LXR linux/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
   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
  18void 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  */
  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#else
  28static 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
  55static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
  56{
  57        return rtnl_dereference(dev->ingress_queue);
  58}
  59
  60extern struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
  61
  62extern void rtnetlink_init(void);
  63extern 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
  73extern int ndo_dflt_fdb_dump(struct sk_buff *skb,
  74                             struct netlink_callback *cb,
  75                             struct net_device *dev,
  76                             int idx);
  77extern 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);
  82extern int ndo_dflt_fdb_del(struct ndmsg *ndm,
  83                            struct nlattr *tb[],
  84                            struct net_device *dev,
  85                            const unsigned char *addr);
  86
  87extern 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 */
  90