blob: 46d834f740cbfdbde59634fdf265263ddc5e6ac3 [file] [log] [blame]
Willy Tarreaubaaee002006-06-26 02:48:02 +02001/*
2 * Backend variables and functions.
3 *
Willy Tarreau1a7eca12013-01-07 22:38:03 +01004 * Copyright 2000-2013 Willy Tarreau <w@1wt.eu>
Willy Tarreaubaaee002006-06-26 02:48:02 +02005 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
13#include <errno.h>
14#include <fcntl.h>
15#include <stdio.h>
16#include <stdlib.h>
17#include <syslog.h>
Willy Tarreauf19cf372006-11-14 15:40:51 +010018#include <string.h>
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +020019#include <ctype.h>
Dmitry Sivachenkocaf58982009-08-24 15:11:06 +040020#include <sys/types.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020021
Willy Tarreaudcc048a2020-06-04 19:11:43 +020022#include <haproxy/acl.h>
Willy Tarreau4c7e4b72020-05-27 12:58:42 +020023#include <haproxy/api.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020024#include <haproxy/arg.h>
25#include <haproxy/backend.h>
Willy Tarreauf1d32c42020-06-04 21:07:02 +020026#include <haproxy/channel.h>
Willy Tarreau4aa573d2020-06-04 18:21:56 +020027#include <haproxy/check.h>
Willy Tarreau762d7a52020-06-04 11:23:07 +020028#include <haproxy/frontend.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020029#include <haproxy/global.h>
Willy Tarreau8d366972020-05-27 16:10:29 +020030#include <haproxy/hash.h>
Willy Tarreaucd72d8c2020-06-02 19:11:26 +020031#include <haproxy/http.h>
Willy Tarreauc2b1ff02020-06-04 21:21:03 +020032#include <haproxy/http_ana.h>
Willy Tarreau87735332020-06-04 09:08:41 +020033#include <haproxy/http_htx.h>
Willy Tarreau16f958c2020-06-03 08:44:35 +020034#include <haproxy/htx.h>
Willy Tarreaufbe8da32020-06-04 14:34:27 +020035#include <haproxy/lb_chash.h>
Willy Tarreaub5fc3bf2020-06-04 14:37:38 +020036#include <haproxy/lb_fas.h>
Willy Tarreau02549412020-06-04 14:41:04 +020037#include <haproxy/lb_fwlc.h>
Willy Tarreau546ba422020-06-04 14:45:03 +020038#include <haproxy/lb_fwrr.h>
Willy Tarreau28671592020-06-04 20:22:59 +020039#include <haproxy/lb_map.h>
Willy Tarreauaeed4a82020-06-04 22:01:04 +020040#include <haproxy/log.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020041#include <haproxy/namespace.h>
Willy Tarreau8efbdfb2020-06-04 11:29:21 +020042#include <haproxy/obj_type.h>
Willy Tarreau469509b2020-06-04 15:13:30 +020043#include <haproxy/payload.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020044#include <haproxy/proto_tcp.h>
45#include <haproxy/protocol.h>
Willy Tarreaua264d962020-06-04 22:29:18 +020046#include <haproxy/proxy.h>
Willy Tarreaua55c4542020-06-04 22:59:39 +020047#include <haproxy/queue.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020048#include <haproxy/sample.h>
Willy Tarreau1e56f922020-06-04 23:20:13 +020049#include <haproxy/server.h>
Willy Tarreau48d25b32020-06-04 18:58:52 +020050#include <haproxy/session.h>
Willy Tarreau209108d2020-06-04 20:30:20 +020051#include <haproxy/ssl_sock.h>
Willy Tarreaudfd3de82020-06-04 23:46:14 +020052#include <haproxy/stream.h>
Willy Tarreau5e539c92020-06-04 20:45:39 +020053#include <haproxy/stream_interface.h>
Willy Tarreaucea0e1b2020-06-04 17:25:40 +020054#include <haproxy/task.h>
Willy Tarreauc2f7c582020-06-02 18:15:32 +020055#include <haproxy/ticks.h>
Willy Tarreau92b4f132020-06-01 11:05:15 +020056#include <haproxy/time.h>
Willy Tarreaudfd3de82020-06-04 23:46:14 +020057#include <haproxy/trace.h>
Willy Tarreau732eac42015-07-09 11:40:25 +020058
Christopher Fauleteea8fc72019-11-05 16:18:10 +010059#define TRACE_SOURCE &trace_strm
60
Bhaskar Maddalaa20cb852014-02-03 16:26:46 -050061int be_lastsession(const struct proxy *be)
62{
63 if (be->be_counters.last_sess)
64 return now.tv_sec - be->be_counters.last_sess;
65
66 return -1;
67}
68
Bhaskar98634f02013-10-29 23:30:51 -040069/* helper function to invoke the correct hash method */
Dan Dubovikbd57a9f2014-07-08 08:51:03 -070070static unsigned int gen_hash(const struct proxy* px, const char* key, unsigned long len)
Bhaskar98634f02013-10-29 23:30:51 -040071{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -070072 unsigned int hash;
Bhaskar98634f02013-10-29 23:30:51 -040073
74 switch (px->lbprm.algo & BE_LB_HASH_FUNC) {
75 case BE_LB_HFCN_DJB2:
76 hash = hash_djb2(key, len);
77 break;
Willy Tarreaua0f42712013-11-14 14:30:35 +010078 case BE_LB_HFCN_WT6:
79 hash = hash_wt6(key, len);
80 break;
Willy Tarreau324f07f2015-01-20 19:44:50 +010081 case BE_LB_HFCN_CRC32:
82 hash = hash_crc32(key, len);
83 break;
Bhaskar98634f02013-10-29 23:30:51 -040084 case BE_LB_HFCN_SDBM:
85 /* this is the default hash function */
86 default:
87 hash = hash_sdbm(key, len);
88 break;
89 }
90
91 return hash;
92}
93
Willy Tarreaubaaee002006-06-26 02:48:02 +020094/*
95 * This function recounts the number of usable active and backup servers for
96 * proxy <p>. These numbers are returned into the p->srv_act and p->srv_bck.
Willy Tarreaub625a082007-11-26 01:15:43 +010097 * This function also recomputes the total active and backup weights. However,
Willy Tarreauf4cca452008-03-08 21:42:54 +010098 * it does not update tot_weight nor tot_used. Use update_backend_weight() for
Willy Tarreaub625a082007-11-26 01:15:43 +010099 * this.
Emeric Brun52a91d32017-08-31 14:41:55 +0200100 * This functions is designed to be called before server's weight and state
101 * commit so it uses 'next' weight and states values.
Christopher Faulet5b517552017-06-09 14:17:53 +0200102 *
103 * threads: this is the caller responsibility to lock data. For now, this
104 * function is called from lb modules, so it should be ok. But if you need to
105 * call it from another place, be careful (and update this comment).
Willy Tarreaubaaee002006-06-26 02:48:02 +0200106 */
Willy Tarreauc5d9c802009-10-01 09:17:05 +0200107void recount_servers(struct proxy *px)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200108{
109 struct server *srv;
110
Willy Tarreau20697042007-11-15 23:26:18 +0100111 px->srv_act = px->srv_bck = 0;
112 px->lbprm.tot_wact = px->lbprm.tot_wbck = 0;
Willy Tarreaub625a082007-11-26 01:15:43 +0100113 px->lbprm.fbck = NULL;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200114 for (srv = px->srv; srv != NULL; srv = srv->next) {
Emeric Brun52a91d32017-08-31 14:41:55 +0200115 if (!srv_willbe_usable(srv))
Willy Tarreaub625a082007-11-26 01:15:43 +0100116 continue;
117
Willy Tarreauc93cd162014-05-13 15:54:22 +0200118 if (srv->flags & SRV_F_BACKUP) {
Willy Tarreaub625a082007-11-26 01:15:43 +0100119 if (!px->srv_bck &&
Willy Tarreauf4cca452008-03-08 21:42:54 +0100120 !(px->options & PR_O_USE_ALL_BK))
Willy Tarreaub625a082007-11-26 01:15:43 +0100121 px->lbprm.fbck = srv;
122 px->srv_bck++;
Andrew Rodland13d5ebb2016-10-25 12:49:45 -0400123 srv->cumulative_weight = px->lbprm.tot_wbck;
Emeric Brun52a91d32017-08-31 14:41:55 +0200124 px->lbprm.tot_wbck += srv->next_eweight;
Willy Tarreaub625a082007-11-26 01:15:43 +0100125 } else {
126 px->srv_act++;
Andrew Rodland13d5ebb2016-10-25 12:49:45 -0400127 srv->cumulative_weight = px->lbprm.tot_wact;
Emeric Brun52a91d32017-08-31 14:41:55 +0200128 px->lbprm.tot_wact += srv->next_eweight;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200129 }
130 }
Willy Tarreaub625a082007-11-26 01:15:43 +0100131}
Willy Tarreau20697042007-11-15 23:26:18 +0100132
Willy Tarreaub625a082007-11-26 01:15:43 +0100133/* This function simply updates the backend's tot_weight and tot_used values
134 * after servers weights have been updated. It is designed to be used after
135 * recount_servers() or equivalent.
Christopher Faulet5b517552017-06-09 14:17:53 +0200136 *
137 * threads: this is the caller responsibility to lock data. For now, this
138 * function is called from lb modules, so it should be ok. But if you need to
139 * call it from another place, be careful (and update this comment).
Willy Tarreaub625a082007-11-26 01:15:43 +0100140 */
Willy Tarreauc5d9c802009-10-01 09:17:05 +0200141void update_backend_weight(struct proxy *px)
Willy Tarreaub625a082007-11-26 01:15:43 +0100142{
Willy Tarreau20697042007-11-15 23:26:18 +0100143 if (px->srv_act) {
144 px->lbprm.tot_weight = px->lbprm.tot_wact;
145 px->lbprm.tot_used = px->srv_act;
146 }
Willy Tarreaub625a082007-11-26 01:15:43 +0100147 else if (px->lbprm.fbck) {
148 /* use only the first backup server */
Emeric Brun52a91d32017-08-31 14:41:55 +0200149 px->lbprm.tot_weight = px->lbprm.fbck->next_eweight;
Willy Tarreaub625a082007-11-26 01:15:43 +0100150 px->lbprm.tot_used = 1;
Willy Tarreau20697042007-11-15 23:26:18 +0100151 }
152 else {
Willy Tarreaub625a082007-11-26 01:15:43 +0100153 px->lbprm.tot_weight = px->lbprm.tot_wbck;
154 px->lbprm.tot_used = px->srv_bck;
Willy Tarreau20697042007-11-15 23:26:18 +0100155 }
Willy Tarreaub625a082007-11-26 01:15:43 +0100156}
157
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200158/*
159 * This function tries to find a running server for the proxy <px> following
160 * the source hash method. Depending on the number of active/backup servers,
161 * it will either look for active servers, or for backup servers.
162 * If any server is found, it will be returned. If no valid server is found,
163 * NULL is returned.
164 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100165static struct server *get_server_sh(struct proxy *px, const char *addr, int len, const struct server *avoid)
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200166{
167 unsigned int h, l;
168
169 if (px->lbprm.tot_weight == 0)
170 return NULL;
171
172 l = h = 0;
173
174 /* note: we won't hash if there's only one server left */
175 if (px->lbprm.tot_used == 1)
176 goto hash_done;
177
178 while ((l + sizeof (int)) <= len) {
179 h ^= ntohl(*(unsigned int *)(&addr[l]));
180 l += sizeof (int);
181 }
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500182 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100183 h = full_hash(h);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200184 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100185 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100186 return chash_get_server_hash(px, h, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200187 else
188 return map_get_server_hash(px, h);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200189}
190
191/*
192 * This function tries to find a running server for the proxy <px> following
193 * the URI hash method. In order to optimize cache hits, the hash computation
194 * ends at the question mark. Depending on the number of active/backup servers,
195 * it will either look for active servers, or for backup servers.
196 * If any server is found, it will be returned. If no valid server is found,
Willy Tarreaua9a72492019-01-14 16:14:15 +0100197 * NULL is returned. The lbprm.arg_opt{1,2,3} values correspond respectively to
198 * the "whole" optional argument (boolean), the "len" argument (numeric) and
199 * the "depth" argument (numeric).
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200200 *
201 * This code was contributed by Guillaume Dallaire, who also selected this hash
202 * algorithm out of a tens because it gave him the best results.
203 *
204 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100205static struct server *get_server_uh(struct proxy *px, char *uri, int uri_len, const struct server *avoid)
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200206{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700207 unsigned int hash = 0;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200208 int c;
209 int slashes = 0;
Bhaskar98634f02013-10-29 23:30:51 -0400210 const char *start, *end;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200211
212 if (px->lbprm.tot_weight == 0)
213 return NULL;
214
215 /* note: we won't hash if there's only one server left */
216 if (px->lbprm.tot_used == 1)
217 goto hash_done;
218
Willy Tarreaua9a72492019-01-14 16:14:15 +0100219 if (px->lbprm.arg_opt2) // "len"
220 uri_len = MIN(uri_len, px->lbprm.arg_opt2);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200221
Bhaskar98634f02013-10-29 23:30:51 -0400222 start = end = uri;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200223 while (uri_len--) {
Willy Tarreaufad4ffc2014-10-17 12:11:50 +0200224 c = *end;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200225 if (c == '/') {
226 slashes++;
Willy Tarreaua9a72492019-01-14 16:14:15 +0100227 if (slashes == px->lbprm.arg_opt3) /* depth+1 */
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200228 break;
229 }
Willy Tarreaua9a72492019-01-14 16:14:15 +0100230 else if (c == '?' && !px->lbprm.arg_opt1) // "whole"
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200231 break;
Willy Tarreaufad4ffc2014-10-17 12:11:50 +0200232 end++;
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200233 }
Bhaskar98634f02013-10-29 23:30:51 -0400234
235 hash = gen_hash(px, start, (end - start));
236
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500237 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100238 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200239 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100240 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100241 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200242 else
243 return map_get_server_hash(px, hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200244}
245
Christopher Faulet5b517552017-06-09 14:17:53 +0200246/*
Willy Tarreau01732802007-11-01 22:48:15 +0100247 * This function tries to find a running server for the proxy <px> following
248 * the URL parameter hash method. It looks for a specific parameter in the
249 * URL and hashes it to compute the server ID. This is useful to optimize
250 * performance by avoiding bounces between servers in contexts where sessions
251 * are shared but cookies are not usable. If the parameter is not found, NULL
252 * is returned. If any server is found, it will be returned. If no valid server
253 * is found, NULL is returned.
Willy Tarreau01732802007-11-01 22:48:15 +0100254 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100255static struct server *get_server_ph(struct proxy *px, const char *uri, int uri_len, const struct server *avoid)
Willy Tarreau01732802007-11-01 22:48:15 +0100256{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700257 unsigned int hash = 0;
Bhaskar98634f02013-10-29 23:30:51 -0400258 const char *start, *end;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200259 const char *p;
260 const char *params;
Willy Tarreau01732802007-11-01 22:48:15 +0100261 int plen;
262
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200263 /* when tot_weight is 0 then so is srv_count */
Willy Tarreau20697042007-11-15 23:26:18 +0100264 if (px->lbprm.tot_weight == 0)
Willy Tarreau01732802007-11-01 22:48:15 +0100265 return NULL;
266
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200267 if ((p = memchr(uri, '?', uri_len)) == NULL)
268 return NULL;
269
Willy Tarreau01732802007-11-01 22:48:15 +0100270 p++;
271
272 uri_len -= (p - uri);
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100273 plen = px->lbprm.arg_len;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200274 params = p;
Willy Tarreau01732802007-11-01 22:48:15 +0100275
276 while (uri_len > plen) {
277 /* Look for the parameter name followed by an equal symbol */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200278 if (params[plen] == '=') {
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100279 if (memcmp(params, px->lbprm.arg_str, plen) == 0) {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200280 /* OK, we have the parameter here at <params>, and
Willy Tarreau01732802007-11-01 22:48:15 +0100281 * the value after the equal sign, at <p>
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200282 * skip the equal symbol
Willy Tarreau01732802007-11-01 22:48:15 +0100283 */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200284 p += plen + 1;
Bhaskar98634f02013-10-29 23:30:51 -0400285 start = end = p;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200286 uri_len -= plen + 1;
287
Bhaskar98634f02013-10-29 23:30:51 -0400288 while (uri_len && *end != '&') {
Willy Tarreau01732802007-11-01 22:48:15 +0100289 uri_len--;
Bhaskar98634f02013-10-29 23:30:51 -0400290 end++;
Willy Tarreau01732802007-11-01 22:48:15 +0100291 }
Bhaskar98634f02013-10-29 23:30:51 -0400292 hash = gen_hash(px, start, (end - start));
293
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500294 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100295 hash = full_hash(hash);
Bhaskar98634f02013-10-29 23:30:51 -0400296
Willy Tarreau6c30be52019-01-14 17:07:39 +0100297 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100298 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200299 else
300 return map_get_server_hash(px, hash);
Willy Tarreau01732802007-11-01 22:48:15 +0100301 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200302 }
303 /* skip to next parameter */
304 p = memchr(params, '&', uri_len);
305 if (!p)
306 return NULL;
307 p++;
308 uri_len -= (p - params);
309 params = p;
310 }
311 return NULL;
312}
313
314/*
315 * this does the same as the previous server_ph, but check the body contents
316 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100317static struct server *get_server_ph_post(struct stream *s, const struct server *avoid)
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200318{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700319 unsigned int hash = 0;
Willy Tarreau22ec1ea2014-11-27 20:45:39 +0100320 struct channel *req = &s->req;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200321 struct proxy *px = s->be;
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200322 struct htx *htx = htxbuf(&req->buf);
323 struct htx_blk *blk;
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100324 unsigned int plen = px->lbprm.arg_len;
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100325 unsigned long len;
326 const char *params, *p, *start, *end;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200327
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100328 if (px->lbprm.tot_weight == 0)
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200329 return NULL;
330
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200331 p = params = NULL;
332 len = 0;
333 for (blk = htx_get_first_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
334 enum htx_blk_type type = htx_get_blk_type(blk);
335 struct ist v;
Willy Tarreauf69d4ff2015-05-02 00:05:47 +0200336
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200337 if (type != HTX_BLK_DATA)
338 continue;
339 v = htx_get_blk_value(htx, blk);
340 p = params = v.ptr;
341 len = v.len;
342 break;
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100343 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200344
345 while (len > plen) {
346 /* Look for the parameter name followed by an equal symbol */
347 if (params[plen] == '=') {
Willy Tarreau4c03d1c2019-01-14 15:23:54 +0100348 if (memcmp(params, px->lbprm.arg_str, plen) == 0) {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200349 /* OK, we have the parameter here at <params>, and
350 * the value after the equal sign, at <p>
351 * skip the equal symbol
352 */
353 p += plen + 1;
Bhaskar98634f02013-10-29 23:30:51 -0400354 start = end = p;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200355 len -= plen + 1;
356
Bhaskar98634f02013-10-29 23:30:51 -0400357 while (len && *end != '&') {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200358 if (unlikely(!HTTP_IS_TOKEN(*p))) {
Willy Tarreau157dd632009-12-06 19:18:09 +0100359 /* if in a POST, body must be URI encoded or it's not a URI.
Bhaskar98634f02013-10-29 23:30:51 -0400360 * Do not interpret any possible binary data as a parameter.
Willy Tarreau157dd632009-12-06 19:18:09 +0100361 */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200362 if (likely(HTTP_IS_LWS(*p))) /* eol, uncertain uri len */
363 break;
364 return NULL; /* oh, no; this is not uri-encoded.
365 * This body does not contain parameters.
366 */
367 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200368 len--;
Bhaskar98634f02013-10-29 23:30:51 -0400369 end++;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200370 /* should we break if vlen exceeds limit? */
371 }
Bhaskar98634f02013-10-29 23:30:51 -0400372 hash = gen_hash(px, start, (end - start));
373
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500374 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100375 hash = full_hash(hash);
Bhaskar98634f02013-10-29 23:30:51 -0400376
Willy Tarreau6c30be52019-01-14 17:07:39 +0100377 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100378 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200379 else
380 return map_get_server_hash(px, hash);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200381 }
382 }
Willy Tarreau01732802007-11-01 22:48:15 +0100383 /* skip to next parameter */
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200384 p = memchr(params, '&', len);
Willy Tarreau01732802007-11-01 22:48:15 +0100385 if (!p)
386 return NULL;
387 p++;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200388 len -= (p - params);
389 params = p;
Willy Tarreau01732802007-11-01 22:48:15 +0100390 }
391 return NULL;
392}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200393
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200394
Willy Tarreaubaaee002006-06-26 02:48:02 +0200395/*
Benoitaffb4812009-03-25 13:02:10 +0100396 * This function tries to find a running server for the proxy <px> following
397 * the Header parameter hash method. It looks for a specific parameter in the
398 * URL and hashes it to compute the server ID. This is useful to optimize
399 * performance by avoiding bounces between servers in contexts where sessions
400 * are shared but cookies are not usable. If the parameter is not found, NULL
401 * is returned. If any server is found, it will be returned. If no valid server
Willy Tarreau9fed8582019-01-14 16:04:54 +0100402 * is found, NULL is returned. When lbprm.arg_opt1 is set, the hash will only
403 * apply to the middle part of a domain name ("use_domain_only" option).
