removing connection_struct argument from Samba3 VFS

[Jeremy Allison]

On Tue, May 30, 2006 at 11:09:22AM +1000, James Peach wrote:
> On Mon, 2006-05-29 at 21:31 +0200, Volker Lendecke wrote:
> > On Mon, May 29, 2006 at 12:12:49PM -0700, Jeremy Allison wrote:
> > > Yeah I know - it's the same argument used for a stable
> > > ABI in the Linux kernel....
> > > 
> > > We need to keep improving it though.
> > 
> > And i'm going to extend it again, this time with a reference
> > to current_user... :-)
> 
> I've also got another extension pending that I might as well get
> feedback on now ...
> 
> I have a patch that lets modules attach data to a files_struct. I also
> have 2 modules that use this to maintain per-fsp information. The most
> useful point to add per-fsp info is in SMB_VFS_OPEN, and initially I
> have replaced the file name parameter with an fsp (and made sure that
> the fsp_name member is always valid). Unfortunately, this approach
> doesn't work for vfs_catia, because it needs to transform the fname
> without modifying the fsp.
> 
> So I think the right way to do this is to pass both fname and fsp to
> SMB_VFS_NEXT. Comments?

Ahem. After your last change to HEAD I'm not going to say
yes to this :-).

Did you test the connection-removal patch before committing it ? :-) :-).

I suggest you take a look at the differences between vfs_init_default()
and vfs_init_custom() - specifically what (doesn't) happen to the
vfs_handles pointer in the connection struct :-) :-).

Yeah - you probably found a mis-design (ie. it never gets initialized
in the default case) but the code you committed could never have worked :-) :-).

It left conn->vfs_handles = 0x0 - which doesn't work too well with
dereferencing :-) :-).

Jeremy.