forked from luck/tmp_suning_uos_patched
c7d03a00b5
Make struct pernet_operations::id unsigned. There are 2 reasons to do so: 1) This field is really an index into an zero based array and thus is unsigned entity. Using negative value is out-of-bound access by definition. 2) On x86_64 unsigned 32-bit data which are mixed with pointers via array indexing or offsets added or subtracted to pointers are preffered to signed 32-bit data. "int" being used as an array index needs to be sign-extended to 64-bit before being used. void f(long *p, int i) { g(p[i]); } roughly translates to movsx rsi, esi mov rdi, [rsi+...] call g MOVSX is 3 byte instruction which isn't necessary if the variable is unsigned because x86_64 is zero extending by default. Now, there is net_generic() function which, you guessed it right, uses "int" as an array index: static inline void *net_generic(const struct net *net, int id) { ... ptr = ng->ptr[id - 1]; ... } And this function is used a lot, so those sign extensions add up. Patch snipes ~1730 bytes on allyesconfig kernel (without all junk messing with code generation): add/remove: 0/0 grow/shrink: 70/598 up/down: 396/-2126 (-1730) Unfortunately some functions actually grow bigger. This is a semmingly random artefact of code generation with register allocator being used differently. gcc decides that some variable needs to live in new r8+ registers and every access now requires REX prefix. Or it is shifted into r12, so [r12+0] addressing mode has to be used which is longer than [r8] However, overall balance is in negative direction: add/remove: 0/0 grow/shrink: 70/598 up/down: 396/-2126 (-1730) function old new delta nfsd4_lock 3886 3959 +73 tipc_link_build_proto_msg 1096 1140 +44 mac80211_hwsim_new_radio 2776 2808 +32 tipc_mon_rcv 1032 1058 +26 svcauth_gss_legacy_init 1413 1429 +16 tipc_bcbase_select_primary 379 392 +13 nfsd4_exchange_id 1247 1260 +13 nfsd4_setclientid_confirm 782 793 +11 ... put_client_renew_locked 494 480 -14 ip_set_sockfn_get 730 716 -14 geneve_sock_add 829 813 -16 nfsd4_sequence_done 721 703 -18 nlmclnt_lookup_host 708 686 -22 nfsd4_lockt 1085 1063 -22 nfs_get_client 1077 1050 -27 tcf_bpf_init 1106 1076 -30 nfsd4_encode_fattr 5997 5930 -67 Total: Before=154856051, After=154854321, chg -0.00% Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
661 lines
15 KiB
C
661 lines
15 KiB
C
/*
|
|
* Linux NET3: IP/IP protocol decoder modified to support
|
|
* virtual tunnel interface
|
|
*
|
|
* Authors:
|
|
* Saurabh Mohan (saurabh.mohan@vyatta.com) 05/07/2012
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
This version of net/ipv4/ip_vti.c is cloned of net/ipv4/ipip.c
|
|
|
|
For comments look at net/ipv4/ip_gre.c --ANK
|
|
*/
|
|
|
|
|
|
#include <linux/capability.h>
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/in.h>
|
|
#include <linux/tcp.h>
|
|
#include <linux/udp.h>
|
|
#include <linux/if_arp.h>
|
|
#include <linux/init.h>
|
|
#include <linux/netfilter_ipv4.h>
|
|
#include <linux/if_ether.h>
|
|
#include <linux/icmpv6.h>
|
|
|
