From: Thomas Monjalon <thomas@monjalon.net>
To: Ferruh Yigit <ferruh.yigit@intel.com>,
Jerin Jacob <jerin.jacob@caviumnetworks.com>,
Andrew Rybchenko <arybchenko@solarflare.com>
Cc: Wenzhuo Lu <wenzhuo.lu@intel.com>,
Jingjing Wu <jingjing.wu@intel.com>,
Bernard Iremonger <bernard.iremonger@intel.com>,
John McNamara <john.mcnamara@intel.com>,
Marko Kovacevic <marko.kovacevic@intel.com>,
Olivier Matz <olivier.matz@6wind.com>,
dev@dpdk.org, shahafs@mellanox.com, "Ananyev,
Konstantin" <konstantin.ananyev@intel.com>,
didier.pallard@6wind.com
Subject: Re: [dpdk-dev] [PATCH v2 1/4] ethdev: add Rx offload outer UDP checksum definition
Date: Sat, 06 Oct 2018 00:44:52 +0200 [thread overview]
Message-ID: <26087815.IDbtF1NTBH@xps> (raw)
In-Reply-To: <c304808d-32d1-26e5-d3b7-88e79c4512c3@intel.com>
05/10/2018 22:04, Ferruh Yigit:
> On 10/4/2018 6:59 AM, Jerin Jacob wrote:
> > From: Andrew Rybchenko <arybchenko@solarflare.com>
> >> On 03.10.2018 21:14, Jerin Jacob wrote:
> >>> From: Andrew Rybchenko <arybchenko@solarflare.com>
> >>>> On 03.10.2018 20:12, Jerin Jacob wrote:
> >>>>> From: Jerin Jacob <jerin.jacob@caviumnetworks.com>
> >>>>>> From: Andrew Rybchenko <arybchenko@solarflare.com>
> >>>>>>> 3. PKT_RX_L4_CKSUM_MASK description says nothing if it is inner or outer.
> >>>>>>> May be it is not directly related to changeset, but I think it would be really
> >>>>>>> useful to clarify it.
> >>>>>> I will update the comment.
> >>>>> Hi Andrew,
> >>>>>
> >>>>> I looked at the other definitions in mbuf.h, according the documentation,
> >>>>> If nothing is mentioned it is treated as inner if the packet is
> >>>>> tunneled else it is outer most. So I would like avoid confusion by
> >>>>> adding "inner" in the exiting PKT_RX_L4_CKSUM_MASK comment.
> >>>>> Technically it is not correct to say "inner" if the packet is not
> >>>>> tunneled. So I am untouching the exiting comment.
> >>>>>
> >>>> Yes, it is incorrect to say that it is inner. How does application find
> >>>> how to treat PKT_RX_L4_CKSUM (inner or outer)?
> >>>> Should it rely on packet type provided in mbuf?
> >>> AFAIK, Finding is it a tunneled packet or not is through ptype or SW has
> >>> to parse the packet. For example, testpmd chooses later method using
> >>> "csum parse-tunnel on <port>" to detect the presence of the tunnel.
> >>
> >> SW parsing of the packet cannot help, since app should be sure
> >> that HW has classified the packet as tunneled and provided information
> >> about inner and outer checksum checks.
> >
> >
> > I thought the question was, How does the application find how to treat
> > PKT_RX_L4_CKSUM (inner or outer)?
> > Obviously, ptype will help here
> > Not sure why SW parsing won't help here if SW parses and find it is an
> > inner packet or it is not a tunneled packet. PKT_RX_L4_CKSUM treat as
> > inner checksum for former case and PKT_RX_L4_CKSUM treated as plain l4
> > checksum in the latter case.
>
> I don't know if PKT_RX_L4_CKSUM is inner or outer with current design,
> but wouldn't be easier if PKT_RX_L4_CKSUM always refer to outer and if tunneled
> use something like PKT_RX_INNER_L4_CKSUM, same for IP and TX.
