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
9void unix_inflight(struct file *fp);
10void unix_notinflight(struct file *fp);
11void unix_gc(void);
12void wait_for_unix_gc(void);
13struct sock *unix_get_socket(struct file *filp);
14struct 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 u32 consumed;
39};
40
41#define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb))
42#define UNIXSID(skb) (&UNIXCB((skb)).secid)
43
44#define unix_state_lock(s) spin_lock(&unix_sk(s)->lock)
45#define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock)
46#define unix_state_lock_nested(s) \
47 spin_lock_nested(&unix_sk(s)->lock, \
48 SINGLE_DEPTH_NESTING)
49
50/* The AF_UNIX socket */
51struct unix_sock {
52 /* WARNING: sk has to be the first member */
53 struct sock sk;
54 struct unix_address *addr;
55 struct path path;
56 struct mutex readlock;
57 struct sock *peer;
58 struct list_head link;
59 atomic_long_t inflight;
60 spinlock_t lock;
61 unsigned char recursion_level;
62 unsigned long gc_flags;
63#define UNIX_GC_CANDIDATE 0
64#define UNIX_GC_MAYBE_CYCLE 1
65 struct socket_wq peer_wq;
66};
67#define unix_sk(__sk) ((struct unix_sock *)__sk)
68
69#define peer_wait peer_wq.wait
70
71long unix_inq_len(struct sock *sk);
72long unix_outq_len(struct sock *sk);
73
74#ifdef CONFIG_SYSCTL
75int unix_sysctl_register(struct net *net);
76void unix_sysctl_unregister(struct net *net);
77#else
78static inline int unix_sysctl_register(struct net *net) { return 0; }
79static inline void unix_sysctl_unregister(struct net *net) {}
80#endif
81#endif