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 | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame^] | 40 | static int stream_int_shutr(struct stream_interface *si); |
| 41 | static int 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 | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame^] | 45 | static int stream_int_shutr_conn(struct stream_interface *si); |
| 46 | static int 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 |
| 216 | * it exists. No control layer is supposed to be defined so this function |
| 217 | * always returns zero. |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 218 | */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame^] | 219 | static int stream_int_shutr(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 220 | { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 221 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 222 | if (si->ib->flags & CF_SHUTR) |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 223 | return 0; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 224 | si->ib->flags |= CF_SHUTR; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 225 | si->ib->rex = TICK_ETERNITY; |
| 226 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 227 | |
| 228 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 229 | return 0; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 230 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 231 | if (si->ob->flags & CF_SHUTW) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 232 | si->state = SI_ST_DIS; |
| 233 | si->exp = TICK_ETERNITY; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 234 | |
Willy Tarreau | d8ccffe | 2010-09-07 16:16:50 +0200 | [diff] [blame] | 235 | if (si->release) |
| 236 | si->release(si); |
| 237 | } |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 238 | else if (si->flags & SI_FL_NOHALF) { |
| 239 | /* we want to immediately forward this close to the write side */ |
| 240 | return stream_int_shutw(si); |
| 241 | } |
Willy Tarreau | 0bd05ea | 2010-07-02 11:18:03 +0200 | [diff] [blame] | 242 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 243 | /* 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^] | 244 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 245 | task_wakeup(si->owner, TASK_WOKEN_IO); |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 246 | return 0; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 247 | } |
| 248 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 249 | /* |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame^] | 250 | * This function performs a shutdown-write on a stream interface attached to an |
| 251 | * applet in a connected or init state (it does nothing for other states). It |
| 252 | * either shuts the write side or marks itself as closed. The buffer flags are |
| 253 | * updated to reflect the new state. It does also close everything if the SI |
| 254 | * was marked as being in error state. The owner task is woken up if it exists. |
| 255 | * No control layer is supposed to be defined so this function always returns |
| 256 | * zero. |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 257 | */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame^] | 258 | static int stream_int_shutw(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 259 | { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 260 | si->ob->flags &= ~CF_SHUTW_NOW; |
| 261 | if (si->ob->flags & CF_SHUTW) |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 262 | return 0; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 263 | si->ob->flags |= CF_SHUTW; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 264 | si->ob->wex = TICK_ETERNITY; |
| 265 | si->flags &= ~SI_FL_WAIT_DATA; |
| 266 | |
| 267 | switch (si->state) { |
| 268 | case SI_ST_EST: |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 269 | /* we have to shut before closing, otherwise some short messages |
| 270 | * may never leave the system, especially when there are remaining |
| 271 | * unread data in the socket input buffer, or when nolinger is set. |
| 272 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 273 | * no risk so we close both sides immediately. |
| 274 | */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame^] | 275 | if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) && |
| 276 | !(si->ib->flags & (CF_SHUTR|CF_DONT_READ))) |
| 277 | return 0; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 278 | |
| 279 | /* fall through */ |
| 280 | case SI_ST_CON: |
| 281 | case SI_ST_CER: |
Willy Tarreau | 32d3ee9 | 2010-12-29 14:03:02 +0100 | [diff] [blame] | 282 | case SI_ST_QUE: |
| 283 | case SI_ST_TAR: |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame^] | 284 | /* Note that none of these states may happen with applets */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 285 | si->state = SI_ST_DIS; |
Willy Tarreau | d8ccffe | 2010-09-07 16:16:50 +0200 | [diff] [blame] | 286 | |
| 287 | if (si->release) |
| 288 | si->release(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 289 | default: |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame^] | 290 | si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER); |
| 291 | si->ib->flags &= ~CF_SHUTR_NOW; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 292 | si->ib->flags |= CF_SHUTR; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 293 | si->ib->rex = TICK_ETERNITY; |
| 294 | si->exp = TICK_ETERNITY; |
| 295 | } |
| 296 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 297 | /* note that if the task exists, it must unregister itself once it runs */ |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame^] | 298 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 299 | task_wakeup(si->owner, TASK_WOKEN_IO); |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 300 | return 0; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 301 | } |
| 302 | |
| 303 | /* default chk_rcv function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 304 | static void stream_int_chk_rcv(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 305 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 306 | struct channel *ib = si->ib; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 307 | |
| 308 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 309 | __FUNCTION__, |
| 310 | si, si->state, si->ib->flags, si->ob->flags); |
| 311 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 312 | 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] | 313 | return; |
| 314 | |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 315 | if (channel_full(ib)) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 316 | /* stop reading */ |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 317 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 318 | } |
| 319 | else { |
| 320 | /* (re)start reading */ |
| 321 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 322 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 323 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 324 | } |
| 325 | } |
| 326 | |
| 327 | /* default chk_snd function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 328 | static void stream_int_chk_snd(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 329 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 330 | struct channel *ob = si->ob; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 331 | |
| 332 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 333 | __FUNCTION__, |
| 334 | si, si->state, si->ib->flags, si->ob->flags); |
| 335 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 336 | if (unlikely(si->state != SI_ST_EST || (si->ob->flags & CF_SHUTW))) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 337 | return; |
| 338 | |
| 339 | if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 340 | channel_is_empty(ob)) /* called with nothing to send ! */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 341 | return; |
| 342 | |
| 343 | /* Otherwise there are remaining data to be sent in the buffer, |
