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> |
| 6 | * Please send support related email to: vlan@scry.wanfear.com |
| 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> |
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 | |
| 44 | /* Our listing of VLAN group(s) */ |
| 45 | static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE]; |
| 46 | #define vlan_grp_hashfn(IDX) ((((IDX) >> VLAN_GRP_HASH_SHIFT) ^ (IDX)) & VLAN_GRP_HASH_MASK) |
| 47 | |
| 48 | static char vlan_fullname[] = "802.1Q VLAN Support"; |
| 49 | static char vlan_version[] = DRV_VERSION; |
| 50 | static char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; |
| 51 | static char vlan_buggyright[] = "David S. Miller <davem@redhat.com>"; |
| 52 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | /* Determines interface naming scheme. */ |
| 54 | unsigned short vlan_name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; |
| 55 | |
| 56 | static struct packet_type vlan_packet_type = { |
| 57 | .type = __constant_htons(ETH_P_8021Q), |
| 58 | .func = vlan_skb_recv, /* VLAN receive method */ |
| 59 | }; |
| 60 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | /* End of global variables definitions. */ |
| 62 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | /* Must be invoked with RCU read lock (no preempt) */ |
| 64 | static struct vlan_group *__vlan_find_group(int real_dev_ifindex) |
| 65 | { |
| 66 | struct vlan_group *grp; |
| 67 | struct hlist_node *n; |
| 68 | int hash = vlan_grp_hashfn(real_dev_ifindex); |
| 69 | |
| 70 | hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) { |
| 71 | if (grp->real_dev_ifindex == real_dev_ifindex) |
| 72 | return grp; |
| 73 | } |
| 74 | |
| 75 | return NULL; |
| 76 | } |
| 77 | |
| 78 | /* Find the protocol handler. Assumes VID < VLAN_VID_MASK. |
| 79 | * |
| 80 | * Must be invoked with RCU read lock (no preempt) |
| 81 | */ |
| 82 | struct net_device *__find_vlan_dev(struct net_device *real_dev, |
| 83 | unsigned short VID) |
| 84 | { |
| 85 | struct vlan_group *grp = __vlan_find_group(real_dev->ifindex); |
| 86 | |
| 87 | if (grp) |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 88 | return vlan_group_get_device(grp, VID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
| 90 | return NULL; |
| 91 | } |
| 92 | |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 93 | static void vlan_group_free(struct vlan_group *grp) |
| 94 | { |
| 95 | int i; |
| 96 | |
| 97 | for (i=0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) |
| 98 | kfree(grp->vlan_devices_arrays[i]); |
| 99 | kfree(grp); |
| 100 | } |
| 101 | |
Patrick McHardy | 42429aa | 2007-06-13 12:05:59 -0700 | [diff] [blame] | 102 | static struct vlan_group *vlan_group_alloc(int ifindex) |
| 103 | { |
| 104 | struct vlan_group *grp; |
| 105 | unsigned int size; |
| 106 | unsigned int i; |
| 107 | |
| 108 | grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); |
| 109 | if (!grp) |
| 110 | return NULL; |
| 111 | |
| 112 | size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; |
| 113 | |
| 114 | for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) { |
| 115 | grp->vlan_devices_arrays[i] = kzalloc(size, GFP_KERNEL); |
| 116 | if (!grp->vlan_devices_arrays[i]) |
| 117 | goto err; |
| 118 | } |
| 119 | |
| 120 | grp->real_dev_ifindex = ifindex; |
| 121 | hlist_add_head_rcu(&grp->hlist, |
| 122 | &vlan_group_hash[vlan_grp_hashfn(ifindex)]); |
| 123 | return grp; |
| 124 | |
| 125 | err: |
| 126 | vlan_group_free(grp); |
| 127 | return NULL; |
| 128 | } |
| 129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | static void vlan_rcu_free(struct rcu_head *rcu) |
| 131 | { |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 132 | vlan_group_free(container_of(rcu, struct vlan_group, rcu)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | } |
| 134 | |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame^] | 135 | void unregister_vlan_dev(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | { |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame^] | 137 | struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev); |
| 138 | struct net_device *real_dev = vlan->real_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | struct vlan_group *grp; |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame^] | 140 | unsigned short vlan_id = vlan->vlan_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | |
| 142 | ASSERT_RTNL(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame^] | 144 | grp = __vlan_find_group(real_dev->ifindex); |
