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Message-ID: <20240514071130.2121042-1-liuhangbin@gmail.com>
Date: Tue, 14 May 2024 15:11:30 +0800
From: Hangbin Liu <liuhangbin@...il.com>
To: netdev@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Shuah Khan <shuah@...nel.org>,
Hangbin Liu <liuhangbin@...il.com>,
Petr Machata <petrm@...dia.com>,
Ido Schimmel <idosch@...dia.com>,
Benjamin Poirier <bpoirier@...dia.com>,
Tobias Waldekranz <tobias@...dekranz.com>,
Jaehee Park <jhpark1013@...il.com>,
linux-kselftest@...r.kernel.org
Subject: [PATCH net] selftests/net: use tc rule to filter the na packet
Test arp_ndisc_untracked_subnets use tcpdump to filter the unsolicited
and untracked na messages. It set -e before calling tcpdump. But if
tcpdump filters 0 packet, it will return none zero, and cause the script
to exit.
Instead of using slow tcpdump to capture packets, let's using tc rule
to filter out the na message.
At the same time, fix function setup_v6 which only needs one parameter.
Move all the related helpers from forwarding lib.sh to net lib.sh.
Fixes: 0ea7b0a454ca ("selftests: net: arp_ndisc_untracked_subnets: test for arp_accept and accept_untracked_na")
Signed-off-by: Hangbin Liu <liuhangbin@...il.com>
---
Hi Jakub, would you please help check if this fix the
arp_ndisc_untracked_subnets flake issue on debug kernel?
---
.../net/arp_ndisc_untracked_subnets.sh | 53 +++++--------
tools/testing/selftests/net/forwarding/lib.sh | 76 -------------------
tools/testing/selftests/net/lib.sh | 76 +++++++++++++++++++
3 files changed, 93 insertions(+), 112 deletions(-)
diff --git a/tools/testing/selftests/net/arp_ndisc_untracked_subnets.sh b/tools/testing/selftests/net/arp_ndisc_untracked_subnets.sh
index a40c0e9bd023..eef5cbf6eecc 100755
--- a/tools/testing/selftests/net/arp_ndisc_untracked_subnets.sh
+++ b/tools/testing/selftests/net/arp_ndisc_untracked_subnets.sh
@@ -73,25 +73,19 @@ setup_v6() {
# namespaces. veth0 is veth-router, veth1 is veth-host.
# first, set up the inteface's link to the namespace
# then, set the interface "up"
- ip -6 -netns ${ROUTER_NS_V6} link add name ${ROUTER_INTF} \
- type veth peer name ${HOST_INTF}
-
- ip -6 -netns ${ROUTER_NS_V6} link set dev ${ROUTER_INTF} up
- ip -6 -netns ${ROUTER_NS_V6} link set dev ${HOST_INTF} netns \
- ${HOST_NS_V6}
+ ip -n ${ROUTER_NS_V6} link add name ${ROUTER_INTF} \
+ type veth peer name ${HOST_INTF} netns ${HOST_NS_V6}
- ip -6 -netns ${HOST_NS_V6} link set dev ${HOST_INTF} up
- ip -6 -netns ${ROUTER_NS_V6} addr add \
- ${ROUTER_ADDR_V6}/${PREFIX_WIDTH_V6} dev ${ROUTER_INTF} nodad
+ # Add tc rule to filter out host na message
