Re: [PATCH ipsec-next v1 5/7] bpf: selftests: test_tunnel: Use vmlinux.h declarations

vmlinux.h declarations are more ergnomic, especially when working with
kfuncs. The uapi headers are often incomplete for kfunc definitions.

Co-developed-by: Antony Antony <redacted>
Signed-off-by: Antony Antony <redacted>
Signed-off-by: Daniel Xu <redacted>
---
  .../selftests/bpf/progs/bpf_tracing_net.h     |  1 +
  .../selftests/bpf/progs/test_tunnel_kern.c    | 48 ++++---------------
  2 files changed, 9 insertions(+), 40 deletions(-)

diff --git a/tools/testing/selftests/bpf/progs/bpf_tracing_net.h b/tools/testing/selftests/bpf/progs/bpf_tracing_net.h
index 0b793a102791..1bdc680b0e0e 100644
--- a/tools/testing/selftests/bpf/progs/bpf_tracing_net.h
+++ b/tools/testing/selftests/bpf/progs/bpf_tracing_net.h

@@ -26,6 +26,7 @@
  #define IPV6_AUTOFLOWLABEL	70
  
  #define TC_ACT_UNSPEC		(-1)
+#define TC_ACT_OK		0
  #define TC_ACT_SHOT		2
  
  #define SOL_TCP			6

diff --git a/tools/testing/selftests/bpf/progs/test_tunnel_kern.c b/tools/testing/selftests/bpf/progs/test_tunnel_kern.c
index f66af753bbbb..3065a716544d 100644
--- a/tools/testing/selftests/bpf/progs/test_tunnel_kern.c
+++ b/tools/testing/selftests/bpf/progs/test_tunnel_kern.c

@@ -6,62 +6,30 @@
   * modify it under the terms of version 2 of the GNU General Public
   * License as published by the Free Software Foundation.
   */
-#include <stddef.h>
-#include <string.h>
-#include <arpa/inet.h>
-#include <linux/bpf.h>
-#include <linux/if_ether.h>
-#include <linux/if_packet.h>
-#include <linux/if_tunnel.h>
-#include <linux/ip.h>
-#include <linux/ipv6.h>
-#include <linux/icmp.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/pkt_cls.h>
-#include <linux/erspan.h>
-#include <linux/udp.h>
+#include "vmlinux.h"
  #include <bpf/bpf_helpers.h>
  #include <bpf/bpf_endian.h>
+#include "bpf_kfuncs.h"
+#include "bpf_tracing_net.h"
  
  #define log_err(__ret) bpf_printk("ERROR line:%d ret:%d\n", __LINE__, __ret)
  
-#define VXLAN_UDP_PORT 4789
+#define VXLAN_UDP_PORT		4789
+#define ETH_P_IP		0x0800
+#define PACKET_HOST		0
+#define TUNNEL_CSUM		bpf_htons(0x01)
+#define TUNNEL_KEY		bpf_htons(0x04)
  
  /* Only IPv4 address assigned to veth1.
   * 172.16.1.200
   */
  #define ASSIGNED_ADDR_VETH1 0xac1001c8
  
-struct geneve_opt {
-	__be16	opt_class;
-	__u8	type;
-	__u8	length:5;
-	__u8	r3:1;
-	__u8	r2:1;
-	__u8	r1:1;
-	__u8	opt_data[8]; /* hard-coded to 8 byte */
-};
-
  struct vxlanhdr {
  	__be32 vx_flags;
  	__be32 vx_vni;
  } __attribute__((packed));