1 files changed, 23 insertions, 0 deletions

diff --git a/fs/xfs/xfs_da_btree.h b/fs/xfs/xfs_da_btree.h
index ee5170c46ae1..0854b95b1dc1 100644
--- a/fs/xfs/xfs_da_btree.h
+++ b/fs/xfs/xfs_da_btree.h
@@ -47,6 +47,29 @@ typedef struct xfs_da_blkinfo {
 } xfs_da_blkinfo_t;
 
 /*
+ * CRC enabled directory structure types
+ *
+ * The headers change size for the additional verification information, but
+ * otherwise the tree layouts and contents are unchanged.
+ */
+#define XFS_DIR3_LEAF1_MAGIC    0x3df1  /* magic number: v2 dirlf single blks */
+#define XFS_DIR3_LEAFN_MAGIC    0x3dff  /* magic number: v2 dirlf multi blks */
+
+struct xfs_da3_blkinfo {
+        /*
+         * the node link manipulation code relies on the fact that the first
+         * element of this structure is the struct xfs_da_blkinfo so it can
+         * ignore the differences in the rest of the structures.
+         */
+        struct xfs_da_blkinfo   hdr;
+        __be32                  crc;    /* CRC of block */
+        __be64                  blkno;  /* first block of the buffer */
+        __be64                  lsn;    /* sequence number of last write */
+        uuid_t                  uuid;   /* filesystem we belong to */
+        __be64                  owner;  /* inode that owns the block */
+};
+
+/*
  * This is the structure of the root and intermediate nodes in the Btree.
  * The leaf nodes are defined above.
  *