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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 "zbxstr.h"
#include "zbxjson.h"
#include "zbxalgo.h"
#include "log.h"
typedef struct
{
char *fsname;
char *fstype;
char *fslabel;
char *fsdrivetype;
zbx_uint64_t total;
zbx_uint64_t not_used;
zbx_uint64_t used;
double pfree;
double pused;
}
zbx_wmpoint_t;
static wchar_t *zbx_wcsdup2(const char *filename, int line, wchar_t *old, const wchar_t *str)
{
int retry;
wchar_t *ptr = NULL;
zbx_free(old);
for (retry = 10; 0 < retry && NULL == ptr; ptr = wcsdup(str), retry--)
;
if (NULL != ptr)
return ptr;
zabbix_log(LOG_LEVEL_CRIT, "[file:%s,line:%d] zbx_wcsdup: out of memory. Requested " ZBX_FS_SIZE_T " bytes.",
filename, line, (zbx_fs_size_t)((wcslen(str) + 1) * sizeof(wchar_t)));
exit(EXIT_FAILURE);
}
static int wmpoint_compare_func(const void *d1, const void *d2)
{
const zbx_wmpoint_t *m1 = *(const zbx_wmpoint_t **)d1;
const zbx_wmpoint_t *m2 = *(const zbx_wmpoint_t **)d2;
return strcmp(m1->fsname, m2->fsname);
}
static int get_fs_size_stat(const char *fs, zbx_uint64_t *total, zbx_uint64_t *not_used,
zbx_uint64_t *used, double *pfree, double *pused, char **error)
{
wchar_t *wpath;
ULARGE_INTEGER freeBytes, totalBytes;
wpath = zbx_utf8_to_unicode(fs);
if (0 == GetDiskFreeSpaceEx(wpath, &freeBytes, &totalBytes, NULL))
{
zbx_free(wpath);
*error = zbx_dsprintf(NULL, "Cannot obtain filesystem information: %s",
strerror_from_system(GetLastError()));
zabbix_log(LOG_LEVEL_DEBUG,"%s failed with error: %s",__func__, *error);
return SYSINFO_RET_FAIL;
}
zbx_free(wpath);
*total = totalBytes.QuadPart;
*not_used = freeBytes.QuadPart;
*used = totalBytes.QuadPart - freeBytes.QuadPart;
*pfree = (double)(__int64)freeBytes.QuadPart * 100. / (double)(__int64)totalBytes.QuadPart;
*pused = (double)((__int64)totalBytes.QuadPart - (__int64)freeBytes.QuadPart) * 100. /
(double)(__int64)totalBytes.QuadPart;
return SYSINFO_RET_OK;
}
static int vfs_fs_size(AGENT_REQUEST *request, AGENT_RESULT *result, HANDLE timeout_event)
{
char *path, *mode;
char *error;
zbx_uint64_t total, used, free;
double pused,pfree;
/* 'timeout_event' argument is here to make the vfs_fs_size() prototype as required by */
/* zbx_execute_threaded_metric() on MS Windows */
ZBX_UNUSED(timeout_event);
if (2 < request->nparam)
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Too many parameters."));
return SYSINFO_RET_FAIL;
}
path = get_rparam(request, 0);
mode = get_rparam(request, 1);
if (NULL == path || '\0' == *path)
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid first parameter."));
return SYSINFO_RET_FAIL;
}
if (SYSINFO_RET_OK != get_fs_size_stat(path, &total, &free, &used, &pfree, &pused, &error))
{
SET_MSG_RESULT(result, error);
return SYSINFO_RET_FAIL;
}
if (NULL == mode || '\0' == *mode || 0 == strcmp(mode, "total"))
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_SIZE(AGENT_REQUEST *request, AGENT_RESULT *result)
