![Andrew Morton](/assets/img/avatar_default.png)
net/8021q/vlan.c: In function 'vlan_ioctl_handler': net/8021q/vlan.c:700: warning: 'err' may be used uninitialized in this function The warning is incorrect, but from my reading this ioctl will return -EINVAL on success. Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
845 lines
20 KiB
C
845 lines
20 KiB
C
/*
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* INET 802.1Q VLAN
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* Ethernet-type device handling.
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*
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* Authors: Ben Greear <greearb@candelatech.com>
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* Please send support related email to: vlan@scry.wanfear.com
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* VLAN Home Page: http://www.candelatech.com/~greear/vlan.html
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*
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* Fixes:
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* Fix for packet capture - Nick Eggleston <nick@dccinc.com>;
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* Add HW acceleration hooks - David S. Miller <davem@redhat.com>;
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* Correct all the locking - David S. Miller <davem@redhat.com>;
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* Use hash table for VLAN groups - David S. Miller <davem@redhat.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <asm/uaccess.h> /* for copy_from_user */
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#include <linux/capability.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/skbuff.h>
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#include <net/datalink.h>
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#include <linux/mm.h>
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#include <linux/in.h>
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#include <linux/init.h>
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#include <net/p8022.h>
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#include <net/arp.h>
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#include <linux/rtnetlink.h>
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#include <linux/notifier.h>
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#include <linux/if_vlan.h>
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#include "vlan.h"
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#include "vlanproc.h"
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#define DRV_VERSION "1.8"
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/* Global VLAN variables */
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/* Our listing of VLAN group(s) */
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static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE];
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#define vlan_grp_hashfn(IDX) ((((IDX) >> VLAN_GRP_HASH_SHIFT) ^ (IDX)) & VLAN_GRP_HASH_MASK)
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static char vlan_fullname[] = "802.1Q VLAN Support";
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static char vlan_version[] = DRV_VERSION;
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static char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>";
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static char vlan_buggyright[] = "David S. Miller <davem@redhat.com>";
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static int vlan_device_event(struct notifier_block *, unsigned long, void *);
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static int vlan_ioctl_handler(void __user *);
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static int unregister_vlan_dev(struct net_device *, unsigned short );
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static struct notifier_block vlan_notifier_block = {
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.notifier_call = vlan_device_event,
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};
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/* These may be changed at run-time through IOCTLs */
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/* Determines interface naming scheme. */
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unsigned short vlan_name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
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static struct packet_type vlan_packet_type = {
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.type = __constant_htons(ETH_P_8021Q),
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.func = vlan_skb_recv, /* VLAN receive method */
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};
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/* End of global variables definitions. */
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/*
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* Function vlan_proto_init (pro)
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*
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* Initialize VLAN protocol layer,
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*
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*/
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static int __init vlan_proto_init(void)
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{
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int err;
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printk(VLAN_INF "%s v%s %s\n",
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vlan_fullname, vlan_version, vlan_copyright);
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printk(VLAN_INF "All bugs added by %s\n",
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vlan_buggyright);
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/* proc file system initialization */
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err = vlan_proc_init();
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if (err < 0) {
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printk(KERN_ERR
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"%s %s: can't create entry in proc filesystem!\n",
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__FUNCTION__, VLAN_NAME);
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return err;
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}
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dev_add_pack(&vlan_packet_type);
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/* Register us to receive netdevice events */
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err = register_netdevice_notifier(&vlan_notifier_block);
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if (err < 0)
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goto err1;
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err = vlan_netlink_init();
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if (err < 0)
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goto err2;
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vlan_ioctl_set(vlan_ioctl_handler);
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return 0;
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err2:
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unregister_netdevice_notifier(&vlan_notifier_block);
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err1:
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vlan_proc_cleanup();
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dev_remove_pack(&vlan_packet_type);
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return err;
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}
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/*
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* Module 'remove' entry point.
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* o delete /proc/net/router directory and static entries.
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*/
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static void __exit vlan_cleanup_module(void)
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{
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int i;
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vlan_netlink_fini();
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vlan_ioctl_set(NULL);
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/* Un-register us from receiving netdevice events */
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unregister_netdevice_notifier(&vlan_notifier_block);
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dev_remove_pack(&vlan_packet_type);
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/* This table must be empty if there are no module
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* references left.
