->flags & CF_READ_PARTIAL) && !channel_is_empty(ic)) &&
202 (ic->pipe /* always try to send spliced data */ ||
203 (ic->buf->i == 0 && (si_opposite(si)->flags & SI_FL_WAIT_DATA)))) {
Willy Tarreau50fe03b2014-11-28 13:59:31 +0100204 si_chk_snd(si_opposite(si));
Willy Tarreau3488e252010-08-09 16:24:56 +0200205 /* check if the consumer has freed some space */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100206 if (channel_may_recv(ic) && !ic->pipe)
Willy Tarreau3488e252010-08-09 16:24:56 +0200207 si->flags &= ~SI_FL_WAIT_ROOM;
208 }
Willy Tarreaufb90d942009-09-05 20:57:35 +0200209
210 /* Note that we're trying to wake up in two conditions here :
211 * - special event, which needs the holder task attention
212 * - status indicating that the applet can go on working. This
213 * is rather hard because we might be blocking on output and
214 * don't want to wake up on input and vice-versa. The idea is
Willy Tarreau3488e252010-08-09 16:24:56 +0200215 * to only rely on the changes the chk_* might have performed.
Willy Tarreaufb90d942009-09-05 20:57:35 +0200216 */
217 if (/* check stream interface changes */
Willy Tarreau3488e252010-08-09 16:24:56 +0200218 ((old_flags & ~si->flags) & (SI_FL_WAIT_ROOM|SI_FL_WAIT_DATA)) ||
219
220 /* changes on the production side */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100221 (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) ||
Willy Tarreau3488e252010-08-09 16:24:56 +0200222 si->state != SI_ST_EST ||
223 (si->flags & SI_FL_ERR) ||
Willy Tarreauafc8a222014-11-28 15:46:27 +0100224 ((ic->flags & CF_READ_PARTIAL) &&
225 (!ic->to_forward || si_opposite(si)->state != SI_ST_EST)) ||
Willy Tarreau3488e252010-08-09 16:24:56 +0200226
227 /* changes on the consumption side */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100228 (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) ||
229 ((oc->flags & CF_WRITE_ACTIVITY) &&
230 ((oc->flags & CF_SHUTW) ||
231 ((oc->flags & CF_WAKE_WRITE) &&
Willy Tarreau50fe03b2014-11-28 13:59:31 +0100232 (si_opposite(si)->state != SI_ST_EST ||
Willy Tarreauafc8a222014-11-28 15:46:27 +0100233 (channel_is_empty(oc) && !oc->to_forward)))))) {
Willy Tarreau07373b82014-11-28 12:08:47 +0100234 if (!(si->flags & SI_FL_DONT_WAKE))
235 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200236 }
Willy Tarreauafc8a222014-11-28 15:46:27 +0100237 if (ic->flags & CF_READ_ACTIVITY)
238 ic->flags &= ~CF_READ_DONTWAIT;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200239}
240
Willy Tarreau4a36b562012-08-06 19:31:45 +0200241/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200242 * This function performs a shutdown-read on a detached stream interface in a
243 * connected or init state (it does nothing for other states). It either shuts
244 * the read side or marks itself as closed. The buffer flags are updated to
245 * reflect the new state. If the stream interface has SI_FL_NOHALF, we also
246 * forward the close to the write side. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200247 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200248static void stream_int_shutr(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200249{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100250 struct channel *ic = si_ic(si);
251
252 ic->flags &= ~CF_SHUTR_NOW;
253 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200254 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100255 ic->flags |= CF_SHUTR;
256 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200257 si->flags &= ~SI_FL_WAIT_ROOM;
258
259 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200260 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200261
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100262 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200263 si->state = SI_ST_DIS;
264 si->exp = TICK_ETERNITY;
Willy Tarreaud8ccffe2010-09-07 16:16:50 +0200265 }
Willy Tarreau4a36b562012-08-06 19:31:45 +0200266 else if (si->flags & SI_FL_NOHALF) {
267 /* we want to immediately forward this close to the write side */
268 return stream_int_shutw(si);
269 }
Willy Tarreau0bd05ea2010-07-02 11:18:03 +0200270
Willy Tarreau4a36b562012-08-06 19:31:45 +0200271 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100272 if (!(si->flags & SI_FL_DONT_WAKE))
273 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200274}
275
Willy Tarreau4a36b562012-08-06 19:31:45 +0200276/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200277 * This function performs a shutdown-write on a detached stream interface in a
278 * connected or init state (it does nothing for other states). It either shuts
279 * the write side or marks itself as closed. The buffer flags are updated to
280 * reflect the new state. It does also close everything if the SI was marked as
281 * being in error state. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200282 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200283static void stream_int_shutw(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200284{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100285 struct channel *ic = si_ic(si);
286 struct channel *oc = si_oc(si);
287
288 oc->flags &= ~CF_SHUTW_NOW;
289 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200290 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100291 oc->flags |= CF_SHUTW;
292 oc->wex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200293 si->flags &= ~SI_FL_WAIT_DATA;
294
295 switch (si->state) {
296 case SI_ST_EST:
Willy Tarreau4a36b562012-08-06 19:31:45 +0200297 /* we have to shut before closing, otherwise some short messages
298 * may never leave the system, especially when there are remaining
299 * unread data in the socket input buffer, or when nolinger is set.
300 * However, if SI_FL_NOLINGER is explicitly set, we know there is
301 * no risk so we close both sides immediately.
302 */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200303 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
Willy Tarreauafc8a222014-11-28 15:46:27 +0100304 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
Willy Tarreau6fe15412013-09-29 15:16:03 +0200305 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200306
307 /* fall through */
308 case SI_ST_CON:
309 case SI_ST_CER:
Willy Tarreau32d3ee92010-12-29 14:03:02 +0100310 case SI_ST_QUE:
311 case SI_ST_TAR:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200312 /* Note that none of these states may happen with applets */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200313 si->state = SI_ST_DIS;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200314 default:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200315 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100316 ic->flags &= ~CF_SHUTR_NOW;
317 ic->flags |= CF_SHUTR;
318 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200319 si->exp = TICK_ETERNITY;
320 }
321
Willy Tarreau4a36b562012-08-06 19:31:45 +0200322 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100323 if (!(si->flags & SI_FL_DONT_WAKE))
324 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200325}
326
327/* default chk_rcv function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200328static void stream_int_chk_rcv(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200329{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100330 struct channel *ic = si_ic(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200331
Willy Tarreauafc8a222014-11-28 15:46:27 +0100332 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200333 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100334 si, si->state, ic->flags, si_oc(si)->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200335
Willy Tarreauafc8a222014-11-28 15:46:27 +0100336 if (unlikely(si->state != SI_ST_EST || (ic->flags & (CF_SHUTR|CF_DONT_READ))))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200337 return;
338
Willy Tarreauafc8a222014-11-28 15:46:27 +0100339 if (!channel_may_recv(ic) || ic->pipe) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200340 /* stop reading */
Willy Tarreau3bf1b2b2012-08-27 20:46:07 +0200341 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200342 }
343 else {
344 /* (re)start reading */
345 si->flags &= ~SI_FL_WAIT_ROOM;
Willy Tarreau07373b82014-11-28 12:08:47 +0100346 if (!(si->flags & SI_FL_DONT_WAKE))
347 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200348 }
349}
350
351/* default chk_snd function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200352static void stream_int_chk_snd(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200353{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100354 struct channel *oc = si_oc(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200355
Willy Tarreauafc8a222014-11-28 15:46:27 +0100356 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200357 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100358 si, si->state, si_ic(si)->flags, oc->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200359
Willy Tarreauafc8a222014-11-28 15:46:27 +0100360 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200361 return;
362
363 if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100364 channel_is_empty(oc)) /* called with nothing to send ! */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200365 return;
366
367 /* Otherwise there are remaining data to be sent in the buffer,
368 * so we tell the handler.
369 */
370 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100371 if (!tick_isset(oc->wex))
372 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200373
Willy Tarreau07373b82014-11-28 12:08:47 +0100374 if (!(si->flags & SI_FL_DONT_WAKE))
375 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200376}
377
Willy Tarreau1fbe1c92013-12-01 09:35:41 +0100378/* Register an applet to handle a stream_interface as part of the
379 * stream interface's owner task. The SI will wake it up everytime it
380 * is solicited. The task's processing function must call the applet's
381 * function before returning. It must be deleted by the task handler
382 * using stream_int_unregister_handler(), possibly from within the
383 * function itself. It also pre-initializes the applet's context and
384 * returns it (or NULL in case it could not be allocated).
