Set core's rotational field during core addition

Check if the backend device added to the cache is an HDD or not
during core addition so it would be done once.
Update OCF
Remove whitespace

Signed-off-by: Slawomir Jankowski <slawomir.jankowski@intel.com>

modules/cas_cache/layer_cache_management.c

@@ -1155,7 +1155,7 @@ static int cache_mngt_update_core_uuid(ocf_cache_t cache, const char *core_name,
 	bdvol = bd_object(vol);
 
 	/* lookup block device object for device pointed by uuid */
-	bdev =  CAS_LOOKUP_BDEV(uuid->data);
+	bdev = CAS_LOOKUP_BDEV(uuid->data);
 	if (IS_ERR(bdev)) {
 		printk(KERN_ERR "failed to lookup bdev%s\n", (char*)uuid->data);
 		return -ENODEV;
@@ -1224,6 +1224,20 @@ static void _cache_mngt_add_core_complete(ocf_cache_t cache,
 
 static void _cache_mngt_remove_core_complete(void *priv, int error);
 
+static void _blockdev_set_rotational_property(ocf_core_t core)
+{
+	struct block_device *bdev;
+	struct request_queue *q;
+	char holder[] = "CHECK CORE ROTATIONAL\n";
+	const ocf_uuid_t core_uuid = (const ocf_uuid_t)ocf_core_get_uuid(core);
+	const char *core_path = (const char*)core_uuid->data;
+
+	bdev = blkdev_get_by_path(core_path, (FMODE_READ), holder);
+	q = bdev_get_queue(bdev);
+
+	ocf_core_set_rotational(core, (uint8_t)(!blk_queue_nonrot(q)));
+}
+
 int cache_mngt_add_core_to_cache(const char *cache_name, size_t name_len,
 		struct ocf_mngt_core_config *cfg,
 		struct kcas_insert_core *cmd_info)
@@ -1301,6 +1315,7 @@ int cache_mngt_add_core_to_cache(const char *cache_name, size_t name_len,
 	ocf_mngt_cache_put(cache);
 
 	_cache_mngt_log_core_device_path(core);
+	_blockdev_set_rotational_property(core);
 
 	return 0;