Willy Tarreau | dd81598 | 2007-10-16 12:25:14 +0200 | [diff] [blame] | 1 | /* |
Willy Tarreau | d1d5454 | 2012-09-12 22:58:11 +0200 | [diff] [blame] | 2 | * Listener management functions. |
Willy Tarreau | dd81598 | 2007-10-16 12:25:14 +0200 | [diff] [blame] | 3 | * |
Willy Tarreau | 0ccb744 | 2013-01-07 22:54:17 +0100 | [diff] [blame] | 4 | * Copyright 2000-2013 Willy Tarreau <w@1wt.eu> |
Willy Tarreau | dd81598 | 2007-10-16 12:25:14 +0200 | [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 | |
Willy Tarreau | 4448925 | 2014-01-14 17:52:01 +0100 | [diff] [blame] | 13 | #define _GNU_SOURCE |
Willy Tarreau | 6ae1ba6 | 2014-05-07 19:01:58 +0200 | [diff] [blame] | 14 | #include <ctype.h> |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 15 | #include <errno.h> |
Willy Tarreau | dd81598 | 2007-10-16 12:25:14 +0200 | [diff] [blame] | 16 | #include <stdio.h> |
| 17 | #include <string.h> |
Willy Tarreau | 95ccdde | 2014-02-01 09:28:36 +0100 | [diff] [blame] | 18 | #include <unistd.h> |
| 19 | #include <fcntl.h> |
Willy Tarreau | dd81598 | 2007-10-16 12:25:14 +0200 | [diff] [blame] | 20 | |
Willy Tarreau | dcc048a | 2020-06-04 19:11:43 +0200 | [diff] [blame] | 21 | #include <haproxy/acl.h> |
Willy Tarreau | 4c7e4b7 | 2020-05-27 12:58:42 +0200 | [diff] [blame] | 22 | #include <haproxy/api.h> |
Willy Tarreau | 6be7849 | 2020-06-05 00:00:29 +0200 | [diff] [blame] | 23 | #include <haproxy/cfgparse.h> |
Willy Tarreau | 7ea393d | 2020-06-04 18:02:10 +0200 | [diff] [blame] | 24 | #include <haproxy/connection.h> |
Willy Tarreau | 8d36697 | 2020-05-27 16:10:29 +0200 | [diff] [blame] | 25 | #include <haproxy/errors.h> |
Willy Tarreau | b255105 | 2020-06-09 09:07:15 +0200 | [diff] [blame] | 26 | #include <haproxy/fd.h> |
| 27 | #include <haproxy/freq_ctr.h> |
Willy Tarreau | f268ee8 | 2020-06-04 17:05:57 +0200 | [diff] [blame] | 28 | #include <haproxy/global.h> |
Willy Tarreau | 853b297 | 2020-05-27 18:01:47 +0200 | [diff] [blame] | 29 | #include <haproxy/list.h> |
Willy Tarreau | 213e990 | 2020-06-04 14:58:24 +0200 | [diff] [blame] | 30 | #include <haproxy/listener.h> |
Willy Tarreau | aeed4a8 | 2020-06-04 22:01:04 +0200 | [diff] [blame] | 31 | #include <haproxy/log.h> |
Willy Tarreau | b255105 | 2020-06-09 09:07:15 +0200 | [diff] [blame] | 32 | #include <haproxy/proto_sockpair.h> |
| 33 | #include <haproxy/protocol-t.h> |
| 34 | #include <haproxy/protocol.h> |
| 35 | #include <haproxy/sample.h> |
Willy Tarreau | dfd3de8 | 2020-06-04 23:46:14 +0200 | [diff] [blame] | 36 | #include <haproxy/stream.h> |
Willy Tarreau | cea0e1b | 2020-06-04 17:25:40 +0200 | [diff] [blame] | 37 | #include <haproxy/task.h> |
Willy Tarreau | 92b4f13 | 2020-06-01 11:05:15 +0200 | [diff] [blame] | 38 | #include <haproxy/time.h> |
Willy Tarreau | b255105 | 2020-06-09 09:07:15 +0200 | [diff] [blame] | 39 | #include <haproxy/tools.h> |
Willy Tarreau | dd81598 | 2007-10-16 12:25:14 +0200 | [diff] [blame] | 40 | |
Willy Tarreau | b648d63 | 2007-10-28 22:13:50 +0100 | [diff] [blame] | 41 | |
Willy Tarreau | 2698266 | 2012-09-12 23:17:10 +0200 | [diff] [blame] | 42 | /* List head of all known bind keywords */ |
| 43 | static struct bind_kw_list bind_keywords = { |
| 44 | .list = LIST_HEAD_INIT(bind_keywords.list) |
| 45 | }; |
| 46 | |
Willy Tarreau | a1d97f8 | 2019-12-10 11:18:41 +0100 | [diff] [blame] | 47 | /* list of the temporarily limited listeners because of lack of resource */ |
| 48 | static struct mt_list global_listener_queue = MT_LIST_HEAD_INIT(global_listener_queue); |
| 49 | static struct task *global_listener_queue_task; |
| 50 | static struct task *manage_global_listener_queue(struct task *t, void *context, unsigned short state); |
| 51 | |
| 52 | |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 53 | #if defined(USE_THREAD) |
| 54 | |
| 55 | struct accept_queue_ring accept_queue_rings[MAX_THREADS] __attribute__((aligned(64))) = { }; |
| 56 | |
| 57 | /* dequeue and process a pending connection from the local accept queue (single |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 58 | * consumer). Returns the accepted connection or NULL if none was found. |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 59 | */ |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 60 | struct connection *accept_queue_pop_sc(struct accept_queue_ring *ring) |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 61 | { |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 62 | unsigned int pos, next; |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 63 | struct connection *ptr; |
| 64 | struct connection **e; |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 65 | |
| 66 | pos = ring->head; |
| 67 | |
| 68 | if (pos == ring->tail) |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 69 | return NULL; |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 70 | |
| 71 | next = pos + 1; |
| 72 | if (next >= ACCEPT_QUEUE_SIZE) |
| 73 | next = 0; |
| 74 | |
| 75 | e = &ring->entry[pos]; |
| 76 | |
| 77 | /* wait for the producer to update the listener's pointer */ |
| 78 | while (1) { |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 79 | ptr = *e; |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 80 | __ha_barrier_load(); |
| 81 | if (ptr) |
| 82 | break; |
| 83 | pl_cpu_relax(); |
| 84 | } |
| 85 | |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 86 | /* release the entry */ |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 87 | *e = NULL; |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 88 | |
| 89 | __ha_barrier_store(); |
| 90 | ring->head = next; |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 91 | return ptr; |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 95 | /* tries to push a new accepted connection <conn> into ring <ring>. Returns |
| 96 | * non-zero if it succeeds, or zero if the ring is full. Supports multiple |
| 97 | * producers. |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 98 | */ |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 99 | int accept_queue_push_mp(struct accept_queue_ring *ring, struct connection *conn) |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 100 | { |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 101 | unsigned int pos, next; |
| 102 | |
| 103 | pos = ring->tail; |
| 104 | do { |
| 105 | next = pos + 1; |
| 106 | if (next >= ACCEPT_QUEUE_SIZE) |
| 107 | next = 0; |
| 108 | if (next == ring->head) |
| 109 | return 0; // ring full |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 110 | } while (unlikely(!_HA_ATOMIC_CAS(&ring->tail, &pos, next))); |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 111 | |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 112 | ring->entry[pos] = conn; |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 113 | __ha_barrier_store(); |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 114 | return 1; |
| 115 | } |
| 116 | |
| 117 | /* proceed with accepting new connections */ |
| 118 | static struct task *accept_queue_process(struct task *t, void *context, unsigned short state) |
| 119 | { |
| 120 | struct accept_queue_ring *ring = context; |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 121 | struct connection *conn; |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 122 | struct listener *li; |
Christopher Faulet | 102854c | 2019-04-30 12:17:13 +0200 | [diff] [blame] | 123 | unsigned int max_accept; |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 124 | int ret; |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 125 | |
Christopher Faulet | 102854c | 2019-04-30 12:17:13 +0200 | [diff] [blame] | 126 | /* if global.tune.maxaccept is -1, then max_accept is UINT_MAX. It |
| 127 | * is not really illimited, but it is probably enough. |
| 128 | */ |
| 129 | max_accept = global.tune.maxaccept ? global.tune.maxaccept : 64; |
| 130 | for (; max_accept; max_accept--) { |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 131 | conn = accept_queue_pop_sc(ring); |
| 132 | if (!conn) |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 133 | break; |
| 134 | |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 135 | li = __objt_listener(conn->target); |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 136 | _HA_ATOMIC_ADD(&li->thr_conn[tid], 1); |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 137 | ret = li->accept(conn); |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 138 | if (ret <= 0) { |
| 139 | /* connection was terminated by the application */ |
| 140 | continue; |
| 141 | } |
| 142 | |
| 143 | /* increase the per-process number of cumulated sessions, this |
| 144 | * may only be done once l->accept() has accepted the connection. |
| 145 | */ |
| 146 | if (!(li->options & LI_O_UNLIMITED)) { |
| 147 | HA_ATOMIC_UPDATE_MAX(&global.sps_max, |
| 148 | update_freq_ctr(&global.sess_per_sec, 1)); |
| 149 | if (li->bind_conf && li->bind_conf->is_ssl) { |
| 150 | HA_ATOMIC_UPDATE_MAX(&global.ssl_max, |
| 151 | update_freq_ctr(&global.ssl_per_sec, 1)); |
| 152 | } |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | /* ran out of budget ? Let's come here ASAP */ |
Christopher Faulet | 102854c | 2019-04-30 12:17:13 +0200 | [diff] [blame] | 157 | if (!max_accept) |
Willy Tarreau | 2bd65a7 | 2019-09-24 06:55:18 +0200 | [diff] [blame] | 158 | tasklet_wakeup(ring->tasklet); |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 159 | |
Willy Tarreau | 2bd65a7 | 2019-09-24 06:55:18 +0200 | [diff] [blame] | 160 | return NULL; |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 161 | } |
| 162 | |
| 163 | /* Initializes the accept-queues. Returns 0 on success, otherwise ERR_* flags */ |
| 164 | static int accept_queue_init() |
| 165 | { |
Willy Tarreau | 2bd65a7 | 2019-09-24 06:55:18 +0200 | [diff] [blame] | 166 | struct tasklet *t; |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 167 | int i; |
| 168 | |
| 169 | for (i = 0; i < global.nbthread; i++) { |
Willy Tarreau | 2bd65a7 | 2019-09-24 06:55:18 +0200 | [diff] [blame] | 170 | t = tasklet_new(); |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 171 | if (!t) { |
| 172 | ha_alert("Out of memory while initializing accept queue for thread %d\n", i); |
| 173 | return ERR_FATAL|ERR_ABORT; |
| 174 | } |
Willy Tarreau | 2bd65a7 | 2019-09-24 06:55:18 +0200 | [diff] [blame] | 175 | t->tid = i; |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 176 | t->process = accept_queue_process; |
| 177 | t->context = &accept_queue_rings[i]; |
Willy Tarreau | 2bd65a7 | 2019-09-24 06:55:18 +0200 | [diff] [blame] | 178 | accept_queue_rings[i].tasklet = t; |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 179 | } |
| 180 | return 0; |
| 181 | } |
| 182 | |
| 183 | REGISTER_CONFIG_POSTPARSER("multi-threaded accept queue", accept_queue_init); |
| 184 | |
| 185 | #endif // USE_THREAD |
| 186 | |
Willy Tarreau | efc0eec | 2020-09-24 07:27:06 +0200 | [diff] [blame] | 187 | /* adjust the listener's state and its proxy's listener counters if needed. |
| 188 | * It must be called under the listener's lock, but uses atomic ops to change |
| 189 | * the proxy's counters so that the proxy lock is not needed. |
| 190 | */ |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 191 | void listener_set_state(struct listener *l, enum li_state st) |
| 192 | { |
Willy Tarreau | efc0eec | 2020-09-24 07:27:06 +0200 | [diff] [blame] | 193 | struct proxy *px = l->bind_conf->frontend; |
| 194 | |
| 195 | if (px) { |
| 196 | /* from state */ |
| 197 | switch (l->state) { |
| 198 | case LI_NEW: /* first call */ |
| 199 | _HA_ATOMIC_ADD(&px->li_all, 1); |
| 200 | break; |
| 201 | case LI_INIT: |
| 202 | case LI_ASSIGNED: |
| 203 | break; |
| 204 | case LI_PAUSED: |
| 205 | _HA_ATOMIC_SUB(&px->li_paused, 1); |
| 206 | break; |
| 207 | case LI_LISTEN: |
| 208 | _HA_ATOMIC_SUB(&px->li_bound, 1); |
| 209 | break; |
| 210 | case LI_READY: |
| 211 | case LI_FULL: |
| 212 | case LI_LIMITED: |
| 213 | _HA_ATOMIC_SUB(&px->li_ready, 1); |
| 214 | break; |
| 215 | } |
| 216 | |
| 217 | /* to state */ |
| 218 | switch (st) { |
| 219 | case LI_NEW: |
| 220 | case LI_INIT: |
| 221 | case LI_ASSIGNED: |
| 222 | break; |
| 223 | case LI_PAUSED: |
Willy Tarreau | 95a3460 | 2020-10-08 15:32:21 +0200 | [diff] [blame] | 224 | BUG_ON(l->rx.fd == -1); |
Willy Tarreau | efc0eec | 2020-09-24 07:27:06 +0200 | [diff] [blame] | 225 | _HA_ATOMIC_ADD(&px->li_paused, 1); |
| 226 | break; |
| 227 | case LI_LISTEN: |
Willy Tarreau | 95a3460 | 2020-10-08 15:32:21 +0200 | [diff] [blame] | 228 | BUG_ON(l->rx.fd == -1); |
