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/*
** Zabbix
** Copyright (C) 2001-2022 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 "zbxsysinfo.h"
#include "../sysinfo.h"
#include "log.h"
#ifdef HAVE_LIBPERFSTAT
static perfstat_memory_total_t m;
#define ZBX_PERFSTAT_PAGE_SHIFT 12 /* 4 KB */
#define ZBX_PERFSTAT_MEMORY_TOTAL() \
\
if (-1 == perfstat_memory_total(NULL, &m, sizeof(m), 1)) \
{ \
SET_MSG_RESULT(result, zbx_dsprintf(NULL, "Cannot obtain system information: %s", \
zbx_strerror(errno))); \
return SYSINFO_RET_FAIL; \
}
static int vm_memory_total(AGENT_RESULT *result)
{
ZBX_PERFSTAT_MEMORY_TOTAL();
/* total real memory in pages */
SET_UI64_RESULT(result, m.real_total << ZBX_PERFSTAT_PAGE_SHIFT);
return SYSINFO_RET_OK;
}
static int vm_memory_pinned(AGENT_RESULT *result)
{
ZBX_PERFSTAT_MEMORY_TOTAL();
/* real memory which is pinned in pages */
SET_UI64_RESULT(result, m.real_pinned << ZBX_PERFSTAT_PAGE_SHIFT);
return SYSINFO_RET_OK;
}
static int vm_memory_free(AGENT_RESULT *result)
{
ZBX_PERFSTAT_MEMORY_TOTAL();
/* free real memory in pages */
SET_UI64_RESULT(result, m.real_free << ZBX_PERFSTAT_PAGE_SHIFT);
return SYSINFO_RET_OK;
}
static int vm_memory_used(AGENT_RESULT *result)
{
ZBX_PERFSTAT_MEMORY_TOTAL();
/* real memory which is in use in pages */
SET_UI64_RESULT(result, m.real_inuse << ZBX_PERFSTAT_PAGE_SHIFT);
return SYSINFO_RET_OK;
}
static int vm_memory_pused(AGENT_RESULT *result)
{
ZBX_PERFSTAT_MEMORY_TOTAL();
if (0 == m.real_total)
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot calculate percentage because total is zero."));
return SYSINFO_RET_FAIL;
}
SET_DBL_RESULT(result, m.real_inuse / (double)m.real_total * 100);
return SYSINFO_RET_OK;
}
static int vm_memory_available(AGENT_RESULT *result)
{
ZBX_PERFSTAT_MEMORY_TOTAL();
SET_UI64_RESULT(result, (m.real_free + m.numperm) << ZBX_PERFSTAT_PAGE_SHIFT);
return SYSINFO_RET_OK;
}
static int vm_memory_pavailable(AGENT_RESULT *result)
{
ZBX_PERFSTAT_MEMORY_TOTAL();
if (0 == m.real_total)
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot calculate percentage because total is zero."));
return SYSINFO_RET_FAIL;
}
SET_DBL_RESULT(result, (m.real_free + m.numperm) / (double)m.real_total * 100);
return SYSINFO_RET_OK;
}
static int vm_memory_cached(AGENT_RESULT *result)
{
ZBX_PERFSTAT_MEMORY_TOTAL();
SET_UI64_RESULT(result, m.numperm << ZBX_PERFSTAT_PAGE_SHIFT); /* number of pages used for files */
return SYSINFO_RET_OK;
}
#endif
int vm_memory_size(AGENT_REQUEST *request, AGENT_RESULT *result)
{
#ifdef HAVE_LIBPERFSTAT
int ret;
char *mode;
if (1 < request->nparam)
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Too many parameters."));
return SYSINFO_RET_FAIL;
}
mode = get_rparam(request, 0);
if (NULL == mode || '\0' == *mode || 0 == strcmp(mode, "total"))
ret = vm_memory_total(result);
else if (0 == strcmp(mode, "pinned"))
ret = vm_memory_pinned(result);
else if (0 == strcmp(mode, "free"))
ret = vm_memory_free(result);
else if (0 == strcmp(mode, "used"))
ret = vm_memory_used(result);
else if (0 == strcmp(mode, "pused"))
ret = vm_memory_pused(result);
else if (0 == strcmp(mode, "available"))
ret = vm_memory_available(result);
else if (0 == strcmp(mode, "pavailable"))
ret = vm_memory_pavailable(result);
else if (0 == strcmp(mode, "cached"))
ret = vm_memory_cached(result);
else
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid first parameter."));
return SYSINFO_RET_FAIL;
}
return ret;
#else
SET_MSG_RESULT(result, zbx_strdup(NULL, "Agent was compiled without support for Perfstat API."));
return SYSINFO_RET_FAIL;
#endif
}
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