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 <linux/refcount.h>
10 #include <uapi/linux/rtnetlink.h>
12 extern int rtnetlink_send(struct sk_buff
*skb
, struct net
*net
, u32 pid
, u32 group
, int echo
);
13 extern int rtnl_unicast(struct sk_buff
*skb
, struct net
*net
, u32 pid
);
14 extern void rtnl_notify(struct sk_buff
*skb
, struct net
*net
, u32 pid
,
15 u32 group
, struct nlmsghdr
*nlh
, gfp_t flags
);
16 extern void rtnl_set_sk_err(struct net
*net
, u32 group
, int error
);
17 extern int rtnetlink_put_metrics(struct sk_buff
*skb
, u32
*metrics
);
18 extern int rtnl_put_cacheinfo(struct sk_buff
*skb
, struct dst_entry
*dst
,
19 u32 id
, long expires
, u32 error
);
21 void rtmsg_ifinfo(int type
, struct net_device
*dev
, unsigned change
, gfp_t flags
);
22 void rtmsg_ifinfo_newnet(int type
, struct net_device
*dev
, unsigned int change
,
23 gfp_t flags
, int *new_nsid
, int new_ifindex
);
24 struct sk_buff
*rtmsg_ifinfo_build_skb(int type
, struct net_device
*dev
,
25 unsigned change
, u32 event
,
26 gfp_t flags
, int *new_nsid
,
28 void rtmsg_ifinfo_send(struct sk_buff
*skb
, struct net_device
*dev
,
32 /* RTNL is used as a global lock for all changes to network configuration */
33 extern void rtnl_lock(void);
34 extern void rtnl_unlock(void);
35 extern int rtnl_trylock(void);
36 extern int rtnl_is_locked(void);
37 extern int rtnl_lock_killable(void);
38 extern bool refcount_dec_and_rtnl_lock(refcount_t
*r
);
40 extern wait_queue_head_t netdev_unregistering_wq
;
41 extern struct rw_semaphore pernet_ops_rwsem
;
42 extern struct rw_semaphore net_rwsem
;
44 #ifdef CONFIG_PROVE_LOCKING
45 extern bool lockdep_rtnl_is_held(void);
47 static inline bool lockdep_rtnl_is_held(void)
51 #endif /* #ifdef CONFIG_PROVE_LOCKING */
54 * rcu_dereference_rtnl - rcu_dereference with debug checking
55 * @p: The pointer to read, prior to dereferencing
57 * Do an rcu_dereference(p), but check caller either holds rcu_read_lock()
58 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference()
60 #define rcu_dereference_rtnl(p) \
61 rcu_dereference_check(p, lockdep_rtnl_is_held())
64 * rcu_dereference_bh_rtnl - rcu_dereference_bh with debug checking
65 * @p: The pointer to read, prior to dereference
67 * Do an rcu_dereference_bh(p), but check caller either holds rcu_read_lock_bh()
68 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference_bh()
70 #define rcu_dereference_bh_rtnl(p) \
71 rcu_dereference_bh_check(p, lockdep_rtnl_is_held())
74 * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
75 * @p: The pointer to read, prior to dereferencing
77 * Return the value of the specified RCU-protected pointer, but omit
78 * the READ_ONCE(), because caller holds RTNL.
80 #define rtnl_dereference(p) \
81 rcu_dereference_protected(p, lockdep_rtnl_is_held())
83 static inline struct netdev_queue
*dev_ingress_queue(struct net_device
*dev
)
85 return rtnl_dereference(dev
->ingress_queue
);
88 static inline struct netdev_queue
*dev_ingress_queue_rcu(struct net_device
*dev
)
90 return rcu_dereference(dev
->ingress_queue
);
93 struct netdev_queue
*dev_ingress_queue_create(struct net_device
*dev
);
95 #ifdef CONFIG_NET_INGRESS
96 void net_inc_ingress_queue(void);
97 void net_dec_ingress_queue(void);
100 #ifdef CONFIG_NET_EGRESS
101 void net_inc_egress_queue(void);
102 void net_dec_egress_queue(void);
105 void rtnetlink_init(void);
106 void __rtnl_unlock(void);
107 void rtnl_kfree_skbs(struct sk_buff
*head
, struct sk_buff
*tail
);
109 #define ASSERT_RTNL() \
110 WARN_ONCE(!rtnl_is_locked(), \
111 "RTNL: assertion failed at %s (%d)\n", __FILE__, __LINE__)
113 extern int ndo_dflt_fdb_dump(struct sk_buff
*skb
,
114 struct netlink_callback
*cb
,
115 struct net_device
*dev
,
116 struct net_device
*filter_dev
,
118 extern int ndo_dflt_fdb_add(struct ndmsg
*ndm
,
120 struct net_device
*dev
,
121 const unsigned char *addr
,
124 extern int ndo_dflt_fdb_del(struct ndmsg
*ndm
,
126 struct net_device
*dev
,
127 const unsigned char *addr
,
130 extern int ndo_dflt_bridge_getlink(struct sk_buff
*skb
, u32 pid
, u32 seq
,
131 struct net_device
*dev
, u16 mode
,
132 u32 flags
, u32 mask
, int nlflags
,
134 int (*vlan_fill
)(struct sk_buff
*skb
,
135 struct net_device
*dev
,
137 #endif /* __LINUX_RTNETLINK_H */