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| author | Michael S. Tsirkin <mst@redhat.com> | 2010-07-16 11:43:43 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2010-09-07 20:27:42 +0300 |
| commit | ca736c8e748e3bf77abe401231a412b9cdccb9d3 (patch) | |
| tree | 2161f93d2ca57c24e44e68306d928c0c49599171 /hw | |
| parent | 445d892f43e6a6031cd1aac292df433f821aa830 (diff) | |
| download | qemu-ca736c8e748e3bf77abe401231a412b9cdccb9d3.zip qemu-ca736c8e748e3bf77abe401231a412b9cdccb9d3.tar.gz qemu-ca736c8e748e3bf77abe401231a412b9cdccb9d3.tar.bz2 | |
vhost_net: mergeable buffers support
use the new tap APIs to set header length
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/vhost_net.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/hw/vhost_net.c b/hw/vhost_net.c index 0c00de2..4a7b819 100644 --- a/hw/vhost_net.c +++ b/hw/vhost_net.c @@ -50,7 +50,9 @@ unsigned vhost_net_get_features(struct vhost_net *net, unsigned features) 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_NET_F_MRG_RXBUF))) { + features &= ~(1 << VIRTIO_NET_F_MRG_RXBUF); + } return features; } @@ -63,6 +65,9 @@ void vhost_net_ack_features(struct vhost_net *net, unsigned features) if (features & (1 << VIRTIO_RING_F_INDIRECT_DESC)) { net->dev.acked_features |= (1 << VIRTIO_RING_F_INDIRECT_DESC); } + 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) @@ -97,6 +102,10 @@ struct vhost_net *vhost_net_init(VLANClientState *backend, int devfd) 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", (uint64_t)(~net->dev.features & net->dev.backend_features)); @@ -117,6 +126,10 @@ int vhost_net_start(struct vhost_net *net, { 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; @@ -144,6 +157,9 @@ fail: } 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; } @@ -158,11 +174,17 @@ void vhost_net_stop(struct vhost_net *net, } 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 |