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> |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 33 | #include <proto/pipe.h> |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 34 | #include <proto/stream.h> |
Willy Tarreau | 269358d | 2009-09-20 20:14:49 +0200 | [diff] [blame] | 35 | #include <proto/stream_interface.h> |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 36 | #include <proto/task.h> |
| 37 | |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 38 | #include <types/pipe.h> |
| 39 | |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 40 | /* socket functions used when running a stream interface as a task */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 41 | static void stream_int_update_embedded(struct stream_interface *si); |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 42 | static void stream_int_shutr(struct stream_interface *si); |
| 43 | static void stream_int_shutw(struct stream_interface *si); |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 44 | static void stream_int_chk_rcv(struct stream_interface *si); |
| 45 | static void stream_int_chk_snd(struct stream_interface *si); |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 46 | static void stream_int_update_conn(struct stream_interface *si); |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 47 | static void stream_int_shutr_conn(struct stream_interface *si); |
| 48 | static void stream_int_shutw_conn(struct stream_interface *si); |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 49 | static void stream_int_chk_rcv_conn(struct stream_interface *si); |
| 50 | static void stream_int_chk_snd_conn(struct stream_interface *si); |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 51 | static void stream_int_update_applet(struct stream_interface *si); |
| 52 | static void stream_int_shutr_applet(struct stream_interface *si); |
| 53 | static void stream_int_shutw_applet(struct stream_interface *si); |
| 54 | static void stream_int_chk_rcv_applet(struct stream_interface *si); |
| 55 | static void stream_int_chk_snd_applet(struct stream_interface *si); |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 56 | static void si_conn_recv_cb(struct connection *conn); |
| 57 | static void si_conn_send_cb(struct connection *conn); |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 58 | static int si_conn_wake_cb(struct connection *conn); |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 59 | static int si_idle_conn_wake_cb(struct connection *conn); |
| 60 | static void si_idle_conn_null_cb(struct connection *conn); |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 61 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 62 | /* stream-interface operations for embedded tasks */ |
| 63 | struct si_ops si_embedded_ops = { |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 64 | .update = stream_int_update_embedded, |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 65 | .chk_rcv = stream_int_chk_rcv, |
| 66 | .chk_snd = stream_int_chk_snd, |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 67 | .shutr = stream_int_shutr, |
| 68 | .shutw = stream_int_shutw, |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 69 | }; |
| 70 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 71 | /* stream-interface operations for connections */ |
| 72 | struct si_ops si_conn_ops = { |
| 73 | .update = stream_int_update_conn, |
| 74 | .chk_rcv = stream_int_chk_rcv_conn, |
| 75 | .chk_snd = stream_int_chk_snd_conn, |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 76 | .shutr = stream_int_shutr_conn, |
| 77 | .shutw = stream_int_shutw_conn, |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 78 | }; |
| 79 | |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 80 | /* stream-interface operations for connections */ |
| 81 | struct si_ops si_applet_ops = { |
| 82 | .update = stream_int_update_applet, |
| 83 | .chk_rcv = stream_int_chk_rcv_applet, |
| 84 | .chk_snd = stream_int_chk_snd_applet, |
| 85 | .shutr = stream_int_shutr_applet, |
| 86 | .shutw = stream_int_shutw_applet, |
| 87 | }; |
| 88 | |
Willy Tarreau | 74beec3 | 2012-10-03 00:41:04 +0200 | [diff] [blame] | 89 | struct data_cb si_conn_cb = { |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 90 | .recv = si_conn_recv_cb, |
| 91 | .send = si_conn_send_cb, |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 92 | .wake = si_conn_wake_cb, |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 93 | }; |
| 94 | |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 95 | struct data_cb si_idle_conn_cb = { |
| 96 | .recv = si_idle_conn_null_cb, |
| 97 | .send = si_idle_conn_null_cb, |
| 98 | .wake = si_idle_conn_wake_cb, |
| 99 | }; |
| 100 | |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 101 | /* |
| 102 | * This function only has to be called once after a wakeup event in case of |
| 103 | * suspected timeout. It controls the stream interface timeouts and sets |
| 104 | * si->flags accordingly. It does NOT close anything, as this timeout may |
| 105 | * be used for any purpose. It returns 1 if the timeout fired, otherwise |
| 106 | * zero. |
| 107 | */ |
| 108 | int stream_int_check_timeouts(struct stream_interface *si) |
| 109 | { |
| 110 | if (tick_is_expired(si->exp, now_ms)) { |
| 111 | si->flags |= SI_FL_EXP; |
| 112 | return 1; |
| 113 | } |
| 114 | return 0; |
| 115 | } |
| 116 | |
Willy Tarreau | fe3718a | 2008-11-30 18:14:12 +0100 | [diff] [blame] | 117 | /* to be called only when in SI_ST_DIS with SI_FL_ERR */ |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 118 | void stream_int_report_error(struct stream_interface *si) |
| 119 | { |
| 120 | if (!si->err_type) |
| 121 | si->err_type = SI_ET_DATA_ERR; |
| 122 | |
Willy Tarreau | 2bb4a96 | 2014-11-28 11:11:05 +0100 | [diff] [blame] | 123 | si_oc(si)->flags |= CF_WRITE_ERROR; |
| 124 | si_ic(si)->flags |= CF_READ_ERROR; |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 125 | } |
| 126 | |
| 127 | /* |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 128 | * Returns a message to the client ; the connection is shut down for read, |
| 129 | * and the request is cleared so that no server connection can be initiated. |
| 130 | * The buffer is marked for read shutdown on the other side to protect the |
| 131 | * message, and the buffer write is enabled. The message is contained in a |
Willy Tarreau | 148d099 | 2010-01-10 10:21:21 +0100 | [diff] [blame] | 132 | * "chunk". If it is null, then an empty message is used. The reply buffer does |
| 133 | * not need to be empty before this, and its contents will not be overwritten. |
| 134 | * The primary goal of this function is to return error messages to a client. |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 135 | */ |
| 136 | void stream_int_retnclose(struct stream_interface *si, const struct chunk *msg) |
| 137 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 138 | struct channel *ic = si_ic(si); |
| 139 | struct channel *oc = si_oc(si); |
| 140 | |
| 141 | channel_auto_read(ic); |
| 142 | channel_abort(ic); |
| 143 | channel_auto_close(ic); |
| 144 | channel_erase(ic); |
| 145 | channel_truncate(oc); |
Willy Tarreau | 798e128 | 2010-12-12 13:06:00 +0100 | [diff] [blame] | 146 | |
Willy Tarreau | 148d099 | 2010-01-10 10:21:21 +0100 | [diff] [blame] | 147 | if (likely(msg && msg->len)) |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 148 | bo_inject(oc, msg->str, msg->len); |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 149 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 150 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
| 151 | channel_auto_read(oc); |
| 152 | channel_auto_close(oc); |
| 153 | channel_shutr_now(oc); |
Willy Tarreau | 5d881d0 | 2009-12-27 22:51:06 +0100 | [diff] [blame] | 154 | } |
| 155 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 156 | /* default update function for embedded tasks, to be used at the end of the i/o handler */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 157 | static void stream_int_update_embedded(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 158 | { |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 159 | int old_flags = si->flags; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 160 | struct channel *ic = si_ic(si); |
| 161 | struct channel *oc = si_oc(si); |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 162 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 163 | 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] | 164 | __FUNCTION__, |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 165 | si, si->state, ic->flags, oc->flags); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 166 | |
| 167 | if (si->state != SI_ST_EST) |
| 168 | return; |
| 169 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 170 | if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW && |
| 171 | channel_is_empty(oc)) |
Willy Tarreau | 73b013b | 2012-05-21 16:31:45 +0200 | [diff] [blame] | 172 | si_shutw(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 173 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 174 | if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0 && channel_may_recv(oc)) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 175 | si->flags |= SI_FL_WAIT_DATA; |
| 176 | |
Willy Tarreau | 96fd4b5 | 2009-10-04 17:18:35 +0200 | [diff] [blame] | 177 | /* we're almost sure that we need some space if the buffer is not |
| 178 | * empty, even if it's not full, because the applets can't fill it. |
| 179 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 180 | if ((ic->flags & (CF_SHUTR|CF_DONT_READ)) == 0 && !channel_is_empty(ic)) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 181 | si->flags |= SI_FL_WAIT_ROOM; |
| 182 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 183 | if (oc->flags & CF_WRITE_ACTIVITY) { |
| 184 | if (tick_isset(oc->wex)) |
| 185 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 186 | } |
| 187 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 188 | if (ic->flags & CF_READ_ACTIVITY || |
| 189 | (oc->flags & CF_WRITE_ACTIVITY && !(si->flags & SI_FL_INDEP_STR))) { |
| 190 | if (tick_isset(ic->rex)) |
| 191 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
Willy Tarreau | f27b5ea | 2009-10-03 22:01:18 +0200 | [diff] [blame] | 192 | } |
| 193 | |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 194 | /* save flags to detect changes */ |
| 195 | old_flags = si->flags; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 196 | if (likely((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL|CF_DONT_READ)) == CF_WRITE_PARTIAL && |
| 197 | channel_may_recv(oc) && |
Willy Tarreau | 50fe03b | 2014-11-28 13:59:31 +0100 | [diff] [blame] | 198 | (si_opposite(si)->flags & SI_FL_WAIT_ROOM))) |
| 199 | si_chk_rcv(si_opposite(si)); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 200 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 201 | if (((ic->flags & CF_READ_PARTIAL) && !channel_is_empty(ic)) && |
| 202 | (ic->pipe /* always try to send spliced data */ || |
| 203 | (ic->buf->i == 0 && (si_opposite(si)->flags & SI_FL_WAIT_DATA)))) { |
Willy Tarreau | 50fe03b | 2014-11-28 13:59:31 +0100 | [diff] [blame] | 204 | si_chk_snd(si_opposite(si)); |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 205 | /* check if the consumer has freed some space */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 206 | if (channel_may_recv(ic) && !ic->pipe) |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 207 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 208 | } |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 209 | |
| 210 | /* Note that we're trying to wake up in two conditions here : |
| 211 | * - special event, which needs the holder task attention |
| 212 | * - status indicating that the applet can go on working. This |
| 213 | * is rather hard because we might be blocking on output and |
| 214 | * don't want to wake up on input and vice-versa. The idea is |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 215 | * to only rely on the changes the chk_* might have performed. |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 216 | */ |
| 217 | if (/* check stream interface changes */ |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 218 | ((old_flags & ~si->flags) & (SI_FL_WAIT_ROOM|SI_FL_WAIT_DATA)) || |
