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 | |
| 21 | #include <asm/uaccess.h> /* for copy_from_user */ |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 22 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/module.h> |
| 24 | #include <linux/netdevice.h> |
| 25 | #include <linux/skbuff.h> |
| 26 | #include <net/datalink.h> |
| 27 | #include <linux/mm.h> |
| 28 | #include <linux/in.h> |
| 29 | #include <linux/init.h> |
| 30 | #include <net/p8022.h> |
| 31 | #include <net/arp.h> |
| 32 | #include <linux/rtnetlink.h> |
| 33 | #include <linux/notifier.h> |
Eric W. Biederman | e9dc865 | 2007-09-12 13:02:17 +0200 | [diff] [blame] | 34 | #include <net/net_namespace.h> |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 35 | #include <net/netns/generic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
| 37 | #include <linux/if_vlan.h> |
| 38 | #include "vlan.h" |
| 39 | #include "vlanproc.h" |
| 40 | |
| 41 | #define DRV_VERSION "1.8" |
| 42 | |
| 43 | /* Global VLAN variables */ |
| 44 | |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 45 | int vlan_net_id; |
| 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | /* Our listing of VLAN group(s) */ |
| 48 | static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
| 50 | static char vlan_fullname[] = "802.1Q VLAN Support"; |
| 51 | static char vlan_version[] = DRV_VERSION; |
| 52 | static char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; |
| 53 | static char vlan_buggyright[] = "David S. Miller <davem@redhat.com>"; |
| 54 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | static struct packet_type vlan_packet_type = { |
| 56 | .type = __constant_htons(ETH_P_8021Q), |
| 57 | .func = vlan_skb_recv, /* VLAN receive method */ |
| 58 | }; |
| 59 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | /* End of global variables definitions. */ |
| 61 | |
Patrick McHardy | 2029cc2 | 2008-01-21 00:26:41 -0800 | [diff] [blame] | 62 | static inline unsigned int vlan_grp_hashfn(unsigned int idx) |
| 63 | { |
| 64 | return ((idx >> VLAN_GRP_HASH_SHIFT) ^ idx) & VLAN_GRP_HASH_MASK; |
| 65 | } |
| 66 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | /* Must be invoked with RCU read lock (no preempt) */ |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 68 | static struct vlan_group *__vlan_find_group(struct net_device *real_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | { |
| 70 | struct vlan_group *grp; |
| 71 | struct hlist_node *n; |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 72 | int hash = vlan_grp_hashfn(real_dev->ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
| 74 | hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) { |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 75 | if (grp->real_dev == real_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | return grp; |
| 77 | } |
| 78 | |
| 79 | return NULL; |
| 80 | } |
| 81 | |
| 82 | /* Find the protocol handler. Assumes VID < VLAN_VID_MASK. |
| 83 | * |
| 84 | * Must be invoked with RCU read lock (no preempt) |
| 85 | */ |
| 86 | struct net_device *__find_vlan_dev(struct net_device *real_dev, |
| 87 | unsigned short VID) |
| 88 | { |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 89 | struct vlan_group *grp = __vlan_find_group(real_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
| 91 | if (grp) |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 92 | return vlan_group_get_device(grp, VID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
| 94 | return NULL; |
| 95 | } |
| 96 | |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 97 | static void vlan_group_free(struct vlan_group *grp) |
| 98 | { |
| 99 | int i; |
| 100 | |
Patrick McHardy | 2029cc2 | 2008-01-21 00:26:41 -0800 | [diff] [blame] | 101 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 102 | kfree(grp->vlan_devices_arrays[i]); |
| 103 | kfree(grp); |
| 104 | } |
| 105 | |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 106 | static struct vlan_group *vlan_group_alloc(struct net_device *real_dev) |
Patrick McHardy | 42429aa | 2007-06-13 12:05:59 -0700 | [diff] [blame] | 107 | { |
| 108 | struct vlan_group *grp; |
Patrick McHardy | 42429aa | 2007-06-13 12:05:59 -0700 | [diff] [blame] | 109 | |
| 110 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); |
| 111 | if (!grp) |
| 112 | return NULL; |
| 113 | |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 114 | grp->real_dev = real_dev; |
Patrick McHardy | 42429aa | 2007-06-13 12:05:59 -0700 | [diff] [blame] | 115 | hlist_add_head_rcu(&grp->hlist, |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 116 | &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]); |
Patrick McHardy | 42429aa | 2007-06-13 12:05:59 -0700 | [diff] [blame] | 117 | return grp; |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 118 | } |
Patrick McHardy | 42429aa | 2007-06-13 12:05:59 -0700 | [diff] [blame] | 119 | |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 120 | static int vlan_group_prealloc_vid(struct vlan_group *vg, int vid) |
| 121 | { |
| 122 | struct net_device **array; |
| 123 | unsigned int size; |
| 124 | |
| 125 | ASSERT_RTNL(); |
| 126 | |
| 127 | array = vg->vlan_devices_arrays[vid / VLAN_GROUP_ARRAY_PART_LEN]; |
| 128 | if (array != NULL) |
| 129 | return 0; |
| 130 | |
| 131 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; |
| 132 | array = kzalloc(size, GFP_KERNEL); |
| 133 | if (array == NULL) |
| 134 | return -ENOBUFS; |
| 135 | |
| 136 | vg->vlan_devices_arrays[vid / VLAN_GROUP_ARRAY_PART_LEN] = array; |
| 137 | return 0; |
Patrick McHardy | 42429aa | 2007-06-13 12:05:59 -0700 | [diff] [blame] | 138 | } |
| 139 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | static void vlan_rcu_free(struct rcu_head *rcu) |
| 141 | { |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 142 | vlan_group_free(container_of(rcu, struct vlan_group, rcu)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | } |
| 144 | |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 145 | void unregister_vlan_dev(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | { |
Patrick McHardy | 9dfebcc | 2008-01-21 00:26:07 -0800 | [diff] [blame] | 147 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 148 | struct net_device *real_dev = vlan->real_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | struct vlan_group *grp; |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 150 | unsigned short vlan_id = vlan->vlan_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
| 152 | ASSERT_RTNL(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 154 | grp = __vlan_find_group(real_dev); |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 155 | BUG_ON(!grp); |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 156 | |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 157 | /* Take it out of our own structures, but be sure to interlock with |
| 158 | * HW accelerating devices or SW vlan input packet processing. |
| 159 | */ |
| 160 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
| 161 | real_dev->vlan_rx_kill_vid(real_dev, vlan_id); |
| 162 | |
| 163 | vlan_group_set_device(grp, vlan_id, NULL); |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 164 | grp->nr_vlans--; |
| 165 | |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 166 | synchronize_net(); |
| 167 | |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 168 | /* If the group is now empty, kill off the group. */ |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 169 | if (grp->nr_vlans == 0) { |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 170 | if (real_dev->features & NETIF_F_HW_VLAN_RX) |
| 171 | real_dev->vlan_rx_register(real_dev, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 173 | hlist_del_rcu(&grp->hlist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 175 | /* Free the group, after all cpu's are done. */ |
| 176 | call_rcu(&grp->rcu, vlan_rcu_free); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | } |
| 178 | |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 179 | /* Get rid of the vlan's reference to real_dev */ |
| 180 | dev_put(real_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 182 | unregister_netdevice(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | } |
| 184 | |
Patrick McHardy | 2029cc2 | 2008-01-21 00:26:41 -0800 | [diff] [blame] | 185 | static void vlan_transfer_operstate(const struct net_device *dev, |
| 186 | struct net_device *vlandev) |
Stefan Rompf | ddd7bf9 | 2006-03-20 17:11:41 -0800 | [diff] [blame] | 187 | { |
| 188 | /* Have to respect userspace enforced dormant state |
| 189 | * of real device, also must allow supplicant running |
| 190 | * on VLAN device |
| 191 | */ |
| 192 | if (dev->operstate == IF_OPER_DORMANT) |
| 193 | netif_dormant_on(vlandev); |
| 194 | else |
| 195 | netif_dormant_off(vlandev); |
| 196 | |
| 197 | if (netif_carrier_ok(dev)) { |
| 198 | if (!netif_carrier_ok(vlandev)) |
| 199 | netif_carrier_on(vlandev); |
| 200 | } else { |
| 201 | if (netif_carrier_ok(vlandev)) |
| 202 | netif_carrier_off(vlandev); |
| 203 | } |
| 204 | } |
| 205 | |
Patrick McHardy | 07b5b17 | 2007-06-13 12:07:54 -0700 | [diff] [blame] | 206 | int vlan_check_real_dev(struct net_device *real_dev, unsigned short vlan_id) |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 207 | { |
Patrick McHardy | 40f98e1 | 2008-01-21 00:24:30 -0800 | [diff] [blame] | 208 | char *name = real_dev->name; |
| 209 | |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 210 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
Patrick McHardy | 40f98e1 | 2008-01-21 00:24:30 -0800 | [diff] [blame] | 211 | pr_info("8021q: VLANs not supported on %s\n", name); |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 212 | return -EOPNOTSUPP; |
| 213 | } |
| 214 | |
| 215 | if ((real_dev->features & NETIF_F_HW_VLAN_RX) && |
| 216 | !real_dev->vlan_rx_register) { |
Patrick McHardy | 40f98e1 | 2008-01-21 00:24:30 -0800 | [diff] [blame] | 217 | pr_info("8021q: device %s has buggy VLAN hw accel\n", name); |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 218 | return -EOPNOTSUPP; |
| 219 | } |
| 220 | |
| 221 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && |
| 222 | (!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) { |
Patrick McHardy | 40f98e1 | 2008-01-21 00:24:30 -0800 | [diff] [blame] | 223 | pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 224 | return -EOPNOTSUPP; |
| 225 | } |
| 226 | |
| 227 | /* The real device must be up and operating in order to |
| 228 | * assosciate a VLAN device with it. |
| 229 | */ |
| 230 | if (!(real_dev->flags & IFF_UP)) |
| 231 | return -ENETDOWN; |
| 232 | |
Patrick McHardy | 40f98e1 | 2008-01-21 00:24:30 -0800 | [diff] [blame] | 233 | if (__find_vlan_dev(real_dev, vlan_id) != NULL) |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 234 | return -EEXIST; |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 235 | |
| 236 | return 0; |
| 237 | } |
| 238 | |
Patrick McHardy | 07b5b17 | 2007-06-13 12:07:54 -0700 | [diff] [blame] | 239 | int register_vlan_dev(struct net_device *dev) |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 240 | { |
Patrick McHardy | 9dfebcc | 2008-01-21 00:26:07 -0800 | [diff] [blame] | 241 | struct vlan_dev_info *vlan = vlan_dev_info(dev); |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 242 | struct net_device *real_dev = vlan->real_dev; |
| 243 | unsigned short vlan_id = vlan->vlan_id; |
| 244 | struct vlan_group *grp, *ngrp = NULL; |
| 245 | int err; |
| 246 | |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 247 | grp = __vlan_find_group(real_dev); |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 248 | if (!grp) { |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 249 | ngrp = grp = vlan_group_alloc(real_dev); |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 250 | if (!grp) |
| 251 | return -ENOBUFS; |
| 252 | } |
| 253 | |
Pavel Emelyanov | 6772718 | 2008-03-26 16:27:22 -0700 | [diff] [blame] | 254 | err = vlan_group_prealloc_vid(grp, vlan_id); |
| 255 | if (err < 0) |
| 256 | goto out_free_group; |
| 257 | |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 258 | err = register_netdevice(dev); |
| 259 | if (err < 0) |
| 260 | goto out_free_group; |
| 261 | |
| 262 | /* Account for reference in struct vlan_dev_info */ |
| 263 | dev_hold(real_dev); |
| 264 | |
