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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 Tarreaub2551052020-06-09 09:07:15 +020020#include <import/eb32tree.h>
21#include <import/ebistree.h>
22
Willy Tarreau4c7e4b72020-05-27 12:58:42 +020023#include <haproxy/api.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020024#include <haproxy/applet-t.h>
25#include <haproxy/capture-t.h>
Willy Tarreau6be78492020-06-05 00:00:29 +020026#include <haproxy/cfgparse.h>
Willy Tarreau83487a82020-06-04 20:19:54 +020027#include <haproxy/cli.h>
Willy Tarreau8d366972020-05-27 16:10:29 +020028#include <haproxy/errors.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020029#include <haproxy/fd.h>
Willy Tarreauc7babd82020-06-04 21:29:29 +020030#include <haproxy/filters.h>
Willy Tarreauf268ee82020-06-04 17:05:57 +020031#include <haproxy/global.h>
Willy Tarreauc2b1ff02020-06-04 21:21:03 +020032#include <haproxy/http_ana.h>
Willy Tarreau213e9902020-06-04 14:58:24 +020033#include <haproxy/listener.h>
Willy Tarreauaeed4a82020-06-04 22:01:04 +020034#include <haproxy/log.h>
Willy Tarreau8efbdfb2020-06-04 11:29:21 +020035#include <haproxy/obj_type-t.h>
Willy Tarreau3c2a7c22020-06-04 18:38:21 +020036#include <haproxy/peers.h>
Willy Tarreaud0ef4392020-06-02 09:38:52 +020037#include <haproxy/pool.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020038#include <haproxy/proto_tcp.h>
Willy Tarreaua264d962020-06-04 22:29:18 +020039#include <haproxy/proxy.h>
Willy Tarreau1e56f922020-06-04 23:20:13 +020040#include <haproxy/server-t.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020041#include <haproxy/signal.h>
Willy Tarreau2eec9b52020-06-04 19:58:55 +020042#include <haproxy/stats-t.h>
Willy Tarreaudfd3de82020-06-04 23:46:14 +020043#include <haproxy/stream.h>
Willy Tarreau5e539c92020-06-04 20:45:39 +020044#include <haproxy/stream_interface.h>
Willy Tarreaucea0e1b2020-06-04 17:25:40 +020045#include <haproxy/task.h>
Willy Tarreau92b4f132020-06-01 11:05:15 +020046#include <haproxy/time.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020047
Willy Tarreaubaaee002006-06-26 02:48:02 +020048
Willy Tarreau918ff602011-07-25 16:33:49 +020049int listeners; /* # of proxy listeners, set by cfgparse */
Olivier Houchardfbc74e82017-11-24 16:54:05 +010050struct proxy *proxies_list = NULL; /* list of all existing proxies */
Willy Tarreau53fb4ae2009-10-04 23:04:08 +020051struct eb_root used_proxy_id = EB_ROOT; /* list of proxy IDs in use */
Willy Tarreauf79d9502014-03-15 07:22:35 +010052struct eb_root proxy_by_name = EB_ROOT; /* tree of proxies sorted by name */
Willy Tarreau10479e42010-12-12 14:00:34 +010053unsigned int error_snapshot_id = 0; /* global ID assigned to each error then incremented */
Willy Tarreaubaaee002006-06-26 02:48:02 +020054
Willy Tarreau3a1f5fd2018-11-11 15:40:36 +010055/* proxy->options */
56const struct cfg_opt cfg_opts[] =
57{
58 { "abortonclose", PR_O_ABRT_CLOSE, PR_CAP_BE, 0, 0 },
59 { "allbackups", PR_O_USE_ALL_BK, PR_CAP_BE, 0, 0 },
60 { "checkcache", PR_O_CHK_CACHE, PR_CAP_BE, 0, PR_MODE_HTTP },
61 { "clitcpka", PR_O_TCP_CLI_KA, PR_CAP_FE, 0, 0 },
62 { "contstats", PR_O_CONTSTATS, PR_CAP_FE, 0, 0 },
63 { "dontlognull", PR_O_NULLNOLOG, PR_CAP_FE, 0, 0 },
64 { "http_proxy", PR_O_HTTP_PROXY, PR_CAP_FE | PR_CAP_BE, 0, PR_MODE_HTTP },
65 { "http-buffer-request", PR_O_WREQ_BODY, PR_CAP_FE | PR_CAP_BE, 0, PR_MODE_HTTP },
66 { "http-ignore-probes", PR_O_IGNORE_PRB, PR_CAP_FE, 0, PR_MODE_HTTP },
67 { "prefer-last-server", PR_O_PREF_LAST, PR_CAP_BE, 0, PR_MODE_HTTP },
68 { "logasap", PR_O_LOGASAP, PR_CAP_FE, 0, 0 },
69 { "nolinger", PR_O_TCP_NOLING, PR_CAP_FE | PR_CAP_BE, 0, 0 },
70 { "persist", PR_O_PERSIST, PR_CAP_BE, 0, 0 },
71 { "srvtcpka", PR_O_TCP_SRV_KA, PR_CAP_BE, 0, 0 },
Willy Tarreaue5733232019-05-22 19:24:06 +020072#ifdef USE_TPROXY
Willy Tarreau3a1f5fd2018-11-11 15:40:36 +010073 { "transparent", PR_O_TRANSP, PR_CAP_BE, 0, 0 },
74#else
75 { "transparent", 0, 0, 0, 0 },
76#endif
77
78 { NULL, 0, 0, 0, 0 }
79};
80
81/* proxy->options2 */
82const struct cfg_opt cfg_opts2[] =
83{
Willy Tarreaue5733232019-05-22 19:24:06 +020084#ifdef USE_LINUX_SPLICE
Willy Tarreau3a1f5fd2018-11-11 15:40:36 +010085 { "splice-request", PR_O2_SPLIC_REQ, PR_CAP_FE|PR_CAP_BE, 0, 0 },
86 { "splice-response", PR_O2_SPLIC_RTR, PR_CAP_FE|PR_CAP_BE, 0, 0 },
87 { "splice-auto", PR_O2_SPLIC_AUT, PR_CAP_FE|PR_CAP_BE, 0, 0 },
88#else
89 { "splice-request", 0, 0, 0, 0 },
90 { "splice-response", 0, 0, 0, 0 },
91 { "splice-auto", 0, 0, 0, 0 },
92#endif
93 { "accept-invalid-http-request", PR_O2_REQBUG_OK, PR_CAP_FE, 0, PR_MODE_HTTP },
94 { "accept-invalid-http-response", PR_O2_RSPBUG_OK, PR_CAP_BE, 0, PR_MODE_HTTP },
95 { "dontlog-normal", PR_O2_NOLOGNORM, PR_CAP_FE, 0, 0 },
96 { "log-separate-errors", PR_O2_LOGERRORS, PR_CAP_FE, 0, 0 },
97 { "log-health-checks", PR_O2_LOGHCHKS, PR_CAP_BE, 0, 0 },
98 { "socket-stats", PR_O2_SOCKSTAT, PR_CAP_FE, 0, 0 },
99 { "tcp-smart-accept", PR_O2_SMARTACC, PR_CAP_FE, 0, 0 },
100 { "tcp-smart-connect", PR_O2_SMARTCON, PR_CAP_BE, 0, 0 },
Willy Tarreau3a1f5fd2018-11-11 15:40:36 +0100101 { "independent-streams", PR_O2_INDEPSTR, PR_CAP_FE|PR_CAP_BE, 0, 0 },
102 { "http-use-proxy-header", PR_O2_USE_PXHDR, PR_CAP_FE, 0, PR_MODE_HTTP },
103 { "http-pretend-keepalive", PR_O2_FAKE_KA, PR_CAP_BE, 0, PR_MODE_HTTP },
104 { "http-no-delay", PR_O2_NODELAY, PR_CAP_FE|PR_CAP_BE, 0, PR_MODE_HTTP },
Christopher Faulet31930372019-07-15 10:16:58 +0200105 { "http-use-htx", 0, PR_CAP_FE|PR_CAP_BE, 0, 0 }, // deprecated
Christopher Faulet98fbe952019-07-22 16:18:24 +0200106
107 {"h1-case-adjust-bogus-client", PR_O2_H1_ADJ_BUGCLI, PR_CAP_FE, 0, PR_MODE_HTTP },
108 {"h1-case-adjust-bogus-server", PR_O2_H1_ADJ_BUGSRV, PR_CAP_BE, 0, PR_MODE_HTTP },
Christopher Faulet89aed322020-06-02 17:33:56 +0200109 {"disable-h2-upgrade", PR_O2_NO_H2_UPGRADE, PR_CAP_FE, 0, PR_MODE_HTTP },
Willy Tarreau3a1f5fd2018-11-11 15:40:36 +0100110 { NULL, 0, 0, 0 }
111};
112
Willy Tarreau977b8e42006-12-29 14:19:17 +0100113/*
Willy Tarreau816eb542007-11-04 07:04:43 +0100114 * This function returns a string containing a name describing capabilities to
115 * report comprehensible error messages. Specifically, it will return the words
Christopher Faulet898566e2016-10-26 11:06:28 +0200116 * "frontend", "backend" when appropriate, or "proxy" for all other
Willy Tarreau816eb542007-11-04 07:04:43 +0100117 * cases including the proxies declared in "listen" mode.
Willy Tarreau977b8e42006-12-29 14:19:17 +0100118 */
Willy Tarreau816eb542007-11-04 07:04:43 +0100119const char *proxy_cap_str(int cap)
Willy Tarreau977b8e42006-12-29 14:19:17 +0100120{
Willy Tarreau816eb542007-11-04 07:04:43 +0100121 if ((cap & PR_CAP_LISTEN) != PR_CAP_LISTEN) {
122 if (cap & PR_CAP_FE)
123 return "frontend";
124 else if (cap & PR_CAP_BE)
125 return "backend";
Willy Tarreau816eb542007-11-04 07:04:43 +0100126 }
127 return "proxy";
Willy Tarreau977b8e42006-12-29 14:19:17 +0100128}
129
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +0100130/*
131 * This function returns a string containing the mode of the proxy in a format
132 * suitable for error messages.
133 */
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +0100134const char *proxy_mode_str(int mode) {
135
136 if (mode == PR_MODE_TCP)
137 return "tcp";
138 else if (mode == PR_MODE_HTTP)
139 return "http";
140 else if (mode == PR_MODE_HEALTH)
141 return "health";
William Lallemandcf62f7e2018-10-26 14:47:40 +0200142 else if (mode == PR_MODE_CLI)
143 return "cli";
Krzysztof Piotr Oledzki6eb730d2007-11-03 23:41:58 +0100144 else
145 return "unknown";
146}
147
Willy Tarreauf3950172009-10-10 18:35:51 +0200148/*
149 * This function scans the list of backends and servers to retrieve the first
150 * backend and the first server with the given names, and sets them in both
151 * parameters. It returns zero if either is not found, or non-zero and sets
152 * the ones it did not found to NULL. If a NULL pointer is passed for the
153 * backend, only the pointer to the server will be updated.
154 */
155int get_backend_server(const char *bk_name, const char *sv_name,
156 struct proxy **bk, struct server **sv)
157{
158 struct proxy *p;
159 struct server *s;
Willy Tarreau7ecc4202014-03-15 07:57:11 +0100160 int sid;
Willy Tarreauf3950172009-10-10 18:35:51 +0200161
162 *sv = NULL;
163
Willy Tarreau050536d2012-10-04 08:47:34 +0200164 sid = -1;
Willy Tarreaucfeaa472009-10-10 22:33:08 +0200165 if (*sv_name == '#')
166 sid = atoi(sv_name + 1);
167
Willy Tarreau9e0bb102015-05-26 11:24:42 +0200168 p = proxy_be_by_name(bk_name);
Willy Tarreauf3950172009-10-10 18:35:51 +0200169 if (bk)
170 *bk = p;
171 if (!p)
172 return 0;
173
174 for (s = p->srv; s; s = s->next)
Willy Tarreau4055a102012-11-15 00:15:18 +0100175 if ((sid >= 0 && s->puid == sid) ||
176 (sid < 0 && strcmp(s->id, sv_name) == 0))
Willy Tarreauf3950172009-10-10 18:35:51 +0200177 break;
178 *sv = s;
179 if (!s)
180 return 0;
181 return 1;
182}
183
Willy Tarreaue219db72007-12-03 01:30:13 +0100184/* This function parses a "timeout" statement in a proxy section. It returns
185 * -1 if there is any error, 1 for a warning, otherwise zero. If it does not
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200186 * return zero, it will write an error or warning message into a preallocated
187 * buffer returned at <err>. The trailing is not be written. The function must
188 * be called with <args> pointing to the first command line word, with <proxy>
189 * pointing to the proxy being parsed, and <defpx> to the default proxy or NULL.
190 * As a special case for compatibility with older configs, it also accepts
191 * "{cli|srv|con}timeout" in args[0].
