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 | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 52 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 53 | /* stream-interface operations for embedded tasks */ |
| 54 | struct si_ops si_embedded_ops = { |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 55 | .update = stream_int_update_embedded, |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 56 | .chk_rcv = stream_int_chk_rcv, |
| 57 | .chk_snd = stream_int_chk_snd, |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 58 | .shutr = stream_int_shutr, |
| 59 | .shutw = stream_int_shutw, |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 60 | }; |
| 61 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 62 | /* stream-interface operations for connections */ |
| 63 | struct si_ops si_conn_ops = { |
| 64 | .update = stream_int_update_conn, |
| 65 | .chk_rcv = stream_int_chk_rcv_conn, |
| 66 | .chk_snd = stream_int_chk_snd_conn, |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 67 | .shutr = stream_int_shutr_conn, |
| 68 | .shutw = stream_int_shutw_conn, |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 69 | }; |
| 70 | |
Willy Tarreau | 74beec3 | 2012-10-03 00:41:04 +0200 | [diff] [blame] | 71 | struct data_cb si_conn_cb = { |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 72 | .recv = si_conn_recv_cb, |
| 73 | .send = si_conn_send_cb, |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 74 | .wake = si_conn_wake_cb, |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 75 | }; |
| 76 | |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 77 | /* |
| 78 | * This function only has to be called once after a wakeup event in case of |
| 79 | * suspected timeout. It controls the stream interface timeouts and sets |
| 80 | * si->flags accordingly. It does NOT close anything, as this timeout may |
| 81 | * be used for any purpose. It returns 1 if the timeout fired, otherwise |
| 82 | * zero. |
| 83 | */ |
| 84 | int stream_int_check_timeouts(struct stream_interface *si) |
| 85 | { |
| 86 | if (tick_is_expired(si->exp, now_ms)) { |
| 87 | si->flags |= SI_FL_EXP; |
| 88 | return 1; |
| 89 | } |
| 90 | return 0; |
| 91 | } |
| 92 | |
Willy Tarreau | fe3718a | 2008-11-30 18:14:12 +0100 | [diff] [blame] | 93 | /* 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] | 94 | void stream_int_report_error(struct stream_interface *si) |
| 95 | { |
| 96 | if (!si->err_type) |
| 97 | si->err_type = SI_ET_DATA_ERR; |
| 98 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 99 | si->ob->flags |= CF_WRITE_ERROR; |
| 100 | si->ib->flags |= CF_READ_ERROR; |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 101 | } |
| 102 | |
| 103 | /* |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 104 | * Returns a message to the client ; the connection is shut down for read, |
| 105 | * and the request is cleared so that no server connection can be initiated. |
| 106 | * The buffer is marked for read shutdown on the other side to protect the |
| 107 | * 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] | 108 | * "chunk". If it is null, then an empty message is used. The reply buffer does |
| 109 | * not need to be empty before this, and its contents will not be overwritten. |
| 110 | * 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] | 111 | */ |
| 112 | void stream_int_retnclose(struct stream_interface *si, const struct chunk *msg) |
| 113 | { |
Willy Tarreau | 8263d2b | 2012-08-28 00:06:31 +0200 | [diff] [blame] | 114 | channel_auto_read(si->ib); |
| 115 | channel_abort(si->ib); |
| 116 | channel_auto_close(si->ib); |
| 117 | channel_erase(si->ib); |
Willy Tarreau | 798e128 | 2010-12-12 13:06:00 +0100 | [diff] [blame] | 118 | |
Willy Tarreau | 9dab5fc | 2012-05-07 11:56:55 +0200 | [diff] [blame] | 119 | bi_erase(si->ob); |
Willy Tarreau | 148d099 | 2010-01-10 10:21:21 +0100 | [diff] [blame] | 120 | if (likely(msg && msg->len)) |
Willy Tarreau | 9dab5fc | 2012-05-07 11:56:55 +0200 | [diff] [blame] | 121 | bo_inject(si->ob, msg->str, msg->len); |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 122 | |
| 123 | si->ob->wex = tick_add_ifset(now_ms, si->ob->wto); |
Willy Tarreau | 8263d2b | 2012-08-28 00:06:31 +0200 | [diff] [blame] | 124 | channel_auto_read(si->ob); |
| 125 | channel_auto_close(si->ob); |
| 126 | channel_shutr_now(si->ob); |
Willy Tarreau | 5d881d0 | 2009-12-27 22:51:06 +0100 | [diff] [blame] | 127 | } |
| 128 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 129 | /* 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] | 130 | static void stream_int_update_embedded(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 131 | { |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 132 | int old_flags = si->flags; |
| 133 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 134 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 135 | __FUNCTION__, |
| 136 | si, si->state, si->ib->flags, si->ob->flags); |
| 137 | |
| 138 | if (si->state != SI_ST_EST) |
| 139 | return; |
| 140 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 141 | if ((si->ob->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW && |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 142 | channel_is_empty(si->ob)) |
Willy Tarreau | 73b013b | 2012-05-21 16:31:45 +0200 | [diff] [blame] | 143 | si_shutw(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 144 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 145 | 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] | 146 | si->flags |= SI_FL_WAIT_DATA; |
| 147 | |
Willy Tarreau | 96fd4b5 | 2009-10-04 17:18:35 +0200 | [diff] [blame] | 148 | /* we're almost sure that we need some space if the buffer is not |
| 149 | * empty, even if it's not full, because the applets can't fill it. |
| 150 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 151 | 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] | 152 | si->flags |= SI_FL_WAIT_ROOM; |
| 153 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 154 | if (si->ob->flags & CF_WRITE_ACTIVITY) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 155 | if (tick_isset(si->ob->wex)) |
| 156 | si->ob->wex = tick_add_ifset(now_ms, si->ob->wto); |
| 157 | } |
| 158 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 159 | if (si->ib->flags & CF_READ_ACTIVITY || |
| 160 | (si->ob->flags & CF_WRITE_ACTIVITY && !(si->flags & SI_FL_INDEP_STR))) { |
Willy Tarreau | f27b5ea | 2009-10-03 22:01:18 +0200 | [diff] [blame] | 161 | if (tick_isset(si->ib->rex)) |
| 162 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
| 163 | } |
| 164 | |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 165 | /* save flags to detect changes */ |
| 166 | old_flags = si->flags; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 167 | 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] | 168 | !channel_full(si->ob) && |
Willy Tarreau | 96fd4b5 | 2009-10-04 17:18:35 +0200 | [diff] [blame] | 169 | (si->ob->prod->flags & SI_FL_WAIT_ROOM))) |
Willy Tarreau | 73b013b | 2012-05-21 16:31:45 +0200 | [diff] [blame] | 170 | si_chk_rcv(si->ob->prod); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 171 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 172 | if (((si->ib->flags & CF_READ_PARTIAL) && !channel_is_empty(si->ib)) && |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 173 | (si->ib->cons->flags & SI_FL_WAIT_DATA)) { |
Willy Tarreau | 73b013b | 2012-05-21 16:31:45 +0200 | [diff] [blame] | 174 | si_chk_snd(si->ib->cons); |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 175 | /* check if the consumer has freed some space */ |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 176 | if (!channel_full(si->ib)) |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 177 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 178 | } |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 179 | |
| 180 | /* Note that we're trying to wake up in two conditions here : |
| 181 | * - special event, which needs the holder task attention |
| 182 | * - status indicating that the applet can go on working. This |
| 183 | * is rather hard because we might be blocking on output and |
| 184 | * 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] | 185 | * to only rely on the changes the chk_* might have performed. |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 186 | */ |
| 187 | if (/* check stream interface changes */ |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 188 | ((old_flags & ~si->flags) & (SI_FL_WAIT_ROOM|SI_FL_WAIT_DATA)) || |
| 189 | |
| 190 | /* changes on the production side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 191 | (si->ib->flags & (CF_READ_NULL|CF_READ_ERROR)) || |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 192 | si->state != SI_ST_EST || |
| 193 | (si->flags & SI_FL_ERR) || |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 194 | ((si->ib->flags & CF_READ_PARTIAL) && |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 195 | (!si->ib->to_forward || si->ib->cons->state != SI_ST_EST)) || |
| 196 | |
| 197 | /* changes on the consumption side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 198 | (si->ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) || |
| 199 | ((si->ob->flags & CF_WRITE_ACTIVITY) && |
