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192.168.1.100 / R306 / 824eb0c6ade808c4501e62fbcf0025f4e694cd11 / . / ap / os / linux / linux-3.4.x / include / net / af_unix.h
blob: ca68e2cef23027fc545d3f649e48e68361620f12 [file] [log] [blame]
yuezonghe824eb0c2024-06-27 02:32:26 -0700[diff] [blame^]1#ifndef __LINUX_NET_AFUNIX_H
2#define __LINUX_NET_AFUNIX_H
3
4#include <linux/socket.h>
5#include <linux/un.h>
6#include <linux/mutex.h>
7#include <net/sock.h>
8
9extern void unix_inflight(struct file *fp);
10extern void unix_notinflight(struct file *fp);
11extern void unix_gc(void);
12extern void wait_for_unix_gc(void);
13extern struct sock *unix_get_socket(struct file *filp);
14extern struct sock *unix_peer_get(struct sock *);
15
16#define UNIX_HASH_SIZE 256
17
18extern unsigned int unix_tot_inflight;
19extern spinlock_t unix_table_lock;
20extern struct hlist_head unix_socket_table[UNIX_HASH_SIZE + 1];
21
22struct unix_address {
23 atomic_t refcnt;
24 int len;
25 unsigned hash;
26 struct sockaddr_un name[0];
27};
28
29struct unix_skb_parms {
30 struct pid *pid; /* Skb credentials */
31 const struct cred *cred;
32 struct scm_fp_list *fp; /* Passed files */
33#ifdef CONFIG_SECURITY_NETWORK
34 u32 secid; /* Security ID */
35#endif
36};
37
38#define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb))
39#define UNIXSID(skb) (&UNIXCB((skb)).secid)
40
41#define unix_state_lock(s) spin_lock(&unix_sk(s)->lock)
42#define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock)
43#define unix_state_lock_nested(s) \
44 spin_lock_nested(&unix_sk(s)->lock, \
45 SINGLE_DEPTH_NESTING)
46
47/* The AF_UNIX socket */
48struct unix_sock {
49 /* WARNING: sk has to be the first member */
50 struct sock sk;
51 struct unix_address *addr;
52 struct path path;
53 struct mutex readlock;
54 struct sock *peer;
55 struct sock *other;
56 struct list_head link;
57 atomic_long_t inflight;
58 spinlock_t lock;
59 unsigned int gc_candidate : 1;
60 unsigned int gc_maybe_cycle : 1;
61 unsigned char recursion_level;
62 struct socket_wq peer_wq;
63};
64#define unix_sk(__sk) ((struct unix_sock *)__sk)
65
66#define peer_wait peer_wq.wait
67
68long unix_inq_len(struct sock *sk);
69long unix_outq_len(struct sock *sk);
70
71#ifdef CONFIG_SYSCTL
72extern int unix_sysctl_register(struct net *net);
73extern void unix_sysctl_unregister(struct net *net);
74#else
75static inline int unix_sysctl_register(struct net *net) { return 0; }
76static inline void unix_sysctl_unregister(struct net *net) {}
77#endif
78#endif