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 | |
| 22 | #include <common/compat.h> |
| 23 | #include <common/config.h> |
| 24 | #include <common/debug.h> |
| 25 | #include <common/standard.h> |
| 26 | #include <common/ticks.h> |
| 27 | #include <common/time.h> |
| 28 | |
Willy Tarreau | c7e4238 | 2012-08-24 19:22:53 +0200 | [diff] [blame] | 29 | #include <proto/channel.h> |
Willy Tarreau | 8b11708 | 2012-08-06 15:06:49 +0200 | [diff] [blame] | 30 | #include <proto/connection.h> |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 31 | #include <proto/fd.h> |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 32 | #include <proto/pipe.h> |
Willy Tarreau | 269358d | 2009-09-20 20:14:49 +0200 | [diff] [blame] | 33 | #include <proto/stream_interface.h> |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 34 | #include <proto/task.h> |
| 35 | |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 36 | #include <types/pipe.h> |
| 37 | |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 38 | /* socket functions used when running a stream interface as a task */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 39 | static void stream_int_update_embedded(struct stream_interface *si); |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 40 | static void stream_int_shutr(struct stream_interface *si); |
| 41 | static void stream_int_shutw(struct stream_interface *si); |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 42 | static void stream_int_chk_rcv(struct stream_interface *si); |
| 43 | static void stream_int_chk_snd(struct stream_interface *si); |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 44 | static void stream_int_update_conn(struct stream_interface *si); |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 45 | static void stream_int_shutr_conn(struct stream_interface *si); |
| 46 | static void stream_int_shutw_conn(struct stream_interface *si); |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 47 | static void stream_int_chk_rcv_conn(struct stream_interface *si); |
| 48 | static void stream_int_chk_snd_conn(struct stream_interface *si); |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 49 | static void si_conn_recv_cb(struct connection *conn); |
| 50 | static void si_conn_send_cb(struct connection *conn); |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 51 | static int si_conn_wake_cb(struct connection *conn); |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 52 | static int si_idle_conn_wake_cb(struct connection *conn); |
| 53 | static void si_idle_conn_null_cb(struct connection *conn); |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 54 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 55 | /* stream-interface operations for embedded tasks */ |
| 56 | struct si_ops si_embedded_ops = { |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 57 | .update = stream_int_update_embedded, |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 58 | .chk_rcv = stream_int_chk_rcv, |
| 59 | .chk_snd = stream_int_chk_snd, |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 60 | .shutr = stream_int_shutr, |
| 61 | .shutw = stream_int_shutw, |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 62 | }; |
| 63 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 64 | /* stream-interface operations for connections */ |
| 65 | struct si_ops si_conn_ops = { |
| 66 | .update = stream_int_update_conn, |
| 67 | .chk_rcv = stream_int_chk_rcv_conn, |
| 68 | .chk_snd = stream_int_chk_snd_conn, |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 69 | .shutr = stream_int_shutr_conn, |
| 70 | .shutw = stream_int_shutw_conn, |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 71 | }; |
| 72 | |
Willy Tarreau | 74beec3 | 2012-10-03 00:41:04 +0200 | [diff] [blame] | 73 | struct data_cb si_conn_cb = { |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 74 | .recv = si_conn_recv_cb, |
| 75 | .send = si_conn_send_cb, |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 76 | .wake = si_conn_wake_cb, |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 77 | }; |
| 78 | |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 79 | struct data_cb si_idle_conn_cb = { |
| 80 | .recv = si_idle_conn_null_cb, |
| 81 | .send = si_idle_conn_null_cb, |
| 82 | .wake = si_idle_conn_wake_cb, |
| 83 | }; |
| 84 | |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 85 | /* |
| 86 | * This function only has to be called once after a wakeup event in case of |
| 87 | * suspected timeout. It controls the stream interface timeouts and sets |
| 88 | * si->flags accordingly. It does NOT close anything, as this timeout may |
| 89 | * be used for any purpose. It returns 1 if the timeout fired, otherwise |
| 90 | * zero. |
| 91 | */ |
| 92 | int stream_int_check_timeouts(struct stream_interface *si) |
| 93 | { |
| 94 | if (tick_is_expired(si->exp, now_ms)) { |
| 95 | si->flags |= SI_FL_EXP; |
| 96 | return 1; |
| 97 | } |
| 98 | return 0; |
| 99 | } |
| 100 | |
Willy Tarreau | fe3718a | 2008-11-30 18:14:12 +0100 | [diff] [blame] | 101 | /* 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] | 102 | void stream_int_report_error(struct stream_interface *si) |
| 103 | { |
| 104 | if (!si->err_type) |
| 105 | si->err_type = SI_ET_DATA_ERR; |
| 106 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 107 | si->ob->flags |= CF_WRITE_ERROR; |
| 108 | si->ib->flags |= CF_READ_ERROR; |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 109 | } |
| 110 | |
| 111 | /* |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 112 | * Returns a message to the client ; the connection is shut down for read, |
| 113 | * and the request is cleared so that no server connection can be initiated. |
| 114 | * The buffer is marked for read shutdown on the other side to protect the |
| 115 | * 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] | 116 | * "chunk". If it is null, then an empty message is used. The reply buffer does |
| 117 | * not need to be empty before this, and its contents will not be overwritten. |
| 118 | * 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] | 119 | */ |
| 120 | void stream_int_retnclose(struct stream_interface *si, const struct chunk *msg) |
| 121 | { |
Willy Tarreau | 8263d2b | 2012-08-28 00:06:31 +0200 | [diff] [blame] | 122 | channel_auto_read(si->ib); |
| 123 | channel_abort(si->ib); |
| 124 | channel_auto_close(si->ib); |
| 125 | channel_erase(si->ib); |
Willy Tarreau | 798e128 | 2010-12-12 13:06:00 +0100 | [diff] [blame] | 126 | |
Willy Tarreau | 9dab5fc | 2012-05-07 11:56:55 +0200 | [diff] [blame] | 127 | bi_erase(si->ob); |
Willy Tarreau | 148d099 | 2010-01-10 10:21:21 +0100 | [diff] [blame] | 128 | if (likely(msg && msg->len)) |
Willy Tarreau | 9dab5fc | 2012-05-07 11:56:55 +0200 | [diff] [blame] | 129 | bo_inject(si->ob, msg->str, msg->len); |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 130 | |
| 131 | si->ob->wex = tick_add_ifset(now_ms, si->ob->wto); |
Willy Tarreau | 8263d2b | 2012-08-28 00:06:31 +0200 | [diff] [blame] | 132 | channel_auto_read(si->ob); |
| 133 | channel_auto_close(si->ob); |
| 134 | channel_shutr_now(si->ob); |
Willy Tarreau | 5d881d0 | 2009-12-27 22:51:06 +0100 | [diff] [blame] | 135 | } |
| 136 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 137 | /* 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] | 138 | static void stream_int_update_embedded(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 139 | { |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 140 | int old_flags = si->flags; |
| 141 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 142 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 143 | __FUNCTION__, |
| 144 | si, si->state, si->ib->flags, si->ob->flags); |
| 145 | |
| 146 | if (si->state != SI_ST_EST) |
| 147 | return; |
| 148 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 149 | if ((si->ob->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW && |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 150 | channel_is_empty(si->ob)) |
Willy Tarreau | 73b013b | 2012-05-21 16:31:45 +0200 | [diff] [blame] | 151 | si_shutw(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 152 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 153 | 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] | 154 | si->flags |= SI_FL_WAIT_DATA; |
| 155 | |
Willy Tarreau | 96fd4b5 | 2009-10-04 17:18:35 +0200 | [diff] [blame] | 156 | /* we're almost sure that we need some space if the buffer is not |
| 157 | * empty, even if it's not full, because the applets can't fill it. |
| 158 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 159 | 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] | 160 | si->flags |= SI_FL_WAIT_ROOM; |
| 161 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 162 | if (si->ob->flags & CF_WRITE_ACTIVITY) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 163 | if (tick_isset(si->ob->wex)) |
| 164 | si->ob->wex = tick_add_ifset(now_ms, si->ob->wto); |
| 165 | } |
| 166 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 167 | if (si->ib->flags & CF_READ_ACTIVITY || |
| 168 | (si->ob->flags & CF_WRITE_ACTIVITY && !(si->flags & SI_FL_INDEP_STR))) { |
Willy Tarreau | f27b5ea | 2009-10-03 22:01:18 +0200 | [diff] [blame] | 169 | if (tick_isset(si->ib->rex)) |
| 170 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
| 171 | } |
| 172 | |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 173 | /* save flags to detect changes */ |
| 174 | old_flags = si->flags; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 175 | 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] | 176 | !channel_full(si->ob) && |
Willy Tarreau | 96fd4b5 | 2009-10-04 17:18:35 +0200 | [diff] [blame] | 177 | (si->ob->prod->flags & SI_FL_WAIT_ROOM))) |
Willy Tarreau | 73b013b | 2012-05-21 16:31:45 +0200 | [diff] [blame] | 178 | si_chk_rcv(si->ob->prod); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 179 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 180 | if (((si->ib->flags & CF_READ_PARTIAL) && !channel_is_empty(si->ib)) && |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 181 | (si->ib->cons->flags & SI_FL_WAIT_DATA)) { |
