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63 lines
2.0 KiB
Go
63 lines
2.0 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 mountinfo
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import (
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"path/filepath"
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"sync"
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"golang.org/x/sys/windows"
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)
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// CheckCrossDevice - check if any input path has multiple sub-mounts.
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// this is a dummy function and returns nil for now.
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func CheckCrossDevice(paths []string) error {
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return nil
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}
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// mountPointCache contains results of IsLikelyMountPoint
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var mountPointCache sync.Map
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// IsLikelyMountPoint determines if a directory is a mountpoint.
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func IsLikelyMountPoint(path string) bool {
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path = filepath.Dir(path)
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if v, ok := mountPointCache.Load(path); ok {
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return v.(bool)
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}
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wpath, _ := windows.UTF16PtrFromString(path)
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wvolume := make([]uint16, len(path)+1)
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if err := windows.GetVolumePathName(wpath, &wvolume[0], uint32(len(wvolume))); err != nil {
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mountPointCache.Store(path, false)
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return false
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}
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switch windows.GetDriveType(&wvolume[0]) {
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case windows.DRIVE_FIXED, windows.DRIVE_REMOVABLE, windows.DRIVE_REMOTE, windows.DRIVE_RAMDISK:
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// Recognize "fixed", "removable", "remote" and "ramdisk" drives as proper drives
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// which can be treated as an actual mount-point, rest can be ignored.
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// https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-getdrivetypew
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mountPointCache.Store(path, true)
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return true
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}
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mountPointCache.Store(path, false)
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return false
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}
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