Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 1 | /* |
| 2 | * cn_test.c |
| 3 | * |
Evgeniy Polyakov | acb9c1b | 2009-07-21 12:43:51 -0700 | [diff] [blame] | 4 | * 2004+ Copyright (c) Evgeniy Polyakov <zbr@ioremap.net> |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 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 | |
Mike Frysinger | 37cf2b8 | 2009-07-17 10:14:26 -0700 | [diff] [blame] | 22 | #define pr_fmt(fmt) "cn_test: " fmt |
| 23 | |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 24 | #include <linux/kernel.h> |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/moduleparam.h> |
| 27 | #include <linux/skbuff.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 28 | #include <linux/slab.h> |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 29 | #include <linux/timer.h> |
| 30 | |
Carlo Comin | 18a0c23 | 2005-11-08 09:38:56 -0800 | [diff] [blame] | 31 | #include <linux/connector.h> |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 32 | |
Mike Frysinger | 37cf2b8 | 2009-07-17 10:14:26 -0700 | [diff] [blame] | 33 | static struct cb_id cn_test_id = { CN_NETLINK_USERS + 3, 0x456 }; |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 34 | static char cn_test_name[] = "cn_test"; |
| 35 | static struct sock *nls; |
| 36 | static struct timer_list cn_test_timer; |
| 37 | |
Philipp Reisner | 7069331 | 2009-10-02 02:40:05 +0000 | [diff] [blame] | 38 | static void cn_test_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp) |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 39 | { |
Mike Frysinger | 37cf2b8 | 2009-07-17 10:14:26 -0700 | [diff] [blame] | 40 | pr_info("%s: %lu: idx=%x, val=%x, seq=%u, ack=%u, len=%d: %s.\n", |
| 41 | __func__, jiffies, msg->id.idx, msg->id.val, |
| 42 | msg->seq, msg->ack, msg->len, |
| 43 | msg->len ? (char *)msg->data : ""); |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 44 | } |
| 45 | |
Jaswinder Singh Rajput | 28f06c6 | 2009-06-17 16:26:30 -0700 | [diff] [blame] | 46 | /* |
| 47 | * Do not remove this function even if no one is using it as |
| 48 | * this is an example of how to get notifications about new |
| 49 | * connector user registration |
| 50 | */ |
| 51 | #if 0 |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 52 | static int cn_test_want_notify(void) |
| 53 | { |
| 54 | struct cn_ctl_msg *ctl; |
| 55 | struct cn_notify_req *req; |
| 56 | struct cn_msg *msg = NULL; |
| 57 | int size, size0; |
| 58 | struct sk_buff *skb; |
| 59 | struct nlmsghdr *nlh; |
| 60 | u32 group = 1; |
| 61 | |
| 62 | size0 = sizeof(*msg) + sizeof(*ctl) + 3 * sizeof(*req); |
| 63 | |
| 64 | size = NLMSG_SPACE(size0); |
| 65 | |
| 66 | skb = alloc_skb(size, GFP_ATOMIC); |
| 67 | if (!skb) { |
Mike Frysinger | 37cf2b8 | 2009-07-17 10:14:26 -0700 | [diff] [blame] | 68 | pr_err("failed to allocate new skb with size=%u\n", size); |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 69 | return -ENOMEM; |
| 70 | } |
| 71 | |
David S. Miller | 8786395 | 2012-06-26 21:19:02 -0700 | [diff] [blame] | 72 | nlh = nlmsg_put(skb, 0, 0x123, NLMSG_DONE, size - sizeof(*nlh), 0); |
| 73 | if (!nlh) { |
| 74 | kfree_skb(skb); |
| 75 | return -EMSGSIZE; |
| 76 | } |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 77 | |
David S. Miller | 8786395 | 2012-06-26 21:19:02 -0700 | [diff] [blame] | 78 | msg = nlmsg_data(nlh); |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 79 | |
| 80 | memset(msg, 0, size0); |
| 81 | |
| 82 | msg->id.idx = -1; |
| 83 | msg->id.val = -1; |
| 84 | msg->seq = 0x123; |
| 85 | msg->ack = 0x345; |
| 86 | msg->len = size0 - sizeof(*msg); |
| 87 | |
| 88 | ctl = (struct cn_ctl_msg *)(msg + 1); |
| 89 | |
| 90 | ctl->idx_notify_num = 1; |
| 91 | ctl->val_notify_num = 2; |
| 92 | ctl->group = group; |
| 93 | ctl->len = msg->len - sizeof(*ctl); |
| 94 | |
| 95 | req = (struct cn_notify_req *)(ctl + 1); |
| 96 | |
| 97 | /* |
| 98 | * Idx. |
| 99 | */ |
| 100 | req->first = cn_test_id.idx; |
| 101 | req->range = 10; |
| 102 | |
| 103 | /* |
| 104 | * Val 0. |
| 105 | */ |
| 106 | req++; |
| 107 | req->first = cn_test_id.val; |
| 108 | req->range = 10; |
| 109 | |
| 110 | /* |
| 111 | * Val 1. |
| 112 | */ |
| 113 | req++; |
| 114 | req->first = cn_test_id.val + 20; |
| 115 | req->range = 10; |
| 116 | |
Carlo Comin | 18a0c23 | 2005-11-08 09:38:56 -0800 | [diff] [blame] | 117 | NETLINK_CB(skb).dst_group = ctl->group; |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 118 | //netlink_broadcast(nls, skb, 0, ctl->group, GFP_ATOMIC); |
| 119 | netlink_unicast(nls, skb, 0, 0); |
| 120 | |
Mike Frysinger | 37cf2b8 | 2009-07-17 10:14:26 -0700 | [diff] [blame] | 121 | pr_info("request was sent: group=0x%x\n", ctl->group); |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 122 | |
| 123 | return 0; |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 124 | } |
Jaswinder Singh Rajput | 28f06c6 | 2009-06-17 16:26:30 -0700 | [diff] [blame] | 125 | #endif |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 126 | |
| 127 | static u32 cn_test_timer_counter; |
| 128 | static void cn_test_timer_func(unsigned long __data) |
| 129 | { |
| 130 | struct cn_msg *m; |
| 131 | char data[32]; |
| 132 | |
Mike Frysinger | 37cf2b8 | 2009-07-17 10:14:26 -0700 | [diff] [blame] | 133 | pr_debug("%s: timer fired with data %lu\n", __func__, __data); |
| 134 | |
Yoann Padioleau | dd00cc4 | 2007-07-19 01:49:03 -0700 | [diff] [blame] | 135 | m = kzalloc(sizeof(*m) + sizeof(data), GFP_ATOMIC); |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 136 | if (m) { |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 137 | |
| 138 | memcpy(&m->id, &cn_test_id, sizeof(m->id)); |
| 139 | m->seq = cn_test_timer_counter; |
| 140 | m->len = sizeof(data); |
| 141 | |
| 142 | m->len = |
| 143 | scnprintf(data, sizeof(data), "counter = %u", |
| 144 | cn_test_timer_counter) + 1; |
| 145 | |
| 146 | memcpy(m + 1, data, m->len); |
| 147 | |
Andrew Morton | f82da72 | 2009-02-12 16:47:01 -0800 | [diff] [blame] | 148 | cn_netlink_send(m, 0, GFP_ATOMIC); |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 149 | kfree(m); |
| 150 | } |
| 151 | |
| 152 | cn_test_timer_counter++; |
| 153 | |
Mike Frysinger | 37cf2b8 | 2009-07-17 10:14:26 -0700 | [diff] [blame] | 154 | mod_timer(&cn_test_timer, jiffies + msecs_to_jiffies(1000)); |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 155 | } |
| 156 | |
| 157 | static int cn_test_init(void) |
| 158 | { |
| 159 | int err; |
| 160 | |
| 161 | err = cn_add_callback(&cn_test_id, cn_test_name, cn_test_callback); |
| 162 | if (err) |
| 163 | goto err_out; |
| 164 | cn_test_id.val++; |
| 165 | err = cn_add_callback(&cn_test_id, cn_test_name, cn_test_callback); |
| 166 | if (err) { |
| 167 | cn_del_callback(&cn_test_id); |
| 168 | goto err_out; |
| 169 | } |
| 170 | |
Andrew Morton | f82da72 | 2009-02-12 16:47:01 -0800 | [diff] [blame] | 171 | setup_timer(&cn_test_timer, cn_test_timer_func, 0); |
Mike Frysinger | 37cf2b8 | 2009-07-17 10:14:26 -0700 | [diff] [blame] | 172 | mod_timer(&cn_test_timer, jiffies + msecs_to_jiffies(1000)); |
| 173 | |
| 174 | pr_info("initialized with id={%u.%u}\n", |
| 175 | cn_test_id.idx, cn_test_id.val); |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 176 | |
| 177 | return 0; |
| 178 | |
| 179 | err_out: |
| 180 | if (nls && nls->sk_socket) |
| 181 | sock_release(nls->sk_socket); |
| 182 | |
| 183 | return err; |
| 184 | } |
| 185 | |
| 186 | static void cn_test_fini(void) |
| 187 | { |
| 188 | del_timer_sync(&cn_test_timer); |
| 189 | cn_del_callback(&cn_test_id); |
| 190 | cn_test_id.val--; |
| 191 | cn_del_callback(&cn_test_id); |
| 192 | if (nls && nls->sk_socket) |
| 193 | sock_release(nls->sk_socket); |
| 194 | } |
| 195 | |
| 196 | module_init(cn_test_init); |
| 197 | module_exit(cn_test_fini); |
| 198 | |
| 199 | MODULE_LICENSE("GPL"); |
Evgeniy Polyakov | acb9c1b | 2009-07-21 12:43:51 -0700 | [diff] [blame] | 200 | MODULE_AUTHOR("Evgeniy Polyakov <zbr@ioremap.net>"); |
Evgeniy Polyakov | 7672d0b | 2005-09-11 19:15:07 -0700 | [diff] [blame] | 201 | MODULE_DESCRIPTION("Connector's test module"); |