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/config.h>
5#include <linux/socket.h>
6#include <linux/un.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);
12
13#define UNIX_HASH_SIZE 256
14
15extern struct hlist_head unix_socket_table[UNIX_HASH_SIZE + 1];
16extern rwlock_t unix_table_lock;
17
18extern atomic_t unix_tot_inflight;
19
20static inline struct sock *first_unix_socket(int *i)
21{
22 for (*i = 0; *i <= UNIX_HASH_SIZE; (*i)++) {
23 if (!hlist_empty(&unix_socket_table[*i]))
24 return __sk_head(&unix_socket_table[*i]);
25 }
26 return NULL;
27}
28
29static inline struct sock *next_unix_socket(int *i, struct sock *s)
30{
31 struct sock *next = sk_next(s);
32 /* More in this chain? */
33 if (next)
34 return next;
35 /* Look for next non-empty chain. */
36 for ((*i)++; *i <= UNIX_HASH_SIZE; (*i)++) {
37 if (!hlist_empty(&unix_socket_table[*i]))
38 return __sk_head(&unix_socket_table[*i]);
39 }
40 return NULL;
41}
42
43#define forall_unix_sockets(i, s) \
44 for (s = first_unix_socket(&(i)); s; s = next_unix_socket(&(i),(s)))
45
46struct unix_address {
47 atomic_t refcnt;
48 int len;
49 unsigned hash;
50 struct sockaddr_un name[0];
51};
52
53struct unix_skb_parms {
54 struct ucred creds; /* Skb credentials */
55 struct scm_fp_list *fp; /* Passed files */
56};
57
58#define UNIXCB(skb) (*(struct unix_skb_parms*)&((skb)->cb))
59#define UNIXCREDS(skb) (&UNIXCB((skb)).creds)
60
61#define unix_state_rlock(s) read_lock(&unix_sk(s)->lock)
62#define unix_state_runlock(s) read_unlock(&unix_sk(s)->lock)
63#define unix_state_wlock(s) write_lock(&unix_sk(s)->lock)
64#define unix_state_wunlock(s) write_unlock(&unix_sk(s)->lock)
65
66#ifdef __KERNEL__
67/* The AF_UNIX socket */
68struct unix_sock {
69 /* WARNING: sk has to be the first member */
70 struct sock sk;
71 struct unix_address *addr;
72 struct dentry *dentry;
73 struct vfsmount *mnt;
74 struct semaphore readsem;
75 struct sock *peer;
76 struct sock *other;
77 struct sock *gc_tree;
78 atomic_t inflight;
79 rwlock_t lock;
80 wait_queue_head_t peer_wait;
81};
82#define unix_sk(__sk) ((struct unix_sock *)__sk)
83
84#ifdef CONFIG_SYSCTL
85extern int sysctl_unix_max_dgram_qlen;
86extern void unix_sysctl_register(void);
87extern void unix_sysctl_unregister(void);
88#else
89static inline void unix_sysctl_register(void) {}
90static inline void unix_sysctl_unregister(void) {}
91#endif
92#endif
93#endif