From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 18267A3179 for ; Thu, 17 Oct 2019 12:48:01 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id C9A3F1E938; Thu, 17 Oct 2019 12:48:00 +0200 (CEST) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by dpdk.org (Postfix) with ESMTP id 70CDF1E930 for ; Thu, 17 Oct 2019 12:47:58 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 17 Oct 2019 03:47:57 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.67,307,1566889200"; d="scan'208";a="199331372" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.10]) ([10.237.221.10]) by orsmga003.jf.intel.com with ESMTP; 17 Oct 2019 03:47:55 -0700 To: Andrew Rybchenko , Ciara Power , mtetsuyah@gmail.com Cc: dev@dpdk.org, Thomas Monjalon References: <20191016154606.39218-1-ciara.power@intel.com> <5b6af628-7101-484b-01db-16272025105f@solarflare.com> From: Ferruh Yigit 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] [RFC] net/null: add empty promiscuous mode functions 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: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 10/17/2019 11:37 AM, Andrew Rybchenko wrote: > On 10/16/19 9:07 PM, Ferruh Yigit wrote: >> On 10/16/2019 4:46 PM, Ciara Power wrote: >>> Adding promiscuous functions prevents sample applications failing when run >>> on this virtual PMD. The sample applications call promiscuous functions, >>> and fail if this function call returns an error, which occurs when the >>> virtual PMD does not support the promiscuous function being called. >>> >>> This change will be implemented for all virtual PMDs that currently do not >>> have existing promiscuous functions. Multicast functions will also be >>> added for virtual PMDs to prevent sample application breakages here also. >> +Andrew >> >> With the some ethdev APIs returning error code, some sample applications stop >> working with virtual interfaces, >> >> We can, >> 1- update sample applications to ignore the errors >> 2- Add dummy dev_ops support to (almost all) virtual PMDs (what this RFC suggests) >> >> (1) puts us back to before the ethdev APIs updated status, and this may be wrong >> for the physical devices case, so I am for this RFC. >> >> Only perhaps we can have some common empty function and keep assigning that one >> to reduce the dummy code, what do you think? > > I don't like the idea to have common empty/dummy functions. > If virtual PMD behaves in accordance with enabled promiscuous mode, > it should initialize it properly on init: >      eth_dev->data->promiscuous = 1; > If so, if application requires promiscuous mode, attempt to enable will > do nothing. If application requires non-promiscuous mode, disable will > fail and it is good. It is technically correct that we can't disable promiscuous mode in virtual PMDs but I think mainly we don't really care so it returning error may make the applications fail/exit unnecessarily with virtual PMDs. > >>> Signed-off-by: Ciara Power >>> --- >>> drivers/net/null/rte_eth_null.c | 14 ++++++++++++++ >>> 1 file changed, 14 insertions(+) >>> >>> diff --git a/drivers/net/null/rte_eth_null.c b/drivers/net/null/rte_eth_null.c >>> index e2ff41a22..b8472a0cf 100644 >>> --- a/drivers/net/null/rte_eth_null.c >>> +++ b/drivers/net/null/rte_eth_null.c >>> @@ -441,11 +441,25 @@ eth_mac_address_set(__rte_unused struct rte_eth_dev *dev, >>> return 0; >>> } >>> >>> +static int >>> +eth_dev_promiscuous_enable(__rte_unused struct rte_eth_dev *dev) >>> +{ >>> + return 0; >>> +} >>> + >>> +static int >>> +eth_dev_promiscuous_disable(__rte_unused struct rte_eth_dev *dev) >>> +{ >>> + return 0; >>> +} >>> + >>> static const struct eth_dev_ops ops = { >>> .dev_start = eth_dev_start, >>> .dev_stop = eth_dev_stop, >>> .dev_configure = eth_dev_configure, >>> .dev_infos_get = eth_dev_info, >>> + .promiscuous_enable = eth_dev_promiscuous_enable, >>> + .promiscuous_disable = eth_dev_promiscuous_disable, >>> .rx_queue_setup = eth_rx_queue_setup, >>> .tx_queue_setup = eth_tx_queue_setup, >>> .rx_queue_release = eth_queue_release, >>> >