Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Functions managing stream_interface structures |
| 3 | * |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 4 | * Copyright 2000-2012 Willy Tarreau <w@1wt.eu> |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 5 | * |
| 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 Tarreau | bf883e0 | 2014-11-25 21:10:35 +0100 | [diff] [blame] | 22 | #include <common/buffer.h> |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 23 | #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 Tarreau | 8a8d83b | 2015-04-13 13:24:54 +0200 | [diff] [blame] | 30 | #include <proto/applet.h> |
Willy Tarreau | c7e4238 | 2012-08-24 19:22:53 +0200 | [diff] [blame] | 31 | #include <proto/channel.h> |
Willy Tarreau | 8b11708 | 2012-08-06 15:06:49 +0200 | [diff] [blame] | 32 | #include <proto/connection.h> |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 33 | #include <proto/mux_pt.h> |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 34 | #include <proto/pipe.h> |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 35 | #include <proto/stream.h> |
Willy Tarreau | 269358d | 2009-09-20 20:14:49 +0200 | [diff] [blame] | 36 | #include <proto/stream_interface.h> |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 37 | #include <proto/task.h> |
| 38 | |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 39 | #include <types/pipe.h> |
| 40 | |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 41 | /* functions used by default on a detached stream-interface */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 42 | static void stream_int_shutr(struct stream_interface *si); |
| 43 | static void stream_int_shutw(struct stream_interface *si); |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 44 | static void stream_int_chk_rcv(struct stream_interface *si); |
| 45 | static void stream_int_chk_snd(struct stream_interface *si); |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 46 | |
| 47 | /* functions used on a conn_stream-based stream-interface */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 48 | static void stream_int_shutr_conn(struct stream_interface *si); |
| 49 | static void stream_int_shutw_conn(struct stream_interface *si); |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 50 | static void stream_int_chk_rcv_conn(struct stream_interface *si); |
| 51 | static void stream_int_chk_snd_conn(struct stream_interface *si); |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 52 | |
| 53 | /* functions used on an applet-based stream-interface */ |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 54 | static void stream_int_shutr_applet(struct stream_interface *si); |
| 55 | static void stream_int_shutw_applet(struct stream_interface *si); |
| 56 | static void stream_int_chk_rcv_applet(struct stream_interface *si); |
| 57 | static void stream_int_chk_snd_applet(struct stream_interface *si); |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 58 | |
| 59 | /* last read notification */ |
| 60 | static void stream_int_read0(struct stream_interface *si); |
| 61 | |
| 62 | /* post-IO notification callback */ |
| 63 | static void stream_int_notify(struct stream_interface *si); |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 64 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 65 | /* stream-interface operations for embedded tasks */ |
| 66 | struct si_ops si_embedded_ops = { |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 67 | .chk_rcv = stream_int_chk_rcv, |
| 68 | .chk_snd = stream_int_chk_snd, |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 69 | .shutr = stream_int_shutr, |
| 70 | .shutw = stream_int_shutw, |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 71 | }; |
| 72 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 73 | /* stream-interface operations for connections */ |
| 74 | struct si_ops si_conn_ops = { |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 75 | .chk_rcv = stream_int_chk_rcv_conn, |
| 76 | .chk_snd = stream_int_chk_snd_conn, |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 77 | .shutr = stream_int_shutr_conn, |
| 78 | .shutw = stream_int_shutw_conn, |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 79 | }; |
| 80 | |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 81 | /* stream-interface operations for connections */ |
| 82 | struct si_ops si_applet_ops = { |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 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 Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 89 | |
| 90 | /* Functions used to communicate with a conn_stream. The first two may be used |
| 91 | * directly, the last one is mostly a wake callback. |
| 92 | */ |
| 93 | int si_cs_recv(struct conn_stream *cs); |
| 94 | int si_cs_send(struct conn_stream *cs); |
| 95 | static int si_cs_process(struct conn_stream *cs); |
| 96 | |
| 97 | |
Willy Tarreau | 74beec3 | 2012-10-03 00:41:04 +0200 | [diff] [blame] | 98 | struct data_cb si_conn_cb = { |
Olivier Houchard | 21df6cc | 2018-09-14 23:21:44 +0200 | [diff] [blame] | 99 | .wake = si_cs_process, |
Willy Tarreau | 8e0bb0a | 2016-11-24 16:58:12 +0100 | [diff] [blame] | 100 | .name = "STRM", |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 101 | }; |
| 102 | |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 103 | /* |
| 104 | * This function only has to be called once after a wakeup event in case of |
| 105 | * suspected timeout. It controls the stream interface timeouts and sets |
| 106 | * si->flags accordingly. It does NOT close anything, as this timeout may |
| 107 | * be used for any purpose. It returns 1 if the timeout fired, otherwise |
| 108 | * zero. |
| 109 | */ |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 110 | int si_check_timeouts(struct stream_interface *si) |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 111 | { |
| 112 | if (tick_is_expired(si->exp, now_ms)) { |
| 113 | si->flags |= SI_FL_EXP; |
| 114 | return 1; |
| 115 | } |
| 116 | return 0; |
| 117 | } |
| 118 | |
Willy Tarreau | fe3718a | 2008-11-30 18:14:12 +0100 | [diff] [blame] | 119 | /* to be called only when in SI_ST_DIS with SI_FL_ERR */ |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 120 | void si_report_error(struct stream_interface *si) |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 121 | { |
| 122 | if (!si->err_type) |
| 123 | si->err_type = SI_ET_DATA_ERR; |
| 124 | |
Willy Tarreau | 2bb4a96 | 2014-11-28 11:11:05 +0100 | [diff] [blame] | 125 | si_oc(si)->flags |= CF_WRITE_ERROR; |
| 126 | si_ic(si)->flags |= CF_READ_ERROR; |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | /* |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 130 | * Returns a message to the client ; the connection is shut down for read, |
| 131 | * and the request is cleared so that no server connection can be initiated. |
| 132 | * The buffer is marked for read shutdown on the other side to protect the |
| 133 | * message, and the buffer write is enabled. The message is contained in a |
Willy Tarreau | 148d099 | 2010-01-10 10:21:21 +0100 | [diff] [blame] | 134 | * "chunk". If it is null, then an empty message is used. The reply buffer does |
| 135 | * not need to be empty before this, and its contents will not be overwritten. |
| 136 | * The primary goal of this function is to return error messages to a client. |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 137 | */ |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 138 | void si_retnclose(struct stream_interface *si, |
Willy Tarreau | 83061a8 | 2018-07-13 11:56:34 +0200 | [diff] [blame] | 139 | const struct buffer *msg) |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 140 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 141 | struct channel *ic = si_ic(si); |
| 142 | struct channel *oc = si_oc(si); |
| 143 | |
| 144 | channel_auto_read(ic); |
| 145 | channel_abort(ic); |
| 146 | channel_auto_close(ic); |
| 147 | channel_erase(ic); |
| 148 | channel_truncate(oc); |
Willy Tarreau | 798e128 | 2010-12-12 13:06:00 +0100 | [diff] [blame] | 149 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 150 | if (likely(msg && msg->data)) |
| 151 | co_inject(oc, msg->area, msg->data); |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 152 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 153 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
| 154 | channel_auto_read(oc); |
| 155 | channel_auto_close(oc); |
| 156 | channel_shutr_now(oc); |
Willy Tarreau | 5d881d0 | 2009-12-27 22:51:06 +0100 | [diff] [blame] | 157 | } |
| 158 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 159 | /* |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 160 | * This function performs a shutdown-read on a detached stream interface in a |
| 161 | * connected or init state (it does nothing for other states). It either shuts |
| 162 | * the read side or marks itself as closed. The buffer flags are updated to |
| 163 | * reflect the new state. If the stream interface has SI_FL_NOHALF, we also |
| 164 | * forward the close to the write side. The owner task is woken up if it exists. |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 165 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 166 | static void stream_int_shutr(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 167 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 168 | struct channel *ic = si_ic(si); |
| 169 | |
Willy Tarreau | abb5d42 | 2018-11-14 16:58:52 +0100 | [diff] [blame] | 170 | si_rx_shut_blk(si); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 171 | ic->flags &= ~CF_SHUTR_NOW; |
| 172 | if (ic->flags & CF_SHUTR) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 173 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 174 | ic->flags |= CF_SHUTR; |
| 175 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 176 | |
| 177 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 178 | return; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 179 | |
Willy Tarreau | 2bb4a96 | 2014-11-28 11:11:05 +0100 | [diff] [blame] | 180 | if (si_oc(si)->flags & CF_SHUTW) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 181 | si->state = SI_ST_DIS; |
| 182 | si->exp = TICK_ETERNITY; |
Willy Tarreau | d8ccffe | 2010-09-07 16:16:50 +0200 | [diff] [blame] | 183 | } |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 184 | else if (si->flags & SI_FL_NOHALF) { |
| 185 | /* we want to immediately forward this close to the write side */ |
| 186 | return stream_int_shutw(si); |
| 187 | } |
Willy Tarreau | 0bd05ea | 2010-07-02 11:18:03 +0200 | [diff] [blame] | 188 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 189 | /* note that if the task exists, it must unregister itself once it runs */ |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 190 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 191 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 192 | } |
| 193 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 194 | /* |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 195 | * This function performs a shutdown-write on a detached stream interface in a |
| 196 | * connected or init state (it does nothing for other states). It either shuts |
| 197 | * the write side or marks itself as closed. The buffer flags are updated to |
| 198 | * reflect the new state. It does also close everything if the SI was marked as |
| 199 | * being in error state. The owner task is woken up if it exists. |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 200 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 201 | static void stream_int_shutw(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 202 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 203 | struct channel *ic = si_ic(si); |
| 204 | struct channel *oc = si_oc(si); |
| 205 | |
| 206 | oc->flags &= ~CF_SHUTW_NOW; |
| 207 | if (oc->flags & CF_SHUTW) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 208 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 209 | oc->flags |= CF_SHUTW; |
| 210 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | 43e69dc | 2018-11-06 19:23:03 +0100 | [diff] [blame] | 211 | si_done_get(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 212 | |
Hongbo Long | e39683c | 2017-03-10 18:41:51 +0100 | [diff] [blame] | 213 | if (tick_isset(si->hcto)) { |
| 214 | ic->rto = si->hcto; |
| 215 | ic->rex = tick_add(now_ms, ic->rto); |
| 216 | } |
| 217 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 218 | switch (si->state) { |
| 219 | case SI_ST_EST: |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 220 | /* we have to shut before closing, otherwise some short messages |
| 221 | * may never leave the system, especially when there are remaining |
| 222 | * unread data in the socket input buffer, or when nolinger is set. |
| 223 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 224 | * no risk so we close both sides immediately. |