| 200 | ((si->ob->flags & CF_SHUTW) || |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 201 | si->ob->prod->state != SI_ST_EST || |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 202 | (channel_is_empty(si->ob) && !si->ob->to_forward)))) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 203 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 204 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 205 | } |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 206 | if (si->ib->flags & CF_READ_ACTIVITY) |
| 207 | si->ib->flags &= ~CF_READ_DONTWAIT; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 208 | } |
| 209 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 210 | /* |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 211 | * This function performs a shutdown-read on a stream interface attached to an |
| 212 | * applet in a connected or init state (it does nothing for other states). It |
| 213 | * either shuts the read side or marks itself as closed. The buffer flags are |
| 214 | * updated to reflect the new state. If the stream interface has SI_FL_NOHALF, |
| 215 | * 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] | 216 | * it exists. |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 217 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 218 | static void stream_int_shutr(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 219 | { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 220 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 221 | if (si->ib->flags & CF_SHUTR) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 222 | return; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 223 | si->ib->flags |= CF_SHUTR; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 224 | si->ib->rex = TICK_ETERNITY; |
| 225 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 226 | |
| 227 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 228 | return; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 229 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 230 | if (si->ob->flags & CF_SHUTW) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 231 | si->state = SI_ST_DIS; |
| 232 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 4a59f2f | 2013-10-24 20:10:45 +0200 | [diff] [blame] | 233 | si_applet_release(si); |
Willy Tarreau | d8ccffe | 2010-09-07 16:16:50 +0200 | [diff] [blame] | 234 | } |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 235 | else if (si->flags & SI_FL_NOHALF) { |
| 236 | /* we want to immediately forward this close to the write side */ |
| 237 | return stream_int_shutw(si); |
| 238 | } |
Willy Tarreau | 0bd05ea | 2010-07-02 11:18:03 +0200 | [diff] [blame] | 239 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 240 | /* 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] | 241 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 242 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 243 | } |
| 244 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 245 | /* |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 246 | * This function performs a shutdown-write on a stream interface attached to an |
| 247 | * applet in a connected or init state (it does nothing for other states). It |
| 248 | * either shuts the write side or marks itself as closed. The buffer flags are |
| 249 | * updated to reflect the new state. It does also close everything if the SI |
| 250 | * 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] | 251 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 252 | static void stream_int_shutw(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 253 | { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 254 | si->ob->flags &= ~CF_SHUTW_NOW; |
| 255 | if (si->ob->flags & CF_SHUTW) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 256 | return; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 257 | si->ob->flags |= CF_SHUTW; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 258 | si->ob->wex = TICK_ETERNITY; |
| 259 | si->flags &= ~SI_FL_WAIT_DATA; |
| 260 | |
| 261 | switch (si->state) { |
| 262 | case SI_ST_EST: |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 263 | /* we have to shut before closing, otherwise some short messages |
| 264 | * may never leave the system, especially when there are remaining |
| 265 | * unread data in the socket input buffer, or when nolinger is set. |
| 266 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 267 | * no risk so we close both sides immediately. |
| 268 | */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 269 | if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) && |
| 270 | !(si->ib->flags & (CF_SHUTR|CF_DONT_READ))) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 271 | return; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 272 | |
| 273 | /* fall through */ |
| 274 | case SI_ST_CON: |
| 275 | case SI_ST_CER: |
Willy Tarreau | 32d3ee9 | 2010-12-29 14:03:02 +0100 | [diff] [blame] | 276 | case SI_ST_QUE: |
| 277 | case SI_ST_TAR: |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 278 | /* Note that none of these states may happen with applets */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 279 | si->state = SI_ST_DIS; |
Willy Tarreau | 4a59f2f | 2013-10-24 20:10:45 +0200 | [diff] [blame] | 280 | si_applet_release(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 281 | default: |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 282 | si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER); |
| 283 | si->ib->flags &= ~CF_SHUTR_NOW; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 284 | si->ib->flags |= CF_SHUTR; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 285 | si->ib->rex = TICK_ETERNITY; |
| 286 | si->exp = TICK_ETERNITY; |
| 287 | } |
| 288 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 289 | /* 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] | 290 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 291 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 292 | } |
| 293 | |
| 294 | /* default chk_rcv function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 295 | static void stream_int_chk_rcv(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 296 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 297 | struct channel *ib = si->ib; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 298 | |
| 299 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 300 | __FUNCTION__, |
| 301 | si, si->state, si->ib->flags, si->ob->flags); |
| 302 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 303 | 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] | 304 | return; |
| 305 | |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 306 | if (channel_full(ib)) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 307 | /* stop reading */ |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 308 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 309 | } |
| 310 | else { |
| 311 | /* (re)start reading */ |
| 312 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 313 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 314 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | /* default chk_snd function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 319 | static void stream_int_chk_snd(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 320 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 321 | struct channel *ob = si->ob; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 322 | |
| 323 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 324 | __FUNCTION__, |
| 325 | si, si->state, si->ib->flags, si->ob->flags); |
| 326 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 327 | if (unlikely(si->state != SI_ST_EST || (si->ob->flags & CF_SHUTW))) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 328 | return; |
| 329 | |
| 330 | if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 331 | channel_is_empty(ob)) /* called with nothing to send ! */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 332 | return; |
| 333 | |
| 334 | /* Otherwise there are remaining data to be sent in the buffer, |
| 335 | * so we tell the handler. |
| 336 | */ |
| 337 | si->flags &= ~SI_FL_WAIT_DATA; |
| 338 | if (!tick_isset(ob->wex)) |
| 339 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 340 | |
| 341 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 342 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 343 | } |
| 344 | |
Willy Tarreau | b24281b | 2011-02-13 13:16:36 +0100 | [diff] [blame] | 345 | /* Register an applet to handle a stream_interface as part of the stream |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 346 | * interface's owner task, which is returned. The SI will wake it up everytime |
Willy Tarreau | b24281b | 2011-02-13 13:16:36 +0100 | [diff] [blame] | 347 | * it is solicited. The task's processing function must call the applet's |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 348 | * function before returning. It must be deleted by the task handler using |
Willy Tarreau | b24281b | 2011-02-13 13:16:36 +0100 | [diff] [blame] | 349 | * stream_int_unregister_handler(), possibly from within the function itself. |
Willy Tarreau | fa6bac6 | 2012-05-31 14:16:59 +0200 | [diff] [blame] | 350 | * It also pre-initializes applet.state to zero and the connection context |
| 351 | * to NULL. |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 352 | */ |
Willy Tarreau | b24281b | 2011-02-13 13:16:36 +0100 | [diff] [blame] | 353 | struct task *stream_int_register_handler(struct stream_interface *si, struct si_applet *app) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 354 | { |
Simon Horman | 7abd00d | 2011-08-13 08:03:51 +0900 | [diff] [blame] | 355 | 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] | 356 | |
