frostfs-s3-gw/pkg/mountinfo/mountinfo_windows.go

61 lines
1.9 KiB
Go

// +build windows
/*
* MinIO Cloud Storage, (C) 2018 MinIO, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package mountinfo
import (
"path/filepath"
"sync"
"golang.org/x/sys/windows"
)
// CheckCrossDevice - check if any input path has multiple sub-mounts.
// this is a dummy function and returns nil for now.
func CheckCrossDevice(paths []string) error {
return nil
}
// mountPointCache contains results of IsLikelyMountPoint
var mountPointCache sync.Map
// IsLikelyMountPoint determines if a directory is a mountpoint.
func IsLikelyMountPoint(path string) bool {
path = filepath.Dir(path)
if v, ok := mountPointCache.Load(path); ok {
return v.(bool)
}
wpath, _ := windows.UTF16PtrFromString(path)
wvolume := make([]uint16, len(path)+1)
if err := windows.GetVolumePathName(wpath, &wvolume[0], uint32(len(wvolume))); err != nil {
mountPointCache.Store(path, false)
return false
}
switch windows.GetDriveType(&wvolume[0]) {
case windows.DRIVE_FIXED, windows.DRIVE_REMOVABLE, windows.DRIVE_REMOTE, windows.DRIVE_RAMDISK:
// Recognize "fixed", "removable", "remote" and "ramdisk" drives as proper drives
// which can be treated as an actual mount-point, rest can be ignored.
// https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-getdrivetypew
mountPointCache.Store(path, true)
return true
}
mountPointCache.Store(path, false)
return false
}