Willy Tarreaue219db72007-12-03 01:30:13 +0100192 */
Willy Tarreau9de1bbd2008-07-09 20:34:27 +0200193static int proxy_parse_timeout(char **args, int section, struct proxy *proxy,
Willy Tarreau28a47d62012-09-18 20:02:48 +0200194 struct proxy *defpx, const char *file, int line,
195 char **err)
Willy Tarreaue219db72007-12-03 01:30:13 +0100196{
197 unsigned timeout;
198 int retval, cap;
199 const char *res, *name;
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200200 int *tv = NULL;
201 int *td = NULL;
Willy Tarreaue219db72007-12-03 01:30:13 +0100202
203 retval = 0;
Willy Tarreau9de1bbd2008-07-09 20:34:27 +0200204
205 /* simply skip "timeout" but remain compatible with old form */
206 if (strcmp(args[0], "timeout") == 0)
207 args++;
208
Willy Tarreaue219db72007-12-03 01:30:13 +0100209 name = args[0];
Tim Duesterhus86e6b6e2019-05-14 20:57:59 +0200210 if (!strcmp(args[0], "client")) {
Willy Tarreaue219db72007-12-03 01:30:13 +0100211 name = "client";
Willy Tarreaud7c30f92007-12-03 01:38:36 +0100212 tv = &proxy->timeout.client;
213 td = &defpx->timeout.client;
Willy Tarreaue219db72007-12-03 01:30:13 +0100214 cap = PR_CAP_FE;
215 } else if (!strcmp(args[0], "tarpit")) {
216 tv = &proxy->timeout.tarpit;
217 td = &defpx->timeout.tarpit;
Willy Tarreau51c9bde2008-01-06 13:40:03 +0100218 cap = PR_CAP_FE | PR_CAP_BE;
Willy Tarreaub16a5742010-01-10 14:46:16 +0100219 } else if (!strcmp(args[0], "http-keep-alive")) {
220 tv = &proxy->timeout.httpka;
221 td = &defpx->timeout.httpka;
222 cap = PR_CAP_FE | PR_CAP_BE;
Willy Tarreau036fae02008-01-06 13:24:40 +0100223 } else if (!strcmp(args[0], "http-request")) {
224 tv = &proxy->timeout.httpreq;
225 td = &defpx->timeout.httpreq;
Willy Tarreaucd7afc02009-07-12 10:03:17 +0200226 cap = PR_CAP_FE | PR_CAP_BE;
Tim Duesterhus86e6b6e2019-05-14 20:57:59 +0200227 } else if (!strcmp(args[0], "server")) {
Willy Tarreaue219db72007-12-03 01:30:13 +0100228 name = "server";
Willy Tarreaud7c30f92007-12-03 01:38:36 +0100229 tv = &proxy->timeout.server;
230 td = &defpx->timeout.server;
Willy Tarreaue219db72007-12-03 01:30:13 +0100231 cap = PR_CAP_BE;
Tim Duesterhus86e6b6e2019-05-14 20:57:59 +0200232 } else if (!strcmp(args[0], "connect")) {
Willy Tarreaue219db72007-12-03 01:30:13 +0100233 name = "connect";
Willy Tarreaud7c30f92007-12-03 01:38:36 +0100234 tv = &proxy->timeout.connect;
235 td = &defpx->timeout.connect;
Willy Tarreaue219db72007-12-03 01:30:13 +0100236 cap = PR_CAP_BE;
Krzysztof Piotr Oledzki5259dfe2008-01-21 01:54:06 +0100237 } else if (!strcmp(args[0], "check")) {
238 tv = &proxy->timeout.check;
239 td = &defpx->timeout.check;
240 cap = PR_CAP_BE;
Willy Tarreaue219db72007-12-03 01:30:13 +0100241 } else if (!strcmp(args[0], "queue")) {
242 tv = &proxy->timeout.queue;
243 td = &defpx->timeout.queue;
244 cap = PR_CAP_BE;
Willy Tarreauce887fd2012-05-12 12:50:00 +0200245 } else if (!strcmp(args[0], "tunnel")) {
246 tv = &proxy->timeout.tunnel;
247 td = &defpx->timeout.tunnel;
248 cap = PR_CAP_BE;
Willy Tarreau05cdd962014-05-10 14:30:07 +0200249 } else if (!strcmp(args[0], "client-fin")) {
250 tv = &proxy->timeout.clientfin;
251 td = &defpx->timeout.clientfin;
252 cap = PR_CAP_FE;
253 } else if (!strcmp(args[0], "server-fin")) {
254 tv = &proxy->timeout.serverfin;
255 td = &defpx->timeout.serverfin;
256 cap = PR_CAP_BE;
Tim Duesterhus86e6b6e2019-05-14 20:57:59 +0200257 } else if (!strcmp(args[0], "clitimeout")) {
258 memprintf(err, "the '%s' directive is not supported anymore since HAProxy 2.1. Use 'timeout client'.", args[0]);
259 return -1;
260 } else if (!strcmp(args[0], "srvtimeout")) {
261 memprintf(err, "the '%s' directive is not supported anymore since HAProxy 2.1. Use 'timeout server'.", args[0]);
262 return -1;
263 } else if (!strcmp(args[0], "contimeout")) {
264 memprintf(err, "the '%s' directive is not supported anymore since HAProxy 2.1. Use 'timeout connect'.", args[0]);
265 return -1;
Willy Tarreaue219db72007-12-03 01:30:13 +0100266 } else {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200267 memprintf(err,
268 "'timeout' supports 'client', 'server', 'connect', 'check', "
Willy Tarreau05cdd962014-05-10 14:30:07 +0200269 "'queue', 'http-keep-alive', 'http-request', 'tunnel', 'tarpit', "
270 "'client-fin' and 'server-fin' (got '%s')",
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200271 args[0]);
Willy Tarreaue219db72007-12-03 01:30:13 +0100272 return -1;
273 }
274
275 if (*args[1] == 0) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200276 memprintf(err, "'timeout %s' expects an integer value (in milliseconds)", name);
Willy Tarreaue219db72007-12-03 01:30:13 +0100277 return -1;
278 }
279
280 res = parse_time_err(args[1], &timeout, TIME_UNIT_MS);
Willy Tarreau9faebe32019-06-07 19:00:37 +0200281 if (res == PARSE_TIME_OVER) {
282 memprintf(err, "timer overflow in argument '%s' to 'timeout %s' (maximum value is 2147483647 ms or ~24.8 days)",
283 args[1], name);
284 return -1;
285 }
286 else if (res == PARSE_TIME_UNDER) {
287 memprintf(err, "timer underflow in argument '%s' to 'timeout %s' (minimum non-null value is 1 ms)",
288 args[1], name);
289 return -1;
290 }
291 else if (res) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200292 memprintf(err, "unexpected character '%c' in 'timeout %s'", *res, name);
Willy Tarreaue219db72007-12-03 01:30:13 +0100293 return -1;
294 }
295
296 if (!(proxy->cap & cap)) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200297 memprintf(err, "'timeout %s' will be ignored because %s '%s' has no %s capability",
298 name, proxy_type_str(proxy), proxy->id,
299 (cap & PR_CAP_BE) ? "backend" : "frontend");
Willy Tarreaue219db72007-12-03 01:30:13 +0100300 retval = 1;
301 }
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200302 else if (defpx && *tv != *td) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200303 memprintf(err, "overwriting 'timeout %s' which was already specified", name);
Willy Tarreaue219db72007-12-03 01:30:13 +0100304 retval = 1;
305 }
306
Willy Tarreaufac5b592014-05-22 08:24:46 +0200307 if (*args[2] != 0) {
308 memprintf(err, "'timeout %s' : unexpected extra argument '%s' after value '%s'.", name, args[2], args[1]);
309 retval = -1;
310 }
311
Willy Tarreau0c303ee2008-07-07 00:09:58 +0200312 *tv = MS_TO_TICKS(timeout);
Willy Tarreaue219db72007-12-03 01:30:13 +0100313 return retval;
314}
315
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100316/* This function parses a "rate-limit" statement in a proxy section. It returns
317 * -1 if there is any error, 1 for a warning, otherwise zero. If it does not
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200318 * return zero, it will write an error or warning message into a preallocated
319 * buffer returned at <err>. The function must be called with <args> pointing
320 * to the first command line word, with <proxy> pointing to the proxy being
321 * parsed, and <defpx> to the default proxy or NULL.
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100322 */
323static int proxy_parse_rate_limit(char **args, int section, struct proxy *proxy,
Willy Tarreau28a47d62012-09-18 20:02:48 +0200324 struct proxy *defpx, const char *file, int line,
325 char **err)
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100326{
William Dauchybb9da0b2020-01-16 01:34:27 +0100327 int retval;
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200328 char *res;
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100329 unsigned int *tv = NULL;
330 unsigned int *td = NULL;
331 unsigned int val;
332
333 retval = 0;
334
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200335 if (strcmp(args[1], "sessions") == 0) {
Willy Tarreau13a34bd2009-05-10 18:52:49 +0200336 tv = &proxy->fe_sps_lim;
337 td = &defpx->fe_sps_lim;
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200338 }
339 else {
340 memprintf(err, "'%s' only supports 'sessions' (got '%s')", args[0], args[1]);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100341 return -1;
342 }
343
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200344 if (*args[2] == 0) {
345 memprintf(err, "'%s %s' expects expects an integer value (in sessions/second)", args[0], args[1]);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100346 return -1;
347 }
348
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200349 val = strtoul(args[2], &res, 0);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100350 if (*res) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200351 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 +0100352 return -1;
353 }
354
William Dauchybb9da0b2020-01-16 01:34:27 +0100355 if (!(proxy->cap & PR_CAP_FE)) {
356 memprintf(err, "%s %s will be ignored because %s '%s' has no frontend capability",
357 args[0], args[1], proxy_type_str(proxy), proxy->id);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100358 retval = 1;
359 }
360 else if (defpx && *tv != *td) {
Willy Tarreau0a3dd742012-05-08 19:47:01 +0200361 memprintf(err, "overwriting %s %s which was already specified", args[0], args[1]);
Willy Tarreau3a7d2072009-03-05 23:48:25 +0100362 retval = 1;
363 }
364
365 *tv = val;
366 return retval;
367}
368
Willy Tarreauc35362a2014-04-25 13:58:37 +0200369/* This function parses a "max-keep-alive-queue" statement in a proxy section.
370 * It returns -1 if there is any error, 1 for a warning, otherwise zero. If it
371 * does not return zero, it will write an error or warning message into a
372 * preallocated buffer returned at <err>. The function must be called with
373 * <args> pointing to the first command line word, with <proxy> pointing to
374 * the proxy being parsed, and <defpx> to the default proxy or NULL.
375 */
376static int proxy_parse_max_ka_queue(char **args, int section, struct proxy *proxy,
377 struct proxy *defpx, const char *file, int line,
378 char **err)
379{
380 int retval;
381 char *res;
382 unsigned int val;
383
384 retval = 0;
385
386 if (*args[1] == 0) {
387 memprintf(err, "'%s' expects expects an integer value (or -1 to disable)", args[0]);
388 return -1;
389 }
390
391 val = strtol(args[1], &res, 0);
392 if (*res) {
393 memprintf(err, "'%s' : unexpected character '%c' in integer value '%s'", args[0], *res, args[1]);
394 return -1;
395 }
396
397 if (!(proxy->cap & PR_CAP_BE)) {
398 memprintf(err, "%s will be ignored because %s '%s' has no backend capability",
399 args[0], proxy_type_str(proxy), proxy->id);
400 retval = 1;
401 }
402
403 /* we store <val+1> so that a user-facing value of -1 is stored as zero (default) */
404 proxy->max_ka_queue = val + 1;
405 return retval;
406}
407
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +0200408/* This function parses a "declare" statement in a proxy section. It returns -1
409 * if there is any error, 1 for warning, otherwise 0. If it does not return zero,
410 * it will write an error or warning message into a preallocated buffer returned
411 * at <err>. The function must be called with <args> pointing to the first command
412 * line word, with <proxy> pointing to the proxy being parsed, and <defpx> to the
413 * default proxy or NULL.
414 */
415static int proxy_parse_declare(char **args, int section, struct proxy *curpx,
416 struct proxy *defpx, const char *file, int line,
417 char **err)
418{
419 /* Capture keyword wannot be declared in a default proxy. */
420 if (curpx == defpx) {
Joseph Herlant9edebb82018-11-15 11:50:44 -0800421 memprintf(err, "'%s' not available in default section", args[0]);
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +0200422 return -1;
423 }
424
Joseph Herlant59dd2952018-11-15 11:46:55 -0800425 /* Capture keywork is only available in frontend. */
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +0200426 if (!(curpx->cap & PR_CAP_FE)) {
Joseph Herlant9edebb82018-11-15 11:50:44 -0800427 memprintf(err, "'%s' only available in frontend or listen section", args[0]);
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +0200428 return -1;
429 }
430
431 /* Check mandatory second keyword. */
432 if (!args[1] || !*args[1]) {
433 memprintf(err, "'%s' needs a second keyword that specify the type of declaration ('capture')", args[0]);
434 return -1;
435 }
436
Joseph Herlant59dd2952018-11-15 11:46:55 -0800437 /* Actually, declare is only available for declaring capture
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +0200438 * slot, but in the future it can declare maps or variables.
Joseph Herlant59dd2952018-11-15 11:46:55 -0800439 * So, this section permits to check and switch according with
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +0200440 * the second keyword.
441 */
442 if (strcmp(args[1], "capture") == 0) {
443 char *error = NULL;
444 long len;
445 struct cap_hdr *hdr;
446
447 /* Check the next keyword. */
448 if (!args[2] || !*args[2] ||
449 (strcmp(args[2], "response") != 0 &&
450 strcmp(args[2], "request") != 0)) {
451 memprintf(err, "'%s %s' requires a direction ('request' or 'response')", args[0], args[1]);
452 return -1;
453 }
454
455 /* Check the 'len' keyword. */
456 if (!args[3] || !*args[3] || strcmp(args[3], "len") != 0) {
457 memprintf(err, "'%s %s' requires a capture length ('len')", args[0], args[1]);
458 return -1;
459 }
460
461 /* Check the length value. */
462 if (!args[4] || !*args[4]) {
463 memprintf(err, "'%s %s': 'len' requires a numeric value that represents the "
464 "capture length",
465 args[0], args[1]);
466 return -1;
467 }
468
469 /* convert the length value. */
470 len = strtol(args[4], &error, 10);
471 if (*error != '\0') {
472 memprintf(err, "'%s %s': cannot parse the length '%s'.",
473 args[0], args[1], args[3]);
474 return -1;
475 }
476
477 /* check length. */
478 if (len <= 0) {
479 memprintf(err, "length must be > 0");
480 return -1;
481 }
482
483 /* register the capture. */
Vincent Bernat02779b62016-04-03 13:48:43 +0200484 hdr = calloc(1, sizeof(*hdr));
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +0200485 hdr->name = NULL; /* not a header capture */
486 hdr->namelen = 0;
487 hdr->len = len;
488 hdr->pool = create_pool("caphdr", hdr->len + 1, MEM_F_SHARED);
489
490 if (strcmp(args[2], "request") == 0) {
491 hdr->next = curpx->req_cap;
492 hdr->index = curpx->nb_req_cap++;
493 curpx->req_cap = hdr;
494 }
495 if (strcmp(args[2], "response") == 0) {
496 hdr->next = curpx->rsp_cap;
497 hdr->index = curpx->nb_rsp_cap++;
498 curpx->rsp_cap = hdr;
499 }
500 return 0;
501 }
502 else {
503 memprintf(err, "unknown declaration type '%s' (supports 'capture')", args[1]);
504 return -1;
505 }
506}
507
Olivier Houcharda254a372019-04-05 15:30:12 +0200508/* This function parses a "retry-on" statement */
509static int
510proxy_parse_retry_on(char **args, int section, struct proxy *curpx,
511 struct proxy *defpx, const char *file, int line,
512 char **err)
513{
514 int i;
515
516 if (!(*args[1])) {
517 memprintf(err, "'%s' needs at least one keyword to specify when to retry", args[0]);
518 return -1;
519 }
520 if (!(curpx->cap & PR_CAP_BE)) {
521 memprintf(err, "'%s' only available in backend or listen section", args[0]);
522 return -1;
523 }
524 curpx->retry_type = 0;
525 for (i = 1; *(args[i]); i++) {
526 if (!strcmp(args[i], "conn-failure"))
527 curpx->retry_type |= PR_RE_CONN_FAILED;
528 else if (!strcmp(args[i], "empty-response"))
529 curpx->retry_type |= PR_RE_DISCONNECTED;
530 else if (!strcmp(args[i], "response-timeout"))
531 curpx->retry_type |= PR_RE_TIMEOUT;
532 else if (!strcmp(args[i], "404"))
533 curpx->retry_type |= PR_RE_404;
534 else if (!strcmp(args[i], "408"))
535 curpx->retry_type |= PR_RE_408;
536 else if (!strcmp(args[i], "425"))
537 curpx->retry_type |= PR_RE_425;
538 else if (!strcmp(args[i], "500"))
539 curpx->retry_type |= PR_RE_500;
540 else if (!strcmp(args[i], "501"))
541 curpx->retry_type |= PR_RE_501;
542 else if (!strcmp(args[i], "502"))
543 curpx->retry_type |= PR_RE_502;
544 else if (!strcmp(args[i], "503"))
545 curpx->retry_type |= PR_RE_503;
546 else if (!strcmp(args[i], "504"))
547 curpx->retry_type |= PR_RE_504;
Olivier Houchard865d8392019-05-03 22:46:27 +0200548 else if (!strcmp(args[i], "0rtt-rejected"))
549 curpx->retry_type |= PR_RE_EARLY_ERROR;
Olivier Houcharde3249a92019-05-03 23:01:47 +0200550 else if (!strcmp(args[i], "junk-response"))
551 curpx->retry_type |= PR_RE_JUNK_REQUEST;
Olivier Houchardddf0e032019-05-10 18:05:40 +0200552 else if (!(strcmp(args[i], "all-retryable-errors")))
553 curpx->retry_type |= PR_RE_CONN_FAILED | PR_RE_DISCONNECTED |
554 PR_RE_TIMEOUT | PR_RE_500 | PR_RE_502 |
555 PR_RE_503 | PR_RE_504 | PR_RE_EARLY_ERROR |
556 PR_RE_JUNK_REQUEST;
Olivier Houcharda254a372019-04-05 15:30:12 +0200557 else if (!strcmp(args[i], "none")) {
558 if (i != 1 || *args[i + 1]) {
559 memprintf(err, "'%s' 'none' keyworld only usable alone", args[0]);
560 return -1;
561 }
562 } else {
563 memprintf(err, "'%s': unknown keyword '%s'", args[0], args[i]);
564 return -1;
565 }
566
567 }
568
569
570 return 0;
571}
572
Willy Tarreauf79d9502014-03-15 07:22:35 +0100573/* This function inserts proxy <px> into the tree of known proxies. The proxy's
574 * name is used as the storing key so it must already have been initialized.
575 */
576void proxy_store_name(struct proxy *px)
577{
578 px->conf.by_name.key = px->id;
579 ebis_insert(&proxy_by_name, &px->conf.by_name);
580}
581
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200582/* Returns a pointer to the first proxy matching capabilities <cap> and id
583 * <id>. NULL is returned if no match is found. If <table> is non-zero, it
584 * only considers proxies having a table.
