blob: 175273f38cb1bd59f5aeb88cb8c815033475dfe8 [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 McHardy1fd9b1f2013-04-19 02:04:29 +000054static int vlan_group_prealloc_vid(struct vlan_group *vg,
55 __be16 vlan_proto, u16 vlan_id)
Pavel Emelyanov67727182008-03-26 16:27:22 -070056{
57 struct net_device **array;
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +000058 unsigned int pidx, vidx;
Pavel Emelyanov67727182008-03-26 16:27:22 -070059 unsigned int size;
60
61 ASSERT_RTNL();
62
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +000063 pidx = vlan_proto_idx(vlan_proto);
64 vidx = vlan_id / VLAN_GROUP_ARRAY_PART_LEN;
65 array = vg->vlan_devices_arrays[pidx][vidx];
Pavel Emelyanov67727182008-03-26 16:27:22 -070066 if (array != NULL)
67 return 0;
68
69 size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN;
70 array = kzalloc(size, GFP_KERNEL);
71 if (array == NULL)
72 return -ENOBUFS;
73
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +000074 vg->vlan_devices_arrays[pidx][vidx] = array;
Pavel Emelyanov67727182008-03-26 16:27:22 -070075 return 0;
Patrick McHardy42429aa2007-06-13 12:05:59 -070076}
77
Eric Dumazet23289a32009-10-27 07:06:36 +000078void unregister_vlan_dev(struct net_device *dev, struct list_head *head)
Linus Torvalds1da177e2005-04-16 15:20:36 -070079{
Jiri Pirko7da82c02011-12-08 04:11:15 +000080 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
Patrick McHardyaf301512008-01-21 00:25:50 -080081 struct net_device *real_dev = vlan->real_dev;
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +000082 struct vlan_info *vlan_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 struct vlan_group *grp;
Patrick McHardy9bb85822008-07-08 03:24:44 -070084 u16 vlan_id = vlan->vlan_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -070085
86 ASSERT_RTNL();
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +000088 vlan_info = rtnl_dereference(real_dev->vlan_info);
89 BUG_ON(!vlan_info);
90
91 grp = &vlan_info->grp;
Patrick McHardyacc5efb2008-01-21 00:25:31 -080092
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +000093 grp->nr_vlan_devs--;
Patrick McHardyaf301512008-01-21 00:25:50 -080094
David Ward86fbe9b2013-02-08 17:17:07 +000095 if (vlan->flags & VLAN_FLAG_MVRP)
96 vlan_mvrp_request_leave(dev);
Eric Dumazet55aee102011-05-10 12:22:54 -070097 if (vlan->flags & VLAN_FLAG_GVRP)
98 vlan_gvrp_request_leave(dev);
99
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000100 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL);
Veaceslav Falico47701a32013-09-25 09:20:30 +0200101
102 netdev_upper_dev_unlink(real_dev, dev);
Eric Dumazet48752e12011-05-09 04:40:44 +0000103 /* Because unregister_netdevice_queue() makes sure at least one rcu
104 * grace period is respected before device freeing,
105 * we dont need to call synchronize_net() here.
106 */
Eric Dumazet23289a32009-10-27 07:06:36 +0000107 unregister_netdevice_queue(dev, head);
Patrick McHardyce305002008-07-05 21:26:41 -0700108
David Ward86fbe9b2013-02-08 17:17:07 +0000109 if (grp->nr_vlan_devs == 0) {
110 vlan_mvrp_uninit_applicant(real_dev);
Patrick McHardy70c03b42008-07-05 21:26:57 -0700111 vlan_gvrp_uninit_applicant(real_dev);
David Ward86fbe9b2013-02-08 17:17:07 +0000112 }
Patrick McHardy70c03b42008-07-05 21:26:57 -0700113
Cong Wang4a7df342013-03-22 19:14:07 +0000114 /* Take it out of our own structures, but be sure to interlock with
115 * HW accelerating devices or SW vlan input packet processing if
116 * VLAN is not 0 (leave it there for 802.1p).
