* Ethernet-type device handling.
*
* Authors: Ben Greear <greearb@candelatech.com>
- * Please send support related email to: vlan@scry.wanfear.com
+ * Please send support related email to: netdev@vger.kernel.org
* VLAN Home Page: http://www.candelatech.com/~greear/vlan.html
*
* Fixes:
#include <linux/rtnetlink.h>
#include <linux/notifier.h>
#include <net/net_namespace.h>
+#include <net/netns/generic.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];
-#define vlan_grp_hashfn(IDX) ((((IDX) >> VLAN_GRP_HASH_SHIFT) ^ (IDX)) & VLAN_GRP_HASH_MASK)
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;
-
static struct packet_type vlan_packet_type = {
.type = __constant_htons(ETH_P_8021Q),
.func = vlan_skb_recv, /* VLAN receive method */
/* End of global variables definitions. */
+static inline unsigned int vlan_grp_hashfn(unsigned int idx)
+{
+ return ((idx >> VLAN_GRP_HASH_SHIFT) ^ idx) & VLAN_GRP_HASH_MASK;
+}
+
/* 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;
}
struct net_device *__find_vlan_dev(struct net_device *real_dev,
unsigned short VID)
{
- 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);
{
int i;
- for (i=0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++)
+ for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++)
kfree(grp->vlan_devices_arrays[i]);
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, int vid)
+{
+ struct net_device **array;
+ unsigned int size;
+
+ ASSERT_RTNL();
+
+ array = vg->vlan_devices_arrays[vid / 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[vid / VLAN_GROUP_ARRAY_PART_LEN] = array;
+ return 0;
}
static void vlan_rcu_free(struct rcu_head *rcu)
vlan_group_free(container_of(rcu, struct vlan_group, rcu));
}
-
-/* This returns 0 if everything went fine.
- * It will return 1 if the group was killed as a result.
- * A negative return indicates failure.
- *
- * The RTNL lock must be held.
- */
-static int unregister_vlan_dev(struct net_device *real_dev,
- unsigned short vlan_id)
+void unregister_vlan_dev(struct net_device *dev)
{
- struct net_device *dev = NULL;
- int real_dev_ifindex = real_dev->ifindex;
+ struct vlan_dev_info *vlan = vlan_dev_info(dev);
+ struct net_device *real_dev = vlan->real_dev;
struct vlan_group *grp;
- int i, ret;
-
- /* sanity check */
- if (vlan_id >= VLAN_VID_MASK)
- return -EINVAL;
+ unsigned short vlan_id = vlan->vlan_id;
ASSERT_RTNL();
- grp = __vlan_find_group(real_dev_ifindex);
-
- ret = 0;
-
- if (grp) {
- dev = vlan_group_get_device(grp, vlan_id);
- if (dev) {
- /* Remove proc entry */
- 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);
+ grp = __vlan_find_group(real_dev);
+ BUG_ON(!grp);
- vlan_group_set_device(grp, vlan_id, NULL);
- synchronize_net();
-
-
- /* Caller unregisters (and if necessary, puts)
- * VLAN device, but we get rid of the reference to
- * real_dev here.
- */
- dev_put(real_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);
- /* If the group is now empty, kill off the
- * group.
