30 	struct cls_cgroup_head *head = rcu_dereference_bh(tp->root);  in cls_cgroup_classify()  local
33 	if (unlikely(!head))  in cls_cgroup_classify()
37 	if (!tcf_em_tree_match(skb, &head->ematches, NULL))  in cls_cgroup_classify()
43 	return tcf_exts_exec(skb, &head->exts, res);  in cls_cgroup_classify()
60 static void __cls_cgroup_destroy(struct cls_cgroup_head *head)  in __cls_cgroup_destroy()  argument
62 	tcf_exts_destroy(&head->exts);  in __cls_cgroup_destroy()
63 	tcf_em_tree_destroy(&head->ematches);  in __cls_cgroup_destroy()
64 	tcf_exts_put_net(&head->exts);  in __cls_cgroup_destroy()
65 	kfree(head);  in __cls_cgroup_destroy()
70 	struct cls_cgroup_head *head = container_of(to_rcu_work(work),  in cls_cgroup_destroy_work()  local
74 	__cls_cgroup_destroy(head);  in cls_cgroup_destroy_work()
85 	struct cls_cgroup_head *head = rtnl_dereference(tp->root);  in cls_cgroup_change()  local
92 	if (!head && !handle)  in cls_cgroup_change()
95 	if (head && handle != head->handle)  in cls_cgroup_change()
98 	new = kzalloc(sizeof(*head), GFP_KERNEL);  in cls_cgroup_change()
123 	if (head) {  in cls_cgroup_change()
124 		tcf_exts_get_net(&head->exts);  in cls_cgroup_change()
125 		tcf_queue_work(&head->rwork, cls_cgroup_destroy_work);  in cls_cgroup_change()
137 	struct cls_cgroup_head *head = rtnl_dereference(tp->root);  in cls_cgroup_destroy()  local
140 	if (head) {  in cls_cgroup_destroy()
141 		if (tcf_exts_get_net(&head->exts))  in cls_cgroup_destroy()
142 			tcf_queue_work(&head->rwork, cls_cgroup_destroy_work);  in cls_cgroup_destroy()
144 			__cls_cgroup_destroy(head);  in cls_cgroup_destroy()
157 	struct cls_cgroup_head *head = rtnl_dereference(tp->root);  in cls_cgroup_walk()  local
162 	if (!head)  in cls_cgroup_walk()
164 	if (arg->fn(tp, head, arg) < 0) {  in cls_cgroup_walk()
175 	struct cls_cgroup_head *head = rtnl_dereference(tp->root);  in cls_cgroup_dump()  local
178 	t->tcm_handle = head->handle;  in cls_cgroup_dump()
184 	if (tcf_exts_dump(skb, &head->exts) < 0 ||  in cls_cgroup_dump()
185 	    tcf_em_tree_dump(skb, &head->ematches, TCA_CGROUP_EMATCHES) < 0)  in cls_cgroup_dump()
190 	if (tcf_exts_dump_stats(skb, &head->exts) < 0)  in cls_cgroup_dump()