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 | a254a37 | 2019-04-05 15:30:12 +0200 | [diff] [blame] | 33 | #include <proto/http_htx.h> |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 34 | #include <proto/mux_pt.h> |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 35 | #include <proto/pipe.h> |
Olivier Houchard | a254a37 | 2019-04-05 15:30:12 +0200 | [diff] [blame] | 36 | #include <proto/proxy.h> |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 37 | #include <proto/stream.h> |
Willy Tarreau | 269358d | 2009-09-20 20:14:49 +0200 | [diff] [blame] | 38 | #include <proto/stream_interface.h> |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 39 | #include <proto/task.h> |
| 40 | |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 41 | #include <types/pipe.h> |
| 42 | |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 43 | /* functions used by default on a detached stream-interface */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 44 | static void stream_int_shutr(struct stream_interface *si); |
| 45 | static void stream_int_shutw(struct stream_interface *si); |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 46 | static void stream_int_chk_rcv(struct stream_interface *si); |
| 47 | static void stream_int_chk_snd(struct stream_interface *si); |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 48 | |
| 49 | /* functions used on a conn_stream-based stream-interface */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 50 | static void stream_int_shutr_conn(struct stream_interface *si); |
| 51 | static void stream_int_shutw_conn(struct stream_interface *si); |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 52 | static void stream_int_chk_rcv_conn(struct stream_interface *si); |
| 53 | static void stream_int_chk_snd_conn(struct stream_interface *si); |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 54 | |
| 55 | /* functions used on an applet-based stream-interface */ |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 56 | static void stream_int_shutr_applet(struct stream_interface *si); |
| 57 | static void stream_int_shutw_applet(struct stream_interface *si); |
| 58 | static void stream_int_chk_rcv_applet(struct stream_interface *si); |
| 59 | static void stream_int_chk_snd_applet(struct stream_interface *si); |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 60 | |
| 61 | /* last read notification */ |
| 62 | static void stream_int_read0(struct stream_interface *si); |
| 63 | |
| 64 | /* post-IO notification callback */ |
| 65 | static void stream_int_notify(struct stream_interface *si); |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 66 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 67 | /* stream-interface operations for embedded tasks */ |
| 68 | struct si_ops si_embedded_ops = { |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 69 | .chk_rcv = stream_int_chk_rcv, |
| 70 | .chk_snd = stream_int_chk_snd, |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 71 | .shutr = stream_int_shutr, |
| 72 | .shutw = stream_int_shutw, |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 73 | }; |
| 74 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 75 | /* stream-interface operations for connections */ |
| 76 | struct si_ops si_conn_ops = { |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 77 | .chk_rcv = stream_int_chk_rcv_conn, |
| 78 | .chk_snd = stream_int_chk_snd_conn, |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 79 | .shutr = stream_int_shutr_conn, |
| 80 | .shutw = stream_int_shutw_conn, |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 81 | }; |
| 82 | |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 83 | /* stream-interface operations for connections */ |
| 84 | struct si_ops si_applet_ops = { |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 85 | .chk_rcv = stream_int_chk_rcv_applet, |
| 86 | .chk_snd = stream_int_chk_snd_applet, |
| 87 | .shutr = stream_int_shutr_applet, |
| 88 | .shutw = stream_int_shutw_applet, |
| 89 | }; |
| 90 | |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 91 | |
| 92 | /* Functions used to communicate with a conn_stream. The first two may be used |
| 93 | * directly, the last one is mostly a wake callback. |
| 94 | */ |
| 95 | int si_cs_recv(struct conn_stream *cs); |
| 96 | int si_cs_send(struct conn_stream *cs); |
| 97 | static int si_cs_process(struct conn_stream *cs); |
| 98 | |
| 99 | |
Willy Tarreau | 74beec3 | 2012-10-03 00:41:04 +0200 | [diff] [blame] | 100 | struct data_cb si_conn_cb = { |
Olivier Houchard | 21df6cc | 2018-09-14 23:21:44 +0200 | [diff] [blame] | 101 | .wake = si_cs_process, |
Willy Tarreau | 8e0bb0a | 2016-11-24 16:58:12 +0100 | [diff] [blame] | 102 | .name = "STRM", |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 103 | }; |
| 104 | |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 105 | /* |
| 106 | * This function only has to be called once after a wakeup event in case of |
| 107 | * suspected timeout. It controls the stream interface timeouts and sets |
| 108 | * si->flags accordingly. It does NOT close anything, as this timeout may |
| 109 | * be used for any purpose. It returns 1 if the timeout fired, otherwise |
| 110 | * zero. |
| 111 | */ |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 112 | int si_check_timeouts(struct stream_interface *si) |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 113 | { |
| 114 | if (tick_is_expired(si->exp, now_ms)) { |
| 115 | si->flags |= SI_FL_EXP; |
| 116 | return 1; |
| 117 | } |
| 118 | return 0; |
| 119 | } |
| 120 | |
Willy Tarreau | fe3718a | 2008-11-30 18:14:12 +0100 | [diff] [blame] | 121 | /* to be called only when in SI_ST_DIS with SI_FL_ERR */ |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 122 | void si_report_error(struct stream_interface *si) |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 123 | { |
| 124 | if (!si->err_type) |
| 125 | si->err_type = SI_ET_DATA_ERR; |
| 126 | |
Willy Tarreau | 2bb4a96 | 2014-11-28 11:11:05 +0100 | [diff] [blame] | 127 | si_oc(si)->flags |= CF_WRITE_ERROR; |
| 128 | si_ic(si)->flags |= CF_READ_ERROR; |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 129 | } |
| 130 | |
| 131 | /* |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 132 | * Returns a message to the client ; the connection is shut down for read, |
| 133 | * and the request is cleared so that no server connection can be initiated. |
| 134 | * The buffer is marked for read shutdown on the other side to protect the |
| 135 | * 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] | 136 | * "chunk". If it is null, then an empty message is used. The reply buffer does |
| 137 | * not need to be empty before this, and its contents will not be overwritten. |
| 138 | * 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] | 139 | */ |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 140 | void si_retnclose(struct stream_interface *si, |
Willy Tarreau | 83061a8 | 2018-07-13 11:56:34 +0200 | [diff] [blame] | 141 | const struct buffer *msg) |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 142 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 143 | struct channel *ic = si_ic(si); |
| 144 | struct channel *oc = si_oc(si); |
| 145 | |
| 146 | channel_auto_read(ic); |
| 147 | channel_abort(ic); |
| 148 | channel_auto_close(ic); |
| 149 | channel_erase(ic); |
| 150 | channel_truncate(oc); |
Willy Tarreau | 798e128 | 2010-12-12 13:06:00 +0100 | [diff] [blame] | 151 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 152 | if (likely(msg && msg->data)) |
| 153 | co_inject(oc, msg->area, msg->data); |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 154 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 155 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
| 156 | channel_auto_read(oc); |
| 157 | channel_auto_close(oc); |
| 158 | channel_shutr_now(oc); |
Willy Tarreau | 5d881d0 | 2009-12-27 22:51:06 +0100 | [diff] [blame] | 159 | } |
| 160 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 161 | /* |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 162 | * This function performs a shutdown-read on a detached stream interface in a |
| 163 | * connected or init state (it does nothing for other states). It either shuts |
| 164 | * the read side or marks itself as closed. The buffer flags are updated to |
| 165 | * reflect the new state. If the stream interface has SI_FL_NOHALF, we also |
| 166 | * 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] | 167 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 168 | static void stream_int_shutr(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 169 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 170 | struct channel *ic = si_ic(si); |
| 171 | |
Willy Tarreau | abb5d42 | 2018-11-14 16:58:52 +0100 | [diff] [blame] | 172 | si_rx_shut_blk(si); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 173 | if (ic->flags & CF_SHUTR) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 174 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 175 | ic->flags |= CF_SHUTR; |
| 176 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 177 | |
Willy Tarreau | 4f283fa | 2019-06-05 14:34:03 +0200 | [diff] [blame] | 178 | if (!si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST)) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 179 | return; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 180 | |
Willy Tarreau | 2bb4a96 | 2014-11-28 11:11:05 +0100 | [diff] [blame] | 181 | if (si_oc(si)->flags & CF_SHUTW) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 182 | si->state = SI_ST_DIS; |
| 183 | si->exp = TICK_ETERNITY; |
Willy Tarreau | d8ccffe | 2010-09-07 16:16:50 +0200 | [diff] [blame] | 184 | } |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 185 | else if (si->flags & SI_FL_NOHALF) { |
| 186 | /* we want to immediately forward this close to the write side */ |
| 187 | return stream_int_shutw(si); |
| 188 | } |
Willy Tarreau | 0bd05ea | 2010-07-02 11:18:03 +0200 | [diff] [blame] | 189 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 190 | /* 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] | 191 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 192 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 193 | } |
| 194 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 195 | /* |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 196 | * This function performs a shutdown-write on a detached stream interface in a |
| 197 | * connected or init state (it does nothing for other states). It either shuts |
| 198 | * the write side or marks itself as closed. The buffer flags are updated to |
| 199 | * reflect the new state. It does also close everything if the SI was marked as |
| 200 | * 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] | 201 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 202 | static void stream_int_shutw(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 203 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 204 | struct channel *ic = si_ic(si); |
| 205 | struct channel *oc = si_oc(si); |
| 206 | |
| 207 | oc->flags &= ~CF_SHUTW_NOW; |
| 208 | if (oc->flags & CF_SHUTW) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 209 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 210 | oc->flags |= CF_SHUTW; |
| 211 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | 43e69dc | 2018-11-06 19:23:03 +0100 | [diff] [blame] | 212 | si_done_get(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 213 | |
Hongbo Long | e39683c | 2017-03-10 18:41:51 +0100 | [diff] [blame] | 214 | if (tick_isset(si->hcto)) { |
| 215 | ic->rto = si->hcto; |
| 216 | ic->rex = tick_add(now_ms, ic->rto); |
| 217 | } |
| 218 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 219 | switch (si->state) { |
Willy Tarreau | 4f283fa | 2019-06-05 14:34:03 +0200 | [diff] [blame] | 220 | case SI_ST_RDY: |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 221 | case SI_ST_EST: |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 222 | /* we have to shut before closing, otherwise some short messages |
| 223 | * may never leave the system, especially when there are remaining |
| 224 | * unread data in the socket input buffer, or when nolinger is set. |
| 225 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 226 | * no risk so we close both sides immediately. |
| 227 | */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 228 | if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) && |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 229 | !(ic->flags & (CF_SHUTR|CF_DONT_READ))) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 230 | return; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 231 | |
| 232 | /* fall through */ |
| 233 | case SI_ST_CON: |
| 234 | case SI_ST_CER: |
Willy Tarreau | 32d3ee9 | 2010-12-29 14:03:02 +0100 | [diff] [blame] | 235 | case SI_ST_QUE: |
| 236 | case SI_ST_TAR: |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 237 | /* Note that none of these states may happen with applets */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 238 | si->state = SI_ST_DIS; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 239 | default: |
Willy Tarreau | abb5d42 | 2018-11-14 16:58:52 +0100 | [diff] [blame] | 240 | si->flags &= ~SI_FL_NOLINGER; |
| 241 | si_rx_shut_blk(si); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 242 | ic->flags |= CF_SHUTR; |
| 243 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 244 | si->exp = TICK_ETERNITY; |
