netdev - [patch net-next v2 6/9] mlxsw: spectrum_router: Don't destroy RIF if L3 slave

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Date:   Wed, 15 Mar 2017 12:05:09 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, idosch@...lanox.com, mlxsw@...lanox.com,
        dsa@...ulusnetworks.com, shm@...ulusnetworks.com,
        kuznet@....inr.ac.ru, jmorris@...ei.org, yoshfuji@...ux-ipv6.org,
        kaber@...sh.net, lorenzo@...gle.com, mateusz.bajorski@...ia.com
Subject: [patch net-next v2 6/9] mlxsw: spectrum_router: Don't destroy RIF if L3 slave

From: Ido Schimmel <idosch@...lanox.com>

We usually destroy the netdev's router interface (RIF) when the last IP
address is removed from it.

However, we shouldn't do that if it's enslaved to an L3 master device.

Signed-off-by: Ido Schimmel <idosch@...lanox.com>
Signed-off-by: Jiri Pirko <jiri@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index c29713a..ff3cf55 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -41,6 +41,7 @@
 #include <linux/in6.h>
 #include <linux/notifier.h>
 #include <linux/inetdevice.h>
+#include <linux/netdevice.h>
 #include <net/netevent.h>
 #include <net/neighbour.h>
 #include <net/arp.h>
@@ -2669,7 +2670,7 @@ static bool mlxsw_sp_rif_should_config(struct mlxsw_sp_rif *r,
 			return true;
 		return false;
 	case NETDEV_DOWN:
-		if (r && !in_dev->ifa_list)
+		if (r && !in_dev->ifa_list && !netif_is_l3_slave(r->dev))
 			return true;
 		/* It is possible we already removed the RIF ourselves
 		 * if it was assigned to a netdev that is now a bridge
-- 
2.7.4