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git01.mediatek.com / haproxy / 0c6de00d7c842a682bba7586ef34fb10f69ec63c / . / src / proxy.c
blob: 78babd5bb707a077722fefecdbc099587cbc180f [file] [log] [blame]
/*
* Proxy variables and functions.
*
* Copyright 2000-2009 Willy Tarreau <w@1wt.eu>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <common/defaults.h>
#include <common/cfgparse.h>
#include <common/compat.h>
#include <common/config.h>
#include <common/errors.h>
#include <common/initcall.h>
#include <common/memory.h>
#include <common/time.h>
#include <eb32tree.h>
#include <ebistree.h>
#include <types/capture.h>
#include <types/cli.h>
#include <types/global.h>
#include <types/obj_type.h>
#include <types/peers.h>
#include <types/stats.h>
#include <proto/applet.h>
#include <proto/cli.h>
#include <proto/backend.h>
#include <proto/fd.h>
#include <proto/filters.h>
#include <proto/hdr_idx.h>
#include <proto/listener.h>
#include <proto/log.h>
#include <proto/proto_tcp.h>
#include <proto/proto_http.h>
#include <proto/proxy.h>
#include <proto/server.h>
#include <proto/signal.h>
#include <proto/stream.h>
#include <proto/stream_interface.h>
#include <proto/task.h>
int listeners; /* # of proxy listeners, set by cfgparse */
struct proxy *proxies_list = NULL; /* list of all existing proxies */
struct eb_root used_proxy_id = EB_ROOT; /* list of proxy IDs in use */
struct eb_root proxy_by_name = EB_ROOT; /* tree of proxies sorted by name */
unsigned int error_snapshot_id = 0; /* global ID assigned to each error then incremented */
/* proxy->options */
const struct cfg_opt cfg_opts[] =
{
{ "abortonclose", PR_O_ABRT_CLOSE, PR_CAP_BE, 0, 0 },
{ "allbackups", PR_O_USE_ALL_BK, PR_CAP_BE, 0, 0 },
{ "checkcache", PR_O_CHK_CACHE, PR_CAP_BE, 0, PR_MODE_HTTP },
{ "clitcpka", PR_O_TCP_CLI_KA, PR_CAP_FE, 0, 0 },
{ "contstats", PR_O_CONTSTATS, PR_CAP_FE, 0, 0 },
{ "dontlognull", PR_O_NULLNOLOG, PR_CAP_FE, 0, 0 },
{ "http_proxy", PR_O_HTTP_PROXY, PR_CAP_FE | PR_CAP_BE, 0, PR_MODE_HTTP },
{ "http-buffer-request", PR_O_WREQ_BODY, PR_CAP_FE | PR_CAP_BE, 0, PR_MODE_HTTP },
{ "http-ignore-probes", PR_O_IGNORE_PRB, PR_CAP_FE, 0, PR_MODE_HTTP },
{ "prefer-last-server", PR_O_PREF_LAST, PR_CAP_BE, 0, PR_MODE_HTTP },
{ "logasap", PR_O_LOGASAP, PR_CAP_FE, 0, 0 },
{ "nolinger", PR_O_TCP_NOLING, PR_CAP_FE | PR_CAP_BE, 0, 0 },
{ "persist", PR_O_PERSIST, PR_CAP_BE, 0, 0 },
{ "srvtcpka", PR_O_TCP_SRV_KA, PR_CAP_BE, 0, 0 },
#ifdef USE_TPROXY
{ "transparent", PR_O_TRANSP, PR_CAP_BE, 0, 0 },
#else
{ "transparent", 0, 0, 0, 0 },
#endif
{ NULL, 0, 0, 0, 0 }
};
/* proxy->options2 */
const struct cfg_opt cfg_opts2[] =
{
#ifdef USE_LINUX_SPLICE
{ "splice-request", PR_O2_SPLIC_REQ, PR_CAP_FE|PR_CAP_BE, 0, 0 },
{ "splice-response", PR_O2_SPLIC_RTR, PR_CAP_FE|PR_CAP_BE, 0, 0 },
{ "splice-auto", PR_O2_SPLIC_AUT, PR_CAP_FE|PR_CAP_BE, 0, 0 },
#else
{ "splice-request", 0, 0, 0, 0 },
{ "splice-response", 0, 0, 0, 0 },
{ "splice-auto", 0, 0, 0, 0 },
#endif
{ "accept-invalid-http-request", PR_O2_REQBUG_OK, PR_CAP_FE, 0, PR_MODE_HTTP },
{ "accept-invalid-http-response", PR_O2_RSPBUG_OK, PR_CAP_BE, 0, PR_MODE_HTTP },
{ "dontlog-normal", PR_O2_NOLOGNORM, PR_CAP_FE, 0, 0 },
{ "log-separate-errors", PR_O2_LOGERRORS, PR_CAP_FE, 0, 0 },
{ "log-health-checks", PR_O2_LOGHCHKS, PR_CAP_BE, 0, 0 },
{ "socket-stats", PR_O2_SOCKSTAT, PR_CAP_FE, 0, 0 },
{ "tcp-smart-accept", PR_O2_SMARTACC, PR_CAP_FE, 0, 0 },
{ "tcp-smart-connect", PR_O2_SMARTCON, PR_CAP_BE, 0, 0 },
{ "independant-streams", PR_O2_INDEPSTR, PR_CAP_FE|PR_CAP_BE, 0, 0 },
{ "independent-streams", PR_O2_INDEPSTR, PR_CAP_FE|PR_CAP_BE, 0, 0 },
{ "http-use-proxy-header", PR_O2_USE_PXHDR, PR_CAP_FE, 0, PR_MODE_HTTP },
{ "http-pretend-keepalive", PR_O2_FAKE_KA, PR_CAP_BE, 0, PR_MODE_HTTP },
{ "http-no-delay", PR_O2_NODELAY, PR_CAP_FE|PR_CAP_BE, 0, PR_MODE_HTTP },
{ "http-use-htx", PR_O2_USE_HTX, PR_CAP_FE|PR_CAP_BE, 0, 0 },
{ NULL, 0, 0, 0 }
};
/*
* This function returns a string containing a name describing capabilities to
* report comprehensible error messages. Specifically, it will return the words
* "frontend", "backend" when appropriate, or "proxy" for all other
* cases including the proxies declared in "listen" mode.
*/
const char *proxy_cap_str(int cap)
{
if ((cap & PR_CAP_LISTEN) != PR_CAP_LISTEN) {
if (cap & PR_CAP_FE)
return "frontend";
else if (cap & PR_CAP_BE)
return "backend";
}
return "proxy";
}
/*
* This function returns a string containing the mode of the proxy in a format
* suitable for error messages.
*/
const char *proxy_mode_str(int mode) {
if (mode == PR_MODE_TCP)
return "tcp";
else if (mode == PR_MODE_HTTP)
return "http";
else if (mode == PR_MODE_HEALTH)
return "health";
else if (mode == PR_MODE_CLI)
return "cli";
else
return "unknown";
}
/*
* This function scans the list of backends and servers to retrieve the first
* backend and the first server with the given names, and sets them in both
* parameters. It returns zero if either is not found, or non-zero and sets
* the ones it did not found to NULL. If a NULL pointer is passed for the
* backend, only the pointer to the server will be updated.
*/
int get_backend_server(const char *bk_name, const char *sv_name,
struct proxy **bk, struct server **sv)
{
struct proxy *p;
struct server *s;
int sid;
*sv = NULL;
sid = -1;
if (*sv_name == '#')
sid = atoi(sv_name + 1);
p = proxy_be_by_name(bk_name);
if (bk)
*bk = p;
if (!p)
return 0;
for (s = p->srv; s; s = s->next)
if ((sid >= 0 && s->puid == sid) ||
(sid < 0 && strcmp(s->id, sv_name) == 0))
break;
*sv = s;
if (!s)
return 0;
return 1;
}
/* This function parses a "timeout" statement in a proxy section. It returns
* -1 if there is any error, 1 for a warning, otherwise zero. If it does not
* return zero, it will write an error or warning message into a preallocated
* buffer returned at <err>. The trailing is not be written. The function must
* be called with <args> pointing to the first command line word, with <proxy>
* pointing to the proxy being parsed, and <defpx> to the default proxy or NULL.
* As a special case for compatibility with older configs, it also accepts
* "{cli|srv|con}timeout" in args[0].