| 225 | */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 226 | if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) && |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 227 | !(ic->flags & (CF_SHUTR|CF_DONT_READ))) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 228 | return; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 229 | |
| 230 | /* fall through */ |
| 231 | case SI_ST_CON: |
| 232 | case SI_ST_CER: |
Willy Tarreau | 32d3ee9 | 2010-12-29 14:03:02 +0100 | [diff] [blame] | 233 | case SI_ST_QUE: |
| 234 | case SI_ST_TAR: |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 235 | /* Note that none of these states may happen with applets */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 236 | si->state = SI_ST_DIS; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 237 | default: |
Willy Tarreau | abb5d42 | 2018-11-14 16:58:52 +0100 | [diff] [blame] | 238 | si->flags &= ~SI_FL_NOLINGER; |
| 239 | si_rx_shut_blk(si); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 240 | ic->flags &= ~CF_SHUTR_NOW; |
| 241 | ic->flags |= CF_SHUTR; |
| 242 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 243 | si->exp = TICK_ETERNITY; |
| 244 | } |
| 245 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 246 | /* note that if the task exists, it must unregister itself once it runs */ |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 247 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 248 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 249 | } |
| 250 | |
| 251 | /* default chk_rcv function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 252 | static void stream_int_chk_rcv(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 253 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 254 | struct channel *ic = si_ic(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 255 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 256 | DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n", |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 257 | __FUNCTION__, |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 258 | si, si->state, ic->flags, si_oc(si)->flags); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 259 | |
Christopher Faulet | b3e0de4 | 2018-10-11 13:54:13 +0200 | [diff] [blame] | 260 | if (ic->pipe) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 261 | /* stop reading */ |
Willy Tarreau | db39843 | 2018-11-15 11:08:52 +0100 | [diff] [blame] | 262 | si_rx_room_blk(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 263 | } |
| 264 | else { |
| 265 | /* (re)start reading */ |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 266 | tasklet_wakeup(si->wait_event.task); |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 267 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 268 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 269 | } |
| 270 | } |
| 271 | |
| 272 | /* default chk_snd function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 273 | static void stream_int_chk_snd(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 274 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 275 | struct channel *oc = si_oc(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 276 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 277 | DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n", |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 278 | __FUNCTION__, |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 279 | si, si->state, si_ic(si)->flags, oc->flags); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 280 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 281 | if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW))) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 282 | return; |
| 283 | |
| 284 | if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 285 | channel_is_empty(oc)) /* called with nothing to send ! */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 286 | return; |
| 287 | |
| 288 | /* Otherwise there are remaining data to be sent in the buffer, |
| 289 | * so we tell the handler. |
| 290 | */ |
| 291 | si->flags &= ~SI_FL_WAIT_DATA; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 292 | if (!tick_isset(oc->wex)) |
| 293 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 294 | |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 295 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 296 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 297 | } |
| 298 | |
Willy Tarreau | a9ff5e6 | 2015-07-19 18:46:30 +0200 | [diff] [blame] | 299 | /* Register an applet to handle a stream_interface as a new appctx. The SI will |
| 300 | * wake it up everytime it is solicited. The appctx must be deleted by the task |
| 301 | * handler using si_release_endpoint(), possibly from within the function itself. |
| 302 | * It also pre-initializes the applet's context and returns it (or NULL in case |
| 303 | * it could not be allocated). |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 304 | */ |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 305 | struct appctx *si_register_handler(struct stream_interface *si, struct applet *app) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 306 | { |
Willy Tarreau | 0a23bcb | 2013-12-01 11:31:38 +0100 | [diff] [blame] | 307 | struct appctx *appctx; |
| 308 | |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 309 | DPRINTF(stderr, "registering handler %p for si %p (was %p)\n", app, si, si_task(si)); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 310 | |
Willy Tarreau | a7513f5 | 2015-04-05 00:15:26 +0200 | [diff] [blame] | 311 | appctx = si_alloc_appctx(si, app); |
Willy Tarreau | a69fc9f | 2014-12-22 19:34:00 +0100 | [diff] [blame] | 312 | if (!appctx) |
Willy Tarreau | 0a23bcb | 2013-12-01 11:31:38 +0100 | [diff] [blame] | 313 | return NULL; |
| 314 | |
Willy Tarreau | 0cd3bd6 | 2018-11-06 18:46:37 +0100 | [diff] [blame] | 315 | si_cant_get(si); |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 316 | appctx_wakeup(appctx); |
Willy Tarreau | 1fbe1c9 | 2013-12-01 09:35:41 +0100 | [diff] [blame] | 317 | return si_appctx(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 318 | } |
| 319 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 320 | /* This callback is used to send a valid PROXY protocol line to a socket being |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 321 | * established. It returns 0 if it fails in a fatal way or needs to poll to go |
| 322 | * further, otherwise it returns non-zero and removes itself from the connection's |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 323 | * flags (the bit is provided in <flag> by the caller). It is designed to be |
| 324 | * called by the connection handler and relies on it to commit polling changes. |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 325 | * Note that it can emit a PROXY line by relying on the other end's address |
| 326 | * when the connection is attached to a stream interface, or by resolving the |
| 327 | * local address otherwise (also called a LOCAL line). |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 328 | */ |
| 329 | int conn_si_send_proxy(struct connection *conn, unsigned int flag) |
| 330 | { |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 331 | /* we might have been called just after an asynchronous shutw */ |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 332 | if (conn->flags & CO_FL_SOCK_WR_SH) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 333 | goto out_error; |
| 334 | |
Willy Tarreau | d02cdd2 | 2013-12-15 10:23:20 +0100 | [diff] [blame] | 335 | if (!conn_ctrl_ready(conn)) |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 336 | goto out_error; |
| 337 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 338 | /* If we have a PROXY line to send, we'll use this to validate the |
| 339 | * connection, in which case the connection is validated only once |
| 340 | * we've sent the whole proxy line. Otherwise we use connect(). |
| 341 | */ |
Tim Duesterhus | 36839dc | 2019-02-26 17:09:51 +0100 | [diff] [blame] | 342 | if (conn->send_proxy_ofs) { |
Willy Tarreau | 6b1379f | 2018-11-18 21:38:19 +0100 | [diff] [blame] | 343 | const struct conn_stream *cs; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 344 | int ret; |
| 345 | |
Willy Tarreau | 6b1379f | 2018-11-18 21:38:19 +0100 | [diff] [blame] | 346 | cs = cs_get_first(conn); |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 347 | /* The target server expects a PROXY line to be sent first. |
| 348 | * If the send_proxy_ofs is negative, it corresponds to the |
| 349 | * offset to start sending from then end of the proxy string |
| 350 | * (which is recomputed every time since it's constant). If |
| 351 | * it is positive, it means we have to send from the start. |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 352 | * We can only send a "normal" PROXY line when the connection |
| 353 | * is attached to a stream interface. Otherwise we can only |
| 354 | * send a LOCAL line (eg: for use with health checks). |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 355 | */ |
Willy Tarreau | 6b1379f | 2018-11-18 21:38:19 +0100 | [diff] [blame] | 356 | |
| 357 | if (cs && cs->data_cb == &si_conn_cb) { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 358 | struct stream_interface *si = cs->data; |
| 359 | struct conn_stream *remote_cs = objt_cs(si_opposite(si)->end); |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 360 | ret = make_proxy_line(trash.area, trash.size, |
| 361 | objt_server(conn->target), |
| 362 | remote_cs ? remote_cs->conn : NULL); |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 363 | } |
| 364 | else { |
| 365 | /* The target server expects a LOCAL line to be sent first. Retrieving |
| 366 | * local or remote addresses may fail until the connection is established. |
| 367 | */ |
| 368 | conn_get_from_addr(conn); |
| 369 | if (!(conn->flags & CO_FL_ADDR_FROM_SET)) |
| 370 | goto out_wait; |
| 371 | |
| 372 | conn_get_to_addr(conn); |
| 373 | if (!(conn->flags & CO_FL_ADDR_TO_SET)) |
| 374 | goto out_wait; |
| 375 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 376 | ret = make_proxy_line(trash.area, trash.size, |
| 377 | objt_server(conn->target), conn); |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 378 | } |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 379 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 380 | if (!ret) |
| 381 | goto out_error; |
| 382 | |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 383 | if (conn->send_proxy_ofs > 0) |
| 384 | conn->send_proxy_ofs = -ret; /* first call */ |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 385 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 386 | /* we have to send trash from (ret+sp for -sp bytes). If the |
| 387 | * data layer has a pending write, we'll also set MSG_MORE. |
| 388 | */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 389 | ret = conn_sock_send(conn, |
| 390 | trash.area + ret + conn->send_proxy_ofs, |
| 391 | -conn->send_proxy_ofs, |
Olivier Houchard | 1a0545f | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 392 | (conn->flags & CO_FL_XPRT_WR_ENA) ? MSG_MORE : 0); |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 393 | |
Willy Tarreau | 0a03c0f | 2015-03-13 00:05:28 +0100 | [diff] [blame] | 394 | if (ret < 0) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 395 | goto out_error; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 396 | |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 397 | conn->send_proxy_ofs += ret; /* becomes zero once complete */ |
| 398 | if (conn->send_proxy_ofs != 0) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 399 | goto out_wait; |
| 400 | |
| 401 | /* OK we've sent the whole line, we're connected */ |
| 402 | } |
| 403 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 404 | /* The connection is ready now, simply return and let the connection |
| 405 | * handler notify upper layers if needed. |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 406 | */ |
| 407 | if (conn->flags & CO_FL_WAIT_L4_CONN) |
| 408 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 409 | conn->flags &= ~flag; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 410 | return 1; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 411 | |
| 412 | out_error: |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 413 | /* Write error on the file descriptor */ |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 414 | conn->flags |= CO_FL_ERROR; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 415 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 416 | |
| 417 | out_wait: |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 418 | __conn_sock_stop_recv(conn); |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 419 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 420 | } |
| 421 | |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 422 | |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 423 | /* This function is the equivalent to si_update() except that it's |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 424 | * designed to be called from outside the stream handlers, typically the lower |
