Index: linux-2.6.7/include/linux/dcache.h
===================================================================
--- linux-2.6.7.orig/include/linux/dcache.h	2004-08-30 17:20:57.000000000 +0800
+++ linux-2.6.7/include/linux/dcache.h	2004-08-30 17:39:12.000000000 +0800
@@ -94,6 +94,9 @@
 	spinlock_t d_lock;		/* per dentry lock */
 	struct inode *d_inode;		/* Where the name belongs to - NULL is
 					 * negative */
+        unsigned d_inum;                /* for cross-fs references (Lustre) */
+        unsigned d_mdsnum;              /* for cross-fs references (Lustre) */
+        unsigned d_generation;          /* for cross-fs references (Lustre) */
 	/*
 	 * The next three fields are touched by __d_lookup.  Place them here
 	 * so they all fit in a 16-byte range, with 16-byte alignment.
@@ -166,6 +169,7 @@
 #define DCACHE_UNHASHED		0x0010	
 #define DCACHE_LUSTRE_INVALID     0x0020  /* Lustre invalidated */
 
+#define DCACHE_CROSS_REF       0x0040  /* entry points to inode on another MDS */
 
 extern spinlock_t dcache_lock;