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 | static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev) |
84 | { |
85 | 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 | void netdev_xmit_skip_txqueue(bool skip); |
104 | #endif |
105 | |
106 | void rtnetlink_init(void); |
107 | void __rtnl_unlock(void); |
108 | void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail); |
109 | |
110 | #define ASSERT_RTNL() \ |
111 | WARN_ONCE(!rtnl_is_locked(), \ |
112 | "RTNL: assertion failed at %s (%d)\n", __FILE__, __LINE__) |
113 | |
114 | extern int ndo_dflt_fdb_dump(struct sk_buff *skb, |
115 | struct netlink_callback *cb, |
116 | struct net_device *dev, |
117 | struct net_device *filter_dev, |
118 | int *idx); |
119 | extern int ndo_dflt_fdb_add(struct ndmsg *ndm, |
120 | struct nlattr *tb[], |
121 | struct net_device *dev, |
122 | const unsigned char *addr, |
123 | u16 vid, |
124 | u16 flags); |
125 | extern int ndo_dflt_fdb_del(struct ndmsg *ndm, |
126 | struct nlattr *tb[], |
127 | struct net_device *dev, |
128 | const unsigned char *addr, |
129 | u16 vid); |
130 | |
131 | extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, |
132 | struct net_device *dev, u16 mode, |
133 | u32 flags, u32 mask, int nlflags, |
134 | u32 filter_mask, |
135 | int (*vlan_fill)(struct sk_buff *skb, |
136 | struct net_device *dev, |
137 | u32 filter_mask)); |
138 | |
139 | extern void rtnl_offload_xstats_notify(struct net_device *dev); |
140 | |
141 | #endif /* __LINUX_RTNETLINK_H */ |
142 | |