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 */ |
| 39 | static void stream_int_update(struct stream_interface *si); |
| 40 | static void stream_int_update_embedded(struct stream_interface *si); |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 41 | static void stream_int_chk_rcv(struct stream_interface *si); |
| 42 | static void stream_int_chk_snd(struct stream_interface *si); |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 43 | static void stream_int_update_conn(struct stream_interface *si); |
| 44 | static void stream_int_chk_rcv_conn(struct stream_interface *si); |
| 45 | static void stream_int_chk_snd_conn(struct stream_interface *si); |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 46 | static void si_conn_recv_cb(struct connection *conn); |
| 47 | static void si_conn_send_cb(struct connection *conn); |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 48 | static int si_conn_wake_cb(struct connection *conn); |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 49 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 50 | /* stream-interface operations for embedded tasks */ |
| 51 | struct si_ops si_embedded_ops = { |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 52 | .update = stream_int_update_embedded, |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 53 | .chk_rcv = stream_int_chk_rcv, |
| 54 | .chk_snd = stream_int_chk_snd, |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 55 | }; |
| 56 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 57 | /* stream-interface operations for external tasks */ |
| 58 | struct si_ops si_task_ops = { |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 59 | .update = stream_int_update, |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 60 | .chk_rcv = stream_int_chk_rcv, |
| 61 | .chk_snd = stream_int_chk_snd, |
Willy Tarreau | 5c979a9 | 2012-05-07 17:15:39 +0200 | [diff] [blame] | 62 | }; |
| 63 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 64 | /* stream-interface operations for connections */ |
| 65 | struct si_ops si_conn_ops = { |
| 66 | .update = stream_int_update_conn, |
| 67 | .chk_rcv = stream_int_chk_rcv_conn, |
| 68 | .chk_snd = stream_int_chk_snd_conn, |
| 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 scheduled tasks, not used for embedded tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 130 | static void stream_int_update(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 131 | { |
| 132 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 133 | __FUNCTION__, |
| 134 | si, si->state, si->ib->flags, si->ob->flags); |
| 135 | |
| 136 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 137 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 138 | } |
| 139 | |
| 140 | /* 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] | 141 | static void stream_int_update_embedded(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 142 | { |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 143 | int old_flags = si->flags; |
| 144 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 145 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 146 | __FUNCTION__, |
| 147 | si, si->state, si->ib->flags, si->ob->flags); |
| 148 | |
| 149 | if (si->state != SI_ST_EST) |
| 150 | return; |
| 151 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 152 | 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] | 153 | channel_is_empty(si->ob)) |
Willy Tarreau | 73b013b | 2012-05-21 16:31:45 +0200 | [diff] [blame] | 154 | si_shutw(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 155 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 156 | 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] | 157 | si->flags |= SI_FL_WAIT_DATA; |
| 158 | |
Willy Tarreau | 96fd4b5 | 2009-10-04 17:18:35 +0200 | [diff] [blame] | 159 | /* we're almost sure that we need some space if the buffer is not |
| 160 | * empty, even if it's not full, because the applets can't fill it. |
| 161 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 162 | 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] | 163 | si->flags |= SI_FL_WAIT_ROOM; |
| 164 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 165 | if (si->ob->flags & CF_WRITE_ACTIVITY) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 166 | if (tick_isset(si->ob->wex)) |
| 167 | si->ob->wex = tick_add_ifset(now_ms, si->ob->wto); |
| 168 | } |
| 169 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 170 | if (si->ib->flags & CF_READ_ACTIVITY || |
| 171 | (si->ob->flags & CF_WRITE_ACTIVITY && !(si->flags & SI_FL_INDEP_STR))) { |
Willy Tarreau | f27b5ea | 2009-10-03 22:01:18 +0200 | [diff] [blame] | 172 | if (tick_isset(si->ib->rex)) |
| 173 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
| 174 | } |
| 175 | |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 176 | /* save flags to detect changes */ |
| 177 | old_flags = si->flags; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 178 | 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] | 179 | !channel_full(si->ob) && |
Willy Tarreau | 96fd4b5 | 2009-10-04 17:18:35 +0200 | [diff] [blame] | 180 | (si->ob->prod->flags & SI_FL_WAIT_ROOM))) |
Willy Tarreau | 73b013b | 2012-05-21 16:31:45 +0200 | [diff] [blame] | 181 | si_chk_rcv(si->ob->prod); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 182 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 183 | if (((si->ib->flags & CF_READ_PARTIAL) && !channel_is_empty(si->ib)) && |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 184 | (si->ib->cons->flags & SI_FL_WAIT_DATA)) { |
Willy Tarreau | 73b013b | 2012-05-21 16:31:45 +0200 | [diff] [blame] | 185 | si_chk_snd(si->ib->cons); |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 186 | /* check if the consumer has freed some space */ |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 187 | if (!channel_full(si->ib)) |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 188 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 189 | } |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 190 | |
| 191 | /* Note that we're trying to wake up in two conditions here : |
| 192 | * - special event, which needs the holder task attention |
| 193 | * - status indicating that the applet can go on working. This |
| 194 | * is rather hard because we might be blocking on output and |
| 195 | * 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] | 196 | * to only rely on the changes the chk_* might have performed. |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 197 | */ |
| 198 | if (/* check stream interface changes */ |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 199 | ((old_flags & ~si->flags) & (SI_FL_WAIT_ROOM|SI_FL_WAIT_DATA)) || |
| 200 | |
| 201 | /* changes on the production side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 202 | (si->ib->flags & (CF_READ_NULL|CF_READ_ERROR)) || |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 203 | si->state != SI_ST_EST || |
| 204 | (si->flags & SI_FL_ERR) || |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 205 | ((si->ib->flags & CF_READ_PARTIAL) && |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 206 | (!si->ib->to_forward || si->ib->cons->state != SI_ST_EST)) || |
| 207 | |
| 208 | /* changes on the consumption side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 209 | (si->ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) || |
| 210 | ((si->ob->flags & CF_WRITE_ACTIVITY) && |
| 211 | ((si->ob->flags & CF_SHUTW) || |
Willy Tarreau | 3488e25 | 2010-08-09 16:24:56 +0200 | [diff] [blame] | 212 | si->ob->prod->state != SI_ST_EST || |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 213 | (channel_is_empty(si->ob) && !si->ob->to_forward)))) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 214 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 215 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 216 | } |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 217 | if (si->ib->flags & CF_READ_ACTIVITY) |
