mirror of https://github.com/minio/minio.git
57 lines
1.6 KiB
Go
57 lines
1.6 KiB
Go
|
/*
|
||
|
|
* Minimalist Object Storage, (C) 2015 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 main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"errors"
|
||
|
|
"io/ioutil"
|
||
|
|
"os"
|
||
|
|
"path/filepath"
|
||
|
|
"syscall"
|
||
|
|
|
||
|
|
"github.com/minio/minio/pkg/iodine"
|
||
|
|
)
|
||
|
|
|
||
|
|
// IsUsable provides a comprehensive way of knowing if the provided mountPath is mounted and writable
|
||
|
|
func IsUsable(mountPath string) (bool, error) {
|
||
|
|
mntpoint, err := os.Stat(mountPath)
|
||
|
|
if err != nil {
|
||
|
|
return false, iodine.New(err, nil)
|
||
|
|
}
|
||
|
|
parent, err := os.Stat(filepath.Join(mountPath, ".."))
|
||
|
|
if err != nil {
|
||
|
|
return false, iodine.New(err, nil)
|
||
|
|
}
|
||
|
|
mntpointSt := mntpoint.Sys().(*syscall.Stat_t)
|
||
|
|
parentSt := parent.Sys().(*syscall.Stat_t)
|
||
|
|
|
||
|
|
if mntpointSt.Dev == parentSt.Dev {
|
||
|
|
return false, iodine.New(errors.New("not mounted"), nil)
|
||
|
|
}
|
||
|
|
testFile, err := ioutil.TempFile(mountPath, "writetest-")
|
||
|
|
if err != nil {
|
||
|
|
return false, iodine.New(err, nil)
|
||
|
|
}
|
||
|
|
testFileName := testFile.Name()
|
||
|
|
// close the file, to avoid leaky fd's
|
||
|
|
testFile.Close()
|
||
|
|
if err := os.Remove(testFileName); err != nil {
|
||
|
|
return false, iodine.New(err, nil)
|
||
|
|
}
|
||
|
|
return true, nil
|
||
|
|
}
|