Benoitaffb4812009-03-25 13:02:10 +0100404 */
Willy Tarreau59884a62019-01-02 14:48:31 +0100405static struct server *get_server_hh(struct stream *s, const struct server *avoid)
Benoitaffb4812009-03-25 13:02:10 +0100406{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700407 unsigned int hash = 0;
Benoitaffb4812009-03-25 13:02:10 +0100408 struct proxy *px = s->be;
Willy Tarreau484ff072019-01-14 15:28:53 +0100409 unsigned int plen = px->lbprm.arg_len;
Benoitaffb4812009-03-25 13:02:10 +0100410 unsigned long len;
Benoitaffb4812009-03-25 13:02:10 +0100411 const char *p;
Bhaskar98634f02013-10-29 23:30:51 -0400412 const char *start, *end;
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200413 struct htx *htx = htxbuf(&s->req.buf);
414 struct http_hdr_ctx ctx = { .blk = NULL };
Benoitaffb4812009-03-25 13:02:10 +0100415
416 /* tot_weight appears to mean srv_count */
417 if (px->lbprm.tot_weight == 0)
418 return NULL;
419
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200420 /* note: we won't hash if there's only one server left */
421 if (px->lbprm.tot_used == 1)
422 goto hash_done;
423
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200424 http_find_header(htx, ist2(px->lbprm.arg_str, plen), &ctx, 0);
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100425
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200426 /* if the header is not found or empty, let's fallback to round robin */
427 if (!ctx.blk || !ctx.value.len)
428 return NULL;
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100429
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200430 /* Found a the param_name in the headers.
431 * we will compute the hash based on this value ctx.val.
432 */
433 len = ctx.value.len;
434 p = ctx.value.ptr;
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100435
Willy Tarreau9fed8582019-01-14 16:04:54 +0100436 if (!px->lbprm.arg_opt1) {
Bhaskar98634f02013-10-29 23:30:51 -0400437 hash = gen_hash(px, p, len);
Benoitaffb4812009-03-25 13:02:10 +0100438 } else {
439 int dohash = 0;
Cyril Bontéf607d812015-01-04 15:17:36 +0100440 p += len;
Benoitaffb4812009-03-25 13:02:10 +0100441 /* special computation, use only main domain name, not tld/host
442 * going back from the end of string, start hashing at first
443 * dot stop at next.
444 * This is designed to work with the 'Host' header, and requires
445 * a special option to activate this.
446 */
Cyril Bontéf607d812015-01-04 15:17:36 +0100447 end = p;
Benoitaffb4812009-03-25 13:02:10 +0100448 while (len) {
Cyril Bontéf607d812015-01-04 15:17:36 +0100449 if (dohash) {
450 /* Rewind the pointer until the previous char
451 * is a dot, this will allow to set the start
452 * position of the domain. */
453 if (*(p - 1) == '.')
Benoitaffb4812009-03-25 13:02:10 +0100454 break;
Benoitaffb4812009-03-25 13:02:10 +0100455 }
Cyril Bontéf607d812015-01-04 15:17:36 +0100456 else if (*p == '.') {
457 /* The pointer is rewinded to the dot before the
458 * tld, we memorize the end of the domain and
459 * can enter the domain processing. */
460 end = p;
461 dohash = 1;
462 }
Benoitaffb4812009-03-25 13:02:10 +0100463 p--;
Cyril Bontéf607d812015-01-04 15:17:36 +0100464 len--;
Benoitaffb4812009-03-25 13:02:10 +0100465 }
Cyril Bontéf607d812015-01-04 15:17:36 +0100466 start = p;
Bhaskar98634f02013-10-29 23:30:51 -0400467 hash = gen_hash(px, start, (end - start));
Benoitaffb4812009-03-25 13:02:10 +0100468 }
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500469 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100470 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200471 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100472 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100473 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200474 else
475 return map_get_server_hash(px, hash);
Benoitaffb4812009-03-25 13:02:10 +0100476}
477
Willy Tarreau34db1082012-04-19 17:16:54 +0200478/* RDP Cookie HASH. */
Willy Tarreau59884a62019-01-02 14:48:31 +0100479static struct server *get_server_rch(struct stream *s, const struct server *avoid)
Emeric Brun736aa232009-06-30 17:56:00 +0200480{
Dan Dubovikbd57a9f2014-07-08 08:51:03 -0700481 unsigned int hash = 0;
Emeric Brun736aa232009-06-30 17:56:00 +0200482 struct proxy *px = s->be;
483 unsigned long len;
Emeric Brun736aa232009-06-30 17:56:00 +0200484 int ret;
Willy Tarreau37406352012-04-23 16:16:37 +0200485 struct sample smp;
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200486 int rewind;
Emeric Brun736aa232009-06-30 17:56:00 +0200487
488 /* tot_weight appears to mean srv_count */
489 if (px->lbprm.tot_weight == 0)
490 return NULL;
491
Willy Tarreau37406352012-04-23 16:16:37 +0200492 memset(&smp, 0, sizeof(smp));
Emeric Brun736aa232009-06-30 17:56:00 +0200493
Willy Tarreau6a445eb2018-06-19 07:04:45 +0200494 rewind = co_data(&s->req);
495 c_rew(&s->req, rewind);
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200496
Willy Tarreau484ff072019-01-14 15:28:53 +0100497 ret = fetch_rdp_cookie_name(s, &smp, px->lbprm.arg_str, px->lbprm.arg_len);
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200498 len = smp.data.u.str.data;
Willy Tarreau664092c2011-12-16 19:11:42 +0100499
Willy Tarreaubcbd3932018-06-06 07:13:22 +0200500 c_adv(&s->req, rewind);
Willy Tarreaud1de8af2012-05-18 22:12:14 +0200501
Willy Tarreau37406352012-04-23 16:16:37 +0200502 if (ret == 0 || (smp.flags & SMP_F_MAY_CHANGE) || len == 0)
Emeric Brun736aa232009-06-30 17:56:00 +0200503 return NULL;
504
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200505 /* note: we won't hash if there's only one server left */
506 if (px->lbprm.tot_used == 1)
507 goto hash_done;
508
Willy Tarreau484ff072019-01-14 15:28:53 +0100509 /* Found the param_name in the headers.
Emeric Brun736aa232009-06-30 17:56:00 +0200510 * we will compute the hash based on this value ctx.val.
511 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200512 hash = gen_hash(px, smp.data.u.str.area, len);
Bhaskar98634f02013-10-29 23:30:51 -0400513
Bhaskar Maddalab6c0ac92013-11-05 11:54:02 -0500514 if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL)
Willy Tarreau798a39c2010-11-24 15:04:29 +0100515 hash = full_hash(hash);
Willy Tarreau39c9ba72009-10-01 21:11:15 +0200516 hash_done:
Willy Tarreau6c30be52019-01-14 17:07:39 +0100517 if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau59884a62019-01-02 14:48:31 +0100518 return chash_get_server_hash(px, hash, avoid);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200519 else
520 return map_get_server_hash(px, hash);
Emeric Brun736aa232009-06-30 17:56:00 +0200521}
Christopher Faulet5b517552017-06-09 14:17:53 +0200522
Willy Tarreau760e81d2018-05-03 07:20:40 +0200523/* random value */
Willy Tarreau59884a62019-01-02 14:48:31 +0100524static struct server *get_server_rnd(struct stream *s, const struct server *avoid)
Willy Tarreau760e81d2018-05-03 07:20:40 +0200525{
526 unsigned int hash = 0;
527 struct proxy *px = s->be;
Willy Tarreau21c741a2019-01-14 18:14:27 +0100528 struct server *prev, *curr;
529 int draws = px->lbprm.arg_opt1; // number of draws
Willy Tarreau760e81d2018-05-03 07:20:40 +0200530
531 /* tot_weight appears to mean srv_count */
532 if (px->lbprm.tot_weight == 0)
533 return NULL;
534
Willy Tarreau21c741a2019-01-14 18:14:27 +0100535 curr = NULL;
536 do {
537 prev = curr;
Willy Tarreaub9f54c52020-03-08 17:31:39 +0100538 hash = ha_random32();
Willy Tarreau21c741a2019-01-14 18:14:27 +0100539 curr = chash_get_server_hash(px, hash, avoid);
540 if (!curr)
541 break;
542
543 /* compare the new server to the previous best choice and pick
544 * the one with the least currently served requests.
545 */
546 if (prev && prev != curr &&
547 curr->served * prev->cur_eweight > prev->served * curr->cur_eweight)
548 curr = prev;
549 } while (--draws > 0);
550
551 return curr;
Willy Tarreau760e81d2018-05-03 07:20:40 +0200552}
553
Benoitaffb4812009-03-25 13:02:10 +0100554/*
Willy Tarreau87b09662015-04-03 00:22:06 +0200555 * This function applies the load-balancing algorithm to the stream, as
556 * defined by the backend it is assigned to. The stream is then marked as
Willy Tarreau7c669d72008-06-20 15:04:11 +0200557 * 'assigned'.
558 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200559 * This function MAY NOT be called with SF_ASSIGNED already set. If the stream
Willy Tarreau7c669d72008-06-20 15:04:11 +0200560 * had a server previously assigned, it is rebalanced, trying to avoid the same
Willy Tarreau827aee92011-03-10 16:55:02 +0100561 * server, which should still be present in target_srv(&s->target) before the call.
Willy Tarreau7c669d72008-06-20 15:04:11 +0200562 * The function tries to keep the original connection slot if it reconnects to
563 * the same server, otherwise it releases it and tries to offer it.
564 *
Willy Tarreau87b09662015-04-03 00:22:06 +0200565 * It is illegal to call this function with a stream in a queue.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200566 *
567 * It may return :
Willy Tarreau664beb82011-03-10 11:38:29 +0100568 * SRV_STATUS_OK if everything is OK. ->srv and ->target are assigned.
Willy Tarreau87b09662015-04-03 00:22:06 +0200569 * SRV_STATUS_NOSRV if no server is available. Stream is not ASSIGNED
570 * SRV_STATUS_FULL if all servers are saturated. Stream is not ASSIGNED
Willy Tarreaubaaee002006-06-26 02:48:02 +0200571 * SRV_STATUS_INTERNAL for other unrecoverable errors.
572 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200573 * Upon successful return, the stream flag SF_ASSIGNED is set to indicate that
Willy Tarreau827aee92011-03-10 16:55:02 +0100574 * it does not need to be called anymore. This means that target_srv(&s->target)
575 * can be trusted in balance and direct modes.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200576 *
577 */
578
Willy Tarreau87b09662015-04-03 00:22:06 +0200579int assign_server(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200580{
Olivier Houchardba4fff52018-12-01 14:40:40 +0100581 struct connection *conn = NULL;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200582 struct server *conn_slot;
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100583 struct server *srv = NULL, *prev_srv;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200584 int err;
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100585
Simon Horman8effd3d2011-08-13 08:03:52 +0900586 DPRINTF(stderr,"assign_server : s=%p\n",s);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200587
Willy Tarreau7c669d72008-06-20 15:04:11 +0200588 err = SRV_STATUS_INTERNAL;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200589 if (unlikely(s->pend_pos || s->flags & SF_ASSIGNED))
Willy Tarreau7c669d72008-06-20 15:04:11 +0200590 goto out_err;
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100591
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100592 prev_srv = objt_server(s->target);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200593 conn_slot = s->srv_conn;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200594
Willy Tarreau7c669d72008-06-20 15:04:11 +0200595 /* We have to release any connection slot before applying any LB algo,
596 * otherwise we may erroneously end up with no available slot.
597 */
598 if (conn_slot)
599 sess_change_server(s, NULL);
600
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100601 /* We will now try to find the good server and store it into <objt_server(s->target)>.
602 * Note that <objt_server(s->target)> may be NULL in case of dispatch or proxy mode,
Willy Tarreau7c669d72008-06-20 15:04:11 +0200603 * as well as if no server is available (check error code).
604 */
Willy Tarreau1a20a5d2007-11-01 21:08:19 +0100605
Willy Tarreau827aee92011-03-10 16:55:02 +0100606 srv = NULL;
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100607 s->target = NULL;
Willy Tarreau664beb82011-03-10 11:38:29 +0100608
Olivier Houchardba4fff52018-12-01 14:40:40 +0100609 if ((s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_HI &&
Olivier Houchard250031e2019-05-29 15:01:50 +0200610 ((s->sess->flags & SESS_FL_PREFER_LAST) ||
Olivier Houchardba4fff52018-12-01 14:40:40 +0100611 (s->be->options & PR_O_PREF_LAST))) {
Olivier Houchard351411f2018-12-27 17:20:54 +0100612 struct sess_srv_list *srv_list;
613 list_for_each_entry(srv_list, &s->sess->srv_list, srv_list) {
614 struct server *tmpsrv = objt_server(srv_list->target);
Olivier Houchardba4fff52018-12-01 14:40:40 +0100615
616 if (tmpsrv && tmpsrv->proxy == s->be &&
Olivier Houchard250031e2019-05-29 15:01:50 +0200617 ((s->sess->flags & SESS_FL_PREFER_LAST) ||
Olivier Houchardba4fff52018-12-01 14:40:40 +0100618 (!s->be->max_ka_queue ||
619 server_has_room(tmpsrv) || (
620 tmpsrv->nbpend + 1 < s->be->max_ka_queue))) &&
621 srv_currently_usable(tmpsrv)) {
Olivier Houchard351411f2018-12-27 17:20:54 +0100622 list_for_each_entry(conn, &srv_list->conn_list, session_list) {
Willy Tarreau911db9b2020-01-23 16:27:54 +0100623 if (!(conn->flags & CO_FL_WAIT_XPRT)) {
Olivier Houchardba4fff52018-12-01 14:40:40 +0100624 srv = tmpsrv;
625 s->target = &srv->obj_type;
Christopher Faulete91a5262020-07-01 18:56:30 +0200626 if (conn->flags & CO_FL_SESS_IDLE) {
627 conn->flags &= ~CO_FL_SESS_IDLE;
628 s->sess->idle_conns--;
629 }
Olivier Houchardba4fff52018-12-01 14:40:40 +0100630 goto out_ok;
631 }
632 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100633 }
634 }
Willy Tarreau9420b122013-12-15 18:58:25 +0100635 }
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100636 if (s->be->lbprm.algo & BE_LB_KIND) {
Christopher Faulet5b517552017-06-09 14:17:53 +0200637
Willy Tarreau7c669d72008-06-20 15:04:11 +0200638 /* we must check if we have at least one server available */
639 if (!s->be->lbprm.tot_weight) {
640 err = SRV_STATUS_NOSRV;
641 goto out;
642 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200643
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200644 /* First check whether we need to fetch some data or simply call
645 * the LB lookup function. Only the hashing functions will need
646 * some input data in fact, and will support multiple algorithms.
647 */
648 switch (s->be->lbprm.algo & BE_LB_LKUP) {
649 case BE_LB_LKUP_RRTREE:
Willy Tarreau827aee92011-03-10 16:55:02 +0100650 srv = fwrr_get_next_server(s->be, prev_srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200651 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200652
Willy Tarreauf09c6602012-02-13 17:12:08 +0100653 case BE_LB_LKUP_FSTREE:
654 srv = fas_get_next_server(s->be, prev_srv);
655 break;
656
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200657 case BE_LB_LKUP_LCTREE:
Willy Tarreau827aee92011-03-10 16:55:02 +0100658 srv = fwlc_get_next_server(s->be, prev_srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200659 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200660
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200661 case BE_LB_LKUP_CHTREE:
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200662 case BE_LB_LKUP_MAP:
Willy Tarreau9757a382009-10-03 12:56:50 +0200663 if ((s->be->lbprm.algo & BE_LB_KIND) == BE_LB_KIND_RR) {
Willy Tarreau760e81d2018-05-03 07:20:40 +0200664 if ((s->be->lbprm.algo & BE_LB_PARM) == BE_LB_RR_RANDOM)
Willy Tarreau59884a62019-01-02 14:48:31 +0100665 srv = get_server_rnd(s, prev_srv);
Willy Tarreau6c30be52019-01-14 17:07:39 +0100666 else if ((s->be->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau827aee92011-03-10 16:55:02 +0100667 srv = chash_get_next_server(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200668 else
Willy Tarreau827aee92011-03-10 16:55:02 +0100669 srv = map_get_server_rr(s->be, prev_srv);
Willy Tarreau9757a382009-10-03 12:56:50 +0200670 break;
671 }
672 else if ((s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_HI) {
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200673 /* unknown balancing algorithm */
Willy Tarreau7c669d72008-06-20 15:04:11 +0200674 err = SRV_STATUS_INTERNAL;
675 goto out;
676 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200677
678 switch (s->be->lbprm.algo & BE_LB_PARM) {
679 case BE_LB_HASH_SRC:
Willy Tarreaud0d8da92015-04-04 02:10:38 +0200680 conn = objt_conn(strm_orig(s));
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200681 if (conn && conn_get_src(conn) && conn->src->ss_family == AF_INET) {
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200682 srv = get_server_sh(s->be,
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200683 (void *)&((struct sockaddr_in *)conn->src)->sin_addr,
Willy Tarreau59884a62019-01-02 14:48:31 +0100684 4, prev_srv);
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200685 }
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200686 else if (conn && conn_get_src(conn) && conn->src->ss_family == AF_INET6) {
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200687 srv = get_server_sh(s->be,
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200688 (void *)&((struct sockaddr_in6 *)conn->src)->sin6_addr,
Willy Tarreau59884a62019-01-02 14:48:31 +0100689 16, prev_srv);
Willy Tarreau5dd7fa12012-03-31 19:53:37 +0200690 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200691 else {
692 /* unknown IP family */
693 err = SRV_STATUS_INTERNAL;
694 goto out;
695 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200696 break;
697
698 case BE_LB_HASH_URI:
699 /* URI hashing */
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200700 if (IS_HTX_STRM(s) && s->txn->req.msg_state >= HTTP_MSG_BODY) {
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100701 struct ist uri;
702
Christopher Faulet297fbb42019-05-13 14:41:27 +0200703 uri = htx_sl_req_uri(http_get_stline(htxbuf(&s->req.buf)));
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100704 srv = get_server_uh(s->be, uri.ptr, uri.len, prev_srv);
705 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200706 break;
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +0200707
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200708 case BE_LB_HASH_PRM:
709 /* URL Parameter hashing */
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200710 if (IS_HTX_STRM(s) && s->txn->req.msg_state >= HTTP_MSG_BODY) {
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100711 struct ist uri;
712
Christopher Faulet297fbb42019-05-13 14:41:27 +0200713 uri = htx_sl_req_uri(http_get_stline(htxbuf(&s->req.buf)));
Christopher Fauletf7679ad2019-02-04 12:02:18 +0100714 srv = get_server_ph(s->be, uri.ptr, uri.len, prev_srv);
Willy Tarreau61a21a32011-03-01 20:35:49 +0100715
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200716 if (!srv && s->txn->meth == HTTP_METH_POST)
717 srv = get_server_ph_post(s, prev_srv);
718 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200719 break;
Benoitaffb4812009-03-25 13:02:10 +0100720
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200721 case BE_LB_HASH_HDR:
722 /* Header Parameter hashing */
Christopher Faulet7d37fbb2019-07-15 15:37:57 +0200723 if (IS_HTX_STRM(s) && s->txn->req.msg_state >= HTTP_MSG_BODY)
724 srv = get_server_hh(s, prev_srv);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200725 break;
726
727 case BE_LB_HASH_RDP:
728 /* RDP Cookie hashing */
Willy Tarreau59884a62019-01-02 14:48:31 +0100729 srv = get_server_rch(s, prev_srv);
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200730 break;
731
732 default:
733 /* unknown balancing algorithm */
734 err = SRV_STATUS_INTERNAL;
735 goto out;
Benoitaffb4812009-03-25 13:02:10 +0100736 }
Emeric Brun736aa232009-06-30 17:56:00 +0200737
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200738 /* If the hashing parameter was not found, let's fall
739 * back to round robin on the map.
