These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / net / l3mdev / l3mdev.c

diff --git a/kernel/net/l3mdev/l3mdev.c b/kernel/net/l3mdev/l3mdev.c
new file mode 100644 (file)
index 0000000..8e5ead3
--- /dev/null
+++ b/kernel/net/l3mdev/l3mdev.c
@@ -0,0 +1,92 @@
+/*
+ * 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);