1 #ifndef __LINUX_NET_AFUNIX_H
2 #define __LINUX_NET_AFUNIX_H
4 #include <linux/socket.h>
6 #include <linux/mutex.h>
9 extern void unix_inflight(struct file *fp);
10 extern void unix_notinflight(struct file *fp);
11 extern void unix_gc(void);
12 extern void wait_for_unix_gc(void);
13 extern struct sock *unix_get_socket(struct file *filp);
14 extern struct sock *unix_peer_get(struct sock *);
16 #define UNIX_HASH_SIZE 256
17 #define UNIX_HASH_BITS 8
19 extern unsigned int unix_tot_inflight;
20 extern spinlock_t unix_table_lock;
21 extern struct hlist_head unix_socket_table[2 * UNIX_HASH_SIZE];
27 struct sockaddr_un name[0];
30 struct unix_skb_parms {
31 struct pid *pid; /* Skb credentials */
32 const struct cred *cred;
33 struct scm_fp_list *fp; /* Passed files */
34 #ifdef CONFIG_SECURITY_NETWORK
35 u32 secid; /* Security ID */
39 #define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb))
40 #define UNIXSID(skb) (&UNIXCB((skb)).secid)
42 #define unix_state_lock(s) spin_lock(&unix_sk(s)->lock)
43 #define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock)
44 #define unix_state_lock_nested(s) \
45 spin_lock_nested(&unix_sk(s)->lock, \
48 /* The AF_UNIX socket */
50 /* WARNING: sk has to be the first member */
52 struct unix_address *addr;
54 struct mutex readlock;
57 struct list_head link;
58 atomic_long_t inflight;
60 unsigned int gc_candidate : 1;
61 unsigned int gc_maybe_cycle : 1;
62 unsigned char recursion_level;
63 struct socket_wq peer_wq;
65 #define unix_sk(__sk) ((struct unix_sock *)__sk)
67 #define peer_wait peer_wq.wait
69 long unix_inq_len(struct sock *sk);
70 long unix_outq_len(struct sock *sk);
73 extern int unix_sysctl_register(struct net *net);
74 extern void unix_sysctl_unregister(struct net *net);
76 static inline int unix_sysctl_register(struct net *net) { return 0; }
77 static inline void unix_sysctl_unregister(struct net *net) {}