Gitiles
Code Review Sign In
gerrit-public.fairphone.software / kernel / msm-4.19 / 7943b310001fd7858154bc3af2a78e0dd6bfea03 / . / include / linux / rtnetlink.h
blob: 489dd7bb28ecf2920e545bf65cdb29d64aab9bdd [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1#ifndef __LINUX_RTNETLINK_H
2#define __LINUX_RTNETLINK_H
3
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4
Stephen Hemminger6756ae42006-03-20 22:23:58 -0800[diff] [blame]5#include <linux/mutex.h>
Andy Whitcroft3b42a962010-11-15 06:01:59 +0000[diff] [blame]6#include <linux/netdevice.h>
David Howells607ca462012-10-13 10:46:48 +0100[diff] [blame]7#include <uapi/linux/rtnetlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]8
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800[diff] [blame]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);
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -0800[diff] [blame]11extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
12 u32 group, struct nlmsghdr *nlh, gfp_t flags);
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800[diff] [blame]13extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]14extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
Thomas Grafe3703b32006-11-27 09:27:07 -0800[diff] [blame]15extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
David S. Miller87a50692012-07-10 05:06:14 -0700[diff] [blame]16 u32 id, long expires, u32 error);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]17
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]18extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);
19
Stephen Hemminger6756ae42006-03-20 22:23:58 -0800[diff] [blame]20/* RTNL is used as a global lock for all changes to network configuration */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]21extern void rtnl_lock(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]22extern void rtnl_unlock(void);
Stephen Hemminger6756ae42006-03-20 22:23:58 -0800[diff] [blame]23extern int rtnl_trylock(void);
Patrick McHardyc9c10142008-04-23 22:10:48 -0700[diff] [blame]24extern int rtnl_is_locked(void);
Paul E. McKenneya898def2010-02-22 17:04:49 -0800[diff] [blame]25#ifdef CONFIG_PROVE_LOCKING
26extern int lockdep_rtnl_is_held(void);
27#endif /* #ifdef CONFIG_PROVE_LOCKING */
Stephen Hemminger6756ae42006-03-20 22:23:58 -0800[diff] [blame]28
Eric Dumazeta6e0fc82010-09-08 14:15:32 -0700[diff] [blame]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()
David S. Miller29fa0602010-10-05 00:29:48 -0700[diff] [blame]34 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference()
Eric Dumazeta6e0fc82010-09-08 14:15:32 -0700[diff] [blame]35 */
36#define rcu_dereference_rtnl(p) \
Michal Hockod8bf4ca2011-07-08 14:39:41 +0200[diff] [blame]37 rcu_dereference_check(p, lockdep_rtnl_is_held())
Eric Dumazeta6e0fc82010-09-08 14:15:32 -0700[diff] [blame]38
Eric Dumazet7dff59e2010-09-15 11:07:15 +0000[diff] [blame]39/**
David S. Miller29fa0602010-10-05 00:29:48 -0700[diff] [blame]40 * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
Eric Dumazet7dff59e2010-09-15 11:07:15 +0000[diff] [blame]41 * @p: The pointer to read, prior to dereferencing
42 *
David S. Miller29fa0602010-10-05 00:29:48 -0700[diff] [blame]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.
Eric Dumazet7dff59e2010-09-15 11:07:15 +0000[diff] [blame]46 */
47#define rtnl_dereference(p) \
David S. Miller29fa0602010-10-05 00:29:48 -0700[diff] [blame]48 rcu_dereference_protected(p, lockdep_rtnl_is_held())
Eric Dumazet7dff59e2010-09-15 11:07:15 +0000[diff] [blame]49
Eric Dumazet24824a02010-10-02 06:11:55 +0000[diff] [blame]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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]57extern void rtnetlink_init(void);
Stephen Hemminger6756ae42006-03-20 22:23:58 -0800[diff] [blame]58extern void __rtnl_unlock(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]59
60#define ASSERT_RTNL() do { \
Patrick McHardyc9c10142008-04-23 22:10:48 -0700[diff] [blame]61 if (unlikely(!rtnl_is_locked())) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]62 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
63 __FILE__, __LINE__); \
64 dump_stack(); \
65 } \
66} while(0)
67
John Fastabend77162022012-04-15 06:43:56 +0000[diff] [blame]68extern int ndo_dflt_fdb_dump(struct sk_buff *skb,
69 struct netlink_callback *cb,
70 struct net_device *dev,
71 int idx);
John Fastabend815cccb2012-10-24 08:13:09 +0000[diff] [blame]72
73extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
74 struct net_device *dev, u16 mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]75#endif /* __LINUX_RTNETLINK_H */