| 245 | } |
| 246 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 247 | /* 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] | 248 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 249 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 250 | } |
| 251 | |
| 252 | /* default chk_rcv function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 253 | static void stream_int_chk_rcv(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 254 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 255 | struct channel *ic = si_ic(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 256 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 257 | 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] | 258 | __FUNCTION__, |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 259 | si, si->state, ic->flags, si_oc(si)->flags); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 260 | |
Christopher Faulet | b3e0de4 | 2018-10-11 13:54:13 +0200 | [diff] [blame] | 261 | if (ic->pipe) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 262 | /* stop reading */ |
Willy Tarreau | db39843 | 2018-11-15 11:08:52 +0100 | [diff] [blame] | 263 | si_rx_room_blk(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 264 | } |
| 265 | else { |
| 266 | /* (re)start reading */ |
Willy Tarreau | 3c39a7d | 2019-06-14 14:42:29 +0200 | [diff] [blame] | 267 | tasklet_wakeup(si->wait_event.tasklet); |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 268 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 269 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 270 | } |
| 271 | } |
| 272 | |
| 273 | /* default chk_snd function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 274 | static void stream_int_chk_snd(struct stream_interface *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 | struct channel *oc = si_oc(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 277 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 278 | 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] | 279 | __FUNCTION__, |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 280 | si, si->state, si_ic(si)->flags, oc->flags); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 281 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 282 | if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW))) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 283 | return; |
| 284 | |
| 285 | if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 286 | channel_is_empty(oc)) /* called with nothing to send ! */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 287 | return; |
| 288 | |
| 289 | /* Otherwise there are remaining data to be sent in the buffer, |
| 290 | * so we tell the handler. |
| 291 | */ |
| 292 | si->flags &= ~SI_FL_WAIT_DATA; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 293 | if (!tick_isset(oc->wex)) |
| 294 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 295 | |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 296 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 297 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 298 | } |
| 299 | |
Willy Tarreau | a9ff5e6 | 2015-07-19 18:46:30 +0200 | [diff] [blame] | 300 | /* Register an applet to handle a stream_interface as a new appctx. The SI will |
| 301 | * wake it up everytime it is solicited. The appctx must be deleted by the task |
| 302 | * handler using si_release_endpoint(), possibly from within the function itself. |
| 303 | * It also pre-initializes the applet's context and returns it (or NULL in case |
| 304 | * it could not be allocated). |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 305 | */ |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 306 | struct appctx *si_register_handler(struct stream_interface *si, struct applet *app) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 307 | { |
Willy Tarreau | 0a23bcb | 2013-12-01 11:31:38 +0100 | [diff] [blame] | 308 | struct appctx *appctx; |
| 309 | |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 310 | 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] | 311 | |
Willy Tarreau | a7513f5 | 2015-04-05 00:15:26 +0200 | [diff] [blame] | 312 | appctx = si_alloc_appctx(si, app); |
Willy Tarreau | a69fc9f | 2014-12-22 19:34:00 +0100 | [diff] [blame] | 313 | if (!appctx) |
Willy Tarreau | 0a23bcb | 2013-12-01 11:31:38 +0100 | [diff] [blame] | 314 | return NULL; |
| 315 | |
Willy Tarreau | 0cd3bd6 | 2018-11-06 18:46:37 +0100 | [diff] [blame] | 316 | si_cant_get(si); |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 317 | appctx_wakeup(appctx); |
Willy Tarreau | 1fbe1c9 | 2013-12-01 09:35:41 +0100 | [diff] [blame] | 318 | return si_appctx(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 319 | } |
| 320 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 321 | /* 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] | 322 | * established. It returns 0 if it fails in a fatal way or needs to poll to go |
| 323 | * 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] | 324 | * flags (the bit is provided in <flag> by the caller). It is designed to be |
| 325 | * 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] | 326 | * Note that it can emit a PROXY line by relying on the other end's address |
| 327 | * when the connection is attached to a stream interface, or by resolving the |
| 328 | * local address otherwise (also called a LOCAL line). |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 329 | */ |
| 330 | int conn_si_send_proxy(struct connection *conn, unsigned int flag) |
| 331 | { |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 332 | /* we might have been called just after an asynchronous shutw */ |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 333 | if (conn->flags & CO_FL_SOCK_WR_SH) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 334 | goto out_error; |
| 335 | |
Willy Tarreau | d02cdd2 | 2013-12-15 10:23:20 +0100 | [diff] [blame] | 336 | if (!conn_ctrl_ready(conn)) |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 337 | goto out_error; |
| 338 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 339 | /* If we have a PROXY line to send, we'll use this to validate the |
| 340 | * connection, in which case the connection is validated only once |
| 341 | * we've sent the whole proxy line. Otherwise we use connect(). |
| 342 | */ |
Tim Duesterhus | 36839dc | 2019-02-26 17:09:51 +0100 | [diff] [blame] | 343 | if (conn->send_proxy_ofs) { |
Willy Tarreau | 6b1379f | 2018-11-18 21:38:19 +0100 | [diff] [blame] | 344 | const struct conn_stream *cs; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 345 | int ret; |
| 346 | |
Willy Tarreau | 6b1379f | 2018-11-18 21:38:19 +0100 | [diff] [blame] | 347 | cs = cs_get_first(conn); |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 348 | /* The target server expects a PROXY line to be sent first. |
| 349 | * If the send_proxy_ofs is negative, it corresponds to the |
| 350 | * offset to start sending from then end of the proxy string |
| 351 | * (which is recomputed every time since it's constant). If |
| 352 | * it is positive, it means we have to send from the start. |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 353 | * We can only send a "normal" PROXY line when the connection |
| 354 | * is attached to a stream interface. Otherwise we can only |
| 355 | * send a LOCAL line (eg: for use with health checks). |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 356 | */ |
Willy Tarreau | 6b1379f | 2018-11-18 21:38:19 +0100 | [diff] [blame] | 357 | |
| 358 | if (cs && cs->data_cb == &si_conn_cb) { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 359 | struct stream_interface *si = cs->data; |
| 360 | struct conn_stream *remote_cs = objt_cs(si_opposite(si)->end); |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 361 | ret = make_proxy_line(trash.area, trash.size, |
| 362 | objt_server(conn->target), |
| 363 | remote_cs ? remote_cs->conn : NULL); |
Olivier Houchard | 661167d | 2019-05-29 17:08:03 +0200 | [diff] [blame] | 364 | /* We may not have a conn_stream yet, if we don't |
| 365 | * know which mux to use, because it will be decided |
| 366 | * during the SSL handshake. In this case, there should |
| 367 | * be a session associated to the connection in |
| 368 | * conn->owner, and we know it is the session that |
| 369 | * initiated that connection, so we can just use |
| 370 | * its origin, which should contain the client |
| 371 | * connection. |
| 372 | */ |
| 373 | } else if (!cs && conn->owner) { |
| 374 | struct session *sess = conn->owner; |
| 375 | |
| 376 | ret = make_proxy_line(trash.area, trash.size, |
| 377 | objt_server(conn->target), |
| 378 | objt_conn(sess->origin)); |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 379 | } |
| 380 | else { |
| 381 | /* The target server expects a LOCAL line to be sent first. Retrieving |
| 382 | * local or remote addresses may fail until the connection is established. |
| 383 | */ |
Willy Tarreau | 7bb447c | 2019-07-17 11:40:51 +0200 | [diff] [blame] | 384 | if (!conn_get_src(conn) || !conn_get_dst(conn)) |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 385 | goto out_wait; |
| 386 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 387 | ret = make_proxy_line(trash.area, trash.size, |
| 388 | objt_server(conn->target), conn); |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 389 | } |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 390 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 391 | if (!ret) |
| 392 | goto out_error; |
| 393 | |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 394 | if (conn->send_proxy_ofs > 0) |
| 395 | conn->send_proxy_ofs = -ret; /* first call */ |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 396 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 397 | /* we have to send trash from (ret+sp for -sp bytes). If the |
| 398 | * data layer has a pending write, we'll also set MSG_MORE. |
| 399 | */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 400 | ret = conn_sock_send(conn, |
| 401 | trash.area + ret + conn->send_proxy_ofs, |
| 402 | -conn->send_proxy_ofs, |
Olivier Houchard | 1a0545f | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 403 | (conn->flags & CO_FL_XPRT_WR_ENA) ? MSG_MORE : 0); |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 404 | |
Willy Tarreau | 0a03c0f | 2015-03-13 00:05:28 +0100 | [diff] [blame] | 405 | if (ret < 0) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 406 | goto out_error; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 407 | |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 408 | conn->send_proxy_ofs += ret; /* becomes zero once complete */ |
| 409 | if (conn->send_proxy_ofs != 0) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 410 | goto out_wait; |
| 411 | |
| 412 | /* OK we've sent the whole line, we're connected */ |
| 413 | } |
| 414 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 415 | /* The connection is ready now, simply return and let the connection |
| 416 | * handler notify upper layers if needed. |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 417 | */ |
| 418 | if (conn->flags & CO_FL_WAIT_L4_CONN) |
| 419 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 420 | conn->flags &= ~flag; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 421 | return 1; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 422 | |
| 423 | out_error: |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 424 | /* Write error on the file descriptor */ |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 425 | conn->flags |= CO_FL_ERROR; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 426 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 427 | |
| 428 | out_wait: |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 429 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 430 | } |
| 431 | |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 432 | |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 433 | /* This function is the equivalent to si_update() except that it's |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 434 | * designed to be called from outside the stream handlers, typically the lower |
| 435 | * layers (applets, connections) after I/O completion. After updating the stream |
| 436 | * interface and timeouts, it will try to forward what can be forwarded, then to |
| 437 | * wake the associated task up if an important event requires special handling. |
Willy Tarreau | d0f5bbc | 2018-11-14 11:10:26 +0100 | [diff] [blame] | 438 | * It may update SI_FL_WAIT_DATA and/or SI_FL_RXBLK_ROOM, that the callers are |
Willy Tarreau | 0dfccb2 | 2018-10-25 13:55:20 +0200 | [diff] [blame] | 439 | * encouraged to watch to take appropriate action. |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 440 | * It should not be called from within the stream itself, si_update() |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 441 | * is designed for this. |
| 442 | */ |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 443 | static void stream_int_notify(struct stream_interface *si) |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 444 | { |
| 445 | struct channel *ic = si_ic(si); |
| 446 | struct channel *oc = si_oc(si); |
Willy Tarreau | 47baeb8 | 2018-11-15 07:46:57 +0100 | [diff] [blame] | 447 | struct stream_interface *sio = si_opposite(si); |
Christopher Faulet | d7607de | 2019-01-03 16:24:54 +0100 | [diff] [blame] | 448 | struct task *task = si_task(si); |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 449 | |