Willy Tarreaubc216c42011-08-02 11:25:54 +0200585 */
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200586struct proxy *proxy_find_by_id(int id, int cap, int table)
Willy Tarreau9e0bb102015-05-26 11:24:42 +0200587{
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200588 struct eb32_node *n;
Willy Tarreaubc216c42011-08-02 11:25:54 +0200589
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200590 for (n = eb32_lookup(&used_proxy_id, id); n; n = eb32_next(n)) {
591 struct proxy *px = container_of(n, struct proxy, conf.id);
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100592
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200593 if (px->uuid != id)
594 break;
Alex Williams96532db2009-11-01 21:27:13 -0500595
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200596 if ((px->cap & cap) != cap)
597 continue;
Alex Williams96532db2009-11-01 21:27:13 -0500598
Frédéric Lécaille1b8e68e2019-03-14 07:07:41 +0100599 if (table && (!px->table || !px->table->size))
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200600 continue;
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100601
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200602 return px;
603 }
604 return NULL;
605}
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100606
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200607/* Returns a pointer to the first proxy matching either name <name>, or id
608 * <name> if <name> begins with a '#'. NULL is returned if no match is found.
609 * If <table> is non-zero, it only considers proxies having a table.
610 */
611struct proxy *proxy_find_by_name(const char *name, int cap, int table)
612{
613 struct proxy *curproxy;
Willy Tarreau9e0bb102015-05-26 11:24:42 +0200614
Willy Tarreau3c56a7d2015-05-26 15:25:32 +0200615 if (*name == '#') {
616 curproxy = proxy_find_by_id(atoi(name + 1), cap, table);
617 if (curproxy)
Willy Tarreauc739aa82015-05-26 11:35:41 +0200618 return curproxy;
Alex Williams96532db2009-11-01 21:27:13 -0500619 }
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100620 else {
621 struct ebpt_node *node;
622
623 for (node = ebis_lookup(&proxy_by_name, name); node; node = ebpt_next(node)) {
624 curproxy = container_of(node, struct proxy, conf.by_name);
Alex Williams96532db2009-11-01 21:27:13 -0500625
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100626 if (strcmp(curproxy->id, name) != 0)
627 break;
628
629 if ((curproxy->cap & cap) != cap)
630 continue;
631
Frédéric Lécaille1b8e68e2019-03-14 07:07:41 +0100632 if (table && (!curproxy->table || !curproxy->table->size))
Willy Tarreau9e0bb102015-05-26 11:24:42 +0200633 continue;
634
Willy Tarreauc739aa82015-05-26 11:35:41 +0200635 return curproxy;
Willy Tarreaucfd837f2014-03-15 07:43:51 +0100636 }
637 }
Willy Tarreauc739aa82015-05-26 11:35:41 +0200638 return NULL;
Alex Williams96532db2009-11-01 21:27:13 -0500639}
640
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200641/* Finds the best match for a proxy with capabilities <cap>, name <name> and id
642 * <id>. At most one of <id> or <name> may be different provided that <cap> is
643 * valid. Either <id> or <name> may be left unspecified (0). The purpose is to
644 * find a proxy based on some information from a previous configuration, across
645 * reloads or during information exchange between peers.
646 *
647 * Names are looked up first if present, then IDs are compared if present. In
648 * case of an inexact match whatever is forced in the configuration has
649 * precedence in the following order :
650 * - 1) forced ID (proves a renaming / change of proxy type)
651 * - 2) proxy name+type (may indicate a move if ID differs)
652 * - 3) automatic ID+type (may indicate a renaming)
653 *
654 * Depending on what is found, we can end up in the following situations :
655 *
656 * name id cap | possible causes
657 * -------------+-----------------
658 * -- -- -- | nothing found
659 * -- -- ok | nothing found
660 * -- ok -- | proxy deleted, ID points to next one
661 * -- ok ok | proxy renamed, or deleted with ID pointing to next one
662 * ok -- -- | proxy deleted, but other half with same name still here (before)
663 * ok -- ok | proxy's ID changed (proxy moved in the config file)
664 * ok ok -- | proxy deleted, but other half with same name still here (after)
665 * ok ok ok | perfect match
666 *
667 * Upon return if <diff> is not NULL, it is zeroed then filled with up to 3 bits :
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200668 * - PR_FBM_MISMATCH_ID : proxy was found but ID differs
669 * (and ID was not zero)
670 * - PR_FBM_MISMATCH_NAME : proxy was found by ID but name differs
671 * (and name was not NULL)
672 * - PR_FBM_MISMATCH_PROXYTYPE : a proxy of different type was found with
673 * the same name and/or id
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200674 *
675 * Only a valid proxy is returned. If capabilities do not match, NULL is
676 * returned. The caller can check <diff> to report detailed warnings / errors,
677 * and decide whether or not to use what was found.
678 */
679struct proxy *proxy_find_best_match(int cap, const char *name, int id, int *diff)
680{
681 struct proxy *byname;
682 struct proxy *byid;
683
684 if (!name && !id)
685 return NULL;
686
687 if (diff)
688 *diff = 0;
689
690 byname = byid = NULL;
691
692 if (name) {
693 byname = proxy_find_by_name(name, cap, 0);
694 if (byname && (!id || byname->uuid == id))
695 return byname;
696 }
697
Joseph Herlant59dd2952018-11-15 11:46:55 -0800698 /* remaining possibilities :
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200699 * - name not set
700 * - name set but not found
701 * - name found, but ID doesn't match.
702 */
703 if (id) {
704 byid = proxy_find_by_id(id, cap, 0);
705 if (byid) {
706 if (byname) {
707 /* id+type found, name+type found, but not all 3.
708 * ID wins only if forced, otherwise name wins.
709 */
710 if (byid->options & PR_O_FORCED_ID) {
711 if (diff)
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200712 *diff |= PR_FBM_MISMATCH_NAME;
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200713 return byid;
714 }
715 else {
716 if (diff)
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200717 *diff |= PR_FBM_MISMATCH_ID;
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200718 return byname;
719 }
720 }
721
Joseph Herlant59dd2952018-11-15 11:46:55 -0800722 /* remaining possibilities :
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200723 * - name not set
724 * - name set but not found
725 */
726 if (name && diff)
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200727 *diff |= PR_FBM_MISMATCH_NAME;
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200728 return byid;
729 }
730
731 /* ID not found */
732 if (byname) {
733 if (diff)
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200734 *diff |= PR_FBM_MISMATCH_ID;
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200735 return byname;
736 }
737 }
738
Joseph Herlant59dd2952018-11-15 11:46:55 -0800739 /* All remaining possibilities will lead to NULL. If we can report more
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200740 * detailed information to the caller about changed types and/or name,
741 * we'll do it. For example, we could detect that "listen foo" was
742 * split into "frontend foo_ft" and "backend foo_bk" if IDs are forced.
743 * - name not set, ID not found
744 * - name not found, ID not set
745 * - name not found, ID not found
746 */
747 if (!diff)
748 return NULL;
749
750 if (name) {
751 byname = proxy_find_by_name(name, 0, 0);
752 if (byname && (!id || byname->uuid == id))
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200753 *diff |= PR_FBM_MISMATCH_PROXYTYPE;
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200754 }
755
756 if (id) {
757 byid = proxy_find_by_id(id, 0, 0);
758 if (byid) {
759 if (!name)
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200760 *diff |= PR_FBM_MISMATCH_PROXYTYPE; /* only type changed */
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200761 else if (byid->options & PR_O_FORCED_ID)
Baptiste Assmann8a027cc2015-07-03 11:03:33 +0200762 *diff |= PR_FBM_MISMATCH_NAME | PR_FBM_MISMATCH_PROXYTYPE; /* name and type changed */
Willy Tarreaueb3e3482015-05-27 16:46:26 +0200763 /* otherwise it's a different proxy that was returned */
764 }
765 }
766 return NULL;
767}
768
Willy Tarreaubaaee002006-06-26 02:48:02 +0200769/*
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100770 * This function finds a server with matching name within selected proxy.
771 * It also checks if there are more matching servers with
772 * requested name as this often leads into unexpected situations.
773 */
774
775struct server *findserver(const struct proxy *px, const char *name) {
776
777 struct server *cursrv, *target = NULL;
778
779 if (!px)
780 return NULL;
781
782 for (cursrv = px->srv; cursrv; cursrv = cursrv->next) {
783 if (strcmp(cursrv->id, name))
784 continue;
785
786 if (!target) {
787 target = cursrv;
788 continue;
789 }
790
Christopher Faulet767a84b2017-11-24 16:50:31 +0100791 ha_alert("Refusing to use duplicated server '%s' found in proxy: %s!\n",
792 name, px->id);
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100793
794 return NULL;
795 }
796
797 return target;
798}
799
Willy Tarreauff01a212009-03-15 13:46:16 +0100800/* This function checks that the designated proxy has no http directives
801 * enabled. It will output a warning if there are, and will fix some of them.
802 * It returns the number of fatal errors encountered. This should be called
803 * at the end of the configuration parsing if the proxy is not in http mode.
804 * The <file> argument is used to construct the error message.
805 */
Willy Tarreau915e1eb2009-06-22 15:48:36 +0200806int proxy_cfg_ensure_no_http(struct proxy *curproxy)
Willy Tarreauff01a212009-03-15 13:46:16 +0100807{
808 if (curproxy->cookie_name != NULL) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100809 ha_warning("config : cookie will be ignored for %s '%s' (needs 'mode http').\n",
810 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100811 }
Willy Tarreauff01a212009-03-15 13:46:16 +0100812 if (curproxy->monitor_uri != NULL) {
Christopher Faulet767a84b2017-11-24 16:50:31 +0100813 ha_warning("config : monitor-uri will be ignored for %s '%s' (needs 'mode http').\n",
814 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100815 }
Willy Tarreauf3e49f92009-10-03 12:21:20 +0200816 if (curproxy->lbprm.algo & BE_LB_NEED_HTTP) {
Willy Tarreauff01a212009-03-15 13:46:16 +0100817 curproxy->lbprm.algo &= ~BE_LB_ALGO;
818 curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Christopher Faulet767a84b2017-11-24 16:50:31 +0100819 ha_warning("config : Layer 7 hash not possible for %s '%s' (needs 'mode http'). Falling back to round robin.\n",
820 proxy_type_str(curproxy), curproxy->id);
Willy Tarreauff01a212009-03-15 13:46:16 +0100821 }
Willy Tarreau17804162009-11-09 21:27:51 +0100822 if (curproxy->to_log & (LW_REQ | LW_RESP)) {
823 curproxy->to_log &= ~(LW_REQ | LW_RESP);
Christopher Faulet767a84b2017-11-24 16:50:31 +0100824 ha_warning("parsing [%s:%d] : HTTP log/header format not usable with %s '%s' (needs 'mode http').\n",
825 curproxy->conf.lfs_file, curproxy->conf.lfs_line,
826 proxy_type_str(curproxy), curproxy->id);
Willy Tarreau17804162009-11-09 21:27:51 +0100827 }
Willy Tarreau62a61232013-04-12 18:13:46 +0200828 if (curproxy->conf.logformat_string == default_http_log_format ||
829 curproxy->conf.logformat_string == clf_http_log_format) {
830 /* Note: we don't change the directive's file:line number */
831 curproxy->conf.logformat_string = default_tcp_log_format;
Christopher Faulet767a84b2017-11-24 16:50:31 +0100832 ha_warning("parsing [%s:%d] : 'option httplog' not usable with %s '%s' (needs 'mode http'). Falling back to 'option tcplog'.\n",
833 curproxy->conf.lfs_file, curproxy->conf.lfs_line,
834 proxy_type_str(curproxy), curproxy->id);
Willy Tarreau196729e2012-05-31 19:30:26 +0200835 }
836
Willy Tarreauff01a212009-03-15 13:46:16 +0100837 return 0;
838}
839
Willy Tarreau237250c2011-07-29 01:49:03 +0200840/* Perform the most basic initialization of a proxy :
841 * memset(), list_init(*), reset_timeouts(*).
Willy Tarreaub249e842011-09-07 18:41:08 +0200842 * Any new proxy or peer should be initialized via this function.
Willy Tarreau237250c2011-07-29 01:49:03 +0200843 */
844void init_new_proxy(struct proxy *p)
845{
846 memset(p, 0, sizeof(struct proxy));
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100847 p->obj_type = OBJ_TYPE_PROXY;
Patrick Hemmer0355dab2018-05-11 12:52:31 -0400848 p->pendconns = EB_ROOT;
Willy Tarreau237250c2011-07-29 01:49:03 +0200849 LIST_INIT(&p->acl);
850 LIST_INIT(&p->http_req_rules);
Willy Tarreaue365c0b2013-06-11 16:06:12 +0200851 LIST_INIT(&p->http_res_rules);
Christopher Faulet6d0c3df2020-01-22 09:26:35 +0100852 LIST_INIT(&p->http_after_res_rules);
Willy Tarreau237250c2011-07-29 01:49:03 +0200853 LIST_INIT(&p->redirect_rules);
854 LIST_INIT(&p->mon_fail_cond);
855 LIST_INIT(&p->switching_rules);
Willy Tarreau4a5cade2012-04-05 21:09:48 +0200856 LIST_INIT(&p->server_rules);
Willy Tarreau237250c2011-07-29 01:49:03 +0200857 LIST_INIT(&p->persist_rules);
858 LIST_INIT(&p->sticking_rules);
859 LIST_INIT(&p->storersp_rules);
860 LIST_INIT(&p->tcp_req.inspect_rules);
861 LIST_INIT(&p->tcp_rep.inspect_rules);
862 LIST_INIT(&p->tcp_req.l4_rules);
Willy Tarreau620408f2016-10-21 16:37:51 +0200863 LIST_INIT(&p->tcp_req.l5_rules);
Olivier Houchard859dc802019-08-08 15:47:21 +0200864 MT_LIST_INIT(&p->listener_queue);
William Lallemand0f99e342011-10-12 17:50:54 +0200865 LIST_INIT(&p->logsrvs);
William Lallemand723b73a2012-02-08 16:37:49 +0100866 LIST_INIT(&p->logformat);
Dragan Dosen0b85ece2015-09-25 19:17:44 +0200867 LIST_INIT(&p->logformat_sd);
William Lallemanda73203e2012-03-12 12:48:57 +0100868 LIST_INIT(&p->format_unique_id);
Willy Tarreau2a65ff02012-09-13 17:54:29 +0200869 LIST_INIT(&p->conf.bind);
Willy Tarreau4348fad2012-09-20 16:48:07 +0200870 LIST_INIT(&p->conf.listeners);
Christopher Faulet76edc0f2020-01-13 15:52:01 +0100871 LIST_INIT(&p->conf.errors);
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200872 LIST_INIT(&p->conf.args.list);
Christopher Faulet443ea1a2016-02-04 13:40:26 +0100873 LIST_INIT(&p->filter_configs);
Christopher Faulet7a1e2e12020-04-02 18:05:11 +0200874 LIST_INIT(&p->tcpcheck_rules.preset_vars);
Willy Tarreau237250c2011-07-29 01:49:03 +0200875
876 /* Timeouts are defined as -1 */
877 proxy_reset_timeouts(p);
878 p->tcp_rep.inspect_delay = TICK_ETERNITY;
Willy Tarreau050536d2012-10-04 08:47:34 +0200879
880 /* initial uuid is unassigned (-1) */
881 p->uuid = -1;
Christopher Fauletff8abcd2017-06-02 15:33:24 +0200882
Olivier Houcharda254a372019-04-05 15:30:12 +0200883 /* Default to only allow L4 retries */
884 p->retry_type = PR_RE_CONN_FAILED;
885
Christopher Faulet2a944ee2017-11-07 10:42:54 +0100886 HA_SPIN_INIT(&p->lock);
Willy Tarreau237250c2011-07-29 01:49:03 +0200887}
888
Krzysztof Piotr Oledzkic8b16fc2008-02-18 01:26:35 +0100889/*
Willy Tarreau2ff76222007-04-09 19:29:56 +0200890 * This function creates all proxy sockets. It should be done very early,
891 * typically before privileges are dropped. The sockets will be registered
892 * but not added to any fd_set, in order not to loose them across the fork().
Willy Tarreau562515c2011-07-25 08:11:52 +0200893 * The proxies also start in READY state because they all have their listeners
Willy Tarreauf3f8c702011-07-25 07:37:28 +0200894 * bound.
Willy Tarreau2ff76222007-04-09 19:29:56 +0200895 *
896 * Its return value is composed from ERR_NONE, ERR_RETRYABLE and ERR_FATAL.
