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 | |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 21 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/module.h> |
| 23 | #include <linux/netdevice.h> |
| 24 | #include <linux/skbuff.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/init.h> |
Franck Bui-Huu | 8252474 | 2008-05-12 21:21:05 +0200 | [diff] [blame] | 26 | #include <linux/rculist.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <net/p8022.h> |
| 28 | #include <net/arp.h> |
| 29 | #include <linux/rtnetlink.h> |
| 30 | #include <linux/notifier.h> |
Patrick McHardy | 6136276 | 2008-07-14 22:51:55 -0700 | [diff] [blame] | 31 | #include <net/rtnetlink.h> |
Eric W. Biederman | e9dc865 | 2007-09-12 13:02:17 +0200 | [diff] [blame] | 32 | #include <net/net_namespace.h> |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 33 | #include <net/netns/generic.h> |
Patrick McHardy | 6136276 | 2008-07-14 22:51:55 -0700 | [diff] [blame] | 34 | #include <asm/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
| 36 | #include <linux/if_vlan.h> |
| 37 | #include "vlan.h" |
| 38 | #include "vlanproc.h" |
| 39 | |
| 40 | #define DRV_VERSION "1.8" |
| 41 | |
| 42 | /* Global VLAN variables */ |
| 43 | |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 44 | int vlan_net_id; |
| 45 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | /* Our listing of VLAN group(s) */ |
| 47 | static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -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; |
| 51 | static const char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; |
| 52 | static const char vlan_buggyright[] = "David S. Miller <davem@redhat.com>"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Stephen Hemminger | 7546dd9 | 2009-03-09 08:18:29 +0000 | [diff] [blame] | 54 | static struct packet_type vlan_packet_type __read_mostly = { |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 55 | .type = cpu_to_be16(ETH_P_8021Q), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | .func = vlan_skb_recv, /* VLAN receive method */ |
| 57 | }; |
| 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | /* End of global variables definitions. */ |
| 60 | |
Patrick McHardy | 2029cc2 | 2008-01-21 00:26:41 -0800 | [diff] [blame] | 61 | static inline unsigned int vlan_grp_hashfn(unsigned int idx) |
| 62 | { |
| 63 | return ((idx >> VLAN_GRP_HASH_SHIFT) ^ idx) & VLAN_GRP_HASH_MASK; |
| 64 | } |
| 65 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | /* Must be invoked with RCU read lock (no preempt) */ |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 67 | static struct vlan_group *__vlan_find_group(struct net_device *real_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | { |
| 69 | struct vlan_group *grp; |
| 70 | struct hlist_node *n; |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 71 | int hash = vlan_grp_hashfn(real_dev->ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
| 73 | hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) { |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 74 | if (grp->real_dev == real_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | return grp; |
| 76 | } |
| 77 | |
| 78 | return NULL; |
| 79 | } |
| 80 | |
| 81 | /* Find the protocol handler. Assumes VID < VLAN_VID_MASK. |
| 82 | * |
| 83 | * Must be invoked with RCU read lock (no preempt) |
| 84 | */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 85 | struct net_device *__find_vlan_dev(struct net_device *real_dev, u16 vlan_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | { |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 87 | struct vlan_group *grp = __vlan_find_group(real_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
| 89 | if (grp) |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 90 | return vlan_group_get_device(grp, vlan_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
| 92 | return NULL; |
| 93 | } |
| 94 | |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 95 | static void vlan_group_free(struct vlan_group *grp) |
| 96 | { |
| 97 | int i; |
| 98 | |
Patrick McHardy | 2029cc2 | 2008-01-21 00:26:41 -0800 | [diff] [blame] | 99 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 100 | kfree(grp->vlan_devices_arrays[i]); |
| 101 | kfree(grp); |
| 102 | } |
| 103 | |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 104 | static struct vlan_group *vlan_group_alloc(struct net_device *real_dev) |
Patrick McHardy | 42429aa | 2007-06-13 12:05:59 -0700 | [diff] [blame] | 105 | { |
| 106 | struct vlan_group *grp; |
Patrick McHardy | 42429aa | 2007-06-13 12:05:59 -0700 | [diff] [blame] | 107 | |
| 108 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); |
| 109 | if (!grp) |
| 110 | return NULL; |
