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
);
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
);
26 void rtmsg_ifinfo_send(struct sk_buff
*skb
, struct net_device
*dev
,
30 /* RTNL is used as a global lock for all changes to network configuration */
31 extern void rtnl_lock(void);
32 extern void rtnl_unlock(void);
33 extern int rtnl_trylock(void);
34 extern int rtnl_is_locked(void);
36 extern wait_queue_head_t netdev_unregistering_wq
;
37 extern struct mutex net_mutex
;
39 #ifdef CONFIG_PROVE_LOCKING
40 extern bool lockdep_rtnl_is_held(void);
42 static inline bool lockdep_rtnl_is_held(void)
46 #endif /* #ifdef CONFIG_PROVE_LOCKING */
49 * rcu_dereference_rtnl - rcu_dereference with debug checking
50 * @p: The pointer to read, prior to dereferencing
52 * Do an rcu_dereference(p), but check caller either holds rcu_read_lock()
53 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference()
55 #define rcu_dereference_rtnl(p) \
56 rcu_dereference_check(p, lockdep_rtnl_is_held())
59 * rcu_dereference_bh_rtnl - rcu_dereference_bh with debug checking
60 * @p: The pointer to read, prior to dereference
62 * Do an rcu_dereference_bh(p), but check caller either holds rcu_read_lock_bh()
63 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference_bh()
65 #define rcu_dereference_bh_rtnl(p) \
66 rcu_dereference_bh_check(p, lockdep_rtnl_is_held())
69 * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
70 * @p: The pointer to read, prior to dereferencing
72 * Return the value of the specified RCU-protected pointer, but omit
73 * both the smp_read_barrier_depends() and the READ_ONCE(), because
76 #define rtnl_dereference(p) \
77 rcu_dereference_protected(p, lockdep_rtnl_is_held())
79 static inline struct netdev_queue
*dev_ingress_queue(struct net_device
*dev
)
81 return rtnl_dereference(dev
->ingress_queue
);
84 struct netdev_queue
*dev_ingress_queue_create(struct net_device
*dev
);
86 #ifdef CONFIG_NET_INGRESS
87 void net_inc_ingress_queue(void);
88 void net_dec_ingress_queue(void);
91 #ifdef CONFIG_NET_EGRESS
92 void net_inc_egress_queue(void);
93 void net_dec_egress_queue(void);
96 void rtnetlink_init(void);
97 void __rtnl_unlock(void);
98 void rtnl_kfree_skbs(struct sk_buff
*head
, struct sk_buff
*tail
);
100 #define ASSERT_RTNL() do { \
101 if (unlikely(!rtnl_is_locked())) { \
102 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
103 __FILE__, __LINE__); \
108 extern int ndo_dflt_fdb_dump(struct sk_buff
*skb
,
109 struct netlink_callback
*cb
,
110 struct net_device
*dev
,
111 struct net_device
*filter_dev
,
113 extern int ndo_dflt_fdb_add(struct ndmsg
*ndm
,
115 struct net_device
*dev
,
116 const unsigned char *addr
,
119 extern int ndo_dflt_fdb_del(struct ndmsg
*ndm
,
121 struct net_device
*dev
,
122 const unsigned char *addr
,
125 extern int ndo_dflt_bridge_getlink(struct sk_buff
*skb
, u32 pid
, u32 seq
,
126 struct net_device
*dev
, u16 mode
,
127 u32 flags
, u32 mask
, int nlflags
,
129 int (*vlan_fill
)(struct sk_buff
*skb
,
130 struct net_device
*dev
,
132 #endif /* __LINUX_RTNETLINK_H */