[Kimchi-devel] [PATCH v2 2/3] Support creating vlan tagged virtual network

[Aline Manera]

Reviewed-by: Aline Manera <alinefm at linux.vnet.ibm.com>

On 01/03/2014 05:15 AM, Mark Wu wrote:
> It creates a vlan interface on top of the given nic or bond interface,
> and bridge the vlan interface to a new created bridge, which is used to
> forward VM's traffic. So all packets transmitted from VM will be tagged
> before it departs from the physical network interface.
>
> Signed-off-by: Mark Wu <wudxw at linux.vnet.ibm.com>
> ---
>   src/kimchi/API.json |  6 ++++++
>   src/kimchi/model.py | 47 ++++++++++++++++++++++++++++++++++++++++++++---
>   2 files changed, 50 insertions(+), 3 deletions(-)
>
> diff --git a/src/kimchi/API.json b/src/kimchi/API.json
> index 7b90826..82d9e43 100644
> --- a/src/kimchi/API.json
> +++ b/src/kimchi/API.json
> @@ -56,6 +56,12 @@
>                   "interface": {
>                       "description": "The name of a network interface on the host",
>                       "type": "string"
> +                },
> +                "vlan_id": {
> +                    "description": "Network's VLAN ID",
> +                    "type": "integer",
> +                    "maximum": 4094,
> +                    "minimum": 1
>                   }
>               }
>           },
> diff --git a/src/kimchi/model.py b/src/kimchi/model.py
> index a6790b8..a8bcbef 100644
> --- a/src/kimchi/model.py
> +++ b/src/kimchi/model.py
> @@ -58,6 +58,7 @@ from kimchi import config
>   from kimchi import isoinfo
>   from kimchi import netinfo
>   from kimchi import network as knetwork
> +from kimchi import networkxml
>   from kimchi import vnc
>   from kimchi import xmlutils
>   from kimchi.asynctask import AsyncTask
> @@ -65,7 +66,6 @@ from kimchi.distroloader import DistroLoader
>   from kimchi.exception import InvalidOperation, InvalidParameter, MissingParameter
>   from kimchi.exception import NotFoundError, OperationFailed
>   from kimchi.featuretests import FeatureTests
> -from kimchi.networkxml import to_network_xml
>   from kimchi.objectstore import ObjectStore
>   from kimchi.scan import Scanner
>   from kimchi.screenshot import VMScreenshot
> @@ -806,7 +806,12 @@ class Model(object):
>           if netinfo.is_bridge(iface):
>               params['bridge'] = iface
>           elif netinfo.is_bare_nic(iface) or netinfo.is_bonding(iface):
> -            params['forward']['dev'] = iface
> +            if params.get('vlan_id') is None:
> +                params['forward']['dev'] = iface
> +            else:
> +                params['bridge'] = \
> +                    self._create_vlan_tagged_bridge(str(iface),
> +                                                    str(params['vlan_id']))
>           else:
>               raise InvalidParameter("the interface should be bare nic, "
>                                      "bonding or bridge device.")
> @@ -830,7 +835,7 @@ class Model(object):
>           if connection == 'bridge':
>               self._set_network_bridge(params)
>
> -        xml = to_network_xml(**params)
> +        xml = networkxml.to_network_xml(**params)
>
>           try:
>               network = conn.networkDefineXML(xml)
> @@ -888,8 +893,44 @@ class Model(object):
>           if network.isActive():
>               raise InvalidOperation(
>                   "Unable to delete the active network %s" % name)
> +        self._remove_vlan_tagged_bridge(network)
>           network.undefine()
>
> +    def _get_vlan_tagged_bridge_name(self, interface, vlan_id):
> +        return '-'.join(('kimchi', interface, vlan_id))
> +
> +    def _is_vlan_tagged_bridge(self, bridge):
> +        return  bridge.startswith('kimchi-')
> +
> +    def _create_vlan_tagged_bridge(self, interface, vlan_id):
> +        br_name = self._get_vlan_tagged_bridge_name(interface, vlan_id)
> +        br_xml = networkxml.create_vlan_tagged_bridge_xml(br_name, interface,
> +                                                          vlan_id)
> +        conn = self.conn.get()
> +        conn.changeBegin()
> +        try:
> +            vlan_tagged_br = conn.interfaceDefineXML(br_xml)
> +            vlan_tagged_br.create()
> +        except libvirt.libvirtError as e:
> +            conn.changeRollback()
> +            raise OperationFailed(e.message)
> +        else:
> +            conn.changeCommit()
> +            return br_name
> +
> +    def _remove_vlan_tagged_bridge(self, network):
> +        try:
> +            bridge = network.bridgeName()
> +        except libvirt.libvirtError:
> +            pass
> +        else:
> +            if self._is_vlan_tagged_bridge(bridge):
> +                conn = self.conn.get()
> +                iface = conn.interfaceLookupByName(bridge)
> +                if iface.isActive():
> +                    iface.destroy()
> +                iface.undefine()
> +
>       def add_task(self, target_uri, fn, opaque=None):
>           id = self.next_taskid
>           self.next_taskid = self.next_taskid + 1