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net: bridge: resolve forwarding path for bridge devices

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Add .ndo_fill_forward_path for bridge devices.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pablo Neira Ayuso 2021-03-24 02:30:34 +01:00 committed by David S. Miller
parent e4417d6950
commit ec9d16bab6
2 changed files with 28 additions and 0 deletions
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1
include/linux/netdevice.h
View file

@ -851,6 +851,7 @@ typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
enum net_device_path_type {
DEV_PATH_ETHERNET = 0,
DEV_PATH_VLAN,
DEV_PATH_BRIDGE,
};
struct net_device_path {

27
net/bridge/br_device.c
View file

@ -385,6 +385,32 @@ static int br_del_slave(struct net_device *dev, struct net_device *slave_dev)
return br_del_if(br, slave_dev);
}
static int br_fill_forward_path(struct net_device_path_ctx *ctx,
struct net_device_path *path)
{
struct net_bridge_fdb_entry *f;
struct net_bridge_port *dst;
struct net_bridge *br;
if (netif_is_bridge_port(ctx->dev))
return -1;
br = netdev_priv(ctx->dev);
f = br_fdb_find_rcu(br, ctx->daddr, 0);
if (!f || !f->dst)
return -1;
dst = READ_ONCE(f->dst);
if (!dst)
return -1;
path->type = DEV_PATH_BRIDGE;
path->dev = dst->br->dev;
ctx->dev = dst->dev;
return 0;
}
static const struct ethtool_ops br_ethtool_ops = {
.get_drvinfo = br_getinfo,
.get_link = ethtool_op_get_link,
@ -419,6 +445,7 @@ static const struct net_device_ops br_netdev_ops = {
.ndo_bridge_setlink = br_setlink,
.ndo_bridge_dellink = br_dellink,
.ndo_features_check = passthru_features_check,
.ndo_fill_forward_path = br_fill_forward_path,
};
static struct device_type br_type = {