tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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#define UNIX_HASH_BITS 8
18
19extern unsigned int unix_tot_inflight;
20extern spinlock_t unix_table_lock;
21extern struct hlist_head unix_socket_table[2 * UNIX_HASH_SIZE];
22
23struct unix_address {
24 atomic_t refcnt;
25 int len;
26 unsigned int hash;
27 struct sockaddr_un name[0];
28};
29
30struct unix_skb_parms {
31 struct pid *pid; /* Skb credentials */
32 kuid_t uid;
33 kgid_t gid;
34 struct scm_fp_list *fp; /* Passed files */
35#ifdef CONFIG_SECURITY_NETWORK
36 u32 secid; /* Security ID */
37#endif
38};
39
40#define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb))
41#define UNIXSID(skb) (&UNIXCB((skb)).secid)
42
43#define unix_state_lock(s) spin_lock(&unix_sk(s)->lock)
44#define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock)
45#define unix_state_lock_nested(s) \
46 spin_lock_nested(&unix_sk(s)->lock, \
47 SINGLE_DEPTH_NESTING)
48
49/* The AF_UNIX socket */
50struct unix_sock {
51 /* WARNING: sk has to be the first member */
52 struct sock sk;
53 struct unix_address *addr;
54 struct path path;
55 struct mutex readlock;
56 struct sock *peer;
57 struct list_head link;
58 atomic_long_t inflight;
59 spinlock_t lock;
60 unsigned char recursion_level;
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};
66#define unix_sk(__sk) ((struct unix_sock *)__sk)
67
68#define peer_wait peer_wq.wait
69
70long unix_inq_len(struct sock *sk);
71long unix_outq_len(struct sock *sk);
72
73#ifdef CONFIG_SYSCTL
74extern int unix_sysctl_register(struct net *net);
75extern void unix_sysctl_unregister(struct net *net);
76#else
77static inline int unix_sysctl_register(struct net *net) { return 0; }
78static inline void unix_sysctl_unregister(struct net *net) {}
79#endif
80#endif