blob: 467069b73ce1b89e5a7b72904a878ef1f3412c67 [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>
Linus Torvalds7c0f6ba2016-12-24 11:46:01 -080037#include <linux/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
Alexey Dobriyanc7d03a02016-11-17 04:58:21 +030047unsigned int 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 McHardyc1d3ee992007-06-13 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 McHardyc1d3ee992007-06-13 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 McHardyc1d3ee992007-06-13 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 McHardyc1d3ee992007-06-13 12:06:14 -0700136 return -EEXIST;
Patrick McHardyc1d3ee992007-06-13 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
Sabrina Dubroca952fcfd2016-08-12 16:10:33 +0200172 vlan->nest_level = dev_get_nest_level(real_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;
264
Wang Sheng-Hui0c0667a2013-08-03 16:54:50 +0800265 vlan = vlan_dev_priv(new_dev);
266 vlan->vlan_proto = htons(ETH_P_8021Q);
267 vlan->vlan_id = vlan_id;
268 vlan->real_dev = real_dev;
269 vlan->dent = NULL;
270 vlan->flags = VLAN_FLAG_REORDER_HDR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271
Patrick McHardy07b5b172007-06-13 12:07:54 -0700272 new_dev->rtnl_link_ops = &vlan_link_ops;
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700273 err = register_vlan_dev(new_dev);
274 if (err < 0)
Patrick McHardye89fe422007-06-13 12:06:29 -0700275 goto out_free_newdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700277 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279out_free_newdev:
280 free_netdev(new_dev);
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700281 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282}
283
Patrick McHardy8c979c22007-07-11 19:45:24 -0700284static void vlan_sync_address(struct net_device *dev,
285 struct net_device *vlandev)
286{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000287 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700288
289 /* May be called without an actual change */
Joe Perches53a2b3a2012-05-08 18:56:47 +0000290 if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr))
Patrick McHardy8c979c22007-07-11 19:45:24 -0700291 return;
292
Mike Manning308453a2016-05-27 17:45:07 +0100293 /* vlan continues to inherit address of lower device */
294 if (vlan_dev_inherit_address(vlandev, dev))
295 goto out;
296
Patrick McHardy8c979c22007-07-11 19:45:24 -0700297 /* vlan address was different from the old address and is equal to
298 * the new address */
Joe Perches53a2b3a2012-05-08 18:56:47 +0000299 if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
300 ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000301 dev_uc_del(dev, vlandev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700302
303 /* vlan address was equal to the old address and is different from
304 * the new address */
Joe Perches53a2b3a2012-05-08 18:56:47 +0000305 if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
306 !ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000307 dev_uc_add(dev, vlandev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700308
Mike Manning308453a2016-05-27 17:45:07 +0100309out:
Joe Perches07fc67b2014-01-20 09:52:14 -0800310 ether_addr_copy(vlan->real_dev_addr, dev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700311}
312
Patrick McHardy5fb13572008-05-20 14:54:50 -0700313static void vlan_transfer_features(struct net_device *dev,
314 struct net_device *vlandev)
315{
Vlad Yasevichfc0d48b2014-03-26 11:47:56 -0400316 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
317
Alexander Duyck1ae4be22008-09-11 20:17:05 -0700318 vlandev->gso_max_size = dev->gso_max_size;
