Re: [Qemu-devel] [PATCH] net: add API to disable/enable polling

[Anthony Liguori <anthony@codemonkey.ws>]

On 12/24/2009 06:46 AM, Michael S. Tsirkin wrote:
> When vhost is bound to a backend device, we need to stop polling it when
> vhost is started, and restart polling when vhost is stopped.
> Add an API for that for use by vhost, and implement in tap backend.
>
> Signed-off-by: Michael S. Tsirkin<mst@redhat.com>
>    

Applied.  Thanks.

Regards,

Anthony Liguori
> ---
>   net.h     |    3 +++
>   net/tap.c |    8 ++++++++
>   2 files changed, 11 insertions(+), 0 deletions(-)
>
> diff --git a/net.h b/net.h
> index 4971fcb..116bb80 100644
> --- a/net.h
> +++ b/net.h
> @@ -1,6 +1,7 @@
>   #ifndef QEMU_NET_H
>   #define QEMU_NET_H
>
> +#include<stdbool.h>
>   #include "qemu-queue.h"
>   #include "qemu-common.h"
>   #include "qdict.h"
> @@ -36,6 +37,7 @@ typedef enum {
>       NET_CLIENT_TYPE_DUMP
>   } net_client_type;
>
> +typedef void (NetPoll)(VLANClientState *, bool enable);
>   typedef int (NetCanReceive)(VLANClientState *);
>   typedef ssize_t (NetReceive)(VLANClientState *, const uint8_t *, size_t);
>   typedef ssize_t (NetReceiveIOV)(VLANClientState *, const struct iovec *, int);
> @@ -51,6 +53,7 @@ typedef struct NetClientInfo {
>       NetCanReceive *can_receive;
>       NetCleanup *cleanup;
>       LinkStatusChanged *link_status_changed;
> +    NetPoll *poll;
>   } NetClientInfo;
>
>   struct VLANClientState {
> diff --git a/net/tap.c b/net/tap.c
> index 0d8b424..d3492de 100644
> --- a/net/tap.c
> +++ b/net/tap.c
> @@ -262,6 +262,13 @@ static void tap_cleanup(VLANClientState *nc)
>       close(s->fd);
>   }
>
> +static void tap_poll(VLANClientState *nc, bool enable)
> +{
> +    TAPState *s = DO_UPCAST(TAPState, nc, nc);
> +    tap_read_poll(s, enable);
> +    tap_write_poll(s, enable);
> +}
> +
>   /* fd support */
>
>   static NetClientInfo net_tap_info = {
> @@ -270,6 +277,7 @@ static NetClientInfo net_tap_info = {
>       .receive = tap_receive,
>       .receive_raw = tap_receive_raw,
>       .receive_iov = tap_receive_iov,
> +    .poll = tap_poll,
>       .cleanup = tap_cleanup,
>   };
>
>