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haproxy/src/cfgparse-global.c
Willy Tarreau beb859abce MINOR: polling: add an option to support busy polling 
In some situations, especially when dealing with low latency on processors
supporting a variable frequency or when running inside virtual machines,
each time the process waits for an I/O using the poller, the processor
goes back to sleep or is offered to another VM for a long time, and it
causes excessively high latencies.

A solution to this provided by this patch is to enable busy polling using
a global option. When busy polling is enabled, the pollers never sleep and
loop over themselves waiting for an I/O event to happen or for a timeout
to occur. On multi-processor machines it can significantly overheat the
processor but it usually results in much lower latencies.

A typical test consisting in injecting traffic over a single connection at
a time over the loopback shows a bump from 4640 to 8540 connections per
second on forwarded connections, indicating a latency reduction of 98
microseconds for each connection, and a bump from 12500 to 21250 for
locally terminated connections (redirects), indicating a reduction of
33 microseconds.

It is only usable with epoll and kqueue because select() and poll()'s
API is not convenient for such usages, and the level of performance they
are used in doesn't benefit from this anyway.

The option, which obviously remains disabled by default, can be turned
on using "busy-polling" in the global section, and turned off later
using "no busy-polling". Its status is reported in "show info" to help
troubleshooting suspicious CPU spikes.
2018-11-22 19:47:30 +01:00

1132 lines
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>
#include <ctype.h>
#include <pwd.h>
#include <grp.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <common/cfgparse.h>
#include <proto/compression.h>
/*
* parse a line in a <global> section. Returns the error code, 0 if OK, or
* any combination of :
* - ERR_ABORT: must abort ASAP
* - ERR_FATAL: we can continue parsing but not start the service
* - ERR_WARN: a warning has been emitted
* - ERR_ALERT: an alert has been emitted
* Only the two first ones can stop processing, the two others are just
* indicators.
*/
int cfg_parse_global(const char *file, int linenum, char **args, int kwm)
{
int err_code = 0;
char *errmsg = NULL;
if (!strcmp(args[0], "global")) { /* new section */
/* no option, nothing special to do */
alertif_too_many_args(0, file, linenum, args, &err_code);
goto out;
}
else if (!strcmp(args[0], "daemon")) {
if (alertif_too_many_args(0, file, linenum, args, &err_code))
goto out;
global.mode |= MODE_DAEMON;
}
else if (!strcmp(args[0], "master-worker")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*args[1]) {
if (!strcmp(args[1], "no-exit-on-failure")) {
global.tune.options |= GTUNE_NOEXIT_ONFAILURE;
} else {
ha_alert("parsing [%s:%d] : '%s' only supports 'no-exit-on-failure' option.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
global.mode |= MODE_MWORKER;
}
else if (!strcmp(args[0], "debug")) {
if (alertif_too_many_args(0, file, linenum, args, &err_code))
goto out;
global.mode |= MODE_DEBUG;
}
else if (!strcmp(args[0], "noepoll")) {
if (alertif_too_many_args(0, file, linenum, args, &err_code))
goto out;
global.tune.options &= ~GTUNE_USE_EPOLL;
}
else if (!strcmp(args[0], "nokqueue")) {
if (alertif_too_many_args(0, file, linenum, args, &err_code))
goto out;
global.tune.options &= ~GTUNE_USE_KQUEUE;
}
else if (!strcmp(args[0], "nopoll")) {
if (alertif_too_many_args(0, file, linenum, args, &err_code))
goto out;
global.tune.options &= ~GTUNE_USE_POLL;
}
else if (!strcmp(args[0], "busy-polling")) { /* "no busy-polling" or "busy-polling" */
if (alertif_too_many_args(0, file, linenum, args, &err_code))
goto out;
if (kwm == KWM_NO)
global.tune.options &= ~GTUNE_BUSY_POLLING;
else
global.tune.options |= GTUNE_BUSY_POLLING;
}
else if (!strcmp(args[0], "nosplice")) {
if (alertif_too_many_args(0, file, linenum, args, &err_code))
goto out;
global.tune.options &= ~GTUNE_USE_SPLICE;
}
else if (!strcmp(args[0], "nogetaddrinfo")) {
if (alertif_too_many_args(0, file, linenum, args, &err_code))
goto out;
global.tune.options &= ~GTUNE_USE_GAI;
}
else if (!strcmp(args[0], "noreuseport")) {
if (alertif_too_many_args(0, file, linenum, args, &err_code))
goto out;
global.tune.options &= ~GTUNE_USE_REUSEPORT;
}
else if (!strcmp(args[0], "quiet")) {