Eric Dumazetf6773c52016-03-16 21:59:49 -0700319 vlandev->gso_max_segs = dev->gso_max_segs;
John Fastabend029f5fc2010-10-30 14:22:32 +0000320
Vlad Yasevichfc0d48b2014-03-26 11:47:56 -0400321 if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto))
John Fastabend029f5fc2010-10-30 14:22:32 +0000322 vlandev->hard_header_len = dev->hard_header_len;
323 else
324 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
325
Amerigo Wangf4d53922012-10-29 17:22:28 +0000326#if IS_ENABLED(CONFIG_FCOE)
Vasu Devb85daa52009-08-14 12:41:07 +0000327 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
328#endif
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700329
330 netdev_update_features(vlandev);
Patrick McHardy5fb13572008-05-20 14:54:50 -0700331}
332
WANG Cong9c5ff242014-07-25 15:25:10 -0700333static int __vlan_device_event(struct net_device *dev, unsigned long event)
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700334{
WANG Cong9c5ff242014-07-25 15:25:10 -0700335 int err = 0;
336
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700337 switch (event) {
338 case NETDEV_CHANGENAME:
339 vlan_proc_rem_dev(dev);
WANG Cong9c5ff242014-07-25 15:25:10 -0700340 err = vlan_proc_add_dev(dev);
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700341 break;
Pavel Emelyanov30688a92008-04-16 00:57:01 -0700342 case NETDEV_REGISTER:
WANG Cong9c5ff242014-07-25 15:25:10 -0700343 err = vlan_proc_add_dev(dev);
Pavel Emelyanov30688a92008-04-16 00:57:01 -0700344 break;
345 case NETDEV_UNREGISTER:
346 vlan_proc_rem_dev(dev);
347 break;
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700348 }
WANG Cong9c5ff242014-07-25 15:25:10 -0700349
350 return err;
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700351}
352
Patrick McHardy2029cc22008-01-21 00:26:41 -0800353static int vlan_device_event(struct notifier_block *unused, unsigned long event,
354 void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355{
Jiri Pirko351638e2013-05-28 01:30:21 +0000356 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700357 struct vlan_group *grp;
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000358 struct vlan_info *vlan_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 int i, flgs;
360 struct net_device *vlandev;
Jiri Pirko7da82c02011-12-08 04:11:15 +0000361 struct vlan_dev_priv *vlan;
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000362 bool last = false;
Patrick McHardy29906f62009-10-29 23:43:00 -0700363 LIST_HEAD(list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
WANG Cong9c5ff242014-07-25 15:25:10 -0700365 if (is_vlan_dev(dev)) {
366 int err = __vlan_device_event(dev, event);
367
368 if (err)
369 return notifier_from_errno(err);
370 }
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700371
Pedro Garciaad1afb02010-07-18 15:38:44 -0700372 if ((event == NETDEV_UP) &&
Patrick McHardyf6469682013-04-19 02:04:27 +0000373 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) {
Joe Perchesafab2d22011-05-26 10:58:31 +0000374 pr_info("adding VLAN 0 to HW filter on device %s\n",
Pedro Garciaad1afb02010-07-18 15:38:44 -0700375 dev->name);
Patrick McHardy80d5c362013-04-19 02:04:28 +0000376 vlan_vid_add(dev, htons(ETH_P_8021Q), 0);
Pedro Garciaad1afb02010-07-18 15:38:44 -0700377 }
378
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000379 vlan_info = rtnl_dereference(dev->vlan_info);
380 if (!vlan_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 goto out;
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000382 grp = &vlan_info->grp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383
384 /* It is OK that we do not hold the group lock right now,
385 * as we run under the RTNL lock.
386 */
387
388 switch (event) {
389 case NETDEV_CHANGE:
390 /* Propagate real device state to vlan devices */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000391 vlan_group_for_each_dev(grp, i, vlandev)
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800392 netif_stacked_transfer_operstate(dev, vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 break;
394
Patrick McHardy8c979c22007-07-11 19:45:24 -0700395 case NETDEV_CHANGEADDR:
396 /* Adjust unicast filters on underlying device */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000397 vlan_group_for_each_dev(grp, i, vlandev) {
Patrick McHardyd932e042007-11-10 21:51:40 -0800398 flgs = vlandev->flags;
399 if (!(flgs & IFF_UP))
400 continue;
401
Patrick McHardy8c979c22007-07-11 19:45:24 -0700402 vlan_sync_address(dev, vlandev);
403 }
404 break;
405
Herbert Xu2e477c92009-07-20 07:35:37 -0700406 case NETDEV_CHANGEMTU:
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000407 vlan_group_for_each_dev(grp, i, vlandev) {
Herbert Xu2e477c92009-07-20 07:35:37 -0700408 if (vlandev->mtu <= dev->mtu)
409 continue;
410
411 dev_set_mtu(vlandev, dev->mtu);
412 }
413 break;
414
Patrick McHardy5fb13572008-05-20 14:54:50 -0700415 case NETDEV_FEAT_CHANGE:
416 /* Propagate device features to underlying device */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000417 vlan_group_for_each_dev(grp, i, vlandev)
Patrick McHardy5fb13572008-05-20 14:54:50 -0700418 vlan_transfer_features(dev, vlandev);
Patrick McHardy5fb13572008-05-20 14:54:50 -0700419 break;
420
David S. Miller99c4a262015-03-18 22:52:33 -0400421 case NETDEV_DOWN: {
422 struct net_device *tmp;
423 LIST_HEAD(close_list);
424
Patrick McHardyf6469682013-04-19 02:04:27 +0000425 if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)
Patrick McHardy80d5c362013-04-19 02:04:28 +0000426 vlan_vid_del(dev, htons(ETH_P_8021Q), 0);
Amir Hananiaefc73f42012-07-09 20:47:19 +0000427
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 /* Put all VLANs for this dev in the down state too. */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000429 vlan_group_for_each_dev(grp, i, vlandev) {
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))
David S. Miller99c4a262015-03-18 22:52:33 -0400436 list_add(&vlandev->close_list, &close_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
David S. Miller99c4a262015-03-18 22:52:33 -0400439 dev_close_many(&close_list, false);
440
441 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) {
442 netif_stacked_transfer_operstate(dev, vlandev);
443 list_del_init(&vlandev->close_list);
444 }
445 list_del(&close_list);
446 break;
447 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 case NETDEV_UP:
449 /* Put all VLANs for this dev in the up state too. */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000450 vlan_group_for_each_dev(grp, i, vlandev) {
Vlad Yasevichbe346ff2015-05-12 20:53:14 -0400451 flgs = dev_get_flags(vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 if (flgs & IFF_UP)
453 continue;
454
Jiri Pirko7da82c02011-12-08 04:11:15 +0000455 vlan = vlan_dev_priv(vlandev);
Patrick McHardy5e756592009-11-25 07:54:54 +0000456 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
457 dev_change_flags(vlandev, flgs | IFF_UP);
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800458 netif_stacked_transfer_operstate(dev, vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 }
460 break;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900461
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 case NETDEV_UNREGISTER:
David Lamparter3b27e102010-09-17 03:22:19 +0000463 /* twiddle thumbs on netns device moves */
464 if (dev->reg_state != NETREG_UNREGISTERING)
465 break;
466
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000467 vlan_group_for_each_dev(grp, i, vlandev) {
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000468 /* removal of last vid destroys vlan_info, abort
Patrick McHardy29906f62009-10-29 23:43:00 -0700469 * afterwards */
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000470 if (vlan_info->nr_vids == 1)
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000471 last = true;
Patrick McHardy29906f62009-10-29 23:43:00 -0700472
473 unregister_vlan_dev(vlandev, &list);
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000474 if (last)
475 break;
Patrick McHardy29906f62009-10-29 23:43:00 -0700476 }
477 unregister_netdevice_many(&list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 break;
Jiri Pirko1c01fe12010-03-10 10:30:19 +0000479
480 case NETDEV_PRE_TYPE_CHANGE:
481 /* Forbid underlaying device to change its type. */
Jiri Pirko18c22a02012-10-17 01:37:36 +0000482 if (vlan_uses_dev(dev))
483 return NOTIFY_BAD;
484 break;
Ben Hutchings99606472011-04-15 13:46:49 +0000485
486 case NETDEV_NOTIFY_PEERS:
Ben Hutchings7c899432011-04-15 13:47:51 +0000487 case NETDEV_BONDING_FAILOVER:
Jiri Pirko4aa5dee2013-07-20 12:13:53 +0200488 case NETDEV_RESEND_IGMP:
Ben Hutchings99606472011-04-15 13:46:49 +0000489 /* Propagate to vlan devices */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000490 vlan_group_for_each_dev(grp, i, vlandev)
Ben Hutchings7c899432011-04-15 13:47:51 +0000491 call_netdevice_notifiers(event, vlandev);
Ben Hutchings99606472011-04-15 13:46:49 +0000492 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700493 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494
495out:
496 return NOTIFY_DONE;
497}
498
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800499static struct notifier_block vlan_notifier_block __read_mostly = {
500 .notifier_call = vlan_device_event,
501};
502
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503/*
504 * VLAN IOCTL handler.
