Currently, user needs to manually enable transmit hardware timestamp feature of certain Ethernet drivers, e.g. stmmac and igc drivers, through following command after running the xdp_hw_metadata app.

sudo hwstamp_ctl -i eth0 -t 1

To simplify the step test of xdp_hw_metadata, set tx_type to HWTSTAMP_TX_ON to enable hardware timestamping for all outgoing packets, so that user no longer need to execute hwstamp_ctl command.

Signed-off-by: Song Yoong Siang yoong.siang.song@intel.com Acked-by: Stanislav Fomichev sdf@fomichev.me --- v1: https://patchwork.kernel.org/project/netdevbpf/patch/20241204115715.3148412-...

v1->v2 changelog: - Add detail in commit msg on why HWTSTAMP_TX_ON is needed (Stanislav). - Separate the patch into two, current one submit to bpf-next, another one submit to bpf. --- tools/testing/selftests/bpf/xdp_hw_metadata.c | 1 + 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/bpf/xdp_hw_metadata.c b/tools/testing/selftests/bpf/xdp_hw_metadata.c index 06266aad2f99..96c65500f4b4 100644 --- a/tools/testing/selftests/bpf/xdp_hw_metadata.c +++ b/tools/testing/selftests/bpf/xdp_hw_metadata.c @@ -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);