LXR linux/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
  22struct 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
  32struct cn_callback_id {
  33        unsigned char name[CN_CBQ_NAMELEN];
  34        struct cb_id id;
  35};
  36
  37struct 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
  48struct 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
  58int cn_add_callback(struct cb_id *id, const char *name,
  59                    void (*callback)(struct cn_msg *, struct netlink_skb_parms *));
  60void cn_del_callback(struct cb_id *);
  61int cn_netlink_send_mult(struct cn_msg *msg, u16 len, u32 portid, u32 group, gfp_t gfp_mask);
  62int cn_netlink_send(struct cn_msg *msg, u32 portid, u32 group, gfp_t gfp_mask);
  63
  64int 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 *));
  67void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id);
  68void cn_queue_release_callback(struct cn_callback_entry *);
  69
  70struct cn_queue_dev *cn_queue_alloc_dev(const char *name, struct sock *);
  71void cn_queue_free_dev(struct cn_queue_dev *dev);
  72
  73int cn_cb_equal(struct cb_id *, struct cb_id *);
  74
  75#endif                          /* __CONNECTOR_H */
  76