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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _SOCK_REUSEPORT_H
#define _SOCK_REUSEPORT_H
#include <linux/filter.h>
#include <linux/skbuff.h>
#include <linux/types.h>
#include <linux/spinlock.h>
#include <net/sock.h>
extern spinlock_t reuseport_lock;
struct sock_reuseport {
struct rcu_head rcu;
u16 max_socks; /* length of socks */
u16 num_socks; /* elements in socks */
u16 num_closed_socks; /* closed elements in socks */
u16 incoming_cpu;
/* The last synq overflow event timestamp of this
* reuse->socks[] group.
*/
unsigned int synq_overflow_ts;
/* ID stays the same even after the size of socks[] grows. */
unsigned int reuseport_id;
unsigned int bind_inany:1;
unsigned int has_conns:1;
struct bpf_prog __rcu *prog; /* optional BPF sock selector */
struct sock *socks[]; /* array of sock pointers */
};
extern int reuseport_alloc(struct sock *sk, bool bind_inany);
extern int reuseport_add_sock(struct sock *sk, struct sock *sk2,
bool bind_inany);
extern void reuseport_detach_sock(struct sock *sk);
void reuseport_stop_listen_sock(struct sock *sk);
extern struct sock *reuseport_select_sock(struct sock *sk,
u32 hash,
struct sk_buff *skb,
int hdr_len);
struct sock *reuseport_migrate_sock(struct sock *sk,
struct sock *migrating_sk,
struct sk_buff *skb);
extern int reuseport_attach_prog(struct sock *sk, struct bpf_prog *prog);
extern int reuseport_detach_prog(struct sock *sk);
static inline bool reuseport_has_conns(struct sock *sk)
{
struct sock_reuseport *reuse;
bool ret = false;
rcu_read_lock();
reuse = rcu_dereference(sk->sk_reuseport_cb);
if (reuse && reuse->has_conns)
ret = true;
rcu_read_unlock();
return ret;
}
void reuseport_has_conns_set(struct sock *sk);
void reuseport_update_incoming_cpu(struct sock *sk, int val);
#endif /* _SOCK_REUSEPORT_H */