1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __LINUX_NET_AFUNIX_H
3 #define __LINUX_NET_AFUNIX_H
5 #include <linux/socket.h>
7 #include <linux/mutex.h>
8 #include <linux/refcount.h>
11 #if IS_ENABLED(CONFIG_UNIX)
12 struct unix_sock *unix_get_socket(struct file *filp);
14 static inline struct unix_sock *unix_get_socket(struct file *filp)
20 extern unsigned int unix_tot_inflight;
21 void unix_add_edges(struct scm_fp_list *fpl, struct unix_sock *receiver);
22 void unix_del_edges(struct scm_fp_list *fpl);
23 void unix_update_edges(struct unix_sock *receiver);
24 int unix_prepare_fpl(struct scm_fp_list *fpl);
25 void unix_destroy_fpl(struct scm_fp_list *fpl);
27 void wait_for_unix_gc(struct scm_fp_list *fpl);
30 struct list_head edges;
31 struct list_head entry;
32 struct list_head scc_entry;
33 unsigned long out_degree;
35 unsigned long scc_index;
39 struct unix_sock *predecessor;
40 struct unix_sock *successor;
41 struct list_head vertex_entry;
42 struct list_head stack_entry;
45 struct sock *unix_peer_get(struct sock *sk);
47 #define UNIX_HASH_MOD (256 - 1)
48 #define UNIX_HASH_SIZE (256 * 2)
49 #define UNIX_HASH_BITS 8
54 struct sockaddr_un name[];
57 struct unix_skb_parms {
58 struct pid *pid; /* Skb credentials */
61 struct scm_fp_list *fp; /* Passed files */
62 #ifdef CONFIG_SECURITY_NETWORK
63 u32 secid; /* Security ID */
70 unsigned long nr_unix_fds;
73 #define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb))
75 /* The AF_UNIX socket */
77 /* WARNING: sk has to be the first member */
79 struct unix_address *addr;
81 struct mutex iolock, bindlock;
83 struct sock *listener;
84 struct unix_vertex *vertex;
86 struct socket_wq peer_wq;
87 wait_queue_entry_t peer_wake;
88 struct scm_stat scm_stat;
89 #if IS_ENABLED(CONFIG_AF_UNIX_OOB)
90 struct sk_buff *oob_skb;
94 #define unix_sk(ptr) container_of_const(ptr, struct unix_sock, sk)
95 #define unix_peer(sk) (unix_sk(sk)->peer)
97 #define unix_state_lock(s) spin_lock(&unix_sk(s)->lock)
98 #define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock)
100 #define peer_wait peer_wq.wait
102 long unix_inq_len(struct sock *sk);
103 long unix_outq_len(struct sock *sk);
105 int __unix_dgram_recvmsg(struct sock *sk, struct msghdr *msg, size_t size,
107 int __unix_stream_recvmsg(struct sock *sk, struct msghdr *msg, size_t size,
110 int unix_sysctl_register(struct net *net);
111 void unix_sysctl_unregister(struct net *net);
113 static inline int unix_sysctl_register(struct net *net) { return 0; }
114 static inline void unix_sysctl_unregister(struct net *net) {}
117 #ifdef CONFIG_BPF_SYSCALL
118 extern struct proto unix_dgram_proto;
119 extern struct proto unix_stream_proto;
121 int unix_dgram_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore);
122 int unix_stream_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore);
123 void __init unix_bpf_build_proto(void);
125 static inline void __init unix_bpf_build_proto(void)