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Diffstat (limited to 'include/linux/connector.h')
| -rw-r--r-- | include/linux/connector.h | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/include/linux/connector.h b/include/linux/connector.h new file mode 100644 index 00000000000..96de26301f8 --- /dev/null +++ b/include/linux/connector.h @@ -0,0 +1,158 @@ +/* + * connector.h + * + * 2004-2005 Copyright (c) Evgeniy Polyakov <johnpol@2ka.mipt.ru> + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef __CONNECTOR_H +#define __CONNECTOR_H + +#include <asm/types.h> + +#define CN_IDX_CONNECTOR 0xffffffff +#define CN_VAL_CONNECTOR 0xffffffff + +#define CN_NETLINK_USERS 1 + +/* + * Maximum connector's message size. + */ +#define CONNECTOR_MAX_MSG_SIZE 1024 + +/* + * idx and val are unique identifiers which + * are used for message routing and + * must be registered in connector.h for in-kernel usage. + */ + +struct cb_id { + __u32 idx; + __u32 val; +}; + +struct cn_msg { + struct cb_id id; + + __u32 seq; + __u32 ack; + + __u16 len; /* Length of the following data */ + __u16 flags; + __u8 data[0]; +}; + +/* + * Notify structure - requests notification about + * registering/unregistering idx/val in range [first, first+range]. + */ +struct cn_notify_req { + __u32 first; + __u32 range; +}; + +/* + * Main notification control message + * *_notify_num - number of appropriate cn_notify_req structures after + * this struct. + * group - notification receiver's idx. + * len - total length of the attached data. + */ +struct cn_ctl_msg { + __u32 idx_notify_num; + __u32 val_notify_num; + __u32 group; + __u32 len; + __u8 data[0]; +}; + +#ifdef __KERNEL__ + +#include <asm/atomic.h> + +#include <linux/list.h> +#include <linux/workqueue.h> + +#include <net/sock.h> + +#define CN_CBQ_NAMELEN 32 + +struct cn_queue_dev { + atomic_t refcnt; + unsigned char name[CN_CBQ_NAMELEN]; + + struct workqueue_struct *cn_queue; + + struct list_head queue_list; + spinlock_t queue_lock; + + int netlink_groups; + struct sock *nls; +}; + +struct cn_callback { + unsigned char name[CN_CBQ_NAMELEN]; + + struct cb_id id; + void (*callback) (void *); + void *priv; +}; + +struct cn_callback_entry { + struct list_head callback_entry; + struct cn_callback *cb; + struct work_struct work; + struct cn_queue_dev *pdev; + + void (*destruct_data) (void *); + void *ddata; + + int seq, group; + struct sock *nls; +}; + +struct cn_ctl_entry { + struct list_head notify_entry; + struct cn_ctl_msg *msg; +}; + +struct cn_dev { + struct cb_id id; + + u32 seq, groups; + struct sock *nls; + void (*input) (struct sock * sk, int len); + + struct cn_queue_dev *cbdev; +}; + +int cn_add_callback(struct cb_id *, char *, void (*callback) (void *)); +void cn_del_callback(struct cb_id *); +int cn_netlink_send(struct cn_msg *, u32, int); + +int cn_queue_add_callback(struct cn_queue_dev *dev, struct cn_callback *cb); +void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id); + +struct cn_queue_dev *cn_queue_alloc_dev(char *name, struct sock *); +void cn_queue_free_dev(struct cn_queue_dev *dev); + +int cn_cb_equal(struct cb_id *, struct cb_id *); + +extern int cn_already_initialized; + +#endif /* __KERNEL__ */ +#endif /* __CONNECTOR_H */ |