[LTP] [PATCH v3 3/3] syscalls/pipe2_03: Add new test for pipe2 O_DIRECT flag

[Li Wang]

Hi Xu,

Yang Xu <xuyang2018.jy@cn.fujitsu.com> wrote:

...
> >
> > # ./pipe2_03
> > tst_test.c:1246: INFO: Timeout per run is 0h 05m 00s
> > pipe2_03.c:48: PASS: Each write(2) uses a separate packet
> > pipe2_03.c:61: PASS: Each read(2) reads a separate packet
> > pipe2_03.c:81: PASS: write(higner than PIPE_BUF) split into multiple
> packet
> > pipe2_03.c:108: FAIL: the excess bytes in the packet is discarded by
> > read, expect 1 got 1%A
> Even I use one fork and exit(0), I don't meet this problem. Or, I miss
> something?
>

I think I got the point.

In your test code for pipe2(), you didn't use pipe in the correct way. Even
that we define the fds[2] as a global variable, there still have a new copy
for fds[2] in the child process, we should close one of the pipes in child
and parent to make the connection is built correspondingly, then that will
work normally for us.

I suggest redesigning some of the test structs. What do you think?

Fyi:
https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/syscalls/pipe/pipe02.c

-- 
Regards,
Li Wang
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