| 425 | * layers (applets, connections) after I/O completion. After updating the stream |
| 426 | * interface and timeouts, it will try to forward what can be forwarded, then to |
| 427 | * wake the associated task up if an important event requires special handling. |
Willy Tarreau | d0f5bbc | 2018-11-14 11:10:26 +0100 | [diff] [blame] | 428 | * It may update SI_FL_WAIT_DATA and/or SI_FL_RXBLK_ROOM, that the callers are |
Willy Tarreau | 0dfccb2 | 2018-10-25 13:55:20 +0200 | [diff] [blame] | 429 | * encouraged to watch to take appropriate action. |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 430 | * It should not be called from within the stream itself, si_update() |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 431 | * is designed for this. |
| 432 | */ |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 433 | static void stream_int_notify(struct stream_interface *si) |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 434 | { |
| 435 | struct channel *ic = si_ic(si); |
| 436 | struct channel *oc = si_oc(si); |
Willy Tarreau | 47baeb8 | 2018-11-15 07:46:57 +0100 | [diff] [blame] | 437 | struct stream_interface *sio = si_opposite(si); |
Christopher Faulet | d7607de | 2019-01-03 16:24:54 +0100 | [diff] [blame] | 438 | struct task *task = si_task(si); |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 439 | |
| 440 | /* process consumer side */ |
| 441 | if (channel_is_empty(oc)) { |
Olivier Houchard | e9bed53 | 2017-11-16 17:49:25 +0100 | [diff] [blame] | 442 | struct connection *conn = objt_cs(si->end) ? objt_cs(si->end)->conn : NULL; |
| 443 | |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 444 | if (((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) && |
Olivier Houchard | e9bed53 | 2017-11-16 17:49:25 +0100 | [diff] [blame] | 445 | (si->state == SI_ST_EST) && (!conn || !(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS)))) |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 446 | si_shutw(si); |
| 447 | oc->wex = TICK_ETERNITY; |
| 448 | } |
| 449 | |
Willy Tarreau | 8cf9c8e | 2016-12-13 15:21:25 +0100 | [diff] [blame] | 450 | /* indicate that we may be waiting for data from the output channel or |
| 451 | * we're about to close and can't expect more data if SHUTW_NOW is there. |
| 452 | */ |
Christopher Faulet | b3e0de4 | 2018-10-11 13:54:13 +0200 | [diff] [blame] | 453 | if (!(oc->flags & (CF_SHUTW|CF_SHUTW_NOW))) |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 454 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | 8cf9c8e | 2016-12-13 15:21:25 +0100 | [diff] [blame] | 455 | else if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) |
| 456 | si->flags &= ~SI_FL_WAIT_DATA; |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 457 | |
| 458 | /* update OC timeouts and wake the other side up if it's waiting for room */ |
| 459 | if (oc->flags & CF_WRITE_ACTIVITY) { |
| 460 | if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
| 461 | !channel_is_empty(oc)) |
| 462 | if (tick_isset(oc->wex)) |
| 463 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
| 464 | |
| 465 | if (!(si->flags & SI_FL_INDEP_STR)) |
| 466 | if (tick_isset(ic->rex)) |
| 467 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 468 | } |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 469 | |
Willy Tarreau | 47baeb8 | 2018-11-15 07:46:57 +0100 | [diff] [blame] | 470 | if ((sio->flags & SI_FL_RXBLK_ROOM) && |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 471 | ((oc->flags & CF_WRITE_PARTIAL) || channel_is_empty(oc))) |
Willy Tarreau | db39843 | 2018-11-15 11:08:52 +0100 | [diff] [blame] | 472 | si_rx_room_rdy(sio); |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 473 | |
| 474 | if (oc->flags & CF_DONT_READ) |
| 475 | si_rx_chan_blk(sio); |
| 476 | else |
| 477 | si_rx_chan_rdy(sio); |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 478 | |
| 479 | /* Notify the other side when we've injected data into the IC that |
| 480 | * needs to be forwarded. We can do fast-forwarding as soon as there |
| 481 | * are output data, but we avoid doing this if some of the data are |
| 482 | * not yet scheduled for being forwarded, because it is very likely |
| 483 | * that it will be done again immediately afterwards once the following |
Willy Tarreau | d0f5bbc | 2018-11-14 11:10:26 +0100 | [diff] [blame] | 484 | * data are parsed (eg: HTTP chunking). We only SI_FL_RXBLK_ROOM once |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 485 | * we've emptied *some* of the output buffer, and not just when there |
| 486 | * is available room, because applets are often forced to stop before |
| 487 | * the buffer is full. We must not stop based on input data alone because |
| 488 | * an HTTP parser might need more data to complete the parsing. |
| 489 | */ |
| 490 | if (!channel_is_empty(ic) && |
Willy Tarreau | 47baeb8 | 2018-11-15 07:46:57 +0100 | [diff] [blame] | 491 | (sio->flags & SI_FL_WAIT_DATA) && |
Willy Tarreau | 89b6a2b | 2018-11-18 15:46:10 +0100 | [diff] [blame] | 492 | (!(ic->flags & CF_EXPECT_MORE) || c_full(ic) || ci_data(ic) == 0 || ic->pipe)) { |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 493 | int new_len, last_len; |
| 494 | |
Willy Tarreau | 77e478c | 2018-06-19 07:03:14 +0200 | [diff] [blame] | 495 | last_len = co_data(ic); |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 496 | if (ic->pipe) |
| 497 | last_len += ic->pipe->data; |
| 498 | |
Willy Tarreau | 47baeb8 | 2018-11-15 07:46:57 +0100 | [diff] [blame] | 499 | si_chk_snd(sio); |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 500 | |
Willy Tarreau | 77e478c | 2018-06-19 07:03:14 +0200 | [diff] [blame] | 501 | new_len = co_data(ic); |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 502 | if (ic->pipe) |
| 503 | new_len += ic->pipe->data; |
| 504 | |
| 505 | /* check if the consumer has freed some space either in the |
| 506 | * buffer or in the pipe. |
| 507 | */ |
Willy Tarreau | 47baeb8 | 2018-11-15 07:46:57 +0100 | [diff] [blame] | 508 | if (new_len < last_len) |
Willy Tarreau | db39843 | 2018-11-15 11:08:52 +0100 | [diff] [blame] | 509 | si_rx_room_rdy(si); |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 510 | } |
| 511 | |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 512 | if (!(ic->flags & CF_DONT_READ)) |
| 513 | si_rx_chan_rdy(si); |
| 514 | |
Willy Tarreau | 47baeb8 | 2018-11-15 07:46:57 +0100 | [diff] [blame] | 515 | si_chk_rcv(si); |
| 516 | si_chk_rcv(sio); |
| 517 | |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 518 | if (si_rx_blocked(si)) { |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 519 | ic->rex = TICK_ETERNITY; |
| 520 | } |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 521 | else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL)) == CF_READ_PARTIAL) { |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 522 | /* we must re-enable reading if si_chk_snd() has freed some space */ |
| 523 | if (!(ic->flags & CF_READ_NOEXP) && tick_isset(ic->rex)) |
| 524 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
| 525 | } |
| 526 | |
| 527 | /* wake the task up only when needed */ |
| 528 | if (/* changes on the production side */ |
| 529 | (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) || |
Willy Tarreau | b69f171 | 2018-11-08 14:32:16 +0100 | [diff] [blame] | 530 | (si->state != SI_ST_EST && si->state != SI_ST_CON) || |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 531 | (si->flags & SI_FL_ERR) || |
| 532 | ((ic->flags & CF_READ_PARTIAL) && |
Christopher Faulet | 297d3e2 | 2019-03-22 14:16:14 +0100 | [diff] [blame] | 533 | ((ic->flags & CF_EOI) || !ic->to_forward || sio->state != SI_ST_EST)) || |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 534 | |
| 535 | /* changes on the consumption side */ |
| 536 | (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) || |
Willy Tarreau | ede3d88 | 2018-10-24 17:17:56 +0200 | [diff] [blame] | 537 | ((oc->flags & CF_WRITE_ACTIVITY) && |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 538 | ((oc->flags & CF_SHUTW) || |
Willy Tarreau | 78f5ff8 | 2018-12-19 11:00:00 +0100 | [diff] [blame] | 539 | (((oc->flags & CF_WAKE_WRITE) || |
| 540 | !(oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW|CF_SHUTW))) && |
Willy Tarreau | 47baeb8 | 2018-11-15 07:46:57 +0100 | [diff] [blame] | 541 | (sio->state != SI_ST_EST || |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 542 | (channel_is_empty(oc) && !oc->to_forward)))))) { |
Christopher Faulet | d7607de | 2019-01-03 16:24:54 +0100 | [diff] [blame] | 543 | task_wakeup(task, TASK_WOKEN_IO); |
| 544 | } |
| 545 | else { |
| 546 | /* Update expiration date for the task and requeue it */ |
| 547 | task->expire = tick_first((tick_is_expired(task->expire, now_ms) ? 0 : task->expire), |
| 548 | tick_first(tick_first(ic->rex, ic->wex), |
| 549 | tick_first(oc->rex, oc->wex))); |
| 550 | task_queue(task); |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 551 | } |
| 552 | if (ic->flags & CF_READ_ACTIVITY) |
| 553 | ic->flags &= ~CF_READ_DONTWAIT; |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 554 | } |
| 555 | |
| 556 | |
Olivier Houchard | c2aa711 | 2018-09-11 18:27:21 +0200 | [diff] [blame] | 557 | /* Called by I/O handlers after completion.. It propagates |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 558 | * connection flags to the stream interface, updates the stream (which may or |
| 559 | * may not take this opportunity to try to forward data), then update the |
| 560 | * connection's polling based on the channels and stream interface's final |
| 561 | * states. The function always returns 0. |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 562 | */ |
Olivier Houchard | c2aa711 | 2018-09-11 18:27:21 +0200 | [diff] [blame] | 563 | static int si_cs_process(struct conn_stream *cs) |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 564 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 565 | struct connection *conn = cs->conn; |
| 566 | struct stream_interface *si = cs->data; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 567 | struct channel *ic = si_ic(si); |
| 568 | struct channel *oc = si_oc(si); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 569 | |
Olivier Houchard | c7ffa91 | 2018-08-28 19:37:41 +0200 | [diff] [blame] | 570 | /* If we have data to send, try it now */ |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 571 | if (!channel_is_empty(oc) && !(si->wait_event.events & SUB_RETRY_SEND)) |
Willy Tarreau | 908d26f | 2018-10-25 14:02:47 +0200 | [diff] [blame] | 572 | si_cs_send(cs); |
| 573 | |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 574 | /* First step, report to the stream-int what was detected at the |
| 575 | * connection layer : errors and connection establishment. |
| 576 | */ |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 577 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) |
Willy Tarreau | 3c55ec2 | 2012-07-23 19:19:51 +0200 | [diff] [blame] | 578 | si->flags |= SI_FL_ERR; |
| 579 | |
Olivier Houchard | ccaa7de | 2017-10-02 11:51:03 +0200 | [diff] [blame] | 580 | /* If we had early data, and the handshake ended, then |
| 581 | * we can remove the flag, and attempt to wake the task up, |
| 582 | * in the event there's an analyser waiting for the end of |
| 583 | * the handshake. |
| 584 | */ |
Olivier Houchard | 6fa63d9 | 2017-11-27 18:41:32 +0100 | [diff] [blame] | 585 | if (!(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS)) && |
| 586 | (cs->flags & CS_FL_WAIT_FOR_HS)) { |
| 587 | cs->flags &= ~CS_FL_WAIT_FOR_HS; |
Olivier Houchard | ccaa7de | 2017-10-02 11:51:03 +0200 | [diff] [blame] | 588 | task_wakeup(si_task(si), TASK_WOKEN_MSG); |
| 589 | } |
| 590 | |
Willy Tarreau | 52821e2 | 2017-03-18 17:11:37 +0100 | [diff] [blame] | 591 | if ((si->state < SI_ST_EST) && |
| 592 | (conn->flags & (CO_FL_CONNECTED | CO_FL_HANDSHAKE)) == CO_FL_CONNECTED) { |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 593 | si->exp = TICK_ETERNITY; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 594 | oc->flags |= CF_WRITE_NULL; |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 595 | } |
| 596 | |
Christopher Faulet | 203b2b0 | 2019-03-08 09:23:46 +0100 | [diff] [blame] | 597 | /* The last read was received but not reported to the channel |
| 598 | * (CS_FL_READ_NULL set but not SI_FL_READ_NULL). So do it, even if the |
| 599 | * EOS was already reported. |
| 600 | * |
| 601 | * NOTE: It is a temporary fix to handle client aborts. |
| 602 | */ |
| 603 | if (cs->flags & CS_FL_READ_NULL && !(si->flags & SI_FL_READ_NULL)) { |
| 604 | si->flags |= SI_FL_READ_NULL; |
| 605 | ic->flags |= CF_READ_NULL; |
| 606 | } |
Christopher Faulet | 297d3e2 | 2019-03-22 14:16:14 +0100 | [diff] [blame] | 607 | /* Report EOI on the channel if it was reached from the mux point of |
| 608 | * view. */ |
| 609 | if ((cs->flags & CS_FL_EOI) && !(ic->flags & CF_EOI)) |
