60 lines
1.5 KiB
Go
60 lines
1.5 KiB
Go
// +build linux
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/*
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© Copyright IBM Corporation 2017, 2018
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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"golang.org/x/sys/unix"
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)
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// fsTypes contains file system identifier codes.
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// This code will not compile on some operating systems - Linux only.
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var fsTypes = map[int64]string{
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0x61756673: "aufs",
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0xef53: "ext",
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0x6969: "nfs",
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0x65735546: "fuse",
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0x9123683e: "btrfs",
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0x01021994: "tmpfs",
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0x794c7630: "overlayfs",
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0x58465342: "xfs",
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}
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func checkFS(path string) error {
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statfs := &unix.Statfs_t{}
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err := unix.Statfs(path, statfs)
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if err != nil {
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log.Println(err)
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return nil
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}
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// Use a type conversion to make type an int64. On s390x it's a uint32.
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t, ok := fsTypes[int64(statfs.Type)]
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if !ok {
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log.Printf("WARNING: detected %v has unknown filesystem type %x", path, statfs.Type)
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return nil
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}
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switch t {
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case "aufs", "overlayfs", "tmpfs":
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return fmt.Errorf("%v uses unsupported filesystem type: %v", path, t)
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default:
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log.Printf("Detected %v has filesystem type '%v'", path, t)
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return nil
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}
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}
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