Selftests are supposed to run on any kernels, including the old ones not
supporting all MPTCP features.
Some tests are using IPTables and/or TC commands to force some
behaviours. If one of these commands fails -- likely because some
features are not available -- we should intercept the error and skip the
tests requiring these features.
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.
Link: https://github.com/multipath-tcp/mptcp_net-next/issues/368
Fixes: 8d014eaa9254 ("selftests: mptcp: add ADD_ADDR timeout test case")
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
---
tools/testing/selftests/net/mptcp/mptcp_join.sh | 88 ++++++++++++++++---------
1 file changed, 57 insertions(+), 31 deletions(-)
diff --git a/tools/testing/selftests/net/mptcp/mptcp_join.sh b/tools/testing/selftests/net/mptcp/mptcp_join.sh
index 73c513f1e808..2ae6d99f3eb9 100755
--- a/tools/testing/selftests/net/mptcp/mptcp_join.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh
@@ -288,11 +288,15 @@ reset_with_add_addr_timeout()
fi
ip netns exec $ns1 sysctl -q net.mptcp.add_addr_timeout=1
- ip netns exec $ns2 $tables -A OUTPUT -p tcp \
- -m tcp --tcp-option 30 \
- -m bpf --bytecode \
- "$CBPF_MPTCP_SUBOPTION_ADD_ADDR" \
- -j DROP
+
+ if ! ip netns exec $ns2 $tables -A OUTPUT -p tcp \
+ -m tcp --tcp-option 30 \
+ -m bpf --bytecode \
+ "$CBPF_MPTCP_SUBOPTION_ADD_ADDR" \
+ -j DROP; then
+ mark_as_skipped "unable to set the 'add addr' rule"
+ return 1
+ fi
}
# $1: test name
@@ -336,17 +340,12 @@ reset_with_allow_join_id0()
# tc action pedit offset 162 out of bounds
#
# Netfilter is used to mark packets with enough data.
-reset_with_fail()
+setup_fail_rules()
{
- reset "${1}" || return 1
-
- ip netns exec $ns1 sysctl -q net.mptcp.checksum_enabled=1
- ip netns exec $ns2 sysctl -q net.mptcp.checksum_enabled=1
-
check_invert=1
validate_checksum=1
- local i="$2"
- local ip="${3:-4}"
+ local i="$1"
+ local ip="${2:-4}"
local tables
tables="${iptables}"
@@ -361,15 +360,32 @@ reset_with_fail()
-p tcp \
-m length --length 150:9999 \
-m statistic --mode nth --packet 1 --every 99999 \
- -j MARK --set-mark 42 || exit 1
+ -j MARK --set-mark 42 || return ${ksft_skip}
- tc -n $ns2 qdisc add dev ns2eth$i clsact || exit 1
+ tc -n $ns2 qdisc add dev ns2eth$i clsact || return ${ksft_skip}
tc -n $ns2 filter add dev ns2eth$i egress \
protocol ip prio 1000 \
handle 42 fw \
action pedit munge offset 148 u8 invert \
pipe csum tcp \
- index 100 || exit 1
+ index 100 || return ${ksft_skip}
+}
+
+reset_with_fail()
+{
+ reset "${1}" || return 1
+ shift
+
+ ip netns exec $ns1 sysctl -q net.mptcp.checksum_enabled=1
+ ip netns exec $ns2 sysctl -q net.mptcp.checksum_enabled=1
+
+ local rc=0
+ setup_fail_rules "${@}" || rc=$?
+
+ if [ ${rc} -eq ${ksft_skip} ]; then
+ mark_as_skipped "unable to set the 'fail' rules"
+ return 1
+ fi
}
reset_with_events()
@@ -384,6 +400,25 @@ reset_with_events()
evts_ns2_pid=$!
}
+reset_with_tcp_filter()
+{
+ reset "${1}" || return 1
+ shift
+
+ local ns="${!1}"
+ local src="${2}"
+ local target="${3}"
+
+ if ! ip netns exec "${ns}" ${iptables} \
+ -A INPUT \
+ -s "${src}" \
+ -p tcp \
+ -j "${target}"; then
+ mark_as_skipped "unable to set the filter rules"
+ return 1
+ fi
+}
+
fail_test()
{
ret=1
@@ -750,15 +785,6 @@ pm_nl_check_endpoint()
fi
}
-filter_tcp_from()
-{
- local ns="${1}"
- local src="${2}"
- local target="${3}"
-
- ip netns exec "${ns}" ${iptables} -A INPUT -s "${src}" -p tcp -j "${target}"
-}
-
do_transfer()
{
local listener_ns="$1"
@@ -2029,23 +2055,23 @@ subflows_error_tests()
fi
# multiple subflows, with subflow creation error
- if reset "multi subflows, with failing subflow"; then
+ if reset_with_tcp_filter "multi subflows, with failing subflow" ns1 10.0.3.2 REJECT &&
+ continue_if mptcp_lib_kallsyms_has "mptcp_pm_subflow_check_next$"; then
pm_nl_set_limits $ns1 0 2
pm_nl_set_limits $ns2 0 2
pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
pm_nl_add_endpoint $ns2 10.0.2.2 flags subflow
- filter_tcp_from $ns1 10.0.3.2 REJECT
run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow
chk_join_nr 1 1 1
fi
# multiple subflows, with subflow timeout on MPJ
- if reset "multi subflows, with subflow timeout"; then
+ if reset_with_tcp_filter "multi subflows, with subflow timeout" ns1 10.0.3.2 DROP &&
+ continue_if mptcp_lib_kallsyms_has "mptcp_pm_subflow_check_next$"; then
pm_nl_set_limits $ns1 0 2
pm_nl_set_limits $ns2 0 2
pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
pm_nl_add_endpoint $ns2 10.0.2.2 flags subflow
- filter_tcp_from $ns1 10.0.3.2 DROP
run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow
chk_join_nr 1 1 1
fi
@@ -2053,11 +2079,11 @@ subflows_error_tests()
# multiple subflows, check that the endpoint corresponding to
# closed subflow (due to reset) is not reused if additional
# subflows are added later
- if reset "multi subflows, fair usage on close"; then
+ if reset_with_tcp_filter "multi subflows, fair usage on close" ns1 10.0.3.2 REJECT &&
+ continue_if mptcp_lib_kallsyms_has "mptcp_pm_subflow_check_next$"; then
pm_nl_set_limits $ns1 0 1
pm_nl_set_limits $ns2 0 1
pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
- filter_tcp_from $ns1 10.0.3.2 REJECT
run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow &
# mpj subflow will be in TW after the reset
--
2.39.2