1 files changed, 54 insertions, 0 deletions
diff --git a/vendor/github.com/cilium/ebpf/link/xdp.go b/vendor/github.com/cilium/ebpf/link/xdp.go
new file mode 100644
index 000000000..aa8dd3a4c
--- /dev/null
+++ b/vendor/github.com/cilium/ebpf/link/xdp.go
@@ -0,0 +1,54 @@
+package link
+
+import (
+	"fmt"
+
+	"github.com/cilium/ebpf"
+)
+
+// XDPAttachFlags represents how XDP program will be attached to interface.
+type XDPAttachFlags uint32
+
+const (
+	// XDPGenericMode (SKB) links XDP BPF program for drivers which do
+	// not yet support native XDP.
+	XDPGenericMode XDPAttachFlags = 1 << (iota + 1)
+	// XDPDriverMode links XDP BPF program into the driver’s receive path.
+	XDPDriverMode
+	// XDPOffloadMode offloads the entire XDP BPF program into hardware.
+	XDPOffloadMode
+)
+
+type XDPOptions struct {
+	// Program must be an XDP BPF program.
+	Program *ebpf.Program
+
+	// Interface is the interface index to attach program to.
+	Interface int
+
+	// Flags is one of XDPAttachFlags (optional).
+	//
+	// Only one XDP mode should be set, without flag defaults
+	// to driver/generic mode (best effort).
+	Flags XDPAttachFlags
+}
+
+// AttachXDP links an XDP BPF program to an XDP hook.
+func AttachXDP(opts XDPOptions) (Link, error) {
+	if t := opts.Program.Type(); t != ebpf.XDP {
+		return nil, fmt.Errorf("invalid program type %s, expected XDP", t)
+	}
+
+	if opts.Interface < 1 {
+		return nil, fmt.Errorf("invalid interface index: %d", opts.Interface)
+	}
+
+	rawLink, err := AttachRawLink(RawLinkOptions{
+		Program: opts.Program,
+		Attach:  ebpf.AttachXDP,
+		Target:  opts.Interface,
+		Flags:   uint32(opts.Flags),
+	})
+
+	return rawLink, err
+}