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Willy Tarreaubaaee002006-06-26 02:48:02 +02001/*
2 * Proxy variables and functions.
3 *
Willy Tarreau3a7d2072009-03-05 23:48:25 +01004 * Copyright 2000-2009 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 <fcntl.h>
14#include <unistd.h>
Willy Tarreauc8f24f82007-11-30 18:38:35 +010015#include <string.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020016#include <sys/types.h>
17#include <sys/socket.h>
18#include <sys/stat.h>
19
Willy Tarreau2dd0d472006-06-29 17:53:05 +020020#include <common/defaults.h>
Willy Tarreau9de1bbd2008-07-09 20:34:27 +020021#include <common/cfgparse.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020022#include <common/compat.h>
Willy Tarreaue3ba5f02006-06-29 18:54:54 +020023#include <common/config.h>
Willy Tarreaud740bab2007-10-28 11:14:07 +010024#include <common/errors.h>
Willy Tarreau0108d902018-11-25 19:14:37 +010025#include <common/initcall.h>
Willy Tarreau4d2d0982007-05-14 00:39:29 +020026#include <common/memory.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020027#include <common/time.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020028
Willy Tarreaucfd837f2014-03-15 07:43:51 +010029#include <eb32tree.h>
30#include <ebistree.h>
31
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +020032#include <types/capture.h>
Willy Tarreau960f2cb2016-11-24 12:02:29 +010033#include <types/cli.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020034#include <types/global.h>
Willy Tarreau3fdb3662012-11-12 00:42:33 +010035#include <types/obj_type.h>
Emeric Brun5a8c0a92010-09-23 18:44:36 +020036#include <types/peers.h>
William Lallemanda6c5f332016-11-19 02:25:36 +010037#include <types/stats.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020038
William Lallemanda6c5f332016-11-19 02:25:36 +010039#include <proto/applet.h>
40#include <proto/cli.h>
Alexandre Cassen87ea5482007-10-11 20:48:58 +020041#include <proto/backend.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020042#include <proto/fd.h>
Christopher Fauletd7c91962015-04-30 11:48:27 +020043#include <proto/filters.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020044#include <proto/listener.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020045#include <proto/log.h>
Willy Tarreaue6b98942007-10-29 01:09:36 +010046#include <proto/proto_tcp.h>
Christopher Fauletfc9cfe42019-07-16 14:54:53 +020047#include <proto/http_ana.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020048#include <proto/proxy.h>
Olivier Houchard614f8d72017-03-14 20:08:46 +010049#include <proto/server.h>
Willy Tarreaud0807c32010-08-27 18:26:11 +020050#include <proto/signal.h>
Willy Tarreaufb0afa72015-04-03 14:46:27 +020051#include <proto/stream.h>
William Lallemanda6c5f332016-11-19 02:25:36 +010052#include <proto/stream_interface.h>
Emeric Brun5a8c0a92010-09-23 18:44:36 +020053#include <proto/task.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020054
55
Willy Tarreau918ff602011-07-25 16:33:49 +020056int listeners; /* # of proxy listeners, set by cfgparse */
Olivier Houchardfbc74e82017-11-24 16:54:05 +010057struct proxy *proxies_list = NULL; /* list of all existing proxies */
Willy Tarreau53fb4ae2009-10-04 23:04:08 +020058struct eb_root used_proxy_id = EB_ROOT; /* list of proxy IDs in use */
Willy Tarreauf79d9502014-03-15 07:22:35 +010059struct eb_root proxy_by_name = EB_ROOT; /* tree of proxies sorted by name */
Willy Tarreau10479e42010-12-12 14:00:34 +010060unsigned int error_snapshot_id = 0; /* global ID assigned to each error then incremented */
Willy Tarreaubaaee002006-06-26 02:48:02 +020061
Willy Tarreau3a1f5fd2018-11-11 15:40:36 +010062/* proxy->options */
63const struct cfg_opt cfg_opts[] =
64{
65 { "abortonclose", PR_O_ABRT_CLOSE, PR_CAP_BE, 0, 0 },
66 { "allbackups", PR_O_USE_ALL_BK, PR_CAP_BE, 0, 0 },
67 { "checkcache", PR_O_CHK_CACHE, PR_CAP_BE, 0, PR_MODE_HTTP },
68 { "clitcpka", PR_O_TCP_CLI_KA, PR_CAP_FE, 0, 0 },
69 { "contstats", PR_O_CONTSTATS, PR_CAP_FE, 0, 0 },
70 { "dontlognull", PR_O_NULLNOLOG, PR_CAP_FE, 0, 0 },
71 { "http_proxy", PR_O_HTTP_PROXY, PR_CAP_FE | PR_CAP_BE, 0, PR_MODE_HTTP },
72 { "http-buffer-request", PR_O_WREQ_BODY, PR_CAP_FE | PR_CAP_BE, 0, PR_MODE_HTTP },
73 { "http-ignore-probes", PR_O_IGNORE_PRB, PR_CAP_FE, 0, PR_MODE_HTTP },
74 { "prefer-last-server", PR_O_PREF_LAST, PR_CAP_BE, 0, PR_MODE_HTTP },
75 { "logasap", PR_O_LOGASAP, PR_CAP_FE, 0, 0 },
76 { "nolinger", PR_O_TCP_NOLING, PR_CAP_FE | PR_CAP_BE, 0, 0 },
77 { "persist", PR_O_PERSIST, PR_CAP_BE, 0, 0 },
78 { "srvtcpka", PR_O_TCP_SRV_KA, PR_CAP_BE, 0, 0 },
Willy Tarreaue5733232019-05-22 19:24:06 +020079#ifdef USE_TPROXY
Willy Tarreau3a1f5fd2018-11-11 15:40:36 +010080 { "transparent", PR_O_TRANSP, PR_CAP_BE, 0, 0 },
81#else
82 { "transparent", 0, 0, 0, 0 },
83#endif
84
85 { NULL, 0, 0, 0, 0 }
86};
87
88/* proxy->options2 */
89const struct cfg_opt cfg_opts2[] =
90{
Willy Tarreaue5733232019-05-22 19:24:06 +020091#ifdef USE_LINUX_SPLICE
Willy Tarreau3a1f5fd2018-11-11 15:40:36 +010092 { "splice-request", PR_O2_SPLIC_REQ, PR_CAP_FE|PR_CAP_BE, 0, 0 },
93 { "splice-response", PR_O2_SPLIC_RTR, PR_CAP_FE|PR_CAP_BE, 0, 0 },
94 { "splice-auto", PR_O2_SPLIC_AUT, PR_CAP_FE|PR_CAP_BE, 0, 0 },
95#else
96 { "splice-request", 0, 0, 0, 0 },
97 { "splice-response", 0, 0, 0, 0 },
98 { "splice-auto", 0, 0, 0, 0 },
99#endif
100 { "accept-invalid-http-request", PR_O2_REQBUG_OK, PR_CAP_FE, 0, PR_MODE_HTTP },
101 { "accept-invalid-http-response", PR_O2_RSPBUG_OK, PR_CAP_BE, 0, PR_MODE_HTTP },
102 { "dontlog-normal", PR_O2_NOLOGNORM, PR_CAP_FE, 0, 0 },
103 { "log-separate-errors", PR_O2_LOGERRORS, PR_CAP_FE, 0, 0 },
104 { "log-health-checks", PR_O2_LOGHCHKS, PR_CAP_BE, 0, 0 },
105 { "socket-stats", PR_O2_SOCKSTAT, PR_CAP_FE, 0, 0 },
106 { "tcp-smart-accept", PR_O2_SMARTACC, PR_CAP_FE, 0, 0 },
107 { "tcp-smart-connect", PR_O2_SMARTCON, PR_CAP_BE, 0, 0 },
Willy Tarreau3a1f5fd2018-11-11 15:40:36 +0100108 { "independent-streams", PR_O2_INDEPSTR, PR_CAP_FE|PR_CAP_BE, 0, 0 },
109 { "http-use-proxy-header", PR_O2_USE_PXHDR, PR_CAP_FE, 0, PR_MODE_HTTP },
110 { "http-pretend-keepalive", PR_O2_FAKE_KA, PR_CAP_BE, 0, PR_MODE_HTTP },
111 { "http-no-delay", PR_O2_NODELAY, PR_CAP_FE|PR_CAP_BE, 0, PR_MODE_HTTP },
Christopher Faulet31930372019-07-15 10:16:58 +0200112 { "http-use-htx", 0, PR_CAP_FE|PR_CAP_BE, 0, 0 }, // deprecated
Christopher Faulet98fbe952019-07-22 16:18:24 +0200113
114 {"h1-case-adjust-bogus-client", PR_O2_H1_ADJ_BUGCLI, PR_CAP_FE, 0, PR_MODE_HTTP },
115 {"h1-case-adjust-bogus-server", PR_O2_H1_ADJ_BUGSRV, PR_CAP_BE, 0, PR_MODE_HTTP },
Willy Tarreau3a1f5fd2018-11-11 15:40:36 +0100116 { NULL, 0, 0, 0 }
117};
118
Willy Tarreau977b8e42006-12-29 14:19:17 +0100119/*
Willy Tarreau816eb542007-11-04 07:04:43 +0100120 * This function returns a string containing a name describing capabilities to
121 * report comprehensible error messages. Specifically, it will return the words
Christopher Faulet898566e2016-10-26 11:06:28 +0200122 * "frontend", "backend" when appropriate, or "proxy" for all other
Willy Tarreau816eb542007-11-04 07:04:43 +0100123 * cases including the proxies declared in "listen" mode.
Willy Tarreau977b8e42006-12-29 14:19:17 +0100124 */
Willy Tarreau816eb542007-11-04 07:04:43 +0100125const char *proxy_cap_str(int cap)
Willy Tarreau977b8e42006-12-29 14:19:17 +0100126{
Willy Tarreau816eb542007-11-04 07:04:43 +0100127 if ((cap & PR_CAP_LISTEN) != PR_CAP_LISTEN) {
128 if (cap & PR_CAP_FE)
129 return "frontend";
130 else if (cap & PR_CAP_BE)
131 return "backend";
Willy Tarreau816eb542007-11-04 07:04:43 +0100132 }
133 return "proxy";
Willy Tarreau977b8e42006-12-29 14:19:17 +0100134}
135
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +0100136/*
137 * This function returns a string containing the mode of the proxy in a format
138 * suitable for error messages.
139 */
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +0100140const char *proxy_mode_str(int mode) {
141
142 if (mode == PR_MODE_TCP)
143 return "tcp";
144 else if (mode == PR_MODE_HTTP)
145 return "http";
146 else if (mode == PR_MODE_HEALTH)
147 return "health";
William Lallemandcf62f7e2018-10-26 14:47:40 +0200148 else if (mode == PR_MODE_CLI)
149 return "cli";
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +0100150 else
151 return "unknown";
152}
153
Willy Tarreauf3950172009-10-10 18:35:51 +0200154/*
155 * This function scans the list of backends and servers to retrieve the first
156 * backend and the first server with the given names, and sets them in both
157 * parameters. It returns zero if either is not found, or non-zero and sets
158 * the ones it did not found to NULL. If a NULL pointer is passed for the
159 * backend, only the pointer to the server will be updated.
160 */
161int get_backend_server(const char *bk_name, const char *sv_name,
162 struct proxy **bk, struct server **sv)
163{
164 struct proxy *p;
165 struct server *s;
Willy Tarreau7ecc4202014-03-15 07:57:11 +0100166 int sid;
Willy Tarreauf3950172009-10-10 18:35:51 +0200167
168 *sv = NULL;
169
Willy Tarreau050536d2012-10-04 08:47:34 +0200170 sid = -1;
Willy Tarreaucfeaa472009-10-10 22:33:08 +0200171 if (*sv_name == '#')
172 sid = atoi(sv_name + 1);
173
Willy Tarreau9e0bb102015-05-26 11:24:42 +0200174 p = proxy_be_by_name(bk_name);
Willy Tarreauf3950172009-10-10 18:35:51 +0200175 if (bk)
176 *bk = p;
177 if (!p)
178 return 0;
179
180 for (s = p->srv; s; s = s->next)
Willy Tarreau4055a102012-11-15 00:15:18 +0100181 if ((sid >= 0 && s->puid == sid) ||
182 (sid < 0 && strcmp(s->id, sv_name) == 0))
Willy Tarreauf3950172009-10-10 18:35:51 +0200183 break;
184 *sv = s;
185 if (!s)
186 return 0;
187 return 1;
188}
189
Willy Tarreaue219db72007-12-03 01:30:13 +0100190/* This function parses a "timeout" statement in a proxy section. It returns
191 * -1 if there is any error, 1 for a warning, otherwise zero. If it does not
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200192 * return zero, it will write an error or warning message into a preallocated
193 * buffer returned at <err>. The trailing is not be written. The function must
194 * be called with <args> pointing to the first command line word, with <proxy>
195 * pointing to the proxy being parsed, and <defpx> to the default proxy or NULL.
196 * As a special case for compatibility with older configs, it also accepts
197 * "{cli|srv|con}timeout" in args[0].
