add REDIRECT

hc

2024-10-09 05e59e5fb0064c97a1c10921ecd549f2d4a58565

 kernel/net/ipv6/seg6_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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  *  SR-IPv6 implementation
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  *
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  *  Author:
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  *  David Lebrun <david.lebrun@uclouvain.be>
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- *
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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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 #include <linux/types.h>
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@@ -32,9 +27,26 @@
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 #include <net/seg6_hmac.h>
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 #endif
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29
 
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+static size_t seg6_lwt_headroom(struct seg6_iptunnel_encap *tuninfo)
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+{
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+	int head = 0;
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+
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+	switch (tuninfo->mode) {
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+	case SEG6_IPTUN_MODE_INLINE:
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+		break;
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+	case SEG6_IPTUN_MODE_ENCAP:
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+		head = sizeof(struct ipv6hdr);
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+		break;
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+	case SEG6_IPTUN_MODE_L2ENCAP:
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+		return 0;
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+	}
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+
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+	return ((tuninfo->srh->hdrlen + 1) << 3) + head;
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+}
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+
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 struct seg6_lwt {
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 	struct dst_cache cache;
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-	struct seg6_iptunnel_encap tuninfo[0];
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+	struct seg6_iptunnel_encap tuninfo[];
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 };
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 static inline struct seg6_lwt *seg6_lwt_lwtunnel(struct lwtunnel_state *lwt)
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@@ -176,6 +188,8 @@
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 	}
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 #endif
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+	hdr->payload_len = htons(skb->len - sizeof(struct ipv6hdr));
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+
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 	skb_postpush_rcsum(skb, hdr, tot_len);
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 	return 0;
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@@ -227,6 +241,8 @@
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 			return err;
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 	}
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 #endif
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+
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+	hdr->payload_len = htons(skb->len - sizeof(struct ipv6hdr));
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 	skb_postpush_rcsum(skb, hdr, sizeof(struct ipv6hdr) + hdrlen);
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@@ -281,7 +297,7 @@
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 		skb_mac_header_rebuild(skb);
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 		skb_push(skb, skb->mac_len);
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-		err = seg6_do_srh_encap(skb, tinfo->srh, NEXTHDR_NONE);
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+		err = seg6_do_srh_encap(skb, tinfo->srh, IPPROTO_ETHERNET);
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 		if (err)
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 			return err;
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@@ -289,7 +305,6 @@
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 		break;
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 	}
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-	ipv6_hdr(skb)->payload_len = htons(skb->len - sizeof(struct ipv6hdr));
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 	skb_set_transport_header(skb, sizeof(struct ipv6hdr));
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 	return 0;
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@@ -389,7 +404,7 @@
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 	return err;
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 }
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-static int seg6_build_state(struct nlattr *nla,
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+static int seg6_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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@@ -404,8 +419,8 @@
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 	if (family != AF_INET && family != AF_INET6)
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 		return -EINVAL;
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-	err = nla_parse_nested(tb, SEG6_IPTUNNEL_MAX, nla,
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-			       seg6_iptunnel_policy, extack);
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+	err = nla_parse_nested_deprecated(tb, SEG6_IPTUNNEL_MAX, nla,
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+					  seg6_iptunnel_policy, extack);
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 	if (err < 0)
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 		return err;
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@@ -439,7 +454,7 @@
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 	}
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 	/* verify that SRH is consistent */
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-	if (!seg6_validate_srh(tuninfo->srh, tuninfo_len - sizeof(*tuninfo)))
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+	if (!seg6_validate_srh(tuninfo->srh, tuninfo_len - sizeof(*tuninfo), false))
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 		return -EINVAL;
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 	newts = lwtunnel_state_alloc(tuninfo_len + sizeof(*slwt));