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 | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 41 | /* socket functions used when running a stream interface as a task */ |
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 | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 46 | static void stream_int_shutr_conn(struct stream_interface *si); |
| 47 | static void stream_int_shutw_conn(struct stream_interface *si); |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 48 | static void stream_int_chk_rcv_conn(struct stream_interface *si); |
| 49 | static void stream_int_chk_snd_conn(struct stream_interface *si); |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 50 | static void stream_int_shutr_applet(struct stream_interface *si); |
| 51 | static void stream_int_shutw_applet(struct stream_interface *si); |
| 52 | static void stream_int_chk_rcv_applet(struct stream_interface *si); |
| 53 | static void stream_int_chk_snd_applet(struct stream_interface *si); |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 54 | static void si_cs_recv_cb(struct conn_stream *cs); |
| 55 | static void si_cs_send_cb(struct conn_stream *cs); |
| 56 | static int si_cs_wake_cb(struct conn_stream *cs); |
| 57 | static int si_idle_conn_wake_cb(struct conn_stream *cs); |
| 58 | static void si_idle_conn_null_cb(struct conn_stream *cs); |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 59 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 60 | /* stream-interface operations for embedded tasks */ |
| 61 | struct si_ops si_embedded_ops = { |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 62 | .chk_rcv = stream_int_chk_rcv, |
| 63 | .chk_snd = stream_int_chk_snd, |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 64 | .shutr = stream_int_shutr, |
| 65 | .shutw = stream_int_shutw, |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 66 | }; |
| 67 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 68 | /* stream-interface operations for connections */ |
| 69 | struct si_ops si_conn_ops = { |
| 70 | .update = stream_int_update_conn, |
| 71 | .chk_rcv = stream_int_chk_rcv_conn, |
| 72 | .chk_snd = stream_int_chk_snd_conn, |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 73 | .shutr = stream_int_shutr_conn, |
| 74 | .shutw = stream_int_shutw_conn, |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 75 | }; |
| 76 | |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 77 | /* stream-interface operations for connections */ |
| 78 | struct si_ops si_applet_ops = { |
| 79 | .update = stream_int_update_applet, |
| 80 | .chk_rcv = stream_int_chk_rcv_applet, |
| 81 | .chk_snd = stream_int_chk_snd_applet, |
| 82 | .shutr = stream_int_shutr_applet, |
| 83 | .shutw = stream_int_shutw_applet, |
| 84 | }; |
| 85 | |
Willy Tarreau | 74beec3 | 2012-10-03 00:41:04 +0200 | [diff] [blame] | 86 | struct data_cb si_conn_cb = { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 87 | .recv = si_cs_recv_cb, |
| 88 | .send = si_cs_send_cb, |
| 89 | .wake = si_cs_wake_cb, |
Willy Tarreau | 8e0bb0a | 2016-11-24 16:58:12 +0100 | [diff] [blame] | 90 | .name = "STRM", |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 91 | }; |
| 92 | |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 93 | struct data_cb si_idle_conn_cb = { |
| 94 | .recv = si_idle_conn_null_cb, |
| 95 | .send = si_idle_conn_null_cb, |
| 96 | .wake = si_idle_conn_wake_cb, |
Willy Tarreau | 8e0bb0a | 2016-11-24 16:58:12 +0100 | [diff] [blame] | 97 | .name = "IDLE", |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 98 | }; |
| 99 | |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 100 | /* |
| 101 | * This function only has to be called once after a wakeup event in case of |
| 102 | * suspected timeout. It controls the stream interface timeouts and sets |
| 103 | * si->flags accordingly. It does NOT close anything, as this timeout may |
| 104 | * be used for any purpose. It returns 1 if the timeout fired, otherwise |
| 105 | * zero. |
| 106 | */ |
| 107 | int stream_int_check_timeouts(struct stream_interface *si) |
| 108 | { |
| 109 | if (tick_is_expired(si->exp, now_ms)) { |
| 110 | si->flags |= SI_FL_EXP; |
| 111 | return 1; |
| 112 | } |
| 113 | return 0; |
| 114 | } |
| 115 | |
Willy Tarreau | fe3718a | 2008-11-30 18:14:12 +0100 | [diff] [blame] | 116 | /* to be called only when in SI_ST_DIS with SI_FL_ERR */ |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 117 | void stream_int_report_error(struct stream_interface *si) |
| 118 | { |
| 119 | if (!si->err_type) |
| 120 | si->err_type = SI_ET_DATA_ERR; |
| 121 | |
Willy Tarreau | 2bb4a96 | 2014-11-28 11:11:05 +0100 | [diff] [blame] | 122 | si_oc(si)->flags |= CF_WRITE_ERROR; |
| 123 | si_ic(si)->flags |= CF_READ_ERROR; |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | /* |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 127 | * Returns a message to the client ; the connection is shut down for read, |
| 128 | * and the request is cleared so that no server connection can be initiated. |
| 129 | * The buffer is marked for read shutdown on the other side to protect the |
| 130 | * 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] | 131 | * "chunk". If it is null, then an empty message is used. The reply buffer does |
| 132 | * not need to be empty before this, and its contents will not be overwritten. |
| 133 | * 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] | 134 | */ |
Willy Tarreau | 83061a8 | 2018-07-13 11:56:34 +0200 | [diff] [blame] | 135 | void stream_int_retnclose(struct stream_interface *si, |
| 136 | const struct buffer *msg) |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 137 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 138 | struct channel *ic = si_ic(si); |
| 139 | struct channel *oc = si_oc(si); |
| 140 | |
| 141 | channel_auto_read(ic); |
| 142 | channel_abort(ic); |
| 143 | channel_auto_close(ic); |
| 144 | channel_erase(ic); |
| 145 | channel_truncate(oc); |
Willy Tarreau | 798e128 | 2010-12-12 13:06:00 +0100 | [diff] [blame] | 146 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 147 | if (likely(msg && msg->data)) |
| 148 | co_inject(oc, msg->area, msg->data); |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 149 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 150 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
| 151 | channel_auto_read(oc); |
| 152 | channel_auto_close(oc); |
| 153 | channel_shutr_now(oc); |
Willy Tarreau | 5d881d0 | 2009-12-27 22:51:06 +0100 | [diff] [blame] | 154 | } |
| 155 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 156 | /* |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 157 | * This function performs a shutdown-read on a detached stream interface in a |
| 158 | * connected or init state (it does nothing for other states). It either shuts |
| 159 | * the read side or marks itself as closed. The buffer flags are updated to |
| 160 | * reflect the new state. If the stream interface has SI_FL_NOHALF, we also |
| 161 | * 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] | 162 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 163 | static void stream_int_shutr(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 164 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 165 | struct channel *ic = si_ic(si); |
| 166 | |
| 167 | ic->flags &= ~CF_SHUTR_NOW; |
| 168 | if (ic->flags & CF_SHUTR) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 169 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 170 | ic->flags |= CF_SHUTR; |
| 171 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 172 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 173 | |
| 174 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 175 | return; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 176 | |
Willy Tarreau | 2bb4a96 | 2014-11-28 11:11:05 +0100 | [diff] [blame] | 177 | if (si_oc(si)->flags & CF_SHUTW) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 178 | si->state = SI_ST_DIS; |
| 179 | si->exp = TICK_ETERNITY; |
Willy Tarreau | d8ccffe | 2010-09-07 16:16:50 +0200 | [diff] [blame] | 180 | } |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 181 | else if (si->flags & SI_FL_NOHALF) { |
| 182 | /* we want to immediately forward this close to the write side */ |
| 183 | return stream_int_shutw(si); |
| 184 | } |
Willy Tarreau | 0bd05ea | 2010-07-02 11:18:03 +0200 | [diff] [blame] | 185 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 186 | /* 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] | 187 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 188 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 189 | } |
| 190 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 191 | /* |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 192 | * This function performs a shutdown-write on a detached stream interface in a |
| 193 | * connected or init state (it does nothing for other states). It either shuts |
| 194 | * the write side or marks itself as closed. The buffer flags are updated to |
| 195 | * reflect the new state. It does also close everything if the SI was marked as |
| 196 | * 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] | 197 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 198 | static void stream_int_shutw(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 199 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 200 | struct channel *ic = si_ic(si); |
| 201 | struct channel *oc = si_oc(si); |
| 202 | |
| 203 | oc->flags &= ~CF_SHUTW_NOW; |
| 204 | if (oc->flags & CF_SHUTW) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 205 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 206 | oc->flags |= CF_SHUTW; |
| 207 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 208 | si->flags &= ~SI_FL_WAIT_DATA; |
| 209 | |
Hongbo Long | e39683c | 2017-03-10 18:41:51 +0100 | [diff] [blame] | 210 | if (tick_isset(si->hcto)) { |
| 211 | ic->rto = si->hcto; |
| 212 | ic->rex = tick_add(now_ms, ic->rto); |
| 213 | } |
| 214 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 215 | switch (si->state) { |
| 216 | case SI_ST_EST: |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 217 | /* we have to shut before closing, otherwise some short messages |
| 218 | * may never leave the system, especially when there are remaining |
| 219 | * unread data in the socket input buffer, or when nolinger is set. |
| 220 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 221 | * no risk so we close both sides immediately. |
| 222 | */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 223 | if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) && |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 224 | !(ic->flags & (CF_SHUTR|CF_DONT_READ))) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 225 | return; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 226 | |
| 227 | /* fall through */ |
| 228 | case SI_ST_CON: |
| 229 | case SI_ST_CER: |
Willy Tarreau | 32d3ee9 | 2010-12-29 14:03:02 +0100 | [diff] [blame] | 230 | case SI_ST_QUE: |
| 231 | case SI_ST_TAR: |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 232 | /* Note that none of these states may happen with applets */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 233 | si->state = SI_ST_DIS; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 234 | default: |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 235 | si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 236 | ic->flags &= ~CF_SHUTR_NOW; |
