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Message-Id: <20201119194603.103158-5-mathew.j.martineau@linux.intel.com>
Date: Thu, 19 Nov 2020 11:45:57 -0800
From: Mat Martineau <mathew.j.martineau@...ux.intel.com>
To: netdev@...r.kernel.org
Cc: Florian Westphal <fw@...len.de>, kuba@...nel.org,
mptcp@...ts.01.org, Geliang Tang <geliangtang@...il.com>,
Mat Martineau <mathew.j.martineau@...ux.intel.com>
Subject: [PATCH net-next 04/10] selftests: mptcp: add link failure test case
From: Florian Westphal <fw@...len.de>
Add a test case where a link fails with multiple subflows.
The expectation is that MPTCP will transmit any data that
could not be delivered via the failed link on another subflow.
Co-developed-by: Geliang Tang <geliangtang@...il.com>
Signed-off-by: Geliang Tang <geliangtang@...il.com>
Signed-off-by: Florian Westphal <fw@...len.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@...ux.intel.com>
---
.../testing/selftests/net/mptcp/mptcp_join.sh | 104 ++++++++++++++----
1 file changed, 82 insertions(+), 22 deletions(-)
diff --git a/tools/testing/selftests/net/mptcp/mptcp_join.sh b/tools/testing/selftests/net/mptcp/mptcp_join.sh
index 0d93b243695f..f841ed8186c1 100755
--- a/tools/testing/selftests/net/mptcp/mptcp_join.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh
@@ -5,6 +5,7 @@ ret=0
sin=""
sout=""
cin=""
+cinsent=""
cout=""
ksft_skip=4
timeout=30
@@ -81,7 +82,7 @@ cleanup_partial()
cleanup()
{
rm -f "$cin" "$cout"
- rm -f "$sin" "$sout"
+ rm -f "$sin" "$sout" "$cinsent"
cleanup_partial
}
@@ -144,6 +145,13 @@ if [ $? -ne 0 ];then
exit $ksft_skip
fi
+print_file_err()
+{
+ ls -l "$1" 1>&2
+ echo "Trailing bytes are: "
+ tail -c 27 "$1"
+}
+
check_transfer()
{
in=$1
@@ -155,6 +163,7 @@ check_transfer()
echo "[ FAIL ] $what does not match (in, out):"
print_file_err "$in"
print_file_err "$out"
+ ret=1
return 1
fi
@@ -175,6 +184,17 @@ do_ping()
fi
}
+link_failure()
+{
+ ns="$1"
+
+ l=$((RANDOM%4))
+ l=$((l+1))
+
+ veth="ns1eth$l"
+ ip -net "$ns" link set "$veth" down
+}
+
do_transfer()
{
listener_ns="$1"
@@ -182,9 +202,10 @@ do_transfer()
cl_proto="$3"
srv_proto="$4"
connect_addr="$5"
- rm_nr_ns1="$6"
- rm_nr_ns2="$7"
- speed="$8"
+ test_link_fail="$6"
+ rm_nr_ns1="$7"
+ rm_nr_ns2="$8"
+ speed="$9"
port=$((10000+$TEST_COUNT))
TEST_COUNT=$((TEST_COUNT+1))
@@ -220,7 +241,12 @@ do_transfer()
sleep 1
- ip netns exec ${connector_ns} $mptcp_connect -t $timeout -p $port -s ${cl_proto} $connect_addr < "$cin" > "$cout" &
+ if [ "$test_link_fail" -eq 0 ];then
+ ip netns exec ${connector_ns} $mptcp_connect -t $timeout -p $port -s ${cl_proto} $connect_addr < "$cin" > "$cout" &
+ else
+ ( cat "$cin" ; sleep 2; link_failure $listener_ns ; cat "$cin" ) | tee "$cinsent" | \
+ ip netns exec ${connector_ns} $mptcp_connect -t $timeout -p $port -s ${cl_proto} $connect_addr > "$cout" &
+ fi
cpid=$!
if [ $rm_nr_ns1 -gt 0 ]; then
@@ -265,12 +291,17 @@ do_transfer()
ip netns exec ${connector_ns} ss -nita 1>&2 -o "dport = :$port"
cat "$capout"
+ ret=1
return 1
fi
check_transfer $sin $cout "file received by client"
retc=$?
- check_transfer $cin $sout "file received by server"
+ if [ "$test_link_fail" -eq 0 ];then
+ check_transfer $cin $sout "file received by server"
+ else
+ check_transfer $cinsent $sout "file received by server"
+ fi
rets=$?
if [ $retc -eq 0 ] && [ $rets -eq 0 ];then
@@ -286,13 +317,12 @@ make_file()
{
name=$1
who=$2
+ size=$3
- SIZE=1
-
- dd if=/dev/urandom of="$name" bs=1024 count=$SIZE 2> /dev/null
+ dd if=/dev/urandom of="$name" bs=1024 count=$size 2> /dev/null
echo -e "\nMPTCP_TEST_FILE_END_MARKER" >> "$name"
- echo "Created $name (size $SIZE KB) containing data sent by $who"
+ echo "Created $name (size $size KB) containing data sent by $who"
}
run_tests()
@@ -300,14 +330,32 @@ run_tests()
listener_ns="$1"
connector_ns="$2"
connect_addr="$3"
- rm_nr_ns1="${4:-0}"
- rm_nr_ns2="${5:-0}"
- speed="${6:-fast}"
+ test_linkfail="${4:-0}"
+ rm_nr_ns1="${5:-0}"
+ rm_nr_ns2="${6:-0}"
+ speed="${7:-fast}"
lret=0
+ oldin=""
+
+ if [ "$test_linkfail" -eq 1 ];then
+ size=$((RANDOM%1024))
+ size=$((size+1))
+ size=$((size*128))
+
+ oldin=$(mktemp)
+ cp "$cin" "$oldin"
+ make_file "$cin" "client" $size
+ fi
do_transfer ${listener_ns} ${connector_ns} MPTCP MPTCP ${connect_addr} \
- ${rm_nr_ns1} ${rm_nr_ns2} ${speed}
+ ${test_linkfail} ${rm_nr_ns1} ${rm_nr_ns2} ${speed}
lret=$?
