diff options
Diffstat (limited to 'net/l3mdev/l3mdev.c')
| -rw-r--r-- | net/l3mdev/l3mdev.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/net/l3mdev/l3mdev.c b/net/l3mdev/l3mdev.c index 8da86ceca33d..309dee76724e 100644 --- a/net/l3mdev/l3mdev.c +++ b/net/l3mdev/l3mdev.c @@ -47,6 +47,24 @@ int l3mdev_master_ifindex_rcu(const struct net_device *dev) EXPORT_SYMBOL_GPL(l3mdev_master_ifindex_rcu); /** + * l3mdev_master_upper_ifindex_by_index - get index of upper l3 master + * device + * @net: network namespace for device index lookup + * @ifindex: targeted interface + */ +int l3mdev_master_upper_ifindex_by_index_rcu(struct net *net, int ifindex) +{ + struct net_device *dev; + + dev = dev_get_by_index_rcu(net, ifindex); + while (dev && !netif_is_l3_master(dev)) + dev = netdev_master_upper_dev_get(dev); + + return dev ? dev->ifindex : 0; +} +EXPORT_SYMBOL_GPL(l3mdev_master_upper_ifindex_by_index_rcu); + +/** * l3mdev_fib_table - get FIB table id associated with an L3 * master interface * @dev: targeted interface |