[PATCH RFC v2 for-next 7/7] RDMA/core: report link status when register and deregister ib device

[Weihang Li <liweihang@xxxxxxxxxx>]

From: Lang Cheng <chenglang@xxxxxxxxxx>

Support send link active event for every port of ib device except bonding
backup port when ib device is being registered or deregistered.

Signed-off-by: Lang Cheng <chenglang@xxxxxxxxxx>
---
 drivers/infiniband/core/device.c | 44 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index 0427a4d..6cdfffa 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -1341,6 +1341,7 @@ static int enable_device_and_get(struct ib_device *device)
  */
 int ib_register_device(struct ib_device *device, const char *name)
 {
+	unsigned int port;
 	int ret;
 
 	ret = assign_name(device, name);
@@ -1405,6 +1406,28 @@ int ib_register_device(struct ib_device *device, const char *name)
 	}
 	ib_device_put(device);
 
+	rdma_for_each_port(device, port) {
+		struct net_device *netdev = ib_device_get_netdev(device, port);
+		enum ib_port_state port_state;
+		struct ib_event event;
+
+		/* not every port has a netdevice */
+		if (!netdev ||
+		    ib_get_cached_port_inactive_status(device, port))
+			continue;
+
+		ib_get_cached_port_state(device, port, &port_state);
+		if (port_state != IB_PORT_ACTIVE)
+			continue;
+
+		event.device = device;
+		event.event = IB_EVENT_PORT_ACTIVE;
+		event.element.port_num = port;
+		ib_dispatch_event(&event);
+		ibdev_dbg(device, "init event %s\n",
+			  ib_event_msg(event.event));
+	}
+
 	return 0;
 
 dev_cleanup:
@@ -1469,6 +1492,27 @@ static void __ib_unregister_device(struct ib_device *ib_dev)
  */
 void ib_unregister_device(struct ib_device *ib_dev)
 {
+	unsigned int port;
+
+	rdma_for_each_port(ib_dev, port) {
+		enum ib_port_state port_state;
+		struct ib_event event;
+
+		if (ib_get_cached_port_inactive_status(ib_dev, port))
+			continue;
+
+		ib_get_cached_port_state(ib_dev, port, &port_state);
+		if (port_state != IB_PORT_ACTIVE)
+			continue;
+
+		event.device = ib_dev;
+		event.event = IB_EVENT_PORT_ERR;
+		event.element.port_num = port;
+		ib_dispatch_event(&event);
+		ibdev_dbg(ib_dev, "init event %s\n",
+			  ib_event_msg(event.event));
+	}
+
 	get_device(&ib_dev->dev);
 	__ib_unregister_device(ib_dev);
 	put_device(&ib_dev->dev);
-- 
2.8.1