| 111 | |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 112 | grp->real_dev = real_dev; |
Patrick McHardy | 42429aa | 2007-06-13 12:05:59 -0700 | [diff] [blame] | 113 | hlist_add_head_rcu(&grp->hlist, |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 114 | &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]); |
Patrick McHardy | 42429aa | 2007-06-13 12:05:59 -0700 | [diff] [blame] | 115 | return grp; |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 116 | } |
Patrick McHardy | 42429aa | 2007-06-13 12:05:59 -0700 | [diff] [blame] | 117 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 118 | 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] | 119 | { |
| 120 | struct net_device **array; |
| 121 | unsigned int size; |
| 122 | |
| 123 | ASSERT_RTNL(); |
| 124 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 125 | array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 126 | if (array != NULL) |
| 127 | return 0; |
| 128 | |
| 129 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; |
| 130 | array = kzalloc(size, GFP_KERNEL); |
| 131 | if (array == NULL) |
| 132 | return -ENOBUFS; |
| 133 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 134 | vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array; |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 135 | return 0; |
Patrick McHardy | 42429aa | 2007-06-13 12:05:59 -0700 | [diff] [blame] | 136 | } |
| 137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | static void vlan_rcu_free(struct rcu_head *rcu) |
| 139 | { |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 140 | vlan_group_free(container_of(rcu, struct vlan_group, rcu)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | } |
| 142 | |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 143 | void unregister_vlan_dev(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | { |
Patrick McHardy | 9dfebcc | 2008-01-21 00:26:07 -0800 | [diff] [blame] | 145 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 146 | struct net_device *real_dev = vlan->real_dev; |
Stephen Hemminger | 656299f | 2008-11-19 21:53:47 -0800 | [diff] [blame] | 147 | const struct net_device_ops *ops = real_dev->netdev_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | struct vlan_group *grp; |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 149 | u16 vlan_id = vlan->vlan_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
| 151 | ASSERT_RTNL(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 153 | grp = __vlan_find_group(real_dev); |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 154 | BUG_ON(!grp); |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 155 | |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 156 | /* Take it out of our own structures, but be sure to interlock with |
| 157 | * HW accelerating devices or SW vlan input packet processing. |
| 158 | */ |
| 159 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
Stephen Hemminger | 656299f | 2008-11-19 21:53:47 -0800 | [diff] [blame] | 160 | ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id); |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 161 | |
| 162 | vlan_group_set_device(grp, vlan_id, NULL); |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 163 | grp->nr_vlans--; |
| 164 | |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 165 | synchronize_net(); |
| 166 | |
Patrick McHardy | ce30500 | 2008-07-05 21:26:41 -0700 | [diff] [blame] | 167 | unregister_netdevice(dev); |
| 168 | |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 169 | /* If the group is now empty, kill off the group. */ |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 170 | if (grp->nr_vlans == 0) { |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 171 | vlan_gvrp_uninit_applicant(real_dev); |
| 172 | |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 173 | if (real_dev->features & NETIF_F_HW_VLAN_RX) |
Stephen Hemminger | 656299f | 2008-11-19 21:53:47 -0800 | [diff] [blame] | 174 | ops->ndo_vlan_rx_register(real_dev, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 176 | hlist_del_rcu(&grp->hlist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 178 | /* Free the group, after all cpu's are done. */ |
| 179 | call_rcu(&grp->rcu, vlan_rcu_free); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | } |
| 181 | |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 182 | /* Get rid of the vlan's reference to real_dev */ |
| 183 | dev_put(real_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | } |
| 185 | |
Patrick McHardy | 2029cc2 | 2008-01-21 00:26:41 -0800 | [diff] [blame] | 186 | static void vlan_transfer_operstate(const struct net_device *dev, |
| 187 | struct net_device *vlandev) |
Stefan Rompf | ddd7bf9 | 2006-03-20 17:11:41 -0800 | [diff] [blame] | 188 | { |
