Re: [PATCH RFC net-next 2/2] net/sched: Add flower2 packet classifier based on flower and PANDA parser

+int fl2_panda_parse(struct sk_buff *skb, struct fl2_flow_key* frame)
+{
+	int err;
+	struct panda_parser_big_metadata_one mdata;
+	void *data;
+	size_t pktlen;
+
+	memset(&mdata, 0, sizeof(mdata.panda_data));
+	memcpy(&mdata.frame, frame, sizeof(struct fl2_flow_key));
+
+	err = skb_linearize(skb);

+	if (err < 0)
+		return err;
+
+	BUG_ON(skb->data_len);
+
+	data = skb_mac_header(skb);
+	pktlen = skb_mac_header_len(skb) + skb->len;
+
+	err = panda_parse(PANDA_PARSER_KMOD_NAME(panda_parser_big_ether), data,
+			  pktlen, &mdata.panda_data, 0, 1);
+
+	if (err != PANDA_STOP_OKAY) {
+                pr_err("Failed to parse packet! (%d)", err);
+		return -1;
+        }
+
+	memcpy(frame, &mdata.frame, sizeof(struct fl2_flow_key));
+
+	return 0;
+}
+
+static int fl2_classify(struct sk_buff *skb, const struct tcf_proto *tp,
+		       struct tcf_result *res)
+{
+	struct cls_fl2_head *head = rcu_dereference_bh(tp->root);
+	struct fl2_flow_key skb_key;
+	struct fl2_flow_mask *mask;
+	struct cls_fl2_filter *f;
+
+	list_for_each_entry_rcu(mask, &head->masks, list) {
+		flow_dissector_init_keys(&skb_key.control, &skb_key.basic);
+		fl2_clear_masked_range(&skb_key, mask);
+
+		skb_flow_dissect_meta(skb, &mask->dissector, &skb_key);
+		/* skb_flow_dissect() does not set n_proto in case an unknown
+		 * protocol, so do it rather here.
+		 */
+		skb_key.basic.n_proto = skb_protocol(skb, false);
+
+		if(skb->vlan_present) {
+			skb_key.basic.n_proto = skb_protocol(skb, true);
+			skb_key.vlan.vlan_id = skb_vlan_tag_get_id(skb);
+			skb_key.vlan.vlan_priority = skb_vlan_tag_get_prio(skb);
+			skb_key.vlan.vlan_tpid = skb->vlan_proto;
+		}
+		
+		fl2_panda_parse(skb, &skb_key);
+
+		f = fl2_mask_lookup(mask, &skb_key);
+		if (f && !tc_skip_sw(f->flags)) {
+			*res = f->res;
+			return tcf_exts_exec(skb, &f->exts, res);
+		}
+	}
+	return -1;
+}