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-rw-r--r--net/ipv4/ip_tunnel_core.c130
1 files changed, 130 insertions, 0 deletions
diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index 6a51a71a6c67..630e6d5712e8 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -32,6 +32,7 @@
#include <linux/etherdevice.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
+#include <linux/static_key.h>
#include <net/ip.h>
#include <net/icmp.h>
@@ -190,3 +191,132 @@ struct rtnl_link_stats64 *ip_tunnel_get_stats64(struct net_device *dev,
return tot;
}
EXPORT_SYMBOL_GPL(ip_tunnel_get_stats64);
+
+static const struct nla_policy ip_tun_policy[IP_TUN_MAX + 1] = {
+ [IP_TUN_ID] = { .type = NLA_U64 },
+ [IP_TUN_DST] = { .type = NLA_U32 },
+ [IP_TUN_SRC] = { .type = NLA_U32 },
+ [IP_TUN_TTL] = { .type = NLA_U8 },
+ [IP_TUN_TOS] = { .type = NLA_U8 },
+ [IP_TUN_SPORT] = { .type = NLA_U16 },
+ [IP_TUN_DPORT] = { .type = NLA_U16 },
+ [IP_TUN_FLAGS] = { .type = NLA_U16 },
+};
+
+static int ip_tun_build_state(struct net_device *dev, struct nlattr *attr,
+ struct lwtunnel_state **ts)
+{
+ struct ip_tunnel_info *tun_info;
+ struct lwtunnel_state *new_state;
+ struct nlattr *tb[IP_TUN_MAX + 1];
+ int err;
+
+ err = nla_parse_nested(tb, IP_TUN_MAX, attr, ip_tun_policy);
+ if (err < 0)
+ return err;
+
+ new_state = lwtunnel_state_alloc(sizeof(*tun_info));
+ if (!new_state)
+ return -ENOMEM;
+
+ new_state->type = LWTUNNEL_ENCAP_IP;
+
+ tun_info = lwt_tun_info(new_state);
+
+ if (tb[IP_TUN_ID])
+ tun_info->key.tun_id = nla_get_u64(tb[IP_TUN_ID]);
+
+ if (tb[IP_TUN_DST])
+ tun_info->key.ipv4_dst = nla_get_be32(tb[IP_TUN_DST]);
+
+ if (tb[IP_TUN_SRC])
+ tun_info->key.ipv4_src = nla_get_be32(tb[IP_TUN_SRC]);
+
+ if (tb[IP_TUN_TTL])
+ tun_info->key.ipv4_ttl = nla_get_u8(tb[IP_TUN_TTL]);
+
+ if (tb[IP_TUN_TOS])
+ tun_info->key.ipv4_tos = nla_get_u8(tb[IP_TUN_TOS]);
+
+ if (tb[IP_TUN_SPORT])
+ tun_info->key.tp_src = nla_get_be16(tb[IP_TUN_SPORT]);
+
+ if (tb[IP_TUN_DPORT])
+ tun_info->key.tp_dst = nla_get_be16(tb[IP_TUN_DPORT]);
+
+ if (tb[IP_TUN_FLAGS])
+ tun_info->key.tun_flags = nla_get_u16(tb[IP_TUN_FLAGS]);
+
+ tun_info->mode = IP_TUNNEL_INFO_TX;
+ tun_info->options = NULL;
+ tun_info->options_len = 0;
+
+ *ts = new_state;
+
+ return 0;
+}
+
+static int ip_tun_fill_encap_info(struct sk_buff *skb,
+ struct lwtunnel_state *lwtstate)
+{
+ struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate);
+
+ if (nla_put_u64(skb, IP_TUN_ID, tun_info->key.tun_id) ||
+ nla_put_be32(skb, IP_TUN_DST, tun_info->key.ipv4_dst) ||
+ nla_put_be32(skb, IP_TUN_SRC, tun_info->key.ipv4_src) ||
+ nla_put_u8(skb, IP_TUN_TOS, tun_info->key.ipv4_tos) ||
+ nla_put_u8(skb, IP_TUN_TTL, tun_info->key.ipv4_ttl) ||
+ nla_put_u16(skb, IP_TUN_SPORT, tun_info->key.tp_src) ||
+ nla_put_u16(skb, IP_TUN_DPORT, tun_info->key.tp_dst) ||
+ nla_put_u16(skb, IP_TUN_FLAGS, tun_info->key.tun_flags))
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int ip_tun_encap_nlsize(struct lwtunnel_state *lwtstate)
+{
+ return nla_total_size(8) /* IP_TUN_ID */
+ + nla_total_size(4) /* IP_TUN_DST */
+ + nla_total_size(4) /* IP_TUN_SRC */
+ + nla_total_size(1) /* IP_TUN_TOS */
+ + nla_total_size(1) /* IP_TUN_TTL */
+ + nla_total_size(2) /* IP_TUN_SPORT */
+ + nla_total_size(2) /* IP_TUN_DPORT */
+ + nla_total_size(2); /* IP_TUN_FLAGS */
+}
+
+static const struct lwtunnel_encap_ops ip_tun_lwt_ops = {
+ .build_state = ip_tun_build_state,
+ .fill_encap = ip_tun_fill_encap_info,
+ .get_encap_size = ip_tun_encap_nlsize,
+};
+
+static int __init ip_tunnel_core_init(void)
+{
+ lwtunnel_encap_add_ops(&ip_tun_lwt_ops, LWTUNNEL_ENCAP_IP);
+
+ return 0;
+}
+module_init(ip_tunnel_core_init);
+
+static void __exit ip_tunnel_core_exit(void)
+{
+ lwtunnel_encap_del_ops(&ip_tun_lwt_ops, LWTUNNEL_ENCAP_IP);
+}
+module_exit(ip_tunnel_core_exit);
+
+struct static_key ip_tunnel_metadata_cnt = STATIC_KEY_INIT_FALSE;
+EXPORT_SYMBOL(ip_tunnel_metadata_cnt);
+
+void ip_tunnel_need_metadata(void)
+{
+ static_key_slow_inc(&ip_tunnel_metadata_cnt);
+}
+EXPORT_SYMBOL_GPL(ip_tunnel_need_metadata);
+
+void ip_tunnel_unneed_metadata(void)
+{
+ static_key_slow_dec(&ip_tunnel_metadata_cnt);
+}
+EXPORT_SYMBOL_GPL(ip_tunnel_unneed_metadata);