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netdev-offload-tc: Add recirculation support via tc chains

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Each recirculation id will create a tc chain, and we translate
the recirculation action to a tc goto chain action.

We check for kernel support for this by probing OvS Datapath for the
tc recirc id sharing feature. If supported, we can offload rules
that match on recirc_id, and recirculation action safely.

Signed-off-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
This commit is contained in:
Paul Blakey
2019-12-22 12:16:40 +02:00
committed by Simon Horman
parent 7c53bd7839
commit b2ae40690e
5 changed files with 102 additions and 17 deletions
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7
lib/dpif-netlink.c
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@@ -110,6 +110,8 @@ static int dpif_netlink_dp_transact(const struct dpif_netlink_dp *request,
static int dpif_netlink_dp_get(const struct dpif *,
struct dpif_netlink_dp *reply,
struct ofpbuf **bufp);
static int
dpif_netlink_set_features(struct dpif *dpif_, uint32_t new_features);
struct dpif_netlink_flow {
/* Generic Netlink header. */
@@ -363,7 +365,9 @@ dpif_netlink_open(const struct dpif_class *class OVS_UNUSED, const char *name,
}
error = open_dpif(&dp, dpifp);
dpif_netlink_set_features(*dpifp, OVS_DP_F_TC_RECIRC_SHARING);
ofpbuf_delete(buf);
return error;
}
@@ -1638,6 +1642,7 @@ dpif_netlink_netdev_match_to_dpif_flow(struct match *match,
.mask = &match->wc.masks,
.support = {
.max_vlan_headers = 2,
.recirc = true,
},
};
size_t offset;
@@ -2082,6 +2087,8 @@ parse_flow_put(struct dpif_netlink *dpif, struct dpif_flow_put *put)
info.dpif_class = dpif_class;
info.tp_dst_port = dst_port;
info.tunnel_csum_on = csum_on;
info.recirc_id_shared_with_tc = (dpif->user_features
& OVS_DP_F_TC_RECIRC_SHARING);
err = netdev_flow_put(dev, &match,
CONST_CAST(struct nlattr *, put->actions),
put->actions_len,