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From: Ori Kam <orika@nvidia.com>
To: Bing Zhao <bingz@nvidia.com>,
	NBU-Contact-Thomas Monjalon <thomas@monjalon.net>,
	"ferruh.yigit@intel.com" <ferruh.yigit@intel.com>,
	"andrew.rybchenko@oktetlabs.ru" <andrew.rybchenko@oktetlabs.ru>
Cc: "dev@dpdk.org" <dev@dpdk.org>,
	"ajit.khaparde@broadcom.com" <ajit.khaparde@broadcom.com>,
	"xiaoyun.li@intel.com" <xiaoyun.li@intel.com>
Subject: Re: [dpdk-dev] [PATCH v4 1/3] ethdev: introduce conntrack flow action and item
Date: Mon, 19 Apr 2021 17:33:25 +0000
Message-ID: <DM6PR12MB498738ABEEE3541421B346B1D6499@DM6PR12MB4987.namprd12.prod.outlook.com> (raw)
In-Reply-To: <1618852616-369498-2-git-send-email-bingz@nvidia.com>



> -----Original Message-----
> From: Bing Zhao <bingz@nvidia.com>
> Sent: Monday, April 19, 2021 8:17 PM
> Subject: [PATCH v4 1/3] ethdev: introduce conntrack flow action and item
> 
> This commit introduces the conntrack action and item.
> 
> Usually the HW offloading is stateless. For some stateful offloading
> like a TCP connection, HW module will help provide the ability of a
> full offloading w/o SW participation after the connection was
> established.
> 
> The basic usage is that in the first flow rule the application should
> add the conntrack action and jump to the next flow table. In the
> following flow rule(s) of the next table, the application should use
> the conntrack item to match on the result.
> 
> A TCP connection has two directions traffic. To set a conntrack
> action context correctly, the information of packets from both
> directions are required.
> 
> The conntrack action should be created on one ethdev port and supply
> the peer ethdev port as a parameter to the action. After context
> created, it could only be used between these two ethdev ports
> (dual-port mode) or a single port. The application should modify the
> action via the API "rte_action_handle_update" only when before using
> it to create a flow rule with conntrack for the opposite direction.
> This will help the driver to recognize the direction of the flow to
> be created, especially in the single-port mode, in which case the
> traffic from both directions will go through the same ethdev port
> if the application works as an "forwarding engine" but not an end
> point. There is no need to call the update interface if the
> subsequent flow rules have nothing to be changed.
> 
> Query will be supported via "rte_action_handle_query" interface,
> about the current packets information and connection status. The
> fields query capabilities depends on the HW.
> 
> For the packets received during the conntrack setup, it is suggested
> to re-inject the packets in order to make sure the conntrack module
> works correctly without missing any packet. Only the valid packets
> should pass the conntrack, packets with invalid TCP information,
> like out of window, or with invalid header, like malformed, should
> not pass.
> 
> Naming and definition:
> https://elixir.bootlin.com/linux/latest/source/include/uapi/linux/
>         netfilter/nf_conntrack_tcp.h
> https://elixir.bootlin.com/linux/latest/source/net/netfilter/
>         nf_conntrack_proto_tcp.c
> 
> Other reference:
> https://www.usenix.org/legacy/events/sec01/invitedtalks/rooij.pdf
> 
> Signed-off-by: Bing Zhao <bingz@nvidia.com>
> ---

Acked-by: Ori Kam <orika@nvidia.com>
Thanks,
Ori

  reply	other threads:[~2021-04-19 17:33 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-18  7:30 [dpdk-dev] [RFC] " Bing Zhao
2021-03-22 15:16 ` Andrew Rybchenko
2021-04-07  7:43   ` Bing Zhao
2021-03-23 23:27 ` Ajit Khaparde
2021-04-07  2:41   ` Bing Zhao
2021-04-10 13:46 ` [dpdk-dev] [PATCH] " Bing Zhao
2021-04-15 16:24   ` Ori Kam
2021-04-15 16:44     ` Bing Zhao
2021-04-15 16:41   ` [dpdk-dev] [PATCH v2 0/2] " Bing Zhao
2021-04-15 16:41     ` [dpdk-dev] [PATCH v2 1/2] " Bing Zhao
2021-04-16 10:49       ` Thomas Monjalon
2021-04-16 18:18         ` Bing Zhao
2021-04-16 12:41       ` Ori Kam
2021-04-16 18:05         ` Bing Zhao
2021-04-16 21:47           ` Ajit Khaparde
2021-04-17  6:10             ` Bing Zhao
2021-04-17 14:54               ` Ajit Khaparde
2021-04-15 16:41     ` [dpdk-dev] [PATCH v2 2/2] app/testpmd: add CLI for conntrack Bing Zhao
2021-04-16  8:46       ` Ori Kam
2021-04-16 18:20         ` Bing Zhao
2021-04-16 17:54   ` [dpdk-dev] [PATCH v3 0/3] ethdev: introduce conntrack flow action and item Bing Zhao
2021-04-16 17:54     ` [dpdk-dev] [PATCH v3 1/3] " Bing Zhao
2021-04-16 18:30       ` Ajit Khaparde
2021-04-19 14:08         ` Thomas Monjalon
2021-04-19 16:21           ` Bing Zhao
2021-04-19 14:06       ` Thomas Monjalon
2021-04-19 16:13         ` Bing Zhao
2021-04-16 17:54     ` [dpdk-dev] [PATCH v3 2/3] app/testpmd: add CLI for conntrack Bing Zhao
2021-04-16 17:54     ` [dpdk-dev] [PATCH v3 3/3] doc: update " Bing Zhao
2021-04-16 18:22       ` Thomas Monjalon
2021-04-16 18:30       ` Ajit Khaparde
2021-04-19 17:28         ` Bing Zhao
2021-04-19 17:16   ` [dpdk-dev] [PATCH v4 0/3] ethdev: introduce conntrack flow action and item Bing Zhao
2021-04-19 17:16     ` [dpdk-dev] [PATCH v4 1/3] " Bing Zhao
2021-04-19 17:33       ` Ori Kam [this message]
2021-04-19 17:16     ` [dpdk-dev] [PATCH v4 2/3] app/testpmd: add CLI for conntrack Bing Zhao
2021-04-19 17:35       ` Ori Kam
2021-04-19 17:16     ` [dpdk-dev] [PATCH v4 3/3] doc: update " Bing Zhao
2021-04-19 17:32       ` Thomas Monjalon
2021-04-19 17:37       ` Ori Kam
2021-04-19 17:51   ` [dpdk-dev] [PATCH v5 0/2] ethdev: introduce conntrack flow action and item Bing Zhao
2021-04-19 17:51     ` [dpdk-dev] [PATCH v5 1/2] " Bing Zhao
2021-04-19 18:07       ` Thomas Monjalon
2021-04-19 23:29         ` Ferruh Yigit
2021-04-19 17:51     ` [dpdk-dev] [PATCH v5 2/2] app/testpmd: add CLI for conntrack Bing Zhao

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