Re: [PATCH 2/5] vfs: create a generic checking function for FS_IOC_FSSETXATTR

[Darrick J. Wong]

On Wed, Jun 26, 2019 at 08:43:02AM -0700, Christoph Hellwig wrote:
> On Wed, Jun 26, 2019 at 08:35:42AM -0700, Darrick J. Wong wrote:
> > > static inline void simple_fill_fsxattr(struct fsxattr *fa, unsigned xflags)
> > > {
> > > 	memset(fa, 0, sizeof(*fa));
> > > 	fa->fsx_xflags = xflags;
> > > }
> > > 
> > > and let the compiler optimize the crap out?
> > 
> > The v2 series used to do that, but Christoph complained that having a
> > helper for a two-line memset and initialization was silly[1] so now we
> > have this version.
> > 
> > I don't mind reinstating it as a static inline helper, but I'd like some
> > input from any of the btrfs developers (or you, Al) about which form is
> > preferred.
> 
> I complained having that helper in btrfs.  I think Al wants a generic
> one, which at least makes a little more sense.

Ok.

> That being said I wonder if we should lift these attr ioctls to
> file op methods and deal with all that crap in VFS code instead of
> having all those duplicated ioctl parsers.

That sounds like an excellent next patchset. :)

--D