Re: [PATCH 1/8] tests/9pfs: simplify fs_mkdir()

[Greg Kurz]

On Tue, 20 Oct 2020 15:43:21 +0200
Christian Schoenebeck <qemu_oss@crudebyte.com> wrote:

> On Dienstag, 20. Oktober 2020 15:35:36 CEST Greg Kurz wrote:
> > On Tue, 20 Oct 2020 01:13:23 +0200
> > 
> > Christian Schoenebeck <qemu_oss@crudebyte.com> wrote:
> > > Split out walking a directory path to a separate new utility function
> > > fs_walk_fid() and use that function in fs_mkdir().
> > > 
> > > The code difference saved this way is not much, but we'll use that new
> > > fs_walk_fid() function in the upcoming patches, so it will avoid quite
> > > some code duplication after all.
> > > 
> > > Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
> > > ---
> > > 
> > >  tests/qtest/virtio-9p-test.c | 23 ++++++++++++++++++-----
> > >  1 file changed, 18 insertions(+), 5 deletions(-)
> > > 
> > > diff --git a/tests/qtest/virtio-9p-test.c b/tests/qtest/virtio-9p-test.c
> > > index c15908f27b..dc724bbb1e 100644
> > > --- a/tests/qtest/virtio-9p-test.c
> > > +++ b/tests/qtest/virtio-9p-test.c
> > > @@ -967,13 +967,12 @@ static void fs_flush_ignored(void *obj, void *data,
> > > QGuestAllocator *t_alloc)> 
> > >      g_free(wnames[0]);
> > >  
> > >  }
> > > 
> > > -static void fs_mkdir(void *obj, void *data, QGuestAllocator *t_alloc,
> > > -                     const char *path, const char *cname)
> > > +/* utility function: walk to requested dir and return fid for that dir */
> > > +static uint32_t fs_walk_fid(void *obj, void *data, QGuestAllocator
> > > *t_alloc, +                            const char *path)
> > > 
> > >  {
> > 
> > Since fs_walk_fid() is a helper function, ie. not passed to qos_add_test(),
> > any reason to keep the "void *obj, void *data, QGuestAllocator *t_alloc"
> > based signature ? data and t_alloc aren't used at all and it seems that the
> > function should rather take a QVirtio9P * directly instead of casting from
> > a void *.
> > 
> > Something like:
> > 
> > static uint32_t fs_walk_fid(QVirtio9P *v9p, const char *path)
> > {
> > ...
> > }
> > 
> > 
> > Same remark applies to fs_mkdir() which isn't a top level test function
> > either BTW (sorry for not having spotted this earlier).
> 
> Good point. Typical case of being copy & waste induced. I'll change that.
> 

Well I guess I haven't set a good exemple by calling fs_attach() everywhere
instead of factoring out an helper in the first place... I have some spare
time, I'll fix that.

> Best regards,
> Christian Schoenebeck
> 
>