| 145 | BUG_ON(!grp); |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 146 | |
| 147 | vlan_proc_rem_dev(dev); |
| 148 | |
| 149 | /* Take it out of our own structures, but be sure to interlock with |
| 150 | * HW accelerating devices or SW vlan input packet processing. |
| 151 | */ |
| 152 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
| 153 | real_dev->vlan_rx_kill_vid(real_dev, vlan_id); |
| 154 | |
| 155 | vlan_group_set_device(grp, vlan_id, NULL); |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame^] | 156 | grp->nr_vlans--; |
| 157 | |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 158 | synchronize_net(); |
| 159 | |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 160 | /* If the group is now empty, kill off the group. */ |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame^] | 161 | if (grp->nr_vlans == 0) { |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 162 | if (real_dev->features & NETIF_F_HW_VLAN_RX) |
| 163 | real_dev->vlan_rx_register(real_dev, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 165 | hlist_del_rcu(&grp->hlist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
Patrick McHardy | acc5efb | 2008-01-21 00:25:31 -0800 | [diff] [blame] | 167 | /* Free the group, after all cpu's are done. */ |
| 168 | call_rcu(&grp->rcu, vlan_rcu_free); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | } |
| 170 | |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame^] | 171 | /* Get rid of the vlan's reference to real_dev */ |
| 172 | dev_put(real_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 174 | unregister_netdevice(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | } |
| 176 | |
Stefan Rompf | ddd7bf9 | 2006-03-20 17:11:41 -0800 | [diff] [blame] | 177 | static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev) |
| 178 | { |
| 179 | /* Have to respect userspace enforced dormant state |
| 180 | * of real device, also must allow supplicant running |
| 181 | * on VLAN device |
| 182 | */ |
| 183 | if (dev->operstate == IF_OPER_DORMANT) |
| 184 | netif_dormant_on(vlandev); |
| 185 | else |
| 186 | netif_dormant_off(vlandev); |
| 187 | |
| 188 | if (netif_carrier_ok(dev)) { |
| 189 | if (!netif_carrier_ok(vlandev)) |
| 190 | netif_carrier_on(vlandev); |
| 191 | } else { |
| 192 | if (netif_carrier_ok(vlandev)) |
| 193 | netif_carrier_off(vlandev); |
| 194 | } |
| 195 | } |
| 196 | |
Patrick McHardy | 07b5b17 | 2007-06-13 12:07:54 -0700 | [diff] [blame] | 197 | 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] | 198 | { |
Patrick McHardy | 40f98e1 | 2008-01-21 00:24:30 -0800 | [diff] [blame] | 199 | char *name = real_dev->name; |
| 200 | |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 201 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { |
Patrick McHardy | 40f98e1 | 2008-01-21 00:24:30 -0800 | [diff] [blame] | 202 | pr_info("8021q: VLANs not supported on %s\n", name); |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 203 | return -EOPNOTSUPP; |
| 204 | } |
| 205 | |
| 206 | if ((real_dev->features & NETIF_F_HW_VLAN_RX) && |
| 207 | !real_dev->vlan_rx_register) { |
Patrick McHardy | 40f98e1 | 2008-01-21 00:24:30 -0800 | [diff] [blame] | 208 | pr_info("8021q: device %s has buggy VLAN hw accel\n", name); |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 209 | return -EOPNOTSUPP; |
| 210 | } |
| 211 | |
| 212 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && |
| 213 | (!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) { |
Patrick McHardy | 40f98e1 | 2008-01-21 00:24:30 -0800 | [diff] [blame] | 214 | pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 215 | return -EOPNOTSUPP; |
| 216 | } |
| 217 | |
| 218 | /* The real device must be up and operating in order to |
| 219 | * assosciate a VLAN device with it. |
| 220 | */ |
| 221 | if (!(real_dev->flags & IFF_UP)) |
| 222 | return -ENETDOWN; |
| 223 | |
Patrick McHardy | 40f98e1 | 2008-01-21 00:24:30 -0800 | [diff] [blame] | 224 | if (__find_vlan_dev(real_dev, vlan_id) != NULL) |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 225 | return -EEXIST; |
Patrick McHardy | c1d3ee9 | 2007-06-13 12:06:14 -0700 | [diff] [blame] | 226 | |
| 227 | return 0; |
| 228 | } |
| 229 | |
Patrick McHardy | 07b5b17 | 2007-06-13 12:07:54 -0700 | [diff] [blame] | 230 | int register_vlan_dev(struct net_device *dev) |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 231 | { |
| 232 | struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev); |
| 233 | struct net_device *real_dev = vlan->real_dev; |