if (alertif_too_many_args(0, file, linenum, args, &err_code))
goto out;
global.mode |= MODE_QUIET;
}
else if (!strcmp(args[0], "tune.runqueue-depth")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.tune.runqueue_depth != 0) {
ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
err_code |= ERR_ALERT;
goto out;
}
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.tune.runqueue_depth = atol(args[1]);
}
else if (!strcmp(args[0], "tune.maxpollevents")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.tune.maxpollevents != 0) {
ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
err_code |= ERR_ALERT;
goto out;
}
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.tune.maxpollevents = atol(args[1]);
}
else if (!strcmp(args[0], "tune.maxaccept")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.tune.maxaccept != 0) {
ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
err_code |= ERR_ALERT;
goto out;
}
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.tune.maxaccept = atol(args[1]);
}
else if (!strcmp(args[0], "tune.chksize")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.tune.chksize = atol(args[1]);
}
else if (!strcmp(args[0], "tune.recv_enough")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.tune.recv_enough = atol(args[1]);
}
else if (!strcmp(args[0], "tune.buffers.limit")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.tune.buf_limit = atol(args[1]);
if (global.tune.buf_limit) {
if (global.tune.buf_limit < 3)
global.tune.buf_limit = 3;
if (global.tune.buf_limit <= global.tune.reserved_bufs)
global.tune.buf_limit = global.tune.reserved_bufs + 1;
}
}
else if (!strcmp(args[0], "tune.buffers.reserve")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.tune.reserved_bufs = atol(args[1]);
if (global.tune.reserved_bufs < 2)
global.tune.reserved_bufs = 2;
if (global.tune.buf_limit && global.tune.buf_limit <= global.tune.reserved_bufs)
global.tune.buf_limit = global.tune.reserved_bufs + 1;
}
else if (!strcmp(args[0], "tune.bufsize")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.tune.bufsize = atol(args[1]);
if (global.tune.bufsize <= 0) {
ha_alert("parsing [%s:%d] : '%s' expects a positive integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
else if (!strcmp(args[0], "tune.maxrewrite")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.tune.maxrewrite = atol(args[1]);
if (global.tune.maxrewrite < 0) {
ha_alert("parsing [%s:%d] : '%s' expects a positive integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
else if (!strcmp(args[0], "tune.idletimer")) {
unsigned int idle;
const char *res;
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects a timer value between 0 and 65535 ms.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
res = parse_time_err(args[1], &idle, TIME_UNIT_MS);
if (res) {
ha_alert("parsing [%s:%d]: unexpected character '%c' in argument to <%s>.\n",
file, linenum, *res, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (idle > 65535) {
ha_alert("parsing [%s:%d] : '%s' expects a timer value between 0 and 65535 ms.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.tune.idle_timer = idle;
}
else if (!strcmp(args[0], "tune.rcvbuf.client")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.tune.client_rcvbuf != 0) {
ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
err_code |= ERR_ALERT;
goto out;
}
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.tune.client_rcvbuf = atol(args[1]);
}
else if (!strcmp(args[0], "tune.rcvbuf.server")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.tune.server_rcvbuf != 0) {
ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
err_code |= ERR_ALERT;
goto out;
}
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.tune.server_rcvbuf = atol(args[1]);
}
else if (!strcmp(args[0], "tune.sndbuf.client")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.tune.client_sndbuf != 0) {
ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
err_code |= ERR_ALERT;
goto out;
}
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.tune.client_sndbuf = atol(args[1]);
}
else if (!strcmp(args[0], "tune.sndbuf.server")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.tune.server_sndbuf != 0) {
ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
err_code |= ERR_ALERT;
goto out;
}
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.tune.server_sndbuf = atol(args[1]);
}
else if (!strcmp(args[0], "tune.pipesize")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.tune.pipesize = atol(args[1]);
