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 | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 32 | #include <proto/frontend.h> |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 33 | #include <proto/pipe.h> |
Willy Tarreau | 269358d | 2009-09-20 20:14:49 +0200 | [diff] [blame] | 34 | #include <proto/stream_interface.h> |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 35 | #include <proto/task.h> |
| 36 | |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 37 | #include <types/pipe.h> |
| 38 | |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 39 | /* socket functions used when running a stream interface as a task */ |
| 40 | static void stream_int_update(struct stream_interface *si); |
| 41 | static void stream_int_update_embedded(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); |
| 45 | static void stream_int_chk_rcv_conn(struct stream_interface *si); |
| 46 | static void stream_int_chk_snd_conn(struct stream_interface *si); |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame^] | 47 | static void si_conn_recv_cb(struct connection *conn); |
| 48 | static void si_conn_send_cb(struct connection *conn); |
| 49 | static void si_conn_wake_cb(struct connection *conn); |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 50 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 51 | /* stream-interface operations for embedded tasks */ |
| 52 | struct si_ops si_embedded_ops = { |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 53 | .update = stream_int_update_embedded, |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 54 | .chk_rcv = stream_int_chk_rcv, |
| 55 | .chk_snd = stream_int_chk_snd, |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 56 | }; |
| 57 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 58 | /* stream-interface operations for external tasks */ |
| 59 | struct si_ops si_task_ops = { |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 60 | .update = stream_int_update, |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 61 | .chk_rcv = stream_int_chk_rcv, |
| 62 | .chk_snd = stream_int_chk_snd, |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 63 | }; |
| 64 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 65 | /* stream-interface operations for connections */ |
| 66 | struct si_ops si_conn_ops = { |
| 67 | .update = stream_int_update_conn, |
| 68 | .chk_rcv = stream_int_chk_rcv_conn, |
| 69 | .chk_snd = stream_int_chk_snd_conn, |
| 70 | }; |
| 71 | |
Willy Tarreau | 74beec3 | 2012-10-03 00:41:04 +0200 | [diff] [blame] | 72 | struct data_cb si_conn_cb = { |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 73 | .recv = si_conn_recv_cb, |
| 74 | .send = si_conn_send_cb, |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame^] | 75 | .wake = si_conn_wake_cb, |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 76 | }; |
| 77 | |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 78 | /* |
| 79 | * This function only has to be called once after a wakeup event in case of |
| 80 | * suspected timeout. It controls the stream interface timeouts and sets |
| 81 | * si->flags accordingly. It does NOT close anything, as this timeout may |
| 82 | * be used for any purpose. It returns 1 if the timeout fired, otherwise |
| 83 | * zero. |
| 84 | */ |
| 85 | int stream_int_check_timeouts(struct stream_interface *si) |
| 86 | { |
| 87 | if (tick_is_expired(si->exp, now_ms)) { |
| 88 | si->flags |= SI_FL_EXP; |
| 89 | return 1; |
| 90 | } |
| 91 | return 0; |
| 92 | } |
| 93 | |
Willy Tarreau | fe3718a | 2008-11-30 18:14:12 +0100 | [diff] [blame] | 94 | /* 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] | 95 | void stream_int_report_error(struct stream_interface *si) |
| 96 | { |
| 97 | if (!si->err_type) |
| 98 | si->err_type = SI_ET_DATA_ERR; |
| 99 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 100 | si->ob->flags |= CF_WRITE_ERROR; |
| 101 | si->ib->flags |= CF_READ_ERROR; |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 102 | } |
| 103 | |
| 104 | /* |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 105 | * Returns a message to the client ; the connection is shut down for read, |
| 106 | * and the request is cleared so that no server connection can be initiated. |
| 107 | * The buffer is marked for read shutdown on the other side to protect the |
| 108 | * 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] | 109 | * "chunk". If it is null, then an empty message is used. The reply buffer does |
| 110 | * not need to be empty before this, and its contents will not be overwritten. |
| 111 | * 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] | 112 | */ |
| 113 | void stream_int_retnclose(struct stream_interface *si, const struct chunk *msg) |
| 114 | { |
Willy Tarreau | 8263d2b | 2012-08-28 00:06:31 +0200 | [diff] [blame] | 115 | channel_auto_read(si->ib); |
| 116 | channel_abort(si->ib); |
| 117 | channel_auto_close(si->ib); |
| 118 | channel_erase(si->ib); |
Willy Tarreau | 798e128 | 2010-12-12 13:06:00 +0100 | [diff] [blame] | 119 | |
Willy Tarreau | 9dab5fc | 2012-05-07 11:56:55 +0200 | [diff] [blame] | 120 | bi_erase(si->ob); |
Willy Tarreau | 148d099 | 2010-01-10 10:21:21 +0100 | [diff] [blame] | 121 | if (likely(msg && msg->len)) |
Willy Tarreau | 9dab5fc | 2012-05-07 11:56:55 +0200 | [diff] [blame] | 122 | bo_inject(si->ob, msg->str, msg->len); |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 123 | |
| 124 | si->ob->wex = tick_add_ifset(now_ms, si->ob->wto); |
Willy Tarreau | 8263d2b | 2012-08-28 00:06:31 +0200 | [diff] [blame] | 125 | channel_auto_read(si->ob); |
| 126 | channel_auto_close(si->ob); |
| 127 | channel_shutr_now(si->ob); |
Willy Tarreau | 5d881d0 | 2009-12-27 22:51:06 +0100 | [diff] [blame] | 128 | } |
| 129 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 130 | /* default update function for scheduled tasks, not used for embedded tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 131 | static void stream_int_update(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 132 | { |
| 133 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 134 | __FUNCTION__, |
| 135 | si, si->state, si->ib->flags, si->ob->flags); |
| 136 | |
| 137 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 138 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 139 | } |
| 140 | |
| 141 | /* 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] | 142 | static void stream_int_update_embedded(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 143 | { |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 144 | int old_flags = si->flags; |
| 145 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 146 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 147 | __FUNCTION__, |
| 148 | si, si->state, si->ib->flags, si->ob->flags); |
| 149 | |
| 150 | if (si->state != SI_ST_EST) |
| 151 | return; |
| 152 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 153 | if ((si->ob->flags & (CF_SHUTW|CF_HIJACK|CF_SHUTW_NOW)) == CF_SHUTW_NOW && |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 154 | channel_is_empty(si->ob)) |
Willy Tarreau | 73b013b | 2012-05-21 16:31:45 +0200 | [diff] [blame] | 155 | si_shutw(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 156 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 157 | if ((si->ob->flags & (CF_SHUTW|CF_SHUTW_NOW|CF_HIJACK)) == 0 && !channel_full(si->ob)) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 158 | si->flags |= SI_FL_WAIT_DATA; |
| 159 | |
Willy Tarreau | 96fd4b5 | 2009-10-04 17:18:35 +0200 | [diff] [blame] | 160 | /* we're almost sure that we need some space if the buffer is not |
| 161 | * empty, even if it's not full, because the applets can't fill it. |
| 162 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 163 | 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] | 164 | si->flags |= SI_FL_WAIT_ROOM; |
| 165 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 166 | if (si->ob->flags & CF_WRITE_ACTIVITY) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 167 | if (tick_isset(si->ob->wex)) |
| 168 | si->ob->wex = tick_add_ifset(now_ms, si->ob->wto); |
| 169 | } |
| 170 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 171 | if (si->ib->flags & CF_READ_ACTIVITY || |
| 172 | (si->ob->flags & CF_WRITE_ACTIVITY && !(si->flags & SI_FL_INDEP_STR))) { |
Willy Tarreau | f27b5ea | 2009-10-03 22:01:18 +0200 | [diff] [blame] | 173 | if (tick_isset(si->ib->rex)) |
| 174 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
| 175 | } |
| 176 | |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 177 | /* save flags to detect changes */ |
| 178 | old_flags = si->flags; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 179 | 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] | 180 | !channel_full(si->ob) && |
