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-rw-r--r--net/8021q/vlan.c774
1 files changed, 774 insertions, 0 deletions
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
new file mode 100644
index 000000000000..1f6d31670bc7
--- /dev/null
+++ b/net/8021q/vlan.c
@@ -0,0 +1,774 @@
+/*
+ * INET 802.1Q VLAN
+ * Ethernet-type device handling.
+ *
+ * Authors: Ben Greear <greearb@candelatech.com>
+ * Please send support related email to: vlan@scry.wanfear.com
+ * 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.
+ */
+
+#include <asm/uaccess.h> /* for copy_from_user */
+#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 <net/p8022.h>
+#include <net/arp.h>
+#include <linux/rtnetlink.h>
+#include <linux/notifier.h>
+
+#include <linux/if_vlan.h>
+#include "vlan.h"
+#include "vlanproc.h"
+
+#define DRV_VERSION "1.8"
+
+/* Global VLAN variables */
+
+/* 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>";
+
+static int vlan_device_event(struct notifier_block *, unsigned long, void *);
+static int vlan_ioctl_handler(void __user *);
+static int unregister_vlan_dev(struct net_device *, unsigned short );
+
+static struct notifier_block vlan_notifier_block = {
+ .notifier_call = vlan_device_event,
+};
+
+/* These may be changed at run-time through IOCTLs */
+
+/* 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 */
+};
+
+/* Bits of netdev state that are propagated from real device to virtual */
+#define VLAN_LINK_STATE_MASK \
+ ((1<<__LINK_STATE_PRESENT)|(1<<__LINK_STATE_NOCARRIER))
+
+/* End of global variables definitions. */
+
+/*
+ * Function vlan_proto_init (pro)
+ *
+ * Initialize VLAN protocol layer,
+ *
+ */
+static int __init vlan_proto_init(void)
+{
+ int err;
+
+ printk(VLAN_INF "%s v%s %s\n",
+ vlan_fullname, vlan_version, vlan_copyright);
+ printk(VLAN_INF "All bugs added by %s\n",
+ vlan_buggyright);
+
+ /* proc file system initialization */
+ err = vlan_proc_init();
+ if (err < 0) {
+ printk(KERN_ERR
+ "%s %s: can't create entry in proc filesystem!\n",
+ __FUNCTION__, VLAN_NAME);
+ return err;
+ }
+
+ dev_add_pack(&vlan_packet_type);
+
+ /* Register us to receive netdevice events */
+ err = register_netdevice_notifier(&vlan_notifier_block);
+ if (err < 0) {
+ dev_remove_pack(&vlan_packet_type);
+ vlan_proc_cleanup();
+ return err;
+ }
+
+ vlan_ioctl_set(vlan_ioctl_handler);
+
+ return 0;
+}
+
+/* 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();
+}
+
+/*
+ * Module 'remove' entry point.
+ * o delete /proc/net/router directory and static entries.
+ */
+static void __exit vlan_cleanup_module(void)
+{
+ int i;
+
+ vlan_ioctl_set(NULL);
+
+ /* Un-register us from receiving netdevice events */
+ unregister_netdevice_notifier(&vlan_notifier_block);
+
+ dev_remove_pack(&vlan_packet_type);
+ vlan_cleanup_devices();
+
+ /* This table must be empty if there are no module
+ * references left.
+ */
+ for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) {
+ BUG_ON(!hlist_empty(&vlan_group_hash[i]));
+ }
+ vlan_proc_cleanup();
+
+ synchronize_net();
+}
+
+module_init(vlan_proto_init);
+module_exit(vlan_cleanup_module);
+
+/* Must be invoked with RCU read lock (no preempt) */
+static struct vlan_group *__vlan_find_group(int real_dev_ifindex)
+{
+ struct vlan_group *grp;
+ struct hlist_node *n;
+ 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)
+ return grp;
+ }
+
+ return NULL;
+}
+
+/* Find the protocol handler. Assumes VID < VLAN_VID_MASK.
