529 static void init_delayed_ref_head(struct btrfs_delayed_ref_head *head_ref,  in init_delayed_ref_head()  argument
565 	refcount_set(&head_ref->refs, 1);  in init_delayed_ref_head()
566 	head_ref->bytenr = bytenr;  in init_delayed_ref_head()
567 	head_ref->num_bytes = num_bytes;  in init_delayed_ref_head()
568 	head_ref->ref_mod = count_mod;  in init_delayed_ref_head()
569 	head_ref->must_insert_reserved = must_insert_reserved;  in init_delayed_ref_head()
570 	head_ref->is_data = is_data;  in init_delayed_ref_head()
571 	head_ref->is_system = is_system;  in init_delayed_ref_head()
572 	head_ref->ref_tree = RB_ROOT;  in init_delayed_ref_head()
573 	INIT_LIST_HEAD(&head_ref->ref_add_list);  in init_delayed_ref_head()
574 	RB_CLEAR_NODE(&head_ref->href_node);  in init_delayed_ref_head()
575 	head_ref->processing = 0;  in init_delayed_ref_head()
576 	head_ref->total_ref_mod = count_mod;  in init_delayed_ref_head()
577 	head_ref->qgroup_reserved = 0;  in init_delayed_ref_head()
578 	head_ref->qgroup_ref_root = 0;  in init_delayed_ref_head()
579 	spin_lock_init(&head_ref->lock);  in init_delayed_ref_head()
580 	mutex_init(&head_ref->mutex);  in init_delayed_ref_head()
584 			head_ref->qgroup_ref_root = ref_root;  in init_delayed_ref_head()
585 			head_ref->qgroup_reserved = reserved;  in init_delayed_ref_head()
601 		     struct btrfs_delayed_ref_head *head_ref,  in add_delayed_ref_head()  argument
621 	trace_add_delayed_ref_head(trans->fs_info, head_ref, action);  in add_delayed_ref_head()
624 				&head_ref->href_node);  in add_delayed_ref_head()
626 		WARN_ON(qrecord && head_ref->qgroup_ref_root  in add_delayed_ref_head()
627 			&& head_ref->qgroup_reserved  in add_delayed_ref_head()
630 		update_existing_head_ref(delayed_refs, existing, head_ref,  in add_delayed_ref_head()
636 		kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref);  in add_delayed_ref_head()
637 		head_ref = existing;  in add_delayed_ref_head()
641 		if (head_ref->is_data && head_ref->ref_mod < 0)  in add_delayed_ref_head()
642 			delayed_refs->pending_csums += head_ref->num_bytes;  in add_delayed_ref_head()
651 		*new_ref_mod = head_ref->total_ref_mod;  in add_delayed_ref_head()
653 	return head_ref;  in add_delayed_ref_head()
720 	struct btrfs_delayed_ref_head *head_ref;  in btrfs_add_delayed_tree_ref()  local
733 	head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS);  in btrfs_add_delayed_tree_ref()
734 	if (!head_ref) {  in btrfs_add_delayed_tree_ref()
744 			kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref);  in btrfs_add_delayed_tree_ref()
760 	init_delayed_ref_head(head_ref, record, bytenr, num_bytes,  in btrfs_add_delayed_tree_ref()
762 	head_ref->extent_op = extent_op;  in btrfs_add_delayed_tree_ref()
771 	head_ref = add_delayed_ref_head(trans, head_ref, record,  in btrfs_add_delayed_tree_ref()
775 	ret = insert_delayed_ref(trans, delayed_refs, head_ref, &ref->node);  in btrfs_add_delayed_tree_ref()
801 	struct btrfs_delayed_ref_head *head_ref;  in btrfs_add_delayed_data_ref()  local
824 	head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS);  in btrfs_add_delayed_data_ref()
825 	if (!head_ref) {  in btrfs_add_delayed_data_ref()
836 					head_ref);  in btrfs_add_delayed_data_ref()
841 	init_delayed_ref_head(head_ref, record, bytenr, num_bytes, ref_root,  in btrfs_add_delayed_data_ref()
843 	head_ref->extent_op = NULL;  in btrfs_add_delayed_data_ref()
852 	head_ref = add_delayed_ref_head(trans, head_ref, record,  in btrfs_add_delayed_data_ref()
856 	ret = insert_delayed_ref(trans, delayed_refs, head_ref, &ref->node);  in btrfs_add_delayed_data_ref()
876 	struct btrfs_delayed_ref_head *head_ref;  in btrfs_add_delayed_extent_op()  local
879 	head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS);  in btrfs_add_delayed_extent_op()
880 	if (!head_ref)  in btrfs_add_delayed_extent_op()
883 	init_delayed_ref_head(head_ref, NULL, bytenr, num_bytes, 0, 0,  in btrfs_add_delayed_extent_op()
886 	head_ref->extent_op = extent_op;  in btrfs_add_delayed_extent_op()
891 	add_delayed_ref_head(trans, head_ref, NULL, BTRFS_UPDATE_DELAYED_HEAD,  in btrfs_add_delayed_extent_op()