blob: b60b3846b9d165280d012f48d9d83e4017237ec6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
#ifndef __LINUX_NET_AFUNIX_H
#define __LINUX_NET_AFUNIX_H
extern void unix_inflight(struct file *fp);
extern void unix_notinflight(struct file *fp);
extern void unix_gc(void);
#define UNIX_HASH_SIZE 256
extern struct hlist_head unix_socket_table[UNIX_HASH_SIZE + 1];
extern rwlock_t unix_table_lock;
extern atomic_t unix_tot_inflight;
static inline struct sock *first_unix_socket(int *i)
{
for (*i = 0; *i <= UNIX_HASH_SIZE; (*i)++) {
if (!hlist_empty(&unix_socket_table[*i]))
return __sk_head(&unix_socket_table[*i]);
}
return NULL;
}
static inline struct sock *next_unix_socket(int *i, struct sock *s)
{
struct sock *next = sk_next(s);
/* More in this chain? */
if (next)
return next;
/* Look for next non-empty chain. */
for ((*i)++; *i <= UNIX_HASH_SIZE; (*i)++) {
if (!hlist_empty(&unix_socket_table[*i]))
return __sk_head(&unix_socket_table[*i]);
}
return NULL;
}
#define forall_unix_sockets(i, s) \
for (s = first_unix_socket(&(i)); s; s = next_unix_socket(&(i),(s)))
struct unix_address {
atomic_t refcnt;
int len;
unsigned hash;
struct sockaddr_un name[0];
};
struct unix_skb_parms {
struct ucred creds; /* Skb credentials */
struct scm_fp_list *fp; /* Passed files */
};
#define UNIXCB(skb) (*(struct unix_skb_parms*)&((skb)->cb))
#define UNIXCREDS(skb) (&UNIXCB((skb)).creds)
#define unix_state_rlock(s) read_lock(&unix_sk(s)->lock)
#define unix_state_runlock(s) read_unlock(&unix_sk(s)->lock)
#define unix_state_wlock(s) write_lock(&unix_sk(s)->lock)
#define unix_state_wunlock(s) write_unlock(&unix_sk(s)->lock)
#ifdef __KERNEL__
/* The AF_UNIX socket */
struct unix_sock {
/* WARNING: sk has to be the first member */
struct sock sk;
struct unix_address *addr;
struct dentry *dentry;
struct vfsmount *mnt;
struct semaphore readsem;
struct sock *peer;
struct sock *other;
struct sock *gc_tree;
atomic_t inflight;
rwlock_t lock;
wait_queue_head_t peer_wait;
};
#define unix_sk(__sk) ((struct unix_sock *)__sk)
#endif
#endif
|
