[PATCH 12/48] xfs: add CRC checking to dir2 leaf blocks

[Ben Myers]

On Wed, Jul 24, 2013 at 06:00:14PM -0500, Ben Myers wrote:
> On Fri, Jun 07, 2013 at 10:25:35AM +1000, Dave Chinner wrote:
> > From: Dave Chinner <dchinner at redhat.com>
> > 
> > This addition follows the same pattern as the dir2 block CRCs.
> > Seeing as both LEAF1 and LEAFN types need to changed at the same
> > time, this is a pretty large amount of change. leaf block headers
> > need to be abstracted away from the on-disk structures (struct
> > xfs_dir3_icleaf_hdr), as do the base leaf entry locations.
> > 
> > This header abstract allows the in-core header and leaf entry
> > location to be passed around instead of the leaf block itself. This
> > saves a lot of converting individual variables from on-disk format
> > to host format where they are used, so there's a good chance that
> > the compiler will be able to produce much more optimal code as it's
> > not having to byteswap variables all over the place.
> > 
> > Signed-off-by: Dave Chinner <dchinner at redhat.com>
> 
> Looks good.  Note that xfs_dir3_leafn_read_verify and
> xfs_dir3_leafn_write_verify are static in the kernel but not in userspace.  
> 
> Reviewed-by: Ben Myers <bpm at sgi.com>

corresponds to commit 24df33b45ecf5.