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 | |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 54 | static void vlan_group_free(struct vlan_group *grp) |
| 55 | { |
| 56 | int i; |
| 57 | |
Patrick McHardy | 2029cc2 | 2008-01-21 00:26:41 -0800 | [diff] [blame] | 58 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 59 | kfree(grp->vlan_devices_arrays[i]); |
| 60 | kfree(grp); |
| 61 | } |
| 62 | |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 63 | static struct vlan_group *vlan_group_alloc(struct net_device *real_dev) |
Patrick McHardy | 42429aa | 2007-06-13 12:05:59 -0700 | [diff] [blame] | 64 | { |
| 65 | struct vlan_group *grp; |
Patrick McHardy | 42429aa | 2007-06-13 12:05:59 -0700 | [diff] [blame] | 66 | |
| 67 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); |
| 68 | if (!grp) |
| 69 | return NULL; |
| 70 | |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 71 | grp->real_dev = real_dev; |
Patrick McHardy | 42429aa | 2007-06-13 12:05:59 -0700 | [diff] [blame] | 72 | return grp; |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 73 | } |
Patrick McHardy | 42429aa | 2007-06-13 12:05:59 -0700 | [diff] [blame] | 74 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 75 | static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id) |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 76 | { |
| 77 | struct net_device **array; |
| 78 | unsigned int size; |
| 79 | |
| 80 | ASSERT_RTNL(); |
| 81 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 82 | array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 83 | if (array != NULL) |
| 84 | return 0; |
| 85 | |
| 86 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; |
| 87 | array = kzalloc(size, GFP_KERNEL); |
| 88 | if (array == NULL) |
| 89 | return -ENOBUFS; |
| 90 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 91 | vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array; |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 92 | return 0; |
Patrick McHardy | 42429aa | 2007-06-13 12:05:59 -0700 | [diff] [blame] | 93 | } |
| 94 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | static void vlan_rcu_free(struct rcu_head *rcu) |
| 96 | { |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 97 | vlan_group_free(container_of(rcu, struct vlan_group, rcu)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | } |
| 99 | |
Eric Dumazet | 23289a3 | 2009-10-27 07:06:36 +0000 | [diff] [blame] | 100 | void unregister_vlan_dev(struct net_device *dev, struct list_head *head) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | { |
Patrick McHardy | 9dfebcc | 2008-01-21 00:26:07 -0800 | [diff] [blame] | 102 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 103 | struct net_device *real_dev = vlan->real_dev; |
Stephen Hemminger | 656299f | 2008-11-19 21:53:47 -0800 | [diff] [blame] | 104 | const struct net_device_ops *ops = real_dev->netdev_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | struct vlan_group *grp; |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 106 | u16 vlan_id = vlan->vlan_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
| 108 | ASSERT_RTNL(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | |
Eric Dumazet | b616b09 | 2010-10-24 21:31:58 +0000 | [diff] [blame] | 110 | grp = rtnl_dereference(real_dev->vlgrp); |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 111 | BUG_ON(!grp); |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 112 | |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 113 | /* Take it out of our own structures, but be sure to interlock with |
Pedro Garcia | ad1afb0 | 2010-07-18 15:38:44 -0700 | [diff] [blame] | 114 | * HW accelerating devices or SW vlan input packet processing if |
| 115 | * VLAN is not 0 (leave it there for 802.1p). |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 116 | */ |
Pedro Garcia | ad1afb0 | 2010-07-18 15:38:44 -0700 | [diff] [blame] | 117 | if (vlan_id && (real_dev->features & NETIF_F_HW_VLAN_FILTER)) |
Stephen Hemminger | 656299f | 2008-11-19 21:53:47 -0800 | [diff] [blame] | 118 | ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id); |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 119 | |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 120 | grp->nr_vlans--; |
| 121 | |
Eric Dumazet | 55aee10 | 2011-05-10 12:22:54 -0700 | [diff] [blame] | 122 | if (vlan->flags & VLAN_FLAG_GVRP) |
| 123 | vlan_gvrp_request_leave(dev); |
| 124 | |
Patrick McHardy | 29906f6 | 2009-10-29 23:43:00 -0700 | [diff] [blame] | 125 | vlan_group_set_device(grp, vlan_id, NULL); |
Eric Dumazet | 48752e1 | 2011-05-09 04:40:44 +0000 | [diff] [blame] | 126 | /* Because unregister_netdevice_queue() makes sure at least one rcu |
