mirror of
https://github.com/torvalds/linux.git
synced 2024-11-18 18:11:56 +00:00
c475c77d5b
As tests are added to kunit, it will become less feasible to execute
all built tests together. By supporting modular tests we provide
a simple way to do selective execution on a running system; specifying
CONFIG_KUNIT=y
CONFIG_KUNIT_EXAMPLE_TEST=m
...means we can simply "insmod example-test.ko" to run the tests.
To achieve this we need to do the following:
o export the required symbols in kunit
o string-stream tests utilize non-exported symbols so for now we skip
building them when CONFIG_KUNIT_TEST=m.
o drivers/base/power/qos-test.c contains a few unexported interface
references, namely freq_qos_read_value() and freq_constraints_init().
Both of these could be potentially defined as static inline functions
in include/linux/pm_qos.h, but for now we simply avoid supporting
module build for that test suite.
o support a new way of declaring test suites. Because a module cannot
do multiple late_initcall()s, we provide a kunit_test_suites() macro
to declare multiple suites within the same module at once.
o some test module names would have been too general ("test-test"
and "example-test" for kunit tests, "inode-test" for ext4 tests);
rename these as appropriate ("kunit-test", "kunit-example-test"
and "ext4-inode-test" respectively).
Also define kunit_test_suite() via kunit_test_suites()
as callers in other trees may need the old definition.
Co-developed-by: Knut Omang <knut.omang@oracle.com>
Signed-off-by: Knut Omang <knut.omang@oracle.com>
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Acked-by: Theodore Ts'o <tytso@mit.edu> # for ext4 bits
Acked-by: David Gow <davidgow@google.com> # For list-test
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
275 lines
7.3 KiB
C
275 lines
7.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* KUnit test of ext4 inode that verify the seconds part of [a/c/m]
|
|
* timestamps in ext4 inode structs are decoded correctly.
|
|
*/
|
|
|
|
#include <kunit/test.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/time64.h>
|
|
|
|
#include "ext4.h"
|
|
|
|
/*
|
|
* For constructing the nonnegative timestamp lower bound value.
|
|
* binary: 00000000 00000000 00000000 00000000
|
|
*/
|
|
#define LOWER_MSB_0 0L
|
|
/*
|
|
* For constructing the nonnegative timestamp upper bound value.
|
|
* binary: 01111111 11111111 11111111 11111111
|
|
*
|
|
*/
|
|
#define UPPER_MSB_0 0x7fffffffL
|
|
/*
|
|
* For constructing the negative timestamp lower bound value.
|
|
* binary: 10000000 00000000 00000000 00000000
|
|
*/
|
|
#define LOWER_MSB_1 (-(UPPER_MSB_0) - 1L) /* avoid overflow */
|
|
/*
|
|
* For constructing the negative timestamp upper bound value.
|
|
* binary: 11111111 11111111 11111111 11111111
|
|
*/
|
|
#define UPPER_MSB_1 (-1L)
|
|
/*
|
|
* Upper bound for nanoseconds value supported by the encoding.
|
|
* binary: 00111111 11111111 11111111 11111111
|
|
*/
|
|
#define MAX_NANOSECONDS ((1L << 30) - 1)
|
|
|
|
#define CASE_NAME_FORMAT "%s: msb:%x lower_bound:%x extra_bits: %x"
|
|
|
|
#define LOWER_BOUND_NEG_NO_EXTRA_BITS_CASE\
|
|
"1901-12-13 Lower bound of 32bit < 0 timestamp, no extra bits"
|
|
#define UPPER_BOUND_NEG_NO_EXTRA_BITS_CASE\
|
|
"1969-12-31 Upper bound of 32bit < 0 timestamp, no extra bits"
|
|
