blob: ec3769295dac5c84ba26c44790760c4045dc4c67 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * INET 802.1Q VLAN
3 * Ethernet-type device handling.
4 *
5 * Authors: Ben Greear <greearb@candelatech.com>
Patrick McHardyad712082008-01-21 00:27:00 -08006 * Please send support related email to: netdev@vger.kernel.org
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +09008 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * Fixes:
10 * Fix for packet capture - Nick Eggleston <nick@dccinc.com>;
11 * Add HW acceleration hooks - David S. Miller <davem@redhat.com>;
12 * Correct all the locking - David S. Miller <davem@redhat.com>;
13 * Use hash table for VLAN groups - David S. Miller <davem@redhat.com>
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version.
19 */
20
Randy Dunlap4fc268d2006-01-11 12:17:47 -080021#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/module.h>
23#include <linux/netdevice.h>
24#include <linux/skbuff.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/init.h>
Franck Bui-Huu82524742008-05-12 21:21:05 +020026#include <linux/rculist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <net/p8022.h>
28#include <net/arp.h>
29#include <linux/rtnetlink.h>
30#include <linux/notifier.h>
Patrick McHardy61362762008-07-14 22:51:55 -070031#include <net/rtnetlink.h>
Eric W. Biedermane9dc8652007-09-12 13:02:17 +020032#include <net/net_namespace.h>
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -070033#include <net/netns/generic.h>
Patrick McHardy61362762008-07-14 22:51:55 -070034#include <asm/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
36#include <linux/if_vlan.h>
37#include "vlan.h"
38#include "vlanproc.h"
39
40#define DRV_VERSION "1.8"
41
42/* Global VLAN variables */
43
Eric Dumazetf99189b2009-11-17 10:42:49 +000044int vlan_net_id __read_mostly;
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -070045
Linus Torvalds1da177e2005-04-16 15:20:36 -070046/* Our listing of VLAN group(s) */
47static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE];
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
Stephen Hemmingerb30200612008-10-28 22:12:36 -070049const char vlan_fullname[] = "802.1Q VLAN Support";
50const char vlan_version[] = DRV_VERSION;
51static const char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>";
52static const char vlan_buggyright[] = "David S. Miller <davem@redhat.com>";
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
Stephen Hemminger7546dd92009-03-09 08:18:29 +000054static struct packet_type vlan_packet_type __read_mostly = {
Harvey Harrison09640e62009-02-01 00:45:17 -080055 .type = cpu_to_be16(ETH_P_8021Q),
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 .func = vlan_skb_recv, /* VLAN receive method */
57};
58
Linus Torvalds1da177e2005-04-16 15:20:36 -070059/* End of global variables definitions. */
60
Patrick McHardy2029cc22008-01-21 00:26:41 -080061static inline unsigned int vlan_grp_hashfn(unsigned int idx)
62{
63 return ((idx >> VLAN_GRP_HASH_SHIFT) ^ idx) & VLAN_GRP_HASH_MASK;
64}
65
Linus Torvalds1da177e2005-04-16 15:20:36 -070066/* Must be invoked with RCU read lock (no preempt) */
Pavel Emelyanova9fde262008-04-16 00:48:04 -070067static struct vlan_group *__vlan_find_group(struct net_device *real_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070068{
69 struct vlan_group *grp;
70 struct hlist_node *n;
Pavel Emelyanova9fde262008-04-16 00:48:04 -070071 int hash = vlan_grp_hashfn(real_dev->ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
73 hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) {
Pavel Emelyanova9fde262008-04-16 00:48:04 -070074 if (grp->real_dev == real_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 return grp;
76 }
77
78 return NULL;
79}
80
81/* Find the protocol handler. Assumes VID < VLAN_VID_MASK.
