Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef __LINUX_RTNETLINK_H |
| 2 | #define __LINUX_RTNETLINK_H |
| 3 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | |
Stephen Hemminger | 6756ae4 | 2006-03-20 22:23:58 -0800 | [diff] [blame] | 5 | #include <linux/mutex.h> |
Andy Whitcroft | 3b42a96 | 2010-11-15 06:01:59 +0000 | [diff] [blame] | 6 | #include <linux/netdevice.h> |
Cong Wang | 200b916 | 2014-05-12 15:11:20 -0700 | [diff] [blame] | 7 | #include <linux/wait.h> |
David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 8 | #include <uapi/linux/rtnetlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | |
Denis V. Lunev | 97c53ca | 2007-11-19 22:26:51 -0800 | [diff] [blame] | 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); |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 12 | extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, |
| 13 | u32 group, struct nlmsghdr *nlh, gfp_t flags); |
Denis V. Lunev | 97c53ca | 2007-11-19 22:26:51 -0800 | [diff] [blame] | 14 | extern void rtnl_set_sk_err(struct net *net, u32 group, int error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics); |
Thomas Graf | e3703b3 | 2006-11-27 09:27:07 -0800 | [diff] [blame] | 16 | extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, |
David S. Miller | 87a5069 | 2012-07-10 05:06:14 -0700 | [diff] [blame] | 17 | u32 id, long expires, u32 error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | |
Alexei Starovoitov | 7f29405 | 2013-10-23 16:02:42 -0700 | [diff] [blame] | 19 | void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change, gfp_t flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | |
Stephen Hemminger | 6756ae4 | 2006-03-20 22:23:58 -0800 | [diff] [blame] | 21 | /* RTNL is used as a global lock for all changes to network configuration */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | extern void rtnl_lock(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | extern void rtnl_unlock(void); |
Stephen Hemminger | 6756ae4 | 2006-03-20 22:23:58 -0800 | [diff] [blame] | 24 | extern int rtnl_trylock(void); |
Patrick McHardy | c9c1014 | 2008-04-23 22:10:48 -0700 | [diff] [blame] | 25 | extern int rtnl_is_locked(void); |
Cong Wang | 200b916 | 2014-05-12 15:11:20 -0700 | [diff] [blame] | 26 | |
| 27 | extern wait_queue_head_t netdev_unregistering_wq; |
| 28 | extern struct mutex net_mutex; |
| 29 | |
Paul E. McKenney | a898def | 2010-02-22 17:04:49 -0800 | [diff] [blame] | 30 | #ifdef CONFIG_PROVE_LOCKING |
| 31 | extern int lockdep_rtnl_is_held(void); |
John Fastabend | 8532824 | 2013-11-26 06:33:52 +0000 | [diff] [blame] | 32 | #else |
| 33 | static inline int lockdep_rtnl_is_held(void) |
| 34 | { |
| 35 | return 1; |
| 36 | } |
Paul E. McKenney | a898def | 2010-02-22 17:04:49 -0800 | [diff] [blame] | 37 | #endif /* #ifdef CONFIG_PROVE_LOCKING */ |
Stephen Hemminger | 6756ae4 | 2006-03-20 22:23:58 -0800 | [diff] [blame] | 38 | |
Eric Dumazet | a6e0fc8 | 2010-09-08 14:15:32 -0700 | [diff] [blame] | 39 | /** |
| 40 | * rcu_dereference_rtnl - rcu_dereference with debug checking |
| 41 | * @p: The pointer to read, prior to dereferencing |
| 42 | * |
| 43 | * Do an rcu_dereference(p), but check caller either holds rcu_read_lock() |
David S. Miller | 29fa060 | 2010-10-05 00:29:48 -0700 | [diff] [blame] | 44 | * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference() |
Eric Dumazet | a6e0fc8 | 2010-09-08 14:15:32 -0700 | [diff] [blame] | 45 | */ |
| 46 | #define rcu_dereference_rtnl(p) \ |