| 237 | ic->flags |= CF_SHUTR; |
| 238 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 239 | si->exp = TICK_ETERNITY; |
| 240 | } |
| 241 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 242 | /* 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] | 243 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 244 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | /* default chk_rcv function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 248 | static void stream_int_chk_rcv(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 249 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 250 | struct channel *ic = si_ic(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 251 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 252 | 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] | 253 | __FUNCTION__, |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 254 | si, si->state, ic->flags, si_oc(si)->flags); |
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 | if (unlikely(si->state != SI_ST_EST || (ic->flags & (CF_SHUTR|CF_DONT_READ)))) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 257 | return; |
| 258 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 259 | if (!channel_may_recv(ic) || ic->pipe) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 260 | /* stop reading */ |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 261 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 262 | } |
| 263 | else { |
| 264 | /* (re)start reading */ |
| 265 | si->flags &= ~SI_FL_WAIT_ROOM; |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 266 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 267 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 268 | } |
| 269 | } |
| 270 | |
| 271 | /* default chk_snd function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 272 | static void stream_int_chk_snd(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 273 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 274 | struct channel *oc = si_oc(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 275 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 276 | 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] | 277 | __FUNCTION__, |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 278 | si, si->state, si_ic(si)->flags, oc->flags); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 279 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 280 | if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW))) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 281 | return; |
| 282 | |
| 283 | if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 284 | channel_is_empty(oc)) /* called with nothing to send ! */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 285 | return; |
| 286 | |
| 287 | /* Otherwise there are remaining data to be sent in the buffer, |
| 288 | * so we tell the handler. |
| 289 | */ |
| 290 | si->flags &= ~SI_FL_WAIT_DATA; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 291 | if (!tick_isset(oc->wex)) |
| 292 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 293 | |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 294 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 295 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 296 | } |
| 297 | |
Willy Tarreau | a9ff5e6 | 2015-07-19 18:46:30 +0200 | [diff] [blame] | 298 | /* Register an applet to handle a stream_interface as a new appctx. The SI will |
| 299 | * wake it up everytime it is solicited. The appctx must be deleted by the task |
| 300 | * handler using si_release_endpoint(), possibly from within the function itself. |
| 301 | * It also pre-initializes the applet's context and returns it (or NULL in case |
| 302 | * it could not be allocated). |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 303 | */ |
Willy Tarreau | 3057645 | 2015-04-13 13:50:30 +0200 | [diff] [blame] | 304 | struct appctx *stream_int_register_handler(struct stream_interface *si, struct applet *app) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 305 | { |
Willy Tarreau | 0a23bcb | 2013-12-01 11:31:38 +0100 | [diff] [blame] | 306 | struct appctx *appctx; |
| 307 | |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 308 | 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] | 309 | |
Willy Tarreau | a7513f5 | 2015-04-05 00:15:26 +0200 | [diff] [blame] | 310 | appctx = si_alloc_appctx(si, app); |
Willy Tarreau | a69fc9f | 2014-12-22 19:34:00 +0100 | [diff] [blame] | 311 | if (!appctx) |
Willy Tarreau | 0a23bcb | 2013-12-01 11:31:38 +0100 | [diff] [blame] | 312 | return NULL; |
| 313 | |
Willy Tarreau | fe12793 | 2015-04-21 19:23:39 +0200 | [diff] [blame] | 314 | si_applet_cant_get(si); |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 315 | appctx_wakeup(appctx); |
Willy Tarreau | 1fbe1c9 | 2013-12-01 09:35:41 +0100 | [diff] [blame] | 316 | return si_appctx(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 317 | } |
| 318 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 319 | /* 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] | 320 | * established. It returns 0 if it fails in a fatal way or needs to poll to go |
| 321 | * 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] | 322 | * flags (the bit is provided in <flag> by the caller). It is designed to be |
| 323 | * 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] | 324 | * Note that it can emit a PROXY line by relying on the other end's address |
| 325 | * when the connection is attached to a stream interface, or by resolving the |
| 326 | * local address otherwise (also called a LOCAL line). |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 327 | */ |
| 328 | int conn_si_send_proxy(struct connection *conn, unsigned int flag) |
| 329 | { |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 330 | /* we might have been called just after an asynchronous shutw */ |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 331 | if (conn->flags & CO_FL_SOCK_WR_SH) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 332 | goto out_error; |
| 333 | |
Willy Tarreau | d02cdd2 | 2013-12-15 10:23:20 +0100 | [diff] [blame] | 334 | if (!conn_ctrl_ready(conn)) |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 335 | goto out_error; |
| 336 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 337 | /* If we have a PROXY line to send, we'll use this to validate the |
| 338 | * connection, in which case the connection is validated only once |
| 339 | * we've sent the whole proxy line. Otherwise we use connect(). |
| 340 | */ |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 341 | while (conn->send_proxy_ofs) { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 342 | struct conn_stream *cs; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 343 | int ret; |
| 344 | |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 345 | cs = conn->mux_ctx; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 346 | /* The target server expects a PROXY line to be sent first. |
| 347 | * If the send_proxy_ofs is negative, it corresponds to the |
| 348 | * offset to start sending from then end of the proxy string |
| 349 | * (which is recomputed every time since it's constant). If |
| 350 | * it is positive, it means we have to send from the start. |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 351 | * We can only send a "normal" PROXY line when the connection |
| 352 | * is attached to a stream interface. Otherwise we can only |
| 353 | * send a LOCAL line (eg: for use with health checks). |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 354 | */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 355 | if (conn->mux == &mux_pt_ops && cs->data_cb == &si_conn_cb) { |
| 356 | struct stream_interface *si = cs->data; |
| 357 | struct conn_stream *remote_cs = objt_cs(si_opposite(si)->end); |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 358 | ret = make_proxy_line(trash.area, trash.size, |
| 359 | objt_server(conn->target), |
| 360 | remote_cs ? remote_cs->conn : NULL); |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 361 | } |
| 362 | else { |
| 363 | /* The target server expects a LOCAL line to be sent first. Retrieving |
| 364 | * local or remote addresses may fail until the connection is established. |
| 365 | */ |
| 366 | conn_get_from_addr(conn); |
| 367 | if (!(conn->flags & CO_FL_ADDR_FROM_SET)) |
| 368 | goto out_wait; |
| 369 | |
| 370 | conn_get_to_addr(conn); |
| 371 | if (!(conn->flags & CO_FL_ADDR_TO_SET)) |
| 372 | goto out_wait; |
| 373 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 374 | ret = make_proxy_line(trash.area, trash.size, |
| 375 | objt_server(conn->target), conn); |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 376 | } |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 377 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 378 | if (!ret) |
| 379 | goto out_error; |
| 380 | |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 381 | if (conn->send_proxy_ofs > 0) |
| 382 | conn->send_proxy_ofs = -ret; /* first call */ |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 383 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 384 | /* we have to send trash from (ret+sp for -sp bytes). If the |
| 385 | * data layer has a pending write, we'll also set MSG_MORE. |
| 386 | */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 387 | ret = conn_sock_send(conn, |
| 388 | trash.area + ret + conn->send_proxy_ofs, |
| 389 | -conn->send_proxy_ofs, |
Olivier Houchard | 1a0545f | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 390 | (conn->flags & CO_FL_XPRT_WR_ENA) ? MSG_MORE : 0); |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 391 | |
Willy Tarreau | 0a03c0f | 2015-03-13 00:05:28 +0100 | [diff] [blame] | 392 | if (ret < 0) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 393 | goto out_error; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 394 | |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 395 | conn->send_proxy_ofs += ret; /* becomes zero once complete */ |
| 396 | if (conn->send_proxy_ofs != 0) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 397 | goto out_wait; |
| 398 | |
| 399 | /* OK we've sent the whole line, we're connected */ |
Willy Tarreau | 7fe4569 | 2013-12-04 23:37:56 +0100 | [diff] [blame] | 400 | break; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 401 | } |
| 402 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 403 | /* The connection is ready now, simply return and let the connection |
| 404 | * handler notify upper layers if needed. |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 405 | */ |
| 406 | if (conn->flags & CO_FL_WAIT_L4_CONN) |
| 407 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 408 | conn->flags &= ~flag; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 409 | return 1; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 410 | |
| 411 | out_error: |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 412 | /* Write error on the file descriptor */ |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 413 | conn->flags |= CO_FL_ERROR; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 414 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 415 | |
