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 */

 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	u16			num_closed_socks;	/* closed elements in socks */
19	u16			incoming_cpu;
20	/* The last synq overflow event timestamp of this
21	 * reuse->socks[] group.
22	 */
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 */
30};
31
32extern int reuseport_alloc(struct sock *sk, bool bind_inany);
33extern int reuseport_add_sock(struct sock *sk, struct sock *sk2,
34			      bool bind_inany);
35extern void reuseport_detach_sock(struct sock *sk);
36void reuseport_stop_listen_sock(struct sock *sk);
37extern struct sock *reuseport_select_sock(struct sock *sk,
38					  u32 hash,
39					  struct sk_buff *skb,
40					  int hdr_len);
41struct sock *reuseport_migrate_sock(struct sock *sk,
42				    struct sock *migrating_sk,
43				    struct sk_buff *skb);
44extern int reuseport_attach_prog(struct sock *sk, struct bpf_prog *prog);
45extern int reuseport_detach_prog(struct sock *sk);
46
47static inline bool reuseport_has_conns(struct sock *sk)
48{
49	struct sock_reuseport *reuse;
50	bool ret = false;
51
52	rcu_read_lock();
53	reuse = rcu_dereference(sk->sk_reuseport_cb);
54	if (reuse && reuse->has_conns)
55		ret = true;
 
 
 
56	rcu_read_unlock();
57
58	return ret;
59}
60
61void reuseport_has_conns_set(struct sock *sk);
62void reuseport_update_incoming_cpu(struct sock *sk, int val);
63
64#endif  /* _SOCK_REUSEPORT_H */