{
return zbx_execute_threaded_metric(vfs_fs_size, request, result);
}
static const char *get_drive_type_string(UINT type)
{
switch (type)
{
case DRIVE_UNKNOWN:
return "unknown";
case DRIVE_NO_ROOT_DIR:
return "norootdir";
case DRIVE_REMOVABLE:
return "removable";
case DRIVE_FIXED:
return "fixed";
case DRIVE_REMOTE:
return "remote";
case DRIVE_CDROM:
return "cdrom";
case DRIVE_RAMDISK:
return "ramdisk";
default:
THIS_SHOULD_NEVER_HAPPEN;
return "unknown";
}
}
static void get_fs_data(const wchar_t* path, char **fsname, char **fstype, char **fslabel, char **fsdrivetype)
{
wchar_t fs_name[MAX_PATH + 1], vol_name[MAX_PATH + 1], *long_path = NULL;
size_t sz;
*fsname = zbx_unicode_to_utf8(path);
if (0 < (sz = strlen(*fsname)) && '\\' == (*fsname)[--sz])
(*fsname)[sz] = '\0';
/* add \\?\ prefix if path exceeds MAX_PATH */
if (MAX_PATH < (sz = wcslen(path) + 1) && 0 != wcsncmp(path, L"\\\\?\\", 4))
{
/* allocate memory buffer enough to hold null-terminated path and prefix */
long_path = (wchar_t*)zbx_malloc(long_path, (sz + 4) * sizeof(wchar_t));
long_path[0] = L'\\';
long_path[1] = L'\\';
long_path[2] = L'?';
long_path[3] = L'\\';
memcpy(long_path + 4, path, sz * sizeof(wchar_t));
path = long_path;
}
if (FALSE != GetVolumeInformation(path, vol_name, ARRSIZE(vol_name), NULL, NULL, NULL, fs_name,
ARRSIZE(fs_name)))
{
*fstype = zbx_unicode_to_utf8(fs_name);
*fslabel = zbx_unicode_to_utf8(vol_name);
}
else
{
*fstype = zbx_strdup(NULL, "UNKNOWN");
*fslabel = zbx_strdup(NULL, "");
}
*fsdrivetype = zbx_strdup(NULL, get_drive_type_string(GetDriveType(path)));
zbx_free(long_path);
}
static int add_fs_to_vector(zbx_vector_ptr_t *mntpoints, wchar_t *path, char **error)
{
zbx_wmpoint_t *mntpoint;
zbx_uint64_t total, not_used, used;
double pfree, pused;
char *fsname = NULL, *fstype = NULL, *fslabel = NULL, *fsdrivetype = NULL;
get_fs_data(path, &fsname, &fstype, &fslabel, &fsdrivetype);
if (SYSINFO_RET_OK != get_fs_size_stat(fsname, &total, ¬_used, &used, &pfree, &pused, error))
{
zbx_free(fsname);
zbx_free(fstype);
zbx_free(fsdrivetype);
return FAIL;
}
mntpoint = (zbx_wmpoint_t *)zbx_malloc(NULL, sizeof(zbx_wmpoint_t));
mntpoint->fsname = fsname;
mntpoint->fstype = fstype;
mntpoint->fslabel = fslabel;
mntpoint->fsdrivetype = fsdrivetype;
mntpoint->total = total;
mntpoint->not_used = not_used;
mntpoint->used = used;
mntpoint->pfree = pfree;
mntpoint->pused = pused;
zbx_vector_ptr_append(mntpoints, mntpoint);
return SUCCEED;
}
static void zbx_wmpoints_free(zbx_wmpoint_t *mpoint)
{
zbx_free(mpoint->fsname);
zbx_free(mpoint->fstype);
zbx_free(mpoint->fslabel);
zbx_free(mpoint->fsdrivetype);
zbx_free(mpoint);
}
static int get_mount_paths(zbx_vector_ptr_t *mount_paths, char **error)
{
#define zbx_wcsdup(old, str) zbx_wcsdup2(__FILE__, __LINE__, old, str)
wchar_t *buffer = NULL, volume_name[MAX_PATH + 1], *p;
DWORD size_dw, last_error;
HANDLE volume = INVALID_HANDLE_VALUE;