- */
- for (i = 0; i < VLAN_VID_MASK; i++)
- if (vlan_group_get_device(grp, i))
- break;
+ vlan_group_set_device(grp, vlan_id, NULL);
+ grp->nr_vlans--;
- if (i == VLAN_VID_MASK) {
- if (real_dev->features & NETIF_F_HW_VLAN_RX)
- real_dev->vlan_rx_register(real_dev, NULL);
+ synchronize_net();
- hlist_del_rcu(&grp->hlist);
+ /* If the group is now empty, kill off the group. */
+ if (grp->nr_vlans == 0) {
+ if (real_dev->features & NETIF_F_HW_VLAN_RX)
+ real_dev->vlan_rx_register(real_dev, NULL);
- /* Free the group, after all cpu's are done. */
- call_rcu(&grp->rcu, vlan_rcu_free);
+ hlist_del_rcu(&grp->hlist);
- grp = NULL;
- ret = 1;
- }
- }
+ /* Free the group, after all cpu's are done. */
+ call_rcu(&grp->rcu, vlan_rcu_free);
}
- return ret;
-}
+ /* Get rid of the vlan's reference to real_dev */
+ dev_put(real_dev);
-int unregister_vlan_device(struct net_device *dev)
-{
- int ret;
-
- ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev,
- VLAN_DEV_INFO(dev)->vlan_id);
unregister_netdevice(dev);
-
- if (ret == 1)
- ret = 0;
- return ret;
}
-static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev)
+static void vlan_transfer_operstate(const struct net_device *dev,
+ struct net_device *vlandev)
{
/* Have to respect userspace enforced dormant state
* of real device, also must allow supplicant running
int register_vlan_dev(struct net_device *dev)
{
- struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
+ struct vlan_dev_info *vlan = vlan_dev_info(dev);
struct net_device *real_dev = vlan->real_dev;
unsigned short 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_group_prealloc_vid(grp, vlan_id);
+ if (err < 0)
+ goto out_free_group;
+
err = register_netdevice(dev);
if (err < 0)
goto out_free_group;
* it into our local structure.
*/
vlan_group_set_device(grp, vlan_id, dev);
+ grp->nr_vlans++;
+
if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX)
real_dev->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);
- if (vlan_proc_add_dev(dev) < 0)
- pr_warning("8021q: failed to add proc entry for %s\n",
- dev->name);
return 0;
out_free_group:
unsigned short 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;
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);
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)->real_dev = real_dev;
- VLAN_DEV_INFO(new_dev)->dent = NULL;
- VLAN_DEV_INFO(new_dev)->flags = VLAN_FLAG_REORDER_HDR;
+ vlan_dev_info(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */
+ 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;
new_dev->rtnl_link_ops = &vlan_link_ops;
err = register_vlan_dev(new_dev);
static void vlan_sync_address(struct net_device *dev,
struct net_device *vlandev)
{
- struct vlan_dev_info *vlan = VLAN_DEV_INFO(vlandev);
+ struct vlan_dev_info *vlan = vlan_dev_info(vlandev);
/* May be called without an actual change */
if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr))
memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN);
}
-static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
+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->nd_net != &init_net)
- return NOTIFY_DONE;
+ if (is_vlan_dev(dev)) {
+ __vlan_device_event(dev, event);
+ goto out;
+ }
+ grp = __vlan_find_group(dev);
if (!grp)
goto out;
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;
- ret = unregister_vlan_dev(dev,
- VLAN_DEV_INFO(vlandev)->vlan_id);
-
- unregister_netdevice(vlandev);
+ /* unregistration of last vlan destroys group, abort
+ * afterwards */
+ if (grp->nr_vlans == 1)
+ i = VLAN_GROUP_ARRAY_LEN;
- /* Group was destroyed? */
- if (ret == 1)
- break;
+ unregister_vlan_dev(vlandev);
}
break;
}
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;
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;
err = -EPERM;
if (!capable(CAP_NET_ADMIN))
break;
- err = unregister_vlan_device(dev);
+ unregister_vlan_dev(dev);
+ 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))) {
+ sizeof(struct vlan_ioctl_args)))
err = -EFAULT;
- }
break;
case GET_VLAN_VID_CMD:
vlan_dev_get_vid(dev, &vid);
args.u.VID = vid;
if (copy_to_user(arg, &args,
- sizeof(struct vlan_ioctl_args))) {
+ sizeof(struct vlan_ioctl_args)))
err = -EFAULT;
- }
break;
default:
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)
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();
}
projects / linux-2.6 / blobdiff