82 *
83 * Must be invoked with RCU read lock (no preempt)
84 */
Patrick McHardy9bb85822008-07-08 03:24:44 -070085struct net_device *__find_vlan_dev(struct net_device *real_dev, u16 vlan_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -070086{
Pavel Emelyanova9fde262008-04-16 00:48:04 -070087 struct vlan_group *grp = __vlan_find_group(real_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070088
89 if (grp)
Patrick McHardy9bb85822008-07-08 03:24:44 -070090 return vlan_group_get_device(grp, vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
92 return NULL;
93}
94
Dan Aloni5c15bde2007-03-02 20:44:51 -080095static void vlan_group_free(struct vlan_group *grp)
96{
97 int i;
98
Patrick McHardy2029cc22008-01-21 00:26:41 -080099 for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++)
Dan Aloni5c15bde2007-03-02 20:44:51 -0800100 kfree(grp->vlan_devices_arrays[i]);
101 kfree(grp);
102}
103
Pavel Emelyanova9fde262008-04-16 00:48:04 -0700104static struct vlan_group *vlan_group_alloc(struct net_device *real_dev)
Patrick McHardy42429aa2007-06-13 12:05:59 -0700105{
106 struct vlan_group *grp;
Patrick McHardy42429aa2007-06-13 12:05:59 -0700107
108 grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL);
109 if (!grp)
110 return NULL;
111
Pavel Emelyanova9fde262008-04-16 00:48:04 -0700112 grp->real_dev = real_dev;
Patrick McHardy42429aa2007-06-13 12:05:59 -0700113 hlist_add_head_rcu(&grp->hlist,
Pavel Emelyanova9fde262008-04-16 00:48:04 -0700114 &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]);
Patrick McHardy42429aa2007-06-13 12:05:59 -0700115 return grp;
Pavel Emelyanov67727182008-03-26 16:27:22 -0700116}
Patrick McHardy42429aa2007-06-13 12:05:59 -0700117
Patrick McHardy9bb85822008-07-08 03:24:44 -0700118static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id)
Pavel Emelyanov67727182008-03-26 16:27:22 -0700119{
120 struct net_device **array;
121 unsigned int size;
122
123 ASSERT_RTNL();
124
Patrick McHardy9bb85822008-07-08 03:24:44 -0700125 array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
Pavel Emelyanov67727182008-03-26 16:27:22 -0700126 if (array != NULL)
127 return 0;
128
129 size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN;
130 array = kzalloc(size, GFP_KERNEL);
131 if (array == NULL)
132 return -ENOBUFS;
133
Patrick McHardy9bb85822008-07-08 03:24:44 -0700134 vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array;
Pavel Emelyanov67727182008-03-26 16:27:22 -0700135 return 0;
Patrick McHardy42429aa2007-06-13 12:05:59 -0700136}
137
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138static void vlan_rcu_free(struct rcu_head *rcu)
139{
Dan Aloni5c15bde2007-03-02 20:44:51 -0800140 vlan_group_free(container_of(rcu, struct vlan_group, rcu));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141}
142
Eric Dumazet23289a32009-10-27 07:06:36 +0000143void unregister_vlan_dev(struct net_device *dev, struct list_head *head)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800145 struct vlan_dev_info *vlan = vlan_dev_info(dev);
Patrick McHardyaf301512008-01-21 00:25:50 -0800146 struct net_device *real_dev = vlan->real_dev;
Stephen Hemminger656299f2008-11-19 21:53:47 -0800147 const struct net_device_ops *ops = real_dev->netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 struct vlan_group *grp;
Patrick McHardy9bb85822008-07-08 03:24:44 -0700149 u16 vlan_id = vlan->vlan_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
151 ASSERT_RTNL();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
Pavel Emelyanova9fde262008-04-16 00:48:04 -0700153 grp = __vlan_find_group(real_dev);
Patrick McHardyaf301512008-01-21 00:25:50 -0800154 BUG_ON(!grp);
Patrick McHardyacc5efb2008-01-21 00:25:31 -0800155
Patrick McHardyacc5efb2008-01-21 00:25:31 -0800156 /* Take it out of our own structures, but be sure to interlock with
157 * HW accelerating devices or SW vlan input packet processing.
