725 static void init_delayed_ref_head(struct btrfs_delayed_ref_head *head_ref,  in init_delayed_ref_head()  argument
767 	refcount_set(&head_ref->refs, 1);  in init_delayed_ref_head()
768 	head_ref->bytenr = generic_ref->bytenr;  in init_delayed_ref_head()
769 	head_ref->num_bytes = generic_ref->num_bytes;  in init_delayed_ref_head()
770 	head_ref->ref_mod = count_mod;  in init_delayed_ref_head()
771 	head_ref->reserved_bytes = reserved;  in init_delayed_ref_head()
772 	head_ref->must_insert_reserved = must_insert_reserved;  in init_delayed_ref_head()
773 	head_ref->owning_root = generic_ref->owning_root;  in init_delayed_ref_head()
774 	head_ref->is_data = (generic_ref->type == BTRFS_REF_DATA);  in init_delayed_ref_head()
775 	head_ref->is_system = (generic_ref->ref_root == BTRFS_CHUNK_TREE_OBJECTID);  in init_delayed_ref_head()
776 	head_ref->ref_tree = RB_ROOT_CACHED;  in init_delayed_ref_head()
777 	INIT_LIST_HEAD(&head_ref->ref_add_list);  in init_delayed_ref_head()
778 	head_ref->tracked = false;  in init_delayed_ref_head()
779 	head_ref->processing = false;  in init_delayed_ref_head()
780 	head_ref->total_ref_mod = count_mod;  in init_delayed_ref_head()
781 	spin_lock_init(&head_ref->lock);  in init_delayed_ref_head()
782 	mutex_init(&head_ref->mutex);  in init_delayed_ref_head()
786 		head_ref->level = generic_ref->tree_ref.level;  in init_delayed_ref_head()
788 		head_ref->level = U8_MAX;  in init_delayed_ref_head()
809 		     struct btrfs_delayed_ref_head *head_ref,  in add_delayed_ref_head()  argument
816 	const unsigned long index = (head_ref->bytenr >> fs_info->sectorsize_bits);  in add_delayed_ref_head()
823 	if (head_ref->bytenr >= MAX_LFS_FILESIZE) {  in add_delayed_ref_head()
828 			     head_ref->bytenr);  in add_delayed_ref_head()
839 						       head_ref->bytenr);  in add_delayed_ref_head()
852 	trace_add_delayed_ref_head(fs_info, head_ref, action);  in add_delayed_ref_head()
856 		update_existing_head_ref(trans, existing, head_ref);  in add_delayed_ref_head()
861 		kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref);  in add_delayed_ref_head()
862 		head_ref = existing;  in add_delayed_ref_head()
864 		existing = xa_store(&delayed_refs->head_refs, index, head_ref, GFP_ATOMIC);  in add_delayed_ref_head()
876 		head_ref->tracked = true;  in add_delayed_ref_head()
883 		if (head_ref->is_data && head_ref->ref_mod < 0) {  in add_delayed_ref_head()
884 			delayed_refs->pending_csums += head_ref->num_bytes;  in add_delayed_ref_head()
886 				btrfs_csum_bytes_to_leaves(fs_info, head_ref->num_bytes);  in add_delayed_ref_head()
894 	return head_ref;  in add_delayed_ref_head()
993 	struct btrfs_delayed_ref_head *head_ref;  in add_delayed_ref()  local
1008 	head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS);  in add_delayed_ref()
1009 	if (!head_ref) {  in add_delayed_ref()
1037 	init_delayed_ref_head(head_ref, generic_ref, record, reserved);  in add_delayed_ref()
1038 	head_ref->extent_op = extent_op;  in add_delayed_ref()
1046 	new_head_ref = add_delayed_ref_head(trans, head_ref, record,  in add_delayed_ref()
1054 	head_ref = new_head_ref;  in add_delayed_ref()
1056 	merged = insert_delayed_ref(trans, head_ref, node);  in add_delayed_ref()
1079 	kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref);  in add_delayed_ref()
1113 	struct btrfs_delayed_ref_head *head_ref;  in btrfs_add_delayed_extent_op()  local
1125 	head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS);  in btrfs_add_delayed_extent_op()
1126 	if (!head_ref)  in btrfs_add_delayed_extent_op()
1129 	init_delayed_ref_head(head_ref, &generic_ref, NULL, 0);  in btrfs_add_delayed_extent_op()
1130 	head_ref->extent_op = extent_op;  in btrfs_add_delayed_extent_op()
1136 		kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref);  in btrfs_add_delayed_extent_op()
1141 	head_ref_ret = add_delayed_ref_head(trans, head_ref, NULL,  in btrfs_add_delayed_extent_op()
1146 		kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref);  in btrfs_add_delayed_extent_op()