Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * INET 802.1Q VLAN |
| 3 | * Ethernet-type device handling. |
| 4 | * |
| 5 | * Authors: Ben Greear <greearb@candelatech.com> |
Patrick McHardy | ad71208 | 2008-01-21 00:27:00 -0800 | [diff] [blame] | 6 | * Please send support related email to: netdev@vger.kernel.org |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html |
YOSHIFUJI Hideaki | 122952f | 2007-02-09 23:24:25 +0900 | [diff] [blame] | 8 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * 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 Perches | afab2d2 | 2011-05-26 10:58:31 +0000 | [diff] [blame] | 21 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 22 | |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 23 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/module.h> |
| 25 | #include <linux/netdevice.h> |
| 26 | #include <linux/skbuff.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 27 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/init.h> |
Franck Bui-Huu | 8252474 | 2008-05-12 21:21:05 +0200 | [diff] [blame] | 29 | #include <linux/rculist.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <net/p8022.h> |
| 31 | #include <net/arp.h> |
| 32 | #include <linux/rtnetlink.h> |
| 33 | #include <linux/notifier.h> |
Patrick McHardy | 6136276 | 2008-07-14 22:51:55 -0700 | [diff] [blame] | 34 | #include <net/rtnetlink.h> |
Eric W. Biederman | e9dc865 | 2007-09-12 13:02:17 +0200 | [diff] [blame] | 35 | #include <net/net_namespace.h> |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 36 | #include <net/netns/generic.h> |
Patrick McHardy | 6136276 | 2008-07-14 22:51:55 -0700 | [diff] [blame] | 37 | #include <asm/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
| 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 Dumazet | f99189b | 2009-11-17 10:42:49 +0000 | [diff] [blame] | 47 | int vlan_net_id __read_mostly; |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 48 | |
Stephen Hemminger | b3020061 | 2008-10-28 22:12:36 -0700 | [diff] [blame] | 49 | const char vlan_fullname[] = "802.1Q VLAN Support"; |
| 50 | const char vlan_version[] = DRV_VERSION; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | /* End of global variables definitions. */ |
| 53 | |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 54 | static int vlan_group_prealloc_vid(struct vlan_group *vg, |
| 55 | __be16 vlan_proto, u16 vlan_id) |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 56 | { |
| 57 | struct net_device **array; |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 58 | unsigned int pidx, vidx; |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 59 | unsigned int size; |
| 60 | |
| 61 | ASSERT_RTNL(); |
| 62 | |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 63 | pidx = vlan_proto_idx(vlan_proto); |
| 64 | vidx = vlan_id / VLAN_GROUP_ARRAY_PART_LEN; |
| 65 | array = vg->vlan_devices_arrays[pidx][vidx]; |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 66 | 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 McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 74 | vg->vlan_devices_arrays[pidx][vidx] = array; |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 75 | return 0; |
Patrick McHardy | 42429aa | 2007-06-13 12:05:59 -0700 | [diff] [blame] | 76 | } |
| 77 | |
Eric Dumazet | 23289a3 | 2009-10-27 07:06:36 +0000 | [diff] [blame] | 78 | void unregister_vlan_dev(struct net_device *dev, struct list_head *head) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | { |
Jiri Pirko | 7da82c0 | 2011-12-08 04:11:15 +0000 | [diff] [blame] | 80 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 81 | struct net_device *real_dev = vlan->real_dev; |
Jiri Pirko | 5b9ea6e | 2011-12-08 04:11:18 +0000 | [diff] [blame] | 82 | struct vlan_info *vlan_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | struct vlan_group *grp; |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 84 | u16 vlan_id = vlan->vlan_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
| 86 | ASSERT_RTNL(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
Jiri Pirko | 5b9ea6e | 2011-12-08 04:11:18 +0000 | [diff] [blame] | 88 | vlan_info = rtnl_dereference(real_dev->vlan_info); |
| 89 | BUG_ON(!vlan_info); |
| 90 | |
| 91 | grp = &vlan_info->grp; |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 92 | |
Jiri Pirko | 5b9ea6e | 2011-12-08 04:11:18 +0000 | [diff] [blame] | 93 | grp->nr_vlan_devs--; |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 94 | |
David Ward | 86fbe9b | 2013-02-08 17:17:07 +0000 | [diff] [blame] | 95 | if (vlan->flags & VLAN_FLAG_MVRP) |
| 96 | vlan_mvrp_request_leave(dev); |
Eric Dumazet | 55aee10 | 2011-05-10 12:22:54 -0700 | [diff] [blame] | 97 | if (vlan->flags & VLAN_FLAG_GVRP) |
| 98 | vlan_gvrp_request_leave(dev); |