| 344 | * so we tell the handler. |
| 345 | */ |
| 346 | si->flags &= ~SI_FL_WAIT_DATA; |
| 347 | if (!tick_isset(ob->wex)) |
| 348 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 349 | |
| 350 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 351 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 352 | } |
| 353 | |
Willy Tarreau | b24281b | 2011-02-13 13:16:36 +0100 | [diff] [blame] | 354 | /* 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] | 355 | * 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] | 356 | * 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] | 357 | * function before returning. It must be deleted by the task handler using |
Willy Tarreau | b24281b | 2011-02-13 13:16:36 +0100 | [diff] [blame] | 358 | * stream_int_unregister_handler(), possibly from within the function itself. |
Willy Tarreau | fa6bac6 | 2012-05-31 14:16:59 +0200 | [diff] [blame] | 359 | * It also pre-initializes applet.state to zero and the connection context |
| 360 | * to NULL. |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 361 | */ |
Willy Tarreau | b24281b | 2011-02-13 13:16:36 +0100 | [diff] [blame] | 362 | 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] | 363 | { |
Simon Horman | 7abd00d | 2011-08-13 08:03:51 +0900 | [diff] [blame] | 364 | 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] | 365 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 366 | si_prepare_embedded(si); |
Willy Tarreau | 3fdb366 | 2012-11-12 00:42:33 +0100 | [diff] [blame] | 367 | si->conn->target = &app->obj_type; |
Willy Tarreau | 128b03c | 2012-11-11 23:14:16 +0100 | [diff] [blame] | 368 | si->release = app->release; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 369 | si->flags |= SI_FL_WAIT_DATA; |
| 370 | return si->owner; |
| 371 | } |
| 372 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 373 | /* 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] | 374 | * 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] | 375 | */ |
| 376 | void stream_int_unregister_handler(struct stream_interface *si) |
| 377 | { |
Willy Tarreau | 128b03c | 2012-11-11 23:14:16 +0100 | [diff] [blame] | 378 | si->release = NULL; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 379 | si->owner = NULL; |
Willy Tarreau | 3fdb366 | 2012-11-12 00:42:33 +0100 | [diff] [blame] | 380 | si->conn->target = NULL; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 381 | } |
| 382 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 383 | /* 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] | 384 | * established. It returns 0 if it fails in a fatal way or needs to poll to go |
| 385 | * 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] | 386 | * flags (the bit is provided in <flag> by the caller). It is designed to be |
| 387 | * called by the connection handler and relies on it to commit polling changes. |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 388 | */ |
| 389 | int conn_si_send_proxy(struct connection *conn, unsigned int flag) |
| 390 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 391 | struct stream_interface *si = conn->owner; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 392 | |
| 393 | /* we might have been called just after an asynchronous shutw */ |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 394 | if (conn->flags & CO_FL_SOCK_WR_SH) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 395 | goto out_error; |
| 396 | |
| 397 | /* If we have a PROXY line to send, we'll use this to validate the |
| 398 | * connection, in which case the connection is validated only once |
| 399 | * we've sent the whole proxy line. Otherwise we use connect(). |
| 400 | */ |
Willy Tarreau | 7fe4569 | 2013-12-04 23:37:56 +0100 | [diff] [blame] | 401 | while (si->send_proxy_ofs) { |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 402 | int ret; |
| 403 | |
| 404 | /* The target server expects a PROXY line to be sent first. |
| 405 | * If the send_proxy_ofs is negative, it corresponds to the |
| 406 | * offset to start sending from then end of the proxy string |
| 407 | * (which is recomputed every time since it's constant). If |
| 408 | * it is positive, it means we have to send from the start. |
| 409 | */ |
Willy Tarreau | 19d14ef | 2012-10-29 16:51:55 +0100 | [diff] [blame] | 410 | ret = make_proxy_line(trash.str, trash.size, &si->ob->prod->conn->addr.from, &si->ob->prod->conn->addr.to); |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 411 | if (!ret) |
| 412 | goto out_error; |
| 413 | |
| 414 | if (si->send_proxy_ofs > 0) |
| 415 | si->send_proxy_ofs = -ret; /* first call */ |
| 416 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 417 | /* we have to send trash from (ret+sp for -sp bytes). If the |
| 418 | * data layer has a pending write, we'll also set MSG_MORE. |
| 419 | */ |
Willy Tarreau | 19d14ef | 2012-10-29 16:51:55 +0100 | [diff] [blame] | 420 | ret = send(conn->t.sock.fd, trash.str + ret + si->send_proxy_ofs, -si->send_proxy_ofs, |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 421 | (conn->flags & CO_FL_DATA_WR_ENA) ? MSG_MORE : 0); |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 422 | |
| 423 | if (ret == 0) |
| 424 | goto out_wait; |
| 425 | |
| 426 | if (ret < 0) { |
Willy Tarreau | 95742a4 | 2013-09-03 09:02:11 +0200 | [diff] [blame] | 427 | if (errno == EAGAIN || errno == ENOTCONN) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 428 | goto out_wait; |
Willy Tarreau | 7fe4569 | 2013-12-04 23:37:56 +0100 | [diff] [blame] | 429 | if (errno == EINTR) |
| 430 | continue; |
Willy Tarreau | 26f4a04 | 2013-12-04 23:44:10 +0100 | [diff] [blame] | 431 | conn->flags |= CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 432 | goto out_error; |
| 433 | } |
| 434 | |
| 435 | si->send_proxy_ofs += ret; /* becomes zero once complete */ |
| 436 | if (si->send_proxy_ofs != 0) |
| 437 | goto out_wait; |
| 438 | |
| 439 | /* OK we've sent the whole line, we're connected */ |
Willy Tarreau | 7fe4569 | 2013-12-04 23:37:56 +0100 | [diff] [blame] | 440 | break; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 441 | } |
| 442 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 443 | /* The connection is ready now, simply return and let the connection |
| 444 | * handler notify upper layers if needed. |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 445 | */ |
| 446 | if (conn->flags & CO_FL_WAIT_L4_CONN) |
| 447 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 448 | conn->flags &= ~flag; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 449 | return 1; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 450 | |
| 451 | out_error: |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 452 | /* Write error on the file descriptor */ |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 453 | conn->flags |= CO_FL_ERROR; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 454 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 455 | |
| 456 | out_wait: |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 457 | __conn_sock_stop_recv(conn); |
| 458 | __conn_sock_poll_send(conn); |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 459 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 460 | } |
| 461 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 462 | /* 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] | 463 | * 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] | 464 | * 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] | 465 | * an important event requires special handling. It relies on the connection handler |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 466 | * to commit any polling updates. The function always returns 0. |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 467 | */ |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 468 | static int si_conn_wake_cb(struct connection *conn) |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 469 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 470 | struct stream_interface *si = conn->owner; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 471 | |