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*/
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for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) {
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BUG_ON(!hlist_empty(&vlan_group_hash[i]));
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}
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vlan_proc_cleanup();
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synchronize_net();
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}
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module_init(vlan_proto_init);
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module_exit(vlan_cleanup_module);
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/* Must be invoked with RCU read lock (no preempt) */
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static struct vlan_group *__vlan_find_group(int real_dev_ifindex)
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{
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struct vlan_group *grp;
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struct hlist_node *n;
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int hash = vlan_grp_hashfn(real_dev_ifindex);
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hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) {
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if (grp->real_dev_ifindex == real_dev_ifindex)
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return grp;
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}
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return NULL;
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}
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/* Find the protocol handler. Assumes VID < VLAN_VID_MASK.
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*
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* Must be invoked with RCU read lock (no preempt)
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*/
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struct net_device *__find_vlan_dev(struct net_device *real_dev,
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unsigned short VID)
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{
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struct vlan_group *grp = __vlan_find_group(real_dev->ifindex);
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if (grp)
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return vlan_group_get_device(grp, VID);
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return NULL;
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}
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static void vlan_group_free(struct vlan_group *grp)
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{
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int i;
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for (i=0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++)
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kfree(grp->vlan_devices_arrays[i]);
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kfree(grp);
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}
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static struct vlan_group *vlan_group_alloc(int ifindex)
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{
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struct vlan_group *grp;
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unsigned int size;
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unsigned int i;
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grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL);
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if (!grp)
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return NULL;
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size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN;
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for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) {
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grp->vlan_devices_arrays[i] = kzalloc(size, GFP_KERNEL);
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if (!grp->vlan_devices_arrays[i])
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goto err;
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}
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grp->real_dev_ifindex = ifindex;
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hlist_add_head_rcu(&grp->hlist,
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&vlan_group_hash[vlan_grp_hashfn(ifindex)]);
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return grp;
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err:
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vlan_group_free(grp);
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return NULL;
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}
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static void vlan_rcu_free(struct rcu_head *rcu)
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{
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vlan_group_free(container_of(rcu, struct vlan_group, rcu));
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}
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/* This returns 0 if everything went fine.
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* It will return 1 if the group was killed as a result.
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* A negative return indicates failure.
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*
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* The RTNL lock must be held.
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*/
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static int unregister_vlan_dev(struct net_device *real_dev,
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unsigned short vlan_id)
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{
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struct net_device *dev = NULL;
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int real_dev_ifindex = real_dev->ifindex;
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struct vlan_group *grp;
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int i, ret;
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#ifdef VLAN_DEBUG
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printk(VLAN_DBG "%s: VID: %i\n", __FUNCTION__, vlan_id);
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#endif
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/* sanity check */
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if (vlan_id >= VLAN_VID_MASK)
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return -EINVAL;
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ASSERT_RTNL();
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grp = __vlan_find_group(real_dev_ifindex);
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ret = 0;
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if (grp) {
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dev = vlan_group_get_device(grp, vlan_id);
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if (dev) {
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/* Remove proc entry */
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vlan_proc_rem_dev(dev);
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/* Take it out of our own structures, but be sure to
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* interlock with HW accelerating devices or SW vlan
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* input packet processing.
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*/
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if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
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real_dev->vlan_rx_kill_vid(real_dev, vlan_id);
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vlan_group_set_device(grp, vlan_id, NULL);
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synchronize_net();
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/* Caller unregisters (and if necessary, puts)
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* VLAN device, but we get rid of the reference to
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* real_dev here.
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*/
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dev_put(real_dev);
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/* If the group is now empty, kill off the
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* group.
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*/
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for (i = 0; i < VLAN_VID_MASK; i++)
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if (vlan_group_get_device(grp, i))
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break;
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if (i == VLAN_VID_MASK) {
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if (real_dev->features & NETIF_F_HW_VLAN_RX)
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real_dev->vlan_rx_register(real_dev, NULL);
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hlist_del_rcu(&grp->hlist);
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/* Free the group, after all cpu's are done. */
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call_rcu(&grp->rcu, vlan_rcu_free);
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grp = NULL;
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ret = 1;
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}
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}
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}
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return ret;
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}
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int unregister_vlan_device(struct net_device *dev)
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{
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int ret;
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ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev,
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VLAN_DEV_INFO(dev)->vlan_id);
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unregister_netdevice(dev);
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if (ret == 1)
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ret = 0;
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return ret;
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}
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/*
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* vlan network devices have devices nesting below it, and are a special
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* "super class" of normal network devices; split their locks off into a
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* separate class since they always nest.
