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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
![David S. Miller](/assets/img/avatar_default.png)
net/sched/cls_api.c has overlapping changes to a call to nlmsg_parse(), one (from 'net') added rtm_tca_policy instead of NULL to the 5th argument, and another (from 'net-next') added cb->extack instead of NULL to the 6th argument. net/ipv4/ipmr_base.c is a case of a bug fix in 'net' being done to code which moved (to mr_table_dump)) in 'net-next'. Thanks to David Ahern for the heads up. Signed-off-by: David S. Miller <davem@davemloft.net>
975 lines
21 KiB
C
975 lines
21 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* XFRM virtual interface
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*
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* Copyright (C) 2018 secunet Security Networks AG
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*
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* Author:
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* Steffen Klassert <steffen.klassert@secunet.com>
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*/
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#include <linux/module.h>
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#include <linux/capability.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/sockios.h>
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#include <linux/icmp.h>
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#include <linux/if.h>
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#include <linux/in.h>
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#include <linux/ip.h>
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#include <linux/net.h>
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#include <linux/in6.h>
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#include <linux/netdevice.h>
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#include <linux/if_link.h>
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#include <linux/if_arp.h>
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#include <linux/icmpv6.h>
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#include <linux/init.h>
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#include <linux/route.h>
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#include <linux/rtnetlink.h>
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#include <linux/netfilter_ipv6.h>
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#include <linux/slab.h>
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#include <linux/hash.h>
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#include <linux/uaccess.h>
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#include <linux/atomic.h>
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#include <net/icmp.h>
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#include <net/ip.h>
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#include <net/ipv6.h>
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#include <net/ip6_route.h>
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#include <net/addrconf.h>
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#include <net/xfrm.h>
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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#include <linux/etherdevice.h>
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static int xfrmi_dev_init(struct net_device *dev);
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static void xfrmi_dev_setup(struct net_device *dev);
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static struct rtnl_link_ops xfrmi_link_ops __read_mostly;
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static unsigned int xfrmi_net_id __read_mostly;
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struct xfrmi_net {
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/* lists for storing interfaces in use */
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struct xfrm_if __rcu *xfrmi[1];
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};
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#define for_each_xfrmi_rcu(start, xi) \
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for (xi = rcu_dereference(start); xi; xi = rcu_dereference(xi->next))
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static struct xfrm_if *xfrmi_lookup(struct net *net, struct xfrm_state *x)
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{
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struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
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struct xfrm_if *xi;
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for_each_xfrmi_rcu(xfrmn->xfrmi[0], xi) {
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if (x->if_id == xi->p.if_id &&
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(xi->dev->flags & IFF_UP))
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return xi;
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}
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return NULL;
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}
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static struct xfrm_if *xfrmi_decode_session(struct sk_buff *skb)
