1 files changed, 126 insertions, 0 deletions
diff --git a/lib/ext2fs/newdir.c b/lib/ext2fs/newdir.c
new file mode 100644
index 0000000..7f47285
--- /dev/null
+++ b/lib/ext2fs/newdir.c
@@ -0,0 +1,126 @@
+/*
+ * newdir.c --- create a new directory block
+ *
+ * Copyright (C) 1994, 1995 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>
+#include <string.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include "ext2_fs.h"
+#include "ext2fs.h"
+
+#ifndef EXT2_FT_DIR
+#define EXT2_FT_DIR		2
+#endif
+
+/*
+ * Create new directory block
+ */
+errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino,
+			       ext2_ino_t parent_ino, char **block)
+{
+	struct ext2_dir_entry 	*dir = NULL;
+	errcode_t		retval;
+	char			*buf;
+	int			rec_len;
+	int			filetype = 0;
+	struct ext2_dir_entry_tail	*t;
+	int			csum_size = 0;
+
+	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
+
+	retval = ext2fs_get_mem(fs->blocksize, &buf);
+	if (retval)
+		return retval;
+	memset(buf, 0, fs->blocksize);
+	dir = (struct ext2_dir_entry *) buf;
+
+	if (ext2fs_has_feature_metadata_csum(fs->super))
+		csum_size = sizeof(struct ext2_dir_entry_tail);
+
+	retval = ext2fs_set_rec_len(fs, fs->blocksize - csum_size, dir);
+	if (retval) {
+		ext2fs_free_mem(&buf);
+		return retval;
+	}
+
+	if (dir_ino) {
+		if (ext2fs_has_feature_filetype(fs->super))
+			filetype = EXT2_FT_DIR;
+		/*
+		 * Set up entry for '.'
+		 */
+		dir->inode = dir_ino;
+		ext2fs_dirent_set_name_len(dir, 1);
+		ext2fs_dirent_set_file_type(dir, filetype);
+		dir->name[0] = '.';
+		rec_len = (fs->blocksize - csum_size) - EXT2_DIR_REC_LEN(1);
+		dir->rec_len = EXT2_DIR_REC_LEN(1);
+
+		/*
+		 * Set up entry for '..'
+		 */
+		dir = (struct ext2_dir_entry *) (buf + dir->rec_len);
+		retval = ext2fs_set_rec_len(fs, rec_len, dir);
+		if (retval) {
+			ext2fs_free_mem(&buf);
+			return retval;
+		}
+		dir->inode = parent_ino;
+		ext2fs_dirent_set_name_len(dir, 2);
+		ext2fs_dirent_set_file_type(dir, filetype);
+		dir->name[0] = '.';
+		dir->name[1] = '.';
+
+	}
+
+	if (csum_size) {
+		t = EXT2_DIRENT_TAIL(buf, fs->blocksize);
+		ext2fs_initialize_dirent_tail(fs, t);
+	}
+	*block = buf;
+	return 0;
+}
+
+/*
+ * Create new directory on inline data
+ */
+errcode_t ext2fs_new_dir_inline_data(ext2_filsys fs,
+				     ext2_ino_t dir_ino EXT2FS_ATTR((unused)),
+				     ext2_ino_t parent_ino, __u32 *iblock)
+{
+	struct ext2_dir_entry 	*dir = NULL;
+	errcode_t		retval;
+	int			rec_len;
+
+	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
+
+	iblock[0] = ext2fs_cpu_to_le32(parent_ino);
+
+	dir = (struct ext2_dir_entry *)((char *)iblock +
+					EXT4_INLINE_DATA_DOTDOT_SIZE);
+	dir->inode = 0;
+	rec_len = EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DATA_DOTDOT_SIZE;
+	retval = ext2fs_set_rec_len(fs, rec_len, dir);
+	if (retval)
+		goto errout;
+
+#ifdef WORDS_BIGENDIAN
+	retval = ext2fs_dirent_swab_out2(fs, (char *)dir, rec_len, 0);
+	if (retval)
+		goto errout;
+#endif
+
+errout:
+	return retval;
+}