| 450 | /* process consumer side */ |
| 451 | if (channel_is_empty(oc)) { |
Olivier Houchard | e9bed53 | 2017-11-16 17:49:25 +0100 | [diff] [blame] | 452 | struct connection *conn = objt_cs(si->end) ? objt_cs(si->end)->conn : NULL; |
| 453 | |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 454 | if (((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) && |
Olivier Houchard | e9bed53 | 2017-11-16 17:49:25 +0100 | [diff] [blame] | 455 | (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] | 456 | si_shutw(si); |
| 457 | oc->wex = TICK_ETERNITY; |
| 458 | } |
| 459 | |
Willy Tarreau | 8cf9c8e | 2016-12-13 15:21:25 +0100 | [diff] [blame] | 460 | /* indicate that we may be waiting for data from the output channel or |
| 461 | * we're about to close and can't expect more data if SHUTW_NOW is there. |
| 462 | */ |
Christopher Faulet | b3e0de4 | 2018-10-11 13:54:13 +0200 | [diff] [blame] | 463 | if (!(oc->flags & (CF_SHUTW|CF_SHUTW_NOW))) |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 464 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | 8cf9c8e | 2016-12-13 15:21:25 +0100 | [diff] [blame] | 465 | else if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) |
| 466 | si->flags &= ~SI_FL_WAIT_DATA; |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 467 | |
| 468 | /* update OC timeouts and wake the other side up if it's waiting for room */ |
| 469 | if (oc->flags & CF_WRITE_ACTIVITY) { |
| 470 | if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
| 471 | !channel_is_empty(oc)) |
| 472 | if (tick_isset(oc->wex)) |
| 473 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
| 474 | |
| 475 | if (!(si->flags & SI_FL_INDEP_STR)) |
| 476 | if (tick_isset(ic->rex)) |
| 477 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 478 | } |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 479 | |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 480 | if (oc->flags & CF_DONT_READ) |
| 481 | si_rx_chan_blk(sio); |
| 482 | else |
| 483 | si_rx_chan_rdy(sio); |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 484 | |
| 485 | /* Notify the other side when we've injected data into the IC that |
| 486 | * needs to be forwarded. We can do fast-forwarding as soon as there |
| 487 | * are output data, but we avoid doing this if some of the data are |
| 488 | * not yet scheduled for being forwarded, because it is very likely |
| 489 | * that it will be done again immediately afterwards once the following |
Willy Tarreau | d0f5bbc | 2018-11-14 11:10:26 +0100 | [diff] [blame] | 490 | * data are parsed (eg: HTTP chunking). We only SI_FL_RXBLK_ROOM once |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 491 | * we've emptied *some* of the output buffer, and not just when there |
| 492 | * is available room, because applets are often forced to stop before |
| 493 | * the buffer is full. We must not stop based on input data alone because |
| 494 | * an HTTP parser might need more data to complete the parsing. |
| 495 | */ |
| 496 | if (!channel_is_empty(ic) && |
Willy Tarreau | 47baeb8 | 2018-11-15 07:46:57 +0100 | [diff] [blame] | 497 | (sio->flags & SI_FL_WAIT_DATA) && |
Willy Tarreau | 89b6a2b | 2018-11-18 15:46:10 +0100 | [diff] [blame] | 498 | (!(ic->flags & CF_EXPECT_MORE) || c_full(ic) || ci_data(ic) == 0 || ic->pipe)) { |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 499 | int new_len, last_len; |
| 500 | |
Willy Tarreau | 77e478c | 2018-06-19 07:03:14 +0200 | [diff] [blame] | 501 | last_len = co_data(ic); |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 502 | if (ic->pipe) |
| 503 | last_len += ic->pipe->data; |
| 504 | |
Willy Tarreau | 47baeb8 | 2018-11-15 07:46:57 +0100 | [diff] [blame] | 505 | si_chk_snd(sio); |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 506 | |
Willy Tarreau | 77e478c | 2018-06-19 07:03:14 +0200 | [diff] [blame] | 507 | new_len = co_data(ic); |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 508 | if (ic->pipe) |
| 509 | new_len += ic->pipe->data; |
| 510 | |
| 511 | /* check if the consumer has freed some space either in the |
| 512 | * buffer or in the pipe. |
| 513 | */ |
Willy Tarreau | 47baeb8 | 2018-11-15 07:46:57 +0100 | [diff] [blame] | 514 | if (new_len < last_len) |
Willy Tarreau | db39843 | 2018-11-15 11:08:52 +0100 | [diff] [blame] | 515 | si_rx_room_rdy(si); |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 516 | } |
| 517 | |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 518 | if (!(ic->flags & CF_DONT_READ)) |
| 519 | si_rx_chan_rdy(si); |
| 520 | |
Willy Tarreau | 47baeb8 | 2018-11-15 07:46:57 +0100 | [diff] [blame] | 521 | si_chk_rcv(si); |
| 522 | si_chk_rcv(sio); |
| 523 | |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 524 | if (si_rx_blocked(si)) { |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 525 | ic->rex = TICK_ETERNITY; |
| 526 | } |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 527 | else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL)) == CF_READ_PARTIAL) { |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 528 | /* we must re-enable reading if si_chk_snd() has freed some space */ |
| 529 | if (!(ic->flags & CF_READ_NOEXP) && tick_isset(ic->rex)) |
| 530 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
| 531 | } |
| 532 | |
| 533 | /* wake the task up only when needed */ |
| 534 | if (/* changes on the production side */ |
| 535 | (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) || |
Willy Tarreau | 4f283fa | 2019-06-05 14:34:03 +0200 | [diff] [blame] | 536 | !si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST) || |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 537 | (si->flags & SI_FL_ERR) || |
| 538 | ((ic->flags & CF_READ_PARTIAL) && |
Christopher Faulet | 297d3e2 | 2019-03-22 14:16:14 +0100 | [diff] [blame] | 539 | ((ic->flags & CF_EOI) || !ic->to_forward || sio->state != SI_ST_EST)) || |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 540 | |
| 541 | /* changes on the consumption side */ |
| 542 | (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) || |
Willy Tarreau | ede3d88 | 2018-10-24 17:17:56 +0200 | [diff] [blame] | 543 | ((oc->flags & CF_WRITE_ACTIVITY) && |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 544 | ((oc->flags & CF_SHUTW) || |
Willy Tarreau | 78f5ff8 | 2018-12-19 11:00:00 +0100 | [diff] [blame] | 545 | (((oc->flags & CF_WAKE_WRITE) || |
| 546 | !(oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW|CF_SHUTW))) && |
Willy Tarreau | 47baeb8 | 2018-11-15 07:46:57 +0100 | [diff] [blame] | 547 | (sio->state != SI_ST_EST || |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 548 | (channel_is_empty(oc) && !oc->to_forward)))))) { |
Christopher Faulet | d7607de | 2019-01-03 16:24:54 +0100 | [diff] [blame] | 549 | task_wakeup(task, TASK_WOKEN_IO); |
| 550 | } |
| 551 | else { |
| 552 | /* Update expiration date for the task and requeue it */ |
| 553 | task->expire = tick_first((tick_is_expired(task->expire, now_ms) ? 0 : task->expire), |
| 554 | tick_first(tick_first(ic->rex, ic->wex), |
| 555 | tick_first(oc->rex, oc->wex))); |
Willy Tarreau | 45bcb37 | 2019-08-01 18:51:38 +0200 | [diff] [blame] | 556 | |
| 557 | task->expire = tick_first(task->expire, ic->analyse_exp); |
| 558 | task->expire = tick_first(task->expire, oc->analyse_exp); |
| 559 | |
| 560 | if (si->exp) |
| 561 | task->expire = tick_first(task->expire, si->exp); |
| 562 | |
| 563 | if (sio->exp) |
| 564 | task->expire = tick_first(task->expire, sio->exp); |
| 565 | |
Christopher Faulet | d7607de | 2019-01-03 16:24:54 +0100 | [diff] [blame] | 566 | task_queue(task); |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 567 | } |
| 568 | if (ic->flags & CF_READ_ACTIVITY) |
| 569 | ic->flags &= ~CF_READ_DONTWAIT; |
Willy Tarreau | 615f28b | 2015-09-23 18:40:09 +0200 | [diff] [blame] | 570 | } |
| 571 | |
| 572 | |
Olivier Houchard | c2aa711 | 2018-09-11 18:27:21 +0200 | [diff] [blame] | 573 | /* Called by I/O handlers after completion.. It propagates |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 574 | * connection flags to the stream interface, updates the stream (which may or |
| 575 | * may not take this opportunity to try to forward data), then update the |
| 576 | * connection's polling based on the channels and stream interface's final |
| 577 | * states. The function always returns 0. |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 578 | */ |
Olivier Houchard | c2aa711 | 2018-09-11 18:27:21 +0200 | [diff] [blame] | 579 | static int si_cs_process(struct conn_stream *cs) |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 580 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 581 | struct connection *conn = cs->conn; |
| 582 | struct stream_interface *si = cs->data; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 583 | struct channel *ic = si_ic(si); |
| 584 | struct channel *oc = si_oc(si); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 585 | |
Olivier Houchard | c7ffa91 | 2018-08-28 19:37:41 +0200 | [diff] [blame] | 586 | /* If we have data to send, try it now */ |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 587 | if (!channel_is_empty(oc) && !(si->wait_event.events & SUB_RETRY_SEND)) |
Willy Tarreau | 908d26f | 2018-10-25 14:02:47 +0200 | [diff] [blame] | 588 | si_cs_send(cs); |
| 589 | |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 590 | /* First step, report to the stream-int what was detected at the |
| 591 | * connection layer : errors and connection establishment. |
Olivier Houchard | c31e2cb | 2019-06-24 16:08:08 +0200 | [diff] [blame] | 592 | * Only add SI_FL_ERR if we're connected, or we're attempting to |
| 593 | * connect, we may get there because we got woken up, but only run |
| 594 | * after process_stream() noticed there were an error, and decided |
| 595 | * to retry to connect, the connection may still have CO_FL_ERROR, |
| 596 | * and we don't want to add SI_FL_ERR back |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 597 | */ |
Olivier Houchard | c31e2cb | 2019-06-24 16:08:08 +0200 | [diff] [blame] | 598 | if (si->state >= SI_ST_CON && |
| 599 | (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)) |
Willy Tarreau | 3c55ec2 | 2012-07-23 19:19:51 +0200 | [diff] [blame] | 600 | si->flags |= SI_FL_ERR; |
| 601 | |
Olivier Houchard | ccaa7de | 2017-10-02 11:51:03 +0200 | [diff] [blame] | 602 | /* If we had early data, and the handshake ended, then |
| 603 | * we can remove the flag, and attempt to wake the task up, |
| 604 | * in the event there's an analyser waiting for the end of |
| 605 | * the handshake. |
| 606 | */ |
Olivier Houchard | 6fa63d9 | 2017-11-27 18:41:32 +0100 | [diff] [blame] | 607 | if (!(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS)) && |
| 608 | (cs->flags & CS_FL_WAIT_FOR_HS)) { |
| 609 | cs->flags &= ~CS_FL_WAIT_FOR_HS; |
Olivier Houchard | ccaa7de | 2017-10-02 11:51:03 +0200 | [diff] [blame] | 610 | task_wakeup(si_task(si), TASK_WOKEN_MSG); |
| 611 | } |
| 612 | |
Willy Tarreau | 7ab22adb | 2019-06-05 14:53:22 +0200 | [diff] [blame] | 613 | if (!si_state_in(si->state, SI_SB_EST|SI_SB_DIS|SI_SB_CLO) && |
Willy Tarreau | 52821e2 | 2017-03-18 17:11:37 +0100 | [diff] [blame] | 614 | (conn->flags & (CO_FL_CONNECTED | CO_FL_HANDSHAKE)) == CO_FL_CONNECTED) { |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 615 | si->exp = TICK_ETERNITY; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 616 | oc->flags |= CF_WRITE_NULL; |
Willy Tarreau | b27f54a | 2019-06-05 16:43:44 +0200 | [diff] [blame] | 617 | if (si->state == SI_ST_CON) |
| 618 | si->state = SI_ST_RDY; |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 619 | } |
| 620 | |
Christopher Faulet | 297d3e2 | 2019-03-22 14:16:14 +0100 | [diff] [blame] | 621 | /* Report EOI on the channel if it was reached from the mux point of |
| 622 | * view. */ |
| 623 | if ((cs->flags & CS_FL_EOI) && !(ic->flags & CF_EOI)) |
Christopher Faulet | 8e9e3ef | 2019-05-17 09:14:10 +0200 | [diff] [blame] | 624 | ic->flags |= (CF_EOI|CF_READ_PARTIAL); |
Christopher Faulet | 203b2b0 | 2019-03-08 09:23:46 +0100 | [diff] [blame] | 625 | |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 626 | /* Second step : update the stream-int and channels, try to forward any |
| 627 | * pending data, then possibly wake the stream up based on the new |
| 628 | * stream-int status. |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 629 | */ |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 630 | stream_int_notify(si); |
Willy Tarreau | a64c703 | 2019-08-01 14:17:02 +0200 | [diff] [blame] | 631 | stream_release_buffers(si_strm(si)); |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 632 | return 0; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 633 | } |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 634 | |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 635 | /* |
| 636 | * This function is called to send buffer data to a stream socket. |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 637 | * It calls the mux layer's snd_buf function. It relies on the |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 638 | * caller to commit polling changes. The caller should check conn->flags |
| 639 | * for errors. |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 640 | */ |
Olivier Houchard | 0e367bb | 2018-09-14 19:41:13 +0200 | [diff] [blame] | 641 | int si_cs_send(struct conn_stream *cs) |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 642 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 643 | struct connection *conn = cs->conn; |