Willy Tarreau | 2a6e880 | 2013-10-24 15:50:53 +0200 | [diff] [blame] | 357 | si_attach_applet(si, app); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 358 | si->flags |= SI_FL_WAIT_DATA; |
| 359 | return si->owner; |
| 360 | } |
| 361 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 362 | /* 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] | 363 | * 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] | 364 | */ |
| 365 | void stream_int_unregister_handler(struct stream_interface *si) |
| 366 | { |
Willy Tarreau | 32e3c6a | 2013-10-11 19:34:20 +0200 | [diff] [blame] | 367 | si_detach(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 368 | si->owner = NULL; |
| 369 | } |
| 370 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 371 | /* 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] | 372 | * established. It returns 0 if it fails in a fatal way or needs to poll to go |
| 373 | * 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] | 374 | * flags (the bit is provided in <flag> by the caller). It is designed to be |
| 375 | * 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] | 376 | * Note that it can emit a PROXY line by relying on the other end's address |
| 377 | * when the connection is attached to a stream interface, or by resolving the |
| 378 | * local address otherwise (also called a LOCAL line). |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 379 | */ |
| 380 | int conn_si_send_proxy(struct connection *conn, unsigned int flag) |
| 381 | { |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 382 | /* we might have been called just after an asynchronous shutw */ |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 383 | if (conn->flags & CO_FL_SOCK_WR_SH) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 384 | goto out_error; |
| 385 | |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 386 | if (!(conn->flags & CO_FL_CTRL_READY)) |
| 387 | goto out_error; |
| 388 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 389 | /* If we have a PROXY line to send, we'll use this to validate the |
| 390 | * connection, in which case the connection is validated only once |
| 391 | * we've sent the whole proxy line. Otherwise we use connect(). |
| 392 | */ |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 393 | while (conn->send_proxy_ofs) { |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 394 | int ret; |
| 395 | |
| 396 | /* The target server expects a PROXY line to be sent first. |
| 397 | * If the send_proxy_ofs is negative, it corresponds to the |
| 398 | * offset to start sending from then end of the proxy string |
| 399 | * (which is recomputed every time since it's constant). If |
| 400 | * it is positive, it means we have to send from the start. |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 401 | * We can only send a "normal" PROXY line when the connection |
| 402 | * is attached to a stream interface. Otherwise we can only |
| 403 | * send a LOCAL line (eg: for use with health checks). |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 404 | */ |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 405 | if (conn->data == &si_conn_cb) { |
| 406 | struct stream_interface *si = conn->owner; |
| 407 | struct connection *remote = objt_conn(si->ob->prod->end); |
| 408 | |
| 409 | if (remote) |
| 410 | ret = make_proxy_line(trash.str, trash.size, &remote->addr.from, &remote->addr.to); |
| 411 | else |
| 412 | ret = make_proxy_line(trash.str, trash.size, NULL, NULL); |
| 413 | } |
| 414 | else { |
| 415 | /* The target server expects a LOCAL line to be sent first. Retrieving |
| 416 | * local or remote addresses may fail until the connection is established. |
| 417 | */ |
| 418 | conn_get_from_addr(conn); |
| 419 | if (!(conn->flags & CO_FL_ADDR_FROM_SET)) |
| 420 | goto out_wait; |
| 421 | |
| 422 | conn_get_to_addr(conn); |
| 423 | if (!(conn->flags & CO_FL_ADDR_TO_SET)) |
| 424 | goto out_wait; |
| 425 | |
| 426 | ret = make_proxy_line(trash.str, trash.size, &conn->addr.from, &conn->addr.to); |
| 427 | } |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 428 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 429 | if (!ret) |
| 430 | goto out_error; |
| 431 | |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 432 | if (conn->send_proxy_ofs > 0) |
| 433 | conn->send_proxy_ofs = -ret; /* first call */ |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 434 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 435 | /* we have to send trash from (ret+sp for -sp bytes). If the |
| 436 | * data layer has a pending write, we'll also set MSG_MORE. |
| 437 | */ |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 438 | 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] | 439 | (conn->flags & CO_FL_DATA_WR_ENA) ? MSG_MORE : 0); |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 440 | |
| 441 | if (ret == 0) |
| 442 | goto out_wait; |
| 443 | |
| 444 | if (ret < 0) { |
Willy Tarreau | 95742a4 | 2013-09-03 09:02:11 +0200 | [diff] [blame] | 445 | if (errno == EAGAIN || errno == ENOTCONN) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 446 | goto out_wait; |
Willy Tarreau | 7fe4569 | 2013-12-04 23:37:56 +0100 | [diff] [blame] | 447 | if (errno == EINTR) |
| 448 | continue; |
Willy Tarreau | 26f4a04 | 2013-12-04 23:44:10 +0100 | [diff] [blame] | 449 | conn->flags |= CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 450 | goto out_error; |
| 451 | } |
| 452 | |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 453 | conn->send_proxy_ofs += ret; /* becomes zero once complete */ |
| 454 | if (conn->send_proxy_ofs != 0) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 455 | goto out_wait; |
| 456 | |
| 457 | /* OK we've sent the whole line, we're connected */ |
Willy Tarreau | 7fe4569 | 2013-12-04 23:37:56 +0100 | [diff] [blame] | 458 | break; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 459 | } |
| 460 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 461 | /* The connection is ready now, simply return and let the connection |
| 462 | * handler notify upper layers if needed. |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 463 | */ |
| 464 | if (conn->flags & CO_FL_WAIT_L4_CONN) |
| 465 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 466 | conn->flags &= ~flag; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 467 | return 1; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 468 | |
| 469 | out_error: |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 470 | /* Write error on the file descriptor */ |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 471 | conn->flags |= CO_FL_ERROR; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 472 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 473 | |
| 474 | out_wait: |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 475 | __conn_sock_stop_recv(conn); |
| 476 | __conn_sock_poll_send(conn); |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 477 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 478 | } |
| 479 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 480 | /* 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] | 481 | * 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] | 482 | * 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] | 483 | * an important event requires special handling. It relies on the connection handler |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 484 | * to commit any polling updates. The function always returns 0. |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 485 | */ |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 486 | static int si_conn_wake_cb(struct connection *conn) |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 487 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 488 | struct stream_interface *si = conn->owner; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 489 | |
| 490 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 491 | __FUNCTION__, |
| 492 | si, si->state, si->ib->flags, si->ob->flags); |
| 493 | |
Willy Tarreau | 3c55ec2 | 2012-07-23 19:19:51 +0200 | [diff] [blame] | 494 | if (conn->flags & CO_FL_ERROR) |
| 495 | si->flags |= SI_FL_ERR; |
| 496 | |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 497 | /* check for recent connection establishment */ |
Willy Tarreau | c76ae33 | 2012-07-12 15:32:13 +0200 | [diff] [blame] | 498 | 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] | 499 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 500 | si->ob->flags |= CF_WRITE_NULL; |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 501 | } |
| 502 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 503 | /* process consumer side */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 504 | if (channel_is_empty(si->ob)) { |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 505 | if (((si->ob->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 506 | (si->state == SI_ST_EST)) |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 507 | stream_int_shutw_conn(si); |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 508 | __conn_data_stop_send(conn); |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 509 | si->ob->wex = TICK_ETERNITY; |
