blob: efea35b02e7ff989745c53844b06ab190d0fcc6a [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
Joe Perchesafab2d22011-05-26 10:58:31 +000021#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
22
Randy Dunlap4fc268d2006-01-11 12:17:47 -080023#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/module.h>
25#include <linux/netdevice.h>
26#include <linux/skbuff.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090027#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/init.h>
Franck Bui-Huu82524742008-05-12 21:21:05 +020029#include <linux/rculist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <net/p8022.h>
31#include <net/arp.h>
32#include <linux/rtnetlink.h>
33#include <linux/notifier.h>
Patrick McHardy61362762008-07-14 22:51:55 -070034#include <net/rtnetlink.h>
Eric W. Biedermane9dc8652007-09-12 13:02:17 +020035#include <net/net_namespace.h>
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -070036#include <net/netns/generic.h>
Patrick McHardy61362762008-07-14 22:51:55 -070037#include <asm/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
39#include <linux/if_vlan.h>
40#include "vlan.h"
41#include "vlanproc.h"
42
43#define DRV_VERSION "1.8"
44
45/* Global VLAN variables */
46
Eric Dumazetf99189b2009-11-17 10:42:49 +000047int vlan_net_id __read_mostly;
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -070048
Stephen Hemmingerb30200612008-10-28 22:12:36 -070049const char vlan_fullname[] = "802.1Q VLAN Support";
50const char vlan_version[] = DRV_VERSION;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Linus Torvalds1da177e2005-04-16 15:20:36 -070052/* End of global variables definitions. */
53
Patrick McHardy9bb85822008-07-08 03:24:44 -070054static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id)
Pavel Emelyanov67727182008-03-26 16:27:22 -070055{
56 struct net_device **array;
57 unsigned int size;
58
59 ASSERT_RTNL();
60
Patrick McHardy9bb85822008-07-08 03:24:44 -070061 array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
Pavel Emelyanov67727182008-03-26 16:27:22 -070062 if (array != NULL)
63 return 0;
64
65 size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN;
66 array = kzalloc(size, GFP_KERNEL);
67 if (array == NULL)
68 return -ENOBUFS;
69
Patrick McHardy9bb85822008-07-08 03:24:44 -070070 vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array;
Pavel Emelyanov67727182008-03-26 16:27:22 -070071 return 0;
Patrick McHardy42429aa2007-06-13 12:05:59 -070072}
73
Eric Dumazet23289a32009-10-27 07:06:36 +000074void unregister_vlan_dev(struct net_device *dev, struct list_head *head)
Linus Torvalds1da177e2005-04-16 15:20:36 -070075{
Jiri Pirko7da82c02011-12-08 04:11:15 +000076 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
Patrick McHardyaf301512008-01-21 00:25:50 -080077 struct net_device *real_dev = vlan->real_dev;
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +000078 struct vlan_info *vlan_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 struct vlan_group *grp;
Patrick McHardy9bb85822008-07-08 03:24:44 -070080 u16 vlan_id = vlan->vlan_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
82 ASSERT_RTNL();
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +000084 vlan_info = rtnl_dereference(real_dev->vlan_info);
85 BUG_ON(!vlan_info);
86
87 grp = &vlan_info->grp;
Patrick McHardyacc5efb2008-01-21 00:25:31 -080088
Patrick McHardyacc5efb2008-01-21 00:25:31 -080089 /* Take it out of our own structures, but be sure to interlock with
Pedro Garciaad1afb02010-07-18 15:38:44 -070090 * HW accelerating devices or SW vlan input packet processing if
91 * VLAN is not 0 (leave it there for 802.1p).
Patrick McHardyacc5efb2008-01-21 00:25:31 -080092 */
Jiri Pirko87002b02011-12-08 04:11:17 +000093 if (vlan_id)
94 vlan_vid_del(real_dev, vlan_id);
Patrick McHardyacc5efb2008-01-21 00:25:31 -080095
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +000096 grp->nr_vlan_devs--;
Patrick McHardyaf301512008-01-21 00:25:50 -080097
Eric Dumazet55aee102011-05-10 12:22:54 -070098 if (vlan->flags & VLAN_FLAG_GVRP)
99 vlan_gvrp_request_leave(dev);
100
Patrick McHardy29906f62009-10-29 23:43:00 -0700101 vlan_group_set_device(grp, vlan_id, NULL);
Eric Dumazet48752e12011-05-09 04:40:44 +0000102 /* Because unregister_netdevice_queue() makes sure at least one rcu
103 * grace period is respected before device freeing,
104 * we dont need to call synchronize_net() here.
