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 u16 num_closed_socks; /* closed elements in socks */
20 /* The last synq overflow event timestamp of this
21 * reuse->socks[] group.
23 unsigned int synq_overflow_ts;
24 /* ID stays the same even after the size of socks[] grows. */
25 unsigned int reuseport_id;
26 unsigned int bind_inany:1;
27 unsigned int has_conns:1;
28 struct bpf_prog __rcu *prog; /* optional BPF sock selector */
29 struct sock *socks[]; /* array of sock pointers */
32 extern int reuseport_alloc(struct sock *sk, bool bind_inany);
33 extern int reuseport_add_sock(struct sock *sk, struct sock *sk2,
35 extern void reuseport_detach_sock(struct sock *sk);
36 void reuseport_stop_listen_sock(struct sock *sk);
37 extern struct sock *reuseport_select_sock(struct sock *sk,
41 struct sock *reuseport_migrate_sock(struct sock *sk,
42 struct sock *migrating_sk,
44 extern int reuseport_attach_prog(struct sock *sk, struct bpf_prog *prog);
45 extern int reuseport_detach_prog(struct sock *sk);
47 static inline bool reuseport_has_conns(struct sock *sk)
49 struct sock_reuseport *reuse;
53 reuse = rcu_dereference(sk->sk_reuseport_cb);
54 if (reuse && reuse->has_conns)
61 void reuseport_has_conns_set(struct sock *sk);
62 void reuseport_update_incoming_cpu(struct sock *sk, int val);
64 #endif /* _SOCK_REUSEPORT_H */