From: "Robin Jarry" <rjarry@redhat.com>
To: "Stephen Hemminger" <stephen@networkplumber.org>,
"Morten Brørup" <mb@smartsharesystems.com>
Cc: <dev@dpdk.org>, "Sunil Kumar Kori" <skori@marvell.com>,
"Rakesh Kudurumalla" <rkudurumalla@marvell.com>,
"Vladimir Medvedkin" <vladimir.medvedkin@intel.com>,
"Wisam Jaddo" <wisamm@nvidia.com>,
"Cristian Dumitrescu" <cristian.dumitrescu@intel.com>,
"Konstantin Ananyev" <konstantin.v.ananyev@yandex.ru>,
"Akhil Goyal" <gakhil@marvell.com>,
"Fan Zhang" <fanzhang.oss@gmail.com>,
"Bruce Richardson" <bruce.richardson@intel.com>,
"Yipeng Wang" <yipeng1.wang@intel.com>,
"Sameh Gobriel" <sameh.gobriel@intel.com>,
"Nithin Dabilpuram" <ndabilpuram@marvell.com>,
"Kiran Kumar K" <kirankumark@marvell.com>,
"Satha Rao" <skoteshwar@marvell.com>,
"Harman Kalra" <hkalra@marvell.com>,
"Ankur Dwivedi" <adwivedi@marvell.com>,
"Anoob Joseph" <anoobj@marvell.com>,
"Tejasree Kondoj" <ktejasree@marvell.com>,
"Gagandeep Singh" <g.singh@nxp.com>,
"Hemant Agrawal" <hemant.agrawal@nxp.com>,
"Ajit Khaparde" <ajit.khaparde@broadcom.com>,
"Somnath Kotur" <somnath.kotur@broadcom.com>,
"Chas Williams" <chas3@att.com>,
"Min Hu (Connor)" <humin29@huawei.com>,
"Potnuri Bharat Teja" <bharat@chelsio.com>,
"Sachin Saxena" <sachin.saxena@nxp.com>,
"Ziyang Xuan" <xuanziyang2@huawei.com>,
"Xiaoyun Wang" <cloud.wangxiaoyun@huawei.com>,
"Jie Hai" <haijie1@huawei.com>,
"Yisen Zhuang" <yisen.zhuang@huawei.com>,
"Jingjing Wu" <jingjing.wu@intel.com>,
"Dariusz Sosnowski" <dsosnowski@nvidia.com>,
"Viacheslav Ovsiienko" <viacheslavo@nvidia.com>,
"Bing Zhao" <bingz@nvidia.com>, "Ori Kam" <orika@nvidia.com>,
"Suanming Mou" <suanmingm@nvidia.com>,
"Matan Azrad" <matan@nvidia.com>,
"Chaoyong He" <chaoyong.he@corigine.com>,
"Devendra Singh Rawat" <dsinghrawat@marvell.com>,
"Alok Prasad" <palok@marvell.com>,
"Andrew Rybchenko" <andrew.rybchenko@oktetlabs.ru>,
"Jiawen Wu" <jiawenwu@trustnetic.com>,
"Jian Wang" <jianwang@trustnetic.com>,
"Thomas Monjalon" <thomas@monjalon.net>,
"Ferruh Yigit" <ferruh.yigit@amd.com>,
"Jiayu Hu" <hujiayu.hu@foxmail.com>,
"Pavan Nikhilesh" <pbhagavatula@marvell.com>,
"Maxime Coquelin" <maxime.coquelin@redhat.com>,
"Chenbo Xia" <chenbox@nvidia.com>
Subject: Re: IPv6 APIs rework
Date: Thu, 18 Jul 2024 23:40:36 +0200 [thread overview]
Message-ID: <D2SZOWKB4T7E.2UNBM998K58P4@redhat.com> (raw)
In-Reply-To: <20240718141501.24a7c79c@hermes.local>
Stephen Hemminger, Jul 18, 2024 at 23:15:
> If you look at the standard netinet/in.h the storage of IPv6 addresses
> is in in6_addr. DPDK has always wanted to do its own thing...
>
> The in6_addr is a union with no explicit alignment.
>
> struct in6_addr
> {
> union
> {
> uint8_t __u6_addr8[16];
> uint16_t __u6_addr16[8];
> uint32_t __u6_addr32[4];
> } __in6_u;
>
> Better to not have explicit alignment and not have 64 bit value.
The main reason why I didn't use the standard POSIX type is that it has
an alignment of 4 which means it cannot always be mapped directly to
packets in memory depending on the encapsulating protocol.
Also, ip->__in6_u.__u6_addr8 is really ugly as a field name, even if
the "helper" macros (ip->s6_addr8) make them a bit better :)
What do you have against adding a 64 bit value in the union?
next prev parent reply other threads:[~2024-07-18 21:40 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-18 15:03 Robin Jarry
2024-07-18 20:27 ` Morten Brørup
2024-07-18 21:15 ` Stephen Hemminger
2024-07-18 21:40 ` Robin Jarry [this message]
2024-07-18 21:25 ` Vladimir Medvedkin
2024-07-18 21:34 ` Robin Jarry
2024-07-19 8:25 ` Konstantin Ananyev
2024-07-19 9:12 ` Morten Brørup
2024-07-19 10:02 ` Robin Jarry
2024-07-19 10:09 ` Bruce Richardson
2024-07-19 10:46 ` Morten Brørup
2024-07-19 11:09 ` Robin Jarry
2024-07-19 15:47 ` Morten Brørup
2024-07-19 17:07 ` Stephen Hemminger
2024-07-20 17:43 ` Robin Jarry
2024-07-20 20:26 ` Stephen Hemminger
2024-07-20 20:33 ` Robin Jarry
2024-07-21 16:12 ` Morten Brørup
2024-07-21 21:51 ` Robin Jarry
2024-07-22 9:31 ` Morten Brørup
2024-07-19 10:41 ` Medvedkin, Vladimir
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