func (util *ISCSIUtil) DetachDisk(iscsi iscsiDisk, mntPath string) error {
device, cnt, err := mount.GetDeviceNameFromMount(iscsi.mounter, mntPath)
if err != nil {
glog.Errorf("iscsi detach disk: failed to get device from mnt: %s\nError: %v", mntPath, err)
return err
}
if err = iscsi.mounter.Unmount(mntPath); err != nil {
glog.Errorf("iscsi detach disk: failed to unmount: %s\nError: %v", mntPath, err)
return err
}
cnt--
// if device is no longer used, see if need to logout the target
if cnt == 0 {
// strip -lun- from device path
ind := strings.LastIndex(device, "-lun-")
prefix := device[:(ind - 1)]
refCount, err := getDevicePrefixRefCount(iscsi.mounter, prefix)
if err == nil && refCount == 0 {
// this portal/iqn are no longer referenced, log out
// extract portal and iqn from device path
ind1 := strings.LastIndex(device, "-iscsi-")
portal := device[(len("/dev/disk/by-path/ip-")):ind1]
iqn := device[ind1+len("-iscsi-") : ind]
glog.Infof("iscsi: log out target %s iqn %s", portal, iqn)
_, err = iscsi.plugin.execCommand("iscsiadm", []string{"-m", "node", "-p", portal, "-T", iqn, "--logout"})
if err != nil {
glog.Errorf("iscsi: failed to detach disk Error: %v", err)
}
}
}
return nil
}
func (util *RBDUtil) DetachDisk(rbd rbd, mntPath string) error {
device, cnt, err := mount.GetDeviceNameFromMount(rbd.mounter, mntPath)
if err != nil {
return fmt.Errorf("rbd detach disk: failed to get device from mnt: %s\nError: %v", mntPath, err)
}
if err = rbd.mounter.Unmount(mntPath); err != nil {
return fmt.Errorf("rbd detach disk: failed to umount: %s\nError: %v", mntPath, err)
}
// if device is no longer used, see if can unmap
if cnt <= 1 {
// rbd unmap
_, err = rbd.plugin.execCommand("rbd", []string{"unmap", device})
if err != nil {
return fmt.Errorf("rbd: failed to unmap device %s:Error: %v", device, err)
}
glog.Infof("rbd: successfully unmap device %s", device)
}
return nil
}