* [Patch v2 net-next] veth: add netpoll support
@ 2014-06-23 22:36 Cong Wang
2014-06-24 11:07 ` Neil Horman
2014-06-25 23:35 ` David Miller
0 siblings, 2 replies; 3+ messages in thread
From: Cong Wang @ 2014-06-23 22:36 UTC (permalink / raw)
To: netdev; +Cc: Stefan Priebe, Cong Wang, David S. Miller, Neil Horman
It is trivial to add netpoll support to veth, since
it is not a stacked device, we don't need to setup and
clean up netpoll.
Reported-by: Stefan Priebe <s.priebe@profihost.ag>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
---
drivers/net/veth.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index b4a10bc..9b945e6 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -248,6 +248,21 @@ static void veth_dev_free(struct net_device *dev)
free_netdev(dev);
}
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void veth_poll_controller(struct net_device *dev)
+{
+ /* veth only receives frames when its peer sends one
+ * Since it's a synchronous operation, we are guaranteed
+ * never to have pending data when we poll for it so
+ * there is nothing to do here.
+ *
+ * We need this though so netpoll recognizes us as an interface that
+ * supports polling, which enables bridge devices in virt setups to
+ * still use netconsole
+ */
+}
+#endif /* CONFIG_NET_POLL_CONTROLLER */
+
static const struct net_device_ops veth_netdev_ops = {
.ndo_init = veth_dev_init,
.ndo_open = veth_open,
@@ -257,6 +272,9 @@ static const struct net_device_ops veth_netdev_ops = {
.ndo_get_stats64 = veth_get_stats64,
.ndo_set_rx_mode = veth_set_multicast_list,
.ndo_set_mac_address = eth_mac_addr,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = veth_poll_controller,
+#endif
};
#define VETH_FEATURES (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
--
1.8.3.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [Patch v2 net-next] veth: add netpoll support
2014-06-23 22:36 [Patch v2 net-next] veth: add netpoll support Cong Wang
@ 2014-06-24 11:07 ` Neil Horman
2014-06-25 23:35 ` David Miller
1 sibling, 0 replies; 3+ messages in thread
From: Neil Horman @ 2014-06-24 11:07 UTC (permalink / raw)
To: Cong Wang; +Cc: netdev, Stefan Priebe, David S. Miller
On Mon, Jun 23, 2014 at 03:36:02PM -0700, Cong Wang wrote:
> It is trivial to add netpoll support to veth, since
> it is not a stacked device, we don't need to setup and
> clean up netpoll.
>
> Reported-by: Stefan Priebe <s.priebe@profihost.ag>
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Neil Horman <nhorman@tuxdriver.com>
> Acked-by: Neil Horman <nhorman@tuxdriver.com>
> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
> ---
> drivers/net/veth.c | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
> diff --git a/drivers/net/veth.c b/drivers/net/veth.c
> index b4a10bc..9b945e6 100644
> --- a/drivers/net/veth.c
> +++ b/drivers/net/veth.c
> @@ -248,6 +248,21 @@ static void veth_dev_free(struct net_device *dev)
> free_netdev(dev);
> }
>
> +#ifdef CONFIG_NET_POLL_CONTROLLER
> +static void veth_poll_controller(struct net_device *dev)
> +{
> + /* veth only receives frames when its peer sends one
> + * Since it's a synchronous operation, we are guaranteed
> + * never to have pending data when we poll for it so
> + * there is nothing to do here.
> + *
> + * We need this though so netpoll recognizes us as an interface that
> + * supports polling, which enables bridge devices in virt setups to
> + * still use netconsole
> + */
> +}
> +#endif /* CONFIG_NET_POLL_CONTROLLER */
> +
> static const struct net_device_ops veth_netdev_ops = {
> .ndo_init = veth_dev_init,
> .ndo_open = veth_open,
> @@ -257,6 +272,9 @@ static const struct net_device_ops veth_netdev_ops = {
> .ndo_get_stats64 = veth_get_stats64,
> .ndo_set_rx_mode = veth_set_multicast_list,
> .ndo_set_mac_address = eth_mac_addr,
> +#ifdef CONFIG_NET_POLL_CONTROLLER
> + .ndo_poll_controller = veth_poll_controller,
> +#endif
> };
>
> #define VETH_FEATURES (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
> --
> 1.8.3.1
>
>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Patch v2 net-next] veth: add netpoll support
2014-06-23 22:36 [Patch v2 net-next] veth: add netpoll support Cong Wang
2014-06-24 11:07 ` Neil Horman
@ 2014-06-25 23:35 ` David Miller
1 sibling, 0 replies; 3+ messages in thread
From: David Miller @ 2014-06-25 23:35 UTC (permalink / raw)
To: xiyou.wangcong; +Cc: netdev, s.priebe, nhorman
From: Cong Wang <xiyou.wangcong@gmail.com>
Date: Mon, 23 Jun 2014 15:36:02 -0700
> It is trivial to add netpoll support to veth, since
> it is not a stacked device, we don't need to setup and
> clean up netpoll.
>
> Reported-by: Stefan Priebe <s.priebe@profihost.ag>
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Neil Horman <nhorman@tuxdriver.com>
> Acked-by: Neil Horman <nhorman@tuxdriver.com>
> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Applied, thanks.
^ permalink raw reply [flat|nested] 3+ messages in thread
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