From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by dpdk.org (Postfix) with ESMTP id D1BE3160 for ; Mon, 23 Jul 2018 23:41:04 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 23 Jul 2018 14:41:04 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,394,1526367600"; d="scan'208";a="242669464" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.249.66.186]) ([10.249.66.186]) by orsmga005.jf.intel.com with ESMTP; 23 Jul 2018 14:40:49 -0700 To: Adrien Mazarguil , Shahaf Shuler Cc: Nelio Laranjeiro , Yongseok Koh , dev@dpdk.org References: <20180627173355.4718-1-adrien.mazarguil@6wind.com> <20180713092910.26276-1-adrien.mazarguil@6wind.com> <20180713092910.26276-2-adrien.mazarguil@6wind.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: <20180713092910.26276-2-adrien.mazarguil@6wind.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [dpdk-dev] [PATCH v2 1/6] net/mlx5: lay groundwork for switch offloads 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: Mon, 23 Jul 2018 21:41:05 -0000 On 7/13/2018 10:40 AM, Adrien Mazarguil wrote: > With mlx5, unlike normal flow rules implemented through Verbs for traffic > emitted and received by the application, those targeting different logical > ports of the device (VF representors for instance) are offloaded at the > switch level and must be configured through Netlink (TC interface). > > This patch adds preliminary support to manage such flow rules through the > flow API (rte_flow). > > Instead of rewriting tons of Netlink helpers and as previously suggested by > Stephen [1], this patch introduces a new dependency to libmnl [2] > (LGPL-2.1) when compiling mlx5. > > [1] https://mails.dpdk.org/archives/dev/2018-March/092676.html > [2] https://netfilter.org/projects/libmnl/ Just to highlight this new PMD level dependency to libmnl. tap pmd also uses netlink and vdev_netvsc also does nl communication, perhaps we can discuss unifying netlink usage around this new library. > > Signed-off-by: Adrien Mazarguil > Acked-by: Nelio Laranjeiro > Cc: Yongseok Koh > -- > v2 changes: > > - Added NETLINK_CAP_ACK definition if missing from the host system. This > parameter is also not mandatory anymore and won't prevent creation of > NL sockets when not supported. > - Modified mlx5_nl_flow_nl_ack() and mlx5_nl_flow_init() to consume the > least amount of stack space based on message size, instead of the fixed > MNL_SOCKET_BUFFER_SIZE which is quite large. <...>