| /* |
| * alloc_tables.c --- Allocate tables for a newly initialized |
| * filesystem. Used by mke2fs when initializing a filesystem |
| * |
| * Copyright (C) 1996 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> |
| #include <unistd.h> |
| #include <stdlib.h> |
| #include <fcntl.h> |
| #include <time.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #if HAVE_ERRNO_H |
| #include <errno.h> |
| #endif |
| |
| #include <linux/ext2_fs.h> |
| |
| #include "ext2fs.h" |
| |
| errcode_t ext2fs_allocate_tables(ext2_filsys fs) |
| { |
| errcode_t retval; |
| blk_t group_blk, start_blk, last_blk, new_blk, blk; |
| int i, j; |
| |
| group_blk = fs->super->s_first_data_block; |
| for (i = 0; i < fs->group_desc_count; i++) { |
| last_blk = group_blk + fs->super->s_blocks_per_group; |
| if (last_blk >= fs->super->s_blocks_count) |
| last_blk = fs->super->s_blocks_count - 1; |
| |
| /* |
| * Allocate the inode table |
| */ |
| start_blk = group_blk + 3 + fs->desc_blocks; |
| retval = ext2fs_get_free_blocks(fs, start_blk, last_blk, |
| fs->inode_blocks_per_group, |
| fs->block_map, &new_blk); |
| if (retval) |
| return retval; |
| for (j=0, blk = new_blk; |
| j < fs->inode_blocks_per_group; |
| j++, blk++) |
| ext2fs_mark_block_bitmap(fs->block_map, blk); |
| fs->group_desc[i].bg_inode_table = new_blk; |
| |
| /* |
| * Allocate the block and inode bitmaps |
| */ |
| start_blk += fs->inode_blocks_per_group + |
| ((2 * i) % (last_blk - start_blk)); |
| retval = ext2fs_get_free_blocks(fs, start_blk, last_blk, |
| 1, fs->block_map, &new_blk); |
| if (retval) |
| return retval; |
| ext2fs_mark_block_bitmap(fs->block_map, new_blk); |
| fs->group_desc[i].bg_block_bitmap = new_blk; |
| |
| retval = ext2fs_get_free_blocks(fs, start_blk, last_blk, |
| 1, fs->block_map, &new_blk); |
| if (retval) |
| return retval; |
| ext2fs_mark_block_bitmap(fs->block_map, new_blk); |
| fs->group_desc[i].bg_inode_bitmap = new_blk; |
| |
| /* |
| * Increment the start of the block group |
| */ |
| group_blk += fs->super->s_blocks_per_group; |
| } |
| return 0; |
| } |
| |