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/*
** Zabbix
** Copyright (C) 2001-2014 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 "common.h"
#include "sysinfo.h"
#include "stats.h"
#include "diskdevices.h"
#define ZBX_DEV_PFX "/dev/"
#define ZBX_DEV_READ 0
#define ZBX_DEV_WRITE 1
#if defined(KERNEL_2_4)
# define INFO_FILE_NAME "/proc/partitions"
# define PARSE(line) if (sscanf(line, ZBX_FS_UI64 ZBX_FS_UI64 " %*d %s " \
ZBX_FS_UI64 " %*d " ZBX_FS_UI64 " %*d " \
ZBX_FS_UI64 " %*d " ZBX_FS_UI64 " %*d %*d %*d %*d", \
&rdev_major, \
&rdev_minor, \
name, \
&ds[ZBX_DSTAT_R_OPER], \
&ds[ZBX_DSTAT_R_SECT], \
&ds[ZBX_DSTAT_W_OPER], \
&ds[ZBX_DSTAT_W_SECT] \
) != 7) continue
#else
# define INFO_FILE_NAME "/proc/diskstats"
# define PARSE(line) if (sscanf(line, ZBX_FS_UI64 ZBX_FS_UI64 " %s " \
ZBX_FS_UI64 " %*d " ZBX_FS_UI64 " %*d " \
ZBX_FS_UI64 " %*d " ZBX_FS_UI64 " %*d %*d %*d %*d", \
&rdev_major, \
&rdev_minor, \
name, \
&ds[ZBX_DSTAT_R_OPER], \
&ds[ZBX_DSTAT_R_SECT], \
&ds[ZBX_DSTAT_W_OPER], \
&ds[ZBX_DSTAT_W_SECT] \
) != 7 \
&& \
/* some disk partitions */ \
sscanf(line, ZBX_FS_UI64 ZBX_FS_UI64 " %s " \
ZBX_FS_UI64 ZBX_FS_UI64 \
ZBX_FS_UI64 ZBX_FS_UI64, \
&rdev_major, \
&rdev_minor, \
name, \
&ds[ZBX_DSTAT_R_OPER], \
&ds[ZBX_DSTAT_R_SECT], \
&ds[ZBX_DSTAT_W_OPER], \
&ds[ZBX_DSTAT_W_SECT] \
) != 7 \
) continue
#endif
int get_diskstat(const char *devname, zbx_uint64_t *dstat)
{
FILE *f;
char tmp[MAX_STRING_LEN], name[MAX_STRING_LEN], dev_path[MAX_STRING_LEN];
int i, ret = FAIL, dev_exists = FAIL;
zbx_uint64_t ds[ZBX_DSTAT_MAX], rdev_major, rdev_minor;
zbx_stat_t dev_st;
int found = 0;
for (i = 0; i < ZBX_DSTAT_MAX; i++)
dstat[i] = (zbx_uint64_t)__UINT64_C(0);
if (NULL != devname && '\0' != *devname && 0 != strcmp(devname, "all"))
{
*dev_path = '\0';
if (0 != strncmp(devname, ZBX_DEV_PFX, sizeof(ZBX_DEV_PFX) - 1))
strscpy(dev_path, ZBX_DEV_PFX);
strscat(dev_path, devname);
if (zbx_stat(dev_path, &dev_st) == 0)
dev_exists = SUCCEED;
}
if (NULL == (f = fopen(INFO_FILE_NAME, "r")))
return ret;
while (NULL != fgets(tmp, sizeof(tmp), f))
{
PARSE(tmp);
if (NULL != devname && '\0' != *devname && 0 != strcmp(devname, "all"))
{
if (0 != strcmp(name, devname))
{
if (SUCCEED != dev_exists
|| major(dev_st.st_rdev) != rdev_major
|| minor(dev_st.st_rdev) != rdev_minor)
continue;
}
else
found = 1;
}
dstat[ZBX_DSTAT_R_OPER] += ds[ZBX_DSTAT_R_OPER];
dstat[ZBX_DSTAT_R_SECT] += ds[ZBX_DSTAT_R_SECT];
dstat[ZBX_DSTAT_W_OPER] += ds[ZBX_DSTAT_W_OPER];
dstat[ZBX_DSTAT_W_SECT] += ds[ZBX_DSTAT_W_SECT];
ret = SUCCEED;
if (1 == found)
break;
}
zbx_fclose(f);
return ret;
}
/******************************************************************************
* *
* Comments: Translate device name to the one used internally by kernel. The *
* translation is done based on minor and major device numbers *
* listed in INFO_FILE_NAME . If the names differ it is usually an *
* LVM device which is listed in kernel device mapper. *
* *
******************************************************************************/
static int get_kernel_devname(const char *devname, char *kernel_devname, size_t max_kernel_devname_len)
{
FILE *f;
char tmp[MAX_STRING_LEN], name[MAX_STRING_LEN], dev_path[MAX_STRING_LEN];
int ret = FAIL;
zbx_uint64_t ds[ZBX_DSTAT_MAX], rdev_major, rdev_minor;
zbx_stat_t dev_st;
if ('\0' == *devname)
return ret;
*dev_path = '\0';
