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Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
296 lines
6.1 KiB
C
296 lines
6.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* include/net/l3mdev.h - L3 master device API
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* Copyright (c) 2015 Cumulus Networks
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* Copyright (c) 2015 David Ahern <dsa@cumulusnetworks.com>
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*/
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#ifndef _NET_L3MDEV_H_
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#define _NET_L3MDEV_H_
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#include <net/dst.h>
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#include <net/fib_rules.h>
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/**
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* struct l3mdev_ops - l3mdev operations
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*
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* @l3mdev_fib_table: Get FIB table id to use for lookups
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*
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* @l3mdev_l3_rcv: Hook in L3 receive path
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*
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* @l3mdev_l3_out: Hook in L3 output path
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*
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* @l3mdev_link_scope_lookup: IPv6 lookup for linklocal and mcast destinations
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*/
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struct l3mdev_ops {
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u32 (*l3mdev_fib_table)(const struct net_device *dev);
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struct sk_buff * (*l3mdev_l3_rcv)(struct net_device *dev,
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struct sk_buff *skb, u16 proto);
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struct sk_buff * (*l3mdev_l3_out)(struct net_device *dev,
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struct sock *sk, struct sk_buff *skb,
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u16 proto);
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/* IPv6 ops */
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struct dst_entry * (*l3mdev_link_scope_lookup)(const struct net_device *dev,
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struct flowi6 *fl6);
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};
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#ifdef CONFIG_NET_L3_MASTER_DEV
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int l3mdev_fib_rule_match(struct net *net, struct flowi *fl,
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struct fib_lookup_arg *arg);
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void l3mdev_update_flow(struct net *net, struct flowi *fl);
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int l3mdev_master_ifindex_rcu(const struct net_device *dev);
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static inline int l3mdev_master_ifindex(struct net_device *dev)
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{
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int ifindex;
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rcu_read_lock();
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ifindex = l3mdev_master_ifindex_rcu(dev);
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rcu_read_unlock();
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return ifindex;
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}
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static inline int l3mdev_master_ifindex_by_index(struct net *net, int ifindex)
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{
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struct net_device *dev;
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int rc = 0;
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if (likely(ifindex)) {
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rcu_read_lock();
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dev = dev_get_by_index_rcu(net, ifindex);
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if (dev)
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rc = l3mdev_master_ifindex_rcu(dev);
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rcu_read_unlock();
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}
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return rc;
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}
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static inline
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struct net_device *l3mdev_master_dev_rcu(const struct net_device *_dev)
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{
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/* netdev_master_upper_dev_get_rcu calls
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* list_first_or_null_rcu to walk the upper dev list.
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* list_first_or_null_rcu does not handle a const arg. We aren't
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* making changes, just want the master device from that list so
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* typecast to remove the const
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*/
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struct net_device *dev = (struct net_device *)_dev;
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struct net_device *master;
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if (!dev)
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return NULL;
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if (netif_is_l3_master(dev))
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master = dev;
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else if (netif_is_l3_slave(dev))
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master = netdev_master_upper_dev_get_rcu(dev);
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else
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master = NULL;
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return master;
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}
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int l3mdev_master_upper_ifindex_by_index_rcu(struct net *net, int ifindex);
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static inline
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int l3mdev_master_upper_ifindex_by_index(struct net *net, int ifindex)
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{
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rcu_read_lock();
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ifindex = l3mdev_master_upper_ifindex_by_index_rcu(net, ifindex);
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rcu_read_unlock();
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return ifindex;
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}
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u32 l3mdev_fib_table_rcu(const struct net_device *dev);
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u32 l3mdev_fib_table_by_index(struct net *net, int ifindex);
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static inline u32 l3mdev_fib_table(const struct net_device *dev)
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{
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u32 tb_id;
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rcu_read_lock();
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tb_id = l3mdev_fib_table_rcu(dev);
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rcu_read_unlock();
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return tb_id;
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}
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static inline bool netif_index_is_l3_master(struct net *net, int ifindex)
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{
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struct net_device *dev;
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bool rc = false;
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if (ifindex == 0)
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return false;
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rcu_read_lock();
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dev = dev_get_by_index_rcu(net, ifindex);
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if (dev)
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rc = netif_is_l3_master(dev);
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rcu_read_unlock();
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return rc;
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}
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struct dst_entry *l3mdev_link_scope_lookup(struct net *net, struct flowi6 *fl6);
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static inline
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struct sk_buff *l3mdev_l3_rcv(struct sk_buff *skb, u16 proto)
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{
