selftests/net: packetdrill: add --mss option to three tests

Three tests are cooking GSO packets but do not provide
gso_size information to the kernel, triggering this message:

TCP: tun0: Driver has suspect GRO implementation, TCP performance may be compromised.

Add --mss option to avoid this warning.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20250710155641.3028726-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/tools/testing/selftests/net/packetdrill/tcp_blocking_blocking-read.pkt b/tools/testing/selftests/net/packetdrill/tcp_blocking_blocking-read.pkt
index 914eabab367aeb765a85e311513c3ca35ec27946..657e42ca65b5d4280875af49ba8775688172799d 100644 (file)
--- a/tools/testing/selftests/net/packetdrill/tcp_blocking_blocking-read.pkt
+++ b/tools/testing/selftests/net/packetdrill/tcp_blocking_blocking-read.pkt
@@ -1,6 +1,8 @@
 // SPDX-License-Identifier: GPL-2.0
 // Test for blocking read.
+
 --tolerance_usecs=10000
+--mss=1000
 
 `./defaults.sh`
 

diff --git a/tools/testing/selftests/net/packetdrill/tcp_inq_client.pkt b/tools/testing/selftests/net/packetdrill/tcp_inq_client.pkt
index df49c67645ac8f8bdef485f03af6e84d2b883ae9..e13f0eee97952a39a3b67cf276d01d0b9eee16cb 100644 (file)
--- a/tools/testing/selftests/net/packetdrill/tcp_inq_client.pkt
+++ b/tools/testing/selftests/net/packetdrill/tcp_inq_client.pkt
@@ -1,5 +1,8 @@
 // SPDX-License-Identifier: GPL-2.0
 // Test TCP_INQ and TCP_CM_INQ on the client side.
+
+--mss=1000
+
 `./defaults.sh
 `
 

diff --git a/tools/testing/selftests/net/packetdrill/tcp_inq_server.pkt b/tools/testing/selftests/net/packetdrill/tcp_inq_server.pkt
index 04a5e2590c62cf725e92f137470b0bcae309eaba..14dd5f813d50eb6425bb58a72e63d47433a29cb4 100644 (file)
--- a/tools/testing/selftests/net/packetdrill/tcp_inq_server.pkt
+++ b/tools/testing/selftests/net/packetdrill/tcp_inq_server.pkt
@@ -1,5 +1,8 @@
 // SPDX-License-Identifier: GPL-2.0
 // Test TCP_INQ and TCP_CM_INQ on the server side.
+
+--mss=1000
+
 `./defaults.sh
 `