Something went wrong. Try again.
(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Something went wrong. Try again.
C
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365/* SPDX-License-Identifier: GPL-2.0-or-later *//* * include/net/l3mdev.h - L3 master device API * Copyright (c) 2015 Cumulus Networks * Copyright (c) 2015 David Ahern <dsa@cumulusnetworks.com> */#ifndef _NET_L3MDEV_H_#define _NET_L3MDEV_H_
#include <net/dst.h>#include <net/fib_rules.h>
enum l3mdev_type { L3MDEV_TYPE_UNSPEC, L3MDEV_TYPE_VRF, __L3MDEV_TYPE_MAX};
#define L3MDEV_TYPE_MAX (__L3MDEV_TYPE_MAX - 1)
typedef int (*lookup_by_table_id_t)(struct net *net, u32 table_d);
/** * struct l3mdev_ops - l3mdev operations * * @l3mdev_fib_table: Get FIB table id to use for lookups * * @l3mdev_l3_rcv: Hook in L3 receive path * * @l3mdev_l3_out: Hook in L3 output path * * @l3mdev_link_scope_lookup: IPv6 lookup for linklocal and mcast destinations */
struct l3mdev_ops { u32 (*l3mdev_fib_table)(const struct net_device *dev); struct sk_buff * (*l3mdev_l3_rcv)(struct net_device *dev, struct sk_buff *skb, u16 proto); struct sk_buff * (*l3mdev_l3_out)(struct net_device *dev, struct sock *sk, struct sk_buff *skb, u16 proto);
/* IPv6 ops */ struct dst_entry * (*l3mdev_link_scope_lookup)(const struct net_device *dev, struct flowi6 *fl6);};
#ifdef CONFIG_NET_L3_MASTER_DEV
int l3mdev_table_lookup_register(enum l3mdev_type l3type, lookup_by_table_id_t fn);
void l3mdev_table_lookup_unregister(enum l3mdev_type l3type, lookup_by_table_id_t fn);
int l3mdev_ifindex_lookup_by_table_id(enum l3mdev_type l3type, struct net *net, u32 table_id);
int l3mdev_fib_rule_match(struct net *net, struct flowi *fl, struct fib_lookup_arg *arg);
static inlinebool l3mdev_fib_rule_iif_match(const struct flowi *fl, int iifindex){ return !(fl->flowi_flags & FLOWI_FLAG_L3MDEV_OIF) && fl->flowi_l3mdev == iifindex;}
static inlinebool l3mdev_fib_rule_oif_match(const struct flowi *fl, int oifindex){ return fl->flowi_flags & FLOWI_FLAG_L3MDEV_OIF && fl->flowi_l3mdev == oifindex;}
void l3mdev_update_flow(struct net *net, struct flowi *fl);
int l3mdev_master_ifindex_rcu(const struct net_device *dev);static inline int l3mdev_master_ifindex(struct net_device *dev){ int ifindex;
rcu_read_lock(); ifindex = l3mdev_master_ifindex_rcu(dev); rcu_read_unlock();
return ifindex;}
static inline int l3mdev_master_ifindex_by_index(struct net *net, int ifindex){ struct net_device *dev; int rc = 0;
if (ifindex) { rcu_read_lock();
dev = dev_get_by_index_rcu(net, ifindex); if (dev) rc = l3mdev_master_ifindex_rcu(dev);
rcu_read_unlock(); }
return rc;}
static inlinestruct net_device *l3mdev_master_dev_rcu(const struct net_device *_dev){ /* netdev_master_upper_dev_get_rcu calls * list_first_or_null_rcu to walk the upper dev list. * list_first_or_null_rcu does not handle a const arg. We aren't * making changes, just want the master device from that list so * typecast to remove the const */ struct net_device *dev = (struct net_device *)_dev; struct net_device *master;
if (!dev) return NULL;
if (netif_is_l3_master(dev)) master = dev; else if (netif_is_l3_slave(dev)) master = netdev_master_upper_dev_get_rcu(dev); else master = NULL;
return master;}
int l3mdev_master_upper_ifindex_by_index_rcu(struct net *net, int ifindex);static inlineint l3mdev_master_upper_ifindex_by_index(struct net *net, int ifindex){ rcu_read_lock(); ifindex = l3mdev_master_upper_ifindex_by_index_rcu(net, ifindex); rcu_read_unlock();
return ifindex;}
u32 l3mdev_fib_table_rcu(const struct net_device *dev);u32 l3mdev_fib_table_by_index(struct net *net, int ifindex);static inline u32 l3mdev_fib_table(const struct net_device *dev){ u32 tb_id;
rcu_read_lock(); tb_id = l3mdev_fib_table_rcu(dev); rcu_read_unlock();