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struct net_device *master = NULL;
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if (netif_is_l3_slave(skb->dev))
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master = netdev_master_upper_dev_get_rcu(skb->dev);
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else if (netif_is_l3_master(skb->dev) ||
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netif_has_l3_rx_handler(skb->dev))
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master = skb->dev;
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if (master && master->l3mdev_ops->l3mdev_l3_rcv)
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skb = master->l3mdev_ops->l3mdev_l3_rcv(master, skb, proto);
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return skb;
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}
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static inline
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struct sk_buff *l3mdev_ip_rcv(struct sk_buff *skb)
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{
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return l3mdev_l3_rcv(skb, AF_INET);
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}
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static inline
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struct sk_buff *l3mdev_ip6_rcv(struct sk_buff *skb)
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{
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return l3mdev_l3_rcv(skb, AF_INET6);
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}
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static inline
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struct sk_buff *l3mdev_l3_out(struct sock *sk, struct sk_buff *skb, u16 proto)
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{
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struct net_device *dev = skb_dst(skb)->dev;
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if (netif_is_l3_slave(dev)) {
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struct net_device *master;
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master = netdev_master_upper_dev_get_rcu(dev);
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if (master && master->l3mdev_ops->l3mdev_l3_out)
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skb = master->l3mdev_ops->l3mdev_l3_out(master, sk,
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skb, proto);
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}
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return skb;
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}
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static inline
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struct sk_buff *l3mdev_ip_out(struct sock *sk, struct sk_buff *skb)
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{
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return l3mdev_l3_out(sk, skb, AF_INET);
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}
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static inline
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struct sk_buff *l3mdev_ip6_out(struct sock *sk, struct sk_buff *skb)
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{
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return l3mdev_l3_out(sk, skb, AF_INET6);
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}
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#else
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static inline int l3mdev_master_ifindex_rcu(const struct net_device *dev)
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{
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return 0;
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}
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static inline int l3mdev_master_ifindex(struct net_device *dev)
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{
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return 0;
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}
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static inline int l3mdev_master_ifindex_by_index(struct net *net, int ifindex)
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{
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return 0;
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}
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static inline
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int l3mdev_master_upper_ifindex_by_index_rcu(struct net *net, int ifindex)
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{
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return 0;
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}
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static inline
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int l3mdev_master_upper_ifindex_by_index(struct net *net, int ifindex)
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{
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return 0;
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}
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static inline
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struct net_device *l3mdev_master_dev_rcu(const struct net_device *dev)
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{
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return NULL;
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}
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static inline u32 l3mdev_fib_table_rcu(const struct net_device *dev)
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{
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return 0;
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}
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static inline u32 l3mdev_fib_table(const struct net_device *dev)
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{
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return 0;
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}
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static inline u32 l3mdev_fib_table_by_index(struct net *net, int ifindex)
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{
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return 0;
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}
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static inline bool netif_index_is_l3_master(struct net *net, int ifindex)
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{
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return false;
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}
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static inline
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struct dst_entry *l3mdev_link_scope_lookup(struct net *net, struct flowi6 *fl6)
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{
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return NULL;
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}
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static inline
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struct sk_buff *l3mdev_ip_rcv(struct sk_buff *skb)
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{
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return skb;
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}
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static inline
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struct sk_buff *l3mdev_ip6_rcv(struct sk_buff *skb)
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{
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return skb;
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}
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static inline
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struct sk_buff *l3mdev_ip_out(struct sock *sk, struct sk_buff *skb)
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{
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return skb;
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}
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static inline
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struct sk_buff *l3mdev_ip6_out(struct sock *sk, struct sk_buff *skb)
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{
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return skb;
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}
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static inline
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int l3mdev_fib_rule_match(struct net *net, struct flowi *fl,
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struct fib_lookup_arg *arg)
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{
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return 1;
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}
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static inline
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void l3mdev_update_flow(struct net *net, struct flowi *fl)
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{
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}
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#endif
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#endif /* _NET_L3MDEV_H_ */
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