Willy Tarreau | 73b013b | 2012-05-21 16:31:45 +0200 | [diff] [blame] | 182 | si_chk_snd(si->ib->cons); |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 183 | /* check if the consumer has freed some space */ |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 184 | if (!channel_full(si->ib)) |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 185 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 186 | } |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 187 | |
| 188 | /* Note that we're trying to wake up in two conditions here : |
| 189 | * - special event, which needs the holder task attention |
| 190 | * - status indicating that the applet can go on working. This |
| 191 | * is rather hard because we might be blocking on output and |
| 192 | * 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] | 193 | * to only rely on the changes the chk_* might have performed. |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 194 | */ |
| 195 | if (/* check stream interface changes */ |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 196 | ((old_flags & ~si->flags) & (SI_FL_WAIT_ROOM|SI_FL_WAIT_DATA)) || |
| 197 | |
| 198 | /* changes on the production side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 199 | (si->ib->flags & (CF_READ_NULL|CF_READ_ERROR)) || |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 200 | si->state != SI_ST_EST || |
| 201 | (si->flags & SI_FL_ERR) || |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 202 | ((si->ib->flags & CF_READ_PARTIAL) && |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 203 | (!si->ib->to_forward || si->ib->cons->state != SI_ST_EST)) || |
| 204 | |
| 205 | /* changes on the consumption side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 206 | (si->ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) || |
| 207 | ((si->ob->flags & CF_WRITE_ACTIVITY) && |
| 208 | ((si->ob->flags & CF_SHUTW) || |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 209 | si->ob->prod->state != SI_ST_EST || |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 210 | (channel_is_empty(si->ob) && !si->ob->to_forward)))) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 211 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 212 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 213 | } |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 214 | if (si->ib->flags & CF_READ_ACTIVITY) |
| 215 | si->ib->flags &= ~CF_READ_DONTWAIT; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 216 | } |
| 217 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 218 | /* |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 219 | * This function performs a shutdown-read on a stream interface attached to an |
| 220 | * applet in a connected or init state (it does nothing for other states). It |
| 221 | * either shuts the read side or marks itself as closed. The buffer flags are |
| 222 | * updated to reflect the new state. If the stream interface has SI_FL_NOHALF, |
| 223 | * 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] | 224 | * it exists. |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 225 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 226 | static void stream_int_shutr(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 227 | { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 228 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 229 | if (si->ib->flags & CF_SHUTR) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 230 | return; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 231 | si->ib->flags |= CF_SHUTR; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 232 | si->ib->rex = TICK_ETERNITY; |
| 233 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 234 | |
| 235 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 236 | return; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 237 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 238 | if (si->ob->flags & CF_SHUTW) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 239 | si->state = SI_ST_DIS; |
| 240 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 4a59f2f | 2013-10-24 20:10:45 +0200 | [diff] [blame] | 241 | si_applet_release(si); |
Willy Tarreau | d8ccffe | 2010-09-07 16:16:50 +0200 | [diff] [blame] | 242 | } |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 243 | else if (si->flags & SI_FL_NOHALF) { |
| 244 | /* we want to immediately forward this close to the write side */ |
| 245 | return stream_int_shutw(si); |
| 246 | } |
Willy Tarreau | 0bd05ea | 2010-07-02 11:18:03 +0200 | [diff] [blame] | 247 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 248 | /* 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] | 249 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 250 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 251 | } |
| 252 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 253 | /* |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 254 | * This function performs a shutdown-write on a stream interface attached to an |
| 255 | * applet in a connected or init state (it does nothing for other states). It |
| 256 | * either shuts the write side or marks itself as closed. The buffer flags are |
| 257 | * updated to reflect the new state. It does also close everything if the SI |
| 258 | * 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] | 259 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 260 | static void stream_int_shutw(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 261 | { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 262 | si->ob->flags &= ~CF_SHUTW_NOW; |
| 263 | if (si->ob->flags & CF_SHUTW) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 264 | return; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 265 | si->ob->flags |= CF_SHUTW; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 266 | si->ob->wex = TICK_ETERNITY; |
| 267 | si->flags &= ~SI_FL_WAIT_DATA; |
| 268 | |
| 269 | switch (si->state) { |
| 270 | case SI_ST_EST: |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 271 | /* we have to shut before closing, otherwise some short messages |
| 272 | * may never leave the system, especially when there are remaining |
| 273 | * unread data in the socket input buffer, or when nolinger is set. |
| 274 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 275 | * no risk so we close both sides immediately. |
| 276 | */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 277 | if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) && |
| 278 | !(si->ib->flags & (CF_SHUTR|CF_DONT_READ))) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 279 | return; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 280 | |
| 281 | /* fall through */ |
| 282 | case SI_ST_CON: |
| 283 | case SI_ST_CER: |
Willy Tarreau | 32d3ee9 | 2010-12-29 14:03:02 +0100 | [diff] [blame] | 284 | case SI_ST_QUE: |
| 285 | case SI_ST_TAR: |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 286 | /* Note that none of these states may happen with applets */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 287 | si->state = SI_ST_DIS; |
Willy Tarreau | 4a59f2f | 2013-10-24 20:10:45 +0200 | [diff] [blame] | 288 | si_applet_release(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 289 | default: |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 290 | si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER); |
| 291 | si->ib->flags &= ~CF_SHUTR_NOW; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 292 | si->ib->flags |= CF_SHUTR; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 293 | si->ib->rex = TICK_ETERNITY; |
| 294 | si->exp = TICK_ETERNITY; |
| 295 | } |
| 296 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 297 | /* 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] | 298 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 299 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 300 | } |
| 301 | |
| 302 | /* default chk_rcv function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 303 | static void stream_int_chk_rcv(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 304 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 305 | struct channel *ib = si->ib; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 306 | |
| 307 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 308 | __FUNCTION__, |
| 309 | si, si->state, si->ib->flags, si->ob->flags); |
| 310 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 311 | 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] | 312 | return; |
| 313 | |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 314 | if (channel_full(ib)) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 315 | /* stop reading */ |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 316 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 317 | } |
| 318 | else { |
| 319 | /* (re)start reading */ |
| 320 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 321 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 322 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 323 | } |
| 324 | } |
| 325 | |
| 326 | /* default chk_snd function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 327 | static void stream_int_chk_snd(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 328 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 329 | struct channel *ob = si->ob; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 330 | |
| 331 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 332 | __FUNCTION__, |
| 333 | si, si->state, si->ib->flags, si->ob->flags); |
| 334 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 335 | if (unlikely(si->state != SI_ST_EST || (si->ob->flags & CF_SHUTW))) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 336 | return; |
| 337 | |
| 338 | if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 339 | channel_is_empty(ob)) /* called with nothing to send ! */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 340 | return; |
| 341 | |
| 342 | /* Otherwise there are remaining data to be sent in the buffer, |
