/* Cleanup all vlan devices
* Note: devices that have been registered that but not
* brought up will exist but have no module ref count.
*/
static void __exit vlan_cleanup_devices(void)
{
struct net_device *dev, *nxt;
rtnl_lock();
for (dev = dev_base; dev; dev = nxt) {
nxt = dev->next;
if (dev->priv_flags & IFF_802_1Q_VLAN) {
unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev,
VLAN_DEV_INFO(dev)->vlan_id);
unregister_netdevice(dev);
}
}
rtnl_unlock();
}
static int unregister_vlan_device(const char *vlan_IF_name)
{
struct net_device *dev = NULL;
int ret;
dev = dev_get_by_name(vlan_IF_name);
ret = -EINVAL;
if (dev) {
if (dev->priv_flags & IFF_802_1Q_VLAN) {
rtnl_lock();
ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev,
VLAN_DEV_INFO(dev)->vlan_id);
dev_put(dev);
unregister_netdevice(dev);
rtnl_unlock();
if (ret == 1)
ret = 0;
} else {
printk(VLAN_ERR
"%s: ERROR: Tried to remove a non-vlan device "
"with VLAN code, name: %s priv_flags: %hX\n",
__FUNCTION__, dev->name, dev->priv_flags);
dev_put(dev);
ret = -EPERM;
}
} else {
#ifdef VLAN_DEBUG
printk(VLAN_DBG "%s: WARNING: Could not find dev.\n", __FUNCTION__);
#endif
ret = -EINVAL;
}
return ret;
}
/*
* VLAN IOCTL handler.
* o execute requested action or pass command to the device driver
* arg is really a struct vlan_ioctl_args __user *.
*/
static int vlan_ioctl_handler(struct net *net, void __user *arg)
{
int err;
struct vlan_ioctl_args args;
struct net_device *dev = NULL;
if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
return -EFAULT;
/* Null terminate this sucker, just in case. */
args.device1[23] = 0;
args.u.device2[23] = 0;
rtnl_lock();
switch (args.cmd) {
case SET_VLAN_INGRESS_PRIORITY_CMD:
case SET_VLAN_EGRESS_PRIORITY_CMD:
case SET_VLAN_FLAG_CMD:
case ADD_VLAN_CMD:
case DEL_VLAN_CMD:
case GET_VLAN_REALDEV_NAME_CMD:
case GET_VLAN_VID_CMD:
err = -ENODEV;
dev = __dev_get_by_name(net, args.device1);
if (!dev)
goto out;
err = -EINVAL;
if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
goto out;
}
switch (args.cmd) {
case SET_VLAN_INGRESS_PRIORITY_CMD:
err = -EPERM;
if (!capable(CAP_NET_ADMIN))
break;
vlan_dev_set_ingress_priority(dev,
args.u.skb_priority,
args.vlan_qos);
err = 0;
break;
case SET_VLAN_EGRESS_PRIORITY_CMD:
err = -EPERM;
if (!capable(CAP_NET_ADMIN))
break;
err = vlan_dev_set_egress_priority(dev,
args.u.skb_priority,
args.vlan_qos);
break;
case SET_VLAN_FLAG_CMD:
err = -EPERM;
if (!capable(CAP_NET_ADMIN))
break;
err = vlan_dev_change_flags(dev,
args.vlan_qos ? args.u.flag : 0,
args.u.flag);
break;
case SET_VLAN_NAME_TYPE_CMD:
err = -EPERM;
if (!capable(CAP_NET_ADMIN))
break;
if ((args.u.name_type >= 0) &&
(args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
struct vlan_net *vn;
vn = net_generic(net, vlan_net_id);
vn->name_type = args.u.name_type;
err = 0;
} else {
err = -EINVAL;
}
break;
case ADD_VLAN_CMD:
err = -EPERM;
if (!capable(CAP_NET_ADMIN))
break;
err = register_vlan_device(dev, args.u.VID);
break;
case DEL_VLAN_CMD:
err = -EPERM;
if (!capable(CAP_NET_ADMIN))
break;
unregister_vlan_dev(dev, NULL);
err = 0;
break;
case GET_VLAN_REALDEV_NAME_CMD:
err = 0;
vlan_dev_get_realdev_name(dev, args.u.device2);
if (copy_to_user(arg, &args,
sizeof(struct vlan_ioctl_args)))
err = -EFAULT;
break;
case GET_VLAN_VID_CMD:
err = 0;
args.u.VID = vlan_dev_vlan_id(dev);
if (copy_to_user(arg, &args,
sizeof(struct vlan_ioctl_args)))
err = -EFAULT;
break;
default:
err = -EOPNOTSUPP;
break;
}
out:
rtnl_unlock();
return err;
}
static int vlan_device_event(struct notifier_block *unused, unsigned long event,
void *ptr)
{
struct net_device *dev = ptr;
struct vlan_group *grp;
struct vlan_info *vlan_info;
int i, flgs;
struct net_device *vlandev;
struct vlan_dev_priv *vlan;
LIST_HEAD(list);
if (is_vlan_dev(dev))
__vlan_device_event(dev, event);
if ((event == NETDEV_UP) &&
(dev->features & NETIF_F_HW_VLAN_FILTER)) {
pr_info("adding VLAN 0 to HW filter on device %s\n",
dev->name);
vlan_vid_add(dev, 0);
}
vlan_info = rtnl_dereference(dev->vlan_info);
if (!vlan_info)
goto out;
grp = &vlan_info->grp;
/* It is OK that we do not hold the group lock right now,
* as we run under the RTNL lock.