| 265 | vlan_transfer_operstate(real_dev, dev); |
| 266 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
| 267 | |
| 268 | /* So, got the sucker initialized, now lets place |
| 269 | * it into our local structure. |
| 270 | */ |
| 271 | vlan_group_set_device(grp, vlan_id, dev); |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 272 | grp->nr_vlans++; |
| 273 | |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 274 | if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) |
| 275 | real_dev->vlan_rx_register(real_dev, ngrp); |
| 276 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
| 277 | real_dev->vlan_rx_add_vid(real_dev, vlan_id); |
| 278 | |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 279 | return 0; |
| 280 | |
| 281 | out_free_group: |
| 282 | if (ngrp) |
| 283 | vlan_group_free(ngrp); |
| 284 | return err; |
| 285 | } |
| 286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 288 | * 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] | 289 | */ |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 290 | static int register_vlan_device(struct net_device *real_dev, |
| 291 | unsigned short VLAN_ID) |
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 | struct net_device *new_dev; |
Pavel Emelyanov | 7a17a2f | 2008-04-16 00:54:39 -0700 | [diff] [blame] | 294 | struct net *net = dev_net(real_dev); |
| 295 | struct vlan_net *vn = net_generic(net, vlan_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | char name[IFNAMSIZ]; |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 297 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | if (VLAN_ID >= VLAN_VID_MASK) |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 300 | return -ERANGE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 302 | err = vlan_check_real_dev(real_dev, VLAN_ID); |
| 303 | if (err < 0) |
| 304 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
| 306 | /* Gotta set up the fields for the device. */ |
Pavel Emelyanov | 7a17a2f | 2008-04-16 00:54:39 -0700 | [diff] [blame] | 307 | switch (vn->name_type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
| 309 | /* name will look like: eth1.0005 */ |
| 310 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID); |
| 311 | break; |
| 312 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: |
| 313 | /* Put our vlan.VID in the name. |
| 314 | * Name will look like: vlan5 |
| 315 | */ |
| 316 | snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID); |
| 317 | break; |
| 318 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: |
| 319 | /* Put our vlan.VID in the name. |
| 320 | * Name will look like: eth0.5 |
| 321 | */ |
| 322 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID); |
| 323 | break; |
| 324 | case VLAN_NAME_TYPE_PLUS_VID: |
| 325 | /* Put our vlan.VID in the name. |
| 326 | * Name will look like: vlan0005 |
| 327 | */ |
| 328 | default: |
| 329 | snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID); |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 330 | } |
YOSHIFUJI Hideaki | 122952f | 2007-02-09 23:24:25 +0900 | [diff] [blame] | 331 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, |
| 333 | vlan_setup); |
Arjan van de Ven | 5dd8d1e | 2006-07-03 00:25:33 -0700 | [diff] [blame] | 334 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | if (new_dev == NULL) |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 336 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
Pavel Emelyanov | 65d292a | 2008-04-16 00:55:06 -0700 | [diff] [blame] | 338 | dev_net_set(new_dev, net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | /* need 4 bytes for extra VLAN header info, |
| 340 | * hope the underlying device can handle it. |
| 341 | */ |
| 342 | new_dev->mtu = real_dev->mtu; |
| 343 | |
Patrick McHardy | 9dfebcc | 2008-01-21 00:26:07 -0800 | [diff] [blame] | 344 | vlan_dev_info(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */ |
| 345 | vlan_dev_info(new_dev)->real_dev = real_dev; |
| 346 | vlan_dev_info(new_dev)->dent = NULL; |
| 347 | vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | |
Patrick McHardy | 07b5b17 | 2007-06-13 12:07:54 -0700 | [diff] [blame] | 349 | new_dev->rtnl_link_ops = &vlan_link_ops; |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 350 | err = register_vlan_dev(new_dev); |
| 351 | if (err < 0) |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 352 | goto out_free_newdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 354 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | out_free_newdev: |
| 357 | free_netdev(new_dev); |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 358 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | } |
| 360 | |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 361 | static void vlan_sync_address(struct net_device *dev, |
| 362 | struct net_device *vlandev) |
| 363 | { |
Patrick McHardy | 9dfebcc | 2008-01-21 00:26:07 -0800 | [diff] [blame] | 364 | struct vlan_dev_info *vlan = vlan_dev_info(vlandev); |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 365 | |
| 366 | /* May be called without an actual change */ |
| 367 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) |
| 368 | return; |
| 369 | |
| 370 | /* vlan address was different from the old address and is equal to |
| 371 | * the new address */ |
| 372 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && |
| 373 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) |
| 374 | dev_unicast_delete(dev, vlandev->dev_addr, ETH_ALEN); |
| 375 | |
| 376 | /* vlan address was equal to the old address and is different from |
| 377 | * the new address */ |
| 378 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && |
| 379 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) |
| 380 | dev_unicast_add(dev, vlandev->dev_addr, ETH_ALEN); |
| 381 | |
| 382 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); |
| 383 | } |
| 384 | |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 385 | static void __vlan_device_event(struct net_device *dev, unsigned long event) |
| 386 | { |
| 387 | switch (event) { |
| 388 | case NETDEV_CHANGENAME: |
| 389 | vlan_proc_rem_dev(dev); |
| 390 | if (vlan_proc_add_dev(dev) < 0) |
| 391 | pr_warning("8021q: failed to change proc name for %s\n", |
| 392 | dev->name); |
| 393 | break; |
Pavel Emelyanov | 30688a9 | 2008-04-16 00:57:01 -0700 | [diff] [blame^] | 394 | case NETDEV_REGISTER: |
| 395 | if (vlan_proc_add_dev(dev) < 0) |
| 396 | pr_warning("8021q: failed to add proc entry for %s\n", |
| 397 | dev->name); |
| 398 | break; |
| 399 | case NETDEV_UNREGISTER: |
| 400 | vlan_proc_rem_dev(dev); |
| 401 | break; |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 402 | } |
| 403 | } |
| 404 | |
Patrick McHardy | 2029cc2 | 2008-01-21 00:26:41 -0800 | [diff] [blame] | 405 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, |
| 406 | void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | { |
| 408 | struct net_device *dev = ptr; |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 409 | struct vlan_group *grp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | int i, flgs; |
| 411 | struct net_device *vlandev; |
| 412 | |
Pavel Emelyanov | 802fb17 | 2008-04-02 00:08:01 -0700 | [diff] [blame] | 413 | if (is_vlan_dev(dev)) { |
| 414 | __vlan_device_event(dev, event); |
| 415 | goto out; |
| 416 | } |
| 417 | |
Pavel Emelyanov | a9fde26 | 2008-04-16 00:48:04 -0700 | [diff] [blame] | 418 | grp = __vlan_find_group(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | if (!grp) |
| 420 | goto out; |
| 421 | |
| 422 | /* It is OK that we do not hold the group lock right now, |
| 423 | * as we run under the RTNL lock. |
| 424 | */ |
| 425 | |
| 426 | switch (event) { |
| 427 | case NETDEV_CHANGE: |
| 428 | /* Propagate real device state to vlan devices */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 430 | vlandev = vlan_group_get_device(grp, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | if (!vlandev) |
| 432 | continue; |
| 433 | |
Stefan Rompf | ddd7bf9 | 2006-03-20 17:11:41 -0800 | [diff] [blame] | 434 | vlan_transfer_operstate(dev, vlandev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | } |
| 436 | break; |
| 437 | |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 438 | case NETDEV_CHANGEADDR: |