117 */
118 if (vlan_id)
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000119 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id);
Cong Wang4a7df342013-03-22 19:14:07 +0000120
Patrick McHardyaf301512008-01-21 00:25:50 -0800121 /* Get rid of the vlan's reference to real_dev */
122 dev_put(real_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123}
124
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000125int vlan_check_real_dev(struct net_device *real_dev,
126 __be16 protocol, u16 vlan_id)
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700127{
Stephen Hemminger656299f2008-11-19 21:53:47 -0800128 const char *name = real_dev->name;
Patrick McHardy40f98e12008-01-21 00:24:30 -0800129
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700130 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
Joe Perchesafab2d22011-05-26 10:58:31 +0000131 pr_info("VLANs not supported on %s\n", name);
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700132 return -EOPNOTSUPP;
133 }
134
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000135 if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL)
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700136 return -EEXIST;
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700137
138 return 0;
139}
140
Patrick McHardy07b5b172007-06-13 12:07:54 -0700141int register_vlan_dev(struct net_device *dev)
Patrick McHardye89fe422007-06-13 12:06:29 -0700142{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000143 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
Patrick McHardye89fe422007-06-13 12:06:29 -0700144 struct net_device *real_dev = vlan->real_dev;
Patrick McHardy9bb85822008-07-08 03:24:44 -0700145 u16 vlan_id = vlan->vlan_id;
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000146 struct vlan_info *vlan_info;
147 struct vlan_group *grp;
Patrick McHardye89fe422007-06-13 12:06:29 -0700148 int err;
149
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000150 err = vlan_vid_add(real_dev, vlan->vlan_proto, vlan_id);
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000151 if (err)
152 return err;
153
154 vlan_info = rtnl_dereference(real_dev->vlan_info);
155 /* vlan_info should be there now. vlan_vid_add took care of it */
156 BUG_ON(!vlan_info);
157
158 grp = &vlan_info->grp;
159 if (grp->nr_vlan_devs == 0) {
Patrick McHardy70c03b42008-07-05 21:26:57 -0700160 err = vlan_gvrp_init_applicant(real_dev);
161 if (err < 0)
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000162 goto out_vid_del;
David Ward86fbe9b2013-02-08 17:17:07 +0000163 err = vlan_mvrp_init_applicant(real_dev);
164 if (err < 0)
165 goto out_uninit_gvrp;
Patrick McHardye89fe422007-06-13 12:06:29 -0700166 }
167
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000168 err = vlan_group_prealloc_vid(grp, vlan->vlan_proto, vlan_id);
Pavel Emelyanov67727182008-03-26 16:27:22 -0700169 if (err < 0)
David Ward86fbe9b2013-02-08 17:17:07 +0000170 goto out_uninit_mvrp;
Pavel Emelyanov67727182008-03-26 16:27:22 -0700171
Patrick McHardye89fe422007-06-13 12:06:29 -0700172 err = register_netdevice(dev);
173 if (err < 0)
Veaceslav Falico5df27e62013-09-25 09:20:29 +0200174 goto out_uninit_mvrp;
175
176 err = netdev_upper_dev_link(real_dev, dev);
177 if (err)
178 goto out_unregister_netdev;
Patrick McHardye89fe422007-06-13 12:06:29 -0700179
Jiri Pirko7da82c02011-12-08 04:11:15 +0000180 /* Account for reference in struct vlan_dev_priv */
Patrick McHardye89fe422007-06-13 12:06:29 -0700181 dev_hold(real_dev);
182
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800183 netif_stacked_transfer_operstate(real_dev, dev);
Patrick McHardye89fe422007-06-13 12:06:29 -0700184 linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
185
186 /* So, got the sucker initialized, now lets place
187 * it into our local structure.
188 */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000189 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev);
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000190 grp->nr_vlan_devs++;
Patrick McHardye89fe422007-06-13 12:06:29 -0700191
Patrick McHardye89fe422007-06-13 12:06:29 -0700192 return 0;
193
Veaceslav Falico5df27e62013-09-25 09:20:29 +0200194out_unregister_netdev:
195 unregister_netdevice(dev);
David Ward86fbe9b2013-02-08 17:17:07 +0000196out_uninit_mvrp:
197 if (grp->nr_vlan_devs == 0)
198 vlan_mvrp_uninit_applicant(real_dev);
199out_uninit_gvrp:
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000200 if (grp->nr_vlan_devs == 0)
Patrick McHardy70c03b42008-07-05 21:26:57 -0700201 vlan_gvrp_uninit_applicant(real_dev);
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000202out_vid_del:
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000203 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id);
Patrick McHardye89fe422007-06-13 12:06:29 -0700204 return err;
205}
206
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207/* Attach a VLAN device to a mac address (ie Ethernet Card).