158 */
159 if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
Stephen Hemminger656299f2008-11-19 21:53:47 -0800160 ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id);
Patrick McHardyacc5efb2008-01-21 00:25:31 -0800161
Patrick McHardyaf301512008-01-21 00:25:50 -0800162 grp->nr_vlans--;
163
Patrick McHardy29906f62009-10-29 23:43:00 -0700164 vlan_group_set_device(grp, vlan_id, NULL);
165 if (!grp->killall)
Eric Dumazet63c80992009-10-27 07:06:49 +0000166 synchronize_net();
Patrick McHardy29906f62009-10-29 23:43:00 -0700167
Eric Dumazet23289a32009-10-27 07:06:36 +0000168 unregister_netdevice_queue(dev, head);
Patrick McHardyce305002008-07-05 21:26:41 -0700169
Patrick McHardyacc5efb2008-01-21 00:25:31 -0800170 /* If the group is now empty, kill off the group. */
Patrick McHardyaf301512008-01-21 00:25:50 -0800171 if (grp->nr_vlans == 0) {
Patrick McHardy70c03b42008-07-05 21:26:57 -0700172 vlan_gvrp_uninit_applicant(real_dev);
173
Patrick McHardyacc5efb2008-01-21 00:25:31 -0800174 if (real_dev->features & NETIF_F_HW_VLAN_RX)
Stephen Hemminger656299f2008-11-19 21:53:47 -0800175 ops->ndo_vlan_rx_register(real_dev, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176
Patrick McHardyacc5efb2008-01-21 00:25:31 -0800177 hlist_del_rcu(&grp->hlist);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178
Patrick McHardyacc5efb2008-01-21 00:25:31 -0800179 /* Free the group, after all cpu's are done. */
180 call_rcu(&grp->rcu, vlan_rcu_free);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 }
182
Patrick McHardyaf301512008-01-21 00:25:50 -0800183 /* Get rid of the vlan's reference to real_dev */
184 dev_put(real_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185}
186
Patrick McHardy2029cc22008-01-21 00:26:41 -0800187static void vlan_transfer_operstate(const struct net_device *dev,
188 struct net_device *vlandev)
Stefan Rompfddd7bf92006-03-20 17:11:41 -0800189{
190 /* Have to respect userspace enforced dormant state
191 * of real device, also must allow supplicant running
192 * on VLAN device
193 */
194 if (dev->operstate == IF_OPER_DORMANT)
195 netif_dormant_on(vlandev);
196 else
197 netif_dormant_off(vlandev);
198
199 if (netif_carrier_ok(dev)) {
200 if (!netif_carrier_ok(vlandev))
201 netif_carrier_on(vlandev);
202 } else {
203 if (netif_carrier_ok(vlandev))
204 netif_carrier_off(vlandev);
205 }
206}
207
Patrick McHardy9bb85822008-07-08 03:24:44 -0700208int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id)
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700209{
Stephen Hemminger656299f2008-11-19 21:53:47 -0800210 const char *name = real_dev->name;
211 const struct net_device_ops *ops = real_dev->netdev_ops;
Patrick McHardy40f98e12008-01-21 00:24:30 -0800212
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700213 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
Patrick McHardy40f98e12008-01-21 00:24:30 -0800214 pr_info("8021q: VLANs not supported on %s\n", name);
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700215 return -EOPNOTSUPP;
216 }
217
Stephen Hemminger656299f2008-11-19 21:53:47 -0800218 if ((real_dev->features & NETIF_F_HW_VLAN_RX) && !ops->ndo_vlan_rx_register) {
Patrick McHardy40f98e12008-01-21 00:24:30 -0800219 pr_info("8021q: device %s has buggy VLAN hw accel\n", name);
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700220 return -EOPNOTSUPP;
221 }
222
223 if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) &&
Stephen Hemminger656299f2008-11-19 21:53:47 -0800224 (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) {
Patrick McHardy40f98e12008-01-21 00:24:30 -0800225 pr_info("8021q: Device %s has buggy VLAN hw accel\n", name);
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700226 return -EOPNOTSUPP;
227 }
228
Patrick McHardy40f98e12008-01-21 00:24:30 -0800229 if (__find_vlan_dev(real_dev, vlan_id) != NULL)
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700230 return -EEXIST;
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700231
232 return 0;
233}
234
Patrick McHardy07b5b172007-06-13 12:07:54 -0700235int register_vlan_dev(struct net_device *dev)
Patrick McHardye89fe422007-06-13 12:06:29 -0700236{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800237 struct vlan_dev_info *vlan = vlan_dev_info(dev);
Patrick McHardye89fe422007-06-13 12:06:29 -0700238 struct net_device *real_dev = vlan->real_dev;