| 439 | /* Adjust unicast filters on underlying device */ |
| 440 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
| 441 | vlandev = vlan_group_get_device(grp, i); |
| 442 | if (!vlandev) |
| 443 | continue; |
| 444 | |
Patrick McHardy | d932e04 | 2007-11-10 21:51:40 -0800 | [diff] [blame] | 445 | flgs = vlandev->flags; |
| 446 | if (!(flgs & IFF_UP)) |
| 447 | continue; |
| 448 | |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 449 | vlan_sync_address(dev, vlandev); |
| 450 | } |
| 451 | break; |
| 452 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | case NETDEV_DOWN: |
| 454 | /* Put all VLANs for this dev in the down state too. */ |
| 455 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 456 | vlandev = vlan_group_get_device(grp, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | if (!vlandev) |
| 458 | continue; |
| 459 | |
| 460 | flgs = vlandev->flags; |
| 461 | if (!(flgs & IFF_UP)) |
| 462 | continue; |
| 463 | |
| 464 | dev_change_flags(vlandev, flgs & ~IFF_UP); |
| 465 | } |
| 466 | break; |
| 467 | |
| 468 | case NETDEV_UP: |
| 469 | /* Put all VLANs for this dev in the up state too. */ |
| 470 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 471 | vlandev = vlan_group_get_device(grp, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | if (!vlandev) |
| 473 | continue; |
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 | flgs = vlandev->flags; |
| 476 | if (flgs & IFF_UP) |
| 477 | continue; |
| 478 | |
| 479 | dev_change_flags(vlandev, flgs | IFF_UP); |
| 480 | } |
| 481 | break; |
YOSHIFUJI Hideaki | 122952f | 2007-02-09 23:24:25 +0900 | [diff] [blame] | 482 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | case NETDEV_UNREGISTER: |
| 484 | /* Delete all VLANs for this dev. */ |
| 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 | |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 490 | /* unregistration of last vlan destroys group, abort |
| 491 | * afterwards */ |
| 492 | if (grp->nr_vlans == 1) |
| 493 | i = VLAN_GROUP_ARRAY_LEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 495 | unregister_vlan_dev(vlandev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | } |
| 497 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 498 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | |
| 500 | out: |
| 501 | return NOTIFY_DONE; |
| 502 | } |
| 503 | |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 504 | static struct notifier_block vlan_notifier_block __read_mostly = { |
| 505 | .notifier_call = vlan_device_event, |
| 506 | }; |
| 507 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | /* |
| 509 | * VLAN IOCTL handler. |
| 510 | * o execute requested action or pass command to the device driver |
| 511 | * arg is really a struct vlan_ioctl_args __user *. |
| 512 | */ |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 513 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | { |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 515 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | unsigned short vid = 0; |
| 517 | struct vlan_ioctl_args args; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 518 | struct net_device *dev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | |
| 520 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) |
| 521 | return -EFAULT; |
| 522 | |
| 523 | /* Null terminate this sucker, just in case. */ |
| 524 | args.device1[23] = 0; |
| 525 | args.u.device2[23] = 0; |
| 526 | |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 527 | rtnl_lock(); |
| 528 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | switch (args.cmd) { |
| 530 | case SET_VLAN_INGRESS_PRIORITY_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 531 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
| 532 | case SET_VLAN_FLAG_CMD: |
| 533 | case ADD_VLAN_CMD: |
| 534 | case DEL_VLAN_CMD: |
| 535 | case GET_VLAN_REALDEV_NAME_CMD: |
| 536 | case GET_VLAN_VID_CMD: |
| 537 | err = -ENODEV; |
Pavel Emelyanov | 65d292a | 2008-04-16 00:55:06 -0700 | [diff] [blame] | 538 | dev = __dev_get_by_name(net, args.device1); |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 539 | if (!dev) |
