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