| 610 | ic->flags |= CF_EOI; |
Christopher Faulet | 203b2b0 | 2019-03-08 09:23:46 +0100 | [diff] [blame] | 611 | |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 612 | /* Second step : update the stream-int and channels, try to forward any |
| 613 | * pending data, then possibly wake the stream up based on the new |
| 614 | * stream-int status. |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 615 | */ |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 616 | stream_int_notify(si); |
Christopher Faulet | a73e59b | 2016-12-09 17:30:18 +0100 | [diff] [blame] | 617 | channel_release_buffer(ic, &(si_strm(si)->buffer_wait)); |
Willy Tarreau | ea3cc48 | 2015-09-23 19:37:00 +0200 | [diff] [blame] | 618 | |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 619 | return 0; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 620 | } |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 621 | |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 622 | /* |
| 623 | * This function is called to send buffer data to a stream socket. |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 624 | * It calls the mux layer's snd_buf function. It relies on the |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 625 | * caller to commit polling changes. The caller should check conn->flags |
| 626 | * for errors. |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 627 | */ |
Olivier Houchard | 0e367bb | 2018-09-14 19:41:13 +0200 | [diff] [blame] | 628 | int si_cs_send(struct conn_stream *cs) |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 629 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 630 | struct connection *conn = cs->conn; |
| 631 | struct stream_interface *si = cs->data; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 632 | struct channel *oc = si_oc(si); |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 633 | int ret; |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 634 | int did_send = 0; |
| 635 | |
| 636 | /* We're already waiting to be able to send, give up */ |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 637 | if (si->wait_event.events & SUB_RETRY_SEND) |
Olivier Houchard | f653528 | 2018-08-31 17:29:12 +0200 | [diff] [blame] | 638 | return 0; |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 639 | |
Willy Tarreau | bddf7fc | 2018-12-19 17:17:10 +0100 | [diff] [blame] | 640 | if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) { |
| 641 | si->flags |= SI_FL_ERR; |
Olivier Houchard | c2aa711 | 2018-09-11 18:27:21 +0200 | [diff] [blame] | 642 | return 1; |
Willy Tarreau | bddf7fc | 2018-12-19 17:17:10 +0100 | [diff] [blame] | 643 | } |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 644 | |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 645 | /* we might have been called just after an asynchronous shutw */ |
Christopher Faulet | 55dec0d | 2018-11-20 10:30:02 +0100 | [diff] [blame] | 646 | if (conn->flags & CO_FL_SOCK_WR_SH || oc->flags & CF_SHUTW) |
Olivier Houchard | c2aa711 | 2018-09-11 18:27:21 +0200 | [diff] [blame] | 647 | return 1; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 648 | |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 649 | if (oc->pipe && conn->xprt->snd_pipe && conn->mux->snd_pipe) { |
| 650 | ret = conn->mux->snd_pipe(cs, oc->pipe); |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 651 | if (ret > 0) { |
Willy Tarreau | ede3d88 | 2018-10-24 17:17:56 +0200 | [diff] [blame] | 652 | oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA; |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 653 | did_send = 1; |
| 654 | } |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 655 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 656 | if (!oc->pipe->data) { |
| 657 | put_pipe(oc->pipe); |
| 658 | oc->pipe = NULL; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 659 | } |
| 660 | |
Willy Tarreau | bddf7fc | 2018-12-19 17:17:10 +0100 | [diff] [blame] | 661 | if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) { |
| 662 | si->flags |= SI_FL_ERR; |
Christopher Faulet | 5ed7aab | 2018-11-19 22:02:07 +0100 | [diff] [blame] | 663 | return 1; |
Willy Tarreau | bddf7fc | 2018-12-19 17:17:10 +0100 | [diff] [blame] | 664 | } |
Christopher Faulet | 3f76f4c | 2018-11-20 10:21:08 +0100 | [diff] [blame] | 665 | |
| 666 | if (oc->pipe) |
| 667 | goto end; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 668 | } |
| 669 | |
| 670 | /* At this point, the pipe is empty, but we may still have data pending |
| 671 | * in the normal buffer. |
| 672 | */ |
Christopher Faulet | 55dec0d | 2018-11-20 10:30:02 +0100 | [diff] [blame] | 673 | if (co_data(oc)) { |
| 674 | /* when we're here, we already know that there is no spliced |
| 675 | * data left, and that there are sendable buffered data. |
| 676 | */ |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 677 | |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 678 | /* check if we want to inform the kernel that we're interested in |
| 679 | * sending more data after this call. We want this if : |
| 680 | * - we're about to close after this last send and want to merge |
| 681 | * the ongoing FIN with the last segment. |
| 682 | * - we know we can't send everything at once and must get back |
| 683 | * here because of unaligned data |
| 684 | * - there is still a finite amount of data to forward |
| 685 | * The test is arranged so that the most common case does only 2 |
| 686 | * tests. |
| 687 | */ |
Willy Tarreau | 1049b1f | 2014-02-02 01:51:17 +0100 | [diff] [blame] | 688 | unsigned int send_flag = 0; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 689 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 690 | if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) && |
| 691 | ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) || |
Willy Tarreau | 4ac4928 | 2017-10-17 16:33:46 +0200 | [diff] [blame] | 692 | (oc->flags & CF_EXPECT_MORE))) || |
Willy Tarreau | ecd2e15 | 2017-11-07 15:07:25 +0100 | [diff] [blame] | 693 | ((oc->flags & CF_ISRESP) && |
| 694 | ((oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW)) == (CF_AUTO_CLOSE|CF_SHUTW_NOW)))) |
Willy Tarreau | 1049b1f | 2014-02-02 01:51:17 +0100 | [diff] [blame] | 695 | send_flag |= CO_SFL_MSG_MORE; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 696 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 697 | if (oc->flags & CF_STREAMER) |
Willy Tarreau | 7bed945 | 2014-02-02 02:00:24 +0100 | [diff] [blame] | 698 | send_flag |= CO_SFL_STREAMER; |
| 699 | |
Olivier Houchard | ed0f207 | 2018-08-16 15:41:52 +0200 | [diff] [blame] | 700 | ret = cs->conn->mux->snd_buf(cs, &oc->buf, co_data(oc), send_flag); |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 701 | if (ret > 0) { |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 702 | did_send = 1; |
Willy Tarreau | ede3d88 | 2018-10-24 17:17:56 +0200 | [diff] [blame] | 703 | oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 704 | |
Willy Tarreau | 77e478c | 2018-06-19 07:03:14 +0200 | [diff] [blame] | 705 | co_set_data(oc, co_data(oc) - ret); |
Willy Tarreau | deccd11 | 2018-06-14 18:38:55 +0200 | [diff] [blame] | 706 | c_realign_if_empty(oc); |
| 707 | |
| 708 | if (!co_data(oc)) { |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 709 | /* Always clear both flags once everything has been sent, they're one-shot */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 710 | oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT); |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 711 | } |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 712 | |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 713 | /* if some data remain in the buffer, it's only because the |
| 714 | * system buffers are full, we will try next time. |
| 715 | */ |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 716 | } |
Christopher Faulet | e4acd5e | 2018-11-20 09:34:35 +0100 | [diff] [blame] | 717 | |
Willy Tarreau | bddf7fc | 2018-12-19 17:17:10 +0100 | [diff] [blame] | 718 | if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) { |
| 719 | si->flags |= SI_FL_ERR; |
Christopher Faulet | e4acd5e | 2018-11-20 09:34:35 +0100 | [diff] [blame] | 720 | return 1; |
Willy Tarreau | bddf7fc | 2018-12-19 17:17:10 +0100 | [diff] [blame] | 721 | } |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 722 | } |
Christopher Faulet | 55dec0d | 2018-11-20 10:30:02 +0100 | [diff] [blame] | 723 | |
Willy Tarreau | f6975aa | 2018-11-15 14:33:05 +0100 | [diff] [blame] | 724 | end: |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 725 | /* We couldn't send all of our data, let the mux know we'd like to send more */ |
Willy Tarreau | 691fe39 | 2018-11-12 18:48:52 +0100 | [diff] [blame] | 726 | if (!channel_is_empty(oc)) |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 727 | conn->mux->subscribe(cs, SUB_RETRY_SEND, &si->wait_event); |
Olivier Houchard | f653528 | 2018-08-31 17:29:12 +0200 | [diff] [blame] | 728 | return did_send; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 729 | } |
| 730 | |
Willy Tarreau | 8ccd208 | 2018-11-07 07:47:52 +0100 | [diff] [blame] | 731 | /* This is the ->process() function for any stream-interface's wait_event task. |
| 732 | * It's assigned during the stream-interface's initialization, for any type of |
| 733 | * stream interface. Thus it is always safe to perform a tasklet_wakeup() on a |
| 734 | * stream interface, as the presence of the CS is checked there. |
| 735 | */ |
Olivier Houchard | 91894cb | 2018-08-02 18:06:28 +0200 | [diff] [blame] | 736 | struct task *si_cs_io_cb(struct task *t, void *ctx, unsigned short state) |
| 737 | { |
Olivier Houchard | 8f0b4c6 | 2018-08-02 18:21:38 +0200 | [diff] [blame] | 738 | struct stream_interface *si = ctx; |
Olivier Houchard | a6ff035 | 2018-08-21 15:59:43 +0200 | [diff] [blame] | 739 | struct conn_stream *cs = objt_cs(si->end); |
Olivier Houchard | f653528 | 2018-08-31 17:29:12 +0200 | [diff] [blame] | 740 | int ret = 0; |
Olivier Houchard | a6ff035 | 2018-08-21 15:59:43 +0200 | [diff] [blame] | 741 | |
| 742 | if (!cs) |
| 743 | return NULL; |
Willy Tarreau | 8ccd208 | 2018-11-07 07:47:52 +0100 | [diff] [blame] | 744 | |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 745 | if (!(si->wait_event.events & SUB_RETRY_SEND) && !channel_is_empty(si_oc(si))) |
Olivier Houchard | f653528 | 2018-08-31 17:29:12 +0200 | [diff] [blame] | 746 | ret = si_cs_send(cs); |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 747 | if (!(si->wait_event.events & SUB_RETRY_RECV)) |
Olivier Houchard | f653528 | 2018-08-31 17:29:12 +0200 | [diff] [blame] | 748 | ret |= si_cs_recv(cs); |
| 749 | if (ret != 0) |
Olivier Houchard | c2aa711 | 2018-09-11 18:27:21 +0200 | [diff] [blame] | 750 | si_cs_process(cs); |
Olivier Houchard | f653528 | 2018-08-31 17:29:12 +0200 | [diff] [blame] | 751 | |
Olivier Houchard | 91894cb | 2018-08-02 18:06:28 +0200 | [diff] [blame] | 752 | return (NULL); |
| 753 | } |
| 754 | |
Willy Tarreau | 25f1310 | 2015-09-24 11:32:22 +0200 | [diff] [blame] | 755 | /* This function is designed to be called from within the stream handler to |
| 756 | * update the channels' expiration timers and the stream interface's flags |
| 757 | * based on the channels' flags. It needs to be called only once after the |
| 758 | * channels' flags have settled down, and before they are cleared, though it |
| 759 | * doesn't harm to call it as often as desired (it just slightly hurts |
| 760 | * performance). It must not be called from outside of the stream handler, |
| 761 | * as what it does will be used to compute the stream task's expiration. |
| 762 | */ |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 763 | void si_update(struct stream_interface *si) |
Willy Tarreau | 25f1310 | 2015-09-24 11:32:22 +0200 | [diff] [blame] | 764 | { |
| 765 | struct channel *ic = si_ic(si); |
| 766 | struct channel *oc = si_oc(si); |
| 767 | |
| 768 | if (!(ic->flags & CF_SHUTR)) { |
| 769 | /* Read not closed, update FD status and timeout for reads */ |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 770 | if (ic->flags & CF_DONT_READ) |
| 771 | si_rx_chan_blk(si); |
| 772 | else |
| 773 | si_rx_chan_rdy(si); |
| 774 | |
| 775 | if (!channel_is_empty(ic)) { |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 776 | /* stop reading, imposed by channel's policy or contents */ |
Willy Tarreau | db39843 | 2018-11-15 11:08:52 +0100 | [diff] [blame] | 777 | si_rx_room_blk(si); |
Willy Tarreau | 25f1310 | 2015-09-24 11:32:22 +0200 | [diff] [blame] | 778 | } |
Christopher Faulet | b3e0de4 | 2018-10-11 13:54:13 +0200 | [diff] [blame] | 779 | else { |
Willy Tarreau | 25f1310 | 2015-09-24 11:32:22 +0200 | [diff] [blame] | 780 | /* (re)start reading and update timeout. Note: we don't recompute the timeout |
| 781 | * everytime we get here, otherwise it would risk never to expire. We only |
| 782 | * update it if is was not yet set. The stream socket handler will already |
| 783 | * have updated it if there has been a completed I/O. |
| 784 | */ |
