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 |
| 58 | * consumer). Returns the accepted fd or -1 if none was found. The listener is |
| 59 | * placed into *li. The address is copied into *addr for no more than *addr_len |
| 60 | * bytes, and the address length is returned into *addr_len. |
| 61 | */ |
| 62 | int accept_queue_pop_sc(struct accept_queue_ring *ring, struct listener **li, void *addr, int *addr_len) |
| 63 | { |
| 64 | struct accept_queue_entry *e; |
| 65 | unsigned int pos, next; |
| 66 | struct listener *ptr; |
| 67 | int len; |
| 68 | int fd; |
| 69 | |
| 70 | pos = ring->head; |
| 71 | |
| 72 | if (pos == ring->tail) |
| 73 | return -1; |
| 74 | |
| 75 | next = pos + 1; |
| 76 | if (next >= ACCEPT_QUEUE_SIZE) |
| 77 | next = 0; |
| 78 | |
| 79 | e = &ring->entry[pos]; |
| 80 | |
| 81 | /* wait for the producer to update the listener's pointer */ |
| 82 | while (1) { |
| 83 | ptr = e->listener; |
| 84 | __ha_barrier_load(); |
| 85 | if (ptr) |
| 86 | break; |
| 87 | pl_cpu_relax(); |
| 88 | } |
| 89 | |
| 90 | fd = e->fd; |
| 91 | len = e->addr_len; |
| 92 | if (len > *addr_len) |
| 93 | len = *addr_len; |
| 94 | |
| 95 | if (likely(len > 0)) |
| 96 | memcpy(addr, &e->addr, len); |
| 97 | |
| 98 | /* release the entry */ |
| 99 | e->listener = NULL; |
| 100 | |
| 101 | __ha_barrier_store(); |
| 102 | ring->head = next; |
| 103 | |
| 104 | *addr_len = len; |
| 105 | *li = ptr; |
| 106 | |
| 107 | return fd; |
| 108 | } |
| 109 | |
| 110 | |
| 111 | /* tries to push a new accepted connection <fd> into ring <ring> for listener |
| 112 | * <li>, from address <addr> whose length is <addr_len>. Returns non-zero if it |
| 113 | * succeeds, or zero if the ring is full. Supports multiple producers. |
| 114 | */ |
| 115 | int accept_queue_push_mp(struct accept_queue_ring *ring, int fd, |
| 116 | struct listener *li, const void *addr, int addr_len) |
| 117 | { |
| 118 | struct accept_queue_entry *e; |
| 119 | unsigned int pos, next; |
| 120 | |
| 121 | pos = ring->tail; |
| 122 | do { |
| 123 | next = pos + 1; |
| 124 | if (next >= ACCEPT_QUEUE_SIZE) |
| 125 | next = 0; |
| 126 | if (next == ring->head) |
| 127 | return 0; // ring full |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 128 | } while (unlikely(!_HA_ATOMIC_CAS(&ring->tail, &pos, next))); |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 129 | |
| 130 | |
| 131 | e = &ring->entry[pos]; |
| 132 | |
| 133 | if (addr_len > sizeof(e->addr)) |
| 134 | addr_len = sizeof(e->addr); |
| 135 | |
| 136 | if (addr_len) |
| 137 | memcpy(&e->addr, addr, addr_len); |
| 138 | |
| 139 | e->addr_len = addr_len; |
| 140 | e->fd = fd; |
| 141 | |
| 142 | __ha_barrier_store(); |
| 143 | /* now commit the change */ |
| 144 | |
| 145 | e->listener = li; |
| 146 | return 1; |
| 147 | } |
| 148 | |
| 149 | /* proceed with accepting new connections */ |
| 150 | static struct task *accept_queue_process(struct task *t, void *context, unsigned short state) |
| 151 | { |
| 152 | struct accept_queue_ring *ring = context; |
| 153 | struct listener *li; |
| 154 | struct sockaddr_storage addr; |
Christopher Faulet | 102854c | 2019-04-30 12:17:13 +0200 | [diff] [blame] | 155 | unsigned int max_accept; |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 156 | int addr_len; |
| 157 | int ret; |
| 158 | int fd; |
| 159 | |
Christopher Faulet | 102854c | 2019-04-30 12:17:13 +0200 | [diff] [blame] | 160 | /* if global.tune.maxaccept is -1, then max_accept is UINT_MAX. It |
| 161 | * is not really illimited, but it is probably enough. |
| 162 | */ |
| 163 | max_accept = global.tune.maxaccept ? global.tune.maxaccept : 64; |
| 164 | for (; max_accept; max_accept--) { |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 165 | addr_len = sizeof(addr); |
| 166 | fd = accept_queue_pop_sc(ring, &li, &addr, &addr_len); |
| 167 | if (fd < 0) |
| 168 | break; |
| 169 | |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 170 | _HA_ATOMIC_ADD(&li->thr_conn[tid], 1); |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 171 | ret = li->accept(li, fd, &addr); |
| 172 | if (ret <= 0) { |
| 173 | /* connection was terminated by the application */ |
| 174 | continue; |
| 175 | } |
| 176 | |
| 177 | /* increase the per-process number of cumulated sessions, this |
| 178 | * may only be done once l->accept() has accepted the connection. |
| 179 | */ |
| 180 | if (!(li->options & LI_O_UNLIMITED)) { |
| 181 | HA_ATOMIC_UPDATE_MAX(&global.sps_max, |
| 182 | update_freq_ctr(&global.sess_per_sec, 1)); |
| 183 | if (li->bind_conf && li->bind_conf->is_ssl) { |
| 184 | HA_ATOMIC_UPDATE_MAX(&global.ssl_max, |
| 185 | update_freq_ctr(&global.ssl_per_sec, 1)); |
| 186 | } |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | /* ran out of budget ? Let's come here ASAP */ |
Christopher Faulet | 102854c | 2019-04-30 12:17:13 +0200 | [diff] [blame] | 191 | if (!max_accept) |
Willy Tarreau | 2bd65a7 | 2019-09-24 06:55:18 +0200 | [diff] [blame] | 192 | tasklet_wakeup(ring->tasklet); |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 193 | |
Willy Tarreau | 2bd65a7 | 2019-09-24 06:55:18 +0200 | [diff] [blame] | 194 | return NULL; |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | /* Initializes the accept-queues. Returns 0 on success, otherwise ERR_* flags */ |
| 198 | static int accept_queue_init() |
| 199 | { |
Willy Tarreau | 2bd65a7 | 2019-09-24 06:55:18 +0200 | [diff] [blame] | 200 | struct tasklet *t; |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 201 | int i; |
| 202 | |
| 203 | for (i = 0; i < global.nbthread; i++) { |
Willy Tarreau | 2bd65a7 | 2019-09-24 06:55:18 +0200 | [diff] [blame] | 204 | t = tasklet_new(); |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 205 | if (!t) { |
| 206 | ha_alert("Out of memory while initializing accept queue for thread %d\n", i); |
| 207 | return ERR_FATAL|ERR_ABORT; |
| 208 | } |
Willy Tarreau | 2bd65a7 | 2019-09-24 06:55:18 +0200 | [diff] [blame] | 209 | t->tid = i; |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 210 | t->process = accept_queue_process; |
| 211 | t->context = &accept_queue_rings[i]; |
Willy Tarreau | 2bd65a7 | 2019-09-24 06:55:18 +0200 | [diff] [blame] | 212 | accept_queue_rings[i].tasklet = t; |
Willy Tarreau | 1efafce | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 213 | } |
| 214 | return 0; |
| 215 | } |
| 216 | |
| 217 | REGISTER_CONFIG_POSTPARSER("multi-threaded accept queue", accept_queue_init); |
| 218 | |
| 219 | #endif // USE_THREAD |
| 220 | |
Willy Tarreau | efc0eec | 2020-09-24 07:27:06 +0200 | [diff] [blame] | 221 | /* adjust the listener's state and its proxy's listener counters if needed. |
| 222 | * It must be called under the listener's lock, but uses atomic ops to change |
| 223 | * the proxy's counters so that the proxy lock is not needed. |
| 224 | */ |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 225 | void listener_set_state(struct listener *l, enum li_state st) |
| 226 | { |
Willy Tarreau | efc0eec | 2020-09-24 07:27:06 +0200 | [diff] [blame] | 227 | struct proxy *px = l->bind_conf->frontend; |
| 228 | |
| 229 | if (px) { |
| 230 | /* from state */ |
| 231 | switch (l->state) { |
| 232 | case LI_NEW: /* first call */ |
| 233 | _HA_ATOMIC_ADD(&px->li_all, 1); |
| 234 | break; |
| 235 | case LI_INIT: |
| 236 | case LI_ASSIGNED: |
| 237 | break; |
| 238 | case LI_PAUSED: |
| 239 | _HA_ATOMIC_SUB(&px->li_paused, 1); |
| 240 | break; |
| 241 | case LI_LISTEN: |
| 242 | _HA_ATOMIC_SUB(&px->li_bound, 1); |
| 243 | break; |
| 244 | case LI_READY: |
| 245 | case LI_FULL: |
| 246 | case LI_LIMITED: |
| 247 | _HA_ATOMIC_SUB(&px->li_ready, 1); |
| 248 | break; |
| 249 | } |
| 250 | |
| 251 | /* to state */ |
| 252 | switch (st) { |
| 253 | case LI_NEW: |
| 254 | case LI_INIT: |
| 255 | case LI_ASSIGNED: |
| 256 | break; |
| 257 | case LI_PAUSED: |
| 258 | _HA_ATOMIC_ADD(&px->li_paused, 1); |
| 259 | break; |
| 260 | case LI_LISTEN: |
| 261 | _HA_ATOMIC_ADD(&px->li_bound, 1); |
| 262 | break; |
| 263 | case LI_READY: |
| 264 | case LI_FULL: |
| 265 | case LI_LIMITED: |
| 266 | _HA_ATOMIC_ADD(&px->li_ready, 1); |
| 267 | break; |
| 268 | } |
| 269 | } |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 270 | l->state = st; |
| 271 | } |
| 272 | |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 273 | /* This function adds the specified listener's file descriptor to the polling |
| 274 | * 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] | 275 | * 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] | 276 | * also support binding only the relevant processes to their respective |
| 277 | * listeners. We don't do that in debug mode however. |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 278 | */ |
Christopher Faulet | f5b8adc | 2017-06-02 10:00:35 +0200 | [diff] [blame] | 279 | static void enable_listener(struct listener *listener) |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 280 | { |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 281 | HA_SPIN_LOCK(LISTENER_LOCK, &listener->lock); |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 282 | if (listener->state == LI_LISTEN) { |
William Lallemand | 095ba4c | 2017-06-01 17:38:50 +0200 | [diff] [blame] | 283 | if ((global.mode & (MODE_DAEMON | MODE_MWORKER)) && |
Willy Tarreau | 818a92e | 2020-09-03 07:50:19 +0200 | [diff] [blame] | 284 | !(proc_mask(listener->rx.settings->bind_proc) & pid_bit)) { |
Willy Tarreau | ae30253 | 2014-05-07 19:22:24 +0200 | [diff] [blame] | 285 | /* we don't want to enable this listener and don't |
| 286 | * want any fd event to reach it. |
| 287 | */ |
Olivier Houchard | 1fc0516 | 2017-04-06 01:05:05 +0200 | [diff] [blame] | 288 | if (!(global.tune.options & GTUNE_SOCKET_TRANSFER)) |
Christopher Faulet | 510c0d6 | 2018-03-16 10:04:47 +0100 | [diff] [blame] | 289 | do_unbind_listener(listener, 1); |
Olivier Houchard | 1fc0516 | 2017-04-06 01:05:05 +0200 | [diff] [blame] | 290 | else { |
Christopher Faulet | 510c0d6 | 2018-03-16 10:04:47 +0100 | [diff] [blame] | 291 | do_unbind_listener(listener, 0); |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 292 | listener_set_state(listener, LI_LISTEN); |
Olivier Houchard | 1fc0516 | 2017-04-06 01:05:05 +0200 | [diff] [blame] | 293 | } |
Willy Tarreau | ae30253 | 2014-05-07 19:22:24 +0200 | [diff] [blame] | 294 | } |
Willy Tarreau | a8cf66b | 2019-02-27 16:49:00 +0100 | [diff] [blame] | 295 | else if (!listener->maxconn || listener->nbconn < listener->maxconn) { |
Willy Tarreau | 38ba647 | 2020-08-27 08:16:52 +0200 | [diff] [blame] | 296 | fd_want_recv(listener->rx.fd); |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 297 | listener_set_state(listener, LI_READY); |
Willy Tarreau | ae30253 | 2014-05-07 19:22:24 +0200 | [diff] [blame] | 298 | } |
| 299 | else { |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 300 | listener_set_state(listener, LI_FULL); |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 301 | } |
| 302 | } |
William Lallemand | e22f11f | 2018-09-11 10:06:27 +0200 | [diff] [blame] | 303 | /* if this listener is supposed to be only in the master, close it in the workers */ |
| 304 | if ((global.mode & MODE_MWORKER) && |
| 305 | (listener->options & LI_O_MWORKER) && |
| 306 | master == 0) { |
| 307 | do_unbind_listener(listener, 1); |
| 308 | } |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 309 | HA_SPIN_UNLOCK(LISTENER_LOCK, &listener->lock); |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 310 | } |
