On Thu, 2012-12-06 at 17:56 -0800, Joseph Gasparakis wrote:
> This patch adds support in the kernel for offloading in the NIC Tx and Rx
> checksumming for encapsulated packets (such as VXLAN and IP GRE).
[...]
> --- a/include/linux/netdevice.h
> +++ b/include/linux/netdevice.h
> @@ -1063,6 +1063,8 @@ struct net_device {
> netdev_features_t wanted_features;
> /* mask of features inheritable by VLAN devices */
> netdev_features_t vlan_features;
> + /* mask of features inherited by encapsulating devices */
> + netdev_features_t hw_enc_features;
[...]
How will the networking core know *which* encapsulations this applies
to? I notice that your implementation in ixgbe does not set
NETIF_F_HW_CSUM here, so presumably the hardware will parse headers to
find which ranges should be checksummed and it won't cover the next
encapsulation protocol that comes along.
Ben.
--
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.
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