Willy Tarreau | db39843 | 2018-11-15 11:08:52 +0100 | [diff] [blame] | 785 | si_rx_room_rdy(si); |
Willy Tarreau | 25f1310 | 2015-09-24 11:32:22 +0200 | [diff] [blame] | 786 | } |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 787 | if (si->flags & SI_FL_RXBLK_ANY & ~SI_FL_RX_WAIT_EP) |
| 788 | ic->rex = TICK_ETERNITY; |
| 789 | else if (!(ic->flags & CF_READ_NOEXP) && !tick_isset(ic->rex)) |
| 790 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
| 791 | |
Willy Tarreau | 47baeb8 | 2018-11-15 07:46:57 +0100 | [diff] [blame] | 792 | si_chk_rcv(si); |
Willy Tarreau | 25f1310 | 2015-09-24 11:32:22 +0200 | [diff] [blame] | 793 | } |
Willy Tarreau | abb5d42 | 2018-11-14 16:58:52 +0100 | [diff] [blame] | 794 | else |
| 795 | si_rx_shut_blk(si); |
Willy Tarreau | 25f1310 | 2015-09-24 11:32:22 +0200 | [diff] [blame] | 796 | |
| 797 | if (!(oc->flags & CF_SHUTW)) { |
| 798 | /* Write not closed, update FD status and timeout for writes */ |
| 799 | if (channel_is_empty(oc)) { |
| 800 | /* stop writing */ |
| 801 | if (!(si->flags & SI_FL_WAIT_DATA)) { |
| 802 | if ((oc->flags & CF_SHUTW_NOW) == 0) |
| 803 | si->flags |= SI_FL_WAIT_DATA; |
| 804 | oc->wex = TICK_ETERNITY; |
| 805 | } |
| 806 | } |
| 807 | else { |
| 808 | /* (re)start writing and update timeout. Note: we don't recompute the timeout |
| 809 | * everytime we get here, otherwise it would risk never to expire. We only |
| 810 | * update it if is was not yet set. The stream socket handler will already |
| 811 | * have updated it if there has been a completed I/O. |
| 812 | */ |
| 813 | si->flags &= ~SI_FL_WAIT_DATA; |
| 814 | if (!tick_isset(oc->wex)) { |
| 815 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
| 816 | if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
| 817 | /* Note: depending on the protocol, we don't know if we're waiting |
| 818 | * for incoming data or not. So in order to prevent the socket from |
| 819 | * expiring read timeouts during writes, we refresh the read timeout, |
| 820 | * except if it was already infinite or if we have explicitly setup |
| 821 | * independent streams. |
| 822 | */ |
| 823 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
| 824 | } |
| 825 | } |
| 826 | } |
| 827 | } |
| 828 | } |
| 829 | |
Willy Tarreau | d14844a | 2018-11-08 18:15:29 +0100 | [diff] [blame] | 830 | /* updates both stream ints of a same stream at once */ |
| 831 | /* Updates at once the channel flags, and timers of both stream interfaces of a |
| 832 | * same stream, to complete the work after the analysers, then updates the data |
| 833 | * layer below. This will ensure that any synchronous update performed at the |
| 834 | * data layer will be reflected in the channel flags and/or stream-interface. |
| 835 | */ |
| 836 | void si_update_both(struct stream_interface *si_f, struct stream_interface *si_b) |
| 837 | { |
| 838 | struct channel *req = si_ic(si_f); |
| 839 | struct channel *res = si_oc(si_f); |
Willy Tarreau | bf89ff3 | 2018-11-09 14:59:25 +0100 | [diff] [blame] | 840 | struct conn_stream *cs; |
Willy Tarreau | d14844a | 2018-11-08 18:15:29 +0100 | [diff] [blame] | 841 | |
| 842 | req->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL); |
| 843 | res->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL); |
| 844 | |
| 845 | si_f->flags &= ~(SI_FL_ERR|SI_FL_EXP); |
| 846 | si_b->flags &= ~(SI_FL_ERR|SI_FL_EXP); |
| 847 | |
| 848 | si_f->prev_state = si_f->state; |
| 849 | si_b->prev_state = si_b->state; |
| 850 | |
Willy Tarreau | bf89ff3 | 2018-11-09 14:59:25 +0100 | [diff] [blame] | 851 | /* front stream-int */ |
| 852 | cs = objt_cs(si_f->end); |
| 853 | if (cs && |
| 854 | si_f->state == SI_ST_EST && |
| 855 | !(res->flags & CF_SHUTW) && /* Write not closed */ |
| 856 | !channel_is_empty(res) && |
| 857 | !(cs->flags & CS_FL_ERROR) && |
| 858 | !(cs->conn->flags & CO_FL_ERROR)) { |
| 859 | if (si_cs_send(cs)) |
Willy Tarreau | db39843 | 2018-11-15 11:08:52 +0100 | [diff] [blame] | 860 | si_rx_room_rdy(si_b); |
Willy Tarreau | bf89ff3 | 2018-11-09 14:59:25 +0100 | [diff] [blame] | 861 | } |
| 862 | |
| 863 | /* back stream-int */ |
| 864 | cs = objt_cs(si_b->end); |
| 865 | if (cs && |
| 866 | (si_b->state == SI_ST_EST || si_b->state == SI_ST_CON) && |
| 867 | !(req->flags & CF_SHUTW) && /* Write not closed */ |
| 868 | !channel_is_empty(req) && |
Willy Tarreau | bddf7fc | 2018-12-19 17:17:10 +0100 | [diff] [blame] | 869 | !(cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) && |
Willy Tarreau | bf89ff3 | 2018-11-09 14:59:25 +0100 | [diff] [blame] | 870 | !(cs->conn->flags & CO_FL_ERROR)) { |
| 871 | if (si_cs_send(cs)) |
Willy Tarreau | db39843 | 2018-11-15 11:08:52 +0100 | [diff] [blame] | 872 | si_rx_room_rdy(si_f); |
Willy Tarreau | bf89ff3 | 2018-11-09 14:59:25 +0100 | [diff] [blame] | 873 | } |
| 874 | |
Willy Tarreau | bf89ff3 | 2018-11-09 14:59:25 +0100 | [diff] [blame] | 875 | /* let's recompute both sides states */ |
| 876 | if (si_f->state == SI_ST_EST) |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 877 | si_update(si_f); |
Willy Tarreau | bf89ff3 | 2018-11-09 14:59:25 +0100 | [diff] [blame] | 878 | |
| 879 | if (si_b->state == SI_ST_EST) |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 880 | si_update(si_b); |
Willy Tarreau | bf89ff3 | 2018-11-09 14:59:25 +0100 | [diff] [blame] | 881 | |
| 882 | /* stream ints are processed outside of process_stream() and must be |
| 883 | * handled at the latest moment. |
| 884 | */ |
| 885 | if (obj_type(si_f->end) == OBJ_TYPE_APPCTX && |
Willy Tarreau | 32742fd | 2018-11-14 14:07:59 +0100 | [diff] [blame] | 886 | ((si_rx_endp_ready(si_f) && !si_rx_blocked(si_f)) || |
| 887 | (si_tx_endp_ready(si_f) && !si_tx_blocked(si_f)))) |
Willy Tarreau | bf89ff3 | 2018-11-09 14:59:25 +0100 | [diff] [blame] | 888 | appctx_wakeup(si_appctx(si_f)); |
Willy Tarreau | d14844a | 2018-11-08 18:15:29 +0100 | [diff] [blame] | 889 | |
Willy Tarreau | bf89ff3 | 2018-11-09 14:59:25 +0100 | [diff] [blame] | 890 | if (obj_type(si_b->end) == OBJ_TYPE_APPCTX && |
Willy Tarreau | 32742fd | 2018-11-14 14:07:59 +0100 | [diff] [blame] | 891 | ((si_rx_endp_ready(si_b) && !si_rx_blocked(si_b)) || |
| 892 | (si_tx_endp_ready(si_b) && !si_tx_blocked(si_b)))) |
Willy Tarreau | bf89ff3 | 2018-11-09 14:59:25 +0100 | [diff] [blame] | 893 | appctx_wakeup(si_appctx(si_b)); |
Willy Tarreau | d14844a | 2018-11-08 18:15:29 +0100 | [diff] [blame] | 894 | } |
| 895 | |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 896 | /* |
| 897 | * This function performs a shutdown-read on a stream interface attached to |
| 898 | * a connection in a connected or init state (it does nothing for other |
| 899 | * states). It either shuts the read side or marks itself as closed. The buffer |
| 900 | * flags are updated to reflect the new state. If the stream interface has |
| 901 | * SI_FL_NOHALF, we also forward the close to the write side. If a control |
| 902 | * layer is defined, then it is supposed to be a socket layer and file |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 903 | * descriptors are then shutdown or closed accordingly. The function |
| 904 | * automatically disables polling if needed. |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 905 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 906 | static void stream_int_shutr_conn(struct stream_interface *si) |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 907 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 908 | struct conn_stream *cs = __objt_cs(si->end); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 909 | struct channel *ic = si_ic(si); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 910 | |
Willy Tarreau | abb5d42 | 2018-11-14 16:58:52 +0100 | [diff] [blame] | 911 | si_rx_shut_blk(si); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 912 | ic->flags &= ~CF_SHUTR_NOW; |
| 913 | if (ic->flags & CF_SHUTR) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 914 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 915 | ic->flags |= CF_SHUTR; |
| 916 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 917 | |
| 918 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 919 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 920 | |
Willy Tarreau | 51d0a7e | 2019-01-31 19:09:59 +0100 | [diff] [blame] | 921 | if (si->flags & SI_FL_KILL_CONN) |
| 922 | cs->flags |= CS_FL_KILL_CONN; |
| 923 | |
Willy Tarreau | 2bb4a96 | 2014-11-28 11:11:05 +0100 | [diff] [blame] | 924 | if (si_oc(si)->flags & CF_SHUTW) { |
Willy Tarreau | a553ae9 | 2017-10-05 18:52:17 +0200 | [diff] [blame] | 925 | cs_close(cs); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 926 | si->state = SI_ST_DIS; |
| 927 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 928 | } |
| 929 | else if (si->flags & SI_FL_NOHALF) { |
| 930 | /* we want to immediately forward this close to the write side */ |
| 931 | return stream_int_shutw_conn(si); |
| 932 | } |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 933 | } |
| 934 | |
| 935 | /* |
| 936 | * This function performs a shutdown-write on a stream interface attached to |
| 937 | * a connection in a connected or init state (it does nothing for other |
| 938 | * states). It either shuts the write side or marks itself as closed. The |
| 939 | * buffer flags are updated to reflect the new state. It does also close |
| 940 | * everything if the SI was marked as being in error state. If there is a |
Willy Tarreau | 1398aa1 | 2015-03-12 23:04:07 +0100 | [diff] [blame] | 941 | * data-layer shutdown, it is called. |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 942 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 943 | static void stream_int_shutw_conn(struct stream_interface *si) |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 944 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 945 | struct conn_stream *cs = __objt_cs(si->end); |
| 946 | struct connection *conn = cs->conn; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 947 | struct channel *ic = si_ic(si); |
| 948 | struct channel *oc = si_oc(si); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 949 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 950 | oc->flags &= ~CF_SHUTW_NOW; |
| 951 | if (oc->flags & CF_SHUTW) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 952 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 953 | oc->flags |= CF_SHUTW; |
| 954 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | 43e69dc | 2018-11-06 19:23:03 +0100 | [diff] [blame] | 955 | si_done_get(si); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 956 | |
Hongbo Long | e39683c | 2017-03-10 18:41:51 +0100 | [diff] [blame] | 957 | if (tick_isset(si->hcto)) { |
| 958 | ic->rto = si->hcto; |
| 959 | ic->rex = tick_add(now_ms, ic->rto); |
| 960 | } |
| 961 | |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 962 | switch (si->state) { |
| 963 | case SI_ST_EST: |
| 964 | /* we have to shut before closing, otherwise some short messages |
| 965 | * may never leave the system, especially when there are remaining |
| 966 | * unread data in the socket input buffer, or when nolinger is set. |
| 967 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 968 | * no risk so we close both sides immediately. |
| 969 | */ |
Willy Tarreau | 51d0a7e | 2019-01-31 19:09:59 +0100 | [diff] [blame] | 970 | if (si->flags & SI_FL_KILL_CONN) |
| 971 | cs->flags |= CS_FL_KILL_CONN; |
| 972 | |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 973 | if (si->flags & SI_FL_ERR) { |
| 974 | /* quick close, the socket is alredy shut anyway */ |
| 975 | } |
| 976 | else if (si->flags & SI_FL_NOLINGER) { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 977 | /* unclean data-layer shutdown, typically an aborted request |
| 978 | * or a forwarded shutdown from a client to a server due to |
| 979 | * option abortonclose. No need for the TLS layer to try to |
| 980 | * emit a shutdown message. |
| 981 | */ |
Willy Tarreau | ecdb3fe | 2017-10-05 15:25:48 +0200 | [diff] [blame] | 982 | cs_shutw(cs, CS_SHW_SILENT); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 983 | } |
| 984 | else { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 985 | /* clean data-layer shutdown. This only happens on the |
| 986 | * frontend side, or on the backend side when forwarding |
| 987 | * a client close in TCP mode or in HTTP TUNNEL mode |
| 988 | * while option abortonclose is set. We want the TLS |
| 989 | * layer to try to signal it to the peer before we close. |
| 990 | */ |
Willy Tarreau | ecdb3fe | 2017-10-05 15:25:48 +0200 | [diff] [blame] | 991 | cs_shutw(cs, CS_SHW_NORMAL); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 992 | |
Willy Tarreau | a553ae9 | 2017-10-05 18:52:17 +0200 | [diff] [blame] | 993 | if (!(ic->flags & (CF_SHUTR|CF_DONT_READ))) { |
| 994 | /* OK just a shutw, but we want the caller |
| 995 | * to disable polling on this FD if exists. |
| 996 | */ |
| 997 | conn_cond_update_polling(conn); |
| 998 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 999 | } |
| 1000 | } |
