blob: 44ebd5c2cd4aef0f86bd6475132cc40c501c6fef [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
Jiri Pirko7da82c02011-12-08 04:11:15 +0000253 new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, vlan_setup);
Arjan van de Ven5dd8d1e2006-07-03 00:25:33 -0700254
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 if (new_dev == NULL)
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700256 return -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
Pavel Emelyanov65d292a2008-04-16 00:55:06 -0700258 dev_net_set(new_dev, net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 /* need 4 bytes for extra VLAN header info,
260 * hope the underlying device can handle it.
261 */
262 new_dev->mtu = real_dev->mtu;
Yi Zou6e22ce22012-11-28 13:45:24 +0000263 new_dev->priv_flags |= (real_dev->priv_flags & IFF_UNICAST_FLT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
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
293 /* vlan address was different from the old address and is equal to
294 * the new address */
Joe Perches53a2b3a2012-05-08 18:56:47 +0000295 if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
296 ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000297 dev_uc_del(dev, vlandev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700298
299 /* vlan address was equal to the old address and is different from
300 * the new address */
Joe Perches53a2b3a2012-05-08 18:56:47 +0000301 if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
302 !ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000303 dev_uc_add(dev, vlandev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700304
Joe Perches07fc67b2014-01-20 09:52:14 -0800305 ether_addr_copy(vlan->real_dev_addr, dev->dev_addr);
Patrick McHardy8c979c22007-07-11 19:45:24 -0700306}
307
Patrick McHardy5fb13572008-05-20 14:54:50 -0700308static void vlan_transfer_features(struct net_device *dev,
309 struct net_device *vlandev)
310{
Vlad Yasevichfc0d48b2014-03-26 11:47:56 -0400311 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
312
Alexander Duyck1ae4be22008-09-11 20:17:05 -0700313 vlandev->gso_max_size = dev->gso_max_size;
John Fastabend029f5fc2010-10-30 14:22:32 +0000314
Vlad Yasevichfc0d48b2014-03-26 11:47:56 -0400315 if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto))
John Fastabend029f5fc2010-10-30 14:22:32 +0000316 vlandev->hard_header_len = dev->hard_header_len;
317 else
318 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
319
Amerigo Wangf4d53922012-10-29 17:22:28 +0000320#if IS_ENABLED(CONFIG_FCOE)
Vasu Devb85daa52009-08-14 12:41:07 +0000321 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
322#endif
Michał Mirosław8a0427b2011-04-02 22:49:12 -0700323
324 netdev_update_features(vlandev);
Patrick McHardy5fb13572008-05-20 14:54:50 -0700325}
326
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700327static void __vlan_device_event(struct net_device *dev, unsigned long event)
328{
329 switch (event) {
330 case NETDEV_CHANGENAME:
331 vlan_proc_rem_dev(dev);
332 if (vlan_proc_add_dev(dev) < 0)
Joe Perchesafab2d22011-05-26 10:58:31 +0000333 pr_warn("failed to change proc name for %s\n",
334 dev->name);
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700335 break;
Pavel Emelyanov30688a92008-04-16 00:57:01 -0700336 case NETDEV_REGISTER:
337 if (vlan_proc_add_dev(dev) < 0)
Joe Perchesafab2d22011-05-26 10:58:31 +0000338 pr_warn("failed to add proc entry for %s\n", dev->name);
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 }
344}
345
Patrick McHardy2029cc22008-01-21 00:26:41 -0800346static int vlan_device_event(struct notifier_block *unused, unsigned long event,
347 void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348{
Jiri Pirko351638e2013-05-28 01:30:21 +0000349 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700350 struct vlan_group *grp;
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000351 struct vlan_info *vlan_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 int i, flgs;
353 struct net_device *vlandev;
Jiri Pirko7da82c02011-12-08 04:11:15 +0000354 struct vlan_dev_priv *vlan;
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000355 bool last = false;
Patrick McHardy29906f62009-10-29 23:43:00 -0700356 LIST_HEAD(list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357
Patrick McHardy81d85342008-05-20 14:37:36 -0700358 if (is_vlan_dev(dev))
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700359 __vlan_device_event(dev, event);
Pavel Emelyanov802fb172008-04-02 00:08:01 -0700360
Pedro Garciaad1afb02010-07-18 15:38:44 -0700361 if ((event == NETDEV_UP) &&
Patrick McHardyf6469682013-04-19 02:04:27 +0000362 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) {
Joe Perchesafab2d22011-05-26 10:58:31 +0000363 pr_info("adding VLAN 0 to HW filter on device %s\n",
Pedro Garciaad1afb02010-07-18 15:38:44 -0700364 dev->name);
Patrick McHardy80d5c362013-04-19 02:04:28 +0000365 vlan_vid_add(dev, htons(ETH_P_8021Q), 0);
Pedro Garciaad1afb02010-07-18 15:38:44 -0700366 }
367
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000368 vlan_info = rtnl_dereference(dev->vlan_info);
369 if (!vlan_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 goto out;
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000371 grp = &vlan_info->grp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372
373 /* It is OK that we do not hold the group lock right now,
374 * as we run under the RTNL lock.
