[LTP] [PATCH 3/3] fanotify10: Make evictable marks tests more reliable

[Cyril Hrubis]

Hi!@
> > > +	for (i = 0; i < max_file_multi; i++) {
> > > +		char path[PATH_MAX];
> > > +
> > > +		sprintf(path, FILE_PATH_MULTIDIR, i);
> > > +		SAFE_UNLINK(path);
> > > +		sprintf(path, DIR_PATH_MULTI, i);
> > > +		SAFE_RMDIR(path);
> > > +		sprintf(path, FILE_PATH_MULTI, i);
> > > +		SAFE_UNLINK(path);
> > > +	}
> > >  	SAFE_UNLINK(FILE_PATH);
> > > -	SAFE_UNLINK(FILE2_PATH);
> > >  	SAFE_RMDIR(SUBDIR_PATH);
> > >  	SAFE_RMDIR(DIR_PATH);
> > >  	SAFE_RMDIR(MNT2_PATH);
> 
> > Do we have to unlink anything at all?
> 
> > As far as I can tell we create these files on a device that is
> > reformatted after the test anyways.
> 
> It looks it's not cleared, because tmpdir is removed in do_cleanup(),
> which is called just before the end of testing, not for each filesystem:
> 
> https://github.com/linux-test-project/ltp/tree/master/lib
> 
> Files created for testing in test's setup() are called for each filesystem
> (do_test_setup), therefore files would remain created:
> 
> fanotify10.c:894: TBROK: mkdir(fs_mnt/testdir, 0755) failed: EEXIST (17)
> 
> Summary:
> passed   492
> failed   0
> broken   1
> skipped  3
> warnings 0
> 
> And even if we disable just SAFE_UNLINK(FILE_PATH); we get errors
> due our rmdir() implementation wanting directory being empty:
> 
> fanotify10.c:953: TWARN: rmdir(fs_mnt/testdir) failed: ENOTEMPTY (39)
> fanotify10.c:894: TBROK: mkdir(fs_mnt/testdir, 0755) failed: EEXIST (17)
> fanotify10.c:952: TWARN: rmdir(fs_mnt/testdir/testdir2) failed: ENOENT (2)
> fanotify10.c:953: TWARN: rmdir(fs_mnt/testdir) failed: ENOTEMPTY (39)
> fanotify10.c:954: TWARN: rmdir(mntpoint) failed: ENOENT (2)
> 
> IMHO it's safer to remove these files instead of creating them just for first
> filesystem. Having unique path for each filesystem (e.g. use filesystem name in
> the directory path would result would solve the need to remove files but
> probably not worth of implementing.

Hmm, I was commenting under an impression that we create all files on
the device and it looks like that is the case, but we do not run with
.all_filesystems but rather than that with .variants = 2 and of course
we call do_test_setup() for each test variant. So yes we run the test
twice with the same device and the cleanup is required.

-- 
Cyril Hrubis
chrubis@suse.cz