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(struct cn_msg *, u32, gfp_t);
  75
  76 int cn_queue_add_callback(struct cn_queue_dev *dev, const char *name,
  77                           struct cb_id *id,
  78                           void (*callback)(struct cn_msg *, struct netlink_skb_parms *));
  79 void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id);
  80 void cn_queue_release_callback(struct cn_callback_entry *);
  81
  82 struct cn_queue_dev *cn_queue_alloc_dev(const char *name, struct sock *);
  83 void cn_queue_free_dev(struct cn_queue_dev *dev);
  84
  85 int cn_cb_equal(struct cb_id *, struct cb_id *);
  86
  87 #endif                          /* __CONNECTOR_H */