[LTP] [PATCH] syscalls/shmctl04: Add kernel version requestions

[xuyang2018.jy@fujitsu.com <xuyang2018.jy@fujitsu.com>]

Hi Gongyi
> Hi Xu,
>
> It looks good to me.
>
> On the other hand, msgctl06.c, semctl09.c have the same problem for MSG_STAT_ANY and SEM_STAT_ANY,  we can also fix them similarly?
Yes. We can fix them similarly.
>
> Thanks!
>
> Best Regards,
> Gongyi
>
>>
>> Hi Gongyi
>>> SHM_STAT_ANY is imported to linux in v4.17.
>>>
>>> Signed-off-by: Zhao Gongyi<zhaogongyi@huawei.com>
>>> ---
>>>    testcases/kernel/syscalls/ipc/shmctl/shmctl04.c | 1 +
>>>    1 file changed, 1 insertion(+)
>>>
>>> diff --git a/testcases/kernel/syscalls/ipc/shmctl/shmctl04.c
>>> b/testcases/kernel/syscalls/ipc/shmctl/shmctl04.c
>>> index 9e8ec4199..18ac8ba0a 100644
>>> --- a/testcases/kernel/syscalls/ipc/shmctl/shmctl04.c
>>> +++ b/testcases/kernel/syscalls/ipc/shmctl/shmctl04.c
>>> @@ -168,6 +168,7 @@ static void cleanup(void)
>>>    }
>>>
>>>    static struct tst_test test = {
>>> +	.min_kver = "4.17",
>> Some linux distribution such as centos7.8 has backported this feature, so
>> we should call SHM_STAT_ANY directly to detect whether kernel supports
>> SHM_STAT_ANY instead of using min_kver.
>>
>> code as below:
>> --- a/testcases/kernel/syscalls/ipc/shmctl/shmctl04.c
>> +++ b/testcases/kernel/syscalls/ipc/shmctl/shmctl04.c
>> @@ -155,10 +155,19 @@ static void verify_shminfo(unsigned int n)
>>    static void setup(void)
>>    {
>>           struct passwd *ltpuser = SAFE_GETPWNAM("nobody");
>> +       struct shmid_ds temp_ds;
>>           nobody_uid = ltpuser->pw_uid;
>>           root_uid = 0;
>>
>>           shm_id = SAFE_SHMGET(IPC_PRIVATE, SHM_SIZE, IPC_CREAT |
>> SHM_RW);
>> +       TEST(shmctl(shm_id, SHM_STAT_ANY,&temp_ds));
>> +       if (TST_RET == -1) {
>> +               if (TST_ERR == EINVAL)
>> +                       tst_brk(TCONF, "kernel doesn't support
>> SHM_STAT_ANY");
>> +               else
>> +                       tst_brk(TBROK | TTERRNO,
>> +                               "Current environment doesn't permit
>> SHM_STAT_ANY");
>> +       }
>>    }
>>
>>
>> Also, On your environment, does semctl09.c/msgctl06.c have the same
>> problem?
>>
>>>    	.setup = setup,
>>>    	.cleanup = cleanup,
>>>    	.test = verify_shminfo,
>>> --
>>> 2.17.1
>>>
>>>