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// SPDX-License-Identifier: GPL-2.0
/*
* KUnit test of proc sysctl.
*/
#include <kunit/test.h>
#include <linux/printk.h>
#include <linux/sysctl.h>
#include <linux/uaccess.h>
static int i_zero;
static int i_one_hundred = 100;
struct test_sysctl_data {
int int_0001;
int int_0002;
int int_0003[4];
unsigned int uint_0001;
char string_0001[65];
};
static struct test_sysctl_data test_data = {
.int_0001 = 60,
.int_0002 = 1,
.int_0003[0] = 0,
.int_0003[1] = 1,
.int_0003[2] = 2,
.int_0003[3] = 3,
.uint_0001 = 314,
.string_0001 = "(none)",
};
static void sysctl_test_dointvec_null_tbl_data(struct kunit *test)
{
struct ctl_table table = {
.procname = "foo",
.data = NULL,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
.extra1 = &i_zero,
.extra2 = &i_one_hundred,
};
void *buffer = kunit_kzalloc(test, sizeof(int), GFP_USER);
size_t len;
loff_t pos;
len = 1234;
KUNIT_EXPECT_EQ(test, 0, proc_dointvec(&table, 0, buffer, &len, &pos));
KUNIT_EXPECT_EQ(test, 0, len);
len = 1234;
KUNIT_EXPECT_EQ(test, 0, proc_dointvec(&table, 1, buffer, &len, &pos));
KUNIT_EXPECT_EQ(test, 0, len);
}
static void sysctl_test_dointvec_table_maxlen_unset(struct kunit *test)
{
struct ctl_table table = {
.procname = "foo",
.data = &test_data.int_0001,
.maxlen = 0,
.mode = 0644,
.proc_handler = proc_dointvec,
.extra1 = &i_zero,
.extra2 = &i_one_hundred,
};
void *buffer = kunit_kzalloc(test, sizeof(int), GFP_USER);
size_t len;
loff_t pos;
len = 1234;
KUNIT_EXPECT_EQ(test, 0, proc_dointvec(&table, 0, buffer, &len, &pos));
KUNIT_EXPECT_EQ(test, 0, len);
len = 1234;
KUNIT_EXPECT_EQ(test, 0, proc_dointvec(&table, 1, buffer, &len, &pos));
KUNIT_EXPECT_EQ(test, 0, len);
}
static void sysctl_test_dointvec_table_len_is_zero(struct kunit *test)
{
struct ctl_table table = {
.procname = "foo",
.data = &test_data.int_0001,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
.extra1 = &i_zero,
.extra2 = &i_one_hundred,
};
void *buffer = kunit_kzalloc(test, sizeof(int), GFP_USER);
size_t len;
loff_t pos;
len = 0;
KUNIT_EXPECT_EQ(test, 0, proc_dointvec(&table, 0, buffer, &len, &pos));
KUNIT_EXPECT_EQ(test, 0, len);
KUNIT_EXPECT_EQ(test, 0, proc_dointvec(&table, 1, buffer, &len, &pos));
KUNIT_EXPECT_EQ(test, 0, len);
}
static void sysctl_test_dointvec_table_read_but_position_set(struct kunit *test)
{
struct ctl_table table = {
.procname = "foo",
.data = &test_data.int_0001,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
.extra1 = &i_zero,
.extra2 = &i_one_hundred,
};
void *buffer = kunit_kzalloc(test, sizeof(int), GFP_USER);
size_t len;
loff_t pos;
len = 1234;
pos = 1;
KUNIT_EXPECT_EQ(test, 0, proc_dointvec(&table, 0, buffer, &len, &pos));
KUNIT_EXPECT_EQ(test, 0, len);
}
static void sysctl_test_dointvec_happy_single_positive(struct kunit *test)
{
struct ctl_table table = {
.procname = "foo",
.data = &test_data.int_0001,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
.extra1 = &i_zero,
.extra2 = &i_one_hundred,
};
char input[] = "9";
size_t len = sizeof(input) - 1;
loff_t pos = 0;
table.data = kunit_kzalloc(test, sizeof(int), GFP_USER);
KUNIT_EXPECT_EQ(test, 0, proc_dointvec(&table, 1, input, &len, &pos));
KUNIT_EXPECT_EQ(test, sizeof(input) - 1, len);
KUNIT_EXPECT_EQ(test, sizeof(input) - 1, pos);
KUNIT_EXPECT_EQ(test, 9, *(int *)table.data);
}
static void sysctl_test_dointvec_happy_single_negative(struct kunit *test)
{
struct ctl_table table = {
.procname = "foo",
.data = &test_data.int_0001,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
.extra1 = &i_zero,
.extra2 = &i_one_hundred,
};
char input[] = "-9";
size_t len = sizeof(input) - 1;
loff_t pos = 0;
table.data = kunit_kzalloc(test, sizeof(int), GFP_USER);