|
#include <net/sock.h>
|
|
#include <net/ip.h>
|
|
#include <net/icmp.h>
|
|
#include <net/ip_tunnels.h>
|
|
#include <net/inet_ecn.h>
|
|
#include <net/xfrm.h>
|
|
#include <net/net_namespace.h>
|
|
#include <net/netns/generic.h>
|
|
|
|
static struct rtnl_link_ops vti_link_ops __read_mostly;
|
|
|
|
static unsigned int vti_net_id __read_mostly;
|
|
static int vti_tunnel_init(struct net_device *dev);
|
|
|
|
static int vti_input(struct sk_buff *skb, int nexthdr, __be32 spi,
|
|
int encap_type)
|
|
{
|
|
struct ip_tunnel *tunnel;
|
|
const struct iphdr *iph = ip_hdr(skb);
|
|
struct net *net = dev_net(skb->dev);
|
|
struct ip_tunnel_net *itn = net_generic(net, vti_net_id);
|
|
|
|
tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY,
|
|
iph->saddr, iph->daddr, 0);
|
|
if (tunnel) {
|
|
if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb))
|
|
goto drop;
|
|
|
|
XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = tunnel;
|
|
|
|
return xfrm_input(skb, nexthdr, spi, encap_type);
|
|
}
|
|
|
|
return -EINVAL;
|
|
drop:
|
|
kfree_skb(skb);
|
|
return 0;
|
|
}
|
|
|
|
static int vti_rcv(struct sk_buff *skb)
|
|
{
|
|
XFRM_SPI_SKB_CB(skb)->family = AF_INET;
|
|
XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
|
|
|
|
return vti_input(skb, ip_hdr(skb)->protocol, 0, 0);
|
|
}
|
|
|
|
static int vti_rcv_cb(struct sk_buff *skb, int err)
|
|
{
|
|
unsigned short family;
|
|
struct net_device *dev;
|
|
struct pcpu_sw_netstats *tstats;
|
|
struct xfrm_state *x;
|
|
struct xfrm_mode *inner_mode;
|
|
struct ip_tunnel *tunnel = XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4;
|
|
u32 orig_mark = skb->mark;
|
|
int ret;
|
|
|
|
if (!tunnel)
|
|
return 1;
|
|
|
|
dev = tunnel->dev;
|
|
|
|
if (err) {
|
|
dev->stats.rx_errors++;
|
|
dev->stats.rx_dropped++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
x = xfrm_input_state(skb);
|
|
|
|
inner_mode = x->inner_mode;
|
|
|
|
if (x->sel.family == AF_UNSPEC) {
|
|
inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol);
|
|
if (inner_mode == NULL) {
|
|
XFRM_INC_STATS(dev_net(skb->dev),
|
|
LINUX_MIB_XFRMINSTATEMODEERROR);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
family = inner_mode->afinfo->family;
|
|
|
|
skb->mark = be32_to_cpu(tunnel->parms.i_key);
|
|
ret = xfrm_policy_check(NULL, XFRM_POLICY_IN, skb, family);
|
|
skb->mark = orig_mark;
|
|
|
|
if (!ret)
|
|
return -EPERM;
|
|
|
|
skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(skb->dev)));
|
|
skb->dev = dev;
|
|
|
|
tstats = this_cpu_ptr(dev->tstats);
|
|
|
|
u64_stats_update_begin(&tstats->syncp);
|
|
tstats->rx_packets++;
|
|
tstats->rx_bytes += skb->len;
|
|
u64_stats_update_end(&tstats->syncp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool vti_state_check(const struct xfrm_state *x, __be32 dst, __be32 src)
|
|
{
|
|
xfrm_address_t *daddr = (xfrm_address_t *)&dst;
|
|
xfrm_address_t *saddr = (xfrm_address_t *)&src;
|
|
|
|
/* if there is no transform then this tunnel is not functional.
|
|
* Or if the xfrm is not mode tunnel.
