ipv6: add flowinfo for tcp6 pkt_options for all cases

The current implementation of IPV6_FLOWINFO only gives a
result if pktoptions is available (thanks to the
ip6_datagram_recv_ctl function).
It gives inconsistent results to user space, sometimes
there is a result for getsockopt(IPV6_FLOWINFO), sometimes
not.

This patch add rcv_flowinfo to store it, and return it to
the userspace in the same way than other pkt_options.

Signed-off-by: Florent Fourcot <florent.fourcot@enst-bretagne.fr>
Reviewed-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index c56c350324e..0b2ebfbbe0f 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -201,6 +201,7 @@ struct ipv6_pinfo {
 	__u8			min_hopcount;
 	__u8			tclass;
 	__u8			rcv_tclass;
+	__be32			rcv_flowinfo;
 
 	__u32			dst_cookie;
 	__u32			rx_dst_cookie;