| 416 | out_wait: |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 417 | __conn_sock_stop_recv(conn); |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 418 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 419 | } |
| 420 | |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 421 | |
| 422 | /* Tiny I/O callback called on recv/send I/O events on idle connections. |
| 423 | * It simply sets the CO_FL_SOCK_RD_SH flag so that si_idle_conn_wake_cb() |
| 424 | * is notified and can kill the connection. |
| 425 | */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 426 | static void si_idle_conn_null_cb(struct conn_stream *cs) |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 427 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 428 | conn_sock_drain(cs->conn); |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 429 | } |
| 430 | |
| 431 | /* Callback to be used by connection I/O handlers when some activity is detected |
| 432 | * on an idle server connection. Its main purpose is to kill the connection once |
| 433 | * a close was detected on it. It returns 0 if it did nothing serious, or -1 if |
| 434 | * it killed the connection. |
| 435 | */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 436 | static int si_idle_conn_wake_cb(struct conn_stream *cs) |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 437 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 438 | struct connection *conn = cs->conn; |
| 439 | struct stream_interface *si = cs->data; |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 440 | |
| 441 | if (!conn_ctrl_ready(conn)) |
| 442 | return 0; |
| 443 | |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 444 | if (conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH) || cs->flags & CS_FL_ERROR) { |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 445 | /* warning, we can't do anything on <conn> after this call ! */ |
Willy Tarreau | c4b56e4 | 2015-09-23 17:56:02 +0200 | [diff] [blame] | 446 | si_release_endpoint(si); |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 447 | return -1; |
| 448 | } |
| 449 | return 0; |
| 450 | } |
| 451 | |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 452 | /* This function is the equivalent to stream_int_update() except that it's |
| 453 | * designed to be called from outside the stream handlers, typically the lower |
| 454 | * layers (applets, connections) after I/O completion. After updating the stream |
| 455 | * interface and timeouts, it will try to forward what can be forwarded, then to |
| 456 | * wake the associated task up if an important event requires special handling. |
| 457 | * It should not be called from within the stream itself, stream_int_update() |
| 458 | * is designed for this. |
| 459 | */ |
| 460 | void stream_int_notify(struct stream_interface *si) |
| 461 | { |
| 462 | struct channel *ic = si_ic(si); |
| 463 | struct channel *oc = si_oc(si); |
| 464 | |
| 465 | /* process consumer side */ |
| 466 | if (channel_is_empty(oc)) { |
Olivier Houchard | e9bed53 | 2017-11-16 17:49:25 +0100 | [diff] [blame] | 467 | struct connection *conn = objt_cs(si->end) ? objt_cs(si->end)->conn : NULL; |
| 468 | |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 469 | if (((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) && |
Olivier Houchard | e9bed53 | 2017-11-16 17:49:25 +0100 | [diff] [blame] | 470 | (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] | 471 | si_shutw(si); |
| 472 | oc->wex = TICK_ETERNITY; |
| 473 | } |
| 474 | |
Willy Tarreau | 8cf9c8e | 2016-12-13 15:21:25 +0100 | [diff] [blame] | 475 | /* indicate that we may be waiting for data from the output channel or |
| 476 | * we're about to close and can't expect more data if SHUTW_NOW is there. |
| 477 | */ |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 478 | if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0 && channel_may_recv(oc)) |
| 479 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | 8cf9c8e | 2016-12-13 15:21:25 +0100 | [diff] [blame] | 480 | else if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) |
| 481 | si->flags &= ~SI_FL_WAIT_DATA; |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 482 | |
| 483 | /* update OC timeouts and wake the other side up if it's waiting for room */ |
| 484 | if (oc->flags & CF_WRITE_ACTIVITY) { |
| 485 | if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
| 486 | !channel_is_empty(oc)) |
| 487 | if (tick_isset(oc->wex)) |
| 488 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
| 489 | |
| 490 | if (!(si->flags & SI_FL_INDEP_STR)) |
| 491 | if (tick_isset(ic->rex)) |
| 492 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
| 493 | |
| 494 | if (likely((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL|CF_DONT_READ)) == CF_WRITE_PARTIAL && |
| 495 | channel_may_recv(oc) && |
| 496 | (si_opposite(si)->flags & SI_FL_WAIT_ROOM))) |
| 497 | si_chk_rcv(si_opposite(si)); |
| 498 | } |
| 499 | |
| 500 | /* Notify the other side when we've injected data into the IC that |
| 501 | * needs to be forwarded. We can do fast-forwarding as soon as there |
| 502 | * are output data, but we avoid doing this if some of the data are |
| 503 | * not yet scheduled for being forwarded, because it is very likely |
| 504 | * that it will be done again immediately afterwards once the following |
| 505 | * data are parsed (eg: HTTP chunking). We only SI_FL_WAIT_ROOM once |
| 506 | * we've emptied *some* of the output buffer, and not just when there |
| 507 | * is available room, because applets are often forced to stop before |
| 508 | * the buffer is full. We must not stop based on input data alone because |
| 509 | * an HTTP parser might need more data to complete the parsing. |
| 510 | */ |
Bin Wang | 95fad5b | 2017-09-15 14:56:40 +0800 | [diff] [blame] | 511 | |
| 512 | /* ensure it's only set if a write attempt has succeeded */ |
| 513 | ic->flags &= ~CF_WRITE_PARTIAL; |
| 514 | |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 515 | if (!channel_is_empty(ic) && |
| 516 | (si_opposite(si)->flags & SI_FL_WAIT_DATA) && |
Willy Tarreau | 77e478c | 2018-06-19 07:03:14 +0200 | [diff] [blame] | 517 | (ci_data(ic) == 0 || ic->pipe)) { |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 518 | int new_len, last_len; |
| 519 | |
Willy Tarreau | 77e478c | 2018-06-19 07:03:14 +0200 | [diff] [blame] | 520 | last_len = co_data(ic); |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 521 | if (ic->pipe) |
| 522 | last_len += ic->pipe->data; |
| 523 | |
| 524 | si_chk_snd(si_opposite(si)); |
| 525 | |
Willy Tarreau | 77e478c | 2018-06-19 07:03:14 +0200 | [diff] [blame] | 526 | new_len = co_data(ic); |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 527 | if (ic->pipe) |
| 528 | new_len += ic->pipe->data; |
| 529 | |
| 530 | /* check if the consumer has freed some space either in the |
| 531 | * buffer or in the pipe. |
| 532 | */ |
| 533 | if (channel_may_recv(ic) && new_len < last_len) |
| 534 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 535 | } |
| 536 | |
| 537 | if (si->flags & SI_FL_WAIT_ROOM) { |
| 538 | ic->rex = TICK_ETERNITY; |
| 539 | } |
| 540 | else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ)) == CF_READ_PARTIAL && |
| 541 | channel_may_recv(ic)) { |
| 542 | /* we must re-enable reading if si_chk_snd() has freed some space */ |
| 543 | if (!(ic->flags & CF_READ_NOEXP) && tick_isset(ic->rex)) |
| 544 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
| 545 | } |
| 546 | |
| 547 | /* wake the task up only when needed */ |
| 548 | if (/* changes on the production side */ |
| 549 | (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) || |
| 550 | si->state != SI_ST_EST || |
| 551 | (si->flags & SI_FL_ERR) || |
| 552 | ((ic->flags & CF_READ_PARTIAL) && |
| 553 | (!ic->to_forward || si_opposite(si)->state != SI_ST_EST)) || |
| 554 | |
| 555 | /* changes on the consumption side */ |
| 556 | (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) || |
Christopher Faulet | c5a9d5b | 2017-11-09 09:36:43 +0100 | [diff] [blame] | 557 | ((oc->flags & (CF_WRITE_ACTIVITY|CF_WRITE_EVENT)) && |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 558 | ((oc->flags & CF_SHUTW) || |
| 559 | ((oc->flags & CF_WAKE_WRITE) && |
| 560 | (si_opposite(si)->state != SI_ST_EST || |
| 561 | (channel_is_empty(oc) && !oc->to_forward)))))) { |
| 562 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
| 563 | } |
| 564 | if (ic->flags & CF_READ_ACTIVITY) |
| 565 | ic->flags &= ~CF_READ_DONTWAIT; |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 566 | } |
| 567 | |
| 568 | |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 569 | /* Callback to be used by connection I/O handlers upon completion. It propagates |
| 570 | * connection flags to the stream interface, updates the stream (which may or |
| 571 | * may not take this opportunity to try to forward data), then update the |
| 572 | * connection's polling based on the channels and stream interface's final |
| 573 | * states. The function always returns 0. |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 574 | */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 575 | static int si_cs_wake_cb(struct conn_stream *cs) |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 576 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 577 | struct connection *conn = cs->conn; |
| 578 | struct stream_interface *si = cs->data; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 579 | struct channel *ic = si_ic(si); |
| 580 | struct channel *oc = si_oc(si); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 581 | |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 582 | /* First step, report to the stream-int what was detected at the |
| 583 | * connection layer : errors and connection establishment. |
| 584 | */ |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 585 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) |
Willy Tarreau | 3c55ec2 | 2012-07-23 19:19:51 +0200 | [diff] [blame] | 586 | si->flags |= SI_FL_ERR; |
| 587 | |
Olivier Houchard | ccaa7de | 2017-10-02 11:51:03 +0200 | [diff] [blame] | 588 | /* If we had early data, and the handshake ended, then |
| 589 | * we can remove the flag, and attempt to wake the task up, |
| 590 | * in the event there's an analyser waiting for the end of |
| 591 | * the handshake. |
| 592 | */ |
Olivier Houchard | 6fa63d9 | 2017-11-27 18:41:32 +0100 | [diff] [blame] | 593 | if (!(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS)) && |
| 594 | (cs->flags & CS_FL_WAIT_FOR_HS)) { |
| 595 | cs->flags &= ~CS_FL_WAIT_FOR_HS; |
Olivier Houchard | ccaa7de | 2017-10-02 11:51:03 +0200 | [diff] [blame] | 596 | task_wakeup(si_task(si), TASK_WOKEN_MSG); |
| 597 | } |
| 598 | |
Willy Tarreau | 52821e2 | 2017-03-18 17:11:37 +0100 | [diff] [blame] | 599 | if ((si->state < SI_ST_EST) && |
| 600 | (conn->flags & (CO_FL_CONNECTED | CO_FL_HANDSHAKE)) == CO_FL_CONNECTED) { |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 601 | si->exp = TICK_ETERNITY; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 602 | oc->flags |= CF_WRITE_NULL; |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 603 | } |
| 604 | |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 605 | /* Second step : update the stream-int and channels, try to forward any |
| 606 | * pending data, then possibly wake the stream up based on the new |