+ tc -n ${ROUTER_NS_V6} qdisc add dev ${ROUTER_INTF} clsact
+ tc -n ${ROUTER_NS_V6} filter add dev ${ROUTER_INTF} \
+ ingress protocol ipv6 pref 1 handle 101 \
+ flower src_ip ${HOST_ADDR_V6} ip_proto icmpv6 type 136 skip_hw action pass
HOST_CONF=net.ipv6.conf.${HOST_INTF}
ip netns exec ${HOST_NS_V6} sysctl -qw ${HOST_CONF}.ndisc_notify=1
ip netns exec ${HOST_NS_V6} sysctl -qw ${HOST_CONF}.disable_ipv6=0
- ip -6 -netns ${HOST_NS_V6} addr add ${HOST_ADDR_V6}/${PREFIX_WIDTH_V6} \
- dev ${HOST_INTF}
-
ROUTER_CONF=net.ipv6.conf.${ROUTER_INTF}
-
ip netns exec ${ROUTER_NS_V6} sysctl -w \
${ROUTER_CONF}.forwarding=1 >/dev/null 2>&1
ip netns exec ${ROUTER_NS_V6} sysctl -w \
@@ -99,6 +93,13 @@ setup_v6() {
ip netns exec ${ROUTER_NS_V6} sysctl -w \
${ROUTER_CONF}.accept_untracked_na=${accept_untracked_na} \
>/dev/null 2>&1
+
+ ip -n ${ROUTER_NS_V6} link set dev ${ROUTER_INTF} up
+ ip -n ${HOST_NS_V6} link set dev ${HOST_INTF} up
+ ip -n ${ROUTER_NS_V6} addr add ${ROUTER_ADDR_V6}/${PREFIX_WIDTH_V6} \
+ dev ${ROUTER_INTF} nodad
+ ip -n ${HOST_NS_V6} addr add ${HOST_ADDR_V6}/${PREFIX_WIDTH_V6} \
+ dev ${HOST_INTF}
set +e
}
@@ -162,26 +163,6 @@ arp_test_gratuitous_combinations() {
arp_test_gratuitous 2 1
}
-cleanup_tcpdump() {
- set -e
- [[ ! -z ${tcpdump_stdout} ]] && rm -f ${tcpdump_stdout}
- [[ ! -z ${tcpdump_stderr} ]] && rm -f ${tcpdump_stderr}
- tcpdump_stdout=
- tcpdump_stderr=
- set +e
-}
-
-start_tcpdump() {
- set -e
- tcpdump_stdout=`mktemp`
- tcpdump_stderr=`mktemp`
- ip netns exec ${ROUTER_NS_V6} timeout 15s \
- tcpdump --immediate-mode -tpni ${ROUTER_INTF} -c 1 \
- "icmp6 && icmp6[0] == 136 && src ${HOST_ADDR_V6}" \
- > ${tcpdump_stdout} 2> /dev/null
- set +e
-}
-
verify_ndisc() {
local accept_untracked_na=$1
local same_subnet=$2
@@ -222,8 +203,9 @@ ndisc_test_untracked_advertisements() {
HOST_ADDR_V6=2001:db8:abcd:0012::3
fi
fi
- setup_v6 $1 $2
- start_tcpdump
+ setup_v6 $1
+ slowwait_for_counter 15 1 \
+ tc_rule_handle_stats_get "dev ${ROUTER_INTF} ingress" 101 ".packets" "-n ${ROUTER_NS_V6}"
if verify_ndisc $1 $2; then
printf " TEST: %-60s [ OK ]\n" "${test_msg[*]}"
@@ -231,7 +213,6 @@ ndisc_test_untracked_advertisements() {
printf " TEST: %-60s [FAIL]\n" "${test_msg[*]}"
fi
- cleanup_tcpdump
cleanup_v6
set +e
}
diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh
index e579c2e0c462..746161400a7c 100644
--- a/tools/testing/selftests/net/forwarding/lib.sh
+++ b/tools/testing/selftests/net/forwarding/lib.sh
@@ -38,32 +38,6 @@ fi
source "$net_forwarding_dir/../lib.sh"
-# timeout in seconds
-slowwait()
-{
- local timeout=$1; shift
-
- local start_time="$(date -u +%s)"
- while true
- do
- local out
- out=$("$@")
- local ret=$?
