Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #ifndef _SOCK_REUSEPORT_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #define _SOCK_REUSEPORT_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <linux/filter.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) extern spinlock_t reuseport_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) struct sock_reuseport {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	struct rcu_head		rcu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	u16			max_socks;	/* length of socks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	u16			num_socks;	/* elements in socks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	/* The last synq overflow event timestamp of this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	 * reuse->socks[] group.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	unsigned int		synq_overflow_ts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	/* ID stays the same even after the size of socks[] grows. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	unsigned int		reuseport_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	unsigned int		bind_inany:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	unsigned int		has_conns:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	struct bpf_prog __rcu	*prog;		/* optional BPF sock selector */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	struct sock		*socks[];	/* array of sock pointers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) extern int reuseport_alloc(struct sock *sk, bool bind_inany);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) extern int reuseport_add_sock(struct sock *sk, struct sock *sk2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 			      bool bind_inany);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) extern void reuseport_detach_sock(struct sock *sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) extern struct sock *reuseport_select_sock(struct sock *sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 					  u32 hash,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 					  struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 					  int hdr_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) extern int reuseport_attach_prog(struct sock *sk, struct bpf_prog *prog);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) extern int reuseport_detach_prog(struct sock *sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static inline bool reuseport_has_conns(struct sock *sk, bool set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	struct sock_reuseport *reuse;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	bool ret = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	reuse = rcu_dereference(sk->sk_reuseport_cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	if (reuse) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		if (set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 			reuse->has_conns = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 		ret = reuse->has_conns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #endif  /* _SOCK_REUSEPORT_H */