* Re: ext4: add kunit test for decoding extended timestamps
[not found] <git-mailbomb-linux-master-1cbeab1b242d16fdb22dc3dab6a7d6afe746ae6d@kernel.org>
@ 2019-11-26 13:15 ` Geert Uytterhoeven
2019-11-27 0:10 ` Iurii Zaikin
0 siblings, 1 reply; 2+ messages in thread
From: Geert Uytterhoeven @ 2019-11-26 13:15 UTC (permalink / raw)
To: Iurii Zaikin
Cc: Shuah Khan, Brendan Higgins, Theodore Tso, Ext4 Developers List,
Linux Kernel Mailing List, open list:KERNEL SELFTEST FRAMEWORK
Hi Lurii,
On Tue, Nov 26, 2019 at 3:12 AM Linux Kernel Mailing List
<linux-kernel@vger.kernel.org> wrote:
> Commit: 1cbeab1b242d16fdb22dc3dab6a7d6afe746ae6d
> Parent: d460623c5fa126dc51bb2571dd7714ca75b0116c
> Refname: refs/heads/master
> Web: https://git.kernel.org/torvalds/c/1cbeab1b242d16fdb22dc3dab6a7d6afe746ae6d
> Author: Iurii Zaikin <yzaikin@google.com>
> AuthorDate: Thu Oct 17 15:12:33 2019 -0700
> Committer: Shuah Khan <skhan@linuxfoundation.org>
> CommitDate: Wed Oct 23 10:28:23 2019 -0600
>
> ext4: add kunit test for decoding extended timestamps
>
> 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.
>
> Test data is derived from the table in the Inode Timestamps section of
> Documentation/filesystems/ext4/inodes.rst.
>
> KUnit tests run during boot and output the results to the debug log
> in TAP format (http://testanything.org/). Only useful for kernel devs
> running KUnit test harness and are not for inclusion into a production
> build.
>
> Signed-off-by: Iurii Zaikin <yzaikin@google.com>
> Reviewed-by: Theodore Ts'o <tytso@mit.edu>
> Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
> Tested-by: Brendan Higgins <brendanhiggins@google.com>
> Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
While this test succeeds on arm64, it fails on m68k and arm32 (presumably
all 32-bit platforms?):
# Subtest: ext4_inode_test
1..1
# inode_test_xtimestamp_decoding: EXPECTATION FAILED at fs/ext4/inode-test.c:250
Expected test_data[i].expected.tv_sec == timestamp.tv_sec, but
test_data[i].expected.tv_sec == -2147483648
timestamp.tv_sec == 2147483648
1901-12-13 Lower bound of 32bit < 0 timestamp, no extra bits: msb:1
lower_bound:1 extra_bits: 0
# inode_test_xtimestamp_decoding: EXPECTATION FAILED at fs/ext4/inode-test.c:250
Expected test_data[i].expected.tv_sec == timestamp.tv_sec, but
test_data[i].expected.tv_sec == 2147483648
timestamp.tv_sec == 6442450944
2038-01-19 Lower bound of 32bit <0 timestamp, lo extra sec bit on:
msb:1 lower_bound:1 extra_bits: 1
# inode_test_xtimestamp_decoding: EXPECTATION FAILED at fs/ext4/inode-test.c:250
Expected test_data[i].expected.tv_sec == timestamp.tv_sec, but
test_data[i].expected.tv_sec == 6442450944
timestamp.tv_sec == 10737418240
2174-02-25 Lower bound of 32bit <0 timestamp, hi extra sec bit on:
msb:1 lower_bound:1 extra_bits: 2
not ok 1 - inode_test_xtimestamp_decoding
not ok 1 - ext4_inode_test
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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