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 | c7e4238 | 2012-08-24 19:22:53 +0200 | [diff] [blame] | 30 | #include <proto/channel.h> |
Willy Tarreau | 8b11708 | 2012-08-06 15:06:49 +0200 | [diff] [blame] | 31 | #include <proto/connection.h> |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 32 | #include <proto/fd.h> |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 33 | #include <proto/pipe.h> |
Willy Tarreau | bf883e0 | 2014-11-25 21:10:35 +0100 | [diff] [blame] | 34 | #include <proto/session.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 | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 51 | static void si_conn_recv_cb(struct connection *conn); |
| 52 | static void si_conn_send_cb(struct connection *conn); |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 53 | static int si_conn_wake_cb(struct connection *conn); |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 54 | static int si_idle_conn_wake_cb(struct connection *conn); |
| 55 | static void si_idle_conn_null_cb(struct connection *conn); |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 56 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 57 | /* stream-interface operations for embedded tasks */ |
| 58 | struct si_ops si_embedded_ops = { |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 59 | .update = stream_int_update_embedded, |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 60 | .chk_rcv = stream_int_chk_rcv, |
| 61 | .chk_snd = stream_int_chk_snd, |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 62 | .shutr = stream_int_shutr, |
| 63 | .shutw = stream_int_shutw, |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 64 | }; |
| 65 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 66 | /* stream-interface operations for connections */ |
| 67 | struct si_ops si_conn_ops = { |
| 68 | .update = stream_int_update_conn, |
| 69 | .chk_rcv = stream_int_chk_rcv_conn, |
| 70 | .chk_snd = stream_int_chk_snd_conn, |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 71 | .shutr = stream_int_shutr_conn, |
| 72 | .shutw = stream_int_shutw_conn, |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 73 | }; |
| 74 | |
Willy Tarreau | 74beec3 | 2012-10-03 00:41:04 +0200 | [diff] [blame] | 75 | struct data_cb si_conn_cb = { |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 76 | .recv = si_conn_recv_cb, |
| 77 | .send = si_conn_send_cb, |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 78 | .wake = si_conn_wake_cb, |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 79 | }; |
| 80 | |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 81 | struct data_cb si_idle_conn_cb = { |
| 82 | .recv = si_idle_conn_null_cb, |
| 83 | .send = si_idle_conn_null_cb, |
| 84 | .wake = si_idle_conn_wake_cb, |
| 85 | }; |
| 86 | |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 87 | /* |
| 88 | * This function only has to be called once after a wakeup event in case of |
| 89 | * suspected timeout. It controls the stream interface timeouts and sets |
| 90 | * si->flags accordingly. It does NOT close anything, as this timeout may |
| 91 | * be used for any purpose. It returns 1 if the timeout fired, otherwise |
| 92 | * zero. |
| 93 | */ |
| 94 | int stream_int_check_timeouts(struct stream_interface *si) |
| 95 | { |
| 96 | if (tick_is_expired(si->exp, now_ms)) { |
| 97 | si->flags |= SI_FL_EXP; |
| 98 | return 1; |
| 99 | } |
| 100 | return 0; |
| 101 | } |
| 102 | |
Willy Tarreau | fe3718a | 2008-11-30 18:14:12 +0100 | [diff] [blame] | 103 | /* 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] | 104 | void stream_int_report_error(struct stream_interface *si) |
| 105 | { |
| 106 | if (!si->err_type) |
| 107 | si->err_type = SI_ET_DATA_ERR; |
| 108 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 109 | si->ob->flags |= CF_WRITE_ERROR; |
| 110 | si->ib->flags |= CF_READ_ERROR; |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 111 | } |
| 112 | |
| 113 | /* |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 114 | * Returns a message to the client ; the connection is shut down for read, |
| 115 | * and the request is cleared so that no server connection can be initiated. |
| 116 | * The buffer is marked for read shutdown on the other side to protect the |
| 117 | * 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] | 118 | * "chunk". If it is null, then an empty message is used. The reply buffer does |
| 119 | * not need to be empty before this, and its contents will not be overwritten. |
| 120 | * 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] | 121 | */ |
| 122 | void stream_int_retnclose(struct stream_interface *si, const struct chunk *msg) |
| 123 | { |
Willy Tarreau | 8263d2b | 2012-08-28 00:06:31 +0200 | [diff] [blame] | 124 | channel_auto_read(si->ib); |
| 125 | channel_abort(si->ib); |
| 126 | channel_auto_close(si->ib); |
| 127 | channel_erase(si->ib); |
Willy Tarreau | 798e128 | 2010-12-12 13:06:00 +0100 | [diff] [blame] | 128 | |
Willy Tarreau | 9dab5fc | 2012-05-07 11:56:55 +0200 | [diff] [blame] | 129 | bi_erase(si->ob); |
Willy Tarreau | 148d099 | 2010-01-10 10:21:21 +0100 | [diff] [blame] | 130 | if (likely(msg && msg->len)) |
Willy Tarreau | 9dab5fc | 2012-05-07 11:56:55 +0200 | [diff] [blame] | 131 | bo_inject(si->ob, msg->str, msg->len); |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 132 | |
| 133 | si->ob->wex = tick_add_ifset(now_ms, si->ob->wto); |
Willy Tarreau | 8263d2b | 2012-08-28 00:06:31 +0200 | [diff] [blame] | 134 | channel_auto_read(si->ob); |
| 135 | channel_auto_close(si->ob); |
| 136 | channel_shutr_now(si->ob); |
Willy Tarreau | 5d881d0 | 2009-12-27 22:51:06 +0100 | [diff] [blame] | 137 | } |
| 138 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 139 | /* 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] | 140 | static void stream_int_update_embedded(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 141 | { |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 142 | int old_flags = si->flags; |
| 143 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 144 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 145 | __FUNCTION__, |
| 146 | si, si->state, si->ib->flags, si->ob->flags); |
| 147 | |
| 148 | if (si->state != SI_ST_EST) |
| 149 | return; |
| 150 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 151 | if ((si->ob->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW && |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 152 | channel_is_empty(si->ob)) |
Willy Tarreau | 73b013b | 2012-05-21 16:31:45 +0200 | [diff] [blame] | 153 | si_shutw(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 154 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 155 | if ((si->ob->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0 && !channel_full(si->ob)) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 156 | si->flags |= SI_FL_WAIT_DATA; |
| 157 | |
Willy Tarreau | 96fd4b5 | 2009-10-04 17:18:35 +0200 | [diff] [blame] | 158 | /* we're almost sure that we need some space if the buffer is not |
| 159 | * empty, even if it's not full, because the applets can't fill it. |
| 160 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 161 | if ((si->ib->flags & (CF_SHUTR|CF_DONT_READ)) == 0 && !channel_is_empty(si->ib)) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 162 | si->flags |= SI_FL_WAIT_ROOM; |
| 163 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 164 | if (si->ob->flags & CF_WRITE_ACTIVITY) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 165 | if (tick_isset(si->ob->wex)) |
| 166 | si->ob->wex = tick_add_ifset(now_ms, si->ob->wto); |
| 167 | } |
| 168 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 169 | if (si->ib->flags & CF_READ_ACTIVITY || |
| 170 | (si->ob->flags & CF_WRITE_ACTIVITY && !(si->flags & SI_FL_INDEP_STR))) { |
Willy Tarreau | f27b5ea | 2009-10-03 22:01:18 +0200 | [diff] [blame] | 171 | if (tick_isset(si->ib->rex)) |
| 172 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
| 173 | } |
| 174 | |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 175 | /* save flags to detect changes */ |
| 176 | old_flags = si->flags; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 177 | if (likely((si->ob->flags & (CF_SHUTW|CF_WRITE_PARTIAL|CF_DONT_READ)) == CF_WRITE_PARTIAL && |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 178 | !channel_full(si->ob) && |
Willy Tarreau | 96fd4b5 | 2009-10-04 17:18:35 +0200 | [diff] [blame] | 179 | (si->ob->prod->flags & SI_FL_WAIT_ROOM))) |
Willy Tarreau | 73b013b | 2012-05-21 16:31:45 +0200 | [diff] [blame] | 180 | si_chk_rcv(si->ob->prod); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 181 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 182 | if (((si->ib->flags & CF_READ_PARTIAL) && !channel_is_empty(si->ib)) && |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 183 | (si->ib->cons->flags & SI_FL_WAIT_DATA)) { |
Willy Tarreau | 73b013b | 2012-05-21 16:31:45 +0200 | [diff] [blame] | 184 | si_chk_snd(si->ib->cons); |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 185 | /* check if the consumer has freed some space */ |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 186 | if (!channel_full(si->ib)) |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 187 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 188 | } |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 189 | |
| 190 | /* Note that we're trying to wake up in two conditions here : |
| 191 | * - special event, which needs the holder task attention |
| 192 | * - status indicating that the applet can go on working. This |
| 193 | * is rather hard because we might be blocking on output and |
| 194 | * 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] | 195 | * to only rely on the changes the chk_* might have performed. |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 196 | */ |
| 197 | if (/* check stream interface changes */ |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 198 | ((old_flags & ~si->flags) & (SI_FL_WAIT_ROOM|SI_FL_WAIT_DATA)) || |
| 199 | |