| 219 | |
| 220 | /* changes on the production side */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 221 | (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) || |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 222 | si->state != SI_ST_EST || |
| 223 | (si->flags & SI_FL_ERR) || |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 224 | ((ic->flags & CF_READ_PARTIAL) && |
| 225 | (!ic->to_forward || si_opposite(si)->state != SI_ST_EST)) || |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 226 | |
| 227 | /* changes on the consumption side */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 228 | (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) || |
| 229 | ((oc->flags & CF_WRITE_ACTIVITY) && |
| 230 | ((oc->flags & CF_SHUTW) || |
| 231 | ((oc->flags & CF_WAKE_WRITE) && |
Willy Tarreau | 50fe03b | 2014-11-28 13:59:31 +0100 | [diff] [blame] | 232 | (si_opposite(si)->state != SI_ST_EST || |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 233 | (channel_is_empty(oc) && !oc->to_forward)))))) { |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 234 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 235 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 236 | } |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 237 | if (ic->flags & CF_READ_ACTIVITY) |
| 238 | ic->flags &= ~CF_READ_DONTWAIT; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 239 | } |
| 240 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 241 | /* |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 242 | * This function performs a shutdown-read on a detached stream interface in a |
| 243 | * connected or init state (it does nothing for other states). It either shuts |
| 244 | * the read side or marks itself as closed. The buffer flags are updated to |
| 245 | * reflect the new state. If the stream interface has SI_FL_NOHALF, we also |
| 246 | * forward the close to the write side. The owner task is woken up if it exists. |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 247 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 248 | static void stream_int_shutr(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 249 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 250 | struct channel *ic = si_ic(si); |
| 251 | |
| 252 | ic->flags &= ~CF_SHUTR_NOW; |
| 253 | if (ic->flags & CF_SHUTR) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 254 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 255 | ic->flags |= CF_SHUTR; |
| 256 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 257 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 258 | |
| 259 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 260 | return; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 261 | |
Willy Tarreau | 2bb4a96 | 2014-11-28 11:11:05 +0100 | [diff] [blame] | 262 | if (si_oc(si)->flags & CF_SHUTW) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 263 | si->state = SI_ST_DIS; |
| 264 | si->exp = TICK_ETERNITY; |
Willy Tarreau | d8ccffe | 2010-09-07 16:16:50 +0200 | [diff] [blame] | 265 | } |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 266 | else if (si->flags & SI_FL_NOHALF) { |
| 267 | /* we want to immediately forward this close to the write side */ |
| 268 | return stream_int_shutw(si); |
| 269 | } |
Willy Tarreau | 0bd05ea | 2010-07-02 11:18:03 +0200 | [diff] [blame] | 270 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 271 | /* 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] | 272 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 273 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 274 | } |
| 275 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 276 | /* |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 277 | * This function performs a shutdown-write on a detached stream interface in a |
| 278 | * connected or init state (it does nothing for other states). It either shuts |
| 279 | * the write side or marks itself as closed. The buffer flags are updated to |
| 280 | * reflect the new state. It does also close everything if the SI was marked as |
| 281 | * being in error state. The owner task is woken up if it exists. |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 282 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 283 | static void stream_int_shutw(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 284 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 285 | struct channel *ic = si_ic(si); |
| 286 | struct channel *oc = si_oc(si); |
| 287 | |
| 288 | oc->flags &= ~CF_SHUTW_NOW; |
| 289 | if (oc->flags & CF_SHUTW) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 290 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 291 | oc->flags |= CF_SHUTW; |
| 292 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 293 | si->flags &= ~SI_FL_WAIT_DATA; |
| 294 | |
| 295 | switch (si->state) { |
| 296 | case SI_ST_EST: |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 297 | /* we have to shut before closing, otherwise some short messages |
| 298 | * may never leave the system, especially when there are remaining |
| 299 | * unread data in the socket input buffer, or when nolinger is set. |
| 300 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 301 | * no risk so we close both sides immediately. |
| 302 | */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 303 | if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) && |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 304 | !(ic->flags & (CF_SHUTR|CF_DONT_READ))) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 305 | return; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 306 | |
| 307 | /* fall through */ |
| 308 | case SI_ST_CON: |
| 309 | case SI_ST_CER: |
Willy Tarreau | 32d3ee9 | 2010-12-29 14:03:02 +0100 | [diff] [blame] | 310 | case SI_ST_QUE: |
| 311 | case SI_ST_TAR: |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 312 | /* Note that none of these states may happen with applets */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 313 | si->state = SI_ST_DIS; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 314 | default: |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 315 | si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 316 | ic->flags &= ~CF_SHUTR_NOW; |
| 317 | ic->flags |= CF_SHUTR; |
| 318 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 319 | si->exp = TICK_ETERNITY; |
| 320 | } |
| 321 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 322 | /* 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] | 323 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 324 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 325 | } |
| 326 | |
| 327 | /* default chk_rcv function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 328 | static void stream_int_chk_rcv(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 329 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 330 | struct channel *ic = si_ic(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 331 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 332 | 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] | 333 | __FUNCTION__, |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 334 | si, si->state, ic->flags, si_oc(si)->flags); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 335 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 336 | if (unlikely(si->state != SI_ST_EST || (ic->flags & (CF_SHUTR|CF_DONT_READ)))) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 337 | return; |
| 338 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 339 | if (!channel_may_recv(ic) || ic->pipe) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 340 | /* stop reading */ |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 341 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 342 | } |
| 343 | else { |
| 344 | /* (re)start reading */ |
| 345 | si->flags &= ~SI_FL_WAIT_ROOM; |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 346 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 347 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 348 | } |
| 349 | } |
| 350 | |
| 351 | /* default chk_snd function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 352 | static void stream_int_chk_snd(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 353 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 354 | struct channel *oc = si_oc(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 355 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 356 | 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] | 357 | __FUNCTION__, |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 358 | si, si->state, si_ic(si)->flags, oc->flags); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 359 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 360 | if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW))) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 361 | return; |
| 362 | |
| 363 | if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 364 | channel_is_empty(oc)) /* called with nothing to send ! */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 365 | return; |
| 366 | |
| 367 | /* Otherwise there are remaining data to be sent in the buffer, |
| 368 | * so we tell the handler. |
| 369 | */ |
| 370 | si->flags &= ~SI_FL_WAIT_DATA; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 371 | if (!tick_isset(oc->wex)) |
| 372 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 373 | |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 374 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 375 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 376 | } |
| 377 | |
Willy Tarreau | a9ff5e6 | 2015-07-19 18:46:30 +0200 | [diff] [blame^] | 378 | /* Register an applet to handle a stream_interface as a new appctx. The SI will |
| 379 | * wake it up everytime it is solicited. The appctx must be deleted by the task |
| 380 | * handler using si_release_endpoint(), possibly from within the function itself. |
| 381 | * It also pre-initializes the applet's context and returns it (or NULL in case |
| 382 | * it could not be allocated). |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 383 | */ |
Willy Tarreau | 3057645 | 2015-04-13 13:50:30 +0200 | [diff] [blame] | 384 | struct appctx *stream_int_register_handler(struct stream_interface *si, struct applet *app) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 385 | { |
Willy Tarreau | 0a23bcb | 2013-12-01 11:31:38 +0100 | [diff] [blame] | 386 | struct appctx *appctx; |
| 387 | |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 388 | 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] | 389 | |
Willy Tarreau | a7513f5 | 2015-04-05 00:15:26 +0200 | [diff] [blame] | 390 | appctx = si_alloc_appctx(si, app); |
Willy Tarreau | a69fc9f | 2014-12-22 19:34:00 +0100 | [diff] [blame] | 391 | if (!appctx) |
Willy Tarreau | 0a23bcb | 2013-12-01 11:31:38 +0100 | [diff] [blame] | 392 | return NULL; |
| 393 | |
Willy Tarreau | fe12793 | 2015-04-21 19:23:39 +0200 | [diff] [blame] | 394 | si_applet_cant_get(si); |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 395 | appctx_wakeup(appctx); |
Willy Tarreau | 1fbe1c9 | 2013-12-01 09:35:41 +0100 | [diff] [blame] | 396 | return si_appctx(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 397 | } |
| 398 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 399 | /* Unregister a stream interface handler. This must be called by the handler task |
Willy Tarreau | 128b03c | 2012-11-11 23:14:16 +0100 | [diff] [blame] | 400 | * itself when it detects that it is in the SI_ST_DIS state. |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 401 | */ |
| 402 | void stream_int_unregister_handler(struct stream_interface *si) |
| 403 | { |
Willy Tarreau | 32e3c6a | 2013-10-11 19:34:20 +0200 | [diff] [blame] | 404 | si_detach(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 405 | } |
| 406 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 407 | /* 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] | 408 | * established. It returns 0 if it fails in a fatal way or needs to poll to go |
| 409 | * 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] | 410 | * flags (the bit is provided in <flag> by the caller). It is designed to be |
