Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
9extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
10extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
11extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
12 u32 group, struct nlmsghdr *nlh, gfp_t flags);
13extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
14extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
15extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
16 u32 id, long expires, u32 error);
17
18extern 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 */
21extern void rtnl_lock(void);
22extern void rtnl_unlock(void);
23extern int rtnl_trylock(void);
24extern int rtnl_is_locked(void);
25#ifdef CONFIG_PROVE_LOCKING
26extern 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
50static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
51{
52 return rtnl_dereference(dev->ingress_queue);
53}
54
55extern struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
56
57extern void rtnetlink_init(void);
58extern 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
68extern int ndo_dflt_fdb_dump(struct sk_buff *skb,
69 struct netlink_callback *cb,
70 struct net_device *dev,
71 int idx);
72
73extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
74 struct net_device *dev, u16 mode);
75#endif /* __LINUX_RTNETLINK_H */