505 * o execute requested action or pass command to the device driver
506 * arg is really a struct vlan_ioctl_args __user *.
507 */
Eric W. Biederman881d9662007-09-17 11:56:21 -0700508static int vlan_ioctl_handler(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509{
Patrick McHardyc17d8872007-06-13 12:05:22 -0700510 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 struct vlan_ioctl_args args;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700512 struct net_device *dev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
514 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
515 return -EFAULT;
516
517 /* Null terminate this sucker, just in case. */
Gao Feng9c403b62016-10-18 08:57:50 +0800518 args.device1[sizeof(args.device1) - 1] = 0;
519 args.u.device2[sizeof(args.u.device2) - 1] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520
Patrick McHardyc17d8872007-06-13 12:05:22 -0700521 rtnl_lock();
522
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 switch (args.cmd) {
524 case SET_VLAN_INGRESS_PRIORITY_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700525 case SET_VLAN_EGRESS_PRIORITY_CMD:
526 case SET_VLAN_FLAG_CMD:
527 case ADD_VLAN_CMD:
528 case DEL_VLAN_CMD:
529 case GET_VLAN_REALDEV_NAME_CMD:
530 case GET_VLAN_VID_CMD:
531 err = -ENODEV;
Pavel Emelyanov65d292a2008-04-16 00:55:06 -0700532 dev = __dev_get_by_name(net, args.device1);
Patrick McHardyc17d8872007-06-13 12:05:22 -0700533 if (!dev)
534 goto out;
535
536 err = -EINVAL;
Joonwoo Park26a25232008-07-08 03:22:16 -0700537 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700538 goto out;
539 }
540
541 switch (args.cmd) {
542 case SET_VLAN_INGRESS_PRIORITY_CMD:
543 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000544 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700545 break;
546 vlan_dev_set_ingress_priority(dev,
547 args.u.skb_priority,
548 args.vlan_qos);
Patrick McHardyfffe4702007-11-07 01:31:32 -0800549 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 break;
551
552 case SET_VLAN_EGRESS_PRIORITY_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700553 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000554 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700555 break;
556 err = vlan_dev_set_egress_priority(dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 args.u.skb_priority,
558 args.vlan_qos);
559 break;
560
561 case SET_VLAN_FLAG_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700562 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000563 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700564 break;
Patrick McHardyb3ce0322008-07-05 21:26:27 -0700565 err = vlan_dev_change_flags(dev,
566 args.vlan_qos ? args.u.flag : 0,
567 args.u.flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 break;
569
570 case SET_VLAN_NAME_TYPE_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700571 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000572 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Pavel Emelyanove35de022007-12-06 22:52:16 -0800573 break;
Tobias Klauser403f0722016-10-18 08:44:17 +0200574 if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) {
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700575 struct vlan_net *vn;
576
577 vn = net_generic(net, vlan_net_id);
578 vn->name_type = args.u.name_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 err = 0;
580 } else {
581 err = -EINVAL;
582 }
583 break;
584
585 case ADD_VLAN_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700586 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000587 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700588 break;
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700589 err = register_vlan_device(dev, args.u.VID);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 break;
591
592 case DEL_VLAN_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700593 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000594 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700595 break;
Eric Dumazet23289a32009-10-27 07:06:36 +0000596 unregister_vlan_dev(dev, NULL);
