示例#1
0
// utility to mount a disk based filesystem
func diskSetUp(manager diskManager, disk iscsiDisk, volPath string, mounter mount.Interface) error {
	globalPDPath := manager.MakeGlobalPDName(disk)
	// TODO: handle failed mounts here.
	mountpoint, err := mounter.IsMountPoint(volPath)

	if err != nil && !os.IsNotExist(err) {
		glog.Errorf("cannot validate mountpoint: %s", volPath)
		return err
	}
	if mountpoint {
		return nil
	}
	if err := manager.AttachDisk(disk); 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 disk.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
}
示例#2
0
// utility to tear down a disk based filesystem
func diskTearDown(manager diskManager, disk iscsiDisk, volPath string, mounter mount.Interface) error {
	mountpoint, err := mounter.IsMountPoint(volPath)
	if err != nil {
		glog.Errorf("cannot validate mountpoint %s", volPath)
		return err
	}
	if !mountpoint {
		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(disk, mntPath); err != nil {
			glog.Errorf("failed to detach disk from %s", mntPath)
			return err
		}
	}

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

}