| 343 | * so we tell the handler. |
| 344 | */ |
| 345 | si->flags &= ~SI_FL_WAIT_DATA; |
| 346 | if (!tick_isset(ob->wex)) |
| 347 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 348 | |
| 349 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 350 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 351 | } |
| 352 | |
Willy Tarreau | 1fbe1c9 | 2013-12-01 09:35:41 +0100 | [diff] [blame] | 353 | /* Register an applet to handle a stream_interface as part of the |
| 354 | * stream interface's owner task. The SI will wake it up everytime it |
| 355 | * is solicited. The task's processing function must call the applet's |
| 356 | * function before returning. It must be deleted by the task handler |
| 357 | * using stream_int_unregister_handler(), possibly from within the |
| 358 | * function itself. It also pre-initializes the applet's context and |
| 359 | * returns it (or NULL in case it could not be allocated). |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 360 | */ |
Willy Tarreau | 1fbe1c9 | 2013-12-01 09:35:41 +0100 | [diff] [blame] | 361 | 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] | 362 | { |
Willy Tarreau | 0a23bcb | 2013-12-01 11:31:38 +0100 | [diff] [blame] | 363 | struct appctx *appctx; |
| 364 | |
Simon Horman | 7abd00d | 2011-08-13 08:03:51 +0900 | [diff] [blame] | 365 | 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] | 366 | |
Willy Tarreau | 0a23bcb | 2013-12-01 11:31:38 +0100 | [diff] [blame] | 367 | appctx = si_alloc_appctx(si); |
| 368 | if (!si) |
| 369 | return NULL; |
| 370 | |
| 371 | appctx_set_applet(appctx, app); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 372 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | 1fbe1c9 | 2013-12-01 09:35:41 +0100 | [diff] [blame] | 373 | return si_appctx(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 374 | } |
| 375 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 376 | /* 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] | 377 | * 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] | 378 | */ |
| 379 | void stream_int_unregister_handler(struct stream_interface *si) |
| 380 | { |
Willy Tarreau | 32e3c6a | 2013-10-11 19:34:20 +0200 | [diff] [blame] | 381 | si_detach(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 382 | } |
| 383 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 384 | /* 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] | 385 | * established. It returns 0 if it fails in a fatal way or needs to poll to go |
| 386 | * 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] | 387 | * flags (the bit is provided in <flag> by the caller). It is designed to be |
| 388 | * 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] | 389 | * Note that it can emit a PROXY line by relying on the other end's address |
| 390 | * when the connection is attached to a stream interface, or by resolving the |
| 391 | * local address otherwise (also called a LOCAL line). |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 392 | */ |
| 393 | int conn_si_send_proxy(struct connection *conn, unsigned int flag) |
| 394 | { |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 395 | /* we might have been called just after an asynchronous shutw */ |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 396 | if (conn->flags & CO_FL_SOCK_WR_SH) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 397 | goto out_error; |
| 398 | |
Willy Tarreau | d02cdd2 | 2013-12-15 10:23:20 +0100 | [diff] [blame] | 399 | if (!conn_ctrl_ready(conn)) |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 400 | goto out_error; |
| 401 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 402 | /* If we have a PROXY line to send, we'll use this to validate the |
| 403 | * connection, in which case the connection is validated only once |
| 404 | * we've sent the whole proxy line. Otherwise we use connect(). |
| 405 | */ |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 406 | while (conn->send_proxy_ofs) { |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 407 | int ret; |
| 408 | |
| 409 | /* The target server expects a PROXY line to be sent first. |
| 410 | * If the send_proxy_ofs is negative, it corresponds to the |
| 411 | * offset to start sending from then end of the proxy string |
| 412 | * (which is recomputed every time since it's constant). If |
| 413 | * it is positive, it means we have to send from the start. |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 414 | * We can only send a "normal" PROXY line when the connection |
| 415 | * is attached to a stream interface. Otherwise we can only |
| 416 | * send a LOCAL line (eg: for use with health checks). |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 417 | */ |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 418 | if (conn->data == &si_conn_cb) { |
| 419 | struct stream_interface *si = conn->owner; |
| 420 | struct connection *remote = objt_conn(si->ob->prod->end); |
| 421 | |
| 422 | if (remote) |
| 423 | ret = make_proxy_line(trash.str, trash.size, &remote->addr.from, &remote->addr.to); |
| 424 | else |
| 425 | ret = make_proxy_line(trash.str, trash.size, NULL, NULL); |
| 426 | } |
| 427 | else { |
| 428 | /* The target server expects a LOCAL line to be sent first. Retrieving |
| 429 | * local or remote addresses may fail until the connection is established. |
| 430 | */ |
| 431 | conn_get_from_addr(conn); |
| 432 | if (!(conn->flags & CO_FL_ADDR_FROM_SET)) |
| 433 | goto out_wait; |
| 434 | |
| 435 | conn_get_to_addr(conn); |
| 436 | if (!(conn->flags & CO_FL_ADDR_TO_SET)) |
| 437 | goto out_wait; |
| 438 | |
| 439 | ret = make_proxy_line(trash.str, trash.size, &conn->addr.from, &conn->addr.to); |
| 440 | } |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 441 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 442 | if (!ret) |
| 443 | goto out_error; |
| 444 | |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 445 | if (conn->send_proxy_ofs > 0) |
| 446 | conn->send_proxy_ofs = -ret; /* first call */ |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 447 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 448 | /* we have to send trash from (ret+sp for -sp bytes). If the |
| 449 | * data layer has a pending write, we'll also set MSG_MORE. |
| 450 | */ |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 451 | 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] | 452 | (conn->flags & CO_FL_DATA_WR_ENA) ? MSG_MORE : 0); |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 453 | |
| 454 | if (ret == 0) |
| 455 | goto out_wait; |
| 456 | |
| 457 | if (ret < 0) { |
Willy Tarreau | 95742a4 | 2013-09-03 09:02:11 +0200 | [diff] [blame] | 458 | if (errno == EAGAIN || errno == ENOTCONN) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 459 | goto out_wait; |
Willy Tarreau | 7fe4569 | 2013-12-04 23:37:56 +0100 | [diff] [blame] | 460 | if (errno == EINTR) |
| 461 | continue; |
Willy Tarreau | 26f4a04 | 2013-12-04 23:44:10 +0100 | [diff] [blame] | 462 | conn->flags |= CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 463 | goto out_error; |
| 464 | } |
| 465 | |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 466 | conn->send_proxy_ofs += ret; /* becomes zero once complete */ |
| 467 | if (conn->send_proxy_ofs != 0) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 468 | goto out_wait; |
| 469 | |
| 470 | /* OK we've sent the whole line, we're connected */ |
Willy Tarreau | 7fe4569 | 2013-12-04 23:37:56 +0100 | [diff] [blame] | 471 | break; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 472 | } |
| 473 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 474 | /* The connection is ready now, simply return and let the connection |
| 475 | * handler notify upper layers if needed. |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 476 | */ |
| 477 | if (conn->flags & CO_FL_WAIT_L4_CONN) |
| 478 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 479 | conn->flags &= ~flag; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 480 | return 1; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 481 | |
| 482 | out_error: |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 483 | /* Write error on the file descriptor */ |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 484 | conn->flags |= CO_FL_ERROR; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 485 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 486 | |
| 487 | out_wait: |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 488 | __conn_sock_stop_recv(conn); |
| 489 | __conn_sock_poll_send(conn); |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 490 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 491 | } |
| 492 | |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 493 | |
| 494 | /* Tiny I/O callback called on recv/send I/O events on idle connections. |
| 495 | * It simply sets the CO_FL_SOCK_RD_SH flag so that si_idle_conn_wake_cb() |
| 496 | * is notified and can kill the connection. |
| 497 | */ |
| 498 | static void si_idle_conn_null_cb(struct connection *conn) |
| 499 | { |
| 500 | if (conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH)) |
| 501 | return; |
| 502 | |
| 503 | if ((fdtab[conn->t.sock.fd].ev & (FD_POLL_ERR|FD_POLL_HUP)) || |
| 504 | (conn->ctrl->drain && conn->ctrl->drain(conn->t.sock.fd))) |
| 505 | conn->flags |= CO_FL_SOCK_RD_SH; |
| 506 | |
| 507 | /* disable draining if we were called and have no drain function */ |
| 508 | if (!conn->ctrl->drain) |
| 509 | __conn_data_stop_recv(conn); |
Willy Tarreau | ea90063 | 2013-12-17 14:21:48 +0100 | [diff] [blame] | 510 | else if (!(conn->flags & CO_FL_SOCK_RD_SH)) |
| 511 | __conn_data_poll_recv(conn); |
Willy Tarreau | 2737562 | 2013-12-17 00:00:28 +0100 | [diff] [blame] | 512 | } |
| 513 | |
| 514 | /* Callback to be used by connection I/O handlers when some activity is detected |
| 515 | * on an idle server connection. Its main purpose is to kill the connection once |
| 516 | * a close was detected on it. It returns 0 if it did nothing serious, or -1 if |
| 517 | * it killed the connection. |