The return of the come back of the "inner vs outer" discussion :-)
There were some thoughts about what is the most convenient for apps doing
decapsulation of tunnels.
I think the decision was to choose inner as the default, while outer
must be explicited.
Honestly, we should not try to change again the meaning of symbols
having no outer/inner word in their name, except if we have a
very very good reason and arguments.
And for new symbols, we must follow the community decision.
However, we should re-visit the flag PKT_RX_EIP_CKSUM_BAD.
next prev parent reply other threads:[~2018-10-05 22:45 UTC|newest]
Thread overview: 87+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-13 13:47 [dpdk-dev] [PATCH 1/4] ethdev: add SCTP Rx checksum offload support Jerin Jacob
2018-09-13 13:47 ` [dpdk-dev] [PATCH 2/4] mbuf: fix Tx offload mask Jerin Jacob
2018-10-01 13:45 ` Ferruh Yigit
2018-10-01 15:53 ` Jerin Jacob
2018-10-01 16:13 ` Ferruh Yigit
2018-09-13 13:47 ` [dpdk-dev] [PATCH 3/4] ethdev: add Rx offload outer L4 checksum definitions Jerin Jacob
2018-09-13 17:24 ` Shahaf Shuler
2018-09-14 3:05 ` Jerin Jacob
2018-09-16 5:53 ` Shahaf Shuler
2018-09-16 9:32 ` Jerin Jacob
2018-09-13 13:47 ` [dpdk-dev] [PATCH 4/4] ethdev: add Tx " Jerin Jacob
2018-10-01 13:45 ` Ferruh Yigit
2018-10-02 9:52 ` Jerin Jacob
2018-10-01 13:45 ` [dpdk-dev] [PATCH 1/4] ethdev: add SCTP Rx checksum offload support Ferruh Yigit
2018-10-01 13:46 ` Ferruh Yigit
2018-10-01 15:59 ` Jerin Jacob
2018-10-01 16:11 ` Ferruh Yigit
2018-10-02 8:53 ` Jerin Jacob
2018-10-02 9:13 ` Ferruh Yigit
2018-10-02 10:51 ` [dpdk-dev] [PATCH v2 1/2] " Jerin Jacob
2018-10-02 10:51 ` [dpdk-dev] [PATCH v2 2/2] mbuf: fix Tx offload mask Jerin Jacob
2018-10-04 2:31 ` Hu, Jiayu
2018-10-04 16:05 ` Ferruh Yigit
2018-10-03 18:52 ` [dpdk-dev] [PATCH v2 1/2] ethdev: add SCTP Rx checksum offload support Ferruh Yigit
2018-10-02 19:24 ` [dpdk-dev] [PATCH v2 1/4] ethdev: add Rx offload outer UDP checksum definition Jerin Jacob
2018-10-02 19:24 ` [dpdk-dev] [PATCH v2 2/4] ethdev: add Tx " Jerin Jacob
2018-10-03 7:41 ` Andrew Rybchenko
2018-10-03 7:58 ` Jerin Jacob
2018-10-03 8:02 ` Ferruh Yigit
2018-10-03 8:36 ` Thomas Monjalon
2018-10-03 10:52 ` Iremonger, Bernard
2018-10-02 19:24 ` [dpdk-dev] [PATCH v2 3/4] app/testpmd: add outer UDP HW checksum support Jerin Jacob
2018-10-03 13:23 ` Iremonger, Bernard
2018-10-02 19:24 ` [dpdk-dev] [PATCH v2 4/4] app/testpmd: collect bad outer L4 checksum for csum engine Jerin Jacob
2018-10-03 8:29 ` Andrew Rybchenko
2018-10-03 7:34 ` [dpdk-dev] [PATCH v2 1/4] ethdev: add Rx offload outer UDP checksum definition Andrew Rybchenko
