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 <linux/wait.h>
   8#include <uapi/linux/rtnetlink.h>
   9
  10extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
  11extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
  12extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
  13                        u32 group, struct nlmsghdr *nlh, gfp_t flags);
  14extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
  15extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
  16extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
  17                              u32 id, long expires, u32 error);
  18
  19void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change, gfp_t flags);
  20
  21/* RTNL is used as a global lock for all changes to network configuration  */
  22extern void rtnl_lock(void);
  23extern void rtnl_unlock(void);
  24extern int rtnl_trylock(void);
  25extern int rtnl_is_locked(void);
  26
  27extern wait_queue_head_t netdev_unregistering_wq;
  28extern struct mutex net_mutex;
  29
  30#ifdef CONFIG_PROVE_LOCKING
  31extern int lockdep_rtnl_is_held(void);
  32#else
  33static inline int lockdep_rtnl_is_held(void)
  34{
  35        return 1;
  36}
  37#endif /* #ifdef CONFIG_PROVE_LOCKING */
  38
  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()
  44 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference()
  45 */
  46#define rcu_dereference_rtnl(p)                                 \
  47        rcu_dereference_check(p, lockdep_rtnl_is_held())
  48
  49/**
  50 * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
  51 * @p: The pointer to read, prior to dereferencing
  52 *
  53 * Return the value of the specified RCU-protected pointer, but omit
  54 * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because
  55 * caller holds RTNL.
  56 */
  57#define rtnl_dereference(p)                                     \
  58        rcu_dereference_protected(p, lockdep_rtnl_is_held())
  59
  60static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
  61{
  62        return rtnl_dereference(dev->ingress_queue);
  63}
  64
  65extern struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
  66
  67extern void rtnetlink_init(void);
  68extern void __rtnl_unlock(void);
  69
  70#define ASSERT_RTNL() do { \
  71        if (unlikely(!rtnl_is_locked())) { \
  72                printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
  73                       __FILE__,  __LINE__); \
  74                dump_stack(); \
  75        } \
  76} while(0)
  77
  78extern int ndo_dflt_fdb_dump(struct sk_buff *skb,
  79                             struct netlink_callback *cb,
  80                             struct net_device *dev,
  81                             struct net_device *filter_dev,
  82                             int idx);
  83extern int ndo_dflt_fdb_add(struct ndmsg *ndm,
  84                            struct nlattr *tb[],
  85                            struct net_device *dev,
  86                            const unsigned char *addr,
  87                             u16 flags);
  88extern int ndo_dflt_fdb_del(struct ndmsg *ndm,
  89                            struct nlattr *tb[],
  90                            struct net_device *dev,
  91                            const unsigned char *addr);
  92
  93extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
  94                                   struct net_device *dev, u16 mode);
  95#endif  /* __LINUX_RTNETLINK_H */
  96