*/
static int proxy_parse_timeout(char **args, int section, struct proxy *proxy,
struct proxy *defpx, const char *file, int line,
char **err)
{
unsigned timeout;
int retval, cap;
const char *res, *name;
int *tv = NULL;
int *td = NULL;
int warn = 0;
retval = 0;
/* simply skip "timeout" but remain compatible with old form */
if (strcmp(args[0], "timeout") == 0)
args++;
name = args[0];
if (!strcmp(args[0], "client") || (!strcmp(args[0], "clitimeout") && (warn = WARN_CLITO_DEPRECATED))) {
name = "client";
tv = &proxy->timeout.client;
td = &defpx->timeout.client;
cap = PR_CAP_FE;
} else if (!strcmp(args[0], "tarpit")) {
tv = &proxy->timeout.tarpit;
td = &defpx->timeout.tarpit;
cap = PR_CAP_FE | PR_CAP_BE;
} else if (!strcmp(args[0], "http-keep-alive")) {
tv = &proxy->timeout.httpka;
td = &defpx->timeout.httpka;
cap = PR_CAP_FE | PR_CAP_BE;
} else if (!strcmp(args[0], "http-request")) {
tv = &proxy->timeout.httpreq;
td = &defpx->timeout.httpreq;
cap = PR_CAP_FE | PR_CAP_BE;
} else if (!strcmp(args[0], "server") || (!strcmp(args[0], "srvtimeout") && (warn = WARN_SRVTO_DEPRECATED))) {
name = "server";
tv = &proxy->timeout.server;
td = &defpx->timeout.server;
cap = PR_CAP_BE;
} else if (!strcmp(args[0], "connect") || (!strcmp(args[0], "contimeout") && (warn = WARN_CONTO_DEPRECATED))) {
name = "connect";
tv = &proxy->timeout.connect;
td = &defpx->timeout.connect;
cap = PR_CAP_BE;
} else if (!strcmp(args[0], "check")) {
tv = &proxy->timeout.check;
td = &defpx->timeout.check;
cap = PR_CAP_BE;
} else if (!strcmp(args[0], "queue")) {
tv = &proxy->timeout.queue;
td = &defpx->timeout.queue;
cap = PR_CAP_BE;
} else if (!strcmp(args[0], "tunnel")) {
tv = &proxy->timeout.tunnel;
td = &defpx->timeout.tunnel;
cap = PR_CAP_BE;
} else if (!strcmp(args[0], "client-fin")) {
tv = &proxy->timeout.clientfin;
td = &defpx->timeout.clientfin;
cap = PR_CAP_FE;
} else if (!strcmp(args[0], "server-fin")) {
tv = &proxy->timeout.serverfin;
td = &defpx->timeout.serverfin;
cap = PR_CAP_BE;
} else {
memprintf(err,
"'timeout' supports 'client', 'server', 'connect', 'check', "
"'queue', 'http-keep-alive', 'http-request', 'tunnel', 'tarpit', "
"'client-fin' and 'server-fin' (got '%s')",
args[0]);
return -1;
}
if (*args[1] == 0) {
memprintf(err, "'timeout %s' expects an integer value (in milliseconds)", name);
return -1;
}
res = parse_time_err(args[1], &timeout, TIME_UNIT_MS);
if (res == PARSE_TIME_OVER) {
memprintf(err, "timer overflow in argument '%s' to 'timeout %s' (maximum value is 2147483647 ms or ~24.8 days)",
args[1], name);
return -1;
}
else if (res == PARSE_TIME_UNDER) {
memprintf(err, "timer underflow in argument '%s' to 'timeout %s' (minimum non-null value is 1 ms)",
args[1], name);
return -1;
}
else if (res) {
memprintf(err, "unexpected character '%c' in 'timeout %s'", *res, name);
return -1;
}
if (!(proxy->cap & cap)) {
memprintf(err, "'timeout %s' will be ignored because %s '%s' has no %s capability",
name, proxy_type_str(proxy), proxy->id,
(cap & PR_CAP_BE) ? "backend" : "frontend");
retval = 1;
}
else if (defpx && *tv != *td) {
memprintf(err, "overwriting 'timeout %s' which was already specified", name);
retval = 1;
}
else if (warn) {
if (!already_warned(warn)) {
memprintf(err, "the '%s' directive is now deprecated in favor of 'timeout %s', and will not be supported in future versions.",
args[0], name);
retval = 1;
}
}
if (*args[2] != 0) {
memprintf(err, "'timeout %s' : unexpected extra argument '%s' after value '%s'.", name, args[2], args[1]);
retval = -1;
}
*tv = MS_TO_TICKS(timeout);
return retval;
}
/* This function parses a "rate-limit" statement in a proxy section. It returns
* -1 if there is any error, 1 for a warning, otherwise zero. If it does not
* return zero, it will write an error or warning message into a preallocated
* buffer returned at <err>. The function must be called with <args> pointing
* to the first command line word, with <proxy> pointing to the proxy being
* parsed, and <defpx> to the default proxy or NULL.
*/
static int proxy_parse_rate_limit(char **args, int section, struct proxy *proxy,
struct proxy *defpx, const char *file, int line,
char **err)
{
int retval, cap;
char *res;
unsigned int *tv = NULL;
unsigned int *td = NULL;
unsigned int val;
retval = 0;
if (strcmp(args[1], "sessions") == 0) {
tv = &proxy->fe_sps_lim;
td = &defpx->fe_sps_lim;
cap = PR_CAP_FE;
}
else {
memprintf(err, "'%s' only supports 'sessions' (got '%s')", args[0], args[1]);
return -1;
}
if (*args[2] == 0) {
memprintf(err, "'%s %s' expects expects an integer value (in sessions/second)", args[0], args[1]);
return -1;
}
val = strtoul(args[2], &res, 0);
if (*res) {
memprintf(err, "'%s %s' : unexpected character '%c' in integer value '%s'", args[0], args[1], *res, args[2]);
return -1;
}
if (!(proxy->cap & cap)) {
memprintf(err, "%s %s will be ignored because %s '%s' has no %s capability",
args[0], args[1], proxy_type_str(proxy), proxy->id,
(cap & PR_CAP_BE) ? "backend" : "frontend");
retval = 1;
}
else if (defpx && *tv != *td) {
memprintf(err, "overwriting %s %s which was already specified", args[0], args[1]);
retval = 1;
}
*tv = val;
return retval;
}
/* This function parses a "max-keep-alive-queue" statement in a proxy section.
* It returns -1 if there is any error, 1 for a warning, otherwise zero. If it
* does not return zero, it will write an error or warning message into a
* preallocated buffer returned at <err>. The function must be called with
* <args> pointing to the first command line word, with <proxy> pointing to
* the proxy being parsed, and <defpx> to the default proxy or NULL.
*/
static int proxy_parse_max_ka_queue(char **args, int section, struct proxy *proxy,
struct proxy *defpx, const char *file, int line,
char **err)
{
int retval;
char *res;
unsigned int val;
retval = 0;
if (*args[1] == 0) {
memprintf(err, "'%s' expects expects an integer value (or -1 to disable)", args[0]);
return -1;
}
val = strtol(args[1], &res, 0);
if (*res) {
memprintf(err, "'%s' : unexpected character '%c' in integer value '%s'", args[0], *res, args[1]);
return -1;
}
if (!(proxy->cap & PR_CAP_BE)) {
memprintf(err, "%s will be ignored because %s '%s' has no backend capability",
args[0], proxy_type_str(proxy), proxy->id);
retval = 1;
}
/* we store <val+1> so that a user-facing value of -1 is stored as zero (default) */
proxy->max_ka_queue = val + 1;
return retval;
}
/* This function parses a "declare" statement in a proxy section. It returns -1
* if there is any error, 1 for warning, otherwise 0. If it does not return zero,
* it will write an error or warning message into a preallocated buffer returned
* at <err>. The function must be called with <args> pointing to the first command
* line word, with <proxy> pointing to the proxy being parsed, and <defpx> to the
* default proxy or NULL.
*/
static int proxy_parse_declare(char **args, int section, struct proxy *curpx,
struct proxy *defpx, const char *file, int line,
char **err)
{
/* Capture keyword wannot be declared in a default proxy. */
if (curpx == defpx) {
memprintf(err, "'%s' not available in default section", args[0]);
return -1;
}
/* Capture keywork is only available in frontend. */
if (!(curpx->cap & PR_CAP_FE)) {
memprintf(err, "'%s' only available in frontend or listen section", args[0]);
return -1;
}
/* Check mandatory second keyword. */
if (!args[1] || !*args[1]) {
memprintf(err, "'%s' needs a second keyword that specify the type of declaration ('capture')", args[0]);
return -1;
}
/* Actually, declare is only available for declaring capture
* slot, but in the future it can declare maps or variables.
* So, this section permits to check and switch according with
* the second keyword.
*/
if (strcmp(args[1], "capture") == 0) {
char *error = NULL;
long len;
struct cap_hdr *hdr;
/* Check the next keyword. */
if (!args[2] || !*args[2] ||
(strcmp(args[2], "response") != 0 &&
strcmp(args[2], "request") != 0)) {
memprintf(err, "'%s %s' requires a direction ('request' or 'response')", args[0], args[1]);
return -1;
}
/* Check the 'len' keyword. */
if (!args[3] || !*args[3] || strcmp(args[3], "len") != 0) {
memprintf(err, "'%s %s' requires a capture length ('len')", args[0], args[1]);
return -1;
}
/* Check the length value. */
if (!args[4] || !*args[4]) {
memprintf(err, "'%s %s': 'len' requires a numeric value that represents the "
"capture length",
args[0], args[1]);
return -1;
}
/* convert the length value. */
len = strtol(args[4], &error, 10);
if (*error != '\0') {
memprintf(err, "'%s %s': cannot parse the length '%s'.",
args[0], args[1], args[3]);
return -1;
}
/* check length. */
if (len <= 0) {
memprintf(err, "length must be > 0");
return -1;
}
/* register the capture. */
hdr = calloc(1, sizeof(*hdr));
hdr->name = NULL; /* not a header capture */
hdr->namelen = 0;
hdr->len = len;
hdr->pool = create_pool("caphdr", hdr->len + 1, MEM_F_SHARED);
if (strcmp(args[2], "request") == 0) {
hdr->next = curpx->req_cap;
hdr->index = curpx->nb_req_cap++;
curpx->req_cap = hdr;
}
if (strcmp(args[2], "response") == 0) {
hdr->next = curpx->rsp_cap;
hdr->index = curpx->nb_rsp_cap++;
curpx->rsp_cap = hdr;
}
return 0;
}
else {
memprintf(err, "unknown declaration type '%s' (supports 'capture')", args[1]);
return -1;
}
}
/* This function parses a "retry-on" statement */
static int
proxy_parse_retry_on(char **args, int section, struct proxy *curpx,
struct proxy *defpx, const char *file, int line,
char **err)
{
int i;
if (!(*args[1])) {
memprintf(err, "'%s' needs at least one keyword to specify when to retry", args[0]);
return -1;
}
if (!(curpx->cap & PR_CAP_BE)) {
memprintf(err, "'%s' only available in backend or listen section", args[0]);
return -1;
}
curpx->retry_type = 0;
for (i = 1; *(args[i]); i++) {
if (!strcmp(args[i], "conn-failure"))
curpx->retry_type |= PR_RE_CONN_FAILED;
else if (!strcmp(args[i], "empty-response"))
curpx->retry_type |= PR_RE_DISCONNECTED;
else if (!strcmp(args[i], "response-timeout"))
curpx->retry_type |= PR_RE_TIMEOUT;
else if (!strcmp(args[i], "404"))
curpx->retry_type |= PR_RE_404;
else if (!strcmp(args[i], "408"))
curpx->retry_type |= PR_RE_408;
else if (!strcmp(args[i], "425"))
curpx->retry_type |= PR_RE_425;
else if (!strcmp(args[i], "500"))
curpx->retry_type |= PR_RE_500;
else if (!strcmp(args[i], "501"))
curpx->retry_type |= PR_RE_501;
else if (!strcmp(args[i], "502"))
curpx->retry_type |= PR_RE_502;
else if (!strcmp(args[i], "503"))
curpx->retry_type |= PR_RE_503;
else if (!strcmp(args[i], "504"))
curpx->retry_type |= PR_RE_504;
else if (!strcmp(args[i], "0rtt-rejected"))
curpx->retry_type |= PR_RE_EARLY_ERROR;
else if (!strcmp(args[i], "junk-response"))
curpx->retry_type |= PR_RE_JUNK_REQUEST;
else if (!(strcmp(args[i], "all-retryable-errors")))
curpx->retry_type |= PR_RE_CONN_FAILED | PR_RE_DISCONNECTED |
PR_RE_TIMEOUT | PR_RE_500 | PR_RE_502 |
PR_RE_503 | PR_RE_504 | PR_RE_EARLY_ERROR |
PR_RE_JUNK_REQUEST;
else if (!strcmp(args[i], "none")) {
if (i != 1 || *args[i + 1]) {
memprintf(err, "'%s' 'none' keyworld only usable alone", args[0]);
return -1;
}
} else {
memprintf(err, "'%s': unknown keyword '%s'", args[0], args[i]);
return -1;
}
}
return 0;
}
/* This function inserts proxy <px> into the tree of known proxies. The proxy's
* name is used as the storing key so it must already have been initialized.
