linux/include/net/af_unix.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_NET_AFUNIX_H
#define __LINUX_NET_AFUNIX_H

#include <linux/socket.h>
#include <linux/un.h>
#include <linux/mutex.h>
#include <linux/refcount.h>
#include <net/sock.h>

#if IS_ENABLED(CONFIG_UNIX)
struct unix_sock *unix_get_socket(struct file *filp);
#else
static inline struct unix_sock *unix_get_socket(struct file *filp)
{
	return NULL;
}
#endif

extern unsigned int unix_tot_inflight;
void unix_add_edges(struct scm_fp_list *fpl, struct unix_sock *receiver);
void unix_del_edges(struct scm_fp_list *fpl);
void unix_update_edges(struct unix_sock *receiver);
int unix_prepare_fpl(struct scm_fp_list *fpl);
void unix_destroy_fpl(struct scm_fp_list *fpl);
void unix_gc(void);
void wait_for_unix_gc(struct scm_fp_list *fpl);

struct unix_vertex { … };

struct unix_edge { … };

struct sock *unix_peer_get(struct sock *sk);

#define UNIX_HASH_MOD …
#define UNIX_HASH_SIZE …
#define UNIX_HASH_BITS …

struct unix_address { … };

struct unix_skb_parms { … } __randomize_layout;

struct scm_stat { … };

#define UNIXCB(skb) …

/* The AF_UNIX socket */
struct unix_sock { … };

#define unix_sk(ptr) …
#define unix_peer(sk) …

#define unix_state_lock(s) …
#define unix_state_unlock(s) …

#define peer_wait …

long unix_inq_len(struct sock *sk);
long unix_outq_len(struct sock *sk);

int __unix_dgram_recvmsg(struct sock *sk, struct msghdr *msg, size_t size,
			 int flags);
int __unix_stream_recvmsg(struct sock *sk, struct msghdr *msg, size_t size,
			  int flags);
#ifdef CONFIG_SYSCTL
int unix_sysctl_register(struct net *net);
void unix_sysctl_unregister(struct net *net);
#else
static inline int unix_sysctl_register(struct net *net) { return 0; }
static inline void unix_sysctl_unregister(struct net *net) {}
#endif

#ifdef CONFIG_BPF_SYSCALL
extern struct proto unix_dgram_proto;
extern struct proto unix_stream_proto;

int unix_dgram_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore);
int unix_stream_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore);
void __init unix_bpf_build_proto(void);
#else
static inline void __init unix_bpf_build_proto(void)
{}
#endif
#endif