+ *
+ * Must be invoked with RCU read lock (no preempt)
+ */
+struct net_device *__find_vlan_dev(struct net_device *real_dev,
+ unsigned short VID)
+{
+ struct vlan_group *grp = __vlan_find_group(real_dev->ifindex);
+
+ if (grp)
+ return grp->vlan_devices[VID];
+
+ return NULL;
+}
+
+static void vlan_rcu_free(struct rcu_head *rcu)
+{
+ kfree(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)
+{
+ struct net_device *dev = NULL;
+ int real_dev_ifindex = real_dev->ifindex;
+ struct vlan_group *grp;
+ int i, ret;
+
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG "%s: VID: %i\n", __FUNCTION__, vlan_id);
+#endif
+
+ /* sanity check */
+ if (vlan_id >= VLAN_VID_MASK)
+ return -EINVAL;
+
+ ASSERT_RTNL();
+ grp = __vlan_find_group(real_dev_ifindex);
+
+ ret = 0;
+
+ if (grp) {
+ dev = grp->vlan_devices[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_RX | NETIF_F_HW_VLAN_FILTER)) {
+ real_dev->vlan_rx_kill_vid(real_dev, vlan_id);
+ }
+
+ grp->vlan_devices[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);
+
+ /* If the group is now empty, kill off the
+ * group.
+ */
+ for (i = 0; i < VLAN_VID_MASK; i++)
+ if (grp->vlan_devices[i])
+ break;
+
+ if (i == VLAN_VID_MASK) {
+ if (real_dev->features & NETIF_F_HW_VLAN_RX)
+ real_dev->vlan_rx_register(real_dev, NULL);
+
+ hlist_del_rcu(&grp->hlist);
+
+ /* Free the group, after all cpu's are done. */
+ call_rcu(&grp->rcu, vlan_rcu_free);
+
+ grp = NULL;
+ ret = 1;
+ }
+ }
+ }
+
+ return ret;
+}
+
+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;
+}
+
+static void vlan_setup(struct net_device *new_dev)
+{
+ SET_MODULE_OWNER(new_dev);
+
+ /* new_dev->ifindex = 0; it will be set when added to
+ * the global list.
+ * iflink is set as well.
+ */
+ new_dev->get_stats = vlan_dev_get_stats;
+
+ /* Make this thing known as a VLAN device */
+ new_dev->priv_flags |= IFF_802_1Q_VLAN;
+
+ /* Set us up to have no queue, as the underlying Hardware device
+ * can do all the queueing we could want.
+ */
+ new_dev->tx_queue_len = 0;
+
+ /* set up method calls */
+ new_dev->change_mtu = vlan_dev_change_mtu;
+ new_dev->open = vlan_dev_open;
+ new_dev->stop = vlan_dev_stop;
+ new_dev->set_mac_address = vlan_dev_set_mac_address;
+ new_dev->set_multicast_list = vlan_dev_set_multicast_list;
+ new_dev->destructor = free_netdev;
+ new_dev->do_ioctl = vlan_dev_ioctl;
+}
+
+/* Attach a VLAN device to a mac address (ie Ethernet Card).
+ * Returns the device that was created, or NULL if there was
+ * an error of some kind.
+ */
+static struct net_device *register_vlan_device(const char *eth_IF_name,
+ unsigned short VLAN_ID)
+{
+ struct vlan_group *grp;
+ struct net_device *new_dev;
+ struct net_device *real_dev; /* the ethernet device */
+ char name[IFNAMSIZ];
+
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n",
+ __FUNCTION__, eth_IF_name, VLAN_ID);
+#endif
+
+ if (VLAN_ID >= VLAN_VID_MASK)
+ goto out_ret_null;
+
+ /* find the device relating to eth_IF_name. */
+ real_dev = dev_get_by_name(eth_IF_name);
+ if (!real_dev)
+ goto out_ret_null;
+
+ if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
+ printk(VLAN_DBG "%s: VLANs not supported on %s.\n",
+ __FUNCTION__, real_dev->name);
+ goto out_put_dev;
+ }
+
+ if ((real_dev->features & NETIF_F_HW_VLAN_RX) &&
+ (real_dev->vlan_rx_register == NULL ||
+ real_dev->vlan_rx_kill_vid == NULL)) {
+ printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n",
+ __FUNCTION__, real_dev->name);
+ goto out_put_dev;
+ }
+
+ if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) &&
+ (real_dev->vlan_rx_add_vid == NULL ||
+ real_dev->vlan_rx_kill_vid == NULL)) {
+ printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n",
+ __FUNCTION__, real_dev->name);
+ goto out_put_dev;
+ }
+
+ /* From this point on, all the data structures must remain
+ * consistent.