*/
void proxy_store_name(struct proxy *px)
{
px->conf.by_name.key = px->id;
ebis_insert(&proxy_by_name, &px->conf.by_name);
}
/* Returns a pointer to the first proxy matching capabilities <cap> and id
* <id>. NULL is returned if no match is found. If <table> is non-zero, it
* only considers proxies having a table.
*/
struct proxy *proxy_find_by_id(int id, int cap, int table)
{
struct eb32_node *n;
for (n = eb32_lookup(&used_proxy_id, id); n; n = eb32_next(n)) {
struct proxy *px = container_of(n, struct proxy, conf.id);
if (px->uuid != id)
break;
if ((px->cap & cap) != cap)
continue;
if (table && (!px->table || !px->table->size))
continue;
return px;
}
return NULL;
}
/* Returns a pointer to the first proxy matching either name <name>, or id
* <name> if <name> begins with a '#'. NULL is returned if no match is found.
* If <table> is non-zero, it only considers proxies having a table.
*/
struct proxy *proxy_find_by_name(const char *name, int cap, int table)
{
struct proxy *curproxy;
if (*name == '#') {
curproxy = proxy_find_by_id(atoi(name + 1), cap, table);
if (curproxy)
return curproxy;
}
else {
struct ebpt_node *node;
for (node = ebis_lookup(&proxy_by_name, name); node; node = ebpt_next(node)) {
curproxy = container_of(node, struct proxy, conf.by_name);
if (strcmp(curproxy->id, name) != 0)
break;
if ((curproxy->cap & cap) != cap)
continue;
if (table && (!curproxy->table || !curproxy->table->size))
continue;
return curproxy;
}
}
return NULL;
}
/* Finds the best match for a proxy with capabilities <cap>, name <name> and id
* <id>. At most one of <id> or <name> may be different provided that <cap> is
* valid. Either <id> or <name> may be left unspecified (0). The purpose is to
* find a proxy based on some information from a previous configuration, across
* reloads or during information exchange between peers.
*
* Names are looked up first if present, then IDs are compared if present. In
* case of an inexact match whatever is forced in the configuration has
* precedence in the following order :
* - 1) forced ID (proves a renaming / change of proxy type)
* - 2) proxy name+type (may indicate a move if ID differs)
* - 3) automatic ID+type (may indicate a renaming)
*
* Depending on what is found, we can end up in the following situations :
*
* name id cap | possible causes
* -------------+-----------------
* -- -- -- | nothing found
* -- -- ok | nothing found
* -- ok -- | proxy deleted, ID points to next one
* -- ok ok | proxy renamed, or deleted with ID pointing to next one
* ok -- -- | proxy deleted, but other half with same name still here (before)
* ok -- ok | proxy's ID changed (proxy moved in the config file)
* ok ok -- | proxy deleted, but other half with same name still here (after)
* ok ok ok | perfect match
*
* Upon return if <diff> is not NULL, it is zeroed then filled with up to 3 bits :
* - PR_FBM_MISMATCH_ID : proxy was found but ID differs
* (and ID was not zero)
* - PR_FBM_MISMATCH_NAME : proxy was found by ID but name differs
* (and name was not NULL)
* - PR_FBM_MISMATCH_PROXYTYPE : a proxy of different type was found with
* the same name and/or id
*
* Only a valid proxy is returned. If capabilities do not match, NULL is
* returned. The caller can check <diff> to report detailed warnings / errors,
* and decide whether or not to use what was found.
*/
struct proxy *proxy_find_best_match(int cap, const char *name, int id, int *diff)
{
struct proxy *byname;
struct proxy *byid;
if (!name && !id)
return NULL;
if (diff)
*diff = 0;
byname = byid = NULL;
if (name) {
byname = proxy_find_by_name(name, cap, 0);
if (byname && (!id || byname->uuid == id))
return byname;
}
/* remaining possibilities :
* - name not set
* - name set but not found
* - name found, but ID doesn't match.
*/
if (id) {
byid = proxy_find_by_id(id, cap, 0);
if (byid) {
if (byname) {
/* id+type found, name+type found, but not all 3.
* ID wins only if forced, otherwise name wins.
*/
if (byid->options & PR_O_FORCED_ID) {
if (diff)
*diff |= PR_FBM_MISMATCH_NAME;
return byid;
}
else {
if (diff)
*diff |= PR_FBM_MISMATCH_ID;
return byname;
}
}
/* remaining possibilities :
* - name not set
* - name set but not found
*/
if (name && diff)
*diff |= PR_FBM_MISMATCH_NAME;
return byid;
}
/* ID not found */
if (byname) {
if (diff)
*diff |= PR_FBM_MISMATCH_ID;
return byname;
}
}
/* All remaining possibilities will lead to NULL. If we can report more
* detailed information to the caller about changed types and/or name,
* we'll do it. For example, we could detect that "listen foo" was
* split into "frontend foo_ft" and "backend foo_bk" if IDs are forced.
* - name not set, ID not found
* - name not found, ID not set
* - name not found, ID not found
*/
if (!diff)
return NULL;
if (name) {
byname = proxy_find_by_name(name, 0, 0);
if (byname && (!id || byname->uuid == id))
*diff |= PR_FBM_MISMATCH_PROXYTYPE;
}
if (id) {
byid = proxy_find_by_id(id, 0, 0);
if (byid) {
if (!name)
*diff |= PR_FBM_MISMATCH_PROXYTYPE; /* only type changed */
else if (byid->options & PR_O_FORCED_ID)
*diff |= PR_FBM_MISMATCH_NAME | PR_FBM_MISMATCH_PROXYTYPE; /* name and type changed */
/* otherwise it's a different proxy that was returned */
}
}
return NULL;
}
/*
* This function finds a server with matching name within selected proxy.
* It also checks if there are more matching servers with
* requested name as this often leads into unexpected situations.
*/
struct server *findserver(const struct proxy *px, const char *name) {
struct server *cursrv, *target = NULL;
if (!px)
return NULL;
for (cursrv = px->srv; cursrv; cursrv = cursrv->next) {
if (strcmp(cursrv->id, name))
continue;
if (!target) {
target = cursrv;
continue;
}
ha_alert("Refusing to use duplicated server '%s' found in proxy: %s!\n",
name, px->id);
return NULL;
}
return target;
}
/* This function checks that the designated proxy has no http directives
* enabled. It will output a warning if there are, and will fix some of them.
* It returns the number of fatal errors encountered. This should be called
* at the end of the configuration parsing if the proxy is not in http mode.
* The <file> argument is used to construct the error message.
*/
int proxy_cfg_ensure_no_http(struct proxy *curproxy)
{
if (curproxy->cookie_name != NULL) {
ha_warning("config : cookie will be ignored for %s '%s' (needs 'mode http').\n",
proxy_type_str(curproxy), curproxy->id);
}
if (curproxy->rsp_exp != NULL) {
ha_warning("config : server regular expressions will be ignored for %s '%s' (needs 'mode http').\n",
proxy_type_str(curproxy), curproxy->id);
}
if (curproxy->req_exp != NULL) {
ha_warning("config : client regular expressions will be ignored for %s '%s' (needs 'mode http').\n",
proxy_type_str(curproxy), curproxy->id);
}
if (curproxy->monitor_uri != NULL) {
ha_warning("config : monitor-uri will be ignored for %s '%s' (needs 'mode http').\n",
proxy_type_str(curproxy), curproxy->id);
}
if (curproxy->lbprm.algo & BE_LB_NEED_HTTP) {
curproxy->lbprm.algo &= ~BE_LB_ALGO;
curproxy->lbprm.algo |= BE_LB_ALGO_RR;
ha_warning("config : Layer 7 hash not possible for %s '%s' (needs 'mode http'). Falling back to round robin.\n",
proxy_type_str(curproxy), curproxy->id);
}
if (curproxy->to_log & (LW_REQ | LW_RESP)) {
curproxy->to_log &= ~(LW_REQ | LW_RESP);
ha_warning("parsing [%s:%d] : HTTP log/header format not usable with %s '%s' (needs 'mode http').\n",
curproxy->conf.lfs_file, curproxy->conf.lfs_line,
proxy_type_str(curproxy), curproxy->id);
}
if (curproxy->conf.logformat_string == default_http_log_format ||
curproxy->conf.logformat_string == clf_http_log_format) {
/* Note: we don't change the directive's file:line number */
curproxy->conf.logformat_string = default_tcp_log_format;
ha_warning("parsing [%s:%d] : 'option httplog' not usable with %s '%s' (needs 'mode http'). Falling back to 'option tcplog'.\n",
curproxy->conf.lfs_file, curproxy->conf.lfs_line,
proxy_type_str(curproxy), curproxy->id);
}
return 0;
}
/* Perform the most basic initialization of a proxy :
* memset(), list_init(*), reset_timeouts(*).
* Any new proxy or peer should be initialized via this function.
