[PATCH bpf-next 1/1] selftests/bpf: Enable Tx hwtstamp in xdp_hw_metadata

[Song Yoong Siang]

Set tx_type to HWTSTAMP_TX_ON to enable hardware timestamping for all
outgoing packets.

Besides, set XDP_UMEM_TX_METADATA_LEN flag to reserve tx_metadata_len bytes
of per-chunk metadata.

Signed-off-by: Song Yoong Siang <yoong.siang.song@xxxxxxxxx>
---
 tools/testing/selftests/bpf/xdp_hw_metadata.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/xdp_hw_metadata.c b/tools/testing/selftests/bpf/xdp_hw_metadata.c
index 06266aad2f99..6f7b15d6c6ed 100644
--- a/tools/testing/selftests/bpf/xdp_hw_metadata.c
+++ b/tools/testing/selftests/bpf/xdp_hw_metadata.c
@@ -79,7 +79,7 @@ static int open_xsk(int ifindex, struct xsk *xsk, __u32 queue_id)
 		.fill_size = XSK_RING_PROD__DEFAULT_NUM_DESCS,
 		.comp_size = XSK_RING_CONS__DEFAULT_NUM_DESCS,
 		.frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE,
-		.flags = XSK_UMEM__DEFAULT_FLAGS,
+		.flags = XDP_UMEM_TX_METADATA_LEN,
 		.tx_metadata_len = sizeof(struct xsk_tx_metadata),
 	};
 	__u32 idx = 0;
@@ -551,6 +551,7 @@ static void hwtstamp_enable(const char *ifname)
 {
 	struct hwtstamp_config cfg = {
 		.rx_filter = HWTSTAMP_FILTER_ALL,
+		.tx_type = HWTSTAMP_TX_ON,
 	};
 
 	hwtstamp_ioctl(SIOCGHWTSTAMP, ifname, &saved_hwtstamp_cfg);
-- 
2.34.1