| 234 | unsigned short vlan_id = vlan->vlan_id; |
| 235 | struct vlan_group *grp, *ngrp = NULL; |
| 236 | int err; |
| 237 | |
| 238 | grp = __vlan_find_group(real_dev->ifindex); |
| 239 | if (!grp) { |
| 240 | ngrp = grp = vlan_group_alloc(real_dev->ifindex); |
| 241 | if (!grp) |
| 242 | return -ENOBUFS; |
| 243 | } |
| 244 | |
| 245 | err = register_netdevice(dev); |
| 246 | if (err < 0) |
| 247 | goto out_free_group; |
| 248 | |
| 249 | /* Account for reference in struct vlan_dev_info */ |
| 250 | dev_hold(real_dev); |
| 251 | |
| 252 | vlan_transfer_operstate(real_dev, dev); |
| 253 | linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ |
| 254 | |
| 255 | /* So, got the sucker initialized, now lets place |
| 256 | * it into our local structure. |
| 257 | */ |
| 258 | vlan_group_set_device(grp, vlan_id, dev); |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame^] | 259 | grp->nr_vlans++; |
| 260 | |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 261 | if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) |
| 262 | real_dev->vlan_rx_register(real_dev, ngrp); |
| 263 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) |
| 264 | real_dev->vlan_rx_add_vid(real_dev, vlan_id); |
| 265 | |
| 266 | if (vlan_proc_add_dev(dev) < 0) |
Patrick McHardy | 40f98e1 | 2008-01-21 00:24:30 -0800 | [diff] [blame] | 267 | pr_warning("8021q: failed to add proc entry for %s\n", |
| 268 | dev->name); |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 269 | return 0; |
| 270 | |
| 271 | out_free_group: |
| 272 | if (ngrp) |
| 273 | vlan_group_free(ngrp); |
| 274 | return err; |
| 275 | } |
| 276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | /* Attach a VLAN device to a mac address (ie Ethernet Card). |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 278 | * 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] | 279 | */ |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 280 | static int register_vlan_device(struct net_device *real_dev, |
| 281 | unsigned short VLAN_ID) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | struct net_device *new_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | char name[IFNAMSIZ]; |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 285 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | if (VLAN_ID >= VLAN_VID_MASK) |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 288 | return -ERANGE; |
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 | err = vlan_check_real_dev(real_dev, VLAN_ID); |
| 291 | if (err < 0) |
| 292 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
| 294 | /* Gotta set up the fields for the device. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | switch (vlan_name_type) { |
| 296 | case VLAN_NAME_TYPE_RAW_PLUS_VID: |
| 297 | /* name will look like: eth1.0005 */ |
| 298 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID); |
| 299 | break; |
| 300 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: |
| 301 | /* Put our vlan.VID in the name. |
| 302 | * Name will look like: vlan5 |
| 303 | */ |
| 304 | snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID); |
| 305 | break; |
| 306 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: |
| 307 | /* Put our vlan.VID in the name. |
| 308 | * Name will look like: eth0.5 |
| 309 | */ |
| 310 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID); |
| 311 | break; |
| 312 | case VLAN_NAME_TYPE_PLUS_VID: |
| 313 | /* Put our vlan.VID in the name. |
| 314 | * Name will look like: vlan0005 |
| 315 | */ |
| 316 | default: |
| 317 | snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID); |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 318 | } |
YOSHIFUJI Hideaki | 122952f | 2007-02-09 23:24:25 +0900 | [diff] [blame] | 319 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, |
| 321 | vlan_setup); |
Arjan van de Ven | 5dd8d1e | 2006-07-03 00:25:33 -0700 | [diff] [blame] | 322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | if (new_dev == NULL) |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 324 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | /* need 4 bytes for extra VLAN header info, |
| 327 | * hope the underlying device can handle it. |
| 328 | */ |
| 329 | new_dev->mtu = real_dev->mtu; |
| 330 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | VLAN_DEV_INFO(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */ |
| 332 | VLAN_DEV_INFO(new_dev)->real_dev = real_dev; |
| 333 | VLAN_DEV_INFO(new_dev)->dent = NULL; |
