Il 25/05/2012 12:52, zwu.kernel@xxxxxxxxx ha scritto:
> From: Zhi Yong Wu <wuzhy@xxxxxxxxxxxxxxxxxx>
>
> Only when all other hub port's *peer* .can_receive() all return 1, the source hub port .can_receive() return 1.
>
> Signed-off-by: Zhi Yong Wu <wuzhy@xxxxxxxxxxxxxxxxxx>
> ---
> net/hub.c | 27 ++++++++++++++++++++++++---
> 1 files changed, 24 insertions(+), 3 deletions(-)
>
> diff --git a/net/hub.c b/net/hub.c
> index 357ca87..478cce1 100644
> --- a/net/hub.c
> +++ b/net/hub.c
> @@ -15,6 +15,7 @@
> #include "monitor.h"
> #include "net.h"
> #include "hub.h"
> +#include "iov.h"
>
> /*
> * A hub broadcasts incoming packets to all its ports except the source port.
> @@ -59,16 +60,16 @@ static ssize_t net_hub_receive_iov(NetHub *hub, NetHubPort *source_port,
> const struct iovec *iov, int iovcnt)
> {
> NetHubPort *port;
> - ssize_t ret = 0;
> + ssize_t len = iov_size(iov, iovcnt);
>
> QLIST_FOREACH(port, &hub->ports, next) {
> if (port == source_port) {
> continue;
> }
>
> - ret = qemu_sendv_packet(&port->nc, iov, iovcnt);
> + qemu_sendv_packet(&port->nc, iov, iovcnt);
I think you still need to apply flow control, otherwise you're cheating.
But perhaps this is acceptable, I'll leave it to more expert people.
Paolo
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