1 #ifndef __LINUX_RTNETLINK_H 2 #define __LINUX_RTNETLINK_H 3 4 5 #include <linux/mutex.h> 6 #include <linux/netdevice.h> 7 #include <linux/wait.h> 8 #include <uapi/linux/rtnetlink.h> 9 10 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo); 11 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid); 12 extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, 13 u32 group, struct nlmsghdr *nlh, gfp_t flags); 14 extern void rtnl_set_sk_err(struct net *net, u32 group, int error); 15 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics); 16 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, 17 u32 id, long expires, u32 error); 18 19 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change, gfp_t flags); 20 21 /* RTNL is used as a global lock for all changes to network configuration */ 22 extern void rtnl_lock(void); 23 extern void rtnl_unlock(void); 24 extern int rtnl_trylock(void); 25 extern int rtnl_is_locked(void); 26 27 extern wait_queue_head_t netdev_unregistering_wq; 28 extern struct mutex net_mutex; 29 30 #ifdef CONFIG_PROVE_LOCKING 31 extern int lockdep_rtnl_is_held(void); 32 #else 33 static inline int lockdep_rtnl_is_held(void) 34 { 35 return 1; 36 } 37 #endif /* #ifdef CONFIG_PROVE_LOCKING */ 38 39 /** 40 * rcu_dereference_rtnl - rcu_dereference with debug checking 41 * @p: The pointer to read, prior to dereferencing 42 * 43 * Do an rcu_dereference(p), but check caller either holds rcu_read_lock() 44 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference() 45 */ 46 #define rcu_dereference_rtnl(p) \ 47 rcu_dereference_check(p, lockdep_rtnl_is_held()) 48 49 /** 50 * rcu_dereference_bh_rtnl - rcu_dereference_bh with debug checking 51 * @p: The pointer to read, prior to dereference 52 * 53 * Do an rcu_dereference_bh(p), but check caller either holds rcu_read_lock_bh() 54 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference_bh() 55 */ 56 #define rcu_dereference_bh_rtnl(p) \ 57 rcu_dereference_bh_check(p, lockdep_rtnl_is_held()) 58 59 /** 60 * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL 61 * @p: The pointer to read, prior to dereferencing 62 * 63 * Return the value of the specified RCU-protected pointer, but omit 64 * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because 65 * caller holds RTNL. 66 */ 67 #define rtnl_dereference(p) \ 68 rcu_dereference_protected(p, lockdep_rtnl_is_held()) 69 70 static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev) 71 { 72 return rtnl_dereference(dev->ingress_queue); 73 } 74 75 extern struct netdev_queue *dev_ingress_queue_create(struct net_device *dev); 76 77 extern void rtnetlink_init(void); 78 extern void __rtnl_unlock(void); 79 80 #define ASSERT_RTNL() do { \ 81 if (unlikely(!rtnl_is_locked())) { \ 82 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \ 83 __FILE__, __LINE__); \ 84 dump_stack(); \ 85 } \ 86 } while(0) 87 88 extern int ndo_dflt_fdb_dump(struct sk_buff *skb, 89 struct netlink_callback *cb, 90 struct net_device *dev, 91 struct net_device *filter_dev, 92 int idx); 93 extern int ndo_dflt_fdb_add(struct ndmsg *ndm, 94 struct nlattr *tb[], 95 struct net_device *dev, 96 const unsigned char *addr, 97 u16 flags); 98 extern int ndo_dflt_fdb_del(struct ndmsg *ndm, 99 struct nlattr *tb[], 100 struct net_device *dev, 101 const unsigned char *addr); 102 103 extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 104 struct net_device *dev, u16 mode); 105 #endif /* __LINUX_RTNETLINK_H */ 106