Willy Tarreau | 96fd4b5 | 2009-10-04 17:18:35 +0200 | [diff] [blame] | 181 | (si->ob->prod->flags & SI_FL_WAIT_ROOM))) |
Willy Tarreau | 73b013b | 2012-05-21 16:31:45 +0200 | [diff] [blame] | 182 | si_chk_rcv(si->ob->prod); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 183 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 184 | if (((si->ib->flags & CF_READ_PARTIAL) && !channel_is_empty(si->ib)) && |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 185 | (si->ib->cons->flags & SI_FL_WAIT_DATA)) { |
Willy Tarreau | 73b013b | 2012-05-21 16:31:45 +0200 | [diff] [blame] | 186 | si_chk_snd(si->ib->cons); |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 187 | /* check if the consumer has freed some space */ |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 188 | if (!channel_full(si->ib)) |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 189 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 190 | } |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 191 | |
| 192 | /* Note that we're trying to wake up in two conditions here : |
| 193 | * - special event, which needs the holder task attention |
| 194 | * - status indicating that the applet can go on working. This |
| 195 | * is rather hard because we might be blocking on output and |
| 196 | * 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] | 197 | * to only rely on the changes the chk_* might have performed. |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 198 | */ |
| 199 | if (/* check stream interface changes */ |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 200 | ((old_flags & ~si->flags) & (SI_FL_WAIT_ROOM|SI_FL_WAIT_DATA)) || |
| 201 | |
| 202 | /* changes on the production side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 203 | (si->ib->flags & (CF_READ_NULL|CF_READ_ERROR)) || |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 204 | si->state != SI_ST_EST || |
| 205 | (si->flags & SI_FL_ERR) || |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 206 | ((si->ib->flags & CF_READ_PARTIAL) && |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 207 | (!si->ib->to_forward || si->ib->cons->state != SI_ST_EST)) || |
| 208 | |
| 209 | /* changes on the consumption side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 210 | (si->ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) || |
| 211 | ((si->ob->flags & CF_WRITE_ACTIVITY) && |
| 212 | ((si->ob->flags & CF_SHUTW) || |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 213 | si->ob->prod->state != SI_ST_EST || |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 214 | (channel_is_empty(si->ob) && !si->ob->to_forward)))) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 215 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 216 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 217 | } |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 218 | if (si->ib->flags & CF_READ_ACTIVITY) |
| 219 | si->ib->flags &= ~CF_READ_DONTWAIT; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 220 | } |
| 221 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 222 | /* |
| 223 | * This function performs a shutdown-read on a stream interface in a connected |
| 224 | * or init state (it does nothing for other states). It either shuts the read |
| 225 | * side or marks itself as closed. The buffer flags are updated to reflect the |
| 226 | * new state. If the stream interface has SI_FL_NOHALF, we also forward the |
| 227 | * close to the write side. If a control layer is defined, then it is supposed |
| 228 | * to be a socket layer and file descriptors are then shutdown or closed |
| 229 | * accordingly. If no control layer is defined, then the SI is supposed to be |
| 230 | * an embedded one and the owner task is woken up if it exists. The function |
| 231 | * does not disable polling on the FD by itself, it returns non-zero instead |
| 232 | * if the caller needs to do so (except when the FD is deleted where this is |
| 233 | * implicit). |
| 234 | */ |
| 235 | int stream_int_shutr(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 236 | { |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 237 | struct connection *conn = &si->conn; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 238 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 239 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 240 | if (si->ib->flags & CF_SHUTR) |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 241 | return 0; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 242 | si->ib->flags |= CF_SHUTR; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 243 | si->ib->rex = TICK_ETERNITY; |
| 244 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 245 | |
| 246 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 247 | return 0; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 248 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 249 | if (si->ob->flags & CF_SHUTW) { |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 250 | conn_xprt_close(&si->conn); |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 251 | if (conn->ctrl) |
| 252 | fd_delete(si_fd(si)); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 253 | si->state = SI_ST_DIS; |
| 254 | si->exp = TICK_ETERNITY; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 255 | |
Willy Tarreau | d8ccffe | 2010-09-07 16:16:50 +0200 | [diff] [blame] | 256 | if (si->release) |
| 257 | si->release(si); |
| 258 | } |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 259 | else if (si->flags & SI_FL_NOHALF) { |
| 260 | /* we want to immediately forward this close to the write side */ |
| 261 | return stream_int_shutw(si); |
| 262 | } |
| 263 | else if (conn->ctrl) { |
| 264 | /* we want the caller to disable polling on this FD */ |
| 265 | return 1; |
| 266 | } |
Willy Tarreau | 0bd05ea | 2010-07-02 11:18:03 +0200 | [diff] [blame] | 267 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 268 | /* note that if the task exists, it must unregister itself once it runs */ |
| 269 | if (!conn->ctrl && !(si->flags & SI_FL_DONT_WAKE) && si->owner) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 270 | task_wakeup(si->owner, TASK_WOKEN_IO); |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 271 | return 0; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 272 | } |
| 273 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 274 | /* |
| 275 | * This function performs a shutdown-write on a stream interface in a connected or |
| 276 | * init state (it does nothing for other states). It either shuts the write side |
| 277 | * or marks itself as closed. The buffer flags are updated to reflect the new state. |
| 278 | * It does also close everything if the SI was marked as being in error state. If |
| 279 | * there is a data-layer shutdown, it is called. If a control layer is defined, then |
| 280 | * it is supposed to be a socket layer and file descriptors are then shutdown or |
| 281 | * closed accordingly. If no control layer is defined, then the SI is supposed to |
| 282 | * be an embedded one and the owner task is woken up if it exists. The function |
| 283 | * does not disable polling on the FD by itself, it returns non-zero instead if |
| 284 | * the caller needs to do so (except when the FD is deleted where this is implicit). |
| 285 | */ |
| 286 | int stream_int_shutw(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 287 | { |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 288 | struct connection *conn = &si->conn; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 289 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 290 | si->ob->flags &= ~CF_SHUTW_NOW; |
| 291 | if (si->ob->flags & CF_SHUTW) |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 292 | return 0; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 293 | si->ob->flags |= CF_SHUTW; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 294 | si->ob->wex = TICK_ETERNITY; |
| 295 | si->flags &= ~SI_FL_WAIT_DATA; |
| 296 | |
| 297 | switch (si->state) { |
| 298 | case SI_ST_EST: |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 299 | /* we have to shut before closing, otherwise some short messages |
| 300 | * may never leave the system, especially when there are remaining |
| 301 | * unread data in the socket input buffer, or when nolinger is set. |
| 302 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 303 | * no risk so we close both sides immediately. |
| 304 | */ |
| 305 | if (si->flags & SI_FL_ERR) { |
| 306 | /* quick close, the socket is already shut. Remove pending flags. */ |
| 307 | si->flags &= ~SI_FL_NOLINGER; |
