linux-kernel - Re: [PATCHv2] selftests: net: devlink_port_split.py: skip test if no suitable device available

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Date:   Wed, 8 Mar 2023 22:37:41 +0800
From:   Po-Hsu Lin <po-hsu.lin@...onical.com>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        netdev@...r.kernel.org, idosch@...lanox.com,
        danieller@...lanox.com, petrm@...lanox.com, shuah@...nel.org,
        pabeni@...hat.com, kuba@...nel.org, edumazet@...gle.com,
        davem@...emloft.net
Subject: Re: [PATCHv2] selftests: net: devlink_port_split.py: skip test if no
 suitable device available

On Wed, Mar 8, 2023 at 7:41 PM Jiri Pirko <jiri@...nulli.us> wrote:
>
> Wed, Mar 08, 2023 at 11:21:57AM CET, po-hsu.lin@...onical.com wrote:
> >On Wed, Mar 8, 2023 at 5:31 PM Jiri Pirko <jiri@...nulli.us> wrote:
> >>
> >> Tue, Mar 07, 2023 at 04:00:30PM CET, po-hsu.lin@...onical.com wrote:
> >> >The `devlink -j port show` command output may not contain the "flavour"
> >> >key, an example from s390x LPAR with Ubuntu 22.10 (5.19.0-37-generic),
> >> >iproute2-5.15.0:
> >> >  {"port":{"pci/0001:00:00.0/1":{"type":"eth","netdev":"ens301"},
> >> >           "pci/0001:00:00.0/2":{"type":"eth","netdev":"ens301d1"},
> >> >           "pci/0002:00:00.0/1":{"type":"eth","netdev":"ens317"},
> >> >           "pci/0002:00:00.0/2":{"type":"eth","netdev":"ens317d1"}}}
> >>
> >> As Jakub wrote, this is odd. Could you debug if kernel sends the flavour
> >> attr and if not why? Also, could you try with most recent kernel?
> >
> >I did a quick check on another s390x LPAR instance which is running
> >with Ubuntu 23.04 (6.1.0-16-generic) iproute2-6.1.0, there is still no
> >"flavour" attribute.
> >$ devlink port show
> >pci/0001:00:00.0/1: type eth netdev ens301
> >pci/0001:00:00.0/2: type eth netdev ens301d1
> >pci/0002:00:00.0/1: type eth netdev ens317
> >pci/0002:00:00.0/2: type eth netdev ens317d1
> >
> >The behaviour didn't change with iproute2 built from source [1]
>
> Could you paste output of "devlink dev info"?
> Looks like something might be wrong in the kernel devlink/driver code.
>
The `devlink dev info` output is empty. The following output is from
that Ubuntu 23.04 s390x LPAR, run as root:
# devlink dev show
pci/0001:00:00.0
pci/0002:00:00.0
# devlink dev show pci/0001:00:00.0
pci/0001:00:00.0
# devlink dev info
# devlink dev info pci/0001:00:00.0
kernel answers: Operation not supported

>