Change in Openvswitch to support MPLS label depth of 3 in ingress direction
The openvswitch was supporting a MPLS label depth of 1 in the ingress
direction though the userspace OVS supports a max depth of 3 labels.
This change enables openvswitch module to support a max depth of
3 labels in the ingress.
Signed-off-by: Martin Varghese <martin.varghese@nokia.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c
index 38147e6..9d375e7 100644
--- a/net/openvswitch/flow.c
+++ b/net/openvswitch/flow.c
@@ -637,27 +637,35 @@ static int key_extract_l3l4(struct sk_buff *skb, struct sw_flow_key *key)
memset(&key->ipv4, 0, sizeof(key->ipv4));
}
} else if (eth_p_mpls(key->eth.type)) {
- size_t stack_len = MPLS_HLEN;
+ u8 label_count = 1;
+ memset(&key->mpls, 0, sizeof(key->mpls));
skb_set_inner_network_header(skb, skb->mac_len);
while (1) {
__be32 lse;
- error = check_header(skb, skb->mac_len + stack_len);
+ error = check_header(skb, skb->mac_len +
+ label_count * MPLS_HLEN);
if (unlikely(error))
return 0;
memcpy(&lse, skb_inner_network_header(skb), MPLS_HLEN);
- if (stack_len == MPLS_HLEN)
- memcpy(&key->mpls.top_lse, &lse, MPLS_HLEN);
+ if (label_count <= MPLS_LABEL_DEPTH)
+ memcpy(&key->mpls.lse[label_count - 1], &lse,
+ MPLS_HLEN);
- skb_set_inner_network_header(skb, skb->mac_len + stack_len);
+ skb_set_inner_network_header(skb, skb->mac_len +
+ label_count * MPLS_HLEN);
if (lse & htonl(MPLS_LS_S_MASK))
break;
- stack_len += MPLS_HLEN;
+ label_count++;
}
+ if (label_count > MPLS_LABEL_DEPTH)
+ label_count = MPLS_LABEL_DEPTH;
+
+ key->mpls.num_labels_mask = GENMASK(label_count - 1, 0);
} else if (key->eth.type == htons(ETH_P_IPV6)) {
int nh_len; /* IPv6 Header + Extensions */