| 644 | struct stream_interface *si = cs->data; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 645 | struct channel *oc = si_oc(si); |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 646 | int ret; |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 647 | int did_send = 0; |
| 648 | |
Willy Tarreau | bddf7fc | 2018-12-19 17:17:10 +0100 | [diff] [blame] | 649 | if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) { |
Olivier Houchard | c31e2cb | 2019-06-24 16:08:08 +0200 | [diff] [blame] | 650 | /* We're probably there because the tasklet was woken up, |
| 651 | * but process_stream() ran before, detected there were an |
| 652 | * error and put the si back to SI_ST_TAR. There's still |
| 653 | * CO_FL_ERROR on the connection but we don't want to add |
| 654 | * SI_FL_ERR back, so give up |
| 655 | */ |
| 656 | if (si->state < SI_ST_CON) |
| 657 | return 0; |
Willy Tarreau | bddf7fc | 2018-12-19 17:17:10 +0100 | [diff] [blame] | 658 | si->flags |= SI_FL_ERR; |
Olivier Houchard | c2aa711 | 2018-09-11 18:27:21 +0200 | [diff] [blame] | 659 | return 1; |
Willy Tarreau | bddf7fc | 2018-12-19 17:17:10 +0100 | [diff] [blame] | 660 | } |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 661 | |
Christopher Faulet | 328ed22 | 2019-09-23 15:57:29 +0200 | [diff] [blame] | 662 | /* We're already waiting to be able to send, give up */ |
| 663 | if (si->wait_event.events & SUB_RETRY_SEND) |
| 664 | return 0; |
| 665 | |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 666 | /* we might have been called just after an asynchronous shutw */ |
Christopher Faulet | 55dec0d | 2018-11-20 10:30:02 +0100 | [diff] [blame] | 667 | if (conn->flags & CO_FL_SOCK_WR_SH || oc->flags & CF_SHUTW) |
Olivier Houchard | c2aa711 | 2018-09-11 18:27:21 +0200 | [diff] [blame] | 668 | return 1; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 669 | |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 670 | if (oc->pipe && conn->xprt->snd_pipe && conn->mux->snd_pipe) { |
| 671 | ret = conn->mux->snd_pipe(cs, oc->pipe); |
Christopher Faulet | 86162db | 2019-07-05 11:49:11 +0200 | [diff] [blame] | 672 | if (ret > 0) |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 673 | did_send = 1; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 674 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 675 | if (!oc->pipe->data) { |
| 676 | put_pipe(oc->pipe); |
| 677 | oc->pipe = NULL; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 678 | } |
| 679 | |
Christopher Faulet | 3f76f4c | 2018-11-20 10:21:08 +0100 | [diff] [blame] | 680 | if (oc->pipe) |
| 681 | goto end; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 682 | } |
| 683 | |
| 684 | /* At this point, the pipe is empty, but we may still have data pending |
| 685 | * in the normal buffer. |
| 686 | */ |
Christopher Faulet | 55dec0d | 2018-11-20 10:30:02 +0100 | [diff] [blame] | 687 | if (co_data(oc)) { |
| 688 | /* when we're here, we already know that there is no spliced |
| 689 | * data left, and that there are sendable buffered data. |
| 690 | */ |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 691 | |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 692 | /* check if we want to inform the kernel that we're interested in |
| 693 | * sending more data after this call. We want this if : |
| 694 | * - we're about to close after this last send and want to merge |
| 695 | * the ongoing FIN with the last segment. |
| 696 | * - we know we can't send everything at once and must get back |
| 697 | * here because of unaligned data |
| 698 | * - there is still a finite amount of data to forward |
| 699 | * The test is arranged so that the most common case does only 2 |
| 700 | * tests. |
| 701 | */ |
Willy Tarreau | 1049b1f | 2014-02-02 01:51:17 +0100 | [diff] [blame] | 702 | unsigned int send_flag = 0; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 703 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 704 | if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) && |
| 705 | ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) || |
Willy Tarreau | 4ac4928 | 2017-10-17 16:33:46 +0200 | [diff] [blame] | 706 | (oc->flags & CF_EXPECT_MORE))) || |
Willy Tarreau | ecd2e15 | 2017-11-07 15:07:25 +0100 | [diff] [blame] | 707 | ((oc->flags & CF_ISRESP) && |
| 708 | ((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] | 709 | send_flag |= CO_SFL_MSG_MORE; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 710 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 711 | if (oc->flags & CF_STREAMER) |
Willy Tarreau | 7bed945 | 2014-02-02 02:00:24 +0100 | [diff] [blame] | 712 | send_flag |= CO_SFL_STREAMER; |
| 713 | |
Olivier Houchard | a254a37 | 2019-04-05 15:30:12 +0200 | [diff] [blame] | 714 | if ((si->flags & SI_FL_L7_RETRY) && !b_data(&si->l7_buffer)) { |
Olivier Houchard | ce1a029 | 2019-05-17 15:38:29 +0200 | [diff] [blame] | 715 | struct stream *s = si_strm(si); |
Olivier Houchard | a254a37 | 2019-04-05 15:30:12 +0200 | [diff] [blame] | 716 | /* If we want to be able to do L7 retries, copy |
| 717 | * the data we're about to send, so that we are able |
| 718 | * to resend them if needed |
| 719 | */ |
| 720 | /* Try to allocate a buffer if we had none. |
| 721 | * If it fails, the next test will just |
| 722 | * disable the l7 retries by setting |
| 723 | * l7_conn_retries to 0. |
| 724 | */ |
Olivier Houchard | ce1a029 | 2019-05-17 15:38:29 +0200 | [diff] [blame] | 725 | if (!s->txn || (s->txn->req.msg_state != HTTP_MSG_DONE)) |
Olivier Houchard | a254a37 | 2019-04-05 15:30:12 +0200 | [diff] [blame] | 726 | si->flags &= ~SI_FL_L7_RETRY; |
| 727 | else { |
| 728 | if (b_is_null(&si->l7_buffer)) |
| 729 | b_alloc(&si->l7_buffer); |
| 730 | if (b_is_null(&si->l7_buffer)) |
| 731 | si->flags &= ~SI_FL_L7_RETRY; |
| 732 | else { |
| 733 | memcpy(b_orig(&si->l7_buffer), |
| 734 | b_orig(&oc->buf), |
| 735 | b_size(&oc->buf)); |
| 736 | si->l7_buffer.head = co_data(oc); |
| 737 | b_add(&si->l7_buffer, co_data(oc)); |
| 738 | } |
| 739 | |
| 740 | } |
| 741 | } |
| 742 | |
Olivier Houchard | ed0f207 | 2018-08-16 15:41:52 +0200 | [diff] [blame] | 743 | ret = cs->conn->mux->snd_buf(cs, &oc->buf, co_data(oc), send_flag); |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 744 | if (ret > 0) { |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 745 | did_send = 1; |
Willy Tarreau | 77e478c | 2018-06-19 07:03:14 +0200 | [diff] [blame] | 746 | co_set_data(oc, co_data(oc) - ret); |
Willy Tarreau | deccd11 | 2018-06-14 18:38:55 +0200 | [diff] [blame] | 747 | c_realign_if_empty(oc); |
| 748 | |
| 749 | if (!co_data(oc)) { |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 750 | /* 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] | 751 | oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT); |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 752 | } |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 753 | /* if some data remain in the buffer, it's only because the |
| 754 | * system buffers are full, we will try next time. |
| 755 | */ |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 756 | } |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 757 | } |
Christopher Faulet | 55dec0d | 2018-11-20 10:30:02 +0100 | [diff] [blame] | 758 | |
Willy Tarreau | f6975aa | 2018-11-15 14:33:05 +0100 | [diff] [blame] | 759 | end: |
Christopher Faulet | 86162db | 2019-07-05 11:49:11 +0200 | [diff] [blame] | 760 | if (did_send) { |
| 761 | oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA; |
| 762 | if (si->state == SI_ST_CON) |
| 763 | si->state = SI_ST_RDY; |
Christopher Faulet | 037b3eb | 2019-07-05 13:44:29 +0200 | [diff] [blame] | 764 | |
| 765 | si_rx_room_rdy(si_opposite(si)); |
Christopher Faulet | 86162db | 2019-07-05 11:49:11 +0200 | [diff] [blame] | 766 | } |
| 767 | |
| 768 | if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) { |
| 769 | si->flags |= SI_FL_ERR; |
| 770 | return 1; |
| 771 | } |
| 772 | |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 773 | /* We couldn't send all of our data, let the mux know we'd like to send more */ |
Willy Tarreau | 691fe39 | 2018-11-12 18:48:52 +0100 | [diff] [blame] | 774 | if (!channel_is_empty(oc)) |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 775 | conn->mux->subscribe(cs, SUB_RETRY_SEND, &si->wait_event); |
Olivier Houchard | f653528 | 2018-08-31 17:29:12 +0200 | [diff] [blame] | 776 | return did_send; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 777 | } |
| 778 | |
Willy Tarreau | 8ccd208 | 2018-11-07 07:47:52 +0100 | [diff] [blame] | 779 | /* This is the ->process() function for any stream-interface's wait_event task. |
| 780 | * It's assigned during the stream-interface's initialization, for any type of |
| 781 | * stream interface. Thus it is always safe to perform a tasklet_wakeup() on a |
| 782 | * stream interface, as the presence of the CS is checked there. |
| 783 | */ |
Olivier Houchard | 91894cb | 2018-08-02 18:06:28 +0200 | [diff] [blame] | 784 | struct task *si_cs_io_cb(struct task *t, void *ctx, unsigned short state) |
| 785 | { |
Olivier Houchard | 8f0b4c6 | 2018-08-02 18:21:38 +0200 | [diff] [blame] | 786 | struct stream_interface *si = ctx; |
Olivier Houchard | a6ff035 | 2018-08-21 15:59:43 +0200 | [diff] [blame] | 787 | struct conn_stream *cs = objt_cs(si->end); |
Olivier Houchard | f653528 | 2018-08-31 17:29:12 +0200 | [diff] [blame] | 788 | int ret = 0; |
Olivier Houchard | a6ff035 | 2018-08-21 15:59:43 +0200 | [diff] [blame] | 789 | |
| 790 | if (!cs) |
| 791 | return NULL; |
Willy Tarreau | 8ccd208 | 2018-11-07 07:47:52 +0100 | [diff] [blame] | 792 | |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 793 | if (!(si->wait_event.events & SUB_RETRY_SEND) && !channel_is_empty(si_oc(si))) |
Olivier Houchard | f653528 | 2018-08-31 17:29:12 +0200 | [diff] [blame] | 794 | ret = si_cs_send(cs); |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 795 | if (!(si->wait_event.events & SUB_RETRY_RECV)) |
Olivier Houchard | f653528 | 2018-08-31 17:29:12 +0200 | [diff] [blame] | 796 | ret |= si_cs_recv(cs); |
| 797 | if (ret != 0) |
Olivier Houchard | c2aa711 | 2018-09-11 18:27:21 +0200 | [diff] [blame] | 798 | si_cs_process(cs); |
Olivier Houchard | f653528 | 2018-08-31 17:29:12 +0200 | [diff] [blame] | 799 | |
Willy Tarreau | a64c703 | 2019-08-01 14:17:02 +0200 | [diff] [blame] | 800 | stream_release_buffers(si_strm(si)); |
Olivier Houchard | 91894cb | 2018-08-02 18:06:28 +0200 | [diff] [blame] | 801 | return (NULL); |
| 802 | } |
| 803 | |
Willy Tarreau | 25f1310 | 2015-09-24 11:32:22 +0200 | [diff] [blame] | 804 | /* This function is designed to be called from within the stream handler to |
Willy Tarreau | 236c429 | 2019-06-06 08:19:20 +0200 | [diff] [blame] | 805 | * update the input channel's expiration timer and the stream interface's |
| 806 | * Rx flags based on the channel's flags. It needs to be called only once |
| 807 | * after the channel's flags have settled down, and before they are cleared, |
| 808 | * though it doesn't harm to call it as often as desired (it just slightly |
| 809 | * hurts performance). It must not be called from outside of the stream |
| 810 | * handler, as what it does will be used to compute the stream task's |
| 811 | * expiration. |
Willy Tarreau | 25f1310 | 2015-09-24 11:32:22 +0200 | [diff] [blame] | 812 | */ |
Willy Tarreau | 236c429 | 2019-06-06 08:19:20 +0200 | [diff] [blame] | 813 | void si_update_rx(struct stream_interface *si) |
Willy Tarreau | 25f1310 | 2015-09-24 11:32:22 +0200 | [diff] [blame] | 814 | { |
| 815 | struct channel *ic = si_ic(si); |
Willy Tarreau | 25f1310 | 2015-09-24 11:32:22 +0200 | [diff] [blame] | 816 | |
Willy Tarreau | 236c429 | 2019-06-06 08:19:20 +0200 | [diff] [blame] | 817 | if (ic->flags & CF_SHUTR) { |
| 818 | si_rx_shut_blk(si); |
| 819 | return; |
| 820 | } |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 821 | |
Willy Tarreau | 236c429 | 2019-06-06 08:19:20 +0200 | [diff] [blame] | 822 | /* Read not closed, update FD status and timeout for reads */ |
| 823 | if (ic->flags & CF_DONT_READ) |
| 824 | si_rx_chan_blk(si); |
| 825 | else |
| 826 | si_rx_chan_rdy(si); |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 827 | |
Willy Tarreau | 236c429 | 2019-06-06 08:19:20 +0200 | [diff] [blame] | 828 | if (!channel_is_empty(ic)) { |
| 829 | /* stop reading, imposed by channel's policy or contents */ |
| 830 | si_rx_room_blk(si); |
Willy Tarreau | 25f1310 | 2015-09-24 11:32:22 +0200 | [diff] [blame] | 831 | } |
Willy Tarreau | 236c429 | 2019-06-06 08:19:20 +0200 | [diff] [blame] | 832 | else { |
| 833 | /* (re)start reading and update timeout. Note: we don't recompute the timeout |
| 834 | * everytime we get here, otherwise it would risk never to expire. We only |
| 835 | * update it if is was not yet set. The stream socket handler will already |
| 836 | * have updated it if there has been a completed I/O. |
| 837 | */ |
| 838 | si_rx_room_rdy(si); |
| 839 | } |
| 840 | if (si->flags & SI_FL_RXBLK_ANY & ~SI_FL_RX_WAIT_EP) |
| 841 | ic->rex = TICK_ETERNITY; |
| 842 | else if (!(ic->flags & CF_READ_NOEXP) && !tick_isset(ic->rex)) |
| 843 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
Willy Tarreau | 25f1310 | 2015-09-24 11:32:22 +0200 | [diff] [blame] | 844 | |
Willy Tarreau | 236c429 | 2019-06-06 08:19:20 +0200 | [diff] [blame] | 845 | si_chk_rcv(si); |
| 846 | } |
| 847 | |
