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selftests: mptcp: more robust signal race test

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The in kernel MPTCP PM implementation can process a single
incoming add address option at any given time. In the
mentioned test the server can surpass such limit. Let the
setup cope with that allowing a faster add_addr retransmission.

Fixes: a88c9e4969 ("mptcp: do not block subflows creation on errors")
Fixes: f7efc7771e ("mptcp: drop argument port from mptcp_pm_announce_addr")
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/254
Reported-and-tested-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
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 2022-02-18 13:35:43 -08:00 committed by David S. Miller
parent f73c119463
commit 6ef84b1517
1 changed files with 12 additions and 3 deletions
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15
tools/testing/selftests/net/mptcp/mptcp_join.sh
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@ -752,11 +752,17 @@ chk_add_nr()
local mis_ack_nr=${8:-0}
local count
local dump_stats
local timeout
timeout=`ip netns exec $ns1 sysctl -n net.mptcp.add_addr_timeout`
printf "%-39s %s" " " "add"
count=`ip netns exec $ns2 nstat -as | grep MPTcpExtAddAddr | awk '{print $2}'`
count=`ip netns exec $ns2 nstat -as MPTcpExtAddAddr | grep MPTcpExtAddAddr | awk '{print $2}'`
[ -z "$count" ] && count=0
if [ "$count" != "$add_nr" ]; then
# if the test configured a short timeout tolerate greater then expected
# add addrs options, due to retransmissions
if [ "$count" != "$add_nr" ] && [ "$timeout" -gt 1 -o "$count" -lt "$add_nr" ]; then
echo "[fail] got $count ADD_ADDR[s] expected $add_nr"
ret=1
dump_stats=1
@ -1158,7 +1164,10 @@ signal_address_tests()
ip netns exec $ns2 ./pm_nl_ctl add 10.0.2.2 flags signal
ip netns exec $ns2 ./pm_nl_ctl add 10.0.3.2 flags signal
ip netns exec $ns2 ./pm_nl_ctl add 10.0.4.2 flags signal
run_tests $ns1 $ns2 10.0.1.1
# the peer could possibly miss some addr notification, allow retransmission
ip netns exec $ns1 sysctl -q net.mptcp.add_addr_timeout=1
run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow
chk_join_nr "signal addresses race test" 3 3 3
# the server will not signal the address terminating