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
lockdep_rtnl_is_held(void)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
dev_ingress_queue(struct net_device * dev)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
net_inc_ingress_queue(void)86 static inline void net_inc_ingress_queue(void)
87 {
88 }
89
net_dec_ingress_queue(void)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