projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1b69c6d0 DA |
1 | /* |
| 2 | * net/l3mdev/l3mdev.c - L3 master device implementation | |
| 3 | * Copyright (c) 2015 Cumulus Networks | |
| 4 | * Copyright (c) 2015 David Ahern <dsa@cumulusnetworks.com> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License as published by | |
| 8 | * the Free Software Foundation; either version 2 of the License, or | |
| 9 | * (at your option) any later version. | |
| 10 | */ | |
| 11 | ||
| 12 | #include <linux/netdevice.h> | |
| 13 | #include <net/l3mdev.h> | |
| 14 | ||
| 15 | /** | |
| 16 | * l3mdev_master_ifindex - get index of L3 master device | |
| 17 | * @dev: targeted interface | |
| 18 | */ | |
| 19 | ||
| 3f2fb9a8 | 20 | int l3mdev_master_ifindex_rcu(const struct net_device *dev) |
| 1b69c6d0 DA |
21 | { |
| 22 | int ifindex = 0; | |
| 23 | ||
| 24 | if (!dev) | |
| 25 | return 0; | |
| 26 | ||
| 27 | if (netif_is_l3_master(dev)) { | |
| 28 | ifindex = dev->ifindex; | |
| fee6d4c7 | 29 | } else if (netif_is_l3_slave(dev)) { |
| 1b69c6d0 | 30 | struct net_device *master; |
| 3f2fb9a8 DA |
31 | struct net_device *_dev = (struct net_device *)dev; |
| 32 | ||
| 33 | /* netdev_master_upper_dev_get_rcu calls | |
| 34 | * list_first_or_null_rcu to walk the upper dev list. | |
| 35 | * list_first_or_null_rcu does not handle a const arg. We aren't | |
| 36 | * making changes, just want the master device from that list so | |
| 37 | * typecast to remove the const | |
| 38 | */ | |
| 39 | master = netdev_master_upper_dev_get_rcu(_dev); | |
| fee6d4c7 | 40 | if (master) |
| 1b69c6d0 DA |
41 | ifindex = master->ifindex; |
| 42 | } | |
| 43 | ||
| 44 | return ifindex; | |
| 45 | } | |
| 46 | EXPORT_SYMBOL_GPL(l3mdev_master_ifindex_rcu); | |
| 47 | ||
| 48 | /** | |
| 49 | * l3mdev_fib_table - get FIB table id associated with an L3 | |
| 50 | * master interface | |
| 51 | * @dev: targeted interface | |
| 52 | */ | |
| 53 | ||
| 54 | u32 l3mdev_fib_table_rcu(const struct net_device *dev) | |
| 55 | { | |
| 56 | u32 tb_id = 0; | |
| 57 | ||
| 58 | if (!dev) | |
| 59 | return 0; | |
| 60 | ||
| 61 | if (netif_is_l3_master(dev)) { | |
| 62 | if (dev->l3mdev_ops->l3mdev_fib_table) | |
| 63 | tb_id = dev->l3mdev_ops->l3mdev_fib_table(dev); | |
| fee6d4c7 | 64 | } else if (netif_is_l3_slave(dev)) { |
| 1b69c6d0 DA |
65 | /* Users of netdev_master_upper_dev_get_rcu need non-const, |
| 66 | * but current inet_*type functions take a const | |
| 67 | */ | |
| 68 | struct net_device *_dev = (struct net_device *) dev; | |
| 69 | const struct net_device *master; | |
| 70 | ||
| 71 | master = netdev_master_upper_dev_get_rcu(_dev); | |
| fee6d4c7 | 72 | if (master && |
| 1b69c6d0 DA |
73 | master->l3mdev_ops->l3mdev_fib_table) |
| 74 | tb_id = master->l3mdev_ops->l3mdev_fib_table(master); | |
| 75 | } | |
| 76 | ||
| 77 | return tb_id; | |
| 78 | } | |
| 79 | EXPORT_SYMBOL_GPL(l3mdev_fib_table_rcu); | |
| 80 | ||
| 81 | u32 l3mdev_fib_table_by_index(struct net *net, int ifindex) | |
| 82 | { | |
| 83 | struct net_device *dev; | |
| 84 | u32 tb_id = 0; | |
| 85 | ||
| 86 | if (!ifindex) | |
| 87 | return 0; | |
| 88 | ||
| 89 | rcu_read_lock(); | |
| 90 | ||
| 91 | dev = dev_get_by_index_rcu(net, ifindex); | |
| 92 | if (dev) | |
| 93 | tb_id = l3mdev_fib_table_rcu(dev); | |
| 94 | ||
| 95 | rcu_read_unlock(); | |
| 96 | ||
| 97 | return tb_id; | |
| 98 | } | |
| 99 | EXPORT_SYMBOL_GPL(l3mdev_fib_table_by_index); |