| 607 | * stream-int status. |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 608 | */ |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 609 | stream_int_notify(si); |
Christopher Faulet | a73e59b | 2016-12-09 17:30:18 +0100 | [diff] [blame] | 610 | channel_release_buffer(ic, &(si_strm(si)->buffer_wait)); |
Willy Tarreau | ea3cc48 | 2015-09-23 19:37:00 +0200 | [diff] [blame] | 611 | |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 612 | /* Third step : update the connection's polling status based on what |
| 613 | * was done above (eg: maybe some buffers got emptied). |
| 614 | */ |
| 615 | if (channel_is_empty(oc)) |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 616 | __cs_stop_send(cs); |
Willy Tarreau | ea3cc48 | 2015-09-23 19:37:00 +0200 | [diff] [blame] | 617 | |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 618 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 619 | if (si->flags & SI_FL_WAIT_ROOM) { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 620 | __cs_stop_recv(cs); |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 621 | } |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 622 | else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ)) == CF_READ_PARTIAL && |
| 623 | channel_may_recv(ic)) { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 624 | __cs_want_recv(cs); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 625 | } |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 626 | return 0; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 627 | } |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 628 | |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 629 | /* |
| 630 | * This function is called to send buffer data to a stream socket. |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 631 | * It calls the mux layer's snd_buf function. It relies on the |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 632 | * caller to commit polling changes. The caller should check conn->flags |
| 633 | * for errors. |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 634 | */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 635 | static void si_cs_send(struct conn_stream *cs) |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 636 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 637 | struct connection *conn = cs->conn; |
| 638 | struct stream_interface *si = cs->data; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 639 | struct channel *oc = si_oc(si); |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 640 | int ret; |
| 641 | |
Bin Wang | 95fad5b | 2017-09-15 14:56:40 +0800 | [diff] [blame] | 642 | /* ensure it's only set if a write attempt has succeeded */ |
| 643 | oc->flags &= ~CF_WRITE_PARTIAL; |
| 644 | |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 645 | if (oc->pipe && conn->xprt->snd_pipe && conn->mux->snd_pipe) { |
| 646 | ret = conn->mux->snd_pipe(cs, oc->pipe); |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 647 | if (ret > 0) |
Christopher Faulet | c5a9d5b | 2017-11-09 09:36:43 +0100 | [diff] [blame] | 648 | oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA | CF_WRITE_EVENT; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 649 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 650 | if (!oc->pipe->data) { |
| 651 | put_pipe(oc->pipe); |
| 652 | oc->pipe = NULL; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 653 | } |
| 654 | |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 655 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 656 | return; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 657 | } |
| 658 | |
| 659 | /* At this point, the pipe is empty, but we may still have data pending |
| 660 | * in the normal buffer. |
| 661 | */ |
Willy Tarreau | 77e478c | 2018-06-19 07:03:14 +0200 | [diff] [blame] | 662 | if (!co_data(oc)) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 663 | return; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 664 | |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 665 | /* when we're here, we already know that there is no spliced |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 666 | * data left, and that there are sendable buffered data. |
| 667 | */ |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 668 | if (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_WR_SH | CO_FL_HANDSHAKE)) && |
| 669 | !(cs->flags & CS_FL_ERROR) && !(oc->flags & CF_SHUTW)) { |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 670 | /* check if we want to inform the kernel that we're interested in |
| 671 | * sending more data after this call. We want this if : |
| 672 | * - we're about to close after this last send and want to merge |
| 673 | * the ongoing FIN with the last segment. |
| 674 | * - we know we can't send everything at once and must get back |
| 675 | * here because of unaligned data |
| 676 | * - there is still a finite amount of data to forward |
| 677 | * The test is arranged so that the most common case does only 2 |
| 678 | * tests. |
| 679 | */ |
Willy Tarreau | 1049b1f | 2014-02-02 01:51:17 +0100 | [diff] [blame] | 680 | unsigned int send_flag = 0; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 681 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 682 | if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) && |
| 683 | ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) || |
Willy Tarreau | 4ac4928 | 2017-10-17 16:33:46 +0200 | [diff] [blame] | 684 | (oc->flags & CF_EXPECT_MORE))) || |
Willy Tarreau | ecd2e15 | 2017-11-07 15:07:25 +0100 | [diff] [blame] | 685 | ((oc->flags & CF_ISRESP) && |
| 686 | ((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] | 687 | send_flag |= CO_SFL_MSG_MORE; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 688 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 689 | if (oc->flags & CF_STREAMER) |
Willy Tarreau | 7bed945 | 2014-02-02 02:00:24 +0100 | [diff] [blame] | 690 | send_flag |= CO_SFL_STREAMER; |
| 691 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 692 | ret = conn->mux->snd_buf(cs, &oc->buf, co_data(oc), send_flag); |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 693 | if (ret > 0) { |
Christopher Faulet | c5a9d5b | 2017-11-09 09:36:43 +0100 | [diff] [blame] | 694 | oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA | CF_WRITE_EVENT; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 695 | |
Willy Tarreau | 77e478c | 2018-06-19 07:03:14 +0200 | [diff] [blame] | 696 | co_set_data(oc, co_data(oc) - ret); |
Willy Tarreau | deccd11 | 2018-06-14 18:38:55 +0200 | [diff] [blame] | 697 | c_realign_if_empty(oc); |
| 698 | |
| 699 | if (!co_data(oc)) { |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 700 | /* 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] | 701 | oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT); |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 702 | } |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 703 | |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 704 | /* if some data remain in the buffer, it's only because the |
| 705 | * system buffers are full, we will try next time. |
| 706 | */ |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 707 | } |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 708 | } |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 709 | } |
| 710 | |
Willy Tarreau | 25f1310 | 2015-09-24 11:32:22 +0200 | [diff] [blame] | 711 | /* This function is designed to be called from within the stream handler to |
| 712 | * update the channels' expiration timers and the stream interface's flags |
| 713 | * based on the channels' flags. It needs to be called only once after the |
| 714 | * channels' flags have settled down, and before they are cleared, though it |
| 715 | * doesn't harm to call it as often as desired (it just slightly hurts |
| 716 | * performance). It must not be called from outside of the stream handler, |
| 717 | * as what it does will be used to compute the stream task's expiration. |
| 718 | */ |
| 719 | void stream_int_update(struct stream_interface *si) |
| 720 | { |
| 721 | struct channel *ic = si_ic(si); |
| 722 | struct channel *oc = si_oc(si); |
| 723 | |
| 724 | if (!(ic->flags & CF_SHUTR)) { |
| 725 | /* Read not closed, update FD status and timeout for reads */ |
| 726 | if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) { |
| 727 | /* stop reading */ |
| 728 | if (!(si->flags & SI_FL_WAIT_ROOM)) { |
| 729 | if (!(ic->flags & CF_DONT_READ)) /* full */ |
| 730 | si->flags |= SI_FL_WAIT_ROOM; |
| 731 | ic->rex = TICK_ETERNITY; |
| 732 | } |
| 733 | } |
| 734 | else { |
| 735 | /* (re)start reading and update timeout. Note: we don't recompute the timeout |
| 736 | * everytime we get here, otherwise it would risk never to expire. We only |
| 737 | * update it if is was not yet set. The stream socket handler will already |
| 738 | * have updated it if there has been a completed I/O. |
| 739 | */ |
| 740 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 741 | if (!(ic->flags & (CF_READ_NOEXP|CF_DONT_READ)) && !tick_isset(ic->rex)) |
| 742 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
| 743 | } |
| 744 | } |
| 745 | |
| 746 | if (!(oc->flags & CF_SHUTW)) { |
| 747 | /* Write not closed, update FD status and timeout for writes */ |
| 748 | if (channel_is_empty(oc)) { |
| 749 | /* stop writing */ |
| 750 | if (!(si->flags & SI_FL_WAIT_DATA)) { |
| 751 | if ((oc->flags & CF_SHUTW_NOW) == 0) |
| 752 | si->flags |= SI_FL_WAIT_DATA; |
| 753 | oc->wex = TICK_ETERNITY; |
| 754 | } |
| 755 | } |
| 756 | else { |
| 757 | /* (re)start writing and update timeout. Note: we don't recompute the timeout |
| 758 | * everytime we get here, otherwise it would risk never to expire. We only |
| 759 | * update it if is was not yet set. The stream socket handler will already |
| 760 | * have updated it if there has been a completed I/O. |
| 761 | */ |
| 762 | si->flags &= ~SI_FL_WAIT_DATA; |
| 763 | if (!tick_isset(oc->wex)) { |
| 764 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
| 765 | if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
| 766 | /* Note: depending on the protocol, we don't know if we're waiting |
| 767 | * for incoming data or not. So in order to prevent the socket from |
| 768 | * expiring read timeouts during writes, we refresh the read timeout, |
| 769 | * except if it was already infinite or if we have explicitly setup |
| 770 | * independent streams. |
| 771 | */ |
| 772 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
| 773 | } |
| 774 | } |
| 775 | } |
| 776 | } |
| 777 | } |
| 778 | |
Willy Tarreau | 452c7d5 | 2015-09-25 10:39:16 +0200 | [diff] [blame] | 779 | /* Updates the polling status of a connection outside of the connection handler |
| 780 | * based on the channel's flags and the stream interface's flags. It needs to be |
| 781 | * called once after the channels' flags have settled down and the stream has |
| 782 | * been updated. It is not designed to be called from within the connection |
| 783 | * handler itself. |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 784 | */ |
| 785 | void stream_int_update_conn(struct stream_interface *si) |
| 786 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 787 | struct channel *ic = si_ic(si); |
