From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A8E5911CAB for ; Mon, 26 Jun 2023 18:44:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 27F53C433C0; Mon, 26 Jun 2023 18:44:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687805057; bh=x4B5VUxdpBRZZzL6sMJR3BnF8QzAMDxABARCQXOtAtE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IOOlUXQZPFQcDQbBl6T8PKxXn7PFBo2qJogBeUEjaxJVkKsLUsu1Gn5RnPEk8y837 ny/BzTeVjQ5aVh+y+rrHQiIAsRnT4hs54jBtBpfO5+dFDlihRbmfTyDJnVA6NQqBJP acaOS1sR5is1AP6ypOR97FWuyn5I3bH+1I2meaUo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Matthieu Baerts , Jakub Kicinski Subject: [PATCH 5.10 08/81] selftests: mptcp: join: skip check if MIB counter not supported Date: Mon, 26 Jun 2023 20:11:50 +0200 Message-ID: <20230626180744.791244828@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230626180744.453069285@linuxfoundation.org> References: <20230626180744.453069285@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Matthieu Baerts commit 47867f0a7e831e24e5eab3330667ce9682d50fb1 upstream. Selftests are supposed to run on any kernels, including the old ones not supporting all MPTCP features. One of them is the MPTCP MIB counters introduced in commit fc518953bc9c ("mptcp: add and use MIB counter infrastructure") and more later. The MPTCP Join selftest heavily relies on these counters. If a counter is not supported by the kernel, it is not displayed when using 'nstat -z'. We can then detect that and skip the verification. A new helper (get_counter()) has been added to do the required checks and return an error if the counter is not available. Note that if we expect to have these features available and if SELFTESTS_MPTCP_LIB_EXPECT_ALL_FEATURES env var is set to 1, the tests will be marked as failed instead of skipped. This new helper also makes sure we get the exact counter we want to avoid issues we had in the past, e.g. with MPTcpExtRmAddr and MPTcpExtRmAddrDrop sharing the same prefix. While at it, we uniform the way we fetch a MIB counter. Note for the backports: we rarely change these modified blocks so if there is are conflicts, it is very likely because a counter is not used in the older kernels and we don't need that chunk. Link: https://github.com/multipath-tcp/mptcp_net-next/issues/368 Fixes: b08fbf241064 ("selftests: add test-cases for MPTCP MP_JOIN") Cc: stable@vger.kernel.org Signed-off-by: Matthieu Baerts Signed-off-by: Jakub Kicinski Signed-off-by: Matthieu Baerts Signed-off-by: Greg Kroah-Hartman --- tools/testing/selftests/net/mptcp/mptcp_join.sh | 65 ++++++++++++++++-------- 1 file changed, 44 insertions(+), 21 deletions(-) --- a/tools/testing/selftests/net/mptcp/mptcp_join.sh +++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh @@ -130,6 +130,22 @@ do_ping() fi } +# $1: ns ; $2: counter +get_counter() +{ + local ns="${1}" + local counter="${2}" + local count + + count=$(ip netns exec ${ns} nstat -asz "${counter}" | awk 'NR==1 {next} {print $2}') + if [ -z "${count}" ]; then + mptcp_lib_fail_if_expected_feature "${counter} counter" + return 1 + fi + + echo "${count}" +} + do_transfer() { listener_ns="$1" @@ -291,9 +307,10 @@ chk_join_nr() local dump_stats printf "%02u %-36s %s" "$TEST_COUNT" "$msg" "syn" - count=`ip netns exec $ns1 nstat -as | grep MPTcpExtMPJoinSynRx | awk '{print $2}'` - [ -z "$count" ] && count=0 - if [ "$count" != "$syn_nr" ]; then + count=$(get_counter ${ns1} "MPTcpExtMPJoinSynRx") + if [ -z "$count" ]; then + echo -n "[skip]" + elif [ "$count" != "$syn_nr" ]; then echo "[fail] got $count JOIN[s] syn expected $syn_nr" ret=1 dump_stats=1 @@ -302,9 +319,10 @@ chk_join_nr() fi echo -n " - synack" - count=`ip netns exec $ns2 nstat -as | grep MPTcpExtMPJoinSynAckRx | awk '{print $2}'` - [ -z "$count" ] && count=0 - if [ "$count" != "$syn_ack_nr" ]; then + count=$(get_counter ${ns2} "MPTcpExtMPJoinSynAckRx") + if [ -z "$count" ]; then + echo -n "[skip]" + elif [ "$count" != "$syn_ack_nr" ]; then echo "[fail] got $count JOIN[s] synack expected $syn_ack_nr" ret=1 dump_stats=1 @@ -313,9 +331,10 @@ chk_join_nr() fi echo -n " - ack" - count=`ip netns exec $ns1 nstat -as | grep MPTcpExtMPJoinAckRx | awk '{print $2}'` - [ -z "$count" ] && count=0 - if [ "$count" != "$ack_nr" ]; then + count=$(get_counter ${ns1} "MPTcpExtMPJoinAckRx") + if [ -z "$count" ]; then + echo "[skip]" + elif [ "$count" != "$ack_nr" ]; then echo "[fail] got $count JOIN[s] ack expected $ack_nr" ret=1 dump_stats=1 @@ -338,9 +357,10 @@ chk_add_nr() local dump_stats printf "%-39s %s" " " "add" - count=`ip netns exec $ns2 nstat -as | grep MPTcpExtAddAddr | awk '{print $2}'` - [ -z "$count" ] && count=0 - if [ "$count" != "$add_nr" ]; then + count=$(get_counter ${ns2} "MPTcpExtAddAddr") + if [ -z "$count" ]; then + echo -n "[skip]" + elif [ "$count" != "$add_nr" ]; then echo "[fail] got $count ADD_ADDR[s] expected $add_nr" ret=1 dump_stats=1 @@ -349,9 +369,10 @@ chk_add_nr() fi echo -n " - echo " - count=`ip netns exec $ns1 nstat -as | grep MPTcpExtEchoAdd | awk '{print $2}'` - [ -z "$count" ] && count=0 - if [ "$count" != "$echo_nr" ]; then + count=$(get_counter ${ns1} "MPTcpExtEchoAdd") + if [ -z "$count" ]; then + echo "[skip]" + elif [ "$count" != "$echo_nr" ]; then echo "[fail] got $count ADD_ADDR echo[s] expected $echo_nr" ret=1 dump_stats=1 @@ -375,9 +396,10 @@ chk_rm_nr() local dump_stats printf "%-39s %s" " " "rm " - count=`ip netns exec $ns1 nstat -as | grep MPTcpExtRmAddr | awk '{print $2}'` - [ -z "$count" ] && count=0 - if [ "$count" != "$rm_addr_nr" ]; then + count=$(get_counter ${ns1} "MPTcpExtRmAddr") + if [ -z "$count" ]; then + echo -n "[skip]" + elif [ "$count" != "$rm_addr_nr" ]; then echo "[fail] got $count RM_ADDR[s] expected $rm_addr_nr" ret=1 dump_stats=1 @@ -386,9 +408,10 @@ chk_rm_nr() fi echo -n " - sf " - count=`ip netns exec $ns2 nstat -as | grep MPTcpExtRmSubflow | awk '{print $2}'` - [ -z "$count" ] && count=0 - if [ "$count" != "$rm_subflow_nr" ]; then + count=$(get_counter ${ns2} "MPTcpExtRmSubflow") + if [ -z "$count" ]; then + echo "[skip]" + elif [ "$count" != "$rm_subflow_nr" ]; then echo "[fail] got $count RM_SUBFLOW[s] expected $rm_subflow_nr" ret=1 dump_stats=1