| 200 | /* changes on the production side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 201 | (si->ib->flags & (CF_READ_NULL|CF_READ_ERROR)) || |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 202 | si->state != SI_ST_EST || |
| 203 | (si->flags & SI_FL_ERR) || |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 204 | ((si->ib->flags & CF_READ_PARTIAL) && |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 205 | (!si->ib->to_forward || si->ib->cons->state != SI_ST_EST)) || |
| 206 | |
| 207 | /* changes on the consumption side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 208 | (si->ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) || |
| 209 | ((si->ob->flags & CF_WRITE_ACTIVITY) && |
Willy Tarreau | e6300be | 2014-01-25 02:33:21 +0100 | [diff] [blame] | 210 | ((si->ob->flags & CF_SHUTW) || |
| 211 | ((si->ob->flags & CF_WAKE_WRITE) && |
| 212 | (si->ob->prod->state != SI_ST_EST || |
| 213 | (channel_is_empty(si->ob) && !si->ob->to_forward)))))) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 214 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 215 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 216 | } |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 217 | if (si->ib->flags & CF_READ_ACTIVITY) |
| 218 | si->ib->flags &= ~CF_READ_DONTWAIT; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 219 | } |
| 220 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 221 | /* |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 222 | * This function performs a shutdown-read on a stream interface attached to an |
| 223 | * applet in a connected or init state (it does nothing for other states). It |
| 224 | * either shuts the read side or marks itself as closed. The buffer flags are |
| 225 | * updated to reflect the new state. If the stream interface has SI_FL_NOHALF, |
| 226 | * we also forward the close to the write side. The owner task is woken up if |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 227 | * it exists. |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 228 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 229 | static void stream_int_shutr(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 230 | { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 231 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 232 | if (si->ib->flags & CF_SHUTR) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 233 | return; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 234 | si->ib->flags |= CF_SHUTR; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 235 | si->ib->rex = TICK_ETERNITY; |
| 236 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 237 | |
| 238 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 239 | return; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 240 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 241 | if (si->ob->flags & CF_SHUTW) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 242 | si->state = SI_ST_DIS; |
| 243 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 4a59f2f | 2013-10-24 20:10:45 +0200 | [diff] [blame] | 244 | si_applet_release(si); |
Willy Tarreau | d8ccffe | 2010-09-07 16:16:50 +0200 | [diff] [blame] | 245 | } |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 246 | else if (si->flags & SI_FL_NOHALF) { |
| 247 | /* we want to immediately forward this close to the write side */ |
| 248 | return stream_int_shutw(si); |
| 249 | } |
Willy Tarreau | 0bd05ea | 2010-07-02 11:18:03 +0200 | [diff] [blame] | 250 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 251 | /* note that if the task exists, it must unregister itself once it runs */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 252 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 253 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 254 | } |
| 255 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 256 | /* |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 257 | * This function performs a shutdown-write on a stream interface attached to an |
| 258 | * applet in a connected or init state (it does nothing for other states). It |
| 259 | * either shuts the write side or marks itself as closed. The buffer flags are |
| 260 | * updated to reflect the new state. It does also close everything if the SI |
| 261 | * was marked as 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] | 262 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 263 | static void stream_int_shutw(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 264 | { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 265 | si->ob->flags &= ~CF_SHUTW_NOW; |
| 266 | if (si->ob->flags & CF_SHUTW) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 267 | return; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 268 | si->ob->flags |= CF_SHUTW; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 269 | si->ob->wex = TICK_ETERNITY; |
| 270 | si->flags &= ~SI_FL_WAIT_DATA; |
| 271 | |
| 272 | switch (si->state) { |
| 273 | case SI_ST_EST: |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 274 | /* we have to shut before closing, otherwise some short messages |
| 275 | * may never leave the system, especially when there are remaining |
| 276 | * unread data in the socket input buffer, or when nolinger is set. |
| 277 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 278 | * no risk so we close both sides immediately. |
| 279 | */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 280 | if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) && |
| 281 | !(si->ib->flags & (CF_SHUTR|CF_DONT_READ))) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 282 | return; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 283 | |
| 284 | /* fall through */ |
| 285 | case SI_ST_CON: |
| 286 | case SI_ST_CER: |
Willy Tarreau | 32d3ee9 | 2010-12-29 14:03:02 +0100 | [diff] [blame] | 287 | case SI_ST_QUE: |
| 288 | case SI_ST_TAR: |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 289 | /* Note that none of these states may happen with applets */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 290 | si->state = SI_ST_DIS; |
Willy Tarreau | 4a59f2f | 2013-10-24 20:10:45 +0200 | [diff] [blame] | 291 | si_applet_release(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 292 | default: |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 293 | si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER); |
| 294 | si->ib->flags &= ~CF_SHUTR_NOW; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 295 | si->ib->flags |= CF_SHUTR; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 296 | si->ib->rex = TICK_ETERNITY; |
| 297 | si->exp = TICK_ETERNITY; |
| 298 | } |
| 299 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 300 | /* note that if the task exists, it must unregister itself once it runs */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 301 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 302 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 303 | } |
| 304 | |
| 305 | /* default chk_rcv function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 306 | static void stream_int_chk_rcv(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 307 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 308 | struct channel *ib = si->ib; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 309 | |
| 310 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 311 | __FUNCTION__, |
| 312 | si, si->state, si->ib->flags, si->ob->flags); |
| 313 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 314 | if (unlikely(si->state != SI_ST_EST || (ib->flags & (CF_SHUTR|CF_DONT_READ)))) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 315 | return; |
| 316 | |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 317 | if (channel_full(ib)) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 318 | /* stop reading */ |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 319 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 320 | } |
| 321 | else { |
| 322 | /* (re)start reading */ |
| 323 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 324 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 325 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 326 | } |
| 327 | } |
| 328 | |
| 329 | /* default chk_snd function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 330 | static void stream_int_chk_snd(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 331 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 332 | struct channel *ob = si->ob; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 333 | |
| 334 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 335 | __FUNCTION__, |
| 336 | si, si->state, si->ib->flags, si->ob->flags); |
| 337 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 338 | if (unlikely(si->state != SI_ST_EST || (si->ob->flags & CF_SHUTW))) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 339 | return; |
| 340 | |
| 341 | if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 342 | channel_is_empty(ob)) /* called with nothing to send ! */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 343 | return; |
| 344 | |
| 345 | /* Otherwise there are remaining data to be sent in the buffer, |
| 346 | * so we tell the handler. |
| 347 | */ |
| 348 | si->flags &= ~SI_FL_WAIT_DATA; |
| 349 | if (!tick_isset(ob->wex)) |
| 350 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 351 | |
| 352 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 353 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 354 | } |
| 355 | |
Willy Tarreau | 1fbe1c9 | 2013-12-01 09:35:41 +0100 | [diff] [blame] | 356 | /* Register an applet to handle a stream_interface as part of the |
| 357 | * stream interface's owner task. The SI will wake it up everytime it |
| 358 | * is solicited. The task's processing function must call the applet's |
| 359 | * function before returning. It must be deleted by the task handler |
| 360 | * using stream_int_unregister_handler(), possibly from within the |
| 361 | * function itself. It also pre-initializes the applet's context and |
| 362 | * returns it (or NULL in case it could not be allocated). |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 363 | */ |