Willy Tarreau | efc0eec | 2020-09-24 07:27:06 +0200 | [diff] [blame] | 229 | _HA_ATOMIC_ADD(&px->li_bound, 1); |
| 230 | break; |
| 231 | case LI_READY: |
| 232 | case LI_FULL: |
| 233 | case LI_LIMITED: |
Willy Tarreau | 95a3460 | 2020-10-08 15:32:21 +0200 | [diff] [blame] | 234 | BUG_ON(l->rx.fd == -1); |
Willy Tarreau | efc0eec | 2020-09-24 07:27:06 +0200 | [diff] [blame] | 235 | _HA_ATOMIC_ADD(&px->li_ready, 1); |
| 236 | break; |
| 237 | } |
| 238 | } |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 239 | l->state = st; |
| 240 | } |
| 241 | |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 242 | /* This function adds the specified listener's file descriptor to the polling |
| 243 | * lists if it is in the LI_LISTEN state. The listener enters LI_READY or |
Ilya Shipitsin | 6fb0f21 | 2020-04-02 15:25:26 +0500 | [diff] [blame] | 244 | * LI_FULL state depending on its number of connections. In daemon mode, we |
Willy Tarreau | ae30253 | 2014-05-07 19:22:24 +0200 | [diff] [blame] | 245 | * also support binding only the relevant processes to their respective |
| 246 | * listeners. We don't do that in debug mode however. |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 247 | */ |
Willy Tarreau | 7834a3f | 2020-09-25 16:40:18 +0200 | [diff] [blame] | 248 | void enable_listener(struct listener *listener) |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 249 | { |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 250 | HA_SPIN_LOCK(LISTENER_LOCK, &listener->lock); |
Willy Tarreau | d6afb53 | 2020-10-09 10:35:40 +0200 | [diff] [blame] | 251 | |
| 252 | /* If this listener is supposed to be only in the master, close it in |
| 253 | * the workers. Conversely, if it's supposed to be only in the workers |
| 254 | * close it in the master. |
| 255 | */ |
Willy Tarreau | 18c20d2 | 2020-10-09 16:11:46 +0200 | [diff] [blame] | 256 | if (!!master != !!(listener->rx.flags & RX_F_MWORKER)) |
Willy Tarreau | 75c98d1 | 2020-10-09 15:55:23 +0200 | [diff] [blame] | 257 | do_unbind_listener(listener); |
Willy Tarreau | d6afb53 | 2020-10-09 10:35:40 +0200 | [diff] [blame] | 258 | |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 259 | if (listener->state == LI_LISTEN) { |
Willy Tarreau | 95a3460 | 2020-10-08 15:32:21 +0200 | [diff] [blame] | 260 | BUG_ON(listener->rx.fd == -1); |
William Lallemand | 095ba4c | 2017-06-01 17:38:50 +0200 | [diff] [blame] | 261 | if ((global.mode & (MODE_DAEMON | MODE_MWORKER)) && |
Willy Tarreau | 818a92e | 2020-09-03 07:50:19 +0200 | [diff] [blame] | 262 | !(proc_mask(listener->rx.settings->bind_proc) & pid_bit)) { |
Willy Tarreau | ae30253 | 2014-05-07 19:22:24 +0200 | [diff] [blame] | 263 | /* we don't want to enable this listener and don't |
| 264 | * want any fd event to reach it. |
| 265 | */ |
Willy Tarreau | 75c98d1 | 2020-10-09 15:55:23 +0200 | [diff] [blame] | 266 | do_unbind_listener(listener); |
Willy Tarreau | ae30253 | 2014-05-07 19:22:24 +0200 | [diff] [blame] | 267 | } |
Willy Tarreau | a8cf66b | 2019-02-27 16:49:00 +0100 | [diff] [blame] | 268 | else if (!listener->maxconn || listener->nbconn < listener->maxconn) { |
Willy Tarreau | 4b51f42 | 2020-09-25 20:32:28 +0200 | [diff] [blame] | 269 | listener->rx.proto->enable(listener); |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 270 | listener_set_state(listener, LI_READY); |
Willy Tarreau | ae30253 | 2014-05-07 19:22:24 +0200 | [diff] [blame] | 271 | } |
| 272 | else { |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 273 | listener_set_state(listener, LI_FULL); |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 274 | } |
| 275 | } |
Willy Tarreau | d6afb53 | 2020-10-09 10:35:40 +0200 | [diff] [blame] | 276 | |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 277 | HA_SPIN_UNLOCK(LISTENER_LOCK, &listener->lock); |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 278 | } |
| 279 | |
Willy Tarreau | caa7df1 | 2020-10-07 15:58:50 +0200 | [diff] [blame] | 280 | /* |
| 281 | * This function completely stops a listener. It will need to operate under the |
| 282 | * proxy's lock, the protocol's lock, and the listener's lock. The caller is |
| 283 | * responsible for indicating in lpx, lpr, lli whether the respective locks are |
| 284 | * already held (non-zero) or not (zero) so that the function picks the missing |
| 285 | * ones, in this order. The proxy's listeners count is updated and the proxy is |
| 286 | * disabled and woken up after the last one is gone. |
| 287 | */ |
| 288 | void stop_listener(struct listener *l, int lpx, int lpr, int lli) |
| 289 | { |
| 290 | struct proxy *px = l->bind_conf->frontend; |
Willy Tarreau | caa7df1 | 2020-10-07 15:58:50 +0200 | [diff] [blame] | 291 | |
| 292 | if (l->options & LI_O_NOSTOP) { |
| 293 | /* master-worker sockpairs are never closed but don't count as a |
| 294 | * job. |
| 295 | */ |
| 296 | return; |
| 297 | } |
| 298 | |
Willy Tarreau | caa7df1 | 2020-10-07 15:58:50 +0200 | [diff] [blame] | 299 | if (!lpx) |
| 300 | HA_SPIN_LOCK(PROXY_LOCK, &px->lock); |
| 301 | |
| 302 | if (!lpr) |
| 303 | HA_SPIN_LOCK(PROTO_LOCK, &proto_lock); |
| 304 | |
| 305 | if (!lli) |
| 306 | HA_SPIN_LOCK(LISTENER_LOCK, &l->lock); |
| 307 | |
| 308 | if (l->state > LI_INIT) { |
Willy Tarreau | 75c98d1 | 2020-10-09 15:55:23 +0200 | [diff] [blame] | 309 | do_unbind_listener(l); |
Willy Tarreau | caa7df1 | 2020-10-07 15:58:50 +0200 | [diff] [blame] | 310 | |
| 311 | if (l->state >= LI_ASSIGNED) |
| 312 | __delete_listener(l); |
| 313 | |
Willy Tarreau | acde152 | 2020-10-07 16:31:39 +0200 | [diff] [blame] | 314 | proxy_cond_disable(px); |
Willy Tarreau | caa7df1 | 2020-10-07 15:58:50 +0200 | [diff] [blame] | 315 | } |
| 316 | |
| 317 | if (!lli) |
| 318 | HA_SPIN_UNLOCK(LISTENER_LOCK, &l->lock); |
| 319 | |
| 320 | if (!lpr) |
| 321 | HA_SPIN_UNLOCK(PROTO_LOCK, &proto_lock); |
| 322 | |
| 323 | if (!lpx) |
| 324 | HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock); |
| 325 | } |
| 326 | |
Willy Tarreau | e03204c | 2020-10-09 17:02:21 +0200 | [diff] [blame] | 327 | /* default function called to suspend a listener: it simply passes the call to |
| 328 | * the underlying receiver. This is find for most socket-based protocols. This |
| 329 | * must be called under the listener's lock. It will return non-zero on success, |
| 330 | * 0 on failure. If no receiver-level suspend is provided, the operation is |
| 331 | * assumed to succeed. |
| 332 | */ |
| 333 | int default_suspend_listener(struct listener *l) |
| 334 | { |
| 335 | int ret = 1; |
| 336 | |
| 337 | if (!l->rx.proto->rx_suspend) |
| 338 | return 1; |
| 339 | |
| 340 | ret = l->rx.proto->rx_suspend(&l->rx); |
| 341 | return ret > 0 ? ret : 0; |
| 342 | } |
| 343 | |
| 344 | |
| 345 | /* Tries to resume a suspended listener, and returns non-zero on success or |
| 346 | * zero on failure. On certain errors, an alert or a warning might be displayed. |
| 347 | * It must be called with the listener's lock held. Depending on the listener's |
| 348 | * state and protocol, a listen() call might be used to resume operations, or a |
| 349 | * call to the receiver's resume() function might be used as well. This is |
| 350 | * suitable as a default function for TCP and UDP. This must be called with the |
| 351 | * listener's lock held. |
| 352 | */ |
| 353 | int default_resume_listener(struct listener *l) |
| 354 | { |
| 355 | int ret = 1; |
| 356 | |
| 357 | if (l->state == LI_ASSIGNED) { |
| 358 | char msg[100]; |
| 359 | int err; |
| 360 | |
| 361 | err = l->rx.proto->listen(l, msg, sizeof(msg)); |
| 362 | if (err & ERR_ALERT) |
| 363 | ha_alert("Resuming listener: %s\n", msg); |
| 364 | else if (err & ERR_WARN) |
| 365 | ha_warning("Resuming listener: %s\n", msg); |
| 366 | |
| 367 | if (err & (ERR_FATAL | ERR_ABORT)) { |
| 368 | ret = 0; |
| 369 | goto end; |
| 370 | } |
| 371 | } |
| 372 | |
| 373 | if (l->state < LI_PAUSED) { |
| 374 | ret = 0; |
| 375 | goto end; |
| 376 | } |
| 377 | |
| 378 | if (l->state == LI_PAUSED && l->rx.proto->rx_resume && |
| 379 | l->rx.proto->rx_resume(&l->rx) <= 0) |
| 380 | ret = 0; |
| 381 | end: |
| 382 | return ret; |
| 383 | } |
| 384 | |
| 385 | |
Willy Tarreau | be58c38 | 2011-07-24 18:28:10 +0200 | [diff] [blame] | 386 | /* This function tries to temporarily disable a listener, depending on the OS |
| 387 | * capabilities. Linux unbinds the listen socket after a SHUT_RD, and ignores |
| 388 | * SHUT_WR. Solaris refuses either shutdown(). OpenBSD ignores SHUT_RD but |
| 389 | * closes upon SHUT_WR and refuses to rebind. So a common validation path |
| 390 | * involves SHUT_WR && listen && SHUT_RD. In case of success, the FD's polling |
| 391 | * is disabled. It normally returns non-zero, unless an error is reported. |
| 392 | */ |
| 393 | int pause_listener(struct listener *l) |
| 394 | { |
Willy Tarreau | 58651b4 | 2020-09-24 16:03:29 +0200 | [diff] [blame] | 395 | struct proxy *px = l->bind_conf->frontend; |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 396 | int ret = 1; |
| 397 | |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 398 | HA_SPIN_LOCK(LISTENER_LOCK, &l->lock); |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 399 | |
Willy Tarreau | 02e1975 | 2020-09-23 17:17:22 +0200 | [diff] [blame] | 400 | if ((global.mode & (MODE_DAEMON | MODE_MWORKER)) && |
| 401 | !(proc_mask(l->rx.settings->bind_proc) & pid_bit)) |
| 402 | goto end; |
| 403 | |
Willy Tarreau | 9b3a932 | 2020-09-24 14:46:34 +0200 | [diff] [blame] | 404 | if (l->state <= LI_PAUSED) |
| 405 | goto end; |
| 406 | |
Willy Tarreau | e03204c | 2020-10-09 17:02:21 +0200 | [diff] [blame] | 407 | if (l->rx.proto->suspend) |
| 408 | ret = l->rx.proto->suspend(l); |
Willy Tarreau | be58c38 | 2011-07-24 18:28:10 +0200 | [diff] [blame] | 409 | |
Olivier Houchard | 859dc80 | 2019-08-08 15:47:21 +0200 | [diff] [blame] | 410 | MT_LIST_DEL(&l->wait_queue); |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 411 | |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 412 | listener_set_state(l, LI_PAUSED); |
Willy Tarreau | 58651b4 | 2020-09-24 16:03:29 +0200 | [diff] [blame] | 413 | |
| 414 | if (px && !px->li_ready) { |
| 415 | ha_warning("Paused %s %s.\n", proxy_cap_str(px->cap), px->id); |
| 416 | send_log(px, LOG_WARNING, "Paused %s %s.\n", proxy_cap_str(px->cap), px->id); |
| 417 | } |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 418 | end: |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 419 | HA_SPIN_UNLOCK(LISTENER_LOCK, &l->lock); |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 420 | return ret; |
Willy Tarreau | be58c38 | 2011-07-24 18:28:10 +0200 | [diff] [blame] | 421 | } |
| 422 | |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 423 | /* This function tries to resume a temporarily disabled listener. Paused, full, |
| 424 | * limited and disabled listeners are handled, which means that this function |
| 425 | * may replace enable_listener(). The resulting state will either be LI_READY |
| 426 | * or LI_FULL. 0 is returned in case of failure to resume (eg: dead socket). |
Willy Tarreau | ae30253 | 2014-05-07 19:22:24 +0200 | [diff] [blame] | 427 | * Listeners bound to a different process are not woken up unless we're in |
Willy Tarreau | af2fd58 | 2015-04-14 12:07:16 +0200 | [diff] [blame] | 428 | * foreground mode, and are ignored. If the listener was only in the assigned |
| 429 | * state, it's totally rebound. This can happen if a pause() has completely |
| 430 | * stopped it. If the resume fails, 0 is returned and an error might be |
| 431 | * displayed. |
Willy Tarreau | be58c38 | 2011-07-24 18:28:10 +0200 | [diff] [blame] | 432 | */ |
Willy Tarreau | 01abd02 | 2019-02-28 10:27:18 +0100 | [diff] [blame] | 433 | int resume_listener(struct listener *l) |
Willy Tarreau | be58c38 | 2011-07-24 18:28:10 +0200 | [diff] [blame] | 434 | { |
Willy Tarreau | 58651b4 | 2020-09-24 16:03:29 +0200 | [diff] [blame] | 435 | struct proxy *px = l->bind_conf->frontend; |
| 436 | int was_paused = px && px->li_paused; |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 437 | int ret = 1; |
| 438 | |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 439 | HA_SPIN_LOCK(LISTENER_LOCK, &l->lock); |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 440 | |
Willy Tarreau | f2cb169 | 2019-07-11 10:08:31 +0200 | [diff] [blame] | 441 | /* check that another thread didn't to the job in parallel (e.g. at the |
| 442 | * end of listen_accept() while we'd come from dequeue_all_listeners(). |
| 443 | */ |