| 472 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 473 | __FUNCTION__, |
| 474 | si, si->state, si->ib->flags, si->ob->flags); |
| 475 | |
Willy Tarreau | 3c55ec2 | 2012-07-23 19:19:51 +0200 | [diff] [blame] | 476 | if (conn->flags & CO_FL_ERROR) |
| 477 | si->flags |= SI_FL_ERR; |
| 478 | |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 479 | /* check for recent connection establishment */ |
Willy Tarreau | c76ae33 | 2012-07-12 15:32:13 +0200 | [diff] [blame] | 480 | 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] | 481 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 482 | si->ob->flags |= CF_WRITE_NULL; |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 483 | } |
| 484 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 485 | /* process consumer side */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 486 | if (channel_is_empty(si->ob)) { |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 487 | if (((si->ob->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 488 | (si->state == SI_ST_EST)) |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame^] | 489 | stream_int_shutw_conn(si); |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 490 | __conn_data_stop_send(conn); |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 491 | si->ob->wex = TICK_ETERNITY; |
| 492 | } |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 493 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 494 | 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] | 495 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 496 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 497 | if (si->ob->flags & CF_WRITE_ACTIVITY) { |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 498 | /* update timeouts if we have written something */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 499 | if ((si->ob->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 500 | !channel_is_empty(si->ob)) |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 501 | if (tick_isset(si->ob->wex)) |
| 502 | si->ob->wex = tick_add_ifset(now_ms, si->ob->wto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 503 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 504 | if (!(si->flags & SI_FL_INDEP_STR)) |
| 505 | if (tick_isset(si->ib->rex)) |
| 506 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 507 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 508 | 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] | 509 | !channel_full(si->ob) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 510 | (si->ob->prod->flags & SI_FL_WAIT_ROOM))) |
| 511 | si_chk_rcv(si->ob->prod); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 512 | } |
| 513 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 514 | /* process producer side. |
| 515 | * We might have some data the consumer is waiting for. |
| 516 | * We can do fast-forwarding, but we avoid doing this for partial |
| 517 | * buffers, because it is very likely that it will be done again |
| 518 | * immediately afterwards once the following data is parsed (eg: |
| 519 | * HTTP chunking). |
| 520 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 521 | if (((si->ib->flags & CF_READ_PARTIAL) && !channel_is_empty(si->ib)) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 522 | (si->ib->pipe /* always try to send spliced data */ || |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 523 | (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] | 524 | int last_len = si->ib->pipe ? si->ib->pipe->data : 0; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 525 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 526 | si_chk_snd(si->ib->cons); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 527 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 528 | /* check if the consumer has freed some space either in the |
| 529 | * buffer or in the pipe. |
| 530 | */ |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 531 | if (!channel_full(si->ib) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 532 | (!last_len || !si->ib->pipe || si->ib->pipe->data < last_len)) |
| 533 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 534 | } |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 535 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 536 | if (si->flags & SI_FL_WAIT_ROOM) { |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 537 | __conn_data_stop_recv(conn); |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 538 | si->ib->rex = TICK_ETERNITY; |
| 539 | } |
Willy Tarreau | 6657276 | 2012-12-19 17:34:17 +0100 | [diff] [blame] | 540 | 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] | 541 | !channel_full(si->ib)) { |
Willy Tarreau | 9f7c6a1 | 2012-11-19 16:43:14 +0100 | [diff] [blame] | 542 | /* we must re-enable reading if si_chk_snd() has freed some space */ |
| 543 | __conn_data_want_recv(conn); |
Willy Tarreau | 6657276 | 2012-12-19 17:34:17 +0100 | [diff] [blame] | 544 | if (!(si->ib->flags & CF_READ_NOEXP) && tick_isset(si->ib->rex)) |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 545 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 546 | } |
| 547 | |
| 548 | /* wake the task up only when needed */ |
| 549 | if (/* changes on the production side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 550 | (si->ib->flags & (CF_READ_NULL|CF_READ_ERROR)) || |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 551 | si->state != SI_ST_EST || |
| 552 | (si->flags & SI_FL_ERR) || |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 553 | ((si->ib->flags & CF_READ_PARTIAL) && |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 554 | (!si->ib->to_forward || si->ib->cons->state != SI_ST_EST)) || |
| 555 | |
| 556 | /* changes on the consumption side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 557 | (si->ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) || |
| 558 | ((si->ob->flags & CF_WRITE_ACTIVITY) && |
| 559 | ((si->ob->flags & CF_SHUTW) || |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 560 | si->ob->prod->state != SI_ST_EST || |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 561 | (channel_is_empty(si->ob) && !si->ob->to_forward)))) { |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 562 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 563 | } |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 564 | if (si->ib->flags & CF_READ_ACTIVITY) |
| 565 | si->ib->flags &= ~CF_READ_DONTWAIT; |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 566 | return 0; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 567 | } |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 568 | |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 569 | /* |
| 570 | * This function is called to send buffer data to a stream socket. |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 571 | * It calls the transport layer's snd_buf function. It relies on the |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 572 | * caller to commit polling changes. The caller should check conn->flags |
| 573 | * for errors. |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 574 | */ |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 575 | static void si_conn_send(struct connection *conn) |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 576 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 577 | struct stream_interface *si = conn->owner; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 578 | struct channel *chn = si->ob; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 579 | int ret; |
| 580 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 581 | if (chn->pipe && conn->xprt->snd_pipe) { |
| 582 | ret = conn->xprt->snd_pipe(conn, chn->pipe); |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 583 | if (ret > 0) |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 584 | chn->flags |= CF_WRITE_PARTIAL; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 585 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 586 | if (!chn->pipe->data) { |
