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81 lines
2.0 KiB
Diff
81 lines
2.0 KiB
Diff
From: Pablo Neira Ayuso <pablo@netfilter.org>
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Date: Wed, 24 Mar 2021 02:30:33 +0100
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Subject: [PATCH] net: 8021q: resolve forwarding path for vlan devices
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Add .ndo_fill_forward_path for vlan devices.
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For instance, assuming the following topology:
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IP forwarding
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/ \
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eth0.100 eth0
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eth0
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.
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.
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.
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ethX
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ab:cd:ef:ab:cd:ef
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For packets going through IP forwarding to eth0.100 whose destination
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MAC address is ab:cd:ef:ab:cd:ef, dev_fill_forward_path() provides the
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following path:
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eth0.100 -> eth0
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Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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---
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--- a/include/linux/netdevice.h
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+++ b/include/linux/netdevice.h
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@@ -843,11 +843,18 @@ typedef u16 (*select_queue_fallback_t)(s
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enum net_device_path_type {
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DEV_PATH_ETHERNET = 0,
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+ DEV_PATH_VLAN,
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};
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struct net_device_path {
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enum net_device_path_type type;
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const struct net_device *dev;
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+ union {
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+ struct {
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+ u16 id;
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+ __be16 proto;
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+ } encap;
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+ };
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};
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#define NET_DEVICE_PATH_STACK_MAX 5
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--- a/net/8021q/vlan_dev.c
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+++ b/net/8021q/vlan_dev.c
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@@ -770,6 +770,20 @@ static int vlan_dev_get_iflink(const str
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return real_dev->ifindex;
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}
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+static int vlan_dev_fill_forward_path(struct net_device_path_ctx *ctx,
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+ struct net_device_path *path)
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+{
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+ struct vlan_dev_priv *vlan = vlan_dev_priv(ctx->dev);
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+
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+ path->type = DEV_PATH_VLAN;
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+ path->encap.id = vlan->vlan_id;
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+ path->encap.proto = vlan->vlan_proto;
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+ path->dev = ctx->dev;
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+ ctx->dev = vlan->real_dev;
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+
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+ return 0;
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+}
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+
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static const struct ethtool_ops vlan_ethtool_ops = {
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.get_link_ksettings = vlan_ethtool_get_link_ksettings,
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.get_drvinfo = vlan_ethtool_get_drvinfo,
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@@ -808,6 +822,7 @@ static const struct net_device_ops vlan_
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#endif
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.ndo_fix_features = vlan_dev_fix_features,
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.ndo_get_iflink = vlan_dev_get_iflink,
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+ .ndo_fill_forward_path = vlan_dev_fill_forward_path,
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};
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static void vlan_dev_free(struct net_device *dev)
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