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1da177e4 LT |
1 | #ifndef __LINUX_NET_AFUNIX_H |
2 | #define __LINUX_NET_AFUNIX_H | |
3 | extern void unix_inflight(struct file *fp); | |
4 | extern void unix_notinflight(struct file *fp); | |
5 | extern void unix_gc(void); | |
6 | ||
7 | #define UNIX_HASH_SIZE 256 | |
8 | ||
9 | extern struct hlist_head unix_socket_table[UNIX_HASH_SIZE + 1]; | |
10 | extern rwlock_t unix_table_lock; | |
11 | ||
12 | extern atomic_t unix_tot_inflight; | |
13 | ||
14 | static 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 | ||
23 | static 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 | ||
40 | struct unix_address { | |
41 | atomic_t refcnt; | |
42 | int len; | |
43 | unsigned hash; | |
44 | struct sockaddr_un name[0]; | |
45 | }; | |
46 | ||
47 | struct 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 */ | |
62 | struct 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 |