Willy Tarreaufb90d942009-09-05 20:57:35 +0200385 */
Willy Tarreau30576452015-04-13 13:50:30 +0200386struct appctx *stream_int_register_handler(struct stream_interface *si, struct applet *app)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200387{
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100388 struct appctx *appctx;
389
Willy Tarreau07373b82014-11-28 12:08:47 +0100390 DPRINTF(stderr, "registering handler %p for si %p (was %p)\n", app, si, si_task(si));
Willy Tarreaufb90d942009-09-05 20:57:35 +0200391
Willy Tarreaua7513f52015-04-05 00:15:26 +0200392 appctx = si_alloc_appctx(si, app);
Willy Tarreaua69fc9f2014-12-22 19:34:00 +0100393 if (!appctx)
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100394 return NULL;
395
Willy Tarreaufe127932015-04-21 19:23:39 +0200396 si_applet_cant_get(si);
Willy Tarreau828824a2015-04-19 17:20:03 +0200397 appctx_wakeup(appctx);
Willy Tarreau1fbe1c92013-12-01 09:35:41 +0100398 return si_appctx(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200399}
400
Willy Tarreaufb90d942009-09-05 20:57:35 +0200401/* Unregister a stream interface handler. This must be called by the handler task
Willy Tarreau128b03c2012-11-11 23:14:16 +0100402 * itself when it detects that it is in the SI_ST_DIS state.
Willy Tarreaufb90d942009-09-05 20:57:35 +0200403 */
404void stream_int_unregister_handler(struct stream_interface *si)
405{
Willy Tarreau32e3c6a2013-10-11 19:34:20 +0200406 si_detach(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200407}
408
Willy Tarreau2c6be842012-07-06 17:12:34 +0200409/* This callback is used to send a valid PROXY protocol line to a socket being
Willy Tarreauafad0e02012-08-09 14:45:22 +0200410 * established. It returns 0 if it fails in a fatal way or needs to poll to go
411 * further, otherwise it returns non-zero and removes itself from the connection's
Willy Tarreaua1a74742012-08-24 12:14:49 +0200412 * flags (the bit is provided in <flag> by the caller). It is designed to be
413 * called by the connection handler and relies on it to commit polling changes.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200414 * Note that it can emit a PROXY line by relying on the other end's address
415 * when the connection is attached to a stream interface, or by resolving the
416 * local address otherwise (also called a LOCAL line).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200417 */
418int conn_si_send_proxy(struct connection *conn, unsigned int flag)
419{
Willy Tarreau2c6be842012-07-06 17:12:34 +0200420 /* we might have been called just after an asynchronous shutw */
Willy Tarreaua1a74742012-08-24 12:14:49 +0200421 if (conn->flags & CO_FL_SOCK_WR_SH)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200422 goto out_error;
423
Willy Tarreaud02cdd22013-12-15 10:23:20 +0100424 if (!conn_ctrl_ready(conn))
Willy Tarreauf79c8172013-10-21 16:30:56 +0200425 goto out_error;
426
Willy Tarreau2c6be842012-07-06 17:12:34 +0200427 /* If we have a PROXY line to send, we'll use this to validate the
428 * connection, in which case the connection is validated only once
429 * we've sent the whole proxy line. Otherwise we use connect().
430 */
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200431 while (conn->send_proxy_ofs) {
Willy Tarreau2c6be842012-07-06 17:12:34 +0200432 int ret;
433
434 /* The target server expects a PROXY line to be sent first.
435 * If the send_proxy_ofs is negative, it corresponds to the
436 * offset to start sending from then end of the proxy string
437 * (which is recomputed every time since it's constant). If
438 * it is positive, it means we have to send from the start.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200439 * We can only send a "normal" PROXY line when the connection
440 * is attached to a stream interface. Otherwise we can only
441 * send a LOCAL line (eg: for use with health checks).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200442 */
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200443 if (conn->data == &si_conn_cb) {
444 struct stream_interface *si = conn->owner;
Willy Tarreau50fe03b2014-11-28 13:59:31 +0100445 struct connection *remote = objt_conn(si_opposite(si)->end);
David Safb76832014-05-08 23:42:08 -0400446 ret = make_proxy_line(trash.str, trash.size, objt_server(conn->target), remote);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200447 }
448 else {
449 /* The target server expects a LOCAL line to be sent first. Retrieving
450 * local or remote addresses may fail until the connection is established.
451 */
452 conn_get_from_addr(conn);
453 if (!(conn->flags & CO_FL_ADDR_FROM_SET))
454 goto out_wait;
455
456 conn_get_to_addr(conn);
457 if (!(conn->flags & CO_FL_ADDR_TO_SET))
458 goto out_wait;
459
David Safb76832014-05-08 23:42:08 -0400460 ret = make_proxy_line(trash.str, trash.size, objt_server(conn->target), conn);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200461 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200462
Willy Tarreau2c6be842012-07-06 17:12:34 +0200463 if (!ret)
464 goto out_error;
465
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200466 if (conn->send_proxy_ofs > 0)
467 conn->send_proxy_ofs = -ret; /* first call */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200468
Willy Tarreaua1a74742012-08-24 12:14:49 +0200469 /* we have to send trash from (ret+sp for -sp bytes). If the
470 * data layer has a pending write, we'll also set MSG_MORE.
471 */
Willy Tarreau0a03c0f2015-03-13 00:05:28 +0100472 ret = conn_sock_send(conn, trash.str + ret + conn->send_proxy_ofs, -conn->send_proxy_ofs,
473 (conn->flags & CO_FL_DATA_WR_ENA) ? MSG_MORE : 0);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200474
Willy Tarreau0a03c0f2015-03-13 00:05:28 +0100475 if (ret < 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200476 goto out_error;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200477
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200478 conn->send_proxy_ofs += ret; /* becomes zero once complete */
479 if (conn->send_proxy_ofs != 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200480 goto out_wait;
481
482 /* OK we've sent the whole line, we're connected */
Willy Tarreau7fe45692013-12-04 23:37:56 +0100483 break;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200484 }
485
Willy Tarreaua1a74742012-08-24 12:14:49 +0200486 /* The connection is ready now, simply return and let the connection
487 * handler notify upper layers if needed.
Willy Tarreau2c6be842012-07-06 17:12:34 +0200488 */
489 if (conn->flags & CO_FL_WAIT_L4_CONN)
490 conn->flags &= ~CO_FL_WAIT_L4_CONN;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200491 conn->flags &= ~flag;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200492 return 1;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200493
494 out_error:
Willy Tarreauafad0e02012-08-09 14:45:22 +0200495 /* Write error on the file descriptor */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200496 conn->flags |= CO_FL_ERROR;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200497 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200498
499 out_wait:
Willy Tarreaua1a74742012-08-24 12:14:49 +0200500 __conn_sock_stop_recv(conn);
Willy Tarreauafad0e02012-08-09 14:45:22 +0200501 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200502}
503
Willy Tarreau27375622013-12-17 00:00:28 +0100504
505/* Tiny I/O callback called on recv/send I/O events on idle connections.
506 * It simply sets the CO_FL_SOCK_RD_SH flag so that si_idle_conn_wake_cb()
507 * is notified and can kill the connection.
508 */
509static void si_idle_conn_null_cb(struct connection *conn)
510{
Willy Tarreaud85c4852015-03-13 00:40:28 +0100511 conn_sock_drain(conn);
Willy Tarreau27375622013-12-17 00:00:28 +0100512}
513
514/* Callback to be used by connection I/O handlers when some activity is detected
515 * on an idle server connection. Its main purpose is to kill the connection once
516 * a close was detected on it. It returns 0 if it did nothing serious, or -1 if
517 * it killed the connection.
518 */
519static int si_idle_conn_wake_cb(struct connection *conn)
520{
521 struct stream_interface *si = conn->owner;
522
523 if (!conn_ctrl_ready(conn))
524 return 0;
525
526 if (conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH)) {
527 /* warning, we can't do anything on <conn> after this call ! */
528 conn_force_close(conn);
529 conn_free(conn);
530 si->end = NULL;
531 return -1;
532 }
533 return 0;
534}
535
Willy Tarreau100c4672012-08-20 12:06:26 +0200536/* Callback to be used by connection I/O handlers upon completion. It differs from
Willy Tarreau4aa36832012-10-02 20:07:22 +0200537 * the update function in that it is designed to be called by lower layers after I/O
Willy Tarreau100c4672012-08-20 12:06:26 +0200538 * events have been completed. It will also try to wake the associated task up if
Willy Tarreauf16723e2012-08-24 12:52:22 +0200539 * an important event requires special handling. It relies on the connection handler
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200540 * to commit any polling updates. The function always returns 0.
Willy Tarreau100c4672012-08-20 12:06:26 +0200541 */
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200542static int si_conn_wake_cb(struct connection *conn)
Willy Tarreaufd31e532012-07-23 18:24:25 +0200543{
Willy Tarreaue603e692012-09-27 22:20:41 +0200544 struct stream_interface *si = conn->owner;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100545 struct channel *ic = si_ic(si);
546 struct channel *oc = si_oc(si);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200547
Willy Tarreauafc8a222014-11-28 15:46:27 +0100548 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufd31e532012-07-23 18:24:25 +0200549 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100550 si, si->state, ic->flags, oc->flags);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200551
Willy Tarreau3c55ec22012-07-23 19:19:51 +0200552 if (conn->flags & CO_FL_ERROR)
553 si->flags |= SI_FL_ERR;
554
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200555 /* check for recent connection establishment */
Willy Tarreauc76ae332012-07-12 15:32:13 +0200556 if (unlikely(!(conn->flags & (CO_FL_WAIT_L4_CONN | CO_FL_WAIT_L6_CONN | CO_FL_CONNECTED)))) {
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200557 si->exp = TICK_ETERNITY;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100558 oc->flags |= CF_WRITE_NULL;
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200559 }
560
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200561 /* process consumer side */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100562 if (channel_is_empty(oc)) {
563 if (((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) &&
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200564 (si->state == SI_ST_EST))
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200565 stream_int_shutw_conn(si);
Willy Tarreauf16723e2012-08-24 12:52:22 +0200566 __conn_data_stop_send(conn);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100567 oc->wex = TICK_ETERNITY;
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200568 }
Willy Tarreaufd31e532012-07-23 18:24:25 +0200569
Willy Tarreauafc8a222014-11-28 15:46:27 +0100570 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0 && channel_may_recv(oc))
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200571 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200572
Willy Tarreauafc8a222014-11-28 15:46:27 +0100573 if (oc->flags & CF_WRITE_ACTIVITY) {
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200574 /* update timeouts if we have written something */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100575 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
576 !channel_is_empty(oc))
577 if (tick_isset(oc->wex))
578 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200579
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200580 if (!(si->flags & SI_FL_INDEP_STR))
Willy Tarreauafc8a222014-11-28 15:46:27 +0100581 if (tick_isset(ic->rex))
582 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200583
Willy Tarreauafc8a222014-11-28 15:46:27 +0100584 if (likely((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL|CF_DONT_READ)) == CF_WRITE_PARTIAL &&
585 channel_may_recv(oc) &&
Willy Tarreau50fe03b2014-11-28 13:59:31 +0100586 (si_opposite(si)->flags & SI_FL_WAIT_ROOM)))
587 si_chk_rcv(si_opposite(si));
Willy Tarreaufd31e532012-07-23 18:24:25 +0200588 }
589
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200590 /* process producer side.
591 * We might have some data the consumer is waiting for.
592 * We can do fast-forwarding, but we avoid doing this for partial
593 * buffers, because it is very likely that it will be done again
594 * immediately afterwards once the following data is parsed (eg:
595 * HTTP chunking).
596 */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100597 if (((ic->flags & CF_READ_PARTIAL) && !channel_is_empty(ic)) &&
598 (ic->pipe /* always try to send spliced data */ ||
Willy Tarreau50fe03b2014-11-28 13:59:31 +0100599 (si_ib(si)->i == 0 && (si_opposite(si)->flags & SI_FL_WAIT_DATA)))) {
Willy Tarreauafc8a222014-11-28 15:46:27 +0100600 int last_len = ic->pipe ? ic->pipe->data : 0;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200601
Willy Tarreau50fe03b2014-11-28 13:59:31 +0100602 si_chk_snd(si_opposite(si));
Willy Tarreaufd31e532012-07-23 18:24:25 +0200603
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200604 /* check if the consumer has freed some space either in the
605 * buffer or in the pipe.
606 */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100607 if (channel_may_recv(ic) &&
608 (!last_len || !ic->pipe || ic->pipe->data < last_len))
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200609 si->flags &= ~SI_FL_WAIT_ROOM;
610 }
Willy Tarreaufd31e532012-07-23 18:24:25 +0200611
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200612 if (si->flags & SI_FL_WAIT_ROOM) {
Willy Tarreauf16723e2012-08-24 12:52:22 +0200613 __conn_data_stop_recv(conn);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100614 ic->rex = TICK_ETERNITY;
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200615 }
Willy Tarreauafc8a222014-11-28 15:46:27 +0100616 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ)) == CF_READ_PARTIAL &&
617 channel_may_recv(ic)) {
Willy Tarreau9f7c6a12012-11-19 16:43:14 +0100618 /* we must re-enable reading if si_chk_snd() has freed some space */
619 __conn_data_want_recv(conn);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100620 if (!(ic->flags & CF_READ_NOEXP) && tick_isset(ic->rex))
621 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200622 }
623
624 /* wake the task up only when needed */
625 if (/* changes on the production side */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100626 (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) ||
Willy Tarreaufd31e532012-07-23 18:24:25 +0200627 si->state != SI_ST_EST ||
628 (si->flags & SI_FL_ERR) ||
Willy Tarreauafc8a222014-11-28 15:46:27 +0100629 ((ic->flags & CF_READ_PARTIAL) &&
630 (!ic->to_forward || si_opposite(si)->state != SI_ST_EST)) ||
Willy Tarreaufd31e532012-07-23 18:24:25 +0200631
632 /* changes on the consumption side */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100633 (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) ||
634 ((oc->flags & CF_WRITE_ACTIVITY) &&
635 ((oc->flags & CF_SHUTW) ||
636 ((oc->flags & CF_WAKE_WRITE) &&
Willy Tarreau50fe03b2014-11-28 13:59:31 +0100637 (si_opposite(si)->state != SI_ST_EST ||
Willy Tarreauafc8a222014-11-28 15:46:27 +0100638 (channel_is_empty(oc) && !oc->to_forward)))))) {
Willy Tarreau07373b82014-11-28 12:08:47 +0100639 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200640 }
Willy Tarreauafc8a222014-11-28 15:46:27 +0100641 if (ic->flags & CF_READ_ACTIVITY)
642 ic->flags &= ~CF_READ_DONTWAIT;
Willy Tarreau10fc09e2014-11-25 19:46:36 +0100643
Willy Tarreau87b09662015-04-03 00:22:06 +0200644 stream_release_buffers(si_strm(si));
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200645 return 0;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200646}
Willy Tarreau2c6be842012-07-06 17:12:34 +0200647
Willy Tarreau5368d802012-08-21 18:22:06 +0200648/*
649 * This function is called to send buffer data to a stream socket.
Godbache68e02d2013-10-11 15:48:29 +0800650 * It calls the transport layer's snd_buf function. It relies on the
Godbach4f489902013-12-04 17:24:06 +0800651 * caller to commit polling changes. The caller should check conn->flags
652 * for errors.
Willy Tarreau5368d802012-08-21 18:22:06 +0200653 */
Godbach4f489902013-12-04 17:24:06 +0800654static void si_conn_send(struct connection *conn)
Willy Tarreau5368d802012-08-21 18:22:06 +0200655{
Willy Tarreaue603e692012-09-27 22:20:41 +0200656 struct stream_interface *si = conn->owner;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100657 struct channel *oc = si_oc(si);
Willy Tarreau5368d802012-08-21 18:22:06 +0200658 int ret;
659
Willy Tarreauafc8a222014-11-28 15:46:27 +0100660 if (oc->pipe && conn->xprt->snd_pipe) {
661 ret = conn->xprt->snd_pipe(conn, oc->pipe);
Willy Tarreau96199b12012-08-24 00:46:52 +0200662 if (ret > 0)
Willy Tarreauafc8a222014-11-28 15:46:27 +0100663 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Willy Tarreau5368d802012-08-21 18:22:06 +0200664
Willy Tarreauafc8a222014-11-28 15:46:27 +0100665 if (!oc->pipe->data) {
666 put_pipe(oc->pipe);
667 oc->pipe = NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200668 }
669
Willy Tarreau96199b12012-08-24 00:46:52 +0200670 if (conn->flags & CO_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +0800671 return;
Willy Tarreau5368d802012-08-21 18:22:06 +0200672 }
673
674 /* At this point, the pipe is empty, but we may still have data pending
675 * in the normal buffer.
676 */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100677 if (!oc->buf->o)
Godbach4f489902013-12-04 17:24:06 +0800678 return;
Willy Tarreau5368d802012-08-21 18:22:06 +0200679
Godbache68e02d2013-10-11 15:48:29 +0800680 /* when we're here, we already know that there is no spliced
Willy Tarreau5368d802012-08-21 18:22:06 +0200681 * data left, and that there are sendable buffered data.
682 */
Willy Tarreau310987a2014-01-22 19:46:33 +0100683 if (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_WR_SH | CO_FL_DATA_WR_SH | CO_FL_WAIT_DATA | CO_FL_HANDSHAKE))) {
Willy Tarreau5368d802012-08-21 18:22:06 +0200684 /* check if we want to inform the kernel that we're interested in
685 * sending more data after this call. We want this if :
686 * - we're about to close after this last send and want to merge
687 * the ongoing FIN with the last segment.
688 * - we know we can't send everything at once and must get back
689 * here because of unaligned data
690 * - there is still a finite amount of data to forward
691 * The test is arranged so that the most common case does only 2
692 * tests.
