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selftests: mptcp: add testcase for active-back
Add more test-case for link failures scenario, including recovery from link failure using only backup subflows and bi-directional transfer. Additionally explicitly check for stale count Co-developed-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni
David S. Miller
parent
0460ce229f
commit
7d1e6f1639
@ -3,8 +3,10 @@
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ret=0
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sin=""
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sinfail=""
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sout=""
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cin=""
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cinfail=""
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cinsent=""
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cout=""
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ksft_skip=4
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@ -76,6 +78,14 @@ init()
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done
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}
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init_shapers()
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{
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for i in `seq 1 4`; do
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tc -n $ns1 qdisc add dev ns1eth$i root netem rate 20mbit delay 1
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tc -n $ns2 qdisc add dev ns2eth$i root netem rate 20mbit delay 1
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done
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}
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cleanup_partial()
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{
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rm -f "$capout"
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@ -88,8 +98,8 @@ cleanup_partial()
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cleanup()
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{
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rm -f "$cin" "$cout"
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rm -f "$sin" "$sout" "$cinsent"
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rm -f "$cin" "$cout" "$sinfail"
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rm -f "$sin" "$sout" "$cinsent" "$cinfail"
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cleanup_partial
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}
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@ -211,11 +221,15 @@ link_failure()
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{
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ns="$1"
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l=$((RANDOM%4))
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l=$((l+1))
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if [ -z "$FAILING_LINKS" ]; then
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l=$((RANDOM%4))
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FAILING_LINKS=$((l+1))
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fi
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veth="ns1eth$l"
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ip -net "$ns" link set "$veth" down
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for l in $FAILING_LINKS; do
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veth="ns1eth$l"
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ip -net "$ns" link set "$veth" down
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done
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}
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# $1: IP address
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@ -280,10 +294,17 @@ do_transfer()
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local_addr="0.0.0.0"
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fi
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timeout ${timeout_test} \
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ip netns exec ${listener_ns} \
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$mptcp_connect -t ${timeout_poll} -l -p $port -s ${srv_proto} \
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${local_addr} < "$sin" > "$sout" &
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if [ "$test_link_fail" -eq 2 ];then
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timeout ${timeout_test} \
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ip netns exec ${listener_ns} \
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$mptcp_connect -t ${timeout_poll} -l -p $port -s ${cl_proto} \
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${local_addr} < "$sinfail" > "$sout" &
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else
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timeout ${timeout_test} \
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ip netns exec ${listener_ns} \
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$mptcp_connect -t ${timeout_poll} -l -p $port -s ${srv_proto} \
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${local_addr} < "$sin" > "$sout" &
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fi
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spid=$!
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sleep 1
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@ -294,7 +315,7 @@ do_transfer()
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$mptcp_connect -t ${timeout_poll} -p $port -s ${cl_proto} \
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$connect_addr < "$cin" > "$cout" &
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else
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( cat "$cin" ; sleep 2; link_failure $listener_ns ; cat "$cin" ) | \
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( cat "$cinfail" ; sleep 2; link_failure $listener_ns ; cat "$cinfail" ) | \
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tee "$cinsent" | \
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timeout ${timeout_test} \
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ip netns exec ${connector_ns} \
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@ -434,7 +455,11 @@ do_transfer()
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return 1
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fi
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check_transfer $sin $cout "file received by client"
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if [ "$test_link_fail" -eq 2 ];then
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check_transfer $sinfail $cout "file received by client"
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else
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check_transfer $sin $cout "file received by client"
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fi
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retc=$?