105 */
Eric Dumazet23289a32009-10-27 07:06:36 +0000106 unregister_netdevice_queue(dev, head);
Patrick McHardyce305002008-07-05 21:26:41 -0700107
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000108 if (grp->nr_vlan_devs == 0)
Patrick McHardy70c03b42008-07-05 21:26:57 -0700109 vlan_gvrp_uninit_applicant(real_dev);
110
Patrick McHardyaf301512008-01-21 00:25:50 -0800111 /* Get rid of the vlan's reference to real_dev */
112 dev_put(real_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113}
114
Patrick McHardy9bb85822008-07-08 03:24:44 -0700115int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id)
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700116{
Stephen Hemminger656299f2008-11-19 21:53:47 -0800117 const char *name = real_dev->name;
118 const struct net_device_ops *ops = real_dev->netdev_ops;
Patrick McHardy40f98e12008-01-21 00:24:30 -0800119
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700120 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
Joe Perchesafab2d22011-05-26 10:58:31 +0000121 pr_info("VLANs not supported on %s\n", name);
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700122 return -EOPNOTSUPP;
123 }
124
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700125 if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) &&
Stephen Hemminger656299f2008-11-19 21:53:47 -0800126 (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) {
Joe Perchesafab2d22011-05-26 10:58:31 +0000127 pr_info("Device %s has buggy VLAN hw accel\n", name);
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700128 return -EOPNOTSUPP;
129 }
130
Jesse Gross65ac6a52010-10-20 13:56:05 +0000131 if (vlan_find_dev(real_dev, vlan_id) != NULL)
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700132 return -EEXIST;
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700133
134 return 0;
135}
136
Patrick McHardy07b5b172007-06-13 12:07:54 -0700137int register_vlan_dev(struct net_device *dev)
Patrick McHardye89fe422007-06-13 12:06:29 -0700138{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000139 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
Patrick McHardye89fe422007-06-13 12:06:29 -0700140 struct net_device *real_dev = vlan->real_dev;
Patrick McHardy9bb85822008-07-08 03:24:44 -0700141 u16 vlan_id = vlan->vlan_id;
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000142 struct vlan_info *vlan_info;
143 struct vlan_group *grp;
Patrick McHardye89fe422007-06-13 12:06:29 -0700144 int err;
145
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000146 err = vlan_vid_add(real_dev, vlan_id);
147 if (err)
148 return err;
149
150 vlan_info = rtnl_dereference(real_dev->vlan_info);
151 /* vlan_info should be there now. vlan_vid_add took care of it */
152 BUG_ON(!vlan_info);
153
154 grp = &vlan_info->grp;
155 if (grp->nr_vlan_devs == 0) {
Patrick McHardy70c03b42008-07-05 21:26:57 -0700156 err = vlan_gvrp_init_applicant(real_dev);
157 if (err < 0)
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000158 goto out_vid_del;
Patrick McHardye89fe422007-06-13 12:06:29 -0700159 }
160
Pavel Emelyanov67727182008-03-26 16:27:22 -0700161 err = vlan_group_prealloc_vid(grp, vlan_id);
162 if (err < 0)
Patrick McHardy70c03b42008-07-05 21:26:57 -0700163 goto out_uninit_applicant;
Pavel Emelyanov67727182008-03-26 16:27:22 -0700164
Patrick McHardye89fe422007-06-13 12:06:29 -0700165 err = register_netdevice(dev);
166 if (err < 0)
Patrick McHardy70c03b42008-07-05 21:26:57 -0700167 goto out_uninit_applicant;
Patrick McHardye89fe422007-06-13 12:06:29 -0700168
Jiri Pirko7da82c02011-12-08 04:11:15 +0000169 /* Account for reference in struct vlan_dev_priv */
Patrick McHardye89fe422007-06-13 12:06:29 -0700170 dev_hold(real_dev);
171
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800172 netif_stacked_transfer_operstate(real_dev, dev);
Patrick McHardye89fe422007-06-13 12:06:29 -0700173 linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
174
175 /* So, got the sucker initialized, now lets place
176 * it into our local structure.
