hfs: handle more on-disk corruptions without oopsing

[firefly-linux-kernel-4.4.55.git] / fs / hfs / hfs.h

diff --git a/fs/hfs/hfs.h b/fs/hfs/hfs.h
index 1445e3a56ed45695428a1633a344c2f5f6462d1b..c6aae61adfe6f098f9c0fc260b1090b1331d29d9 100644 (file)
--- a/fs/hfs/hfs.h
+++ b/fs/hfs/hfs.h
@@ -28,6 +28,8 @@
 #define HFS_MAX_NAMELEN                128
 #define HFS_MAX_VALENCE                32767U
 
+#define HFS_BAD_KEYLEN         0xFF
+
 /* Meanings of the drAtrb field of the MDB,
  * Reference: _Inside Macintosh: Files_ p. 2-61
  */
@@ -167,6 +169,9 @@ typedef union hfs_btree_key {
        struct hfs_ext_key ext;
 } hfs_btree_key;
 
+#define HFS_MAX_CAT_KEYLEN     (sizeof(struct hfs_cat_key) - sizeof(u8))
+#define HFS_MAX_EXT_KEYLEN     (sizeof(struct hfs_ext_key) - sizeof(u8))
+
 typedef union hfs_btree_key btree_key;
 
 struct hfs_extent {