| 189 | /* Have to respect userspace enforced dormant state |
| 190 | * of real device, also must allow supplicant running |
| 191 | * on VLAN device |
| 192 | */ |
| 193 | if (dev->operstate == IF_OPER_DORMANT) |
| 194 | netif_dormant_on(vlandev); |
| 195 | else |
| 196 | netif_dormant_off(vlandev); |
| 197 | |
| 198 | if (netif_carrier_ok(dev)) { |
| 199 | if (!netif_carrier_ok(vlandev)) |
| 200 | netif_carrier_on(vlandev); |
| 201 | } else { |
| 202 | if (netif_carrier_ok(vlandev)) |
| 203 | netif_carrier_off(vlandev); |
| 204 | } |
| 205 | } |
| 206 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 207 | int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id) |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 208 | { |
Stephen Hemminger | 656299f | 2008-11-19 21:53:47 -0800 | [diff] [blame] | 209 | const char *name = real_dev->name; |
| 210 | const struct net_device_ops *ops = real_dev->netdev_ops; |
Patrick McHardy | 40f98e1 | 2008-01-21 00:24:30 -0800 | [diff] [blame] | 211 | |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 212 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
Patrick McHardy | 40f98e1 | 2008-01-21 00:24:30 -0800 | [diff] [blame] | 213 | pr_info("8021q: VLANs not supported on %s\n", name); |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 214 | return -EOPNOTSUPP; |
| 215 | } |
| 216 | |
Stephen Hemminger | 656299f | 2008-11-19 21:53:47 -0800 | [diff] [blame] | 217 | if ((real_dev->features & NETIF_F_HW_VLAN_RX) && !ops->ndo_vlan_rx_register) { |
Patrick McHardy | 40f98e1 | 2008-01-21 00:24:30 -0800 | [diff] [blame] | 218 | pr_info("8021q: device %s has buggy VLAN hw accel\n", name); |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 219 | return -EOPNOTSUPP; |
| 220 | } |
| 221 | |
| 222 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && |
Stephen Hemminger | 656299f | 2008-11-19 21:53:47 -0800 | [diff] [blame] | 223 | (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) { |
Patrick McHardy | 40f98e1 | 2008-01-21 00:24:30 -0800 | [diff] [blame] | 224 | pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 225 | return -EOPNOTSUPP; |
| 226 | } |
| 227 | |
| 228 | /* The real device must be up and operating in order to |
| 229 | * assosciate a VLAN device with it. |
| 230 | */ |
| 231 | if (!(real_dev->flags & IFF_UP)) |
| 232 | return -ENETDOWN; |
| 233 | |
Patrick McHardy | 40f98e1 | 2008-01-21 00:24:30 -0800 | [diff] [blame] | 234 | if (__find_vlan_dev(real_dev, vlan_id) != NULL) |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 235 | return -EEXIST; |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 236 | |
| 237 | return 0; |
| 238 | } |
| 239 | |
Patrick McHardy | 07b5b17 | 2007-06-13 12:07:54 -0700 | [diff] [blame] | 240 | int register_vlan_dev(struct net_device *dev) |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 241 | { |
Patrick McHardy | 9dfebcc | 2008-01-21 00:26:07 -0800 | [diff] [blame] | 242 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 243 | struct net_device *real_dev = vlan->real_dev; |
Stephen Hemminger | 656299f | 2008-11-19 21:53:47 -0800 | [diff] [blame] | 244 | const struct net_device_ops *ops = real_dev->netdev_ops; |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 245 | u16 vlan_id = vlan->vlan_id; |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 246 | struct vlan_group *grp, *ngrp = NULL; |
| 247 | int err; |
| 248 | |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 249 | grp = __vlan_find_group(real_dev); |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 250 | if (!grp) { |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 251 | ngrp = grp = vlan_group_alloc(real_dev); |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 252 | if (!grp) |
| 253 | return -ENOBUFS; |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 254 | err = vlan_gvrp_init_applicant(real_dev); |
| 255 | if (err < 0) |
| 256 | goto out_free_group; |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 257 | } |
| 258 | |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 259 | err = vlan_group_prealloc_vid(grp, vlan_id); |
| 260 | if (err < 0) |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 261 | goto out_uninit_applicant; |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 262 | |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 263 | err = register_netdevice(dev); |
| 264 | if (err < 0) |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 265 | goto out_uninit_applicant; |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 266 | |
| 267 | /* Account for reference in struct vlan_dev_info */ |
| 268 | dev_hold(real_dev); |
| 269 | |
| 270 | vlan_transfer_operstate(real_dev, dev); |
| 271 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