| 308 | } else if (si->flags & SI_FL_NOLINGER) { |
| 309 | si->flags &= ~SI_FL_NOLINGER; |
| 310 | if (conn->ctrl) { |
| 311 | setsockopt(si_fd(si), SOL_SOCKET, SO_LINGER, |
| 312 | (struct linger *) &nolinger, sizeof(struct linger)); |
| 313 | } |
| 314 | /* unclean data-layer shutdown */ |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 315 | if (conn->xprt && conn->xprt->shutw) |
| 316 | conn->xprt->shutw(conn, 0); |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 317 | } else { |
| 318 | /* clean data-layer shutdown */ |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 319 | if (conn->xprt && conn->xprt->shutw) |
| 320 | conn->xprt->shutw(conn, 1); |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 321 | |
| 322 | if (!(si->flags & SI_FL_NOHALF)) { |
| 323 | /* We shutdown transport layer */ |
| 324 | if (conn->ctrl) |
| 325 | shutdown(si_fd(si), SHUT_WR); |
| 326 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 327 | if (!(si->ib->flags & (CF_SHUTR|CF_DONT_READ))) { |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 328 | /* OK just a shutw, but we want the caller |
| 329 | * to disable polling on this FD if exists. |
| 330 | */ |
| 331 | return !!conn->ctrl; |
| 332 | } |
| 333 | } |
| 334 | } |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 335 | |
| 336 | /* fall through */ |
| 337 | case SI_ST_CON: |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 338 | /* we may have to close a pending connection, and mark the |
| 339 | * response buffer as shutr |
| 340 | */ |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 341 | conn_xprt_close(&si->conn); |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 342 | if (conn->ctrl) |
| 343 | fd_delete(si_fd(si)); |
| 344 | /* fall through */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 345 | case SI_ST_CER: |
Willy Tarreau | 32d3ee9 | 2010-12-29 14:03:02 +0100 | [diff] [blame] | 346 | case SI_ST_QUE: |
| 347 | case SI_ST_TAR: |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 348 | si->state = SI_ST_DIS; |
Willy Tarreau | d8ccffe | 2010-09-07 16:16:50 +0200 | [diff] [blame] | 349 | |
| 350 | if (si->release) |
| 351 | si->release(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 352 | default: |
| 353 | si->flags &= ~SI_FL_WAIT_ROOM; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 354 | si->ib->flags |= CF_SHUTR; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 355 | si->ib->rex = TICK_ETERNITY; |
| 356 | si->exp = TICK_ETERNITY; |
| 357 | } |
| 358 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 359 | /* note that if the task exists, it must unregister itself once it runs */ |
| 360 | if (!conn->ctrl && !(si->flags & SI_FL_DONT_WAKE) && si->owner) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 361 | task_wakeup(si->owner, TASK_WOKEN_IO); |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 362 | return 0; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 363 | } |
| 364 | |
| 365 | /* default chk_rcv function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 366 | static void stream_int_chk_rcv(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 367 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 368 | struct channel *ib = si->ib; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 369 | |
| 370 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 371 | __FUNCTION__, |
| 372 | si, si->state, si->ib->flags, si->ob->flags); |
| 373 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 374 | if (unlikely(si->state != SI_ST_EST || (ib->flags & (CF_SHUTR|CF_HIJACK|CF_DONT_READ)))) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 375 | return; |
| 376 | |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 377 | if (channel_full(ib)) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 378 | /* stop reading */ |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 379 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 380 | } |
| 381 | else { |
| 382 | /* (re)start reading */ |
| 383 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 384 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 385 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | /* default chk_snd function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 390 | static void stream_int_chk_snd(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 391 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 392 | struct channel *ob = si->ob; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 393 | |
| 394 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 395 | __FUNCTION__, |
| 396 | si, si->state, si->ib->flags, si->ob->flags); |
| 397 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 398 | if (unlikely(si->state != SI_ST_EST || (si->ob->flags & CF_SHUTW))) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 399 | return; |
| 400 | |
| 401 | if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 402 | channel_is_empty(ob)) /* called with nothing to send ! */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 403 | return; |
| 404 | |
| 405 | /* Otherwise there are remaining data to be sent in the buffer, |
| 406 | * so we tell the handler. |
| 407 | */ |
| 408 | si->flags &= ~SI_FL_WAIT_DATA; |
| 409 | if (!tick_isset(ob->wex)) |
| 410 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 411 | |
| 412 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 413 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 414 | } |
| 415 | |
Willy Tarreau | b24281b | 2011-02-13 13:16:36 +0100 | [diff] [blame] | 416 | /* 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] | 417 | * 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] | 418 | * 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] | 419 | * function before returning. It must be deleted by the task handler using |
Willy Tarreau | b24281b | 2011-02-13 13:16:36 +0100 | [diff] [blame] | 420 | * stream_int_unregister_handler(), possibly from within the function itself. |
Willy Tarreau | fa6bac6 | 2012-05-31 14:16:59 +0200 | [diff] [blame] | 421 | * It also pre-initializes applet.state to zero and the connection context |
| 422 | * to NULL. |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 423 | */ |
Willy Tarreau | b24281b | 2011-02-13 13:16:36 +0100 | [diff] [blame] | 424 | 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] | 425 | { |
Simon Horman | 7abd00d | 2011-08-13 08:03:51 +0900 | [diff] [blame] | 426 | 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] | 427 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 428 | si_prepare_embedded(si); |
Willy Tarreau | 3cefd52 | 2012-08-30 15:49:18 +0200 | [diff] [blame] | 429 | set_target_applet(&si->conn.target, app); |
Aman Gupta | 9a13e84 | 2012-04-02 18:57:53 -0700 | [diff] [blame] | 430 | si->release = app->release; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 431 | si->flags |= SI_FL_WAIT_DATA; |
| 432 | return si->owner; |
| 433 | } |
| 434 | |
| 435 | /* Register a function to handle a stream_interface as a standalone task. The |
| 436 | * new task itself is returned and is assigned as si->owner. The stream_interface |
| 437 | * pointer will be pointed to by the task's context. The handler can be detached |
| 438 | * by using stream_int_unregister_handler(). |
Willy Tarreau | 7c0a151 | 2011-03-10 11:17:02 +0100 | [diff] [blame] | 439 | * FIXME: the code should be updated to ensure that we don't change si->owner |
| 440 | * anymore as this is not needed. However, process_session still relies on it. |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 441 | */ |
| 442 | struct task *stream_int_register_handler_task(struct stream_interface *si, |
| 443 | struct task *(*fct)(struct task *)) |
| 444 | { |
| 445 | struct task *t; |
| 446 | |
| 447 | DPRINTF(stderr, "registering handler %p for si %p (was %p)\n", fct, si, si->owner); |
| 448 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 449 | si_prepare_task(si); |
Willy Tarreau | 3cefd52 | 2012-08-30 15:49:18 +0200 | [diff] [blame] | 450 | clear_target(&si->conn.target); |
Willy Tarreau | 0bd05ea | 2010-07-02 11:18:03 +0200 | [diff] [blame] | 451 | si->release = NULL; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 452 | si->flags |= SI_FL_WAIT_DATA; |
| 453 | |
| 454 | t = task_new(); |
| 455 | si->owner = t; |
| 456 | if (!t) |
| 457 | return t; |
Willy Tarreau | 7c0a151 | 2011-03-10 11:17:02 +0100 | [diff] [blame] | 458 | |
Willy Tarreau | 3cefd52 | 2012-08-30 15:49:18 +0200 | [diff] [blame] | 459 | set_target_task(&si->conn.target, t); |
Willy Tarreau | 7c0a151 | 2011-03-10 11:17:02 +0100 | [diff] [blame] | 460 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 461 | t->process = fct; |
| 462 | t->context = si; |