| 218 | si->ib->flags &= ~CF_READ_DONTWAIT; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 219 | } |
| 220 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 221 | /* |
| 222 | * This function performs a shutdown-read on a stream interface in a connected |
| 223 | * or init state (it does nothing for other states). It either shuts the read |
| 224 | * side or marks itself as closed. The buffer flags are updated to reflect the |
| 225 | * new state. If the stream interface has SI_FL_NOHALF, we also forward the |
| 226 | * close to the write side. If a control layer is defined, then it is supposed |
| 227 | * to be a socket layer and file descriptors are then shutdown or closed |
| 228 | * accordingly. If no control layer is defined, then the SI is supposed to be |
| 229 | * an embedded one and the owner task is woken up if it exists. The function |
| 230 | * does not disable polling on the FD by itself, it returns non-zero instead |
| 231 | * if the caller needs to do so (except when the FD is deleted where this is |
| 232 | * implicit). |
| 233 | */ |
| 234 | int stream_int_shutr(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 235 | { |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 236 | struct connection *conn = &si->conn; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 237 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 238 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 239 | if (si->ib->flags & CF_SHUTR) |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 240 | return 0; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 241 | si->ib->flags |= CF_SHUTR; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 242 | si->ib->rex = TICK_ETERNITY; |
| 243 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 244 | |
| 245 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
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 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 248 | if (si->ob->flags & CF_SHUTW) { |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 249 | conn_xprt_close(&si->conn); |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 250 | if (conn->ctrl) |
| 251 | fd_delete(si_fd(si)); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 252 | si->state = SI_ST_DIS; |
| 253 | si->exp = TICK_ETERNITY; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 254 | |
Willy Tarreau | d8ccffe | 2010-09-07 16:16:50 +0200 | [diff] [blame] | 255 | if (si->release) |
| 256 | si->release(si); |
| 257 | } |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 258 | else if (si->flags & SI_FL_NOHALF) { |
| 259 | /* we want to immediately forward this close to the write side */ |
| 260 | return stream_int_shutw(si); |
| 261 | } |
| 262 | else if (conn->ctrl) { |
| 263 | /* we want the caller to disable polling on this FD */ |
| 264 | return 1; |
| 265 | } |
Willy Tarreau | 0bd05ea | 2010-07-02 11:18:03 +0200 | [diff] [blame] | 266 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 267 | /* note that if the task exists, it must unregister itself once it runs */ |
| 268 | if (!conn->ctrl && !(si->flags & SI_FL_DONT_WAKE) && si->owner) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 269 | task_wakeup(si->owner, TASK_WOKEN_IO); |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 270 | return 0; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 271 | } |
| 272 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 273 | /* |
| 274 | * This function performs a shutdown-write on a stream interface in a connected or |
| 275 | * init state (it does nothing for other states). It either shuts the write side |
| 276 | * or marks itself as closed. The buffer flags are updated to reflect the new state. |
| 277 | * It does also close everything if the SI was marked as being in error state. If |
| 278 | * there is a data-layer shutdown, it is called. If a control layer is defined, then |
| 279 | * it is supposed to be a socket layer and file descriptors are then shutdown or |
| 280 | * closed accordingly. If no control layer is defined, then the SI is supposed to |
| 281 | * be an embedded one and the owner task is woken up if it exists. The function |
| 282 | * does not disable polling on the FD by itself, it returns non-zero instead if |
| 283 | * the caller needs to do so (except when the FD is deleted where this is implicit). |
| 284 | */ |
| 285 | int stream_int_shutw(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 286 | { |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 287 | struct connection *conn = &si->conn; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 288 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 289 | si->ob->flags &= ~CF_SHUTW_NOW; |
| 290 | if (si->ob->flags & CF_SHUTW) |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 291 | return 0; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 292 | si->ob->flags |= CF_SHUTW; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 293 | si->ob->wex = TICK_ETERNITY; |
| 294 | si->flags &= ~SI_FL_WAIT_DATA; |
| 295 | |
| 296 | switch (si->state) { |
| 297 | case SI_ST_EST: |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 298 | /* we have to shut before closing, otherwise some short messages |
| 299 | * may never leave the system, especially when there are remaining |
| 300 | * unread data in the socket input buffer, or when nolinger is set. |
| 301 | * However, if SI_FL_NOLINGER is explicitly set, we know there is |
| 302 | * no risk so we close both sides immediately. |
| 303 | */ |
| 304 | if (si->flags & SI_FL_ERR) { |
| 305 | /* quick close, the socket is already shut. Remove pending flags. */ |
| 306 | si->flags &= ~SI_FL_NOLINGER; |
| 307 | } else if (si->flags & SI_FL_NOLINGER) { |
| 308 | si->flags &= ~SI_FL_NOLINGER; |
| 309 | if (conn->ctrl) { |
| 310 | setsockopt(si_fd(si), SOL_SOCKET, SO_LINGER, |
| 311 | (struct linger *) &nolinger, sizeof(struct linger)); |
| 312 | } |
| 313 | /* unclean data-layer shutdown */ |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 314 | if (conn->xprt && conn->xprt->shutw) |
| 315 | conn->xprt->shutw(conn, 0); |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 316 | } else { |
| 317 | /* clean data-layer shutdown */ |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 318 | if (conn->xprt && conn->xprt->shutw) |
| 319 | conn->xprt->shutw(conn, 1); |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 320 | |
| 321 | if (!(si->flags & SI_FL_NOHALF)) { |
| 322 | /* We shutdown transport layer */ |
| 323 | if (conn->ctrl) |
| 324 | shutdown(si_fd(si), SHUT_WR); |
| 325 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 326 | if (!(si->ib->flags & (CF_SHUTR|CF_DONT_READ))) { |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 327 | /* OK just a shutw, but we want the caller |
| 328 | * to disable polling on this FD if exists. |
| 329 | */ |
| 330 | return !!conn->ctrl; |
| 331 | } |
| 332 | } |
| 333 | } |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 334 | |
| 335 | /* fall through */ |
| 336 | case SI_ST_CON: |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 337 | /* we may have to close a pending connection, and mark the |
| 338 | * response buffer as shutr |
| 339 | */ |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 340 | conn_xprt_close(&si->conn); |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 341 | if (conn->ctrl) |
| 342 | fd_delete(si_fd(si)); |
| 343 | /* fall through */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 344 | case SI_ST_CER: |
Willy Tarreau | 32d3ee9 | 2010-12-29 14:03:02 +0100 | [diff] [blame] | 345 | case SI_ST_QUE: |
