RDMA/core: Support core port attributes in non init_net

Now that sysfs compatibility layer for non init_net exists, add core port
attributes such as pkey and gid table to non init_net ns.
Signed-off-by: NParav Pandit <parav@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/core/core_priv.h

@@ -336,4 +336,8 @@ int roce_resolve_route_from_path(struct sa_path_rec *rec,
 				 const struct ib_gid_attr *attr);
 
 struct net_device *rdma_read_gid_attr_ndev_rcu(const struct ib_gid_attr *attr);
+
+void ib_free_port_attrs(struct ib_core_device *coredev);
+int ib_setup_port_attrs(struct ib_core_device *coredev,
+			bool alloc_hw_stats);
 #endif /* _CORE_PRIV_H */

drivers/infiniband/core/device.c

@@ -773,6 +773,9 @@ static int add_one_compat_dev(struct ib_device *device,
 	ret = device_add(&cdev->dev);
 	if (ret)
 		goto add_err;
+	ret = ib_setup_port_attrs(cdev, false);
+	if (ret)
+		goto port_err;
 
 	ret = xa_err(xa_store(&device->compat_devs, rnet->id,
 			      cdev, GFP_KERNEL));
@@ -783,6 +786,8 @@ static int add_one_compat_dev(struct ib_device *device,
 	return 0;
 
 insert_err:
+	ib_free_port_attrs(cdev);
+port_err:
 	device_del(&cdev->dev);
 add_err:
 	put_device(&cdev->dev);
@@ -801,6 +806,7 @@ static void remove_one_compat_dev(struct ib_device *device, u32 id)
 	cdev = xa_erase(&device->compat_devs, id);
 	mutex_unlock(&device->compat_devs_mutex);
 	if (cdev) {
+		ib_free_port_attrs(cdev);
 		device_del(&cdev->dev);
 		put_device(&cdev->dev);
 	}

drivers/infiniband/core/sysfs.c

@@ -1015,7 +1015,8 @@ static void setup_hw_stats(struct ib_device *device, struct ib_port *port,
 	return;
 }
 
-static int add_port(struct ib_core_device *coredev, int port_num)
+static int add_port(struct ib_core_device *coredev,
+		    int port_num, bool alloc_stats)
 {
 	struct ib_device *device = rdma_device_to_ibdev(&coredev->dev);
 	struct ib_port *p;
@@ -1056,7 +1057,7 @@ static int add_port(struct ib_core_device *coredev, int port_num)
 		goto err_put;
 	}
 
-	if (device->ops.process_mad) {
+	if (device->ops.process_mad && alloc_stats) {
 		p->pma_table = get_counter_table(device, port_num);
 		ret = sysfs_create_group(&p->kobj, p->pma_table);
 		if (ret)
@@ -1123,7 +1124,7 @@ static int add_port(struct ib_core_device *coredev, 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 && alloc_stats)
 		setup_hw_stats(device, p, port_num);
 
 	list_add_tail(&p->kobj.entry, &coredev->port_list);
@@ -1280,7 +1281,7 @@ const struct attribute_group ib_dev_attr_group = {
 	.attrs = ib_dev_attrs,
 };
 
-static void ib_free_port_attrs(struct ib_core_device *coredev)
+void ib_free_port_attrs(struct ib_core_device *coredev)
 {
 	struct kobject *p, *t;
 
@@ -1307,7 +1308,7 @@ static void ib_free_port_attrs(struct ib_core_device *coredev)
 	kobject_put(coredev->ports_kobj);
 }
 
-static int ib_setup_port_attrs(struct ib_core_device *coredev)
+int ib_setup_port_attrs(struct ib_core_device *coredev, bool alloc_stats)
 {
 	struct ib_device *device = rdma_device_to_ibdev(&coredev->dev);
 	unsigned int port;
@@ -1319,7 +1320,7 @@ static int ib_setup_port_attrs(struct ib_core_device *coredev)
 		return -ENOMEM;
 
 	rdma_for_each_port (device, port) {
-		ret = add_port(coredev, port);
+		ret = add_port(coredev, port, alloc_stats);
 		if (ret)
 			goto err_put;
 	}
@@ -1335,7 +1336,7 @@ int ib_device_register_sysfs(struct ib_device *device)
 {
 	int ret;
 
-	ret = ib_setup_port_attrs(&device->coredev);
+	ret = ib_setup_port_attrs(&device->coredev, true);
 	if (ret)
 		return ret;