Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Backend variables and functions. |
| 3 | * |
Willy Tarreau | 1a7eca1 | 2013-01-07 22:38:03 +0100 | [diff] [blame] | 4 | * Copyright 2000-2013 Willy Tarreau <w@1wt.eu> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <errno.h> |
| 14 | #include <fcntl.h> |
| 15 | #include <stdio.h> |
| 16 | #include <stdlib.h> |
| 17 | #include <syslog.h> |
Willy Tarreau | f19cf37 | 2006-11-14 15:40:51 +0100 | [diff] [blame] | 18 | #include <string.h> |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 19 | #include <ctype.h> |
Dmitry Sivachenko | caf5898 | 2009-08-24 15:11:06 +0400 | [diff] [blame] | 20 | #include <sys/types.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 21 | |
Willy Tarreau | 63617db | 2021-10-06 18:23:40 +0200 | [diff] [blame] | 22 | #include <import/ebmbtree.h> |
| 23 | |
Willy Tarreau | 4c7e4b7 | 2020-05-27 12:58:42 +0200 | [diff] [blame] | 24 | #include <haproxy/api.h> |
Willy Tarreau | 5d9ddc5 | 2021-10-06 19:54:09 +0200 | [diff] [blame] | 25 | #include <haproxy/acl.h> |
| 26 | #include <haproxy/activity.h> |
Willy Tarreau | b255105 | 2020-06-09 09:07:15 +0200 | [diff] [blame] | 27 | #include <haproxy/arg.h> |
| 28 | #include <haproxy/backend.h> |
Willy Tarreau | f1d32c4 | 2020-06-04 21:07:02 +0200 | [diff] [blame] | 29 | #include <haproxy/channel.h> |
Willy Tarreau | 4aa573d | 2020-06-04 18:21:56 +0200 | [diff] [blame] | 30 | #include <haproxy/check.h> |
Willy Tarreau | 762d7a5 | 2020-06-04 11:23:07 +0200 | [diff] [blame] | 31 | #include <haproxy/frontend.h> |
Willy Tarreau | b255105 | 2020-06-09 09:07:15 +0200 | [diff] [blame] | 32 | #include <haproxy/global.h> |
Willy Tarreau | 8d36697 | 2020-05-27 16:10:29 +0200 | [diff] [blame] | 33 | #include <haproxy/hash.h> |
Willy Tarreau | cd72d8c | 2020-06-02 19:11:26 +0200 | [diff] [blame] | 34 | #include <haproxy/http.h> |
Willy Tarreau | c2b1ff0 | 2020-06-04 21:21:03 +0200 | [diff] [blame] | 35 | #include <haproxy/http_ana.h> |
Willy Tarreau | 8773533 | 2020-06-04 09:08:41 +0200 | [diff] [blame] | 36 | #include <haproxy/http_htx.h> |
Willy Tarreau | 16f958c | 2020-06-03 08:44:35 +0200 | [diff] [blame] | 37 | #include <haproxy/htx.h> |
Willy Tarreau | fbe8da3 | 2020-06-04 14:34:27 +0200 | [diff] [blame] | 38 | #include <haproxy/lb_chash.h> |
Willy Tarreau | b5fc3bf | 2020-06-04 14:37:38 +0200 | [diff] [blame] | 39 | #include <haproxy/lb_fas.h> |
Willy Tarreau | 0254941 | 2020-06-04 14:41:04 +0200 | [diff] [blame] | 40 | #include <haproxy/lb_fwlc.h> |
Willy Tarreau | 546ba42 | 2020-06-04 14:45:03 +0200 | [diff] [blame] | 41 | #include <haproxy/lb_fwrr.h> |
Willy Tarreau | 2867159 | 2020-06-04 20:22:59 +0200 | [diff] [blame] | 42 | #include <haproxy/lb_map.h> |
Willy Tarreau | aeed4a8 | 2020-06-04 22:01:04 +0200 | [diff] [blame] | 43 | #include <haproxy/log.h> |
Willy Tarreau | b255105 | 2020-06-09 09:07:15 +0200 | [diff] [blame] | 44 | #include <haproxy/namespace.h> |
Willy Tarreau | 8efbdfb | 2020-06-04 11:29:21 +0200 | [diff] [blame] | 45 | #include <haproxy/obj_type.h> |
Willy Tarreau | 469509b | 2020-06-04 15:13:30 +0200 | [diff] [blame] | 46 | #include <haproxy/payload.h> |
Willy Tarreau | b255105 | 2020-06-09 09:07:15 +0200 | [diff] [blame] | 47 | #include <haproxy/proto_tcp.h> |
| 48 | #include <haproxy/protocol.h> |
Willy Tarreau | a264d96 | 2020-06-04 22:29:18 +0200 | [diff] [blame] | 49 | #include <haproxy/proxy.h> |
Willy Tarreau | a55c454 | 2020-06-04 22:59:39 +0200 | [diff] [blame] | 50 | #include <haproxy/queue.h> |
Willy Tarreau | b255105 | 2020-06-09 09:07:15 +0200 | [diff] [blame] | 51 | #include <haproxy/sample.h> |
Willy Tarreau | 1e56f92 | 2020-06-04 23:20:13 +0200 | [diff] [blame] | 52 | #include <haproxy/server.h> |
Willy Tarreau | 48d25b3 | 2020-06-04 18:58:52 +0200 | [diff] [blame] | 53 | #include <haproxy/session.h> |
Willy Tarreau | 209108d | 2020-06-04 20:30:20 +0200 | [diff] [blame] | 54 | #include <haproxy/ssl_sock.h> |
Willy Tarreau | dfd3de8 | 2020-06-04 23:46:14 +0200 | [diff] [blame] | 55 | #include <haproxy/stream.h> |
Willy Tarreau | 5e539c9 | 2020-06-04 20:45:39 +0200 | [diff] [blame] | 56 | #include <haproxy/stream_interface.h> |
Willy Tarreau | cea0e1b | 2020-06-04 17:25:40 +0200 | [diff] [blame] | 57 | #include <haproxy/task.h> |
Willy Tarreau | c2f7c58 | 2020-06-02 18:15:32 +0200 | [diff] [blame] | 58 | #include <haproxy/ticks.h> |
Willy Tarreau | 92b4f13 | 2020-06-01 11:05:15 +0200 | [diff] [blame] | 59 | #include <haproxy/time.h> |
Willy Tarreau | dfd3de8 | 2020-06-04 23:46:14 +0200 | [diff] [blame] | 60 | #include <haproxy/trace.h> |
Willy Tarreau | 732eac4 | 2015-07-09 11:40:25 +0200 | [diff] [blame] | 61 | |
Christopher Faulet | eea8fc7 | 2019-11-05 16:18:10 +0100 | [diff] [blame] | 62 | #define TRACE_SOURCE &trace_strm |
| 63 | |
Bhaskar Maddala | a20cb85 | 2014-02-03 16:26:46 -0500 | [diff] [blame] | 64 | int be_lastsession(const struct proxy *be) |
| 65 | { |
| 66 | if (be->be_counters.last_sess) |
| 67 | return now.tv_sec - be->be_counters.last_sess; |
| 68 | |
| 69 | return -1; |
| 70 | } |
| 71 | |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 72 | /* helper function to invoke the correct hash method */ |
Dan Dubovik | bd57a9f | 2014-07-08 08:51:03 -0700 | [diff] [blame] | 73 | static unsigned int gen_hash(const struct proxy* px, const char* key, unsigned long len) |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 74 | { |
Dan Dubovik | bd57a9f | 2014-07-08 08:51:03 -0700 | [diff] [blame] | 75 | unsigned int hash; |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 76 | |
| 77 | switch (px->lbprm.algo & BE_LB_HASH_FUNC) { |
| 78 | case BE_LB_HFCN_DJB2: |
| 79 | hash = hash_djb2(key, len); |
| 80 | break; |
Willy Tarreau | a0f4271 | 2013-11-14 14:30:35 +0100 | [diff] [blame] | 81 | case BE_LB_HFCN_WT6: |
| 82 | hash = hash_wt6(key, len); |
| 83 | break; |
Willy Tarreau | 324f07f | 2015-01-20 19:44:50 +0100 | [diff] [blame] | 84 | case BE_LB_HFCN_CRC32: |
| 85 | hash = hash_crc32(key, len); |
| 86 | break; |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 87 | case BE_LB_HFCN_SDBM: |
| 88 | /* this is the default hash function */ |
| 89 | default: |
| 90 | hash = hash_sdbm(key, len); |
| 91 | break; |
| 92 | } |
| 93 | |
| 94 | return hash; |
| 95 | } |
| 96 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 97 | /* |
| 98 | * This function recounts the number of usable active and backup servers for |
| 99 | * proxy <p>. These numbers are returned into the p->srv_act and p->srv_bck. |
Willy Tarreau | b625a08 | 2007-11-26 01:15:43 +0100 | [diff] [blame] | 100 | * This function also recomputes the total active and backup weights. However, |
Willy Tarreau | f4cca45 | 2008-03-08 21:42:54 +0100 | [diff] [blame] | 101 | * it does not update tot_weight nor tot_used. Use update_backend_weight() for |
Willy Tarreau | b625a08 | 2007-11-26 01:15:43 +0100 | [diff] [blame] | 102 | * this. |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 103 | * This functions is designed to be called before server's weight and state |
| 104 | * commit so it uses 'next' weight and states values. |
Christopher Faulet | 5b51755 | 2017-06-09 14:17:53 +0200 | [diff] [blame] | 105 | * |
| 106 | * threads: this is the caller responsibility to lock data. For now, this |
| 107 | * function is called from lb modules, so it should be ok. But if you need to |
| 108 | * call it from another place, be careful (and update this comment). |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 109 | */ |
Willy Tarreau | c5d9c80 | 2009-10-01 09:17:05 +0200 | [diff] [blame] | 110 | void recount_servers(struct proxy *px) |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 111 | { |
| 112 | struct server *srv; |
| 113 | |
Willy Tarreau | 2069704 | 2007-11-15 23:26:18 +0100 | [diff] [blame] | 114 | px->srv_act = px->srv_bck = 0; |
| 115 | px->lbprm.tot_wact = px->lbprm.tot_wbck = 0; |
Willy Tarreau | b625a08 | 2007-11-26 01:15:43 +0100 | [diff] [blame] | 116 | px->lbprm.fbck = NULL; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 117 | for (srv = px->srv; srv != NULL; srv = srv->next) { |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 118 | if (!srv_willbe_usable(srv)) |
Willy Tarreau | b625a08 | 2007-11-26 01:15:43 +0100 | [diff] [blame] | 119 | continue; |
| 120 | |
Willy Tarreau | c93cd16 | 2014-05-13 15:54:22 +0200 | [diff] [blame] | 121 | if (srv->flags & SRV_F_BACKUP) { |
Willy Tarreau | b625a08 | 2007-11-26 01:15:43 +0100 | [diff] [blame] | 122 | if (!px->srv_bck && |
Willy Tarreau | f4cca45 | 2008-03-08 21:42:54 +0100 | [diff] [blame] | 123 | !(px->options & PR_O_USE_ALL_BK)) |
Willy Tarreau | b625a08 | 2007-11-26 01:15:43 +0100 | [diff] [blame] | 124 | px->lbprm.fbck = srv; |
| 125 | px->srv_bck++; |
Andrew Rodland | 13d5ebb | 2016-10-25 12:49:45 -0400 | [diff] [blame] | 126 | srv->cumulative_weight = px->lbprm.tot_wbck; |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 127 | px->lbprm.tot_wbck += srv->next_eweight; |
Willy Tarreau | b625a08 | 2007-11-26 01:15:43 +0100 | [diff] [blame] | 128 | } else { |
| 129 | px->srv_act++; |
Andrew Rodland | 13d5ebb | 2016-10-25 12:49:45 -0400 | [diff] [blame] | 130 | srv->cumulative_weight = px->lbprm.tot_wact; |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 131 | px->lbprm.tot_wact += srv->next_eweight; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 132 | } |
| 133 | } |
Willy Tarreau | b625a08 | 2007-11-26 01:15:43 +0100 | [diff] [blame] | 134 | } |
Willy Tarreau | 2069704 | 2007-11-15 23:26:18 +0100 | [diff] [blame] | 135 | |
Willy Tarreau | b625a08 | 2007-11-26 01:15:43 +0100 | [diff] [blame] | 136 | /* This function simply updates the backend's tot_weight and tot_used values |
| 137 | * after servers weights have been updated. It is designed to be used after |
| 138 | * recount_servers() or equivalent. |
Christopher Faulet | 5b51755 | 2017-06-09 14:17:53 +0200 | [diff] [blame] | 139 | * |
| 140 | * threads: this is the caller responsibility to lock data. For now, this |
| 141 | * function is called from lb modules, so it should be ok. But if you need to |
| 142 | * call it from another place, be careful (and update this comment). |
Willy Tarreau | b625a08 | 2007-11-26 01:15:43 +0100 | [diff] [blame] | 143 | */ |
Willy Tarreau | c5d9c80 | 2009-10-01 09:17:05 +0200 | [diff] [blame] | 144 | void update_backend_weight(struct proxy *px) |
Willy Tarreau | b625a08 | 2007-11-26 01:15:43 +0100 | [diff] [blame] | 145 | { |
Willy Tarreau | 2069704 | 2007-11-15 23:26:18 +0100 | [diff] [blame] | 146 | if (px->srv_act) { |
| 147 | px->lbprm.tot_weight = px->lbprm.tot_wact; |
| 148 | px->lbprm.tot_used = px->srv_act; |
| 149 | } |
Willy Tarreau | b625a08 | 2007-11-26 01:15:43 +0100 | [diff] [blame] | 150 | else if (px->lbprm.fbck) { |
| 151 | /* use only the first backup server */ |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 152 | px->lbprm.tot_weight = px->lbprm.fbck->next_eweight; |
Willy Tarreau | b625a08 | 2007-11-26 01:15:43 +0100 | [diff] [blame] | 153 | px->lbprm.tot_used = 1; |
Willy Tarreau | 2069704 | 2007-11-15 23:26:18 +0100 | [diff] [blame] | 154 | } |
| 155 | else { |
Willy Tarreau | b625a08 | 2007-11-26 01:15:43 +0100 | [diff] [blame] | 156 | px->lbprm.tot_weight = px->lbprm.tot_wbck; |
| 157 | px->lbprm.tot_used = px->srv_bck; |
Willy Tarreau | 2069704 | 2007-11-15 23:26:18 +0100 | [diff] [blame] | 158 | } |
Willy Tarreau | b625a08 | 2007-11-26 01:15:43 +0100 | [diff] [blame] | 159 | } |
| 160 | |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 161 | /* |
| 162 | * This function tries to find a running server for the proxy <px> following |
| 163 | * the source hash method. Depending on the number of active/backup servers, |
| 164 | * it will either look for active servers, or for backup servers. |
| 165 | * If any server is found, it will be returned. If no valid server is found, |
| 166 | * NULL is returned. |
| 167 | */ |
Willy Tarreau | 59884a6 | 2019-01-02 14:48:31 +0100 | [diff] [blame] | 168 | static struct server *get_server_sh(struct proxy *px, const char *addr, int len, const struct server *avoid) |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 169 | { |
| 170 | unsigned int h, l; |
| 171 | |
| 172 | if (px->lbprm.tot_weight == 0) |
| 173 | return NULL; |
| 174 | |
| 175 | l = h = 0; |
| 176 | |
| 177 | /* note: we won't hash if there's only one server left */ |
| 178 | if (px->lbprm.tot_used == 1) |
| 179 | goto hash_done; |
| 180 | |
| 181 | while ((l + sizeof (int)) <= len) { |
| 182 | h ^= ntohl(*(unsigned int *)(&addr[l])); |
| 183 | l += sizeof (int); |
| 184 | } |
Bhaskar Maddala | b6c0ac9 | 2013-11-05 11:54:02 -0500 | [diff] [blame] | 185 | if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL) |
Willy Tarreau | 798a39c | 2010-11-24 15:04:29 +0100 | [diff] [blame] | 186 | h = full_hash(h); |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 187 | hash_done: |
Willy Tarreau | 6c30be5 | 2019-01-14 17:07:39 +0100 | [diff] [blame] | 188 | if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE) |
Willy Tarreau | 59884a6 | 2019-01-02 14:48:31 +0100 | [diff] [blame] | 189 | return chash_get_server_hash(px, h, avoid); |
Willy Tarreau | 6b2e11b | 2009-10-01 07:52:15 +0200 | [diff] [blame] | 190 | else |
| 191 | return map_get_server_hash(px, h); |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | /* |
| 195 | * This function tries to find a running server for the proxy <px> following |
| 196 | * the URI hash method. In order to optimize cache hits, the hash computation |
| 197 | * ends at the question mark. Depending on the number of active/backup servers, |
| 198 | * it will either look for active servers, or for backup servers. |
| 199 | * If any server is found, it will be returned. If no valid server is found, |
Willy Tarreau | a9a7249 | 2019-01-14 16:14:15 +0100 | [diff] [blame] | 200 | * NULL is returned. The lbprm.arg_opt{1,2,3} values correspond respectively to |
Willy Tarreau | 3d1119d | 2020-09-23 08:05:47 +0200 | [diff] [blame] | 201 | * the "whole" optional argument (boolean, bit0), the "len" argument (numeric) |
| 202 | * and the "depth" argument (numeric). |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 203 | * |
| 204 | * This code was contributed by Guillaume Dallaire, who also selected this hash |
| 205 | * algorithm out of a tens because it gave him the best results. |
| 206 | * |
| 207 | */ |
Willy Tarreau | 59884a6 | 2019-01-02 14:48:31 +0100 | [diff] [blame] | 208 | static struct server *get_server_uh(struct proxy *px, char *uri, int uri_len, const struct server *avoid) |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 209 | { |
Dan Dubovik | bd57a9f | 2014-07-08 08:51:03 -0700 | [diff] [blame] | 210 | unsigned int hash = 0; |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 211 | int c; |
| 212 | int slashes = 0; |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 213 | const char *start, *end; |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 214 | |
| 215 | if (px->lbprm.tot_weight == 0) |
| 216 | return NULL; |
| 217 | |
| 218 | /* note: we won't hash if there's only one server left */ |
| 219 | if (px->lbprm.tot_used == 1) |
| 220 | goto hash_done; |
| 221 | |
Willy Tarreau | a9a7249 | 2019-01-14 16:14:15 +0100 | [diff] [blame] | 222 | if (px->lbprm.arg_opt2) // "len" |
| 223 | uri_len = MIN(uri_len, px->lbprm.arg_opt2); |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 224 | |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 225 | start = end = uri; |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 226 | while (uri_len--) { |
Willy Tarreau | fad4ffc | 2014-10-17 12:11:50 +0200 | [diff] [blame] | 227 | c = *end; |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 228 | if (c == '/') { |
| 229 | slashes++; |
Willy Tarreau | a9a7249 | 2019-01-14 16:14:15 +0100 | [diff] [blame] | 230 | if (slashes == px->lbprm.arg_opt3) /* depth+1 */ |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 231 | break; |
| 232 | } |
Willy Tarreau | 3d1119d | 2020-09-23 08:05:47 +0200 | [diff] [blame] | 233 | else if (c == '?' && !(px->lbprm.arg_opt1 & 1)) // "whole" |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 234 | break; |
Willy Tarreau | fad4ffc | 2014-10-17 12:11:50 +0200 | [diff] [blame] | 235 | end++; |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 236 | } |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 237 | |
| 238 | hash = gen_hash(px, start, (end - start)); |
| 239 | |
Bhaskar Maddala | b6c0ac9 | 2013-11-05 11:54:02 -0500 | [diff] [blame] | 240 | if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL) |
Willy Tarreau | 798a39c | 2010-11-24 15:04:29 +0100 | [diff] [blame] | 241 | hash = full_hash(hash); |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 242 | hash_done: |
Willy Tarreau | 6c30be5 | 2019-01-14 17:07:39 +0100 | [diff] [blame] | 243 | if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE) |
Willy Tarreau | 59884a6 | 2019-01-02 14:48:31 +0100 | [diff] [blame] | 244 | return chash_get_server_hash(px, hash, avoid); |
Willy Tarreau | 6b2e11b | 2009-10-01 07:52:15 +0200 | [diff] [blame] | 245 | else |
| 246 | return map_get_server_hash(px, hash); |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 247 | } |
| 248 | |
Christopher Faulet | 5b51755 | 2017-06-09 14:17:53 +0200 | [diff] [blame] | 249 | /* |
Willy Tarreau | 0173280 | 2007-11-01 22:48:15 +0100 | [diff] [blame] | 250 | * This function tries to find a running server for the proxy <px> following |
| 251 | * the URL parameter hash method. It looks for a specific parameter in the |
| 252 | * URL and hashes it to compute the server ID. This is useful to optimize |
| 253 | * performance by avoiding bounces between servers in contexts where sessions |
| 254 | * are shared but cookies are not usable. If the parameter is not found, NULL |
| 255 | * is returned. If any server is found, it will be returned. If no valid server |
| 256 | * is found, NULL is returned. |
Willy Tarreau | 0173280 | 2007-11-01 22:48:15 +0100 | [diff] [blame] | 257 | */ |
Willy Tarreau | 59884a6 | 2019-01-02 14:48:31 +0100 | [diff] [blame] | 258 | static struct server *get_server_ph(struct proxy *px, const char *uri, int uri_len, const struct server *avoid) |
Willy Tarreau | 0173280 | 2007-11-01 22:48:15 +0100 | [diff] [blame] | 259 | { |
Dan Dubovik | bd57a9f | 2014-07-08 08:51:03 -0700 | [diff] [blame] | 260 | unsigned int hash = 0; |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 261 | const char *start, *end; |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 262 | const char *p; |
| 263 | const char *params; |
Willy Tarreau | 0173280 | 2007-11-01 22:48:15 +0100 | [diff] [blame] | 264 | int plen; |
| 265 | |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 266 | /* when tot_weight is 0 then so is srv_count */ |
Willy Tarreau | 2069704 | 2007-11-15 23:26:18 +0100 | [diff] [blame] | 267 | if (px->lbprm.tot_weight == 0) |
Willy Tarreau | 0173280 | 2007-11-01 22:48:15 +0100 | [diff] [blame] | 268 | return NULL; |
| 269 | |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 270 | if ((p = memchr(uri, '?', uri_len)) == NULL) |
| 271 | return NULL; |
| 272 | |
Willy Tarreau | 0173280 | 2007-11-01 22:48:15 +0100 | [diff] [blame] | 273 | p++; |
| 274 | |
| 275 | uri_len -= (p - uri); |
Willy Tarreau | 4c03d1c | 2019-01-14 15:23:54 +0100 | [diff] [blame] | 276 | plen = px->lbprm.arg_len; |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 277 | params = p; |
Willy Tarreau | 0173280 | 2007-11-01 22:48:15 +0100 | [diff] [blame] | 278 | |
| 279 | while (uri_len > plen) { |
| 280 | /* Look for the parameter name followed by an equal symbol */ |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 281 | if (params[plen] == '=') { |
Willy Tarreau | 4c03d1c | 2019-01-14 15:23:54 +0100 | [diff] [blame] | 282 | if (memcmp(params, px->lbprm.arg_str, plen) == 0) { |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 283 | /* OK, we have the parameter here at <params>, and |
Willy Tarreau | 0173280 | 2007-11-01 22:48:15 +0100 | [diff] [blame] | 284 | * the value after the equal sign, at <p> |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 285 | * skip the equal symbol |
Willy Tarreau | 0173280 | 2007-11-01 22:48:15 +0100 | [diff] [blame] | 286 | */ |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 287 | p += plen + 1; |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 288 | start = end = p; |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 289 | uri_len -= plen + 1; |
| 290 | |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 291 | while (uri_len && *end != '&') { |
Willy Tarreau | 0173280 | 2007-11-01 22:48:15 +0100 | [diff] [blame] | 292 | uri_len--; |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 293 | end++; |
Willy Tarreau | 0173280 | 2007-11-01 22:48:15 +0100 | [diff] [blame] | 294 | } |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 295 | hash = gen_hash(px, start, (end - start)); |
| 296 | |
Bhaskar Maddala | b6c0ac9 | 2013-11-05 11:54:02 -0500 | [diff] [blame] | 297 | if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL) |
Willy Tarreau | 798a39c | 2010-11-24 15:04:29 +0100 | [diff] [blame] | 298 | hash = full_hash(hash); |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 299 | |
Willy Tarreau | 6c30be5 | 2019-01-14 17:07:39 +0100 | [diff] [blame] | 300 | if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE) |
Willy Tarreau | 59884a6 | 2019-01-02 14:48:31 +0100 | [diff] [blame] | 301 | return chash_get_server_hash(px, hash, avoid); |
Willy Tarreau | 6b2e11b | 2009-10-01 07:52:15 +0200 | [diff] [blame] | 302 | else |
| 303 | return map_get_server_hash(px, hash); |
Willy Tarreau | 0173280 | 2007-11-01 22:48:15 +0100 | [diff] [blame] | 304 | } |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 305 | } |
| 306 | /* skip to next parameter */ |
| 307 | p = memchr(params, '&', uri_len); |
| 308 | if (!p) |
| 309 | return NULL; |
| 310 | p++; |
| 311 | uri_len -= (p - params); |
| 312 | params = p; |
| 313 | } |
| 314 | return NULL; |
| 315 | } |
| 316 | |
| 317 | /* |
| 318 | * this does the same as the previous server_ph, but check the body contents |
| 319 | */ |
Willy Tarreau | 59884a6 | 2019-01-02 14:48:31 +0100 | [diff] [blame] | 320 | static struct server *get_server_ph_post(struct stream *s, const struct server *avoid) |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 321 | { |
Dan Dubovik | bd57a9f | 2014-07-08 08:51:03 -0700 | [diff] [blame] | 322 | unsigned int hash = 0; |
Willy Tarreau | 22ec1ea | 2014-11-27 20:45:39 +0100 | [diff] [blame] | 323 | struct channel *req = &s->req; |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 324 | struct proxy *px = s->be; |
Christopher Faulet | 7d37fbb | 2019-07-15 15:37:57 +0200 | [diff] [blame] | 325 | struct htx *htx = htxbuf(&req->buf); |
| 326 | struct htx_blk *blk; |
Willy Tarreau | 4c03d1c | 2019-01-14 15:23:54 +0100 | [diff] [blame] | 327 | unsigned int plen = px->lbprm.arg_len; |
Christopher Faulet | f7679ad | 2019-02-04 12:02:18 +0100 | [diff] [blame] | 328 | unsigned long len; |
| 329 | const char *params, *p, *start, *end; |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 330 | |
Christopher Faulet | f7679ad | 2019-02-04 12:02:18 +0100 | [diff] [blame] | 331 | if (px->lbprm.tot_weight == 0) |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 332 | return NULL; |
| 333 | |
Christopher Faulet | 7d37fbb | 2019-07-15 15:37:57 +0200 | [diff] [blame] | 334 | p = params = NULL; |
| 335 | len = 0; |
| 336 | for (blk = htx_get_first_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) { |
| 337 | enum htx_blk_type type = htx_get_blk_type(blk); |
| 338 | struct ist v; |
Willy Tarreau | f69d4ff | 2015-05-02 00:05:47 +0200 | [diff] [blame] | 339 | |
Christopher Faulet | 7d37fbb | 2019-07-15 15:37:57 +0200 | [diff] [blame] | 340 | if (type != HTX_BLK_DATA) |
| 341 | continue; |
| 342 | v = htx_get_blk_value(htx, blk); |
| 343 | p = params = v.ptr; |
| 344 | len = v.len; |
| 345 | break; |
Christopher Faulet | f7679ad | 2019-02-04 12:02:18 +0100 | [diff] [blame] | 346 | } |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 347 | |
| 348 | while (len > plen) { |
| 349 | /* Look for the parameter name followed by an equal symbol */ |
| 350 | if (params[plen] == '=') { |
Willy Tarreau | 4c03d1c | 2019-01-14 15:23:54 +0100 | [diff] [blame] | 351 | if (memcmp(params, px->lbprm.arg_str, plen) == 0) { |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 352 | /* OK, we have the parameter here at <params>, and |
| 353 | * the value after the equal sign, at <p> |
| 354 | * skip the equal symbol |
| 355 | */ |
| 356 | p += plen + 1; |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 357 | start = end = p; |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 358 | len -= plen + 1; |
| 359 | |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 360 | while (len && *end != '&') { |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 361 | if (unlikely(!HTTP_IS_TOKEN(*p))) { |
Willy Tarreau | 157dd63 | 2009-12-06 19:18:09 +0100 | [diff] [blame] | 362 | /* if in a POST, body must be URI encoded or it's not a URI. |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 363 | * Do not interpret any possible binary data as a parameter. |
Willy Tarreau | 157dd63 | 2009-12-06 19:18:09 +0100 | [diff] [blame] | 364 | */ |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 365 | if (likely(HTTP_IS_LWS(*p))) /* eol, uncertain uri len */ |
| 366 | break; |
| 367 | return NULL; /* oh, no; this is not uri-encoded. |
| 368 | * This body does not contain parameters. |
| 369 | */ |
| 370 | } |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 371 | len--; |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 372 | end++; |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 373 | /* should we break if vlen exceeds limit? */ |
| 374 | } |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 375 | hash = gen_hash(px, start, (end - start)); |
| 376 | |
Bhaskar Maddala | b6c0ac9 | 2013-11-05 11:54:02 -0500 | [diff] [blame] | 377 | if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL) |
Willy Tarreau | 798a39c | 2010-11-24 15:04:29 +0100 | [diff] [blame] | 378 | hash = full_hash(hash); |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 379 | |
Willy Tarreau | 6c30be5 | 2019-01-14 17:07:39 +0100 | [diff] [blame] | 380 | if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE) |
Willy Tarreau | 59884a6 | 2019-01-02 14:48:31 +0100 | [diff] [blame] | 381 | return chash_get_server_hash(px, hash, avoid); |
Willy Tarreau | 6b2e11b | 2009-10-01 07:52:15 +0200 | [diff] [blame] | 382 | else |
| 383 | return map_get_server_hash(px, hash); |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 384 | } |
| 385 | } |
Willy Tarreau | 0173280 | 2007-11-01 22:48:15 +0100 | [diff] [blame] | 386 | /* skip to next parameter */ |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 387 | p = memchr(params, '&', len); |
Willy Tarreau | 0173280 | 2007-11-01 22:48:15 +0100 | [diff] [blame] | 388 | if (!p) |
| 389 | return NULL; |
| 390 | p++; |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 391 | len -= (p - params); |
| 392 | params = p; |
Willy Tarreau | 0173280 | 2007-11-01 22:48:15 +0100 | [diff] [blame] | 393 | } |
| 394 | return NULL; |