Willy Tarreau | 1fbe1c9 | 2013-12-01 09:35:41 +0100 | [diff] [blame] | 364 | struct appctx *stream_int_register_handler(struct stream_interface *si, struct si_applet *app) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 365 | { |
Willy Tarreau | 0a23bcb | 2013-12-01 11:31:38 +0100 | [diff] [blame] | 366 | struct appctx *appctx; |
| 367 | |
Simon Horman | 7abd00d | 2011-08-13 08:03:51 +0900 | [diff] [blame] | 368 | DPRINTF(stderr, "registering handler %p for si %p (was %p)\n", app, si, si->owner); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 369 | |
Willy Tarreau | 0a23bcb | 2013-12-01 11:31:38 +0100 | [diff] [blame] | 370 | appctx = si_alloc_appctx(si); |
Willy Tarreau | a69fc9f | 2014-12-22 19:34:00 +0100 | [diff] [blame] | 371 | if (!appctx) |
Willy Tarreau | 0a23bcb | 2013-12-01 11:31:38 +0100 | [diff] [blame] | 372 | return NULL; |
| 373 | |
| 374 | appctx_set_applet(appctx, app); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 375 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | 1fbe1c9 | 2013-12-01 09:35:41 +0100 | [diff] [blame] | 376 | return si_appctx(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 377 | } |
| 378 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 379 | /* 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] | 380 | * 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] | 381 | */ |
| 382 | void stream_int_unregister_handler(struct stream_interface *si) |
| 383 | { |
Willy Tarreau | 32e3c6a | 2013-10-11 19:34:20 +0200 | [diff] [blame] | 384 | si_detach(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 385 | } |
| 386 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 387 | /* 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] | 388 | * established. It returns 0 if it fails in a fatal way or needs to poll to go |
| 389 | * 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] | 390 | * flags (the bit is provided in <flag> by the caller). It is designed to be |
| 391 | * 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] | 392 | * Note that it can emit a PROXY line by relying on the other end's address |
| 393 | * when the connection is attached to a stream interface, or by resolving the |
| 394 | * local address otherwise (also called a LOCAL line). |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 395 | */ |
| 396 | int conn_si_send_proxy(struct connection *conn, unsigned int flag) |
| 397 | { |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 398 | /* we might have been called just after an asynchronous shutw */ |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 399 | if (conn->flags & CO_FL_SOCK_WR_SH) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 400 | goto out_error; |
| 401 | |
Willy Tarreau | d02cdd2 | 2013-12-15 10:23:20 +0100 | [diff] [blame] | 402 | if (!conn_ctrl_ready(conn)) |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 403 | goto out_error; |
| 404 | |
Willy Tarreau | fd803bb | 2014-01-20 15:13:07 +0100 | [diff] [blame] | 405 | if (!fd_send_ready(conn->t.sock.fd)) |
| 406 | goto out_wait; |
| 407 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 408 | /* If we have a PROXY line to send, we'll use this to validate the |
| 409 | * connection, in which case the connection is validated only once |
| 410 | * we've sent the whole proxy line. Otherwise we use connect(). |
| 411 | */ |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 412 | while (conn->send_proxy_ofs) { |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 413 | int ret; |
| 414 | |
| 415 | /* The target server expects a PROXY line to be sent first. |
| 416 | * If the send_proxy_ofs is negative, it corresponds to the |
| 417 | * offset to start sending from then end of the proxy string |
| 418 | * (which is recomputed every time since it's constant). If |
| 419 | * it is positive, it means we have to send from the start. |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 420 | * We can only send a "normal" PROXY line when the connection |
| 421 | * is attached to a stream interface. Otherwise we can only |
| 422 | * send a LOCAL line (eg: for use with health checks). |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 423 | */ |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 424 | if (conn->data == &si_conn_cb) { |
| 425 | struct stream_interface *si = conn->owner; |
| 426 | struct connection *remote = objt_conn(si->ob->prod->end); |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 427 | 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] | 428 | } |
| 429 | else { |
| 430 | /* The target server expects a LOCAL line to be sent first. Retrieving |
| 431 | * local or remote addresses may fail until the connection is established. |
| 432 | */ |
| 433 | conn_get_from_addr(conn); |
| 434 | if (!(conn->flags & CO_FL_ADDR_FROM_SET)) |
| 435 | goto out_wait; |
| 436 | |
| 437 | conn_get_to_addr(conn); |
| 438 | if (!(conn->flags & CO_FL_ADDR_TO_SET)) |
| 439 | goto out_wait; |
| 440 | |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 441 | 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] | 442 | } |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 443 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 444 | if (!ret) |
| 445 | goto out_error; |
| 446 | |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 447 | if (conn->send_proxy_ofs > 0) |
| 448 | conn->send_proxy_ofs = -ret; /* first call */ |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 449 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 450 | /* we have to send trash from (ret+sp for -sp bytes). If the |
| 451 | * data layer has a pending write, we'll also set MSG_MORE. |
| 452 | */ |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 453 | ret = send(conn->t.sock.fd, trash.str + ret + conn->send_proxy_ofs, -conn->send_proxy_ofs, |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 454 | (conn->flags & CO_FL_DATA_WR_ENA) ? MSG_MORE : 0); |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 455 | |
| 456 | if (ret == 0) |
| 457 | goto out_wait; |
| 458 | |
| 459 | if (ret < 0) { |
Willy Tarreau | 95742a4 | 2013-09-03 09:02:11 +0200 | [diff] [blame] | 460 | if (errno == EAGAIN || errno == ENOTCONN) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 461 | goto out_wait; |
Willy Tarreau | 7fe4569 | 2013-12-04 23:37:56 +0100 | [diff] [blame] | 462 | if (errno == EINTR) |
| 463 | continue; |
Willy Tarreau | 26f4a04 | 2013-12-04 23:44:10 +0100 | [diff] [blame] | 464 | conn->flags |= CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 465 | goto out_error; |
| 466 | } |
| 467 | |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 468 | conn->send_proxy_ofs += ret; /* becomes zero once complete */ |
| 469 | if (conn->send_proxy_ofs != 0) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 470 | goto out_wait; |
| 471 | |
| 472 | /* OK we've sent the whole line, we're connected */ |
Willy Tarreau | 7fe4569 | 2013-12-04 23:37:56 +0100 | [diff] [blame] | 473 | break; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 474 | } |
| 475 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 476 | /* The connection is ready now, simply return and let the connection |
| 477 | * handler notify upper layers if needed. |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 478 | */ |
| 479 | if (conn->flags & CO_FL_WAIT_L4_CONN) |
| 480 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 481 | conn->flags &= ~flag; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 482 | return 1; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 483 | |
| 484 | out_error: |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 485 | /* Write error on the file descriptor */ |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 486 | conn->flags |= CO_FL_ERROR; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 487 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 488 | |
| 489 | out_wait: |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 490 | __conn_sock_stop_recv(conn); |
Willy Tarreau | e1f50c4 | 2014-01-22 20:02:06 +0100 | [diff] [blame] | 491 | fd_cant_send(conn->t.sock.fd); |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 492 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 493 | } |
| 494 | |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 495 | |
| 496 | /* Tiny I/O callback called on recv/send I/O events on idle connections. |
| 497 | * It simply sets the CO_FL_SOCK_RD_SH flag so that si_idle_conn_wake_cb() |
| 498 | * is notified and can kill the connection. |
| 499 | */ |
| 500 | static void si_idle_conn_null_cb(struct connection *conn) |
| 501 | { |
| 502 | if (conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH)) |
| 503 | return; |
| 504 | |
Willy Tarreau | 46be2e5 | 2014-01-20 12:10:52 +0100 | [diff] [blame] | 505 | if (fdtab[conn->t.sock.fd].ev & (FD_POLL_ERR|FD_POLL_HUP)) { |
| 506 | fdtab[conn->t.sock.fd].linger_risk = 0; |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 507 | conn->flags |= CO_FL_SOCK_RD_SH; |
Willy Tarreau | 46be2e5 | 2014-01-20 12:10:52 +0100 | [diff] [blame] | 508 | } |
| 509 | else { |
| 510 | conn_drain(conn); |
| 511 | } |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 512 | |
| 513 | /* disable draining if we were called and have no drain function */ |
| 514 | if (!conn->ctrl->drain) |
| 515 | __conn_data_stop_recv(conn); |
| 516 | } |
| 517 | |
| 518 | /* Callback to be used by connection I/O handlers when some activity is detected |
| 519 | * on an idle server connection. Its main purpose is to kill the connection once |
| 520 | * a close was detected on it. It returns 0 if it did nothing serious, or -1 if |
| 521 | * it killed the connection. |
| 522 | */ |
| 523 | static int si_idle_conn_wake_cb(struct connection *conn) |
| 524 | { |
| 525 | struct stream_interface *si = conn->owner; |
| 526 | |
| 527 | if (!conn_ctrl_ready(conn)) |
| 528 | return 0; |
| 529 | |
| 530 | if (conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH)) { |
| 531 | /* warning, we can't do anything on <conn> after this call ! */ |