| 272 | |
| 273 | /* So, got the sucker initialized, now lets place |
| 274 | * it into our local structure. |
| 275 | */ |
| 276 | vlan_group_set_device(grp, vlan_id, dev); |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 277 | grp->nr_vlans++; |
| 278 | |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 279 | if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) |
Stephen Hemminger | 656299f | 2008-11-19 21:53:47 -0800 | [diff] [blame] | 280 | ops->ndo_vlan_rx_register(real_dev, ngrp); |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 281 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
Stephen Hemminger | 656299f | 2008-11-19 21:53:47 -0800 | [diff] [blame] | 282 | ops->ndo_vlan_rx_add_vid(real_dev, vlan_id); |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 283 | |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 284 | return 0; |
| 285 | |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 286 | out_uninit_applicant: |
| 287 | if (ngrp) |
| 288 | vlan_gvrp_uninit_applicant(real_dev); |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 289 | out_free_group: |
| 290 | if (ngrp) |
| 291 | vlan_group_free(ngrp); |
| 292 | return err; |
| 293 | } |
| 294 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 296 | * 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] | 297 | */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 298 | 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] | 299 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | struct net_device *new_dev; |
Pavel Emelyanov | 7a17a2f | 2008-04-16 00:54:39 -0700 | [diff] [blame] | 301 | struct net *net = dev_net(real_dev); |
| 302 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | char name[IFNAMSIZ]; |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 304 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 306 | if (vlan_id >= VLAN_VID_MASK) |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 307 | return -ERANGE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 309 | err = vlan_check_real_dev(real_dev, vlan_id); |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 310 | if (err < 0) |
| 311 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | |
| 313 | /* Gotta set up the fields for the device. */ |
Pavel Emelyanov | 7a17a2f | 2008-04-16 00:54:39 -0700 | [diff] [blame] | 314 | switch (vn->name_type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
| 316 | /* name will look like: eth1.0005 */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 317 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | break; |
| 319 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: |
| 320 | /* Put our vlan.VID in the name. |
| 321 | * Name will look like: vlan5 |
| 322 | */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 323 | snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | break; |
| 325 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: |
| 326 | /* Put our vlan.VID in the name. |
| 327 | * Name will look like: eth0.5 |
| 328 | */ |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 329 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | break; |
| 331 | case VLAN_NAME_TYPE_PLUS_VID: |
| 332 | /* Put our vlan.VID in the name. |
| 333 | * Name will look like: vlan0005 |
| 334 | */ |
| 335 | default: |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 336 | snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 337 | } |
YOSHIFUJI Hideaki | 122952f | 2007-02-09 23:24:25 +0900 | [diff] [blame] | 338 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, |
| 340 | vlan_setup); |
Arjan van de Ven | 5dd8d1e | 2006-07-03 00:25:33 -0700 | [diff] [blame] | 341 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | if (new_dev == NULL) |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 343 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
Pavel Emelyanov | 65d292a | 2008-04-16 00:55:06 -0700 | [diff] [blame] | 345 | dev_net_set(new_dev, net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | /* need 4 bytes for extra VLAN header info, |
| 347 | * hope the underlying device can handle it. |
| 348 | */ |
| 349 | new_dev->mtu = real_dev->mtu; |
| 350 | |
Patrick McHardy | 9bb8582 | 2008-07-08 03:24:44 -0700 | [diff] [blame] | 351 | vlan_dev_info(new_dev)->vlan_id = vlan_id; |
Patrick McHardy | 9dfebcc | 2008-01-21 00:26:07 -0800 | [diff] [blame] | 352 | vlan_dev_info(new_dev)->real_dev = real_dev; |
| 353 | vlan_dev_info(new_dev)->dent = NULL; |
| 354 | vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
Patrick McHardy | 07b5b17 | 2007-06-13 12:07:54 -0700 | [diff] [blame] | 356 | new_dev->rtnl_link_ops = &vlan_link_ops; |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 357 | err = register_vlan_dev(new_dev); |