Olivier Houchard | 859dc80 | 2019-08-08 15:47:21 +0200 | [diff] [blame] | 444 | if (MT_LIST_ADDED(&l->wait_queue)) |
Willy Tarreau | f2cb169 | 2019-07-11 10:08:31 +0200 | [diff] [blame] | 445 | goto end; |
| 446 | |
William Lallemand | 095ba4c | 2017-06-01 17:38:50 +0200 | [diff] [blame] | 447 | if ((global.mode & (MODE_DAEMON | MODE_MWORKER)) && |
Willy Tarreau | 818a92e | 2020-09-03 07:50:19 +0200 | [diff] [blame] | 448 | !(proc_mask(l->rx.settings->bind_proc) & pid_bit)) |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 449 | goto end; |
Willy Tarreau | 3569df3 | 2017-03-15 12:47:46 +0100 | [diff] [blame] | 450 | |
Willy Tarreau | 5d7f9ce | 2020-09-24 18:54:11 +0200 | [diff] [blame] | 451 | if (l->state == LI_READY) |
| 452 | goto end; |
Willy Tarreau | be58c38 | 2011-07-24 18:28:10 +0200 | [diff] [blame] | 453 | |
Willy Tarreau | e03204c | 2020-10-09 17:02:21 +0200 | [diff] [blame] | 454 | if (l->rx.proto->resume) |
| 455 | ret = l->rx.proto->resume(l); |
Willy Tarreau | be58c38 | 2011-07-24 18:28:10 +0200 | [diff] [blame] | 456 | |
Willy Tarreau | a8cf66b | 2019-02-27 16:49:00 +0100 | [diff] [blame] | 457 | if (l->maxconn && l->nbconn >= l->maxconn) { |
Willy Tarreau | 4b51f42 | 2020-09-25 20:32:28 +0200 | [diff] [blame] | 458 | l->rx.proto->disable(l); |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 459 | listener_set_state(l, LI_FULL); |
Willy Tarreau | 58651b4 | 2020-09-24 16:03:29 +0200 | [diff] [blame] | 460 | goto done; |
Willy Tarreau | be58c38 | 2011-07-24 18:28:10 +0200 | [diff] [blame] | 461 | } |
| 462 | |
Willy Tarreau | 4b51f42 | 2020-09-25 20:32:28 +0200 | [diff] [blame] | 463 | l->rx.proto->enable(l); |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 464 | listener_set_state(l, LI_READY); |
Willy Tarreau | 58651b4 | 2020-09-24 16:03:29 +0200 | [diff] [blame] | 465 | |
| 466 | done: |
| 467 | if (was_paused && !px->li_paused) { |
| 468 | ha_warning("Resumed %s %s.\n", proxy_cap_str(px->cap), px->id); |
| 469 | send_log(px, LOG_WARNING, "Resumed %s %s.\n", proxy_cap_str(px->cap), px->id); |
| 470 | } |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 471 | end: |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 472 | HA_SPIN_UNLOCK(LISTENER_LOCK, &l->lock); |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 473 | return ret; |
| 474 | } |
| 475 | |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 476 | /* Marks a ready listener as full so that the stream code tries to re-enable |
Willy Tarreau | 6279371 | 2011-07-24 19:23:38 +0200 | [diff] [blame] | 477 | * it upon next close() using resume_listener(). |
| 478 | */ |
Christopher Faulet | 5580ba2 | 2017-08-28 15:29:20 +0200 | [diff] [blame] | 479 | static void listener_full(struct listener *l) |
Willy Tarreau | 6279371 | 2011-07-24 19:23:38 +0200 | [diff] [blame] | 480 | { |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 481 | HA_SPIN_LOCK(LISTENER_LOCK, &l->lock); |
Willy Tarreau | 6279371 | 2011-07-24 19:23:38 +0200 | [diff] [blame] | 482 | if (l->state >= LI_READY) { |
Olivier Houchard | 859dc80 | 2019-08-08 15:47:21 +0200 | [diff] [blame] | 483 | MT_LIST_DEL(&l->wait_queue); |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 484 | if (l->state != LI_FULL) { |
Willy Tarreau | 4b51f42 | 2020-09-25 20:32:28 +0200 | [diff] [blame] | 485 | l->rx.proto->disable(l); |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 486 | listener_set_state(l, LI_FULL); |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 487 | } |
Willy Tarreau | 6279371 | 2011-07-24 19:23:38 +0200 | [diff] [blame] | 488 | } |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 489 | HA_SPIN_UNLOCK(LISTENER_LOCK, &l->lock); |
Willy Tarreau | 6279371 | 2011-07-24 19:23:38 +0200 | [diff] [blame] | 490 | } |
| 491 | |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 492 | /* Marks a ready listener as limited so that we only try to re-enable it when |
| 493 | * resources are free again. It will be queued into the specified queue. |
| 494 | */ |
Olivier Houchard | 859dc80 | 2019-08-08 15:47:21 +0200 | [diff] [blame] | 495 | static void limit_listener(struct listener *l, struct mt_list *list) |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 496 | { |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 497 | HA_SPIN_LOCK(LISTENER_LOCK, &l->lock); |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 498 | if (l->state == LI_READY) { |
Willy Tarreau | de4db17 | 2020-07-10 08:10:29 +0200 | [diff] [blame] | 499 | MT_LIST_TRY_ADDQ(list, &l->wait_queue); |
Willy Tarreau | 4b51f42 | 2020-09-25 20:32:28 +0200 | [diff] [blame] | 500 | l->rx.proto->disable(l); |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 501 | listener_set_state(l, LI_LIMITED); |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 502 | } |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 503 | HA_SPIN_UNLOCK(LISTENER_LOCK, &l->lock); |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 504 | } |
| 505 | |
Willy Tarreau | 241797a | 2019-12-10 14:10:52 +0100 | [diff] [blame] | 506 | /* Dequeues all listeners waiting for a resource the global wait queue */ |
| 507 | void dequeue_all_listeners() |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 508 | { |
Willy Tarreau | 01abd02 | 2019-02-28 10:27:18 +0100 | [diff] [blame] | 509 | struct listener *listener; |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 510 | |
Willy Tarreau | 241797a | 2019-12-10 14:10:52 +0100 | [diff] [blame] | 511 | while ((listener = MT_LIST_POP(&global_listener_queue, struct listener *, wait_queue))) { |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 512 | /* This cannot fail because the listeners are by definition in |
Willy Tarreau | 01abd02 | 2019-02-28 10:27:18 +0100 | [diff] [blame] | 513 | * the LI_LIMITED state. |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 514 | */ |
Willy Tarreau | 01abd02 | 2019-02-28 10:27:18 +0100 | [diff] [blame] | 515 | resume_listener(listener); |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 516 | } |
| 517 | } |
| 518 | |
Willy Tarreau | 241797a | 2019-12-10 14:10:52 +0100 | [diff] [blame] | 519 | /* Dequeues all listeners waiting for a resource in proxy <px>'s queue */ |
| 520 | void dequeue_proxy_listeners(struct proxy *px) |
| 521 | { |
| 522 | struct listener *listener; |
| 523 | |
| 524 | while ((listener = MT_LIST_POP(&px->listener_queue, struct listener *, wait_queue))) { |
| 525 | /* This cannot fail because the listeners are by definition in |
| 526 | * the LI_LIMITED state. |
| 527 | */ |
| 528 | resume_listener(listener); |
| 529 | } |
| 530 | } |
| 531 | |
Willy Tarreau | 7b2febd | 2020-10-09 17:18:29 +0200 | [diff] [blame] | 532 | |
| 533 | /* default function used to unbind a listener. This is for use by standard |
| 534 | * protocols working on top of accepted sockets. The receiver's rx_unbind() |
| 535 | * will automatically be used after the listener is disabled if the socket is |
| 536 | * still bound. This must be used under the listener's lock. |
Christopher Faulet | 510c0d6 | 2018-03-16 10:04:47 +0100 | [diff] [blame] | 537 | */ |
Willy Tarreau | 7b2febd | 2020-10-09 17:18:29 +0200 | [diff] [blame] | 538 | void default_unbind_listener(struct listener *listener) |
Willy Tarreau | b648d63 | 2007-10-28 22:13:50 +0100 | [diff] [blame] | 539 | { |
Willy Tarreau | 87acd4e | 2020-10-08 15:36:46 +0200 | [diff] [blame] | 540 | if (listener->state <= LI_ASSIGNED) |
| 541 | goto out_close; |
| 542 | |
| 543 | if (listener->rx.fd == -1) { |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 544 | listener_set_state(listener, LI_ASSIGNED); |
Willy Tarreau | 87acd4e | 2020-10-08 15:36:46 +0200 | [diff] [blame] | 545 | goto out_close; |
| 546 | } |
| 547 | |
Willy Tarreau | f58b8db | 2020-10-09 16:32:08 +0200 | [diff] [blame] | 548 | if (listener->state >= LI_READY) { |
| 549 | listener->rx.proto->disable(listener); |
| 550 | if (listener->rx.flags & RX_F_BOUND) |
Willy Tarreau | 87acd4e | 2020-10-08 15:36:46 +0200 | [diff] [blame] | 551 | listener_set_state(listener, LI_LISTEN); |
Willy Tarreau | b6607bf | 2020-09-23 16:24:23 +0200 | [diff] [blame] | 552 | } |
| 553 | |
Willy Tarreau | 87acd4e | 2020-10-08 15:36:46 +0200 | [diff] [blame] | 554 | out_close: |
Willy Tarreau | f58b8db | 2020-10-09 16:32:08 +0200 | [diff] [blame] | 555 | if (listener->rx.flags & RX_F_BOUND) |
| 556 | listener->rx.proto->rx_unbind(&listener->rx); |
Willy Tarreau | 7b2febd | 2020-10-09 17:18:29 +0200 | [diff] [blame] | 557 | } |
| 558 | |
| 559 | /* This function closes the listening socket for the specified listener, |
| 560 | * provided that it's already in a listening state. The protocol's unbind() |
| 561 | * is called to put the listener into LI_ASSIGNED or LI_LISTEN and handle |
| 562 | * the unbinding tasks. The listener enters then the LI_ASSIGNED state if |
| 563 | * the receiver is unbound. Must be called with the lock held. |
| 564 | */ |
| 565 | void do_unbind_listener(struct listener *listener) |
| 566 | { |
| 567 | MT_LIST_DEL(&listener->wait_queue); |
| 568 | |
| 569 | if (listener->rx.proto->unbind) |
| 570 | listener->rx.proto->unbind(listener); |
Willy Tarreau | 374e9af | 2020-10-09 15:47:17 +0200 | [diff] [blame] | 571 | |
Willy Tarreau | f58b8db | 2020-10-09 16:32:08 +0200 | [diff] [blame] | 572 | /* we may have to downgrade the listener if the rx was closed */ |
| 573 | if (!(listener->rx.flags & RX_F_BOUND) && listener->state > LI_ASSIGNED) |
Willy Tarreau | 374e9af | 2020-10-09 15:47:17 +0200 | [diff] [blame] | 574 | listener_set_state(listener, LI_ASSIGNED); |
Willy Tarreau | bbd09b9 | 2017-11-05 11:38:44 +0100 | [diff] [blame] | 575 | } |
| 576 | |
Olivier Houchard | 1fc0516 | 2017-04-06 01:05:05 +0200 | [diff] [blame] | 577 | /* This function closes the listening socket for the specified listener, |
| 578 | * provided that it's already in a listening state. The listener enters the |
Willy Tarreau | 75c98d1 | 2020-10-09 15:55:23 +0200 | [diff] [blame] | 579 | * LI_ASSIGNED state, except if the FD is not closed, in which case it may |
| 580 | * remain in LI_LISTEN. This function is intended to be used as a generic |
Willy Tarreau | bbd09b9 | 2017-11-05 11:38:44 +0100 | [diff] [blame] | 581 | * function for standard protocols. |
Olivier Houchard | 1fc0516 | 2017-04-06 01:05:05 +0200 | [diff] [blame] | 582 | */ |
Willy Tarreau | bbd09b9 | 2017-11-05 11:38:44 +0100 | [diff] [blame] | 583 | void unbind_listener(struct listener *listener) |
Olivier Houchard | 1fc0516 | 2017-04-06 01:05:05 +0200 | [diff] [blame] | 584 | { |
Christopher Faulet | 510c0d6 | 2018-03-16 10:04:47 +0100 | [diff] [blame] | 585 | HA_SPIN_LOCK(LISTENER_LOCK, &listener->lock); |
Willy Tarreau | 75c98d1 | 2020-10-09 15:55:23 +0200 | [diff] [blame] | 586 | do_unbind_listener(listener); |
Christopher Faulet | 510c0d6 | 2018-03-16 10:04:47 +0100 | [diff] [blame] | 587 | HA_SPIN_UNLOCK(LISTENER_LOCK, &listener->lock); |
Olivier Houchard | 1fc0516 | 2017-04-06 01:05:05 +0200 | [diff] [blame] | 588 | } |
| 589 | |
Willy Tarreau | 0de59fd | 2017-09-15 08:10:44 +0200 | [diff] [blame] | 590 | /* creates one or multiple listeners for bind_conf <bc> on sockaddr <ss> on port |
| 591 | * range <portl> to <porth>, and possibly attached to fd <fd> (or -1 for auto |
Willy Tarreau | 9b3178d | 2020-09-16 17:58:55 +0200 | [diff] [blame] | 592 | * allocation). The address family is taken from ss->ss_family, and the protocol |
| 593 | * passed in <proto> must be usable on this family. The number of jobs and |
| 594 | * listeners is automatically increased by the number of listeners created. It |
| 595 | * returns non-zero on success, zero on error with the error message set in <err>. |
Willy Tarreau | 0de59fd | 2017-09-15 08:10:44 +0200 | [diff] [blame] | 596 | */ |
| 597 | int create_listeners(struct bind_conf *bc, const struct sockaddr_storage *ss, |
Willy Tarreau | 9b3178d | 2020-09-16 17:58:55 +0200 | [diff] [blame] | 598 | int portl, int porth, int fd, struct protocol *proto, char **err) |
Willy Tarreau | 0de59fd | 2017-09-15 08:10:44 +0200 | [diff] [blame] | 599 | { |
Willy Tarreau | 0de59fd | 2017-09-15 08:10:44 +0200 | [diff] [blame] | 600 | struct listener *l; |
| 601 | int port; |
| 602 | |
Willy Tarreau | 0de59fd | 2017-09-15 08:10:44 +0200 | [diff] [blame] | 603 | for (port = portl; port <= porth; port++) { |
| 604 | l = calloc(1, sizeof(*l)); |
| 605 | if (!l) { |
| 606 | memprintf(err, "out of memory"); |
| 607 | return 0; |
| 608 | } |
| 609 | l->obj_type = OBJ_TYPE_LISTENER; |
| 610 | LIST_ADDQ(&bc->frontend->conf.listeners, &l->by_fe); |