| 587 | put_pipe(chn->pipe); |
| 588 | chn->pipe = NULL; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 589 | } |
| 590 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 591 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 592 | return; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 593 | } |
| 594 | |
| 595 | /* At this point, the pipe is empty, but we may still have data pending |
| 596 | * in the normal buffer. |
| 597 | */ |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 598 | if (!chn->buf->o) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 599 | return; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 600 | |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 601 | /* when we're here, we already know that there is no spliced |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 602 | * data left, and that there are sendable buffered data. |
| 603 | */ |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 604 | 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] | 605 | /* check if we want to inform the kernel that we're interested in |
| 606 | * sending more data after this call. We want this if : |
| 607 | * - we're about to close after this last send and want to merge |
| 608 | * the ongoing FIN with the last segment. |
| 609 | * - we know we can't send everything at once and must get back |
| 610 | * here because of unaligned data |
| 611 | * - there is still a finite amount of data to forward |
| 612 | * The test is arranged so that the most common case does only 2 |
| 613 | * tests. |
| 614 | */ |
| 615 | unsigned int send_flag = MSG_DONTWAIT | MSG_NOSIGNAL; |
| 616 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 617 | if ((!(chn->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) && |
| 618 | ((chn->to_forward && chn->to_forward != CHN_INFINITE_FORWARD) || |
| 619 | (chn->flags & CF_EXPECT_MORE))) || |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 620 | ((chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW)) |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 621 | send_flag |= MSG_MORE; |
| 622 | |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 623 | ret = conn->xprt->snd_buf(conn, chn->buf, send_flag); |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 624 | if (ret > 0) { |
| 625 | chn->flags |= CF_WRITE_PARTIAL; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 626 | |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 627 | if (!chn->buf->o) { |
| 628 | /* Always clear both flags once everything has been sent, they're one-shot */ |
| 629 | chn->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT); |
| 630 | } |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 631 | |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 632 | /* if some data remain in the buffer, it's only because the |
| 633 | * system buffers are full, we will try next time. |
| 634 | */ |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 635 | } |
Godbach | e68e02d | 2013-10-11 15:48:29 +0800 | [diff] [blame] | 636 | } |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 637 | |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 638 | return; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 639 | } |
| 640 | |
| 641 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 642 | /* Updates the timers and flags of a stream interface attached to a connection, |
| 643 | * depending on the buffers' flags. It should only be called once after the |
| 644 | * buffer flags have settled down, and before they are cleared. It doesn't |
| 645 | * harm to call it as often as desired (it just slightly hurts performance). |
| 646 | * It is only meant to be called by upper layers after buffer flags have been |
| 647 | * manipulated by analysers. |
| 648 | */ |
| 649 | void stream_int_update_conn(struct stream_interface *si) |
| 650 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 651 | struct channel *ib = si->ib; |
| 652 | struct channel *ob = si->ob; |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 653 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 654 | /* Check if we need to close the read side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 655 | if (!(ib->flags & CF_SHUTR)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 656 | /* Read not closed, update FD status and timeout for reads */ |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 657 | if ((ib->flags & CF_DONT_READ) || channel_full(ib)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 658 | /* stop reading */ |
| 659 | if (!(si->flags & SI_FL_WAIT_ROOM)) { |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 660 | if (!(ib->flags & CF_DONT_READ)) /* full */ |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 661 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | f2943dc | 2012-10-26 20:10:28 +0200 | [diff] [blame] | 662 | conn_data_stop_recv(si->conn); |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 663 | ib->rex = TICK_ETERNITY; |
| 664 | } |
| 665 | } |
| 666 | else { |
| 667 | /* (re)start reading and update timeout. Note: we don't recompute the timeout |
| 668 | * everytime we get here, otherwise it would risk never to expire. We only |
| 669 | * update it if is was not yet set. The stream socket handler will already |
| 670 | * have updated it if there has been a completed I/O. |
| 671 | */ |
| 672 | si->flags &= ~SI_FL_WAIT_ROOM; |
Willy Tarreau | f2943dc | 2012-10-26 20:10:28 +0200 | [diff] [blame] | 673 | conn_data_want_recv(si->conn); |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 674 | 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] | 675 | ib->rex = tick_add_ifset(now_ms, ib->rto); |
| 676 | } |
| 677 | } |
| 678 | |
| 679 | /* Check if we need to close the write side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 680 | if (!(ob->flags & CF_SHUTW)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 681 | /* Write not closed, update FD status and timeout for writes */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 682 | if (channel_is_empty(ob)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 683 | /* stop writing */ |
| 684 | if (!(si->flags & SI_FL_WAIT_DATA)) { |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 685 | if ((ob->flags & CF_SHUTW_NOW) == 0) |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 686 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | f2943dc | 2012-10-26 20:10:28 +0200 | [diff] [blame] | 687 | conn_data_stop_send(si->conn); |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 688 | ob->wex = TICK_ETERNITY; |
| 689 | } |
| 690 | } |
| 691 | else { |
| 692 | /* (re)start writing and update timeout. Note: we don't recompute the timeout |
| 693 | * everytime we get here, otherwise it would risk never to expire. We only |
| 694 | * update it if is was not yet set. The stream socket handler will already |
| 695 | * have updated it if there has been a completed I/O. |
| 696 | */ |
| 697 | si->flags &= ~SI_FL_WAIT_DATA; |
Willy Tarreau | f2943dc | 2012-10-26 20:10:28 +0200 | [diff] [blame] | 698 | conn_data_want_send(si->conn); |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 699 | if (!tick_isset(ob->wex)) { |
| 700 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 701 | if (tick_isset(ib->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
| 702 | /* Note: depending on the protocol, we don't know if we're waiting |
| 703 | * for incoming data or not. So in order to prevent the socket from |
| 704 | * expiring read timeouts during writes, we refresh the read timeout, |
| 705 | * except if it was already infinite or if we have explicitly setup |
| 706 | * independent streams. |
| 707 | */ |
| 708 | ib->rex = tick_add_ifset(now_ms, ib->rto); |
| 709 | } |
| 710 | } |
| 711 | } |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame^] | 712 | } |
| 713 | } |
| 714 | |
| 715 | /* |
| 716 | * This function performs a shutdown-read on a stream interface attached to |