| 532 | conn_force_close(conn); |
| 533 | conn_free(conn); |
| 534 | si->end = NULL; |
| 535 | return -1; |
| 536 | } |
| 537 | return 0; |
| 538 | } |
| 539 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 540 | /* 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] | 541 | * 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] | 542 | * 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] | 543 | * an important event requires special handling. It relies on the connection handler |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 544 | * to commit any polling updates. The function always returns 0. |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 545 | */ |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 546 | static int si_conn_wake_cb(struct connection *conn) |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 547 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 548 | struct stream_interface *si = conn->owner; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 549 | |
| 550 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 551 | __FUNCTION__, |
| 552 | si, si->state, si->ib->flags, si->ob->flags); |
| 553 | |
Willy Tarreau | 3c55ec2 | 2012-07-23 19:19:51 +0200 | [diff] [blame] | 554 | if (conn->flags & CO_FL_ERROR) |
| 555 | si->flags |= SI_FL_ERR; |
| 556 | |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 557 | /* check for recent connection establishment */ |
Willy Tarreau | c76ae33 | 2012-07-12 15:32:13 +0200 | [diff] [blame] | 558 | 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] | 559 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 560 | si->ob->flags |= CF_WRITE_NULL; |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 561 | } |
| 562 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 563 | /* process consumer side */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 564 | if (channel_is_empty(si->ob)) { |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 565 | if (((si->ob->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 566 | (si->state == SI_ST_EST)) |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 567 | stream_int_shutw_conn(si); |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 568 | __conn_data_stop_send(conn); |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 569 | si->ob->wex = TICK_ETERNITY; |
| 570 | } |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 571 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 572 | if ((si->ob->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0 && !channel_full(si->ob)) |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 573 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 574 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 575 | if (si->ob->flags & CF_WRITE_ACTIVITY) { |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 576 | /* update timeouts if we have written something */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 577 | if ((si->ob->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 578 | !channel_is_empty(si->ob)) |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 579 | if (tick_isset(si->ob->wex)) |
| 580 | si->ob->wex = tick_add_ifset(now_ms, si->ob->wto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 581 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 582 | if (!(si->flags & SI_FL_INDEP_STR)) |
| 583 | if (tick_isset(si->ib->rex)) |
| 584 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 585 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 586 | if (likely((si->ob->flags & (CF_SHUTW|CF_WRITE_PARTIAL|CF_DONT_READ)) == CF_WRITE_PARTIAL && |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 587 | !channel_full(si->ob) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 588 | (si->ob->prod->flags & SI_FL_WAIT_ROOM))) |
| 589 | si_chk_rcv(si->ob->prod); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 590 | } |
| 591 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 592 | /* process producer side. |
| 593 | * We might have some data the consumer is waiting for. |
| 594 | * We can do fast-forwarding, but we avoid doing this for partial |
| 595 | * buffers, because it is very likely that it will be done again |
| 596 | * immediately afterwards once the following data is parsed (eg: |
| 597 | * HTTP chunking). |
| 598 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 599 | if (((si->ib->flags & CF_READ_PARTIAL) && !channel_is_empty(si->ib)) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 600 | (si->ib->pipe /* always try to send spliced data */ || |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 601 | (si->ib->buf->i == 0 && (si->ib->cons->flags & SI_FL_WAIT_DATA)))) { |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 602 | int last_len = si->ib->pipe ? si->ib->pipe->data : 0; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 603 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 604 | si_chk_snd(si->ib->cons); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 605 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 606 | /* check if the consumer has freed some space either in the |
| 607 | * buffer or in the pipe. |
| 608 | */ |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 609 | if (!channel_full(si->ib) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 610 | (!last_len || !si->ib->pipe || si->ib->pipe->data < last_len)) |
| 611 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 612 | } |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 613 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 614 | if (si->flags & SI_FL_WAIT_ROOM) { |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 615 | __conn_data_stop_recv(conn); |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 616 | si->ib->rex = TICK_ETERNITY; |
| 617 | } |
Willy Tarreau | 6657276 | 2012-12-19 17:34:17 +0100 | [diff] [blame] | 618 | else if ((si->ib->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ)) == CF_READ_PARTIAL && |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 619 | !channel_full(si->ib)) { |
Willy Tarreau | 9f7c6a1 | 2012-11-19 16:43:14 +0100 | [diff] [blame] | 620 | /* we must re-enable reading if si_chk_snd() has freed some space */ |
| 621 | __conn_data_want_recv(conn); |
Willy Tarreau | 6657276 | 2012-12-19 17:34:17 +0100 | [diff] [blame] | 622 | if (!(si->ib->flags & CF_READ_NOEXP) && tick_isset(si->ib->rex)) |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 623 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 624 | } |
| 625 | |
| 626 | /* wake the task up only when needed */ |
| 627 | if (/* changes on the production side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 628 | (si->ib->flags & (CF_READ_NULL|CF_READ_ERROR)) || |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 629 | si->state != SI_ST_EST || |
| 630 | (si->flags & SI_FL_ERR) || |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 631 | ((si->ib->flags & CF_READ_PARTIAL) && |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 632 | (!si->ib->to_forward || si->ib->cons->state != SI_ST_EST)) || |
| 633 | |
| 634 | /* changes on the consumption side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 635 | (si->ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) || |
| 636 | ((si->ob->flags & CF_WRITE_ACTIVITY) && |
Willy Tarreau | e6300be | 2014-01-25 02:33:21 +0100 | [diff] [blame] | 637 | ((si->ob->flags & CF_SHUTW) || |
| 638 | ((si->ob->flags & CF_WAKE_WRITE) && |
| 639 | (si->ob->prod->state != SI_ST_EST || |
| 640 | (channel_is_empty(si->ob) && !si->ob->to_forward)))))) { |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 641 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 642 | } |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 643 | if (si->ib->flags & CF_READ_ACTIVITY) |
| 644 | si->ib->flags &= ~CF_READ_DONTWAIT; |
Willy Tarreau | 10fc09e | 2014-11-25 19:46:36 +0100 | [diff] [blame] | 645 | |
| 646 | session_release_buffers(si_sess(si)); |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 647 | return 0; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 648 | } |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 649 | |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 650 | /* |
| 651 | * This function is called to send buffer data to a stream socket. |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 652 | * It calls the transport layer's snd_buf function. It relies on the |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 653 | * caller to commit polling changes. The caller should check conn->flags |
| 654 | * for errors. |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 655 | */ |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 656 | static void si_conn_send(struct connection *conn) |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 657 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 658 | struct stream_interface *si = conn->owner; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 659 | struct channel *chn = si->ob; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 660 | int ret; |
| 661 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 662 | if (chn->pipe && conn->xprt->snd_pipe) { |
| 663 | ret = conn->xprt->snd_pipe(conn, chn->pipe); |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 664 | if (ret > 0) |
Willy Tarreau | 9dc1c61 | 2014-09-01 20:35:55 +0200 | [diff] [blame] | 665 | chn->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 666 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 667 | if (!chn->pipe->data) { |
| 668 | put_pipe(chn->pipe); |
| 669 | chn->pipe = NULL; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 670 | } |
| 671 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 672 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 673 | return; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 674 | } |
| 675 | |
| 676 | /* At this point, the pipe is empty, but we may still have data pending |
| 677 | * in the normal buffer. |