*/
void init_new_proxy(struct proxy *p)
{
memset(p, 0, sizeof(struct proxy));
p->obj_type = OBJ_TYPE_PROXY;
p->pendconns = EB_ROOT;
LIST_INIT(&p->acl);
LIST_INIT(&p->http_req_rules);
LIST_INIT(&p->http_res_rules);
LIST_INIT(&p->block_rules);
LIST_INIT(&p->redirect_rules);
LIST_INIT(&p->mon_fail_cond);
LIST_INIT(&p->switching_rules);
LIST_INIT(&p->server_rules);
LIST_INIT(&p->persist_rules);
LIST_INIT(&p->sticking_rules);
LIST_INIT(&p->storersp_rules);
LIST_INIT(&p->tcp_req.inspect_rules);
LIST_INIT(&p->tcp_rep.inspect_rules);
LIST_INIT(&p->tcp_req.l4_rules);
LIST_INIT(&p->tcp_req.l5_rules);
LIST_INIT(&p->req_add);
LIST_INIT(&p->rsp_add);
LIST_INIT(&p->listener_queue);
LIST_INIT(&p->logsrvs);
LIST_INIT(&p->logformat);
LIST_INIT(&p->logformat_sd);
LIST_INIT(&p->format_unique_id);
LIST_INIT(&p->conf.bind);
LIST_INIT(&p->conf.listeners);
LIST_INIT(&p->conf.args.list);
LIST_INIT(&p->tcpcheck_rules);
LIST_INIT(&p->filter_configs);
/* Timeouts are defined as -1 */
proxy_reset_timeouts(p);
p->tcp_rep.inspect_delay = TICK_ETERNITY;
/* initial uuid is unassigned (-1) */
p->uuid = -1;
/* HTX is the default mode, for HTTP and TCP */
p->options2 |= PR_O2_USE_HTX;
/* Default to only allow L4 retries */
p->retry_type = PR_RE_CONN_FAILED;
HA_SPIN_INIT(&p->lock);
}
/*
* This function creates all proxy sockets. It should be done very early,
* typically before privileges are dropped. The sockets will be registered
* but not added to any fd_set, in order not to loose them across the fork().
* The proxies also start in READY state because they all have their listeners
* bound.
*
* Its return value is composed from ERR_NONE, ERR_RETRYABLE and ERR_FATAL.
* Retryable errors will only be printed if <verbose> is not zero.
*/
int start_proxies(int verbose)
{
struct proxy *curproxy;
struct listener *listener;
int lerr, err = ERR_NONE;
int pxerr;
char msg[100];
for (curproxy = proxies_list; curproxy != NULL; curproxy = curproxy->next) {
if (curproxy->state != PR_STNEW)
continue; /* already initialized */
pxerr = 0;
list_for_each_entry(listener, &curproxy->conf.listeners, by_fe) {
if (listener->state != LI_ASSIGNED)
continue; /* already started */
lerr = listener->proto->bind(listener, msg, sizeof(msg));
/* errors are reported if <verbose> is set or if they are fatal */
if (verbose || (lerr & (ERR_FATAL | ERR_ABORT))) {
if (lerr & ERR_ALERT)
ha_alert("Starting %s %s: %s\n",
proxy_type_str(curproxy), curproxy->id, msg);
else if (lerr & ERR_WARN)
ha_warning("Starting %s %s: %s\n",
proxy_type_str(curproxy), curproxy->id, msg);
}
err |= lerr;
if (lerr & (ERR_ABORT | ERR_FATAL)) {
pxerr |= 1;
break;
}
else if (lerr & ERR_CODE) {
pxerr |= 1;
continue;
}
}
if (!pxerr) {
curproxy->state = PR_STREADY;
send_log(curproxy, LOG_NOTICE, "Proxy %s started.\n", curproxy->id);
}
if (err & ERR_ABORT)
break;
}
return err;
}
/*
* This is the proxy management task. It enables proxies when there are enough
* free streams, or stops them when the table is full. It is designed to be
* called as a task which is woken up upon stopping or when rate limiting must
* be enforced.
*/
struct task *manage_proxy(struct task *t, void *context, unsigned short state)
{
struct proxy *p = context;
int next = TICK_ETERNITY;
unsigned int wait;
/* We should periodically try to enable listeners waiting for a
* global resource here.
*/
/* first, let's check if we need to stop the proxy */
if (unlikely(stopping && p->state != PR_STSTOPPED)) {
int t;
t = tick_remain(now_ms, p->stop_time);
if (t == 0) {
ha_warning("Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n",
p->id, p->fe_counters.cum_conn, p->be_counters.cum_conn);
send_log(p, LOG_WARNING, "Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n",
p->id, p->fe_counters.cum_conn, p->be_counters.cum_conn);
stop_proxy(p);
/* try to free more memory */
pool_gc(NULL);
}
else {
next = tick_first(next, p->stop_time);
}
}
/* If the proxy holds a stick table, we need to purge all unused
* entries. These are all the ones in the table with ref_cnt == 0
* and all the ones in the pool used to allocate new entries. Any
* entry attached to an existing stream waiting for a store will
* be in neither list. Any entry being dumped will have ref_cnt > 0.
* However we protect tables that are being synced to peers.
*/
if (unlikely(stopping && p->state == PR_STSTOPPED && p->table && p->table->current)) {
if (!p->table->syncing) {
stktable_trash_oldest(p->table, p->table->current);
pool_gc(NULL);
}
if (p->table->current) {
/* some entries still remain, let's recheck in one second */
next = tick_first(next, tick_add(now_ms, 1000));
}
}
/* the rest below is just for frontends */
if (!(p->cap & PR_CAP_FE))
goto out;
/* check the various reasons we may find to block the frontend */
if (unlikely(p->feconn >= p->maxconn)) {
if (p->state == PR_STREADY)
p->state = PR_STFULL;
goto out;
}
/* OK we have no reason to block, so let's unblock if we were blocking */
if (p->state == PR_STFULL)
p->state = PR_STREADY;
if (p->fe_sps_lim &&
(wait = next_event_delay(&p->fe_sess_per_sec, p->fe_sps_lim, 0))) {
/* we're blocking because a limit was reached on the number of
* requests/s on the frontend. We want to re-check ASAP, which
* means in 1 ms before estimated expiration date, because the
* timer will have settled down.
*/
next = tick_first(next, tick_add(now_ms, wait));
goto out;
}
/* The proxy is not limited so we can re-enable any waiting listener */
if (!LIST_ISEMPTY(&p->listener_queue))
dequeue_all_listeners(&p->listener_queue);
out:
t->expire = next;
task_queue(t);
return t;
}
static int proxy_parse_hard_stop_after(char **args, int section_type, struct proxy *curpx,
struct proxy *defpx, const char *file, int line,
char **err)
{
const char *res;
if (!*args[1]) {
memprintf(err, "'%s' expects <time> as argument.\n", args[0]);
return -1;
}
res = parse_time_err(args[1], &global.hard_stop_after, TIME_UNIT_MS);
if (res == PARSE_TIME_OVER) {
memprintf(err, "timer overflow in argument '%s' to '%s' (maximum value is 2147483647 ms or ~24.8 days)",
args[1], args[0]);
return -1;
}
else if (res == PARSE_TIME_UNDER) {
memprintf(err, "timer underflow in argument '%s' to '%s' (minimum non-null value is 1 ms)",
args[1], args[0]);
return -1;
}
else if (res) {
memprintf(err, "unexpected character '%c' in argument to <%s>.\n", *res, args[0]);
return -1;
}
return 0;
}
struct task *hard_stop(struct task *t, void *context, unsigned short state)
{
struct proxy *p;
struct stream *s;
if (killed) {
ha_warning("Some tasks resisted to hard-stop, exiting now.\n");
send_log(NULL, LOG_WARNING, "Some tasks resisted to hard-stop, exiting now.\n");
killed = 2;
t->expire = TICK_ETERNITY;
return t;
}
ha_warning("soft-stop running for too long, performing a hard-stop.\n");
send_log(NULL, LOG_WARNING, "soft-stop running for too long, performing a hard-stop.\n");
p = proxies_list;
while (p) {
if ((p->cap & PR_CAP_FE) && (p->feconn > 0)) {
ha_warning("Proxy %s hard-stopped (%d remaining conns will be closed).\n",
p->id, p->feconn);
send_log(p, LOG_WARNING, "Proxy %s hard-stopped (%d remaining conns will be closed).\n",
p->id, p->feconn);
}
p = p->next;
}
list_for_each_entry(s, &streams, list) {
stream_shutdown(s, SF_ERR_KILLED);
}
killed = 1;
t->expire = tick_add(now_ms, MS_TO_TICKS(1000));
return t;
}
/*
* this function disables health-check servers so that the process will quickly be ignored
* by load balancers. Note that if a proxy was already in the PAUSED state, then its grace
* time will not be used since it would already not listen anymore to the socket.
*/
void soft_stop(void)
{
struct proxy *p;
struct peers *prs;
struct task *task;
stopping = 1;
if (tick_isset(global.hard_stop_after)) {
task = task_new(MAX_THREADS_MASK);
if (task) {
task->process = hard_stop;
task_schedule(task, tick_add(now_ms, global.hard_stop_after));
}
else {
ha_alert("out of memory trying to allocate the hard-stop task.\n");
}
}
p = proxies_list;
tv_update_date(0,1); /* else, the old time before select will be used */
while (p) {
/* Zombie proxy, let's close the file descriptors */
if (p->state == PR_STSTOPPED &&
!LIST_ISEMPTY(&p->conf.listeners) &&
LIST_ELEM(p->conf.listeners.n,
struct listener *, by_fe)->state >= LI_ZOMBIE) {
struct listener *l;
list_for_each_entry(l, &p->conf.listeners, by_fe) {
if (l->state >= LI_ZOMBIE)
close(l->fd);
l->state = LI_INIT;
}
}
if (p->state != PR_STSTOPPED) {
ha_warning("Stopping %s %s in %d ms.\n", proxy_cap_str(p->cap), p->id, p->grace);
send_log(p, LOG_WARNING, "Stopping %s %s in %d ms.\n", proxy_cap_str(p->cap), p->id, p->grace);
p->stop_time = tick_add(now_ms, p->grace);
/* Note: do not wake up stopped proxies' task nor their tables'
* tasks as these ones might point to already released entries.
