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Linux kernel mirror (for testing)
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kernel
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linux
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 unsigned int bind_inany:1;
25 unsigned int has_conns:1;
26 struct bpf_prog __rcu *prog; /* optional BPF sock selector */
27 struct sock *socks[0]; /* array of sock pointers */
28};
29
30extern int reuseport_alloc(struct sock *sk, bool bind_inany);
31extern int reuseport_add_sock(struct sock *sk, struct sock *sk2,
32 bool bind_inany);
33extern void reuseport_detach_sock(struct sock *sk);
34extern struct sock *reuseport_select_sock(struct sock *sk,
35 u32 hash,
36 struct sk_buff *skb,
37 int hdr_len);
38extern int reuseport_attach_prog(struct sock *sk, struct bpf_prog *prog);
39extern int reuseport_detach_prog(struct sock *sk);
40
41static inline bool reuseport_has_conns(struct sock *sk, bool set)
42{
43 struct sock_reuseport *reuse;
44 bool ret = false;
45
46 rcu_read_lock();
47 reuse = rcu_dereference(sk->sk_reuseport_cb);
48 if (reuse) {
49 if (set)
50 reuse->has_conns = 1;
51 ret = reuse->has_conns;
52 }
53 rcu_read_unlock();
54
55 return ret;
56}
57
58int reuseport_get_id(struct sock_reuseport *reuse);
59
60#endif /* _SOCK_REUSEPORT_H */