| 127 | * grace period is respected before device freeing, |
| 128 | * we dont need to call synchronize_net() here. |
| 129 | */ |
Eric Dumazet | 23289a3 | 2009-10-27 07:06:36 +0000 | [diff] [blame] | 130 | unregister_netdevice_queue(dev, head); |
Patrick McHardy | ce30500 | 2008-07-05 21:26:41 -0700 | [diff] [blame] | 131 | |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 132 | /* If the group is now empty, kill off the group. */ |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 133 | if (grp->nr_vlans == 0) { |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 134 | vlan_gvrp_uninit_applicant(real_dev); |
| 135 | |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 136 | RCU_INIT_POINTER(real_dev->vlgrp, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 138 | /* Free the group, after all cpu's are done. */ |
| 139 | call_rcu(&grp->rcu, vlan_rcu_free); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | } |
| 141 | |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 142 | /* Get rid of the vlan's reference to real_dev */ |
| 143 | dev_put(real_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | } |
| 145 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 146 | int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id) |
Patrick McHardy | c1d3ee99 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 147 | { |
Stephen Hemminger | 656299f | 2008-11-19 21:53:47 -0800 | [diff] [blame] | 148 | const char *name = real_dev->name; |
| 149 | const struct net_device_ops *ops = real_dev->netdev_ops; |
Patrick McHardy | 40f98e1 | 2008-01-21 00:24:30 -0800 | [diff] [blame] | 150 | |
Patrick McHardy | c1d3ee99 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 151 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
Joe Perches | afab2d2 | 2011-05-26 10:58:31 +0000 | [diff] [blame] | 152 | pr_info("VLANs not supported on %s\n", name); |
Patrick McHardy | c1d3ee99 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 153 | return -EOPNOTSUPP; |
| 154 | } |
| 155 | |
Patrick McHardy | c1d3ee99 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 156 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && |
Stephen Hemminger | 656299f | 2008-11-19 21:53:47 -0800 | [diff] [blame] | 157 | (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) { |
Joe Perches | afab2d2 | 2011-05-26 10:58:31 +0000 | [diff] [blame] | 158 | pr_info("Device %s has buggy VLAN hw accel\n", name); |
Patrick McHardy | c1d3ee99 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 159 | return -EOPNOTSUPP; |
| 160 | } |
| 161 | |
Jesse Gross | 65ac6a5 | 2010-10-20 13:56:05 +0000 | [diff] [blame] | 162 | if (vlan_find_dev(real_dev, vlan_id) != NULL) |
Patrick McHardy | c1d3ee99 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 163 | return -EEXIST; |
Patrick McHardy | c1d3ee99 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 164 | |
| 165 | return 0; |
| 166 | } |
| 167 | |
Patrick McHardy | 07b5b17 | 2007-06-13 12:07:54 -0700 | [diff] [blame] | 168 | int register_vlan_dev(struct net_device *dev) |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 169 | { |
Patrick McHardy | 9dfebcc | 2008-01-21 00:26:07 -0800 | [diff] [blame] | 170 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 171 | struct net_device *real_dev = vlan->real_dev; |
Stephen Hemminger | 656299f | 2008-11-19 21:53:47 -0800 | [diff] [blame] | 172 | const struct net_device_ops *ops = real_dev->netdev_ops; |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 173 | u16 vlan_id = vlan->vlan_id; |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 174 | struct vlan_group *grp, *ngrp = NULL; |
| 175 | int err; |
| 176 | |
Eric Dumazet | b616b09 | 2010-10-24 21:31:58 +0000 | [diff] [blame] | 177 | grp = rtnl_dereference(real_dev->vlgrp); |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 178 | if (!grp) { |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 179 | ngrp = grp = vlan_group_alloc(real_dev); |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 180 | if (!grp) |
| 181 | return -ENOBUFS; |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 182 | err = vlan_gvrp_init_applicant(real_dev); |
| 183 | if (err < 0) |
| 184 | goto out_free_group; |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 185 | } |
| 186 | |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 187 | err = vlan_group_prealloc_vid(grp, vlan_id); |
| 188 | if (err < 0) |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 189 | goto out_uninit_applicant; |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 190 | |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 191 | err = register_netdevice(dev); |