| 510 | } |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 511 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 512 | 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] | 513 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 514 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 515 | if (si->ob->flags & CF_WRITE_ACTIVITY) { |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 516 | /* update timeouts if we have written something */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 517 | if ((si->ob->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 518 | !channel_is_empty(si->ob)) |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 519 | if (tick_isset(si->ob->wex)) |
| 520 | si->ob->wex = tick_add_ifset(now_ms, si->ob->wto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 521 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 522 | if (!(si->flags & SI_FL_INDEP_STR)) |
| 523 | if (tick_isset(si->ib->rex)) |
| 524 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 525 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 526 | 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] | 527 | !channel_full(si->ob) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 528 | (si->ob->prod->flags & SI_FL_WAIT_ROOM))) |
| 529 | si_chk_rcv(si->ob->prod); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 530 | } |
| 531 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 532 | /* process producer side. |
| 533 | * We might have some data the consumer is waiting for. |
| 534 | * We can do fast-forwarding, but we avoid doing this for partial |
| 535 | * buffers, because it is very likely that it will be done again |
| 536 | * immediately afterwards once the following data is parsed (eg: |
| 537 | * HTTP chunking). |
| 538 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 539 | if (((si->ib->flags & CF_READ_PARTIAL) && !channel_is_empty(si->ib)) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 540 | (si->ib->pipe /* always try to send spliced data */ || |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 541 | (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] | 542 | int last_len = si->ib->pipe ? si->ib->pipe->data : 0; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 543 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 544 | si_chk_snd(si->ib->cons); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 545 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 546 | /* check if the consumer has freed some space either in the |
| 547 | * buffer or in the pipe. |
| 548 | */ |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 549 | if (!channel_full(si->ib) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 550 | (!last_len || !si->ib->pipe || si->ib->pipe->data < last_len)) |
| 551 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 552 | } |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 553 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 554 | if (si->flags & SI_FL_WAIT_ROOM) { |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 555 | __conn_data_stop_recv(conn); |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 556 | si->ib->rex = TICK_ETERNITY; |
| 557 | } |
Willy Tarreau | 6657276 | 2012-12-19 17:34:17 +0100 | [diff] [blame] | 558 | 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] | 559 | !channel_full(si->ib)) { |
Willy Tarreau | 9f7c6a1 | 2012-11-19 16:43:14 +0100 | [diff] [blame] | 560 | /* we must re-enable reading if si_chk_snd() has freed some space */ |
| 561 | __conn_data_want_recv(conn); |
Willy Tarreau | 6657276 | 2012-12-19 17:34:17 +0100 | [diff] [blame] | 562 | if (!(si->ib->flags & CF_READ_NOEXP) && tick_isset(si->ib->rex)) |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 563 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 564 | } |
| 565 | |
| 566 | /* wake the task up only when needed */ |
| 567 | if (/* changes on the production side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 568 | (si->ib->flags & (CF_READ_NULL|CF_READ_ERROR)) || |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 569 | si->state != SI_ST_EST || |
| 570 | (si->flags & SI_FL_ERR) || |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 571 | ((si->ib->flags & CF_READ_PARTIAL) && |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 572 | (!si->ib->to_forward || si->ib->cons->state != SI_ST_EST)) || |
| 573 | |
| 574 | /* changes on the consumption side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 575 | (si->ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) || |
| 576 | ((si->ob->flags & CF_WRITE_ACTIVITY) && |
| 577 | ((si->ob->flags & CF_SHUTW) || |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 578 | si->ob->prod->state != SI_ST_EST || |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 579 | (channel_is_empty(si->ob) && !si->ob->to_forward)))) { |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 580 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 581 | } |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 582 | if (si->ib->flags & CF_READ_ACTIVITY) |
| 583 | si->ib->flags &= ~CF_READ_DONTWAIT; |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 584 | return 0; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 585 | } |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 586 | |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 587 | /* |
| 588 | * This function is called to send buffer data to a stream socket. |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 589 | * It calls the transport layer's snd_buf function. It relies on the |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 590 | * caller to commit polling changes. The caller should check conn->flags |
| 591 | * for errors. |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 592 | */ |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 593 | static void si_conn_send(struct connection *conn) |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 594 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 595 | struct stream_interface *si = conn->owner; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 596 | struct channel *chn = si->ob; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 597 | int ret; |
| 598 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 599 | if (chn->pipe && conn->xprt->snd_pipe) { |
| 600 | ret = conn->xprt->snd_pipe(conn, chn->pipe); |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 601 | if (ret > 0) |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 602 | chn->flags |= CF_WRITE_PARTIAL; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 603 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 604 | if (!chn->pipe->data) { |
| 605 | put_pipe(chn->pipe); |
| 606 | chn->pipe = NULL; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 607 | } |
| 608 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 609 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 610 | return; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 611 | } |
| 612 | |
| 613 | /* At this point, the pipe is empty, but we may still have data pending |
| 614 | * in the normal buffer. |
| 615 | */ |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 616 | if (!chn->buf->o) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 617 | return; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 618 | |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 619 | /* when we're here, we already know that there is no spliced |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 620 | * data left, and that there are sendable buffered data. |
| 621 | */ |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 622 | 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] | 623 | /* check if we want to inform the kernel that we're interested in |
| 624 | * sending more data after this call. We want this if : |
| 625 | * - we're about to close after this last send and want to merge |
| 626 | * the ongoing FIN with the last segment. |
| 627 | * - we know we can't send everything at once and must get back |
| 628 | * here because of unaligned data |
| 629 | * - there is still a finite amount of data to forward |
| 630 | * The test is arranged so that the most common case does only 2 |
| 631 | * tests. |
| 632 | */ |
| 633 | unsigned int send_flag = MSG_DONTWAIT | MSG_NOSIGNAL; |
| 634 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 635 | if ((!(chn->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) && |
| 636 | ((chn->to_forward && chn->to_forward != CHN_INFINITE_FORWARD) || |
| 637 | (chn->flags & CF_EXPECT_MORE))) || |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 638 | ((chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW)) |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 639 | send_flag |= MSG_MORE; |
| 640 | |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 641 | ret = conn->xprt->snd_buf(conn, chn->buf, send_flag); |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 642 | if (ret > 0) { |
| 643 | chn->flags |= CF_WRITE_PARTIAL; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 644 | |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 645 | if (!chn->buf->o) { |
| 646 | /* Always clear both flags once everything has been sent, they're one-shot */ |
| 647 | chn->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT); |
| 648 | } |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 649 | |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 650 | /* if some data remain in the buffer, it's only because the |
| 651 | * system buffers are full, we will try next time. |
| 652 | */ |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 653 | } |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 654 | } |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 655 | |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 656 | return; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 657 | } |