| 463 | task_wakeup(si->owner, TASK_WOKEN_INIT); |
| 464 | |
| 465 | return t; |
| 466 | } |
| 467 | |
| 468 | /* Unregister a stream interface handler. This must be called by the handler task |
| 469 | * itself when it detects that it is in the SI_ST_DIS state. This function can |
| 470 | * both detach standalone handlers and embedded handlers. |
| 471 | */ |
| 472 | void stream_int_unregister_handler(struct stream_interface *si) |
| 473 | { |
Willy Tarreau | 3cefd52 | 2012-08-30 15:49:18 +0200 | [diff] [blame] | 474 | if (si->conn.target.type == TARG_TYPE_TASK) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 475 | /* external handler : kill the task */ |
Willy Tarreau | 3cefd52 | 2012-08-30 15:49:18 +0200 | [diff] [blame] | 476 | task_delete(si->conn.target.ptr.t); |
| 477 | task_free(si->conn.target.ptr.t); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 478 | } |
Willy Tarreau | 0bd05ea | 2010-07-02 11:18:03 +0200 | [diff] [blame] | 479 | si->release = NULL; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 480 | si->owner = NULL; |
Willy Tarreau | 3cefd52 | 2012-08-30 15:49:18 +0200 | [diff] [blame] | 481 | clear_target(&si->conn.target); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 482 | } |
| 483 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 484 | /* 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] | 485 | * established. It returns 0 if it fails in a fatal way or needs to poll to go |
| 486 | * 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] | 487 | * flags (the bit is provided in <flag> by the caller). It is designed to be |
| 488 | * 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] | 489 | */ |
| 490 | int conn_si_send_proxy(struct connection *conn, unsigned int flag) |
| 491 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 492 | struct stream_interface *si = conn->owner; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 493 | |
| 494 | /* we might have been called just after an asynchronous shutw */ |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 495 | if (conn->flags & CO_FL_SOCK_WR_SH) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 496 | goto out_error; |
| 497 | |
| 498 | /* If we have a PROXY line to send, we'll use this to validate the |
| 499 | * connection, in which case the connection is validated only once |
| 500 | * we've sent the whole proxy line. Otherwise we use connect(). |
| 501 | */ |
| 502 | if (si->send_proxy_ofs) { |
| 503 | int ret; |
| 504 | |
| 505 | /* The target server expects a PROXY line to be sent first. |
| 506 | * If the send_proxy_ofs is negative, it corresponds to the |
| 507 | * offset to start sending from then end of the proxy string |
| 508 | * (which is recomputed every time since it's constant). If |
| 509 | * it is positive, it means we have to send from the start. |
| 510 | */ |
Willy Tarreau | 986a9d2 | 2012-08-30 21:11:38 +0200 | [diff] [blame] | 511 | ret = make_proxy_line(trash, trashlen, &si->ob->prod->conn.addr.from, &si->ob->prod->conn.addr.to); |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 512 | if (!ret) |
| 513 | goto out_error; |
| 514 | |
| 515 | if (si->send_proxy_ofs > 0) |
| 516 | si->send_proxy_ofs = -ret; /* first call */ |
| 517 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 518 | /* we have to send trash from (ret+sp for -sp bytes). If the |
| 519 | * data layer has a pending write, we'll also set MSG_MORE. |
| 520 | */ |
| 521 | ret = send(conn->t.sock.fd, trash + ret + si->send_proxy_ofs, -si->send_proxy_ofs, |
| 522 | (conn->flags & CO_FL_DATA_WR_ENA) ? MSG_MORE : 0); |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 523 | |
| 524 | if (ret == 0) |
| 525 | goto out_wait; |
| 526 | |
| 527 | if (ret < 0) { |
| 528 | if (errno == EAGAIN) |
| 529 | goto out_wait; |
| 530 | goto out_error; |
| 531 | } |
| 532 | |
| 533 | si->send_proxy_ofs += ret; /* becomes zero once complete */ |
| 534 | if (si->send_proxy_ofs != 0) |
| 535 | goto out_wait; |
| 536 | |
| 537 | /* OK we've sent the whole line, we're connected */ |
| 538 | } |
| 539 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 540 | /* The connection is ready now, simply return and let the connection |
| 541 | * handler notify upper layers if needed. |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 542 | */ |
| 543 | if (conn->flags & CO_FL_WAIT_L4_CONN) |
| 544 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 545 | conn->flags &= ~flag; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 546 | return 1; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 547 | |
| 548 | out_error: |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 549 | /* Write error on the file descriptor */ |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 550 | conn->flags |= CO_FL_ERROR; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 551 | conn->flags &= ~flag; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 552 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 553 | |
| 554 | out_wait: |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 555 | __conn_sock_stop_recv(conn); |
| 556 | __conn_sock_poll_send(conn); |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 557 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 558 | } |
| 559 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 560 | /* 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^] | 561 | * 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] | 562 | * 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] | 563 | * an important event requires special handling. It relies on the connection handler |
| 564 | * to commit any polling updates. |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 565 | */ |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame^] | 566 | static void si_conn_wake_cb(struct connection *conn) |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 567 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 568 | struct stream_interface *si = conn->owner; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 569 | |
| 570 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 571 | __FUNCTION__, |
| 572 | si, si->state, si->ib->flags, si->ob->flags); |
| 573 | |
Willy Tarreau | 3c55ec2 | 2012-07-23 19:19:51 +0200 | [diff] [blame] | 574 | if (conn->flags & CO_FL_ERROR) |
| 575 | si->flags |= SI_FL_ERR; |
| 576 | |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 577 | /* check for recent connection establishment */ |
Willy Tarreau | c76ae33 | 2012-07-12 15:32:13 +0200 | [diff] [blame] | 578 | 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] | 579 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 580 | si->ob->flags |= CF_WRITE_NULL; |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 581 | } |
| 582 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 583 | /* process consumer side */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 584 | if (channel_is_empty(si->ob)) { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 585 | if (((si->ob->flags & (CF_SHUTW|CF_HIJACK|CF_SHUTW_NOW)) == CF_SHUTW_NOW) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 586 | (si->state == SI_ST_EST)) |
| 587 | stream_int_shutw(si); |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 588 | __conn_data_stop_send(conn); |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 589 | si->ob->wex = TICK_ETERNITY; |
| 590 | } |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 591 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 592 | if ((si->ob->flags & (CF_SHUTW|CF_SHUTW_NOW|CF_HIJACK)) == 0 && !channel_full(si->ob)) |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 593 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 594 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 595 | if (si->ob->flags & CF_WRITE_ACTIVITY) { |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 596 | /* update timeouts if we have written something */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 597 | if ((si->ob->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 598 | !channel_is_empty(si->ob)) |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 599 | if (tick_isset(si->ob->wex)) |
| 600 | si->ob->wex = tick_add_ifset(now_ms, si->ob->wto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 601 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 602 | if (!(si->flags & SI_FL_INDEP_STR)) |
| 603 | if (tick_isset(si->ib->rex)) |
| 604 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 605 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 606 | 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] | 607 | !channel_full(si->ob) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 608 | (si->ob->prod->flags & SI_FL_WAIT_ROOM))) |
