mirror of https://gitee.com/openkylin/linux.git
738 lines
18 KiB
C
738 lines
18 KiB
C
/*
|
|
* INET 802.1Q VLAN
|
|
* Ethernet-type device handling.
|
|
*
|
|
* Authors: Ben Greear <greearb@candelatech.com>
|
|
* Please send support related email to: netdev@vger.kernel.org
|
|
* VLAN Home Page: http://www.candelatech.com/~greear/vlan.html
|
|
*
|
|
* Fixes:
|
|
* Fix for packet capture - Nick Eggleston <nick@dccinc.com>;
|
|
* Add HW acceleration hooks - David S. Miller <davem@redhat.com>;
|
|
* Correct all the locking - David S. Miller <davem@redhat.com>;
|
|
* Use hash table for VLAN groups - David S. Miller <davem@redhat.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/capability.h>
|
|
#include <linux/module.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/init.h>
|
|
#include <linux/rculist.h>
|
|
#include <net/p8022.h>
|
|
#include <net/arp.h>
|
|
#include <linux/rtnetlink.h>
|
|
#include <linux/notifier.h>
|
|
#include <net/rtnetlink.h>
|
|
#include <net/net_namespace.h>
|
|
#include <net/netns/generic.h>
|
|
#include <linux/uaccess.h>
|
|
|
|
#include <linux/if_vlan.h>
|
|
#include "vlan.h"
|
|
#include "vlanproc.h"
|
|
|
|
#define DRV_VERSION "1.8"
|
|
|
|
/* Global VLAN variables */
|
|
|
|
unsigned int vlan_net_id __read_mostly;
|
|
|
|
const char vlan_fullname[] = "802.1Q VLAN Support";
|
|
const char vlan_version[] = DRV_VERSION;
|
|
|
|
/* End of global variables definitions. */
|
|
|
|
static int vlan_group_prealloc_vid(struct vlan_group *vg,
|
|
__be16 vlan_proto, u16 vlan_id)
|
|
{
|
|
struct net_device **array;
|
|
unsigned int pidx, vidx;
|
|
unsigned int size;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
pidx = vlan_proto_idx(vlan_proto);
|
|
vidx = vlan_id / VLAN_GROUP_ARRAY_PART_LEN;
|
|
array = vg->vlan_devices_arrays[pidx][vidx];
|
|
if (array != NULL)
|
|
return 0;
|
|
|
|
size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN;
|
|
array = kzalloc(size, GFP_KERNEL);
|
|
if (array == NULL)
|
|
return -ENOBUFS;
|
|
|
|
vg->vlan_devices_arrays[pidx][vidx] = array;
|
|
return 0;
|
|
}
|
|
|
|
void unregister_vlan_dev(struct net_device *dev, struct list_head *head)
|
|
{
|
|
struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
|
|
struct net_device *real_dev = vlan->real_dev;
|
|
struct vlan_info *vlan_info;
|
|
struct vlan_group *grp;
|
|
u16 vlan_id = vlan->vlan_id;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
vlan_info = rtnl_dereference(real_dev->vlan_info);
|
|
BUG_ON(!vlan_info);
|
|
|
|
grp = &vlan_info->grp;
|
|
|
|
grp->nr_vlan_devs--;
|
|
|
|
if (vlan->flags & VLAN_FLAG_MVRP)
|
|
vlan_mvrp_request_leave(dev);
|
|
if (vlan->flags & VLAN_FLAG_GVRP)
|
|
vlan_gvrp_request_leave(dev);
|
|
|
|
vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL);
|
|
|
|
netdev_upper_dev_unlink(real_dev, dev);
|
|
/* Because unregister_netdevice_queue() makes sure at least one rcu
|
|
* grace period is respected before device freeing,
|
|
* we dont need to call synchronize_net() here.
