From 61c806dafe81c58f41fec10fb5cad0d3a4390e3e Mon Sep 17 00:00:00 2001 From: Or Gerlitz Date: Mon, 10 Dec 2018 17:05:59 +0200 Subject: [PATCH] net/mlx5e: Avoid encap flows deletion attempt the 1st time a neigh is resolved Currently, we are deleting offloaded encap flows in case the relevant neigh becomes unconnected while the encap is valid (a sign that it used to be connected), or if the curr neigh mac is different from the cached mac (a sign that the remote side changed their mac). The 2nd check also applies when the neigh becomes connected on the 1st time (we start with zero mac). Before the offending commit, the deleting handler was practically no op, as no flows were offloaded. But since that commit, we offload neigh-less encap flows to slow path. Under mirroring scheme, we go into the delete handler, attempt to unoffload a mirror rule which was never set (as we were offloading to slow path) and crash. Fix that by calling the delete handler only when the encap is valid, which covers both cases mentioned above. Fixes: 5dbe906ff1d5 ('net/mlx5e: Use a slow path rule instead if vxlan neighbour isn't available') Signed-off-by: Or Gerlitz Signed-off-by: Eli Britstein Reviewed-by: Paul Blakey Signed-off-by: Saeed Mahameed --- drivers/net/ethernet/mellanox/mlx5/core/en_rep.c | 4 ++-- drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 7 +++---- 2 files changed, 5 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c index 6a4d782c1de17..820fe85100b08 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c @@ -467,8 +467,8 @@ static void mlx5e_rep_update_flows(struct mlx5e_priv *priv, ASSERT_RTNL(); - if ((!neigh_connected && (e->flags & MLX5_ENCAP_ENTRY_VALID)) || - !ether_addr_equal(e->h_dest, ha)) + if ((e->flags & MLX5_ENCAP_ENTRY_VALID) && + (!neigh_connected || !ether_addr_equal(e->h_dest, ha))) mlx5e_tc_encap_flows_del(priv, e); if (neigh_connected && !(e->flags & MLX5_ENCAP_ENTRY_VALID)) { diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c index 3b732c02b5e18..9dabe9d4b2798 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c @@ -1096,10 +1096,9 @@ void mlx5e_tc_encap_flows_del(struct mlx5e_priv *priv, flow->rule[0] = rule; } - if (e->flags & MLX5_ENCAP_ENTRY_VALID) { - e->flags &= ~MLX5_ENCAP_ENTRY_VALID; - mlx5_packet_reformat_dealloc(priv->mdev, e->encap_id); - } + /* we know that the encap is valid */ + e->flags &= ~MLX5_ENCAP_ENTRY_VALID; + mlx5_packet_reformat_dealloc(priv->mdev, e->encap_id); } static struct mlx5_fc *mlx5e_tc_get_counter(struct mlx5e_tc_flow *flow) -- 2.39.5