/* * 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 <linux/types.h> /* * Process Events connector unique ids -- used for message routing */ #define CN_IDX_PROC 0x1 #define CN_VAL_PROC 0x1 #define CN_IDX_CIFS 0x2 #define CN_VAL_CIFS 0x1 #define CN_W1_IDX 0x3 /* w1 communication */ #define CN_W1_VAL 0x1 #define CN_IDX_V86D 0x4 #define CN_VAL_V86D_UVESAFB 0x1 #define CN_IDX_BB 0x5 /* BlackBoard, from the TSP GPL sampling framework */ #define CN_DST_IDX 0x6 #define CN_DST_VAL 0x1 #define CN_IDX_DM 0x7 /* Device Mapper */ #define CN_VAL_DM_USERSPACE_LOG 0x1 #define CN_IDX_DRBD 0x8 #define CN_VAL_DRBD 0x1 #define CN_NETLINK_USERS 8 /* * Maximum connector's message size. */ #define CONNECTOR_MAX_MSG_SIZE 16384 /* * 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]; }; #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; /* Sent to kevent to create cn_queue only when needed */ struct work_struct wq_creation; /* Tell if the wq_creation job is pending/completed */ atomic_t wq_requested; /* Wait for cn_queue to be created */ wait_queue_head_t wq_created; struct list_head queue_list; spinlock_t queue_lock; struct sock *nls; }; struct cn_callback_id { unsigned char name[CN_CBQ_NAMELEN]; struct cb_id id; }; struct cn_callback_data { struct sk_buff *skb; void (*callback) (struct cn_msg *, struct netlink_skb_parms *); void *free; }; struct cn_callback_entry { struct list_head callback_entry; struct work_struct work; struct cn_queue_dev *pdev; struct cn_callback_id id; struct cn_callback_data data; u32 seq, group; }; struct cn_dev { struct cb_id id; u32 seq, groups; struct sock *nls; void (*input) (struct sk_buff *skb); struct cn_queue_dev *cbdev; }; int cn_add_callback(struct cb_id *, char *, void (*callback) (struct cn_msg *, struct netlink_skb_parms *)); void cn_del_callback(struct cb_id *); int cn_netlink_send(struct cn_msg *, u32, gfp_t); int cn_queue_add_callback(struct cn_queue_dev *dev, char *name, struct cb_id *id, void (*callback)(struct cn_msg *, struct netlink_skb_parms *)); void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id); int queue_cn_work(struct cn_callback_entry *cbq, struct work_struct *work); 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 *); void cn_queue_wrapper(struct work_struct *work); #endif /* __KERNEL__ */ #endif /* __CONNECTOR_H */