1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _SOCK_REUSEPORT_H
3 #define _SOCK_REUSEPORT_H
5 #include <linux/filter.h>
6 #include <linux/skbuff.h>
7 #include <linux/types.h>
8 #include <linux/spinlock.h>
11 extern spinlock_t reuseport_lock;
13 struct sock_reuseport {
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.
21 unsigned int synq_overflow_ts;
22 /* ID stays the same even after the size of socks[] grows. */
23 unsigned int reuseport_id;
25 struct bpf_prog __rcu *prog; /* optional BPF sock selector */
26 struct sock *socks[0]; /* array of sock pointers */
29 extern int reuseport_alloc(struct sock *sk, bool bind_inany);
30 extern int reuseport_add_sock(struct sock *sk, struct sock *sk2,
32 extern void reuseport_detach_sock(struct sock *sk);
33 extern struct sock *reuseport_select_sock(struct sock *sk,
37 extern int reuseport_attach_prog(struct sock *sk, struct bpf_prog *prog);
38 int reuseport_get_id(struct sock_reuseport *reuse);
40 #endif /* _SOCK_REUSEPORT_H */