Stephen Hemminger656299f2008-11-19 21:53:47 -0800239 const struct net_device_ops *ops = real_dev->netdev_ops;
Patrick McHardy9bb85822008-07-08 03:24:44 -0700240 u16 vlan_id = vlan->vlan_id;
Patrick McHardye89fe422007-06-13 12:06:29 -0700241 struct vlan_group *grp, *ngrp = NULL;
242 int err;
243
Pavel Emelyanova9fde262008-04-16 00:48:04 -0700244 grp = __vlan_find_group(real_dev);
Patrick McHardye89fe422007-06-13 12:06:29 -0700245 if (!grp) {
Pavel Emelyanova9fde262008-04-16 00:48:04 -0700246 ngrp = grp = vlan_group_alloc(real_dev);
Patrick McHardye89fe422007-06-13 12:06:29 -0700247 if (!grp)
248 return -ENOBUFS;
Patrick McHardy70c03b42008-07-05 21:26:57 -0700249 err = vlan_gvrp_init_applicant(real_dev);
250 if (err < 0)
251 goto out_free_group;
Patrick McHardye89fe422007-06-13 12:06:29 -0700252 }
253
Pavel Emelyanov67727182008-03-26 16:27:22 -0700254 err = vlan_group_prealloc_vid(grp, vlan_id);
255 if (err < 0)
Patrick McHardy70c03b42008-07-05 21:26:57 -0700256 goto out_uninit_applicant;
Pavel Emelyanov67727182008-03-26 16:27:22 -0700257
Patrick McHardye89fe422007-06-13 12:06:29 -0700258 err = register_netdevice(dev);
259 if (err < 0)
Patrick McHardy70c03b42008-07-05 21:26:57 -0700260 goto out_uninit_applicant;
Patrick McHardye89fe422007-06-13 12:06:29 -0700261
262 /* Account for reference in struct vlan_dev_info */
263 dev_hold(real_dev);
264
265 vlan_transfer_operstate(real_dev, dev);
266 linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
267
268 /* So, got the sucker initialized, now lets place
269 * it into our local structure.
270 */
271 vlan_group_set_device(grp, vlan_id, dev);
Patrick McHardyaf301512008-01-21 00:25:50 -0800272 grp->nr_vlans++;
273
Patrick McHardye89fe422007-06-13 12:06:29 -0700274 if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX)
Stephen Hemminger656299f2008-11-19 21:53:47 -0800275 ops->ndo_vlan_rx_register(real_dev, ngrp);
Patrick McHardye89fe422007-06-13 12:06:29 -0700276 if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
Stephen Hemminger656299f2008-11-19 21:53:47 -0800277 ops->ndo_vlan_rx_add_vid(real_dev, vlan_id);
Patrick McHardye89fe422007-06-13 12:06:29 -0700278
Patrick McHardye89fe422007-06-13 12:06:29 -0700279 return 0;
280
Patrick McHardy70c03b42008-07-05 21:26:57 -0700281out_uninit_applicant:
282 if (ngrp)
283 vlan_gvrp_uninit_applicant(real_dev);
Patrick McHardye89fe422007-06-13 12:06:29 -0700284out_free_group:
Eric Dumazet6b863d12009-11-17 06:45:04 -0800285 if (ngrp) {
286 hlist_del_rcu(&ngrp->hlist);
287 /* Free the group, after all cpu's are done. */
288 call_rcu(&ngrp->rcu, vlan_rcu_free);
289 }
Patrick McHardye89fe422007-06-13 12:06:29 -0700290 return err;
291}
292
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293/* Attach a VLAN device to a mac address (ie Ethernet Card).
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700294 * Returns 0 if the device was created or a negative error code otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 */
Patrick McHardy9bb85822008-07-08 03:24:44 -0700296static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 struct net_device *new_dev;
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700299 struct net *net = dev_net(real_dev);
300 struct vlan_net *vn = net_generic(net, vlan_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 char name[IFNAMSIZ];
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700302 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
Patrick McHardy9bb85822008-07-08 03:24:44 -0700304 if (vlan_id >= VLAN_VID_MASK)
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700305 return -ERANGE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306
Patrick McHardy9bb85822008-07-08 03:24:44 -0700307 err = vlan_check_real_dev(real_dev, vlan_id);
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700308 if (err < 0)
309 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310
311 /* Gotta set up the fields for the device. */
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700312 switch (vn->name_type) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 case VLAN_NAME_TYPE_RAW_PLUS_VID:
314 /* name will look like: eth1.0005 */
Patrick McHardy9bb85822008-07-08 03:24:44 -0700315 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 break;
317 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
318 /* Put our vlan.VID in the name.
