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, u32 event, 22 gfp_t flags); 23 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, 24 gfp_t flags); 25 26 27 /* RTNL is used as a global lock for all changes to network configuration */ 28 extern void rtnl_lock(void); 29 extern void rtnl_unlock(void); 30 extern int rtnl_trylock(void); 31 extern int rtnl_is_locked(void); 32 33 extern wait_queue_head_t netdev_unregistering_wq; 34 extern struct mutex net_mutex; 35 36 #ifdef CONFIG_PROVE_LOCKING 37 extern bool lockdep_rtnl_is_held(void); 38 #else 39 static inline bool lockdep_rtnl_is_held(void) 40 { 41 return true; 42 } 43 #endif /* #ifdef CONFIG_PROVE_LOCKING */ 44 45 /** 46 * rcu_dereference_rtnl - rcu_dereference with debug checking 47 * @p: The pointer to read, prior to dereferencing 48 * 49 * Do an rcu_dereference(p), but check caller either holds rcu_read_lock() 50 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference() 51 */ 52 #define rcu_dereference_rtnl(p) \ 53 rcu_dereference_check(p, lockdep_rtnl_is_held()) 54 55 /** 56 * rcu_dereference_bh_rtnl - rcu_dereference_bh with debug checking 57 * @p: The pointer to read, prior to dereference 58 * 59 * Do an rcu_dereference_bh(p), but check caller either holds rcu_read_lock_bh() 60 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference_bh() 61 */ 62 #define rcu_dereference_bh_rtnl(p) \ 63 rcu_dereference_bh_check(p, lockdep_rtnl_is_held()) 64 65 /** 66 * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL 67 * @p: The pointer to read, prior to dereferencing 68 * 69 * Return the value of the specified RCU-protected pointer, but omit 70 * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because 71 * caller holds RTNL. 72 */ 73 #define rtnl_dereference(p) \ 74 rcu_dereference_protected(p, lockdep_rtnl_is_held()) 75 76 static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev) 77 { 78 return rtnl_dereference(dev->ingress_queue); 79 } 80 81 struct netdev_queue *dev_ingress_queue_create(struct net_device *dev); 82 83 #ifdef CONFIG_NET_INGRESS 84 void net_inc_ingress_queue(void); 85 void net_dec_ingress_queue(void); 86 #endif 87 88 #ifdef CONFIG_NET_EGRESS 89 void net_inc_egress_queue(void); 90 void net_dec_egress_queue(void); 91 #endif 92 93 void rtnetlink_init(void); 94 void __rtnl_unlock(void); 95 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail); 96 97 #define ASSERT_RTNL() do { \ 98 if (unlikely(!rtnl_is_locked())) { \ 99 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \ 100 __FILE__, __LINE__); \ 101 dump_stack(); \ 102 } \ 103 } while(0) 104 105 extern int ndo_dflt_fdb_dump(struct sk_buff *skb, 106 struct netlink_callback *cb, 107 struct net_device *dev, 108 struct net_device *filter_dev, 109 int *idx); 110 extern int ndo_dflt_fdb_add(struct ndmsg *ndm, 111 struct nlattr *tb[], 112 struct net_device *dev, 113 const unsigned char *addr, 114 u16 vid, 115 u16 flags); 116 extern int ndo_dflt_fdb_del(struct ndmsg *ndm, 117 struct nlattr *tb[], 118 struct net_device *dev, 119 const unsigned char *addr, 120 u16 vid); 121 122 extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 123 struct net_device *dev, u16 mode, 124 u32 flags, u32 mask, int nlflags, 125 u32 filter_mask, 126 int (*vlan_fill)(struct sk_buff *skb, 127 struct net_device *dev, 128 u32 filter_mask)); 129 #endif /* __LINUX_RTNETLINK_H */ 130