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Below command is failing for FC HBA passthrough from baremetal
node(ubuntu 14.04.2 LTS 64 bit server) to nova virtual machines having
ubuntu:
virsh attach-device $VIRSH_NAME $fcoe

where $VIRSH_NAME is 'nova instance property named
OS-EXT-SRV-ATTR:instance_name  having value say instance-0000000b'

and $fcoe is a xml file having contents
"<hostdev mode='subsystem' type='pci' managed='yes'><source><address
domain='0x0000' bus='0x03' slot='0x00'
function='0x1'/></source></hostdev>"

Below is error which we are getting:

23:16:42 2015-07-31 06:16:41.741 | error: Failed to attach device from
/tmp/tmp.k66oiZC7eg_fcoe.xml
23:16:42 2015-07-31 06:16:41.744 | error: internal error: unable to
execute QEMU command 'device_add': Device initialization failed.


Same command is working in ubuntu 14.04.01.

below is difference in qemu packages in two versions of ubuntu:

http://paste.openstack.org/show/406571/
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