From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Xueming Li <xuemingl@mellanox.com>
Cc: dev@dpdk.org, Adrien Mazarguil <adrien.mazarguil@6wind.com>,
Shahaf Shuler <shahafs@mellanox.com>,
Thomas Monjalon <thomas@monjalon.net>,
Olivier Matz <olivier.matz@6wind.com>
Subject: Re: [dpdk-dev] [RFC v2] ethdev: add flow metadata
Date: Mon, 20 Aug 2018 16:45:51 +0100 [thread overview]
Message-ID: <ba0bdf04-8e65-c8a9-b9fe-eab8692e76d0@intel.com> (raw)
In-Reply-To: <20180626085401.4289-1-xuemingl@mellanox.com>
On 6/26/2018 9:54 AM, Xueming Li wrote:
> Currently, rte_flow pattern only match packet header fields.
> This patch adds additional data to match the packet.
>
> For example, in egress direction, to do an action depending on the VM
> id, the application needs to configure rte_flow rule with the new
> metadata pattern:
> pattern meta data is {vm} / end action encap …
> Then the PMD will send VM id as metadata associated in mbuf to NIC,
> then egress flow on NIC match metadata as other regular packet headers,
> the appropriate encapsulation is done according to the VM id metadata.
>
> Metadata could be used on ingress as well to save useful info before
> flow modification (not defined yet) or decapsulation action. PMD is
> responsible to save metadata into mbuf field. The application must get
> metadata from the mbuf.
>
> Cc: Thomas Monjalon <thomas@monjalon.net>
> Cc: Olivier Matz <olivier.matz@6wind.com>
> Cc: Shahaf Shuler <shahafs@mellanox.com>
> Signed-off-by: Xueming Li <xuemingl@mellanox.com>
> ---
> doc/guides/prog_guide/rte_flow.rst | 7 +++++++
> lib/librte_ethdev/rte_flow.c | 1 +
> lib/librte_ethdev/rte_flow.h | 28 ++++++++++++++++++++++++++++
> 3 files changed, 36 insertions(+)
>
> diff --git a/doc/guides/prog_guide/rte_flow.rst b/doc/guides/prog_guide/rte_flow.rst
> index b305a72a5..7989e5856 100644
> --- a/doc/guides/prog_guide/rte_flow.rst
> +++ b/doc/guides/prog_guide/rte_flow.rst
> @@ -1191,6 +1191,13 @@ Normally preceded by any of:
> - `Item: ICMP6_ND_NS`_
> - `Item: ICMP6_ND_OPT`_
>
> +Item: ``META``
> +^^^^^^^^^^^^^^
> +
> +Matches a metadata variable.
> +
> +- ``data``: 64 bit value.
> +
Isn't this "user data" more than metadata?
And there is only one userdata can be provided for a flow.
Can there be a need to provide multiple userdata? Should we support it?
For your example, on egress what if you want to do specific action on a flow for
both VM id and process id, you can only pass single user data?
What about passing a key-value pair?
next prev parent reply other threads:[~2018-08-20 15:45 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-07 12:52 [dpdk-dev] [RFC v1] " Xueming Li
2018-06-26 8:54 ` [dpdk-dev] [RFC v2] " Xueming Li
2018-08-20 15:45 ` Ferruh Yigit [this message]
2018-08-20 16:03 ` Ferruh Yigit
2018-08-23 20:41 ` Yongseok Koh
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