device: gracefully handle device names exceeding IFNAMESIZ

Instead of truncating the device name when it exceeds IFNAMSIZ length;
let device_set_ifname return an error code and do not add the device
to the device list.
This avoids possible issues with device names becoming identical due the
truncation and as a result unexpected behavior.
Further let the different device types gracefully handle the error code
returned by device_init

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/veth.c b/veth.c
index e109f27..eafa4cf 100644
--- a/veth.c
+++ b/veth.c
@@ -218,7 +218,12 @@ veth_create(const char *name, struct device_type *devtype,
 		return NULL;
 
 	dev = &veth->dev;
-	device_init(dev, devtype, name);
+	if (device_init(dev, devtype, name) < 0) {
+		device_cleanup(dev);
+		free(veth);
+		return NULL;
+	}
+
 	dev->config_pending = true;
 
 	veth->set_state = dev->set_state;