From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo2-f42.google.com (mail-oo2-f42.google.com [74.125.231.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E9EAA3D0929 for ; Tue, 15 Sep 2026 02:04:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.231.170 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789437842; cv=none; b=eVnVtkKY6qNyvWRvSi46qaU3zPij6Y5z0hdBmaNZ/A0kWSm+YU26dOS8+PxsbOlNo+K6v+5Ej4Pm706JkCLSTVnSKySV26+zlt3DpNsjbFxq1hnS3p9jWCQTkCDAqNIbIxpsf7FM9eDkvf9LnqkslP3oNXp9IFzEvyIalWsEdMk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789437842; c=relaxed/simple; bh=8WdFP1v7/Oa+dKIJynboqHB29B7wDjj6AhOsc16jvtI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Vd1u+9QXIJXUCewJZqaf4O3IKDtffnJNp9AnNHM9LwTpcV6otHZGcbQijVLZqwugJwHs8dHEiz2PSz49k2WuMzjM31VGPyG3RkMpPS4o4Hop52u8aF7INw3EmUJqNCXjROyj9t+EpwHSKqqe1Y7HtoKjE8caq6y9KlR+aB702IA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=cloudflare.com; spf=pass smtp.mailfrom=cloudflare.com; dkim=pass (2048-bit key) header.d=cloudflare.com header.i=@cloudflare.com header.b=J5+fb0gC; arc=none smtp.client-ip=74.125.231.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=cloudflare.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=cloudflare.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=cloudflare.com header.i=@cloudflare.com header.b="J5+fb0gC" Received: by mail-oo2-f42.google.com with SMTP id 46e09a7af769-7f4f0d37f9dso1262669a34.1 for ; Mon, 14 Sep 2026 19:04:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cloudflare.com; s=google09082023; t=1789437840; x=1790042640; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :content-type:mime-version:subject:date:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=63GI428HLg6svgdiqmZ8ZkijlWs39+VHkT3kxwHKcMM=; b=J5+fb0gCkZb0yw0F/HqBYlxu/KDjBUXSTJOlo5Q7DqTcEfIsffH98AKU+KJJNBkcb2 xrDlOqZL1htnWA9dMZj+AGA9e/judpS9fXb5XCzs2NwADdDKuPhM1fv6w4mJGbwIYCmP Ue8jurfIsxXTRccbe8oG8ByQggVY2m6NdBlrgZhcVEDu3/mhpbVOS/yws7PGBUK6IhNJ FnqXfLrWBwvgeFIIRStjL0aAWSTZSMeuJKJzFiuz8plnrhqyyQWjkboj190yLoXREzDw qQO7pY5V1KOddeEbPTPeHhu0FnrdibWz/54CLCp/G06LgmY2cUDoFWOm4K+wHGndFiI7 Pxhg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1789437840; x=1790042640; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :content-type:mime-version:subject:date:from:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=63GI428HLg6svgdiqmZ8ZkijlWs39+VHkT3kxwHKcMM=; b=BVRGhAOznXimmkv/unThJ3ErMfv9H2xinwBNSASUS8ECgYshOGPa7hXiwqRSUrn4/W vPhUC0JA3ii8S2ohY2FsP+VDTdf+CfXl5a7CijuPJ2Ak93dr6yL/XlLuG1t2JxqTnJG4 /B8JE59j4NwxHQt4CH5YLYji63WHNeyIvqPfE2K7CGWEi725VMhBWz/tao5ZRZCLvVKw 4gvLXqGatQQGh8b4x8Zn0BVOe7hAQhRXqcqCJMV4o6Fd2+LczbpRN1fI/nCjSLRgbXOO WBk59nKvx5ZA7QTTHK7rIiLx77KsO93Kv3ziXGxi6Gn0nxyV52+xpKrXFK8vced4p9K0 L6gA== X-Gm-Message-State: AFuF++kdWl2d65VwXVl0itvrTYONocNO725T68k8TaeytXikl3RcATF4 E+vjO9blyZV5jX8cVAyi0cy5yrqut4SvuOICJVGO2o8q7wlSc7aZ9IlJnf/44SWvfOY= X-Gm-Gg: AYBFou0Apvm3MKVsp8FGopJNwND+27xzNjatD2I79o/iwyCZlrcqxc/+SGp13PD2H76 6v46etu96q5t7DMaToiD32DeDRpdRUrtWupFYqZVI5gprXmjbrSgFg43z7zUZQBIGmpiE+/7uJo gjulgZOaPkUlqLxKqqmOZfV4NFg/CnmFZsZB/+C58mT0wpV5frfz1AhJhjFvIFo+FgZJPrbYBLb S3WDCjXHOY80mKTGgjGkuLuBeHJnG3eyhLs0JAeCGUgqsvvpUeLWRYA0lDGnROhra4giKrNjnHU AOgkLoA+D8mA+6Hkgz8gINB5E11thT5NfIekVHiXPd16RgF4dCWTx8PATQd76pIXx0w8TRwHbx/ 0uc70kCi+zAgGE2+1A046QsTWrcTDRm6yA7X743XvbnzfvEhhwHM2N9W9rOmEeINnhOG9Pg9I5R 2C15znrgg7LBqF6Wlog3pLvMu4scHsjbMvCwOZRYEWqeSw08GdUrxcVydBNUnA X-Received: by 2002:a05:6830:2b25:b0:7f4:bd7e:1394 with SMTP id 46e09a7af769-8089709640emr3666718a34.1.1789437839686; Mon, 14 Sep 2026 19:03:59 -0700 (PDT) Received: from [127.0.1.1] ([2a09:bac6:bf21:2e46::49c:4c]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-804de582afcsm10795696a34.16.2026.09.14.19.03.