}
else if (!strcmp(args[0], "tune.http.cookielen")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.tune.cookie_len = atol(args[1]) + 1;
}
else if (!strcmp(args[0], "tune.http.logurilen")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.tune.requri_len = atol(args[1]) + 1;
}
else if (!strcmp(args[0], "tune.http.maxhdr")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.tune.max_http_hdr = atoi(args[1]);
if (global.tune.max_http_hdr < 1 || global.tune.max_http_hdr > 32767) {
ha_alert("parsing [%s:%d] : '%s' expects a numeric value between 1 and 32767\n",
file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
else if (!strcmp(args[0], "tune.comp.maxlevel")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*args[1]) {
global.tune.comp_maxlevel = atoi(args[1]);
if (global.tune.comp_maxlevel < 1 || global.tune.comp_maxlevel > 9) {
ha_alert("parsing [%s:%d] : '%s' expects a numeric value between 1 and 9\n",
file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
} else {
ha_alert("parsing [%s:%d] : '%s' expects a numeric value between 1 and 9\n",
file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
else if (!strcmp(args[0], "tune.pattern.cache-size")) {
if (*args[1]) {
global.tune.pattern_cache = atoi(args[1]);
if (global.tune.pattern_cache < 0) {
ha_alert("parsing [%s:%d] : '%s' expects a positive numeric value\n",
file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
} else {
ha_alert("parsing [%s:%d] : '%s' expects a positive numeric value\n",
file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
else if (!strcmp(args[0], "uid")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.uid != 0) {
ha_alert("parsing [%s:%d] : user/uid already specified. Continuing.\n", file, linenum);
err_code |= ERR_ALERT;
goto out;
}
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (strl2irc(args[1], strlen(args[1]), &global.uid) != 0) {
ha_warning("parsing [%s:%d] : uid: string '%s' is not a number.\n | You might want to use the 'user' parameter to use a system user name.\n", file, linenum, args[1]);
err_code |= ERR_WARN;
goto out;
}
}
else if (!strcmp(args[0], "gid")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.gid != 0) {
ha_alert("parsing [%s:%d] : group/gid already specified. Continuing.\n", file, linenum);
err_code |= ERR_ALERT;
goto out;
}
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (strl2irc(args[1], strlen(args[1]), &global.gid) != 0) {
ha_warning("parsing [%s:%d] : gid: string '%s' is not a number.\n | You might want to use the 'group' parameter to use a system group name.\n", file, linenum, args[1]);
err_code |= ERR_WARN;
goto out;
}
}
else if (!strcmp(args[0], "external-check")) {
if (alertif_too_many_args(0, file, linenum, args, &err_code))
goto out;
global.external_check = 1;
}
/* user/group name handling */
else if (!strcmp(args[0], "user")) {
struct passwd *ha_user;
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.uid != 0) {
ha_alert("parsing [%s:%d] : user/uid already specified. Continuing.\n", file, linenum);
err_code |= ERR_ALERT;
goto out;
}
errno = 0;
ha_user = getpwnam(args[1]);
if (ha_user != NULL) {
global.uid = (int)ha_user->pw_uid;
}
else {
ha_alert("parsing [%s:%d] : cannot find user id for '%s' (%d:%s)\n", file, linenum, args[1], errno, strerror(errno));
err_code |= ERR_ALERT | ERR_FATAL;
}
}
else if (!strcmp(args[0], "group")) {
struct group *ha_group;
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.gid != 0) {
ha_alert("parsing [%s:%d] : gid/group was already specified. Continuing.\n", file, linenum);
err_code |= ERR_ALERT;
goto out;
}
errno = 0;
ha_group = getgrnam(args[1]);
if (ha_group != NULL) {
global.gid = (int)ha_group->gr_gid;
}
else {
ha_alert("parsing [%s:%d] : cannot find group id for '%s' (%d:%s)\n", file, linenum, args[1], errno, strerror(errno));
err_code |= ERR_ALERT | ERR_FATAL;
}
}
/* end of user/group name handling*/
else if (!strcmp(args[0], "nbproc")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.nbproc = atol(args[1]);
if (global.nbproc < 1 || global.nbproc > LONGBITS) {
ha_alert("parsing [%s:%d] : '%s' must be between 1 and %d (was %d).\n",
file, linenum, args[0], LONGBITS, global.nbproc);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
else if (!strcmp(args[0], "nbthread")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.nbthread = parse_nbthread(args[1], &errmsg);
if (!global.nbthread) {
ha_alert("parsing [%s:%d] : '%s' %s.\n",