Willy Tarreaue219db72007-12-03 01:30:13 +0100198 */
Willy Tarreau9de1bbd2008-07-09 20:34:27 +0200199static int proxy_parse_timeout(char **args, int section, struct proxy *proxy,
Willy Tarreau28a47d62012-09-18 20:02:48 +0200200 struct proxy *defpx, const char *file, int line,
201 char **err)
Willy Tarreaue219db72007-12-03 01:30:13 +0100202{
203 unsigned timeout;
204 int retval, cap;
205 const char *res, *name;
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200206 int *tv = NULL;
207 int *td = NULL;
Willy Tarreaue219db72007-12-03 01:30:13 +0100208
209 retval = 0;
Willy Tarreau9de1bbd2008-07-09 20:34:27 +0200210
211 /* simply skip "timeout" but remain compatible with old form */
212 if (strcmp(args[0], "timeout") == 0)
213 args++;
214
Willy Tarreaue219db72007-12-03 01:30:13 +0100215 name = args[0];
Tim Duesterhus86e6b6e2019-05-14 20:57:59 +0200216 if (!strcmp(args[0], "client")) {
Willy Tarreaue219db72007-12-03 01:30:13 +0100217 name = "client";
Willy Tarreaud7c30f92007-12-03 01:38:36 +0100218 tv = &proxy->timeout.client;
219 td = &defpx->timeout.client;
Willy Tarreaue219db72007-12-03 01:30:13 +0100220 cap = PR_CAP_FE;
221 } else if (!strcmp(args[0], "tarpit")) {
222 tv = &proxy->timeout.tarpit;
223 td = &defpx->timeout.tarpit;
Willy Tarreau51c9bde2008-01-06 13:40:03 +0100224 cap = PR_CAP_FE | PR_CAP_BE;
Willy Tarreaub16a5742010-01-10 14:46:16 +0100225 } else if (!strcmp(args[0], "http-keep-alive")) {
226 tv = &proxy->timeout.httpka;
227 td = &defpx->timeout.httpka;
228 cap = PR_CAP_FE | PR_CAP_BE;
Willy Tarreau036fae02008-01-06 13:24:40 +0100229 } else if (!strcmp(args[0], "http-request")) {
230 tv = &proxy->timeout.httpreq;
231 td = &defpx->timeout.httpreq;
Willy Tarreaucd7afc02009-07-12 10:03:17 +0200232 cap = PR_CAP_FE | PR_CAP_BE;
Tim Duesterhus86e6b6e2019-05-14 20:57:59 +0200233 } else if (!strcmp(args[0], "server")) {
Willy Tarreaue219db72007-12-03 01:30:13 +0100234 name = "server";
Willy Tarreaud7c30f92007-12-03 01:38:36 +0100235 tv = &proxy->timeout.server;
236 td = &defpx->timeout.server;
Willy Tarreaue219db72007-12-03 01:30:13 +0100237 cap = PR_CAP_BE;
Tim Duesterhus86e6b6e2019-05-14 20:57:59 +0200238 } else if (!strcmp(args[0], "connect")) {
Willy Tarreaue219db72007-12-03 01:30:13 +0100239 name = "connect";
Willy Tarreaud7c30f92007-12-03 01:38:36 +0100240 tv = &proxy->timeout.connect;
241 td = &defpx->timeout.connect;
Willy Tarreaue219db72007-12-03 01:30:13 +0100242 cap = PR_CAP_BE;
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +0100243 } else if (!strcmp(args[0], "check")) {
244 tv = &proxy->timeout.check;
245 td = &defpx->timeout.check;
246 cap = PR_CAP_BE;
Willy Tarreaue219db72007-12-03 01:30:13 +0100247 } else if (!strcmp(args[0], "queue")) {
248 tv = &proxy->timeout.queue;
249 td = &defpx->timeout.queue;
250 cap = PR_CAP_BE;
Willy Tarreauce887fd2012-05-12 12:50:00 +0200251 } else if (!strcmp(args[0], "tunnel")) {
252 tv = &proxy->timeout.tunnel;
253 td = &defpx->timeout.tunnel;
254 cap = PR_CAP_BE;
Willy Tarreau05cdd962014-05-10 14:30:07 +0200255 } else if (!strcmp(args[0], "client-fin")) {
256 tv = &proxy->timeout.clientfin;
257 td = &defpx->timeout.clientfin;
258 cap = PR_CAP_FE;
259 } else if (!strcmp(args[0], "server-fin")) {
260 tv = &proxy->timeout.serverfin;
261 td = &defpx->timeout.serverfin;
262 cap = PR_CAP_BE;
Tim Duesterhus86e6b6e2019-05-14 20:57:59 +0200263 } else if (!strcmp(args[0], "clitimeout")) {
264 memprintf(err, "the '%s' directive is not supported anymore since HAProxy 2.1. Use 'timeout client'.", args[0]);
265 return -1;
266 } else if (!strcmp(args[0], "srvtimeout")) {
267 memprintf(err, "the '%s' directive is not supported anymore since HAProxy 2.1. Use 'timeout server'.", args[0]);
268 return -1;
269 } else if (!strcmp(args[0], "contimeout")) {
270 memprintf(err, "the '%s' directive is not supported anymore since HAProxy 2.1. Use 'timeout connect'.", args[0]);
271 return -1;
Willy Tarreaue219db72007-12-03 01:30:13 +0100272 } else {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200273 memprintf(err,
274 "'timeout' supports 'client', 'server', 'connect', 'check', "
Willy Tarreau05cdd962014-05-10 14:30:07 +0200275 "'queue', 'http-keep-alive', 'http-request', 'tunnel', 'tarpit', "
276 "'client-fin' and 'server-fin' (got '%s')",
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200277 args[0]);
Willy Tarreaue219db72007-12-03 01:30:13 +0100278 return -1;
279 }
280
281 if (*args[1] == 0) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200282 memprintf(err, "'timeout %s' expects an integer value (in milliseconds)", name);
Willy Tarreaue219db72007-12-03 01:30:13 +0100283 return -1;
284 }
285
286 res = parse_time_err(args[1], &timeout, TIME_UNIT_MS);
Willy Tarreau9faebe32019-06-07 19:00:37 +0200287 if (res == PARSE_TIME_OVER) {
288 memprintf(err, "timer overflow in argument '%s' to 'timeout %s' (maximum value is 2147483647 ms or ~24.8 days)",
289 args[1], name);
290 return -1;
291 }
292 else if (res == PARSE_TIME_UNDER) {
293 memprintf(err, "timer underflow in argument '%s' to 'timeout %s' (minimum non-null value is 1 ms)",
294 args[1], name);
295 return -1;
296 }
297 else if (res) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200298 memprintf(err, "unexpected character '%c' in 'timeout %s'", *res, name);
Willy Tarreaue219db72007-12-03 01:30:13 +0100299 return -1;
300 }
301
302 if (!(proxy->cap & cap)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200303 memprintf(err, "'timeout %s' will be ignored because %s '%s' has no %s capability",
304 name, proxy_type_str(proxy), proxy->id,
305 (cap & PR_CAP_BE) ? "backend" : "frontend");
Willy Tarreaue219db72007-12-03 01:30:13 +0100306 retval = 1;
307 }
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200308 else if (defpx && *tv != *td) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200309 memprintf(err, "overwriting 'timeout %s' which was already specified", name);
Willy Tarreaue219db72007-12-03 01:30:13 +0100310 retval = 1;
311 }
312
Willy Tarreaufac5b592014-05-22 08:24:46 +0200313 if (*args[2] != 0) {
314 memprintf(err, "'timeout %s' : unexpected extra argument '%s' after value '%s'.", name, args[2], args[1]);
315 retval = -1;
316 }
317
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200318 *tv = MS_TO_TICKS(timeout);
Willy Tarreaue219db72007-12-03 01:30:13 +0100319 return retval;
320}
321
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100322/* This function parses a "rate-limit" statement in a proxy section. It returns
323 * -1 if there is any error, 1 for a warning, otherwise zero. If it does not
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200324 * return zero, it will write an error or warning message into a preallocated
325 * buffer returned at <err>. The function must be called with <args> pointing
326 * to the first command line word, with <proxy> pointing to the proxy being
327 * parsed, and <defpx> to the default proxy or NULL.
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100328 */
329static int proxy_parse_rate_limit(char **args, int section, struct proxy *proxy,
Willy Tarreau28a47d62012-09-18 20:02:48 +0200330 struct proxy *defpx, const char *file, int line,
331 char **err)
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100332{
William Dauchybb9da0b2020-01-16 01:34:27 +0100333 int retval;
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200334 char *res;
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100335 unsigned int *tv = NULL;
336 unsigned int *td = NULL;
337 unsigned int val;
338
339 retval = 0;
340
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200341 if (strcmp(args[1], "sessions") == 0) {
Willy Tarreau13a34bd2009-05-10 18:52:49 +0200342 tv = &proxy->fe_sps_lim;
343 td = &defpx->fe_sps_lim;
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200344 }
345 else {
346 memprintf(err, "'%s' only supports 'sessions' (got '%s')", args[0], args[1]);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100347 return -1;
348 }
349
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200350 if (*args[2] == 0) {
351 memprintf(err, "'%s %s' expects expects an integer value (in sessions/second)", args[0], args[1]);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100352 return -1;
353 }
354
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200355 val = strtoul(args[2], &res, 0);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100356 if (*res) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200357 memprintf(err, "'%s %s' : unexpected character '%c' in integer value '%s'", args[0], args[1], *res, args[2]);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100358 return -1;
359 }
360
William Dauchybb9da0b2020-01-16 01:34:27 +0100361 if (!(proxy->cap & PR_CAP_FE)) {
362 memprintf(err, "%s %s will be ignored because %s '%s' has no frontend capability",
363 args[0], args[1], proxy_type_str(proxy), proxy->id);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100364 retval = 1;
365 }
366 else if (defpx && *tv != *td) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200367 memprintf(err, "overwriting %s %s which was already specified", args[0], args[1]);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100368 retval = 1;
369 }
370
371 *tv = val;
372 return retval;
373}
374
Willy Tarreauc35362a2014-04-25 13:58:37 +0200375/* This function parses a "max-keep-alive-queue" statement in a proxy section.
376 * It returns -1 if there is any error, 1 for a warning, otherwise zero. If it
377 * does not return zero, it will write an error or warning message into a
378 * preallocated buffer returned at <err>. The function must be called with
379 * <args> pointing to the first command line word, with <proxy> pointing to
380 * the proxy being parsed, and <defpx> to the default proxy or NULL.
381 */
382static int proxy_parse_max_ka_queue(char **args, int section, struct proxy *proxy,
383 struct proxy *defpx, const char *file, int line,
384 char **err)
385{
386 int retval;
387 char *res;
388 unsigned int val;
389
390 retval = 0;
391
392 if (*args[1] == 0) {
393 memprintf(err, "'%s' expects expects an integer value (or -1 to disable)", args[0]);
394 return -1;
395 }
396
397 val = strtol(args[1], &res, 0);
398 if (*res) {
399 memprintf(err, "'%s' : unexpected character '%c' in integer value '%s'", args[0], *res, args[1]);
400 return -1;
401 }
402
403 if (!(proxy->cap & PR_CAP_BE)) {
404 memprintf(err, "%s will be ignored because %s '%s' has no backend capability",
405 args[0], proxy_type_str(proxy), proxy->id);
406 retval = 1;
407 }
408
409 /* we store <val+1> so that a user-facing value of -1 is stored as zero (default) */
410 proxy->max_ka_queue = val + 1;
411 return retval;
412}
413
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +0200414/* This function parses a "declare" statement in a proxy section. It returns -1
415 * if there is any error, 1 for warning, otherwise 0. If it does not return zero,
416 * it will write an error or warning message into a preallocated buffer returned
417 * at <err>. The function must be called with <args> pointing to the first command
418 * line word, with <proxy> pointing to the proxy being parsed, and <defpx> to the
419 * default proxy or NULL.
420 */
421static int proxy_parse_declare(char **args, int section, struct proxy *curpx,
422 struct proxy *defpx, const char *file, int line,
423 char **err)
424{
425 /* Capture keyword wannot be declared in a default proxy. */
426 if (curpx == defpx) {
Joseph Herlant9edebb82018-11-15 11:50:44 -0800427 memprintf(err, "'%s' not available in default section", args[0]);
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +0200428 return -1;
429 }
430
Joseph Herlant59dd2952018-11-15 11:46:55 -0800431 /* Capture keywork is only available in frontend. */
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +0200432 if (!(curpx->cap & PR_CAP_FE)) {
Joseph Herlant9edebb82018-11-15 11:50:44 -0800433 memprintf(err, "'%s' only available in frontend or listen section", args[0]);
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +0200434 return -1;
435 }
436
437 /* Check mandatory second keyword. */
438 if (!args[1] || !*args[1]) {
439 memprintf(err, "'%s' needs a second keyword that specify the type of declaration ('capture')", args[0]);
440 return -1;
441 }
442
Joseph Herlant59dd2952018-11-15 11:46:55 -0800443 /* Actually, declare is only available for declaring capture
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +0200444 * slot, but in the future it can declare maps or variables.
Joseph Herlant59dd2952018-11-15 11:46:55 -0800445 * So, this section permits to check and switch according with
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +0200446 * the second keyword.
447 */
448 if (strcmp(args[1], "capture") == 0) {
449 char *error = NULL;
450 long len;
451 struct cap_hdr *hdr;
452
453 /* Check the next keyword. */
454 if (!args[2] || !*args[2] ||
455 (strcmp(args[2], "response") != 0 &&
456 strcmp(args[2], "request") != 0)) {
457 memprintf(err, "'%s %s' requires a direction ('request' or 'response')", args[0], args[1]);
458 return -1;
459 }
460
461 /* Check the 'len' keyword. */
462 if (!args[3] || !*args[3] || strcmp(args[3], "len") != 0) {
463 memprintf(err, "'%s %s' requires a capture length ('len')", args[0], args[1]);
464 return -1;
465 }
466
467 /* Check the length value. */
468 if (!args[4] || !*args[4]) {
469 memprintf(err, "'%s %s': 'len' requires a numeric value that represents the "
470 "capture length",
471 args[0], args[1]);
472 return -1;
473 }
474
475 /* convert the length value. */
476 len = strtol(args[4], &error, 10);
477 if (*error != '\0') {
478 memprintf(err, "'%s %s': cannot parse the length '%s'.",
479 args[0], args[1], args[3]);
480 return -1;
481 }
482
483 /* check length. */
484 if (len <= 0) {
485 memprintf(err, "length must be > 0");
486 return -1;
487 }
488
489 /* register the capture. */
Vincent Bernat02779b62016-04-03 13:48:43 +0200490 hdr = calloc(1, sizeof(*hdr));
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +0200491 hdr->name = NULL; /* not a header capture */
492 hdr->namelen = 0;
493 hdr->len = len;
494 hdr->pool = create_pool("caphdr", hdr->len + 1, MEM_F_SHARED);
495
496 if (strcmp(args[2], "request") == 0) {
497 hdr->next = curpx->req_cap;
498 hdr->index = curpx->nb_req_cap++;
499 curpx->req_cap = hdr;
500 }
501 if (strcmp(args[2], "response") == 0) {
502 hdr->next = curpx->rsp_cap;
503 hdr->index = curpx->nb_rsp_cap++;
504 curpx->rsp_cap = hdr;
505 }
506 return 0;
507 }
508 else {
509 memprintf(err, "unknown declaration type '%s' (supports 'capture')", args[1]);
510 return -1;
511 }
512}
513
Olivier Houcharda254a372019-04-05 15:30:12 +0200514/* This function parses a "retry-on" statement */
515static int
516proxy_parse_retry_on(char **args, int section, struct proxy *curpx,
517 struct proxy *defpx, const char *file, int line,
518 char **err)
519{
520 int i;
521
522 if (!(*args[1])) {
523 memprintf(err, "'%s' needs at least one keyword to specify when to retry", args[0]);
524 return -1;
525 }
526 if (!(curpx->cap & PR_CAP_BE)) {
527 memprintf(err, "'%s' only available in backend or listen section", args[0]);
528 return -1;
529 }
530 curpx->retry_type = 0;
531 for (i = 1; *(args[i]); i++) {
532 if (!strcmp(args[i], "conn-failure"))
533 curpx->retry_type |= PR_RE_CONN_FAILED;
534 else if (!strcmp(args[i], "empty-response"))
535 curpx->retry_type |= PR_RE_DISCONNECTED;
536 else if (!strcmp(args[i], "response-timeout"))
537 curpx->retry_type |= PR_RE_TIMEOUT;
538 else if (!strcmp(args[i], "404"))
539 curpx->retry_type |= PR_RE_404;
540 else if (!strcmp(args[i], "408"))
541 curpx->retry_type |= PR_RE_408;
542 else if (!strcmp(args[i], "425"))
543 curpx->retry_type |= PR_RE_425;
544 else if (!strcmp(args[i], "500"))
545 curpx->retry_type |= PR_RE_500;
546 else if (!strcmp(args[i], "501"))
547 curpx->retry_type |= PR_RE_501;
548 else if (!strcmp(args[i], "502"))
549 curpx->retry_type |= PR_RE_502;
550 else if (!strcmp(args[i], "503"))
551 curpx->retry_type |= PR_RE_503;
552 else if (!strcmp(args[i], "504"))
553 curpx->retry_type |= PR_RE_504;
Olivier Houchard865d8392019-05-03 22:46:27 +0200554 else if (!strcmp(args[i], "0rtt-rejected"))
555 curpx->retry_type |= PR_RE_EARLY_ERROR;
Olivier Houcharde3249a92019-05-03 23:01:47 +0200556 else if (!strcmp(args[i], "junk-response"))
557 curpx->retry_type |= PR_RE_JUNK_REQUEST;
Olivier Houchardddf0e032019-05-10 18:05:40 +0200558 else if (!(strcmp(args[i], "all-retryable-errors")))
559 curpx->retry_type |= PR_RE_CONN_FAILED | PR_RE_DISCONNECTED |
560 PR_RE_TIMEOUT | PR_RE_500 | PR_RE_502 |
561 PR_RE_503 | PR_RE_504 | PR_RE_EARLY_ERROR |
562 PR_RE_JUNK_REQUEST;
Olivier Houcharda254a372019-04-05 15:30:12 +0200563 else if (!strcmp(args[i], "none")) {
564 if (i != 1 || *args[i + 1]) {
565 memprintf(err, "'%s' 'none' keyworld only usable alone", args[0]);
566 return -1;
567 }
568 } else {
569 memprintf(err, "'%s': unknown keyword '%s'", args[0], args[i]);
570 return -1;
571 }
572
573 }
574
575
576 return 0;
577}
578
Willy Tarreauf79d9502014-03-15 07:22:35 +0100579/* This function inserts proxy <px> into the tree of known proxies. The proxy's
580 * name is used as the storing key so it must already have been initialized.
581 */
582void proxy_store_name(struct proxy *px)
583{
584 px->conf.by_name.key = px->id;
585 ebis_insert(&proxy_by_name, &px->conf.by_name);
586}
587
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200588/* Returns a pointer to the first proxy matching capabilities <cap> and id
589 * <id>. NULL is returned if no match is found. If <table> is non-zero, it
590 * only considers proxies having a table.