| 717 | * a connection in a connected or init state (it does nothing for other |
| 718 | * states). It either shuts the read side or marks itself as closed. The buffer |
| 719 | * flags are updated to reflect the new state. If the stream interface has |
| 720 | * SI_FL_NOHALF, we also forward the close to the write side. If a control |
| 721 | * layer is defined, then it is supposed to be a socket layer and file |
| 722 | * descriptors are then shutdown or closed accordingly. The function does not |
| 723 | * disable polling on the FD by itself, it returns non-zero instead if the |
| 724 | * caller needs to do so (except when the FD is deleted where this is |
| 725 | * implicit). |
| 726 | */ |
| 727 | static int stream_int_shutr_conn(struct stream_interface *si) |
| 728 | { |
| 729 | struct connection *conn = si->conn; |
| 730 | |
| 731 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 732 | if (si->ib->flags & CF_SHUTR) |
| 733 | return 0; |
| 734 | si->ib->flags |= CF_SHUTR; |
| 735 | si->ib->rex = TICK_ETERNITY; |
| 736 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 737 | |
| 738 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
| 739 | return 0; |
| 740 | |
| 741 | if (si->ob->flags & CF_SHUTW) { |
| 742 | conn_full_close(si->conn); |
| 743 | si->state = SI_ST_DIS; |
| 744 | si->exp = TICK_ETERNITY; |
| 745 | |
| 746 | if (si->release) |
| 747 | si->release(si); |
| 748 | } |
| 749 | else if (si->flags & SI_FL_NOHALF) { |
| 750 | /* we want to immediately forward this close to the write side */ |
| 751 | return stream_int_shutw_conn(si); |
| 752 | } |
| 753 | else if (conn->ctrl) { |
| 754 | /* we want the caller to disable polling on this FD */ |
| 755 | return 1; |
| 756 | } |
| 757 | |
| 758 | return 0; |
| 759 | } |
| 760 | |
| 761 | /* |
| 762 | * This function performs a shutdown-write on a stream interface attached to |
| 763 | * a connection in a connected or init state (it does nothing for other |
| 764 | * states). It either shuts the write side or marks itself as closed. The |
| 765 | * buffer flags are updated to reflect the new state. It does also close |
| 766 | * everything if the SI was marked as being in error state. If there is a |
| 767 | * data-layer shutdown, it is called. If a control layer is defined, then it is |
| 768 | * supposed to be a socket layer and file descriptors are then shutdown or |
| 769 | * closed accordingly. The function does not disable polling on the FD by |
| 770 | * itself, it returns non-zero instead if the caller needs to do so (except |
| 771 | * when the FD is deleted where this is implicit). Note: at the moment, we |
| 772 | * continue to check conn->ctrl eventhough we *know* it is valid. This will |
| 773 | * help selecting the proper shutdown() and setsockopt() calls if/when we |
| 774 | * implement remote sockets later. |
| 775 | */ |
| 776 | static int stream_int_shutw_conn(struct stream_interface *si) |
| 777 | { |
| 778 | struct connection *conn = si->conn; |
| 779 | |
| 780 | si->ob->flags &= ~CF_SHUTW_NOW; |
| 781 | if (si->ob->flags & CF_SHUTW) |
| 782 | return 0; |
| 783 | si->ob->flags |= CF_SHUTW; |
| 784 | si->ob->wex = TICK_ETERNITY; |
| 785 | si->flags &= ~SI_FL_WAIT_DATA; |
| 786 | |
| 787 | switch (si->state) { |
| 788 | case SI_ST_EST: |
| 789 | /* we have to shut before closing, otherwise some short messages |
| 790 | * may never leave the system, especially when there are remaining |
| 791 | * unread data in the socket input buffer, or when nolinger is set. |
| 792 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 793 | * no risk so we close both sides immediately. |
| 794 | */ |
| 795 | if (si->flags & SI_FL_ERR) { |
| 796 | /* quick close, the socket is alredy shut anyway */ |
| 797 | } |
| 798 | else if (si->flags & SI_FL_NOLINGER) { |
| 799 | if (conn->ctrl) { |
| 800 | setsockopt(si->conn->t.sock.fd, SOL_SOCKET, SO_LINGER, |
| 801 | (struct linger *) &nolinger, sizeof(struct linger)); |
| 802 | } |
| 803 | /* unclean data-layer shutdown */ |
| 804 | if (conn->xprt && conn->xprt->shutw) |
| 805 | conn->xprt->shutw(conn, 0); |
| 806 | } |
| 807 | else { |
| 808 | /* clean data-layer shutdown */ |
| 809 | if (conn->xprt && conn->xprt->shutw) |
| 810 | conn->xprt->shutw(conn, 1); |
| 811 | |
| 812 | /* If the stream interface is configured to disable half-open |
| 813 | * connections, we'll skip the shutdown(), but only if the |
| 814 | * read size is already closed. Otherwise we can't support |
| 815 | * closed write with pending read (eg: abortonclose while |
| 816 | * waiting for the server). |
| 817 | */ |
| 818 | if (!(si->flags & SI_FL_NOHALF) || !(si->ib->flags & (CF_SHUTR|CF_DONT_READ))) { |
| 819 | /* We shutdown transport layer */ |
| 820 | if (conn->ctrl) |
| 821 | shutdown(si->conn->t.sock.fd, SHUT_WR); |
| 822 | |
| 823 | if (!(si->ib->flags & (CF_SHUTR|CF_DONT_READ))) { |
| 824 | /* OK just a shutw, but we want the caller |
| 825 | * to disable polling on this FD if exists. |
| 826 | */ |
| 827 | return !!conn->ctrl; |
| 828 | } |
| 829 | } |
| 830 | } |
| 831 | |
| 832 | /* fall through */ |
| 833 | case SI_ST_CON: |
| 834 | /* we may have to close a pending connection, and mark the |
| 835 | * response buffer as shutr |
| 836 | */ |
| 837 | conn_full_close(si->conn); |
| 838 | /* fall through */ |
| 839 | case SI_ST_CER: |
| 840 | case SI_ST_QUE: |
| 841 | case SI_ST_TAR: |
| 842 | si->state = SI_ST_DIS; |
| 843 | |
| 844 | if (si->release) |
| 845 | si->release(si); |
| 846 | default: |
| 847 | si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER); |
| 848 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 849 | si->ib->flags |= CF_SHUTR; |
| 850 | si->ib->rex = TICK_ETERNITY; |
| 851 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 852 | } |
Willy Tarreau | 8b3d7df | 2013-09-29 14:51:58 +0200 | [diff] [blame^] | 853 | return 0; |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 854 | } |
| 855 | |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 856 | /* This function is used for inter-stream-interface calls. It is called by the |
| 857 | * consumer to inform the producer side that it may be interested in checking |
| 858 | * for free space in the buffer. Note that it intentionally does not update |
| 859 | * timeouts, so that we can still check them later at wake-up. This function is |
| 860 | * dedicated to connection-based stream interfaces. |
| 861 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 862 | static void stream_int_chk_rcv_conn(struct stream_interface *si) |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 863 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 864 | struct channel *ib = si->ib; |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 865 | |
Willy Tarreau | 34ffd77 | 2012-09-03 16:51:27 +0200 | [diff] [blame] | 866 | if (unlikely(si->state > SI_ST_EST || (ib->flags & CF_SHUTR))) |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 867 | return; |
| 868 | |
Willy Tarreau | 7d28149 | 2012-12-16 19:19:13 +0100 | [diff] [blame] | 869 | conn_refresh_polling_flags(si->conn); |
| 870 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 871 | if ((ib->flags & CF_DONT_READ) || channel_full(ib)) { |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 872 | /* stop reading */ |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 873 | if (!(ib->flags & CF_DONT_READ)) /* full */ |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 874 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | 7d28149 | 2012-12-16 19:19:13 +0100 | [diff] [blame] | 875 | __conn_data_stop_recv(si->conn); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 876 | } |
| 877 | else { |
| 878 | /* (re)start reading */ |
| 879 | si->flags &= ~SI_FL_WAIT_ROOM; |
Willy Tarreau | 7d28149 | 2012-12-16 19:19:13 +0100 | [diff] [blame] | 880 | __conn_data_want_recv(si->conn); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 881 | } |
Willy Tarreau | 7d28149 | 2012-12-16 19:19:13 +0100 | [diff] [blame] | 882 | conn_cond_update_data_polling(si->conn); |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 883 | } |