| 678 | */ |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 679 | if (!chn->buf->o) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 680 | return; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 681 | |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 682 | /* when we're here, we already know that there is no spliced |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 683 | * data left, and that there are sendable buffered data. |
| 684 | */ |
Willy Tarreau | 310987a | 2014-01-22 19:46:33 +0100 | [diff] [blame] | 685 | 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] | 686 | /* check if we want to inform the kernel that we're interested in |
| 687 | * sending more data after this call. We want this if : |
| 688 | * - we're about to close after this last send and want to merge |
| 689 | * the ongoing FIN with the last segment. |
| 690 | * - we know we can't send everything at once and must get back |
| 691 | * here because of unaligned data |
| 692 | * - there is still a finite amount of data to forward |
| 693 | * The test is arranged so that the most common case does only 2 |
| 694 | * tests. |
| 695 | */ |
Willy Tarreau | 1049b1f | 2014-02-02 01:51:17 +0100 | [diff] [blame] | 696 | unsigned int send_flag = 0; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 697 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 698 | if ((!(chn->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) && |
| 699 | ((chn->to_forward && chn->to_forward != CHN_INFINITE_FORWARD) || |
| 700 | (chn->flags & CF_EXPECT_MORE))) || |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 701 | ((chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW)) |
Willy Tarreau | 1049b1f | 2014-02-02 01:51:17 +0100 | [diff] [blame] | 702 | send_flag |= CO_SFL_MSG_MORE; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 703 | |
Willy Tarreau | 7bed945 | 2014-02-02 02:00:24 +0100 | [diff] [blame] | 704 | if (chn->flags & CF_STREAMER) |
| 705 | send_flag |= CO_SFL_STREAMER; |
| 706 | |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 707 | ret = conn->xprt->snd_buf(conn, chn->buf, send_flag); |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 708 | if (ret > 0) { |
Willy Tarreau | 9dc1c61 | 2014-09-01 20:35:55 +0200 | [diff] [blame] | 709 | chn->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 710 | |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 711 | if (!chn->buf->o) { |
| 712 | /* Always clear both flags once everything has been sent, they're one-shot */ |
| 713 | chn->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT); |
| 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 | /* if some data remain in the buffer, it's only because the |
| 717 | * system buffers are full, we will try next time. |
| 718 | */ |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 719 | } |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 720 | } |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 721 | |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 722 | return; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 723 | } |
| 724 | |
| 725 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 726 | /* Updates the timers and flags of a stream interface attached to a connection, |
| 727 | * depending on the buffers' flags. It should only be called once after the |
| 728 | * buffer flags have settled down, and before they are cleared. It doesn't |
| 729 | * harm to call it as often as desired (it just slightly hurts performance). |
| 730 | * It is only meant to be called by upper layers after buffer flags have been |
| 731 | * manipulated by analysers. |
| 732 | */ |
| 733 | void stream_int_update_conn(struct stream_interface *si) |
| 734 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 735 | struct channel *ib = si->ib; |
| 736 | struct channel *ob = si->ob; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 737 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 738 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 739 | /* Check if we need to close the read side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 740 | if (!(ib->flags & CF_SHUTR)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 741 | /* Read not closed, update FD status and timeout for reads */ |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 742 | if ((ib->flags & CF_DONT_READ) || channel_full(ib)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 743 | /* stop reading */ |
| 744 | if (!(si->flags & SI_FL_WAIT_ROOM)) { |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 745 | if (!(ib->flags & CF_DONT_READ)) /* full */ |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 746 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 747 | conn_data_stop_recv(conn); |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 748 | ib->rex = TICK_ETERNITY; |
| 749 | } |
| 750 | } |
| 751 | else { |
| 752 | /* (re)start reading and update timeout. Note: we don't recompute the timeout |
| 753 | * everytime we get here, otherwise it would risk never to expire. We only |
| 754 | * update it if is was not yet set. The stream socket handler will already |
| 755 | * have updated it if there has been a completed I/O. |
| 756 | */ |
| 757 | si->flags &= ~SI_FL_WAIT_ROOM; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 758 | conn_data_want_recv(conn); |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 759 | if (!(ib->flags & (CF_READ_NOEXP|CF_DONT_READ)) && !tick_isset(ib->rex)) |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 760 | ib->rex = tick_add_ifset(now_ms, ib->rto); |
| 761 | } |
| 762 | } |
| 763 | |
| 764 | /* Check if we need to close the write side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 765 | if (!(ob->flags & CF_SHUTW)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 766 | /* Write not closed, update FD status and timeout for writes */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 767 | if (channel_is_empty(ob)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 768 | /* stop writing */ |
| 769 | if (!(si->flags & SI_FL_WAIT_DATA)) { |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 770 | if ((ob->flags & CF_SHUTW_NOW) == 0) |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 771 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 772 | conn_data_stop_send(conn); |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 773 | ob->wex = TICK_ETERNITY; |
| 774 | } |
| 775 | } |
| 776 | else { |
| 777 | /* (re)start writing and update timeout. Note: we don't recompute the timeout |
| 778 | * everytime we get here, otherwise it would risk never to expire. We only |
| 779 | * update it if is was not yet set. The stream socket handler will already |
| 780 | * have updated it if there has been a completed I/O. |
| 781 | */ |
| 782 | si->flags &= ~SI_FL_WAIT_DATA; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 783 | conn_data_want_send(conn); |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 784 | if (!tick_isset(ob->wex)) { |
| 785 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 786 | if (tick_isset(ib->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
| 787 | /* Note: depending on the protocol, we don't know if we're waiting |
| 788 | * for incoming data or not. So in order to prevent the socket from |
| 789 | * expiring read timeouts during writes, we refresh the read timeout, |
| 790 | * except if it was already infinite or if we have explicitly setup |
| 791 | * independent streams. |
| 792 | */ |
| 793 | ib->rex = tick_add_ifset(now_ms, ib->rto); |
| 794 | } |
| 795 | } |
| 796 | } |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 797 | } |
| 798 | } |
| 799 | |
| 800 | /* |
| 801 | * This function performs a shutdown-read on a stream interface attached to |
| 802 | * a connection in a connected or init state (it does nothing for other |
| 803 | * states). It either shuts the read side or marks itself as closed. The buffer |
| 804 | * flags are updated to reflect the new state. If the stream interface has |
| 805 | * SI_FL_NOHALF, we also forward the close to the write side. If a control |
| 806 | * 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] | 807 | * descriptors are then shutdown or closed accordingly. The function |
| 808 | * automatically disables polling if needed. |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 809 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 810 | static void stream_int_shutr_conn(struct stream_interface *si) |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 811 | { |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 812 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 813 | |
| 814 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 815 | if (si->ib->flags & CF_SHUTR) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 816 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 817 | si->ib->flags |= CF_SHUTR; |
| 818 | si->ib->rex = TICK_ETERNITY; |
| 819 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 820 | |
| 821 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 822 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 823 | |
| 824 | if (si->ob->flags & CF_SHUTW) { |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 825 | conn_full_close(conn); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 826 | si->state = SI_ST_DIS; |
| 827 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 828 | } |
| 829 | else if (si->flags & SI_FL_NOHALF) { |
| 830 | /* we want to immediately forward this close to the write side */ |
| 831 | return stream_int_shutw_conn(si); |
| 832 | } |
| 833 | else if (conn->ctrl) { |
| 834 | /* we want the caller to disable polling on this FD */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 835 | conn_data_stop_recv(conn); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 836 | } |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 837 | } |
| 838 | |
| 839 | /* |
| 840 | * This function performs a shutdown-write on a stream interface attached to |
| 841 | * a connection in a connected or init state (it does nothing for other |
| 842 | * states). It either shuts the write side or marks itself as closed. The |
