linux/kernel/sysctl-test.c

// SPDX-License-Identifier: GPL-2.0
/*
 * KUnit test of proc sysctl.
 */

#include <kunit/test.h>
#include <linux/sysctl.h>

#define KUNIT_PROC_READ …
#define KUNIT_PROC_WRITE …

/*
 * Test that proc_dointvec will not try to use a NULL .data field even when the
 * length is non-zero.
 */
static void sysctl_test_api_dointvec_null_tbl_data(struct kunit *test)
{ … }

/*
 * Similar to the previous test, we create a struct ctrl_table that has a .data
 * field that proc_dointvec cannot do anything with; however, this time it is
 * because we tell proc_dointvec that the size is 0.
 */
static void sysctl_test_api_dointvec_table_maxlen_unset(struct kunit *test)
{ … }

/*
 * Here we provide a valid struct ctl_table, but we try to read and write from
 * it using a buffer of zero length, so it should still fail in a similar way as
 * before.
 */
static void sysctl_test_api_dointvec_table_len_is_zero(struct kunit *test)
{ … }

/*
 * Test that proc_dointvec refuses to read when the file position is non-zero.
 */
static void sysctl_test_api_dointvec_table_read_but_position_set(
		struct kunit *test)
{ … }

/*
 * Test that we can read a two digit number in a sufficiently size buffer.
 * Nothing fancy.
 */
static void sysctl_test_dointvec_read_happy_single_positive(struct kunit *test)
{ … }

/*
 * Same as previous test, just now with negative numbers.
 */
static void sysctl_test_dointvec_read_happy_single_negative(struct kunit *test)
{ … }

/*
 * Test that a simple positive write works.
 */
static void sysctl_test_dointvec_write_happy_single_positive(struct kunit *test)
{ … }

/*
 * Same as previous test, but now with negative numbers.
 */
static void sysctl_test_dointvec_write_happy_single_negative(struct kunit *test)
{ … }

/*
 * Test that writing a value smaller than the minimum possible value is not
 * allowed.
 */
static void sysctl_test_api_dointvec_write_single_less_int_min(
		struct kunit *test)
{ … }

/*
 * Test that writing the maximum possible value works.
 */
static void sysctl_test_api_dointvec_write_single_greater_int_max(
		struct kunit *test)
{ … }

/*
 * Test that registering an invalid extra value is not allowed.
 */
static void sysctl_test_register_sysctl_sz_invalid_extra_value(
		struct kunit *test)
{ … }

static struct kunit_case sysctl_test_cases[] = …;

static struct kunit_suite sysctl_test_suite = …;

kunit_test_suites(…);

MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;