| 346 | case SI_ST_TAR: |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 347 | si->state = SI_ST_DIS; |
Willy Tarreau | d8ccffe | 2010-09-07 16:16:50 +0200 | [diff] [blame] | 348 | |
| 349 | if (si->release) |
| 350 | si->release(si); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 351 | default: |
| 352 | si->flags &= ~SI_FL_WAIT_ROOM; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 353 | si->ib->flags |= CF_SHUTR; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 354 | si->ib->rex = TICK_ETERNITY; |
| 355 | si->exp = TICK_ETERNITY; |
| 356 | } |
| 357 | |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 358 | /* note that if the task exists, it must unregister itself once it runs */ |
| 359 | if (!conn->ctrl && !(si->flags & SI_FL_DONT_WAKE) && si->owner) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 360 | task_wakeup(si->owner, TASK_WOKEN_IO); |
Willy Tarreau | 4a36b56 | 2012-08-06 19:31:45 +0200 | [diff] [blame] | 361 | return 0; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 362 | } |
| 363 | |
| 364 | /* default chk_rcv function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 365 | static void stream_int_chk_rcv(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 366 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 367 | struct channel *ib = si->ib; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 368 | |
| 369 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 370 | __FUNCTION__, |
| 371 | si, si->state, si->ib->flags, si->ob->flags); |
| 372 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 373 | 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] | 374 | return; |
| 375 | |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 376 | if (channel_full(ib)) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 377 | /* stop reading */ |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 378 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 379 | } |
| 380 | else { |
| 381 | /* (re)start reading */ |
| 382 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 383 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 384 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | /* default chk_snd function for scheduled tasks */ |
Willy Tarreau | f873d75 | 2012-05-11 17:47:17 +0200 | [diff] [blame] | 389 | static void stream_int_chk_snd(struct stream_interface *si) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 390 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 391 | struct channel *ob = si->ob; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 392 | |
| 393 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 394 | __FUNCTION__, |
| 395 | si, si->state, si->ib->flags, si->ob->flags); |
| 396 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 397 | if (unlikely(si->state != SI_ST_EST || (si->ob->flags & CF_SHUTW))) |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 398 | return; |
| 399 | |
| 400 | if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 401 | channel_is_empty(ob)) /* called with nothing to send ! */ |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 402 | return; |
| 403 | |
| 404 | /* Otherwise there are remaining data to be sent in the buffer, |
| 405 | * so we tell the handler. |
| 406 | */ |
| 407 | si->flags &= ~SI_FL_WAIT_DATA; |
| 408 | if (!tick_isset(ob->wex)) |
| 409 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 410 | |
| 411 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 412 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 413 | } |
| 414 | |
Willy Tarreau | b24281b | 2011-02-13 13:16:36 +0100 | [diff] [blame] | 415 | /* 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] | 416 | * 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] | 417 | * 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] | 418 | * function before returning. It must be deleted by the task handler using |
Willy Tarreau | b24281b | 2011-02-13 13:16:36 +0100 | [diff] [blame] | 419 | * stream_int_unregister_handler(), possibly from within the function itself. |
Willy Tarreau | fa6bac6 | 2012-05-31 14:16:59 +0200 | [diff] [blame] | 420 | * It also pre-initializes applet.state to zero and the connection context |
| 421 | * to NULL. |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 422 | */ |
Willy Tarreau | b24281b | 2011-02-13 13:16:36 +0100 | [diff] [blame] | 423 | 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] | 424 | { |
Simon Horman | 7abd00d | 2011-08-13 08:03:51 +0900 | [diff] [blame] | 425 | 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] | 426 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 427 | si_prepare_embedded(si); |
Willy Tarreau | 3cefd52 | 2012-08-30 15:49:18 +0200 | [diff] [blame] | 428 | set_target_applet(&si->conn.target, app); |
Aman Gupta | 9a13e84 | 2012-04-02 18:57:53 -0700 | [diff] [blame] | 429 | si->release = app->release; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 430 | si->flags |= SI_FL_WAIT_DATA; |
| 431 | return si->owner; |
| 432 | } |
| 433 | |
| 434 | /* Register a function to handle a stream_interface as a standalone task. The |
| 435 | * new task itself is returned and is assigned as si->owner. The stream_interface |
| 436 | * pointer will be pointed to by the task's context. The handler can be detached |
| 437 | * by using stream_int_unregister_handler(). |
Willy Tarreau | 7c0a151 | 2011-03-10 11:17:02 +0100 | [diff] [blame] | 438 | * FIXME: the code should be updated to ensure that we don't change si->owner |
| 439 | * 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] | 440 | */ |
| 441 | struct task *stream_int_register_handler_task(struct stream_interface *si, |
| 442 | struct task *(*fct)(struct task *)) |
| 443 | { |
| 444 | struct task *t; |
| 445 | |
| 446 | DPRINTF(stderr, "registering handler %p for si %p (was %p)\n", fct, si, si->owner); |
| 447 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 448 | si_prepare_task(si); |
Willy Tarreau | 3cefd52 | 2012-08-30 15:49:18 +0200 | [diff] [blame] | 449 | clear_target(&si->conn.target); |
Willy Tarreau | 0bd05ea | 2010-07-02 11:18:03 +0200 | [diff] [blame] | 450 | si->release = NULL; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 451 | si->flags |= SI_FL_WAIT_DATA; |
| 452 | |
| 453 | t = task_new(); |
| 454 | si->owner = t; |
| 455 | if (!t) |
| 456 | return t; |
Willy Tarreau | 7c0a151 | 2011-03-10 11:17:02 +0100 | [diff] [blame] | 457 | |
Willy Tarreau | 3cefd52 | 2012-08-30 15:49:18 +0200 | [diff] [blame] | 458 | set_target_task(&si->conn.target, t); |
Willy Tarreau | 7c0a151 | 2011-03-10 11:17:02 +0100 | [diff] [blame] | 459 | |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 460 | t->process = fct; |
| 461 | t->context = si; |
| 462 | task_wakeup(si->owner, TASK_WOKEN_INIT); |
| 463 | |
| 464 | return t; |
| 465 | } |
| 466 | |
| 467 | /* Unregister a stream interface handler. This must be called by the handler task |
| 468 | * itself when it detects that it is in the SI_ST_DIS state. This function can |
| 469 | * both detach standalone handlers and embedded handlers. |
| 470 | */ |
| 471 | void stream_int_unregister_handler(struct stream_interface *si) |
| 472 | { |
Willy Tarreau | 3cefd52 | 2012-08-30 15:49:18 +0200 | [diff] [blame] | 473 | if (si->conn.target.type == TARG_TYPE_TASK) { |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 474 | /* external handler : kill the task */ |
Willy Tarreau | 3cefd52 | 2012-08-30 15:49:18 +0200 | [diff] [blame] | 475 | task_delete(si->conn.target.ptr.t); |
| 476 | task_free(si->conn.target.ptr.t); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 477 | } |
Willy Tarreau | 0bd05ea | 2010-07-02 11:18:03 +0200 | [diff] [blame] | 478 | si->release = NULL; |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 479 | si->owner = NULL; |
