netdev - Re: [PATCH iproute2-next v3 2/2] tc: implement support for terse dump

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Date:   Fri, 16 Oct 2020 19:42:40 +0300
From:   Vlad Buslov <vlad@...lov.dev>
To:     Jamal Hadi Salim <jhs@...atatu.com>
Cc:     Vlad Buslov <vladbu@...dia.com>, dsahern@...il.com,
        stephen@...workplumber.org, netdev@...r.kernel.org,
        davem@...emloft.net, xiyou.wangcong@...il.com, jiri@...nulli.us,
        ivecera@...hat.com, Vlad Buslov <vladbu@...lanox.com>
Subject: Re: [PATCH iproute2-next v3 2/2] tc: implement support for terse dump


On Fri 16 Oct 2020 at 19:07, Jamal Hadi Salim <jhs@...atatu.com> wrote:
> On 2020-10-16 10:42 a.m., Vlad Buslov wrote:
>> From: Vlad Buslov <vladbu@...lanox.com>
>>
>> Implement support for classifier/action terse dump using new TCA_DUMP_FLAGS
>> tlv with only available flag value TCA_DUMP_FLAGS_TERSE. Set the flag when
>> user requested it with following example CLI (-br for 'brief'):
>>
>> $ tc -s -brief filter show dev ens1f0 ingress
>> filter protocol all pref 49151 flower chain 0
>> filter protocol all pref 49151 flower chain 0 handle 0x1
>>    not_in_hw
>>          action order 1:         Action statistics:
>>          Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>>          backlog 0b 0p requeues 0
>>
>> filter protocol all pref 49152 flower chain 0
>> filter protocol all pref 49152 flower chain 0 handle 0x1
>>    not_in_hw
>>          action order 1:         Action statistics:
>>          Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>>          backlog 0b 0p requeues 0
>>
>
> Should the action name at least show up?
>
>
> cheers,
> jamal

All action print callbacks have arg==NULL check and return at the
beginning. To print action type we need either to have dedicated
'brief_dump' callback instead of reusing print_aop() or extend/refactor
print_aop() implementation for all actions to always print the type
before checking the arg. What do you suggest?