375 */
376
377 switch (event) {
378 case NETDEV_CHANGE:
379 /* Propagate real device state to vlan devices */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000380 vlan_group_for_each_dev(grp, i, vlandev)
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800381 netif_stacked_transfer_operstate(dev, vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 break;
383
Patrick McHardy8c979c22007-07-11 19:45:24 -0700384 case NETDEV_CHANGEADDR:
385 /* Adjust unicast filters on underlying device */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000386 vlan_group_for_each_dev(grp, i, vlandev) {
Patrick McHardyd932e042007-11-10 21:51:40 -0800387 flgs = vlandev->flags;
388 if (!(flgs & IFF_UP))
389 continue;
390
Patrick McHardy8c979c22007-07-11 19:45:24 -0700391 vlan_sync_address(dev, vlandev);
392 }
393 break;
394
Herbert Xu2e477c92009-07-20 07:35:37 -0700395 case NETDEV_CHANGEMTU:
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000396 vlan_group_for_each_dev(grp, i, vlandev) {
Herbert Xu2e477c92009-07-20 07:35:37 -0700397 if (vlandev->mtu <= dev->mtu)
398 continue;
399
400 dev_set_mtu(vlandev, dev->mtu);
401 }
402 break;
403
Patrick McHardy5fb13572008-05-20 14:54:50 -0700404 case NETDEV_FEAT_CHANGE:
405 /* Propagate device features to underlying device */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000406 vlan_group_for_each_dev(grp, i, vlandev)
Patrick McHardy5fb13572008-05-20 14:54:50 -0700407 vlan_transfer_features(dev, vlandev);
Patrick McHardy5fb13572008-05-20 14:54:50 -0700408 break;
409
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 case NETDEV_DOWN:
Patrick McHardyf6469682013-04-19 02:04:27 +0000411 if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)
Patrick McHardy80d5c362013-04-19 02:04:28 +0000412 vlan_vid_del(dev, htons(ETH_P_8021Q), 0);
Amir Hananiaefc73f42012-07-09 20:47:19 +0000413
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 /* Put all VLANs for this dev in the down state too. */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000415 vlan_group_for_each_dev(grp, i, vlandev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 flgs = vlandev->flags;
417 if (!(flgs & IFF_UP))
418 continue;
419
Jiri Pirko7da82c02011-12-08 04:11:15 +0000420 vlan = vlan_dev_priv(vlandev);
Patrick McHardy5e756592009-11-25 07:54:54 +0000421 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
422 dev_change_flags(vlandev, flgs & ~IFF_UP);
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800423 netif_stacked_transfer_operstate(dev, vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 }
425 break;
426
427 case NETDEV_UP:
428 /* Put all VLANs for this dev in the up 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))
436 dev_change_flags(vlandev, flgs | IFF_UP);
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800437 netif_stacked_transfer_operstate(dev, vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 }
439 break;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900440
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 case NETDEV_UNREGISTER:
David Lamparter3b27e102010-09-17 03:22:19 +0000442 /* twiddle thumbs on netns device moves */
443 if (dev->reg_state != NETREG_UNREGISTERING)
444 break;
445
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000446 vlan_group_for_each_dev(grp, i, vlandev) {
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000447 /* removal of last vid destroys vlan_info, abort
Patrick McHardy29906f62009-10-29 23:43:00 -0700448 * afterwards */
Jiri Pirko5b9ea6e2011-12-08 04:11:18 +0000449 if (vlan_info->nr_vids == 1)
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000450 last = true;
Patrick McHardy29906f62009-10-29 23:43:00 -0700451
452 unregister_vlan_dev(vlandev, &list);
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000453 if (last)
454 break;
Patrick McHardy29906f62009-10-29 23:43:00 -0700455 }
456 unregister_netdevice_many(&list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 break;
Jiri Pirko1c01fe12010-03-10 10:30:19 +0000458
459 case NETDEV_PRE_TYPE_CHANGE:
460 /* Forbid underlaying device to change its type. */
Jiri Pirko18c22a02012-10-17 01:37:36 +0000461 if (vlan_uses_dev(dev))
462 return NOTIFY_BAD;
463 break;
Ben Hutchings99606472011-04-15 13:46:49 +0000464
465 case NETDEV_NOTIFY_PEERS:
Ben Hutchings7c899432011-04-15 13:47:51 +0000466 case NETDEV_BONDING_FAILOVER:
Jiri Pirko4aa5dee2013-07-20 12:13:53 +0200467 case NETDEV_RESEND_IGMP:
Ben Hutchings99606472011-04-15 13:46:49 +0000468 /* Propagate to vlan devices */
Patrick McHardy1fd9b1f2013-04-19 02:04:29 +0000469 vlan_group_for_each_dev(grp, i, vlandev)
Ben Hutchings7c899432011-04-15 13:47:51 +0000470 call_netdevice_notifiers(event, vlandev);
Ben Hutchings99606472011-04-15 13:46:49 +0000471 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700472 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
474out:
475 return NOTIFY_DONE;
476}
477
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800478static struct notifier_block vlan_notifier_block __read_mostly = {
479 .notifier_call = vlan_device_event,
480};
481
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482/*
483 * VLAN IOCTL handler.
