linux/include/linux/connector.h
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   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
  35struct 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
  45struct cn_callback_id {
  46        unsigned char name[CN_CBQ_NAMELEN];
  47        struct cb_id id;
  48};
  49
  50struct 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
  61struct 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
  71int cn_add_callback(struct cb_id *id, const char *name,
  72                    void (*callback)(struct cn_msg *, struct netlink_skb_parms *));
  73void cn_del_callback(struct cb_id *);
  74int cn_netlink_send(struct cn_msg *, u32, gfp_t);
  75
  76int 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 *));
  79void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id);
  80void cn_queue_release_callback(struct cn_callback_entry *);
  81
  82struct cn_queue_dev *cn_queue_alloc_dev(const char *name, struct sock *);
  83void cn_queue_free_dev(struct cn_queue_dev *dev);
  84
  85int cn_cb_equal(struct cb_id *, struct cb_id *);
  86
  87#endif                          /* __CONNECTOR_H */
  88
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