1 files changed, 14 insertions, 0 deletions

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index f64b482a7953..c6fb5f0577b8 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -61,6 +61,20 @@ STATIC int xfs_iformat_local(xfs_inode_t *, xfs_dinode_t *, int, int);
 STATIC int xfs_iformat_extents(xfs_inode_t *, xfs_dinode_t *, int);
 STATIC int xfs_iformat_btree(xfs_inode_t *, xfs_dinode_t *, int);
 
+/*
+ * helper function to extract extent size hint from inode
+ */
+xfs_extlen_t
+xfs_get_extsz_hint(
+        struct xfs_inode        *ip)
+{
+        if ((ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE) && ip->i_d.di_extsize)
+                return ip->i_d.di_extsize;
+        if (XFS_IS_REALTIME_INODE(ip))
+                return ip->i_mount->m_sb.sb_rextsize;
+        return 0;
+}
+
 #ifdef DEBUG
 /*
  * Make sure that the extents in the given memory buffer