[net-next v4 3/3] selftests/sysctl: add sysctl macro test

[xiangxia.m.yue@xxxxxxxxx]

From: Tonghao Zhang <xiangxia.m.yue@xxxxxxxxx>

Cc: Luis Chamberlain <mcgrof@xxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Iurii Zaikin <yzaikin@xxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Jakub Kicinski <kuba@xxxxxxxxxx>
Cc: Paolo Abeni <pabeni@xxxxxxxxxx>
Cc: Hideaki YOSHIFUJI <yoshfuji@xxxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxxx>
Cc: Simon Horman <horms@xxxxxxxxxxxx>
Cc: Julian Anastasov <ja@xxxxxx>
Cc: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Cc: Jozsef Kadlecsik <kadlec@xxxxxxxxxxxxx>
Cc: Florian Westphal <fw@xxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Alexei Starovoitov <ast@xxxxxxxxxx>
Cc: Eric Dumazet <edumazet@xxxxxxxxxx>
Cc: Lorenz Bauer <lmb@xxxxxxxxxxxxxx>
Cc: Akhmat Karakotov <hmukos@xxxxxxxxxxxxxx>
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@xxxxxxxxx>
---
 lib/test_sysctl.c                        | 21 ++++++++++++
 tools/testing/selftests/sysctl/sysctl.sh | 43 ++++++++++++++++++++++++
 2 files changed, 64 insertions(+)

diff --git a/lib/test_sysctl.c b/lib/test_sysctl.c
index a5a3d6c27e1f..43b8d502f4c7 100644
--- a/lib/test_sysctl.c
+++ b/lib/test_sysctl.c
@@ -43,6 +43,7 @@ struct test_sysctl_data {
 	int int_0001;
 	int int_0002;
 	int int_0003[4];
+	int match_int[12];
 
 	int boot_int;
 
@@ -95,6 +96,13 @@ static struct ctl_table test_table[] = {
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec,
 	},
+	{
+		.procname	= "match_int",
+		.data		= &test_data.match_int,
+		.maxlen		= sizeof(test_data.match_int),
+		.mode		= 0444,
+		.proc_handler	= proc_dointvec,
+	},
 	{
 		.procname	= "boot_int",
 		.data		= &test_data.boot_int,
@@ -132,6 +140,19 @@ static struct ctl_table_header *test_sysctl_header;
 
 static int __init test_sysctl_init(void)
 {
+	test_data.match_int[0] = *(int *)SYSCTL_ZERO,
+	test_data.match_int[1] = *(int *)SYSCTL_ONE,
+	test_data.match_int[2] = *(int *)SYSCTL_TWO,
+	test_data.match_int[3] = *(int *)SYSCTL_THREE,
+	test_data.match_int[4] = *(int *)SYSCTL_FOUR,
+	test_data.match_int[5] = *(int *)SYSCTL_ONE_HUNDRED,
+	test_data.match_int[6] = *(int *)SYSCTL_TWO_HUNDRED,
+	test_data.match_int[7] = *(int *)SYSCTL_ONE_THOUSAND,
+	test_data.match_int[8] = *(int *)SYSCTL_THREE_THOUSAND,
+	test_data.match_int[9] = *(int *)SYSCTL_INT_MAX,
+	test_data.match_int[10] = *(int *)SYSCTL_MAXOLDUID,
+	test_data.match_int[11] = *(int *)SYSCTL_NEG_ONE,
+
 	test_data.bitmap_0001 = kzalloc(SYSCTL_TEST_BITMAP_SIZE/8, GFP_KERNEL);
 	if (!test_data.bitmap_0001)
 		return -ENOMEM;
diff --git a/tools/testing/selftests/sysctl/sysctl.sh b/tools/testing/selftests/sysctl/sysctl.sh
index 19515dcb7d04..cd74f4749748 100755
--- a/tools/testing/selftests/sysctl/sysctl.sh
+++ b/tools/testing/selftests/sysctl/sysctl.sh
@@ -40,6 +40,7 @@ ALL_TESTS="$ALL_TESTS 0004:1:1:uint_0001"
 ALL_TESTS="$ALL_TESTS 0005:3:1:int_0003"
 ALL_TESTS="$ALL_TESTS 0006:50:1:bitmap_0001"
 ALL_TESTS="$ALL_TESTS 0007:1:1:boot_int"
+ALL_TESTS="$ALL_TESTS 0008:1:1:match_int"
 
 function allow_user_defaults()
 {
@@ -785,6 +786,47 @@ sysctl_test_0007()
 	return $ksft_skip
 }
 
+sysctl_test_0008()
+{
+	TARGET="${SYSCTL}/match_int"
+	if [ ! -f $TARGET ]; then
+		echo "Skipping test for $TARGET as it is not present ..."
+		return $ksft_skip
+	fi
+
+	echo -n "Testing if $TARGET is matched with kernel ..."
+	ORIG_VALUES=$(cat "${TARGET}")
+
+	# SYSCTL_ZERO		0
+	# SYSCTL_ONE		1
+	# SYSCTL_TWO		2
+	# SYSCTL_THREE		3
+	# SYSCTL_FOUR		4
+	# SYSCTL_ONE_HUNDRED	100
+	# SYSCTL_TWO_HUNDRED	200
+	# SYSCTL_ONE_THOUSAND	1000
+	# SYSCTL_THREE_THOUSAND 3000
+	# SYSCTL_INT_MAX	INT_MAX
+	# SYSCTL_MAXOLDUID	65535
+	# SYSCTL_NEG_ONE	-1
+	local VALUES=(0 1 2 3 4 100 200 1000 3000 $INT_MAX 65535 -1)
+	idx=0
+
+	for ori in $ORIG_VALUES; do
+		val=${VALUES[$idx]}
+		if [ $ori -ne $val ]; then
+			echo "Expected $val, got $ori, TEST FAILED"
+			rc=1
+			test_rc
+		fi
+
+		let idx=$idx+1
+	done
+
+	echo "ok"
+	return 0
+}
+
 list_tests()
 {
 	echo "Test ID list:"
@@ -800,6 +842,7 @@ list_tests()
 	echo "0005 x $(get_test_count 0005) - tests proc_douintvec() array"
 	echo "0006 x $(get_test_count 0006) - tests proc_do_large_bitmap()"
 	echo "0007 x $(get_test_count 0007) - tests setting sysctl from kernel boot param"
+	echo "0008 x $(get_test_count 0008) - tests sysctl macro values match"
 }
 
 usage()
-- 
2.27.0