TL;DR:
- test needs no change to filter
- did this work ever before (happend on 3.6 as well for me)?
- if you retest use >= 4.0.0-1ubuntu6
- did you see bad file descriptor messages, does it help you to see what we
need?
After checking the default rules, the only thing your case adds tothe default
"clean-traffic" rule is:
<filterref filter="no-other-l2-traffic" />
This statement was in there by default on older versions IIRC.
But I realized this isn't needed - the default works as well to trigger the
issue.
And on the guest the interface gets
<filterref filter='clean-traffic'>
<parameter name='CTRL_IP_LEARNING' value='dhcp'/>
</filterref>
That guest change is enough to trigger the reported error.
I can trigger the same on 3.6.0-1ubuntu6.2 btw did this work for you in former
releases or is this a new test?
This is interesting as the offending patch your fix is referring to lists 3.9
Did you see that message when you trigger the issue?
libvirtd[3593]: Warning: Kernel filter failed: Bad file descriptor
libvirtd[3593]: 2018-03-22 12:59:59.774+0000: 13506: error :
virNWFilterSnoopDHCPOpen:1133 : internal error: pcap_setfilter: can't remove
kernel filter: Bad file descriptor
Maybe that helps you to spot the right fix?
I can at least help you with the build issues.
I have realized your test is rather old 2018-02-28
I have packaged quite a lot of stable fixes in the meantime.
This does - among others - container the patch you referred to.
So if you retest with libvirt >= 4.0.0-1ubuntu6 you have the requested change.
Unfortunately in my sniff test this didn't help - but then I never used that in
my environment, maybe it is good in your which might be prepared for this
functionality.
Incomplete until retested with the version containing the suggested fix.
** Changed in: libvirt (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1758037
Title:
LTC Test- Ubuntu18.04: Starting the guest with network filter defined
will fail with "cause is unknown".
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