| 395 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 396 | |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 397 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 398 | /* |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 399 | * This function tries to find a running server for the proxy <px> following |
| 400 | * the Header parameter hash method. It looks for a specific parameter in the |
| 401 | * URL and hashes it to compute the server ID. This is useful to optimize |
| 402 | * performance by avoiding bounces between servers in contexts where sessions |
| 403 | * are shared but cookies are not usable. If the parameter is not found, NULL |
| 404 | * is returned. If any server is found, it will be returned. If no valid server |
Willy Tarreau | 9fed858 | 2019-01-14 16:04:54 +0100 | [diff] [blame] | 405 | * is found, NULL is returned. When lbprm.arg_opt1 is set, the hash will only |
| 406 | * apply to the middle part of a domain name ("use_domain_only" option). |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 407 | */ |
Willy Tarreau | 59884a6 | 2019-01-02 14:48:31 +0100 | [diff] [blame] | 408 | static struct server *get_server_hh(struct stream *s, const struct server *avoid) |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 409 | { |
Dan Dubovik | bd57a9f | 2014-07-08 08:51:03 -0700 | [diff] [blame] | 410 | unsigned int hash = 0; |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 411 | struct proxy *px = s->be; |
Willy Tarreau | 484ff07 | 2019-01-14 15:28:53 +0100 | [diff] [blame] | 412 | unsigned int plen = px->lbprm.arg_len; |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 413 | unsigned long len; |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 414 | const char *p; |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 415 | const char *start, *end; |
Christopher Faulet | 7d37fbb | 2019-07-15 15:37:57 +0200 | [diff] [blame] | 416 | struct htx *htx = htxbuf(&s->req.buf); |
| 417 | struct http_hdr_ctx ctx = { .blk = NULL }; |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 418 | |
| 419 | /* tot_weight appears to mean srv_count */ |
| 420 | if (px->lbprm.tot_weight == 0) |
| 421 | return NULL; |
| 422 | |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 423 | /* note: we won't hash if there's only one server left */ |
| 424 | if (px->lbprm.tot_used == 1) |
| 425 | goto hash_done; |
| 426 | |
Christopher Faulet | 7d37fbb | 2019-07-15 15:37:57 +0200 | [diff] [blame] | 427 | http_find_header(htx, ist2(px->lbprm.arg_str, plen), &ctx, 0); |
Christopher Faulet | f7679ad | 2019-02-04 12:02:18 +0100 | [diff] [blame] | 428 | |
Christopher Faulet | 7d37fbb | 2019-07-15 15:37:57 +0200 | [diff] [blame] | 429 | /* if the header is not found or empty, let's fallback to round robin */ |
| 430 | if (!ctx.blk || !ctx.value.len) |
| 431 | return NULL; |
Christopher Faulet | f7679ad | 2019-02-04 12:02:18 +0100 | [diff] [blame] | 432 | |
Christopher Faulet | 7d37fbb | 2019-07-15 15:37:57 +0200 | [diff] [blame] | 433 | /* Found a the param_name in the headers. |
| 434 | * we will compute the hash based on this value ctx.val. |
| 435 | */ |
| 436 | len = ctx.value.len; |
| 437 | p = ctx.value.ptr; |
Christopher Faulet | f7679ad | 2019-02-04 12:02:18 +0100 | [diff] [blame] | 438 | |
Willy Tarreau | 9fed858 | 2019-01-14 16:04:54 +0100 | [diff] [blame] | 439 | if (!px->lbprm.arg_opt1) { |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 440 | hash = gen_hash(px, p, len); |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 441 | } else { |
| 442 | int dohash = 0; |
Cyril Bonté | f607d81 | 2015-01-04 15:17:36 +0100 | [diff] [blame] | 443 | p += len; |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 444 | /* special computation, use only main domain name, not tld/host |
| 445 | * going back from the end of string, start hashing at first |
| 446 | * dot stop at next. |
| 447 | * This is designed to work with the 'Host' header, and requires |
| 448 | * a special option to activate this. |
| 449 | */ |
Cyril Bonté | f607d81 | 2015-01-04 15:17:36 +0100 | [diff] [blame] | 450 | end = p; |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 451 | while (len) { |
Cyril Bonté | f607d81 | 2015-01-04 15:17:36 +0100 | [diff] [blame] | 452 | if (dohash) { |
| 453 | /* Rewind the pointer until the previous char |
| 454 | * is a dot, this will allow to set the start |
| 455 | * position of the domain. */ |
| 456 | if (*(p - 1) == '.') |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 457 | break; |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 458 | } |
Cyril Bonté | f607d81 | 2015-01-04 15:17:36 +0100 | [diff] [blame] | 459 | else if (*p == '.') { |
| 460 | /* The pointer is rewinded to the dot before the |
| 461 | * tld, we memorize the end of the domain and |
| 462 | * can enter the domain processing. */ |
| 463 | end = p; |
| 464 | dohash = 1; |
| 465 | } |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 466 | p--; |
Cyril Bonté | f607d81 | 2015-01-04 15:17:36 +0100 | [diff] [blame] | 467 | len--; |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 468 | } |
Cyril Bonté | f607d81 | 2015-01-04 15:17:36 +0100 | [diff] [blame] | 469 | start = p; |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 470 | hash = gen_hash(px, start, (end - start)); |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 471 | } |
Bhaskar Maddala | b6c0ac9 | 2013-11-05 11:54:02 -0500 | [diff] [blame] | 472 | if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL) |
Willy Tarreau | 798a39c | 2010-11-24 15:04:29 +0100 | [diff] [blame] | 473 | hash = full_hash(hash); |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 474 | hash_done: |
Willy Tarreau | 6c30be5 | 2019-01-14 17:07:39 +0100 | [diff] [blame] | 475 | if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE) |
Willy Tarreau | 59884a6 | 2019-01-02 14:48:31 +0100 | [diff] [blame] | 476 | return chash_get_server_hash(px, hash, avoid); |
Willy Tarreau | 6b2e11b | 2009-10-01 07:52:15 +0200 | [diff] [blame] | 477 | else |
| 478 | return map_get_server_hash(px, hash); |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 479 | } |
| 480 | |
Willy Tarreau | 34db108 | 2012-04-19 17:16:54 +0200 | [diff] [blame] | 481 | /* RDP Cookie HASH. */ |
Willy Tarreau | 59884a6 | 2019-01-02 14:48:31 +0100 | [diff] [blame] | 482 | static struct server *get_server_rch(struct stream *s, const struct server *avoid) |
Emeric Brun | 736aa23 | 2009-06-30 17:56:00 +0200 | [diff] [blame] | 483 | { |
Dan Dubovik | bd57a9f | 2014-07-08 08:51:03 -0700 | [diff] [blame] | 484 | unsigned int hash = 0; |
Emeric Brun | 736aa23 | 2009-06-30 17:56:00 +0200 | [diff] [blame] | 485 | struct proxy *px = s->be; |
| 486 | unsigned long len; |
Emeric Brun | 736aa23 | 2009-06-30 17:56:00 +0200 | [diff] [blame] | 487 | int ret; |
Willy Tarreau | 3740635 | 2012-04-23 16:16:37 +0200 | [diff] [blame] | 488 | struct sample smp; |
Willy Tarreau | d1de8af | 2012-05-18 22:12:14 +0200 | [diff] [blame] | 489 | int rewind; |
Emeric Brun | 736aa23 | 2009-06-30 17:56:00 +0200 | [diff] [blame] | 490 | |
| 491 | /* tot_weight appears to mean srv_count */ |
| 492 | if (px->lbprm.tot_weight == 0) |
| 493 | return NULL; |
| 494 | |
Willy Tarreau | 3740635 | 2012-04-23 16:16:37 +0200 | [diff] [blame] | 495 | memset(&smp, 0, sizeof(smp)); |
Emeric Brun | 736aa23 | 2009-06-30 17:56:00 +0200 | [diff] [blame] | 496 | |
Willy Tarreau | 6a445eb | 2018-06-19 07:04:45 +0200 | [diff] [blame] | 497 | rewind = co_data(&s->req); |
| 498 | c_rew(&s->req, rewind); |
Willy Tarreau | d1de8af | 2012-05-18 22:12:14 +0200 | [diff] [blame] | 499 | |
Willy Tarreau | 484ff07 | 2019-01-14 15:28:53 +0100 | [diff] [blame] | 500 | ret = fetch_rdp_cookie_name(s, &smp, px->lbprm.arg_str, px->lbprm.arg_len); |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 501 | len = smp.data.u.str.data; |
Willy Tarreau | 664092c | 2011-12-16 19:11:42 +0100 | [diff] [blame] | 502 | |
Willy Tarreau | bcbd393 | 2018-06-06 07:13:22 +0200 | [diff] [blame] | 503 | c_adv(&s->req, rewind); |
Willy Tarreau | d1de8af | 2012-05-18 22:12:14 +0200 | [diff] [blame] | 504 | |
Willy Tarreau | 3740635 | 2012-04-23 16:16:37 +0200 | [diff] [blame] | 505 | if (ret == 0 || (smp.flags & SMP_F_MAY_CHANGE) || len == 0) |
Emeric Brun | 736aa23 | 2009-06-30 17:56:00 +0200 | [diff] [blame] | 506 | return NULL; |
| 507 | |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 508 | /* note: we won't hash if there's only one server left */ |
| 509 | if (px->lbprm.tot_used == 1) |
| 510 | goto hash_done; |
| 511 | |
Willy Tarreau | 484ff07 | 2019-01-14 15:28:53 +0100 | [diff] [blame] | 512 | /* Found the param_name in the headers. |
Emeric Brun | 736aa23 | 2009-06-30 17:56:00 +0200 | [diff] [blame] | 513 | * we will compute the hash based on this value ctx.val. |
| 514 | */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 515 | hash = gen_hash(px, smp.data.u.str.area, len); |
Bhaskar | 98634f0 | 2013-10-29 23:30:51 -0400 | [diff] [blame] | 516 | |
Bhaskar Maddala | b6c0ac9 | 2013-11-05 11:54:02 -0500 | [diff] [blame] | 517 | if ((px->lbprm.algo & BE_LB_HASH_MOD) == BE_LB_HMOD_AVAL) |
Willy Tarreau | 798a39c | 2010-11-24 15:04:29 +0100 | [diff] [blame] | 518 | hash = full_hash(hash); |
Willy Tarreau | 39c9ba7 | 2009-10-01 21:11:15 +0200 | [diff] [blame] | 519 | hash_done: |
Willy Tarreau | 6c30be5 | 2019-01-14 17:07:39 +0100 | [diff] [blame] | 520 | if ((px->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE) |
Willy Tarreau | 59884a6 | 2019-01-02 14:48:31 +0100 | [diff] [blame] | 521 | return chash_get_server_hash(px, hash, avoid); |
Willy Tarreau | 6b2e11b | 2009-10-01 07:52:15 +0200 | [diff] [blame] | 522 | else |
| 523 | return map_get_server_hash(px, hash); |
Emeric Brun | 736aa23 | 2009-06-30 17:56:00 +0200 | [diff] [blame] | 524 | } |
Christopher Faulet | 5b51755 | 2017-06-09 14:17:53 +0200 | [diff] [blame] | 525 | |
Willy Tarreau | 760e81d | 2018-05-03 07:20:40 +0200 | [diff] [blame] | 526 | /* random value */ |
Willy Tarreau | 59884a6 | 2019-01-02 14:48:31 +0100 | [diff] [blame] | 527 | static struct server *get_server_rnd(struct stream *s, const struct server *avoid) |
Willy Tarreau | 760e81d | 2018-05-03 07:20:40 +0200 | [diff] [blame] | 528 | { |
| 529 | unsigned int hash = 0; |
| 530 | struct proxy *px = s->be; |
Willy Tarreau | 21c741a | 2019-01-14 18:14:27 +0100 | [diff] [blame] | 531 | struct server *prev, *curr; |
| 532 | int draws = px->lbprm.arg_opt1; // number of draws |
Willy Tarreau | 760e81d | 2018-05-03 07:20:40 +0200 | [diff] [blame] | 533 | |
| 534 | /* tot_weight appears to mean srv_count */ |
| 535 | if (px->lbprm.tot_weight == 0) |
| 536 | return NULL; |
| 537 | |
Willy Tarreau | 21c741a | 2019-01-14 18:14:27 +0100 | [diff] [blame] | 538 | curr = NULL; |
| 539 | do { |
| 540 | prev = curr; |
Ubuntu | 1adaddb | 2021-03-01 07:57:54 +0000 | [diff] [blame] | 541 | hash = statistical_prng(); |
Willy Tarreau | 21c741a | 2019-01-14 18:14:27 +0100 | [diff] [blame] | 542 | curr = chash_get_server_hash(px, hash, avoid); |
| 543 | if (!curr) |
| 544 | break; |
| 545 | |
| 546 | /* compare the new server to the previous best choice and pick |
| 547 | * the one with the least currently served requests. |
| 548 | */ |
| 549 | if (prev && prev != curr && |
| 550 | curr->served * prev->cur_eweight > prev->served * curr->cur_eweight) |
| 551 | curr = prev; |
| 552 | } while (--draws > 0); |
| 553 | |
Willy Tarreau | b88ae18 | 2020-09-29 16:58:30 +0200 | [diff] [blame] | 554 | /* if the selected server is full, pretend we have none so that we reach |
| 555 | * the backend's queue instead. |
| 556 | */ |
| 557 | if (curr && |
Willy Tarreau | a057045 | 2021-06-18 09:30:30 +0200 | [diff] [blame] | 558 | (curr->queue.length || (curr->maxconn && curr->served >= srv_dynamic_maxconn(curr)))) |
Willy Tarreau | b88ae18 | 2020-09-29 16:58:30 +0200 | [diff] [blame] | 559 | curr = NULL; |
| 560 | |
Willy Tarreau | 21c741a | 2019-01-14 18:14:27 +0100 | [diff] [blame] | 561 | return curr; |
Willy Tarreau | 760e81d | 2018-05-03 07:20:40 +0200 | [diff] [blame] | 562 | } |
| 563 | |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 564 | /* |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 565 | * This function applies the load-balancing algorithm to the stream, as |
| 566 | * defined by the backend it is assigned to. The stream is then marked as |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 567 | * 'assigned'. |
| 568 | * |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 569 | * This function MAY NOT be called with SF_ASSIGNED already set. If the stream |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 570 | * had a server previously assigned, it is rebalanced, trying to avoid the same |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 571 | * server, which should still be present in target_srv(&s->target) before the call. |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 572 | * The function tries to keep the original connection slot if it reconnects to |
| 573 | * the same server, otherwise it releases it and tries to offer it. |
| 574 | * |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 575 | * It is illegal to call this function with a stream in a queue. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 576 | * |
| 577 | * It may return : |
Willy Tarreau | 664beb8 | 2011-03-10 11:38:29 +0100 | [diff] [blame] | 578 | * SRV_STATUS_OK if everything is OK. ->srv and ->target are assigned. |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 579 | * SRV_STATUS_NOSRV if no server is available. Stream is not ASSIGNED |
| 580 | * SRV_STATUS_FULL if all servers are saturated. Stream is not ASSIGNED |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 581 | * SRV_STATUS_INTERNAL for other unrecoverable errors. |
| 582 | * |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 583 | * Upon successful return, the stream flag SF_ASSIGNED is set to indicate that |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 584 | * it does not need to be called anymore. This means that target_srv(&s->target) |
| 585 | * can be trusted in balance and direct modes. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 586 | * |
| 587 | */ |
| 588 | |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 589 | int assign_server(struct stream *s) |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 590 | { |
Olivier Houchard | ba4fff5 | 2018-12-01 14:40:40 +0100 | [diff] [blame] | 591 | struct connection *conn = NULL; |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 592 | struct server *conn_slot; |
Olivier Houchard | 00cf70f | 2018-11-30 17:24:55 +0100 | [diff] [blame] | 593 | struct server *srv = NULL, *prev_srv; |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 594 | int err; |
Krzysztof Piotr Oledzki | 5a329cf | 2008-02-22 03:50:19 +0100 | [diff] [blame] | 595 | |
Simon Horman | 8effd3d | 2011-08-13 08:03:52 +0900 | [diff] [blame] | 596 | DPRINTF(stderr,"assign_server : s=%p\n",s); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 597 | |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 598 | err = SRV_STATUS_INTERNAL; |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 599 | if (unlikely(s->pend_pos || s->flags & SF_ASSIGNED)) |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 600 | goto out_err; |
Krzysztof Piotr Oledzki | 5a329cf | 2008-02-22 03:50:19 +0100 | [diff] [blame] | 601 | |
Willy Tarreau | 3fdb366 | 2012-11-12 00:42:33 +0100 | [diff] [blame] | 602 | prev_srv = objt_server(s->target); |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 603 | conn_slot = s->srv_conn; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 604 | |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 605 | /* We have to release any connection slot before applying any LB algo, |
| 606 | * otherwise we may erroneously end up with no available slot. |
| 607 | */ |
| 608 | if (conn_slot) |
| 609 | sess_change_server(s, NULL); |
| 610 | |
Willy Tarreau | 3fdb366 | 2012-11-12 00:42:33 +0100 | [diff] [blame] | 611 | /* We will now try to find the good server and store it into <objt_server(s->target)>. |
| 612 | * Note that <objt_server(s->target)> may be NULL in case of dispatch or proxy mode, |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 613 | * as well as if no server is available (check error code). |
| 614 | */ |
Willy Tarreau | 1a20a5d | 2007-11-01 21:08:19 +0100 | [diff] [blame] | 615 | |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 616 | srv = NULL; |
Willy Tarreau | 3fdb366 | 2012-11-12 00:42:33 +0100 | [diff] [blame] | 617 | s->target = NULL; |
Willy Tarreau | 664beb8 | 2011-03-10 11:38:29 +0100 | [diff] [blame] | 618 | |
Olivier Houchard | ba4fff5 | 2018-12-01 14:40:40 +0100 | [diff] [blame] | 619 | if ((s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_HI && |
Olivier Houchard | 250031e | 2019-05-29 15:01:50 +0200 | [diff] [blame] | 620 | ((s->sess->flags & SESS_FL_PREFER_LAST) || |
Olivier Houchard | ba4fff5 | 2018-12-01 14:40:40 +0100 | [diff] [blame] | 621 | (s->be->options & PR_O_PREF_LAST))) { |
Olivier Houchard | 351411f | 2018-12-27 17:20:54 +0100 | [diff] [blame] | 622 | struct sess_srv_list *srv_list; |
| 623 | list_for_each_entry(srv_list, &s->sess->srv_list, srv_list) { |
| 624 | struct server *tmpsrv = objt_server(srv_list->target); |
Olivier Houchard | ba4fff5 | 2018-12-01 14:40:40 +0100 | [diff] [blame] | 625 | |
| 626 | if (tmpsrv && tmpsrv->proxy == s->be && |
Olivier Houchard | 250031e | 2019-05-29 15:01:50 +0200 | [diff] [blame] | 627 | ((s->sess->flags & SESS_FL_PREFER_LAST) || |
Olivier Houchard | ba4fff5 | 2018-12-01 14:40:40 +0100 | [diff] [blame] | 628 | (!s->be->max_ka_queue || |
| 629 | server_has_room(tmpsrv) || ( |
Willy Tarreau | a057045 | 2021-06-18 09:30:30 +0200 | [diff] [blame] | 630 | tmpsrv->queue.length + 1 < s->be->max_ka_queue))) && |
Olivier Houchard | ba4fff5 | 2018-12-01 14:40:40 +0100 | [diff] [blame] | 631 | srv_currently_usable(tmpsrv)) { |
Olivier Houchard | 351411f | 2018-12-27 17:20:54 +0100 | [diff] [blame] | 632 | list_for_each_entry(conn, &srv_list->conn_list, session_list) { |
Willy Tarreau | 911db9b | 2020-01-23 16:27:54 +0100 | [diff] [blame] | 633 | if (!(conn->flags & CO_FL_WAIT_XPRT)) { |
Olivier Houchard | ba4fff5 | 2018-12-01 14:40:40 +0100 | [diff] [blame] | 634 | srv = tmpsrv; |
| 635 | s->target = &srv->obj_type; |
Christopher Faulet | e91a526 | 2020-07-01 18:56:30 +0200 | [diff] [blame] | 636 | if (conn->flags & CO_FL_SESS_IDLE) { |
| 637 | conn->flags &= ~CO_FL_SESS_IDLE; |
| 638 | s->sess->idle_conns--; |
| 639 | } |
Olivier Houchard | ba4fff5 | 2018-12-01 14:40:40 +0100 | [diff] [blame] | 640 | goto out_ok; |
| 641 | } |
| 642 | } |
Olivier Houchard | 00cf70f | 2018-11-30 17:24:55 +0100 | [diff] [blame] | 643 | } |
| 644 | } |
Willy Tarreau | 9420b12 | 2013-12-15 18:58:25 +0100 | [diff] [blame] | 645 | } |
Christopher Faulet | 5b51755 | 2017-06-09 14:17:53 +0200 | [diff] [blame] | 646 | |
Willy Tarreau | 82cd5c1 | 2020-09-29 17:07:21 +0200 | [diff] [blame] | 647 | if (s->be->lbprm.algo & BE_LB_KIND) { |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 648 | /* we must check if we have at least one server available */ |
| 649 | if (!s->be->lbprm.tot_weight) { |
| 650 | err = SRV_STATUS_NOSRV; |
| 651 | goto out; |
| 652 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 653 | |
Willy Tarreau | 82cd5c1 | 2020-09-29 17:07:21 +0200 | [diff] [blame] | 654 | /* if there's some queue on the backend, with certain algos we |
| 655 | * know it's because all servers are full. |
| 656 | */ |
Willy Tarreau | 7f3c1df | 2021-06-18 09:22:21 +0200 | [diff] [blame] | 657 | if (s->be->queue.length && s->be->queue.length != s->be->beconn && |
Willy Tarreau | 8ae8c48 | 2020-10-22 17:19:07 +0200 | [diff] [blame] | 658 | (((s->be->lbprm.algo & (BE_LB_KIND|BE_LB_NEED|BE_LB_PARM)) == BE_LB_ALGO_FAS)|| // first |
Willy Tarreau | 82cd5c1 | 2020-09-29 17:07:21 +0200 | [diff] [blame] | 659 | ((s->be->lbprm.algo & (BE_LB_KIND|BE_LB_NEED|BE_LB_PARM)) == BE_LB_ALGO_RR) || // roundrobin |
| 660 | ((s->be->lbprm.algo & (BE_LB_KIND|BE_LB_NEED|BE_LB_PARM)) == BE_LB_ALGO_SRR))) { // static-rr |
| 661 | err = SRV_STATUS_FULL; |
| 662 | goto out; |
| 663 | } |
| 664 | |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 665 | /* First check whether we need to fetch some data or simply call |
| 666 | * the LB lookup function. Only the hashing functions will need |
| 667 | * some input data in fact, and will support multiple algorithms. |
| 668 | */ |
| 669 | switch (s->be->lbprm.algo & BE_LB_LKUP) { |
| 670 | case BE_LB_LKUP_RRTREE: |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 671 | srv = fwrr_get_next_server(s->be, prev_srv); |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 672 | break; |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 673 | |
Willy Tarreau | f09c660 | 2012-02-13 17:12:08 +0100 | [diff] [blame] | 674 | case BE_LB_LKUP_FSTREE: |
| 675 | srv = fas_get_next_server(s->be, prev_srv); |
| 676 | break; |
| 677 | |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 678 | case BE_LB_LKUP_LCTREE: |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 679 | srv = fwlc_get_next_server(s->be, prev_srv); |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 680 | break; |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 681 | |
Willy Tarreau | 6b2e11b | 2009-10-01 07:52:15 +0200 | [diff] [blame] | 682 | case BE_LB_LKUP_CHTREE: |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 683 | case BE_LB_LKUP_MAP: |
Willy Tarreau | 9757a38 | 2009-10-03 12:56:50 +0200 | [diff] [blame] | 684 | if ((s->be->lbprm.algo & BE_LB_KIND) == BE_LB_KIND_RR) { |
Willy Tarreau | 5ffb045 | 2021-06-22 17:31:51 +0200 | [diff] [blame] | 685 | /* static-rr (map) or random (chash) */ |
Willy Tarreau | 760e81d | 2018-05-03 07:20:40 +0200 | [diff] [blame] | 686 | if ((s->be->lbprm.algo & BE_LB_PARM) == BE_LB_RR_RANDOM) |
Willy Tarreau | 59884a6 | 2019-01-02 14:48:31 +0100 | [diff] [blame] | 687 | srv = get_server_rnd(s, prev_srv); |
Willy Tarreau | 6b2e11b | 2009-10-01 07:52:15 +0200 | [diff] [blame] | 688 | else |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 689 | srv = map_get_server_rr(s->be, prev_srv); |
Willy Tarreau | 9757a38 | 2009-10-03 12:56:50 +0200 | [diff] [blame] | 690 | break; |
| 691 | } |
| 692 | else if ((s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_HI) { |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 693 | /* unknown balancing algorithm */ |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 694 | err = SRV_STATUS_INTERNAL; |
| 695 | goto out; |
| 696 | } |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 697 | |
| 698 | switch (s->be->lbprm.algo & BE_LB_PARM) { |
Christopher Faulet | a8e95fe | 2021-10-25 08:13:25 +0200 | [diff] [blame] | 699 | const struct sockaddr_storage *src; |
| 700 | |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 701 | case BE_LB_HASH_SRC: |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 702 | src = si_src(cs_si(s->csf)); |
Christopher Faulet | a8e95fe | 2021-10-25 08:13:25 +0200 | [diff] [blame] | 703 | if (src && src->ss_family == AF_INET) { |
Willy Tarreau | 5dd7fa1 | 2012-03-31 19:53:37 +0200 | [diff] [blame] | 704 | srv = get_server_sh(s->be, |
Christopher Faulet | a8e95fe | 2021-10-25 08:13:25 +0200 | [diff] [blame] | 705 | (void *)&((struct sockaddr_in *)src)->sin_addr, |
Willy Tarreau | 59884a6 | 2019-01-02 14:48:31 +0100 | [diff] [blame] | 706 | 4, prev_srv); |
Willy Tarreau | 5dd7fa1 | 2012-03-31 19:53:37 +0200 | [diff] [blame] | 707 | } |
Christopher Faulet | a8e95fe | 2021-10-25 08:13:25 +0200 | [diff] [blame] | 708 | else if (src && src->ss_family == AF_INET6) { |
Willy Tarreau | 5dd7fa1 | 2012-03-31 19:53:37 +0200 | [diff] [blame] | 709 | srv = get_server_sh(s->be, |
Christopher Faulet | a8e95fe | 2021-10-25 08:13:25 +0200 | [diff] [blame] | 710 | (void *)&((struct sockaddr_in6 *)src)->sin6_addr, |
Willy Tarreau | 59884a6 | 2019-01-02 14:48:31 +0100 | [diff] [blame] | 711 | 16, prev_srv); |
Willy Tarreau | 5dd7fa1 | 2012-03-31 19:53:37 +0200 | [diff] [blame] | 712 | } |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 713 | else { |
| 714 | /* unknown IP family */ |
| 715 | err = SRV_STATUS_INTERNAL; |
| 716 | goto out; |
| 717 | } |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 718 | break; |
| 719 | |
| 720 | case BE_LB_HASH_URI: |
| 721 | /* URI hashing */ |
Christopher Faulet | 7d37fbb | 2019-07-15 15:37:57 +0200 | [diff] [blame] | 722 | if (IS_HTX_STRM(s) && s->txn->req.msg_state >= HTTP_MSG_BODY) { |
Christopher Faulet | f7679ad | 2019-02-04 12:02:18 +0100 | [diff] [blame] | 723 | struct ist uri; |
| 724 | |
Christopher Faulet | 297fbb4 | 2019-05-13 14:41:27 +0200 | [diff] [blame] | 725 | uri = htx_sl_req_uri(http_get_stline(htxbuf(&s->req.buf))); |
Willy Tarreau | 57a3741 | 2020-09-23 08:56:29 +0200 | [diff] [blame] | 726 | if (s->be->lbprm.arg_opt1 & 2) { |
Amaury Denoyelle | c453f95 | 2021-07-06 11:40:12 +0200 | [diff] [blame] | 727 | struct http_uri_parser parser = |
| 728 | http_uri_parser_init(uri); |
| 729 | |
| 730 | uri = http_parse_path(&parser); |
Tim Duesterhus | 7b5777d | 2021-03-02 18:57:28 +0100 | [diff] [blame] | 731 | if (!isttest(uri)) |
Willy Tarreau | 57a3741 | 2020-09-23 08:56:29 +0200 | [diff] [blame] | 732 | uri = ist(""); |
| 733 | } |
Christopher Faulet | f7679ad | 2019-02-04 12:02:18 +0100 | [diff] [blame] | 734 | srv = get_server_uh(s->be, uri.ptr, uri.len, prev_srv); |
| 735 | } |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 736 | break; |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 737 | |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 738 | case BE_LB_HASH_PRM: |
| 739 | /* URL Parameter hashing */ |
Christopher Faulet | 7d37fbb | 2019-07-15 15:37:57 +0200 | [diff] [blame] | 740 | if (IS_HTX_STRM(s) && s->txn->req.msg_state >= HTTP_MSG_BODY) { |
Christopher Faulet | f7679ad | 2019-02-04 12:02:18 +0100 | [diff] [blame] | 741 | struct ist uri; |
| 742 | |
Christopher Faulet | 297fbb4 | 2019-05-13 14:41:27 +0200 | [diff] [blame] | 743 | uri = htx_sl_req_uri(http_get_stline(htxbuf(&s->req.buf))); |
Christopher Faulet | f7679ad | 2019-02-04 12:02:18 +0100 | [diff] [blame] | 744 | srv = get_server_ph(s->be, uri.ptr, uri.len, prev_srv); |
Willy Tarreau | 61a21a3 | 2011-03-01 20:35:49 +0100 | [diff] [blame] | 745 | |
Christopher Faulet | 7d37fbb | 2019-07-15 15:37:57 +0200 | [diff] [blame] | 746 | if (!srv && s->txn->meth == HTTP_METH_POST) |
| 747 | srv = get_server_ph_post(s, prev_srv); |
| 748 | } |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 749 | break; |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 750 | |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 751 | case BE_LB_HASH_HDR: |
| 752 | /* Header Parameter hashing */ |
Christopher Faulet | 7d37fbb | 2019-07-15 15:37:57 +0200 | [diff] [blame] | 753 | if (IS_HTX_STRM(s) && s->txn->req.msg_state >= HTTP_MSG_BODY) |
| 754 | srv = get_server_hh(s, prev_srv); |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 755 | break; |
| 756 | |
| 757 | case BE_LB_HASH_RDP: |
| 758 | /* RDP Cookie hashing */ |
Willy Tarreau | 59884a6 | 2019-01-02 14:48:31 +0100 | [diff] [blame] | 759 | srv = get_server_rch(s, prev_srv); |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 760 | break; |
