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 <net/sock.h>
 9
 
 
10struct sock_reuseport {
11	struct rcu_head		rcu;
12
13	u16			max_socks;	/* length of socks */
14	u16			num_socks;	/* elements in socks */
 
 
 
 
 
 
 
 
15	struct bpf_prog __rcu	*prog;		/* optional BPF sock selector */
16	struct sock		*socks[0];	/* array of sock pointers */
17};
18
19extern int reuseport_alloc(struct sock *sk);
20extern int reuseport_add_sock(struct sock *sk, struct sock *sk2);
 
21extern void reuseport_detach_sock(struct sock *sk);
22extern struct sock *reuseport_select_sock(struct sock *sk,
23					  u32 hash,
24					  struct sk_buff *skb,
25					  int hdr_len);
26extern struct bpf_prog *reuseport_attach_prog(struct sock *sk,
27					      struct bpf_prog *prog);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
28
29#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	/* 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 */