[PATCH net-next 09/13] selftests: mptcp: connect: fix shellcheck warnings
From: Matthieu Baerts (NGI0)
Date: Tue Mar 05 2024 - 05:52:08 EST
shellcheck recently helped to prevent issues. It is then good to fix the
other harmless issues in order to spot "real" ones later.
Here, two categories of warnings are now ignored:
- SC2317: Command appears to be unreachable. The cleanup() function is
invoked indirectly via the EXIT trap.
- SC2086: Double quote to prevent globbing and word splitting. This is
recommended, but the current usage is correct and there is no need to
do all these modifications to be compliant with this rule.
For the modifications:
- SC2034: ksft_skip appears unused.
- SC2181: Check exit code directly with e.g. 'if mycmd;', not
indirectly with $?.
- SC2004: $/${} is unnecessary on arithmetic variables.
- SC2155: Declare and assign separately to avoid masking return
values.
- SC2166: Prefer [ p ] && [ q ] as [ p -a q ] is not well defined.
- SC2059: Don't use variables in the printf format string. Use printf
'..%s..' "$foo".
Now this script is shellcheck (0.9.0) compliant. We can easily spot new
issues.
Reviewed-by: Mat Martineau <martineau@xxxxxxxxxx>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@xxxxxxxxxx>
---
tools/testing/selftests/net/mptcp/mptcp_connect.sh | 76 +++++++++++++---------
1 file changed, 47 insertions(+), 29 deletions(-)
diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.sh b/tools/testing/selftests/net/mptcp/mptcp_connect.sh
index b53ae64ec08c..0ca2960c9099 100755
--- a/tools/testing/selftests/net/mptcp/mptcp_connect.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_connect.sh
@@ -1,6 +1,11 @@
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
+# Double quotes to prevent globbing and word splitting is recommended in new
+# code but we accept it, especially because there were too many before having
+# address all other issues detected by shellcheck.
+#shellcheck disable=SC2086
+
. "$(dirname "${0}")/mptcp_lib.sh"
time_start=$(date +%s)
@@ -13,7 +18,6 @@ sout=""
cin_disconnect=""
cin=""
cout=""
-ksft_skip=4
capture=false
timeout_poll=30
timeout_test=$((timeout_poll * 2 + 1))
@@ -129,6 +133,8 @@ ns4=""
TEST_COUNT=0
TEST_GROUP=""
+# This function is used in the cleanup trap
+#shellcheck disable=SC2317
cleanup()
{
rm -f "$cin_disconnect" "$cout_disconnect"
@@ -211,8 +217,9 @@ set_ethtool_flags() {
local dev="$2"
local flags="$3"
- ip netns exec $ns ethtool -K $dev $flags 2>/dev/null
- [ $? -eq 0 ] && echo "INFO: set $ns dev $dev: ethtool -K $flags"
+ if ip netns exec $ns ethtool -K $dev $flags 2>/dev/null; then
+ echo "INFO: set $ns dev $dev: ethtool -K $flags"
+ fi
}
set_random_ethtool_flags() {
@@ -307,7 +314,7 @@ do_transfer()
local extra_args="$7"
local port
- port=$((10000+$TEST_COUNT))
+ port=$((10000+TEST_COUNT))
TEST_COUNT=$((TEST_COUNT+1))
if [ "$rcvbuf" -gt 0 ]; then
@@ -365,12 +372,18 @@ do_transfer()
nstat -n
fi
- local stat_synrx_last_l=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtMPCapableSYNRX")
- local stat_ackrx_last_l=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtMPCapableACKRX")
- local stat_cookietx_last=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtSyncookiesSent")
- local stat_cookierx_last=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtSyncookiesRecv")
- local stat_csum_err_s=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtDataCsumErr")
- local stat_csum_err_c=$(mptcp_lib_get_counter "${connector_ns}" "MPTcpExtDataCsumErr")
+ local stat_synrx_last_l
+ local stat_ackrx_last_l
+ local stat_cookietx_last
+ local stat_cookierx_last
+ local stat_csum_err_s
+ local stat_csum_err_c
+ stat_synrx_last_l=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtMPCapableSYNRX")
+ stat_ackrx_last_l=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtMPCapableACKRX")
+ stat_cookietx_last=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtSyncookiesSent")
+ stat_cookierx_last=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtSyncookiesRecv")
+ stat_csum_err_s=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtDataCsumErr")
+ stat_csum_err_c=$(mptcp_lib_get_counter "${connector_ns}" "MPTcpExtDataCsumErr")
timeout ${timeout_test} \
ip netns exec ${listener_ns} \
@@ -433,11 +446,16 @@ do_transfer()
mptcp_lib_check_transfer $cin $sout "file received by server"
rets=$?
