blob: d2cd9de4b7241dcc8c1df5fd7832b3b317799923 [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
Vlad Yasevichd38569a2014-05-16 17:04:55 -0400172 vlan->nest_level = dev_get_nest_level(real_dev, is_vlan_dev) + 1;
Patrick McHardye89fe422007-06-13 12:06:29 -0700173 err = register_netdevice(dev);
174 if (err < 0)
Veaceslav Falico5df27e62013-09-25 09:20:29 +0200175 goto out_uninit_mvrp;
176
177 err = netdev_upper_dev_link(real_dev, dev);
178 if (err)
179 goto out_unregister_netdev;
Patrick McHardye89fe422007-06-13 12:06:29 -0700180
Jiri Pirko7da82c02011-12-08 04:11:15 +0000181 /* Account for reference in struct vlan_dev_priv */
Patrick McHardye89fe422007-06-13 12:06:29 -0700182 dev_hold(real_dev);
183
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800184 netif_stacked_transfer_operstate(real_dev, dev);
Patrick McHardye89fe422007-06-13 12:06:29 -0700185 linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
186
187 /* So, got the sucker initialized, now lets place
188 * it into our local structure.
189 */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000190 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev);
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000191 grp->nr_vlan_devs++;
Patrick McHardye89fe422007-06-13 12:06:29 -0700192
Patrick McHardye89fe422007-06-13 12:06:29 -0700193 return 0;
194
Veaceslav Falico5df27e62013-09-25 09:20:29 +0200195out_unregister_netdev:
196 unregister_netdevice(dev);
David Ward86fbe9b2013-02-08 17:17:07 +0000197out_uninit_mvrp:
198 if (grp->nr_vlan_devs == 0)
199 vlan_mvrp_uninit_applicant(real_dev);
200out_uninit_gvrp:
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000201 if (grp->nr_vlan_devs == 0)
Patrick McHardy70c03b42008-07-05 21:26:57 -0700202 vlan_gvrp_uninit_applicant(real_dev);
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000203out_vid_del:
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000204 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id);
Patrick McHardye89fe422007-06-13 12:06:29 -0700205 return err;
206}
207
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208/* Attach a VLAN device to a mac address (ie Ethernet Card).
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700209 * Returns 0 if the device was created or a negative error code otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 */
Patrick McHardy9bb85822008-07-08 03:24:44 -0700211static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 struct net_device *new_dev;
Wang Sheng-Hui0c0667a2013-08-03 16:54:50 +0800214 struct vlan_dev_priv *vlan;
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700215 struct net *net = dev_net(real_dev);
216 struct vlan_net *vn = net_generic(net, vlan_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 char name[IFNAMSIZ];
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700218 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219
Patrick McHardy9bb85822008-07-08 03:24:44 -0700220 if (vlan_id >= VLAN_VID_MASK)
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700221 return -ERANGE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000223 err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id);
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700224 if (err < 0)
225 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
227 /* Gotta set up the fields for the device. */
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700228 switch (vn->name_type) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 case VLAN_NAME_TYPE_RAW_PLUS_VID:
230 /* name will look like: eth1.0005 */
Patrick McHardy9bb85822008-07-08 03:24:44 -0700231 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 break;
233 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
234 /* Put our vlan.VID in the name.
235 * Name will look like: vlan5
236 */
Patrick McHardy9bb85822008-07-08 03:24:44 -0700237 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 break;
239 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
240 /* Put our vlan.VID in the name.
241 * Name will look like: eth0.5
242 */
Patrick McHardy9bb85822008-07-08 03:24:44 -0700243 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 break;
245 case VLAN_NAME_TYPE_PLUS_VID:
246 /* Put our vlan.VID in the name.
