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 <linux/refcount.h>
8#include <net/sock.h>
9
10void unix_inflight(struct user_struct *user, struct file *fp);
11void unix_notinflight(struct user_struct *user, struct file *fp);
12void unix_gc(void);
13void wait_for_unix_gc(void);
14struct sock *unix_get_socket(struct file *filp);
15struct sock *unix_peer_get(struct sock *);
16
17#define UNIX_HASH_SIZE 256
18#define UNIX_HASH_BITS 8
19
20extern unsigned int unix_tot_inflight;
21extern spinlock_t unix_table_lock;
22extern struct hlist_head unix_socket_table[2 * UNIX_HASH_SIZE];
23
24struct unix_address {
25 refcount_t refcnt;
26 int len;
27 unsigned int hash;
28 struct sockaddr_un name[0];
29};
30
31struct unix_skb_parms {
32 struct pid *pid; /* Skb credentials */
33 kuid_t uid;
34 kgid_t gid;
35 struct scm_fp_list *fp; /* Passed files */
36#ifdef CONFIG_SECURITY_NETWORK
37 u32 secid; /* Security ID */
38#endif
39 u32 consumed;
40} __randomize_layout;
41
42#define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb))
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 iolock, bindlock;
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 wait_queue_entry_t peer_wake;
67};
68
69static inline struct unix_sock *unix_sk(const struct sock *sk)
70{
71 return (struct unix_sock *)sk;
72}
73
74#define peer_wait peer_wq.wait
75
76long unix_inq_len(struct sock *sk);
77long unix_outq_len(struct sock *sk);
78
79#ifdef CONFIG_SYSCTL
80int unix_sysctl_register(struct net *net);
81void unix_sysctl_unregister(struct net *net);
82#else
83static inline int unix_sysctl_register(struct net *net) { return 0; }
84static inline void unix_sysctl_unregister(struct net *net) {}
85#endif
86#endif