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{
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struct xfrmi_net *xfrmn;
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int ifindex;
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struct xfrm_if *xi;
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if (!skb->dev)
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return NULL;
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xfrmn = net_generic(dev_net(skb->dev), xfrmi_net_id);
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ifindex = skb->dev->ifindex;
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for_each_xfrmi_rcu(xfrmn->xfrmi[0], xi) {
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if (ifindex == xi->dev->ifindex &&
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(xi->dev->flags & IFF_UP))
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return xi;
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}
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return NULL;
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}
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static void xfrmi_link(struct xfrmi_net *xfrmn, struct xfrm_if *xi)
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{
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struct xfrm_if __rcu **xip = &xfrmn->xfrmi[0];
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rcu_assign_pointer(xi->next , rtnl_dereference(*xip));
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rcu_assign_pointer(*xip, xi);
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}
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static void xfrmi_unlink(struct xfrmi_net *xfrmn, struct xfrm_if *xi)
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{
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struct xfrm_if __rcu **xip;
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struct xfrm_if *iter;
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for (xip = &xfrmn->xfrmi[0];
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(iter = rtnl_dereference(*xip)) != NULL;
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xip = &iter->next) {
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if (xi == iter) {
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rcu_assign_pointer(*xip, xi->next);
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break;
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}
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}
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}
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static void xfrmi_dev_free(struct net_device *dev)
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{
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struct xfrm_if *xi = netdev_priv(dev);
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gro_cells_destroy(&xi->gro_cells);
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free_percpu(dev->tstats);
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}
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static int xfrmi_create2(struct net_device *dev)
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{
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struct xfrm_if *xi = netdev_priv(dev);
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struct net *net = dev_net(dev);
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struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
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int err;
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dev->rtnl_link_ops = &xfrmi_link_ops;
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err = register_netdevice(dev);
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if (err < 0)
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goto out;
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strcpy(xi->p.name, dev->name);
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dev_hold(dev);
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xfrmi_link(xfrmn, xi);
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return 0;
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out:
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return err;
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}
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static struct xfrm_if *xfrmi_create(struct net *net, struct xfrm_if_parms *p)
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{
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struct net_device *dev;
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struct xfrm_if *xi;
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char name[IFNAMSIZ];
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int err;
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if (p->name[0]) {
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strlcpy(name, p->name, IFNAMSIZ);
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} else {
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err = -EINVAL;
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goto failed;
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}
