selftests: mptcp: print extra msg in chk_csum_nr

When the multiple checksum errors occur in chk_csum_nr(), print the
numbers of the errors as an extra message.

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/net/mptcp/mptcp_join.sh b/tools/testing/selftests/net/mptcp/mptcp_join.sh
index 8023c07..e5c8fc2 100755 (executable)
--- a/tools/testing/selftests/net/mptcp/mptcp_join.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh
@@ -1013,6 +1013,7 @@ chk_csum_nr()
        local csum_ns2=${2:-0}
        local count
        local dump_stats
+       local extra_msg=""
        local allow_multi_errors_ns1=0
        local allow_multi_errors_ns2=0
 
@@ -1028,6 +1029,9 @@ chk_csum_nr()
        printf "%-${nr_blank}s %s" " " "sum"
        count=$(ip netns exec $ns1 nstat -as | grep MPTcpExtDataCsumErr | awk '{print $2}')
        [ -z "$count" ] && count=0
+       if [ "$count" != "$csum_ns1" ]; then
+               extra_msg="$extra_msg ns1=$count"
+       fi
        if { [ "$count" != $csum_ns1 ] && [ $allow_multi_errors_ns1 -eq 0 ]; } ||
           { [ "$count" -lt $csum_ns1 ] && [ $allow_multi_errors_ns1 -eq 1 ]; }; then
                echo "[fail] got $count data checksum error[s] expected $csum_ns1"
@@ -1039,15 +1043,20 @@ chk_csum_nr()
        echo -n " - csum  "
        count=$(ip netns exec $ns2 nstat -as | grep MPTcpExtDataCsumErr | awk '{print $2}')
        [ -z "$count" ] && count=0
+       if [ "$count" != "$csum_ns2" ]; then
+               extra_msg="$extra_msg ns2=$count"
+       fi
        if { [ "$count" != $csum_ns2 ] && [ $allow_multi_errors_ns2 -eq 0 ]; } ||
           { [ "$count" -lt $csum_ns2 ] && [ $allow_multi_errors_ns2 -eq 1 ]; }; then
                echo "[fail] got $count data checksum error[s] expected $csum_ns2"
                fail_test
                dump_stats=1
        else
-               echo "[ ok ]"
+               echo -n "[ ok ]"
        fi
        [ "${dump_stats}" = 1 ] && dump_stats
+
+       echo "$extra_msg"
 }
 
 chk_fail_nr()