static int gve_reg_xdp_info()

in build/gve_main.c [1391:1448]

• 53 lines of code
• 13 McCabe index (conditional complexity)

static int gve_reg_xdp_info(struct gve_priv *priv, struct net_device *dev)
{
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,14,0)) || defined(KUNIT_KERNEL)
	struct napi_struct *napi;
	struct gve_rx_ring *rx;
	int err = 0;
	int i, j;
	u32 tx_qid;

	if (!priv->num_xdp_queues)
		return 0;

	for (i = 0; i < priv->rx_cfg.num_queues; i++) {
		rx = &priv->rx[i];
		napi = &priv->ntfy_blocks[rx->ntfy_id].napi;

		err = xdp_rxq_info_reg(&rx->xdp_rxq, dev, i,
				       napi->napi_id);
		if (err)
			goto err;
		err = xdp_rxq_info_reg_mem_model(&rx->xdp_rxq,
						 MEM_TYPE_PAGE_SHARED, NULL);
		if (err)
			goto err;
		rx->xsk_pool = xsk_get_pool_from_qid(dev, i);
		if (rx->xsk_pool) {
			err = xdp_rxq_info_reg(&rx->xsk_rxq, dev, i,
					       napi->napi_id);
			if (err)
				goto err;
			err = xdp_rxq_info_reg_mem_model(&rx->xsk_rxq,
							 MEM_TYPE_XSK_BUFF_POOL, NULL);
			if (err)
				goto err;
			xsk_pool_set_rxq_info(rx->xsk_pool,
					      &rx->xsk_rxq);
		}
	}

	for (i = 0; i < priv->num_xdp_queues; i++) {
		tx_qid = gve_xdp_tx_queue_id(priv, i);
		priv->tx[tx_qid].xsk_pool = xsk_get_pool_from_qid(dev, i);
	}
	return 0;

err:
	for (j = i; j >= 0; j--) {
		rx = &priv->rx[j];
		if (xdp_rxq_info_is_reg(&rx->xdp_rxq))
			xdp_rxq_info_unreg(&rx->xdp_rxq);
		if (xdp_rxq_info_is_reg(&rx->xsk_rxq))
			xdp_rxq_info_unreg(&rx->xsk_rxq);
	}
	return err;
#else /* (LINUX_VERSION_CODE >= KERNEL_VERSION(5,14,0)) || defined(KUNIT_KERNEL) */
	return 0;
#endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(5,14,0)) || defined(KUNIT_KERNEL) */
}