| 884 | |
| 885 | |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 886 | /* This function is used for inter-stream-interface calls. It is called by the |
| 887 | * producer to inform the consumer side that it may be interested in checking |
| 888 | * for data in the buffer. Note that it intentionally does not update timeouts, |
| 889 | * so that we can still check them later at wake-up. |
| 890 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 891 | static void stream_int_chk_snd_conn(struct stream_interface *si) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 892 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 893 | struct channel *ob = si->ob; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 894 | |
Willy Tarreau | 34ffd77 | 2012-09-03 16:51:27 +0200 | [diff] [blame] | 895 | if (unlikely(si->state > SI_ST_EST || (ob->flags & CF_SHUTW))) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 896 | return; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 897 | |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 898 | if (unlikely(channel_is_empty(ob))) /* called with nothing to send ! */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 899 | return; |
| 900 | |
| 901 | if (!ob->pipe && /* spliced data wants to be forwarded ASAP */ |
Willy Tarreau | b016587 | 2012-12-15 10:12:39 +0100 | [diff] [blame] | 902 | !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 903 | return; |
| 904 | |
Willy Tarreau | 5007d2a | 2013-07-18 22:09:48 +0200 | [diff] [blame] | 905 | if (si->conn->flags & (CO_FL_DATA_WR_ENA|CO_FL_CURR_WR_ENA)) { |
| 906 | /* already subscribed to write notifications, will be called |
| 907 | * anyway, so let's avoid calling it especially if the reader |
| 908 | * is not ready. |
| 909 | */ |
| 910 | return; |
| 911 | } |
| 912 | |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 913 | if (!(si->conn->flags & (CO_FL_HANDSHAKE|CO_FL_WAIT_L4_CONN|CO_FL_WAIT_L6_CONN))) { |
| 914 | /* Before calling the data-level operations, we have to prepare |
| 915 | * the polling flags to ensure we properly detect changes. |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 916 | */ |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 917 | if (si->conn->ctrl) |
| 918 | fd_want_send(si->conn->t.sock.fd); |
Willy Tarreau | 7d28149 | 2012-12-16 19:19:13 +0100 | [diff] [blame] | 919 | |
| 920 | conn_refresh_polling_flags(si->conn); |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 921 | |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 922 | si_conn_send(si->conn); |
| 923 | if (si->conn->flags & CO_FL_ERROR) { |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 924 | /* Write error on the file descriptor */ |
| 925 | fd_stop_both(si->conn->t.sock.fd); |
| 926 | __conn_data_stop_both(si->conn); |
| 927 | si->flags |= SI_FL_ERR; |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 928 | goto out_wakeup; |
| 929 | } |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 930 | } |
| 931 | |
| 932 | /* OK, so now we know that some data might have been sent, and that we may |
| 933 | * have to poll first. We have to do that too if the buffer is not empty. |
| 934 | */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 935 | if (channel_is_empty(ob)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 936 | /* the connection is established but we can't write. Either the |
| 937 | * buffer is empty, or we just refrain from sending because the |
| 938 | * ->o limit was reached. Maybe we just wrote the last |
| 939 | * chunk and need to close. |
| 940 | */ |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 941 | __conn_data_stop_send(si->conn); |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 942 | if (((ob->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) == |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 943 | (CF_AUTO_CLOSE|CF_SHUTW_NOW)) && |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 944 | (si->state == SI_ST_EST)) { |
| 945 | si_shutw(si); |
| 946 | goto out_wakeup; |
| 947 | } |
| 948 | |
Willy Tarreau | b31c971 | 2012-11-11 23:05:39 +0100 | [diff] [blame] | 949 | if ((ob->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 950 | si->flags |= SI_FL_WAIT_DATA; |
| 951 | ob->wex = TICK_ETERNITY; |
| 952 | } |
| 953 | else { |
| 954 | /* Otherwise there are remaining data to be sent in the buffer, |
| 955 | * which means we have to poll before doing so. |
| 956 | */ |
Willy Tarreau | f2943dc | 2012-10-26 20:10:28 +0200 | [diff] [blame] | 957 | __conn_data_want_send(si->conn); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 958 | si->flags &= ~SI_FL_WAIT_DATA; |
| 959 | if (!tick_isset(ob->wex)) |
| 960 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 961 | } |
| 962 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 963 | if (likely(ob->flags & CF_WRITE_ACTIVITY)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 964 | /* update timeout if we have written something */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 965 | if ((ob->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 966 | !channel_is_empty(ob)) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 967 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 968 | |
| 969 | if (tick_isset(si->ib->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
| 970 | /* Note: to prevent the client from expiring read timeouts |
| 971 | * during writes, we refresh it. We only do this if the |
| 972 | * interface is not configured for "independent streams", |
| 973 | * because for some applications it's better not to do this, |
| 974 | * for instance when continuously exchanging small amounts |
| 975 | * of data which can full the socket buffers long before a |
| 976 | * write timeout is detected. |
| 977 | */ |
| 978 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
| 979 | } |
| 980 | } |
| 981 | |
| 982 | /* in case of special condition (error, shutdown, end of write...), we |
| 983 | * have to notify the task. |
| 984 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 985 | if (likely((ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) || |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 986 | (channel_is_empty(ob) && !ob->to_forward) || |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 987 | si->state != SI_ST_EST)) { |
| 988 | out_wakeup: |
| 989 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 990 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 991 | } |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 992 | |
| 993 | /* commit possible polling changes */ |
Willy Tarreau | f2943dc | 2012-10-26 20:10:28 +0200 | [diff] [blame] | 994 | conn_cond_update_polling(si->conn); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 995 | } |
| 996 | |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 997 | /* |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 998 | * 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] | 999 | * into the buffer from the connection. It iterates over the transport layer's |
| 1000 | * rcv_buf function. |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1001 | */ |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 1002 | static void si_conn_recv_cb(struct connection *conn) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1003 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 1004 | struct stream_interface *si = conn->owner; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1005 | struct channel *chn = si->ib; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1006 | int ret, max, cur_read; |
| 1007 | int read_poll = MAX_READ_POLL_LOOPS; |
| 1008 | |
| 1009 | /* stop immediately on errors. Note that we DON'T want to stop on |
| 1010 | * POLL_ERR, as the poller might report a write error while there |
| 1011 | * are still data available in the recv buffer. This typically |
| 1012 | * happens when we send too large a request to a backend server |
| 1013 | * which rejects it before reading it all. |
| 1014 | */ |