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700208 * Returns 0 if the device was created or a negative error code otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 */
Patrick McHardy9bb85822008-07-08 03:24:44 -0700210static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 struct net_device *new_dev;
Wang Sheng-Hui0c0667a2013-08-03 16:54:50 +0800213 struct vlan_dev_priv *vlan;
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700214 struct net *net = dev_net(real_dev);
215 struct vlan_net *vn = net_generic(net, vlan_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 char name[IFNAMSIZ];
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700217 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218
Patrick McHardy9bb85822008-07-08 03:24:44 -0700219 if (vlan_id >= VLAN_VID_MASK)
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700220 return -ERANGE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000222 err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id);
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700223 if (err < 0)
224 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
226 /* Gotta set up the fields for the device. */
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700227 switch (vn->name_type) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 case VLAN_NAME_TYPE_RAW_PLUS_VID:
229 /* name will look like: eth1.0005 */
Patrick McHardy9bb85822008-07-08 03:24:44 -0700230 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 break;
232 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
233 /* Put our vlan.VID in the name.
234 * Name will look like: vlan5
235 */
Patrick McHardy9bb85822008-07-08 03:24:44 -0700236 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 break;
238 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
239 /* Put our vlan.VID in the name.
240 * Name will look like: eth0.5
241 */
Patrick McHardy9bb85822008-07-08 03:24:44 -0700242 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 break;
244 case VLAN_NAME_TYPE_PLUS_VID:
245 /* Put our vlan.VID in the name.
246 * Name will look like: vlan0005
247 */
248 default:
Patrick McHardy9bb85822008-07-08 03:24:44 -0700249 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700250 }
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900251
Jiri Pirko7da82c02011-12-08 04:11:15 +0000252 new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, vlan_setup);
Arjan van de Ven5dd8d1e2006-07-03 00:25:33 -0700253
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 if (new_dev == NULL)
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700255 return -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256
Pavel Emelyanov65d292a2008-04-16 00:55:06 -0700257 dev_net_set(new_dev, net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 /* need 4 bytes for extra VLAN header info,
259 * hope the underlying device can handle it.
260 */
261 new_dev->mtu = real_dev->mtu;
Yi Zou6e22ce22012-11-28 13:45:24 +0000262 new_dev->priv_flags |= (real_dev->priv_flags & IFF_UNICAST_FLT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263
Wang Sheng-Hui0c0667a2013-08-03 16:54:50 +0800264 vlan = vlan_dev_priv(new_dev);
265 vlan->vlan_proto = htons(ETH_P_8021Q);
266 vlan->vlan_id = vlan_id;
267 vlan->real_dev = real_dev;
268 vlan->dent = NULL;
269 vlan->flags = VLAN_FLAG_REORDER_HDR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270
Patrick McHardy07b5b172007-06-13 12:07:54 -0700271 new_dev->rtnl_link_ops = &vlan_link_ops;
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700272 err = register_vlan_dev(new_dev);
273 if (err < 0)
Patrick McHardye89fe422007-06-13 12:06:29 -0700274 goto out_free_newdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700276 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278out_free_newdev:
279 free_netdev(new_dev);
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700280 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281}
282
Patrick McHardy8c979c22007-07-11 19:45:24 -0700283static void vlan_sync_address(struct net_device *dev,
284 struct net_device *vlandev)
285{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000286 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700287
288 /* May be called without an actual change */
Joe Perches53a2b3a2012-05-08 18:56:47 +0000289 if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr))
Patrick McHardy8c979c22007-07-11 19:45:24 -0700290 return;
291
292 /* vlan address was different from the old address and is equal to
293 * the new address */