| 761 | |
| 762 | default: |
| 763 | /* unknown balancing algorithm */ |
| 764 | err = SRV_STATUS_INTERNAL; |
| 765 | goto out; |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 766 | } |
Emeric Brun | 736aa23 | 2009-06-30 17:56:00 +0200 | [diff] [blame] | 767 | |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 768 | /* If the hashing parameter was not found, let's fall |
| 769 | * back to round robin on the map. |
| 770 | */ |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 771 | if (!srv) { |
Willy Tarreau | 6c30be5 | 2019-01-14 17:07:39 +0100 | [diff] [blame] | 772 | if ((s->be->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_CHTREE) |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 773 | srv = chash_get_next_server(s->be, prev_srv); |
Willy Tarreau | 6b2e11b | 2009-10-01 07:52:15 +0200 | [diff] [blame] | 774 | else |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 775 | srv = map_get_server_rr(s->be, prev_srv); |
Willy Tarreau | 6b2e11b | 2009-10-01 07:52:15 +0200 | [diff] [blame] | 776 | } |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 777 | |
| 778 | /* end of map-based LB */ |
Emeric Brun | 736aa23 | 2009-06-30 17:56:00 +0200 | [diff] [blame] | 779 | break; |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 780 | |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 781 | default: |
| 782 | /* unknown balancing algorithm */ |
| 783 | err = SRV_STATUS_INTERNAL; |
| 784 | goto out; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 785 | } |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 786 | |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 787 | if (!srv) { |
Willy Tarreau | da76f4f | 2009-10-03 12:36:05 +0200 | [diff] [blame] | 788 | err = SRV_STATUS_FULL; |
| 789 | goto out; |
| 790 | } |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 791 | else if (srv != prev_srv) { |
Willy Tarreau | 4781b15 | 2021-04-06 13:53:36 +0200 | [diff] [blame] | 792 | _HA_ATOMIC_INC(&s->be->be_counters.cum_lbconn); |
| 793 | _HA_ATOMIC_INC(&srv->counters.cum_lbconn); |
Alexandre Cassen | 5eb1a90 | 2007-11-29 15:43:32 +0100 | [diff] [blame] | 794 | } |
Willy Tarreau | 3fdb366 | 2012-11-12 00:42:33 +0100 | [diff] [blame] | 795 | s->target = &srv->obj_type; |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 796 | } |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 797 | else if (s->be->options & (PR_O_DISPATCH | PR_O_TRANSP)) { |
Willy Tarreau | 3fdb366 | 2012-11-12 00:42:33 +0100 | [diff] [blame] | 798 | s->target = &s->be->obj_type; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 799 | } |
Willy Tarreau | 664beb8 | 2011-03-10 11:38:29 +0100 | [diff] [blame] | 800 | else { |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 801 | err = SRV_STATUS_NOSRV; |
| 802 | goto out; |
| 803 | } |
| 804 | |
Olivier Houchard | 00cf70f | 2018-11-30 17:24:55 +0100 | [diff] [blame] | 805 | out_ok: |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 806 | s->flags |= SF_ASSIGNED; |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 807 | err = SRV_STATUS_OK; |
| 808 | out: |
| 809 | |
| 810 | /* Either we take back our connection slot, or we offer it to someone |
| 811 | * else if we don't need it anymore. |
| 812 | */ |
| 813 | if (conn_slot) { |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 814 | if (conn_slot == srv) { |
| 815 | sess_change_server(s, srv); |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 816 | } else { |
| 817 | if (may_dequeue_tasks(conn_slot, s->be)) |
Willy Tarreau | 9ab7829 | 2021-06-22 18:47:51 +0200 | [diff] [blame] | 818 | process_srv_queue(conn_slot); |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 819 | } |
| 820 | } |
| 821 | |
| 822 | out_err: |
| 823 | return err; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 824 | } |
| 825 | |
Amaury Denoyelle | 68cf395 | 2021-01-11 15:24:31 +0100 | [diff] [blame] | 826 | /* Allocate an address for the destination endpoint |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 827 | * The address is taken from the currently assigned server, or from the |
| 828 | * dispatch or transparent address. |
| 829 | * |
Amaury Denoyelle | 68cf395 | 2021-01-11 15:24:31 +0100 | [diff] [blame] | 830 | * Returns SRV_STATUS_OK on success. |
Amaury Denoyelle | f7bdf00 | 2021-01-21 09:40:19 +0100 | [diff] [blame] | 831 | * On error, no address is allocated and SRV_STATUS_INTERNAL is returned. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 832 | */ |
Amaury Denoyelle | 68cf395 | 2021-01-11 15:24:31 +0100 | [diff] [blame] | 833 | static int alloc_dst_address(struct sockaddr_storage **ss, |
| 834 | struct server *srv, struct stream *s) |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 835 | { |
Christopher Faulet | a8e95fe | 2021-10-25 08:13:25 +0200 | [diff] [blame] | 836 | const struct sockaddr_storage *dst; |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 837 | |
Amaury Denoyelle | 68cf395 | 2021-01-11 15:24:31 +0100 | [diff] [blame] | 838 | *ss = NULL; |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 839 | if ((s->flags & SF_DIRECT) || (s->be->lbprm.algo & BE_LB_KIND)) { |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 840 | /* A server is necessarily known for this stream */ |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 841 | if (!(s->flags & SF_ASSIGNED)) |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 842 | return SRV_STATUS_INTERNAL; |
| 843 | |
Amaury Denoyelle | 68cf395 | 2021-01-11 15:24:31 +0100 | [diff] [blame] | 844 | if (!sockaddr_alloc(ss, NULL, 0)) |
| 845 | return SRV_STATUS_INTERNAL; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 846 | |
Amaury Denoyelle | 68cf395 | 2021-01-11 15:24:31 +0100 | [diff] [blame] | 847 | **ss = srv->addr; |
| 848 | set_host_port(*ss, srv->svc_port); |
Christopher Faulet | 34a3eb4 | 2021-11-05 12:02:56 +0100 | [diff] [blame] | 849 | if (!is_addr(*ss)) { |
Willy Tarreau | d669a4f | 2010-07-13 14:49:50 +0200 | [diff] [blame] | 850 | /* if the server has no address, we use the same address |
| 851 | * the client asked, which is handy for remapping ports |
Willy Tarreau | 9cf8d3f | 2014-05-09 22:56:10 +0200 | [diff] [blame] | 852 | * locally on multiple addresses at once. Nothing is done |
| 853 | * for AF_UNIX addresses. |
Willy Tarreau | d669a4f | 2010-07-13 14:49:50 +0200 | [diff] [blame] | 854 | */ |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 855 | dst = si_dst(cs_si(s->csf)); |
Christopher Faulet | 34a3eb4 | 2021-11-05 12:02:56 +0100 | [diff] [blame] | 856 | if (dst && dst->ss_family == AF_INET) { |
Christopher Faulet | ae30561 | 2021-03-01 11:33:59 +0100 | [diff] [blame] | 857 | ((struct sockaddr_in *)*ss)->sin_family = AF_INET; |
Amaury Denoyelle | 68cf395 | 2021-01-11 15:24:31 +0100 | [diff] [blame] | 858 | ((struct sockaddr_in *)*ss)->sin_addr = |
Christopher Faulet | a8e95fe | 2021-10-25 08:13:25 +0200 | [diff] [blame] | 859 | ((struct sockaddr_in *)dst)->sin_addr; |
Christopher Faulet | 34a3eb4 | 2021-11-05 12:02:56 +0100 | [diff] [blame] | 860 | } else if (dst && dst->ss_family == AF_INET6) { |
Christopher Faulet | ae30561 | 2021-03-01 11:33:59 +0100 | [diff] [blame] | 861 | ((struct sockaddr_in6 *)*ss)->sin6_family = AF_INET6; |
Amaury Denoyelle | 68cf395 | 2021-01-11 15:24:31 +0100 | [diff] [blame] | 862 | ((struct sockaddr_in6 *)*ss)->sin6_addr = |
Christopher Faulet | a8e95fe | 2021-10-25 08:13:25 +0200 | [diff] [blame] | 863 | ((struct sockaddr_in6 *)dst)->sin6_addr; |
Emeric Brun | ec810d1 | 2010-10-22 16:36:33 +0200 | [diff] [blame] | 864 | } |
Willy Tarreau | d669a4f | 2010-07-13 14:49:50 +0200 | [diff] [blame] | 865 | } |
| 866 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 867 | /* if this server remaps proxied ports, we'll use |
| 868 | * the port the client connected to with an offset. */ |
Christopher Faulet | 34a3eb4 | 2021-11-05 12:02:56 +0100 | [diff] [blame] | 869 | if ((srv->flags & SRV_F_MAPPORTS)) { |
David du Colombier | 6f5ccb1 | 2011-03-10 22:26:24 +0100 | [diff] [blame] | 870 | int base_port; |
| 871 | |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 872 | dst = si_dst(cs_si(s->csf)); |
Christopher Faulet | 34a3eb4 | 2021-11-05 12:02:56 +0100 | [diff] [blame] | 873 | if (dst) { |
| 874 | /* First, retrieve the port from the incoming connection */ |
| 875 | base_port = get_host_port(dst); |
David du Colombier | 6f5ccb1 | 2011-03-10 22:26:24 +0100 | [diff] [blame] | 876 | |
Christopher Faulet | 34a3eb4 | 2021-11-05 12:02:56 +0100 | [diff] [blame] | 877 | /* Second, assign the outgoing connection's port */ |
| 878 | base_port += get_host_port(*ss); |
| 879 | set_host_port(*ss, base_port); |
| 880 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 881 | } |
| 882 | } |
Willy Tarreau | 1620ec3 | 2011-08-06 17:05:02 +0200 | [diff] [blame] | 883 | else if (s->be->options & PR_O_DISPATCH) { |
Amaury Denoyelle | 68cf395 | 2021-01-11 15:24:31 +0100 | [diff] [blame] | 884 | if (!sockaddr_alloc(ss, NULL, 0)) |
| 885 | return SRV_STATUS_INTERNAL; |
| 886 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 887 | /* connect to the defined dispatch addr */ |
Amaury Denoyelle | 68cf395 | 2021-01-11 15:24:31 +0100 | [diff] [blame] | 888 | **ss = s->be->dispatch_addr; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 889 | } |
Christopher Faulet | a8e95fe | 2021-10-25 08:13:25 +0200 | [diff] [blame] | 890 | else if ((s->be->options & PR_O_TRANSP)) { |
Christopher Faulet | 34a3eb4 | 2021-11-05 12:02:56 +0100 | [diff] [blame] | 891 | if (!sockaddr_alloc(ss, NULL, 0)) |
Amaury Denoyelle | 68cf395 | 2021-01-11 15:24:31 +0100 | [diff] [blame] | 892 | return SRV_STATUS_INTERNAL; |
| 893 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 894 | /* in transparent mode, use the original dest addr if no dispatch specified */ |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 895 | dst = si_dst(cs_si(s->csf)); |
Christopher Faulet | 34a3eb4 | 2021-11-05 12:02:56 +0100 | [diff] [blame] | 896 | if (dst && (dst->ss_family == AF_INET || dst->ss_family == AF_INET6)) |
Christopher Faulet | a8e95fe | 2021-10-25 08:13:25 +0200 | [diff] [blame] | 897 | **ss = *dst; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 898 | } |
Willy Tarreau | 1a1158b | 2007-01-20 11:07:46 +0100 | [diff] [blame] | 899 | else { |
| 900 | /* no server and no LB algorithm ! */ |
| 901 | return SRV_STATUS_INTERNAL; |
| 902 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 903 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 904 | return SRV_STATUS_OK; |
| 905 | } |
| 906 | |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 907 | /* This function assigns a server to stream <s> if required, and can add the |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 908 | * connection to either the assigned server's queue or to the proxy's queue. |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 909 | * If ->srv_conn is set, the stream is first released from the server. |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 910 | * It may also be called with SF_DIRECT and/or SF_ASSIGNED though. It will |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 911 | * be called before any connection and after any retry or redispatch occurs. |
| 912 | * |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 913 | * It is not allowed to call this function with a stream in a queue. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 914 | * |
| 915 | * Returns : |
| 916 | * |
| 917 | * SRV_STATUS_OK if everything is OK. |
Willy Tarreau | 3fdb366 | 2012-11-12 00:42:33 +0100 | [diff] [blame] | 918 | * SRV_STATUS_NOSRV if no server is available. objt_server(s->target) = NULL. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 919 | * SRV_STATUS_QUEUED if the connection has been queued. |
| 920 | * SRV_STATUS_FULL if the server(s) is/are saturated and the |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 921 | * connection could not be queued at the server's, |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 922 | * which may be NULL if we queue on the backend. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 923 | * SRV_STATUS_INTERNAL for other unrecoverable errors. |
| 924 | * |
| 925 | */ |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 926 | int assign_server_and_queue(struct stream *s) |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 927 | { |
| 928 | struct pendconn *p; |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 929 | struct server *srv; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 930 | int err; |
| 931 | |
| 932 | if (s->pend_pos) |
| 933 | return SRV_STATUS_INTERNAL; |
| 934 | |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 935 | err = SRV_STATUS_OK; |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 936 | if (!(s->flags & SF_ASSIGNED)) { |
Willy Tarreau | 3fdb366 | 2012-11-12 00:42:33 +0100 | [diff] [blame] | 937 | struct server *prev_srv = objt_server(s->target); |
Willy Tarreau | 3d80d91 | 2011-03-10 11:42:13 +0100 | [diff] [blame] | 938 | |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 939 | err = assign_server(s); |
Willy Tarreau | 3d80d91 | 2011-03-10 11:42:13 +0100 | [diff] [blame] | 940 | if (prev_srv) { |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 941 | /* This stream was previously assigned to a server. We have to |
| 942 | * update the stream's and the server's stats : |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 943 | * - if the server changed : |
| 944 | * - set TX_CK_DOWN if txn.flags was TX_CK_VALID |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 945 | * - set SF_REDISP if it was successfully redispatched |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 946 | * - increment srv->redispatches and be->redispatches |
| 947 | * - if the server remained the same : update retries. |
Krzysztof Piotr Oledzki | 5a329cf | 2008-02-22 03:50:19 +0100 | [diff] [blame] | 948 | */ |
| 949 | |
Willy Tarreau | 3fdb366 | 2012-11-12 00:42:33 +0100 | [diff] [blame] | 950 | if (prev_srv != objt_server(s->target)) { |
Willy Tarreau | eee5b51 | 2015-04-03 23:46:31 +0200 | [diff] [blame] | 951 | if (s->txn && (s->txn->flags & TX_CK_MASK) == TX_CK_VALID) { |
| 952 | s->txn->flags &= ~TX_CK_MASK; |
| 953 | s->txn->flags |= TX_CK_DOWN; |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 954 | } |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 955 | s->flags |= SF_REDISP; |
Willy Tarreau | 4781b15 | 2021-04-06 13:53:36 +0200 | [diff] [blame] | 956 | _HA_ATOMIC_INC(&prev_srv->counters.redispatches); |
| 957 | _HA_ATOMIC_INC(&s->be->be_counters.redispatches); |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 958 | } else { |
Willy Tarreau | 4781b15 | 2021-04-06 13:53:36 +0200 | [diff] [blame] | 959 | _HA_ATOMIC_INC(&prev_srv->counters.retries); |
| 960 | _HA_ATOMIC_INC(&s->be->be_counters.retries); |
Krzysztof Piotr Oledzki | 5a329cf | 2008-02-22 03:50:19 +0100 | [diff] [blame] | 961 | } |
Krzysztof Piotr Oledzki | 5a329cf | 2008-02-22 03:50:19 +0100 | [diff] [blame] | 962 | } |
| 963 | } |
| 964 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 965 | switch (err) { |
| 966 | case SRV_STATUS_OK: |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 967 | /* we have SF_ASSIGNED set */ |
Willy Tarreau | 3fdb366 | 2012-11-12 00:42:33 +0100 | [diff] [blame] | 968 | srv = objt_server(s->target); |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 969 | if (!srv) |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 970 | return SRV_STATUS_OK; /* dispatch or proxy mode */ |
| 971 | |
| 972 | /* If we already have a connection slot, no need to check any queue */ |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 973 | if (s->srv_conn == srv) |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 974 | return SRV_STATUS_OK; |
| 975 | |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 976 | /* OK, this stream already has an assigned server, but no |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 977 | * connection slot yet. Either it is a redispatch, or it was |
| 978 | * assigned from persistence information (direct mode). |
| 979 | */ |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 980 | if ((s->flags & SF_REDIRECTABLE) && srv->rdr_len) { |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 981 | /* server scheduled for redirection, and already assigned. We |
| 982 | * don't want to go further nor check the queue. |
Willy Tarreau | 21d2af3 | 2008-02-14 20:25:24 +0100 | [diff] [blame] | 983 | */ |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 984 | sess_change_server(s, srv); /* not really needed in fact */ |
Willy Tarreau | 21d2af3 | 2008-02-14 20:25:24 +0100 | [diff] [blame] | 985 | return SRV_STATUS_OK; |
| 986 | } |
| 987 | |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 988 | /* We might have to queue this stream if the assigned server is full. |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 989 | * We know we have to queue it into the server's queue, so if a maxqueue |
| 990 | * is set on the server, we must also check that the server's queue is |
| 991 | * not full, in which case we have to return FULL. |
| 992 | */ |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 993 | if (srv->maxconn && |
Willy Tarreau | a057045 | 2021-06-18 09:30:30 +0200 | [diff] [blame] | 994 | (srv->queue.length || srv->served >= srv_dynamic_maxconn(srv))) { |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 995 | |
Willy Tarreau | a057045 | 2021-06-18 09:30:30 +0200 | [diff] [blame] | 996 | if (srv->maxqueue > 0 && srv->queue.length >= srv->maxqueue) |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 997 | return SRV_STATUS_FULL; |
| 998 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 999 | p = pendconn_add(s); |
| 1000 | if (p) |
| 1001 | return SRV_STATUS_QUEUED; |
| 1002 | else |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 1003 | return SRV_STATUS_INTERNAL; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1004 | } |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 1005 | |
| 1006 | /* OK, we can use this server. Let's reserve our place */ |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 1007 | sess_change_server(s, srv); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1008 | return SRV_STATUS_OK; |
| 1009 | |
| 1010 | case SRV_STATUS_FULL: |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 1011 | /* queue this stream into the proxy's queue */ |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1012 | p = pendconn_add(s); |
| 1013 | if (p) |
| 1014 | return SRV_STATUS_QUEUED; |
| 1015 | else |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 1016 | return SRV_STATUS_INTERNAL; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1017 | |
| 1018 | case SRV_STATUS_NOSRV: |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 1019 | return err; |
| 1020 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1021 | case SRV_STATUS_INTERNAL: |
| 1022 | return err; |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 1023 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1024 | default: |
| 1025 | return SRV_STATUS_INTERNAL; |
| 1026 | } |
Willy Tarreau | 5b6995c | 2008-01-13 16:31:17 +0100 | [diff] [blame] | 1027 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1028 | |
Amaury Denoyelle | f7bdf00 | 2021-01-21 09:40:19 +0100 | [diff] [blame] | 1029 | /* Allocate an address for source binding on the specified server or backend. |
| 1030 | * The allocation is only performed if the connection is intended to be used |
| 1031 | * with transparent mode. |
| 1032 | * |
| 1033 | * Returns SRV_STATUS_OK if no transparent mode or the address was successfully |
| 1034 | * allocated. Otherwise returns SRV_STATUS_INTERNAL. |
Willy Tarreau | b1d6774 | 2010-03-29 19:36:59 +0200 | [diff] [blame] | 1035 | */ |
Amaury Denoyelle | f7bdf00 | 2021-01-21 09:40:19 +0100 | [diff] [blame] | 1036 | static int alloc_bind_address(struct sockaddr_storage **ss, |
| 1037 | struct server *srv, struct stream *s) |
Willy Tarreau | b1d6774 | 2010-03-29 19:36:59 +0200 | [diff] [blame] | 1038 | { |
Willy Tarreau | 29fbe51 | 2015-08-20 19:35:14 +0200 | [diff] [blame] | 1039 | #if defined(CONFIG_HAP_TRANSPARENT) |
Christopher Faulet | a8e95fe | 2021-10-25 08:13:25 +0200 | [diff] [blame] | 1040 | const struct sockaddr_storage *addr; |
Amaury Denoyelle | f7bdf00 | 2021-01-21 09:40:19 +0100 | [diff] [blame] | 1041 | struct conn_src *src = NULL; |
Amaury Denoyelle | f7bdf00 | 2021-01-21 09:40:19 +0100 | [diff] [blame] | 1042 | struct sockaddr_in *sin; |
| 1043 | char *vptr; |
| 1044 | size_t vlen; |
| 1045 | #endif |
Olivier Houchard | 09a0f03 | 2019-01-17 15:59:13 +0100 | [diff] [blame] | 1046 | |
Amaury Denoyelle | f7bdf00 | 2021-01-21 09:40:19 +0100 | [diff] [blame] | 1047 | *ss = NULL; |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 1048 | |
Amaury Denoyelle | f7bdf00 | 2021-01-21 09:40:19 +0100 | [diff] [blame] | 1049 | #if defined(CONFIG_HAP_TRANSPARENT) |
Willy Tarreau | 9cd7d6c | 2012-12-08 23:13:33 +0100 | [diff] [blame] | 1050 | if (srv && srv->conn_src.opts & CO_SRC_BIND) |
| 1051 | src = &srv->conn_src; |
| 1052 | else if (s->be->conn_src.opts & CO_SRC_BIND) |
| 1053 | src = &s->be->conn_src; |
Willy Tarreau | 294c473 | 2011-12-16 21:35:50 +0100 | [diff] [blame] | 1054 | |
Amaury Denoyelle | f7bdf00 | 2021-01-21 09:40:19 +0100 | [diff] [blame] | 1055 | /* no transparent mode, no need to allocate an address, returns OK */ |
| 1056 | if (!src) |
| 1057 | return SRV_STATUS_OK; |
Willy Tarreau | c0e16f2 | 2019-07-17 18:16:30 +0200 | [diff] [blame] | 1058 | |
Willy Tarreau | 9cd7d6c | 2012-12-08 23:13:33 +0100 | [diff] [blame] | 1059 | switch (src->opts & CO_SRC_TPROXY_MASK) { |
| 1060 | case CO_SRC_TPROXY_ADDR: |
Amaury Denoyelle | f7bdf00 | 2021-01-21 09:40:19 +0100 | [diff] [blame] | 1061 | if (!sockaddr_alloc(ss, NULL, 0)) |
| 1062 | return SRV_STATUS_INTERNAL; |
| 1063 | |
| 1064 | **ss = src->tproxy_addr; |
Willy Tarreau | 9cd7d6c | 2012-12-08 23:13:33 +0100 | [diff] [blame] | 1065 | break; |
Amaury Denoyelle | f7bdf00 | 2021-01-21 09:40:19 +0100 | [diff] [blame] | 1066 | |
Willy Tarreau | 9cd7d6c | 2012-12-08 23:13:33 +0100 | [diff] [blame] | 1067 | case CO_SRC_TPROXY_CLI: |
| 1068 | case CO_SRC_TPROXY_CIP: |
| 1069 | /* FIXME: what can we do if the client connects in IPv6 or unix socket ? */ |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1070 | addr = si_src(cs_si(s->csf)); |
Christopher Faulet | a8e95fe | 2021-10-25 08:13:25 +0200 | [diff] [blame] | 1071 | if (!addr) |
Amaury Denoyelle | f7bdf00 | 2021-01-21 09:40:19 +0100 | [diff] [blame] | 1072 | return SRV_STATUS_INTERNAL; |
| 1073 | |
| 1074 | if (!sockaddr_alloc(ss, NULL, 0)) |
| 1075 | return SRV_STATUS_INTERNAL; |
| 1076 | |
Christopher Faulet | a8e95fe | 2021-10-25 08:13:25 +0200 | [diff] [blame] | 1077 | **ss = *addr; |
Willy Tarreau | 9cd7d6c | 2012-12-08 23:13:33 +0100 | [diff] [blame] | 1078 | break; |
Amaury Denoyelle | f7bdf00 | 2021-01-21 09:40:19 +0100 | [diff] [blame] | 1079 | |
Willy Tarreau | 9cd7d6c | 2012-12-08 23:13:33 +0100 | [diff] [blame] | 1080 | case CO_SRC_TPROXY_DYN: |
Amaury Denoyelle | f7bdf00 | 2021-01-21 09:40:19 +0100 | [diff] [blame] | 1081 | if (!src->bind_hdr_occ || !IS_HTX_STRM(s)) |
| 1082 | return SRV_STATUS_INTERNAL; |
Willy Tarreau | 294c473 | 2011-12-16 21:35:50 +0100 | [diff] [blame] | 1083 | |
Amaury Denoyelle | f7bdf00 | 2021-01-21 09:40:19 +0100 | [diff] [blame] | 1084 | if (!sockaddr_alloc(ss, NULL, 0)) |
| 1085 | return SRV_STATUS_INTERNAL; |
| 1086 | |
| 1087 | /* bind to the IP in a header */ |
| 1088 | sin = (struct sockaddr_in *)*ss; |
| 1089 | sin->sin_family = AF_INET; |
| 1090 | sin->sin_port = 0; |
| 1091 | sin->sin_addr.s_addr = 0; |
| 1092 | if (!http_get_htx_hdr(htxbuf(&s->req.buf), |
| 1093 | ist2(src->bind_hdr_name, src->bind_hdr_len), |
| 1094 | src->bind_hdr_occ, NULL, &vptr, &vlen)) { |
| 1095 | sockaddr_free(ss); |
| 1096 | return SRV_STATUS_INTERNAL; |
Willy Tarreau | b1d6774 | 2010-03-29 19:36:59 +0200 | [diff] [blame] | 1097 | } |
Amaury Denoyelle | f7bdf00 | 2021-01-21 09:40:19 +0100 | [diff] [blame] | 1098 | |
| 1099 | sin->sin_addr.s_addr = htonl(inetaddr_host_lim(vptr, vptr + vlen)); |
Willy Tarreau | 9cd7d6c | 2012-12-08 23:13:33 +0100 | [diff] [blame] | 1100 | break; |
Amaury Denoyelle | f7bdf00 | 2021-01-21 09:40:19 +0100 | [diff] [blame] | 1101 | |
Willy Tarreau | 9cd7d6c | 2012-12-08 23:13:33 +0100 | [diff] [blame] | 1102 | default: |
Amaury Denoyelle | f7bdf00 | 2021-01-21 09:40:19 +0100 | [diff] [blame] | 1103 | ; |
Willy Tarreau | b1d6774 | 2010-03-29 19:36:59 +0200 | [diff] [blame] | 1104 | } |
| 1105 | #endif |
Amaury Denoyelle | f7bdf00 | 2021-01-21 09:40:19 +0100 | [diff] [blame] | 1106 | |
| 1107 | return SRV_STATUS_OK; |
Willy Tarreau | b1d6774 | 2010-03-29 19:36:59 +0200 | [diff] [blame] | 1108 | } |
| 1109 | |
Olivier Houchard | 566df30 | 2020-03-06 18:18:56 +0100 | [diff] [blame] | 1110 | /* Attempt to get a backend connection from the specified mt_list array |
Willy Tarreau | 0d58711 | 2020-07-01 15:04:38 +0200 | [diff] [blame] | 1111 | * (safe or idle connections). The <is_safe> argument means what type of |
| 1112 | * connection the caller wants. |
Olivier Houchard | 566df30 | 2020-03-06 18:18:56 +0100 | [diff] [blame] | 1113 | */ |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1114 | static struct connection *conn_backend_get(struct stream *s, struct server *srv, int is_safe, int64_t hash) |
Olivier Houchard | 566df30 | 2020-03-06 18:18:56 +0100 | [diff] [blame] | 1115 | { |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1116 | struct connection *conn = NULL; |
Willy Tarreau | 2f3f4d3 | 2020-07-01 07:43:51 +0200 | [diff] [blame] | 1117 | int i; // thread number |
Olivier Houchard | 566df30 | 2020-03-06 18:18:56 +0100 | [diff] [blame] | 1118 | int found = 0; |
Willy Tarreau | 364f25a | 2020-07-01 15:55:30 +0200 | [diff] [blame] | 1119 | int stop; |
Olivier Houchard | 566df30 | 2020-03-06 18:18:56 +0100 | [diff] [blame] | 1120 | |
| 1121 | /* We need to lock even if this is our own list, because another |
| 1122 | * thread may be trying to migrate that connection, and we don't want |
| 1123 | * to end up with two threads using the same connection. |
| 1124 | */ |
Willy Tarreau | 2f3f4d3 | 2020-07-01 07:43:51 +0200 | [diff] [blame] | 1125 | i = tid; |
Amaury Denoyelle | 5c7086f | 2021-01-11 09:21:52 +0100 | [diff] [blame] | 1126 | HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock); |
Willy Tarreau | 430bf4a | 2021-03-04 09:45:32 +0100 | [diff] [blame] | 1127 | conn = srv_lookup_conn(is_safe ? &srv->per_thr[tid].safe_conns : &srv->per_thr[tid].idle_conns, hash); |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1128 | if (conn) |
Amaury Denoyelle | 8990b01 | 2021-02-19 15:29:16 +0100 | [diff] [blame] | 1129 | conn_delete_from_tree(&conn->hash_node->node); |
Willy Tarreau | 0d58711 | 2020-07-01 15:04:38 +0200 | [diff] [blame] | 1130 | |
| 1131 | /* If we failed to pick a connection from the idle list, let's try again with |
| 1132 | * the safe list. |
| 1133 | */ |
| 1134 | if (!conn && !is_safe && srv->curr_safe_nb > 0) { |
Willy Tarreau | 430bf4a | 2021-03-04 09:45:32 +0100 | [diff] [blame] | 1135 | conn = srv_lookup_conn(&srv->per_thr[tid].safe_conns, hash); |