| 411 | * 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] | 412 | * Note that it can emit a PROXY line by relying on the other end's address |
| 413 | * when the connection is attached to a stream interface, or by resolving the |
| 414 | * local address otherwise (also called a LOCAL line). |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 415 | */ |
| 416 | int conn_si_send_proxy(struct connection *conn, unsigned int flag) |
| 417 | { |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 418 | /* we might have been called just after an asynchronous shutw */ |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 419 | if (conn->flags & CO_FL_SOCK_WR_SH) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 420 | goto out_error; |
| 421 | |
Willy Tarreau | d02cdd2 | 2013-12-15 10:23:20 +0100 | [diff] [blame] | 422 | if (!conn_ctrl_ready(conn)) |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 423 | goto out_error; |
| 424 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 425 | /* If we have a PROXY line to send, we'll use this to validate the |
| 426 | * connection, in which case the connection is validated only once |
| 427 | * we've sent the whole proxy line. Otherwise we use connect(). |
| 428 | */ |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 429 | while (conn->send_proxy_ofs) { |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 430 | int ret; |
| 431 | |
| 432 | /* The target server expects a PROXY line to be sent first. |
| 433 | * If the send_proxy_ofs is negative, it corresponds to the |
| 434 | * offset to start sending from then end of the proxy string |
| 435 | * (which is recomputed every time since it's constant). If |
| 436 | * it is positive, it means we have to send from the start. |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 437 | * We can only send a "normal" PROXY line when the connection |
| 438 | * is attached to a stream interface. Otherwise we can only |
| 439 | * send a LOCAL line (eg: for use with health checks). |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 440 | */ |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 441 | if (conn->data == &si_conn_cb) { |
| 442 | struct stream_interface *si = conn->owner; |
Willy Tarreau | 50fe03b | 2014-11-28 13:59:31 +0100 | [diff] [blame] | 443 | struct connection *remote = objt_conn(si_opposite(si)->end); |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 444 | ret = make_proxy_line(trash.str, trash.size, objt_server(conn->target), remote); |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 445 | } |
| 446 | else { |
| 447 | /* The target server expects a LOCAL line to be sent first. Retrieving |
| 448 | * local or remote addresses may fail until the connection is established. |
| 449 | */ |
| 450 | conn_get_from_addr(conn); |
| 451 | if (!(conn->flags & CO_FL_ADDR_FROM_SET)) |
| 452 | goto out_wait; |
| 453 | |
| 454 | conn_get_to_addr(conn); |
| 455 | if (!(conn->flags & CO_FL_ADDR_TO_SET)) |
| 456 | goto out_wait; |
| 457 | |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 458 | ret = make_proxy_line(trash.str, trash.size, objt_server(conn->target), conn); |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 459 | } |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 460 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 461 | if (!ret) |
| 462 | goto out_error; |
| 463 | |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 464 | if (conn->send_proxy_ofs > 0) |
| 465 | conn->send_proxy_ofs = -ret; /* first call */ |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 466 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 467 | /* we have to send trash from (ret+sp for -sp bytes). If the |
| 468 | * data layer has a pending write, we'll also set MSG_MORE. |
| 469 | */ |
Willy Tarreau | 0a03c0f | 2015-03-13 00:05:28 +0100 | [diff] [blame] | 470 | ret = conn_sock_send(conn, trash.str + ret + conn->send_proxy_ofs, -conn->send_proxy_ofs, |
| 471 | (conn->flags & CO_FL_DATA_WR_ENA) ? MSG_MORE : 0); |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 472 | |
Willy Tarreau | 0a03c0f | 2015-03-13 00:05:28 +0100 | [diff] [blame] | 473 | if (ret < 0) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 474 | goto out_error; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 475 | |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 476 | conn->send_proxy_ofs += ret; /* becomes zero once complete */ |
| 477 | if (conn->send_proxy_ofs != 0) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 478 | goto out_wait; |
| 479 | |
| 480 | /* OK we've sent the whole line, we're connected */ |
Willy Tarreau | 7fe4569 | 2013-12-04 23:37:56 +0100 | [diff] [blame] | 481 | break; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 482 | } |
| 483 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 484 | /* The connection is ready now, simply return and let the connection |
| 485 | * handler notify upper layers if needed. |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 486 | */ |
| 487 | if (conn->flags & CO_FL_WAIT_L4_CONN) |
| 488 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 489 | conn->flags &= ~flag; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 490 | return 1; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 491 | |
| 492 | out_error: |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 493 | /* Write error on the file descriptor */ |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 494 | conn->flags |= CO_FL_ERROR; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 495 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 496 | |
| 497 | out_wait: |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 498 | __conn_sock_stop_recv(conn); |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 499 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 500 | } |
| 501 | |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 502 | |
| 503 | /* Tiny I/O callback called on recv/send I/O events on idle connections. |
| 504 | * It simply sets the CO_FL_SOCK_RD_SH flag so that si_idle_conn_wake_cb() |
| 505 | * is notified and can kill the connection. |
| 506 | */ |
| 507 | static void si_idle_conn_null_cb(struct connection *conn) |
| 508 | { |
Willy Tarreau | d85c485 | 2015-03-13 00:40:28 +0100 | [diff] [blame] | 509 | conn_sock_drain(conn); |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 510 | } |
| 511 | |
| 512 | /* Callback to be used by connection I/O handlers when some activity is detected |
| 513 | * on an idle server connection. Its main purpose is to kill the connection once |
| 514 | * a close was detected on it. It returns 0 if it did nothing serious, or -1 if |
| 515 | * it killed the connection. |
| 516 | */ |
| 517 | static int si_idle_conn_wake_cb(struct connection *conn) |
| 518 | { |
| 519 | struct stream_interface *si = conn->owner; |
| 520 | |
| 521 | if (!conn_ctrl_ready(conn)) |
| 522 | return 0; |
| 523 | |
| 524 | if (conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH)) { |
| 525 | /* warning, we can't do anything on <conn> after this call ! */ |
| 526 | conn_force_close(conn); |
| 527 | conn_free(conn); |
| 528 | si->end = NULL; |
| 529 | return -1; |
| 530 | } |
| 531 | return 0; |
| 532 | } |
| 533 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 534 | /* Callback to be used by connection I/O handlers upon completion. It differs from |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 535 | * the update function in that it is designed to be called by lower layers after I/O |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 536 | * events have been completed. It will also try to wake the associated task up if |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 537 | * an important event requires special handling. It relies on the connection handler |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 538 | * to commit any polling updates. The function always returns 0. |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 539 | */ |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 540 | static int si_conn_wake_cb(struct connection *conn) |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 541 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 542 | struct stream_interface *si = conn->owner; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 543 | struct channel *ic = si_ic(si); |
| 544 | struct channel *oc = si_oc(si); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 545 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 546 | DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n", |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 547 | __FUNCTION__, |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 548 | si, si->state, ic->flags, oc->flags); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 549 | |
Willy Tarreau | 3c55ec2 | 2012-07-23 19:19:51 +0200 | [diff] [blame] | 550 | if (conn->flags & CO_FL_ERROR) |
| 551 | si->flags |= SI_FL_ERR; |
| 552 | |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 553 | /* check for recent connection establishment */ |
Willy Tarreau | c76ae33 | 2012-07-12 15:32:13 +0200 | [diff] [blame] | 554 | if (unlikely(!(conn->flags & (CO_FL_WAIT_L4_CONN | CO_FL_WAIT_L6_CONN | CO_FL_CONNECTED)))) { |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 555 | si->exp = TICK_ETERNITY; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 556 | oc->flags |= CF_WRITE_NULL; |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 557 | } |
| 558 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 559 | /* process consumer side */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 560 | if (channel_is_empty(oc)) { |
| 561 | if (((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 562 | (si->state == SI_ST_EST)) |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 563 | stream_int_shutw_conn(si); |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 564 | __conn_data_stop_send(conn); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 565 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 566 | } |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 567 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 568 | if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0 && channel_may_recv(oc)) |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 569 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 570 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 571 | if (oc->flags & CF_WRITE_ACTIVITY) { |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 572 | /* update timeouts if we have written something */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 573 | if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
| 574 | !channel_is_empty(oc)) |
| 575 | if (tick_isset(oc->wex)) |
| 576 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 577 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 578 | if (!(si->flags & SI_FL_INDEP_STR)) |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 579 | if (tick_isset(ic->rex)) |
| 580 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 581 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 582 | if (likely((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL|CF_DONT_READ)) == CF_WRITE_PARTIAL && |
| 583 | channel_may_recv(oc) && |
Willy Tarreau | 50fe03b | 2014-11-28 13:59:31 +0100 | [diff] [blame] | 584 | (si_opposite(si)->flags & SI_FL_WAIT_ROOM))) |
| 585 | si_chk_rcv(si_opposite(si)); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 586 | } |
| 587 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 588 | /* process producer side. |
| 589 | * We might have some data the consumer is waiting for. |
| 590 | * We can do fast-forwarding, but we avoid doing this for partial |
| 591 | * buffers, because it is very likely that it will be done again |
| 592 | * immediately afterwards once the following data is parsed (eg: |
| 593 | * HTTP chunking). |
| 594 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 595 | if (((ic->flags & CF_READ_PARTIAL) && !channel_is_empty(ic)) && |
| 596 | (ic->pipe /* always try to send spliced data */ || |
Willy Tarreau | 50fe03b | 2014-11-28 13:59:31 +0100 | [diff] [blame] | 597 | (si_ib(si)->i == 0 && (si_opposite(si)->flags & SI_FL_WAIT_DATA)))) { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 598 | int last_len = ic->pipe ? ic->pipe->data : 0; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 599 | |
