[XFS] decontaminate vnode operations from behavior details

All vnode ops now take struct xfs_inode pointers and the behaviour related
glue is split out into methods of it's own. This required fixing
xfs_create/mkdir/symlink to not mess with the inode pointer but rather use
a separate boolean for error handling. Thanks to Dave Chinner for that
fix.

SGI-PV: 969608
SGI-Modid: xfs-linux-melb:xfs-kern:29492a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
diff --git a/fs/xfs/xfs_dir2.c b/fs/xfs/xfs_dir2.c
index c2d2bef..12001bf 100644
--- a/fs/xfs/xfs_dir2.c
+++ b/fs/xfs/xfs_dir2.c
@@ -292,18 +292,16 @@
  */
 int
 xfs_readdir(
-	bhv_desc_t	*dir_bdp,
+	xfs_inode_t	*dp,
 	void		*dirent,
 	size_t		bufsize,
 	xfs_off_t	*offset,
 	filldir_t	filldir)
 {
-	xfs_inode_t	*dp = XFS_BHVTOI(dir_bdp);
 	int		rval;		/* return value */
 	int		v;		/* type-checking value */
 
-	vn_trace_entry(BHV_TO_VNODE(dir_bdp), __FUNCTION__,
-					       (inst_t *)__return_address);
+	vn_trace_entry(XFS_ITOV(dp), __FUNCTION__, (inst_t *)__return_address);
 
 	if (XFS_FORCED_SHUTDOWN(dp->i_mount))
 		return XFS_ERROR(EIO);