diff options
Diffstat (limited to 'include/linux/rtnetlink.h')
| -rw-r--r-- | include/linux/rtnetlink.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h new file mode 100644 index 000000000..7b8e260c4 --- /dev/null +++ b/include/linux/rtnetlink.h @@ -0,0 +1,126 @@ +#ifndef __LINUX_RTNETLINK_H +#define __LINUX_RTNETLINK_H + + +#include <linux/mutex.h> +#include <linux/netdevice.h> +#include <linux/wait.h> +#include <uapi/linux/rtnetlink.h> + +extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo); +extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid); +extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, + u32 group, struct nlmsghdr *nlh, gfp_t flags); +extern void rtnl_set_sk_err(struct net *net, u32 group, int error); +extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics); +extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, + u32 id, long expires, u32 error); + +void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change, gfp_t flags); +struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, + unsigned change, gfp_t flags); +void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, + gfp_t flags); + + +/* RTNL is used as a global lock for all changes to network configuration */ +extern void rtnl_lock(void); +extern void rtnl_unlock(void); +extern int rtnl_trylock(void); +extern int rtnl_is_locked(void); + +extern wait_queue_head_t netdev_unregistering_wq; +extern struct mutex net_mutex; + +#ifdef CONFIG_PROVE_LOCKING +extern int lockdep_rtnl_is_held(void); +#else +static inline int lockdep_rtnl_is_held(void) +{ + return 1; +} +#endif /* #ifdef CONFIG_PROVE_LOCKING */ + +/** + * rcu_dereference_rtnl - rcu_dereference with debug checking + * @p: The pointer to read, prior to dereferencing + * + * Do an rcu_dereference(p), but check caller either holds rcu_read_lock() + * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference() + */ +#define rcu_dereference_rtnl(p) \ + rcu_dereference_check(p, lockdep_rtnl_is_held()) + +/** + * rcu_dereference_bh_rtnl - rcu_dereference_bh with debug checking + * @p: The pointer to read, prior to dereference + * + * Do an rcu_dereference_bh(p), but check caller either holds rcu_read_lock_bh() + * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference_bh() + */ +#define rcu_dereference_bh_rtnl(p) \ + rcu_dereference_bh_check(p, lockdep_rtnl_is_held()) + +/** + * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL + * @p: The pointer to read, prior to dereferencing + * + * Return the value of the specified RCU-protected pointer, but omit + * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because + * caller holds RTNL. + */ +#define rtnl_dereference(p) \ + rcu_dereference_protected(p, lockdep_rtnl_is_held()) + +static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev) +{ + return rtnl_dereference(dev->ingress_queue); +} + +struct netdev_queue *dev_ingress_queue_create(struct net_device *dev); + +#ifdef CONFIG_NET_CLS_ACT +void net_inc_ingress_queue(void); +void net_dec_ingress_queue(void); +#else +static inline void net_inc_ingress_queue(void) +{ +} + +static inline void net_dec_ingress_queue(void) +{ +} +#endif + +extern void rtnetlink_init(void); +extern void __rtnl_unlock(void); + +#define ASSERT_RTNL() do { \ + if (unlikely(!rtnl_is_locked())) { \ + printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \ + __FILE__, __LINE__); \ + dump_stack(); \ + } \ +} while(0) + +extern int ndo_dflt_fdb_dump(struct sk_buff *skb, + struct netlink_callback *cb, + struct net_device *dev, + struct net_device *filter_dev, + int idx); +extern int ndo_dflt_fdb_add(struct ndmsg *ndm, + struct nlattr *tb[], + struct net_device *dev, + const unsigned char *addr, + u16 vid, + u16 flags); +extern int ndo_dflt_fdb_del(struct ndmsg *ndm, + struct nlattr *tb[], + struct net_device *dev, + const unsigned char *addr, + u16 vid); + +extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, + struct net_device *dev, u16 mode, + u32 flags, u32 mask, int nlflags); +#endif /* __LINUX_RTNETLINK_H */ |