*/
if (p->table && p->table->size && p->table->sync_task)
task_wakeup(p->table->sync_task, TASK_WOKEN_MSG);
if (p->task)
task_wakeup(p->task, TASK_WOKEN_MSG);
}
p = p->next;
}
prs = cfg_peers;
while (prs) {
if (prs->peers_fe)
stop_proxy(prs->peers_fe);
prs = prs->next;
}
/* signal zero is used to broadcast the "stopping" event */
signal_handler(0);
}
/* Temporarily disables listening on all of the proxy's listeners. Upon
* success, the proxy enters the PR_PAUSED state. If disabling at least one
* listener returns an error, then the proxy state is set to PR_STERROR
* because we don't know how to resume from this. The function returns 0
* if it fails, or non-zero on success.
*/
int pause_proxy(struct proxy *p)
{
struct listener *l;
if (!(p->cap & PR_CAP_FE) || p->state == PR_STERROR ||
p->state == PR_STSTOPPED || p->state == PR_STPAUSED)
return 1;
ha_warning("Pausing %s %s.\n", proxy_cap_str(p->cap), p->id);
send_log(p, LOG_WARNING, "Pausing %s %s.\n", proxy_cap_str(p->cap), p->id);
list_for_each_entry(l, &p->conf.listeners, by_fe) {
if (!pause_listener(l))
p->state = PR_STERROR;
}
if (p->state == PR_STERROR) {
ha_warning("%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id);
send_log(p, LOG_WARNING, "%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id);
return 0;
}
p->state = PR_STPAUSED;
return 1;
}
/* This function makes the proxy unusable, but keeps the listening sockets
* opened, so that if any process requests them, we are able to serve them.
* This should only be called early, before we started accepting requests.
*/
void zombify_proxy(struct proxy *p)
{
struct listener *l;
struct listener *first_to_listen = NULL;
list_for_each_entry(l, &p->conf.listeners, by_fe) {
enum li_state oldstate = l->state;
unbind_listener_no_close(l);
if (l->state >= LI_ASSIGNED) {
delete_listener(l);
}
/*
* Pretend we're still up and running so that the fd
* will be sent if asked.
*/
l->state = LI_ZOMBIE;
if (!first_to_listen && oldstate >= LI_LISTEN)
first_to_listen = l;
}
/* Quick hack : at stop time, to know we have to close the sockets
* despite the proxy being marked as stopped, make the first listener
* of the listener list an active one, so that we don't have to
* parse the whole list to be sure.
*/
if (first_to_listen && LIST_ELEM(p->conf.listeners.n,
struct listener *, by_fe) != first_to_listen) {
LIST_DEL(&l->by_fe);
LIST_ADD(&p->conf.listeners, &l->by_fe);
}
p->state = PR_STSTOPPED;
}
/*
* This function completely stops a proxy and releases its listeners. It has
* to be called when going down in order to release the ports so that another
* process may bind to them. It must also be called on disabled proxies at the
* end of start-up. If all listeners are closed, the proxy is set to the
* PR_STSTOPPED state.
*/
void stop_proxy(struct proxy *p)
{
struct listener *l;
int nostop = 0;
list_for_each_entry(l, &p->conf.listeners, by_fe) {
if (l->options & LI_O_NOSTOP) {
HA_ATOMIC_ADD(&unstoppable_jobs, 1);
nostop = 1;
continue;
}
unbind_listener(l);
if (l->state >= LI_ASSIGNED) {
delete_listener(l);
}
}
if (!nostop)
p->state = PR_STSTOPPED;
}
/* This function resumes listening on the specified proxy. It scans all of its
* listeners and tries to enable them all. If any of them fails, the proxy is
* put back to the paused state. It returns 1 upon success, or zero if an error
* is encountered.
*/
int resume_proxy(struct proxy *p)
{
struct listener *l;
int fail;
if (p->state != PR_STPAUSED)
return 1;
ha_warning("Enabling %s %s.\n", proxy_cap_str(p->cap), p->id);
send_log(p, LOG_WARNING, "Enabling %s %s.\n", proxy_cap_str(p->cap), p->id);
fail = 0;
list_for_each_entry(l, &p->conf.listeners, by_fe) {
if (!resume_listener(l)) {
int port;
port = get_host_port(&l->addr);
if (port) {
ha_warning("Port %d busy while trying to enable %s %s.\n",
port, proxy_cap_str(p->cap), p->id);
send_log(p, LOG_WARNING, "Port %d busy while trying to enable %s %s.\n",
port, proxy_cap_str(p->cap), p->id);
}
else {
ha_warning("Bind on socket %d busy while trying to enable %s %s.\n",
l->luid, proxy_cap_str(p->cap), p->id);
send_log(p, LOG_WARNING, "Bind on socket %d busy while trying to enable %s %s.\n",
l->luid, proxy_cap_str(p->cap), p->id);
}
/* Another port might have been enabled. Let's stop everything. */
fail = 1;
break;
}
}
p->state = PR_STREADY;
if (fail) {
pause_proxy(p);
return 0;
}
return 1;
}
/*
* This function temporarily disables listening so that another new instance
* can start listening. It is designed to be called upon reception of a
* SIGTTOU, after which either a SIGUSR1 can be sent to completely stop
* the proxy, or a SIGTTIN can be sent to listen again.
*/
void pause_proxies(void)
{
int err;
struct proxy *p;
struct peers *prs;
err = 0;
p = proxies_list;
tv_update_date(0,1); /* else, the old time before select will be used */
while (p) {
err |= !pause_proxy(p);
p = p->next;
}
prs = cfg_peers;
while (prs) {
if (prs->peers_fe)
err |= !pause_proxy(prs->peers_fe);
prs = prs->next;
}
if (err) {
ha_warning("Some proxies refused to pause, performing soft stop now.\n");
send_log(p, LOG_WARNING, "Some proxies refused to pause, performing soft stop now.\n");
soft_stop();
}
}
/*
* This function reactivates listening. This can be used after a call to
* sig_pause(), for example when a new instance has failed starting up.
* It is designed to be called upon reception of a SIGTTIN.
*/
void resume_proxies(void)
{
int err;
struct proxy *p;
struct peers *prs;
err = 0;
p = proxies_list;
tv_update_date(0,1); /* else, the old time before select will be used */
while (p) {
err |= !resume_proxy(p);
p = p->next;
}
prs = cfg_peers;
while (prs) {
if (prs->peers_fe)
err |= !resume_proxy(prs->peers_fe);
prs = prs->next;
}
if (err) {
ha_warning("Some proxies refused to resume, a restart is probably needed to resume safe operations.\n");
send_log(p, LOG_WARNING, "Some proxies refused to resume, a restart is probably needed to resume safe operations.\n");
}
}
/* Set current stream's backend to <be>. Nothing is done if the
* stream already had a backend assigned, which is indicated by
* s->flags & SF_BE_ASSIGNED.
* All flags, stats and counters which need be updated are updated.
* Returns 1 if done, 0 in case of internal error, eg: lack of resource.
*/
int stream_set_backend(struct stream *s, struct proxy *be)
{
if (s->flags & SF_BE_ASSIGNED)
return 1;
if (flt_set_stream_backend(s, be) < 0)
return 0;
s->be = be;
HA_ATOMIC_UPDATE_MAX(&be->be_counters.conn_max,
HA_ATOMIC_ADD(&be->beconn, 1));
proxy_inc_be_ctr(be);
/* HTX/legacy must match */
if ((strm_fe(s)->options2 ^ be->options2) & PR_O2_USE_HTX)
return 0;
/* assign new parameters to the stream from the new backend */
s->si[1].flags &= ~SI_FL_INDEP_STR;
if (be->options2 & PR_O2_INDEPSTR)
s->si[1].flags |= SI_FL_INDEP_STR;
if (tick_isset(be->timeout.serverfin))
s->si[1].hcto = be->timeout.serverfin;
/* We want to enable the backend-specific analysers except those which
* were already run as part of the frontend/listener. Note that it would
* be more reliable to store the list of analysers that have been run,
* but what we do here is OK for now.
*/
s->req.analysers |= be->be_req_ana & ~(strm_li(s) ? strm_li(s)->analysers : 0);
/* If the target backend requires HTTP processing, we have to allocate
* the HTTP transaction and hdr_idx if we did not have one.
*/
if (unlikely(!s->txn && be->http_needed)) {
if (unlikely(!http_alloc_txn(s)))
return 0; /* not enough memory */
/* and now initialize the HTTP transaction state */
http_init_txn(s);
}
/* Be sure to filter request headers if the backend is an HTTP proxy and
* if there are filters attached to the stream. */
if (s->be->mode == PR_MODE_HTTP && HAS_FILTERS(s))
s->req.analysers |= AN_REQ_FLT_HTTP_HDRS;
if (s->txn) {
if (be->options2 & PR_O2_RSPBUG_OK)
s->txn->rsp.err_pos = -1; /* let buggy responses pass */
/* If we chain to an HTTP backend running a different HTTP mode, we
* have to re-adjust the desired keep-alive/close mode to accommodate
* both the frontend's and the backend's modes.
*/
if (strm_fe(s)->mode == PR_MODE_HTTP && be->mode == PR_MODE_HTTP &&
((strm_fe(s)->options & PR_O_HTTP_MODE) != (be->options & PR_O_HTTP_MODE)))
http_adjust_conn_mode(s, s->txn, &s->txn->req);
/* If we chain a TCP frontend to an HTX backend, we must upgrade
* the client mux */
if (!IS_HTX_STRM(s) && be->mode == PR_MODE_HTTP && (be->options2 & PR_O2_USE_HTX)) {
struct connection *conn = objt_conn(strm_sess(s)->origin);
struct conn_stream *cs = objt_cs(s->si[0].end);
if (conn && cs) {
si_rx_endp_more(&s->si[0]);
if (conn_upgrade_mux_fe(conn, cs, &s->req.buf, ist(""), PROTO_MODE_HTX) == -1)
return 0;
s->flags |= SF_HTX;
}
}
/* If an LB algorithm needs to access some pre-parsed body contents,
* we must not start to forward anything until the connection is
* confirmed otherwise we'll lose the pointer to these data and
* prevent the hash from being doable again after a redispatch.
