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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef __LINUX_RTNETLINK_H |
3 | #define __LINUX_RTNETLINK_H | |
4 | ||
1da177e4 | 5 | |
6756ae4b | 6 | #include <linux/mutex.h> |
3b42a96d | 7 | #include <linux/netdevice.h> |
200b916f | 8 | #include <linux/wait.h> |
6f99528e | 9 | #include <linux/refcount.h> |
607ca46e | 10 | #include <uapi/linux/rtnetlink.h> |
1da177e4 | 11 | |
97c53cac DL |
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); | |
1ce85fe4 PNA |
14 | extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, |
15 | u32 group, struct nlmsghdr *nlh, gfp_t flags); | |
97c53cac | 16 | extern void rtnl_set_sk_err(struct net *net, u32 group, int error); |
1da177e4 | 17 | extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics); |
e3703b3d | 18 | extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, |
87a50699 | 19 | u32 id, long expires, u32 error); |
1da177e4 | 20 | |
7f294054 | 21 | void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change, gfp_t flags); |
6621dd29 | 22 | void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change, |
38e01b30 | 23 | gfp_t flags, int *new_nsid, int new_ifindex); |
395eea6c | 24 | struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, |
3d3ea5af | 25 | unsigned change, u32 event, |
38e01b30 ND |
26 | gfp_t flags, int *new_nsid, |
27 | int new_ifindex); | |
395eea6c MB |
28 | void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, |
29 | gfp_t flags); | |
30 | ||
1da177e4 | 31 | |
6756ae4b | 32 | /* RTNL is used as a global lock for all changes to network configuration */ |
1da177e4 | 33 | extern void rtnl_lock(void); |
1da177e4 | 34 | extern void rtnl_unlock(void); |
6756ae4b | 35 | extern int rtnl_trylock(void); |
c9c1014b | 36 | extern int rtnl_is_locked(void); |
79ffdfc6 | 37 | extern int rtnl_lock_killable(void); |
6f99528e | 38 | extern bool refcount_dec_and_rtnl_lock(refcount_t *r); |
200b916f CW |
39 | |
40 | extern wait_queue_head_t netdev_unregistering_wq; | |
4420bf21 | 41 | extern struct rw_semaphore pernet_ops_rwsem; |
f0b07bb1 | 42 | extern struct rw_semaphore net_rwsem; |
200b916f | 43 | |
a898def2 | 44 | #ifdef CONFIG_PROVE_LOCKING |
0cbf3343 | 45 | extern bool lockdep_rtnl_is_held(void); |
85328240 | 46 | #else |
0cbf3343 | 47 | static inline bool lockdep_rtnl_is_held(void) |
85328240 | 48 | { |
0cbf3343 | 49 | return true; |
85328240 | 50 | } |
a898def2 | 51 | #endif /* #ifdef CONFIG_PROVE_LOCKING */ |
6756ae4b | 52 | |
a6e0fc85 ED |
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() | |
29fa060e | 58 | * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference() |
a6e0fc85 ED |
59 | */ |
60 | #define rcu_dereference_rtnl(p) \ | |
d8bf4ca9 | 61 | rcu_dereference_check(p, lockdep_rtnl_is_held()) |
a6e0fc85 | 62 | |
331b7292 JF |
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 | ||
7dff59ef | 73 | /** |
29fa060e | 74 | * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL |
7dff59ef ED |
75 | * @p: The pointer to read, prior to dereferencing |
76 | * | |
29fa060e | 77 | * Return the value of the specified RCU-protected pointer, but omit |
1ba9c5e6 | 78 | * the READ_ONCE(), because caller holds RTNL. |
7dff59ef ED |
79 | */ |
80 | #define rtnl_dereference(p) \ | |
29fa060e | 81 | rcu_dereference_protected(p, lockdep_rtnl_is_held()) |
7dff59ef | 82 | |
24824a09 ED |
83 | static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev) |
84 | { | |
85 | return rtnl_dereference(dev->ingress_queue); | |
86 | } | |
87 | ||
3a7d0d07 VB |
88 | static inline struct netdev_queue *dev_ingress_queue_rcu(struct net_device *dev) |
89 | { | |
90 | return rcu_dereference(dev->ingress_queue); | |
91 | } | |
92 | ||
4577139b DB |
93 | struct netdev_queue *dev_ingress_queue_create(struct net_device *dev); |
94 | ||
1cf51900 | 95 | #ifdef CONFIG_NET_INGRESS |
4577139b DB |
96 | void net_inc_ingress_queue(void); |
97 | void net_dec_ingress_queue(void); | |
4577139b | 98 | #endif |
24824a09 | 99 | |
1f211a1b DB |
100 | #ifdef CONFIG_NET_EGRESS |
101 | void net_inc_egress_queue(void); | |
102 | void net_dec_egress_queue(void); | |
103 | #endif | |
104 | ||
1b5c5493 ED |
105 | void rtnetlink_init(void); |
106 | void __rtnl_unlock(void); | |
107 | void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail); | |
1da177e4 | 108 | |
66364bdf LR |
109 | #define ASSERT_RTNL() \ |
110 | WARN_ONCE(!rtnl_is_locked(), \ | |
111 | "RTNL: assertion failed at %s (%d)\n", __FILE__, __LINE__) | |
1da177e4 | 112 | |
77162022 JF |
113 | extern int ndo_dflt_fdb_dump(struct sk_buff *skb, |
114 | struct netlink_callback *cb, | |
115 | struct net_device *dev, | |
5d5eacb3 | 116 | struct net_device *filter_dev, |
d297653d | 117 | int *idx); |
090096bf VY |
118 | extern int ndo_dflt_fdb_add(struct ndmsg *ndm, |
119 | struct nlattr *tb[], | |
120 | struct net_device *dev, | |
121 | const unsigned char *addr, | |
f6f6424b JP |
122 | u16 vid, |
123 | u16 flags); | |
090096bf VY |
124 | extern int ndo_dflt_fdb_del(struct ndmsg *ndm, |
125 | struct nlattr *tb[], | |
126 | struct net_device *dev, | |
f6f6424b JP |
127 | const unsigned char *addr, |
128 | u16 vid); | |
815cccbf JF |
129 | |
130 | extern int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, | |
2c3c031c | 131 | struct net_device *dev, u16 mode, |
7d4f8d87 SF |
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)); | |
1da177e4 | 137 | #endif /* __LINUX_RTNETLINK_H */ |