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-rw-r--r--fs/xfs/xfs_rw.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/fs/xfs/xfs_rw.c b/fs/xfs/xfs_rw.c
index 6fa10897d41..4c199d18f85 100644
--- a/fs/xfs/xfs_rw.c
+++ b/fs/xfs/xfs_rw.c
@@ -336,3 +336,25 @@ xfs_bwrite(
}
return (error);
}
+
+/*
+ * helper function to extract extent size hint from inode
+ */
+xfs_extlen_t
+xfs_get_extsz_hint(
+ struct xfs_inode *ip)
+{
+ xfs_extlen_t extsz;
+
+ if (unlikely(XFS_IS_REALTIME_INODE(ip))) {
+ 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;
+}