Willy Tarreaubc216c42011-08-02 11:25:54 +0200591 */
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200592struct proxy *proxy_find_by_id(int id, int cap, int table)
Willy Tarreau9e0bb102015-05-26 11:24:42 +0200593{
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200594 struct eb32_node *n;
Willy Tarreaubc216c42011-08-02 11:25:54 +0200595
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200596 for (n = eb32_lookup(&used_proxy_id, id); n; n = eb32_next(n)) {
597 struct proxy *px = container_of(n, struct proxy, conf.id);
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100598
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200599 if (px->uuid != id)
600 break;
Alex Williams96532db2009-11-01 21:27:13 -0500601
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200602 if ((px->cap & cap) != cap)
603 continue;
Alex Williams96532db2009-11-01 21:27:13 -0500604
Frédéric Lécaille1b8e68e2019-03-14 07:07:41 +0100605 if (table && (!px->table || !px->table->size))
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200606 continue;
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100607
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200608 return px;
609 }
610 return NULL;
611}
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100612
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200613/* Returns a pointer to the first proxy matching either name <name>, or id
614 * <name> if <name> begins with a '#'. NULL is returned if no match is found.
615 * If <table> is non-zero, it only considers proxies having a table.
616 */
617struct proxy *proxy_find_by_name(const char *name, int cap, int table)
618{
619 struct proxy *curproxy;
Willy Tarreau9e0bb102015-05-26 11:24:42 +0200620
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200621 if (*name == '#') {
622 curproxy = proxy_find_by_id(atoi(name + 1), cap, table);
623 if (curproxy)
Willy Tarreauc739aa82015-05-26 11:35:41 +0200624 return curproxy;
Alex Williams96532db2009-11-01 21:27:13 -0500625 }
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100626 else {
627 struct ebpt_node *node;
628
629 for (node = ebis_lookup(&proxy_by_name, name); node; node = ebpt_next(node)) {
630 curproxy = container_of(node, struct proxy, conf.by_name);
Alex Williams96532db2009-11-01 21:27:13 -0500631
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100632 if (strcmp(curproxy->id, name) != 0)
633 break;
634
635 if ((curproxy->cap & cap) != cap)
636 continue;
637
Frédéric Lécaille1b8e68e2019-03-14 07:07:41 +0100638 if (table && (!curproxy->table || !curproxy->table->size))
Willy Tarreau9e0bb102015-05-26 11:24:42 +0200639 continue;
640
Willy Tarreauc739aa82015-05-26 11:35:41 +0200641 return curproxy;
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100642 }
643 }
Willy Tarreauc739aa82015-05-26 11:35:41 +0200644 return NULL;
Alex Williams96532db2009-11-01 21:27:13 -0500645}
646
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200647/* Finds the best match for a proxy with capabilities <cap>, name <name> and id
648 * <id>. At most one of <id> or <name> may be different provided that <cap> is
649 * valid. Either <id> or <name> may be left unspecified (0). The purpose is to
650 * find a proxy based on some information from a previous configuration, across
651 * reloads or during information exchange between peers.
652 *
653 * Names are looked up first if present, then IDs are compared if present. In
654 * case of an inexact match whatever is forced in the configuration has
655 * precedence in the following order :
656 * - 1) forced ID (proves a renaming / change of proxy type)
657 * - 2) proxy name+type (may indicate a move if ID differs)
658 * - 3) automatic ID+type (may indicate a renaming)
659 *
660 * Depending on what is found, we can end up in the following situations :
661 *
662 * name id cap | possible causes
663 * -------------+-----------------
664 * -- -- -- | nothing found
665 * -- -- ok | nothing found
666 * -- ok -- | proxy deleted, ID points to next one
667 * -- ok ok | proxy renamed, or deleted with ID pointing to next one
668 * ok -- -- | proxy deleted, but other half with same name still here (before)
669 * ok -- ok | proxy's ID changed (proxy moved in the config file)
670 * ok ok -- | proxy deleted, but other half with same name still here (after)
671 * ok ok ok | perfect match
672 *
673 * Upon return if <diff> is not NULL, it is zeroed then filled with up to 3 bits :
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200674 * - PR_FBM_MISMATCH_ID : proxy was found but ID differs
675 * (and ID was not zero)
676 * - PR_FBM_MISMATCH_NAME : proxy was found by ID but name differs
677 * (and name was not NULL)
678 * - PR_FBM_MISMATCH_PROXYTYPE : a proxy of different type was found with
679 * the same name and/or id
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200680 *
681 * Only a valid proxy is returned. If capabilities do not match, NULL is
682 * returned. The caller can check <diff> to report detailed warnings / errors,
683 * and decide whether or not to use what was found.
684 */
685struct proxy *proxy_find_best_match(int cap, const char *name, int id, int *diff)
686{
687 struct proxy *byname;
688 struct proxy *byid;
689
690 if (!name && !id)
691 return NULL;
692
693 if (diff)
694 *diff = 0;
695
696 byname = byid = NULL;
697
698 if (name) {
699 byname = proxy_find_by_name(name, cap, 0);
700 if (byname && (!id || byname->uuid == id))
701 return byname;
702 }
703
Joseph Herlant59dd2952018-11-15 11:46:55 -0800704 /* remaining possibilities :
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200705 * - name not set
706 * - name set but not found
707 * - name found, but ID doesn't match.
708 */
709 if (id) {
710 byid = proxy_find_by_id(id, cap, 0);
711 if (byid) {
712 if (byname) {
713 /* id+type found, name+type found, but not all 3.
714 * ID wins only if forced, otherwise name wins.
715 */
716 if (byid->options & PR_O_FORCED_ID) {
717 if (diff)
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200718 *diff |= PR_FBM_MISMATCH_NAME;
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200719 return byid;
720 }
721 else {
722 if (diff)
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200723 *diff |= PR_FBM_MISMATCH_ID;
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200724 return byname;
725 }
726 }
727
Joseph Herlant59dd2952018-11-15 11:46:55 -0800728 /* remaining possibilities :
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200729 * - name not set
730 * - name set but not found
731 */
732 if (name && diff)
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200733 *diff |= PR_FBM_MISMATCH_NAME;
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200734 return byid;
735 }
736
737 /* ID not found */
738 if (byname) {
739 if (diff)
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200740 *diff |= PR_FBM_MISMATCH_ID;
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200741 return byname;
742 }
743 }
744
Joseph Herlant59dd2952018-11-15 11:46:55 -0800745 /* All remaining possibilities will lead to NULL. If we can report more
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200746 * detailed information to the caller about changed types and/or name,
747 * we'll do it. For example, we could detect that "listen foo" was
748 * split into "frontend foo_ft" and "backend foo_bk" if IDs are forced.
749 * - name not set, ID not found
750 * - name not found, ID not set
751 * - name not found, ID not found
752 */
753 if (!diff)
754 return NULL;
755
756 if (name) {
757 byname = proxy_find_by_name(name, 0, 0);
758 if (byname && (!id || byname->uuid == id))
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200759 *diff |= PR_FBM_MISMATCH_PROXYTYPE;
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200760 }
761
762 if (id) {
763 byid = proxy_find_by_id(id, 0, 0);
764 if (byid) {
765 if (!name)
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200766 *diff |= PR_FBM_MISMATCH_PROXYTYPE; /* only type changed */
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200767 else if (byid->options & PR_O_FORCED_ID)
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200768 *diff |= PR_FBM_MISMATCH_NAME | PR_FBM_MISMATCH_PROXYTYPE; /* name and type changed */
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200769 /* otherwise it's a different proxy that was returned */
770 }
771 }
772 return NULL;
773}
774
Willy Tarreaubaaee002006-06-26 02:48:02 +0200775/*
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100776 * This function finds a server with matching name within selected proxy.
777 * It also checks if there are more matching servers with
778 * requested name as this often leads into unexpected situations.
779 */
780
781struct server *findserver(const struct proxy *px, const char *name) {
782
783 struct server *cursrv, *target = NULL;
784
785 if (!px)
786 return NULL;
787
788 for (cursrv = px->srv; cursrv; cursrv = cursrv->next) {
789 if (strcmp(cursrv->id, name))
790 continue;
791
792 if (!target) {
793 target = cursrv;
794 continue;
795 }
796
Christopher Faulet767a84b2017-11-24 16:50:31 +0100797 ha_alert("Refusing to use duplicated server '%s' found in proxy: %s!\n",
798 name, px->id);
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100799
800 return NULL;
801 }
802
803 return target;
804}
805
Willy Tarreauff01a212009-03-15 13:46:16 +0100806/* This function checks that the designated proxy has no http directives
807 * enabled. It will output a warning if there are, and will fix some of them.
808 * It returns the number of fatal errors encountered. This should be called
809 * at the end of the configuration parsing if the proxy is not in http mode.
810 * The <file> argument is used to construct the error message.
811 */
Willy Tarreau915e1eb2009-06-22 15:48:36 +0200812int proxy_cfg_ensure_no_http(struct proxy *curproxy)
Willy Tarreauff01a212009-03-15 13:46:16 +0100813{
814 if (curproxy->cookie_name != NULL) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100815 ha_warning("config : cookie will be ignored for %s '%s' (needs 'mode http').\n",
816 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100817 }
Willy Tarreauff01a212009-03-15 13:46:16 +0100818 if (curproxy->monitor_uri != NULL) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100819 ha_warning("config : monitor-uri will be ignored for %s '%s' (needs 'mode http').\n",
820 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100821 }
Willy Tarreauf3e49f92009-10-03 12:21:20 +0200822 if (curproxy->lbprm.algo & BE_LB_NEED_HTTP) {
Willy Tarreauff01a212009-03-15 13:46:16 +0100823 curproxy->lbprm.algo &= ~BE_LB_ALGO;
824 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Christopher Faulet767a84b2017-11-24 16:50:31 +0100825 ha_warning("config : Layer 7 hash not possible for %s '%s' (needs 'mode http'). Falling back to round robin.\n",
826 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100827 }
Willy Tarreau17804162009-11-09 21:27:51 +0100828 if (curproxy->to_log & (LW_REQ | LW_RESP)) {
829 curproxy->to_log &= ~(LW_REQ | LW_RESP);
Christopher Faulet767a84b2017-11-24 16:50:31 +0100830 ha_warning("parsing [%s:%d] : HTTP log/header format not usable with %s '%s' (needs 'mode http').\n",
831 curproxy->conf.lfs_file, curproxy->conf.lfs_line,
832 proxy_type_str(curproxy), curproxy->id);
Willy Tarreau17804162009-11-09 21:27:51 +0100833 }
Willy Tarreau62a61232013-04-12 18:13:46 +0200834 if (curproxy->conf.logformat_string == default_http_log_format ||
835 curproxy->conf.logformat_string == clf_http_log_format) {
836 /* Note: we don't change the directive's file:line number */
837 curproxy->conf.logformat_string = default_tcp_log_format;
Christopher Faulet767a84b2017-11-24 16:50:31 +0100838 ha_warning("parsing [%s:%d] : 'option httplog' not usable with %s '%s' (needs 'mode http'). Falling back to 'option tcplog'.\n",
839 curproxy->conf.lfs_file, curproxy->conf.lfs_line,
840 proxy_type_str(curproxy), curproxy->id);
Willy Tarreau196729e2012-05-31 19:30:26 +0200841 }
842
Willy Tarreauff01a212009-03-15 13:46:16 +0100843 return 0;
844}
845
Willy Tarreau237250c2011-07-29 01:49:03 +0200846/* Perform the most basic initialization of a proxy :
847 * memset(), list_init(*), reset_timeouts(*).
Willy Tarreaub249e842011-09-07 18:41:08 +0200848 * Any new proxy or peer should be initialized via this function.
Willy Tarreau237250c2011-07-29 01:49:03 +0200849 */
850void init_new_proxy(struct proxy *p)
851{
852 memset(p, 0, sizeof(struct proxy));
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100853 p->obj_type = OBJ_TYPE_PROXY;
Patrick Hemmer0355dab2018-05-11 12:52:31 -0400854 p->pendconns = EB_ROOT;
Willy Tarreau237250c2011-07-29 01:49:03 +0200855 LIST_INIT(&p->acl);
856 LIST_INIT(&p->http_req_rules);
Willy Tarreaue365c0b2013-06-11 16:06:12 +0200857 LIST_INIT(&p->http_res_rules);
Willy Tarreau237250c2011-07-29 01:49:03 +0200858 LIST_INIT(&p->redirect_rules);
859 LIST_INIT(&p->mon_fail_cond);
860 LIST_INIT(&p->switching_rules);
Willy Tarreau4a5cade2012-04-05 21:09:48 +0200861 LIST_INIT(&p->server_rules);
Willy Tarreau237250c2011-07-29 01:49:03 +0200862 LIST_INIT(&p->persist_rules);
863 LIST_INIT(&p->sticking_rules);
864 LIST_INIT(&p->storersp_rules);
865 LIST_INIT(&p->tcp_req.inspect_rules);
866 LIST_INIT(&p->tcp_rep.inspect_rules);
867 LIST_INIT(&p->tcp_req.l4_rules);
Willy Tarreau620408f2016-10-21 16:37:51 +0200868 LIST_INIT(&p->tcp_req.l5_rules);
Olivier Houchard859dc802019-08-08 15:47:21 +0200869 MT_LIST_INIT(&p->listener_queue);
William Lallemand0f99e342011-10-12 17:50:54 +0200870 LIST_INIT(&p->logsrvs);
William Lallemand723b73a2012-02-08 16:37:49 +0100871 LIST_INIT(&p->logformat);
Dragan Dosen0b85ece2015-09-25 19:17:44 +0200872 LIST_INIT(&p->logformat_sd);
William Lallemanda73203e2012-03-12 12:48:57 +0100873 LIST_INIT(&p->format_unique_id);
Willy Tarreau2a65ff02012-09-13 17:54:29 +0200874 LIST_INIT(&p->conf.bind);
Willy Tarreau4348fad2012-09-20 16:48:07 +0200875 LIST_INIT(&p->conf.listeners);
Christopher Faulet76edc0f2020-01-13 15:52:01 +0100876 LIST_INIT(&p->conf.errors);
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200877 LIST_INIT(&p->conf.args.list);
Baptiste Assmann5ecb77f2013-10-06 23:24:13 +0200878 LIST_INIT(&p->tcpcheck_rules);
Christopher Faulet443ea1a2016-02-04 13:40:26 +0100879 LIST_INIT(&p->filter_configs);
Willy Tarreau237250c2011-07-29 01:49:03 +0200880
881 /* Timeouts are defined as -1 */
882 proxy_reset_timeouts(p);
883 p->tcp_rep.inspect_delay = TICK_ETERNITY;
Willy Tarreau050536d2012-10-04 08:47:34 +0200884
885 /* initial uuid is unassigned (-1) */
886 p->uuid = -1;
Christopher Fauletff8abcd2017-06-02 15:33:24 +0200887
Olivier Houcharda254a372019-04-05 15:30:12 +0200888 /* Default to only allow L4 retries */
889 p->retry_type = PR_RE_CONN_FAILED;
890
Christopher Faulet2a944ee2017-11-07 10:42:54 +0100891 HA_SPIN_INIT(&p->lock);
Willy Tarreau237250c2011-07-29 01:49:03 +0200892}
893
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100894/*
Willy Tarreau2ff76222007-04-09 19:29:56 +0200895 * This function creates all proxy sockets. It should be done very early,
896 * typically before privileges are dropped. The sockets will be registered
897 * but not added to any fd_set, in order not to loose them across the fork().
Willy Tarreau562515c2011-07-25 08:11:52 +0200898 * The proxies also start in READY state because they all have their listeners
Willy Tarreauf3f8c702011-07-25 07:37:28 +0200899 * bound.
Willy Tarreau2ff76222007-04-09 19:29:56 +0200900 *
901 * Its return value is composed from ERR_NONE, ERR_RETRYABLE and ERR_FATAL.
