Zabbix

/*

** Zabbix

** Copyright (C) 2001-2023 Zabbix SIA

**

** 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.

**

** This program is distributed in the hope that it will be useful,

** but WITHOUT ANY WARRANTY; without even the implied warranty of

** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

** GNU General Public License for more details.

**

** You should have received a copy of the GNU General Public License

** along with this program; if not, write to the Free Software

** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

**/

​

#include "cpustat.h"

​

#include "zbxcommon.h"

#include "stats.h"

#ifdef _WINDOWS

#   include "perfstat.h"

/* defined in sysinfo lib */

extern int  get_cpu_group_num_win32(void);

extern int  get_numa_node_num_win32(void);

#endif

#include "zbxmutexs.h"

#include "log.h"

​

/* <sys/dkstat.h> removed in OpenBSD 5.7, only <sys/sched.h> with the same CP_* definitions remained */

#if defined(OpenBSD) && defined(HAVE_SYS_SCHED_H) && !defined(HAVE_SYS_DKSTAT_H)

#   include <sys/sched.h>

#endif

​

#if !defined(_WINDOWS)

#   define LOCK_CPUSTATS    zbx_mutex_lock(cpustats_lock)

#   define UNLOCK_CPUSTATS  zbx_mutex_unlock(cpustats_lock)

static zbx_mutex_t  cpustats_lock = ZBX_MUTEX_NULL;

#else

#   define LOCK_CPUSTATS

#   define UNLOCK_CPUSTATS

#endif

​

#ifdef HAVE_KSTAT_H

static kstat_ctl_t  *kc = NULL;

static kid_t        kc_id = 0;

static kstat_t      *(*ksp)[] = NULL;   /* array of pointers to "cpu_stat" elements in kstat chain */

​

static int  refresh_kstat(ZBX_CPUS_STAT_DATA *pcpus)

{

    static int  cpu_over_count_prev = 0;

    int     cpu_over_count = 0, i, inserted;

    kid_t       id;

    kstat_t     *k;

​

    zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);

​

    for (i = 0; i < pcpus->count; i++)

        (*ksp)[i] = NULL;

​

    /* kstat_chain_update() can return:                         */

    /*   - -1 (error),                                  */

    /*   -  a new kstat chain ID (chain successfully updated),              */

    /*   -  0 (kstat chain was up-to-date). We ignore this case to make refresh_kstat() */

    /*        usable for first-time initialization as the kstat chain is up-to-date after   */

    /*        kstat_open().                                 */

    if (-1 == (id = kstat_chain_update(kc)))

    {

        zabbix_log(LOG_LEVEL_ERR, "%s: kstat_chain_update() failed", __func__);

        return FAIL;

    }

​

    if (0 != id)

        kc_id = id;

​

    for (k = kc->kc_chain; NULL != k; k = k->ks_next)   /* traverse all kstat chain */

    {

        if (0 == strcmp("cpu_stat", k->ks_module))

        {

            inserted = 0;

            for (i = 1; i <= pcpus->count; i++) /* search in our array of ZBX_SINGLE_CPU_STAT_DATAs */

            {

                if (pcpus->cpu[i].cpu_num == k->ks_instance)    /* CPU instance found */

                {

                    (*ksp)[i - 1] = k;

                    inserted = 1;

​

                    break;