| 609 | si_chk_rcv(si->ob->prod); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 610 | } |
| 611 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 612 | /* process producer side. |
| 613 | * We might have some data the consumer is waiting for. |
| 614 | * We can do fast-forwarding, but we avoid doing this for partial |
| 615 | * buffers, because it is very likely that it will be done again |
| 616 | * immediately afterwards once the following data is parsed (eg: |
| 617 | * HTTP chunking). |
| 618 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 619 | if (((si->ib->flags & CF_READ_PARTIAL) && !channel_is_empty(si->ib)) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 620 | (si->ib->pipe /* always try to send spliced data */ || |
| 621 | (si->ib->buf.i == 0 && (si->ib->cons->flags & SI_FL_WAIT_DATA)))) { |
| 622 | int last_len = si->ib->pipe ? si->ib->pipe->data : 0; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 623 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 624 | si_chk_snd(si->ib->cons); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 625 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 626 | /* check if the consumer has freed some space either in the |
| 627 | * buffer or in the pipe. |
| 628 | */ |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 629 | if (!channel_full(si->ib) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 630 | (!last_len || !si->ib->pipe || si->ib->pipe->data < last_len)) |
| 631 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 632 | } |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 633 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 634 | if (si->flags & SI_FL_WAIT_ROOM) { |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 635 | __conn_data_stop_recv(conn); |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 636 | si->ib->rex = TICK_ETERNITY; |
| 637 | } |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 638 | else if ((si->ib->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ|CF_READ_NOEXP)) == CF_READ_PARTIAL && |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 639 | !channel_full(si->ib)) { |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 640 | if (tick_isset(si->ib->rex)) |
| 641 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 642 | } |
| 643 | |
| 644 | /* wake the task up only when needed */ |
| 645 | if (/* changes on the production side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 646 | (si->ib->flags & (CF_READ_NULL|CF_READ_ERROR)) || |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 647 | si->state != SI_ST_EST || |
| 648 | (si->flags & SI_FL_ERR) || |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 649 | ((si->ib->flags & CF_READ_PARTIAL) && |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 650 | (!si->ib->to_forward || si->ib->cons->state != SI_ST_EST)) || |
| 651 | |
| 652 | /* changes on the consumption side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 653 | (si->ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) || |
| 654 | ((si->ob->flags & CF_WRITE_ACTIVITY) && |
| 655 | ((si->ob->flags & CF_SHUTW) || |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 656 | si->ob->prod->state != SI_ST_EST || |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 657 | (channel_is_empty(si->ob) && !si->ob->to_forward)))) { |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 658 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 659 | } |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 660 | if (si->ib->flags & CF_READ_ACTIVITY) |
| 661 | si->ib->flags &= ~CF_READ_DONTWAIT; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 662 | } |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 663 | |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 664 | /* |
| 665 | * This function is called to send buffer data to a stream socket. |
| 666 | * It returns -1 in case of unrecoverable error, otherwise zero. |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 667 | * It iterates the transport layer's snd_buf function. It relies on the |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 668 | * caller to commit polling changes. |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 669 | */ |
| 670 | static int si_conn_send_loop(struct connection *conn) |
| 671 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 672 | struct stream_interface *si = conn->owner; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 673 | struct channel *b = si->ob; |
| 674 | int write_poll = MAX_WRITE_POLL_LOOPS; |
| 675 | int ret; |
| 676 | |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 677 | if (b->pipe && conn->xprt->snd_pipe) { |
| 678 | ret = conn->xprt->snd_pipe(conn, b->pipe); |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 679 | if (ret > 0) |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 680 | b->flags |= CF_WRITE_PARTIAL; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 681 | |
| 682 | if (!b->pipe->data) { |
| 683 | put_pipe(b->pipe); |
| 684 | b->pipe = NULL; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 685 | } |
| 686 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 687 | if (conn->flags & CO_FL_ERROR) |
| 688 | return -1; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 689 | } |
| 690 | |
| 691 | /* At this point, the pipe is empty, but we may still have data pending |
| 692 | * in the normal buffer. |
| 693 | */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 694 | if (!b->buf.o) |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 695 | return 0; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 696 | |
| 697 | /* when we're in this loop, we already know that there is no spliced |
| 698 | * data left, and that there are sendable buffered data. |
| 699 | */ |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 700 | while (!(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] | 701 | /* check if we want to inform the kernel that we're interested in |
| 702 | * sending more data after this call. We want this if : |
| 703 | * - we're about to close after this last send and want to merge |
| 704 | * the ongoing FIN with the last segment. |
| 705 | * - we know we can't send everything at once and must get back |
| 706 | * here because of unaligned data |
| 707 | * - there is still a finite amount of data to forward |
| 708 | * The test is arranged so that the most common case does only 2 |
| 709 | * tests. |
| 710 | */ |
| 711 | unsigned int send_flag = MSG_DONTWAIT | MSG_NOSIGNAL; |
| 712 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 713 | if ((!(b->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) && |
| 714 | ((b->to_forward && b->to_forward != CHN_INFINITE_FORWARD) || |
| 715 | (b->flags & CF_EXPECT_MORE))) || |
| 716 | ((b->flags & (CF_SHUTW|CF_SHUTW_NOW|CF_HIJACK)) == CF_SHUTW_NOW)) |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 717 | send_flag |= MSG_MORE; |
| 718 | |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 719 | ret = conn->xprt->snd_buf(conn, &b->buf, send_flag); |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 720 | if (ret <= 0) |
| 721 | break; |
| 722 | |
| 723 | if (si->conn.flags & CO_FL_WAIT_L4_CONN) |
| 724 | si->conn.flags &= ~CO_FL_WAIT_L4_CONN; |
| 725 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 726 | b->flags |= CF_WRITE_PARTIAL; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 727 | |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 728 | if (!b->buf.o) { |
| 729 | /* Always clear both flags once everything has been sent, they're one-shot */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 730 | b->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT); |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 731 | break; |
| 732 | } |
| 733 | |
| 734 | if (--write_poll <= 0) |
| 735 | break; |
| 736 | } /* while */ |
| 737 | |
| 738 | if (conn->flags & CO_FL_ERROR) |
| 739 | return -1; |
| 740 | |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 741 | return 0; |
| 742 | } |
| 743 | |
| 744 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 745 | /* Updates the timers and flags of a stream interface attached to a connection, |
| 746 | * depending on the buffers' flags. It should only be called once after the |
| 747 | * buffer flags have settled down, and before they are cleared. It doesn't |
| 748 | * harm to call it as often as desired (it just slightly hurts performance). |
| 749 | * It is only meant to be called by upper layers after buffer flags have been |
| 750 | * manipulated by analysers. |
| 751 | */ |
| 752 | void stream_int_update_conn(struct stream_interface *si) |