Willy Tarreau | 0d58711 | 2020-07-01 15:04:38 +0200 | [diff] [blame] | 1136 | if (conn) { |
Amaury Denoyelle | 8990b01 | 2021-02-19 15:29:16 +0100 | [diff] [blame] | 1137 | conn_delete_from_tree(&conn->hash_node->node); |
Willy Tarreau | 0d58711 | 2020-07-01 15:04:38 +0200 | [diff] [blame] | 1138 | is_safe = 1; |
Willy Tarreau | 0d58711 | 2020-07-01 15:04:38 +0200 | [diff] [blame] | 1139 | } |
| 1140 | } |
Amaury Denoyelle | 5c7086f | 2021-01-11 09:21:52 +0100 | [diff] [blame] | 1141 | HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock); |
Olivier Houchard | 566df30 | 2020-03-06 18:18:56 +0100 | [diff] [blame] | 1142 | |
| 1143 | /* If we found a connection in our own list, and we don't have to |
| 1144 | * steal one from another thread, then we're done. |
| 1145 | */ |
Willy Tarreau | 2f3f4d3 | 2020-07-01 07:43:51 +0200 | [diff] [blame] | 1146 | if (conn) |
| 1147 | goto done; |
| 1148 | |
Willy Tarreau | 76cc699 | 2020-07-01 18:49:24 +0200 | [diff] [blame] | 1149 | /* pool sharing globally disabled ? */ |
| 1150 | if (!(global.tune.options & GTUNE_IDLE_POOL_SHARED)) |
| 1151 | goto done; |
| 1152 | |
Willy Tarreau | 2f3f4d3 | 2020-07-01 07:43:51 +0200 | [diff] [blame] | 1153 | /* Are we allowed to pick from another thread ? We'll still try |
| 1154 | * it if we're running low on FDs as we don't want to create |
| 1155 | * extra conns in this case, otherwise we can give up if we have |
| 1156 | * too few idle conns. |
| 1157 | */ |
| 1158 | if (srv->curr_idle_conns < srv->low_idle_conns && |
| 1159 | ha_used_fds < global.tune.pool_low_count) |
| 1160 | goto done; |
Olivier Houchard | 566df30 | 2020-03-06 18:18:56 +0100 | [diff] [blame] | 1161 | |
Willy Tarreau | 364f25a | 2020-07-01 15:55:30 +0200 | [diff] [blame] | 1162 | /* Lookup all other threads for an idle connection, starting from last |
| 1163 | * unvisited thread. |
| 1164 | */ |
| 1165 | stop = srv->next_takeover; |
| 1166 | if (stop >= global.nbthread) |
| 1167 | stop = 0; |
| 1168 | |
Amaury Denoyelle | 5f1ded5 | 2020-10-14 18:17:03 +0200 | [diff] [blame] | 1169 | i = stop; |
| 1170 | do { |
Willy Tarreau | 364f25a | 2020-07-01 15:55:30 +0200 | [diff] [blame] | 1171 | if (!srv->curr_idle_thr[i] || i == tid) |
Willy Tarreau | 151c253 | 2020-07-01 08:24:44 +0200 | [diff] [blame] | 1172 | continue; |
| 1173 | |
Ubuntu | b1adf03 | 2021-03-01 06:22:17 +0000 | [diff] [blame] | 1174 | if (HA_SPIN_TRYLOCK(IDLE_CONNS_LOCK, &idle_conns[i].idle_conns_lock) != 0) |
| 1175 | continue; |
Willy Tarreau | 430bf4a | 2021-03-04 09:45:32 +0100 | [diff] [blame] | 1176 | conn = srv_lookup_conn(is_safe ? &srv->per_thr[i].safe_conns : &srv->per_thr[i].idle_conns, hash); |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1177 | while (conn) { |
Olivier Houchard | 1662cdb | 2020-07-03 14:04:37 +0200 | [diff] [blame] | 1178 | if (conn->mux->takeover && conn->mux->takeover(conn, i) == 0) { |
Amaury Denoyelle | 8990b01 | 2021-02-19 15:29:16 +0100 | [diff] [blame] | 1179 | conn_delete_from_tree(&conn->hash_node->node); |
Willy Tarreau | 4781b15 | 2021-04-06 13:53:36 +0200 | [diff] [blame] | 1180 | _HA_ATOMIC_INC(&activity[tid].fd_takeover); |
Olivier Houchard | 566df30 | 2020-03-06 18:18:56 +0100 | [diff] [blame] | 1181 | found = 1; |
| 1182 | break; |
| 1183 | } |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1184 | |
| 1185 | conn = srv_lookup_conn_next(conn); |
Olivier Houchard | 566df30 | 2020-03-06 18:18:56 +0100 | [diff] [blame] | 1186 | } |
Willy Tarreau | 0d58711 | 2020-07-01 15:04:38 +0200 | [diff] [blame] | 1187 | |
| 1188 | if (!found && !is_safe && srv->curr_safe_nb > 0) { |
Willy Tarreau | 430bf4a | 2021-03-04 09:45:32 +0100 | [diff] [blame] | 1189 | conn = srv_lookup_conn(&srv->per_thr[i].safe_conns, hash); |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1190 | while (conn) { |
Olivier Houchard | 1662cdb | 2020-07-03 14:04:37 +0200 | [diff] [blame] | 1191 | if (conn->mux->takeover && conn->mux->takeover(conn, i) == 0) { |
Amaury Denoyelle | 8990b01 | 2021-02-19 15:29:16 +0100 | [diff] [blame] | 1192 | conn_delete_from_tree(&conn->hash_node->node); |
Willy Tarreau | 4781b15 | 2021-04-06 13:53:36 +0200 | [diff] [blame] | 1193 | _HA_ATOMIC_INC(&activity[tid].fd_takeover); |
Willy Tarreau | 0d58711 | 2020-07-01 15:04:38 +0200 | [diff] [blame] | 1194 | found = 1; |
| 1195 | is_safe = 1; |
Willy Tarreau | 0d58711 | 2020-07-01 15:04:38 +0200 | [diff] [blame] | 1196 | break; |
| 1197 | } |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1198 | |
| 1199 | conn = srv_lookup_conn_next(conn); |
Willy Tarreau | 0d58711 | 2020-07-01 15:04:38 +0200 | [diff] [blame] | 1200 | } |
| 1201 | } |
Amaury Denoyelle | 5c7086f | 2021-01-11 09:21:52 +0100 | [diff] [blame] | 1202 | HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[i].idle_conns_lock); |
Amaury Denoyelle | 5f1ded5 | 2020-10-14 18:17:03 +0200 | [diff] [blame] | 1203 | } while (!found && (i = (i + 1 == global.nbthread) ? 0 : i + 1) != stop); |
Olivier Houchard | 566df30 | 2020-03-06 18:18:56 +0100 | [diff] [blame] | 1204 | |
| 1205 | if (!found) |
| 1206 | conn = NULL; |
Willy Tarreau | 2f3f4d3 | 2020-07-01 07:43:51 +0200 | [diff] [blame] | 1207 | done: |
| 1208 | if (conn) { |
Willy Tarreau | 364f25a | 2020-07-01 15:55:30 +0200 | [diff] [blame] | 1209 | _HA_ATOMIC_STORE(&srv->next_takeover, (i + 1 == global.nbthread) ? 0 : i + 1); |
Amaury Denoyelle | 9c13b62 | 2020-10-14 18:17:04 +0200 | [diff] [blame] | 1210 | |
| 1211 | srv_use_conn(srv, conn); |
| 1212 | |
Willy Tarreau | 4781b15 | 2021-04-06 13:53:36 +0200 | [diff] [blame] | 1213 | _HA_ATOMIC_DEC(&srv->curr_idle_conns); |
| 1214 | _HA_ATOMIC_DEC(conn->flags & CO_FL_SAFE_LIST ? &srv->curr_safe_nb : &srv->curr_idle_nb); |
| 1215 | _HA_ATOMIC_DEC(&srv->curr_idle_thr[i]); |
Amaury Denoyelle | 9c13b62 | 2020-10-14 18:17:04 +0200 | [diff] [blame] | 1216 | conn->flags &= ~CO_FL_LIST_MASK; |
| 1217 | __ha_barrier_atomic_store(); |
| 1218 | |
Amaury Denoyelle | 0d21dea | 2020-10-14 18:17:09 +0200 | [diff] [blame] | 1219 | if ((s->be->options & PR_O_REUSE_MASK) == PR_O_REUSE_SAFE && |
| 1220 | conn->mux->flags & MX_FL_HOL_RISK) { |
| 1221 | /* attach the connection to the session private list |
| 1222 | */ |
| 1223 | conn->owner = s->sess; |
Willy Tarreau | 38b4d2e | 2020-11-20 17:08:15 +0100 | [diff] [blame] | 1224 | session_add_conn(s->sess, conn, conn->target); |
Amaury Denoyelle | 0d21dea | 2020-10-14 18:17:09 +0200 | [diff] [blame] | 1225 | } |
| 1226 | else { |
Willy Tarreau | 430bf4a | 2021-03-04 09:45:32 +0100 | [diff] [blame] | 1227 | ebmb_insert(&srv->per_thr[tid].avail_conns, |
Amaury Denoyelle | 8990b01 | 2021-02-19 15:29:16 +0100 | [diff] [blame] | 1228 | &conn->hash_node->node, |
| 1229 | sizeof(conn->hash_node->hash)); |
Amaury Denoyelle | 0d21dea | 2020-10-14 18:17:09 +0200 | [diff] [blame] | 1230 | } |
Olivier Houchard | 566df30 | 2020-03-06 18:18:56 +0100 | [diff] [blame] | 1231 | } |
| 1232 | return conn; |
| 1233 | } |
| 1234 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1235 | /* |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 1236 | * This function initiates a connection to the server assigned to this stream |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1237 | * (s->target, (s->csb->si)->addr.to). It will assign a server if none |
Willy Tarreau | 664beb8 | 2011-03-10 11:38:29 +0100 | [diff] [blame] | 1238 | * is assigned yet. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1239 | * It can return one of : |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 1240 | * - SF_ERR_NONE if everything's OK |
| 1241 | * - SF_ERR_SRVTO if there are no more servers |
| 1242 | * - SF_ERR_SRVCL if the connection was refused by the server |
| 1243 | * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn) |
| 1244 | * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...) |
| 1245 | * - SF_ERR_INTERNAL for any other purely internal errors |
Tim Düsterhus | 4896c44 | 2016-11-29 02:15:19 +0100 | [diff] [blame] | 1246 | * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted. |
Willy Tarreau | b363a1f | 2013-10-01 10:45:07 +0200 | [diff] [blame] | 1247 | * The server-facing stream interface is expected to hold a pre-allocated connection |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1248 | * in s->csb->si->conn. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1249 | */ |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 1250 | int connect_server(struct stream *s) |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1251 | { |
Willy Tarreau | 1c8d32b | 2019-07-18 15:47:45 +0200 | [diff] [blame] | 1252 | struct connection *cli_conn = objt_conn(strm_orig(s)); |
Olivier Houchard | 00cf70f | 2018-11-30 17:24:55 +0100 | [diff] [blame] | 1253 | struct connection *srv_conn = NULL; |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 1254 | struct server *srv; |
Amaury Denoyelle | 7f68d81 | 2021-01-26 14:35:26 +0100 | [diff] [blame] | 1255 | const int reuse_mode = s->be->options & PR_O_REUSE_MASK; |
Willy Tarreau | 34601a8 | 2013-12-15 16:33:46 +0100 | [diff] [blame] | 1256 | int reuse = 0; |
Olivier Houchard | 5cd6217 | 2019-01-04 15:52:26 +0100 | [diff] [blame] | 1257 | int init_mux = 0; |
Willy Tarreau | 9650f37 | 2009-08-16 14:02:45 +0200 | [diff] [blame] | 1258 | int err; |
Amaury Denoyelle | edadf19 | 2021-02-12 13:49:42 +0100 | [diff] [blame] | 1259 | #ifdef USE_OPENSSL |
Amaury Denoyelle | 9b626e3 | 2021-01-06 17:03:27 +0100 | [diff] [blame] | 1260 | struct sample *sni_smp = NULL; |
Amaury Denoyelle | edadf19 | 2021-02-12 13:49:42 +0100 | [diff] [blame] | 1261 | #endif |
Amaury Denoyelle | d10a200 | 2021-02-11 19:45:19 +0100 | [diff] [blame] | 1262 | struct sockaddr_storage *bind_addr; |
Amaury Denoyelle | 1921d20 | 2021-01-14 10:15:29 +0100 | [diff] [blame] | 1263 | int proxy_line_ret; |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1264 | int64_t hash = 0; |
Amaury Denoyelle | 81c6f76 | 2021-01-18 14:57:50 +0100 | [diff] [blame] | 1265 | struct conn_hash_params hash_params; |
| 1266 | |
Amaury Denoyelle | 8ede3db | 2021-03-02 14:38:53 +0100 | [diff] [blame] | 1267 | /* in standard configuration, srv will be valid |
| 1268 | * it can be NULL for dispatch mode or transparent backend */ |
| 1269 | srv = objt_server(s->target); |
| 1270 | |
Amaury Denoyelle | 926712a | 2021-10-20 15:04:03 +0200 | [diff] [blame] | 1271 | if (!(s->flags & SF_ADDR_SET)) { |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1272 | err = alloc_dst_address(&(cs_si(s->csb)->dst), srv, s); |
Amaury Denoyelle | 926712a | 2021-10-20 15:04:03 +0200 | [diff] [blame] | 1273 | if (err != SRV_STATUS_OK) |
| 1274 | return SF_ERR_INTERNAL; |
Amaury Denoyelle | 1a58aca | 2021-01-22 16:47:46 +0100 | [diff] [blame] | 1275 | |
Amaury Denoyelle | 926712a | 2021-10-20 15:04:03 +0200 | [diff] [blame] | 1276 | s->flags |= SF_ADDR_SET; |
| 1277 | } |
| 1278 | |
| 1279 | err = alloc_bind_address(&bind_addr, srv, s); |
| 1280 | if (err != SRV_STATUS_OK) |
| 1281 | return SF_ERR_INTERNAL; |
Amaury Denoyelle | 1a58aca | 2021-01-22 16:47:46 +0100 | [diff] [blame] | 1282 | |
Amaury Denoyelle | 9b626e3 | 2021-01-06 17:03:27 +0100 | [diff] [blame] | 1283 | #ifdef USE_OPENSSL |
Amaury Denoyelle | 9b626e3 | 2021-01-06 17:03:27 +0100 | [diff] [blame] | 1284 | if (srv && srv->ssl_ctx.sni) { |
| 1285 | sni_smp = sample_fetch_as_type(s->be, s->sess, s, |
| 1286 | SMP_OPT_DIR_REQ | SMP_OPT_FINAL, |
| 1287 | srv->ssl_ctx.sni, SMP_T_STR); |
Amaury Denoyelle | 926712a | 2021-10-20 15:04:03 +0200 | [diff] [blame] | 1288 | } |
| 1289 | #endif |
Amaury Denoyelle | 4c09800 | 2021-02-17 15:59:02 +0100 | [diff] [blame] | 1290 | |
Amaury Denoyelle | 926712a | 2021-10-20 15:04:03 +0200 | [diff] [blame] | 1291 | /* do not reuse if mode is not http */ |
| 1292 | if (!IS_HTX_STRM(s)) { |
| 1293 | DBG_TRACE_STATE("skip idle connections reuse: no htx", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 1294 | goto skip_reuse; |
Amaury Denoyelle | 9b626e3 | 2021-01-06 17:03:27 +0100 | [diff] [blame] | 1295 | } |
Amaury Denoyelle | 9b626e3 | 2021-01-06 17:03:27 +0100 | [diff] [blame] | 1296 | |
Amaury Denoyelle | 9c3251d | 2021-10-18 14:39:57 +0200 | [diff] [blame] | 1297 | /* disable reuse if websocket stream and the protocol to use is not the |
| 1298 | * same as the main protocol of the server. |
| 1299 | */ |
| 1300 | if (unlikely(s->flags & SF_WEBSOCKET) && srv) { |
| 1301 | if (!srv_check_reuse_ws(srv)) { |
| 1302 | DBG_TRACE_STATE("skip idle connections reuse: websocket stream", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 1303 | goto skip_reuse; |
| 1304 | } |
| 1305 | } |
| 1306 | |
Amaury Denoyelle | 926712a | 2021-10-20 15:04:03 +0200 | [diff] [blame] | 1307 | /* first, set unique connection parameters and then calculate hash */ |
| 1308 | memset(&hash_params, 0, sizeof(hash_params)); |
Amaury Denoyelle | 01a287f | 2021-02-11 16:46:53 +0100 | [diff] [blame] | 1309 | |
Amaury Denoyelle | 926712a | 2021-10-20 15:04:03 +0200 | [diff] [blame] | 1310 | /* 1. target */ |
| 1311 | hash_params.target = s->target; |
| 1312 | |
| 1313 | #ifdef USE_OPENSSL |
| 1314 | /* 2. sni |
| 1315 | * only test if the sample is not null as smp_make_safe (called before |
| 1316 | * ssl_sock_set_servername) can only fails if this is not the case |
| 1317 | */ |
| 1318 | if (sni_smp) { |
| 1319 | hash_params.sni_prehash = |
| 1320 | conn_hash_prehash(sni_smp->data.u.str.area, |
| 1321 | sni_smp->data.u.str.data); |
Amaury Denoyelle | 01a287f | 2021-02-11 16:46:53 +0100 | [diff] [blame] | 1322 | } |
Amaury Denoyelle | 926712a | 2021-10-20 15:04:03 +0200 | [diff] [blame] | 1323 | #endif /* USE_OPENSSL */ |
Amaury Denoyelle | 01a287f | 2021-02-11 16:46:53 +0100 | [diff] [blame] | 1324 | |
Amaury Denoyelle | 926712a | 2021-10-20 15:04:03 +0200 | [diff] [blame] | 1325 | /* 3. destination address */ |
Amaury Denoyelle | 01a287f | 2021-02-11 16:46:53 +0100 | [diff] [blame] | 1326 | if (srv && (!is_addr(&srv->addr) || srv->flags & SRV_F_MAPPORTS)) |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1327 | hash_params.dst_addr = cs_si(s->csb)->dst; |
Amaury Denoyelle | 01a287f | 2021-02-11 16:46:53 +0100 | [diff] [blame] | 1328 | |
Amaury Denoyelle | 8ede3db | 2021-03-02 14:38:53 +0100 | [diff] [blame] | 1329 | /* 4. source address */ |
Amaury Denoyelle | d10a200 | 2021-02-11 19:45:19 +0100 | [diff] [blame] | 1330 | hash_params.src_addr = bind_addr; |
| 1331 | |
Amaury Denoyelle | 8ede3db | 2021-03-02 14:38:53 +0100 | [diff] [blame] | 1332 | /* 5. proxy protocol */ |
Amaury Denoyelle | 1921d20 | 2021-01-14 10:15:29 +0100 | [diff] [blame] | 1333 | if (srv && srv->pp_opts) { |
| 1334 | proxy_line_ret = make_proxy_line(trash.area, trash.size, srv, cli_conn, s); |
| 1335 | if (proxy_line_ret) { |
Amaury Denoyelle | 36441f4 | 2021-02-17 16:25:31 +0100 | [diff] [blame] | 1336 | hash_params.proxy_prehash = |
| 1337 | conn_hash_prehash(trash.area, proxy_line_ret); |
Amaury Denoyelle | 1921d20 | 2021-01-14 10:15:29 +0100 | [diff] [blame] | 1338 | } |
| 1339 | } |
| 1340 | |
Amaury Denoyelle | 8ede3db | 2021-03-02 14:38:53 +0100 | [diff] [blame] | 1341 | hash = conn_calculate_hash(&hash_params); |
Olivier Houchard | 7c6f8b1 | 2018-11-13 16:48:36 +0100 | [diff] [blame] | 1342 | |
Willy Tarreau | b082186 | 2019-07-18 19:26:11 +0200 | [diff] [blame] | 1343 | /* first, search for a matching connection in the session's idle conns */ |
Amaury Denoyelle | 293dcc4 | 2021-01-25 10:29:35 +0100 | [diff] [blame] | 1344 | srv_conn = session_get_conn(s->sess, s->target, hash); |
Amaury Denoyelle | 1252b6f | 2021-10-20 15:22:01 +0200 | [diff] [blame] | 1345 | if (srv_conn) { |
| 1346 | DBG_TRACE_STATE("reuse connection from session", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
Christopher Faulet | fcc3d8a | 2020-07-01 16:36:51 +0200 | [diff] [blame] | 1347 | reuse = 1; |
Amaury Denoyelle | 1252b6f | 2021-10-20 15:22:01 +0200 | [diff] [blame] | 1348 | } |
Olivier Houchard | 00cf70f | 2018-11-30 17:24:55 +0100 | [diff] [blame] | 1349 | |
Amaury Denoyelle | 7f68d81 | 2021-01-26 14:35:26 +0100 | [diff] [blame] | 1350 | if (srv && !reuse && reuse_mode != PR_O_REUSE_NEVR) { |
Olivier Houchard | dc2f275 | 2020-02-13 19:12:07 +0100 | [diff] [blame] | 1351 | /* Below we pick connections from the safe, idle or |
| 1352 | * available (which are safe too) lists based |
Willy Tarreau | 449d74a | 2015-08-05 17:16:33 +0200 | [diff] [blame] | 1353 | * on the strategy, the fact that this is a first or second |
| 1354 | * (retryable) request, with the indicated priority (1 or 2) : |
| 1355 | * |
| 1356 | * SAFE AGGR ALWS |
| 1357 | * |
| 1358 | * +-----+-----+ +-----+-----+ +-----+-----+ |
| 1359 | * req| 1st | 2nd | req| 1st | 2nd | req| 1st | 2nd | |
| 1360 | * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+ |
| 1361 | * safe| - | 2 | safe| 1 | 2 | safe| 1 | 2 | |
| 1362 | * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+ |
| 1363 | * idle| - | 1 | idle| - | 1 | idle| 2 | 1 | |
| 1364 | * ----+-----+-----+ ----+-----+-----+ ----+-----+-----+ |
Willy Tarreau | b082186 | 2019-07-18 19:26:11 +0200 | [diff] [blame] | 1365 | * |
| 1366 | * Idle conns are necessarily looked up on the same thread so |
| 1367 | * that there is no concurrency issues. |
Willy Tarreau | 449d74a | 2015-08-05 17:16:33 +0200 | [diff] [blame] | 1368 | */ |
Willy Tarreau | 430bf4a | 2021-03-04 09:45:32 +0100 | [diff] [blame] | 1369 | if (!eb_is_empty(&srv->per_thr[tid].avail_conns)) { |
| 1370 | srv_conn = srv_lookup_conn(&srv->per_thr[tid].avail_conns, hash); |
Amaury Denoyelle | 1252b6f | 2021-10-20 15:22:01 +0200 | [diff] [blame] | 1371 | if (srv_conn) { |
| 1372 | DBG_TRACE_STATE("reuse connection from avail", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1373 | reuse = 1; |
Amaury Denoyelle | 1252b6f | 2021-10-20 15:22:01 +0200 | [diff] [blame] | 1374 | } |
Willy Tarreau | 449d74a | 2015-08-05 17:16:33 +0200 | [diff] [blame] | 1375 | } |
Amaury Denoyelle | 1399d69 | 2021-01-22 19:37:44 +0100 | [diff] [blame] | 1376 | |
Amaury Denoyelle | 7f68d81 | 2021-01-26 14:35:26 +0100 | [diff] [blame] | 1377 | /* if no available connections found, search for an idle/safe */ |
Amaury Denoyelle | 1399d69 | 2021-01-22 19:37:44 +0100 | [diff] [blame] | 1378 | if (!srv_conn && srv->max_idle_conns && srv->curr_idle_conns > 0) { |
Amaury Denoyelle | 7f68d81 | 2021-01-26 14:35:26 +0100 | [diff] [blame] | 1379 | const int not_first_req = s->txn && s->txn->flags & TX_NOT_FIRST; |
| 1380 | const int idle = srv->curr_idle_nb > 0; |
| 1381 | const int safe = srv->curr_safe_nb > 0; |
| 1382 | |
| 1383 | /* second column of the tables above, |
| 1384 | * search for an idle then safe conn */ |
| 1385 | if (not_first_req) { |
| 1386 | if (idle || safe) |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1387 | srv_conn = conn_backend_get(s, srv, 0, hash); |
Olivier Houchard | 566df30 | 2020-03-06 18:18:56 +0100 | [diff] [blame] | 1388 | } |
Amaury Denoyelle | 7f68d81 | 2021-01-26 14:35:26 +0100 | [diff] [blame] | 1389 | /* first column of the tables above */ |
| 1390 | else if (reuse_mode >= PR_O_REUSE_AGGR) { |
| 1391 | /* search for a safe conn */ |
| 1392 | if (safe) |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1393 | srv_conn = conn_backend_get(s, srv, 1, hash); |
Amaury Denoyelle | aa890ae | 2021-01-25 14:43:17 +0100 | [diff] [blame] | 1394 | |
| 1395 | /* search for an idle conn if no safe conn found |
| 1396 | * on always reuse mode */ |
| 1397 | if (!srv_conn && |
| 1398 | reuse_mode == PR_O_REUSE_ALWS && idle) { |
| 1399 | /* TODO conn_backend_get should not check the |
| 1400 | * safe list is this case */ |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1401 | srv_conn = conn_backend_get(s, srv, 0, hash); |
Amaury Denoyelle | aa890ae | 2021-01-25 14:43:17 +0100 | [diff] [blame] | 1402 | } |
Olivier Houchard | 566df30 | 2020-03-06 18:18:56 +0100 | [diff] [blame] | 1403 | } |
Amaury Denoyelle | 37e25bc | 2021-01-26 14:35:25 +0100 | [diff] [blame] | 1404 | |
Amaury Denoyelle | 1252b6f | 2021-10-20 15:22:01 +0200 | [diff] [blame] | 1405 | if (srv_conn) { |
| 1406 | DBG_TRACE_STATE("reuse connection from idle/safe", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
Olivier Houchard | 566df30 | 2020-03-06 18:18:56 +0100 | [diff] [blame] | 1407 | reuse = 1; |
Amaury Denoyelle | 1252b6f | 2021-10-20 15:22:01 +0200 | [diff] [blame] | 1408 | } |
Olivier Houchard | dc2f275 | 2020-02-13 19:12:07 +0100 | [diff] [blame] | 1409 | } |
Willy Tarreau | 8dff998 | 2015-08-04 20:45:52 +0200 | [diff] [blame] | 1410 | } |
| 1411 | |
Willy Tarreau | b082186 | 2019-07-18 19:26:11 +0200 | [diff] [blame] | 1412 | |
| 1413 | /* here reuse might have been set above, indicating srv_conn finally |
| 1414 | * is OK. |
| 1415 | */ |
Willy Tarreau | b082186 | 2019-07-18 19:26:11 +0200 | [diff] [blame] | 1416 | |
Willy Tarreau | 430bf4a | 2021-03-04 09:45:32 +0100 | [diff] [blame] | 1417 | if (ha_used_fds > global.tune.pool_high_count && srv) { |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1418 | struct connection *tokill_conn = NULL; |
Amaury Denoyelle | 8990b01 | 2021-02-19 15:29:16 +0100 | [diff] [blame] | 1419 | struct conn_hash_node *conn_node = NULL; |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1420 | struct ebmb_node *node = NULL; |
Olivier Houchard | 88698d9 | 2019-04-16 19:07:22 +0200 | [diff] [blame] | 1421 | |
| 1422 | /* We can't reuse a connection, and e have more FDs than deemd |
| 1423 | * acceptable, attempt to kill an idling connection |
| 1424 | */ |
| 1425 | /* First, try from our own idle list */ |
Amaury Denoyelle | 5c7086f | 2021-01-11 09:21:52 +0100 | [diff] [blame] | 1426 | HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock); |
Willy Tarreau | 430bf4a | 2021-03-04 09:45:32 +0100 | [diff] [blame] | 1427 | node = ebmb_first(&srv->per_thr[tid].idle_conns); |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1428 | if (node) { |
Amaury Denoyelle | 8990b01 | 2021-02-19 15:29:16 +0100 | [diff] [blame] | 1429 | conn_node = ebmb_entry(node, struct conn_hash_node, node); |
| 1430 | tokill_conn = conn_node->conn; |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1431 | ebmb_delete(node); |
Amaury Denoyelle | 65bf600 | 2021-03-23 10:44:43 +0100 | [diff] [blame] | 1432 | HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock); |
| 1433 | |
| 1434 | /* Release the idle lock before calling mux->destroy. |
| 1435 | * It will in turn call srv_release_conn through |
| 1436 | * conn_free which also uses it. |
| 1437 | */ |
Olivier Houchard | 88698d9 | 2019-04-16 19:07:22 +0200 | [diff] [blame] | 1438 | tokill_conn->mux->destroy(tokill_conn->ctx); |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1439 | } |
Amaury Denoyelle | 65bf600 | 2021-03-23 10:44:43 +0100 | [diff] [blame] | 1440 | else { |
| 1441 | HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock); |
| 1442 | } |
Amaury Denoyelle | 5c7086f | 2021-01-11 09:21:52 +0100 | [diff] [blame] | 1443 | |
Olivier Houchard | 88698d9 | 2019-04-16 19:07:22 +0200 | [diff] [blame] | 1444 | /* If not, iterate over other thread's idling pool, and try to grab one */ |
Amaury Denoyelle | 5c7086f | 2021-01-11 09:21:52 +0100 | [diff] [blame] | 1445 | if (!tokill_conn) { |
Olivier Houchard | 88698d9 | 2019-04-16 19:07:22 +0200 | [diff] [blame] | 1446 | int i; |
| 1447 | |
Willy Tarreau | c35bcfc | 2020-06-29 14:43:16 +0200 | [diff] [blame] | 1448 | for (i = tid; (i = ((i + 1 == global.nbthread) ? 0 : i + 1)) != tid;) { |
Willy Tarreau | 08e2b41 | 2019-05-26 11:50:08 +0200 | [diff] [blame] | 1449 | // just silence stupid gcc which reports an absurd |
| 1450 | // out-of-bounds warning for <i> which is always |
| 1451 | // exactly zero without threads, but it seems to |
| 1452 | // see it possibly larger. |
| 1453 | ALREADY_CHECKED(i); |
| 1454 | |
Willy Tarreau | 9b9f847 | 2021-03-26 20:52:10 +0100 | [diff] [blame] | 1455 | if (HA_SPIN_TRYLOCK(IDLE_CONNS_LOCK, &idle_conns[i].idle_conns_lock) != 0) |
| 1456 | continue; |
| 1457 | |
Willy Tarreau | 430bf4a | 2021-03-04 09:45:32 +0100 | [diff] [blame] | 1458 | node = ebmb_first(&srv->per_thr[i].idle_conns); |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1459 | if (node) { |
Amaury Denoyelle | 8990b01 | 2021-02-19 15:29:16 +0100 | [diff] [blame] | 1460 | conn_node = ebmb_entry(node, struct conn_hash_node, node); |
| 1461 | tokill_conn = conn_node->conn; |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1462 | ebmb_delete(node); |
| 1463 | } |
| 1464 | |
| 1465 | if (!tokill_conn) { |
Willy Tarreau | 430bf4a | 2021-03-04 09:45:32 +0100 | [diff] [blame] | 1466 | node = ebmb_first(&srv->per_thr[i].safe_conns); |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1467 | if (node) { |
Amaury Denoyelle | 8990b01 | 2021-02-19 15:29:16 +0100 | [diff] [blame] | 1468 | conn_node = ebmb_entry(node, struct conn_hash_node, node); |
| 1469 | tokill_conn = conn_node->conn; |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1470 | ebmb_delete(node); |
| 1471 | } |
| 1472 | } |
Amaury Denoyelle | 5c7086f | 2021-01-11 09:21:52 +0100 | [diff] [blame] | 1473 | HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[i].idle_conns_lock); |
Amaury Denoyelle | a3bf62e | 2021-01-28 10:16:29 +0100 | [diff] [blame] | 1474 | |
Olivier Houchard | 88698d9 | 2019-04-16 19:07:22 +0200 | [diff] [blame] | 1475 | if (tokill_conn) { |
| 1476 | /* We got one, put it into the concerned thread's to kill list, and wake it's kill task */ |
| 1477 | |
Willy Tarreau | 2b71810 | 2021-04-21 07:32:39 +0200 | [diff] [blame] | 1478 | MT_LIST_APPEND(&idle_conns[i].toremove_conns, |
Amaury Denoyelle | f232cb3 | 2021-01-06 16:14:12 +0100 | [diff] [blame] | 1479 | (struct mt_list *)&tokill_conn->toremove_list); |
Willy Tarreau | 4d82bf5 | 2020-06-28 00:19:17 +0200 | [diff] [blame] | 1480 | task_wakeup(idle_conns[i].cleanup_task, TASK_WOKEN_OTHER); |
Olivier Houchard | 88698d9 | 2019-04-16 19:07:22 +0200 | [diff] [blame] | 1481 | break; |
| 1482 | } |
| 1483 | } |
| 1484 | } |
| 1485 | |
| 1486 | } |
Willy Tarreau | 34601a8 | 2013-12-15 16:33:46 +0100 | [diff] [blame] | 1487 | |
Willy Tarreau | 2c7dedd | 2019-01-24 18:22:19 +0100 | [diff] [blame] | 1488 | if (reuse) { |
Willy Tarreau | b082186 | 2019-07-18 19:26:11 +0200 | [diff] [blame] | 1489 | if (srv_conn->mux) { |
Willy Tarreau | 2c7dedd | 2019-01-24 18:22:19 +0100 | [diff] [blame] | 1490 | int avail = srv_conn->mux->avail_streams(srv_conn); |
| 1491 | |
| 1492 | if (avail <= 1) { |
Olivier Houchard | 2442f68 | 2018-12-01 17:03:38 +0100 | [diff] [blame] | 1493 | /* No more streams available, remove it from the list */ |
Amaury Denoyelle | 8990b01 | 2021-02-19 15:29:16 +0100 | [diff] [blame] | 1494 | conn_delete_from_tree(&srv_conn->hash_node->node); |
Olivier Houchard | 2442f68 | 2018-12-01 17:03:38 +0100 | [diff] [blame] | 1495 | } |
Willy Tarreau | 2c7dedd | 2019-01-24 18:22:19 +0100 | [diff] [blame] | 1496 | |
| 1497 | if (avail >= 1) { |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1498 | si_attach_conn(cs_si(s->csb), srv_conn); |
Christopher Faulet | 95a61e8 | 2021-12-22 14:22:03 +0100 | [diff] [blame] | 1499 | if (srv_conn->mux->attach(srv_conn, s->csb, s->sess) == -1) { |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1500 | si_reset_endpoint(cs_si(s->csb)); |