| 99 | |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 100 | vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL); |
Veaceslav Falico | 47701a3 | 2013-09-25 09:20:30 +0200 | [diff] [blame] | 101 | |
| 102 | netdev_upper_dev_unlink(real_dev, dev); |
Eric Dumazet | 48752e1 | 2011-05-09 04:40:44 +0000 | [diff] [blame] | 103 | /* 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 Dumazet | 23289a3 | 2009-10-27 07:06:36 +0000 | [diff] [blame] | 107 | unregister_netdevice_queue(dev, head); |
Patrick McHardy | ce30500 | 2008-07-05 21:26:41 -0700 | [diff] [blame] | 108 | |
David Ward | 86fbe9b | 2013-02-08 17:17:07 +0000 | [diff] [blame] | 109 | if (grp->nr_vlan_devs == 0) { |
| 110 | vlan_mvrp_uninit_applicant(real_dev); |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 111 | vlan_gvrp_uninit_applicant(real_dev); |
David Ward | 86fbe9b | 2013-02-08 17:17:07 +0000 | [diff] [blame] | 112 | } |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 113 | |
Cong Wang | 4a7df34 | 2013-03-22 19:14:07 +0000 | [diff] [blame] | 114 | /* 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 McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 119 | vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); |
Cong Wang | 4a7df34 | 2013-03-22 19:14:07 +0000 | [diff] [blame] | 120 | |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 121 | /* Get rid of the vlan's reference to real_dev */ |
| 122 | dev_put(real_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | } |
| 124 | |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 125 | int vlan_check_real_dev(struct net_device *real_dev, |
| 126 | __be16 protocol, u16 vlan_id) |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 127 | { |
Stephen Hemminger | 656299f | 2008-11-19 21:53:47 -0800 | [diff] [blame] | 128 | const char *name = real_dev->name; |
Patrick McHardy | 40f98e1 | 2008-01-21 00:24:30 -0800 | [diff] [blame] | 129 | |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 130 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
Joe Perches | afab2d2 | 2011-05-26 10:58:31 +0000 | [diff] [blame] | 131 | pr_info("VLANs not supported on %s\n", name); |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 132 | return -EOPNOTSUPP; |
| 133 | } |
| 134 | |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 135 | if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL) |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 136 | return -EEXIST; |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 137 | |
| 138 | return 0; |
| 139 | } |
| 140 | |
Patrick McHardy | 07b5b17 | 2007-06-13 12:07:54 -0700 | [diff] [blame] | 141 | int register_vlan_dev(struct net_device *dev) |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 142 | { |
Jiri Pirko | 7da82c0 | 2011-12-08 04:11:15 +0000 | [diff] [blame] | 143 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 144 | struct net_device *real_dev = vlan->real_dev; |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 145 | u16 vlan_id = vlan->vlan_id; |
Jiri Pirko | 5b9ea6e | 2011-12-08 04:11:18 +0000 | [diff] [blame] | 146 | struct vlan_info *vlan_info; |
| 147 | struct vlan_group *grp; |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 148 | int err; |
| 149 | |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 150 | err = vlan_vid_add(real_dev, vlan->vlan_proto, vlan_id); |
Jiri Pirko | 5b9ea6e | 2011-12-08 04:11:18 +0000 | [diff] [blame] | 151 | 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 McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 160 | err = vlan_gvrp_init_applicant(real_dev); |
| 161 | if (err < 0) |
Jiri Pirko | 5b9ea6e | 2011-12-08 04:11:18 +0000 | [diff] [blame] | 162 | goto out_vid_del; |
David Ward | 86fbe9b | 2013-02-08 17:17:07 +0000 | [diff] [blame] | 163 | err = vlan_mvrp_init_applicant(real_dev); |
| 164 | if (err < 0) |
| 165 | goto out_uninit_gvrp; |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 166 | } |
| 167 | |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 168 | err = vlan_group_prealloc_vid(grp, vlan->vlan_proto, vlan_id); |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 169 | if (err < 0) |
David Ward | 86fbe9b | 2013-02-08 17:17:07 +0000 | [diff] [blame] | 170 | goto out_uninit_mvrp; |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 171 | |
Vlad Yasevich | d38569a | 2014-05-16 17:04:55 -0400 | [diff] [blame] | 172 | vlan->nest_level = dev_get_nest_level(real_dev, is_vlan_dev) + 1; |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 173 | err = register_netdevice(dev); |
| 174 | if (err < 0) |
Veaceslav Falico | 5df27e6 | 2013-09-25 09:20:29 +0200 | [diff] [blame] | 175 | goto out_uninit_mvrp; |
| 176 | |
| 177 | err = netdev_upper_dev_link(real_dev, dev); |
| 178 | if (err) |
