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Description of problem:
Can not edit alias name for vsock device

Version-Release number of selected component (if applicable):
libvirt-4.5.0-2.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1.Add a vsock device with alias name and save the xml:
#virsh edit iommu1
 <vsock model='virtio'>
      <cid auto='no' address='3'/>
      <alias name='ua-04c33ecd-4e33-4023-84de-a2205c777asdfdsf'/>
      <address type='pci' domain='0x0000' bus='0x09' slot='0x00' function='0x0'/>
    </vsock>
# virsh edit iommu1
error: XML document failed to validate against schema: Unable to validate doc against /usr/share/libvirt/schemas/domain.rng
Extra element devices in interleave
Element domain failed to validate content

Failed. Try again? [y,n,i,f,?]: 


2.Check the rng file:
#cat /usr/share/libvirt/schemas/domaincommon.rng
no alias name for vsock device

3.

Actual results:
Can not edit alias name for vsock device

Expected results:
Can edit alias name fro vsock device

Additional info:

Patch: https://www.redhat.com/archives/libvir-list/2018-July/msg00739.html

Patch accepted:
commit c03d36b91d62890b376a2ff8f9d65fac069dce42 (HEAD -> master)
Author: Han Han <hhan>
Date:   Thu Jul 12 14:28:17 2018 +0800

    docs: schema: Add missing <alias> to vsock device
    
    Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1600345
    
    Signed-off-by: Han Han <hhan>
    Reviewed-by: Erik Skultety <eskultet>


Change to post status.

Verified with libvirt-4.5.0-3.el7.x86_64.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2018:3113