177 */
178 vlan_group_set_device(grp, vlan_id, dev);
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000179 grp->nr_vlan_devs++;
Patrick McHardye89fe422007-06-13 12:06:29 -0700180
Patrick McHardye89fe422007-06-13 12:06:29 -0700181 return 0;
182
Patrick McHardy70c03b42008-07-05 21:26:57 -0700183out_uninit_applicant:
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000184 if (grp->nr_vlan_devs == 0)
Patrick McHardy70c03b42008-07-05 21:26:57 -0700185 vlan_gvrp_uninit_applicant(real_dev);
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000186out_vid_del:
187 vlan_vid_del(real_dev, vlan_id);
Patrick McHardye89fe422007-06-13 12:06:29 -0700188 return err;
189}
190
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191/* Attach a VLAN device to a mac address (ie Ethernet Card).
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700192 * Returns 0 if the device was created or a negative error code otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 */
Patrick McHardy9bb85822008-07-08 03:24:44 -0700194static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 struct net_device *new_dev;
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700197 struct net *net = dev_net(real_dev);
198 struct vlan_net *vn = net_generic(net, vlan_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 char name[IFNAMSIZ];
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700200 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201
Patrick McHardy9bb85822008-07-08 03:24:44 -0700202 if (vlan_id >= VLAN_VID_MASK)
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700203 return -ERANGE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
Patrick McHardy9bb85822008-07-08 03:24:44 -0700205 err = vlan_check_real_dev(real_dev, vlan_id);
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700206 if (err < 0)
207 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
209 /* Gotta set up the fields for the device. */
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700210 switch (vn->name_type) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 case VLAN_NAME_TYPE_RAW_PLUS_VID:
212 /* name will look like: eth1.0005 */
Patrick McHardy9bb85822008-07-08 03:24:44 -0700213 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 break;
215 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
216 /* Put our vlan.VID in the name.
217 * Name will look like: vlan5
218 */
Patrick McHardy9bb85822008-07-08 03:24:44 -0700219 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 break;
221 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
222 /* Put our vlan.VID in the name.
223 * Name will look like: eth0.5
224 */
Patrick McHardy9bb85822008-07-08 03:24:44 -0700225 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 break;
227 case VLAN_NAME_TYPE_PLUS_VID:
228 /* Put our vlan.VID in the name.
229 * Name will look like: vlan0005
230 */
231 default:
Patrick McHardy9bb85822008-07-08 03:24:44 -0700232 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700233 }
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900234
Jiri Pirko7da82c02011-12-08 04:11:15 +0000235 new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, vlan_setup);
Arjan van de Ven5dd8d1e2006-07-03 00:25:33 -0700236
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 if (new_dev == NULL)
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700238 return -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
Pavel Emelyanov65d292a2008-04-16 00:55:06 -0700240 dev_net_set(new_dev, net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 /* need 4 bytes for extra VLAN header info,
242 * hope the underlying device can handle it.
243 */
244 new_dev->mtu = real_dev->mtu;
245
Jiri Pirko7da82c02011-12-08 04:11:15 +0000246 vlan_dev_priv(new_dev)->vlan_id = vlan_id;
247 vlan_dev_priv(new_dev)->real_dev = real_dev;
248 vlan_dev_priv(new_dev)->dent = NULL;
249 vlan_dev_priv(new_dev)->flags = VLAN_FLAG_REORDER_HDR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
Patrick McHardy07b5b172007-06-13 12:07:54 -0700251 new_dev->rtnl_link_ops = &vlan_link_ops;
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700252 err = register_vlan_dev(new_dev);
253 if (err < 0)
Patrick McHardye89fe422007-06-13 12:06:29 -0700254 goto out_free_newdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700256 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258out_free_newdev:
259 free_netdev(new_dev);
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700260 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261}
