* 2 of the License, or (at your option) any later version.
*/
-#include <asm/uaccess.h> /* for copy_from_user */
#include <linux/capability.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
-#include <net/datalink.h>
-#include <linux/mm.h>
-#include <linux/in.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 <asm/uaccess.h>
#include <linux/if_vlan.h>
#include "vlan.h"
/* Global VLAN variables */
+int vlan_net_id;
+
/* Our listing of VLAN group(s) */
static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE];
-static char vlan_fullname[] = "802.1Q VLAN Support";
-static char vlan_version[] = DRV_VERSION;
-static char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>";
-static char vlan_buggyright[] = "David S. Miller <davem@redhat.com>";
-
-/* Determines interface naming scheme. */
-unsigned short vlan_name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
+const char vlan_fullname[] = "802.1Q VLAN Support";
+const char vlan_version[] = DRV_VERSION;
+static const char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>";
+static const char vlan_buggyright[] = "David S. Miller <davem@redhat.com>";
-static struct packet_type vlan_packet_type = {
- .type = __constant_htons(ETH_P_8021Q),
+static struct packet_type vlan_packet_type __read_mostly = {
+ .type = cpu_to_be16(ETH_P_8021Q),
.func = vlan_skb_recv, /* VLAN receive method */
};
}
/* Must be invoked with RCU read lock (no preempt) */
-static struct vlan_group *__vlan_find_group(int real_dev_ifindex)
+static struct vlan_group *__vlan_find_group(struct net_device *real_dev)
{
struct vlan_group *grp;
struct hlist_node *n;
- int hash = vlan_grp_hashfn(real_dev_ifindex);
+ int hash = vlan_grp_hashfn(real_dev->ifindex);
hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) {
- if (grp->real_dev_ifindex == real_dev_ifindex)
+ if (grp->real_dev == real_dev)
return grp;
}
*
* Must be invoked with RCU read lock (no preempt)
*/
-struct net_device *__find_vlan_dev(struct net_device *real_dev,
- unsigned short VID)
+struct net_device *__find_vlan_dev(struct net_device *real_dev, u16 vlan_id)
{
- struct vlan_group *grp = __vlan_find_group(real_dev->ifindex);
+ struct vlan_group *grp = __vlan_find_group(real_dev);
if (grp)
- return vlan_group_get_device(grp, VID);
+ return vlan_group_get_device(grp, vlan_id);
return NULL;
}
kfree(grp);
}
-static struct vlan_group *vlan_group_alloc(int ifindex)
+static struct vlan_group *vlan_group_alloc(struct net_device *real_dev)
{
struct vlan_group *grp;
- unsigned int size;
- unsigned int i;
grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL);
if (!grp)
return NULL;
- size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN;
-
- for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) {
- grp->vlan_devices_arrays[i] = kzalloc(size, GFP_KERNEL);
- if (!grp->vlan_devices_arrays[i])
- goto err;
- }
-
- grp->real_dev_ifindex = ifindex;
+ grp->real_dev = real_dev;
hlist_add_head_rcu(&grp->hlist,
- &vlan_group_hash[vlan_grp_hashfn(ifindex)]);
+ &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]);
return grp;
+}
-err:
- vlan_group_free(grp);
- return NULL;
+static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id)
+{
+ struct net_device **array;
+ unsigned int size;
+
+ ASSERT_RTNL();
+
+ array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
+ 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[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array;
+ return 0;
}
static void vlan_rcu_free(struct rcu_head *rcu)
{
struct vlan_dev_info *vlan = vlan_dev_info(dev);
struct net_device *real_dev = vlan->real_dev;
+ const struct net_device_ops *ops = real_dev->netdev_ops;
struct vlan_group *grp;
- unsigned short vlan_id = vlan->vlan_id;
+ u16 vlan_id = vlan->vlan_id;
ASSERT_RTNL();
- grp = __vlan_find_group(real_dev->ifindex);
+ grp = __vlan_find_group(real_dev);
BUG_ON(!grp);
- vlan_proc_rem_dev(dev);
-
/* Take it out of our own structures, but be sure to interlock with
* HW accelerating devices or SW vlan input packet processing.
