* 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
#include <unistd.h>
-#include <stdlib.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>
-#if HAVE_ERRNO_H
-#include <errno.h>
#endif
-#include <linux/ext2_fs.h>
-
+#include "ext2_fs.h"
#include "ext2fs.h"
+#include "ext2fsP.h"
-errcode_t ext2fs_allocate_tables(ext2_filsys fs)
+/*
+ * This routine searches for free blocks that can allocate a full
+ * group of bitmaps or inode tables for a flexbg group. Returns the
+ * block number with a correct offset were the bitmaps and inode
+ * tables can be allocated continously and in order.
+ */
+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, 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;
+
+ /*
+ * Don't do a long search if the previous block
+ * search is still valid.
+ */
+ if (start_blk && ext2fs_test_block_bitmap_range2(bmap, start_blk,
+ elem_size))
+ return start_blk;
+
+ start_blk = ext2fs_group_first_block2(fs, flexbg_size * flexbg);
+ last_grp = group | (flexbg_size - 1);
+ 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_blocks2(fs, start_blk, last_blk, size,
+ bmap, &first_free) == 0)
+ return 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;
- int i, j;
+ blk64_t group_blk, start_blk, last_blk, new_blk, blk;
+ dgrp_t last_grp = 0;
+ int rem_grps = 0, flexbg_size = 0;
- 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);
+ group_blk = ext2fs_group_first_block2(fs, group);
+ last_blk = ext2fs_group_last_block2(fs, group);
+
+ if (!bmap)
+ bmap = fs->block_map;
+
+ if (EXT2_HAS_INCOMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_INCOMPAT_FLEX_BG) &&
+ fs->super->s_log_groups_per_flex) {
+ flexbg_size = 1 << fs->super->s_log_groups_per_flex;
+ last_grp = group | (flexbg_size - 1);
+ 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_blocks2(fs, group_blk, last_blk,
+ 1, bmap, &start_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);
+ start_blk += fs->inode_blocks_per_group;
+ start_blk += ((fs->stride * group) %
+ (last_blk - start_blk + 1));
+ if (start_blk >= last_blk)
+ start_blk = group_blk;
+ } else
+ start_blk = group_blk;
+
+ if (flexbg_size) {
+ blk64_t prev_block = 0;
+
+ if (group % flexbg_size)
+ prev_block = ext2fs_block_bitmap_loc(fs, group - 1) + 1;
+ start_blk = flexbg_offset(fs, group, prev_block, bmap,
+ rem_grps, 1);
+ last_blk = ext2fs_group_last_block2(fs, last_grp);
+ }
+
+ 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_blocks2(fs, group_blk,
+ last_blk, 1, bmap, &new_blk);
if (retval)
return retval;
- ext2fs_mark_block_bitmap(fs->block_map, new_blk);
- fs->group_desc[i].bg_block_bitmap = new_blk;
+ ext2fs_mark_block_bitmap2(bmap, new_blk);
+ ext2fs_block_bitmap_loc_set(fs, group, new_blk);
+ if (flexbg_size) {
+ 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);
+ }
+ }
- retval = ext2fs_get_free_blocks(fs, start_blk, last_blk,
- 1, fs->block_map, &new_blk);
+ if (flexbg_size) {
+ 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,
+ rem_grps, 1);
+ last_blk = ext2fs_group_last_block2(fs, last_grp);
+ }
+
+ 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_blocks2(fs, group_blk,
+ last_blk, 1, bmap, &new_blk);
if (retval)
return retval;
- ext2fs_mark_block_bitmap(fs->block_map, new_blk);
- fs->group_desc[i].bg_inode_bitmap = new_blk;
+ ext2fs_mark_block_bitmap2(bmap, new_blk);
+ ext2fs_inode_bitmap_loc_set(fs, group, new_blk);
+ if (flexbg_size) {
+ 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) {
+ blk64_t prev_block = 0;
- /*
- * Increment the start of the block group
- */
- group_blk += fs->super->s_blocks_per_group;
+ 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,
+ rem_grps, fs->inode_blocks_per_group);
+ last_blk = ext2fs_group_last_block2(fs, last_grp);
+ }
+
+ 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)
+ return retval;
+ for (j=0, blk = new_blk;
+ j < fs->inode_blocks_per_group;
+ j++, blk++) {
+ ext2fs_mark_block_bitmap2(bmap, blk);
+ if (flexbg_size) {
+ 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);
+ }
+ }
+ ext2fs_inode_table_loc_set(fs, group, new_blk);
+ }
+ ext2fs_group_desc_csum_set(fs, group);
+ return 0;
+}
+
+errcode_t ext2fs_allocate_tables(ext2_filsys fs)
+{
+ errcode_t retval;
+ dgrp_t i;
+ struct ext2fs_numeric_progress_struct progress;
+
+ ext2fs_numeric_progress_init(fs, &progress, NULL,
+ fs->group_desc_count);
+
+ for (i = 0; i < fs->group_desc_count; i++) {
+ ext2fs_numeric_progress_update(fs, &progress, i);
+ retval = ext2fs_allocate_group_table(fs, i, fs->block_map);
+ if (retval)
+ return retval;
}
+ ext2fs_numeric_progress_close(fs, &progress, NULL);
return 0;
}
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff