selftests: mptcp: export TEST_COUNTER variable

Variable TEST_COUNT are used in mptcp_connect.sh and mptcp_join.sh as
test counters, which are initialized to 0, while variable test_cnt are used
in diag.sh and simult_flows.sh, which are initialized to 1. To maintain
consistency, this patch renames them all as MPTCP_LIB_TEST_COUNTER,
initializes it to 1, and exports it into mptcp_lib.sh.

Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://lore.kernel.org/r/20240308-upstream-net-next-20240308-selftests-mptcp-unification-v1-5-4f42c347b653@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Geliang Tang

tools/testing/selftests/net/mptcp/diag.sh

@@ -9,7 +9,6 @@
 . "$(dirname "${0}")/mptcp_lib.sh"
 
 ns=""
-test_cnt=1
 timeout_poll=30
 timeout_test=$((timeout_poll * 2 + 1))
 ret=0
@@ -69,7 +68,7 @@ __chk_nr()
 		echo "[  ok  ]"
 		mptcp_lib_result_pass "${msg}"
 	fi
-	test_cnt=$((test_cnt+1))
+	MPTCP_LIB_TEST_COUNTER=$((MPTCP_LIB_TEST_COUNTER+1))
 }
 
 __chk_msk_nr()
@@ -127,7 +126,7 @@ wait_msk_nr()
 		echo "[  ok  ]"
 		mptcp_lib_result_pass "${msg}"
 	fi
-	test_cnt=$((test_cnt+1))
+	MPTCP_LIB_TEST_COUNTER=$((MPTCP_LIB_TEST_COUNTER+1))
 }
 
 chk_msk_fallback_nr()

tools/testing/selftests/net/mptcp/mptcp_connect.sh

@@ -131,7 +131,6 @@ ns2=""
 ns3=""
 ns4=""
 
-TEST_COUNT=0
 TEST_GROUP=""
 
 # This function is used in the cleanup trap
@@ -321,7 +320,7 @@ do_transfer()
 	local extra_args="$7"
 
 	port=$((port + 1))
-	TEST_COUNT=$((TEST_COUNT+1))
+	MPTCP_LIB_TEST_COUNTER=$((MPTCP_LIB_TEST_COUNTER+1))
 
 	if [ "$rcvbuf" -gt 0 ]; then
 		extra_args="$extra_args -R $rcvbuf"

tools/testing/selftests/net/mptcp/mptcp_join.sh

@@ -48,7 +48,6 @@ declare -A all_tests
 declare -a only_tests_ids
 declare -a only_tests_names
 declare -A failed_tests
-TEST_COUNT=0
 TEST_NAME=""
 nr_blank=6
 
@@ -172,7 +171,7 @@ cleanup()
 
 print_title()
 {
-	printf "%03u %s\n" "${TEST_COUNT}" "${TEST_NAME}"
+	printf "%03u %s\n" "${MPTCP_LIB_TEST_COUNTER}" "${TEST_NAME}"
 }
 
 print_check()
@@ -233,7 +232,7 @@ skip_test()
 
 	local i
 	for i in "${only_tests_ids[@]}"; do
-		if [ "${TEST_COUNT}" -eq "${i}" ]; then
+		if [ "${MPTCP_LIB_TEST_COUNTER}" -eq "${i}" ]; then
 			return 1
 		fi
 	done
@@ -268,7 +267,7 @@ reset()
 
 	TEST_NAME="${1}"
 
-	TEST_COUNT=$((TEST_COUNT+1))
+	MPTCP_LIB_TEST_COUNTER=$((MPTCP_LIB_TEST_COUNTER+1))
 
 	if skip_test; then
 		last_test_ignored=1
@@ -462,7 +461,7 @@ fail_test()
 
 	# just in case a test is marked twice as failed
 	if [ ${last_test_failed} -eq 0 ]; then
-		failed_tests[${TEST_COUNT}]="${TEST_NAME}"
+		failed_tests[${MPTCP_LIB_TEST_COUNTER}]="${TEST_NAME}"
 		dump_stats
 		last_test_failed=1
 	fi
@@ -973,7 +972,7 @@ do_transfer()
 	local srv_proto="$4"
 	local connect_addr="$5"
 
-	local port=$((10000 + TEST_COUNT - 1))
+	local port=$((10000 + MPTCP_LIB_TEST_COUNTER - 1))
 	local cappid
 	local FAILING_LINKS=${FAILING_LINKS:-""}
 	local fastclose=${fastclose:-""}
@@ -991,9 +990,9 @@ do_transfer()
 			capuser="-Z $SUDO_USER"
 		fi
 
-		capfile=$(printf "mp_join-%02u-%s.pcap" "$TEST_COUNT" "${listener_ns}")
+		capfile=$(printf "mp_join-%02u-%s.pcap" "$MPTCP_LIB_TEST_COUNTER" "${listener_ns}")
 
-		echo "Capturing traffic for test $TEST_COUNT into $capfile"
+		echo "Capturing traffic for test $MPTCP_LIB_TEST_COUNTER into $capfile"
 		ip netns exec ${listener_ns} tcpdump -i any -s 65535 -B 32768 $capuser -w $capfile > "$capout" 2>&1 &
 		cappid=$!
 

tools/testing/selftests/net/mptcp/mptcp_lib.sh

@@ -10,6 +10,8 @@ readonly KSFT_TEST="${MPTCP_LIB_KSFT_TEST:-$(basename "${0}" .sh)}"
 
 MPTCP_LIB_SUBTESTS=()
 MPTCP_LIB_SUBTESTS_DUPLICATED=0
+# shellcheck disable=SC2034 # unused at this moment
+MPTCP_LIB_TEST_COUNTER=0
 
 # only if supported (or forced) and not disabled, see no-color.org
 if { [ -t 1 ] || [ "${SELFTESTS_MPTCP_LIB_COLOR_FORCE:-}" = "1" ]; } &&

tools/testing/selftests/net/mptcp/simult_flows.sh

@@ -14,7 +14,6 @@ ns3=""
 capture=false
 timeout_poll=30
 timeout_test=$((timeout_poll * 2 + 1))
-test_cnt=1
 ret=0
 bail=0
 slack=50
@@ -126,8 +125,8 @@ do_transfer()
 	local sin=$2
 	local max_time=$3
 	local port
-	port=$((10000+test_cnt))
-	test_cnt=$((test_cnt+1))
+	port=$((10000+MPTCP_LIB_TEST_COUNTER))
+	MPTCP_LIB_TEST_COUNTER=$((MPTCP_LIB_TEST_COUNTER+1))
 
 	:> "$cout"
 	:> "$sout"