selftests: mptcp: declare var as local

Just to avoid classical Bash pitfall where variables are accidentally
overridden by other functions because the proper scope has not been
defined.

That's also what is done in other MPTCP selftests scripts where all non
local variables are defined at the beginning of the script and the
others are defined with the "local" keyword.

Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/tools/testing/selftests/net/mptcp/mptcp_sockopt.sh b/tools/testing/selftests/net/mptcp/mptcp_sockopt.sh
index f74b237..1b70c0a 100755 (executable)
--- a/tools/testing/selftests/net/mptcp/mptcp_sockopt.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_sockopt.sh
@@ -22,6 +22,7 @@ add_mark_rules()
        local ns=$1
        local m=$2
 
+       local t
        for t in iptables ip6tables; do
                # just to debug: check we have multiple subflows connection requests
                ip netns exec $ns $t -A OUTPUT -p tcp --syn -m mark --mark $m -j ACCEPT
@@ -36,6 +37,7 @@ add_mark_rules()
 
 init()
 {
+       local netns
        for netns in "$ns1" "$ns2" "$ns_sbox";do
                ip netns add $netns || exit $ksft_skip
                ip -net $netns link set lo up
@@ -44,6 +46,7 @@ init()
                ip netns exec $netns sysctl -q net.ipv4.conf.default.rp_filter=0
        done
 
+       local i
        for i in `seq 1 4`; do
                ip link add ns1eth$i netns "$ns1" type veth peer name ns2eth$i netns "$ns2"
                ip -net "$ns1" addr add 10.0.$i.1/24 dev ns1eth$i
@@ -73,6 +76,7 @@ init()
 
 cleanup()
 {
+       local netns
        for netns in "$ns1" "$ns2" "$ns_sbox"; do
                ip netns del $netns
        done
@@ -103,15 +107,17 @@ check_mark()
        local ns=$1
        local af=$2
 
-       tables=iptables
+       local tables=iptables
 
        if [ $af -eq 6 ];then
                tables=ip6tables
        fi
 
+       local counters values
        counters=$(ip netns exec $ns $tables -v -L OUTPUT | grep DROP)
        values=${counters%DROP*}
 
+       local v
        for v in $values; do
                if [ $v -ne 0 ]; then
                        echo "FAIL: got $tables $values in ns $ns , not 0 - not all expected packets marked" 1>&2
@@ -131,9 +137,9 @@ print_file_err()
 
 check_transfer()
 {
-       in=$1
-       out=$2
-       what=$3
+       local in=$1
+       local out=$2
+       local what=$3
 
        cmp "$in" "$out" > /dev/null 2>&1
        if [ $? -ne 0 ] ;then
@@ -156,18 +162,18 @@ is_v6()
 
 do_transfer()
 {
-       listener_ns="$1"
-       connector_ns="$2"
-       cl_proto="$3"
-       srv_proto="$4"
-       connect_addr="$5"
+       local listener_ns="$1"
+       local connector_ns="$2"
+       local cl_proto="$3"
+       local srv_proto="$4"
+       local connect_addr="$5"
 
-       port=12001
+       local port=12001
 
        :> "$cout"
        :> "$sout"
 
-       mptcp_connect="./mptcp_connect -r 20"
+       local mptcp_connect="./mptcp_connect -r 20"
 
        local local_addr
        if is_v6 "${connect_addr}"; then
@@ -180,7 +186,7 @@ do_transfer()
                ip netns exec ${listener_ns} \
                        $mptcp_connect -t ${timeout_poll} -l -M 1 -p $port -s ${srv_proto} -c TIMESTAMPNS,TCPINQ \
                                ${local_addr} < "$sin" > "$sout" &
-       spid=$!
+       local spid=$!
 
        sleep 1
 
@@ -189,12 +195,12 @@ do_transfer()
                        $mptcp_connect -t ${timeout_poll} -M 2 -p $port -s ${cl_proto} -c TIMESTAMPNS,TCPINQ \
                                $connect_addr < "$cin" > "$cout" &
 
-       cpid=$!
+       local cpid=$!
 
        wait $cpid
-       retc=$?
+       local retc=$?
        wait $spid
-       rets=$?
+       local rets=$?
 
        if [ ${rets} -ne 0 ] || [ ${retc} -ne 0 ]; then
                echo " client exit code $retc, server $rets" 1>&2
@@ -229,9 +235,9 @@ do_transfer()
 
 make_file()
 {
-       name=$1
-       who=$2
-       size=$3
+       local name=$1
+       local who=$2
+       local size=$3
 
        dd if=/dev/urandom of="$name" bs=1024 count=$size 2> /dev/null
        echo -e "\nMPTCP_TEST_FILE_END_MARKER" >> "$name"
@@ -264,9 +270,9 @@ do_mptcp_sockopt_tests()
 
 run_tests()
 {
-       listener_ns="$1"
-       connector_ns="$2"
-       connect_addr="$3"
+       local listener_ns="$1"
+       local connector_ns="$2"
+       local connect_addr="$3"
        local lret=0
 
        do_transfer ${listener_ns} ${connector_ns} MPTCP MPTCP ${connect_addr}
@@ -282,7 +288,7 @@ run_tests()
 do_tcpinq_test()
 {
        ip netns exec "$ns_sbox" ./mptcp_inq "$@"
-       lret=$?
+       local lret=$?
        if [ $lret -ne 0 ];then
                ret=$lret
                echo "FAIL: mptcp_inq $@" 1>&2
@@ -297,6 +303,7 @@ do_tcpinq_tests()
 {
        local lret=0
 
+       local args
        for args in "-t tcp" "-r tcp"; do
                do_tcpinq_test $args
                lret=$?