Commit cfe22689 authored by Gautam Dawar's avatar Gautam Dawar Committed by Michael S. Tsirkin
Browse files

vdpa_sim: filter destination mac address 



This patch implements a simple unicast filter for vDPA simulator.

Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarGautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-19-gdawar@xilinx.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent ec103d98

drivers/vdpa/vdpa_sim/vdpa_sim_net.c

+31 −18
Original line number Diff line number Diff line
@@ -47,13 +47,28 @@ static void vdpasim_net_complete(struct vdpasim_virtqueue *vq, size_t len) 
	local_bh_enable();

}



static bool receive_filter(struct vdpasim *vdpasim, size_t len)

{

	bool modern = vdpasim->features & (1ULL << VIRTIO_F_VERSION_1);

	size_t hdr_len = modern ? sizeof(struct virtio_net_hdr_v1) :

				  sizeof(struct virtio_net_hdr);

	struct virtio_net_config *vio_config = vdpasim->config;



	if (len < ETH_ALEN + hdr_len)

		return false;



	if (!strncmp(vdpasim->buffer + hdr_len, vio_config->mac, ETH_ALEN))

		return true;



	return false;

}



static void vdpasim_net_work(struct work_struct *work)

{

	struct vdpasim *vdpasim = container_of(work, struct vdpasim, work);

	struct vdpasim_virtqueue *txq = &vdpasim->vqs[1];

	struct vdpasim_virtqueue *rxq = &vdpasim->vqs[0];

	ssize_t read, write;

	size_t total_write;

	int pkts = 0;

	int err;
@@ -66,36 +81,34 @@ static void vdpasim_net_work(struct work_struct *work) 
		goto out;



	while (true) {

		total_write = 0;

		err = vringh_getdesc_iotlb(&txq->vring, &txq->out_iov, NULL,

					   &txq->head, GFP_ATOMIC);

		if (err <= 0)

			break;



		read = vringh_iov_pull_iotlb(&txq->vring, &txq->out_iov,

					     vdpasim->buffer,

					     PAGE_SIZE);



		if (!receive_filter(vdpasim, read)) {

			vdpasim_net_complete(txq, 0);

			continue;

		}



		err = vringh_getdesc_iotlb(&rxq->vring, NULL, &rxq->in_iov,

					   &rxq->head, GFP_ATOMIC);

		if (err <= 0) {

			vringh_complete_iotlb(&txq->vring, txq->head, 0);

			vdpasim_net_complete(txq, 0);

			break;

		}



		while (true) {

			read = vringh_iov_pull_iotlb(&txq->vring, &txq->out_iov,

						     vdpasim->buffer,

						     PAGE_SIZE);

			if (read <= 0)

				break;



		write = vringh_iov_push_iotlb(&rxq->vring, &rxq->in_iov,

					      vdpasim->buffer, read);

		if (write <= 0)

			break;



			total_write += write;

		}



		vdpasim_net_complete(txq, 0);

		vdpasim_net_complete(rxq, total_write);

		vdpasim_net_complete(rxq, write);



		if (++pkts > 4) {

			schedule_work(&vdpasim->work);