| David Ahern | 1b69c6d | 2015-09-29 20:07:11 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * include/net/l3mdev.h - L3 master device API |
| 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 | #ifndef _NET_L3MDEV_H_ |
| 12 | #define _NET_L3MDEV_H_ |
| 13 | |
| 14 | /** |
| 15 | * struct l3mdev_ops - l3mdev operations |
| 16 | * |
| 17 | * @l3mdev_fib_table: Get FIB table id to use for lookups |
| 18 | * |
| 19 | * @l3mdev_get_rtable: Get cached IPv4 rtable (dst_entry) for device |
| 20 | */ |
| 21 | |
| 22 | struct l3mdev_ops { |
| 23 | u32 (*l3mdev_fib_table)(const struct net_device *dev); |
| 24 | struct rtable * (*l3mdev_get_rtable)(const struct net_device *dev, |
| 25 | const struct flowi4 *fl4); |
| 26 | }; |
| 27 | |
| 28 | #ifdef CONFIG_NET_L3_MASTER_DEV |
| 29 | |
| 30 | int l3mdev_master_ifindex_rcu(struct net_device *dev); |
| 31 | static inline int l3mdev_master_ifindex(struct net_device *dev) |
| 32 | { |
| 33 | int ifindex; |
| 34 | |
| 35 | rcu_read_lock(); |
| 36 | ifindex = l3mdev_master_ifindex_rcu(dev); |
| 37 | rcu_read_unlock(); |
| 38 | |
| 39 | return ifindex; |
| 40 | } |
| 41 | |
| 42 | /* get index of an interface to use for FIB lookups. For devices |
| 43 | * enslaved to an L3 master device FIB lookups are based on the |
| 44 | * master index |
| 45 | */ |
| 46 | static inline int l3mdev_fib_oif_rcu(struct net_device *dev) |
| 47 | { |
| 48 | return l3mdev_master_ifindex_rcu(dev) ? : dev->ifindex; |
| 49 | } |
| 50 | |
| 51 | static inline int l3mdev_fib_oif(struct net_device *dev) |
| 52 | { |
| 53 | int oif; |
| 54 | |
| 55 | rcu_read_lock(); |
| 56 | oif = l3mdev_fib_oif_rcu(dev); |
| 57 | rcu_read_unlock(); |
| 58 | |
| 59 | return oif; |
| 60 | } |
| 61 | |
| 62 | u32 l3mdev_fib_table_rcu(const struct net_device *dev); |
| 63 | u32 l3mdev_fib_table_by_index(struct net *net, int ifindex); |
| 64 | static inline u32 l3mdev_fib_table(const struct net_device *dev) |
| 65 | { |
| 66 | u32 tb_id; |
| 67 | |
| 68 | rcu_read_lock(); |
| 69 | tb_id = l3mdev_fib_table_rcu(dev); |
| 70 | rcu_read_unlock(); |
| 71 | |
| 72 | return tb_id; |
| 73 | } |
| 74 | |
| 75 | static inline struct rtable *l3mdev_get_rtable(const struct net_device *dev, |
| 76 | const struct flowi4 *fl4) |
| 77 | { |
| 78 | if (netif_is_l3_master(dev) && dev->l3mdev_ops->l3mdev_get_rtable) |
| 79 | return dev->l3mdev_ops->l3mdev_get_rtable(dev, fl4); |
| 80 | |
| 81 | return NULL; |
| 82 | } |
| 83 | |
| 84 | #else |
| 85 | |
| 86 | static inline int l3mdev_master_ifindex_rcu(struct net_device *dev) |
| 87 | { |
| 88 | return 0; |
| 89 | } |
| 90 | static inline int l3mdev_master_ifindex(struct net_device *dev) |
| 91 | { |
| 92 | return 0; |
| 93 | } |
| 94 | |
| 95 | static inline int l3mdev_fib_oif_rcu(struct net_device *dev) |
| 96 | { |
| 97 | return dev ? dev->ifindex : 0; |
| 98 | } |
| 99 | static inline int l3mdev_fib_oif(struct net_device *dev) |
| 100 | { |
| 101 | return dev ? dev->ifindex : 0; |
| 102 | } |
| 103 | |
| 104 | static inline u32 l3mdev_fib_table_rcu(const struct net_device *dev) |
| 105 | { |
| 106 | return 0; |
| 107 | } |
| 108 | static inline u32 l3mdev_fib_table(const struct net_device *dev) |
| 109 | { |
| 110 | return 0; |
| 111 | } |
| 112 | static inline u32 l3mdev_fib_table_by_index(struct net *net, int ifindex) |
| 113 | { |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | static inline struct rtable *l3mdev_get_rtable(const struct net_device *dev, |
| 118 | const struct flowi4 *fl4) |
| 119 | { |
| 120 | return NULL; |
| 121 | } |
| 122 | |
| 123 | #endif |
| 124 | |
| 125 | #endif /* _NET_L3MDEV_H_ */ |