| 192 | if (err < 0) |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 193 | goto out_uninit_applicant; |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 194 | |
| 195 | /* Account for reference in struct vlan_dev_info */ |
| 196 | dev_hold(real_dev); |
| 197 | |
Patrick Mullaney | fc4a748 | 2009-12-03 15:59:22 -0800 | [diff] [blame] | 198 | netif_stacked_transfer_operstate(real_dev, dev); |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 199 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
| 200 | |
| 201 | /* So, got the sucker initialized, now lets place |
| 202 | * it into our local structure. |
| 203 | */ |
| 204 | vlan_group_set_device(grp, vlan_id, dev); |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 205 | grp->nr_vlans++; |
| 206 | |
Jesse Gross | 65ac6a5 | 2010-10-20 13:56:05 +0000 | [diff] [blame] | 207 | if (ngrp) { |
Jesse Gross | 65ac6a5 | 2010-10-20 13:56:05 +0000 | [diff] [blame] | 208 | rcu_assign_pointer(real_dev->vlgrp, ngrp); |
| 209 | } |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 210 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
Stephen Hemminger | 656299f | 2008-11-19 21:53:47 -0800 | [diff] [blame] | 211 | ops->ndo_vlan_rx_add_vid(real_dev, vlan_id); |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 212 | |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 213 | return 0; |
| 214 | |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 215 | out_uninit_applicant: |
| 216 | if (ngrp) |
| 217 | vlan_gvrp_uninit_applicant(real_dev); |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 218 | out_free_group: |
Eric Dumazet | 6b863d1 | 2009-11-17 06:45:04 -0800 | [diff] [blame] | 219 | if (ngrp) { |
Eric Dumazet | 6b863d1 | 2009-11-17 06:45:04 -0800 | [diff] [blame] | 220 | /* Free the group, after all cpu's are done. */ |
| 221 | call_rcu(&ngrp->rcu, vlan_rcu_free); |
| 222 | } |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 223 | return err; |
| 224 | } |
| 225 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 227 | * 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] | 228 | */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 229 | 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] | 230 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | struct net_device *new_dev; |
Pavel Emelyanov | 7a17a2f | 2008-04-16 00:54:39 -0700 | [diff] [blame] | 232 | struct net *net = dev_net(real_dev); |
| 233 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | char name[IFNAMSIZ]; |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 235 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 237 | if (vlan_id >= VLAN_VID_MASK) |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 238 | return -ERANGE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 240 | err = vlan_check_real_dev(real_dev, vlan_id); |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 241 | if (err < 0) |
| 242 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
| 244 | /* Gotta set up the fields for the device. */ |
Pavel Emelyanov | 7a17a2f | 2008-04-16 00:54:39 -0700 | [diff] [blame] | 245 | switch (vn->name_type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
| 247 | /* name will look like: eth1.0005 */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 248 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | break; |
| 250 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: |
| 251 | /* Put our vlan.VID in the name. |
| 252 | * Name will look like: vlan5 |
| 253 | */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 254 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | break; |
| 256 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: |
| 257 | /* Put our vlan.VID in the name. |
| 258 | * Name will look like: eth0.5 |
| 259 | */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 260 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | break; |
| 262 | case VLAN_NAME_TYPE_PLUS_VID: |
| 263 | /* Put our vlan.VID in the name. |
| 264 | * Name will look like: vlan0005 |
| 265 | */ |
| 266 | default: |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 267 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 268 | } |
YOSHIFUJI Hideaki | 122952f | 2007-02-09 23:24:25 +0900 | [diff] [blame] | 269 | |
Eric Dumazet | 4af429d | 2010-11-10 23:42:00 +0000 | [diff] [blame] | 270 | new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, vlan_setup); |
Arjan van de Ven | 5dd8d1e | 2006-07-03 00:25:33 -0700 | [diff] [blame] | 271 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | if (new_dev == NULL) |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 273 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | |
Pavel Emelyanov | 65d292a | 2008-04-16 00:55:06 -0700 | [diff] [blame] | 275 | dev_net_set(new_dev, net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | /* need 4 bytes for extra VLAN header info, |
| 277 | * hope the underlying device can handle it. |
| 278 | */ |
| 279 | new_dev->mtu = real_dev->mtu; |
| 280 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 281 | vlan_dev_info(new_dev)->vlan_id = vlan_id; |
Patrick McHardy | 9dfebcc | 2008-01-21 00:26:07 -0800 | [diff] [blame] | 282 | vlan_dev_info(new_dev)->real_dev = real_dev; |
| 283 | vlan_dev_info(new_dev)->dent = NULL; |
| 284 | vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | |
Patrick McHardy | 07b5b17 | 2007-06-13 12:07:54 -0700 | [diff] [blame] | 286 | new_dev->rtnl_link_ops = &vlan_link_ops; |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 287 | err = register_vlan_dev(new_dev); |
| 288 | if (err < 0) |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 289 | goto out_free_newdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 291 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | out_free_newdev: |
| 294 | free_netdev(new_dev); |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 295 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | } |
| 297 | |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 298 | static void vlan_sync_address(struct net_device *dev, |
| 299 | struct net_device *vlandev) |
| 300 | { |
Patrick McHardy | 9dfebcc | 2008-01-21 00:26:07 -0800 | [diff] [blame] | 301 | struct vlan_dev_info *vlan = vlan_dev_info(vlandev); |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 302 | |
| 303 | /* May be called without an actual change */ |
| 304 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) |
| 305 | return; |
| 306 | |
| 307 | /* vlan address was different from the old address and is equal to |
| 308 | * the new address */ |
| 309 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && |
| 310 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 311 | dev_uc_del(dev, vlandev->dev_addr); |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 312 | |
| 313 | /* vlan address was equal to the old address and is different from |
| 314 | * the new address */ |
| 315 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && |
| 316 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 317 | dev_uc_add(dev, vlandev->dev_addr); |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 318 | |
| 319 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); |
| 320 | } |
| 321 | |
Patrick McHardy | 5fb1357 | 2008-05-20 14:54:50 -0700 | [diff] [blame] | 322 | static void vlan_transfer_features(struct net_device *dev, |
| 323 | struct net_device *vlandev) |
| 324 | { |
Alexander Duyck | 1ae4be2 | 2008-09-11 20:17:05 -0700 | [diff] [blame] | 325 | vlandev->gso_max_size = dev->gso_max_size; |
John Fastabend | 029f5fc | 2010-10-30 14:22:32 +0000 | [diff] [blame] | 326 | |
| 327 | if (dev->features & NETIF_F_HW_VLAN_TX) |
| 328 | vlandev->hard_header_len = dev->hard_header_len; |
| 329 | else |
| 330 | vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; |
| 331 | |
Vasu Dev | b85daa5 | 2009-08-14 12:41:07 +0000 | [diff] [blame] | 332 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
| 333 | vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; |
| 334 | #endif |
Michał Mirosław | 8a0427b | 2011-04-02 22:49:12 -0700 | [diff] [blame] | 335 | |
| 336 | netdev_update_features(vlandev); |
Patrick McHardy | 5fb1357 | 2008-05-20 14:54:50 -0700 | [diff] [blame] | 337 | } |
| 338 | |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 339 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
| 340 | { |
| 341 | switch (event) { |
| 342 | case NETDEV_CHANGENAME: |
| 343 | vlan_proc_rem_dev(dev); |
| 344 | if (vlan_proc_add_dev(dev) < 0) |
Joe Perches | afab2d2 | 2011-05-26 10:58:31 +0000 | [diff] [blame] | 345 | pr_warn("failed to change proc name for %s\n", |
| 346 | dev->name); |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 347 | break; |
Pavel Emelyanov | 30688a9 | 2008-04-16 00:57:01 -0700 | [diff] [blame] | 348 | case NETDEV_REGISTER: |
| 349 | if (vlan_proc_add_dev(dev) < 0) |
Joe Perches | afab2d2 | 2011-05-26 10:58:31 +0000 | [diff] [blame] | 350 | pr_warn("failed to add proc entry for %s\n", dev->name); |
Pavel Emelyanov | 30688a9 | 2008-04-16 00:57:01 -0700 | [diff] [blame] | 351 | break; |
| 352 | case NETDEV_UNREGISTER: |
| 353 | vlan_proc_rem_dev(dev); |
| 354 | break; |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 355 | } |
| 356 | } |
| 357 | |
Patrick McHardy | 2029cc2 | 2008-01-21 00:26:41 -0800 | [diff] [blame] | 358 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
| 359 | void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | { |
| 361 | struct net_device *dev = ptr; |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 362 | struct vlan_group *grp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | int i, flgs; |
| 364 | struct net_device *vlandev; |
Patrick McHardy | 5e75659 | 2009-11-25 07:54:54 +0000 | [diff] [blame] | 365 | struct vlan_dev_info *vlan; |
Patrick McHardy | 29906f6 | 2009-10-29 23:43:00 -0700 | [diff] [blame] | 366 | LIST_HEAD(list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
Patrick McHardy | 81d8534 | 2008-05-20 14:37:36 -0700 | [diff] [blame] | 368 | if (is_vlan_dev(dev)) |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 369 | __vlan_device_event(dev, event); |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 370 | |
Pedro Garcia | ad1afb0 | 2010-07-18 15:38:44 -0700 | [diff] [blame] | 371 | if ((event == NETDEV_UP) && |
| 372 | (dev->features & NETIF_F_HW_VLAN_FILTER) && |
| 373 | dev->netdev_ops->ndo_vlan_rx_add_vid) { |
Joe Perches | afab2d2 | 2011-05-26 10:58:31 +0000 | [diff] [blame] | 374 | pr_info("adding VLAN 0 to HW filter on device %s\n", |
Pedro Garcia | ad1afb0 | 2010-07-18 15:38:44 -0700 | [diff] [blame] | 375 | dev->name); |
| 376 | dev->netdev_ops->ndo_vlan_rx_add_vid(dev, 0); |
| 377 | } |
| 378 | |
Eric Dumazet | b616b09 | 2010-10-24 21:31:58 +0000 | [diff] [blame] | 379 | grp = rtnl_dereference(dev->vlgrp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | if (!grp) |
| 381 | goto out; |
| 382 | |
| 383 | /* It is OK that we do not hold the group lock right now, |
| 384 | * as we run under the RTNL lock. |
| 385 | */ |
| 386 | |
| 387 | switch (event) { |
| 388 | case NETDEV_CHANGE: |
| 389 | /* Propagate real device state to vlan devices */ |
Jesse Gross | b738127 | 2010-10-20 13:56:02 +0000 | [diff] [blame] | 390 | for (i = 0; i < VLAN_N_VID; i++) { |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 391 | vlandev = vlan_group_get_device(grp, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | if (!vlandev) |
| 393 | continue; |
| 394 | |
Patrick Mullaney | fc4a748 | 2009-12-03 15:59:22 -0800 | [diff] [blame] | 395 | netif_stacked_transfer_operstate(dev, vlandev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | } |
| 397 | break; |
| 398 | |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 399 | case NETDEV_CHANGEADDR: |
| 400 | /* Adjust unicast filters on underlying device */ |
Jesse Gross | b738127 | 2010-10-20 13:56:02 +0000 | [diff] [blame] | 401 | for (i = 0; i < VLAN_N_VID; i++) { |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 402 | vlandev = vlan_group_get_device(grp, i); |
| 403 | if (!vlandev) |
| 404 | continue; |
| 405 | |
Patrick McHardy | d932e04 | 2007-11-10 21:51:40 -0800 | [diff] [blame] | 406 | flgs = vlandev->flags; |
| 407 | if (!(flgs & IFF_UP)) |
| 408 | continue; |
| 409 | |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 410 | vlan_sync_address(dev, vlandev); |
| 411 | } |
| 412 | break; |
| 413 | |
Herbert Xu | 2e477c9 | 2009-07-20 07:35:37 -0700 | [diff] [blame] | 414 | case NETDEV_CHANGEMTU: |
Jesse Gross | b738127 | 2010-10-20 13:56:02 +0000 | [diff] [blame] | 415 | for (i = 0; i < VLAN_N_VID; i++) { |
Herbert Xu | 2e477c9 | 2009-07-20 07:35:37 -0700 | [diff] [blame] | 416 | vlandev = vlan_group_get_device(grp, i); |
| 417 | if (!vlandev) |
| 418 | continue; |
| 419 | |
| 420 | if (vlandev->mtu <= dev->mtu) |
| 421 | continue; |
| 422 | |
| 423 | dev_set_mtu(vlandev, dev->mtu); |
| 424 | } |
| 425 | break; |
| 426 | |
Patrick McHardy | 5fb1357 | 2008-05-20 14:54:50 -0700 | [diff] [blame] | 427 | case NETDEV_FEAT_CHANGE: |
| 428 | /* Propagate device features to underlying device */ |
Jesse Gross | b738127 | 2010-10-20 13:56:02 +0000 | [diff] [blame] | 429 | for (i = 0; i < VLAN_N_VID; i++) { |
Patrick McHardy | 5fb1357 | 2008-05-20 14:54:50 -0700 | [diff] [blame] | 430 | vlandev = vlan_group_get_device(grp, i); |
| 431 | if (!vlandev) |
| 432 | continue; |
| 433 | |
| 434 | vlan_transfer_features(dev, vlandev); |
| 435 | } |
| 436 | |
| 437 | break; |
| 438 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | case NETDEV_DOWN: |
| 440 | /* Put all VLANs for this dev in the down state too. */ |
Jesse Gross | b738127 | 2010-10-20 13:56:02 +0000 | [diff] [blame] | 441 | for (i = 0; i < VLAN_N_VID; i++) { |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 442 | vlandev = vlan_group_get_device(grp, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | if (!vlandev) |
| 444 | continue; |
| 445 | |
| 446 | flgs = vlandev->flags; |
| 447 | if (!(flgs & IFF_UP)) |
| 448 | continue; |
| 449 | |
Patrick McHardy | 5e75659 | 2009-11-25 07:54:54 +0000 | [diff] [blame] | 450 | vlan = vlan_dev_info(vlandev); |
| 451 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
