Line data Source code
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 :
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);
20 :
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,
27 : int new_ifindex);
28 : void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev,
29 : gfp_t flags);
30 :
31 :
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);
39 :
40 : extern wait_queue_head_t netdev_unregistering_wq;
41 : extern struct rw_semaphore pernet_ops_rwsem;
42 : extern struct rw_semaphore net_rwsem;
43 :
44 : #ifdef CONFIG_PROVE_LOCKING
45 : extern bool lockdep_rtnl_is_held(void);
46 : #else
47 : static inline bool lockdep_rtnl_is_held(void)
48 : {
49 : return true;
50 : }
51 : #endif /* #ifdef CONFIG_PROVE_LOCKING */
52 :
53 : /**
54 : * rcu_dereference_rtnl - rcu_dereference with debug checking
55 : * @p: The pointer to read, prior to dereferencing
56 : *
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()
59 : */
60 : #define rcu_dereference_rtnl(p) \
61 : rcu_dereference_check(p, lockdep_rtnl_is_held())
62 :
63 : /**
64 : * rcu_dereference_bh_rtnl - rcu_dereference_bh with debug checking
65 : * @p: The pointer to read, prior to dereference
66 : *
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()
69 : */
70 : #define rcu_dereference_bh_rtnl(p) \
71 : rcu_dereference_bh_check(p, lockdep_rtnl_is_held())
72 :
73 : /**
74 : * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
75 : * @p: The pointer to read, prior to dereferencing
76 : *
77 : * Return the value of the specified RCU-protected pointer, but omit
78 : * the READ_ONCE(), because caller holds RTNL.
79 : */
80 : #define rtnl_dereference(p) \
81 : rcu_dereference_protected(p, lockdep_rtnl_is_held())
82 :
83 6 : static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
84 : {
85 6 : return rtnl_dereference(dev->ingress_queue);
86 : }
87 :
88 : static inline struct netdev_queue *dev_ingress_queue_rcu(struct net_device *dev)
89 : {
90 : return rcu_dereference(dev->ingress_queue);
91 : }
92 :
93 : struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
94 :
95 : #ifdef CONFIG_NET_INGRESS
96 : void net_inc_ingress_queue(void);
97 : void net_dec_ingress_queue(void);
98 : #endif
99 :
100 : #ifdef CONFIG_NET_EGRESS
101 : void net_inc_egress_queue(void);
102 : void net_dec_egress_queue(void);
103 : #endif
104 :
105 : void rtnetlink_init(void);
106 : void __rtnl_unlock(void);
107 : void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail);
108 :
109 : #define ASSERT_RTNL() \
110 : WARN_ONCE(!rtnl_is_locked(), \
111 : "RTNL: assertion failed at %s (%d)\n", __FILE__, __LINE__)
112 :
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,
117 : int *idx);
118 : extern int ndo_dflt_fdb_add(struct ndmsg *ndm,
119 : struct nlattr *tb[],
120 : struct net_device *dev,
121 : const unsigned char *addr,
122 : u16 vid,
123 : u16 flags);
124 : extern int ndo_dflt_fdb_del(struct ndmsg *ndm,
125 : struct nlattr *tb[],
126 : struct net_device *dev,
127 : const unsigned char *addr,
128 : u16 vid);
129 :
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,
133 : u32 filter_mask,
134 : int (*vlan_fill)(struct sk_buff *skb,
135 : struct net_device *dev,
136 : u32 filter_mask));
137 : #endif /* __LINUX_RTNETLINK_H */
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