file, linenum, args[0], errmsg);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
else if (!strcmp(args[0], "maxconn")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.maxconn != 0) {
ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
err_code |= ERR_ALERT;
goto out;
}
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.maxconn = atol(args[1]);
#ifdef SYSTEM_MAXCONN
if (global.maxconn > DEFAULT_MAXCONN && cfg_maxconn <= DEFAULT_MAXCONN) {
ha_alert("parsing [%s:%d] : maxconn value %d too high for this system.\nLimiting to %d. Please use '-n' to force the value.\n", file, linenum, global.maxconn, DEFAULT_MAXCONN);
global.maxconn = DEFAULT_MAXCONN;
err_code |= ERR_ALERT;
}
#endif /* SYSTEM_MAXCONN */
}
else if (!strcmp(args[0], "ssl-server-verify")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (strcmp(args[1],"none") == 0)
global.ssl_server_verify = SSL_SERVER_VERIFY_NONE;
else if (strcmp(args[1],"required") == 0)
global.ssl_server_verify = SSL_SERVER_VERIFY_REQUIRED;
else {
ha_alert("parsing [%s:%d] : '%s' expects 'none' or 'required' as argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
else if (!strcmp(args[0], "maxconnrate")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.cps_lim != 0) {
ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
err_code |= ERR_ALERT;
goto out;
}
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.cps_lim = atol(args[1]);
}
else if (!strcmp(args[0], "maxsessrate")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.sps_lim != 0) {
ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
err_code |= ERR_ALERT;
goto out;
}
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.sps_lim = atol(args[1]);
}
else if (!strcmp(args[0], "maxsslrate")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.ssl_lim != 0) {
ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
err_code |= ERR_ALERT;
goto out;
}
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.ssl_lim = atol(args[1]);
}
else if (!strcmp(args[0], "maxcomprate")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument in kb/s.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.comp_rate_lim = atoi(args[1]) * 1024;
}
else if (!strcmp(args[0], "maxpipes")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.maxpipes != 0) {
ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
err_code |= ERR_ALERT;
goto out;
}
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.maxpipes = atol(args[1]);
}
else if (!strcmp(args[0], "maxzlibmem")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.maxzlibmem = atol(args[1]) * 1024L * 1024L;
}
else if (!strcmp(args[0], "maxcompcpuusage")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument between 0 and 100.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
compress_min_idle = 100 - atoi(args[1]);
if (compress_min_idle > 100) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument between 0 and 100.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
else if (!strcmp(args[0], "ulimit-n")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.rlimit_nofile != 0) {
ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
err_code |= ERR_ALERT;
goto out;
}
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects an integer argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.rlimit_nofile = atol(args[1]);
}
else if (!strcmp(args[0], "chroot")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.chroot != NULL) {
ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
err_code |= ERR_ALERT;
goto out;
}
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects a directory as an argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.chroot = strdup(args[1]);
}
else if (!strcmp(args[0], "description")) {
int i, len=0;
char *d;
if (!*args[1]) {
ha_alert("parsing [%s:%d]: '%s' expects a string argument.\n",
file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
for (i = 1; *args[i]; i++)
len += strlen(args[i]) + 1;
if (global.desc)
free(global.desc);
global.desc = d = calloc(1, len);
d += snprintf(d, global.desc + len - d, "%s", args[1]);
for (i = 2; *args[i]; i++)
d += snprintf(d, global.desc + len - d, " %s", args[i]);
}
else if (!strcmp(args[0], "node")) {
int i;
char c;
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
for (i=0; args[1][i]; i++) {
c = args[1][i];
if (!isupper((unsigned char)c) && !islower((unsigned char)c) &&
!isdigit((unsigned char)c) && c != '_' && c != '-' && c != '.')