247 * Name will look like: vlan0005
248 */
249 default:
Patrick McHardy9bb85822008-07-08 03:24:44 -0700250 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700251 }
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900252
Tom Gundersenc835a672014-07-14 16:37:24 +0200253 new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name,
254 NET_NAME_UNKNOWN, vlan_setup);
Arjan van de Ven5dd8d1e2006-07-03 00:25:33 -0700255
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 if (new_dev == NULL)
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700257 return -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258
Pavel Emelyanov65d292a2008-04-16 00:55:06 -0700259 dev_net_set(new_dev, net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 /* need 4 bytes for extra VLAN header info,
261 * hope the underlying device can handle it.
262 */
263 new_dev->mtu = real_dev->mtu;
Yi Zou6e22ce22012-11-28 13:45:24 +0000264 new_dev->priv_flags |= (real_dev->priv_flags & IFF_UNICAST_FLT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265
Wang Sheng-Hui0c0667a2013-08-03 16:54:50 +0800266 vlan = vlan_dev_priv(new_dev);
267 vlan->vlan_proto = htons(ETH_P_8021Q);
268 vlan->vlan_id = vlan_id;
269 vlan->real_dev = real_dev;
270 vlan->dent = NULL;
271 vlan->flags = VLAN_FLAG_REORDER_HDR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
Patrick McHardy07b5b172007-06-13 12:07:54 -0700273 new_dev->rtnl_link_ops = &vlan_link_ops;
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700274 err = register_vlan_dev(new_dev);
275 if (err < 0)
Patrick McHardye89fe422007-06-13 12:06:29 -0700276 goto out_free_newdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700278 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280out_free_newdev:
281 free_netdev(new_dev);
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700282 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283}
284
Patrick McHardy8c979c22007-07-11 19:45:24 -0700285static void vlan_sync_address(struct net_device *dev,
286 struct net_device *vlandev)
287{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000288 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700289
290 /* May be called without an actual change */
Joe Perches53a2b3a2012-05-08 18:56:47 +0000291 if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr))
Patrick McHardy8c979c22007-07-11 19:45:24 -0700292 return;
293
294 /* vlan address was different from the old address and is equal to
295 * the new address */
Joe Perches53a2b3a2012-05-08 18:56:47 +0000296 if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
297 ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000298 dev_uc_del(dev, vlandev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700299
300 /* vlan address was equal to the old address and is different from
301 * the new address */
Joe Perches53a2b3a2012-05-08 18:56:47 +0000302 if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
303 !ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000304 dev_uc_add(dev, vlandev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700305
Joe Perches07fc67b2014-01-20 09:52:14 -0800306 ether_addr_copy(vlan->real_dev_addr, dev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700307}
308
Patrick McHardy5fb13572008-05-20 14:54:50 -0700309static void vlan_transfer_features(struct net_device *dev,
310 struct net_device *vlandev)
311{
Vlad Yasevichfc0d48b2014-03-26 11:47:56 -0400312 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
313
Alexander Duyck1ae4be22008-09-11 20:17:05 -0700314 vlandev->gso_max_size = dev->gso_max_size;
John Fastabend029f5fc2010-10-30 14:22:32 +0000315
Vlad Yasevichfc0d48b2014-03-26 11:47:56 -0400316 if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto))
John Fastabend029f5fc2010-10-30 14:22:32 +0000317 vlandev->hard_header_len = dev->hard_header_len;
318 else
319 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
320
Amerigo Wangf4d53922012-10-29 17:22:28 +0000321#if IS_ENABLED(CONFIG_FCOE)
Vasu Devb85daa52009-08-14 12:41:07 +0000322 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
323#endif
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700324
325 netdev_update_features(vlandev);
Patrick McHardy5fb13572008-05-20 14:54:50 -0700326}
327
WANG Cong9c5ff242014-07-25 15:25:10 -0700328static int __vlan_device_event(struct net_device *dev, unsigned long event)
