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);
14
15#define UNIX_HASH_SIZE 256
16
17extern unsigned int unix_tot_inflight;
18
19struct unix_address {
20 atomic_t refcnt;
21 int len;
22 unsigned hash;
23 struct sockaddr_un name[0];
24};
25
26struct unix_skb_parms {
27 struct pid *pid; /* Skb credentials */
28 const struct cred *cred;
29 struct scm_fp_list *fp; /* Passed files */
30#ifdef CONFIG_SECURITY_NETWORK
31 u32 secid; /* Security ID */
32#endif
33};
34
35#define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb))
36#define UNIXSID(skb) (&UNIXCB((skb)).secid)
37
38#define unix_state_lock(s) spin_lock(&unix_sk(s)->lock)
39#define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock)
40#define unix_state_lock_nested(s) \
41 spin_lock_nested(&unix_sk(s)->lock, \
42 SINGLE_DEPTH_NESTING)
43
44#ifdef __KERNEL__
45/* The AF_UNIX socket */
46struct unix_sock {
47 /* WARNING: sk has to be the first member */
48 struct sock sk;
49 struct unix_address *addr;
50 struct dentry *dentry;
51 struct vfsmount *mnt;
52 struct mutex readlock;
53 struct sock *peer;
54 struct sock *other;
55 struct list_head link;
56 atomic_long_t inflight;
57 spinlock_t lock;
58 unsigned int gc_candidate : 1;
59 unsigned int gc_maybe_cycle : 1;
60 unsigned char recursion_level;
61 struct socket_wq peer_wq;
62};
63#define unix_sk(__sk) ((struct unix_sock *)__sk)
64
65#define peer_wait peer_wq.wait
66
67#ifdef CONFIG_SYSCTL
68extern int unix_sysctl_register(struct net *net);
69extern void unix_sysctl_unregister(struct net *net);
70#else
71static inline int unix_sysctl_register(struct net *net) { return 0; }
72static inline void unix_sysctl_unregister(struct net *net) {}
73#endif
74#endif
75#endif