| 1015 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1016 | return; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1017 | |
| 1018 | /* stop here if we reached the end of data */ |
| 1019 | if (conn_data_read0_pending(conn)) |
| 1020 | goto out_shutdown_r; |
| 1021 | |
| 1022 | /* maybe we were called immediately after an asynchronous shutr */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1023 | if (chn->flags & CF_SHUTR) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1024 | return; |
| 1025 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1026 | cur_read = 0; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1027 | |
| 1028 | /* First, let's see if we may splice data across the channel without |
| 1029 | * using a buffer. |
| 1030 | */ |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 1031 | if (conn->xprt->rcv_pipe && |
Willy Tarreau | fa8e2bc | 2013-07-18 22:21:54 +0200 | [diff] [blame] | 1032 | (chn->pipe || chn->to_forward >= MIN_SPLICE_FORWARD) && |
| 1033 | chn->flags & CF_KERN_SPLICING) { |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1034 | if (buffer_not_empty(chn->buf)) { |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1035 | /* We're embarrassed, there are already data pending in |
| 1036 | * the buffer and we don't want to have them at two |
| 1037 | * locations at a time. Let's indicate we need some |
| 1038 | * place and ask the consumer to hurry. |
| 1039 | */ |
| 1040 | goto abort_splice; |
| 1041 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1042 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1043 | if (unlikely(chn->pipe == NULL)) { |
| 1044 | if (pipes_used >= global.maxpipes || !(chn->pipe = get_pipe())) { |
| 1045 | chn->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1046 | goto abort_splice; |
| 1047 | } |
| 1048 | } |
| 1049 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1050 | ret = conn->xprt->rcv_pipe(conn, chn->pipe, chn->to_forward); |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1051 | if (ret < 0) { |
| 1052 | /* splice not supported on this end, let's disable it */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1053 | chn->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1054 | goto abort_splice; |
| 1055 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1056 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1057 | if (ret > 0) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1058 | if (chn->to_forward != CHN_INFINITE_FORWARD) |
| 1059 | chn->to_forward -= ret; |
| 1060 | chn->total += ret; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1061 | cur_read += ret; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1062 | chn->flags |= CF_READ_PARTIAL; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1063 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1064 | |
| 1065 | if (conn_data_read0_pending(conn)) |
| 1066 | goto out_shutdown_r; |
| 1067 | |
| 1068 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1069 | return; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1070 | |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1071 | if (conn->flags & CO_FL_WAIT_ROOM) { |
| 1072 | /* the pipe is full or we have read enough data that it |
| 1073 | * could soon be full. Let's stop before needing to poll. |
| 1074 | */ |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1075 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1076 | __conn_data_stop_recv(conn); |
| 1077 | } |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1078 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1079 | /* splice not possible (anymore), let's go on on standard copy */ |
| 1080 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1081 | |
| 1082 | abort_splice: |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1083 | if (chn->pipe && unlikely(!chn->pipe->data)) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1084 | put_pipe(chn->pipe); |
| 1085 | chn->pipe = NULL; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1086 | } |
| 1087 | |
Willy Tarreau | 61d39a0 | 2013-07-18 21:49:32 +0200 | [diff] [blame] | 1088 | /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling |
| 1089 | * was enabled, which implies that the recv buffer was not full. So we have a guarantee |
| 1090 | * that if such an event is not handled above in splice, it will be handled here by |
| 1091 | * recv(). |
| 1092 | */ |
| 1093 | 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] | 1094 | max = bi_avail(chn); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1095 | |
| 1096 | if (!max) { |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1097 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1098 | break; |
| 1099 | } |
| 1100 | |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1101 | ret = conn->xprt->rcv_buf(conn, chn->buf, max); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1102 | if (ret <= 0) |
| 1103 | break; |
| 1104 | |
| 1105 | cur_read += ret; |
| 1106 | |
| 1107 | /* if we're allowed to directly forward data, we must update ->o */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1108 | if (chn->to_forward && !(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1109 | unsigned long fwd = ret; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1110 | if (chn->to_forward != CHN_INFINITE_FORWARD) { |
| 1111 | if (fwd > chn->to_forward) |
| 1112 | fwd = chn->to_forward; |
| 1113 | chn->to_forward -= fwd; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1114 | } |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1115 | b_adv(chn->buf, fwd); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1116 | } |
| 1117 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1118 | chn->flags |= CF_READ_PARTIAL; |
| 1119 | chn->total += ret; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1120 | |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1121 | if (channel_full(chn)) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1122 | /* The buffer is now full, there's no point in going through |
| 1123 | * the loop again. |
| 1124 | */ |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1125 | if (!(chn->flags & CF_STREAMER_FAST) && (cur_read == buffer_len(chn->buf))) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1126 | chn->xfer_small = 0; |
| 1127 | chn->xfer_large++; |
| 1128 | if (chn->xfer_large >= 3) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1129 | /* we call this buffer a fast streamer if it manages |
| 1130 | * to be filled in one call 3 consecutive times. |
| 1131 | */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1132 | chn->flags |= (CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1133 | //fputc('+', stderr); |
| 1134 | } |
| 1135 | } |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1136 | else if ((chn->flags & (CF_STREAMER | CF_STREAMER_FAST)) && |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1137 | (cur_read <= chn->buf->size / 2)) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1138 | chn->xfer_large = 0; |
| 1139 | chn->xfer_small++; |
| 1140 | if (chn->xfer_small >= 2) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1141 | /* if the buffer has been at least half full twice, |
| 1142 | * we receive faster than we send, so at least it |
| 1143 | * is not a "fast streamer". |
| 1144 | */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1145 | chn->flags &= ~CF_STREAMER_FAST; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1146 | //fputc('-', stderr); |
| 1147 | } |
| 1148 | } |
| 1149 | else { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1150 | chn->xfer_small = 0; |
| 1151 | chn->xfer_large = 0; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1152 | } |
| 1153 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1154 | si->flags |= SI_FL_WAIT_ROOM; |
| 1155 | break; |
| 1156 | } |
| 1157 | |
Willy Tarreau | 5fddab0 | 2012-11-09 18:27:26 +0100 | [diff] [blame] | 1158 | if ((chn->flags & CF_READ_DONTWAIT) || --read_poll <= 0) { |