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*/
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static struct lock_class_key vlan_netdev_xmit_lock_key;
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static int vlan_dev_init(struct net_device *dev)
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{
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struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev;
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/* IFF_BROADCAST|IFF_MULTICAST; ??? */
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dev->flags = real_dev->flags & ~IFF_UP;
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dev->iflink = real_dev->ifindex;
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dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
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(1<<__LINK_STATE_DORMANT))) |
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(1<<__LINK_STATE_PRESENT);
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if (is_zero_ether_addr(dev->dev_addr))
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memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len);
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if (is_zero_ether_addr(dev->broadcast))
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memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
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if (real_dev->features & NETIF_F_HW_VLAN_TX) {
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dev->hard_header = real_dev->hard_header;
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dev->hard_header_len = real_dev->hard_header_len;
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dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit;
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dev->rebuild_header = real_dev->rebuild_header;
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} else {
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dev->hard_header = vlan_dev_hard_header;
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dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
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dev->hard_start_xmit = vlan_dev_hard_start_xmit;
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dev->rebuild_header = vlan_dev_rebuild_header;
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}
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dev->hard_header_parse = real_dev->hard_header_parse;
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dev->hard_header_cache = NULL;
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lockdep_set_class(&dev->_xmit_lock, &vlan_netdev_xmit_lock_key);
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return 0;
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}
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void vlan_setup(struct net_device *new_dev)
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{
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SET_MODULE_OWNER(new_dev);
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ether_setup(new_dev);
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/* new_dev->ifindex = 0; it will be set when added to
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* the global list.
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* iflink is set as well.
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*/
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new_dev->get_stats = vlan_dev_get_stats;
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/* Make this thing known as a VLAN device */
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new_dev->priv_flags |= IFF_802_1Q_VLAN;
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/* Set us up to have no queue, as the underlying Hardware device
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* can do all the queueing we could want.
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*/
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new_dev->tx_queue_len = 0;
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/* set up method calls */
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new_dev->change_mtu = vlan_dev_change_mtu;
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new_dev->init = vlan_dev_init;
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new_dev->open = vlan_dev_open;
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new_dev->stop = vlan_dev_stop;
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new_dev->set_multicast_list = vlan_dev_set_multicast_list;
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new_dev->change_rx_flags = vlan_change_rx_flags;
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new_dev->destructor = free_netdev;
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new_dev->do_ioctl = vlan_dev_ioctl;
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memset(new_dev->broadcast, 0, ETH_ALEN);
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}
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static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev)
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{
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/* Have to respect userspace enforced dormant state
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* of real device, also must allow supplicant running
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* on VLAN device
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*/
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if (dev->operstate == IF_OPER_DORMANT)
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netif_dormant_on(vlandev);
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else
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netif_dormant_off(vlandev);
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if (netif_carrier_ok(dev)) {
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if (!netif_carrier_ok(vlandev))
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netif_carrier_on(vlandev);
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} else {
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if (netif_carrier_ok(vlandev))
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netif_carrier_off(vlandev);
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}
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}
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int vlan_check_real_dev(struct net_device *real_dev, unsigned short vlan_id)
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{
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if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
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printk(VLAN_DBG "%s: VLANs not supported on %s.\n",
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__FUNCTION__, real_dev->name);
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return -EOPNOTSUPP;
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}
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if ((real_dev->features & NETIF_F_HW_VLAN_RX) &&
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!real_dev->vlan_rx_register) {
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printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n",
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__FUNCTION__, real_dev->name);
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return -EOPNOTSUPP;
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}
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if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) &&
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(!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) {
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printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n",
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__FUNCTION__, real_dev->name);
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return -EOPNOTSUPP;
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}
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|
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/* The real device must be up and operating in order to
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* assosciate a VLAN device with it.
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*/
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if (!(real_dev->flags & IFF_UP))
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return -ENETDOWN;
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if (__find_vlan_dev(real_dev, vlan_id) != NULL) {
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/* was already registered. */
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printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__);
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return -EEXIST;
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}
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|
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return 0;
|
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}
|
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|
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int register_vlan_dev(struct net_device *dev)
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{
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struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
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struct net_device *real_dev = vlan->real_dev;
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unsigned short vlan_id = vlan->vlan_id;
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struct vlan_group *grp, *ngrp = NULL;
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int err;
|
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|
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grp = __vlan_find_group(real_dev->ifindex);
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if (!grp) {
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ngrp = grp = vlan_group_alloc(real_dev->ifindex);
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if (!grp)
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return -ENOBUFS;
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}
|
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err = register_netdevice(dev);
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if (err < 0)
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goto out_free_group;
|
|
|
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/* Account for reference in struct vlan_dev_info */
|
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dev_hold(real_dev);
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vlan_transfer_operstate(real_dev, dev);
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linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
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|
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/* So, got the sucker initialized, now lets place
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* it into our local structure.