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700329{
WANG Cong9c5ff242014-07-25 15:25:10 -0700330 int err = 0;
331
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700332 switch (event) {
333 case NETDEV_CHANGENAME:
334 vlan_proc_rem_dev(dev);
WANG Cong9c5ff242014-07-25 15:25:10 -0700335 err = vlan_proc_add_dev(dev);
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700336 break;
Pavel Emelyanov30688a92008-04-16 00:57:01 -0700337 case NETDEV_REGISTER:
WANG Cong9c5ff242014-07-25 15:25:10 -0700338 err = vlan_proc_add_dev(dev);
Pavel Emelyanov30688a92008-04-16 00:57:01 -0700339 break;
340 case NETDEV_UNREGISTER:
341 vlan_proc_rem_dev(dev);
342 break;
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700343 }
WANG Cong9c5ff242014-07-25 15:25:10 -0700344
345 return err;
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700346}
347
Patrick McHardy2029cc22008-01-21 00:26:41 -0800348static int vlan_device_event(struct notifier_block *unused, unsigned long event,
349 void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350{
Jiri Pirko351638e2013-05-28 01:30:21 +0000351 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700352 struct vlan_group *grp;
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000353 struct vlan_info *vlan_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 int i, flgs;
355 struct net_device *vlandev;
Jiri Pirko7da82c02011-12-08 04:11:15 +0000356 struct vlan_dev_priv *vlan;
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000357 bool last = false;
Patrick McHardy29906f62009-10-29 23:43:00 -0700358 LIST_HEAD(list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
WANG Cong9c5ff242014-07-25 15:25:10 -0700360 if (is_vlan_dev(dev)) {
361 int err = __vlan_device_event(dev, event);
362
363 if (err)
364 return notifier_from_errno(err);
365 }
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700366
Pedro Garciaad1afb02010-07-18 15:38:44 -0700367 if ((event == NETDEV_UP) &&
Patrick McHardyf6469682013-04-19 02:04:27 +0000368 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) {
Joe Perchesafab2d22011-05-26 10:58:31 +0000369 pr_info("adding VLAN 0 to HW filter on device %s\n",
Pedro Garciaad1afb02010-07-18 15:38:44 -0700370 dev->name);
Patrick McHardy80d5c362013-04-19 02:04:28 +0000371 vlan_vid_add(dev, htons(ETH_P_8021Q), 0);
Pedro Garciaad1afb02010-07-18 15:38:44 -0700372 }
373
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000374 vlan_info = rtnl_dereference(dev->vlan_info);
375 if (!vlan_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 goto out;
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000377 grp = &vlan_info->grp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
379 /* It is OK that we do not hold the group lock right now,
380 * as we run under the RTNL lock.
381 */
382
383 switch (event) {
384 case NETDEV_CHANGE:
385 /* Propagate real device state to vlan devices */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000386 vlan_group_for_each_dev(grp, i, vlandev)
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800387 netif_stacked_transfer_operstate(dev, vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 break;
389
Patrick McHardy8c979c22007-07-11 19:45:24 -0700390 case NETDEV_CHANGEADDR:
391 /* Adjust unicast filters on underlying device */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000392 vlan_group_for_each_dev(grp, i, vlandev) {
Patrick McHardyd932e042007-11-10 21:51:40 -0800393 flgs = vlandev->flags;
394 if (!(flgs & IFF_UP))
395 continue;
396
Patrick McHardy8c979c22007-07-11 19:45:24 -0700397 vlan_sync_address(dev, vlandev);
398 }
399 break;
400
Herbert Xu2e477c92009-07-20 07:35:37 -0700401 case NETDEV_CHANGEMTU:
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000402 vlan_group_for_each_dev(grp, i, vlandev) {
Herbert Xu2e477c92009-07-20 07:35:37 -0700403 if (vlandev->mtu <= dev->mtu)
404 continue;
405
406 dev_set_mtu(vlandev, dev->mtu);
407 }
408 break;
409
Patrick McHardy5fb13572008-05-20 14:54:50 -0700410 case NETDEV_FEAT_CHANGE:
411 /* Propagate device features to underlying device */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000412 vlan_group_for_each_dev(grp, i, vlandev)
Patrick McHardy5fb13572008-05-20 14:54:50 -0700413 vlan_transfer_features(dev, vlandev);
Patrick McHardy5fb13572008-05-20 14:54:50 -0700414 break;
415
