import ext2fs lib to prep for new e2fsprogs

1 files changed, 57 insertions, 0 deletions

diff --git a/e2fsprogs/ext2fs/alloc_sb.c b/e2fsprogs/ext2fs/alloc_sb.c
new file mode 100644
index 000000000..ef40b938f
--- /dev/null
+++ b/e2fsprogs/ext2fs/alloc_sb.c
@@ -0,0 +1,57 @@
+/*
+ * alloc_sb.c --- Allocate the superblock and block group descriptors for a 
+ * newly initialized filesystem.  Used by mke2fs when initializing a filesystem
+ *
+ * Copyright (C) 1994, 1995, 1996, 2003 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+#include <stdio.h>
+#include <string.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <fcntl.h>
+#include <time.h>
+#if HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#include "ext2_fs.h"
+#include "ext2fs.h"
+
+int ext2fs_reserve_super_and_bgd(ext2_filsys fs, 
+				 dgrp_t group,
+				 ext2fs_block_bitmap bmap)
+{
+	blk_t	super_blk, old_desc_blk, new_desc_blk;
+	int	j, old_desc_blocks, num_blocks;
+
+	num_blocks = ext2fs_super_and_bgd_loc(fs, group, &super_blk, 
+					      &old_desc_blk, &new_desc_blk, 0);
+
+	if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
+		old_desc_blocks = fs->super->s_first_meta_bg;
+	else
+		old_desc_blocks = 
+			fs->desc_blocks + fs->super->s_reserved_gdt_blocks;
+
+	if (super_blk || (group == 0))
+		ext2fs_mark_block_bitmap(bmap, super_blk);
+
+	if (old_desc_blk) {
+		for (j=0; j < old_desc_blocks; j++)
+			ext2fs_mark_block_bitmap(bmap, old_desc_blk + j);
+	}
+	if (new_desc_blk)
+		ext2fs_mark_block_bitmap(bmap, new_desc_blk);
+
+	return num_blocks;
+}