902 * Retryable errors will only be printed if <verbose> is not zero.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200903 */
904int start_proxies(int verbose)
905{
906 struct proxy *curproxy;
907 struct listener *listener;
Willy Tarreaue6b98942007-10-29 01:09:36 +0100908 int lerr, err = ERR_NONE;
909 int pxerr;
910 char msg[100];
Willy Tarreaubaaee002006-06-26 02:48:02 +0200911
Olivier Houchardfbc74e82017-11-24 16:54:05 +0100912 for (curproxy = proxies_list; curproxy != NULL; curproxy = curproxy->next) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200913 if (curproxy->state != PR_STNEW)
914 continue; /* already initialized */
915
916 pxerr = 0;
Willy Tarreau4348fad2012-09-20 16:48:07 +0200917 list_for_each_entry(listener, &curproxy->conf.listeners, by_fe) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100918 if (listener->state != LI_ASSIGNED)
919 continue; /* already started */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200920
Emeric Bruncf20bf12010-10-22 16:06:11 +0200921 lerr = listener->proto->bind(listener, msg, sizeof(msg));
Willy Tarreaubaaee002006-06-26 02:48:02 +0200922
Willy Tarreaue6b98942007-10-29 01:09:36 +0100923 /* errors are reported if <verbose> is set or if they are fatal */
924 if (verbose || (lerr & (ERR_FATAL | ERR_ABORT))) {
925 if (lerr & ERR_ALERT)
Christopher Faulet767a84b2017-11-24 16:50:31 +0100926 ha_alert("Starting %s %s: %s\n",
927 proxy_type_str(curproxy), curproxy->id, msg);
Willy Tarreaue6b98942007-10-29 01:09:36 +0100928 else if (lerr & ERR_WARN)
Christopher Faulet767a84b2017-11-24 16:50:31 +0100929 ha_warning("Starting %s %s: %s\n",
930 proxy_type_str(curproxy), curproxy->id, msg);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200931 }
932
Willy Tarreaue6b98942007-10-29 01:09:36 +0100933 err |= lerr;
934 if (lerr & (ERR_ABORT | ERR_FATAL)) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200935 pxerr |= 1;
Willy Tarreaue6b98942007-10-29 01:09:36 +0100936 break;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200937 }
Willy Tarreaue6b98942007-10-29 01:09:36 +0100938 else if (lerr & ERR_CODE) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200939 pxerr |= 1;
940 continue;
941 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200942 }
943
944 if (!pxerr) {
Willy Tarreau562515c2011-07-25 08:11:52 +0200945 curproxy->state = PR_STREADY;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200946 send_log(curproxy, LOG_NOTICE, "Proxy %s started.\n", curproxy->id);
947 }
Willy Tarreaue6b98942007-10-29 01:09:36 +0100948
949 if (err & ERR_ABORT)
950 break;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200951 }
952
953 return err;
954}
955
956
957/*
Willy Tarreau918ff602011-07-25 16:33:49 +0200958 * This is the proxy management task. It enables proxies when there are enough
Willy Tarreau87b09662015-04-03 00:22:06 +0200959 * free streams, or stops them when the table is full. It is designed to be
Willy Tarreau918ff602011-07-25 16:33:49 +0200960 * called as a task which is woken up upon stopping or when rate limiting must
961 * be enforced.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200962 */
Olivier Houchard9f6af332018-05-25 14:04:04 +0200963struct task *manage_proxy(struct task *t, void *context, unsigned short state)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200964{
Olivier Houchard9f6af332018-05-25 14:04:04 +0200965 struct proxy *p = context;
Willy Tarreau918ff602011-07-25 16:33:49 +0200966 int next = TICK_ETERNITY;
Willy Tarreau79584222009-03-06 09:18:27 +0100967 unsigned int wait;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200968
Willy Tarreau918ff602011-07-25 16:33:49 +0200969 /* We should periodically try to enable listeners waiting for a
970 * global resource here.
971 */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200972
Willy Tarreau918ff602011-07-25 16:33:49 +0200973 /* first, let's check if we need to stop the proxy */
974 if (unlikely(stopping && p->state != PR_STSTOPPED)) {
975 int t;
976 t = tick_remain(now_ms, p->stop_time);
977 if (t == 0) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100978 ha_warning("Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n",
979 p->id, p->fe_counters.cum_conn, p->be_counters.cum_conn);
Willy Tarreau918ff602011-07-25 16:33:49 +0200980 send_log(p, LOG_WARNING, "Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n",
981 p->id, p->fe_counters.cum_conn, p->be_counters.cum_conn);
982 stop_proxy(p);
983 /* try to free more memory */
Willy Tarreaubafbe012017-11-24 17:34:44 +0100984 pool_gc(NULL);
Willy Tarreau918ff602011-07-25 16:33:49 +0200985 }
986 else {
987 next = tick_first(next, p->stop_time);
988 }
989 }
Willy Tarreauf3f8c702011-07-25 07:37:28 +0200990
Willy Tarreau3a925c12013-09-04 17:54:01 +0200991 /* If the proxy holds a stick table, we need to purge all unused
992 * entries. These are all the ones in the table with ref_cnt == 0
993 * and all the ones in the pool used to allocate new entries. Any
Willy Tarreau87b09662015-04-03 00:22:06 +0200994 * entry attached to an existing stream waiting for a store will
Willy Tarreau3a925c12013-09-04 17:54:01 +0200995 * be in neither list. Any entry being dumped will have ref_cnt > 0.
996 * However we protect tables that are being synced to peers.
997 */
Frédéric Lécaille1b8e68e2019-03-14 07:07:41 +0100998 if (unlikely(stopping && p->state == PR_STSTOPPED && p->table && p->table->current)) {
999 if (!p->table->syncing) {
1000 stktable_trash_oldest(p->table, p->table->current);
Willy Tarreaubafbe012017-11-24 17:34:44 +01001001 pool_gc(NULL);
Willy Tarreau3a925c12013-09-04 17:54:01 +02001002 }
Frédéric Lécaille1b8e68e2019-03-14 07:07:41 +01001003 if (p->table->current) {
Willy Tarreau3a925c12013-09-04 17:54:01 +02001004 /* some entries still remain, let's recheck in one second */
1005 next = tick_first(next, tick_add(now_ms, 1000));
1006 }
1007 }
1008
Willy Tarreau918ff602011-07-25 16:33:49 +02001009 /* the rest below is just for frontends */
1010 if (!(p->cap & PR_CAP_FE))
1011 goto out;
Willy Tarreauf3f8c702011-07-25 07:37:28 +02001012
Willy Tarreau918ff602011-07-25 16:33:49 +02001013 /* check the various reasons we may find to block the frontend */
1014 if (unlikely(p->feconn >= p->maxconn)) {
1015 if (p->state == PR_STREADY)
1016 p->state = PR_STFULL;
1017 goto out;
1018 }
Willy Tarreau3a7d2072009-03-05 23:48:25 +01001019
Willy Tarreau918ff602011-07-25 16:33:49 +02001020 /* OK we have no reason to block, so let's unblock if we were blocking */
1021 if (p->state == PR_STFULL)
1022 p->state = PR_STREADY;
Willy Tarreau3a7d2072009-03-05 23:48:25 +01001023
Willy Tarreau918ff602011-07-25 16:33:49 +02001024 if (p->fe_sps_lim &&
1025 (wait = next_event_delay(&p->fe_sess_per_sec, p->fe_sps_lim, 0))) {
1026 /* we're blocking because a limit was reached on the number of
1027 * requests/s on the frontend. We want to re-check ASAP, which
1028 * means in 1 ms before estimated expiration date, because the
1029 * timer will have settled down.
1030 */
1031 next = tick_first(next, tick_add(now_ms, wait));
1032 goto out;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001033 }
Willy Tarreau918ff602011-07-25 16:33:49 +02001034
1035 /* The proxy is not limited so we can re-enable any waiting listener */
Willy Tarreau241797a2019-12-10 14:10:52 +01001036 dequeue_proxy_listeners(p);
Willy Tarreau918ff602011-07-25 16:33:49 +02001037 out:
1038 t->expire = next;
1039 task_queue(t);
1040 return t;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001041}
1042
1043
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001044static int proxy_parse_hard_stop_after(char **args, int section_type, struct proxy *curpx,
1045 struct proxy *defpx, const char *file, int line,
1046 char **err)
1047{
1048 const char *res;
1049
1050 if (!*args[1]) {
1051 memprintf(err, "'%s' expects <time> as argument.\n", args[0]);
1052 return -1;
1053 }
1054 res = parse_time_err(args[1], &global.hard_stop_after, TIME_UNIT_MS);
Willy Tarreau9faebe32019-06-07 19:00:37 +02001055 if (res == PARSE_TIME_OVER) {
1056 memprintf(err, "timer overflow in argument '%s' to '%s' (maximum value is 2147483647 ms or ~24.8 days)",
1057 args[1], args[0]);
1058 return -1;
1059 }
1060 else if (res == PARSE_TIME_UNDER) {
1061 memprintf(err, "timer underflow in argument '%s' to '%s' (minimum non-null value is 1 ms)",
1062 args[1], args[0]);
1063 return -1;
1064 }
1065 else if (res) {
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001066 memprintf(err, "unexpected character '%c' in argument to <%s>.\n", *res, args[0]);
1067 return -1;
1068 }
1069 return 0;
1070}
1071
Olivier Houchard9f6af332018-05-25 14:04:04 +02001072struct task *hard_stop(struct task *t, void *context, unsigned short state)
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001073{
1074 struct proxy *p;
1075 struct stream *s;
1076
1077 if (killed) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001078 ha_warning("Some tasks resisted to hard-stop, exiting now.\n");
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001079 send_log(NULL, LOG_WARNING, "Some tasks resisted to hard-stop, exiting now.\n");
Willy Tarreau7067b3a2019-06-02 11:11:29 +02001080 killed = 2;
1081 t->expire = TICK_ETERNITY;
1082 return t;
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001083 }
1084
Christopher Faulet767a84b2017-11-24 16:50:31 +01001085 ha_warning("soft-stop running for too long, performing a hard-stop.\n");
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001086 send_log(NULL, LOG_WARNING, "soft-stop running for too long, performing a hard-stop.\n");
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001087 p = proxies_list;
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001088 while (p) {
1089 if ((p->cap & PR_CAP_FE) && (p->feconn > 0)) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001090 ha_warning("Proxy %s hard-stopped (%d remaining conns will be closed).\n",
1091 p->id, p->feconn);
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001092 send_log(p, LOG_WARNING, "Proxy %s hard-stopped (%d remaining conns will be closed).\n",
1093 p->id, p->feconn);
1094 }
1095 p = p->next;
1096 }
1097 list_for_each_entry(s, &streams, list) {
1098 stream_shutdown(s, SF_ERR_KILLED);
1099 }
1100
1101 killed = 1;
1102 t->expire = tick_add(now_ms, MS_TO_TICKS(1000));
1103 return t;
1104}
1105
Willy Tarreaubaaee002006-06-26 02:48:02 +02001106/*
1107 * this function disables health-check servers so that the process will quickly be ignored
1108 * by load balancers. Note that if a proxy was already in the PAUSED state, then its grace
1109 * time will not be used since it would already not listen anymore to the socket.
1110 */
1111void soft_stop(void)
1112{
1113 struct proxy *p;
Willy Tarreaubbe11b12011-07-25 11:16:24 +02001114 struct peers *prs;
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001115 struct task *task;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001116
1117 stopping = 1;
William Dauchy3894d972019-12-28 15:36:02 +01001118 /* disable busy polling to avoid cpu eating for the new process */
1119 global.tune.options &= ~GTUNE_BUSY_POLLING;
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001120 if (tick_isset(global.hard_stop_after)) {
Emeric Brunc60def82017-09-27 14:59:38 +02001121 task = task_new(MAX_THREADS_MASK);
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001122 if (task) {
1123 task->process = hard_stop;
1124 task_schedule(task, tick_add(now_ms, global.hard_stop_after));
1125 }
1126 else {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001127 ha_alert("out of memory trying to allocate the hard-stop task.\n");
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001128 }
1129 }
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001130 p = proxies_list;
Willy Tarreaub0b37bc2008-06-23 14:00:57 +02001131 tv_update_date(0,1); /* else, the old time before select will be used */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001132 while (p) {
Olivier Houchard1fc05162017-04-06 01:05:05 +02001133 /* Zombie proxy, let's close the file descriptors */
1134 if (p->state == PR_STSTOPPED &&
1135 !LIST_ISEMPTY(&p->conf.listeners) &&
1136 LIST_ELEM(p->conf.listeners.n,
Willy Tarreau67878d72019-12-10 07:11:35 +01001137 struct listener *, by_fe)->state > LI_ASSIGNED) {
Olivier Houchard1fc05162017-04-06 01:05:05 +02001138 struct listener *l;
1139 list_for_each_entry(l, &p->conf.listeners, by_fe) {
Willy Tarreau67878d72019-12-10 07:11:35 +01001140 if (l->state > LI_ASSIGNED)
Olivier Houchard1fc05162017-04-06 01:05:05 +02001141 close(l->fd);
1142 l->state = LI_INIT;
1143 }
1144 }
1145
Willy Tarreaubaaee002006-06-26 02:48:02 +02001146 if (p->state != PR_STSTOPPED) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001147 ha_warning("Stopping %s %s in %d ms.\n", proxy_cap_str(p->cap), p->id, p->grace);
Willy Tarreauf8fbcef2008-10-10 17:51:34 +02001148 send_log(p, LOG_WARNING, "Stopping %s %s in %d ms.\n", proxy_cap_str(p->cap), p->id, p->grace);
Willy Tarreau0c303ee2008-07-07 00:09:58 +02001149 p->stop_time = tick_add(now_ms, p->grace);
Emeric Brun5a8c0a92010-09-23 18:44:36 +02001150
Willy Tarreau20b7afb2015-09-28 16:35:04 +02001151 /* Note: do not wake up stopped proxies' task nor their tables'
1152 * tasks as these ones might point to already released entries.
1153 */
Frédéric Lécaille1b8e68e2019-03-14 07:07:41 +01001154 if (p->table && p->table->size && p->table->sync_task)
1155 task_wakeup(p->table->sync_task, TASK_WOKEN_MSG);
Willy Tarreau20b7afb2015-09-28 16:35:04 +02001156
1157 if (p->task)
1158 task_wakeup(p->task, TASK_WOKEN_MSG);
1159 }
Willy Tarreaubaaee002006-06-26 02:48:02 +02001160 p = p->next;
1161 }
Willy Tarreaubbe11b12011-07-25 11:16:24 +02001162
Frédéric Lécailleed2b4a62017-07-13 09:07:09 +02001163 prs = cfg_peers;
Willy Tarreaubbe11b12011-07-25 11:16:24 +02001164 while (prs) {
Willy Tarreau337a6662015-09-28 16:27:44 +02001165 if (prs->peers_fe)
1166 stop_proxy(prs->peers_fe);
Willy Tarreaubbe11b12011-07-25 11:16:24 +02001167 prs = prs->next;
1168 }
Willy Tarreaud0807c32010-08-27 18:26:11 +02001169 /* signal zero is used to broadcast the "stopping" event */
1170 signal_handler(0);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001171}
1172
1173
Willy Tarreaube58c382011-07-24 18:28:10 +02001174/* Temporarily disables listening on all of the proxy's listeners. Upon
1175 * success, the proxy enters the PR_PAUSED state. If disabling at least one
1176 * listener returns an error, then the proxy state is set to PR_STERROR
Willy Tarreauce8fe252011-09-07 19:14:57 +02001177 * because we don't know how to resume from this. The function returns 0
1178 * if it fails, or non-zero on success.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001179 */
Willy Tarreauce8fe252011-09-07 19:14:57 +02001180int pause_proxy(struct proxy *p)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001181{
1182 struct listener *l;
Willy Tarreauce8fe252011-09-07 19:14:57 +02001183
1184 if (!(p->cap & PR_CAP_FE) || p->state == PR_STERROR ||
1185 p->state == PR_STSTOPPED || p->state == PR_STPAUSED)
1186 return 1;
1187
Christopher Faulet767a84b2017-11-24 16:50:31 +01001188 ha_warning("Pausing %s %s.\n", proxy_cap_str(p->cap), p->id);
Willy Tarreauce8fe252011-09-07 19:14:57 +02001189 send_log(p, LOG_WARNING, "Pausing %s %s.\n", proxy_cap_str(p->cap), p->id);
1190
Willy Tarreau4348fad2012-09-20 16:48:07 +02001191 list_for_each_entry(l, &p->conf.listeners, by_fe) {
Willy Tarreaube58c382011-07-24 18:28:10 +02001192 if (!pause_listener(l))
Willy Tarreaubaaee002006-06-26 02:48:02 +02001193 p->state = PR_STERROR;
1194 }
Willy Tarreauce8fe252011-09-07 19:14:57 +02001195
1196 if (p->state == PR_STERROR) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001197 ha_warning("%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id);
Willy Tarreauce8fe252011-09-07 19:14:57 +02001198 send_log(p, LOG_WARNING, "%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id);
1199 return 0;
1200 }
1201
1202 p->state = PR_STPAUSED;
1203 return 1;
Willy Tarreauda250db2008-10-12 12:07:48 +02001204}
1205
Olivier Houchard1fc05162017-04-06 01:05:05 +02001206/* This function makes the proxy unusable, but keeps the listening sockets
1207 * opened, so that if any process requests them, we are able to serve them.
