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 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);
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
dev_ingress_queue(struct net_device * dev)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