network module: add support for getting dracut arguments

pyanaconda/modules/network/ifcfg.py

@@ -421,3 +421,105 @@ def update_slaves_onboot_value(master_devname, onboot, root_path="", uuid=None):
  updated_devices.append(slave)
 
  return updated_devices
+
+
+def get_dracut_arguments_from_ifcfg(iface, target_ip, hostname):
+ """Get dracut arguments for the iface and iSCSI target.
+
+ The dracut arguments would activate the iface in initramfs so that the
+ iSCSI target can be attached (for example to mount root filesystem).
+
+ :param iface: network interface used to connect to the target
+ :type iface: str
+ :param target_ip: IP of the iSCSI target
+ :type target_ip: str
+ :param hostname: static hostname to be configured
+ :type hostname: str
+ """
+ netargs = []
+ ifcfg = get_ifcfg_file_of_device(iface)
+ if not ifcfg:
+ log.error("get dracut arguments from ifcfg for %s: no ifcfg file found", iface)
+ return netargs
+
+ if ifcfg.get('BOOTPROTO') == 'ibft':
+ netargs.add("rd.iscsi.ibft")
+ elif target_ip:
+ if hostname is None:
+ hostname = ""
+ # if using ipv6
+ if ':' in target_ip:
+ if ifcfg.get('DHCPV6C') == "yes":
+ # XXX combination with autoconf not yet clear,
+ # support for dhcpv6 is not yet implemented in NM/ifcfg-rh
+ netargs.add("ip=%s:dhcp6" % iface)
+ elif ifcfg.get('IPV6_AUTOCONF') == "yes":
+ netargs.add("ip=%s:auto6" % iface)
+ elif ifcfg.get('IPV6ADDR'):
+ ipaddr = "[%s]" % ifcfg.get('IPV6ADDR')
+ if ifcfg.get('IPV6_DEFAULTGW'):
+ gateway = "[%s]" % ifcfg.get('IPV6_DEFAULTGW')
+ else:
+ gateway = ""
+ netargs.add("ip=%s::%s::%s:%s:none" % (ipaddr, gateway,
+ hostname, iface))
+ else:
+ if util.lowerASCII(ifcfg.get('bootproto')) == 'dhcp':
+ netargs.add("ip=%s:dhcp" % iface)
+ else:
+ cfgidx = ''
+ if ifcfg.get('IPADDR0'):
+ cfgidx = '0'
+ if ifcfg.get('GATEWAY%s' % cfgidx):
+ gateway = ifcfg.get('GATEWAY%s' % cfgidx)
+ else:
+ gateway = ""
+ netmask = ifcfg.get('NETMASK%s' % cfgidx)
+ prefix = ifcfg.get('PREFIX%s' % cfgidx)
+ if not netmask and prefix:
+ netmask = prefix2netmask(int(prefix))
+ ipaddr = ifcfg.get('IPADDR%s' % cfgidx)
+ netargs.add("ip=%s::%s:%s:%s:%s:none" %
+ (ipaddr, gateway, netmask, hostname, iface))
+
+ hwaddr = ifcfg.get("HWADDR")
+ if hwaddr:
+ netargs.add("ifname=%s:%s" % (iface, hwaddr.lower()))
+
+ if ifcfg.get("TYPE") == "Team" or ifcfg.get("DEVICETYPE") == "Team":
+ slaves = get_slaves_from_ifcfgs("TEAM_MASTER", [iface, ifcfg.get("UUID")])
+ netargs.add("team=%s:%s" % (iface,
+ ",".join(s_iface for s_iface, _uuid in slaves)))
+
+ if ifcfg.get("TYPE") == "Vlan":
+ physdev_spec = ifcfg.get("PHYSDEV")
+ physdev = None
+ # physical device can be specified by connection uuid (eg from nm-c-e)
+ if len(physdev_spec) == 36:
+ ifcfg = get_ifcfg_file([("UUID", physdev_spec)])
+ if ifcfg:
+ # On s390 with net.ifnames=0 there is no DEVICE
+ physdev = ifcfg.get("DEVICE") or ifcfg.get("NAME")
+ else:
+ ifcfg = get_ifcfg_file_of_device(physdev_spec)
+ if ifcfg:
+ physdev = physdev_spec
+ if physdev:
+ netargs.add("vlan=%s:%s" % (iface, physdev))
+ else:
+ log.error("can't find ifcfg of parent of vlan device %s specified by %s",
+ iface, physdev_spec)
+ return netargs
+
+ # For vlan ifcfg now refers to the physical device file
+ nettype = ifcfg.get("NETTYPE")
+ subchannels = ifcfg.get("SUBCHANNELS")
+ if is_s390() and nettype and subchannels:
+ znet = "rd.znet=%s,%s" % (nettype, subchannels)
+ options = ifcfg.get("OPTIONS").strip("'\"")
+ if options:
+ options = filter(lambda x: x != '', options.split(' '))
+ znet += ",%s" % (','.join(options))
+ netargs.add(znet)
+
+ return netargs

pyanaconda/modules/network/network.py

@@ -35,7 +35,7 @@
  add_connection_from_ksdata, update_connection_from_ksdata, ensure_active_connection_for_device, \
  update_iface_setting_values, bound_hwaddr_of_device, devices_ignore_ipv6
 from pyanaconda.modules.network.ifcfg import get_ifcfg_file_of_device, update_onboot_value, \
- update_slaves_onboot_value, find_ifcfg_uuid_of_device
+ update_slaves_onboot_value, find_ifcfg_uuid_of_device, get_dracut_arguments_from_ifcfg
 from pyanaconda.modules.network.installation import NetworkInstallationTask
 from pyanaconda.modules.network.utils import get_default_route_iface
 
@@ -617,3 +617,21 @@ def network_device_configuration_changed(self):
  if not self._device_configurations:
  log.error("Got request to use DeviceConfigurations that has not been created yet")
  self._use_device_configurations = True
+
+ def get_dracut_arguments(self, iface, target_ip, hostname):
+ """Get dracut arguments for the iface and iSCSI target.
+
+ The dracut arguments would activate the iface in initramfs so that the
+ iSCSI target can be attached (for example to mount root filesystem).
+
+ :param iface: network interface used to connect to the target
+ :param target_ip: IP of the iSCSI target
+ :param hostname: static hostname to be configured
+ """
+ dracut_args = []
+
+ if iface not in (device.get_iface() for device in self.nm_client.get_devices()):
+ log.error("get dracut argumetns for %s: device not found", iface)
+ return dracut_args
+
+ return get_dracut_arguments_from_ifcfg(iface, target_ip, hostname)

pyanaconda/modules/network/network_interface.py

@@ -211,3 +211,15 @@ def NetworkDeviceConfigurationChanged(self):
  from persistent configuration instead of using original kickstart data.
  """
  return self.implementation.network_device_configuration_changed()
+
+ def GetDracutArguments(self, iface: Str, target_ip: Str, hostname: Str) -> List[Str]:
+ """Get dracut arguments for the iface and iSCSI target.
+
+ The dracut arguments would activate the iface in initramfs so that the
+ iSCSI target can be attached (for example to mount root filesystem).
+
+ :param iface: network interface used to connect to the target
+ :param target_ip: IP of the iSCSI target
+ :param hostname: static hostname to be configured
+ """
+ return self.implementation.get_dracut_arguments(iface, target_ip, hostname)