[PATCHES BUG 13446] smbd: Cache dfree information based on query path

[Christof Schmitt]

On Mon, May 21, 2018 at 12:46:33PM -0700, Jeremy Allison wrote:
> On Fri, May 18, 2018 at 08:54:26PM -0700, Christof Schmitt via samba-technical wrote:
> > Forgot to include one patch to flush the cache on service reload. See
> > the last patch in this series.
> 
> Couple of comments. The key for the cache is incorrect, you're
> only using fname->base_name - this can easily be duplicated across
> different shares (for example, multiple shares all with a "TEMP"
> sub directory).
> 
> The cache key needs to be the absolute pathname, not the share
> relative one.

Right, i missed that. I will update this to get_full_smb_filename.

> Secondly, removing:
> 
> -       struct dfree_cached_info *dfree_info;
> 
> from the typedef struct connection_struct { is an ABI
> change for the VFS. Many VFS modules indirect into
> connection_struct *conn which will break if introduced
> as a back-pot for a patch.
> 
> So this change is OK for master (but you need a comment in
> source3/include/vfs.h to say you're changing the VFS interface
> ABI number, or at least logging the fact you're changing it
> as the number is already incremented for 4.9.0), but
> this part of the patch can't be back-ported for any
> released version.

Ok. It still makes sense to remove the unused part for master. Maybe i
will just remove the BUG line from the description, and add a comment
that this should not get backported.

Will send updated patches tomorrow.

Thanks for the review,

Christof