1 files changed, 73 insertions, 20 deletions

diff --git a/drivers/infiniband/core/sysfs.c b/drivers/infiniband/core/sysfs.c
index 9b6a065bdfa5..c78d0c9646ae 100644
--- a/drivers/infiniband/core/sysfs.c
+++ b/drivers/infiniband/core/sysfs.c
@@ -349,10 +349,15 @@ static struct attribute *port_default_attrs[] = {
 
 static size_t print_ndev(const struct ib_gid_attr *gid_attr, char *buf)
 {
-	if (!gid_attr->ndev)
-		return -EINVAL;
-
-	return sprintf(buf, "%s\n", gid_attr->ndev->name);
+	struct net_device *ndev;
+	size_t ret = -EINVAL;
+
+	rcu_read_lock();
+	ndev = rcu_dereference(gid_attr->ndev);
+	if (ndev)
+		ret = sprintf(buf, "%s\n", ndev->name);
+	rcu_read_unlock();
+	return ret;
 }
 
 static size_t print_gid_type(const struct ib_gid_attr *gid_attr, char *buf)
@@ -1015,8 +1020,10 @@ err_free_stats:
 	return;
 }
 
-static int add_port(struct ib_device *device, int port_num)
+static int add_port(struct ib_core_device *coredev, int port_num)
 {
+	struct ib_device *device = rdma_device_to_ibdev(&coredev->dev);
+	bool is_full_dev = &device->coredev == coredev;
 	struct ib_port *p;
 	struct ib_port_attr attr;
 	int i;
@@ -1034,7 +1041,7 @@ static int add_port(struct ib_device *device, int port_num)
 	p->port_num   = port_num;
 
 	ret = kobject_init_and_add(&p->kobj, &port_type,
-				   device->ports_kobj,
+				   coredev->ports_kobj,
 				   "%d", port_num);
 	if (ret) {
 		kfree(p);
@@ -1055,7 +1062,7 @@ static int add_port(struct ib_device *device, int port_num)
 		goto err_put;
 	}
 
-	if (device->ops.process_mad) {
+	if (device->ops.process_mad && is_full_dev) {
 		p->pma_table = get_counter_table(device, port_num);
 		ret = sysfs_create_group(&p->kobj, p->pma_table);
 		if (ret)
@@ -1111,7 +1118,7 @@ static int add_port(struct ib_device *device, int port_num)
 	if (ret)
 		goto err_free_pkey;
 
-	if (device->ops.init_port) {
+	if (device->ops.init_port && is_full_dev) {
 		ret = device->ops.init_port(device, port_num, &p->kobj);
 		if (ret)
 			goto err_remove_pkey;
@@ -1122,10 +1129,10 @@ static int add_port(struct ib_device *device, int port_num)
 	 * port, so holder should be device. Therefore skip per port conunter
 	 * initialization.
 	 */
-	if (device->ops.alloc_hw_stats && port_num)
+	if (device->ops.alloc_hw_stats && port_num && is_full_dev)
 		setup_hw_stats(device, p, port_num);
 
-	list_add_tail(&p->kobj.entry, &device->port_list);
+	list_add_tail(&p->kobj.entry, &coredev->port_list);
 
 	kobject_uevent(&p->kobj, KOBJ_ADD);
 	return 0;
@@ -1194,6 +1201,7 @@ static ssize_t node_type_show(struct device *device,
 	case RDMA_NODE_RNIC:	  return sprintf(buf, "%d: RNIC\n", dev->node_type);
 	case RDMA_NODE_USNIC:	  return sprintf(buf, "%d: usNIC\n", dev->node_type);
 	case RDMA_NODE_USNIC_UDP: return sprintf(buf, "%d: usNIC UDP\n", dev->node_type);
+	case RDMA_NODE_UNSPECIFIED: return sprintf(buf, "%d: unspecified\n", dev->node_type);
 	case RDMA_NODE_IB_SWITCH: return sprintf(buf, "%d: switch\n", dev->node_type);
 	case RDMA_NODE_IB_ROUTER: return sprintf(buf, "%d: router\n", dev->node_type);
 	default:		  return sprintf(buf, "%d: <unknown>\n", dev->node_type);
@@ -1279,11 +1287,11 @@ const struct attribute_group ib_dev_attr_group = {
 	.attrs = ib_dev_attrs,
 };
 