740 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100741 if (!srv) {
Willy Tarreau6c30be52019-01-14 17:07:39 +0100742 if ((s->be->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE)
Willy Tarreau827aee92011-03-10 16:55:02 +0100743 srv = chash_get_next_server(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200744 else
Willy Tarreau827aee92011-03-10 16:55:02 +0100745 srv = map_get_server_rr(s->be, prev_srv);
Willy Tarreau6b2e11b2009-10-01 07:52:15 +0200746 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200747
748 /* end of map-based LB */
Emeric Brun736aa232009-06-30 17:56:00 +0200749 break;
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200750
Willy Tarreau7c669d72008-06-20 15:04:11 +0200751 default:
752 /* unknown balancing algorithm */
753 err = SRV_STATUS_INTERNAL;
754 goto out;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200755 }
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200756
Willy Tarreau827aee92011-03-10 16:55:02 +0100757 if (!srv) {
Willy Tarreauda76f4f2009-10-03 12:36:05 +0200758 err = SRV_STATUS_FULL;
759 goto out;
760 }
Willy Tarreau827aee92011-03-10 16:55:02 +0100761 else if (srv != prev_srv) {
Olivier Houchard237f7812019-03-08 18:49:07 +0100762 _HA_ATOMIC_ADD(&s->be->be_counters.cum_lbconn, 1);
763 _HA_ATOMIC_ADD(&srv->counters.cum_lbconn, 1);
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100764 }
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100765 s->target = &srv->obj_type;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200766 }
Willy Tarreau1620ec32011-08-06 17:05:02 +0200767 else if (s->be->options & (PR_O_DISPATCH | PR_O_TRANSP)) {
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100768 s->target = &s->be->obj_type;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200769 }
Olivier Houchard2442f682018-12-01 17:03:38 +0100770 else if ((s->be->options & PR_O_HTTP_PROXY)) {
771 conn = cs_conn(objt_cs(s->si[1].end));
772
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200773 if (conn && conn->dst && is_addr(conn->dst)) {
Olivier Houchard2442f682018-12-01 17:03:38 +0100774 /* in proxy mode, we need a valid destination address */
775 s->target = &s->be->obj_type;
776 } else {
777 err = SRV_STATUS_NOSRV;
778 goto out;
779 }
Willy Tarreau664beb82011-03-10 11:38:29 +0100780 }
781 else {
Willy Tarreau7c669d72008-06-20 15:04:11 +0200782 err = SRV_STATUS_NOSRV;
783 goto out;
784 }
785
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100786out_ok:
Willy Tarreaue7dff022015-04-03 01:14:29 +0200787 s->flags |= SF_ASSIGNED;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200788 err = SRV_STATUS_OK;
789 out:
790
791 /* Either we take back our connection slot, or we offer it to someone
792 * else if we don't need it anymore.
793 */
794 if (conn_slot) {
Willy Tarreau827aee92011-03-10 16:55:02 +0100795 if (conn_slot == srv) {
796 sess_change_server(s, srv);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200797 } else {
798 if (may_dequeue_tasks(conn_slot, s->be))
799 process_srv_queue(conn_slot);
800 }
801 }
802
803 out_err:
804 return err;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200805}
806
Willy Tarreaubaaee002006-06-26 02:48:02 +0200807/*
Willy Tarreaue7dff022015-04-03 01:14:29 +0200808 * This function assigns a server address to a stream, and sets SF_ADDR_SET.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200809 * The address is taken from the currently assigned server, or from the
810 * dispatch or transparent address.
811 *
812 * It may return :
813 * SRV_STATUS_OK if everything is OK.
814 * SRV_STATUS_INTERNAL for other unrecoverable errors.
815 *
Willy Tarreaue7dff022015-04-03 01:14:29 +0200816 * Upon successful return, the stream flag SF_ADDR_SET is set. This flag is
Willy Tarreaubaaee002006-06-26 02:48:02 +0200817 * not cleared, so it's to the caller to clear it if required.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200818 */
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200819int assign_server_address(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200820{
Willy Tarreaud0d8da92015-04-04 02:10:38 +0200821 struct connection *cli_conn = objt_conn(strm_orig(s));
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200822
Christopher Faulet56803b12017-11-24 16:06:18 +0100823 DPRINTF(stderr,"assign_server_address : s=%p\n",s);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200824
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200825 if (!sockaddr_alloc(&s->target_addr))
Willy Tarreauca79f592019-07-17 19:04:47 +0200826 return SRV_STATUS_INTERNAL;
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200827
Willy Tarreaue7dff022015-04-03 01:14:29 +0200828 if ((s->flags & SF_DIRECT) || (s->be->lbprm.algo & BE_LB_KIND)) {
Willy Tarreau87b09662015-04-03 00:22:06 +0200829 /* A server is necessarily known for this stream */
Willy Tarreaue7dff022015-04-03 01:14:29 +0200830 if (!(s->flags & SF_ASSIGNED))
Willy Tarreaubaaee002006-06-26 02:48:02 +0200831 return SRV_STATUS_INTERNAL;
832
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200833 *s->target_addr = __objt_server(s->target)->addr;
834 set_host_port(s->target_addr, __objt_server(s->target)->svc_port);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200835
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200836 if (!is_addr(s->target_addr) && cli_conn) {
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200837 /* if the server has no address, we use the same address
838 * the client asked, which is handy for remapping ports
Willy Tarreau9cf8d3f2014-05-09 22:56:10 +0200839 * locally on multiple addresses at once. Nothing is done
840 * for AF_UNIX addresses.
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200841 */
Willy Tarreau3cc01d82019-07-17 11:27:38 +0200842 if (!conn_get_dst(cli_conn)) {
843 /* do nothing if we can't retrieve the address */
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200844 } else if (cli_conn->dst->ss_family == AF_INET) {
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200845 ((struct sockaddr_in *)s->target_addr)->sin_addr = ((struct sockaddr_in *)cli_conn->dst)->sin_addr;
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200846 } else if (cli_conn->dst->ss_family == AF_INET6) {
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200847 ((struct sockaddr_in6 *)s->target_addr)->sin6_addr = ((struct sockaddr_in6 *)cli_conn->dst)->sin6_addr;
Emeric Brunec810d12010-10-22 16:36:33 +0200848 }
Willy Tarreaud669a4f2010-07-13 14:49:50 +0200849 }
850
Willy Tarreaubaaee002006-06-26 02:48:02 +0200851 /* if this server remaps proxied ports, we'll use
852 * the port the client connected to with an offset. */
Willy Tarreau1e582e52018-09-20 11:29:28 +0200853 if ((__objt_server(s->target)->flags & SRV_F_MAPPORTS) && cli_conn) {
David du Colombier6f5ccb12011-03-10 22:26:24 +0100854 int base_port;
855
Willy Tarreau3cc01d82019-07-17 11:27:38 +0200856 if (conn_get_dst(cli_conn)) {
857 /* First, retrieve the port from the incoming connection */
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200858 base_port = get_host_port(cli_conn->dst);
David du Colombier6f5ccb12011-03-10 22:26:24 +0100859
Willy Tarreau3cc01d82019-07-17 11:27:38 +0200860 /* Second, assign the outgoing connection's port */
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200861 base_port += get_host_port(s->target_addr);
862 set_host_port(s->target_addr, base_port);
Willy Tarreau3cc01d82019-07-17 11:27:38 +0200863 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200864 }
865 }
Willy Tarreau1620ec32011-08-06 17:05:02 +0200866 else if (s->be->options & PR_O_DISPATCH) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200867 /* connect to the defined dispatch addr */
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200868 *s->target_addr = s->be->dispatch_addr;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200869 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200870 else if ((s->be->options & PR_O_TRANSP) && cli_conn) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200871 /* in transparent mode, use the original dest addr if no dispatch specified */
Willy Tarreau3cc01d82019-07-17 11:27:38 +0200872 if (conn_get_dst(cli_conn) &&
Willy Tarreauc0e16f22019-07-17 18:16:30 +0200873 (cli_conn->dst->ss_family == AF_INET || cli_conn->dst->ss_family == AF_INET6))
Willy Tarreau1c8d32b2019-07-18 15:47:45 +0200874 *s->target_addr = *cli_conn->dst;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200875 }
Alexandre Cassen5eb1a902007-11-29 15:43:32 +0100876 else if (s->be->options & PR_O_HTTP_PROXY) {
877 /* If HTTP PROXY option is set, then server is already assigned
878 * during incoming client request parsing. */
879 }
Willy Tarreau1a1158b2007-01-20 11:07:46 +0100880 else {
881 /* no server and no LB algorithm ! */
882 return SRV_STATUS_INTERNAL;
883 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200884
Willy Tarreaue7dff022015-04-03 01:14:29 +0200885 s->flags |= SF_ADDR_SET;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200886 return SRV_STATUS_OK;
887}
888
Willy Tarreau87b09662015-04-03 00:22:06 +0200889/* This function assigns a server to stream <s> if required, and can add the
Willy Tarreaubaaee002006-06-26 02:48:02 +0200890 * connection to either the assigned server's queue or to the proxy's queue.
Willy Tarreau87b09662015-04-03 00:22:06 +0200891 * If ->srv_conn is set, the stream is first released from the server.
Willy Tarreaue7dff022015-04-03 01:14:29 +0200892 * It may also be called with SF_DIRECT and/or SF_ASSIGNED though. It will
Willy Tarreau7c669d72008-06-20 15:04:11 +0200893 * be called before any connection and after any retry or redispatch occurs.
894 *
Willy Tarreau87b09662015-04-03 00:22:06 +0200895 * It is not allowed to call this function with a stream in a queue.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200896 *
897 * Returns :
898 *
899 * SRV_STATUS_OK if everything is OK.
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100900 * SRV_STATUS_NOSRV if no server is available. objt_server(s->target) = NULL.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200901 * SRV_STATUS_QUEUED if the connection has been queued.
902 * SRV_STATUS_FULL if the server(s) is/are saturated and the
Willy Tarreau827aee92011-03-10 16:55:02 +0100903 * connection could not be queued at the server's,
Willy Tarreau7c669d72008-06-20 15:04:11 +0200904 * which may be NULL if we queue on the backend.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200905 * SRV_STATUS_INTERNAL for other unrecoverable errors.
906 *
907 */
Willy Tarreau87b09662015-04-03 00:22:06 +0200908int assign_server_and_queue(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200909{
910 struct pendconn *p;
Willy Tarreau827aee92011-03-10 16:55:02 +0100911 struct server *srv;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200912 int err;
913
914 if (s->pend_pos)
915 return SRV_STATUS_INTERNAL;
916
Willy Tarreau7c669d72008-06-20 15:04:11 +0200917 err = SRV_STATUS_OK;
Willy Tarreaue7dff022015-04-03 01:14:29 +0200918 if (!(s->flags & SF_ASSIGNED)) {
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100919 struct server *prev_srv = objt_server(s->target);
Willy Tarreau3d80d912011-03-10 11:42:13 +0100920
Willy Tarreau7c669d72008-06-20 15:04:11 +0200921 err = assign_server(s);
Willy Tarreau3d80d912011-03-10 11:42:13 +0100922 if (prev_srv) {
Willy Tarreau87b09662015-04-03 00:22:06 +0200923 /* This stream was previously assigned to a server. We have to
924 * update the stream's and the server's stats :
Willy Tarreau7c669d72008-06-20 15:04:11 +0200925 * - if the server changed :
926 * - set TX_CK_DOWN if txn.flags was TX_CK_VALID
Willy Tarreaue7dff022015-04-03 01:14:29 +0200927 * - set SF_REDISP if it was successfully redispatched
Willy Tarreau7c669d72008-06-20 15:04:11 +0200928 * - increment srv->redispatches and be->redispatches
929 * - if the server remained the same : update retries.
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100930 */
931
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100932 if (prev_srv != objt_server(s->target)) {
Willy Tarreaueee5b512015-04-03 23:46:31 +0200933 if (s->txn && (s->txn->flags & TX_CK_MASK) == TX_CK_VALID) {
934 s->txn->flags &= ~TX_CK_MASK;
935 s->txn->flags |= TX_CK_DOWN;
Willy Tarreau7c669d72008-06-20 15:04:11 +0200936 }
Willy Tarreaue7dff022015-04-03 01:14:29 +0200937 s->flags |= SF_REDISP;
Olivier Houchard237f7812019-03-08 18:49:07 +0100938 _HA_ATOMIC_ADD(&prev_srv->counters.redispatches, 1);
939 _HA_ATOMIC_ADD(&s->be->be_counters.redispatches, 1);
Willy Tarreau7c669d72008-06-20 15:04:11 +0200940 } else {
Olivier Houchard237f7812019-03-08 18:49:07 +0100941 _HA_ATOMIC_ADD(&prev_srv->counters.retries, 1);
942 _HA_ATOMIC_ADD(&s->be->be_counters.retries, 1);
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100943 }
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +0100944 }
945 }
946
Willy Tarreaubaaee002006-06-26 02:48:02 +0200947 switch (err) {
948 case SRV_STATUS_OK:
Willy Tarreaue7dff022015-04-03 01:14:29 +0200949 /* we have SF_ASSIGNED set */
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100950 srv = objt_server(s->target);
Willy Tarreau827aee92011-03-10 16:55:02 +0100951 if (!srv)
Willy Tarreau7c669d72008-06-20 15:04:11 +0200952 return SRV_STATUS_OK; /* dispatch or proxy mode */
953
954 /* If we already have a connection slot, no need to check any queue */
Willy Tarreau827aee92011-03-10 16:55:02 +0100955 if (s->srv_conn == srv)
Willy Tarreau7c669d72008-06-20 15:04:11 +0200956 return SRV_STATUS_OK;
957
Willy Tarreau87b09662015-04-03 00:22:06 +0200958 /* OK, this stream already has an assigned server, but no
Willy Tarreau7c669d72008-06-20 15:04:11 +0200959 * connection slot yet. Either it is a redispatch, or it was
960 * assigned from persistence information (direct mode).
961 */
Willy Tarreaue7dff022015-04-03 01:14:29 +0200962 if ((s->flags & SF_REDIRECTABLE) && srv->rdr_len) {
Willy Tarreau7c669d72008-06-20 15:04:11 +0200963 /* server scheduled for redirection, and already assigned. We
964 * don't want to go further nor check the queue.
Willy Tarreau21d2af32008-02-14 20:25:24 +0100965 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100966 sess_change_server(s, srv); /* not really needed in fact */
Willy Tarreau21d2af32008-02-14 20:25:24 +0100967 return SRV_STATUS_OK;
968 }
969
Willy Tarreau87b09662015-04-03 00:22:06 +0200970 /* We might have to queue this stream if the assigned server is full.
Willy Tarreau7c669d72008-06-20 15:04:11 +0200971 * We know we have to queue it into the server's queue, so if a maxqueue
972 * is set on the server, we must also check that the server's queue is
973 * not full, in which case we have to return FULL.
974 */
Willy Tarreau827aee92011-03-10 16:55:02 +0100975 if (srv->maxconn &&
976 (srv->nbpend || srv->served >= srv_dynamic_maxconn(srv))) {
Willy Tarreau7c669d72008-06-20 15:04:11 +0200977
Willy Tarreau827aee92011-03-10 16:55:02 +0100978 if (srv->maxqueue > 0 && srv->nbpend >= srv->maxqueue)
Willy Tarreau7c669d72008-06-20 15:04:11 +0200979 return SRV_STATUS_FULL;
980
Willy Tarreaubaaee002006-06-26 02:48:02 +0200981 p = pendconn_add(s);
982 if (p)
983 return SRV_STATUS_QUEUED;
984 else
Willy Tarreau7c669d72008-06-20 15:04:11 +0200985 return SRV_STATUS_INTERNAL;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200986 }
Willy Tarreau7c669d72008-06-20 15:04:11 +0200987
988 /* OK, we can use this server. Let's reserve our place */
Willy Tarreau827aee92011-03-10 16:55:02 +0100989 sess_change_server(s, srv);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200990 return SRV_STATUS_OK;
991
992 case SRV_STATUS_FULL:
Willy Tarreau87b09662015-04-03 00:22:06 +0200993 /* queue this stream into the proxy's queue */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200994 p = pendconn_add(s);
995 if (p)
996 return SRV_STATUS_QUEUED;
997 else
Willy Tarreau7c669d72008-06-20 15:04:11 +0200998 return SRV_STATUS_INTERNAL;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200999
1000 case SRV_STATUS_NOSRV:
Willy Tarreau7c669d72008-06-20 15:04:11 +02001001 return err;
1002
Willy Tarreaubaaee002006-06-26 02:48:02 +02001003 case SRV_STATUS_INTERNAL:
1004 return err;
Willy Tarreau7c669d72008-06-20 15:04:11 +02001005
Willy Tarreaubaaee002006-06-26 02:48:02 +02001006 default:
1007 return SRV_STATUS_INTERNAL;
1008 }
Willy Tarreau5b6995c2008-01-13 16:31:17 +01001009}
Willy Tarreaubaaee002006-06-26 02:48:02 +02001010
Willy Tarreaub1d67742010-03-29 19:36:59 +02001011/* If an explicit source binding is specified on the server and/or backend, and
1012 * this source makes use of the transparent proxy, then it is extracted now and
Willy Tarreau87b09662015-04-03 00:22:06 +02001013 * assigned to the stream's pending connection. This function assumes that an
Willy Tarreau350f4872014-11-28 14:42:25 +01001014 * outgoing connection has already been assigned to s->si[1].end.
Willy Tarreaub1d67742010-03-29 19:36:59 +02001015 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001016static void assign_tproxy_address(struct stream *s)
Willy Tarreaub1d67742010-03-29 19:36:59 +02001017{
Willy Tarreau29fbe512015-08-20 19:35:14 +02001018#if defined(CONFIG_HAP_TRANSPARENT)
Willy Tarreau3fdb3662012-11-12 00:42:33 +01001019 struct server *srv = objt_server(s->target);
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001020 struct conn_src *src;
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001021 struct connection *cli_conn;
Olivier Houchard09a0f032019-01-17 15:59:13 +01001022 struct connection *srv_conn;
1023
1024 if (objt_cs(s->si[1].end))
1025 srv_conn = cs_conn(__objt_cs(s->si[1].end));
1026 else
1027 srv_conn = objt_conn(s->si[1].end);
Willy Tarreau827aee92011-03-10 16:55:02 +01001028
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001029 if (srv && srv->conn_src.opts & CO_SRC_BIND)
1030 src = &srv->conn_src;
1031 else if (s->be->conn_src.opts & CO_SRC_BIND)
1032 src = &s->be->conn_src;
1033 else
1034 return;
Willy Tarreau294c4732011-12-16 21:35:50 +01001035
Willy Tarreauca79f592019-07-17 19:04:47 +02001036 if (!sockaddr_alloc(&srv_conn->src))
1037 return;
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001038
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001039 switch (src->opts & CO_SRC_TPROXY_MASK) {
1040 case CO_SRC_TPROXY_ADDR:
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001041 *srv_conn->src = src->tproxy_addr;
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001042 break;
1043 case CO_SRC_TPROXY_CLI:
1044 case CO_SRC_TPROXY_CIP:
1045 /* FIXME: what can we do if the client connects in IPv6 or unix socket ? */
Willy Tarreaud0d8da92015-04-04 02:10:38 +02001046 cli_conn = objt_conn(strm_orig(s));
Willy Tarreau3cc01d82019-07-17 11:27:38 +02001047 if (cli_conn && conn_get_src(cli_conn))
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001048 *srv_conn->src = *cli_conn->src;
1049 else {
Willy Tarreau16aa4af2019-07-18 11:16:41 +02001050 sockaddr_free(&srv_conn->src);
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001051 }
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001052 break;
1053 case CO_SRC_TPROXY_DYN:
Christopher Faulet7d37fbb2019-07-15 15:37:57 +02001054 if (src->bind_hdr_occ && IS_HTX_STRM(s)) {
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001055 char *vptr;
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001056 size_t vlen;
Willy Tarreau294c4732011-12-16 21:35:50 +01001057
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001058 /* bind to the IP in a header */
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001059 ((struct sockaddr_in *)srv_conn->src)->sin_family = AF_INET;
1060 ((struct sockaddr_in *)srv_conn->src)->sin_port = 0;
1061 ((struct sockaddr_in *)srv_conn->src)->sin_addr.s_addr = 0;
Christopher Faulet7d37fbb2019-07-15 15:37:57 +02001062 if (http_get_htx_hdr(htxbuf(&s->req.buf),
1063 ist2(src->bind_hdr_name, src->bind_hdr_len),
1064 src->bind_hdr_occ, NULL, &vptr, &vlen)) {
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001065 ((struct sockaddr_in *)srv_conn->src)->sin_addr.s_addr =
Christopher Faulet7d37fbb2019-07-15 15:37:57 +02001066 htonl(inetaddr_host_lim(vptr, vptr + vlen));
Willy Tarreaubce70882009-09-07 11:51:47 +02001067 }
Willy Tarreaub1d67742010-03-29 19:36:59 +02001068 }
Willy Tarreau9cd7d6c2012-12-08 23:13:33 +01001069 break;
1070 default:
Willy Tarreau16aa4af2019-07-18 11:16:41 +02001071 sockaddr_free(&srv_conn->src);
Willy Tarreaub1d67742010-03-29 19:36:59 +02001072 }
1073#endif
1074}
1075
Olivier Houchard566df302020-03-06 18:18:56 +01001076/* Attempt to get a backend connection from the specified mt_list array
Willy Tarreau0d587112020-07-01 15:04:38 +02001077 * (safe or idle connections). The <is_safe> argument means what type of
1078 * connection the caller wants.