| 452 | dev_change_flags(vlandev, flgs & ~IFF_UP); |
Patrick Mullaney | fc4a748 | 2009-12-03 15:59:22 -0800 | [diff] [blame] | 453 | netif_stacked_transfer_operstate(dev, vlandev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | } |
| 455 | break; |
| 456 | |
| 457 | case NETDEV_UP: |
| 458 | /* Put all VLANs for this dev in the up state too. */ |
Jesse Gross | b738127 | 2010-10-20 13:56:02 +0000 | [diff] [blame] | 459 | for (i = 0; i < VLAN_N_VID; i++) { |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 460 | vlandev = vlan_group_get_device(grp, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | if (!vlandev) |
| 462 | continue; |
YOSHIFUJI Hideaki | 122952f | 2007-02-09 23:24:25 +0900 | [diff] [blame] | 463 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | flgs = vlandev->flags; |
| 465 | if (flgs & IFF_UP) |
| 466 | continue; |
| 467 | |
Patrick McHardy | 5e75659 | 2009-11-25 07:54:54 +0000 | [diff] [blame] | 468 | vlan = vlan_dev_info(vlandev); |
| 469 | if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
| 470 | dev_change_flags(vlandev, flgs | IFF_UP); |
Patrick Mullaney | fc4a748 | 2009-12-03 15:59:22 -0800 | [diff] [blame] | 471 | netif_stacked_transfer_operstate(dev, vlandev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | } |
| 473 | break; |
YOSHIFUJI Hideaki | 122952f | 2007-02-09 23:24:25 +0900 | [diff] [blame] | 474 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | case NETDEV_UNREGISTER: |
David Lamparter | 3b27e10 | 2010-09-17 03:22:19 +0000 | [diff] [blame] | 476 | /* twiddle thumbs on netns device moves */ |
| 477 | if (dev->reg_state != NETREG_UNREGISTERING) |
| 478 | break; |
| 479 | |
Jesse Gross | b738127 | 2010-10-20 13:56:02 +0000 | [diff] [blame] | 480 | for (i = 0; i < VLAN_N_VID; i++) { |
Patrick McHardy | 29906f6 | 2009-10-29 23:43:00 -0700 | [diff] [blame] | 481 | vlandev = vlan_group_get_device(grp, i); |
| 482 | if (!vlandev) |
| 483 | continue; |
| 484 | |
| 485 | /* unregistration of last vlan destroys group, abort |
| 486 | * afterwards */ |
| 487 | if (grp->nr_vlans == 1) |
Jesse Gross | b738127 | 2010-10-20 13:56:02 +0000 | [diff] [blame] | 488 | i = VLAN_N_VID; |
Patrick McHardy | 29906f6 | 2009-10-29 23:43:00 -0700 | [diff] [blame] | 489 | |
| 490 | unregister_vlan_dev(vlandev, &list); |
| 491 | } |
| 492 | unregister_netdevice_many(&list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | break; |
Jiri Pirko | 1c01fe1 | 2010-03-10 10:30:19 +0000 | [diff] [blame] | 494 | |
| 495 | case NETDEV_PRE_TYPE_CHANGE: |
| 496 | /* Forbid underlaying device to change its type. */ |
| 497 | return NOTIFY_BAD; |
Ben Hutchings | 9960647 | 2011-04-15 13:46:49 +0000 | [diff] [blame] | 498 | |
| 499 | case NETDEV_NOTIFY_PEERS: |
Ben Hutchings | 7c89943 | 2011-04-15 13:47:51 +0000 | [diff] [blame] | 500 | case NETDEV_BONDING_FAILOVER: |
Ben Hutchings | 9960647 | 2011-04-15 13:46:49 +0000 | [diff] [blame] | 501 | /* Propagate to vlan devices */ |
| 502 | for (i = 0; i < VLAN_N_VID; i++) { |
| 503 | vlandev = vlan_group_get_device(grp, i); |
| 504 | if (!vlandev) |
| 505 | continue; |
| 506 | |
Ben Hutchings | 7c89943 | 2011-04-15 13:47:51 +0000 | [diff] [blame] | 507 | call_netdevice_notifiers(event, vlandev); |
Ben Hutchings | 9960647 | 2011-04-15 13:46:49 +0000 | [diff] [blame] | 508 | } |
| 509 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 510 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | |
| 512 | out: |
| 513 | return NOTIFY_DONE; |
| 514 | } |
| 515 | |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 516 | static struct notifier_block vlan_notifier_block __read_mostly = { |
| 517 | .notifier_call = vlan_device_event, |
| 518 | }; |
| 519 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | /* |
| 521 | * VLAN IOCTL handler. |
| 522 | * o execute requested action or pass command to the device driver |
| 523 | * arg is really a struct vlan_ioctl_args __user *. |
| 524 | */ |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 525 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | { |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 527 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | struct vlan_ioctl_args args; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 529 | struct net_device *dev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | |
| 531 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) |
| 532 | return -EFAULT; |
| 533 | |
| 534 | /* Null terminate this sucker, just in case. */ |
| 535 | args.device1[23] = 0; |
| 536 | args.u.device2[23] = 0; |
| 537 | |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 538 | rtnl_lock(); |
| 539 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | switch (args.cmd) { |