Willy Tarreau | 50fe03b | 2014-11-28 13:59:31 +0100 | [diff] [blame] | 600 | si_chk_snd(si_opposite(si)); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 601 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 602 | /* check if the consumer has freed some space either in the |
| 603 | * buffer or in the pipe. |
| 604 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 605 | if (channel_may_recv(ic) && |
| 606 | (!last_len || !ic->pipe || ic->pipe->data < last_len)) |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 607 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 608 | } |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 609 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 610 | if (si->flags & SI_FL_WAIT_ROOM) { |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 611 | __conn_data_stop_recv(conn); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 612 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 613 | } |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 614 | else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ)) == CF_READ_PARTIAL && |
| 615 | channel_may_recv(ic)) { |
Willy Tarreau | 9f7c6a1 | 2012-11-19 16:43:14 +0100 | [diff] [blame] | 616 | /* we must re-enable reading if si_chk_snd() has freed some space */ |
| 617 | __conn_data_want_recv(conn); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 618 | if (!(ic->flags & CF_READ_NOEXP) && tick_isset(ic->rex)) |
| 619 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 620 | } |
| 621 | |
| 622 | /* wake the task up only when needed */ |
| 623 | if (/* changes on the production side */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 624 | (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) || |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 625 | si->state != SI_ST_EST || |
| 626 | (si->flags & SI_FL_ERR) || |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 627 | ((ic->flags & CF_READ_PARTIAL) && |
| 628 | (!ic->to_forward || si_opposite(si)->state != SI_ST_EST)) || |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 629 | |
| 630 | /* changes on the consumption side */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 631 | (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) || |
| 632 | ((oc->flags & CF_WRITE_ACTIVITY) && |
| 633 | ((oc->flags & CF_SHUTW) || |
| 634 | ((oc->flags & CF_WAKE_WRITE) && |
Willy Tarreau | 50fe03b | 2014-11-28 13:59:31 +0100 | [diff] [blame] | 635 | (si_opposite(si)->state != SI_ST_EST || |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 636 | (channel_is_empty(oc) && !oc->to_forward)))))) { |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 637 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 638 | } |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 639 | if (ic->flags & CF_READ_ACTIVITY) |
| 640 | ic->flags &= ~CF_READ_DONTWAIT; |
Willy Tarreau | 10fc09e | 2014-11-25 19:46:36 +0100 | [diff] [blame] | 641 | |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 642 | stream_release_buffers(si_strm(si)); |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 643 | return 0; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 644 | } |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 645 | |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 646 | /* |
| 647 | * This function is called to send buffer data to a stream socket. |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 648 | * It calls the transport layer's snd_buf function. It relies on the |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 649 | * caller to commit polling changes. The caller should check conn->flags |
| 650 | * for errors. |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 651 | */ |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 652 | static void si_conn_send(struct connection *conn) |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 653 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 654 | struct stream_interface *si = conn->owner; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 655 | struct channel *oc = si_oc(si); |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 656 | int ret; |
| 657 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 658 | if (oc->pipe && conn->xprt->snd_pipe) { |
| 659 | ret = conn->xprt->snd_pipe(conn, oc->pipe); |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 660 | if (ret > 0) |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 661 | oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 662 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 663 | if (!oc->pipe->data) { |
| 664 | put_pipe(oc->pipe); |
| 665 | oc->pipe = NULL; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 666 | } |
| 667 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 668 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 669 | return; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 670 | } |
| 671 | |
| 672 | /* At this point, the pipe is empty, but we may still have data pending |
| 673 | * in the normal buffer. |
| 674 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 675 | if (!oc->buf->o) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 676 | return; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 677 | |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 678 | /* when we're here, we already know that there is no spliced |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 679 | * data left, and that there are sendable buffered data. |
| 680 | */ |
Willy Tarreau | 310987a | 2014-01-22 19:46:33 +0100 | [diff] [blame] | 681 | if (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_WR_SH | CO_FL_DATA_WR_SH | CO_FL_WAIT_DATA | CO_FL_HANDSHAKE))) { |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 682 | /* check if we want to inform the kernel that we're interested in |
| 683 | * sending more data after this call. We want this if : |
| 684 | * - we're about to close after this last send and want to merge |
| 685 | * the ongoing FIN with the last segment. |
| 686 | * - we know we can't send everything at once and must get back |
| 687 | * here because of unaligned data |
| 688 | * - there is still a finite amount of data to forward |
| 689 | * The test is arranged so that the most common case does only 2 |
| 690 | * tests. |
| 691 | */ |
Willy Tarreau | 1049b1f | 2014-02-02 01:51:17 +0100 | [diff] [blame] | 692 | unsigned int send_flag = 0; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 693 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 694 | if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) && |
| 695 | ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) || |
| 696 | (oc->flags & CF_EXPECT_MORE))) || |
| 697 | ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW)) |
Willy Tarreau | 1049b1f | 2014-02-02 01:51:17 +0100 | [diff] [blame] | 698 | send_flag |= CO_SFL_MSG_MORE; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 699 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 700 | if (oc->flags & CF_STREAMER) |
Willy Tarreau | 7bed945 | 2014-02-02 02:00:24 +0100 | [diff] [blame] | 701 | send_flag |= CO_SFL_STREAMER; |
| 702 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 703 | ret = conn->xprt->snd_buf(conn, oc->buf, send_flag); |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 704 | if (ret > 0) { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 705 | oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 706 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 707 | if (!oc->buf->o) { |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 708 | /* 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] | 709 | oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT); |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 710 | } |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 711 | |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 712 | /* if some data remain in the buffer, it's only because the |
| 713 | * system buffers are full, we will try next time. |
| 714 | */ |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 715 | } |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 716 | } |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 717 | } |
| 718 | |
| 719 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 720 | /* Updates the timers and flags of a stream interface attached to a connection, |
| 721 | * depending on the buffers' flags. It should only be called once after the |
| 722 | * buffer flags have settled down, and before they are cleared. It doesn't |
| 723 | * harm to call it as often as desired (it just slightly hurts performance). |
| 724 | * It is only meant to be called by upper layers after buffer flags have been |
| 725 | * manipulated by analysers. |
| 726 | */ |
| 727 | void stream_int_update_conn(struct stream_interface *si) |
| 728 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 729 | struct channel *ic = si_ic(si); |
| 730 | struct channel *oc = si_oc(si); |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 731 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 732 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 733 | /* Check if we need to close the read side */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 734 | if (!(ic->flags & CF_SHUTR)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 735 | /* Read not closed, update FD status and timeout for reads */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 736 | if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 737 | /* stop reading */ |
| 738 | if (!(si->flags & SI_FL_WAIT_ROOM)) { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 739 | if (!(ic->flags & CF_DONT_READ)) /* full */ |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 740 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 741 | conn_data_stop_recv(conn); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 742 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 743 | } |
| 744 | } |
| 745 | else { |
| 746 | /* (re)start reading and update timeout. Note: we don't recompute the timeout |
| 747 | * everytime we get here, otherwise it would risk never to expire. We only |
| 748 | * update it if is was not yet set. The stream socket handler will already |
| 749 | * have updated it if there has been a completed I/O. |
| 750 | */ |
| 751 | si->flags &= ~SI_FL_WAIT_ROOM; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 752 | conn_data_want_recv(conn); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 753 | if (!(ic->flags & (CF_READ_NOEXP|CF_DONT_READ)) && !tick_isset(ic->rex)) |
| 754 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 755 | } |
| 756 | } |
| 757 | |
| 758 | /* Check if we need to close the write side */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 759 | if (!(oc->flags & CF_SHUTW)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 760 | /* Write not closed, update FD status and timeout for writes */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 761 | if (channel_is_empty(oc)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 762 | /* stop writing */ |
| 763 | if (!(si->flags & SI_FL_WAIT_DATA)) { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 764 | if ((oc->flags & CF_SHUTW_NOW) == 0) |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 765 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 766 | conn_data_stop_send(conn); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 767 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 768 | } |
| 769 | } |
| 770 | else { |
| 771 | /* (re)start writing and update timeout. Note: we don't recompute the timeout |
| 772 | * everytime we get here, otherwise it would risk never to expire. We only |
| 773 | * update it if is was not yet set. The stream socket handler will already |
| 774 | * have updated it if there has been a completed I/O. |
| 775 | */ |
| 776 | si->flags &= ~SI_FL_WAIT_DATA; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 777 | conn_data_want_send(conn); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 778 | if (!tick_isset(oc->wex)) { |
| 779 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
| 780 | if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 781 | /* Note: depending on the protocol, we don't know if we're waiting |