Willy Tarreau | 3cefd52 | 2012-08-30 15:49:18 +0200 | [diff] [blame] | 480 | clear_target(&si->conn.target); |
Willy Tarreau | fb90d94 | 2009-09-05 20:57:35 +0200 | [diff] [blame] | 481 | } |
| 482 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 483 | /* 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] | 484 | * established. It returns 0 if it fails in a fatal way or needs to poll to go |
| 485 | * 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] | 486 | * flags (the bit is provided in <flag> by the caller). It is designed to be |
| 487 | * 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] | 488 | */ |
| 489 | int conn_si_send_proxy(struct connection *conn, unsigned int flag) |
| 490 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 491 | struct stream_interface *si = conn->owner; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 492 | |
| 493 | /* we might have been called just after an asynchronous shutw */ |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 494 | if (conn->flags & CO_FL_SOCK_WR_SH) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 495 | goto out_error; |
| 496 | |
| 497 | /* If we have a PROXY line to send, we'll use this to validate the |
| 498 | * connection, in which case the connection is validated only once |
| 499 | * we've sent the whole proxy line. Otherwise we use connect(). |
| 500 | */ |
| 501 | if (si->send_proxy_ofs) { |
| 502 | int ret; |
| 503 | |
| 504 | /* The target server expects a PROXY line to be sent first. |
| 505 | * If the send_proxy_ofs is negative, it corresponds to the |
| 506 | * offset to start sending from then end of the proxy string |
| 507 | * (which is recomputed every time since it's constant). If |
| 508 | * it is positive, it means we have to send from the start. |
| 509 | */ |
Willy Tarreau | 986a9d2 | 2012-08-30 21:11:38 +0200 | [diff] [blame] | 510 | 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] | 511 | if (!ret) |
| 512 | goto out_error; |
| 513 | |
| 514 | if (si->send_proxy_ofs > 0) |
| 515 | si->send_proxy_ofs = -ret; /* first call */ |
| 516 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 517 | /* we have to send trash from (ret+sp for -sp bytes). If the |
| 518 | * data layer has a pending write, we'll also set MSG_MORE. |
| 519 | */ |
| 520 | ret = send(conn->t.sock.fd, trash + ret + si->send_proxy_ofs, -si->send_proxy_ofs, |
| 521 | (conn->flags & CO_FL_DATA_WR_ENA) ? MSG_MORE : 0); |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 522 | |
| 523 | if (ret == 0) |
| 524 | goto out_wait; |
| 525 | |
| 526 | if (ret < 0) { |
| 527 | if (errno == EAGAIN) |
| 528 | goto out_wait; |
| 529 | goto out_error; |
| 530 | } |
| 531 | |
| 532 | si->send_proxy_ofs += ret; /* becomes zero once complete */ |
| 533 | if (si->send_proxy_ofs != 0) |
| 534 | goto out_wait; |
| 535 | |
| 536 | /* OK we've sent the whole line, we're connected */ |
| 537 | } |
| 538 | |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 539 | /* The connection is ready now, simply return and let the connection |
| 540 | * handler notify upper layers if needed. |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 541 | */ |
| 542 | if (conn->flags & CO_FL_WAIT_L4_CONN) |
| 543 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 544 | conn->flags &= ~flag; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 545 | return 1; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 546 | |
| 547 | out_error: |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 548 | /* Write error on the file descriptor */ |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 549 | conn->flags |= CO_FL_ERROR; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 550 | conn->flags &= ~flag; |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 551 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 552 | |
| 553 | out_wait: |
Willy Tarreau | a1a7474 | 2012-08-24 12:14:49 +0200 | [diff] [blame] | 554 | __conn_sock_stop_recv(conn); |
| 555 | __conn_sock_poll_send(conn); |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 556 | return 0; |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 557 | } |
| 558 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 559 | /* 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] | 560 | * 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] | 561 | * 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] | 562 | * an important event requires special handling. It relies on the connection handler |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 563 | * to commit any polling updates. The function always returns 0. |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 564 | */ |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 565 | static int si_conn_wake_cb(struct connection *conn) |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 566 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 567 | struct stream_interface *si = conn->owner; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 568 | |
| 569 | DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n", |
| 570 | __FUNCTION__, |
| 571 | si, si->state, si->ib->flags, si->ob->flags); |
| 572 | |
Willy Tarreau | 3c55ec2 | 2012-07-23 19:19:51 +0200 | [diff] [blame] | 573 | if (conn->flags & CO_FL_ERROR) |
| 574 | si->flags |= SI_FL_ERR; |
| 575 | |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 576 | /* check for recent connection establishment */ |
Willy Tarreau | c76ae33 | 2012-07-12 15:32:13 +0200 | [diff] [blame] | 577 | 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] | 578 | si->exp = TICK_ETERNITY; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 579 | si->ob->flags |= CF_WRITE_NULL; |
Willy Tarreau | 8f8c92f | 2012-07-23 19:45:44 +0200 | [diff] [blame] | 580 | } |
| 581 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 582 | /* process consumer side */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 583 | if (channel_is_empty(si->ob)) { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 584 | 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] | 585 | (si->state == SI_ST_EST)) |
| 586 | stream_int_shutw(si); |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 587 | __conn_data_stop_send(conn); |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 588 | si->ob->wex = TICK_ETERNITY; |
| 589 | } |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 590 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 591 | 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] | 592 | si->flags |= SI_FL_WAIT_DATA; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 593 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 594 | if (si->ob->flags & CF_WRITE_ACTIVITY) { |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 595 | /* update timeouts if we have written something */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 596 | if ((si->ob->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 597 | !channel_is_empty(si->ob)) |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 598 | if (tick_isset(si->ob->wex)) |
| 599 | si->ob->wex = tick_add_ifset(now_ms, si->ob->wto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 600 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 601 | if (!(si->flags & SI_FL_INDEP_STR)) |
| 602 | if (tick_isset(si->ib->rex)) |
| 603 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 604 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 605 | 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] | 606 | !channel_full(si->ob) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 607 | (si->ob->prod->flags & SI_FL_WAIT_ROOM))) |
| 608 | si_chk_rcv(si->ob->prod); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 609 | } |
