net: hsr: Send supervisory frames to HSR network with ProxyNodeTable data

This patch provides support for sending supervision HSR frames with
MAC addresses stored in ProxyNodeTable when RedBox (i.e. HSR-SAN) is
enabled.

Supervision frames with RedBox MAC address (appended as second TLV)
are only send for ProxyNodeTable nodes.

This patch series shall be tested with hsr_redbox.sh script.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 35 insertions, 2 deletions

diff --git a/net/hsr/hsr_forward.c b/net/hsr/hsr_forward.c
index 05a61b8286ec..960ef386bc3a 100644
--- a/net/hsr/hsr_forward.c
+++ b/net/hsr/hsr_forward.c
@@ -117,6 +117,35 @@ static bool is_supervision_frame(struct hsr_priv *hsr, struct sk_buff *skb)
 	return true;
 }
 
+static bool is_proxy_supervision_frame(struct hsr_priv *hsr,
+				       struct sk_buff *skb)
+{
+	struct hsr_sup_payload *payload;
+	struct ethhdr *eth_hdr;
+	u16 total_length = 0;
+
+	eth_hdr = (struct ethhdr *)skb_mac_header(skb);
+
+	/* Get the HSR protocol revision. */
+	if (eth_hdr->h_proto == htons(ETH_P_HSR))
+		total_length = sizeof(struct hsrv1_ethhdr_sp);
+	else
+		total_length = sizeof(struct hsrv0_ethhdr_sp);
+
+	if (!pskb_may_pull(skb, total_length + sizeof(struct hsr_sup_payload)))
+		return false;
+
+	skb_pull(skb, total_length);
+	payload = (struct hsr_sup_payload *)skb->data;
+	skb_push(skb, total_length);
+
+	/* For RedBox (HSR-SAN) check if we have received the supervision
+	 * frame with MAC addresses from own ProxyNodeTable.
+	 */
+	return hsr_is_node_in_db(&hsr->proxy_node_db,
+				 payload->macaddress_A);
+}
+
 static struct sk_buff *create_stripped_skb_hsr(struct sk_buff *skb_in,
 					       struct hsr_frame_info *frame)
 {
@@ -499,7 +528,8 @@ static void hsr_forward_do(struct hsr_frame_info *frame)
 					   frame->sequence_nr))
 			continue;
 
-		if (frame->is_supervision && port->type == HSR_PT_MASTER) {
+		if (frame->is_supervision && port->type == HSR_PT_MASTER &&
+		    !frame->is_proxy_supervision) {
 			hsr_handle_sup_frame(frame);
 			continue;
 		}
@@ -637,6 +667,9 @@ static int fill_frame_info(struct hsr_frame_info *frame,
 
 	memset(frame, 0, sizeof(*frame));
 	frame->is_supervision = is_supervision_frame(port->hsr, skb);
+	if (frame->is_supervision && hsr->redbox)
+		frame->is_proxy_supervision =
+			is_proxy_supervision_frame(port->hsr, skb);
 
 	n_db = &hsr->node_db;
 	if (port->type == HSR_PT_INTERLINK)
@@ -688,7 +721,7 @@ void hsr_forward_skb(struct sk_buff *skb, struct hsr_port *port)
 	/* Gets called for ingress frames as well as egress from master port.
 	 * So check and increment stats for master port only here.
 	 */
-	if (port->type == HSR_PT_MASTER) {
+	if (port->type == HSR_PT_MASTER || port->type == HSR_PT_INTERLINK) {
 		port->dev->stats.tx_packets++;
 		port->dev->stats.tx_bytes += skb->len;
 	}