1 files changed, 113 insertions, 0 deletions
diff --git a/lib/ext2fs/dirblock.c b/lib/ext2fs/dirblock.c
new file mode 100644
index 0000000..54b2777
--- /dev/null
+++ b/lib/ext2fs/dirblock.c
@@ -0,0 +1,113 @@
+/*
+ * dirblock.c --- directory block routines.
+ *
+ * Copyright (C) 1995, 1996 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
+ * %End-Header%
+ */
+
+#include "config.h"
+#include <stdio.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <string.h>
+#include <time.h>
+
+#include "ext2_fs.h"
+#include "ext2fs.h"
+
+errcode_t ext2fs_read_dir_block4(ext2_filsys fs, blk64_t block,
+				 void *buf, int flags EXT2FS_ATTR((unused)),
+				 ext2_ino_t ino)
+{
+	errcode_t	retval;
+	int		corrupt = 0;
+
+	retval = io_channel_read_blk64(fs->io, block, 1, buf);
+	if (retval)
+		return retval;
+
+	if (!(fs->flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) &&
+	    !ext2fs_dir_block_csum_verify(fs, ino,
+					  (struct ext2_dir_entry *)buf))
+		corrupt = 1;
+
+#ifdef WORDS_BIGENDIAN
+	retval = ext2fs_dirent_swab_in(fs, buf, flags);
+#endif
+	if (!retval && corrupt)
+		retval = EXT2_ET_DIR_CSUM_INVALID;
+	return retval;
+}
+
+errcode_t ext2fs_read_dir_block3(ext2_filsys fs, blk64_t block,
+				 void *buf, int flags EXT2FS_ATTR((unused)))
+{
+	return ext2fs_read_dir_block4(fs, block, buf, flags, 0);
+}
+
+errcode_t ext2fs_read_dir_block2(ext2_filsys fs, blk_t block,
+				 void *buf, int flags EXT2FS_ATTR((unused)))
+{
+	return ext2fs_read_dir_block3(fs, block, buf, flags);
+}
+
+errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block,
+				 void *buf)
+{
+	return ext2fs_read_dir_block3(fs, block, buf, 0);
+}
+
+
+errcode_t ext2fs_write_dir_block4(ext2_filsys fs, blk64_t block,
+				  void *inbuf, int flags EXT2FS_ATTR((unused)),
+				  ext2_ino_t ino)
+{
+	errcode_t	retval;
+	char		*buf = inbuf;
+
+#ifdef WORDS_BIGENDIAN
+	retval = ext2fs_get_mem(fs->blocksize, &buf);
+	if (retval)
+		return retval;
+	memcpy(buf, inbuf, fs->blocksize);
+	retval = ext2fs_dirent_swab_out(fs, buf, flags);
+	if (retval)
+		return retval;
+#endif
+	retval = ext2fs_dir_block_csum_set(fs, ino,
+					   (struct ext2_dir_entry *)buf);
+	if (retval)
+		goto out;
+
+	retval = io_channel_write_blk64(fs->io, block, 1, buf);
+
+out:
+#ifdef WORDS_BIGENDIAN
+	ext2fs_free_mem(&buf);
+#endif
+	return retval;
+}
+
+errcode_t ext2fs_write_dir_block3(ext2_filsys fs, blk64_t block,
+				  void *inbuf, int flags EXT2FS_ATTR((unused)))
+{
+	return ext2fs_write_dir_block4(fs, block, inbuf, flags, 0);
+}
+
+errcode_t ext2fs_write_dir_block2(ext2_filsys fs, blk_t block,
+				 void *inbuf, int flags EXT2FS_ATTR((unused)))
+{
+	return ext2fs_write_dir_block3(fs, block, inbuf, flags);
+}
+
+errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block,
+				 void *inbuf)
+{
+	return ext2fs_write_dir_block3(fs, block, inbuf, 0);
+}
+