897 * Retryable errors will only be printed if <verbose> is not zero.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200898 */
899int start_proxies(int verbose)
900{
901 struct proxy *curproxy;
902 struct listener *listener;
Willy Tarreaue6b98942007-10-29 01:09:36 +0100903 int lerr, err = ERR_NONE;
904 int pxerr;
905 char msg[100];
Willy Tarreaubaaee002006-06-26 02:48:02 +0200906
Olivier Houchardfbc74e82017-11-24 16:54:05 +0100907 for (curproxy = proxies_list; curproxy != NULL; curproxy = curproxy->next) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200908 if (curproxy->state != PR_STNEW)
909 continue; /* already initialized */
910
911 pxerr = 0;
Willy Tarreau4348fad2012-09-20 16:48:07 +0200912 list_for_each_entry(listener, &curproxy->conf.listeners, by_fe) {
Willy Tarreaue6b98942007-10-29 01:09:36 +0100913 if (listener->state != LI_ASSIGNED)
914 continue; /* already started */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200915
Emeric Bruncf20bf12010-10-22 16:06:11 +0200916 lerr = listener->proto->bind(listener, msg, sizeof(msg));
Willy Tarreaubaaee002006-06-26 02:48:02 +0200917
Willy Tarreaue6b98942007-10-29 01:09:36 +0100918 /* errors are reported if <verbose> is set or if they are fatal */
919 if (verbose || (lerr & (ERR_FATAL | ERR_ABORT))) {
920 if (lerr & ERR_ALERT)
Christopher Faulet767a84b2017-11-24 16:50:31 +0100921 ha_alert("Starting %s %s: %s\n",
922 proxy_type_str(curproxy), curproxy->id, msg);
Willy Tarreaue6b98942007-10-29 01:09:36 +0100923 else if (lerr & ERR_WARN)
Christopher Faulet767a84b2017-11-24 16:50:31 +0100924 ha_warning("Starting %s %s: %s\n",
925 proxy_type_str(curproxy), curproxy->id, msg);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200926 }
927
Willy Tarreaue6b98942007-10-29 01:09:36 +0100928 err |= lerr;
929 if (lerr & (ERR_ABORT | ERR_FATAL)) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200930 pxerr |= 1;
Willy Tarreaue6b98942007-10-29 01:09:36 +0100931 break;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200932 }
Willy Tarreaue6b98942007-10-29 01:09:36 +0100933 else if (lerr & ERR_CODE) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200934 pxerr |= 1;
935 continue;
936 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200937 }
938
939 if (!pxerr) {
Willy Tarreau562515c2011-07-25 08:11:52 +0200940 curproxy->state = PR_STREADY;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200941 send_log(curproxy, LOG_NOTICE, "Proxy %s started.\n", curproxy->id);
942 }
Willy Tarreaue6b98942007-10-29 01:09:36 +0100943
944 if (err & ERR_ABORT)
945 break;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200946 }
947
948 return err;
949}
950
951
952/*
Willy Tarreau918ff602011-07-25 16:33:49 +0200953 * This is the proxy management task. It enables proxies when there are enough
Willy Tarreau87b09662015-04-03 00:22:06 +0200954 * free streams, or stops them when the table is full. It is designed to be
Willy Tarreau918ff602011-07-25 16:33:49 +0200955 * called as a task which is woken up upon stopping or when rate limiting must
956 * be enforced.
Willy Tarreaubaaee002006-06-26 02:48:02 +0200957 */
Olivier Houchard9f6af332018-05-25 14:04:04 +0200958struct task *manage_proxy(struct task *t, void *context, unsigned short state)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200959{
Olivier Houchard9f6af332018-05-25 14:04:04 +0200960 struct proxy *p = context;
Willy Tarreau918ff602011-07-25 16:33:49 +0200961 int next = TICK_ETERNITY;
Willy Tarreau79584222009-03-06 09:18:27 +0100962 unsigned int wait;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200963
Willy Tarreau918ff602011-07-25 16:33:49 +0200964 /* We should periodically try to enable listeners waiting for a
965 * global resource here.
966 */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200967
Willy Tarreau918ff602011-07-25 16:33:49 +0200968 /* first, let's check if we need to stop the proxy */
969 if (unlikely(stopping && p->state != PR_STSTOPPED)) {
970 int t;
971 t = tick_remain(now_ms, p->stop_time);
972 if (t == 0) {
William Dauchy1e2256d2020-01-25 23:45:18 +0100973 ha_warning("Proxy %s stopped (cumulated conns: FE: %lld, BE: %lld).\n",
Christopher Faulet767a84b2017-11-24 16:50:31 +0100974 p->id, p->fe_counters.cum_conn, p->be_counters.cum_conn);
William Dauchy1e2256d2020-01-25 23:45:18 +0100975 send_log(p, LOG_WARNING, "Proxy %s stopped (cumulated conns: FE: %lld, BE: %lld).\n",
Willy Tarreau918ff602011-07-25 16:33:49 +0200976 p->id, p->fe_counters.cum_conn, p->be_counters.cum_conn);
977 stop_proxy(p);
978 /* try to free more memory */
Willy Tarreaubafbe012017-11-24 17:34:44 +0100979 pool_gc(NULL);
Willy Tarreau918ff602011-07-25 16:33:49 +0200980 }
981 else {
982 next = tick_first(next, p->stop_time);
983 }
984 }
Willy Tarreauf3f8c702011-07-25 07:37:28 +0200985
Willy Tarreau3a925c12013-09-04 17:54:01 +0200986 /* If the proxy holds a stick table, we need to purge all unused
987 * entries. These are all the ones in the table with ref_cnt == 0
988 * and all the ones in the pool used to allocate new entries. Any
Willy Tarreau87b09662015-04-03 00:22:06 +0200989 * entry attached to an existing stream waiting for a store will
Willy Tarreau3a925c12013-09-04 17:54:01 +0200990 * be in neither list. Any entry being dumped will have ref_cnt > 0.
991 * However we protect tables that are being synced to peers.
992 */
Frédéric Lécaille1b8e68e2019-03-14 07:07:41 +0100993 if (unlikely(stopping && p->state == PR_STSTOPPED && p->table && p->table->current)) {
994 if (!p->table->syncing) {
995 stktable_trash_oldest(p->table, p->table->current);
Willy Tarreaubafbe012017-11-24 17:34:44 +0100996 pool_gc(NULL);
Willy Tarreau3a925c12013-09-04 17:54:01 +0200997 }
Frédéric Lécaille1b8e68e2019-03-14 07:07:41 +0100998 if (p->table->current) {
Willy Tarreau3a925c12013-09-04 17:54:01 +0200999 /* some entries still remain, let's recheck in one second */
1000 next = tick_first(next, tick_add(now_ms, 1000));
1001 }
1002 }
1003
Willy Tarreau918ff602011-07-25 16:33:49 +02001004 /* the rest below is just for frontends */
1005 if (!(p->cap & PR_CAP_FE))
1006 goto out;
Willy Tarreauf3f8c702011-07-25 07:37:28 +02001007
Willy Tarreau918ff602011-07-25 16:33:49 +02001008 /* check the various reasons we may find to block the frontend */
1009 if (unlikely(p->feconn >= p->maxconn)) {
1010 if (p->state == PR_STREADY)
1011 p->state = PR_STFULL;
1012 goto out;
1013 }
Willy Tarreau3a7d2072009-03-05 23:48:25 +01001014
Willy Tarreau918ff602011-07-25 16:33:49 +02001015 /* OK we have no reason to block, so let's unblock if we were blocking */
1016 if (p->state == PR_STFULL)
1017 p->state = PR_STREADY;
Willy Tarreau3a7d2072009-03-05 23:48:25 +01001018
Willy Tarreau918ff602011-07-25 16:33:49 +02001019 if (p->fe_sps_lim &&
1020 (wait = next_event_delay(&p->fe_sess_per_sec, p->fe_sps_lim, 0))) {
1021 /* we're blocking because a limit was reached on the number of
1022 * requests/s on the frontend. We want to re-check ASAP, which
1023 * means in 1 ms before estimated expiration date, because the
1024 * timer will have settled down.
1025 */
1026 next = tick_first(next, tick_add(now_ms, wait));
1027 goto out;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001028 }
Willy Tarreau918ff602011-07-25 16:33:49 +02001029
1030 /* The proxy is not limited so we can re-enable any waiting listener */
Willy Tarreau241797a2019-12-10 14:10:52 +01001031 dequeue_proxy_listeners(p);
Willy Tarreau918ff602011-07-25 16:33:49 +02001032 out:
1033 t->expire = next;
1034 task_queue(t);
1035 return t;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001036}
1037
1038
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001039static int proxy_parse_hard_stop_after(char **args, int section_type, struct proxy *curpx,
1040 struct proxy *defpx, const char *file, int line,
1041 char **err)
1042{
1043 const char *res;
1044
1045 if (!*args[1]) {
1046 memprintf(err, "'%s' expects <time> as argument.\n", args[0]);
1047 return -1;
1048 }
1049 res = parse_time_err(args[1], &global.hard_stop_after, TIME_UNIT_MS);
Willy Tarreau9faebe32019-06-07 19:00:37 +02001050 if (res == PARSE_TIME_OVER) {
1051 memprintf(err, "timer overflow in argument '%s' to '%s' (maximum value is 2147483647 ms or ~24.8 days)",
1052 args[1], args[0]);
1053 return -1;
1054 }
1055 else if (res == PARSE_TIME_UNDER) {
1056 memprintf(err, "timer underflow in argument '%s' to '%s' (minimum non-null value is 1 ms)",
1057 args[1], args[0]);
1058 return -1;
1059 }
1060 else if (res) {
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001061 memprintf(err, "unexpected character '%c' in argument to <%s>.\n", *res, args[0]);
1062 return -1;
1063 }
1064 return 0;
1065}
1066
Olivier Houchard9f6af332018-05-25 14:04:04 +02001067struct task *hard_stop(struct task *t, void *context, unsigned short state)
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001068{
1069 struct proxy *p;
1070 struct stream *s;
1071
1072 if (killed) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001073 ha_warning("Some tasks resisted to hard-stop, exiting now.\n");
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001074 send_log(NULL, LOG_WARNING, "Some tasks resisted to hard-stop, exiting now.\n");
Willy Tarreau7067b3a2019-06-02 11:11:29 +02001075 killed = 2;
1076 t->expire = TICK_ETERNITY;
1077 return t;
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001078 }
1079
Christopher Faulet767a84b2017-11-24 16:50:31 +01001080 ha_warning("soft-stop running for too long, performing a hard-stop.\n");
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001081 send_log(NULL, LOG_WARNING, "soft-stop running for too long, performing a hard-stop.\n");
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001082 p = proxies_list;
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001083 while (p) {
1084 if ((p->cap & PR_CAP_FE) && (p->feconn > 0)) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001085 ha_warning("Proxy %s hard-stopped (%d remaining conns will be closed).\n",
1086 p->id, p->feconn);
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001087 send_log(p, LOG_WARNING, "Proxy %s hard-stopped (%d remaining conns will be closed).\n",
1088 p->id, p->feconn);
1089 }
1090 p = p->next;
1091 }
1092 list_for_each_entry(s, &streams, list) {
1093 stream_shutdown(s, SF_ERR_KILLED);
1094 }
1095
1096 killed = 1;
1097 t->expire = tick_add(now_ms, MS_TO_TICKS(1000));
1098 return t;
1099}
1100
Willy Tarreaubaaee002006-06-26 02:48:02 +02001101/*
1102 * this function disables health-check servers so that the process will quickly be ignored
1103 * by load balancers. Note that if a proxy was already in the PAUSED state, then its grace
1104 * time will not be used since it would already not listen anymore to the socket.
1105 */
1106void soft_stop(void)
1107{
1108 struct proxy *p;
Willy Tarreaubbe11b12011-07-25 11:16:24 +02001109 struct peers *prs;
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001110 struct task *task;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001111
1112 stopping = 1;
William Dauchy3894d972019-12-28 15:36:02 +01001113 /* disable busy polling to avoid cpu eating for the new process */
1114 global.tune.options &= ~GTUNE_BUSY_POLLING;
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001115 if (tick_isset(global.hard_stop_after)) {
Emeric Brunc60def82017-09-27 14:59:38 +02001116 task = task_new(MAX_THREADS_MASK);
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001117 if (task) {
1118 task->process = hard_stop;
1119 task_schedule(task, tick_add(now_ms, global.hard_stop_after));
1120 }
1121 else {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001122 ha_alert("out of memory trying to allocate the hard-stop task.\n");
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001123 }
1124 }
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001125 p = proxies_list;
Willy Tarreaub0b37bc2008-06-23 14:00:57 +02001126 tv_update_date(0,1); /* else, the old time before select will be used */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001127 while (p) {
Olivier Houchard1fc05162017-04-06 01:05:05 +02001128 /* Zombie proxy, let's close the file descriptors */
1129 if (p->state == PR_STSTOPPED &&
1130 !LIST_ISEMPTY(&p->conf.listeners) &&
1131 LIST_ELEM(p->conf.listeners.n,
Willy Tarreau67878d72019-12-10 07:11:35 +01001132 struct listener *, by_fe)->state > LI_ASSIGNED) {
Olivier Houchard1fc05162017-04-06 01:05:05 +02001133 struct listener *l;
1134 list_for_each_entry(l, &p->conf.listeners, by_fe) {
Willy Tarreau67878d72019-12-10 07:11:35 +01001135 if (l->state > LI_ASSIGNED)
Olivier Houchard1fc05162017-04-06 01:05:05 +02001136 close(l->fd);
1137 l->state = LI_INIT;
1138 }
1139 }
1140
Willy Tarreaubaaee002006-06-26 02:48:02 +02001141 if (p->state != PR_STSTOPPED) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001142 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 +02001143 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 +02001144 p->stop_time = tick_add(now_ms, p->grace);
Emeric Brun5a8c0a92010-09-23 18:44:36 +02001145
Willy Tarreau20b7afb2015-09-28 16:35:04 +02001146 /* Note: do not wake up stopped proxies' task nor their tables'
1147 * tasks as these ones might point to already released entries.
1148 */
Frédéric Lécaille1b8e68e2019-03-14 07:07:41 +01001149 if (p->table && p->table->size && p->table->sync_task)
1150 task_wakeup(p->table->sync_task, TASK_WOKEN_MSG);
Willy Tarreau20b7afb2015-09-28 16:35:04 +02001151
1152 if (p->task)
1153 task_wakeup(p->task, TASK_WOKEN_MSG);
1154 }
Willy Tarreaubaaee002006-06-26 02:48:02 +02001155 p = p->next;
1156 }
Willy Tarreaubbe11b12011-07-25 11:16:24 +02001157
Frédéric Lécailleed2b4a62017-07-13 09:07:09 +02001158 prs = cfg_peers;
Willy Tarreaubbe11b12011-07-25 11:16:24 +02001159 while (prs) {
Willy Tarreau337a6662015-09-28 16:27:44 +02001160 if (prs->peers_fe)
1161 stop_proxy(prs->peers_fe);
Willy Tarreaubbe11b12011-07-25 11:16:24 +02001162 prs = prs->next;
1163 }
Willy Tarreaud0807c32010-08-27 18:26:11 +02001164 /* signal zero is used to broadcast the "stopping" event */
1165 signal_handler(0);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001166}
1167
1168
Willy Tarreaube58c382011-07-24 18:28:10 +02001169/* Temporarily disables listening on all of the proxy's listeners. Upon
1170 * success, the proxy enters the PR_PAUSED state. If disabling at least one
1171 * listener returns an error, then the proxy state is set to PR_STERROR
Willy Tarreauce8fe252011-09-07 19:14:57 +02001172 * because we don't know how to resume from this. The function returns 0
1173 * if it fails, or non-zero on success.
