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
10extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
11extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
12extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
13			u32 group, struct nlmsghdr *nlh, gfp_t flags);
14extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
15extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
16extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
17			      u32 id, long expires, u32 error);
18
19void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change, gfp_t flags);
20struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
21				       unsigned change, gfp_t flags);
22void 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  */
27extern void rtnl_lock(void);
28extern void rtnl_unlock(void);
29extern int rtnl_trylock(void);
30extern int rtnl_is_locked(void);
31
32extern wait_queue_head_t netdev_unregistering_wq;
33extern struct mutex net_mutex;
34
35#ifdef CONFIG_PROVE_LOCKING
36extern int lockdep_rtnl_is_held(void);
37#else
38static 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
75static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
76{
77	return rtnl_dereference(dev->ingress_queue);
78}
79
80struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
81
82#ifdef CONFIG_NET_CLS_ACT
83void net_inc_ingress_queue(void);
84void net_dec_ingress_queue(void);
85#else
86static inline void net_inc_ingress_queue(void)
87{
88}
89
90static inline void net_dec_ingress_queue(void)
91{
92}
93#endif
94
95extern void rtnetlink_init(void);
96extern 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
106extern 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);
111extern 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);
117extern 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
123extern 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