Willy Tarreau | 34ac566 | 2012-12-19 18:01:02 +0100 | [diff] [blame] | 1159 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | d486ef5 | 2012-12-10 17:03:52 +0100 | [diff] [blame] | 1160 | __conn_data_stop_recv(conn); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1161 | break; |
Willy Tarreau | 5fddab0 | 2012-11-09 18:27:26 +0100 | [diff] [blame] | 1162 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1163 | |
| 1164 | /* if too many bytes were missing from last read, it means that |
| 1165 | * it's pointless trying to read again because the system does |
| 1166 | * not have them in buffers. |
| 1167 | */ |
| 1168 | if (ret < max) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1169 | if ((chn->flags & (CF_STREAMER | CF_STREAMER_FAST)) && |
Willy Tarreau | 9b28e03 | 2012-10-12 23:49:43 +0200 | [diff] [blame] | 1170 | (cur_read <= chn->buf->size / 2)) { |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1171 | chn->xfer_large = 0; |
| 1172 | chn->xfer_small++; |
| 1173 | if (chn->xfer_small >= 3) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1174 | /* we have read less than half of the buffer in |
| 1175 | * one pass, and this happened at least 3 times. |
| 1176 | * This is definitely not a streamer. |
| 1177 | */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1178 | chn->flags &= ~(CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1179 | //fputc('!', stderr); |
| 1180 | } |
| 1181 | } |
| 1182 | |
| 1183 | /* if a streamer has read few data, it may be because we |
| 1184 | * have exhausted system buffers. It's not worth trying |
| 1185 | * again. |
| 1186 | */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1187 | if (chn->flags & CF_STREAMER) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1188 | break; |
| 1189 | |
| 1190 | /* if we read a large block smaller than what we requested, |
| 1191 | * it's almost certain we'll never get anything more. |
| 1192 | */ |
| 1193 | if (ret >= global.tune.recv_enough) |
| 1194 | break; |
| 1195 | } |
| 1196 | } /* while !flags */ |
| 1197 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1198 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1199 | return; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1200 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1201 | if (conn_data_read0_pending(conn)) |
| 1202 | /* connection closed */ |
| 1203 | goto out_shutdown_r; |
| 1204 | |
| 1205 | return; |
| 1206 | |
| 1207 | out_shutdown_r: |
| 1208 | /* we received a shutdown */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1209 | chn->flags |= CF_READ_NULL; |
| 1210 | if (chn->flags & CF_AUTO_CLOSE) |
| 1211 | channel_shutw_now(chn); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1212 | stream_sock_read0(si); |
| 1213 | conn_data_read0(conn); |
| 1214 | return; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1215 | } |
| 1216 | |
| 1217 | /* |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1218 | * 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] | 1219 | * from the buffer to the connection. It iterates over the transport layer's |
| 1220 | * snd_buf function. |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1221 | */ |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 1222 | static void si_conn_send_cb(struct connection *conn) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1223 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 1224 | struct stream_interface *si = conn->owner; |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1225 | struct channel *chn = si->ob; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1226 | |
| 1227 | if (conn->flags & CO_FL_ERROR) |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1228 | return; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1229 | |
Willy Tarreau | f2943dc | 2012-10-26 20:10:28 +0200 | [diff] [blame] | 1230 | if (si->conn->flags & CO_FL_HANDSHAKE) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1231 | /* a handshake was requested */ |
| 1232 | return; |
| 1233 | |
| 1234 | /* we might have been called just after an asynchronous shutw */ |
Willy Tarreau | cb76e59 | 2012-10-12 23:56:57 +0200 | [diff] [blame] | 1235 | if (chn->flags & CF_SHUTW) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1236 | return; |
| 1237 | |
| 1238 | /* OK there are data waiting to be sent */ |
Godbach | 4f48990 | 2013-12-04 17:24:06 +0800 | [diff] [blame] | 1239 | si_conn_send(conn); |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1240 | |
| 1241 | /* OK all done */ |
| 1242 | return; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1243 | } |
| 1244 | |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1245 | /* |
| 1246 | * This function propagates a null read received on a socket-based connection. |
| 1247 | * It updates the stream interface. If the stream interface has SI_FL_NOHALF, |
| 1248 | * the close is also forwarded to the write side as an abort. This function is |
| 1249 | * still socket-specific as it handles a setsockopt() call to set the SO_LINGER |
| 1250 | * state on the socket. |
| 1251 | */ |
| 1252 | void stream_sock_read0(struct stream_interface *si) |
| 1253 | { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1254 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 1255 | if (si->ib->flags & CF_SHUTR) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1256 | return; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1257 | si->ib->flags |= CF_SHUTR; |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1258 | si->ib->rex = TICK_ETERNITY; |
| 1259 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 1260 | |
| 1261 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
| 1262 | return; |
| 1263 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1264 | if (si->ob->flags & CF_SHUTW) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1265 | goto do_close; |
| 1266 | |
| 1267 | if (si->flags & SI_FL_NOHALF) { |
| 1268 | /* we want to immediately forward this close to the write side */ |
| 1269 | if (si->flags & SI_FL_NOLINGER) { |
| 1270 | si->flags &= ~SI_FL_NOLINGER; |
Willy Tarreau | 7f7ad91 | 2012-11-11 19:27:15 +0100 | [diff] [blame] | 1271 | setsockopt(si->conn->t.sock.fd, SOL_SOCKET, SO_LINGER, |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1272 | (struct linger *) &nolinger, sizeof(struct linger)); |
| 1273 | } |
| 1274 | /* force flag on ssl to keep session in cache */ |
Willy Tarreau | f2943dc | 2012-10-26 20:10:28 +0200 | [diff] [blame] | 1275 | if (si->conn->xprt->shutw) |
| 1276 | si->conn->xprt->shutw(si->conn, 0); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1277 | goto do_close; |
| 1278 | } |
| 1279 | |
| 1280 | /* otherwise that's just a normal read shutdown */ |
Willy Tarreau | f2943dc | 2012-10-26 20:10:28 +0200 | [diff] [blame] | 1281 | __conn_data_stop_recv(si->conn); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1282 | return; |
| 1283 | |
| 1284 | do_close: |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1285 | /* OK we completely close the socket here just as if we went through si_shut[rw]() */ |
Willy Tarreau | 2b199c9 | 2012-11-23 17:32:21 +0100 | [diff] [blame] | 1286 | conn_full_close(si->conn); |
Willy Tarreau | f9fbfe8 | 2012-11-21 21:51:53 +0100 | [diff] [blame] | 1287 | |
| 1288 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 1289 | si->ib->flags |= CF_SHUTR; |
| 1290 | si->ib->rex = TICK_ETERNITY; |
| 1291 | |
| 1292 | si->ob->flags &= ~CF_SHUTW_NOW; |
| 1293 | si->ob->flags |= CF_SHUTW; |
| 1294 | si->ob->wex = TICK_ETERNITY; |
| 1295 | |
| 1296 | si->flags &= ~(SI_FL_WAIT_DATA | SI_FL_WAIT_ROOM); |
| 1297 | |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1298 | si->state = SI_ST_DIS; |
| 1299 | si->exp = TICK_ETERNITY; |
| 1300 | if (si->release) |
| 1301 | si->release(si); |
| 1302 | return; |
| 1303 | } |
| 1304 | |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 1305 | /* |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 1306 | * Local variables: |
| 1307 | * c-indent-level: 8 |
| 1308 | * c-basic-offset: 8 |
| 1309 | * End: |
| 1310 | */ |