| 179 | goto out_unregister_netdev; |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 180 | |
Jiri Pirko | 7da82c0 | 2011-12-08 04:11:15 +0000 | [diff] [blame] | 181 | /* Account for reference in struct vlan_dev_priv */ |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 182 | dev_hold(real_dev); |
| 183 | |
Patrick Mullaney | fc4a748 | 2009-12-03 15:59:22 -0800 | [diff] [blame] | 184 | netif_stacked_transfer_operstate(real_dev, dev); |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 185 | 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 McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 190 | vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev); |
Jiri Pirko | 5b9ea6e | 2011-12-08 04:11:18 +0000 | [diff] [blame] | 191 | grp->nr_vlan_devs++; |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 192 | |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 193 | return 0; |
| 194 | |
Veaceslav Falico | 5df27e6 | 2013-09-25 09:20:29 +0200 | [diff] [blame] | 195 | out_unregister_netdev: |
| 196 | unregister_netdevice(dev); |
David Ward | 86fbe9b | 2013-02-08 17:17:07 +0000 | [diff] [blame] | 197 | out_uninit_mvrp: |
| 198 | if (grp->nr_vlan_devs == 0) |
| 199 | vlan_mvrp_uninit_applicant(real_dev); |
| 200 | out_uninit_gvrp: |
Jiri Pirko | 5b9ea6e | 2011-12-08 04:11:18 +0000 | [diff] [blame] | 201 | if (grp->nr_vlan_devs == 0) |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 202 | vlan_gvrp_uninit_applicant(real_dev); |
Jiri Pirko | 5b9ea6e | 2011-12-08 04:11:18 +0000 | [diff] [blame] | 203 | out_vid_del: |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 204 | vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 205 | return err; |
| 206 | } |
| 207 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 209 | * Returns 0 if the device was created or a negative error code otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 211 | static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | struct net_device *new_dev; |
Wang Sheng-Hui | 0c0667a | 2013-08-03 16:54:50 +0800 | [diff] [blame] | 214 | struct vlan_dev_priv *vlan; |
Pavel Emelyanov | 7a17a2f | 2008-04-16 00:54:39 -0700 | [diff] [blame] | 215 | struct net *net = dev_net(real_dev); |
| 216 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | char name[IFNAMSIZ]; |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 218 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 220 | if (vlan_id >= VLAN_VID_MASK) |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 221 | return -ERANGE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 223 | err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id); |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 224 | if (err < 0) |
| 225 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
| 227 | /* Gotta set up the fields for the device. */ |
Pavel Emelyanov | 7a17a2f | 2008-04-16 00:54:39 -0700 | [diff] [blame] | 228 | switch (vn->name_type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
| 230 | /* name will look like: eth1.0005 */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 231 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | 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 McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 237 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | 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 McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 243 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | 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 McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 250 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 251 | } |
YOSHIFUJI Hideaki | 122952f | 2007-02-09 23:24:25 +0900 | [diff] [blame] | 252 | |
Jiri Pirko | 7da82c0 | 2011-12-08 04:11:15 +0000 | [diff] [blame] | 253 | new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, vlan_setup); |
Arjan van de Ven | 5dd8d1e | 2006-07-03 00:25:33 -0700 | [diff] [blame] | 254 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | if (new_dev == NULL) |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 256 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
Pavel Emelyanov | 65d292a | 2008-04-16 00:55:06 -0700 | [diff] [blame] | 258 | dev_net_set(new_dev, net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | /* 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 Zou | 6e22ce2 | 2012-11-28 13:45:24 +0000 | [diff] [blame] | 263 | new_dev->priv_flags |= (real_dev->priv_flags & IFF_UNICAST_FLT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | |
Wang Sheng-Hui | 0c0667a | 2013-08-03 16:54:50 +0800 | [diff] [blame] | 265 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