Joe Perches53a2b3a2012-05-08 18:56:47 +0000294 if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
295 ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000296 dev_uc_del(dev, vlandev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700297
298 /* vlan address was equal to the old address and is different from
299 * the new address */
Joe Perches53a2b3a2012-05-08 18:56:47 +0000300 if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
301 !ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000302 dev_uc_add(dev, vlandev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700303
Joe Perches07fc67b2014-01-20 09:52:14 -0800304 ether_addr_copy(vlan->real_dev_addr, dev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700305}
306
Patrick McHardy5fb13572008-05-20 14:54:50 -0700307static void vlan_transfer_features(struct net_device *dev,
308 struct net_device *vlandev)
309{
Vlad Yasevichfc0d48b2014-03-26 11:47:56 -0400310 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
311
Alexander Duyck1ae4be22008-09-11 20:17:05 -0700312 vlandev->gso_max_size = dev->gso_max_size;
John Fastabend029f5fc2010-10-30 14:22:32 +0000313
Vlad Yasevichfc0d48b2014-03-26 11:47:56 -0400314 if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto))
John Fastabend029f5fc2010-10-30 14:22:32 +0000315 vlandev->hard_header_len = dev->hard_header_len;
316 else
317 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
318
Amerigo Wangf4d53922012-10-29 17:22:28 +0000319#if IS_ENABLED(CONFIG_FCOE)
Vasu Devb85daa52009-08-14 12:41:07 +0000320 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
321#endif
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700322
323 netdev_update_features(vlandev);
Patrick McHardy5fb13572008-05-20 14:54:50 -0700324}
325
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700326static void __vlan_device_event(struct net_device *dev, unsigned long event)
327{
328 switch (event) {
329 case NETDEV_CHANGENAME:
330 vlan_proc_rem_dev(dev);
331 if (vlan_proc_add_dev(dev) < 0)
Joe Perchesafab2d22011-05-26 10:58:31 +0000332 pr_warn("failed to change proc name for %s\n",
333 dev->name);
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700334 break;
Pavel Emelyanov30688a92008-04-16 00:57:01 -0700335 case NETDEV_REGISTER:
336 if (vlan_proc_add_dev(dev) < 0)
Joe Perchesafab2d22011-05-26 10:58:31 +0000337 pr_warn("failed to add proc entry for %s\n", dev->name);
Pavel Emelyanov30688a92008-04-16 00:57:01 -0700338 break;
339 case NETDEV_UNREGISTER:
340 vlan_proc_rem_dev(dev);
341 break;
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700342 }
343}
344
Patrick McHardy2029cc22008-01-21 00:26:41 -0800345static int vlan_device_event(struct notifier_block *unused, unsigned long event,
346 void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347{
Jiri Pirko351638e2013-05-28 01:30:21 +0000348 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700349 struct vlan_group *grp;
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000350 struct vlan_info *vlan_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 int i, flgs;
352 struct net_device *vlandev;
Jiri Pirko7da82c02011-12-08 04:11:15 +0000353 struct vlan_dev_priv *vlan;
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000354 bool last = false;
Patrick McHardy29906f62009-10-29 23:43:00 -0700355 LIST_HEAD(list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356
Patrick McHardy81d85342008-05-20 14:37:36 -0700357 if (is_vlan_dev(dev))
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700358 __vlan_device_event(dev, event);
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700359
Pedro Garciaad1afb02010-07-18 15:38:44 -0700360 if ((event == NETDEV_UP) &&
Patrick McHardyf6469682013-04-19 02:04:27 +0000361 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) {
Joe Perchesafab2d22011-05-26 10:58:31 +0000362 pr_info("adding VLAN 0 to HW filter on device %s\n",
Pedro Garciaad1afb02010-07-18 15:38:44 -0700363 dev->name);
Patrick McHardy80d5c362013-04-19 02:04:28 +0000364 vlan_vid_add(dev, htons(ETH_P_8021Q), 0);
Pedro Garciaad1afb02010-07-18 15:38:44 -0700365 }
366
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000367 vlan_info = rtnl_dereference(dev->vlan_info);
368 if (!vlan_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 goto out;
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000370 grp = &vlan_info->grp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
372 /* It is OK that we do not hold the group lock right now,
373 * as we run under the RTNL lock.
