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 spinlock_t unix_gc_lock;
21 extern unsigned int unix_tot_inflight;
23 void unix_inflight(struct user_struct *user, struct file *fp);
24 void unix_notinflight(struct user_struct *user, struct file *fp);
26 void wait_for_unix_gc(struct scm_fp_list *fpl);
28 struct sock *unix_peer_get(struct sock *sk);
30 #define UNIX_HASH_MOD (256 - 1)
31 #define UNIX_HASH_SIZE (256 * 2)
32 #define UNIX_HASH_BITS 8
37 struct sockaddr_un name[];
40 struct unix_skb_parms {
41 struct pid *pid; /* Skb credentials */
44 struct scm_fp_list *fp; /* Passed files */
45 #ifdef CONFIG_SECURITY_NETWORK
46 u32 secid; /* Security ID */
55 #define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb))
57 /* The AF_UNIX socket */
59 /* WARNING: sk has to be the first member */
61 struct unix_address *addr;
63 struct mutex iolock, bindlock;
65 struct list_head link;
66 unsigned long inflight;
68 unsigned long gc_flags;
69 #define UNIX_GC_CANDIDATE 0
70 #define UNIX_GC_MAYBE_CYCLE 1
71 struct socket_wq peer_wq;
72 wait_queue_entry_t peer_wake;
73 struct scm_stat scm_stat;
74 #if IS_ENABLED(CONFIG_AF_UNIX_OOB)
75 struct sk_buff *oob_skb;
79 #define unix_sk(ptr) container_of_const(ptr, struct unix_sock, sk)
80 #define unix_peer(sk) (unix_sk(sk)->peer)
82 #define unix_state_lock(s) spin_lock(&unix_sk(s)->lock)
83 #define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock)
84 enum unix_socket_lock_class {
86 U_LOCK_SECOND, /* for double locking, see unix_state_double_lock(). */
87 U_LOCK_DIAG, /* used while dumping icons, see sk_diag_dump_icons(). */
90 static inline void unix_state_lock_nested(struct sock *sk,
91 enum unix_socket_lock_class subclass)
93 spin_lock_nested(&unix_sk(sk)->lock, subclass);
96 #define peer_wait peer_wq.wait
98 long unix_inq_len(struct sock *sk);
99 long unix_outq_len(struct sock *sk);
101 int __unix_dgram_recvmsg(struct sock *sk, struct msghdr *msg, size_t size,
103 int __unix_stream_recvmsg(struct sock *sk, struct msghdr *msg, size_t size,
106 int unix_sysctl_register(struct net *net);
107 void unix_sysctl_unregister(struct net *net);
109 static inline int unix_sysctl_register(struct net *net) { return 0; }
110 static inline void unix_sysctl_unregister(struct net *net) {}
113 #ifdef CONFIG_BPF_SYSCALL
114 extern struct proto unix_dgram_proto;
115 extern struct proto unix_stream_proto;
117 int unix_dgram_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore);
118 int unix_stream_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore);
119 void __init unix_bpf_build_proto(void);
121 static inline void __init unix_bpf_build_proto(void)