From: Jerin Jacob <jerinjacobk@gmail.com>
To: Alexander Kozyrev <akozyrev@nvidia.com>,
Cristian Dumitrescu <cristian.dumitrescu@intel.com>,
aboyer@pensando.io
Cc: dpdk-dev <dev@dpdk.org>,
Viacheslav Ovsiienko <viacheslavo@nvidia.com>,
orika@nvidia.com, Thomas Monjalon <thomas@monjalon.net>,
Ferruh Yigit <ferruh.yigit@intel.com>,
Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Subject: Re: [dpdk-dev] [PATCH] ethdev: introduce generic copy rte flow action
Date: Thu, 14 Jan 2021 19:29:41 +0530 [thread overview]
Message-ID: <CALBAE1N8jS=cDXjL2WS=j0wQ2quWitf+WJUqSfakfm6t3TA6Ug@mail.gmail.com> (raw)
In-Reply-To: <20210108063234.7679-1-akozyrev@nvidia.com>
On Fri, Jan 8, 2021 at 12:02 PM Alexander Kozyrev <akozyrev@nvidia.com> wrote:
>
> Implement a generic copy flow API to allow copying of an arbitrary
> header field (as well as mark, metadata or tag) to another item.
>
> This generic copy mechanism removes the necessity to implement a
> separate RTE Flow action every time we need to modify a new packet
> field in the future. A user-provided value can be used from a
> specified tag/metadata or directly copied from other packet field.
>
> The number of bits to copy as well as the offset to start from can
> be specified to allow a partial copy or copy into an arbitrary
> place in a packet for greater flexibility.
>
> RFC: http://patches.dpdk.org/patch/85384/
>
> Signed-off-by: Alexander Kozyrev <akozyrev@nvidia.com>
> ---
>
> +Action: ``COPY_ITEM``
> +^^^^^^^^^^^^^^^^^^^^^
> +
> +Copy ``width`` bits from ``src`` item to ``dst`` item.
> +
> +An arbitrary header field (as well as mark, metadata or tag values)
> +can be used as both source and destination items as set by ``item``.
> +
> +Inner packet header fields can be accessed using the ``index`` and
> +it is possible to start the copy from the ``offset`` bits in an item.
> +
> +.. _table_rte_flow_action_copy_item:
> +
> +.. table:: COPY_ITEM
> +
> + +-----------------------------------------+
> + | Field | Value |
> + +===============+=========================+
> + | ``dst`` | destination item |
> + | ``src`` | source item |
> + | ``width`` | number of bits to copy |
Overall it is a good improvement.
I think, if we add transform "op" here then it can be more generic. In
other words, A generic packet transform and copy operation is just one
of the operations.
ie.. making it as rte_flow_action_xform_item and introduce COPY, ADD,
SUB, etc transform along with existing rte_flow_action_copy_item
fields.
It may useful for expressing P4 packet transforms to rte_flow.
The current generation of Marvell HW does not have COPY transform so I
am leaving suggestions to vendors with this HW capablity.
> + +---------------+-------------------------+
> +
> +.. _table_rte_flow_action_copy_data:
> +
> +.. table:: destination/source item definition
> +
> + +----------------------------------------------------------+
> + | Field | Value |
> + +===============+==========================================+
> + | ``item`` | ID of a packet field/mark/metadata/tag |
> + | ``index`` | index of outer/inner header or tag array |
> + | ``offset`` | number of bits to skip during the copy |
> + +---------------+------------------------------------------+
> +
next prev parent reply other threads:[~2021-01-14 14:00 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-08 6:32 Alexander Kozyrev
2021-01-10 8:00 ` Ori Kam
