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Date: Thu, 27 Jun 2019 16:12:39 -0700
From: Jakub Kicinski <jakub.kicinski@...ronome.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, oss-drivers@...ronome.com,
Pieter Jansen van Vuuren
<pieter.jansenvanvuuren@...ronome.com>,
Jakub Kicinski <jakub.kicinski@...ronome.com>,
John Hurley <john.hurley@...ronome.com>
Subject: [PATCH net-next 1/5] nfp: flower: refactor tunnel key layer calculation
From: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@...ronome.com>
Refactor the key layer calculation function, in particular the tunnel
key layer calculation by introducing helper functions. This is done
in preparation for supporting GRE tunnel offloads.
Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@...ronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
Reviewed-by: John Hurley <john.hurley@...ronome.com>
---
.../ethernet/netronome/nfp/flower/offload.c | 100 +++++++++++-------
1 file changed, 60 insertions(+), 40 deletions(-)
diff --git a/drivers/net/ethernet/netronome/nfp/flower/offload.c b/drivers/net/ethernet/netronome/nfp/flower/offload.c
index 39e6599f2bd7..6b28910442db 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/offload.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/offload.c
@@ -141,16 +141,16 @@ static bool nfp_flower_check_higher_than_l3(struct tc_cls_flower_offload *f)
}
static int
-nfp_flower_calc_opt_layer(struct flow_match_enc_opts *enc_opts,
+nfp_flower_calc_opt_layer(struct flow_dissector_key_enc_opts *enc_opts,
u32 *key_layer_two, int *key_size,
struct netlink_ext_ack *extack)
{
- if (enc_opts->key->len > NFP_FL_MAX_GENEVE_OPT_KEY) {
+ if (enc_opts->len > NFP_FL_MAX_GENEVE_OPT_KEY) {
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: geneve options exceed maximum length");
return -EOPNOTSUPP;
}
- if (enc_opts->key->len > 0) {
+ if (enc_opts->len > 0) {
*key_layer_two |= NFP_FLOWER_LAYER2_GENEVE_OP;
*key_size += sizeof(struct nfp_flower_geneve_options);
}
@@ -158,6 +158,57 @@ nfp_flower_calc_opt_layer(struct flow_match_enc_opts *enc_opts,
return 0;
}
+static int
+nfp_flower_calc_udp_tun_layer(struct flow_dissector_key_ports *enc_ports,
+ struct flow_dissector_key_enc_opts *enc_op,
+ u32 *key_layer_two, u8 *key_layer, int *key_size,
+ struct nfp_flower_priv *priv,
+ enum nfp_flower_tun_type *tun_type,
+ struct netlink_ext_ack *extack)
+{
+ int err;
+
+ switch (enc_ports->dst) {
+ case htons(IANA_VXLAN_UDP_PORT):
+ *tun_type = NFP_FL_TUNNEL_VXLAN;
+ *key_layer |= NFP_FLOWER_LAYER_VXLAN;
+ *key_size += sizeof(struct nfp_flower_ipv4_udp_tun);
+
+ if (enc_op) {
+ NL_SET_ERR_MSG_MOD(extack, "unsupported offload: encap options not supported on vxlan tunnels");
+ return -EOPNOTSUPP;
+ }
+ break;
+ case htons(GENEVE_UDP_PORT):
+ if (!(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE)) {
+ NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support geneve offload");
+ return -EOPNOTSUPP;
+ }
+ *tun_type = NFP_FL_TUNNEL_GENEVE;
+ *key_layer |= NFP_FLOWER_LAYER_EXT_META;
+ *key_size += sizeof(struct nfp_flower_ext_meta);
+ *key_layer_two |= NFP_FLOWER_LAYER2_GENEVE;
+ *key_size += sizeof(struct nfp_flower_ipv4_udp_tun);
+
+ if (!enc_op)
+ break;
+ if (!(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE_OPT)) {
+ NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support geneve option offload");
+ return -EOPNOTSUPP;
+ }
+ err = nfp_flower_calc_opt_layer(enc_op, key_layer_two,
+ key_size, extack);
+ if (err)
+ return err;
+ break;
+ default:
+ NL_SET_ERR_MSG_MOD(extack, "unsupported offload: tunnel type unknown");
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
static int
nfp_flower_calculate_key_layers(struct nfp_app *app,
struct net_device *netdev,
@@ -243,44 +294,13 @@ nfp_flower_calculate_key_layers(struct nfp_app *app,
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_OPTS))
flow_rule_match_enc_opts(rule, &enc_op);
- switch (enc_ports.key->dst) {
- case htons(IANA_VXLAN_UDP_PORT):
- *tun_type = NFP_FL_TUNNEL_VXLAN;
- key_layer |= NFP_FLOWER_LAYER_VXLAN;
- key_size += sizeof(struct nfp_flower_ipv4_udp_tun);
-
- if (enc_op.key) {
- NL_SET_ERR_MSG_MOD(extack, "unsupported offload: encap options not supported on vxlan tunnels");
- return -EOPNOTSUPP;
- }
- break;
- case htons(GENEVE_UDP_PORT):
- if (!(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE)) {
- NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support geneve offload");
- return -EOPNOTSUPP;
- }
- *tun_type = NFP_FL_TUNNEL_GENEVE;
- key_layer |= NFP_FLOWER_LAYER_EXT_META;
- key_size += sizeof(struct nfp_flower_ext_meta);
- key_layer_two |= NFP_FLOWER_LAYER2_GENEVE;
- key_size += sizeof(struct nfp_flower_ipv4_udp_tun);
- if (!enc_op.key)
- break;
- if (!(priv->flower_ext_feats &
- NFP_FL_FEATS_GENEVE_OPT)) {
- NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support geneve option offload");
- return -EOPNOTSUPP;
- }
- err = nfp_flower_calc_opt_layer(&enc_op, &key_layer_two,
- &key_size, extack);
- if (err)
- return err;
- break;
- default:
- NL_SET_ERR_MSG_MOD(extack, "unsupported offload: tunnel type unknown");
- return -EOPNOTSUPP;
- }
+ err = nfp_flower_calc_udp_tun_layer(enc_ports.key, enc_op.key,
+ &key_layer_two, &key_layer,
+ &key_size, priv, tun_type,
+ extack);
+ if (err)
+ return err;
/* Ensure the ingress netdev matches the expected tun type. */
if (!nfp_fl_netdev_is_tunnel_type(netdev, *tun_type)) {
--
2.21.0
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