| 610 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 611 | /* process producer side. |
| 612 | * We might have some data the consumer is waiting for. |
| 613 | * We can do fast-forwarding, but we avoid doing this for partial |
| 614 | * buffers, because it is very likely that it will be done again |
| 615 | * immediately afterwards once the following data is parsed (eg: |
| 616 | * HTTP chunking). |
| 617 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 618 | if (((si->ib->flags & CF_READ_PARTIAL) && !channel_is_empty(si->ib)) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 619 | (si->ib->pipe /* always try to send spliced data */ || |
| 620 | (si->ib->buf.i == 0 && (si->ib->cons->flags & SI_FL_WAIT_DATA)))) { |
| 621 | int last_len = si->ib->pipe ? si->ib->pipe->data : 0; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 622 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 623 | si_chk_snd(si->ib->cons); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 624 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 625 | /* check if the consumer has freed some space either in the |
| 626 | * buffer or in the pipe. |
| 627 | */ |
Willy Tarreau | 3bf1b2b | 2012-08-27 20:46:07 +0200 | [diff] [blame] | 628 | if (!channel_full(si->ib) && |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 629 | (!last_len || !si->ib->pipe || si->ib->pipe->data < last_len)) |
| 630 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 631 | } |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 632 | |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 633 | if (si->flags & SI_FL_WAIT_ROOM) { |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 634 | __conn_data_stop_recv(conn); |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 635 | si->ib->rex = TICK_ETERNITY; |
| 636 | } |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 637 | 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] | 638 | !channel_full(si->ib)) { |
Willy Tarreau | 44b5dc6 | 2012-08-24 12:12:53 +0200 | [diff] [blame] | 639 | if (tick_isset(si->ib->rex)) |
| 640 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 641 | } |
| 642 | |
| 643 | /* wake the task up only when needed */ |
| 644 | if (/* changes on the production side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 645 | (si->ib->flags & (CF_READ_NULL|CF_READ_ERROR)) || |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 646 | si->state != SI_ST_EST || |
| 647 | (si->flags & SI_FL_ERR) || |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 648 | ((si->ib->flags & CF_READ_PARTIAL) && |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 649 | (!si->ib->to_forward || si->ib->cons->state != SI_ST_EST)) || |
| 650 | |
| 651 | /* changes on the consumption side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 652 | (si->ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) || |
| 653 | ((si->ob->flags & CF_WRITE_ACTIVITY) && |
| 654 | ((si->ob->flags & CF_SHUTW) || |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 655 | si->ob->prod->state != SI_ST_EST || |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 656 | (channel_is_empty(si->ob) && !si->ob->to_forward)))) { |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 657 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 658 | } |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 659 | if (si->ib->flags & CF_READ_ACTIVITY) |
| 660 | si->ib->flags &= ~CF_READ_DONTWAIT; |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 661 | return 0; |
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 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 723 | b->flags |= CF_WRITE_PARTIAL; |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 724 | |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 725 | if (!b->buf.o) { |
| 726 | /* 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] | 727 | b->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT); |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 728 | break; |
| 729 | } |
| 730 | |
| 731 | if (--write_poll <= 0) |
| 732 | break; |
| 733 | } /* while */ |
| 734 | |
| 735 | if (conn->flags & CO_FL_ERROR) |
| 736 | return -1; |
| 737 | |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 738 | return 0; |
| 739 | } |
| 740 | |
| 741 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 742 | /* Updates the timers and flags of a stream interface attached to a connection, |
| 743 | * depending on the buffers' flags. It should only be called once after the |
| 744 | * buffer flags have settled down, and before they are cleared. It doesn't |
| 745 | * harm to call it as often as desired (it just slightly hurts performance). |
| 746 | * It is only meant to be called by upper layers after buffer flags have been |
| 747 | * manipulated by analysers. |
| 748 | */ |
| 749 | void stream_int_update_conn(struct stream_interface *si) |
| 750 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 751 | struct channel *ib = si->ib; |
| 752 | struct channel *ob = si->ob; |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 753 | |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 754 | /* Check if we need to close the read side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 755 | if (!(ib->flags & CF_SHUTR)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 756 | /* Read not closed, update FD status and timeout for reads */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 757 | if ((ib->flags & (CF_HIJACK|CF_DONT_READ)) || channel_full(ib)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 758 | /* stop reading */ |
| 759 | if (!(si->flags & SI_FL_WAIT_ROOM)) { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 760 | if (!(ib->flags & (CF_HIJACK|CF_DONT_READ))) /* full */ |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 761 | si->flags |= SI_FL_WAIT_ROOM; |
| 762 | conn_data_stop_recv(&si->conn); |
| 763 | ib->rex = TICK_ETERNITY; |
| 764 | } |
| 765 | } |
| 766 | else { |
| 767 | /* (re)start reading and update timeout. Note: we don't recompute the timeout |
| 768 | * everytime we get here, otherwise it would risk never to expire. We only |
| 769 | * update it if is was not yet set. The stream socket handler will already |
| 770 | * have updated it if there has been a completed I/O. |
| 771 | */ |
| 772 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 773 | conn_data_want_recv(&si->conn); |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 774 | 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] | 775 | ib->rex = tick_add_ifset(now_ms, ib->rto); |
| 776 | } |
| 777 | } |
| 778 | |
| 779 | /* Check if we need to close the write side */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 780 | if (!(ob->flags & CF_SHUTW)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 781 | /* Write not closed, update FD status and timeout for writes */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 782 | if (channel_is_empty(ob)) { |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 783 | /* stop writing */ |
| 784 | if (!(si->flags & SI_FL_WAIT_DATA)) { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 785 | if ((ob->flags & (CF_HIJACK|CF_SHUTW_NOW)) == 0) |
Willy Tarreau | 100c467 | 2012-08-20 12:06:26 +0200 | [diff] [blame] | 786 | si->flags |= SI_FL_WAIT_DATA; |
| 787 | conn_data_stop_send(&si->conn); |
| 788 | ob->wex = TICK_ETERNITY; |
| 789 | } |
| 790 | } |
| 791 | else { |
| 792 | /* (re)start writing and update timeout. Note: we don't recompute the timeout |
| 793 | * everytime we get here, otherwise it would risk never to expire. We only |
| 794 | * update it if is was not yet set. The stream socket handler will already |
| 795 | * have updated it if there has been a completed I/O. |
| 796 | */ |
| 797 | si->flags &= ~SI_FL_WAIT_DATA; |
| 798 | conn_data_want_send(&si->conn); |