484 * o execute requested action or pass command to the device driver
485 * arg is really a struct vlan_ioctl_args __user *.
486 */
Eric W. Biederman881d9662007-09-17 11:56:21 -0700487static int vlan_ioctl_handler(struct net *net, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488{
Patrick McHardyc17d8872007-06-13 12:05:22 -0700489 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 struct vlan_ioctl_args args;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700491 struct net_device *dev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492
493 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
494 return -EFAULT;
495
496 /* Null terminate this sucker, just in case. */
497 args.device1[23] = 0;
498 args.u.device2[23] = 0;
499
Patrick McHardyc17d8872007-06-13 12:05:22 -0700500 rtnl_lock();
501
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 switch (args.cmd) {
503 case SET_VLAN_INGRESS_PRIORITY_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700504 case SET_VLAN_EGRESS_PRIORITY_CMD:
505 case SET_VLAN_FLAG_CMD:
506 case ADD_VLAN_CMD:
507 case DEL_VLAN_CMD:
508 case GET_VLAN_REALDEV_NAME_CMD:
509 case GET_VLAN_VID_CMD:
510 err = -ENODEV;
Pavel Emelyanov65d292a2008-04-16 00:55:06 -0700511 dev = __dev_get_by_name(net, args.device1);
Patrick McHardyc17d8872007-06-13 12:05:22 -0700512 if (!dev)
513 goto out;
514
515 err = -EINVAL;
Joonwoo Park26a25232008-07-08 03:22:16 -0700516 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700517 goto out;
518 }
519
520 switch (args.cmd) {
521 case SET_VLAN_INGRESS_PRIORITY_CMD:
522 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000523 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700524 break;
525 vlan_dev_set_ingress_priority(dev,
526 args.u.skb_priority,
527 args.vlan_qos);
Patrick McHardyfffe4702007-11-07 01:31:32 -0800528 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 break;
530
531 case SET_VLAN_EGRESS_PRIORITY_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700532 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000533 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700534 break;
535 err = vlan_dev_set_egress_priority(dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 args.u.skb_priority,
537 args.vlan_qos);
538 break;
539
540 case SET_VLAN_FLAG_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700541 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000542 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700543 break;
Patrick McHardyb3ce0322008-07-05 21:26:27 -0700544 err = vlan_dev_change_flags(dev,
545 args.vlan_qos ? args.u.flag : 0,
546 args.u.flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 break;
548
549 case SET_VLAN_NAME_TYPE_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700550 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000551 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Pavel Emelyanove35de022007-12-06 22:52:16 -0800552 break;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700553 if ((args.u.name_type >= 0) &&
554 (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700555 struct vlan_net *vn;
556
557 vn = net_generic(net, vlan_net_id);
558 vn->name_type = args.u.name_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 err = 0;
560 } else {
561 err = -EINVAL;
562 }
563 break;
564
565 case ADD_VLAN_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))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700568 break;
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700569 err = register_vlan_device(dev, args.u.VID);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 break;
571
572 case DEL_VLAN_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700573 err = -EPERM;
Eric W. Biederman276996f2012-11-16 03:03:09 +0000574 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700575 break;
Eric Dumazet23289a32009-10-27 07:06:36 +0000576 unregister_vlan_dev(dev, NULL);
Patrick McHardyaf301512008-01-21 00:25:50 -0800577 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 break;
579
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 case GET_VLAN_REALDEV_NAME_CMD:
Andrew Morton3f5f4342007-07-24 15:37:11 -0700581 err = 0;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700582 vlan_dev_get_realdev_name(dev, args.u.device2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 if (copy_to_user(arg, &args,
Patrick McHardy2029cc22008-01-21 00:26:41 -0800584 sizeof(struct vlan_ioctl_args)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 break;
587
588 case GET_VLAN_VID_CMD:
Andrew Morton3f5f4342007-07-24 15:37:11 -0700589 err = 0;
