For bionic, the provided test case needs some tweaks as the neutron
version on bionic does not have the provided functions. Instead, I've
written a quick test script that will exercise the pyroute2 code path to
exercise the errors. Still requires enabling vfs as James did.
Simple script is:
#!/usr/bin/python3
import pyroute2
ip = pyroute2.IPRoute()
devname = 'enp3s0f0'
link_idx = ip.link_lookup(ifname=devname)[0]
link = ip.link('get', index=link_idx, ext_mask=1)[0]
num_vfs = link.get_attr('IFLA_NUM_VF')
print(num_vfs)
Running test on bionic without this fix to prove its enough to show the error:
$ dpkg -l | grep python3-pyroute2
ii python3-pyroute2 0.4.21-0.1ubuntu2
all Python3 Netlink library
$ sudo ./lp1904730-test.py
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/pyroute2/netlink/__init__.py", line
1232, in _ft_decode_generic
self.decode_nlas(offset)
File "/usr/lib/python3/dist-packages/pyroute2/netlink/__init__.py", line
1357, in decode_nlas
offset)
struct.error: unpack_from requires a buffer of at least 4 bytes
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "./lp1904730-test.py", line 7, in <module>
link = ip.link('get', index=link_idx, ext_mask=1)[0]
File "/usr/lib/python3/dist-packages/pyroute2/iproute.py", line 1310, in link
msg_flags=msg_flags)
File "/usr/lib/python3/dist-packages/pyroute2/netlink/nlsocket.py", line 804,
in nlm_request
return do_try()
File "/usr/lib/python3/dist-packages/pyroute2/netlink/nlsocket.py", line 783,
in do_try
callback=callback)
File "/usr/lib/python3/dist-packages/pyroute2/netlink/nlsocket.py", line 648,
in get
raise msg['header']['error']
File "/usr/lib/python3/dist-packages/pyroute2/netlink/nlsocket.py", line 171,
in parse
msg.decode()
File "/usr/lib/python3/dist-packages/pyroute2/netlink/__init__.py", line 941,
in decode
self._ft_decode(self, offset)
File "/usr/lib/python3/dist-packages/pyroute2/netlink/__init__.py", line
1235, in _ft_decode_generic
raise NetlinkNLADecodeError(e)
pyroute2.netlink.exceptions.NetlinkNLADecodeError: unpack_from requires a
buffer of at least 4 bytes
Running with the proposed patch:
$ dpkg -l | grep python3-pyroute2
ii python3-pyroute2 0.4.21-0.1ubuntu2.1
all Python3 Netlink library
$ sudo ./lp1904730-test.py
63
** Tags removed: verification-needed
** Tags added: verification-done verification-done-bionic
** Tags removed: verification-needed-bionic
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https://bugs.launchpad.net/bugs/1904730
Title:
neutron-agent-sriov fails to create port
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