1 #ifndef __LINUX_NET_AFUNIX_H
2 #define __LINUX_NET_AFUNIX_H
4 #include <linux/socket.h>
6 #include <linux/mutex.h>
9 extern void unix_inflight(struct file
*fp
);
10 extern void unix_notinflight(struct file
*fp
);
11 extern void unix_gc(void);
12 extern void wait_for_unix_gc(void);
14 #define UNIX_HASH_SIZE 256
16 extern struct hlist_head unix_socket_table
[UNIX_HASH_SIZE
+ 1];
17 extern spinlock_t unix_table_lock
;
19 extern atomic_t unix_tot_inflight
;
21 static inline struct sock
*first_unix_socket(int *i
)
23 for (*i
= 0; *i
<= UNIX_HASH_SIZE
; (*i
)++) {
24 if (!hlist_empty(&unix_socket_table
[*i
]))
25 return __sk_head(&unix_socket_table
[*i
]);
30 static inline struct sock
*next_unix_socket(int *i
, struct sock
*s
)
32 struct sock
*next
= sk_next(s
);
33 /* More in this chain? */
36 /* Look for next non-empty chain. */
37 for ((*i
)++; *i
<= UNIX_HASH_SIZE
; (*i
)++) {
38 if (!hlist_empty(&unix_socket_table
[*i
]))
39 return __sk_head(&unix_socket_table
[*i
]);
44 #define forall_unix_sockets(i, s) \
45 for (s = first_unix_socket(&(i)); s; s = next_unix_socket(&(i),(s)))
51 struct sockaddr_un name
[0];
54 struct unix_skb_parms
{
55 struct ucred creds
; /* Skb credentials */
56 struct scm_fp_list
*fp
; /* Passed files */
57 #ifdef CONFIG_SECURITY_NETWORK
58 u32 secid
; /* Security ID */
62 #define UNIXCB(skb) (*(struct unix_skb_parms*)&((skb)->cb))
63 #define UNIXCREDS(skb) (&UNIXCB((skb)).creds)
64 #define UNIXSID(skb) (&UNIXCB((skb)).secid)
66 #define unix_state_lock(s) spin_lock(&unix_sk(s)->lock)
67 #define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock)
68 #define unix_state_lock_nested(s) \
69 spin_lock_nested(&unix_sk(s)->lock, \
73 /* The AF_UNIX socket */
75 /* WARNING: sk has to be the first member */
77 struct unix_address
*addr
;
78 struct dentry
*dentry
;
80 struct mutex readlock
;
83 struct list_head link
;
86 unsigned int gc_candidate
: 1;
87 unsigned int gc_maybe_cycle
: 1;
88 wait_queue_head_t peer_wait
;
90 #define unix_sk(__sk) ((struct unix_sock *)__sk)
93 extern int sysctl_unix_max_dgram_qlen
;
94 extern void unix_sysctl_register(void);
95 extern void unix_sysctl_unregister(void);
97 static inline void unix_sysctl_register(void) {}
98 static inline void unix_sysctl_unregister(void) {}