| 782 | * for incoming data or not. So in order to prevent the socket from |
| 783 | * expiring read timeouts during writes, we refresh the read timeout, |
| 784 | * except if it was already infinite or if we have explicitly setup |
| 785 | * independent streams. |
| 786 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 787 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 788 | } |
| 789 | } |
| 790 | } |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 791 | } |
| 792 | } |
| 793 | |
| 794 | /* |
| 795 | * This function performs a shutdown-read on a stream interface attached to |
| 796 | * a connection in a connected or init state (it does nothing for other |
| 797 | * states). It either shuts the read side or marks itself as closed. The buffer |
| 798 | * flags are updated to reflect the new state. If the stream interface has |
| 799 | * SI_FL_NOHALF, we also forward the close to the write side. If a control |
| 800 | * 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] | 801 | * descriptors are then shutdown or closed accordingly. The function |
| 802 | * automatically disables polling if needed. |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 803 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 804 | static void stream_int_shutr_conn(struct stream_interface *si) |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 805 | { |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 806 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 807 | struct channel *ic = si_ic(si); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 808 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 809 | ic->flags &= ~CF_SHUTR_NOW; |
| 810 | if (ic->flags & CF_SHUTR) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 811 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 812 | ic->flags |= CF_SHUTR; |
| 813 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 814 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 815 | |
| 816 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 817 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 818 | |
Willy Tarreau | 2bb4a96 | 2014-11-28 11:11:05 +0100 | [diff] [blame] | 819 | if (si_oc(si)->flags & CF_SHUTW) { |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 820 | conn_full_close(conn); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 821 | si->state = SI_ST_DIS; |
| 822 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 823 | } |
| 824 | else if (si->flags & SI_FL_NOHALF) { |
| 825 | /* we want to immediately forward this close to the write side */ |
| 826 | return stream_int_shutw_conn(si); |
| 827 | } |
| 828 | else if (conn->ctrl) { |
| 829 | /* we want the caller to disable polling on this FD */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 830 | conn_data_stop_recv(conn); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 831 | } |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 832 | } |
| 833 | |
| 834 | /* |
| 835 | * This function performs a shutdown-write on a stream interface attached to |
| 836 | * a connection in a connected or init state (it does nothing for other |
| 837 | * states). It either shuts the write side or marks itself as closed. The |
| 838 | * buffer flags are updated to reflect the new state. It does also close |
| 839 | * 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] | 840 | * data-layer shutdown, it is called. |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 841 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 842 | static void stream_int_shutw_conn(struct stream_interface *si) |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 843 | { |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 844 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 845 | struct channel *ic = si_ic(si); |
| 846 | struct channel *oc = si_oc(si); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 847 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 848 | oc->flags &= ~CF_SHUTW_NOW; |
| 849 | if (oc->flags & CF_SHUTW) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 850 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 851 | oc->flags |= CF_SHUTW; |
| 852 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 853 | si->flags &= ~SI_FL_WAIT_DATA; |
| 854 | |
| 855 | switch (si->state) { |
| 856 | case SI_ST_EST: |
| 857 | /* we have to shut before closing, otherwise some short messages |
| 858 | * may never leave the system, especially when there are remaining |
| 859 | * unread data in the socket input buffer, or when nolinger is set. |
| 860 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 861 | * no risk so we close both sides immediately. |
| 862 | */ |
| 863 | if (si->flags & SI_FL_ERR) { |
| 864 | /* quick close, the socket is alredy shut anyway */ |
| 865 | } |
| 866 | else if (si->flags & SI_FL_NOLINGER) { |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 867 | /* unclean data-layer shutdown */ |
Willy Tarreau | 1398aa1 | 2015-03-12 23:04:07 +0100 | [diff] [blame] | 868 | conn_data_shutw_hard(conn); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 869 | } |
| 870 | else { |
| 871 | /* clean data-layer shutdown */ |
Willy Tarreau | 1398aa1 | 2015-03-12 23:04:07 +0100 | [diff] [blame] | 872 | conn_data_shutw(conn); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 873 | |
| 874 | /* If the stream interface is configured to disable half-open |
| 875 | * connections, we'll skip the shutdown(), but only if the |
| 876 | * read size is already closed. Otherwise we can't support |
| 877 | * closed write with pending read (eg: abortonclose while |
| 878 | * waiting for the server). |
| 879 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 880 | if (!(si->flags & SI_FL_NOHALF) || !(ic->flags & (CF_SHUTR|CF_DONT_READ))) { |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 881 | /* We shutdown transport layer */ |
Willy Tarreau | 4dfd54f | 2015-03-12 22:44:53 +0100 | [diff] [blame] | 882 | conn_sock_shutw(conn); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 883 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 884 | if (!(ic->flags & (CF_SHUTR|CF_DONT_READ))) { |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 885 | /* OK just a shutw, but we want the caller |
| 886 | * to disable polling on this FD if exists. |
| 887 | */ |
Willy Tarreau | 1398aa1 | 2015-03-12 23:04:07 +0100 | [diff] [blame] | 888 | conn_cond_update_polling(conn); |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 889 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 890 | } |
| 891 | } |
| 892 | } |
| 893 | |
| 894 | /* fall through */ |
| 895 | case SI_ST_CON: |
| 896 | /* we may have to close a pending connection, and mark the |
| 897 | * response buffer as shutr |
| 898 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 899 | conn_full_close(conn); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 900 | /* fall through */ |
| 901 | case SI_ST_CER: |
| 902 | case SI_ST_QUE: |
| 903 | case SI_ST_TAR: |
| 904 | si->state = SI_ST_DIS; |
Willy Tarreau | 4a59f2f | 2013-10-24 20:10:45 +0200 | [diff] [blame] | 905 | /* fall through */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 906 | default: |
| 907 | si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 908 | ic->flags &= ~CF_SHUTR_NOW; |
| 909 | ic->flags |= CF_SHUTR; |
| 910 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 911 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 912 | } |
| 913 | } |
| 914 | |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 915 | /* This function is used for inter-stream-interface calls. It is called by the |
| 916 | * consumer to inform the producer side that it may be interested in checking |
| 917 | * for free space in the buffer. Note that it intentionally does not update |
| 918 | * timeouts, so that we can still check them later at wake-up. This function is |
| 919 | * dedicated to connection-based stream interfaces. |
| 920 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 921 | static void stream_int_chk_rcv_conn(struct stream_interface *si) |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 922 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 923 | struct channel *ic = si_ic(si); |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 924 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 925 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 926 | if (unlikely(si->state > SI_ST_EST || (ic->flags & CF_SHUTR))) |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 927 | return; |
| 928 | |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 929 | conn_refresh_polling_flags(conn); |
Willy Tarreau | 7d28149 | 2012-12-16 19:19:13 +0100 | [diff] [blame] | 930 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 931 | if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) { |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 932 | /* stop reading */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 933 | if (!(ic->flags & CF_DONT_READ)) /* full */ |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 934 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 935 | __conn_data_stop_recv(conn); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 936 | } |
| 937 | else { |
| 938 | /* (re)start reading */ |
| 939 | si->flags &= ~SI_FL_WAIT_ROOM; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 940 | __conn_data_want_recv(conn); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 941 | } |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 942 | conn_cond_update_data_polling(conn); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 943 | } |
| 944 | |
| 945 | |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 946 | /* This function is used for inter-stream-interface calls. It is called by the |
| 947 | * producer to inform the consumer side that it may be interested in checking |
| 948 | * for data in the buffer. Note that it intentionally does not update timeouts, |
| 949 | * so that we can still check them later at wake-up. |
| 950 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 951 | static void stream_int_chk_snd_conn(struct stream_interface *si) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 952 | { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 953 | struct channel *oc = si_oc(si); |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 954 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 955 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 956 | if (unlikely(si->state > SI_ST_EST || (oc->flags & CF_SHUTW))) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 957 | return; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 958 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 959 | if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 960 | return; |
| 961 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 962 | if (!oc->pipe && /* spliced data wants to be forwarded ASAP */ |
Willy Tarreau | b016587 | 2012-12-15 10:12:39 +0100 | [diff] [blame] | 963 | !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 964 | return; |
| 965 | |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 966 | if (conn->flags & (CO_FL_DATA_WR_ENA|CO_FL_CURR_WR_ENA)) { |
Willy Tarreau | 5007d2a | 2013-07-18 22:09:48 +0200 | [diff] [blame] | 967 | /* already subscribed to write notifications, will be called |
| 968 | * anyway, so let's avoid calling it especially if the reader |
| 969 | * is not ready. |
| 970 | */ |
| 971 | return; |
| 972 | } |
| 973 | |
Willy Tarreau | 708e717 | 2014-01-21 10:27:49 +0100 | [diff] [blame] | 974 | /* Before calling the data-level operations, we have to prepare |
| 975 | * the polling flags to ensure we properly detect changes. |
| 976 | */ |
| 977 | conn_refresh_polling_flags(conn); |
| 978 | __conn_data_want_send(conn); |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 979 | |
Willy Tarreau | 708e717 | 2014-01-21 10:27:49 +0100 | [diff] [blame] | 980 | if (!(conn->flags & (CO_FL_HANDSHAKE|CO_FL_WAIT_L4_CONN|CO_FL_WAIT_L6_CONN))) { |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 981 | si_conn_send(conn); |
