Restore disable_ipv6 sysctl after removing a device from bridge or bond

If a device is added to a bond or bridge, the disable_ipv6 sysctl is
set, so that no link local addresses are present on the slave devices.

However, the disable_ipv6 sysctl is not restored after removing the
device from the bridge or bond. Therefore, no IPv6 link local addresses
are added and autoconfiguration does not work.

Set the disable_ipv6 to '0' on device removal from bridge or bond.

Signed-off-by: Fabian Bläse <fabian@blaese.de>
Link: https://github.com/openwrt/netifd/pull/40
Signed-off-by: Robert Marko <robimarko@gmail.com>

2 files changed, 10 insertions, 0 deletions

diff --git a/bonding.c b/bonding.c
index 00a7b28..fef18f3 100644
--- a/bonding.c
+++ b/bonding.c
@@ -171,6 +171,11 @@ bonding_disable_port(struct bonding_port *bp, bool keep_dev)
 	if (!keep_dev)
 		device_release(&bp->dev);
 
+	if (bp->dev.dev->settings.flags & DEV_OPT_IPV6) {
+		bp->dev.dev->settings.ipv6 = 1;
+		bp->dev.dev->settings.flags &= ~DEV_OPT_IPV6;
+	}
+
 	return 0;
 }
 
diff --git a/bridge.c b/bridge.c
index 2128ec7..70ece78 100644
--- a/bridge.c
+++ b/bridge.c
@@ -327,6 +327,11 @@ bridge_disable_member(struct bridge_member *bm, bool keep_dev)
 	if (!keep_dev)
 		device_release(&bm->dev);
 
+	if (bm->dev.dev->settings.flags & DEV_OPT_IPV6) {
+		bm->dev.dev->settings.ipv6 = 1;
+		bm->dev.dev->settings.flags &= ~DEV_OPT_IPV6;
+	}
+
 	device_broadcast_event(&bst->dev, DEV_EVENT_TOPO_CHANGE);
 
 	return 0;