#include <net/inet_ecn.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
+#include <net/dst_metadata.h>
MODULE_AUTHOR("Ville Nuorvala");
MODULE_DESCRIPTION("IPv6 tunneling device");
MODULE_ALIAS_RTNL_LINK("ip6tnl");
MODULE_ALIAS_NETDEV("ip6tnl0");
-#define HASH_SIZE_SHIFT 5
-#define HASH_SIZE (1 << HASH_SIZE_SHIFT)
+#define IP6_TUNNEL_HASH_SIZE_SHIFT 5
+#define IP6_TUNNEL_HASH_SIZE (1 << IP6_TUNNEL_HASH_SIZE_SHIFT)
static bool log_ecn_error = true;
module_param(log_ecn_error, bool, 0644);
{
u32 hash = ipv6_addr_hash(addr1) ^ ipv6_addr_hash(addr2);
- return hash_32(hash, HASH_SIZE_SHIFT);
+ return hash_32(hash, IP6_TUNNEL_HASH_SIZE_SHIFT);
}
static int ip6_tnl_dev_init(struct net_device *dev);
/* the IPv6 tunnel fallback device */
struct net_device *fb_tnl_dev;
/* lists for storing tunnels in use */
- struct ip6_tnl __rcu *tnls_r_l[HASH_SIZE];
+ struct ip6_tnl __rcu *tnls_r_l[IP6_TUNNEL_HASH_SIZE];
struct ip6_tnl __rcu *tnls_wc[1];
struct ip6_tnl __rcu **tnls[2];
+ struct ip6_tnl __rcu *collect_md_tun;
};
static struct net_device_stats *ip6_get_stats(struct net_device *dev)
return t;
}
+ t = rcu_dereference(ip6n->collect_md_tun);
+ if (t)
+ return t;
+
t = rcu_dereference(ip6n->tnls_wc[0]);
if (t && (t->dev->flags & IFF_UP))
return t;
{
struct ip6_tnl __rcu **tp = ip6_tnl_bucket(ip6n, &t->parms);
+ if (t->parms.collect_md)
+ rcu_assign_pointer(ip6n->collect_md_tun, t);
rcu_assign_pointer(t->next , rtnl_dereference(*tp));
rcu_assign_pointer(*tp, t);
}
struct ip6_tnl __rcu **tp;
struct ip6_tnl *iter;
+ if (t->parms.collect_md)
+ rcu_assign_pointer(ip6n->collect_md_tun, NULL);
+
for (tp = ip6_tnl_bucket(ip6n, &t->parms);
(iter = rtnl_dereference(*tp)) != NULL;
tp = &iter->next) {
skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(tunnel->dev)));
+ if (tun_dst)
+ skb_dst_set(skb, (struct dst_entry *)tun_dst);
+
gro_cells_receive(&tunnel->gro_cells, skb);
return 0;
{
struct ip6_tnl *t;
const struct ipv6hdr *ipv6h = ipv6_hdr(skb);
+ struct metadata_dst *tun_dst = NULL;
int ret = -1;
rcu_read_lock();
goto drop;
if (iptunnel_pull_header(skb, 0, tpi->proto, false))
goto drop;
- ret = __ip6_tnl_rcv(t, skb, tpi, NULL, dscp_ecn_decapsulate,
+ if (t->parms.collect_md) {
+ tun_dst = ipv6_tun_rx_dst(skb, 0, 0, 0);
+ if (!tun_dst)
+ return 0;
+ }
+ ret = __ip6_tnl_rcv(t, skb, tpi, tun_dst, dscp_ecn_decapsulate,
log_ecn_error);
}
int mtu;
unsigned int psh_hlen = sizeof(struct ipv6hdr) + t->encap_hlen;
unsigned int max_headroom = psh_hlen;
+ u8 hop_limit;
int err = -1;
+ if (t->parms.collect_md) {
+ hop_limit = skb_tunnel_info(skb)->key.ttl;
+ goto route_lookup;
+ } else {
+ hop_limit = t->parms.hop_limit;
+ }
+
/* NBMA tunnel */
if (ipv6_addr_any(&t->parms.raddr)) {
struct in6_addr *addr6;
goto tx_err_link_failure;
if (!dst) {
+route_lookup:
dst = ip6_route_output(net, NULL, fl6);
if (dst->error)
dst = NULL;
goto tx_err_link_failure;
}
+ if (t->parms.collect_md &&
+ ipv6_dev_get_saddr(net, ip6_dst_idev(dst)->dev,
+ &fl6->daddr, 0, &fl6->saddr))
+ goto tx_err_link_failure;
ndst = dst;
}
}
if (mtu < IPV6_MIN_MTU)
mtu = IPV6_MIN_MTU;
- if (skb_dst(skb))
+ if (skb_dst(skb) && !t->parms.collect_md)
skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu);
if (skb->len > mtu && !skb_is_gso(skb)) {
*pmtu = mtu;
skb = new_skb;
}
- if (!fl6->flowi6_mark && ndst)
- dst_cache_set_ip6(&t->dst_cache, ndst, &fl6->saddr);
