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vdpa_sim: filter destination mac address

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This patch implements a simple unicast filter for vDPA simulator.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-19-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Gautam Dawar 2022-03-30 23:33:58 +05:30 committed by Michael S. Tsirkin
parent ec103d983b
commit cfe2268929
1 changed files with 31 additions and 18 deletions
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49
drivers/vdpa/vdpa_sim/vdpa_sim_net.c
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@ -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;
}
write = vringh_iov_push_iotlb(&rxq->vring, &rxq->in_iov,
vdpasim->buffer, read);
if (write <= 0)
break;
vdpasim_net_complete(txq, 0);
vdpasim_net_complete(rxq, total_write);
vdpasim_net_complete(rxq, write);
if (++pkts > 4) {
schedule_work(&vdpasim->work);