4 * 2004-2005 Copyright (c) Evgeniy Polyakov <johnpol@2ka.mipt.ru>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include <linux/types.h>
28 * Process Events connector unique ids -- used for message routing
30 #define CN_IDX_PROC 0x1
31 #define CN_VAL_PROC 0x1
32 #define CN_IDX_CIFS 0x2
33 #define CN_VAL_CIFS 0x1
34 #define CN_W1_IDX 0x3 /* w1 communication */
36 #define CN_IDX_V86D 0x4
37 #define CN_VAL_V86D_UVESAFB 0x1
38 #define CN_IDX_BB 0x5 /* BlackBoard, from the TSP GPL sampling framework */
39 #define CN_DST_IDX 0x6
40 #define CN_DST_VAL 0x1
41 #define CN_IDX_DM 0x7 /* Device Mapper */
42 #define CN_VAL_DM_USERSPACE_LOG 0x1
43 #define CN_IDX_DRBD 0x8
44 #define CN_VAL_DRBD 0x1
46 #define CN_NETLINK_USERS 8
49 * Maximum connector's message size.
51 #define CONNECTOR_MAX_MSG_SIZE 16384
54 * idx and val are unique identifiers which
55 * are used for message routing and
56 * must be registered in connector.h for in-kernel usage.
70 __u16 len; /* Length of the following data */
77 #include <asm/atomic.h>
79 #include <linux/list.h>
80 #include <linux/workqueue.h>
84 #define CN_CBQ_NAMELEN 32
88 unsigned char name[CN_CBQ_NAMELEN];
90 struct workqueue_struct *cn_queue;
91 /* Sent to kevent to create cn_queue only when needed */
92 struct work_struct wq_creation;
93 /* Tell if the wq_creation job is pending/completed */
94 atomic_t wq_requested;
95 /* Wait for cn_queue to be created */
96 wait_queue_head_t wq_created;
98 struct list_head queue_list;
99 spinlock_t queue_lock;
104 struct cn_callback_id {
105 unsigned char name[CN_CBQ_NAMELEN];
109 struct cn_callback_data {
111 void (*callback) (struct cn_msg *, struct netlink_skb_parms *);
116 struct cn_callback_entry {
117 struct list_head callback_entry;
118 struct work_struct work;
119 struct cn_queue_dev *pdev;
121 struct cn_callback_id id;
122 struct cn_callback_data data;
132 void (*input) (struct sk_buff *skb);
134 struct cn_queue_dev *cbdev;
137 int cn_add_callback(struct cb_id *, char *, void (*callback) (struct cn_msg *, struct netlink_skb_parms *));
138 void cn_del_callback(struct cb_id *);
139 int cn_netlink_send(struct cn_msg *, u32, gfp_t);
141 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 *));
142 void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id);
144 int queue_cn_work(struct cn_callback_entry *cbq, struct work_struct *work);
146 struct cn_queue_dev *cn_queue_alloc_dev(char *name, struct sock *);
147 void cn_queue_free_dev(struct cn_queue_dev *dev);
149 int cn_cb_equal(struct cb_id *, struct cb_id *);
151 void cn_queue_wrapper(struct work_struct *work);
153 #endif /* __KERNEL__ */
154 #endif /* __CONNECTOR_H */