From 3cfb170def0cfa4b4048ee1e153b29b460ff54f1 Mon Sep 17 00:00:00 2001
From: Phil Sutter <psutter@redhat.com>
Date: Tue, 8 Mar 2016 18:35:16 +0100
Subject: [PATCH] libnetlink: Double the dump buffer size

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1304840
Upstream Status: iproute2.git commit 72b365e8e0fd5

commit 72b365e8e0fd5efe1d5c05d04c25950736635cfb
Author: Phil Sutter <phil@nwl.cc>
Date:   Fri Mar 4 19:57:28 2016 +0100

    libnetlink: Double the dump buffer size

    There have been reports about 'ip addr' printing "Message truncated" on
    systems with large numbers of VFs. Although I haven't been able to get
    my hands on hardware suitable to reproduce this, increasing the dump
    buffer has been reported to resolve the issue. For want of a better
    idea, just double the buffer size to 32k.

    Feels like this opportunistic buffer size selection is rather
    workarounding a design flaw in libnetlink or maybe even the netlink
    protocol itself.

    Signed-off-by: Phil Sutter <phil@nwl.cc>
---
 lib/libnetlink.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/libnetlink.c b/lib/libnetlink.c
index b2a300e..96bde59 100644
--- a/lib/libnetlink.c
+++ b/lib/libnetlink.c
@@ -202,7 +202,7 @@ int rtnl_dump_filter_l(struct rtnl_handle *rth,
 		.msg_iov = &iov,
 		.msg_iovlen = 1,
 	};
-	char buf[16384];
+	char buf[32768];
 	int dump_intr = 0;
 
 	iov.iov_base = buf;
-- 
1.8.3.1