kernel/linux.git/tools/testing/selftests/net/packetdrill, branch v6.19.11

selftests/net: packetdrill: pass send_omit_free to MSG_ZEROCOPY tests

2025-11-26T23:57:55+00:00

The --send_omit_free flag is needed for TCP zero copy tests, to ensure that packetdrill doesn't free the send() buffer after the send() call. Fixes: 1e42f73fd3c2 ("selftests/net: packetdrill: import tcp/zerocopy") Closes: https://lore.kernel.org/netdev/20251124071831.4cbbf412@kernel.org/ Suggested-by: Neal Cardwell Signed-off-by: Willem de Bruijn Link: https://patch.msgid.link/20251125234029.1320984-1-willemdebruijn.kernel@gmail.com Signed-off-by: Jakub Kicinski

selftest: packetdrill: Add max RTO test for SYN+ACK.

2025-11-08T02:05:26+00:00

This script sets net.ipv4.tcp_rto_max_ms to 1000 and checks if SYN+ACK RTO is capped at 1s for TFO and non-TFO. Without the previous patch, the max RTO is applied to TFO SYN+ACK only, and non-TFO SYN+ACK RTO increases exponentially. # selftests: net/packetdrill: tcp_rto_synack_rto_max.pkt # TAP version 13 # 1..2 # tcp_rto_synack_rto_max.pkt:46: error handling packet: timing error: expected outbound packet at 5.091936 sec but happened at 6.107826 sec; tolerance 0.127974 sec # script packet: 5.091936 S. 0:0(0) ack 1 # actual packet: 6.107826 S. 0:0(0) ack 1 win 65535 # not ok 1 ipv4 # tcp_rto_synack_rto_max.pkt:46: error handling packet: timing error: expected outbound packet at 5.075901 sec but happened at 6.091841 sec; tolerance 0.127976 sec # script packet: 5.075901 S. 0:0(0) ack 1 # actual packet: 6.091841 S. 0:0(0) ack 1 win 65535 # not ok 2 ipv6 # # Totals: pass:0 fail:2 xfail:0 xpass:0 skip:0 error:0 not ok 49 selftests: net/packetdrill: tcp_rto_synack_rto_max.pkt # exit=1 With the previous patch, all SYN+ACKs are retransmitted after 1s. # selftests: net/packetdrill: tcp_rto_synack_rto_max.pkt # TAP version 13 # 1..2 # ok 1 ipv4 # ok 2 ipv6 # # Totals: pass:2 fail:0 xfail:0 xpass:0 skip:0 error:0 ok 49 selftests: net/packetdrill: tcp_rto_synack_rto_max.pkt Signed-off-by: Kuniyuki Iwashima Reviewed-by: Eric Dumazet Link: https://patch.msgid.link/20251106003357.273403-7-kuniyu@google.com Signed-off-by: Jakub Kicinski

selftests/net: packetdrill: unflake tcp_user_timeout_user-timeout-probe.pkt

2025-10-16T23:25:09+00:00

This test fails the first time I am running it after a fresh virtme-ng boot. tcp_user_timeout_user-timeout-probe.pkt:33: runtime error in write call: Expected result -1 but got 24 with errno 2 (No such file or directory) Tweaks the timings a bit, to reduce flakiness. Signed-off-by: Eric Dumazet Cc: Soham Chakradeo Cc: Willem de Bruijn Reviewed-by: Kuniyuki Iwashima Tested-by: Jamal Hadi Salim Acked-by: Jamal Hadi Salim Link: https://patch.msgid.link/20251014171907.3554413-2-edumazet@google.com Signed-off-by: Jakub Kicinski

selftests: net: unify the Makefile formats

2025-10-06T20:14:06+00:00

We get a significant number of conflicts between net and net-next because of selftests Makefile changes. People tend to append new test cases at the end of the Makefile when there's no clear sort order. Sort all networking selftests Makefiles, use the following format: VAR_NAME := \ entry1 \ entry2 \ entry3 \ # end of VAR_NAME Some Makefiles are already pretty close to this. Acked-by: Antonio Quartulli Acked-by: Matthieu Baerts (NGI0) Acked-by: Allison Henderson Reviewed-by: Petr Machata Link: https://patch.msgid.link/20251003210127.1021918-1-kuba@kernel.org Signed-off-by: Jakub Kicinski

