Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2005 Voltaire Inc. All rights reserved. |
| 3 | * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved. |
| 4 | * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved. |
| 5 | * Copyright (c) 2005 Intel Corporation. All rights reserved. |
| 6 | * |
Sean Hefty | a947491 | 2008-07-14 23:48:43 -0700 | [diff] [blame^] | 7 | * This software is available to you under a choice of one of two |
| 8 | * licenses. You may choose to be licensed under the terms of the GNU |
| 9 | * General Public License (GPL) Version 2, available from the file |
| 10 | * COPYING in the main directory of this source tree, or the |
| 11 | * OpenIB.org BSD license below: |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 12 | * |
Sean Hefty | a947491 | 2008-07-14 23:48:43 -0700 | [diff] [blame^] | 13 | * Redistribution and use in source and binary forms, with or |
| 14 | * without modification, are permitted provided that the following |
| 15 | * conditions are met: |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 16 | * |
Sean Hefty | a947491 | 2008-07-14 23:48:43 -0700 | [diff] [blame^] | 17 | * - Redistributions of source code must retain the above |
| 18 | * copyright notice, this list of conditions and the following |
| 19 | * disclaimer. |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 20 | * |
Sean Hefty | a947491 | 2008-07-14 23:48:43 -0700 | [diff] [blame^] | 21 | * - Redistributions in binary form must reproduce the above |
| 22 | * copyright notice, this list of conditions and the following |
| 23 | * disclaimer in the documentation and/or other materials |
| 24 | * provided with the distribution. |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 25 | * |
Sean Hefty | a947491 | 2008-07-14 23:48:43 -0700 | [diff] [blame^] | 26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 33 | * SOFTWARE. |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 34 | */ |
| 35 | |
| 36 | #include <linux/mutex.h> |
| 37 | #include <linux/inetdevice.h> |
| 38 | #include <linux/workqueue.h> |
| 39 | #include <linux/if_arp.h> |
| 40 | #include <net/arp.h> |
| 41 | #include <net/neighbour.h> |
| 42 | #include <net/route.h> |
Tom Tucker | e795d09 | 2006-07-30 20:44:19 -0700 | [diff] [blame] | 43 | #include <net/netevent.h> |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 44 | #include <rdma/ib_addr.h> |
| 45 | |
| 46 | MODULE_AUTHOR("Sean Hefty"); |
| 47 | MODULE_DESCRIPTION("IB Address Translation"); |
| 48 | MODULE_LICENSE("Dual BSD/GPL"); |
| 49 | |
| 50 | struct addr_req { |
| 51 | struct list_head list; |
| 52 | struct sockaddr src_addr; |
| 53 | struct sockaddr dst_addr; |
| 54 | struct rdma_dev_addr *addr; |
Sean Hefty | 7a118df | 2006-10-31 11:12:59 -0800 | [diff] [blame] | 55 | struct rdma_addr_client *client; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 56 | void *context; |
| 57 | void (*callback)(int status, struct sockaddr *src_addr, |
| 58 | struct rdma_dev_addr *addr, void *context); |
| 59 | unsigned long timeout; |
| 60 | int status; |
| 61 | }; |
| 62 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 63 | static void process_req(struct work_struct *work); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 64 | |
| 65 | static DEFINE_MUTEX(lock); |
| 66 | static LIST_HEAD(req_list); |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 67 | static DECLARE_DELAYED_WORK(work, process_req); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 68 | static struct workqueue_struct *addr_wq; |
| 69 | |
Sean Hefty | 7a118df | 2006-10-31 11:12:59 -0800 | [diff] [blame] | 70 | void rdma_addr_register_client(struct rdma_addr_client *client) |
