From: Eric Dumazet <edumazet@google.com>
Date: Wed, 27 May 2015 18:34:37 +0000 (-0700)
Subject: tcp/dccp: warn user for preferred ip_local_port_range
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~134^2~195
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ed2dfd900992aa7b6b3d0abd8ec9a7e9d2c7f827;p=pandora-kernel.git

tcp/dccp: warn user for preferred ip_local_port_range

After commit 07f4c90062f8f ("tcp/dccp: try to not exhaust
ip_local_port_range in connect()") it is advised to have an even number
of ports described in /proc/sys/net/ipv4/ip_local_port_range

This means start/end values should have a different parity.

Let's warn sysadmins of this, so that they can update their settings
if they want to.

Suggested-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index 6848b8bb2e63..c68926b4899c 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -19,6 +19,7 @@ struct sock;
 struct local_ports {
 	seqlock_t	lock;
 	int		range[2];
+	bool		warned;
 };
 
 struct ping_group_range {
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