From c560900fc16eeac064cc7c43a96c5343fe68ae76 Mon Sep 17 00:00:00 2001
From: Hangbin Liu <haliu@redhat.com>
Date: Wed, 8 Nov 2017 14:39:11 +0800
Subject: [PATCH] iplink: double the buffer size also in iplink_get()

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1380803
Upstream Status: iproute2.git commit 460c03f3f3cc

commit 460c03f3f3cc436ff4673d75722ba68a6ec9343d
Author: Michal Kubecek <mkubecek@suse.cz>
Date:   Fri Sep 1 18:39:16 2017 +0200

    iplink: double the buffer size also in iplink_get()

    Commit 72b365e8e0fd ("libnetlink: Double the dump buffer size") increased
    the buffer size for "ip link show" command to 32 KB to handle NICs with
    large number of VFs. With "dev" filter, a different code path is taken and
    iplink_get() still uses only 16 KB buffer.

    The size of 32768 is not very future-proof as NICs supporting 120-128 VFs
    are already in use so that single RTM_NEWLINK message in the dump can
    exceed 30000 bytes. But it's what rtnl_talk() and rtnl_dump_filter_l() use
    so let's be consistent. Once this proves insufficient, all three sizes
    should be increased.

    Signed-off-by: Michal Kubecek <mkubecek@suse.cz>

Signed-off-by: Hangbin Liu <haliu@redhat.com>
---
 ip/iplink.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ip/iplink.c b/ip/iplink.c
index 2b2421f9a2281..5afbadf0ce383 100644
--- a/ip/iplink.c
+++ b/ip/iplink.c
@@ -1015,7 +1015,7 @@ int iplink_get(unsigned int flags, char *name, __u32 filt_mask)
 	};
 	struct {
 		struct nlmsghdr n;
-		char buf[16384];
+		char buf[32768];
 	} answer;
 
 	if (name) {
-- 
2.21.0