netdev - Re: tc: Using u32 filter

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Message-ID: <5867d6f3-d4fc-0b04-2ea6-ee0a2f8afa8b@synopsys.com>
Date:   Fri, 27 Apr 2018 16:56:23 +0100
From:   Jose Abreu <Jose.Abreu@...opsys.com>
To:     Jiri Pirko <jiri@...nulli.us>, Jose Abreu <Jose.Abreu@...opsys.com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Joao Pinto <Joao.Pinto@...opsys.com>
Subject: Re: tc: Using u32 filter

On 27-04-2018 16:04, Jiri Pirko wrote:
> Fri, Apr 27, 2018 at 04:15:46PM CEST, Jose.Abreu@...opsys.com wrote:
>> Hi,
>>
>> I'm trying to use u32 filter to filter specific fields of packets
>> by HW *only* but I'm having a hard time in trying to run tc to
>> configure it.
>> I implemented a dummy .ndo_setup_tc callback which always returns
>> success and I set NETIF_F_HW_TC field in hw_features. Then I run
> Did you register a block cb?

Yeah, I was missing that. Its working now :D Thanks Jiri!

Best Regards,
Jose Miguel Abreu

>
>> tc, like this:
>>
>>    # tc filter add dev eth0 u32 skip_sw sample u32 20 ffff at 0
>>
>> At this stage I'm not really caring about the packet content (the
>> "20 ffff at 0"), I just want to see the configuration reaching my
>> driver but I'm getting a "RTNETLINK answers: Operation not
>> supported" error.
>>
>> Can you tell me what I'm I doing wrong?
>>
>> Thanks and Best Regards,
>> Jose Miguel Abreu