|
|
*/
|
|
unregister_netdevice_queue(dev, head);
|
|
|
|
if (grp->nr_vlan_devs == 0) {
|
|
vlan_mvrp_uninit_applicant(real_dev);
|
|
vlan_gvrp_uninit_applicant(real_dev);
|
|
}
|
|
|
|
vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id);
|
|
|
|
/* Get rid of the vlan's reference to real_dev */
|
|
dev_put(real_dev);
|
|
}
|
|
|
|
int vlan_check_real_dev(struct net_device *real_dev,
|
|
__be16 protocol, u16 vlan_id,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
const char *name = real_dev->name;
|
|
|
|
if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
|
|
pr_info("VLANs not supported on %s\n", name);
|
|
NL_SET_ERR_MSG_MOD(extack, "VLANs not supported on device");
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL) {
|
|
NL_SET_ERR_MSG_MOD(extack, "VLAN device already exists");
|
|
return -EEXIST;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack)
|
|
{
|
|
struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
|
|
struct net_device *real_dev = vlan->real_dev;
|
|
u16 vlan_id = vlan->vlan_id;
|
|
struct vlan_info *vlan_info;
|
|
struct vlan_group *grp;
|
|
int err;
|
|
|
|
err = vlan_vid_add(real_dev, vlan->vlan_proto, vlan_id);
|
|
if (err)
|
|
return err;
|
|
|
|
vlan_info = rtnl_dereference(real_dev->vlan_info);
|
|
/* vlan_info should be there now. vlan_vid_add took care of it */
|
|
BUG_ON(!vlan_info);
|
|
|
|
grp = &vlan_info->grp;
|
|
if (grp->nr_vlan_devs == 0) {
|
|
err = vlan_gvrp_init_applicant(real_dev);
|
|
if (err < 0)
|
|
goto out_vid_del;
|
|
err = vlan_mvrp_init_applicant(real_dev);
|
|
if (err < 0)
|
|
goto out_uninit_gvrp;
|
|
}
|
|
|
|
err = vlan_group_prealloc_vid(grp, vlan->vlan_proto, vlan_id);
|
|
if (err < 0)
|
|
goto out_uninit_mvrp;
|
|
|
|
vlan->nest_level = dev_get_nest_level(real_dev) + 1;
|
|
err = register_netdevice(dev);
|
|
if (err < 0)
|
|
goto out_uninit_mvrp;
|
|
|
|
err = netdev_upper_dev_link(real_dev, dev, extack);
|
|
if (err)
|
|
goto out_unregister_netdev;
|
|
|
|
/* Account for reference in struct vlan_dev_priv */
|
|
dev_hold(real_dev);
|
|
|
|
netif_stacked_transfer_operstate(real_dev, dev);
|
|
linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
|
|
|
|
/* So, got the sucker initialized, now lets place
|
|
* it into our local structure.
|
|
*/
|
|
vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev);
|
|
grp->nr_vlan_devs++;
|
|
|
|
return 0;
|
|
|
|
out_unregister_netdev:
|
|
unregister_netdevice(dev);
|
|
out_uninit_mvrp:
|
|
if (grp->nr_vlan_devs == 0)
|
|
vlan_mvrp_uninit_applicant(real_dev);
|
|
out_uninit_gvrp:
|
|
if (grp->nr_vlan_devs == 0)
|
|
vlan_gvrp_uninit_applicant(real_dev);
|
|
out_vid_del:
|
|
vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id);
|
|
return err;
|
|
}
|
|
|
|
/* Attach a VLAN device to a mac address (ie Ethernet Card).
|
|
* Returns 0 if the device was created or a negative error code otherwise.
|
|
*/
|
|
static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
|
|
{
|
|
struct net_device *new_dev;
|
|
struct vlan_dev_priv *vlan;
|
|
struct net *net = dev_net(real_dev);
|
|
struct vlan_net *vn = net_generic(net, vlan_net_id);
|
|
char name[IFNAMSIZ];
|
|
int err;
|
|
|
|
if (vlan_id >= VLAN_VID_MASK)
|
|
return -ERANGE;
|
|
|
|
err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id,
|
|
NULL);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
/* Gotta set up the fields for the device. */
|
|
switch (vn->name_type) {
|
|
case VLAN_NAME_TYPE_RAW_PLUS_VID:
|
|
/* name will look like: eth1.0005 */
|
|
snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
|
|
break;
|
|
case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
|
|
/* Put our vlan.VID in the name.
|
|
* Name will look like: vlan5
|
|
*/
|
|
snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
|
|
break;
|
|
case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
|
|
/* Put our vlan.VID in the name.
|
|
* Name will look like: eth0.5
|
|
*/
|
|
snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
|
|
break;
|
|
case VLAN_NAME_TYPE_PLUS_VID:
|
|
/* Put our vlan.VID in the name.
