[Linux-cachefs] [PATCH 04/09] cifs: define superblock-level cache index objects and register them

[Jeff Layton]

On Tue, 20 Jul 2010 08:53:27 -0400
Jeff Layton <jlayton at samba.org> wrote:

> On Mon,  5 Jul 2010 18:12:27 +0530
> Suresh Jayaraman <sjayaraman at suse.de> wrote:
> 
> > Define superblock-level cache index objects (managed by cifsTconInfo structs).
> > Each superblock object is created in a server-level index object and in itself
> > an index into which inode-level objects are inserted.
> > 
> > The superblock object is keyed by sharename. The UniqueId/IndexNumber is used to
> > validate that the exported share is the same since we accessed it last time.
> > 
> > Signed-off-by: Suresh Jayaraman <sjayaraman at suse.de>
> 
> Hmm...Steve started merging these already but I've just now had the
> chance to review them.
> 
> This approach may be a problem. It seems to make the assumption that
> there is only a single tcon per superblock. How exactly will this work
> when there are multiple tcons per superblock as will be the case with
> multisession mounts?
> 
> By having a cache cookie per tcon, will that mean that you'll
> potentially have multiple versions of cached inodes (one for each tcon)?
> 

Ahh nm. This shouldn't be a problem since this key is based on the
sharename only and that will be the same between the multiple tcons.

Please disregard!
-- 
Jeff Layton <jlayton at samba.org>