Olivier Houchard566df302020-03-06 18:18:56 +01001079 */
1080static struct connection *conn_backend_get(struct server *srv, int is_safe)
1081{
1082 struct mt_list *mt_list = is_safe ? srv->safe_conns : srv->idle_conns;
1083 struct connection *conn;
Willy Tarreau2f3f4d32020-07-01 07:43:51 +02001084 int i; // thread number
Olivier Houchard566df302020-03-06 18:18:56 +01001085 int found = 0;
Willy Tarreau364f25a2020-07-01 15:55:30 +02001086 int stop;
Olivier Houchard566df302020-03-06 18:18:56 +01001087
1088 /* We need to lock even if this is our own list, because another
1089 * thread may be trying to migrate that connection, and we don't want
1090 * to end up with two threads using the same connection.
1091 */
Willy Tarreau2f3f4d32020-07-01 07:43:51 +02001092 i = tid;
Olivier Houchardf8f4c2e2020-06-29 20:15:59 +02001093 HA_SPIN_LOCK(OTHER_LOCK, &idle_conns[tid].takeover_lock);
Olivier Houchard566df302020-03-06 18:18:56 +01001094 conn = MT_LIST_POP(&mt_list[tid], struct connection *, list);
Willy Tarreau0d587112020-07-01 15:04:38 +02001095
1096 /* If we failed to pick a connection from the idle list, let's try again with
1097 * the safe list.
1098 */
1099 if (!conn && !is_safe && srv->curr_safe_nb > 0) {
1100 conn = MT_LIST_POP(&srv->safe_conns[tid], struct connection *, list);
1101 if (conn) {
1102 is_safe = 1;
1103 mt_list = srv->safe_conns;
1104 }
1105 }
Olivier Houchardf8f4c2e2020-06-29 20:15:59 +02001106 HA_SPIN_UNLOCK(OTHER_LOCK, &idle_conns[tid].takeover_lock);
Olivier Houchard566df302020-03-06 18:18:56 +01001107
1108 /* If we found a connection in our own list, and we don't have to
1109 * steal one from another thread, then we're done.
1110 */
Willy Tarreau2f3f4d32020-07-01 07:43:51 +02001111 if (conn)
1112 goto done;
1113
Willy Tarreau76cc6992020-07-01 18:49:24 +02001114 /* pool sharing globally disabled ? */
1115 if (!(global.tune.options & GTUNE_IDLE_POOL_SHARED))
1116 goto done;
1117
Willy Tarreau2f3f4d32020-07-01 07:43:51 +02001118 /* Are we allowed to pick from another thread ? We'll still try
1119 * it if we're running low on FDs as we don't want to create
1120 * extra conns in this case, otherwise we can give up if we have
1121 * too few idle conns.
1122 */
1123 if (srv->curr_idle_conns < srv->low_idle_conns &&
1124 ha_used_fds < global.tune.pool_low_count)
1125 goto done;
Olivier Houchard566df302020-03-06 18:18:56 +01001126
Willy Tarreau364f25a2020-07-01 15:55:30 +02001127 /* Lookup all other threads for an idle connection, starting from last
1128 * unvisited thread.
1129 */
1130 stop = srv->next_takeover;
1131 if (stop >= global.nbthread)
1132 stop = 0;
1133
1134 for (i = stop; !found && (i = ((i + 1 == global.nbthread) ? 0 : i + 1)) != stop;) {
Olivier Houchard566df302020-03-06 18:18:56 +01001135 struct mt_list *elt1, elt2;
1136
Willy Tarreau364f25a2020-07-01 15:55:30 +02001137 if (!srv->curr_idle_thr[i] || i == tid)
Willy Tarreau151c2532020-07-01 08:24:44 +02001138 continue;
1139
Olivier Houchardf8f4c2e2020-06-29 20:15:59 +02001140 HA_SPIN_LOCK(OTHER_LOCK, &idle_conns[i].takeover_lock);
Olivier Houchard566df302020-03-06 18:18:56 +01001141 mt_list_for_each_entry_safe(conn, &mt_list[i], list, elt1, elt2) {
Olivier Houchard1662cdb2020-07-03 14:04:37 +02001142 if (conn->mux->takeover && conn->mux->takeover(conn, i) == 0) {
Olivier Houchard566df302020-03-06 18:18:56 +01001143 MT_LIST_DEL_SAFE(elt1);
Willy Tarreaub1591322020-06-29 14:17:59 +02001144 _HA_ATOMIC_ADD(&activity[tid].fd_takeover, 1);
Olivier Houchard566df302020-03-06 18:18:56 +01001145 found = 1;
1146 break;
1147 }
1148 }
Willy Tarreau0d587112020-07-01 15:04:38 +02001149
1150 if (!found && !is_safe && srv->curr_safe_nb > 0) {
1151 mt_list_for_each_entry_safe(conn, &srv->safe_conns[i], list, elt1, elt2) {
Olivier Houchard1662cdb2020-07-03 14:04:37 +02001152 if (conn->mux->takeover && conn->mux->takeover(conn, i) == 0) {
Willy Tarreau0d587112020-07-01 15:04:38 +02001153 MT_LIST_DEL_SAFE(elt1);
1154 _HA_ATOMIC_ADD(&activity[tid].fd_takeover, 1);
1155 found = 1;
1156 is_safe = 1;
1157 mt_list = srv->safe_conns;
1158 break;
1159 }
1160 }
1161 }
Olivier Houchardf8f4c2e2020-06-29 20:15:59 +02001162 HA_SPIN_UNLOCK(OTHER_LOCK, &idle_conns[i].takeover_lock);
Olivier Houchard566df302020-03-06 18:18:56 +01001163 }
1164
1165 if (!found)
1166 conn = NULL;
Willy Tarreau2f3f4d32020-07-01 07:43:51 +02001167 done:
1168 if (conn) {
Willy Tarreau364f25a2020-07-01 15:55:30 +02001169 _HA_ATOMIC_STORE(&srv->next_takeover, (i + 1 == global.nbthread) ? 0 : i + 1);
Christopher Faulet3d52f0f2020-07-02 15:45:56 +02001170 srv_use_idle_conn(srv, conn);
Olivier Houchard566df302020-03-06 18:18:56 +01001171 }
1172 return conn;
1173}
1174
Willy Tarreaubaaee002006-06-26 02:48:02 +02001175/*
Willy Tarreau87b09662015-04-03 00:22:06 +02001176 * This function initiates a connection to the server assigned to this stream
Willy Tarreau350f4872014-11-28 14:42:25 +01001177 * (s->target, s->si[1].addr.to). It will assign a server if none
Willy Tarreau664beb82011-03-10 11:38:29 +01001178 * is assigned yet.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001179 * It can return one of :
Willy Tarreaue7dff022015-04-03 01:14:29 +02001180 * - SF_ERR_NONE if everything's OK
1181 * - SF_ERR_SRVTO if there are no more servers
1182 * - SF_ERR_SRVCL if the connection was refused by the server
1183 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
1184 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
1185 * - SF_ERR_INTERNAL for any other purely internal errors
Tim Düsterhus4896c442016-11-29 02:15:19 +01001186 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001187 * The server-facing stream interface is expected to hold a pre-allocated connection
Willy Tarreau350f4872014-11-28 14:42:25 +01001188 * in s->si[1].conn.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001189 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001190int connect_server(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001191{
Willy Tarreau1c8d32b2019-07-18 15:47:45 +02001192 struct connection *cli_conn = objt_conn(strm_orig(s));
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001193 struct connection *srv_conn = NULL;
Olivier Houchard2442f682018-12-01 17:03:38 +01001194 struct conn_stream *srv_cs = NULL;
Willy Tarreau827aee92011-03-10 16:55:02 +01001195 struct server *srv;
Willy Tarreau34601a82013-12-15 16:33:46 +01001196 int reuse = 0;
Olivier Houchard5cd62172019-01-04 15:52:26 +01001197 int init_mux = 0;
Willy Tarreau9650f372009-08-16 14:02:45 +02001198 int err;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001199
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001200
Willy Tarreaua5797aa2019-07-18 18:40:06 +02001201 /* This will catch some corner cases such as lying connections resulting from
1202 * retries or connect timeouts but will rarely trigger.
Olivier Houchard0fa989f2018-12-05 17:08:55 +01001203 */
Willy Tarreaua5797aa2019-07-18 18:40:06 +02001204 si_release_endpoint(&s->si[1]);
1205
Willy Tarreaub0821862019-07-18 19:26:11 +02001206 /* first, search for a matching connection in the session's idle conns */
Christopher Fauletfcc3d8a2020-07-01 16:36:51 +02001207 srv_conn = session_get_conn(s->sess, s->target);
1208 if (srv_conn)
1209 reuse = 1;
Olivier Houchard00cf70f2018-11-30 17:24:55 +01001210
Willy Tarreau7b004922015-08-04 19:34:21 +02001211 srv = objt_server(s->target);
Willy Tarreau34601a82013-12-15 16:33:46 +01001212
Willy Tarreau8dff9982015-08-04 20:45:52 +02001213 if (srv && !reuse) {
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001214 srv_conn = NULL;
Willy Tarreau8dff9982015-08-04 20:45:52 +02001215
Olivier Houcharddc2f2752020-02-13 19:12:07 +01001216 /* Below we pick connections from the safe, idle or
1217 * available (which are safe too) lists based
Willy Tarreau449d74a2015-08-05 17:16:33 +02001218 * on the strategy, the fact that this is a first or second
1219 * (retryable) request, with the indicated priority (1 or 2) :
1220 *
1221 * SAFE AGGR ALWS
1222 *
1223 * +-----+-----+ +-----+-----+ +-----+-----+
1224 * req| 1st | 2nd | req| 1st | 2nd | req| 1st | 2nd |
1225 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1226 * safe| - | 2 | safe| 1 | 2 | safe| 1 | 2 |
1227 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
1228 * idle| - | 1 | idle| - | 1 | idle| 2 | 1 |
1229 * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+
Willy Tarreaub0821862019-07-18 19:26:11 +02001230 *
1231 * Idle conns are necessarily looked up on the same thread so
1232 * that there is no concurrency issues.
Willy Tarreau449d74a2015-08-05 17:16:33 +02001233 */
Olivier Houcharddc2f2752020-02-13 19:12:07 +01001234 if (srv->available_conns && !LIST_ISEMPTY(&srv->available_conns[tid]) &&
Olivier Houchard566df302020-03-06 18:18:56 +01001235 ((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR)) {
Olivier Houcharddc2f2752020-02-13 19:12:07 +01001236 srv_conn = LIST_ELEM(srv->available_conns[tid].n, struct connection *, list);
Olivier Houchard566df302020-03-06 18:18:56 +01001237 reuse = 1;
Willy Tarreau449d74a2015-08-05 17:16:33 +02001238 }
Olivier Houchard566df302020-03-06 18:18:56 +01001239 else if (!srv_conn && srv->curr_idle_conns > 0) {
Willy Tarreau0d587112020-07-01 15:04:38 +02001240 if (srv->idle_conns && srv->safe_conns &&
Olivier Houchard566df302020-03-06 18:18:56 +01001241 ((s->be->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR &&
1242 s->txn && (s->txn->flags & TX_NOT_FIRST)) &&
Willy Tarreau0d587112020-07-01 15:04:38 +02001243 srv->curr_idle_nb + srv->curr_safe_nb > 0) {
1244 /* we're on the second column of the tables above, let's
1245 * try idle then safe.
1246 */
Olivier Houchard566df302020-03-06 18:18:56 +01001247 srv_conn = conn_backend_get(srv, 0);
1248 }
1249 else if (srv->safe_conns &&
1250 ((s->txn && (s->txn->flags & TX_NOT_FIRST)) ||
1251 (s->be->options & PR_O_REUSE_MASK) >= PR_O_REUSE_AGGR) &&
1252 srv->curr_safe_nb > 0) {
1253 srv_conn = conn_backend_get(srv, 1);
1254 }
1255 else if (srv->idle_conns &&
1256 ((s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) &&
1257 srv->curr_idle_nb > 0) {
1258 srv_conn = conn_backend_get(srv, 0);
1259 }
1260 /* If we've picked a connection from the pool, we now have to
1261 * detach it. We may have to get rid of the previous idle
1262 * connection we had, so for this we try to swap it with the
1263 * other owner's. That way it may remain alive for others to
1264 * pick.
1265 */
Christopher Faulet3d52f0f2020-07-02 15:45:56 +02001266 if (srv_conn)
Olivier Houchard566df302020-03-06 18:18:56 +01001267 reuse = 1;
Olivier Houcharddc2f2752020-02-13 19:12:07 +01001268 }
Willy Tarreau8dff9982015-08-04 20:45:52 +02001269 }
1270
Willy Tarreaub0821862019-07-18 19:26:11 +02001271
1272 /* here reuse might have been set above, indicating srv_conn finally
1273 * is OK.
1274 */
Willy Tarreau34601a82013-12-15 16:33:46 +01001275 if (reuse) {
1276 /* Disable connection reuse if a dynamic source is used.
1277 * As long as we don't share connections between servers,
1278 * we don't need to disable connection reuse on no-idempotent
1279 * requests nor when PROXY protocol is used.
1280 */
Willy Tarreau34601a82013-12-15 16:33:46 +01001281 if (srv && srv->conn_src.opts & CO_SRC_BIND) {
1282 if ((srv->conn_src.opts & CO_SRC_TPROXY_MASK) == CO_SRC_TPROXY_DYN)
1283 reuse = 0;
1284 }
1285 else if (s->be->conn_src.opts & CO_SRC_BIND) {
1286 if ((s->be->conn_src.opts & CO_SRC_TPROXY_MASK) == CO_SRC_TPROXY_DYN)
1287 reuse = 0;
1288 }
1289 }
Willy Tarreaub0821862019-07-18 19:26:11 +02001290
Olivier Houchardb3397362020-03-16 13:49:00 +01001291 if (ha_used_fds > global.tune.pool_high_count && srv && srv->idle_conns) {
Olivier Houchard88698d92019-04-16 19:07:22 +02001292 struct connection *tokill_conn;
1293
1294 /* We can't reuse a connection, and e have more FDs than deemd
1295 * acceptable, attempt to kill an idling connection
1296 */
1297 /* First, try from our own idle list */
Olivier Houcharddc2f2752020-02-13 19:12:07 +01001298 tokill_conn = MT_LIST_POP(&srv->idle_conns[tid],
Olivier Houchard88698d92019-04-16 19:07:22 +02001299 struct connection *, list);
1300 if (tokill_conn)
1301 tokill_conn->mux->destroy(tokill_conn->ctx);
1302 /* If not, iterate over other thread's idling pool, and try to grab one */
1303 else {
1304 int i;
1305
Willy Tarreauc35bcfc2020-06-29 14:43:16 +02001306 for (i = tid; (i = ((i + 1 == global.nbthread) ? 0 : i + 1)) != tid;) {
Willy Tarreau08e2b412019-05-26 11:50:08 +02001307 // just silence stupid gcc which reports an absurd
1308 // out-of-bounds warning for <i> which is always
1309 // exactly zero without threads, but it seems to
1310 // see it possibly larger.
