* Copyright (C) 1996 Theodore Ts'o.
*
* %Begin-Header%
- * This file may be redistributed under the terms of the GNU Public
- * License.
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
* %End-Header%
*/
+#include "config.h"
#include <stdio.h>
#include <string.h>
#if HAVE_UNISTD_H
* block number with a correct offset were the bitmaps and inode
* tables can be allocated continously and in order.
*/
-static blk_t flexbg_offset(ext2_filsys fs, dgrp_t group, blk64_t start_blk,
- ext2fs_block_bitmap bmap, int offset, int size,
- int elem_size)
+static blk64_t flexbg_offset(ext2_filsys fs, dgrp_t group, blk64_t start_blk,
+ ext2fs_block_bitmap bmap, int rem_grp,
+ int elem_size)
{
- int flexbg, flexbg_size;
- blk_t last_blk, first_free = 0;
+ int flexbg, flexbg_size, size;
+ blk64_t last_blk, first_free = 0;
dgrp_t last_grp;
flexbg_size = 1 << fs->super->s_log_groups_per_flex;
flexbg = group / flexbg_size;
+ size = rem_grp * elem_size;
if (size > (int) (fs->super->s_blocks_per_group / 8))
size = (int) fs->super->s_blocks_per_group / 8;
- if (offset)
- offset -= 1;
-
/*
* Don't do a long search if the previous block
* search is still valid.
*/
- if (start_blk && group % flexbg_size) {
- if (ext2fs_test_block_bitmap_range2(bmap, start_blk + elem_size,
- size))
- return start_blk + elem_size;
- }
+ if (start_blk && ext2fs_test_block_bitmap_range2(bmap, start_blk,
+ elem_size))
+ return start_blk;
- start_blk = ext2fs_group_first_block(fs, flexbg_size * flexbg);
+ start_blk = ext2fs_group_first_block2(fs, flexbg_size * flexbg);
last_grp = group | (flexbg_size - 1);
- if (last_grp > fs->group_desc_count)
- last_grp = fs->group_desc_count;
- last_blk = ext2fs_group_last_block(fs, last_grp);
+ if (last_grp > fs->group_desc_count-1)
+ last_grp = fs->group_desc_count-1;
+ last_blk = ext2fs_group_last_block2(fs, last_grp);
/* Find the first available block */
- if (ext2fs_get_free_blocks(fs, start_blk, last_blk, 1, bmap,
- &first_free))
+ if (ext2fs_get_free_blocks2(fs, start_blk, last_blk, size,
+ bmap, &first_free) == 0)
return first_free;
- if (ext2fs_get_free_blocks(fs, first_free + offset, last_blk, size,
- bmap, &first_free))
+ if (ext2fs_get_free_blocks2(fs, start_blk, last_blk, elem_size,
+ bmap, &first_free) == 0)
+ return first_free;
+
+ if (ext2fs_get_free_blocks2(fs, 0, last_blk, elem_size, bmap,
+ &first_free) == 0)
return first_free;
return first_free;
errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group,
ext2fs_block_bitmap bmap)
{
+ unsigned int j;
errcode_t retval;
- blk_t group_blk, start_blk, last_blk, new_blk, blk;
+ blk64_t group_blk, start_blk, last_blk, new_blk, blk;
dgrp_t last_grp = 0;
- int j, rem_grps = 0, flexbg_size = 0;
+ int rem_grps = 0, flexbg_size = 0;
- group_blk = ext2fs_group_first_block(fs, group);
