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| author | WANG Cong <xiyou.wangcong@gmail.com> | 2014-06-23 15:36:02 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-06-25 16:35:37 -0700 |
| commit | bb446c19fefd7b4435adb12a9dd7666adc5b553a (patch) | |
| tree | 6bdb8af244fa9e70a09621209eac7e51a895368a | |
| parent | 13ec7a6b9dad16e8d5ed4e92eb1869670db7a93f (diff) | |
| download | lwn-bb446c19fefd7b4435adb12a9dd7666adc5b553a.tar.gz lwn-bb446c19fefd7b4435adb12a9dd7666adc5b553a.zip | |
veth: add netpoll support
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>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/veth.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/net/veth.c b/drivers/net/veth.c index b4a10bcb66a0..9b945e60530e 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 | \ |