693 */
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100694 unsigned int send_flag = 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200695
Willy Tarreauafc8a222014-11-28 15:46:27 +0100696 if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) &&
697 ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) ||
698 (oc->flags & CF_EXPECT_MORE))) ||
699 ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW))
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100700 send_flag |= CO_SFL_MSG_MORE;
Willy Tarreau5368d802012-08-21 18:22:06 +0200701
Willy Tarreauafc8a222014-11-28 15:46:27 +0100702 if (oc->flags & CF_STREAMER)
Willy Tarreau7bed9452014-02-02 02:00:24 +0100703 send_flag |= CO_SFL_STREAMER;
704
Willy Tarreauafc8a222014-11-28 15:46:27 +0100705 ret = conn->xprt->snd_buf(conn, oc->buf, send_flag);
Godbache68e02d2013-10-11 15:48:29 +0800706 if (ret > 0) {
Willy Tarreauafc8a222014-11-28 15:46:27 +0100707 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Willy Tarreau5368d802012-08-21 18:22:06 +0200708
Willy Tarreauafc8a222014-11-28 15:46:27 +0100709 if (!oc->buf->o) {
Godbache68e02d2013-10-11 15:48:29 +0800710 /* Always clear both flags once everything has been sent, they're one-shot */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100711 oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT);
Godbache68e02d2013-10-11 15:48:29 +0800712 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200713
Godbache68e02d2013-10-11 15:48:29 +0800714 /* if some data remain in the buffer, it's only because the
715 * system buffers are full, we will try next time.
716 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200717 }
Godbache68e02d2013-10-11 15:48:29 +0800718 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200719}
720
721
Willy Tarreau100c4672012-08-20 12:06:26 +0200722/* Updates the timers and flags of a stream interface attached to a connection,
723 * depending on the buffers' flags. It should only be called once after the
724 * buffer flags have settled down, and before they are cleared. It doesn't
725 * harm to call it as often as desired (it just slightly hurts performance).
726 * It is only meant to be called by upper layers after buffer flags have been
727 * manipulated by analysers.
728 */
729void stream_int_update_conn(struct stream_interface *si)
730{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100731 struct channel *ic = si_ic(si);
732 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200733 struct connection *conn = __objt_conn(si->end);
Willy Tarreau100c4672012-08-20 12:06:26 +0200734
Willy Tarreau100c4672012-08-20 12:06:26 +0200735 /* Check if we need to close the read side */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100736 if (!(ic->flags & CF_SHUTR)) {
Willy Tarreau100c4672012-08-20 12:06:26 +0200737 /* Read not closed, update FD status and timeout for reads */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100738 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) {
Willy Tarreau100c4672012-08-20 12:06:26 +0200739 /* stop reading */
740 if (!(si->flags & SI_FL_WAIT_ROOM)) {
Willy Tarreauafc8a222014-11-28 15:46:27 +0100741 if (!(ic->flags & CF_DONT_READ)) /* full */
Willy Tarreau100c4672012-08-20 12:06:26 +0200742 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200743 conn_data_stop_recv(conn);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100744 ic->rex = TICK_ETERNITY;
Willy Tarreau100c4672012-08-20 12:06:26 +0200745 }
746 }
747 else {
748 /* (re)start reading and update timeout. Note: we don't recompute the timeout
749 * everytime we get here, otherwise it would risk never to expire. We only
750 * update it if is was not yet set. The stream socket handler will already
751 * have updated it if there has been a completed I/O.
752 */
753 si->flags &= ~SI_FL_WAIT_ROOM;
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200754 conn_data_want_recv(conn);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100755 if (!(ic->flags & (CF_READ_NOEXP|CF_DONT_READ)) && !tick_isset(ic->rex))
756 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreau100c4672012-08-20 12:06:26 +0200757 }
758 }
759
760 /* Check if we need to close the write side */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100761 if (!(oc->flags & CF_SHUTW)) {
Willy Tarreau100c4672012-08-20 12:06:26 +0200762 /* Write not closed, update FD status and timeout for writes */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100763 if (channel_is_empty(oc)) {
Willy Tarreau100c4672012-08-20 12:06:26 +0200764 /* stop writing */
765 if (!(si->flags & SI_FL_WAIT_DATA)) {
Willy Tarreauafc8a222014-11-28 15:46:27 +0100766 if ((oc->flags & CF_SHUTW_NOW) == 0)
Willy Tarreau100c4672012-08-20 12:06:26 +0200767 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200768 conn_data_stop_send(conn);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100769 oc->wex = TICK_ETERNITY;
Willy Tarreau100c4672012-08-20 12:06:26 +0200770 }
771 }
772 else {
773 /* (re)start writing and update timeout. Note: we don't recompute the timeout
774 * everytime we get here, otherwise it would risk never to expire. We only
775 * update it if is was not yet set. The stream socket handler will already
776 * have updated it if there has been a completed I/O.
777 */
778 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200779 conn_data_want_send(conn);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100780 if (!tick_isset(oc->wex)) {
781 oc->wex = tick_add_ifset(now_ms, oc->wto);
782 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
Willy Tarreau100c4672012-08-20 12:06:26 +0200783 /* Note: depending on the protocol, we don't know if we're waiting
784 * for incoming data or not. So in order to prevent the socket from
785 * expiring read timeouts during writes, we refresh the read timeout,
786 * except if it was already infinite or if we have explicitly setup
787 * independent streams.
788 */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100789 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreau100c4672012-08-20 12:06:26 +0200790 }
791 }
792 }
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200793 }
794}
795
796/*
797 * This function performs a shutdown-read on a stream interface attached to
798 * a connection in a connected or init state (it does nothing for other
799 * states). It either shuts the read side or marks itself as closed. The buffer
800 * flags are updated to reflect the new state. If the stream interface has
801 * SI_FL_NOHALF, we also forward the close to the write side. If a control
802 * layer is defined, then it is supposed to be a socket layer and file
Willy Tarreau6fe15412013-09-29 15:16:03 +0200803 * descriptors are then shutdown or closed accordingly. The function
804 * automatically disables polling if needed.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200805 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200806static void stream_int_shutr_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200807{
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200808 struct connection *conn = __objt_conn(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100809 struct channel *ic = si_ic(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200810
Willy Tarreauafc8a222014-11-28 15:46:27 +0100811 ic->flags &= ~CF_SHUTR_NOW;
812 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200813 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100814 ic->flags |= CF_SHUTR;
815 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200816 si->flags &= ~SI_FL_WAIT_ROOM;
817
818 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200819 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200820
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100821 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreau6fe15412013-09-29 15:16:03 +0200822 conn_full_close(conn);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200823 si->state = SI_ST_DIS;
824 si->exp = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200825 }
826 else if (si->flags & SI_FL_NOHALF) {
827 /* we want to immediately forward this close to the write side */
828 return stream_int_shutw_conn(si);
829 }
830 else if (conn->ctrl) {
831 /* we want the caller to disable polling on this FD */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200832 conn_data_stop_recv(conn);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200833 }
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200834}
835
836/*
837 * This function performs a shutdown-write on a stream interface attached to
838 * a connection in a connected or init state (it does nothing for other
839 * states). It either shuts the write side or marks itself as closed. The
840 * buffer flags are updated to reflect the new state. It does also close
841 * everything if the SI was marked as being in error state. If there is a
Willy Tarreau1398aa12015-03-12 23:04:07 +0100842 * data-layer shutdown, it is called.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200843 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200844static void stream_int_shutw_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200845{
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200846 struct connection *conn = __objt_conn(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100847 struct channel *ic = si_ic(si);
848 struct channel *oc = si_oc(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200849
Willy Tarreauafc8a222014-11-28 15:46:27 +0100850 oc->flags &= ~CF_SHUTW_NOW;
851 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200852 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100853 oc->flags |= CF_SHUTW;
854 oc->wex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200855 si->flags &= ~SI_FL_WAIT_DATA;
856
857 switch (si->state) {
858 case SI_ST_EST:
859 /* we have to shut before closing, otherwise some short messages
860 * may never leave the system, especially when there are remaining
861 * unread data in the socket input buffer, or when nolinger is set.
862 * However, if SI_FL_NOLINGER is explicitly set, we know there is
863 * no risk so we close both sides immediately.
864 */
865 if (si->flags & SI_FL_ERR) {
866 /* quick close, the socket is alredy shut anyway */
867 }
868 else if (si->flags & SI_FL_NOLINGER) {
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200869 /* unclean data-layer shutdown */
Willy Tarreau1398aa12015-03-12 23:04:07 +0100870 conn_data_shutw_hard(conn);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200871 }
872 else {
873 /* clean data-layer shutdown */
Willy Tarreau1398aa12015-03-12 23:04:07 +0100874 conn_data_shutw(conn);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200875
876 /* If the stream interface is configured to disable half-open
877 * connections, we'll skip the shutdown(), but only if the
878 * read size is already closed. Otherwise we can't support
879 * closed write with pending read (eg: abortonclose while
880 * waiting for the server).
881 */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100882 if (!(si->flags & SI_FL_NOHALF) || !(ic->flags & (CF_SHUTR|CF_DONT_READ))) {
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200883 /* We shutdown transport layer */
Willy Tarreau4dfd54f2015-03-12 22:44:53 +0100884 conn_sock_shutw(conn);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200885
Willy Tarreauafc8a222014-11-28 15:46:27 +0100886 if (!(ic->flags & (CF_SHUTR|CF_DONT_READ))) {
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200887 /* OK just a shutw, but we want the caller
888 * to disable polling on this FD if exists.
889 */
Willy Tarreau1398aa12015-03-12 23:04:07 +0100890 conn_cond_update_polling(conn);
Willy Tarreau6fe15412013-09-29 15:16:03 +0200891 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200892 }
893 }
894 }
895
896 /* fall through */
897 case SI_ST_CON:
898 /* we may have to close a pending connection, and mark the
899 * response buffer as shutr
900 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200901 conn_full_close(conn);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200902 /* fall through */
903 case SI_ST_CER:
904 case SI_ST_QUE:
905 case SI_ST_TAR:
906 si->state = SI_ST_DIS;
Willy Tarreau4a59f2f2013-10-24 20:10:45 +0200907 /* fall through */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200908 default:
909 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100910 ic->flags &= ~CF_SHUTR_NOW;
911 ic->flags |= CF_SHUTR;
912 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200913 si->exp = TICK_ETERNITY;
Willy Tarreau100c4672012-08-20 12:06:26 +0200914 }
915}
916
Willy Tarreau46a8d922012-08-20 12:38:36 +0200917/* This function is used for inter-stream-interface calls. It is called by the
918 * consumer to inform the producer side that it may be interested in checking
919 * for free space in the buffer. Note that it intentionally does not update
920 * timeouts, so that we can still check them later at wake-up. This function is
921 * dedicated to connection-based stream interfaces.
922 */
Willy Tarreauc5788912012-08-24 18:12:41 +0200923static void stream_int_chk_rcv_conn(struct stream_interface *si)
Willy Tarreau46a8d922012-08-20 12:38:36 +0200924{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100925 struct channel *ic = si_ic(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200926 struct connection *conn = __objt_conn(si->end);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200927
Willy Tarreauafc8a222014-11-28 15:46:27 +0100928 if (unlikely(si->state > SI_ST_EST || (ic->flags & CF_SHUTR)))
Willy Tarreau46a8d922012-08-20 12:38:36 +0200929 return;
930
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200931 conn_refresh_polling_flags(conn);
Willy Tarreau7d281492012-12-16 19:19:13 +0100932
Willy Tarreauafc8a222014-11-28 15:46:27 +0100933 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) {
Willy Tarreau46a8d922012-08-20 12:38:36 +0200934 /* stop reading */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100935 if (!(ic->flags & CF_DONT_READ)) /* full */
Willy Tarreau46a8d922012-08-20 12:38:36 +0200936 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200937 __conn_data_stop_recv(conn);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200938 }
939 else {
940 /* (re)start reading */
941 si->flags &= ~SI_FL_WAIT_ROOM;
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200942 __conn_data_want_recv(conn);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200943 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200944 conn_cond_update_data_polling(conn);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200945}
946
947
Willy Tarreaude5722c2012-08-20 15:01:10 +0200948/* This function is used for inter-stream-interface calls. It is called by the
949 * producer to inform the consumer side that it may be interested in checking
950 * for data in the buffer. Note that it intentionally does not update timeouts,
951 * so that we can still check them later at wake-up.
952 */
Willy Tarreauc5788912012-08-24 18:12:41 +0200953static void stream_int_chk_snd_conn(struct stream_interface *si)
Willy Tarreaude5722c2012-08-20 15:01:10 +0200954{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100955 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200956 struct connection *conn = __objt_conn(si->end);
Willy Tarreaude5722c2012-08-20 15:01:10 +0200957
Willy Tarreauafc8a222014-11-28 15:46:27 +0100958 if (unlikely(si->state > SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaude5722c2012-08-20 15:01:10 +0200959 return;
Willy Tarreaude5722c2012-08-20 15:01:10 +0200960
Willy Tarreauafc8a222014-11-28 15:46:27 +0100961 if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */
Willy Tarreaude5722c2012-08-20 15:01:10 +0200962 return;
963
Willy Tarreauafc8a222014-11-28 15:46:27 +0100964 if (!oc->pipe && /* spliced data wants to be forwarded ASAP */
Willy Tarreaub0165872012-12-15 10:12:39 +0100965 !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */
Willy Tarreaude5722c2012-08-20 15:01:10 +0200966 return;
967
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200968 if (conn->flags & (CO_FL_DATA_WR_ENA|CO_FL_CURR_WR_ENA)) {
Willy Tarreau5007d2a2013-07-18 22:09:48 +0200969 /* already subscribed to write notifications, will be called
970 * anyway, so let's avoid calling it especially if the reader
971 * is not ready.
972 */
973 return;
974 }
975
Willy Tarreau708e7172014-01-21 10:27:49 +0100976 /* Before calling the data-level operations, we have to prepare
977 * the polling flags to ensure we properly detect changes.
978 */
979 conn_refresh_polling_flags(conn);
980 __conn_data_want_send(conn);
Willy Tarreaud29a0662012-12-10 16:33:38 +0100981
Willy Tarreau708e7172014-01-21 10:27:49 +0100982 if (!(conn->flags & (CO_FL_HANDSHAKE|CO_FL_WAIT_L4_CONN|CO_FL_WAIT_L6_CONN))) {
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200983 si_conn_send(conn);
Willy Tarreau798c3c92014-01-21 10:30:08 +0100984 if (conn->flags & CO_FL_ERROR) {
Willy Tarreaud29a0662012-12-10 16:33:38 +0100985 /* Write error on the file descriptor */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200986 __conn_data_stop_both(conn);
Willy Tarreaud29a0662012-12-10 16:33:38 +0100987 si->flags |= SI_FL_ERR;
Willy Tarreaud29a0662012-12-10 16:33:38 +0100988 goto out_wakeup;
989 }
Willy Tarreaude5722c2012-08-20 15:01:10 +0200990 }
991
992 /* OK, so now we know that some data might have been sent, and that we may
993 * have to poll first. We have to do that too if the buffer is not empty.
994 */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100995 if (channel_is_empty(oc)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +0200996 /* the connection is established but we can't write. Either the
997 * buffer is empty, or we just refrain from sending because the
998 * ->o limit was reached. Maybe we just wrote the last
999 * chunk and need to close.
1000 */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001001 __conn_data_stop_send(conn);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001002 if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) ==
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001003 (CF_AUTO_CLOSE|CF_SHUTW_NOW)) &&
Willy Tarreaude5722c2012-08-20 15:01:10 +02001004 (si->state == SI_ST_EST)) {
1005 si_shutw(si);
1006 goto out_wakeup;
1007 }
1008
Willy Tarreauafc8a222014-11-28 15:46:27 +01001009 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001010 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001011 oc->wex = TICK_ETERNITY;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001012 }
1013 else {
1014 /* Otherwise there are remaining data to be sent in the buffer,
1015 * which means we have to poll before doing so.
1016 */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001017 __conn_data_want_send(conn);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001018 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001019 if (!tick_isset(oc->wex))
1020 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001021 }
1022
Willy Tarreauafc8a222014-11-28 15:46:27 +01001023 if (likely(oc->flags & CF_WRITE_ACTIVITY)) {
1024 struct channel *ic = si_ic(si);
1025
Willy Tarreaude5722c2012-08-20 15:01:10 +02001026 /* update timeout if we have written something */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001027 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
1028 !channel_is_empty(oc))
1029 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001030
Willy Tarreauafc8a222014-11-28 15:46:27 +01001031 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001032 /* Note: to prevent the client from expiring read timeouts
1033 * during writes, we refresh it. We only do this if the
1034 * interface is not configured for "independent streams",
1035 * because for some applications it's better not to do this,
1036 * for instance when continuously exchanging small amounts
1037 * of data which can full the socket buffers long before a
1038 * write timeout is detected.
1039 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001040 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001041 }
1042 }
1043
1044 /* in case of special condition (error, shutdown, end of write...), we
1045 * have to notify the task.
1046 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001047 if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) ||
1048 ((oc->flags & CF_WAKE_WRITE) &&
1049 ((channel_is_empty(oc) && !oc->to_forward) ||
Willy Tarreaue6300be2014-01-25 02:33:21 +01001050 si->state != SI_ST_EST)))) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001051 out_wakeup:
Willy Tarreau07373b82014-11-28 12:08:47 +01001052 if (!(si->flags & SI_FL_DONT_WAKE))
1053 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001054 }
Willy Tarreauf16723e2012-08-24 12:52:22 +02001055
1056 /* commit possible polling changes */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001057 conn_cond_update_polling(conn);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001058}
1059
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001060/*
Willy Tarreauce323de2012-08-20 21:41:06 +02001061 * This is the callback which is called by the connection layer to receive data
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001062 * into the buffer from the connection. It iterates over the transport layer's
1063 * rcv_buf function.
Willy Tarreauce323de2012-08-20 21:41:06 +02001064 */
Willy Tarreau4aa36832012-10-02 20:07:22 +02001065static void si_conn_recv_cb(struct connection *conn)
Willy Tarreauce323de2012-08-20 21:41:06 +02001066{
Willy Tarreaue603e692012-09-27 22:20:41 +02001067 struct stream_interface *si = conn->owner;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001068 struct channel *ic = si_ic(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001069 int ret, max, cur_read;
1070 int read_poll = MAX_READ_POLL_LOOPS;
1071
1072 /* stop immediately on errors. Note that we DON'T want to stop on
1073 * POLL_ERR, as the poller might report a write error while there
1074 * are still data available in the recv buffer. This typically
1075 * happens when we send too large a request to a backend server
1076 * which rejects it before reading it all.
