#include "virtio-net.h"
#include "vhost_net.h"
+#include "qemu-error.h"
#include "config.h"
#ifdef CONFIG_VHOST_NET
#include <linux/vhost.h>
-#include <sys/eventfd.h>
#include <sys/socket.h>
#include <linux/kvm.h>
#include <fcntl.h>
if (!(net->dev.features & (1 << VIRTIO_RING_F_INDIRECT_DESC))) {
features &= ~(1 << VIRTIO_RING_F_INDIRECT_DESC);
}
- features &= ~(1 << VIRTIO_NET_F_MRG_RXBUF);
+ if (!(net->dev.features & (1 << VIRTIO_RING_F_EVENT_IDX))) {
+ features &= ~(1 << VIRTIO_RING_F_EVENT_IDX);
+ }
+ if (!(net->dev.features & (1 << VIRTIO_NET_F_MRG_RXBUF))) {
+ features &= ~(1 << VIRTIO_NET_F_MRG_RXBUF);
+ }
return features;
}
if (features & (1 << VIRTIO_RING_F_INDIRECT_DESC)) {
net->dev.acked_features |= (1 << VIRTIO_RING_F_INDIRECT_DESC);
}
+ if (features & (1 << VIRTIO_RING_F_EVENT_IDX)) {
+ net->dev.acked_features |= (1 << VIRTIO_RING_F_EVENT_IDX);
+ }
+ if (features & (1 << VIRTIO_NET_F_MRG_RXBUF)) {
+ net->dev.acked_features |= (1 << VIRTIO_NET_F_MRG_RXBUF);
+ }
}
static int vhost_net_get_fd(VLANClientState *backend)
}
}
-struct vhost_net *vhost_net_init(VLANClientState *backend, int devfd)
+struct vhost_net *vhost_net_init(VLANClientState *backend, int devfd,
+ bool force)
{
int r;
struct vhost_net *net = qemu_malloc(sizeof *net);
(1 << VHOST_NET_F_VIRTIO_NET_HDR);
net->backend = r;
- r = vhost_dev_init(&net->dev, devfd);
+ r = vhost_dev_init(&net->dev, devfd, force);
if (r < 0) {
goto fail;
}
+ if (!tap_has_vnet_hdr_len(backend,
+ sizeof(struct virtio_net_hdr_mrg_rxbuf))) {
+ net->dev.features &= ~(1 << VIRTIO_NET_F_MRG_RXBUF);
+ }
if (~net->dev.features & net->dev.backend_features) {
fprintf(stderr, "vhost lacks feature mask %" PRIu64 " for backend\n",
- ~net->dev.features & net->dev.backend_features);
+ (uint64_t)(~net->dev.features & net->dev.backend_features));
vhost_dev_cleanup(&net->dev);
goto fail;
}
return NULL;
}
+bool vhost_net_query(VHostNetState *net, VirtIODevice *dev)
+{
+ return vhost_dev_query(&net->dev, dev);
+}
+
int vhost_net_start(struct vhost_net *net,
VirtIODevice *dev)
{
struct vhost_vring_file file = { };
int r;
+ if (net->dev.acked_features & (1 << VIRTIO_NET_F_MRG_RXBUF)) {
+ tap_set_vnet_hdr_len(net->vc,
+ sizeof(struct virtio_net_hdr_mrg_rxbuf));
+ }
net->dev.nvqs = 2;
net->dev.vqs = net->vqs;
return 0;
fail:
file.fd = -1;
- while (--file.index >= 0) {
+ while (file.index-- > 0) {
int r = ioctl(net->dev.control, VHOST_NET_SET_BACKEND, &file);
assert(r >= 0);
}
net->vc->info->poll(net->vc, true);
vhost_dev_stop(&net->dev, dev);
+ if (net->dev.acked_features & (1 << VIRTIO_NET_F_MRG_RXBUF)) {
+ tap_set_vnet_hdr_len(net->vc, sizeof(struct virtio_net_hdr));
+ }
return r;
}
}
net->vc->info->poll(net->vc, true);
vhost_dev_stop(&net->dev, dev);
+ if (net->dev.acked_features & (1 << VIRTIO_NET_F_MRG_RXBUF)) {
+ tap_set_vnet_hdr_len(net->vc, sizeof(struct virtio_net_hdr));
+ }
}
void vhost_net_cleanup(struct vhost_net *net)
{
vhost_dev_cleanup(&net->dev);
+ if (net->dev.acked_features & (1 << VIRTIO_NET_F_MRG_RXBUF)) {
+ tap_set_vnet_hdr_len(net->vc, sizeof(struct virtio_net_hdr));
+ }
qemu_free(net);
}
#else
-struct vhost_net *vhost_net_init(VLANClientState *backend, int devfd)
+struct vhost_net *vhost_net_init(VLANClientState *backend, int devfd,
+ bool force)
+{
+ error_report("vhost-net support is not compiled in");
+ return NULL;
+}
+
+bool vhost_net_query(VHostNetState *net, VirtIODevice *dev)
{
- return NULL;
+ return false;
}
int vhost_net_start(struct vhost_net *net,
VirtIODevice *dev)
{
- return -ENOSYS;
+ return -ENOSYS;
}
void vhost_net_stop(struct vhost_net *net,
VirtIODevice *dev)
unsigned vhost_net_get_features(struct vhost_net *net, unsigned features)
{
- return features;
+ return features;
}
void vhost_net_ack_features(struct vhost_net *net, unsigned features)
{