| 843 | * buffer flags are updated to reflect the new state. It does also close |
| 844 | * everything if the SI was marked as being in error state. If there is a |
| 845 | * data-layer shutdown, it is called. If a control layer is defined, then it is |
| 846 | * supposed to be a socket layer and file descriptors are then shutdown or |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 847 | * closed accordingly. The function automatically disables polling if needed. |
| 848 | * Note: at the moment, we continue to check conn->ctrl eventhough we *know* it |
| 849 | * is valid. This will help selecting the proper shutdown() and setsockopt() |
| 850 | * calls if/when we implement remote sockets later. |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 851 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 852 | static void stream_int_shutw_conn(struct stream_interface *si) |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 853 | { |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 854 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 855 | |
| 856 | si->ob->flags &= ~CF_SHUTW_NOW; |
| 857 | if (si->ob->flags & CF_SHUTW) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 858 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 859 | si->ob->flags |= CF_SHUTW; |
| 860 | si->ob->wex = TICK_ETERNITY; |
| 861 | si->flags &= ~SI_FL_WAIT_DATA; |
| 862 | |
| 863 | switch (si->state) { |
| 864 | case SI_ST_EST: |
| 865 | /* we have to shut before closing, otherwise some short messages |
| 866 | * may never leave the system, especially when there are remaining |
| 867 | * unread data in the socket input buffer, or when nolinger is set. |
| 868 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 869 | * no risk so we close both sides immediately. |
| 870 | */ |
| 871 | if (si->flags & SI_FL_ERR) { |
| 872 | /* quick close, the socket is alredy shut anyway */ |
| 873 | } |
| 874 | else if (si->flags & SI_FL_NOLINGER) { |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 875 | /* unclean data-layer shutdown */ |
| 876 | if (conn->xprt && conn->xprt->shutw) |
| 877 | conn->xprt->shutw(conn, 0); |
| 878 | } |
| 879 | else { |
| 880 | /* clean data-layer shutdown */ |
| 881 | if (conn->xprt && conn->xprt->shutw) |
| 882 | conn->xprt->shutw(conn, 1); |
| 883 | |
| 884 | /* If the stream interface is configured to disable half-open |
| 885 | * connections, we'll skip the shutdown(), but only if the |
| 886 | * read size is already closed. Otherwise we can't support |
| 887 | * closed write with pending read (eg: abortonclose while |
| 888 | * waiting for the server). |
| 889 | */ |
| 890 | if (!(si->flags & SI_FL_NOHALF) || !(si->ib->flags & (CF_SHUTR|CF_DONT_READ))) { |
| 891 | /* We shutdown transport layer */ |
Willy Tarreau | d02cdd2 | 2013-12-15 10:23:20 +0100 | [diff] [blame] | 892 | if (conn_ctrl_ready(conn)) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 893 | shutdown(conn->t.sock.fd, SHUT_WR); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 894 | |
| 895 | if (!(si->ib->flags & (CF_SHUTR|CF_DONT_READ))) { |
| 896 | /* OK just a shutw, but we want the caller |
| 897 | * to disable polling on this FD if exists. |
| 898 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 899 | if (conn->ctrl) |
| 900 | conn_data_stop_send(conn); |
| 901 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 902 | } |
| 903 | } |
| 904 | } |
| 905 | |
| 906 | /* fall through */ |
| 907 | case SI_ST_CON: |
| 908 | /* we may have to close a pending connection, and mark the |
| 909 | * response buffer as shutr |
| 910 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 911 | conn_full_close(conn); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 912 | /* fall through */ |
| 913 | case SI_ST_CER: |
| 914 | case SI_ST_QUE: |
| 915 | case SI_ST_TAR: |
| 916 | si->state = SI_ST_DIS; |
Willy Tarreau | 4a59f2f | 2013-10-24 20:10:45 +0200 | [diff] [blame] | 917 | /* fall through */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 918 | default: |
| 919 | si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER); |
| 920 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 921 | si->ib->flags |= CF_SHUTR; |
| 922 | si->ib->rex = TICK_ETERNITY; |
| 923 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 924 | } |
| 925 | } |
| 926 | |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 927 | /* This function is used for inter-stream-interface calls. It is called by the |
| 928 | * consumer to inform the producer side that it may be interested in checking |
| 929 | * for free space in the buffer. Note that it intentionally does not update |
| 930 | * timeouts, so that we can still check them later at wake-up. This function is |
| 931 | * dedicated to connection-based stream interfaces. |
| 932 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 933 | static void stream_int_chk_rcv_conn(struct stream_interface *si) |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 934 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 935 | struct channel *ib = si->ib; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 936 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 937 | |
Willy Tarreau | 34ffd77 | 2012-09-03 16:51:27 +0200 | [diff] [blame] | 938 | if (unlikely(si->state > SI_ST_EST || (ib->flags & CF_SHUTR))) |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 939 | return; |
| 940 | |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 941 | conn_refresh_polling_flags(conn); |
Willy Tarreau | 7d28149 | 2012-12-16 19:19:13 +0100 | [diff] [blame] | 942 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 943 | if ((ib->flags & CF_DONT_READ) || channel_full(ib)) { |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 944 | /* stop reading */ |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 945 | if (!(ib->flags & CF_DONT_READ)) /* full */ |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 946 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 947 | __conn_data_stop_recv(conn); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 948 | } |
| 949 | else { |
| 950 | /* (re)start reading */ |
| 951 | si->flags &= ~SI_FL_WAIT_ROOM; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 952 | __conn_data_want_recv(conn); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 953 | } |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 954 | conn_cond_update_data_polling(conn); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 955 | } |
| 956 | |
| 957 | |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 958 | /* This function is used for inter-stream-interface calls. It is called by the |
| 959 | * producer to inform the consumer side that it may be interested in checking |
| 960 | * for data in the buffer. Note that it intentionally does not update timeouts, |
| 961 | * so that we can still check them later at wake-up. |
| 962 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 963 | static void stream_int_chk_snd_conn(struct stream_interface *si) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 964 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 965 | struct channel *ob = si->ob; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 966 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 967 | |
Willy Tarreau | 34ffd77 | 2012-09-03 16:51:27 +0200 | [diff] [blame] | 968 | if (unlikely(si->state > SI_ST_EST || (ob->flags & CF_SHUTW))) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 969 | return; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 970 | |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 971 | if (unlikely(channel_is_empty(ob))) /* called with nothing to send ! */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 972 | return; |
| 973 | |
| 974 | if (!ob->pipe && /* spliced data wants to be forwarded ASAP */ |
Willy Tarreau | b016587 | 2012-12-15 10:12:39 +0100 | [diff] [blame] | 975 | !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 976 | return; |
| 977 | |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 978 | 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] | 979 | /* already subscribed to write notifications, will be called |
| 980 | * anyway, so let's avoid calling it especially if the reader |
| 981 | * is not ready. |
| 982 | */ |
| 983 | return; |
| 984 | } |
| 985 | |
Willy Tarreau | 708e717 | 2014-01-21 10:27:49 +0100 | [diff] [blame] | 986 | /* Before calling the data-level operations, we have to prepare |
| 987 | * the polling flags to ensure we properly detect changes. |
| 988 | */ |
| 989 | conn_refresh_polling_flags(conn); |
| 990 | __conn_data_want_send(conn); |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 991 | |
Willy Tarreau | 708e717 | 2014-01-21 10:27:49 +0100 | [diff] [blame] | 992 | 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] | 993 | si_conn_send(conn); |
Willy Tarreau | 798c3c9 | 2014-01-21 10:30:08 +0100 | [diff] [blame] | 994 | if (conn->flags & CO_FL_ERROR) { |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 995 | /* Write error on the file descriptor */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 996 | __conn_data_stop_both(conn); |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 997 | si->flags |= SI_FL_ERR; |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 998 | goto out_wakeup; |
| 999 | } |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1000 | } |
| 1001 | |
| 1002 | /* OK, so now we know that some data might have been sent, and that we may |
| 1003 | * have to poll first. We have to do that too if the buffer is not empty. |
| 1004 | */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 1005 | if (channel_is_empty(ob)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1006 | /* the connection is established but we can't write. Either the |
| 1007 | * buffer is empty, or we just refrain from sending because the |
| 1008 | * ->o limit was reached. Maybe we just wrote the last |
| 1009 | * chunk and need to close. |