| 311 | |
| 312 | /* This function removes the specified listener's file descriptor from the |
| 313 | * polling lists if it is in the LI_READY or in the LI_FULL state. The listener |
| 314 | * enters LI_LISTEN. |
| 315 | */ |
Christopher Faulet | f5b8adc | 2017-06-02 10:00:35 +0200 | [diff] [blame] | 316 | static void disable_listener(struct listener *listener) |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 317 | { |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 318 | HA_SPIN_LOCK(LISTENER_LOCK, &listener->lock); |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 319 | if (listener->state < LI_READY) |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 320 | goto end; |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 321 | if (listener->state == LI_READY) |
Willy Tarreau | 38ba647 | 2020-08-27 08:16:52 +0200 | [diff] [blame] | 322 | fd_stop_recv(listener->rx.fd); |
Olivier Houchard | 859dc80 | 2019-08-08 15:47:21 +0200 | [diff] [blame] | 323 | MT_LIST_DEL(&listener->wait_queue); |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 324 | listener_set_state(listener, LI_LISTEN); |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 325 | end: |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 326 | HA_SPIN_UNLOCK(LISTENER_LOCK, &listener->lock); |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 327 | } |
| 328 | |
Willy Tarreau | be58c38 | 2011-07-24 18:28:10 +0200 | [diff] [blame] | 329 | /* This function tries to temporarily disable a listener, depending on the OS |
| 330 | * capabilities. Linux unbinds the listen socket after a SHUT_RD, and ignores |
| 331 | * SHUT_WR. Solaris refuses either shutdown(). OpenBSD ignores SHUT_RD but |
| 332 | * closes upon SHUT_WR and refuses to rebind. So a common validation path |
| 333 | * involves SHUT_WR && listen && SHUT_RD. In case of success, the FD's polling |
| 334 | * is disabled. It normally returns non-zero, unless an error is reported. |
| 335 | */ |
| 336 | int pause_listener(struct listener *l) |
| 337 | { |
Willy Tarreau | 58651b4 | 2020-09-24 16:03:29 +0200 | [diff] [blame] | 338 | struct proxy *px = l->bind_conf->frontend; |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 339 | int ret = 1; |
| 340 | |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 341 | HA_SPIN_LOCK(LISTENER_LOCK, &l->lock); |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 342 | |
Willy Tarreau | 02e1975 | 2020-09-23 17:17:22 +0200 | [diff] [blame] | 343 | if ((global.mode & (MODE_DAEMON | MODE_MWORKER)) && |
| 344 | !(proc_mask(l->rx.settings->bind_proc) & pid_bit)) |
| 345 | goto end; |
| 346 | |
Willy Tarreau | 9b3a932 | 2020-09-24 14:46:34 +0200 | [diff] [blame] | 347 | if (l->state <= LI_PAUSED) |
| 348 | goto end; |
| 349 | |
Willy Tarreau | b743661 | 2020-08-28 19:51:44 +0200 | [diff] [blame] | 350 | if (l->rx.proto->pause) { |
Willy Tarreau | 092d865 | 2014-07-07 20:22:12 +0200 | [diff] [blame] | 351 | /* Returns < 0 in case of failure, 0 if the listener |
| 352 | * was totally stopped, or > 0 if correctly paused. |
| 353 | */ |
Willy Tarreau | fb76bd5 | 2020-09-24 18:07:48 +0200 | [diff] [blame] | 354 | ret = l->rx.proto->pause(l); |
Willy Tarreau | be58c38 | 2011-07-24 18:28:10 +0200 | [diff] [blame] | 355 | |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 356 | if (ret < 0) { |
| 357 | ret = 0; |
| 358 | goto end; |
| 359 | } |
Willy Tarreau | fb76bd5 | 2020-09-24 18:07:48 +0200 | [diff] [blame] | 360 | ret = 1; |
Willy Tarreau | b3fb60b | 2012-10-04 08:56:31 +0200 | [diff] [blame] | 361 | } |
Willy Tarreau | be58c38 | 2011-07-24 18:28:10 +0200 | [diff] [blame] | 362 | |
Olivier Houchard | 859dc80 | 2019-08-08 15:47:21 +0200 | [diff] [blame] | 363 | MT_LIST_DEL(&l->wait_queue); |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 364 | |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 365 | listener_set_state(l, LI_PAUSED); |
Willy Tarreau | 58651b4 | 2020-09-24 16:03:29 +0200 | [diff] [blame] | 366 | |
| 367 | if (px && !px->li_ready) { |
| 368 | ha_warning("Paused %s %s.\n", proxy_cap_str(px->cap), px->id); |
| 369 | send_log(px, LOG_WARNING, "Paused %s %s.\n", proxy_cap_str(px->cap), px->id); |
| 370 | } |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 371 | end: |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 372 | HA_SPIN_UNLOCK(LISTENER_LOCK, &l->lock); |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 373 | return ret; |
Willy Tarreau | be58c38 | 2011-07-24 18:28:10 +0200 | [diff] [blame] | 374 | } |
| 375 | |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 376 | /* This function tries to resume a temporarily disabled listener. Paused, full, |
| 377 | * limited and disabled listeners are handled, which means that this function |
| 378 | * may replace enable_listener(). The resulting state will either be LI_READY |
| 379 | * 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] | 380 | * 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] | 381 | * foreground mode, and are ignored. If the listener was only in the assigned |
| 382 | * state, it's totally rebound. This can happen if a pause() has completely |
| 383 | * stopped it. If the resume fails, 0 is returned and an error might be |
| 384 | * displayed. |
Willy Tarreau | be58c38 | 2011-07-24 18:28:10 +0200 | [diff] [blame] | 385 | */ |
Willy Tarreau | 01abd02 | 2019-02-28 10:27:18 +0100 | [diff] [blame] | 386 | int resume_listener(struct listener *l) |
Willy Tarreau | be58c38 | 2011-07-24 18:28:10 +0200 | [diff] [blame] | 387 | { |
Willy Tarreau | 58651b4 | 2020-09-24 16:03:29 +0200 | [diff] [blame] | 388 | struct proxy *px = l->bind_conf->frontend; |
| 389 | int was_paused = px && px->li_paused; |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 390 | int ret = 1; |
| 391 | |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 392 | HA_SPIN_LOCK(LISTENER_LOCK, &l->lock); |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 393 | |
Willy Tarreau | f2cb169 | 2019-07-11 10:08:31 +0200 | [diff] [blame] | 394 | /* check that another thread didn't to the job in parallel (e.g. at the |
| 395 | * end of listen_accept() while we'd come from dequeue_all_listeners(). |
| 396 | */ |
Olivier Houchard | 859dc80 | 2019-08-08 15:47:21 +0200 | [diff] [blame] | 397 | if (MT_LIST_ADDED(&l->wait_queue)) |
Willy Tarreau | f2cb169 | 2019-07-11 10:08:31 +0200 | [diff] [blame] | 398 | goto end; |
| 399 | |
William Lallemand | 095ba4c | 2017-06-01 17:38:50 +0200 | [diff] [blame] | 400 | if ((global.mode & (MODE_DAEMON | MODE_MWORKER)) && |
Willy Tarreau | 818a92e | 2020-09-03 07:50:19 +0200 | [diff] [blame] | 401 | !(proc_mask(l->rx.settings->bind_proc) & pid_bit)) |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 402 | goto end; |
Willy Tarreau | 3569df3 | 2017-03-15 12:47:46 +0100 | [diff] [blame] | 403 | |
Willy Tarreau | 5d7f9ce | 2020-09-24 18:54:11 +0200 | [diff] [blame] | 404 | if (l->state == LI_READY) |
| 405 | goto end; |
| 406 | |
Willy Tarreau | 1c4b814 | 2014-07-07 21:06:24 +0200 | [diff] [blame] | 407 | if (l->state == LI_ASSIGNED) { |
| 408 | char msg[100]; |
| 409 | int err; |
| 410 | |
Willy Tarreau | b3580b1 | 2020-09-01 10:26:22 +0200 | [diff] [blame] | 411 | err = l->rx.proto->listen(l, msg, sizeof(msg)); |
Willy Tarreau | 1c4b814 | 2014-07-07 21:06:24 +0200 | [diff] [blame] | 412 | if (err & ERR_ALERT) |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 413 | ha_alert("Resuming listener: %s\n", msg); |
Willy Tarreau | 1c4b814 | 2014-07-07 21:06:24 +0200 | [diff] [blame] | 414 | else if (err & ERR_WARN) |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 415 | ha_warning("Resuming listener: %s\n", msg); |
Willy Tarreau | 1c4b814 | 2014-07-07 21:06:24 +0200 | [diff] [blame] | 416 | |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 417 | if (err & (ERR_FATAL | ERR_ABORT)) { |
| 418 | ret = 0; |
| 419 | goto end; |
| 420 | } |
Willy Tarreau | 1c4b814 | 2014-07-07 21:06:24 +0200 | [diff] [blame] | 421 | } |
| 422 | |
Willy Tarreau | c6dac6c | 2020-09-23 17:34:22 +0200 | [diff] [blame] | 423 | if (l->state < LI_PAUSED) { |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 424 | ret = 0; |
| 425 | goto end; |
| 426 | } |
Willy Tarreau | be58c38 | 2011-07-24 18:28:10 +0200 | [diff] [blame] | 427 | |
Willy Tarreau | b743661 | 2020-08-28 19:51:44 +0200 | [diff] [blame] | 428 | if (l->rx.proto->sock_prot == IPPROTO_TCP && |
Willy Tarreau | b3fb60b | 2012-10-04 08:56:31 +0200 | [diff] [blame] | 429 | l->state == LI_PAUSED && |
Willy Tarreau | 38ba647 | 2020-08-27 08:16:52 +0200 | [diff] [blame] | 430 | listen(l->rx.fd, listener_backlog(l)) != 0) { |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 431 | ret = 0; |
| 432 | goto end; |
| 433 | } |
Willy Tarreau | be58c38 | 2011-07-24 18:28:10 +0200 | [diff] [blame] | 434 | |
Willy Tarreau | a8cf66b | 2019-02-27 16:49:00 +0100 | [diff] [blame] | 435 | if (l->maxconn && l->nbconn >= l->maxconn) { |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 436 | listener_set_state(l, LI_FULL); |
Willy Tarreau | 58651b4 | 2020-09-24 16:03:29 +0200 | [diff] [blame] | 437 | goto done; |
Willy Tarreau | be58c38 | 2011-07-24 18:28:10 +0200 | [diff] [blame] | 438 | } |
| 439 | |
Willy Tarreau | 38ba647 | 2020-08-27 08:16:52 +0200 | [diff] [blame] | 440 | fd_want_recv(l->rx.fd); |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 441 | listener_set_state(l, LI_READY); |
Willy Tarreau | 58651b4 | 2020-09-24 16:03:29 +0200 | [diff] [blame] | 442 | |
| 443 | done: |
| 444 | if (was_paused && !px->li_paused) { |
| 445 | ha_warning("Resumed %s %s.\n", proxy_cap_str(px->cap), px->id); |
| 446 | send_log(px, LOG_WARNING, "Resumed %s %s.\n", proxy_cap_str(px->cap), px->id); |
| 447 | } |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 448 | end: |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 449 | HA_SPIN_UNLOCK(LISTENER_LOCK, &l->lock); |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 450 | return ret; |
| 451 | } |
| 452 | |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 453 | /* 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] | 454 | * it upon next close() using resume_listener(). |
| 455 | */ |
Christopher Faulet | 5580ba2 | 2017-08-28 15:29:20 +0200 | [diff] [blame] | 456 | static void listener_full(struct listener *l) |
Willy Tarreau | 6279371 | 2011-07-24 19:23:38 +0200 | [diff] [blame] | 457 | { |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 458 | HA_SPIN_LOCK(LISTENER_LOCK, &l->lock); |
Willy Tarreau | 6279371 | 2011-07-24 19:23:38 +0200 | [diff] [blame] | 459 | if (l->state >= LI_READY) { |
Olivier Houchard | 859dc80 | 2019-08-08 15:47:21 +0200 | [diff] [blame] | 460 | MT_LIST_DEL(&l->wait_queue); |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 461 | if (l->state != LI_FULL) { |
Willy Tarreau | 38ba647 | 2020-08-27 08:16:52 +0200 | [diff] [blame] | 462 | fd_stop_recv(l->rx.fd); |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 463 | listener_set_state(l, LI_FULL); |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 464 | } |
Willy Tarreau | 6279371 | 2011-07-24 19:23:38 +0200 | [diff] [blame] | 465 | } |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 466 | HA_SPIN_UNLOCK(LISTENER_LOCK, &l->lock); |
Willy Tarreau | 6279371 | 2011-07-24 19:23:38 +0200 | [diff] [blame] | 467 | } |
| 468 | |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 469 | /* Marks a ready listener as limited so that we only try to re-enable it when |
| 470 | * resources are free again. It will be queued into the specified queue. |
| 471 | */ |
Olivier Houchard | 859dc80 | 2019-08-08 15:47:21 +0200 | [diff] [blame] | 472 | static void limit_listener(struct listener *l, struct mt_list *list) |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 473 | { |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 474 | HA_SPIN_LOCK(LISTENER_LOCK, &l->lock); |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 475 | if (l->state == LI_READY) { |
Willy Tarreau | de4db17 | 2020-07-10 08:10:29 +0200 | [diff] [blame] | 476 | MT_LIST_TRY_ADDQ(list, &l->wait_queue); |
Willy Tarreau | 38ba647 | 2020-08-27 08:16:52 +0200 | [diff] [blame] | 477 | fd_stop_recv(l->rx.fd); |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 478 | listener_set_state(l, LI_LIMITED); |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 479 | } |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 480 | HA_SPIN_UNLOCK(LISTENER_LOCK, &l->lock); |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 481 | } |
| 482 | |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 483 | /* This function adds all of the protocol's listener's file descriptors to the |
| 484 | * polling lists when they are in the LI_LISTEN state. It is intended to be |
| 485 | * used as a protocol's generic enable_all() primitive, for use after the |
| 486 | * fork(). It puts the listeners into LI_READY or LI_FULL states depending on |
| 487 | * their number of connections. It always returns ERR_NONE. |
Willy Tarreau | daacf36 | 2019-07-24 16:45:02 +0200 | [diff] [blame] | 488 | * |
| 489 | * Must be called with proto_lock held. |
| 490 | * |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 491 | */ |
| 492 | int enable_all_listeners(struct protocol *proto) |
| 493 | { |
| 494 | struct listener *listener; |
| 495 | |
Willy Tarreau | b743661 | 2020-08-28 19:51:44 +0200 | [diff] [blame] | 496 | list_for_each_entry(listener, &proto->listeners, rx.proto_list) |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 497 | enable_listener(listener); |
| 498 | return ERR_NONE; |
| 499 | } |
| 500 | |
| 501 | /* This function removes all of the protocol's listener's file descriptors from |
| 502 | * the polling lists when they are in the LI_READY or LI_FULL states. It is |
| 503 | * intended to be used as a protocol's generic disable_all() primitive. It puts |
| 504 | * the listeners into LI_LISTEN, and always returns ERR_NONE. |
Willy Tarreau | daacf36 | 2019-07-24 16:45:02 +0200 | [diff] [blame] | 505 | * |
| 506 | * Must be called with proto_lock held. |
| 507 | * |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 508 | */ |
| 509 | int disable_all_listeners(struct protocol *proto) |
| 510 | { |
| 511 | struct listener *listener; |
| 512 | |
Willy Tarreau | b743661 | 2020-08-28 19:51:44 +0200 | [diff] [blame] | 513 | list_for_each_entry(listener, &proto->listeners, rx.proto_list) |
Willy Tarreau | dabf2e2 | 2007-10-28 21:59:24 +0100 | [diff] [blame] | 514 | disable_listener(listener); |
| 515 | return ERR_NONE; |
| 516 | } |
| 517 | |
Willy Tarreau | 241797a | 2019-12-10 14:10:52 +0100 | [diff] [blame] | 518 | /* Dequeues all listeners waiting for a resource the global wait queue */ |
| 519 | void dequeue_all_listeners() |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 520 | { |
Willy Tarreau | 01abd02 | 2019-02-28 10:27:18 +0100 | [diff] [blame] | 521 | struct listener *listener; |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 522 | |
Willy Tarreau | 241797a | 2019-12-10 14:10:52 +0100 | [diff] [blame] | 523 | while ((listener = MT_LIST_POP(&global_listener_queue, struct listener *, wait_queue))) { |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 524 | /* This cannot fail because the listeners are by definition in |
Willy Tarreau | 01abd02 | 2019-02-28 10:27:18 +0100 | [diff] [blame] | 525 | * the LI_LIMITED state. |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 526 | */ |
Willy Tarreau | 01abd02 | 2019-02-28 10:27:18 +0100 | [diff] [blame] | 527 | resume_listener(listener); |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 528 | } |
| 529 | } |
| 530 | |
Willy Tarreau | 241797a | 2019-12-10 14:10:52 +0100 | [diff] [blame] | 531 | /* Dequeues all listeners waiting for a resource in proxy <px>'s queue */ |
| 532 | void dequeue_proxy_listeners(struct proxy *px) |
| 533 | { |
| 534 | struct listener *listener; |
| 535 | |
| 536 | while ((listener = MT_LIST_POP(&px->listener_queue, struct listener *, wait_queue))) { |
| 537 | /* This cannot fail because the listeners are by definition in |
| 538 | * the LI_LIMITED state. |
| 539 | */ |
| 540 | resume_listener(listener); |
| 541 | } |
| 542 | } |
| 543 | |
Christopher Faulet | 510c0d6 | 2018-03-16 10:04:47 +0100 | [diff] [blame] | 544 | /* Must be called with the lock held. Depending on <do_close> value, it does |
Willy Tarreau | b6607bf | 2020-09-23 16:24:23 +0200 | [diff] [blame] | 545 | * what unbind_listener or unbind_listener_no_close should do. It can also |
| 546 | * close a zombie listener's FD when called in early states. |
Christopher Faulet | 510c0d6 | 2018-03-16 10:04:47 +0100 | [diff] [blame] | 547 | */ |
| 548 | void do_unbind_listener(struct listener *listener, int do_close) |
Willy Tarreau | b648d63 | 2007-10-28 22:13:50 +0100 | [diff] [blame] | 549 | { |
Olivier Houchard | a518856 | 2019-03-08 15:35:42 +0100 | [diff] [blame] | 550 | if (listener->state == LI_READY && fd_updt) |
Willy Tarreau | 38ba647 | 2020-08-27 08:16:52 +0200 | [diff] [blame] | 551 | fd_stop_recv(listener->rx.fd); |
Willy Tarreau | b648d63 | 2007-10-28 22:13:50 +0100 | [diff] [blame] | 552 | |
Olivier Houchard | 859dc80 | 2019-08-08 15:47:21 +0200 | [diff] [blame] | 553 | MT_LIST_DEL(&listener->wait_queue); |
Willy Tarreau | e6ca1fc | 2011-07-24 22:03:52 +0200 | [diff] [blame] | 554 | |
Willy Tarreau | be58c38 | 2011-07-24 18:28:10 +0200 | [diff] [blame] | 555 | if (listener->state >= LI_PAUSED) { |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 556 | listener_set_state(listener, LI_ASSIGNED); |
Willy Tarreau | 38ba647 | 2020-08-27 08:16:52 +0200 | [diff] [blame] | 557 | fd_stop_both(listener->rx.fd); |
Willy Tarreau | b6607bf | 2020-09-23 16:24:23 +0200 | [diff] [blame] | 558 | } |
| 559 | |
| 560 | if (do_close && listener->rx.fd != -1) { |
| 561 | fd_delete(listener->rx.fd); |
| 562 | listener->rx.flags &= ~RX_F_BOUND; |
| 563 | listener->rx.fd = -1; |
Willy Tarreau | b648d63 | 2007-10-28 22:13:50 +0100 | [diff] [blame] | 564 | } |
Willy Tarreau | bbd09b9 | 2017-11-05 11:38:44 +0100 | [diff] [blame] | 565 | } |
| 566 | |
Olivier Houchard | 1fc0516 | 2017-04-06 01:05:05 +0200 | [diff] [blame] | 567 | /* This function closes the listening socket for the specified listener, |
| 568 | * provided that it's already in a listening state. The listener enters the |
Willy Tarreau | bbd09b9 | 2017-11-05 11:38:44 +0100 | [diff] [blame] | 569 | * LI_ASSIGNED state. This function is intended to be used as a generic |
| 570 | * function for standard protocols. |
Olivier Houchard | 1fc0516 | 2017-04-06 01:05:05 +0200 | [diff] [blame] | 571 | */ |
Willy Tarreau | bbd09b9 | 2017-11-05 11:38:44 +0100 | [diff] [blame] | 572 | void unbind_listener(struct listener *listener) |
Olivier Houchard | 1fc0516 | 2017-04-06 01:05:05 +0200 | [diff] [blame] | 573 | { |
Christopher Faulet | 510c0d6 | 2018-03-16 10:04:47 +0100 | [diff] [blame] | 574 | HA_SPIN_LOCK(LISTENER_LOCK, &listener->lock); |
Willy Tarreau | bbd09b9 | 2017-11-05 11:38:44 +0100 | [diff] [blame] | 575 | do_unbind_listener(listener, 1); |
Christopher Faulet | 510c0d6 | 2018-03-16 10:04:47 +0100 | [diff] [blame] | 576 | HA_SPIN_UNLOCK(LISTENER_LOCK, &listener->lock); |
Olivier Houchard | 1fc0516 | 2017-04-06 01:05:05 +0200 | [diff] [blame] | 577 | } |
| 578 | |
| 579 | /* This function pretends the listener is dead, but keeps the FD opened, so |
| 580 | * that we can provide it, for conf reloading. |
| 581 | */ |
Willy Tarreau | bbd09b9 | 2017-11-05 11:38:44 +0100 | [diff] [blame] | 582 | void unbind_listener_no_close(struct listener *listener) |
Olivier Houchard | 1fc0516 | 2017-04-06 01:05:05 +0200 | [diff] [blame] | 583 | { |
Christopher Faulet | 510c0d6 | 2018-03-16 10:04:47 +0100 | [diff] [blame] | 584 | HA_SPIN_LOCK(LISTENER_LOCK, &listener->lock); |
Willy Tarreau | bbd09b9 | 2017-11-05 11:38:44 +0100 | [diff] [blame] | 585 | do_unbind_listener(listener, 0); |
Christopher Faulet | 510c0d6 | 2018-03-16 10:04:47 +0100 | [diff] [blame] | 586 | HA_SPIN_UNLOCK(LISTENER_LOCK, &listener->lock); |
Olivier Houchard | 1fc0516 | 2017-04-06 01:05:05 +0200 | [diff] [blame] | 587 | } |
| 588 | |
Willy Tarreau | 0de59fd | 2017-09-15 08:10:44 +0200 | [diff] [blame] | 589 | /* creates one or multiple listeners for bind_conf <bc> on sockaddr <ss> on port |
| 590 | * 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] | 591 | * allocation). The address family is taken from ss->ss_family, and the protocol |
| 592 | * passed in <proto> must be usable on this family. The number of jobs and |
| 593 | * listeners is automatically increased by the number of listeners created. It |
| 594 | * 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] | 595 | */ |
| 596 | int create_listeners(struct bind_conf *bc, const struct sockaddr_storage *ss, |
Willy Tarreau | 9b3178d | 2020-09-16 17:58:55 +0200 | [diff] [blame] | 597 | int portl, int porth, int fd, struct protocol *proto, char **err) |
Willy Tarreau | 0de59fd | 2017-09-15 08:10:44 +0200 | [diff] [blame] | 598 | { |
Willy Tarreau | 0de59fd | 2017-09-15 08:10:44 +0200 | [diff] [blame] | 599 | struct listener *l; |
| 600 | int port; |
| 601 | |
Willy Tarreau | 0de59fd | 2017-09-15 08:10:44 +0200 | [diff] [blame] | 602 | for (port = portl; port <= porth; port++) { |
| 603 | l = calloc(1, sizeof(*l)); |
| 604 | if (!l) { |
| 605 | memprintf(err, "out of memory"); |
| 606 | return 0; |
| 607 | } |
| 608 | l->obj_type = OBJ_TYPE_LISTENER; |
| 609 | LIST_ADDQ(&bc->frontend->conf.listeners, &l->by_fe); |
| 610 | LIST_ADDQ(&bc->listeners, &l->by_bind); |
| 611 | l->bind_conf = bc; |
Willy Tarreau | 0fce6bc | 2020-09-03 07:46:06 +0200 | [diff] [blame] | 612 | l->rx.settings = &bc->settings; |
Willy Tarreau | eef4542 | 2020-09-03 10:05:03 +0200 | [diff] [blame] | 613 | l->rx.owner = l; |
Willy Tarreau | 38ba647 | 2020-08-27 08:16:52 +0200 | [diff] [blame] | 614 | l->rx.fd = fd; |
Willy Tarreau | 3715906 | 2020-08-27 07:48:42 +0200 | [diff] [blame] | 615 | memcpy(&l->rx.addr, ss, sizeof(*ss)); |
Olivier Houchard | 859dc80 | 2019-08-08 15:47:21 +0200 | [diff] [blame] | 616 | MT_LIST_INIT(&l->wait_queue); |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 617 | listener_set_state(l, LI_INIT); |
Willy Tarreau | 0de59fd | 2017-09-15 08:10:44 +0200 | [diff] [blame] | 618 | |
| 619 | proto->add(l, port); |
| 620 | |
Willy Tarreau | 909c23b | 2020-09-15 13:50:58 +0200 | [diff] [blame] | 621 | if (fd != -1) |
Willy Tarreau | 43046fa | 2020-09-01 15:41:59 +0200 | [diff] [blame] | 622 | l->rx.flags |= RX_F_INHERITED; |
William Lallemand | 75ea0a0 | 2017-11-15 19:02:58 +0100 | [diff] [blame] | 623 | |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 624 | HA_SPIN_INIT(&l->lock); |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 625 | _HA_ATOMIC_ADD(&jobs, 1); |
