agent/bindir/libvirtqemuhook.in

#!/usr/bin/python
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# to you under the Apache License, Version 2.0 (the
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# 
#   http://www.apache.org/licenses/LICENSE-2.0
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import sys
from xml.dom.minidom import parse
from cloudutils.configFileOps import configFileOps
from cloudutils.networkConfig import networkConfig
def isOldStyleBridge(brName):
    if brName.find("cloudVirBr") == 0:
       return True
    else:
       return False
def getGuestNetworkDevice():
    netlib = networkConfig() 
    cfo = configFileOps("/etc/cloudstack/agent/agent.properties")
    guestDev = cfo.getEntry("guest.network.device")
    enslavedDev = netlib.getEnslavedDev(guestDev, 1)
    return enslavedDev 
def handleMigrateBegin():
    try:
        domain = parse(sys.stdin)
        for interface in domain.getElementsByTagName("interface"):
            source = interface.getElementsByTagName("source")[0]
            bridge = source.getAttribute("bridge")
            if not isOldStyleBridge(bridge):
                continue
            vlanId = bridge.replace("cloudVirBr","")
            phyDev = getGuestNetworkDevice()
            newBrName="br" + phyDev + "-" + vlanId
            source.setAttribute("bridge", newBrName)
        print(domain.toxml())
    except:
        pass
if __name__ == '__main__':
    if len(sys.argv) != 5:
        sys.exit(0)

    if sys.argv[2] == "migrate" and sys.argv[3] == "begin":
        handleMigrateBegin()