| 788 | struct channel *oc = si_oc(si); |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 789 | struct conn_stream *cs = __objt_cs(si->end); |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 790 | |
Willy Tarreau | 2f4e702 | 2015-09-25 10:50:59 +0200 | [diff] [blame] | 791 | if (!(ic->flags & CF_SHUTR)) { |
| 792 | /* Read not closed */ |
| 793 | if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 794 | __cs_stop_recv(cs); |
Willy Tarreau | 2f4e702 | 2015-09-25 10:50:59 +0200 | [diff] [blame] | 795 | else |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 796 | __cs_want_recv(cs); |
Willy Tarreau | 2f4e702 | 2015-09-25 10:50:59 +0200 | [diff] [blame] | 797 | } |
| 798 | |
| 799 | if (!(oc->flags & CF_SHUTW)) { |
| 800 | /* Write not closed */ |
| 801 | if (channel_is_empty(oc)) |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 802 | __cs_stop_send(cs); |
Willy Tarreau | 2f4e702 | 2015-09-25 10:50:59 +0200 | [diff] [blame] | 803 | else |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 804 | __cs_want_send(cs); |
Willy Tarreau | 2f4e702 | 2015-09-25 10:50:59 +0200 | [diff] [blame] | 805 | } |
| 806 | |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 807 | cs_update_mux_polling(cs); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 808 | } |
| 809 | |
| 810 | /* |
| 811 | * This function performs a shutdown-read on a stream interface attached to |
| 812 | * a connection in a connected or init state (it does nothing for other |
| 813 | * states). It either shuts the read side or marks itself as closed. The buffer |
| 814 | * flags are updated to reflect the new state. If the stream interface has |
| 815 | * SI_FL_NOHALF, we also forward the close to the write side. If a control |
| 816 | * 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] | 817 | * descriptors are then shutdown or closed accordingly. The function |
| 818 | * automatically disables polling if needed. |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 819 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 820 | static void stream_int_shutr_conn(struct stream_interface *si) |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 821 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 822 | struct conn_stream *cs = __objt_cs(si->end); |
| 823 | struct connection *conn = cs->conn; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 824 | struct channel *ic = si_ic(si); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 825 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 826 | ic->flags &= ~CF_SHUTR_NOW; |
| 827 | if (ic->flags & CF_SHUTR) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 828 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 829 | ic->flags |= CF_SHUTR; |
| 830 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 831 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 832 | |
| 833 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 834 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 835 | |
Willy Tarreau | 2bb4a96 | 2014-11-28 11:11:05 +0100 | [diff] [blame] | 836 | if (si_oc(si)->flags & CF_SHUTW) { |
Willy Tarreau | a553ae9 | 2017-10-05 18:52:17 +0200 | [diff] [blame] | 837 | cs_close(cs); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 838 | si->state = SI_ST_DIS; |
| 839 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 840 | } |
| 841 | else if (si->flags & SI_FL_NOHALF) { |
| 842 | /* we want to immediately forward this close to the write side */ |
| 843 | return stream_int_shutw_conn(si); |
| 844 | } |
| 845 | else if (conn->ctrl) { |
| 846 | /* we want the caller to disable polling on this FD */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 847 | cs_stop_recv(cs); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 848 | } |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 849 | } |
| 850 | |
| 851 | /* |
| 852 | * This function performs a shutdown-write on a stream interface attached to |
| 853 | * a connection in a connected or init state (it does nothing for other |
| 854 | * states). It either shuts the write side or marks itself as closed. The |
| 855 | * buffer flags are updated to reflect the new state. It does also close |
| 856 | * 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] | 857 | * data-layer shutdown, it is called. |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 858 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 859 | static void stream_int_shutw_conn(struct stream_interface *si) |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 860 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 861 | struct conn_stream *cs = __objt_cs(si->end); |
| 862 | struct connection *conn = cs->conn; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 863 | struct channel *ic = si_ic(si); |
| 864 | struct channel *oc = si_oc(si); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 865 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 866 | oc->flags &= ~CF_SHUTW_NOW; |
| 867 | if (oc->flags & CF_SHUTW) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 868 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 869 | oc->flags |= CF_SHUTW; |
| 870 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 871 | si->flags &= ~SI_FL_WAIT_DATA; |
| 872 | |
Hongbo Long | e39683c | 2017-03-10 18:41:51 +0100 | [diff] [blame] | 873 | if (tick_isset(si->hcto)) { |
| 874 | ic->rto = si->hcto; |
| 875 | ic->rex = tick_add(now_ms, ic->rto); |
| 876 | } |
| 877 | |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 878 | switch (si->state) { |
| 879 | case SI_ST_EST: |
| 880 | /* we have to shut before closing, otherwise some short messages |
| 881 | * may never leave the system, especially when there are remaining |
| 882 | * unread data in the socket input buffer, or when nolinger is set. |
| 883 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 884 | * no risk so we close both sides immediately. |
| 885 | */ |
| 886 | if (si->flags & SI_FL_ERR) { |
| 887 | /* quick close, the socket is alredy shut anyway */ |
| 888 | } |
| 889 | else if (si->flags & SI_FL_NOLINGER) { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 890 | /* unclean data-layer shutdown, typically an aborted request |
| 891 | * or a forwarded shutdown from a client to a server due to |
| 892 | * option abortonclose. No need for the TLS layer to try to |
| 893 | * emit a shutdown message. |
| 894 | */ |
Willy Tarreau | ecdb3fe | 2017-10-05 15:25:48 +0200 | [diff] [blame] | 895 | cs_shutw(cs, CS_SHW_SILENT); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 896 | } |
| 897 | else { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 898 | /* clean data-layer shutdown. This only happens on the |
| 899 | * frontend side, or on the backend side when forwarding |
| 900 | * a client close in TCP mode or in HTTP TUNNEL mode |
| 901 | * while option abortonclose is set. We want the TLS |
| 902 | * layer to try to signal it to the peer before we close. |
| 903 | */ |
Willy Tarreau | ecdb3fe | 2017-10-05 15:25:48 +0200 | [diff] [blame] | 904 | cs_shutw(cs, CS_SHW_NORMAL); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 905 | |
Willy Tarreau | a553ae9 | 2017-10-05 18:52:17 +0200 | [diff] [blame] | 906 | if (!(ic->flags & (CF_SHUTR|CF_DONT_READ))) { |
| 907 | /* OK just a shutw, but we want the caller |
| 908 | * to disable polling on this FD if exists. |
| 909 | */ |
| 910 | conn_cond_update_polling(conn); |
| 911 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 912 | } |
| 913 | } |
| 914 | |
| 915 | /* fall through */ |
| 916 | case SI_ST_CON: |
| 917 | /* we may have to close a pending connection, and mark the |
| 918 | * response buffer as shutr |
| 919 | */ |
Willy Tarreau | a553ae9 | 2017-10-05 18:52:17 +0200 | [diff] [blame] | 920 | cs_close(cs); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 921 | /* fall through */ |
| 922 | case SI_ST_CER: |
| 923 | case SI_ST_QUE: |
| 924 | case SI_ST_TAR: |
| 925 | si->state = SI_ST_DIS; |
Willy Tarreau | 4a59f2f | 2013-10-24 20:10:45 +0200 | [diff] [blame] | 926 | /* fall through */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 927 | default: |
| 928 | si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 929 | ic->flags &= ~CF_SHUTR_NOW; |
| 930 | ic->flags |= CF_SHUTR; |
| 931 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 932 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 933 | } |
| 934 | } |
| 935 | |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 936 | /* This function is used for inter-stream-interface calls. It is called by the |
| 937 | * consumer to inform the producer side that it may be interested in checking |
| 938 | * for free space in the buffer. Note that it intentionally does not update |
| 939 | * timeouts, so that we can still check them later at wake-up. This function is |
| 940 | * dedicated to connection-based stream interfaces. |
| 941 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 942 | static void stream_int_chk_rcv_conn(struct stream_interface *si) |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 943 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 944 | struct channel *ic = si_ic(si); |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 945 | struct conn_stream *cs = __objt_cs(si->end); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 946 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 947 | if (unlikely(si->state > SI_ST_EST || (ic->flags & CF_SHUTR))) |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 948 | return; |
| 949 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 950 | if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) { |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 951 | /* stop reading */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 952 | if (!(ic->flags & CF_DONT_READ)) /* full */ |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 953 | si->flags |= SI_FL_WAIT_ROOM; |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 954 | __cs_stop_recv(cs); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 955 | } |
| 956 | else { |
| 957 | /* (re)start reading */ |
| 958 | si->flags &= ~SI_FL_WAIT_ROOM; |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 959 | __cs_want_recv(cs); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 960 | } |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 961 | cs_update_mux_polling(cs); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 962 | } |
| 963 | |
| 964 | |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 965 | /* This function is used for inter-stream-interface calls. It is called by the |
| 966 | * producer to inform the consumer side that it may be interested in checking |
| 967 | * for data in the buffer. Note that it intentionally does not update timeouts, |
| 968 | * so that we can still check them later at wake-up. |
| 969 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 970 | static void stream_int_chk_snd_conn(struct stream_interface *si) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 971 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 972 | struct channel *oc = si_oc(si); |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 973 | struct conn_stream *cs = __objt_cs(si->end); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 974 | |
Bin Wang | 95fad5b | 2017-09-15 14:56:40 +0800 | [diff] [blame] | 975 | /* ensure it's only set if a write attempt has succeeded */ |
