selftests: mptcp: print test results with counters

This patch adds a new helper mptcp_lib_print_title(), a wrapper of
mptcp_lib_inc_test_counter() and mptcp_lib_pr_title_counter(), to
print out test counter in each test result and increase the counter.
Use this helper to print out test counters for every tests in diag.sh,
mptcp_connect.sh, mptcp_sockopt.sh, pm_netlink.sh, simult_flows.sh,
and userspace_pm.sh.

diag.sh:

01 no msk on netns creation                          [  ok  ]
02 listen match for dport 10000                      [  ok  ]
03 listen match for sport 10000                      [  ok  ]
04 listen match for saddr and sport                  [  ok  ]
05 all listen sockets                                [  ok  ]

mptcp_connect.sh:

01 New MPTCP socket can be blocked via sysctl                       [ OK ]
02 Validating network environment with pings                        [ OK ]
INFO: Using loss of 0.85% delay 31 ms reorder .. with delay 7ms on ns3eth4
03 ns1 MPTCP -> ns1 (10.0.1.1:10000  ) MPTCP     (duration    69ms) [ OK ]
04 ns1 MPTCP -> ns1 (10.0.1.1:10001  ) TCP       (duration    20ms) [ OK ]
05 ns1 TCP   -> ns1 (10.0.1.1:10002  ) MPTCP     (duration    16ms) [ OK ]

mptcp_sockopt.sh:

01 Transfer v4                                       [ OK ]
02 Mark v4                                           [ OK ]
03 Transfer v6                                       [ OK ]
04 Mark v6                                           [ OK ]
05 SOL_MPTCP sockopt v4                              [ OK ]

pm_netlink.sh:

01 defaults addr list                                [ OK ]
02 simple add/get addr                               [ OK ]
03 dump addrs                                        [ OK ]
04 simple del addr                                   [ OK ]
05 dump addrs after del                              [ OK ]

simult_flows.sh:

01 balanced bwidth                                     7391 max 8456 [ OK ]
02 balanced bwidth - reverse direction                 7403 max 8456 [ OK ]
03 balanced bwidth with unbalanced delay               7429 max 8456 [ OK ]
04 balanced bwidth with unbalanced delay - reverse ... 7485 max 8456 [ OK ]
05 unbalanced bwidth                                   7549 max 8456 [ OK ]

userspace_pm.sh:

01 Created network namespaces ns1, ns2                               [ OK ]
INFO: Make connections
02 Established IPv4 MPTCP Connection ns2 => ns1                      [ OK ]
03 Established IPv6 MPTCP Connection ns2 => ns1                      [ OK ]
INFO: Announce tests
04 ADD_ADDR 10.0.2.2 (ns2) => ns1, invalid token                     [ OK ]
05 ADD_ADDR id:67 10.0.2.2 (ns2) => ns1, reuse port                  [ OK ]

Having test counters helps to quickly identify issues when looking at a
long list of output logs and results.
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-v1-7-4f42c347b653@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

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

@@ -54,7 +54,7 @@ __chk_nr()
 
 	nr=$(eval $command)
 
-	printf "%-50s" "$msg"
+	mptcp_lib_print_title "$msg"
 	if [ "$nr" != "$expected" ]; then
 		if [ "$nr" = "$skip" ] && ! mptcp_lib_expect_all_features; then
 			echo "[ skip ] Feature probably not supported"
@@ -68,7 +68,6 @@ __chk_nr()
 		echo "[  ok  ]"
 		mptcp_lib_result_pass "${msg}"
 	fi
-	MPTCP_LIB_TEST_COUNTER=$((MPTCP_LIB_TEST_COUNTER+1))
 }
 
 __chk_msk_nr()
@@ -113,7 +112,7 @@ wait_msk_nr()
 		sleep 1
 	done
 
-	printf "%-50s" "$msg"
+	mptcp_lib_print_title "$msg"
 	if [ $i -ge $timeout ]; then
 		echo "[ fail ] timeout while expecting $expected max $max last $nr"
 		mptcp_lib_result_fail "${msg} # timeout"
@@ -126,7 +125,6 @@ wait_msk_nr()
 		echo "[  ok  ]"
 		mptcp_lib_result_pass "${msg}"
 	fi
-	MPTCP_LIB_TEST_COUNTER=$((MPTCP_LIB_TEST_COUNTER+1))
 }
 
 chk_msk_fallback_nr()

