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[mirror_ubuntu-artful-kernel.git] / include / linux / connector.h
1 /*
2 * connector.h
3 *
4 * 2004-2005 Copyright (c) Evgeniy Polyakov <zbr@ioremap.net>
5 * All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21 #ifndef __CONNECTOR_H
22 #define __CONNECTOR_H
23
24
25 #include <linux/atomic.h>
26
27 #include <linux/list.h>
28 #include <linux/workqueue.h>
29
30 #include <net/sock.h>
31 #include <uapi/linux/connector.h>
32
33 #define CN_CBQ_NAMELEN 32
34
35 struct cn_queue_dev {
36 atomic_t refcnt;
37 unsigned char name[CN_CBQ_NAMELEN];
38
39 struct list_head queue_list;
40 spinlock_t queue_lock;
41
42 struct sock *nls;
43 };
44
45 struct cn_callback_id {
46 unsigned char name[CN_CBQ_NAMELEN];
47 struct cb_id id;
48 };
49
50 struct cn_callback_entry {
51 struct list_head callback_entry;
52 atomic_t refcnt;
53 struct cn_queue_dev *pdev;
54
55 struct cn_callback_id id;
56 void (*callback) (struct cn_msg *, struct netlink_skb_parms *);
57
58 u32 seq, group;
59 };
60
61 struct cn_dev {
62 struct cb_id id;
63
64 u32 seq, groups;
65 struct sock *nls;
66 void (*input) (struct sk_buff *skb);
67
68 struct cn_queue_dev *cbdev;
69 };
70
71 int cn_add_callback(struct cb_id *id, const char *name,
72 void (*callback)(struct cn_msg *, struct netlink_skb_parms *));
73 void cn_del_callback(struct cb_id *);
74 int cn_netlink_send_mult(struct cn_msg *msg, u16 len, u32 portid, u32 group, gfp_t gfp_mask);
75 int cn_netlink_send(struct cn_msg *msg, u32 portid, u32 group, gfp_t gfp_mask);
76
77 int cn_queue_add_callback(struct cn_queue_dev *dev, const char *name,
78 struct cb_id *id,
79 void (*callback)(struct cn_msg *, struct netlink_skb_parms *));
80 void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id);
81 void cn_queue_release_callback(struct cn_callback_entry *);
82
83 struct cn_queue_dev *cn_queue_alloc_dev(const char *name, struct sock *);
84 void cn_queue_free_dev(struct cn_queue_dev *dev);
85
86 int cn_cb_equal(struct cb_id *, struct cb_id *);
87
88 #endif /* __CONNECTOR_H */