[XFS] Cleanup inode extent size hint extraction
SGI-PV: 966004
SGI-Modid: xfs-linux-melb:xfs-kern:28866a
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tim Shimmin <tes@sgi.com>
diff --git a/fs/xfs/xfs_rw.h b/fs/xfs/xfs_rw.h
index ba74000..fcf28db 100644
--- a/fs/xfs/xfs_rw.h
+++ b/fs/xfs/xfs_rw.h
@@ -77,6 +77,28 @@
#define XFS_FREE_EOF_LOCK (1<<0)
#define XFS_FREE_EOF_NOLOCK (1<<1)
+
+/*
+ * helper function to extract extent size hint from inode
+ */
+STATIC_INLINE xfs_extlen_t
+xfs_get_extsz_hint(
+ xfs_inode_t *ip)
+{
+ xfs_extlen_t extsz;
+
+ if (unlikely(ip->i_d.di_flags & XFS_DIFLAG_REALTIME)) {
+ extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE)
+ ? ip->i_d.di_extsize
+ : ip->i_mount->m_sb.sb_rextsize;
+ ASSERT(extsz);
+ } else {
+ extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE)
+ ? ip->i_d.di_extsize : 0;
+ }
+ return extsz;
+}
+
/*
* Prototypes for functions in xfs_rw.c.
*/