v4.19.13 snapshot.
diff --git a/net/hsr/hsr_main.c b/net/hsr/hsr_main.c
new file mode 100644
index 0000000..cd37d00
--- /dev/null
+++ b/net/hsr/hsr_main.c
@@ -0,0 +1,136 @@
+/* Copyright 2011-2014 Autronica Fire and Security AS
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * Author(s):
+ * 2011-2014 Arvid Brodin, arvid.brodin@alten.se
+ */
+
+#include <linux/netdevice.h>
+#include <linux/rculist.h>
+#include <linux/timer.h>
+#include <linux/etherdevice.h>
+#include "hsr_main.h"
+#include "hsr_device.h"
+#include "hsr_netlink.h"
+#include "hsr_framereg.h"
+#include "hsr_slave.h"
+
+
+static int hsr_netdev_notify(struct notifier_block *nb, unsigned long event,
+ void *ptr)
+{
+ struct net_device *dev;
+ struct hsr_port *port, *master;
+ struct hsr_priv *hsr;
+ int mtu_max;
+ int res;
+
+ dev = netdev_notifier_info_to_dev(ptr);
+ port = hsr_port_get_rtnl(dev);
+ if (port == NULL) {
+ if (!is_hsr_master(dev))
+ return NOTIFY_DONE; /* Not an HSR device */
+ hsr = netdev_priv(dev);
+ port = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
+ if (port == NULL) {
+ /* Resend of notification concerning removed device? */
+ return NOTIFY_DONE;
+ }
+ } else {
+ hsr = port->hsr;
+ }
+
+ switch (event) {
+ case NETDEV_UP: /* Administrative state DOWN */
+ case NETDEV_DOWN: /* Administrative state UP */
+ case NETDEV_CHANGE: /* Link (carrier) state changes */
+ hsr_check_carrier_and_operstate(hsr);
+ break;
+ case NETDEV_CHANGEADDR:
+ if (port->type == HSR_PT_MASTER) {
+ /* This should not happen since there's no
+ * ndo_set_mac_address() for HSR devices - i.e. not
+ * supported.
+ */
+ break;
+ }
+
+ master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
+
+ if (port->type == HSR_PT_SLAVE_A) {
+ ether_addr_copy(master->dev->dev_addr, dev->dev_addr);
+ call_netdevice_notifiers(NETDEV_CHANGEADDR, master->dev);
+ }
+
+ /* Make sure we recognize frames from ourselves in hsr_rcv() */
+ port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B);
+ res = hsr_create_self_node(&hsr->self_node_db,
+ master->dev->dev_addr,
+ port ?
+ port->dev->dev_addr :
+ master->dev->dev_addr);
+ if (res)
+ netdev_warn(master->dev,
+ "Could not update HSR node address.\n");
+ break;
+ case NETDEV_CHANGEMTU:
+ if (port->type == HSR_PT_MASTER)
+ break; /* Handled in ndo_change_mtu() */
+ mtu_max = hsr_get_max_mtu(port->hsr);
+ master = hsr_port_get_hsr(port->hsr, HSR_PT_MASTER);
+ master->dev->mtu = mtu_max;
+ break;
+ case NETDEV_UNREGISTER:
+ hsr_del_port(port);
+ break;
+ case NETDEV_PRE_TYPE_CHANGE:
+ /* HSR works only on Ethernet devices. Refuse slave to change
+ * its type.
+ */
+ return NOTIFY_BAD;
+ }
+
+ return NOTIFY_DONE;
+}
+
+
+struct hsr_port *hsr_port_get_hsr(struct hsr_priv *hsr, enum hsr_port_type pt)
+{
+ struct hsr_port *port;
+
+ hsr_for_each_port(hsr, port)
+ if (port->type == pt)
+ return port;
+ return NULL;
+}
+
+static struct notifier_block hsr_nb = {
+ .notifier_call = hsr_netdev_notify, /* Slave event notifications */
+};
+
+
+static int __init hsr_init(void)
+{
+ int res;
+
+ BUILD_BUG_ON(sizeof(struct hsr_tag) != HSR_HLEN);
+
+ register_netdevice_notifier(&hsr_nb);
+ res = hsr_netlink_init();
+
+ return res;
+}
+
+static void __exit hsr_exit(void)
+{
+ unregister_netdevice_notifier(&hsr_nb);
+ hsr_netlink_exit();
+}
+
+module_init(hsr_init);
+module_exit(hsr_exit);
+MODULE_LICENSE("GPL");