![Sabrina Dubroca](/assets/img/avatar_default.png)
Currently, GRO can do unlimited recursion through the gro_receive handlers. This was fixed for tunneling protocols by limiting tunnel GRO to one level with encap_mark, but both VLAN and TEB still have this problem. Thus, the kernel is vulnerable to a stack overflow, if we receive a packet composed entirely of VLAN headers. This patch adds a recursion counter to the GRO layer to prevent stack overflow. When a gro_receive function hits the recursion limit, GRO is aborted for this skb and it is processed normally. This recursion counter is put in the GRO CB, but could be turned into a percpu counter if we run out of space in the CB. Thanks to Vladimír Beneš <vbenes@redhat.com> for the initial bug report. Fixes: CVE-2016-7039 Fixes:9b174d88c2
("net: Add Transparent Ethernet Bridging GRO support.") Fixes:66e5133f19
("vlan: Add GRO support for non hardware accelerated vlan") Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Reviewed-by: Jiri Benc <jbenc@redhat.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Tom Herbert <tom@herbertland.com> Signed-off-by: David S. Miller <davem@davemloft.net>
806 lines
19 KiB
C
806 lines
19 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: netdev@vger.kernel.org
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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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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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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 <linux/slab.h>
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#include <linux/init.h>
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#include <linux/rculist.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 <net/rtnetlink.h>
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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#include <asm/uaccess.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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int vlan_net_id __read_mostly;
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const char vlan_fullname[] = "802.1Q VLAN Support";
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const char vlan_version[] = DRV_VERSION;
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/* End of global variables definitions. */
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static int vlan_group_prealloc_vid(struct vlan_group *vg,
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__be16 vlan_proto, u16 vlan_id)
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{
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struct net_device **array;
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unsigned int pidx, vidx;
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unsigned int size;
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ASSERT_RTNL();
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pidx = vlan_proto_idx(vlan_proto);
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vidx = vlan_id / VLAN_GROUP_ARRAY_PART_LEN;
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array = vg->vlan_devices_arrays[pidx][vidx];
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if (array != NULL)
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return 0;
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size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN;
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array = kzalloc(size, GFP_KERNEL);
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if (array == NULL)
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return -ENOBUFS;
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vg->vlan_devices_arrays[pidx][vidx] = array;
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return 0;
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}
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void unregister_vlan_dev(struct net_device *dev, struct list_head *head)
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{
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struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
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struct net_device *real_dev = vlan->real_dev;
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struct vlan_info *vlan_info;
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struct vlan_group *grp;
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u16 vlan_id = vlan->vlan_id;
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ASSERT_RTNL();
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vlan_info = rtnl_dereference(real_dev->vlan_info);
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BUG_ON(!vlan_info);
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grp = &vlan_info->grp;
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grp->nr_vlan_devs--;
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if (vlan->flags & VLAN_FLAG_MVRP)
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vlan_mvrp_request_leave(dev);
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if (vlan->flags & VLAN_FLAG_GVRP)
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vlan_gvrp_request_leave(dev);
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vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL);
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netdev_upper_dev_unlink(real_dev, dev);
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/* Because unregister_netdevice_queue() makes sure at least one rcu
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* grace period is respected before device freeing,
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* we dont need to call synchronize_net() here.
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*/
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unregister_netdevice_queue(dev, head);
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if (grp->nr_vlan_devs == 0) {
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vlan_mvrp_uninit_applicant(real_dev);
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vlan_gvrp_uninit_applicant(real_dev);
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}
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/* Take it out of our own structures, but be sure to interlock with
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* HW accelerating devices or SW vlan input packet processing if
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* VLAN is not 0 (leave it there for 802.1p).