| 518 | */ |
| 519 | static int si_idle_conn_wake_cb(struct connection *conn) |
| 520 | { |
| 521 | struct stream_interface *si = conn->owner; |
| 522 | |
| 523 | if (!conn_ctrl_ready(conn)) |
| 524 | return 0; |
| 525 | |
| 526 | if (conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH)) { |
| 527 | /* warning, we can't do anything on <conn> after this call ! */ |
| 528 | conn_force_close(conn); |
| 529 | conn_free(conn); |
| 530 | si->end = NULL; |
| 531 | return -1; |
| 532 | } |
| 533 | return 0; |
| 534 | } |
| 535 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 536 | /* 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] | 537 | * 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] | 538 | * 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] | 539 | * an important event requires special handling. It relies on the connection handler |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 540 | * to commit any polling updates. The function always returns 0. |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 541 | */ |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 542 | static int si_conn_wake_cb(struct connection *conn) |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 543 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 544 | struct stream_interface *si = conn->owner; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 545 | |
| 546 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 547 | __FUNCTION__, |
| 548 | si, si->state, si->ib->flags, si->ob->flags); |
| 549 | |
Willy Tarreau | 3c55ec2 | 2012-07-23 19:19:51 +0200 | [diff] [blame] | 550 | if (conn->flags & CO_FL_ERROR) |
| 551 | si->flags |= SI_FL_ERR; |
| 552 | |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 553 | /* check for recent connection establishment */ |
Willy Tarreau | c76ae33 | 2012-07-12 15:32:13 +0200 | [diff] [blame] | 554 | if (unlikely(!(conn->flags & (CO_FL_WAIT_L4_CONN | CO_FL_WAIT_L6_CONN | CO_FL_CONNECTED)))) { |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 555 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 556 | si->ob->flags |= CF_WRITE_NULL; |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 557 | } |
| 558 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 559 | /* process consumer side */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 560 | if (channel_is_empty(si->ob)) { |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 561 | if (((si->ob->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 562 | (si->state == SI_ST_EST)) |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 563 | stream_int_shutw_conn(si); |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 564 | __conn_data_stop_send(conn); |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 565 | si->ob->wex = TICK_ETERNITY; |
| 566 | } |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 567 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 568 | 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] | 569 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 570 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 571 | if (si->ob->flags & CF_WRITE_ACTIVITY) { |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 572 | /* update timeouts if we have written something */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 573 | if ((si->ob->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 574 | !channel_is_empty(si->ob)) |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 575 | if (tick_isset(si->ob->wex)) |
| 576 | si->ob->wex = tick_add_ifset(now_ms, si->ob->wto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 577 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 578 | if (!(si->flags & SI_FL_INDEP_STR)) |
| 579 | if (tick_isset(si->ib->rex)) |
| 580 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 581 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 582 | 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] | 583 | !channel_full(si->ob) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 584 | (si->ob->prod->flags & SI_FL_WAIT_ROOM))) |
| 585 | si_chk_rcv(si->ob->prod); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 586 | } |
| 587 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 588 | /* process producer side. |
| 589 | * We might have some data the consumer is waiting for. |
| 590 | * We can do fast-forwarding, but we avoid doing this for partial |
| 591 | * buffers, because it is very likely that it will be done again |
| 592 | * immediately afterwards once the following data is parsed (eg: |
| 593 | * HTTP chunking). |
| 594 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 595 | if (((si->ib->flags & CF_READ_PARTIAL) && !channel_is_empty(si->ib)) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 596 | (si->ib->pipe /* always try to send spliced data */ || |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 597 | (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] | 598 | int last_len = si->ib->pipe ? si->ib->pipe->data : 0; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 599 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 600 | si_chk_snd(si->ib->cons); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 601 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 602 | /* check if the consumer has freed some space either in the |
| 603 | * buffer or in the pipe. |
| 604 | */ |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 605 | if (!channel_full(si->ib) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 606 | (!last_len || !si->ib->pipe || si->ib->pipe->data < last_len)) |
| 607 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 608 | } |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 609 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 610 | if (si->flags & SI_FL_WAIT_ROOM) { |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 611 | __conn_data_stop_recv(conn); |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 612 | si->ib->rex = TICK_ETERNITY; |
| 613 | } |
Willy Tarreau | 6657276 | 2012-12-19 17:34:17 +0100 | [diff] [blame] | 614 | 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] | 615 | !channel_full(si->ib)) { |
Willy Tarreau | 9f7c6a1 | 2012-11-19 16:43:14 +0100 | [diff] [blame] | 616 | /* we must re-enable reading if si_chk_snd() has freed some space */ |
| 617 | __conn_data_want_recv(conn); |
Willy Tarreau | 6657276 | 2012-12-19 17:34:17 +0100 | [diff] [blame] | 618 | if (!(si->ib->flags & CF_READ_NOEXP) && tick_isset(si->ib->rex)) |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 619 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 620 | } |
| 621 | |
| 622 | /* wake the task up only when needed */ |
| 623 | if (/* changes on the production side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 624 | (si->ib->flags & (CF_READ_NULL|CF_READ_ERROR)) || |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 625 | si->state != SI_ST_EST || |
| 626 | (si->flags & SI_FL_ERR) || |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 627 | ((si->ib->flags & CF_READ_PARTIAL) && |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 628 | (!si->ib->to_forward || si->ib->cons->state != SI_ST_EST)) || |
| 629 | |
| 630 | /* changes on the consumption side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 631 | (si->ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) || |
| 632 | ((si->ob->flags & CF_WRITE_ACTIVITY) && |
| 633 | ((si->ob->flags & CF_SHUTW) || |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 634 | si->ob->prod->state != SI_ST_EST || |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 635 | (channel_is_empty(si->ob) && !si->ob->to_forward)))) { |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 636 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 637 | } |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 638 | if (si->ib->flags & CF_READ_ACTIVITY) |
| 639 | si->ib->flags &= ~CF_READ_DONTWAIT; |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 640 | return 0; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 641 | } |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 642 | |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 643 | /* |
| 644 | * This function is called to send buffer data to a stream socket. |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 645 | * It calls the transport layer's snd_buf function. It relies on the |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 646 | * caller to commit polling changes. The caller should check conn->flags |
| 647 | * for errors. |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 648 | */ |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 649 | static void si_conn_send(struct connection *conn) |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 650 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 651 | struct stream_interface *si = conn->owner; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 652 | struct channel *chn = si->ob; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 653 | int ret; |
| 654 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 655 | if (chn->pipe && conn->xprt->snd_pipe) { |
| 656 | ret = conn->xprt->snd_pipe(conn, chn->pipe); |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 657 | if (ret > 0) |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 658 | chn->flags |= CF_WRITE_PARTIAL; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 659 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 660 | if (!chn->pipe->data) { |
| 661 | put_pipe(chn->pipe); |
| 662 | chn->pipe = NULL; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 663 | } |
| 664 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 665 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 666 | return; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 667 | } |
| 668 | |
| 669 | /* At this point, the pipe is empty, but we may still have data pending |
| 670 | * in the normal buffer. |
| 671 | */ |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 672 | if (!chn->buf->o) |