262
Patrick McHardy8c979c22007-07-11 19:45:24 -0700263static void vlan_sync_address(struct net_device *dev,
264 struct net_device *vlandev)
265{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000266 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700267
268 /* May be called without an actual change */
269 if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr))
270 return;
271
272 /* vlan address was different from the old address and is equal to
273 * the new address */
274 if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
275 !compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000276 dev_uc_del(dev, vlandev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700277
278 /* vlan address was equal to the old address and is different from
279 * the new address */
280 if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
281 compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000282 dev_uc_add(dev, vlandev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700283
284 memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN);
285}
286
Patrick McHardy5fb13572008-05-20 14:54:50 -0700287static void vlan_transfer_features(struct net_device *dev,
288 struct net_device *vlandev)
289{
Alexander Duyck1ae4be22008-09-11 20:17:05 -0700290 vlandev->gso_max_size = dev->gso_max_size;
John Fastabend029f5fc2010-10-30 14:22:32 +0000291
292 if (dev->features & NETIF_F_HW_VLAN_TX)
293 vlandev->hard_header_len = dev->hard_header_len;
294 else
295 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
296
Vasu Devb85daa52009-08-14 12:41:07 +0000297#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
298 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
299#endif
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700300
301 netdev_update_features(vlandev);
Patrick McHardy5fb13572008-05-20 14:54:50 -0700302}
303
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700304static void __vlan_device_event(struct net_device *dev, unsigned long event)
305{
306 switch (event) {
307 case NETDEV_CHANGENAME:
308 vlan_proc_rem_dev(dev);
309 if (vlan_proc_add_dev(dev) < 0)
Joe Perchesafab2d22011-05-26 10:58:31 +0000310 pr_warn("failed to change proc name for %s\n",
311 dev->name);
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700312 break;
Pavel Emelyanov30688a92008-04-16 00:57:01 -0700313 case NETDEV_REGISTER:
314 if (vlan_proc_add_dev(dev) < 0)
Joe Perchesafab2d22011-05-26 10:58:31 +0000315 pr_warn("failed to add proc entry for %s\n", dev->name);
Pavel Emelyanov30688a92008-04-16 00:57:01 -0700316 break;
317 case NETDEV_UNREGISTER:
318 vlan_proc_rem_dev(dev);
319 break;
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700320 }
321}
322
Patrick McHardy2029cc22008-01-21 00:26:41 -0800323static int vlan_device_event(struct notifier_block *unused, unsigned long event,
324 void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325{
326 struct net_device *dev = ptr;
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700327 struct vlan_group *grp;
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000328 struct vlan_info *vlan_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 int i, flgs;
330 struct net_device *vlandev;
Jiri Pirko7da82c02011-12-08 04:11:15 +0000331 struct vlan_dev_priv *vlan;
Patrick McHardy29906f62009-10-29 23:43:00 -0700332 LIST_HEAD(list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
Patrick McHardy81d85342008-05-20 14:37:36 -0700334 if (is_vlan_dev(dev))
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700335 __vlan_device_event(dev, event);
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700336
Pedro Garciaad1afb02010-07-18 15:38:44 -0700337 if ((event == NETDEV_UP) &&
Jiri Pirko87002b02011-12-08 04:11:17 +0000338 (dev->features & NETIF_F_HW_VLAN_FILTER)) {
Joe Perchesafab2d22011-05-26 10:58:31 +0000339 pr_info("adding VLAN 0 to HW filter on device %s\n",
Pedro Garciaad1afb02010-07-18 15:38:44 -0700340 dev->name);
Jiri Pirko87002b02011-12-08 04:11:17 +0000341 vlan_vid_add(dev, 0);
Pedro Garciaad1afb02010-07-18 15:38:44 -0700342 }
343
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000344 vlan_info = rtnl_dereference(dev->vlan_info);
345 if (!vlan_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 goto out;
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000347 grp = &vlan_info->grp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
349 /* It is OK that we do not hold the group lock right now,
350 * as we run under the RTNL lock.