Willy Tarreaubaaee002006-06-26 02:48:02 +02001174 */
Willy Tarreauce8fe252011-09-07 19:14:57 +02001175int pause_proxy(struct proxy *p)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001176{
1177 struct listener *l;
Willy Tarreauce8fe252011-09-07 19:14:57 +02001178
1179 if (!(p->cap & PR_CAP_FE) || p->state == PR_STERROR ||
1180 p->state == PR_STSTOPPED || p->state == PR_STPAUSED)
1181 return 1;
1182
Christopher Faulet767a84b2017-11-24 16:50:31 +01001183 ha_warning("Pausing %s %s.\n", proxy_cap_str(p->cap), p->id);
Willy Tarreauce8fe252011-09-07 19:14:57 +02001184 send_log(p, LOG_WARNING, "Pausing %s %s.\n", proxy_cap_str(p->cap), p->id);
1185
Willy Tarreau4348fad2012-09-20 16:48:07 +02001186 list_for_each_entry(l, &p->conf.listeners, by_fe) {
Willy Tarreaube58c382011-07-24 18:28:10 +02001187 if (!pause_listener(l))
Willy Tarreaubaaee002006-06-26 02:48:02 +02001188 p->state = PR_STERROR;
1189 }
Willy Tarreauce8fe252011-09-07 19:14:57 +02001190
1191 if (p->state == PR_STERROR) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001192 ha_warning("%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id);
Willy Tarreauce8fe252011-09-07 19:14:57 +02001193 send_log(p, LOG_WARNING, "%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id);
1194 return 0;
1195 }
1196
1197 p->state = PR_STPAUSED;
1198 return 1;
Willy Tarreauda250db2008-10-12 12:07:48 +02001199}
1200
Olivier Houchard1fc05162017-04-06 01:05:05 +02001201/* This function makes the proxy unusable, but keeps the listening sockets
1202 * opened, so that if any process requests them, we are able to serve them.
1203 * This should only be called early, before we started accepting requests.
1204 */
1205void zombify_proxy(struct proxy *p)
1206{
1207 struct listener *l;
1208 struct listener *first_to_listen = NULL;
1209
1210 list_for_each_entry(l, &p->conf.listeners, by_fe) {
1211 enum li_state oldstate = l->state;
1212
1213 unbind_listener_no_close(l);
1214 if (l->state >= LI_ASSIGNED) {
1215 delete_listener(l);
Olivier Houchard1fc05162017-04-06 01:05:05 +02001216 }
1217 /*
1218 * Pretend we're still up and running so that the fd
1219 * will be sent if asked.
1220 */
1221 l->state = LI_ZOMBIE;
1222 if (!first_to_listen && oldstate >= LI_LISTEN)
1223 first_to_listen = l;
1224 }
1225 /* Quick hack : at stop time, to know we have to close the sockets
1226 * despite the proxy being marked as stopped, make the first listener
1227 * of the listener list an active one, so that we don't have to
1228 * parse the whole list to be sure.
1229 */
1230 if (first_to_listen && LIST_ELEM(p->conf.listeners.n,
1231 struct listener *, by_fe) != first_to_listen) {
1232 LIST_DEL(&l->by_fe);
1233 LIST_ADD(&p->conf.listeners, &l->by_fe);
1234 }
1235
1236 p->state = PR_STSTOPPED;
1237}
Willy Tarreauda250db2008-10-12 12:07:48 +02001238
1239/*
1240 * This function completely stops a proxy and releases its listeners. It has
1241 * to be called when going down in order to release the ports so that another
1242 * process may bind to them. It must also be called on disabled proxies at the
William Lallemandc59f9882018-11-16 16:57:21 +01001243 * end of start-up. If all listeners are closed, the proxy is set to the
Willy Tarreau3de3cd42019-07-24 17:42:44 +02001244 * PR_STSTOPPED state. The function takes the proxy's lock so it's safe to
1245 * call from multiple places.
Willy Tarreauda250db2008-10-12 12:07:48 +02001246 */
1247void stop_proxy(struct proxy *p)
1248{
1249 struct listener *l;
William Lallemandc59f9882018-11-16 16:57:21 +01001250 int nostop = 0;
Willy Tarreauda250db2008-10-12 12:07:48 +02001251
Willy Tarreau3de3cd42019-07-24 17:42:44 +02001252 HA_SPIN_LOCK(PROXY_LOCK, &p->lock);
1253
Willy Tarreau4348fad2012-09-20 16:48:07 +02001254 list_for_each_entry(l, &p->conf.listeners, by_fe) {
William Lallemandc59f9882018-11-16 16:57:21 +01001255 if (l->options & LI_O_NOSTOP) {
1256 HA_ATOMIC_ADD(&unstoppable_jobs, 1);
1257 nostop = 1;
1258 continue;
1259 }
William Lallemandf7f488d2019-10-18 21:16:39 +02001260 /* The master should not close an inherited FD */
1261 if (master && (l->options & LI_O_INHERITED))
1262 unbind_listener_no_close(l);
1263 else
1264 unbind_listener(l);
Willy Tarreauda250db2008-10-12 12:07:48 +02001265 if (l->state >= LI_ASSIGNED) {
1266 delete_listener(l);
Willy Tarreauda250db2008-10-12 12:07:48 +02001267 }
1268 }
William Lallemandc59f9882018-11-16 16:57:21 +01001269 if (!nostop)
1270 p->state = PR_STSTOPPED;
Willy Tarreau3de3cd42019-07-24 17:42:44 +02001271
1272 HA_SPIN_UNLOCK(PROXY_LOCK, &p->lock);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001273}
1274
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001275/* This function resumes listening on the specified proxy. It scans all of its
1276 * listeners and tries to enable them all. If any of them fails, the proxy is
1277 * put back to the paused state. It returns 1 upon success, or zero if an error
1278 * is encountered.
1279 */
1280int resume_proxy(struct proxy *p)
1281{
1282 struct listener *l;
1283 int fail;
1284
1285 if (p->state != PR_STPAUSED)
1286 return 1;
1287
Christopher Faulet767a84b2017-11-24 16:50:31 +01001288 ha_warning("Enabling %s %s.\n", proxy_cap_str(p->cap), p->id);
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001289 send_log(p, LOG_WARNING, "Enabling %s %s.\n", proxy_cap_str(p->cap), p->id);
1290
1291 fail = 0;
Willy Tarreau4348fad2012-09-20 16:48:07 +02001292 list_for_each_entry(l, &p->conf.listeners, by_fe) {
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001293 if (!resume_listener(l)) {
1294 int port;
1295
1296 port = get_host_port(&l->addr);
1297 if (port) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001298 ha_warning("Port %d busy while trying to enable %s %s.\n",
1299 port, proxy_cap_str(p->cap), p->id);
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001300 send_log(p, LOG_WARNING, "Port %d busy while trying to enable %s %s.\n",
1301 port, proxy_cap_str(p->cap), p->id);
1302 }
1303 else {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001304 ha_warning("Bind on socket %d busy while trying to enable %s %s.\n",
1305 l->luid, proxy_cap_str(p->cap), p->id);
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001306 send_log(p, LOG_WARNING, "Bind on socket %d busy while trying to enable %s %s.\n",
1307 l->luid, proxy_cap_str(p->cap), p->id);
1308 }
1309
1310 /* Another port might have been enabled. Let's stop everything. */
1311 fail = 1;
1312 break;
1313 }
1314 }
1315
1316 p->state = PR_STREADY;
1317 if (fail) {
1318 pause_proxy(p);
1319 return 0;
1320 }
1321 return 1;
1322}
1323
Willy Tarreaubaaee002006-06-26 02:48:02 +02001324/*
1325 * This function temporarily disables listening so that another new instance
1326 * can start listening. It is designed to be called upon reception of a
1327 * SIGTTOU, after which either a SIGUSR1 can be sent to completely stop
1328 * the proxy, or a SIGTTIN can be sent to listen again.
1329 */
1330void pause_proxies(void)
1331{
1332 int err;
1333 struct proxy *p;
Emeric Brun5a8c0a92010-09-23 18:44:36 +02001334 struct peers *prs;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001335
1336 err = 0;
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001337 p = proxies_list;
Willy Tarreaub0b37bc2008-06-23 14:00:57 +02001338 tv_update_date(0,1); /* else, the old time before select will be used */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001339 while (p) {
Willy Tarreauce8fe252011-09-07 19:14:57 +02001340 err |= !pause_proxy(p);
Willy Tarreaubaaee002006-06-26 02:48:02 +02001341 p = p->next;
1342 }
Emeric Brun5a8c0a92010-09-23 18:44:36 +02001343
Frédéric Lécailleed2b4a62017-07-13 09:07:09 +02001344 prs = cfg_peers;
Emeric Brun5a8c0a92010-09-23 18:44:36 +02001345 while (prs) {
Willy Tarreau337a6662015-09-28 16:27:44 +02001346 if (prs->peers_fe)
1347 err |= !pause_proxy(prs->peers_fe);
Willy Tarreauce8fe252011-09-07 19:14:57 +02001348 prs = prs->next;
Emeric Brun5a8c0a92010-09-23 18:44:36 +02001349 }
1350
Willy Tarreaubaaee002006-06-26 02:48:02 +02001351 if (err) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001352 ha_warning("Some proxies refused to pause, performing soft stop now.\n");
Willy Tarreaubaaee002006-06-26 02:48:02 +02001353 send_log(p, LOG_WARNING, "Some proxies refused to pause, performing soft stop now.\n");
1354 soft_stop();
1355 }
1356}
1357
1358
1359/*
1360 * This function reactivates listening. This can be used after a call to
1361 * sig_pause(), for example when a new instance has failed starting up.
1362 * It is designed to be called upon reception of a SIGTTIN.
1363 */
Willy Tarreaube58c382011-07-24 18:28:10 +02001364void resume_proxies(void)
Willy Tarreaubaaee002006-06-26 02:48:02 +02001365{
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001366 int err;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001367 struct proxy *p;
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001368 struct peers *prs;
Willy Tarreaubaaee002006-06-26 02:48:02 +02001369
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001370 err = 0;
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001371 p = proxies_list;
Willy Tarreaub0b37bc2008-06-23 14:00:57 +02001372 tv_update_date(0,1); /* else, the old time before select will be used */
Willy Tarreaubaaee002006-06-26 02:48:02 +02001373 while (p) {
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001374 err |= !resume_proxy(p);
1375 p = p->next;
1376 }
Willy Tarreaubaaee002006-06-26 02:48:02 +02001377
Frédéric Lécailleed2b4a62017-07-13 09:07:09 +02001378 prs = cfg_peers;
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001379 while (prs) {
Willy Tarreau337a6662015-09-28 16:27:44 +02001380 if (prs->peers_fe)
1381 err |= !resume_proxy(prs->peers_fe);
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001382 prs = prs->next;
1383 }
Willy Tarreaube58c382011-07-24 18:28:10 +02001384
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001385 if (err) {
Christopher Faulet767a84b2017-11-24 16:50:31 +01001386 ha_warning("Some proxies refused to resume, a restart is probably needed to resume safe operations.\n");
Willy Tarreauc03ebbf2011-09-07 21:33:14 +02001387 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 +02001388 }
1389}
1390
Willy Tarreau87b09662015-04-03 00:22:06 +02001391/* Set current stream's backend to <be>. Nothing is done if the
1392 * stream already had a backend assigned, which is indicated by
Willy Tarreaue7dff022015-04-03 01:14:29 +02001393 * s->flags & SF_BE_ASSIGNED.
Willy Tarreau1d0dfb12009-07-07 15:10:31 +02001394 * All flags, stats and counters which need be updated are updated.
Willy Tarreaubedb9ba2009-07-12 08:27:39 +02001395 * Returns 1 if done, 0 in case of internal error, eg: lack of resource.
Willy Tarreau1d0dfb12009-07-07 15:10:31 +02001396 */
Willy Tarreau87b09662015-04-03 00:22:06 +02001397int stream_set_backend(struct stream *s, struct proxy *be)
Willy Tarreau1d0dfb12009-07-07 15:10:31 +02001398{
Willy Tarreaue7dff022015-04-03 01:14:29 +02001399 if (s->flags & SF_BE_ASSIGNED)
Willy Tarreaubedb9ba2009-07-12 08:27:39 +02001400 return 1;
Christopher Faulet41179042016-06-21 11:54:52 +02001401
1402 if (flt_set_stream_backend(s, be) < 0)
1403 return 0;
1404
Willy Tarreau1d0dfb12009-07-07 15:10:31 +02001405 s->be = be;
Christopher Fauletff8abcd2017-06-02 15:33:24 +02001406 HA_ATOMIC_UPDATE_MAX(&be->be_counters.conn_max,
1407 HA_ATOMIC_ADD(&be->beconn, 1));
Willy Tarreau1d0dfb12009-07-07 15:10:31 +02001408 proxy_inc_be_ctr(be);
1409
Willy Tarreau87b09662015-04-03 00:22:06 +02001410 /* assign new parameters to the stream from the new backend */
Willy Tarreauf27b5ea2009-10-03 22:01:18 +02001411 s->si[1].flags &= ~SI_FL_INDEP_STR;
1412 if (be->options2 & PR_O2_INDEPSTR)
1413 s->si[1].flags |= SI_FL_INDEP_STR;
1414
Hongbo Longe39683c2017-03-10 18:41:51 +01001415 if (tick_isset(be->timeout.serverfin))
1416 s->si[1].hcto = be->timeout.serverfin;
1417
Willy Tarreau9fbe18e2015-05-01 22:42:08 +02001418 /* We want to enable the backend-specific analysers except those which
1419 * were already run as part of the frontend/listener. Note that it would
1420 * be more reliable to store the list of analysers that have been run,
1421 * but what we do here is OK for now.
1422 */
Christopher Faulet70e2f272017-01-09 16:33:19 +01001423 s->req.analysers |= be->be_req_ana & ~(strm_li(s) ? strm_li(s)->analysers : 0);
Willy Tarreau9fbe18e2015-05-01 22:42:08 +02001424
Willy Tarreau51aecc72009-07-12 09:47:04 +02001425 /* If the target backend requires HTTP processing, we have to allocate
Christopher Faulet711ed6a2019-07-16 14:16:10 +02001426 * the HTTP transaction if we did not have one.
Willy Tarreau51aecc72009-07-12 09:47:04 +02001427 */
Willy Tarreaueee5b512015-04-03 23:46:31 +02001428 if (unlikely(!s->txn && be->http_needed)) {
1429 if (unlikely(!http_alloc_txn(s)))
Willy Tarreau51aecc72009-07-12 09:47:04 +02001430 return 0; /* not enough memory */
Willy Tarreau39e4f622010-05-31 17:01:36 +02001431
1432 /* and now initialize the HTTP transaction state */
1433 http_init_txn(s);
Willy Tarreau51aecc72009-07-12 09:47:04 +02001434 }
1435
Christopher Faulet309c6412015-12-02 09:57:32 +01001436 /* Be sure to filter request headers if the backend is an HTTP proxy and
1437 * if there are filters attached to the stream. */
1438 if (s->be->mode == PR_MODE_HTTP && HAS_FILTERS(s))
Christopher Faulet0184ea72017-01-05 14:06:34 +01001439 s->req.analysers |= AN_REQ_FLT_HTTP_HDRS;
Christopher Faulet309c6412015-12-02 09:57:32 +01001440
Willy Tarreaueee5b512015-04-03 23:46:31 +02001441 if (s->txn) {
Christopher Fauletbbe68542019-04-08 10:53:51 +02001442 /* If we chain a TCP frontend to an HTX backend, we must upgrade
1443 * the client mux */
Christopher Faulet60d29b32019-07-15 15:00:25 +02001444 if (!IS_HTX_STRM(s) && be->mode == PR_MODE_HTTP) {
Christopher Fauletbbe68542019-04-08 10:53:51 +02001445 struct connection *conn = objt_conn(strm_sess(s)->origin);
1446 struct conn_stream *cs = objt_cs(s->si[0].end);
1447
1448 if (conn && cs) {
1449 si_rx_endp_more(&s->si[0]);
Olivier Houchard2ab3dad2019-07-03 13:08:18 +02001450 /* Make sure we're unsubscribed, the the new
1451 * mux will probably want to subscribe to
1452 * the underlying XPRT
1453 */
1454 if (s->si[0].wait_event.events)
1455 conn->mux->unsubscribe(cs, s->si[0].wait_event.events,
1456 &s->si[0].wait_event);
Christopher Fauletc985f6c2019-07-15 11:42:52 +02001457 if (conn_upgrade_mux_fe(conn, cs, &s->req.buf, ist(""), PROTO_MODE_HTTP) == -1)
Christopher Fauletbbe68542019-04-08 10:53:51 +02001458 return 0;
Olivier Houchard4c18f942019-07-31 18:05:26 +02001459 if (!strcmp(conn->mux->name, "H2")) {
1460 /* For HTTP/2, destroy the conn_stream,
1461 * disable logging, and pretend that we
1462 * failed, to that the stream is
1463 * silently destroyed. The new mux
1464 * will create new streams.