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 | |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 675 | /* when we're here, we already know that there is no spliced |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 676 | * data left, and that there are sendable buffered data. |
| 677 | */ |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 678 | if (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_WR_SH | CO_FL_DATA_WR_SH | CO_FL_WAIT_DATA | CO_FL_WAIT_WR | CO_FL_HANDSHAKE))) { |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 679 | /* check if we want to inform the kernel that we're interested in |
| 680 | * sending more data after this call. We want this if : |
| 681 | * - we're about to close after this last send and want to merge |
| 682 | * the ongoing FIN with the last segment. |
| 683 | * - we know we can't send everything at once and must get back |
| 684 | * here because of unaligned data |
| 685 | * - there is still a finite amount of data to forward |
| 686 | * The test is arranged so that the most common case does only 2 |
| 687 | * tests. |
| 688 | */ |
| 689 | unsigned int send_flag = MSG_DONTWAIT | MSG_NOSIGNAL; |
| 690 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 691 | if ((!(chn->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) && |
| 692 | ((chn->to_forward && chn->to_forward != CHN_INFINITE_FORWARD) || |
| 693 | (chn->flags & CF_EXPECT_MORE))) || |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 694 | ((chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW)) |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 695 | send_flag |= MSG_MORE; |
| 696 | |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 697 | ret = conn->xprt->snd_buf(conn, chn->buf, send_flag); |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 698 | if (ret > 0) { |
| 699 | chn->flags |= CF_WRITE_PARTIAL; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 700 | |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 701 | if (!chn->buf->o) { |
| 702 | /* Always clear both flags once everything has been sent, they're one-shot */ |
| 703 | chn->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT); |
| 704 | } |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 705 | |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 706 | /* if some data remain in the buffer, it's only because the |
| 707 | * system buffers are full, we will try next time. |
| 708 | */ |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 709 | } |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 710 | } |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 711 | |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 712 | return; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 713 | } |
| 714 | |
| 715 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 716 | /* Updates the timers and flags of a stream interface attached to a connection, |
| 717 | * depending on the buffers' flags. It should only be called once after the |
| 718 | * buffer flags have settled down, and before they are cleared. It doesn't |
| 719 | * harm to call it as often as desired (it just slightly hurts performance). |
| 720 | * It is only meant to be called by upper layers after buffer flags have been |
| 721 | * manipulated by analysers. |
| 722 | */ |
| 723 | void stream_int_update_conn(struct stream_interface *si) |
| 724 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 725 | struct channel *ib = si->ib; |
| 726 | struct channel *ob = si->ob; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 727 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 728 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 729 | /* Check if we need to close the read side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 730 | if (!(ib->flags & CF_SHUTR)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 731 | /* Read not closed, update FD status and timeout for reads */ |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 732 | if ((ib->flags & CF_DONT_READ) || channel_full(ib)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 733 | /* stop reading */ |
| 734 | if (!(si->flags & SI_FL_WAIT_ROOM)) { |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 735 | if (!(ib->flags & CF_DONT_READ)) /* full */ |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 736 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 737 | conn_data_stop_recv(conn); |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 738 | ib->rex = TICK_ETERNITY; |
| 739 | } |
| 740 | } |
| 741 | else { |
| 742 | /* (re)start reading and update timeout. Note: we don't recompute the timeout |
| 743 | * everytime we get here, otherwise it would risk never to expire. We only |
| 744 | * update it if is was not yet set. The stream socket handler will already |
| 745 | * have updated it if there has been a completed I/O. |
| 746 | */ |
| 747 | si->flags &= ~SI_FL_WAIT_ROOM; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 748 | conn_data_want_recv(conn); |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 749 | 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] | 750 | ib->rex = tick_add_ifset(now_ms, ib->rto); |
| 751 | } |
| 752 | } |
| 753 | |
| 754 | /* Check if we need to close the write side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 755 | if (!(ob->flags & CF_SHUTW)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 756 | /* Write not closed, update FD status and timeout for writes */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 757 | if (channel_is_empty(ob)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 758 | /* stop writing */ |
| 759 | if (!(si->flags & SI_FL_WAIT_DATA)) { |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 760 | if ((ob->flags & CF_SHUTW_NOW) == 0) |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 761 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 762 | conn_data_stop_send(conn); |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 763 | ob->wex = TICK_ETERNITY; |
| 764 | } |
| 765 | } |
| 766 | else { |
| 767 | /* (re)start writing and update timeout. Note: we don't recompute the timeout |
| 768 | * everytime we get here, otherwise it would risk never to expire. We only |
| 769 | * update it if is was not yet set. The stream socket handler will already |
| 770 | * have updated it if there has been a completed I/O. |
| 771 | */ |
| 772 | si->flags &= ~SI_FL_WAIT_DATA; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 773 | conn_data_want_send(conn); |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 774 | if (!tick_isset(ob->wex)) { |
| 775 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 776 | if (tick_isset(ib->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
| 777 | /* Note: depending on the protocol, we don't know if we're waiting |
| 778 | * for incoming data or not. So in order to prevent the socket from |
| 779 | * expiring read timeouts during writes, we refresh the read timeout, |
| 780 | * except if it was already infinite or if we have explicitly setup |
| 781 | * independent streams. |
| 782 | */ |
| 783 | ib->rex = tick_add_ifset(now_ms, ib->rto); |
| 784 | } |
| 785 | } |
| 786 | } |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 787 | } |
| 788 | } |
| 789 | |
| 790 | /* |
| 791 | * This function performs a shutdown-read on a stream interface attached to |
| 792 | * a connection in a connected or init state (it does nothing for other |
| 793 | * states). It either shuts the read side or marks itself as closed. The buffer |
| 794 | * flags are updated to reflect the new state. If the stream interface has |
| 795 | * SI_FL_NOHALF, we also forward the close to the write side. If a control |
| 796 | * 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] | 797 | * descriptors are then shutdown or closed accordingly. The function |
| 798 | * automatically disables polling if needed. |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 799 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 800 | static void stream_int_shutr_conn(struct stream_interface *si) |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 801 | { |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 802 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 803 | |
| 804 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 805 | if (si->ib->flags & CF_SHUTR) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 806 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 807 | si->ib->flags |= CF_SHUTR; |
| 808 | si->ib->rex = TICK_ETERNITY; |
| 809 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 810 | |
| 811 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 812 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 813 | |
| 814 | if (si->ob->flags & CF_SHUTW) { |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 815 | conn_full_close(conn); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 816 | si->state = SI_ST_DIS; |
| 817 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 818 | } |
| 819 | else if (si->flags & SI_FL_NOHALF) { |
| 820 | /* we want to immediately forward this close to the write side */ |
| 821 | return stream_int_shutw_conn(si); |
| 822 | } |
| 823 | else if (conn->ctrl) { |
| 824 | /* we want the caller to disable polling on this FD */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 825 | conn_data_stop_recv(conn); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 826 | } |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 827 | } |
| 828 | |
| 829 | /* |
| 830 | * This function performs a shutdown-write on a stream interface attached to |
| 831 | * a connection in a connected or init state (it does nothing for other |
| 832 | * states). It either shuts the write side or marks itself as closed. The |
| 833 | * buffer flags are updated to reflect the new state. It does also close |
| 834 | * everything if the SI was marked as being in error state. If there is a |
| 835 | * data-layer shutdown, it is called. If a control layer is defined, then it is |