Patrick McHardyaf301512008-01-21 00:25:50 -0800597 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 break;
599
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 case GET_VLAN_REALDEV_NAME_CMD:
Andrew Morton3f5f4342007-07-24 15:37:11 -0700601 err = 0;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700602 vlan_dev_get_realdev_name(dev, args.u.device2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 if (copy_to_user(arg, &args,
Patrick McHardy2029cc22008-01-21 00:26:41 -0800604 sizeof(struct vlan_ioctl_args)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 break;
607
608 case GET_VLAN_VID_CMD:
Andrew Morton3f5f4342007-07-24 15:37:11 -0700609 err = 0;
Patrick McHardy22d1ba72008-07-08 03:23:57 -0700610 args.u.VID = vlan_dev_vlan_id(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 if (copy_to_user(arg, &args,
Patrick McHardy2029cc22008-01-21 00:26:41 -0800612 sizeof(struct vlan_ioctl_args)))
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900613 err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 break;
615
616 default:
Patrick McHardy198a2912008-01-21 00:24:59 -0800617 err = -EOPNOTSUPP;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700618 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700619 }
Mika Kukkonen7eb1b3d2005-12-21 18:39:49 -0800620out:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700621 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 return err;
623}
624
Toshiaki Makita66e51332015-06-01 21:55:06 +0900625static struct sk_buff **vlan_gro_receive(struct sk_buff **head,
626 struct sk_buff *skb)
627{
628 struct sk_buff *p, **pp = NULL;
629 struct vlan_hdr *vhdr;
630 unsigned int hlen, off_vlan;
631 const struct packet_offload *ptype;
632 __be16 type;
633 int flush = 1;
634
635 off_vlan = skb_gro_offset(skb);
636 hlen = off_vlan + sizeof(*vhdr);
637 vhdr = skb_gro_header_fast(skb, off_vlan);
638 if (skb_gro_header_hard(skb, hlen)) {
639 vhdr = skb_gro_header_slow(skb, hlen, off_vlan);
640 if (unlikely(!vhdr))
641 goto out;
642 }
643
644 type = vhdr->h_vlan_encapsulated_proto;
645
646 rcu_read_lock();
647 ptype = gro_find_receive_by_type(type);
648 if (!ptype)
649 goto out_unlock;
650
651 flush = 0;
652
653 for (p = *head; p; p = p->next) {
654 struct vlan_hdr *vhdr2;
655
656 if (!NAPI_GRO_CB(p)->same_flow)
657 continue;
658
659 vhdr2 = (struct vlan_hdr *)(p->data + off_vlan);
660 if (compare_vlan_header(vhdr, vhdr2))
661 NAPI_GRO_CB(p)->same_flow = 0;
662 }
663
664 skb_gro_pull(skb, sizeof(*vhdr));
665 skb_gro_postpull_rcsum(skb, vhdr, sizeof(*vhdr));
Sabrina Dubrocafcd91dd2016-10-20 15:58:02 +0200666 pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb);
Toshiaki Makita66e51332015-06-01 21:55:06 +0900667
668out_unlock:
669 rcu_read_unlock();
670out:
671 NAPI_GRO_CB(skb)->flush |= flush;
672
673 return pp;
674}
675
676static int vlan_gro_complete(struct sk_buff *skb, int nhoff)
677{
678 struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data + nhoff);
679 __be16 type = vhdr->h_vlan_encapsulated_proto;
680 struct packet_offload *ptype;
681 int err = -ENOENT;
682
683 rcu_read_lock();
684 ptype = gro_find_complete_by_type(type);
685 if (ptype)
686 err = ptype->callbacks.gro_complete(skb, nhoff + sizeof(*vhdr));
687
688 rcu_read_unlock();
689 return err;
690}
691
692static struct packet_offload vlan_packet_offloads[] __read_mostly = {
693 {
694 .type = cpu_to_be16(ETH_P_8021Q),
695 .priority = 10,
696 .callbacks = {
697 .gro_receive = vlan_gro_receive,
698 .gro_complete = vlan_gro_complete,
699 },
700 },
701 {
702 .type = cpu_to_be16(ETH_P_8021AD),
703 .priority = 10,
704 .callbacks = {
705 .gro_receive = vlan_gro_receive,
706 .gro_complete = vlan_gro_complete,
707 },
708 },
709};
710
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000711static int __net_init vlan_init_net(struct net *net)
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700712{
Eric W. Biederman946d1a92009-11-29 15:46:05 +0000713 struct vlan_net *vn = net_generic(net, vlan_net_id);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700714 int err;
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700715