1465 */
Olivier Houchard59dd06d2019-08-09 18:01:15 +02001466 cs_free(cs);
Olivier Houchard4c18f942019-07-31 18:05:26 +02001467 si_detach_endpoint(&s->si[0]);
1468 s->logs.logwait = 0;
1469 s->logs.level = 0;
1470 s->flags |= SF_IGNORE;
1471 return 0;
1472 }
Olivier Houchard71b20c22019-08-09 17:50:05 +02001473 s->flags |= SF_HTX;
Christopher Fauletbbe68542019-04-08 10:53:51 +02001474 }
1475 }
Christopher Fauleteec7f8a2019-12-20 15:59:20 +01001476 else if (IS_HTX_STRM(s) && be->mode != PR_MODE_HTTP) {
1477 /* If a TCP backend is assgiend to an HTX stream, return
1478 * an error. It may happens for a new stream on a
1479 * previously upgraded connnections. */
1480 if (!(s->flags & SF_ERR_MASK))
1481 s->flags |= SF_ERR_INTERNAL;
1482 return 0;
1483 }
Christopher Fauletbbe68542019-04-08 10:53:51 +02001484
Willy Tarreau9fbe18e2015-05-01 22:42:08 +02001485 /* we may request to parse a request body */
Christopher Faulet711ed6a2019-07-16 14:16:10 +02001486 if (be->options & PR_O_WREQ_BODY)
Willy Tarreau9fbe18e2015-05-01 22:42:08 +02001487 s->req.analysers |= AN_REQ_HTTP_BODY;
Willy Tarreaueee5b512015-04-03 23:46:31 +02001488 }
1489
1490 s->flags |= SF_BE_ASSIGNED;
Willy Tarreau96e31212011-05-30 18:10:30 +02001491 if (be->options2 & PR_O2_NODELAY) {
Willy Tarreau22ec1ea2014-11-27 20:45:39 +01001492 s->req.flags |= CF_NEVER_WAIT;
1493 s->res.flags |= CF_NEVER_WAIT;
Willy Tarreau96e31212011-05-30 18:10:30 +02001494 }
1495
Willy Tarreaubedb9ba2009-07-12 08:27:39 +02001496 return 1;
Willy Tarreau1d0dfb12009-07-07 15:10:31 +02001497}
1498
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001499/* Capture a bad request or response and archive it in the proxy's structure.
1500 * It is relatively protocol-agnostic so it requires that a number of elements
1501 * are passed :
1502 * - <proxy> is the proxy where the error was detected and where the snapshot
1503 * needs to be stored
Joseph Herlant59dd2952018-11-15 11:46:55 -08001504 * - <is_back> indicates that the error happened when receiving the response
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001505 * - <other_end> is a pointer to the proxy on the other side when known
1506 * - <target> is the target of the connection, usually a server or a proxy
1507 * - <sess> is the session which experienced the error
1508 * - <ctx> may be NULL or should contain any info relevant to the protocol
1509 * - <buf> is the buffer containing the offending data
1510 * - <buf_ofs> is the position of this buffer's input data in the input
1511 * stream, starting at zero. It may be passed as zero if unknown.
1512 * - <buf_out> is the portion of <buf->data> which was already forwarded and
1513 * which precedes the buffer's input. The buffer's input starts at
1514 * buf->head + buf_out.
1515 * - <err_pos> is the pointer to the faulty byte in the buffer's input.
1516 * - <show> is the callback to use to display <ctx>. It may be NULL.
1517 */
1518void proxy_capture_error(struct proxy *proxy, int is_back,
1519 struct proxy *other_end, enum obj_type *target,
1520 const struct session *sess,
1521 const struct buffer *buf, long buf_ofs,
1522 unsigned int buf_out, unsigned int err_pos,
1523 const union error_snapshot_ctx *ctx,
1524 void (*show)(struct buffer *, const struct error_snapshot *))
1525{
1526 struct error_snapshot *es;
1527 unsigned int buf_len;
1528 int len1, len2;
Willy Tarreauc55015e2018-09-07 19:02:32 +02001529 unsigned int ev_id;
1530
1531 ev_id = HA_ATOMIC_XADD(&error_snapshot_id, 1);
1532
Willy Tarreau4bc7d902018-09-07 20:07:17 +02001533 buf_len = b_data(buf) - buf_out;
1534
1535 es = malloc(sizeof(*es) + buf_len);
Willy Tarreauc55015e2018-09-07 19:02:32 +02001536 if (!es)
1537 return;
1538
Willy Tarreau4bc7d902018-09-07 20:07:17 +02001539 es->buf_len = buf_len;
1540 es->ev_id = ev_id;
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001541
Christopher Faulet47a72102020-01-06 11:37:00 +01001542 len1 = b_size(buf) - b_peek_ofs(buf, buf_out);
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001543 if (len1 > buf_len)
1544 len1 = buf_len;
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001545
Willy Tarreau4bc7d902018-09-07 20:07:17 +02001546 if (len1) {
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001547 memcpy(es->buf, b_peek(buf, buf_out), len1);
Willy Tarreau4bc7d902018-09-07 20:07:17 +02001548 len2 = buf_len - len1;
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001549 if (len2)
1550 memcpy(es->buf + len1, b_orig(buf), len2);
1551 }
1552
1553 es->buf_err = err_pos;
1554 es->when = date; // user-visible date
1555 es->srv = objt_server(target);
1556 es->oe = other_end;
Olivier Houchardbdb00c52020-03-12 15:30:17 +01001557 if (sess && objt_conn(sess->origin) && conn_get_src(__objt_conn(sess->origin)))
Willy Tarreau026efc72019-07-17 15:20:02 +02001558 es->src = *__objt_conn(sess->origin)->src;
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001559 else
1560 memset(&es->src, 0, sizeof(es->src));
1561
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001562 es->buf_wrap = b_wrap(buf) - b_peek(buf, buf_out);
1563 es->buf_out = buf_out;
1564 es->buf_ofs = buf_ofs;
1565
1566 /* be sure to indicate the offset of the first IN byte */
1567 if (es->buf_ofs >= es->buf_len)
1568 es->buf_ofs -= es->buf_len;
1569 else
1570 es->buf_ofs = 0;
1571
1572 /* protocol-specific part now */
1573 if (ctx)
1574 es->ctx = *ctx;
1575 else
1576 memset(&es->ctx, 0, sizeof(es->ctx));
1577 es->show = show;
Willy Tarreauc55015e2018-09-07 19:02:32 +02001578
1579 /* note: we still lock since we have to be certain that nobody is
1580 * dumping the output while we free.
1581 */
1582 HA_SPIN_LOCK(PROXY_LOCK, &proxy->lock);
1583 if (is_back) {
1584 es = HA_ATOMIC_XCHG(&proxy->invalid_rep, es);
1585 } else {
1586 es = HA_ATOMIC_XCHG(&proxy->invalid_req, es);
1587 }
1588 free(es);
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001589 HA_SPIN_UNLOCK(PROXY_LOCK, &proxy->lock);
1590}
1591
Willy Tarreauc8d5b952019-02-27 17:25:52 +01001592/* Configure all proxies which lack a maxconn setting to use the global one by
1593 * default. This avoids the common mistake consisting in setting maxconn only
1594 * in the global section and discovering the hard way that it doesn't propagate
1595 * through the frontends. These values are also propagated through the various
1596 * targetted backends, whose fullconn is finally calculated if not yet set.
1597 */
1598void proxy_adjust_all_maxconn()
1599{
1600 struct proxy *curproxy;
1601 struct switching_rule *swrule1, *swrule2;
1602
1603 for (curproxy = proxies_list; curproxy; curproxy = curproxy->next) {
1604 if (curproxy->state == PR_STSTOPPED)
1605 continue;
1606
1607 if (!(curproxy->cap & PR_CAP_FE))
1608 continue;
1609
1610 if (!curproxy->maxconn)
1611 curproxy->maxconn = global.maxconn;
1612
1613 /* update the target backend's fullconn count : default_backend */
1614 if (curproxy->defbe.be)
1615 curproxy->defbe.be->tot_fe_maxconn += curproxy->maxconn;
1616 else if ((curproxy->cap & PR_CAP_LISTEN) == PR_CAP_LISTEN)
1617 curproxy->tot_fe_maxconn += curproxy->maxconn;
1618
1619 list_for_each_entry(swrule1, &curproxy->switching_rules, list) {
1620 /* For each target of switching rules, we update their
1621 * tot_fe_maxconn, except if a previous rule points to
1622 * the same backend or to the default backend.
1623 */
1624 if (swrule1->be.backend != curproxy->defbe.be) {
Frédéric Lécaille2365fb02019-03-07 15:02:52 +01001625 /* note: swrule1->be.backend isn't a backend if the rule
1626 * is dynamic, it's an expression instead, so it must not
1627 * be dereferenced as a backend before being certain it is.
1628 */
Willy Tarreauc8d5b952019-02-27 17:25:52 +01001629 list_for_each_entry(swrule2, &curproxy->switching_rules, list) {
1630 if (swrule2 == swrule1) {
Frédéric Lécaille2365fb02019-03-07 15:02:52 +01001631 if (!swrule1->dynamic)
1632 swrule1->be.backend->tot_fe_maxconn += curproxy->maxconn;
Willy Tarreauc8d5b952019-02-27 17:25:52 +01001633 break;
1634 }
1635 else if (!swrule2->dynamic && swrule2->be.backend == swrule1->be.backend) {
1636 /* there are multiple refs of this backend */
1637 break;
1638 }
1639 }
1640 }
1641 }
1642 }
1643
1644 /* automatically compute fullconn if not set. We must not do it in the
1645 * loop above because cross-references are not yet fully resolved.
1646 */
1647 for (curproxy = proxies_list; curproxy; curproxy = curproxy->next) {
1648 if (curproxy->state == PR_STSTOPPED)
1649 continue;
1650
1651 /* If <fullconn> is not set, let's set it to 10% of the sum of
1652 * the possible incoming frontend's maxconns.
1653 */
1654 if (!curproxy->fullconn && (curproxy->cap & PR_CAP_BE)) {
1655 /* we have the sum of the maxconns in <total>. We only
1656 * keep 10% of that sum to set the default fullconn, with
1657 * a hard minimum of 1 (to avoid a divide by zero).
1658 */
1659 curproxy->fullconn = (curproxy->tot_fe_maxconn + 9) / 10;
1660 if (!curproxy->fullconn)
1661 curproxy->fullconn = 1;
1662 }
1663 }
1664}
1665
Willy Tarreau75fb65a2018-09-07 17:43:26 +02001666/* Config keywords below */
1667
Willy Tarreaudc13c112013-06-21 23:16:39 +02001668static struct cfg_kw_list cfg_kws = {ILH, {
Cyril Bonté203ec5a2017-03-23 22:44:13 +01001669 { CFG_GLOBAL, "hard-stop-after", proxy_parse_hard_stop_after },
Willy Tarreau9de1bbd2008-07-09 20:34:27 +02001670 { CFG_LISTEN, "timeout", proxy_parse_timeout },
Tim Duesterhus86e6b6e2019-05-14 20:57:59 +02001671 { CFG_LISTEN, "clitimeout", proxy_parse_timeout }, /* This keyword actually fails to parse, this line remains for better error messages. */
1672 { CFG_LISTEN, "contimeout", proxy_parse_timeout }, /* This keyword actually fails to parse, this line remains for better error messages. */
1673 { 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 +01001674 { CFG_LISTEN, "rate-limit", proxy_parse_rate_limit },
Willy Tarreauc35362a2014-04-25 13:58:37 +02001675 { CFG_LISTEN, "max-keep-alive-queue", proxy_parse_max_ka_queue },
Thierry FOURNIERa0a1b752015-05-26 17:44:32 +02001676 { CFG_LISTEN, "declare", proxy_parse_declare },
Olivier Houcharda254a372019-04-05 15:30:12 +02001677 { CFG_LISTEN, "retry-on", proxy_parse_retry_on },
Willy Tarreau9de1bbd2008-07-09 20:34:27 +02001678 { 0, NULL, NULL },
1679}};
1680
Willy Tarreau0108d902018-11-25 19:14:37 +01001681INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);
1682
Willy Tarreau960f2cb2016-11-24 12:02:29 +01001683/* Expects to find a frontend named <arg> and returns it, otherwise displays various
1684 * adequate error messages and returns NULL. This function is designed to be used by
1685 * functions requiring a frontend on the CLI.
1686 */
1687struct proxy *cli_find_frontend(struct appctx *appctx, const char *arg)
1688{
1689 struct proxy *px;
1690
1691 if (!*arg) {
Willy Tarreau9d008692019-08-09 11:21:01 +02001692 cli_err(appctx, "A frontend name is expected.\n");
Willy Tarreau960f2cb2016-11-24 12:02:29 +01001693 return NULL;
1694 }
1695
1696 px = proxy_fe_by_name(arg);
1697 if (!px) {
Willy Tarreau9d008692019-08-09 11:21:01 +02001698 cli_err(appctx, "No such frontend.\n");
Willy Tarreau960f2cb2016-11-24 12:02:29 +01001699 return NULL;
1700 }
1701 return px;
1702}
1703
Olivier Houchard614f8d72017-03-14 20:08:46 +01001704/* Expects to find a backend named <arg> and returns it, otherwise displays various
1705 * adequate error messages and returns NULL. This function is designed to be used by
1706 * functions requiring a frontend on the CLI.
1707 */
1708struct proxy *cli_find_backend(struct appctx *appctx, const char *arg)
1709{
1710 struct proxy *px;
1711
1712 if (!*arg) {
Willy Tarreau9d008692019-08-09 11:21:01 +02001713 cli_err(appctx, "A backend name is expected.\n");
Olivier Houchard614f8d72017-03-14 20:08:46 +01001714 return NULL;
1715 }
1716
1717 px = proxy_be_by_name(arg);
1718 if (!px) {
Willy Tarreau9d008692019-08-09 11:21:01 +02001719 cli_err(appctx, "No such backend.\n");
Olivier Houchard614f8d72017-03-14 20:08:46 +01001720 return NULL;
1721 }
1722 return px;
1723}
1724
1725
William Lallemanda6c5f332016-11-19 02:25:36 +01001726/* parse a "show servers" CLI line, returns 0 if it wants to start the dump or
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001727 * 1 if it stops immediately. If an argument is specified, it will set the proxy
1728 * pointer into cli.p0 and its ID into cli.i0.
William Lallemanda6c5f332016-11-19 02:25:36 +01001729 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02001730static int cli_parse_show_servers(char **args, char *payload, struct appctx *appctx, void *private)
William Lallemanda6c5f332016-11-19 02:25:36 +01001731{
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001732 struct proxy *px;
William Lallemanda6c5f332016-11-19 02:25:36 +01001733
1734 /* check if a backend name has been provided */
1735 if (*args[3]) {
1736 /* read server state from local file */
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001737 px = proxy_be_by_name(args[3]);
William Lallemanda6c5f332016-11-19 02:25:36 +01001738
Willy Tarreau9d008692019-08-09 11:21:01 +02001739 if (!px)
1740 return cli_err(appctx, "Can't find backend.\n");
1741
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001742 appctx->ctx.cli.p0 = px;
1743 appctx->ctx.cli.i0 = px->uuid;
William Lallemanda6c5f332016-11-19 02:25:36 +01001744 }
1745 return 0;
1746}
1747
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001748/* dumps server state information into <buf> for all the servers found in backend cli.p0.
William Lallemanda6c5f332016-11-19 02:25:36 +01001749 * These information are all the parameters which may change during HAProxy runtime.
1750 * By default, we only export to the last known server state file format.
1751 * These information can be used at next startup to recover same level of server state.
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001752 * It uses the proxy pointer from cli.p0, the proxy's id from cli.i0 and the server's
1753 * pointer from cli.p1.
