59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* 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;
|
|
}
|