[LTP] [PATCH v2 1/3] syscalls/fanotify13: new test to verify FAN_REPORT_FID functionality

[Matthew Bobrowski <mbobrowski@mbobrowski.org>]

On Wed, May 15, 2019 at 05:50:03PM +0300, Amir Goldstein wrote:
> > On Fri, Apr 26, 2019 at 05:27:48PM +0200, Cyril Hrubis wrote:
> > > Hi!
> > > I've tried these tests on buildservice to check that there are no
> > > problems on slightly older distributions and found two.
> > >
> > > The first one is that we do define fallback definitions in fanotify.h
> > > but then ifdef the whole test code in #if defined(HAVE_SYS_FANOTIFY_H)
> > > so that it's efectively disabled on older distros even with fallback
> > > definitions in place. Also it's TST_TEST_TCONF() but that is just easy
> > > to fix typo. I guess that we can remove the ifdef and sys/fanotify.h
> > > include from the test sources since we conditionally include the
> > > sys/fanotify.h in the local fanotify.h already.
> >
> > OK. In that case I can write a patch that is to be applied prior to this series
> > which essentially just removes this specific preprocessor conditional directive
> > from all the source files. Would you like me to do this?
> 
> If I understand the concern correctly, it is not really important
> to address now for these new tests that check functionality only available
> since kernel v5.1. It could be addressed by followup work.

OK, no problem, this is fine with me.
 
> > > The second one is that we fail to compile on older distributions because
> > > of missing name_to_handle_at() so we need configure check for that
> > > syscall and fallback definition in lapi/ header, or at least configure
> > > check and ifdef in the fanotify_get_fid() function. Which should be as
> > > easy as adding a name_to_handle_at line to AC_CHECK_FUNCS() in the
> > > configure.ac and using the macro from config.h.
> >
> > Sure. I've gone ahead an updated it to accommodate for this. Prior to
> > submitting through another patches series, changes can be found here:
> > https://github.com/matthewbobrowski/ltp/commit/54264db0e574d2f90e716a510fcb1da11ee174dc.
> >
> > I think we can do better and also provide a fallback definition though,
> > thoughts? Don't believe that it would take much effort.
> 
> No reason to do that. Those tests will only be supported on kernel >= v5.1
> old distros are less interesting for these tests.
> 
> Please post the patches for fanotify_dirent_3 branch.

OK. I've rebased fanotify_dirent_3 of upstream/master and resubmitting
the patch series now.

-- 
Matthew Bobrowski