146 lines
4 KiB
Go
146 lines
4 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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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 mount
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import (
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"sync"
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"github.com/golang/glog"
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)
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// FakeMounter implements mount.Interface for tests.
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type FakeMounter struct {
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MountPoints []MountPoint
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Log []FakeAction
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// Some tests run things in parallel, make sure the mounter does not produce
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// any golang's DATA RACE warnings.
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mutex sync.Mutex
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}
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var _ Interface = &FakeMounter{}
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// Values for FakeAction.Action
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const FakeActionMount = "mount"
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const FakeActionUnmount = "unmount"
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// FakeAction objects are logged every time a fake mount or unmount is called.
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type FakeAction struct {
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Action string // "mount" or "unmount"
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Target string // applies to both mount and unmount actions
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Source string // applies only to "mount" actions
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FSType string // applies only to "mount" actions
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}
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func (f *FakeMounter) ResetLog() {
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f.mutex.Lock()
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defer f.mutex.Unlock()
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f.Log = []FakeAction{}
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}
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func (f *FakeMounter) Mount(source string, target string, fstype string, options []string) error {
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f.mutex.Lock()
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defer f.mutex.Unlock()
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// find 'bind' option
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for _, option := range options {
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if option == "bind" {
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// This is a bind-mount. In order to mimic linux behaviour, we must
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// use the original device of the bind-mount as the real source.
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// E.g. when mounted /dev/sda like this:
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// $ mount /dev/sda /mnt/test
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// $ mount -o bind /mnt/test /mnt/bound
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// then /proc/mount contains:
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// /dev/sda /mnt/test
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// /dev/sda /mnt/bound
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// (and not /mnt/test /mnt/bound)
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// I.e. we must use /dev/sda as source instead of /mnt/test in the
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// bind mount.
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for _, mnt := range f.MountPoints {
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if source == mnt.Path {
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source = mnt.Device
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break
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}
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}
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break
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}
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}
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f.MountPoints = append(f.MountPoints, MountPoint{Device: source, Path: target, Type: fstype})
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glog.V(5).Infof("Fake mounter: mounted %s to %s", source, target)
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f.Log = append(f.Log, FakeAction{Action: FakeActionMount, Target: target, Source: source, FSType: fstype})
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return nil
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}
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func (f *FakeMounter) Unmount(target string) error {
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f.mutex.Lock()
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defer f.mutex.Unlock()
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newMountpoints := []MountPoint{}
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for _, mp := range f.MountPoints {
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if mp.Path == target {
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glog.V(5).Infof("Fake mounter: unmounted %s from %s", mp.Device, target)
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// Don't copy it to newMountpoints
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continue
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}
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newMountpoints = append(newMountpoints, MountPoint{Device: mp.Device, Path: mp.Path, Type: mp.Type})
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}
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f.MountPoints = newMountpoints
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f.Log = append(f.Log, FakeAction{Action: FakeActionUnmount, Target: target})
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return nil
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}
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func (f *FakeMounter) List() ([]MountPoint, error) {
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f.mutex.Lock()
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defer f.mutex.Unlock()
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return f.MountPoints, nil
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}
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func (f *FakeMounter) IsLikelyNotMountPoint(file string) (bool, error) {
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f.mutex.Lock()
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defer f.mutex.Unlock()
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for _, mp := range f.MountPoints {
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if mp.Path == file {
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glog.V(5).Infof("isLikelyMountPoint for %s: mounted %s, false", file, mp.Path)
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return false, nil
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}
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}
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glog.V(5).Infof("isLikelyMountPoint for %s: true", file)
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return true, nil
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}
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func (f *FakeMounter) DeviceOpened(pathname string) (bool, error) {
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f.mutex.Lock()
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defer f.mutex.Unlock()
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for _, mp := range f.MountPoints {
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if mp.Device == pathname {
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return true, nil
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}
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}
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return false, nil
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}
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func (f *FakeMounter) PathIsDevice(pathname string) (bool, error) {
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return true, nil
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}
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func (f *FakeMounter) GetDeviceNameFromMount(mountPath, pluginDir string) (string, error) {
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return getDeviceNameFromMount(f, mountPath, pluginDir)
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}
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