On Tue, Jul 07, 2015 at 09:21:07AM +0800, Fam Zheng wrote: > Since commit 6e99c63 "net/socket: Drop net_socket_can_send" and friends, > net queues need to be explicitly flushed after qemu_can_send_packet() > returns false, because the netdev side will disable the polling of fd. > > This fixes the case of "cont" after "stop" (or migration). > > Signed-off-by: Fam Zheng <[email protected]> > > --- > > v2: Unify with VM stop handler. (Stefan)
Thanks! I'm happy with this but I'll wait for you to respond to Jason's
comment.
> ---
> net/net.c | 19 ++++++++++++-------
> 1 file changed, 12 insertions(+), 7 deletions(-)
>
> diff --git a/net/net.c b/net/net.c
> index 6ff7fec..28a5597 100644
> --- a/net/net.c
> +++ b/net/net.c
> @@ -1257,14 +1257,19 @@ void qmp_set_link(const char *name, bool up, Error
> **errp)
> static void net_vm_change_state_handler(void *opaque, int running,
> RunState state)
> {
> - /* Complete all queued packets, to guarantee we don't modify
> - * state later when VM is not running.
> - */
> - if (!running) {
> - NetClientState *nc;
> - NetClientState *tmp;
> + NetClientState *nc;
> + NetClientState *tmp;
>
> - QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) {
> + QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) {
> + if (running) {
> + /* Flush queued packets and wake up backends. */
> + if (nc->peer && qemu_can_send_packet(nc)) {
> + qemu_flush_queued_packets(nc->peer);
> + }
> + } else {
> + /* Complete all queued packets, to guarantee we don't modify
> + * state later when VM is not running.
> + */
> qemu_flush_or_purge_queued_packets(nc, true);
> }
> }
> --
> 2.4.3
>
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