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selftests/net: Test PACKET_STATISTICS

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Update the existing packet socket test to include a test for the sockopt
PACKET_STATISTICS.

Signed-off-by: Joe Damato <joe@dama.to>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Joe Damato 2026-07-20 05:27:10 -07:00 committed by Jakub Kicinski
parent 24d0af194b
commit d6587d0c0f
1 changed files with 31 additions and 1 deletions
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32
tools/testing/selftests/net/psock_snd.c
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@ -359,6 +359,34 @@ static void parse_opts(int argc, char **argv)
error(1, 0, "option gso (-g) requires csum offload (-c)");
}
static void check_packet_stats(int fd)
{
struct tpacket_stats st = {};
socklen_t len = sizeof(st);
if (getsockopt(fd, SOL_PACKET, PACKET_STATISTICS, &st, &len))
error(1, errno, "getsockopt packet statistics");
if (st.tp_packets != 1)
error(1, 0, "stats: tp_packets %u != 1", st.tp_packets);
if (st.tp_drops != 0)
error(1, 0, "stats: tp_drops %u != 0", st.tp_drops);
/* verify clear on read */
memset(&st, 0xff, sizeof(st));
len = sizeof(st);
if (getsockopt(fd, SOL_PACKET, PACKET_STATISTICS, &st, &len))
error(1, errno, "getsockopt packet statistics");
if (st.tp_packets != 0)
error(1, 0, "stats: tp_packets %u != 0 after clear", st.tp_packets);
if (st.tp_drops != 0)
error(1, 0, "stats: tp_drops %u != 0 after clear", st.tp_drops);
}
static void run_test(void)
{
int fdr, fds, total_len;
@ -369,9 +397,11 @@ static void run_test(void)
total_len = do_tx();
/* BPF filter accepts only this length, vlan changes MAC */
if (cfg_payload_len == DATA_LEN && !cfg_use_vlan)
if (cfg_payload_len == DATA_LEN && !cfg_use_vlan) {
do_rx(fds, total_len - sizeof(struct virtio_net_hdr),
tbuf + sizeof(struct virtio_net_hdr));
check_packet_stats(fds);
}
do_rx(fdr, cfg_payload_len, tbuf + total_len - cfg_payload_len);