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Linux/include/net/sock_reuseport.h

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  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 

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