/* 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; }