- local stat_synrx_now_l=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtMPCapableSYNRX")
- local stat_ackrx_now_l=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtMPCapableACKRX")
- local stat_cookietx_now=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtSyncookiesSent")
- local stat_cookierx_now=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtSyncookiesRecv")
- local stat_ooo_now=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtTCPOFOQueue")
+ local stat_synrx_now_l
+ local stat_ackrx_now_l
+ local stat_cookietx_now
+ local stat_cookierx_now
+ local stat_ooo_now
+ stat_synrx_now_l=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtMPCapableSYNRX")
+ stat_ackrx_now_l=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtMPCapableACKRX")
+ stat_cookietx_now=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtSyncookiesSent")
+ stat_cookierx_now=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtSyncookiesRecv")
+ stat_ooo_now=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtTCPOFOQueue")
expect_synrx=$((stat_synrx_last_l))
expect_ackrx=$((stat_ackrx_last_l))
@@ -446,8 +464,8 @@ do_transfer()
cookies=${cookies##*=}
if [ ${cl_proto} = "MPTCP" ] && [ ${srv_proto} = "MPTCP" ]; then
- expect_synrx=$((stat_synrx_last_l+$connect_per_transfer))
- expect_ackrx=$((stat_ackrx_last_l+$connect_per_transfer))
+ expect_synrx=$((stat_synrx_last_l+connect_per_transfer))
+ expect_ackrx=$((stat_ackrx_last_l+connect_per_transfer))
fi
if [ ${stat_synrx_now_l} -lt ${expect_synrx} ]; then
@@ -455,7 +473,7 @@ do_transfer()
"${stat_synrx_now_l}" "${expect_synrx}" 1>&2
retc=1
fi
- if [ ${stat_ackrx_now_l} -lt ${expect_ackrx} -a ${stat_ooo_now} -eq 0 ]; then
+ if [ ${stat_ackrx_now_l} -lt ${expect_ackrx} ] && [ ${stat_ooo_now} -eq 0 ]; then
if [ ${stat_ooo_now} -eq 0 ]; then
printf "[ FAIL ] lower MPC ACK rx (%d) than expected (%d)\n" \
"${stat_ackrx_now_l}" "${expect_ackrx}" 1>&2
@@ -466,18 +484,20 @@ do_transfer()
fi
if $checksum; then
- local csum_err_s=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtDataCsumErr")
- local csum_err_c=$(mptcp_lib_get_counter "${connector_ns}" "MPTcpExtDataCsumErr")
+ local csum_err_s
+ local csum_err_c
+ csum_err_s=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtDataCsumErr")
+ csum_err_c=$(mptcp_lib_get_counter "${connector_ns}" "MPTcpExtDataCsumErr")
local csum_err_s_nr=$((csum_err_s - stat_csum_err_s))
if [ $csum_err_s_nr -gt 0 ]; then
- printf "[ FAIL ]\nserver got $csum_err_s_nr data checksum error[s]"
+ printf "[ FAIL ]\nserver got %d data checksum error[s]" ${csum_err_s_nr}
rets=1
fi
local csum_err_c_nr=$((csum_err_c - stat_csum_err_c))
if [ $csum_err_c_nr -gt 0 ]; then
- printf "[ FAIL ]\nclient got $csum_err_c_nr data checksum error[s]"
+ printf "[ FAIL ]\nclient got %d data checksum error[s]" ${csum_err_c_nr}
retc=1
fi
fi
@@ -645,7 +665,7 @@ run_test_transparent()
return
fi
-ip netns exec "$listener_ns" nft -f /dev/stdin <<"EOF"
+ if ! ip netns exec "$listener_ns" nft -f /dev/stdin <<"EOF"
flush ruleset
table inet mangle {
chain divert {
@@ -656,7 +676,7 @@ table inet mangle {
}
}
EOF
- if [ $? -ne 0 ]; then
+ then
echo "SKIP: $msg, could not load nft ruleset"
mptcp_lib_fail_if_expected_feature "nft rules"
mptcp_lib_result_skip "${TEST_GROUP}"
@@ -671,8 +691,7 @@ EOF
local_addr="0.0.0.0"
fi
- ip -net "$listener_ns" $r6flag rule add fwmark 1 lookup 100
- if [ $? -ne 0 ]; then
+ if ! ip -net "$listener_ns" $r6flag rule add fwmark 1 lookup 100; then
ip netns exec "$listener_ns" nft flush ruleset
echo "SKIP: $msg, ip $r6flag rule failed"
mptcp_lib_fail_if_expected_feature "ip rule"
@@ -680,8 +699,7 @@ EOF
return
fi
- ip -net "$listener_ns" route add local $local_addr/0 dev lo table 100
- if [ $? -ne 0 ]; then
+ if ! ip -net "$listener_ns" route add local $local_addr/0 dev lo table 100; then
ip netns exec "$listener_ns" nft flush ruleset
ip -net "$listener_ns" $r6flag rule del fwmark 1 lookup 100
echo "SKIP: $msg, ip route add local $local_addr failed"
@@ -844,7 +862,7 @@ stop_if_error "Could not even run ping tests"
echo -n "INFO: Using loss of $tc_loss "
test "$tc_delay" -gt 0 && echo -n "delay $tc_delay ms "
-reorder_delay=$(($tc_delay / 4))
+reorder_delay=$((tc_delay / 4))
if [ -z "${tc_reorder}" ]; then
reorder1=$((RANDOM%10))
--
2.43.0