Patrick McHardy | 07b5b17 | 2007-06-13 12:07:54 -0700 | [diff] [blame] | 272 | new_dev->rtnl_link_ops = &vlan_link_ops; |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 273 | err = register_vlan_dev(new_dev); |
| 274 | if (err < 0) |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 275 | goto out_free_newdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 277 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | out_free_newdev: |
| 280 | free_netdev(new_dev); |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 281 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | } |
| 283 | |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 284 | static void vlan_sync_address(struct net_device *dev, |
| 285 | struct net_device *vlandev) |
| 286 | { |
Jiri Pirko | 7da82c0 | 2011-12-08 04:11:15 +0000 | [diff] [blame] | 287 | struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 288 | |
| 289 | /* May be called without an actual change */ |
Joe Perches | 53a2b3a | 2012-05-08 18:56:47 +0000 | [diff] [blame] | 290 | if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr)) |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 291 | return; |
| 292 | |
| 293 | /* vlan address was different from the old address and is equal to |
| 294 | * the new address */ |
Joe Perches | 53a2b3a | 2012-05-08 18:56:47 +0000 | [diff] [blame] | 295 | if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && |
| 296 | ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 297 | dev_uc_del(dev, vlandev->dev_addr); |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 298 | |
| 299 | /* vlan address was equal to the old address and is different from |
| 300 | * the new address */ |
Joe Perches | 53a2b3a | 2012-05-08 18:56:47 +0000 | [diff] [blame] | 301 | if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && |
| 302 | !ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 303 | dev_uc_add(dev, vlandev->dev_addr); |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 304 | |
Joe Perches | 07fc67b | 2014-01-20 09:52:14 -0800 | [diff] [blame] | 305 | ether_addr_copy(vlan->real_dev_addr, dev->dev_addr); |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 306 | } |
| 307 | |
Patrick McHardy | 5fb1357 | 2008-05-20 14:54:50 -0700 | [diff] [blame] | 308 | static void vlan_transfer_features(struct net_device *dev, |
| 309 | struct net_device *vlandev) |
| 310 | { |
Vlad Yasevich | fc0d48b | 2014-03-26 11:47:56 -0400 | [diff] [blame] | 311 | struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); |
| 312 | |
Alexander Duyck | 1ae4be2 | 2008-09-11 20:17:05 -0700 | [diff] [blame] | 313 | vlandev->gso_max_size = dev->gso_max_size; |
John Fastabend | 029f5fc | 2010-10-30 14:22:32 +0000 | [diff] [blame] | 314 | |
Vlad Yasevich | fc0d48b | 2014-03-26 11:47:56 -0400 | [diff] [blame] | 315 | if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto)) |
John Fastabend | 029f5fc | 2010-10-30 14:22:32 +0000 | [diff] [blame] | 316 | vlandev->hard_header_len = dev->hard_header_len; |
| 317 | else |
| 318 | vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; |
| 319 | |
Amerigo Wang | f4d5392 | 2012-10-29 17:22:28 +0000 | [diff] [blame] | 320 | #if IS_ENABLED(CONFIG_FCOE) |
Vasu Dev | b85daa5 | 2009-08-14 12:41:07 +0000 | [diff] [blame] | 321 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; |
| 322 | #endif |
Michał Mirosław | 8a0427b | 2011-04-02 22:49:12 -0700 | [diff] [blame] | 323 | |
| 324 | netdev_update_features(vlandev); |
Patrick McHardy | 5fb1357 | 2008-05-20 14:54:50 -0700 | [diff] [blame] | 325 | } |
| 326 | |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 327 | static 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 Perches | afab2d2 | 2011-05-26 10:58:31 +0000 | [diff] [blame] | 333 | pr_warn("failed to change proc name for %s\n", |
| 334 | dev->name); |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 335 | break; |
Pavel Emelyanov | 30688a9 | 2008-04-16 00:57:01 -0700 | [diff] [blame] | 336 | case NETDEV_REGISTER: |
| 337 | if (vlan_proc_add_dev(dev) < 0) |
Joe Perches | afab2d2 | 2011-05-26 10:58:31 +0000 | [diff] [blame] | 338 | pr_warn("failed to add proc entry for %s\n", dev->name); |
Pavel Emelyanov | 30688a9 | 2008-04-16 00:57:01 -0700 | [diff] [blame] | 339 | break; |
| 340 | case NETDEV_UNREGISTER: |
| 341 | vlan_proc_rem_dev(dev); |
| 342 | break; |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 343 | } |
| 344 | } |
| 345 | |
Patrick McHardy | 2029cc2 | 2008-01-21 00:26:41 -0800 | [diff] [blame] | 346 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
| 347 | void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | { |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 349 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 350 | struct vlan_group *grp; |