Willy Tarreau | 798c3c9 | 2014-01-21 10:30:08 +0100 | [diff] [blame] | 982 | if (conn->flags & CO_FL_ERROR) { |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 983 | /* Write error on the file descriptor */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 984 | __conn_data_stop_both(conn); |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 985 | si->flags |= SI_FL_ERR; |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 986 | goto out_wakeup; |
| 987 | } |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 988 | } |
| 989 | |
| 990 | /* OK, so now we know that some data might have been sent, and that we may |
| 991 | * have to poll first. We have to do that too if the buffer is not empty. |
| 992 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 993 | if (channel_is_empty(oc)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 994 | /* the connection is established but we can't write. Either the |
| 995 | * buffer is empty, or we just refrain from sending because the |
| 996 | * ->o limit was reached. Maybe we just wrote the last |
| 997 | * chunk and need to close. |
| 998 | */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 999 | __conn_data_stop_send(conn); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1000 | if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) == |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1001 | (CF_AUTO_CLOSE|CF_SHUTW_NOW)) && |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1002 | (si->state == SI_ST_EST)) { |
| 1003 | si_shutw(si); |
| 1004 | goto out_wakeup; |
| 1005 | } |
| 1006 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1007 | if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1008 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1009 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1010 | } |
| 1011 | else { |
| 1012 | /* Otherwise there are remaining data to be sent in the buffer, |
| 1013 | * which means we have to poll before doing so. |
| 1014 | */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1015 | __conn_data_want_send(conn); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1016 | si->flags &= ~SI_FL_WAIT_DATA; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1017 | if (!tick_isset(oc->wex)) |
| 1018 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1019 | } |
| 1020 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1021 | if (likely(oc->flags & CF_WRITE_ACTIVITY)) { |
| 1022 | struct channel *ic = si_ic(si); |
| 1023 | |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1024 | /* update timeout if we have written something */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1025 | if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
| 1026 | !channel_is_empty(oc)) |
| 1027 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1028 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1029 | if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1030 | /* Note: to prevent the client from expiring read timeouts |
| 1031 | * during writes, we refresh it. We only do this if the |
| 1032 | * interface is not configured for "independent streams", |
| 1033 | * because for some applications it's better not to do this, |
| 1034 | * for instance when continuously exchanging small amounts |
| 1035 | * of data which can full the socket buffers long before a |
| 1036 | * write timeout is detected. |
| 1037 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1038 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1039 | } |
| 1040 | } |
| 1041 | |
| 1042 | /* in case of special condition (error, shutdown, end of write...), we |
| 1043 | * have to notify the task. |
| 1044 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1045 | if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) || |
| 1046 | ((oc->flags & CF_WAKE_WRITE) && |
| 1047 | ((channel_is_empty(oc) && !oc->to_forward) || |
Willy Tarreau | e6300be | 2014-01-25 02:33:21 +0100 | [diff] [blame] | 1048 | si->state != SI_ST_EST)))) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1049 | out_wakeup: |
Willy Tarreau | 07373b8 | 2014-11-28 12:08:47 +0100 | [diff] [blame] | 1050 | if (!(si->flags & SI_FL_DONT_WAKE)) |
| 1051 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1052 | } |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 1053 | |
| 1054 | /* commit possible polling changes */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1055 | conn_cond_update_polling(conn); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1056 | } |
| 1057 | |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1058 | /* |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1059 | * This is the callback which is called by the connection layer to receive data |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 1060 | * into the buffer from the connection. It iterates over the transport layer's |
| 1061 | * rcv_buf function. |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1062 | */ |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 1063 | static void si_conn_recv_cb(struct connection *conn) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1064 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 1065 | struct stream_interface *si = conn->owner; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1066 | struct channel *ic = si_ic(si); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1067 | int ret, max, cur_read; |
| 1068 | int read_poll = MAX_READ_POLL_LOOPS; |
| 1069 | |
| 1070 | /* stop immediately on errors. Note that we DON'T want to stop on |
| 1071 | * POLL_ERR, as the poller might report a write error while there |
| 1072 | * are still data available in the recv buffer. This typically |
| 1073 | * happens when we send too large a request to a backend server |
| 1074 | * which rejects it before reading it all. |
| 1075 | */ |
| 1076 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1077 | return; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1078 | |
| 1079 | /* stop here if we reached the end of data */ |
| 1080 | if (conn_data_read0_pending(conn)) |
| 1081 | goto out_shutdown_r; |
| 1082 | |
| 1083 | /* maybe we were called immediately after an asynchronous shutr */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1084 | if (ic->flags & CF_SHUTR) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1085 | return; |
| 1086 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1087 | cur_read = 0; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1088 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1089 | if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !ic->buf->o && |
Willy Tarreau | 7e31273 | 2014-02-12 16:35:14 +0100 | [diff] [blame] | 1090 | global.tune.idle_timer && |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1091 | (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1092 | /* The buffer was empty and nothing was transferred for more |
| 1093 | * than one second. This was caused by a pause and not by |
| 1094 | * congestion. Reset any streaming mode to reduce latency. |
| 1095 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1096 | ic->xfer_small = 0; |
| 1097 | ic->xfer_large = 0; |
| 1098 | ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1099 | } |
| 1100 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1101 | /* First, let's see if we may splice data across the channel without |
| 1102 | * using a buffer. |
| 1103 | */ |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 1104 | if (conn->xprt->rcv_pipe && |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1105 | (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) && |
| 1106 | ic->flags & CF_KERN_SPLICING) { |
| 1107 | if (buffer_not_empty(ic->buf)) { |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1108 | /* We're embarrassed, there are already data pending in |
| 1109 | * the buffer and we don't want to have them at two |
| 1110 | * locations at a time. Let's indicate we need some |
| 1111 | * place and ask the consumer to hurry. |
| 1112 | */ |
| 1113 | goto abort_splice; |
| 1114 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1115 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1116 | if (unlikely(ic->pipe == NULL)) { |
| 1117 | if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) { |
| 1118 | ic->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1119 | goto abort_splice; |
| 1120 | } |
| 1121 | } |
| 1122 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1123 | ret = conn->xprt->rcv_pipe(conn, ic->pipe, ic->to_forward); |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1124 | if (ret < 0) { |
| 1125 | /* splice not supported on this end, let's disable it */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1126 | ic->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1127 | goto abort_splice; |
| 1128 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1129 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1130 | if (ret > 0) { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1131 | if (ic->to_forward != CHN_INFINITE_FORWARD) |
| 1132 | ic->to_forward -= ret; |
| 1133 | ic->total += ret; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1134 | cur_read += ret; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1135 | ic->flags |= CF_READ_PARTIAL; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1136 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1137 | |
| 1138 | if (conn_data_read0_pending(conn)) |
| 1139 | goto out_shutdown_r; |
| 1140 | |
| 1141 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1142 | return; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1143 | |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1144 | if (conn->flags & CO_FL_WAIT_ROOM) { |
| 1145 | /* the pipe is full or we have read enough data that it |
| 1146 | * could soon be full. Let's stop before needing to poll. |
| 1147 | */ |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1148 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1149 | __conn_data_stop_recv(conn); |
| 1150 | } |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1151 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1152 | /* splice not possible (anymore), let's go on on standard copy */ |
| 1153 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1154 | |
| 1155 | abort_splice: |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1156 | if (ic->pipe && unlikely(!ic->pipe->data)) { |
| 1157 | put_pipe(ic->pipe); |
| 1158 | ic->pipe = NULL; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1159 | } |
| 1160 | |
Willy Tarreau | 10fc09e | 2014-11-25 19:46:36 +0100 | [diff] [blame] | 1161 | /* now we'll need a buffer */ |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 1162 | if (!stream_alloc_recv_buffer(ic)) { |
Willy Tarreau | 10fc09e | 2014-11-25 19:46:36 +0100 | [diff] [blame] | 1163 | si->flags |= SI_FL_WAIT_ROOM; |
| 1164 | goto end_recv; |
| 1165 | } |
| 1166 | |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1167 | /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling |
| 1168 | * was enabled, which implies that the recv buffer was not full. So we have a guarantee |
| 1169 | * that if such an event is not handled above in splice, it will be handled here by |
| 1170 | * recv(). |
| 1171 | */ |
Willy Tarreau | 310987a | 2014-01-22 19:46:33 +0100 | [diff] [blame] | 1172 | while (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_DATA_RD_SH | CO_FL_WAIT_ROOM | CO_FL_HANDSHAKE))) { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1173 | max = channel_recv_max(ic); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1174 | |
| 1175 | if (!max) { |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1176 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1177 | break; |
| 1178 | } |
| 1179 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1180 | ret = conn->xprt->rcv_buf(conn, ic->buf, max); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1181 | if (ret <= 0) |
| 1182 | break; |
| 1183 | |
| 1184 | cur_read += ret; |
| 1185 | |
| 1186 | /* if we're allowed to directly forward data, we must update ->o */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1187 | if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1188 | unsigned long fwd = ret; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1189 | if (ic->to_forward != CHN_INFINITE_FORWARD) { |
| 1190 | if (fwd > ic->to_forward) |
| 1191 | fwd = ic->to_forward; |
| 1192 | ic->to_forward -= fwd; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1193 | } |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1194 | b_adv(ic->buf, fwd); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1195 | } |