return tb_id;}
static inline bool netif_index_is_l3_master(struct net *net, int ifindex){ struct net_device *dev; bool rc = false;
if (ifindex == 0) return false;
rcu_read_lock();
dev = dev_get_by_index_rcu(net, ifindex); if (dev) rc = netif_is_l3_master(dev);
rcu_read_unlock();
return rc;}
struct dst_entry *l3mdev_link_scope_lookup(struct net *net, struct flowi6 *fl6);
static inlinestruct sk_buff *l3mdev_l3_rcv(struct sk_buff *skb, u16 proto){ struct net_device *master = NULL;
if (netif_is_l3_slave(skb->dev)) master = netdev_master_upper_dev_get_rcu(skb->dev); else if (netif_is_l3_master(skb->dev) || netif_has_l3_rx_handler(skb->dev)) master = skb->dev;
if (master && master->l3mdev_ops->l3mdev_l3_rcv) skb = master->l3mdev_ops->l3mdev_l3_rcv(master, skb, proto);
return skb;}
static inlinestruct sk_buff *l3mdev_ip_rcv(struct sk_buff *skb){ return l3mdev_l3_rcv(skb, AF_INET);}
static inlinestruct sk_buff *l3mdev_ip6_rcv(struct sk_buff *skb){ return l3mdev_l3_rcv(skb, AF_INET6);}
static inlinestruct sk_buff *l3mdev_l3_out(struct sock *sk, struct sk_buff *skb, u16 proto){ struct net_device *dev;
rcu_read_lock(); dev = skb_dst_dev_rcu(skb); if (netif_is_l3_slave(dev)) { struct net_device *master;
master = netdev_master_upper_dev_get_rcu(dev); if (master && master->l3mdev_ops->l3mdev_l3_out) skb = master->l3mdev_ops->l3mdev_l3_out(master, sk, skb, proto); } rcu_read_unlock();
return skb;}
static inlinestruct sk_buff *l3mdev_ip_out(struct sock *sk, struct sk_buff *skb){ return l3mdev_l3_out(sk, skb, AF_INET);}
static inlinestruct sk_buff *l3mdev_ip6_out(struct sock *sk, struct sk_buff *skb){ return l3mdev_l3_out(sk, skb, AF_INET6);}#else
static inline int l3mdev_master_ifindex_rcu(const struct net_device *dev){ return 0;}static inline int l3mdev_master_ifindex(struct net_device *dev){ return 0;}
static inline int l3mdev_master_ifindex_by_index(struct net *net, int ifindex){ return 0;}
static inlineint l3mdev_master_upper_ifindex_by_index_rcu(struct net *net, int ifindex){ return 0;}static inlineint l3mdev_master_upper_ifindex_by_index(struct net *net, int ifindex){ return 0;}
static inlinestruct net_device *l3mdev_master_dev_rcu(const struct net_device *dev){ return NULL;}
static inline u32 l3mdev_fib_table_rcu(const struct net_device *dev){ return 0;}static inline u32 l3mdev_fib_table(const struct net_device *dev){ return 0;}static inline u32 l3mdev_fib_table_by_index(struct net *net, int ifindex){ return 0;}
static inline bool netif_index_is_l3_master(struct net *net, int ifindex){ return false;}
static inlinestruct dst_entry *l3mdev_link_scope_lookup(struct net *net, struct flowi6 *fl6){ return NULL;}
static inlinestruct sk_buff *l3mdev_ip_rcv(struct sk_buff *skb){ return skb;}
static inlinestruct sk_buff *l3mdev_ip6_rcv(struct sk_buff *skb){ return skb;}
static inlinestruct sk_buff *l3mdev_ip_out(struct sock *sk, struct sk_buff *skb){ return skb;}
static inlinestruct sk_buff *l3mdev_ip6_out(struct sock *sk, struct sk_buff *skb){ return skb;}
static inlineint l3mdev_table_lookup_register(enum l3mdev_type l3type, lookup_by_table_id_t fn){ return -EOPNOTSUPP;}
static inlinevoid l3mdev_table_lookup_unregister(enum l3mdev_type l3type, lookup_by_table_id_t fn){}
static inlineint l3mdev_ifindex_lookup_by_table_id(enum l3mdev_type l3type, struct net *net, u32 table_id){ return -ENODEV;}
static inlineint l3mdev_fib_rule_match(struct net *net, struct flowi *fl, struct fib_lookup_arg *arg){ return 1;}
static inlinebool l3mdev_fib_rule_iif_match(const struct flowi *fl, int iifindex){ return false;}
static inlinebool l3mdev_fib_rule_oif_match(const struct flowi *fl, int oifindex){ return false;}
static inlinevoid l3mdev_update_flow(struct net *net, struct flowi *fl){}#endif
#endif /* _NET_L3MDEV_H_ */