| 1001 | |
| 1002 | /* fall through */ |
| 1003 | case SI_ST_CON: |
| 1004 | /* we may have to close a pending connection, and mark the |
| 1005 | * response buffer as shutr |
| 1006 | */ |
Willy Tarreau | 51d0a7e | 2019-01-31 19:09:59 +0100 | [diff] [blame] | 1007 | if (si->flags & SI_FL_KILL_CONN) |
| 1008 | cs->flags |= CS_FL_KILL_CONN; |
Willy Tarreau | a553ae9 | 2017-10-05 18:52:17 +0200 | [diff] [blame] | 1009 | cs_close(cs); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 1010 | /* fall through */ |
| 1011 | case SI_ST_CER: |
| 1012 | case SI_ST_QUE: |
| 1013 | case SI_ST_TAR: |
| 1014 | si->state = SI_ST_DIS; |
Willy Tarreau | 4a59f2f | 2013-10-24 20:10:45 +0200 | [diff] [blame] | 1015 | /* fall through */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 1016 | default: |
Willy Tarreau | abb5d42 | 2018-11-14 16:58:52 +0100 | [diff] [blame] | 1017 | si->flags &= ~SI_FL_NOLINGER; |
| 1018 | si_rx_shut_blk(si); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1019 | ic->flags &= ~CF_SHUTR_NOW; |
| 1020 | ic->flags |= CF_SHUTR; |
| 1021 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 1022 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 1023 | } |
| 1024 | } |
| 1025 | |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 1026 | /* This function is used for inter-stream-interface calls. It is called by the |
| 1027 | * consumer to inform the producer side that it may be interested in checking |
| 1028 | * for free space in the buffer. Note that it intentionally does not update |
| 1029 | * timeouts, so that we can still check them later at wake-up. This function is |
| 1030 | * dedicated to connection-based stream interfaces. |
| 1031 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 1032 | static void stream_int_chk_rcv_conn(struct stream_interface *si) |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 1033 | { |
Christopher Faulet | b3e0de4 | 2018-10-11 13:54:13 +0200 | [diff] [blame] | 1034 | /* (re)start reading */ |
| 1035 | tasklet_wakeup(si->wait_event.task); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 1036 | } |
| 1037 | |
| 1038 | |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1039 | /* This function is used for inter-stream-interface calls. It is called by the |
| 1040 | * producer to inform the consumer side that it may be interested in checking |
| 1041 | * for data in the buffer. Note that it intentionally does not update timeouts, |
| 1042 | * so that we can still check them later at wake-up. |
| 1043 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 1044 | static void stream_int_chk_snd_conn(struct stream_interface *si) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1045 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1046 | struct channel *oc = si_oc(si); |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1047 | struct conn_stream *cs = __objt_cs(si->end); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1048 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1049 | if (unlikely(si->state > SI_ST_EST || (oc->flags & CF_SHUTW))) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1050 | return; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1051 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1052 | if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1053 | return; |
| 1054 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1055 | if (!oc->pipe && /* spliced data wants to be forwarded ASAP */ |
Willy Tarreau | b016587 | 2012-12-15 10:12:39 +0100 | [diff] [blame] | 1056 | !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1057 | return; |
| 1058 | |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 1059 | if (!(si->wait_event.events & SUB_RETRY_SEND) && !channel_is_empty(si_oc(si))) |
Olivier Houchard | 31f04e4 | 2018-10-22 16:01:09 +0200 | [diff] [blame] | 1060 | si_cs_send(cs); |
Willy Tarreau | 33a09a5 | 2018-10-25 13:49:49 +0200 | [diff] [blame] | 1061 | |
Willy Tarreau | bddf7fc | 2018-12-19 17:17:10 +0100 | [diff] [blame] | 1062 | if (cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING) || cs->conn->flags & CO_FL_ERROR) { |
Willy Tarreau | 3b9c850 | 2017-10-25 14:22:28 +0200 | [diff] [blame] | 1063 | /* Write error on the file descriptor */ |
Willy Tarreau | 3b9c850 | 2017-10-25 14:22:28 +0200 | [diff] [blame] | 1064 | si->flags |= SI_FL_ERR; |
| 1065 | goto out_wakeup; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1066 | } |
| 1067 | |
| 1068 | /* OK, so now we know that some data might have been sent, and that we may |
| 1069 | * have to poll first. We have to do that too if the buffer is not empty. |
| 1070 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1071 | if (channel_is_empty(oc)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1072 | /* the connection is established but we can't write. Either the |
| 1073 | * buffer is empty, or we just refrain from sending because the |
| 1074 | * ->o limit was reached. Maybe we just wrote the last |
| 1075 | * chunk and need to close. |
| 1076 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1077 | if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) == |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1078 | (CF_AUTO_CLOSE|CF_SHUTW_NOW)) && |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1079 | (si->state == SI_ST_EST)) { |
| 1080 | si_shutw(si); |
| 1081 | goto out_wakeup; |
| 1082 | } |
| 1083 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1084 | if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1085 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1086 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1087 | } |
| 1088 | else { |
| 1089 | /* Otherwise there are remaining data to be sent in the buffer, |
| 1090 | * which means we have to poll before doing so. |
| 1091 | */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1092 | si->flags &= ~SI_FL_WAIT_DATA; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1093 | if (!tick_isset(oc->wex)) |
| 1094 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1095 | } |
| 1096 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1097 | if (likely(oc->flags & CF_WRITE_ACTIVITY)) { |
| 1098 | struct channel *ic = si_ic(si); |
| 1099 | |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1100 | /* update timeout if we have written something */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1101 | if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
| 1102 | !channel_is_empty(oc)) |
| 1103 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1104 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1105 | if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1106 | /* Note: to prevent the client from expiring read timeouts |
| 1107 | * during writes, we refresh it. We only do this if the |
| 1108 | * interface is not configured for "independent streams", |
| 1109 | * because for some applications it's better not to do this, |
| 1110 | * for instance when continuously exchanging small amounts |
| 1111 | * of data which can full the socket buffers long before a |
| 1112 | * write timeout is detected. |
| 1113 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1114 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1115 | } |
| 1116 | } |
| 1117 | |
| 1118 | /* in case of special condition (error, shutdown, end of write...), we |
| 1119 | * have to notify the task. |
| 1120 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1121 | if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) || |
| 1122 | ((oc->flags & CF_WAKE_WRITE) && |
| 1123 | ((channel_is_empty(oc) && !oc->to_forward) || |
Willy Tarreau | e6300be | 2014-01-25 02:33:21 +0100 | [diff] [blame] | 1124 | si->state != SI_ST_EST)))) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1125 | out_wakeup: |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 1126 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 1127 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1128 | } |
| 1129 | } |
| 1130 | |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1131 | /* |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1132 | * This is the callback which is called by the connection layer to receive data |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1133 | * into the buffer from the connection. It iterates over the mux layer's |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 1134 | * rcv_buf function. |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1135 | */ |
Olivier Houchard | 0e367bb | 2018-09-14 19:41:13 +0200 | [diff] [blame] | 1136 | int si_cs_recv(struct conn_stream *cs) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1137 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1138 | struct connection *conn = cs->conn; |
| 1139 | struct stream_interface *si = cs->data; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1140 | struct channel *ic = si_ic(si); |
Olivier Houchard | f653528 | 2018-08-31 17:29:12 +0200 | [diff] [blame] | 1141 | int ret, max, cur_read = 0; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1142 | int read_poll = MAX_READ_POLL_LOOPS; |
Christopher Faulet | c6618d6 | 2018-10-11 15:56:04 +0200 | [diff] [blame] | 1143 | int flags = 0; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1144 | |
Olivier Houchard | f653528 | 2018-08-31 17:29:12 +0200 | [diff] [blame] | 1145 | /* If another call to si_cs_recv() failed, and we subscribed to |
| 1146 | * recv events already, give up now. |
| 1147 | */ |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 1148 | if (si->wait_event.events & SUB_RETRY_RECV) |
Olivier Houchard | f653528 | 2018-08-31 17:29:12 +0200 | [diff] [blame] | 1149 | return 0; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1150 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1151 | /* maybe we were called immediately after an asynchronous shutr */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1152 | if (ic->flags & CF_SHUTR) |
Olivier Houchard | c2aa711 | 2018-09-11 18:27:21 +0200 | [diff] [blame] | 1153 | return 1; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1154 | |
Willy Tarreau | 54e917c | 2017-08-30 07:35:35 +0200 | [diff] [blame] | 1155 | /* stop here if we reached the end of data */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1156 | if (cs->flags & CS_FL_EOS) |
Willy Tarreau | 54e917c | 2017-08-30 07:35:35 +0200 | [diff] [blame] | 1157 | goto out_shutdown_r; |
| 1158 | |
Christopher Faulet | f061e42 | 2018-12-07 14:51:20 +0100 | [diff] [blame] | 1159 | /* stop immediately on errors. Note that we DON'T want to stop on |
| 1160 | * POLL_ERR, as the poller might report a write error while there |
| 1161 | * are still data available in the recv buffer. This typically |
| 1162 | * happens when we send too large a request to a backend server |
| 1163 | * which rejects it before reading it all. |
| 1164 | */ |
| 1165 | if (!(cs->flags & CS_FL_RCV_MORE)) { |
| 1166 | if (!conn_xprt_ready(conn)) |
| 1167 | return 0; |
| 1168 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) |
| 1169 | return 1; // We want to make sure si_cs_wake() is called, so that process_strema is woken up, on failure |
| 1170 | } |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 1171 | |
Willy Tarreau | 7ab99a3 | 2018-12-18 09:15:43 +0100 | [diff] [blame] | 1172 | /* prepare to detect if the mux needs more room */ |
| 1173 | cs->flags &= ~CS_FL_WANT_ROOM; |
| 1174 | |
Willy Tarreau | 77e478c | 2018-06-19 07:03:14 +0200 | [diff] [blame] | 1175 | if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !co_data(ic) && |
Willy Tarreau | 7e31273 | 2014-02-12 16:35:14 +0100 | [diff] [blame] | 1176 | global.tune.idle_timer && |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1177 | (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1178 | /* The buffer was empty and nothing was transferred for more |
| 1179 | * than one second. This was caused by a pause and not by |
| 1180 | * congestion. Reset any streaming mode to reduce latency. |
| 1181 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1182 | ic->xfer_small = 0; |
| 1183 | ic->xfer_large = 0; |
| 1184 | ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1185 | } |
| 1186 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1187 | /* First, let's see if we may splice data across the channel without |
| 1188 | * using a buffer. |
| 1189 | */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1190 | if (conn->xprt->rcv_pipe && conn->mux->rcv_pipe && |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1191 | (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) && |
| 1192 | ic->flags & CF_KERN_SPLICING) { |
Willy Tarreau | d760eec | 2018-07-10 09:50:25 +0200 | [diff] [blame] | 1193 | if (c_data(ic)) { |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1194 | /* We're embarrassed, there are already data pending in |
| 1195 | * the buffer and we don't want to have them at two |
| 1196 | * locations at a time. Let's indicate we need some |
| 1197 | * place and ask the consumer to hurry. |
| 1198 | */ |
