+ trans = btrfs_start_transaction(root, 1);
+
+ key.objectid = 0;
+ key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
+ key.offset = 0;
+
+ while (1) {
+ /*
+ * as the rest of the loop may modify the tree, we need to
+ * start a new search each time.
+ */
+ ret = btrfs_search_slot(trans, root, &key, path, 0, 0);
+ if (ret < 0)
+ goto out;
+
+ btrfs_item_key_to_cpu(path->nodes[0], &found_key,
+ path->slots[0]);
+ if (found_key.objectid < key.objectid)
+ goto out;
+ if (found_key.type != BTRFS_BLOCK_GROUP_ITEM_KEY) {
+ ret = next_block_group(root, path);
+ if (ret < 0)
+ goto out;
+ if (ret > 0) {
+ ret = 0;
+ goto out;
+ }
+ btrfs_item_key_to_cpu(path->nodes[0], &found_key,
+ path->slots[0]);
+ }
+
+ bgi = btrfs_item_ptr(path->nodes[0], path->slots[0],
+ struct btrfs_block_group_item);
+ if (is_temp_block_group(path->nodes[0], bgi,
+ data_profile, meta_profile,
+ sys_profile)) {
+ u64 flags = btrfs_disk_block_group_flags(path->nodes[0],
+ bgi);
+
+ ret = btrfs_free_block_group(trans, fs_info,
+ found_key.objectid, found_key.offset);
+ if (ret < 0)
+ goto out;
+
+ if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
+ BTRFS_BLOCK_GROUP_DATA)
+ alloc->data -= found_key.offset;
+ else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
+ BTRFS_BLOCK_GROUP_METADATA)
+ alloc->metadata -= found_key.offset;
+ else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
+ BTRFS_BLOCK_GROUP_SYSTEM)
+ alloc->system -= found_key.offset;
+ else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) ==
+ (BTRFS_BLOCK_GROUP_METADATA |
+ BTRFS_BLOCK_GROUP_DATA))
+ alloc->mixed -= found_key.offset;
+ }
+ btrfs_release_path(path);
+ key.objectid = found_key.objectid + found_key.offset;
+ }
+out:
+ if (trans)
+ btrfs_commit_transaction(trans, root);
+ btrfs_free_path(path);
+ return ret;