Re: [LTP] mqns tests are failing

["Serge E. Hallyn" <serue@us.ibm.com>]

Quoting Garrett Cooper (yanegomi@gmail.com):
> On Wed, Apr 28, 2010 at 1:54 AM, Munipradeep Beerakam
> <mpradeep@linux.vnet.ibm.com> wrote:
> > Hi,
> >
> > I noticed that mqns test cases are failing. I am using March 2010 LTP.
> > After changing mq_open syscall in mqns_01.c file, test is passing. Same
> > thing is happening w.r.t. other mqns test cases. Below is the change I
> > made.
> >
> > Changed
> >   mqd = syscall(__NR_mq_open, SLASH_MQ1, O_RDWR|O_CREAT|O_EXCL,0777,
> > NULL);
> >
> > to
> >   mqd = mq_open(SLASH_MQ1, O_RDWR|O_CREAT|O_EXCL, 0777, NULL);
> >
> > Failure output I got is below:
> > # ./mqns_01
> > posixmq_namespace_01    0  TINFO  :  Testing posix mq namespaces through
> > unshare(2).
> >
> > mq_open: Permission denied
> > posixmq_namespace_01    1  TFAIL  :  mq_open failed
> >
> > After changing as above, I got the below output:
> > # ./mqns_01
> > posixmq_namespace_01    0  TINFO  :  Testing posix mq namespaces through
> > unshare(2).
> >
> > posixmq_namespace_01    0  TINFO  :  Checking namespaces isolation from
> > parent to child
> >
> > posixmq_namespace_01    1  TPASS  :  child process didn't find mqueue
> >
> > So, my question is that what is the difference between the two, i.e.,
> > the previous one and the changed one. Both are calling the same mq_open

See http://www.mail-archive.com/ltp-list@lists.sourceforge.net/msg09073.html
for the ansswer.

> > system call. But first one is failing whereas the second one is
> > succeeding.
> >
> > So, do we need to modify all mqns test cases to the new form?
> 
>     Track down the execution path by first starting with glibc. It
> might be a library vs kernel mismatch or a bug. Make sure that the
> syscall number matches per your architecture, determine whether or not
> your architecture has issues executing code in a biarch manner (64-bit
> on 32-bit) if it applies.
> HTH,

-serge

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