1208 * This should only be called early, before we started accepting requests.
1209 */
1210void zombify_proxy(struct proxy *p)
1211{
1212 struct listener *l;
1213 struct listener *first_to_listen = NULL;
1214
1215 list_for_each_entry(l, &p->conf.listeners, by_fe) {
1216 enum li_state oldstate = l->state;
1217
1218 unbind_listener_no_close(l);
1219 if (l->state >= LI_ASSIGNED) {
1220 delete_listener(l);
Olivier Houchard1fc05162017-04-06 01:05:05 +02001221 }
1222 /*
1223 * Pretend we're still up and running so that the fd
1224 * will be sent if asked.
1225 */
1226 l->state = LI_ZOMBIE;
1227 if (!first_to_listen && oldstate >= LI_LISTEN)
1228 first_to_listen = l;
1229 }
1230 /* Quick hack : at stop time, to know we have to close the sockets
1231 * despite the proxy being marked as stopped, make the first listener
1232 * of the listener list an active one, so that we don't have to
1233 * parse the whole list to be sure.
1234 */
1235 if (first_to_listen && LIST_ELEM(p->conf.listeners.n,
1236 struct listener *, by_fe) != first_to_listen) {
1237 LIST_DEL(&l->by_fe);
1238 LIST_ADD(&p->conf.listeners, &l->by_fe);
1239 }
1240
1241 p->state = PR_STSTOPPED;
1242}
Willy Tarreauda250db2008-10-12 12:07:48 +02001243
1244/*
1245 * This function completely stops a proxy and releases its listeners. It has
1246 * to be called when going down in order to release the ports so that another
1247 * process may bind to them. It must also be called on disabled proxies at the
William Lallemandc59f9882018-11-16 16:57:21 +01001248 * end of start-up. If all listeners are closed, the proxy is set to the
Willy Tarreau3de3cd42019-07-24 17:42:44 +02001249 * PR_STSTOPPED state. The function takes the proxy's lock so it's safe to
1250 * call from multiple places.
Willy Tarreauda250db2008-10-12 12:07:48 +02001251 */
1252void stop_proxy(struct proxy *p)
1253{
1254 struct listener *l;
William Lallemandc59f9882018-11-16 16:57:21 +01001255 int nostop = 0;
Willy Tarreauda250db2008-10-12 12:07:48 +02001256
Willy Tarreau3de3cd42019-07-24 17:42:44 +02001257 HA_SPIN_LOCK(PROXY_LOCK, &p->lock);
1258
Willy Tarreau4348fad2012-09-20 16:48:07 +02001259 list_for_each_entry(l, &p->conf.listeners, by_fe) {
William Lallemandc59f9882018-11-16 16:57:21 +01001260 if (l->options & LI_O_NOSTOP) {
1261 HA_ATOMIC_ADD(&unstoppable_jobs, 1);
1262 nostop = 1;
1263 continue;
1264 }
William Lallemandf7f488d2019-10-18 21:16:39 +02001265 /* The master should not close an inherited FD */
1266 if (master && (l->options & LI_O_INHERITED))
1267 unbind_listener_no_close(l);
1268 else
1269 unbind_listener(l);
Willy Tarreauda250db2008-10-12 12:07:48 +02001270 if (l->state >= LI_ASSIGNED) {
1271 delete_listener(l);
Willy Tarreauda250db2008-10-12 12:07:48 +02001272 }
1273 }
William Lallemandc59f9882018-11-16 16:57:21 +01001274 if (!nostop)
1275 p->state = PR_STSTOPPED;
Willy Tarreau3de3cd42019-07-24 17:42:44 +02001276
1277 HA_SPIN_UNLOCK(PROXY_LOCK, &p->lock);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001278}
1279
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001280/* This function resumes listening on the specified proxy. It scans all of its
1281 * listeners and tries to enable them all. If any of them fails, the proxy is
1282 * put back to the paused state. It returns 1 upon success, or zero if an error
1283 * is encountered.
1284 */
1285int resume_proxy(struct proxy *p)
1286{
1287 struct listener *l;
1288 int fail;
1289
1290 if (p->state != PR_STPAUSED)
1291 return 1;
1292
Christopher Faulet767a84b2017-11-24 16:50:31 +01001293 ha_warning("Enabling %s %s.\n", proxy_cap_str(p->cap), p->id);
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001294 send_log(p, LOG_WARNING, "Enabling %s %s.\n", proxy_cap_str(p->cap), p->id);
1295
1296 fail = 0;
Willy Tarreau4348fad2012-09-20 16:48:07 +02001297 list_for_each_entry(l, &p->conf.listeners, by_fe) {
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001298 if (!resume_listener(l)) {
1299 int port;
1300
1301 port = get_host_port(&l->addr);
1302 if (port) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001303 ha_warning("Port %d busy while trying to enable %s %s.\n",
1304 port, proxy_cap_str(p->cap), p->id);
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001305 send_log(p, LOG_WARNING, "Port %d busy while trying to enable %s %s.\n",
1306 port, proxy_cap_str(p->cap), p->id);
1307 }
1308 else {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001309 ha_warning("Bind on socket %d busy while trying to enable %s %s.\n",
1310 l->luid, proxy_cap_str(p->cap), p->id);
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001311 send_log(p, LOG_WARNING, "Bind on socket %d busy while trying to enable %s %s.\n",
1312 l->luid, proxy_cap_str(p->cap), p->id);
1313 }
1314
1315 /* Another port might have been enabled. Let's stop everything. */
1316 fail = 1;
1317 break;
1318 }
1319 }
1320
1321 p->state = PR_STREADY;
1322 if (fail) {
1323 pause_proxy(p);
1324 return 0;
1325 }
1326 return 1;
1327}
1328
Willy Tarreaubaaee002006-06-26 02:48:02 +02001329/*
1330 * This function temporarily disables listening so that another new instance
1331 * can start listening. It is designed to be called upon reception of a
1332 * SIGTTOU, after which either a SIGUSR1 can be sent to completely stop
1333 * the proxy, or a SIGTTIN can be sent to listen again.
1334 */
1335void pause_proxies(void)
1336{
1337 int err;
1338 struct proxy *p;
Emeric Brun5a8c0a92010-09-23 18:44:36 +02001339 struct peers *prs;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001340
1341 err = 0;
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001342 p = proxies_list;
Willy Tarreaub0b37bc2008-06-23 14:00:57 +02001343 tv_update_date(0,1); /* else, the old time before select will be used */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001344 while (p) {
Willy Tarreauce8fe252011-09-07 19:14:57 +02001345 err |= !pause_proxy(p);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001346 p = p->next;
1347 }
Emeric Brun5a8c0a92010-09-23 18:44:36 +02001348
Frédéric Lécailleed2b4a62017-07-13 09:07:09 +02001349 prs = cfg_peers;
Emeric Brun5a8c0a92010-09-23 18:44:36 +02001350 while (prs) {
Willy Tarreau337a6662015-09-28 16:27:44 +02001351 if (prs->peers_fe)
1352 err |= !pause_proxy(prs->peers_fe);
Willy Tarreauce8fe252011-09-07 19:14:57 +02001353 prs = prs->next;
Emeric Brun5a8c0a92010-09-23 18:44:36 +02001354 }
1355
Willy Tarreaubaaee002006-06-26 02:48:02 +02001356 if (err) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001357 ha_warning("Some proxies refused to pause, performing soft stop now.\n");
Willy Tarreaubaaee002006-06-26 02:48:02 +02001358 send_log(p, LOG_WARNING, "Some proxies refused to pause, performing soft stop now.\n");
1359 soft_stop();
1360 }
1361}
1362
1363
1364/*
1365 * This function reactivates listening. This can be used after a call to
1366 * sig_pause(), for example when a new instance has failed starting up.
1367 * It is designed to be called upon reception of a SIGTTIN.
1368 */
Willy Tarreaube58c382011-07-24 18:28:10 +02001369void resume_proxies(void)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001370{
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001371 int err;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001372 struct proxy *p;
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001373 struct peers *prs;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001374
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001375 err = 0;
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001376 p = proxies_list;
Willy Tarreaub0b37bc2008-06-23 14:00:57 +02001377 tv_update_date(0,1); /* else, the old time before select will be used */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001378 while (p) {
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001379 err |= !resume_proxy(p);
1380 p = p->next;
1381 }
Willy Tarreaubaaee002006-06-26 02:48:02 +02001382
Frédéric Lécailleed2b4a62017-07-13 09:07:09 +02001383 prs = cfg_peers;
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001384 while (prs) {
Willy Tarreau337a6662015-09-28 16:27:44 +02001385 if (prs->peers_fe)
1386 err |= !resume_proxy(prs->peers_fe);
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001387 prs = prs->next;
1388 }
Willy Tarreaube58c382011-07-24 18:28:10 +02001389
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001390 if (err) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001391 ha_warning("Some proxies refused to resume, a restart is probably needed to resume safe operations.\n");
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001392 send_log(p, LOG_WARNING, "Some proxies refused to resume, a restart is probably needed to resume safe operations.\n");
Willy Tarreaubaaee002006-06-26 02:48:02 +02001393 }
1394}
1395
Willy Tarreau87b09662015-04-03 00:22:06 +02001396/* Set current stream's backend to <be>. Nothing is done if the
1397 * stream already had a backend assigned, which is indicated by
Willy Tarreaue7dff022015-04-03 01:14:29 +02001398 * s->flags & SF_BE_ASSIGNED.
Willy Tarreau1d0dfb12009-07-07 15:10:31 +02001399 * All flags, stats and counters which need be updated are updated.
Willy Tarreaubedb9ba2009-07-12 08:27:39 +02001400 * Returns 1 if done, 0 in case of internal error, eg: lack of resource.
Willy Tarreau1d0dfb12009-07-07 15:10:31 +02001401 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001402int stream_set_backend(struct stream *s, struct proxy *be)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +02001403{
Willy Tarreaue7dff022015-04-03 01:14:29 +02001404 if (s->flags & SF_BE_ASSIGNED)
Willy Tarreaubedb9ba2009-07-12 08:27:39 +02001405 return 1;
Christopher Faulet41179042016-06-21 11:54:52 +02001406
1407 if (flt_set_stream_backend(s, be) < 0)
1408 return 0;
1409
Willy Tarreau1d0dfb12009-07-07 15:10:31 +02001410 s->be = be;
Christopher Fauletff8abcd2017-06-02 15:33:24 +02001411 HA_ATOMIC_UPDATE_MAX(&be->be_counters.conn_max,
1412 HA_ATOMIC_ADD(&be->beconn, 1));
Willy Tarreau1d0dfb12009-07-07 15:10:31 +02001413 proxy_inc_be_ctr(be);
1414
Willy Tarreau87b09662015-04-03 00:22:06 +02001415 /* assign new parameters to the stream from the new backend */
Willy Tarreauf27b5ea2009-10-03 22:01:18 +02001416 s->si[1].flags &= ~SI_FL_INDEP_STR;
1417 if (be->options2 & PR_O2_INDEPSTR)
1418 s->si[1].flags |= SI_FL_INDEP_STR;
1419
Hongbo Longe39683c2017-03-10 18:41:51 +01001420 if (tick_isset(be->timeout.serverfin))
1421 s->si[1].hcto = be->timeout.serverfin;
1422
Willy Tarreau9fbe18e2015-05-01 22:42:08 +02001423 /* We want to enable the backend-specific analysers except those which
1424 * were already run as part of the frontend/listener. Note that it would
1425 * be more reliable to store the list of analysers that have been run,
1426 * but what we do here is OK for now.
1427 */
Christopher Faulet70e2f272017-01-09 16:33:19 +01001428 s->req.analysers |= be->be_req_ana & ~(strm_li(s) ? strm_li(s)->analysers : 0);
Willy Tarreau9fbe18e2015-05-01 22:42:08 +02001429
Willy Tarreau51aecc72009-07-12 09:47:04 +02001430 /* If the target backend requires HTTP processing, we have to allocate
Christopher Faulet711ed6a2019-07-16 14:16:10 +02001431 * the HTTP transaction if we did not have one.
Willy Tarreau51aecc72009-07-12 09:47:04 +02001432 */
Willy Tarreaueee5b512015-04-03 23:46:31 +02001433 if (unlikely(!s->txn && be->http_needed)) {
1434 if (unlikely(!http_alloc_txn(s)))
Willy Tarreau51aecc72009-07-12 09:47:04 +02001435 return 0; /* not enough memory */
Willy Tarreau39e4f622010-05-31 17:01:36 +02001436
1437 /* and now initialize the HTTP transaction state */
1438 http_init_txn(s);
Willy Tarreau51aecc72009-07-12 09:47:04 +02001439 }
1440
Christopher Faulet309c6412015-12-02 09:57:32 +01001441 /* Be sure to filter request headers if the backend is an HTTP proxy and
1442 * if there are filters attached to the stream. */
1443 if (s->be->mode == PR_MODE_HTTP && HAS_FILTERS(s))
Christopher Faulet0184ea72017-01-05 14:06:34 +01001444 s->req.analysers |= AN_REQ_FLT_HTTP_HDRS;
Christopher Faulet309c6412015-12-02 09:57:32 +01001445
Willy Tarreaueee5b512015-04-03 23:46:31 +02001446 if (s->txn) {
Christopher Fauletbbe68542019-04-08 10:53:51 +02001447 /* If we chain a TCP frontend to an HTX backend, we must upgrade
1448 * the client mux */
Christopher Faulet60d29b32019-07-15 15:00:25 +02001449 if (!IS_HTX_STRM(s) && be->mode == PR_MODE_HTTP) {
Christopher Fauletbbe68542019-04-08 10:53:51 +02001450 struct connection *conn = objt_conn(strm_sess(s)->origin);
1451 struct conn_stream *cs = objt_cs(s->si[0].end);
1452
1453 if (conn && cs) {
1454 si_rx_endp_more(&s->si[0]);
Olivier Houchard2ab3dad2019-07-03 13:08:18 +02001455 /* Make sure we're unsubscribed, the the new
1456 * mux will probably want to subscribe to
1457 * the underlying XPRT
1458 */
1459 if (s->si[0].wait_event.events)
1460 conn->mux->unsubscribe(cs, s->si[0].wait_event.events,
1461 &s->si[0].wait_event);
Christopher Fauletc985f6c2019-07-15 11:42:52 +02001462 if (conn_upgrade_mux_fe(conn, cs, &s->req.buf, ist(""), PROTO_MODE_HTTP) == -1)
Christopher Fauletbbe68542019-04-08 10:53:51 +02001463 return 0;
Olivier Houchard4c18f942019-07-31 18:05:26 +02001464 if (!strcmp(conn->mux->name, "H2")) {
1465 /* For HTTP/2, destroy the conn_stream,
1466 * disable logging, and pretend that we
1467 * failed, to that the stream is
1468 * silently destroyed. The new mux
1469 * will create new streams.