| 626 | _HA_ATOMIC_ADD(&listeners, 1); |
Willy Tarreau | 0de59fd | 2017-09-15 08:10:44 +0200 | [diff] [blame] | 627 | } |
| 628 | return 1; |
| 629 | } |
| 630 | |
Willy Tarreau | 1a64d16 | 2007-10-28 22:26:05 +0100 | [diff] [blame] | 631 | /* Delete a listener from its protocol's list of listeners. The listener's |
| 632 | * 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] | 633 | * number of listeners is updated, as well as the global number of listeners |
| 634 | * and jobs. Note that the listener must have previously been unbound. This |
| 635 | * is the generic function to use to remove a listener. |
Willy Tarreau | daacf36 | 2019-07-24 16:45:02 +0200 | [diff] [blame] | 636 | * |
| 637 | * Will grab the proto_lock. |
| 638 | * |
Willy Tarreau | 1a64d16 | 2007-10-28 22:26:05 +0100 | [diff] [blame] | 639 | */ |
| 640 | void delete_listener(struct listener *listener) |
| 641 | { |
Willy Tarreau | 6ee9f8d | 2019-08-26 10:55:52 +0200 | [diff] [blame] | 642 | HA_SPIN_LOCK(PROTO_LOCK, &proto_lock); |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 643 | HA_SPIN_LOCK(LISTENER_LOCK, &listener->lock); |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 644 | if (listener->state == LI_ASSIGNED) { |
Willy Tarreau | a37b244 | 2020-09-24 07:23:45 +0200 | [diff] [blame] | 645 | listener_set_state(listener, LI_INIT); |
Willy Tarreau | b743661 | 2020-08-28 19:51:44 +0200 | [diff] [blame] | 646 | LIST_DEL(&listener->rx.proto_list); |
| 647 | listener->rx.proto->nb_listeners--; |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 648 | _HA_ATOMIC_SUB(&jobs, 1); |
| 649 | _HA_ATOMIC_SUB(&listeners, 1); |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 650 | } |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 651 | HA_SPIN_UNLOCK(LISTENER_LOCK, &listener->lock); |
Willy Tarreau | 6ee9f8d | 2019-08-26 10:55:52 +0200 | [diff] [blame] | 652 | HA_SPIN_UNLOCK(PROTO_LOCK, &proto_lock); |
Willy Tarreau | 1a64d16 | 2007-10-28 22:26:05 +0100 | [diff] [blame] | 653 | } |
| 654 | |
Willy Tarreau | e2711c7 | 2019-02-27 15:39:41 +0100 | [diff] [blame] | 655 | /* Returns a suitable value for a listener's backlog. It uses the listener's, |
| 656 | * otherwise the frontend's backlog, otherwise the listener's maxconn, |
| 657 | * otherwise the frontend's maxconn, otherwise 1024. |
| 658 | */ |
| 659 | int listener_backlog(const struct listener *l) |
| 660 | { |
| 661 | if (l->backlog) |
| 662 | return l->backlog; |
| 663 | |
| 664 | if (l->bind_conf->frontend->backlog) |
| 665 | return l->bind_conf->frontend->backlog; |
| 666 | |
| 667 | if (l->maxconn) |
| 668 | return l->maxconn; |
| 669 | |
| 670 | if (l->bind_conf->frontend->maxconn) |
| 671 | return l->bind_conf->frontend->maxconn; |
| 672 | |
| 673 | return 1024; |
| 674 | } |
| 675 | |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 676 | /* This function is called on a read event from a listening socket, corresponding |
| 677 | * to an accept. It tries to accept as many connections as possible, and for each |
| 678 | * calls the listener's accept handler (generally the frontend's accept handler). |
| 679 | */ |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 680 | void listener_accept(int fd) |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 681 | { |
| 682 | struct listener *l = fdtab[fd].owner; |
Olivier Houchard | d16a9df | 2019-02-25 16:18:16 +0100 | [diff] [blame] | 683 | struct proxy *p; |
Christopher Faulet | 102854c | 2019-04-30 12:17:13 +0200 | [diff] [blame] | 684 | unsigned int max_accept; |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 685 | int next_conn = 0; |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 686 | int next_feconn = 0; |
| 687 | int next_actconn = 0; |
Willy Tarreau | bb66030 | 2014-05-07 19:47:02 +0200 | [diff] [blame] | 688 | int expire; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 689 | int cfd; |
| 690 | int ret; |
Willy Tarreau | 818dca5 | 2014-01-31 19:40:19 +0100 | [diff] [blame] | 691 | #ifdef USE_ACCEPT4 |
| 692 | static int accept4_broken; |
| 693 | #endif |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 694 | |
Olivier Houchard | d16a9df | 2019-02-25 16:18:16 +0100 | [diff] [blame] | 695 | if (!l) |
| 696 | return; |
| 697 | p = l->bind_conf->frontend; |
Christopher Faulet | 102854c | 2019-04-30 12:17:13 +0200 | [diff] [blame] | 698 | |
| 699 | /* if l->maxaccept is -1, then max_accept is UINT_MAX. It is not really |
| 700 | * illimited, but it is probably enough. |
| 701 | */ |
Olivier Houchard | d16a9df | 2019-02-25 16:18:16 +0100 | [diff] [blame] | 702 | max_accept = l->maxaccept ? l->maxaccept : 1; |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 703 | |
Willy Tarreau | 93e7c00 | 2013-10-07 18:51:07 +0200 | [diff] [blame] | 704 | if (!(l->options & LI_O_UNLIMITED) && global.sps_lim) { |
| 705 | 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] | 706 | |
| 707 | if (unlikely(!max)) { |
| 708 | /* frontend accept rate limit was reached */ |
Willy Tarreau | 93e7c00 | 2013-10-07 18:51:07 +0200 | [diff] [blame] | 709 | 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] | 710 | goto limit_global; |
Willy Tarreau | 93e7c00 | 2013-10-07 18:51:07 +0200 | [diff] [blame] | 711 | } |
| 712 | |
| 713 | if (max_accept > max) |
| 714 | max_accept = max; |
| 715 | } |
| 716 | |
| 717 | if (!(l->options & LI_O_UNLIMITED) && global.cps_lim) { |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 718 | int max = freq_ctr_remain(&global.conn_per_sec, global.cps_lim, 0); |
| 719 | |
| 720 | if (unlikely(!max)) { |
| 721 | /* frontend accept rate limit was reached */ |
Willy Tarreau | 93e7c00 | 2013-10-07 18:51:07 +0200 | [diff] [blame] | 722 | 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] | 723 | goto limit_global; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 724 | } |
| 725 | |
| 726 | if (max_accept > max) |
| 727 | max_accept = max; |
| 728 | } |
Willy Tarreau | e43d532 | 2013-10-07 20:01:52 +0200 | [diff] [blame] | 729 | #ifdef USE_OPENSSL |
| 730 | if (!(l->options & LI_O_UNLIMITED) && global.ssl_lim && l->bind_conf && l->bind_conf->is_ssl) { |
| 731 | 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] | 732 | |
Willy Tarreau | e43d532 | 2013-10-07 20:01:52 +0200 | [diff] [blame] | 733 | if (unlikely(!max)) { |
| 734 | /* frontend accept rate limit was reached */ |
Willy Tarreau | e43d532 | 2013-10-07 20:01:52 +0200 | [diff] [blame] | 735 | 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] | 736 | goto limit_global; |
Willy Tarreau | e43d532 | 2013-10-07 20:01:52 +0200 | [diff] [blame] | 737 | } |
| 738 | |
| 739 | if (max_accept > max) |
| 740 | max_accept = max; |
| 741 | } |
| 742 | #endif |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 743 | if (p && p->fe_sps_lim) { |
| 744 | int max = freq_ctr_remain(&p->fe_sess_per_sec, p->fe_sps_lim, 0); |
| 745 | |
| 746 | if (unlikely(!max)) { |
| 747 | /* frontend accept rate limit was reached */ |
Willy Tarreau | 0591bf7 | 2019-12-10 12:01:21 +0100 | [diff] [blame] | 748 | expire = tick_add(now_ms, next_event_delay(&p->fe_sess_per_sec, p->fe_sps_lim, 0)); |
| 749 | goto limit_proxy; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 750 | } |
| 751 | |
| 752 | if (max_accept > max) |
| 753 | max_accept = max; |
| 754 | } |
| 755 | |
| 756 | /* Note: if we fail to allocate a connection because of configured |
| 757 | * limits, we'll schedule a new attempt worst 1 second later in the |
| 758 | * worst case. If we fail due to system limits or temporary resource |
| 759 | * shortage, we try again 100ms later in the worst case. |
| 760 | */ |
Christopher Faulet | 102854c | 2019-04-30 12:17:13 +0200 | [diff] [blame] | 761 | for (; max_accept; next_conn = next_feconn = next_actconn = 0, max_accept--) { |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 762 | struct sockaddr_storage addr; |
| 763 | socklen_t laddr = sizeof(addr); |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 764 | unsigned int count; |
Willy Tarreau | af613e8 | 2020-06-05 08:40:51 +0200 | [diff] [blame] | 765 | __decl_thread(unsigned long mask); |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 766 | |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 767 | /* pre-increase the number of connections without going too far. |
| 768 | * We process the listener, then the proxy, then the process. |
| 769 | * We know which ones to unroll based on the next_xxx value. |
| 770 | */ |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 771 | do { |
| 772 | count = l->nbconn; |
Willy Tarreau | 93604ed | 2019-11-15 10:20:07 +0100 | [diff] [blame] | 773 | if (unlikely(l->maxconn && count >= l->maxconn)) { |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 774 | /* the listener was marked full or another |
| 775 | * thread is going to do it. |
| 776 | */ |
| 777 | next_conn = 0; |
Willy Tarreau | 93604ed | 2019-11-15 10:20:07 +0100 | [diff] [blame] | 778 | listener_full(l); |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 779 | goto end; |
| 780 | } |
| 781 | next_conn = count + 1; |
David Carlier | 5671662 | 2019-03-27 16:08:42 +0000 | [diff] [blame] | 782 | } while (!_HA_ATOMIC_CAS(&l->nbconn, (int *)(&count), next_conn)); |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 783 | |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 784 | if (p) { |
| 785 | do { |
| 786 | count = p->feconn; |
Willy Tarreau | 93604ed | 2019-11-15 10:20:07 +0100 | [diff] [blame] | 787 | if (unlikely(count >= p->maxconn)) { |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 788 | /* the frontend was marked full or another |
| 789 | * thread is going to do it. |
| 790 | */ |
| 791 | next_feconn = 0; |
Willy Tarreau | 0591bf7 | 2019-12-10 12:01:21 +0100 | [diff] [blame] | 792 | expire = TICK_ETERNITY; |
| 793 | goto limit_proxy; |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 794 | } |
| 795 | next_feconn = count + 1; |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 796 | } while (!_HA_ATOMIC_CAS(&p->feconn, &count, next_feconn)); |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 797 | } |
| 798 | |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 799 | if (!(l->options & LI_O_UNLIMITED)) { |
| 800 | do { |
| 801 | count = actconn; |
Willy Tarreau | 93604ed | 2019-11-15 10:20:07 +0100 | [diff] [blame] | 802 | if (unlikely(count >= global.maxconn)) { |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 803 | /* the process was marked full or another |
| 804 | * thread is going to do it. |
| 805 | */ |
| 806 | next_actconn = 0; |
Willy Tarreau | 0591bf7 | 2019-12-10 12:01:21 +0100 | [diff] [blame] | 807 | expire = tick_add(now_ms, 1000); /* try again in 1 second */ |
| 808 | goto limit_global; |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 809 | } |
| 810 | next_actconn = count + 1; |
David Carlier | 5671662 | 2019-03-27 16:08:42 +0000 | [diff] [blame] | 811 | } while (!_HA_ATOMIC_CAS(&actconn, (int *)(&count), next_actconn)); |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 812 | } |
| 813 | |
William Lallemand | 2fe7dd0 | 2018-09-11 16:51:29 +0200 | [diff] [blame] | 814 | /* with sockpair@ we don't want to do an accept */ |
Willy Tarreau | 3715906 | 2020-08-27 07:48:42 +0200 | [diff] [blame] | 815 | if (unlikely(l->rx.addr.ss_family == AF_CUST_SOCKPAIR)) { |
