Non-GPLd ext2fs code from Manuel, unmodified.

1 files changed, 114 insertions, 0 deletions

diff --git a/sys/ufs/ext2fs/ext2fs_dir.h b/sys/ufs/ext2fs/ext2fs_dir.h
new file mode 100644
index 00000000000..341dd5ca21d
--- /dev/null
+++ b/sys/ufs/ext2fs/ext2fs_dir.h
@@ -0,0 +1,114 @@
+/*	$NetBSD: dir.h,v 1.8 1996/03/09 19:42:41 scottr Exp $	*/
+
+/* Modified for EXT2FS on NetBSD by Manuel Bouyer, April 1997 */
+
+/*
+ * Copyright (c) 1982, 1986, 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ * (c) UNIX System Laboratories, Inc.
+ * All or some portions of this file are derived from material licensed
+ * to the University of California by American Telephone and Telegraph
+ * Co. or Unix System Laboratories, Inc. and are reproduced herein with
+ * the permission of UNIX System Laboratories, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)dir.h	8.4 (Berkeley) 8/10/94
+ */
+
+#ifndef _EXT2FS_DIR_H_
+#define	_EXT2FS_DIR_H_
+
+/*
+ * Theoretically, directories can be more than 2Gb in length, however, in
+ * practice this seems unlikely. So, we define the type doff_t as a 32-bit
+ * quantity to keep down the cost of doing lookup on a 32-bit machine.
+*/
+#define	doff_t		int32_t
+#define	EXT2FS_MAXDIRSIZE	(0x7fffffff)
+
+/*
+ * A directory consists of some number of blocks of e2fs_bsize bytes.
+ *
+ * Each block contains some number of directory entry
+ * structures, which are of variable length.  Each directory entry has
+ * a struct direct at the front of it, containing its inode number,
+ * the length of the entry, and the length of the name contained in
+ * the entry.  These are followed by the name padded to a 4 byte boundary
+ * with null bytes.  All names are guaranteed null terminated.
+ * The maximum length of a name in a directory is EXT2FS_MAXNAMLEN.
+ *
+ * The macro EXT2FS_DIRSIZ(fmt, dp) gives the amount of space required to
+ * represent a directory entry.  Free space in a directory is represented by
+ * entries which have dp->e2d_reclen > DIRSIZ(fmt, dp).  All d2fs_bsize bytes
+ * in a directory block are claimed by the directory entries.  This
+ * usually results in the last entry in a directory having a large
+ * dp->e2d_reclen.  When entries are deleted from a directory, the
+ * space is returned to the previous entry in the same directory
+ * block by increasing its dp->e2d_reclen.  If the first entry of
+ * a directory block is free, then its dp->e2d_ino is set to 0.
+ * Entries other than the first in a directory do not normally have
+ * dp->e2d_ino set to 0.
+ */
+
+#define	EXT2FS_MAXNAMLEN	255
+
+struct	ext2fs_direct {
+	u_int32_t e2d_ino;		/* inode number of entry */
+	u_int16_t e2d_reclen;		/* length of this record */
+	u_int16_t e2d_namlen;		/* length of string in d_name */
+	char	  e2d_name[EXT2FS_MAXNAMLEN];/* name with length <= EXT2FS_MAXNAMLEN */
+};
+
+/*
+ * The EXT2FS_DIRSIZ macro gives the minimum record length which will hold
+ * the directory entryfor a name len "len" (without the terminating null byte).
+ * This requires the amount of space in struct direct
+ * without the d_name field, plus enough space for the name without a
+ * terminating null byte, rounded up to a 4 byte boundary.
+ */
+#define EXT2FS_DIRSIZ(len) \
+    (( 8 + len + 3) &~ 3)
+
+/*
+ * Template for manipulating directories.  Should use struct direct's,
+ * but the name field is EXT2FS_MAXNAMLEN - 1, and this just won't do.
+ */
+struct ext2fs_dirtemplate {
+	u_int32_t	dot_ino;
+	int16_t		dot_reclen;
+	u_int16_t	dot_namlen;
+	char		dot_name[4];	/* must be multiple of 4 */
+	u_int32_t	dotdot_ino;
+	int16_t		dotdot_reclen;
+	u_int16_t	dotdot_namlen;
+	char		dotdot_name[4];	/* ditto */
+};
+
+#endif /* !_EXT2FS_DIR_H_ */