| 836 | * 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] | 837 | * closed accordingly. The function automatically disables polling if needed. |
| 838 | * Note: at the moment, we continue to check conn->ctrl eventhough we *know* it |
| 839 | * is valid. This will help selecting the proper shutdown() and setsockopt() |
| 840 | * calls if/when we implement remote sockets later. |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 841 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 842 | static void stream_int_shutw_conn(struct stream_interface *si) |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 843 | { |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 844 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 845 | |
| 846 | si->ob->flags &= ~CF_SHUTW_NOW; |
| 847 | if (si->ob->flags & CF_SHUTW) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 848 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 849 | si->ob->flags |= CF_SHUTW; |
| 850 | si->ob->wex = TICK_ETERNITY; |
| 851 | si->flags &= ~SI_FL_WAIT_DATA; |
| 852 | |
| 853 | switch (si->state) { |
| 854 | case SI_ST_EST: |
| 855 | /* we have to shut before closing, otherwise some short messages |
| 856 | * may never leave the system, especially when there are remaining |
| 857 | * unread data in the socket input buffer, or when nolinger is set. |
| 858 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 859 | * no risk so we close both sides immediately. |
| 860 | */ |
| 861 | if (si->flags & SI_FL_ERR) { |
| 862 | /* quick close, the socket is alredy shut anyway */ |
| 863 | } |
| 864 | else if (si->flags & SI_FL_NOLINGER) { |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 865 | /* unclean data-layer shutdown */ |
| 866 | if (conn->xprt && conn->xprt->shutw) |
| 867 | conn->xprt->shutw(conn, 0); |
| 868 | } |
| 869 | else { |
| 870 | /* clean data-layer shutdown */ |
| 871 | if (conn->xprt && conn->xprt->shutw) |
| 872 | conn->xprt->shutw(conn, 1); |
| 873 | |
| 874 | /* If the stream interface is configured to disable half-open |
| 875 | * connections, we'll skip the shutdown(), but only if the |
| 876 | * read size is already closed. Otherwise we can't support |
| 877 | * closed write with pending read (eg: abortonclose while |
| 878 | * waiting for the server). |
| 879 | */ |
| 880 | if (!(si->flags & SI_FL_NOHALF) || !(si->ib->flags & (CF_SHUTR|CF_DONT_READ))) { |
| 881 | /* We shutdown transport layer */ |
Willy Tarreau | d02cdd2 | 2013-12-15 10:23:20 +0100 | [diff] [blame] | 882 | if (conn_ctrl_ready(conn)) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 883 | shutdown(conn->t.sock.fd, SHUT_WR); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 884 | |
| 885 | if (!(si->ib->flags & (CF_SHUTR|CF_DONT_READ))) { |
| 886 | /* OK just a shutw, but we want the caller |
| 887 | * to disable polling on this FD if exists. |
| 888 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 889 | if (conn->ctrl) |
| 890 | conn_data_stop_send(conn); |
| 891 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 892 | } |
| 893 | } |
| 894 | } |
| 895 | |
| 896 | /* fall through */ |
| 897 | case SI_ST_CON: |
| 898 | /* we may have to close a pending connection, and mark the |
| 899 | * response buffer as shutr |
| 900 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 901 | conn_full_close(conn); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 902 | /* fall through */ |
| 903 | case SI_ST_CER: |
| 904 | case SI_ST_QUE: |
| 905 | case SI_ST_TAR: |
| 906 | si->state = SI_ST_DIS; |
Willy Tarreau | 4a59f2f | 2013-10-24 20:10:45 +0200 | [diff] [blame] | 907 | /* fall through */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 908 | default: |
| 909 | si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER); |
| 910 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 911 | si->ib->flags |= CF_SHUTR; |
| 912 | si->ib->rex = TICK_ETERNITY; |
| 913 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 914 | } |
| 915 | } |
| 916 | |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 917 | /* This function is used for inter-stream-interface calls. It is called by the |
| 918 | * consumer to inform the producer side that it may be interested in checking |
| 919 | * for free space in the buffer. Note that it intentionally does not update |
| 920 | * timeouts, so that we can still check them later at wake-up. This function is |
| 921 | * dedicated to connection-based stream interfaces. |
| 922 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 923 | static void stream_int_chk_rcv_conn(struct stream_interface *si) |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 924 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 925 | struct channel *ib = si->ib; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 926 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 927 | |
Willy Tarreau | 34ffd77 | 2012-09-03 16:51:27 +0200 | [diff] [blame] | 928 | if (unlikely(si->state > SI_ST_EST || (ib->flags & CF_SHUTR))) |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 929 | return; |
| 930 | |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 931 | conn_refresh_polling_flags(conn); |
Willy Tarreau | 7d28149 | 2012-12-16 19:19:13 +0100 | [diff] [blame] | 932 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 933 | if ((ib->flags & CF_DONT_READ) || channel_full(ib)) { |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 934 | /* stop reading */ |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 935 | if (!(ib->flags & CF_DONT_READ)) /* full */ |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 936 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 937 | __conn_data_stop_recv(conn); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 938 | } |
| 939 | else { |
| 940 | /* (re)start reading */ |
| 941 | si->flags &= ~SI_FL_WAIT_ROOM; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 942 | __conn_data_want_recv(conn); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 943 | } |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 944 | conn_cond_update_data_polling(conn); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 945 | } |
| 946 | |
| 947 | |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 948 | /* This function is used for inter-stream-interface calls. It is called by the |
| 949 | * producer to inform the consumer side that it may be interested in checking |
| 950 | * for data in the buffer. Note that it intentionally does not update timeouts, |
| 951 | * so that we can still check them later at wake-up. |
| 952 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 953 | static void stream_int_chk_snd_conn(struct stream_interface *si) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 954 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 955 | struct channel *ob = si->ob; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 956 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 957 | |
Willy Tarreau | 34ffd77 | 2012-09-03 16:51:27 +0200 | [diff] [blame] | 958 | if (unlikely(si->state > SI_ST_EST || (ob->flags & CF_SHUTW))) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 959 | return; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 960 | |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 961 | if (unlikely(channel_is_empty(ob))) /* called with nothing to send ! */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 962 | return; |
| 963 | |
| 964 | if (!ob->pipe && /* spliced data wants to be forwarded ASAP */ |
Willy Tarreau | b016587 | 2012-12-15 10:12:39 +0100 | [diff] [blame] | 965 | !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 966 | return; |
| 967 | |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 968 | 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] | 969 | /* already subscribed to write notifications, will be called |
| 970 | * anyway, so let's avoid calling it especially if the reader |
| 971 | * is not ready. |
| 972 | */ |
| 973 | return; |
| 974 | } |
| 975 | |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 976 | if (!(conn->flags & (CO_FL_HANDSHAKE|CO_FL_WAIT_L4_CONN|CO_FL_WAIT_L6_CONN))) { |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 977 | /* Before calling the data-level operations, we have to prepare |
| 978 | * the polling flags to ensure we properly detect changes. |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 979 | */ |
Willy Tarreau | d02cdd2 | 2013-12-15 10:23:20 +0100 | [diff] [blame] | 980 | if (conn_ctrl_ready(conn)) |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 981 | fd_want_send(conn->t.sock.fd); |
Willy Tarreau | 7d28149 | 2012-12-16 19:19:13 +0100 | [diff] [blame] | 982 | |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 983 | conn_refresh_polling_flags(conn); |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 984 | |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 985 | si_conn_send(conn); |
Willy Tarreau | d02cdd2 | 2013-12-15 10:23:20 +0100 | [diff] [blame] | 986 | if (conn_ctrl_ready(conn) && (conn->flags & CO_FL_ERROR)) { |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 987 | /* Write error on the file descriptor */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 988 | fd_stop_both(conn->t.sock.fd); |
| 989 | __conn_data_stop_both(conn); |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 990 | si->flags |= SI_FL_ERR; |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 991 | goto out_wakeup; |
| 992 | } |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 993 | } |
| 994 | |
| 995 | /* OK, so now we know that some data might have been sent, and that we may |
| 996 | * have to poll first. We have to do that too if the buffer is not empty. |
| 997 | */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 998 | if (channel_is_empty(ob)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 999 | /* the connection is established but we can't write. Either the |
| 1000 | * buffer is empty, or we just refrain from sending because the |
| 1001 | * ->o limit was reached. Maybe we just wrote the last |
| 1002 | * chunk and need to close. |