Michal Hocko | d8bf4ca | 2011-07-08 14:39:41 +0200 | [diff] [blame] | 47 | rcu_dereference_check(p, lockdep_rtnl_is_held()) |
Eric Dumazet | a6e0fc8 | 2010-09-08 14:15:32 -0700 | [diff] [blame] | 48 | |
Eric Dumazet | 7dff59e | 2010-09-15 11:07:15 +0000 | [diff] [blame] | 49 | /** |
John Fastabend | 331b729 | 2014-09-12 20:08:20 -0700 | [diff] [blame] | 50 | * rcu_dereference_bh_rtnl - rcu_dereference_bh with debug checking |
| 51 | * @p: The pointer to read, prior to dereference |
| 52 | * |
| 53 | * Do an rcu_dereference_bh(p), but check caller either holds rcu_read_lock_bh() |
| 54 | * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference_bh() |
| 55 | */ |
| 56 | #define rcu_dereference_bh_rtnl(p) \ |
| 57 | rcu_dereference_bh_check(p, lockdep_rtnl_is_held()) |
| 58 | |
| 59 | /** |
David S. Miller | 29fa060 | 2010-10-05 00:29:48 -0700 | [diff] [blame] | 60 | * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL |
Eric Dumazet | 7dff59e | 2010-09-15 11:07:15 +0000 | [diff] [blame] | 61 | * @p: The pointer to read, prior to dereferencing |
| 62 | * |
David S. Miller | 29fa060 | 2010-10-05 00:29:48 -0700 | [diff] [blame] | 63 | * Return the value of the specified RCU-protected pointer, but omit |
| 64 | * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because |
| 65 | * caller holds RTNL. |
Eric Dumazet | 7dff59e | 2010-09-15 11:07:15 +0000 | [diff] [blame] | 66 | */ |
| 67 | #define rtnl_dereference(p) \ |
David S. Miller | 29fa060 | 2010-10-05 00:29:48 -0700 | [diff] [blame] | 68 | rcu_dereference_protected(p, lockdep_rtnl_is_held()) |
Eric Dumazet | 7dff59e | 2010-09-15 11:07:15 +0000 | [diff] [blame] | 69 | |
Eric Dumazet | 24824a0 | 2010-10-02 06:11:55 +0000 | [diff] [blame] | 70 | static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev) |
| 71 | { |
| 72 | return rtnl_dereference(dev->ingress_queue); |
| 73 | } |
| 74 | |
| 75 | extern struct netdev_queue *dev_ingress_queue_create(struct net_device *dev); |
| 76 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | extern void rtnetlink_init(void); |
Stephen Hemminger | 6756ae4 | 2006-03-20 22:23:58 -0800 | [diff] [blame] | 78 | extern void __rtnl_unlock(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
| 80 | #define ASSERT_RTNL() do { \ |
Patrick McHardy | c9c1014 | 2008-04-23 22:10:48 -0700 | [diff] [blame] | 81 | if (unlikely(!rtnl_is_locked())) { \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \ |
| 83 | __FILE__, __LINE__); \ |
| 84 | dump_stack(); \ |
| 85 | } \ |
| 86 | } while(0) |
| 87 | |
John Fastabend | 7716202 | 2012-04-15 06:43:56 +0000 | [diff] [blame] | 88 | extern int ndo_dflt_fdb_dump(struct sk_buff *skb, |
| 89 | struct netlink_callback *cb, |
| 90 | struct net_device *dev, |
Jamal Hadi Salim | 5d5eacb | 2014-07-10 07:01:58 -0400 | [diff] [blame] | 91 | struct net_device *filter_dev, |
John Fastabend | 7716202 | 2012-04-15 06:43:56 +0000 | [diff] [blame] | 92 | int idx); |
Vlad Yasevich | 090096b | 2013-03-06 15:39:42 +0000 | [diff] [blame] | 93 | extern int ndo_dflt_fdb_add(struct ndmsg *ndm, |
| 94 | struct nlattr *tb[], |
| 95 | struct net_device *dev, |
| 96 | const unsigned char *addr, |
| 97 | u16 flags); |
| 98 | extern int ndo_dflt_fdb_del(struct ndmsg *ndm, |
| 99 | struct nlattr *tb[], |
| 100 | struct net_device *dev, |
| 101 | const unsigned char *addr); |
John Fastabend | 815cccb | 2012-10-24 08:13:09 +0000 | [diff] [blame] | 102 | |
| 103 | extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, |
| 104 | struct net_device *dev, u16 mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | #endif /* __LINUX_RTNETLINK_H */ |