1311 ALREADY_CHECKED(i);
1312
Olivier Houchardf8f4c2e2020-06-29 20:15:59 +02001313 HA_SPIN_LOCK(OTHER_LOCK, &idle_conns[tid].takeover_lock);
Olivier Houcharddc2f2752020-02-13 19:12:07 +01001314 tokill_conn = MT_LIST_POP(&srv->idle_conns[i],
Olivier Houchard88698d92019-04-16 19:07:22 +02001315 struct connection *, list);
Olivier Houcharddc2f2752020-02-13 19:12:07 +01001316 if (!tokill_conn)
1317 tokill_conn = MT_LIST_POP(&srv->safe_conns[i],
1318 struct connection *, list);
Olivier Houchard88698d92019-04-16 19:07:22 +02001319 if (tokill_conn) {
1320 /* We got one, put it into the concerned thread's to kill list, and wake it's kill task */
1321
Willy Tarreaua9d7b762020-07-10 08:28:20 +02001322 MT_LIST_ADDQ(&idle_conns[i].toremove_conns,
Olivier Houchard859dc802019-08-08 15:47:21 +02001323 (struct mt_list *)&tokill_conn->list);
Willy Tarreau4d82bf52020-06-28 00:19:17 +02001324 task_wakeup(idle_conns[i].cleanup_task, TASK_WOKEN_OTHER);
Olivier Houchardf8f4c2e2020-06-29 20:15:59 +02001325 HA_SPIN_UNLOCK(OTHER_LOCK, &idle_conns[tid].takeover_lock);
Olivier Houchard88698d92019-04-16 19:07:22 +02001326 break;
1327 }
Olivier Houchardf8f4c2e2020-06-29 20:15:59 +02001328 HA_SPIN_UNLOCK(OTHER_LOCK, &idle_conns[tid].takeover_lock);
Olivier Houchard88698d92019-04-16 19:07:22 +02001329 }
1330 }
1331
1332 }
Willy Tarreau34601a82013-12-15 16:33:46 +01001333
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001334 if (reuse) {
Willy Tarreaub0821862019-07-18 19:26:11 +02001335 if (srv_conn->mux) {
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001336 int avail = srv_conn->mux->avail_streams(srv_conn);
1337
1338 if (avail <= 1) {
Olivier Houchard2442f682018-12-01 17:03:38 +01001339 /* No more streams available, remove it from the list */
Olivier Houchardf0d4dff2020-03-06 18:12:03 +01001340 MT_LIST_DEL(&srv_conn->list);
Olivier Houchard2442f682018-12-01 17:03:38 +01001341 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001342
1343 if (avail >= 1) {
1344 srv_cs = srv_conn->mux->attach(srv_conn, s->sess);
Olivier Houchard2444aa52020-01-20 13:56:01 +01001345 if (srv_cs)
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001346 si_attach_cs(&s->si[1], srv_cs);
Olivier Houchard2444aa52020-01-20 13:56:01 +01001347 else
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001348 srv_conn = NULL;
1349 }
Olivier Houchard134a2042018-12-28 14:45:47 +01001350 else
1351 srv_conn = NULL;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001352 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001353 /* otherwise srv_conn is left intact */
1354 }
1355 else
1356 srv_conn = NULL;
1357
1358 /* no reuse or failed to reuse the connection above, pick a new one */
1359 if (!srv_conn) {
Christopher Faulet236c93b2020-07-02 09:19:54 +02001360 srv_conn = conn_new(s->target);
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001361 srv_cs = NULL;
Christopher Fauletc64badd2020-07-01 15:12:43 +02001362
Willy Tarreaudc2ac812020-07-15 17:46:32 +02001363 if (srv_conn) {
1364 srv_conn->owner = s->sess;
1365 if ((s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_NEVR)
1366 conn_set_private(srv_conn);
1367 }
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01001368 }
Willy Tarreau2c7dedd2019-01-24 18:22:19 +01001369
Olivier Houchardc0caac22020-03-20 14:26:32 +01001370 if (!srv_conn || !sockaddr_alloc(&srv_conn->dst)) {
1371 if (srv_conn)
1372 conn_free(srv_conn);
Willy Tarreaue7dff022015-04-03 01:14:29 +02001373 return SF_ERR_RESOURCE;
Olivier Houchardc0caac22020-03-20 14:26:32 +01001374 }
Willy Tarreau32e3c6a2013-10-11 19:34:20 +02001375
Willy Tarreaue7dff022015-04-03 01:14:29 +02001376 if (!(s->flags & SF_ADDR_SET)) {
Willy Tarreau1c8d32b2019-07-18 15:47:45 +02001377 err = assign_server_address(s);
Olivier Houchardc0caac22020-03-20 14:26:32 +01001378 if (err != SRV_STATUS_OK) {
1379 conn_free(srv_conn);
Willy Tarreaue7dff022015-04-03 01:14:29 +02001380 return SF_ERR_INTERNAL;
Olivier Houchardc0caac22020-03-20 14:26:32 +01001381 }
Willy Tarreaubaaee002006-06-26 02:48:02 +02001382 }
1383
Willy Tarreau1c8d32b2019-07-18 15:47:45 +02001384 /* copy the target address into the connection */
1385 *srv_conn->dst = *s->target_addr;
1386
1387 /* Copy network namespace from client connection */
1388 srv_conn->proxy_netns = cli_conn ? cli_conn->proxy_netns : NULL;
1389
Olivier Houchard9a86fcb2018-12-11 16:47:14 +01001390 if (!conn_xprt_ready(srv_conn) && !srv_conn->mux) {
Willy Tarreauff605db2013-12-20 11:09:51 +01001391 /* set the correct protocol on the output stream interface */
Christopher Faulet2bf88c02018-02-28 10:33:34 +01001392 if (srv)
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001393 conn_prepare(srv_conn, protocol_by_family(srv_conn->dst->ss_family), srv->xprt);
Willy Tarreauff605db2013-12-20 11:09:51 +01001394 else if (obj_type(s->target) == OBJ_TYPE_PROXY) {
1395 /* proxies exclusively run on raw_sock right now */
Willy Tarreauc0e16f22019-07-17 18:16:30 +02001396 conn_prepare(srv_conn, protocol_by_family(srv_conn->dst->ss_family), xprt_get(XPRT_RAW));
Olivier Houchardc0caac22020-03-20 14:26:32 +01001397 if (!(srv_conn->ctrl)) {
1398 conn_free(srv_conn);
Willy Tarreaue7dff022015-04-03 01:14:29 +02001399 return SF_ERR_INTERNAL;
Olivier Houchardc0caac22020-03-20 14:26:32 +01001400 }
Willy Tarreauff605db2013-12-20 11:09:51 +01001401 }
Olivier Houchardc0caac22020-03-20 14:26:32 +01001402 else {
1403 conn_free(srv_conn);
Willy Tarreaue7dff022015-04-03 01:14:29 +02001404 return SF_ERR_INTERNAL; /* how did we get there ? */
Olivier Houchardc0caac22020-03-20 14:26:32 +01001405 }
Willy Tarreaud02394b2012-05-11 18:32:18 +02001406
Olivier Houchard8af03b32020-01-22 17:34:54 +01001407 srv_cs = si_alloc_cs(&s->si[1], srv_conn);
1408 if (!srv_cs) {
1409 conn_free(srv_conn);
1410 return SF_ERR_RESOURCE;
1411 }
1412 srv_conn->ctx = srv_cs;
Olivier Houchardecffb7d2020-01-24 14:10:55 +01001413#if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation)
Olivier Houchard12950162018-11-23 14:32:08 +01001414 if (!srv ||
Christopher Fauletb4de4202020-07-30 09:10:36 +02001415 (srv->use_ssl != 1 || (!(srv->ssl_ctx.alpn_str) && !(srv->ssl_ctx.npn_str)) ||
1416 srv->mux_proto || s->be->mode != PR_MODE_HTTP))
Olivier Houchard201b9f42018-11-21 00:16:29 +01001417#endif
Olivier Houchard5cd62172019-01-04 15:52:26 +01001418 init_mux = 1;
Christopher Faulet08016ab2020-07-01 16:10:06 +02001419
Willy Tarreauff605db2013-12-20 11:09:51 +01001420 /* process the case where the server requires the PROXY protocol to be sent */
1421 srv_conn->send_proxy_ofs = 0;
Olivier Houchard522eea72017-11-03 16:27:47 +01001422
Willy Tarreau7b004922015-08-04 19:34:21 +02001423 if (srv && srv->pp_opts) {
Christopher Faulet21ddc742020-07-01 15:26:14 +02001424 conn_set_private(srv_conn);
Alexander Liu2a54bb72019-05-22 19:44:48 +08001425 srv_conn->flags |= CO_FL_SEND_PROXY;
Willy Tarreauff605db2013-12-20 11:09:51 +01001426 srv_conn->send_proxy_ofs = 1; /* must compute size */
Willy Tarreauff605db2013-12-20 11:09:51 +01001427 if (cli_conn)
Willy Tarreau3cc01d82019-07-17 11:27:38 +02001428 conn_get_dst(cli_conn);
Willy Tarreauff605db2013-12-20 11:09:51 +01001429 }
Willy Tarreau2a6e8802013-10-24 15:50:53 +02001430
Willy Tarreauff605db2013-12-20 11:09:51 +01001431 assign_tproxy_address(s);
Alexander Liu2a54bb72019-05-22 19:44:48 +08001432
1433 if (srv && (srv->flags & SRV_F_SOCKS4_PROXY)) {
1434 srv_conn->send_proxy_ofs = 1;
1435 srv_conn->flags |= CO_FL_SOCKS4;
1436 }
Willy Tarreauff605db2013-12-20 11:09:51 +01001437 }
Olivier Houchard9a86fcb2018-12-11 16:47:14 +01001438 else if (!conn_xprt_ready(srv_conn)) {
1439 if (srv_conn->mux->reset)
1440 srv_conn->mux->reset(srv_conn);
1441 }
Olivier Houcharde8f5f5d2019-10-25 17:00:54 +02001442 else {
1443 /* Only consider we're doing reuse if the connection was
1444 * ready.
1445 */
1446 if (srv_conn->mux->ctl(srv_conn, MUX_STATUS, NULL) & MUX_STATUS_READY)
1447 s->flags |= SF_SRV_REUSED;
1448 }
Willy Tarreaub1d67742010-03-29 19:36:59 +02001449
William Lallemandb7ff6a32012-03-02 14:35:21 +01001450 /* flag for logging source ip/port */
Willy Tarreaud0d8da92015-04-04 02:10:38 +02001451 if (strm_fe(s)->options2 & PR_O2_SRC_ADDR)
Willy Tarreau350f4872014-11-28 14:42:25 +01001452 s->si[1].flags |= SI_FL_SRC_ADDR;
William Lallemandb7ff6a32012-03-02 14:35:21 +01001453
Willy Tarreau14f8e862012-08-30 22:23:13 +02001454 /* disable lingering */
1455 if (s->be->options & PR_O_TCP_NOLING)
Willy Tarreau350f4872014-11-28 14:42:25 +01001456 s->si[1].flags |= SI_FL_NOLINGER;
Willy Tarreau14f8e862012-08-30 22:23:13 +02001457
Willy Tarreauf1573842018-12-14 11:35:36 +01001458 if (s->flags & SF_SRV_REUSED) {
Olivier Houchard237f7812019-03-08 18:49:07 +01001459 _HA_ATOMIC_ADD(&s->be->be_counters.reuse, 1);
Willy Tarreaucc79ed22018-12-15 15:11:36 +01001460 if (srv)
Olivier Houchard237f7812019-03-08 18:49:07 +01001461 _HA_ATOMIC_ADD(&srv->counters.reuse, 1);
Willy Tarreauf1573842018-12-14 11:35:36 +01001462 } else {
Olivier Houchard237f7812019-03-08 18:49:07 +01001463 _HA_ATOMIC_ADD(&s->be->be_counters.connect, 1);
Willy Tarreaucc79ed22018-12-15 15:11:36 +01001464 if (srv)
Olivier Houchard237f7812019-03-08 18:49:07 +01001465 _HA_ATOMIC_ADD(&srv->counters.connect, 1);
Willy Tarreauf1573842018-12-14 11:35:36 +01001466 }
1467
Olivier Houchard201b9f42018-11-21 00:16:29 +01001468 err = si_connect(&s->si[1], srv_conn);
Willy Tarreau09e02032019-07-18 16:18:20 +02001469 if (err != SF_ERR_NONE)
1470 return err;
1471
Christopher Faulet27bd6ff2020-07-01 11:00:18 +02001472#ifdef USE_OPENSSL
1473 if (srv && srv->ssl_ctx.sni) {
1474 struct sample *smp;
1475
1476 smp = sample_fetch_as_type(s->be, s->sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL,
1477 srv->ssl_ctx.sni, SMP_T_STR);
1478 if (smp_make_safe(smp)) {
1479 ssl_sock_set_servername(srv_conn, smp->data.u.str.area);
Christopher Faulet21ddc742020-07-01 15:26:14 +02001480 conn_set_private(srv_conn);
Christopher Faulet27bd6ff2020-07-01 11:00:18 +02001481 }
1482 }
1483#endif /* USE_OPENSSL */
1484
Willy Tarreaua3b17562020-07-31 08:39:31 +02001485 /* The CO_FL_SEND_PROXY flag may have been set by the connect method,
1486 * if so, add our handshake pseudo-XPRT now.
1487 */
1488 if ((srv_conn->flags & CO_FL_HANDSHAKE)) {
1489 if (xprt_add_hs(srv_conn) < 0) {
1490 conn_full_close(srv_conn);
1491 return SF_ERR_INTERNAL;
1492 }
1493 }
1494
Olivier Houchard5cd62172019-01-04 15:52:26 +01001495 /* We have to defer the mux initialization until after si_connect()
1496 * has been called, as we need the xprt to have been properly
1497 * initialized, or any attempt to recv during the mux init may
1498 * fail, and flag the connection as CO_FL_ERROR.
1499 */
1500 if (init_mux) {
Olivier Houchard74931142019-01-29 19:11:16 +01001501 if (conn_install_mux_be(srv_conn, srv_cs, s->sess) < 0) {
1502 conn_full_close(srv_conn);
Olivier Houchard5cd62172019-01-04 15:52:26 +01001503 return SF_ERR_INTERNAL;
Olivier Houchard74931142019-01-29 19:11:16 +01001504 }
Christopher Fauletaa278532020-06-30 14:47:46 +02001505 /* If we're doing http-reuse always, and the connection is not
1506 * private with available streams (an http2 connection), add it
Christopher Faulet08016ab2020-07-01 16:10:06 +02001507 * to the available list, so that others can use it right
1508 * away. If the connection is private, add it in the session
1509 * server list.
Olivier Houchard5cd62172019-01-04 15:52:26 +01001510 */
1511 if (srv && ((s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_ALWS) &&
Christopher Fauletaa278532020-06-30 14:47:46 +02001512 !(srv_conn->flags & CO_FL_PRIVATE) && srv_conn->mux->avail_streams(srv_conn) > 0)
Olivier Houchardf0d4dff2020-03-06 18:12:03 +01001513 LIST_ADDQ(&srv->available_conns[tid], mt_list_to_list(&srv_conn->list));
Christopher Faulet08016ab2020-07-01 16:10:06 +02001514 else if (srv_conn->flags & CO_FL_PRIVATE) {
Ilya Shipitsin6b79f382020-07-23 00:32:55 +05001515 /* If it fail now, the same will be done in mux->detach() callback */
Christopher Faulet08016ab2020-07-01 16:10:06 +02001516 session_add_conn(srv_conn->owner, srv_conn, srv_conn->target);
1517 }
Olivier Houchard5cd62172019-01-04 15:52:26 +01001518 }
Willy Tarreaubaaee002006-06-26 02:48:02 +02001519
Willy Tarreau5db847a2019-05-09 14:13:35 +02001520#if USE_OPENSSL && (defined(OPENSSL_IS_BORINGSSL) || (HA_OPENSSL_VERSION_NUMBER >= 0x10101000L))
Olivier Houchard4cd2af42019-05-06 15:18:27 +02001521
Olivier Houchard8694e5b2019-06-15 00:14:05 +02001522 if (!reuse && cli_conn && srv && srv_conn->mux &&
Olivier Houchard522eea72017-11-03 16:27:47 +01001523 (srv->ssl_ctx.options & SRV_SSL_O_EARLY_DATA) &&
Olivier Houchard865d8392019-05-03 22:46:27 +02001524 /* Only attempt to use early data if either the client sent
1525 * early data, so that we know it can handle a 425, or if
1526 * we are allwoed to retry requests on early data failure, and
1527 * it's our first try
1528 */
1529 ((cli_conn->flags & CO_FL_EARLY_DATA) ||
1530 ((s->be->retry_type & PR_RE_EARLY_ERROR) &&
1531 s->si[1].conn_retries == s->be->conn_retries)) &&
1532 !channel_is_empty(si_oc(&s->si[1])) &&
1533 srv_conn->flags & CO_FL_SSL_WAIT_HS)
Olivier Houchard522eea72017-11-03 16:27:47 +01001534 srv_conn->flags &= ~(CO_FL_SSL_WAIT_HS | CO_FL_WAIT_L6_CONN);
Willy Tarreau46c9d3e2017-11-08 14:25:59 +01001535#endif
Olivier Houchard522eea72017-11-03 16:27:47 +01001536
Willy Tarreau14f8e862012-08-30 22:23:13 +02001537 /* set connect timeout */
Willy Tarreau350f4872014-11-28 14:42:25 +01001538 s->si[1].exp = tick_add_ifset(now_ms, s->be->timeout.connect);
Willy Tarreau14f8e862012-08-30 22:23:13 +02001539
Willy Tarreau827aee92011-03-10 16:55:02 +01001540 if (srv) {
Christopher Faulet29f77e82017-06-08 14:04:45 +02001541 int count;
1542
Willy Tarreaue7dff022015-04-03 01:14:29 +02001543 s->flags |= SF_CURR_SESS;
Olivier Houchard237f7812019-03-08 18:49:07 +01001544 count = _HA_ATOMIC_ADD(&srv->cur_sess, 1);
Christopher Faulet29f77e82017-06-08 14:04:45 +02001545 HA_ATOMIC_UPDATE_MAX(&srv->counters.cur_sess_max, count);
Willy Tarreau51406232008-03-10 22:04:20 +01001546 if (s->be->lbprm.server_take_conn)
Willy Tarreau827aee92011-03-10 16:55:02 +01001547 s->be->lbprm.server_take_conn(srv);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001548 }
1549
Willy Tarreauada4c582020-03-04 16:42:03 +01001550 /* Now handle synchronously connected sockets. We know the stream-int
1551 * is at least in state SI_ST_CON. These ones typically are UNIX
1552 * sockets, socket pairs, and occasionally TCP connections on the
1553 * loopback on a heavily loaded system.
1554 */
1555 if ((srv_conn->flags & CO_FL_ERROR || srv_cs->flags & CS_FL_ERROR))
1556 s->si[1].flags |= SI_FL_ERR;
1557
1558 /* If we had early data, and the handshake ended, then
1559 * we can remove the flag, and attempt to wake the task up,
1560 * in the event there's an analyser waiting for the end of
1561 * the handshake.
1562 */
1563 if (!(srv_conn->flags & (CO_FL_WAIT_XPRT | CO_FL_EARLY_SSL_HS)))
1564 srv_cs->flags &= ~CS_FL_WAIT_FOR_HS;
1565
1566 if (!si_state_in(s->si[1].state, SI_SB_EST|SI_SB_DIS|SI_SB_CLO) &&
1567 (srv_conn->flags & CO_FL_WAIT_XPRT) == 0) {
1568 s->si[1].exp = TICK_ETERNITY;
1569 si_oc(&s->si[1])->flags |= CF_WRITE_NULL;
1570 if (s->si[1].state == SI_ST_CON)
1571 s->si[1].state = SI_ST_RDY;
1572 }
1573
1574 /* Report EOI on the channel if it was reached from the mux point of
1575 * view.
1576 *
1577 * Note: This test is only required because si_cs_process is also the SI
1578 * wake callback. Otherwise si_cs_recv()/si_cs_send() already take
1579 * care of it.
1580 */
1581 if ((srv_cs->flags & CS_FL_EOI) && !(si_ic(&s->si[1])->flags & CF_EOI))
1582 si_ic(&s->si[1])->flags |= (CF_EOI|CF_READ_PARTIAL);
1583
Christopher Faulet3f5bcd02020-07-29 22:42:27 +02001584 /* catch all sync connect while the mux is not already installed */
1585 if (!srv_conn->mux && !(srv_conn->flags & CO_FL_WAIT_XPRT)) {
1586 if (conn_create_mux(srv_conn) < 0) {
1587 conn_full_close(srv_conn);
1588 return SF_ERR_INTERNAL;
1589 }
1590 }
1591
Willy Tarreaue7dff022015-04-03 01:14:29 +02001592 return SF_ERR_NONE; /* connection is OK */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001593}
1594
1595
Willy Tarreaubaaee002006-06-26 02:48:02 +02001596/* This function performs the "redispatch" part of a connection attempt. It
1597 * will assign a server if required, queue the connection if required, and
1598 * handle errors that might arise at this level. It can change the server
1599 * state. It will return 1 if it encounters an error, switches the server
1600 * state, or has to queue a connection. Otherwise, it will return 0 indicating
1601 * that the connection is ready to use.
1602 */
1603
Willy Tarreau87b09662015-04-03 00:22:06 +02001604int srv_redispatch_connect(struct stream *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001605{
Willy Tarreau827aee92011-03-10 16:55:02 +01001606 struct server *srv;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001607 int conn_err;
1608
1609 /* We know that we don't have any connection pending, so we will
1610 * try to get a new one, and wait in this state if it's queued
1611 */
Willy Tarreau7c669d72008-06-20 15:04:11 +02001612 redispatch:
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001613 conn_err = assign_server_and_queue(s);
1614 srv = objt_server(s->target);
Willy Tarreau827aee92011-03-10 16:55:02 +01001615
Willy Tarreaubaaee002006-06-26 02:48:02 +02001616 switch (conn_err) {
1617 case SRV_STATUS_OK:
1618 break;
1619
Willy Tarreau7c669d72008-06-20 15:04:11 +02001620 case SRV_STATUS_FULL:
1621 /* The server has reached its maxqueue limit. Either PR_O_REDISP is set
1622 * and we can redispatch to another server, or it is not and we return
1623 * 503. This only makes sense in DIRECT mode however, because normal LB
1624 * algorithms would never select such a server, and hash algorithms
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001625 * would bring us on the same server again. Note that s->target is set
Willy Tarreau827aee92011-03-10 16:55:02 +01001626 * in this case.
Willy Tarreau7c669d72008-06-20 15:04:11 +02001627 */
Willy Tarreaue7dff022015-04-03 01:14:29 +02001628 if (((s->flags & (SF_DIRECT|SF_FORCE_PRST)) == SF_DIRECT) &&
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001629 (s->be->options & PR_O_REDISP)) {
Willy Tarreaue7dff022015-04-03 01:14:29 +02001630 s->flags &= ~(SF_DIRECT | SF_ASSIGNED | SF_ADDR_SET);
Willy Tarreau1c8d32b2019-07-18 15:47:45 +02001631 sockaddr_free(&s->target_addr);
Willy Tarreau7c669d72008-06-20 15:04:11 +02001632 goto redispatch;
1633 }
1634
Willy Tarreau350f4872014-11-28 14:42:25 +01001635 if (!s->si[1].err_type) {
1636 s->si[1].err_type = SI_ET_QUEUE_ERR;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001637 }
Willy Tarreau7c669d72008-06-20 15:04:11 +02001638
Olivier Houchard237f7812019-03-08 18:49:07 +01001639 _HA_ATOMIC_ADD(&srv->counters.failed_conns, 1);
1640 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreau7c669d72008-06-20 15:04:11 +02001641 return 1;
1642
Willy Tarreaubaaee002006-06-26 02:48:02 +02001643 case SRV_STATUS_NOSRV:
Willy Tarreau827aee92011-03-10 16:55:02 +01001644 /* note: it is guaranteed that srv == NULL here */
Willy Tarreau350f4872014-11-28 14:42:25 +01001645 if (!s->si[1].err_type) {
1646 s->si[1].err_type = SI_ET_CONN_ERR;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001647 }
Krzysztof Piotr Oledzki5a329cf2008-02-22 03:50:19 +01001648
Olivier Houchard237f7812019-03-08 18:49:07 +01001649 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001650 return 1;
1651
1652 case SRV_STATUS_QUEUED:
Willy Tarreau350f4872014-11-28 14:42:25 +01001653 s->si[1].exp = tick_add_ifset(now_ms, s->be->timeout.queue);
1654 s->si[1].state = SI_ST_QUE;
Willy Tarreau87b09662015-04-03 00:22:06 +02001655 /* do nothing else and do not wake any other stream up */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001656 return 1;
1657
Willy Tarreaubaaee002006-06-26 02:48:02 +02001658 case SRV_STATUS_INTERNAL:
1659 default:
Willy Tarreau350f4872014-11-28 14:42:25 +01001660 if (!s->si[1].err_type) {
1661 s->si[1].err_type = SI_ET_CONN_OTHER;
Willy Tarreaufa7e1022008-10-19 07:30:41 +02001662 }
1663
Willy Tarreau827aee92011-03-10 16:55:02 +01001664 if (srv)
1665 srv_inc_sess_ctr(srv);
1666 if (srv)
Bhaskar Maddalaa20cb852014-02-03 16:26:46 -05001667 srv_set_sess_last(srv);
1668 if (srv)
Olivier Houchard237f7812019-03-08 18:49:07 +01001669 _HA_ATOMIC_ADD(&srv->counters.failed_conns, 1);
1670 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001671
Willy Tarreau87b09662015-04-03 00:22:06 +02001672 /* release other streams waiting for this server */
Willy Tarreauf1fd9dc2014-04-24 20:47:57 +02001673 if (may_dequeue_tasks(srv, s->be))
Willy Tarreau827aee92011-03-10 16:55:02 +01001674 process_srv_queue(srv);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001675 return 1;
1676 }
1677 /* if we get here, it's because we got SRV_STATUS_OK, which also
1678 * means that the connection has not been queued.