| 540 | goto out; |
| 541 | |
| 542 | err = -EINVAL; |
| 543 | if (args.cmd != ADD_VLAN_CMD && |
| 544 | !(dev->priv_flags & IFF_802_1Q_VLAN)) |
| 545 | goto out; |
| 546 | } |
| 547 | |
| 548 | switch (args.cmd) { |
| 549 | case SET_VLAN_INGRESS_PRIORITY_CMD: |
| 550 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | if (!capable(CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 552 | break; |
| 553 | vlan_dev_set_ingress_priority(dev, |
| 554 | args.u.skb_priority, |
| 555 | args.vlan_qos); |
Patrick McHardy | fffe470 | 2007-11-07 01:31:32 -0800 | [diff] [blame] | 556 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | break; |
| 558 | |
| 559 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 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 | err = vlan_dev_set_egress_priority(dev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | args.u.skb_priority, |
| 565 | args.vlan_qos); |
| 566 | break; |
| 567 | |
| 568 | case SET_VLAN_FLAG_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 569 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | if (!capable(CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 571 | break; |
| 572 | err = vlan_dev_set_vlan_flag(dev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | args.u.flag, |
| 574 | args.vlan_qos); |
| 575 | break; |
| 576 | |
| 577 | case SET_VLAN_NAME_TYPE_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 578 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | if (!capable(CAP_NET_ADMIN)) |
Pavel Emelyanov | e35de02 | 2007-12-06 22:52:16 -0800 | [diff] [blame] | 580 | break; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 581 | if ((args.u.name_type >= 0) && |
| 582 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { |
Pavel Emelyanov | 7a17a2f | 2008-04-16 00:54:39 -0700 | [diff] [blame] | 583 | struct vlan_net *vn; |
| 584 | |
| 585 | vn = net_generic(net, vlan_net_id); |
| 586 | vn->name_type = args.u.name_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | err = 0; |
| 588 | } else { |
| 589 | err = -EINVAL; |
| 590 | } |
| 591 | break; |
| 592 | |
| 593 | case ADD_VLAN_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 594 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | if (!capable(CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 596 | break; |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 597 | err = register_vlan_device(dev, args.u.VID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | break; |
| 599 | |
| 600 | case DEL_VLAN_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 601 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | if (!capable(CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 603 | break; |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame] | 604 | unregister_vlan_dev(dev); |
| 605 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | break; |
| 607 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | case GET_VLAN_REALDEV_NAME_CMD: |
Andrew Morton | 3f5f434 | 2007-07-24 15:37:11 -0700 | [diff] [blame] | 609 | err = 0; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 610 | vlan_dev_get_realdev_name(dev, args.u.device2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | if (copy_to_user(arg, &args, |
Patrick McHardy | 2029cc2 | 2008-01-21 00:26:41 -0800 | [diff] [blame] | 612 | sizeof(struct vlan_ioctl_args))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | err = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | break; |
| 615 | |
| 616 | case GET_VLAN_VID_CMD: |
Andrew Morton | 3f5f434 | 2007-07-24 15:37:11 -0700 | [diff] [blame] | 617 | err = 0; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 618 | vlan_dev_get_vid(dev, &vid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | args.u.VID = vid; |
| 620 | if (copy_to_user(arg, &args, |
Patrick McHardy | 2029cc2 | 2008-01-21 00:26:41 -0800 | [diff] [blame] | 621 | sizeof(struct vlan_ioctl_args))) |
YOSHIFUJI Hideaki | 122952f | 2007-02-09 23:24:25 +0900 | [diff] [blame] | 622 | err = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | break; |
| 624 | |
| 625 | default: |
