Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 1 | /* |
| 2 | * connector.h |
| 3 | * |
| 4 | * 2004-2005 Copyright (c) Evgeniy Polyakov <johnpol@2ka.mipt.ru> |
| 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 | #define CN_NETLINK_USERS 1 |
| 31 | |
| 32 | /* |
| 33 | * Maximum connector's message size. |
| 34 | */ |
| 35 | #define CONNECTOR_MAX_MSG_SIZE 1024 |
| 36 | |
| 37 | /* |
| 38 | * idx and val are unique identifiers which |
| 39 | * are used for message routing and |
| 40 | * must be registered in connector.h for in-kernel usage. |
| 41 | */ |
| 42 | |
| 43 | struct cb_id { |
| 44 | __u32 idx; |
| 45 | __u32 val; |
| 46 | }; |
| 47 | |
| 48 | struct cn_msg { |
| 49 | struct cb_id id; |
| 50 | |
| 51 | __u32 seq; |
| 52 | __u32 ack; |
| 53 | |
| 54 | __u16 len; /* Length of the following data */ |
| 55 | __u16 flags; |
| 56 | __u8 data[0]; |
| 57 | }; |
| 58 | |
| 59 | /* |
| 60 | * Notify structure - requests notification about |
| 61 | * registering/unregistering idx/val in range [first, first+range]. |
| 62 | */ |
| 63 | struct cn_notify_req { |
| 64 | __u32 first; |
| 65 | __u32 range; |
| 66 | }; |
| 67 | |
| 68 | /* |
| 69 | * Main notification control message |
| 70 | * *_notify_num - number of appropriate cn_notify_req structures after |
| 71 | * this struct. |
| 72 | * group - notification receiver's idx. |
| 73 | * len - total length of the attached data. |
| 74 | */ |
| 75 | struct cn_ctl_msg { |
| 76 | __u32 idx_notify_num; |
| 77 | __u32 val_notify_num; |
| 78 | __u32 group; |
| 79 | __u32 len; |
| 80 | __u8 data[0]; |
| 81 | }; |
| 82 | |
| 83 | #ifdef __KERNEL__ |
| 84 | |
| 85 | #include <asm/atomic.h> |
| 86 | |
| 87 | #include <linux/list.h> |
| 88 | #include <linux/workqueue.h> |
| 89 | |
| 90 | #include <net/sock.h> |
| 91 | |
| 92 | #define CN_CBQ_NAMELEN 32 |
| 93 | |
| 94 | struct cn_queue_dev { |
| 95 | atomic_t refcnt; |
| 96 | unsigned char name[CN_CBQ_NAMELEN]; |
| 97 | |
| 98 | struct workqueue_struct *cn_queue; |
| 99 | |
| 100 | struct list_head queue_list; |
| 101 | spinlock_t queue_lock; |
| 102 | |
| 103 | int netlink_groups; |
| 104 | struct sock *nls; |
| 105 | }; |
| 106 | |
Evgeniy Polyakov | acd042b | 2005-09-26 15:06:50 -0700 | [diff] [blame] | 107 | struct cn_callback_id { |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 108 | unsigned char name[CN_CBQ_NAMELEN]; |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 109 | struct cb_id id; |
Evgeniy Polyakov | acd042b | 2005-09-26 15:06:50 -0700 | [diff] [blame] | 110 | }; |
| 111 | |
| 112 | struct cn_callback_data { |
| 113 | void (*destruct_data) (void *); |
| 114 | void *ddata; |
| 115 | |
| 116 | void *callback_priv; |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 117 | void (*callback) (void *); |
Evgeniy Polyakov | acd042b | 2005-09-26 15:06:50 -0700 | [diff] [blame] | 118 | |
| 119 | void *free; |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 120 | }; |
| 121 | |
| 122 | struct cn_callback_entry { |
| 123 | struct list_head callback_entry; |
| 124 | struct cn_callback *cb; |
| 125 | struct work_struct work; |
| 126 | struct cn_queue_dev *pdev; |
| 127 | |
Evgeniy Polyakov | acd042b | 2005-09-26 15:06:50 -0700 | [diff] [blame] | 128 | struct cn_callback_id id; |
| 129 | struct cn_callback_data data; |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 130 | |
| 131 | int seq, group; |
| 132 | struct sock *nls; |
| 133 | }; |
| 134 | |
| 135 | struct cn_ctl_entry { |
| 136 | struct list_head notify_entry; |
| 137 | struct cn_ctl_msg *msg; |
| 138 | }; |
| 139 | |
| 140 | struct cn_dev { |
| 141 | struct cb_id id; |
| 142 | |
| 143 | u32 seq, groups; |
| 144 | struct sock *nls; |
| 145 | void (*input) (struct sock * sk, int len); |
| 146 | |
| 147 | struct cn_queue_dev *cbdev; |
| 148 | }; |
| 149 | |
| 150 | int cn_add_callback(struct cb_id *, char *, void (*callback) (void *)); |
| 151 | void cn_del_callback(struct cb_id *); |
Al Viro | dd0fc66 | 2005-10-07 07:46:04 +0100 | [diff] [blame] | 152 | int cn_netlink_send(struct cn_msg *, u32, gfp_t); |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 153 | |
Evgeniy Polyakov | acd042b | 2005-09-26 15:06:50 -0700 | [diff] [blame] | 154 | int cn_queue_add_callback(struct cn_queue_dev *dev, char *name, struct cb_id *id, void (*callback)(void *)); |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 155 | void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id); |
| 156 | |
| 157 | struct cn_queue_dev *cn_queue_alloc_dev(char *name, struct sock *); |
| 158 | void cn_queue_free_dev(struct cn_queue_dev *dev); |
| 159 | |
| 160 | int cn_cb_equal(struct cb_id *, struct cb_id *); |
| 161 | |
Evgeniy Polyakov | acd042b | 2005-09-26 15:06:50 -0700 | [diff] [blame] | 162 | void cn_queue_wrapper(void *data); |
| 163 | |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 164 | extern int cn_already_initialized; |
| 165 | |
| 166 | #endif /* __KERNEL__ */ |
| 167 | #endif /* __CONNECTOR_H */ |