Documentation
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Overview ¶
Package afxdp adapts the zero-copy AF_XDP forwarder.Forwarder to the vtep.Datapath seam. It is the privileged, kernel-zero-copy driver of the vtep family (veth + driver-XDP NIC, shared UMEM, in-place transform), used for the per-node / tunnelproxy VTEP where the overlay consumer is the host kernel.
Unlike the netstack and tun drivers — which drive the engine through the cross-buffer EngineXfrm contract — the AF_XDP driver keeps the in-place forwarder.Handler contract and its shared-UMEM zero-copy fast path entirely internally. This wrapper is a pure lifecycle adapter (Run/Close delegate to the forwarder's existing per-queue poll loop); it deliberately does not route the hot path through EngineXfrm, whose copy-based contract would forfeit the zero-copy handoff. The forwarder's in-place loop, shared UMEM, and minInPlaceHeadroom invariant are untouched.
Index ¶
Constants ¶
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Variables ¶
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Functions ¶
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Types ¶
type Datapath ¶
type Datapath struct {
// contains filtered or unexported fields
}
Datapath wraps a *forwarder.Forwarder so it satisfies vtep.Datapath. The wrapped forwarder owns its veth/XDP device and AF_XDP underlay and releases them on Close.
func Wrap ¶
Wrap adapts an already-constructed forwarder.Forwarder (built via forwarder.NewForwarder with the desired phy/virt/filter options) to the vtep.Datapath interface. The caller transfers ownership: the returned Datapath's Close closes the forwarder.
Source Files