diff options
Diffstat (limited to 'include/net/vrf.h')
| -rw-r--r-- | include/net/vrf.h | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/include/net/vrf.h b/include/net/vrf.h new file mode 100644 index 000000000000..593e6094ddd4 --- /dev/null +++ b/include/net/vrf.h @@ -0,0 +1,178 @@ +/* + * include/net/net_vrf.h - adds vrf dev structure definitions + * Copyright (c) 2015 Cumulus Networks + * + * 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. + */ + +#ifndef __LINUX_NET_VRF_H +#define __LINUX_NET_VRF_H + +struct net_vrf_dev { + struct rcu_head rcu; + int ifindex; /* ifindex of master dev */ + u32 tb_id; /* table id for VRF */ +}; + +struct slave { + struct list_head list; + struct net_device *dev; +}; + +struct slave_queue { + struct list_head all_slaves; +}; + +struct net_vrf { + struct slave_queue queue; + struct rtable *rth; + u32 tb_id; +}; + + +#if IS_ENABLED(CONFIG_NET_VRF) +/* called with rcu_read_lock() */ +static inline int vrf_master_ifindex_rcu(const struct net_device *dev) +{ + struct net_vrf_dev *vrf_ptr; + int ifindex = 0; + + if (!dev) + return 0; + + if (netif_is_vrf(dev)) { + ifindex = dev->ifindex; + } else { + vrf_ptr = rcu_dereference(dev->vrf_ptr); + if (vrf_ptr) + ifindex = vrf_ptr->ifindex; + } + + return ifindex; +} + +static inline int vrf_master_ifindex(const struct net_device *dev) +{ + int ifindex; + + rcu_read_lock(); + ifindex = vrf_master_ifindex_rcu(dev); + rcu_read_unlock(); + + return ifindex; +} + +/* called with rcu_read_lock */ +static inline u32 vrf_dev_table_rcu(const struct net_device *dev) +{ + u32 tb_id = 0; + + if (dev) { + struct net_vrf_dev *vrf_ptr; + + vrf_ptr = rcu_dereference(dev->vrf_ptr); + if (vrf_ptr) + tb_id = vrf_ptr->tb_id; + } + return tb_id; +} + +static inline u32 vrf_dev_table(const struct net_device *dev) +{ + u32 tb_id; + + rcu_read_lock(); + tb_id = vrf_dev_table_rcu(dev); + rcu_read_unlock(); + + return tb_id; +} + +static inline u32 vrf_dev_table_ifindex(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 = vrf_dev_table_rcu(dev); + + rcu_read_unlock(); + + return tb_id; +} + +/* called with rtnl */ +static inline u32 vrf_dev_table_rtnl(const struct net_device *dev) +{ + u32 tb_id = 0; + + if (dev) { + struct net_vrf_dev *vrf_ptr; + + vrf_ptr = rtnl_dereference(dev->vrf_ptr); + if (vrf_ptr) + tb_id = vrf_ptr->tb_id; + } + return tb_id; +} + +/* caller has already checked netif_is_vrf(dev) */ +static inline struct rtable *vrf_dev_get_rth(const struct net_device *dev) +{ + struct rtable *rth = ERR_PTR(-ENETUNREACH); + struct net_vrf *vrf = netdev_priv(dev); + + if (vrf) { + rth = vrf->rth; + atomic_inc(&rth->dst.__refcnt); + } + return rth; +} + +#else +static inline int vrf_master_ifindex_rcu(const struct net_device *dev) +{ + return 0; +} + +static inline int vrf_master_ifindex(const struct net_device *dev) +{ + return 0; +} + +static inline u32 vrf_dev_table_rcu(const struct net_device *dev) +{ + return 0; +} + +static inline u32 vrf_dev_table(const struct net_device *dev) +{ + return 0; +} + +static inline u32 vrf_dev_table_ifindex(struct net *net, int ifindex) +{ + return 0; +} + +static inline u32 vrf_dev_table_rtnl(const struct net_device *dev) +{ + return 0; +} + +static inline struct rtable *vrf_dev_get_rth(const struct net_device *dev) +{ + return ERR_PTR(-ENETUNREACH); +} +#endif + +#endif /* __LINUX_NET_VRF_H */ |