| 799 | if (!tick_isset(ob->wex)) { |
| 800 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 801 | if (tick_isset(ib->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
| 802 | /* Note: depending on the protocol, we don't know if we're waiting |
| 803 | * for incoming data or not. So in order to prevent the socket from |
| 804 | * expiring read timeouts during writes, we refresh the read timeout, |
| 805 | * except if it was already infinite or if we have explicitly setup |
| 806 | * independent streams. |
| 807 | */ |
| 808 | ib->rex = tick_add_ifset(now_ms, ib->rto); |
| 809 | } |
| 810 | } |
| 811 | } |
| 812 | } |
| 813 | } |
| 814 | |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 815 | /* This function is used for inter-stream-interface calls. It is called by the |
| 816 | * consumer to inform the producer side that it may be interested in checking |
| 817 | * for free space in the buffer. Note that it intentionally does not update |
| 818 | * timeouts, so that we can still check them later at wake-up. This function is |
| 819 | * dedicated to connection-based stream interfaces. |
| 820 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 821 | static void stream_int_chk_rcv_conn(struct stream_interface *si) |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 822 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 823 | struct channel *ib = si->ib; |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 824 | |
Willy Tarreau | 34ffd77 | 2012-09-03 16:51:27 +0200 | [diff] [blame] | 825 | if (unlikely(si->state > SI_ST_EST || (ib->flags & CF_SHUTR))) |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 826 | return; |
| 827 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 828 | if ((ib->flags & (CF_HIJACK|CF_DONT_READ)) || channel_full(ib)) { |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 829 | /* stop reading */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 830 | if (!(ib->flags & (CF_HIJACK|CF_DONT_READ))) /* full */ |
Willy Tarreau | 46a8d92 | 2012-08-20 12:38:36 +0200 | [diff] [blame] | 831 | si->flags |= SI_FL_WAIT_ROOM; |
| 832 | conn_data_stop_recv(&si->conn); |
| 833 | } |
| 834 | else { |
| 835 | /* (re)start reading */ |
| 836 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 837 | conn_data_want_recv(&si->conn); |
| 838 | } |
| 839 | } |
| 840 | |
| 841 | |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 842 | /* This function is used for inter-stream-interface calls. It is called by the |
| 843 | * producer to inform the consumer side that it may be interested in checking |
| 844 | * for data in the buffer. Note that it intentionally does not update timeouts, |
| 845 | * so that we can still check them later at wake-up. |
| 846 | */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 847 | static void stream_int_chk_snd_conn(struct stream_interface *si) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 848 | { |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 849 | struct channel *ob = si->ob; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 850 | |
Willy Tarreau | 34ffd77 | 2012-09-03 16:51:27 +0200 | [diff] [blame] | 851 | if (unlikely(si->state > SI_ST_EST || (ob->flags & CF_SHUTW))) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 852 | return; |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 853 | |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 854 | if (unlikely(channel_is_empty(ob))) /* called with nothing to send ! */ |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 855 | return; |
| 856 | |
| 857 | if (!ob->pipe && /* spliced data wants to be forwarded ASAP */ |
| 858 | (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */ |
| 859 | (fdtab[si_fd(si)].ev & FD_POLL_OUT))) /* we'll be called anyway */ |
| 860 | return; |
| 861 | |
Willy Tarreau | 34ffd77 | 2012-09-03 16:51:27 +0200 | [diff] [blame] | 862 | 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] | 863 | /* Write error on the file descriptor. We mark the FD as STERROR so |
| 864 | * that we don't use it anymore and we notify the task. |
| 865 | */ |
| 866 | fdtab[si_fd(si)].ev &= ~FD_POLL_STICKY; |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 867 | __conn_data_stop_both(&si->conn); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 868 | si->flags |= SI_FL_ERR; |
| 869 | si->conn.flags |= CO_FL_ERROR; |
| 870 | goto out_wakeup; |
| 871 | } |
| 872 | |
| 873 | /* OK, so now we know that some data might have been sent, and that we may |
| 874 | * have to poll first. We have to do that too if the buffer is not empty. |
| 875 | */ |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 876 | if (channel_is_empty(ob)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 877 | /* the connection is established but we can't write. Either the |
| 878 | * buffer is empty, or we just refrain from sending because the |
| 879 | * ->o limit was reached. Maybe we just wrote the last |
| 880 | * chunk and need to close. |
| 881 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 882 | if (((ob->flags & (CF_SHUTW|CF_HIJACK|CF_AUTO_CLOSE|CF_SHUTW_NOW)) == |
| 883 | (CF_AUTO_CLOSE|CF_SHUTW_NOW)) && |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 884 | (si->state == SI_ST_EST)) { |
| 885 | si_shutw(si); |
| 886 | goto out_wakeup; |
| 887 | } |
| 888 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 889 | if ((ob->flags & (CF_SHUTW|CF_SHUTW_NOW|CF_HIJACK)) == 0) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 890 | si->flags |= SI_FL_WAIT_DATA; |
| 891 | ob->wex = TICK_ETERNITY; |
| 892 | } |
| 893 | else { |
| 894 | /* Otherwise there are remaining data to be sent in the buffer, |
| 895 | * which means we have to poll before doing so. |
| 896 | */ |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 897 | __conn_data_want_send(&si->conn); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 898 | si->flags &= ~SI_FL_WAIT_DATA; |
| 899 | if (!tick_isset(ob->wex)) |
| 900 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 901 | } |
| 902 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 903 | if (likely(ob->flags & CF_WRITE_ACTIVITY)) { |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 904 | /* update timeout if we have written something */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 905 | if ((ob->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL && |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 906 | !channel_is_empty(ob)) |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 907 | ob->wex = tick_add_ifset(now_ms, ob->wto); |
| 908 | |
| 909 | if (tick_isset(si->ib->rex) && !(si->flags & SI_FL_INDEP_STR)) { |
| 910 | /* Note: to prevent the client from expiring read timeouts |
| 911 | * during writes, we refresh it. We only do this if the |
| 912 | * interface is not configured for "independent streams", |
| 913 | * because for some applications it's better not to do this, |
| 914 | * for instance when continuously exchanging small amounts |
| 915 | * of data which can full the socket buffers long before a |
| 916 | * write timeout is detected. |
| 917 | */ |
| 918 | si->ib->rex = tick_add_ifset(now_ms, si->ib->rto); |
| 919 | } |
| 920 | } |
| 921 | |
| 922 | /* in case of special condition (error, shutdown, end of write...), we |
| 923 | * have to notify the task. |
| 924 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 925 | if (likely((ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) || |
Willy Tarreau | 8e21bb9 | 2012-08-24 22:40:29 +0200 | [diff] [blame] | 926 | (channel_is_empty(ob) && !ob->to_forward) || |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 927 | si->state != SI_ST_EST)) { |
| 928 | out_wakeup: |
| 929 | if (!(si->flags & SI_FL_DONT_WAKE) && si->owner) |
