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 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change, gfp_t flags);
  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 #else
  28 static inline int lockdep_rtnl_is_held(void)
  29 {
  30         return 1;
  31 }
  32 #endif /* #ifdef CONFIG_PROVE_LOCKING */
  33
  34 /**
  35  * rcu_dereference_rtnl - rcu_dereference with debug checking
  36  * @p: The pointer to read, prior to dereferencing
  37  *
  38  * Do an rcu_dereference(p), but check caller either holds rcu_read_lock()
  39  * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference()
  40  */
  41 #define rcu_dereference_rtnl(p)                                 \
  42         rcu_dereference_check(p, lockdep_rtnl_is_held())
  43
  44 /**
  45  * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
  46  * @p: The pointer to read, prior to dereferencing
  47  *
  48  * Return the value of the specified RCU-protected pointer, but omit
  49  * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because
  50  * caller holds RTNL.
  51  */
  52 #define rtnl_dereference(p)                                     \
  53         rcu_dereference_protected(p, lockdep_rtnl_is_held())
  54
  55 static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
  56 {
  57         return rtnl_dereference(dev->ingress_queue);
  58 }
  59
  60 extern struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
  61
  62 extern void rtnetlink_init(void);
  63 extern void __rtnl_unlock(void);
  64
  65 #define ASSERT_RTNL() do { \
  66         if (unlikely(!rtnl_is_locked())) { \
  67                 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
  68                        __FILE__,  __LINE__); \
  69                 dump_stack(); \
  70         } \
  71 } while(0)
  72
  73 extern int ndo_dflt_fdb_dump(struct sk_buff *skb,
  74                              struct netlink_callback *cb,
  75                              struct net_device *dev,
  76                              int idx);
  77 extern int ndo_dflt_fdb_add(struct ndmsg *ndm,
  78                             struct nlattr *tb[],
  79                             struct net_device *dev,
  80                             const unsigned char *addr,
  81                              u16 flags);
  82 extern int ndo_dflt_fdb_del(struct ndmsg *ndm,
  83                             struct nlattr *tb[],
  84                             struct net_device *dev,
  85                             const unsigned char *addr);
  86
  87 extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
  88                                    struct net_device *dev, u16 mode);
  89 #endif  /* __LINUX_RTNETLINK_H */