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Subject[PATCH v5 6/9] test_sysctl: Add range clamping test
Date
Add a range clamping test to verify that the input value will be
clamped if it exceeds the builtin maximum or minimum value.

Below is the expected test run result:

Running test: sysctl_test_0006 - run #0
Checking range minimum clamping ... ok
Checking range maximum clamping ... ok
Checking range minimum clamping ... ok
Checking range maximum clamping ... ok

Signed-off-by: Waiman Long <longman@redhat.com>
---
lib/test_sysctl.c | 29 ++++++++++++++++++
tools/testing/selftests/sysctl/sysctl.sh | 52 ++++++++++++++++++++++++++++++++
2 files changed, 81 insertions(+)

diff --git a/lib/test_sysctl.c b/lib/test_sysctl.c
index 3dd801c..7bb4cf7 100644
--- a/lib/test_sysctl.c
+++ b/lib/test_sysctl.c
@@ -38,12 +38,18 @@

static int i_zero;
static int i_one_hundred = 100;
+static int signed_min = -10;
+static int signed_max = 10;
+static unsigned int unsigned_min = 10;
+static unsigned int unsigned_max = 30;

struct test_sysctl_data {
int int_0001;
int int_0002;
int int_0003[4];
+ int range_0001;

+ unsigned int urange_0001;
unsigned int uint_0001;

char string_0001[65];
@@ -58,6 +64,9 @@ struct test_sysctl_data {
.int_0003[2] = 2,
.int_0003[3] = 3,

+ .range_0001 = 0,
+ .urange_0001 = 20,
+
.uint_0001 = 314,

.string_0001 = "(none)",
@@ -102,6 +111,26 @@ struct test_sysctl_data {
.mode = 0644,
.proc_handler = proc_dostring,
},
+ {
+ .procname = "range_0001",
+ .data = &test_data.range_0001,
+ .maxlen = sizeof(test_data.range_0001),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .flags = CTL_FLAGS_CLAMP_RANGE_SIGNED,
+ .extra1 = &signed_min,
+ .extra2 = &signed_max,
+ },
+ {
+ .procname = "urange_0001",
+ .data = &test_data.urange_0001,
+ .maxlen = sizeof(test_data.urange_0001),
+ .mode = 0644,
+ .proc_handler = proc_douintvec_minmax,
+ .flags = CTL_FLAGS_CLAMP_RANGE_UNSIGNED,
+ .extra1 = &unsigned_min,
+ .extra2 = &unsigned_max,
+ },
{ }
};

diff --git a/tools/testing/selftests/sysctl/sysctl.sh b/tools/testing/selftests/sysctl/sysctl.sh
index ec232c3..1aa1bba 100755
--- a/tools/testing/selftests/sysctl/sysctl.sh
+++ b/tools/testing/selftests/sysctl/sysctl.sh
@@ -34,6 +34,7 @@ ALL_TESTS="$ALL_TESTS 0002:1:1"
ALL_TESTS="$ALL_TESTS 0003:1:1"
ALL_TESTS="$ALL_TESTS 0004:1:1"
ALL_TESTS="$ALL_TESTS 0005:3:1"
+ALL_TESTS="$ALL_TESTS 0006:1:1"

test_modprobe()
{
@@ -543,6 +544,38 @@ run_stringtests()
test_rc
}

+# TARGET, RANGE_MIN & RANGE_MAX need to be defined before running test.
+run_range_clamping_test()
+{
+ rc=0
+
+ echo -n "Checking range minimum clamping ... "
+ VAL=$((RANGE_MIN - 1))
+ echo -n $VAL > "${TARGET}" 2> /dev/null
+ EXITVAL=$?
+ NEWVAL=$(cat "${TARGET}")
+ if [[ $EXITVAL -ne 0 || $NEWVAL -ne $RANGE_MIN ]]; then
+ echo "FAIL" >&2
+ rc=1
+ else
+ echo "ok"
+ fi
+
+ echo -n "Checking range maximum clamping ... "
+ VAL=$((RANGE_MAX + 1))
+ echo -n $VAL > "${TARGET}" 2> /dev/null
+ EXITVAL=$?
+ NEWVAL=$(cat "${TARGET}")
+ if [[ $EXITVAL -ne 0 || $NEWVAL -ne $RANGE_MAX ]]; then
+ echo "FAIL" >&2
+ rc=1
+ else
+ echo "ok"
+ fi
+
+ test_rc
+}
+
sysctl_test_0001()
{
TARGET="${SYSCTL}/int_0001"
@@ -600,6 +633,25 @@ sysctl_test_0005()
run_limit_digit_int_array
}

+sysctl_test_0006()
+{
+ TARGET="${SYSCTL}/range_0001"
+ ORIG=$(cat "${TARGET}")
+ RANGE_MIN=-10
+ RANGE_MAX=10
+
+ run_range_clamping_test
+ set_orig
+
+ TARGET="${SYSCTL}/urange_0001"
+ ORIG=$(cat "${TARGET}")
+ RANGE_MIN=10
+ RANGE_MAX=30
+
+ run_range_clamping_test
+ set_orig
+}
+
list_tests()
{
echo "Test ID list:"
--
1.8.3.1
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