| 930 | task_wakeup(si->owner, TASK_WOKEN_IO); |
| 931 | } |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 932 | |
| 933 | /* commit possible polling changes */ |
| 934 | conn_cond_update_polling(&si->conn); |
Willy Tarreau | de5722c | 2012-08-20 15:01:10 +0200 | [diff] [blame] | 935 | } |
| 936 | |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 937 | /* |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 938 | * 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] | 939 | * into the buffer from the connection. It iterates over the transport layer's |
| 940 | * rcv_buf function. |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 941 | */ |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 942 | static void si_conn_recv_cb(struct connection *conn) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 943 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 944 | struct stream_interface *si = conn->owner; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 945 | struct channel *b = si->ib; |
| 946 | int ret, max, cur_read; |
| 947 | int read_poll = MAX_READ_POLL_LOOPS; |
| 948 | |
| 949 | /* stop immediately on errors. Note that we DON'T want to stop on |
| 950 | * POLL_ERR, as the poller might report a write error while there |
| 951 | * are still data available in the recv buffer. This typically |
| 952 | * happens when we send too large a request to a backend server |
| 953 | * which rejects it before reading it all. |
| 954 | */ |
| 955 | if (conn->flags & CO_FL_ERROR) |
| 956 | goto out_error; |
| 957 | |
| 958 | /* stop here if we reached the end of data */ |
| 959 | if (conn_data_read0_pending(conn)) |
| 960 | goto out_shutdown_r; |
| 961 | |
| 962 | /* maybe we were called immediately after an asynchronous shutr */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 963 | if (b->flags & CF_SHUTR) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 964 | return; |
| 965 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 966 | cur_read = 0; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 967 | |
| 968 | /* First, let's see if we may splice data across the channel without |
| 969 | * using a buffer. |
| 970 | */ |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 971 | if (conn->xprt->rcv_pipe && |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 972 | b->to_forward >= MIN_SPLICE_FORWARD && b->flags & CF_KERN_SPLICING) { |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 973 | if (buffer_not_empty(&b->buf)) { |
| 974 | /* We're embarrassed, there are already data pending in |
| 975 | * the buffer and we don't want to have them at two |
| 976 | * locations at a time. Let's indicate we need some |
| 977 | * place and ask the consumer to hurry. |
| 978 | */ |
| 979 | goto abort_splice; |
| 980 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 981 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 982 | if (unlikely(b->pipe == NULL)) { |
| 983 | if (pipes_used >= global.maxpipes || !(b->pipe = get_pipe())) { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 984 | b->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 985 | goto abort_splice; |
| 986 | } |
| 987 | } |
| 988 | |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 989 | ret = conn->xprt->rcv_pipe(conn, b->pipe, b->to_forward); |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 990 | if (ret < 0) { |
| 991 | /* splice not supported on this end, let's disable it */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 992 | b->flags &= ~CF_KERN_SPLICING; |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 993 | goto abort_splice; |
| 994 | } |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 995 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 996 | if (ret > 0) { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 997 | if (b->to_forward != CHN_INFINITE_FORWARD) |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 998 | b->to_forward -= ret; |
| 999 | b->total += ret; |
| 1000 | cur_read += ret; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1001 | b->flags |= CF_READ_PARTIAL; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1002 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1003 | |
| 1004 | if (conn_data_read0_pending(conn)) |
| 1005 | goto out_shutdown_r; |
| 1006 | |
| 1007 | if (conn->flags & CO_FL_ERROR) |
| 1008 | goto out_error; |
| 1009 | |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1010 | if (conn->flags & CO_FL_WAIT_ROOM) /* most likely the pipe is full */ |
| 1011 | si->flags |= SI_FL_WAIT_ROOM; |
| 1012 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1013 | /* splice not possible (anymore), let's go on on standard copy */ |
| 1014 | } |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1015 | |
| 1016 | abort_splice: |
| 1017 | /* release the pipe if we can, which is almost always the case */ |
| 1018 | if (b->pipe && !b->pipe->data) { |
| 1019 | put_pipe(b->pipe); |
| 1020 | b->pipe = NULL; |
| 1021 | } |
| 1022 | |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1023 | 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] | 1024 | max = bi_avail(b); |
| 1025 | |
| 1026 | if (!max) { |
Willy Tarreau | 56a77e5 | 2012-09-02 18:34:44 +0200 | [diff] [blame] | 1027 | si->flags |= SI_FL_WAIT_ROOM; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1028 | break; |
| 1029 | } |
| 1030 | |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 1031 | ret = conn->xprt->rcv_buf(conn, &b->buf, max); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1032 | if (ret <= 0) |
| 1033 | break; |
| 1034 | |
| 1035 | cur_read += ret; |
| 1036 | |
| 1037 | /* if we're allowed to directly forward data, we must update ->o */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1038 | if (b->to_forward && !(b->flags & (CF_SHUTW|CF_SHUTW_NOW))) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1039 | unsigned long fwd = ret; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1040 | if (b->to_forward != CHN_INFINITE_FORWARD) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1041 | if (fwd > b->to_forward) |
| 1042 | fwd = b->to_forward; |
| 1043 | b->to_forward -= fwd; |
| 1044 | } |
Willy Tarreau | a75bcef | 2012-08-24 22:56:11 +0200 | [diff] [blame] | 1045 | b_adv(&b->buf, fwd); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1046 | } |
| 1047 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1048 | b->flags |= CF_READ_PARTIAL; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1049 | b->total += ret; |
| 1050 | |
Willy Tarreau | ad1cc3d | 2012-08-27 18:54:20 +0200 | [diff] [blame] | 1051 | if (channel_full(b)) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1052 | /* The buffer is now full, there's no point in going through |
| 1053 | * the loop again. |
| 1054 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1055 | if (!(b->flags & CF_STREAMER_FAST) && (cur_read == buffer_len(&b->buf))) { |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1056 | b->xfer_small = 0; |
| 1057 | b->xfer_large++; |
| 1058 | if (b->xfer_large >= 3) { |
| 1059 | /* we call this buffer a fast streamer if it manages |
| 1060 | * to be filled in one call 3 consecutive times. |
| 1061 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1062 | b->flags |= (CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1063 | //fputc('+', stderr); |
| 1064 | } |
| 1065 | } |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1066 | else if ((b->flags & (CF_STREAMER | CF_STREAMER_FAST)) && |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1067 | (cur_read <= b->buf.size / 2)) { |
| 1068 | b->xfer_large = 0; |
| 1069 | b->xfer_small++; |
| 1070 | if (b->xfer_small >= 2) { |
| 1071 | /* if the buffer has been at least half full twice, |
| 1072 | * we receive faster than we send, so at least it |