William Lallemand | 2fe7dd0 | 2018-09-11 16:51:29 +0200 | [diff] [blame] | 816 | if ((cfd = recv_fd_uxst(fd)) != -1) |
William Lallemand | d913800 | 2018-11-27 12:02:39 +0100 | [diff] [blame] | 817 | fcntl(cfd, F_SETFL, O_NONBLOCK); |
Willy Tarreau | 888d567 | 2019-01-27 18:34:12 +0100 | [diff] [blame] | 818 | /* just like with UNIX sockets, only the family is filled */ |
| 819 | addr.ss_family = AF_UNIX; |
| 820 | laddr = sizeof(addr.ss_family); |
William Lallemand | 2fe7dd0 | 2018-09-11 16:51:29 +0200 | [diff] [blame] | 821 | } else |
| 822 | |
Willy Tarreau | 1bc4aab | 2012-10-08 20:11:03 +0200 | [diff] [blame] | 823 | #ifdef USE_ACCEPT4 |
Willy Tarreau | 818dca5 | 2014-01-31 19:40:19 +0100 | [diff] [blame] | 824 | /* only call accept4() if it's known to be safe, otherwise |
| 825 | * fallback to the legacy accept() + fcntl(). |
| 826 | */ |
| 827 | if (unlikely(accept4_broken || |
William Lallemand | d913800 | 2018-11-27 12:02:39 +0100 | [diff] [blame] | 828 | ((cfd = accept4(fd, (struct sockaddr *)&addr, &laddr, SOCK_NONBLOCK)) == -1 && |
Willy Tarreau | 818dca5 | 2014-01-31 19:40:19 +0100 | [diff] [blame] | 829 | (errno == ENOSYS || errno == EINVAL || errno == EBADF) && |
| 830 | (accept4_broken = 1)))) |
| 831 | #endif |
Willy Tarreau | 6b3b0d4 | 2012-10-22 19:32:55 +0200 | [diff] [blame] | 832 | if ((cfd = accept(fd, (struct sockaddr *)&addr, &laddr)) != -1) |
William Lallemand | d913800 | 2018-11-27 12:02:39 +0100 | [diff] [blame] | 833 | fcntl(cfd, F_SETFL, O_NONBLOCK); |
Willy Tarreau | 818dca5 | 2014-01-31 19:40:19 +0100 | [diff] [blame] | 834 | |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 835 | if (unlikely(cfd == -1)) { |
| 836 | switch (errno) { |
| 837 | case EAGAIN: |
Willy Tarreau | 20aeb1c | 2019-12-10 08:42:21 +0100 | [diff] [blame] | 838 | if (fdtab[fd].ev & (FD_POLL_HUP|FD_POLL_ERR)) { |
Willy Tarreau | bb66030 | 2014-05-07 19:47:02 +0200 | [diff] [blame] | 839 | /* the listening socket might have been disabled in a shared |
| 840 | * process and we're a collateral victim. We'll just pause for |
| 841 | * a while in case it comes back. In the mean time, we need to |
| 842 | * clear this sticky flag. |
| 843 | */ |
Willy Tarreau | 20aeb1c | 2019-12-10 08:42:21 +0100 | [diff] [blame] | 844 | _HA_ATOMIC_AND(&fdtab[fd].ev, ~(FD_POLL_HUP|FD_POLL_ERR)); |
Willy Tarreau | bb66030 | 2014-05-07 19:47:02 +0200 | [diff] [blame] | 845 | goto transient_error; |
| 846 | } |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 847 | goto end; /* nothing more to accept */ |
Willy Tarreau | bb66030 | 2014-05-07 19:47:02 +0200 | [diff] [blame] | 848 | case EINVAL: |
| 849 | /* might be trying to accept on a shut fd (eg: soft stop) */ |
| 850 | goto transient_error; |
Willy Tarreau | a593ec5 | 2014-01-20 21:21:30 +0100 | [diff] [blame] | 851 | case EINTR: |
| 852 | case ECONNABORTED: |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 853 | _HA_ATOMIC_SUB(&l->nbconn, 1); |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 854 | if (p) |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 855 | _HA_ATOMIC_SUB(&p->feconn, 1); |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 856 | if (!(l->options & LI_O_UNLIMITED)) |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 857 | _HA_ATOMIC_SUB(&actconn, 1); |
Willy Tarreau | a593ec5 | 2014-01-20 21:21:30 +0100 | [diff] [blame] | 858 | continue; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 859 | case ENFILE: |
| 860 | if (p) |
| 861 | send_log(p, LOG_EMERG, |
Willy Tarreau | c5532ac | 2018-01-29 15:06:04 +0100 | [diff] [blame] | 862 | "Proxy %s reached system FD limit (maxsock=%d). Please check system tunables.\n", |
| 863 | p->id, global.maxsock); |
Willy Tarreau | bb66030 | 2014-05-07 19:47:02 +0200 | [diff] [blame] | 864 | goto transient_error; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 865 | case EMFILE: |
| 866 | if (p) |
| 867 | send_log(p, LOG_EMERG, |
Willy Tarreau | c5532ac | 2018-01-29 15:06:04 +0100 | [diff] [blame] | 868 | "Proxy %s reached process FD limit (maxsock=%d). Please check 'ulimit-n' and restart.\n", |
| 869 | p->id, global.maxsock); |
Willy Tarreau | bb66030 | 2014-05-07 19:47:02 +0200 | [diff] [blame] | 870 | goto transient_error; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 871 | case ENOBUFS: |
| 872 | case ENOMEM: |
| 873 | if (p) |
| 874 | send_log(p, LOG_EMERG, |
Willy Tarreau | c5532ac | 2018-01-29 15:06:04 +0100 | [diff] [blame] | 875 | "Proxy %s reached system memory limit (maxsock=%d). Please check system tunables.\n", |
| 876 | p->id, global.maxsock); |
Willy Tarreau | bb66030 | 2014-05-07 19:47:02 +0200 | [diff] [blame] | 877 | goto transient_error; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 878 | default: |
Willy Tarreau | a593ec5 | 2014-01-20 21:21:30 +0100 | [diff] [blame] | 879 | /* unexpected result, let's give up and let other tasks run */ |
Willy Tarreau | 9207993 | 2019-12-10 09:30:05 +0100 | [diff] [blame] | 880 | max_accept = 0; |
| 881 | goto end; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 882 | } |
| 883 | } |
| 884 | |
William Lallemand | d913800 | 2018-11-27 12:02:39 +0100 | [diff] [blame] | 885 | /* we don't want to leak the FD upon reload if it's in the master */ |
| 886 | if (unlikely(master == 1)) |
| 887 | fcntl(cfd, F_SETFD, FD_CLOEXEC); |
| 888 | |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 889 | /* The connection was accepted, it must be counted as such */ |
| 890 | if (l->counters) |
| 891 | HA_ATOMIC_UPDATE_MAX(&l->counters->conn_max, next_conn); |
| 892 | |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 893 | if (p) |
| 894 | HA_ATOMIC_UPDATE_MAX(&p->fe_counters.conn_max, next_feconn); |
| 895 | |
| 896 | proxy_inc_fe_conn_ctr(l, p); |
| 897 | |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 898 | if (!(l->options & LI_O_UNLIMITED)) { |
| 899 | count = update_freq_ctr(&global.conn_per_sec, 1); |
| 900 | HA_ATOMIC_UPDATE_MAX(&global.cps_max, count); |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 901 | } |
| 902 | |
Willy Tarreau | 64a9c05 | 2019-04-12 15:27:17 +0200 | [diff] [blame] | 903 | _HA_ATOMIC_ADD(&activity[tid].accepted, 1); |
| 904 | |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 905 | if (unlikely(cfd >= global.maxsock)) { |
| 906 | send_log(p, LOG_EMERG, |
| 907 | "Proxy %s reached the configured maximum connection limit. Please check the global 'maxconn' value.\n", |
| 908 | p->id); |
| 909 | close(cfd); |
Willy Tarreau | 0591bf7 | 2019-12-10 12:01:21 +0100 | [diff] [blame] | 910 | expire = tick_add(now_ms, 1000); /* try again in 1 second */ |
| 911 | goto limit_global; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 912 | } |
| 913 | |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 914 | /* past this point, l->accept() will automatically decrement |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 915 | * l->nbconn, feconn and actconn once done. Setting next_*conn=0 |
| 916 | * allows the error path not to rollback on nbconn. It's more |
| 917 | * convenient than duplicating all exit labels. |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 918 | */ |
| 919 | next_conn = 0; |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 920 | next_feconn = 0; |
| 921 | next_actconn = 0; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 922 | |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 923 | #if defined(USE_THREAD) |
Willy Tarreau | 818a92e | 2020-09-03 07:50:19 +0200 | [diff] [blame] | 924 | mask = thread_mask(l->rx.settings->bind_thread) & all_threads_mask; |
Willy Tarreau | a7da5e8 | 2020-03-12 17:33:29 +0100 | [diff] [blame] | 925 | if (atleast2(mask) && (global.tune.options & GTUNE_LISTENER_MQ) && !stopping) { |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 926 | struct accept_queue_ring *ring; |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 927 | unsigned int t, t0, t1, t2; |
Willy Tarreau | fc630bd | 2019-03-04 19:57:34 +0100 | [diff] [blame] | 928 | |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 929 | /* The principle is that we have two running indexes, |
| 930 | * each visiting in turn all threads bound to this |
| 931 | * listener. The connection will be assigned to the one |
| 932 | * with the least connections, and the other one will |
| 933 | * be updated. This provides a good fairness on short |
Willy Tarreau | fc630bd | 2019-03-04 19:57:34 +0100 | [diff] [blame] | 934 | * connections (round robin) and on long ones (conn |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 935 | * count), without ever missing any idle thread. |
Willy Tarreau | fc630bd | 2019-03-04 19:57:34 +0100 | [diff] [blame] | 936 | */ |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 937 | |
| 938 | /* keep a copy for the final update. thr_idx is composite |
| 939 | * and made of (t2<<16) + t1. |
| 940 | */ |
Willy Tarreau | 0cf3317 | 2019-03-06 15:26:33 +0100 | [diff] [blame] | 941 | t0 = l->thr_idx; |
Willy Tarreau | fc630bd | 2019-03-04 19:57:34 +0100 | [diff] [blame] | 942 | do { |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 943 | unsigned long m1, m2; |
| 944 | int q1, q2; |
| 945 | |
| 946 | t2 = t1 = t0; |
| 947 | t2 >>= 16; |
| 948 | t1 &= 0xFFFF; |
| 949 | |
| 950 | /* t1 walks low to high bits ; |
| 951 | * t2 walks high to low. |
| 952 | */ |
| 953 | m1 = mask >> t1; |
| 954 | m2 = mask & (t2 ? nbits(t2 + 1) : ~0UL); |
| 955 | |
Willy Tarreau | 85d0424 | 2019-04-16 18:09:13 +0200 | [diff] [blame] | 956 | if (unlikely(!(m1 & 1))) { |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 957 | m1 &= ~1UL; |
| 958 | if (!m1) { |
| 959 | m1 = mask; |
| 960 | t1 = 0; |
| 961 | } |
| 962 | t1 += my_ffsl(m1) - 1; |
| 963 | } |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 964 | |
Willy Tarreau | 85d0424 | 2019-04-16 18:09:13 +0200 | [diff] [blame] | 965 | if (unlikely(!(m2 & (1UL << t2)) || t1 == t2)) { |
| 966 | /* highest bit not set */ |
| 967 | if (!m2) |
| 968 | m2 = mask; |
| 969 | |
| 970 | t2 = my_flsl(m2) - 1; |
| 971 | } |
| 972 | |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 973 | /* now we have two distinct thread IDs belonging to the mask */ |
| 974 | q1 = accept_queue_rings[t1].tail - accept_queue_rings[t1].head + ACCEPT_QUEUE_SIZE; |
| 975 | if (q1 >= ACCEPT_QUEUE_SIZE) |
| 976 | q1 -= ACCEPT_QUEUE_SIZE; |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 977 | |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 978 | q2 = accept_queue_rings[t2].tail - accept_queue_rings[t2].head + ACCEPT_QUEUE_SIZE; |
| 979 | if (q2 >= ACCEPT_QUEUE_SIZE) |
| 980 | q2 -= ACCEPT_QUEUE_SIZE; |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 981 | |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 982 | /* we have 3 possibilities now : |
| 983 | * q1 < q2 : t1 is less loaded than t2, so we pick it |
| 984 | * and update t2 (since t1 might still be |
| 985 | * lower than another thread) |
| 986 | * q1 > q2 : t2 is less loaded than t1, so we pick it |
| 987 | * and update t1 (since t2 might still be |
| 988 | * lower than another thread) |
| 989 | * q1 = q2 : both are equally loaded, thus we pick t1 |
| 990 | * and update t1 as it will become more loaded |
| 991 | * than t2. |
| 992 | */ |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 993 | |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 994 | q1 += l->thr_conn[t1]; |