David S. Miller99c4a262015-03-18 22:52:33 -0400416 case NETDEV_DOWN: {
417 struct net_device *tmp;
418 LIST_HEAD(close_list);
419
Patrick McHardyf6469682013-04-19 02:04:27 +0000420 if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)
Patrick McHardy80d5c362013-04-19 02:04:28 +0000421 vlan_vid_del(dev, htons(ETH_P_8021Q), 0);
Amir Hananiaefc73f42012-07-09 20:47:19 +0000422
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 /* Put all VLANs for this dev in the down state too. */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000424 vlan_group_for_each_dev(grp, i, vlandev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 flgs = vlandev->flags;
426 if (!(flgs & IFF_UP))
427 continue;
428
Jiri Pirko7da82c02011-12-08 04:11:15 +0000429 vlan = vlan_dev_priv(vlandev);
Patrick McHardy5e756592009-11-25 07:54:54 +0000430 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
David S. Miller99c4a262015-03-18 22:52:33 -0400431 list_add(&vlandev->close_list, &close_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433
David S. Miller99c4a262015-03-18 22:52:33 -0400434 dev_close_many(&close_list, false);
435
436 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) {
437 netif_stacked_transfer_operstate(dev, vlandev);
438 list_del_init(&vlandev->close_list);
439 }
440 list_del(&close_list);
441 break;
442 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 case NETDEV_UP:
444 /* Put all VLANs for this dev in the up state too. */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000445 vlan_group_for_each_dev(grp, i, vlandev) {
Vlad Yasevichbe346ff2015-05-12 20:53:14 -0400446 flgs = dev_get_flags(vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 if (flgs & IFF_UP)
448 continue;
449
Jiri Pirko7da82c02011-12-08 04:11:15 +0000450 vlan = vlan_dev_priv(vlandev);
Patrick McHardy5e756592009-11-25 07:54:54 +0000451 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
452 dev_change_flags(vlandev, flgs | IFF_UP);
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800453 netif_stacked_transfer_operstate(dev, vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 }
455 break;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900456
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 case NETDEV_UNREGISTER:
David Lamparter3b27e102010-09-17 03:22:19 +0000458 /* twiddle thumbs on netns device moves */
459 if (dev->reg_state != NETREG_UNREGISTERING)
460 break;
461
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000462 vlan_group_for_each_dev(grp, i, vlandev) {
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000463 /* removal of last vid destroys vlan_info, abort
Patrick McHardy29906f62009-10-29 23:43:00 -0700464 * afterwards */
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000465 if (vlan_info->nr_vids == 1)
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000466 last = true;
Patrick McHardy29906f62009-10-29 23:43:00 -0700467
468 unregister_vlan_dev(vlandev, &list);
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000469 if (last)
470 break;
Patrick McHardy29906f62009-10-29 23:43:00 -0700471 }
472 unregister_netdevice_many(&list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 break;
Jiri Pirko1c01fe12010-03-10 10:30:19 +0000474
475 case NETDEV_PRE_TYPE_CHANGE:
476 /* Forbid underlaying device to change its type. */
Jiri Pirko18c22a02012-10-17 01:37:36 +0000477 if (vlan_uses_dev(dev))
478 return NOTIFY_BAD;
479 break;
Ben Hutchings99606472011-04-15 13:46:49 +0000480
481 case NETDEV_NOTIFY_PEERS:
Ben Hutchings7c899432011-04-15 13:47:51 +0000482 case NETDEV_BONDING_FAILOVER:
Jiri Pirko4aa5dee2013-07-20 12:13:53 +0200483 case NETDEV_RESEND_IGMP:
Ben Hutchings99606472011-04-15 13:46:49 +0000484 /* Propagate to vlan devices */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000485 vlan_group_for_each_dev(grp, i, vlandev)
Ben Hutchings7c899432011-04-15 13:47:51 +0000486 call_netdevice_notifiers(event, vlandev);
Ben Hutchings99606472011-04-15 13:46:49 +0000487 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700488 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489
490out:
491 return NOTIFY_DONE;
492}
493
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800494static struct notifier_block vlan_notifier_block __read_mostly = {
495 .notifier_call = vlan_device_event,
496};
497
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498/*
499 * VLAN IOCTL handler.