| 541 | case SET_VLAN_INGRESS_PRIORITY_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 542 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
| 543 | case SET_VLAN_FLAG_CMD: |
| 544 | case ADD_VLAN_CMD: |
| 545 | case DEL_VLAN_CMD: |
| 546 | case GET_VLAN_REALDEV_NAME_CMD: |
| 547 | case GET_VLAN_VID_CMD: |
| 548 | err = -ENODEV; |
Pavel Emelyanov | 65d292a | 2008-04-16 00:55:06 -0700 | [diff] [blame] | 549 | dev = __dev_get_by_name(net, args.device1); |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 550 | if (!dev) |
| 551 | goto out; |
| 552 | |
| 553 | err = -EINVAL; |
Joonwoo Park | 26a2523 | 2008-07-08 03:22:16 -0700 | [diff] [blame] | 554 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 555 | goto out; |
| 556 | } |
| 557 | |
| 558 | switch (args.cmd) { |
| 559 | case SET_VLAN_INGRESS_PRIORITY_CMD: |
| 560 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | if (!capable(CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 562 | break; |
| 563 | vlan_dev_set_ingress_priority(dev, |
| 564 | args.u.skb_priority, |
| 565 | args.vlan_qos); |
Patrick McHardy | fffe470 | 2007-11-07 01:31:32 -0800 | [diff] [blame] | 566 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | break; |
| 568 | |
| 569 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 570 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | if (!capable(CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 572 | break; |
| 573 | err = vlan_dev_set_egress_priority(dev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | args.u.skb_priority, |
| 575 | args.vlan_qos); |
| 576 | break; |
| 577 | |
| 578 | case SET_VLAN_FLAG_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 579 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | if (!capable(CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 581 | break; |
Patrick McHardy | b3ce032 | 2008-07-05 21:26:27 -0700 | [diff] [blame] | 582 | err = vlan_dev_change_flags(dev, |
| 583 | args.vlan_qos ? args.u.flag : 0, |
| 584 | args.u.flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | break; |
| 586 | |
| 587 | case SET_VLAN_NAME_TYPE_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 588 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | if (!capable(CAP_NET_ADMIN)) |
Pavel Emelyanov | e35de02 | 2007-12-06 22:52:16 -0800 | [diff] [blame] | 590 | break; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 591 | if ((args.u.name_type >= 0) && |
| 592 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { |
Pavel Emelyanov | 7a17a2f | 2008-04-16 00:54:39 -0700 | [diff] [blame] | 593 | struct vlan_net *vn; |
| 594 | |
| 595 | vn = net_generic(net, vlan_net_id); |
| 596 | vn->name_type = args.u.name_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | err = 0; |
| 598 | } else { |
| 599 | err = -EINVAL; |
| 600 | } |
| 601 | break; |
| 602 | |
| 603 | case ADD_VLAN_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 604 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | if (!capable(CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 606 | break; |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 607 | err = register_vlan_device(dev, args.u.VID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | break; |
| 609 | |
| 610 | case DEL_VLAN_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 611 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | if (!capable(CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 613 | break; |
Eric Dumazet | 23289a3 | 2009-10-27 07:06:36 +0000 | [diff] [blame] | 614 | unregister_vlan_dev(dev, NULL); |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 615 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | break; |
| 617 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | case GET_VLAN_REALDEV_NAME_CMD: |
Andrew Morton | 3f5f434 | 2007-07-24 15:37:11 -0700 | [diff] [blame] | 619 | err = 0; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 620 | vlan_dev_get_realdev_name(dev, args.u.device2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | if (copy_to_user(arg, &args, |
Patrick McHardy | 2029cc2 | 2008-01-21 00:26:41 -0800 | [diff] [blame] | 622 | sizeof(struct vlan_ioctl_args))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | err = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | break; |
| 625 | |
| 626 | case GET_VLAN_VID_CMD: |
Andrew Morton | 3f5f434 | 2007-07-24 15:37:11 -0700 | [diff] [blame] | 627 | err = 0; |
Patrick McHardy | 22d1ba7 | 2008-07-08 03:23:57 -0700 | [diff] [blame] | 628 | args.u.VID = vlan_dev_vlan_id(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | if (copy_to_user(arg, &args, |
Patrick McHardy | 2029cc2 | 2008-01-21 00:26:41 -0800 | [diff] [blame] | 630 | sizeof(struct vlan_ioctl_args))) |