*/
switch (event) {
case NETDEV_CHANGE:
/* Propagate real device state to vlan devices */
for (i = 0; i < VLAN_N_VID; i++) {
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
netif_stacked_transfer_operstate(dev, vlandev);
}
break;
case NETDEV_CHANGEADDR:
/* Adjust unicast filters on underlying device */
for (i = 0; i < VLAN_N_VID; i++) {
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
flgs = vlandev->flags;
if (!(flgs & IFF_UP))
continue;
vlan_sync_address(dev, vlandev);
}
break;
case NETDEV_CHANGEMTU:
for (i = 0; i < VLAN_N_VID; i++) {
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
if (vlandev->mtu <= dev->mtu)
continue;
dev_set_mtu(vlandev, dev->mtu);
}
break;
case NETDEV_FEAT_CHANGE:
/* Propagate device features to underlying device */
for (i = 0; i < VLAN_N_VID; i++) {
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
vlan_transfer_features(dev, vlandev);
}
break;
case NETDEV_DOWN:
if (dev->features & NETIF_F_HW_VLAN_FILTER)
vlan_vid_del(dev, 0);
/* Put all VLANs for this dev in the down state too. */
for (i = 0; i < VLAN_N_VID; i++) {
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
flgs = vlandev->flags;
if (!(flgs & IFF_UP))
continue;
vlan = vlan_dev_priv(vlandev);
if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
dev_change_flags(vlandev, flgs & ~IFF_UP);
netif_stacked_transfer_operstate(dev, vlandev);
}
break;
case NETDEV_UP:
/* Put all VLANs for this dev in the up state too. */
for (i = 0; i < VLAN_N_VID; i++) {
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
flgs = vlandev->flags;
if (flgs & IFF_UP)
continue;
vlan = vlan_dev_priv(vlandev);
if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
dev_change_flags(vlandev, flgs | IFF_UP);
netif_stacked_transfer_operstate(dev, vlandev);
}
break;
case NETDEV_UNREGISTER:
/* twiddle thumbs on netns device moves */
if (dev->reg_state != NETREG_UNREGISTERING)
break;
for (i = 0; i < VLAN_N_VID; i++) {
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
/* removal of last vid destroys vlan_info, abort
* afterwards */
if (vlan_info->nr_vids == 1)
i = VLAN_N_VID;
unregister_vlan_dev(vlandev, &list);
}
unregister_netdevice_many(&list);
break;
case NETDEV_PRE_TYPE_CHANGE:
/* Forbid underlaying device to change its type. */
return NOTIFY_BAD;
case NETDEV_NOTIFY_PEERS:
case NETDEV_BONDING_FAILOVER:
/* Propagate to vlan devices */
for (i = 0; i < VLAN_N_VID; i++) {
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
call_netdevice_notifiers(event, vlandev);
}
break;
}
out:
return NOTIFY_DONE;
}
static int vlan_device_event(struct notifier_block *unused, unsigned long event,
void *ptr)
{
struct net_device *dev = ptr;
struct vlan_group *grp;
struct vlan_info *vlan_info;
int i, flgs;
struct net_device *vlandev;
struct vlan_dev_priv *vlan;
LIST_HEAD(list);
if (is_vlan_dev(dev))
__vlan_device_event(dev, event);
if ((event == NETDEV_UP) &&
(dev->features & NETIF_F_HW_VLAN_FILTER)) {
pr_info("adding VLAN 0 to HW filter on device %s\n",
dev->name);
vlan_vid_add(dev, 0);
}
vlan_info = rtnl_dereference(dev->vlan_info);
if (!vlan_info)
goto out;
grp = &vlan_info->grp;
switch (event) {
case NETDEV_CHANGE:
for (i = 0; i < VLAN_N_VID; i++) {
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
netif_stacked_transfer_operstate(dev, vlandev);
}
break;
case NETDEV_CHANGEADDR:
for (i = 0; i < VLAN_N_VID; i++) {
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
flgs = vlandev->flags;
if (!(flgs & IFF_UP))
continue;
vlan_sync_address(dev, vlandev);
}
break;
case NETDEV_CHANGEMTU:
for (i = 0; i < VLAN_N_VID; i++) {
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
if (vlandev->mtu <= dev->mtu)
continue;
dev_set_mtu(vlandev, dev->mtu);
}
break;
case NETDEV_FEAT_CHANGE:
for (i = 0; i < VLAN_N_VID; i++) {
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
vlan_transfer_features(dev, vlandev);
}
break;
case NETDEV_DOWN:
for (i = 0; i < VLAN_N_VID; i++) {
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
flgs = vlandev->flags;