319 * Name will look like: vlan5
320 */
Patrick McHardy9bb85822008-07-08 03:24:44 -0700321 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 break;
323 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
324 /* Put our vlan.VID in the name.
325 * Name will look like: eth0.5
326 */
Patrick McHardy9bb85822008-07-08 03:24:44 -0700327 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 break;
329 case VLAN_NAME_TYPE_PLUS_VID:
330 /* Put our vlan.VID in the name.
331 * Name will look like: vlan0005
332 */
333 default:
Patrick McHardy9bb85822008-07-08 03:24:44 -0700334 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700335 }
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900336
Eric Dumazet2e59af32009-09-02 18:03:00 -0700337 new_dev = alloc_netdev_mq(sizeof(struct vlan_dev_info), name,
338 vlan_setup, real_dev->num_tx_queues);
Arjan van de Ven5dd8d1e2006-07-03 00:25:33 -0700339
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 if (new_dev == NULL)
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700341 return -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
Eric Dumazet2e59af32009-09-02 18:03:00 -0700343 new_dev->real_num_tx_queues = real_dev->real_num_tx_queues;
Pavel Emelyanov65d292a2008-04-16 00:55:06 -0700344 dev_net_set(new_dev, net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 /* need 4 bytes for extra VLAN header info,
346 * hope the underlying device can handle it.
347 */
348 new_dev->mtu = real_dev->mtu;
349
Patrick McHardy9bb85822008-07-08 03:24:44 -0700350 vlan_dev_info(new_dev)->vlan_id = vlan_id;
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800351 vlan_dev_info(new_dev)->real_dev = real_dev;
352 vlan_dev_info(new_dev)->dent = NULL;
353 vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354
Patrick McHardy07b5b172007-06-13 12:07:54 -0700355 new_dev->rtnl_link_ops = &vlan_link_ops;
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700356 err = register_vlan_dev(new_dev);
357 if (err < 0)
Patrick McHardye89fe422007-06-13 12:06:29 -0700358 goto out_free_newdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700360 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362out_free_newdev:
363 free_netdev(new_dev);
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700364 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365}
366
Patrick McHardy8c979c22007-07-11 19:45:24 -0700367static void vlan_sync_address(struct net_device *dev,
368 struct net_device *vlandev)
369{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800370 struct vlan_dev_info *vlan = vlan_dev_info(vlandev);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700371
372 /* May be called without an actual change */
373 if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr))
374 return;
375
376 /* vlan address was different from the old address and is equal to
377 * the new address */
378 if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
379 !compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
Jiri Pirkoccffad252009-05-22 23:22:17 +0000380 dev_unicast_delete(dev, vlandev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700381
382 /* vlan address was equal to the old address and is different from
383 * the new address */
384 if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
385 compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
Jiri Pirkoccffad252009-05-22 23:22:17 +0000386 dev_unicast_add(dev, vlandev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700387
388 memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN);
389}
390
Patrick McHardy5fb13572008-05-20 14:54:50 -0700391static void vlan_transfer_features(struct net_device *dev,
392 struct net_device *vlandev)
393{
394 unsigned long old_features = vlandev->features;
395
Patrick McHardy289c79a2008-05-23 00:22:04 -0700396 vlandev->features &= ~dev->vlan_features;
397 vlandev->features |= dev->features & dev->vlan_features;
Alexander Duyck1ae4be22008-09-11 20:17:05 -0700398 vlandev->gso_max_size = dev->gso_max_size;
Vasu Devb85daa52009-08-14 12:41:07 +0000399#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
400 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
401#endif
Patrick McHardy5fb13572008-05-20 14:54:50 -0700402
403 if (old_features != vlandev->features)
404 netdev_features_change(vlandev);
405}
406
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700407static void __vlan_device_event(struct net_device *dev, unsigned long event)
408{
409 switch (event) {
410 case NETDEV_CHANGENAME:
411 vlan_proc_rem_dev(dev);
412 if (vlan_proc_add_dev(dev) < 0)
413 pr_warning("8021q: failed to change proc name for %s\n",
414 dev->name);
415 break;
Pavel Emelyanov30688a92008-04-16 00:57:01 -0700416 case NETDEV_REGISTER:
417 if (vlan_proc_add_dev(dev) < 0)
418 pr_warning("8021q: failed to add proc entry for %s\n",
419 dev->name);
420 break;
421 case NETDEV_UNREGISTER:
422 vlan_proc_rem_dev(dev);
423 break;
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700424 }
425}
426
Patrick McHardy2029cc22008-01-21 00:26:41 -0800427static int vlan_device_event(struct notifier_block *unused, unsigned long event,
428 void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429{
430 struct net_device *dev = ptr;
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700431 struct vlan_group *grp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 int i, flgs;
433 struct net_device *vlandev;
Patrick McHardy5e756592009-11-25 07:54:54 +0000434 struct vlan_dev_info *vlan;
Patrick McHardy29906f62009-10-29 23:43:00 -0700435 LIST_HEAD(list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436
Patrick McHardy81d85342008-05-20 14:37:36 -0700437 if (is_vlan_dev(dev))
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700438 __vlan_device_event(dev, event);
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700439
Pavel Emelyanova9fde262008-04-16 00:48:04 -0700440 grp = __vlan_find_group(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 if (!grp)
442 goto out;
443
444 /* It is OK that we do not hold the group lock right now,
445 * as we run under the RTNL lock.