| 1073 | * is not a "fast streamer". |
| 1074 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1075 | b->flags &= ~CF_STREAMER_FAST; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1076 | //fputc('-', stderr); |
| 1077 | } |
| 1078 | } |
| 1079 | else { |
| 1080 | b->xfer_small = 0; |
| 1081 | b->xfer_large = 0; |
| 1082 | } |
| 1083 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1084 | si->flags |= SI_FL_WAIT_ROOM; |
| 1085 | break; |
| 1086 | } |
| 1087 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1088 | if ((b->flags & CF_READ_DONTWAIT) || --read_poll <= 0) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1089 | break; |
| 1090 | |
| 1091 | /* if too many bytes were missing from last read, it means that |
| 1092 | * it's pointless trying to read again because the system does |
| 1093 | * not have them in buffers. |
| 1094 | */ |
| 1095 | if (ret < max) { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1096 | if ((b->flags & (CF_STREAMER | CF_STREAMER_FAST)) && |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1097 | (cur_read <= b->buf.size / 2)) { |
| 1098 | b->xfer_large = 0; |
| 1099 | b->xfer_small++; |
| 1100 | if (b->xfer_small >= 3) { |
| 1101 | /* we have read less than half of the buffer in |
| 1102 | * one pass, and this happened at least 3 times. |
| 1103 | * This is definitely not a streamer. |
| 1104 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1105 | b->flags &= ~(CF_STREAMER | CF_STREAMER_FAST); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1106 | //fputc('!', stderr); |
| 1107 | } |
| 1108 | } |
| 1109 | |
| 1110 | /* if a streamer has read few data, it may be because we |
| 1111 | * have exhausted system buffers. It's not worth trying |
| 1112 | * again. |
| 1113 | */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1114 | if (b->flags & CF_STREAMER) |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1115 | break; |
| 1116 | |
| 1117 | /* if we read a large block smaller than what we requested, |
| 1118 | * it's almost certain we'll never get anything more. |
| 1119 | */ |
| 1120 | if (ret >= global.tune.recv_enough) |
| 1121 | break; |
| 1122 | } |
| 1123 | } /* while !flags */ |
| 1124 | |
Willy Tarreau | 96199b1 | 2012-08-24 00:46:52 +0200 | [diff] [blame] | 1125 | if (conn->flags & CO_FL_ERROR) |
| 1126 | goto out_error; |
| 1127 | |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1128 | if (conn_data_read0_pending(conn)) |
| 1129 | /* connection closed */ |
| 1130 | goto out_shutdown_r; |
| 1131 | |
| 1132 | return; |
| 1133 | |
| 1134 | out_shutdown_r: |
| 1135 | /* we received a shutdown */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1136 | b->flags |= CF_READ_NULL; |
| 1137 | if (b->flags & CF_AUTO_CLOSE) |
Willy Tarreau | 8263d2b | 2012-08-28 00:06:31 +0200 | [diff] [blame] | 1138 | channel_shutw_now(b); |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1139 | stream_sock_read0(si); |
| 1140 | conn_data_read0(conn); |
| 1141 | return; |
| 1142 | |
| 1143 | out_error: |
| 1144 | /* Read error on the connection, report the error and stop I/O */ |
| 1145 | conn->flags |= CO_FL_ERROR; |
Willy Tarreau | ce323de | 2012-08-20 21:41:06 +0200 | [diff] [blame] | 1146 | } |
| 1147 | |
| 1148 | /* |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1149 | * 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] | 1150 | * from the buffer to the connection. It iterates over the transport layer's |
| 1151 | * snd_buf function. |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1152 | */ |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 1153 | static void si_conn_send_cb(struct connection *conn) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1154 | { |
Willy Tarreau | e603e69 | 2012-09-27 22:20:41 +0200 | [diff] [blame] | 1155 | struct stream_interface *si = conn->owner; |
Willy Tarreau | 7421efb | 2012-07-02 15:11:27 +0200 | [diff] [blame] | 1156 | struct channel *b = si->ob; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1157 | |
| 1158 | if (conn->flags & CO_FL_ERROR) |
| 1159 | goto out_error; |
| 1160 | |
| 1161 | if (si->conn.flags & CO_FL_HANDSHAKE) |
| 1162 | /* a handshake was requested */ |
| 1163 | return; |
| 1164 | |
| 1165 | /* we might have been called just after an asynchronous shutw */ |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1166 | if (b->flags & CF_SHUTW) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1167 | return; |
| 1168 | |
| 1169 | /* OK there are data waiting to be sent */ |
Willy Tarreau | 5368d80 | 2012-08-21 18:22:06 +0200 | [diff] [blame] | 1170 | if (si_conn_send_loop(conn) < 0) |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1171 | goto out_error; |
| 1172 | |
| 1173 | /* OK all done */ |
| 1174 | return; |
| 1175 | |
| 1176 | out_error: |
| 1177 | /* Write error on the connection, report the error and stop I/O */ |
| 1178 | conn->flags |= CO_FL_ERROR; |
Willy Tarreau | eecf6ca | 2012-08-20 15:09:53 +0200 | [diff] [blame] | 1179 | } |
| 1180 | |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1181 | /* |
| 1182 | * This function propagates a null read received on a socket-based connection. |
| 1183 | * It updates the stream interface. If the stream interface has SI_FL_NOHALF, |
| 1184 | * the close is also forwarded to the write side as an abort. This function is |
| 1185 | * still socket-specific as it handles a setsockopt() call to set the SO_LINGER |
| 1186 | * state on the socket. |
| 1187 | */ |
| 1188 | void stream_sock_read0(struct stream_interface *si) |
| 1189 | { |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1190 | si->ib->flags &= ~CF_SHUTR_NOW; |
| 1191 | if (si->ib->flags & CF_SHUTR) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1192 | return; |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1193 | si->ib->flags |= CF_SHUTR; |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1194 | si->ib->rex = TICK_ETERNITY; |
| 1195 | si->flags &= ~SI_FL_WAIT_ROOM; |
| 1196 | |
| 1197 | if (si->state != SI_ST_EST && si->state != SI_ST_CON) |
| 1198 | return; |
| 1199 | |
Willy Tarreau | 03cdb7c | 2012-08-27 23:14:58 +0200 | [diff] [blame] | 1200 | if (si->ob->flags & CF_SHUTW) |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1201 | goto do_close; |
| 1202 | |
| 1203 | if (si->flags & SI_FL_NOHALF) { |
| 1204 | /* we want to immediately forward this close to the write side */ |
| 1205 | if (si->flags & SI_FL_NOLINGER) { |
| 1206 | si->flags &= ~SI_FL_NOLINGER; |
| 1207 | setsockopt(si_fd(si), SOL_SOCKET, SO_LINGER, |
| 1208 | (struct linger *) &nolinger, sizeof(struct linger)); |
| 1209 | } |
| 1210 | /* force flag on ssl to keep session in cache */ |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 1211 | if (si->conn.xprt->shutw) |
| 1212 | si->conn.xprt->shutw(&si->conn, 0); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1213 | goto do_close; |
| 1214 | } |
| 1215 | |
| 1216 | /* otherwise that's just a normal read shutdown */ |
Willy Tarreau | f16723e | 2012-08-24 12:52:22 +0200 | [diff] [blame] | 1217 | __conn_data_stop_recv(&si->conn); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1218 | return; |
| 1219 | |
| 1220 | do_close: |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 1221 | conn_xprt_close(&si->conn); |
Willy Tarreau | 9bf9c14 | 2012-08-20 15:38:41 +0200 | [diff] [blame] | 1222 | fd_delete(si_fd(si)); |
| 1223 | si->state = SI_ST_DIS; |
| 1224 | si->exp = TICK_ETERNITY; |
| 1225 | if (si->release) |
| 1226 | si->release(si); |
| 1227 | return; |
| 1228 | } |
| 1229 | |
Willy Tarreau | dded32d | 2008-11-30 19:48:07 +0100 | [diff] [blame] | 1230 | /* |
Willy Tarreau | cff6411 | 2008-11-03 06:26:53 +0100 | [diff] [blame] | 1231 | * Local variables: |
| 1232 | * c-indent-level: 8 |
| 1233 | * c-basic-offset: 8 |
| 1234 | * End: |
| 1235 | */ |