break;
}
if (!i || args[1][i]) {
ha_alert("parsing [%s:%d]: '%s' requires valid node name - non-empty string"
" with digits(0-9), letters(A-Z, a-z), dot(.), hyphen(-) or underscode(_).\n",
file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (global.node)
free(global.node);
global.node = strdup(args[1]);
}
else if (!strcmp(args[0], "pidfile")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.pidfile != NULL) {
ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
err_code |= ERR_ALERT;
goto out;
}
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects a file name as an argument.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.pidfile = strdup(args[1]);
}
else if (!strcmp(args[0], "unix-bind")) {
int cur_arg = 1;
while (*(args[cur_arg])) {
if (!strcmp(args[cur_arg], "prefix")) {
if (global.unix_bind.prefix != NULL) {
ha_alert("parsing [%s:%d] : unix-bind '%s' already specified. Continuing.\n", file, linenum, args[cur_arg]);
err_code |= ERR_ALERT;
cur_arg += 2;
continue;
}
if (*(args[cur_arg+1]) == 0) {
ha_alert("parsing [%s:%d] : unix_bind '%s' expects a path as an argument.\n", file, linenum, args[cur_arg]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.unix_bind.prefix = strdup(args[cur_arg+1]);
cur_arg += 2;
continue;
}
if (!strcmp(args[cur_arg], "mode")) {
global.unix_bind.ux.mode = strtol(args[cur_arg + 1], NULL, 8);
cur_arg += 2;
continue;
}
if (!strcmp(args[cur_arg], "uid")) {
global.unix_bind.ux.uid = atol(args[cur_arg + 1 ]);
cur_arg += 2;
continue;
}
if (!strcmp(args[cur_arg], "gid")) {
global.unix_bind.ux.gid = atol(args[cur_arg + 1 ]);
cur_arg += 2;
continue;
}
if (!strcmp(args[cur_arg], "user")) {
struct passwd *user;
user = getpwnam(args[cur_arg + 1]);
if (!user) {
ha_alert("parsing [%s:%d] : '%s' : '%s' unknown user.\n",
file, linenum, args[0], args[cur_arg + 1 ]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.unix_bind.ux.uid = user->pw_uid;
cur_arg += 2;
continue;
}
if (!strcmp(args[cur_arg], "group")) {
struct group *group;
group = getgrnam(args[cur_arg + 1]);
if (!group) {
ha_alert("parsing [%s:%d] : '%s' : '%s' unknown group.\n",
file, linenum, args[0], args[cur_arg + 1 ]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.unix_bind.ux.gid = group->gr_gid;
cur_arg += 2;
continue;
}
ha_alert("parsing [%s:%d] : '%s' only supports the 'prefix', 'mode', 'uid', 'gid', 'user' and 'group' options.\n",
file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
else if (!strcmp(args[0], "log")) { /* "no log" or "log ..." */
if (!parse_logsrv(args, &global.logsrvs, (kwm == KWM_NO), &errmsg)) {
ha_alert("parsing [%s:%d] : %s : %s\n", file, linenum, args[0], errmsg);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
else if (!strcmp(args[0], "log-send-hostname")) { /* set the hostname in syslog header */
char *name;
if (global.log_send_hostname != NULL) {
ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
err_code |= ERR_ALERT;
goto out;
}
if (*(args[1]))
name = args[1];
else
name = hostname;
free(global.log_send_hostname);
global.log_send_hostname = strdup(name);
}
else if (!strcmp(args[0], "server-state-base")) { /* path base where HAProxy can find server state files */
if (global.server_state_base != NULL) {
ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
err_code |= ERR_ALERT;
goto out;
}
if (!*(args[1])) {
ha_alert("parsing [%s:%d] : '%s' expects one argument: a directory path.\n", file, linenum, args[0]);
err_code |= ERR_FATAL;
goto out;
}
global.server_state_base = strdup(args[1]);
}
else if (!strcmp(args[0], "server-state-file")) { /* path to the file where HAProxy can load the server states */