| 611 | LIST_ADDQ(&bc->listeners, &l->by_bind); |
| 612 | l->bind_conf = bc; |
Willy Tarreau | 0fce6bc | 2020-09-03 07:46:06 +0200 | [diff] [blame] | 613 | l->rx.settings = &bc->settings; |
Willy Tarreau | eef4542 | 2020-09-03 10:05:03 +0200 | [diff] [blame] | 614 | l->rx.owner = l; |
Willy Tarreau | 38ba647 | 2020-08-27 08:16:52 +0200 | [diff] [blame] | 615 | l->rx.fd = fd; |
Willy Tarreau | 3715906 | 2020-08-27 07:48:42 +0200 | [diff] [blame] | 616 | memcpy(&l->rx.addr, ss, sizeof(*ss)); |
Olivier Houchard | 859dc80 | 2019-08-08 15:47:21 +0200 | [diff] [blame] | 617 | MT_LIST_INIT(&l->wait_queue); |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 618 | listener_set_state(l, LI_INIT); |
Willy Tarreau | 0de59fd | 2017-09-15 08:10:44 +0200 | [diff] [blame] | 619 | |
| 620 | proto->add(l, port); |
| 621 | |
Willy Tarreau | 909c23b | 2020-09-15 13:50:58 +0200 | [diff] [blame] | 622 | if (fd != -1) |
Willy Tarreau | 43046fa | 2020-09-01 15:41:59 +0200 | [diff] [blame] | 623 | l->rx.flags |= RX_F_INHERITED; |
William Lallemand | 75ea0a0 | 2017-11-15 19:02:58 +0100 | [diff] [blame] | 624 | |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 625 | HA_SPIN_INIT(&l->lock); |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 626 | _HA_ATOMIC_ADD(&jobs, 1); |
| 627 | _HA_ATOMIC_ADD(&listeners, 1); |
Willy Tarreau | 0de59fd | 2017-09-15 08:10:44 +0200 | [diff] [blame] | 628 | } |
| 629 | return 1; |
| 630 | } |
| 631 | |
Willy Tarreau | 1a64d16 | 2007-10-28 22:26:05 +0100 | [diff] [blame] | 632 | /* Delete a listener from its protocol's list of listeners. The listener's |
| 633 | * state is automatically updated from LI_ASSIGNED to LI_INIT. The protocol's |
Willy Tarreau | 2cc5bae | 2017-09-15 08:18:11 +0200 | [diff] [blame] | 634 | * number of listeners is updated, as well as the global number of listeners |
| 635 | * and jobs. Note that the listener must have previously been unbound. This |
Willy Tarreau | b4c083f | 2020-10-07 15:36:16 +0200 | [diff] [blame] | 636 | * is a low-level function expected to be called with the proto_lock and the |
| 637 | * listener's lock held. |
Willy Tarreau | 1a64d16 | 2007-10-28 22:26:05 +0100 | [diff] [blame] | 638 | */ |
Willy Tarreau | b4c083f | 2020-10-07 15:36:16 +0200 | [diff] [blame] | 639 | void __delete_listener(struct listener *listener) |
Willy Tarreau | 1a64d16 | 2007-10-28 22:26:05 +0100 | [diff] [blame] | 640 | { |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 641 | if (listener->state == LI_ASSIGNED) { |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 642 | listener_set_state(listener, LI_INIT); |
Willy Tarreau | b743661 | 2020-08-28 19:51:44 +0200 | [diff] [blame] | 643 | LIST_DEL(&listener->rx.proto_list); |
Willy Tarreau | d7f331c | 2020-09-25 17:01:43 +0200 | [diff] [blame] | 644 | listener->rx.proto->nb_receivers--; |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 645 | _HA_ATOMIC_SUB(&jobs, 1); |
| 646 | _HA_ATOMIC_SUB(&listeners, 1); |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 647 | } |
Willy Tarreau | b4c083f | 2020-10-07 15:36:16 +0200 | [diff] [blame] | 648 | } |
| 649 | |
| 650 | /* Delete a listener from its protocol's list of listeners (please check |
| 651 | * __delete_listener() above). The proto_lock and the listener's lock will |
| 652 | * be grabbed in this order. |
| 653 | */ |
| 654 | void delete_listener(struct listener *listener) |
| 655 | { |
| 656 | HA_SPIN_LOCK(PROTO_LOCK, &proto_lock); |
| 657 | HA_SPIN_LOCK(LISTENER_LOCK, &listener->lock); |
| 658 | __delete_listener(listener); |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 659 | HA_SPIN_UNLOCK(LISTENER_LOCK, &listener->lock); |
Willy Tarreau | 6ee9f8d | 2019-08-26 10:55:52 +0200 | [diff] [blame] | 660 | HA_SPIN_UNLOCK(PROTO_LOCK, &proto_lock); |
Willy Tarreau | 1a64d16 | 2007-10-28 22:26:05 +0100 | [diff] [blame] | 661 | } |
| 662 | |
Willy Tarreau | e2711c7 | 2019-02-27 15:39:41 +0100 | [diff] [blame] | 663 | /* Returns a suitable value for a listener's backlog. It uses the listener's, |
| 664 | * otherwise the frontend's backlog, otherwise the listener's maxconn, |
| 665 | * otherwise the frontend's maxconn, otherwise 1024. |
| 666 | */ |
| 667 | int listener_backlog(const struct listener *l) |
| 668 | { |
| 669 | if (l->backlog) |
| 670 | return l->backlog; |
| 671 | |
| 672 | if (l->bind_conf->frontend->backlog) |
| 673 | return l->bind_conf->frontend->backlog; |
| 674 | |
| 675 | if (l->maxconn) |
| 676 | return l->maxconn; |
| 677 | |
| 678 | if (l->bind_conf->frontend->maxconn) |
| 679 | return l->bind_conf->frontend->maxconn; |
| 680 | |
| 681 | return 1024; |
| 682 | } |
| 683 | |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 684 | /* This function is called on a read event from a listening socket, corresponding |
| 685 | * to an accept. It tries to accept as many connections as possible, and for each |
| 686 | * calls the listener's accept handler (generally the frontend's accept handler). |
| 687 | */ |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 688 | void listener_accept(int fd) |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 689 | { |
| 690 | struct listener *l = fdtab[fd].owner; |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 691 | struct connection *cli_conn; |
Olivier Houchard | d16a9df | 2019-02-25 16:18:16 +0100 | [diff] [blame] | 692 | struct proxy *p; |
Christopher Faulet | 102854c | 2019-04-30 12:17:13 +0200 | [diff] [blame] | 693 | unsigned int max_accept; |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 694 | int next_conn = 0; |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 695 | int next_feconn = 0; |
| 696 | int next_actconn = 0; |
Willy Tarreau | bb66030 | 2014-05-07 19:47:02 +0200 | [diff] [blame] | 697 | int expire; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 698 | int cfd; |
| 699 | int ret; |
Willy Tarreau | 818dca5 | 2014-01-31 19:40:19 +0100 | [diff] [blame] | 700 | #ifdef USE_ACCEPT4 |
| 701 | static int accept4_broken; |
| 702 | #endif |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 703 | |
Olivier Houchard | d16a9df | 2019-02-25 16:18:16 +0100 | [diff] [blame] | 704 | if (!l) |
| 705 | return; |
| 706 | p = l->bind_conf->frontend; |
Christopher Faulet | 102854c | 2019-04-30 12:17:13 +0200 | [diff] [blame] | 707 | |
| 708 | /* if l->maxaccept is -1, then max_accept is UINT_MAX. It is not really |
| 709 | * illimited, but it is probably enough. |
| 710 | */ |
Olivier Houchard | d16a9df | 2019-02-25 16:18:16 +0100 | [diff] [blame] | 711 | max_accept = l->maxaccept ? l->maxaccept : 1; |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 712 | |
Willy Tarreau | 93e7c00 | 2013-10-07 18:51:07 +0200 | [diff] [blame] | 713 | if (!(l->options & LI_O_UNLIMITED) && global.sps_lim) { |
| 714 | int max = freq_ctr_remain(&global.sess_per_sec, global.sps_lim, 0); |
Willy Tarreau | 93e7c00 | 2013-10-07 18:51:07 +0200 | [diff] [blame] | 715 | |
| 716 | if (unlikely(!max)) { |
| 717 | /* frontend accept rate limit was reached */ |
Willy Tarreau | 93e7c00 | 2013-10-07 18:51:07 +0200 | [diff] [blame] | 718 | expire = tick_add(now_ms, next_event_delay(&global.sess_per_sec, global.sps_lim, 0)); |
Willy Tarreau | 0591bf7 | 2019-12-10 12:01:21 +0100 | [diff] [blame] | 719 | goto limit_global; |
Willy Tarreau | 93e7c00 | 2013-10-07 18:51:07 +0200 | [diff] [blame] | 720 | } |
| 721 | |
| 722 | if (max_accept > max) |
| 723 | max_accept = max; |
| 724 | } |
| 725 | |
| 726 | if (!(l->options & LI_O_UNLIMITED) && global.cps_lim) { |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 727 | int max = freq_ctr_remain(&global.conn_per_sec, global.cps_lim, 0); |
| 728 | |
| 729 | if (unlikely(!max)) { |
| 730 | /* frontend accept rate limit was reached */ |
Willy Tarreau | 93e7c00 | 2013-10-07 18:51:07 +0200 | [diff] [blame] | 731 | expire = tick_add(now_ms, next_event_delay(&global.conn_per_sec, global.cps_lim, 0)); |
Willy Tarreau | 0591bf7 | 2019-12-10 12:01:21 +0100 | [diff] [blame] | 732 | goto limit_global; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 733 | } |
| 734 | |
| 735 | if (max_accept > max) |
| 736 | max_accept = max; |
| 737 | } |
Willy Tarreau | e43d532 | 2013-10-07 20:01:52 +0200 | [diff] [blame] | 738 | #ifdef USE_OPENSSL |
| 739 | if (!(l->options & LI_O_UNLIMITED) && global.ssl_lim && l->bind_conf && l->bind_conf->is_ssl) { |
| 740 | int max = freq_ctr_remain(&global.ssl_per_sec, global.ssl_lim, 0); |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 741 | |
Willy Tarreau | e43d532 | 2013-10-07 20:01:52 +0200 | [diff] [blame] | 742 | if (unlikely(!max)) { |
| 743 | /* frontend accept rate limit was reached */ |
Willy Tarreau | e43d532 | 2013-10-07 20:01:52 +0200 | [diff] [blame] | 744 | expire = tick_add(now_ms, next_event_delay(&global.ssl_per_sec, global.ssl_lim, 0)); |
Willy Tarreau | 0591bf7 | 2019-12-10 12:01:21 +0100 | [diff] [blame] | 745 | goto limit_global; |
Willy Tarreau | e43d532 | 2013-10-07 20:01:52 +0200 | [diff] [blame] | 746 | } |
| 747 | |
| 748 | if (max_accept > max) |
| 749 | max_accept = max; |
| 750 | } |
| 751 | #endif |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 752 | if (p && p->fe_sps_lim) { |
| 753 | int max = freq_ctr_remain(&p->fe_sess_per_sec, p->fe_sps_lim, 0); |
| 754 | |
| 755 | if (unlikely(!max)) { |
| 756 | /* frontend accept rate limit was reached */ |
Willy Tarreau | 0591bf7 | 2019-12-10 12:01:21 +0100 | [diff] [blame] | 757 | expire = tick_add(now_ms, next_event_delay(&p->fe_sess_per_sec, p->fe_sps_lim, 0)); |
| 758 | goto limit_proxy; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 759 | } |
| 760 | |
| 761 | if (max_accept > max) |
| 762 | max_accept = max; |
| 763 | } |
| 764 | |
| 765 | /* Note: if we fail to allocate a connection because of configured |
| 766 | * limits, we'll schedule a new attempt worst 1 second later in the |
| 767 | * worst case. If we fail due to system limits or temporary resource |
| 768 | * shortage, we try again 100ms later in the worst case. |
| 769 | */ |
Christopher Faulet | 102854c | 2019-04-30 12:17:13 +0200 | [diff] [blame] | 770 | for (; max_accept; next_conn = next_feconn = next_actconn = 0, max_accept--) { |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 771 | struct sockaddr_storage addr; |
| 772 | socklen_t laddr = sizeof(addr); |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 773 | unsigned int count; |
Willy Tarreau | af613e8 | 2020-06-05 08:40:51 +0200 | [diff] [blame] | 774 | __decl_thread(unsigned long mask); |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 775 | |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 776 | /* pre-increase the number of connections without going too far. |
| 777 | * We process the listener, then the proxy, then the process. |
| 778 | * We know which ones to unroll based on the next_xxx value. |
| 779 | */ |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 780 | do { |
| 781 | count = l->nbconn; |
Willy Tarreau | 93604ed | 2019-11-15 10:20:07 +0100 | [diff] [blame] | 782 | if (unlikely(l->maxconn && count >= l->maxconn)) { |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 783 | /* the listener was marked full or another |
| 784 | * thread is going to do it. |
| 785 | */ |
| 786 | next_conn = 0; |
Willy Tarreau | 93604ed | 2019-11-15 10:20:07 +0100 | [diff] [blame] | 787 | listener_full(l); |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 788 | goto end; |
| 789 | } |
| 790 | next_conn = count + 1; |
David Carlier | 5671662 | 2019-03-27 16:08:42 +0000 | [diff] [blame] | 791 | } while (!_HA_ATOMIC_CAS(&l->nbconn, (int *)(&count), next_conn)); |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 792 | |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 793 | if (p) { |
| 794 | do { |
| 795 | count = p->feconn; |
Willy Tarreau | 93604ed | 2019-11-15 10:20:07 +0100 | [diff] [blame] | 796 | if (unlikely(count >= p->maxconn)) { |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 797 | /* the frontend was marked full or another |
| 798 | * thread is going to do it. |
| 799 | */ |
| 800 | next_feconn = 0; |
Willy Tarreau | 0591bf7 | 2019-12-10 12:01:21 +0100 | [diff] [blame] | 801 | expire = TICK_ETERNITY; |
| 802 | goto limit_proxy; |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 803 | } |
| 804 | next_feconn = count + 1; |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 805 | } while (!_HA_ATOMIC_CAS(&p->feconn, &count, next_feconn)); |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 806 | } |
