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 11 extern spinlock_t reuseport_lock; 12 13 struct 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 bool bind_inany; 25 struct bpf_prog __rcu *prog; /* optional BPF sock selector */ 26 struct sock *socks[0]; /* array of sock pointers */ 27 }; 28 29 extern int reuseport_alloc(struct sock *sk, bool bind_inany); 30 extern int reuseport_add_sock(struct sock *sk, struct sock *sk2, 31 bool bind_inany); 32 extern void reuseport_detach_sock(struct sock *sk); 33 extern struct sock *reuseport_select_sock(struct sock *sk, 34 u32 hash, 35 struct sk_buff *skb, 36 int hdr_len); 37 extern int reuseport_attach_prog(struct sock *sk, struct bpf_prog *prog); 38 int reuseport_get_id(struct sock_reuseport *reuse); 39 40 #endif /* _SOCK_REUSEPORT_H */ 41