Patrick McHardy22d1ba72008-07-08 03:23:57 -0700590 args.u.VID = vlan_dev_vlan_id(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 if (copy_to_user(arg, &args,
Patrick McHardy2029cc22008-01-21 00:26:41 -0800592 sizeof(struct vlan_ioctl_args)))
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900593 err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 break;
595
596 default:
Patrick McHardy198a2912008-01-21 00:24:59 -0800597 err = -EOPNOTSUPP;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700598 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700599 }
Mika Kukkonen7eb1b3d2005-12-21 18:39:49 -0800600out:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700601 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 return err;
603}
604
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000605static int __net_init vlan_init_net(struct net *net)
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700606{
Eric W. Biederman946d1a92009-11-29 15:46:05 +0000607 struct vlan_net *vn = net_generic(net, vlan_net_id);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700608 int err;
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700609
Pavel Emelyanov7a17a2f2008-04-16 00:54:39 -0700610 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
611
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700612 err = vlan_proc_init(net);
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700613
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700614 return err;
615}
616
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000617static void __net_exit vlan_exit_net(struct net *net)
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700618{
Pavel Emelyanovcd1c7012008-04-16 00:51:12 -0700619 vlan_proc_cleanup(net);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700620}
621
622static struct pernet_operations vlan_net_ops = {
623 .init = vlan_init_net,
624 .exit = vlan_exit_net,
Eric W. Biederman946d1a92009-11-29 15:46:05 +0000625 .id = &vlan_net_id,
626 .size = sizeof(struct vlan_net),
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700627};
628
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800629static int __init vlan_proto_init(void)
630{
631 int err;
632
Justin Mattockda7c06c2011-05-23 20:43:48 +0000633 pr_info("%s v%s\n", vlan_fullname, vlan_version);
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800634
Eric W. Biederman91e2ff32009-12-02 13:19:08 +0000635 err = register_pernet_subsys(&vlan_net_ops);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700636 if (err < 0)
637 goto err0;
638
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800639 err = register_netdevice_notifier(&vlan_notifier_block);
640 if (err < 0)
641 goto err2;
642
Patrick McHardy70c03b42008-07-05 21:26:57 -0700643 err = vlan_gvrp_init();
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800644 if (err < 0)
645 goto err3;
646
David Ward86fbe9b2013-02-08 17:17:07 +0000647 err = vlan_mvrp_init();
Patrick McHardy70c03b42008-07-05 21:26:57 -0700648 if (err < 0)
649 goto err4;
650
David Ward86fbe9b2013-02-08 17:17:07 +0000651 err = vlan_netlink_init();
652 if (err < 0)
653 goto err5;
654
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800655 vlan_ioctl_set(vlan_ioctl_handler);
656 return 0;
657
David Ward86fbe9b2013-02-08 17:17:07 +0000658err5:
659 vlan_mvrp_uninit();
Patrick McHardy70c03b42008-07-05 21:26:57 -0700660err4:
661 vlan_gvrp_uninit();
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800662err3:
663 unregister_netdevice_notifier(&vlan_notifier_block);
664err2:
Eric W. Biederman91e2ff32009-12-02 13:19:08 +0000665 unregister_pernet_subsys(&vlan_net_ops);
Pavel Emelyanovd9ed0f02008-04-16 00:49:09 -0700666err0:
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800667 return err;
668}
669
670static void __exit vlan_cleanup_module(void)
671{
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800672 vlan_ioctl_set(NULL);
673 vlan_netlink_fini();
674
675 unregister_netdevice_notifier(&vlan_notifier_block);
676
Eric W. Biederman91e2ff32009-12-02 13:19:08 +0000677 unregister_pernet_subsys(&vlan_net_ops);
Jesper Dangaard Brouer6e327c12009-06-08 03:11:28 +0000678 rcu_barrier(); /* Wait for completion of call_rcu()'s */
Patrick McHardy70c03b42008-07-05 21:26:57 -0700679
David Ward86fbe9b2013-02-08 17:17:07 +0000680 vlan_mvrp_uninit();
Patrick McHardy70c03b42008-07-05 21:26:57 -0700681 vlan_gvrp_uninit();
Patrick McHardy69ab4b72008-01-21 00:25:15 -0800682}
683
684module_init(vlan_proto_init);
685module_exit(vlan_cleanup_module);
686
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687MODULE_LICENSE("GPL");
688MODULE_VERSION(DRV_VERSION);