diff mbox series

[v6] selftests/clone3: Fix broken test under !CONFIG_TIME_NS

Message ID 1689066814-13295-1-git-send-email-yangtiezhu@loongson.cn
State New
Headers
Series [v6] selftests/clone3: Fix broken test under !CONFIG_TIME_NS |

Commit Message

Tiezhu Yang July 11, 2023, 9:13 a.m. UTC 
  When execute the following command to test clone3 under !CONFIG_TIME_NS:

  # make headers && cd tools/testing/selftests/clone3 && make && ./clone3

we can see the following error info:

  # [7538] Trying clone3() with flags 0x80 (size 0)
  # Invalid argument - Failed to create new process
  # [7538] clone3() with flags says: -22 expected 0
  not ok 18 [7538] Result (-22) is different than expected (0)
  ...
  # Totals: pass:18 fail:1 xfail:0 xpass:0 skip:0 error:0

This is because if CONFIG_TIME_NS is not set, but the flag
CLONE_NEWTIME (0x80) is used to clone a time namespace, it
will return -EINVAL in copy_time_ns().

If kernel does not support CONFIG_TIME_NS, /proc/self/ns/time
will be not exist, and then we should skip clone3() test with
CLONE_NEWTIME.

With this patch under !CONFIG_TIME_NS:

  # make headers && cd tools/testing/selftests/clone3 && make && ./clone3
  ...
  # Time namespaces are not supported
  ok 18 # SKIP Skipping clone3() with CLONE_NEWTIME
  ...
  # Totals: pass:18 fail:0 xfail:0 xpass:0 skip:1 error:0

Fixes: 515bddf0ec41 ("selftests/clone3: test clone3 with CLONE_NEWTIME")
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
---

v6: Rebase on 6.5-rc1 and update the commit message

 tools/testing/selftests/clone3/clone3.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

Comments

Tiezhu Yang Aug. 17, 2023, 7:22 a.m. UTC | #1 
Hi Shuah,

On 07/11/2023 05:13 PM, Tiezhu Yang wrote:
> When execute the following command to test clone3 under !CONFIG_TIME_NS:
>
>   # make headers && cd tools/testing/selftests/clone3 && make && ./clone3
>
> we can see the following error info:
>
>   # [7538] Trying clone3() with flags 0x80 (size 0)
>   # Invalid argument - Failed to create new process
>   # [7538] clone3() with flags says: -22 expected 0
>   not ok 18 [7538] Result (-22) is different than expected (0)
>   ...
>   # Totals: pass:18 fail:1 xfail:0 xpass:0 skip:0 error:0
>
> This is because if CONFIG_TIME_NS is not set, but the flag
> CLONE_NEWTIME (0x80) is used to clone a time namespace, it
> will return -EINVAL in copy_time_ns().
>
> If kernel does not support CONFIG_TIME_NS, /proc/self/ns/time
> will be not exist, and then we should skip clone3() test with
> CLONE_NEWTIME.
>
> With this patch under !CONFIG_TIME_NS:
>
>   # make headers && cd tools/testing/selftests/clone3 && make && ./clone3
>   ...
>   # Time namespaces are not supported
>   ok 18 # SKIP Skipping clone3() with CLONE_NEWTIME
>   ...
>   # Totals: pass:18 fail:0 xfail:0 xpass:0 skip:1 error:0
>
> Fixes: 515bddf0ec41 ("selftests/clone3: test clone3 with CLONE_NEWTIME")
> Suggested-by: Thomas Gleixner <tglx@linutronix.de>
> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
> ---
>
> v6: Rebase on 6.5-rc1 and update the commit message
>
>  tools/testing/selftests/clone3/clone3.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
>

Hi Shuah,

Any comments? I guess this should go through the linux-kselftest tree.

Thanks,
Tiezhu
Tiezhu Yang Oct. 12, 2023, 1:57 a.m. UTC | #2 
Cc: Andrew Morton <akpm@linux-foundation.org>

On 08/17/2023 03:22 PM, Tiezhu Yang wrote:
> Hi Shuah,
>
> On 07/11/2023 05:13 PM, Tiezhu Yang wrote:
>> When execute the following command to test clone3 under !CONFIG_TIME_NS:
>>
>>   # make headers && cd tools/testing/selftests/clone3 && make && ./clone3
>>
>> we can see the following error info:
>>
>>   # [7538] Trying clone3() with flags 0x80 (size 0)
>>   # Invalid argument - Failed to create new process
>>   # [7538] clone3() with flags says: -22 expected 0
>>   not ok 18 [7538] Result (-22) is different than expected (0)
>>   ...
>>   # Totals: pass:18 fail:1 xfail:0 xpass:0 skip:0 error:0
...
>>
>> Fixes: 515bddf0ec41 ("selftests/clone3: test clone3 with CLONE_NEWTIME")
>> Suggested-by: Thomas Gleixner <tglx@linutronix.de>
>> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
>> ---
>>
>> v6: Rebase on 6.5-rc1 and update the commit message
>>
>>  tools/testing/selftests/clone3/clone3.c | 7 ++++++-
>>  1 file changed, 6 insertions(+), 1 deletion(-)
>>
>
> Hi Shuah,
>
> Any comments? I guess this should go through the linux-kselftest tree.
>
> Thanks,
> Tiezhu
>

What is the status of this patch?

https://lore.kernel.org/lkml/1689066814-13295-1-git-send-email-yangtiezhu@loongson.cn/

This is a ping message, maybe you have forgot them?

Thanks,
Tiezhu
diff mbox series

Patch

diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
index e60cf4d..1c61e3c 100644
--- a/tools/testing/selftests/clone3/clone3.c
+++ b/tools/testing/selftests/clone3/clone3.c
@@ -196,7 +196,12 @@  int main(int argc, char *argv[])
 			CLONE3_ARGS_NO_TEST);
 
 	/* Do a clone3() in a new time namespace */
-	test_clone3(CLONE_NEWTIME, 0, 0, CLONE3_ARGS_NO_TEST);
+	if (access("/proc/self/ns/time", F_OK) == 0) {
+		test_clone3(CLONE_NEWTIME, 0, 0, CLONE3_ARGS_NO_TEST);
+	} else {
+		ksft_print_msg("Time namespaces are not supported\n");
+		ksft_test_result_skip("Skipping clone3() with CLONE_NEWTIME\n");
+	}
 
 	/* Do a clone3() with exit signal (SIGCHLD) in flags */
 	test_clone3(SIGCHLD, 0, -EINVAL, CLONE3_ARGS_NO_TEST);