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*/
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if (vlan_id)
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vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id);
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/* Get rid of the vlan's reference to real_dev */
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dev_put(real_dev);
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}
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int vlan_check_real_dev(struct net_device *real_dev,
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__be16 protocol, u16 vlan_id)
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{
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const char *name = real_dev->name;
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if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
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pr_info("VLANs not supported on %s\n", name);
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return -EOPNOTSUPP;
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}
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if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL)
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return -EEXIST;
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return 0;
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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_priv *vlan = vlan_dev_priv(dev);
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struct net_device *real_dev = vlan->real_dev;
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u16 vlan_id = vlan->vlan_id;
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struct vlan_info *vlan_info;
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struct vlan_group *grp;
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int err;
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err = vlan_vid_add(real_dev, vlan->vlan_proto, vlan_id);
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if (err)
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return err;
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vlan_info = rtnl_dereference(real_dev->vlan_info);
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/* vlan_info should be there now. vlan_vid_add took care of it */
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BUG_ON(!vlan_info);
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grp = &vlan_info->grp;
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if (grp->nr_vlan_devs == 0) {
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err = vlan_gvrp_init_applicant(real_dev);
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if (err < 0)
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goto out_vid_del;
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err = vlan_mvrp_init_applicant(real_dev);
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if (err < 0)
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goto out_uninit_gvrp;
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}
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err = vlan_group_prealloc_vid(grp, vlan->vlan_proto, vlan_id);
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if (err < 0)
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goto out_uninit_mvrp;
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vlan->nest_level = dev_get_nest_level(real_dev) + 1;
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err = register_netdevice(dev);
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if (err < 0)
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goto out_uninit_mvrp;
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err = netdev_upper_dev_link(real_dev, dev);
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if (err)
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goto out_unregister_netdev;
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/* Account for reference in struct vlan_dev_priv */
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dev_hold(real_dev);
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netif_stacked_transfer_operstate(real_dev, dev);
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linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
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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->vlan_proto, vlan_id, dev);
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grp->nr_vlan_devs++;
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return 0;
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out_unregister_netdev:
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unregister_netdevice(dev);
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out_uninit_mvrp:
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if (grp->nr_vlan_devs == 0)
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vlan_mvrp_uninit_applicant(real_dev);
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out_uninit_gvrp:
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if (grp->nr_vlan_devs == 0)
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vlan_gvrp_uninit_applicant(real_dev);
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out_vid_del:
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vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id);
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return err;
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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, u16 vlan_id)
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{
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struct net_device *new_dev;
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struct vlan_dev_priv *vlan;
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struct net *net = dev_net(real_dev);
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struct vlan_net *vn = net_generic(net, vlan_net_id);
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char name[IFNAMSIZ];
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int err;
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if (vlan_id >= VLAN_VID_MASK)
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return -ERANGE;
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err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id);
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if (err < 0)
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return err;
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/* Gotta set up the fields for the device. */
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switch (vn->name_type) {
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case VLAN_NAME_TYPE_RAW_PLUS_VID:
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/* name will look like: eth1.0005 */
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snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
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break;
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case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
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/* Put our vlan.VID in the name.
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* Name will look like: vlan5
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*/
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snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
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break;
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case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
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/* Put our vlan.VID in the name.
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* Name will look like: eth0.5
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*/
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snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
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break;
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case VLAN_NAME_TYPE_PLUS_VID:
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/* Put our vlan.VID in the name.
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* Name will look like: vlan0005
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*/
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default:
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snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
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}
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new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name,
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NET_NAME_UNKNOWN, vlan_setup);
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if (new_dev == NULL)
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return -ENOBUFS;
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dev_net_set(new_dev, net);
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/* need 4 bytes for extra VLAN header info,
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* hope the underlying device can handle it.
