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emacs 28.1 From: Petr Machata To: Daniel Machon CC: , , , , , , Subject: Re: [PATCH iproute2-next v2 1/2] dcb: add new pcp-prio parameter to dcb app Date: Tue, 29 Nov 2022 10:35:08 +0100 In-Reply-To: <20221128123817.2031745-2-daniel.machon@microchip.com> Message-ID: <87wn7ef6ai.fsf@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.126.230.35] X-ClientProxiedBy: rnnvmail202.nvidia.com (10.129.68.7) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6NAM11FT010:EE_|CY5PR12MB6549:EE_ X-MS-Office365-Filtering-Correlation-Id: 68a2746b-1c7f-41a6-9ec1-08dad1edb1f7 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230022)(4636009)(39860400002)(376002)(396003)(346002)(136003)(451199015)(40470700004)(46966006)(36840700001)(54906003)(86362001)(16526019)(186003)(6916009)(316002)(336012)(2616005)(478600001)(8676002)(6666004)(26005)(8936002)(82740400003)(4326008)(5660300002)(41300700001)(36860700001)(7636003)(70206006)(70586007)(356005)(40460700003)(426003)(47076005)(2906002)(82310400005)(40480700001)(36756003);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Nov 2022 09:40:04.8189 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 68a2746b-1c7f-41a6-9ec1-08dad1edb1f7 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT010.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY5PR12MB6549 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Daniel Machon writes: > Add new pcp-prio parameter to the app subcommand, which can be used to > classify traffic based on PCP and DEI from the VLAN header. PCP and DEI > is specified in a combination of numerical and symbolic form, where 'de' > (drop-eligible) means DEI=1 and 'nd' (not-drop-eligible) means DEI=0. > > Map PCP 1 and DEI 0 to priority 1 > $ dcb app add dev eth0 pcp-prio 1nd:1 > > Map PCP 1 and DEI 1 to priority 1 > $ dcb app add dev eth0 pcp-prio 1de:1 > > Internally, PCP and DEI is encoded in the protocol field of the dcb_app > struct. Each combination of PCP and DEI maps to a priority, thus needing > a range of 0-15. A well formed dcb_app entry for PCP/DEI > prioritization, could look like: > > struct dcb_app pcp = { > .selector = DCB_APP_SEL_PCP, > .priority = 7, > .protocol = 15 > } > > For mapping PCP=7 and DEI=1 to Prio=7. > > Also, three helper functions for translating between std and non-std APP > selectors, have been added to dcb_app.c and exposed through dcb.h. > > Signed-off-by: Daniel Machon Reviewed-by: Petr Machata