500 * o execute requested action or pass command to the device driver
501 * arg is really a struct vlan_ioctl_args __user *.
502 */
Eric W. Biederman881d9662007-09-17 11:56:21 -0700503static int vlan_ioctl_handler(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504{
Patrick McHardyc17d8872007-06-13 12:05:22 -0700505 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 struct vlan_ioctl_args args;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700507 struct net_device *dev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508
509 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
510 return -EFAULT;
511
512 /* Null terminate this sucker, just in case. */
513 args.device1[23] = 0;
514 args.u.device2[23] = 0;
515
Patrick McHardyc17d8872007-06-13 12:05:22 -0700516 rtnl_lock();
517
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 switch (args.cmd) {
519 case SET_VLAN_INGRESS_PRIORITY_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700520 case SET_VLAN_EGRESS_PRIORITY_CMD:
521 case SET_VLAN_FLAG_CMD:
522 case ADD_VLAN_CMD:
523 case DEL_VLAN_CMD:
524 case GET_VLAN_REALDEV_NAME_CMD:
525 case GET_VLAN_VID_CMD:
526 err = -ENODEV;
Pavel Emelyanov65d292a2008-04-16 00:55:06 -0700527 dev = __dev_get_by_name(net, args.device1);
Patrick McHardyc17d8872007-06-13 12:05:22 -0700528 if (!dev)
529 goto out;
530
531 err = -EINVAL;
Joonwoo Park26a25232008-07-08 03:22:16 -0700532 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700533 goto out;
534 }
535
536 switch (args.cmd) {
537 case SET_VLAN_INGRESS_PRIORITY_CMD:
538 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000539 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700540 break;
541 vlan_dev_set_ingress_priority(dev,
542 args.u.skb_priority,
543 args.vlan_qos);
Patrick McHardyfffe4702007-11-07 01:31:32 -0800544 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 break;
546
547 case SET_VLAN_EGRESS_PRIORITY_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700548 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000549 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700550 break;
551 err = vlan_dev_set_egress_priority(dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 args.u.skb_priority,
553 args.vlan_qos);
554 break;
555
556 case SET_VLAN_FLAG_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700557 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000558 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700559 break;
Patrick McHardyb3ce0322008-07-05 21:26:27 -0700560 err = vlan_dev_change_flags(dev,
561 args.vlan_qos ? args.u.flag : 0,
562 args.u.flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 break;
564
565 case SET_VLAN_NAME_TYPE_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700566 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000567 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Pavel Emelyanove35de022007-12-06 22:52:16 -0800568 break;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700569 if ((args.u.name_type >= 0) &&
570 (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700571 struct vlan_net *vn;
572
573 vn = net_generic(net, vlan_net_id);
574 vn->name_type = args.u.name_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 err = 0;
576 } else {
577 err = -EINVAL;
578 }
579 break;
580
581 case ADD_VLAN_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700582 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000583 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700584 break;
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700585 err = register_vlan_device(dev, args.u.VID);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 break;
587
588 case DEL_VLAN_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700589 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000590 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700591 break;
Eric Dumazet23289a32009-10-27 07:06:36 +0000592 unregister_vlan_dev(dev, NULL);
Patrick McHardyaf301512008-01-21 00:25:50 -0800593 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 break;