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*/
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new_dev->mtu = real_dev->mtu;
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vlan = vlan_dev_priv(new_dev);
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vlan->vlan_proto = htons(ETH_P_8021Q);
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vlan->vlan_id = vlan_id;
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vlan->real_dev = real_dev;
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vlan->dent = NULL;
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vlan->flags = VLAN_FLAG_REORDER_HDR;
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new_dev->rtnl_link_ops = &vlan_link_ops;
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err = register_vlan_dev(new_dev);
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if (err < 0)
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goto out_free_newdev;
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return 0;
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out_free_newdev:
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free_netdev(new_dev);
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return err;
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}
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static void vlan_sync_address(struct net_device *dev,
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struct net_device *vlandev)
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{
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struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
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/* May be called without an actual change */
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if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr))
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return;
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/* vlan continues to inherit address of lower device */
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if (vlan_dev_inherit_address(vlandev, dev))
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goto out;
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/* vlan address was different from the old address and is equal to
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* the new address */
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if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
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ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
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dev_uc_del(dev, vlandev->dev_addr);
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/* vlan address was equal to the old address and is different from
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* the new address */
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if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
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!ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
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dev_uc_add(dev, vlandev->dev_addr);
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out:
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ether_addr_copy(vlan->real_dev_addr, dev->dev_addr);
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}
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static void vlan_transfer_features(struct net_device *dev,
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struct net_device *vlandev)
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{
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struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
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vlandev->gso_max_size = dev->gso_max_size;
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vlandev->gso_max_segs = dev->gso_max_segs;
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if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto))
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vlandev->hard_header_len = dev->hard_header_len;
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else
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vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
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#if IS_ENABLED(CONFIG_FCOE)
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vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
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#endif
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netdev_update_features(vlandev);
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}
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static int __vlan_device_event(struct net_device *dev, unsigned long event)
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{
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int err = 0;
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switch (event) {
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case NETDEV_CHANGENAME:
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vlan_proc_rem_dev(dev);
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err = vlan_proc_add_dev(dev);
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break;
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case NETDEV_REGISTER:
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err = vlan_proc_add_dev(dev);
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break;
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case NETDEV_UNREGISTER:
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vlan_proc_rem_dev(dev);
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break;
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}
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return err;
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}
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static int vlan_device_event(struct notifier_block *unused, unsigned long event,
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void *ptr)
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{
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struct net_device *dev = netdev_notifier_info_to_dev(ptr);
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struct vlan_group *grp;
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struct vlan_info *vlan_info;
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int i, flgs;
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struct net_device *vlandev;
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struct vlan_dev_priv *vlan;
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bool last = false;
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LIST_HEAD(list);
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if (is_vlan_dev(dev)) {
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int err = __vlan_device_event(dev, event);
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if (err)
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return notifier_from_errno(err);
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}
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if ((event == NETDEV_UP) &&
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(dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) {
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pr_info("adding VLAN 0 to HW filter on device %s\n",
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dev->name);
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vlan_vid_add(dev, htons(ETH_P_8021Q), 0);
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}
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vlan_info = rtnl_dereference(dev->vlan_info);
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if (!vlan_info)
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goto out;
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grp = &vlan_info->grp;
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/* It is OK that we do not hold the group lock right now,
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* as we run under the RTNL lock.
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*/
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switch (event) {
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case NETDEV_CHANGE:
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/* Propagate real device state to vlan devices */
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vlan_group_for_each_dev(grp, i, vlandev)
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netif_stacked_transfer_operstate(dev, vlandev);
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break;
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case NETDEV_CHANGEADDR:
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/* Adjust unicast filters on underlying device */
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vlan_group_for_each_dev(grp, i, vlandev) {
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flgs = vlandev->flags;
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if (!(flgs & IFF_UP))
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continue;
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vlan_sync_address(dev, vlandev);
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}
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break;
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case NETDEV_CHANGEMTU:
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vlan_group_for_each_dev(grp, i, vlandev) {
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if (vlandev->mtu <= dev->mtu)
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continue;
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dev_set_mtu(vlandev, dev->mtu);
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}
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break;
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case NETDEV_FEAT_CHANGE:
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/* Propagate device features to underlying device */
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vlan_group_for_each_dev(grp, i, vlandev)
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vlan_transfer_features(dev, vlandev);
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break;
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case NETDEV_DOWN: {
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struct net_device *tmp;
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LIST_HEAD(close_list);
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if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)
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vlan_vid_del(dev, htons(ETH_P_8021Q), 0);
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/* Put all VLANs for this dev in the down state too. */
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vlan_group_for_each_dev(grp, i, vlandev) {
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flgs = vlandev->flags;
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if (!(flgs & IFF_UP))
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continue;
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vlan = vlan_dev_priv(vlandev);
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if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
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list_add(&vlandev->close_list, &close_list);
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}
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dev_close_many(&close_list, false);
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list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) {
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netif_stacked_transfer_operstate(dev, vlandev);
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list_del_init(&vlandev->close_list);
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}
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list_del(&close_list);
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break;
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}
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case NETDEV_UP:
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/* Put all VLANs for this dev in the up state too. */
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vlan_group_for_each_dev(grp, i, vlandev) {
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flgs = dev_get_flags(vlandev);
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if (flgs & IFF_UP)
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continue;
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vlan = vlan_dev_priv(vlandev);
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if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
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dev_change_flags(vlandev, flgs | IFF_UP);
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netif_stacked_transfer_operstate(dev, vlandev);
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}
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break;
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case NETDEV_UNREGISTER:
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/* twiddle thumbs on netns device moves */
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if (dev->reg_state != NETREG_UNREGISTERING)
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break;
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vlan_group_for_each_dev(grp, i, vlandev) {
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/* removal of last vid destroys vlan_info, abort
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|
* 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;
|
|
}
|
|
|
|
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[23] = 0;
|
|
args.u.device2[23] = 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 >= 0) &&
|
|
(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 struct sk_buff **vlan_gro_receive(struct sk_buff **head,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct sk_buff *p, **pp = NULL;
|
|
struct vlan_hdr *vhdr;
|
|
unsigned int hlen, off_vlan;
|
|
const struct packet_offload *ptype;
|
|
__be16 type;
|
|
int flush = 1;
|
|
|
|
off_vlan = skb_gro_offset(skb);
|
|
hlen = off_vlan + sizeof(*vhdr);
|
|
vhdr = skb_gro_header_fast(skb, off_vlan);
|
|
if (skb_gro_header_hard(skb, hlen)) {
|
|
vhdr = skb_gro_header_slow(skb, hlen, off_vlan);
|
|
if (unlikely(!vhdr))
|
|
goto out;
|
|
}
|
|
|
|
type = vhdr->h_vlan_encapsulated_proto;
|
|
|
|
rcu_read_lock();
|
|
ptype = gro_find_receive_by_type(type);
|
|
if (!ptype)
|
|
goto out_unlock;
|
|
|
|
flush = 0;
|
|
|
|
for (p = *head; p; p = p->next) {
|
|
struct vlan_hdr *vhdr2;
|
|
|
|
if (!NAPI_GRO_CB(p)->same_flow)
|
|
continue;
|
|
|
|
vhdr2 = (struct vlan_hdr *)(p->data + off_vlan);
|
|
if (compare_vlan_header(vhdr, vhdr2))
|
|
NAPI_GRO_CB(p)->same_flow = 0;
|
|
}
|
|
|
|
skb_gro_pull(skb, sizeof(*vhdr));
|
|
skb_gro_postpull_rcsum(skb, vhdr, sizeof(*vhdr));
|
|
pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb);
|
|
|
|
out_unlock:
|
|
rcu_read_unlock();
|
|
out:
|
|
NAPI_GRO_CB(skb)->flush |= flush;
|
|
|
|
return pp;
|
|
}
|
|
|
|
static int vlan_gro_complete(struct sk_buff *skb, int nhoff)
|
|
{
|
|
struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data + nhoff);
|
|
__be16 type = vhdr->h_vlan_encapsulated_proto;
|
|
struct packet_offload *ptype;
|
|
int err = -ENOENT;
|
|
|
|
rcu_read_lock();
|
|
ptype = gro_find_complete_by_type(type);
|
|
if (ptype)
|
|
err = ptype->callbacks.gro_complete(skb, nhoff + sizeof(*vhdr));
|
|
|
|
rcu_read_unlock();
|
|
return err;
|
|
}
|
|
|
|
static struct packet_offload vlan_packet_offloads[] __read_mostly = {
|
|
{
|
|
.type = cpu_to_be16(ETH_P_8021Q),
|
|
.priority = 10,
|
|
.callbacks = {
|
|
.gro_receive = vlan_gro_receive,
|
|
.gro_complete = vlan_gro_complete,
|
|
},
|
|
},
|
|
{
|
|
.type = cpu_to_be16(ETH_P_8021AD),
|
|
.priority = 10,
|
|
.callbacks = {
|
|
.gro_receive = vlan_gro_receive,
|
|
.gro_complete = vlan_gro_complete,
|
|
},
|
|
},
|
|
};
|
|
|
|
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;
|
|
unsigned int i;
|
|
|
|
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;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++)
|
|
dev_add_offload(&vlan_packet_offloads[i]);
|
|
|
|
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)
|
|
{
|
|
unsigned int i;
|
|
|
|
vlan_ioctl_set(NULL);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++)
|
|
dev_remove_offload(&vlan_packet_offloads[i]);
|
|
|
|
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);
|