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bridge: implement get_link_ksettings ethtool method 

We return the maximum speed of all active ports. This matches how the link
speed would give an upper limit for traffic to/from any single peer if the
bridge were replaced with a hardware switch.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matthias Schiffer 2019-11-12 22:12:25 +01:00 committed by David S. Miller
parent 36fe3a61aa
commit 542575fe4b
1 changed files with 34 additions and 2 deletions
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36
net/bridge/br_device.c
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@ -263,6 +263,37 @@ static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info)
strlcpy(info->bus_info, "N/A", sizeof(info->bus_info));
}
static int br_get_link_ksettings(struct net_device *dev,
struct ethtool_link_ksettings *cmd)
{
struct net_bridge *br = netdev_priv(dev);
struct net_bridge_port *p;
cmd->base.duplex = DUPLEX_UNKNOWN;
cmd->base.port = PORT_OTHER;
cmd->base.speed = SPEED_UNKNOWN;
list_for_each_entry(p, &br->port_list, list) {
struct ethtool_link_ksettings ecmd;
struct net_device *pdev = p->dev;
if (!netif_running(pdev) || !netif_oper_up(pdev))
continue;
if (__ethtool_get_link_ksettings(pdev, &ecmd))
continue;
if (ecmd.base.speed == (__u32)SPEED_UNKNOWN)
continue;
if (cmd->base.speed == (__u32)SPEED_UNKNOWN ||
cmd->base.speed < ecmd.base.speed)
cmd->base.speed = ecmd.base.speed;
}
return 0;
}
static netdev_features_t br_fix_features(struct net_device *dev,
netdev_features_t features)
{
@ -365,8 +396,9 @@ static int br_del_slave(struct net_device *dev, struct net_device *slave_dev)
}
static const struct ethtool_ops br_ethtool_ops = {
.get_drvinfo = br_getinfo,
.get_link = ethtool_op_get_link,
.get_drvinfo = br_getinfo,
.get_link = ethtool_op_get_link,
.get_link_ksettings = br_get_link_ksettings,
};
static const struct net_device_ops br_netdev_ops = {