| 995 | q2 += l->thr_conn[t2]; |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 996 | |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 997 | if (q1 - q2 < 0) { |
| 998 | t = t1; |
| 999 | t2 = t2 ? t2 - 1 : LONGBITS - 1; |
| 1000 | } |
| 1001 | else if (q1 - q2 > 0) { |
| 1002 | t = t2; |
| 1003 | t1++; |
| 1004 | if (t1 >= LONGBITS) |
| 1005 | t1 = 0; |
| 1006 | } |
| 1007 | else { |
| 1008 | t = t1; |
| 1009 | t1++; |
| 1010 | if (t1 >= LONGBITS) |
| 1011 | t1 = 0; |
| 1012 | } |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 1013 | |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 1014 | /* new value for thr_idx */ |
| 1015 | t1 += (t2 << 16); |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 1016 | } while (unlikely(!_HA_ATOMIC_CAS(&l->thr_idx, &t0, t1))); |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 1017 | |
Willy Tarreau | 0fe703b | 2019-03-05 08:46:28 +0100 | [diff] [blame] | 1018 | /* We successfully selected the best thread "t" for this |
| 1019 | * connection. We use deferred accepts even if it's the |
| 1020 | * local thread because tests show that it's the best |
| 1021 | * performing model, likely due to better cache locality |
| 1022 | * when processing this loop. |
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 | ring = &accept_queue_rings[t]; |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 1025 | if (accept_queue_push_mp(ring, cfd, l, &addr, laddr)) { |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 1026 | _HA_ATOMIC_ADD(&activity[t].accq_pushed, 1); |
Willy Tarreau | 2bd65a7 | 2019-09-24 06:55:18 +0200 | [diff] [blame] | 1027 | tasklet_wakeup(ring->tasklet); |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 1028 | continue; |
| 1029 | } |
| 1030 | /* If the ring is full we do a synchronous accept on |
| 1031 | * the local thread here. |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 1032 | */ |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 1033 | _HA_ATOMIC_ADD(&activity[t].accq_full, 1); |
Willy Tarreau | e0e9c48 | 2019-01-27 15:37:19 +0100 | [diff] [blame] | 1034 | } |
| 1035 | #endif // USE_THREAD |
| 1036 | |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 1037 | _HA_ATOMIC_ADD(&l->thr_conn[tid], 1); |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 1038 | ret = l->accept(l, cfd, &addr); |
| 1039 | if (unlikely(ret <= 0)) { |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 1040 | /* The connection was closed by stream_accept(). Either |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 1041 | * we just have to ignore it (ret == 0) or it's a critical |
| 1042 | * error due to a resource shortage, and we must stop the |
| 1043 | * listener (ret < 0). |
| 1044 | */ |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 1045 | if (ret == 0) /* successful termination */ |
| 1046 | continue; |
| 1047 | |
Willy Tarreau | bb66030 | 2014-05-07 19:47:02 +0200 | [diff] [blame] | 1048 | goto transient_error; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 1049 | } |
| 1050 | |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 1051 | /* increase the per-process number of cumulated sessions, this |
| 1052 | * may only be done once l->accept() has accepted the connection. |
| 1053 | */ |
Willy Tarreau | 93e7c00 | 2013-10-07 18:51:07 +0200 | [diff] [blame] | 1054 | if (!(l->options & LI_O_UNLIMITED)) { |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 1055 | count = update_freq_ctr(&global.sess_per_sec, 1); |
| 1056 | HA_ATOMIC_UPDATE_MAX(&global.sps_max, count); |
Willy Tarreau | 93e7c00 | 2013-10-07 18:51:07 +0200 | [diff] [blame] | 1057 | } |
Willy Tarreau | e43d532 | 2013-10-07 20:01:52 +0200 | [diff] [blame] | 1058 | #ifdef USE_OPENSSL |
| 1059 | 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] | 1060 | count = update_freq_ctr(&global.ssl_per_sec, 1); |
| 1061 | HA_ATOMIC_UPDATE_MAX(&global.ssl_max, count); |
Willy Tarreau | e43d532 | 2013-10-07 20:01:52 +0200 | [diff] [blame] | 1062 | } |
| 1063 | #endif |
Willy Tarreau | 93e7c00 | 2013-10-07 18:51:07 +0200 | [diff] [blame] | 1064 | |
Willy Tarreau | 8d2c98b | 2020-05-01 09:51:11 +0200 | [diff] [blame] | 1065 | ti->flags &= ~TI_FL_STUCK; // this thread is still running |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 1066 | } /* end of for (max_accept--) */ |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 1067 | |
Christopher Faulet | 8d8aa0d | 2017-05-30 15:36:50 +0200 | [diff] [blame] | 1068 | end: |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 1069 | if (next_conn) |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 1070 | _HA_ATOMIC_SUB(&l->nbconn, 1); |
Willy Tarreau | 741b4d6 | 2019-02-25 15:02:04 +0100 | [diff] [blame] | 1071 | |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 1072 | if (p && next_feconn) |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 1073 | _HA_ATOMIC_SUB(&p->feconn, 1); |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 1074 | |
| 1075 | if (next_actconn) |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 1076 | _HA_ATOMIC_SUB(&actconn, 1); |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 1077 | |
Willy Tarreau | a8cf66b | 2019-02-27 16:49:00 +0100 | [diff] [blame] | 1078 | if ((l->state == LI_FULL && (!l->maxconn || l->nbconn < l->maxconn)) || |
Willy Tarreau | cdcba11 | 2019-12-11 15:06:30 +0100 | [diff] [blame] | 1079 | (l->state == LI_LIMITED && |
| 1080 | ((!p || p->feconn < p->maxconn) && (actconn < global.maxconn) && |
| 1081 | (!tick_isset(global_listener_queue_task->expire) || |
| 1082 | tick_is_expired(global_listener_queue_task->expire, now_ms))))) { |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 1083 | /* at least one thread has to this when quitting */ |
| 1084 | resume_listener(l); |
| 1085 | |
| 1086 | /* Dequeues all of the listeners waiting for a resource */ |
Willy Tarreau | 241797a | 2019-12-10 14:10:52 +0100 | [diff] [blame] | 1087 | dequeue_all_listeners(); |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 1088 | |
Olivier Houchard | 859dc80 | 2019-08-08 15:47:21 +0200 | [diff] [blame] | 1089 | if (p && !MT_LIST_ISEMPTY(&p->listener_queue) && |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 1090 | (!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] | 1091 | dequeue_proxy_listeners(p); |
Willy Tarreau | 3f0d02b | 2019-02-25 19:23:37 +0100 | [diff] [blame] | 1092 | } |
Willy Tarreau | 4c044e2 | 2019-12-05 07:40:32 +0100 | [diff] [blame] | 1093 | |
Willy Tarreau | 9207993 | 2019-12-10 09:30:05 +0100 | [diff] [blame] | 1094 | /* Now it's getting tricky. The listener was supposed to be in LI_READY |
| 1095 | * state but in the mean time we might have changed it to LI_FULL or |
| 1096 | * LI_LIMITED, and another thread might also have turned it to |
| 1097 | * LI_PAUSED, LI_LISTEN or even LI_INI when stopping a proxy. We must |
| 1098 | * be certain to keep the FD enabled when in the READY state but we |
| 1099 | * must also stop it for other states that we might have switched to |
| 1100 | * while others re-enabled polling. |
| 1101 | */ |
| 1102 | HA_SPIN_LOCK(LISTENER_LOCK, &l->lock); |
| 1103 | if (l->state == LI_READY) { |
| 1104 | if (max_accept > 0) |
| 1105 | fd_cant_recv(fd); |
| 1106 | else |
| 1107 | fd_done_recv(fd); |
| 1108 | } else if (l->state > LI_ASSIGNED) { |
Willy Tarreau | 38ba647 | 2020-08-27 08:16:52 +0200 | [diff] [blame] | 1109 | fd_stop_recv(l->rx.fd); |
Willy Tarreau | 9207993 | 2019-12-10 09:30:05 +0100 | [diff] [blame] | 1110 | } |
| 1111 | HA_SPIN_UNLOCK(LISTENER_LOCK, &l->lock); |
Willy Tarreau | 0591bf7 | 2019-12-10 12:01:21 +0100 | [diff] [blame] | 1112 | return; |
| 1113 | |
| 1114 | transient_error: |
| 1115 | /* pause the listener for up to 100 ms */ |
| 1116 | expire = tick_add(now_ms, 100); |
| 1117 | |
| 1118 | limit_global: |
| 1119 | /* (re-)queue the listener to the global queue and set it to expire no |
| 1120 | * later than <expire> ahead. The listener turns to LI_LIMITED. |
| 1121 | */ |
| 1122 | limit_listener(l, &global_listener_queue); |
| 1123 | task_schedule(global_listener_queue_task, expire); |
| 1124 | goto end; |
| 1125 | |
| 1126 | limit_proxy: |
| 1127 | /* (re-)queue the listener to the proxy's queue and set it to expire no |
| 1128 | * later than <expire> ahead. The listener turns to LI_LIMITED. |
| 1129 | */ |
| 1130 | limit_listener(l, &p->listener_queue); |
Willy Tarreau | eeea808 | 2020-01-08 19:15:07 +0100 | [diff] [blame] | 1131 | if (p->task && tick_isset(expire)) |
| 1132 | task_schedule(p->task, expire); |
Willy Tarreau | 0591bf7 | 2019-12-10 12:01:21 +0100 | [diff] [blame] | 1133 | goto end; |
Willy Tarreau | bbebbbf | 2012-05-07 21:22:09 +0200 | [diff] [blame] | 1134 | } |
| 1135 | |
Willy Tarreau | 05f5047 | 2017-09-15 09:19:58 +0200 | [diff] [blame] | 1136 | /* Notify the listener that a connection initiated from it was released. This |
| 1137 | * is used to keep the connection count consistent and to possibly re-open |
| 1138 | * listening when it was limited. |
| 1139 | */ |
| 1140 | void listener_release(struct listener *l) |
| 1141 | { |
| 1142 | struct proxy *fe = l->bind_conf->frontend; |
| 1143 | |
| 1144 | if (!(l->options & LI_O_UNLIMITED)) |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 1145 | _HA_ATOMIC_SUB(&actconn, 1); |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 1146 | if (fe) |
Olivier Houchard | 64213e9 | 2019-03-08 18:52:57 +0100 | [diff] [blame] | 1147 | _HA_ATOMIC_SUB(&fe->feconn, 1); |
| 1148 | _HA_ATOMIC_SUB(&l->nbconn, 1); |
| 1149 | _HA_ATOMIC_SUB(&l->thr_conn[tid], 1); |
Willy Tarreau | 82c9789 | 2019-02-27 19:32:32 +0100 | [diff] [blame] | 1150 | |
| 1151 | if (l->state == LI_FULL || l->state == LI_LIMITED) |
Willy Tarreau | 05f5047 | 2017-09-15 09:19:58 +0200 | [diff] [blame] | 1152 | resume_listener(l); |
| 1153 | |
| 1154 | /* Dequeues all of the listeners waiting for a resource */ |
Willy Tarreau | 241797a | 2019-12-10 14:10:52 +0100 | [diff] [blame] | 1155 | dequeue_all_listeners(); |
Willy Tarreau | 05f5047 | 2017-09-15 09:19:58 +0200 | [diff] [blame] | 1156 | |
Olivier Houchard | 859dc80 | 2019-08-08 15:47:21 +0200 | [diff] [blame] | 1157 | if (!MT_LIST_ISEMPTY(&fe->listener_queue) && |
Willy Tarreau | 05f5047 | 2017-09-15 09:19:58 +0200 | [diff] [blame] | 1158 | (!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] | 1159 | dequeue_proxy_listeners(fe); |
Willy Tarreau | 05f5047 | 2017-09-15 09:19:58 +0200 | [diff] [blame] | 1160 | } |
| 1161 | |
Willy Tarreau | f2cb169 | 2019-07-11 10:08:31 +0200 | [diff] [blame] | 1162 | /* Initializes the listener queues. Returns 0 on success, otherwise ERR_* flags */ |
| 1163 | static int listener_queue_init() |
| 1164 | { |
Willy Tarreau | a1d97f8 | 2019-12-10 11:18:41 +0100 | [diff] [blame] | 1165 | global_listener_queue_task = task_new(MAX_THREADS_MASK); |
| 1166 | if (!global_listener_queue_task) { |
| 1167 | ha_alert("Out of memory when initializing global listener queue\n"); |
| 1168 | return ERR_FATAL|ERR_ABORT; |
| 1169 | } |
| 1170 | /* very simple initialization, users will queue the task if needed */ |
| 1171 | global_listener_queue_task->context = NULL; /* not even a context! */ |
| 1172 | global_listener_queue_task->process = manage_global_listener_queue; |
| 1173 | |
Willy Tarreau | f2cb169 | 2019-07-11 10:08:31 +0200 | [diff] [blame] | 1174 | return 0; |
| 1175 | } |
| 1176 | |
