static int __init iscsi_target_init_module()

in iscsi/iscsi_target.c [683:766]

• 72 lines of code
• 10 McCabe index (conditional complexity)

static int __init iscsi_target_init_module(void)
{
	int ret = 0, size;

	pr_debug("iSCSI-Target "ISCSIT_VERSION"\n");
	iscsit_global = kzalloc(sizeof(*iscsit_global), GFP_KERNEL);
	if (!iscsit_global)
		return -1;

	spin_lock_init(&iscsit_global->ts_bitmap_lock);
	mutex_init(&auth_id_lock);
	idr_init(&tiqn_idr);

	ret = target_register_template(&iscsi_ops);
	if (ret)
		goto out;

	size = BITS_TO_LONGS(ISCSIT_BITMAP_BITS) * sizeof(long);
	iscsit_global->ts_bitmap = vzalloc(size);
	if (!iscsit_global->ts_bitmap)
		goto configfs_out;

	lio_qr_cache = kmem_cache_create("lio_qr_cache",
			sizeof(struct iscsi_queue_req),
			__alignof__(struct iscsi_queue_req), 0, NULL);
	if (!lio_qr_cache) {
		pr_err("Unable to kmem_cache_create() for"
				" lio_qr_cache\n");
		goto bitmap_out;
	}

	lio_dr_cache = kmem_cache_create("lio_dr_cache",
			sizeof(struct iscsi_datain_req),
			__alignof__(struct iscsi_datain_req), 0, NULL);
	if (!lio_dr_cache) {
		pr_err("Unable to kmem_cache_create() for"
				" lio_dr_cache\n");
		goto qr_out;
	}

	lio_ooo_cache = kmem_cache_create("lio_ooo_cache",
			sizeof(struct iscsi_ooo_cmdsn),
			__alignof__(struct iscsi_ooo_cmdsn), 0, NULL);
	if (!lio_ooo_cache) {
		pr_err("Unable to kmem_cache_create() for"
				" lio_ooo_cache\n");
		goto dr_out;
	}

	lio_r2t_cache = kmem_cache_create("lio_r2t_cache",
			sizeof(struct iscsi_r2t), __alignof__(struct iscsi_r2t),
			0, NULL);
	if (!lio_r2t_cache) {
		pr_err("Unable to kmem_cache_create() for"
				" lio_r2t_cache\n");
		goto ooo_out;
	}

	iscsit_register_transport(&iscsi_target_transport);

	if (iscsit_load_discovery_tpg() < 0)
		goto r2t_out;

	return ret;
r2t_out:
	iscsit_unregister_transport(&iscsi_target_transport);
	kmem_cache_destroy(lio_r2t_cache);
ooo_out:
	kmem_cache_destroy(lio_ooo_cache);
dr_out:
	kmem_cache_destroy(lio_dr_cache);
qr_out:
	kmem_cache_destroy(lio_qr_cache);
bitmap_out:
	vfree(iscsit_global->ts_bitmap);
configfs_out:
	/* XXX: this probably wants it to be it's own unwind step.. */
	if (iscsit_global->discovery_tpg)
		iscsit_tpg_disable_portal_group(iscsit_global->discovery_tpg, 1);
	target_unregister_template(&iscsi_ops);
out:
	kfree(iscsit_global);
	return -ENOMEM;
}