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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , John Johansen , Paul Moore , James Morris , "Serge E. Hallyn" , Stephen Smalley , Eric Paris , Mykola Lysenko , Shuah Khan , Simon Horman Cc: Geliang Tang , bpf@vger.kernel.org, netdev@vger.kernel.org, mptcp@lists.linux.dev, apparmor@lists.ubuntu.com, linux-security-module@vger.kernel.org, selinux@vger.kernel.org, linux-kselftest@vger.kernel.org, Yonghong Song Subject: [PATCH mptcp-next v12 2/5] selftests/bpf: Use random netns name for mptcp Date: Mon, 7 Aug 2023 14:22:42 +0800 Message-Id: <426ed18fcb9adb39bfc96cb444cc56636377c5f8.1691388735.git.geliang.tang@suse.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: References: X-ClientProxiedBy: SI2P153CA0019.APCP153.PROD.OUTLOOK.COM (2603:1096:4:190::10) To HE1PR0402MB3497.eurprd04.prod.outlook.com (2603:10a6:7:83::14) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: HE1PR0402MB3497:EE_|AS8PR04MB8883:EE_ X-MS-Office365-Filtering-Correlation-Id: 82f9c0c8-4587-4906-a86f-08db970eb783 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: Qbx6crfozXx14iENjQv/Af5Pdp8wT9ADuCXmeNHWXLPHtw6qmQ7fmIafXTARTwkuVX4dw6ZiiPVxU+z3cHHWzUiXN982XCoLLbenlxIKLQpeErvrqEithTqmOCrydK/FIK8vTJtcLSCX5YbPzE6078zxWcD4shm/lYydbZy/wr2/u4cqPueu8WCDm+YobDptGNLqxJQDbVKJWnZldePeKyI0hK+n5h4FuiIuXvKMYgQ0yG2R/ETRsNO9S//F85pelk00pyl3U9tDawA/2vKsfWsyTDMZxAZds97UGAJ5Rf6+LfE17m2H4pJsSeeBDgeCI1Iok1NGSzeTxgwK3R3JvUsPZVKKqvxLmRlJoWIlzk7pHu/EXLfJ73NGTKee1t1rYZvpdZ7fxT1OSeMDQiZWLC4Mp7d9LE1ZTcD1vclUO7RF7hKEY+3aFLmlOJv5eMIqRvdX1h0ptZwSe8RaVdHfo6ndH/cN1yhLt9xn1+CUXIEm+mDidu0yq7WCgGtXEAXPZJOIPsteZCXdNeg+vs9/bP9+TQNS6f7Q5x9MryYRtssUX+uFqKjdaK9wvDqXKt1ZPECqpwFKYGPx38SrPRwcogeKiDCm6W1aK8Xo+qrVrdHrY3OPfyGHmQfaBcqn6wPz X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:HE1PR0402MB3497.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230028)(39860400002)(136003)(396003)(346002)(376002)(366004)(451199021)(186006)(1800799003)(2616005)(36756003)(6512007)(4326008)(316002)(86362001)(478600001)(921005)(54906003)(110136005)(38100700002)(66946007)(6666004)(6486002)(66556008)(66476007)(6506007)(41300700001)(26005)(8676002)(8936002)(2906002)(83380400001)(7416002)(7406005)(5660300002)(44832011)(17423001);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: suse.com X-MS-Exchange-CrossTenant-Network-Message-Id: 82f9c0c8-4587-4906-a86f-08db970eb783 X-MS-Exchange-CrossTenant-AuthSource: HE1PR0402MB3497.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Aug 2023 06:22:47.0041 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: f7a17af6-1c5c-4a36-aa8b-f5be247aa4ba X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 9RrXzD+ajJkcYzcwihSV+jSdwjPmAX7Slh0Yrq4vrZ30w+lG9tdBKiNVYM/GuZRmPiuGXN5oTNk25R3OrPhdjg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR04MB8883 Precedence: bulk List-ID: When running mptcp tests simultaneously, it fails sometimes with "Cannot create namespace file "/var/run/netns/mptcp_ns": File exists" errors. So this patch uses rand() to generate a random netns name instead of using the fixed name "mptcp_ns" for every test. Add "ip netns show" after "ip netns del" to check if there is a test did not clean up its netns By doing that, we can re-launch the test even if there was an issue removing the previous netns or if by accident, a netns with this generic name already existed on the system. Note that using a different name each will also help adding more subtests in future commits. Acked-by: Yonghong Song Reviewed-by: Matthieu Baerts Signed-off-by: Geliang Tang --- tools/testing/selftests/bpf/prog_tests/mptcp.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c index cd0c42fff7c0..b2d41024c6c2 100644 --- a/tools/testing/selftests/bpf/prog_tests/mptcp.c +++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c @@ -7,7 +7,7 @@ #include "network_helpers.h" #include "mptcp_sock.skel.h" -#define NS_TEST "mptcp_ns" +char NS_TEST[32]; #ifndef TCP_CA_NAME_MAX #define TCP_CA_NAME_MAX 16 @@ -147,6 +147,8 @@ static void test_base(void) if (!ASSERT_GE(cgroup_fd, 0, "test__join_cgroup")) return; + srand(time(NULL)); + snprintf(NS_TEST, sizeof(NS_TEST), "mptcp_ns_%d", rand()); SYS(fail, "ip netns add %s", NS_TEST); SYS(fail, "ip -net %s link set dev lo up", NS_TEST); @@ -178,6 +180,7 @@ static void test_base(void) close_netns(nstoken); SYS_NOFAIL("ip netns del " NS_TEST " &> /dev/null"); + SYS_NOFAIL("ip netns show %s", NS_TEST); close(cgroup_fd); }