YOSHIFUJI Hideaki | 122952f | 2007-02-09 23:24:25 +0900 | [diff] [blame] | 631 | err = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | break; |
| 633 | |
| 634 | default: |
Patrick McHardy | 198a291 | 2008-01-21 00:24:59 -0800 | [diff] [blame] | 635 | err = -EOPNOTSUPP; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 636 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 637 | } |
Mika Kukkonen | 7eb1b3d | 2005-12-21 18:39:49 -0800 | [diff] [blame] | 638 | out: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 639 | rtnl_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | return err; |
| 641 | } |
| 642 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 643 | static int __net_init vlan_init_net(struct net *net) |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 644 | { |
Eric W. Biederman | 946d1a9 | 2009-11-29 15:46:05 +0000 | [diff] [blame] | 645 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 646 | int err; |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 647 | |
Pavel Emelyanov | 7a17a2f | 2008-04-16 00:54:39 -0700 | [diff] [blame] | 648 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
| 649 | |
Pavel Emelyanov | cd1c701 | 2008-04-16 00:51:12 -0700 | [diff] [blame] | 650 | err = vlan_proc_init(net); |
Pavel Emelyanov | cd1c701 | 2008-04-16 00:51:12 -0700 | [diff] [blame] | 651 | |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 652 | return err; |
| 653 | } |
| 654 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 655 | static void __net_exit vlan_exit_net(struct net *net) |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 656 | { |
Pavel Emelyanov | cd1c701 | 2008-04-16 00:51:12 -0700 | [diff] [blame] | 657 | vlan_proc_cleanup(net); |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 658 | } |
| 659 | |
| 660 | static struct pernet_operations vlan_net_ops = { |
| 661 | .init = vlan_init_net, |
| 662 | .exit = vlan_exit_net, |
Eric W. Biederman | 946d1a9 | 2009-11-29 15:46:05 +0000 | [diff] [blame] | 663 | .id = &vlan_net_id, |
| 664 | .size = sizeof(struct vlan_net), |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 665 | }; |
| 666 | |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 667 | static int __init vlan_proto_init(void) |
| 668 | { |
| 669 | int err; |
| 670 | |
Justin Mattock | da7c06c | 2011-05-23 20:43:48 +0000 | [diff] [blame] | 671 | pr_info("%s v%s\n", vlan_fullname, vlan_version); |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 672 | |
Eric W. Biederman | 91e2ff3 | 2009-12-02 13:19:08 +0000 | [diff] [blame] | 673 | err = register_pernet_subsys(&vlan_net_ops); |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 674 | if (err < 0) |
| 675 | goto err0; |
| 676 | |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 677 | err = register_netdevice_notifier(&vlan_notifier_block); |
| 678 | if (err < 0) |
| 679 | goto err2; |
| 680 | |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 681 | err = vlan_gvrp_init(); |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 682 | if (err < 0) |
| 683 | goto err3; |
| 684 | |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 685 | err = vlan_netlink_init(); |
| 686 | if (err < 0) |
| 687 | goto err4; |
| 688 | |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 689 | vlan_ioctl_set(vlan_ioctl_handler); |
| 690 | return 0; |
| 691 | |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 692 | err4: |
| 693 | vlan_gvrp_uninit(); |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 694 | err3: |
| 695 | unregister_netdevice_notifier(&vlan_notifier_block); |
| 696 | err2: |
Eric W. Biederman | 91e2ff3 | 2009-12-02 13:19:08 +0000 | [diff] [blame] | 697 | unregister_pernet_subsys(&vlan_net_ops); |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 698 | err0: |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 699 | return err; |
| 700 | } |
| 701 | |
| 702 | static void __exit vlan_cleanup_module(void) |
| 703 | { |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 704 | vlan_ioctl_set(NULL); |
| 705 | vlan_netlink_fini(); |
| 706 | |
| 707 | unregister_netdevice_notifier(&vlan_notifier_block); |
| 708 | |
Eric W. Biederman | 91e2ff3 | 2009-12-02 13:19:08 +0000 | [diff] [blame] | 709 | unregister_pernet_subsys(&vlan_net_ops); |
Jesper Dangaard Brouer | 6e327c1 | 2009-06-08 03:11:28 +0000 | [diff] [blame] | 710 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 711 | |
| 712 | vlan_gvrp_uninit(); |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 713 | } |
| 714 | |
| 715 | module_init(vlan_proto_init); |
| 716 | module_exit(vlan_cleanup_module); |
| 717 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | MODULE_LICENSE("GPL"); |
| 719 | MODULE_VERSION(DRV_VERSION); |