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if [ "$test_link_fail" -eq 0 ];then
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check_transfer $cin $sout "file received by server"
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@ -477,29 +502,33 @@ run_tests()
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lret=0
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oldin=""
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if [ "$test_linkfail" -eq 1 ];then
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size=$((RANDOM%1024))
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# create the input file for the failure test when
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# the first failure test run
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if [ "$test_linkfail" -ne 0 -a -z "$cinfail" ]; then
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# the client file must be considerably larger
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# of the maximum expected cwin value, or the
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# link utilization will be not predicable
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size=$((RANDOM%2))
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size=$((size+1))
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size=$((size*128))
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size=$((size*8192))
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size=$((size + ( $RANDOM % 8192) ))
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oldin=$(mktemp)
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cp "$cin" "$oldin"
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make_file "$cin" "client" $size
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cinfail=$(mktemp)
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make_file "$cinfail" "client" $size
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fi
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if [ "$test_linkfail" -eq 2 -a -z "$sinfail" ]; then
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size=$((RANDOM%16))
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size=$((size+1))
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size=$((size*2048))
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sinfail=$(mktemp)
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make_file "$sinfail" "server" $size
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fi
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do_transfer ${listener_ns} ${connector_ns} MPTCP MPTCP ${connect_addr} \
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${test_linkfail} ${addr_nr_ns1} ${addr_nr_ns2} ${speed} ${bkup}
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lret=$?
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if [ "$test_linkfail" -eq 1 ];then
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cp "$oldin" "$cin"
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rm -f "$oldin"
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fi
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if [ $lret -ne 0 ]; then
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ret=$lret
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return
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fi
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}
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chk_csum_nr()
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@ -593,6 +622,46 @@ chk_join_nr()
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fi
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}
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# a negative value for 'stale_max' means no upper bound:
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# for bidirectional transfer, if one peer sleep for a while
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# - as these tests do - we can have a quite high number of
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# stale/recover conversions, proportional to
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# sleep duration/ MPTCP-level RTX interval.
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chk_stale_nr()
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{
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local ns=$1
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local stale_min=$2
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local stale_max=$3
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local stale_delta=$4
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local dump_stats
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local stale_nr
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local recover_nr
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printf "%-39s %-18s" " " "stale"
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stale_nr=`ip netns exec $ns nstat -as | grep MPTcpExtSubflowStale | awk '{print $2}'`
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[ -z "$stale_nr" ] && stale_nr=0
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recover_nr=`ip netns exec $ns nstat -as | grep MPTcpExtSubflowRecover | awk '{print $2}'`
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[ -z "$recover_nr" ] && recover_nr=0
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if [ $stale_nr -lt $stale_min ] ||
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[ $stale_max -gt 0 -a $stale_nr -gt $stale_max ] ||
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[ $((stale_nr - $recover_nr)) -ne $stale_delta ]; then
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echo "[fail] got $stale_nr stale[s] $recover_nr recover[s], " \
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" expected stale in range [$stale_min..$stale_max]," \
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" stale-recover delta $stale_delta "
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ret=1
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dump_stats=1
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else
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echo "[ ok ]"
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fi
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if [ "${dump_stats}" = 1 ]; then
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echo $ns stats
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ip netns exec $ns ip -s link show
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ip netns exec $ns nstat -as | grep MPTcp
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fi
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}
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chk_add_nr()
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{
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local add_nr=$1
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@ -801,6 +870,27 @@ chk_prio_nr()
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fi
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}
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chk_link_usage()
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{
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local ns=$1
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local link=$2
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local out=$3
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local expected_rate=$4
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local tx_link=`ip netns exec $ns cat /sys/class/net/$link/statistics/tx_bytes`
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local tx_total=`ls -l $out | awk '{print $5}'`
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local tx_rate=$((tx_link * 100 / $tx_total))
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local tolerance=5
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printf "%-39s %-18s" " " "link usage"
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if [ $tx_rate -lt $((expected_rate - $tolerance)) -o \
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$tx_rate -gt $((expected_rate + $tolerance)) ]; then
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echo "[fail] got $tx_rate% usage, expected $expected_rate%"
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ret=1
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else
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echo "[ ok ]"
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fi
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}
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subflows_tests()
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{
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reset
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@ -924,14 +1014,80 @@ link_failure_tests()
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{
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# accept and use add_addr with additional subflows and link loss
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reset
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# without any b/w limit each veth could spool the packets and get
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# them acked at xmit time, so that the corresponding subflow will
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# have almost always no outstanding pkts, the scheduler will pick
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# always the first subflow and we will have hard time testing
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# active backup and link switch-over.
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# Let's set some arbitrary (low) virtual link limits.