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dev = alloc_netdev(sizeof(*xi), name, NET_NAME_UNKNOWN, xfrmi_dev_setup);
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if (!dev) {
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err = -EAGAIN;
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goto failed;
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}
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dev_net_set(dev, net);
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xi = netdev_priv(dev);
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xi->p = *p;
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xi->net = net;
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xi->dev = dev;
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xi->phydev = dev_get_by_index(net, p->link);
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if (!xi->phydev) {
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err = -ENODEV;
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goto failed_free;
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}
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err = xfrmi_create2(dev);
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if (err < 0)
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goto failed_dev_put;
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return xi;
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failed_dev_put:
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dev_put(xi->phydev);
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failed_free:
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free_netdev(dev);
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failed:
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return ERR_PTR(err);
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}
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static struct xfrm_if *xfrmi_locate(struct net *net, struct xfrm_if_parms *p,
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int create)
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{
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struct xfrm_if __rcu **xip;
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struct xfrm_if *xi;
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struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
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for (xip = &xfrmn->xfrmi[0];
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(xi = rtnl_dereference(*xip)) != NULL;
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xip = &xi->next) {
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if (xi->p.if_id == p->if_id) {
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if (create)
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return ERR_PTR(-EEXIST);
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return xi;
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}
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}
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if (!create)
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return ERR_PTR(-ENODEV);
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return xfrmi_create(net, p);
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}
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static void xfrmi_dev_uninit(struct net_device *dev)
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{
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struct xfrm_if *xi = netdev_priv(dev);
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struct xfrmi_net *xfrmn = net_generic(xi->net, xfrmi_net_id);
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xfrmi_unlink(xfrmn, xi);
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dev_put(xi->phydev);
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dev_put(dev);
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}
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static void xfrmi_scrub_packet(struct sk_buff *skb, bool xnet)
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{
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skb->tstamp = 0;
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skb->pkt_type = PACKET_HOST;
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skb->skb_iif = 0;
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skb->ignore_df = 0;
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skb_dst_drop(skb);
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nf_reset(skb);
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nf_reset_trace(skb);
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if (!xnet)
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return;
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ipvs_reset(skb);
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secpath_reset(skb);
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skb_orphan(skb);
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skb->mark = 0;
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}
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static int xfrmi_rcv_cb(struct sk_buff *skb, int err)
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{