446 */
447
448 switch (event) {
449 case NETDEV_CHANGE:
450 /* Propagate real device state to vlan devices */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
Dan Aloni5c15bde2007-03-02 20:44:51 -0800452 vlandev = vlan_group_get_device(grp, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 if (!vlandev)
454 continue;
455
Stefan Rompfddd7bf92006-03-20 17:11:41 -0800456 vlan_transfer_operstate(dev, vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 }
458 break;
459
Patrick McHardy8c979c22007-07-11 19:45:24 -0700460 case NETDEV_CHANGEADDR:
461 /* Adjust unicast filters on underlying device */
462 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
463 vlandev = vlan_group_get_device(grp, i);
464 if (!vlandev)
465 continue;
466
Patrick McHardyd932e042007-11-10 21:51:40 -0800467 flgs = vlandev->flags;
468 if (!(flgs & IFF_UP))
469 continue;
470
Patrick McHardy8c979c22007-07-11 19:45:24 -0700471 vlan_sync_address(dev, vlandev);
472 }
473 break;
474
Herbert Xu2e477c92009-07-20 07:35:37 -0700475 case NETDEV_CHANGEMTU:
476 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
477 vlandev = vlan_group_get_device(grp, i);
478 if (!vlandev)
479 continue;
480
481 if (vlandev->mtu <= dev->mtu)
482 continue;
483
484 dev_set_mtu(vlandev, dev->mtu);
485 }
486 break;
487
Patrick McHardy5fb13572008-05-20 14:54:50 -0700488 case NETDEV_FEAT_CHANGE:
489 /* Propagate device features to underlying device */
490 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
491 vlandev = vlan_group_get_device(grp, i);
492 if (!vlandev)
493 continue;
494
495 vlan_transfer_features(dev, vlandev);
496 }
497
498 break;
499
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 case NETDEV_DOWN:
501 /* Put all VLANs for this dev in the down state too. */
502 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
Dan Aloni5c15bde2007-03-02 20:44:51 -0800503 vlandev = vlan_group_get_device(grp, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 if (!vlandev)
505 continue;
506
507 flgs = vlandev->flags;
508 if (!(flgs & IFF_UP))
509 continue;
510
Patrick McHardy5e756592009-11-25 07:54:54 +0000511 vlan = vlan_dev_info(vlandev);
512 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
513 dev_change_flags(vlandev, flgs & ~IFF_UP);
Jay Vosburghadc667e2009-04-25 18:03:35 -0700514 vlan_transfer_operstate(dev, vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 }
516 break;
517
518 case NETDEV_UP:
519 /* Put all VLANs for this dev in the up state too. */
520 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
Dan Aloni5c15bde2007-03-02 20:44:51 -0800521 vlandev = vlan_group_get_device(grp, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 if (!vlandev)
523 continue;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900524
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 flgs = vlandev->flags;
526 if (flgs & IFF_UP)
527 continue;
528
Patrick McHardy5e756592009-11-25 07:54:54 +0000529 vlan = vlan_dev_info(vlandev);
530 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
531 dev_change_flags(vlandev, flgs | IFF_UP);
Jay Vosburghadc667e2009-04-25 18:03:35 -0700532 vlan_transfer_operstate(dev, vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 }
534 break;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900535
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 case NETDEV_UNREGISTER:
Patrick McHardy29906f62009-10-29 23:43:00 -0700537 /* Delete all VLANs for this dev. */
538 grp->killall = 1;
539
540 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
541 vlandev = vlan_group_get_device(grp, i);
542 if (!vlandev)
543 continue;
544
545 /* unregistration of last vlan destroys group, abort
546 * afterwards */
547 if (grp->nr_vlans == 1)
548 i = VLAN_GROUP_ARRAY_LEN;
549
550 unregister_vlan_dev(vlandev, &list);
551 }
552 unregister_netdevice_many(&list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700554 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555
556out:
557 return NOTIFY_DONE;
558}
559
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800560static struct notifier_block vlan_notifier_block __read_mostly = {
561 .notifier_call = vlan_device_event,
562};
563
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564/*
565 * VLAN IOCTL handler.