| 976 | oc->flags &= ~CF_WRITE_PARTIAL; |
| 977 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 978 | if (unlikely(si->state > SI_ST_EST || (oc->flags & CF_SHUTW))) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 979 | return; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 980 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 981 | if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 982 | return; |
| 983 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 984 | if (!oc->pipe && /* spliced data wants to be forwarded ASAP */ |
Willy Tarreau | b016587 | 2012-12-15 10:12:39 +0100 | [diff] [blame] | 985 | !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 986 | return; |
| 987 | |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 988 | if (cs->flags & CS_FL_DATA_WR_ENA) { |
Willy Tarreau | 5007d2a | 2013-07-18 22:09:48 +0200 | [diff] [blame] | 989 | /* already subscribed to write notifications, will be called |
| 990 | * anyway, so let's avoid calling it especially if the reader |
| 991 | * is not ready. |
| 992 | */ |
| 993 | return; |
| 994 | } |
| 995 | |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 996 | __cs_want_send(cs); |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 997 | |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 998 | si_cs_send(cs); |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 999 | if (cs->flags & CS_FL_ERROR || cs->conn->flags & CO_FL_ERROR) { |
Willy Tarreau | 3b9c850 | 2017-10-25 14:22:28 +0200 | [diff] [blame] | 1000 | /* Write error on the file descriptor */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1001 | __cs_stop_both(cs); |
Willy Tarreau | 3b9c850 | 2017-10-25 14:22:28 +0200 | [diff] [blame] | 1002 | si->flags |= SI_FL_ERR; |
| 1003 | goto out_wakeup; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1004 | } |
| 1005 | |
| 1006 | /* OK, so now we know that some data might have been sent, and that we may |
| 1007 | * have to poll first. We have to do that too if the buffer is not empty. |
| 1008 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1009 | if (channel_is_empty(oc)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1010 | /* the connection is established but we can't write. Either the |
| 1011 | * buffer is empty, or we just refrain from sending because the |
| 1012 | * ->o limit was reached. Maybe we just wrote the last |
| 1013 | * chunk and need to close. |
| 1014 | */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1015 | __cs_stop_send(cs); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1016 | if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) == |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1017 | (CF_AUTO_CLOSE|CF_SHUTW_NOW)) && |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1018 | (si->state == SI_ST_EST)) { |
| 1019 | si_shutw(si); |
| 1020 | goto out_wakeup; |
| 1021 | } |
| 1022 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1023 | if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1024 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1025 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1026 | } |
| 1027 | else { |
| 1028 | /* Otherwise there are remaining data to be sent in the buffer, |
| 1029 | * which means we have to poll before doing so. |
| 1030 | */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1031 | __cs_want_send(cs); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1032 | si->flags &= ~SI_FL_WAIT_DATA; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1033 | if (!tick_isset(oc->wex)) |
| 1034 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1035 | } |
| 1036 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1037 | if (likely(oc->flags & CF_WRITE_ACTIVITY)) { |
| 1038 | struct channel *ic = si_ic(si); |
| 1039 | |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1040 | /* update timeout if we have written something */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1041 | if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
| 1042 | !channel_is_empty(oc)) |
| 1043 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1044 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1045 | if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1046 | /* Note: to prevent the client from expiring read timeouts |
| 1047 | * during writes, we refresh it. We only do this if the |
| 1048 | * interface is not configured for "independent streams", |
| 1049 | * because for some applications it's better not to do this, |
| 1050 | * for instance when continuously exchanging small amounts |
| 1051 | * of data which can full the socket buffers long before a |
| 1052 | * write timeout is detected. |
| 1053 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1054 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1055 | } |
| 1056 | } |
| 1057 | |
| 1058 | /* in case of special condition (error, shutdown, end of write...), we |
| 1059 | * have to notify the task. |
| 1060 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1061 | if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) || |
| 1062 | ((oc->flags & CF_WAKE_WRITE) && |
| 1063 | ((channel_is_empty(oc) && !oc->to_forward) || |
Willy Tarreau | e6300be | 2014-01-25 02:33:21 +0100 | [diff] [blame] | 1064 | si->state != SI_ST_EST)))) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1065 | out_wakeup: |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 1066 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 1067 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1068 | } |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 1069 | |
| 1070 | /* commit possible polling changes */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1071 | cs_update_mux_polling(cs); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1072 | } |
| 1073 | |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1074 | /* |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1075 | * 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] | 1076 | * 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] | 1077 | * rcv_buf function. |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1078 | */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1079 | static void si_cs_recv_cb(struct conn_stream *cs) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1080 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1081 | struct connection *conn = cs->conn; |
| 1082 | struct stream_interface *si = cs->data; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1083 | struct channel *ic = si_ic(si); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1084 | int ret, max, cur_read; |
| 1085 | int read_poll = MAX_READ_POLL_LOOPS; |
| 1086 | |
| 1087 | /* stop immediately on errors. Note that we DON'T want to stop on |
| 1088 | * POLL_ERR, as the poller might report a write error while there |
| 1089 | * are still data available in the recv buffer. This typically |
| 1090 | * happens when we send too large a request to a backend server |
| 1091 | * which rejects it before reading it all. |
| 1092 | */ |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 1093 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1094 | return; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1095 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1096 | /* maybe we were called immediately after an asynchronous shutr */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1097 | if (ic->flags & CF_SHUTR) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1098 | return; |
| 1099 | |
Willy Tarreau | 54e917c | 2017-08-30 07:35:35 +0200 | [diff] [blame] | 1100 | /* stop here if we reached the end of data */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1101 | if (cs->flags & CS_FL_EOS) |
Willy Tarreau | 54e917c | 2017-08-30 07:35:35 +0200 | [diff] [blame] | 1102 | goto out_shutdown_r; |
| 1103 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1104 | cur_read = 0; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1105 | |
Willy Tarreau | 77e478c | 2018-06-19 07:03:14 +0200 | [diff] [blame] | 1106 | if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !co_data(ic) && |
Willy Tarreau | 7e31273 | 2014-02-12 16:35:14 +0100 | [diff] [blame] | 1107 | global.tune.idle_timer && |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1108 | (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1109 | /* The buffer was empty and nothing was transferred for more |
| 1110 | * than one second. This was caused by a pause and not by |
| 1111 | * congestion. Reset any streaming mode to reduce latency. |
| 1112 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1113 | ic->xfer_small = 0; |
| 1114 | ic->xfer_large = 0; |
| 1115 | ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1116 | } |
| 1117 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1118 | /* First, let's see if we may splice data across the channel without |
| 1119 | * using a buffer. |
| 1120 | */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1121 | if (conn->xprt->rcv_pipe && conn->mux->rcv_pipe && |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1122 | (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) && |
| 1123 | ic->flags & CF_KERN_SPLICING) { |
Willy Tarreau | d760eec | 2018-07-10 09:50:25 +0200 | [diff] [blame] | 1124 | if (c_data(ic)) { |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1125 | /* We're embarrassed, there are already data pending in |
| 1126 | * the buffer and we don't want to have them at two |
| 1127 | * locations at a time. Let's indicate we need some |
| 1128 | * place and ask the consumer to hurry. |
| 1129 | */ |
| 1130 | goto abort_splice; |
| 1131 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1132 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1133 | if (unlikely(ic->pipe == NULL)) { |
| 1134 | if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) { |
| 1135 | ic->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1136 | goto abort_splice; |
| 1137 | } |
| 1138 | } |
| 1139 | |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1140 | ret = conn->mux->rcv_pipe(cs, ic->pipe, ic->to_forward); |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1141 | if (ret < 0) { |
| 1142 | /* splice not supported on this end, let's disable it */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1143 | ic->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1144 | goto abort_splice; |
| 1145 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1146 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1147 | if (ret > 0) { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1148 | if (ic->to_forward != CHN_INFINITE_FORWARD) |
| 1149 | ic->to_forward -= ret; |
| 1150 | ic->total += ret; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1151 | cur_read += ret; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1152 | ic->flags |= CF_READ_PARTIAL; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1153 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1154 | |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1155 | if (cs->flags & CS_FL_EOS) |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1156 | goto out_shutdown_r; |
| 1157 | |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 1158 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1159 | return; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1160 | |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1161 | if (conn->flags & CO_FL_WAIT_ROOM) { |