Patrick McHardy | 198a291 | 2008-01-21 00:24:59 -0800 | [diff] [blame] | 626 | err = -EOPNOTSUPP; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 627 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 628 | } |
Mika Kukkonen | 7eb1b3d | 2005-12-21 18:39:49 -0800 | [diff] [blame] | 629 | out: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 630 | rtnl_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | return err; |
| 632 | } |
| 633 | |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 634 | static int vlan_init_net(struct net *net) |
| 635 | { |
| 636 | int err; |
| 637 | struct vlan_net *vn; |
| 638 | |
| 639 | err = -ENOMEM; |
| 640 | vn = kzalloc(sizeof(struct vlan_net), GFP_KERNEL); |
| 641 | if (vn == NULL) |
| 642 | goto err_alloc; |
| 643 | |
| 644 | err = net_assign_generic(net, vlan_net_id, vn); |
| 645 | if (err < 0) |
| 646 | goto err_assign; |
| 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); |
| 651 | if (err < 0) |
| 652 | goto err_proc; |
| 653 | |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 654 | return 0; |
| 655 | |
Pavel Emelyanov | cd1c701 | 2008-04-16 00:51:12 -0700 | [diff] [blame] | 656 | err_proc: |
| 657 | /* nothing */ |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 658 | err_assign: |
| 659 | kfree(vn); |
| 660 | err_alloc: |
| 661 | return err; |
| 662 | } |
| 663 | |
| 664 | static void vlan_exit_net(struct net *net) |
| 665 | { |
| 666 | struct vlan_net *vn; |
| 667 | |
| 668 | vn = net_generic(net, vlan_net_id); |
Pavel Emelyanov | 65d292a | 2008-04-16 00:55:06 -0700 | [diff] [blame] | 669 | rtnl_kill_links(net, &vlan_link_ops); |
Pavel Emelyanov | cd1c701 | 2008-04-16 00:51:12 -0700 | [diff] [blame] | 670 | vlan_proc_cleanup(net); |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 671 | kfree(vn); |
| 672 | } |
| 673 | |
| 674 | static struct pernet_operations vlan_net_ops = { |
| 675 | .init = vlan_init_net, |
| 676 | .exit = vlan_exit_net, |
| 677 | }; |
| 678 | |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 679 | static int __init vlan_proto_init(void) |
| 680 | { |
| 681 | int err; |
| 682 | |
| 683 | pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); |
| 684 | pr_info("All bugs added by %s\n", vlan_buggyright); |
| 685 | |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 686 | err = register_pernet_gen_device(&vlan_net_id, &vlan_net_ops); |
| 687 | if (err < 0) |
| 688 | goto err0; |
| 689 | |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 690 | err = register_netdevice_notifier(&vlan_notifier_block); |
| 691 | if (err < 0) |
| 692 | goto err2; |
| 693 | |
| 694 | err = vlan_netlink_init(); |
| 695 | if (err < 0) |
| 696 | goto err3; |
| 697 | |
| 698 | dev_add_pack(&vlan_packet_type); |
| 699 | vlan_ioctl_set(vlan_ioctl_handler); |
| 700 | return 0; |
| 701 | |
| 702 | err3: |
| 703 | unregister_netdevice_notifier(&vlan_notifier_block); |
| 704 | err2: |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 705 | unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops); |
| 706 | err0: |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 707 | return err; |
| 708 | } |
| 709 | |
| 710 | static void __exit vlan_cleanup_module(void) |
| 711 | { |
| 712 | unsigned int i; |
| 713 | |
| 714 | vlan_ioctl_set(NULL); |
| 715 | vlan_netlink_fini(); |
| 716 | |
| 717 | unregister_netdevice_notifier(&vlan_notifier_block); |
| 718 | |
| 719 | dev_remove_pack(&vlan_packet_type); |
| 720 | |
| 721 | /* This table must be empty if there are no module references left. */ |
| 722 | for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) |
| 723 | BUG_ON(!hlist_empty(&vlan_group_hash[i])); |
| 724 | |
Pavel Emelyanov | d9ed0f0 | 2008-04-16 00:49:09 -0700 | [diff] [blame] | 725 | unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops); |
| 726 | |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 727 | synchronize_net(); |
| 728 | } |
| 729 | |
| 730 | module_init(vlan_proto_init); |
| 731 | module_exit(vlan_cleanup_module); |
| 732 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | MODULE_LICENSE("GPL"); |
| 734 | MODULE_VERSION(DRV_VERSION); |