|
|
*/
|
|
if (!x || x->props.mode != XFRM_MODE_TUNNEL ||
|
|
x->props.family != AF_INET)
|
|
return false;
|
|
|
|
if (!dst)
|
|
return xfrm_addr_equal(saddr, &x->props.saddr, AF_INET);
|
|
|
|
if (!xfrm_state_addr_check(x, daddr, saddr, AF_INET))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static netdev_tx_t vti_xmit(struct sk_buff *skb, struct net_device *dev,
|
|
struct flowi *fl)
|
|
{
|
|
struct ip_tunnel *tunnel = netdev_priv(dev);
|
|
struct ip_tunnel_parm *parms = &tunnel->parms;
|
|
struct dst_entry *dst = skb_dst(skb);
|
|
struct net_device *tdev; /* Device to other host */
|
|
int err;
|
|
int mtu;
|
|
|
|
if (!dst) {
|
|
dev->stats.tx_carrier_errors++;
|
|
goto tx_error_icmp;
|
|
}
|
|
|
|
dst_hold(dst);
|
|
dst = xfrm_lookup(tunnel->net, dst, fl, NULL, 0);
|
|
if (IS_ERR(dst)) {
|
|
dev->stats.tx_carrier_errors++;
|
|
goto tx_error_icmp;
|
|
}
|
|
|
|
if (!vti_state_check(dst->xfrm, parms->iph.daddr, parms->iph.saddr)) {
|
|
dev->stats.tx_carrier_errors++;
|
|
dst_release(dst);
|
|
goto tx_error_icmp;
|
|
}
|
|
|
|
tdev = dst->dev;
|
|
|
|
if (tdev == dev) {
|
|
dst_release(dst);
|
|
dev->stats.collisions++;
|
|
goto tx_error;
|
|
}
|
|
|
|
if (tunnel->err_count > 0) {
|
|
if (time_before(jiffies,
|
|
tunnel->err_time + IPTUNNEL_ERR_TIMEO)) {
|
|
tunnel->err_count--;
|
|
dst_link_failure(skb);
|
|
} else
|
|
tunnel->err_count = 0;
|
|
}
|
|
|
|
mtu = dst_mtu(dst);
|
|
if (skb->len > mtu) {
|
|
skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu);
|
|
if (skb->protocol == htons(ETH_P_IP)) {
|
|
icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
|
|
htonl(mtu));
|
|
} else {
|
|
if (mtu < IPV6_MIN_MTU)
|
|
mtu = IPV6_MIN_MTU;
|
|
|
|
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
|
|
}
|
|
|
|
dst_release(dst);
|
|
goto tx_error;
|
|
}
|
|
|
|
skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(dev)));
|
|
skb_dst_set(skb, dst);
|
|
skb->dev = skb_dst(skb)->dev;
|
|
|
|
err = dst_output(tunnel->net, skb->sk, skb);
|
|
if (net_xmit_eval(err) == 0)
|
|
err = skb->len;
|
|
iptunnel_xmit_stats(dev, err);
|
|
return NETDEV_TX_OK;
|
|
|
|
tx_error_icmp:
|
|
dst_link_failure(skb);
|
|
tx_error:
|
|
dev->stats.tx_errors++;
|
|
kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/* This function assumes it is being called from dev_queue_xmit()
|
|
* and that skb is filled properly by that function.
