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Miller" , Jakub Kicinski , Petar Penkov , Lorenz Bauer , Eric Dumazet , Maxim Mikityanskiy Subject: [PATCH bpf v2 3/4] bpf: Use EOPNOTSUPP in bpf_tcp_check_syncookie Date: Mon, 24 Jan 2022 17:11:45 +0200 Message-ID: <20220124151146.376446-4-maximmi@nvidia.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220124151146.376446-1-maximmi@nvidia.com> References: <20220124151146.376446-1-maximmi@nvidia.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 5adb986a-de79-4429-cf14-08d9df4c07a8 X-MS-TrafficTypeDiagnostic: MW2PR12MB2409:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:5797; 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:12.22.5.235;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:mail.nvidia.com;PTR:InfoNoRecords;CAT:NONE;SFS:(4636009)(40470700004)(46966006)(36840700001)(2616005)(426003)(82310400004)(508600001)(5660300002)(70206006)(81166007)(36756003)(8676002)(47076005)(26005)(86362001)(336012)(8936002)(7416002)(1076003)(107886003)(36860700001)(40460700003)(2906002)(83380400001)(4744005)(110136005)(186003)(7696005)(54906003)(70586007)(6666004)(356005)(316002)(4326008)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Jan 2022 15:13:08.6773 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5adb986a-de79-4429-cf14-08d9df4c07a8 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[12.22.5.235];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT037.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW2PR12MB2409 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org When CONFIG_SYN_COOKIES is off, bpf_tcp_check_syncookie returns ENOTSUPP. It's a non-standard and deprecated code. The related function bpf_tcp_gen_syncookie and most of the other functions use EOPNOTSUPP if some feature is not available. This patch changes ENOTSUPP to EOPNOTSUPP in bpf_tcp_check_syncookie. Fixes: 399040847084 ("bpf: add helper to check for a valid SYN cookie") Signed-off-by: Maxim Mikityanskiy Reviewed-by: Tariq Toukan --- net/core/filter.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/core/filter.c b/net/core/filter.c index 780e635fb52a..2c9106704821 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -6814,7 +6814,7 @@ BPF_CALL_5(bpf_tcp_check_syncookie, struct sock *, sk, void *, iph, u32, iph_len return -ENOENT; #else - return -ENOTSUPP; + return -EOPNOTSUPP; #endif } -- 2.30.2