| 848 | /* This function is designed to be called from within the stream handler to |
| 849 | * update the output channel's expiration timer and the stream interface's |
| 850 | * Tx flags based on the channel's flags. It needs to be called only once |
| 851 | * after the channel's flags have settled down, and before they are cleared, |
| 852 | * though it doesn't harm to call it as often as desired (it just slightly |
| 853 | * hurts performance). It must not be called from outside of the stream |
| 854 | * handler, as what it does will be used to compute the stream task's |
| 855 | * expiration. |
| 856 | */ |
| 857 | void si_update_tx(struct stream_interface *si) |
| 858 | { |
| 859 | struct channel *oc = si_oc(si); |
| 860 | struct channel *ic = si_ic(si); |
| 861 | |
| 862 | if (oc->flags & CF_SHUTW) |
| 863 | return; |
| 864 | |
| 865 | /* Write not closed, update FD status and timeout for writes */ |
| 866 | if (channel_is_empty(oc)) { |
| 867 | /* stop writing */ |
| 868 | if (!(si->flags & SI_FL_WAIT_DATA)) { |
| 869 | if ((oc->flags & CF_SHUTW_NOW) == 0) |
| 870 | si->flags |= SI_FL_WAIT_DATA; |
| 871 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | 25f1310 | 2015-09-24 11:32:22 +0200 | [diff] [blame] | 872 | } |
Willy Tarreau | 236c429 | 2019-06-06 08:19:20 +0200 | [diff] [blame] | 873 | return; |
| 874 | } |
| 875 | |
| 876 | /* (re)start writing and update timeout. Note: we don't recompute the timeout |
| 877 | * everytime we get here, otherwise it would risk never to expire. We only |
| 878 | * update it if is was not yet set. The stream socket handler will already |
| 879 | * have updated it if there has been a completed I/O. |
| 880 | */ |
| 881 | si->flags &= ~SI_FL_WAIT_DATA; |
| 882 | if (!tick_isset(oc->wex)) { |
| 883 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
| 884 | if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
| 885 | /* Note: depending on the protocol, we don't know if we're waiting |
| 886 | * for incoming data or not. So in order to prevent the socket from |
| 887 | * expiring read timeouts during writes, we refresh the read timeout, |
| 888 | * except if it was already infinite or if we have explicitly setup |
| 889 | * independent streams. |
Willy Tarreau | 25f1310 | 2015-09-24 11:32:22 +0200 | [diff] [blame] | 890 | */ |
Willy Tarreau | 236c429 | 2019-06-06 08:19:20 +0200 | [diff] [blame] | 891 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
Willy Tarreau | 25f1310 | 2015-09-24 11:32:22 +0200 | [diff] [blame] | 892 | } |
| 893 | } |
| 894 | } |
| 895 | |
Willy Tarreau | 3b285d7 | 2019-06-06 08:20:17 +0200 | [diff] [blame] | 896 | /* perform a synchronous send() for the stream interface. The CF_WRITE_NULL and |
| 897 | * CF_WRITE_PARTIAL flags are cleared prior to the attempt, and will possibly |
| 898 | * be updated in case of success. |
| 899 | */ |
| 900 | void si_sync_send(struct stream_interface *si) |
| 901 | { |
| 902 | struct channel *oc = si_oc(si); |
| 903 | struct conn_stream *cs; |
| 904 | |
| 905 | oc->flags &= ~(CF_WRITE_NULL|CF_WRITE_PARTIAL); |
| 906 | |
| 907 | if (oc->flags & CF_SHUTW) |
| 908 | return; |
| 909 | |
| 910 | if (channel_is_empty(oc)) |
| 911 | return; |
| 912 | |
| 913 | if (!si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST)) |
| 914 | return; |
| 915 | |
| 916 | cs = objt_cs(si->end); |
| 917 | if (!cs) |
| 918 | return; |
| 919 | |
Christopher Faulet | 037b3eb | 2019-07-05 13:44:29 +0200 | [diff] [blame] | 920 | si_cs_send(cs); |
Willy Tarreau | 3b285d7 | 2019-06-06 08:20:17 +0200 | [diff] [blame] | 921 | } |
| 922 | |
Willy Tarreau | d14844a | 2018-11-08 18:15:29 +0100 | [diff] [blame] | 923 | /* Updates at once the channel flags, and timers of both stream interfaces of a |
| 924 | * same stream, to complete the work after the analysers, then updates the data |
| 925 | * layer below. This will ensure that any synchronous update performed at the |
| 926 | * data layer will be reflected in the channel flags and/or stream-interface. |
Willy Tarreau | 829bd47 | 2019-06-06 09:17:23 +0200 | [diff] [blame] | 927 | * Note that this does not change the stream interface's current state, though |
| 928 | * it updates the previous state to the current one. |
Willy Tarreau | d14844a | 2018-11-08 18:15:29 +0100 | [diff] [blame] | 929 | */ |
| 930 | void si_update_both(struct stream_interface *si_f, struct stream_interface *si_b) |
| 931 | { |
| 932 | struct channel *req = si_ic(si_f); |
| 933 | struct channel *res = si_oc(si_f); |
Willy Tarreau | d14844a | 2018-11-08 18:15:29 +0100 | [diff] [blame] | 934 | |
| 935 | req->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL); |
| 936 | res->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL); |
| 937 | |
Willy Tarreau | d14844a | 2018-11-08 18:15:29 +0100 | [diff] [blame] | 938 | si_f->prev_state = si_f->state; |
| 939 | si_b->prev_state = si_b->state; |
| 940 | |
Willy Tarreau | bf89ff3 | 2018-11-09 14:59:25 +0100 | [diff] [blame] | 941 | /* let's recompute both sides states */ |
Willy Tarreau | 4f283fa | 2019-06-05 14:34:03 +0200 | [diff] [blame] | 942 | if (si_state_in(si_f->state, SI_SB_RDY|SI_SB_EST)) |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 943 | si_update(si_f); |
Willy Tarreau | bf89ff3 | 2018-11-09 14:59:25 +0100 | [diff] [blame] | 944 | |
Willy Tarreau | 4f283fa | 2019-06-05 14:34:03 +0200 | [diff] [blame] | 945 | if (si_state_in(si_b->state, SI_SB_RDY|SI_SB_EST)) |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 946 | si_update(si_b); |
Willy Tarreau | bf89ff3 | 2018-11-09 14:59:25 +0100 | [diff] [blame] | 947 | |
| 948 | /* stream ints are processed outside of process_stream() and must be |
| 949 | * handled at the latest moment. |
| 950 | */ |
| 951 | if (obj_type(si_f->end) == OBJ_TYPE_APPCTX && |
Willy Tarreau | 32742fd | 2018-11-14 14:07:59 +0100 | [diff] [blame] | 952 | ((si_rx_endp_ready(si_f) && !si_rx_blocked(si_f)) || |
| 953 | (si_tx_endp_ready(si_f) && !si_tx_blocked(si_f)))) |
Willy Tarreau | bf89ff3 | 2018-11-09 14:59:25 +0100 | [diff] [blame] | 954 | appctx_wakeup(si_appctx(si_f)); |
Willy Tarreau | d14844a | 2018-11-08 18:15:29 +0100 | [diff] [blame] | 955 | |
Willy Tarreau | bf89ff3 | 2018-11-09 14:59:25 +0100 | [diff] [blame] | 956 | if (obj_type(si_b->end) == OBJ_TYPE_APPCTX && |
Willy Tarreau | 32742fd | 2018-11-14 14:07:59 +0100 | [diff] [blame] | 957 | ((si_rx_endp_ready(si_b) && !si_rx_blocked(si_b)) || |
| 958 | (si_tx_endp_ready(si_b) && !si_tx_blocked(si_b)))) |
Willy Tarreau | bf89ff3 | 2018-11-09 14:59:25 +0100 | [diff] [blame] | 959 | appctx_wakeup(si_appctx(si_b)); |
Willy Tarreau | d14844a | 2018-11-08 18:15:29 +0100 | [diff] [blame] | 960 | } |
| 961 | |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 962 | /* |
| 963 | * This function performs a shutdown-read on a stream interface attached to |
| 964 | * a connection in a connected or init state (it does nothing for other |
| 965 | * states). It either shuts the read side or marks itself as closed. The buffer |
| 966 | * flags are updated to reflect the new state. If the stream interface has |
| 967 | * SI_FL_NOHALF, we also forward the close to the write side. If a control |
| 968 | * 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] | 969 | * descriptors are then shutdown or closed accordingly. The function |
| 970 | * automatically disables polling if needed. |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 971 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 972 | static void stream_int_shutr_conn(struct stream_interface *si) |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 973 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 974 | struct conn_stream *cs = __objt_cs(si->end); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 975 | struct channel *ic = si_ic(si); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 976 | |
Willy Tarreau | abb5d42 | 2018-11-14 16:58:52 +0100 | [diff] [blame] | 977 | si_rx_shut_blk(si); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 978 | if (ic->flags & CF_SHUTR) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 979 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 980 | ic->flags |= CF_SHUTR; |
| 981 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 982 | |
Willy Tarreau | 4f283fa | 2019-06-05 14:34:03 +0200 | [diff] [blame] | 983 | if (!si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST)) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 984 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 985 | |
Willy Tarreau | 51d0a7e | 2019-01-31 19:09:59 +0100 | [diff] [blame] | 986 | if (si->flags & SI_FL_KILL_CONN) |
| 987 | cs->flags |= CS_FL_KILL_CONN; |
| 988 | |
Willy Tarreau | 2bb4a96 | 2014-11-28 11:11:05 +0100 | [diff] [blame] | 989 | if (si_oc(si)->flags & CF_SHUTW) { |
Willy Tarreau | a553ae9 | 2017-10-05 18:52:17 +0200 | [diff] [blame] | 990 | cs_close(cs); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 991 | si->state = SI_ST_DIS; |
| 992 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 993 | } |
| 994 | else if (si->flags & SI_FL_NOHALF) { |
| 995 | /* we want to immediately forward this close to the write side */ |
| 996 | return stream_int_shutw_conn(si); |
| 997 | } |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 998 | } |
| 999 | |
| 1000 | /* |
| 1001 | * This function performs a shutdown-write on a stream interface attached to |
| 1002 | * a connection in a connected or init state (it does nothing for other |
| 1003 | * states). It either shuts the write side or marks itself as closed. The |
| 1004 | * buffer flags are updated to reflect the new state. It does also close |
| 1005 | * 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] | 1006 | * data-layer shutdown, it is called. |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 1007 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 1008 | static void stream_int_shutw_conn(struct stream_interface *si) |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 1009 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1010 | struct conn_stream *cs = __objt_cs(si->end); |
| 1011 | struct connection *conn = cs->conn; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1012 | struct channel *ic = si_ic(si); |
| 1013 | struct channel *oc = si_oc(si); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 1014 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1015 | oc->flags &= ~CF_SHUTW_NOW; |
| 1016 | if (oc->flags & CF_SHUTW) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 1017 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1018 | oc->flags |= CF_SHUTW; |
| 1019 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | 43e69dc | 2018-11-06 19:23:03 +0100 | [diff] [blame] | 1020 | si_done_get(si); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 1021 | |
Hongbo Long | e39683c | 2017-03-10 18:41:51 +0100 | [diff] [blame] | 1022 | if (tick_isset(si->hcto)) { |
| 1023 | ic->rto = si->hcto; |
| 1024 | ic->rex = tick_add(now_ms, ic->rto); |
| 1025 | } |
| 1026 | |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 1027 | switch (si->state) { |
Willy Tarreau | 4f283fa | 2019-06-05 14:34:03 +0200 | [diff] [blame] | 1028 | case SI_ST_RDY: |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 1029 | case SI_ST_EST: |
| 1030 | /* we have to shut before closing, otherwise some short messages |
| 1031 | * may never leave the system, especially when there are remaining |
| 1032 | * unread data in the socket input buffer, or when nolinger is set. |
| 1033 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 1034 | * no risk so we close both sides immediately. |
| 1035 | */ |
Willy Tarreau | 51d0a7e | 2019-01-31 19:09:59 +0100 | [diff] [blame] | 1036 | if (si->flags & SI_FL_KILL_CONN) |
| 1037 | cs->flags |= CS_FL_KILL_CONN; |
| 1038 | |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 1039 | if (si->flags & SI_FL_ERR) { |
| 1040 | /* quick close, the socket is alredy shut anyway */ |
| 1041 | } |
| 1042 | else if (si->flags & SI_FL_NOLINGER) { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1043 | /* unclean data-layer shutdown, typically an aborted request |
| 1044 | * or a forwarded shutdown from a client to a server due to |
| 1045 | * option abortonclose. No need for the TLS layer to try to |
| 1046 | * emit a shutdown message. |
| 1047 | */ |
Willy Tarreau | ecdb3fe | 2017-10-05 15:25:48 +0200 | [diff] [blame] | 1048 | cs_shutw(cs, CS_SHW_SILENT); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 1049 | } |
| 1050 | else { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1051 | /* clean data-layer shutdown. This only happens on the |
| 1052 | * frontend side, or on the backend side when forwarding |
| 1053 | * a client close in TCP mode or in HTTP TUNNEL mode |
| 1054 | * while option abortonclose is set. We want the TLS |
| 1055 | * layer to try to signal it to the peer before we close. |
| 1056 | */ |
Willy Tarreau | ecdb3fe | 2017-10-05 15:25:48 +0200 | [diff] [blame] | 1057 | cs_shutw(cs, CS_SHW_NORMAL); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 1058 | |
Willy Tarreau | a553ae9 | 2017-10-05 18:52:17 +0200 | [diff] [blame] | 1059 | if (!(ic->flags & (CF_SHUTR|CF_DONT_READ))) { |
| 1060 | /* OK just a shutw, but we want the caller |
| 1061 | * to disable polling on this FD if exists. |
| 1062 | */ |
| 1063 | conn_cond_update_polling(conn); |
| 1064 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 1065 | } |
| 1066 | } |
| 1067 | |
| 1068 | /* fall through */ |
| 1069 | case SI_ST_CON: |