351 */
352
353 switch (event) {
354 case NETDEV_CHANGE:
355 /* Propagate real device state to vlan devices */
Jesse Grossb7381272010-10-20 13:56:02 +0000356 for (i = 0; i < VLAN_N_VID; i++) {
Dan Aloni5c15bde2007-03-02 20:44:51 -0800357 vlandev = vlan_group_get_device(grp, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 if (!vlandev)
359 continue;
360
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800361 netif_stacked_transfer_operstate(dev, vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 }
363 break;
364
Patrick McHardy8c979c22007-07-11 19:45:24 -0700365 case NETDEV_CHANGEADDR:
366 /* Adjust unicast filters on underlying device */
Jesse Grossb7381272010-10-20 13:56:02 +0000367 for (i = 0; i < VLAN_N_VID; i++) {
Patrick McHardy8c979c22007-07-11 19:45:24 -0700368 vlandev = vlan_group_get_device(grp, i);
369 if (!vlandev)
370 continue;
371
Patrick McHardyd932e042007-11-10 21:51:40 -0800372 flgs = vlandev->flags;
373 if (!(flgs & IFF_UP))
374 continue;
375
Patrick McHardy8c979c22007-07-11 19:45:24 -0700376 vlan_sync_address(dev, vlandev);
377 }
378 break;
379
Herbert Xu2e477c92009-07-20 07:35:37 -0700380 case NETDEV_CHANGEMTU:
Jesse Grossb7381272010-10-20 13:56:02 +0000381 for (i = 0; i < VLAN_N_VID; i++) {
Herbert Xu2e477c92009-07-20 07:35:37 -0700382 vlandev = vlan_group_get_device(grp, i);
383 if (!vlandev)
384 continue;
385
386 if (vlandev->mtu <= dev->mtu)
387 continue;
388
389 dev_set_mtu(vlandev, dev->mtu);
390 }
391 break;
392
Patrick McHardy5fb13572008-05-20 14:54:50 -0700393 case NETDEV_FEAT_CHANGE:
394 /* Propagate device features to underlying device */
Jesse Grossb7381272010-10-20 13:56:02 +0000395 for (i = 0; i < VLAN_N_VID; i++) {
Patrick McHardy5fb13572008-05-20 14:54:50 -0700396 vlandev = vlan_group_get_device(grp, i);
397 if (!vlandev)
398 continue;
399
400 vlan_transfer_features(dev, vlandev);
401 }
402
403 break;
404
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 case NETDEV_DOWN:
406 /* Put all VLANs for this dev in the down state too. */
Jesse Grossb7381272010-10-20 13:56:02 +0000407 for (i = 0; i < VLAN_N_VID; i++) {
Dan Aloni5c15bde2007-03-02 20:44:51 -0800408 vlandev = vlan_group_get_device(grp, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 if (!vlandev)
410 continue;
411
412 flgs = vlandev->flags;
413 if (!(flgs & IFF_UP))
414 continue;
415
Jiri Pirko7da82c02011-12-08 04:11:15 +0000416 vlan = vlan_dev_priv(vlandev);
Patrick McHardy5e756592009-11-25 07:54:54 +0000417 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
418 dev_change_flags(vlandev, flgs & ~IFF_UP);
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800419 netif_stacked_transfer_operstate(dev, vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 }
421 break;
422
423 case NETDEV_UP:
424 /* Put all VLANs for this dev in the up state too. */
Jesse Grossb7381272010-10-20 13:56:02 +0000425 for (i = 0; i < VLAN_N_VID; i++) {
Dan Aloni5c15bde2007-03-02 20:44:51 -0800426 vlandev = vlan_group_get_device(grp, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 if (!vlandev)
428 continue;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900429
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 flgs = vlandev->flags;
431 if (flgs & IFF_UP)
432 continue;
433
Jiri Pirko7da82c02011-12-08 04:11:15 +0000434 vlan = vlan_dev_priv(vlandev);
Patrick McHardy5e756592009-11-25 07:54:54 +0000435 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
436 dev_change_flags(vlandev, flgs | IFF_UP);
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800437 netif_stacked_transfer_operstate(dev, vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 }
439 break;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900440
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 case NETDEV_UNREGISTER:
David Lamparter3b27e102010-09-17 03:22:19 +0000442 /* twiddle thumbs on netns device moves */
443 if (dev->reg_state != NETREG_UNREGISTERING)
444 break;
445
Jesse Grossb7381272010-10-20 13:56:02 +0000446 for (i = 0; i < VLAN_N_VID; i++) {
Patrick McHardy29906f62009-10-29 23:43:00 -0700447 vlandev = vlan_group_get_device(grp, i);
448 if (!vlandev)
449 continue;
450
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000451 /* removal of last vid destroys vlan_info, abort
Patrick McHardy29906f62009-10-29 23:43:00 -0700452 * afterwards */
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000453 if (vlan_info->nr_vids == 1)
Jesse Grossb7381272010-10-20 13:56:02 +0000454 i = VLAN_N_VID;
Patrick McHardy29906f62009-10-29 23:43:00 -0700455
456 unregister_vlan_dev(vlandev, &list);
457 }
458 unregister_netdevice_many(&list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 break;
Jiri Pirko1c01fe12010-03-10 10:30:19 +0000460
461 case NETDEV_PRE_TYPE_CHANGE:
462 /* Forbid underlaying device to change its type. */
463 return NOTIFY_BAD;
Ben Hutchings99606472011-04-15 13:46:49 +0000464
465 case NETDEV_NOTIFY_PEERS:
Ben Hutchings7c899432011-04-15 13:47:51 +0000466 case NETDEV_BONDING_FAILOVER:
Ben Hutchings99606472011-04-15 13:46:49 +0000467 /* Propagate to vlan devices */
468 for (i = 0; i < VLAN_N_VID; i++) {
469 vlandev = vlan_group_get_device(grp, i);
470 if (!vlandev)
471 continue;
472
Ben Hutchings7c899432011-04-15 13:47:51 +0000473 call_netdevice_notifiers(event, vlandev);
Ben Hutchings99606472011-04-15 13:46:49 +0000474 }
475 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700476 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
478out:
479 return NOTIFY_DONE;
480}
481
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800482static struct notifier_block vlan_notifier_block __read_mostly = {
483 .notifier_call = vlan_device_event,
484};
485
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486/*
487 * VLAN IOCTL handler.
