1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2ef456144SCraig Gallek #ifndef _SOCK_REUSEPORT_H 3ef456144SCraig Gallek #define _SOCK_REUSEPORT_H 4ef456144SCraig Gallek 5538950a1SCraig Gallek #include <linux/filter.h> 6538950a1SCraig Gallek #include <linux/skbuff.h> 7ef456144SCraig Gallek #include <linux/types.h> 8736b4602SMartin KaFai Lau #include <linux/spinlock.h> 9ef456144SCraig Gallek #include <net/sock.h> 10ef456144SCraig Gallek 11736b4602SMartin KaFai Lau extern spinlock_t reuseport_lock; 12736b4602SMartin KaFai Lau 13ef456144SCraig Gallek struct sock_reuseport { 14ef456144SCraig Gallek struct rcu_head rcu; 15ef456144SCraig Gallek 16ef456144SCraig Gallek u16 max_socks; /* length of socks */ 17ef456144SCraig Gallek u16 num_socks; /* elements in socks */ 1840a1227eSMartin KaFai Lau /* The last synq overflow event timestamp of this 1940a1227eSMartin KaFai Lau * reuse->socks[] group. 2040a1227eSMartin KaFai Lau */ 2140a1227eSMartin KaFai Lau unsigned int synq_overflow_ts; 22736b4602SMartin KaFai Lau /* ID stays the same even after the size of socks[] grows. */ 23736b4602SMartin KaFai Lau unsigned int reuseport_id; 24*acdcecc6SWillem de Bruijn unsigned int bind_inany:1; 25*acdcecc6SWillem de Bruijn unsigned int has_conns:1; 26538950a1SCraig Gallek struct bpf_prog __rcu *prog; /* optional BPF sock selector */ 27ef456144SCraig Gallek struct sock *socks[0]; /* array of sock pointers */ 28ef456144SCraig Gallek }; 29ef456144SCraig Gallek 302dbb9b9eSMartin KaFai Lau extern int reuseport_alloc(struct sock *sk, bool bind_inany); 312dbb9b9eSMartin KaFai Lau extern int reuseport_add_sock(struct sock *sk, struct sock *sk2, 322dbb9b9eSMartin KaFai Lau bool bind_inany); 33ef456144SCraig Gallek extern void reuseport_detach_sock(struct sock *sk); 34538950a1SCraig Gallek extern struct sock *reuseport_select_sock(struct sock *sk, 35538950a1SCraig Gallek u32 hash, 36538950a1SCraig Gallek struct sk_buff *skb, 37538950a1SCraig Gallek int hdr_len); 388217ca65SMartin KaFai Lau extern int reuseport_attach_prog(struct sock *sk, struct bpf_prog *prog); 3999f3a064SMartin KaFai Lau extern int reuseport_detach_prog(struct sock *sk); 4099f3a064SMartin KaFai Lau 41*acdcecc6SWillem de Bruijn static inline bool reuseport_has_conns(struct sock *sk, bool set) 42*acdcecc6SWillem de Bruijn { 43*acdcecc6SWillem de Bruijn struct sock_reuseport *reuse; 44*acdcecc6SWillem de Bruijn bool ret = false; 45*acdcecc6SWillem de Bruijn 46*acdcecc6SWillem de Bruijn rcu_read_lock(); 47*acdcecc6SWillem de Bruijn reuse = rcu_dereference(sk->sk_reuseport_cb); 48*acdcecc6SWillem de Bruijn if (reuse) { 49*acdcecc6SWillem de Bruijn if (set) 50*acdcecc6SWillem de Bruijn reuse->has_conns = 1; 51*acdcecc6SWillem de Bruijn ret = reuse->has_conns; 52*acdcecc6SWillem de Bruijn } 53*acdcecc6SWillem de Bruijn rcu_read_unlock(); 54*acdcecc6SWillem de Bruijn 55*acdcecc6SWillem de Bruijn return ret; 56*acdcecc6SWillem de Bruijn } 57*acdcecc6SWillem de Bruijn 58736b4602SMartin KaFai Lau int reuseport_get_id(struct sock_reuseport *reuse); 59ef456144SCraig Gallek 60ef456144SCraig Gallek #endif /* _SOCK_REUSEPORT_H */ 61