net/mlx5e: Update hw flows when encap source mac changed

When we offload tc filters to hardware, hardware flows can
be updated when mac of encap destination ip is changed.
But we ignore one case, that the mac of local encap ip can
be changed too, so we should also update them.

To fix it, add route_dev in mlx5e_encap_entry struct to save
the local encap netdevice, and when mac changed, kernel will
flush all the neighbour on the netdevice and send NETEVENT_NEIGH_UPDATE
event. The mlx5 driver will delete the flows and add them when neighbour
available again.

Fixes: de0289686ab6 ("net/mlx5e: Add support to neighbour update flow")
Cc: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Acked-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
index a3750af074a40c6e4b7c1b3b75873d8e38de619b..f3c7ab6faea505202d48d1b0bd862db010e87e99 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
@@ -256,6 +256,7 @@ int mlx5e_tc_tun_create_header_ipv4(struct mlx5e_priv *priv,
        e->m_neigh.family = n->ops->family;
        memcpy(&e->m_neigh.dst_ip, n->primary_key, n->tbl->key_len);
        e->out_dev = out_dev;
+       e->route_dev = route_dev;
 
        /* It's important to add the neigh to the hash table before checking
         * the neigh validity state. So if we'll get a notification, in case the
@@ -369,6 +370,7 @@ int mlx5e_tc_tun_create_header_ipv6(struct mlx5e_priv *priv,
        e->m_neigh.family = n->ops->family;
        memcpy(&e->m_neigh.dst_ip, n->primary_key, n->tbl->key_len);
        e->out_dev = out_dev;
+       e->route_dev = route_dev;
 
        /* It's importent to add the neigh to the hash table before checking
         * the neigh validity state. So if we'll get a notification, in case the

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
index f2573c2d2b5c246b466e346d69a173689e9f6318..ef9e472daffb0c6be75ae0eb9473d56f0dd34bd5 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
@@ -596,6 +596,10 @@ static void mlx5e_rep_update_flows(struct mlx5e_priv *priv,
        if (neigh_connected && !(e->flags & MLX5_ENCAP_ENTRY_VALID)) {
                ether_addr_copy(e->h_dest, ha);
                ether_addr_copy(eth->h_dest, ha);
+               /* Update the encap source mac, in case that we delete
+                * the flows when encap source mac changed.
+                */
+               ether_addr_copy(eth->h_source, e->route_dev->dev_addr);
 
                mlx5e_tc_encap_flows_add(priv, e);
        }

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.h b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.h
index edd722824697f42c45a7bf57c9c6c510d202bfea..36eafc877e6bf576e8dbb831bcfd27dd8f73d0aa 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.h
@@ -148,6 +148,7 @@ struct mlx5e_encap_entry {
        unsigned char h_dest[ETH_ALEN]; /* destination eth addr */
 
        struct net_device *out_dev;
+       struct net_device *route_dev;
        int tunnel_type;
        int tunnel_hlen;
        int reformat_type;