| 1070 | /* we may have to close a pending connection, and mark the |
| 1071 | * response buffer as shutr |
| 1072 | */ |
Willy Tarreau | 51d0a7e | 2019-01-31 19:09:59 +0100 | [diff] [blame] | 1073 | if (si->flags & SI_FL_KILL_CONN) |
| 1074 | cs->flags |= CS_FL_KILL_CONN; |
Willy Tarreau | a553ae9 | 2017-10-05 18:52:17 +0200 | [diff] [blame] | 1075 | cs_close(cs); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 1076 | /* fall through */ |
| 1077 | case SI_ST_CER: |
| 1078 | case SI_ST_QUE: |
| 1079 | case SI_ST_TAR: |
| 1080 | si->state = SI_ST_DIS; |
Willy Tarreau | 4a59f2f | 2013-10-24 20:10:45 +0200 | [diff] [blame] | 1081 | /* fall through */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 1082 | default: |
Willy Tarreau | abb5d42 | 2018-11-14 16:58:52 +0100 | [diff] [blame] | 1083 | si->flags &= ~SI_FL_NOLINGER; |
| 1084 | si_rx_shut_blk(si); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1085 | ic->flags |= CF_SHUTR; |
| 1086 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 1087 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 1088 | } |
| 1089 | } |
| 1090 | |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 1091 | /* This function is used for inter-stream-interface calls. It is called by the |
| 1092 | * consumer to inform the producer side that it may be interested in checking |
| 1093 | * for free space in the buffer. Note that it intentionally does not update |
| 1094 | * timeouts, so that we can still check them later at wake-up. This function is |
| 1095 | * dedicated to connection-based stream interfaces. |
| 1096 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 1097 | static void stream_int_chk_rcv_conn(struct stream_interface *si) |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 1098 | { |
Christopher Faulet | b3e0de4 | 2018-10-11 13:54:13 +0200 | [diff] [blame] | 1099 | /* (re)start reading */ |
Willy Tarreau | 4f283fa | 2019-06-05 14:34:03 +0200 | [diff] [blame] | 1100 | if (si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST)) |
Willy Tarreau | 3c39a7d | 2019-06-14 14:42:29 +0200 | [diff] [blame] | 1101 | tasklet_wakeup(si->wait_event.tasklet); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 1102 | } |
| 1103 | |
| 1104 | |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1105 | /* This function is used for inter-stream-interface calls. It is called by the |
| 1106 | * producer to inform the consumer side that it may be interested in checking |
| 1107 | * for data in the buffer. Note that it intentionally does not update timeouts, |
| 1108 | * so that we can still check them later at wake-up. |
| 1109 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 1110 | static void stream_int_chk_snd_conn(struct stream_interface *si) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1111 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1112 | struct channel *oc = si_oc(si); |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1113 | struct conn_stream *cs = __objt_cs(si->end); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1114 | |
Willy Tarreau | 4f283fa | 2019-06-05 14:34:03 +0200 | [diff] [blame] | 1115 | if (unlikely(!si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST) || |
Olivier Houchard | b2fc04e | 2019-04-11 13:56:26 +0200 | [diff] [blame] | 1116 | (oc->flags & CF_SHUTW))) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1117 | return; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1118 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1119 | if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1120 | return; |
| 1121 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1122 | if (!oc->pipe && /* spliced data wants to be forwarded ASAP */ |
Willy Tarreau | b016587 | 2012-12-15 10:12:39 +0100 | [diff] [blame] | 1123 | !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1124 | return; |
| 1125 | |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 1126 | if (!(si->wait_event.events & SUB_RETRY_SEND) && !channel_is_empty(si_oc(si))) |
Olivier Houchard | 31f04e4 | 2018-10-22 16:01:09 +0200 | [diff] [blame] | 1127 | si_cs_send(cs); |
Willy Tarreau | 33a09a5 | 2018-10-25 13:49:49 +0200 | [diff] [blame] | 1128 | |
Willy Tarreau | bddf7fc | 2018-12-19 17:17:10 +0100 | [diff] [blame] | 1129 | if (cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING) || cs->conn->flags & CO_FL_ERROR) { |
Willy Tarreau | 3b9c850 | 2017-10-25 14:22:28 +0200 | [diff] [blame] | 1130 | /* Write error on the file descriptor */ |
Olivier Houchard | c31e2cb | 2019-06-24 16:08:08 +0200 | [diff] [blame] | 1131 | if (si->state >= SI_ST_CON) |
| 1132 | si->flags |= SI_FL_ERR; |
Willy Tarreau | 3b9c850 | 2017-10-25 14:22:28 +0200 | [diff] [blame] | 1133 | goto out_wakeup; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1134 | } |
| 1135 | |
| 1136 | /* OK, so now we know that some data might have been sent, and that we may |
| 1137 | * have to poll first. We have to do that too if the buffer is not empty. |
| 1138 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1139 | if (channel_is_empty(oc)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1140 | /* the connection is established but we can't write. Either the |
| 1141 | * buffer is empty, or we just refrain from sending because the |
| 1142 | * ->o limit was reached. Maybe we just wrote the last |
| 1143 | * chunk and need to close. |
| 1144 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1145 | if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) == |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1146 | (CF_AUTO_CLOSE|CF_SHUTW_NOW)) && |
Willy Tarreau | 4f283fa | 2019-06-05 14:34:03 +0200 | [diff] [blame] | 1147 | si_state_in(si->state, SI_SB_RDY|SI_SB_EST)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1148 | si_shutw(si); |
| 1149 | goto out_wakeup; |
| 1150 | } |
| 1151 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1152 | if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1153 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1154 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1155 | } |
| 1156 | else { |
| 1157 | /* Otherwise there are remaining data to be sent in the buffer, |
| 1158 | * which means we have to poll before doing so. |
| 1159 | */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1160 | si->flags &= ~SI_FL_WAIT_DATA; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1161 | if (!tick_isset(oc->wex)) |
| 1162 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1163 | } |
| 1164 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1165 | if (likely(oc->flags & CF_WRITE_ACTIVITY)) { |
| 1166 | struct channel *ic = si_ic(si); |
| 1167 | |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1168 | /* update timeout if we have written something */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1169 | if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
| 1170 | !channel_is_empty(oc)) |
| 1171 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1172 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1173 | if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1174 | /* Note: to prevent the client from expiring read timeouts |
| 1175 | * during writes, we refresh it. We only do this if the |
| 1176 | * interface is not configured for "independent streams", |
| 1177 | * because for some applications it's better not to do this, |
| 1178 | * for instance when continuously exchanging small amounts |
| 1179 | * of data which can full the socket buffers long before a |
| 1180 | * write timeout is detected. |
| 1181 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1182 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1183 | } |
| 1184 | } |
| 1185 | |
| 1186 | /* in case of special condition (error, shutdown, end of write...), we |
| 1187 | * have to notify the task. |
| 1188 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1189 | if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) || |
| 1190 | ((oc->flags & CF_WAKE_WRITE) && |
| 1191 | ((channel_is_empty(oc) && !oc->to_forward) || |
Willy Tarreau | 7ab22adb | 2019-06-05 14:53:22 +0200 | [diff] [blame] | 1192 | !si_state_in(si->state, SI_SB_EST))))) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1193 | out_wakeup: |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 1194 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 1195 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1196 | } |
| 1197 | } |
| 1198 | |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1199 | /* |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1200 | * 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] | 1201 | * 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] | 1202 | * rcv_buf function. |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1203 | */ |
Olivier Houchard | 0e367bb | 2018-09-14 19:41:13 +0200 | [diff] [blame] | 1204 | int si_cs_recv(struct conn_stream *cs) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1205 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1206 | struct connection *conn = cs->conn; |
| 1207 | struct stream_interface *si = cs->data; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1208 | struct channel *ic = si_ic(si); |
Olivier Houchard | f653528 | 2018-08-31 17:29:12 +0200 | [diff] [blame] | 1209 | int ret, max, cur_read = 0; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1210 | int read_poll = MAX_READ_POLL_LOOPS; |
Christopher Faulet | c6618d6 | 2018-10-11 15:56:04 +0200 | [diff] [blame] | 1211 | int flags = 0; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1212 | |
Christopher Faulet | 04400bc | 2019-10-25 10:21:01 +0200 | [diff] [blame] | 1213 | /* If not established yet, do nothing. */ |
| 1214 | if (si->state != SI_ST_EST) |
| 1215 | return 0; |
| 1216 | |
Olivier Houchard | f653528 | 2018-08-31 17:29:12 +0200 | [diff] [blame] | 1217 | /* If another call to si_cs_recv() failed, and we subscribed to |
| 1218 | * recv events already, give up now. |
| 1219 | */ |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 1220 | if (si->wait_event.events & SUB_RETRY_RECV) |
Olivier Houchard | f653528 | 2018-08-31 17:29:12 +0200 | [diff] [blame] | 1221 | return 0; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1222 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1223 | /* maybe we were called immediately after an asynchronous shutr */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1224 | if (ic->flags & CF_SHUTR) |
Olivier Houchard | c2aa711 | 2018-09-11 18:27:21 +0200 | [diff] [blame] | 1225 | return 1; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1226 | |
Willy Tarreau | 54e917c | 2017-08-30 07:35:35 +0200 | [diff] [blame] | 1227 | /* stop here if we reached the end of data */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1228 | if (cs->flags & CS_FL_EOS) |
Willy Tarreau | 54e917c | 2017-08-30 07:35:35 +0200 | [diff] [blame] | 1229 | goto out_shutdown_r; |
| 1230 | |
Christopher Faulet | f061e42 | 2018-12-07 14:51:20 +0100 | [diff] [blame] | 1231 | /* stop immediately on errors. Note that we DON'T want to stop on |
| 1232 | * POLL_ERR, as the poller might report a write error while there |
| 1233 | * are still data available in the recv buffer. This typically |
| 1234 | * happens when we send too large a request to a backend server |
| 1235 | * which rejects it before reading it all. |
| 1236 | */ |
| 1237 | if (!(cs->flags & CS_FL_RCV_MORE)) { |
| 1238 | if (!conn_xprt_ready(conn)) |
| 1239 | return 0; |
| 1240 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) |
| 1241 | return 1; // We want to make sure si_cs_wake() is called, so that process_strema is woken up, on failure |
| 1242 | } |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 1243 | |
Willy Tarreau | 7ab99a3 | 2018-12-18 09:15:43 +0100 | [diff] [blame] | 1244 | /* prepare to detect if the mux needs more room */ |
| 1245 | cs->flags &= ~CS_FL_WANT_ROOM; |
| 1246 | |
Willy Tarreau | 77e478c | 2018-06-19 07:03:14 +0200 | [diff] [blame] | 1247 | if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !co_data(ic) && |
Willy Tarreau | 7e31273 | 2014-02-12 16:35:14 +0100 | [diff] [blame] | 1248 | global.tune.idle_timer && |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1249 | (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1250 | /* The buffer was empty and nothing was transferred for more |
| 1251 | * than one second. This was caused by a pause and not by |
| 1252 | * congestion. Reset any streaming mode to reduce latency. |
| 1253 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1254 | ic->xfer_small = 0; |
| 1255 | ic->xfer_large = 0; |
| 1256 | ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1257 | } |
| 1258 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1259 | /* First, let's see if we may splice data across the channel without |
| 1260 | * using a buffer. |
| 1261 | */ |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1262 | if (conn->xprt->rcv_pipe && conn->mux->rcv_pipe && |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1263 | (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) && |
| 1264 | ic->flags & CF_KERN_SPLICING) { |
Willy Tarreau | d760eec | 2018-07-10 09:50:25 +0200 | [diff] [blame] | 1265 | if (c_data(ic)) { |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1266 | /* We're embarrassed, there are already data pending in |
| 1267 | * the buffer and we don't want to have them at two |
| 1268 | * locations at a time. Let's indicate we need some |
| 1269 | * place and ask the consumer to hurry. |
| 1270 | */ |
Christopher Faulet | c6618d6 | 2018-10-11 15:56:04 +0200 | [diff] [blame] | 1271 | flags |= CO_RFL_BUF_FLUSH; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1272 | goto abort_splice; |
| 1273 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1274 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1275 | if (unlikely(ic->pipe == NULL)) { |
| 1276 | if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) { |
| 1277 | ic->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1278 | goto abort_splice; |
| 1279 | } |
| 1280 | } |
| 1281 | |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1282 | ret = conn->mux->rcv_pipe(cs, ic->pipe, ic->to_forward); |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1283 | if (ret < 0) { |
| 1284 | /* splice not supported on this end, let's disable it */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1285 | ic->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1286 | goto abort_splice; |
| 1287 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1288 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1289 | if (ret > 0) { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1290 | if (ic->to_forward != CHN_INFINITE_FORWARD) |
| 1291 | ic->to_forward -= ret; |
| 1292 | ic->total += ret; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1293 | cur_read += ret; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1294 | ic->flags |= CF_READ_PARTIAL; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1295 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1296 | |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1297 | if (cs->flags & CS_FL_EOS) |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1298 | goto out_shutdown_r; |
| 1299 | |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 1300 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) |
Olivier Houchard | c2aa711 | 2018-09-11 18:27:21 +0200 | [diff] [blame] | 1301 | return 1; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1302 | |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1303 | if (conn->flags & CO_FL_WAIT_ROOM) { |
| 1304 | /* the pipe is full or we have read enough data that it |
| 1305 | * could soon be full. Let's stop before needing to poll. |
| 1306 | */ |
Willy Tarreau | db39843 | 2018-11-15 11:08:52 +0100 | [diff] [blame] | 1307 | si_rx_room_blk(si); |
Willy Tarreau | ffb1205 | 2018-11-15 16:06:02 +0100 | [diff] [blame] | 1308 | goto done_recv; |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1309 | } |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1310 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1311 | /* splice not possible (anymore), let's go on on standard copy */ |
| 1312 | } |
Willy Tarreau | 81464b4 | 2018-11-15 15:52:53 +0100 | [diff] [blame] | 1313 | else { |
| 1314 | /* be sure not to block regular receive path below */ |
| 1315 | conn->flags &= ~CO_FL_WAIT_ROOM; |
| 1316 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1317 | |
| 1318 | abort_splice: |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1319 | if (ic->pipe && unlikely(!ic->pipe->data)) { |
| 1320 | put_pipe(ic->pipe); |
| 1321 | ic->pipe = NULL; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1322 | } |
| 1323 | |
Christopher Faulet | a73e59b | 2016-12-09 17:30:18 +0100 | [diff] [blame] | 1324 | /* now we'll need a input buffer for the stream */ |
Willy Tarreau | 581abd3 | 2018-10-25 10:21:41 +0200 | [diff] [blame] | 1325 | if (!si_alloc_ibuf(si, &(si_strm(si)->buffer_wait))) |
Willy Tarreau | 10fc09e | 2014-11-25 19:46:36 +0100 | [diff] [blame] | 1326 | goto end_recv; |
Willy Tarreau | 10fc09e | 2014-11-25 19:46:36 +0100 | [diff] [blame] | 1327 | |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1328 | /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling |
| 1329 | * was enabled, which implies that the recv buffer was not full. So we have a guarantee |
| 1330 | * that if such an event is not handled above in splice, it will be handled here by |
| 1331 | * recv(). |
| 1332 | */ |
Olivier Houchard | c490efd | 2018-12-04 15:46:16 +0100 | [diff] [blame] | 1333 | while ((cs->flags & CS_FL_RCV_MORE) || |
| 1334 | (!(conn->flags & (CO_FL_ERROR | CO_FL_WAIT_ROOM | CO_FL_HANDSHAKE)) && |
| 1335 | (!(cs->flags & (CS_FL_ERROR|CS_FL_EOS))) && !(ic->flags & CF_SHUTR))) { |
Christopher Faulet | 4eb7d74 | 2018-10-11 15:29:21 +0200 | [diff] [blame] | 1336 | /* <max> may be null. This is the mux responsibility to set |
| 1337 | * CS_FL_RCV_MORE on the CS if more space is needed. |
| 1338 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1339 | max = channel_recv_max(ic); |
Christopher Faulet | 9cdd503 | 2019-05-14 22:46:41 +0200 | [diff] [blame] | 1340 | ret = cs->conn->mux->rcv_buf(cs, &ic->buf, max, flags | (co_data(ic) ? CO_RFL_BUF_WET : 0)); |
Willy Tarreau | 674e0ad | 2018-12-05 13:45:41 +0100 | [diff] [blame] | 1341 | |
Olivier Houchard | d247be0 | 2018-12-06 16:22:29 +0100 | [diff] [blame] | 1342 | if (cs->flags & CS_FL_WANT_ROOM) |
Willy Tarreau | db39843 | 2018-11-15 11:08:52 +0100 | [diff] [blame] | 1343 | si_rx_room_blk(si); |
Willy Tarreau | 6577b48 | 2017-12-10 21:19:33 +0100 | [diff] [blame] | 1344 | |
Christopher Faulet | effc375 | 2018-10-31 08:53:54 +0100 | [diff] [blame] | 1345 | if (cs->flags & CS_FL_READ_PARTIAL) { |
| 1346 | if (tick_isset(ic->rex)) |
| 1347 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
| 1348 | cs->flags &= ~CS_FL_READ_PARTIAL; |
| 1349 | } |
| 1350 | |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 1351 | if (ret <= 0) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1352 | break; |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 1353 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1354 | |
Olivier Houchard | a254a37 | 2019-04-05 15:30:12 +0200 | [diff] [blame] | 1355 | if (si->flags & SI_FL_L7_RETRY) { |
| 1356 | struct htx *htx; |
| 1357 | struct htx_sl *sl; |
| 1358 | |
| 1359 | htx = htxbuf(&ic->buf); |
| 1360 | if (htx) { |
Christopher Faulet | 297fbb4 | 2019-05-13 14:41:27 +0200 | [diff] [blame] | 1361 | sl = http_get_stline(htx); |
Olivier Houchard | a254a37 | 2019-04-05 15:30:12 +0200 | [diff] [blame] | 1362 | if (sl && l7_status_match(si_strm(si)->be, |
| 1363 | sl->info.res.status)) { |
| 1364 | /* If we got a status for which we would |
| 1365 | * like to retry the request, empty |
| 1366 | * the buffer and pretend there's an |
| 1367 | * error on the channel. |
| 1368 | */ |
| 1369 | ic->flags |= CF_READ_ERROR; |
| 1370 | htx_reset(htx); |
| 1371 | return 1; |
| 1372 | } |
| 1373 | } |
| 1374 | si->flags &= ~SI_FL_L7_RETRY; |
| 1375 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1376 | cur_read += ret; |
| 1377 | |
| 1378 | /* if we're allowed to directly forward data, we must update ->o */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1379 | if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1380 | unsigned long fwd = ret; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1381 | if (ic->to_forward != CHN_INFINITE_FORWARD) { |
| 1382 | if (fwd > ic->to_forward) |
| 1383 | fwd = ic->to_forward; |
| 1384 | ic->to_forward -= fwd; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1385 | } |
Willy Tarreau | bcbd393 | 2018-06-06 07:13:22 +0200 | [diff] [blame] | 1386 | c_adv(ic, fwd); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1387 | } |
| 1388 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1389 | ic->flags |= CF_READ_PARTIAL; |
| 1390 | ic->total += ret; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1391 | |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 1392 | if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0) { |
| 1393 | /* we're stopped by the channel's policy */ |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 1394 | si_rx_chan_blk(si); |
Willy Tarreau | 62dd698 | 2017-11-18 11:26:20 +0100 | [diff] [blame] | 1395 | break; |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 1396 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1397 | |
| 1398 | /* if too many bytes were missing from last read, it means that |
| 1399 | * it's pointless trying to read again because the system does |
| 1400 | * not have them in buffers. |
| 1401 | */ |
| 1402 | if (ret < max) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1403 | /* if a streamer has read few data, it may be because we |
| 1404 | * have exhausted system buffers. It's not worth trying |
| 1405 | * again. |
| 1406 | */ |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 1407 | if (ic->flags & CF_STREAMER) { |
| 1408 | /* we're stopped by the channel's policy */ |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 1409 | si_rx_chan_blk(si); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1410 | break; |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 1411 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1412 | |
| 1413 | /* if we read a large block smaller than what we requested, |
| 1414 | * it's almost certain we'll never get anything more. |
| 1415 | */ |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 1416 | if (ret >= global.tune.recv_enough) { |
| 1417 | /* we're stopped by the channel's policy */ |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 1418 | si_rx_chan_blk(si); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1419 | break; |
Willy Tarreau | f26c26c | 2018-11-12 16:11:08 +0100 | [diff] [blame] | 1420 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1421 | } |
Christopher Faulet | b3e0de4 | 2018-10-11 13:54:13 +0200 | [diff] [blame] | 1422 | |
| 1423 | /* if we are waiting for more space, don't try to read more data |
| 1424 | * right now. |
| 1425 | */ |
Willy Tarreau | b26a6f9 | 2018-11-14 17:10:36 +0100 | [diff] [blame] | 1426 | if (si_rx_blocked(si)) |
Christopher Faulet | b3e0de4 | 2018-10-11 13:54:13 +0200 | [diff] [blame] | 1427 | break; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1428 | } /* while !flags */ |
| 1429 | |
Willy Tarreau | ffb1205 | 2018-11-15 16:06:02 +0100 | [diff] [blame] | 1430 | done_recv: |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1431 | if (cur_read) { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1432 | if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1433 | (cur_read <= ic->buf.size / 2)) { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1434 | ic->xfer_large = 0; |
| 1435 | ic->xfer_small++; |
| 1436 | if (ic->xfer_small >= 3) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1437 | /* we have read less than half of the buffer in |
| 1438 | * one pass, and this happened at least 3 times. |
| 1439 | * This is definitely not a streamer. |
| 1440 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1441 | ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1442 | } |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1443 | else if (ic->xfer_small >= 2) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1444 | /* if the buffer has been at least half full twice, |
| 1445 | * we receive faster than we send, so at least it |
| 1446 | * is not a "fast streamer". |
| 1447 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1448 | ic->flags &= ~CF_STREAMER_FAST; |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1449 | } |
| 1450 | } |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1451 | else if (!(ic->flags & CF_STREAMER_FAST) && |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1452 | (cur_read >= ic->buf.size - global.tune.maxrewrite)) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1453 | /* we read a full buffer at once */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1454 | ic->xfer_small = 0; |
| 1455 | ic->xfer_large++; |
| 1456 | if (ic->xfer_large >= 3) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1457 | /* we call this buffer a fast streamer if it manages |
| 1458 | * to be filled in one call 3 consecutive times. |
| 1459 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1460 | ic->flags |= (CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1461 | } |
| 1462 | } |
| 1463 | else { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1464 | ic->xfer_small = 0; |
| 1465 | ic->xfer_large = 0; |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1466 | } |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1467 | ic->last_read = now_ms; |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1468 | } |
| 1469 | |
Willy Tarreau | 10fc09e | 2014-11-25 19:46:36 +0100 | [diff] [blame] | 1470 | end_recv: |
Willy Tarreau | 4ff3b89 | 2017-10-16 15:17:17 +0200 | [diff] [blame] | 1471 | if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR) |
Olivier Houchard | c2aa711 | 2018-09-11 18:27:21 +0200 | [diff] [blame] | 1472 | return 1; |
Willy Tarreau | 10fc09e | 2014-11-25 19:46:36 +0100 | [diff] [blame] | 1473 | |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1474 | if (cs->flags & CS_FL_EOS) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1475 | /* connection closed */ |
| 1476 | goto out_shutdown_r; |
| 1477 | |
Willy Tarreau | 32742fd | 2018-11-14 14:07:59 +0100 | [diff] [blame] | 1478 | /* Subscribe to receive events if we're blocking on I/O */ |
Willy Tarreau | dd5621a | 2018-11-15 16:55:14 +0100 | [diff] [blame] | 1479 | if (!si_rx_blocked(si)) { |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 1480 | conn->mux->subscribe(cs, SUB_RETRY_RECV, &si->wait_event); |
Willy Tarreau | dd5621a | 2018-11-15 16:55:14 +0100 | [diff] [blame] | 1481 | si_rx_endp_done(si); |
| 1482 | } else { |
| 1483 | si_rx_endp_more(si); |
| 1484 | } |