| 753 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 754 | struct channel *ib = si->ib; |
| 755 | struct channel *ob = si->ob; |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 756 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 757 | /* Check if we need to close the read side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 758 | if (!(ib->flags & CF_SHUTR)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 759 | /* Read not closed, update FD status and timeout for reads */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 760 | if ((ib->flags & (CF_HIJACK|CF_DONT_READ)) || channel_full(ib)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 761 | /* stop reading */ |
| 762 | if (!(si->flags & SI_FL_WAIT_ROOM)) { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 763 | if (!(ib->flags & (CF_HIJACK|CF_DONT_READ))) /* full */ |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 764 | si->flags |= SI_FL_WAIT_ROOM; |
| 765 | conn_data_stop_recv(&si->conn); |
| 766 | ib->rex = TICK_ETERNITY; |
| 767 | } |
| 768 | } |
| 769 | else { |
| 770 | /* (re)start reading and update timeout. Note: we don't recompute the timeout |
| 771 | * everytime we get here, otherwise it would risk never to expire. We only |
| 772 | * update it if is was not yet set. The stream socket handler will already |
| 773 | * have updated it if there has been a completed I/O. |
| 774 | */ |
| 775 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 776 | conn_data_want_recv(&si->conn); |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 777 | 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] | 778 | ib->rex = tick_add_ifset(now_ms, ib->rto); |
| 779 | } |
| 780 | } |
| 781 | |
| 782 | /* Check if we need to close the write side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 783 | if (!(ob->flags & CF_SHUTW)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 784 | /* Write not closed, update FD status and timeout for writes */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 785 | if (channel_is_empty(ob)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 786 | /* stop writing */ |
| 787 | if (!(si->flags & SI_FL_WAIT_DATA)) { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 788 | if ((ob->flags & (CF_HIJACK|CF_SHUTW_NOW)) == 0) |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 789 | si->flags |= SI_FL_WAIT_DATA; |
| 790 | conn_data_stop_send(&si->conn); |
| 791 | ob->wex = TICK_ETERNITY; |
| 792 | } |
| 793 | } |
| 794 | else { |
| 795 | /* (re)start writing and update timeout. Note: we don't recompute the timeout |
| 796 | * everytime we get here, otherwise it would risk never to expire. We only |
| 797 | * update it if is was not yet set. The stream socket handler will already |
| 798 | * have updated it if there has been a completed I/O. |
| 799 | */ |
| 800 | si->flags &= ~SI_FL_WAIT_DATA; |
| 801 | conn_data_want_send(&si->conn); |
| 802 | if (!tick_isset(ob->wex)) { |
| 803 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 804 | if (tick_isset(ib->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
| 805 | /* Note: depending on the protocol, we don't know if we're waiting |
| 806 | * for incoming data or not. So in order to prevent the socket from |
| 807 | * expiring read timeouts during writes, we refresh the read timeout, |
| 808 | * except if it was already infinite or if we have explicitly setup |
| 809 | * independent streams. |
| 810 | */ |
| 811 | ib->rex = tick_add_ifset(now_ms, ib->rto); |
| 812 | } |
| 813 | } |
| 814 | } |
| 815 | } |
| 816 | } |
| 817 | |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 818 | /* This function is used for inter-stream-interface calls. It is called by the |
| 819 | * consumer to inform the producer side that it may be interested in checking |
| 820 | * for free space in the buffer. Note that it intentionally does not update |
| 821 | * timeouts, so that we can still check them later at wake-up. This function is |
| 822 | * dedicated to connection-based stream interfaces. |
| 823 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 824 | static void stream_int_chk_rcv_conn(struct stream_interface *si) |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 825 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 826 | struct channel *ib = si->ib; |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 827 | |
Willy Tarreau | 34ffd77 | 2012-09-03 16:51:27 +0200 | [diff] [blame] | 828 | if (unlikely(si->state > SI_ST_EST || (ib->flags & CF_SHUTR))) |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 829 | return; |
| 830 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 831 | if ((ib->flags & (CF_HIJACK|CF_DONT_READ)) || channel_full(ib)) { |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 832 | /* stop reading */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 833 | if (!(ib->flags & (CF_HIJACK|CF_DONT_READ))) /* full */ |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 834 | si->flags |= SI_FL_WAIT_ROOM; |
| 835 | conn_data_stop_recv(&si->conn); |
| 836 | } |
| 837 | else { |
| 838 | /* (re)start reading */ |
| 839 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 840 | conn_data_want_recv(&si->conn); |
| 841 | } |
| 842 | } |
| 843 | |
| 844 | |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 845 | /* This function is used for inter-stream-interface calls. It is called by the |
| 846 | * producer to inform the consumer side that it may be interested in checking |
| 847 | * for data in the buffer. Note that it intentionally does not update timeouts, |
| 848 | * so that we can still check them later at wake-up. |
| 849 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 850 | static void stream_int_chk_snd_conn(struct stream_interface *si) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 851 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 852 | struct channel *ob = si->ob; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 853 | |
Willy Tarreau | 34ffd77 | 2012-09-03 16:51:27 +0200 | [diff] [blame] | 854 | if (unlikely(si->state > SI_ST_EST || (ob->flags & CF_SHUTW))) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 855 | return; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 856 | |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 857 | if (unlikely(channel_is_empty(ob))) /* called with nothing to send ! */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 858 | return; |
| 859 | |
| 860 | if (!ob->pipe && /* spliced data wants to be forwarded ASAP */ |
| 861 | (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */ |
| 862 | (fdtab[si_fd(si)].ev & FD_POLL_OUT))) /* we'll be called anyway */ |
| 863 | return; |
| 864 | |
Willy Tarreau | 34ffd77 | 2012-09-03 16:51:27 +0200 | [diff] [blame] | 865 | if (!(si->conn.flags & CO_FL_HANDSHAKE) && si_conn_send_loop(&si->conn) < 0) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 866 | /* Write error on the file descriptor. We mark the FD as STERROR so |
| 867 | * that we don't use it anymore and we notify the task. |
| 868 | */ |
| 869 | fdtab[si_fd(si)].ev &= ~FD_POLL_STICKY; |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 870 | __conn_data_stop_both(&si->conn); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 871 | si->flags |= SI_FL_ERR; |
| 872 | si->conn.flags |= CO_FL_ERROR; |
| 873 | goto out_wakeup; |
| 874 | } |
| 875 | |
| 876 | /* OK, so now we know that some data might have been sent, and that we may |
| 877 | * have to poll first. We have to do that too if the buffer is not empty. |
| 878 | */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 879 | if (channel_is_empty(ob)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 880 | /* the connection is established but we can't write. Either the |
| 881 | * buffer is empty, or we just refrain from sending because the |
| 882 | * ->o limit was reached. Maybe we just wrote the last |
| 883 | * chunk and need to close. |
| 884 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 885 | if (((ob->flags & (CF_SHUTW|CF_HIJACK|CF_AUTO_CLOSE|CF_SHUTW_NOW)) == |
| 886 | (CF_AUTO_CLOSE|CF_SHUTW_NOW)) && |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 887 | (si->state == SI_ST_EST)) { |
| 888 | si_shutw(si); |
| 889 | goto out_wakeup; |
| 890 | } |
| 891 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 892 | if ((ob->flags & (CF_SHUTW|CF_SHUTW_NOW|CF_HIJACK)) == 0) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 893 | si->flags |= SI_FL_WAIT_DATA; |
| 894 | ob->wex = TICK_ETERNITY; |
| 895 | } |
| 896 | else { |
| 897 | /* Otherwise there are remaining data to be sent in the buffer, |
| 898 | * which means we have to poll before doing so. |
