include/linux/rtnetlink.h

   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
   9 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
  10 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
  11 extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
  12                         u32 group, struct nlmsghdr *nlh, gfp_t flags);
  13 extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
  14 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
  15 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
  16                               u32 id, long expires, u32 error);
  17
  18 extern 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  */
  21 extern void rtnl_lock(void);
  22 extern void rtnl_unlock(void);
  23 extern int rtnl_trylock(void);
  24 extern int rtnl_is_locked(void);
  25 #ifdef CONFIG_PROVE_LOCKING
  26 extern 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
  50 static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
  51 {
  52         return rtnl_dereference(dev->ingress_queue);
  53 }
  54
  55 extern struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
  56
  57 extern void rtnetlink_init(void);
  58 extern 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
  68 extern int ndo_dflt_fdb_dump(struct sk_buff *skb,
  69                              struct netlink_callback *cb,
  70                              struct net_device *dev,
  71                              int idx);
  72 extern int ndo_dflt_fdb_add(struct ndmsg *ndm,
  73                             struct nlattr *tb[],
  74                             struct net_device *dev,
  75                             const unsigned char *addr,
  76                              u16 flags);
  77 extern int ndo_dflt_fdb_del(struct ndmsg *ndm,
  78                             struct nlattr *tb[],
  79                             struct net_device *dev,
  80                             const unsigned char *addr);
  81
  82 extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
  83                                    struct net_device *dev, u16 mode);
  84 #endif  /* __LINUX_RTNETLINK_H */