kernel.git/drivers/net/virtio_net.c, branch linux-3.1.y

virtio_net: Fix panic in virtnet_remove

2011-07-22T04:29:34Z

Fix a panic in virtnet_remove. unregister_netdev has already freed up the netdev (and virtnet_info) due to dev->destructor being set, while virtnet_info is still required. Remove virtnet_free altogether, and move the freeing of the per-cpu statistics from virtnet_free to virtnet_remove. Tested patch below. Signed-off-by: Krishna Kumar Acked-by: Michael S. Tsirkin Signed-off-by: David S. Miller

virtio-net: per cpu 64 bit stats (v2)

2011-07-01T03:43:38Z

Use per-cpu variables to maintain 64 bit statistics. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller

virtio_net: introduce VIRTIO_NET_HDR_F_DATA_VALID

2011-06-11T22:57:47Z

There's no need for the guest to validate the checksum if it have been validated by host nics. So this patch introduces a new flag - VIRTIO_NET_HDR_F_DATA_VALID which is used to bypass the checksum examing in guest. The backend (tap/macvtap) may set this flag when met skbs with CHECKSUM_UNNECESSARY to save cpu utilization. No feature negotiation is needed as old driver just ignore this flag. Iperf shows 12%-30% performance improvement for UDP traffic. For TCP, when gro is on no difference as it produces skb with partial checksum. But when gro is disabled, 20% or even higher improvement could be measured by netperf. Signed-off-by: Jason Wang Acked-by: Michael S. Tsirkin Signed-off-by: David S. Miller

virtio_net: delay TX callbacks

2011-05-30T01:44:16Z

Ask for delayed callbacks on TX ring full, to give the other side more of a chance to make progress. Signed-off-by: Michael S. Tsirkin Acked-by: David S. Miller Signed-off-by: Rusty Russell

virtio_net: convert to hw_features

2011-04-02T03:53:35Z

Signed-off-by: Michał Mirosław Signed-off-by: David S. Miller

virtio_net: Add schedule check to napi_enable call

2011-02-10T19:03:31Z

Under harsh testing conditions, including low memory, the guest would stop receiving packets. With this patch applied we no longer see any problems in the driver while performing these tests for extended periods of time. Make sure napi is scheduled subsequent to each napi_enable. Signed-off-by: Bruce Rogers Signed-off-by: Olaf Kirch Cc: stable@kernel.org Signed-off-by: Rusty Russell Signed-off-by: David S. Miller

net: Use skb_checksum_start_offset()

2010-12-16T22:43:14Z

Replace skb->csum_start - skb_headroom(skb) with skb_checksum_start_offset(). Note for usb/smsc95xx: skb->data - skb->head == skb_headroom(skb). Signed-off-by: Michał Mirosław Signed-off-by: David S. Miller

virtio-net: init link state correctly

2010-11-12T20:21:18Z

For device that supports VIRTIO_NET_F_STATUS, there's no need to assume the link is up and we need to call nerif_carrier_off() before querying device status, otherwise we may get wrong operstate after diver was loaded because the link watch event was not fired as expected. For device that does not support VIRITO_NET_F_STATUS, we could not get its status through virtnet_update_status() and what we can only do is always assuming the link is up. Acked-by: Michael S. Tsirkin Signed-off-by: Jason Wang Signed-off-by: Rusty Russell Signed-off-by: David S. Miller

ethtool: Provide a default implementation of ethtool_ops::get_drvinfo

2010-08-17T09:31:15Z

The driver name and bus address for a net_device can normally be found through the driver model now. Instead of requiring drivers to provide this information redundantly through the ethtool_ops::get_drvinfo operation, use the driver model to do so if the driver does not define the operation. Since ETHTOOL_GDRVINFO no longer requires the driver to implement any operations, do not require net_device::ethtool_ops to be set either. Remove implementations of get_drvinfo and ethtool_ops that provide only this information. Signed-off-by: Ben Hutchings Signed-off-by: David S. Miller

virtio_net: implements ethtool_ops.get_drvinfo

2010-08-05T04:53:17Z

I often use "ethtool -i" command to check what driver controls the ehternet device. But because current virtio_net driver doesn't support "ethtool -i", it becomes the following: # ethtool -i eth3 Cannot get driver information: Operation not supported This patch simply adds the "ethtool -i" support. The following is the result when using the virtio_net driver with my patch applied to. # ethtool -i eth3 driver: virtio_net version: N/A firmware-version: N/A bus-info: virtio0 Personally, "-i" is one of the most frequently-used option, and most network drivers support "ethtool -i", so I think virtio_net also should do. Signed-off-by: Taku Izumi Signed-off-by: Rusty Russell (use ARRAY_SIZE) Signed-off-by: David S. Miller