Last change
on this file since 3245 was 1765, checked in by Bruno Cornec, 17 years ago |
Update to busybox 1.7.2
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-
Property svn:eol-style
set to
native
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File size:
1.4 KB
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[1765] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * alloc_sb.c --- Allocate the superblock and block group descriptors for a
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| 4 | * newly initialized filesystem. Used by mke2fs when initializing a filesystem
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| 5 | *
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| 6 | * Copyright (C) 1994, 1995, 1996, 2003 Theodore Ts'o.
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| 7 | *
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| 8 | * %Begin-Header%
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| 9 | * This file may be redistributed under the terms of the GNU Public
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| 10 | * License.
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| 11 | * %End-Header%
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| 12 | */
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| 13 |
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| 14 | #include <stdio.h>
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| 15 | #include <string.h>
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| 16 | #if HAVE_UNISTD_H
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| 17 | #include <unistd.h>
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| 18 | #endif
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| 19 | #include <fcntl.h>
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| 20 | #include <time.h>
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| 21 | #if HAVE_SYS_STAT_H
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| 22 | #include <sys/stat.h>
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| 23 | #endif
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| 24 | #if HAVE_SYS_TYPES_H
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| 25 | #include <sys/types.h>
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| 26 | #endif
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| 27 |
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| 28 | #include "ext2_fs.h"
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| 29 | #include "ext2fs.h"
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| 30 |
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| 31 | int ext2fs_reserve_super_and_bgd(ext2_filsys fs,
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| 32 | dgrp_t group,
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| 33 | ext2fs_block_bitmap bmap)
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| 34 | {
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| 35 | blk_t super_blk, old_desc_blk, new_desc_blk;
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| 36 | int j, old_desc_blocks, num_blocks;
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| 37 |
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| 38 | num_blocks = ext2fs_super_and_bgd_loc(fs, group, &super_blk,
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| 39 | &old_desc_blk, &new_desc_blk, 0);
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| 40 |
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| 41 | if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
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| 42 | old_desc_blocks = fs->super->s_first_meta_bg;
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| 43 | else
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| 44 | old_desc_blocks =
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| 45 | fs->desc_blocks + fs->super->s_reserved_gdt_blocks;
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| 46 |
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| 47 | if (super_blk || (group == 0))
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| 48 | ext2fs_mark_block_bitmap(bmap, super_blk);
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| 49 |
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| 50 | if (old_desc_blk) {
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| 51 | for (j=0; j < old_desc_blocks; j++)
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| 52 | ext2fs_mark_block_bitmap(bmap, old_desc_blk + j);
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| 53 | }
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| 54 | if (new_desc_blk)
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| 55 | ext2fs_mark_block_bitmap(bmap, new_desc_blk);
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| 56 |
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| 57 | return num_blocks;
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| 58 | }
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