if (global.server_state_file != NULL) {
ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
err_code |= ERR_ALERT;
goto out;
}
if (!*(args[1])) {
ha_alert("parsing [%s:%d] : '%s' expect one argument: a file path.\n", file, linenum, args[0]);
err_code |= ERR_FATAL;
goto out;
}
global.server_state_file = strdup(args[1]);
}
else if (!strcmp(args[0], "log-tag")) { /* tag to report to syslog */
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d] : '%s' expects a tag for use in syslog.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
chunk_destroy(&global.log_tag);
chunk_initstr(&global.log_tag, strdup(args[1]));
}
else if (!strcmp(args[0], "spread-checks")) { /* random time between checks (0-50) */
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (global.spread_checks != 0) {
ha_alert("parsing [%s:%d]: spread-checks already specified. Continuing.\n", file, linenum);
err_code |= ERR_ALERT;
goto out;
}
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d]: '%s' expects an integer argument (0..50).\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
global.spread_checks = atol(args[1]);
if (global.spread_checks < 0 || global.spread_checks > 50) {
ha_alert("parsing [%s:%d]: 'spread-checks' needs a positive value in range 0..50.\n", file, linenum);
err_code |= ERR_ALERT | ERR_FATAL;
}
}
else if (!strcmp(args[0], "max-spread-checks")) { /* maximum time between first and last check */
const char *err;
unsigned int val;
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d]: '%s' expects an integer argument (0..50).\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
err = parse_time_err(args[1], &val, TIME_UNIT_MS);
if (err) {
ha_alert("parsing [%s:%d]: unsupported character '%c' in '%s' (wants an integer delay).\n", file, linenum, *err, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
}
global.max_spread_checks = val;
if (global.max_spread_checks < 0) {
ha_alert("parsing [%s:%d]: '%s' needs a positive delay in milliseconds.\n",file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
}
}
else if (strcmp(args[0], "cpu-map") == 0) {
/* map a process list to a CPU set */
#ifdef USE_CPU_AFFINITY
char *slash;
unsigned long proc = 0, thread = 0, cpus;
int i, j, n, autoinc;
if (!*args[1] || !*args[2]) {
ha_alert("parsing [%s:%d] : %s expects a process number "
" ('all', 'odd', 'even', a number from 1 to %d or a range), "
" followed by a list of CPU ranges with numbers from 0 to %d.\n",
file, linenum, args[0], LONGBITS, LONGBITS - 1);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if ((slash = strchr(args[1], '/')) != NULL)
*slash = 0;
if (parse_process_number(args[1], &proc, &autoinc, &errmsg)) {
ha_alert("parsing [%s:%d] : %s : %s\n", file, linenum, args[0], errmsg);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (slash) {
if (parse_process_number(slash+1, &thread, NULL, &errmsg)) {
ha_alert("parsing [%s:%d] : %s : %s\n", file, linenum, args[0], errmsg);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
*slash = '/';
if (autoinc && atleast2(proc) && atleast2(thread)) {
ha_alert("parsing [%s:%d] : %s : '%s' : unable to automatically bind "
"a process range _AND_ a thread range\n",
file, linenum, args[0], args[1]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
if (parse_cpu_set((const char **)args+2, &cpus, &errmsg)) {
ha_alert("parsing [%s:%d] : %s : %s\n", file, linenum, args[0], errmsg);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (autoinc &&
my_popcountl(proc) != my_popcountl(cpus) &&
my_popcountl(thread) != my_popcountl(cpus)) {
ha_alert("parsing [%s:%d] : %s : PROC/THREAD range and CPU sets "
"must have the same size to be automatically bound\n",