| 899 | */ |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 900 | __conn_data_want_send(&si->conn); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 901 | si->flags &= ~SI_FL_WAIT_DATA; |
| 902 | if (!tick_isset(ob->wex)) |
| 903 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 904 | } |
| 905 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 906 | if (likely(ob->flags & CF_WRITE_ACTIVITY)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 907 | /* update timeout if we have written something */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 908 | if ((ob->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 909 | !channel_is_empty(ob)) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 910 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 911 | |
| 912 | if (tick_isset(si->ib->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
| 913 | /* Note: to prevent the client from expiring read timeouts |
| 914 | * during writes, we refresh it. We only do this if the |
| 915 | * interface is not configured for "independent streams", |
| 916 | * because for some applications it's better not to do this, |
| 917 | * for instance when continuously exchanging small amounts |
| 918 | * of data which can full the socket buffers long before a |
| 919 | * write timeout is detected. |
| 920 | */ |
| 921 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
| 922 | } |
| 923 | } |
| 924 | |
| 925 | /* in case of special condition (error, shutdown, end of write...), we |
| 926 | * have to notify the task. |
| 927 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 928 | if (likely((ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) || |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 929 | (channel_is_empty(ob) && !ob->to_forward) || |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 930 | si->state != SI_ST_EST)) { |
| 931 | out_wakeup: |
| 932 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 933 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 934 | } |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 935 | |
| 936 | /* commit possible polling changes */ |
| 937 | conn_cond_update_polling(&si->conn); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 938 | } |
| 939 | |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 940 | /* |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 941 | * 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] | 942 | * into the buffer from the connection. It iterates over the transport layer's |
| 943 | * rcv_buf function. |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 944 | */ |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame^] | 945 | static void si_conn_recv_cb(struct connection *conn) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 946 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 947 | struct stream_interface *si = conn->owner; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 948 | struct channel *b = si->ib; |
| 949 | int ret, max, cur_read; |
| 950 | int read_poll = MAX_READ_POLL_LOOPS; |
| 951 | |
| 952 | /* stop immediately on errors. Note that we DON'T want to stop on |
| 953 | * POLL_ERR, as the poller might report a write error while there |
| 954 | * are still data available in the recv buffer. This typically |
| 955 | * happens when we send too large a request to a backend server |
| 956 | * which rejects it before reading it all. |
| 957 | */ |
| 958 | if (conn->flags & CO_FL_ERROR) |
| 959 | goto out_error; |
| 960 | |
| 961 | /* stop here if we reached the end of data */ |
| 962 | if (conn_data_read0_pending(conn)) |
| 963 | goto out_shutdown_r; |
| 964 | |
| 965 | /* maybe we were called immediately after an asynchronous shutr */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 966 | if (b->flags & CF_SHUTR) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 967 | return; |
| 968 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 969 | cur_read = 0; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 970 | |
| 971 | /* First, let's see if we may splice data across the channel without |
| 972 | * using a buffer. |
| 973 | */ |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 974 | if (conn->xprt->rcv_pipe && |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 975 | b->to_forward >= MIN_SPLICE_FORWARD && b->flags & CF_KERN_SPLICING) { |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 976 | if (buffer_not_empty(&b->buf)) { |
| 977 | /* We're embarrassed, there are already data pending in |
| 978 | * the buffer and we don't want to have them at two |
| 979 | * locations at a time. Let's indicate we need some |
| 980 | * place and ask the consumer to hurry. |
| 981 | */ |
| 982 | goto abort_splice; |
| 983 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 984 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 985 | if (unlikely(b->pipe == NULL)) { |
| 986 | if (pipes_used >= global.maxpipes || !(b->pipe = get_pipe())) { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 987 | b->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 988 | goto abort_splice; |
| 989 | } |
| 990 | } |
| 991 | |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 992 | ret = conn->xprt->rcv_pipe(conn, b->pipe, b->to_forward); |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 993 | if (ret < 0) { |
| 994 | /* splice not supported on this end, let's disable it */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 995 | b->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 996 | goto abort_splice; |
| 997 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 998 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 999 | if (ret > 0) { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1000 | if (b->to_forward != CHN_INFINITE_FORWARD) |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1001 | b->to_forward -= ret; |
| 1002 | b->total += ret; |
| 1003 | cur_read += ret; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1004 | b->flags |= CF_READ_PARTIAL; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1005 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1006 | |
| 1007 | if (conn_data_read0_pending(conn)) |
| 1008 | goto out_shutdown_r; |
| 1009 | |
| 1010 | if (conn->flags & CO_FL_ERROR) |
| 1011 | goto out_error; |
| 1012 | |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1013 | if (conn->flags & CO_FL_WAIT_ROOM) /* most likely the pipe is full */ |
| 1014 | si->flags |= SI_FL_WAIT_ROOM; |
| 1015 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1016 | /* splice not possible (anymore), let's go on on standard copy */ |
| 1017 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1018 | |
| 1019 | abort_splice: |
| 1020 | /* release the pipe if we can, which is almost always the case */ |
| 1021 | if (b->pipe && !b->pipe->data) { |
| 1022 | put_pipe(b->pipe); |
| 1023 | b->pipe = NULL; |
| 1024 | } |
| 1025 | |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1026 | while (!b->pipe && !(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 | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1027 | max = bi_avail(b); |
| 1028 | |
| 1029 | if (!max) { |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1030 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1031 | break; |
| 1032 | } |
| 1033 | |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 1034 | ret = conn->xprt->rcv_buf(conn, &b->buf, max); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1035 | if (ret <= 0) |
| 1036 | break; |
| 1037 | |
| 1038 | cur_read += ret; |
| 1039 | |
| 1040 | /* if we're allowed to directly forward data, we must update ->o */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1041 | if (b->to_forward && !(b->flags & (CF_SHUTW|CF_SHUTW_NOW))) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1042 | unsigned long fwd = ret; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1043 | if (b->to_forward != CHN_INFINITE_FORWARD) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1044 | if (fwd > b->to_forward) |
| 1045 | fwd = b->to_forward; |
| 1046 | b->to_forward -= fwd; |
| 1047 | } |
Willy Tarreau | a75bcef | 2012-08-24 22:56:11 +0200 | [diff] [blame] | 1048 | b_adv(&b->buf, fwd); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1049 | } |
| 1050 | |
| 1051 | if (conn->flags & CO_FL_WAIT_L4_CONN) |
| 1052 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
| 1053 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1054 | b->flags |= CF_READ_PARTIAL; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1055 | b->total += ret; |
| 1056 | |
Willy Tarreau | ad1cc3d | 2012-08-27 18:54:20 +0200 | [diff] [blame] | 1057 | if (channel_full(b)) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1058 | /* The buffer is now full, there's no point in going through |
