From 42240901f7c438636715b9cb6ed93f4441ffc091 Mon Sep 17 00:00:00 2001
From: Tom Herbert <tom@herbertland.com>
Date: Fri, 31 Jul 2015 16:52:12 -0700
Subject: [PATCH] ipv6: Implement different admin modes for automatic flow
 labels

Change the meaning of net.ipv6.auto_flowlabels to provide a mode for
automatic flow labels generation. There are four modes:

0: flow labels are disabled
1: flow labels are enabled, sockets can opt-out
2: flow labels are allowed, sockets can opt-in
3: flow labels are enabled and enforced, no opt-out for sockets

np->autoflowlabel is initialized according to the sysctl value.

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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