#define LOWER_BOUND_NONNEG_NO_EXTRA_BITS_CASE\
|
|
"1970-01-01 Lower bound of 32bit >=0 timestamp, no extra bits"
|
|
#define UPPER_BOUND_NONNEG_NO_EXTRA_BITS_CASE\
|
|
"2038-01-19 Upper bound of 32bit >=0 timestamp, no extra bits"
|
|
#define LOWER_BOUND_NEG_LO_1_CASE\
|
|
"2038-01-19 Lower bound of 32bit <0 timestamp, lo extra sec bit on"
|
|
#define UPPER_BOUND_NEG_LO_1_CASE\
|
|
"2106-02-07 Upper bound of 32bit <0 timestamp, lo extra sec bit on"
|
|
#define LOWER_BOUND_NONNEG_LO_1_CASE\
|
|
"2106-02-07 Lower bound of 32bit >=0 timestamp, lo extra sec bit on"
|
|
#define UPPER_BOUND_NONNEG_LO_1_CASE\
|
|
"2174-02-25 Upper bound of 32bit >=0 timestamp, lo extra sec bit on"
|
|
#define LOWER_BOUND_NEG_HI_1_CASE\
|
|
"2174-02-25 Lower bound of 32bit <0 timestamp, hi extra sec bit on"
|
|
#define UPPER_BOUND_NEG_HI_1_CASE\
|
|
"2242-03-16 Upper bound of 32bit <0 timestamp, hi extra sec bit on"
|
|
#define LOWER_BOUND_NONNEG_HI_1_CASE\
|
|
"2242-03-16 Lower bound of 32bit >=0 timestamp, hi extra sec bit on"
|
|
#define UPPER_BOUND_NONNEG_HI_1_CASE\
|
|
"2310-04-04 Upper bound of 32bit >=0 timestamp, hi extra sec bit on"
|
|
#define UPPER_BOUND_NONNEG_HI_1_NS_1_CASE\
|
|
"2310-04-04 Upper bound of 32bit>=0 timestamp, hi extra sec bit 1. 1 ns"
|
|
#define LOWER_BOUND_NONNEG_HI_1_NS_MAX_CASE\
|
|
"2378-04-22 Lower bound of 32bit>= timestamp. Extra sec bits 1. Max ns"
|
|
#define LOWER_BOUND_NONNEG_EXTRA_BITS_1_CASE\
|
|
"2378-04-22 Lower bound of 32bit >=0 timestamp. All extra sec bits on"
|
|
#define UPPER_BOUND_NONNEG_EXTRA_BITS_1_CASE\
|
|
"2446-05-10 Upper bound of 32bit >=0 timestamp. All extra sec bits on"
|
|
|
|
struct timestamp_expectation {
|
|
const char *test_case_name;
|
|
struct timespec64 expected;
|
|
u32 extra_bits;
|
|
bool msb_set;
|
|
bool lower_bound;
|
|
};
|
|
|
|
static time64_t get_32bit_time(const struct timestamp_expectation * const test)
|
|
{
|
|
if (test->msb_set) {
|
|
if (test->lower_bound)
|
|
return LOWER_MSB_1;
|
|
|
|
return UPPER_MSB_1;
|
|
}
|
|
|
|
if (test->lower_bound)
|
|
return LOWER_MSB_0;
|
|
return UPPER_MSB_0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Test data is derived from the table in the Inode Timestamps section of
|
|
* Documentation/filesystems/ext4/inodes.rst.
|
|
*/
|
|
static void inode_test_xtimestamp_decoding(struct kunit *test)
|
|
{
|
|
const struct timestamp_expectation test_data[] = {
|
|
{
|
|
.test_case_name = LOWER_BOUND_NEG_NO_EXTRA_BITS_CASE,
|
|
.msb_set = true,
|
|
.lower_bound = true,
|
|
.extra_bits = 0,
|
|
.expected = {.tv_sec = -0x80000000LL, .tv_nsec = 0L},
|
|
},
|
|
|
|
{
|
|
.test_case_name = UPPER_BOUND_NEG_NO_EXTRA_BITS_CASE,
|
|
.msb_set = true,
|
|
.lower_bound = false,
|
|
.extra_bits = 0,
|
|
.expected = {.tv_sec = -1LL, .tv_nsec = 0L},
|
|
},
|
|
|
|
{
|
|
.test_case_name = LOWER_BOUND_NONNEG_NO_EXTRA_BITS_CASE,
|
|
.msb_set = false,
|
|
.lower_bound = true,
|
|
.extra_bits = 0,
|
|
.expected = {0LL, 0L},
|
|
},
|
|
|
|
{
|
|
.test_case_name = UPPER_BOUND_NONNEG_NO_EXTRA_BITS_CASE,
|
|
.msb_set = false,
|
|
.lower_bound = false,
|
|
.extra_bits = 0,
|
|
.expected = {.tv_sec = 0x7fffffffLL, .tv_nsec = 0L},
|
|
},
|
|
|
|
{
|
|
.test_case_name = LOWER_BOUND_NEG_LO_1_CASE,
|
|
.msb_set = true,
|
|
.lower_bound = true,
|
|
.extra_bits = 1,
|
|
.expected = {.tv_sec = 0x80000000LL, .tv_nsec = 0L},