*/
if (be->mode == PR_MODE_HTTP &&
(be->lbprm.algo & (BE_LB_KIND | BE_LB_PARM)) == (BE_LB_KIND_HI | BE_LB_HASH_PRM))
s->txn->req.flags |= HTTP_MSGF_WAIT_CONN;
/* we may request to parse a request body */
if ((be->options & PR_O_WREQ_BODY) &&
(s->txn->req.body_len || (s->txn->req.flags & HTTP_MSGF_TE_CHNK)))
s->req.analysers |= AN_REQ_HTTP_BODY;
}
s->flags |= SF_BE_ASSIGNED;
if (be->options2 & PR_O2_NODELAY) {
s->req.flags |= CF_NEVER_WAIT;
s->res.flags |= CF_NEVER_WAIT;
}
return 1;
}
/* Capture a bad request or response and archive it in the proxy's structure.
* It is relatively protocol-agnostic so it requires that a number of elements
* are passed :
* - <proxy> is the proxy where the error was detected and where the snapshot
* needs to be stored
* - <is_back> indicates that the error happened when receiving the response
* - <other_end> is a pointer to the proxy on the other side when known
* - <target> is the target of the connection, usually a server or a proxy
* - <sess> is the session which experienced the error
* - <ctx> may be NULL or should contain any info relevant to the protocol
* - <buf> is the buffer containing the offending data
* - <buf_ofs> is the position of this buffer's input data in the input
* stream, starting at zero. It may be passed as zero if unknown.
* - <buf_out> is the portion of <buf->data> which was already forwarded and
* which precedes the buffer's input. The buffer's input starts at
* buf->head + buf_out.
* - <err_pos> is the pointer to the faulty byte in the buffer's input.
* - <show> is the callback to use to display <ctx>. It may be NULL.
*/
void proxy_capture_error(struct proxy *proxy, int is_back,
struct proxy *other_end, enum obj_type *target,
const struct session *sess,
const struct buffer *buf, long buf_ofs,
unsigned int buf_out, unsigned int err_pos,
const union error_snapshot_ctx *ctx,
void (*show)(struct buffer *, const struct error_snapshot *))
{
struct error_snapshot *es;
unsigned int buf_len;
int len1, len2;
unsigned int ev_id;
ev_id = HA_ATOMIC_XADD(&error_snapshot_id, 1);
buf_len = b_data(buf) - buf_out;
es = malloc(sizeof(*es) + buf_len);
if (!es)
return;
es->buf_len = buf_len;
es->ev_id = ev_id;
len1 = b_size(buf) - buf_len;
if (len1 > buf_len)
len1 = buf_len;
if (len1) {
memcpy(es->buf, b_peek(buf, buf_out), len1);
len2 = buf_len - len1;
if (len2)
memcpy(es->buf + len1, b_orig(buf), len2);
}
es->buf_err = err_pos;
es->when = date; // user-visible date
es->srv = objt_server(target);
es->oe = other_end;
if (objt_conn(sess->origin))
es->src = __objt_conn(sess->origin)->addr.from;
else
memset(&es->src, 0, sizeof(es->src));
es->buf_wrap = b_wrap(buf) - b_peek(buf, buf_out);
es->buf_out = buf_out;
es->buf_ofs = buf_ofs;
/* be sure to indicate the offset of the first IN byte */
if (es->buf_ofs >= es->buf_len)
es->buf_ofs -= es->buf_len;
else
es->buf_ofs = 0;
/* protocol-specific part now */
if (ctx)
es->ctx = *ctx;
else
memset(&es->ctx, 0, sizeof(es->ctx));
es->show = show;
/* note: we still lock since we have to be certain that nobody is
* dumping the output while we free.
*/
HA_SPIN_LOCK(PROXY_LOCK, &proxy->lock);
if (is_back) {
es = HA_ATOMIC_XCHG(&proxy->invalid_rep, es);
} else {
es = HA_ATOMIC_XCHG(&proxy->invalid_req, es);
}
free(es);
HA_SPIN_UNLOCK(PROXY_LOCK, &proxy->lock);
}
/* Configure all proxies which lack a maxconn setting to use the global one by
* default. This avoids the common mistake consisting in setting maxconn only
* in the global section and discovering the hard way that it doesn't propagate
* through the frontends. These values are also propagated through the various
* targetted backends, whose fullconn is finally calculated if not yet set.
*/
void proxy_adjust_all_maxconn()
{
struct proxy *curproxy;
struct switching_rule *swrule1, *swrule2;
for (curproxy = proxies_list; curproxy; curproxy = curproxy->next) {
if (curproxy->state == PR_STSTOPPED)
continue;
if (!(curproxy->cap & PR_CAP_FE))
continue;
if (!curproxy->maxconn)
curproxy->maxconn = global.maxconn;
/* update the target backend's fullconn count : default_backend */
if (curproxy->defbe.be)
curproxy->defbe.be->tot_fe_maxconn += curproxy->maxconn;
else if ((curproxy->cap & PR_CAP_LISTEN) == PR_CAP_LISTEN)
curproxy->tot_fe_maxconn += curproxy->maxconn;
list_for_each_entry(swrule1, &curproxy->switching_rules, list) {
/* For each target of switching rules, we update their
* tot_fe_maxconn, except if a previous rule points to
* the same backend or to the default backend.
*/
if (swrule1->be.backend != curproxy->defbe.be) {
/* note: swrule1->be.backend isn't a backend if the rule
* is dynamic, it's an expression instead, so it must not
* be dereferenced as a backend before being certain it is.
*/
list_for_each_entry(swrule2, &curproxy->switching_rules, list) {
if (swrule2 == swrule1) {
if (!swrule1->dynamic)
swrule1->be.backend->tot_fe_maxconn += curproxy->maxconn;
break;
}
else if (!swrule2->dynamic && swrule2->be.backend == swrule1->be.backend) {
/* there are multiple refs of this backend */
break;
}
}
}
}
}
/* automatically compute fullconn if not set. We must not do it in the
* loop above because cross-references are not yet fully resolved.
*/
for (curproxy = proxies_list; curproxy; curproxy = curproxy->next) {
if (curproxy->state == PR_STSTOPPED)
continue;
/* If <fullconn> is not set, let's set it to 10% of the sum of
* the possible incoming frontend's maxconns.
*/
if (!curproxy->fullconn && (curproxy->cap & PR_CAP_BE)) {
/* we have the sum of the maxconns in <total>. We only
* keep 10% of that sum to set the default fullconn, with
* a hard minimum of 1 (to avoid a divide by zero).
*/
curproxy->fullconn = (curproxy->tot_fe_maxconn + 9) / 10;
if (!curproxy->fullconn)
curproxy->fullconn = 1;
}
}
}
/* Config keywords below */
static struct cfg_kw_list cfg_kws = {ILH, {
{ CFG_GLOBAL, "hard-stop-after", proxy_parse_hard_stop_after },
{ CFG_LISTEN, "timeout", proxy_parse_timeout },
{ CFG_LISTEN, "clitimeout", proxy_parse_timeout },
{ CFG_LISTEN, "contimeout", proxy_parse_timeout },
{ CFG_LISTEN, "srvtimeout", proxy_parse_timeout },
{ CFG_LISTEN, "rate-limit", proxy_parse_rate_limit },
{ CFG_LISTEN, "max-keep-alive-queue", proxy_parse_max_ka_queue },
{ CFG_LISTEN, "declare", proxy_parse_declare },
{ CFG_LISTEN, "retry-on", proxy_parse_retry_on },
{ 0, NULL, NULL },
}};
INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);
/* Expects to find a frontend named <arg> and returns it, otherwise displays various
* adequate error messages and returns NULL. This function is designed to be used by
* functions requiring a frontend on the CLI.
*/
struct proxy *cli_find_frontend(struct appctx *appctx, const char *arg)
{
struct proxy *px;
if (!*arg) {
appctx->ctx.cli.severity = LOG_ERR;
appctx->ctx.cli.msg = "A frontend name is expected.\n";
appctx->st0 = CLI_ST_PRINT;
return NULL;
}
px = proxy_fe_by_name(arg);
if (!px) {
appctx->ctx.cli.severity = LOG_ERR;
appctx->ctx.cli.msg = "No such frontend.\n";
appctx->st0 = CLI_ST_PRINT;
return NULL;
}
return px;
}
/* Expects to find a backend named <arg> and returns it, otherwise displays various
* adequate error messages and returns NULL. This function is designed to be used by
* functions requiring a frontend on the CLI.
*/
struct proxy *cli_find_backend(struct appctx *appctx, const char *arg)
{
struct proxy *px;
if (!*arg) {
appctx->ctx.cli.severity = LOG_ERR;
appctx->ctx.cli.msg = "A backend name is expected.\n";
appctx->st0 = CLI_ST_PRINT;
return NULL;
}
px = proxy_be_by_name(arg);
if (!px) {
appctx->ctx.cli.severity = LOG_ERR;
appctx->ctx.cli.msg = "No such backend.\n";
appctx->st0 = CLI_ST_PRINT;
return NULL;
}
return px;
}
/* parse a "show servers" CLI line, returns 0 if it wants to start the dump or
* 1 if it stops immediately. If an argument is specified, it will set the proxy
* pointer into cli.p0 and its ID into cli.i0.
*/
static int cli_parse_show_servers(char **args, char *payload, struct appctx *appctx, void *private)
{
struct proxy *px;
/* check if a backend name has been provided */
if (*args[3]) {
/* read server state from local file */
px = proxy_be_by_name(args[3]);
if (!px) {
appctx->ctx.cli.severity = LOG_ERR;
appctx->ctx.cli.msg = "Can't find backend.\n";
appctx->st0 = CLI_ST_PRINT;
return 1;
}
appctx->ctx.cli.p0 = px;
appctx->ctx.cli.i0 = px->uuid;
}
return 0;
}
/* dumps server state information into <buf> for all the servers found in backend cli.p0.
* These information are all the parameters which may change during HAProxy runtime.
* By default, we only export to the last known server state file format.
* These information can be used at next startup to recover same level of server state.
* It uses the proxy pointer from cli.p0, the proxy's id from cli.i0 and the server's
* pointer from cli.p1.