Patrick McHardy | a4bf3af4 | 2007-06-13 12:07:37 -0700 | [diff] [blame] | 334 | VLAN_DEV_INFO(new_dev)->flags = VLAN_FLAG_REORDER_HDR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | |
Patrick McHardy | 07b5b17 | 2007-06-13 12:07:54 -0700 | [diff] [blame] | 336 | new_dev->rtnl_link_ops = &vlan_link_ops; |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 337 | err = register_vlan_dev(new_dev); |
| 338 | if (err < 0) |
Patrick McHardy | e89fe42 | 2007-06-13 12:06:29 -0700 | [diff] [blame] | 339 | goto out_free_newdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 341 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | out_free_newdev: |
| 344 | free_netdev(new_dev); |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 345 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | } |
| 347 | |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 348 | static void vlan_sync_address(struct net_device *dev, |
| 349 | struct net_device *vlandev) |
| 350 | { |
| 351 | struct vlan_dev_info *vlan = VLAN_DEV_INFO(vlandev); |
| 352 | |
| 353 | /* May be called without an actual change */ |
| 354 | if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) |
| 355 | return; |
| 356 | |
| 357 | /* vlan address was different from the old address and is equal to |
| 358 | * the new address */ |
| 359 | if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && |
| 360 | !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) |
| 361 | dev_unicast_delete(dev, vlandev->dev_addr, ETH_ALEN); |
| 362 | |
| 363 | /* vlan address was equal to the old address and is different from |
| 364 | * the new address */ |
| 365 | if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && |
| 366 | compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) |
| 367 | dev_unicast_add(dev, vlandev->dev_addr, ETH_ALEN); |
| 368 | |
| 369 | memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); |
| 370 | } |
| 371 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr) |
| 373 | { |
| 374 | struct net_device *dev = ptr; |
| 375 | struct vlan_group *grp = __vlan_find_group(dev->ifindex); |
| 376 | int i, flgs; |
| 377 | struct net_device *vlandev; |
| 378 | |
Eric W. Biederman | e9dc865 | 2007-09-12 13:02:17 +0200 | [diff] [blame] | 379 | if (dev->nd_net != &init_net) |
| 380 | return NOTIFY_DONE; |
| 381 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | if (!grp) |
| 383 | goto out; |
| 384 | |
| 385 | /* It is OK that we do not hold the group lock right now, |
| 386 | * as we run under the RTNL lock. |
| 387 | */ |
| 388 | |
| 389 | switch (event) { |
| 390 | case NETDEV_CHANGE: |
| 391 | /* Propagate real device state to vlan devices */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 393 | vlandev = vlan_group_get_device(grp, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | if (!vlandev) |
| 395 | continue; |
| 396 | |
Stefan Rompf | ddd7bf9 | 2006-03-20 17:11:41 -0800 | [diff] [blame] | 397 | vlan_transfer_operstate(dev, vlandev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | } |
| 399 | break; |
| 400 | |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 401 | case NETDEV_CHANGEADDR: |
| 402 | /* Adjust unicast filters on underlying device */ |
| 403 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
| 404 | vlandev = vlan_group_get_device(grp, i); |
| 405 | if (!vlandev) |
| 406 | continue; |
| 407 | |
Patrick McHardy | d932e04 | 2007-11-10 21:51:40 -0800 | [diff] [blame] | 408 | flgs = vlandev->flags; |
| 409 | if (!(flgs & IFF_UP)) |
| 410 | continue; |
| 411 | |
Patrick McHardy | 8c979c2 | 2007-07-11 19:45:24 -0700 | [diff] [blame] | 412 | vlan_sync_address(dev, vlandev); |
| 413 | } |
| 414 | break; |
| 415 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | case NETDEV_DOWN: |
| 417 | /* Put all VLANs for this dev in the down state too. */ |
| 418 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 419 | vlandev = vlan_group_get_device(grp, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | if (!vlandev) |
| 421 | continue; |
| 422 | |
| 423 | flgs = vlandev->flags; |
| 424 | if (!(flgs & IFF_UP)) |
| 425 | continue; |
| 426 | |
| 427 | dev_change_flags(vlandev, flgs & ~IFF_UP); |
| 428 | } |
| 429 | break; |
| 430 | |
| 431 | case NETDEV_UP: |
| 432 | /* Put all VLANs for this dev in the up state too. */ |
| 433 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 434 | vlandev = vlan_group_get_device(grp, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | if (!vlandev) |
| 436 | continue; |
YOSHIFUJI Hideaki | 122952f | 2007-02-09 23:24:25 +0900 | [diff] [blame] | 437 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | flgs = vlandev->flags; |