file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
for (i = n = 0; i < LONGBITS; i++) {
/* No mapping for this process */
if (!(proc & (1UL << i)))
continue;
/* Mapping at the process level */
if (!thread) {
if (!autoinc)
global.cpu_map.proc[i] = cpus;
else {
n += my_ffsl(cpus >> n);
global.cpu_map.proc[i] = (1UL << (n-1));
}
continue;
}
/* Mapping at the thread level */
for (j = 0; j < MAX_THREADS; j++) {
/* Np mapping for this thread */
if (!(thread & (1UL << j)))
continue;
if (!autoinc)
global.cpu_map.thread[i][j] = cpus;
else {
n += my_ffsl(cpus >> n);
global.cpu_map.thread[i][j] = (1UL << (n-1));
}
}
}
#else
ha_alert("parsing [%s:%d] : '%s' is not enabled, please check build options for USE_CPU_AFFINITY.\n",
file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
#endif /* ! USE_CPU_AFFINITY */
}
else if (strcmp(args[0], "setenv") == 0 || strcmp(args[0], "presetenv") == 0) {
if (alertif_too_many_args(3, file, linenum, args, &err_code))
goto out;
if (*(args[2]) == 0) {
ha_alert("parsing [%s:%d]: '%s' expects a name and a value.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
/* "setenv" overwrites, "presetenv" only sets if not yet set */
if (setenv(args[1], args[2], (args[0][0] == 's')) != 0) {
ha_alert("parsing [%s:%d]: '%s' failed on variable '%s' : %s.\n", file, linenum, args[0], args[1], strerror(errno));
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
else if (!strcmp(args[0], "unsetenv")) {
int arg;
if (*(args[1]) == 0) {
ha_alert("parsing [%s:%d]: '%s' expects at least one variable name.\n", file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
for (arg = 1; *args[arg]; arg++) {
if (unsetenv(args[arg]) != 0) {
ha_alert("parsing [%s:%d]: '%s' failed on variable '%s' : %s.\n", file, linenum, args[0], args[arg], strerror(errno));
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
}
else if (!strcmp(args[0], "resetenv")) {
extern char **environ;
char **env = environ;
/* args contain variable names to keep, one per argument */
while (*env) {
int arg;
/* look for current variable in among all those we want to keep */
for (arg = 1; *args[arg]; arg++) {
if (strncmp(*env, args[arg], strlen(args[arg])) == 0 &&
(*env)[strlen(args[arg])] == '=')
break;
}
/* delete this variable */
if (!*args[arg]) {
char *delim = strchr(*env, '=');
if (!delim || delim - *env >= trash.size) {
ha_alert("parsing [%s:%d]: '%s' failed to unset invalid variable '%s'.\n", file, linenum, args[0], *env);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
memcpy(trash.area, *env, delim - *env);
trash.area[delim - *env] = 0;
if (unsetenv(trash.area) != 0) {
ha_alert("parsing [%s:%d]: '%s' failed to unset variable '%s' : %s.\n", file, linenum, args[0], *env, strerror(errno));
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
else
env++;
}
}
else {
struct cfg_kw_list *kwl;
int index;
int rc;
list_for_each_entry(kwl, &cfg_keywords.list, list) {
for (index = 0; kwl->kw[index].kw != NULL; index++) {
if (kwl->kw[index].section != CFG_GLOBAL)
continue;
if (strcmp(kwl->kw[index].kw, args[0]) == 0) {
rc = kwl->kw[index].parse(args, CFG_GLOBAL, NULL, NULL, file, linenum, &errmsg);
if (rc < 0) {
ha_alert("parsing [%s:%d] : %s\n", file, linenum, errmsg);
err_code |= ERR_ALERT | ERR_FATAL;
}
else if (rc > 0) {
ha_warning("parsing [%s:%d] : %s\n", file, linenum, errmsg);
err_code |= ERR_WARN;
goto out;
}
goto out;
}
}
}
ha_alert("parsing [%s:%d] : unknown keyword '%s' in '%s' section\n", file, linenum, args[0], "global");
err_code |= ERR_ALERT | ERR_FATAL;
}
out:
free(errmsg);
return err_code;
}
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