rtnetlink.h 4.1 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3 4
#ifndef __LINUX_RTNETLINK_H
#define __LINUX_RTNETLINK_H


5
#include <linux/mutex.h>
6
#include <linux/netdevice.h>
7
#include <linux/wait.h>
8
#include <uapi/linux/rtnetlink.h>
L
Linus Torvalds 已提交
9

10 11
extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
12 13
extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
			u32 group, struct nlmsghdr *nlh, gfp_t flags);
14
extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
L
Linus Torvalds 已提交
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);
L
Linus Torvalds 已提交
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 22
				       unsigned change, u32 event,
				       gfp_t flags);
23 24 25
void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev,
		       gfp_t flags);

L
Linus Torvalds 已提交
26

27
/* RTNL is used as a global lock for all changes to network configuration  */
L
Linus Torvalds 已提交
28 29
extern void rtnl_lock(void);
extern void rtnl_unlock(void);
30
extern int rtnl_trylock(void);
31
extern int rtnl_is_locked(void);
32 33 34 35

extern wait_queue_head_t netdev_unregistering_wq;
extern struct mutex net_mutex;

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 47 48 49
/**
 * rcu_dereference_rtnl - rcu_dereference with debug checking
 * @p: The pointer to read, prior to dereferencing
 *
 * Do an rcu_dereference(p), but check caller either holds rcu_read_lock()
D
David S. Miller 已提交
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

J
John Fastabend 已提交
55 56 57 58 59 60 61 62 63 64
/**
 * rcu_dereference_bh_rtnl - rcu_dereference_bh with debug checking
 * @p: The pointer to read, prior to dereference
 *
 * Do an rcu_dereference_bh(p), but check caller either holds rcu_read_lock_bh()
 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference_bh()
 */
#define rcu_dereference_bh_rtnl(p)				\
	rcu_dereference_bh_check(p, lockdep_rtnl_is_held())

E
Eric Dumazet 已提交
65
/**
D
David S. Miller 已提交
66
 * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
E
Eric Dumazet 已提交
67 68
 * @p: The pointer to read, prior to dereferencing
 *
D
David S. Miller 已提交
69 70 71
 * Return the value of the specified RCU-protected pointer, but omit
 * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because
 * caller holds RTNL.
E
Eric Dumazet 已提交
72 73
 */
#define rtnl_dereference(p)					\
D
David S. Miller 已提交
74
	rcu_dereference_protected(p, lockdep_rtnl_is_held())
E
Eric Dumazet 已提交
75

76 77 78 79 80
static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
{
	return rtnl_dereference(dev->ingress_queue);
}

81 82
struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);

83
#ifdef CONFIG_NET_INGRESS
84 85 86
void net_inc_ingress_queue(void);
void net_dec_ingress_queue(void);
#endif
87

D
Daniel Borkmann 已提交
88 89 90 91 92
#ifdef CONFIG_NET_EGRESS
void net_inc_egress_queue(void);
void net_dec_egress_queue(void);
#endif

93 94 95
void rtnetlink_init(void);
void __rtnl_unlock(void);
void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail);
L
Linus Torvalds 已提交
96 97

#define ASSERT_RTNL() do { \
98
	if (unlikely(!rtnl_is_locked())) { \
L
Linus Torvalds 已提交
99 100 101 102 103 104
		printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
		       __FILE__,  __LINE__); \
		dump_stack(); \
	} \
} while(0)

105 106 107
extern int ndo_dflt_fdb_dump(struct sk_buff *skb,
			     struct netlink_callback *cb,
			     struct net_device *dev,
108
			     struct net_device *filter_dev,
109
			     int *idx);
110 111 112 113
extern int ndo_dflt_fdb_add(struct ndmsg *ndm,
			    struct nlattr *tb[],
			    struct net_device *dev,
			    const unsigned char *addr,
114 115
			    u16 vid,
			    u16 flags);
116 117 118
extern int ndo_dflt_fdb_del(struct ndmsg *ndm,
			    struct nlattr *tb[],
			    struct net_device *dev,
119 120
			    const unsigned char *addr,
			    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,
124 125 126 127 128
				   u32 flags, u32 mask, int nlflags,
				   u32 filter_mask,
				   int (*vlan_fill)(struct sk_buff *skb,
						    struct net_device *dev,
						    u32 filter_mask));
L
Linus Torvalds 已提交
129
#endif	/* __LINUX_RTNETLINK_H */