Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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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 <linux/refcount.h>
10#include <uapi/linux/rtnetlink.h>
11
12extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
13extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
14extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
15 u32 group, const struct nlmsghdr *nlh, gfp_t flags);
16extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
17extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
18extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
19 u32 id, long expires, u32 error);
20
21void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, gfp_t flags,
22 u32 portid, const struct nlmsghdr *nlh);
23void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
24 gfp_t flags, int *new_nsid, int new_ifindex);
25struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
26 unsigned change, u32 event,
27 gfp_t flags, int *new_nsid,
28 int new_ifindex, u32 portid,
29 const struct nlmsghdr *nlh);
30void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev,
31 gfp_t flags, u32 portid, const struct nlmsghdr *nlh);
32
33
34/* RTNL is used as a global lock for all changes to network configuration */
35extern void rtnl_lock(void);
36extern void rtnl_unlock(void);
37extern int rtnl_trylock(void);
38extern int rtnl_is_locked(void);
39extern int rtnl_lock_killable(void);
40extern bool refcount_dec_and_rtnl_lock(refcount_t *r);
41
42extern wait_queue_head_t netdev_unregistering_wq;
43extern struct rw_semaphore pernet_ops_rwsem;
44extern struct rw_semaphore net_rwsem;
45
46#ifdef CONFIG_PROVE_LOCKING
47extern bool lockdep_rtnl_is_held(void);
48#else
49static inline bool lockdep_rtnl_is_held(void)
50{
51 return true;
52}
53#endif /* #ifdef CONFIG_PROVE_LOCKING */
54
55/**
56 * rcu_dereference_rtnl - rcu_dereference with debug checking
57 * @p: The pointer to read, prior to dereferencing
58 *
59 * Do an rcu_dereference(p), but check caller either holds rcu_read_lock()
60 * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference()
61 */
62#define rcu_dereference_rtnl(p) \
63 rcu_dereference_check(p, lockdep_rtnl_is_held())
64
65/**
66 * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
67 * @p: The pointer to read, prior to dereferencing
68 *
69 * Return the value of the specified RCU-protected pointer, but omit
70 * the READ_ONCE(), because caller holds RTNL.
71 */
72#define rtnl_dereference(p) \
73 rcu_dereference_protected(p, lockdep_rtnl_is_held())
74
75static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
76{
77 return rtnl_dereference(dev->ingress_queue);
78}
79
80static inline struct netdev_queue *dev_ingress_queue_rcu(struct net_device *dev)
81{
82 return rcu_dereference(dev->ingress_queue);
83}
84
85struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
86
87#ifdef CONFIG_NET_INGRESS
88void net_inc_ingress_queue(void);
89void net_dec_ingress_queue(void);
90#endif
91
92#ifdef CONFIG_NET_EGRESS
93void net_inc_egress_queue(void);
94void net_dec_egress_queue(void);
95void netdev_xmit_skip_txqueue(bool skip);
96#endif
97
98void rtnetlink_init(void);
99void __rtnl_unlock(void);
100void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail);
101
102#define ASSERT_RTNL() \
103 WARN_ONCE(!rtnl_is_locked(), \
104 "RTNL: assertion failed at %s (%d)\n", __FILE__, __LINE__)
105
106extern int ndo_dflt_fdb_dump(struct sk_buff *skb,
107 struct netlink_callback *cb,
108 struct net_device *dev,
109 struct net_device *filter_dev,
110 int *idx);
111extern int ndo_dflt_fdb_add(struct ndmsg *ndm,
112 struct nlattr *tb[],
113 struct net_device *dev,
114 const unsigned char *addr,
115 u16 vid,
116 u16 flags);
117extern int ndo_dflt_fdb_del(struct ndmsg *ndm,
118 struct nlattr *tb[],
119 struct net_device *dev,
120 const unsigned char *addr,
121 u16 vid);
122
123extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
124 struct net_device *dev, u16 mode,
125 u32 flags, u32 mask, int nlflags,
126 u32 filter_mask,
127 int (*vlan_fill)(struct sk_buff *skb,
128 struct net_device *dev,
129 u32 filter_mask));
130
131extern void rtnl_offload_xstats_notify(struct net_device *dev);
132
133#endif /* __LINUX_RTNETLINK_H */