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From: Felix Fietkau <nbd@nbd.name>
Date: Thu, 17 Sep 2020 18:41:23 +0200
Subject: [PATCH] net: dsa: support hardware flow table offload
Look up the master device and the port id
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
--- a/include/net/netfilter/nf_flow_table.h
+++ b/include/net/netfilter/nf_flow_table.h
@@ -93,6 +93,7 @@ struct flow_offload {
#define FLOW_OFFLOAD_PATH_ETHERNET BIT(0)
#define FLOW_OFFLOAD_PATH_VLAN BIT(1)
#define FLOW_OFFLOAD_PATH_PPPOE BIT(2)
+#define FLOW_OFFLOAD_PATH_DSA BIT(3)
struct flow_offload_hw_path {
struct net_device *dev;
@@ -103,6 +104,7 @@ struct flow_offload_hw_path {
u16 vlan_proto;
u16 vlan_id;
u16 pppoe_sid;
+ u16 dsa_port;
};
#define NF_FLOW_TIMEOUT (30 * HZ)
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -19,6 +19,10 @@
#include <linux/if_bridge.h>
#include <linux/netpoll.h>
#include <linux/ptp_classify.h>
+#if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
+#include <linux/netfilter.h>
+#include <net/netfilter/nf_flow_table.h>
+#endif
#include "dsa_priv.h"
@@ -1226,6 +1230,27 @@ static struct devlink_port *dsa_slave_ge
return dp->ds->devlink ? &dp->devlink_port : NULL;
}
+#if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
+static int dsa_flow_offload_check(struct flow_offload_hw_path *path)
+{
+ struct net_device *dev = path->dev;
+ struct dsa_port *dp;
+
+ if (!(path->flags & FLOW_OFFLOAD_PATH_ETHERNET))
+ return -EINVAL;
+
+ dp = dsa_slave_to_port(dev);
+ path->dsa_port = dp->index;
+ path->dev = dsa_slave_to_master(dev);
+ path->flags |= FLOW_OFFLOAD_PATH_DSA;
+
+ if (path->dev->netdev_ops->ndo_flow_offload_check)
+ return path->dev->netdev_ops->ndo_flow_offload_check(path);
+
+ return 0;
+}
+#endif /* CONFIG_NF_FLOW_TABLE */
+
static const struct net_device_ops dsa_slave_netdev_ops = {
.ndo_open = dsa_slave_open,
.ndo_stop = dsa_slave_close,
@@ -1250,6 +1275,9 @@ static const struct net_device_ops dsa_s
.ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
.ndo_get_devlink_port = dsa_slave_get_devlink_port,
+#if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
+ .ndo_flow_offload_check = dsa_flow_offload_check,
+#endif
};
static struct device_type dsa_type = {
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