2018-10-03 7:57 ` Jerin Jacob
2018-10-03 8:35 ` Thomas Monjalon
2018-10-03 8:36 ` Andrew Rybchenko
2018-10-03 17:12 ` Jerin Jacob
2018-10-03 18:00 ` Andrew Rybchenko
2018-10-03 18:14 ` Jerin Jacob
2018-10-03 19:47 ` Andrew Rybchenko
2018-10-03 20:08 ` Thomas Monjalon
2018-10-04 5:59 ` Jerin Jacob
2018-10-05 19:48 ` Ferruh Yigit
2018-10-05 20:04 ` Ferruh Yigit
2018-10-05 22:44 ` Thomas Monjalon [this message]
2018-10-06 8:15 ` Jerin Jacob
2018-10-06 12:18 ` Ananyev, Konstantin
2018-10-08 8:12 ` Ferruh Yigit
2018-10-08 8:24 ` Jerin Jacob
2018-10-08 9:04 ` Thomas Monjalon
2018-10-08 9:37 ` Jerin Jacob
2018-10-08 10:53 ` Ferruh Yigit
2018-10-08 11:55 ` Jerin Jacob
2018-10-08 12:13 ` Ferruh Yigit
2018-10-08 12:25 ` Jerin Jacob
2018-10-08 13:03 ` Thomas Monjalon
2018-10-08 13:08 ` Jerin Jacob
2018-10-03 8:53 ` Ananyev, Konstantin
2018-10-03 8:59 ` Jerin Jacob
2018-10-03 9:17 ` Ananyev, Konstantin
2018-10-03 9:22 ` Jerin Jacob
2018-10-03 10:16 ` Ananyev, Konstantin
2018-10-03 11:15 ` Jerin Jacob
2018-10-03 10:51 ` Iremonger, Bernard
2018-10-03 11:19 ` Jerin Jacob
2018-10-03 13:00 ` Iremonger, Bernard
2018-10-03 18:16 ` [dpdk-dev] [PATCH v3 " Jerin Jacob
2018-10-03 18:16 ` [dpdk-dev] [PATCH v3 2/4] ethdev: add Tx " Jerin Jacob
2018-10-03 18:16 ` [dpdk-dev] [PATCH v3 3/4] app/testpmd: add outer UDP HW checksum support Jerin Jacob
2018-10-03 18:16 ` [dpdk-dev] [PATCH v3 4/4] app/testpmd: collect bad outer L4 checksum for csum engine Jerin Jacob
2018-10-04 13:45 ` Iremonger, Bernard
2018-10-04 14:16 ` Jerin Jacob
2018-10-04 15:06 ` Iremonger, Bernard
2018-10-08 16:09 ` [dpdk-dev] [PATCH v4 1/4] ethdev: add Rx offload outer UDP checksum definition Jerin Jacob
2018-10-08 16:09 ` [dpdk-dev] [PATCH v4 2/4] ethdev: add Tx " Jerin Jacob
2018-10-09 10:06 ` Andrew Rybchenko
2018-10-08 16:09 ` [dpdk-dev] [PATCH v4 3/4] app/testpmd: add outer UDP HW checksum support Jerin Jacob
2018-10-08 16:09 ` [dpdk-dev] [PATCH v4 4/4] app/testpmd: collect bad outer L4 checksum for csum engine Jerin Jacob
2018-10-09 10:06 ` [dpdk-dev] [PATCH v4 1/4] ethdev: add Rx offload outer UDP checksum definition Andrew Rybchenko
2018-10-09 14:18 ` [dpdk-dev] [PATCH v5 " Jerin Jacob
2018-10-09 14:18 ` [dpdk-dev] [PATCH v5 2/4] ethdev: add Tx " Jerin Jacob
2018-10-09 14:18 ` [dpdk-dev] [PATCH v5 3/4] app/testpmd: add outer UDP HW checksum support Jerin Jacob
2018-10-09 14:18 ` [dpdk-dev] [PATCH v5 4/4] app/testpmd: collect bad outer L4 checksum for csum engine Jerin Jacob
2018-10-09 16:46 ` [dpdk-dev] [PATCH v5 1/4] ethdev: add Rx offload outer UDP checksum definition Ferruh Yigit
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