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Date: Mon, 10 Dec 2018 16:26:56 -0800
From: Saeed Mahameed <saeedm@...lanox.com>
To: "David S. Miller" <davem@...emloft.net>
Cc: netdev@...r.kernel.org, Oz Shlomo <ozsh@...lanox.com>,
Saeed Mahameed <saeedm@...lanox.com>
Subject: [net-next 07/12] net/mlx5e: Refactor VXLAN tunnel decap offloading code
From: Oz Shlomo <ozsh@...lanox.com>
Separates the vxlan header match handling from the matching on the
general fields of ipv4/6 tunnels, thus allowing the common IP tunnel
match code to branch in down stream patch, to multiple IP tunnels.
This patch doesn't add any functionality.
Signed-off-by: Oz Shlomo <ozsh@...lanox.com>
Reviewed-by: Eli Britstein <elibr@...lanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
.../net/ethernet/mellanox/mlx5/core/en_tc.c | 90 +++++++++++--------
1 file changed, 51 insertions(+), 39 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index ed04ab8287e9..74823cab1d16 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -1193,21 +1193,59 @@ static void mlx5e_tc_del_flow(struct mlx5e_priv *priv,
mlx5e_tc_del_nic_flow(priv, flow);
}
-static void parse_vxlan_attr(struct mlx5_flow_spec *spec,
- struct tc_cls_flower_offload *f)
+static int parse_tunnel_vxlan_attr(struct mlx5e_priv *priv,
+ struct mlx5_flow_spec *spec,
+ struct tc_cls_flower_offload *f,
+ void *headers_c,
+ void *headers_v)
{
- void *headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
- outer_headers);
- void *headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
- outer_headers);
- void *misc_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
+ struct netlink_ext_ack *extack = f->common.extack;
+ struct flow_dissector_key_ports *key =
+ skb_flow_dissector_target(f->dissector,
+ FLOW_DISSECTOR_KEY_ENC_PORTS,
+ f->key);
+ struct flow_dissector_key_ports *mask =
+ skb_flow_dissector_target(f->dissector,
+ FLOW_DISSECTOR_KEY_ENC_PORTS,
+ f->mask);
+ void *misc_c = MLX5_ADDR_OF(fte_match_param,
+ spec->match_criteria,
misc_parameters);
- void *misc_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
+ void *misc_v = MLX5_ADDR_OF(fte_match_param,
+ spec->match_value,
misc_parameters);
+ /* Full udp dst port must be given */
+ if (!dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_PORTS) ||
+ memchr_inv(&mask->dst, 0xff, sizeof(mask->dst))) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "VXLAN decap filter must include enc_dst_port condition");
+ netdev_warn(priv->netdev,
+ "VXLAN decap filter must include enc_dst_port condition\n");
+ return -EOPNOTSUPP;
+ }
+
+ /* udp dst port must be knonwn as a VXLAN port */
+ if (!mlx5_vxlan_lookup_port(priv->mdev->vxlan, be16_to_cpu(key->dst))) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Matched UDP port is not registered as a VXLAN port");
+ netdev_warn(priv->netdev,
+ "UDP port %d is not registered as a VXLAN port\n",
+ be16_to_cpu(key->dst));
+ return -EOPNOTSUPP;
+ }
+
+ /* dst UDP port is valid here */
MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, ip_protocol);
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol, IPPROTO_UDP);
+ MLX5_SET(fte_match_set_lyr_2_4, headers_c, udp_dport, ntohs(mask->dst));
+ MLX5_SET(fte_match_set_lyr_2_4, headers_v, udp_dport, ntohs(key->dst));
+
+ MLX5_SET(fte_match_set_lyr_2_4, headers_c, udp_sport, ntohs(mask->src));
+ MLX5_SET(fte_match_set_lyr_2_4, headers_v, udp_sport, ntohs(key->src));
+
+ /* match on VNI */
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
struct flow_dissector_key_keyid *key =
skb_flow_dissector_target(f->dissector,
@@ -1222,6 +1260,7 @@ static void parse_vxlan_attr(struct mlx5_flow_spec *spec,
MLX5_SET(fte_match_set_misc, misc_v, vxlan_vni,
be32_to_cpu(key->keyid));
}
+ return 0;
}
static int parse_tunnel_attr(struct mlx5e_priv *priv,
@@ -1240,39 +1279,12 @@ static int parse_tunnel_attr(struct mlx5e_priv *priv,
f->key);
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_PORTS)) {
- struct flow_dissector_key_ports *key =
- skb_flow_dissector_target(f->dissector,
- FLOW_DISSECTOR_KEY_ENC_PORTS,
- f->key);
- struct flow_dissector_key_ports *mask =
- skb_flow_dissector_target(f->dissector,
- FLOW_DISSECTOR_KEY_ENC_PORTS,
- f->mask);
+ int err = 0;
- /* Full udp dst port must be given */
- if (memchr_inv(&mask->dst, 0xff, sizeof(mask->dst)))
+ err = parse_tunnel_vxlan_attr(priv, spec, f,
+ headers_c, headers_v);
+ if (err)
goto vxlan_match_offload_err;
-
- if (mlx5_vxlan_lookup_port(priv->mdev->vxlan, be16_to_cpu(key->dst)) &&
- MLX5_CAP_ESW(priv->mdev, vxlan_encap_decap))
- parse_vxlan_attr(spec, f);
- else {
- NL_SET_ERR_MSG_MOD(extack,
- "port isn't an offloaded vxlan udp dport");
- netdev_warn(priv->netdev,
- "%d isn't an offloaded vxlan udp dport\n", be16_to_cpu(key->dst));
- return -EOPNOTSUPP;
- }
-
- MLX5_SET(fte_match_set_lyr_2_4, headers_c,
- udp_dport, ntohs(mask->dst));
- MLX5_SET(fte_match_set_lyr_2_4, headers_v,
- udp_dport, ntohs(key->dst));
-
- MLX5_SET(fte_match_set_lyr_2_4, headers_c,
- udp_sport, ntohs(mask->src));
- MLX5_SET(fte_match_set_lyr_2_4, headers_v,
- udp_sport, ntohs(key->src));
} else { /* udp dst port must be given */
vxlan_match_offload_err:
NL_SET_ERR_MSG_MOD(extack,
--
2.19.2
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