*/
if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
- real_dev->vlan_rx_kill_vid(real_dev, vlan_id);
+ ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id);
vlan_group_set_device(grp, vlan_id, NULL);
grp->nr_vlans--;
synchronize_net();
+ unregister_netdevice(dev);
+
/* If the group is now empty, kill off the group. */
if (grp->nr_vlans == 0) {
+ vlan_gvrp_uninit_applicant(real_dev);
+
if (real_dev->features & NETIF_F_HW_VLAN_RX)
- real_dev->vlan_rx_register(real_dev, NULL);
+ ops->ndo_vlan_rx_register(real_dev, NULL);
hlist_del_rcu(&grp->hlist);
/* Get rid of the vlan's reference to real_dev */
dev_put(real_dev);
-
- unregister_netdevice(dev);
}
static void vlan_transfer_operstate(const struct net_device *dev,
}
}
-int vlan_check_real_dev(struct net_device *real_dev, unsigned short vlan_id)
+int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id)
{
- char *name = real_dev->name;
+ const char *name = real_dev->name;
+ const struct net_device_ops *ops = real_dev->netdev_ops;
if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
pr_info("8021q: VLANs not supported on %s\n", name);
return -EOPNOTSUPP;
}
- if ((real_dev->features & NETIF_F_HW_VLAN_RX) &&
- !real_dev->vlan_rx_register) {
+ if ((real_dev->features & NETIF_F_HW_VLAN_RX) && !ops->ndo_vlan_rx_register) {
pr_info("8021q: device %s has buggy VLAN hw accel\n", name);
return -EOPNOTSUPP;
}
if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) &&
- (!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) {
+ (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) {
pr_info("8021q: Device %s has buggy VLAN hw accel\n", name);
return -EOPNOTSUPP;
}
{
struct vlan_dev_info *vlan = vlan_dev_info(dev);
struct net_device *real_dev = vlan->real_dev;
- unsigned short vlan_id = vlan->vlan_id;
+ const struct net_device_ops *ops = real_dev->netdev_ops;
+ u16 vlan_id = vlan->vlan_id;
struct vlan_group *grp, *ngrp = NULL;
int err;
- grp = __vlan_find_group(real_dev->ifindex);
+ grp = __vlan_find_group(real_dev);
if (!grp) {
- ngrp = grp = vlan_group_alloc(real_dev->ifindex);
+ ngrp = grp = vlan_group_alloc(real_dev);
if (!grp)
return -ENOBUFS;
+ err = vlan_gvrp_init_applicant(real_dev);
+ if (err < 0)
+ goto out_free_group;
}
+ err = vlan_group_prealloc_vid(grp, vlan_id);
+ if (err < 0)
+ goto out_uninit_applicant;
+
err = register_netdevice(dev);
if (err < 0)
- goto out_free_group;
+ goto out_uninit_applicant;
/* Account for reference in struct vlan_dev_info */
dev_hold(real_dev);
grp->nr_vlans++;
if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX)
- real_dev->vlan_rx_register(real_dev, ngrp);
+ ops->ndo_vlan_rx_register(real_dev, ngrp);
if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
- real_dev->vlan_rx_add_vid(real_dev, vlan_id);
+ ops->ndo_vlan_rx_add_vid(real_dev, vlan_id);
- if (vlan_proc_add_dev(dev) < 0)
- pr_warning("8021q: failed to add proc entry for %s\n",
- dev->name);
return 0;
+out_uninit_applicant:
+ if (ngrp)
+ vlan_gvrp_uninit_applicant(real_dev);
out_free_group:
if (ngrp)
vlan_group_free(ngrp);
/* 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,
- unsigned short VLAN_ID)
+static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
{
struct net_device *new_dev;
+ 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)
+ if (vlan_id >= VLAN_VID_MASK)
return -ERANGE;
- err = vlan_check_real_dev(real_dev, VLAN_ID);
+ err = vlan_check_real_dev(real_dev, vlan_id);
if (err < 0)
return err;
/* Gotta set up the fields for the device. */
- switch (vlan_name_type) {
+ 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);
+ 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);
+ 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);
+ 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);
+ snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
}
new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name,
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_dev_info(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */
+ vlan_dev_info(new_dev)->vlan_id = vlan_id;
vlan_dev_info(new_dev)->real_dev = real_dev;
vlan_dev_info(new_dev)->dent = NULL;
vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR;
memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN);
}
+static void vlan_transfer_features(struct net_device *dev,
+ struct net_device *vlandev)
+{
+ unsigned long old_features = vlandev->features;
+
+ vlandev->features &= ~dev->vlan_features;
+ vlandev->features |= dev->features & dev->vlan_features;
