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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 "stats.h"
#include "diskdevices.h"
#include "zbxstr.h"
#define ZBX_DEV_PFX "/dev/"
#define ZBX_DEV_READ 0
#define ZBX_DEV_WRITE 1
static struct statinfo *si = NULL;
int zbx_get_diskstat(const char *devname, zbx_uint64_t *dstat)
{
int i;
struct devstat *ds = NULL;
int ret = FAIL;
char dev[DEVSTAT_NAME_LEN + 10];
const char *pd; /* pointer to device name without '/dev/' prefix, e.g. 'da0' */
assert(devname);
for (i = 0; i < ZBX_DSTAT_MAX; i++)
dstat[i] = (zbx_uint64_t)__UINT64_C(0);
if (NULL == si)
{
si = (struct statinfo *)zbx_malloc(si, sizeof(struct statinfo));
si->dinfo = (struct devinfo *)zbx_malloc(NULL, sizeof(struct devinfo));
memset(si->dinfo, 0, sizeof(struct devinfo));
}
pd = devname;
/* skip prefix ZBX_DEV_PFX, if present */
if ('\0' != *devname && 0 == strncmp(pd, ZBX_DEV_PFX, ZBX_CONST_STRLEN(ZBX_DEV_PFX)))
pd += ZBX_CONST_STRLEN(ZBX_DEV_PFX);
#if DEVSTAT_USER_API_VER >= 5
if (-1 == devstat_getdevs(NULL, si))
#else
if (-1 == getdevs(si))
#endif
return FAIL;
for (i = 0; i < si->dinfo->numdevs; i++)
{
ds = &si->dinfo->devices[i];
/* empty '*devname' string means adding statistics for all disks together */
if ('\0' != *devname)
{
zbx_snprintf(dev, sizeof(dev), "%s%d", ds->device_name, ds->unit_number);
if (0 != strcmp(dev, pd))
continue;
}
#if DEVSTAT_USER_API_VER >= 5
dstat[ZBX_DSTAT_R_OPER] += (zbx_uint64_t)ds->operations[DEVSTAT_READ];
dstat[ZBX_DSTAT_W_OPER] += (zbx_uint64_t)ds->operations[DEVSTAT_WRITE];
dstat[ZBX_DSTAT_R_BYTE] += (zbx_uint64_t)ds->bytes[DEVSTAT_READ];
dstat[ZBX_DSTAT_W_BYTE] += (zbx_uint64_t)ds->bytes[DEVSTAT_WRITE];
#else
dstat[ZBX_DSTAT_R_OPER] += (zbx_uint64_t)ds->num_reads;
dstat[ZBX_DSTAT_W_OPER] += (zbx_uint64_t)ds->num_writes;
dstat[ZBX_DSTAT_R_BYTE] += (zbx_uint64_t)ds->bytes_read;
dstat[ZBX_DSTAT_W_BYTE] += (zbx_uint64_t)ds->bytes_written;
#endif
ret = SUCCEED;
if ('\0' != *devname)
break;
}
return ret;
}
static int vfs_dev_rw(AGENT_REQUEST *request, AGENT_RESULT *result, int rw)
{
ZBX_SINGLE_DISKDEVICE_DATA *device;
char devname[32], *tmp;
int type, mode;
zbx_uint64_t dstats[ZBX_DSTAT_MAX];
char *pd; /* pointer to device name without '/dev/' prefix, e.g. 'da0' */
if (3 < request->nparam)
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Too many parameters."));
return SYSINFO_RET_FAIL;
}
tmp = get_rparam(request, 0);
if (NULL == tmp || 0 == strcmp(tmp, "all"))
*devname = '\0';
else
zbx_strscpy(devname, tmp);
pd = devname;
if ('\0' != *pd)
{
/* skip prefix ZBX_DEV_PFX, if present */
if (0 == strncmp(pd, ZBX_DEV_PFX, ZBX_CONST_STRLEN(ZBX_DEV_PFX)))
pd += ZBX_CONST_STRLEN(ZBX_DEV_PFX);
}
tmp = get_rparam(request, 1);
if (NULL == tmp || '\0' == *tmp || 0 == strcmp(tmp, "bps")) /* default parameter */
type = ZBX_DSTAT_TYPE_BPS;
else if (0 == strcmp(tmp, "ops"))
type = ZBX_DSTAT_TYPE_OPS;
else if (0 == strcmp(tmp, "bytes"))
type = ZBX_DSTAT_TYPE_BYTE;
else if (0 == strcmp(tmp, "operations"))
type = ZBX_DSTAT_TYPE_OPER;
else
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid second parameter."));
return SYSINFO_RET_FAIL;
}
if (type == ZBX_DSTAT_TYPE_BYTE || type == ZBX_DSTAT_TYPE_OPER)
{
if (2 < request->nparam)
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid number of parameters."));
return SYSINFO_RET_FAIL;
}
if (FAIL == zbx_get_diskstat(pd, dstats))
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot obtain disk information."));
return SYSINFO_RET_FAIL;
}
if (ZBX_DSTAT_TYPE_BYTE == type)
SET_UI64_RESULT(result, dstats[(ZBX_DEV_READ == rw ? ZBX_DSTAT_R_BYTE : ZBX_DSTAT_W_BYTE)]);
else /* ZBX_DSTAT_TYPE_OPER */
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
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid third parameter."));
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, zbx_strdup(NULL, "This item is available only in daemon mode when collectors are"
" started."));
return SYSINFO_RET_FAIL;
}
if (NULL == (device = collector_diskdevice_get(pd)))
{
if (FAIL == zbx_get_diskstat(pd, dstats)) /* validate device name */
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot obtain disk information."));
return SYSINFO_RET_FAIL;
}
if (NULL == (device = collector_diskdevice_add(pd)))
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot add disk device to agent collector."));
return SYSINFO_RET_FAIL;
}
}
if (ZBX_DSTAT_TYPE_BPS == type) /* default parameter */
SET_DBL_RESULT(result, (ZBX_DEV_READ == rw ? device->r_bps[mode] : device->w_bps[mode]));
else if (ZBX_DSTAT_TYPE_OPS == type)
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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