| 1177 | static void listener_queue_deinit() |
| 1178 | { |
Willy Tarreau | a1d97f8 | 2019-12-10 11:18:41 +0100 | [diff] [blame] | 1179 | task_destroy(global_listener_queue_task); |
| 1180 | global_listener_queue_task = NULL; |
Willy Tarreau | f2cb169 | 2019-07-11 10:08:31 +0200 | [diff] [blame] | 1181 | } |
| 1182 | |
| 1183 | REGISTER_CONFIG_POSTPARSER("multi-threaded listener queue", listener_queue_init); |
| 1184 | REGISTER_POST_DEINIT(listener_queue_deinit); |
| 1185 | |
Willy Tarreau | a1d97f8 | 2019-12-10 11:18:41 +0100 | [diff] [blame] | 1186 | |
| 1187 | /* This is the global management task for listeners. It enables listeners waiting |
| 1188 | * for global resources when there are enough free resource, or at least once in |
| 1189 | * a while. It is designed to be called as a task. |
| 1190 | */ |
| 1191 | static struct task *manage_global_listener_queue(struct task *t, void *context, unsigned short state) |
| 1192 | { |
| 1193 | /* If there are still too many concurrent connections, let's wait for |
| 1194 | * some of them to go away. We don't need to re-arm the timer because |
| 1195 | * each of them will scan the queue anyway. |
| 1196 | */ |
| 1197 | if (unlikely(actconn >= global.maxconn)) |
| 1198 | goto out; |
| 1199 | |
| 1200 | /* We should periodically try to enable listeners waiting for a global |
| 1201 | * resource here, because it is possible, though very unlikely, that |
| 1202 | * they have been blocked by a temporary lack of global resource such |
| 1203 | * as a file descriptor or memory and that the temporary condition has |
| 1204 | * disappeared. |
| 1205 | */ |
| 1206 | dequeue_all_listeners(); |
| 1207 | |
| 1208 | out: |
| 1209 | t->expire = TICK_ETERNITY; |
| 1210 | task_queue(t); |
| 1211 | return t; |
| 1212 | } |
| 1213 | |
Willy Tarreau | 2698266 | 2012-09-12 23:17:10 +0200 | [diff] [blame] | 1214 | /* |
| 1215 | * Registers the bind keyword list <kwl> as a list of valid keywords for next |
| 1216 | * parsing sessions. |
| 1217 | */ |
| 1218 | void bind_register_keywords(struct bind_kw_list *kwl) |
| 1219 | { |
| 1220 | LIST_ADDQ(&bind_keywords.list, &kwl->list); |
| 1221 | } |
| 1222 | |
| 1223 | /* Return a pointer to the bind keyword <kw>, or NULL if not found. If the |
| 1224 | * keyword is found with a NULL ->parse() function, then an attempt is made to |
| 1225 | * find one with a valid ->parse() function. This way it is possible to declare |
| 1226 | * platform-dependant, known keywords as NULL, then only declare them as valid |
| 1227 | * if some options are met. Note that if the requested keyword contains an |
| 1228 | * opening parenthesis, everything from this point is ignored. |
| 1229 | */ |
| 1230 | struct bind_kw *bind_find_kw(const char *kw) |
| 1231 | { |
| 1232 | int index; |
| 1233 | const char *kwend; |
| 1234 | struct bind_kw_list *kwl; |
| 1235 | struct bind_kw *ret = NULL; |
| 1236 | |
| 1237 | kwend = strchr(kw, '('); |
| 1238 | if (!kwend) |
| 1239 | kwend = kw + strlen(kw); |
| 1240 | |
| 1241 | list_for_each_entry(kwl, &bind_keywords.list, list) { |
| 1242 | for (index = 0; kwl->kw[index].kw != NULL; index++) { |
| 1243 | if ((strncmp(kwl->kw[index].kw, kw, kwend - kw) == 0) && |
| 1244 | kwl->kw[index].kw[kwend-kw] == 0) { |
| 1245 | if (kwl->kw[index].parse) |
| 1246 | return &kwl->kw[index]; /* found it !*/ |
| 1247 | else |
| 1248 | ret = &kwl->kw[index]; /* may be OK */ |
| 1249 | } |
| 1250 | } |
| 1251 | } |
| 1252 | return ret; |
| 1253 | } |
| 1254 | |
Willy Tarreau | 8638f48 | 2012-09-18 18:01:17 +0200 | [diff] [blame] | 1255 | /* Dumps all registered "bind" keywords to the <out> string pointer. The |
| 1256 | * unsupported keywords are only dumped if their supported form was not |
| 1257 | * found. |
| 1258 | */ |
| 1259 | void bind_dump_kws(char **out) |
| 1260 | { |
| 1261 | struct bind_kw_list *kwl; |
| 1262 | int index; |
| 1263 | |
Christopher Faulet | 784063e | 2020-05-18 12:14:18 +0200 | [diff] [blame] | 1264 | if (!out) |
| 1265 | return; |
| 1266 | |
Willy Tarreau | 8638f48 | 2012-09-18 18:01:17 +0200 | [diff] [blame] | 1267 | *out = NULL; |
| 1268 | list_for_each_entry(kwl, &bind_keywords.list, list) { |
| 1269 | for (index = 0; kwl->kw[index].kw != NULL; index++) { |
| 1270 | if (kwl->kw[index].parse || |
| 1271 | bind_find_kw(kwl->kw[index].kw) == &kwl->kw[index]) { |
Willy Tarreau | 51fb765 | 2012-09-18 18:24:39 +0200 | [diff] [blame] | 1272 | memprintf(out, "%s[%4s] %s%s%s\n", *out ? *out : "", |
| 1273 | kwl->scope, |
Willy Tarreau | 8638f48 | 2012-09-18 18:01:17 +0200 | [diff] [blame] | 1274 | kwl->kw[index].kw, |
Willy Tarreau | 51fb765 | 2012-09-18 18:24:39 +0200 | [diff] [blame] | 1275 | kwl->kw[index].skip ? " <arg>" : "", |
| 1276 | kwl->kw[index].parse ? "" : " (not supported)"); |
Willy Tarreau | 8638f48 | 2012-09-18 18:01:17 +0200 | [diff] [blame] | 1277 | } |
| 1278 | } |
| 1279 | } |
| 1280 | } |
| 1281 | |
Willy Tarreau | 645513a | 2010-05-24 20:55:15 +0200 | [diff] [blame] | 1282 | /************************************************************************/ |
Willy Tarreau | 0ccb744 | 2013-01-07 22:54:17 +0100 | [diff] [blame] | 1283 | /* All supported sample and ACL keywords must be declared here. */ |
Willy Tarreau | 645513a | 2010-05-24 20:55:15 +0200 | [diff] [blame] | 1284 | /************************************************************************/ |
| 1285 | |
Willy Tarreau | a5e3756 | 2011-12-16 17:06:15 +0100 | [diff] [blame] | 1286 | /* 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] | 1287 | static int |
Thierry FOURNIER | 0786d05 | 2015-05-11 15:42:45 +0200 | [diff] [blame] | 1288 | 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] | 1289 | { |
Thierry FOURNIER | 8c542ca | 2015-08-19 09:00:18 +0200 | [diff] [blame] | 1290 | smp->data.type = SMP_T_SINT; |
Thierry FOURNIER | 136f9d3 | 2015-08-19 09:07:19 +0200 | [diff] [blame] | 1291 | smp->data.u.sint = smp->sess->listener->nbconn; |
Willy Tarreau | 645513a | 2010-05-24 20:55:15 +0200 | [diff] [blame] | 1292 | return 1; |
| 1293 | } |
| 1294 | |
Willy Tarreau | a5e3756 | 2011-12-16 17:06:15 +0100 | [diff] [blame] | 1295 | /* set temp integer to the id of the socket (listener) */ |
Willy Tarreau | 645513a | 2010-05-24 20:55:15 +0200 | [diff] [blame] | 1296 | static int |
Thierry FOURNIER | 0786d05 | 2015-05-11 15:42:45 +0200 | [diff] [blame] | 1297 | 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] | 1298 | { |
Thierry FOURNIER | 8c542ca | 2015-08-19 09:00:18 +0200 | [diff] [blame] | 1299 | smp->data.type = SMP_T_SINT; |
Thierry FOURNIER | 136f9d3 | 2015-08-19 09:07:19 +0200 | [diff] [blame] | 1300 | smp->data.u.sint = smp->sess->listener->luid; |
Willy Tarreau | 645513a | 2010-05-24 20:55:15 +0200 | [diff] [blame] | 1301 | return 1; |
| 1302 | } |
Jerome Magnin | eb421b2 | 2020-03-27 22:08:40 +0100 | [diff] [blame] | 1303 | static int |
| 1304 | smp_fetch_so_name(const struct arg *args, struct sample *smp, const char *kw, void *private) |
| 1305 | { |
| 1306 | smp->data.u.str.area = smp->sess->listener->name; |
| 1307 | if (!smp->data.u.str.area) |
| 1308 | return 0; |
| 1309 | |
| 1310 | smp->data.type = SMP_T_STR; |
| 1311 | smp->flags = SMP_F_CONST; |
| 1312 | smp->data.u.str.data = strlen(smp->data.u.str.area); |
| 1313 | return 1; |
| 1314 | } |
Willy Tarreau | 645513a | 2010-05-24 20:55:15 +0200 | [diff] [blame] | 1315 | |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1316 | /* parse the "accept-proxy" bind keyword */ |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1317 | 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] | 1318 | { |
| 1319 | struct listener *l; |
| 1320 | |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1321 | list_for_each_entry(l, &conf->listeners, by_bind) |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1322 | l->options |= LI_O_ACC_PROXY; |
| 1323 | |
| 1324 | return 0; |
| 1325 | } |
| 1326 | |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 1327 | /* parse the "accept-netscaler-cip" bind keyword */ |
| 1328 | static int bind_parse_accept_netscaler_cip(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err) |
| 1329 | { |
| 1330 | struct listener *l; |
| 1331 | uint32_t val; |
| 1332 | |
| 1333 | if (!*args[cur_arg + 1]) { |
| 1334 | memprintf(err, "'%s' : missing value", args[cur_arg]); |
| 1335 | return ERR_ALERT | ERR_FATAL; |
| 1336 | } |
| 1337 | |
| 1338 | val = atol(args[cur_arg + 1]); |
| 1339 | if (val <= 0) { |
Willy Tarreau | e2711c7 | 2019-02-27 15:39:41 +0100 | [diff] [blame] | 1340 | 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] | 1341 | return ERR_ALERT | ERR_FATAL; |
| 1342 | } |
| 1343 | |
| 1344 | list_for_each_entry(l, &conf->listeners, by_bind) { |
| 1345 | l->options |= LI_O_ACC_CIP; |
| 1346 | conf->ns_cip_magic = val; |
| 1347 | } |
| 1348 | |
| 1349 | return 0; |
| 1350 | } |
| 1351 | |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1352 | /* parse the "backlog" bind keyword */ |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1353 | 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] | 1354 | { |
| 1355 | struct listener *l; |
| 1356 | int val; |
| 1357 | |
| 1358 | if (!*args[cur_arg + 1]) { |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1359 | memprintf(err, "'%s' : missing value", args[cur_arg]); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1360 | return ERR_ALERT | ERR_FATAL; |
| 1361 | } |
| 1362 | |
| 1363 | val = atol(args[cur_arg + 1]); |
Willy Tarreau | e2711c7 | 2019-02-27 15:39:41 +0100 | [diff] [blame] | 1364 | if (val < 0) { |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1365 | 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] | 1366 | return ERR_ALERT | ERR_FATAL; |
| 1367 | } |
| 1368 | |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1369 | list_for_each_entry(l, &conf->listeners, by_bind) |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1370 | l->backlog = val; |
| 1371 | |
| 1372 | return 0; |
| 1373 | } |
| 1374 | |
| 1375 | /* parse the "id" bind keyword */ |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1376 | 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] | 1377 | { |
| 1378 | struct eb32_node *node; |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1379 | struct listener *l, *new; |
Thierry Fournier | e7fe8eb | 2016-02-26 08:45:58 +0100 | [diff] [blame] | 1380 | char *error; |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1381 | |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1382 | if (conf->listeners.n != conf->listeners.p) { |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1383 | 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] | 1384 | return ERR_ALERT | ERR_FATAL; |
| 1385 | } |
| 1386 | |
| 1387 | if (!*args[cur_arg + 1]) { |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1388 | memprintf(err, "'%s' : expects an integer argument", args[cur_arg]); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1389 | return ERR_ALERT | ERR_FATAL; |
| 1390 | } |
| 1391 | |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1392 | new = LIST_NEXT(&conf->listeners, struct listener *, by_bind); |
Thierry Fournier | e7fe8eb | 2016-02-26 08:45:58 +0100 | [diff] [blame] | 1393 | new->luid = strtol(args[cur_arg + 1], &error, 10); |
| 1394 | if (*error != '\0') { |
| 1395 | memprintf(err, "'%s' : expects an integer argument, found '%s'", args[cur_arg], args[cur_arg + 1]); |