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struct pcpu_sw_netstats *tstats;
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struct xfrm_mode *inner_mode;
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struct net_device *dev;
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struct xfrm_state *x;
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struct xfrm_if *xi;
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bool xnet;
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if (err && !skb->sp)
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return 0;
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x = xfrm_input_state(skb);
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xi = xfrmi_lookup(xs_net(x), x);
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if (!xi)
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return 1;
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dev = xi->dev;
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skb->dev = dev;
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if (err) {
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dev->stats.rx_errors++;
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dev->stats.rx_dropped++;
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return 0;
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}
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xnet = !net_eq(xi->net, dev_net(skb->dev));
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if (xnet) {
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inner_mode = x->inner_mode;
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if (x->sel.family == AF_UNSPEC) {
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inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol);
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if (inner_mode == NULL) {
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XFRM_INC_STATS(dev_net(skb->dev),
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LINUX_MIB_XFRMINSTATEMODEERROR);
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return -EINVAL;
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}
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}
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if (!xfrm_policy_check(NULL, XFRM_POLICY_IN, skb,
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inner_mode->afinfo->family))
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return -EPERM;
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}
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xfrmi_scrub_packet(skb, xnet);
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tstats = this_cpu_ptr(dev->tstats);
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u64_stats_update_begin(&tstats->syncp);
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tstats->rx_packets++;
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tstats->rx_bytes += skb->len;
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u64_stats_update_end(&tstats->syncp);
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return 0;
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}
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static int
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xfrmi_xmit2(struct sk_buff *skb, struct net_device *dev, struct flowi *fl)
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{
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struct xfrm_if *xi = netdev_priv(dev);
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struct net_device_stats *stats = &xi->dev->stats;
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struct dst_entry *dst = skb_dst(skb);
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unsigned int length = skb->len;
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struct net_device *tdev;
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struct xfrm_state *x;
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int err = -1;
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int mtu;
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if (!dst)
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goto tx_err_link_failure;
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dst_hold(dst);
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dst = xfrm_lookup_with_ifid(xi->net, dst, fl, NULL, 0, xi->p.if_id);
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if (IS_ERR(dst)) {
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err = PTR_ERR(dst);
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dst = NULL;
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goto tx_err_link_failure;
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}
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x = dst->xfrm;
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if (!x)
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goto tx_err_link_failure;
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if (x->if_id != xi->p.if_id)
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goto tx_err_link_failure;
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tdev = dst->dev;
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if (tdev == dev) {