William Lallemanda6c5f332016-11-19 02:25:36 +01001754 */
Willy Tarreau83061a82018-07-13 11:56:34 +02001755static int dump_servers_state(struct stream_interface *si, struct buffer *buf)
William Lallemanda6c5f332016-11-19 02:25:36 +01001756{
1757 struct appctx *appctx = __objt_appctx(si->end);
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001758 struct proxy *px = appctx->ctx.cli.p0;
William Lallemanda6c5f332016-11-19 02:25:36 +01001759 struct server *srv;
1760 char srv_addr[INET6_ADDRSTRLEN + 1];
1761 time_t srv_time_since_last_change;
1762 int bk_f_forced_id, srv_f_forced_id;
Baptiste Assmann6d0f38f2018-07-02 17:00:54 +02001763 char *srvrecord;
William Lallemanda6c5f332016-11-19 02:25:36 +01001764
William Lallemanda6c5f332016-11-19 02:25:36 +01001765 /* we don't want to report any state if the backend is not enabled on this process */
Willy Tarreau6daac192019-02-02 17:39:53 +01001766 if (!(proc_mask(px->bind_proc) & pid_bit))
William Lallemanda6c5f332016-11-19 02:25:36 +01001767 return 1;
1768
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001769 if (!appctx->ctx.cli.p1)
1770 appctx->ctx.cli.p1 = px->srv;
William Lallemanda6c5f332016-11-19 02:25:36 +01001771
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001772 for (; appctx->ctx.cli.p1 != NULL; appctx->ctx.cli.p1 = srv->next) {
1773 srv = appctx->ctx.cli.p1;
William Lallemanda6c5f332016-11-19 02:25:36 +01001774 srv_addr[0] = '\0';
1775
1776 switch (srv->addr.ss_family) {
1777 case AF_INET:
1778 inet_ntop(srv->addr.ss_family, &((struct sockaddr_in *)&srv->addr)->sin_addr,
1779 srv_addr, INET_ADDRSTRLEN + 1);
1780 break;
1781 case AF_INET6:
1782 inet_ntop(srv->addr.ss_family, &((struct sockaddr_in6 *)&srv->addr)->sin6_addr,
1783 srv_addr, INET6_ADDRSTRLEN + 1);
1784 break;
Daniel Corbett9215ffa2018-05-19 19:43:24 -04001785 default:
1786 memcpy(srv_addr, "-\0", 2);
1787 break;
William Lallemanda6c5f332016-11-19 02:25:36 +01001788 }
1789 srv_time_since_last_change = now.tv_sec - srv->last_change;
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001790 bk_f_forced_id = px->options & PR_O_FORCED_ID ? 1 : 0;
William Lallemanda6c5f332016-11-19 02:25:36 +01001791 srv_f_forced_id = srv->flags & SRV_F_FORCED_ID ? 1 : 0;
1792
Baptiste Assmann6d0f38f2018-07-02 17:00:54 +02001793 srvrecord = NULL;
1794 if (srv->srvrq && srv->srvrq->name)
1795 srvrecord = srv->srvrq->name;
1796
William Lallemanda6c5f332016-11-19 02:25:36 +01001797 chunk_appendf(buf,
1798 "%d %s "
1799 "%d %s %s "
1800 "%d %d %d %d %ld "
1801 "%d %d %d %d %d "
Baptiste Assmann6d0f38f2018-07-02 17:00:54 +02001802 "%d %d %s %u %s"
William Lallemanda6c5f332016-11-19 02:25:36 +01001803 "\n",
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001804 px->uuid, px->id,
William Lallemanda6c5f332016-11-19 02:25:36 +01001805 srv->puid, srv->id, srv_addr,
Emeric Brun52a91d32017-08-31 14:41:55 +02001806 srv->cur_state, srv->cur_admin, srv->uweight, srv->iweight, (long int)srv_time_since_last_change,
William Lallemanda6c5f332016-11-19 02:25:36 +01001807 srv->check.status, srv->check.result, srv->check.health, srv->check.state, srv->agent.state,
Baptiste Assmann6d0f38f2018-07-02 17:00:54 +02001808 bk_f_forced_id, srv_f_forced_id, srv->hostname ? srv->hostname : "-", srv->svc_port,
1809 srvrecord ? srvrecord : "-");
Willy Tarreau06d80a92017-10-19 14:32:15 +02001810 if (ci_putchk(si_ic(si), &trash) == -1) {
Willy Tarreaudb398432018-11-15 11:08:52 +01001811 si_rx_room_blk(si);
William Lallemanda6c5f332016-11-19 02:25:36 +01001812 return 0;
1813 }
1814 }
1815 return 1;
1816}
1817
1818/* Parses backend list or simply use backend name provided by the user to return
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001819 * states of servers to stdout. It dumps proxy <cli.p0> and stops if <cli.i0> is
1820 * non-null.
William Lallemanda6c5f332016-11-19 02:25:36 +01001821 */
1822static int cli_io_handler_servers_state(struct appctx *appctx)
1823{
1824 struct stream_interface *si = appctx->owner;
William Lallemanda6c5f332016-11-19 02:25:36 +01001825 struct proxy *curproxy;
1826
1827 chunk_reset(&trash);
1828
1829 if (appctx->st2 == STAT_ST_INIT) {
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001830 if (!appctx->ctx.cli.p0)
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001831 appctx->ctx.cli.p0 = proxies_list;
William Lallemanda6c5f332016-11-19 02:25:36 +01001832 appctx->st2 = STAT_ST_HEAD;
1833 }
1834
1835 if (appctx->st2 == STAT_ST_HEAD) {
1836 chunk_printf(&trash, "%d\n# %s\n", SRV_STATE_FILE_VERSION, SRV_STATE_FILE_FIELD_NAMES);
Willy Tarreau06d80a92017-10-19 14:32:15 +02001837 if (ci_putchk(si_ic(si), &trash) == -1) {
Willy Tarreaudb398432018-11-15 11:08:52 +01001838 si_rx_room_blk(si);
William Lallemanda6c5f332016-11-19 02:25:36 +01001839 return 0;
1840 }
1841 appctx->st2 = STAT_ST_INFO;
1842 }
1843
1844 /* STAT_ST_INFO */
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001845 for (; appctx->ctx.cli.p0 != NULL; appctx->ctx.cli.p0 = curproxy->next) {
1846 curproxy = appctx->ctx.cli.p0;
William Lallemanda6c5f332016-11-19 02:25:36 +01001847 /* servers are only in backends */
1848 if (curproxy->cap & PR_CAP_BE) {
1849 if (!dump_servers_state(si, &trash))
1850 return 0;
William Lallemanda6c5f332016-11-19 02:25:36 +01001851 }
1852 /* only the selected proxy is dumped */
Willy Tarreau3c92f2a2016-12-16 18:23:39 +01001853 if (appctx->ctx.cli.i0)
William Lallemanda6c5f332016-11-19 02:25:36 +01001854 break;
1855 }
1856
1857 return 1;
1858}
1859
Willy Tarreau608ea592016-12-16 18:01:15 +01001860/* Parses backend list and simply report backend names. It keeps the proxy
1861 * pointer in cli.p0.
1862 */
William Lallemand933efcd2016-11-22 12:34:16 +01001863static int cli_io_handler_show_backend(struct appctx *appctx)
1864{
William Lallemand933efcd2016-11-22 12:34:16 +01001865 struct stream_interface *si = appctx->owner;
1866 struct proxy *curproxy;
1867
1868 chunk_reset(&trash);
1869
Willy Tarreau608ea592016-12-16 18:01:15 +01001870 if (!appctx->ctx.cli.p0) {
William Lallemand933efcd2016-11-22 12:34:16 +01001871 chunk_printf(&trash, "# name\n");
Willy Tarreau06d80a92017-10-19 14:32:15 +02001872 if (ci_putchk(si_ic(si), &trash) == -1) {
Willy Tarreaudb398432018-11-15 11:08:52 +01001873 si_rx_room_blk(si);
William Lallemand933efcd2016-11-22 12:34:16 +01001874 return 0;
1875 }
Olivier Houchardfbc74e82017-11-24 16:54:05 +01001876 appctx->ctx.cli.p0 = proxies_list;
William Lallemand933efcd2016-11-22 12:34:16 +01001877 }
1878
Willy Tarreau608ea592016-12-16 18:01:15 +01001879 for (; appctx->ctx.cli.p0 != NULL; appctx->ctx.cli.p0 = curproxy->next) {
1880 curproxy = appctx->ctx.cli.p0;
William Lallemand933efcd2016-11-22 12:34:16 +01001881
1882 /* looking for backends only */
1883 if (!(curproxy->cap & PR_CAP_BE))
1884 continue;
1885
1886 /* we don't want to list a backend which is bound to this process */
Willy Tarreau6daac192019-02-02 17:39:53 +01001887 if (!(proc_mask(curproxy->bind_proc) & pid_bit))
William Lallemand933efcd2016-11-22 12:34:16 +01001888 continue;
1889
1890 chunk_appendf(&trash, "%s\n", curproxy->id);
Willy Tarreau06d80a92017-10-19 14:32:15 +02001891 if (ci_putchk(si_ic(si), &trash) == -1) {
Willy Tarreaudb398432018-11-15 11:08:52 +01001892 si_rx_room_blk(si);
William Lallemand933efcd2016-11-22 12:34:16 +01001893 return 0;
1894 }
1895 }
1896
1897 return 1;
1898}
William Lallemanda6c5f332016-11-19 02:25:36 +01001899
Willy Tarreaua275a372018-08-21 14:50:44 +02001900/* Parses the "enable dynamic-cookies backend" directive, it always returns 1.
1901 *
1902 * Grabs the proxy lock and each server's lock.
1903 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02001904static int cli_parse_enable_dyncookie_backend(char **args, char *payload, struct appctx *appctx, void *private)
Olivier Houchard614f8d72017-03-14 20:08:46 +01001905{
1906 struct proxy *px;
1907 struct server *s;
1908
1909 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
1910 return 1;
1911
1912 px = cli_find_backend(appctx, args[3]);
1913 if (!px)
1914 return 1;
1915
Willy Tarreau5e83d992019-07-30 11:59:34 +02001916 /* Note: this lock is to make sure this doesn't change while another
1917 * thread is in srv_set_dyncookie().
1918 */
Willy Tarreaua275a372018-08-21 14:50:44 +02001919 HA_SPIN_LOCK(PROXY_LOCK, &px->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01001920 px->ck_opts |= PR_CK_DYNAMIC;
Willy Tarreau5e83d992019-07-30 11:59:34 +02001921 HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01001922
Willy Tarreaua275a372018-08-21 14:50:44 +02001923 for (s = px->srv; s != NULL; s = s->next) {
1924 HA_SPIN_LOCK(SERVER_LOCK, &s->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01001925 srv_set_dyncookie(s);
Willy Tarreaua275a372018-08-21 14:50:44 +02001926 HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);
1927 }
1928
Olivier Houchard614f8d72017-03-14 20:08:46 +01001929 return 1;
1930}
1931
Willy Tarreaua275a372018-08-21 14:50:44 +02001932/* Parses the "disable dynamic-cookies backend" directive, it always returns 1.
1933 *
1934 * Grabs the proxy lock and each server's lock.
1935 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02001936static int cli_parse_disable_dyncookie_backend(char **args, char *payload, struct appctx *appctx, void *private)
Olivier Houchard614f8d72017-03-14 20:08:46 +01001937{
1938 struct proxy *px;
1939 struct server *s;
1940
1941 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
1942 return 1;
1943
1944 px = cli_find_backend(appctx, args[3]);
1945 if (!px)
1946 return 1;
1947
Willy Tarreau5e83d992019-07-30 11:59:34 +02001948 /* Note: this lock is to make sure this doesn't change while another
1949 * thread is in srv_set_dyncookie().
1950 */
Willy Tarreaua275a372018-08-21 14:50:44 +02001951 HA_SPIN_LOCK(PROXY_LOCK, &px->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01001952 px->ck_opts &= ~PR_CK_DYNAMIC;
Willy Tarreau5e83d992019-07-30 11:59:34 +02001953 HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01001954
1955 for (s = px->srv; s != NULL; s = s->next) {
Willy Tarreaua275a372018-08-21 14:50:44 +02001956 HA_SPIN_LOCK(SERVER_LOCK, &s->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01001957 if (!(s->flags & SRV_F_COOKIESET)) {
1958 free(s->cookie);
1959 s->cookie = NULL;
1960 }
Willy Tarreaua275a372018-08-21 14:50:44 +02001961 HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01001962 }
1963
1964 return 1;
1965}
1966
Willy Tarreaua275a372018-08-21 14:50:44 +02001967/* Parses the "set dynamic-cookie-key backend" directive, it always returns 1.
1968 *
1969 * Grabs the proxy lock and each server's lock.
1970 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02001971static int cli_parse_set_dyncookie_key_backend(char **args, char *payload, struct appctx *appctx, void *private)
Olivier Houchard614f8d72017-03-14 20:08:46 +01001972{
1973 struct proxy *px;
1974 struct server *s;
1975 char *newkey;
1976
1977 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
1978 return 1;
1979
1980 px = cli_find_backend(appctx, args[3]);
1981 if (!px)
1982 return 1;
1983
Willy Tarreau9d008692019-08-09 11:21:01 +02001984 if (!*args[4])
1985 return cli_err(appctx, "String value expected.\n");
Olivier Houchard614f8d72017-03-14 20:08:46 +01001986
1987 newkey = strdup(args[4]);
Willy Tarreau9d008692019-08-09 11:21:01 +02001988 if (!newkey)
1989 return cli_err(appctx, "Failed to allocate memory.\n");
Willy Tarreaua275a372018-08-21 14:50:44 +02001990
Willy Tarreau5e83d992019-07-30 11:59:34 +02001991 /* Note: this lock is to make sure this doesn't change while another
1992 * thread is in srv_set_dyncookie().
1993 */
Willy Tarreaua275a372018-08-21 14:50:44 +02001994 HA_SPIN_LOCK(PROXY_LOCK, &px->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01001995 free(px->dyncookie_key);
1996 px->dyncookie_key = newkey;
Willy Tarreau5e83d992019-07-30 11:59:34 +02001997 HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01001998
Willy Tarreaua275a372018-08-21 14:50:44 +02001999 for (s = px->srv; s != NULL; s = s->next) {
2000 HA_SPIN_LOCK(SERVER_LOCK, &s->lock);
Olivier Houchard614f8d72017-03-14 20:08:46 +01002001 srv_set_dyncookie(s);
Willy Tarreaua275a372018-08-21 14:50:44 +02002002 HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);
2003 }
2004
Olivier Houchard614f8d72017-03-14 20:08:46 +01002005 return 1;
2006}
2007
Willy Tarreaua275a372018-08-21 14:50:44 +02002008/* Parses the "set maxconn frontend" directive, it always returns 1.
2009 *
2010 * Grabs the proxy lock.
2011 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02002012static int cli_parse_set_maxconn_frontend(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreauc429a1f2016-11-23 16:22:04 +01002013{
2014 struct proxy *px;
2015 struct listener *l;
2016 int v;
2017
2018 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
2019 return 1;
2020
2021 px = cli_find_frontend(appctx, args[3]);
2022 if (!px)
2023 return 1;
2024
Willy Tarreau9d008692019-08-09 11:21:01 +02002025 if (!*args[4])
2026 return cli_err(appctx, "Integer value expected.\n");
Willy Tarreauc429a1f2016-11-23 16:22:04 +01002027
2028 v = atoi(args[4]);
Willy Tarreau9d008692019-08-09 11:21:01 +02002029 if (v < 0)
2030 return cli_err(appctx, "Value out of range.\n");
Willy Tarreauc429a1f2016-11-23 16:22:04 +01002031
2032 /* OK, the value is fine, so we assign it to the proxy and to all of
2033 * its listeners. The blocked ones will be dequeued.
2034 */
Willy Tarreaua275a372018-08-21 14:50:44 +02002035 HA_SPIN_LOCK(PROXY_LOCK, &px->lock);
2036
Willy Tarreauc429a1f2016-11-23 16:22:04 +01002037 px->maxconn = v;
2038 list_for_each_entry(l, &px->conf.listeners, by_fe) {
Willy Tarreauc429a1f2016-11-23 16:22:04 +01002039 if (l->state == LI_FULL)
2040 resume_listener(l);
2041 }
2042
Willy Tarreau241797a2019-12-10 14:10:52 +01002043 if (px->maxconn > px->feconn)
2044 dequeue_proxy_listeners(px);
Willy Tarreauc429a1f2016-11-23 16:22:04 +01002045
Willy Tarreaua275a372018-08-21 14:50:44 +02002046 HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock);
2047
Willy Tarreauc429a1f2016-11-23 16:22:04 +01002048 return 1;
2049}
2050
Willy Tarreaua275a372018-08-21 14:50:44 +02002051/* Parses the "shutdown frontend" directive, it always returns 1.