374 */
375
376 switch (event) {
377 case NETDEV_CHANGE:
378 /* Propagate real device state to vlan devices */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000379 vlan_group_for_each_dev(grp, i, vlandev)
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800380 netif_stacked_transfer_operstate(dev, vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 break;
382
Patrick McHardy8c979c22007-07-11 19:45:24 -0700383 case NETDEV_CHANGEADDR:
384 /* Adjust unicast filters on underlying device */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000385 vlan_group_for_each_dev(grp, i, vlandev) {
Patrick McHardyd932e042007-11-10 21:51:40 -0800386 flgs = vlandev->flags;
387 if (!(flgs & IFF_UP))
388 continue;
389
Patrick McHardy8c979c22007-07-11 19:45:24 -0700390 vlan_sync_address(dev, vlandev);
391 }
392 break;
393
Herbert Xu2e477c92009-07-20 07:35:37 -0700394 case NETDEV_CHANGEMTU:
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000395 vlan_group_for_each_dev(grp, i, vlandev) {
Herbert Xu2e477c92009-07-20 07:35:37 -0700396 if (vlandev->mtu <= dev->mtu)
397 continue;
398
399 dev_set_mtu(vlandev, dev->mtu);
400 }
401 break;
402
Patrick McHardy5fb13572008-05-20 14:54:50 -0700403 case NETDEV_FEAT_CHANGE:
404 /* Propagate device features to underlying device */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000405 vlan_group_for_each_dev(grp, i, vlandev)
Patrick McHardy5fb13572008-05-20 14:54:50 -0700406 vlan_transfer_features(dev, vlandev);
Patrick McHardy5fb13572008-05-20 14:54:50 -0700407 break;
408
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 case NETDEV_DOWN:
Patrick McHardyf6469682013-04-19 02:04:27 +0000410 if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)
Patrick McHardy80d5c362013-04-19 02:04:28 +0000411 vlan_vid_del(dev, htons(ETH_P_8021Q), 0);
Amir Hananiaefc73f42012-07-09 20:47:19 +0000412
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 /* Put all VLANs for this dev in the down state too. */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000414 vlan_group_for_each_dev(grp, i, vlandev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 flgs = vlandev->flags;
416 if (!(flgs & IFF_UP))
417 continue;
418
Jiri Pirko7da82c02011-12-08 04:11:15 +0000419 vlan = vlan_dev_priv(vlandev);
Patrick McHardy5e756592009-11-25 07:54:54 +0000420 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
421 dev_change_flags(vlandev, flgs & ~IFF_UP);
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800422 netif_stacked_transfer_operstate(dev, vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 }
424 break;
425
426 case NETDEV_UP:
427 /* Put all VLANs for this dev in the up state too. */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000428 vlan_group_for_each_dev(grp, i, vlandev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 flgs = vlandev->flags;
430 if (flgs & IFF_UP)
431 continue;
432
Jiri Pirko7da82c02011-12-08 04:11:15 +0000433 vlan = vlan_dev_priv(vlandev);
Patrick McHardy5e756592009-11-25 07:54:54 +0000434 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
435 dev_change_flags(vlandev, flgs | IFF_UP);
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800436 netif_stacked_transfer_operstate(dev, vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 }
438 break;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900439
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 case NETDEV_UNREGISTER:
David Lamparter3b27e102010-09-17 03:22:19 +0000441 /* twiddle thumbs on netns device moves */
442 if (dev->reg_state != NETREG_UNREGISTERING)
443 break;
444
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000445 vlan_group_for_each_dev(grp, i, vlandev) {
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000446 /* removal of last vid destroys vlan_info, abort
Patrick McHardy29906f62009-10-29 23:43:00 -0700447 * afterwards */
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000448 if (vlan_info->nr_vids == 1)
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000449 last = true;
Patrick McHardy29906f62009-10-29 23:43:00 -0700450
451 unregister_vlan_dev(vlandev, &list);
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000452 if (last)
453 break;
Patrick McHardy29906f62009-10-29 23:43:00 -0700454 }
455 unregister_netdevice_many(&list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 break;
Jiri Pirko1c01fe12010-03-10 10:30:19 +0000457
458 case NETDEV_PRE_TYPE_CHANGE:
459 /* Forbid underlaying device to change its type. */
Jiri Pirko18c22a02012-10-17 01:37:36 +0000460 if (vlan_uses_dev(dev))
461 return NOTIFY_BAD;
462 break;
Ben Hutchings99606472011-04-15 13:46:49 +0000463
464 case NETDEV_NOTIFY_PEERS:
Ben Hutchings7c899432011-04-15 13:47:51 +0000465 case NETDEV_BONDING_FAILOVER:
Jiri Pirko4aa5dee2013-07-20 12:13:53 +0200466 case NETDEV_RESEND_IGMP:
Ben Hutchings99606472011-04-15 13:46:49 +0000467 /* Propagate to vlan devices */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000468 vlan_group_for_each_dev(grp, i, vlandev)
Ben Hutchings7c899432011-04-15 13:47:51 +0000469 call_netdevice_notifiers(event, vlandev);
Ben Hutchings99606472011-04-15 13:46:49 +0000470 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700471 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
473out:
474 return NOTIFY_DONE;
475}
476
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800477static struct notifier_block vlan_notifier_block __read_mostly = {
478 .notifier_call = vlan_device_event,
479};
480
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481/*
482 * VLAN IOCTL handler.
