From 3b6fd8227cbb03b5b211d2cb53534ad405673668 Mon Sep 17 00:00:00 2001
From: Matteo Croce <mcroce@redhat.com>
Date: Wed, 2 Aug 2017 13:57:17 +0200
Subject: [PATCH] ip neigh: allow flush FAILED neighbour entry

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1469945
Tested: locally using proper reproducer
Upstream Status: merged 37a5f7c5

commit 37a5f7c571623059ae671992f72feaa444a6ffc8
Author: Hangbin Liu <liuhangbin@gmail.com>
Date:   Fri Jun 16 11:31:52 2017 +0800

    ip neigh: allow flush FAILED neighbour entry

    After upstream commit 5071034e4af7 ('neigh: Really delete an arp/neigh entry
    on "ip neigh delete" or "arp -d"'), we could delete a single FAILED neighbour
    entry now. But `ip neigh flush` still skip the FAILED entry.

    Move the filter after first round flush so we can flush FAILED entry on fixed
    kernel and also do not keep retrying on old kernel.

    Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>

Signed-off-by: Matteo Croce <mcroce@redhat.com>
---
 ip/ipneigh.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ip/ipneigh.c b/ip/ipneigh.c
index 4d8fc85..9c38a60 100644
--- a/ip/ipneigh.c
+++ b/ip/ipneigh.c
@@ -445,7 +445,6 @@ static int do_show_or_flush(int argc, char **argv, int flush)
 		filter.flushb = flushb;
 		filter.flushp = 0;
 		filter.flushe = sizeof(flushb);
-		filter.state &= ~NUD_FAILED;
 
 		while (round < MAX_ROUNDS) {
 			if (rtnl_dump_request_n(&rth, &req.n) < 0) {
@@ -474,6 +473,7 @@ static int do_show_or_flush(int argc, char **argv, int flush)
 				printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed);
 				fflush(stdout);
 			}
+			filter.state &= ~NUD_FAILED;
 		}
 		printf("*** Flush not complete bailing out after %d rounds\n",
 			MAX_ROUNDS);
-- 
1.8.3.1