*/
static int dump_servers_state(struct stream_interface *si, struct buffer *buf)
{
struct appctx *appctx = __objt_appctx(si->end);
struct proxy *px = appctx->ctx.cli.p0;
struct server *srv;
char srv_addr[INET6_ADDRSTRLEN + 1];
time_t srv_time_since_last_change;
int bk_f_forced_id, srv_f_forced_id;
char *srvrecord;
/* we don't want to report any state if the backend is not enabled on this process */
if (!(proc_mask(px->bind_proc) & pid_bit))
return 1;
if (!appctx->ctx.cli.p1)
appctx->ctx.cli.p1 = px->srv;
for (; appctx->ctx.cli.p1 != NULL; appctx->ctx.cli.p1 = srv->next) {
srv = appctx->ctx.cli.p1;
srv_addr[0] = '\0';
switch (srv->addr.ss_family) {
case AF_INET:
inet_ntop(srv->addr.ss_family, &((struct sockaddr_in *)&srv->addr)->sin_addr,
srv_addr, INET_ADDRSTRLEN + 1);
break;
case AF_INET6:
inet_ntop(srv->addr.ss_family, &((struct sockaddr_in6 *)&srv->addr)->sin6_addr,
srv_addr, INET6_ADDRSTRLEN + 1);
break;
default:
memcpy(srv_addr, "-\0", 2);
break;
}
srv_time_since_last_change = now.tv_sec - srv->last_change;
bk_f_forced_id = px->options & PR_O_FORCED_ID ? 1 : 0;
srv_f_forced_id = srv->flags & SRV_F_FORCED_ID ? 1 : 0;
srvrecord = NULL;
if (srv->srvrq && srv->srvrq->name)
srvrecord = srv->srvrq->name;
chunk_appendf(buf,
"%d %s "
"%d %s %s "
"%d %d %d %d %ld "
"%d %d %d %d %d "
"%d %d %s %u %s"
"\n",
px->uuid, px->id,
srv->puid, srv->id, srv_addr,
srv->cur_state, srv->cur_admin, srv->uweight, srv->iweight, (long int)srv_time_since_last_change,
srv->check.status, srv->check.result, srv->check.health, srv->check.state, srv->agent.state,
bk_f_forced_id, srv_f_forced_id, srv->hostname ? srv->hostname : "-", srv->svc_port,
srvrecord ? srvrecord : "-");
if (ci_putchk(si_ic(si), &trash) == -1) {
si_rx_room_blk(si);
return 0;
}
}
return 1;
}
/* Parses backend list or simply use backend name provided by the user to return
* states of servers to stdout. It dumps proxy <cli.p0> and stops if <cli.i0> is
* non-null.
*/
static int cli_io_handler_servers_state(struct appctx *appctx)
{
struct stream_interface *si = appctx->owner;
struct proxy *curproxy;
chunk_reset(&trash);
if (appctx->st2 == STAT_ST_INIT) {
if (!appctx->ctx.cli.p0)
appctx->ctx.cli.p0 = proxies_list;
appctx->st2 = STAT_ST_HEAD;
}
if (appctx->st2 == STAT_ST_HEAD) {
chunk_printf(&trash, "%d\n# %s\n", SRV_STATE_FILE_VERSION, SRV_STATE_FILE_FIELD_NAMES);
if (ci_putchk(si_ic(si), &trash) == -1) {
si_rx_room_blk(si);
return 0;
}
appctx->st2 = STAT_ST_INFO;
}
/* STAT_ST_INFO */
for (; appctx->ctx.cli.p0 != NULL; appctx->ctx.cli.p0 = curproxy->next) {
curproxy = appctx->ctx.cli.p0;
/* servers are only in backends */
if (curproxy->cap & PR_CAP_BE) {
if (!dump_servers_state(si, &trash))
return 0;
}
/* only the selected proxy is dumped */
if (appctx->ctx.cli.i0)
break;
}
return 1;
}
/* Parses backend list and simply report backend names. It keeps the proxy
* pointer in cli.p0.
*/
static int cli_io_handler_show_backend(struct appctx *appctx)
{
struct stream_interface *si = appctx->owner;
struct proxy *curproxy;
chunk_reset(&trash);
if (!appctx->ctx.cli.p0) {
chunk_printf(&trash, "# name\n");
if (ci_putchk(si_ic(si), &trash) == -1) {
si_rx_room_blk(si);
return 0;
}
appctx->ctx.cli.p0 = proxies_list;
}
for (; appctx->ctx.cli.p0 != NULL; appctx->ctx.cli.p0 = curproxy->next) {
curproxy = appctx->ctx.cli.p0;
/* looking for backends only */
if (!(curproxy->cap & PR_CAP_BE))
continue;
/* we don't want to list a backend which is bound to this process */
if (!(proc_mask(curproxy->bind_proc) & pid_bit))
continue;
chunk_appendf(&trash, "%s\n", curproxy->id);
if (ci_putchk(si_ic(si), &trash) == -1) {
si_rx_room_blk(si);
return 0;
}
}
return 1;
}
/* Parses the "enable dynamic-cookies backend" directive, it always returns 1.
*
* Grabs the proxy lock and each server's lock.
*/
static int cli_parse_enable_dyncookie_backend(char **args, char *payload, struct appctx *appctx, void *private)
{
struct proxy *px;
struct server *s;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
px = cli_find_backend(appctx, args[3]);
if (!px)
return 1;
HA_SPIN_LOCK(PROXY_LOCK, &px->lock);
px->ck_opts |= PR_CK_DYNAMIC;
for (s = px->srv; s != NULL; s = s->next) {
HA_SPIN_LOCK(SERVER_LOCK, &s->lock);
srv_set_dyncookie(s);
HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);
}
HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock);
return 1;
}
/* Parses the "disable dynamic-cookies backend" directive, it always returns 1.
*
* Grabs the proxy lock and each server's lock.
*/
static int cli_parse_disable_dyncookie_backend(char **args, char *payload, struct appctx *appctx, void *private)
{
struct proxy *px;
struct server *s;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
px = cli_find_backend(appctx, args[3]);
if (!px)
return 1;
HA_SPIN_LOCK(PROXY_LOCK, &px->lock);
px->ck_opts &= ~PR_CK_DYNAMIC;
for (s = px->srv; s != NULL; s = s->next) {
HA_SPIN_LOCK(SERVER_LOCK, &s->lock);
if (!(s->flags & SRV_F_COOKIESET)) {
free(s->cookie);
s->cookie = NULL;
}
HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);
}
HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock);
return 1;
}
/* Parses the "set dynamic-cookie-key backend" directive, it always returns 1.
*
* Grabs the proxy lock and each server's lock.
*/
static int cli_parse_set_dyncookie_key_backend(char **args, char *payload, struct appctx *appctx, void *private)
{
struct proxy *px;
struct server *s;
char *newkey;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
px = cli_find_backend(appctx, args[3]);
if (!px)
return 1;
if (!*args[4]) {
appctx->ctx.cli.severity = LOG_ERR;
appctx->ctx.cli.msg = "String value expected.\n";
appctx->st0 = CLI_ST_PRINT;
return 1;
}
newkey = strdup(args[4]);
if (!newkey) {
appctx->ctx.cli.severity = LOG_ERR;
appctx->ctx.cli.msg = "Failed to allocate memory.\n";
appctx->st0 = CLI_ST_PRINT;
return 1;
}
HA_SPIN_LOCK(PROXY_LOCK, &px->lock);
free(px->dyncookie_key);
px->dyncookie_key = newkey;
for (s = px->srv; s != NULL; s = s->next) {
HA_SPIN_LOCK(SERVER_LOCK, &s->lock);
srv_set_dyncookie(s);
HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);
}
HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock);
return 1;
}
/* Parses the "set maxconn frontend" directive, it always returns 1.
*
* Grabs the proxy lock.
*/
static int cli_parse_set_maxconn_frontend(char **args, char *payload, struct appctx *appctx, void *private)
{
struct proxy *px;
struct listener *l;
int v;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
px = cli_find_frontend(appctx, args[3]);
if (!px)
return 1;
if (!*args[4]) {
appctx->ctx.cli.severity = LOG_ERR;
appctx->ctx.cli.msg = "Integer value expected.\n";
appctx->st0 = CLI_ST_PRINT;
return 1;
}
v = atoi(args[4]);
if (v < 0) {
appctx->ctx.cli.severity = LOG_ERR;
appctx->ctx.cli.msg = "Value out of range.\n";
appctx->st0 = CLI_ST_PRINT;
return 1;
}
/* OK, the value is fine, so we assign it to the proxy and to all of
* its listeners. The blocked ones will be dequeued.
*/
HA_SPIN_LOCK(PROXY_LOCK, &px->lock);
px->maxconn = v;
list_for_each_entry(l, &px->conf.listeners, by_fe) {
if (l->state == LI_FULL)
resume_listener(l);
}
if (px->maxconn > px->feconn && !LIST_ISEMPTY(&px->listener_queue))
dequeue_all_listeners(&px->listener_queue);
HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock);
return 1;
}
/* Parses the "shutdown frontend" directive, it always returns 1.
*
* Grabs the proxy lock.
*/
static int cli_parse_shutdown_frontend(char **args, char *payload, struct appctx *appctx, void *private)
{
struct proxy *px;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
px = cli_find_frontend(appctx, args[2]);
if (!px)
return 1;
if (px->state == PR_STSTOPPED) {
appctx->ctx.cli.severity = LOG_NOTICE;
appctx->ctx.cli.msg = "Frontend was already shut down.\n";
appctx->st0 = CLI_ST_PRINT;
return 1;
}
ha_warning("Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n",
px->id, px->fe_counters.cum_conn, px->be_counters.cum_conn);
send_log(px, LOG_WARNING, "Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n",
px->id, px->fe_counters.cum_conn, px->be_counters.cum_conn);
HA_SPIN_LOCK(PROXY_LOCK, &px->lock);
stop_proxy(px);
HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock);
return 1;
}
/* Parses the "disable frontend" directive, it always returns 1.
*
* Grabs the proxy lock.
*/
static int cli_parse_disable_frontend(char **args, char *payload, struct appctx *appctx, void *private)
{
struct proxy *px;
int ret;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
px = cli_find_frontend(appctx, args[2]);
if (!px)
return 1;
if (px->state == PR_STSTOPPED) {
appctx->ctx.cli.severity = LOG_NOTICE;
appctx->ctx.cli.msg = "Frontend was previously shut down, cannot disable.\n";
appctx->st0 = CLI_ST_PRINT;
return 1;
}
if (px->state == PR_STPAUSED) {
appctx->ctx.cli.severity = LOG_NOTICE;
appctx->ctx.cli.msg = "Frontend is already disabled.\n";
appctx->st0 = CLI_ST_PRINT;
return 1;
}
HA_SPIN_LOCK(PROXY_LOCK, &px->lock);
ret = pause_proxy(px);
HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock);
if (!ret) {
appctx->ctx.cli.severity = LOG_ERR;
appctx->ctx.cli.msg = "Failed to pause frontend, check logs for precise cause.\n";
appctx->st0 = CLI_ST_PRINT;
return 1;
}
return 1;
}
/* Parses the "enable frontend" directive, it always returns 1.
*
* Grabs the proxy lock.
*/
static int cli_parse_enable_frontend(char **args, char *payload, struct appctx *appctx, void *private)
{
struct proxy *px;
int ret;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
px = cli_find_frontend(appctx, args[2]);
if (!px)
return 1;
if (px->state == PR_STSTOPPED) {
appctx->ctx.cli.severity = LOG_ERR;
appctx->ctx.cli.msg = "Frontend was previously shut down, cannot enable.\n";
appctx->st0 = CLI_ST_PRINT;
return 1;
}
if (px->state != PR_STPAUSED) {
appctx->ctx.cli.severity = LOG_NOTICE;
appctx->ctx.cli.msg = "Frontend is already enabled.\n";
appctx->st0 = CLI_ST_PRINT;
return 1;
}
HA_SPIN_LOCK(PROXY_LOCK, &px->lock);
ret = resume_proxy(px);
HA_SPIN_UNLOCK(PROXY_LOCK, &px->lock);
if (!ret) {
appctx->ctx.cli.severity = LOG_ERR;
appctx->ctx.cli.msg = "Failed to resume frontend, check logs for precise cause (port conflict?).\n";
appctx->st0 = CLI_ST_PRINT;
return 1;
}
return 1;
}
/* "show errors" handler for the CLI. Returns 0 if wants to continue, 1 to stop
* now.
*/
static int cli_parse_show_errors(char **args, char *payload, struct appctx *appctx, void *private)
{
if (!cli_has_level(appctx, ACCESS_LVL_OPER))
return 1;
if (*args[2]) {
struct proxy *px;
px = proxy_find_by_name(args[2], 0, 0);
if (px)
appctx->ctx.errors.iid = px->uuid;
else
appctx->ctx.errors.iid = atoi(args[2]);
if (!appctx->ctx.errors.iid) {
appctx->ctx.cli.severity = LOG_ERR;
appctx->ctx.cli.msg = "No such proxy.\n";
appctx->st0 = CLI_ST_PRINT;
return 1;
}
}
else
appctx->ctx.errors.iid = -1; // dump all proxies
appctx->ctx.errors.flag = 0;
if (strcmp(args[3], "request") == 0)
appctx->ctx.errors.flag |= 4; // ignore response
else if (strcmp(args[3], "response") == 0)
appctx->ctx.errors.flag |= 2; // ignore request
appctx->ctx.errors.px = NULL;
return 0;
}
/* This function dumps all captured errors onto the stream interface's
* read buffer. It returns 0 if the output buffer is full and it needs
* to be called again, otherwise non-zero.
*/
static int cli_io_handler_show_errors(struct appctx *appctx)
{
struct stream_interface *si = appctx->owner;
extern const char *monthname[12];
if (unlikely(si_ic(si)->flags & (CF_WRITE_ERROR|CF_SHUTW)))
return 1;
chunk_reset(&trash);
if (!appctx->ctx.errors.px) {
/* the function had not been called yet, let's prepare the
* buffer for a response.
*/
struct tm tm;
get_localtime(date.tv_sec, &tm);
chunk_appendf(&trash, "Total events captured on [%02d/%s/%04d:%02d:%02d:%02d.%03d] : %u\n",
tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
tm.tm_hour, tm.tm_min, tm.tm_sec, (int)(date.tv_usec/1000),
error_snapshot_id);
if (ci_putchk(si_ic(si), &trash) == -1)
goto cant_send;
appctx->ctx.errors.px = proxies_list;
appctx->ctx.errors.bol = 0;
appctx->ctx.errors.ptr = -1;
}
/* we have two inner loops here, one for the proxy, the other one for
* the buffer.
*/
while (appctx->ctx.errors.px) {
struct error_snapshot *es;
HA_SPIN_LOCK(PROXY_LOCK, &appctx->ctx.errors.px->lock);
if ((appctx->ctx.errors.flag & 1) == 0) {
es = appctx->ctx.errors.px->invalid_req;
if (appctx->ctx.errors.flag & 2) // skip req
goto next;
}
else {
es = appctx->ctx.errors.px->invalid_rep;
if (appctx->ctx.errors.flag & 4) // skip resp
goto next;
}
if (!es)
goto next;
if (appctx->ctx.errors.iid >= 0 &&
appctx->ctx.errors.px->uuid != appctx->ctx.errors.iid &&
es->oe->uuid != appctx->ctx.errors.iid)
goto next;
if (appctx->ctx.errors.ptr < 0) {
/* just print headers now */
char pn[INET6_ADDRSTRLEN];
struct tm tm;
int port;
get_localtime(es->when.tv_sec, &tm);
chunk_appendf(&trash, " \n[%02d/%s/%04d:%02d:%02d:%02d.%03d]",
tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
tm.tm_hour, tm.tm_min, tm.tm_sec, (int)(es->when.tv_usec/1000));
switch (addr_to_str(&es->src, pn, sizeof(pn))) {
case AF_INET:
case AF_INET6:
port = get_host_port(&es->src);
break;
default:
port = 0;
}
switch (appctx->ctx.errors.flag & 1) {
case 0:
chunk_appendf(&trash,
" frontend %s (#%d): invalid request\n"
" backend %s (#%d)",
appctx->ctx.errors.px->id, appctx->ctx.errors.px->uuid,
(es->oe->cap & PR_CAP_BE) ? es->oe->id : "<NONE>",
(es->oe->cap & PR_CAP_BE) ? es->oe->uuid : -1);
break;
case 1:
chunk_appendf(&trash,
" backend %s (#%d): invalid response\n"
" frontend %s (#%d)",
appctx->ctx.errors.px->id, appctx->ctx.errors.px->uuid,
es->oe->id, es->oe->uuid);
break;
}
chunk_appendf(&trash,
", server %s (#%d), event #%u, src %s:%d\n"
" buffer starts at %llu (including %u out), %u free,\n"
" len %u, wraps at %u, error at position %u\n",
es->srv ? es->srv->id : "<NONE>",
es->srv ? es->srv->puid : -1,
es->ev_id, pn, port,
es->buf_ofs, es->buf_out,
global.tune.bufsize - es->buf_out - es->buf_len,
es->buf_len, es->buf_wrap, es->buf_err);
if (es->show)
es->show(&trash, es);
chunk_appendf(&trash, " \n");
if (ci_putchk(si_ic(si), &trash) == -1)
goto cant_send_unlock;
appctx->ctx.errors.ptr = 0;
appctx->ctx.errors.ev_id = es->ev_id;
}
if (appctx->ctx.errors.ev_id != es->ev_id) {
/* the snapshot changed while we were dumping it */
chunk_appendf(&trash,
" WARNING! update detected on this snapshot, dump interrupted. Please re-check!\n");
if (ci_putchk(si_ic(si), &trash) == -1)
goto cant_send_unlock;
goto next;
}
/* OK, ptr >= 0, so we have to dump the current line */
while (appctx->ctx.errors.ptr < es->buf_len && appctx->ctx.errors.ptr < global.tune.bufsize) {
int newptr;
int newline;
newline = appctx->ctx.errors.bol;
newptr = dump_text_line(&trash, es->buf, global.tune.bufsize, es->buf_len, &newline, appctx->ctx.errors.ptr);
if (newptr == appctx->ctx.errors.ptr)
goto cant_send_unlock;
if (ci_putchk(si_ic(si), &trash) == -1)
goto cant_send_unlock;
appctx->ctx.errors.ptr = newptr;
appctx->ctx.errors.bol = newline;
};
next:
HA_SPIN_UNLOCK(PROXY_LOCK, &appctx->ctx.errors.px->lock);
appctx->ctx.errors.bol = 0;
appctx->ctx.errors.ptr = -1;
appctx->ctx.errors.flag ^= 1;
if (!(appctx->ctx.errors.flag & 1))
appctx->ctx.errors.px = appctx->ctx.errors.px->next;
}
/* dump complete */
return 1;
cant_send_unlock:
HA_SPIN_UNLOCK(PROXY_LOCK, &appctx->ctx.errors.px->lock);
cant_send:
si_rx_room_blk(si);
return 0;
}
/* register cli keywords */
static struct cli_kw_list cli_kws = {{ },{
{ { "disable", "frontend", NULL }, "disable frontend : temporarily disable specific frontend", cli_parse_disable_frontend, NULL, NULL },
{ { "enable", "frontend", NULL }, "enable frontend : re-enable specific frontend", cli_parse_enable_frontend, NULL, NULL },
{ { "set", "maxconn", "frontend", NULL }, "set maxconn frontend : change a frontend's maxconn setting", cli_parse_set_maxconn_frontend, NULL },
{ { "show","servers", "state", NULL }, "show servers state [id]: dump volatile server information (for backend <id>)", cli_parse_show_servers, cli_io_handler_servers_state },
{ { "show", "backend", NULL }, "show backend : list backends in the current running config", NULL, cli_io_handler_show_backend },
{ { "shutdown", "frontend", NULL }, "shutdown frontend : stop a specific frontend", cli_parse_shutdown_frontend, NULL, NULL },
{ { "set", "dynamic-cookie-key", "backend", NULL }, "set dynamic-cookie-key backend : change a backend secret key for dynamic cookies", cli_parse_set_dyncookie_key_backend, NULL },
{ { "enable", "dynamic-cookie", "backend", NULL }, "enable dynamic-cookie backend : enable dynamic cookies on a specific backend", cli_parse_enable_dyncookie_backend, NULL },
{ { "disable", "dynamic-cookie", "backend", NULL }, "disable dynamic-cookie backend : disable dynamic cookies on a specific backend", cli_parse_disable_dyncookie_backend, NULL },
{ { "show", "errors", NULL }, "show errors : report last request and response errors for each proxy", cli_parse_show_errors, cli_io_handler_show_errors, NULL },
{{},}
}};
INITCALL1(STG_REGISTER, cli_register_kw, &cli_kws);
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/