| 358 | if (err < 0) |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 359 | goto out_free_newdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 361 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | out_free_newdev: |
| 364 | free_netdev(new_dev); |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 365 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | } |
| 367 | |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 368 | static void vlan_sync_address(struct net_device *dev, |
| 369 | struct net_device *vlandev) |
| 370 | { |
Patrick McHardy | 9dfebcc | 2008-01-21 00:26:07 -0800 | [diff] [blame] | 371 | struct vlan_dev_info *vlan = vlan_dev_info(vlandev); |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 372 | |
| 373 | /* May be called without an actual change */ |
| 374 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) |
| 375 | return; |
| 376 | |
| 377 | /* vlan address was different from the old address and is equal to |
| 378 | * the new address */ |
| 379 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && |
| 380 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) |
| 381 | dev_unicast_delete(dev, vlandev->dev_addr, ETH_ALEN); |
| 382 | |
| 383 | /* vlan address was equal to the old address and is different from |
| 384 | * the new address */ |
| 385 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && |
| 386 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) |
| 387 | dev_unicast_add(dev, vlandev->dev_addr, ETH_ALEN); |
| 388 | |
| 389 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); |
| 390 | } |
| 391 | |
Patrick McHardy | 5fb1357 | 2008-05-20 14:54:50 -0700 | [diff] [blame] | 392 | static void vlan_transfer_features(struct net_device *dev, |
| 393 | struct net_device *vlandev) |
| 394 | { |
| 395 | unsigned long old_features = vlandev->features; |
| 396 | |
Patrick McHardy | 289c79a | 2008-05-23 00:22:04 -0700 | [diff] [blame] | 397 | vlandev->features &= ~dev->vlan_features; |
| 398 | vlandev->features |= dev->features & dev->vlan_features; |
Alexander Duyck | 1ae4be2 | 2008-09-11 20:17:05 -0700 | [diff] [blame] | 399 | vlandev->gso_max_size = dev->gso_max_size; |
Patrick McHardy | 5fb1357 | 2008-05-20 14:54:50 -0700 | [diff] [blame] | 400 | |
| 401 | if (old_features != vlandev->features) |
| 402 | netdev_features_change(vlandev); |
| 403 | } |
| 404 | |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 405 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
| 406 | { |
| 407 | switch (event) { |
| 408 | case NETDEV_CHANGENAME: |
| 409 | vlan_proc_rem_dev(dev); |
| 410 | if (vlan_proc_add_dev(dev) < 0) |
| 411 | pr_warning("8021q: failed to change proc name for %s\n", |
| 412 | dev->name); |
| 413 | break; |
Pavel Emelyanov | 30688a9 | 2008-04-16 00:57:01 -0700 | [diff] [blame] | 414 | case NETDEV_REGISTER: |
| 415 | if (vlan_proc_add_dev(dev) < 0) |
| 416 | pr_warning("8021q: failed to add proc entry for %s\n", |
| 417 | dev->name); |
| 418 | break; |
| 419 | case NETDEV_UNREGISTER: |
| 420 | vlan_proc_rem_dev(dev); |
| 421 | break; |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 422 | } |
| 423 | } |
| 424 | |
Patrick McHardy | 2029cc2 | 2008-01-21 00:26:41 -0800 | [diff] [blame] | 425 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
| 426 | void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | { |
| 428 | struct net_device *dev = ptr; |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 429 | struct vlan_group *grp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | int i, flgs; |
| 431 | struct net_device *vlandev; |
| 432 | |
Patrick McHardy | 81d8534 | 2008-05-20 14:37:36 -0700 | [diff] [blame] | 433 | if (is_vlan_dev(dev)) |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 434 | __vlan_device_event(dev, event); |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 435 | |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 436 | grp = __vlan_find_group(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | if (!grp) |
| 438 | goto out; |
| 439 | |
| 440 | /* It is OK that we do not hold the group lock right now, |
| 441 | * as we run under the RTNL lock. |
| 442 | */ |
| 443 | |
| 444 | switch (event) { |
| 445 | case NETDEV_CHANGE: |
| 446 | /* Propagate real device state to vlan devices */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 448 | vlandev = vlan_group_get_device(grp, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | if (!vlandev) |
| 450 | continue; |
| 451 | |
Stefan Rompf | ddd7bf9 | 2006-03-20 17:11:41 -0800 | [diff] [blame] | 452 | vlan_transfer_operstate(dev, vlandev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | } |
| 454 | break; |
| 455 | |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 456 | case NETDEV_CHANGEADDR: |