| 807 | |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 808 | if (!(l->options & LI_O_UNLIMITED)) { |
| 809 | do { |
| 810 | count = actconn; |
Willy Tarreau | 93604ed | 2019-11-15 10:20:07 +0100 | [diff] [blame] | 811 | if (unlikely(count >= global.maxconn)) { |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 812 | /* the process was marked full or another |
| 813 | * thread is going to do it. |
| 814 | */ |
| 815 | next_actconn = 0; |
Willy Tarreau | 0591bf7 | 2019-12-10 12:01:21 +0100 | [diff] [blame] | 816 | expire = tick_add(now_ms, 1000); /* try again in 1 second */ |
| 817 | goto limit_global; |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 818 | } |
| 819 | next_actconn = count + 1; |
David Carlier | 5671662 | 2019-03-27 16:08:42 +0000 | [diff] [blame] | 820 | } while (!_HA_ATOMIC_CAS(&actconn, (int *)(&count), next_actconn)); |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 821 | } |
| 822 | |
William Lallemand | 2fe7dd0 | 2018-09-11 16:51:29 +0200 | [diff] [blame] | 823 | /* with sockpair@ we don't want to do an accept */ |
Willy Tarreau | 3715906 | 2020-08-27 07:48:42 +0200 | [diff] [blame] | 824 | if (unlikely(l->rx.addr.ss_family == AF_CUST_SOCKPAIR)) { |
William Lallemand | 2fe7dd0 | 2018-09-11 16:51:29 +0200 | [diff] [blame] | 825 | if ((cfd = recv_fd_uxst(fd)) != -1) |
William Lallemand | d913800 | 2018-11-27 12:02:39 +0100 | [diff] [blame] | 826 | fcntl(cfd, F_SETFL, O_NONBLOCK); |
Willy Tarreau | 888d567 | 2019-01-27 18:34:12 +0100 | [diff] [blame] | 827 | /* just like with UNIX sockets, only the family is filled */ |
| 828 | addr.ss_family = AF_UNIX; |
| 829 | laddr = sizeof(addr.ss_family); |
William Lallemand | 2fe7dd0 | 2018-09-11 16:51:29 +0200 | [diff] [blame] | 830 | } else |
| 831 | |
Willy Tarreau | 1bc4aab | 2012-10-08 20:11:03 +0200 | [diff] [blame] | 832 | #ifdef USE_ACCEPT4 |
Willy Tarreau | 818dca5 | 2014-01-31 19:40:19 +0100 | [diff] [blame] | 833 | /* only call accept4() if it's known to be safe, otherwise |
| 834 | * fallback to the legacy accept() + fcntl(). |
| 835 | */ |
| 836 | if (unlikely(accept4_broken || |
William Lallemand | d913800 | 2018-11-27 12:02:39 +0100 | [diff] [blame] | 837 | ((cfd = accept4(fd, (struct sockaddr *)&addr, &laddr, SOCK_NONBLOCK)) == -1 && |
Willy Tarreau | 818dca5 | 2014-01-31 19:40:19 +0100 | [diff] [blame] | 838 | (errno == ENOSYS || errno == EINVAL || errno == EBADF) && |
| 839 | (accept4_broken = 1)))) |
| 840 | #endif |
Willy Tarreau | 6b3b0d4 | 2012-10-22 19:32:55 +0200 | [diff] [blame] | 841 | if ((cfd = accept(fd, (struct sockaddr *)&addr, &laddr)) != -1) |
William Lallemand | d913800 | 2018-11-27 12:02:39 +0100 | [diff] [blame] | 842 | fcntl(cfd, F_SETFL, O_NONBLOCK); |
Willy Tarreau | 818dca5 | 2014-01-31 19:40:19 +0100 | [diff] [blame] | 843 | |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 844 | if (unlikely(cfd == -1)) { |
| 845 | switch (errno) { |
| 846 | case EAGAIN: |
Willy Tarreau | 20aeb1c | 2019-12-10 08:42:21 +0100 | [diff] [blame] | 847 | if (fdtab[fd].ev & (FD_POLL_HUP|FD_POLL_ERR)) { |
Willy Tarreau | bb66030 | 2014-05-07 19:47:02 +0200 | [diff] [blame] | 848 | /* the listening socket might have been disabled in a shared |
| 849 | * process and we're a collateral victim. We'll just pause for |
| 850 | * a while in case it comes back. In the mean time, we need to |
| 851 | * clear this sticky flag. |
| 852 | */ |
Willy Tarreau | 20aeb1c | 2019-12-10 08:42:21 +0100 | [diff] [blame] | 853 | _HA_ATOMIC_AND(&fdtab[fd].ev, ~(FD_POLL_HUP|FD_POLL_ERR)); |
Willy Tarreau | bb66030 | 2014-05-07 19:47:02 +0200 | [diff] [blame] | 854 | goto transient_error; |
| 855 | } |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 856 | goto end; /* nothing more to accept */ |
Willy Tarreau | bb66030 | 2014-05-07 19:47:02 +0200 | [diff] [blame] | 857 | case EINVAL: |
| 858 | /* might be trying to accept on a shut fd (eg: soft stop) */ |
| 859 | goto transient_error; |
Willy Tarreau | a593ec5 | 2014-01-20 21:21:30 +0100 | [diff] [blame] | 860 | case EINTR: |
| 861 | case ECONNABORTED: |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 862 | _HA_ATOMIC_SUB(&l->nbconn, 1); |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 863 | if (p) |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 864 | _HA_ATOMIC_SUB(&p->feconn, 1); |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 865 | if (!(l->options & LI_O_UNLIMITED)) |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 866 | _HA_ATOMIC_SUB(&actconn, 1); |
Willy Tarreau | a593ec5 | 2014-01-20 21:21:30 +0100 | [diff] [blame] | 867 | continue; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 868 | case ENFILE: |
| 869 | if (p) |
| 870 | send_log(p, LOG_EMERG, |
Willy Tarreau | c5532ac | 2018-01-29 15:06:04 +0100 | [diff] [blame] | 871 | "Proxy %s reached system FD limit (maxsock=%d). Please check system tunables.\n", |
| 872 | p->id, global.maxsock); |
Willy Tarreau | bb66030 | 2014-05-07 19:47:02 +0200 | [diff] [blame] | 873 | goto transient_error; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 874 | case EMFILE: |
| 875 | if (p) |
| 876 | send_log(p, LOG_EMERG, |
Willy Tarreau | c5532ac | 2018-01-29 15:06:04 +0100 | [diff] [blame] | 877 | "Proxy %s reached process FD limit (maxsock=%d). Please check 'ulimit-n' and restart.\n", |
| 878 | p->id, global.maxsock); |
Willy Tarreau | bb66030 | 2014-05-07 19:47:02 +0200 | [diff] [blame] | 879 | goto transient_error; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 880 | case ENOBUFS: |
| 881 | case ENOMEM: |
| 882 | if (p) |
| 883 | send_log(p, LOG_EMERG, |
Willy Tarreau | c5532ac | 2018-01-29 15:06:04 +0100 | [diff] [blame] | 884 | "Proxy %s reached system memory limit (maxsock=%d). Please check system tunables.\n", |
| 885 | p->id, global.maxsock); |
Willy Tarreau | bb66030 | 2014-05-07 19:47:02 +0200 | [diff] [blame] | 886 | goto transient_error; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 887 | default: |
Willy Tarreau | a593ec5 | 2014-01-20 21:21:30 +0100 | [diff] [blame] | 888 | /* unexpected result, let's give up and let other tasks run */ |
Willy Tarreau | 9207993 | 2019-12-10 09:30:05 +0100 | [diff] [blame] | 889 | max_accept = 0; |
| 890 | goto end; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 891 | } |
| 892 | } |
| 893 | |
William Lallemand | d913800 | 2018-11-27 12:02:39 +0100 | [diff] [blame] | 894 | /* we don't want to leak the FD upon reload if it's in the master */ |
| 895 | if (unlikely(master == 1)) |
| 896 | fcntl(cfd, F_SETFD, FD_CLOEXEC); |
| 897 | |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 898 | /* we'll have to at least allocate a connection, assign the listener |
| 899 | * to conn->target, set the source address, and set the fd. |
| 900 | */ |
| 901 | cli_conn = conn_new(&l->obj_type); |
| 902 | if (cli_conn) { |
| 903 | cli_conn->handle.fd = cfd; |
| 904 | cli_conn->flags |= CO_FL_ADDR_FROM_SET; |
| 905 | if (!sockaddr_alloc(&cli_conn->src, &addr, laddr)) { |
| 906 | conn_free(cli_conn); |
| 907 | cli_conn = NULL; |
| 908 | } |
| 909 | } |
| 910 | |
| 911 | if (!cli_conn) { |
| 912 | /* no more memory, give up! */ |
| 913 | close(cfd); |
| 914 | continue; |
| 915 | } |
| 916 | |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 917 | /* The connection was accepted, it must be counted as such */ |
| 918 | if (l->counters) |
| 919 | HA_ATOMIC_UPDATE_MAX(&l->counters->conn_max, next_conn); |
| 920 | |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 921 | if (p) |
| 922 | HA_ATOMIC_UPDATE_MAX(&p->fe_counters.conn_max, next_feconn); |
| 923 | |
| 924 | proxy_inc_fe_conn_ctr(l, p); |
| 925 | |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 926 | if (!(l->options & LI_O_UNLIMITED)) { |
| 927 | count = update_freq_ctr(&global.conn_per_sec, 1); |
| 928 | HA_ATOMIC_UPDATE_MAX(&global.cps_max, count); |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 929 | } |
| 930 | |
Willy Tarreau | 64a9c05 | 2019-04-12 15:27:17 +0200 | [diff] [blame] | 931 | _HA_ATOMIC_ADD(&activity[tid].accepted, 1); |
| 932 | |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 933 | if (unlikely(cfd >= global.maxsock)) { |
| 934 | send_log(p, LOG_EMERG, |
| 935 | "Proxy %s reached the configured maximum connection limit. Please check the global 'maxconn' value.\n", |
| 936 | p->id); |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 937 | conn_free(cli_conn); |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 938 | close(cfd); |
Willy Tarreau | 0591bf7 | 2019-12-10 12:01:21 +0100 | [diff] [blame] | 939 | expire = tick_add(now_ms, 1000); /* try again in 1 second */ |
| 940 | goto limit_global; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 941 | } |
| 942 | |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 943 | /* past this point, l->accept() will automatically decrement |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 944 | * l->nbconn, feconn and actconn once done. Setting next_*conn=0 |
| 945 | * allows the error path not to rollback on nbconn. It's more |
| 946 | * convenient than duplicating all exit labels. |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 947 | */ |
| 948 | next_conn = 0; |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 949 | next_feconn = 0; |
| 950 | next_actconn = 0; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 951 | |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 952 | |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 953 | #if defined(USE_THREAD) |
Willy Tarreau | 818a92e | 2020-09-03 07:50:19 +0200 | [diff] [blame] | 954 | mask = thread_mask(l->rx.settings->bind_thread) & all_threads_mask; |
Willy Tarreau | a7da5e8 | 2020-03-12 17:33:29 +0100 | [diff] [blame] | 955 | if (atleast2(mask) && (global.tune.options & GTUNE_LISTENER_MQ) && !stopping) { |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 956 | struct accept_queue_ring *ring; |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 957 | unsigned int t, t0, t1, t2; |
Willy Tarreau | fc630bd | 2019-03-04 19:57:34 +0100 | [diff] [blame] | 958 | |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 959 | /* The principle is that we have two running indexes, |
| 960 | * each visiting in turn all threads bound to this |
| 961 | * listener. The connection will be assigned to the one |
| 962 | * with the least connections, and the other one will |
| 963 | * be updated. This provides a good fairness on short |
Willy Tarreau | fc630bd | 2019-03-04 19:57:34 +0100 | [diff] [blame] | 964 | * connections (round robin) and on long ones (conn |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 965 | * count), without ever missing any idle thread. |
Willy Tarreau | fc630bd | 2019-03-04 19:57:34 +0100 | [diff] [blame] | 966 | */ |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 967 | |
| 968 | /* keep a copy for the final update. thr_idx is composite |
| 969 | * and made of (t2<<16) + t1. |
| 970 | */ |
Willy Tarreau | 0cf3317 | 2019-03-06 15:26:33 +0100 | [diff] [blame] | 971 | t0 = l->thr_idx; |
Willy Tarreau | fc630bd | 2019-03-04 19:57:34 +0100 | [diff] [blame] | 972 | do { |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 973 | unsigned long m1, m2; |
| 974 | int q1, q2; |
| 975 | |
| 976 | t2 = t1 = t0; |
| 977 | t2 >>= 16; |
| 978 | t1 &= 0xFFFF; |
| 979 | |
| 980 | /* t1 walks low to high bits ; |
| 981 | * t2 walks high to low. |
| 982 | */ |
| 983 | m1 = mask >> t1; |
| 984 | m2 = mask & (t2 ? nbits(t2 + 1) : ~0UL); |
| 985 | |
Willy Tarreau | 85d0424 | 2019-04-16 18:09:13 +0200 | [diff] [blame] | 986 | if (unlikely(!(m1 & 1))) { |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 987 | m1 &= ~1UL; |
| 988 | if (!m1) { |
| 989 | m1 = mask; |
| 990 | t1 = 0; |
| 991 | } |
| 992 | t1 += my_ffsl(m1) - 1; |
| 993 | } |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 994 | |
Willy Tarreau | 85d0424 | 2019-04-16 18:09:13 +0200 | [diff] [blame] | 995 | if (unlikely(!(m2 & (1UL << t2)) || t1 == t2)) { |
| 996 | /* highest bit not set */ |
| 997 | if (!m2) |
| 998 | m2 = mask; |
| 999 | |
| 1000 | t2 = my_flsl(m2) - 1; |
| 1001 | } |
| 1002 | |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 1003 | /* now we have two distinct thread IDs belonging to the mask */ |
| 1004 | q1 = accept_queue_rings[t1].tail - accept_queue_rings[t1].head + ACCEPT_QUEUE_SIZE; |
| 1005 | if (q1 >= ACCEPT_QUEUE_SIZE) |
| 1006 | q1 -= ACCEPT_QUEUE_SIZE; |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 1007 | |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 1008 | q2 = accept_queue_rings[t2].tail - accept_queue_rings[t2].head + ACCEPT_QUEUE_SIZE; |
| 1009 | if (q2 >= ACCEPT_QUEUE_SIZE) |
| 1010 | q2 -= ACCEPT_QUEUE_SIZE; |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 1011 | |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 1012 | /* we have 3 possibilities now : |
| 1013 | * q1 < q2 : t1 is less loaded than t2, so we pick it |
| 1014 | * and update t2 (since t1 might still be |
| 1015 | * lower than another thread) |
| 1016 | * q1 > q2 : t2 is less loaded than t1, so we pick it |
| 1017 | * and update t1 (since t2 might still be |
| 1018 | * lower than another thread) |
| 1019 | * q1 = q2 : both are equally loaded, thus we pick t1 |
| 1020 | * and update t1 as it will become more loaded |
| 1021 | * than t2. |
| 1022 | */ |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 1023 | |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 1024 | q1 += l->thr_conn[t1]; |
| 1025 | q2 += l->thr_conn[t2]; |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 1026 | |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 1027 | if (q1 - q2 < 0) { |
| 1028 | t = t1; |
| 1029 | t2 = t2 ? t2 - 1 : LONGBITS - 1; |
| 1030 | } |
| 1031 | else if (q1 - q2 > 0) { |
| 1032 | t = t2; |
| 1033 | t1++; |
| 1034 | if (t1 >= LONGBITS) |
| 1035 | t1 = 0; |
| 1036 | } |
| 1037 | else { |
| 1038 | t = t1; |
| 1039 | t1++; |
| 1040 | if (t1 >= LONGBITS) |
| 1041 | t1 = 0; |
| 1042 | } |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 1043 | |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 1044 | /* new value for thr_idx */ |
| 1045 | t1 += (t2 << 16); |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 1046 | } while (unlikely(!_HA_ATOMIC_CAS(&l->thr_idx, &t0, t1))); |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 1047 | |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 1048 | /* We successfully selected the best thread "t" for this |
| 1049 | * connection. We use deferred accepts even if it's the |
| 1050 | * local thread because tests show that it's the best |
| 1051 | * performing model, likely due to better cache locality |
| 1052 | * when processing this loop. |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 1053 | */ |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 1054 | ring = &accept_queue_rings[t]; |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 1055 | if (accept_queue_push_mp(ring, cli_conn)) { |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 1056 | _HA_ATOMIC_ADD(&activity[t].accq_pushed, 1); |
Willy Tarreau | 2bd65a7 | 2019-09-24 06:55:18 +0200 | [diff] [blame] | 1057 | tasklet_wakeup(ring->tasklet); |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 1058 | continue; |
| 1059 | } |
| 1060 | /* If the ring is full we do a synchronous accept on |
| 1061 | * the local thread here. |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 1062 | */ |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 1063 | _HA_ATOMIC_ADD(&activity[t].accq_full, 1); |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 1064 | } |
| 1065 | #endif // USE_THREAD |
| 1066 | |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 1067 | _HA_ATOMIC_ADD(&l->thr_conn[tid], 1); |
Willy Tarreau | 83efc32 | 2020-10-14 17:37:17 +0200 | [diff] [blame] | 1068 | ret = l->accept(cli_conn); |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 1069 | if (unlikely(ret <= 0)) { |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 1070 | /* The connection was closed by stream_accept(). Either |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 1071 | * we just have to ignore it (ret == 0) or it's a critical |
| 1072 | * error due to a resource shortage, and we must stop the |
| 1073 | * listener (ret < 0). |
| 1074 | */ |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 1075 | if (ret == 0) /* successful termination */ |
| 1076 | continue; |
| 1077 | |
Willy Tarreau | bb66030 | 2014-05-07 19:47:02 +0200 | [diff] [blame] | 1078 | goto transient_error; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 1079 | } |
| 1080 | |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 1081 | /* increase the per-process number of cumulated sessions, this |
| 1082 | * may only be done once l->accept() has accepted the connection. |
| 1083 | */ |
Willy Tarreau | 93e7c00 | 2013-10-07 18:51:07 +0200 | [diff] [blame] | 1084 | if (!(l->options & LI_O_UNLIMITED)) { |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 1085 | count = update_freq_ctr(&global.sess_per_sec, 1); |
| 1086 | HA_ATOMIC_UPDATE_MAX(&global.sps_max, count); |
Willy Tarreau | 93e7c00 | 2013-10-07 18:51:07 +0200 | [diff] [blame] | 1087 | } |
Willy Tarreau | e43d532 | 2013-10-07 20:01:52 +0200 | [diff] [blame] | 1088 | #ifdef USE_OPENSSL |
| 1089 | if (!(l->options & LI_O_UNLIMITED) && l->bind_conf && l->bind_conf->is_ssl) { |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 1090 | count = update_freq_ctr(&global.ssl_per_sec, 1); |
| 1091 | HA_ATOMIC_UPDATE_MAX(&global.ssl_max, count); |
Willy Tarreau | e43d532 | 2013-10-07 20:01:52 +0200 | [diff] [blame] | 1092 | } |
| 1093 | #endif |
Willy Tarreau | 93e7c00 | 2013-10-07 18:51:07 +0200 | [diff] [blame] | 1094 | |
Willy Tarreau | 8d2c98b | 2020-05-01 09:51:11 +0200 | [diff] [blame] | 1095 | ti->flags &= ~TI_FL_STUCK; // this thread is still running |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 1096 | } /* end of for (max_accept--) */ |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 1097 | |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 1098 | end: |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 1099 | if (next_conn) |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 1100 | _HA_ATOMIC_SUB(&l->nbconn, 1); |
Willy Tarreau | 741b4d6 | 2019-02-25 15:02:04 +0100 | [diff] [blame] | 1101 | |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 1102 | if (p && next_feconn) |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 1103 | _HA_ATOMIC_SUB(&p->feconn, 1); |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 1104 | |
| 1105 | if (next_actconn) |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 1106 | _HA_ATOMIC_SUB(&actconn, 1); |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 1107 | |
Willy Tarreau | a8cf66b | 2019-02-27 16:49:00 +0100 | [diff] [blame] | 1108 | if ((l->state == LI_FULL && (!l->maxconn || l->nbconn < l->maxconn)) || |
Willy Tarreau | cdcba11 | 2019-12-11 15:06:30 +0100 | [diff] [blame] | 1109 | (l->state == LI_LIMITED && |
| 1110 | ((!p || p->feconn < p->maxconn) && (actconn < global.maxconn) && |
| 1111 | (!tick_isset(global_listener_queue_task->expire) || |
| 1112 | tick_is_expired(global_listener_queue_task->expire, now_ms))))) { |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 1113 | /* at least one thread has to this when quitting */ |
| 1114 | resume_listener(l); |
| 1115 | |
| 1116 | /* Dequeues all of the listeners waiting for a resource */ |
Willy Tarreau | 241797a | 2019-12-10 14:10:52 +0100 | [diff] [blame] | 1117 | dequeue_all_listeners(); |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 1118 | |
Olivier Houchard | 859dc80 | 2019-08-08 15:47:21 +0200 | [diff] [blame] | 1119 | if (p && !MT_LIST_ISEMPTY(&p->listener_queue) && |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 1120 | (!p->fe_sps_lim || freq_ctr_remain(&p->fe_sess_per_sec, p->fe_sps_lim, 0) > 0)) |
Willy Tarreau | 241797a | 2019-12-10 14:10:52 +0100 | [diff] [blame] | 1121 | dequeue_proxy_listeners(p); |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 1122 | } |
Willy Tarreau | 4c044e2 | 2019-12-05 07:40:32 +0100 | [diff] [blame] | 1123 | |
Willy Tarreau | 9207993 | 2019-12-10 09:30:05 +0100 | [diff] [blame] | 1124 | /* Now it's getting tricky. The listener was supposed to be in LI_READY |
| 1125 | * state but in the mean time we might have changed it to LI_FULL or |
| 1126 | * LI_LIMITED, and another thread might also have turned it to |
| 1127 | * LI_PAUSED, LI_LISTEN or even LI_INI when stopping a proxy. We must |
| 1128 | * be certain to keep the FD enabled when in the READY state but we |
| 1129 | * must also stop it for other states that we might have switched to |
| 1130 | * while others re-enabled polling. |
| 1131 | */ |
| 1132 | HA_SPIN_LOCK(LISTENER_LOCK, &l->lock); |
| 1133 | if (l->state == LI_READY) { |
| 1134 | if (max_accept > 0) |
| 1135 | fd_cant_recv(fd); |
Willy Tarreau | 9207993 | 2019-12-10 09:30:05 +0100 | [diff] [blame] | 1136 | } else if (l->state > LI_ASSIGNED) { |
Willy Tarreau | 38ba647 | 2020-08-27 08:16:52 +0200 | [diff] [blame] | 1137 | fd_stop_recv(l->rx.fd); |
Willy Tarreau | 9207993 | 2019-12-10 09:30:05 +0100 | [diff] [blame] | 1138 | } |
| 1139 | HA_SPIN_UNLOCK(LISTENER_LOCK, &l->lock); |
Willy Tarreau | 0591bf7 | 2019-12-10 12:01:21 +0100 | [diff] [blame] | 1140 | return; |
| 1141 | |
| 1142 | transient_error: |
| 1143 | /* pause the listener for up to 100 ms */ |
| 1144 | expire = tick_add(now_ms, 100); |
| 1145 | |
Willy Tarreau | 258b351 | 2020-10-13 17:46:05 +0200 | [diff] [blame] | 1146 | /* This may be a shared socket that was paused by another process. |
| 1147 | * Let's put it to pause in this case. |
| 1148 | */ |
| 1149 | if (l->rx.proto && l->rx.proto->rx_listening(&l->rx) == 0) { |
| 1150 | pause_listener(l); |
| 1151 | goto end; |
| 1152 | } |
| 1153 | |
Willy Tarreau | 0591bf7 | 2019-12-10 12:01:21 +0100 | [diff] [blame] | 1154 | limit_global: |
| 1155 | /* (re-)queue the listener to the global queue and set it to expire no |
| 1156 | * later than <expire> ahead. The listener turns to LI_LIMITED. |
| 1157 | */ |
| 1158 | limit_listener(l, &global_listener_queue); |
| 1159 | task_schedule(global_listener_queue_task, expire); |
| 1160 | goto end; |
| 1161 | |
| 1162 | limit_proxy: |
| 1163 | /* (re-)queue the listener to the proxy's queue and set it to expire no |
| 1164 | * later than <expire> ahead. The listener turns to LI_LIMITED. |
| 1165 | */ |
| 1166 | limit_listener(l, &p->listener_queue); |
Willy Tarreau | eeea808 | 2020-01-08 19:15:07 +0100 | [diff] [blame] | 1167 | if (p->task && tick_isset(expire)) |
| 1168 | task_schedule(p->task, expire); |
Willy Tarreau | 0591bf7 | 2019-12-10 12:01:21 +0100 | [diff] [blame] | 1169 | goto end; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 1170 | } |
| 1171 | |
Willy Tarreau | 05f5047 | 2017-09-15 09:19:58 +0200 | [diff] [blame] | 1172 | /* Notify the listener that a connection initiated from it was released. This |
| 1173 | * is used to keep the connection count consistent and to possibly re-open |
| 1174 | * listening when it was limited. |
| 1175 | */ |
| 1176 | void listener_release(struct listener *l) |
| 1177 | { |
| 1178 | struct proxy *fe = l->bind_conf->frontend; |
| 1179 | |
| 1180 | if (!(l->options & LI_O_UNLIMITED)) |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 1181 | _HA_ATOMIC_SUB(&actconn, 1); |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 1182 | if (fe) |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 1183 | _HA_ATOMIC_SUB(&fe->feconn, 1); |
| 1184 | _HA_ATOMIC_SUB(&l->nbconn, 1); |
| 1185 | _HA_ATOMIC_SUB(&l->thr_conn[tid], 1); |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 1186 | |
| 1187 | if (l->state == LI_FULL || l->state == LI_LIMITED) |
Willy Tarreau | 05f5047 | 2017-09-15 09:19:58 +0200 | [diff] [blame] | 1188 | resume_listener(l); |
| 1189 | |
| 1190 | /* Dequeues all of the listeners waiting for a resource */ |
Willy Tarreau | 241797a | 2019-12-10 14:10:52 +0100 | [diff] [blame] | 1191 | dequeue_all_listeners(); |
Willy Tarreau | 05f5047 | 2017-09-15 09:19:58 +0200 | [diff] [blame] | 1192 | |
Olivier Houchard | 859dc80 | 2019-08-08 15:47:21 +0200 | [diff] [blame] | 1193 | if (!MT_LIST_ISEMPTY(&fe->listener_queue) && |
Willy Tarreau | 05f5047 | 2017-09-15 09:19:58 +0200 | [diff] [blame] | 1194 | (!fe->fe_sps_lim || freq_ctr_remain(&fe->fe_sess_per_sec, fe->fe_sps_lim, 0) > 0)) |
Willy Tarreau | 241797a | 2019-12-10 14:10:52 +0100 | [diff] [blame] | 1195 | dequeue_proxy_listeners(fe); |
Willy Tarreau | 05f5047 | 2017-09-15 09:19:58 +0200 | [diff] [blame] | 1196 | } |
| 1197 | |
Willy Tarreau | f2cb169 | 2019-07-11 10:08:31 +0200 | [diff] [blame] | 1198 | /* Initializes the listener queues. Returns 0 on success, otherwise ERR_* flags */ |
| 1199 | static int listener_queue_init() |
| 1200 | { |
Willy Tarreau | a1d97f8 | 2019-12-10 11:18:41 +0100 | [diff] [blame] | 1201 | global_listener_queue_task = task_new(MAX_THREADS_MASK); |
| 1202 | if (!global_listener_queue_task) { |