1679 */
1680 return 0;
1681}
1682
Willy Tarreau3a9312a2020-01-09 18:43:15 +01001683/* Check if the connection request is in such a state that it can be aborted. */
1684static int back_may_abort_req(struct channel *req, struct stream *s)
1685{
1686 return ((req->flags & (CF_READ_ERROR)) ||
1687 ((req->flags & (CF_SHUTW_NOW|CF_SHUTW)) && /* empty and client aborted */
1688 (channel_is_empty(req) || (s->be->options & PR_O_ABRT_CLOSE))));
1689}
1690
1691/* Update back stream interface status for input states SI_ST_ASS, SI_ST_QUE,
1692 * SI_ST_TAR. Other input states are simply ignored.
1693 * Possible output states are SI_ST_CLO, SI_ST_TAR, SI_ST_ASS, SI_ST_REQ, SI_ST_CON
1694 * and SI_ST_EST. Flags must have previously been updated for timeouts and other
1695 * conditions.
1696 */
1697void back_try_conn_req(struct stream *s)
1698{
1699 struct server *srv = objt_server(s->target);
1700 struct stream_interface *si = &s->si[1];
1701 struct channel *req = &s->req;
1702
1703 DBG_TRACE_ENTER(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s);
1704
1705 if (si->state == SI_ST_ASS) {
1706 /* Server assigned to connection request, we have to try to connect now */
1707 int conn_err;
1708
1709 /* Before we try to initiate the connection, see if the
1710 * request may be aborted instead.
1711 */
1712 if (back_may_abort_req(req, s)) {
1713 si->err_type |= SI_ET_CONN_ABRT;
1714 DBG_TRACE_STATE("connection aborted", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s);
1715 goto abort_connection;
1716 }
1717
1718 conn_err = connect_server(s);
1719 srv = objt_server(s->target);
1720
1721 if (conn_err == SF_ERR_NONE) {
1722 /* state = SI_ST_CON or SI_ST_EST now */
1723 if (srv)
1724 srv_inc_sess_ctr(srv);
1725 if (srv)
1726 srv_set_sess_last(srv);
1727 DBG_TRACE_STATE("connection attempt", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s);
1728 goto end;
1729 }
1730
1731 /* We have received a synchronous error. We might have to
1732 * abort, retry immediately or redispatch.
1733 */
1734 if (conn_err == SF_ERR_INTERNAL) {
1735 if (!si->err_type) {
1736 si->err_type = SI_ET_CONN_OTHER;
1737 }
1738
1739 if (srv)
1740 srv_inc_sess_ctr(srv);
1741 if (srv)
1742 srv_set_sess_last(srv);
1743 if (srv)
1744 _HA_ATOMIC_ADD(&srv->counters.failed_conns, 1);
1745 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
1746
1747 /* release other streams waiting for this server */
1748 sess_change_server(s, NULL);
1749 if (may_dequeue_tasks(srv, s->be))
1750 process_srv_queue(srv);
1751
1752 /* Failed and not retryable. */
1753 si_shutr(si);
1754 si_shutw(si);
1755 req->flags |= CF_WRITE_ERROR;
1756
1757 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
1758
1759 /* we may need to know the position in the queue for logging */
1760 pendconn_cond_unlink(s->pend_pos);
1761
1762 /* no stream was ever accounted for this server */
1763 si->state = SI_ST_CLO;
1764 if (s->srv_error)
1765 s->srv_error(s, si);
1766 DBG_TRACE_STATE("internal error during connection", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s);
1767 goto end;
1768 }
1769
1770 /* We are facing a retryable error, but we don't want to run a
1771 * turn-around now, as the problem is likely a source port
1772 * allocation problem, so we want to retry now.
1773 */
1774 si->state = SI_ST_CER;
1775 si->flags &= ~SI_FL_ERR;
1776 back_handle_st_cer(s);
1777
1778 DBG_TRACE_STATE("connection error, retry", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s);
1779 /* now si->state is one of SI_ST_CLO, SI_ST_TAR, SI_ST_ASS, SI_ST_REQ */
1780 }
1781 else if (si->state == SI_ST_QUE) {
1782 /* connection request was queued, check for any update */
1783 if (!pendconn_dequeue(s)) {
1784 /* The connection is not in the queue anymore. Either
1785 * we have a server connection slot available and we
1786 * go directly to the assigned state, or we need to
1787 * load-balance first and go to the INI state.
1788 */
1789 si->exp = TICK_ETERNITY;
1790 if (unlikely(!(s->flags & SF_ASSIGNED)))
1791 si->state = SI_ST_REQ;
1792 else {
1793 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
1794 si->state = SI_ST_ASS;
1795 }
1796 DBG_TRACE_STATE("dequeue connection request", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s);
1797 goto end;
1798 }
1799
1800 /* Connection request still in queue... */
1801 if (si->flags & SI_FL_EXP) {
1802 /* ... and timeout expired */
1803 si->exp = TICK_ETERNITY;
1804 si->flags &= ~SI_FL_EXP;
1805 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
1806
1807 /* we may need to know the position in the queue for logging */
1808 pendconn_cond_unlink(s->pend_pos);
1809
1810 if (srv)
1811 _HA_ATOMIC_ADD(&srv->counters.failed_conns, 1);
1812 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
1813 si_shutr(si);
1814 si_shutw(si);
1815 req->flags |= CF_WRITE_TIMEOUT;
1816 if (!si->err_type)
1817 si->err_type = SI_ET_QUEUE_TO;
1818 si->state = SI_ST_CLO;
1819 if (s->srv_error)
1820 s->srv_error(s, si);
1821 DBG_TRACE_STATE("connection request still queued", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s);
1822 goto end;
1823 }
1824
1825 /* Connection remains in queue, check if we have to abort it */
1826 if (back_may_abort_req(req, s)) {
1827 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
1828
1829 /* we may need to know the position in the queue for logging */
1830 pendconn_cond_unlink(s->pend_pos);
1831
1832 si->err_type |= SI_ET_QUEUE_ABRT;
1833 DBG_TRACE_STATE("abort queued connection request", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s);
1834 goto abort_connection;
1835 }
1836
1837 /* Nothing changed */
1838 }
1839 else if (si->state == SI_ST_TAR) {
1840 /* Connection request might be aborted */
1841 if (back_may_abort_req(req, s)) {
1842 si->err_type |= SI_ET_CONN_ABRT;
1843 DBG_TRACE_STATE("connection aborted", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s);
1844 goto abort_connection;
1845 }
1846
1847 if (!(si->flags & SI_FL_EXP))
1848 return; /* still in turn-around */
1849
1850 si->flags &= ~SI_FL_EXP;
1851 si->exp = TICK_ETERNITY;
1852
1853 /* we keep trying on the same server as long as the stream is
1854 * marked "assigned".
1855 * FIXME: Should we force a redispatch attempt when the server is down ?
1856 */
1857 if (s->flags & SF_ASSIGNED)
1858 si->state = SI_ST_ASS;
1859 else
1860 si->state = SI_ST_REQ;
1861
1862 DBG_TRACE_STATE("retry connection now", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s);
1863 }
1864
1865 end:
1866 DBG_TRACE_LEAVE(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s);
1867 return;
1868
1869abort_connection:
1870 /* give up */
1871 si->exp = TICK_ETERNITY;
1872 si->flags &= ~SI_FL_EXP;
1873 si_shutr(si);
1874 si_shutw(si);
1875 si->state = SI_ST_CLO;
1876 if (s->srv_error)
1877 s->srv_error(s, si);
1878 DBG_TRACE_DEVEL("leaving on error", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s);
1879 return;
1880}
1881
1882/* This function initiates a server connection request on a stream interface
1883 * already in SI_ST_REQ state. Upon success, the state goes to SI_ST_ASS for
1884 * a real connection to a server, indicating that a server has been assigned,
1885 * or SI_ST_EST for a successful connection to an applet. It may also return
1886 * SI_ST_QUE, or SI_ST_CLO upon error.
1887 */
1888void back_handle_st_req(struct stream *s)
1889{
1890 struct stream_interface *si = &s->si[1];
1891
1892 if (si->state != SI_ST_REQ)
1893 return;
1894
1895 DBG_TRACE_ENTER(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s);
1896
1897 if (unlikely(obj_type(s->target) == OBJ_TYPE_APPLET)) {
1898 /* the applet directly goes to the EST state */
1899 struct appctx *appctx = objt_appctx(si->end);
1900
1901 if (!appctx || appctx->applet != __objt_applet(s->target))
1902 appctx = si_register_handler(si, objt_applet(s->target));
1903
1904 if (!appctx) {
1905 /* No more memory, let's immediately abort. Force the
1906 * error code to ignore the ERR_LOCAL which is not a
1907 * real error.
1908 */
1909 s->flags &= ~(SF_ERR_MASK | SF_FINST_MASK);
1910
1911 si_shutr(si);
1912 si_shutw(si);
1913 s->req.flags |= CF_WRITE_ERROR;
1914 si->err_type = SI_ET_CONN_RES;
1915 si->state = SI_ST_CLO;
1916 if (s->srv_error)
1917 s->srv_error(s, si);
1918 DBG_TRACE_STATE("failed to register applet", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s);
1919 goto end;
1920 }
1921
1922 if (tv_iszero(&s->logs.tv_request))
1923 s->logs.tv_request = now;
1924 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
1925 si->state = SI_ST_EST;
1926 si->err_type = SI_ET_NONE;
1927 be_set_sess_last(s->be);
1928
1929 DBG_TRACE_STATE("applet registered", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s);
1930 /* let back_establish() finish the job */
1931 goto end;
1932 }
1933
1934 /* Try to assign a server */
1935 if (srv_redispatch_connect(s) != 0) {
1936 /* We did not get a server. Either we queued the
1937 * connection request, or we encountered an error.
1938 */
1939 if (si->state == SI_ST_QUE) {
1940 DBG_TRACE_STATE("connection request queued", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s);
1941 goto end;
1942 }
1943
1944 /* we did not get any server, let's check the cause */
1945 si_shutr(si);
1946 si_shutw(si);
1947 s->req.flags |= CF_WRITE_ERROR;
1948 if (!si->err_type)
1949 si->err_type = SI_ET_CONN_OTHER;
1950 si->state = SI_ST_CLO;
1951 if (s->srv_error)
1952 s->srv_error(s, si);
1953 DBG_TRACE_STATE("connection request failed", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s);
1954 goto end;
1955 }
1956
1957 /* The server is assigned */
1958 s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
1959 si->state = SI_ST_ASS;
1960 be_set_sess_last(s->be);
1961 DBG_TRACE_STATE("connection request assigned to a server", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s);
1962
1963 end:
1964 DBG_TRACE_LEAVE(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s);
1965}
1966
1967/* This function is called with (si->state == SI_ST_CON) meaning that a
1968 * connection was attempted and that the file descriptor is already allocated.
1969 * We must check for timeout, error and abort. Possible output states are
1970 * SI_ST_CER (error), SI_ST_DIS (abort), and SI_ST_CON (no change). This only
1971 * works with connection-based streams. We know that there were no I/O event
1972 * when reaching this function. Timeouts and errors are *not* cleared.
1973 */
1974void back_handle_st_con(struct stream *s)
1975{
1976 struct stream_interface *si = &s->si[1];
1977 struct channel *req = &s->req;
1978 struct channel *rep = &s->res;
Willy Tarreau3a9312a2020-01-09 18:43:15 +01001979
1980 DBG_TRACE_ENTER(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s);
1981
1982 /* the client might want to abort */
1983 if ((rep->flags & CF_SHUTW) ||
1984 ((req->flags & CF_SHUTW_NOW) &&
1985 (channel_is_empty(req) || (s->be->options & PR_O_ABRT_CLOSE)))) {
1986 si->flags |= SI_FL_NOLINGER;
1987 si_shutw(si);
1988 si->err_type |= SI_ET_CONN_ABRT;
1989 if (s->srv_error)
1990 s->srv_error(s, si);
1991 /* Note: state = SI_ST_DIS now */
1992 DBG_TRACE_STATE("client abort during connection attempt", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s);
Willy Tarreau062df2c2020-01-10 06:17:03 +01001993 goto end;
1994 }
1995
Willy Tarreau062df2c2020-01-10 06:17:03 +01001996 done:
Willy Tarreau3a9312a2020-01-09 18:43:15 +01001997 /* retryable error ? */
Willy Tarreau062df2c2020-01-10 06:17:03 +01001998 if (si->flags & (SI_FL_EXP|SI_FL_ERR)) {
Willy Tarreau3a9312a2020-01-09 18:43:15 +01001999 if (!si->err_type) {
2000 if (si->flags & SI_FL_ERR)
2001 si->err_type = SI_ET_CONN_ERR;
2002 else
2003 si->err_type = SI_ET_CONN_TO;
2004 }
2005
2006 si->state = SI_ST_CER;
2007 DBG_TRACE_STATE("connection failed, retry", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s);
2008 }
2009
Willy Tarreau062df2c2020-01-10 06:17:03 +01002010 end:
Willy Tarreau3a9312a2020-01-09 18:43:15 +01002011 DBG_TRACE_LEAVE(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s);
2012}
2013
2014/* This function is called with (si->state == SI_ST_CER) meaning that a
2015 * previous connection attempt has failed and that the file descriptor
2016 * has already been released. Possible causes include asynchronous error
2017 * notification and time out. Possible output states are SI_ST_CLO when
2018 * retries are exhausted, SI_ST_TAR when a delay is wanted before a new
2019 * connection attempt, SI_ST_ASS when it's wise to retry on the same server,
2020 * and SI_ST_REQ when an immediate redispatch is wanted. The buffers are
2021 * marked as in error state. Timeouts and errors are cleared before retrying.
2022 */
2023void back_handle_st_cer(struct stream *s)
2024{
2025 struct stream_interface *si = &s->si[1];
2026 struct conn_stream *cs = objt_cs(si->end);
2027 struct connection *conn = cs_conn(cs);
2028
2029 DBG_TRACE_ENTER(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s);
2030
2031 si->exp = TICK_ETERNITY;
2032 si->flags &= ~SI_FL_EXP;
2033
2034 /* we probably have to release last stream from the server */
2035 if (objt_server(s->target)) {
2036 health_adjust(objt_server(s->target), HANA_STATUS_L4_ERR);
2037
2038 if (s->flags & SF_CURR_SESS) {
2039 s->flags &= ~SF_CURR_SESS;
2040 _HA_ATOMIC_SUB(&__objt_server(s->target)->cur_sess, 1);
2041 }
2042
2043 if ((si->flags & SI_FL_ERR) &&
2044 conn && conn->err_code == CO_ER_SSL_MISMATCH_SNI) {
2045 /* We tried to connect to a server which is configured
2046 * with "verify required" and which doesn't have the
2047 * "verifyhost" directive. The server presented a wrong
2048 * certificate (a certificate for an unexpected name),
2049 * which implies that we have used SNI in the handshake,
2050 * and that the server doesn't have the associated cert
2051 * and presented a default one.
2052 *
2053 * This is a serious enough issue not to retry. It's
2054 * especially important because this wrong name might
2055 * either be the result of a configuration error, and
2056 * retrying will only hammer the server, or is caused
2057 * by the use of a wrong SNI value, most likely
2058 * provided by the client and we don't want to let the
2059 * client provoke retries.
2060 */
2061 si->conn_retries = 0;
2062 DBG_TRACE_DEVEL("Bad SSL cert, disable connection retries", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s);
2063 }
2064 }
2065
2066 /* ensure that we have enough retries left */
2067 si->conn_retries--;
2068 if (si->conn_retries < 0 || !(s->be->retry_type & PR_RE_CONN_FAILED)) {
2069 if (!si->err_type) {
2070 si->err_type = SI_ET_CONN_ERR;
2071 }
2072
2073 if (objt_server(s->target))
2074 _HA_ATOMIC_ADD(&objt_server(s->target)->counters.failed_conns, 1);
2075 _HA_ATOMIC_ADD(&s->be->be_counters.failed_conns, 1);
2076 sess_change_server(s, NULL);
2077 if (may_dequeue_tasks(objt_server(s->target), s->be))
2078 process_srv_queue(objt_server(s->target));
2079
2080 /* shutw is enough so stop a connecting socket */
2081 si_shutw(si);
2082 s->req.flags |= CF_WRITE_ERROR;
2083 s->res.flags |= CF_READ_ERROR;
2084
2085 si->state = SI_ST_CLO;
2086 if (s->srv_error)
2087 s->srv_error(s, si);
2088
2089 DBG_TRACE_STATE("connection failed", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s);
2090 goto end;
2091 }
2092
2093 stream_choose_redispatch(s);
2094
2095 if (si->flags & SI_FL_ERR) {
2096 /* The error was an asynchronous connection error, and we will
2097 * likely have to retry connecting to the same server, most
2098 * likely leading to the same result. To avoid this, we wait
2099 * MIN(one second, connect timeout) before retrying. We don't
2100 * do it when the failure happened on a reused connection
2101 * though.
2102 */
2103
2104 int delay = 1000;
2105
2106 if (s->be->timeout.connect && s->be->timeout.connect < delay)
2107 delay = s->be->timeout.connect;
2108
2109 if (!si->err_type)
2110 si->err_type = SI_ET_CONN_ERR;
2111
2112 /* only wait when we're retrying on the same server */
2113 if ((si->state == SI_ST_ASS ||
2114 (s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_RR ||
2115 (s->be->srv_act <= 1)) && !(s->flags & SF_SRV_REUSED)) {
2116 si->state = SI_ST_TAR;
2117 si->exp = tick_add(now_ms, MS_TO_TICKS(delay));
2118 }
2119 si->flags &= ~SI_FL_ERR;
2120 DBG_TRACE_STATE("retry a new connection", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s);
2121 }
2122
2123 end:
2124 DBG_TRACE_LEAVE(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s);
2125}
2126
2127/* This function is called with (si->state == SI_ST_RDY) meaning that a
2128 * connection was attempted, that the file descriptor is already allocated,
2129 * and that it has succeeded. We must still check for errors and aborts.
2130 * Possible output states are SI_ST_EST (established), SI_ST_CER (error),
2131 * and SI_ST_DIS (abort). This only works with connection-based streams.
2132 * Timeouts and errors are *not* cleared.
2133 */
2134void back_handle_st_rdy(struct stream *s)
2135{
2136 struct stream_interface *si = &s->si[1];
2137 struct channel *req = &s->req;
2138 struct channel *rep = &s->res;
Willy Tarreau3a9312a2020-01-09 18:43:15 +01002139
2140 DBG_TRACE_ENTER(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s);
2141 /* We know the connection at least succeeded, though it could have
2142 * since met an error for any other reason. At least it didn't time out
2143 * eventhough the timeout might have been reported right after success.
2144 * We need to take care of various situations here :
2145 * - everything might be OK. We have to switch to established.
2146 * - an I/O error might have been reported after a successful transfer,
2147 * which is not retryable and needs to be logged correctly, and needs
2148 * established as well
2149 * - SI_ST_CON implies !CF_WROTE_DATA but not conversely as we could
2150 * have validated a connection with incoming data (e.g. TCP with a
2151 * banner protocol), or just a successful connect() probe.
2152 * - the client might have requested a connection abort, this needs to
2153 * be checked before we decide to retry anything.
2154 */
2155
2156 /* it's still possible to handle client aborts or connection retries
2157 * before any data were sent.
2158 */
2159 if (!(req->flags & CF_WROTE_DATA)) {
2160 /* client abort ? */
2161 if ((rep->flags & CF_SHUTW) ||
2162 ((req->flags & CF_SHUTW_NOW) &&
2163 (channel_is_empty(req) || (s->be->options & PR_O_ABRT_CLOSE)))) {
2164 /* give up */
2165 si->flags |= SI_FL_NOLINGER;
2166 si_shutw(si);
2167 si->err_type |= SI_ET_CONN_ABRT;
2168 if (s->srv_error)
2169 s->srv_error(s, si);
2170 DBG_TRACE_STATE("client abort during connection attempt", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s);
2171 goto end;
2172 }
2173
2174 /* retryable error ? */
2175 if (si->flags & SI_FL_ERR) {
Willy Tarreau3a9312a2020-01-09 18:43:15 +01002176 if (!si->err_type)
2177 si->err_type = SI_ET_CONN_ERR;
2178 si->state = SI_ST_CER;
2179 DBG_TRACE_STATE("connection failed, retry", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s);
2180 goto end;
2181 }
2182 }
2183
2184 /* data were sent and/or we had no error, back_establish() will
2185 * now take over.