566 * o execute requested action or pass command to the device driver
567 * arg is really a struct vlan_ioctl_args __user *.
568 */
Eric W. Biederman881d9662007-09-17 11:56:21 -0700569static int vlan_ioctl_handler(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570{
Patrick McHardyc17d8872007-06-13 12:05:22 -0700571 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 struct vlan_ioctl_args args;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700573 struct net_device *dev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574
575 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
576 return -EFAULT;
577
578 /* Null terminate this sucker, just in case. */
579 args.device1[23] = 0;
580 args.u.device2[23] = 0;
581
Patrick McHardyc17d8872007-06-13 12:05:22 -0700582 rtnl_lock();
583
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 switch (args.cmd) {
585 case SET_VLAN_INGRESS_PRIORITY_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700586 case SET_VLAN_EGRESS_PRIORITY_CMD:
587 case SET_VLAN_FLAG_CMD:
588 case ADD_VLAN_CMD:
589 case DEL_VLAN_CMD:
590 case GET_VLAN_REALDEV_NAME_CMD:
591 case GET_VLAN_VID_CMD:
592 err = -ENODEV;
Pavel Emelyanov65d292a2008-04-16 00:55:06 -0700593 dev = __dev_get_by_name(net, args.device1);
Patrick McHardyc17d8872007-06-13 12:05:22 -0700594 if (!dev)
595 goto out;
596
597 err = -EINVAL;
Joonwoo Park26a25232008-07-08 03:22:16 -0700598 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700599 goto out;
600 }
601
602 switch (args.cmd) {
603 case SET_VLAN_INGRESS_PRIORITY_CMD:
604 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 if (!capable(CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700606 break;
607 vlan_dev_set_ingress_priority(dev,
608 args.u.skb_priority,
609 args.vlan_qos);
Patrick McHardyfffe4702007-11-07 01:31:32 -0800610 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 break;
612
613 case SET_VLAN_EGRESS_PRIORITY_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700614 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 if (!capable(CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700616 break;
617 err = vlan_dev_set_egress_priority(dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 args.u.skb_priority,
619 args.vlan_qos);
620 break;
621
622 case SET_VLAN_FLAG_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700623 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 if (!capable(CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700625 break;
Patrick McHardyb3ce0322008-07-05 21:26:27 -0700626 err = vlan_dev_change_flags(dev,
627 args.vlan_qos ? args.u.flag : 0,
628 args.u.flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 break;
630
631 case SET_VLAN_NAME_TYPE_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700632 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 if (!capable(CAP_NET_ADMIN))
Pavel Emelyanove35de022007-12-06 22:52:16 -0800634 break;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700635 if ((args.u.name_type >= 0) &&
636 (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700637 struct vlan_net *vn;
638
639 vn = net_generic(net, vlan_net_id);
640 vn->name_type = args.u.name_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 err = 0;
642 } else {
643 err = -EINVAL;
644 }
645 break;
646
647 case ADD_VLAN_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700648 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 if (!capable(CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700650 break;
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700651 err = register_vlan_device(dev, args.u.VID);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 break;
653
654 case DEL_VLAN_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700655 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 if (!capable(CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700657 break;
Eric Dumazet23289a32009-10-27 07:06:36 +0000658 unregister_vlan_dev(dev, NULL);
Patrick McHardyaf301512008-01-21 00:25:50 -0800659 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 break;
661
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 case GET_VLAN_REALDEV_NAME_CMD:
Andrew Morton3f5f4342007-07-24 15:37:11 -0700663 err = 0;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700664 vlan_dev_get_realdev_name(dev, args.u.device2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 if (copy_to_user(arg, &args,
Patrick McHardy2029cc22008-01-21 00:26:41 -0800666 sizeof(struct vlan_ioctl_args)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 break;
