[LTP] [PATCH v3 5/5] kernel/syscalls: add new test with 'open() + O_TMPFILE'

[Jan Stancek <jstancek@redhat.com>]

----- Original Message -----
> From: "Cyril Hrubis" <chrubis@suse.cz>
> To: "Alexey Kodanev" <alexey.kodanev@oracle.com>
> Cc: "Jan Stancek" <jstancek@redhat.com>, "vasily isaenko" <vasily.isaenko@oracle.com>, ltp@lists.linux.it
> Sent: Monday, 25 April, 2016 5:07:35 PM
> Subject: Re: [LTP] [PATCH v3 5/5] kernel/syscalls: add new test with 'open() + O_TMPFILE'
> 
> Hi!
> > If the issue with mode... it can be because glibc doesn't process mode
> > argument unless O_CREAT is found. In our case we have O_TMPFILE instead.
> > 
> > Here is the link to bugzilla:
> > 
> > "open() and openat() ignore 'mode' with O_TMPFILE"
> > https://sourceware.org/bugzilla/show_bug.cgi?id=17523

Thanks. Jeff Bastian independently found this BZ as well. 
systemtap confirms, that mode remains 0, even when testcase is
passing non-zero values.

sys_openat ., dfd=0xffffffffffffff9c filename=0x40ac50 flags=0x404002 mode=0x0

> 
> What I see matches the the behavior in Comment 5.

I'm on aarch64, so that may explain why both fail for me.

After applying this patch:
  https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=65f6f938cd562a614a68e15d0581a34b177ec29d
both testcases passed.

Regards,
Jan