|
|
*/
|
|
static netdev_tx_t vti_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct ip_tunnel *tunnel = netdev_priv(dev);
|
|
struct flowi fl;
|
|
|
|
memset(&fl, 0, sizeof(fl));
|
|
|
|
switch (skb->protocol) {
|
|
case htons(ETH_P_IP):
|
|
xfrm_decode_session(skb, &fl, AF_INET);
|
|
memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
|
|
break;
|
|
case htons(ETH_P_IPV6):
|
|
xfrm_decode_session(skb, &fl, AF_INET6);
|
|
memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));
|
|
break;
|
|
default:
|
|
dev->stats.tx_errors++;
|
|
dev_kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/* override mark with tunnel output key */
|
|
fl.flowi_mark = be32_to_cpu(tunnel->parms.o_key);
|
|
|
|
return vti_xmit(skb, dev, &fl);
|
|
}
|
|
|
|
static int vti4_err(struct sk_buff *skb, u32 info)
|
|
{
|
|
__be32 spi;
|
|
__u32 mark;
|
|
struct xfrm_state *x;
|
|
struct ip_tunnel *tunnel;
|
|
struct ip_esp_hdr *esph;
|
|
struct ip_auth_hdr *ah ;
|
|
struct ip_comp_hdr *ipch;
|
|
struct net *net = dev_net(skb->dev);
|
|
const struct iphdr *iph = (const struct iphdr *)skb->data;
|
|
int protocol = iph->protocol;
|
|
struct ip_tunnel_net *itn = net_generic(net, vti_net_id);
|
|
|
|
tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY,
|
|
iph->daddr, iph->saddr, 0);
|
|
if (!tunnel)
|
|
return -1;
|
|
|
|
mark = be32_to_cpu(tunnel->parms.o_key);
|
|
|
|
switch (protocol) {
|
|
case IPPROTO_ESP:
|
|
esph = (struct ip_esp_hdr *)(skb->data+(iph->ihl<<2));
|
|
spi = esph->spi;
|
|
break;
|
|
case IPPROTO_AH:
|
|
ah = (struct ip_auth_hdr *)(skb->data+(iph->ihl<<2));
|
|
spi = ah->spi;
|
|
break;
|
|
case IPPROTO_COMP:
|
|
ipch = (struct ip_comp_hdr *)(skb->data+(iph->ihl<<2));
|
|
spi = htonl(ntohs(ipch->cpi));
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
switch (icmp_hdr(skb)->type) {
|
|
case ICMP_DEST_UNREACH:
|
|
if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
|
|
return 0;
|
|
case ICMP_REDIRECT:
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
x = xfrm_state_lookup(net, mark, (const xfrm_address_t *)&iph->daddr,
|
|
spi, protocol, AF_INET);
|
|
if (!x)
|
|
return 0;
|
|
|
|
if (icmp_hdr(skb)->type == ICMP_DEST_UNREACH)
|
|
ipv4_update_pmtu(skb, net, info, 0, 0, protocol, 0);
|
|
else
|
|
ipv4_redirect(skb, net, 0, 0, protocol, 0);
|
|
xfrm_state_put(x);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
vti_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
|
|
{
|
|
int err = 0;
|
|
struct ip_tunnel_parm p;
|
|
|
|
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
|
|
return -EFAULT;
|
|
|
|
if (cmd == SIOCADDTUNNEL || cmd == SIOCCHGTUNNEL) {
|
|
if (p.iph.version != 4 || p.iph.protocol != IPPROTO_IPIP ||
|
|
p.iph.ihl != 5)
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!(p.i_flags & GRE_KEY))
|
|
p.i_key = 0;
|
|