| 71 | { |
| 72 | atomic_set(&client->refcount, 1); |
| 73 | init_completion(&client->comp); |
| 74 | } |
| 75 | EXPORT_SYMBOL(rdma_addr_register_client); |
| 76 | |
| 77 | static inline void put_client(struct rdma_addr_client *client) |
| 78 | { |
| 79 | if (atomic_dec_and_test(&client->refcount)) |
| 80 | complete(&client->comp); |
| 81 | } |
| 82 | |
| 83 | void rdma_addr_unregister_client(struct rdma_addr_client *client) |
| 84 | { |
| 85 | put_client(client); |
| 86 | wait_for_completion(&client->comp); |
| 87 | } |
| 88 | EXPORT_SYMBOL(rdma_addr_unregister_client); |
| 89 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 90 | int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, |
| 91 | const unsigned char *dst_dev_addr) |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 92 | { |
| 93 | switch (dev->type) { |
| 94 | case ARPHRD_INFINIBAND: |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 95 | dev_addr->dev_type = RDMA_NODE_IB_CA; |
| 96 | break; |
| 97 | case ARPHRD_ETHER: |
| 98 | dev_addr->dev_type = RDMA_NODE_RNIC; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 99 | break; |
| 100 | default: |
| 101 | return -EADDRNOTAVAIL; |
| 102 | } |
| 103 | |
| 104 | memcpy(dev_addr->src_dev_addr, dev->dev_addr, MAX_ADDR_LEN); |
| 105 | memcpy(dev_addr->broadcast, dev->broadcast, MAX_ADDR_LEN); |
| 106 | if (dst_dev_addr) |
| 107 | memcpy(dev_addr->dst_dev_addr, dst_dev_addr, MAX_ADDR_LEN); |
| 108 | return 0; |
| 109 | } |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 110 | EXPORT_SYMBOL(rdma_copy_addr); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 111 | |
| 112 | int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr) |
| 113 | { |
| 114 | struct net_device *dev; |
Al Viro | 60cad5d | 2006-09-26 22:17:09 -0700 | [diff] [blame] | 115 | __be32 ip = ((struct sockaddr_in *) addr)->sin_addr.s_addr; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 116 | int ret; |
| 117 | |
Denis V. Lunev | 1ab3527 | 2008-01-22 22:04:30 -0800 | [diff] [blame] | 118 | dev = ip_dev_find(&init_net, ip); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 119 | if (!dev) |
| 120 | return -EADDRNOTAVAIL; |
| 121 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 122 | ret = rdma_copy_addr(dev_addr, dev, NULL); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 123 | dev_put(dev); |
| 124 | return ret; |
| 125 | } |
| 126 | EXPORT_SYMBOL(rdma_translate_ip); |
| 127 | |
| 128 | static void set_timeout(unsigned long time) |
| 129 | { |
| 130 | unsigned long delay; |
| 131 | |
| 132 | cancel_delayed_work(&work); |
| 133 | |
| 134 | delay = time - jiffies; |
| 135 | if ((long)delay <= 0) |
| 136 | delay = 1; |
| 137 | |
| 138 | queue_delayed_work(addr_wq, &work, delay); |
| 139 | } |
| 140 | |
| 141 | static void queue_req(struct addr_req *req) |
| 142 | { |
| 143 | struct addr_req *temp_req; |
| 144 | |
| 145 | mutex_lock(&lock); |
| 146 | list_for_each_entry_reverse(temp_req, &req_list, list) { |
Krishna Kumar | f115db4 | 2006-10-17 10:09:09 +0530 | [diff] [blame] | 147 | if (time_after_eq(req->timeout, temp_req->timeout)) |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 148 | break; |
| 149 | } |
| 150 | |
| 151 | list_add(&req->list, &temp_req->list); |
| 152 | |
| 153 | if (req_list.next == &req->list) |
| 154 | set_timeout(req->timeout); |
| 155 | mutex_unlock(&lock); |
| 156 | } |
| 157 | |
| 158 | static void addr_send_arp(struct sockaddr_in *dst_in) |
| 159 | { |
| 160 | struct rtable *rt; |
| 161 | struct flowi fl; |
Al Viro | 1b90c13 | 2008-03-29 03:10:28 +0000 | [diff] [blame] | 162 | __be32 dst_ip = dst_in->sin_addr.s_addr; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 163 | |
| 164 | memset(&fl, 0, sizeof fl); |
| 165 | fl.nl_u.ip4_u.daddr = dst_ip; |
Denis V. Lunev | f206351 | 2008-01-22 22:07:34 -0800 | [diff] [blame] | 166 | if (ip_route_output_key(&init_net, &rt, &fl)) |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 167 | return; |
| 168 | |
Steve Wise | 935ef2d | 2007-09-12 05:00:25 -0500 | [diff] [blame] | 169 | neigh_event_send(rt->u.dst.neighbour, NULL); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 170 | ip_rt_put(rt); |
| 171 | } |
| 172 | |
| 173 | static int addr_resolve_remote(struct sockaddr_in *src_in, |
| 174 | struct sockaddr_in *dst_in, |
| 175 | struct rdma_dev_addr *addr) |
| 176 | { |
Al Viro | 1b90c13 | 2008-03-29 03:10:28 +0000 | [diff] [blame] | 177 | __be32 src_ip = src_in->sin_addr.s_addr; |
| 178 | __be32 dst_ip = dst_in->sin_addr.s_addr; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 179 | struct flowi fl; |
| 180 | struct rtable *rt; |
| 181 | struct neighbour *neigh; |
| 182 | int ret; |
| 183 | |
| 184 | memset(&fl, 0, sizeof fl); |
| 185 | fl.nl_u.ip4_u.daddr = dst_ip; |
| 186 | fl.nl_u.ip4_u.saddr = src_ip; |
Denis V. Lunev | f206351 | 2008-01-22 22:07:34 -0800 | [diff] [blame] | 187 | ret = ip_route_output_key(&init_net, &rt, &fl); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 188 | if (ret) |
| 189 | goto out; |
| 190 | |
| 191 | /* If the device does ARP internally, return 'done' */ |
| 192 | if (rt->idev->dev->flags & IFF_NOARP) { |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 193 | rdma_copy_addr(addr, rt->idev->dev, NULL); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 194 | goto put; |
| 195 | } |
| 196 | |
| 197 | neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, rt->idev->dev); |
| 198 | if (!neigh) { |
| 199 | ret = -ENODATA; |
| 200 | goto put; |
| 201 | } |
| 202 | |
| 203 | if (!(neigh->nud_state & NUD_VALID)) { |
| 204 | ret = -ENODATA; |
| 205 | goto release; |
| 206 | } |
| 207 | |
| 208 | if (!src_ip) { |
| 209 | src_in->sin_family = dst_in->sin_family; |
| 210 | src_in->sin_addr.s_addr = rt->rt_src; |
| 211 | } |
| 212 | |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 213 | ret = rdma_copy_addr(addr, neigh->dev, neigh->ha); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 214 | release: |
| 215 | neigh_release(neigh); |
| 216 | put: |
| 217 | ip_rt_put(rt); |
| 218 | out: |
| 219 | return ret; |
| 220 | } |
| 221 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 222 | static void process_req(struct work_struct *work) |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 223 | { |
| 224 | struct addr_req *req, *temp_req; |
| 225 | struct sockaddr_in *src_in, *dst_in; |
| 226 | struct list_head done_list; |
| 227 | |
| 228 | INIT_LIST_HEAD(&done_list); |
| 229 | |
| 230 | mutex_lock(&lock); |
| 231 | list_for_each_entry_safe(req, temp_req, &req_list, list) { |
Krishna Kumar | c78bb84 | 2006-11-24 16:02:34 +0530 | [diff] [blame] | 232 | if (req->status == -ENODATA) { |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 233 | src_in = (struct sockaddr_in *) &req->src_addr; |
| 234 | dst_in = (struct sockaddr_in *) &req->dst_addr; |
| 235 | req->status = addr_resolve_remote(src_in, dst_in, |
| 236 | req->addr); |
Krishna Kumar | c78bb84 | 2006-11-24 16:02:34 +0530 | [diff] [blame] | 237 | if (req->status && time_after_eq(jiffies, req->timeout)) |
| 238 | req->status = -ETIMEDOUT; |
| 239 | else if (req->status == -ENODATA) |
| 240 | continue; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 241 | } |
Roland Dreier | 04699a1 | 2006-11-29 15:33:09 -0800 | [diff] [blame] | 242 | list_move_tail(&req->list, &done_list); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | if (!list_empty(&req_list)) { |
| 246 | req = list_entry(req_list.next, struct addr_req, list); |
| 247 | set_timeout(req->timeout); |
| 248 | } |
| 249 | mutex_unlock(&lock); |
| 250 | |
| 251 | list_for_each_entry_safe(req, temp_req, &done_list, list) { |
| 252 | list_del(&req->list); |
| 253 | req->callback(req->status, &req->src_addr, req->addr, |
| 254 | req->context); |
Sean Hefty | 7a118df | 2006-10-31 11:12:59 -0800 | [diff] [blame] | 255 | put_client(req->client); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 256 | kfree(req); |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | static int addr_resolve_local(struct sockaddr_in *src_in, |
| 261 | struct sockaddr_in *dst_in, |
| 262 | struct rdma_dev_addr *addr) |
| 263 | { |
| 264 | struct net_device *dev; |
Al Viro | 1b90c13 | 2008-03-29 03:10:28 +0000 | [diff] [blame] | 265 | __be32 src_ip = src_in->sin_addr.s_addr; |
Al Viro | 60cad5d | 2006-09-26 22:17:09 -0700 | [diff] [blame] | 266 | __be32 dst_ip = dst_in->sin_addr.s_addr; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 267 | int ret; |
| 268 | |
Denis V. Lunev | 1ab3527 | 2008-01-22 22:04:30 -0800 | [diff] [blame] | 269 | dev = ip_dev_find(&init_net, dst_ip); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 270 | if (!dev) |
| 271 | return -EADDRNOTAVAIL; |
| 272 | |
Joe Perches | 6360a02 | 2007-12-16 13:47:33 -0800 | [diff] [blame] | 273 | if (ipv4_is_zeronet(src_ip)) { |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 274 | src_in->sin_family = dst_in->sin_family; |
| 275 | src_in->sin_addr.s_addr = dst_ip; |
Tom Tucker | 07ebafb | 2006-08-03 16:02:42 -0500 | [diff] [blame] | 276 | ret = rdma_copy_addr(addr, dev, dev->dev_addr); |
Joe Perches | 6360a02 | 2007-12-16 13:47:33 -0800 | [diff] [blame] | 277 | } else if (ipv4_is_loopback(src_ip)) { |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 278 | ret = rdma_translate_ip((struct sockaddr *)dst_in, addr); |
| 279 | if (!ret) |
| 280 | memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN); |
| 281 | } else { |
| 282 | ret = rdma_translate_ip((struct sockaddr *)src_in, addr); |
| 283 | if (!ret) |
| 284 | memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN); |
| 285 | } |
| 286 | |
| 287 | dev_put(dev); |
| 288 | return ret; |
| 289 | } |
| 290 | |
Sean Hefty | 7a118df | 2006-10-31 11:12:59 -0800 | [diff] [blame] | 291 | int rdma_resolve_ip(struct rdma_addr_client *client, |
| 292 | struct sockaddr *src_addr, struct sockaddr *dst_addr, |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 293 | struct rdma_dev_addr *addr, int timeout_ms, |
| 294 | void (*callback)(int status, struct sockaddr *src_addr, |
| 295 | struct rdma_dev_addr *addr, void *context), |
| 296 | void *context) |
| 297 | { |
| 298 | struct sockaddr_in *src_in, *dst_in; |
| 299 | struct addr_req *req; |
| 300 | int ret = 0; |
| 301 | |
Yoann Padioleau | dd00cc4 | 2007-07-19 01:49:03 -0700 | [diff] [blame] | 302 | req = kzalloc(sizeof *req, GFP_KERNEL); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 303 | if (!req) |
| 304 | return -ENOMEM; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 305 | |
| 306 | if (src_addr) |
| 307 | memcpy(&req->src_addr, src_addr, ip_addr_size(src_addr)); |
| 308 | memcpy(&req->dst_addr, dst_addr, ip_addr_size(dst_addr)); |
| 309 | req->addr = addr; |
| 310 | req->callback = callback; |
| 311 | req->context = context; |
Sean Hefty | 7a118df | 2006-10-31 11:12:59 -0800 | [diff] [blame] | 312 | req->client = client; |
| 313 | atomic_inc(&client->refcount); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 314 | |