KUNIT_EXPECT_EQ(test, 0, proc_dointvec(&table, 1, input, &len, &pos));
KUNIT_EXPECT_EQ(test, sizeof(input) - 1, len);
KUNIT_EXPECT_EQ(test, sizeof(input) - 1, pos);
KUNIT_EXPECT_EQ(test, -9, *(int *)table.data);
}
static void sysctl_test_dointvec_single_less_int_min(struct kunit *test)
{
struct ctl_table table = {
.procname = "foo",
.data = &test_data.int_0001,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
.extra1 = &i_zero,
.extra2 = &i_one_hundred,
};
char input[32];
size_t len = sizeof(input) - 1;
loff_t pos = 0;
long less_than_min = (long)INT_MIN - 1;
KUNIT_EXPECT_LT(test, less_than_min, INT_MIN);
KUNIT_EXPECT_LT(test,
snprintf(input, sizeof(input), "%ld", less_than_min),
sizeof(input));
table.data = kunit_kzalloc(test, sizeof(int), GFP_USER);
KUNIT_EXPECT_EQ(test, -EINVAL,
proc_dointvec(&table, 1, input, &len, &pos));
KUNIT_EXPECT_EQ(test, sizeof(input) - 1, len);
KUNIT_EXPECT_EQ(test, 0, *(int *)table.data);
}
static void sysctl_test_dointvec_single_greater_int_max(struct kunit *test)
{
struct ctl_table table = {
.procname = "foo",
.data = &test_data.int_0001,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
.extra1 = &i_zero,
.extra2 = &i_one_hundred,
};
char input[32];
size_t len = sizeof(input) - 1;
loff_t pos = 0;
long greater_than_max = (long)INT_MAX + 1;
KUNIT_EXPECT_GT(test, greater_than_max, INT_MAX);
KUNIT_EXPECT_LT(test, snprintf(input, sizeof(input), "%ld",
greater_than_max),
sizeof(input));
table.data = kunit_kzalloc(test, sizeof(int), GFP_USER);
KUNIT_EXPECT_EQ(test, -EINVAL,
proc_dointvec(&table, 1, input, &len, &pos));
KUNIT_EXPECT_EQ(test, sizeof(input) - 1, len);
KUNIT_EXPECT_EQ(test, 0, *(int *)table.data);
}
static int sysctl_test_init(struct kunit *test)
{
return 0;
}
/*
* This is run once after each test case, see the comment on example_test_module
* for more information.
*/
static void sysctl_test_exit(struct kunit *test)
{
}
/*
* Here we make a list of all the test cases we want to add to the test module
* below.
*/
static struct kunit_case sysctl_test_cases[] = {
/*
* This is a helper to create a test case object from a test case
* function; its exact function is not important to understand how to
* use KUnit, just know that this is how you associate test cases with a
* test module.
*/
KUNIT_CASE(sysctl_test_dointvec_null_tbl_data),
KUNIT_CASE(sysctl_test_dointvec_table_maxlen_unset),
KUNIT_CASE(sysctl_test_dointvec_table_len_is_zero),
KUNIT_CASE(sysctl_test_dointvec_table_read_but_position_set),
KUNIT_CASE(sysctl_test_dointvec_happy_single_positive),
KUNIT_CASE(sysctl_test_dointvec_happy_single_negative),
KUNIT_CASE(sysctl_test_dointvec_single_less_int_min),
KUNIT_CASE(sysctl_test_dointvec_single_greater_int_max),
{},
};
/*
* This defines a suite or grouping of tests.
*
* Test cases are defined as belonging to the suite by adding them to
* `test_cases`.
*
* Often it is desirable to run some function which will set up things which
* will be used by every test; this is accomplished with an `init` function
* which runs before each test case is invoked. Similarly, an `exit` function
* may be specified which runs after every test case and can be used to for
* cleanup. For clarity, running tests in a test module would behave as follows:
*
* module.init(test);
* module.test_case[0](test);
* module.exit(test);
* module.init(test);
* module.test_case[1](test);
* module.exit(test);
* ...;
*/
static struct kunit_module sysctl_test_module = {
.name = "sysctl_test",
.init = sysctl_test_init,
.exit = sysctl_test_exit,
.test_cases = sysctl_test_cases,
};
/*
* This registers the above test module telling KUnit that this is a suite of
* tests that need to be run.
*/
module_test(sysctl_test_module);