2186 */
2187 DBG_TRACE_STATE("connection established", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s);
2188 si->err_type = SI_ET_NONE;
2189 si->state = SI_ST_EST;
2190
2191 end:
2192 DBG_TRACE_LEAVE(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s);
2193}
2194
Willy Tarreau4aac7db2014-05-16 11:48:10 +02002195/* sends a log message when a backend goes down, and also sets last
2196 * change date.
2197 */
2198void set_backend_down(struct proxy *be)
2199{
2200 be->last_change = now.tv_sec;
Olivier Houchard237f7812019-03-08 18:49:07 +01002201 _HA_ATOMIC_ADD(&be->down_trans, 1);
Willy Tarreau4aac7db2014-05-16 11:48:10 +02002202
Willy Tarreau6fb8dc12016-11-03 19:42:36 +01002203 if (!(global.mode & MODE_STARTING)) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01002204 ha_alert("%s '%s' has no server available!\n", proxy_type_str(be), be->id);
Willy Tarreau6fb8dc12016-11-03 19:42:36 +01002205 send_log(be, LOG_EMERG, "%s %s has no server available!\n", proxy_type_str(be), be->id);
2206 }
Willy Tarreau4aac7db2014-05-16 11:48:10 +02002207}
2208
Willy Tarreau87b09662015-04-03 00:22:06 +02002209/* Apply RDP cookie persistence to the current stream. For this, the function
Willy Tarreau44b90cc2010-05-24 20:27:29 +02002210 * tries to extract an RDP cookie from the request buffer, and look for the
2211 * matching server in the list. If the server is found, it is assigned to the
Willy Tarreau87b09662015-04-03 00:22:06 +02002212 * stream. This always returns 1, and the analyser removes itself from the
Willy Tarreau44b90cc2010-05-24 20:27:29 +02002213 * list. Nothing is performed if a server was already assigned.
2214 */
Willy Tarreau87b09662015-04-03 00:22:06 +02002215int tcp_persist_rdp_cookie(struct stream *s, struct channel *req, int an_bit)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02002216{
2217 struct proxy *px = s->be;
2218 int ret;
Willy Tarreau37406352012-04-23 16:16:37 +02002219 struct sample smp;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02002220 struct server *srv = px->srv;
Willy Tarreau04276f32017-01-06 17:41:29 +01002221 uint16_t port;
2222 uint32_t addr;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02002223 char *p;
2224
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002225 DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_TCP_ANA, s);
Willy Tarreau44b90cc2010-05-24 20:27:29 +02002226
Willy Tarreaue7dff022015-04-03 01:14:29 +02002227 if (s->flags & SF_ASSIGNED)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02002228 goto no_cookie;
2229
Willy Tarreau37406352012-04-23 16:16:37 +02002230 memset(&smp, 0, sizeof(smp));
Willy Tarreau44b90cc2010-05-24 20:27:29 +02002231
Willy Tarreaucadd8c92013-07-22 18:09:52 +02002232 ret = fetch_rdp_cookie_name(s, &smp, s->be->rdp_cookie_name, s->be->rdp_cookie_len);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002233 if (ret == 0 || (smp.flags & SMP_F_MAY_CHANGE) || smp.data.u.str.data == 0)
Willy Tarreau44b90cc2010-05-24 20:27:29 +02002234 goto no_cookie;
2235
Willy Tarreau04276f32017-01-06 17:41:29 +01002236 /* Considering an rdp cookie detected using acl, str ended with <cr><lf> and should return.
2237 * The cookie format is <ip> "." <port> where "ip" is the integer corresponding to the
2238 * server's IP address in network order, and "port" is the integer corresponding to the
2239 * server's port in network order. Comments please Emeric.
2240 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002241 addr = strtoul(smp.data.u.str.area, &p, 10);
Willy Tarreau44b90cc2010-05-24 20:27:29 +02002242 if (*p != '.')
2243 goto no_cookie;
2244 p++;
Willy Tarreau04276f32017-01-06 17:41:29 +01002245
2246 port = ntohs(strtoul(p, &p, 10));
Willy Tarreau44b90cc2010-05-24 20:27:29 +02002247 if (*p != '.')
2248 goto no_cookie;
2249
Willy Tarreau3fdb3662012-11-12 00:42:33 +01002250 s->target = NULL;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02002251 while (srv) {
Willy Tarreau28e9d062014-05-09 22:47:50 +02002252 if (srv->addr.ss_family == AF_INET &&
Willy Tarreau04276f32017-01-06 17:41:29 +01002253 port == srv->svc_port &&
2254 addr == ((struct sockaddr_in *)&srv->addr)->sin_addr.s_addr) {
Emeric Brun52a91d32017-08-31 14:41:55 +02002255 if ((srv->cur_state != SRV_ST_STOPPED) || (px->options & PR_O_PERSIST)) {
Willy Tarreau44b90cc2010-05-24 20:27:29 +02002256 /* we found the server and it is usable */
Willy Tarreaue7dff022015-04-03 01:14:29 +02002257 s->flags |= SF_DIRECT | SF_ASSIGNED;
Willy Tarreau3fdb3662012-11-12 00:42:33 +01002258 s->target = &srv->obj_type;
Willy Tarreau44b90cc2010-05-24 20:27:29 +02002259 break;
2260 }
2261 }
2262 srv = srv->next;
2263 }
2264
2265no_cookie:
2266 req->analysers &= ~an_bit;
2267 req->analyse_exp = TICK_ETERNITY;
Christopher Fauleteea8fc72019-11-05 16:18:10 +01002268 DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_TCP_ANA, s);
Willy Tarreau44b90cc2010-05-24 20:27:29 +02002269 return 1;
2270}
2271
Krzysztof Oledzki85130942007-10-22 16:21:10 +02002272int be_downtime(struct proxy *px) {
Willy Tarreaub625a082007-11-26 01:15:43 +01002273 if (px->lbprm.tot_weight && px->last_change < now.tv_sec) // ignore negative time
Krzysztof Oledzki85130942007-10-22 16:21:10 +02002274 return px->down_time;
2275
2276 return now.tv_sec - px->last_change + px->down_time;
2277}
Willy Tarreaubaaee002006-06-26 02:48:02 +02002278
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01002279/*
2280 * This function returns a string containing the balancing
2281 * mode of the proxy in a format suitable for stats.
2282 */
2283
2284const char *backend_lb_algo_str(int algo) {
2285
2286 if (algo == BE_LB_ALGO_RR)
2287 return "roundrobin";
2288 else if (algo == BE_LB_ALGO_SRR)
2289 return "static-rr";
Willy Tarreauf09c6602012-02-13 17:12:08 +01002290 else if (algo == BE_LB_ALGO_FAS)
2291 return "first";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01002292 else if (algo == BE_LB_ALGO_LC)
2293 return "leastconn";
2294 else if (algo == BE_LB_ALGO_SH)
2295 return "source";
2296 else if (algo == BE_LB_ALGO_UH)
2297 return "uri";
2298 else if (algo == BE_LB_ALGO_PH)
2299 return "url_param";
2300 else if (algo == BE_LB_ALGO_HH)
2301 return "hdr";
2302 else if (algo == BE_LB_ALGO_RCH)
2303 return "rdp-cookie";
Willy Tarreaub3e111b2016-11-26 15:52:04 +01002304 else if (algo == BE_LB_ALGO_NONE)
2305 return "none";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01002306 else
Willy Tarreaub3e111b2016-11-26 15:52:04 +01002307 return "unknown";
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +01002308}
2309
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002310/* This function parses a "balance" statement in a backend section describing
2311 * <curproxy>. It returns -1 if there is any error, otherwise zero. If it
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002312 * returns -1, it will write an error message into the <err> buffer which will
2313 * automatically be allocated and must be passed as NULL. The trailing '\n'
2314 * will not be written. The function must be called with <args> pointing to the
2315 * first word after "balance".
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002316 */
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002317int backend_parse_balance(const char **args, char **err, struct proxy *curproxy)
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002318{
2319 if (!*(args[0])) {
2320 /* if no option is set, use round-robin by default */
Willy Tarreau31682232007-11-29 15:38:04 +01002321 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2322 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002323 return 0;
2324 }
2325
2326 if (!strcmp(args[0], "roundrobin")) {
Willy Tarreau31682232007-11-29 15:38:04 +01002327 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2328 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002329 }
Willy Tarreau9757a382009-10-03 12:56:50 +02002330 else if (!strcmp(args[0], "static-rr")) {
2331 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2332 curproxy->lbprm.algo |= BE_LB_ALGO_SRR;
2333 }
Willy Tarreauf09c6602012-02-13 17:12:08 +01002334 else if (!strcmp(args[0], "first")) {
2335 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2336 curproxy->lbprm.algo |= BE_LB_ALGO_FAS;
2337 }
Willy Tarreau51406232008-03-10 22:04:20 +01002338 else if (!strcmp(args[0], "leastconn")) {
2339 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2340 curproxy->lbprm.algo |= BE_LB_ALGO_LC;
2341 }
Willy Tarreau21c741a2019-01-14 18:14:27 +01002342 else if (!strncmp(args[0], "random", 6)) {
Willy Tarreau760e81d2018-05-03 07:20:40 +02002343 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2344 curproxy->lbprm.algo |= BE_LB_ALGO_RND;
Willy Tarreau21c741a2019-01-14 18:14:27 +01002345 curproxy->lbprm.arg_opt1 = 2;
2346
2347 if (*(args[0] + 6) == '(' && *(args[0] + 7) != ')') { /* number of draws */
2348 const char *beg;
2349 char *end;
2350
2351 beg = args[0] + 7;
2352 curproxy->lbprm.arg_opt1 = strtol(beg, &end, 0);
2353
2354 if (*end != ')') {
2355 if (!*end)
2356 memprintf(err, "random : missing closing parenthesis.");
2357 else
2358 memprintf(err, "random : unexpected character '%c' after argument.", *end);
2359 return -1;
2360 }
2361
2362 if (curproxy->lbprm.arg_opt1 < 1) {
2363 memprintf(err, "random : number of draws must be at least 1.");
2364 return -1;
2365 }
2366 }
Willy Tarreau760e81d2018-05-03 07:20:40 +02002367 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002368 else if (!strcmp(args[0], "source")) {
Willy Tarreau31682232007-11-29 15:38:04 +01002369 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2370 curproxy->lbprm.algo |= BE_LB_ALGO_SH;
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002371 }
2372 else if (!strcmp(args[0], "uri")) {
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002373 int arg = 1;
2374
Willy Tarreau31682232007-11-29 15:38:04 +01002375 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2376 curproxy->lbprm.algo |= BE_LB_ALGO_UH;
Willy Tarreaua9a72492019-01-14 16:14:15 +01002377 curproxy->lbprm.arg_opt1 = 0; // "whole"
2378 curproxy->lbprm.arg_opt2 = 0; // "len"
2379 curproxy->lbprm.arg_opt3 = 0; // "depth"
Oskar Stolc8dc41842012-05-19 10:19:54 +01002380
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002381 while (*args[arg]) {
2382 if (!strcmp(args[arg], "len")) {
2383 if (!*args[arg+1] || (atoi(args[arg+1]) <= 0)) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002384 memprintf(err, "%s : '%s' expects a positive integer (got '%s').", args[0], args[arg], args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002385 return -1;
2386 }
Willy Tarreaua9a72492019-01-14 16:14:15 +01002387 curproxy->lbprm.arg_opt2 = atoi(args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002388 arg += 2;
2389 }
2390 else if (!strcmp(args[arg], "depth")) {
2391 if (!*args[arg+1] || (atoi(args[arg+1]) <= 0)) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002392 memprintf(err, "%s : '%s' expects a positive integer (got '%s').", args[0], args[arg], args[arg+1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002393 return -1;
2394 }
2395 /* hint: we store the position of the ending '/' (depth+1) so
2396 * that we avoid a comparison while computing the hash.
2397 */
Willy Tarreaua9a72492019-01-14 16:14:15 +01002398 curproxy->lbprm.arg_opt3 = atoi(args[arg+1]) + 1;
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002399 arg += 2;
2400 }
Oskar Stolc8dc41842012-05-19 10:19:54 +01002401 else if (!strcmp(args[arg], "whole")) {
Willy Tarreaua9a72492019-01-14 16:14:15 +01002402 curproxy->lbprm.arg_opt1 = 1;
Oskar Stolc8dc41842012-05-19 10:19:54 +01002403 arg += 1;
2404 }
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002405 else {
Oskar Stolc8dc41842012-05-19 10:19:54 +01002406 memprintf(err, "%s only accepts parameters 'len', 'depth', and 'whole' (got '%s').", args[0], args[arg]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002407 return -1;
2408 }
2409 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002410 }
Willy Tarreau01732802007-11-01 22:48:15 +01002411 else if (!strcmp(args[0], "url_param")) {
2412 if (!*args[1]) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002413 memprintf(err, "%s requires an URL parameter name.", args[0]);
Willy Tarreau01732802007-11-01 22:48:15 +01002414 return -1;
2415 }
Willy Tarreau31682232007-11-29 15:38:04 +01002416 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2417 curproxy->lbprm.algo |= BE_LB_ALGO_PH;
Willy Tarreaua534fea2008-08-03 12:19:50 +02002418
Willy Tarreau4c03d1c2019-01-14 15:23:54 +01002419 free(curproxy->lbprm.arg_str);
2420 curproxy->lbprm.arg_str = strdup(args[1]);
2421 curproxy->lbprm.arg_len = strlen(args[1]);
Marek Majkowski9c30fc12008-04-27 23:25:55 +02002422 if (*args[2]) {
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02002423 if (strcmp(args[2], "check_post")) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002424 memprintf(err, "%s only accepts 'check_post' modifier (got '%s').", args[0], args[2]);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02002425 return -1;
2426 }
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +02002427 }
Benoitaffb4812009-03-25 13:02:10 +01002428 }
2429 else if (!strncmp(args[0], "hdr(", 4)) {
2430 const char *beg, *end;
2431
2432 beg = args[0] + 4;
2433 end = strchr(beg, ')');
2434
2435 if (!end || end == beg) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002436 memprintf(err, "hdr requires an http header field name.");
Benoitaffb4812009-03-25 13:02:10 +01002437 return -1;
2438 }
2439
2440 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2441 curproxy->lbprm.algo |= BE_LB_ALGO_HH;
2442
Willy Tarreau484ff072019-01-14 15:28:53 +01002443 free(curproxy->lbprm.arg_str);
2444 curproxy->lbprm.arg_len = end - beg;
2445 curproxy->lbprm.arg_str = my_strndup(beg, end - beg);
Willy Tarreau9fed8582019-01-14 16:04:54 +01002446 curproxy->lbprm.arg_opt1 = 0;
Benoitaffb4812009-03-25 13:02:10 +01002447
2448 if (*args[1]) {
2449 if (strcmp(args[1], "use_domain_only")) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002450 memprintf(err, "%s only accepts 'use_domain_only' modifier (got '%s').", args[0], args[1]);
Benoitaffb4812009-03-25 13:02:10 +01002451 return -1;
2452 }
Willy Tarreau9fed8582019-01-14 16:04:54 +01002453 curproxy->lbprm.arg_opt1 = 1;
Benoitaffb4812009-03-25 13:02:10 +01002454 }
Emeric Brun736aa232009-06-30 17:56:00 +02002455 }
2456 else if (!strncmp(args[0], "rdp-cookie", 10)) {
2457 curproxy->lbprm.algo &= ~BE_LB_ALGO;
2458 curproxy->lbprm.algo |= BE_LB_ALGO_RCH;
2459
2460 if ( *(args[0] + 10 ) == '(' ) { /* cookie name */
2461 const char *beg, *end;
2462
2463 beg = args[0] + 11;
2464 end = strchr(beg, ')');
2465
2466 if (!end || end == beg) {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002467 memprintf(err, "rdp-cookie : missing cookie name.");
Emeric Brun736aa232009-06-30 17:56:00 +02002468 return -1;
2469 }
2470
Willy Tarreau484ff072019-01-14 15:28:53 +01002471 free(curproxy->lbprm.arg_str);
2472 curproxy->lbprm.arg_str = my_strndup(beg, end - beg);
2473 curproxy->lbprm.arg_len = end - beg;
Emeric Brun736aa232009-06-30 17:56:00 +02002474 }
2475 else if ( *(args[0] + 10 ) == '\0' ) { /* default cookie name 'mstshash' */
Willy Tarreau484ff072019-01-14 15:28:53 +01002476 free(curproxy->lbprm.arg_str);
2477 curproxy->lbprm.arg_str = strdup("mstshash");
2478 curproxy->lbprm.arg_len = strlen(curproxy->lbprm.arg_str);
Emeric Brun736aa232009-06-30 17:56:00 +02002479 }
2480 else { /* syntax */
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002481 memprintf(err, "rdp-cookie : missing cookie name.");
Emeric Brun736aa232009-06-30 17:56:00 +02002482 return -1;
2483 }
Willy Tarreau01732802007-11-01 22:48:15 +01002484 }
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002485 else {
Willy Tarreaua93c74b2012-05-08 18:14:39 +02002486 memprintf(err, "only supports 'roundrobin', 'static-rr', 'leastconn', 'source', 'uri', 'url_param', 'hdr(name)' and 'rdp-cookie(name)' options.");
Willy Tarreaua0cbda62007-11-01 21:39:54 +01002487 return -1;
2488 }
2489 return 0;
2490}
2491
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002492
2493/************************************************************************/
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002494/* All supported sample and ACL keywords must be declared here. */
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002495/************************************************************************/
2496
Willy Tarreau34db1082012-04-19 17:16:54 +02002497/* set temp integer to the number of enabled servers on the proxy.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002498 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002499 * undefined behaviour.
2500 */
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002501static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002502smp_fetch_nbsrv(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002503{
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002504 struct proxy *px;
2505
Willy Tarreau37406352012-04-23 16:16:37 +02002506 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002507 smp->data.type = SMP_T_SINT;
Willy Tarreau24e32d82012-04-23 23:55:44 +02002508 px = args->data.prx;
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002509
Nenad Merdanovic2754fbc2017-03-12 21:56:56 +01002510 smp->data.u.sint = be_usable_srv(px);
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002511
2512 return 1;
2513}
2514
Willy Tarreau37406352012-04-23 16:16:37 +02002515/* report in smp->flags a success or failure depending on the designated
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002516 * server's state. There is no match function involved since there's no pattern.
Willy Tarreau34db1082012-04-19 17:16:54 +02002517 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2518 * undefined behaviour.
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002519 */
2520static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002521smp_fetch_srv_is_up(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002522{
Willy Tarreau24e32d82012-04-23 23:55:44 +02002523 struct server *srv = args->data.srv;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002524
Willy Tarreau37406352012-04-23 16:16:37 +02002525 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002526 smp->data.type = SMP_T_BOOL;
Emeric Brun52a91d32017-08-31 14:41:55 +02002527 if (!(srv->cur_admin & SRV_ADMF_MAINT) &&
2528 (!(srv->check.state & CHK_ST_CONFIGURED) || (srv->cur_state != SRV_ST_STOPPED)))
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002529 smp->data.u.sint = 1;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002530 else
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002531 smp->data.u.sint = 0;
Willy Tarreau0b1cd942010-05-16 22:18:27 +02002532 return 1;
2533}
2534
Willy Tarreau34db1082012-04-19 17:16:54 +02002535/* set temp integer to the number of enabled servers on the proxy.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002536 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002537 * undefined behaviour.
