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 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, 21 unsigned change, gfp_t flags); 22 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, 23 gfp_t flags); 24 25 26 /* RTNL is used as a global lock for all changes to network configuration */ 27 extern void rtnl_lock(void); 28 extern void rtnl_unlock(void); 29 extern int rtnl_trylock(void); 30 extern int rtnl_is_locked(void); 31 32 extern wait_queue_head_t netdev_unregistering_wq; 33 extern struct mutex net_mutex; 34 35 #ifdef CONFIG_PROVE_LOCKING 36 extern int lockdep_rtnl_is_held(void); 37 #else 38 static inline int lockdep_rtnl_is_held(void) 39 { 40 return 1; 41 } 42 #endif /* #ifdef CONFIG_PROVE_LOCKING */ 43 44 /** 45 * rcu_dereference_rtnl - rcu_dereference with debug checking 46 * @p: The pointer to read, prior to dereferencing 47 * 48 * Do an rcu_dereference(p), but check caller either holds rcu_read_lock() 49 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference() 50 */ 51 #define rcu_dereference_rtnl(p) \ 52 rcu_dereference_check(p, lockdep_rtnl_is_held()) 53 54 /** 55 * rcu_dereference_bh_rtnl - rcu_dereference_bh with debug checking 56 * @p: The pointer to read, prior to dereference 57 * 58 * Do an rcu_dereference_bh(p), but check caller either holds rcu_read_lock_bh() 59 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference_bh() 60 */ 61 #define rcu_dereference_bh_rtnl(p) \ 62 rcu_dereference_bh_check(p, lockdep_rtnl_is_held()) 63 64 /** 65 * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL 66 * @p: The pointer to read, prior to dereferencing 67 * 68 * Return the value of the specified RCU-protected pointer, but omit 69 * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because 70 * caller holds RTNL. 71 */ 72 #define rtnl_dereference(p) \ 73 rcu_dereference_protected(p, lockdep_rtnl_is_held()) 74 75 static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev) 76 { 77 return rtnl_dereference(dev->ingress_queue); 78 } 79 80 struct netdev_queue *dev_ingress_queue_create(struct net_device *dev); 81 82 #ifdef CONFIG_NET_CLS_ACT 83 void net_inc_ingress_queue(void); 84 void net_dec_ingress_queue(void); 85 #else 86 static inline void net_inc_ingress_queue(void) 87 { 88 } 89 90 static inline void net_dec_ingress_queue(void) 91 { 92 } 93 #endif 94 95 extern void rtnetlink_init(void); 96 extern void __rtnl_unlock(void); 97 98 #define ASSERT_RTNL() do { \ 99 if (unlikely(!rtnl_is_locked())) { \ 100 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \ 101 __FILE__, __LINE__); \ 102 dump_stack(); \ 103 } \ 104 } while(0) 105 106 extern int ndo_dflt_fdb_dump(struct sk_buff *skb, 107 struct netlink_callback *cb, 108 struct net_device *dev, 109 struct net_device *filter_dev, 110 int idx); 111 extern int ndo_dflt_fdb_add(struct ndmsg *ndm, 112 struct nlattr *tb[], 113 struct net_device *dev, 114 const unsigned char *addr, 115 u16 vid, 116 u16 flags); 117 extern int ndo_dflt_fdb_del(struct ndmsg *ndm, 118 struct nlattr *tb[], 119 struct net_device *dev, 120 const unsigned char *addr, 121 u16 vid); 122 123 extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 124 struct net_device *dev, u16 mode, 125 u32 flags, u32 mask, int nlflags); 126 #endif /* __LINUX_RTNETLINK_H */ 127