| 1059 | * the loop again. |
| 1060 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1061 | if (!(b->flags & CF_STREAMER_FAST) && (cur_read == buffer_len(&b->buf))) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1062 | b->xfer_small = 0; |
| 1063 | b->xfer_large++; |
| 1064 | if (b->xfer_large >= 3) { |
| 1065 | /* we call this buffer a fast streamer if it manages |
| 1066 | * to be filled in one call 3 consecutive times. |
| 1067 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1068 | b->flags |= (CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1069 | //fputc('+', stderr); |
| 1070 | } |
| 1071 | } |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1072 | else if ((b->flags & (CF_STREAMER | CF_STREAMER_FAST)) && |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1073 | (cur_read <= b->buf.size / 2)) { |
| 1074 | b->xfer_large = 0; |
| 1075 | b->xfer_small++; |
| 1076 | if (b->xfer_small >= 2) { |
| 1077 | /* if the buffer has been at least half full twice, |
| 1078 | * we receive faster than we send, so at least it |
| 1079 | * is not a "fast streamer". |
| 1080 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1081 | b->flags &= ~CF_STREAMER_FAST; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1082 | //fputc('-', stderr); |
| 1083 | } |
| 1084 | } |
| 1085 | else { |
| 1086 | b->xfer_small = 0; |
| 1087 | b->xfer_large = 0; |
| 1088 | } |
| 1089 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1090 | si->flags |= SI_FL_WAIT_ROOM; |
| 1091 | break; |
| 1092 | } |
| 1093 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1094 | if ((b->flags & CF_READ_DONTWAIT) || --read_poll <= 0) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1095 | break; |
| 1096 | |
| 1097 | /* if too many bytes were missing from last read, it means that |
| 1098 | * it's pointless trying to read again because the system does |
| 1099 | * not have them in buffers. |
| 1100 | */ |
| 1101 | if (ret < max) { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1102 | if ((b->flags & (CF_STREAMER | CF_STREAMER_FAST)) && |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1103 | (cur_read <= b->buf.size / 2)) { |
| 1104 | b->xfer_large = 0; |
| 1105 | b->xfer_small++; |
| 1106 | if (b->xfer_small >= 3) { |
| 1107 | /* we have read less than half of the buffer in |
| 1108 | * one pass, and this happened at least 3 times. |
| 1109 | * This is definitely not a streamer. |
| 1110 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1111 | b->flags &= ~(CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1112 | //fputc('!', stderr); |
| 1113 | } |
| 1114 | } |
| 1115 | |
| 1116 | /* if a streamer has read few data, it may be because we |
| 1117 | * have exhausted system buffers. It's not worth trying |
| 1118 | * again. |
| 1119 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1120 | if (b->flags & CF_STREAMER) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1121 | break; |
| 1122 | |
| 1123 | /* if we read a large block smaller than what we requested, |
| 1124 | * it's almost certain we'll never get anything more. |
| 1125 | */ |
| 1126 | if (ret >= global.tune.recv_enough) |
| 1127 | break; |
| 1128 | } |
| 1129 | } /* while !flags */ |
| 1130 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1131 | if (conn->flags & CO_FL_ERROR) |
| 1132 | goto out_error; |
| 1133 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1134 | if (conn_data_read0_pending(conn)) |
| 1135 | /* connection closed */ |
| 1136 | goto out_shutdown_r; |
| 1137 | |
| 1138 | return; |
| 1139 | |
| 1140 | out_shutdown_r: |
| 1141 | /* we received a shutdown */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1142 | b->flags |= CF_READ_NULL; |
| 1143 | if (b->flags & CF_AUTO_CLOSE) |
Willy Tarreau | 8263d2b | 2012-08-28 00:06:31 +0200 | [diff] [blame] | 1144 | channel_shutw_now(b); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1145 | stream_sock_read0(si); |
| 1146 | conn_data_read0(conn); |
| 1147 | return; |
| 1148 | |
| 1149 | out_error: |
| 1150 | /* Read error on the connection, report the error and stop I/O */ |
| 1151 | conn->flags |= CO_FL_ERROR; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1152 | } |
| 1153 | |
| 1154 | /* |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1155 | * 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] | 1156 | * from the buffer to the connection. It iterates over the transport layer's |
| 1157 | * snd_buf function. |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1158 | */ |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame^] | 1159 | static void si_conn_send_cb(struct connection *conn) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1160 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 1161 | struct stream_interface *si = conn->owner; |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 1162 | struct channel *b = si->ob; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1163 | |
| 1164 | if (conn->flags & CO_FL_ERROR) |
| 1165 | goto out_error; |
| 1166 | |
| 1167 | if (si->conn.flags & CO_FL_HANDSHAKE) |
| 1168 | /* a handshake was requested */ |
| 1169 | return; |
| 1170 | |
| 1171 | /* we might have been called just after an asynchronous shutw */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1172 | if (b->flags & CF_SHUTW) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1173 | return; |
| 1174 | |
| 1175 | /* OK there are data waiting to be sent */ |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 1176 | if (si_conn_send_loop(conn) < 0) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1177 | goto out_error; |
| 1178 | |
| 1179 | /* OK all done */ |
| 1180 | return; |
| 1181 | |
| 1182 | out_error: |
| 1183 | /* Write error on the connection, report the error and stop I/O */ |
| 1184 | conn->flags |= CO_FL_ERROR; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1185 | } |
| 1186 | |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1187 | /* |
| 1188 | * This function propagates a null read received on a socket-based connection. |
| 1189 | * It updates the stream interface. If the stream interface has SI_FL_NOHALF, |
| 1190 | * the close is also forwarded to the write side as an abort. This function is |
| 1191 | * still socket-specific as it handles a setsockopt() call to set the SO_LINGER |
| 1192 | * state on the socket. |
| 1193 | */ |
| 1194 | void stream_sock_read0(struct stream_interface *si) |
| 1195 | { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1196 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 1197 | if (si->ib->flags & CF_SHUTR) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1198 | return; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1199 | si->ib->flags |= CF_SHUTR; |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1200 | si->ib->rex = TICK_ETERNITY; |
| 1201 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 1202 | |
| 1203 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
| 1204 | return; |
| 1205 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1206 | if (si->ob->flags & CF_SHUTW) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1207 | goto do_close; |
| 1208 | |
| 1209 | if (si->flags & SI_FL_NOHALF) { |
| 1210 | /* we want to immediately forward this close to the write side */ |
| 1211 | if (si->flags & SI_FL_NOLINGER) { |
| 1212 | si->flags &= ~SI_FL_NOLINGER; |
| 1213 | setsockopt(si_fd(si), SOL_SOCKET, SO_LINGER, |
| 1214 | (struct linger *) &nolinger, sizeof(struct linger)); |
| 1215 | } |
| 1216 | /* force flag on ssl to keep session in cache */ |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 1217 | if (si->conn.xprt->shutw) |
| 1218 | si->conn.xprt->shutw(&si->conn, 0); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1219 | goto do_close; |
| 1220 | } |
| 1221 | |
| 1222 | /* otherwise that's just a normal read shutdown */ |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 1223 | __conn_data_stop_recv(&si->conn); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1224 | return; |
| 1225 | |
| 1226 | do_close: |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 1227 | conn_xprt_close(&si->conn); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1228 | fd_delete(si_fd(si)); |
| 1229 | si->state = SI_ST_DIS; |
| 1230 | si->exp = TICK_ETERNITY; |
| 1231 | if (si->release) |
| 1232 | si->release(si); |
| 1233 | return; |
| 1234 | } |
| 1235 | |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 1236 | /* |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 1237 | * Local variables: |
| 1238 | * c-indent-level: 8 |
| 1239 | * c-basic-offset: 8 |
| 1240 | * End: |
| 1241 | */ |