netdev - [PATCH v2 net-next 04/14] ipv6: add struct hop_jumbo

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Date:   Thu,  3 Mar 2022 10:15:57 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Coco Li <lixiaoyan@...gle.com>,
        David Ahern <dsahern@...nel.org>,
        Alexander Duyck <alexanderduyck@...com>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: [PATCH v2 net-next 04/14] ipv6: add struct hop_jumbo_hdr definition

From: Eric Dumazet <edumazet@...gle.com>

Following patches will need to add and remove local IPv6 jumbogram
options to enable BIG TCP.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 include/net/ipv6.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 213612f1680c7c39f4c07f0c05b4e6cf34a7878e..95f405cde9e539d7909b6b89af2b956655f38b94 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -151,6 +151,17 @@ struct frag_hdr {
 	__be32	identification;
 };
 
+/*
+ * Jumbo payload option, as described in RFC 2676 2.
+ */
+struct hop_jumbo_hdr {
+	u8	nexthdr;
+	u8	hdrlen;
+	u8	tlv_type;	/* IPV6_TLV_JUMBO, 0xC2 */
+	u8	tlv_len;	/* 4 */
+	__be32	jumbo_payload_len;
+};
+
 #define	IP6_MF		0x0001
 #define	IP6_OFFSET	0xFFF8
 
-- 
2.35.1.616.g0bdcbb4464-goog