diff options
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/dev.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index bae35c1ae192..6b90520a01b1 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -8105,6 +8105,39 @@ struct net_device *netdev_get_xmit_slave(struct net_device *dev, } EXPORT_SYMBOL(netdev_get_xmit_slave); +static struct net_device *netdev_sk_get_lower_dev(struct net_device *dev, + struct sock *sk) +{ + const struct net_device_ops *ops = dev->netdev_ops; + + if (!ops->ndo_sk_get_lower_dev) + return NULL; + return ops->ndo_sk_get_lower_dev(dev, sk); +} + +/** + * netdev_sk_get_lowest_dev - Get the lowest device in chain given device and socket + * @dev: device + * @sk: the socket + * + * %NULL is returned if no lower device is found. + */ + +struct net_device *netdev_sk_get_lowest_dev(struct net_device *dev, + struct sock *sk) +{ + struct net_device *lower; + + lower = netdev_sk_get_lower_dev(dev, sk); + while (lower) { + dev = lower; + lower = netdev_sk_get_lower_dev(dev, sk); + } + + return dev; +} +EXPORT_SYMBOL(netdev_sk_get_lowest_dev); + static void netdev_adjacent_add_links(struct net_device *dev) { struct netdev_adjacent *iter; |