drbd: Add struct drbd_device->resource

Signed-off-by: Andreas Gruenbacher <agruen@linbit.com>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>

drivers/block/drbd/drbd_int.h

@@ -631,6 +631,7 @@ struct drbd_peer_device {
 };
 
 struct drbd_device {
+	struct drbd_resource *resource;
 	struct list_head peer_devices;
 	int vnr;			/* volume number within the connection */
 	struct kref kref;

drivers/block/drbd/drbd_main.c

@@ -2681,6 +2681,7 @@ enum drbd_ret_code drbd_create_minor(struct drbd_connection *connection, unsigne
 	INIT_LIST_HEAD(&device->peer_devices);
 	list_add(&peer_device->peer_devices, &device->peer_devices);
 	kref_get(&connection->kref);
+	device->resource = connection->resource;
 	peer_device->connection = connection;
 	peer_device->device = device;
 

drivers/block/drbd/drbd_nl.c

@@ -251,7 +251,7 @@ static int drbd_adm_prepare(struct sk_buff *skb, struct genl_info *info,
 	    first_peer_device(adm_ctx.device)->connection != adm_ctx.connection) {
 		pr_warning("request: minor=%u, resource=%s; but that minor belongs to connection %s\n",
 				adm_ctx.minor, adm_ctx.resource_name,
-				first_peer_device(adm_ctx.device)->connection->resource->name);
+				adm_ctx.device->resource->name);
 		drbd_msg_put_info("minor exists in different resource");
 		return ERR_INVALID_REQUEST;
 	}
@@ -261,7 +261,7 @@ static int drbd_adm_prepare(struct sk_buff *skb, struct genl_info *info,
 		pr_warning("request: minor=%u, volume=%u; but that minor is volume %u in %s\n",
 				adm_ctx.minor, adm_ctx.volume,
 				adm_ctx.device->vnr,
-				first_peer_device(adm_ctx.device)->connection->resource->name);
+				adm_ctx.device->resource->name);
 		drbd_msg_put_info("minor exists as different volume");
 		return ERR_INVALID_REQUEST;
 	}