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Copy pathstat_windows.go
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114 lines (97 loc) · 4.11 KB
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//go:build windows
// +build windows
// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package disk
import (
"errors"
"fmt"
"os"
"syscall"
"unsafe"
"golang.org/x/sys/windows"
)
var (
kernel32 = windows.NewLazySystemDLL("kernel32.dll")
// GetDiskFreeSpaceEx - https://msdn.microsoft.com/en-us/library/windows/desktop/aa364937(v=vs.85).aspx
// Retrieves information about the amount of space that is available on a disk volume,
// which is the total amount of space, the total amount of free space, and the total
// amount of free space available to the user that is associated with the calling thread.
GetDiskFreeSpaceEx = kernel32.NewProc("GetDiskFreeSpaceExW")
// GetDiskFreeSpace - https://msdn.microsoft.com/en-us/library/windows/desktop/aa364935(v=vs.85).aspx
// Retrieves information about the specified disk, including the amount of free space on the disk.
GetDiskFreeSpace = kernel32.NewProc("GetDiskFreeSpaceW")
)
// GetInfo returns total and free bytes available in a directory, e.g. `C:\`.
// It returns free space available to the user (including quota limitations)
//
// https://msdn.microsoft.com/en-us/library/windows/desktop/aa364937(v=vs.85).aspx
func GetInfo(path string, _ bool) (info Info, err error) {
// Stat to know if the path exists.
if _, err = os.Stat(path); err != nil {
return Info{}, err
}
lpFreeBytesAvailable := int64(0)
lpTotalNumberOfBytes := int64(0)
lpTotalNumberOfFreeBytes := int64(0)
// Extract values safely
// BOOL WINAPI GetDiskFreeSpaceEx(
// _In_opt_ LPCTSTR lpDirectoryName,
// _Out_opt_ PULARGE_INTEGER lpFreeBytesAvailable,
// _Out_opt_ PULARGE_INTEGER lpTotalNumberOfBytes,
// _Out_opt_ PULARGE_INTEGER lpTotalNumberOfFreeBytes
// );
_, _, _ = GetDiskFreeSpaceEx.Call(uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(path))),
uintptr(unsafe.Pointer(&lpFreeBytesAvailable)),
uintptr(unsafe.Pointer(&lpTotalNumberOfBytes)),
uintptr(unsafe.Pointer(&lpTotalNumberOfFreeBytes)))
if uint64(lpTotalNumberOfFreeBytes) > uint64(lpTotalNumberOfBytes) {
return info, fmt.Errorf("detected free space (%d) > total drive space (%d), fs corruption at (%s). please run 'fsck'",
uint64(lpTotalNumberOfFreeBytes), uint64(lpTotalNumberOfBytes), path)
}
info = Info{
Total: uint64(lpTotalNumberOfBytes),
Free: uint64(lpTotalNumberOfFreeBytes),
Used: uint64(lpTotalNumberOfBytes) - uint64(lpTotalNumberOfFreeBytes),
FSType: getFSType(path),
}
// Return values of GetDiskFreeSpace()
lpSectorsPerCluster := uint32(0)
lpBytesPerSector := uint32(0)
lpNumberOfFreeClusters := uint32(0)
lpTotalNumberOfClusters := uint32(0)
// Extract values safely
// BOOL WINAPI GetDiskFreeSpace(
// _In_ LPCTSTR lpRootPathName,
// _Out_ LPDWORD lpSectorsPerCluster,
// _Out_ LPDWORD lpBytesPerSector,
// _Out_ LPDWORD lpNumberOfFreeClusters,
// _Out_ LPDWORD lpTotalNumberOfClusters
// );
_, _, _ = GetDiskFreeSpace.Call(uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(path))),
uintptr(unsafe.Pointer(&lpSectorsPerCluster)),
uintptr(unsafe.Pointer(&lpBytesPerSector)),
uintptr(unsafe.Pointer(&lpNumberOfFreeClusters)),
uintptr(unsafe.Pointer(&lpTotalNumberOfClusters)))
info.Files = uint64(lpTotalNumberOfClusters)
info.Ffree = uint64(lpNumberOfFreeClusters)
return info, nil
}
// GetAllDrivesIOStats returns IO stats of all drives found in the machine
func GetAllDrivesIOStats() (info AllDrivesIOStats, err error) {
return nil, errors.New("operation unsupported")
}