488 * o execute requested action or pass command to the device driver
489 * arg is really a struct vlan_ioctl_args __user *.
490 */
Eric W. Biederman881d9662007-09-17 11:56:21 -0700491static int vlan_ioctl_handler(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492{
Patrick McHardyc17d8872007-06-13 12:05:22 -0700493 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 struct vlan_ioctl_args args;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700495 struct net_device *dev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496
497 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
498 return -EFAULT;
499
500 /* Null terminate this sucker, just in case. */
501 args.device1[23] = 0;
502 args.u.device2[23] = 0;
503
Patrick McHardyc17d8872007-06-13 12:05:22 -0700504 rtnl_lock();
505
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 switch (args.cmd) {
507 case SET_VLAN_INGRESS_PRIORITY_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700508 case SET_VLAN_EGRESS_PRIORITY_CMD:
509 case SET_VLAN_FLAG_CMD:
510 case ADD_VLAN_CMD:
511 case DEL_VLAN_CMD:
512 case GET_VLAN_REALDEV_NAME_CMD:
513 case GET_VLAN_VID_CMD:
514 err = -ENODEV;
Pavel Emelyanov65d292a2008-04-16 00:55:06 -0700515 dev = __dev_get_by_name(net, args.device1);
Patrick McHardyc17d8872007-06-13 12:05:22 -0700516 if (!dev)
517 goto out;
518
519 err = -EINVAL;
Joonwoo Park26a25232008-07-08 03:22:16 -0700520 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700521 goto out;
522 }
523
524 switch (args.cmd) {
525 case SET_VLAN_INGRESS_PRIORITY_CMD:
526 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 if (!capable(CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700528 break;
529 vlan_dev_set_ingress_priority(dev,
530 args.u.skb_priority,
531 args.vlan_qos);
Patrick McHardyfffe4702007-11-07 01:31:32 -0800532 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 break;
534
535 case SET_VLAN_EGRESS_PRIORITY_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700536 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 if (!capable(CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700538 break;
539 err = vlan_dev_set_egress_priority(dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 args.u.skb_priority,
541 args.vlan_qos);
542 break;
543
544 case SET_VLAN_FLAG_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700545 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 if (!capable(CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700547 break;
Patrick McHardyb3ce0322008-07-05 21:26:27 -0700548 err = vlan_dev_change_flags(dev,
549 args.vlan_qos ? args.u.flag : 0,
550 args.u.flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 break;
552
553 case SET_VLAN_NAME_TYPE_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700554 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 if (!capable(CAP_NET_ADMIN))
Pavel Emelyanove35de022007-12-06 22:52:16 -0800556 break;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700557 if ((args.u.name_type >= 0) &&
558 (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700559 struct vlan_net *vn;
560
561 vn = net_generic(net, vlan_net_id);
562 vn->name_type = args.u.name_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 err = 0;
564 } else {
565 err = -EINVAL;
566 }
567 break;
568
569 case ADD_VLAN_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700570 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 if (!capable(CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700572 break;
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700573 err = register_vlan_device(dev, args.u.VID);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 break;
575
576 case DEL_VLAN_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700577 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 if (!capable(CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700579 break;
Eric Dumazet23289a32009-10-27 07:06:36 +0000580 unregister_vlan_dev(dev, NULL);
Patrick McHardyaf301512008-01-21 00:25:50 -0800581 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 break;
583
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 case GET_VLAN_REALDEV_NAME_CMD:
Andrew Morton3f5f4342007-07-24 15:37:11 -0700585 err = 0;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700586 vlan_dev_get_realdev_name(dev, args.u.device2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 if (copy_to_user(arg, &args,
Patrick McHardy2029cc22008-01-21 00:26:41 -0800588 sizeof(struct vlan_ioctl_args)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 break;
