From: Dima Chumak dchumak@nvidia.com
[ Upstream commit 96b5b4585843e3c83fb1930e5dfbefd0fb889c55 ]
Setting connection tracking OVS flows and then setting non-CT flows that use tuple rewrite action (e.g. mod_tp_dst), causes the latter flows not being offloaded.
Fix by using a stricter condition in modify_header_match_supported() to check tuple rewrite support only for flows with CT action. The check is factored out into standalone modify_tuple_supported() function to aid readability.
Fixes: 7e36feeb0467 ("net/mlx5e: CT: Don't offload tuple rewrites for established tuples") Signed-off-by: Dima Chumak dchumak@nvidia.com Reviewed-by: Paul Blakey paulb@nvidia.com Signed-off-by: Saeed Mahameed saeedm@nvidia.com Signed-off-by: Sasha Levin sashal@kernel.org --- .../ethernet/mellanox/mlx5/core/en/tc_ct.c | 3 +- .../net/ethernet/mellanox/mlx5/core/en_tc.c | 44 ++++++++++++++----- 2 files changed, 35 insertions(+), 12 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c index 24e2c0d955b9..b42396df3111 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c @@ -1182,7 +1182,8 @@ int mlx5_tc_ct_add_no_trk_match(struct mlx5_flow_spec *spec)
mlx5e_tc_match_to_reg_get_match(spec, CTSTATE_TO_REG, &ctstate, &ctstate_mask); - if (ctstate_mask) + + if ((ctstate & ctstate_mask) == MLX5_CT_STATE_TRK_BIT) return -EOPNOTSUPP;
ctstate_mask |= MLX5_CT_STATE_TRK_BIT; diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c index 77ee24d52203..930f19c598bb 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c @@ -3210,6 +3210,37 @@ static int is_action_keys_supported(const struct flow_action_entry *act, return 0; }
+static bool modify_tuple_supported(bool modify_tuple, bool ct_clear, + bool ct_flow, struct netlink_ext_ack *extack, + struct mlx5e_priv *priv, + struct mlx5_flow_spec *spec) +{ + if (!modify_tuple || ct_clear) + return true; + + if (ct_flow) { + NL_SET_ERR_MSG_MOD(extack, + "can't offload tuple modification with non-clear ct()"); + netdev_info(priv->netdev, + "can't offload tuple modification with non-clear ct()"); + return false; + } + + /* Add ct_state=-trk match so it will be offloaded for non ct flows + * (or after clear action), as otherwise, since the tuple is changed, + * we can't restore ct state + */ + if (mlx5_tc_ct_add_no_trk_match(spec)) { + NL_SET_ERR_MSG_MOD(extack, + "can't offload tuple modification with ct matches and no ct(clear) action"); + netdev_info(priv->netdev, + "can't offload tuple modification with ct matches and no ct(clear) action"); + return false; + } + + return true; +} + static bool modify_header_match_supported(struct mlx5e_priv *priv, struct mlx5_flow_spec *spec, struct flow_action *flow_action, @@ -3248,18 +3279,9 @@ static bool modify_header_match_supported(struct mlx5e_priv *priv, return err; }
- /* Add ct_state=-trk match so it will be offloaded for non ct flows - * (or after clear action), as otherwise, since the tuple is changed, - * we can't restore ct state - */ - if (!ct_clear && modify_tuple && - mlx5_tc_ct_add_no_trk_match(spec)) { - NL_SET_ERR_MSG_MOD(extack, - "can't offload tuple modify header with ct matches"); - netdev_info(priv->netdev, - "can't offload tuple modify header with ct matches"); + if (!modify_tuple_supported(modify_tuple, ct_clear, ct_flow, extack, + priv, spec)) return false; - }
ip_proto = MLX5_GET(fte_match_set_lyr_2_4, headers_v, ip_protocol); if (modify_ip_header && ip_proto != IPPROTO_TCP &&