1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _SOCK_REUSEPORT_H
3#define _SOCK_REUSEPORT_H
4
5#include <linux/filter.h>
6#include <linux/skbuff.h>
7#include <linux/types.h>
8#include <linux/spinlock.h>
9#include <net/sock.h>
10
11extern spinlock_t reuseport_lock;
12
13struct sock_reuseport {
14 struct rcu_head rcu;
15
16 u16 max_socks; /* length of socks */
17 u16 num_socks; /* elements in socks */
18 /* The last synq overflow event timestamp of this
19 * reuse->socks[] group.
20 */
21 unsigned int synq_overflow_ts;
22 /* ID stays the same even after the size of socks[] grows. */
23 unsigned int reuseport_id;
24 bool bind_inany;
25 struct bpf_prog __rcu *prog; /* optional BPF sock selector */
26 struct sock *socks[0]; /* array of sock pointers */
27};
28
29extern int reuseport_alloc(struct sock *sk, bool bind_inany);
30extern int reuseport_add_sock(struct sock *sk, struct sock *sk2,
31 bool bind_inany);
32extern void reuseport_detach_sock(struct sock *sk);
33extern struct sock *reuseport_select_sock(struct sock *sk,
34 u32 hash,
35 struct sk_buff *skb,
36 int hdr_len);
37extern int reuseport_attach_prog(struct sock *sk, struct bpf_prog *prog);
38int reuseport_get_id(struct sock_reuseport *reuse);
39
40#endif /* _SOCK_REUSEPORT_H */
41