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/*
** Zabbix
** Copyright (C) 2000-2011 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., 675 Mass Ave, Cambridge, MA 02139, USA.
**/
#include "common.h"
#include "stats.h"
#include "log.h"
#include "zbxconf.h"
#include "diskdevices.h"
#include "cfg.h"
#if defined(_WINDOWS)
# include "service.h"
#else
# include "daemon.h"
# include "ipc.h"
#endif
ZBX_COLLECTOR_DATA *collector = NULL;
#if !defined(_WINDOWS)
static int shm_id;
#endif
/******************************************************************************
* *
* Function: zbx_get_cpu_num *
* *
* Purpose: returns the number of processors which are currently online *
* (i.e., available). *
* *
* Return value: number of CPUs *
* *
* Author: Eugene Grigorjev *
* *
******************************************************************************/
static int zbx_get_cpu_num()
{
#if defined(_WINDOWS)
SYSTEM_INFO sysInfo;
GetSystemInfo(&sysInfo);
return (int)sysInfo.dwNumberOfProcessors;
#elif defined(HAVE_SYS_PSTAT_H)
struct pst_dynamic psd;
if (-1 == pstat_getdynamic(&psd, sizeof(struct pst_dynamic), 1, 0))
goto return_one;
return (int)psd.psd_proc_cnt;
#elif defined(_SC_NPROCESSORS_CONF)
/* FreeBSD 7.0 x86 */
/* Solaris 10 x86 */
int ncpu;
if (-1 == (ncpu = sysconf(_SC_NPROCESSORS_CONF)))
goto return_one;
return ncpu;
#elif defined(HAVE_FUNCTION_SYSCTL_HW_NCPU)
/* FreeBSD 6.2 x86; FreeBSD 7.0 x86 */
/* NetBSD 3.1 x86; NetBSD 4.0 x86 */
/* OpenBSD 4.2 x86 */
size_t len;
int mib[] = {CTL_HW, HW_NCPU}, ncpu;
len = sizeof(ncpu);
if (0 != sysctl(mib, 2, &ncpu, &len, NULL, 0))
goto return_one;
return ncpu;
#elif defined(HAVE_PROC_CPUINFO)
FILE *f = NULL;
int ncpu = 0;
if (NULL == (file = fopen("/proc/cpuinfo", "r")))
goto return_one;
while (NULL != fgets(line, 1024, file))
{
if (NULL == strstr(line, "processor"))
continue;
ncpu++;
}
zbx_fclose(file);
if (0 == ncpu)
goto return_one;
return ncpu;
#elif defined(HAVE_LIBPERFSTAT)
/* AIX 6.1 */
perfstat_cpu_total_t ps_cpu_total;
if (-1 == perfstat_cpu_total(NULL, &ps_cpu_total, sizeof(ps_cpu_total), 1))
goto return_one;
return (int)ps_cpu_total.ncpus;
#endif
#if !defined(_WINDOWS)
return_one:
zabbix_log(LOG_LEVEL_WARNING, "cannot determine number of CPUs, assuming 1");
return 1;
#endif
}
/******************************************************************************
* *
* Function: init_collector_data *
* *
* Purpose: Allocate memory for collector *
* *
* Author: Eugene Grigorjev *
* *
* Comments: Unix version allocates memory as shared. *
* *
******************************************************************************/
void init_collector_data()
{
int cpu_count;
size_t sz, sz_cpu;
#if !defined(_WINDOWS)
key_t shm_key;
#endif
cpu_count = zbx_get_cpu_num();
sz = sizeof(ZBX_COLLECTOR_DATA);
#ifdef _WINDOWS
sz_cpu = sizeof(PERF_COUNTER_DATA *) * (cpu_count + 1);
collector = zbx_malloc(collector, sz + sz_cpu);
memset(collector, 0, sz + sz_cpu);
collector->cpus.cpu_counter = (PERF_COUNTER_DATA **)(collector + 1);
collector->cpus.count = cpu_count;
init_perf_collector(&collector->perfs);
#else
sz_cpu = sizeof(ZBX_SINGLE_CPU_STAT_DATA) * (cpu_count + 1);
if (-1 == (shm_key = zbx_ftok(CONFIG_FILE, ZBX_IPC_COLLECTOR_ID)))
{
zabbix_log(LOG_LEVEL_CRIT, "cannot create IPC key for collector");
exit(FAIL);
}
if (-1 == (shm_id = zbx_shmget(shm_key, sz + sz_cpu)))
{
zabbix_log(LOG_LEVEL_CRIT, "cannot allocate shared memory for collector");
exit(FAIL);
}
if ((void *)(-1) == (collector = shmat(shm_id, NULL, 0)))
{
zabbix_log(LOG_LEVEL_CRIT, "cannot attach shared memory for collector: %s", zbx_strerror(errno));
exit(FAIL);
}
collector->cpus.cpu = (ZBX_SINGLE_CPU_STAT_DATA *)(collector + 1);
collector->cpus.count = cpu_count;
#endif /* _WINDOWS */
#ifdef _AIX
memset(&collector->vmstat, 0, sizeof(collector->vmstat));
#endif
}
/******************************************************************************
* *
* Function: free_collector_data *
* *
* Purpose: Free memory allocated for collector *
* *
* Author: Eugene Grigorjev *
* *
* Comments: Unix version allocated memory as shared. *
* *
******************************************************************************/
void free_collector_data()
{
#ifdef _WINDOWS
zbx_free(collector);
#else
if (NULL == collector)
return;
if (-1 == shmctl(shm_id, IPC_RMID, 0))
zabbix_log(LOG_LEVEL_WARNING, "cannot remove shared memory for collector: %s", zbx_strerror(errno));
#endif
collector = NULL;
}
/******************************************************************************
* *
* Function: collector_thread *
* *
* Purpose: Collect system information *
* *
* Author: Eugene Grigorjev *
* *
******************************************************************************/
ZBX_THREAD_ENTRY(collector_thread, args)
{
assert(args);
zabbix_log(LOG_LEVEL_WARNING, "agent #%d started [collector]", ((zbx_thread_args_t *)args)->thread_num);
zbx_free(args);
if (SUCCEED != init_cpu_collector(&(collector->cpus)))
free_cpu_collector(&(collector->cpus));
collector_diskdevice_add("");
while (ZBX_IS_RUNNING())
{
zbx_setproctitle("collector [processing data]");
#ifdef _WINDOWS
collect_perfstat();
#else
if (CPU_COLLECTOR_STARTED(collector))
collect_cpustat(&(collector->cpus));
#endif
collect_stats_diskdevices(&(collector->diskdevices));
#ifdef _AIX
if (1 == collector->vmstat.enabled)
collect_vmstat_data(&collector->vmstat);
#endif
zbx_setproctitle("collector [sleeping for 1 seconds]");
zbx_sleep(1);
}
if (CPU_COLLECTOR_STARTED(collector))
free_cpu_collector(&(collector->cpus));
#ifdef _WINDOWS
free_perf_collector(); /* cpu_collector must be freed before perf_collector is freed */
#endif
zabbix_log(LOG_LEVEL_INFORMATION, "zabbix_agentd collector stopped");
ZBX_DO_EXIT();
zbx_thread_exit(0);
}
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