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108 lines
3.9 KiB
Go
108 lines
3.9 KiB
Go
// +build windows
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// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package disk
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import (
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"fmt"
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"os"
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"syscall"
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"unsafe"
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"golang.org/x/sys/windows"
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)
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var (
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kernel32 = windows.NewLazySystemDLL("kernel32.dll")
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// GetDiskFreeSpaceEx - https://msdn.microsoft.com/en-us/library/windows/desktop/aa364937(v=vs.85).aspx
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// Retrieves information about the amount of space that is available on a disk volume,
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// which is the total amount of space, the total amount of free space, and the total
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// amount of free space available to the user that is associated with the calling thread.
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GetDiskFreeSpaceEx = kernel32.NewProc("GetDiskFreeSpaceExW")
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// GetDiskFreeSpace - https://msdn.microsoft.com/en-us/library/windows/desktop/aa364935(v=vs.85).aspx
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// Retrieves information about the specified disk, including the amount of free space on the disk.
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GetDiskFreeSpace = kernel32.NewProc("GetDiskFreeSpaceW")
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)
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// GetInfo returns total and free bytes available in a directory, e.g. `C:\`.
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// It returns free space available to the user (including quota limitations)
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//
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// https://msdn.microsoft.com/en-us/library/windows/desktop/aa364937(v=vs.85).aspx
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func GetInfo(path string) (info Info, err error) {
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// Stat to know if the path exists.
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if _, err = os.Stat(path); err != nil {
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return Info{}, err
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}
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lpFreeBytesAvailable := int64(0)
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lpTotalNumberOfBytes := int64(0)
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lpTotalNumberOfFreeBytes := int64(0)
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// Extract values safely
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// BOOL WINAPI GetDiskFreeSpaceEx(
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// _In_opt_ LPCTSTR lpDirectoryName,
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// _Out_opt_ PULARGE_INTEGER lpFreeBytesAvailable,
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// _Out_opt_ PULARGE_INTEGER lpTotalNumberOfBytes,
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// _Out_opt_ PULARGE_INTEGER lpTotalNumberOfFreeBytes
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// );
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_, _, _ = GetDiskFreeSpaceEx.Call(uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(path))),
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uintptr(unsafe.Pointer(&lpFreeBytesAvailable)),
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uintptr(unsafe.Pointer(&lpTotalNumberOfBytes)),
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uintptr(unsafe.Pointer(&lpTotalNumberOfFreeBytes)))
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if uint64(lpTotalNumberOfFreeBytes) > uint64(lpTotalNumberOfBytes) {
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return info, fmt.Errorf("detected free space (%d) > total disk space (%d), fs corruption at (%s). please run 'fsck'",
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uint64(lpTotalNumberOfFreeBytes), uint64(lpTotalNumberOfBytes), path)
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}
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info = Info{
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Total: uint64(lpTotalNumberOfBytes),
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Free: uint64(lpTotalNumberOfFreeBytes),
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Used: uint64(lpTotalNumberOfBytes) - uint64(lpTotalNumberOfFreeBytes),
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FSType: getFSType(path),
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}
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// Return values of GetDiskFreeSpace()
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lpSectorsPerCluster := uint32(0)
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lpBytesPerSector := uint32(0)
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lpNumberOfFreeClusters := uint32(0)
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lpTotalNumberOfClusters := uint32(0)
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// Extract values safely
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// BOOL WINAPI GetDiskFreeSpace(
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// _In_ LPCTSTR lpRootPathName,
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// _Out_ LPDWORD lpSectorsPerCluster,
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// _Out_ LPDWORD lpBytesPerSector,
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// _Out_ LPDWORD lpNumberOfFreeClusters,
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// _Out_ LPDWORD lpTotalNumberOfClusters
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// );
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_, _, _ = GetDiskFreeSpace.Call(uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(path))),
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uintptr(unsafe.Pointer(&lpSectorsPerCluster)),
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uintptr(unsafe.Pointer(&lpBytesPerSector)),
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uintptr(unsafe.Pointer(&lpNumberOfFreeClusters)),
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uintptr(unsafe.Pointer(&lpTotalNumberOfClusters)))
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info.Files = uint64(lpTotalNumberOfClusters)
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info.Ffree = uint64(lpNumberOfFreeClusters)
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return info, nil
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}
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