new EFS headers (Al Smith rocks my world)

1 files changed, 41 insertions, 0 deletions

diff --git a/include/linux/efs_dir.h b/include/linux/efs_dir.h
new file mode 100644
index 000000000..3459bd4bf
--- /dev/null
+++ b/include/linux/efs_dir.h
@@ -0,0 +1,41 @@
+/*
+ * efs_dir.h
+ *
+ * Copyright (c) 1999 Al Smith
+ */
+
+#ifndef __EFS_DIR_H__
+#define __EFS_DIR_H__
+
+#define EFS_DIRBSIZE	EFS_BLOCKSIZE
+
+struct efs_dentry {
+	unsigned int	inode;
+	unsigned char	namelen;
+	char		name[3];
+};
+
+#define EFS_DENTSIZE	(sizeof(struct efs_dentry) - 3 + 1)
+#define EFS_MAXNAMELEN  ((1 << (sizeof(char) * 8)) - 1)
+
+#define EFS_DIRBLK_HEADERSIZE	4
+#define EFS_DIRBLK_MAGIC	0xbeef	/* moo */
+
+struct efs_dir {
+	unsigned short	magic;
+	unsigned char	firstused;
+	unsigned char	slots;
+
+	unsigned char	space[EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE];
+};
+
+#define EFS_MAXENTS \
+	((EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE) / \
+	 (EFS_DENTSIZE + sizeof(char)))
+
+#define EFS_SLOTAT(dir, slot) EFS_REALOFF((dir)->space[slot])
+
+#define EFS_REALOFF(offset) ((offset << 1))
+
+#endif /* __EFS_DIR_H__ */
+