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Copy pathdisks.go
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55 lines (50 loc) · 1.53 KB
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Copy pathdisks.go
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55 lines (50 loc) · 1.53 KB
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/*
* Minio Cloud 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 (
"fmt"
"io/ioutil"
"os"
"syscall"
"github.com/minio/minio/pkg/probe"
)
// isUsable provides a comprehensive way of knowing if the provided mountPath is mounted and writable
func isUsable(mountPath string) (bool, *probe.Error) {
mntpoint, err := os.Stat(mountPath)
if err != nil {
return false, probe.NewError(err)
}
parent, err := os.Stat("/")
if err != nil {
return false, probe.NewError(err)
}
mntpointSt := mntpoint.Sys().(*syscall.Stat_t)
parentSt := parent.Sys().(*syscall.Stat_t)
if mntpointSt.Dev == parentSt.Dev {
return false, probe.NewError(fmt.Errorf("Not mounted %s", mountPath))
}
testFile, err := ioutil.TempFile(mountPath, "writetest-")
if err != nil {
return false, probe.NewError(err)
}
// close the file, to avoid leaky fd's
defer testFile.Close()
testFileName := testFile.Name()
if err := os.Remove(testFileName); err != nil {
return false, probe.NewError(err)
}
return true, nil
}