| 658 | |
| 659 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 660 | /* Updates the timers and flags of a stream interface attached to a connection, |
| 661 | * depending on the buffers' flags. It should only be called once after the |
| 662 | * buffer flags have settled down, and before they are cleared. It doesn't |
| 663 | * harm to call it as often as desired (it just slightly hurts performance). |
| 664 | * It is only meant to be called by upper layers after buffer flags have been |
| 665 | * manipulated by analysers. |
| 666 | */ |
| 667 | void stream_int_update_conn(struct stream_interface *si) |
| 668 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 669 | struct channel *ib = si->ib; |
| 670 | struct channel *ob = si->ob; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 671 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 672 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 673 | /* Check if we need to close the read side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 674 | if (!(ib->flags & CF_SHUTR)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 675 | /* Read not closed, update FD status and timeout for reads */ |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 676 | if ((ib->flags & CF_DONT_READ) || channel_full(ib)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 677 | /* stop reading */ |
| 678 | if (!(si->flags & SI_FL_WAIT_ROOM)) { |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 679 | if (!(ib->flags & CF_DONT_READ)) /* full */ |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 680 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 681 | conn_data_stop_recv(conn); |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 682 | ib->rex = TICK_ETERNITY; |
| 683 | } |
| 684 | } |
| 685 | else { |
| 686 | /* (re)start reading and update timeout. Note: we don't recompute the timeout |
| 687 | * everytime we get here, otherwise it would risk never to expire. We only |
| 688 | * update it if is was not yet set. The stream socket handler will already |
| 689 | * have updated it if there has been a completed I/O. |
| 690 | */ |
| 691 | si->flags &= ~SI_FL_WAIT_ROOM; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 692 | conn_data_want_recv(conn); |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 693 | 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] | 694 | ib->rex = tick_add_ifset(now_ms, ib->rto); |
| 695 | } |
| 696 | } |
| 697 | |
| 698 | /* Check if we need to close the write side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 699 | if (!(ob->flags & CF_SHUTW)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 700 | /* Write not closed, update FD status and timeout for writes */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 701 | if (channel_is_empty(ob)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 702 | /* stop writing */ |
| 703 | if (!(si->flags & SI_FL_WAIT_DATA)) { |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 704 | if ((ob->flags & CF_SHUTW_NOW) == 0) |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 705 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 706 | conn_data_stop_send(conn); |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 707 | ob->wex = TICK_ETERNITY; |
| 708 | } |
| 709 | } |
| 710 | else { |
| 711 | /* (re)start writing and update timeout. Note: we don't recompute the timeout |
| 712 | * everytime we get here, otherwise it would risk never to expire. We only |
| 713 | * update it if is was not yet set. The stream socket handler will already |
| 714 | * have updated it if there has been a completed I/O. |
| 715 | */ |
| 716 | si->flags &= ~SI_FL_WAIT_DATA; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 717 | conn_data_want_send(conn); |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 718 | if (!tick_isset(ob->wex)) { |
| 719 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 720 | if (tick_isset(ib->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
| 721 | /* Note: depending on the protocol, we don't know if we're waiting |
| 722 | * for incoming data or not. So in order to prevent the socket from |
| 723 | * expiring read timeouts during writes, we refresh the read timeout, |
| 724 | * except if it was already infinite or if we have explicitly setup |
| 725 | * independent streams. |
| 726 | */ |
| 727 | ib->rex = tick_add_ifset(now_ms, ib->rto); |
| 728 | } |
| 729 | } |
| 730 | } |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 731 | } |
| 732 | } |
| 733 | |
| 734 | /* |
| 735 | * This function performs a shutdown-read on a stream interface attached to |
| 736 | * a connection in a connected or init state (it does nothing for other |
| 737 | * states). It either shuts the read side or marks itself as closed. The buffer |
| 738 | * flags are updated to reflect the new state. If the stream interface has |
| 739 | * SI_FL_NOHALF, we also forward the close to the write side. If a control |
| 740 | * 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] | 741 | * descriptors are then shutdown or closed accordingly. The function |
| 742 | * automatically disables polling if needed. |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 743 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 744 | static void stream_int_shutr_conn(struct stream_interface *si) |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 745 | { |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 746 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 747 | |
| 748 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 749 | if (si->ib->flags & CF_SHUTR) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 750 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 751 | si->ib->flags |= CF_SHUTR; |
| 752 | si->ib->rex = TICK_ETERNITY; |
| 753 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 754 | |
| 755 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 756 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 757 | |
| 758 | if (si->ob->flags & CF_SHUTW) { |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 759 | conn_full_close(conn); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 760 | si->state = SI_ST_DIS; |
| 761 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 762 | } |
| 763 | else if (si->flags & SI_FL_NOHALF) { |
| 764 | /* we want to immediately forward this close to the write side */ |
| 765 | return stream_int_shutw_conn(si); |
| 766 | } |
| 767 | else if (conn->ctrl) { |
| 768 | /* we want the caller to disable polling on this FD */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 769 | conn_data_stop_recv(conn); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 770 | } |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 771 | } |
| 772 | |
| 773 | /* |
| 774 | * This function performs a shutdown-write on a stream interface attached to |
| 775 | * a connection in a connected or init state (it does nothing for other |
| 776 | * states). It either shuts the write side or marks itself as closed. The |
| 777 | * buffer flags are updated to reflect the new state. It does also close |
| 778 | * everything if the SI was marked as being in error state. If there is a |
| 779 | * data-layer shutdown, it is called. If a control layer is defined, then it is |
| 780 | * 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] | 781 | * closed accordingly. The function automatically disables polling if needed. |
| 782 | * Note: at the moment, we continue to check conn->ctrl eventhough we *know* it |
| 783 | * is valid. This will help selecting the proper shutdown() and setsockopt() |
| 784 | * calls if/when we implement remote sockets later. |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 785 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 786 | static void stream_int_shutw_conn(struct stream_interface *si) |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 787 | { |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 788 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 789 | |
| 790 | si->ob->flags &= ~CF_SHUTW_NOW; |
| 791 | if (si->ob->flags & CF_SHUTW) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 792 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 793 | si->ob->flags |= CF_SHUTW; |
| 794 | si->ob->wex = TICK_ETERNITY; |
| 795 | si->flags &= ~SI_FL_WAIT_DATA; |
| 796 | |
| 797 | switch (si->state) { |
| 798 | case SI_ST_EST: |
| 799 | /* we have to shut before closing, otherwise some short messages |
| 800 | * may never leave the system, especially when there are remaining |
| 801 | * unread data in the socket input buffer, or when nolinger is set. |
| 802 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 803 | * no risk so we close both sides immediately. |
| 804 | */ |
| 805 | if (si->flags & SI_FL_ERR) { |
| 806 | /* quick close, the socket is alredy shut anyway */ |
| 807 | } |
| 808 | else if (si->flags & SI_FL_NOLINGER) { |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 809 | if ((conn->flags & CO_FL_CTRL_READY) && conn->ctrl) { |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 810 | setsockopt(conn->t.sock.fd, SOL_SOCKET, SO_LINGER, |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 811 | (struct linger *) &nolinger, sizeof(struct linger)); |
| 812 | } |
| 813 | /* unclean data-layer shutdown */ |
| 814 | if (conn->xprt && conn->xprt->shutw) |
| 815 | conn->xprt->shutw(conn, 0); |
| 816 | } |
| 817 | else { |
| 818 | /* clean data-layer shutdown */ |
| 819 | if (conn->xprt && conn->xprt->shutw) |
| 820 | conn->xprt->shutw(conn, 1); |
| 821 | |
| 822 | /* If the stream interface is configured to disable half-open |
| 823 | * connections, we'll skip the shutdown(), but only if the |
| 824 | * read size is already closed. Otherwise we can't support |
| 825 | * closed write with pending read (eg: abortonclose while |
| 826 | * waiting for the server). |
| 827 | */ |
| 828 | if (!(si->flags & SI_FL_NOHALF) || !(si->ib->flags & (CF_SHUTR|CF_DONT_READ))) { |
| 829 | /* We shutdown transport layer */ |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 830 | if ((conn->flags & CO_FL_CTRL_READY) && conn->ctrl) |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 831 | shutdown(conn->t.sock.fd, SHUT_WR); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 832 | |
| 833 | if (!(si->ib->flags & (CF_SHUTR|CF_DONT_READ))) { |
| 834 | /* OK just a shutw, but we want the caller |
| 835 | * to disable polling on this FD if exists. |
| 836 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 837 | if (conn->ctrl) |
| 838 | conn_data_stop_send(conn); |
| 839 | return; |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 840 | } |
| 841 | } |
| 842 | } |
| 843 | |
| 844 | /* fall through */ |
| 845 | case SI_ST_CON: |
| 846 | /* we may have to close a pending connection, and mark the |
| 847 | * response buffer as shutr |
| 848 | */ |
Willy Tarreau | 6fe1541 | 2013-09-29 15:16:03 +0200 | [diff] [blame] | 849 | conn_full_close(conn); |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 850 | /* fall through */ |
| 851 | case SI_ST_CER: |
| 852 | case SI_ST_QUE: |
| 853 | case SI_ST_TAR: |
| 854 | si->state = SI_ST_DIS; |
Willy Tarreau | 4a59f2f | 2013-10-24 20:10:45 +0200 | [diff] [blame] | 855 | /* fall through */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame] | 856 | default: |
| 857 | si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER); |
| 858 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 859 | si->ib->flags |= CF_SHUTR; |
| 860 | si->ib->rex = TICK_ETERNITY; |
| 861 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 862 | } |
| 863 | } |
| 864 | |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 865 | /* This function is used for inter-stream-interface calls. It is called by the |
| 866 | * consumer to inform the producer side that it may be interested in checking |
| 867 | * for free space in the buffer. Note that it intentionally does not update |
| 868 | * timeouts, so that we can still check them later at wake-up. This function is |
| 869 | * dedicated to connection-based stream interfaces. |
| 870 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 871 | static void stream_int_chk_rcv_conn(struct stream_interface *si) |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 872 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 873 | struct channel *ib = si->ib; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 874 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 875 | |
Willy Tarreau | 34ffd77 | 2012-09-03 16:51:27 +0200 | [diff] [blame] | 876 | if (unlikely(si->state > SI_ST_EST || (ib->flags & CF_SHUTR))) |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 877 | return; |
| 878 | |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 879 | conn_refresh_polling_flags(conn); |
Willy Tarreau | 7d28149 | 2012-12-16 19:19:13 +0100 | [diff] [blame] | 880 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 881 | if ((ib->flags & CF_DONT_READ) || channel_full(ib)) { |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 882 | /* stop reading */ |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 883 | if (!(ib->flags & CF_DONT_READ)) /* full */ |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 884 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 885 | __conn_data_stop_recv(conn); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 886 | } |
| 887 | else { |
| 888 | /* (re)start reading */ |
| 889 | si->flags &= ~SI_FL_WAIT_ROOM; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 890 | __conn_data_want_recv(conn); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 891 | } |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 892 | conn_cond_update_data_polling(conn); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 893 | } |
| 894 | |
| 895 | |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 896 | /* This function is used for inter-stream-interface calls. It is called by the |
| 897 | * producer to inform the consumer side that it may be interested in checking |
| 898 | * for data in the buffer. Note that it intentionally does not update timeouts, |
| 899 | * so that we can still check them later at wake-up. |
| 900 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 901 | static void stream_int_chk_snd_conn(struct stream_interface *si) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 902 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 903 | struct channel *ob = si->ob; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 904 | struct connection *conn = __objt_conn(si->end); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 905 | |
Willy Tarreau | 34ffd77 | 2012-09-03 16:51:27 +0200 | [diff] [blame] | 906 | if (unlikely(si->state > SI_ST_EST || (ob->flags & CF_SHUTW))) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 907 | return; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 908 | |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 909 | if (unlikely(channel_is_empty(ob))) /* called with nothing to send ! */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 910 | return; |
| 911 | |
| 912 | if (!ob->pipe && /* spliced data wants to be forwarded ASAP */ |
Willy Tarreau | b016587 | 2012-12-15 10:12:39 +0100 | [diff] [blame] | 913 | !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 914 | return; |
| 915 | |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 916 | 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] | 917 | /* already subscribed to write notifications, will be called |
| 918 | * anyway, so let's avoid calling it especially if the reader |
| 919 | * is not ready. |
| 920 | */ |
| 921 | return; |
| 922 | } |
| 923 | |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 924 | 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] | 925 | /* Before calling the data-level operations, we have to prepare |
| 926 | * the polling flags to ensure we properly detect changes. |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 927 | */ |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 928 | if ((conn->flags & CO_FL_CTRL_READY) && conn->ctrl) |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 929 | fd_want_send(conn->t.sock.fd); |
Willy Tarreau | 7d28149 | 2012-12-16 19:19:13 +0100 | [diff] [blame] | 930 | |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 931 | conn_refresh_polling_flags(conn); |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 932 | |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 933 | si_conn_send(conn); |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 934 | if ((conn->flags & CO_FL_CTRL_READY) && (conn->flags & CO_FL_ERROR)) { |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 935 | /* Write error on the file descriptor */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 936 | fd_stop_both(conn->t.sock.fd); |
| 937 | __conn_data_stop_both(conn); |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 938 | si->flags |= SI_FL_ERR; |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 939 | goto out_wakeup; |
| 940 | } |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 941 | } |
| 942 | |
| 943 | /* OK, so now we know that some data might have been sent, and that we may |
| 944 | * have to poll first. We have to do that too if the buffer is not empty. |
| 945 | */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 946 | if (channel_is_empty(ob)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 947 | /* the connection is established but we can't write. Either the |
| 948 | * buffer is empty, or we just refrain from sending because the |
| 949 | * ->o limit was reached. Maybe we just wrote the last |
| 950 | * chunk and need to close. |
| 951 | */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 952 | __conn_data_stop_send(conn); |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 953 | if (((ob->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) == |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 954 | (CF_AUTO_CLOSE|CF_SHUTW_NOW)) && |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 955 | (si->state == SI_ST_EST)) { |
| 956 | si_shutw(si); |
| 957 | goto out_wakeup; |
| 958 | } |
| 959 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 960 | if ((ob->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 961 | si->flags |= SI_FL_WAIT_DATA; |
| 962 | ob->wex = TICK_ETERNITY; |
| 963 | } |
| 964 | else { |
| 965 | /* Otherwise there are remaining data to be sent in the buffer, |
| 966 | * which means we have to poll before doing so. |
| 967 | */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 968 | __conn_data_want_send(conn); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 969 | si->flags &= ~SI_FL_WAIT_DATA; |
| 970 | if (!tick_isset(ob->wex)) |
| 971 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 972 | } |
