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);
13
14#define UNIX_HASH_SIZE 256
15
16extern unsigned int unix_tot_inflight;
17
18struct unix_address {
19 atomic_t refcnt;
20 int len;
21 unsigned hash;
22 struct sockaddr_un name[0];
23};
24
25struct unix_skb_parms {
26 struct ucred creds; /* Skb credentials */
27 struct scm_fp_list *fp; /* Passed files */
28#ifdef CONFIG_SECURITY_NETWORK
29 u32 secid; /* Security ID */
30#endif
31};
32
33#define UNIXCB(skb) (*(struct unix_skb_parms*)&((skb)->cb))
34#define UNIXCREDS(skb) (&UNIXCB((skb)).creds)
35#define UNIXSID(skb) (&UNIXCB((skb)).secid)
36
37#define unix_state_lock(s) spin_lock(&unix_sk(s)->lock)
38#define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock)
39#define unix_state_lock_nested(s) \
40 spin_lock_nested(&unix_sk(s)->lock, \
41 SINGLE_DEPTH_NESTING)
42
43#ifdef __KERNEL__
44/* The AF_UNIX socket */
45struct unix_sock {
46 /* WARNING: sk has to be the first member */
47 struct sock sk;
48 struct unix_address *addr;
49 struct dentry *dentry;
50 struct vfsmount *mnt;
51 struct mutex readlock;
52 struct sock *peer;
53 struct sock *other;
54 struct list_head link;
55 atomic_long_t inflight;
56 spinlock_t lock;
57 unsigned int gc_candidate : 1;
58 unsigned int gc_maybe_cycle : 1;
59 wait_queue_head_t peer_wait;
60};
61#define unix_sk(__sk) ((struct unix_sock *)__sk)
62
63#ifdef CONFIG_SYSCTL
64extern int unix_sysctl_register(struct net *net);
65extern void unix_sysctl_unregister(struct net *net);
66#else
67static inline int unix_sysctl_register(struct net *net) { return 0; }
68static inline void unix_sysctl_unregister(struct net *net) {}
69#endif
70#endif
71#endif