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- /*
- * net/l3mdev/l3mdev.c - L3 master device implementation
- * Copyright (c) 2015 Cumulus Networks
- * Copyright (c) 2015 David Ahern <dsa@cumulusnetworks.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
- #include <linux/netdevice.h>
- #include <net/l3mdev.h>
- /**
- * l3mdev_master_ifindex - get index of L3 master device
- * @dev: targeted interface
- */
- int l3mdev_master_ifindex_rcu(struct net_device *dev)
- {
- int ifindex = 0;
- if (!dev)
- return 0;
- if (netif_is_l3_master(dev)) {
- ifindex = dev->ifindex;
- } else if (netif_is_l3_slave(dev)) {
- struct net_device *master;
- master = netdev_master_upper_dev_get_rcu(dev);
- if (master)
- ifindex = master->ifindex;
- }
- return ifindex;
- }
- EXPORT_SYMBOL_GPL(l3mdev_master_ifindex_rcu);
- /**
- * l3mdev_fib_table - get FIB table id associated with an L3
- * master interface
- * @dev: targeted interface
- */
- u32 l3mdev_fib_table_rcu(const struct net_device *dev)
- {
- u32 tb_id = 0;
- if (!dev)
- return 0;
- if (netif_is_l3_master(dev)) {
- if (dev->l3mdev_ops->l3mdev_fib_table)
- tb_id = dev->l3mdev_ops->l3mdev_fib_table(dev);
- } else if (netif_is_l3_slave(dev)) {
- /* Users of netdev_master_upper_dev_get_rcu need non-const,
- * but current inet_*type functions take a const
- */
- struct net_device *_dev = (struct net_device *) dev;
- const struct net_device *master;
- master = netdev_master_upper_dev_get_rcu(_dev);
- if (master &&
- master->l3mdev_ops->l3mdev_fib_table)
- tb_id = master->l3mdev_ops->l3mdev_fib_table(master);
- }
- return tb_id;
- }
- EXPORT_SYMBOL_GPL(l3mdev_fib_table_rcu);
- u32 l3mdev_fib_table_by_index(struct net *net, int ifindex)
- {
- struct net_device *dev;
- u32 tb_id = 0;
- if (!ifindex)
- return 0;
- rcu_read_lock();
- dev = dev_get_by_index_rcu(net, ifindex);
- if (dev)
- tb_id = l3mdev_fib_table_rcu(dev);
- rcu_read_unlock();
- return tb_id;
- }
- EXPORT_SYMBOL_GPL(l3mdev_fib_table_by_index);
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