linux-kernel - [PATCH 3.16 256/305] batman-adv: Clean up untagged vlan when destroying via rtnl-link

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Message-ID: <lsq.1471110171.410626273@decadent.org.uk>
Date:	Sat, 13 Aug 2016 18:42:51 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "Antonio Quartulli" <a@...table.cc>,
	"David S. Miller" <davem@...emloft.net>,
	"Sven Eckelmann" <sven@...fation.org>,
	"Marek Lindner" <mareklindner@...mailbox.ch>
Subject: [PATCH 3.16 256/305] batman-adv: Clean up untagged vlan when
 destroying via rtnl-link

3.16.37-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Sven Eckelmann <sven@...fation.org>

commit 420cb1b764f9169c5d2601b4af90e4a1702345ee upstream.

The untagged vlan object is only destroyed when the interface is removed
via the legacy sysfs interface. But it also has to be destroyed when the
standard rtnl-link interface is used.

Fixes: 5d2c05b21337 ("batman-adv: add per VLAN interface attribute framework")
Signed-off-by: Sven Eckelmann <sven@...fation.org>
Acked-by: Antonio Quartulli <a@...table.cc>
Signed-off-by: Marek Lindner <mareklindner@...mailbox.ch>
Signed-off-by: David S. Miller <davem@...emloft.net>
[bwh: Backported to 3.16: s/_put/_free_ref/]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 net/batman-adv/soft-interface.c | 9 +++++++++
 1 file changed, 9 insertions(+)

--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -975,7 +975,9 @@ void batadv_softif_destroy_sysfs(struct
 static void batadv_softif_destroy_netlink(struct net_device *soft_iface,
 					  struct list_head *head)
 {
+	struct batadv_priv *bat_priv = netdev_priv(soft_iface);
 	struct batadv_hard_iface *hard_iface;
+	struct batadv_softif_vlan *vlan;
 
 	list_for_each_entry(hard_iface, &batadv_hardif_list, list) {
 		if (hard_iface->soft_iface == soft_iface)
@@ -983,6 +985,13 @@ static void batadv_softif_destroy_netlin
 							BATADV_IF_CLEANUP_KEEP);
 	}
 
+	/* destroy the "untagged" VLAN */
+	vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
+	if (vlan) {
+		batadv_softif_destroy_vlan(bat_priv, vlan);
+		batadv_softif_vlan_free_ref(vlan);
+	}
+
 	batadv_sysfs_del_meshif(soft_iface);
 	unregister_netdevice_queue(soft_iface, head);
 }