| 457 | /* Adjust unicast filters on underlying device */ |
| 458 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
| 459 | vlandev = vlan_group_get_device(grp, i); |
| 460 | if (!vlandev) |
| 461 | continue; |
| 462 | |
Patrick McHardy | d932e04 | 2007-11-10 21:51:40 -0800 | [diff] [blame] | 463 | flgs = vlandev->flags; |
| 464 | if (!(flgs & IFF_UP)) |
| 465 | continue; |
| 466 | |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 467 | vlan_sync_address(dev, vlandev); |
| 468 | } |
| 469 | break; |
| 470 | |
Patrick McHardy | 5fb1357 | 2008-05-20 14:54:50 -0700 | [diff] [blame] | 471 | case NETDEV_FEAT_CHANGE: |
| 472 | /* Propagate device features to underlying device */ |
| 473 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
| 474 | vlandev = vlan_group_get_device(grp, i); |
| 475 | if (!vlandev) |
| 476 | continue; |
| 477 | |
| 478 | vlan_transfer_features(dev, vlandev); |
| 479 | } |
| 480 | |
| 481 | break; |
| 482 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | case NETDEV_DOWN: |
| 484 | /* Put all VLANs for this dev in the down state too. */ |
| 485 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 486 | vlandev = vlan_group_get_device(grp, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | if (!vlandev) |
| 488 | continue; |
| 489 | |
| 490 | flgs = vlandev->flags; |
| 491 | if (!(flgs & IFF_UP)) |
| 492 | continue; |
| 493 | |
| 494 | dev_change_flags(vlandev, flgs & ~IFF_UP); |
Jay Vosburgh | adc667e | 2009-04-25 18:03:35 -0700 | [diff] [blame] | 495 | vlan_transfer_operstate(dev, vlandev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | } |
| 497 | break; |
| 498 | |
| 499 | case NETDEV_UP: |
| 500 | /* Put all VLANs for this dev in the up state too. */ |
| 501 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 502 | vlandev = vlan_group_get_device(grp, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | if (!vlandev) |
| 504 | continue; |
YOSHIFUJI Hideaki | 122952f | 2007-02-09 23:24:25 +0900 | [diff] [blame] | 505 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | flgs = vlandev->flags; |
| 507 | if (flgs & IFF_UP) |
| 508 | continue; |
| 509 | |
| 510 | dev_change_flags(vlandev, flgs | IFF_UP); |
Jay Vosburgh | adc667e | 2009-04-25 18:03:35 -0700 | [diff] [blame] | 511 | vlan_transfer_operstate(dev, vlandev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | } |
| 513 | break; |
YOSHIFUJI Hideaki | 122952f | 2007-02-09 23:24:25 +0900 | [diff] [blame] | 514 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | case NETDEV_UNREGISTER: |
| 516 | /* Delete all VLANs for this dev. */ |
| 517 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 518 | vlandev = vlan_group_get_device(grp, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | if (!vlandev) |
| 520 | continue; |
| 521 | |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 522 | /* unregistration of last vlan destroys group, abort |
| 523 | * afterwards */ |
| 524 | if (grp->nr_vlans == 1) |
| 525 | i = VLAN_GROUP_ARRAY_LEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 527 | unregister_vlan_dev(vlandev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | } |
| 529 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 530 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | |
| 532 | out: |
| 533 | return NOTIFY_DONE; |
| 534 | } |
| 535 | |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 536 | static struct notifier_block vlan_notifier_block __read_mostly = { |
| 537 | .notifier_call = vlan_device_event, |
| 538 | }; |
| 539 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | /* |
| 541 | * VLAN IOCTL handler. |
| 542 | * o execute requested action or pass command to the device driver |
| 543 | * arg is really a struct vlan_ioctl_args __user *. |
| 544 | */ |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 545 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | { |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 547 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | struct vlan_ioctl_args args; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 549 | struct net_device *dev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | |
| 551 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) |
| 552 | return -EFAULT; |
| 553 | |
| 554 | /* Null terminate this sucker, just in case. */ |
| 555 | args.device1[23] = 0; |
| 556 | args.u.device2[23] = 0; |
| 557 | |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 558 | rtnl_lock(); |
| 559 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | switch (args.cmd) { |
| 561 | case SET_VLAN_INGRESS_PRIORITY_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 562 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
| 563 | case SET_VLAN_FLAG_CMD: |
| 564 | case ADD_VLAN_CMD: |
