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55 lines
1.5 KiB
55 lines
1.5 KiB
/*
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* Minio Cloud Storage, (C) 2015 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package main
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import (
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"fmt"
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"io/ioutil"
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"os"
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"syscall"
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"github.com/minio/minio/pkg/iodine"
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)
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// isUsable provides a comprehensive way of knowing if the provided mountPath is mounted and writable
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func isUsable(mountPath string) (bool, error) {
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mntpoint, err := os.Stat(mountPath)
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if err != nil {
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return false, iodine.New(err, nil)
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}
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parent, err := os.Stat("/")
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if err != nil {
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return false, iodine.New(err, nil)
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}
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mntpointSt := mntpoint.Sys().(*syscall.Stat_t)
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parentSt := parent.Sys().(*syscall.Stat_t)
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if mntpointSt.Dev == parentSt.Dev {
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return false, iodine.New(fmt.Errorf("Not mounted %s", mountPath), nil)
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}
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testFile, err := ioutil.TempFile(mountPath, "writetest-")
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if err != nil {
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return false, iodine.New(err, nil)
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}
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testFileName := testFile.Name()
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// close the file, to avoid leaky fd's
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testFile.Close()
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if err := os.Remove(testFileName); err != nil {
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return false, iodine.New(err, nil)
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}
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return true, nil
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}
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