| 973 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 974 | if (likely(ob->flags & CF_WRITE_ACTIVITY)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 975 | /* update timeout if we have written something */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 976 | if ((ob->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 977 | !channel_is_empty(ob)) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 978 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 979 | |
| 980 | if (tick_isset(si->ib->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
| 981 | /* Note: to prevent the client from expiring read timeouts |
| 982 | * during writes, we refresh it. We only do this if the |
| 983 | * interface is not configured for "independent streams", |
| 984 | * because for some applications it's better not to do this, |
| 985 | * for instance when continuously exchanging small amounts |
| 986 | * of data which can full the socket buffers long before a |
| 987 | * write timeout is detected. |
| 988 | */ |
| 989 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
| 990 | } |
| 991 | } |
| 992 | |
| 993 | /* in case of special condition (error, shutdown, end of write...), we |
| 994 | * have to notify the task. |
| 995 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 996 | if (likely((ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) || |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 997 | (channel_is_empty(ob) && !ob->to_forward) || |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 998 | si->state != SI_ST_EST)) { |
| 999 | out_wakeup: |
| 1000 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 1001 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 1002 | } |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 1003 | |
| 1004 | /* commit possible polling changes */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1005 | conn_cond_update_polling(conn); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 1006 | } |
| 1007 | |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1008 | /* |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1009 | * 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] | 1010 | * into the buffer from the connection. It iterates over the transport layer's |
| 1011 | * rcv_buf function. |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1012 | */ |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 1013 | static void si_conn_recv_cb(struct connection *conn) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1014 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 1015 | struct stream_interface *si = conn->owner; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1016 | struct channel *chn = si->ib; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1017 | int ret, max, cur_read; |
| 1018 | int read_poll = MAX_READ_POLL_LOOPS; |
| 1019 | |
| 1020 | /* stop immediately on errors. Note that we DON'T want to stop on |
| 1021 | * POLL_ERR, as the poller might report a write error while there |
| 1022 | * are still data available in the recv buffer. This typically |
| 1023 | * happens when we send too large a request to a backend server |
| 1024 | * which rejects it before reading it all. |
| 1025 | */ |
| 1026 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1027 | return; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1028 | |
| 1029 | /* stop here if we reached the end of data */ |
| 1030 | if (conn_data_read0_pending(conn)) |
| 1031 | goto out_shutdown_r; |
| 1032 | |
| 1033 | /* maybe we were called immediately after an asynchronous shutr */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1034 | if (chn->flags & CF_SHUTR) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1035 | return; |
| 1036 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1037 | cur_read = 0; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1038 | |
| 1039 | /* First, let's see if we may splice data across the channel without |
| 1040 | * using a buffer. |
| 1041 | */ |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 1042 | if (conn->xprt->rcv_pipe && |
Willy Tarreau | fa8e2bc | 2013-07-18 22:21:54 +0200 | [diff] [blame] | 1043 | (chn->pipe || chn->to_forward >= MIN_SPLICE_FORWARD) && |
| 1044 | chn->flags & CF_KERN_SPLICING) { |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1045 | if (buffer_not_empty(chn->buf)) { |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1046 | /* We're embarrassed, there are already data pending in |
| 1047 | * the buffer and we don't want to have them at two |
| 1048 | * locations at a time. Let's indicate we need some |
| 1049 | * place and ask the consumer to hurry. |
| 1050 | */ |
| 1051 | goto abort_splice; |
| 1052 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1053 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1054 | if (unlikely(chn->pipe == NULL)) { |
| 1055 | if (pipes_used >= global.maxpipes || !(chn->pipe = get_pipe())) { |
| 1056 | chn->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1057 | goto abort_splice; |
| 1058 | } |
| 1059 | } |
| 1060 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1061 | ret = conn->xprt->rcv_pipe(conn, chn->pipe, chn->to_forward); |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1062 | if (ret < 0) { |
| 1063 | /* splice not supported on this end, let's disable it */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1064 | chn->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1065 | goto abort_splice; |
| 1066 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1067 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1068 | if (ret > 0) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1069 | if (chn->to_forward != CHN_INFINITE_FORWARD) |
| 1070 | chn->to_forward -= ret; |
| 1071 | chn->total += ret; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1072 | cur_read += ret; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1073 | chn->flags |= CF_READ_PARTIAL; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1074 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1075 | |
| 1076 | if (conn_data_read0_pending(conn)) |
| 1077 | goto out_shutdown_r; |
| 1078 | |
| 1079 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1080 | return; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1081 | |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1082 | if (conn->flags & CO_FL_WAIT_ROOM) { |
| 1083 | /* the pipe is full or we have read enough data that it |
| 1084 | * could soon be full. Let's stop before needing to poll. |
| 1085 | */ |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1086 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1087 | __conn_data_stop_recv(conn); |
| 1088 | } |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1089 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1090 | /* splice not possible (anymore), let's go on on standard copy */ |
| 1091 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1092 | |
| 1093 | abort_splice: |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1094 | if (chn->pipe && unlikely(!chn->pipe->data)) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1095 | put_pipe(chn->pipe); |
| 1096 | chn->pipe = NULL; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1097 | } |
| 1098 | |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1099 | /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling |
| 1100 | * was enabled, which implies that the recv buffer was not full. So we have a guarantee |
| 1101 | * that if such an event is not handled above in splice, it will be handled here by |
| 1102 | * recv(). |
| 1103 | */ |
| 1104 | 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] | 1105 | max = bi_avail(chn); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1106 | |
| 1107 | if (!max) { |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1108 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1109 | break; |
| 1110 | } |
| 1111 | |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1112 | ret = conn->xprt->rcv_buf(conn, chn->buf, max); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1113 | if (ret <= 0) |
| 1114 | break; |
| 1115 | |
| 1116 | cur_read += ret; |
| 1117 | |
| 1118 | /* if we're allowed to directly forward data, we must update ->o */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1119 | if (chn->to_forward && !(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1120 | unsigned long fwd = ret; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1121 | if (chn->to_forward != CHN_INFINITE_FORWARD) { |
| 1122 | if (fwd > chn->to_forward) |
| 1123 | fwd = chn->to_forward; |
| 1124 | chn->to_forward -= fwd; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1125 | } |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1126 | b_adv(chn->buf, fwd); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1127 | } |
| 1128 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1129 | chn->flags |= CF_READ_PARTIAL; |
| 1130 | chn->total += ret; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1131 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1132 | if (channel_full(chn)) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1133 | /* The buffer is now full, there's no point in going through |
| 1134 | * the loop again. |
| 1135 | */ |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1136 | if (!(chn->flags & CF_STREAMER_FAST) && (cur_read == buffer_len(chn->buf))) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1137 | chn->xfer_small = 0; |
| 1138 | chn->xfer_large++; |
