DROPME: bump TRACE_PAYLOAD_LEN

Gobally increase TRACE_PAYLOAD_LEN to include overlay headers to be
decoded by Hubble.

This is a temporary hack, and datapath should dynamically increase
TRACE_PAYLOAD_LEN based on configuration / trace points.

Signed-off-by: Alexandre Perrin <alex@isovalent.com>

Author: kaworu

bpf/lib/common.h

@@ -543,7 +543,8 @@ enum {
 };
 
 #ifndef TRACE_PAYLOAD_LEN
-#define TRACE_PAYLOAD_LEN 128ULL
+/* Ethernet 16 + IPv6 40 + UDP 8 + VXLAN 8 (Geneve up to 260) [ Ethernet 16 + IPv6 40 + TCP 20 ] = 148 */
+#define TRACE_PAYLOAD_LEN 148ULL
 #endif
 
 #ifndef BPF_F_PSEUDO_HDR

daemon/cmd/daemon_main.go

@@ -723,7 +723,7 @@ func InitGlobalFlags(cmd *cobra.Command, vp *viper.Viper) {
 	flags.String(option.ServiceNoBackendResponse, defaults.ServiceNoBackendResponse, "Response to traffic for a service without backends")
 	option.BindEnv(vp, option.ServiceNoBackendResponse)
 
-	flags.Int(option.TracePayloadlen, 128, "Length of payload to capture when tracing")
+	flags.Int(option.TracePayloadlen, 148, "Length of payload to capture when tracing")
 	option.BindEnv(vp, option.TracePayloadlen)
 
 	flags.Bool(option.Version, false, "Print version information")