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由 Vincent Palatin 提交于
If any of the clients is not ready to receive (ie it has a can_receive callback and can_receive() returns false), we don't want to start sending, else this client may miss/discard the packet. I got this behaviour with the following setup : the emulated machine is using an USB-ethernet adapter, it is connected to the network using SLIRP and I'm dumping the traffic in a .pcap file. As per the following command line : -net nic,model=usb,vlan=1 -net user,vlan=1 -net dump,vlan=1,file=/tmp/pkt.pcap Every time that two packets are coming in a row from the host, the usb-net code will receive the first one, then returns 0 to can_receive call since it has a 1 packet long queue. But as the dump code is always ready to receive, qemu_can_send_packet will return true and the next packet will discard the previous one in the usb-net code. Signed-off-by: NVincent Palatin <vpalatin@chromium.org> Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>
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