Olivier Houchard | f653528 | 2018-08-31 17:29:12 +0200 | [diff] [blame] | 1485 | |
Olivier Houchard | 19a2e2d | 2019-06-07 18:10:52 +0200 | [diff] [blame] | 1486 | return (cur_read != 0) || si_rx_blocked(si) || (cs->flags & CS_FL_EOI); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1487 | |
| 1488 | out_shutdown_r: |
Olivier Houchard | fd0c2dc | 2018-12-13 15:38:16 +0100 | [diff] [blame] | 1489 | if (conn->flags & CO_FL_CONNECTED) { |
| 1490 | /* we received a shutdown */ |
| 1491 | ic->flags |= CF_READ_NULL; |
| 1492 | if (ic->flags & CF_AUTO_CLOSE) |
| 1493 | channel_shutw_now(ic); |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 1494 | stream_int_read0(si); |
Olivier Houchard | fd0c2dc | 2018-12-13 15:38:16 +0100 | [diff] [blame] | 1495 | } |
Olivier Houchard | c2aa711 | 2018-09-11 18:27:21 +0200 | [diff] [blame] | 1496 | return 1; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1497 | } |
| 1498 | |
| 1499 | /* |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1500 | * This function propagates a null read received on a socket-based connection. |
| 1501 | * 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] | 1502 | * the close is also forwarded to the write side as an abort. |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1503 | */ |
Willy Tarreau | 14bfe9a | 2018-12-19 15:19:27 +0100 | [diff] [blame] | 1504 | static void stream_int_read0(struct stream_interface *si) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1505 | { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 1506 | struct conn_stream *cs = __objt_cs(si->end); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1507 | struct channel *ic = si_ic(si); |
| 1508 | struct channel *oc = si_oc(si); |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1509 | |
Willy Tarreau | abb5d42 | 2018-11-14 16:58:52 +0100 | [diff] [blame] | 1510 | si_rx_shut_blk(si); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1511 | if (ic->flags & CF_SHUTR) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1512 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1513 | ic->flags |= CF_SHUTR; |
| 1514 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1515 | |
Willy Tarreau | 4f283fa | 2019-06-05 14:34:03 +0200 | [diff] [blame] | 1516 | if (!si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST)) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1517 | return; |
| 1518 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1519 | if (oc->flags & CF_SHUTW) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1520 | goto do_close; |
| 1521 | |
| 1522 | if (si->flags & SI_FL_NOHALF) { |
| 1523 | /* we want to immediately forward this close to the write side */ |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 1524 | /* force flag on ssl to keep stream in cache */ |
Willy Tarreau | ecdb3fe | 2017-10-05 15:25:48 +0200 | [diff] [blame] | 1525 | cs_shutw(cs, CS_SHW_SILENT); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1526 | goto do_close; |
| 1527 | } |
| 1528 | |
| 1529 | /* otherwise that's just a normal read shutdown */ |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1530 | return; |
| 1531 | |
| 1532 | do_close: |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1533 | /* 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] | 1534 | cs_close(cs); |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1535 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1536 | oc->flags &= ~CF_SHUTW_NOW; |
| 1537 | oc->flags |= CF_SHUTW; |
| 1538 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1539 | |
Willy Tarreau | 43e69dc | 2018-11-06 19:23:03 +0100 | [diff] [blame] | 1540 | si_done_get(si); |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1541 | |
Christopher Faulet | 04400bc | 2019-10-25 10:21:01 +0200 | [diff] [blame] | 1542 | si->state = SI_ST_DIS; |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1543 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1544 | return; |
| 1545 | } |
| 1546 | |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 1547 | /* Callback to be used by applet handlers upon completion. It updates the stream |
| 1548 | * (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] | 1549 | * 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] | 1550 | * states. |
| 1551 | */ |
Willy Tarreau | aa977ba | 2015-09-25 11:45:06 +0200 | [diff] [blame] | 1552 | void si_applet_wake_cb(struct stream_interface *si) |
Willy Tarreau | e5f8649 | 2015-04-19 15:16:35 +0200 | [diff] [blame] | 1553 | { |
Willy Tarreau | eca572f | 2015-09-25 19:11:55 +0200 | [diff] [blame] | 1554 | struct channel *ic = si_ic(si); |
| 1555 | |
| 1556 | /* If the applet wants to write and the channel is closed, it's a |
| 1557 | * broken pipe and it must be reported. |
| 1558 | */ |
Willy Tarreau | 05b9b64 | 2018-11-14 13:43:35 +0100 | [diff] [blame] | 1559 | if (!(si->flags & SI_FL_RX_WAIT_EP) && (ic->flags & CF_SHUTR)) |
Willy Tarreau | eca572f | 2015-09-25 19:11:55 +0200 | [diff] [blame] | 1560 | si->flags |= SI_FL_ERR; |
| 1561 | |
Willy Tarreau | 186dcdd | 2018-11-16 16:18:34 +0100 | [diff] [blame] | 1562 | /* automatically mark the applet having data available if it reported |
| 1563 | * begin blocked by the channel. |
| 1564 | */ |
| 1565 | if (si_rx_blocked(si)) |
| 1566 | si_rx_endp_more(si); |
| 1567 | |
Willy Tarreau | 651e182 | 2015-09-23 20:06:13 +0200 | [diff] [blame] | 1568 | /* update the stream-int, channels, and possibly wake the stream up */ |
| 1569 | stream_int_notify(si); |
Willy Tarreau | a64c703 | 2019-08-01 14:17:02 +0200 | [diff] [blame] | 1570 | stream_release_buffers(si_strm(si)); |
Willy Tarreau | e5f8649 | 2015-04-19 15:16:35 +0200 | [diff] [blame] | 1571 | |
Willy Tarreau | 32742fd | 2018-11-14 14:07:59 +0100 | [diff] [blame] | 1572 | /* stream_int_notify may have passed through chk_snd and released some |
| 1573 | * RXBLK flags. Process_stream will consider those flags to wake up the |
| 1574 | * appctx but in the case the task is not in runqueue we may have to |
| 1575 | * wakeup the appctx immediately. |
Emeric Brun | 2802b07 | 2017-06-30 14:11:56 +0200 | [diff] [blame] | 1576 | */ |
Olivier Houchard | 51205a1 | 2019-04-17 19:29:35 +0200 | [diff] [blame] | 1577 | if ((si_rx_endp_ready(si) && !si_rx_blocked(si)) || |
| 1578 | (si_tx_endp_ready(si) && !si_tx_blocked(si))) |
Willy Tarreau | 563cc37 | 2015-04-19 18:13:56 +0200 | [diff] [blame] | 1579 | appctx_wakeup(si_appctx(si)); |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1580 | } |
| 1581 | |
| 1582 | /* |
| 1583 | * This function performs a shutdown-read on a stream interface attached to an |
| 1584 | * applet in a connected or init state (it does nothing for other states). It |
| 1585 | * either shuts the read side or marks itself as closed. The buffer flags are |
| 1586 | * updated to reflect the new state. If the stream interface has SI_FL_NOHALF, |
| 1587 | * we also forward the close to the write side. The owner task is woken up if |
| 1588 | * it exists. |
| 1589 | */ |
| 1590 | static void stream_int_shutr_applet(struct stream_interface *si) |
| 1591 | { |
| 1592 | struct channel *ic = si_ic(si); |
| 1593 | |
Willy Tarreau | abb5d42 | 2018-11-14 16:58:52 +0100 | [diff] [blame] | 1594 | si_rx_shut_blk(si); |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1595 | if (ic->flags & CF_SHUTR) |
| 1596 | return; |
| 1597 | ic->flags |= CF_SHUTR; |
| 1598 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1599 | |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1600 | /* Note: on shutr, we don't call the applet */ |
| 1601 | |
Willy Tarreau | 4f283fa | 2019-06-05 14:34:03 +0200 | [diff] [blame] | 1602 | if (!si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST)) |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1603 | return; |
| 1604 | |
| 1605 | if (si_oc(si)->flags & CF_SHUTW) { |
Willy Tarreau | 958f074 | 2015-09-25 20:24:26 +0200 | [diff] [blame] | 1606 | si_applet_release(si); |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1607 | si->state = SI_ST_DIS; |
| 1608 | si->exp = TICK_ETERNITY; |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1609 | } |
| 1610 | else if (si->flags & SI_FL_NOHALF) { |
| 1611 | /* we want to immediately forward this close to the write side */ |
| 1612 | return stream_int_shutw_applet(si); |
| 1613 | } |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1614 | } |
| 1615 | |
| 1616 | /* |
| 1617 | * This function performs a shutdown-write on a stream interface attached to an |
| 1618 | * applet in a connected or init state (it does nothing for other states). It |
| 1619 | * either shuts the write side or marks itself as closed. The buffer flags are |
| 1620 | * updated to reflect the new state. It does also close everything if the SI |
| 1621 | * was marked as being in error state. The owner task is woken up if it exists. |
| 1622 | */ |
| 1623 | static void stream_int_shutw_applet(struct stream_interface *si) |
| 1624 | { |
| 1625 | struct channel *ic = si_ic(si); |
| 1626 | struct channel *oc = si_oc(si); |
| 1627 | |
| 1628 | oc->flags &= ~CF_SHUTW_NOW; |
| 1629 | if (oc->flags & CF_SHUTW) |
| 1630 | return; |
| 1631 | oc->flags |= CF_SHUTW; |
| 1632 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | 43e69dc | 2018-11-06 19:23:03 +0100 | [diff] [blame] | 1633 | si_done_get(si); |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1634 | |
Hongbo Long | e39683c | 2017-03-10 18:41:51 +0100 | [diff] [blame] | 1635 | if (tick_isset(si->hcto)) { |
| 1636 | ic->rto = si->hcto; |
| 1637 | ic->rex = tick_add(now_ms, ic->rto); |
| 1638 | } |
| 1639 | |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1640 | /* on shutw we always wake the applet up */ |
| 1641 | appctx_wakeup(si_appctx(si)); |
| 1642 | |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1643 | switch (si->state) { |
Willy Tarreau | 4f283fa | 2019-06-05 14:34:03 +0200 | [diff] [blame] | 1644 | case SI_ST_RDY: |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1645 | case SI_ST_EST: |
| 1646 | /* we have to shut before closing, otherwise some short messages |
| 1647 | * may never leave the system, especially when there are remaining |
| 1648 | * unread data in the socket input buffer, or when nolinger is set. |
| 1649 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 1650 | * no risk so we close both sides immediately. |
| 1651 | */ |
| 1652 | if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) && |
| 1653 | !(ic->flags & (CF_SHUTR|CF_DONT_READ))) |
| 1654 | return; |
| 1655 | |
| 1656 | /* fall through */ |
| 1657 | case SI_ST_CON: |
| 1658 | case SI_ST_CER: |
| 1659 | case SI_ST_QUE: |
| 1660 | case SI_ST_TAR: |
| 1661 | /* Note that none of these states may happen with applets */ |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1662 | si_applet_release(si); |
Willy Tarreau | 958f074 | 2015-09-25 20:24:26 +0200 | [diff] [blame] | 1663 | si->state = SI_ST_DIS; |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1664 | default: |
Willy Tarreau | abb5d42 | 2018-11-14 16:58:52 +0100 | [diff] [blame] | 1665 | si->flags &= ~SI_FL_NOLINGER; |
| 1666 | si_rx_shut_blk(si); |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1667 | ic->flags |= CF_SHUTR; |
| 1668 | ic->rex = TICK_ETERNITY; |
| 1669 | si->exp = TICK_ETERNITY; |
| 1670 | } |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1671 | } |
| 1672 | |
| 1673 | /* chk_rcv function for applets */ |
| 1674 | static void stream_int_chk_rcv_applet(struct stream_interface *si) |
| 1675 | { |
| 1676 | struct channel *ic = si_ic(si); |
| 1677 | |
| 1678 | DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n", |
| 1679 | __FUNCTION__, |
| 1680 | si, si->state, ic->flags, si_oc(si)->flags); |
| 1681 | |
Christopher Faulet | b3e0de4 | 2018-10-11 13:54:13 +0200 | [diff] [blame] | 1682 | if (!ic->pipe) { |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1683 | /* (re)start reading */ |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1684 | appctx_wakeup(si_appctx(si)); |
Thierry FOURNIER | 5bc2cbf | 2015-09-04 18:40:36 +0200 | [diff] [blame] | 1685 | } |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1686 | } |
| 1687 | |
| 1688 | /* chk_snd function for applets */ |
| 1689 | static void stream_int_chk_snd_applet(struct stream_interface *si) |
| 1690 | { |
| 1691 | struct channel *oc = si_oc(si); |
| 1692 | |
| 1693 | DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n", |
| 1694 | __FUNCTION__, |
| 1695 | si, si->state, si_ic(si)->flags, oc->flags); |
| 1696 | |
| 1697 | if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW))) |
| 1698 | return; |
| 1699 | |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1700 | /* we only wake the applet up if it was waiting for some data */ |
| 1701 | |
| 1702 | if (!(si->flags & SI_FL_WAIT_DATA)) |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1703 | return; |
| 1704 | |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1705 | if (!tick_isset(oc->wex)) |
| 1706 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
| 1707 | |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1708 | if (!channel_is_empty(oc)) { |
| 1709 | /* (re)start sending */ |
| 1710 | appctx_wakeup(si_appctx(si)); |
| 1711 | } |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1712 | } |
| 1713 | |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 1714 | /* |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 1715 | * Local variables: |
| 1716 | * c-indent-level: 8 |
| 1717 | * c-basic-offset: 8 |
| 1718 | * End: |
| 1719 | */ |