| 1010 | */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1011 | __conn_data_stop_send(conn); |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 1012 | if (((ob->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) == |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1013 | (CF_AUTO_CLOSE|CF_SHUTW_NOW)) && |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1014 | (si->state == SI_ST_EST)) { |
| 1015 | si_shutw(si); |
| 1016 | goto out_wakeup; |
| 1017 | } |
| 1018 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 1019 | if ((ob->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1020 | si->flags |= SI_FL_WAIT_DATA; |
| 1021 | ob->wex = TICK_ETERNITY; |
| 1022 | } |
| 1023 | else { |
| 1024 | /* Otherwise there are remaining data to be sent in the buffer, |
| 1025 | * which means we have to poll before doing so. |
| 1026 | */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1027 | __conn_data_want_send(conn); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1028 | si->flags &= ~SI_FL_WAIT_DATA; |
| 1029 | if (!tick_isset(ob->wex)) |
| 1030 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 1031 | } |
| 1032 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1033 | if (likely(ob->flags & CF_WRITE_ACTIVITY)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1034 | /* update timeout if we have written something */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1035 | if ((ob->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 1036 | !channel_is_empty(ob)) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1037 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 1038 | |
| 1039 | if (tick_isset(si->ib->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
| 1040 | /* Note: to prevent the client from expiring read timeouts |
| 1041 | * during writes, we refresh it. We only do this if the |
| 1042 | * interface is not configured for "independent streams", |
| 1043 | * because for some applications it's better not to do this, |
| 1044 | * for instance when continuously exchanging small amounts |
| 1045 | * of data which can full the socket buffers long before a |
| 1046 | * write timeout is detected. |
| 1047 | */ |
| 1048 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
| 1049 | } |
| 1050 | } |
| 1051 | |
| 1052 | /* in case of special condition (error, shutdown, end of write...), we |
| 1053 | * have to notify the task. |
| 1054 | */ |
Willy Tarreau | e6300be | 2014-01-25 02:33:21 +0100 | [diff] [blame] | 1055 | if (likely((ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) || |
| 1056 | ((ob->flags & CF_WAKE_WRITE) && |
| 1057 | ((channel_is_empty(si->ob) && !ob->to_forward) || |
| 1058 | si->state != SI_ST_EST)))) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1059 | out_wakeup: |
| 1060 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 1061 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 1062 | } |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 1063 | |
| 1064 | /* commit possible polling changes */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1065 | conn_cond_update_polling(conn); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1066 | } |
| 1067 | |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1068 | /* |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1069 | * 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] | 1070 | * into the buffer from the connection. It iterates over the transport layer's |
| 1071 | * rcv_buf function. |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1072 | */ |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 1073 | static void si_conn_recv_cb(struct connection *conn) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1074 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 1075 | struct stream_interface *si = conn->owner; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1076 | struct channel *chn = si->ib; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1077 | int ret, max, cur_read; |
| 1078 | int read_poll = MAX_READ_POLL_LOOPS; |
| 1079 | |
| 1080 | /* stop immediately on errors. Note that we DON'T want to stop on |
| 1081 | * POLL_ERR, as the poller might report a write error while there |
| 1082 | * are still data available in the recv buffer. This typically |
| 1083 | * happens when we send too large a request to a backend server |
| 1084 | * which rejects it before reading it all. |
| 1085 | */ |
| 1086 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1087 | return; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1088 | |
| 1089 | /* stop here if we reached the end of data */ |
| 1090 | if (conn_data_read0_pending(conn)) |
| 1091 | goto out_shutdown_r; |
| 1092 | |
| 1093 | /* maybe we were called immediately after an asynchronous shutr */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1094 | if (chn->flags & CF_SHUTR) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1095 | return; |
| 1096 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1097 | cur_read = 0; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1098 | |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1099 | if ((chn->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !chn->buf->o && |
Willy Tarreau | 7e31273 | 2014-02-12 16:35:14 +0100 | [diff] [blame] | 1100 | global.tune.idle_timer && |
| 1101 | (unsigned short)(now_ms - chn->last_read) >= global.tune.idle_timer) { |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1102 | /* The buffer was empty and nothing was transferred for more |
| 1103 | * than one second. This was caused by a pause and not by |
| 1104 | * congestion. Reset any streaming mode to reduce latency. |
| 1105 | */ |
| 1106 | chn->xfer_small = 0; |
| 1107 | chn->xfer_large = 0; |
| 1108 | chn->flags &= ~(CF_STREAMER | CF_STREAMER_FAST); |
| 1109 | } |
| 1110 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1111 | /* First, let's see if we may splice data across the channel without |
| 1112 | * using a buffer. |
| 1113 | */ |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 1114 | if (conn->xprt->rcv_pipe && |
Willy Tarreau | fa8e2bc | 2013-07-18 22:21:54 +0200 | [diff] [blame] | 1115 | (chn->pipe || chn->to_forward >= MIN_SPLICE_FORWARD) && |
| 1116 | chn->flags & CF_KERN_SPLICING) { |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1117 | if (buffer_not_empty(chn->buf)) { |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1118 | /* We're embarrassed, there are already data pending in |
| 1119 | * the buffer and we don't want to have them at two |
| 1120 | * locations at a time. Let's indicate we need some |
| 1121 | * place and ask the consumer to hurry. |
| 1122 | */ |
| 1123 | goto abort_splice; |
| 1124 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1125 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1126 | if (unlikely(chn->pipe == NULL)) { |
| 1127 | if (pipes_used >= global.maxpipes || !(chn->pipe = get_pipe())) { |
| 1128 | chn->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1129 | goto abort_splice; |
| 1130 | } |
| 1131 | } |
| 1132 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1133 | ret = conn->xprt->rcv_pipe(conn, chn->pipe, chn->to_forward); |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1134 | if (ret < 0) { |
| 1135 | /* splice not supported on this end, let's disable it */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1136 | chn->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1137 | goto abort_splice; |
| 1138 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1139 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1140 | if (ret > 0) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1141 | if (chn->to_forward != CHN_INFINITE_FORWARD) |
| 1142 | chn->to_forward -= ret; |
| 1143 | chn->total += ret; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1144 | cur_read += ret; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1145 | chn->flags |= CF_READ_PARTIAL; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1146 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1147 | |
| 1148 | if (conn_data_read0_pending(conn)) |
| 1149 | goto out_shutdown_r; |
| 1150 | |
| 1151 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1152 | return; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1153 | |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1154 | if (conn->flags & CO_FL_WAIT_ROOM) { |
| 1155 | /* the pipe is full or we have read enough data that it |
| 1156 | * could soon be full. Let's stop before needing to poll. |
| 1157 | */ |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1158 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1159 | __conn_data_stop_recv(conn); |
| 1160 | } |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1161 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1162 | /* splice not possible (anymore), let's go on on standard copy */ |
| 1163 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1164 | |
| 1165 | abort_splice: |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1166 | if (chn->pipe && unlikely(!chn->pipe->data)) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1167 | put_pipe(chn->pipe); |
| 1168 | chn->pipe = NULL; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1169 | } |
| 1170 | |
Willy Tarreau | 10fc09e | 2014-11-25 19:46:36 +0100 | [diff] [blame] | 1171 | /* now we'll need a buffer */ |
| 1172 | if (!session_alloc_recv_buffer(si_sess(si), &chn->buf)) { |
| 1173 | si->flags |= SI_FL_WAIT_ROOM; |
| 1174 | goto end_recv; |
| 1175 | } |
| 1176 | |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1177 | /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling |
| 1178 | * was enabled, which implies that the recv buffer was not full. So we have a guarantee |
| 1179 | * that if such an event is not handled above in splice, it will be handled here by |
| 1180 | * recv(). |
| 1181 | */ |
Willy Tarreau | 310987a | 2014-01-22 19:46:33 +0100 | [diff] [blame] | 1182 | 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 | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1183 | max = bi_avail(chn); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1184 | |