Willy Tarreau | 2c7dedd | 2019-01-24 18:22:19 +0100 | [diff] [blame] | 1501 | srv_conn = NULL; |
Christopher Faulet | 13a35e5 | 2021-12-20 15:34:16 +0100 | [diff] [blame] | 1502 | } |
Willy Tarreau | 2c7dedd | 2019-01-24 18:22:19 +0100 | [diff] [blame] | 1503 | } |
Olivier Houchard | 134a204 | 2018-12-28 14:45:47 +0100 | [diff] [blame] | 1504 | else |
| 1505 | srv_conn = NULL; |
Olivier Houchard | 7c6f8b1 | 2018-11-13 16:48:36 +0100 | [diff] [blame] | 1506 | } |
Willy Tarreau | 2c7dedd | 2019-01-24 18:22:19 +0100 | [diff] [blame] | 1507 | /* otherwise srv_conn is left intact */ |
| 1508 | } |
| 1509 | else |
| 1510 | srv_conn = NULL; |
| 1511 | |
Amaury Denoyelle | 08d87b3 | 2021-01-26 17:35:46 +0100 | [diff] [blame] | 1512 | skip_reuse: |
Willy Tarreau | 2c7dedd | 2019-01-24 18:22:19 +0100 | [diff] [blame] | 1513 | /* no reuse or failed to reuse the connection above, pick a new one */ |
| 1514 | if (!srv_conn) { |
Christopher Faulet | 236c93b | 2020-07-02 09:19:54 +0200 | [diff] [blame] | 1515 | srv_conn = conn_new(s->target); |
Willy Tarreau | dc2ac81 | 2020-07-15 17:46:32 +0200 | [diff] [blame] | 1516 | if (srv_conn) { |
Amaury Denoyelle | 1252b6f | 2021-10-20 15:22:01 +0200 | [diff] [blame] | 1517 | DBG_TRACE_STATE("alloc new be connection", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
Willy Tarreau | dc2ac81 | 2020-07-15 17:46:32 +0200 | [diff] [blame] | 1518 | srv_conn->owner = s->sess; |
Amaury Denoyelle | 8ede3db | 2021-03-02 14:38:53 +0100 | [diff] [blame] | 1519 | |
| 1520 | /* connection will be attached to the session if |
| 1521 | * http-reuse mode is never or it is not targeted to a |
| 1522 | * server */ |
| 1523 | if (reuse_mode == PR_O_REUSE_NEVR || !srv) |
Willy Tarreau | dc2ac81 | 2020-07-15 17:46:32 +0200 | [diff] [blame] | 1524 | conn_set_private(srv_conn); |
Willy Tarreau | 2c7dedd | 2019-01-24 18:22:19 +0100 | [diff] [blame] | 1525 | |
Amaury Denoyelle | 68967e5 | 2021-03-02 12:01:06 +0100 | [diff] [blame] | 1526 | /* assign bind_addr to srv_conn */ |
Amaury Denoyelle | d10a200 | 2021-02-11 19:45:19 +0100 | [diff] [blame] | 1527 | srv_conn->src = bind_addr; |
Amaury Denoyelle | 68967e5 | 2021-03-02 12:01:06 +0100 | [diff] [blame] | 1528 | bind_addr = NULL; |
Amaury Denoyelle | f7bdf00 | 2021-01-21 09:40:19 +0100 | [diff] [blame] | 1529 | |
Amaury Denoyelle | 01a287f | 2021-02-11 16:46:53 +0100 | [diff] [blame] | 1530 | if (!sockaddr_alloc(&srv_conn->dst, 0, 0)) { |
| 1531 | conn_free(srv_conn); |
| 1532 | return SF_ERR_RESOURCE; |
| 1533 | } |
Amaury Denoyelle | aee4fdb | 2021-10-20 15:22:20 +0200 | [diff] [blame] | 1534 | |
| 1535 | srv_conn->hash_node->hash = hash; |
Olivier Houchard | c0caac2 | 2020-03-20 14:26:32 +0100 | [diff] [blame] | 1536 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1537 | } |
| 1538 | |
Amaury Denoyelle | 68967e5 | 2021-03-02 12:01:06 +0100 | [diff] [blame] | 1539 | /* if bind_addr is non NULL free it */ |
| 1540 | sockaddr_free(&bind_addr); |
| 1541 | |
| 1542 | /* srv_conn is still NULL only on allocation failure */ |
| 1543 | if (!srv_conn) |
| 1544 | return SF_ERR_RESOURCE; |
| 1545 | |
Willy Tarreau | 1c8d32b | 2019-07-18 15:47:45 +0200 | [diff] [blame] | 1546 | /* copy the target address into the connection */ |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1547 | *srv_conn->dst = *(cs_si(s->csb))->dst; |
Willy Tarreau | 1c8d32b | 2019-07-18 15:47:45 +0200 | [diff] [blame] | 1548 | |
| 1549 | /* Copy network namespace from client connection */ |
| 1550 | srv_conn->proxy_netns = cli_conn ? cli_conn->proxy_netns : NULL; |
| 1551 | |
Olivier Houchard | 1b3c931 | 2021-03-05 23:37:48 +0100 | [diff] [blame] | 1552 | if (!srv_conn->xprt) { |
Willy Tarreau | ff605db | 2013-12-20 11:09:51 +0100 | [diff] [blame] | 1553 | /* set the correct protocol on the output stream interface */ |
Olivier Houchard | 1b3c931 | 2021-03-05 23:37:48 +0100 | [diff] [blame] | 1554 | if (srv) { |
Willy Tarreau | 14e7f29 | 2021-10-27 17:41:07 +0200 | [diff] [blame] | 1555 | if (conn_prepare(srv_conn, protocol_lookup(srv_conn->dst->ss_family, PROTO_TYPE_STREAM, 0), srv->xprt)) { |
Olivier Houchard | 1b3c931 | 2021-03-05 23:37:48 +0100 | [diff] [blame] | 1556 | conn_free(srv_conn); |
| 1557 | return SF_ERR_INTERNAL; |
| 1558 | } |
| 1559 | } else if (obj_type(s->target) == OBJ_TYPE_PROXY) { |
| 1560 | int ret; |
| 1561 | |
Willy Tarreau | ff605db | 2013-12-20 11:09:51 +0100 | [diff] [blame] | 1562 | /* proxies exclusively run on raw_sock right now */ |
Willy Tarreau | 14e7f29 | 2021-10-27 17:41:07 +0200 | [diff] [blame] | 1563 | ret = conn_prepare(srv_conn, protocol_lookup(srv_conn->dst->ss_family, PROTO_TYPE_STREAM, 0), xprt_get(XPRT_RAW)); |
Olivier Houchard | 1b3c931 | 2021-03-05 23:37:48 +0100 | [diff] [blame] | 1564 | if (ret < 0 || !(srv_conn->ctrl)) { |
Olivier Houchard | c0caac2 | 2020-03-20 14:26:32 +0100 | [diff] [blame] | 1565 | conn_free(srv_conn); |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 1566 | return SF_ERR_INTERNAL; |
Olivier Houchard | c0caac2 | 2020-03-20 14:26:32 +0100 | [diff] [blame] | 1567 | } |
Willy Tarreau | ff605db | 2013-12-20 11:09:51 +0100 | [diff] [blame] | 1568 | } |
Olivier Houchard | c0caac2 | 2020-03-20 14:26:32 +0100 | [diff] [blame] | 1569 | else { |
| 1570 | conn_free(srv_conn); |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 1571 | return SF_ERR_INTERNAL; /* how did we get there ? */ |
Olivier Houchard | c0caac2 | 2020-03-20 14:26:32 +0100 | [diff] [blame] | 1572 | } |
Willy Tarreau | d02394b | 2012-05-11 18:32:18 +0200 | [diff] [blame] | 1573 | |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1574 | si_attach_conn(cs_si(s->csb), srv_conn); |
Olivier Houchard | ecffb7d | 2020-01-24 14:10:55 +0100 | [diff] [blame] | 1575 | #if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation) |
Olivier Houchard | 1295016 | 2018-11-23 14:32:08 +0100 | [diff] [blame] | 1576 | if (!srv || |
Christopher Faulet | b4de420 | 2020-07-30 09:10:36 +0200 | [diff] [blame] | 1577 | (srv->use_ssl != 1 || (!(srv->ssl_ctx.alpn_str) && !(srv->ssl_ctx.npn_str)) || |
Christopher Faulet | 1bb6afa | 2021-03-08 17:57:53 +0100 | [diff] [blame] | 1578 | srv->mux_proto || !IS_HTX_STRM(s))) |
Olivier Houchard | 201b9f4 | 2018-11-21 00:16:29 +0100 | [diff] [blame] | 1579 | #endif |
Olivier Houchard | 5cd6217 | 2019-01-04 15:52:26 +0100 | [diff] [blame] | 1580 | init_mux = 1; |
Christopher Faulet | 08016ab | 2020-07-01 16:10:06 +0200 | [diff] [blame] | 1581 | |
Willy Tarreau | ff605db | 2013-12-20 11:09:51 +0100 | [diff] [blame] | 1582 | /* process the case where the server requires the PROXY protocol to be sent */ |
| 1583 | srv_conn->send_proxy_ofs = 0; |
Olivier Houchard | 522eea7 | 2017-11-03 16:27:47 +0100 | [diff] [blame] | 1584 | |
Willy Tarreau | 7b00492 | 2015-08-04 19:34:21 +0200 | [diff] [blame] | 1585 | if (srv && srv->pp_opts) { |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1586 | srv_conn->flags |= CO_FL_SEND_PROXY; |
Willy Tarreau | ff605db | 2013-12-20 11:09:51 +0100 | [diff] [blame] | 1587 | srv_conn->send_proxy_ofs = 1; /* must compute size */ |
Willy Tarreau | ff605db | 2013-12-20 11:09:51 +0100 | [diff] [blame] | 1588 | } |
Willy Tarreau | 2a6e880 | 2013-10-24 15:50:53 +0200 | [diff] [blame] | 1589 | |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1590 | if (srv && (srv->flags & SRV_F_SOCKS4_PROXY)) { |
| 1591 | srv_conn->send_proxy_ofs = 1; |
| 1592 | srv_conn->flags |= CO_FL_SOCKS4; |
| 1593 | } |
Amaury Denoyelle | 9c3251d | 2021-10-18 14:39:57 +0200 | [diff] [blame] | 1594 | |
| 1595 | #if defined(USE_OPENSSL) && defined(TLSEXT_TYPE_application_layer_protocol_negotiation) |
| 1596 | /* if websocket stream, try to update connection ALPN. */ |
| 1597 | if (unlikely(s->flags & SF_WEBSOCKET) && |
| 1598 | srv && srv->use_ssl && srv->ssl_ctx.alpn_str) { |
| 1599 | char *alpn = ""; |
| 1600 | int force = 0; |
| 1601 | |
| 1602 | switch (srv->ws) { |
| 1603 | case SRV_WS_AUTO: |
| 1604 | alpn = "\x08http/1.1"; |
| 1605 | force = 0; |
| 1606 | break; |
| 1607 | case SRV_WS_H1: |
| 1608 | alpn = "\x08http/1.1"; |
| 1609 | force = 1; |
| 1610 | break; |
| 1611 | case SRV_WS_H2: |
| 1612 | alpn = "\x02h2"; |
| 1613 | force = 1; |
| 1614 | break; |
| 1615 | } |
| 1616 | |
| 1617 | if (!conn_update_alpn(srv_conn, ist(alpn), force)) |
| 1618 | DBG_TRACE_STATE("update alpn for websocket", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 1619 | } |
| 1620 | #endif |
Willy Tarreau | ff605db | 2013-12-20 11:09:51 +0100 | [diff] [blame] | 1621 | } |
Olivier Houchard | e8f5f5d | 2019-10-25 17:00:54 +0200 | [diff] [blame] | 1622 | else { |
Amaury Denoyelle | 2b1d917 | 2021-06-17 15:14:49 +0200 | [diff] [blame] | 1623 | s->flags |= SF_SRV_REUSED; |
| 1624 | |
Amaury Denoyelle | d7faa3d | 2021-03-05 15:27:41 +0100 | [diff] [blame] | 1625 | /* Currently there seems to be no known cases of xprt ready |
| 1626 | * without the mux installed here. |
| 1627 | */ |
| 1628 | BUG_ON(!srv_conn->mux); |
| 1629 | |
Amaury Denoyelle | 2b1d917 | 2021-06-17 15:14:49 +0200 | [diff] [blame] | 1630 | if (!(srv_conn->mux->ctl(srv_conn, MUX_STATUS, NULL) & MUX_STATUS_READY)) |
| 1631 | s->flags |= SF_SRV_REUSED_ANTICIPATED; |
Olivier Houchard | e8f5f5d | 2019-10-25 17:00:54 +0200 | [diff] [blame] | 1632 | } |
Willy Tarreau | b1d6774 | 2010-03-29 19:36:59 +0200 | [diff] [blame] | 1633 | |
William Lallemand | b7ff6a3 | 2012-03-02 14:35:21 +0100 | [diff] [blame] | 1634 | /* flag for logging source ip/port */ |
Willy Tarreau | d0d8da9 | 2015-04-04 02:10:38 +0200 | [diff] [blame] | 1635 | if (strm_fe(s)->options2 & PR_O2_SRC_ADDR) |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1636 | cs_si(s->csb)->flags |= SI_FL_SRC_ADDR; |
William Lallemand | b7ff6a3 | 2012-03-02 14:35:21 +0100 | [diff] [blame] | 1637 | |
Willy Tarreau | 14f8e86 | 2012-08-30 22:23:13 +0200 | [diff] [blame] | 1638 | /* disable lingering */ |
| 1639 | if (s->be->options & PR_O_TCP_NOLING) |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1640 | cs_si(s->csb)->flags |= SI_FL_NOLINGER; |
Willy Tarreau | 14f8e86 | 2012-08-30 22:23:13 +0200 | [diff] [blame] | 1641 | |
Willy Tarreau | f157384 | 2018-12-14 11:35:36 +0100 | [diff] [blame] | 1642 | if (s->flags & SF_SRV_REUSED) { |
Willy Tarreau | 4781b15 | 2021-04-06 13:53:36 +0200 | [diff] [blame] | 1643 | _HA_ATOMIC_INC(&s->be->be_counters.reuse); |
Willy Tarreau | cc79ed2 | 2018-12-15 15:11:36 +0100 | [diff] [blame] | 1644 | if (srv) |
Willy Tarreau | 4781b15 | 2021-04-06 13:53:36 +0200 | [diff] [blame] | 1645 | _HA_ATOMIC_INC(&srv->counters.reuse); |
Willy Tarreau | f157384 | 2018-12-14 11:35:36 +0100 | [diff] [blame] | 1646 | } else { |
Willy Tarreau | 4781b15 | 2021-04-06 13:53:36 +0200 | [diff] [blame] | 1647 | _HA_ATOMIC_INC(&s->be->be_counters.connect); |
Willy Tarreau | cc79ed2 | 2018-12-15 15:11:36 +0100 | [diff] [blame] | 1648 | if (srv) |
Willy Tarreau | 4781b15 | 2021-04-06 13:53:36 +0200 | [diff] [blame] | 1649 | _HA_ATOMIC_INC(&srv->counters.connect); |
Willy Tarreau | f157384 | 2018-12-14 11:35:36 +0100 | [diff] [blame] | 1650 | } |
| 1651 | |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1652 | err = si_connect(cs_si(s->csb), srv_conn); |
Willy Tarreau | 09e0203 | 2019-07-18 16:18:20 +0200 | [diff] [blame] | 1653 | if (err != SF_ERR_NONE) |
| 1654 | return err; |
| 1655 | |
Christopher Faulet | 27bd6ff | 2020-07-01 11:00:18 +0200 | [diff] [blame] | 1656 | #ifdef USE_OPENSSL |
Amaury Denoyelle | 655dec8 | 2021-06-01 17:04:10 +0200 | [diff] [blame] | 1657 | if (!(s->flags & SF_SRV_REUSED)) { |
| 1658 | if (smp_make_safe(sni_smp)) |
| 1659 | ssl_sock_set_servername(srv_conn, sni_smp->data.u.str.area); |
| 1660 | } |
Christopher Faulet | 27bd6ff | 2020-07-01 11:00:18 +0200 | [diff] [blame] | 1661 | #endif /* USE_OPENSSL */ |
| 1662 | |
Willy Tarreau | a3b1756 | 2020-07-31 08:39:31 +0200 | [diff] [blame] | 1663 | /* The CO_FL_SEND_PROXY flag may have been set by the connect method, |
| 1664 | * if so, add our handshake pseudo-XPRT now. |
| 1665 | */ |
| 1666 | if ((srv_conn->flags & CO_FL_HANDSHAKE)) { |
| 1667 | if (xprt_add_hs(srv_conn) < 0) { |
| 1668 | conn_full_close(srv_conn); |
| 1669 | return SF_ERR_INTERNAL; |
| 1670 | } |
| 1671 | } |
Olivier Houchard | 1b3c931 | 2021-03-05 23:37:48 +0100 | [diff] [blame] | 1672 | conn_xprt_start(srv_conn); |
Willy Tarreau | a3b1756 | 2020-07-31 08:39:31 +0200 | [diff] [blame] | 1673 | |
Olivier Houchard | 5cd6217 | 2019-01-04 15:52:26 +0100 | [diff] [blame] | 1674 | /* We have to defer the mux initialization until after si_connect() |
| 1675 | * has been called, as we need the xprt to have been properly |
| 1676 | * initialized, or any attempt to recv during the mux init may |
| 1677 | * fail, and flag the connection as CO_FL_ERROR. |
| 1678 | */ |
| 1679 | if (init_mux) { |
Amaury Denoyelle | 9c3251d | 2021-10-18 14:39:57 +0200 | [diff] [blame] | 1680 | const struct mux_ops *alt_mux = |
| 1681 | likely(!(s->flags & SF_WEBSOCKET)) ? NULL : srv_get_ws_proto(srv); |
Christopher Faulet | 95a61e8 | 2021-12-22 14:22:03 +0100 | [diff] [blame] | 1682 | if (conn_install_mux_be(srv_conn, s->csb, s->sess, alt_mux) < 0) { |
Olivier Houchard | 7493114 | 2019-01-29 19:11:16 +0100 | [diff] [blame] | 1683 | conn_full_close(srv_conn); |
Olivier Houchard | 5cd6217 | 2019-01-04 15:52:26 +0100 | [diff] [blame] | 1684 | return SF_ERR_INTERNAL; |
Olivier Houchard | 7493114 | 2019-01-29 19:11:16 +0100 | [diff] [blame] | 1685 | } |
Christopher Faulet | 1bb6afa | 2021-03-08 17:57:53 +0100 | [diff] [blame] | 1686 | if (IS_HTX_STRM(s)) { |
Amaury Denoyelle | 08d87b3 | 2021-01-26 17:35:46 +0100 | [diff] [blame] | 1687 | /* If we're doing http-reuse always, and the connection |
| 1688 | * is not private with available streams (an http2 |
| 1689 | * connection), add it to the available list, so that |
| 1690 | * others can use it right away. If the connection is |
| 1691 | * private or we're doing http-reuse safe and the mux |
| 1692 | * protocol supports multiplexing, add it in the |
| 1693 | * session server list. |
| 1694 | */ |
| 1695 | if (srv && reuse_mode == PR_O_REUSE_ALWS && |
| 1696 | !(srv_conn->flags & CO_FL_PRIVATE) && |
| 1697 | srv_conn->mux->avail_streams(srv_conn) > 0) { |
Willy Tarreau | 430bf4a | 2021-03-04 09:45:32 +0100 | [diff] [blame] | 1698 | ebmb_insert(&srv->per_thr[tid].avail_conns, &srv_conn->hash_node->node, sizeof(srv_conn->hash_node->hash)); |
Amaury Denoyelle | 08d87b3 | 2021-01-26 17:35:46 +0100 | [diff] [blame] | 1699 | } |
| 1700 | else if (srv_conn->flags & CO_FL_PRIVATE || |
| 1701 | (reuse_mode == PR_O_REUSE_SAFE && |
| 1702 | srv_conn->mux->flags & MX_FL_HOL_RISK)) { |
| 1703 | /* If it fail now, the same will be done in mux->detach() callback */ |
| 1704 | session_add_conn(s->sess, srv_conn, srv_conn->target); |
| 1705 | } |
Christopher Faulet | 08016ab | 2020-07-01 16:10:06 +0200 | [diff] [blame] | 1706 | } |
Olivier Houchard | 5cd6217 | 2019-01-04 15:52:26 +0100 | [diff] [blame] | 1707 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1708 | |
Willy Tarreau | b131049 | 2021-08-30 09:35:18 +0200 | [diff] [blame] | 1709 | #if defined(USE_OPENSSL) && (defined(OPENSSL_IS_BORINGSSL) || (HA_OPENSSL_VERSION_NUMBER >= 0x10101000L)) |
Olivier Houchard | 4cd2af4 | 2019-05-06 15:18:27 +0200 | [diff] [blame] | 1710 | |
Olivier Houchard | 8694e5b | 2019-06-15 00:14:05 +0200 | [diff] [blame] | 1711 | if (!reuse && cli_conn && srv && srv_conn->mux && |
Olivier Houchard | 522eea7 | 2017-11-03 16:27:47 +0100 | [diff] [blame] | 1712 | (srv->ssl_ctx.options & SRV_SSL_O_EARLY_DATA) && |
Olivier Houchard | 865d839 | 2019-05-03 22:46:27 +0200 | [diff] [blame] | 1713 | /* Only attempt to use early data if either the client sent |
| 1714 | * early data, so that we know it can handle a 425, or if |
| 1715 | * we are allwoed to retry requests on early data failure, and |
| 1716 | * it's our first try |
| 1717 | */ |
| 1718 | ((cli_conn->flags & CO_FL_EARLY_DATA) || |
| 1719 | ((s->be->retry_type & PR_RE_EARLY_ERROR) && |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1720 | cs_si(s->csb)->conn_retries == s->be->conn_retries)) && |
| 1721 | !channel_is_empty(si_oc(cs_si(s->csb))) && |
Olivier Houchard | 865d839 | 2019-05-03 22:46:27 +0200 | [diff] [blame] | 1722 | srv_conn->flags & CO_FL_SSL_WAIT_HS) |
Olivier Houchard | 522eea7 | 2017-11-03 16:27:47 +0100 | [diff] [blame] | 1723 | srv_conn->flags &= ~(CO_FL_SSL_WAIT_HS | CO_FL_WAIT_L6_CONN); |
Willy Tarreau | 46c9d3e | 2017-11-08 14:25:59 +0100 | [diff] [blame] | 1724 | #endif |
Olivier Houchard | 522eea7 | 2017-11-03 16:27:47 +0100 | [diff] [blame] | 1725 | |
Willy Tarreau | 14f8e86 | 2012-08-30 22:23:13 +0200 | [diff] [blame] | 1726 | /* set connect timeout */ |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1727 | cs_si(s->csb)->exp = tick_add_ifset(now_ms, s->be->timeout.connect); |
Willy Tarreau | 14f8e86 | 2012-08-30 22:23:13 +0200 | [diff] [blame] | 1728 | |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 1729 | if (srv) { |
Christopher Faulet | 29f77e8 | 2017-06-08 14:04:45 +0200 | [diff] [blame] | 1730 | int count; |
| 1731 | |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 1732 | s->flags |= SF_CURR_SESS; |
Willy Tarreau | 1db4273 | 2021-04-06 11:44:07 +0200 | [diff] [blame] | 1733 | count = _HA_ATOMIC_ADD_FETCH(&srv->cur_sess, 1); |
Christopher Faulet | 29f77e8 | 2017-06-08 14:04:45 +0200 | [diff] [blame] | 1734 | HA_ATOMIC_UPDATE_MAX(&srv->counters.cur_sess_max, count); |
Willy Tarreau | 59b0fec | 2021-02-17 16:01:37 +0100 | [diff] [blame] | 1735 | if (s->be->lbprm.server_take_conn) |
Willy Tarreau | 5941ef0 | 2021-06-18 18:29:25 +0200 | [diff] [blame] | 1736 | s->be->lbprm.server_take_conn(srv); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1737 | } |
| 1738 | |
Willy Tarreau | ada4c58 | 2020-03-04 16:42:03 +0100 | [diff] [blame] | 1739 | /* Now handle synchronously connected sockets. We know the stream-int |
| 1740 | * is at least in state SI_ST_CON. These ones typically are UNIX |
| 1741 | * sockets, socket pairs, and occasionally TCP connections on the |
| 1742 | * loopback on a heavily loaded system. |
| 1743 | */ |
Christopher Faulet | 95a61e8 | 2021-12-22 14:22:03 +0100 | [diff] [blame] | 1744 | if ((srv_conn->flags & CO_FL_ERROR || s->csb->flags & CS_FL_ERROR)) |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1745 | cs_si(s->csb)->flags |= SI_FL_ERR; |
Willy Tarreau | ada4c58 | 2020-03-04 16:42:03 +0100 | [diff] [blame] | 1746 | |
| 1747 | /* If we had early data, and the handshake ended, then |
| 1748 | * we can remove the flag, and attempt to wake the task up, |
| 1749 | * in the event there's an analyser waiting for the end of |
| 1750 | * the handshake. |
| 1751 | */ |
| 1752 | if (!(srv_conn->flags & (CO_FL_WAIT_XPRT | CO_FL_EARLY_SSL_HS))) |
Christopher Faulet | 95a61e8 | 2021-12-22 14:22:03 +0100 | [diff] [blame] | 1753 | s->csb->flags &= ~CS_FL_WAIT_FOR_HS; |
Willy Tarreau | ada4c58 | 2020-03-04 16:42:03 +0100 | [diff] [blame] | 1754 | |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1755 | if (!si_state_in(cs_si(s->csb)->state, SI_SB_EST|SI_SB_DIS|SI_SB_CLO) && |
Willy Tarreau | ada4c58 | 2020-03-04 16:42:03 +0100 | [diff] [blame] | 1756 | (srv_conn->flags & CO_FL_WAIT_XPRT) == 0) { |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1757 | cs_si(s->csb)->exp = TICK_ETERNITY; |
| 1758 | si_oc(cs_si(s->csb))->flags |= CF_WRITE_NULL; |
| 1759 | if (cs_si(s->csb)->state == SI_ST_CON) |
| 1760 | cs_si(s->csb)->state = SI_ST_RDY; |
Willy Tarreau | ada4c58 | 2020-03-04 16:42:03 +0100 | [diff] [blame] | 1761 | } |
| 1762 | |
| 1763 | /* Report EOI on the channel if it was reached from the mux point of |
| 1764 | * view. |
| 1765 | * |
| 1766 | * Note: This test is only required because si_cs_process is also the SI |
| 1767 | * wake callback. Otherwise si_cs_recv()/si_cs_send() already take |
| 1768 | * care of it. |
| 1769 | */ |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1770 | if ((s->csb->flags & CS_FL_EOI) && !(si_ic(cs_si(s->csb))->flags & CF_EOI)) |
| 1771 | si_ic(cs_si(s->csb))->flags |= (CF_EOI|CF_READ_PARTIAL); |
Willy Tarreau | ada4c58 | 2020-03-04 16:42:03 +0100 | [diff] [blame] | 1772 | |
Christopher Faulet | 3f5bcd0 | 2020-07-29 22:42:27 +0200 | [diff] [blame] | 1773 | /* catch all sync connect while the mux is not already installed */ |
| 1774 | if (!srv_conn->mux && !(srv_conn->flags & CO_FL_WAIT_XPRT)) { |
| 1775 | if (conn_create_mux(srv_conn) < 0) { |
| 1776 | conn_full_close(srv_conn); |
| 1777 | return SF_ERR_INTERNAL; |
| 1778 | } |
| 1779 | } |
| 1780 | |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 1781 | return SF_ERR_NONE; /* connection is OK */ |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1782 | } |
| 1783 | |
| 1784 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1785 | /* This function performs the "redispatch" part of a connection attempt. It |
| 1786 | * will assign a server if required, queue the connection if required, and |
| 1787 | * handle errors that might arise at this level. It can change the server |
| 1788 | * state. It will return 1 if it encounters an error, switches the server |
| 1789 | * state, or has to queue a connection. Otherwise, it will return 0 indicating |
| 1790 | * that the connection is ready to use. |
| 1791 | */ |
| 1792 | |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 1793 | int srv_redispatch_connect(struct stream *s) |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1794 | { |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 1795 | struct server *srv; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1796 | int conn_err; |
| 1797 | |
| 1798 | /* We know that we don't have any connection pending, so we will |
| 1799 | * try to get a new one, and wait in this state if it's queued |
| 1800 | */ |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 1801 | redispatch: |
Willy Tarreau | f1fd9dc | 2014-04-24 20:47:57 +0200 | [diff] [blame] | 1802 | conn_err = assign_server_and_queue(s); |
| 1803 | srv = objt_server(s->target); |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 1804 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1805 | switch (conn_err) { |
| 1806 | case SRV_STATUS_OK: |
| 1807 | break; |
| 1808 | |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 1809 | case SRV_STATUS_FULL: |
| 1810 | /* The server has reached its maxqueue limit. Either PR_O_REDISP is set |
| 1811 | * and we can redispatch to another server, or it is not and we return |
| 1812 | * 503. This only makes sense in DIRECT mode however, because normal LB |
| 1813 | * algorithms would never select such a server, and hash algorithms |
Willy Tarreau | f1fd9dc | 2014-04-24 20:47:57 +0200 | [diff] [blame] | 1814 | * would bring us on the same server again. Note that s->target is set |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 1815 | * in this case. |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 1816 | */ |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 1817 | if (((s->flags & (SF_DIRECT|SF_FORCE_PRST)) == SF_DIRECT) && |
Willy Tarreau | f1fd9dc | 2014-04-24 20:47:57 +0200 | [diff] [blame] | 1818 | (s->be->options & PR_O_REDISP)) { |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 1819 | s->flags &= ~(SF_DIRECT | SF_ASSIGNED | SF_ADDR_SET); |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1820 | sockaddr_free(&(cs_si(s->csb)->dst)); |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 1821 | goto redispatch; |
| 1822 | } |
| 1823 | |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1824 | if (!cs_si(s->csb)->err_type) { |
| 1825 | cs_si(s->csb)->err_type = SI_ET_QUEUE_ERR; |
Willy Tarreau | fa7e102 | 2008-10-19 07:30:41 +0200 | [diff] [blame] | 1826 | } |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 1827 | |
Willy Tarreau | 4781b15 | 2021-04-06 13:53:36 +0200 | [diff] [blame] | 1828 | _HA_ATOMIC_INC(&srv->counters.failed_conns); |
| 1829 | _HA_ATOMIC_INC(&s->be->be_counters.failed_conns); |
Willy Tarreau | 7c669d7 | 2008-06-20 15:04:11 +0200 | [diff] [blame] | 1830 | return 1; |
| 1831 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1832 | case SRV_STATUS_NOSRV: |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 1833 | /* note: it is guaranteed that srv == NULL here */ |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1834 | if (!cs_si(s->csb)->err_type) { |
| 1835 | cs_si(s->csb)->err_type = SI_ET_CONN_ERR; |
Willy Tarreau | fa7e102 | 2008-10-19 07:30:41 +0200 | [diff] [blame] | 1836 | } |
Krzysztof Piotr Oledzki | 5a329cf | 2008-02-22 03:50:19 +0100 | [diff] [blame] | 1837 | |
Willy Tarreau | 4781b15 | 2021-04-06 13:53:36 +0200 | [diff] [blame] | 1838 | _HA_ATOMIC_INC(&s->be->be_counters.failed_conns); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1839 | return 1; |
| 1840 | |
| 1841 | case SRV_STATUS_QUEUED: |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1842 | cs_si(s->csb)->exp = tick_add_ifset(now_ms, s->be->timeout.queue); |
| 1843 | cs_si(s->csb)->state = SI_ST_QUE; |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 1844 | /* do nothing else and do not wake any other stream up */ |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1845 | return 1; |
| 1846 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1847 | case SRV_STATUS_INTERNAL: |
| 1848 | default: |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1849 | if (!cs_si(s->csb)->err_type) { |
| 1850 | cs_si(s->csb)->err_type = SI_ET_CONN_OTHER; |
Willy Tarreau | fa7e102 | 2008-10-19 07:30:41 +0200 | [diff] [blame] | 1851 | } |
| 1852 | |
Willy Tarreau | 827aee9 | 2011-03-10 16:55:02 +0100 | [diff] [blame] | 1853 | if (srv) |
| 1854 | srv_inc_sess_ctr(srv); |
| 1855 | if (srv) |
Bhaskar Maddala | a20cb85 | 2014-02-03 16:26:46 -0500 | [diff] [blame] | 1856 | srv_set_sess_last(srv); |
| 1857 | if (srv) |
Willy Tarreau | 4781b15 | 2021-04-06 13:53:36 +0200 | [diff] [blame] | 1858 | _HA_ATOMIC_INC(&srv->counters.failed_conns); |
| 1859 | _HA_ATOMIC_INC(&s->be->be_counters.failed_conns); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1860 | |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 1861 | /* release other streams waiting for this server */ |
Willy Tarreau | f1fd9dc | 2014-04-24 20:47:57 +0200 | [diff] [blame] | 1862 | if (may_dequeue_tasks(srv, s->be)) |
Willy Tarreau | 9ab7829 | 2021-06-22 18:47:51 +0200 | [diff] [blame] | 1863 | process_srv_queue(srv); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1864 | return 1; |
| 1865 | } |
| 1866 | /* if we get here, it's because we got SRV_STATUS_OK, which also |
| 1867 | * means that the connection has not been queued. |
| 1868 | */ |
| 1869 | return 0; |
| 1870 | } |
| 1871 | |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 1872 | /* Check if the connection request is in such a state that it can be aborted. */ |
| 1873 | static int back_may_abort_req(struct channel *req, struct stream *s) |
| 1874 | { |
| 1875 | return ((req->flags & (CF_READ_ERROR)) || |
| 1876 | ((req->flags & (CF_SHUTW_NOW|CF_SHUTW)) && /* empty and client aborted */ |
| 1877 | (channel_is_empty(req) || (s->be->options & PR_O_ABRT_CLOSE)))); |
| 1878 | } |
| 1879 | |
| 1880 | /* Update back stream interface status for input states SI_ST_ASS, SI_ST_QUE, |
| 1881 | * SI_ST_TAR. Other input states are simply ignored. |