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700716 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
717
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700718 err = vlan_proc_init(net);
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700719
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700720 return err;
721}
722
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000723static void __net_exit vlan_exit_net(struct net *net)
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700724{
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700725 vlan_proc_cleanup(net);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700726}
727
728static struct pernet_operations vlan_net_ops = {
729 .init = vlan_init_net,
730 .exit = vlan_exit_net,
Eric W. Biederman946d1a92009-11-29 15:46:05 +0000731 .id = &vlan_net_id,
732 .size = sizeof(struct vlan_net),
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700733};
734
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800735static int __init vlan_proto_init(void)
736{
737 int err;
Toshiaki Makita66e51332015-06-01 21:55:06 +0900738 unsigned int i;
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800739
Justin Mattockda7c06c2011-05-23 20:43:48 +0000740 pr_info("%s v%s\n", vlan_fullname, vlan_version);
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800741
Eric W. Biederman91e2ff32009-12-02 13:19:08 +0000742 err = register_pernet_subsys(&vlan_net_ops);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700743 if (err < 0)
744 goto err0;
745
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800746 err = register_netdevice_notifier(&vlan_notifier_block);
747 if (err < 0)
748 goto err2;
749
Patrick McHardy70c03b42008-07-05 21:26:57 -0700750 err = vlan_gvrp_init();
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800751 if (err < 0)
752 goto err3;
753
David Ward86fbe9b2013-02-08 17:17:07 +0000754 err = vlan_mvrp_init();
Patrick McHardy70c03b42008-07-05 21:26:57 -0700755 if (err < 0)
756 goto err4;
757
David Ward86fbe9b2013-02-08 17:17:07 +0000758 err = vlan_netlink_init();
759 if (err < 0)
760 goto err5;
761
Toshiaki Makita66e51332015-06-01 21:55:06 +0900762 for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++)
763 dev_add_offload(&vlan_packet_offloads[i]);
764
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800765 vlan_ioctl_set(vlan_ioctl_handler);
766 return 0;
767
David Ward86fbe9b2013-02-08 17:17:07 +0000768err5:
769 vlan_mvrp_uninit();
Patrick McHardy70c03b42008-07-05 21:26:57 -0700770err4:
771 vlan_gvrp_uninit();
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800772err3:
773 unregister_netdevice_notifier(&vlan_notifier_block);
774err2:
Eric W. Biederman91e2ff32009-12-02 13:19:08 +0000775 unregister_pernet_subsys(&vlan_net_ops);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700776err0:
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800777 return err;
778}
779
780static void __exit vlan_cleanup_module(void)
781{
Toshiaki Makita66e51332015-06-01 21:55:06 +0900782 unsigned int i;
783
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800784 vlan_ioctl_set(NULL);
Toshiaki Makita66e51332015-06-01 21:55:06 +0900785
786 for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++)
787 dev_remove_offload(&vlan_packet_offloads[i]);
788
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800789 vlan_netlink_fini();
790
791 unregister_netdevice_notifier(&vlan_notifier_block);
792
Eric W. Biederman91e2ff32009-12-02 13:19:08 +0000793 unregister_pernet_subsys(&vlan_net_ops);
Jesper Dangaard Brouer6e327c12009-06-08 03:11:28 +0000794 rcu_barrier(); /* Wait for completion of call_rcu()'s */
Patrick McHardy70c03b42008-07-05 21:26:57 -0700795
David Ward86fbe9b2013-02-08 17:17:07 +0000796 vlan_mvrp_uninit();
Patrick McHardy70c03b42008-07-05 21:26:57 -0700797 vlan_gvrp_uninit();
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800798}
799
800module_init(vlan_proto_init);
801module_exit(vlan_cleanup_module);
802
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803MODULE_LICENSE("GPL");
804MODULE_VERSION(DRV_VERSION);