595
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 case GET_VLAN_REALDEV_NAME_CMD:
Andrew Morton3f5f4342007-07-24 15:37:11 -0700597 err = 0;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700598 vlan_dev_get_realdev_name(dev, args.u.device2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 if (copy_to_user(arg, &args,
Patrick McHardy2029cc22008-01-21 00:26:41 -0800600 sizeof(struct vlan_ioctl_args)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 break;
603
604 case GET_VLAN_VID_CMD:
Andrew Morton3f5f4342007-07-24 15:37:11 -0700605 err = 0;
Patrick McHardy22d1ba72008-07-08 03:23:57 -0700606 args.u.VID = vlan_dev_vlan_id(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 if (copy_to_user(arg, &args,
Patrick McHardy2029cc22008-01-21 00:26:41 -0800608 sizeof(struct vlan_ioctl_args)))
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900609 err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 break;
611
612 default:
Patrick McHardy198a2912008-01-21 00:24:59 -0800613 err = -EOPNOTSUPP;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700614 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700615 }
Mika Kukkonen7eb1b3d2005-12-21 18:39:49 -0800616out:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700617 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 return err;
619}
620
Toshiaki Makita66e51332015-06-01 21:55:06 +0900621static struct sk_buff **vlan_gro_receive(struct sk_buff **head,
622 struct sk_buff *skb)
623{
624 struct sk_buff *p, **pp = NULL;
625 struct vlan_hdr *vhdr;
626 unsigned int hlen, off_vlan;
627 const struct packet_offload *ptype;
628 __be16 type;
629 int flush = 1;
630
631 off_vlan = skb_gro_offset(skb);
632 hlen = off_vlan + sizeof(*vhdr);
633 vhdr = skb_gro_header_fast(skb, off_vlan);
634 if (skb_gro_header_hard(skb, hlen)) {
635 vhdr = skb_gro_header_slow(skb, hlen, off_vlan);
636 if (unlikely(!vhdr))
637 goto out;
638 }
639
640 type = vhdr->h_vlan_encapsulated_proto;
641
642 rcu_read_lock();
643 ptype = gro_find_receive_by_type(type);
644 if (!ptype)
645 goto out_unlock;
646
647 flush = 0;
648
649 for (p = *head; p; p = p->next) {
650 struct vlan_hdr *vhdr2;
651
652 if (!NAPI_GRO_CB(p)->same_flow)
653 continue;
654
655 vhdr2 = (struct vlan_hdr *)(p->data + off_vlan);
656 if (compare_vlan_header(vhdr, vhdr2))
657 NAPI_GRO_CB(p)->same_flow = 0;
658 }
659
660 skb_gro_pull(skb, sizeof(*vhdr));
661 skb_gro_postpull_rcsum(skb, vhdr, sizeof(*vhdr));
662 pp = ptype->callbacks.gro_receive(head, skb);
663
664out_unlock:
665 rcu_read_unlock();
666out:
667 NAPI_GRO_CB(skb)->flush |= flush;
668
669 return pp;
670}
671
672static int vlan_gro_complete(struct sk_buff *skb, int nhoff)
673{
674 struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data + nhoff);
675 __be16 type = vhdr->h_vlan_encapsulated_proto;
676 struct packet_offload *ptype;
677 int err = -ENOENT;
678
679 rcu_read_lock();
680 ptype = gro_find_complete_by_type(type);
681 if (ptype)
682 err = ptype->callbacks.gro_complete(skb, nhoff + sizeof(*vhdr));
683
684 rcu_read_unlock();
685 return err;
686}
687
688static struct packet_offload vlan_packet_offloads[] __read_mostly = {
689 {
690 .type = cpu_to_be16(ETH_P_8021Q),
691 .priority = 10,
692 .callbacks = {
693 .gro_receive = vlan_gro_receive,
694 .gro_complete = vlan_gro_complete,
695 },
696 },
697 {
698 .type = cpu_to_be16(ETH_P_8021AD),
699 .priority = 10,
700 .callbacks = {
701 .gro_receive = vlan_gro_receive,
702 .gro_complete = vlan_gro_complete,
703 },
704 },
705};
706
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000707static int __net_init vlan_init_net(struct net *net)
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700708{
Eric W. Biederman946d1a92009-11-29 15:46:05 +0000709 struct vlan_net *vn = net_generic(net, vlan_net_id);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700710 int err;
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700711
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700712 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