| 565 | case DEL_VLAN_CMD: |
| 566 | case GET_VLAN_REALDEV_NAME_CMD: |
| 567 | case GET_VLAN_VID_CMD: |
| 568 | err = -ENODEV; |
Pavel Emelyanov | 65d292a | 2008-04-16 00:55:06 -0700 | [diff] [blame] | 569 | dev = __dev_get_by_name(net, args.device1); |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 570 | if (!dev) |
| 571 | goto out; |
| 572 | |
| 573 | err = -EINVAL; |
Joonwoo Park | 26a2523 | 2008-07-08 03:22:16 -0700 | [diff] [blame] | 574 | if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 575 | goto out; |
| 576 | } |
| 577 | |
| 578 | switch (args.cmd) { |
| 579 | case SET_VLAN_INGRESS_PRIORITY_CMD: |
| 580 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | if (!capable(CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 582 | break; |
| 583 | vlan_dev_set_ingress_priority(dev, |
| 584 | args.u.skb_priority, |
| 585 | args.vlan_qos); |
Patrick McHardy | fffe470 | 2007-11-07 01:31:32 -0800 | [diff] [blame] | 586 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | break; |
| 588 | |
| 589 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 590 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | if (!capable(CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 592 | break; |
| 593 | err = vlan_dev_set_egress_priority(dev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | args.u.skb_priority, |
| 595 | args.vlan_qos); |
| 596 | break; |
| 597 | |
| 598 | case SET_VLAN_FLAG_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 599 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | if (!capable(CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 601 | break; |
Patrick McHardy | b3ce032 | 2008-07-05 21:26:27 -0700 | [diff] [blame] | 602 | err = vlan_dev_change_flags(dev, |
| 603 | args.vlan_qos ? args.u.flag : 0, |
| 604 | args.u.flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | break; |
| 606 | |
| 607 | case SET_VLAN_NAME_TYPE_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 608 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | if (!capable(CAP_NET_ADMIN)) |
Pavel Emelyanov | e35de02 | 2007-12-06 22:52:16 -0800 | [diff] [blame] | 610 | break; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 611 | if ((args.u.name_type >= 0) && |
| 612 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { |
Pavel Emelyanov | 7a17a2f | 2008-04-16 00:54:39 -0700 | [diff] [blame] | 613 | struct vlan_net *vn; |
| 614 | |
| 615 | vn = net_generic(net, vlan_net_id); |
| 616 | vn->name_type = args.u.name_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | err = 0; |
| 618 | } else { |
| 619 | err = -EINVAL; |
| 620 | } |
| 621 | break; |
| 622 | |
| 623 | case ADD_VLAN_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 624 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | if (!capable(CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 626 | break; |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 627 | err = register_vlan_device(dev, args.u.VID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | break; |
| 629 | |
| 630 | case DEL_VLAN_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 631 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | if (!capable(CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 633 | break; |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 634 | unregister_vlan_dev(dev); |
| 635 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | break; |
| 637 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | case GET_VLAN_REALDEV_NAME_CMD: |
Andrew Morton | 3f5f434 | 2007-07-24 15:37:11 -0700 | [diff] [blame] | 639 | err = 0; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 640 | vlan_dev_get_realdev_name(dev, args.u.device2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | if (copy_to_user(arg, &args, |
Patrick McHardy | 2029cc2 | 2008-01-21 00:26:41 -0800 | [diff] [blame] | 642 | sizeof(struct vlan_ioctl_args))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | err = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | break; |
| 645 | |
| 646 | case GET_VLAN_VID_CMD: |
Andrew Morton | 3f5f434 | 2007-07-24 15:37:11 -0700 | [diff] [blame] | 647 | err = 0; |
Patrick McHardy | 22d1ba7 | 2008-07-08 03:23:57 -0700 | [diff] [blame] | 648 | args.u.VID = vlan_dev_vlan_id(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | if (copy_to_user(arg, &args, |
Patrick McHardy | 2029cc2 | 2008-01-21 00:26:41 -0800 | [diff] [blame] | 650 | sizeof(struct vlan_ioctl_args))) |
YOSHIFUJI Hideaki | 122952f | 2007-02-09 23:24:25 +0900 | [diff] [blame] | 651 | err = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | break; |
| 653 | |
| 654 | default: |
Patrick McHardy | 198a291 | 2008-01-21 00:24:59 -0800 | [diff] [blame] | 655 | err = -EOPNOTSUPP; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 656 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 657 | } |