| 439 | if (flgs & IFF_UP) |
| 440 | continue; |
| 441 | |
| 442 | dev_change_flags(vlandev, flgs | IFF_UP); |
| 443 | } |
| 444 | break; |
YOSHIFUJI Hideaki | 122952f | 2007-02-09 23:24:25 +0900 | [diff] [blame] | 445 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | case NETDEV_UNREGISTER: |
| 447 | /* Delete all VLANs for this dev. */ |
| 448 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { |
Dan Aloni | 5c15bde | 2007-03-02 20:44:51 -0800 | [diff] [blame] | 449 | vlandev = vlan_group_get_device(grp, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | if (!vlandev) |
| 451 | continue; |
| 452 | |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame^] | 453 | /* unregistration of last vlan destroys group, abort |
| 454 | * afterwards */ |
| 455 | if (grp->nr_vlans == 1) |
| 456 | i = VLAN_GROUP_ARRAY_LEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame^] | 458 | unregister_vlan_dev(vlandev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | } |
| 460 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 461 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | |
| 463 | out: |
| 464 | return NOTIFY_DONE; |
| 465 | } |
| 466 | |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 467 | static struct notifier_block vlan_notifier_block __read_mostly = { |
| 468 | .notifier_call = vlan_device_event, |
| 469 | }; |
| 470 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | /* |
| 472 | * VLAN IOCTL handler. |
| 473 | * o execute requested action or pass command to the device driver |
| 474 | * arg is really a struct vlan_ioctl_args __user *. |
| 475 | */ |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 476 | static int vlan_ioctl_handler(struct net *net, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | { |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 478 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | unsigned short vid = 0; |
| 480 | struct vlan_ioctl_args args; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 481 | struct net_device *dev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | |
| 483 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) |
| 484 | return -EFAULT; |
| 485 | |
| 486 | /* Null terminate this sucker, just in case. */ |
| 487 | args.device1[23] = 0; |
| 488 | args.u.device2[23] = 0; |
| 489 | |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 490 | rtnl_lock(); |
| 491 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | switch (args.cmd) { |
| 493 | case SET_VLAN_INGRESS_PRIORITY_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 494 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
| 495 | case SET_VLAN_FLAG_CMD: |
| 496 | case ADD_VLAN_CMD: |
| 497 | case DEL_VLAN_CMD: |
| 498 | case GET_VLAN_REALDEV_NAME_CMD: |
| 499 | case GET_VLAN_VID_CMD: |
| 500 | err = -ENODEV; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 501 | dev = __dev_get_by_name(&init_net, args.device1); |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 502 | if (!dev) |
| 503 | goto out; |
| 504 | |
| 505 | err = -EINVAL; |
| 506 | if (args.cmd != ADD_VLAN_CMD && |
| 507 | !(dev->priv_flags & IFF_802_1Q_VLAN)) |
| 508 | goto out; |
| 509 | } |
| 510 | |
| 511 | switch (args.cmd) { |
| 512 | case SET_VLAN_INGRESS_PRIORITY_CMD: |
| 513 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | if (!capable(CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 515 | break; |
| 516 | vlan_dev_set_ingress_priority(dev, |
| 517 | args.u.skb_priority, |
| 518 | args.vlan_qos); |
Patrick McHardy | fffe470 | 2007-11-07 01:31:32 -0800 | [diff] [blame] | 519 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | break; |
| 521 | |
| 522 | case SET_VLAN_EGRESS_PRIORITY_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 523 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | if (!capable(CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 525 | break; |
| 526 | err = vlan_dev_set_egress_priority(dev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | args.u.skb_priority, |
| 528 | args.vlan_qos); |
| 529 | break; |
| 530 | |
| 531 | case SET_VLAN_FLAG_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 532 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | if (!capable(CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 534 | break; |
| 535 | err = vlan_dev_set_vlan_flag(dev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | args.u.flag, |
| 537 | args.vlan_qos); |
| 538 | break; |
| 539 | |