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*/
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vlan_group_set_device(grp, vlan_id, dev);
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if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX)
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real_dev->vlan_rx_register(real_dev, ngrp);
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if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
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real_dev->vlan_rx_add_vid(real_dev, vlan_id);
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if (vlan_proc_add_dev(dev) < 0)
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printk(KERN_WARNING "VLAN: failed to add proc entry for %s\n",
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dev->name);
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return 0;
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out_free_group:
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if (ngrp)
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vlan_group_free(ngrp);
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return err;
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}
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|
|
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/* Attach a VLAN device to a mac address (ie Ethernet Card).
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* Returns 0 if the device was created or a negative error code otherwise.
|
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*/
|
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static int register_vlan_device(struct net_device *real_dev,
|
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unsigned short VLAN_ID)
|
|
{
|
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struct net_device *new_dev;
|
|
char name[IFNAMSIZ];
|
|
int err;
|
|
|
|
#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)
|
|
return -ERANGE;
|
|
|
|
err = vlan_check_real_dev(real_dev, VLAN_ID);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
/* 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)
|
|
return -ENOBUFS;
|
|
|
|
/* need 4 bytes for extra VLAN header info,
|
|
* hope the underlying device can handle it.
|
|
*/
|
|
new_dev->mtu = real_dev->mtu;
|
|
|
|
#ifdef VLAN_DEBUG
|
|
printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name);
|
|
VLAN_MEM_DBG("new_dev->priv malloc, addr: %p size: %i\n",
|
|
new_dev->priv,
|
|
sizeof(struct vlan_dev_info));
|
|
#endif
|
|
|
|
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);
|
|
if (err < 0)
|
|
goto out_free_newdev;
|
|
|
|
/* Account for reference in struct vlan_dev_info */
|
|
dev_hold(real_dev);
|
|
#ifdef VLAN_DEBUG
|
|
printk(VLAN_DBG "Allocated new device successfully, returning.\n");
|
|
#endif
|
|
return 0;
|
|
|
|
out_free_newdev:
|
|
free_netdev(new_dev);
|
|
return err;
|
|
}
|
|
|
|
static void vlan_sync_address(struct net_device *dev,
|
|
struct net_device *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))
|
|
return;
|
|
|
|
/* vlan address was different from the old address and is equal to
|
|
* the new address */
|
|
if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
|
|
!compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
|
|
dev_unicast_delete(dev, vlandev->dev_addr, ETH_ALEN);
|
|
|
|
/* vlan address was equal to the old address and is different from
|
|
* the new address */
|
|
if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
|
|
compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
|
|
dev_unicast_add(dev, vlandev->dev_addr, ETH_ALEN);
|
|
|
|
memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN);
|
|
}
|
|
|
|
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_CHANGEADDR:
|
|
/* Adjust unicast filters on underlying device */
|
|
for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
|
|
vlandev = vlan_group_get_device(grp, i);
|
|
if (!vlandev)
|
|
continue;
|
|
|
|
vlan_sync_address(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;
|
|
|
|
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;
|
|
unsigned short vid = 0;
|
|
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;
|
|
|
|
#ifdef VLAN_DEBUG
|
|
printk(VLAN_DBG "%s: args.cmd: %x\n", __FUNCTION__, args.cmd);
|
|
#endif
|
|
|
|
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(args.device1);
|
|
if (!dev)
|
|
goto out;
|
|
|
|
err = -EINVAL;
|
|
if (args.cmd != ADD_VLAN_CMD &&
|
|
!(dev->priv_flags & IFF_802_1Q_VLAN))
|
|
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);
|
|
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_set_vlan_flag(dev,
|
|
args.u.flag,
|
|
args.vlan_qos);
|
|
break;
|
|
|
|
case SET_VLAN_NAME_TYPE_CMD:
|
|
err = -EPERM;
|
|
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:
|
|
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;
|
|
err = unregister_vlan_device(dev);
|
|
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 = 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;
|
|
vlan_dev_get_vid(dev, &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);
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
out:
|
|
rtnl_unlock();
|
|
return err;
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(DRV_VERSION);
|