Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
5f5624cf PS |
2 | #include <linux/export.h> |
3 | #include <linux/icmpv6.h> | |
4 | #include <linux/mutex.h> | |
5 | #include <linux/netdevice.h> | |
6 | #include <linux/spinlock.h> | |
7 | ||
8 | #include <net/ipv6.h> | |
9 | ||
10 | #if IS_ENABLED(CONFIG_IPV6) | |
11 | ||
12 | static ip6_icmp_send_t __rcu *ip6_icmp_send; | |
13 | ||
14 | int inet6_register_icmp_sender(ip6_icmp_send_t *fn) | |
15 | { | |
16 | return (cmpxchg((ip6_icmp_send_t **)&ip6_icmp_send, NULL, fn) == NULL) ? | |
67ba4152 | 17 | 0 : -EBUSY; |
5f5624cf PS |
18 | } |
19 | EXPORT_SYMBOL(inet6_register_icmp_sender); | |
20 | ||
21 | int inet6_unregister_icmp_sender(ip6_icmp_send_t *fn) | |
22 | { | |
23 | int ret; | |
24 | ||
25 | ret = (cmpxchg((ip6_icmp_send_t **)&ip6_icmp_send, fn, NULL) == fn) ? | |
26 | 0 : -EINVAL; | |
27 | ||
28 | synchronize_net(); | |
29 | ||
30 | return ret; | |
31 | } | |
32 | EXPORT_SYMBOL(inet6_unregister_icmp_sender); | |
33 | ||
34 | void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info) | |
35 | { | |
36 | ip6_icmp_send_t *send; | |
37 | ||
38 | rcu_read_lock(); | |
39 | send = rcu_dereference(ip6_icmp_send); | |
40 | ||
41 | if (!send) | |
42 | goto out; | |
b1cadc1a | 43 | send(skb, type, code, info, NULL); |
5f5624cf PS |
44 | out: |
45 | rcu_read_unlock(); | |
46 | } | |
47 | EXPORT_SYMBOL(icmpv6_send); | |
48 | #endif |