- last_blk = ext2fs_group_last_block(fs, group);
+ group_blk = ext2fs_group_first_block2(fs, group);
+ last_blk = ext2fs_group_last_block2(fs, group);
if (!bmap)
bmap = fs->block_map;
fs->super->s_log_groups_per_flex) {
flexbg_size = 1 << fs->super->s_log_groups_per_flex;
last_grp = group | (flexbg_size - 1);
- rem_grps = last_grp - group;
- if (last_grp > fs->group_desc_count)
- last_grp = fs->group_desc_count;
+ if (last_grp > fs->group_desc_count-1)
+ last_grp = fs->group_desc_count-1;
+ rem_grps = last_grp - group + 1;
}
/*
* Allocate the block and inode bitmaps, if necessary
*/
if (fs->stride) {
- retval = ext2fs_get_free_blocks(fs, group_blk, last_blk,
- 1, bmap, &start_blk);
+ retval = ext2fs_get_free_blocks2(fs, group_blk, last_blk,
+ 1, bmap, &start_blk);
if (retval)
return retval;
start_blk += fs->inode_blocks_per_group;
if (flexbg_size) {
blk64_t prev_block = 0;
- if (group && fs->group_desc[group-1].bg_block_bitmap)
- prev_block = fs->group_desc[group-1].bg_block_bitmap;
+ if (group % flexbg_size)
+ prev_block = ext2fs_block_bitmap_loc(fs, group - 1) + 1;
start_blk = flexbg_offset(fs, group, prev_block, bmap,
- 0, rem_grps, 1);
- last_blk = ext2fs_group_last_block(fs, last_grp);
+ rem_grps, 1);
+ last_blk = ext2fs_group_last_block2(fs, last_grp);
}
- if (!fs->group_desc[group].bg_block_bitmap) {
- retval = ext2fs_get_free_blocks(fs, start_blk, last_blk,
- 1, bmap, &new_blk);
+ if (!ext2fs_block_bitmap_loc(fs, group)) {
+ retval = ext2fs_get_free_blocks2(fs, start_blk, last_blk,
+ 1, bmap, &new_blk);
if (retval == EXT2_ET_BLOCK_ALLOC_FAIL)
- retval = ext2fs_get_free_blocks(fs, group_blk,
+ retval = ext2fs_get_free_blocks2(fs, group_blk,
last_blk, 1, bmap, &new_blk);
if (retval)
return retval;
ext2fs_mark_block_bitmap2(bmap, new_blk);
- fs->group_desc[group].bg_block_bitmap = new_blk;
+ ext2fs_block_bitmap_loc_set(fs, group, new_blk);
if (flexbg_size) {
- dgrp_t gr = ext2fs_group_of_blk(fs, new_blk);
- fs->group_desc[gr].bg_free_blocks_count--;
- fs->super->s_free_blocks_count--;
- ext2fs_bg_flag_clear(fs, gr, EXT2_BG_BLOCK_UNINIT);
+ dgrp_t gr = ext2fs_group_of_blk2(fs, new_blk);
+ ext2fs_bg_free_blocks_count_set(fs, gr, ext2fs_bg_free_blocks_count(fs, gr) - 1);
+ ext2fs_free_blocks_count_add(fs->super, -1);
+ ext2fs_bg_flags_clear(fs, gr, EXT2_BG_BLOCK_UNINIT);
ext2fs_group_desc_csum_set(fs, gr);
}
}
if (flexbg_size) {
- blk_t prev_block = 0;
- if (group && fs->group_desc[group-1].bg_inode_bitmap)
- prev_block = fs->group_desc[group-1].bg_inode_bitmap;
+ blk64_t prev_block = 0;
+ if (group % flexbg_size)
+ prev_block = ext2fs_inode_bitmap_loc(fs, group - 1) + 1;
+ else
+ prev_block = ext2fs_block_bitmap_loc(fs, group) +
+ flexbg_size;
start_blk = flexbg_offset(fs, group, prev_block, bmap,
- flexbg_size, rem_grps, 1);
- last_blk = ext2fs_group_last_block(fs, last_grp);