| 540 | case SET_VLAN_NAME_TYPE_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 541 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | if (!capable(CAP_NET_ADMIN)) |
Pavel Emelyanov | e35de02 | 2007-12-06 22:52:16 -0800 | [diff] [blame] | 543 | break; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 544 | if ((args.u.name_type >= 0) && |
| 545 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | vlan_name_type = args.u.name_type; |
| 547 | err = 0; |
| 548 | } else { |
| 549 | err = -EINVAL; |
| 550 | } |
| 551 | break; |
| 552 | |
| 553 | case ADD_VLAN_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 554 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | if (!capable(CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 556 | break; |
Patrick McHardy | 2ae0bf6 | 2007-06-13 12:06:43 -0700 | [diff] [blame] | 557 | err = register_vlan_device(dev, args.u.VID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | break; |
| 559 | |
| 560 | case DEL_VLAN_CMD: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 561 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | if (!capable(CAP_NET_ADMIN)) |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 563 | break; |
Patrick McHardy | af30151 | 2008-01-21 00:25:50 -0800 | [diff] [blame^] | 564 | unregister_vlan_dev(dev); |
| 565 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | break; |
| 567 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | case GET_VLAN_REALDEV_NAME_CMD: |
Andrew Morton | 3f5f434 | 2007-07-24 15:37:11 -0700 | [diff] [blame] | 569 | err = 0; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 570 | vlan_dev_get_realdev_name(dev, args.u.device2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | if (copy_to_user(arg, &args, |
| 572 | sizeof(struct vlan_ioctl_args))) { |
| 573 | err = -EFAULT; |
| 574 | } |
| 575 | break; |
| 576 | |
| 577 | case GET_VLAN_VID_CMD: |
Andrew Morton | 3f5f434 | 2007-07-24 15:37:11 -0700 | [diff] [blame] | 578 | err = 0; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 579 | vlan_dev_get_vid(dev, &vid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | args.u.VID = vid; |
| 581 | if (copy_to_user(arg, &args, |
| 582 | sizeof(struct vlan_ioctl_args))) { |
YOSHIFUJI Hideaki | 122952f | 2007-02-09 23:24:25 +0900 | [diff] [blame] | 583 | err = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | } |
| 585 | break; |
| 586 | |
| 587 | default: |
Patrick McHardy | 198a291 | 2008-01-21 00:24:59 -0800 | [diff] [blame] | 588 | err = -EOPNOTSUPP; |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 589 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 590 | } |
Mika Kukkonen | 7eb1b3d | 2005-12-21 18:39:49 -0800 | [diff] [blame] | 591 | out: |
Patrick McHardy | c17d887 | 2007-06-13 12:05:22 -0700 | [diff] [blame] | 592 | rtnl_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | return err; |
| 594 | } |
| 595 | |
Patrick McHardy | 69ab4b7 | 2008-01-21 00:25:15 -0800 | [diff] [blame] | 596 | static int __init vlan_proto_init(void) |
| 597 | { |
| 598 | int err; |
| 599 | |
| 600 | pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); |
| 601 | pr_info("All bugs added by %s\n", vlan_buggyright); |
| 602 | |
| 603 | err = vlan_proc_init(); |
| 604 | if (err < 0) |
| 605 | goto err1; |
| 606 | |
| 607 | err = register_netdevice_notifier(&vlan_notifier_block); |
| 608 | if (err < 0) |
| 609 | goto err2; |
| 610 | |
| 611 | err = vlan_netlink_init(); |
| 612 | if (err < 0) |
| 613 | goto err3; |
| 614 | |
| 615 | dev_add_pack(&vlan_packet_type); |
| 616 | vlan_ioctl_set(vlan_ioctl_handler); |
| 617 | return 0; |
| 618 | |
| 619 | err3: |
| 620 | unregister_netdevice_notifier(&vlan_notifier_block); |
| 621 | err2: |
| 622 | vlan_proc_cleanup(); |
| 623 | err1: |
| 624 | return err; |
| 625 | } |
| 626 | |
| 627 | static void __exit vlan_cleanup_module(void) |
| 628 | { |
| 629 | unsigned int i; |
| 630 | |
| 631 | vlan_ioctl_set(NULL); |
| 632 | vlan_netlink_fini(); |
| 633 | |
| 634 | unregister_netdevice_notifier(&vlan_notifier_block); |
| 635 | |
| 636 | dev_remove_pack(&vlan_packet_type); |
| 637 | |
| 638 | /* This table must be empty if there are no module references left. */ |
| 639 | for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) |
| 640 | BUG_ON(!hlist_empty(&vlan_group_hash[i])); |
| 641 | |
| 642 | vlan_proc_cleanup(); |
| 643 | |
| 644 | synchronize_net(); |
| 645 | } |
| 646 | |
| 647 | module_init(vlan_proto_init); |
| 648 | module_exit(vlan_cleanup_module); |
| 649 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | MODULE_LICENSE("GPL"); |
| 651 | MODULE_VERSION(DRV_VERSION); |