1077 */
1078 if (conn->flags & CO_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +08001079 return;
Willy Tarreauce323de2012-08-20 21:41:06 +02001080
1081 /* stop here if we reached the end of data */
1082 if (conn_data_read0_pending(conn))
1083 goto out_shutdown_r;
1084
1085 /* maybe we were called immediately after an asynchronous shutr */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001086 if (ic->flags & CF_SHUTR)
Willy Tarreauce323de2012-08-20 21:41:06 +02001087 return;
1088
Willy Tarreau96199b12012-08-24 00:46:52 +02001089 cur_read = 0;
Willy Tarreau96199b12012-08-24 00:46:52 +02001090
Willy Tarreauafc8a222014-11-28 15:46:27 +01001091 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !ic->buf->o &&
Willy Tarreau7e312732014-02-12 16:35:14 +01001092 global.tune.idle_timer &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001093 (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001094 /* The buffer was empty and nothing was transferred for more
1095 * than one second. This was caused by a pause and not by
1096 * congestion. Reset any streaming mode to reduce latency.
1097 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001098 ic->xfer_small = 0;
1099 ic->xfer_large = 0;
1100 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001101 }
1102
Willy Tarreau96199b12012-08-24 00:46:52 +02001103 /* First, let's see if we may splice data across the channel without
1104 * using a buffer.
1105 */
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001106 if (conn->xprt->rcv_pipe &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001107 (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) &&
1108 ic->flags & CF_KERN_SPLICING) {
1109 if (buffer_not_empty(ic->buf)) {
Willy Tarreau96199b12012-08-24 00:46:52 +02001110 /* We're embarrassed, there are already data pending in
1111 * the buffer and we don't want to have them at two
1112 * locations at a time. Let's indicate we need some
1113 * place and ask the consumer to hurry.
1114 */
1115 goto abort_splice;
1116 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001117
Willy Tarreauafc8a222014-11-28 15:46:27 +01001118 if (unlikely(ic->pipe == NULL)) {
1119 if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) {
1120 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001121 goto abort_splice;
1122 }
1123 }
1124
Willy Tarreauafc8a222014-11-28 15:46:27 +01001125 ret = conn->xprt->rcv_pipe(conn, ic->pipe, ic->to_forward);
Willy Tarreau96199b12012-08-24 00:46:52 +02001126 if (ret < 0) {
1127 /* splice not supported on this end, let's disable it */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001128 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001129 goto abort_splice;
1130 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001131
Willy Tarreau96199b12012-08-24 00:46:52 +02001132 if (ret > 0) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001133 if (ic->to_forward != CHN_INFINITE_FORWARD)
1134 ic->to_forward -= ret;
1135 ic->total += ret;
Willy Tarreau96199b12012-08-24 00:46:52 +02001136 cur_read += ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001137 ic->flags |= CF_READ_PARTIAL;
Willy Tarreauce323de2012-08-20 21:41:06 +02001138 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001139
1140 if (conn_data_read0_pending(conn))
1141 goto out_shutdown_r;
1142
1143 if (conn->flags & CO_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +08001144 return;
Willy Tarreau96199b12012-08-24 00:46:52 +02001145
Willy Tarreau61d39a02013-07-18 21:49:32 +02001146 if (conn->flags & CO_FL_WAIT_ROOM) {
1147 /* the pipe is full or we have read enough data that it
1148 * could soon be full. Let's stop before needing to poll.
1149 */
Willy Tarreau56a77e52012-09-02 18:34:44 +02001150 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreau61d39a02013-07-18 21:49:32 +02001151 __conn_data_stop_recv(conn);
1152 }
Willy Tarreau56a77e52012-09-02 18:34:44 +02001153
Willy Tarreauce323de2012-08-20 21:41:06 +02001154 /* splice not possible (anymore), let's go on on standard copy */
1155 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001156
1157 abort_splice:
Willy Tarreauafc8a222014-11-28 15:46:27 +01001158 if (ic->pipe && unlikely(!ic->pipe->data)) {
1159 put_pipe(ic->pipe);
1160 ic->pipe = NULL;
Willy Tarreau96199b12012-08-24 00:46:52 +02001161 }
1162
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001163 /* now we'll need a buffer */
Willy Tarreau87b09662015-04-03 00:22:06 +02001164 if (!stream_alloc_recv_buffer(ic)) {
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001165 si->flags |= SI_FL_WAIT_ROOM;
1166 goto end_recv;
1167 }
1168
Willy Tarreau61d39a02013-07-18 21:49:32 +02001169 /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling
1170 * was enabled, which implies that the recv buffer was not full. So we have a guarantee
1171 * that if such an event is not handled above in splice, it will be handled here by
1172 * recv().
1173 */
Willy Tarreau310987a2014-01-22 19:46:33 +01001174 while (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_DATA_RD_SH | CO_FL_WAIT_ROOM | CO_FL_HANDSHAKE))) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001175 max = channel_recv_max(ic);
Willy Tarreauce323de2012-08-20 21:41:06 +02001176
1177 if (!max) {
Willy Tarreau56a77e52012-09-02 18:34:44 +02001178 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreauce323de2012-08-20 21:41:06 +02001179 break;
1180 }
1181
Willy Tarreauafc8a222014-11-28 15:46:27 +01001182 ret = conn->xprt->rcv_buf(conn, ic->buf, max);
Willy Tarreauce323de2012-08-20 21:41:06 +02001183 if (ret <= 0)
1184 break;
1185
1186 cur_read += ret;
1187
1188 /* if we're allowed to directly forward data, we must update ->o */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001189 if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001190 unsigned long fwd = ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001191 if (ic->to_forward != CHN_INFINITE_FORWARD) {
1192 if (fwd > ic->to_forward)
1193 fwd = ic->to_forward;
1194 ic->to_forward -= fwd;
Willy Tarreauce323de2012-08-20 21:41:06 +02001195 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001196 b_adv(ic->buf, fwd);
Willy Tarreauce323de2012-08-20 21:41:06 +02001197 }
1198
Willy Tarreauafc8a222014-11-28 15:46:27 +01001199 ic->flags |= CF_READ_PARTIAL;
1200 ic->total += ret;
Willy Tarreauce323de2012-08-20 21:41:06 +02001201
Willy Tarreauafc8a222014-11-28 15:46:27 +01001202 if (!channel_may_recv(ic)) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001203 si->flags |= SI_FL_WAIT_ROOM;
1204 break;
1205 }
1206
Willy Tarreauafc8a222014-11-28 15:46:27 +01001207 if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0) {
Willy Tarreau34ac5662012-12-19 18:01:02 +01001208 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreaud486ef52012-12-10 17:03:52 +01001209 __conn_data_stop_recv(conn);
Willy Tarreauce323de2012-08-20 21:41:06 +02001210 break;
Willy Tarreau5fddab02012-11-09 18:27:26 +01001211 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001212
1213 /* if too many bytes were missing from last read, it means that
1214 * it's pointless trying to read again because the system does
1215 * not have them in buffers.
1216 */
1217 if (ret < max) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001218 /* if a streamer has read few data, it may be because we
1219 * have exhausted system buffers. It's not worth trying
1220 * again.
1221 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001222 if (ic->flags & CF_STREAMER)
Willy Tarreauce323de2012-08-20 21:41:06 +02001223 break;
1224
1225 /* if we read a large block smaller than what we requested,
1226 * it's almost certain we'll never get anything more.
1227 */
1228 if (ret >= global.tune.recv_enough)
1229 break;
1230 }
1231 } /* while !flags */
1232
Willy Tarreauc5890e62014-02-09 17:47:01 +01001233 if (cur_read) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001234 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) &&
1235 (cur_read <= ic->buf->size / 2)) {
1236 ic->xfer_large = 0;
1237 ic->xfer_small++;
1238 if (ic->xfer_small >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001239 /* we have read less than half of the buffer in
1240 * one pass, and this happened at least 3 times.
1241 * This is definitely not a streamer.
1242 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001243 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001244 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001245 else if (ic->xfer_small >= 2) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001246 /* if the buffer has been at least half full twice,
1247 * we receive faster than we send, so at least it
1248 * is not a "fast streamer".
1249 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001250 ic->flags &= ~CF_STREAMER_FAST;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001251 }
1252 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001253 else if (!(ic->flags & CF_STREAMER_FAST) &&
1254 (cur_read >= ic->buf->size - global.tune.maxrewrite)) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001255 /* we read a full buffer at once */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001256 ic->xfer_small = 0;
1257 ic->xfer_large++;
1258 if (ic->xfer_large >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001259 /* we call this buffer a fast streamer if it manages
1260 * to be filled in one call 3 consecutive times.
