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virtio-net: Fix num_buffers for version 1

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The specification says the device MUST set num_buffers to 1 if
VIRTIO_NET_F_MRG_RXBUF has not been negotiated.

Fixes: df91055db5c9 ("virtio-net: enable virtio 1.0")
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20250108-buffers-v1-1-a0c85ff31aeb@daynix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Akihiko Odaki 2025-01-08 21:13:29 +09:00 committed by Michael S. Tsirkin
parent b876e721f1
commit c17ad4b11b
1 changed files with 2 additions and 0 deletions
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2
hw/net/virtio-net.c
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@ -1999,6 +1999,8 @@ static ssize_t virtio_net_receive_rcu(NetClientState *nc, const uint8_t *buf,
offsetof(typeof(hdr),
virtio_net.hdr.num_buffers),
sizeof(hdr.virtio_net.hdr.num_buffers));
} else {
hdr.virtio_net.hdr.num_buffers = cpu_to_le16(1);
}
guest_offset = n->has_vnet_hdr ?