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 */ 76