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stats->collisions++;
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net_warn_ratelimited("%s: Local routing loop detected!\n",
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xi->p.name);
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goto tx_err_dst_release;
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}
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mtu = dst_mtu(dst);
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if (!skb->ignore_df && skb->len > mtu) {
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skb_dst_update_pmtu(skb, mtu);
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if (skb->protocol == htons(ETH_P_IPV6)) {
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if (mtu < IPV6_MIN_MTU)
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mtu = IPV6_MIN_MTU;
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icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
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} else {
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icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
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htonl(mtu));
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}
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dst_release(dst);
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return -EMSGSIZE;
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}
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xfrmi_scrub_packet(skb, !net_eq(xi->net, dev_net(dev)));
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skb_dst_set(skb, dst);
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skb->dev = tdev;
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err = dst_output(xi->net, skb->sk, skb);
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if (net_xmit_eval(err) == 0) {
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struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
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u64_stats_update_begin(&tstats->syncp);
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tstats->tx_bytes += length;
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tstats->tx_packets++;
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u64_stats_update_end(&tstats->syncp);
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} else {
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stats->tx_errors++;
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stats->tx_aborted_errors++;
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}
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return 0;
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tx_err_link_failure:
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stats->tx_carrier_errors++;
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dst_link_failure(skb);
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tx_err_dst_release:
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dst_release(dst);
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return err;
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}
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static netdev_tx_t xfrmi_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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struct xfrm_if *xi = netdev_priv(dev);
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struct net_device_stats *stats = &xi->dev->stats;
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struct flowi fl;
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int ret;
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memset(&fl, 0, sizeof(fl));
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switch (skb->protocol) {
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case htons(ETH_P_IPV6):
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xfrm_decode_session(skb, &fl, AF_INET6);
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memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));
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break;
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case htons(ETH_P_IP):
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xfrm_decode_session(skb, &fl, AF_INET);
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memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
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break;
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default:
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goto tx_err;
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}
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fl.flowi_oif = xi->phydev->ifindex;
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ret = xfrmi_xmit2(skb, dev, &fl);
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if (ret < 0)
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goto tx_err;
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|
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return NETDEV_TX_OK;
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|
|
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tx_err:
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stats->tx_errors++;
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stats->tx_dropped++;
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kfree_skb(skb);
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return NETDEV_TX_OK;
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}
|
|
|
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static int xfrmi4_err(struct sk_buff *skb, u32 info)
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{
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const struct iphdr *iph = (const struct iphdr *)skb->data;
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struct net *net = dev_net(skb->dev);
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int protocol = iph->protocol;
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struct ip_comp_hdr *ipch;
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struct ip_esp_hdr *esph;
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struct ip_auth_hdr *ah ;
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struct xfrm_state *x;
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struct xfrm_if *xi;
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__be32 spi;
|
|
|
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switch (protocol) {
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|
case IPPROTO_ESP:
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esph = (struct ip_esp_hdr *)(skb->data+(iph->ihl<<2));
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spi = esph->spi;
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break;
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case IPPROTO_AH:
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ah = (struct ip_auth_hdr *)(skb->data+(iph->ihl<<2));
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spi = ah->spi;
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break;
|
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case IPPROTO_COMP:
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ipch = (struct ip_comp_hdr *)(skb->data+(iph->ihl<<2));
|
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spi = htonl(ntohs(ipch->cpi));
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break;
|
|
default:
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|
return 0;
|
|
}
|
|
|
|
switch (icmp_hdr(skb)->type) {
|
|
case ICMP_DEST_UNREACH:
|
|
if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
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|
return 0;
|
|
case ICMP_REDIRECT:
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
|
|
spi, protocol, AF_INET);
|
|
if (!x)
|
|
return 0;
|
|
|
|
xi = xfrmi_lookup(net, x);
|
|
if (!xi) {
|
|
xfrm_state_put(x);
|
|
return -1;
|
|
}
|
|
|
|
if (icmp_hdr(skb)->type == ICMP_DEST_UNREACH)
|
|
ipv4_update_pmtu(skb, net, info, 0, protocol);
|
|
else
|
|
ipv4_redirect(skb, net, 0, protocol);
|
|
xfrm_state_put(x);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xfrmi6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
|
|
u8 type, u8 code, int offset, __be32 info)
|
|
{
|
|
const struct ipv6hdr *iph = (const struct ipv6hdr *)skb->data;
|
|
struct net *net = dev_net(skb->dev);
|
|
int protocol = iph->nexthdr;
|
|
struct ip_comp_hdr *ipch;
|
|
struct ip_esp_hdr *esph;
|
|
struct ip_auth_hdr *ah;
|
|
struct xfrm_state *x;
|
|
struct xfrm_if *xi;
|
|
__be32 spi;
|
|
|
|
switch (protocol) {
|
|
case IPPROTO_ESP:
|
|
esph = (struct ip_esp_hdr *)(skb->data + offset);
|
|
spi = esph->spi;
|
|
break;
|
|
case IPPROTO_AH:
|
|
ah = (struct ip_auth_hdr *)(skb->data + offset);
|
|
spi = ah->spi;
|
|
break;
|
|
case IPPROTO_COMP:
|
|
ipch = (struct ip_comp_hdr *)(skb->data + offset);
|
|
spi = htonl(ntohs(ipch->cpi));
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
if (type != ICMPV6_PKT_TOOBIG &&
|
|
type != NDISC_REDIRECT)
|
|
return 0;
|
|
|
|
x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
|
|
spi, protocol, AF_INET6);
|
|
if (!x)
|
|
return 0;
|
|
|
|
xi = xfrmi_lookup(net, x);
|
|
if (!xi) {
|
|
xfrm_state_put(x);
|
|
return -1;
|
|
}
|
|
|
|
if (type == NDISC_REDIRECT)
|
|
ip6_redirect(skb, net, skb->dev->ifindex, 0,
|
|
sock_net_uid(net, NULL));
|
|
else
|
|
ip6_update_pmtu(skb, net, info, 0, 0, sock_net_uid(net, NULL));
|
|
xfrm_state_put(x);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xfrmi_change(struct xfrm_if *xi, const struct xfrm_if_parms *p)
|
|
{
|
|
if (xi->p.link != p->link)
|
|
return -EINVAL;
|
|
|
|
xi->p.if_id = p->if_id;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xfrmi_update(struct xfrm_if *xi, struct xfrm_if_parms *p)
|
|
{
|
|
struct net *net = dev_net(xi->dev);
|
|
struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
|
|
int err;
|
|
|
|
xfrmi_unlink(xfrmn, xi);
|
|
synchronize_net();
|
|
err = xfrmi_change(xi, p);
|
|
xfrmi_link(xfrmn, xi);
|
|
netdev_state_change(xi->dev);
|
|
return err;
|
|
}
|
|
|
|
static void xfrmi_get_stats64(struct net_device *dev,
|
|
struct rtnl_link_stats64 *s)
|
|
{
|
|
int cpu;
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
struct pcpu_sw_netstats *stats;
|
|
struct pcpu_sw_netstats tmp;
|
|
int start;
|
|
|
|
stats = per_cpu_ptr(dev->tstats, cpu);