| 1203 | ha_alert("Out of memory when initializing global listener queue\n"); |
| 1204 | return ERR_FATAL|ERR_ABORT; |
| 1205 | } |
| 1206 | /* very simple initialization, users will queue the task if needed */ |
| 1207 | global_listener_queue_task->context = NULL; /* not even a context! */ |
| 1208 | global_listener_queue_task->process = manage_global_listener_queue; |
| 1209 | |
Willy Tarreau | f2cb169 | 2019-07-11 10:08:31 +0200 | [diff] [blame] | 1210 | return 0; |
| 1211 | } |
| 1212 | |
| 1213 | static void listener_queue_deinit() |
| 1214 | { |
Willy Tarreau | a1d97f8 | 2019-12-10 11:18:41 +0100 | [diff] [blame] | 1215 | task_destroy(global_listener_queue_task); |
| 1216 | global_listener_queue_task = NULL; |
Willy Tarreau | f2cb169 | 2019-07-11 10:08:31 +0200 | [diff] [blame] | 1217 | } |
| 1218 | |
| 1219 | REGISTER_CONFIG_POSTPARSER("multi-threaded listener queue", listener_queue_init); |
| 1220 | REGISTER_POST_DEINIT(listener_queue_deinit); |
| 1221 | |
Willy Tarreau | a1d97f8 | 2019-12-10 11:18:41 +0100 | [diff] [blame] | 1222 | |
| 1223 | /* This is the global management task for listeners. It enables listeners waiting |
| 1224 | * for global resources when there are enough free resource, or at least once in |
| 1225 | * a while. It is designed to be called as a task. |
| 1226 | */ |
| 1227 | static struct task *manage_global_listener_queue(struct task *t, void *context, unsigned short state) |
| 1228 | { |
| 1229 | /* If there are still too many concurrent connections, let's wait for |
| 1230 | * some of them to go away. We don't need to re-arm the timer because |
| 1231 | * each of them will scan the queue anyway. |
| 1232 | */ |
| 1233 | if (unlikely(actconn >= global.maxconn)) |
| 1234 | goto out; |
| 1235 | |
| 1236 | /* We should periodically try to enable listeners waiting for a global |
| 1237 | * resource here, because it is possible, though very unlikely, that |
| 1238 | * they have been blocked by a temporary lack of global resource such |
| 1239 | * as a file descriptor or memory and that the temporary condition has |
| 1240 | * disappeared. |
| 1241 | */ |
| 1242 | dequeue_all_listeners(); |
| 1243 | |
| 1244 | out: |
| 1245 | t->expire = TICK_ETERNITY; |
| 1246 | task_queue(t); |
| 1247 | return t; |
| 1248 | } |
| 1249 | |
Willy Tarreau | 2698266 | 2012-09-12 23:17:10 +0200 | [diff] [blame] | 1250 | /* |
| 1251 | * Registers the bind keyword list <kwl> as a list of valid keywords for next |
| 1252 | * parsing sessions. |
| 1253 | */ |
| 1254 | void bind_register_keywords(struct bind_kw_list *kwl) |
| 1255 | { |
| 1256 | LIST_ADDQ(&bind_keywords.list, &kwl->list); |
| 1257 | } |
| 1258 | |
| 1259 | /* Return a pointer to the bind keyword <kw>, or NULL if not found. If the |
| 1260 | * keyword is found with a NULL ->parse() function, then an attempt is made to |
| 1261 | * find one with a valid ->parse() function. This way it is possible to declare |
| 1262 | * platform-dependant, known keywords as NULL, then only declare them as valid |
| 1263 | * if some options are met. Note that if the requested keyword contains an |
| 1264 | * opening parenthesis, everything from this point is ignored. |
| 1265 | */ |
| 1266 | struct bind_kw *bind_find_kw(const char *kw) |
| 1267 | { |
| 1268 | int index; |
| 1269 | const char *kwend; |
| 1270 | struct bind_kw_list *kwl; |
| 1271 | struct bind_kw *ret = NULL; |
| 1272 | |
| 1273 | kwend = strchr(kw, '('); |
| 1274 | if (!kwend) |
| 1275 | kwend = kw + strlen(kw); |
| 1276 | |
| 1277 | list_for_each_entry(kwl, &bind_keywords.list, list) { |
| 1278 | for (index = 0; kwl->kw[index].kw != NULL; index++) { |
| 1279 | if ((strncmp(kwl->kw[index].kw, kw, kwend - kw) == 0) && |
| 1280 | kwl->kw[index].kw[kwend-kw] == 0) { |
| 1281 | if (kwl->kw[index].parse) |
| 1282 | return &kwl->kw[index]; /* found it !*/ |
| 1283 | else |
| 1284 | ret = &kwl->kw[index]; /* may be OK */ |
| 1285 | } |
| 1286 | } |
| 1287 | } |
| 1288 | return ret; |
| 1289 | } |
| 1290 | |
Willy Tarreau | 8638f48 | 2012-09-18 18:01:17 +0200 | [diff] [blame] | 1291 | /* Dumps all registered "bind" keywords to the <out> string pointer. The |
| 1292 | * unsupported keywords are only dumped if their supported form was not |
| 1293 | * found. |
| 1294 | */ |
| 1295 | void bind_dump_kws(char **out) |
| 1296 | { |
| 1297 | struct bind_kw_list *kwl; |
| 1298 | int index; |
| 1299 | |
Christopher Faulet | 784063e | 2020-05-18 12:14:18 +0200 | [diff] [blame] | 1300 | if (!out) |
| 1301 | return; |
| 1302 | |
Willy Tarreau | 8638f48 | 2012-09-18 18:01:17 +0200 | [diff] [blame] | 1303 | *out = NULL; |
| 1304 | list_for_each_entry(kwl, &bind_keywords.list, list) { |
| 1305 | for (index = 0; kwl->kw[index].kw != NULL; index++) { |
| 1306 | if (kwl->kw[index].parse || |
| 1307 | bind_find_kw(kwl->kw[index].kw) == &kwl->kw[index]) { |
Willy Tarreau | 51fb765 | 2012-09-18 18:24:39 +0200 | [diff] [blame] | 1308 | memprintf(out, "%s[%4s] %s%s%s\n", *out ? *out : "", |
| 1309 | kwl->scope, |
Willy Tarreau | 8638f48 | 2012-09-18 18:01:17 +0200 | [diff] [blame] | 1310 | kwl->kw[index].kw, |
Willy Tarreau | 51fb765 | 2012-09-18 18:24:39 +0200 | [diff] [blame] | 1311 | kwl->kw[index].skip ? " <arg>" : "", |
| 1312 | kwl->kw[index].parse ? "" : " (not supported)"); |
Willy Tarreau | 8638f48 | 2012-09-18 18:01:17 +0200 | [diff] [blame] | 1313 | } |
| 1314 | } |
| 1315 | } |
| 1316 | } |
| 1317 | |
Willy Tarreau | 645513a | 2010-05-24 20:55:15 +0200 | [diff] [blame] | 1318 | /************************************************************************/ |
Willy Tarreau | 0ccb744 | 2013-01-07 22:54:17 +0100 | [diff] [blame] | 1319 | /* All supported sample and ACL keywords must be declared here. */ |
Willy Tarreau | 645513a | 2010-05-24 20:55:15 +0200 | [diff] [blame] | 1320 | /************************************************************************/ |
| 1321 | |
Willy Tarreau | a5e3756 | 2011-12-16 17:06:15 +0100 | [diff] [blame] | 1322 | /* set temp integer to the number of connexions to the same listening socket */ |
Willy Tarreau | 645513a | 2010-05-24 20:55:15 +0200 | [diff] [blame] | 1323 | static int |
Thierry FOURNIER | 0786d05 | 2015-05-11 15:42:45 +0200 | [diff] [blame] | 1324 | smp_fetch_dconn(const struct arg *args, struct sample *smp, const char *kw, void *private) |
Willy Tarreau | 645513a | 2010-05-24 20:55:15 +0200 | [diff] [blame] | 1325 | { |
Thierry FOURNIER | 8c542ca | 2015-08-19 09:00:18 +0200 | [diff] [blame] | 1326 | smp->data.type = SMP_T_SINT; |
Thierry FOURNIER | 136f9d3 | 2015-08-19 09:07:19 +0200 | [diff] [blame] | 1327 | smp->data.u.sint = smp->sess->listener->nbconn; |
Willy Tarreau | 645513a | 2010-05-24 20:55:15 +0200 | [diff] [blame] | 1328 | return 1; |
| 1329 | } |
| 1330 | |
Willy Tarreau | a5e3756 | 2011-12-16 17:06:15 +0100 | [diff] [blame] | 1331 | /* set temp integer to the id of the socket (listener) */ |
Willy Tarreau | 645513a | 2010-05-24 20:55:15 +0200 | [diff] [blame] | 1332 | static int |
Thierry FOURNIER | 0786d05 | 2015-05-11 15:42:45 +0200 | [diff] [blame] | 1333 | smp_fetch_so_id(const struct arg *args, struct sample *smp, const char *kw, void *private) |
Willy Tarreau | 3740635 | 2012-04-23 16:16:37 +0200 | [diff] [blame] | 1334 | { |
Thierry FOURNIER | 8c542ca | 2015-08-19 09:00:18 +0200 | [diff] [blame] | 1335 | smp->data.type = SMP_T_SINT; |
Thierry FOURNIER | 136f9d3 | 2015-08-19 09:07:19 +0200 | [diff] [blame] | 1336 | smp->data.u.sint = smp->sess->listener->luid; |
Willy Tarreau | 645513a | 2010-05-24 20:55:15 +0200 | [diff] [blame] | 1337 | return 1; |
| 1338 | } |
Jerome Magnin | eb421b2 | 2020-03-27 22:08:40 +0100 | [diff] [blame] | 1339 | static int |
| 1340 | smp_fetch_so_name(const struct arg *args, struct sample *smp, const char *kw, void *private) |
| 1341 | { |
| 1342 | smp->data.u.str.area = smp->sess->listener->name; |
| 1343 | if (!smp->data.u.str.area) |
| 1344 | return 0; |
| 1345 | |
| 1346 | smp->data.type = SMP_T_STR; |
| 1347 | smp->flags = SMP_F_CONST; |
| 1348 | smp->data.u.str.data = strlen(smp->data.u.str.area); |
| 1349 | return 1; |
| 1350 | } |
Willy Tarreau | 645513a | 2010-05-24 20:55:15 +0200 | [diff] [blame] | 1351 | |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1352 | /* parse the "accept-proxy" bind keyword */ |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1353 | static int bind_parse_accept_proxy(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err) |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1354 | { |
| 1355 | struct listener *l; |
| 1356 | |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1357 | list_for_each_entry(l, &conf->listeners, by_bind) |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1358 | l->options |= LI_O_ACC_PROXY; |
| 1359 | |
| 1360 | return 0; |
| 1361 | } |
| 1362 | |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 1363 | /* parse the "accept-netscaler-cip" bind keyword */ |
| 1364 | static int bind_parse_accept_netscaler_cip(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err) |
| 1365 | { |
| 1366 | struct listener *l; |
| 1367 | uint32_t val; |
| 1368 | |
| 1369 | if (!*args[cur_arg + 1]) { |
| 1370 | memprintf(err, "'%s' : missing value", args[cur_arg]); |
| 1371 | return ERR_ALERT | ERR_FATAL; |
| 1372 | } |
| 1373 | |
| 1374 | val = atol(args[cur_arg + 1]); |
| 1375 | if (val <= 0) { |
Willy Tarreau | e2711c7 | 2019-02-27 15:39:41 +0100 | [diff] [blame] | 1376 | memprintf(err, "'%s' : invalid value %d, must be >= 0", args[cur_arg], val); |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 1377 | return ERR_ALERT | ERR_FATAL; |
| 1378 | } |
| 1379 | |
| 1380 | list_for_each_entry(l, &conf->listeners, by_bind) { |
| 1381 | l->options |= LI_O_ACC_CIP; |
| 1382 | conf->ns_cip_magic = val; |
| 1383 | } |
| 1384 | |
| 1385 | return 0; |
| 1386 | } |
| 1387 | |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1388 | /* parse the "backlog" bind keyword */ |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1389 | static int bind_parse_backlog(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err) |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1390 | { |
| 1391 | struct listener *l; |
| 1392 | int val; |
| 1393 | |
| 1394 | if (!*args[cur_arg + 1]) { |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1395 | memprintf(err, "'%s' : missing value", args[cur_arg]); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1396 | return ERR_ALERT | ERR_FATAL; |
| 1397 | } |
| 1398 | |
| 1399 | val = atol(args[cur_arg + 1]); |
Willy Tarreau | e2711c7 | 2019-02-27 15:39:41 +0100 | [diff] [blame] | 1400 | if (val < 0) { |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1401 | memprintf(err, "'%s' : invalid value %d, must be > 0", args[cur_arg], val); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1402 | return ERR_ALERT | ERR_FATAL; |
| 1403 | } |
| 1404 | |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1405 | list_for_each_entry(l, &conf->listeners, by_bind) |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1406 | l->backlog = val; |
| 1407 | |
| 1408 | return 0; |
| 1409 | } |
| 1410 | |
| 1411 | /* parse the "id" bind keyword */ |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1412 | static int bind_parse_id(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err) |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1413 | { |
| 1414 | struct eb32_node *node; |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1415 | struct listener *l, *new; |
Thierry Fournier | e7fe8eb | 2016-02-26 08:45:58 +0100 | [diff] [blame] | 1416 | char *error; |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1417 | |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1418 | if (conf->listeners.n != conf->listeners.p) { |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1419 | memprintf(err, "'%s' can only be used with a single socket", args[cur_arg]); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1420 | return ERR_ALERT | ERR_FATAL; |
| 1421 | } |
| 1422 | |
| 1423 | if (!*args[cur_arg + 1]) { |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1424 | memprintf(err, "'%s' : expects an integer argument", args[cur_arg]); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1425 | return ERR_ALERT | ERR_FATAL; |
| 1426 | } |
| 1427 | |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1428 | new = LIST_NEXT(&conf->listeners, struct listener *, by_bind); |
Thierry Fournier | e7fe8eb | 2016-02-26 08:45:58 +0100 | [diff] [blame] | 1429 | new->luid = strtol(args[cur_arg + 1], &error, 10); |
| 1430 | if (*error != '\0') { |