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init_shapers
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ip netns exec $ns1 ./pm_nl_ctl limits 0 3
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ip netns exec $ns1 ./pm_nl_ctl add 10.0.2.1 flags signal
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ip netns exec $ns1 ./pm_nl_ctl add 10.0.2.1 dev ns1eth2 flags signal
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ip netns exec $ns2 ./pm_nl_ctl limits 1 3
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ip netns exec $ns2 ./pm_nl_ctl add 10.0.3.2 flags subflow
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ip netns exec $ns2 ./pm_nl_ctl add 10.0.4.2 flags subflow
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ip netns exec $ns2 ./pm_nl_ctl add 10.0.3.2 dev ns2eth3 flags subflow
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ip netns exec $ns2 ./pm_nl_ctl add 10.0.4.2 dev ns2eth4 flags subflow
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run_tests $ns1 $ns2 10.0.1.1 1
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chk_join_nr "multiple flows, signal, link failure" 3 3 3
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chk_add_nr 1 1
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chk_stale_nr $ns2 1 5 1
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# accept and use add_addr with additional subflows and link loss
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# for bidirectional transfer
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reset
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init_shapers
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ip netns exec $ns1 ./pm_nl_ctl limits 0 3
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ip netns exec $ns1 ./pm_nl_ctl add 10.0.2.1 dev ns1eth2 flags signal
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ip netns exec $ns2 ./pm_nl_ctl limits 1 3
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ip netns exec $ns2 ./pm_nl_ctl add 10.0.3.2 dev ns2eth3 flags subflow
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ip netns exec $ns2 ./pm_nl_ctl add 10.0.4.2 dev ns2eth4 flags subflow
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run_tests $ns1 $ns2 10.0.1.1 2
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chk_join_nr "multi flows, signal, bidi, link fail" 3 3 3
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chk_add_nr 1 1
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chk_stale_nr $ns2 1 -1 1
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# 2 subflows plus 1 backup subflow with a lossy link, backup
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# will never be used
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reset
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init_shapers
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ip netns exec $ns1 ./pm_nl_ctl limits 0 2
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ip netns exec $ns1 ./pm_nl_ctl add 10.0.2.1 dev ns1eth2 flags signal
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ip netns exec $ns2 ./pm_nl_ctl limits 1 2
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export FAILING_LINKS="1"
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ip netns exec $ns2 ./pm_nl_ctl add 10.0.3.2 dev ns2eth3 flags subflow,backup
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run_tests $ns1 $ns2 10.0.1.1 1
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chk_join_nr "backup subflow unused, link failure" 2 2 2
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chk_add_nr 1 1
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chk_link_usage $ns2 ns2eth3 $cinsent 0
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# 2 lossy links after half transfer, backup will get half of
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# the traffic
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reset
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init_shapers
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ip netns exec $ns1 ./pm_nl_ctl limits 0 2
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ip netns exec $ns1 ./pm_nl_ctl add 10.0.2.1 dev ns1eth2 flags signal
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ip netns exec $ns2 ./pm_nl_ctl limits 1 2
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ip netns exec $ns2 ./pm_nl_ctl add 10.0.3.2 dev ns2eth3 flags subflow,backup
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export FAILING_LINKS="1 2"
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run_tests $ns1 $ns2 10.0.1.1 1
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chk_join_nr "backup flow used, multi links fail" 2 2 2
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chk_add_nr 1 1
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chk_stale_nr $ns2 2 4 2
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chk_link_usage $ns2 ns2eth3 $cinsent 50
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# use a backup subflow with the first subflow on a lossy link
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# for bidirectional transfer
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reset
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init_shapers
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ip netns exec $ns1 ./pm_nl_ctl limits 0 2
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ip netns exec $ns1 ./pm_nl_ctl add 10.0.2.1 dev ns1eth2 flags signal
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ip netns exec $ns2 ./pm_nl_ctl limits 1 3
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ip netns exec $ns2 ./pm_nl_ctl add 10.0.3.2 dev ns2eth3 flags subflow,backup
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run_tests $ns1 $ns2 10.0.1.1 2
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chk_join_nr "backup flow used, bidi, link failure" 2 2 2
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chk_add_nr 1 1
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chk_stale_nr $ns2 1 -1 2
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chk_link_usage $ns2 ns2eth3 $cinsent 50
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}
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add_addr_timeout_tests()
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