1261 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001262 ic->flags |= (CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001263 }
1264 }
1265 else {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001266 ic->xfer_small = 0;
1267 ic->xfer_large = 0;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001268 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001269 ic->last_read = now_ms;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001270 }
1271
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001272 end_recv:
1273 if (conn->flags & CO_FL_ERROR)
1274 return;
1275
Willy Tarreauce323de2012-08-20 21:41:06 +02001276 if (conn_data_read0_pending(conn))
1277 /* connection closed */
1278 goto out_shutdown_r;
1279
1280 return;
1281
1282 out_shutdown_r:
1283 /* we received a shutdown */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001284 ic->flags |= CF_READ_NULL;
1285 if (ic->flags & CF_AUTO_CLOSE)
1286 channel_shutw_now(ic);
Willy Tarreauce323de2012-08-20 21:41:06 +02001287 stream_sock_read0(si);
1288 conn_data_read0(conn);
1289 return;
Willy Tarreauce323de2012-08-20 21:41:06 +02001290}
1291
1292/*
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001293 * This is the callback which is called by the connection layer to send data
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001294 * from the buffer to the connection. It iterates over the transport layer's
1295 * snd_buf function.
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001296 */
Willy Tarreau4aa36832012-10-02 20:07:22 +02001297static void si_conn_send_cb(struct connection *conn)
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001298{
Willy Tarreaue603e692012-09-27 22:20:41 +02001299 struct stream_interface *si = conn->owner;
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001300
1301 if (conn->flags & CO_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +08001302 return;
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001303
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001304 if (conn->flags & CO_FL_HANDSHAKE)
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001305 /* a handshake was requested */
1306 return;
1307
1308 /* we might have been called just after an asynchronous shutw */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001309 if (si_oc(si)->flags & CF_SHUTW)
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001310 return;
1311
1312 /* OK there are data waiting to be sent */
Godbach4f489902013-12-04 17:24:06 +08001313 si_conn_send(conn);
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001314
1315 /* OK all done */
1316 return;
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001317}
1318
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001319/*
1320 * This function propagates a null read received on a socket-based connection.
1321 * It updates the stream interface. If the stream interface has SI_FL_NOHALF,
Willy Tarreau11405122015-03-12 22:32:27 +01001322 * the close is also forwarded to the write side as an abort.
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001323 */
1324void stream_sock_read0(struct stream_interface *si)
1325{
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001326 struct connection *conn = __objt_conn(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001327 struct channel *ic = si_ic(si);
1328 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001329
Willy Tarreauafc8a222014-11-28 15:46:27 +01001330 ic->flags &= ~CF_SHUTR_NOW;
1331 if (ic->flags & CF_SHUTR)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001332 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001333 ic->flags |= CF_SHUTR;
1334 ic->rex = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001335 si->flags &= ~SI_FL_WAIT_ROOM;
1336
1337 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1338 return;
1339
Willy Tarreauafc8a222014-11-28 15:46:27 +01001340 if (oc->flags & CF_SHUTW)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001341 goto do_close;
1342
1343 if (si->flags & SI_FL_NOHALF) {
1344 /* we want to immediately forward this close to the write side */
Willy Tarreau87b09662015-04-03 00:22:06 +02001345 /* force flag on ssl to keep stream in cache */
Willy Tarreau1398aa12015-03-12 23:04:07 +01001346 conn_data_shutw_hard(conn);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001347 goto do_close;
1348 }
1349
1350 /* otherwise that's just a normal read shutdown */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001351 __conn_data_stop_recv(conn);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001352 return;
1353
1354 do_close:
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001355 /* OK we completely close the socket here just as if we went through si_shut[rw]() */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001356 conn_full_close(conn);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001357
Willy Tarreauafc8a222014-11-28 15:46:27 +01001358 ic->flags &= ~CF_SHUTR_NOW;
1359 ic->flags |= CF_SHUTR;
1360 ic->rex = TICK_ETERNITY;
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001361
Willy Tarreauafc8a222014-11-28 15:46:27 +01001362 oc->flags &= ~CF_SHUTW_NOW;
1363 oc->flags |= CF_SHUTW;
1364 oc->wex = TICK_ETERNITY;
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001365
1366 si->flags &= ~(SI_FL_WAIT_DATA | SI_FL_WAIT_ROOM);
1367
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001368 si->state = SI_ST_DIS;
1369 si->exp = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001370 return;
1371}
1372
Willy Tarreaue5f86492015-04-19 15:16:35 +02001373/* notifies the stream interface that the applet has completed its work */
1374void si_applet_done(struct stream_interface *si)
1375{
1376 struct channel *ic = si_ic(si);
1377 struct channel *oc = si_oc(si);
1378
1379 /* process consumer side */
1380 if (channel_is_empty(oc)) {
1381 if (((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) &&
1382 (si->state == SI_ST_EST))
1383 stream_int_shutw_applet(si);
1384 oc->wex = TICK_ETERNITY;
1385 }
1386
1387 /* indicate that we may be waiting for data from the output channel */
1388 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0 && channel_may_recv(oc))
1389 si->flags |= SI_FL_WAIT_DATA;
1390
1391 /* update OC timeouts and wake the other side up if it's waiting for room */
1392 if (oc->flags & CF_WRITE_ACTIVITY) {
1393 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
1394 !channel_is_empty(oc))
1395 if (tick_isset(oc->wex))
1396 oc->wex = tick_add_ifset(now_ms, oc->wto);
1397
1398 if (!(si->flags & SI_FL_INDEP_STR))
1399 if (tick_isset(ic->rex))
1400 ic->rex = tick_add_ifset(now_ms, ic->rto);
1401
1402 if (likely((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL|CF_DONT_READ)) == CF_WRITE_PARTIAL &&
1403 channel_may_recv(oc) &&
1404 (si_opposite(si)->flags & SI_FL_WAIT_ROOM)))
1405 si_chk_rcv(si_opposite(si));
1406 }
1407
1408 /* Notify the other side when we've injected data into the IC that
1409 * needs to be forwarded. We can do fast-forwarding as soon as there
1410 * are output data, but we avoid doing this for partial buffers,
1411 * because it is very likely that it will be done again immediately
1412 * afterwards once the following data are parsed (eg: HTTP chunking).
1413 * We only remove SI_FL_WAIT_ROOM once we've emptied the whole output
1414 * buffer, because applets are often forced to stop before the buffer
1415 * is full. We must not stop based on input data alone because an HTTP
1416 * parser might need more data to complete the parsing.
1417 */
1418 if (!channel_is_empty(ic) &&
1419 (si_opposite(si)->flags & SI_FL_WAIT_DATA) &&
1420 (si_ib(si)->i == 0 || ic->pipe)) {
1421 si_chk_snd(si_opposite(si));
1422 if (channel_is_empty(ic))
1423 si->flags &= ~SI_FL_WAIT_ROOM;
1424 }
1425
1426 if (si->flags & SI_FL_WAIT_ROOM) {
1427 ic->rex = TICK_ETERNITY;
1428 }
1429 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ)) == CF_READ_PARTIAL &&
1430 channel_may_recv(ic)) {
1431 /* we must re-enable reading if si_chk_snd() has freed some space */
1432 if (!(ic->flags & CF_READ_NOEXP) && tick_isset(ic->rex))
1433 ic->rex = tick_add_ifset(now_ms, ic->rto);
1434 }
1435
Willy Tarreaufe127932015-04-21 19:23:39 +02001436 /* get away from the active list if we can't work anymore. */
1437 if (((si->flags & (SI_FL_WANT_PUT|SI_FL_WAIT_ROOM)) != SI_FL_WANT_PUT) &&
1438 ((si->flags & (SI_FL_WANT_GET|SI_FL_WAIT_DATA)) != SI_FL_WANT_GET))
Willy Tarreaue5f86492015-04-19 15:16:35 +02001439 appctx_pause(si_appctx(si));
1440
1441 /* wake the task up only when needed */
1442 if (/* changes on the production side */
1443 (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) ||
1444 si->state != SI_ST_EST ||
1445 (si->flags & SI_FL_ERR) ||
1446 ((ic->flags & CF_READ_PARTIAL) &&
1447 (!ic->to_forward || si_opposite(si)->state != SI_ST_EST)) ||
1448
1449 /* changes on the consumption side */
1450 (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) ||
1451 ((oc->flags & CF_WRITE_ACTIVITY) &&
1452 ((oc->flags & CF_SHUTW) ||
1453 ((oc->flags & CF_WAKE_WRITE) &&
1454 (si_opposite(si)->state != SI_ST_EST ||
1455 (channel_is_empty(oc) && !oc->to_forward)))))) {
1456 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreau0b1a4542015-04-23 11:50:43 +02001457 appctx_pause(si_appctx(si));
Willy Tarreaue5f86492015-04-19 15:16:35 +02001458 }
1459 if (ic->flags & CF_READ_ACTIVITY)
1460 ic->flags &= ~CF_READ_DONTWAIT;
1461
1462 stream_release_buffers(si_strm(si));
1463}
1464
Willy Tarreau563cc372015-04-19 18:13:56 +02001465/* updates the timers and flags of a stream interface attached to an applet.
1466 * it's called from the upper layers after the buffers/channels have been
1467 * updated.
