1 #ifndef __LINUX_NET_AFUNIX_H
2 #define __LINUX_NET_AFUNIX_H
4 #include <linux/socket.h>
6 #include <linux/mutex.h>
7 #include <linux/refcount.h>
10 void unix_inflight(struct user_struct *user, struct file *fp);
11 void unix_notinflight(struct user_struct *user, struct file *fp);
13 void wait_for_unix_gc(void);
14 struct sock *unix_get_socket(struct file *filp);
15 struct sock *unix_peer_get(struct sock *);
17 #define UNIX_HASH_SIZE 256
18 #define UNIX_HASH_BITS 8
20 extern unsigned int unix_tot_inflight;
21 extern spinlock_t unix_table_lock;
22 extern struct hlist_head unix_socket_table[2 * UNIX_HASH_SIZE];
28 struct sockaddr_un name[0];
31 struct unix_skb_parms {
32 struct pid *pid; /* Skb credentials */
35 struct scm_fp_list *fp; /* Passed files */
36 #ifdef CONFIG_SECURITY_NETWORK
37 u32 secid; /* Security ID */
42 #define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb))
44 #define unix_state_lock(s) spin_lock(&unix_sk(s)->lock)
45 #define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock)
46 #define unix_state_lock_nested(s) \
47 spin_lock_nested(&unix_sk(s)->lock, \
50 /* The AF_UNIX socket */
52 /* WARNING: sk has to be the first member */
54 struct unix_address *addr;
56 struct mutex iolock, bindlock;
58 struct list_head link;
59 atomic_long_t inflight;
61 unsigned long gc_flags;
62 #define UNIX_GC_CANDIDATE 0
63 #define UNIX_GC_MAYBE_CYCLE 1
64 struct socket_wq peer_wq;
65 wait_queue_entry_t peer_wake;
68 static inline struct unix_sock *unix_sk(const struct sock *sk)
70 return (struct unix_sock *)sk;
73 #define peer_wait peer_wq.wait
75 long unix_inq_len(struct sock *sk);
76 long unix_outq_len(struct sock *sk);
79 int unix_sysctl_register(struct net *net);
80 void unix_sysctl_unregister(struct net *net);
82 static inline int unix_sysctl_register(struct net *net) { return 0; }
83 static inline void unix_sysctl_unregister(struct net *net) {}