2052 *
2053 * Grabs the proxy lock.
2054 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02002055static int cli_parse_shutdown_frontend(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreau5212d7f2016-11-24 11:13:06 +01002056{
2057 struct proxy *px;
2058
2059 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
2060 return 1;
2061
2062 px = cli_find_frontend(appctx, args[2]);
2063 if (!px)
2064 return 1;
2065
Willy Tarreau9d008692019-08-09 11:21:01 +02002066 if (px->state == PR_STSTOPPED)
2067 return cli_msg(appctx, LOG_NOTICE, "Frontend was already shut down.\n");
Willy Tarreau5212d7f2016-11-24 11:13:06 +01002068
William Dauchy1e2256d2020-01-25 23:45:18 +01002069 ha_warning("Proxy %s stopped (cumulated conns: FE: %lld, BE: %lld).\n",
Christopher Faulet767a84b2017-11-24 16:50:31 +01002070 px->id, px->fe_counters.cum_conn, px->be_counters.cum_conn);
William Dauchy1e2256d2020-01-25 23:45:18 +01002071 send_log(px, LOG_WARNING, "Proxy %s stopped (cumulated conns: FE: %lld, BE: %lld).\n",
Willy Tarreau5212d7f2016-11-24 11:13:06 +01002072 px->id, px->fe_counters.cum_conn, px->be_counters.cum_conn);
Willy Tarreaua275a372018-08-21 14:50:44 +02002073
Willy Tarreau5212d7f2016-11-24 11:13:06 +01002074 stop_proxy(px);
2075 return 1;
2076}
2077
Willy Tarreaua275a372018-08-21 14:50:44 +02002078/* Parses the "disable frontend" directive, it always returns 1.
2079 *
2080 * Grabs the proxy lock.
2081 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02002082static int cli_parse_disable_frontend(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreau15b9e682016-11-24 11:55:28 +01002083{
2084 struct proxy *px;
Willy Tarreaua275a372018-08-21 14:50:44 +02002085 int ret;
Willy Tarreau15b9e682016-11-24 11:55:28 +01002086
2087 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
2088 return 1;
2089
2090 px = cli_find_frontend(appctx, args[2]);
2091 if (!px)
2092 return 1;
2093
Willy Tarreau9d008692019-08-09 11:21:01 +02002094 if (px->state == PR_STSTOPPED)
2095 return cli_msg(appctx, LOG_NOTICE, "Frontend was previously shut down, cannot disable.\n");
Willy Tarreau15b9e682016-11-24 11:55:28 +01002096
Willy Tarreau9d008692019-08-09 11:21:01 +02002097 if (px->state == PR_STPAUSED)
2098 return cli_msg(appctx, LOG_NOTICE, "Frontend is already disabled.\n");
Willy Tarreau15b9e682016-11-24 11:55:28 +01002099
Willy Tarreaua275a372018-08-21 14:50:44 +02002100 HA_SPIN_LOCK(PROXY_LOCK, &px->lock);
2101 ret = pause_proxy(px);
2102 HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock);
2103
Willy Tarreau9d008692019-08-09 11:21:01 +02002104 if (!ret)
2105 return cli_err(appctx, "Failed to pause frontend, check logs for precise cause.\n");
2106
Willy Tarreau15b9e682016-11-24 11:55:28 +01002107 return 1;
2108}
2109
Willy Tarreaua275a372018-08-21 14:50:44 +02002110/* Parses the "enable frontend" directive, it always returns 1.
2111 *
2112 * Grabs the proxy lock.
2113 */
Aurélien Nephtaliabbf6072018-04-18 13:26:46 +02002114static int cli_parse_enable_frontend(char **args, char *payload, struct appctx *appctx, void *private)
Willy Tarreau15b9e682016-11-24 11:55:28 +01002115{
2116 struct proxy *px;
Willy Tarreaua275a372018-08-21 14:50:44 +02002117 int ret;
Willy Tarreau15b9e682016-11-24 11:55:28 +01002118
2119 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
2120 return 1;
2121
2122 px = cli_find_frontend(appctx, args[2]);
2123 if (!px)
2124 return 1;
2125
Willy Tarreau9d008692019-08-09 11:21:01 +02002126 if (px->state == PR_STSTOPPED)
2127 return cli_err(appctx, "Frontend was previously shut down, cannot enable.\n");
Willy Tarreau15b9e682016-11-24 11:55:28 +01002128
Willy Tarreau9d008692019-08-09 11:21:01 +02002129 if (px->state != PR_STPAUSED)
2130 return cli_msg(appctx, LOG_NOTICE, "Frontend is already enabled.\n");
Willy Tarreau15b9e682016-11-24 11:55:28 +01002131
Willy Tarreaua275a372018-08-21 14:50:44 +02002132 HA_SPIN_LOCK(PROXY_LOCK, &px->lock);
2133 ret = resume_proxy(px);
2134 HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock);
2135
Willy Tarreau9d008692019-08-09 11:21:01 +02002136 if (!ret)
2137 return cli_err(appctx, "Failed to resume frontend, check logs for precise cause (port conflict?).\n");
Willy Tarreau15b9e682016-11-24 11:55:28 +01002138 return 1;
2139}
2140
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002141/* "show errors" handler for the CLI. Returns 0 if wants to continue, 1 to stop
2142 * now.
2143 */
2144static int cli_parse_show_errors(char **args, char *payload, struct appctx *appctx, void *private)
2145{
2146 if (!cli_has_level(appctx, ACCESS_LVL_OPER))
2147 return 1;
2148
2149 if (*args[2]) {
2150 struct proxy *px;
2151
2152 px = proxy_find_by_name(args[2], 0, 0);
2153 if (px)
2154 appctx->ctx.errors.iid = px->uuid;
2155 else
2156 appctx->ctx.errors.iid = atoi(args[2]);
2157
Willy Tarreau9d008692019-08-09 11:21:01 +02002158 if (!appctx->ctx.errors.iid)
2159 return cli_err(appctx, "No such proxy.\n");
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002160 }
2161 else
2162 appctx->ctx.errors.iid = -1; // dump all proxies
2163
2164 appctx->ctx.errors.flag = 0;
2165 if (strcmp(args[3], "request") == 0)
2166 appctx->ctx.errors.flag |= 4; // ignore response
2167 else if (strcmp(args[3], "response") == 0)
2168 appctx->ctx.errors.flag |= 2; // ignore request
2169 appctx->ctx.errors.px = NULL;
2170 return 0;
2171}
2172
2173/* This function dumps all captured errors onto the stream interface's
2174 * read buffer. It returns 0 if the output buffer is full and it needs
2175 * to be called again, otherwise non-zero.
2176 */
2177static int cli_io_handler_show_errors(struct appctx *appctx)
2178{
2179 struct stream_interface *si = appctx->owner;
2180 extern const char *monthname[12];
2181
2182 if (unlikely(si_ic(si)->flags & (CF_WRITE_ERROR|CF_SHUTW)))
2183 return 1;
2184
2185 chunk_reset(&trash);
2186
2187 if (!appctx->ctx.errors.px) {
2188 /* the function had not been called yet, let's prepare the
2189 * buffer for a response.
2190 */
2191 struct tm tm;
2192
2193 get_localtime(date.tv_sec, &tm);
2194 chunk_appendf(&trash, "Total events captured on [%02d/%s/%04d:%02d:%02d:%02d.%03d] : %u\n",
2195 tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
2196 tm.tm_hour, tm.tm_min, tm.tm_sec, (int)(date.tv_usec/1000),
2197 error_snapshot_id);
2198
Willy Tarreau36b27362018-09-07 19:55:44 +02002199 if (ci_putchk(si_ic(si), &trash) == -1)
2200 goto cant_send;
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002201
2202 appctx->ctx.errors.px = proxies_list;
2203 appctx->ctx.errors.bol = 0;
2204 appctx->ctx.errors.ptr = -1;
2205 }
2206
2207 /* we have two inner loops here, one for the proxy, the other one for
2208 * the buffer.
2209 */
2210 while (appctx->ctx.errors.px) {
2211 struct error_snapshot *es;
2212
Willy Tarreau36b27362018-09-07 19:55:44 +02002213 HA_SPIN_LOCK(PROXY_LOCK, &appctx->ctx.errors.px->lock);
2214
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002215 if ((appctx->ctx.errors.flag & 1) == 0) {
Willy Tarreauc55015e2018-09-07 19:02:32 +02002216 es = appctx->ctx.errors.px->invalid_req;
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002217 if (appctx->ctx.errors.flag & 2) // skip req
2218 goto next;
2219 }
2220 else {
Willy Tarreauc55015e2018-09-07 19:02:32 +02002221 es = appctx->ctx.errors.px->invalid_rep;
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002222 if (appctx->ctx.errors.flag & 4) // skip resp
2223 goto next;
2224 }
2225
Willy Tarreauc55015e2018-09-07 19:02:32 +02002226 if (!es)
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002227 goto next;
2228
2229 if (appctx->ctx.errors.iid >= 0 &&
2230 appctx->ctx.errors.px->uuid != appctx->ctx.errors.iid &&
Olivier Houchardbdb00c52020-03-12 15:30:17 +01002231 (!es->oe || es->oe->uuid != appctx->ctx.errors.iid))
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002232 goto next;
2233
2234 if (appctx->ctx.errors.ptr < 0) {
2235 /* just print headers now */
2236
2237 char pn[INET6_ADDRSTRLEN];
2238 struct tm tm;
2239 int port;
2240
2241 get_localtime(es->when.tv_sec, &tm);
2242 chunk_appendf(&trash, " \n[%02d/%s/%04d:%02d:%02d:%02d.%03d]",
2243 tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
2244 tm.tm_hour, tm.tm_min, tm.tm_sec, (int)(es->when.tv_usec/1000));
2245
2246 switch (addr_to_str(&es->src, pn, sizeof(pn))) {
2247 case AF_INET:
2248 case AF_INET6:
2249 port = get_host_port(&es->src);
2250 break;
2251 default:
2252 port = 0;
2253 }
2254
2255 switch (appctx->ctx.errors.flag & 1) {
2256 case 0:
2257 chunk_appendf(&trash,
2258 " frontend %s (#%d): invalid request\n"
2259 " backend %s (#%d)",
2260 appctx->ctx.errors.px->id, appctx->ctx.errors.px->uuid,
Olivier Houchardbdb00c52020-03-12 15:30:17 +01002261 (es->oe && es->oe->cap & PR_CAP_BE) ? es->oe->id : "<NONE>",
2262 (es->oe && es->oe->cap & PR_CAP_BE) ? es->oe->uuid : -1);
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002263 break;
2264 case 1:
2265 chunk_appendf(&trash,
2266 " backend %s (#%d): invalid response\n"
2267 " frontend %s (#%d)",
2268 appctx->ctx.errors.px->id, appctx->ctx.errors.px->uuid,
Olivier Houchardbdb00c52020-03-12 15:30:17 +01002269 es->oe ? es->oe->id : "<NONE>" , es->oe ? es->oe->uuid : -1);
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002270 break;
2271 }
2272
2273 chunk_appendf(&trash,
2274 ", server %s (#%d), event #%u, src %s:%d\n"
2275 " buffer starts at %llu (including %u out), %u free,\n"
2276 " len %u, wraps at %u, error at position %u\n",
2277 es->srv ? es->srv->id : "<NONE>",
2278 es->srv ? es->srv->puid : -1,
2279 es->ev_id, pn, port,
2280 es->buf_ofs, es->buf_out,
2281 global.tune.bufsize - es->buf_out - es->buf_len,
2282 es->buf_len, es->buf_wrap, es->buf_err);
2283
2284 if (es->show)
2285 es->show(&trash, es);
2286
2287 chunk_appendf(&trash, " \n");
2288
Willy Tarreau36b27362018-09-07 19:55:44 +02002289 if (ci_putchk(si_ic(si), &trash) == -1)
2290 goto cant_send_unlock;
2291
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002292 appctx->ctx.errors.ptr = 0;
2293 appctx->ctx.errors.ev_id = es->ev_id;
2294 }
2295
2296 if (appctx->ctx.errors.ev_id != es->ev_id) {
2297 /* the snapshot changed while we were dumping it */
2298 chunk_appendf(&trash,
2299 " WARNING! update detected on this snapshot, dump interrupted. Please re-check!\n");
Willy Tarreau36b27362018-09-07 19:55:44 +02002300 if (ci_putchk(si_ic(si), &trash) == -1)
2301 goto cant_send_unlock;
2302
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002303 goto next;
2304 }
2305
2306 /* OK, ptr >= 0, so we have to dump the current line */
Willy Tarreau4bc7d902018-09-07 20:07:17 +02002307 while (appctx->ctx.errors.ptr < es->buf_len && appctx->ctx.errors.ptr < global.tune.bufsize) {
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002308 int newptr;
2309 int newline;
2310
2311 newline = appctx->ctx.errors.bol;
2312 newptr = dump_text_line(&trash, es->buf, global.tune.bufsize, es->buf_len, &newline, appctx->ctx.errors.ptr);
2313 if (newptr == appctx->ctx.errors.ptr)
Willy Tarreau36b27362018-09-07 19:55:44 +02002314 goto cant_send_unlock;
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002315
Willy Tarreau36b27362018-09-07 19:55:44 +02002316 if (ci_putchk(si_ic(si), &trash) == -1)
2317 goto cant_send_unlock;
2318
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002319 appctx->ctx.errors.ptr = newptr;
2320 appctx->ctx.errors.bol = newline;
2321 };
2322 next:
Willy Tarreau36b27362018-09-07 19:55:44 +02002323 HA_SPIN_UNLOCK(PROXY_LOCK, &appctx->ctx.errors.px->lock);
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002324 appctx->ctx.errors.bol = 0;
2325 appctx->ctx.errors.ptr = -1;
2326 appctx->ctx.errors.flag ^= 1;
2327 if (!(appctx->ctx.errors.flag & 1))
2328 appctx->ctx.errors.px = appctx->ctx.errors.px->next;
2329 }
2330
2331 /* dump complete */
2332 return 1;
Willy Tarreau36b27362018-09-07 19:55:44 +02002333
2334 cant_send_unlock:
2335 HA_SPIN_UNLOCK(PROXY_LOCK, &appctx->ctx.errors.px->lock);
2336 cant_send:
Willy Tarreaudb398432018-11-15 11:08:52 +01002337 si_rx_room_blk(si);
Willy Tarreau36b27362018-09-07 19:55:44 +02002338 return 0;
Willy Tarreauddb68ac2018-09-07 18:34:24 +02002339}
2340
William Lallemanda6c5f332016-11-19 02:25:36 +01002341/* register cli keywords */
2342static struct cli_kw_list cli_kws = {{ },{
Willy Tarreau15b9e682016-11-24 11:55:28 +01002343 { { "disable", "frontend", NULL }, "disable frontend : temporarily disable specific frontend", cli_parse_disable_frontend, NULL, NULL },
2344 { { "enable", "frontend", NULL }, "enable frontend : re-enable specific frontend", cli_parse_enable_frontend, NULL, NULL },
Willy Tarreauc429a1f2016-11-23 16:22:04 +01002345 { { "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 +01002346 { { "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 +01002347 { { "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 +01002348 { { "shutdown", "frontend", NULL }, "shutdown frontend : stop a specific frontend", cli_parse_shutdown_frontend, NULL, NULL },
Olivier Houchard614f8d72017-03-14 20:08:46 +01002349 { { "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 },
2350 { { "enable", "dynamic-cookie", "backend", NULL }, "enable dynamic-cookie backend : enable dynamic cookies on a specific backend", cli_parse_enable_dyncookie_backend, NULL },
2351 { { "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 +02002352 { { "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 +01002353 {{},}
2354}};
2355
Willy Tarreau0108d902018-11-25 19:14:37 +01002356INITCALL1(STG_REGISTER, cli_register_kw, &cli_kws);
Willy Tarreaubaaee002006-06-26 02:48:02 +02002357
2358/*
2359 * Local variables:
2360 * c-indent-level: 8
2361 * c-basic-offset: 8
2362 * End:
2363 */