| 1185 | if (!max) { |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1186 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1187 | break; |
| 1188 | } |
| 1189 | |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1190 | ret = conn->xprt->rcv_buf(conn, chn->buf, max); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1191 | if (ret <= 0) |
| 1192 | break; |
| 1193 | |
| 1194 | cur_read += ret; |
| 1195 | |
| 1196 | /* if we're allowed to directly forward data, we must update ->o */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1197 | if (chn->to_forward && !(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1198 | unsigned long fwd = ret; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1199 | if (chn->to_forward != CHN_INFINITE_FORWARD) { |
| 1200 | if (fwd > chn->to_forward) |
| 1201 | fwd = chn->to_forward; |
| 1202 | chn->to_forward -= fwd; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1203 | } |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1204 | b_adv(chn->buf, fwd); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1205 | } |
| 1206 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1207 | chn->flags |= CF_READ_PARTIAL; |
| 1208 | chn->total += ret; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1209 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1210 | if (channel_full(chn)) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1211 | si->flags |= SI_FL_WAIT_ROOM; |
| 1212 | break; |
| 1213 | } |
| 1214 | |
Willy Tarreau | 5fddab0 | 2012-11-09 18:27:26 +0100 | [diff] [blame] | 1215 | if ((chn->flags & CF_READ_DONTWAIT) || --read_poll <= 0) { |
Willy Tarreau | 34ac566 | 2012-12-19 18:01:02 +0100 | [diff] [blame] | 1216 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | d486ef5 | 2012-12-10 17:03:52 +0100 | [diff] [blame] | 1217 | __conn_data_stop_recv(conn); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1218 | break; |
Willy Tarreau | 5fddab0 | 2012-11-09 18:27:26 +0100 | [diff] [blame] | 1219 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1220 | |
| 1221 | /* if too many bytes were missing from last read, it means that |
| 1222 | * it's pointless trying to read again because the system does |
| 1223 | * not have them in buffers. |
| 1224 | */ |
| 1225 | if (ret < max) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1226 | /* if a streamer has read few data, it may be because we |
| 1227 | * have exhausted system buffers. It's not worth trying |
| 1228 | * again. |
| 1229 | */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1230 | if (chn->flags & CF_STREAMER) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1231 | break; |
| 1232 | |
| 1233 | /* if we read a large block smaller than what we requested, |
| 1234 | * it's almost certain we'll never get anything more. |
| 1235 | */ |
| 1236 | if (ret >= global.tune.recv_enough) |
| 1237 | break; |
| 1238 | } |
| 1239 | } /* while !flags */ |
| 1240 | |
Willy Tarreau | c5890e6 | 2014-02-09 17:47:01 +0100 | [diff] [blame] | 1241 | if (cur_read) { |
| 1242 | if ((chn->flags & (CF_STREAMER | CF_STREAMER_FAST)) && |
| 1243 | (cur_read <= chn->buf->size / 2)) { |
| 1244 | chn->xfer_large = 0; |
| 1245 | chn->xfer_small++; |
| 1246 | if (chn->xfer_small >= 3) { |
| 1247 | /* we have read less than half of the buffer in |
| 1248 | * one pass, and this happened at least 3 times. |
| 1249 | * This is definitely not a streamer. |
| 1250 | */ |
| 1251 | chn->flags &= ~(CF_STREAMER | CF_STREAMER_FAST); |
| 1252 | } |
| 1253 | else if (chn->xfer_small >= 2) { |
| 1254 | /* if the buffer has been at least half full twice, |
| 1255 | * we receive faster than we send, so at least it |
| 1256 | * is not a "fast streamer". |
| 1257 | */ |
| 1258 | chn->flags &= ~CF_STREAMER_FAST; |
| 1259 | } |
| 1260 | } |
| 1261 | else if (!(chn->flags & CF_STREAMER_FAST) && |
| 1262 | (cur_read >= chn->buf->size - global.tune.maxrewrite)) { |
| 1263 | /* we read a full buffer at once */ |
| 1264 | chn->xfer_small = 0; |
| 1265 | chn->xfer_large++; |
| 1266 | if (chn->xfer_large >= 3) { |
| 1267 | /* we call this buffer a fast streamer if it manages |
| 1268 | * to be filled in one call 3 consecutive times. |
| 1269 | */ |
| 1270 | chn->flags |= (CF_STREAMER | CF_STREAMER_FAST); |
| 1271 | } |
| 1272 | } |
| 1273 | else { |
| 1274 | chn->xfer_small = 0; |
| 1275 | chn->xfer_large = 0; |
| 1276 | } |
| 1277 | chn->last_read = now_ms; |
| 1278 | } |
| 1279 | |
Willy Tarreau | 10fc09e | 2014-11-25 19:46:36 +0100 | [diff] [blame] | 1280 | end_recv: |
| 1281 | if (conn->flags & CO_FL_ERROR) |
| 1282 | return; |
| 1283 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1284 | if (conn_data_read0_pending(conn)) |
| 1285 | /* connection closed */ |
| 1286 | goto out_shutdown_r; |
| 1287 | |
| 1288 | return; |
| 1289 | |
| 1290 | out_shutdown_r: |
| 1291 | /* we received a shutdown */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1292 | chn->flags |= CF_READ_NULL; |
| 1293 | if (chn->flags & CF_AUTO_CLOSE) |
| 1294 | channel_shutw_now(chn); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1295 | stream_sock_read0(si); |
| 1296 | conn_data_read0(conn); |
| 1297 | return; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1298 | } |
| 1299 | |
| 1300 | /* |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1301 | * 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] | 1302 | * from the buffer to the connection. It iterates over the transport layer's |
| 1303 | * snd_buf function. |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1304 | */ |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 1305 | static void si_conn_send_cb(struct connection *conn) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1306 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 1307 | struct stream_interface *si = conn->owner; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1308 | struct channel *chn = si->ob; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1309 | |
| 1310 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1311 | return; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1312 | |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1313 | if (conn->flags & CO_FL_HANDSHAKE) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1314 | /* a handshake was requested */ |
| 1315 | return; |
| 1316 | |
| 1317 | /* we might have been called just after an asynchronous shutw */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1318 | if (chn->flags & CF_SHUTW) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1319 | return; |
| 1320 | |
| 1321 | /* OK there are data waiting to be sent */ |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1322 | si_conn_send(conn); |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1323 | |
| 1324 | /* OK all done */ |
| 1325 | return; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1326 | } |
| 1327 | |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1328 | /* |
| 1329 | * This function propagates a null read received on a socket-based connection. |
| 1330 | * It updates the stream interface. If the stream interface has SI_FL_NOHALF, |
| 1331 | * the close is also forwarded to the write side as an abort. This function is |
| 1332 | * still socket-specific as it handles a setsockopt() call to set the SO_LINGER |
| 1333 | * state on the socket. |
| 1334 | */ |
| 1335 | void stream_sock_read0(struct stream_interface *si) |
| 1336 | { |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1337 | struct connection *conn = __objt_conn(si->end); |
| 1338 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1339 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 1340 | if (si->ib->flags & CF_SHUTR) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1341 | return; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1342 | si->ib->flags |= CF_SHUTR; |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1343 | si->ib->rex = TICK_ETERNITY; |
| 1344 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 1345 | |
| 1346 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
| 1347 | return; |
| 1348 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1349 | if (si->ob->flags & CF_SHUTW) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1350 | goto do_close; |
| 1351 | |
| 1352 | if (si->flags & SI_FL_NOHALF) { |
| 1353 | /* we want to immediately forward this close to the write side */ |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1354 | /* force flag on ssl to keep session in cache */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1355 | if (conn->xprt->shutw) |
| 1356 | conn->xprt->shutw(conn, 0); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1357 | goto do_close; |
| 1358 | } |
| 1359 | |
| 1360 | /* otherwise that's just a normal read shutdown */ |
Willy Tarreau | ad38ace | 2013-12-15 14:19:38 +0100 | [diff] [blame] | 1361 | if (conn_ctrl_ready(conn)) |
| 1362 | fdtab[conn->t.sock.fd].linger_risk = 0; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1363 | __conn_data_stop_recv(conn); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1364 | return; |
| 1365 | |
| 1366 | do_close: |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1367 | /* 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] | 1368 | conn_full_close(conn); |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1369 | |
| 1370 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 1371 | si->ib->flags |= CF_SHUTR; |
| 1372 | si->ib->rex = TICK_ETERNITY; |
| 1373 | |
| 1374 | si->ob->flags &= ~CF_SHUTW_NOW; |
| 1375 | si->ob->flags |= CF_SHUTW; |
| 1376 | si->ob->wex = TICK_ETERNITY; |
| 1377 | |
| 1378 | si->flags &= ~(SI_FL_WAIT_DATA | SI_FL_WAIT_ROOM); |
| 1379 | |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1380 | si->state = SI_ST_DIS; |
| 1381 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1382 | return; |
| 1383 | } |
| 1384 | |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 1385 | /* |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 1386 | * Local variables: |
| 1387 | * c-indent-level: 8 |
| 1388 | * c-basic-offset: 8 |
| 1389 | * End: |
| 1390 | */ |