[PATCH net-next v2 4/6] net/x25: support NETDEV_CHANGE notifier

Martin Schiller
2020-11-16T13:55:24Z

This makes it possible to handle carrier lost and detection.
In case of carrier lost, we shutdown layer 3 and flush all sessions.

Signed-off-by: Martin Schiller <ms@dev.tdt.de>
---

Change from v1:
fix 'subject_prefix' and 'checkpatch' warnings

---
net/x25/af_x25.c | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index 25726120fcc7..6a95ca11694e 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -275,6 +275,19 @@ static int x25_device_event(struct notifier_block *this, unsigned long event,
dev->name);
x25_link_device_remove(dev);
break;
+ case NETDEV_CHANGE:
+ pr_debug("X.25: got event NETDEV_CHANGE for device: %s\n",
+ dev->name);
+ if (!netif_carrier_ok(dev)) {
+ pr_debug("X.25: Carrier lost -> set link state down: %s\n",
+ dev->name);
+ nb = x25_get_neigh(dev);
+ if (nb) {
+ x25_link_terminated(nb);
+ x25_neigh_put(nb);
+ }
+ }
+ break;
}
}

--
2.20.1