| 1882 | * Possible output states are SI_ST_CLO, SI_ST_TAR, SI_ST_ASS, SI_ST_REQ, SI_ST_CON |
| 1883 | * and SI_ST_EST. Flags must have previously been updated for timeouts and other |
| 1884 | * conditions. |
| 1885 | */ |
| 1886 | void back_try_conn_req(struct stream *s) |
| 1887 | { |
| 1888 | struct server *srv = objt_server(s->target); |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 1889 | struct stream_interface *si = cs_si(s->csb); |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 1890 | struct channel *req = &s->req; |
| 1891 | |
| 1892 | DBG_TRACE_ENTER(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 1893 | |
| 1894 | if (si->state == SI_ST_ASS) { |
| 1895 | /* Server assigned to connection request, we have to try to connect now */ |
| 1896 | int conn_err; |
| 1897 | |
| 1898 | /* Before we try to initiate the connection, see if the |
| 1899 | * request may be aborted instead. |
| 1900 | */ |
| 1901 | if (back_may_abort_req(req, s)) { |
| 1902 | si->err_type |= SI_ET_CONN_ABRT; |
| 1903 | DBG_TRACE_STATE("connection aborted", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s); |
| 1904 | goto abort_connection; |
| 1905 | } |
| 1906 | |
| 1907 | conn_err = connect_server(s); |
| 1908 | srv = objt_server(s->target); |
| 1909 | |
| 1910 | if (conn_err == SF_ERR_NONE) { |
| 1911 | /* state = SI_ST_CON or SI_ST_EST now */ |
| 1912 | if (srv) |
| 1913 | srv_inc_sess_ctr(srv); |
| 1914 | if (srv) |
| 1915 | srv_set_sess_last(srv); |
| 1916 | DBG_TRACE_STATE("connection attempt", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 1917 | goto end; |
| 1918 | } |
| 1919 | |
| 1920 | /* We have received a synchronous error. We might have to |
| 1921 | * abort, retry immediately or redispatch. |
| 1922 | */ |
| 1923 | if (conn_err == SF_ERR_INTERNAL) { |
| 1924 | if (!si->err_type) { |
| 1925 | si->err_type = SI_ET_CONN_OTHER; |
| 1926 | } |
| 1927 | |
| 1928 | if (srv) |
| 1929 | srv_inc_sess_ctr(srv); |
| 1930 | if (srv) |
| 1931 | srv_set_sess_last(srv); |
| 1932 | if (srv) |
Willy Tarreau | 4781b15 | 2021-04-06 13:53:36 +0200 | [diff] [blame] | 1933 | _HA_ATOMIC_INC(&srv->counters.failed_conns); |
| 1934 | _HA_ATOMIC_INC(&s->be->be_counters.failed_conns); |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 1935 | |
| 1936 | /* release other streams waiting for this server */ |
| 1937 | sess_change_server(s, NULL); |
| 1938 | if (may_dequeue_tasks(srv, s->be)) |
Willy Tarreau | 9ab7829 | 2021-06-22 18:47:51 +0200 | [diff] [blame] | 1939 | process_srv_queue(srv); |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 1940 | |
| 1941 | /* Failed and not retryable. */ |
| 1942 | si_shutr(si); |
| 1943 | si_shutw(si); |
| 1944 | req->flags |= CF_WRITE_ERROR; |
| 1945 | |
| 1946 | s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now); |
| 1947 | |
| 1948 | /* we may need to know the position in the queue for logging */ |
| 1949 | pendconn_cond_unlink(s->pend_pos); |
| 1950 | |
| 1951 | /* no stream was ever accounted for this server */ |
| 1952 | si->state = SI_ST_CLO; |
| 1953 | if (s->srv_error) |
| 1954 | s->srv_error(s, si); |
| 1955 | DBG_TRACE_STATE("internal error during connection", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s); |
| 1956 | goto end; |
| 1957 | } |
| 1958 | |
| 1959 | /* We are facing a retryable error, but we don't want to run a |
| 1960 | * turn-around now, as the problem is likely a source port |
| 1961 | * allocation problem, so we want to retry now. |
| 1962 | */ |
| 1963 | si->state = SI_ST_CER; |
| 1964 | si->flags &= ~SI_FL_ERR; |
| 1965 | back_handle_st_cer(s); |
| 1966 | |
| 1967 | DBG_TRACE_STATE("connection error, retry", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s); |
| 1968 | /* now si->state is one of SI_ST_CLO, SI_ST_TAR, SI_ST_ASS, SI_ST_REQ */ |
| 1969 | } |
| 1970 | else if (si->state == SI_ST_QUE) { |
| 1971 | /* connection request was queued, check for any update */ |
| 1972 | if (!pendconn_dequeue(s)) { |
| 1973 | /* The connection is not in the queue anymore. Either |
| 1974 | * we have a server connection slot available and we |
| 1975 | * go directly to the assigned state, or we need to |
| 1976 | * load-balance first and go to the INI state. |
| 1977 | */ |
| 1978 | si->exp = TICK_ETERNITY; |
| 1979 | if (unlikely(!(s->flags & SF_ASSIGNED))) |
| 1980 | si->state = SI_ST_REQ; |
| 1981 | else { |
| 1982 | s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now); |
| 1983 | si->state = SI_ST_ASS; |
| 1984 | } |
| 1985 | DBG_TRACE_STATE("dequeue connection request", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 1986 | goto end; |
| 1987 | } |
| 1988 | |
| 1989 | /* Connection request still in queue... */ |
| 1990 | if (si->flags & SI_FL_EXP) { |
| 1991 | /* ... and timeout expired */ |
| 1992 | si->exp = TICK_ETERNITY; |
| 1993 | si->flags &= ~SI_FL_EXP; |
| 1994 | s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now); |
| 1995 | |
| 1996 | /* we may need to know the position in the queue for logging */ |
| 1997 | pendconn_cond_unlink(s->pend_pos); |
| 1998 | |
| 1999 | if (srv) |
Willy Tarreau | 4781b15 | 2021-04-06 13:53:36 +0200 | [diff] [blame] | 2000 | _HA_ATOMIC_INC(&srv->counters.failed_conns); |
| 2001 | _HA_ATOMIC_INC(&s->be->be_counters.failed_conns); |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2002 | si_shutr(si); |
| 2003 | si_shutw(si); |
| 2004 | req->flags |= CF_WRITE_TIMEOUT; |
| 2005 | if (!si->err_type) |
| 2006 | si->err_type = SI_ET_QUEUE_TO; |
| 2007 | si->state = SI_ST_CLO; |
| 2008 | if (s->srv_error) |
| 2009 | s->srv_error(s, si); |
| 2010 | DBG_TRACE_STATE("connection request still queued", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 2011 | goto end; |
| 2012 | } |
| 2013 | |
| 2014 | /* Connection remains in queue, check if we have to abort it */ |
| 2015 | if (back_may_abort_req(req, s)) { |
| 2016 | s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now); |
| 2017 | |
| 2018 | /* we may need to know the position in the queue for logging */ |
| 2019 | pendconn_cond_unlink(s->pend_pos); |
| 2020 | |
| 2021 | si->err_type |= SI_ET_QUEUE_ABRT; |
| 2022 | DBG_TRACE_STATE("abort queued connection request", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s); |
| 2023 | goto abort_connection; |
| 2024 | } |
| 2025 | |
| 2026 | /* Nothing changed */ |
| 2027 | } |
| 2028 | else if (si->state == SI_ST_TAR) { |
| 2029 | /* Connection request might be aborted */ |
| 2030 | if (back_may_abort_req(req, s)) { |
| 2031 | si->err_type |= SI_ET_CONN_ABRT; |
| 2032 | DBG_TRACE_STATE("connection aborted", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s); |
| 2033 | goto abort_connection; |
| 2034 | } |
| 2035 | |
| 2036 | if (!(si->flags & SI_FL_EXP)) |
| 2037 | return; /* still in turn-around */ |
| 2038 | |
| 2039 | si->flags &= ~SI_FL_EXP; |
| 2040 | si->exp = TICK_ETERNITY; |
| 2041 | |
| 2042 | /* we keep trying on the same server as long as the stream is |
| 2043 | * marked "assigned". |
| 2044 | * FIXME: Should we force a redispatch attempt when the server is down ? |
| 2045 | */ |
| 2046 | if (s->flags & SF_ASSIGNED) |
| 2047 | si->state = SI_ST_ASS; |
| 2048 | else |
| 2049 | si->state = SI_ST_REQ; |
| 2050 | |
| 2051 | DBG_TRACE_STATE("retry connection now", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 2052 | } |
| 2053 | |
| 2054 | end: |
| 2055 | DBG_TRACE_LEAVE(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 2056 | return; |
| 2057 | |
| 2058 | abort_connection: |
| 2059 | /* give up */ |
| 2060 | si->exp = TICK_ETERNITY; |
| 2061 | si->flags &= ~SI_FL_EXP; |
| 2062 | si_shutr(si); |
| 2063 | si_shutw(si); |
| 2064 | si->state = SI_ST_CLO; |
| 2065 | if (s->srv_error) |
| 2066 | s->srv_error(s, si); |
| 2067 | DBG_TRACE_DEVEL("leaving on error", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s); |
| 2068 | return; |
| 2069 | } |
| 2070 | |
| 2071 | /* This function initiates a server connection request on a stream interface |
| 2072 | * already in SI_ST_REQ state. Upon success, the state goes to SI_ST_ASS for |
| 2073 | * a real connection to a server, indicating that a server has been assigned, |
| 2074 | * or SI_ST_EST for a successful connection to an applet. It may also return |
| 2075 | * SI_ST_QUE, or SI_ST_CLO upon error. |
| 2076 | */ |
| 2077 | void back_handle_st_req(struct stream *s) |
| 2078 | { |
Christopher Faulet | 95a61e8 | 2021-12-22 14:22:03 +0100 | [diff] [blame] | 2079 | struct stream_interface *si = cs_si(s->csb); |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2080 | |
| 2081 | if (si->state != SI_ST_REQ) |
| 2082 | return; |
| 2083 | |
| 2084 | DBG_TRACE_ENTER(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 2085 | |
| 2086 | if (unlikely(obj_type(s->target) == OBJ_TYPE_APPLET)) { |
| 2087 | /* the applet directly goes to the EST state */ |
Christopher Faulet | 95a61e8 | 2021-12-22 14:22:03 +0100 | [diff] [blame] | 2088 | struct appctx *appctx = cs_appctx(s->csb); |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2089 | |
| 2090 | if (!appctx || appctx->applet != __objt_applet(s->target)) |
| 2091 | appctx = si_register_handler(si, objt_applet(s->target)); |
| 2092 | |
| 2093 | if (!appctx) { |
| 2094 | /* No more memory, let's immediately abort. Force the |
| 2095 | * error code to ignore the ERR_LOCAL which is not a |
| 2096 | * real error. |
| 2097 | */ |
| 2098 | s->flags &= ~(SF_ERR_MASK | SF_FINST_MASK); |
| 2099 | |
| 2100 | si_shutr(si); |
| 2101 | si_shutw(si); |
| 2102 | s->req.flags |= CF_WRITE_ERROR; |
| 2103 | si->err_type = SI_ET_CONN_RES; |
| 2104 | si->state = SI_ST_CLO; |
| 2105 | if (s->srv_error) |
| 2106 | s->srv_error(s, si); |
| 2107 | DBG_TRACE_STATE("failed to register applet", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s); |
| 2108 | goto end; |
| 2109 | } |
| 2110 | |
| 2111 | if (tv_iszero(&s->logs.tv_request)) |
| 2112 | s->logs.tv_request = now; |
| 2113 | s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now); |
| 2114 | si->state = SI_ST_EST; |
| 2115 | si->err_type = SI_ET_NONE; |
| 2116 | be_set_sess_last(s->be); |
| 2117 | |
| 2118 | DBG_TRACE_STATE("applet registered", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 2119 | /* let back_establish() finish the job */ |
| 2120 | goto end; |
| 2121 | } |
| 2122 | |
| 2123 | /* Try to assign a server */ |
| 2124 | if (srv_redispatch_connect(s) != 0) { |
| 2125 | /* We did not get a server. Either we queued the |
| 2126 | * connection request, or we encountered an error. |
| 2127 | */ |
| 2128 | if (si->state == SI_ST_QUE) { |
| 2129 | DBG_TRACE_STATE("connection request queued", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 2130 | goto end; |
| 2131 | } |
| 2132 | |
| 2133 | /* we did not get any server, let's check the cause */ |
| 2134 | si_shutr(si); |
| 2135 | si_shutw(si); |
| 2136 | s->req.flags |= CF_WRITE_ERROR; |
| 2137 | if (!si->err_type) |
| 2138 | si->err_type = SI_ET_CONN_OTHER; |
| 2139 | si->state = SI_ST_CLO; |
| 2140 | if (s->srv_error) |
| 2141 | s->srv_error(s, si); |
| 2142 | DBG_TRACE_STATE("connection request failed", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s); |
| 2143 | goto end; |
| 2144 | } |
| 2145 | |
| 2146 | /* The server is assigned */ |
| 2147 | s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now); |
| 2148 | si->state = SI_ST_ASS; |
| 2149 | be_set_sess_last(s->be); |
| 2150 | DBG_TRACE_STATE("connection request assigned to a server", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 2151 | |
| 2152 | end: |
| 2153 | DBG_TRACE_LEAVE(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 2154 | } |
| 2155 | |
| 2156 | /* This function is called with (si->state == SI_ST_CON) meaning that a |
| 2157 | * connection was attempted and that the file descriptor is already allocated. |
| 2158 | * We must check for timeout, error and abort. Possible output states are |
| 2159 | * SI_ST_CER (error), SI_ST_DIS (abort), and SI_ST_CON (no change). This only |
| 2160 | * works with connection-based streams. We know that there were no I/O event |
| 2161 | * when reaching this function. Timeouts and errors are *not* cleared. |
| 2162 | */ |
| 2163 | void back_handle_st_con(struct stream *s) |
| 2164 | { |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 2165 | struct stream_interface *si = cs_si(s->csb); |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2166 | struct channel *req = &s->req; |
| 2167 | struct channel *rep = &s->res; |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2168 | |
| 2169 | DBG_TRACE_ENTER(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 2170 | |
| 2171 | /* the client might want to abort */ |
| 2172 | if ((rep->flags & CF_SHUTW) || |
| 2173 | ((req->flags & CF_SHUTW_NOW) && |
| 2174 | (channel_is_empty(req) || (s->be->options & PR_O_ABRT_CLOSE)))) { |
| 2175 | si->flags |= SI_FL_NOLINGER; |
| 2176 | si_shutw(si); |
| 2177 | si->err_type |= SI_ET_CONN_ABRT; |
| 2178 | if (s->srv_error) |
| 2179 | s->srv_error(s, si); |
| 2180 | /* Note: state = SI_ST_DIS now */ |
| 2181 | DBG_TRACE_STATE("client abort during connection attempt", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s); |
Willy Tarreau | 062df2c | 2020-01-10 06:17:03 +0100 | [diff] [blame] | 2182 | goto end; |
| 2183 | } |
| 2184 | |
Willy Tarreau | 062df2c | 2020-01-10 06:17:03 +0100 | [diff] [blame] | 2185 | done: |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2186 | /* retryable error ? */ |
Willy Tarreau | 062df2c | 2020-01-10 06:17:03 +0100 | [diff] [blame] | 2187 | if (si->flags & (SI_FL_EXP|SI_FL_ERR)) { |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2188 | if (!si->err_type) { |
| 2189 | if (si->flags & SI_FL_ERR) |
| 2190 | si->err_type = SI_ET_CONN_ERR; |
| 2191 | else |
| 2192 | si->err_type = SI_ET_CONN_TO; |
| 2193 | } |
| 2194 | |
| 2195 | si->state = SI_ST_CER; |
| 2196 | DBG_TRACE_STATE("connection failed, retry", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s); |
| 2197 | } |
| 2198 | |
Willy Tarreau | 062df2c | 2020-01-10 06:17:03 +0100 | [diff] [blame] | 2199 | end: |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2200 | DBG_TRACE_LEAVE(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 2201 | } |
| 2202 | |
| 2203 | /* This function is called with (si->state == SI_ST_CER) meaning that a |
| 2204 | * previous connection attempt has failed and that the file descriptor |
| 2205 | * has already been released. Possible causes include asynchronous error |
| 2206 | * notification and time out. Possible output states are SI_ST_CLO when |
| 2207 | * retries are exhausted, SI_ST_TAR when a delay is wanted before a new |
| 2208 | * connection attempt, SI_ST_ASS when it's wise to retry on the same server, |
| 2209 | * and SI_ST_REQ when an immediate redispatch is wanted. The buffers are |
| 2210 | * marked as in error state. Timeouts and errors are cleared before retrying. |
| 2211 | */ |
| 2212 | void back_handle_st_cer(struct stream *s) |
| 2213 | { |
Christopher Faulet | 95a61e8 | 2021-12-22 14:22:03 +0100 | [diff] [blame] | 2214 | struct stream_interface *si = cs_si(s->csb); |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2215 | |
| 2216 | DBG_TRACE_ENTER(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 2217 | |
| 2218 | si->exp = TICK_ETERNITY; |
| 2219 | si->flags &= ~SI_FL_EXP; |
| 2220 | |
| 2221 | /* we probably have to release last stream from the server */ |
| 2222 | if (objt_server(s->target)) { |
Christopher Faulet | 95a61e8 | 2021-12-22 14:22:03 +0100 | [diff] [blame] | 2223 | struct connection *conn = cs_conn(s->csb); |
Christopher Faulet | 0256da1 | 2021-12-15 09:50:17 +0100 | [diff] [blame] | 2224 | |
Willy Tarreau | 88bc800 | 2021-12-06 07:01:02 +0000 | [diff] [blame] | 2225 | health_adjust(__objt_server(s->target), HANA_STATUS_L4_ERR); |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2226 | |
| 2227 | if (s->flags & SF_CURR_SESS) { |
| 2228 | s->flags &= ~SF_CURR_SESS; |
Willy Tarreau | 4781b15 | 2021-04-06 13:53:36 +0200 | [diff] [blame] | 2229 | _HA_ATOMIC_DEC(&__objt_server(s->target)->cur_sess); |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2230 | } |
| 2231 | |
| 2232 | if ((si->flags & SI_FL_ERR) && |
| 2233 | conn && conn->err_code == CO_ER_SSL_MISMATCH_SNI) { |
| 2234 | /* We tried to connect to a server which is configured |
| 2235 | * with "verify required" and which doesn't have the |
| 2236 | * "verifyhost" directive. The server presented a wrong |
| 2237 | * certificate (a certificate for an unexpected name), |
| 2238 | * which implies that we have used SNI in the handshake, |
| 2239 | * and that the server doesn't have the associated cert |
| 2240 | * and presented a default one. |
| 2241 | * |
| 2242 | * This is a serious enough issue not to retry. It's |
| 2243 | * especially important because this wrong name might |
| 2244 | * either be the result of a configuration error, and |
| 2245 | * retrying will only hammer the server, or is caused |
| 2246 | * by the use of a wrong SNI value, most likely |
| 2247 | * provided by the client and we don't want to let the |
| 2248 | * client provoke retries. |
| 2249 | */ |
| 2250 | si->conn_retries = 0; |
| 2251 | DBG_TRACE_DEVEL("Bad SSL cert, disable connection retries", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s); |
| 2252 | } |
| 2253 | } |
| 2254 | |
| 2255 | /* ensure that we have enough retries left */ |
| 2256 | si->conn_retries--; |
| 2257 | if (si->conn_retries < 0 || !(s->be->retry_type & PR_RE_CONN_FAILED)) { |
| 2258 | if (!si->err_type) { |
| 2259 | si->err_type = SI_ET_CONN_ERR; |
| 2260 | } |
| 2261 | |
| 2262 | if (objt_server(s->target)) |
Willy Tarreau | 4781b15 | 2021-04-06 13:53:36 +0200 | [diff] [blame] | 2263 | _HA_ATOMIC_INC(&objt_server(s->target)->counters.failed_conns); |
| 2264 | _HA_ATOMIC_INC(&s->be->be_counters.failed_conns); |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2265 | sess_change_server(s, NULL); |
| 2266 | if (may_dequeue_tasks(objt_server(s->target), s->be)) |
Willy Tarreau | 9ab7829 | 2021-06-22 18:47:51 +0200 | [diff] [blame] | 2267 | process_srv_queue(objt_server(s->target)); |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2268 | |
| 2269 | /* shutw is enough so stop a connecting socket */ |
| 2270 | si_shutw(si); |
| 2271 | s->req.flags |= CF_WRITE_ERROR; |
| 2272 | s->res.flags |= CF_READ_ERROR; |
| 2273 | |
| 2274 | si->state = SI_ST_CLO; |
| 2275 | if (s->srv_error) |
| 2276 | s->srv_error(s, si); |
| 2277 | |
| 2278 | DBG_TRACE_STATE("connection failed", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s); |
| 2279 | goto end; |
| 2280 | } |
| 2281 | |
Christopher Faulet | f822dec | 2021-06-01 14:06:05 +0200 | [diff] [blame] | 2282 | /* At this stage, we will trigger a connection retry (with or without |
Christopher Faulet | e00ad35 | 2021-12-16 14:44:31 +0100 | [diff] [blame] | 2283 | * redispatch). Thus we must reset the SI endpoint on the server side |
Christopher Faulet | f822dec | 2021-06-01 14:06:05 +0200 | [diff] [blame] | 2284 | * an close the attached connection. It is especially important to do it |
| 2285 | * now if the retry is not immediately performed, to be sure to release |
Ilya Shipitsin | 213bb99 | 2021-06-12 15:55:27 +0500 | [diff] [blame] | 2286 | * resources as soon as possible and to not catch errors from the lower |
Christopher Faulet | f822dec | 2021-06-01 14:06:05 +0200 | [diff] [blame] | 2287 | * layers in an unexpected state (i.e < ST_CONN). |
| 2288 | * |
| 2289 | * Note: the stream-interface will be switched to ST_REQ, ST_ASS or |
| 2290 | * ST_TAR and SI_FL_ERR and SI_FL_EXP flags will be unset. |
| 2291 | */ |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 2292 | si_reset_endpoint(cs_si(s->csb)); |
Christopher Faulet | f822dec | 2021-06-01 14:06:05 +0200 | [diff] [blame] | 2293 | |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2294 | stream_choose_redispatch(s); |
| 2295 | |
| 2296 | if (si->flags & SI_FL_ERR) { |
| 2297 | /* The error was an asynchronous connection error, and we will |
| 2298 | * likely have to retry connecting to the same server, most |
| 2299 | * likely leading to the same result. To avoid this, we wait |
| 2300 | * MIN(one second, connect timeout) before retrying. We don't |
| 2301 | * do it when the failure happened on a reused connection |
| 2302 | * though. |
| 2303 | */ |
| 2304 | |
| 2305 | int delay = 1000; |
Amaury Denoyelle | 2b1d917 | 2021-06-17 15:14:49 +0200 | [diff] [blame] | 2306 | const int reused = (s->flags & SF_SRV_REUSED) && |
| 2307 | !(s->flags & SF_SRV_REUSED_ANTICIPATED); |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2308 | |
| 2309 | if (s->be->timeout.connect && s->be->timeout.connect < delay) |
| 2310 | delay = s->be->timeout.connect; |
| 2311 | |
| 2312 | if (!si->err_type) |
| 2313 | si->err_type = SI_ET_CONN_ERR; |
| 2314 | |
| 2315 | /* only wait when we're retrying on the same server */ |
| 2316 | if ((si->state == SI_ST_ASS || |
| 2317 | (s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_RR || |
Amaury Denoyelle | 2b1d917 | 2021-06-17 15:14:49 +0200 | [diff] [blame] | 2318 | (s->be->srv_act <= 1)) && !reused) { |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2319 | si->state = SI_ST_TAR; |
| 2320 | si->exp = tick_add(now_ms, MS_TO_TICKS(delay)); |
| 2321 | } |
| 2322 | si->flags &= ~SI_FL_ERR; |
| 2323 | DBG_TRACE_STATE("retry a new connection", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 2324 | } |
| 2325 | |
| 2326 | end: |
| 2327 | DBG_TRACE_LEAVE(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 2328 | } |
| 2329 | |
| 2330 | /* This function is called with (si->state == SI_ST_RDY) meaning that a |
| 2331 | * connection was attempted, that the file descriptor is already allocated, |
| 2332 | * and that it has succeeded. We must still check for errors and aborts. |
| 2333 | * Possible output states are SI_ST_EST (established), SI_ST_CER (error), |
| 2334 | * and SI_ST_DIS (abort). This only works with connection-based streams. |
| 2335 | * Timeouts and errors are *not* cleared. |
| 2336 | */ |
| 2337 | void back_handle_st_rdy(struct stream *s) |
| 2338 | { |
Christopher Faulet | 4a0114b | 2021-12-23 12:24:35 +0100 | [diff] [blame] | 2339 | struct stream_interface *si = cs_si(s->csb); |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2340 | struct channel *req = &s->req; |
| 2341 | struct channel *rep = &s->res; |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2342 | |
| 2343 | DBG_TRACE_ENTER(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 2344 | /* We know the connection at least succeeded, though it could have |
| 2345 | * since met an error for any other reason. At least it didn't time out |
Thayne McCombs | 8f0cc5c | 2021-01-07 21:35:52 -0700 | [diff] [blame] | 2346 | * even though the timeout might have been reported right after success. |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2347 | * We need to take care of various situations here : |
| 2348 | * - everything might be OK. We have to switch to established. |
| 2349 | * - an I/O error might have been reported after a successful transfer, |
| 2350 | * which is not retryable and needs to be logged correctly, and needs |
| 2351 | * established as well |
| 2352 | * - SI_ST_CON implies !CF_WROTE_DATA but not conversely as we could |
| 2353 | * have validated a connection with incoming data (e.g. TCP with a |
| 2354 | * banner protocol), or just a successful connect() probe. |
| 2355 | * - the client might have requested a connection abort, this needs to |
| 2356 | * be checked before we decide to retry anything. |
| 2357 | */ |
| 2358 | |
| 2359 | /* it's still possible to handle client aborts or connection retries |
| 2360 | * before any data were sent. |
| 2361 | */ |
| 2362 | if (!(req->flags & CF_WROTE_DATA)) { |
| 2363 | /* client abort ? */ |
| 2364 | if ((rep->flags & CF_SHUTW) || |
| 2365 | ((req->flags & CF_SHUTW_NOW) && |
| 2366 | (channel_is_empty(req) || (s->be->options & PR_O_ABRT_CLOSE)))) { |
| 2367 | /* give up */ |
| 2368 | si->flags |= SI_FL_NOLINGER; |
| 2369 | si_shutw(si); |
| 2370 | si->err_type |= SI_ET_CONN_ABRT; |
| 2371 | if (s->srv_error) |
| 2372 | s->srv_error(s, si); |
| 2373 | DBG_TRACE_STATE("client abort during connection attempt", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s); |
| 2374 | goto end; |
| 2375 | } |
| 2376 | |
| 2377 | /* retryable error ? */ |
| 2378 | if (si->flags & SI_FL_ERR) { |
Willy Tarreau | 3a9312a | 2020-01-09 18:43:15 +0100 | [diff] [blame] | 2379 | if (!si->err_type) |
| 2380 | si->err_type = SI_ET_CONN_ERR; |
| 2381 | si->state = SI_ST_CER; |
| 2382 | DBG_TRACE_STATE("connection failed, retry", STRM_EV_STRM_PROC|STRM_EV_SI_ST|STRM_EV_STRM_ERR, s); |
| 2383 | goto end; |
| 2384 | } |
| 2385 | } |
| 2386 | |
| 2387 | /* data were sent and/or we had no error, back_establish() will |
| 2388 | * now take over. |
| 2389 | */ |
| 2390 | DBG_TRACE_STATE("connection established", STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 2391 | si->err_type = SI_ET_NONE; |
| 2392 | si->state = SI_ST_EST; |
| 2393 | |
| 2394 | end: |
| 2395 | DBG_TRACE_LEAVE(STRM_EV_STRM_PROC|STRM_EV_SI_ST, s); |
| 2396 | } |
| 2397 | |
Willy Tarreau | 4aac7db | 2014-05-16 11:48:10 +0200 | [diff] [blame] | 2398 | /* sends a log message when a backend goes down, and also sets last |
| 2399 | * change date. |
| 2400 | */ |
| 2401 | void set_backend_down(struct proxy *be) |
| 2402 | { |
| 2403 | be->last_change = now.tv_sec; |
Willy Tarreau | 4781b15 | 2021-04-06 13:53:36 +0200 | [diff] [blame] | 2404 | _HA_ATOMIC_INC(&be->down_trans); |
Willy Tarreau | 4aac7db | 2014-05-16 11:48:10 +0200 | [diff] [blame] | 2405 | |
Willy Tarreau | 6fb8dc1 | 2016-11-03 19:42:36 +0100 | [diff] [blame] | 2406 | if (!(global.mode & MODE_STARTING)) { |
Christopher Faulet | 767a84b | 2017-11-24 16:50:31 +0100 | [diff] [blame] | 2407 | ha_alert("%s '%s' has no server available!\n", proxy_type_str(be), be->id); |
Willy Tarreau | 6fb8dc1 | 2016-11-03 19:42:36 +0100 | [diff] [blame] | 2408 | send_log(be, LOG_EMERG, "%s %s has no server available!\n", proxy_type_str(be), be->id); |
| 2409 | } |
Willy Tarreau | 4aac7db | 2014-05-16 11:48:10 +0200 | [diff] [blame] | 2410 | } |
| 2411 | |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 2412 | /* Apply RDP cookie persistence to the current stream. For this, the function |
Willy Tarreau | 44b90cc | 2010-05-24 20:27:29 +0200 | [diff] [blame] | 2413 | * tries to extract an RDP cookie from the request buffer, and look for the |
| 2414 | * matching server in the list. If the server is found, it is assigned to the |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 2415 | * stream. This always returns 1, and the analyser removes itself from the |
Willy Tarreau | 44b90cc | 2010-05-24 20:27:29 +0200 | [diff] [blame] | 2416 | * list. Nothing is performed if a server was already assigned. |
| 2417 | */ |
Willy Tarreau | 87b0966 | 2015-04-03 00:22:06 +0200 | [diff] [blame] | 2418 | int tcp_persist_rdp_cookie(struct stream *s, struct channel *req, int an_bit) |
Willy Tarreau | 44b90cc | 2010-05-24 20:27:29 +0200 | [diff] [blame] | 2419 | { |
| 2420 | struct proxy *px = s->be; |
| 2421 | int ret; |
Willy Tarreau | 3740635 | 2012-04-23 16:16:37 +0200 | [diff] [blame] | 2422 | struct sample smp; |
Willy Tarreau | 44b90cc | 2010-05-24 20:27:29 +0200 | [diff] [blame] | 2423 | struct server *srv = px->srv; |