|
|
* Name will look like: vlan0005
|
|
*/
|
|
default:
|
|
snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
|
|
}
|
|
|
|
new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name,
|
|
NET_NAME_UNKNOWN, vlan_setup);
|
|
|
|
if (new_dev == NULL)
|
|
return -ENOBUFS;
|
|
|
|
dev_net_set(new_dev, net);
|
|
/* need 4 bytes for extra VLAN header info,
|
|
* hope the underlying device can handle it.
|
|
*/
|
|
new_dev->mtu = real_dev->mtu;
|
|
|
|
vlan = vlan_dev_priv(new_dev);
|
|
vlan->vlan_proto = htons(ETH_P_8021Q);
|
|
vlan->vlan_id = vlan_id;
|
|
vlan->real_dev = real_dev;
|
|
vlan->dent = NULL;
|
|
vlan->flags = VLAN_FLAG_REORDER_HDR;
|
|
|
|
new_dev->rtnl_link_ops = &vlan_link_ops;
|
|
err = register_vlan_dev(new_dev, NULL);
|
|
if (err < 0)
|
|
goto out_free_newdev;
|
|
|
|
return 0;
|
|
|
|
out_free_newdev:
|
|
if (new_dev->reg_state == NETREG_UNINITIALIZED)
|
|
free_netdev(new_dev);
|
|
return err;
|
|
}
|
|
|
|
static void vlan_sync_address(struct net_device *dev,
|
|
struct net_device *vlandev)
|
|
{
|
|
struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
|
|
|
|
/* May be called without an actual change */
|
|
if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr))
|
|
return;
|
|
|
|
/* vlan continues to inherit address of lower device */
|
|
if (vlan_dev_inherit_address(vlandev, dev))
|
|
goto out;
|
|
|
|
/* vlan address was different from the old address and is equal to
|
|
* the new address */
|
|
if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
|
|
ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
|
|
dev_uc_del(dev, vlandev->dev_addr);
|
|
|
|
/* vlan address was equal to the old address and is different from
|
|
* the new address */
|
|
if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
|
|
!ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
|
|
dev_uc_add(dev, vlandev->dev_addr);
|
|
|
|
out:
|
|
ether_addr_copy(vlan->real_dev_addr, dev->dev_addr);
|
|
}
|
|
|
|
static void vlan_transfer_features(struct net_device *dev,
|
|
struct net_device *vlandev)
|
|
{
|
|
struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
|
|
|
|
vlandev->gso_max_size = dev->gso_max_size;
|
|
vlandev->gso_max_segs = dev->gso_max_segs;
|
|
|
|
if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto))
|
|
vlandev->hard_header_len = dev->hard_header_len;
|
|
else
|
|
vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
|
|
|
|
#if IS_ENABLED(CONFIG_FCOE)
|
|
vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
|
|
#endif
|
|
|
|
vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
|
|
vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE);
|
|
vlandev->hw_enc_features = vlan_tnl_features(vlan->real_dev);
|
|
|
|
netdev_update_features(vlandev);
|
|
}
|
|
|
|
static int __vlan_device_event(struct net_device *dev, unsigned long event)
|
|
{
|
|
int err = 0;
|
|
|
|
switch (event) {
|
|
case NETDEV_CHANGENAME:
|
|
vlan_proc_rem_dev(dev);
|
|
err = vlan_proc_add_dev(dev);
|
|
break;
|
|
case NETDEV_REGISTER:
|
|
err = vlan_proc_add_dev(dev);
|
|
break;
|
|
case NETDEV_UNREGISTER:
|
|
vlan_proc_rem_dev(dev);
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int vlan_device_event(struct notifier_block *unused, unsigned long event,
|
|
void *ptr)
|
|
{
|
|
struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
|
|
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
|
|