if (0 != strncmp(devname, ZBX_DEV_PFX, sizeof(ZBX_DEV_PFX) - 1))
strscpy(dev_path, ZBX_DEV_PFX);
strscat(dev_path, devname);
if (zbx_stat(dev_path, &dev_st) < 0 || NULL == (f = fopen(INFO_FILE_NAME, "r")))
return ret;
while (NULL != fgets(tmp, sizeof(tmp), f))
{
PARSE(tmp);
if (major(dev_st.st_rdev) != rdev_major || minor(dev_st.st_rdev) != rdev_minor)
continue;
zbx_strlcpy(kernel_devname, name, max_kernel_devname_len);
ret = SUCCEED;
break;
}
zbx_fclose(f);
return ret;
}
static int vfs_dev_rw(AGENT_REQUEST *request, AGENT_RESULT *result, int rw)
{
ZBX_SINGLE_DISKDEVICE_DATA *device;
char *devname, *tmp, kernel_devname[MAX_STRING_LEN];
int type, mode;
zbx_uint64_t dstats[ZBX_DSTAT_MAX];
if (3 < request->nparam) /* too many parameters? */
return SYSINFO_RET_FAIL;
devname = get_rparam(request, 0);
tmp = get_rparam(request, 1);
if (NULL == tmp || '\0' == *tmp || 0 == strcmp(tmp, "sps")) /* default parameter */
type = ZBX_DSTAT_TYPE_SPS;
else if (0 == strcmp(tmp, "ops"))
type = ZBX_DSTAT_TYPE_OPS;
else if (0 == strcmp(tmp, "sectors"))
type = ZBX_DSTAT_TYPE_SECT;
else if (0 == strcmp(tmp, "operations"))
type = ZBX_DSTAT_TYPE_OPER;
else
return SYSINFO_RET_FAIL;
if (type == ZBX_DSTAT_TYPE_SECT || type == ZBX_DSTAT_TYPE_OPER)
{
if (request->nparam > 2)
return SYSINFO_RET_FAIL;
if (SUCCEED != get_diskstat(devname, dstats))
return SYSINFO_RET_FAIL;
if (ZBX_DSTAT_TYPE_SECT == type)
SET_UI64_RESULT(result, dstats[(ZBX_DEV_READ == rw ? ZBX_DSTAT_R_SECT : ZBX_DSTAT_W_SECT)]);
else
SET_UI64_RESULT(result, dstats[(ZBX_DEV_READ == rw ? ZBX_DSTAT_R_OPER : ZBX_DSTAT_W_OPER)]);
return SYSINFO_RET_OK;
}
tmp = get_rparam(request, 2);
if (NULL == tmp || '\0' == *tmp || 0 == strcmp(tmp, "avg1")) /* default parameter */
mode = ZBX_AVG1;
else if (0 == strcmp(tmp, "avg5"))
mode = ZBX_AVG5;
else if (0 == strcmp(tmp, "avg15"))
mode = ZBX_AVG15;
else
return SYSINFO_RET_FAIL;
if (NULL == collector)
{
/* CPU statistics collector and (optionally) disk statistics collector is started only when Zabbix */
/* agentd is running as a daemon. When Zabbix agent or agentd is started with "-p" or "-t" parameter */
/* the collectors are not available and keys "vfs.dev.read", "vfs.dev.write" with some parameters */
/* (e.g. sps, ops) are not supported. */
SET_MSG_RESULT(result, strdup("This parameter is available only in daemon mode when collectors are started."));
return SYSINFO_RET_FAIL;
}
if (NULL == devname || '\0' == *devname || 0 == strcmp(devname, "all"))
*kernel_devname = '\0';
else if (SUCCEED != get_kernel_devname(devname, kernel_devname, sizeof(kernel_devname)))
return SYSINFO_RET_FAIL;
if (NULL == (device = collector_diskdevice_get(kernel_devname)))
{
if (SUCCEED != get_diskstat(kernel_devname, dstats))
return SYSINFO_RET_FAIL;
if (NULL == (device = collector_diskdevice_add(kernel_devname)))
return SYSINFO_RET_FAIL;
}
if (ZBX_DSTAT_TYPE_SPS == type)
SET_DBL_RESULT(result, (ZBX_DEV_READ == rw ? device->r_sps[mode] : device->w_sps[mode]));
else
SET_DBL_RESULT(result, (ZBX_DEV_READ == rw ? device->r_ops[mode] : device->w_ops[mode]));
return SYSINFO_RET_OK;
}
int VFS_DEV_READ(AGENT_REQUEST *request, AGENT_RESULT *result)
{
return vfs_dev_rw(request, result, ZBX_DEV_READ);
}
int VFS_DEV_WRITE(AGENT_REQUEST *request, AGENT_RESULT *result)
{
return vfs_dev_rw(request, result, ZBX_DEV_WRITE);
}
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