Willy Tarreau | 04276f3 | 2017-01-06 17:41:29 +0100 | [diff] [blame] | 2424 | uint16_t port; |
| 2425 | uint32_t addr; |
Willy Tarreau | 44b90cc | 2010-05-24 20:27:29 +0200 | [diff] [blame] | 2426 | char *p; |
| 2427 | |
Christopher Faulet | eea8fc7 | 2019-11-05 16:18:10 +0100 | [diff] [blame] | 2428 | DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_TCP_ANA, s); |
Willy Tarreau | 44b90cc | 2010-05-24 20:27:29 +0200 | [diff] [blame] | 2429 | |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2430 | if (s->flags & SF_ASSIGNED) |
Willy Tarreau | 44b90cc | 2010-05-24 20:27:29 +0200 | [diff] [blame] | 2431 | goto no_cookie; |
| 2432 | |
Willy Tarreau | 3740635 | 2012-04-23 16:16:37 +0200 | [diff] [blame] | 2433 | memset(&smp, 0, sizeof(smp)); |
Willy Tarreau | 44b90cc | 2010-05-24 20:27:29 +0200 | [diff] [blame] | 2434 | |
Willy Tarreau | cadd8c9 | 2013-07-22 18:09:52 +0200 | [diff] [blame] | 2435 | ret = fetch_rdp_cookie_name(s, &smp, s->be->rdp_cookie_name, s->be->rdp_cookie_len); |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 2436 | if (ret == 0 || (smp.flags & SMP_F_MAY_CHANGE) || smp.data.u.str.data == 0) |
Willy Tarreau | 44b90cc | 2010-05-24 20:27:29 +0200 | [diff] [blame] | 2437 | goto no_cookie; |
| 2438 | |
Willy Tarreau | 04276f3 | 2017-01-06 17:41:29 +0100 | [diff] [blame] | 2439 | /* Considering an rdp cookie detected using acl, str ended with <cr><lf> and should return. |
| 2440 | * The cookie format is <ip> "." <port> where "ip" is the integer corresponding to the |
| 2441 | * server's IP address in network order, and "port" is the integer corresponding to the |
| 2442 | * server's port in network order. Comments please Emeric. |
| 2443 | */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 2444 | addr = strtoul(smp.data.u.str.area, &p, 10); |
Willy Tarreau | 44b90cc | 2010-05-24 20:27:29 +0200 | [diff] [blame] | 2445 | if (*p != '.') |
| 2446 | goto no_cookie; |
| 2447 | p++; |
Willy Tarreau | 04276f3 | 2017-01-06 17:41:29 +0100 | [diff] [blame] | 2448 | |
| 2449 | port = ntohs(strtoul(p, &p, 10)); |
Willy Tarreau | 44b90cc | 2010-05-24 20:27:29 +0200 | [diff] [blame] | 2450 | if (*p != '.') |
| 2451 | goto no_cookie; |
| 2452 | |
Willy Tarreau | 3fdb366 | 2012-11-12 00:42:33 +0100 | [diff] [blame] | 2453 | s->target = NULL; |
Willy Tarreau | 44b90cc | 2010-05-24 20:27:29 +0200 | [diff] [blame] | 2454 | while (srv) { |
Willy Tarreau | 28e9d06 | 2014-05-09 22:47:50 +0200 | [diff] [blame] | 2455 | if (srv->addr.ss_family == AF_INET && |
Willy Tarreau | 04276f3 | 2017-01-06 17:41:29 +0100 | [diff] [blame] | 2456 | port == srv->svc_port && |
| 2457 | addr == ((struct sockaddr_in *)&srv->addr)->sin_addr.s_addr) { |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 2458 | if ((srv->cur_state != SRV_ST_STOPPED) || (px->options & PR_O_PERSIST)) { |
Willy Tarreau | 44b90cc | 2010-05-24 20:27:29 +0200 | [diff] [blame] | 2459 | /* we found the server and it is usable */ |
Willy Tarreau | e7dff02 | 2015-04-03 01:14:29 +0200 | [diff] [blame] | 2460 | s->flags |= SF_DIRECT | SF_ASSIGNED; |
Willy Tarreau | 3fdb366 | 2012-11-12 00:42:33 +0100 | [diff] [blame] | 2461 | s->target = &srv->obj_type; |
Willy Tarreau | 44b90cc | 2010-05-24 20:27:29 +0200 | [diff] [blame] | 2462 | break; |
| 2463 | } |
| 2464 | } |
| 2465 | srv = srv->next; |
| 2466 | } |
| 2467 | |
| 2468 | no_cookie: |
| 2469 | req->analysers &= ~an_bit; |
| 2470 | req->analyse_exp = TICK_ETERNITY; |
Christopher Faulet | eea8fc7 | 2019-11-05 16:18:10 +0100 | [diff] [blame] | 2471 | DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_TCP_ANA, s); |
Willy Tarreau | 44b90cc | 2010-05-24 20:27:29 +0200 | [diff] [blame] | 2472 | return 1; |
| 2473 | } |
| 2474 | |
Krzysztof Oledzki | 8513094 | 2007-10-22 16:21:10 +0200 | [diff] [blame] | 2475 | int be_downtime(struct proxy *px) { |
Willy Tarreau | b625a08 | 2007-11-26 01:15:43 +0100 | [diff] [blame] | 2476 | if (px->lbprm.tot_weight && px->last_change < now.tv_sec) // ignore negative time |
Krzysztof Oledzki | 8513094 | 2007-10-22 16:21:10 +0200 | [diff] [blame] | 2477 | return px->down_time; |
| 2478 | |
| 2479 | return now.tv_sec - px->last_change + px->down_time; |
| 2480 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 2481 | |
Krzysztof Piotr Oledzki | 15514c2 | 2010-01-04 16:03:09 +0100 | [diff] [blame] | 2482 | /* |
| 2483 | * This function returns a string containing the balancing |
| 2484 | * mode of the proxy in a format suitable for stats. |
| 2485 | */ |
| 2486 | |
| 2487 | const char *backend_lb_algo_str(int algo) { |
| 2488 | |
| 2489 | if (algo == BE_LB_ALGO_RR) |
| 2490 | return "roundrobin"; |
| 2491 | else if (algo == BE_LB_ALGO_SRR) |
| 2492 | return "static-rr"; |
Willy Tarreau | f09c660 | 2012-02-13 17:12:08 +0100 | [diff] [blame] | 2493 | else if (algo == BE_LB_ALGO_FAS) |
| 2494 | return "first"; |
Krzysztof Piotr Oledzki | 15514c2 | 2010-01-04 16:03:09 +0100 | [diff] [blame] | 2495 | else if (algo == BE_LB_ALGO_LC) |
| 2496 | return "leastconn"; |
| 2497 | else if (algo == BE_LB_ALGO_SH) |
| 2498 | return "source"; |
| 2499 | else if (algo == BE_LB_ALGO_UH) |
| 2500 | return "uri"; |
| 2501 | else if (algo == BE_LB_ALGO_PH) |
| 2502 | return "url_param"; |
| 2503 | else if (algo == BE_LB_ALGO_HH) |
| 2504 | return "hdr"; |
| 2505 | else if (algo == BE_LB_ALGO_RCH) |
| 2506 | return "rdp-cookie"; |
Willy Tarreau | b3e111b | 2016-11-26 15:52:04 +0100 | [diff] [blame] | 2507 | else if (algo == BE_LB_ALGO_NONE) |
| 2508 | return "none"; |
Krzysztof Piotr Oledzki | 15514c2 | 2010-01-04 16:03:09 +0100 | [diff] [blame] | 2509 | else |
Willy Tarreau | b3e111b | 2016-11-26 15:52:04 +0100 | [diff] [blame] | 2510 | return "unknown"; |
Krzysztof Piotr Oledzki | 15514c2 | 2010-01-04 16:03:09 +0100 | [diff] [blame] | 2511 | } |
| 2512 | |
Willy Tarreau | a0cbda6 | 2007-11-01 21:39:54 +0100 | [diff] [blame] | 2513 | /* This function parses a "balance" statement in a backend section describing |
| 2514 | * <curproxy>. It returns -1 if there is any error, otherwise zero. If it |
Willy Tarreau | a93c74b | 2012-05-08 18:14:39 +0200 | [diff] [blame] | 2515 | * returns -1, it will write an error message into the <err> buffer which will |
| 2516 | * automatically be allocated and must be passed as NULL. The trailing '\n' |
| 2517 | * will not be written. The function must be called with <args> pointing to the |
| 2518 | * first word after "balance". |
Willy Tarreau | a0cbda6 | 2007-11-01 21:39:54 +0100 | [diff] [blame] | 2519 | */ |
Willy Tarreau | a93c74b | 2012-05-08 18:14:39 +0200 | [diff] [blame] | 2520 | int backend_parse_balance(const char **args, char **err, struct proxy *curproxy) |
Willy Tarreau | a0cbda6 | 2007-11-01 21:39:54 +0100 | [diff] [blame] | 2521 | { |
| 2522 | if (!*(args[0])) { |
| 2523 | /* if no option is set, use round-robin by default */ |
Willy Tarreau | 3168223 | 2007-11-29 15:38:04 +0100 | [diff] [blame] | 2524 | curproxy->lbprm.algo &= ~BE_LB_ALGO; |
| 2525 | curproxy->lbprm.algo |= BE_LB_ALGO_RR; |
Willy Tarreau | a0cbda6 | 2007-11-01 21:39:54 +0100 | [diff] [blame] | 2526 | return 0; |
| 2527 | } |
| 2528 | |
Tim Duesterhus | e5ff141 | 2021-01-02 22:31:53 +0100 | [diff] [blame] | 2529 | if (strcmp(args[0], "roundrobin") == 0) { |
Willy Tarreau | 3168223 | 2007-11-29 15:38:04 +0100 | [diff] [blame] | 2530 | curproxy->lbprm.algo &= ~BE_LB_ALGO; |
| 2531 | curproxy->lbprm.algo |= BE_LB_ALGO_RR; |
Willy Tarreau | a0cbda6 | 2007-11-01 21:39:54 +0100 | [diff] [blame] | 2532 | } |
Tim Duesterhus | e5ff141 | 2021-01-02 22:31:53 +0100 | [diff] [blame] | 2533 | else if (strcmp(args[0], "static-rr") == 0) { |
Willy Tarreau | 9757a38 | 2009-10-03 12:56:50 +0200 | [diff] [blame] | 2534 | curproxy->lbprm.algo &= ~BE_LB_ALGO; |
| 2535 | curproxy->lbprm.algo |= BE_LB_ALGO_SRR; |
| 2536 | } |
Tim Duesterhus | e5ff141 | 2021-01-02 22:31:53 +0100 | [diff] [blame] | 2537 | else if (strcmp(args[0], "first") == 0) { |
Willy Tarreau | f09c660 | 2012-02-13 17:12:08 +0100 | [diff] [blame] | 2538 | curproxy->lbprm.algo &= ~BE_LB_ALGO; |
| 2539 | curproxy->lbprm.algo |= BE_LB_ALGO_FAS; |
| 2540 | } |
Tim Duesterhus | e5ff141 | 2021-01-02 22:31:53 +0100 | [diff] [blame] | 2541 | else if (strcmp(args[0], "leastconn") == 0) { |
Willy Tarreau | 5140623 | 2008-03-10 22:04:20 +0100 | [diff] [blame] | 2542 | curproxy->lbprm.algo &= ~BE_LB_ALGO; |
| 2543 | curproxy->lbprm.algo |= BE_LB_ALGO_LC; |
| 2544 | } |
Willy Tarreau | 21c741a | 2019-01-14 18:14:27 +0100 | [diff] [blame] | 2545 | else if (!strncmp(args[0], "random", 6)) { |
Willy Tarreau | 760e81d | 2018-05-03 07:20:40 +0200 | [diff] [blame] | 2546 | curproxy->lbprm.algo &= ~BE_LB_ALGO; |
| 2547 | curproxy->lbprm.algo |= BE_LB_ALGO_RND; |
Willy Tarreau | 21c741a | 2019-01-14 18:14:27 +0100 | [diff] [blame] | 2548 | curproxy->lbprm.arg_opt1 = 2; |
| 2549 | |
| 2550 | if (*(args[0] + 6) == '(' && *(args[0] + 7) != ')') { /* number of draws */ |
| 2551 | const char *beg; |
| 2552 | char *end; |
| 2553 | |
| 2554 | beg = args[0] + 7; |
| 2555 | curproxy->lbprm.arg_opt1 = strtol(beg, &end, 0); |
| 2556 | |
| 2557 | if (*end != ')') { |
| 2558 | if (!*end) |
| 2559 | memprintf(err, "random : missing closing parenthesis."); |
| 2560 | else |
| 2561 | memprintf(err, "random : unexpected character '%c' after argument.", *end); |
| 2562 | return -1; |
| 2563 | } |
| 2564 | |
| 2565 | if (curproxy->lbprm.arg_opt1 < 1) { |
| 2566 | memprintf(err, "random : number of draws must be at least 1."); |
| 2567 | return -1; |
| 2568 | } |
| 2569 | } |
Willy Tarreau | 760e81d | 2018-05-03 07:20:40 +0200 | [diff] [blame] | 2570 | } |
Tim Duesterhus | e5ff141 | 2021-01-02 22:31:53 +0100 | [diff] [blame] | 2571 | else if (strcmp(args[0], "source") == 0) { |
Willy Tarreau | 3168223 | 2007-11-29 15:38:04 +0100 | [diff] [blame] | 2572 | curproxy->lbprm.algo &= ~BE_LB_ALGO; |
| 2573 | curproxy->lbprm.algo |= BE_LB_ALGO_SH; |
Willy Tarreau | a0cbda6 | 2007-11-01 21:39:54 +0100 | [diff] [blame] | 2574 | } |
Tim Duesterhus | e5ff141 | 2021-01-02 22:31:53 +0100 | [diff] [blame] | 2575 | else if (strcmp(args[0], "uri") == 0) { |
Marek Majkowski | 9c30fc1 | 2008-04-27 23:25:55 +0200 | [diff] [blame] | 2576 | int arg = 1; |
| 2577 | |
Willy Tarreau | 3168223 | 2007-11-29 15:38:04 +0100 | [diff] [blame] | 2578 | curproxy->lbprm.algo &= ~BE_LB_ALGO; |
| 2579 | curproxy->lbprm.algo |= BE_LB_ALGO_UH; |
Willy Tarreau | 57a3741 | 2020-09-23 08:56:29 +0200 | [diff] [blame] | 2580 | curproxy->lbprm.arg_opt1 = 0; // "whole", "path-only" |
Willy Tarreau | a9a7249 | 2019-01-14 16:14:15 +0100 | [diff] [blame] | 2581 | curproxy->lbprm.arg_opt2 = 0; // "len" |
| 2582 | curproxy->lbprm.arg_opt3 = 0; // "depth" |
Oskar Stolc | 8dc4184 | 2012-05-19 10:19:54 +0100 | [diff] [blame] | 2583 | |
Marek Majkowski | 9c30fc1 | 2008-04-27 23:25:55 +0200 | [diff] [blame] | 2584 | while (*args[arg]) { |
Tim Duesterhus | e5ff141 | 2021-01-02 22:31:53 +0100 | [diff] [blame] | 2585 | if (strcmp(args[arg], "len") == 0) { |
Marek Majkowski | 9c30fc1 | 2008-04-27 23:25:55 +0200 | [diff] [blame] | 2586 | if (!*args[arg+1] || (atoi(args[arg+1]) <= 0)) { |
Willy Tarreau | a93c74b | 2012-05-08 18:14:39 +0200 | [diff] [blame] | 2587 | memprintf(err, "%s : '%s' expects a positive integer (got '%s').", args[0], args[arg], args[arg+1]); |
Marek Majkowski | 9c30fc1 | 2008-04-27 23:25:55 +0200 | [diff] [blame] | 2588 | return -1; |
| 2589 | } |
Willy Tarreau | a9a7249 | 2019-01-14 16:14:15 +0100 | [diff] [blame] | 2590 | curproxy->lbprm.arg_opt2 = atoi(args[arg+1]); |
Marek Majkowski | 9c30fc1 | 2008-04-27 23:25:55 +0200 | [diff] [blame] | 2591 | arg += 2; |
| 2592 | } |
Tim Duesterhus | e5ff141 | 2021-01-02 22:31:53 +0100 | [diff] [blame] | 2593 | else if (strcmp(args[arg], "depth") == 0) { |
Marek Majkowski | 9c30fc1 | 2008-04-27 23:25:55 +0200 | [diff] [blame] | 2594 | if (!*args[arg+1] || (atoi(args[arg+1]) <= 0)) { |
Willy Tarreau | a93c74b | 2012-05-08 18:14:39 +0200 | [diff] [blame] | 2595 | memprintf(err, "%s : '%s' expects a positive integer (got '%s').", args[0], args[arg], args[arg+1]); |
Marek Majkowski | 9c30fc1 | 2008-04-27 23:25:55 +0200 | [diff] [blame] | 2596 | return -1; |
| 2597 | } |
| 2598 | /* hint: we store the position of the ending '/' (depth+1) so |
| 2599 | * that we avoid a comparison while computing the hash. |
| 2600 | */ |
Willy Tarreau | a9a7249 | 2019-01-14 16:14:15 +0100 | [diff] [blame] | 2601 | curproxy->lbprm.arg_opt3 = atoi(args[arg+1]) + 1; |
Marek Majkowski | 9c30fc1 | 2008-04-27 23:25:55 +0200 | [diff] [blame] | 2602 | arg += 2; |
| 2603 | } |
Tim Duesterhus | e5ff141 | 2021-01-02 22:31:53 +0100 | [diff] [blame] | 2604 | else if (strcmp(args[arg], "whole") == 0) { |
Willy Tarreau | 3d1119d | 2020-09-23 08:05:47 +0200 | [diff] [blame] | 2605 | curproxy->lbprm.arg_opt1 |= 1; |
Oskar Stolc | 8dc4184 | 2012-05-19 10:19:54 +0100 | [diff] [blame] | 2606 | arg += 1; |
| 2607 | } |
Tim Duesterhus | e5ff141 | 2021-01-02 22:31:53 +0100 | [diff] [blame] | 2608 | else if (strcmp(args[arg], "path-only") == 0) { |
Willy Tarreau | 57a3741 | 2020-09-23 08:56:29 +0200 | [diff] [blame] | 2609 | curproxy->lbprm.arg_opt1 |= 2; |
| 2610 | arg += 1; |
| 2611 | } |
Marek Majkowski | 9c30fc1 | 2008-04-27 23:25:55 +0200 | [diff] [blame] | 2612 | else { |
Willy Tarreau | 57a3741 | 2020-09-23 08:56:29 +0200 | [diff] [blame] | 2613 | memprintf(err, "%s only accepts parameters 'len', 'depth', 'path-only', and 'whole' (got '%s').", args[0], args[arg]); |
Marek Majkowski | 9c30fc1 | 2008-04-27 23:25:55 +0200 | [diff] [blame] | 2614 | return -1; |
| 2615 | } |
| 2616 | } |
Willy Tarreau | a0cbda6 | 2007-11-01 21:39:54 +0100 | [diff] [blame] | 2617 | } |
Tim Duesterhus | e5ff141 | 2021-01-02 22:31:53 +0100 | [diff] [blame] | 2618 | else if (strcmp(args[0], "url_param") == 0) { |
Willy Tarreau | 0173280 | 2007-11-01 22:48:15 +0100 | [diff] [blame] | 2619 | if (!*args[1]) { |
Willy Tarreau | a93c74b | 2012-05-08 18:14:39 +0200 | [diff] [blame] | 2620 | memprintf(err, "%s requires an URL parameter name.", args[0]); |
Willy Tarreau | 0173280 | 2007-11-01 22:48:15 +0100 | [diff] [blame] | 2621 | return -1; |
| 2622 | } |
Willy Tarreau | 3168223 | 2007-11-29 15:38:04 +0100 | [diff] [blame] | 2623 | curproxy->lbprm.algo &= ~BE_LB_ALGO; |
| 2624 | curproxy->lbprm.algo |= BE_LB_ALGO_PH; |
Willy Tarreau | a534fea | 2008-08-03 12:19:50 +0200 | [diff] [blame] | 2625 | |
Willy Tarreau | 4c03d1c | 2019-01-14 15:23:54 +0100 | [diff] [blame] | 2626 | free(curproxy->lbprm.arg_str); |
| 2627 | curproxy->lbprm.arg_str = strdup(args[1]); |
| 2628 | curproxy->lbprm.arg_len = strlen(args[1]); |
Marek Majkowski | 9c30fc1 | 2008-04-27 23:25:55 +0200 | [diff] [blame] | 2629 | if (*args[2]) { |
Tim Duesterhus | e5ff141 | 2021-01-02 22:31:53 +0100 | [diff] [blame] | 2630 | if (strcmp(args[2], "check_post") != 0) { |
Willy Tarreau | a93c74b | 2012-05-08 18:14:39 +0200 | [diff] [blame] | 2631 | memprintf(err, "%s only accepts 'check_post' modifier (got '%s').", args[0], args[2]); |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 2632 | return -1; |
| 2633 | } |
matt.farnsworth@nokia.com | 1c2ab96 | 2008-04-14 20:47:37 +0200 | [diff] [blame] | 2634 | } |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 2635 | } |
| 2636 | else if (!strncmp(args[0], "hdr(", 4)) { |
| 2637 | const char *beg, *end; |
| 2638 | |
| 2639 | beg = args[0] + 4; |
| 2640 | end = strchr(beg, ')'); |
| 2641 | |
| 2642 | if (!end || end == beg) { |
Willy Tarreau | a93c74b | 2012-05-08 18:14:39 +0200 | [diff] [blame] | 2643 | memprintf(err, "hdr requires an http header field name."); |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 2644 | return -1; |
| 2645 | } |
| 2646 | |
| 2647 | curproxy->lbprm.algo &= ~BE_LB_ALGO; |
| 2648 | curproxy->lbprm.algo |= BE_LB_ALGO_HH; |
| 2649 | |
Willy Tarreau | 484ff07 | 2019-01-14 15:28:53 +0100 | [diff] [blame] | 2650 | free(curproxy->lbprm.arg_str); |
| 2651 | curproxy->lbprm.arg_len = end - beg; |
| 2652 | curproxy->lbprm.arg_str = my_strndup(beg, end - beg); |
Willy Tarreau | 9fed858 | 2019-01-14 16:04:54 +0100 | [diff] [blame] | 2653 | curproxy->lbprm.arg_opt1 = 0; |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 2654 | |
| 2655 | if (*args[1]) { |
Tim Duesterhus | e5ff141 | 2021-01-02 22:31:53 +0100 | [diff] [blame] | 2656 | if (strcmp(args[1], "use_domain_only") != 0) { |
Willy Tarreau | a93c74b | 2012-05-08 18:14:39 +0200 | [diff] [blame] | 2657 | memprintf(err, "%s only accepts 'use_domain_only' modifier (got '%s').", args[0], args[1]); |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 2658 | return -1; |
| 2659 | } |
Willy Tarreau | 9fed858 | 2019-01-14 16:04:54 +0100 | [diff] [blame] | 2660 | curproxy->lbprm.arg_opt1 = 1; |
Benoit | affb481 | 2009-03-25 13:02:10 +0100 | [diff] [blame] | 2661 | } |
Emeric Brun | 736aa23 | 2009-06-30 17:56:00 +0200 | [diff] [blame] | 2662 | } |
| 2663 | else if (!strncmp(args[0], "rdp-cookie", 10)) { |
| 2664 | curproxy->lbprm.algo &= ~BE_LB_ALGO; |
| 2665 | curproxy->lbprm.algo |= BE_LB_ALGO_RCH; |
| 2666 | |
| 2667 | if ( *(args[0] + 10 ) == '(' ) { /* cookie name */ |
| 2668 | const char *beg, *end; |
| 2669 | |
| 2670 | beg = args[0] + 11; |
| 2671 | end = strchr(beg, ')'); |
| 2672 | |
| 2673 | if (!end || end == beg) { |
Willy Tarreau | a93c74b | 2012-05-08 18:14:39 +0200 | [diff] [blame] | 2674 | memprintf(err, "rdp-cookie : missing cookie name."); |
Emeric Brun | 736aa23 | 2009-06-30 17:56:00 +0200 | [diff] [blame] | 2675 | return -1; |
| 2676 | } |
| 2677 | |
Willy Tarreau | 484ff07 | 2019-01-14 15:28:53 +0100 | [diff] [blame] | 2678 | free(curproxy->lbprm.arg_str); |
| 2679 | curproxy->lbprm.arg_str = my_strndup(beg, end - beg); |
| 2680 | curproxy->lbprm.arg_len = end - beg; |
Emeric Brun | 736aa23 | 2009-06-30 17:56:00 +0200 | [diff] [blame] | 2681 | } |
| 2682 | else if ( *(args[0] + 10 ) == '\0' ) { /* default cookie name 'mstshash' */ |
Willy Tarreau | 484ff07 | 2019-01-14 15:28:53 +0100 | [diff] [blame] | 2683 | free(curproxy->lbprm.arg_str); |
| 2684 | curproxy->lbprm.arg_str = strdup("mstshash"); |
| 2685 | curproxy->lbprm.arg_len = strlen(curproxy->lbprm.arg_str); |
Emeric Brun | 736aa23 | 2009-06-30 17:56:00 +0200 | [diff] [blame] | 2686 | } |
| 2687 | else { /* syntax */ |
Willy Tarreau | a93c74b | 2012-05-08 18:14:39 +0200 | [diff] [blame] | 2688 | memprintf(err, "rdp-cookie : missing cookie name."); |
Emeric Brun | 736aa23 | 2009-06-30 17:56:00 +0200 | [diff] [blame] | 2689 | return -1; |
| 2690 | } |
Willy Tarreau | 0173280 | 2007-11-01 22:48:15 +0100 | [diff] [blame] | 2691 | } |
Willy Tarreau | a0cbda6 | 2007-11-01 21:39:54 +0100 | [diff] [blame] | 2692 | else { |
Willy Tarreau | a93c74b | 2012-05-08 18:14:39 +0200 | [diff] [blame] | 2693 | memprintf(err, "only supports 'roundrobin', 'static-rr', 'leastconn', 'source', 'uri', 'url_param', 'hdr(name)' and 'rdp-cookie(name)' options."); |
Willy Tarreau | a0cbda6 | 2007-11-01 21:39:54 +0100 | [diff] [blame] | 2694 | return -1; |
| 2695 | } |
| 2696 | return 0; |
| 2697 | } |
| 2698 | |
Willy Tarreau | a9d3c1e | 2007-11-30 20:48:53 +0100 | [diff] [blame] | 2699 | |
| 2700 | /************************************************************************/ |
Willy Tarreau | 1a7eca1 | 2013-01-07 22:38:03 +0100 | [diff] [blame] | 2701 | /* All supported sample and ACL keywords must be declared here. */ |
Willy Tarreau | a9d3c1e | 2007-11-30 20:48:53 +0100 | [diff] [blame] | 2702 | /************************************************************************/ |
| 2703 | |
Willy Tarreau | 34db108 | 2012-04-19 17:16:54 +0200 | [diff] [blame] | 2704 | /* set temp integer to the number of enabled servers on the proxy. |
Willy Tarreau | 0146c2e | 2012-04-20 11:37:56 +0200 | [diff] [blame] | 2705 | * Accepts exactly 1 argument. Argument is a backend, other types will lead to |
Willy Tarreau | 34db108 | 2012-04-19 17:16:54 +0200 | [diff] [blame] | 2706 | * undefined behaviour. |
| 2707 | */ |
Willy Tarreau | a9d3c1e | 2007-11-30 20:48:53 +0100 | [diff] [blame] | 2708 | static int |
Thierry FOURNIER | 0786d05 | 2015-05-11 15:42:45 +0200 | [diff] [blame] | 2709 | smp_fetch_nbsrv(const struct arg *args, struct sample *smp, const char *kw, void *private) |
Willy Tarreau | a9d3c1e | 2007-11-30 20:48:53 +0100 | [diff] [blame] | 2710 | { |
Christopher Faulet | 37a9e21 | 2021-10-12 18:48:05 +0200 | [diff] [blame] | 2711 | struct proxy *px = args->data.prx; |
| 2712 | |
| 2713 | if (px == NULL) |
| 2714 | return 0; |
| 2715 | if (px->cap & PR_CAP_DEF) |
| 2716 | px = smp->px; |
Thierry FOURNIER | 0a9a2b8 | 2015-05-11 15:20:49 +0200 | [diff] [blame] | 2717 | |
Willy Tarreau | 3740635 | 2012-04-23 16:16:37 +0200 | [diff] [blame] | 2718 | smp->flags = SMP_F_VOL_TEST; |
Thierry FOURNIER | 8c542ca | 2015-08-19 09:00:18 +0200 | [diff] [blame] | 2719 | smp->data.type = SMP_T_SINT; |
Willy Tarreau | a9d3c1e | 2007-11-30 20:48:53 +0100 | [diff] [blame] | 2720 | |
Nenad Merdanovic | 2754fbc | 2017-03-12 21:56:56 +0100 | [diff] [blame] | 2721 | smp->data.u.sint = be_usable_srv(px); |
Willy Tarreau | a9d3c1e | 2007-11-30 20:48:53 +0100 | [diff] [blame] | 2722 | |
| 2723 | return 1; |
| 2724 | } |
| 2725 | |
Willy Tarreau | 3740635 | 2012-04-23 16:16:37 +0200 | [diff] [blame] | 2726 | /* report in smp->flags a success or failure depending on the designated |
Willy Tarreau | 0b1cd94 | 2010-05-16 22:18:27 +0200 | [diff] [blame] | 2727 | * server's state. There is no match function involved since there's no pattern. |
Willy Tarreau | 34db108 | 2012-04-19 17:16:54 +0200 | [diff] [blame] | 2728 | * Accepts exactly 1 argument. Argument is a server, other types will lead to |
| 2729 | * undefined behaviour. |
Willy Tarreau | 0b1cd94 | 2010-05-16 22:18:27 +0200 | [diff] [blame] | 2730 | */ |
| 2731 | static int |
Thierry FOURNIER | 0786d05 | 2015-05-11 15:42:45 +0200 | [diff] [blame] | 2732 | smp_fetch_srv_is_up(const struct arg *args, struct sample *smp, const char *kw, void *private) |
Willy Tarreau | 0b1cd94 | 2010-05-16 22:18:27 +0200 | [diff] [blame] | 2733 | { |
Willy Tarreau | 24e32d8 | 2012-04-23 23:55:44 +0200 | [diff] [blame] | 2734 | struct server *srv = args->data.srv; |
Willy Tarreau | 0b1cd94 | 2010-05-16 22:18:27 +0200 | [diff] [blame] | 2735 | |
Willy Tarreau | 3740635 | 2012-04-23 16:16:37 +0200 | [diff] [blame] | 2736 | smp->flags = SMP_F_VOL_TEST; |
Thierry FOURNIER | 8c542ca | 2015-08-19 09:00:18 +0200 | [diff] [blame] | 2737 | smp->data.type = SMP_T_BOOL; |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 2738 | if (!(srv->cur_admin & SRV_ADMF_MAINT) && |
| 2739 | (!(srv->check.state & CHK_ST_CONFIGURED) || (srv->cur_state != SRV_ST_STOPPED))) |
Thierry FOURNIER | 136f9d3 | 2015-08-19 09:07:19 +0200 | [diff] [blame] | 2740 | smp->data.u.sint = 1; |
Willy Tarreau | 0b1cd94 | 2010-05-16 22:18:27 +0200 | [diff] [blame] | 2741 | else |
Thierry FOURNIER | 136f9d3 | 2015-08-19 09:07:19 +0200 | [diff] [blame] | 2742 | smp->data.u.sint = 0; |
Willy Tarreau | 0b1cd94 | 2010-05-16 22:18:27 +0200 | [diff] [blame] | 2743 | return 1; |
| 2744 | } |
| 2745 | |
Willy Tarreau | 34db108 | 2012-04-19 17:16:54 +0200 | [diff] [blame] | 2746 | /* set temp integer to the number of enabled servers on the proxy. |
Willy Tarreau | 0146c2e | 2012-04-20 11:37:56 +0200 | [diff] [blame] | 2747 | * Accepts exactly 1 argument. Argument is a backend, other types will lead to |
Willy Tarreau | 34db108 | 2012-04-19 17:16:54 +0200 | [diff] [blame] | 2748 | * undefined behaviour. |
| 2749 | */ |
Jeffrey 'jf' Lim | 5051d7b | 2008-09-04 01:03:03 +0800 | [diff] [blame] | 2750 | static int |
Thierry FOURNIER | 0786d05 | 2015-05-11 15:42:45 +0200 | [diff] [blame] | 2751 | smp_fetch_connslots(const struct arg *args, struct sample *smp, const char *kw, void *private) |
Jeffrey 'jf' Lim | 5051d7b | 2008-09-04 01:03:03 +0800 | [diff] [blame] | 2752 | { |
| 2753 | struct server *iterator; |
Christopher Faulet | 37a9e21 | 2021-10-12 18:48:05 +0200 | [diff] [blame] | 2754 | struct proxy *px = args->data.prx; |
| 2755 | |
| 2756 | if (px == NULL) |
| 2757 | return 0; |
| 2758 | if (px->cap & PR_CAP_DEF) |
| 2759 | px = smp->px; |
Willy Tarreau | d28c353 | 2012-04-19 19:28:33 +0200 | [diff] [blame] | 2760 | |
Willy Tarreau | 3740635 | 2012-04-23 16:16:37 +0200 | [diff] [blame] | 2761 | smp->flags = SMP_F_VOL_TEST; |
Thierry FOURNIER | 8c542ca | 2015-08-19 09:00:18 +0200 | [diff] [blame] | 2762 | smp->data.type = SMP_T_SINT; |
Thierry FOURNIER | 136f9d3 | 2015-08-19 09:07:19 +0200 | [diff] [blame] | 2763 | smp->data.u.sint = 0; |
Willy Tarreau | 0146c2e | 2012-04-20 11:37:56 +0200 | [diff] [blame] | 2764 | |
Christopher Faulet | 37a9e21 | 2021-10-12 18:48:05 +0200 | [diff] [blame] | 2765 | for (iterator = px->srv; iterator; iterator = iterator->next) { |
Emeric Brun | 52a91d3 | 2017-08-31 14:41:55 +0200 | [diff] [blame] | 2766 | if (iterator->cur_state == SRV_ST_STOPPED) |
Jeffrey 'jf' Lim | 5051d7b | 2008-09-04 01:03:03 +0800 | [diff] [blame] | 2767 | continue; |
Willy Tarreau | 0146c2e | 2012-04-20 11:37:56 +0200 | [diff] [blame] | 2768 | |
Jeffrey 'jf' Lim | 5051d7b | 2008-09-04 01:03:03 +0800 | [diff] [blame] | 2769 | if (iterator->maxconn == 0 || iterator->maxqueue == 0) { |
Willy Tarreau | a5e3756 | 2011-12-16 17:06:15 +0100 | [diff] [blame] | 2770 | /* configuration is stupid */ |
Thierry FOURNIER | 136f9d3 | 2015-08-19 09:07:19 +0200 | [diff] [blame] | 2771 | smp->data.u.sint = -1; /* FIXME: stupid value! */ |
Jeffrey 'jf' Lim | 5051d7b | 2008-09-04 01:03:03 +0800 | [diff] [blame] | 2772 | return 1; |
| 2773 | } |
| 2774 | |
Thierry FOURNIER | 136f9d3 | 2015-08-19 09:07:19 +0200 | [diff] [blame] | 2775 | smp->data.u.sint += (iterator->maxconn - iterator->cur_sess) |
Willy Tarreau | a057045 | 2021-06-18 09:30:30 +0200 | [diff] [blame] | 2776 | + (iterator->maxqueue - iterator->queue.length); |
Jeffrey 'jf' Lim | 5051d7b | 2008-09-04 01:03:03 +0800 | [diff] [blame] | 2777 | } |
| 2778 | |
| 2779 | return 1; |
| 2780 | } |
| 2781 | |
Willy Tarreau | a5e3756 | 2011-12-16 17:06:15 +0100 | [diff] [blame] | 2782 | /* set temp integer to the id of the backend */ |
Hervé COMMOWICK | 35ed801 | 2010-12-15 14:04:51 +0100 | [diff] [blame] | 2783 | static int |
Thierry FOURNIER | 0786d05 | 2015-05-11 15:42:45 +0200 | [diff] [blame] | 2784 | smp_fetch_be_id(const struct arg *args, struct sample *smp, const char *kw, void *private) |
Willy Tarreau | 3740635 | 2012-04-23 16:16:37 +0200 | [diff] [blame] | 2785 | { |
Christopher Faulet | d1b4464 | 2020-04-30 09:51:15 +0200 | [diff] [blame] | 2786 | struct proxy *px = NULL; |
| 2787 | |
| 2788 | if (smp->strm) |
| 2789 | px = smp->strm->be; |
Christopher Faulet | f98e626 | 2020-05-06 09:42:04 +0200 | [diff] [blame] | 2790 | else if (obj_type(smp->sess->origin) == OBJ_TYPE_CHECK) |
Christopher Faulet | d1b4464 | 2020-04-30 09:51:15 +0200 | [diff] [blame] | 2791 | px = __objt_check(smp->sess->origin)->proxy; |
| 2792 | if (!px) |
Willy Tarreau | be508f1 | 2016-03-10 11:47:01 +0100 | [diff] [blame] | 2793 | return 0; |
| 2794 | |
Willy Tarreau | f853c46 | 2012-04-23 18:53:56 +0200 | [diff] [blame] | 2795 | smp->flags = SMP_F_VOL_TXN; |
Thierry FOURNIER | 8c542ca | 2015-08-19 09:00:18 +0200 | [diff] [blame] | 2796 | smp->data.type = SMP_T_SINT; |