1470 */
Olivier Houchard59dd06d2019-08-09 18:01:15 +02001471 cs_free(cs);
Olivier Houchard4c18f942019-07-31 18:05:26 +02001472 si_detach_endpoint(&s->si[0]);
1473 s->logs.logwait = 0;
1474 s->logs.level = 0;
1475 s->flags |= SF_IGNORE;
1476 return 0;
1477 }
Olivier Houchard71b20c22019-08-09 17:50:05 +02001478 s->flags |= SF_HTX;
Christopher Fauletbbe68542019-04-08 10:53:51 +02001479 }
1480 }
Christopher Fauleteec7f8a2019-12-20 15:59:20 +01001481 else if (IS_HTX_STRM(s) && be->mode != PR_MODE_HTTP) {
1482 /* If a TCP backend is assgiend to an HTX stream, return
1483 * an error. It may happens for a new stream on a
1484 * previously upgraded connnections. */
1485 if (!(s->flags & SF_ERR_MASK))
1486 s->flags |= SF_ERR_INTERNAL;
1487 return 0;
1488 }
Christopher Fauletbbe68542019-04-08 10:53:51 +02001489
Willy Tarreau9fbe18e2015-05-01 22:42:08 +02001490 /* we may request to parse a request body */
Christopher Faulet711ed6a2019-07-16 14:16:10 +02001491 if (be->options & PR_O_WREQ_BODY)
Willy Tarreau9fbe18e2015-05-01 22:42:08 +02001492 s->req.analysers |= AN_REQ_HTTP_BODY;
Willy Tarreaueee5b512015-04-03 23:46:31 +02001493 }
1494
1495 s->flags |= SF_BE_ASSIGNED;
Willy Tarreau96e31212011-05-30 18:10:30 +02001496 if (be->options2 & PR_O2_NODELAY) {
Willy Tarreau22ec1ea2014-11-27 20:45:39 +01001497 s->req.flags |= CF_NEVER_WAIT;
1498 s->res.flags |= CF_NEVER_WAIT;
Willy Tarreau96e31212011-05-30 18:10:30 +02001499 }
1500
Willy Tarreaubedb9ba2009-07-12 08:27:39 +02001501 return 1;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +02001502}
1503
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001504/* Capture a bad request or response and archive it in the proxy's structure.
1505 * It is relatively protocol-agnostic so it requires that a number of elements
1506 * are passed :
1507 * - <proxy> is the proxy where the error was detected and where the snapshot
1508 * needs to be stored
Joseph Herlant59dd2952018-11-15 11:46:55 -08001509 * - <is_back> indicates that the error happened when receiving the response
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001510 * - <other_end> is a pointer to the proxy on the other side when known
1511 * - <target> is the target of the connection, usually a server or a proxy
1512 * - <sess> is the session which experienced the error
1513 * - <ctx> may be NULL or should contain any info relevant to the protocol
1514 * - <buf> is the buffer containing the offending data
1515 * - <buf_ofs> is the position of this buffer's input data in the input
1516 * stream, starting at zero. It may be passed as zero if unknown.
1517 * - <buf_out> is the portion of <buf->data> which was already forwarded and
1518 * which precedes the buffer's input. The buffer's input starts at
1519 * buf->head + buf_out.
1520 * - <err_pos> is the pointer to the faulty byte in the buffer's input.
1521 * - <show> is the callback to use to display <ctx>. It may be NULL.
1522 */
1523void proxy_capture_error(struct proxy *proxy, int is_back,
1524 struct proxy *other_end, enum obj_type *target,
1525 const struct session *sess,
1526 const struct buffer *buf, long buf_ofs,
1527 unsigned int buf_out, unsigned int err_pos,
1528 const union error_snapshot_ctx *ctx,
1529 void (*show)(struct buffer *, const struct error_snapshot *))
1530{
1531 struct error_snapshot *es;
1532 unsigned int buf_len;
1533 int len1, len2;
Willy Tarreauc55015e2018-09-07 19:02:32 +02001534 unsigned int ev_id;
1535
1536 ev_id = HA_ATOMIC_XADD(&error_snapshot_id, 1);
1537
Willy Tarreau4bc7d902018-09-07 20:07:17 +02001538 buf_len = b_data(buf) - buf_out;
1539
1540 es = malloc(sizeof(*es) + buf_len);
Willy Tarreauc55015e2018-09-07 19:02:32 +02001541 if (!es)
1542 return;
1543
Willy Tarreau4bc7d902018-09-07 20:07:17 +02001544 es->buf_len = buf_len;
1545 es->ev_id = ev_id;
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001546
Christopher Faulet47a72102020-01-06 11:37:00 +01001547 len1 = b_size(buf) - b_peek_ofs(buf, buf_out);
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001548 if (len1 > buf_len)
1549 len1 = buf_len;
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001550
Willy Tarreau4bc7d902018-09-07 20:07:17 +02001551 if (len1) {
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001552 memcpy(es->buf, b_peek(buf, buf_out), len1);
Willy Tarreau4bc7d902018-09-07 20:07:17 +02001553 len2 = buf_len - len1;
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001554 if (len2)
1555 memcpy(es->buf + len1, b_orig(buf), len2);
1556 }
1557
1558 es->buf_err = err_pos;
1559 es->when = date; // user-visible date
1560 es->srv = objt_server(target);
1561 es->oe = other_end;
Willy Tarreau026efc72019-07-17 15:20:02 +02001562 if (objt_conn(sess->origin) && conn_get_src(__objt_conn(sess->origin)))
1563 es->src = *__objt_conn(sess->origin)->src;
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001564 else
1565 memset(&es->src, 0, sizeof(es->src));
1566
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001567 es->buf_wrap = b_wrap(buf) - b_peek(buf, buf_out);
1568 es->buf_out = buf_out;
1569 es->buf_ofs = buf_ofs;
1570
1571 /* be sure to indicate the offset of the first IN byte */
1572 if (es->buf_ofs >= es->buf_len)
1573 es->buf_ofs -= es->buf_len;
1574 else
1575 es->buf_ofs = 0;
1576
1577 /* protocol-specific part now */
1578 if (ctx)
1579 es->ctx = *ctx;
1580 else
1581 memset(&es->ctx, 0, sizeof(es->ctx));
1582 es->show = show;
Willy Tarreauc55015e2018-09-07 19:02:32 +02001583
1584 /* note: we still lock since we have to be certain that nobody is
1585 * dumping the output while we free.
1586 */
1587 HA_SPIN_LOCK(PROXY_LOCK, &proxy->lock);
1588 if (is_back) {
1589 es = HA_ATOMIC_XCHG(&proxy->invalid_rep, es);
1590 } else {
1591 es = HA_ATOMIC_XCHG(&proxy->invalid_req, es);
1592 }
1593 free(es);
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001594 HA_SPIN_UNLOCK(PROXY_LOCK, &proxy->lock);
1595}
1596
Willy Tarreauc8d5b952019-02-27 17:25:52 +01001597/* Configure all proxies which lack a maxconn setting to use the global one by
1598 * default. This avoids the common mistake consisting in setting maxconn only
1599 * in the global section and discovering the hard way that it doesn't propagate
1600 * through the frontends. These values are also propagated through the various
1601 * targetted backends, whose fullconn is finally calculated if not yet set.
1602 */
1603void proxy_adjust_all_maxconn()
1604{
1605 struct proxy *curproxy;
1606 struct switching_rule *swrule1, *swrule2;
1607
1608 for (curproxy = proxies_list; curproxy; curproxy = curproxy->next) {
1609 if (curproxy->state == PR_STSTOPPED)
1610 continue;
1611
1612 if (!(curproxy->cap & PR_CAP_FE))
1613 continue;
1614
1615 if (!curproxy->maxconn)
1616 curproxy->maxconn = global.maxconn;
1617
1618 /* update the target backend's fullconn count : default_backend */
1619 if (curproxy->defbe.be)
1620 curproxy->defbe.be->tot_fe_maxconn += curproxy->maxconn;
1621 else if ((curproxy->cap & PR_CAP_LISTEN) == PR_CAP_LISTEN)
1622 curproxy->tot_fe_maxconn += curproxy->maxconn;
1623
1624 list_for_each_entry(swrule1, &curproxy->switching_rules, list) {
1625 /* For each target of switching rules, we update their
1626 * tot_fe_maxconn, except if a previous rule points to
1627 * the same backend or to the default backend.
1628 */
1629 if (swrule1->be.backend != curproxy->defbe.be) {
Frédéric Lécaille2365fb02019-03-07 15:02:52 +01001630 /* note: swrule1->be.backend isn't a backend if the rule
1631 * is dynamic, it's an expression instead, so it must not
1632 * be dereferenced as a backend before being certain it is.
1633 */
Willy Tarreauc8d5b952019-02-27 17:25:52 +01001634 list_for_each_entry(swrule2, &curproxy->switching_rules, list) {
1635 if (swrule2 == swrule1) {
Frédéric Lécaille2365fb02019-03-07 15:02:52 +01001636 if (!swrule1->dynamic)
1637 swrule1->be.backend->tot_fe_maxconn += curproxy->maxconn;
Willy Tarreauc8d5b952019-02-27 17:25:52 +01001638 break;
1639 }
1640 else if (!swrule2->dynamic && swrule2->be.backend == swrule1->be.backend) {
1641 /* there are multiple refs of this backend */
1642 break;
1643 }
1644 }
1645 }
1646 }
1647 }
1648
1649 /* automatically compute fullconn if not set. We must not do it in the
1650 * loop above because cross-references are not yet fully resolved.
1651 */
1652 for (curproxy = proxies_list; curproxy; curproxy = curproxy->next) {
1653 if (curproxy->state == PR_STSTOPPED)
1654 continue;
1655
1656 /* If <fullconn> is not set, let's set it to 10% of the sum of
1657 * the possible incoming frontend's maxconns.
1658 */
1659 if (!curproxy->fullconn && (curproxy->cap & PR_CAP_BE)) {
1660 /* we have the sum of the maxconns in <total>. We only
1661 * keep 10% of that sum to set the default fullconn, with
1662 * a hard minimum of 1 (to avoid a divide by zero).
1663 */
1664 curproxy->fullconn = (curproxy->tot_fe_maxconn + 9) / 10;
1665 if (!curproxy->fullconn)
1666 curproxy->fullconn = 1;
1667 }
1668 }
1669}
1670
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001671/* Config keywords below */
1672
Willy Tarreaudc13c112013-06-21 23:16:39 +02001673static struct cfg_kw_list cfg_kws = {ILH, {
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001674 { CFG_GLOBAL, "hard-stop-after", proxy_parse_hard_stop_after },
Willy Tarreau9de1bbd2008-07-09 20:34:27 +02001675 { CFG_LISTEN, "timeout", proxy_parse_timeout },
Tim Duesterhus86e6b6e2019-05-14 20:57:59 +02001676 { CFG_LISTEN, "clitimeout", proxy_parse_timeout }, /* This keyword actually fails to parse, this line remains for better error messages. */
1677 { CFG_LISTEN, "contimeout", proxy_parse_timeout }, /* This keyword actually fails to parse, this line remains for better error messages. */
1678 { CFG_LISTEN, "srvtimeout", proxy_parse_timeout }, /* This keyword actually fails to parse, this line remains for better error messages. */
Willy Tarreau3a7d2072009-03-05 23:48:25 +01001679 { CFG_LISTEN, "rate-limit", proxy_parse_rate_limit },
Willy Tarreauc35362a2014-04-25 13:58:37 +02001680 { CFG_LISTEN, "max-keep-alive-queue", proxy_parse_max_ka_queue },
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +02001681 { CFG_LISTEN, "declare", proxy_parse_declare },
Olivier Houcharda254a372019-04-05 15:30:12 +02001682 { CFG_LISTEN, "retry-on", proxy_parse_retry_on },
Willy Tarreau9de1bbd2008-07-09 20:34:27 +02001683 { 0, NULL, NULL },
1684}};
1685
Willy Tarreau0108d902018-11-25 19:14:37 +01001686INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);
1687
Willy Tarreau960f2cb2016-11-24 12:02:29 +01001688/* Expects to find a frontend named <arg> and returns it, otherwise displays various
1689 * adequate error messages and returns NULL. This function is designed to be used by
1690 * functions requiring a frontend on the CLI.
1691 */
1692struct proxy *cli_find_frontend(struct appctx *appctx, const char *arg)
1693{
1694 struct proxy *px;
1695
1696 if (!*arg) {
Willy Tarreau9d008692019-08-09 11:21:01 +02001697 cli_err(appctx, "A frontend name is expected.\n");
Willy Tarreau960f2cb2016-11-24 12:02:29 +01001698 return NULL;
1699 }
1700
1701 px = proxy_fe_by_name(arg);
1702 if (!px) {
Willy Tarreau9d008692019-08-09 11:21:01 +02001703 cli_err(appctx, "No such frontend.\n");
Willy Tarreau960f2cb2016-11-24 12:02:29 +01001704 return NULL;
1705 }
1706 return px;
1707}
1708
Olivier Houchard614f8d72017-03-14 20:08:46 +01001709/* Expects to find a backend named <arg> and returns it, otherwise displays various
1710 * adequate error messages and returns NULL. This function is designed to be used by
1711 * functions requiring a frontend on the CLI.
1712 */
1713struct proxy *cli_find_backend(struct appctx *appctx, const char *arg)
1714{
1715 struct proxy *px;
1716
1717 if (!*arg) {
Willy Tarreau9d008692019-08-09 11:21:01 +02001718 cli_err(appctx, "A backend name is expected.\n");
Olivier Houchard614f8d72017-03-14 20:08:46 +01001719 return NULL;
1720 }
1721
1722 px = proxy_be_by_name(arg);
1723 if (!px) {
Willy Tarreau9d008692019-08-09 11:21:01 +02001724 cli_err(appctx, "No such backend.\n");
Olivier Houchard614f8d72017-03-14 20:08:46 +01001725 return NULL;
1726 }
1727 return px;
1728}
1729
1730
William Lallemanda6c5f332016-11-19 02:25:36 +01001731/* parse a "show servers" CLI line, returns 0 if it wants to start the dump or
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001732 * 1 if it stops immediately. If an argument is specified, it will set the proxy
1733 * pointer into cli.p0 and its ID into cli.i0.
William Lallemanda6c5f332016-11-19 02:25:36 +01001734 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02001735static int cli_parse_show_servers(char **args, char *payload, struct appctx *appctx, void *private)
William Lallemanda6c5f332016-11-19 02:25:36 +01001736{
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001737 struct proxy *px;
William Lallemanda6c5f332016-11-19 02:25:36 +01001738
1739 /* check if a backend name has been provided */
1740 if (*args[3]) {
1741 /* read server state from local file */
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001742 px = proxy_be_by_name(args[3]);
William Lallemanda6c5f332016-11-19 02:25:36 +01001743
Willy Tarreau9d008692019-08-09 11:21:01 +02001744 if (!px)
1745 return cli_err(appctx, "Can't find backend.\n");
1746
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001747 appctx->ctx.cli.p0 = px;
1748 appctx->ctx.cli.i0 = px->uuid;
William Lallemanda6c5f332016-11-19 02:25:36 +01001749 }
1750 return 0;
1751}
1752
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001753/* dumps server state information into <buf> for all the servers found in backend cli.p0.
William Lallemanda6c5f332016-11-19 02:25:36 +01001754 * These information are all the parameters which may change during HAProxy runtime.
1755 * By default, we only export to the last known server state file format.
1756 * These information can be used at next startup to recover same level of server state.
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001757 * It uses the proxy pointer from cli.p0, the proxy's id from cli.i0 and the server's
1758 * pointer from cli.p1.