| 1196 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1197 | ic->flags |= CF_READ_PARTIAL; |
| 1198 | ic->total += ret; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1199 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1200 | if (!channel_may_recv(ic)) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1201 | si->flags |= SI_FL_WAIT_ROOM; |
| 1202 | break; |
| 1203 | } |
| 1204 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1205 | if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0) { |
Willy Tarreau | 34ac566 | 2012-12-19 18:01:02 +0100 | [diff] [blame] | 1206 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | d486ef5 | 2012-12-10 17:03:52 +0100 | [diff] [blame] | 1207 | __conn_data_stop_recv(conn); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1208 | break; |
Willy Tarreau | 5fddab0 | 2012-11-09 18:27:26 +0100 | [diff] [blame] | 1209 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1210 | |
| 1211 | /* if too many bytes were missing from last read, it means that |
| 1212 | * it's pointless trying to read again because the system does |
| 1213 | * not have them in buffers. |
| 1214 | */ |
| 1215 | if (ret < max) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1216 | /* if a streamer has read few data, it may be because we |
| 1217 | * have exhausted system buffers. It's not worth trying |
| 1218 | * again. |
| 1219 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1220 | if (ic->flags & CF_STREAMER) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1221 | break; |
| 1222 | |
| 1223 | /* if we read a large block smaller than what we requested, |
| 1224 | * it's almost certain we'll never get anything more. |
| 1225 | */ |
| 1226 | if (ret >= global.tune.recv_enough) |
| 1227 | break; |
| 1228 | } |
| 1229 | } /* while !flags */ |
| 1230 | |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1231 | if (cur_read) { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1232 | if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && |
| 1233 | (cur_read <= ic->buf->size / 2)) { |
| 1234 | ic->xfer_large = 0; |
| 1235 | ic->xfer_small++; |
| 1236 | if (ic->xfer_small >= 3) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1237 | /* we have read less than half of the buffer in |
| 1238 | * one pass, and this happened at least 3 times. |
| 1239 | * This is definitely not a streamer. |
| 1240 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1241 | ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1242 | } |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1243 | else if (ic->xfer_small >= 2) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1244 | /* if the buffer has been at least half full twice, |
| 1245 | * we receive faster than we send, so at least it |
| 1246 | * is not a "fast streamer". |
| 1247 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1248 | ic->flags &= ~CF_STREAMER_FAST; |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1249 | } |
| 1250 | } |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1251 | else if (!(ic->flags & CF_STREAMER_FAST) && |
| 1252 | (cur_read >= ic->buf->size - global.tune.maxrewrite)) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1253 | /* we read a full buffer at once */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1254 | ic->xfer_small = 0; |
| 1255 | ic->xfer_large++; |
| 1256 | if (ic->xfer_large >= 3) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1257 | /* we call this buffer a fast streamer if it manages |
| 1258 | * to be filled in one call 3 consecutive times. |
| 1259 | */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1260 | ic->flags |= (CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1261 | } |
| 1262 | } |
| 1263 | else { |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1264 | ic->xfer_small = 0; |
| 1265 | ic->xfer_large = 0; |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1266 | } |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1267 | ic->last_read = now_ms; |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1268 | } |
| 1269 | |
Willy Tarreau | 10fc09e | 2014-11-25 19:46:36 +0100 | [diff] [blame] | 1270 | end_recv: |
| 1271 | if (conn->flags & CO_FL_ERROR) |
| 1272 | return; |
| 1273 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1274 | if (conn_data_read0_pending(conn)) |
| 1275 | /* connection closed */ |
| 1276 | goto out_shutdown_r; |
| 1277 | |
| 1278 | return; |
| 1279 | |
| 1280 | out_shutdown_r: |
| 1281 | /* we received a shutdown */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1282 | ic->flags |= CF_READ_NULL; |
| 1283 | if (ic->flags & CF_AUTO_CLOSE) |
| 1284 | channel_shutw_now(ic); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1285 | stream_sock_read0(si); |
| 1286 | conn_data_read0(conn); |
| 1287 | return; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1288 | } |
| 1289 | |
| 1290 | /* |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1291 | * This is the callback which is called by the connection layer to send data |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 1292 | * from the buffer to the connection. It iterates over the transport layer's |
| 1293 | * snd_buf function. |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1294 | */ |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 1295 | static void si_conn_send_cb(struct connection *conn) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1296 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 1297 | struct stream_interface *si = conn->owner; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1298 | |
| 1299 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1300 | return; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1301 | |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1302 | if (conn->flags & CO_FL_HANDSHAKE) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1303 | /* a handshake was requested */ |
| 1304 | return; |
| 1305 | |
| 1306 | /* we might have been called just after an asynchronous shutw */ |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1307 | if (si_oc(si)->flags & CF_SHUTW) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1308 | return; |
| 1309 | |
| 1310 | /* OK there are data waiting to be sent */ |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1311 | si_conn_send(conn); |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1312 | |
| 1313 | /* OK all done */ |
| 1314 | return; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1315 | } |
| 1316 | |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1317 | /* |
| 1318 | * This function propagates a null read received on a socket-based connection. |
| 1319 | * 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] | 1320 | * the close is also forwarded to the write side as an abort. |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1321 | */ |
| 1322 | void stream_sock_read0(struct stream_interface *si) |
| 1323 | { |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1324 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1325 | struct channel *ic = si_ic(si); |
| 1326 | struct channel *oc = si_oc(si); |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1327 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1328 | ic->flags &= ~CF_SHUTR_NOW; |
| 1329 | if (ic->flags & CF_SHUTR) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1330 | return; |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1331 | ic->flags |= CF_SHUTR; |
| 1332 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1333 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 1334 | |
| 1335 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
| 1336 | return; |
| 1337 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1338 | if (oc->flags & CF_SHUTW) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1339 | goto do_close; |
| 1340 | |
| 1341 | if (si->flags & SI_FL_NOHALF) { |
| 1342 | /* we want to immediately forward this close to the write side */ |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 1343 | /* force flag on ssl to keep stream in cache */ |
Willy Tarreau | 1398aa1 | 2015-03-12 23:04:07 +0100 | [diff] [blame] | 1344 | conn_data_shutw_hard(conn); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1345 | goto do_close; |
| 1346 | } |
| 1347 | |
| 1348 | /* otherwise that's just a normal read shutdown */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1349 | __conn_data_stop_recv(conn); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1350 | return; |
| 1351 | |
| 1352 | do_close: |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1353 | /* OK we completely close the socket here just as if we went through si_shut[rw]() */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1354 | conn_full_close(conn); |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1355 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1356 | ic->flags &= ~CF_SHUTR_NOW; |
| 1357 | ic->flags |= CF_SHUTR; |
| 1358 | ic->rex = TICK_ETERNITY; |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1359 | |
Willy Tarreau | afc8a22 | 2014-11-28 15:46:27 +0100 | [diff] [blame] | 1360 | oc->flags &= ~CF_SHUTW_NOW; |
| 1361 | oc->flags |= CF_SHUTW; |
| 1362 | oc->wex = TICK_ETERNITY; |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1363 | |
| 1364 | si->flags &= ~(SI_FL_WAIT_DATA | SI_FL_WAIT_ROOM); |
| 1365 | |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1366 | si->state = SI_ST_DIS; |
| 1367 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1368 | return; |
| 1369 | } |
| 1370 | |
Willy Tarreau | e5f8649 | 2015-04-19 15:16:35 +0200 | [diff] [blame] | 1371 | /* notifies the stream interface that the applet has completed its work */ |
| 1372 | void si_applet_done(struct stream_interface *si) |
| 1373 | { |
| 1374 | struct channel *ic = si_ic(si); |
| 1375 | struct channel *oc = si_oc(si); |
| 1376 | |
| 1377 | /* process consumer side */ |
| 1378 | if (channel_is_empty(oc)) { |
| 1379 | if (((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) && |
| 1380 | (si->state == SI_ST_EST)) |
| 1381 | stream_int_shutw_applet(si); |
| 1382 | oc->wex = TICK_ETERNITY; |
| 1383 | } |
| 1384 | |
| 1385 | /* indicate that we may be waiting for data from the output channel */ |
| 1386 | if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0 && channel_may_recv(oc)) |
| 1387 | si->flags |= SI_FL_WAIT_DATA; |
| 1388 | |
| 1389 | /* update OC timeouts and wake the other side up if it's waiting for room */ |
| 1390 | if (oc->flags & CF_WRITE_ACTIVITY) { |
| 1391 | if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
| 1392 | !channel_is_empty(oc)) |
| 1393 | if (tick_isset(oc->wex)) |
| 1394 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
| 1395 | |
| 1396 | if (!(si->flags & SI_FL_INDEP_STR)) |
| 1397 | if (tick_isset(ic->rex)) |
| 1398 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
| 1399 | |
| 1400 | if (likely((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL|CF_DONT_READ)) == CF_WRITE_PARTIAL && |
| 1401 | channel_may_recv(oc) && |
| 1402 | (si_opposite(si)->flags & SI_FL_WAIT_ROOM))) |
| 1403 | si_chk_rcv(si_opposite(si)); |
| 1404 | } |
| 1405 | |
| 1406 | /* Notify the other side when we've injected data into the IC that |
| 1407 | * needs to be forwarded. We can do fast-forwarding as soon as there |
| 1408 | * are output data, but we avoid doing this for partial buffers, |
| 1409 | * because it is very likely that it will be done again immediately |
| 1410 | * afterwards once the following data are parsed (eg: HTTP chunking). |
| 1411 | * We only remove SI_FL_WAIT_ROOM once we've emptied the whole output |
| 1412 | * buffer, because applets are often forced to stop before the buffer |
| 1413 | * is full. We must not stop based on input data alone because an HTTP |
| 1414 | * parser might need more data to complete the parsing. |
| 1415 | */ |
| 1416 | if (!channel_is_empty(ic) && |
| 1417 | (si_opposite(si)->flags & SI_FL_WAIT_DATA) && |
| 1418 | (si_ib(si)->i == 0 || ic->pipe)) { |
| 1419 | si_chk_snd(si_opposite(si)); |
| 1420 | if (channel_is_empty(ic)) |
| 1421 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 1422 | } |
| 1423 | |
| 1424 | if (si->flags & SI_FL_WAIT_ROOM) { |