+ if (t->parms.collect_md) {
+ if (t->encap.type != TUNNEL_ENCAP_NONE)
+ goto tx_err_dst_release;
+ } else {
+ if (!fl6->flowi6_mark && ndst)
+ dst_cache_set_ip6(&t->dst_cache, ndst, &fl6->saddr);
+ }
skb_dst_set(skb, dst);
if (encap_limit >= 0) {
ipv6h = ipv6_hdr(skb);
ip6_flow_hdr(ipv6h, INET_ECN_encapsulate(0, dsfield),
ip6_make_flowlabel(net, skb, fl6->flowlabel, true, fl6));
- ipv6h->hop_limit = t->parms.hop_limit;
+ ipv6h->hop_limit = hop_limit;
ipv6h->nexthdr = proto;
ipv6h->saddr = fl6->saddr;
ipv6h->daddr = fl6->daddr;
if (tproto != IPPROTO_IPIP && tproto != 0)
return -1;
- if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT))
- encap_limit = t->parms.encap_limit;
+ dsfield = ipv4_get_dsfield(iph);
- memcpy(&fl6, &t->fl.u.ip6, sizeof(fl6));
- fl6.flowi6_proto = IPPROTO_IPIP;
+ if (t->parms.collect_md) {
+ struct ip_tunnel_info *tun_info;
+ const struct ip_tunnel_key *key;
- dsfield = ipv4_get_dsfield(iph);
+ tun_info = skb_tunnel_info(skb);
+ if (unlikely(!tun_info || !(tun_info->mode & IP_TUNNEL_INFO_TX) ||
+ ip_tunnel_info_af(tun_info) != AF_INET6))
+ return -1;
+ key = &tun_info->key;
+ memset(&fl6, 0, sizeof(fl6));
+ fl6.flowi6_proto = IPPROTO_IPIP;
+ fl6.daddr = key->u.ipv6.dst;
+ fl6.flowlabel = key->label;
+ } else {
+ if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT))
+ encap_limit = t->parms.encap_limit;
- if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS)
- fl6.flowlabel |= htonl((__u32)iph->tos << IPV6_TCLASS_SHIFT)
- & IPV6_TCLASS_MASK;
- if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
- fl6.flowi6_mark = skb->mark;
+ memcpy(&fl6, &t->fl.u.ip6, sizeof(fl6));
+ fl6.flowi6_proto = IPPROTO_IPIP;
+
+ if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS)
+ fl6.flowlabel |= htonl((__u32)iph->tos << IPV6_TCLASS_SHIFT)
+ & IPV6_TCLASS_MASK;
+ if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
+ fl6.flowi6_mark = skb->mark;
+ }
if (iptunnel_handle_offloads(skb, SKB_GSO_IPXIP6))
return -1;
ip6_tnl_addr_conflict(t, ipv6h))
return -1;
- offset = ip6_tnl_parse_tlv_enc_lim(skb, skb_network_header(skb));
- if (offset > 0) {
- struct ipv6_tlv_tnl_enc_lim *tel;
- tel = (struct ipv6_tlv_tnl_enc_lim *)&skb_network_header(skb)[offset];
- if (tel->encap_limit == 0) {
- icmpv6_send(skb, ICMPV6_PARAMPROB,
- ICMPV6_HDR_FIELD, offset + 2);
+ dsfield = ipv6_get_dsfield(ipv6h);
+
+ if (t->parms.collect_md) {
+ struct ip_tunnel_info *tun_info;
+ const struct ip_tunnel_key *key;
+
+ tun_info = skb_tunnel_info(skb);
+ if (unlikely(!tun_info || !(tun_info->mode & IP_TUNNEL_INFO_TX) ||
+ ip_tunnel_info_af(tun_info) != AF_INET6))
return -1;
+ key = &tun_info->key;
+ memset(&fl6, 0, sizeof(fl6));
+ fl6.flowi6_proto = IPPROTO_IPV6;
+ fl6.daddr = key->u.ipv6.dst;
+ fl6.flowlabel = key->label;
+ } else {
+ offset = ip6_tnl_parse_tlv_enc_lim(skb, skb_network_header(skb));
+ if (offset > 0) {
+ struct ipv6_tlv_tnl_enc_lim *tel;
+
+ tel = (void *)&skb_network_header(skb)[offset];
+ if (tel->encap_limit == 0) {
+ icmpv6_send(skb, ICMPV6_PARAMPROB,
+ ICMPV6_HDR_FIELD, offset + 2);
+ return -1;
+ }
+ encap_limit = tel->encap_limit - 1;
+ } else if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) {
+ encap_limit = t->parms.encap_limit;
}
- encap_limit = tel->encap_limit - 1;
- } else if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT))
- encap_limit = t->parms.encap_limit;
- memcpy(&fl6, &t->fl.u.ip6, sizeof(fl6));