Jiri Pirko | 5b9ea6e | 2011-12-08 04:11:18 +0000 | [diff] [blame] | 351 | struct vlan_info *vlan_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | int i, flgs; |
| 353 | struct net_device *vlandev; |
Jiri Pirko | 7da82c0 | 2011-12-08 04:11:15 +0000 | [diff] [blame] | 354 | struct vlan_dev_priv *vlan; |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 355 | bool last = false; |
Patrick McHardy | 29906f6 | 2009-10-29 23:43:00 -0700 | [diff] [blame] | 356 | LIST_HEAD(list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | |
Patrick McHardy | 81d8534 | 2008-05-20 14:37:36 -0700 | [diff] [blame] | 358 | if (is_vlan_dev(dev)) |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 359 | __vlan_device_event(dev, event); |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 360 | |
Pedro Garcia | ad1afb0 | 2010-07-18 15:38:44 -0700 | [diff] [blame] | 361 | if ((event == NETDEV_UP) && |
Patrick McHardy | f646968 | 2013-04-19 02:04:27 +0000 | [diff] [blame] | 362 | (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { |
Joe Perches | afab2d2 | 2011-05-26 10:58:31 +0000 | [diff] [blame] | 363 | pr_info("adding VLAN 0 to HW filter on device %s\n", |
Pedro Garcia | ad1afb0 | 2010-07-18 15:38:44 -0700 | [diff] [blame] | 364 | dev->name); |
Patrick McHardy | 80d5c36 | 2013-04-19 02:04:28 +0000 | [diff] [blame] | 365 | vlan_vid_add(dev, htons(ETH_P_8021Q), 0); |
Pedro Garcia | ad1afb0 | 2010-07-18 15:38:44 -0700 | [diff] [blame] | 366 | } |
| 367 | |
Jiri Pirko | 5b9ea6e | 2011-12-08 04:11:18 +0000 | [diff] [blame] | 368 | vlan_info = rtnl_dereference(dev->vlan_info); |
| 369 | if (!vlan_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | goto out; |
Jiri Pirko | 5b9ea6e | 2011-12-08 04:11:18 +0000 | [diff] [blame] | 371 | grp = &vlan_info->grp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | |
| 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 McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 380 | vlan_group_for_each_dev(grp, i, vlandev) |
Patrick Mullaney | fc4a748 | 2009-12-03 15:59:22 -0800 | [diff] [blame] | 381 | netif_stacked_transfer_operstate(dev, vlandev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | break; |
| 383 | |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 384 | case NETDEV_CHANGEADDR: |
| 385 | /* Adjust unicast filters on underlying device */ |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 386 | vlan_group_for_each_dev(grp, i, vlandev) { |
Patrick McHardy | d932e04 | 2007-11-10 21:51:40 -0800 | [diff] [blame] | 387 | flgs = vlandev->flags; |
| 388 | if (!(flgs & IFF_UP)) |
| 389 | continue; |
| 390 | |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 391 | vlan_sync_address(dev, vlandev); |
| 392 | } |
| 393 | break; |
| 394 | |
Herbert Xu | 2e477c9 | 2009-07-20 07:35:37 -0700 | [diff] [blame] | 395 | case NETDEV_CHANGEMTU: |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 396 | vlan_group_for_each_dev(grp, i, vlandev) { |
Herbert Xu | 2e477c9 | 2009-07-20 07:35:37 -0700 | [diff] [blame] | 397 | if (vlandev->mtu <= dev->mtu) |
| 398 | continue; |
| 399 | |
| 400 | dev_set_mtu(vlandev, dev->mtu); |
| 401 | } |
| 402 | break; |
| 403 | |
Patrick McHardy | 5fb1357 | 2008-05-20 14:54:50 -0700 | [diff] [blame] | 404 | case NETDEV_FEAT_CHANGE: |
| 405 | /* Propagate device features to underlying device */ |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 406 | vlan_group_for_each_dev(grp, i, vlandev) |
Patrick McHardy | 5fb1357 | 2008-05-20 14:54:50 -0700 | [diff] [blame] | 407 | vlan_transfer_features(dev, vlandev); |
Patrick McHardy | 5fb1357 | 2008-05-20 14:54:50 -0700 | [diff] [blame] | 408 | break; |
| 409 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | case NETDEV_DOWN: |
Patrick McHardy | f646968 | 2013-04-19 02:04:27 +0000 | [diff] [blame] | 411 | if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER) |
Patrick McHardy | 80d5c36 | 2013-04-19 02:04:28 +0000 | [diff] [blame] | 412 | vlan_vid_del(dev, htons(ETH_P_8021Q), 0); |
Amir Hanania | efc73f4 | 2012-07-09 20:47:19 +0000 | [diff] [blame] | 413 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | /* Put all VLANs for this dev in the down state too. */ |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 415 | vlan_group_for_each_dev(grp, i, vlandev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | flgs = vlandev->flags; |
| 417 | if (!(flgs & IFF_UP)) |
| 418 | continue; |
| 419 | |
Jiri Pirko | 7da82c0 | 2011-12-08 04:11:15 +0000 | [diff] [blame] | 420 | vlan = vlan_dev_priv(vlandev); |
Patrick McHardy | 5e75659 | 2009-11-25 07:54:54 +0000 | [diff] [blame] | 421 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
| 422 | dev_change_flags(vlandev, flgs & ~IFF_UP); |
Patrick Mullaney | fc4a748 | 2009-12-03 15:59:22 -0800 | [diff] [blame] | 423 | netif_stacked_transfer_operstate(dev, vlandev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | } |
| 425 | break; |
| 426 | |
| 427 | case NETDEV_UP: |
| 428 | /* Put all VLANs for this dev in the up state too. */ |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 429 | vlan_group_for_each_dev(grp, i, vlandev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | flgs = vlandev->flags; |
| 431 | if (flgs & IFF_UP) |
| 432 | continue; |
| 433 | |
Jiri Pirko | 7da82c0 | 2011-12-08 04:11:15 +0000 | [diff] [blame] | 434 | vlan = vlan_dev_priv(vlandev); |
Patrick McHardy | 5e75659 | 2009-11-25 07:54:54 +0000 | [diff] [blame] | 435 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
| 436 | dev_change_flags(vlandev, flgs | IFF_UP); |
Patrick Mullaney | fc4a748 | 2009-12-03 15:59:22 -0800 | [diff] [blame] | 437 | netif_stacked_transfer_operstate(dev, vlandev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | } |
| 439 | break; |
YOSHIFUJI Hideaki | 122952f | 2007-02-09 23:24:25 +0900 | [diff] [blame] | 440 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | case NETDEV_UNREGISTER: |
David Lamparter | 3b27e10 | 2010-09-17 03:22:19 +0000 | [diff] [blame] | 442 | /* twiddle thumbs on netns device moves */ |
| 443 | if (dev->reg_state != NETREG_UNREGISTERING) |
| 444 | break; |
| 445 | |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 446 | vlan_group_for_each_dev(grp, i, vlandev) { |
Jiri Pirko | 5b9ea6e | 2011-12-08 04:11:18 +0000 | [diff] [blame] | 447 | /* removal of last vid destroys vlan_info, abort |
Patrick McHardy | 29906f6 | 2009-10-29 23:43:00 -0700 | [diff] [blame] | 448 | * afterwards */ |
Jiri Pirko | 5b9ea6e | 2011-12-08 04:11:18 +0000 | [diff] [blame] | 449 | if (vlan_info->nr_vids == 1) |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 450 | last = true; |
Patrick McHardy | 29906f6 | 2009-10-29 23:43:00 -0700 | [diff] [blame] | 451 | |
| 452 | unregister_vlan_dev(vlandev, &list); |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 453 | if (last) |
| 454 | break; |
Patrick McHardy | 29906f6 | 2009-10-29 23:43:00 -0700 | [diff] [blame] | 455 | } |
| 456 | unregister_netdevice_many(&list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | break; |
Jiri Pirko | 1c01fe1 | 2010-03-10 10:30:19 +0000 | [diff] [blame] | 458 | |
| 459 | case NETDEV_PRE_TYPE_CHANGE: |
| 460 | /* Forbid underlaying device to change its type. */ |
Jiri Pirko | 18c22a0 | 2012-10-17 01:37:36 +0000 | [diff] [blame] | 461 | if (vlan_uses_dev(dev)) |
| 462 | return NOTIFY_BAD; |
| 463 | break; |
Ben Hutchings | 9960647 | 2011-04-15 13:46:49 +0000 | [diff] [blame] | 464 | |
| 465 | case NETDEV_NOTIFY_PEERS: |
Ben Hutchings | 7c89943 | 2011-04-15 13:47:51 +0000 | [diff] [blame] | 466 | case NETDEV_BONDING_FAILOVER: |
Jiri Pirko | 4aa5dee | 2013-07-20 12:13:53 +0200 | [diff] [blame] | 467 | case NETDEV_RESEND_IGMP: |
Ben Hutchings | 9960647 | 2011-04-15 13:46:49 +0000 | [diff] [blame] | 468 | /* Propagate to vlan devices */ |
Patrick McHardy | 1fd9b1f | 2013-04-19 02:04:29 +0000 | [diff] [blame] | 469 | vlan_group_for_each_dev(grp, i, vlandev) |
Ben Hutchings | 7c89943 | 2011-04-15 13:47:51 +0000 | [diff] [blame] | 470 | call_netdevice_notifiers(event, vlandev); |
Ben Hutchings | 9960647 | 2011-04-15 13:46:49 +0000 | [diff] [blame] | 471 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 472 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | |
| 474 | out: |
| 475 | return NOTIFY_DONE; |
| 476 | } |
| 477 | |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 478 | static struct notifier_block vlan_notifier_block __read_mostly = { |
| 479 | .notifier_call = vlan_device_event, |
| 480 | }; |
| 481 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | /* |
| 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. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 487 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | { |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 489 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | struct vlan_ioctl_args args; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 491 | struct net_device *dev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | |
| 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 McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 500 | rtnl_lock(); |
| 501 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | switch (args.cmd) { |
| 503 | case SET_VLAN_INGRESS_PRIORITY_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 504 | 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 Emelyanov | 65d292a | 2008-04-16 00:55:06 -0700 | [diff] [blame] | 511 | dev = __dev_get_by_name(net, args.device1); |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 512 | if (!dev) |
| 513 | goto out; |
| 514 | |
| 515 | err = -EINVAL; |
Joonwoo Park | 26a2523 | 2008-07-08 03:22:16 -0700 | [diff] [blame] | 516 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 517 | goto out; |
| 518 | } |
| 519 | |
| 520 | switch (args.cmd) { |
| 521 | case SET_VLAN_INGRESS_PRIORITY_CMD: |
| 522 | err = -EPERM; |
Eric W. Biederman | 276996f | 2012-11-16 03:03:09 +0000 | [diff] [blame] | 523 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 524 | break; |
| 525 | vlan_dev_set_ingress_priority(dev, |
| 526 | args.u.skb_priority, |
| 527 | args.vlan_qos); |
Patrick McHardy | fffe470 | 2007-11-07 01:31:32 -0800 | [diff] [blame] | 528 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | break; |
| 530 | |
| 531 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 532 | err = -EPERM; |
Eric W. Biederman | 276996f | 2012-11-16 03:03:09 +0000 | [diff] [blame] | 533 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 534 | break; |
| 535 | err = vlan_dev_set_egress_priority(dev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | args.u.skb_priority, |
| 537 | args.vlan_qos); |
| 538 | break; |
| 539 | |
| 540 | case SET_VLAN_FLAG_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 541 | err = -EPERM; |
Eric W. Biederman | 276996f | 2012-11-16 03:03:09 +0000 | [diff] [blame] | 542 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 543 | break; |
Patrick McHardy | b3ce032 | 2008-07-05 21:26:27 -0700 | [diff] [blame] | 544 | err = vlan_dev_change_flags(dev, |
| 545 | args.vlan_qos ? args.u.flag : 0, |
| 546 | args.u.flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | break; |
| 548 | |
| 549 | case SET_VLAN_NAME_TYPE_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 550 | err = -EPERM; |
Eric W. Biederman | 276996f | 2012-11-16 03:03:09 +0000 | [diff] [blame] | 551 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Pavel Emelyanov | e35de02 | 2007-12-06 22:52:16 -0800 | [diff] [blame] | 552 | break; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 553 | if ((args.u.name_type >= 0) && |
| 554 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { |
Pavel Emelyanov | 7a17a2f | 2008-04-16 00:54:39 -0700 | [diff] [blame] | 555 | struct vlan_net *vn; |
| 556 | |
| 557 | vn = net_generic(net, vlan_net_id); |
| 558 | vn->name_type = args.u.name_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | err = 0; |
| 560 | } else { |
| 561 | err = -EINVAL; |
| 562 | } |
| 563 | break; |
| 564 | |
| 565 | case ADD_VLAN_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 566 | err = -EPERM; |
Eric W. Biederman | 276996f | 2012-11-16 03:03:09 +0000 | [diff] [blame] | 567 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 568 | break; |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 569 | err = register_vlan_device(dev, args.u.VID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | break; |
| 571 | |
| 572 | case DEL_VLAN_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 573 | err = -EPERM; |
Eric W. Biederman | 276996f | 2012-11-16 03:03:09 +0000 | [diff] [blame] | 574 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 575 | break; |
Eric Dumazet | 23289a3 | 2009-10-27 07:06:36 +0000 | [diff] [blame] | 576 | unregister_vlan_dev(dev, NULL); |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 577 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | break; |
| 579 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | case GET_VLAN_REALDEV_NAME_CMD: |
Andrew Morton | 3f5f434 | 2007-07-24 15:37:11 -0700 | [diff] [blame] | 581 | err = 0; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 582 | vlan_dev_get_realdev_name(dev, args.u.device2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | if (copy_to_user(arg, &args, |
Patrick McHardy | 2029cc2 | 2008-01-21 00:26:41 -0800 | [diff] [blame] | 584 | sizeof(struct vlan_ioctl_args))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | err = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | break; |
| 587 | |
| 588 | case GET_VLAN_VID_CMD: |
Andrew Morton | 3f5f434 | 2007-07-24 15:37:11 -0700 | [diff] [blame] | 589 | err = 0; |
Patrick McHardy | 22d1ba7 | 2008-07-08 03:23:57 -0700 | [diff] [blame] | 590 | args.u.VID = vlan_dev_vlan_id(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | if (copy_to_user(arg, &args, |
Patrick McHardy | 2029cc2 | 2008-01-21 00:26:41 -0800 | [diff] [blame] | 592 | sizeof(struct vlan_ioctl_args))) |
YOSHIFUJI Hideaki | 122952f | 2007-02-09 23:24:25 +0900 | [diff] [blame] | 593 | err = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | break; |
| 595 | |
| 596 | default: |
Patrick McHardy | 198a291 | 2008-01-21 00:24:59 -0800 | [diff] [blame] | 597 | err = -EOPNOTSUPP; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 598 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 599 | } |
Mika Kukkonen | 7eb1b3d | 2005-12-21 18:39:49 -0800 | [diff] [blame] | 600 | out: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 601 | rtnl_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | return err; |
| 603 | } |
| 604 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 605 | static int __net_init vlan_init_net(struct net *net) |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 606 | { |
Eric W. Biederman | 946d1a9 | 2009-11-29 15:46:05 +0000 | [diff] [blame] | 607 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 608 | int err; |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 609 | |
Pavel Emelyanov | 7a17a2f | 2008-04-16 00:54:39 -0700 | [diff] [blame] | 610 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
| 611 | |
Pavel Emelyanov | cd1c701 | 2008-04-16 00:51:12 -0700 | [diff] [blame] | 612 | err = vlan_proc_init(net); |
Pavel Emelyanov | cd1c701 | 2008-04-16 00:51:12 -0700 | [diff] [blame] | 613 | |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 614 | return err; |
| 615 | } |
| 616 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 617 | static void __net_exit vlan_exit_net(struct net *net) |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 618 | { |
Pavel Emelyanov | cd1c701 | 2008-04-16 00:51:12 -0700 | [diff] [blame] | 619 | vlan_proc_cleanup(net); |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 620 | } |
| 621 | |
| 622 | static struct pernet_operations vlan_net_ops = { |
| 623 | .init = vlan_init_net, |
| 624 | .exit = vlan_exit_net, |
Eric W. Biederman | 946d1a9 | 2009-11-29 15:46:05 +0000 | [diff] [blame] | 625 | .id = &vlan_net_id, |
| 626 | .size = sizeof(struct vlan_net), |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 627 | }; |
| 628 | |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 629 | static int __init vlan_proto_init(void) |
| 630 | { |
| 631 | int err; |
| 632 | |
Justin Mattock | da7c06c | 2011-05-23 20:43:48 +0000 | [diff] [blame] | 633 | pr_info("%s v%s\n", vlan_fullname, vlan_version); |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 634 | |
Eric W. Biederman | 91e2ff3 | 2009-12-02 13:19:08 +0000 | [diff] [blame] | 635 | err = register_pernet_subsys(&vlan_net_ops); |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 636 | if (err < 0) |
| 637 | goto err0; |
| 638 | |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 639 | err = register_netdevice_notifier(&vlan_notifier_block); |
| 640 | if (err < 0) |
| 641 | goto err2; |
| 642 | |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 643 | err = vlan_gvrp_init(); |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 644 | if (err < 0) |
| 645 | goto err3; |
| 646 | |
David Ward | 86fbe9b | 2013-02-08 17:17:07 +0000 | [diff] [blame] | 647 | err = vlan_mvrp_init(); |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 648 | if (err < 0) |
| 649 | goto err4; |
| 650 | |
David Ward | 86fbe9b | 2013-02-08 17:17:07 +0000 | [diff] [blame] | 651 | err = vlan_netlink_init(); |
| 652 | if (err < 0) |
| 653 | goto err5; |
| 654 | |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 655 | vlan_ioctl_set(vlan_ioctl_handler); |
| 656 | return 0; |
| 657 | |
David Ward | 86fbe9b | 2013-02-08 17:17:07 +0000 | [diff] [blame] | 658 | err5: |
| 659 | vlan_mvrp_uninit(); |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 660 | err4: |
| 661 | vlan_gvrp_uninit(); |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 662 | err3: |
| 663 | unregister_netdevice_notifier(&vlan_notifier_block); |
| 664 | err2: |
Eric W. Biederman | 91e2ff3 | 2009-12-02 13:19:08 +0000 | [diff] [blame] | 665 | unregister_pernet_subsys(&vlan_net_ops); |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 666 | err0: |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 667 | return err; |
| 668 | } |
| 669 | |
| 670 | static void __exit vlan_cleanup_module(void) |
| 671 | { |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 672 | vlan_ioctl_set(NULL); |
| 673 | vlan_netlink_fini(); |
| 674 | |
| 675 | unregister_netdevice_notifier(&vlan_notifier_block); |
| 676 | |
Eric W. Biederman | 91e2ff3 | 2009-12-02 13:19:08 +0000 | [diff] [blame] | 677 | unregister_pernet_subsys(&vlan_net_ops); |
Jesper Dangaard Brouer | 6e327c1 | 2009-06-08 03:11:28 +0000 | [diff] [blame] | 678 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 679 | |
David Ward | 86fbe9b | 2013-02-08 17:17:07 +0000 | [diff] [blame] | 680 | vlan_mvrp_uninit(); |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 681 | vlan_gvrp_uninit(); |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 682 | } |
| 683 | |
| 684 | module_init(vlan_proto_init); |
| 685 | module_exit(vlan_cleanup_module); |
| 686 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | MODULE_LICENSE("GPL"); |
| 688 | MODULE_VERSION(DRV_VERSION); |