selftests: net: sort configs

2025-10-06T20:12:59+00:00

Sort config files for networking selftests. This should help us avoid merge conflicts between net and net-next. patchwork check will be added to prevent new issues. Acked-by: Phil Sutter Acked-by: Matthieu Baerts (NGI0) Acked-by: Florian Westphal Acked-by: Antonio Quartulli Link: https://patch.msgid.link/20251003205736.1019673-1-kuba@kernel.org Signed-off-by: Jakub Kicinski

selftest: packetdrill: Import client-ack-dropped-then-recovery-ms-timestamps.pkt

2025-09-30T01:41:39+00:00

This also does not have the non-experimental version, so converted to FO. The comment in .pkt explains the detailed scenario. Signed-off-by: Kuniyuki Iwashima Reviewed-by: Willem de Bruijn Link: https://patch.msgid.link/20250927213022.1850048-14-kuniyu@google.com Signed-off-by: Jakub Kicinski

selftest: packetdrill: Import sockopt-fastopen-key.pkt

2025-09-30T01:41:39+00:00

sockopt-fastopen-key.pkt does not have the non-experimental version, so the Experimental version is converted, FOEXP -> FO. The test sets net.ipv4.tcp_fastopen_key=0-0-0-0 and instead sets another key via setsockopt(TCP_FASTOPEN_KEY). The first listener generates a valid cookie in response to TFO option without cookie, and the second listner creates a TFO socket using the valid cookie. TCP_FASTOPEN_KEY is adjusted to use the common key in default.sh so that we can use TFO_COOKIE and support dualstack. Similarly, TFO_COOKIE_ZERO for the 0-0-0-0 key is defined. Signed-off-by: Kuniyuki Iwashima Reviewed-by: Willem de Bruijn Link: https://patch.msgid.link/20250927213022.1850048-13-kuniyu@google.com Signed-off-by: Jakub Kicinski

selftest: packetdrill: Refine tcp_fastopen_server_reset-after-disconnect.pkt.

2025-09-30T01:41:39+00:00

These changes are applied to follow the imported packetdrill tests. * Call setsockopt(TCP_FASTOPEN) * Remove unnecessary accept() delay * Add assertion for TCP states * Rename to tcp_fastopen_server_trigger-rst-reconnect.pkt. Signed-off-by: Kuniyuki Iwashima Reviewed-by: Willem de Bruijn Link: https://patch.msgid.link/20250927213022.1850048-12-kuniyu@google.com Signed-off-by: Jakub Kicinski

selftest: packetdrill: Import opt34/*-trigger-rst.pkt.

2025-09-30T01:41:39+00:00

This imports the non-experimental version of opt34/*-trigger-rst.pkt. | accept() | SYN data | -----------------------------------+----------+----------+ listener-closed-trigger-rst.pkt | no | unread | unread-data-closed-trigger-rst.pkt | yes | unread | Both files test that close()ing a SYN_RECV socket with unread SYN data triggers RST. The files are renamed to have the common prefix, trigger-rst. Signed-off-by: Kuniyuki Iwashima Reviewed-by: Willem de Bruijn Link: https://patch.msgid.link/20250927213022.1850048-11-kuniyu@google.com Signed-off-by: Jakub Kicinski

selftest: packetdrill: Import opt34/reset-* tests.

2025-09-30T01:41:39+00:00

This imports the non-experimental version of opt34/reset-*.pkt. | Child | RST | sk_err | ---------------------------------+---------+-------------------------------+---------+ reset-after-accept.pkt | TFO | after accept(), SYN_RECV | read() | reset-close-with-unread-data.pkt | TFO | after accept(), SYN_RECV | write() | reset-before-accept.pkt | TFO | before accept(), SYN_RECV | read() | reset-non-tfo-socket.pkt | non-TFO | before accept(), ESTABLISHED | write() | The first 3 files test scenarios where a SYN_RECV socket receives RST before/after accept() and data in SYN must be read() without error, but the following read() or fist write() will return ECONNRESET. The last test is similar but with non-TFO socket. Signed-off-by: Kuniyuki Iwashima Reviewed-by: Willem de Bruijn Link: https://patch.msgid.link/20250927213022.1850048-10-kuniyu@google.com Signed-off-by: Jakub Kicinski