| 1139 | if (chn->xfer_large >= 3) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1140 | /* we call this buffer a fast streamer if it manages |
| 1141 | * to be filled in one call 3 consecutive times. |
| 1142 | */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1143 | chn->flags |= (CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1144 | //fputc('+', stderr); |
| 1145 | } |
| 1146 | } |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1147 | else if ((chn->flags & (CF_STREAMER | CF_STREAMER_FAST)) && |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1148 | (cur_read <= chn->buf->size / 2)) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1149 | chn->xfer_large = 0; |
| 1150 | chn->xfer_small++; |
| 1151 | if (chn->xfer_small >= 2) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1152 | /* if the buffer has been at least half full twice, |
| 1153 | * we receive faster than we send, so at least it |
| 1154 | * is not a "fast streamer". |
| 1155 | */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1156 | chn->flags &= ~CF_STREAMER_FAST; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1157 | //fputc('-', stderr); |
| 1158 | } |
| 1159 | } |
| 1160 | else { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1161 | chn->xfer_small = 0; |
| 1162 | chn->xfer_large = 0; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1163 | } |
| 1164 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1165 | si->flags |= SI_FL_WAIT_ROOM; |
| 1166 | break; |
| 1167 | } |
| 1168 | |
Willy Tarreau | 5fddab0 | 2012-11-09 18:27:26 +0100 | [diff] [blame] | 1169 | if ((chn->flags & CF_READ_DONTWAIT) || --read_poll <= 0) { |
Willy Tarreau | 34ac566 | 2012-12-19 18:01:02 +0100 | [diff] [blame] | 1170 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | d486ef5 | 2012-12-10 17:03:52 +0100 | [diff] [blame] | 1171 | __conn_data_stop_recv(conn); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1172 | break; |
Willy Tarreau | 5fddab0 | 2012-11-09 18:27:26 +0100 | [diff] [blame] | 1173 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1174 | |
| 1175 | /* if too many bytes were missing from last read, it means that |
| 1176 | * it's pointless trying to read again because the system does |
| 1177 | * not have them in buffers. |
| 1178 | */ |
| 1179 | if (ret < max) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1180 | if ((chn->flags & (CF_STREAMER | CF_STREAMER_FAST)) && |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1181 | (cur_read <= chn->buf->size / 2)) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1182 | chn->xfer_large = 0; |
| 1183 | chn->xfer_small++; |
| 1184 | if (chn->xfer_small >= 3) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1185 | /* we have read less than half of the buffer in |
| 1186 | * one pass, and this happened at least 3 times. |
| 1187 | * This is definitely not a streamer. |
| 1188 | */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1189 | chn->flags &= ~(CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1190 | //fputc('!', stderr); |
| 1191 | } |
| 1192 | } |
| 1193 | |
| 1194 | /* if a streamer has read few data, it may be because we |
| 1195 | * have exhausted system buffers. It's not worth trying |
| 1196 | * again. |
| 1197 | */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1198 | if (chn->flags & CF_STREAMER) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1199 | break; |
| 1200 | |
| 1201 | /* if we read a large block smaller than what we requested, |
| 1202 | * it's almost certain we'll never get anything more. |
| 1203 | */ |
| 1204 | if (ret >= global.tune.recv_enough) |
| 1205 | break; |
| 1206 | } |
| 1207 | } /* while !flags */ |
| 1208 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1209 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1210 | return; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1211 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1212 | if (conn_data_read0_pending(conn)) |
| 1213 | /* connection closed */ |
| 1214 | goto out_shutdown_r; |
| 1215 | |
| 1216 | return; |
| 1217 | |
| 1218 | out_shutdown_r: |
| 1219 | /* we received a shutdown */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1220 | chn->flags |= CF_READ_NULL; |
| 1221 | if (chn->flags & CF_AUTO_CLOSE) |
| 1222 | channel_shutw_now(chn); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1223 | stream_sock_read0(si); |
| 1224 | conn_data_read0(conn); |
| 1225 | return; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1226 | } |
| 1227 | |
| 1228 | /* |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1229 | * 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] | 1230 | * from the buffer to the connection. It iterates over the transport layer's |
| 1231 | * snd_buf function. |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1232 | */ |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 1233 | static void si_conn_send_cb(struct connection *conn) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1234 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 1235 | struct stream_interface *si = conn->owner; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1236 | struct channel *chn = si->ob; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1237 | |
| 1238 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1239 | return; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1240 | |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1241 | if (conn->flags & CO_FL_HANDSHAKE) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1242 | /* a handshake was requested */ |
| 1243 | return; |
| 1244 | |
| 1245 | /* we might have been called just after an asynchronous shutw */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1246 | if (chn->flags & CF_SHUTW) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1247 | return; |
| 1248 | |
| 1249 | /* OK there are data waiting to be sent */ |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1250 | si_conn_send(conn); |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1251 | |
| 1252 | /* OK all done */ |
| 1253 | return; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1254 | } |
| 1255 | |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1256 | /* |
| 1257 | * This function propagates a null read received on a socket-based connection. |
| 1258 | * It updates the stream interface. If the stream interface has SI_FL_NOHALF, |
| 1259 | * the close is also forwarded to the write side as an abort. This function is |
| 1260 | * still socket-specific as it handles a setsockopt() call to set the SO_LINGER |
| 1261 | * state on the socket. |
| 1262 | */ |
| 1263 | void stream_sock_read0(struct stream_interface *si) |
| 1264 | { |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1265 | struct connection *conn = __objt_conn(si->end); |
| 1266 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1267 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 1268 | if (si->ib->flags & CF_SHUTR) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1269 | return; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1270 | si->ib->flags |= CF_SHUTR; |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1271 | si->ib->rex = TICK_ETERNITY; |
| 1272 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 1273 | |
| 1274 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
| 1275 | return; |
| 1276 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1277 | if (si->ob->flags & CF_SHUTW) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1278 | goto do_close; |
| 1279 | |
| 1280 | if (si->flags & SI_FL_NOHALF) { |
| 1281 | /* we want to immediately forward this close to the write side */ |
| 1282 | if (si->flags & SI_FL_NOLINGER) { |
| 1283 | si->flags &= ~SI_FL_NOLINGER; |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 1284 | if (conn->flags & CO_FL_CTRL_READY) |
| 1285 | setsockopt(conn->t.sock.fd, SOL_SOCKET, SO_LINGER, |
| 1286 | (struct linger *) &nolinger, sizeof(struct linger)); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1287 | } |
| 1288 | /* force flag on ssl to keep session in cache */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1289 | if (conn->xprt->shutw) |
| 1290 | conn->xprt->shutw(conn, 0); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1291 | goto do_close; |
| 1292 | } |
| 1293 | |
| 1294 | /* otherwise that's just a normal read shutdown */ |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1295 | __conn_data_stop_recv(conn); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1296 | return; |
| 1297 | |
| 1298 | do_close: |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1299 | /* 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] | 1300 | conn_full_close(conn); |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1301 | |
| 1302 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 1303 | si->ib->flags |= CF_SHUTR; |
| 1304 | si->ib->rex = TICK_ETERNITY; |
| 1305 | |
| 1306 | si->ob->flags &= ~CF_SHUTW_NOW; |
| 1307 | si->ob->flags |= CF_SHUTW; |
| 1308 | si->ob->wex = TICK_ETERNITY; |
| 1309 | |
| 1310 | si->flags &= ~(SI_FL_WAIT_DATA | SI_FL_WAIT_ROOM); |
| 1311 | |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1312 | si->state = SI_ST_DIS; |
| 1313 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1314 | return; |
| 1315 | } |
| 1316 | |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 1317 | /* |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 1318 | * Local variables: |
| 1319 | * c-indent-level: 8 |
| 1320 | * c-basic-offset: 8 |
| 1321 | * End: |
| 1322 | */ |