483 * o execute requested action or pass command to the device driver
484 * arg is really a struct vlan_ioctl_args __user *.
485 */
Eric W. Biederman881d9662007-09-17 11:56:21 -0700486static int vlan_ioctl_handler(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487{
Patrick McHardyc17d8872007-06-13 12:05:22 -0700488 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 struct vlan_ioctl_args args;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700490 struct net_device *dev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491
492 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
493 return -EFAULT;
494
495 /* Null terminate this sucker, just in case. */
496 args.device1[23] = 0;
497 args.u.device2[23] = 0;
498
Patrick McHardyc17d8872007-06-13 12:05:22 -0700499 rtnl_lock();
500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 switch (args.cmd) {
502 case SET_VLAN_INGRESS_PRIORITY_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700503 case SET_VLAN_EGRESS_PRIORITY_CMD:
504 case SET_VLAN_FLAG_CMD:
505 case ADD_VLAN_CMD:
506 case DEL_VLAN_CMD:
507 case GET_VLAN_REALDEV_NAME_CMD:
508 case GET_VLAN_VID_CMD:
509 err = -ENODEV;
Pavel Emelyanov65d292a2008-04-16 00:55:06 -0700510 dev = __dev_get_by_name(net, args.device1);
Patrick McHardyc17d8872007-06-13 12:05:22 -0700511 if (!dev)
512 goto out;
513
514 err = -EINVAL;
Joonwoo Park26a25232008-07-08 03:22:16 -0700515 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700516 goto out;
517 }
518
519 switch (args.cmd) {
520 case SET_VLAN_INGRESS_PRIORITY_CMD:
521 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000522 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700523 break;
524 vlan_dev_set_ingress_priority(dev,
525 args.u.skb_priority,
526 args.vlan_qos);
Patrick McHardyfffe4702007-11-07 01:31:32 -0800527 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 break;
529
530 case SET_VLAN_EGRESS_PRIORITY_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700531 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000532 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700533 break;
534 err = vlan_dev_set_egress_priority(dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 args.u.skb_priority,
536 args.vlan_qos);
537 break;
538
539 case SET_VLAN_FLAG_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700540 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000541 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700542 break;
Patrick McHardyb3ce0322008-07-05 21:26:27 -0700543 err = vlan_dev_change_flags(dev,
544 args.vlan_qos ? args.u.flag : 0,
545 args.u.flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 break;
547
548 case SET_VLAN_NAME_TYPE_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700549 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000550 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Pavel Emelyanove35de022007-12-06 22:52:16 -0800551 break;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700552 if ((args.u.name_type >= 0) &&
553 (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700554 struct vlan_net *vn;
555
556 vn = net_generic(net, vlan_net_id);
557 vn->name_type = args.u.name_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 err = 0;
559 } else {
560 err = -EINVAL;
561 }
562 break;
563
564 case ADD_VLAN_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700565 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000566 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700567 break;
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700568 err = register_vlan_device(dev, args.u.VID);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 break;
570
571 case DEL_VLAN_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700572 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000573 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700574 break;
Eric Dumazet23289a32009-10-27 07:06:36 +0000575 unregister_vlan_dev(dev, NULL);
Patrick McHardyaf301512008-01-21 00:25:50 -0800576 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 break;
578
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 case GET_VLAN_REALDEV_NAME_CMD:
Andrew Morton3f5f4342007-07-24 15:37:11 -0700580 err = 0;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700581 vlan_dev_get_realdev_name(dev, args.u.device2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 if (copy_to_user(arg, &args,
Patrick McHardy2029cc22008-01-21 00:26:41 -0800583 sizeof(struct vlan_ioctl_args)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 break;
586
587 case GET_VLAN_VID_CMD:
Andrew Morton3f5f4342007-07-24 15:37:11 -0700588 err = 0;