William Lallemanda6c5f332016-11-19 02:25:36 +01001759 */
Willy Tarreau83061a82018-07-13 11:56:34 +02001760static int dump_servers_state(struct stream_interface *si, struct buffer *buf)
William Lallemanda6c5f332016-11-19 02:25:36 +01001761{
1762 struct appctx *appctx = __objt_appctx(si->end);
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001763 struct proxy *px = appctx->ctx.cli.p0;
William Lallemanda6c5f332016-11-19 02:25:36 +01001764 struct server *srv;
1765 char srv_addr[INET6_ADDRSTRLEN + 1];
1766 time_t srv_time_since_last_change;
1767 int bk_f_forced_id, srv_f_forced_id;
Baptiste Assmann6d0f38f2018-07-02 17:00:54 +02001768 char *srvrecord;
William Lallemanda6c5f332016-11-19 02:25:36 +01001769
William Lallemanda6c5f332016-11-19 02:25:36 +01001770 /* we don't want to report any state if the backend is not enabled on this process */
Willy Tarreau6daac192019-02-02 17:39:53 +01001771 if (!(proc_mask(px->bind_proc) & pid_bit))
William Lallemanda6c5f332016-11-19 02:25:36 +01001772 return 1;
1773
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001774 if (!appctx->ctx.cli.p1)
1775 appctx->ctx.cli.p1 = px->srv;
William Lallemanda6c5f332016-11-19 02:25:36 +01001776
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001777 for (; appctx->ctx.cli.p1 != NULL; appctx->ctx.cli.p1 = srv->next) {
1778 srv = appctx->ctx.cli.p1;
William Lallemanda6c5f332016-11-19 02:25:36 +01001779 srv_addr[0] = '\0';
1780
1781 switch (srv->addr.ss_family) {
1782 case AF_INET:
1783 inet_ntop(srv->addr.ss_family, &((struct sockaddr_in *)&srv->addr)->sin_addr,
1784 srv_addr, INET_ADDRSTRLEN + 1);
1785 break;
1786 case AF_INET6:
1787 inet_ntop(srv->addr.ss_family, &((struct sockaddr_in6 *)&srv->addr)->sin6_addr,
1788 srv_addr, INET6_ADDRSTRLEN + 1);
1789 break;
Daniel Corbett9215ffa2018-05-19 19:43:24 -04001790 default:
1791 memcpy(srv_addr, "-\0", 2);
1792 break;
William Lallemanda6c5f332016-11-19 02:25:36 +01001793 }
1794 srv_time_since_last_change = now.tv_sec - srv->last_change;
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001795 bk_f_forced_id = px->options & PR_O_FORCED_ID ? 1 : 0;
William Lallemanda6c5f332016-11-19 02:25:36 +01001796 srv_f_forced_id = srv->flags & SRV_F_FORCED_ID ? 1 : 0;
1797
Baptiste Assmann6d0f38f2018-07-02 17:00:54 +02001798 srvrecord = NULL;
1799 if (srv->srvrq && srv->srvrq->name)
1800 srvrecord = srv->srvrq->name;
1801
William Lallemanda6c5f332016-11-19 02:25:36 +01001802 chunk_appendf(buf,
1803 "%d %s "
1804 "%d %s %s "
1805 "%d %d %d %d %ld "
1806 "%d %d %d %d %d "
Baptiste Assmann6d0f38f2018-07-02 17:00:54 +02001807 "%d %d %s %u %s"
William Lallemanda6c5f332016-11-19 02:25:36 +01001808 "\n",
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001809 px->uuid, px->id,
William Lallemanda6c5f332016-11-19 02:25:36 +01001810 srv->puid, srv->id, srv_addr,
Emeric Brun52a91d32017-08-31 14:41:55 +02001811 srv->cur_state, srv->cur_admin, srv->uweight, srv->iweight, (long int)srv_time_since_last_change,
William Lallemanda6c5f332016-11-19 02:25:36 +01001812 srv->check.status, srv->check.result, srv->check.health, srv->check.state, srv->agent.state,
Baptiste Assmann6d0f38f2018-07-02 17:00:54 +02001813 bk_f_forced_id, srv_f_forced_id, srv->hostname ? srv->hostname : "-", srv->svc_port,
1814 srvrecord ? srvrecord : "-");
Willy Tarreau06d80a92017-10-19 14:32:15 +02001815 if (ci_putchk(si_ic(si), &trash) == -1) {
Willy Tarreaudb398432018-11-15 11:08:52 +01001816 si_rx_room_blk(si);
William Lallemanda6c5f332016-11-19 02:25:36 +01001817 return 0;
1818 }
1819 }
1820 return 1;
1821}
1822
1823/* Parses backend list or simply use backend name provided by the user to return
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001824 * states of servers to stdout. It dumps proxy <cli.p0> and stops if <cli.i0> is
1825 * non-null.
William Lallemanda6c5f332016-11-19 02:25:36 +01001826 */
1827static int cli_io_handler_servers_state(struct appctx *appctx)
1828{
1829 struct stream_interface *si = appctx->owner;
William Lallemanda6c5f332016-11-19 02:25:36 +01001830 struct proxy *curproxy;
1831
1832 chunk_reset(&trash);
1833
1834 if (appctx->st2 == STAT_ST_INIT) {
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001835 if (!appctx->ctx.cli.p0)
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001836 appctx->ctx.cli.p0 = proxies_list;
William Lallemanda6c5f332016-11-19 02:25:36 +01001837 appctx->st2 = STAT_ST_HEAD;
1838 }
1839
1840 if (appctx->st2 == STAT_ST_HEAD) {
1841 chunk_printf(&trash, "%d\n# %s\n", SRV_STATE_FILE_VERSION, SRV_STATE_FILE_FIELD_NAMES);
Willy Tarreau06d80a92017-10-19 14:32:15 +02001842 if (ci_putchk(si_ic(si), &trash) == -1) {
Willy Tarreaudb398432018-11-15 11:08:52 +01001843 si_rx_room_blk(si);
William Lallemanda6c5f332016-11-19 02:25:36 +01001844 return 0;
1845 }
1846 appctx->st2 = STAT_ST_INFO;
1847 }
1848
1849 /* STAT_ST_INFO */
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001850 for (; appctx->ctx.cli.p0 != NULL; appctx->ctx.cli.p0 = curproxy->next) {
1851 curproxy = appctx->ctx.cli.p0;
William Lallemanda6c5f332016-11-19 02:25:36 +01001852 /* servers are only in backends */
1853 if (curproxy->cap & PR_CAP_BE) {
1854 if (!dump_servers_state(si, &trash))
1855 return 0;
William Lallemanda6c5f332016-11-19 02:25:36 +01001856 }
1857 /* only the selected proxy is dumped */
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001858 if (appctx->ctx.cli.i0)
William Lallemanda6c5f332016-11-19 02:25:36 +01001859 break;
1860 }
1861
1862 return 1;
1863}
1864
Willy Tarreau608ea592016-12-16 18:01:15 +01001865/* Parses backend list and simply report backend names. It keeps the proxy
1866 * pointer in cli.p0.
1867 */
William Lallemand933efcd2016-11-22 12:34:16 +01001868static int cli_io_handler_show_backend(struct appctx *appctx)
1869{
William Lallemand933efcd2016-11-22 12:34:16 +01001870 struct stream_interface *si = appctx->owner;
1871 struct proxy *curproxy;
1872
1873 chunk_reset(&trash);
1874
Willy Tarreau608ea592016-12-16 18:01:15 +01001875 if (!appctx->ctx.cli.p0) {
William Lallemand933efcd2016-11-22 12:34:16 +01001876 chunk_printf(&trash, "# name\n");
Willy Tarreau06d80a92017-10-19 14:32:15 +02001877 if (ci_putchk(si_ic(si), &trash) == -1) {
Willy Tarreaudb398432018-11-15 11:08:52 +01001878 si_rx_room_blk(si);
William Lallemand933efcd2016-11-22 12:34:16 +01001879 return 0;
1880 }
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001881 appctx->ctx.cli.p0 = proxies_list;
William Lallemand933efcd2016-11-22 12:34:16 +01001882 }
1883
Willy Tarreau608ea592016-12-16 18:01:15 +01001884 for (; appctx->ctx.cli.p0 != NULL; appctx->ctx.cli.p0 = curproxy->next) {
1885 curproxy = appctx->ctx.cli.p0;
William Lallemand933efcd2016-11-22 12:34:16 +01001886
1887 /* looking for backends only */
1888 if (!(curproxy->cap & PR_CAP_BE))
1889 continue;
1890
1891 /* we don't want to list a backend which is bound to this process */
Willy Tarreau6daac192019-02-02 17:39:53 +01001892 if (!(proc_mask(curproxy->bind_proc) & pid_bit))
William Lallemand933efcd2016-11-22 12:34:16 +01001893 continue;
1894
1895 chunk_appendf(&trash, "%s\n", curproxy->id);
Willy Tarreau06d80a92017-10-19 14:32:15 +02001896 if (ci_putchk(si_ic(si), &trash) == -1) {
Willy Tarreaudb398432018-11-15 11:08:52 +01001897 si_rx_room_blk(si);
William Lallemand933efcd2016-11-22 12:34:16 +01001898 return 0;
1899 }
1900 }
1901
1902 return 1;
1903}
William Lallemanda6c5f332016-11-19 02:25:36 +01001904
Willy Tarreaua275a372018-08-21 14:50:44 +02001905/* Parses the "enable dynamic-cookies backend" directive, it always returns 1.
1906 *
1907 * Grabs the proxy lock and each server's lock.
1908 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02001909static int cli_parse_enable_dyncookie_backend(char **args, char *payload, struct appctx *appctx, void *private)
Olivier Houchard614f8d72017-03-14 20:08:46 +01001910{
1911 struct proxy *px;
1912 struct server *s;
1913
1914 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
1915 return 1;
1916
1917 px = cli_find_backend(appctx, args[3]);
1918 if (!px)
1919 return 1;
1920
Willy Tarreau5e83d992019-07-30 11:59:34 +02001921 /* Note: this lock is to make sure this doesn't change while another
1922 * thread is in srv_set_dyncookie().
1923 */
Willy Tarreaua275a372018-08-21 14:50:44 +02001924 HA_SPIN_LOCK(PROXY_LOCK, &px->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01001925 px->ck_opts |= PR_CK_DYNAMIC;
Willy Tarreau5e83d992019-07-30 11:59:34 +02001926 HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01001927
Willy Tarreaua275a372018-08-21 14:50:44 +02001928 for (s = px->srv; s != NULL; s = s->next) {
1929 HA_SPIN_LOCK(SERVER_LOCK, &s->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01001930 srv_set_dyncookie(s);
Willy Tarreaua275a372018-08-21 14:50:44 +02001931 HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);
1932 }
1933
Olivier Houchard614f8d72017-03-14 20:08:46 +01001934 return 1;
1935}
1936
Willy Tarreaua275a372018-08-21 14:50:44 +02001937/* Parses the "disable dynamic-cookies backend" directive, it always returns 1.
1938 *
1939 * Grabs the proxy lock and each server's lock.
1940 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02001941static int cli_parse_disable_dyncookie_backend(char **args, char *payload, struct appctx *appctx, void *private)
Olivier Houchard614f8d72017-03-14 20:08:46 +01001942{
1943 struct proxy *px;
1944 struct server *s;
1945
1946 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
1947 return 1;
1948
1949 px = cli_find_backend(appctx, args[3]);
1950 if (!px)
1951 return 1;
1952
Willy Tarreau5e83d992019-07-30 11:59:34 +02001953 /* Note: this lock is to make sure this doesn't change while another
1954 * thread is in srv_set_dyncookie().
1955 */
Willy Tarreaua275a372018-08-21 14:50:44 +02001956 HA_SPIN_LOCK(PROXY_LOCK, &px->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01001957 px->ck_opts &= ~PR_CK_DYNAMIC;
Willy Tarreau5e83d992019-07-30 11:59:34 +02001958 HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01001959
1960 for (s = px->srv; s != NULL; s = s->next) {
Willy Tarreaua275a372018-08-21 14:50:44 +02001961 HA_SPIN_LOCK(SERVER_LOCK, &s->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01001962 if (!(s->flags & SRV_F_COOKIESET)) {
1963 free(s->cookie);
1964 s->cookie = NULL;
1965 }
Willy Tarreaua275a372018-08-21 14:50:44 +02001966 HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01001967 }
1968
1969 return 1;
1970}
1971
Willy Tarreaua275a372018-08-21 14:50:44 +02001972/* Parses the "set dynamic-cookie-key backend" directive, it always returns 1.
1973 *
1974 * Grabs the proxy lock and each server's lock.
1975 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02001976static int cli_parse_set_dyncookie_key_backend(char **args, char *payload, struct appctx *appctx, void *private)
Olivier Houchard614f8d72017-03-14 20:08:46 +01001977{
1978 struct proxy *px;
1979 struct server *s;
1980 char *newkey;
1981
1982 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
1983 return 1;
1984
1985 px = cli_find_backend(appctx, args[3]);
1986 if (!px)
1987 return 1;
1988
Willy Tarreau9d008692019-08-09 11:21:01 +02001989 if (!*args[4])
1990 return cli_err(appctx, "String value expected.\n");
Olivier Houchard614f8d72017-03-14 20:08:46 +01001991
1992 newkey = strdup(args[4]);
Willy Tarreau9d008692019-08-09 11:21:01 +02001993 if (!newkey)
1994 return cli_err(appctx, "Failed to allocate memory.\n");
Willy Tarreaua275a372018-08-21 14:50:44 +02001995
Willy Tarreau5e83d992019-07-30 11:59:34 +02001996 /* Note: this lock is to make sure this doesn't change while another
1997 * thread is in srv_set_dyncookie().
1998 */
Willy Tarreaua275a372018-08-21 14:50:44 +02001999 HA_SPIN_LOCK(PROXY_LOCK, &px->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01002000 free(px->dyncookie_key);
2001 px->dyncookie_key = newkey;
Willy Tarreau5e83d992019-07-30 11:59:34 +02002002 HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01002003
Willy Tarreaua275a372018-08-21 14:50:44 +02002004 for (s = px->srv; s != NULL; s = s->next) {
2005 HA_SPIN_LOCK(SERVER_LOCK, &s->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01002006 srv_set_dyncookie(s);
Willy Tarreaua275a372018-08-21 14:50:44 +02002007 HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);
2008 }
2009
Olivier Houchard614f8d72017-03-14 20:08:46 +01002010 return 1;
2011}
2012
Willy Tarreaua275a372018-08-21 14:50:44 +02002013/* Parses the "set maxconn frontend" directive, it always returns 1.
2014 *
2015 * Grabs the proxy lock.
2016 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02002017static int cli_parse_set_maxconn_frontend(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreauc429a1f2016-11-23 16:22:04 +01002018{
2019 struct proxy *px;
2020 struct listener *l;
2021 int v;
2022
2023 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
2024 return 1;
2025
2026 px = cli_find_frontend(appctx, args[3]);
2027 if (!px)
2028 return 1;
2029
Willy Tarreau9d008692019-08-09 11:21:01 +02002030 if (!*args[4])
2031 return cli_err(appctx, "Integer value expected.\n");
Willy Tarreauc429a1f2016-11-23 16:22:04 +01002032
2033 v = atoi(args[4]);
Willy Tarreau9d008692019-08-09 11:21:01 +02002034 if (v < 0)
2035 return cli_err(appctx, "Value out of range.\n");
Willy Tarreauc429a1f2016-11-23 16:22:04 +01002036
2037 /* OK, the value is fine, so we assign it to the proxy and to all of
2038 * its listeners. The blocked ones will be dequeued.
2039 */
Willy Tarreaua275a372018-08-21 14:50:44 +02002040 HA_SPIN_LOCK(PROXY_LOCK, &px->lock);
2041
Willy Tarreauc429a1f2016-11-23 16:22:04 +01002042 px->maxconn = v;
2043 list_for_each_entry(l, &px->conf.listeners, by_fe) {
Willy Tarreauc429a1f2016-11-23 16:22:04 +01002044 if (l->state == LI_FULL)
2045 resume_listener(l);
2046 }
2047
Willy Tarreau241797a2019-12-10 14:10:52 +01002048 if (px->maxconn > px->feconn)
2049 dequeue_proxy_listeners(px);
Willy Tarreauc429a1f2016-11-23 16:22:04 +01002050
Willy Tarreaua275a372018-08-21 14:50:44 +02002051 HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock);
2052
Willy Tarreauc429a1f2016-11-23 16:22:04 +01002053 return 1;
2054}
2055
Willy Tarreaua275a372018-08-21 14:50:44 +02002056/* Parses the "shutdown frontend" directive, it always returns 1.
2057 *
2058 * Grabs the proxy lock.