2021-01-10 9:36 ` Asaf Penso
2021-01-12 14:15 ` Alexander Kozyrev
2021-01-12 14:52 ` Ori Kam
2021-01-12 15:13 ` Ori Kam
2021-01-12 17:19 ` Alexander Kozyrev
2021-01-12 5:01 ` [dpdk-dev] [PATCH v2 0/2] generic copy rte flow action support Alexander Kozyrev
2021-01-12 5:01 ` [dpdk-dev] [PATCH v2 1/2] ethdev: introduce generic copy rte flow action Alexander Kozyrev
2021-01-12 5:01 ` [dpdk-dev] [PATCH v2 2/2] app/testpmd: add support for " Alexander Kozyrev
2021-01-12 14:58 ` Ori Kam
2021-01-13 3:38 ` [dpdk-dev] [PATCH v3 0/2] generic copy rte flow action support Alexander Kozyrev
2021-01-13 3:38 ` [dpdk-dev] [PATCH v3 1/2] ethdev: introduce generic copy rte flow action Alexander Kozyrev
2021-01-13 11:12 ` Ori Kam
2021-01-13 3:38 ` [dpdk-dev] [PATCH v3 2/2] app/testpmd: add support for " Alexander Kozyrev
2021-01-13 17:07 ` [dpdk-dev] [PATCH v4 0/2] generic copy rte flow action support Alexander Kozyrev
2021-01-13 17:07 ` [dpdk-dev] [PATCH v4 1/2] ethdev: introduce generic copy rte flow action Alexander Kozyrev
2021-01-14 12:22 ` Ori Kam
2021-01-13 17:07 ` [dpdk-dev] [PATCH v4 2/2] app/testpmd: add support for " Alexander Kozyrev
2021-01-14 15:18 ` Ori Kam
2021-01-15 15:37 ` Alexander Kozyrev
2021-01-15 15:42 ` [dpdk-dev] [PATCH v5 0/2] generic modify rte flow action support Alexander Kozyrev
2021-01-15 15:42 ` [dpdk-dev] [PATCH v5 1/2] ethdev: introduce generic modify rte flow action Alexander Kozyrev
2021-01-15 18:03 ` Ori Kam
2021-01-17 9:23 ` Slava Ovsiienko
2021-01-15 15:42 ` [dpdk-dev] [PATCH v5 2/2] app/testpmd: add support for modify field " Alexander Kozyrev
2021-01-15 18:04 ` Ori Kam
2021-01-16 4:44 ` [dpdk-dev] [PATCH v6 0/2] generic modify rte flow action support Alexander Kozyrev
2021-01-16 4:44 ` [dpdk-dev] [PATCH v6 1/2] ethdev: introduce generic modify rte flow action Alexander Kozyrev
2021-01-16 4:44 ` [dpdk-dev] [PATCH v6 2/2] app/testpmd: add support for modify field " Alexander Kozyrev
2021-01-16 4:50 ` [dpdk-dev] [PATCH v7 0/2] generic modify rte flow action support Alexander Kozyrev
2021-01-16 4:50 ` [dpdk-dev] [PATCH v7 1/2] ethdev: introduce generic modify rte flow action Alexander Kozyrev
2021-01-17 23:15 ` Thomas Monjalon
2021-01-18 16:03 ` Alexander Kozyrev
2021-01-16 4:50 ` [dpdk-dev] [PATCH v7 2/2] app/testpmd: add support for modify field " Alexander Kozyrev
2021-01-18 16:18 ` [dpdk-dev] [PATCH v8 0/2] generic modify rte flow action support Alexander Kozyrev
2021-01-18 16:18 ` [dpdk-dev] [PATCH v8 1/2] ethdev: introduce generic modify rte flow action Alexander Kozyrev
2021-01-18 17:51 ` Thomas Monjalon
2021-01-18 16:18 ` [dpdk-dev] [PATCH v8 2/2] app/testpmd: add support for modify field " Alexander Kozyrev
2021-01-18 20:05 ` [dpdk-dev] [PATCH v8 0/2] generic modify rte flow action support Ajit Khaparde
2021-01-18 21:40 ` [dpdk-dev] [PATCH v9 " Alexander Kozyrev
2021-01-18 21:40 ` [dpdk-dev] [PATCH v9 1/2] ethdev: introduce generic modify rte flow action Alexander Kozyrev
2021-01-18 21:40 ` [dpdk-dev] [PATCH v9 2/2] app/testpmd: add support for modify field " Alexander Kozyrev
2021-01-19 1:21 ` [dpdk-dev] [PATCH v9 0/2] generic modify rte flow action support Ferruh Yigit
2021-01-14 13:59 ` Jerin Jacob [this message]
2021-01-14 15:02 ` [dpdk-dev] [PATCH] ethdev: introduce generic copy rte flow action Ori Kam
2021-01-15 14:00 ` Jerin Jacob
2021-01-15 15:33 ` Alexander Kozyrev
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