[PATCH net-next 38/38] kselftest/runner.sh: add netns support

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Add a variable RUN_IN_NETNS if user want to run all the test in name
space in parallel. With this, we can save a lot of testing time.

Nit: the NUM in run_one is not used, rename it to test_num.

Signed-off-by: Hangbin Liu <liuhangbin@xxxxxxxxx>
---
 tools/testing/selftests/kselftest/runner.sh | 26 +++++++++++++++++++--
 tools/testing/selftests/run_kselftest.sh    |  4 ++++
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/kselftest/runner.sh b/tools/testing/selftests/kselftest/runner.sh
index cd2fb43eea61..4306b716c115 100644
--- a/tools/testing/selftests/kselftest/runner.sh
+++ b/tools/testing/selftests/kselftest/runner.sh
@@ -6,6 +6,7 @@ export skip_rc=4
 export timeout_rc=124
 export logfile=/dev/stdout
 export per_test_logging=
+export RUN_IN_NETNS=
 
 # Defaults for "settings" file fields:
 # "timeout" how many seconds to let each test run before running
@@ -47,7 +48,7 @@ run_one()
 {
 	DIR="$1"
 	TEST="$2"
-	NUM="$3"
+	local test_num="$3"
 
 	BASENAME_TEST=$(basename $TEST)
 
@@ -141,6 +142,21 @@ run_one()
 	fi
 }
 
+run_in_netns()
+{
+	local netns=$(mktemp -u ${BASENAME_TEST}-XXXXXX)
+	local tmplog="/tmp/$(mktemp -u ${BASENAME_TEST}-XXXXXX)"
+	ip netns add $netns
+	if [ $? -ne 0 ]; then
+		echo "# Warning: Create namespace failed for $BASENAME_TEST"
+		echo "not ok $test_num selftests: $DIR: $BASENAME_TEST # Create NS failed"
+	fi
+	ip netns exec $netns bash -c "BASE_DIR=$BASE_DIR; source $BASE_DIR/kselftest/runner.sh; logfile=$logfile; run_one $DIR $TEST $test_num" &> $tmplog
+	ip netns del $netns &> /dev/null
+	cat $tmplog
+	rm -f $tmplog
+}
+
 run_many()
 {
 	echo "TAP version 13"
@@ -155,6 +171,12 @@ run_many()
 			logfile="/tmp/$BASENAME_TEST"
 			cat /dev/null > "$logfile"
 		fi
-		run_one "$DIR" "$TEST" "$test_num"
+		if [ -n "$RUN_IN_NETNS" ]; then
+			run_in_netns &
+		else
+			run_one "$DIR" "$TEST" "$test_num"
+		fi
 	done
+
+	wait
 }
diff --git a/tools/testing/selftests/run_kselftest.sh b/tools/testing/selftests/run_kselftest.sh
index 92743980e553..637aaa9e474a 100755
--- a/tools/testing/selftests/run_kselftest.sh
+++ b/tools/testing/selftests/run_kselftest.sh
@@ -25,6 +25,7 @@ Usage: $0 [OPTIONS]
   -c | --collection COLLECTION	Run all tests from COLLECTION
   -l | --list			List the available collection:test entries
   -d | --dry-run		Don't actually run any tests
+  -n | --netns			Run each test in namespace
   -h | --help			Show this usage info
   -o | --override-timeout	Number of seconds after which we timeout
 EOF
@@ -53,6 +54,9 @@ while true; do
 		-d | --dry-run)
 			dryrun="echo"
 			shift ;;
+		-n | --netns)
+			RUN_IN_NETNS=1
+			shift ;;
 		-o | --override-timeout)
 			kselftest_override_timeout="$2"
 			shift 2 ;;
-- 
2.41.0





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