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);
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);
26void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev,
27 gfp_t flags);
28
29
30/* RTNL is used as a global lock for all changes to network configuration */
31extern void rtnl_lock(void);
32extern void rtnl_unlock(void);
33extern int rtnl_trylock(void);
34extern int rtnl_is_locked(void);
35
36extern wait_queue_head_t netdev_unregistering_wq;
37extern struct mutex net_mutex;
38
39#ifdef CONFIG_PROVE_LOCKING
40extern bool lockdep_rtnl_is_held(void);
41#else
42static inline bool lockdep_rtnl_is_held(void)
43{
44 return true;
45}
46#endif /* #ifdef CONFIG_PROVE_LOCKING */
47
48/**
49 * rcu_dereference_rtnl - rcu_dereference with debug checking
50 * @p: The pointer to read, prior to dereferencing
51 *
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()
54 */
55#define rcu_dereference_rtnl(p) \
56 rcu_dereference_check(p, lockdep_rtnl_is_held())
57
58/**
59 * rcu_dereference_bh_rtnl - rcu_dereference_bh with debug checking
60 * @p: The pointer to read, prior to dereference
61 *
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()
64 */
65#define rcu_dereference_bh_rtnl(p) \
66 rcu_dereference_bh_check(p, lockdep_rtnl_is_held())
67
68/**
69 * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
70 * @p: The pointer to read, prior to dereferencing
71 *
72 * Return the value of the specified RCU-protected pointer, but omit
73 * both the smp_read_barrier_depends() and the READ_ONCE(), because
74 * 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() do { \
101 if (unlikely(!rtnl_is_locked())) { \
102 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
103 __FILE__, __LINE__); \
104 dump_stack(); \
105 } \
106} while(0)
107
108extern 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,
112 int *idx);
113extern int ndo_dflt_fdb_add(struct ndmsg *ndm,
114 struct nlattr *tb[],
115 struct net_device *dev,
116 const unsigned char *addr,
117 u16 vid,
118 u16 flags);
119extern int ndo_dflt_fdb_del(struct ndmsg *ndm,
120 struct nlattr *tb[],
121 struct net_device *dev,
122 const unsigned char *addr,
123 u16 vid);
124
125extern 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,
128 u32 filter_mask,
129 int (*vlan_fill)(struct sk_buff *skb,
130 struct net_device *dev,
131 u32 filter_mask));
132#endif /* __LINUX_RTNETLINK_H */