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&stats->syncp);
|
|
tmp.rx_packets = stats->rx_packets;
|
|
tmp.rx_bytes = stats->rx_bytes;
|
|
tmp.tx_packets = stats->tx_packets;
|
|
tmp.tx_bytes = stats->tx_bytes;
|
|
} while (u64_stats_fetch_retry_irq(&stats->syncp, start));
|
|
|
|
s->rx_packets += tmp.rx_packets;
|
|
s->rx_bytes += tmp.rx_bytes;
|
|
s->tx_packets += tmp.tx_packets;
|
|
s->tx_bytes += tmp.tx_bytes;
|
|
}
|
|
|
|
s->rx_dropped = dev->stats.rx_dropped;
|
|
s->tx_dropped = dev->stats.tx_dropped;
|
|
}
|
|
|
|
static int xfrmi_get_iflink(const struct net_device *dev)
|
|
{
|
|
struct xfrm_if *xi = netdev_priv(dev);
|
|
|
|
return xi->phydev->ifindex;
|
|
}
|
|
|
|
|
|
static const struct net_device_ops xfrmi_netdev_ops = {
|
|
.ndo_init = xfrmi_dev_init,
|
|
.ndo_uninit = xfrmi_dev_uninit,
|
|
.ndo_start_xmit = xfrmi_xmit,
|
|
.ndo_get_stats64 = xfrmi_get_stats64,
|
|
.ndo_get_iflink = xfrmi_get_iflink,
|
|
};
|
|
|
|
static void xfrmi_dev_setup(struct net_device *dev)
|
|
{
|
|
dev->netdev_ops = &xfrmi_netdev_ops;
|
|
dev->type = ARPHRD_NONE;
|
|
dev->hard_header_len = ETH_HLEN;
|
|
dev->min_header_len = ETH_HLEN;
|
|
dev->mtu = ETH_DATA_LEN;
|
|
dev->min_mtu = ETH_MIN_MTU;
|
|
dev->max_mtu = ETH_DATA_LEN;
|
|
dev->addr_len = ETH_ALEN;
|
|
dev->flags = IFF_NOARP;
|
|
dev->needs_free_netdev = true;
|
|
dev->priv_destructor = xfrmi_dev_free;
|
|
netif_keep_dst(dev);
|
|
}
|
|
|
|
static int xfrmi_dev_init(struct net_device *dev)
|
|
{
|
|
struct xfrm_if *xi = netdev_priv(dev);
|
|
struct net_device *phydev = xi->phydev;
|
|
int err;
|
|
|
|
dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
|
|
if (!dev->tstats)
|
|
return -ENOMEM;
|
|
|
|
err = gro_cells_init(&xi->gro_cells, dev);
|
|
if (err) {
|
|
free_percpu(dev->tstats);
|
|
return err;
|
|
}
|
|
|
|
dev->features |= NETIF_F_LLTX;
|
|
|
|
dev->needed_headroom = phydev->needed_headroom;
|
|
dev->needed_tailroom = phydev->needed_tailroom;
|
|
|
|
if (is_zero_ether_addr(dev->dev_addr))
|
|
eth_hw_addr_inherit(dev, phydev);
|
|
if (is_zero_ether_addr(dev->broadcast))
|
|
memcpy(dev->broadcast, phydev->broadcast, dev->addr_len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xfrmi_validate(struct nlattr *tb[], struct nlattr *data[],
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void xfrmi_netlink_parms(struct nlattr *data[],
|
|
struct xfrm_if_parms *parms)
|
|
{
|
|
memset(parms, 0, sizeof(*parms));
|
|
|
|
if (!data)
|
|
return;
|
|
|
|
if (data[IFLA_XFRM_LINK])
|
|
parms->link = nla_get_u32(data[IFLA_XFRM_LINK]);
|
|
|
|
if (data[IFLA_XFRM_IF_ID])
|
|
parms->if_id = nla_get_u32(data[IFLA_XFRM_IF_ID]);
|
|
}
|
|
|
|
static int xfrmi_newlink(struct net *src_net, struct net_device *dev,
|
|
struct nlattr *tb[], struct nlattr *data[],
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net *net = dev_net(dev);
|
|
struct xfrm_if_parms *p;
|
|
struct xfrm_if *xi;
|
|
|
|
xi = netdev_priv(dev);
|
|
p = &xi->p;
|
|
|
|
xfrmi_netlink_parms(data, p);
|
|
|
|
if (!tb[IFLA_IFNAME])
|
|
return -EINVAL;
|
|
|
|
nla_strlcpy(p->name, tb[IFLA_IFNAME], IFNAMSIZ);
|
|
|
|
xi = xfrmi_locate(net, p, 1);
|
|
return PTR_ERR_OR_ZERO(xi);
|
|
}
|
|
|
|
static void xfrmi_dellink(struct net_device *dev, struct list_head *head)
|
|
{
|
|
unregister_netdevice_queue(dev, head);
|
|
}
|
|
|
|
static int xfrmi_changelink(struct net_device *dev, struct nlattr *tb[],
|
|
struct nlattr *data[],
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct xfrm_if *xi = netdev_priv(dev);
|
|
struct net *net = dev_net(dev);
|
|
|
|
xfrmi_netlink_parms(data, &xi->p);
|
|
|
|
xi = xfrmi_locate(net, &xi->p, 0);
|
|
|
|
if (IS_ERR_OR_NULL(xi)) {
|
|
xi = netdev_priv(dev);
|
|
} else {
|
|
if (xi->dev != dev)
|
|
return -EEXIST;
|
|
}
|
|
|
|
return xfrmi_update(xi, &xi->p);
|
|
}
|
|
|
|
static size_t xfrmi_get_size(const struct net_device *dev)
|
|
{
|
|
return
|
|
/* IFLA_XFRM_LINK */
|
|
nla_total_size(4) +
|
|
/* IFLA_XFRM_IF_ID */
|
|
nla_total_size(4) +
|
|
0;
|
|
}
|
|
|
|
static int xfrmi_fill_info(struct sk_buff *skb, const struct net_device *dev)
|
|
{
|
|
struct xfrm_if *xi = netdev_priv(dev);
|
|
struct xfrm_if_parms *parm = &xi->p;
|
|
|
|
if (nla_put_u32(skb, IFLA_XFRM_LINK, parm->link) ||
|
|
nla_put_u32(skb, IFLA_XFRM_IF_ID, parm->if_id))
|
|
goto nla_put_failure;
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static struct net *xfrmi_get_link_net(const struct net_device *dev)
|
|
{
|
|
struct xfrm_if *xi = netdev_priv(dev);
|
|
|
|
return dev_net(xi->phydev);
|
|
}
|
|
|
|
static const struct nla_policy xfrmi_policy[IFLA_XFRM_MAX + 1] = {
|
|
[IFLA_XFRM_LINK] = { .type = NLA_U32 },
|
|
[IFLA_XFRM_IF_ID] = { .type = NLA_U32 },
|
|
};
|
|
|
|
static struct rtnl_link_ops xfrmi_link_ops __read_mostly = {
|
|
.kind = "xfrm",
|
|
.maxtype = IFLA_XFRM_MAX,
|
|
.policy = xfrmi_policy,
|
|
.priv_size = sizeof(struct xfrm_if),
|
|
.setup = xfrmi_dev_setup,
|
|
.validate = xfrmi_validate,
|
|
.newlink = xfrmi_newlink,
|
|
.dellink = xfrmi_dellink,
|
|
.changelink = xfrmi_changelink,
|
|
.get_size = xfrmi_get_size,
|
|
.fill_info = xfrmi_fill_info,
|
|
.get_link_net = xfrmi_get_link_net,
|
|
};
|
|
|
|
static void __net_exit xfrmi_destroy_interfaces(struct xfrmi_net *xfrmn)
|
|
{
|
|
struct xfrm_if *xi;
|
|
LIST_HEAD(list);