+ vlandev->gso_max_size = dev->gso_max_size;
+
+ if (old_features != vlandev->features)
+ netdev_features_change(vlandev);
+}
+
+static void __vlan_device_event(struct net_device *dev, unsigned long event)
+{
+ switch (event) {
+ case NETDEV_CHANGENAME:
+ vlan_proc_rem_dev(dev);
+ if (vlan_proc_add_dev(dev) < 0)
+ pr_warning("8021q: failed to change proc name for %s\n",
+ dev->name);
+ break;
+ case NETDEV_REGISTER:
+ if (vlan_proc_add_dev(dev) < 0)
+ pr_warning("8021q: failed to add proc entry for %s\n",
+ dev->name);
+ break;
+ case NETDEV_UNREGISTER:
+ vlan_proc_rem_dev(dev);
+ break;
+ }
+}
+
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);
+ struct vlan_group *grp;
int i, flgs;
struct net_device *vlandev;
- if (dev_net(dev) != &init_net)
- return NOTIFY_DONE;
+ if (is_vlan_dev(dev))
+ __vlan_device_event(dev, event);
+ grp = __vlan_find_group(dev);
if (!grp)
goto out;
}
break;
+ case NETDEV_FEAT_CHANGE:
+ /* Propagate device features to underlying device */
+ for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
+ vlandev = vlan_group_get_device(grp, i);
+ if (!vlandev)
+ continue;
+
+ vlan_transfer_features(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++) {
continue;
dev_change_flags(vlandev, flgs & ~IFF_UP);
+ vlan_transfer_operstate(dev, vlandev);
}
break;
continue;
dev_change_flags(vlandev, flgs | IFF_UP);
+ vlan_transfer_operstate(dev, vlandev);
}
break;
static int vlan_ioctl_handler(struct net *net, void __user *arg)
{
int err;
- unsigned short vid = 0;
struct vlan_ioctl_args args;
struct net_device *dev = NULL;
case GET_VLAN_REALDEV_NAME_CMD:
case GET_VLAN_VID_CMD:
err = -ENODEV;
- dev = __dev_get_by_name(&init_net, args.device1);
+ dev = __dev_get_by_name(net, args.device1);
if (!dev)
goto out;
err = -EINVAL;
- if (args.cmd != ADD_VLAN_CMD &&
- !(dev->priv_flags & IFF_802_1Q_VLAN))
+ if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
goto out;
}
err = -EPERM;
if (!capable(CAP_NET_ADMIN))
break;
- err = vlan_dev_set_vlan_flag(dev,
- args.u.flag,
- args.vlan_qos);
+ err = vlan_dev_change_flags(dev,
+ args.vlan_qos ? args.u.flag : 0,
+ args.u.flag);
break;
case SET_VLAN_NAME_TYPE_CMD:
break;
if ((args.u.name_type >= 0) &&
(args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
- vlan_name_type = args.u.name_type;
+ struct vlan_net *vn;
+
+ vn = net_generic(net, vlan_net_id);
+ vn->name_type = args.u.name_type;
err = 0;
} else {
err = -EINVAL;
case GET_VLAN_VID_CMD:
err = 0;
- vlan_dev_get_vid(dev, &vid);
- args.u.VID = vid;
+ args.u.VID = vlan_dev_vlan_id(dev);
if (copy_to_user(arg, &args,
sizeof(struct vlan_ioctl_args)))
err = -EFAULT;
return err;
}
+static int vlan_init_net(struct net *net)
+{
+ int err;
+ struct vlan_net *vn;
+
+ err = -ENOMEM;
+ vn = kzalloc(sizeof(struct vlan_net), GFP_KERNEL);
+ if (vn == NULL)
+ goto err_alloc;
+
+ err = net_assign_generic(net, vlan_net_id, vn);
+ if (err < 0)
+ goto err_assign;
+
+ vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
+
+ err = vlan_proc_init(net);
+ if (err < 0)
+ goto err_proc;
+
+ return 0;
+
+err_proc:
+ /* nothing */
+err_assign:
+ kfree(vn);
+err_alloc:
+ return err;
+}
+
+static void vlan_exit_net(struct net *net)
+{
+ struct vlan_net *vn;
+
+ vn = net_generic(net, vlan_net_id);
+ rtnl_kill_links(net, &vlan_link_ops);
+ vlan_proc_cleanup(net);
+ kfree(vn);
+}
+
+static struct pernet_operations vlan_net_ops = {
+ .init = vlan_init_net,
+ .exit = vlan_exit_net,
+};
+
static int __init vlan_proto_init(void)
{
int err;
pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright);
pr_info("All bugs added by %s\n", vlan_buggyright);
- err = vlan_proc_init();
+ err = register_pernet_gen_device(&vlan_net_id, &vlan_net_ops);
if (err < 0)
- goto err1;
+ goto err0;
err = register_netdevice_notifier(&vlan_notifier_block);
if (err < 0)
goto err2;
- err = vlan_netlink_init();
+ err = vlan_gvrp_init();
if (err < 0)
goto err3;
+ err = vlan_netlink_init();
+ if (err < 0)
+ goto err4;
+
dev_add_pack(&vlan_packet_type);
vlan_ioctl_set(vlan_ioctl_handler);
return 0;
+err4:
+ vlan_gvrp_uninit();
err3:
unregister_netdevice_notifier(&vlan_notifier_block);
err2:
- vlan_proc_cleanup();
-err1:
+ unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops);
+err0:
return err;
}
for (i = 0; i < VLAN_GRP_HASH_SIZE; i++)
BUG_ON(!hlist_empty(&vlan_group_hash[i]));
- vlan_proc_cleanup();
-
+ unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops);
synchronize_net();
+
+ vlan_gvrp_uninit();
}
module_init(vlan_proto_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff