nfp: flower: configure tunnel neighbour on cmsg rx

nfp_tun_write_neigh() function will configure a tunnel neighbour when
calling nfp_tun_neigh_event_handler() or nfp_flower_cmsg_process_one_rx()
(with no tunnel neighbour type) from firmware.

When configuring IP on physical port as a tunnel endpoint, no operation
will be performed after receiving the cmsg mentioned above.

Therefore, add a progress to configure tunnel neighbour in this case.

v2: Correct format of fixes tag.

Fixes: f1df7956c11f ("nfp: flower: rework tunnel neighbour configuration")
Signed-off-by: Tianyu Yuan <tianyu.yuan@corigine.com>
Reviewed-by: Louis Peens <louis.peens@corigine.com>
Reviewed-by: Baowen Zheng <baowen.zheng@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20220714081915.148378-1-simon.horman@corigine.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c b/drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c
index 6bf3ec448e7e5b55266423577db7d2d49e5ee80d..97dcf8db7ed230490a46d4bc0ab84abaa8d109e8 100644 (file)
--- a/drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c
@@ -447,7 +447,8 @@ void nfp_tun_unlink_and_update_nn_entries(struct nfp_app *app,
 
 static void
 nfp_tun_write_neigh(struct net_device *netdev, struct nfp_app *app,
-                   void *flow, struct neighbour *neigh, bool is_ipv6)
+                   void *flow, struct neighbour *neigh, bool is_ipv6,
+                   bool override)
 {
        bool neigh_invalid = !(neigh->nud_state & NUD_VALID) || neigh->dead;
        size_t neigh_size = is_ipv6 ? sizeof(struct nfp_tun_neigh_v6) :
@@ -546,6 +547,13 @@ nfp_tun_write_neigh(struct net_device *netdev, struct nfp_app *app,
                if (nn_entry->flow)
                        list_del(&nn_entry->list_head);
                kfree(nn_entry);
+       } else if (nn_entry && !neigh_invalid && override) {
+               mtype = is_ipv6 ? NFP_FLOWER_CMSG_TYPE_TUN_NEIGH_V6 :
+                               NFP_FLOWER_CMSG_TYPE_TUN_NEIGH;
+               nfp_tun_link_predt_entries(app, nn_entry);
+               nfp_flower_xmit_tun_conf(app, mtype, neigh_size,
+                                        nn_entry->payload,
+                                        GFP_ATOMIC);
        }
 
        spin_unlock_bh(&priv->predt_lock);
@@ -610,7 +618,7 @@ nfp_tun_neigh_event_handler(struct notifier_block *nb, unsigned long event,
 
                        dst_release(dst);
                }
-               nfp_tun_write_neigh(n->dev, app, &flow6, n, true);
+               nfp_tun_write_neigh(n->dev, app, &flow6, n, true, false);
 #else
                return NOTIFY_DONE;
 #endif /* CONFIG_IPV6 */
@@ -633,7 +641,7 @@ nfp_tun_neigh_event_handler(struct notifier_block *nb, unsigned long event,
 
                        ip_rt_put(rt);
                }
-               nfp_tun_write_neigh(n->dev, app, &flow4, n, false);
+               nfp_tun_write_neigh(n->dev, app, &flow4, n, false, false);
        }
 #else
        return NOTIFY_DONE;
@@ -676,7 +684,7 @@ void nfp_tunnel_request_route_v4(struct nfp_app *app, struct sk_buff *skb)
        ip_rt_put(rt);
        if (!n)
                goto fail_rcu_unlock;
-       nfp_tun_write_neigh(n->dev, app, &flow, n, false);
+       nfp_tun_write_neigh(n->dev, app, &flow, n, false, true);
        neigh_release(n);
        rcu_read_unlock();
        return;
@@ -718,7 +726,7 @@ void nfp_tunnel_request_route_v6(struct nfp_app *app, struct sk_buff *skb)
        if (!n)
                goto fail_rcu_unlock;
 
-       nfp_tun_write_neigh(n->dev, app, &flow, n, true);
+       nfp_tun_write_neigh(n->dev, app, &flow, n, true, true);
        neigh_release(n);
        rcu_read_unlock();
        return;