- if ((!ret)); then
- echo -n "$out"
- return 0
- fi
-
- local current_time="$(date -u +%s)"
- if ((current_time - start_time > timeout)); then
- echo -n "$out"
- return 1
- fi
-
- sleep 0.1
- done
-}
-
##############################################################################
# Sanity checks
@@ -487,33 +461,6 @@ wait_for_trap()
"$@" | grep -q trap
}
-until_counter_is()
-{
- local expr=$1; shift
- local current=$("$@")
-
- echo $((current))
- ((current $expr))
-}
-
-busywait_for_counter()
-{
- local timeout=$1; shift
- local delta=$1; shift
-
- local base=$("$@")
- busywait "$timeout" until_counter_is ">= $((base + delta))" "$@"
-}
-
-slowwait_for_counter()
-{
- local timeout=$1; shift
- local delta=$1; shift
-
- local base=$("$@")
- slowwait "$timeout" until_counter_is ">= $((base + delta))" "$@"
-}
-
setup_wait_dev()
{
local dev=$1; shift
@@ -819,29 +766,6 @@ link_stats_rx_errors_get()
link_stats_get $1 rx errors
}
-tc_rule_stats_get()
-{
- local dev=$1; shift
- local pref=$1; shift
- local dir=$1; shift
- local selector=${1:-.packets}; shift
-
- tc -j -s filter show dev $dev ${dir:-ingress} pref $pref \
- | jq ".[1].options.actions[].stats$selector"
-}
-
-tc_rule_handle_stats_get()
-{
- local id=$1; shift
- local handle=$1; shift
- local selector=${1:-.packets}; shift
- local netns=${1:-""}; shift
-
- tc $netns -j -s filter show $id \
- | jq ".[] | select(.options.handle == $handle) | \
- .options.actions[0].stats$selector"
-}
-
ethtool_stats_get()
{
local dev=$1; shift
diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh
index f9fe182dfbd4..90410b8f3d32 100644
--- a/tools/testing/selftests/net/lib.sh
+++ b/tools/testing/selftests/net/lib.sh
@@ -37,6 +37,59 @@ busywait()
done
}
+# timeout in seconds
+slowwait()
+{
+ local timeout=$1; shift
+
+ local start_time="$(date -u +%s)"
+ while true
+ do
+ local out
+ out=$("$@")
+ local ret=$?
+ if ((!ret)); then
+ echo -n "$out"
+ return 0
+ fi
+
+ local current_time="$(date -u +%s)"
+ if ((current_time - start_time > timeout)); then
+ echo -n "$out"
+ return 1
+ fi
+
+ sleep 0.1
+ done
+}
+
+until_counter_is()
+{
+ local expr=$1; shift
+ local current=$("$@")
+
+ echo $((current))
+ ((current $expr))
+}
+
+busywait_for_counter()
+{
+ local timeout=$1; shift
+ local delta=$1; shift
+
+ local base=$("$@")
+ busywait "$timeout" until_counter_is ">= $((base + delta))" "$@"
+}
+
+slowwait_for_counter()
+{
+ local timeout=$1; shift
+ local delta=$1; shift
+
+ local base=$("$@")
+ slowwait "$timeout" until_counter_is ">= $((base + delta))" "$@"
+}
+
cleanup_ns()
{
local ns=""
@@ -94,3 +147,26 @@ setup_ns()
done
NS_LIST="$NS_LIST $ns_list"
}
+
+tc_rule_stats_get()
+{
+ local dev=$1; shift
+ local pref=$1; shift
+ local dir=$1; shift
+ local selector=${1:-.packets}; shift
+
+ tc -j -s filter show dev $dev ${dir:-ingress} pref $pref \
+ | jq ".[1].options.actions[].stats$selector"
+}
+
+tc_rule_handle_stats_get()
+{
+ local id=$1; shift
+ local handle=$1; shift
+ local selector=${1:-.packets}; shift
+ local netns=${1:-""}; shift
+
+ tc $netns -j -s filter show $id \
+ | jq ".[] | select(.options.handle == $handle) | \
+ .options.actions[0].stats$selector"
+}
--
2.43.0
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