Patrick McHardy22d1ba72008-07-08 03:23:57 -0700589 args.u.VID = vlan_dev_vlan_id(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 if (copy_to_user(arg, &args,
Patrick McHardy2029cc22008-01-21 00:26:41 -0800591 sizeof(struct vlan_ioctl_args)))
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900592 err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 break;
594
595 default:
Patrick McHardy198a2912008-01-21 00:24:59 -0800596 err = -EOPNOTSUPP;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700597 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700598 }
Mika Kukkonen7eb1b3d2005-12-21 18:39:49 -0800599out:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700600 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 return err;
602}
603
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000604static int __net_init vlan_init_net(struct net *net)
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700605{
Eric W. Biederman946d1a92009-11-29 15:46:05 +0000606 struct vlan_net *vn = net_generic(net, vlan_net_id);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700607 int err;
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700608
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700609 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
610
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700611 err = vlan_proc_init(net);
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700612
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700613 return err;
614}
615
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000616static void __net_exit vlan_exit_net(struct net *net)
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700617{
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700618 vlan_proc_cleanup(net);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700619}
620
621static struct pernet_operations vlan_net_ops = {
622 .init = vlan_init_net,
623 .exit = vlan_exit_net,
Eric W. Biederman946d1a92009-11-29 15:46:05 +0000624 .id = &vlan_net_id,
625 .size = sizeof(struct vlan_net),
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700626};
627
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800628static int __init vlan_proto_init(void)
629{
630 int err;
631
Justin Mattockda7c06c2011-05-23 20:43:48 +0000632 pr_info("%s v%s\n", vlan_fullname, vlan_version);
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800633
Eric W. Biederman91e2ff32009-12-02 13:19:08 +0000634 err = register_pernet_subsys(&vlan_net_ops);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700635 if (err < 0)
636 goto err0;
637
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800638 err = register_netdevice_notifier(&vlan_notifier_block);
639 if (err < 0)
640 goto err2;
641
Patrick McHardy70c03b42008-07-05 21:26:57 -0700642 err = vlan_gvrp_init();
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800643 if (err < 0)
644 goto err3;
645
David Ward86fbe9b2013-02-08 17:17:07 +0000646 err = vlan_mvrp_init();
Patrick McHardy70c03b42008-07-05 21:26:57 -0700647 if (err < 0)
648 goto err4;
649
David Ward86fbe9b2013-02-08 17:17:07 +0000650 err = vlan_netlink_init();
651 if (err < 0)
652 goto err5;
653
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800654 vlan_ioctl_set(vlan_ioctl_handler);
655 return 0;
656
David Ward86fbe9b2013-02-08 17:17:07 +0000657err5:
658 vlan_mvrp_uninit();
Patrick McHardy70c03b42008-07-05 21:26:57 -0700659err4:
660 vlan_gvrp_uninit();
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800661err3:
662 unregister_netdevice_notifier(&vlan_notifier_block);
663err2:
Eric W. Biederman91e2ff32009-12-02 13:19:08 +0000664 unregister_pernet_subsys(&vlan_net_ops);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700665err0:
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800666 return err;
667}
668
669static void __exit vlan_cleanup_module(void)
670{
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800671 vlan_ioctl_set(NULL);
672 vlan_netlink_fini();
673
674 unregister_netdevice_notifier(&vlan_notifier_block);
675
Eric W. Biederman91e2ff32009-12-02 13:19:08 +0000676 unregister_pernet_subsys(&vlan_net_ops);
Jesper Dangaard Brouer6e327c12009-06-08 03:11:28 +0000677 rcu_barrier(); /* Wait for completion of call_rcu()'s */
Patrick McHardy70c03b42008-07-05 21:26:57 -0700678
David Ward86fbe9b2013-02-08 17:17:07 +0000679 vlan_mvrp_uninit();
Patrick McHardy70c03b42008-07-05 21:26:57 -0700680 vlan_gvrp_uninit();
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800681}
682
683module_init(vlan_proto_init);
684module_exit(vlan_cleanup_module);
685
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686MODULE_LICENSE("GPL");
687MODULE_VERSION(DRV_VERSION);