From 97f9ba67be6b9595136c06c397e478f1c18d0695 Mon Sep 17 00:00:00 2001
From: Konstantin Belyalov <belyalov@dropbox.com>
Date: Thu, 23 Jan 2020 12:15:42 -0800
Subject: [PATCH] Save XDP attach mode into LinkXdp.

---
 link.go          | 9 +++++----
 link_linux.go    | 3 ++-
 nl/link_linux.go | 8 ++++++++
 3 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/link.go b/link.go
index 886d88d1..28222452 100644
--- a/link.go
+++ b/link.go
@@ -196,10 +196,11 @@ type LinkStatistics64 struct {
 }
 
 type LinkXdp struct {
-	Fd       int
-	Attached bool
-	Flags    uint32
-	ProgId   uint32
+	Fd         int
+	Attached   bool
+	AttachMode uint32
+	Flags      uint32
+	ProgId     uint32
 }
 
 // Device links cannot be created via netlink. These links
diff --git a/link_linux.go b/link_linux.go
index ec915a0b..89450da6 100644
--- a/link_linux.go
+++ b/link_linux.go
@@ -2513,7 +2513,8 @@ func parseLinkXdp(data []byte) (*LinkXdp, error) {
 		case nl.IFLA_XDP_FD:
 			xdp.Fd = int(native.Uint32(attr.Value[0:4]))
 		case nl.IFLA_XDP_ATTACHED:
-			xdp.Attached = attr.Value[0] != 0
+			xdp.AttachMode = uint32(attr.Value[0])
+			xdp.Attached = xdp.AttachMode != 0
 		case nl.IFLA_XDP_FLAGS:
 			xdp.Flags = native.Uint32(attr.Value[0:4])
 		case nl.IFLA_XDP_PROG_ID:
diff --git a/nl/link_linux.go b/nl/link_linux.go
index afb16a9c..5cb166c1 100644
--- a/nl/link_linux.go
+++ b/nl/link_linux.go
@@ -478,6 +478,14 @@ const (
 	IFLA_XDP_MAX      = IFLA_XDP_PROG_ID
 )
 
+// XDP program attach mode (used as dump value for IFLA_XDP_ATTACHED)
+const (
+	XDP_ATTACHED_NONE = iota
+	XDP_ATTACHED_DRV
+	XDP_ATTACHED_SKB
+	XDP_ATTACHED_HW
+)
+
 const (
 	IFLA_IPTUN_UNSPEC = iota
 	IFLA_IPTUN_LINK