From mboxrd@z Thu Jan  1 00:00:00 1970
From: Olivier MATZ <olivier.matz-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
Subject: Re: [PATCH v5 2/3] mbuf:add three TX ol_flags and
 repalce PKT_TX_VXLAN_CKSUM
Date: Thu, 04 Dec 2014 14:47:38 +0100
Message-ID: <548065FA.6040105@6wind.com>
References: <1417532767-1309-1-git-send-email-jijiang.liu@intel.com>
 <1417532767-1309-3-git-send-email-jijiang.liu@intel.com>
 <547EF6E9.5040000@6wind.com>
 <2601191342CEEE43887BDE71AB977258213BC46D@IRSMSX105.ger.corp.intel.com>
 <547F211B.3040905@6wind.com>
 <F35DEAC7BCE34641BA9FAC6BCA4A12E70A7CE4A7@SHSMSX104.ccr.corp.intel.com>
 <2601191342CEEE43887BDE71AB977258213BC6D5@IRSMSX105.ger.corp.intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
To: "Ananyev, Konstantin" <konstantin.ananyev-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
 "Zhang, Helin" <helin.zhang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
 "Liu, Jijiang" <jijiang.liu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>, "dev-VfR2kkLFssw@public.gmane.org" <dev-VfR2kkLFssw@public.gmane.org>
Return-path: <dev-bounces-VfR2kkLFssw@public.gmane.org>
In-Reply-To: <2601191342CEEE43887BDE71AB977258213BC6D5-kPTMFJFq+rEu0RiL9chJVbfspsVTdybXVpNB7YpNyf8@public.gmane.org>
List-Id: patches and discussions about DPDK <dev.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/dev>,
 <mailto:dev-request-VfR2kkLFssw@public.gmane.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev-VfR2kkLFssw@public.gmane.org>
List-Help: <mailto:dev-request-VfR2kkLFssw@public.gmane.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request-VfR2kkLFssw@public.gmane.org?subject=subscribe>
Errors-To: dev-bounces-VfR2kkLFssw@public.gmane.org
Sender: "dev" <dev-bounces-VfR2kkLFssw@public.gmane.org>

Hi,

On 12/04/2014 11:19 AM, Ananyev, Konstantin wrote:
>>> 1/ (Jijiang's patch)
>>> PKT_TX_IP_CKSUM  /* packet is IPv4, and we want hw cksum */
>>> PKT_TX_IPV6      /* packet is IPv6 */
>>> PKT_TX_IPV4      /* packet is IPv4, and we don't want hw cksum */
>>>
>>> with PKT_TX_IP_CKSUM and PKT_TX_IPV4 exclusive
>>>
>>> and
>>>
>>> 2/
>>> PKT_TX_IP_CKSUM  /* we want hw IP cksum */
>>> PKT_TX_IPV6      /* packet is IPv6 */
>>> PKT_TX_IPV4      /* packet is IPv4 */
>> There is another bit flag named 'PKT_TX_IPV4_CSUM' which uses the
>> same bit of 'PKT_TX_IP_CSUM'. It is for identifying if ipv4 hardware
>> checksum offload is needed or not.
>
> Yes, 'PKT_TX_IPV4_CSUM is an alias to PKT_TX_IP_CKSUM  and we are going to remove it.
>
>> It seems that we do not need 'PKT_TX_IPV6_CSUM'.
>
> No one even planned it.
>
>> 'PKT_TX_IPV4' and 'PKT_TX_IPV6' just indicates its packet type, and I guess
>> other features should not be contained in it, according to its name.
>>
>> So here I got the option 3:
>> PKT_TX_IPV4_CKSUM  /* we want hw IPv4 cksum */
>> PKT_TX_IPV6      /* packet is IPv6 */
>> PKT_TX_IPV4      /* packet is IPv4 */
>
> Hmm, and how this is different from what we have now in the Jijiang's patch?
> Except that you renamed PKT_TX_IP_CKSUM to PKT_TX_IPV4_CKSUM?

I think it's more like solution 2 with a renaming. And it is more
coherent to always have "IPV4" on all flag names.

Regards,
Olivier