| 1162 | /* the pipe is full or we have read enough data that it |
| 1163 | * could soon be full. Let's stop before needing to poll. |
| 1164 | */ |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1165 | si->flags |= SI_FL_WAIT_ROOM; |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1166 | __cs_stop_recv(cs); |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1167 | } |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1168 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1169 | /* splice not possible (anymore), let's go on on standard copy */ |
| 1170 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1171 | |
| 1172 | abort_splice: |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1173 | if (ic->pipe && unlikely(!ic->pipe->data)) { |
| 1174 | put_pipe(ic->pipe); |
| 1175 | ic->pipe = NULL; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1176 | } |
| 1177 | |
Christopher Faulet | a73e59b | 2016-12-09 17:30:18 +0100 | [diff] [blame] | 1178 | /* now we'll need a input buffer for the stream */ |
| 1179 | if (!channel_alloc_buffer(ic, &(si_strm(si)->buffer_wait))) { |
Willy Tarreau | 10fc09e | 2014-11-25 19:46:36 +0100 | [diff] [blame] | 1180 | si->flags |= SI_FL_WAIT_ROOM; |
| 1181 | goto end_recv; |
| 1182 | } |
| 1183 | |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1184 | /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling |
| 1185 | * was enabled, which implies that the recv buffer was not full. So we have a guarantee |
| 1186 | * that if such an event is not handled above in splice, it will be handled here by |
| 1187 | * recv(). |
| 1188 | */ |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 1189 | while (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_WAIT_ROOM | CO_FL_HANDSHAKE)) && |
Willy Tarreau | b78b80e | 2017-12-12 09:58:40 +0100 | [diff] [blame] | 1190 | !(cs->flags & (CS_FL_ERROR|CS_FL_EOS)) && !(ic->flags & CF_SHUTR)) { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1191 | max = channel_recv_max(ic); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1192 | |
| 1193 | if (!max) { |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1194 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1195 | break; |
| 1196 | } |
| 1197 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1198 | ret = conn->mux->rcv_buf(cs, &ic->buf, max, co_data(ic) ? CO_RFL_BUF_WET : 0); |
Willy Tarreau | 6577b48 | 2017-12-10 21:19:33 +0100 | [diff] [blame] | 1199 | if (cs->flags & CS_FL_RCV_MORE) |
| 1200 | si->flags |= SI_FL_WAIT_ROOM; |
| 1201 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1202 | if (ret <= 0) |
| 1203 | break; |
| 1204 | |
| 1205 | cur_read += ret; |
| 1206 | |
| 1207 | /* if we're allowed to directly forward data, we must update ->o */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1208 | if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1209 | unsigned long fwd = ret; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1210 | if (ic->to_forward != CHN_INFINITE_FORWARD) { |
| 1211 | if (fwd > ic->to_forward) |
| 1212 | fwd = ic->to_forward; |
| 1213 | ic->to_forward -= fwd; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1214 | } |
Willy Tarreau | bcbd393 | 2018-06-06 07:13:22 +0200 | [diff] [blame] | 1215 | c_adv(ic, fwd); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1216 | } |
| 1217 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1218 | ic->flags |= CF_READ_PARTIAL; |
| 1219 | ic->total += ret; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1220 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1221 | if (!channel_may_recv(ic)) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1222 | si->flags |= SI_FL_WAIT_ROOM; |
| 1223 | break; |
| 1224 | } |
| 1225 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1226 | if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0) { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1227 | /* |
| 1228 | * This used to be __conn_xprt_done_recv() |
| 1229 | * This was changed to accomodate with the mux code, |
| 1230 | * but we may have lost a worthwhile optimization. |
| 1231 | */ |
| 1232 | __cs_stop_recv(cs); |
Willy Tarreau | 62dd698 | 2017-11-18 11:26:20 +0100 | [diff] [blame] | 1233 | si->flags |= SI_FL_WAIT_ROOM; |
| 1234 | break; |
Willy Tarreau | 5fddab0 | 2012-11-09 18:27:26 +0100 | [diff] [blame] | 1235 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1236 | |
| 1237 | /* if too many bytes were missing from last read, it means that |
| 1238 | * it's pointless trying to read again because the system does |
| 1239 | * not have them in buffers. |
| 1240 | */ |
| 1241 | if (ret < max) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1242 | /* if a streamer has read few data, it may be because we |
| 1243 | * have exhausted system buffers. It's not worth trying |
| 1244 | * again. |
| 1245 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1246 | if (ic->flags & CF_STREAMER) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1247 | break; |
| 1248 | |
| 1249 | /* if we read a large block smaller than what we requested, |
| 1250 | * it's almost certain we'll never get anything more. |
| 1251 | */ |
| 1252 | if (ret >= global.tune.recv_enough) |
| 1253 | break; |
| 1254 | } |
| 1255 | } /* while !flags */ |
| 1256 | |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1257 | if (cur_read) { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1258 | if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1259 | (cur_read <= ic->buf.size / 2)) { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1260 | ic->xfer_large = 0; |
| 1261 | ic->xfer_small++; |
| 1262 | if (ic->xfer_small >= 3) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1263 | /* we have read less than half of the buffer in |
| 1264 | * one pass, and this happened at least 3 times. |
| 1265 | * This is definitely not a streamer. |
| 1266 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1267 | ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1268 | } |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1269 | else if (ic->xfer_small >= 2) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1270 | /* if the buffer has been at least half full twice, |
| 1271 | * we receive faster than we send, so at least it |
| 1272 | * is not a "fast streamer". |
| 1273 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1274 | ic->flags &= ~CF_STREAMER_FAST; |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1275 | } |
| 1276 | } |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1277 | else if (!(ic->flags & CF_STREAMER_FAST) && |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1278 | (cur_read >= ic->buf.size - global.tune.maxrewrite)) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1279 | /* we read a full buffer at once */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1280 | ic->xfer_small = 0; |
| 1281 | ic->xfer_large++; |
| 1282 | if (ic->xfer_large >= 3) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1283 | /* we call this buffer a fast streamer if it manages |
| 1284 | * to be filled in one call 3 consecutive times. |
| 1285 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1286 | ic->flags |= (CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1287 | } |
| 1288 | } |
| 1289 | else { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1290 | ic->xfer_small = 0; |
| 1291 | ic->xfer_large = 0; |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1292 | } |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1293 | ic->last_read = now_ms; |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1294 | } |
| 1295 | |
Willy Tarreau | 10fc09e | 2014-11-25 19:46:36 +0100 | [diff] [blame] | 1296 | end_recv: |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 1297 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) |
Willy Tarreau | 10fc09e | 2014-11-25 19:46:36 +0100 | [diff] [blame] | 1298 | return; |
| 1299 | |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1300 | if (cs->flags & CS_FL_EOS) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1301 | /* connection closed */ |
| 1302 | goto out_shutdown_r; |
| 1303 | |
| 1304 | return; |
| 1305 | |
| 1306 | out_shutdown_r: |
| 1307 | /* we received a shutdown */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1308 | ic->flags |= CF_READ_NULL; |
| 1309 | if (ic->flags & CF_AUTO_CLOSE) |
| 1310 | channel_shutw_now(ic); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1311 | stream_sock_read0(si); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1312 | return; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1313 | } |
| 1314 | |
| 1315 | /* |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1316 | * This is the callback which is called by the connection layer to send data |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 1317 | * from the buffer to the connection. It iterates over the transport layer's |
| 1318 | * snd_buf function. |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1319 | */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1320 | static void si_cs_send_cb(struct conn_stream *cs) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1321 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1322 | struct connection *conn = cs->conn; |
| 1323 | struct stream_interface *si = cs->data; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1324 | |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 1325 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1326 | return; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1327 | |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1328 | if (conn->flags & CO_FL_HANDSHAKE) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1329 | /* a handshake was requested */ |
| 1330 | return; |
| 1331 | |
| 1332 | /* we might have been called just after an asynchronous shutw */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1333 | if (si_oc(si)->flags & CF_SHUTW) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1334 | return; |
| 1335 | |
| 1336 | /* OK there are data waiting to be sent */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1337 | si_cs_send(cs); |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1338 | |
| 1339 | /* OK all done */ |
| 1340 | return; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1341 | } |
| 1342 | |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1343 | /* |
| 1344 | * This function propagates a null read received on a socket-based connection. |
| 1345 | * 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] | 1346 | * the close is also forwarded to the write side as an abort. |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1347 | */ |
| 1348 | void stream_sock_read0(struct stream_interface *si) |
| 1349 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1350 | struct conn_stream *cs = __objt_cs(si->end); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1351 | struct channel *ic = si_ic(si); |
| 1352 | struct channel *oc = si_oc(si); |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1353 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1354 | ic->flags &= ~CF_SHUTR_NOW; |
| 1355 | if (ic->flags & CF_SHUTR) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1356 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1357 | ic->flags |= CF_SHUTR; |
