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author | Gautam Dawar <gautam.dawar@xilinx.com> | 2022-03-30 23:33:58 +0530 |
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committer | Michael S. Tsirkin <mst@redhat.com> | 2022-05-31 12:45:08 -0400 |
commit | cfe226892913a448e83e7a19db93862baa3cb99c (patch) | |
tree | 0b29b48b76c091b16bd2f78c65884a0bcb1ab0f6 /drivers/vdpa/vdpa_sim | |
parent | ec103d983bb56037a147dcdd9798cfa4fcdab126 (diff) | |
download | linux-stable-cfe226892913a448e83e7a19db93862baa3cb99c.tar.gz linux-stable-cfe226892913a448e83e7a19db93862baa3cb99c.tar.bz2 linux-stable-cfe226892913a448e83e7a19db93862baa3cb99c.zip |
vdpa_sim: filter destination mac address
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>
Diffstat (limited to 'drivers/vdpa/vdpa_sim')
-rw-r--r-- | drivers/vdpa/vdpa_sim/vdpa_sim_net.c | 49 |
1 files changed, 31 insertions, 18 deletions
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c index f4607172b0b8..5fa59d4fddc8 100644 --- a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c +++ b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c @@ -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); |