[LTP] [PATCH v2] syscalls/statx04: use stx_attributes_mask before test

[Yang Xu <xuyang2018.jy@cn.fujitsu.com>]

on 2019/08/27 17:25, Petr Vorel wrote:

> Hi Yang,
>
>> stx_attributes_mask shows what's supported in stx_attributes.
>> we should check four attrbutes whether supports on tested filesystem
> typo attrbutes
>> and only test supported flags on tested filesystem.
> I'd change it to
> Set supp_{append,compr,immutable,nodump} attributes only on filesystems which
> actually support them.
>
>> Signed-off-by: Yang Xu<xuyang2018.jy@cn.fujitsu.com>
> Reviewed-by: Petr Vorel<pvorel@suse.cz>
Hi Petr

Thanks for your review.

>> ---
>>   testcases/kernel/syscalls/statx/statx04.c | 124 ++++++++++++++++------
> ...
>
>> -	attr |= FS_COMPR_FL | FS_APPEND_FL | FS_IMMUTABLE_FL | FS_NODUMP_FL;
>> +	if (supp_compr)
>> +		attr |= FS_COMPR_FL;
>> +	if (supp_append)
>> +		attr |= FS_APPEND_FL;
>> +	if (supp_immutable)
>> +		attr |= FS_IMMUTABLE_FL;
>> +	if (supp_nodump)
>> +		attr |= FS_NODUMP_FL;
>>   	ret = ioctl(fd, FS_IOC_SETFLAGS,&attr);
>>   	if (ret<  0) {
>> @@ -149,12 +176,43 @@ static void caid_flags_setup(void)
> Current code...
> 	if (supp_append)
> 		attr |= FS_APPEND_FL;
> 	if (supp_compr)
> 		attr |= FS_COMPR_FL;
> 	if (supp_immutable)
> 		attr |= FS_IMMUTABLE_FL;
> 	if (supp_nodump)
> 		attr |= FS_NODUMP_FL;
>
> 	ret = ioctl(fd, FS_IOC_SETFLAGS,&attr);
> 	if (ret<  0) {
> I wonder, if this check is still needed. Probably it's still useful to have
> sanity check, but "Flags not supported" has been caught
> by supp_{append,compr,immutable,nodump} variables.
It seems this check is redundant. In principle, if attributes_mask support these flags, the attribute should also
support them. Even though xfs filesystem missed attributes_mask after[1] and doesn't add it until [2]. But we don't
have the situation of having attribute_mask but not having attribute. So I think we can remove it.

[1]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5f955f26f3d42d
[2]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1b9598c8fb9965

Thanks
Yang Xu

> 		if (errno == EOPNOTSUPP)
> 			tst_brk(TCONF, "Flags not supported");
> 		tst_brk(TBROK | TERRNO, "ioctl(%i, FS_IOC_SETFLAGS, %i)", fd, attr);
> 	}
> ...
>
> Kind regards,
> Petr
>
>
> .
>