-static void ib_free_port_attrs(struct ib_device *device)
+void ib_free_port_attrs(struct ib_core_device *coredev)
 {
 	struct kobject *p, *t;
 
-	list_for_each_entry_safe(p, t, &device->port_list, entry) {
+	list_for_each_entry_safe(p, t, &coredev->port_list, entry) {
 		struct ib_port *port = container_of(p, struct ib_port, kobj);
 
 		list_del(&p->entry);
@@ -1303,20 +1311,22 @@ static void ib_free_port_attrs(struct ib_device *device)
 		kobject_put(p);
 	}
 
-	kobject_put(device->ports_kobj);
+	kobject_put(coredev->ports_kobj);
 }
 
-static int ib_setup_port_attrs(struct ib_device *device)
+int ib_setup_port_attrs(struct ib_core_device *coredev)
 {
+	struct ib_device *device = rdma_device_to_ibdev(&coredev->dev);
 	unsigned int port;
 	int ret;
 
-	device->ports_kobj = kobject_create_and_add("ports", &device->dev.kobj);
-	if (!device->ports_kobj)
+	coredev->ports_kobj = kobject_create_and_add("ports",
+						     &coredev->dev.kobj);
+	if (!coredev->ports_kobj)
 		return -ENOMEM;
 
 	rdma_for_each_port (device, port) {
-		ret = add_port(device, port);
+		ret = add_port(coredev, port);
 		if (ret)
 			goto err_put;
 	}
@@ -1324,7 +1334,7 @@ static int ib_setup_port_attrs(struct ib_device *device)
 	return 0;
 
 err_put:
-	ib_free_port_attrs(device);
+	ib_free_port_attrs(coredev);
 	return ret;
 }
 
@@ -1332,7 +1342,7 @@ int ib_device_register_sysfs(struct ib_device *device)
 {
 	int ret;
 
-	ret = ib_setup_port_attrs(device);
+	ret = ib_setup_port_attrs(&device->coredev);
 	if (ret)
 		return ret;
 
@@ -1348,5 +1358,48 @@ void ib_device_unregister_sysfs(struct ib_device *device)
 		free_hsag(&device->dev.kobj, device->hw_stats_ag);
 	kfree(device->hw_stats);
 
-	ib_free_port_attrs(device);
+	ib_free_port_attrs(&device->coredev);
+}
+
+/**
+ * ib_port_register_module_stat - add module counters under relevant port
+ *  of IB device.
+ *
+ * @device: IB device to add counters
+ * @port_num: valid port number
+ * @kobj: pointer to the kobject to initialize
+ * @ktype: pointer to the ktype for this kobject.
+ * @name: the name of the kobject
+ */
+int ib_port_register_module_stat(struct ib_device *device, u8 port_num,
+				 struct kobject *kobj, struct kobj_type *ktype,
+				 const char *name)
+{
+	struct kobject *p, *t;
+	int ret;
+
+	list_for_each_entry_safe(p, t, &device->coredev.port_list, entry) {
+		struct ib_port *port = container_of(p, struct ib_port, kobj);
+
+		if (port->port_num != port_num)
+			continue;
+
+		ret = kobject_init_and_add(kobj, ktype, &port->kobj, "%s",
+					   name);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(ib_port_register_module_stat);
+
+/**
+ * ib_port_unregister_module_stat - release module counters
+ * @kobj: pointer to the kobject to release
+ */
+void ib_port_unregister_module_stat(struct kobject *kobj)
+{
+	kobject_put(kobj);
 }
+EXPORT_SYMBOL(ib_port_unregister_module_stat);