| 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 | extern void rtnetlink_init(void); |
| 93 | extern void __rtnl_unlock(void); |
| 94 | |
| 95 | #define ASSERT_RTNL() do { \ |
| 96 | if (unlikely(!rtnl_is_locked())) { \ |
| 97 | printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \ |
| 98 | __FILE__, __LINE__); \ |
| 99 | dump_stack(); \ |
| 100 | } \ |
| 101 | } while(0) |
| 102 | |
| 103 | extern int ndo_dflt_fdb_dump(struct sk_buff *skb, |
| 104 | struct netlink_callback *cb, |
| 105 | struct net_device *dev, |
| 106 | struct net_device *filter_dev, |
| 107 | int idx); |
| 108 | extern int ndo_dflt_fdb_add(struct ndmsg *ndm, |
| 109 | struct nlattr *tb[], |
| 110 | struct net_device *dev, |
| 111 | const unsigned char *addr, |
| 112 | u16 vid, |
| 113 | u16 flags); |
| 114 | extern int ndo_dflt_fdb_del(struct ndmsg *ndm, |
| 115 | struct nlattr *tb[], |
| 116 | struct net_device *dev, |
| 117 | const unsigned char *addr, |
| 118 | u16 vid); |
| 119 | |
| 120 | extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, |
| 121 | struct net_device *dev, u16 mode, |
| 122 | u32 flags, u32 mask, int nlflags, |
| 123 | u32 filter_mask, |
| 124 | int (*vlan_fill)(struct sk_buff *skb, |
| 125 | struct net_device *dev, |
| 126 | u32 filter_mask)); |
| 127 | #endif /* __LINUX_RTNETLINK_H */ |