|
|
},
|
|
|
|
{
|
|
.test_case_name = UPPER_BOUND_NEG_LO_1_CASE,
|
|
.msb_set = true,
|
|
.lower_bound = false,
|
|
.extra_bits = 1,
|
|
.expected = {.tv_sec = 0xffffffffLL, .tv_nsec = 0L},
|
|
},
|
|
|
|
{
|
|
.test_case_name = LOWER_BOUND_NONNEG_LO_1_CASE,
|
|
.msb_set = false,
|
|
.lower_bound = true,
|
|
.extra_bits = 1,
|
|
.expected = {.tv_sec = 0x100000000LL, .tv_nsec = 0L},
|
|
},
|
|
|
|
{
|
|
.test_case_name = UPPER_BOUND_NONNEG_LO_1_CASE,
|
|
.msb_set = false,
|
|
.lower_bound = false,
|
|
.extra_bits = 1,
|
|
.expected = {.tv_sec = 0x17fffffffLL, .tv_nsec = 0L},
|
|
},
|
|
|
|
{
|
|
.test_case_name = LOWER_BOUND_NEG_HI_1_CASE,
|
|
.msb_set = true,
|
|
.lower_bound = true,
|
|
.extra_bits = 2,
|
|
.expected = {.tv_sec = 0x180000000LL, .tv_nsec = 0L},
|
|
},
|
|
|
|
{
|
|
.test_case_name = UPPER_BOUND_NEG_HI_1_CASE,
|
|
.msb_set = true,
|
|
.lower_bound = false,
|
|
.extra_bits = 2,
|
|
.expected = {.tv_sec = 0x1ffffffffLL, .tv_nsec = 0L},
|
|
},
|
|
|
|
{
|
|
.test_case_name = LOWER_BOUND_NONNEG_HI_1_CASE,
|
|
.msb_set = false,
|
|
.lower_bound = true,
|
|
.extra_bits = 2,
|
|
.expected = {.tv_sec = 0x200000000LL, .tv_nsec = 0L},
|
|
},
|
|
|
|
{
|
|
.test_case_name = UPPER_BOUND_NONNEG_HI_1_CASE,
|
|
.msb_set = false,
|
|
.lower_bound = false,
|
|
.extra_bits = 2,
|
|
.expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 0L},
|
|
},
|
|
|
|
{
|
|
.test_case_name = UPPER_BOUND_NONNEG_HI_1_NS_1_CASE,
|
|
.msb_set = false,
|
|
.lower_bound = false,
|
|
.extra_bits = 6,
|
|
.expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 1L},
|
|
},
|
|
|
|
{
|
|
.test_case_name = LOWER_BOUND_NONNEG_HI_1_NS_MAX_CASE,
|
|
.msb_set = false,
|
|
.lower_bound = true,
|
|
.extra_bits = 0xFFFFFFFF,
|
|
.expected = {.tv_sec = 0x300000000LL,
|
|
.tv_nsec = MAX_NANOSECONDS},
|
|
},
|
|
|
|
{
|
|
.test_case_name = LOWER_BOUND_NONNEG_EXTRA_BITS_1_CASE,
|
|
.msb_set = false,
|
|
.lower_bound = true,
|
|
.extra_bits = 3,
|
|
.expected = {.tv_sec = 0x300000000LL, .tv_nsec = 0L},
|
|
},
|
|
|
|
{
|
|
.test_case_name = UPPER_BOUND_NONNEG_EXTRA_BITS_1_CASE,
|
|
.msb_set = false,
|
|
.lower_bound = false,
|
|
.extra_bits = 3,
|
|
.expected = {.tv_sec = 0x37fffffffLL, .tv_nsec = 0L},
|
|
}
|
|
};
|
|
|
|
struct timespec64 timestamp;
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(test_data); ++i) {
|
|
timestamp.tv_sec = get_32bit_time(&test_data[i]);
|
|
ext4_decode_extra_time(×tamp,
|
|
cpu_to_le32(test_data[i].extra_bits));
|
|
|
|
KUNIT_EXPECT_EQ_MSG(test,
|
|
test_data[i].expected.tv_sec,
|
|
timestamp.tv_sec,
|
|
CASE_NAME_FORMAT,
|
|
test_data[i].test_case_name,
|
|
test_data[i].msb_set,
|
|
test_data[i].lower_bound,
|
|
test_data[i].extra_bits);
|
|
KUNIT_EXPECT_EQ_MSG(test,
|
|
test_data[i].expected.tv_nsec,
|
|
timestamp.tv_nsec,
|
|
CASE_NAME_FORMAT,
|
|
test_data[i].test_case_name,
|
|
test_data[i].msb_set,
|
|
test_data[i].lower_bound,
|
|
test_data[i].extra_bits);
|
|
}
|
|
}
|
|
|
|
static struct kunit_case ext4_inode_test_cases[] = {
|
|
KUNIT_CASE(inode_test_xtimestamp_decoding),
|
|
{}
|
|
};
|
|
|
|
static struct kunit_suite ext4_inode_test_suite = {
|
|
.name = "ext4_inode_test",
|
|
.test_cases = ext4_inode_test_cases,
|
|
};
|
|
|
|
kunit_test_suites(&ext4_inode_test_suite);
|
|
|
|
MODULE_LICENSE("GPL v2");
|