[LTP] [PATCH 3/3] syscalls/preadv202: Add new testcase

[Xiao Yang <yangx.jy@cn.fujitsu.com>]

Hi Jan,

preadv202 has used tst_get_bad_addr() instead of the hardcoded -1 to 
test  EFAULT, so is it
necessary to test EFAULT on s390 by truncating file as commit 856383c 
does?  Perhaps, we
can remove the truncation if it is unnecessary.   Sorry, i don't have 
s390 to confirm it.

Best Regards,
Xiao Yang
On 2018/10/04 20:19, Cyril Hrubis wrote:
> Hi!
>> Note:
>>  From preadv2(2) manpage, preadv2() with invalid flag should return
>> EINVAL, but it actually returned EOPNOTSUPP in current upstream
>> kernel, as below:
>> ---------------------------------------------------------------
>> include/uapi/linux/fs.h:
>> define RWF_SUPPORTED   (RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT |\
>>                           RWF_APPEND)
>> ...
>>
>> include/linux/fs.h:
>> static inline int kiocb_set_rw_flags(struct kiocb *ki, rwf_t flags)
>> {
>>          if (unlikely(flags&  ~RWF_SUPPORTED)) {
>>                  return -EOPNOTSUPP;
>>          }
>> ...
>> ---------------------------------------------------------------
>>
>> We use EOPNOTSUPP as expected errno for the time being.
> This is probably worth a patch for the man-pages project, will you take
> care of that?
>
> Pushed with a minor change, I've changed the EFAULT test to get address
> from tst_get_bad_addr() instead of the hardcoded -1.
>
> Thanks!
>