netdev - Re: [PATCH net-next 2/2] selftests: openvswitch: set value to nla flags

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Date: Fri, 14 Jun 2024 11:54:11 -0400
From: Aaron Conole <aconole@...hat.com>
To: Adrián Moreno <amorenoz@...hat.com>
Cc: netdev@...r.kernel.org,  Pravin B Shelar <pshelar@....org>,  "David S.
 Miller" <davem@...emloft.net>,  Eric Dumazet <edumazet@...gle.com>,  Jakub
 Kicinski <kuba@...nel.org>,  Paolo Abeni <pabeni@...hat.com>,  Shuah Khan
 <shuah@...nel.org>,  dev@...nvswitch.org,
  linux-kselftest@...r.kernel.org,  linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 2/2] selftests: openvswitch: set value to nla
 flags

Adrián Moreno <amorenoz@...hat.com> writes:

> On Mon, Jun 03, 2024 at 03:02:46PM GMT, Aaron Conole wrote:
>> Adrian Moreno <amorenoz@...hat.com> writes:
>>
>> > Netlink flags, although they don't have payload at the netlink level,
>> > are represented as having a "True" value in pyroute2.
>> >
>> > Without it, trying to add a flow with a flag-type action (e.g: pop_vlan)
>> > fails with the following traceback:
>> >
>> > Traceback (most recent call last):
>> >   File "[...]/ovs-dpctl.py", line 2498, in <module>
>> >     sys.exit(main(sys.argv))
>> >              ^^^^^^^^^^^^^^
>> >   File "[...]/ovs-dpctl.py", line 2487, in main
>> >     ovsflow.add_flow(rep["dpifindex"], flow)
>> >   File "[...]/ovs-dpctl.py", line 2136, in add_flow
>> >     reply = self.nlm_request(
>> >             ^^^^^^^^^^^^^^^^^
>> >   File "[...]/pyroute2/netlink/nlsocket.py", line 822, in nlm_request
>> >     return tuple(self._genlm_request(*argv, **kwarg))
>> >                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>> >   File "[...]/pyroute2/netlink/generic/__init__.py", line 126, in
>> > nlm_request
>> >     return tuple(super().nlm_request(*argv, **kwarg))
>> >            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>> >   File "[...]/pyroute2/netlink/nlsocket.py", line 1124, in nlm_request
>> >     self.put(msg, msg_type, msg_flags, msg_seq=msg_seq)
>> >   File "[...]/pyroute2/netlink/nlsocket.py", line 389, in put
>> >     self.sendto_gate(msg, addr)
>> >   File "[...]/pyroute2/netlink/nlsocket.py", line 1056, in sendto_gate
>> >     msg.encode()
>> >   File "[...]/pyroute2/netlink/__init__.py", line 1245, in encode
>> >     offset = self.encode_nlas(offset)
>> >              ^^^^^^^^^^^^^^^^^^^^^^^^
>> >   File "[...]/pyroute2/netlink/__init__.py", line 1560, in encode_nlas
>> >     nla_instance.setvalue(cell[1])
>> >   File "[...]/pyroute2/netlink/__init__.py", line 1265, in setvalue
>> >     nlv.setvalue(nla_tuple[1])
>> >                  ~~~~~~~~~^^^
>> > IndexError: list index out of range
>> >
>> > Signed-off-by: Adrian Moreno <amorenoz@...hat.com>
>> > ---
>>
>> Acked-by: Aaron Conole <aconole@...hat.com>
>>
>> I don't know which pyroute2 version I had used when I tested this
>> previously, but even on my current system I get this error now.  Thanks
>> for the fix.
>>
>
> Thanks Aaron. I'll resend as v2 with your ack as a stand-alone patch
> since the other patch of this series will be fixed by your soon-to-come
> series.

Thanks!

>> >  tools/testing/selftests/net/openvswitch/ovs-dpctl.py | 2 +-
>> >  1 file changed, 1 insertion(+), 1 deletion(-)
>> >
>> > diff --git a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py
>> > index b76907ac0092..a2395c3f37a1 100644
>> > --- a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py
>> > +++ b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py
>> > @@ -537,7 +537,7 @@ class ovsactions(nla):
>> >              for flat_act in parse_flat_map:
>> >                  if parse_starts_block(actstr, flat_act[0], False):
>> >                      actstr = actstr[len(flat_act[0]):]
>> > -                    self["attrs"].append([flat_act[1]])
>> > +                    self["attrs"].append([flat_act[1], True])
>> >                      actstr = actstr[strspn(actstr, ", ") :]
>> >                      parsed = True
>>