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TOMOYO Linux Cross Reference
Linux/include/linux/rtnetlink.h

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  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 
 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);
 12 extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
 13                         u32 group, struct nlmsghdr *nlh, gfp_t flags);
 14 extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
 15 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
 16 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
 17                               u32 id, long expires, u32 error);
 18 
 19 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change, gfp_t flags);
 20 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
 21                                        unsigned change, gfp_t flags);
 22 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev,
 23                        gfp_t flags);
 24 
 25 
 26 /* RTNL is used as a global lock for all changes to network configuration  */
 27 extern void rtnl_lock(void);
 28 extern void rtnl_unlock(void);
 29 extern int rtnl_trylock(void);
 30 extern int rtnl_is_locked(void);
 31 
 32 extern wait_queue_head_t netdev_unregistering_wq;
 33 extern struct mutex net_mutex;
 34 
 35 #ifdef CONFIG_PROVE_LOCKING
 36 extern bool lockdep_rtnl_is_held(void);
 37 #else
 38 static inline bool lockdep_rtnl_is_held(void)
 39 {
 40         return true;
 41 }
 42 #endif /* #ifdef CONFIG_PROVE_LOCKING */
 43 
 44 /**
 45  * rcu_dereference_rtnl - rcu_dereference with debug checking
 46  * @p: The pointer to read, prior to dereferencing
 47  *
 48  * Do an rcu_dereference(p), but check caller either holds rcu_read_lock()
 49  * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference()
 50  */
 51 #define rcu_dereference_rtnl(p)                                 \
 52         rcu_dereference_check(p, lockdep_rtnl_is_held())
 53 
 54 /**
 55  * rcu_dereference_bh_rtnl - rcu_dereference_bh with debug checking
 56  * @p: The pointer to read, prior to dereference
 57  *
 58  * Do an rcu_dereference_bh(p), but check caller either holds rcu_read_lock_bh()
 59  * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference_bh()
 60  */
 61 #define rcu_dereference_bh_rtnl(p)                              \
 62         rcu_dereference_bh_check(p, lockdep_rtnl_is_held())
 63 
 64 /**
 65  * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
 66  * @p: The pointer to read, prior to dereferencing
 67  *
 68  * Return the value of the specified RCU-protected pointer, but omit
 69  * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because
 70  * caller holds RTNL.
 71  */
 72 #define rtnl_dereference(p)                                     \
 73         rcu_dereference_protected(p, lockdep_rtnl_is_held())
 74 
 75 static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
 76 {
 77         return rtnl_dereference(dev->ingress_queue);
 78 }
 79 
 80 struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
 81 
 82 #ifdef CONFIG_NET_INGRESS
 83 void net_inc_ingress_queue(void);
 84 void net_dec_ingress_queue(void);
 85 #endif
 86 
 87 #ifdef CONFIG_NET_EGRESS
 88 void net_inc_egress_queue(void);
 89 void net_dec_egress_queue(void);
 90 #endif
 91 
 92 void rtnetlink_init(void);
 93 void __rtnl_unlock(void);
 94 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail);
 95 
 96 #define ASSERT_RTNL() do { \
 97         if (unlikely(!rtnl_is_locked())) { \
 98                 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
 99                        __FILE__,  __LINE__); \
100                 dump_stack(); \
101         } \
102 } while(0)
103 
104 extern int ndo_dflt_fdb_dump(struct sk_buff *skb,
105                              struct netlink_callback *cb,
106                              struct net_device *dev,
107                              struct net_device *filter_dev,
108                              int *idx);
109 extern int ndo_dflt_fdb_add(struct ndmsg *ndm,
110                             struct nlattr *tb[],
111                             struct net_device *dev,
112                             const unsigned char *addr,
113                             u16 vid,
114                             u16 flags);
115 extern int ndo_dflt_fdb_del(struct ndmsg *ndm,
116                             struct nlattr *tb[],
117                             struct net_device *dev,
118                             const unsigned char *addr,
119                             u16 vid);
120 
121 extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
122                                    struct net_device *dev, u16 mode,
123                                    u32 flags, u32 mask, int nlflags,
124                                    u32 filter_mask,
125                                    int (*vlan_fill)(struct sk_buff *skb,
126                                                     struct net_device *dev,
127                                                     u32 filter_mask));
128 #endif  /* __LINUX_RTNETLINK_H */
129 

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