1 #ifndef __LINUX_RTNETLINK_H
2 #define __LINUX_RTNETLINK_H
5 #include <linux/mutex.h>
6 #include <linux/netdevice.h>
7 #include <uapi/linux/rtnetlink.h>
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
);
18 extern void rtmsg_ifinfo(int type
, struct net_device
*dev
, unsigned change
);
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 */
30 * rcu_dereference_rtnl - rcu_dereference with debug checking
31 * @p: The pointer to read, prior to dereferencing
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()
36 #define rcu_dereference_rtnl(p) \
37 rcu_dereference_check(p, lockdep_rtnl_is_held())
40 * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
41 * @p: The pointer to read, prior to dereferencing
43 * Return the value of the specified RCU-protected pointer, but omit
44 * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because
47 #define rtnl_dereference(p) \
48 rcu_dereference_protected(p, lockdep_rtnl_is_held())
50 static inline struct netdev_queue
*dev_ingress_queue(struct net_device
*dev
)
52 return rtnl_dereference(dev
->ingress_queue
);
55 extern struct netdev_queue
*dev_ingress_queue_create(struct net_device
*dev
);
57 extern void rtnetlink_init(void);
58 extern void __rtnl_unlock(void);
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__); \
68 extern int ndo_dflt_fdb_dump(struct sk_buff
*skb
,
69 struct netlink_callback
*cb
,
70 struct net_device
*dev
,
72 #endif /* __LINUX_RTNETLINK_H */