ipv6: add struct hop_jumbo_hdr definition

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

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Alexander Duyck <alexanderduyck@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 213612f..63d0199 100644 (file)
--- 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 2675 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