2538 */
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002539static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002540smp_fetch_connslots(const struct arg *args, struct sample *smp, const char *kw, void *private)
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002541{
2542 struct server *iterator;
Willy Tarreaud28c3532012-04-19 19:28:33 +02002543
Willy Tarreau37406352012-04-23 16:16:37 +02002544 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002545 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002546 smp->data.u.sint = 0;
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002547
Willy Tarreau24e32d82012-04-23 23:55:44 +02002548 for (iterator = args->data.prx->srv; iterator; iterator = iterator->next) {
Emeric Brun52a91d32017-08-31 14:41:55 +02002549 if (iterator->cur_state == SRV_ST_STOPPED)
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002550 continue;
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002551
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002552 if (iterator->maxconn == 0 || iterator->maxqueue == 0) {
Willy Tarreaua5e37562011-12-16 17:06:15 +01002553 /* configuration is stupid */
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002554 smp->data.u.sint = -1; /* FIXME: stupid value! */
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002555 return 1;
2556 }
2557
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002558 smp->data.u.sint += (iterator->maxconn - iterator->cur_sess)
Willy Tarreau422aa072012-04-20 20:49:27 +02002559 + (iterator->maxqueue - iterator->nbpend);
Jeffrey 'jf' Lim5051d7b2008-09-04 01:03:03 +08002560 }
2561
2562 return 1;
2563}
2564
Willy Tarreaua5e37562011-12-16 17:06:15 +01002565/* set temp integer to the id of the backend */
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002566static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002567smp_fetch_be_id(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau37406352012-04-23 16:16:37 +02002568{
Christopher Fauletd1b44642020-04-30 09:51:15 +02002569 struct proxy *px = NULL;
2570
2571 if (smp->strm)
2572 px = smp->strm->be;
Christopher Fauletf98e6262020-05-06 09:42:04 +02002573 else if (obj_type(smp->sess->origin) == OBJ_TYPE_CHECK)
Christopher Fauletd1b44642020-04-30 09:51:15 +02002574 px = __objt_check(smp->sess->origin)->proxy;
2575 if (!px)
Willy Tarreaube508f12016-03-10 11:47:01 +01002576 return 0;
2577
Willy Tarreauf853c462012-04-23 18:53:56 +02002578 smp->flags = SMP_F_VOL_TXN;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002579 smp->data.type = SMP_T_SINT;
Christopher Fauletd1b44642020-04-30 09:51:15 +02002580 smp->data.u.sint = px->uuid;
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002581 return 1;
2582}
2583
Marcin Deranekd2471c22016-12-12 14:08:05 +01002584/* set string to the name of the backend */
2585static int
2586smp_fetch_be_name(const struct arg *args, struct sample *smp, const char *kw, void *private)
2587{
Christopher Fauletd1b44642020-04-30 09:51:15 +02002588 struct proxy *px = NULL;
2589
2590 if (smp->strm)
2591 px = smp->strm->be;
Christopher Fauletf98e6262020-05-06 09:42:04 +02002592 else if (obj_type(smp->sess->origin) == OBJ_TYPE_CHECK)
Christopher Fauletd1b44642020-04-30 09:51:15 +02002593 px = __objt_check(smp->sess->origin)->proxy;
2594 if (!px)
Marcin Deranekd2471c22016-12-12 14:08:05 +01002595 return 0;
2596
Christopher Fauletd1b44642020-04-30 09:51:15 +02002597 smp->data.u.str.area = (char *)px->id;
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002598 if (!smp->data.u.str.area)
Marcin Deranekd2471c22016-12-12 14:08:05 +01002599 return 0;
2600
2601 smp->data.type = SMP_T_STR;
2602 smp->flags = SMP_F_CONST;
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002603 smp->data.u.str.data = strlen(smp->data.u.str.area);
Marcin Deranekd2471c22016-12-12 14:08:05 +01002604
2605 return 1;
2606}
2607
Willy Tarreaua5e37562011-12-16 17:06:15 +01002608/* set temp integer to the id of the server */
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002609static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002610smp_fetch_srv_id(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau37406352012-04-23 16:16:37 +02002611{
Christopher Fauletd1b44642020-04-30 09:51:15 +02002612 struct server *srv = NULL;
Willy Tarreaube508f12016-03-10 11:47:01 +01002613
Christopher Fauletd1b44642020-04-30 09:51:15 +02002614 if (smp->strm)
2615 srv = objt_server(smp->strm->target);
Christopher Fauletf98e6262020-05-06 09:42:04 +02002616 else if (obj_type(smp->sess->origin) == OBJ_TYPE_CHECK)
Christopher Fauletd1b44642020-04-30 09:51:15 +02002617 srv = __objt_check(smp->sess->origin)->server;
2618 if (!srv)
Willy Tarreau17af4192011-02-23 14:27:06 +01002619 return 0;
2620
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002621 smp->data.type = SMP_T_SINT;
Christopher Fauletd1b44642020-04-30 09:51:15 +02002622 smp->data.u.sint = srv->puid;
Hervé COMMOWICK35ed8012010-12-15 14:04:51 +01002623
2624 return 1;
2625}
2626
vkill1dfd1652019-10-30 16:58:14 +08002627/* set string to the name of the server */
2628static int
2629smp_fetch_srv_name(const struct arg *args, struct sample *smp, const char *kw, void *private)
2630{
Christopher Fauletd1b44642020-04-30 09:51:15 +02002631 struct server *srv = NULL;
vkill1dfd1652019-10-30 16:58:14 +08002632
Christopher Fauletd1b44642020-04-30 09:51:15 +02002633 if (smp->strm)
2634 srv = objt_server(smp->strm->target);
Christopher Fauletf98e6262020-05-06 09:42:04 +02002635 else if (obj_type(smp->sess->origin) == OBJ_TYPE_CHECK)
Christopher Fauletd1b44642020-04-30 09:51:15 +02002636 srv = __objt_check(smp->sess->origin)->server;
2637 if (!srv)
vkill1dfd1652019-10-30 16:58:14 +08002638 return 0;
2639
Christopher Fauletd1b44642020-04-30 09:51:15 +02002640 smp->data.u.str.area = srv->id;
vkill1dfd1652019-10-30 16:58:14 +08002641 if (!smp->data.u.str.area)
2642 return 0;
2643
2644 smp->data.type = SMP_T_STR;
2645 smp->data.u.str.data = strlen(smp->data.u.str.area);
2646
2647 return 1;
2648}
2649
Willy Tarreau34db1082012-04-19 17:16:54 +02002650/* set temp integer to the number of connections per second reaching the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002651 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002652 * undefined behaviour.
2653 */
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002654static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002655smp_fetch_be_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002656{
Willy Tarreau37406352012-04-23 16:16:37 +02002657 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002658 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002659 smp->data.u.sint = read_freq_ctr(&args->data.prx->be_sess_per_sec);
Willy Tarreau079ff0a2009-03-05 21:34:28 +01002660 return 1;
2661}
2662
Willy Tarreau34db1082012-04-19 17:16:54 +02002663/* set temp integer to the number of concurrent connections on the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002664 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002665 * undefined behaviour.
2666 */
Willy Tarreaua36af912009-10-10 12:02:45 +02002667static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002668smp_fetch_be_conn(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002669{
Willy Tarreau37406352012-04-23 16:16:37 +02002670 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002671 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002672 smp->data.u.sint = args->data.prx->beconn;
Willy Tarreaua36af912009-10-10 12:02:45 +02002673 return 1;
2674}
2675
Patrick Hemmer4cdf3ab2018-06-14 17:10:27 -04002676/* set temp integer to the number of available connections across available
2677 * servers on the backend.
2678 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
2679 * undefined behaviour.
2680 */
2681static int
2682smp_fetch_be_conn_free(const struct arg *args, struct sample *smp, const char *kw, void *private)
2683{
2684 struct server *iterator;
2685 struct proxy *px;
2686 unsigned int maxconn;
2687
2688 smp->flags = SMP_F_VOL_TEST;
2689 smp->data.type = SMP_T_SINT;
2690 smp->data.u.sint = 0;
2691
2692 for (iterator = args->data.prx->srv; iterator; iterator = iterator->next) {
2693 if (iterator->cur_state == SRV_ST_STOPPED)
2694 continue;
2695
2696 px = iterator->proxy;
2697 if (!srv_currently_usable(iterator) ||
2698 ((iterator->flags & SRV_F_BACKUP) &&
2699 (px->srv_act || (iterator != px->lbprm.fbck && !(px->options & PR_O_USE_ALL_BK)))))
2700 continue;
2701
2702 if (iterator->maxconn == 0) {
2703 /* one active server is unlimited, return -1 */
2704 smp->data.u.sint = -1;
2705 return 1;
2706 }
2707
2708 maxconn = srv_dynamic_maxconn(iterator);
2709 if (maxconn > iterator->cur_sess)
2710 smp->data.u.sint += maxconn - iterator->cur_sess;
2711 }
2712
2713 return 1;
2714}
2715
Willy Tarreau34db1082012-04-19 17:16:54 +02002716/* set temp integer to the total number of queued connections on the backend.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002717 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002718 * undefined behaviour.
2719 */
Willy Tarreaua36af912009-10-10 12:02:45 +02002720static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002721smp_fetch_queue_size(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002722{
Willy Tarreau37406352012-04-23 16:16:37 +02002723 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002724 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002725 smp->data.u.sint = args->data.prx->totpend;
Willy Tarreaua36af912009-10-10 12:02:45 +02002726 return 1;
2727}
2728
Willy Tarreaua5e37562011-12-16 17:06:15 +01002729/* set temp integer to the total number of queued connections on the backend divided
Willy Tarreaua36af912009-10-10 12:02:45 +02002730 * by the number of running servers and rounded up. If there is no running
2731 * server, we return twice the total, just as if we had half a running server.
2732 * This is more or less correct anyway, since we expect the last server to come
2733 * back soon.
Willy Tarreau0146c2e2012-04-20 11:37:56 +02002734 * Accepts exactly 1 argument. Argument is a backend, other types will lead to
Willy Tarreau34db1082012-04-19 17:16:54 +02002735 * undefined behaviour.
Willy Tarreaua36af912009-10-10 12:02:45 +02002736 */
2737static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002738smp_fetch_avg_queue_size(const struct arg *args, struct sample *smp, const char *kw, void *private)
Willy Tarreaua36af912009-10-10 12:02:45 +02002739{
2740 int nbsrv;
Thierry FOURNIER0a9a2b82015-05-11 15:20:49 +02002741 struct proxy *px;
Willy Tarreaua36af912009-10-10 12:02:45 +02002742
Willy Tarreau37406352012-04-23 16:16:37 +02002743 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002744 smp->data.type = SMP_T_SINT;
Willy Tarreau24e32d82012-04-23 23:55:44 +02002745 px = args->data.prx;
Willy Tarreaua36af912009-10-10 12:02:45 +02002746
Nenad Merdanovic2754fbc2017-03-12 21:56:56 +01002747 nbsrv = be_usable_srv(px);
Willy Tarreaua36af912009-10-10 12:02:45 +02002748
2749 if (nbsrv > 0)
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002750 smp->data.u.sint = (px->totpend + nbsrv - 1) / nbsrv;
Willy Tarreaua36af912009-10-10 12:02:45 +02002751 else
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002752 smp->data.u.sint = px->totpend * 2;
Willy Tarreaua36af912009-10-10 12:02:45 +02002753
2754 return 1;
2755}
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002756
Willy Tarreau34db1082012-04-19 17:16:54 +02002757/* set temp integer to the number of concurrent connections on the server in the backend.
2758 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2759 * undefined behaviour.
2760 */
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002761static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002762smp_fetch_srv_conn(const struct arg *args, struct sample *smp, const char *kw, void *private)
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002763{
Willy Tarreauf853c462012-04-23 18:53:56 +02002764 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002765 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002766 smp->data.u.sint = args->data.srv->cur_sess;
Hervé COMMOWICKdaa824e2011-08-05 12:09:44 +02002767 return 1;
2768}
2769
Patrick Hemmer155e93e2018-06-14 18:01:35 -04002770/* set temp integer to the number of available connections on the server in the backend.
2771 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2772 * undefined behaviour.
2773 */
2774static int
2775smp_fetch_srv_conn_free(const struct arg *args, struct sample *smp, const char *kw, void *private)
2776{
2777 unsigned int maxconn;
2778
2779 smp->flags = SMP_F_VOL_TEST;
2780 smp->data.type = SMP_T_SINT;
2781
2782 if (args->data.srv->maxconn == 0) {
2783 /* one active server is unlimited, return -1 */
2784 smp->data.u.sint = -1;
2785 return 1;
2786 }
2787
2788 maxconn = srv_dynamic_maxconn(args->data.srv);
2789 if (maxconn > args->data.srv->cur_sess)
2790 smp->data.u.sint = maxconn - args->data.srv->cur_sess;
2791 else
2792 smp->data.u.sint = 0;
2793
2794 return 1;
2795}
2796
Willy Tarreauff2b7af2017-10-13 11:46:26 +02002797/* set temp integer to the number of connections pending in the server's queue.
2798 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2799 * undefined behaviour.
2800 */
2801static int
2802smp_fetch_srv_queue(const struct arg *args, struct sample *smp, const char *kw, void *private)
2803{
2804 smp->flags = SMP_F_VOL_TEST;
2805 smp->data.type = SMP_T_SINT;
2806 smp->data.u.sint = args->data.srv->nbpend;
2807 return 1;
2808}
2809
Tait Clarridge7896d522012-12-05 21:39:31 -05002810/* set temp integer to the number of enabled servers on the proxy.
2811 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2812 * undefined behaviour.
2813 */
2814static int
Thierry FOURNIER0786d052015-05-11 15:42:45 +02002815smp_fetch_srv_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
Tait Clarridge7896d522012-12-05 21:39:31 -05002816{
2817 smp->flags = SMP_F_VOL_TEST;
Thierry FOURNIER8c542ca2015-08-19 09:00:18 +02002818 smp->data.type = SMP_T_SINT;
Thierry FOURNIER136f9d32015-08-19 09:07:19 +02002819 smp->data.u.sint = read_freq_ctr(&args->data.srv->sess_per_sec);
Tait Clarridge7896d522012-12-05 21:39:31 -05002820 return 1;
2821}
2822
Christopher Faulet1bea8652020-07-10 16:03:45 +02002823/* set temp integer to the server weight.
2824 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2825 * undefined behaviour.
2826 */
2827static int
2828smp_fetch_srv_weight(const struct arg *args, struct sample *smp, const char *kw, void *private)
2829{
2830 struct server *srv = args->data.srv;
2831 struct proxy *px = srv->proxy;
2832
2833 smp->flags = SMP_F_VOL_TEST;
2834 smp->data.type = SMP_T_SINT;
2835 smp->data.u.sint = (srv->cur_eweight * px->lbprm.wmult + px->lbprm.wdiv - 1) / px->lbprm.wdiv;
2836 return 1;
2837}
2838
2839/* set temp integer to the server initial weight.
2840 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2841 * undefined behaviour.
2842 */
2843static int
2844smp_fetch_srv_iweight(const struct arg *args, struct sample *smp, const char *kw, void *private)
2845{
2846 smp->flags = SMP_F_VOL_TEST;
2847 smp->data.type = SMP_T_SINT;
2848 smp->data.u.sint = args->data.srv->iweight;
2849 return 1;
2850}
2851
2852/* set temp integer to the server user-specified weight.
2853 * Accepts exactly 1 argument. Argument is a server, other types will lead to
2854 * undefined behaviour.
2855 */
2856static int
2857smp_fetch_srv_uweight(const struct arg *args, struct sample *smp, const char *kw, void *private)
2858{
2859 smp->flags = SMP_F_VOL_TEST;
2860 smp->data.type = SMP_T_SINT;
2861 smp->data.u.sint = args->data.srv->uweight;
2862 return 1;
2863}
2864
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002865static int sample_conv_nbsrv(const struct arg *args, struct sample *smp, void *private)
2866{
2867
2868 struct proxy *px;
2869
2870 if (!smp_make_safe(smp))
2871 return 0;
2872
Willy Tarreau843b7cb2018-07-13 10:54:26 +02002873 px = proxy_find_by_name(smp->data.u.str.area, PR_CAP_BE, 0);
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002874 if (!px)
2875 return 0;
2876
2877 smp->data.type = SMP_T_SINT;
2878 smp->data.u.sint = be_usable_srv(px);
2879
2880 return 1;
2881}
2882
Nenad Merdanovic177adc92019-08-27 01:58:13 +02002883static int
2884sample_conv_srv_queue(const struct arg *args, struct sample *smp, void *private)
2885{
2886 struct proxy *px;
2887 struct server *srv;
2888 char *bksep;
2889
2890 if (!smp_make_safe(smp))
2891 return 0;
2892
2893 bksep = strchr(smp->data.u.str.area, '/');
2894
2895 if (bksep) {
2896 *bksep = '\0';
2897 px = proxy_find_by_name(smp->data.u.str.area, PR_CAP_BE, 0);
2898 if (!px)
2899 return 0;
2900 smp->data.u.str.area = bksep + 1;
2901 } else {
2902 if (!(smp->px->cap & PR_CAP_BE))
2903 return 0;
2904 px = smp->px;
2905 }
2906
2907 srv = server_find_by_name(px, smp->data.u.str.area);
2908 if (!srv)
2909 return 0;
2910
2911 smp->data.type = SMP_T_SINT;
2912 smp->data.u.sint = srv->nbpend;
2913 return 1;
2914}
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002915
2916/* Note: must not be declared <const> as its list will be overwritten.
2917 * Please take care of keeping this list alphabetically sorted.
2918 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002919static struct sample_fetch_kw_list smp_kws = {ILH, {
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002920 { "avg_queue", smp_fetch_avg_queue_size, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2921 { "be_conn", smp_fetch_be_conn, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Patrick Hemmer4cdf3ab2018-06-14 17:10:27 -04002922 { "be_conn_free", smp_fetch_be_conn_free, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002923 { "be_id", smp_fetch_be_id, 0, NULL, SMP_T_SINT, SMP_USE_BKEND, },
Marcin Deranekd2471c22016-12-12 14:08:05 +01002924 { "be_name", smp_fetch_be_name, 0, NULL, SMP_T_STR, SMP_USE_BKEND, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002925 { "be_sess_rate", smp_fetch_be_sess_rate, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2926 { "connslots", smp_fetch_connslots, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2927 { "nbsrv", smp_fetch_nbsrv, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2928 { "queue", smp_fetch_queue_size, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2929 { "srv_conn", smp_fetch_srv_conn, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Patrick Hemmer155e93e2018-06-14 18:01:35 -04002930 { "srv_conn_free", smp_fetch_srv_conn_free, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002931 { "srv_id", smp_fetch_srv_id, 0, NULL, SMP_T_SINT, SMP_USE_SERVR, },
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002932 { "srv_is_up", smp_fetch_srv_is_up, ARG1(1,SRV), NULL, SMP_T_BOOL, SMP_USE_INTRN, },
vkill1dfd1652019-10-30 16:58:14 +08002933 { "srv_name", smp_fetch_srv_name, 0, NULL, SMP_T_STR, SMP_USE_SERVR, },
Willy Tarreauff2b7af2017-10-13 11:46:26 +02002934 { "srv_queue", smp_fetch_srv_queue, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Thierry FOURNIER07ee64e2015-07-06 23:43:03 +02002935 { "srv_sess_rate", smp_fetch_srv_sess_rate, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Christopher Faulet1bea8652020-07-10 16:03:45 +02002936 { "srv_weight", smp_fetch_srv_weight, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2937 { "srv_iweight", smp_fetch_srv_iweight, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
2938 { "srv_uweight", smp_fetch_srv_uweight, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002939 { /* END */ },
2940}};
2941
Willy Tarreau0108d902018-11-25 19:14:37 +01002942INITCALL1(STG_REGISTER, sample_register_fetches, &smp_kws);
2943
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002944/* Note: must not be declared <const> as its list will be overwritten */
2945static struct sample_conv_kw_list sample_conv_kws = {ILH, {
Nenad Merdanovic177adc92019-08-27 01:58:13 +02002946 { "nbsrv", sample_conv_nbsrv, 0, NULL, SMP_T_STR, SMP_T_SINT },
2947 { "srv_queue", sample_conv_srv_queue, 0, NULL, SMP_T_STR, SMP_T_SINT },
Nenad Merdanovicb7e7c472017-03-12 21:56:55 +01002948 { /* END */ },
2949}};
2950
Willy Tarreau0108d902018-11-25 19:14:37 +01002951INITCALL1(STG_REGISTER, sample_register_convs, &sample_conv_kws);
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002952
Willy Tarreau61612d42012-04-19 18:42:05 +02002953/* Note: must not be declared <const> as its list will be overwritten.
2954 * Please take care of keeping this list alphabetically sorted.
2955 */
Willy Tarreaudc13c112013-06-21 23:16:39 +02002956static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreau1a7eca12013-01-07 22:38:03 +01002957 { /* END */ },
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002958}};
2959
Willy Tarreau0108d902018-11-25 19:14:37 +01002960INITCALL1(STG_REGISTER, acl_register_keywords, &acl_kws);
Willy Tarreaua9d3c1e2007-11-30 20:48:53 +01002961
Willy Tarreaubaaee002006-06-26 02:48:02 +02002962/*
2963 * Local variables:
2964 * c-indent-level: 8
2965 * c-basic-offset: 8
2966 * End:
2967 */