http-server-status/vendor/github.com/shirou/gopsutil/disk/disk_windows.go
2021-09-20 11:28:00 +02:00

183 lines
6 KiB
Go

// +build windows
package disk
import (
"bytes"
"context"
"fmt"
"syscall"
"unsafe"
"github.com/shirou/gopsutil/internal/common"
"golang.org/x/sys/windows"
)
var (
procGetDiskFreeSpaceExW = common.Modkernel32.NewProc("GetDiskFreeSpaceExW")
procGetLogicalDriveStringsW = common.Modkernel32.NewProc("GetLogicalDriveStringsW")
procGetDriveType = common.Modkernel32.NewProc("GetDriveTypeW")
procGetVolumeInformation = common.Modkernel32.NewProc("GetVolumeInformationW")
)
var (
FileFileCompression = int64(16) // 0x00000010
FileReadOnlyVolume = int64(524288) // 0x00080000
)
// diskPerformance is an equivalent representation of DISK_PERFORMANCE in the Windows API.
// https://docs.microsoft.com/fr-fr/windows/win32/api/winioctl/ns-winioctl-disk_performance
type diskPerformance struct {
BytesRead int64
BytesWritten int64
ReadTime int64
WriteTime int64
IdleTime int64
ReadCount uint32
WriteCount uint32
QueueDepth uint32
SplitCount uint32
QueryTime int64
StorageDeviceNumber uint32
StorageManagerName [8]uint16
alignmentPadding uint32 // necessary for 32bit support, see https://github.com/elastic/beats/pull/16553
}
func UsageWithContext(ctx context.Context, path string) (*UsageStat, error) {
lpFreeBytesAvailable := int64(0)
lpTotalNumberOfBytes := int64(0)
lpTotalNumberOfFreeBytes := int64(0)
diskret, _, err := procGetDiskFreeSpaceExW.Call(
uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(path))),
uintptr(unsafe.Pointer(&lpFreeBytesAvailable)),
uintptr(unsafe.Pointer(&lpTotalNumberOfBytes)),
uintptr(unsafe.Pointer(&lpTotalNumberOfFreeBytes)))
if diskret == 0 {
return nil, err
}
ret := &UsageStat{
Path: path,
Total: uint64(lpTotalNumberOfBytes),
Free: uint64(lpTotalNumberOfFreeBytes),
Used: uint64(lpTotalNumberOfBytes) - uint64(lpTotalNumberOfFreeBytes),
UsedPercent: (float64(lpTotalNumberOfBytes) - float64(lpTotalNumberOfFreeBytes)) / float64(lpTotalNumberOfBytes) * 100,
// InodesTotal: 0,
// InodesFree: 0,
// InodesUsed: 0,
// InodesUsedPercent: 0,
}
return ret, nil
}
func PartitionsWithContext(ctx context.Context, all bool) ([]PartitionStat, error) {
var ret []PartitionStat
lpBuffer := make([]byte, 254)
diskret, _, err := procGetLogicalDriveStringsW.Call(
uintptr(len(lpBuffer)),
uintptr(unsafe.Pointer(&lpBuffer[0])))
if diskret == 0 {
return ret, err
}
for _, v := range lpBuffer {
if v >= 65 && v <= 90 {
path := string(v) + ":"
typepath, _ := windows.UTF16PtrFromString(path)
typeret, _, _ := procGetDriveType.Call(uintptr(unsafe.Pointer(typepath)))
if typeret == 0 {
return ret, windows.GetLastError()
}
// 2: DRIVE_REMOVABLE 3: DRIVE_FIXED 4: DRIVE_REMOTE 5: DRIVE_CDROM
if typeret == 2 || typeret == 3 || typeret == 4 || typeret == 5 {
lpVolumeNameBuffer := make([]byte, 256)
lpVolumeSerialNumber := int64(0)
lpMaximumComponentLength := int64(0)
lpFileSystemFlags := int64(0)
lpFileSystemNameBuffer := make([]byte, 256)
volpath, _ := windows.UTF16PtrFromString(string(v) + ":/")
driveret, _, err := procGetVolumeInformation.Call(
uintptr(unsafe.Pointer(volpath)),
uintptr(unsafe.Pointer(&lpVolumeNameBuffer[0])),
uintptr(len(lpVolumeNameBuffer)),
uintptr(unsafe.Pointer(&lpVolumeSerialNumber)),
uintptr(unsafe.Pointer(&lpMaximumComponentLength)),
uintptr(unsafe.Pointer(&lpFileSystemFlags)),
uintptr(unsafe.Pointer(&lpFileSystemNameBuffer[0])),
uintptr(len(lpFileSystemNameBuffer)))
if driveret == 0 {
if typeret == 5 || typeret == 2 {
continue //device is not ready will happen if there is no disk in the drive
}
return ret, err
}
opts := "rw"
if lpFileSystemFlags&FileReadOnlyVolume != 0 {
opts = "ro"
}
if lpFileSystemFlags&FileFileCompression != 0 {
opts += ".compress"
}
d := PartitionStat{
Mountpoint: path,
Device: path,
Fstype: string(bytes.Replace(lpFileSystemNameBuffer, []byte("\x00"), []byte(""), -1)),
Opts: opts,
}
ret = append(ret, d)
}
}
}
return ret, nil
}
func IOCountersWithContext(ctx context.Context, names ...string) (map[string]IOCountersStat, error) {
// https://github.com/giampaolo/psutil/blob/544e9daa4f66a9f80d7bf6c7886d693ee42f0a13/psutil/arch/windows/disk.c#L83
drivemap := make(map[string]IOCountersStat, 0)
var diskPerformance diskPerformance
lpBuffer := make([]uint16, 254)
lpBufferLen, err := windows.GetLogicalDriveStrings(uint32(len(lpBuffer)), &lpBuffer[0])
if err != nil {
return drivemap, err
}
for _, v := range lpBuffer[:lpBufferLen] {
if 'A' <= v && v <= 'Z' {
path := string(rune(v)) + ":"
typepath, _ := windows.UTF16PtrFromString(path)
typeret := windows.GetDriveType(typepath)
if typeret == 0 {
return drivemap, windows.GetLastError()
}
if typeret != windows.DRIVE_FIXED {
continue
}
szDevice := fmt.Sprintf(`\\.\%s`, path)
const IOCTL_DISK_PERFORMANCE = 0x70020
h, err := windows.CreateFile(syscall.StringToUTF16Ptr(szDevice), 0, windows.FILE_SHARE_READ|windows.FILE_SHARE_WRITE, nil, windows.OPEN_EXISTING, 0, 0)
if err != nil {
if err == windows.ERROR_FILE_NOT_FOUND {
continue
}
return drivemap, err
}
defer windows.CloseHandle(h)
var diskPerformanceSize uint32
err = windows.DeviceIoControl(h, IOCTL_DISK_PERFORMANCE, nil, 0, (*byte)(unsafe.Pointer(&diskPerformance)), uint32(unsafe.Sizeof(diskPerformance)), &diskPerformanceSize, nil)
if err != nil {
return drivemap, err
}
drivemap[path] = IOCountersStat{
ReadBytes: uint64(diskPerformance.BytesRead),
WriteBytes: uint64(diskPerformance.BytesWritten),
ReadCount: uint64(diskPerformance.ReadCount),
WriteCount: uint64(diskPerformance.WriteCount),
ReadTime: uint64(diskPerformance.ReadTime / 10000 / 1000), // convert to ms: https://github.com/giampaolo/psutil/issues/1012
WriteTime: uint64(diskPerformance.WriteTime / 10000 / 1000),
Name: path,
}
}
}
return drivemap, nil
}