1 files changed, 68 insertions, 0 deletions
diff --git a/fs/freevxfs/vxfs_dir.h b/fs/freevxfs/vxfs_dir.h
new file mode 100644
index 000000000..fbcd60336
--- /dev/null
+++ b/fs/freevxfs/vxfs_dir.h
@@ -0,0 +1,68 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2000-2001 Christoph Hellwig.
+ */
+#ifndef _VXFS_DIR_H_
+#define _VXFS_DIR_H_
+
+/*
+ * Veritas filesystem driver - directory structure.
+ *
+ * This file contains the definition of the vxfs directory format.
+ */
+
+
+/*
+ * VxFS directory block header.
+ *
+ * This entry is the head of every filesystem block in a directory.
+ * It is used for free space management and additionally includes
+ * a hash for speeding up directory search (lookup).
+ *
+ * The hash may be empty and in fact we do not use it all in the
+ * Linux driver for now.
+ */
+struct vxfs_dirblk {
+	__fs16		d_free;		/* free space in dirblock */
+	__fs16		d_nhash;	/* no of hash chains */
+	__fs16		d_hash[1];	/* hash chain */
+};
+
+/*
+ * VXFS_NAMELEN is the maximum length of the d_name field
+ *	of an VxFS directory entry.
+ */
+#define VXFS_NAMELEN	256
+
+/*
+ * VxFS directory entry.
+ */
+struct vxfs_direct {
+	__fs32		d_ino;			/* inode number */
+	__fs16		d_reclen;		/* record length */
+	__fs16		d_namelen;		/* d_name length */
+	__fs16		d_hashnext;		/* next hash entry */
+	char		d_name[VXFS_NAMELEN];	/* name */
+};
+
+/*
+ * VXFS_DIRPAD defines the directory entry boundaries, is _must_ be
+ *	a multiple of four.
+ * VXFS_NAMEMIN is the length of a directory entry with a NULL d_name.
+ * VXFS_DIRROUND is an internal macros that rounds a length to a value
+ *	usable for directory sizes.
+ * VXFS_DIRLEN calculates the directory entry size for an entry with
+ *	a d_name with size len.
+ */
+#define VXFS_DIRPAD		4
+#define VXFS_NAMEMIN		offsetof(struct vxfs_direct, d_name)
+#define VXFS_DIRROUND(len)	((VXFS_DIRPAD + (len) - 1) & ~(VXFS_DIRPAD -1))
+#define VXFS_DIRLEN(len)	(VXFS_DIRROUND(VXFS_NAMEMIN + (len)))
+
+/*
+ * VXFS_DIRBLKOV is the overhead of a specific dirblock.
+ */
+#define VXFS_DIRBLKOV(sbi, dbp)	\
+	((sizeof(short) * fs16_to_cpu(sbi, dbp->d_nhash)) + 4)
+
+#endif /* _VXFS_DIR_H_ */