Re: [PATCH] afs: proc cells and rootcell are writeable

[David Howells <dhowells@redhat.com>]

Linus Torvalds <torvalds@linux-foundation.org> wrote:

> > -       p = proc_create("cells", 0, proc_afs, &afs_proc_cells_fops);
> > +       p = proc_create("cells", S_IFREG | S_IRUGO | S_IWUSR, proc_afs, &afs_proc_cells_fops);
> > -       p = proc_create("rootcell", 0, proc_afs, &afs_proc_rootcell_fops);
> > +       p = proc_create("rootcell", S_IFREG | S_IRUGO | S_IWUSR, proc_afs, &afs_proc_rootcell_fops);
> 
> So the S_IFREG isn't necessary.

True.  Is it worth creating proc_create_special() that can create a non-regular
file and then making proc_create() only permit regular files (and complain if
the S_IFMT field is not zero)?

> And quite frankly, I personally think S_IRUGO | S_IWUSR is _less_
> readable than 0644. It's damn hard to parse those random letter
> combinations, and at least I have to really think about it, in a way
> that the octal representation does *not* make me go "I have to think
> about that".

Fine by me.

David