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1da177e4 LT |
1 | #ifndef __LINUX_NET_AFUNIX_H |
2 | #define __LINUX_NET_AFUNIX_H | |
20380731 | 3 | |
20380731 ACM |
4 | #include <linux/socket.h> |
5 | #include <linux/un.h> | |
57b47a53 | 6 | #include <linux/mutex.h> |
20380731 ACM |
7 | #include <net/sock.h> |
8 | ||
1da177e4 LT |
9 | extern void unix_inflight(struct file *fp); |
10 | extern void unix_notinflight(struct file *fp); | |
11 | extern void unix_gc(void); | |
12 | ||
13 | #define UNIX_HASH_SIZE 256 | |
14 | ||
15 | extern struct hlist_head unix_socket_table[UNIX_HASH_SIZE + 1]; | |
fbe9cc4a | 16 | extern spinlock_t unix_table_lock; |
1da177e4 LT |
17 | |
18 | extern atomic_t unix_tot_inflight; | |
19 | ||
20 | static 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 | ||
29 | static 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 | ||
46 | struct unix_address { | |
47 | atomic_t refcnt; | |
48 | int len; | |
49 | unsigned hash; | |
50 | struct sockaddr_un name[0]; | |
51 | }; | |
52 | ||
53 | struct unix_skb_parms { | |
54 | struct ucred creds; /* Skb credentials */ | |
55 | struct scm_fp_list *fp; /* Passed files */ | |
877ce7c1 | 56 | #ifdef CONFIG_SECURITY_NETWORK |
dc49c1f9 | 57 | u32 secid; /* Security ID */ |
877ce7c1 | 58 | #endif |
1da177e4 LT |
59 | }; |
60 | ||
61 | #define UNIXCB(skb) (*(struct unix_skb_parms*)&((skb)->cb)) | |
62 | #define UNIXCREDS(skb) (&UNIXCB((skb)).creds) | |
dc49c1f9 | 63 | #define UNIXSID(skb) (&UNIXCB((skb)).secid) |
1da177e4 | 64 | |
1c92b4e5 DM |
65 | #define unix_state_lock(s) spin_lock(&unix_sk(s)->lock) |
66 | #define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock) | |
67 | #define unix_state_lock_nested(s) \ | |
a09785a2 IM |
68 | spin_lock_nested(&unix_sk(s)->lock, \ |
69 | SINGLE_DEPTH_NESTING) | |
1da177e4 LT |
70 | |
71 | #ifdef __KERNEL__ | |
72 | /* The AF_UNIX socket */ | |
73 | struct unix_sock { | |
74 | /* WARNING: sk has to be the first member */ | |
75 | struct sock sk; | |
76 | struct unix_address *addr; | |
77 | struct dentry *dentry; | |
78 | struct vfsmount *mnt; | |
57b47a53 | 79 | struct mutex readlock; |
1da177e4 LT |
80 | struct sock *peer; |
81 | struct sock *other; | |
1fd05ba5 | 82 | struct list_head link; |
1da177e4 | 83 | atomic_t inflight; |
fd19f329 | 84 | spinlock_t lock; |
1fd05ba5 | 85 | unsigned int gc_candidate : 1; |
1da177e4 LT |
86 | wait_queue_head_t peer_wait; |
87 | }; | |
88 | #define unix_sk(__sk) ((struct unix_sock *)__sk) | |
20380731 ACM |
89 | |
90 | #ifdef CONFIG_SYSCTL | |
91 | extern int sysctl_unix_max_dgram_qlen; | |
92 | extern void unix_sysctl_register(void); | |
93 | extern void unix_sysctl_unregister(void); | |
94 | #else | |
95 | static inline void unix_sysctl_register(void) {} | |
96 | static inline void unix_sysctl_unregister(void) {} | |
97 | #endif | |
1da177e4 LT |
98 | #endif |
99 | #endif |