[XFS] Remove CFORK macros and use code directly in IFORK and DFORK macros.

Currently XFS_IFORK_* and XFS_DFORK* are implemented by means of
XFS_CFORK* macros. But given that XFS_IFORK_* operates on an xfs_inode
that embedds and xfs_icdinode_core and XFS_DFORK_* operates on an
xfs_dinode that embedds a xfs_dinode_core one will have to do endian
swapping while the other doesn't. Instead of having the current mess with
the CFORK macros that have byteswapping and non-byteswapping version
(which are inconsistantly named while we're at it) just define each family
of the macros to stand by itself and simplify the whole matter.

A few direct references to the CFORK variants were cleaned up to use IFORK
or DFORK to make this possible.

SGI-PV: 971186
SGI-Modid: xfs-linux-melb:xfs-kern:30163a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tim Shimmin <tes@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

1 files changed, 36 insertions, 11 deletions

diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index b2d7b2cd7851..a8d6f5e251aa 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -341,17 +341,42 @@ xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
 /*
  * Fork handling.
  */
-#define XFS_IFORK_PTR(ip,w)             \
-        ((w) == XFS_DATA_FORK ? &(ip)->i_df : (ip)->i_afp)
-#define XFS_IFORK_Q(ip)                 XFS_CFORK_Q(&(ip)->i_d)
-#define XFS_IFORK_DSIZE(ip)             XFS_CFORK_DSIZE(&ip->i_d, ip->i_mount)
-#define XFS_IFORK_ASIZE(ip)             XFS_CFORK_ASIZE(&ip->i_d, ip->i_mount)
-#define XFS_IFORK_SIZE(ip,w)            XFS_CFORK_SIZE(&ip->i_d, ip->i_mount, w)
-#define XFS_IFORK_FORMAT(ip,w)          XFS_CFORK_FORMAT(&ip->i_d, w)
-#define XFS_IFORK_FMT_SET(ip,w,n)       XFS_CFORK_FMT_SET(&ip->i_d, w, n)
-#define XFS_IFORK_NEXTENTS(ip,w)        XFS_CFORK_NEXTENTS(&ip->i_d, w)
-#define XFS_IFORK_NEXT_SET(ip,w,n)      XFS_CFORK_NEXT_SET(&ip->i_d, w, n)
 
+#define XFS_IFORK_Q(ip)                 ((ip)->i_d.di_forkoff != 0)
+#define XFS_IFORK_BOFF(ip)              ((int)((ip)->i_d.di_forkoff << 3))
+
+#define XFS_IFORK_PTR(ip,w)             \
+        ((w) == XFS_DATA_FORK ? \
+                &(ip)->i_df : \
+                (ip)->i_afp)
+#define XFS_IFORK_DSIZE(ip) \
+        (XFS_IFORK_Q(ip) ? \
+                XFS_IFORK_BOFF(ip) : \
+                XFS_LITINO((ip)->i_mount))
+#define XFS_IFORK_ASIZE(ip) \
+        (XFS_IFORK_Q(ip) ? \
+                XFS_LITINO((ip)->i_mount) - XFS_IFORK_BOFF(ip) : \
+                0)
+#define XFS_IFORK_SIZE(ip,w) \
+        ((w) == XFS_DATA_FORK ? \
+                XFS_IFORK_DSIZE(ip) : \
+                XFS_IFORK_ASIZE(ip))
+#define XFS_IFORK_FORMAT(ip,w) \
+        ((w) == XFS_DATA_FORK ? \
+                (ip)->i_d.di_format : \
+                (ip)->i_d.di_aformat)
+#define XFS_IFORK_FMT_SET(ip,w,n) \
+        ((w) == XFS_DATA_FORK ? \
+                ((ip)->i_d.di_format = (n)) : \
+                ((ip)->i_d.di_aformat = (n)))
+#define XFS_IFORK_NEXTENTS(ip,w) \
+        ((w) == XFS_DATA_FORK ? \
+                (ip)->i_d.di_nextents : \
+                (ip)->i_d.di_anextents)
+#define XFS_IFORK_NEXT_SET(ip,w,n) \
+        ((w) == XFS_DATA_FORK ? \
+                ((ip)->i_d.di_nextents = (n)) : \
+                ((ip)->i_d.di_anextents = (n)))
 
 #ifdef __KERNEL__
 
@@ -503,7 +528,7 @@ void		xfs_dinode_to_disk(struct xfs_dinode_core *,
                                    struct xfs_icdinode *);
 
 uint            xfs_ip2xflags(struct xfs_inode *);
-uint            xfs_dic2xflags(struct xfs_dinode_core *);
+uint            xfs_dic2xflags(struct xfs_dinode *);
 int             xfs_ifree(struct xfs_trans *, xfs_inode_t *,
                            struct xfs_bmap_free *);
 int             xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);