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virtio-net: support longer header

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virtio-1 devices always use num_buffers in the header, even if
mergeable rx buffers have not been negotiated.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Cornelia Huck 2015-06-04 12:34:17 +02:00 committed by Michael S. Tsirkin
parent b6a3cddb22
commit bb9d17f831
1 changed files with 15 additions and 6 deletions
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21
hw/net/virtio-net.c
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@ -367,15 +367,21 @@ static int peer_has_ufo(VirtIONet *n)
return n->has_ufo;
}
static void virtio_net_set_mrg_rx_bufs(VirtIONet *n, int mergeable_rx_bufs)
static void virtio_net_set_mrg_rx_bufs(VirtIONet *n, int mergeable_rx_bufs,
int version_1)
{
int i;
NetClientState *nc;
n->mergeable_rx_bufs = mergeable_rx_bufs;
n->guest_hdr_len = n->mergeable_rx_bufs ?
sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr);
if (version_1) {
n->guest_hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
} else {
n->guest_hdr_len = n->mergeable_rx_bufs ?
sizeof(struct virtio_net_hdr_mrg_rxbuf) :
sizeof(struct virtio_net_hdr);
}
for (i = 0; i < n->max_queues; i++) {
nc = qemu_get_subqueue(n->nic, i);
@ -522,7 +528,9 @@ static void virtio_net_set_features(VirtIODevice *vdev, uint64_t features)
virtio_net_set_mrg_rx_bufs(n,
__virtio_has_feature(features,
VIRTIO_NET_F_MRG_RXBUF));
VIRTIO_NET_F_MRG_RXBUF),
__virtio_has_feature(features,
VIRTIO_F_VERSION_1));
if (n->has_vnet_hdr) {
n->curr_guest_offloads =
@ -1375,7 +1383,8 @@ static int virtio_net_load_device(VirtIODevice *vdev, QEMUFile *f,
qemu_get_buffer(f, n->mac, ETH_ALEN);
n->vqs[0].tx_waiting = qemu_get_be32(f);
virtio_net_set_mrg_rx_bufs(n, qemu_get_be32(f));
virtio_net_set_mrg_rx_bufs(n, qemu_get_be32(f),
virtio_has_feature(vdev, VIRTIO_F_VERSION_1));
if (version_id >= 3)
n->status = qemu_get_be16(f);
@ -1627,7 +1636,7 @@ static void virtio_net_device_realize(DeviceState *dev, Error **errp)
n->vqs[0].tx_waiting = 0;
n->tx_burst = n->net_conf.txburst;
virtio_net_set_mrg_rx_bufs(n, 0);
virtio_net_set_mrg_rx_bufs(n, 0, 0);
n->promisc = 1; /* for compatibility */
n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN);