projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1b69c6d0 DA |
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 | ||
| 9478d12d DA |
84 | static inline bool netif_index_is_l3_master(struct net *net, int ifindex) |
| 85 | { | |
| 86 | struct net_device *dev; | |
| 87 | bool rc = false; | |
| 88 | ||
| 89 | if (ifindex == 0) | |
| 90 | return false; | |
| 91 | ||
| 92 | rcu_read_lock(); | |
| 93 | ||
| 94 | dev = dev_get_by_index_rcu(net, ifindex); | |
| 95 | if (dev) | |
| 96 | rc = netif_is_l3_master(dev); | |
| 97 | ||
| 98 | rcu_read_unlock(); | |
| 99 | ||
| 100 | return rc; | |
| 101 | } | |
| 102 | ||
| 1b69c6d0 DA |
103 | #else |
| 104 | ||
| 105 | static inline int l3mdev_master_ifindex_rcu(struct net_device *dev) | |
| 106 | { | |
| 107 | return 0; | |
| 108 | } | |
| 109 | static inline int l3mdev_master_ifindex(struct net_device *dev) | |
| 110 | { | |
| 111 | return 0; | |
| 112 | } | |
| 113 | ||
| 114 | static inline int l3mdev_fib_oif_rcu(struct net_device *dev) | |
| 115 | { | |
| 116 | return dev ? dev->ifindex : 0; | |
| 117 | } | |
| 118 | static inline int l3mdev_fib_oif(struct net_device *dev) | |
| 119 | { | |
| 120 | return dev ? dev->ifindex : 0; | |
| 121 | } | |
| 122 | ||
| 123 | static inline u32 l3mdev_fib_table_rcu(const struct net_device *dev) | |
| 124 | { | |
| 125 | return 0; | |
| 126 | } | |
| 127 | static inline u32 l3mdev_fib_table(const struct net_device *dev) | |
| 128 | { | |
| 129 | return 0; | |
| 130 | } | |
| 131 | static inline u32 l3mdev_fib_table_by_index(struct net *net, int ifindex) | |
| 132 | { | |
| 133 | return 0; | |
| 134 | } | |
| 135 | ||
| 136 | static inline struct rtable *l3mdev_get_rtable(const struct net_device *dev, | |
| 137 | const struct flowi4 *fl4) | |
| 138 | { | |
| 139 | return NULL; | |
| 140 | } | |
| 141 | ||
| 9478d12d DA |
142 | static inline bool netif_index_is_l3_master(struct net *net, int ifindex) |
| 143 | { | |
| 144 | return false; | |
| 145 | } | |
| 146 | ||
| 1b69c6d0 DA |
147 | #endif |
| 148 | ||
| 149 | #endif /* _NET_L3MDEV_H_ */ |