This is a note to let you know that I've just added the patch titled
net/mlx5e: Offload tuple rewrite for non-CT flows
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-mlx5e-offload-tuple-rewrite-for-non-ct-flows.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit d692bf6254310ffdd4cf5d95e1d86ef48b2597d0
Author: Dima Chumak <dchumak@xxxxxxxxxx>
Date: Thu Mar 4 21:28:11 2021 +0200
net/mlx5e: Offload tuple rewrite for non-CT flows
[ 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@xxxxxxxxxx>
Reviewed-by: Paul Blakey <paulb@xxxxxxxxxx>
Signed-off-by: Saeed Mahameed <saeedm@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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 &&