Christopher Faulet | d1b4464 | 2020-04-30 09:51:15 +0200 | [diff] [blame] | 2797 | smp->data.u.sint = px->uuid; |
Hervé COMMOWICK | 35ed801 | 2010-12-15 14:04:51 +0100 | [diff] [blame] | 2798 | return 1; |
| 2799 | } |
| 2800 | |
Marcin Deranek | d2471c2 | 2016-12-12 14:08:05 +0100 | [diff] [blame] | 2801 | /* set string to the name of the backend */ |
| 2802 | static int |
| 2803 | smp_fetch_be_name(const struct arg *args, struct sample *smp, const char *kw, void *private) |
| 2804 | { |
Christopher Faulet | d1b4464 | 2020-04-30 09:51:15 +0200 | [diff] [blame] | 2805 | struct proxy *px = NULL; |
| 2806 | |
| 2807 | if (smp->strm) |
| 2808 | px = smp->strm->be; |
Christopher Faulet | f98e626 | 2020-05-06 09:42:04 +0200 | [diff] [blame] | 2809 | else if (obj_type(smp->sess->origin) == OBJ_TYPE_CHECK) |
Christopher Faulet | d1b4464 | 2020-04-30 09:51:15 +0200 | [diff] [blame] | 2810 | px = __objt_check(smp->sess->origin)->proxy; |
| 2811 | if (!px) |
Marcin Deranek | d2471c2 | 2016-12-12 14:08:05 +0100 | [diff] [blame] | 2812 | return 0; |
| 2813 | |
Christopher Faulet | d1b4464 | 2020-04-30 09:51:15 +0200 | [diff] [blame] | 2814 | smp->data.u.str.area = (char *)px->id; |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 2815 | if (!smp->data.u.str.area) |
Marcin Deranek | d2471c2 | 2016-12-12 14:08:05 +0100 | [diff] [blame] | 2816 | return 0; |
| 2817 | |
| 2818 | smp->data.type = SMP_T_STR; |
| 2819 | smp->flags = SMP_F_CONST; |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 2820 | smp->data.u.str.data = strlen(smp->data.u.str.area); |
Marcin Deranek | d2471c2 | 2016-12-12 14:08:05 +0100 | [diff] [blame] | 2821 | |
| 2822 | return 1; |
| 2823 | } |
| 2824 | |
Willy Tarreau | a5e3756 | 2011-12-16 17:06:15 +0100 | [diff] [blame] | 2825 | /* set temp integer to the id of the server */ |
Hervé COMMOWICK | 35ed801 | 2010-12-15 14:04:51 +0100 | [diff] [blame] | 2826 | static int |
Thierry FOURNIER | 0786d05 | 2015-05-11 15:42:45 +0200 | [diff] [blame] | 2827 | smp_fetch_srv_id(const struct arg *args, struct sample *smp, const char *kw, void *private) |
Willy Tarreau | 3740635 | 2012-04-23 16:16:37 +0200 | [diff] [blame] | 2828 | { |
Christopher Faulet | d1b4464 | 2020-04-30 09:51:15 +0200 | [diff] [blame] | 2829 | struct server *srv = NULL; |
Willy Tarreau | be508f1 | 2016-03-10 11:47:01 +0100 | [diff] [blame] | 2830 | |
Christopher Faulet | d1b4464 | 2020-04-30 09:51:15 +0200 | [diff] [blame] | 2831 | if (smp->strm) |
| 2832 | srv = objt_server(smp->strm->target); |
Christopher Faulet | f98e626 | 2020-05-06 09:42:04 +0200 | [diff] [blame] | 2833 | else if (obj_type(smp->sess->origin) == OBJ_TYPE_CHECK) |
Christopher Faulet | d1b4464 | 2020-04-30 09:51:15 +0200 | [diff] [blame] | 2834 | srv = __objt_check(smp->sess->origin)->server; |
| 2835 | if (!srv) |
Willy Tarreau | 17af419 | 2011-02-23 14:27:06 +0100 | [diff] [blame] | 2836 | return 0; |
| 2837 | |
Thierry FOURNIER | 8c542ca | 2015-08-19 09:00:18 +0200 | [diff] [blame] | 2838 | smp->data.type = SMP_T_SINT; |
Christopher Faulet | d1b4464 | 2020-04-30 09:51:15 +0200 | [diff] [blame] | 2839 | smp->data.u.sint = srv->puid; |
Hervé COMMOWICK | 35ed801 | 2010-12-15 14:04:51 +0100 | [diff] [blame] | 2840 | |
| 2841 | return 1; |
| 2842 | } |
| 2843 | |
vkill | 1dfd165 | 2019-10-30 16:58:14 +0800 | [diff] [blame] | 2844 | /* set string to the name of the server */ |
| 2845 | static int |
| 2846 | smp_fetch_srv_name(const struct arg *args, struct sample *smp, const char *kw, void *private) |
| 2847 | { |
Christopher Faulet | d1b4464 | 2020-04-30 09:51:15 +0200 | [diff] [blame] | 2848 | struct server *srv = NULL; |
vkill | 1dfd165 | 2019-10-30 16:58:14 +0800 | [diff] [blame] | 2849 | |
Christopher Faulet | d1b4464 | 2020-04-30 09:51:15 +0200 | [diff] [blame] | 2850 | if (smp->strm) |
| 2851 | srv = objt_server(smp->strm->target); |
Christopher Faulet | f98e626 | 2020-05-06 09:42:04 +0200 | [diff] [blame] | 2852 | else if (obj_type(smp->sess->origin) == OBJ_TYPE_CHECK) |
Christopher Faulet | d1b4464 | 2020-04-30 09:51:15 +0200 | [diff] [blame] | 2853 | srv = __objt_check(smp->sess->origin)->server; |
| 2854 | if (!srv) |
vkill | 1dfd165 | 2019-10-30 16:58:14 +0800 | [diff] [blame] | 2855 | return 0; |
| 2856 | |
Christopher Faulet | d1b4464 | 2020-04-30 09:51:15 +0200 | [diff] [blame] | 2857 | smp->data.u.str.area = srv->id; |
vkill | 1dfd165 | 2019-10-30 16:58:14 +0800 | [diff] [blame] | 2858 | if (!smp->data.u.str.area) |
| 2859 | return 0; |
| 2860 | |
| 2861 | smp->data.type = SMP_T_STR; |
| 2862 | smp->data.u.str.data = strlen(smp->data.u.str.area); |
| 2863 | |
| 2864 | return 1; |
| 2865 | } |
| 2866 | |
Willy Tarreau | 34db108 | 2012-04-19 17:16:54 +0200 | [diff] [blame] | 2867 | /* set temp integer to the number of connections per second reaching the backend. |
Willy Tarreau | 0146c2e | 2012-04-20 11:37:56 +0200 | [diff] [blame] | 2868 | * Accepts exactly 1 argument. Argument is a backend, other types will lead to |
Willy Tarreau | 34db108 | 2012-04-19 17:16:54 +0200 | [diff] [blame] | 2869 | * undefined behaviour. |
| 2870 | */ |
Willy Tarreau | 079ff0a | 2009-03-05 21:34:28 +0100 | [diff] [blame] | 2871 | static int |
Thierry FOURNIER | 0786d05 | 2015-05-11 15:42:45 +0200 | [diff] [blame] | 2872 | smp_fetch_be_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private) |
Willy Tarreau | 079ff0a | 2009-03-05 21:34:28 +0100 | [diff] [blame] | 2873 | { |
Christopher Faulet | 37a9e21 | 2021-10-12 18:48:05 +0200 | [diff] [blame] | 2874 | struct proxy *px = args->data.prx; |
| 2875 | |
| 2876 | if (px == NULL) |
| 2877 | return 0; |
| 2878 | if (px->cap & PR_CAP_DEF) |
| 2879 | px = smp->px; |
| 2880 | |
Willy Tarreau | 3740635 | 2012-04-23 16:16:37 +0200 | [diff] [blame] | 2881 | smp->flags = SMP_F_VOL_TEST; |
Thierry FOURNIER | 8c542ca | 2015-08-19 09:00:18 +0200 | [diff] [blame] | 2882 | smp->data.type = SMP_T_SINT; |
Christopher Faulet | 37a9e21 | 2021-10-12 18:48:05 +0200 | [diff] [blame] | 2883 | smp->data.u.sint = read_freq_ctr(&px->be_sess_per_sec); |
Willy Tarreau | 079ff0a | 2009-03-05 21:34:28 +0100 | [diff] [blame] | 2884 | return 1; |
| 2885 | } |
| 2886 | |
Willy Tarreau | 34db108 | 2012-04-19 17:16:54 +0200 | [diff] [blame] | 2887 | /* set temp integer to the number of concurrent connections on the backend. |
Willy Tarreau | 0146c2e | 2012-04-20 11:37:56 +0200 | [diff] [blame] | 2888 | * Accepts exactly 1 argument. Argument is a backend, other types will lead to |
Willy Tarreau | 34db108 | 2012-04-19 17:16:54 +0200 | [diff] [blame] | 2889 | * undefined behaviour. |
| 2890 | */ |
Willy Tarreau | a36af91 | 2009-10-10 12:02:45 +0200 | [diff] [blame] | 2891 | static int |
Thierry FOURNIER | 0786d05 | 2015-05-11 15:42:45 +0200 | [diff] [blame] | 2892 | smp_fetch_be_conn(const struct arg *args, struct sample *smp, const char *kw, void *private) |
Willy Tarreau | a36af91 | 2009-10-10 12:02:45 +0200 | [diff] [blame] | 2893 | { |
Christopher Faulet | 37a9e21 | 2021-10-12 18:48:05 +0200 | [diff] [blame] | 2894 | struct proxy *px = args->data.prx; |
| 2895 | |
| 2896 | if (px == NULL) |
| 2897 | return 0; |
| 2898 | if (px->cap & PR_CAP_DEF) |
| 2899 | px = smp->px; |
| 2900 | |
Willy Tarreau | 3740635 | 2012-04-23 16:16:37 +0200 | [diff] [blame] | 2901 | smp->flags = SMP_F_VOL_TEST; |
Thierry FOURNIER | 8c542ca | 2015-08-19 09:00:18 +0200 | [diff] [blame] | 2902 | smp->data.type = SMP_T_SINT; |
Christopher Faulet | 37a9e21 | 2021-10-12 18:48:05 +0200 | [diff] [blame] | 2903 | smp->data.u.sint = px->beconn; |
Willy Tarreau | a36af91 | 2009-10-10 12:02:45 +0200 | [diff] [blame] | 2904 | return 1; |
| 2905 | } |
| 2906 | |
Patrick Hemmer | 4cdf3ab | 2018-06-14 17:10:27 -0400 | [diff] [blame] | 2907 | /* set temp integer to the number of available connections across available |
| 2908 | * servers on the backend. |
| 2909 | * Accepts exactly 1 argument. Argument is a backend, other types will lead to |
| 2910 | * undefined behaviour. |
| 2911 | */ |
| 2912 | static int |
| 2913 | smp_fetch_be_conn_free(const struct arg *args, struct sample *smp, const char *kw, void *private) |
| 2914 | { |
| 2915 | struct server *iterator; |
Christopher Faulet | 37a9e21 | 2021-10-12 18:48:05 +0200 | [diff] [blame] | 2916 | struct proxy *px = args->data.prx; |
Patrick Hemmer | 4cdf3ab | 2018-06-14 17:10:27 -0400 | [diff] [blame] | 2917 | unsigned int maxconn; |
| 2918 | |
Christopher Faulet | 37a9e21 | 2021-10-12 18:48:05 +0200 | [diff] [blame] | 2919 | if (px == NULL) |
| 2920 | return 0; |
| 2921 | if (px->cap & PR_CAP_DEF) |
| 2922 | px = smp->px; |
| 2923 | |
Patrick Hemmer | 4cdf3ab | 2018-06-14 17:10:27 -0400 | [diff] [blame] | 2924 | smp->flags = SMP_F_VOL_TEST; |
| 2925 | smp->data.type = SMP_T_SINT; |
| 2926 | smp->data.u.sint = 0; |
| 2927 | |
Christopher Faulet | 37a9e21 | 2021-10-12 18:48:05 +0200 | [diff] [blame] | 2928 | for (iterator = px->srv; iterator; iterator = iterator->next) { |
Patrick Hemmer | 4cdf3ab | 2018-06-14 17:10:27 -0400 | [diff] [blame] | 2929 | if (iterator->cur_state == SRV_ST_STOPPED) |
| 2930 | continue; |
| 2931 | |
| 2932 | px = iterator->proxy; |
| 2933 | if (!srv_currently_usable(iterator) || |
| 2934 | ((iterator->flags & SRV_F_BACKUP) && |
| 2935 | (px->srv_act || (iterator != px->lbprm.fbck && !(px->options & PR_O_USE_ALL_BK))))) |
| 2936 | continue; |
| 2937 | |
| 2938 | if (iterator->maxconn == 0) { |
| 2939 | /* one active server is unlimited, return -1 */ |
| 2940 | smp->data.u.sint = -1; |
| 2941 | return 1; |
| 2942 | } |
| 2943 | |
| 2944 | maxconn = srv_dynamic_maxconn(iterator); |
| 2945 | if (maxconn > iterator->cur_sess) |
| 2946 | smp->data.u.sint += maxconn - iterator->cur_sess; |
| 2947 | } |
| 2948 | |
| 2949 | return 1; |
| 2950 | } |
| 2951 | |
Willy Tarreau | 34db108 | 2012-04-19 17:16:54 +0200 | [diff] [blame] | 2952 | /* set temp integer to the total number of queued connections on the backend. |
Willy Tarreau | 0146c2e | 2012-04-20 11:37:56 +0200 | [diff] [blame] | 2953 | * Accepts exactly 1 argument. Argument is a backend, other types will lead to |
Willy Tarreau | 34db108 | 2012-04-19 17:16:54 +0200 | [diff] [blame] | 2954 | * undefined behaviour. |
| 2955 | */ |
Willy Tarreau | a36af91 | 2009-10-10 12:02:45 +0200 | [diff] [blame] | 2956 | static int |
Thierry FOURNIER | 0786d05 | 2015-05-11 15:42:45 +0200 | [diff] [blame] | 2957 | smp_fetch_queue_size(const struct arg *args, struct sample *smp, const char *kw, void *private) |
Willy Tarreau | a36af91 | 2009-10-10 12:02:45 +0200 | [diff] [blame] | 2958 | { |
Christopher Faulet | 37a9e21 | 2021-10-12 18:48:05 +0200 | [diff] [blame] | 2959 | struct proxy *px = args->data.prx; |
| 2960 | |
| 2961 | if (px == NULL) |
| 2962 | return 0; |
| 2963 | if (px->cap & PR_CAP_DEF) |
| 2964 | px = smp->px; |
| 2965 | |
Willy Tarreau | 3740635 | 2012-04-23 16:16:37 +0200 | [diff] [blame] | 2966 | smp->flags = SMP_F_VOL_TEST; |
Thierry FOURNIER | 8c542ca | 2015-08-19 09:00:18 +0200 | [diff] [blame] | 2967 | smp->data.type = SMP_T_SINT; |
Christopher Faulet | 37a9e21 | 2021-10-12 18:48:05 +0200 | [diff] [blame] | 2968 | smp->data.u.sint = px->totpend; |
Willy Tarreau | a36af91 | 2009-10-10 12:02:45 +0200 | [diff] [blame] | 2969 | return 1; |
| 2970 | } |
| 2971 | |
Willy Tarreau | a5e3756 | 2011-12-16 17:06:15 +0100 | [diff] [blame] | 2972 | /* set temp integer to the total number of queued connections on the backend divided |
Willy Tarreau | a36af91 | 2009-10-10 12:02:45 +0200 | [diff] [blame] | 2973 | * by the number of running servers and rounded up. If there is no running |
| 2974 | * server, we return twice the total, just as if we had half a running server. |
| 2975 | * This is more or less correct anyway, since we expect the last server to come |
| 2976 | * back soon. |
Willy Tarreau | 0146c2e | 2012-04-20 11:37:56 +0200 | [diff] [blame] | 2977 | * Accepts exactly 1 argument. Argument is a backend, other types will lead to |
Willy Tarreau | 34db108 | 2012-04-19 17:16:54 +0200 | [diff] [blame] | 2978 | * undefined behaviour. |
Willy Tarreau | a36af91 | 2009-10-10 12:02:45 +0200 | [diff] [blame] | 2979 | */ |
| 2980 | static int |
Thierry FOURNIER | 0786d05 | 2015-05-11 15:42:45 +0200 | [diff] [blame] | 2981 | smp_fetch_avg_queue_size(const struct arg *args, struct sample *smp, const char *kw, void *private) |
Willy Tarreau | a36af91 | 2009-10-10 12:02:45 +0200 | [diff] [blame] | 2982 | { |
Christopher Faulet | 37a9e21 | 2021-10-12 18:48:05 +0200 | [diff] [blame] | 2983 | struct proxy *px = args->data.prx; |
Willy Tarreau | a36af91 | 2009-10-10 12:02:45 +0200 | [diff] [blame] | 2984 | int nbsrv; |
Christopher Faulet | 37a9e21 | 2021-10-12 18:48:05 +0200 | [diff] [blame] | 2985 | |
| 2986 | if (px == NULL) |
| 2987 | return 0; |
| 2988 | if (px->cap & PR_CAP_DEF) |
| 2989 | px = smp->px; |
Willy Tarreau | a36af91 | 2009-10-10 12:02:45 +0200 | [diff] [blame] | 2990 | |
Willy Tarreau | 3740635 | 2012-04-23 16:16:37 +0200 | [diff] [blame] | 2991 | smp->flags = SMP_F_VOL_TEST; |
Thierry FOURNIER | 8c542ca | 2015-08-19 09:00:18 +0200 | [diff] [blame] | 2992 | smp->data.type = SMP_T_SINT; |
Willy Tarreau | a36af91 | 2009-10-10 12:02:45 +0200 | [diff] [blame] | 2993 | |
Nenad Merdanovic | 2754fbc | 2017-03-12 21:56:56 +0100 | [diff] [blame] | 2994 | nbsrv = be_usable_srv(px); |
Willy Tarreau | a36af91 | 2009-10-10 12:02:45 +0200 | [diff] [blame] | 2995 | |
| 2996 | if (nbsrv > 0) |
Thierry FOURNIER | 136f9d3 | 2015-08-19 09:07:19 +0200 | [diff] [blame] | 2997 | smp->data.u.sint = (px->totpend + nbsrv - 1) / nbsrv; |
Willy Tarreau | a36af91 | 2009-10-10 12:02:45 +0200 | [diff] [blame] | 2998 | else |
Thierry FOURNIER | 136f9d3 | 2015-08-19 09:07:19 +0200 | [diff] [blame] | 2999 | smp->data.u.sint = px->totpend * 2; |
Willy Tarreau | a36af91 | 2009-10-10 12:02:45 +0200 | [diff] [blame] | 3000 | |
| 3001 | return 1; |
| 3002 | } |
Willy Tarreau | a9d3c1e | 2007-11-30 20:48:53 +0100 | [diff] [blame] | 3003 | |
Willy Tarreau | 34db108 | 2012-04-19 17:16:54 +0200 | [diff] [blame] | 3004 | /* set temp integer to the number of concurrent connections on the server in the backend. |
| 3005 | * Accepts exactly 1 argument. Argument is a server, other types will lead to |
| 3006 | * undefined behaviour. |
| 3007 | */ |
Hervé COMMOWICK | daa824e | 2011-08-05 12:09:44 +0200 | [diff] [blame] | 3008 | static int |
Thierry FOURNIER | 0786d05 | 2015-05-11 15:42:45 +0200 | [diff] [blame] | 3009 | smp_fetch_srv_conn(const struct arg *args, struct sample *smp, const char *kw, void *private) |
Hervé COMMOWICK | daa824e | 2011-08-05 12:09:44 +0200 | [diff] [blame] | 3010 | { |
Willy Tarreau | f853c46 | 2012-04-23 18:53:56 +0200 | [diff] [blame] | 3011 | smp->flags = SMP_F_VOL_TEST; |
Thierry FOURNIER | 8c542ca | 2015-08-19 09:00:18 +0200 | [diff] [blame] | 3012 | smp->data.type = SMP_T_SINT; |
Thierry FOURNIER | 136f9d3 | 2015-08-19 09:07:19 +0200 | [diff] [blame] | 3013 | smp->data.u.sint = args->data.srv->cur_sess; |
Hervé COMMOWICK | daa824e | 2011-08-05 12:09:44 +0200 | [diff] [blame] | 3014 | return 1; |
| 3015 | } |
| 3016 | |
Patrick Hemmer | 155e93e | 2018-06-14 18:01:35 -0400 | [diff] [blame] | 3017 | /* set temp integer to the number of available connections on the server in the backend. |
| 3018 | * Accepts exactly 1 argument. Argument is a server, other types will lead to |
| 3019 | * undefined behaviour. |
| 3020 | */ |
| 3021 | static int |
| 3022 | smp_fetch_srv_conn_free(const struct arg *args, struct sample *smp, const char *kw, void *private) |
| 3023 | { |
| 3024 | unsigned int maxconn; |
| 3025 | |
| 3026 | smp->flags = SMP_F_VOL_TEST; |
| 3027 | smp->data.type = SMP_T_SINT; |
| 3028 | |
| 3029 | if (args->data.srv->maxconn == 0) { |
| 3030 | /* one active server is unlimited, return -1 */ |
| 3031 | smp->data.u.sint = -1; |
| 3032 | return 1; |
| 3033 | } |
| 3034 | |
| 3035 | maxconn = srv_dynamic_maxconn(args->data.srv); |
| 3036 | if (maxconn > args->data.srv->cur_sess) |
| 3037 | smp->data.u.sint = maxconn - args->data.srv->cur_sess; |
| 3038 | else |
| 3039 | smp->data.u.sint = 0; |
| 3040 | |
| 3041 | return 1; |
| 3042 | } |
| 3043 | |
Willy Tarreau | ff2b7af | 2017-10-13 11:46:26 +0200 | [diff] [blame] | 3044 | /* set temp integer to the number of connections pending in the server's queue. |
| 3045 | * Accepts exactly 1 argument. Argument is a server, other types will lead to |
| 3046 | * undefined behaviour. |
| 3047 | */ |
| 3048 | static int |
| 3049 | smp_fetch_srv_queue(const struct arg *args, struct sample *smp, const char *kw, void *private) |
| 3050 | { |
| 3051 | smp->flags = SMP_F_VOL_TEST; |
| 3052 | smp->data.type = SMP_T_SINT; |
Willy Tarreau | a057045 | 2021-06-18 09:30:30 +0200 | [diff] [blame] | 3053 | smp->data.u.sint = args->data.srv->queue.length; |
Willy Tarreau | ff2b7af | 2017-10-13 11:46:26 +0200 | [diff] [blame] | 3054 | return 1; |
| 3055 | } |
| 3056 | |
Tait Clarridge | 7896d52 | 2012-12-05 21:39:31 -0500 | [diff] [blame] | 3057 | /* set temp integer to the number of enabled servers on the proxy. |
| 3058 | * Accepts exactly 1 argument. Argument is a server, other types will lead to |
| 3059 | * undefined behaviour. |
| 3060 | */ |
| 3061 | static int |
Thierry FOURNIER | 0786d05 | 2015-05-11 15:42:45 +0200 | [diff] [blame] | 3062 | smp_fetch_srv_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private) |
Tait Clarridge | 7896d52 | 2012-12-05 21:39:31 -0500 | [diff] [blame] | 3063 | { |
| 3064 | smp->flags = SMP_F_VOL_TEST; |
Thierry FOURNIER | 8c542ca | 2015-08-19 09:00:18 +0200 | [diff] [blame] | 3065 | smp->data.type = SMP_T_SINT; |
Thierry FOURNIER | 136f9d3 | 2015-08-19 09:07:19 +0200 | [diff] [blame] | 3066 | smp->data.u.sint = read_freq_ctr(&args->data.srv->sess_per_sec); |
Tait Clarridge | 7896d52 | 2012-12-05 21:39:31 -0500 | [diff] [blame] | 3067 | return 1; |
| 3068 | } |
| 3069 | |
Christopher Faulet | 1bea865 | 2020-07-10 16:03:45 +0200 | [diff] [blame] | 3070 | /* set temp integer to the server weight. |
| 3071 | * Accepts exactly 1 argument. Argument is a server, other types will lead to |
| 3072 | * undefined behaviour. |
| 3073 | */ |
| 3074 | static int |
| 3075 | smp_fetch_srv_weight(const struct arg *args, struct sample *smp, const char *kw, void *private) |
| 3076 | { |
| 3077 | struct server *srv = args->data.srv; |
| 3078 | struct proxy *px = srv->proxy; |
| 3079 | |
| 3080 | smp->flags = SMP_F_VOL_TEST; |
| 3081 | smp->data.type = SMP_T_SINT; |
| 3082 | smp->data.u.sint = (srv->cur_eweight * px->lbprm.wmult + px->lbprm.wdiv - 1) / px->lbprm.wdiv; |
| 3083 | return 1; |
| 3084 | } |
| 3085 | |
| 3086 | /* set temp integer to the server initial weight. |
| 3087 | * Accepts exactly 1 argument. Argument is a server, other types will lead to |
| 3088 | * undefined behaviour. |
| 3089 | */ |
| 3090 | static int |
| 3091 | smp_fetch_srv_iweight(const struct arg *args, struct sample *smp, const char *kw, void *private) |
| 3092 | { |
| 3093 | smp->flags = SMP_F_VOL_TEST; |
| 3094 | smp->data.type = SMP_T_SINT; |
| 3095 | smp->data.u.sint = args->data.srv->iweight; |
| 3096 | return 1; |
| 3097 | } |
| 3098 | |
| 3099 | /* set temp integer to the server user-specified weight. |
| 3100 | * Accepts exactly 1 argument. Argument is a server, other types will lead to |
| 3101 | * undefined behaviour. |
| 3102 | */ |
| 3103 | static int |
| 3104 | smp_fetch_srv_uweight(const struct arg *args, struct sample *smp, const char *kw, void *private) |
| 3105 | { |
| 3106 | smp->flags = SMP_F_VOL_TEST; |
| 3107 | smp->data.type = SMP_T_SINT; |
| 3108 | smp->data.u.sint = args->data.srv->uweight; |
| 3109 | return 1; |
| 3110 | } |
| 3111 | |
Amaury Denoyelle | d91d779 | 2020-12-10 13:43:56 +0100 | [diff] [blame] | 3112 | static int |
| 3113 | smp_fetch_be_server_timeout(const struct arg *args, struct sample *smp, const char *km, void *private) |
| 3114 | { |
| 3115 | struct proxy *px = NULL; |
| 3116 | |
| 3117 | if (smp->strm) |
| 3118 | px = smp->strm->be; |
| 3119 | else if (obj_type(smp->sess->origin) == OBJ_TYPE_CHECK) |
| 3120 | px = __objt_check(smp->sess->origin)->proxy; |
| 3121 | if (!px) |
| 3122 | return 0; |
| 3123 | |
| 3124 | smp->flags = SMP_F_VOL_TXN; |
| 3125 | smp->data.type = SMP_T_SINT; |
| 3126 | smp->data.u.sint = TICKS_TO_MS(px->timeout.server); |
| 3127 | return 1; |
| 3128 | } |
| 3129 | |
| 3130 | static int |
| 3131 | smp_fetch_be_tunnel_timeout(const struct arg *args, struct sample *smp, const char *km, void *private) |
| 3132 | { |
| 3133 | struct proxy *px = NULL; |
| 3134 | |
| 3135 | if (smp->strm) |
| 3136 | px = smp->strm->be; |
| 3137 | else if (obj_type(smp->sess->origin) == OBJ_TYPE_CHECK) |
| 3138 | px = __objt_check(smp->sess->origin)->proxy; |
| 3139 | if (!px) |
| 3140 | return 0; |
| 3141 | |
| 3142 | smp->flags = SMP_F_VOL_TXN; |
| 3143 | smp->data.type = SMP_T_SINT; |
| 3144 | smp->data.u.sint = TICKS_TO_MS(px->timeout.tunnel); |
| 3145 | return 1; |
| 3146 | } |
| 3147 | |
Nenad Merdanovic | b7e7c47 | 2017-03-12 21:56:55 +0100 | [diff] [blame] | 3148 | static int sample_conv_nbsrv(const struct arg *args, struct sample *smp, void *private) |
| 3149 | { |
| 3150 | |
| 3151 | struct proxy *px; |
| 3152 | |
| 3153 | if (!smp_make_safe(smp)) |
| 3154 | return 0; |
| 3155 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 3156 | px = proxy_find_by_name(smp->data.u.str.area, PR_CAP_BE, 0); |
Nenad Merdanovic | b7e7c47 | 2017-03-12 21:56:55 +0100 | [diff] [blame] | 3157 | if (!px) |
| 3158 | return 0; |
| 3159 | |
| 3160 | smp->data.type = SMP_T_SINT; |
| 3161 | smp->data.u.sint = be_usable_srv(px); |
| 3162 | |
| 3163 | return 1; |
| 3164 | } |
| 3165 | |
Nenad Merdanovic | 177adc9 | 2019-08-27 01:58:13 +0200 | [diff] [blame] | 3166 | static int |
| 3167 | sample_conv_srv_queue(const struct arg *args, struct sample *smp, void *private) |
| 3168 | { |
| 3169 | struct proxy *px; |
| 3170 | struct server *srv; |
| 3171 | char *bksep; |
| 3172 | |
| 3173 | if (!smp_make_safe(smp)) |
| 3174 | return 0; |
| 3175 | |
| 3176 | bksep = strchr(smp->data.u.str.area, '/'); |
| 3177 | |
| 3178 | if (bksep) { |
| 3179 | *bksep = '\0'; |
| 3180 | px = proxy_find_by_name(smp->data.u.str.area, PR_CAP_BE, 0); |
| 3181 | if (!px) |
| 3182 | return 0; |
| 3183 | smp->data.u.str.area = bksep + 1; |
| 3184 | } else { |
| 3185 | if (!(smp->px->cap & PR_CAP_BE)) |
| 3186 | return 0; |
| 3187 | px = smp->px; |
| 3188 | } |
| 3189 | |
| 3190 | srv = server_find_by_name(px, smp->data.u.str.area); |
| 3191 | if (!srv) |
| 3192 | return 0; |
| 3193 | |
| 3194 | smp->data.type = SMP_T_SINT; |
Willy Tarreau | a057045 | 2021-06-18 09:30:30 +0200 | [diff] [blame] | 3195 | smp->data.u.sint = srv->queue.length; |
Nenad Merdanovic | 177adc9 | 2019-08-27 01:58:13 +0200 | [diff] [blame] | 3196 | return 1; |
| 3197 | } |
Willy Tarreau | 1a7eca1 | 2013-01-07 22:38:03 +0100 | [diff] [blame] | 3198 | |
| 3199 | /* Note: must not be declared <const> as its list will be overwritten. |
| 3200 | * Please take care of keeping this list alphabetically sorted. |
| 3201 | */ |
Willy Tarreau | dc13c11 | 2013-06-21 23:16:39 +0200 | [diff] [blame] | 3202 | static struct sample_fetch_kw_list smp_kws = {ILH, { |
Amaury Denoyelle | d91d779 | 2020-12-10 13:43:56 +0100 | [diff] [blame] | 3203 | { "avg_queue", smp_fetch_avg_queue_size, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, }, |
| 3204 | { "be_conn", smp_fetch_be_conn, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, }, |
| 3205 | { "be_conn_free", smp_fetch_be_conn_free, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, }, |
| 3206 | { "be_id", smp_fetch_be_id, 0, NULL, SMP_T_SINT, SMP_USE_BKEND, }, |
| 3207 | { "be_name", smp_fetch_be_name, 0, NULL, SMP_T_STR, SMP_USE_BKEND, }, |
| 3208 | { "be_server_timeout", smp_fetch_be_server_timeout, 0, NULL, SMP_T_SINT, SMP_USE_BKEND, }, |
| 3209 | { "be_sess_rate", smp_fetch_be_sess_rate, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, }, |
| 3210 | { "be_tunnel_timeout", smp_fetch_be_tunnel_timeout, 0, NULL, SMP_T_SINT, SMP_USE_BKEND, }, |
| 3211 | { "connslots", smp_fetch_connslots, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, }, |
| 3212 | { "nbsrv", smp_fetch_nbsrv, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, }, |
| 3213 | { "queue", smp_fetch_queue_size, ARG1(1,BE), NULL, SMP_T_SINT, SMP_USE_INTRN, }, |
| 3214 | { "srv_conn", smp_fetch_srv_conn, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, }, |
| 3215 | { "srv_conn_free", smp_fetch_srv_conn_free, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, }, |
| 3216 | { "srv_id", smp_fetch_srv_id, 0, NULL, SMP_T_SINT, SMP_USE_SERVR, }, |
| 3217 | { "srv_is_up", smp_fetch_srv_is_up, ARG1(1,SRV), NULL, SMP_T_BOOL, SMP_USE_INTRN, }, |
| 3218 | { "srv_name", smp_fetch_srv_name, 0, NULL, SMP_T_STR, SMP_USE_SERVR, }, |
| 3219 | { "srv_queue", smp_fetch_srv_queue, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, }, |
| 3220 | { "srv_sess_rate", smp_fetch_srv_sess_rate, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, }, |
| 3221 | { "srv_weight", smp_fetch_srv_weight, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, }, |
| 3222 | { "srv_iweight", smp_fetch_srv_iweight, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, }, |
| 3223 | { "srv_uweight", smp_fetch_srv_uweight, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, }, |
Willy Tarreau | 1a7eca1 | 2013-01-07 22:38:03 +0100 | [diff] [blame] | 3224 | { /* END */ }, |
| 3225 | }}; |
| 3226 | |
Willy Tarreau | 0108d90 | 2018-11-25 19:14:37 +0100 | [diff] [blame] | 3227 | INITCALL1(STG_REGISTER, sample_register_fetches, &smp_kws); |
| 3228 | |
Nenad Merdanovic | b7e7c47 | 2017-03-12 21:56:55 +0100 | [diff] [blame] | 3229 | /* Note: must not be declared <const> as its list will be overwritten */ |
| 3230 | static struct sample_conv_kw_list sample_conv_kws = {ILH, { |
Nenad Merdanovic | 177adc9 | 2019-08-27 01:58:13 +0200 | [diff] [blame] | 3231 | { "nbsrv", sample_conv_nbsrv, 0, NULL, SMP_T_STR, SMP_T_SINT }, |
| 3232 | { "srv_queue", sample_conv_srv_queue, 0, NULL, SMP_T_STR, SMP_T_SINT }, |
Nenad Merdanovic | b7e7c47 | 2017-03-12 21:56:55 +0100 | [diff] [blame] | 3233 | { /* END */ }, |
| 3234 | }}; |
| 3235 | |
Willy Tarreau | 0108d90 | 2018-11-25 19:14:37 +0100 | [diff] [blame] | 3236 | INITCALL1(STG_REGISTER, sample_register_convs, &sample_conv_kws); |
Willy Tarreau | 1a7eca1 | 2013-01-07 22:38:03 +0100 | [diff] [blame] | 3237 | |
Willy Tarreau | 61612d4 | 2012-04-19 18:42:05 +0200 | [diff] [blame] | 3238 | /* Note: must not be declared <const> as its list will be overwritten. |
| 3239 | * Please take care of keeping this list alphabetically sorted. |
| 3240 | */ |
Willy Tarreau | dc13c11 | 2013-06-21 23:16:39 +0200 | [diff] [blame] | 3241 | static struct acl_kw_list acl_kws = {ILH, { |
Willy Tarreau | 1a7eca1 | 2013-01-07 22:38:03 +0100 | [diff] [blame] | 3242 | { /* END */ }, |
Willy Tarreau | a9d3c1e | 2007-11-30 20:48:53 +0100 | [diff] [blame] | 3243 | }}; |
| 3244 | |
Willy Tarreau | 0108d90 | 2018-11-25 19:14:37 +0100 | [diff] [blame] | 3245 | INITCALL1(STG_REGISTER, acl_register_keywords, &acl_kws); |
Willy Tarreau | a9d3c1e | 2007-11-30 20:48:53 +0100 | [diff] [blame] | 3246 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 3247 | /* |
| 3248 | * Local variables: |
| 3249 | * c-indent-level: 8 |
| 3250 | * c-basic-offset: 8 |
| 3251 | * End: |
| 3252 | */ |