Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __LINUX_RTNETLINK_H
3#define __LINUX_RTNETLINK_H
4
5
6#include <linux/mutex.h>
7#include <linux/netdevice.h>
8#include <linux/wait.h>
9#include <uapi/linux/rtnetlink.h>
10
11extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
12extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
13extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
14 u32 group, struct nlmsghdr *nlh, gfp_t flags);
15extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
16extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
17extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
18 u32 id, long expires, u32 error);
19
20void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change, gfp_t flags);
21void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
22 gfp_t flags, int *new_nsid, int new_ifindex);
23struct 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 int new_ifindex);
27void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev,
28 gfp_t flags);
29
30
31/* RTNL is used as a global lock for all changes to network configuration */
32extern void rtnl_lock(void);
33extern void rtnl_unlock(void);
34extern int rtnl_trylock(void);
35extern int rtnl_is_locked(void);
36
37extern wait_queue_head_t netdev_unregistering_wq;
38extern struct mutex net_mutex;
39
40#ifdef CONFIG_PROVE_LOCKING
41extern bool lockdep_rtnl_is_held(void);
42#else
43static inline bool lockdep_rtnl_is_held(void)
44{
45 return true;
46}
47#endif /* #ifdef CONFIG_PROVE_LOCKING */
48
49/**
50 * rcu_dereference_rtnl - rcu_dereference with debug checking
51 * @p: The pointer to read, prior to dereferencing
52 *
53 * Do an rcu_dereference(p), but check caller either holds rcu_read_lock()
54 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference()
55 */
56#define rcu_dereference_rtnl(p) \
57 rcu_dereference_check(p, lockdep_rtnl_is_held())
58
59/**
60 * rcu_dereference_bh_rtnl - rcu_dereference_bh with debug checking
61 * @p: The pointer to read, prior to dereference
62 *
63 * Do an rcu_dereference_bh(p), but check caller either holds rcu_read_lock_bh()
64 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference_bh()
65 */
66#define rcu_dereference_bh_rtnl(p) \
67 rcu_dereference_bh_check(p, lockdep_rtnl_is_held())
68
69/**
70 * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
71 * @p: The pointer to read, prior to dereferencing
72 *
73 * Return the value of the specified RCU-protected pointer, but omit
74 * the READ_ONCE(), because caller holds RTNL.
75 */
76#define rtnl_dereference(p) \
77 rcu_dereference_protected(p, lockdep_rtnl_is_held())
78
79static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
80{
81 return rtnl_dereference(dev->ingress_queue);
82}
83
84struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
85
86#ifdef CONFIG_NET_INGRESS
87void net_inc_ingress_queue(void);
88void net_dec_ingress_queue(void);
89#endif
90
91#ifdef CONFIG_NET_EGRESS
92void net_inc_egress_queue(void);
93void net_dec_egress_queue(void);
94#endif
95
96void rtnetlink_init(void);
97void __rtnl_unlock(void);
98void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail);
99
100#define ASSERT_RTNL() \
101 WARN_ONCE(!rtnl_is_locked(), \
102 "RTNL: assertion failed at %s (%d)\n", __FILE__, __LINE__)
103
104extern int ndo_dflt_fdb_dump(struct sk_buff *skb,
105 struct netlink_callback *cb,
106 struct net_device *dev,
107 struct net_device *filter_dev,
108 int *idx);
109extern int ndo_dflt_fdb_add(struct ndmsg *ndm,
110 struct nlattr *tb[],
111 struct net_device *dev,
112 const unsigned char *addr,
113 u16 vid,
114 u16 flags);
115extern int ndo_dflt_fdb_del(struct ndmsg *ndm,
116 struct nlattr *tb[],
117 struct net_device *dev,
118 const unsigned char *addr,
119 u16 vid);
120
121extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
122 struct net_device *dev, u16 mode,
123 u32 flags, u32 mask, int nlflags,
124 u32 filter_mask,
125 int (*vlan_fill)(struct sk_buff *skb,
126 struct net_device *dev,
127 u32 filter_mask));
128#endif /* __LINUX_RTNETLINK_H */