| 1431 | memprintf(err, "'%s' : expects an integer argument, found '%s'", args[cur_arg], args[cur_arg + 1]); |
| 1432 | return ERR_ALERT | ERR_FATAL; |
| 1433 | } |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1434 | new->conf.id.key = new->luid; |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1435 | |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1436 | if (new->luid <= 0) { |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1437 | memprintf(err, "'%s' : custom id has to be > 0", args[cur_arg]); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1438 | return ERR_ALERT | ERR_FATAL; |
| 1439 | } |
| 1440 | |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1441 | node = eb32_lookup(&px->conf.used_listener_id, new->luid); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1442 | if (node) { |
| 1443 | l = container_of(node, struct listener, conf.id); |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1444 | memprintf(err, "'%s' : custom id %d already used at %s:%d ('bind %s')", |
| 1445 | args[cur_arg], l->luid, l->bind_conf->file, l->bind_conf->line, |
| 1446 | l->bind_conf->arg); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1447 | return ERR_ALERT | ERR_FATAL; |
| 1448 | } |
| 1449 | |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1450 | eb32_insert(&px->conf.used_listener_id, &new->conf.id); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1451 | return 0; |
| 1452 | } |
| 1453 | |
| 1454 | /* parse the "maxconn" bind keyword */ |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1455 | static int bind_parse_maxconn(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err) |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1456 | { |
| 1457 | struct listener *l; |
| 1458 | int val; |
| 1459 | |
| 1460 | if (!*args[cur_arg + 1]) { |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1461 | memprintf(err, "'%s' : missing value", args[cur_arg]); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1462 | return ERR_ALERT | ERR_FATAL; |
| 1463 | } |
| 1464 | |
| 1465 | val = atol(args[cur_arg + 1]); |
Willy Tarreau | a8cf66b | 2019-02-27 16:49:00 +0100 | [diff] [blame] | 1466 | if (val < 0) { |
| 1467 | memprintf(err, "'%s' : invalid value %d, must be >= 0", args[cur_arg], val); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1468 | return ERR_ALERT | ERR_FATAL; |
| 1469 | } |
| 1470 | |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1471 | list_for_each_entry(l, &conf->listeners, by_bind) |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1472 | l->maxconn = val; |
| 1473 | |
| 1474 | return 0; |
| 1475 | } |
| 1476 | |
| 1477 | /* parse the "name" bind keyword */ |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1478 | static int bind_parse_name(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err) |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1479 | { |
| 1480 | struct listener *l; |
| 1481 | |
| 1482 | if (!*args[cur_arg + 1]) { |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1483 | memprintf(err, "'%s' : missing name", args[cur_arg]); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1484 | return ERR_ALERT | ERR_FATAL; |
| 1485 | } |
| 1486 | |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1487 | list_for_each_entry(l, &conf->listeners, by_bind) |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1488 | l->name = strdup(args[cur_arg + 1]); |
| 1489 | |
| 1490 | return 0; |
| 1491 | } |
| 1492 | |
| 1493 | /* parse the "nice" bind keyword */ |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1494 | static int bind_parse_nice(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err) |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1495 | { |
| 1496 | struct listener *l; |
| 1497 | int val; |
| 1498 | |
| 1499 | if (!*args[cur_arg + 1]) { |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1500 | memprintf(err, "'%s' : missing value", args[cur_arg]); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1501 | return ERR_ALERT | ERR_FATAL; |
| 1502 | } |
| 1503 | |
| 1504 | val = atol(args[cur_arg + 1]); |
| 1505 | if (val < -1024 || val > 1024) { |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1506 | memprintf(err, "'%s' : invalid value %d, allowed range is -1024..1024", args[cur_arg], val); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1507 | return ERR_ALERT | ERR_FATAL; |
| 1508 | } |
| 1509 | |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1510 | list_for_each_entry(l, &conf->listeners, by_bind) |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1511 | l->nice = val; |
| 1512 | |
| 1513 | return 0; |
| 1514 | } |
| 1515 | |
Willy Tarreau | 6ae1ba6 | 2014-05-07 19:01:58 +0200 | [diff] [blame] | 1516 | /* parse the "process" bind keyword */ |
| 1517 | static int bind_parse_process(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err) |
| 1518 | { |
Christopher Faulet | c644fa9 | 2017-11-23 22:44:11 +0100 | [diff] [blame] | 1519 | char *slash; |
| 1520 | unsigned long proc = 0, thread = 0; |
Willy Tarreau | 6ae1ba6 | 2014-05-07 19:01:58 +0200 | [diff] [blame] | 1521 | |
Christopher Faulet | c644fa9 | 2017-11-23 22:44:11 +0100 | [diff] [blame] | 1522 | if ((slash = strchr(args[cur_arg + 1], '/')) != NULL) |
| 1523 | *slash = 0; |
| 1524 | |
Willy Tarreau | ff9c914 | 2019-02-07 10:39:36 +0100 | [diff] [blame] | 1525 | if (parse_process_number(args[cur_arg + 1], &proc, MAX_PROCS, NULL, err)) { |
Christopher Faulet | f1f0c5f | 2017-11-22 12:06:43 +0100 | [diff] [blame] | 1526 | memprintf(err, "'%s' : %s", args[cur_arg], *err); |
Willy Tarreau | 6ae1ba6 | 2014-05-07 19:01:58 +0200 | [diff] [blame] | 1527 | return ERR_ALERT | ERR_FATAL; |
| 1528 | } |
| 1529 | |
Christopher Faulet | c644fa9 | 2017-11-23 22:44:11 +0100 | [diff] [blame] | 1530 | if (slash) { |
Willy Tarreau | c9a82e4 | 2019-01-26 13:25:14 +0100 | [diff] [blame] | 1531 | if (parse_process_number(slash+1, &thread, MAX_THREADS, NULL, err)) { |
Christopher Faulet | c644fa9 | 2017-11-23 22:44:11 +0100 | [diff] [blame] | 1532 | memprintf(err, "'%s' : %s", args[cur_arg], *err); |
| 1533 | return ERR_ALERT | ERR_FATAL; |
| 1534 | } |
| 1535 | *slash = '/'; |
| 1536 | } |
| 1537 | |
Willy Tarreau | e26993c | 2020-09-03 07:18:55 +0200 | [diff] [blame] | 1538 | conf->settings.bind_proc |= proc; |
| 1539 | conf->settings.bind_thread |= thread; |
Willy Tarreau | 6ae1ba6 | 2014-05-07 19:01:58 +0200 | [diff] [blame] | 1540 | return 0; |
| 1541 | } |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1542 | |
Christopher Faulet | a717b99 | 2018-04-10 14:43:00 +0200 | [diff] [blame] | 1543 | /* parse the "proto" bind keyword */ |
| 1544 | static int bind_parse_proto(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err) |
| 1545 | { |
| 1546 | struct ist proto; |
| 1547 | |
| 1548 | if (!*args[cur_arg + 1]) { |
| 1549 | memprintf(err, "'%s' : missing value", args[cur_arg]); |
| 1550 | return ERR_ALERT | ERR_FATAL; |
| 1551 | } |
| 1552 | |
| 1553 | proto = ist2(args[cur_arg + 1], strlen(args[cur_arg + 1])); |
| 1554 | conf->mux_proto = get_mux_proto(proto); |
| 1555 | if (!conf->mux_proto) { |
| 1556 | memprintf(err, "'%s' : unknown MUX protocol '%s'", args[cur_arg], args[cur_arg+1]); |
| 1557 | return ERR_ALERT | ERR_FATAL; |
| 1558 | } |
Christopher Faulet | a717b99 | 2018-04-10 14:43:00 +0200 | [diff] [blame] | 1559 | return 0; |
| 1560 | } |
| 1561 | |
Willy Tarreau | 7ac908b | 2019-02-27 12:02:18 +0100 | [diff] [blame] | 1562 | /* config parser for global "tune.listener.multi-queue", accepts "on" or "off" */ |
| 1563 | static int cfg_parse_tune_listener_mq(char **args, int section_type, struct proxy *curpx, |
| 1564 | struct proxy *defpx, const char *file, int line, |
| 1565 | char **err) |
| 1566 | { |
| 1567 | if (too_many_args(1, args, err, NULL)) |
| 1568 | return -1; |
| 1569 | |
| 1570 | if (strcmp(args[1], "on") == 0) |
| 1571 | global.tune.options |= GTUNE_LISTENER_MQ; |
| 1572 | else if (strcmp(args[1], "off") == 0) |
| 1573 | global.tune.options &= ~GTUNE_LISTENER_MQ; |
| 1574 | else { |
| 1575 | memprintf(err, "'%s' expects either 'on' or 'off' but got '%s'.", args[0], args[1]); |
| 1576 | return -1; |
| 1577 | } |
| 1578 | return 0; |
| 1579 | } |
| 1580 | |
Willy Tarreau | 61612d4 | 2012-04-19 18:42:05 +0200 | [diff] [blame] | 1581 | /* Note: must not be declared <const> as its list will be overwritten. |
| 1582 | * Please take care of keeping this list alphabetically sorted. |
| 1583 | */ |
Willy Tarreau | dc13c11 | 2013-06-21 23:16:39 +0200 | [diff] [blame] | 1584 | static struct sample_fetch_kw_list smp_kws = {ILH, { |
Thierry FOURNIER | 07ee64e | 2015-07-06 23:43:03 +0200 | [diff] [blame] | 1585 | { "dst_conn", smp_fetch_dconn, 0, NULL, SMP_T_SINT, SMP_USE_FTEND, }, |
| 1586 | { "so_id", smp_fetch_so_id, 0, NULL, SMP_T_SINT, SMP_USE_FTEND, }, |
Jerome Magnin | eb421b2 | 2020-03-27 22:08:40 +0100 | [diff] [blame] | 1587 | { "so_name", smp_fetch_so_name, 0, NULL, SMP_T_STR, SMP_USE_FTEND, }, |
Willy Tarreau | 0ccb744 | 2013-01-07 22:54:17 +0100 | [diff] [blame] | 1588 | { /* END */ }, |
| 1589 | }}; |
| 1590 | |
Willy Tarreau | 0108d90 | 2018-11-25 19:14:37 +0100 | [diff] [blame] | 1591 | INITCALL1(STG_REGISTER, sample_register_fetches, &smp_kws); |
| 1592 | |
Willy Tarreau | 0ccb744 | 2013-01-07 22:54:17 +0100 | [diff] [blame] | 1593 | /* Note: must not be declared <const> as its list will be overwritten. |
| 1594 | * Please take care of keeping this list alphabetically sorted. |
| 1595 | */ |
Willy Tarreau | dc13c11 | 2013-06-21 23:16:39 +0200 | [diff] [blame] | 1596 | static struct acl_kw_list acl_kws = {ILH, { |
Willy Tarreau | 0ccb744 | 2013-01-07 22:54:17 +0100 | [diff] [blame] | 1597 | { /* END */ }, |
Willy Tarreau | 645513a | 2010-05-24 20:55:15 +0200 | [diff] [blame] | 1598 | }}; |
| 1599 | |
Willy Tarreau | 0108d90 | 2018-11-25 19:14:37 +0100 | [diff] [blame] | 1600 | INITCALL1(STG_REGISTER, acl_register_keywords, &acl_kws); |
| 1601 | |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1602 | /* Note: must not be declared <const> as its list will be overwritten. |
| 1603 | * Please take care of keeping this list alphabetically sorted, doing so helps |
| 1604 | * all code contributors. |
| 1605 | * Optional keywords are also declared with a NULL ->parse() function so that |
| 1606 | * the config parser can report an appropriate error when a known keyword was |
| 1607 | * not enabled. |
| 1608 | */ |
Willy Tarreau | 51fb765 | 2012-09-18 18:24:39 +0200 | [diff] [blame] | 1609 | static struct bind_kw_list bind_kws = { "ALL", { }, { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 1610 | { "accept-netscaler-cip", bind_parse_accept_netscaler_cip, 1 }, /* enable NetScaler Client IP insertion protocol */ |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1611 | { "accept-proxy", bind_parse_accept_proxy, 0 }, /* enable PROXY protocol */ |
| 1612 | { "backlog", bind_parse_backlog, 1 }, /* set backlog of listening socket */ |
| 1613 | { "id", bind_parse_id, 1 }, /* set id of listening socket */ |
| 1614 | { "maxconn", bind_parse_maxconn, 1 }, /* set maxconn of listening socket */ |
| 1615 | { "name", bind_parse_name, 1 }, /* set name of listening socket */ |
| 1616 | { "nice", bind_parse_nice, 1 }, /* set nice of listening socket */ |
Willy Tarreau | 6ae1ba6 | 2014-05-07 19:01:58 +0200 | [diff] [blame] | 1617 | { "process", bind_parse_process, 1 }, /* set list of allowed process for this socket */ |
Christopher Faulet | a717b99 | 2018-04-10 14:43:00 +0200 | [diff] [blame] | 1618 | { "proto", bind_parse_proto, 1 }, /* set the proto to use for all incoming connections */ |
Willy Tarreau | 0ccb744 | 2013-01-07 22:54:17 +0100 | [diff] [blame] | 1619 | { /* END */ }, |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1620 | }}; |
| 1621 | |
Willy Tarreau | 0108d90 | 2018-11-25 19:14:37 +0100 | [diff] [blame] | 1622 | INITCALL1(STG_REGISTER, bind_register_keywords, &bind_kws); |
| 1623 | |
Willy Tarreau | 7ac908b | 2019-02-27 12:02:18 +0100 | [diff] [blame] | 1624 | /* config keyword parsers */ |
| 1625 | static struct cfg_kw_list cfg_kws = {ILH, { |
| 1626 | { CFG_GLOBAL, "tune.listener.multi-queue", cfg_parse_tune_listener_mq }, |
| 1627 | { 0, NULL, NULL } |
| 1628 | }}; |
| 1629 | |
| 1630 | INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws); |
| 1631 | |
Willy Tarreau | 645513a | 2010-05-24 20:55:15 +0200 | [diff] [blame] | 1632 | /* |
| 1633 | * Local variables: |
| 1634 | * c-indent-level: 8 |
| 1635 | * c-basic-offset: 8 |
| 1636 | * End: |
| 1637 | */ |