1 /* 2 * connector.h 3 * 4 * 2004-2005 Copyright (c) Evgeniy Polyakov <[email protected]> 5 * All rights reserved. 6 * 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. 11 * 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. 16 * 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 20 */ 21 22 #ifndef __CONNECTOR_H 23 #define __CONNECTOR_H 24 25 #include <asm/types.h> 26 27 #define CN_IDX_CONNECTOR 0xffffffff 28 #define CN_VAL_CONNECTOR 0xffffffff 29 30 /* 31 * Process Events connector unique ids -- used for message routing 32 */ 33 #define CN_IDX_PROC 0x1 34 #define CN_VAL_PROC 0x1 35 #define CN_IDX_CIFS 0x2 36 #define CN_VAL_CIFS 0x1 37 #define CN_W1_IDX 0x3 /* w1 communication */ 38 #define CN_W1_VAL 0x1 39 #define CN_IDX_V86D 0x4 40 #define CN_VAL_V86D_UVESAFB 0x1 41 42 #define CN_NETLINK_USERS 5 43 44 /* 45 * Maximum connector's message size. 46 */ 47 #define CONNECTOR_MAX_MSG_SIZE 16384 48 49 /* 50 * idx and val are unique identifiers which 51 * are used for message routing and 52 * must be registered in connector.h for in-kernel usage. 53 */ 54 55 struct cb_id { 56 __u32 idx; 57 __u32 val; 58 }; 59 60 struct cn_msg { 61 struct cb_id id; 62 63 __u32 seq; 64 __u32 ack; 65 66 __u16 len; /* Length of the following data */ 67 __u16 flags; 68 __u8 data[0]; 69 }; 70 71 /* 72 * Notify structure - requests notification about 73 * registering/unregistering idx/val in range [first, first+range]. 74 */ 75 struct cn_notify_req { 76 __u32 first; 77 __u32 range; 78 }; 79 80 /* 81 * Main notification control message 82 * *_notify_num - number of appropriate cn_notify_req structures after 83 * this struct. 84 * group - notification receiver's idx. 85 * len - total length of the attached data. 86 */ 87 struct cn_ctl_msg { 88 __u32 idx_notify_num; 89 __u32 val_notify_num; 90 __u32 group; 91 __u32 len; 92 __u8 data[0]; 93 }; 94 95 #ifdef __KERNEL__ 96 97 #include <asm/atomic.h> 98 99 #include <linux/list.h> 100 #include <linux/workqueue.h> 101 102 #include <net/sock.h> 103 104 #define CN_CBQ_NAMELEN 32 105 106 struct cn_queue_dev { 107 atomic_t refcnt; 108 unsigned char name[CN_CBQ_NAMELEN]; 109 110 struct workqueue_struct *cn_queue; 111 112 struct list_head queue_list; 113 spinlock_t queue_lock; 114 115 int netlink_groups; 116 struct sock *nls; 117 }; 118 119 struct cn_callback_id { 120 unsigned char name[CN_CBQ_NAMELEN]; 121 struct cb_id id; 122 }; 123 124 struct cn_callback_data { 125 void (*destruct_data) (void *); 126 void *ddata; 127 128 void *callback_priv; 129 void (*callback) (void *); 130 131 void *free; 132 }; 133 134 struct cn_callback_entry { 135 struct list_head callback_entry; 136 struct cn_callback *cb; 137 struct work_struct work; 138 struct cn_queue_dev *pdev; 139 140 struct cn_callback_id id; 141 struct cn_callback_data data; 142 143 int seq, group; 144 struct sock *nls; 145 }; 146 147 struct cn_ctl_entry { 148 struct list_head notify_entry; 149 struct cn_ctl_msg *msg; 150 }; 151 152 struct cn_dev { 153 struct cb_id id; 154 155 u32 seq, groups; 156 struct sock *nls; 157 void (*input) (struct sk_buff *skb); 158 159 struct cn_queue_dev *cbdev; 160 }; 161 162 int cn_add_callback(struct cb_id *, char *, void (*callback) (void *)); 163 void cn_del_callback(struct cb_id *); 164 int cn_netlink_send(struct cn_msg *, u32, gfp_t); 165 166 int cn_queue_add_callback(struct cn_queue_dev *dev, char *name, struct cb_id *id, void (*callback)(void *)); 167 void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id); 168 169 struct cn_queue_dev *cn_queue_alloc_dev(char *name, struct sock *); 170 void cn_queue_free_dev(struct cn_queue_dev *dev); 171 172 int cn_cb_equal(struct cb_id *, struct cb_id *); 173 174 void cn_queue_wrapper(struct work_struct *work); 175 176 extern int cn_already_initialized; 177 178 #endif /* __KERNEL__ */ 179 #endif /* __CONNECTOR_H */ 180