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

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Date:   Fri, 10 Mar 2023 09:32:39 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     Po-Hsu Lin <po-hsu.lin@...onical.com>
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

Thu, Mar 09, 2023 at 04:44:10PM CET, po-hsu.lin@...onical.com wrote:
>On Thu, Mar 9, 2023 at 2:24 AM Jiri Pirko <jiri@...nulli.us> wrote:
>>
>> Wed, Mar 08, 2023 at 03:37:41PM CET, po-hsu.lin@...onical.com wrote:
>> >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
>>
>> Interesting, could you try ethtool -i to get the driver name?
>>
>Hi,
>
>Here you go:
>$ ethtool -i ens301
>driver: mlx4_en
>version: 4.0-0
>firmware-version: 2.35.5100
>expansion-rom-version:
>bus-info: 0001:00:00.0
>supports-statistics: yes
>supports-test: yes
>supports-eeprom-access: no
>supports-register-dump: no
>supports-priv-flags: yes
>
>$ ethtool -i ens317
>driver: mlx4_en

mlx4 is indeed not setting attrs. So you patch is needed.


>version: 4.0-0
>firmware-version: 2.35.5100
>expansion-rom-version:
>bus-info: 0002:00:00.0
>supports-statistics: yes
>supports-test: yes
>supports-eeprom-access: no
>supports-register-dump: no
>supports-priv-flags: yes
>
>HTH
>
>
>>
>> >kernel answers: Operation not supported
>> >
>> >>