struct vlan_group *grp;
|
|
struct vlan_info *vlan_info;
|
|
int i, flgs;
|
|
struct net_device *vlandev;
|
|
struct vlan_dev_priv *vlan;
|
|
bool last = false;
|
|
LIST_HEAD(list);
|
|
int err;
|
|
|
|
if (is_vlan_dev(dev)) {
|
|
int err = __vlan_device_event(dev, event);
|
|
|
|
if (err)
|
|
return notifier_from_errno(err);
|
|
}
|
|
|
|
if ((event == NETDEV_UP) &&
|
|
(dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) {
|
|
pr_info("adding VLAN 0 to HW filter on device %s\n",
|
|
dev->name);
|
|
vlan_vid_add(dev, htons(ETH_P_8021Q), 0);
|
|
}
|
|
if (event == NETDEV_DOWN &&
|
|
(dev->features & NETIF_F_HW_VLAN_CTAG_FILTER))
|
|
vlan_vid_del(dev, htons(ETH_P_8021Q), 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 */
|
|
vlan_group_for_each_dev(grp, i, vlandev)
|
|
netif_stacked_transfer_operstate(dev, vlandev);
|
|
break;
|
|
|
|
case NETDEV_CHANGEADDR:
|
|
/* Adjust unicast filters on underlying device */
|
|
vlan_group_for_each_dev(grp, i, vlandev) {
|
|
flgs = vlandev->flags;
|
|
if (!(flgs & IFF_UP))
|
|
continue;
|
|
|
|
vlan_sync_address(dev, vlandev);
|
|
}
|
|
break;
|
|
|
|
case NETDEV_CHANGEMTU:
|
|
vlan_group_for_each_dev(grp, i, vlandev) {
|
|
if (vlandev->mtu <= dev->mtu)
|
|
continue;
|
|
|
|
dev_set_mtu(vlandev, dev->mtu);
|
|
}
|
|
break;
|
|
|
|
case NETDEV_FEAT_CHANGE:
|
|
/* Propagate device features to underlying device */
|
|
vlan_group_for_each_dev(grp, i, vlandev)
|
|
vlan_transfer_features(dev, vlandev);
|
|
break;
|
|
|
|
case NETDEV_DOWN: {
|
|
struct net_device *tmp;
|
|
LIST_HEAD(close_list);
|
|
|
|
/* Put all VLANs for this dev in the down state too. */
|
|
vlan_group_for_each_dev(grp, i, vlandev) {
|
|
flgs = vlandev->flags;
|
|
if (!(flgs & IFF_UP))
|
|
continue;
|
|
|
|
vlan = vlan_dev_priv(vlandev);
|
|
if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
|
|
list_add(&vlandev->close_list, &close_list);
|
|
}
|
|
|
|
dev_close_many(&close_list, false);
|
|
|
|
list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) {
|
|
netif_stacked_transfer_operstate(dev, vlandev);
|
|
list_del_init(&vlandev->close_list);
|
|
}
|
|
list_del(&close_list);
|
|
break;
|
|
}
|
|
case NETDEV_UP:
|
|
/* Put all VLANs for this dev in the up state too. */
|
|
vlan_group_for_each_dev(grp, i, vlandev) {
|
|
flgs = dev_get_flags(vlandev);
|
|
if (flgs & IFF_UP)
|
|
continue;
|
|
|
|
vlan = vlan_dev_priv(vlandev);
|
|
if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
|
|
dev_change_flags(vlandev, flgs | IFF_UP,
|
|
extack);
|
|
netif_stacked_transfer_operstate(dev, vlandev);
|
|
}
|
|
break;
|
|
|
|
case NETDEV_UNREGISTER:
|
|
/* twiddle thumbs on netns device moves */
|
|
if (dev->reg_state != NETREG_UNREGISTERING)
|
|
break;
|
|
|
|
vlan_group_for_each_dev(grp, i, vlandev) {
|
|
/* removal of last vid destroys vlan_info, abort
|
|
* afterwards */
|
|
if (vlan_info->nr_vids == 1)
|
|
last = true;
|
|
|
|
unregister_vlan_dev(vlandev, &list);
|
|
if (last)
|
|
break;
|
|
}
|
|
unregister_netdevice_many(&list);
|
|
break;
|
|
|
|
case NETDEV_PRE_TYPE_CHANGE:
|
|
/* Forbid underlaying device to change its type. */
|
|
if (vlan_uses_dev(dev))
|
|
return NOTIFY_BAD;
|
|
break;
|
|
|
|
case NETDEV_NOTIFY_PEERS:
|
|
case NETDEV_BONDING_FAILOVER:
|
|
case NETDEV_RESEND_IGMP:
|
|
/* Propagate to vlan devices */
|
|
vlan_group_for_each_dev(grp, i, vlandev)
|
|
call_netdevice_notifiers(event, vlandev);
|
