include/net/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
  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 */