1// Copyright 2020 Google LLC 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// https://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15package mount 16 17import ( 18 "fmt" 19) 20 21type MountEntry struct { 22 Source string 23 FSType string 24 Flags uintptr 25 Data string 26} 27 28type fakeMounter struct { 29 mountMap map[string]MountEntry //keyed by target 30} 31 32func NewFakeMounter() *fakeMounter { 33 var f fakeMounter 34 f.mountMap = make(map[string]MountEntry) 35 return &f 36} 37 38func (f *fakeMounter) Mount(source string, target string, fstype string, flags uintptr, data string) error { 39 //Using the target as the key prevents more 40 //than one source mapping to the same target 41 f.mountMap[target] = MountEntry{ 42 Source: source, 43 FSType: fstype, 44 Flags: flags, 45 Data: data, 46 } 47 return nil 48} 49 50func (f *fakeMounter) Unmount(target string, flags int) error { 51 _, ok := f.mountMap[target] 52 if !ok { 53 return fmt.Errorf("Mount %s not found", target) 54 } 55 delete(f.mountMap, target) 56 return nil 57} 58 59func (f *fakeMounter) List() ([]string, error) { 60 var list []string 61 for target, _ := range f.mountMap { 62 list = append(list, target) 63 } 64 65 return list, nil 66} 67