LXR linux/include/net/sock

   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        bool                    bind_inany;
  25        struct bpf_prog __rcu   *prog;          /* optional BPF sock selector */
  26        struct sock             *socks[0];      /* array of sock pointers */
  27};
  28
  29extern int reuseport_alloc(struct sock *sk, bool bind_inany);
  30extern int reuseport_add_sock(struct sock *sk, struct sock *sk2,
  31                              bool bind_inany);
  32extern void reuseport_detach_sock(struct sock *sk);
  33extern struct sock *reuseport_select_sock(struct sock *sk,
  34                                          u32 hash,
  35                                          struct sk_buff *skb,
  36                                          int hdr_len);
  37extern int reuseport_attach_prog(struct sock *sk, struct bpf_prog *prog);
  38extern int reuseport_detach_prog(struct sock *sk);
  39
  40int reuseport_get_id(struct sock_reuseport *reuse);
  41
  42#endif  /* _SOCK_REUSEPORT_H */
  43