+ rem_grps, 1);
+ last_blk = ext2fs_group_last_block2(fs, last_grp);
}
- if (!fs->group_desc[group].bg_inode_bitmap) {
- retval = ext2fs_get_free_blocks(fs, start_blk, last_blk,
- 1, bmap, &new_blk);
+ if (!ext2fs_inode_bitmap_loc(fs, group)) {
+ retval = ext2fs_get_free_blocks2(fs, start_blk, last_blk,
+ 1, bmap, &new_blk);
if (retval == EXT2_ET_BLOCK_ALLOC_FAIL)
- retval = ext2fs_get_free_blocks(fs, group_blk,
- last_blk, 1, bmap, &new_blk);
+ retval = ext2fs_get_free_blocks2(fs, group_blk,
+ last_blk, 1, bmap, &new_blk);
if (retval)
return retval;
ext2fs_mark_block_bitmap2(bmap, new_blk);
- fs->group_desc[group].bg_inode_bitmap = new_blk;
+ ext2fs_inode_bitmap_loc_set(fs, group, new_blk);
if (flexbg_size) {
- dgrp_t gr = ext2fs_group_of_blk(fs, new_blk);
- fs->group_desc[gr].bg_free_blocks_count--;
- fs->super->s_free_blocks_count--;
- ext2fs_bg_flag_clear(fs, gr, EXT2_BG_BLOCK_UNINIT);
+ dgrp_t gr = ext2fs_group_of_blk2(fs, new_blk);
+ ext2fs_bg_free_blocks_count_set(fs, gr, ext2fs_bg_free_blocks_count(fs, gr) - 1);
+ ext2fs_free_blocks_count_add(fs->super, -1);
+ ext2fs_bg_flags_clear(fs, gr, EXT2_BG_BLOCK_UNINIT);
ext2fs_group_desc_csum_set(fs, gr);
}
}
* Allocate the inode table
*/
if (flexbg_size) {
- blk_t prev_block = 0;
- if (group && fs->group_desc[group-1].bg_inode_table)
- prev_block = fs->group_desc[group-1].bg_inode_table;
+ blk64_t prev_block = 0;
+
+ if (group % flexbg_size)
+ prev_block = ext2fs_inode_table_loc(fs, group - 1) +
+ fs->inode_blocks_per_group;
+ else
+ prev_block = ext2fs_inode_bitmap_loc(fs, group) +
+ flexbg_size;
+
group_blk = flexbg_offset(fs, group, prev_block, bmap,
- flexbg_size * 2,
- fs->inode_blocks_per_group *
- rem_grps,
- fs->inode_blocks_per_group);
- last_blk = ext2fs_group_last_block(fs, last_grp);
+ rem_grps, fs->inode_blocks_per_group);
+ last_blk = ext2fs_group_last_block2(fs, last_grp);
}
- if (!fs->group_desc[group].bg_inode_table) {
- retval = ext2fs_get_free_blocks(fs, group_blk, last_blk,
+ if (!ext2fs_inode_table_loc(fs, group)) {
+ retval = ext2fs_get_free_blocks2(fs, group_blk, last_blk,
fs->inode_blocks_per_group,
bmap, &new_blk);
if (retval)
j++, blk++) {
ext2fs_mark_block_bitmap2(bmap, blk);
if (flexbg_size) {
- dgrp_t gr = ext2fs_group_of_blk(fs, blk);
- fs->group_desc[gr].bg_free_blocks_count--;
- fs->super->s_free_blocks_count--;
- ext2fs_bg_flag_clear(fs, gr,
+ dgrp_t gr = ext2fs_group_of_blk2(fs, blk);
+ ext2fs_bg_free_blocks_count_set(fs, gr, ext2fs_bg_free_blocks_count(fs, gr) - 1);
+ ext2fs_free_blocks_count_add(fs->super, -1);
+ ext2fs_bg_flags_clear(fs, gr,
EXT2_BG_BLOCK_UNINIT);
ext2fs_group_desc_csum_set(fs, gr);
}
}
- fs->group_desc[group].bg_inode_table = new_blk;
+ ext2fs_inode_table_loc_set(fs, group, new_blk);
}
ext2fs_group_desc_csum_set(fs, group);
return 0;