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Message-Id: <20201015011630.2399-4-pablo@netfilter.org>
Date: Thu, 15 Oct 2020 03:16:24 +0200
From: Pablo Neira Ayuso <pablo@...filter.org>
To: netfilter-devel@...r.kernel.org
Cc: davem@...emloft.net, netdev@...r.kernel.org, kuba@...nel.org
Subject: [PATCH net-next 3/9] net: 8021q: resolve forwarding path for vlan devices
Add .ndo_fill_forward_path for vlan devices.
For instance, assuming the following topology:
IP forwarding
/ \
eth0.100 eth0
|
eth0
.
.
.
ethX
ab:cd:ef:ab:cd:ef
For packets in the IP forwarding going to eth0.100 whose destination MAC
address is ab:cd:ef:ab:cd:ef, dev_fill_forward_path() provides the
following path:
eth0.100 -> eth0
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
---
include/linux/netdevice.h | 7 +++++++
net/8021q/vlan_dev.c | 15 +++++++++++++++
2 files changed, 22 insertions(+)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index b77960621c27..6a3370fafe4b 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -835,11 +835,18 @@ typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
enum net_device_path_type {
DEV_PATH_ETHERNET = 0,
+ DEV_PATH_VLAN,
};
struct net_device_path {
enum net_device_path_type type;
const struct net_device *dev;
+ union {
+ struct {
+ __be16 id;
+ __be16 proto;
+ } vlan;
+ };
};
#define NET_DEVICE_PATH_STACK_MAX 5
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index ec8408d1638f..f06a507557f9 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -767,6 +767,20 @@ static int vlan_dev_get_iflink(const struct net_device *dev)
return real_dev->ifindex;
}
+static int vlan_dev_fill_forward_path(struct net_device_path_ctx *ctx,
+ struct net_device_path *path)
+{
+ struct vlan_dev_priv *vlan = vlan_dev_priv(ctx->dev);
+
+ path->type = DEV_PATH_VLAN;
+ path->vlan.id = vlan->vlan_id;
+ path->vlan.proto = vlan->vlan_proto;
+ path->dev = ctx->dev;
+ ctx->dev = vlan->real_dev;
+
+ return 0;
+}
+
static const struct ethtool_ops vlan_ethtool_ops = {
.get_link_ksettings = vlan_ethtool_get_link_ksettings,
.get_drvinfo = vlan_ethtool_get_drvinfo,
@@ -805,6 +819,7 @@ static const struct net_device_ops vlan_netdev_ops = {
#endif
.ndo_fix_features = vlan_dev_fix_features,
.ndo_get_iflink = vlan_dev_get_iflink,
+ .ndo_fill_forward_path = vlan_dev_fill_forward_path,
};
static void vlan_dev_free(struct net_device *dev)
--
2.20.1
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