+ */
+ rtnl_lock();
+
+ /* The real device must be up and operating in order to
+ * assosciate a VLAN device with it.
+ */
+ if (!(real_dev->flags & IFF_UP))
+ goto out_unlock;
+
+ if (__find_vlan_dev(real_dev, VLAN_ID) != NULL) {
+ /* was already registered. */
+ printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__);
+ goto out_unlock;
+ }
+
+ /* Gotta set up the fields for the device. */
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n",
+ vlan_name_type);
+#endif
+ switch (vlan_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_info), name,
+ vlan_setup);
+ if (new_dev == NULL)
+ goto out_unlock;
+
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name);
+#endif
+ /* IFF_BROADCAST|IFF_MULTICAST; ??? */
+ new_dev->flags = real_dev->flags;
+ new_dev->flags &= ~IFF_UP;
+
+ new_dev->state = real_dev->state & VLAN_LINK_STATE_MASK;
+
+ /* need 4 bytes for extra VLAN header info,
+ * hope the underlying device can handle it.
+ */
+ new_dev->mtu = real_dev->mtu;
+
+ /* TODO: maybe just assign it to be ETHERNET? */
+ new_dev->type = real_dev->type;
+
+ new_dev->hard_header_len = real_dev->hard_header_len;
+ if (!(real_dev->features & NETIF_F_HW_VLAN_TX)) {
+ /* Regular ethernet + 4 bytes (18 total). */
+ new_dev->hard_header_len += VLAN_HLEN;
+ }
+
+ VLAN_MEM_DBG("new_dev->priv malloc, addr: %p size: %i\n",
+ new_dev->priv,
+ sizeof(struct vlan_dev_info));
+
+ memcpy(new_dev->broadcast, real_dev->broadcast, real_dev->addr_len);
+ memcpy(new_dev->dev_addr, real_dev->dev_addr, real_dev->addr_len);
+ new_dev->addr_len = real_dev->addr_len;
+
+ if (real_dev->features & NETIF_F_HW_VLAN_TX) {
+ new_dev->hard_header = real_dev->hard_header;
+ new_dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit;
+ new_dev->rebuild_header = real_dev->rebuild_header;
+ } else {
+ new_dev->hard_header = vlan_dev_hard_header;
+ new_dev->hard_start_xmit = vlan_dev_hard_start_xmit;
+ new_dev->rebuild_header = vlan_dev_rebuild_header;
+ }
+ new_dev->hard_header_parse = real_dev->hard_header_parse;
+
+ 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 = 1;
+
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG "About to go find the group for idx: %i\n",
+ real_dev->ifindex);
+#endif
+
+ if (register_netdevice(new_dev))
+ goto out_free_newdev;
+
+ /* So, got the sucker initialized, now lets place
+ * it into our local structure.
+ */
+ grp = __vlan_find_group(real_dev->ifindex);
+
+ /* Note, we are running under the RTNL semaphore
+ * so it cannot "appear" on us.
+ */
+ if (!grp) { /* need to add a new group */
+ grp = kmalloc(sizeof(struct vlan_group), GFP_KERNEL);
+ if (!grp)
+ goto out_free_unregister;
+
+ /* printk(KERN_ALERT "VLAN REGISTER: Allocated new group.\n"); */
+ memset(grp, 0, sizeof(struct vlan_group));
+ grp->real_dev_ifindex = real_dev->ifindex;
+
+ hlist_add_head_rcu(&grp->hlist,
+ &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]);
+
+ if (real_dev->features & NETIF_F_HW_VLAN_RX)
+ real_dev->vlan_rx_register(real_dev, grp);
+ }
+
+ grp->vlan_devices[VLAN_ID] = new_dev;
+
+ if (vlan_proc_add_dev(new_dev)<0)/* create it's proc entry */
+ printk(KERN_WARNING "VLAN: failed to add proc entry for %s\n",
+ new_dev->name);
+
+ if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
+ real_dev->vlan_rx_add_vid(real_dev, VLAN_ID);
+
+ rtnl_unlock();
+
+
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG "Allocated new device successfully, returning.\n");
+#endif
+ return new_dev;
+
+out_free_unregister:
+ unregister_netdev(new_dev);
+ goto out_unlock;
+
+out_free_newdev:
+ free_netdev(new_dev);
+
+out_unlock:
+ rtnl_unlock();
+
+out_put_dev:
+ dev_put(real_dev);
+
+out_ret_null:
+ return NULL;
+}
+
+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 */
+ flgs = dev->state & VLAN_LINK_STATE_MASK;
+ for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
+ vlandev = grp->vlan_devices[i];
+ if (!vlandev)
+ continue;
+
+ if ((vlandev->state & VLAN_LINK_STATE_MASK) != flgs) {
+ vlandev->state = (vlandev->state &~ VLAN_LINK_STATE_MASK)
+ | flgs;
+ netdev_state_change(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 = 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);
+
+ unregister_netdevice(vlandev);
+
+ /* Group was destroyed? */
+ if (ret == 1)
+ break;
+ }
+ break;
+ };
+
+out:
+ return NOTIFY_DONE;
+}
+
+/*
+ * 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(void __user *arg)
+{
+ int err = 0;
+ unsigned short vid = 0;
+ struct vlan_ioctl_args args;
+
+ 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;
+
+#ifdef VLAN_DEBUG
+ printk(VLAN_DBG "%s: args.cmd: %x\n", __FUNCTION__, args.cmd);
+#endif
+
+ switch (args.cmd) {
+ case SET_VLAN_INGRESS_PRIORITY_CMD:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ err = vlan_dev_set_ingress_priority(args.device1,
+ args.u.skb_priority,
+ args.vlan_qos);
+ break;
+
+ case SET_VLAN_EGRESS_PRIORITY_CMD:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ err = vlan_dev_set_egress_priority(args.device1,
+ args.u.skb_priority,
+ args.vlan_qos);
+ break;
+
+ case SET_VLAN_FLAG_CMD:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ err = vlan_dev_set_vlan_flag(args.device1,
+ args.u.flag,
+ args.vlan_qos);
+ break;
+
+ case SET_VLAN_NAME_TYPE_CMD:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ if ((args.u.name_type >= 0) &&
+ (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
+ vlan_name_type = args.u.name_type;
+ err = 0;
+ } else {
+ err = -EINVAL;
+ }
+ break;
+
+ case ADD_VLAN_CMD:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ /* we have been given the name of the Ethernet Device we want to
+ * talk to: args.dev1 We also have the
+ * VLAN ID: args.u.VID
+ */
+ if (register_vlan_device(args.device1, args.u.VID)) {
+ err = 0;
+ } else {
+ err = -EINVAL;
+ }
+ break;
+
+ case DEL_VLAN_CMD:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ /* Here, the args.dev1 is the actual VLAN we want
+ * to get rid of.
+ */
+ err = unregister_vlan_device(args.device1);
+ break;
+
+ case GET_VLAN_INGRESS_PRIORITY_CMD:
+ /* TODO: Implement
+ err = vlan_dev_get_ingress_priority(args);
+ if (copy_to_user((void*)arg, &args,
+ sizeof(struct vlan_ioctl_args))) {
+ err = -EFAULT;
+ }
+ */
+ err = -EINVAL;
+ break;
+ case GET_VLAN_EGRESS_PRIORITY_CMD:
+ /* TODO: Implement
+ err = vlan_dev_get_egress_priority(args.device1, &(args.args);
+ if (copy_to_user((void*)arg, &args,
+ sizeof(struct vlan_ioctl_args))) {
+ err = -EFAULT;
+ }
+ */
+ err = -EINVAL;
+ break;
+ case GET_VLAN_REALDEV_NAME_CMD:
+ err = vlan_dev_get_realdev_name(args.device1, args.u.device2);
+ if (copy_to_user(arg, &args,
+ sizeof(struct vlan_ioctl_args))) {
+ err = -EFAULT;
+ }
+ break;
+
+ case GET_VLAN_VID_CMD:
+ err = vlan_dev_get_vid(args.device1, &vid);
+ args.u.VID = vid;
+ if (copy_to_user(arg, &args,
+ sizeof(struct vlan_ioctl_args))) {
+ err = -EFAULT;
+ }
+ break;
+
+ default:
+ /* pass on to underlying device instead?? */
+ printk(VLAN_DBG "%s: Unknown VLAN CMD: %x \n",
+ __FUNCTION__, args.cmd);
+ return -EINVAL;
+ };
+
+ return err;
+}
+
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-03 08:40:58 +0000