1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __LINUX_RTNETLINK_H
3 #define __LINUX_RTNETLINK_H
6 #include <linux/mutex.h>
7 #include <linux/netdevice.h>
8 #include <linux/wait.h>
9 #include <uapi/linux/rtnetlink.h>
11 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
12 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
13 extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
14 u32 group, struct nlmsghdr *nlh, gfp_t flags);
15 extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
16 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
17 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
18 u32 id, long expires, u32 error);
20 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change, gfp_t flags);
21 void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
22 gfp_t flags, int *new_nsid, int new_ifindex);
23 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
24 unsigned change, u32 event,
25 gfp_t flags, int *new_nsid,
27 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev,
31 /* RTNL is used as a global lock for all changes to network configuration */
32 extern void rtnl_lock(void);
33 extern void rtnl_unlock(void);
34 extern int rtnl_trylock(void);
35 extern int rtnl_is_locked(void);
36 extern int rtnl_lock_killable(void);
38 extern wait_queue_head_t netdev_unregistering_wq;
39 extern struct rw_semaphore net_sem;
41 #ifdef CONFIG_PROVE_LOCKING
42 extern bool lockdep_rtnl_is_held(void);
44 static inline bool lockdep_rtnl_is_held(void)
48 #endif /* #ifdef CONFIG_PROVE_LOCKING */
51 * rcu_dereference_rtnl - rcu_dereference with debug checking
52 * @p: The pointer to read, prior to dereferencing
54 * Do an rcu_dereference(p), but check caller either holds rcu_read_lock()
55 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference()
57 #define rcu_dereference_rtnl(p) \
58 rcu_dereference_check(p, lockdep_rtnl_is_held())
61 * rcu_dereference_bh_rtnl - rcu_dereference_bh with debug checking
62 * @p: The pointer to read, prior to dereference
64 * Do an rcu_dereference_bh(p), but check caller either holds rcu_read_lock_bh()
65 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference_bh()
67 #define rcu_dereference_bh_rtnl(p) \
68 rcu_dereference_bh_check(p, lockdep_rtnl_is_held())
71 * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
72 * @p: The pointer to read, prior to dereferencing
74 * Return the value of the specified RCU-protected pointer, but omit
75 * the READ_ONCE(), because caller holds RTNL.
77 #define rtnl_dereference(p) \
78 rcu_dereference_protected(p, lockdep_rtnl_is_held())
80 static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
82 return rtnl_dereference(dev->ingress_queue);
85 struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
87 #ifdef CONFIG_NET_INGRESS
88 void net_inc_ingress_queue(void);
89 void net_dec_ingress_queue(void);
92 #ifdef CONFIG_NET_EGRESS
93 void net_inc_egress_queue(void);
94 void net_dec_egress_queue(void);
97 void rtnetlink_init(void);
98 void __rtnl_unlock(void);
99 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail);
101 #define ASSERT_RTNL() \
102 WARN_ONCE(!rtnl_is_locked(), \
103 "RTNL: assertion failed at %s (%d)\n", __FILE__, __LINE__)
105 extern int ndo_dflt_fdb_dump(struct sk_buff *skb,
106 struct netlink_callback *cb,
107 struct net_device *dev,
108 struct net_device *filter_dev,
110 extern int ndo_dflt_fdb_add(struct ndmsg *ndm,
112 struct net_device *dev,
113 const unsigned char *addr,
116 extern int ndo_dflt_fdb_del(struct ndmsg *ndm,
118 struct net_device *dev,
119 const unsigned char *addr,
122 extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
123 struct net_device *dev, u16 mode,
124 u32 flags, u32 mask, int nlflags,
126 int (*vlan_fill)(struct sk_buff *skb,
127 struct net_device *dev,
129 #endif /* __LINUX_RTNETLINK_H */