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Sep 2026 19:03:58 -0700 (PDT) From: Chris J Arges Date: Mon, 14 Sep 2026 21:03:37 -0500 Subject: [PATCH net-next v2 3/3] selftests: net: cover IPv6 uncached route device mismatch Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260914-hash-bucket-route-lists-v2-3-29f6297d8a5a@cloudflare.com> References: <20260914-hash-bucket-route-lists-v2-0-29f6297d8a5a@cloudflare.com> In-Reply-To: <20260914-hash-bucket-route-lists-v2-0-29f6297d8a5a@cloudflare.com> To: David Ahern , Ido Schimmel , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Shuah Khan Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, kernel-team@cloudflare.com, Chris J Arges X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=openssh-sha256; t=1789437828; l=2338; i=carges@cloudflare.com; h=from:subject:message-id; bh=8WdFP1v7/Oa+dKIJynboqHB29B7wDjj6AhOsc16jvtI=; b=U1NIU0lHAAAAAQAAADMAAAALc3NoLWVkMjU1MTkAAAAgaxY1IIT5oTohBZJmhnVgJo2HsM7Sv 9I0LdJCgpeGX6gAAAAGcGF0YXR0AAAAAAAAAAZzaGE1MTIAAABTAAAAC3NzaC1lZDI1NTE5AAAA QB1uSHqNTuHSEUu0oOnVIk7OUTk3RZzaswZwmFCmorRKp9gGkFSsUhv6PRzmEUm+JAD+57TJR82 YoQmqb3O9bwE= X-Developer-Key: i=carges@cloudflare.com; a=openssh; fpr=SHA256:Cun99EBiH0EV7wvmfTBF9eDrld2NJx+aD4ScWZ45Q5M Local IPv6 routes through a VRF can use the VRF as dst.dev while retaining the VRF member interface in rt6i_idev. Exercise device teardown while such uncached routes are retained by a delayed qdisc. Reuse the existing VRF topology and msg_zerocopy raw-header sender, and verify route creation, qdisc retention, and prompt interface deletion. Signed-off-by: Chris J Arges --- tools/testing/selftests/net/vrf-xfrm-tests.sh | 35 +++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/tools/testing/selftests/net/vrf-xfrm-tests.sh b/tools/testing/selftests/net/vrf-xfrm-tests.sh index b64dd891699d..4f409d135a99 100755 --- a/tools/testing/selftests/net/vrf-xfrm-tests.sh +++ b/tools/testing/selftests/net/vrf-xfrm-tests.sh @@ -385,6 +385,37 @@ run_tests() cleanup_xfrm_dev } +test_ipv6_uncached_mismatch() +{ + local sender_pid + local backlog + local rc + + # A local route through a VRF uses the VRF as dst.dev while retaining + # the VRF member interface in rt6i_idev. Raw header sends create uncached + # routes, and netem keeps them referenced while the interface is deleted. + run_cmd_host1 tc qdisc replace dev ${VRF} root netem limit 1 delay 10s + ip -6 -netns "$host1" route add local ${HOST1_6}/128 dev eth0 + ip netns exec "$host1" ./msg_zerocopy -6 \ + -S ${HOST1_6} -D ${HOST1_6} -s 1200 -t 0 raw_hdrincl \ + >/dev/null 2>&1 & + sender_pid=$! + wait "$sender_pid" + rc=$? + log_test $rc 0 "Create uncached IPv6 routes with mismatched devices" + [ $rc -ne 0 ] && return + + backlog=$(ip netns exec "$host1" tc -s qdisc show dev ${VRF}) + if ! echo "$backlog" | grep -Eq 'backlog .* [1-9][0-9]*p'; then + log_test 1 0 "Retain uncached IPv6 routes in VRF qdisc" + return + fi + log_test 0 0 "Retain uncached IPv6 routes in VRF qdisc" + + run_cmd_host1 timeout 2 ip link del eth0 + log_test $? 0 "Flush uncached IPv6 routes with mismatched devices" +} + ################################################################################ # usage @@ -425,6 +456,10 @@ echo echo "netem qdisc on VRF device" run_tests +echo +echo "Uncached IPv6 route with mismatched devices" +test_ipv6_uncached_mismatch + printf "\nTests passed: %3d\n" ${nsuccess} printf "Tests failed: %3d\n" ${nfail} -- 2.43.0