| 1425 | ic->rex = TICK_ETERNITY; |
| 1426 | } |
| 1427 | else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ)) == CF_READ_PARTIAL && |
| 1428 | channel_may_recv(ic)) { |
| 1429 | /* we must re-enable reading if si_chk_snd() has freed some space */ |
| 1430 | if (!(ic->flags & CF_READ_NOEXP) && tick_isset(ic->rex)) |
| 1431 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
| 1432 | } |
| 1433 | |
Willy Tarreau | fe12793 | 2015-04-21 19:23:39 +0200 | [diff] [blame] | 1434 | /* get away from the active list if we can't work anymore. */ |
| 1435 | if (((si->flags & (SI_FL_WANT_PUT|SI_FL_WAIT_ROOM)) != SI_FL_WANT_PUT) && |
| 1436 | ((si->flags & (SI_FL_WANT_GET|SI_FL_WAIT_DATA)) != SI_FL_WANT_GET)) |
Willy Tarreau | e5f8649 | 2015-04-19 15:16:35 +0200 | [diff] [blame] | 1437 | appctx_pause(si_appctx(si)); |
| 1438 | |
| 1439 | /* wake the task up only when needed */ |
| 1440 | if (/* changes on the production side */ |
| 1441 | (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) || |
| 1442 | si->state != SI_ST_EST || |
| 1443 | (si->flags & SI_FL_ERR) || |
| 1444 | ((ic->flags & CF_READ_PARTIAL) && |
| 1445 | (!ic->to_forward || si_opposite(si)->state != SI_ST_EST)) || |
| 1446 | |
| 1447 | /* changes on the consumption side */ |
| 1448 | (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) || |
| 1449 | ((oc->flags & CF_WRITE_ACTIVITY) && |
| 1450 | ((oc->flags & CF_SHUTW) || |
| 1451 | ((oc->flags & CF_WAKE_WRITE) && |
| 1452 | (si_opposite(si)->state != SI_ST_EST || |
| 1453 | (channel_is_empty(oc) && !oc->to_forward)))))) { |
| 1454 | task_wakeup(si_task(si), TASK_WOKEN_IO); |
Willy Tarreau | 0b1a454 | 2015-04-23 11:50:43 +0200 | [diff] [blame] | 1455 | appctx_pause(si_appctx(si)); |
Willy Tarreau | e5f8649 | 2015-04-19 15:16:35 +0200 | [diff] [blame] | 1456 | } |
| 1457 | if (ic->flags & CF_READ_ACTIVITY) |
| 1458 | ic->flags &= ~CF_READ_DONTWAIT; |
| 1459 | |
| 1460 | stream_release_buffers(si_strm(si)); |
| 1461 | } |
| 1462 | |
Willy Tarreau | 563cc37 | 2015-04-19 18:13:56 +0200 | [diff] [blame] | 1463 | /* updates the timers and flags of a stream interface attached to an applet. |
| 1464 | * it's called from the upper layers after the buffers/channels have been |
| 1465 | * updated. |
| 1466 | */ |
| 1467 | void stream_int_update_applet(struct stream_interface *si) |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1468 | { |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1469 | struct channel *ic = si_ic(si); |
| 1470 | struct channel *oc = si_oc(si); |
| 1471 | |
Willy Tarreau | 563cc37 | 2015-04-19 18:13:56 +0200 | [diff] [blame] | 1472 | /* Check if we need to close the read side */ |
| 1473 | if (!(ic->flags & CF_SHUTR)) { |
| 1474 | /* Read not closed, update FD status and timeout for reads */ |
| 1475 | if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) { |
| 1476 | /* stop reading */ |
| 1477 | if (!(si->flags & SI_FL_WAIT_ROOM)) { |
| 1478 | if (!(ic->flags & CF_DONT_READ)) /* full */ |
| 1479 | si->flags |= SI_FL_WAIT_ROOM; |
| 1480 | ic->rex = TICK_ETERNITY; |
| 1481 | } |
| 1482 | } |
| 1483 | else { |
| 1484 | /* (re)start reading and update timeout. Note: we don't recompute the timeout |
| 1485 | * everytime we get here, otherwise it would risk never to expire. We only |
| 1486 | * update it if is was not yet set. The stream socket handler will already |
| 1487 | * have updated it if there has been a completed I/O. |
| 1488 | */ |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1489 | si->flags &= ~SI_FL_WAIT_ROOM; |
Willy Tarreau | 563cc37 | 2015-04-19 18:13:56 +0200 | [diff] [blame] | 1490 | if (!(ic->flags & (CF_READ_NOEXP|CF_DONT_READ)) && !tick_isset(ic->rex)) |
| 1491 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
| 1492 | } |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1493 | } |
| 1494 | |
Willy Tarreau | 563cc37 | 2015-04-19 18:13:56 +0200 | [diff] [blame] | 1495 | /* Check if we need to close the write side */ |
| 1496 | if (!(oc->flags & CF_SHUTW)) { |
| 1497 | /* Write not closed, update FD status and timeout for writes */ |
| 1498 | if (channel_is_empty(oc)) { |
| 1499 | /* stop writing */ |
| 1500 | if (!(si->flags & SI_FL_WAIT_DATA)) { |
| 1501 | if ((oc->flags & CF_SHUTW_NOW) == 0) |
| 1502 | si->flags |= SI_FL_WAIT_DATA; |
| 1503 | oc->wex = TICK_ETERNITY; |
| 1504 | } |
| 1505 | } |
| 1506 | else { |
| 1507 | /* (re)start writing and update timeout. Note: we don't recompute the timeout |
| 1508 | * everytime we get here, otherwise it would risk never to expire. We only |
| 1509 | * update it if is was not yet set. The stream socket handler will already |
| 1510 | * have updated it if there has been a completed I/O. |
| 1511 | */ |
| 1512 | si->flags &= ~SI_FL_WAIT_DATA; |
| 1513 | if (!tick_isset(oc->wex)) { |
| 1514 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
| 1515 | if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
| 1516 | /* Note: depending on the protocol, we don't know if we're waiting |
| 1517 | * for incoming data or not. So in order to prevent the socket from |
| 1518 | * expiring read timeouts during writes, we refresh the read timeout, |
| 1519 | * except if it was already infinite or if we have explicitly setup |
| 1520 | * independent streams. |
| 1521 | */ |
| 1522 | ic->rex = tick_add_ifset(now_ms, ic->rto); |
| 1523 | } |
| 1524 | } |
| 1525 | } |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1526 | } |
Willy Tarreau | 563cc37 | 2015-04-19 18:13:56 +0200 | [diff] [blame] | 1527 | |
Willy Tarreau | fe12793 | 2015-04-21 19:23:39 +0200 | [diff] [blame] | 1528 | if (((si->flags & (SI_FL_WANT_PUT|SI_FL_WAIT_ROOM)) == SI_FL_WANT_PUT) || |
| 1529 | ((si->flags & (SI_FL_WANT_GET|SI_FL_WAIT_DATA)) == SI_FL_WANT_GET)) |
Willy Tarreau | 563cc37 | 2015-04-19 18:13:56 +0200 | [diff] [blame] | 1530 | appctx_wakeup(si_appctx(si)); |
Willy Tarreau | fe12793 | 2015-04-21 19:23:39 +0200 | [diff] [blame] | 1531 | else |
| 1532 | appctx_pause(si_appctx(si)); |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1533 | } |
| 1534 | |
| 1535 | /* |
| 1536 | * This function performs a shutdown-read on a stream interface attached to an |
| 1537 | * applet in a connected or init state (it does nothing for other states). It |
| 1538 | * either shuts the read side or marks itself as closed. The buffer flags are |
| 1539 | * updated to reflect the new state. If the stream interface has SI_FL_NOHALF, |
| 1540 | * we also forward the close to the write side. The owner task is woken up if |
| 1541 | * it exists. |
| 1542 | */ |
| 1543 | static void stream_int_shutr_applet(struct stream_interface *si) |
| 1544 | { |
| 1545 | struct channel *ic = si_ic(si); |
| 1546 | |
| 1547 | ic->flags &= ~CF_SHUTR_NOW; |
| 1548 | if (ic->flags & CF_SHUTR) |
| 1549 | return; |
| 1550 | ic->flags |= CF_SHUTR; |
| 1551 | ic->rex = TICK_ETERNITY; |
| 1552 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 1553 | |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1554 | /* Note: on shutr, we don't call the applet */ |
| 1555 | |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1556 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
| 1557 | return; |
| 1558 | |
| 1559 | if (si_oc(si)->flags & CF_SHUTW) { |
| 1560 | si->state = SI_ST_DIS; |
| 1561 | si->exp = TICK_ETERNITY; |
| 1562 | si_applet_release(si); |
| 1563 | } |
| 1564 | else if (si->flags & SI_FL_NOHALF) { |
| 1565 | /* we want to immediately forward this close to the write side */ |
| 1566 | return stream_int_shutw_applet(si); |
| 1567 | } |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1568 | } |
| 1569 | |
| 1570 | /* |
| 1571 | * This function performs a shutdown-write on a stream interface attached to an |
| 1572 | * applet in a connected or init state (it does nothing for other states). It |
| 1573 | * either shuts the write side or marks itself as closed. The buffer flags are |
| 1574 | * updated to reflect the new state. It does also close everything if the SI |
| 1575 | * was marked as being in error state. The owner task is woken up if it exists. |
| 1576 | */ |
| 1577 | static void stream_int_shutw_applet(struct stream_interface *si) |
| 1578 | { |
| 1579 | struct channel *ic = si_ic(si); |
| 1580 | struct channel *oc = si_oc(si); |
| 1581 | |
| 1582 | oc->flags &= ~CF_SHUTW_NOW; |
| 1583 | if (oc->flags & CF_SHUTW) |
| 1584 | return; |
| 1585 | oc->flags |= CF_SHUTW; |
| 1586 | oc->wex = TICK_ETERNITY; |
| 1587 | si->flags &= ~SI_FL_WAIT_DATA; |
| 1588 | |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1589 | /* on shutw we always wake the applet up */ |
| 1590 | appctx_wakeup(si_appctx(si)); |
| 1591 | |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1592 | switch (si->state) { |
| 1593 | case SI_ST_EST: |
| 1594 | /* we have to shut before closing, otherwise some short messages |
| 1595 | * may never leave the system, especially when there are remaining |
| 1596 | * unread data in the socket input buffer, or when nolinger is set. |
| 1597 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 1598 | * no risk so we close both sides immediately. |
| 1599 | */ |
| 1600 | if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) && |
| 1601 | !(ic->flags & (CF_SHUTR|CF_DONT_READ))) |
| 1602 | return; |
| 1603 | |
| 1604 | /* fall through */ |
| 1605 | case SI_ST_CON: |
| 1606 | case SI_ST_CER: |
| 1607 | case SI_ST_QUE: |
| 1608 | case SI_ST_TAR: |
| 1609 | /* Note that none of these states may happen with applets */ |
| 1610 | si->state = SI_ST_DIS; |
| 1611 | si_applet_release(si); |
| 1612 | default: |
| 1613 | si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER); |
| 1614 | ic->flags &= ~CF_SHUTR_NOW; |
| 1615 | ic->flags |= CF_SHUTR; |
| 1616 | ic->rex = TICK_ETERNITY; |
| 1617 | si->exp = TICK_ETERNITY; |
| 1618 | } |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1619 | } |
| 1620 | |
| 1621 | /* chk_rcv function for applets */ |
| 1622 | static void stream_int_chk_rcv_applet(struct stream_interface *si) |
| 1623 | { |
| 1624 | struct channel *ic = si_ic(si); |
| 1625 | |
| 1626 | DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n", |
| 1627 | __FUNCTION__, |
| 1628 | si, si->state, ic->flags, si_oc(si)->flags); |
| 1629 | |
| 1630 | if (unlikely(si->state != SI_ST_EST || (ic->flags & (CF_SHUTR|CF_DONT_READ)))) |
| 1631 | return; |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1632 | /* here we only wake the applet up if it was waiting for some room */ |
| 1633 | if (!(si->flags & SI_FL_WAIT_ROOM)) |
| 1634 | return; |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1635 | |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1636 | if (channel_may_recv(ic) && !ic->pipe) { |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1637 | /* (re)start reading */ |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1638 | appctx_wakeup(si_appctx(si)); |
| 1639 | } |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1640 | } |
| 1641 | |
| 1642 | /* chk_snd function for applets */ |
| 1643 | static void stream_int_chk_snd_applet(struct stream_interface *si) |
| 1644 | { |
| 1645 | struct channel *oc = si_oc(si); |
| 1646 | |
| 1647 | DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n", |
| 1648 | __FUNCTION__, |
| 1649 | si, si->state, si_ic(si)->flags, oc->flags); |
| 1650 | |
| 1651 | if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW))) |
| 1652 | return; |
| 1653 | |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1654 | /* we only wake the applet up if it was waiting for some data */ |
| 1655 | |
| 1656 | if (!(si->flags & SI_FL_WAIT_DATA)) |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1657 | return; |
| 1658 | |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1659 | if (!tick_isset(oc->wex)) |
| 1660 | oc->wex = tick_add_ifset(now_ms, oc->wto); |
| 1661 | |
Willy Tarreau | 828824a | 2015-04-19 17:20:03 +0200 | [diff] [blame] | 1662 | if (!channel_is_empty(oc)) { |
| 1663 | /* (re)start sending */ |
| 1664 | appctx_wakeup(si_appctx(si)); |
| 1665 | } |
Willy Tarreau | d45b9f8 | 2015-04-13 16:30:14 +0200 | [diff] [blame] | 1666 | } |
| 1667 | |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 1668 | /* |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 1669 | * Local variables: |
| 1670 | * c-indent-level: 8 |
| 1671 | * c-basic-offset: 8 |
| 1672 | * End: |
| 1673 | */ |