1468 */
1469void stream_int_update_applet(struct stream_interface *si)
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001470{
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001471 struct channel *ic = si_ic(si);
1472 struct channel *oc = si_oc(si);
1473
Willy Tarreau563cc372015-04-19 18:13:56 +02001474 /* Check if we need to close the read side */
1475 if (!(ic->flags & CF_SHUTR)) {
1476 /* Read not closed, update FD status and timeout for reads */
1477 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) {
1478 /* stop reading */
1479 if (!(si->flags & SI_FL_WAIT_ROOM)) {
1480 if (!(ic->flags & CF_DONT_READ)) /* full */
1481 si->flags |= SI_FL_WAIT_ROOM;
1482 ic->rex = TICK_ETERNITY;
1483 }
1484 }
1485 else {
1486 /* (re)start reading and update timeout. Note: we don't recompute the timeout
1487 * everytime we get here, otherwise it would risk never to expire. We only
1488 * update it if is was not yet set. The stream socket handler will already
1489 * have updated it if there has been a completed I/O.
1490 */
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001491 si->flags &= ~SI_FL_WAIT_ROOM;
Willy Tarreau563cc372015-04-19 18:13:56 +02001492 if (!(ic->flags & (CF_READ_NOEXP|CF_DONT_READ)) && !tick_isset(ic->rex))
1493 ic->rex = tick_add_ifset(now_ms, ic->rto);
1494 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001495 }
1496
Willy Tarreau563cc372015-04-19 18:13:56 +02001497 /* Check if we need to close the write side */
1498 if (!(oc->flags & CF_SHUTW)) {
1499 /* Write not closed, update FD status and timeout for writes */
1500 if (channel_is_empty(oc)) {
1501 /* stop writing */
1502 if (!(si->flags & SI_FL_WAIT_DATA)) {
1503 if ((oc->flags & CF_SHUTW_NOW) == 0)
1504 si->flags |= SI_FL_WAIT_DATA;
1505 oc->wex = TICK_ETERNITY;
1506 }
1507 }
1508 else {
1509 /* (re)start writing and update timeout. Note: we don't recompute the timeout
1510 * everytime we get here, otherwise it would risk never to expire. We only
1511 * update it if is was not yet set. The stream socket handler will already
1512 * have updated it if there has been a completed I/O.
1513 */
1514 si->flags &= ~SI_FL_WAIT_DATA;
1515 if (!tick_isset(oc->wex)) {
1516 oc->wex = tick_add_ifset(now_ms, oc->wto);
1517 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
1518 /* Note: depending on the protocol, we don't know if we're waiting
1519 * for incoming data or not. So in order to prevent the socket from
1520 * expiring read timeouts during writes, we refresh the read timeout,
1521 * except if it was already infinite or if we have explicitly setup
1522 * independent streams.
1523 */
1524 ic->rex = tick_add_ifset(now_ms, ic->rto);
1525 }
1526 }
1527 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001528 }
Willy Tarreau563cc372015-04-19 18:13:56 +02001529
Willy Tarreaufe127932015-04-21 19:23:39 +02001530 if (((si->flags & (SI_FL_WANT_PUT|SI_FL_WAIT_ROOM)) == SI_FL_WANT_PUT) ||
1531 ((si->flags & (SI_FL_WANT_GET|SI_FL_WAIT_DATA)) == SI_FL_WANT_GET))
Willy Tarreau563cc372015-04-19 18:13:56 +02001532 appctx_wakeup(si_appctx(si));
Willy Tarreaufe127932015-04-21 19:23:39 +02001533 else
1534 appctx_pause(si_appctx(si));
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001535}
1536
1537/*
1538 * This function performs a shutdown-read on a stream interface attached to an
1539 * applet in a connected or init state (it does nothing for other states). It
1540 * either shuts the read side or marks itself as closed. The buffer flags are
1541 * updated to reflect the new state. If the stream interface has SI_FL_NOHALF,
1542 * we also forward the close to the write side. The owner task is woken up if
1543 * it exists.
1544 */
1545static void stream_int_shutr_applet(struct stream_interface *si)
1546{
1547 struct channel *ic = si_ic(si);
1548
1549 ic->flags &= ~CF_SHUTR_NOW;
1550 if (ic->flags & CF_SHUTR)
1551 return;
1552 ic->flags |= CF_SHUTR;
1553 ic->rex = TICK_ETERNITY;
1554 si->flags &= ~SI_FL_WAIT_ROOM;
1555
Willy Tarreau828824a2015-04-19 17:20:03 +02001556 /* Note: on shutr, we don't call the applet */
1557
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001558 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1559 return;
1560
1561 if (si_oc(si)->flags & CF_SHUTW) {
1562 si->state = SI_ST_DIS;
1563 si->exp = TICK_ETERNITY;
1564 si_applet_release(si);
1565 }
1566 else if (si->flags & SI_FL_NOHALF) {
1567 /* we want to immediately forward this close to the write side */
1568 return stream_int_shutw_applet(si);
1569 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001570}
1571
1572/*
1573 * This function performs a shutdown-write on a stream interface attached to an
1574 * applet in a connected or init state (it does nothing for other states). It
1575 * either shuts the write side or marks itself as closed. The buffer flags are
1576 * updated to reflect the new state. It does also close everything if the SI
1577 * was marked as being in error state. The owner task is woken up if it exists.
1578 */
1579static void stream_int_shutw_applet(struct stream_interface *si)
1580{
1581 struct channel *ic = si_ic(si);
1582 struct channel *oc = si_oc(si);
1583
1584 oc->flags &= ~CF_SHUTW_NOW;
1585 if (oc->flags & CF_SHUTW)
1586 return;
1587 oc->flags |= CF_SHUTW;
1588 oc->wex = TICK_ETERNITY;
1589 si->flags &= ~SI_FL_WAIT_DATA;
1590
Willy Tarreau828824a2015-04-19 17:20:03 +02001591 /* on shutw we always wake the applet up */
1592 appctx_wakeup(si_appctx(si));
1593
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001594 switch (si->state) {
1595 case SI_ST_EST:
1596 /* we have to shut before closing, otherwise some short messages
1597 * may never leave the system, especially when there are remaining
1598 * unread data in the socket input buffer, or when nolinger is set.
1599 * However, if SI_FL_NOLINGER is explicitly set, we know there is
1600 * no risk so we close both sides immediately.
1601 */
1602 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
1603 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
1604 return;
1605
1606 /* fall through */
1607 case SI_ST_CON:
1608 case SI_ST_CER:
1609 case SI_ST_QUE:
1610 case SI_ST_TAR:
1611 /* Note that none of these states may happen with applets */
1612 si->state = SI_ST_DIS;
1613 si_applet_release(si);
1614 default:
1615 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
1616 ic->flags &= ~CF_SHUTR_NOW;
1617 ic->flags |= CF_SHUTR;
1618 ic->rex = TICK_ETERNITY;
1619 si->exp = TICK_ETERNITY;
1620 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001621}
1622
1623/* chk_rcv function for applets */
1624static void stream_int_chk_rcv_applet(struct stream_interface *si)
1625{
1626 struct channel *ic = si_ic(si);
1627
1628 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1629 __FUNCTION__,
1630 si, si->state, ic->flags, si_oc(si)->flags);
1631
1632 if (unlikely(si->state != SI_ST_EST || (ic->flags & (CF_SHUTR|CF_DONT_READ))))
1633 return;
Willy Tarreau828824a2015-04-19 17:20:03 +02001634 /* here we only wake the applet up if it was waiting for some room */
1635 if (!(si->flags & SI_FL_WAIT_ROOM))
1636 return;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001637
Willy Tarreau828824a2015-04-19 17:20:03 +02001638 if (channel_may_recv(ic) && !ic->pipe) {
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001639 /* (re)start reading */
Willy Tarreau828824a2015-04-19 17:20:03 +02001640 appctx_wakeup(si_appctx(si));
1641 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001642}
1643
1644/* chk_snd function for applets */
1645static void stream_int_chk_snd_applet(struct stream_interface *si)
1646{
1647 struct channel *oc = si_oc(si);
1648
1649 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1650 __FUNCTION__,
1651 si, si->state, si_ic(si)->flags, oc->flags);
1652
1653 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
1654 return;
1655
Willy Tarreau828824a2015-04-19 17:20:03 +02001656 /* we only wake the applet up if it was waiting for some data */
1657
1658 if (!(si->flags & SI_FL_WAIT_DATA))
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001659 return;
1660
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001661 if (!tick_isset(oc->wex))
1662 oc->wex = tick_add_ifset(now_ms, oc->wto);
1663
Willy Tarreau828824a2015-04-19 17:20:03 +02001664 if (!channel_is_empty(oc)) {
1665 /* (re)start sending */
1666 appctx_wakeup(si_appctx(si));
1667 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001668}
1669
Willy Tarreaudded32d2008-11-30 19:48:07 +01001670/*
Willy Tarreaucff64112008-11-03 06:26:53 +01001671 * Local variables:
1672 * c-indent-level: 8
1673 * c-basic-offset: 8
1674 * End:
1675 */