669
670 case GET_VLAN_VID_CMD:
Andrew Morton3f5f4342007-07-24 15:37:11 -0700671 err = 0;
Patrick McHardy22d1ba72008-07-08 03:23:57 -0700672 args.u.VID = vlan_dev_vlan_id(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 if (copy_to_user(arg, &args,
Patrick McHardy2029cc22008-01-21 00:26:41 -0800674 sizeof(struct vlan_ioctl_args)))
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900675 err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 break;
677
678 default:
Patrick McHardy198a2912008-01-21 00:24:59 -0800679 err = -EOPNOTSUPP;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700680 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700681 }
Mika Kukkonen7eb1b3d2005-12-21 18:39:49 -0800682out:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700683 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 return err;
685}
686
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700687static int vlan_init_net(struct net *net)
688{
Eric W. Biederman946d1a92009-11-29 15:46:05 +0000689 struct vlan_net *vn = net_generic(net, vlan_net_id);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700690 int err;
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700691
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700692 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
693
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700694 err = vlan_proc_init(net);
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700695
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700696 return err;
697}
698
699static void vlan_exit_net(struct net *net)
700{
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700701 vlan_proc_cleanup(net);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700702}
703
704static struct pernet_operations vlan_net_ops = {
705 .init = vlan_init_net,
706 .exit = vlan_exit_net,
Eric W. Biederman946d1a92009-11-29 15:46:05 +0000707 .id = &vlan_net_id,
708 .size = sizeof(struct vlan_net),
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700709};
710
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800711static int __init vlan_proto_init(void)
712{
713 int err;
714
715 pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright);
716 pr_info("All bugs added by %s\n", vlan_buggyright);
717
Eric W. Biederman91e2ff32009-12-02 13:19:08 +0000718 err = register_pernet_subsys(&vlan_net_ops);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700719 if (err < 0)
720 goto err0;
721
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800722 err = register_netdevice_notifier(&vlan_notifier_block);
723 if (err < 0)
724 goto err2;
725
Patrick McHardy70c03b42008-07-05 21:26:57 -0700726 err = vlan_gvrp_init();
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800727 if (err < 0)
728 goto err3;
729
Patrick McHardy70c03b42008-07-05 21:26:57 -0700730 err = vlan_netlink_init();
731 if (err < 0)
732 goto err4;
733
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800734 dev_add_pack(&vlan_packet_type);
735 vlan_ioctl_set(vlan_ioctl_handler);
736 return 0;
737
Patrick McHardy70c03b42008-07-05 21:26:57 -0700738err4:
739 vlan_gvrp_uninit();
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800740err3:
741 unregister_netdevice_notifier(&vlan_notifier_block);
742err2:
Eric W. Biederman91e2ff32009-12-02 13:19:08 +0000743 unregister_pernet_subsys(&vlan_net_ops);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700744err0:
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800745 return err;
746}
747
748static void __exit vlan_cleanup_module(void)
749{
750 unsigned int i;
751
752 vlan_ioctl_set(NULL);
753 vlan_netlink_fini();
754
755 unregister_netdevice_notifier(&vlan_notifier_block);
756
757 dev_remove_pack(&vlan_packet_type);
758
759 /* This table must be empty if there are no module references left. */
760 for (i = 0; i < VLAN_GRP_HASH_SIZE; i++)
761 BUG_ON(!hlist_empty(&vlan_group_hash[i]));
762
Eric W. Biederman91e2ff32009-12-02 13:19:08 +0000763 unregister_pernet_subsys(&vlan_net_ops);
Jesper Dangaard Brouer6e327c12009-06-08 03:11:28 +0000764 rcu_barrier(); /* Wait for completion of call_rcu()'s */
Patrick McHardy70c03b42008-07-05 21:26:57 -0700765
766 vlan_gvrp_uninit();
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800767}
768
769module_init(vlan_proto_init);
770module_exit(vlan_cleanup_module);
771
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772MODULE_LICENSE("GPL");
773MODULE_VERSION(DRV_VERSION);