From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: <dev-bounces@dpdk.org> Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 31D4EA2EFC for <public@inbox.dpdk.org>; Mon, 14 Oct 2019 18:17:38 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id C74B41C221; Mon, 14 Oct 2019 18:17:37 +0200 (CEST) Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by dpdk.org (Postfix) with ESMTP id 121761C21A for <dev@dpdk.org>; Mon, 14 Oct 2019 18:17:36 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 14 Oct 2019 09:17:36 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.67,296,1566889200"; d="scan'208";a="199444746" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.10]) ([10.237.221.10]) by orsmga006.jf.intel.com with ESMTP; 14 Oct 2019 09:17:34 -0700 From: Ferruh Yigit <ferruh.yigit@intel.com> To: Igor Ryzhov <iryzhov@nfware.com>, dev@dpdk.org Cc: aconole@redhat.com, Dan Gora <dg@adax.com> References: <20190924193312.17381-1-iryzhov@nfware.com> <20190925093623.18419-1-iryzhov@nfware.com> <05b55e82-f992-c9d3-593d-3c608b7bb543@intel.com> Openpgp: preference=signencrypt Autocrypt: addr=ferruh.yigit@intel.com; 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charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Subject: Re: [dpdk-dev] [PATCH v3] kni: rework rte_kni_update_link using ioctl X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> Errors-To: dev-bounces@dpdk.org Sender: "dev" <dev-bounces@dpdk.org> On 10/14/2019 5:10 PM, Ferruh Yigit wrote: > On 9/25/2019 10:36 AM, Igor Ryzhov wrote: >> Current implementation doesn't allow us to update KNI carrier if the >> interface is not yet UP in kernel. It means that we can't use it in the >> same thread which is processing rte_kni_ops.config_network_if, which is >> very convenient, because it allows us to have correct carrier status >> of the interface right after we enabled it and we don't have to use any >> additional thread to track link status. > > Hi Igor, > > The existing thread tracks the link status of the physical device and reflects > the changes to the kni netdev, but the "struct rte_kni_ops" > (rte_kni_ops.config_network_if) works other way around, it captures (some) > requests to kni netdev and reflects them to the underlying physical device. > Even 'rte_kni_update_link()' updated to use ioctl, the thread still looks > required and this patch doesn't really changes that part. > > Also I am reluctant to extend the KNI ioctl interface when there is a generic > way to do that work. > > What is the use case of updating kni netdev carrier status when the interface is > down? btw, if the problem is status of the interface being 'no-carrier' by default, this can be changed by "carrier=on" parameter of the kni kernel module: "insmod ./build/kmod/rte_kni.ko carrier=on" > >> >> Signed-off-by: Igor Ryzhov <iryzhov@nfware.com> > > <...> >