Christopher Faulet | c6618d6 | 2018-10-11 15:56:04 +0200 | [diff] [blame] | 1199 | flags |= CO_RFL_BUF_FLUSH; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1200 | goto abort_splice; |
| 1201 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1202 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1203 | if (unlikely(ic->pipe == NULL)) { |
| 1204 | if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) { |
| 1205 | ic->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1206 | goto abort_splice; |
| 1207 | } |
| 1208 | } |
| 1209 | |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1210 | ret = conn->mux->rcv_pipe(cs, ic->pipe, ic->to_forward); |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1211 | if (ret < 0) { |
| 1212 | /* splice not supported on this end, let's disable it */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1213 | ic->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1214 | goto abort_splice; |
| 1215 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1216 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1217 | if (ret > 0) { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1218 | if (ic->to_forward != CHN_INFINITE_FORWARD) |
| 1219 | ic->to_forward -= ret; |
| 1220 | ic->total += ret; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1221 | cur_read += ret; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1222 | ic->flags |= CF_READ_PARTIAL; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1223 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1224 | |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1225 | if (cs->flags & CS_FL_EOS) |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1226 | goto out_shutdown_r; |
| 1227 | |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 1228 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) |
Olivier Houchard | c2aa711 | 2018-09-11 18:27:21 +0200 | [diff] [blame] | 1229 | return 1; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1230 | |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1231 | if (conn->flags & CO_FL_WAIT_ROOM) { |
| 1232 | /* the pipe is full or we have read enough data that it |
| 1233 | * could soon be full. Let's stop before needing to poll. |
| 1234 | */ |
Willy Tarreau | db39843 | 2018-11-15 11:08:52 +0100 | [diff] [blame] | 1235 | si_rx_room_blk(si); |
Willy Tarreau | ffb1205 | 2018-11-15 16:06:02 +0100 | [diff] [blame] | 1236 | goto done_recv; |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1237 | } |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1238 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1239 | /* splice not possible (anymore), let's go on on standard copy */ |
| 1240 | } |
Willy Tarreau | 81464b4 | 2018-11-15 15:52:53 +0100 | [diff] [blame] | 1241 | else { |
| 1242 | /* be sure not to block regular receive path below */ |
| 1243 | conn->flags &= ~CO_FL_WAIT_ROOM; |
| 1244 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1245 | |
| 1246 | abort_splice: |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1247 | if (ic->pipe && unlikely(!ic->pipe->data)) { |
| 1248 | put_pipe(ic->pipe); |
| 1249 | ic->pipe = NULL; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1250 | } |
| 1251 | |
Christopher Faulet | a73e59b | 2016-12-09 17:30:18 +0100 | [diff] [blame] | 1252 | /* now we'll need a input buffer for the stream */ |
Willy Tarreau | 581abd3 | 2018-10-25 10:21:41 +0200 | [diff] [blame] | 1253 | if (!si_alloc_ibuf(si, &(si_strm(si)->buffer_wait))) |
Willy Tarreau | 10fc09e | 2014-11-25 19:46:36 +0100 | [diff] [blame] | 1254 | goto end_recv; |
Willy Tarreau | 10fc09e | 2014-11-25 19:46:36 +0100 | [diff] [blame] | 1255 | |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1256 | /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling |
| 1257 | * was enabled, which implies that the recv buffer was not full. So we have a guarantee |
| 1258 | * that if such an event is not handled above in splice, it will be handled here by |
| 1259 | * recv(). |
| 1260 | */ |
Olivier Houchard | c490efd | 2018-12-04 15:46:16 +0100 | [diff] [blame] | 1261 | while ((cs->flags & CS_FL_RCV_MORE) || |
| 1262 | (!(conn->flags & (CO_FL_ERROR | CO_FL_WAIT_ROOM | CO_FL_HANDSHAKE)) && |
| 1263 | (!(cs->flags & (CS_FL_ERROR|CS_FL_EOS))) && !(ic->flags & CF_SHUTR))) { |
Christopher Faulet | 4eb7d74 | 2018-10-11 15:29:21 +0200 | [diff] [blame] | 1264 | /* <max> may be null. This is the mux responsibility to set |
| 1265 | * CS_FL_RCV_MORE on the CS if more space is needed. |
| 1266 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1267 | max = channel_recv_max(ic); |
Christopher Faulet | 72d9125 | 2018-10-17 11:08:23 +0200 | [diff] [blame] | 1268 | ret = cs->conn->mux->rcv_buf(cs, &ic->buf, max, |
| 1269 | flags | |
| 1270 | (co_data(ic) ? CO_RFL_BUF_WET : 0) | |
| 1271 | ((channel_recv_limit(ic) < b_size(&ic->buf)) ? CO_RFL_KEEP_RSV : 0)); |
Willy Tarreau | 674e0ad | 2018-12-05 13:45:41 +0100 | [diff] [blame] | 1272 | |
Olivier Houchard | d247be0 | 2018-12-06 16:22:29 +0100 | [diff] [blame] | 1273 | if (cs->flags & CS_FL_WANT_ROOM) |
Willy Tarreau | db39843 | 2018-11-15 11:08:52 +0100 | [diff] [blame] | 1274 | si_rx_room_blk(si); |
Willy Tarreau | 6577b48 | 2017-12-10 21:19:33 +0100 | [diff] [blame] | 1275 | |
Christopher Faulet | effc375 | 2018-10-31 08:53:54 +0100 | [diff] [blame] | 1276 | if (cs->flags & CS_FL_READ_PARTIAL) { |
| 1277 | if (tick_isset(ic->rex)) |
| 1278 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
| 1279 | cs->flags &= ~CS_FL_READ_PARTIAL; |
| 1280 | } |
| 1281 | |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 1282 | if (ret <= 0) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1283 | break; |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 1284 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1285 | |
| 1286 | cur_read += ret; |
| 1287 | |
| 1288 | /* if we're allowed to directly forward data, we must update ->o */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1289 | if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1290 | unsigned long fwd = ret; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1291 | if (ic->to_forward != CHN_INFINITE_FORWARD) { |
| 1292 | if (fwd > ic->to_forward) |
| 1293 | fwd = ic->to_forward; |
| 1294 | ic->to_forward -= fwd; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1295 | } |
Willy Tarreau | bcbd393 | 2018-06-06 07:13:22 +0200 | [diff] [blame] | 1296 | c_adv(ic, fwd); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1297 | } |
| 1298 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1299 | ic->flags |= CF_READ_PARTIAL; |
| 1300 | ic->total += ret; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1301 | |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 1302 | if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0) { |
| 1303 | /* we're stopped by the channel's policy */ |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 1304 | si_rx_chan_blk(si); |
Willy Tarreau | 62dd698 | 2017-11-18 11:26:20 +0100 | [diff] [blame] | 1305 | break; |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 1306 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1307 | |
| 1308 | /* if too many bytes were missing from last read, it means that |
| 1309 | * it's pointless trying to read again because the system does |
| 1310 | * not have them in buffers. |
| 1311 | */ |
| 1312 | if (ret < max) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1313 | /* if a streamer has read few data, it may be because we |
| 1314 | * have exhausted system buffers. It's not worth trying |
| 1315 | * again. |
| 1316 | */ |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 1317 | if (ic->flags & CF_STREAMER) { |
| 1318 | /* we're stopped by the channel's policy */ |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 1319 | si_rx_chan_blk(si); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1320 | break; |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 1321 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1322 | |
| 1323 | /* if we read a large block smaller than what we requested, |
| 1324 | * it's almost certain we'll never get anything more. |
| 1325 | */ |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 1326 | if (ret >= global.tune.recv_enough) { |
| 1327 | /* we're stopped by the channel's policy */ |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 1328 | si_rx_chan_blk(si); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1329 | break; |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 1330 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1331 | } |
Christopher Faulet | b3e0de4 | 2018-10-11 13:54:13 +0200 | [diff] [blame] | 1332 | |
| 1333 | /* if we are waiting for more space, don't try to read more data |
| 1334 | * right now. |
| 1335 | */ |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 1336 | if (si_rx_blocked(si)) |
Christopher Faulet | b3e0de4 | 2018-10-11 13:54:13 +0200 | [diff] [blame] | 1337 | break; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1338 | } /* while !flags */ |
| 1339 | |
Willy Tarreau | ffb1205 | 2018-11-15 16:06:02 +0100 | [diff] [blame] | 1340 | done_recv: |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1341 | if (cur_read) { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1342 | if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1343 | (cur_read <= ic->buf.size / 2)) { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1344 | ic->xfer_large = 0; |
| 1345 | ic->xfer_small++; |
| 1346 | if (ic->xfer_small >= 3) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1347 | /* we have read less than half of the buffer in |
| 1348 | * one pass, and this happened at least 3 times. |
| 1349 | * This is definitely not a streamer. |
| 1350 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1351 | ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1352 | } |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1353 | else if (ic->xfer_small >= 2) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1354 | /* if the buffer has been at least half full twice, |
| 1355 | * we receive faster than we send, so at least it |
| 1356 | * is not a "fast streamer". |
| 1357 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1358 | ic->flags &= ~CF_STREAMER_FAST; |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1359 | } |
| 1360 | } |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1361 | else if (!(ic->flags & CF_STREAMER_FAST) && |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1362 | (cur_read >= ic->buf.size - global.tune.maxrewrite)) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1363 | /* we read a full buffer at once */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1364 | ic->xfer_small = 0; |
| 1365 | ic->xfer_large++; |
| 1366 | if (ic->xfer_large >= 3) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1367 | /* we call this buffer a fast streamer if it manages |
| 1368 | * to be filled in one call 3 consecutive times. |
| 1369 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1370 | ic->flags |= (CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1371 | } |
| 1372 | } |
| 1373 | else { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1374 | ic->xfer_small = 0; |
| 1375 | ic->xfer_large = 0; |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1376 | } |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1377 | ic->last_read = now_ms; |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1378 | } |
| 1379 | |
Willy Tarreau | 10fc09e | 2014-11-25 19:46:36 +0100 | [diff] [blame] | 1380 | end_recv: |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 1381 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) |
Olivier Houchard | c2aa711 | 2018-09-11 18:27:21 +0200 | [diff] [blame] | 1382 | return 1; |
Willy Tarreau | 10fc09e | 2014-11-25 19:46:36 +0100 | [diff] [blame] | 1383 | |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1384 | if (cs->flags & CS_FL_EOS) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1385 | /* connection closed */ |
| 1386 | goto out_shutdown_r; |
| 1387 | |
Willy Tarreau | 32742fd | 2018-11-14 14:07:59 +0100 | [diff] [blame] | 1388 | /* Subscribe to receive events if we're blocking on I/O */ |
Willy Tarreau | dd5621a | 2018-11-15 16:55:14 +0100 | [diff] [blame] | 1389 | if (!si_rx_blocked(si)) { |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 1390 | conn->mux->subscribe(cs, SUB_RETRY_RECV, &si->wait_event); |
Willy Tarreau | dd5621a | 2018-11-15 16:55:14 +0100 | [diff] [blame] | 1391 | si_rx_endp_done(si); |
| 1392 | } else { |
| 1393 | si_rx_endp_more(si); |
| 1394 | } |
Olivier Houchard | f653528 | 2018-08-31 17:29:12 +0200 | [diff] [blame] | 1395 | |
Willy Tarreau | 32742fd | 2018-11-14 14:07:59 +0100 | [diff] [blame] | 1396 | return (cur_read != 0) || si_rx_blocked(si); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1397 | |
| 1398 | out_shutdown_r: |
Olivier Houchard | fd0c2dc | 2018-12-13 15:38:16 +0100 | [diff] [blame] | 1399 | if (conn->flags & CO_FL_CONNECTED) { |
| 1400 | /* we received a shutdown */ |
