From 155fb051f5c432cfa41b63d071cfc26800a81435 Mon Sep 17 00:00:00 2001 From: Xiao Wang Date: Tue, 7 Jul 2015 09:18:33 +0200 Subject: [PATCH 059/100] virtio-net: support longer header Message-id: <1436260751-25015-31-git-send-email-jasowang@redhat.com> Patchwork-id: 66805 O-Subject: [RHEL7.2 qemu-kvm-rhev PATCH V2 30/68] virtio-net: support longer header Bugzilla: 1227343 RH-Acked-by: Michael S. Tsirkin RH-Acked-by: David Gibson RH-Acked-by: Laurent Vivier RH-Acked-by: Thomas Huth From: Cornelia Huck virtio-1 devices always use num_buffers in the header, even if mergeable rx buffers have not been negotiated. Signed-off-by: Cornelia Huck Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin Reviewed-by: Michael S. Tsirkin (cherry picked from commit bb9d17f831fa8e70494eab8421d83a542e3d8508) Signed-off-by: Miroslav Rezanina --- hw/net/virtio-net.c | 21 +++++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-) diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index 2b8d019..ea9e22e 100644 --- a/hw/net/virtio-net.c +++ b/hw/net/virtio-net.c @@ -373,15 +373,21 @@ 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); @@ -528,7 +534,9 @@ 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 = @@ -1381,7 +1389,8 @@ 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); @@ -1633,7 +1642,7 @@ 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); -- 1.8.3.1