+
+ if [ "$test_linkfail" -eq 1 ];then
+ cp "$oldin" "$cin"
+ rm -f "$oldin"
+ fi
+
if [ $lret -ne 0 ]; then
ret=$lret
return
@@ -440,10 +488,11 @@ chk_rm_nr()
sin=$(mktemp)
sout=$(mktemp)
cin=$(mktemp)
+cinsent=$(mktemp)
cout=$(mktemp)
init
-make_file "$cin" "client"
-make_file "$sin" "server"
+make_file "$cin" "client" 1
+make_file "$sin" "server" 1
trap cleanup EXIT
run_tests $ns1 $ns2 10.0.1.1
@@ -528,12 +577,23 @@ run_tests $ns1 $ns2 10.0.1.1
chk_join_nr "multiple subflows and signal" 3 3 3
chk_add_nr 1 1
+# accept and use add_addr with additional subflows and link loss
+reset
+ip netns exec $ns1 ./pm_nl_ctl limits 0 3
+ip netns exec $ns1 ./pm_nl_ctl add 10.0.2.1 flags signal
+ip netns exec $ns2 ./pm_nl_ctl limits 1 3
+ip netns exec $ns2 ./pm_nl_ctl add 10.0.3.2 flags subflow
+ip netns exec $ns2 ./pm_nl_ctl add 10.0.4.2 flags subflow
+run_tests $ns1 $ns2 10.0.1.1 1
+chk_join_nr "multiple flows, signal, link failure" 3 3 3
+chk_add_nr 1 1
+
# add_addr timeout
reset_with_add_addr_timeout
ip netns exec $ns1 ./pm_nl_ctl limits 0 1
ip netns exec $ns2 ./pm_nl_ctl limits 1 1
ip netns exec $ns1 ./pm_nl_ctl add 10.0.2.1 flags signal
-run_tests $ns1 $ns2 10.0.1.1 0 0 slow
+run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow
chk_join_nr "signal address, ADD_ADDR timeout" 1 1 1
chk_add_nr 4 0
@@ -542,7 +602,7 @@ reset
ip netns exec $ns1 ./pm_nl_ctl limits 0 1
ip netns exec $ns2 ./pm_nl_ctl limits 0 1
ip netns exec $ns2 ./pm_nl_ctl add 10.0.3.2 flags subflow
-run_tests $ns1 $ns2 10.0.1.1 0 1 slow
+run_tests $ns1 $ns2 10.0.1.1 0 0 1 slow
chk_join_nr "remove single subflow" 1 1 1
chk_rm_nr 1 1
@@ -552,7 +612,7 @@ ip netns exec $ns1 ./pm_nl_ctl limits 0 2
ip netns exec $ns2 ./pm_nl_ctl limits 0 2
ip netns exec $ns2 ./pm_nl_ctl add 10.0.2.2 flags subflow
ip netns exec $ns2 ./pm_nl_ctl add 10.0.3.2 flags subflow
-run_tests $ns1 $ns2 10.0.1.1 0 2 slow
+run_tests $ns1 $ns2 10.0.1.1 0 0 2 slow
chk_join_nr "remove multiple subflows" 2 2 2
chk_rm_nr 2 2
@@ -561,7 +621,7 @@ reset
ip netns exec $ns1 ./pm_nl_ctl limits 0 1
ip netns exec $ns1 ./pm_nl_ctl add 10.0.2.1 flags signal
ip netns exec $ns2 ./pm_nl_ctl limits 1 1
-run_tests $ns1 $ns2 10.0.1.1 1 0 slow
+run_tests $ns1 $ns2 10.0.1.1 0 1 0 slow
chk_join_nr "remove single address" 1 1 1
chk_add_nr 1 1
chk_rm_nr 0 0
@@ -572,7 +632,7 @@ ip netns exec $ns1 ./pm_nl_ctl limits 0 2
ip netns exec $ns1 ./pm_nl_ctl add 10.0.2.1 flags signal
ip netns exec $ns2 ./pm_nl_ctl limits 1 2
ip netns exec $ns2 ./pm_nl_ctl add 10.0.3.2 flags subflow
-run_tests $ns1 $ns2 10.0.1.1 1 1 slow
+run_tests $ns1 $ns2 10.0.1.1 0 1 1 slow
chk_join_nr "remove subflow and signal" 2 2 2
chk_add_nr 1 1
chk_rm_nr 1 1
@@ -584,7 +644,7 @@ ip netns exec $ns1 ./pm_nl_ctl add 10.0.2.1 flags signal
ip netns exec $ns2 ./pm_nl_ctl limits 1 3
ip netns exec $ns2 ./pm_nl_ctl add 10.0.3.2 flags subflow
ip netns exec $ns2 ./pm_nl_ctl add 10.0.4.2 flags subflow
-run_tests $ns1 $ns2 10.0.1.1 1 2 slow
+run_tests $ns1 $ns2 10.0.1.1 0 1 2 slow
chk_join_nr "remove subflows and signal" 3 3 3
chk_add_nr 1 1
chk_rm_nr 2 2
--
2.29.2
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