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 "zbxcachehistory.h"

#include "zbxcachevalue.h"

​

#include "log.h"

#include "zbxmutexs.h"

#include "zbxserver.h"

#include "events.h"

#include "zbxmodules.h"

#include "module.h"

#include "zbxexport.h"

#include "zbxnix.h"

#include "zbxavailability.h"

#include "zbxconnector.h"

#include "zbxtrends.h"

#include "zbxnum.h"

#include "zbxsysinfo.h"

#include "zbx_host_constants.h"

#include "zbx_trigger_constants.h"

#include "zbx_item_constants.h"

#include "zbxpreproc.h"

#include "zbxtagfilter.h"

​

static zbx_shmem_info_t *hc_index_mem = NULL;

static zbx_shmem_info_t *hc_mem = NULL;

static zbx_shmem_info_t *trend_mem = NULL;

​

#define LOCK_CACHE  zbx_mutex_lock(cache_lock)

#define UNLOCK_CACHE    zbx_mutex_unlock(cache_lock)

#define LOCK_TRENDS zbx_mutex_lock(trends_lock)

#define UNLOCK_TRENDS   zbx_mutex_unlock(trends_lock)

#define LOCK_CACHE_IDS      zbx_mutex_lock(cache_ids_lock)

#define UNLOCK_CACHE_IDS    zbx_mutex_unlock(cache_ids_lock)

​

static zbx_mutex_t  cache_lock = ZBX_MUTEX_NULL;

static zbx_mutex_t  trends_lock = ZBX_MUTEX_NULL;

static zbx_mutex_t  cache_ids_lock = ZBX_MUTEX_NULL;

​

static char     *sql = NULL;

static size_t       sql_alloc = 4 * ZBX_KIBIBYTE;

​

extern unsigned char    program_type;

extern int      CONFIG_DOUBLE_PRECISION;

​

#define ZBX_IDS_SIZE    10

​

#define ZBX_HC_ITEMS_INIT_SIZE  1000

​

#define ZBX_TRENDS_CLEANUP_TIME (SEC_PER_MIN * 55)

​

/* the maximum time spent synchronizing history */

#define ZBX_HC_SYNC_TIME_MAX    10

​

/* the maximum number of items in one synchronization batch */

#define ZBX_HC_SYNC_MAX     1000

#define ZBX_HC_TIMER_MAX    (ZBX_HC_SYNC_MAX / 2)

#define ZBX_HC_TIMER_SOFT_MAX   (ZBX_HC_TIMER_MAX - 10)

​

/* the minimum processed item percentage of item candidates to continue synchronizing */

#define ZBX_HC_SYNC_MIN_PCNT    10

​

/* the maximum number of characters for history cache values */

#define ZBX_HISTORY_VALUE_LEN   (1024 * 64)

​

#define ZBX_DC_FLAGS_NOT_FOR_HISTORY    (ZBX_DC_FLAG_NOVALUE | ZBX_DC_FLAG_UNDEF | ZBX_DC_FLAG_NOHISTORY)

#define ZBX_DC_FLAGS_NOT_FOR_TRENDS (ZBX_DC_FLAG_NOVALUE | ZBX_DC_FLAG_UNDEF | ZBX_DC_FLAG_NOTRENDS)

#define ZBX_DC_FLAGS_NOT_FOR_MODULES    (ZBX_DC_FLAGS_NOT_FOR_HISTORY | ZBX_DC_FLAG_LLD)

#define ZBX_DC_FLAGS_NOT_FOR_EXPORT (ZBX_DC_FLAG_NOVALUE | ZBX_DC_FLAG_UNDEF)

​

#define ZBX_HC_PROXYQUEUE_STATE_NORMAL 0

#define ZBX_HC_PROXYQUEUE_STATE_WAIT 1

​

typedef struct