| 1358 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1359 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 1360 | |
| 1361 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
| 1362 | return; |
| 1363 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1364 | if (oc->flags & CF_SHUTW) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1365 | goto do_close; |
| 1366 | |
| 1367 | if (si->flags & SI_FL_NOHALF) { |
| 1368 | /* we want to immediately forward this close to the write side */ |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 1369 | /* force flag on ssl to keep stream in cache */ |
Willy Tarreau | ecdb3fe | 2017-10-05 15:25:48 +0200 | [diff] [blame] | 1370 | cs_shutw(cs, CS_SHW_SILENT); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1371 | goto do_close; |
| 1372 | } |
| 1373 | |
| 1374 | /* otherwise that's just a normal read shutdown */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1375 | __cs_stop_recv(cs); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1376 | return; |
| 1377 | |
| 1378 | do_close: |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1379 | /* 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] | 1380 | cs_close(cs); |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1381 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1382 | oc->flags &= ~CF_SHUTW_NOW; |
| 1383 | oc->flags |= CF_SHUTW; |
| 1384 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1385 | |
| 1386 | si->flags &= ~(SI_FL_WAIT_DATA | SI_FL_WAIT_ROOM); |
| 1387 | |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1388 | si->state = SI_ST_DIS; |
| 1389 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1390 | return; |
| 1391 | } |
| 1392 | |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 1393 | /* Callback to be used by applet handlers upon completion. It updates the stream |
| 1394 | * (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] | 1395 | * 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] | 1396 | * states. |
| 1397 | */ |
Willy Tarreau | aa977ba | 2015-09-25 11:45:06 +0200 | [diff] [blame] | 1398 | void si_applet_wake_cb(struct stream_interface *si) |
Willy Tarreau | e5f8649 | 2015-04-19 15:16:35 +0200 | [diff] [blame] | 1399 | { |
Willy Tarreau | eca572f | 2015-09-25 19:11:55 +0200 | [diff] [blame] | 1400 | struct channel *ic = si_ic(si); |
| 1401 | |
| 1402 | /* If the applet wants to write and the channel is closed, it's a |
| 1403 | * broken pipe and it must be reported. |
| 1404 | */ |
| 1405 | if ((si->flags & SI_FL_WANT_PUT) && (ic->flags & CF_SHUTR)) |
| 1406 | si->flags |= SI_FL_ERR; |
| 1407 | |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 1408 | /* update the stream-int, channels, and possibly wake the stream up */ |
| 1409 | stream_int_notify(si); |
Willy Tarreau | e5f8649 | 2015-04-19 15:16:35 +0200 | [diff] [blame] | 1410 | |
Emeric Brun | 2802b07 | 2017-06-30 14:11:56 +0200 | [diff] [blame] | 1411 | /* stream_int_notify may pass throught checksnd and released some |
| 1412 | * WAIT_ROOM flags. The process_stream will consider those flags |
| 1413 | * to wakeup the appctx but in the case the task is not in runqueue |
| 1414 | * we may have to wakeup the appctx immediately. |
| 1415 | */ |
| 1416 | if (!task_in_rq(si_task(si))) |
| 1417 | stream_int_update_applet(si); |
| 1418 | } |
Willy Tarreau | 452c7d5 | 2015-09-25 10:39:16 +0200 | [diff] [blame] | 1419 | |
| 1420 | /* Updates the activity status of an applet outside of the applet handler based |
| 1421 | * on the channel's flags and the stream interface's flags. It needs to be |
| 1422 | * called once after the channels' flags have settled down and the stream has |
| 1423 | * been updated. It is not designed to be called from within the applet handler |
| 1424 | * itself. |
Willy Tarreau | 563cc37 | 2015-04-19 18:13:56 +0200 | [diff] [blame] | 1425 | */ |
| 1426 | void stream_int_update_applet(struct stream_interface *si) |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1427 | { |
Willy Tarreau | fe12793 | 2015-04-21 19:23:39 +0200 | [diff] [blame] | 1428 | if (((si->flags & (SI_FL_WANT_PUT|SI_FL_WAIT_ROOM)) == SI_FL_WANT_PUT) || |
| 1429 | ((si->flags & (SI_FL_WANT_GET|SI_FL_WAIT_DATA)) == SI_FL_WANT_GET)) |
Willy Tarreau | 563cc37 | 2015-04-19 18:13:56 +0200 | [diff] [blame] | 1430 | appctx_wakeup(si_appctx(si)); |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1431 | } |
| 1432 | |
| 1433 | /* |
| 1434 | * This function performs a shutdown-read on a stream interface attached to an |
| 1435 | * applet in a connected or init state (it does nothing for other states). It |
| 1436 | * either shuts the read side or marks itself as closed. The buffer flags are |
| 1437 | * updated to reflect the new state. If the stream interface has SI_FL_NOHALF, |
| 1438 | * we also forward the close to the write side. The owner task is woken up if |
| 1439 | * it exists. |
| 1440 | */ |
| 1441 | static void stream_int_shutr_applet(struct stream_interface *si) |
| 1442 | { |
| 1443 | struct channel *ic = si_ic(si); |
| 1444 | |
| 1445 | ic->flags &= ~CF_SHUTR_NOW; |
| 1446 | if (ic->flags & CF_SHUTR) |
| 1447 | return; |
| 1448 | ic->flags |= CF_SHUTR; |
| 1449 | ic->rex = TICK_ETERNITY; |
| 1450 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 1451 | |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1452 | /* Note: on shutr, we don't call the applet */ |
| 1453 | |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1454 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
| 1455 | return; |
| 1456 | |
| 1457 | if (si_oc(si)->flags & CF_SHUTW) { |
Willy Tarreau | 958f074 | 2015-09-25 20:24:26 +0200 | [diff] [blame] | 1458 | si_applet_release(si); |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1459 | si->state = SI_ST_DIS; |
| 1460 | si->exp = TICK_ETERNITY; |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1461 | } |
| 1462 | else if (si->flags & SI_FL_NOHALF) { |
| 1463 | /* we want to immediately forward this close to the write side */ |
| 1464 | return stream_int_shutw_applet(si); |
| 1465 | } |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1466 | } |
| 1467 | |
| 1468 | /* |
| 1469 | * This function performs a shutdown-write on a stream interface attached to an |
| 1470 | * applet in a connected or init state (it does nothing for other states). It |
| 1471 | * either shuts the write side or marks itself as closed. The buffer flags are |
| 1472 | * updated to reflect the new state. It does also close everything if the SI |
| 1473 | * was marked as being in error state. The owner task is woken up if it exists. |
| 1474 | */ |
| 1475 | static void stream_int_shutw_applet(struct stream_interface *si) |
| 1476 | { |
| 1477 | struct channel *ic = si_ic(si); |
| 1478 | struct channel *oc = si_oc(si); |
| 1479 | |
| 1480 | oc->flags &= ~CF_SHUTW_NOW; |
| 1481 | if (oc->flags & CF_SHUTW) |
| 1482 | return; |
| 1483 | oc->flags |= CF_SHUTW; |
| 1484 | oc->wex = TICK_ETERNITY; |
| 1485 | si->flags &= ~SI_FL_WAIT_DATA; |
| 1486 | |
Hongbo Long | e39683c | 2017-03-10 18:41:51 +0100 | [diff] [blame] | 1487 | if (tick_isset(si->hcto)) { |
| 1488 | ic->rto = si->hcto; |
| 1489 | ic->rex = tick_add(now_ms, ic->rto); |
| 1490 | } |
| 1491 | |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1492 | /* on shutw we always wake the applet up */ |
| 1493 | appctx_wakeup(si_appctx(si)); |
| 1494 | |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1495 | switch (si->state) { |
| 1496 | case SI_ST_EST: |
| 1497 | /* we have to shut before closing, otherwise some short messages |
| 1498 | * may never leave the system, especially when there are remaining |
| 1499 | * unread data in the socket input buffer, or when nolinger is set. |
| 1500 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 1501 | * no risk so we close both sides immediately. |
| 1502 | */ |
| 1503 | if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) && |
| 1504 | !(ic->flags & (CF_SHUTR|CF_DONT_READ))) |
| 1505 | return; |
| 1506 | |
| 1507 | /* fall through */ |
| 1508 | case SI_ST_CON: |
| 1509 | case SI_ST_CER: |
| 1510 | case SI_ST_QUE: |
| 1511 | case SI_ST_TAR: |
| 1512 | /* Note that none of these states may happen with applets */ |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1513 | si_applet_release(si); |
Willy Tarreau | 958f074 | 2015-09-25 20:24:26 +0200 | [diff] [blame] | 1514 | si->state = SI_ST_DIS; |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1515 | default: |
| 1516 | si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER); |
| 1517 | ic->flags &= ~CF_SHUTR_NOW; |
| 1518 | ic->flags |= CF_SHUTR; |
| 1519 | ic->rex = TICK_ETERNITY; |
| 1520 | si->exp = TICK_ETERNITY; |
| 1521 | } |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1522 | } |
| 1523 | |
| 1524 | /* chk_rcv function for applets */ |
| 1525 | static void stream_int_chk_rcv_applet(struct stream_interface *si) |
| 1526 | { |
| 1527 | struct channel *ic = si_ic(si); |
| 1528 | |
| 1529 | DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n", |
| 1530 | __FUNCTION__, |
| 1531 | si, si->state, ic->flags, si_oc(si)->flags); |
| 1532 | |
| 1533 | if (unlikely(si->state != SI_ST_EST || (ic->flags & (CF_SHUTR|CF_DONT_READ)))) |
| 1534 | return; |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1535 | /* here we only wake the applet up if it was waiting for some room */ |
| 1536 | if (!(si->flags & SI_FL_WAIT_ROOM)) |
| 1537 | return; |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1538 | |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1539 | if (channel_may_recv(ic) && !ic->pipe) { |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1540 | /* (re)start reading */ |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1541 | appctx_wakeup(si_appctx(si)); |
Thierry FOURNIER | 5bc2cbf | 2015-09-04 18:40:36 +0200 | [diff] [blame] | 1542 | } |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1543 | } |
| 1544 | |
| 1545 | /* chk_snd function for applets */ |
| 1546 | static void stream_int_chk_snd_applet(struct stream_interface *si) |
| 1547 | { |
| 1548 | struct channel *oc = si_oc(si); |
| 1549 | |
| 1550 | DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n", |
| 1551 | __FUNCTION__, |
| 1552 | si, si->state, si_ic(si)->flags, oc->flags); |
| 1553 | |
| 1554 | if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW))) |
| 1555 | return; |
| 1556 | |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1557 | /* we only wake the applet up if it was waiting for some data */ |
| 1558 | |
| 1559 | if (!(si->flags & SI_FL_WAIT_DATA)) |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1560 | return; |
| 1561 | |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1562 | if (!tick_isset(oc->wex)) |
| 1563 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
| 1564 | |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1565 | if (!channel_is_empty(oc)) { |
| 1566 | /* (re)start sending */ |
| 1567 | appctx_wakeup(si_appctx(si)); |
| 1568 | } |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1569 | } |
| 1570 | |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 1571 | /* |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 1572 | * Local variables: |
| 1573 | * c-indent-level: 8 |
| 1574 | * c-basic-offset: 8 |
| 1575 | * End: |
| 1576 | */ |