| 1003 | */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1004 | __conn_data_stop_send(conn); |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 1005 | if (((ob->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) == |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1006 | (CF_AUTO_CLOSE|CF_SHUTW_NOW)) && |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1007 | (si->state == SI_ST_EST)) { |
| 1008 | si_shutw(si); |
| 1009 | goto out_wakeup; |
| 1010 | } |
| 1011 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 1012 | if ((ob->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1013 | si->flags |= SI_FL_WAIT_DATA; |
| 1014 | ob->wex = TICK_ETERNITY; |
| 1015 | } |
| 1016 | else { |
| 1017 | /* Otherwise there are remaining data to be sent in the buffer, |
| 1018 | * which means we have to poll before doing so. |
| 1019 | */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1020 | __conn_data_want_send(conn); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1021 | si->flags &= ~SI_FL_WAIT_DATA; |
| 1022 | if (!tick_isset(ob->wex)) |
| 1023 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 1024 | } |
| 1025 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1026 | if (likely(ob->flags & CF_WRITE_ACTIVITY)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1027 | /* update timeout if we have written something */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1028 | if ((ob->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 1029 | !channel_is_empty(ob)) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1030 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 1031 | |
| 1032 | if (tick_isset(si->ib->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
| 1033 | /* Note: to prevent the client from expiring read timeouts |
| 1034 | * during writes, we refresh it. We only do this if the |
| 1035 | * interface is not configured for "independent streams", |
| 1036 | * because for some applications it's better not to do this, |
| 1037 | * for instance when continuously exchanging small amounts |
| 1038 | * of data which can full the socket buffers long before a |
| 1039 | * write timeout is detected. |
| 1040 | */ |
| 1041 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
| 1042 | } |
| 1043 | } |
| 1044 | |
| 1045 | /* in case of special condition (error, shutdown, end of write...), we |
| 1046 | * have to notify the task. |
| 1047 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1048 | if (likely((ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) || |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 1049 | (channel_is_empty(ob) && !ob->to_forward) || |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1050 | si->state != SI_ST_EST)) { |
| 1051 | out_wakeup: |
| 1052 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 1053 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 1054 | } |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 1055 | |
| 1056 | /* commit possible polling changes */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1057 | conn_cond_update_polling(conn); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1058 | } |
| 1059 | |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1060 | /* |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1061 | * 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] | 1062 | * into the buffer from the connection. It iterates over the transport layer's |
| 1063 | * rcv_buf function. |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1064 | */ |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 1065 | static void si_conn_recv_cb(struct connection *conn) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1066 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 1067 | struct stream_interface *si = conn->owner; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1068 | struct channel *chn = si->ib; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1069 | int ret, max, cur_read; |
| 1070 | int read_poll = MAX_READ_POLL_LOOPS; |
| 1071 | |
| 1072 | /* stop immediately on errors. Note that we DON'T want to stop on |
| 1073 | * POLL_ERR, as the poller might report a write error while there |
| 1074 | * are still data available in the recv buffer. This typically |
| 1075 | * happens when we send too large a request to a backend server |
| 1076 | * which rejects it before reading it all. |
| 1077 | */ |
| 1078 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1079 | return; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1080 | |
| 1081 | /* stop here if we reached the end of data */ |
| 1082 | if (conn_data_read0_pending(conn)) |
| 1083 | goto out_shutdown_r; |
| 1084 | |
| 1085 | /* maybe we were called immediately after an asynchronous shutr */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1086 | if (chn->flags & CF_SHUTR) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1087 | return; |
| 1088 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1089 | cur_read = 0; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1090 | |
| 1091 | /* First, let's see if we may splice data across the channel without |
| 1092 | * using a buffer. |
| 1093 | */ |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 1094 | if (conn->xprt->rcv_pipe && |
Willy Tarreau | fa8e2bc | 2013-07-18 22:21:54 +0200 | [diff] [blame] | 1095 | (chn->pipe || chn->to_forward >= MIN_SPLICE_FORWARD) && |
| 1096 | chn->flags & CF_KERN_SPLICING) { |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1097 | if (buffer_not_empty(chn->buf)) { |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1098 | /* We're embarrassed, there are already data pending in |
| 1099 | * the buffer and we don't want to have them at two |
| 1100 | * locations at a time. Let's indicate we need some |
| 1101 | * place and ask the consumer to hurry. |
| 1102 | */ |
| 1103 | goto abort_splice; |
| 1104 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1105 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1106 | if (unlikely(chn->pipe == NULL)) { |
| 1107 | if (pipes_used >= global.maxpipes || !(chn->pipe = get_pipe())) { |
| 1108 | chn->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1109 | goto abort_splice; |
| 1110 | } |
| 1111 | } |
| 1112 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1113 | ret = conn->xprt->rcv_pipe(conn, chn->pipe, chn->to_forward); |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1114 | if (ret < 0) { |
| 1115 | /* splice not supported on this end, let's disable it */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1116 | chn->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1117 | goto abort_splice; |
| 1118 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1119 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1120 | if (ret > 0) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1121 | if (chn->to_forward != CHN_INFINITE_FORWARD) |
| 1122 | chn->to_forward -= ret; |
| 1123 | chn->total += ret; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1124 | cur_read += ret; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1125 | chn->flags |= CF_READ_PARTIAL; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1126 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1127 | |
| 1128 | if (conn_data_read0_pending(conn)) |
| 1129 | goto out_shutdown_r; |
| 1130 | |
| 1131 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1132 | return; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1133 | |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1134 | if (conn->flags & CO_FL_WAIT_ROOM) { |
| 1135 | /* the pipe is full or we have read enough data that it |
| 1136 | * could soon be full. Let's stop before needing to poll. |
| 1137 | */ |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1138 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1139 | __conn_data_stop_recv(conn); |
| 1140 | } |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1141 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1142 | /* splice not possible (anymore), let's go on on standard copy */ |
| 1143 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1144 | |
| 1145 | abort_splice: |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1146 | if (chn->pipe && unlikely(!chn->pipe->data)) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1147 | put_pipe(chn->pipe); |
| 1148 | chn->pipe = NULL; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1149 | } |
| 1150 | |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1151 | /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling |
| 1152 | * was enabled, which implies that the recv buffer was not full. So we have a guarantee |
| 1153 | * that if such an event is not handled above in splice, it will be handled here by |
| 1154 | * recv(). |
| 1155 | */ |
| 1156 | while (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_DATA_RD_SH | CO_FL_WAIT_RD | CO_FL_WAIT_ROOM | CO_FL_HANDSHAKE))) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1157 | max = bi_avail(chn); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1158 | |
| 1159 | if (!max) { |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1160 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1161 | break; |
| 1162 | } |
| 1163 | |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1164 | ret = conn->xprt->rcv_buf(conn, chn->buf, max); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1165 | if (ret <= 0) |
| 1166 | break; |
| 1167 | |
| 1168 | cur_read += ret; |
| 1169 | |
| 1170 | /* if we're allowed to directly forward data, we must update ->o */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1171 | if (chn->to_forward && !(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1172 | unsigned long fwd = ret; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1173 | if (chn->to_forward != CHN_INFINITE_FORWARD) { |
| 1174 | if (fwd > chn->to_forward) |
| 1175 | fwd = chn->to_forward; |
| 1176 | chn->to_forward -= fwd; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1177 | } |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1178 | b_adv(chn->buf, fwd); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1179 | } |