|
break;
|
|
|
|
case NETDEV_CVLAN_FILTER_PUSH_INFO:
|
|
err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021Q));
|
|
if (err)
|
|
return notifier_from_errno(err);
|
|
break;
|
|
|
|
case NETDEV_CVLAN_FILTER_DROP_INFO:
|
|
vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021Q));
|
|
break;
|
|
|
|
case NETDEV_SVLAN_FILTER_PUSH_INFO:
|
|
err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021AD));
|
|
if (err)
|
|
return notifier_from_errno(err);
|
|
break;
|
|
|
|
case NETDEV_SVLAN_FILTER_DROP_INFO:
|
|
vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021AD));
|
|
break;
|
|
}
|
|
|
|
out:
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block vlan_notifier_block __read_mostly = {
|
|
.notifier_call = vlan_device_event,
|
|
};
|
|
|
|
/*
|
|
* 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[sizeof(args.device1) - 1] = 0;
|
|
args.u.device2[sizeof(args.u.device2) - 1] = 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 (!ns_capable(net->user_ns, 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 (!ns_capable(net->user_ns, 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 (!ns_capable(net->user_ns, 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 (!ns_capable(net->user_ns, CAP_NET_ADMIN))
|
|
break;
|
|
if (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 (!ns_capable(net->user_ns, CAP_NET_ADMIN))
|
|
break;
|
|
err = register_vlan_device(dev, args.u.VID);
|
|
break;
|
|
|
|
case DEL_VLAN_CMD:
|
|
err = -EPERM;
|
|
if (!ns_capable(net->user_ns, 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 __net_init vlan_init_net(struct net *net)
|
|
{
|
|
struct vlan_net *vn = net_generic(net, vlan_net_id);
|
|
int err;
|
|
|
|
vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
|
|
|
|
err = vlan_proc_init(net);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void __net_exit vlan_exit_net(struct net *net)
|
|
{
|
|
vlan_proc_cleanup(net);
|
|
}
|
|
|
|
static struct pernet_operations vlan_net_ops = {
|
|
.init = vlan_init_net,
|
|
.exit = vlan_exit_net,
|
|
.id = &vlan_net_id,
|
|
.size = sizeof(struct vlan_net),
|
|
};
|
|
|
|
static int __init vlan_proto_init(void)
|
|
{
|
|
int err;
|
|
|
|
pr_info("%s v%s\n", vlan_fullname, vlan_version);
|
|
|
|
err = register_pernet_subsys(&vlan_net_ops);
|
|
if (err < 0)
|
|
goto err0;
|
|
|
|
err = register_netdevice_notifier(&vlan_notifier_block);
|
|
if (err < 0)
|
|
goto err2;
|
|
|
|
err = vlan_gvrp_init();
|
|
if (err < 0)
|
|
goto err3;
|
|
|
|
err = vlan_mvrp_init();
|
|
if (err < 0)
|
|
goto err4;
|
|
|
|
err = vlan_netlink_init();
|
|
if (err < 0)
|
|
goto err5;
|
|
|
|
vlan_ioctl_set(vlan_ioctl_handler);
|
|
return 0;
|
|
|
|
err5:
|
|
vlan_mvrp_uninit();
|
|
err4:
|
|
vlan_gvrp_uninit();
|
|
err3:
|
|
unregister_netdevice_notifier(&vlan_notifier_block);
|
|
err2:
|
|
unregister_pernet_subsys(&vlan_net_ops);
|
|
err0:
|
|
return err;
|
|
}
|
|
|
|
static void __exit vlan_cleanup_module(void)
|
|
{
|
|
vlan_ioctl_set(NULL);
|
|
|
|
vlan_netlink_fini();
|
|
|
|
unregister_netdevice_notifier(&vlan_notifier_block);
|
|
|
|
unregister_pernet_subsys(&vlan_net_ops);
|
|
rcu_barrier(); /* Wait for completion of call_rcu()'s */
|
|
|
|
vlan_mvrp_uninit();
|
|
vlan_gvrp_uninit();
|
|
}
|
|
|
|
module_init(vlan_proto_init);
|
|
module_exit(vlan_cleanup_module);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(DRV_VERSION);
|