From 396854e2e15a51316b4fbddfa076bbb58a650b79 Mon Sep 17 00:00:00 2001
From: Jesper Dangaard Brouer <brouer@redhat.com>
Date: Fri, 12 Nov 2021 11:47:48 +0100
Subject: [PATCH] AF_XDP-interaction: Add --spin-mode that disables
 --wakeup-mode

And default that AF_XDP userspace prog to use wakeup-mode

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
---
 AF_XDP-interaction/af_xdp_user.c   | 6 +++++-
 AF_XDP-interaction/common_params.c | 3 +++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/AF_XDP-interaction/af_xdp_user.c b/AF_XDP-interaction/af_xdp_user.c
index 747ed35..92dc461 100644
--- a/AF_XDP-interaction/af_xdp_user.c
+++ b/AF_XDP-interaction/af_xdp_user.c
@@ -198,6 +198,9 @@ static const struct option_wrapper long_options[] = {
 	{{"wakeup-mode", no_argument,		NULL, 'w' },
 	 "Use poll() API waiting for packets to arrive via wakeup from kernel"},
 
+	{{"spin-mode", no_argument,		NULL, 's' },
+	 "Let userspace process spin checking for packets (disable --wakeup-mode)"},
+
 	{{"unload",      no_argument,		NULL, 'U' },
 	 "Unload XDP program instead of loading"},
 
@@ -772,7 +775,8 @@ int main(int argc, char **argv)
 		.ifindex   = -1,
 		.do_unload = false,
 		.filename = "af_xdp_kern.o",
-		.progsec = "xdp_sock"
+		.progsec = "xdp_sock",
+		.xsk_wakeup_mode = true, /* Default, change via --spin */
 	};
 	struct xsk_umem_info *umem;
 	struct xsk_socket_info *xsk_socket;
diff --git a/AF_XDP-interaction/common_params.c b/AF_XDP-interaction/common_params.c
index 758d7fc..44630e2 100644
--- a/AF_XDP-interaction/common_params.c
+++ b/AF_XDP-interaction/common_params.c
@@ -157,6 +157,9 @@ void parse_cmdline_args(int argc, char **argv,
 		case 'w':
 			cfg->xsk_wakeup_mode = true;
 			break;
+		case 's':
+			cfg->xsk_wakeup_mode = false;
+			break;
 		case 'q':
 			verbose = false;
 			break;