2059 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02002060static int cli_parse_shutdown_frontend(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreau5212d7f2016-11-24 11:13:06 +01002061{
2062 struct proxy *px;
2063
2064 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
2065 return 1;
2066
2067 px = cli_find_frontend(appctx, args[2]);
2068 if (!px)
2069 return 1;
2070
Willy Tarreau9d008692019-08-09 11:21:01 +02002071 if (px->state == PR_STSTOPPED)
2072 return cli_msg(appctx, LOG_NOTICE, "Frontend was already shut down.\n");
Willy Tarreau5212d7f2016-11-24 11:13:06 +01002073
Christopher Faulet767a84b2017-11-24 16:50:31 +01002074 ha_warning("Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n",
2075 px->id, px->fe_counters.cum_conn, px->be_counters.cum_conn);
Willy Tarreau5212d7f2016-11-24 11:13:06 +01002076 send_log(px, LOG_WARNING, "Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n",
2077 px->id, px->fe_counters.cum_conn, px->be_counters.cum_conn);
Willy Tarreaua275a372018-08-21 14:50:44 +02002078
Willy Tarreau5212d7f2016-11-24 11:13:06 +01002079 stop_proxy(px);
2080 return 1;
2081}
2082
Willy Tarreaua275a372018-08-21 14:50:44 +02002083/* Parses the "disable frontend" directive, it always returns 1.
2084 *
2085 * Grabs the proxy lock.
2086 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02002087static int cli_parse_disable_frontend(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreau15b9e682016-11-24 11:55:28 +01002088{
2089 struct proxy *px;
Willy Tarreaua275a372018-08-21 14:50:44 +02002090 int ret;
Willy Tarreau15b9e682016-11-24 11:55:28 +01002091
2092 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
2093 return 1;
2094
2095 px = cli_find_frontend(appctx, args[2]);
2096 if (!px)
2097 return 1;
2098
Willy Tarreau9d008692019-08-09 11:21:01 +02002099 if (px->state == PR_STSTOPPED)
2100 return cli_msg(appctx, LOG_NOTICE, "Frontend was previously shut down, cannot disable.\n");
Willy Tarreau15b9e682016-11-24 11:55:28 +01002101
Willy Tarreau9d008692019-08-09 11:21:01 +02002102 if (px->state == PR_STPAUSED)
2103 return cli_msg(appctx, LOG_NOTICE, "Frontend is already disabled.\n");
Willy Tarreau15b9e682016-11-24 11:55:28 +01002104
Willy Tarreaua275a372018-08-21 14:50:44 +02002105 HA_SPIN_LOCK(PROXY_LOCK, &px->lock);
2106 ret = pause_proxy(px);
2107 HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock);
2108
Willy Tarreau9d008692019-08-09 11:21:01 +02002109 if (!ret)
2110 return cli_err(appctx, "Failed to pause frontend, check logs for precise cause.\n");
2111
Willy Tarreau15b9e682016-11-24 11:55:28 +01002112 return 1;
2113}
2114
Willy Tarreaua275a372018-08-21 14:50:44 +02002115/* Parses the "enable frontend" directive, it always returns 1.
2116 *
2117 * Grabs the proxy lock.
2118 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02002119static int cli_parse_enable_frontend(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreau15b9e682016-11-24 11:55:28 +01002120{
2121 struct proxy *px;
Willy Tarreaua275a372018-08-21 14:50:44 +02002122 int ret;
Willy Tarreau15b9e682016-11-24 11:55:28 +01002123
2124 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
2125 return 1;
2126
2127 px = cli_find_frontend(appctx, args[2]);
2128 if (!px)
2129 return 1;
2130
Willy Tarreau9d008692019-08-09 11:21:01 +02002131 if (px->state == PR_STSTOPPED)
2132 return cli_err(appctx, "Frontend was previously shut down, cannot enable.\n");
Willy Tarreau15b9e682016-11-24 11:55:28 +01002133
Willy Tarreau9d008692019-08-09 11:21:01 +02002134 if (px->state != PR_STPAUSED)
2135 return cli_msg(appctx, LOG_NOTICE, "Frontend is already enabled.\n");
Willy Tarreau15b9e682016-11-24 11:55:28 +01002136
Willy Tarreaua275a372018-08-21 14:50:44 +02002137 HA_SPIN_LOCK(PROXY_LOCK, &px->lock);
2138 ret = resume_proxy(px);
2139 HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock);
2140
Willy Tarreau9d008692019-08-09 11:21:01 +02002141 if (!ret)
2142 return cli_err(appctx, "Failed to resume frontend, check logs for precise cause (port conflict?).\n");
Willy Tarreau15b9e682016-11-24 11:55:28 +01002143 return 1;
2144}
2145
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002146/* "show errors" handler for the CLI. Returns 0 if wants to continue, 1 to stop
2147 * now.
2148 */
2149static int cli_parse_show_errors(char **args, char *payload, struct appctx *appctx, void *private)
2150{
2151 if (!cli_has_level(appctx, ACCESS_LVL_OPER))
2152 return 1;
2153
2154 if (*args[2]) {
2155 struct proxy *px;
2156
2157 px = proxy_find_by_name(args[2], 0, 0);
2158 if (px)
2159 appctx->ctx.errors.iid = px->uuid;
2160 else
2161 appctx->ctx.errors.iid = atoi(args[2]);
2162
Willy Tarreau9d008692019-08-09 11:21:01 +02002163 if (!appctx->ctx.errors.iid)
2164 return cli_err(appctx, "No such proxy.\n");
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002165 }
2166 else
2167 appctx->ctx.errors.iid = -1; // dump all proxies
2168
2169 appctx->ctx.errors.flag = 0;
2170 if (strcmp(args[3], "request") == 0)
2171 appctx->ctx.errors.flag |= 4; // ignore response
2172 else if (strcmp(args[3], "response") == 0)
2173 appctx->ctx.errors.flag |= 2; // ignore request
2174 appctx->ctx.errors.px = NULL;
2175 return 0;
2176}
2177
2178/* This function dumps all captured errors onto the stream interface's
2179 * read buffer. It returns 0 if the output buffer is full and it needs
2180 * to be called again, otherwise non-zero.
2181 */
2182static int cli_io_handler_show_errors(struct appctx *appctx)
2183{
2184 struct stream_interface *si = appctx->owner;
2185 extern const char *monthname[12];
2186
2187 if (unlikely(si_ic(si)->flags & (CF_WRITE_ERROR|CF_SHUTW)))
2188 return 1;
2189
2190 chunk_reset(&trash);
2191
2192 if (!appctx->ctx.errors.px) {
2193 /* the function had not been called yet, let's prepare the
2194 * buffer for a response.
2195 */
2196 struct tm tm;
2197
2198 get_localtime(date.tv_sec, &tm);
2199 chunk_appendf(&trash, "Total events captured on [%02d/%s/%04d:%02d:%02d:%02d.%03d] : %u\n",
2200 tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
2201 tm.tm_hour, tm.tm_min, tm.tm_sec, (int)(date.tv_usec/1000),
2202 error_snapshot_id);
2203
Willy Tarreau36b27362018-09-07 19:55:44 +02002204 if (ci_putchk(si_ic(si), &trash) == -1)
2205 goto cant_send;
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002206
2207 appctx->ctx.errors.px = proxies_list;
2208 appctx->ctx.errors.bol = 0;
2209 appctx->ctx.errors.ptr = -1;
2210 }
2211
2212 /* we have two inner loops here, one for the proxy, the other one for
2213 * the buffer.
2214 */
2215 while (appctx->ctx.errors.px) {
2216 struct error_snapshot *es;
2217
Willy Tarreau36b27362018-09-07 19:55:44 +02002218 HA_SPIN_LOCK(PROXY_LOCK, &appctx->ctx.errors.px->lock);
2219
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002220 if ((appctx->ctx.errors.flag & 1) == 0) {
Willy Tarreauc55015e2018-09-07 19:02:32 +02002221 es = appctx->ctx.errors.px->invalid_req;
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002222 if (appctx->ctx.errors.flag & 2) // skip req
2223 goto next;
2224 }
2225 else {
Willy Tarreauc55015e2018-09-07 19:02:32 +02002226 es = appctx->ctx.errors.px->invalid_rep;
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002227 if (appctx->ctx.errors.flag & 4) // skip resp
2228 goto next;
2229 }
2230
Willy Tarreauc55015e2018-09-07 19:02:32 +02002231 if (!es)
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002232 goto next;
2233
2234 if (appctx->ctx.errors.iid >= 0 &&
2235 appctx->ctx.errors.px->uuid != appctx->ctx.errors.iid &&
2236 es->oe->uuid != appctx->ctx.errors.iid)
2237 goto next;
2238
2239 if (appctx->ctx.errors.ptr < 0) {
2240 /* just print headers now */
2241
2242 char pn[INET6_ADDRSTRLEN];
2243 struct tm tm;
2244 int port;
2245
2246 get_localtime(es->when.tv_sec, &tm);
2247 chunk_appendf(&trash, " \n[%02d/%s/%04d:%02d:%02d:%02d.%03d]",
2248 tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
2249 tm.tm_hour, tm.tm_min, tm.tm_sec, (int)(es->when.tv_usec/1000));
2250
2251 switch (addr_to_str(&es->src, pn, sizeof(pn))) {
2252 case AF_INET:
2253 case AF_INET6:
2254 port = get_host_port(&es->src);
2255 break;
2256 default:
2257 port = 0;
2258 }
2259
2260 switch (appctx->ctx.errors.flag & 1) {
2261 case 0:
2262 chunk_appendf(&trash,
2263 " frontend %s (#%d): invalid request\n"
2264 " backend %s (#%d)",
2265 appctx->ctx.errors.px->id, appctx->ctx.errors.px->uuid,
2266 (es->oe->cap & PR_CAP_BE) ? es->oe->id : "<NONE>",
2267 (es->oe->cap & PR_CAP_BE) ? es->oe->uuid : -1);
2268 break;
2269 case 1:
2270 chunk_appendf(&trash,
2271 " backend %s (#%d): invalid response\n"
2272 " frontend %s (#%d)",
2273 appctx->ctx.errors.px->id, appctx->ctx.errors.px->uuid,
2274 es->oe->id, es->oe->uuid);
2275 break;
2276 }
2277
2278 chunk_appendf(&trash,
2279 ", server %s (#%d), event #%u, src %s:%d\n"
2280 " buffer starts at %llu (including %u out), %u free,\n"
2281 " len %u, wraps at %u, error at position %u\n",
2282 es->srv ? es->srv->id : "<NONE>",
2283 es->srv ? es->srv->puid : -1,
2284 es->ev_id, pn, port,
2285 es->buf_ofs, es->buf_out,
2286 global.tune.bufsize - es->buf_out - es->buf_len,
2287 es->buf_len, es->buf_wrap, es->buf_err);
2288
2289 if (es->show)
2290 es->show(&trash, es);
2291
2292 chunk_appendf(&trash, " \n");
2293
Willy Tarreau36b27362018-09-07 19:55:44 +02002294 if (ci_putchk(si_ic(si), &trash) == -1)
2295 goto cant_send_unlock;
2296
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002297 appctx->ctx.errors.ptr = 0;
2298 appctx->ctx.errors.ev_id = es->ev_id;
2299 }
2300
2301 if (appctx->ctx.errors.ev_id != es->ev_id) {
2302 /* the snapshot changed while we were dumping it */
2303 chunk_appendf(&trash,
2304 " WARNING! update detected on this snapshot, dump interrupted. Please re-check!\n");
Willy Tarreau36b27362018-09-07 19:55:44 +02002305 if (ci_putchk(si_ic(si), &trash) == -1)
2306 goto cant_send_unlock;
2307
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002308 goto next;
2309 }
2310
2311 /* OK, ptr >= 0, so we have to dump the current line */
Willy Tarreau4bc7d902018-09-07 20:07:17 +02002312 while (appctx->ctx.errors.ptr < es->buf_len && appctx->ctx.errors.ptr < global.tune.bufsize) {
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002313 int newptr;
2314 int newline;
2315
2316 newline = appctx->ctx.errors.bol;
2317 newptr = dump_text_line(&trash, es->buf, global.tune.bufsize, es->buf_len, &newline, appctx->ctx.errors.ptr);
2318 if (newptr == appctx->ctx.errors.ptr)
Willy Tarreau36b27362018-09-07 19:55:44 +02002319 goto cant_send_unlock;
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002320
Willy Tarreau36b27362018-09-07 19:55:44 +02002321 if (ci_putchk(si_ic(si), &trash) == -1)
2322 goto cant_send_unlock;
2323
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002324 appctx->ctx.errors.ptr = newptr;
2325 appctx->ctx.errors.bol = newline;
2326 };
2327 next:
Willy Tarreau36b27362018-09-07 19:55:44 +02002328 HA_SPIN_UNLOCK(PROXY_LOCK, &appctx->ctx.errors.px->lock);
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002329 appctx->ctx.errors.bol = 0;
2330 appctx->ctx.errors.ptr = -1;
2331 appctx->ctx.errors.flag ^= 1;
2332 if (!(appctx->ctx.errors.flag & 1))
2333 appctx->ctx.errors.px = appctx->ctx.errors.px->next;
2334 }
2335
2336 /* dump complete */
2337 return 1;
Willy Tarreau36b27362018-09-07 19:55:44 +02002338
2339 cant_send_unlock:
2340 HA_SPIN_UNLOCK(PROXY_LOCK, &appctx->ctx.errors.px->lock);
2341 cant_send:
Willy Tarreaudb398432018-11-15 11:08:52 +01002342 si_rx_room_blk(si);
Willy Tarreau36b27362018-09-07 19:55:44 +02002343 return 0;
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002344}
2345
William Lallemanda6c5f332016-11-19 02:25:36 +01002346/* register cli keywords */
2347static struct cli_kw_list cli_kws = {{ },{
Willy Tarreau15b9e682016-11-24 11:55:28 +01002348 { { "disable", "frontend", NULL }, "disable frontend : temporarily disable specific frontend", cli_parse_disable_frontend, NULL, NULL },
2349 { { "enable", "frontend", NULL }, "enable frontend : re-enable specific frontend", cli_parse_enable_frontend, NULL, NULL },
Willy Tarreauc429a1f2016-11-23 16:22:04 +01002350 { { "set", "maxconn", "frontend", NULL }, "set maxconn frontend : change a frontend's maxconn setting", cli_parse_set_maxconn_frontend, NULL },
William Lallemanda6c5f332016-11-19 02:25:36 +01002351 { { "show","servers", "state", NULL }, "show servers state [id]: dump volatile server information (for backend <id>)", cli_parse_show_servers, cli_io_handler_servers_state },
Willy Tarreau608ea592016-12-16 18:01:15 +01002352 { { "show", "backend", NULL }, "show backend : list backends in the current running config", NULL, cli_io_handler_show_backend },
Willy Tarreau5212d7f2016-11-24 11:13:06 +01002353 { { "shutdown", "frontend", NULL }, "shutdown frontend : stop a specific frontend", cli_parse_shutdown_frontend, NULL, NULL },
Olivier Houchard614f8d72017-03-14 20:08:46 +01002354 { { "set", "dynamic-cookie-key", "backend", NULL }, "set dynamic-cookie-key backend : change a backend secret key for dynamic cookies", cli_parse_set_dyncookie_key_backend, NULL },
2355 { { "enable", "dynamic-cookie", "backend", NULL }, "enable dynamic-cookie backend : enable dynamic cookies on a specific backend", cli_parse_enable_dyncookie_backend, NULL },
2356 { { "disable", "dynamic-cookie", "backend", NULL }, "disable dynamic-cookie backend : disable dynamic cookies on a specific backend", cli_parse_disable_dyncookie_backend, NULL },
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002357 { { "show", "errors", NULL }, "show errors : report last request and response errors for each proxy", cli_parse_show_errors, cli_io_handler_show_errors, NULL },
William Lallemanda6c5f332016-11-19 02:25:36 +01002358 {{},}
2359}};
2360
Willy Tarreau0108d902018-11-25 19:14:37 +01002361INITCALL1(STG_REGISTER, cli_register_kw, &cli_kws);
Willy Tarreaubaaee002006-06-26 02:48:02 +02002362
2363/*
2364 * Local variables:
2365 * c-indent-level: 8
2366 * c-basic-offset: 8
2367 * End:
2368 */