diff options
| author | Anubhav Singh <anubhavsinggh@google.com> | 2025-10-30 06:28:18 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-10-31 17:32:24 -0700 |
| commit | 02d064de05b1fcca769391fa82d205bed8bb9bf0 (patch) | |
| tree | 88b8a6aff4937f3ed43400403afbdd6edd2b85c5 /tools | |
| parent | net: dsa: tag_brcm: legacy: fix untagged rx on unbridged ports for bcm63xx (diff) | |
| download | linux-02d064de05b1fcca769391fa82d205bed8bb9bf0.tar.gz linux-02d064de05b1fcca769391fa82d205bed8bb9bf0.zip | |
selftests/net: fix out-of-order delivery of FIN in gro:tcp test
Due to the gro_sender sending data packets and FIN packets
in very quick succession, these are received almost simultaneously
by the gro_receiver. FIN packets are sometimes processed before the
data packets leading to intermittent (~1/100) test failures.
This change adds a delay of 100ms before sending FIN packets
in gro:tcp test to avoid the out-of-order delivery. The same
mitigation already exists for the gro:ip test.
Fixes: 7d1575014a63 ("selftests/net: GRO coalesce test")
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Anubhav Singh <anubhavsinggh@google.com>
Link: https://patch.msgid.link/20251030062818.1562228-1-anubhavsinggh@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/net/gro.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/testing/selftests/net/gro.c b/tools/testing/selftests/net/gro.c index 2b1d9f2b3e9e..3fa63bd85dea 100644 --- a/tools/testing/selftests/net/gro.c +++ b/tools/testing/selftests/net/gro.c @@ -989,6 +989,7 @@ static void check_recv_pkts(int fd, int *correct_payload, static void gro_sender(void) { + const int fin_delay_us = 100 * 1000; static char fin_pkt[MAX_HDR_LEN]; struct sockaddr_ll daddr = {}; int txfd = -1; @@ -1032,15 +1033,22 @@ static void gro_sender(void) write_packet(txfd, fin_pkt, total_hdr_len, &daddr); } else if (strcmp(testname, "tcp") == 0) { send_changed_checksum(txfd, &daddr); + /* Adding sleep before sending FIN so that it is not + * received prior to other packets. + */ + usleep(fin_delay_us); write_packet(txfd, fin_pkt, total_hdr_len, &daddr); send_changed_seq(txfd, &daddr); + usleep(fin_delay_us); write_packet(txfd, fin_pkt, total_hdr_len, &daddr); send_changed_ts(txfd, &daddr); + usleep(fin_delay_us); write_packet(txfd, fin_pkt, total_hdr_len, &daddr); send_diff_opt(txfd, &daddr); + usleep(fin_delay_us); write_packet(txfd, fin_pkt, total_hdr_len, &daddr); } else if (strcmp(testname, "ip") == 0) { send_changed_ECN(txfd, &daddr); |