+
+void ext2fs_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
+ blk_t num, int inuse)
+{
+#ifndef OMIT_COM_ERR
+ if (blk + num > ext2fs_blocks_count(fs->super)) {
+ com_err("ext2fs_block_alloc_stats_range", 0,
+ "Illegal block range: %llu (%u) ",
+ (unsigned long long) blk, num);
+ return;
+ }
+#endif
+ if (inuse == 0)
+ return;
+ if (inuse > 0) {
+ ext2fs_mark_block_bitmap_range2(fs->block_map, blk, num);
+ inuse = 1;
+ } else {
+ ext2fs_unmark_block_bitmap_range2(fs->block_map, blk, num);
+ inuse = -1;
+ }
+ while (num) {
+ int group = ext2fs_group_of_blk2(fs, blk);
+ blk64_t last_blk = ext2fs_group_last_block2(fs, group);
+ blk64_t n = num;
+
+ if (blk + num > last_blk)
+ n = last_blk - blk + 1;
+
+ ext2fs_bg_free_blocks_count_set(fs, group,
+ ext2fs_bg_free_blocks_count(fs, group) -
+ inuse*n/EXT2FS_CLUSTER_RATIO(fs));
+ ext2fs_bg_flags_clear(fs, group, EXT2_BG_BLOCK_UNINIT);
+ ext2fs_group_desc_csum_set(fs, group);
+ ext2fs_free_blocks_count_add(fs->super, -inuse * (blk64_t) n);
+ blk += n;
+ num -= n;
+ }
+ ext2fs_mark_super_dirty(fs);
+ ext2fs_mark_bb_dirty(fs);
+ if (fs->block_alloc_stats_range)
+ (fs->block_alloc_stats_range)(fs, blk, num, inuse);
+}
+
+void ext2fs_set_block_alloc_stats_range_callback(ext2_filsys fs,
+ void (*func)(ext2_filsys fs, blk64_t blk,
+ blk_t num, int inuse),
+ void (**old)(ext2_filsys fs, blk64_t blk,
+ blk_t num, int inuse))
+{
+ if (!fs || fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS)
+ return;
+ if (old)
+ *old = fs->block_alloc_stats_range;
+
+ fs->block_alloc_stats_range = func;
+}