1 files changed, 64 insertions, 6 deletions

diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index daf80863d3a5..8dfc65639aa4 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -1,13 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *	Linux INET6 implementation
  *
  *	Authors:
  *	Pedro Roque		<roque@di.fc.ul.pt>
- *
- *	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.
  */
 
 #ifndef _NET_IPV6_H
@@ -17,6 +13,7 @@
 #include <linux/hardirq.h>
 #include <linux/jhash.h>
 #include <linux/refcount.h>
+#include <linux/jump_label_ratelimit.h>
 #include <net/if_inet6.h>
 #include <net/ndisc.h>
 #include <net/flow.h>
@@ -154,6 +151,49 @@ struct frag_hdr {
 #define	IP6_MF		0x0001
 #define	IP6_OFFSET	0xFFF8
 
+struct ip6_fraglist_iter {
+	struct ipv6hdr	*tmp_hdr;
+	struct sk_buff	*frag;
+	int		offset;
+	unsigned int	hlen;
+	__be32		frag_id;
+	u8		nexthdr;
+};
+
+int ip6_fraglist_init(struct sk_buff *skb, unsigned int hlen, u8 *prevhdr,
+		      u8 nexthdr, __be32 frag_id,
+		      struct ip6_fraglist_iter *iter);
+void ip6_fraglist_prepare(struct sk_buff *skb, struct ip6_fraglist_iter *iter);
+
+static inline struct sk_buff *ip6_fraglist_next(struct ip6_fraglist_iter *iter)
+{
+	struct sk_buff *skb = iter->frag;
+
+	iter->frag = skb->next;
+	skb_mark_not_on_list(skb);
+
+	return skb;
+}
+
+struct ip6_frag_state {
+	u8		*prevhdr;
+	unsigned int	hlen;
+	unsigned int	mtu;
+	unsigned int	left;
+	int		offset;
+	int		ptr;
+	int		hroom;
+	int		troom;
+	__be32		frag_id;
+	u8		nexthdr;
+};
+
+void ip6_frag_init(struct sk_buff *skb, unsigned int hlen, unsigned int mtu,
+		   unsigned short needed_tailroom, int hdr_room, u8 *prevhdr,
+		   u8 nexthdr, __be32 frag_id, struct ip6_frag_state *state);
+struct sk_buff *ip6_frag_next(struct sk_buff *skb,
+			      struct ip6_frag_state *state);
+
 #define IP6_REPLY_MARK(net, mark) \
 	((net)->ipv6.sysctl.fwmark_reflect ? (mark) : 0)
 
@@ -262,6 +302,13 @@ struct ipv6_txoptions {
 	/* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
 };
 
+/* flowlabel_reflect sysctl values */
+enum flowlabel_reflect {
+	FLOWLABEL_REFLECT_ESTABLISHED		= 1,
+	FLOWLABEL_REFLECT_TCP_RESET		= 2,
+	FLOWLABEL_REFLECT_ICMPV6_ECHO_REPLIES	= 4,
+};
+
 struct ip6_flowlabel {
 	struct ip6_flowlabel __rcu *next;
 	__be32			label;
@@ -343,7 +390,18 @@ static inline void txopt_put(struct ipv6_txoptions *opt)
 		kfree_rcu(opt, rcu);
 }
 
-struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
+struct ip6_flowlabel *__fl6_sock_lookup(struct sock *sk, __be32 label);
+
+extern struct static_key_false_deferred ipv6_flowlabel_exclusive;
+static inline struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk,
+						    __be32 label)
+{
+	if (static_branch_unlikely(&ipv6_flowlabel_exclusive.key))
+		return __fl6_sock_lookup(sk, label) ? : ERR_PTR(-ENOENT);
+
+	return NULL;
+}
+
 struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space,
 					 struct ip6_flowlabel *fl,
 					 struct ipv6_txoptions *fopt);