On Fri, Oct 11, 2019 at 07:37:57PM -0700, Iurii Zaikin wrote:
KUnit tests for decoding extended 64 bit timestamps that verify the seconds part of [a/c/m] timestamps in ext4 inode structs are decoded correctly. KUnit tests, which run on boot and output the results to the debug log in TAP format (http://testanything.org/). are only useful for kernel devs running KUnit test harness. Not for inclusion into a production build. Test data is derive from the table under
nit: ^ Should be: derived from ...
Documentation/filesystems/ext4/inodes.rst Inode Timestamps.
Signed-off-by: Iurii Zaikin yzaikin@google.com
Reviewed-by: Brendan Higgins brendanhiggins@google.com Tested-by: Brendan Higgins brendanhiggins@google.com
fs/ext4/Kconfig | 14 +++ fs/ext4/Makefile | 1 + fs/ext4/inode-test.c | 239 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 254 insertions(+) create mode 100644 fs/ext4/inode-test.c
[...]
diff --git a/fs/ext4/inode-test.c b/fs/ext4/inode-test.c new file mode 100644 index 000000000000..3b3a453ff382 --- /dev/null +++ b/fs/ext4/inode-test.c @@ -0,0 +1,239 @@ +// 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"
+/* binary: 00000000 00000000 00000000 00000000 */ +#define LOWER_MSB_0 0L +/* binary: 01111111 11111111 11111111 11111111 */ +#define UPPER_MSB_0 0x7fffffffL +/* binary: 10000000 00000000 00000000 00000000 */ +#define LOWER_MSB_1 (-0x80000000L) +/* binary: 11111111 11111111 11111111 11111111 */ +#define UPPER_MSB_1 (-1L) +/* binary: 00111111 11111111 11111111 11111111 */ +#define MAX_NANOSECONDS ((1L << 30) - 1)
+#define CASE_NAME_FORMAT "%s: msb:%x lower_bound:%x extra_bits: %x"
+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;
+}
+/*
- These tests are derived from the table under
- Documentation/filesystems/ext4/inodes.rst Inode Timestamps
- */
+static void inode_test_xtimestamp_decoding(struct kunit *test) +{
- const struct timestamp_expectation test_data[] = {
{.test_case_name ="1901-12-13 Lower bound of 32bit < 0 timestamp, no extra bits.",
nit: Maybe drop the period at the end (here and elsewhere)? Otherwise if the test fails you have a period right next to a colon and it looks a bit off.
.msb_set = true,.lower_bound = true,.extra_bits = 0,.expected = {.tv_sec = -0x80000000LL, .tv_nsec = 0L},},
Feel free to ignore my nits if you don't need to send another version. Also note that Ted has given a Reviewed-by on an earlier revision.
Thanks!