| 1396 | return ERR_ALERT | ERR_FATAL; |
| 1397 | } |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1398 | new->conf.id.key = new->luid; |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1399 | |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1400 | if (new->luid <= 0) { |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1401 | memprintf(err, "'%s' : custom id has to be > 0", args[cur_arg]); |
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 | node = eb32_lookup(&px->conf.used_listener_id, new->luid); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1406 | if (node) { |
| 1407 | l = container_of(node, struct listener, conf.id); |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1408 | memprintf(err, "'%s' : custom id %d already used at %s:%d ('bind %s')", |
| 1409 | args[cur_arg], l->luid, l->bind_conf->file, l->bind_conf->line, |
| 1410 | l->bind_conf->arg); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1411 | return ERR_ALERT | ERR_FATAL; |
| 1412 | } |
| 1413 | |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1414 | eb32_insert(&px->conf.used_listener_id, &new->conf.id); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1415 | return 0; |
| 1416 | } |
| 1417 | |
| 1418 | /* parse the "maxconn" bind keyword */ |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1419 | 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] | 1420 | { |
| 1421 | struct listener *l; |
| 1422 | int val; |
| 1423 | |
| 1424 | if (!*args[cur_arg + 1]) { |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1425 | memprintf(err, "'%s' : missing value", args[cur_arg]); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1426 | return ERR_ALERT | ERR_FATAL; |
| 1427 | } |
| 1428 | |
| 1429 | val = atol(args[cur_arg + 1]); |
Willy Tarreau | a8cf66b | 2019-02-27 16:49:00 +0100 | [diff] [blame] | 1430 | if (val < 0) { |
| 1431 | 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] | 1432 | return ERR_ALERT | ERR_FATAL; |
| 1433 | } |
| 1434 | |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1435 | list_for_each_entry(l, &conf->listeners, by_bind) |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1436 | l->maxconn = val; |
| 1437 | |
| 1438 | return 0; |
| 1439 | } |
| 1440 | |
| 1441 | /* parse the "name" bind keyword */ |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1442 | 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] | 1443 | { |
| 1444 | struct listener *l; |
| 1445 | |
| 1446 | if (!*args[cur_arg + 1]) { |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1447 | memprintf(err, "'%s' : missing name", args[cur_arg]); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1448 | return ERR_ALERT | ERR_FATAL; |
| 1449 | } |
| 1450 | |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1451 | list_for_each_entry(l, &conf->listeners, by_bind) |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1452 | l->name = strdup(args[cur_arg + 1]); |
| 1453 | |
| 1454 | return 0; |
| 1455 | } |
| 1456 | |
| 1457 | /* parse the "nice" bind keyword */ |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1458 | 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] | 1459 | { |
| 1460 | struct listener *l; |
| 1461 | int val; |
| 1462 | |
| 1463 | if (!*args[cur_arg + 1]) { |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1464 | memprintf(err, "'%s' : missing value", args[cur_arg]); |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1465 | return ERR_ALERT | ERR_FATAL; |
| 1466 | } |
| 1467 | |
| 1468 | val = atol(args[cur_arg + 1]); |
| 1469 | if (val < -1024 || val > 1024) { |
Willy Tarreau | eb6cead | 2012-09-20 19:43:14 +0200 | [diff] [blame] | 1470 | 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] | 1471 | return ERR_ALERT | ERR_FATAL; |
| 1472 | } |
| 1473 | |
Willy Tarreau | 4348fad | 2012-09-20 16:48:07 +0200 | [diff] [blame] | 1474 | list_for_each_entry(l, &conf->listeners, by_bind) |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1475 | l->nice = val; |
| 1476 | |
| 1477 | return 0; |
| 1478 | } |
| 1479 | |
Willy Tarreau | 6ae1ba6 | 2014-05-07 19:01:58 +0200 | [diff] [blame] | 1480 | /* parse the "process" bind keyword */ |
| 1481 | static int bind_parse_process(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err) |
| 1482 | { |
Christopher Faulet | c644fa9 | 2017-11-23 22:44:11 +0100 | [diff] [blame] | 1483 | char *slash; |
| 1484 | unsigned long proc = 0, thread = 0; |
Willy Tarreau | 6ae1ba6 | 2014-05-07 19:01:58 +0200 | [diff] [blame] | 1485 | |
Christopher Faulet | c644fa9 | 2017-11-23 22:44:11 +0100 | [diff] [blame] | 1486 | if ((slash = strchr(args[cur_arg + 1], '/')) != NULL) |
| 1487 | *slash = 0; |
| 1488 | |
Willy Tarreau | ff9c914 | 2019-02-07 10:39:36 +0100 | [diff] [blame] | 1489 | 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] | 1490 | memprintf(err, "'%s' : %s", args[cur_arg], *err); |
Willy Tarreau | 6ae1ba6 | 2014-05-07 19:01:58 +0200 | [diff] [blame] | 1491 | return ERR_ALERT | ERR_FATAL; |
| 1492 | } |
| 1493 | |
Christopher Faulet | c644fa9 | 2017-11-23 22:44:11 +0100 | [diff] [blame] | 1494 | if (slash) { |
Willy Tarreau | c9a82e4 | 2019-01-26 13:25:14 +0100 | [diff] [blame] | 1495 | if (parse_process_number(slash+1, &thread, MAX_THREADS, NULL, err)) { |
Christopher Faulet | c644fa9 | 2017-11-23 22:44:11 +0100 | [diff] [blame] | 1496 | memprintf(err, "'%s' : %s", args[cur_arg], *err); |
| 1497 | return ERR_ALERT | ERR_FATAL; |
| 1498 | } |
| 1499 | *slash = '/'; |
| 1500 | } |
| 1501 | |
Willy Tarreau | e26993c | 2020-09-03 07:18:55 +0200 | [diff] [blame] | 1502 | conf->settings.bind_proc |= proc; |
| 1503 | conf->settings.bind_thread |= thread; |
Willy Tarreau | 6ae1ba6 | 2014-05-07 19:01:58 +0200 | [diff] [blame] | 1504 | return 0; |
| 1505 | } |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1506 | |
Christopher Faulet | a717b99 | 2018-04-10 14:43:00 +0200 | [diff] [blame] | 1507 | /* parse the "proto" bind keyword */ |
| 1508 | static int bind_parse_proto(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err) |
| 1509 | { |
| 1510 | struct ist proto; |
| 1511 | |
| 1512 | if (!*args[cur_arg + 1]) { |
| 1513 | memprintf(err, "'%s' : missing value", args[cur_arg]); |
| 1514 | return ERR_ALERT | ERR_FATAL; |
| 1515 | } |
| 1516 | |
| 1517 | proto = ist2(args[cur_arg + 1], strlen(args[cur_arg + 1])); |
| 1518 | conf->mux_proto = get_mux_proto(proto); |
| 1519 | if (!conf->mux_proto) { |
| 1520 | memprintf(err, "'%s' : unknown MUX protocol '%s'", args[cur_arg], args[cur_arg+1]); |
| 1521 | return ERR_ALERT | ERR_FATAL; |
| 1522 | } |
Christopher Faulet | a717b99 | 2018-04-10 14:43:00 +0200 | [diff] [blame] | 1523 | return 0; |
| 1524 | } |
| 1525 | |
Willy Tarreau | 7ac908b | 2019-02-27 12:02:18 +0100 | [diff] [blame] | 1526 | /* config parser for global "tune.listener.multi-queue", accepts "on" or "off" */ |
| 1527 | static int cfg_parse_tune_listener_mq(char **args, int section_type, struct proxy *curpx, |
| 1528 | struct proxy *defpx, const char *file, int line, |
| 1529 | char **err) |
| 1530 | { |
| 1531 | if (too_many_args(1, args, err, NULL)) |
| 1532 | return -1; |
| 1533 | |
| 1534 | if (strcmp(args[1], "on") == 0) |
| 1535 | global.tune.options |= GTUNE_LISTENER_MQ; |
| 1536 | else if (strcmp(args[1], "off") == 0) |
| 1537 | global.tune.options &= ~GTUNE_LISTENER_MQ; |
| 1538 | else { |
| 1539 | memprintf(err, "'%s' expects either 'on' or 'off' but got '%s'.", args[0], args[1]); |
| 1540 | return -1; |
| 1541 | } |
| 1542 | return 0; |
| 1543 | } |
| 1544 | |
Willy Tarreau | 61612d4 | 2012-04-19 18:42:05 +0200 | [diff] [blame] | 1545 | /* Note: must not be declared <const> as its list will be overwritten. |
| 1546 | * Please take care of keeping this list alphabetically sorted. |
| 1547 | */ |
Willy Tarreau | dc13c11 | 2013-06-21 23:16:39 +0200 | [diff] [blame] | 1548 | static struct sample_fetch_kw_list smp_kws = {ILH, { |
Thierry FOURNIER | 07ee64e | 2015-07-06 23:43:03 +0200 | [diff] [blame] | 1549 | { "dst_conn", smp_fetch_dconn, 0, NULL, SMP_T_SINT, SMP_USE_FTEND, }, |
| 1550 | { "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] | 1551 | { "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] | 1552 | { /* END */ }, |
| 1553 | }}; |
| 1554 | |
Willy Tarreau | 0108d90 | 2018-11-25 19:14:37 +0100 | [diff] [blame] | 1555 | INITCALL1(STG_REGISTER, sample_register_fetches, &smp_kws); |
| 1556 | |
Willy Tarreau | 0ccb744 | 2013-01-07 22:54:17 +0100 | [diff] [blame] | 1557 | /* Note: must not be declared <const> as its list will be overwritten. |
| 1558 | * Please take care of keeping this list alphabetically sorted. |
| 1559 | */ |
Willy Tarreau | dc13c11 | 2013-06-21 23:16:39 +0200 | [diff] [blame] | 1560 | static struct acl_kw_list acl_kws = {ILH, { |
Willy Tarreau | 0ccb744 | 2013-01-07 22:54:17 +0100 | [diff] [blame] | 1561 | { /* END */ }, |
Willy Tarreau | 645513a | 2010-05-24 20:55:15 +0200 | [diff] [blame] | 1562 | }}; |
| 1563 | |
Willy Tarreau | 0108d90 | 2018-11-25 19:14:37 +0100 | [diff] [blame] | 1564 | INITCALL1(STG_REGISTER, acl_register_keywords, &acl_kws); |
| 1565 | |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1566 | /* Note: must not be declared <const> as its list will be overwritten. |
| 1567 | * Please take care of keeping this list alphabetically sorted, doing so helps |
| 1568 | * all code contributors. |
| 1569 | * Optional keywords are also declared with a NULL ->parse() function so that |
| 1570 | * the config parser can report an appropriate error when a known keyword was |
| 1571 | * not enabled. |
| 1572 | */ |
Willy Tarreau | 51fb765 | 2012-09-18 18:24:39 +0200 | [diff] [blame] | 1573 | static struct bind_kw_list bind_kws = { "ALL", { }, { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 1574 | { "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] | 1575 | { "accept-proxy", bind_parse_accept_proxy, 0 }, /* enable PROXY protocol */ |
| 1576 | { "backlog", bind_parse_backlog, 1 }, /* set backlog of listening socket */ |
| 1577 | { "id", bind_parse_id, 1 }, /* set id of listening socket */ |
| 1578 | { "maxconn", bind_parse_maxconn, 1 }, /* set maxconn of listening socket */ |
| 1579 | { "name", bind_parse_name, 1 }, /* set name of listening socket */ |
| 1580 | { "nice", bind_parse_nice, 1 }, /* set nice of listening socket */ |
Willy Tarreau | 6ae1ba6 | 2014-05-07 19:01:58 +0200 | [diff] [blame] | 1581 | { "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] | 1582 | { "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] | 1583 | { /* END */ }, |
Willy Tarreau | 3dcc341 | 2012-09-18 17:17:28 +0200 | [diff] [blame] | 1584 | }}; |
| 1585 | |
Willy Tarreau | 0108d90 | 2018-11-25 19:14:37 +0100 | [diff] [blame] | 1586 | INITCALL1(STG_REGISTER, bind_register_keywords, &bind_kws); |
| 1587 | |
Willy Tarreau | 7ac908b | 2019-02-27 12:02:18 +0100 | [diff] [blame] | 1588 | /* config keyword parsers */ |
| 1589 | static struct cfg_kw_list cfg_kws = {ILH, { |
| 1590 | { CFG_GLOBAL, "tune.listener.multi-queue", cfg_parse_tune_listener_mq }, |
| 1591 | { 0, NULL, NULL } |
| 1592 | }}; |
| 1593 | |
| 1594 | INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws); |
| 1595 | |
Willy Tarreau | 645513a | 2010-05-24 20:55:15 +0200 | [diff] [blame] | 1596 | /* |
| 1597 | * Local variables: |
| 1598 | * c-indent-level: 8 |
| 1599 | * c-basic-offset: 8 |
| 1600 | * End: |
| 1601 | */ |