include/linux/connector.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *      connector.h
   4  *
   5  * 2004-2005 Copyright (c) Evgeniy Polyakov <zbr@ioremap.net>
   6  * All rights reserved.
   7  */
   8 #ifndef __CONNECTOR_H
   9 #define __CONNECTOR_H
  10
  11
  12 #include <linux/refcount.h>
  13
  14 #include <linux/list.h>
  15 #include <linux/workqueue.h>
  16
  17 #include <net/sock.h>
  18 #include <uapi/linux/connector.h>
  19
  20 #define CN_CBQ_NAMELEN          32
  21
  22 struct cn_queue_dev {
  23         atomic_t refcnt;
  24         unsigned char name[CN_CBQ_NAMELEN];
  25
  26         struct list_head queue_list;
  27         spinlock_t queue_lock;
  28
  29         struct sock *nls;
  30 };
  31
  32 struct cn_callback_id {
  33         unsigned char name[CN_CBQ_NAMELEN];
  34         struct cb_id id;
  35 };
  36
  37 struct cn_callback_entry {
  38         struct list_head callback_entry;
  39         refcount_t refcnt;
  40         struct cn_queue_dev *pdev;
  41
  42         struct cn_callback_id id;
  43         void (*callback) (struct cn_msg *, struct netlink_skb_parms *);
  44
  45         u32 seq, group;
  46 };
  47
  48 struct cn_dev {
  49         struct cb_id id;
  50
  51         u32 seq, groups;
  52         struct sock *nls;
  53         void (*input) (struct sk_buff *skb);
  54
  55         struct cn_queue_dev *cbdev;
  56 };
  57
  58 int cn_add_callback(struct cb_id *id, const char *name,
  59                     void (*callback)(struct cn_msg *, struct netlink_skb_parms *));
  60 void cn_del_callback(struct cb_id *);
  61 int cn_netlink_send_mult(struct cn_msg *msg, u16 len, u32 portid, u32 group, gfp_t gfp_mask);
  62 int cn_netlink_send(struct cn_msg *msg, u32 portid, u32 group, gfp_t gfp_mask);
  63
  64 int cn_queue_add_callback(struct cn_queue_dev *dev, const char *name,
  65                           struct cb_id *id,
  66                           void (*callback)(struct cn_msg *, struct netlink_skb_parms *));
  67 void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id);
  68 void cn_queue_release_callback(struct cn_callback_entry *);
  69
  70 struct cn_queue_dev *cn_queue_alloc_dev(const char *name, struct sock *);
  71 void cn_queue_free_dev(struct cn_queue_dev *dev);
  72
  73 int cn_cb_equal(struct cb_id *, struct cb_id *);
  74
  75 #endif                          /* __CONNECTOR_H */