| 1180 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1181 | chn->flags |= CF_READ_PARTIAL; |
| 1182 | chn->total += ret; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1183 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1184 | if (channel_full(chn)) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1185 | /* The buffer is now full, there's no point in going through |
| 1186 | * the loop again. |
| 1187 | */ |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1188 | if (!(chn->flags & CF_STREAMER_FAST) && (cur_read == buffer_len(chn->buf))) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1189 | chn->xfer_small = 0; |
| 1190 | chn->xfer_large++; |
| 1191 | if (chn->xfer_large >= 3) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1192 | /* we call this buffer a fast streamer if it manages |
| 1193 | * to be filled in one call 3 consecutive times. |
| 1194 | */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1195 | chn->flags |= (CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1196 | //fputc('+', stderr); |
| 1197 | } |
| 1198 | } |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1199 | else if ((chn->flags & (CF_STREAMER | CF_STREAMER_FAST)) && |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1200 | (cur_read <= chn->buf->size / 2)) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1201 | chn->xfer_large = 0; |
| 1202 | chn->xfer_small++; |
| 1203 | if (chn->xfer_small >= 2) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1204 | /* if the buffer has been at least half full twice, |
| 1205 | * we receive faster than we send, so at least it |
| 1206 | * is not a "fast streamer". |
| 1207 | */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1208 | chn->flags &= ~CF_STREAMER_FAST; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1209 | //fputc('-', stderr); |
| 1210 | } |
| 1211 | } |
| 1212 | else { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1213 | chn->xfer_small = 0; |
| 1214 | chn->xfer_large = 0; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1215 | } |
| 1216 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1217 | si->flags |= SI_FL_WAIT_ROOM; |
| 1218 | break; |
| 1219 | } |
| 1220 | |
Willy Tarreau | 5fddab0 | 2012-11-09 18:27:26 +0100 | [diff] [blame] | 1221 | if ((chn->flags & CF_READ_DONTWAIT) || --read_poll <= 0) { |
Willy Tarreau | 34ac566 | 2012-12-19 18:01:02 +0100 | [diff] [blame] | 1222 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | d486ef5 | 2012-12-10 17:03:52 +0100 | [diff] [blame] | 1223 | __conn_data_stop_recv(conn); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1224 | break; |
Willy Tarreau | 5fddab0 | 2012-11-09 18:27:26 +0100 | [diff] [blame] | 1225 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1226 | |
| 1227 | /* if too many bytes were missing from last read, it means that |
| 1228 | * it's pointless trying to read again because the system does |
| 1229 | * not have them in buffers. |
| 1230 | */ |
| 1231 | if (ret < max) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1232 | if ((chn->flags & (CF_STREAMER | CF_STREAMER_FAST)) && |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1233 | (cur_read <= chn->buf->size / 2)) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1234 | chn->xfer_large = 0; |
| 1235 | chn->xfer_small++; |
| 1236 | if (chn->xfer_small >= 3) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1237 | /* we have read less than half of the buffer in |
| 1238 | * one pass, and this happened at least 3 times. |
| 1239 | * This is definitely not a streamer. |
| 1240 | */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1241 | chn->flags &= ~(CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1242 | //fputc('!', stderr); |
| 1243 | } |
| 1244 | } |
| 1245 | |
| 1246 | /* if a streamer has read few data, it may be because we |
| 1247 | * have exhausted system buffers. It's not worth trying |
| 1248 | * again. |
| 1249 | */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1250 | if (chn->flags & CF_STREAMER) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1251 | break; |
| 1252 | |
| 1253 | /* if we read a large block smaller than what we requested, |
| 1254 | * it's almost certain we'll never get anything more. |
| 1255 | */ |
| 1256 | if (ret >= global.tune.recv_enough) |
| 1257 | break; |
| 1258 | } |
| 1259 | } /* while !flags */ |
| 1260 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1261 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1262 | return; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1263 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1264 | if (conn_data_read0_pending(conn)) |
| 1265 | /* connection closed */ |
| 1266 | goto out_shutdown_r; |
| 1267 | |
| 1268 | return; |
| 1269 | |
| 1270 | out_shutdown_r: |
| 1271 | /* we received a shutdown */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1272 | chn->flags |= CF_READ_NULL; |
| 1273 | if (chn->flags & CF_AUTO_CLOSE) |
| 1274 | channel_shutw_now(chn); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1275 | stream_sock_read0(si); |
| 1276 | conn_data_read0(conn); |
| 1277 | return; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1278 | } |
| 1279 | |
| 1280 | /* |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1281 | * 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] | 1282 | * from the buffer to the connection. It iterates over the transport layer's |
| 1283 | * snd_buf function. |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1284 | */ |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 1285 | static void si_conn_send_cb(struct connection *conn) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1286 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 1287 | struct stream_interface *si = conn->owner; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1288 | struct channel *chn = si->ob; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1289 | |
| 1290 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1291 | return; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1292 | |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1293 | if (conn->flags & CO_FL_HANDSHAKE) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1294 | /* a handshake was requested */ |
| 1295 | return; |
| 1296 | |
| 1297 | /* we might have been called just after an asynchronous shutw */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1298 | if (chn->flags & CF_SHUTW) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1299 | return; |
| 1300 | |
| 1301 | /* OK there are data waiting to be sent */ |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1302 | si_conn_send(conn); |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1303 | |
| 1304 | /* OK all done */ |
| 1305 | return; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1306 | } |
| 1307 | |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1308 | /* |
| 1309 | * This function propagates a null read received on a socket-based connection. |
| 1310 | * It updates the stream interface. If the stream interface has SI_FL_NOHALF, |
| 1311 | * the close is also forwarded to the write side as an abort. This function is |
| 1312 | * still socket-specific as it handles a setsockopt() call to set the SO_LINGER |
| 1313 | * state on the socket. |
| 1314 | */ |
| 1315 | void stream_sock_read0(struct stream_interface *si) |
| 1316 | { |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1317 | struct connection *conn = __objt_conn(si->end); |
| 1318 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1319 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 1320 | if (si->ib->flags & CF_SHUTR) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1321 | return; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1322 | si->ib->flags |= CF_SHUTR; |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1323 | si->ib->rex = TICK_ETERNITY; |
| 1324 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 1325 | |
| 1326 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
| 1327 | return; |
| 1328 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1329 | if (si->ob->flags & CF_SHUTW) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1330 | goto do_close; |
| 1331 | |
| 1332 | if (si->flags & SI_FL_NOHALF) { |
| 1333 | /* we want to immediately forward this close to the write side */ |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1334 | /* force flag on ssl to keep session in cache */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1335 | if (conn->xprt->shutw) |
| 1336 | conn->xprt->shutw(conn, 0); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1337 | goto do_close; |
| 1338 | } |
| 1339 | |
| 1340 | /* otherwise that's just a normal read shutdown */ |
Willy Tarreau | ad38ace | 2013-12-15 14:19:38 +0100 | [diff] [blame] | 1341 | if (conn_ctrl_ready(conn)) |
| 1342 | fdtab[conn->t.sock.fd].linger_risk = 0; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1343 | __conn_data_stop_recv(conn); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1344 | return; |
| 1345 | |
| 1346 | do_close: |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1347 | /* 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] | 1348 | conn_full_close(conn); |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1349 | |
| 1350 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 1351 | si->ib->flags |= CF_SHUTR; |
| 1352 | si->ib->rex = TICK_ETERNITY; |
| 1353 | |
| 1354 | si->ob->flags &= ~CF_SHUTW_NOW; |
| 1355 | si->ob->flags |= CF_SHUTW; |
| 1356 | si->ob->wex = TICK_ETERNITY; |
| 1357 | |
| 1358 | si->flags &= ~(SI_FL_WAIT_DATA | SI_FL_WAIT_ROOM); |
| 1359 | |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1360 | si->state = SI_ST_DIS; |
| 1361 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1362 | return; |
| 1363 | } |
| 1364 | |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 1365 | /* |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 1366 | * Local variables: |
| 1367 | * c-indent-level: 8 |
| 1368 | * c-basic-offset: 8 |
| 1369 | * End: |
| 1370 | */ |