if (!(flgs & IFF_UP))
continue;
vlan = vlan_dev_priv(vlandev);
if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
dev_change_flags(vlandev, flgs & ~IFF_UP);
netif_stacked_transfer_operstate(dev, vlandev);
}
break;
case NETDEV_UP:
for (i = 0; i < VLAN_N_VID; i++) {
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
flgs = vlandev->flags;
if (flgs & IFF_UP)
continue;
vlan = vlan_dev_priv(vlandev);
if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
dev_change_flags(vlandev, flgs | IFF_UP);
netif_stacked_transfer_operstate(dev, vlandev);
}
break;
case NETDEV_UNREGISTER:
if (dev->reg_state != NETREG_UNREGISTERING)
break;
for (i = 0; i < VLAN_N_VID; i++) {
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
if (vlan_info->nr_vids == 1)
i = VLAN_N_VID;
unregister_vlan_dev(vlandev, &list);
}
unregister_netdevice_many(&list);
break;
case NETDEV_PRE_TYPE_CHANGE:
return NOTIFY_BAD;
case NETDEV_NOTIFY_PEERS:
case NETDEV_BONDING_FAILOVER:
for (i = 0; i < VLAN_N_VID; i++) {
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
call_netdevice_notifiers(event, vlandev);
}
break;
}
out:
return NOTIFY_DONE;
}
static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
{
struct net_device *dev = (struct net_device *)(ptr);
struct vlan_group *grp = NULL;
int i, flgs;
struct net_device *vlandev = NULL;
spin_lock_bh(&vlan_group_lock);
grp = __vlan_find_group(dev->ifindex);
spin_unlock_bh(&vlan_group_lock);
if (!grp)
goto out;
/* It is OK that we do not hold the group lock right now,
* as we run under the RTNL lock.
*/
switch (event) {
case NETDEV_CHANGEADDR:
case NETDEV_GOING_DOWN:
/* Ignore for now */
break;
case NETDEV_DOWN:
/* Put all VLANs for this dev in the down state too. */
for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
vlandev = grp->vlan_devices[i];
if (!vlandev)
continue;
flgs = vlandev->flags;
if (!(flgs & IFF_UP))
continue;
dev_change_flags(vlandev, flgs & ~IFF_UP);
}
break;
case NETDEV_UP:
/* Put all VLANs for this dev in the up state too. */
for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
vlandev = grp->vlan_devices[i];
if (!vlandev)
continue;
flgs = vlandev->flags;
if (flgs & IFF_UP)
continue;
dev_change_flags(vlandev, flgs | IFF_UP);
}
break;
case NETDEV_UNREGISTER:
/* Delete all VLANs for this dev. */
for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
int ret;
vlandev = grp->vlan_devices[i];
if (!vlandev)
continue;
ret = unregister_vlan_dev(dev,
VLAN_DEV_INFO(vlandev)->vlan_id);
dev_put(vlandev);
unregister_netdevice(vlandev);
/* Group was destroyed? */
if (ret == 1)
break;
}
break;
};
out:
return NOTIFY_DONE;
}
static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
{
struct net_device *dev = ptr;
struct vlan_group *grp = vlan_find_group(dev->ifindex);
int i, flgs;
struct net_device *vlandev;
if (!grp)
goto out;
/* It is OK that we do not hold the group lock right now,
* as we run under the RTNL lock.
*/
switch (event) {
case NETDEV_CHANGE:
/* Propagate real device state to vlan devices */
for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
vlan_transfer_operstate(dev, vlandev);
}
break;
case NETDEV_DOWN:
/* Put all VLANs for this dev in the down state too. */
for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
flgs = vlandev->flags;
if (!(flgs & IFF_UP))
continue;
dev_change_flags(vlandev, flgs & ~IFF_UP);
}
break;
case NETDEV_UP:
/* Put all VLANs for this dev in the up state too. */
for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
flgs = vlandev->flags;
if (flgs & IFF_UP)
continue;
dev_change_flags(vlandev, flgs | IFF_UP);
}
break;
case NETDEV_UNREGISTER:
/* Delete all VLANs for this dev. */
for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
int ret;
vlandev = vlan_group_get_device(grp, i);
if (!vlandev)
continue;
flgs = vlandev->flags;
if (!(flgs & IFF_UP))
continue;
ret = unregister_vlan_dev(dev,
VLAN_DEV_INFO(vlandev)->vlan_id);
unregister_netdevice(vlandev);
/* Group was destroyed? */
if (ret == 1)
break;
}
break;
};
out:
return NOTIFY_DONE;
}
