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 void unix_inflight(struct user_struct *user, struct file *fp);
12 void unix_notinflight(struct user_struct *user, struct file *fp);
13 void unix_destruct_scm(struct sk_buff *skb);
14 void io_uring_destruct_scm(struct sk_buff *skb);
16 void wait_for_unix_gc(void);
17 struct sock *unix_get_socket(struct file *filp);
18 struct sock *unix_peer_get(struct sock *sk);
20 #define UNIX_HASH_MOD (256 - 1)
21 #define UNIX_HASH_SIZE (256 * 2)
22 #define UNIX_HASH_BITS 8
24 extern unsigned int unix_tot_inflight;
29 struct sockaddr_un name[];
32 struct unix_skb_parms {
33 struct pid *pid; /* Skb credentials */
36 struct scm_fp_list *fp; /* Passed files */
37 #ifdef CONFIG_SECURITY_NETWORK
38 u32 secid; /* Security ID */
47 #define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb))
49 #define unix_state_lock(s) spin_lock(&unix_sk(s)->lock)
50 #define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock)
51 #define unix_state_lock_nested(s) \
52 spin_lock_nested(&unix_sk(s)->lock, \
55 /* The AF_UNIX socket */
57 /* WARNING: sk has to be the first member */
59 struct unix_address *addr;
61 struct mutex iolock, bindlock;
63 struct list_head link;
64 atomic_long_t inflight;
66 unsigned long gc_flags;
67 #define UNIX_GC_CANDIDATE 0
68 #define UNIX_GC_MAYBE_CYCLE 1
69 struct socket_wq peer_wq;
70 wait_queue_entry_t peer_wake;
71 struct scm_stat scm_stat;
72 #if IS_ENABLED(CONFIG_AF_UNIX_OOB)
73 struct sk_buff *oob_skb;
77 #define unix_sk(ptr) container_of_const(ptr, struct unix_sock, sk)
79 #define peer_wait peer_wq.wait
81 long unix_inq_len(struct sock *sk);
82 long unix_outq_len(struct sock *sk);
84 int __unix_dgram_recvmsg(struct sock *sk, struct msghdr *msg, size_t size,
86 int __unix_stream_recvmsg(struct sock *sk, struct msghdr *msg, size_t size,
89 int unix_sysctl_register(struct net *net);
90 void unix_sysctl_unregister(struct net *net);
92 static inline int unix_sysctl_register(struct net *net) { return 0; }
93 static inline void unix_sysctl_unregister(struct net *net) {}
96 #ifdef CONFIG_BPF_SYSCALL
97 extern struct proto unix_dgram_proto;
98 extern struct proto unix_stream_proto;
100 int unix_dgram_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore);
101 int unix_stream_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore);
102 void __init unix_bpf_build_proto(void);
104 static inline void __init unix_bpf_build_proto(void)