if (!(p.o_flags & GRE_KEY))
|
|
p.o_key = 0;
|
|
|
|
p.i_flags = VTI_ISVTI;
|
|
|
|
err = ip_tunnel_ioctl(dev, &p, cmd);
|
|
if (err)
|
|
return err;
|
|
|
|
if (cmd != SIOCDELTUNNEL) {
|
|
p.i_flags |= GRE_KEY;
|
|
p.o_flags |= GRE_KEY;
|
|
}
|
|
|
|
if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static const struct net_device_ops vti_netdev_ops = {
|
|
.ndo_init = vti_tunnel_init,
|
|
.ndo_uninit = ip_tunnel_uninit,
|
|
.ndo_start_xmit = vti_tunnel_xmit,
|
|
.ndo_do_ioctl = vti_tunnel_ioctl,
|
|
.ndo_change_mtu = ip_tunnel_change_mtu,
|
|
.ndo_get_stats64 = ip_tunnel_get_stats64,
|
|
.ndo_get_iflink = ip_tunnel_get_iflink,
|
|
};
|
|
|
|
static void vti_tunnel_setup(struct net_device *dev)
|
|
{
|
|
dev->netdev_ops = &vti_netdev_ops;
|
|
dev->type = ARPHRD_TUNNEL;
|
|
ip_tunnel_setup(dev, vti_net_id);
|
|
}
|
|
|
|
static int vti_tunnel_init(struct net_device *dev)
|
|
{
|
|
struct ip_tunnel *tunnel = netdev_priv(dev);
|
|
struct iphdr *iph = &tunnel->parms.iph;
|
|
|
|
memcpy(dev->dev_addr, &iph->saddr, 4);
|
|
memcpy(dev->broadcast, &iph->daddr, 4);
|
|
|
|
dev->hard_header_len = LL_MAX_HEADER + sizeof(struct iphdr);
|
|
dev->mtu = ETH_DATA_LEN;
|
|
dev->flags = IFF_NOARP;
|
|
dev->addr_len = 4;
|
|
dev->features |= NETIF_F_LLTX;
|
|
netif_keep_dst(dev);
|
|
|
|
return ip_tunnel_init(dev);
|
|
}
|
|
|
|
static void __net_init vti_fb_tunnel_init(struct net_device *dev)
|
|
{
|
|
struct ip_tunnel *tunnel = netdev_priv(dev);
|
|
struct iphdr *iph = &tunnel->parms.iph;
|
|
|
|
iph->version = 4;
|
|
iph->protocol = IPPROTO_IPIP;
|
|
iph->ihl = 5;
|
|
}
|
|
|
|
static struct xfrm4_protocol vti_esp4_protocol __read_mostly = {
|
|
.handler = vti_rcv,
|
|
.input_handler = vti_input,
|
|
.cb_handler = vti_rcv_cb,
|
|
.err_handler = vti4_err,
|
|
.priority = 100,
|
|
};
|
|
|
|
static struct xfrm4_protocol vti_ah4_protocol __read_mostly = {
|
|
.handler = vti_rcv,
|
|
.input_handler = vti_input,
|
|
.cb_handler = vti_rcv_cb,
|
|
.err_handler = vti4_err,
|
|
.priority = 100,
|
|
};
|
|
|
|
static struct xfrm4_protocol vti_ipcomp4_protocol __read_mostly = {
|
|
.handler = vti_rcv,
|
|
.input_handler = vti_input,
|
|
.cb_handler = vti_rcv_cb,
|
|
.err_handler = vti4_err,
|
|
.priority = 100,
|
|
};
|
|
|
|
static int __net_init vti_init_net(struct net *net)
|
|
{
|
|
int err;
|
|
struct ip_tunnel_net *itn;
|
|
|
|
err = ip_tunnel_init_net(net, vti_net_id, &vti_link_ops, "ip_vti0");
|
|
if (err)
|
|
return err;
|
|
itn = net_generic(net, vti_net_id);
|
|
vti_fb_tunnel_init(itn->fb_tunnel_dev);
|
|
return 0;
|
|
}
|
|
|
|
static void __net_exit vti_exit_net(struct net *net)
|
|
{
|
|
struct ip_tunnel_net *itn = net_generic(net, vti_net_id);
|
|
ip_tunnel_delete_net(itn, &vti_link_ops);
|
|
}
|
|
|
|
static struct pernet_operations vti_net_ops = {
|
|
.init = vti_init_net,