- fl6.flowi6_proto = IPPROTO_IPV6;
+ memcpy(&fl6, &t->fl.u.ip6, sizeof(fl6));
+ fl6.flowi6_proto = IPPROTO_IPV6;
- dsfield = ipv6_get_dsfield(ipv6h);
- if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS)
- fl6.flowlabel |= (*(__be32 *) ipv6h & IPV6_TCLASS_MASK);
- if (t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL)
- fl6.flowlabel |= ip6_flowlabel(ipv6h);
- if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
- fl6.flowi6_mark = skb->mark;
+ if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS)
+ fl6.flowlabel |= (*(__be32 *)ipv6h & IPV6_TCLASS_MASK);
+ if (t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL)
+ fl6.flowlabel |= ip6_flowlabel(ipv6h);
+ if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
+ fl6.flowi6_mark = skb->mark;
+ }
if (iptunnel_handle_offloads(skb, SKB_GSO_IPXIP6))
return -1;
if (err)
return err;
ip6_tnl_link_config(t);
+ if (t->parms.collect_md) {
+ dev->features |= NETIF_F_NETNS_LOCAL;
+ netif_keep_dst(dev);
+ }
return 0;
}
if (data[IFLA_IPTUN_PROTO])
parms->proto = nla_get_u8(data[IFLA_IPTUN_PROTO]);
+
+ if (data[IFLA_IPTUN_COLLECT_METADATA])
+ parms->collect_md = true;
}
static bool ip6_tnl_netlink_encap_parms(struct nlattr *data[],
struct nlattr *tb[], struct nlattr *data[])
{
struct net *net = dev_net(dev);
+ struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
struct ip6_tnl *nt, *t;
struct ip_tunnel_encap ipencap;
ip6_tnl_netlink_parms(data, &nt->parms);
- t = ip6_tnl_locate(net, &nt->parms, 0);
- if (!IS_ERR(t))
- return -EEXIST;
+ if (nt->parms.collect_md) {
+ if (rtnl_dereference(ip6n->collect_md_tun))
+ return -EEXIST;
+ } else {
+ t = ip6_tnl_locate(net, &nt->parms, 0);
+ if (!IS_ERR(t))
+ return -EEXIST;
+ }
return ip6_tnl_create2(dev);
}
return err;
}
ip6_tnl_netlink_parms(data, &p);
+ if (p.collect_md)
+ return -EINVAL;
t = ip6_tnl_locate(net, &p, 0);
if (!IS_ERR(t)) {
nla_total_size(2) +
/* IFLA_IPTUN_ENCAP_DPORT */
nla_total_size(2) +
+ /* IFLA_IPTUN_COLLECT_METADATA */
+ nla_total_size(0) +
0;
}
nla_put_u8(skb, IFLA_IPTUN_PROTO, parm->proto))
goto nla_put_failure;
- if (nla_put_u16(skb, IFLA_IPTUN_ENCAP_TYPE,
- tunnel->encap.type) ||
- nla_put_be16(skb, IFLA_IPTUN_ENCAP_SPORT,
- tunnel->encap.sport) ||
- nla_put_be16(skb, IFLA_IPTUN_ENCAP_DPORT,
- tunnel->encap.dport) ||
- nla_put_u16(skb, IFLA_IPTUN_ENCAP_FLAGS,
- tunnel->encap.flags))
+ if (nla_put_u16(skb, IFLA_IPTUN_ENCAP_TYPE, tunnel->encap.type) ||
+ nla_put_be16(skb, IFLA_IPTUN_ENCAP_SPORT, tunnel->encap.sport) ||
+ nla_put_be16(skb, IFLA_IPTUN_ENCAP_DPORT, tunnel->encap.dport) ||
+ nla_put_u16(skb, IFLA_IPTUN_ENCAP_FLAGS, tunnel->encap.flags))
goto nla_put_failure;
+ if (parm->collect_md)
+ if (nla_put_flag(skb, IFLA_IPTUN_COLLECT_METADATA))
+ goto nla_put_failure;
return 0;
nla_put_failure:
[IFLA_IPTUN_ENCAP_FLAGS] = { .type = NLA_U16 },
[IFLA_IPTUN_ENCAP_SPORT] = { .type = NLA_U16 },
[IFLA_IPTUN_ENCAP_DPORT] = { .type = NLA_U16 },
+ [IFLA_IPTUN_COLLECT_METADATA] = { .type = NLA_FLAG },
};
static struct rtnl_link_ops ip6_link_ops __read_mostly = {
if (dev->rtnl_link_ops == &ip6_link_ops)
unregister_netdevice_queue(dev, &list);
- for (h = 0; h < HASH_SIZE; h++) {
+ for (h = 0; h < IP6_TUNNEL_HASH_SIZE; h++) {
t = rtnl_dereference(ip6n->tnls_r_l[h]);
while (t) {
/* If dev is in the same netns, it has already
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