| 315 | src_in = (struct sockaddr_in *) &req->src_addr; |
| 316 | dst_in = (struct sockaddr_in *) &req->dst_addr; |
| 317 | |
| 318 | req->status = addr_resolve_local(src_in, dst_in, addr); |
| 319 | if (req->status == -EADDRNOTAVAIL) |
| 320 | req->status = addr_resolve_remote(src_in, dst_in, addr); |
| 321 | |
| 322 | switch (req->status) { |
| 323 | case 0: |
| 324 | req->timeout = jiffies; |
| 325 | queue_req(req); |
| 326 | break; |
| 327 | case -ENODATA: |
| 328 | req->timeout = msecs_to_jiffies(timeout_ms) + jiffies; |
| 329 | queue_req(req); |
| 330 | addr_send_arp(dst_in); |
| 331 | break; |
| 332 | default: |
| 333 | ret = req->status; |
Sean Hefty | 7a118df | 2006-10-31 11:12:59 -0800 | [diff] [blame] | 334 | atomic_dec(&client->refcount); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 335 | kfree(req); |
| 336 | break; |
| 337 | } |
| 338 | return ret; |
| 339 | } |
| 340 | EXPORT_SYMBOL(rdma_resolve_ip); |
| 341 | |
| 342 | void rdma_addr_cancel(struct rdma_dev_addr *addr) |
| 343 | { |
| 344 | struct addr_req *req, *temp_req; |
| 345 | |
| 346 | mutex_lock(&lock); |
| 347 | list_for_each_entry_safe(req, temp_req, &req_list, list) { |
| 348 | if (req->addr == addr) { |
| 349 | req->status = -ECANCELED; |
| 350 | req->timeout = jiffies; |
Roland Dreier | 04699a1 | 2006-11-29 15:33:09 -0800 | [diff] [blame] | 351 | list_move(&req->list, &req_list); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 352 | set_timeout(req->timeout); |
| 353 | break; |
| 354 | } |
| 355 | } |
| 356 | mutex_unlock(&lock); |
| 357 | } |
| 358 | EXPORT_SYMBOL(rdma_addr_cancel); |
| 359 | |
Roland Dreier | 3cd9656 | 2006-09-22 15:22:46 -0700 | [diff] [blame] | 360 | static int netevent_callback(struct notifier_block *self, unsigned long event, |
Tom Tucker | e795d09 | 2006-07-30 20:44:19 -0700 | [diff] [blame] | 361 | void *ctx) |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 362 | { |
Roland Dreier | 3cd9656 | 2006-09-22 15:22:46 -0700 | [diff] [blame] | 363 | if (event == NETEVENT_NEIGH_UPDATE) { |
Tom Tucker | e795d09 | 2006-07-30 20:44:19 -0700 | [diff] [blame] | 364 | struct neighbour *neigh = ctx; |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 365 | |
Steve Wise | 1f12667 | 2007-01-23 19:03:17 -0600 | [diff] [blame] | 366 | if (neigh->nud_state & NUD_VALID) { |
Tom Tucker | e795d09 | 2006-07-30 20:44:19 -0700 | [diff] [blame] | 367 | set_timeout(jiffies); |
| 368 | } |
| 369 | } |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 370 | return 0; |
| 371 | } |
| 372 | |
Tom Tucker | e795d09 | 2006-07-30 20:44:19 -0700 | [diff] [blame] | 373 | static struct notifier_block nb = { |
| 374 | .notifier_call = netevent_callback |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 375 | }; |
| 376 | |
| 377 | static int addr_init(void) |
| 378 | { |
Sean Hefty | c7f743a | 2007-02-01 12:23:37 -0800 | [diff] [blame] | 379 | addr_wq = create_singlethread_workqueue("ib_addr"); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 380 | if (!addr_wq) |
| 381 | return -ENOMEM; |
| 382 | |
Tom Tucker | e795d09 | 2006-07-30 20:44:19 -0700 | [diff] [blame] | 383 | register_netevent_notifier(&nb); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 384 | return 0; |
| 385 | } |
| 386 | |
| 387 | static void addr_cleanup(void) |
| 388 | { |
Tom Tucker | e795d09 | 2006-07-30 20:44:19 -0700 | [diff] [blame] | 389 | unregister_netevent_notifier(&nb); |
Sean Hefty | 7025fcd | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 390 | destroy_workqueue(addr_wq); |
| 391 | } |
| 392 | |
| 393 | module_init(addr_init); |
| 394 | module_exit(addr_cleanup); |