|
|
.exit = vti_exit_net,
|
|
.id = &vti_net_id,
|
|
.size = sizeof(struct ip_tunnel_net),
|
|
};
|
|
|
|
static int vti_tunnel_validate(struct nlattr *tb[], struct nlattr *data[])
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void vti_netlink_parms(struct nlattr *data[],
|
|
struct ip_tunnel_parm *parms)
|
|
{
|
|
memset(parms, 0, sizeof(*parms));
|
|
|
|
parms->iph.protocol = IPPROTO_IPIP;
|
|
|
|
if (!data)
|
|
return;
|
|
|
|
parms->i_flags = VTI_ISVTI;
|
|
|
|
if (data[IFLA_VTI_LINK])
|
|
parms->link = nla_get_u32(data[IFLA_VTI_LINK]);
|
|
|
|
if (data[IFLA_VTI_IKEY])
|
|
parms->i_key = nla_get_be32(data[IFLA_VTI_IKEY]);
|
|
|
|
if (data[IFLA_VTI_OKEY])
|
|
parms->o_key = nla_get_be32(data[IFLA_VTI_OKEY]);
|
|
|
|
if (data[IFLA_VTI_LOCAL])
|
|
parms->iph.saddr = nla_get_in_addr(data[IFLA_VTI_LOCAL]);
|
|
|
|
if (data[IFLA_VTI_REMOTE])
|
|
parms->iph.daddr = nla_get_in_addr(data[IFLA_VTI_REMOTE]);
|
|
|
|
}
|
|
|
|
static int vti_newlink(struct net *src_net, struct net_device *dev,
|
|
struct nlattr *tb[], struct nlattr *data[])
|
|
{
|
|
struct ip_tunnel_parm parms;
|
|
|
|
vti_netlink_parms(data, &parms);
|
|
return ip_tunnel_newlink(dev, tb, &parms);
|
|
}
|
|
|
|
static int vti_changelink(struct net_device *dev, struct nlattr *tb[],
|
|
struct nlattr *data[])
|
|
{
|
|
struct ip_tunnel_parm p;
|
|
|
|
vti_netlink_parms(data, &p);
|
|
return ip_tunnel_changelink(dev, tb, &p);
|
|
}
|
|
|
|
static size_t vti_get_size(const struct net_device *dev)
|
|
{
|
|
return
|
|
/* IFLA_VTI_LINK */
|
|
nla_total_size(4) +
|
|
/* IFLA_VTI_IKEY */
|
|
nla_total_size(4) +
|
|
/* IFLA_VTI_OKEY */
|
|
nla_total_size(4) +
|
|
/* IFLA_VTI_LOCAL */
|
|
nla_total_size(4) +
|
|
/* IFLA_VTI_REMOTE */
|
|
nla_total_size(4) +
|
|
0;
|
|
}
|
|
|
|
static int vti_fill_info(struct sk_buff *skb, const struct net_device *dev)
|
|
{
|
|
struct ip_tunnel *t = netdev_priv(dev);
|
|
struct ip_tunnel_parm *p = &t->parms;
|
|
|
|
nla_put_u32(skb, IFLA_VTI_LINK, p->link);
|
|
nla_put_be32(skb, IFLA_VTI_IKEY, p->i_key);
|
|
nla_put_be32(skb, IFLA_VTI_OKEY, p->o_key);
|
|
nla_put_in_addr(skb, IFLA_VTI_LOCAL, p->iph.saddr);
|
|
nla_put_in_addr(skb, IFLA_VTI_REMOTE, p->iph.daddr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct nla_policy vti_policy[IFLA_VTI_MAX + 1] = {
|
|
[IFLA_VTI_LINK] = { .type = NLA_U32 },
|
|
[IFLA_VTI_IKEY] = { .type = NLA_U32 },
|
|
[IFLA_VTI_OKEY] = { .type = NLA_U32 },
|
|
[IFLA_VTI_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) },
|
|
[IFLA_VTI_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
|
|
};
|
|
|
|
static struct rtnl_link_ops vti_link_ops __read_mostly = {
|
|
.kind = "vti",
|
|
.maxtype = IFLA_VTI_MAX,
|
|
.policy = vti_policy,
|
|
.priv_size = sizeof(struct ip_tunnel),
|
|
.setup = vti_tunnel_setup,
|
|
.validate = vti_tunnel_validate,