591
592 case GET_VLAN_VID_CMD:
Andrew Morton3f5f4342007-07-24 15:37:11 -0700593 err = 0;
Patrick McHardy22d1ba72008-07-08 03:23:57 -0700594 args.u.VID = vlan_dev_vlan_id(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 if (copy_to_user(arg, &args,
Patrick McHardy2029cc22008-01-21 00:26:41 -0800596 sizeof(struct vlan_ioctl_args)))
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900597 err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 break;
599
600 default:
Patrick McHardy198a2912008-01-21 00:24:59 -0800601 err = -EOPNOTSUPP;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700602 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700603 }
Mika Kukkonen7eb1b3d2005-12-21 18:39:49 -0800604out:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700605 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 return err;
607}
608
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000609static int __net_init vlan_init_net(struct net *net)
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700610{
Eric W. Biederman946d1a92009-11-29 15:46:05 +0000611 struct vlan_net *vn = net_generic(net, vlan_net_id);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700612 int err;
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700613
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700614 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
615
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700616 err = vlan_proc_init(net);
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700617
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700618 return err;
619}
620
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000621static void __net_exit vlan_exit_net(struct net *net)
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700622{
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700623 vlan_proc_cleanup(net);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700624}
625
626static struct pernet_operations vlan_net_ops = {
627 .init = vlan_init_net,
628 .exit = vlan_exit_net,
Eric W. Biederman946d1a92009-11-29 15:46:05 +0000629 .id = &vlan_net_id,
630 .size = sizeof(struct vlan_net),
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700631};
632
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800633static int __init vlan_proto_init(void)
634{
635 int err;
636
Justin Mattockda7c06c2011-05-23 20:43:48 +0000637 pr_info("%s v%s\n", vlan_fullname, vlan_version);
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800638
Eric W. Biederman91e2ff32009-12-02 13:19:08 +0000639 err = register_pernet_subsys(&vlan_net_ops);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700640 if (err < 0)
641 goto err0;
642
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800643 err = register_netdevice_notifier(&vlan_notifier_block);
644 if (err < 0)
645 goto err2;
646
Patrick McHardy70c03b42008-07-05 21:26:57 -0700647 err = vlan_gvrp_init();
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800648 if (err < 0)
649 goto err3;
650
Patrick McHardy70c03b42008-07-05 21:26:57 -0700651 err = vlan_netlink_init();
652 if (err < 0)
653 goto err4;
654
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800655 vlan_ioctl_set(vlan_ioctl_handler);
656 return 0;
657
Patrick McHardy70c03b42008-07-05 21:26:57 -0700658err4:
659 vlan_gvrp_uninit();
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800660err3:
661 unregister_netdevice_notifier(&vlan_notifier_block);
662err2:
Eric W. Biederman91e2ff32009-12-02 13:19:08 +0000663 unregister_pernet_subsys(&vlan_net_ops);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700664err0:
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800665 return err;
666}
667
668static void __exit vlan_cleanup_module(void)
669{
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800670 vlan_ioctl_set(NULL);
671 vlan_netlink_fini();
672
673 unregister_netdevice_notifier(&vlan_notifier_block);
674
Eric W. Biederman91e2ff32009-12-02 13:19:08 +0000675 unregister_pernet_subsys(&vlan_net_ops);
Jesper Dangaard Brouer6e327c12009-06-08 03:11:28 +0000676 rcu_barrier(); /* Wait for completion of call_rcu()'s */
Patrick McHardy70c03b42008-07-05 21:26:57 -0700677
678 vlan_gvrp_uninit();
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800679}
680
681module_init(vlan_proto_init);
682module_exit(vlan_cleanup_module);
683
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684MODULE_LICENSE("GPL");
685MODULE_VERSION(DRV_VERSION);