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

@@ -249,7 +249,8 @@ fi
 
 print_larger_title() {
 	# here we don't have the time, a bit longer for the alignment
-	printf "%-69s" "${@}"
+	MPTCP_LIB_TEST_FORMAT="%02u %-69s" \
+		mptcp_lib_print_title "${@}"
 }
 
 check_mptcp_disabled()
@@ -320,7 +321,6 @@ do_transfer()
 	local extra_args="$7"
 
 	port=$((port + 1))
-	MPTCP_LIB_TEST_COUNTER=$((MPTCP_LIB_TEST_COUNTER+1))
 
 	if [ "$rcvbuf" -gt 0 ]; then
 		extra_args="$extra_args -R $rcvbuf"
@@ -347,7 +347,7 @@ do_transfer()
 	addr_port=$(printf "%s:%d" ${connect_addr} ${port})
 	local result_msg
 	result_msg="$(printf "%.3s %-5s -> %.3s (%-20s) %-5s" ${connector_ns} ${cl_proto} ${listener_ns} ${addr_port} ${srv_proto})"
-	printf "%-50s" "${result_msg}"
+	mptcp_lib_print_title "${result_msg}"
 
 	if $capture; then
 		local capuser

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

@@ -115,7 +115,7 @@ check_mark()
 
 print_title()
 {
-	printf "%-50s" "${@}"
+	mptcp_lib_print_title "${@}"
 }
 
 do_transfer()

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

@@ -53,7 +53,7 @@ check()
 	local msg="$3"
 	local rc=0
 
-	printf "%-50s" "$msg"
+	mptcp_lib_print_title "$msg"
 	mptcp_lib_check_output "${err}" "${cmd}" "${expected}" || rc=${?}
 	if [ ${rc} -eq 2 ]; then
 		mptcp_lib_result_fail "${msg} # error ${rc}"
@@ -189,7 +189,8 @@ subflow,backup,fullmesh 10.0.1.1" "          (backup,fullmesh)"
 else
 	for st in fullmesh nofullmesh backup,fullmesh; do
 		st="          (${st})"
-		printf "%-50s%s\n" "${st}" "[SKIP]"
+		mptcp_lib_print_title "${st}"
+		echo "[SKIP]"
 		mptcp_lib_result_skip "${st}"
 	done
 fi

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

@@ -14,6 +14,8 @@ ns3=""
 capture=false
 timeout_poll=30
 timeout_test=$((timeout_poll * 2 + 1))
+# a bit more space: because we have more to display
+MPTCP_LIB_TEST_FORMAT="%02u %-60s"
 ret=0
 bail=0
 slack=50
@@ -126,7 +128,6 @@ do_transfer()
 	local max_time=$3
 	local port
 	port=$((10000+MPTCP_LIB_TEST_COUNTER))
-	MPTCP_LIB_TEST_COUNTER=$((MPTCP_LIB_TEST_COUNTER+1))
 
 	:> "$cout"
 	:> "$sout"
@@ -238,7 +239,7 @@ run_test()
 	# completion (see mptcp_connect): 200ms on each side, add some slack
 	time=$((time + 400 + slack))
 
-	printf "%-60s" "$msg"
+	mptcp_lib_print_title "$msg"
 	do_transfer $small $large $time
 	lret=$?
 	mptcp_lib_result_code "${lret}" "${msg}"
@@ -248,7 +249,7 @@ run_test()
 	fi
 
 	msg+=" - reverse direction"
-	printf "%-60s" "${msg}"
+	mptcp_lib_print_title "${msg}"
 	do_transfer $large $small $time
 	lret=$?
 	mptcp_lib_result_code "${lret}" "${msg}"

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

@@ -54,6 +54,8 @@ ns1=""
 ns2=""
 ret=0
 test_name=""
+# a bit more space: because we have more to display
+MPTCP_LIB_TEST_FORMAT="%02u %-68s"
 
 _printf() {
 	stdbuf -o0 -e0 printf "${@}"
@@ -69,7 +71,7 @@ print_test()
 {
 	test_name="${1}"
 
-	_printf "%-68s" "${test_name}"
+	mptcp_lib_print_title "${test_name}"
 }
 
 print_results()