|
|
.newlink = vti_newlink,
|
|
.changelink = vti_changelink,
|
|
.dellink = ip_tunnel_dellink,
|
|
.get_size = vti_get_size,
|
|
.fill_info = vti_fill_info,
|
|
.get_link_net = ip_tunnel_get_link_net,
|
|
};
|
|
|
|
static bool is_vti_tunnel(const struct net_device *dev)
|
|
{
|
|
return dev->netdev_ops == &vti_netdev_ops;
|
|
}
|
|
|
|
static int vti_device_event(struct notifier_block *unused,
|
|
unsigned long event, void *ptr)
|
|
{
|
|
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
|
|
struct ip_tunnel *tunnel = netdev_priv(dev);
|
|
|
|
if (!is_vti_tunnel(dev))
|
|
return NOTIFY_DONE;
|
|
|
|
switch (event) {
|
|
case NETDEV_DOWN:
|
|
if (!net_eq(tunnel->net, dev_net(dev)))
|
|
xfrm_garbage_collect(tunnel->net);
|
|
break;
|
|
}
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block vti_notifier_block __read_mostly = {
|
|
.notifier_call = vti_device_event,
|
|
};
|
|
|
|
static int __init vti_init(void)
|
|
{
|
|
const char *msg;
|
|
int err;
|
|
|
|
pr_info("IPv4 over IPsec tunneling driver\n");
|
|
|
|
register_netdevice_notifier(&vti_notifier_block);
|
|
|
|
msg = "tunnel device";
|
|
err = register_pernet_device(&vti_net_ops);
|
|
if (err < 0)
|
|
goto pernet_dev_failed;
|
|
|
|
msg = "tunnel protocols";
|
|
err = xfrm4_protocol_register(&vti_esp4_protocol, IPPROTO_ESP);
|
|
if (err < 0)
|
|
goto xfrm_proto_esp_failed;
|
|
err = xfrm4_protocol_register(&vti_ah4_protocol, IPPROTO_AH);
|
|
if (err < 0)
|
|
goto xfrm_proto_ah_failed;
|
|
err = xfrm4_protocol_register(&vti_ipcomp4_protocol, IPPROTO_COMP);
|
|
if (err < 0)
|
|
goto xfrm_proto_comp_failed;
|
|
|
|
msg = "netlink interface";
|
|
err = rtnl_link_register(&vti_link_ops);
|
|
if (err < 0)
|
|
goto rtnl_link_failed;
|
|
|
|
return err;
|
|
|
|
rtnl_link_failed:
|
|
xfrm4_protocol_deregister(&vti_ipcomp4_protocol, IPPROTO_COMP);
|
|
xfrm_proto_comp_failed:
|
|
xfrm4_protocol_deregister(&vti_ah4_protocol, IPPROTO_AH);
|
|
xfrm_proto_ah_failed:
|
|
xfrm4_protocol_deregister(&vti_esp4_protocol, IPPROTO_ESP);
|
|
xfrm_proto_esp_failed:
|
|
unregister_pernet_device(&vti_net_ops);
|
|
pernet_dev_failed:
|
|
unregister_netdevice_notifier(&vti_notifier_block);
|
|
pr_err("vti init: failed to register %s\n", msg);
|
|
return err;
|
|
}
|
|
|
|
static void __exit vti_fini(void)
|
|
{
|
|
rtnl_link_unregister(&vti_link_ops);
|
|
xfrm4_protocol_deregister(&vti_ipcomp4_protocol, IPPROTO_COMP);
|
|
xfrm4_protocol_deregister(&vti_ah4_protocol, IPPROTO_AH);
|
|
xfrm4_protocol_deregister(&vti_esp4_protocol, IPPROTO_ESP);
|
|
unregister_pernet_device(&vti_net_ops);
|
|
unregister_netdevice_notifier(&vti_notifier_block);
|
|
}
|
|
|
|
module_init(vti_init);
|
|
module_exit(vti_fini);
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS_RTNL_LINK("vti");
|
|
MODULE_ALIAS_NETDEV("ip_vti0");
|