|
|
|
|
xi = rtnl_dereference(xfrmn->xfrmi[0]);
|
|
if (!xi)
|
|
return;
|
|
|
|
unregister_netdevice_queue(xi->dev, &list);
|
|
unregister_netdevice_many(&list);
|
|
}
|
|
|
|
static int __net_init xfrmi_init_net(struct net *net)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void __net_exit xfrmi_exit_net(struct net *net)
|
|
{
|
|
struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
|
|
|
|
rtnl_lock();
|
|
xfrmi_destroy_interfaces(xfrmn);
|
|
rtnl_unlock();
|
|
}
|
|
|
|
static struct pernet_operations xfrmi_net_ops = {
|
|
.init = xfrmi_init_net,
|
|
.exit = xfrmi_exit_net,
|
|
.id = &xfrmi_net_id,
|
|
.size = sizeof(struct xfrmi_net),
|
|
};
|
|
|
|
static struct xfrm6_protocol xfrmi_esp6_protocol __read_mostly = {
|
|
.handler = xfrm6_rcv,
|
|
.cb_handler = xfrmi_rcv_cb,
|
|
.err_handler = xfrmi6_err,
|
|
.priority = 10,
|
|
};
|
|
|
|
static struct xfrm6_protocol xfrmi_ah6_protocol __read_mostly = {
|
|
.handler = xfrm6_rcv,
|
|
.cb_handler = xfrmi_rcv_cb,
|
|
.err_handler = xfrmi6_err,
|
|
.priority = 10,
|
|
};
|
|
|
|
static struct xfrm6_protocol xfrmi_ipcomp6_protocol __read_mostly = {
|
|
.handler = xfrm6_rcv,
|
|
.cb_handler = xfrmi_rcv_cb,
|
|
.err_handler = xfrmi6_err,
|
|
.priority = 10,
|
|
};
|
|
|
|
static struct xfrm4_protocol xfrmi_esp4_protocol __read_mostly = {
|
|
.handler = xfrm4_rcv,
|
|
.input_handler = xfrm_input,
|
|
.cb_handler = xfrmi_rcv_cb,
|
|
.err_handler = xfrmi4_err,
|
|
.priority = 10,
|
|
};
|
|
|
|
static struct xfrm4_protocol xfrmi_ah4_protocol __read_mostly = {
|
|
.handler = xfrm4_rcv,
|
|
.input_handler = xfrm_input,
|
|
.cb_handler = xfrmi_rcv_cb,
|
|
.err_handler = xfrmi4_err,
|
|
.priority = 10,
|
|
};
|
|
|
|
static struct xfrm4_protocol xfrmi_ipcomp4_protocol __read_mostly = {
|
|
.handler = xfrm4_rcv,
|
|
.input_handler = xfrm_input,
|
|
.cb_handler = xfrmi_rcv_cb,
|
|
.err_handler = xfrmi4_err,
|
|
.priority = 10,
|
|
};
|
|
|
|
static int __init xfrmi4_init(void)
|
|
{
|
|
int err;
|
|
|
|
err = xfrm4_protocol_register(&xfrmi_esp4_protocol, IPPROTO_ESP);
|
|
if (err < 0)
|
|
goto xfrm_proto_esp_failed;
|
|
err = xfrm4_protocol_register(&xfrmi_ah4_protocol, IPPROTO_AH);
|
|
if (err < 0)
|
|
goto xfrm_proto_ah_failed;
|
|
err = xfrm4_protocol_register(&xfrmi_ipcomp4_protocol, IPPROTO_COMP);
|
|
if (err < 0)
|
|
goto xfrm_proto_comp_failed;
|
|
|
|
return 0;
|
|
|
|
xfrm_proto_comp_failed:
|
|
xfrm4_protocol_deregister(&xfrmi_ah4_protocol, IPPROTO_AH);
|
|
xfrm_proto_ah_failed:
|
|
xfrm4_protocol_deregister(&xfrmi_esp4_protocol, IPPROTO_ESP);
|
|
xfrm_proto_esp_failed:
|
|
return err;
|
|
}
|
|
|
|
static void xfrmi4_fini(void)
|
|
{
|
|
xfrm4_protocol_deregister(&xfrmi_ipcomp4_protocol, IPPROTO_COMP);
|
|
xfrm4_protocol_deregister(&xfrmi_ah4_protocol, IPPROTO_AH);
|
|
xfrm4_protocol_deregister(&xfrmi_esp4_protocol, IPPROTO_ESP);
|
|
}
|
|
|
|
static int __init xfrmi6_init(void)
|
|
{
|
|
int err;
|
|
|
|
err = xfrm6_protocol_register(&xfrmi_esp6_protocol, IPPROTO_ESP);
|
|
if (err < 0)
|
|
goto xfrm_proto_esp_failed;
|
|
err = xfrm6_protocol_register(&xfrmi_ah6_protocol, IPPROTO_AH);
|
|
if (err < 0)
|
|
goto xfrm_proto_ah_failed;
|
|
err = xfrm6_protocol_register(&xfrmi_ipcomp6_protocol, IPPROTO_COMP);
|
|
if (err < 0)
|
|
goto xfrm_proto_comp_failed;
|
|
|
|
return 0;
|
|
|
|
xfrm_proto_comp_failed:
|
|
xfrm6_protocol_deregister(&xfrmi_ah6_protocol, IPPROTO_AH);
|
|
xfrm_proto_ah_failed:
|
|
xfrm6_protocol_deregister(&xfrmi_esp6_protocol, IPPROTO_ESP);
|
|
xfrm_proto_esp_failed:
|
|
return err;
|
|
}
|
|
|
|
static void xfrmi6_fini(void)
|
|
{
|
|
xfrm6_protocol_deregister(&xfrmi_ipcomp6_protocol, IPPROTO_COMP);
|
|
xfrm6_protocol_deregister(&xfrmi_ah6_protocol, IPPROTO_AH);
|
|
xfrm6_protocol_deregister(&xfrmi_esp6_protocol, IPPROTO_ESP);
|
|
}
|
|
|
|
static const struct xfrm_if_cb xfrm_if_cb = {
|
|
.decode_session = xfrmi_decode_session,
|
|
};
|
|
|
|
static int __init xfrmi_init(void)
|
|
{
|
|
const char *msg;
|
|
int err;
|
|
|
|
pr_info("IPsec XFRM device driver\n");
|
|
|
|
msg = "tunnel device";
|
|
err = register_pernet_device(&xfrmi_net_ops);
|
|
if (err < 0)
|
|
goto pernet_dev_failed;
|
|
|
|
msg = "xfrm4 protocols";
|
|
err = xfrmi4_init();
|
|
if (err < 0)
|
|
goto xfrmi4_failed;
|
|
|
|
msg = "xfrm6 protocols";
|
|
err = xfrmi6_init();
|
|
if (err < 0)
|
|
goto xfrmi6_failed;
|
|
|
|
|
|
msg = "netlink interface";
|
|
err = rtnl_link_register(&xfrmi_link_ops);
|
|
if (err < 0)
|
|
goto rtnl_link_failed;
|
|
|
|
xfrm_if_register_cb(&xfrm_if_cb);
|
|
|
|
return err;
|
|
|
|
rtnl_link_failed:
|
|
xfrmi6_fini();
|
|
xfrmi6_failed:
|
|
xfrmi4_fini();
|
|
xfrmi4_failed:
|
|
unregister_pernet_device(&xfrmi_net_ops);
|
|
pernet_dev_failed:
|
|
pr_err("xfrmi init: failed to register %s\n", msg);
|
|
return err;
|
|
}
|
|
|
|
static void __exit xfrmi_fini(void)
|
|
{
|
|
xfrm_if_unregister_cb();
|
|
rtnl_link_unregister(&xfrmi_link_ops);
|
|
xfrmi4_fini();
|
|
xfrmi6_fini();
|
|
unregister_pernet_device(&xfrmi_net_ops);
|
|
}
|
|
|
|
module_init(xfrmi_init);
|
|
module_exit(xfrmi_fini);
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS_RTNL_LINK("xfrm");
|
|
MODULE_ALIAS_NETDEV("xfrm0");
|
|
MODULE_AUTHOR("Steffen Klassert");
|
|
MODULE_DESCRIPTION("XFRM virtual interface");
|