Mika Kukkonen | 7eb1b3d | 2005-12-21 18:39:49 -0800 | [diff] [blame] | 658 | out: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 659 | rtnl_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | return err; |
| 661 | } |
| 662 | |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 663 | static int vlan_init_net(struct net *net) |
| 664 | { |
| 665 | int err; |
| 666 | struct vlan_net *vn; |
| 667 | |
| 668 | err = -ENOMEM; |
| 669 | vn = kzalloc(sizeof(struct vlan_net), GFP_KERNEL); |
| 670 | if (vn == NULL) |
| 671 | goto err_alloc; |
| 672 | |
| 673 | err = net_assign_generic(net, vlan_net_id, vn); |
| 674 | if (err < 0) |
| 675 | goto err_assign; |
| 676 | |
Pavel Emelyanov | 7a17a2f | 2008-04-16 00:54:39 -0700 | [diff] [blame] | 677 | vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
| 678 | |
Pavel Emelyanov | cd1c701 | 2008-04-16 00:51:12 -0700 | [diff] [blame] | 679 | err = vlan_proc_init(net); |
| 680 | if (err < 0) |
| 681 | goto err_proc; |
| 682 | |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 683 | return 0; |
| 684 | |
Pavel Emelyanov | cd1c701 | 2008-04-16 00:51:12 -0700 | [diff] [blame] | 685 | err_proc: |
| 686 | /* nothing */ |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 687 | err_assign: |
| 688 | kfree(vn); |
| 689 | err_alloc: |
| 690 | return err; |
| 691 | } |
| 692 | |
| 693 | static void vlan_exit_net(struct net *net) |
| 694 | { |
| 695 | struct vlan_net *vn; |
| 696 | |
| 697 | vn = net_generic(net, vlan_net_id); |
Pavel Emelyanov | 65d292a | 2008-04-16 00:55:06 -0700 | [diff] [blame] | 698 | rtnl_kill_links(net, &vlan_link_ops); |
Pavel Emelyanov | cd1c701 | 2008-04-16 00:51:12 -0700 | [diff] [blame] | 699 | vlan_proc_cleanup(net); |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 700 | kfree(vn); |
| 701 | } |
| 702 | |
| 703 | static struct pernet_operations vlan_net_ops = { |
| 704 | .init = vlan_init_net, |
| 705 | .exit = vlan_exit_net, |
| 706 | }; |
| 707 | |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 708 | static int __init vlan_proto_init(void) |
| 709 | { |
| 710 | int err; |
| 711 | |
| 712 | pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); |
| 713 | pr_info("All bugs added by %s\n", vlan_buggyright); |
| 714 | |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 715 | err = register_pernet_gen_device(&vlan_net_id, &vlan_net_ops); |
| 716 | if (err < 0) |
| 717 | goto err0; |
| 718 | |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 719 | err = register_netdevice_notifier(&vlan_notifier_block); |
| 720 | if (err < 0) |
| 721 | goto err2; |
| 722 | |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 723 | err = vlan_gvrp_init(); |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 724 | if (err < 0) |
| 725 | goto err3; |
| 726 | |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 727 | err = vlan_netlink_init(); |
| 728 | if (err < 0) |
| 729 | goto err4; |
| 730 | |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 731 | dev_add_pack(&vlan_packet_type); |
| 732 | vlan_ioctl_set(vlan_ioctl_handler); |
| 733 | return 0; |
| 734 | |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 735 | err4: |
| 736 | vlan_gvrp_uninit(); |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 737 | err3: |
| 738 | unregister_netdevice_notifier(&vlan_notifier_block); |
| 739 | err2: |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 740 | unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops); |
| 741 | err0: |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 742 | return err; |
| 743 | } |
| 744 | |
| 745 | static void __exit vlan_cleanup_module(void) |
| 746 | { |
| 747 | unsigned int i; |
| 748 | |
| 749 | vlan_ioctl_set(NULL); |
| 750 | vlan_netlink_fini(); |
| 751 | |
| 752 | unregister_netdevice_notifier(&vlan_notifier_block); |
| 753 | |
| 754 | dev_remove_pack(&vlan_packet_type); |
| 755 | |
| 756 | /* This table must be empty if there are no module references left. */ |
| 757 | for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) |
| 758 | BUG_ON(!hlist_empty(&vlan_group_hash[i])); |
| 759 | |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 760 | unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops); |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 761 | synchronize_net(); |
Patrick McHardy | 70c03b4 | 2008-07-05 21:26:57 -0700 | [diff] [blame] | 762 | |
| 763 | vlan_gvrp_uninit(); |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 764 | } |
| 765 | |
| 766 | module_init(vlan_proto_init); |
| 767 | module_exit(vlan_cleanup_module); |
| 768 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | MODULE_LICENSE("GPL"); |
| 770 | MODULE_VERSION(DRV_VERSION); |