713
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700714 err = vlan_proc_init(net);
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700715
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700716 return err;
717}
718
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000719static void __net_exit vlan_exit_net(struct net *net)
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700720{
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700721 vlan_proc_cleanup(net);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700722}
723
724static struct pernet_operations vlan_net_ops = {
725 .init = vlan_init_net,
726 .exit = vlan_exit_net,
Eric W. Biederman946d1a92009-11-29 15:46:05 +0000727 .id = &vlan_net_id,
728 .size = sizeof(struct vlan_net),
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700729};
730
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800731static int __init vlan_proto_init(void)
732{
733 int err;
Toshiaki Makita66e51332015-06-01 21:55:06 +0900734 unsigned int i;
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800735
Justin Mattockda7c06c2011-05-23 20:43:48 +0000736 pr_info("%s v%s\n", vlan_fullname, vlan_version);
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800737
Eric W. Biederman91e2ff32009-12-02 13:19:08 +0000738 err = register_pernet_subsys(&vlan_net_ops);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700739 if (err < 0)
740 goto err0;
741
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800742 err = register_netdevice_notifier(&vlan_notifier_block);
743 if (err < 0)
744 goto err2;
745
Patrick McHardy70c03b42008-07-05 21:26:57 -0700746 err = vlan_gvrp_init();
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800747 if (err < 0)
748 goto err3;
749
David Ward86fbe9b2013-02-08 17:17:07 +0000750 err = vlan_mvrp_init();
Patrick McHardy70c03b42008-07-05 21:26:57 -0700751 if (err < 0)
752 goto err4;
753
David Ward86fbe9b2013-02-08 17:17:07 +0000754 err = vlan_netlink_init();
755 if (err < 0)
756 goto err5;
757
Toshiaki Makita66e51332015-06-01 21:55:06 +0900758 for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++)
759 dev_add_offload(&vlan_packet_offloads[i]);
760
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800761 vlan_ioctl_set(vlan_ioctl_handler);
762 return 0;
763
David Ward86fbe9b2013-02-08 17:17:07 +0000764err5:
765 vlan_mvrp_uninit();
Patrick McHardy70c03b42008-07-05 21:26:57 -0700766err4:
767 vlan_gvrp_uninit();
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800768err3:
769 unregister_netdevice_notifier(&vlan_notifier_block);
770err2:
Eric W. Biederman91e2ff32009-12-02 13:19:08 +0000771 unregister_pernet_subsys(&vlan_net_ops);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700772err0:
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800773 return err;
774}
775
776static void __exit vlan_cleanup_module(void)
777{
Toshiaki Makita66e51332015-06-01 21:55:06 +0900778 unsigned int i;
779
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800780 vlan_ioctl_set(NULL);
Toshiaki Makita66e51332015-06-01 21:55:06 +0900781
782 for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++)
783 dev_remove_offload(&vlan_packet_offloads[i]);
784
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800785 vlan_netlink_fini();
786
787 unregister_netdevice_notifier(&vlan_notifier_block);
788
Eric W. Biederman91e2ff32009-12-02 13:19:08 +0000789 unregister_pernet_subsys(&vlan_net_ops);
Jesper Dangaard Brouer6e327c12009-06-08 03:11:28 +0000790 rcu_barrier(); /* Wait for completion of call_rcu()'s */
Patrick McHardy70c03b42008-07-05 21:26:57 -0700791
David Ward86fbe9b2013-02-08 17:17:07 +0000792 vlan_mvrp_uninit();
Patrick McHardy70c03b42008-07-05 21:26:57 -0700793 vlan_gvrp_uninit();
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800794}
795
796module_init(vlan_proto_init);
797module_exit(vlan_cleanup_module);
798
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799MODULE_LICENSE("GPL");
800MODULE_VERSION(DRV_VERSION);