1 #ifndef __LINUX_RTNETLINK_H 2 #define __LINUX_RTNETLINK_H 3 4 5 #include <linux/mutex.h> 6 #include <linux/netdevice.h> 7 #include <uapi/linux/rtnetlink.h> 8 9 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo); 10 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid); 11 extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, 12 u32 group, struct nlmsghdr *nlh, gfp_t flags); 13 extern void rtnl_set_sk_err(struct net *net, u32 group, int error); 14 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics); 15 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, 16 u32 id, long expires, u32 error); 17 18 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change, gfp_t flags); 19 20 /* RTNL is used as a global lock for all changes to network configuration */ 21 extern void rtnl_lock(void); 22 extern void rtnl_unlock(void); 23 extern int rtnl_trylock(void); 24 extern int rtnl_is_locked(void); 25 #ifdef CONFIG_PROVE_LOCKING 26 extern int lockdep_rtnl_is_held(void); 27 #endif /* #ifdef CONFIG_PROVE_LOCKING */ 28 29 /** 30 * rcu_dereference_rtnl - rcu_dereference with debug checking 31 * @p: The pointer to read, prior to dereferencing 32 * 33 * Do an rcu_dereference(p), but check caller either holds rcu_read_lock() 34 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference() 35 */ 36 #define rcu_dereference_rtnl(p) \ 37 rcu_dereference_check(p, lockdep_rtnl_is_held()) 38 39 /** 40 * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL 41 * @p: The pointer to read, prior to dereferencing 42 * 43 * Return the value of the specified RCU-protected pointer, but omit 44 * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because 45 * caller holds RTNL. 46 */ 47 #define rtnl_dereference(p) \ 48 rcu_dereference_protected(p, lockdep_rtnl_is_held()) 49 50 static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev) 51 { 52 return rtnl_dereference(dev->ingress_queue); 53 } 54 55 extern struct netdev_queue *dev_ingress_queue_create(struct net_device *dev); 56 57 extern void rtnetlink_init(void); 58 extern void __rtnl_unlock(void); 59 60 #define ASSERT_RTNL() do { \ 61 if (unlikely(!rtnl_is_locked())) { \ 62 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \ 63 __FILE__, __LINE__); \ 64 dump_stack(); \ 65 } \ 66 } while(0) 67 68 extern int ndo_dflt_fdb_dump(struct sk_buff *skb, 69 struct netlink_callback *cb, 70 struct net_device *dev, 71 int idx); 72 extern int ndo_dflt_fdb_add(struct ndmsg *ndm, 73 struct nlattr *tb[], 74 struct net_device *dev, 75 const unsigned char *addr, 76 u16 flags); 77 extern int ndo_dflt_fdb_del(struct ndmsg *ndm, 78 struct nlattr *tb[], 79 struct net_device *dev, 80 const unsigned char *addr); 81 82 extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 83 struct net_device *dev, u16 mode); 84 #endif /* __LINUX_RTNETLINK_H */ 85