On Wed, Oct 09, 2019 at 02:51:32PM +0200, Jan Kara wrote:
> On Wed 09-10-19 21:18:50, Matthew Bobrowski wrote:
> > > Just small nits below:
> > >
> > > > +static int ext4_handle_inode_extension(struct inode *inode, loff_t offset,
> > > > + ssize_t written, size_t count)
> > > > +{
> > > > + int ret = 0;
> > >
> > > I think both the function and callsites may be slightly simpler if you let
> > > the function return 'written' or error (not 0 or error). But I'll leave
> > > that decision upto you.
> >
> > Hm, don't we actually need to return 0 for success cases so that
> > iomap_dio_complete() behaves correctly i.e. increments iocb->ki_pos,
> > etc?
>
> Correct, iomap_dio_complete() expects 0 on success. So if we keep calling
> ext4_handle_inode_extension() from ->end_io handler, we'd need some
> specialcasing there and I agree that changing ext4_handle_inode_extension()
> return convention isn't then very beneficial. If we stop calling
> ext4_handle_inode_extension() from ->end_io handler (patch 8/8 discussion
> pending), then the change would be a clear win.
Agreed. Well, I think we've got some movement in the right direction in 8/8,
so it looks like changing up the return values is what we'll go ahead with.
--<M>--
