From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by dpdk.org (Postfix) with ESMTP id B325E1B58B for ; Tue, 9 Oct 2018 16:48:41 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 09 Oct 2018 07:48:40 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,360,1534834800"; d="scan'208";a="239830197" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.49]) ([10.237.221.49]) by orsmga004.jf.intel.com with ESMTP; 09 Oct 2018 07:46:59 -0700 To: Andrew Rybchenko , Dekel Peled , wenzhuo.lu@intel.com, jingjing.wu@intel.com, bernard.iremonger@intel.com, dev@dpdk.org, olivier.matz@6wind.com, adrien.mazarguil@6wind.com, thomas@monjalon.net Cc: shahafs@mellanox.com, orika@mellanox.com, Cristian Dumitrescu References: <1537108670-11380-1-git-send-email-dekelp@mellanox.com> <1538056677-33846-2-git-send-email-dekelp@mellanox.com> <0d34ba46-336c-6853-55d3-19b8f46d2db9@intel.com> <3f173f88-3206-911c-4330-57a84201a71b@solarflare.com> From: Ferruh Yigit Openpgp: preference=signencrypt Autocrypt: addr=ferruh.yigit@intel.com; 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WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <3f173f88-3206-911c-4330-57a84201a71b@solarflare.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [dpdk-dev] [PATCH v3 1/3] ethdev: support metadata as flow rule criteria X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Oct 2018 14:48:42 -0000 On 10/5/2018 2:39 PM, Andrew Rybchenko wrote: > On 10/5/18 4:31 PM, Ferruh Yigit wrote: >> On 9/27/2018 2:57 PM, Dekel Peled wrote: >>> As described in [1], a new rte_flow item is added to support metadata >>> to use as flow rule match pattern. >>> The metadata is an opaque item, fully controlled by the application. >>> >>> The use of metadata is relevant for egress rules only. >>> It can be set in the flow rule using the RTE_FLOW_ITEM_META. >>> >>> In order to avoid change in mbuf API, exisitng field buf.hash.fdir.hi >>> is used to carry the metadata item. This field is used only in >>> ingress packets, so using it for egress metadata will not cause >>> conflicts. >>> >>> Application should set the packet metadata in the mbuf dedicated field, >>> and set the PKT_TX_METADATA flag in the mbuf->ol_flags. >>> The NIC will use the packet metadata as match criteria for relevant >>> flow rules. >>> >>> This patch introduces metadata item type for rte_flow RTE_FLOW_ITEM_META, >>> along with corresponding struct rte_flow_item_meta and ol_flag >>> PKT_TX_METADATA. >>> >>> [1] "[RFC,v2] ethdev: support metadata as flow rule criteria" >>> http://mails.dpdk.org/archives/dev/2018-August/110194.html >>> >>> Signed-off-by: Dekel Peled >> <...> >> >>> @@ -526,6 +532,12 @@ struct rte_mbuf { >>> uint32_t hi; >>> /**< First 4 flexible bytes or FD ID, dependent on >>> PKT_RX_FDIR_* flag in ol_flags. */ >>> + /** >>> + * Above member has optional use on egress: >>> + * Application specific metadata value >>> + * for flow rule match. >>> + * Valid if PKT_TX_METADATA is set. >>> + */ >>> } fdir; /**< Filter identifier if FDIR enabled */ >> Any objection/comment to use hash.fdir.hi for this new "metadata" meaning? Olivier? > > As for me, I'd prefer to see dedicated union member something like > it was suggested in [1]. Another comment, it was from Cristian while discussing something else, since this field is for egress, shouldn't it be somewhere in second cache line allocated for Tx? > > Andrew. > > [1] http://mails.dpdk.org/archives/dev/2018-September/111954.html >