----- Original Message -----
> From: "Wanlong Gao" <[email protected]>
> To: "Nitin Yadav" <[email protected]>
> Cc: [email protected]
> Sent: Tuesday, 16 October, 2012 4:31:17 AM
> Subject: Re: [LTP] [PATCH] io_submit: uninitialized iocb may not return
> -EINVAL
>
> On 10/09/2012 02:08 PM, Nitin Yadav wrote:
> > Hi Wanlong,
> >
> > Below are the output where I am getting - EPERM (returned value =
> > 1) as a return value from io_submit.
> >
> > io_submit01 1 TPASS : expected failure - returned value = -22
> > : Invalid argument
> > io_submit01 2 TPASS : expected failure - returned value = -22
> > : Invalid argument
> > io_submit01 3 TFAIL : unexpected failure - returned value =
> > 1 : Unknown error 18446744073709551615, expected one of -EINVAL,
> > -EBADF, -EFAULT
> > io_submit01 4 TPASS : expected failure - returned value = -14
> > : Bad address
> > io_submit01 5 TPASS : expected failure - returned value = -22
> > : Invalid argument
> > io_submit01 6 TPASS : expected failure - returned value = -9
> > : Bad file descriptor
> > io_submit01 7 TPASS : expected success - returned value = 0
> > io_submit01 8 TPASS : expected success - returned value = 1
Notice that return value is positive (1). So it could be that some random data
succeeded and one iocb was actually submitted.
Regards,
Jan
> >
> > Could you please let me know can we consider - EPERM case as a
> > return value for io_submit.
>
> OK, maybe I missed something, so, can you show us how did you produce
> this in detail?
>
> Thanks,
> Wanlong Gao
>
> >
> > Thanks,
> > Nitin Yadav
> >
> >
> >
> > Hi Jan，
> >
> >>>> --- a/testcases/kernel/syscalls/io_submit/io_submit01.c
> >>>> +++ b/testcases/kernel/syscalls/io_submit/io_submit01.c
> >>>> @@ -126,7 +126,21 @@ int main(int argc, char *argv[])
> >>>> /* 1.3 - EINVAL: uninitialized iocb */
> >>>> iocbs[0] = &iocb;
> >>>> TEST(io_submit(ctx, 1, iocbs));
> >>>> - check_result(-EINVAL, TEST_RETURN);
> >>>> + switch(TEST_RETURN) {
> >>>> + case -EINVAL:
> >>>> + case -EBADF:
> >>>> + case -EFAULT:
> >>>> + case -EPERM:
> >>>
> >>>
> >>> I don't think io_submit(2) can return -EPERM.
> >>>
> >>> Do you think so?
> >>
> >> I was trying all sorts of random data and I remember seeing once
> >> "-1".
> >> I'm failing to reproduce it today, so I could be wrong. If I fail
> >> to find
> >> data that gives -EPERM, I'll remove it in v2.
> >
> >
> > I looked into the io_submit(2) code in kernel and didn't see any
> > path can
> > return -EPERM, so I think you should confirm on it again.
> >
> > Thanks,
> > Wanlong Gao
> >
> >>
> >> Regards,
> >> Jan
> >>
> >>>
> >>> Thanks,
> >>> Wanlong Gao
> >>>
> >>
> >>
> >
> >
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>
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