write in 30M

hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/net/mpls/mpls_iptunnel.c
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@@ -1,14 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * mpls tunnels	An implementation mpls tunnels using the light weight tunnel
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  *		infrastructure
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  *
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  * Authors:	Roopa Prabhu, <roopa@cumulusnetworks.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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  */
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 #include <linux/types.h>
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 #include <linux/skbuff.h>
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@@ -137,12 +132,22 @@
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132
 
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 	mpls_stats_inc_outucastpkts(out_dev, skb);
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-	if (rt)
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-		err = neigh_xmit(NEIGH_ARP_TABLE, out_dev, &rt->rt_gateway,
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-				 skb);
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-	else if (rt6)
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-		err = neigh_xmit(NEIGH_ND_TABLE, out_dev, &rt6->rt6i_gateway,
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-				 skb);
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+	if (rt) {
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+		if (rt->rt_gw_family == AF_INET6)
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+			err = neigh_xmit(NEIGH_ND_TABLE, out_dev, &rt->rt_gw6,
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+					 skb);
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+		else
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+			err = neigh_xmit(NEIGH_ARP_TABLE, out_dev, &rt->rt_gw4,
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+					 skb);
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+	} else if (rt6) {
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+		if (ipv6_addr_v4mapped(&rt6->rt6i_gateway)) {
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+			/* 6PE (RFC 4798) */
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+			err = neigh_xmit(NEIGH_ARP_TABLE, out_dev, &rt6->rt6i_gateway.s6_addr32[3],
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+					 skb);
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+		} else
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+			err = neigh_xmit(NEIGH_ND_TABLE, out_dev, &rt6->rt6i_gateway,
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+					 skb);
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+	}
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 	if (err)
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 		net_dbg_ratelimited("%s: packet transmission failed: %d\n",
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 				    __func__, err);
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@@ -157,7 +162,7 @@
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 	return -EINVAL;
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 }
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-static int mpls_build_state(struct nlattr *nla,
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+static int mpls_build_state(struct net *net, struct nlattr *nla,
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 			    unsigned int family, const void *cfg,
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 			    struct lwtunnel_state **ts,
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 			    struct netlink_ext_ack *extack)
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@@ -168,8 +173,8 @@
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 	u8 n_labels;
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 	int ret;
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-	ret = nla_parse_nested(tb, MPLS_IPTUNNEL_MAX, nla,
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-			       mpls_iptunnel_policy, extack);
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+	ret = nla_parse_nested_deprecated(tb, MPLS_IPTUNNEL_MAX, nla,
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+					  mpls_iptunnel_policy, extack);
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 	if (ret < 0)
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 		return ret;
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@@ -183,8 +188,8 @@
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 			   &n_labels, NULL, extack))
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 		return -EINVAL;
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-	newts = lwtunnel_state_alloc(sizeof(*tun_encap_info) +
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-				     n_labels * sizeof(u32));
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+	newts = lwtunnel_state_alloc(struct_size(tun_encap_info, label,
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+						 n_labels));
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 	if (!newts)
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 		return -ENOMEM;
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@@ -295,5 +300,6 @@
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 module_exit(mpls_iptunnel_exit);
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 MODULE_ALIAS_RTNL_LWT(MPLS);
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+MODULE_SOFTDEP("post: mpls_gso");
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 MODULE_DESCRIPTION("MultiProtocol Label Switching IP Tunnels");
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 MODULE_LICENSE("GPL v2");