On Sat, Apr 02, 2016 at 12:39:45PM -0400, Tom Herbert wrote: > On Fri, Apr 1, 2016 at 9:21 PM, Brenden Blanco <bbla...@plumgrid.com> wrote: > > Add a new bpf prog type that is intended to run in early stages of the > > packet rx path. Only minimal packet metadata will be available, hence a new > > context type, struct xdp_metadata, is exposed to userspace. So far only > > expose the readable packet length, and only in read mode. > > > This would eventually be a generic abstraction of receive descriptors? Exactly. For instance, maybe let the hw's hash be available. > > > The PHYS_DEV name is chosen to represent that the program is meant only > > for physical adapters, rather than all netdevs. > > > Is there a hard restriction that this could only work with physical devices? I suppose not, but there wouldn't be much use case as compared to tc ingress, no? Since I was imagining that this new hook would be more restricted in functionality due to operating on descriptors rather than with a full skb, I tried to think of an appropriate name.
If you think that this hook would spread, then a better name is needed. > [...]
