docs: def _set_zfcp_config_files(self, fcp, target_wwpn, target_lun):
          """sles set WWPN and LUN in configuration files"""
          device = '0.0.%s' % fcp
          # host config
          host_config = '/sbin/zfcp_host_configure %s 1' % device
          # disk config
          disk_config = '/sbin/zfcp_disk_configure ' +\
                        '%(device)s %(wwpn)s %(lun)s 1' %\
                        {'device': device, 'wwpn': target_wwpn,
                         'lun': target_lun}
          create_config = 'touch /etc/udev/rules.d/51-zfcp-%s.rules' % device
          # check if the file already contains the zFCP channel
          check_channel = ('out=`cat "/etc/udev/rules.d/51-zfcp-%s.rules" '
                           '| egrep -i "ccw/%s]online"`\n' % (device, device))
          check_channel += 'if [[ ! $out ]]; then\n'
          check_channel += ('  echo "ACTION==\\"add\\", SUBSYSTEM==\\"ccw\\", '
                            'KERNEL==\\"%(device)s\\", IMPORT{program}=\\"'
                            'collect %(device)s %%k %(device)s zfcp\\""'
                            '| tee -a /etc/udev/rules.d/51-zfcp-%(device)s.rules'
                            '\n' % {'device': device})
          check_channel += ('  echo "ACTION==\\"add\\", SUBSYSTEM==\\"drivers\\"'
                            ', KERNEL==\\"zfcp\\", IMPORT{program}=\\"'
                            'collect %(device)s %%k %(device)s zfcp\\""'
                            '| tee -a /etc/udev/rules.d/51-zfcp-%(device)s.rules'
                            '\n' % {'device': device})
          check_channel += ('  echo "ACTION==\\"add\\", '
                            'ENV{COLLECT_%(device)s}==\\"0\\", '
                            'ATTR{[ccw/%(device)s]online}=\\"1\\""'
                            '| tee -a /etc/udev/rules.d/51-zfcp-%(device)s.rules'
                            '\n' % {'device': device})
          check_channel += 'fi\n'
          check_channel += ('echo "ACTION==\\"add\\", KERNEL==\\"rport-*\\", '
                            'ATTR{port_name}==\\"%(wwpn)s\\", '
                            'SUBSYSTEMS==\\"ccw\\", KERNELS==\\"%(device)s\\",'
                            'ATTR{[ccw/%(device)s]%(wwpn)s/unit_add}='
                            '\\"%(lun)s\\""'
                            '| tee -a /etc/udev/rules.d/51-zfcp-%(device)s.rules'
                            '\n' % {'device': device, 'wwpn': target_wwpn,
                                    'lun': target_lun})
          return '\n'.join((host_config,
                            'sleep 2',
                            disk_config,
                            'sleep 2',
                            create_config,
                            check_channel))