Golang Interface.IsLikelyNotMountPoint方法代码示例

// UnmountPath is a common unmount routine that unmounts the given path and
// deletes the remaining directory if successful.
func UnmountPath(mountPath string, mounter mount.Interface) error {
	if pathExists, pathErr := PathExists(mountPath); pathErr != nil {
		return fmt.Errorf("Error checking if path exists: %v", pathErr)
	} else if !pathExists {
		glog.Warningf("Warning: Unmount skipped because path does not exist: %v", mountPath)
		return nil
	}

	notMnt, err := mounter.IsLikelyNotMountPoint(mountPath)
	if err != nil {
		return err
	}
	if notMnt {
		glog.Warningf("Warning: %q is not a mountpoint, deleting", mountPath)
		return os.Remove(mountPath)
	}

	// Unmount the mount path
	if err := mounter.Unmount(mountPath); err != nil {
		return err
	}
	notMnt, mntErr := mounter.IsLikelyNotMountPoint(mountPath)
	if mntErr != nil {
		return err
	}
	if notMnt {
		glog.V(4).Info("%q is unmounted, deleting the directory", mountPath)
		return os.Remove(mountPath)
	}
	return nil
}

// utility to mount a disk based filesystem
func diskSetUp(manager diskManager, b iscsiDiskBuilder, volPath string, mounter mount.Interface) error {
	globalPDPath := manager.MakeGlobalPDName(*b.iscsiDisk)
	// TODO: handle failed mounts here.
	notMnt, err := mounter.IsLikelyNotMountPoint(volPath)

	if err != nil && !os.IsNotExist(err) {
		glog.Errorf("cannot validate mountpoint: %s", volPath)
		return err
	}
	if !notMnt {
		return nil
	}
	if err := manager.AttachDisk(b); err != nil {
		glog.Errorf("failed to attach disk")
		return err
	}

	if err := os.MkdirAll(volPath, 0750); err != nil {
		glog.Errorf("failed to mkdir:%s", volPath)
		return err
	}
	// Perform a bind mount to the full path to allow duplicate mounts of the same disk.
	options := []string{"bind"}
	if b.readOnly {
		options = append(options, "ro")
	}
	err = mounter.Mount(globalPDPath, volPath, "", options)
	if err != nil {
		glog.Errorf("failed to bind mount:%s", globalPDPath)
		return err
	}
	return nil
}

func (attacher *gcePersistentDiskAttacher) MountDevice(spec *volume.Spec, devicePath string, deviceMountPath string, mounter mount.Interface) error {
	// Only mount the PD globally once.
	notMnt, err := mounter.IsLikelyNotMountPoint(deviceMountPath)
	if err != nil {
		if os.IsNotExist(err) {
			if err := os.MkdirAll(deviceMountPath, 0750); err != nil {
				return err
			}
			notMnt = true
		} else {
			return err
		}
	}

	volumeSource, readOnly := getVolumeSource(spec)

	options := []string{}
	if readOnly {
		options = append(options, "ro")
	}
	if notMnt {
		diskMounter := &mount.SafeFormatAndMount{Interface: mounter, Runner: exec.New()}
		err = diskMounter.FormatAndMount(devicePath, deviceMountPath, volumeSource.FSType, options)
		if err != nil {
			os.Remove(deviceMountPath)
			return err
		}
	}
	return nil
}

// utility to tear down a disk based filesystem
func diskTearDown(manager diskManager, c iscsiDiskCleaner, volPath string, mounter mount.Interface) error {
	notMnt, err := mounter.IsLikelyNotMountPoint(volPath)
	if err != nil {
		glog.Errorf("cannot validate mountpoint %s", volPath)
		return err
	}
	if notMnt {
		return os.Remove(volPath)
	}

	refs, err := mount.GetMountRefs(mounter, volPath)
	if err != nil {
		glog.Errorf("failed to get reference count %s", volPath)
		return err
	}
	if err := mounter.Unmount(volPath); err != nil {
		glog.Errorf("failed to unmount %s", volPath)
		return err
	}
	// If len(refs) is 1, then all bind mounts have been removed, and the
	// remaining reference is the global mount. It is safe to detach.
	if len(refs) == 1 {
		mntPath := refs[0]
		if err := manager.DetachDisk(c, mntPath); err != nil {
			glog.Errorf("failed to detach disk from %s", mntPath)
			return err
		}
	}

	notMnt, mntErr := mounter.IsLikelyNotMountPoint(volPath)
	if mntErr != nil {
		glog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr)
		return err
	}
	if notMnt {
		if err := os.Remove(volPath); err != nil {
			return err
		}
	}
	return nil

}