size_t sz;
int ret = FAIL;
/* make an initial call to GetLogicalDriveStrings() to get the necessary size into the dwSize variable */
if (0 == (size_dw = GetLogicalDriveStrings(0, buffer)))
{
*error = zbx_strdup(*error, "Cannot obtain necessary buffer size from system.");
return FAIL;
}
buffer = (wchar_t *)zbx_malloc(buffer, (size_dw + 1) * sizeof(wchar_t));
/* make a second call to GetLogicalDriveStrings() to get the actual data we require */
if (0 == (size_dw = GetLogicalDriveStrings(size_dw, buffer)))
{
*error = zbx_strdup(*error, "Cannot obtain necessary buffer size from system.");
goto out;
}
/* add drive letters */
for (p = buffer, sz = wcslen(p); sz > 0; p += sz + 1, sz = wcslen(p))
zbx_vector_ptr_append(mount_paths, zbx_wcsdup(NULL, p));
if (INVALID_HANDLE_VALUE == (volume = FindFirstVolume(volume_name, ARRSIZE(volume_name))))
{
*error = zbx_strdup(*error, "Cannot find a volume.");
goto out;
}
/* search volumes for mount point folder paths */
do
{
while (FALSE == GetVolumePathNamesForVolumeName(volume_name, buffer, size_dw, &size_dw))
{
if (ERROR_MORE_DATA != (last_error = GetLastError()))
{
*error = zbx_dsprintf(*error, "Cannot obtain a list of filesystems: %s",
strerror_from_system(last_error));
goto out;
}
buffer = (wchar_t*)zbx_realloc(buffer, size_dw * sizeof(wchar_t));
}
for (p = buffer, sz = wcslen(p); sz > 0; p += sz + 1, sz = wcslen(p))
{
/* add mount point folder paths but skip drive letters */
if (3 < sz)
zbx_vector_ptr_append(mount_paths, zbx_wcsdup(NULL, p));
}
} while (FALSE != FindNextVolume(volume, volume_name, ARRSIZE(volume_name)));
if (ERROR_NO_MORE_FILES != (last_error = GetLastError()))
{
*error = zbx_dsprintf(*error, "Cannot obtain complete list of filesystems.",
strerror_from_system(last_error));
goto out;
}
ret = SUCCEED;
out:
if (INVALID_HANDLE_VALUE != volume)
FindVolumeClose(volume);
zbx_free(buffer);
return ret;
#undef zbx_wcsdup
}
int VFS_FS_DISCOVERY(AGENT_REQUEST *request, AGENT_RESULT *result)
{
struct zbx_json j;
int i, ret = SYSINFO_RET_FAIL;
zbx_vector_ptr_t mount_paths;
char *error = NULL, *fsname, *fstype, *fslabel, *fsdrivetype;
zbx_vector_ptr_create(&mount_paths);
zbx_json_initarray(&j, ZBX_JSON_STAT_BUF_LEN);
if (FAIL == get_mount_paths(&mount_paths, &error))
{
SET_MSG_RESULT(result, error);
goto out;
}
for (i = 0; i < mount_paths.values_num; i++)
{
get_fs_data(mount_paths.values[i], &fsname, &fstype, &fslabel, &fsdrivetype);
zbx_json_addobject(&j, NULL);
zbx_json_addstring(&j, ZBX_LLD_MACRO_FSNAME, fsname, ZBX_JSON_TYPE_STRING);
zbx_json_addstring(&j, ZBX_LLD_MACRO_FSTYPE, fstype, ZBX_JSON_TYPE_STRING);
zbx_json_addstring(&j, ZBX_LLD_MACRO_FSLABEL, fslabel, ZBX_JSON_TYPE_STRING);
zbx_json_addstring(&j, ZBX_LLD_MACRO_FSDRIVETYPE, fsdrivetype, ZBX_JSON_TYPE_STRING);
zbx_json_close(&j);
zbx_free(fsname);
zbx_free(fstype);
zbx_free(fsdrivetype);
}
zbx_json_close(&j);
SET_STR_RESULT(result, zbx_strdup(NULL, j.buffer));
ret = SYSINFO_RET_OK;
out:
zbx_vector_ptr_clear_ext(&mount_paths, (zbx_clean_func_t)zbx_ptr_free);
zbx_vector_ptr_destroy(&mount_paths);
zbx_json_free(&j);
return ret;
}
static int vfs_fs_get(AGENT_REQUEST *request, AGENT_RESULT *result, HANDLE timeout_event)
{
size_t sz;
struct zbx_json j;
zbx_vector_ptr_t mntpoints;
zbx_wmpoint_t *mpoint;
int i, ret = SYSINFO_RET_FAIL;
char *error = NULL;
zbx_vector_ptr_t mount_paths;
zbx_vector_ptr_create(&mount_paths);
zbx_json_initarray(&j, ZBX_JSON_STAT_BUF_LEN);
if (FAIL == get_mount_paths(&mount_paths, &error))
{
SET_MSG_RESULT(result, error);
goto out;
}
/* 'timeout_event' argument is here to make the vfs_fs_size() prototype as required by */
/* zbx_execute_threaded_metric() on MS Windows */
ZBX_UNUSED(timeout_event);
zbx_vector_ptr_create(&mntpoints);
for (i = 0; i < mount_paths.values_num; i++)
{
if (FAIL == add_fs_to_vector(&mntpoints, mount_paths.values[i], &error))
{
zabbix_log(LOG_LEVEL_DEBUG, "%s", error);
zbx_free(error);
continue;
}
}
zbx_vector_ptr_clear_ext(&mount_paths, (zbx_clean_func_t)zbx_ptr_free);
if (FAIL == get_mount_paths(&mount_paths, &error))
{
SET_MSG_RESULT(result, error);
goto out;
}
for (i = 0; i < mount_paths.values_num; i++)
{
zbx_wmpoint_t mpoint_local;
int idx;
mpoint_local.fsname = zbx_unicode_to_utf8(mount_paths.values[i]);
if (0 < (sz = strlen(mpoint_local.fsname)) && '\\' == mpoint_local.fsname[--sz])
mpoint_local.fsname[sz] = '\0';
if (FAIL != (idx = zbx_vector_ptr_search(&mntpoints, &mpoint_local, wmpoint_compare_func)))
{
mpoint = (zbx_wmpoint_t *)mntpoints.values[idx];
zbx_json_addobject(&j, NULL);
zbx_json_addstring(&j, ZBX_SYSINFO_TAG_FSNAME, mpoint->fsname, ZBX_JSON_TYPE_STRING);
zbx_json_addstring(&j, ZBX_SYSINFO_TAG_FSTYPE, mpoint->fstype, ZBX_JSON_TYPE_STRING);
zbx_json_addstring(&j, ZBX_SYSINFO_TAG_FSLABEL, mpoint->fslabel, ZBX_JSON_TYPE_STRING);
zbx_json_addstring(&j, ZBX_SYSINFO_TAG_FSDRIVETYPE, mpoint->fsdrivetype, ZBX_JSON_TYPE_STRING);
zbx_json_addobject(&j, ZBX_SYSINFO_TAG_BYTES);
zbx_json_adduint64(&j, ZBX_SYSINFO_TAG_TOTAL, mpoint->total);
zbx_json_adduint64(&j, ZBX_SYSINFO_TAG_FREE, mpoint->not_used);
zbx_json_adduint64(&j, ZBX_SYSINFO_TAG_USED, mpoint->used);
zbx_json_addfloat(&j, ZBX_SYSINFO_TAG_PFREE, mpoint->pfree);
zbx_json_addfloat(&j, ZBX_SYSINFO_TAG_PUSED, mpoint->pused);
zbx_json_close(&j);
zbx_json_close(&j);
}
zbx_free(mpoint_local.fsname);
}
zbx_json_close(&j);
SET_STR_RESULT(result, zbx_strdup(NULL, j.buffer));
ret = SYSINFO_RET_OK;
out:
zbx_vector_ptr_clear_ext(&mount_paths, (zbx_clean_func_t)zbx_ptr_free);
zbx_vector_ptr_destroy(&mount_paths);
zbx_json_free(&j);
zbx_vector_ptr_clear_ext(&mntpoints, (zbx_clean_func_t)zbx_wmpoints_free);
zbx_vector_ptr_destroy(&mntpoints);
return ret;
}
int VFS_FS_GET(AGENT_REQUEST *request, AGENT_RESULT *result)
{
return zbx_execute_threaded_metric(vfs_fs_get, request, result);
}
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