| 1401 | ic->flags |= CF_READ_NULL; |
| 1402 | if (ic->flags & CF_AUTO_CLOSE) |
| 1403 | channel_shutw_now(ic); |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 1404 | stream_int_read0(si); |
Olivier Houchard | fd0c2dc | 2018-12-13 15:38:16 +0100 | [diff] [blame] | 1405 | } |
Olivier Houchard | c2aa711 | 2018-09-11 18:27:21 +0200 | [diff] [blame] | 1406 | return 1; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1407 | } |
| 1408 | |
| 1409 | /* |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1410 | * This function propagates a null read received on a socket-based connection. |
| 1411 | * It updates the stream interface. If the stream interface has SI_FL_NOHALF, |
Willy Tarreau | 1140512 | 2015-03-12 22:32:27 +0100 | [diff] [blame] | 1412 | * the close is also forwarded to the write side as an abort. |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1413 | */ |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 1414 | static void stream_int_read0(struct stream_interface *si) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1415 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1416 | struct conn_stream *cs = __objt_cs(si->end); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1417 | struct channel *ic = si_ic(si); |
| 1418 | struct channel *oc = si_oc(si); |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1419 | |
Willy Tarreau | abb5d42 | 2018-11-14 16:58:52 +0100 | [diff] [blame] | 1420 | si_rx_shut_blk(si); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1421 | ic->flags &= ~CF_SHUTR_NOW; |
| 1422 | if (ic->flags & CF_SHUTR) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1423 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1424 | ic->flags |= CF_SHUTR; |
| 1425 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1426 | |
| 1427 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
| 1428 | return; |
| 1429 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1430 | if (oc->flags & CF_SHUTW) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1431 | goto do_close; |
| 1432 | |
| 1433 | if (si->flags & SI_FL_NOHALF) { |
| 1434 | /* we want to immediately forward this close to the write side */ |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 1435 | /* force flag on ssl to keep stream in cache */ |
Willy Tarreau | ecdb3fe | 2017-10-05 15:25:48 +0200 | [diff] [blame] | 1436 | cs_shutw(cs, CS_SHW_SILENT); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1437 | goto do_close; |
| 1438 | } |
| 1439 | |
| 1440 | /* otherwise that's just a normal read shutdown */ |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1441 | return; |
| 1442 | |
| 1443 | do_close: |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1444 | /* OK we completely close the socket here just as if we went through si_shut[rw]() */ |
Willy Tarreau | a553ae9 | 2017-10-05 18:52:17 +0200 | [diff] [blame] | 1445 | cs_close(cs); |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1446 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1447 | oc->flags &= ~CF_SHUTW_NOW; |
| 1448 | oc->flags |= CF_SHUTW; |
| 1449 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1450 | |
Willy Tarreau | 43e69dc | 2018-11-06 19:23:03 +0100 | [diff] [blame] | 1451 | si_done_get(si); |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1452 | |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1453 | si->state = SI_ST_DIS; |
| 1454 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1455 | return; |
| 1456 | } |
| 1457 | |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 1458 | /* Callback to be used by applet handlers upon completion. It updates the stream |
| 1459 | * (which may or may not take this opportunity to try to forward data), then |
Emeric Brun | 2802b07 | 2017-06-30 14:11:56 +0200 | [diff] [blame] | 1460 | * may re-enable the applet's based on the channels and stream interface's final |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 1461 | * states. |
| 1462 | */ |
Willy Tarreau | aa977ba | 2015-09-25 11:45:06 +0200 | [diff] [blame] | 1463 | void si_applet_wake_cb(struct stream_interface *si) |
Willy Tarreau | e5f8649 | 2015-04-19 15:16:35 +0200 | [diff] [blame] | 1464 | { |
Willy Tarreau | eca572f | 2015-09-25 19:11:55 +0200 | [diff] [blame] | 1465 | struct channel *ic = si_ic(si); |
| 1466 | |
| 1467 | /* If the applet wants to write and the channel is closed, it's a |
| 1468 | * broken pipe and it must be reported. |
| 1469 | */ |
Willy Tarreau | 05b9b64 | 2018-11-14 13:43:35 +0100 | [diff] [blame] | 1470 | if (!(si->flags & SI_FL_RX_WAIT_EP) && (ic->flags & CF_SHUTR)) |
Willy Tarreau | eca572f | 2015-09-25 19:11:55 +0200 | [diff] [blame] | 1471 | si->flags |= SI_FL_ERR; |
| 1472 | |
Willy Tarreau | 186dcdd | 2018-11-16 16:18:34 +0100 | [diff] [blame] | 1473 | /* automatically mark the applet having data available if it reported |
| 1474 | * begin blocked by the channel. |
| 1475 | */ |
| 1476 | if (si_rx_blocked(si)) |
| 1477 | si_rx_endp_more(si); |
| 1478 | |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 1479 | /* update the stream-int, channels, and possibly wake the stream up */ |
| 1480 | stream_int_notify(si); |
Willy Tarreau | e5f8649 | 2015-04-19 15:16:35 +0200 | [diff] [blame] | 1481 | |
Willy Tarreau | 32742fd | 2018-11-14 14:07:59 +0100 | [diff] [blame] | 1482 | /* stream_int_notify may have passed through chk_snd and released some |
| 1483 | * RXBLK flags. Process_stream will consider those flags to wake up the |
| 1484 | * appctx but in the case the task is not in runqueue we may have to |
| 1485 | * wakeup the appctx immediately. |
Emeric Brun | 2802b07 | 2017-06-30 14:11:56 +0200 | [diff] [blame] | 1486 | */ |
Willy Tarreau | d0d40eb | 2018-11-09 14:56:01 +0100 | [diff] [blame] | 1487 | if (!task_in_rq(si_task(si)) && |
Willy Tarreau | 32742fd | 2018-11-14 14:07:59 +0100 | [diff] [blame] | 1488 | ((si_rx_endp_ready(si) && !si_rx_blocked(si)) || |
| 1489 | (si_tx_endp_ready(si) && !si_tx_blocked(si)))) |
Willy Tarreau | 563cc37 | 2015-04-19 18:13:56 +0200 | [diff] [blame] | 1490 | appctx_wakeup(si_appctx(si)); |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1491 | } |
| 1492 | |
| 1493 | /* |
| 1494 | * This function performs a shutdown-read on a stream interface attached to an |
| 1495 | * applet in a connected or init state (it does nothing for other states). It |
| 1496 | * either shuts the read side or marks itself as closed. The buffer flags are |
| 1497 | * updated to reflect the new state. If the stream interface has SI_FL_NOHALF, |
| 1498 | * we also forward the close to the write side. The owner task is woken up if |
| 1499 | * it exists. |
| 1500 | */ |
| 1501 | static void stream_int_shutr_applet(struct stream_interface *si) |
| 1502 | { |
| 1503 | struct channel *ic = si_ic(si); |
| 1504 | |
Willy Tarreau | abb5d42 | 2018-11-14 16:58:52 +0100 | [diff] [blame] | 1505 | si_rx_shut_blk(si); |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1506 | ic->flags &= ~CF_SHUTR_NOW; |
| 1507 | if (ic->flags & CF_SHUTR) |
| 1508 | return; |
| 1509 | ic->flags |= CF_SHUTR; |
| 1510 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1511 | |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1512 | /* Note: on shutr, we don't call the applet */ |
| 1513 | |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1514 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
| 1515 | return; |
| 1516 | |
| 1517 | if (si_oc(si)->flags & CF_SHUTW) { |
Willy Tarreau | 958f074 | 2015-09-25 20:24:26 +0200 | [diff] [blame] | 1518 | si_applet_release(si); |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1519 | si->state = SI_ST_DIS; |
| 1520 | si->exp = TICK_ETERNITY; |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1521 | } |
| 1522 | else if (si->flags & SI_FL_NOHALF) { |
| 1523 | /* we want to immediately forward this close to the write side */ |
| 1524 | return stream_int_shutw_applet(si); |
| 1525 | } |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1526 | } |
| 1527 | |
| 1528 | /* |
| 1529 | * This function performs a shutdown-write on a stream interface attached to an |
| 1530 | * applet in a connected or init state (it does nothing for other states). It |
| 1531 | * either shuts the write side or marks itself as closed. The buffer flags are |
| 1532 | * updated to reflect the new state. It does also close everything if the SI |
| 1533 | * was marked as being in error state. The owner task is woken up if it exists. |
| 1534 | */ |
| 1535 | static void stream_int_shutw_applet(struct stream_interface *si) |
| 1536 | { |
| 1537 | struct channel *ic = si_ic(si); |
| 1538 | struct channel *oc = si_oc(si); |
| 1539 | |
| 1540 | oc->flags &= ~CF_SHUTW_NOW; |
| 1541 | if (oc->flags & CF_SHUTW) |
| 1542 | return; |
| 1543 | oc->flags |= CF_SHUTW; |
| 1544 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | 43e69dc | 2018-11-06 19:23:03 +0100 | [diff] [blame] | 1545 | si_done_get(si); |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1546 | |
Hongbo Long | e39683c | 2017-03-10 18:41:51 +0100 | [diff] [blame] | 1547 | if (tick_isset(si->hcto)) { |
| 1548 | ic->rto = si->hcto; |
| 1549 | ic->rex = tick_add(now_ms, ic->rto); |
| 1550 | } |
| 1551 | |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1552 | /* on shutw we always wake the applet up */ |
| 1553 | appctx_wakeup(si_appctx(si)); |
| 1554 | |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1555 | switch (si->state) { |
| 1556 | case SI_ST_EST: |
| 1557 | /* we have to shut before closing, otherwise some short messages |
| 1558 | * may never leave the system, especially when there are remaining |
| 1559 | * unread data in the socket input buffer, or when nolinger is set. |
| 1560 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 1561 | * no risk so we close both sides immediately. |
| 1562 | */ |
| 1563 | if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) && |
| 1564 | !(ic->flags & (CF_SHUTR|CF_DONT_READ))) |
| 1565 | return; |
| 1566 | |
| 1567 | /* fall through */ |
| 1568 | case SI_ST_CON: |
| 1569 | case SI_ST_CER: |
| 1570 | case SI_ST_QUE: |
| 1571 | case SI_ST_TAR: |
| 1572 | /* Note that none of these states may happen with applets */ |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1573 | si_applet_release(si); |
Willy Tarreau | 958f074 | 2015-09-25 20:24:26 +0200 | [diff] [blame] | 1574 | si->state = SI_ST_DIS; |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1575 | default: |
Willy Tarreau | abb5d42 | 2018-11-14 16:58:52 +0100 | [diff] [blame] | 1576 | si->flags &= ~SI_FL_NOLINGER; |
| 1577 | si_rx_shut_blk(si); |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1578 | ic->flags &= ~CF_SHUTR_NOW; |
| 1579 | ic->flags |= CF_SHUTR; |
| 1580 | ic->rex = TICK_ETERNITY; |
| 1581 | si->exp = TICK_ETERNITY; |
| 1582 | } |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1583 | } |
| 1584 | |
| 1585 | /* chk_rcv function for applets */ |
| 1586 | static void stream_int_chk_rcv_applet(struct stream_interface *si) |
| 1587 | { |
| 1588 | struct channel *ic = si_ic(si); |
| 1589 | |
| 1590 | DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n", |
| 1591 | __FUNCTION__, |
| 1592 | si, si->state, ic->flags, si_oc(si)->flags); |
| 1593 | |
Christopher Faulet | b3e0de4 | 2018-10-11 13:54:13 +0200 | [diff] [blame] | 1594 | if (!ic->pipe) { |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1595 | /* (re)start reading */ |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1596 | appctx_wakeup(si_appctx(si)); |
Thierry FOURNIER | 5bc2cbf | 2015-09-04 18:40:36 +0200 | [diff] [blame] | 1597 | } |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1598 | } |
| 1599 | |
| 1600 | /* chk_snd function for applets */ |
| 1601 | static void stream_int_chk_snd_applet(struct stream_interface *si) |
| 1602 | { |
| 1603 | struct channel *oc = si_oc(si); |
| 1604 | |
| 1605 | DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n", |
| 1606 | __FUNCTION__, |
| 1607 | si, si->state, si_ic(si)->flags, oc->flags); |
| 1608 | |
| 1609 | if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW))) |
| 1610 | return; |
| 1611 | |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1612 | /* we only wake the applet up if it was waiting for some data */ |
| 1613 | |
| 1614 | if (!(si->flags & SI_FL_WAIT_DATA)) |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1615 | return; |
| 1616 | |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1617 | if (!tick_isset(oc->wex)) |
| 1618 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
| 1619 | |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1620 | if (!channel_is_empty(oc)) { |
| 1621 | /* (re)start sending */ |
| 1622 | appctx_wakeup(si_appctx(si)); |
| 1623 | } |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1624 | } |
| 1625 | |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 1626 | /* |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 1627 | * Local variables: |
| 1628 | * c-indent-level: 8 |
| 1629 | * c-basic-offset: 8 |
| 1630 | * End: |
| 1631 | */ |