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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 "inodes.h"
#include "zbxsysinfo.h"
#include "../sysinfo.h"
#include "log.h"
int get_fs_inode_stat(const char *fs, zbx_uint64_t *itotal, zbx_uint64_t *ifree, zbx_uint64_t *iused, double *pfree,
double *pused, const char *mode, char **error)
{
#ifdef HAVE_SYS_STATVFS_H
# define ZBX_STATFS statvfs
# define ZBX_FFREE f_favail
#else
# define ZBX_STATFS statfs
# define ZBX_FFREE f_ffree
#endif
#define get_string(field) #field
#define validate(error, structure, field) \
\
do \
{ \
if (__UINT64_C(0xffffffffffffffff) == structure.field) \
{ \
error = zbx_strdup(NULL, "Cannot obtain filesystem information: value of " \
get_string(field) " is unknown."); \
return SYSINFO_RET_FAIL; \
} \
} \
while(0)
zbx_uint64_t total;
struct ZBX_STATFS s;
if (0 != ZBX_STATFS(fs, &s))
{
*error = zbx_dsprintf(NULL, "Cannot obtain filesystem information: %s", zbx_strerror(errno));
return SYSINFO_RET_FAIL;
}
validate(*error, s, f_files);
*itotal = (zbx_uint64_t)s.f_files;
validate(*error, s, ZBX_FFREE);
*ifree = (zbx_uint64_t)s.ZBX_FFREE;
validate(*error, s, f_ffree);
*iused = (zbx_uint64_t)(s.f_files - s.f_ffree);
total = s.f_files;
#ifdef HAVE_SYS_STATVFS_H
validate(*error, s, f_favail);
total -= s.f_ffree - s.f_favail;
#endif
if (0 != total)
{
*pfree = (100.0 * s.ZBX_FFREE) / total;
*pused = (100.0 * (total - s.ZBX_FFREE)) / total;
}
else if (NULL != mode && (0 == strcmp(mode, "pfree") || 0 == strcmp(mode, "pused")))
{
*error = zbx_strdup(NULL, "Cannot calculate percentage because total is zero.");
return SYSINFO_RET_FAIL;
}
return SYSINFO_RET_OK;
#undef ZBX_STATFS
#undef ZBX_FFREE
#undef validate
#undef get_string
}
static int vfs_fs_inode_local(AGENT_REQUEST *request, AGENT_RESULT *result)
{
char *fsname, *mode, *error;
zbx_uint64_t total, free, used;
double pfree, pused;
if (2 < request->nparam)
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Too many parameters."));
return SYSINFO_RET_FAIL;
}
fsname = get_rparam(request, 0);
mode = get_rparam(request, 1);
if (NULL == fsname || '\0' == *fsname)
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid first parameter."));
return SYSINFO_RET_FAIL;
}
if (SYSINFO_RET_OK != get_fs_inode_stat(fsname, &total, &free, &used, &pfree, &pused, mode, &error))
{
SET_MSG_RESULT(result, error);
return SYSINFO_RET_FAIL;
}
if (NULL == mode || '\0' == *mode || 0 == strcmp(mode, "total")) /* default parameter */
{
SET_UI64_RESULT(result, total);
}
else if (0 == strcmp(mode, "free"))
{
SET_UI64_RESULT(result, free);
}
else if (0 == strcmp(mode, "used"))
{
SET_UI64_RESULT(result, used);
}
else if (0 == strcmp(mode, "pfree"))
{
SET_DBL_RESULT(result, pfree);
}
else if (0 == strcmp(mode, "pused"))
{
SET_DBL_RESULT(result, pused);
}
else
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid second parameter."));
return SYSINFO_RET_FAIL;
}
return SYSINFO_RET_OK;
}
int vfs_fs_inode(AGENT_REQUEST *request, AGENT_RESULT *result)
{
return zbx_execute_threaded_metric(vfs_fs_inode_local, request, result);
}
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