diff options
| author | Kuniyuki Iwashima <kuniyu@google.com> | 2025-09-15 17:56:47 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-09-17 16:01:52 -0700 |
| commit | 1fd0362262baff9381615a5b346298abbc165ba3 (patch) | |
| tree | 81c0200188f277a08e2c3acc928c69fe3ba95a6f | |
| parent | 45c8a6cc2bcd780e634a6ba8e46bffbdf1fc5c01 (diff) | |
selftest: packetdrill: Add tcp_fastopen_server_reset-after-disconnect.pkt.
The test reproduces the scenario explained in the previous patch.
Without the patch, the test triggers the warning and cannot see the last
retransmitted packet.
# ./ksft_runner.sh tcp_fastopen_server_reset-after-disconnect.pkt
TAP version 13
1..2
[ 29.229250] ------------[ cut here ]------------
[ 29.231414] WARNING: CPU: 26 PID: 0 at net/ipv4/tcp_timer.c:542 tcp_retransmit_timer+0x32/0x9f0
...
tcp_fastopen_server_reset-after-disconnect.pkt:26: error handling packet: Timed out waiting for packet
not ok 1 ipv4
tcp_fastopen_server_reset-after-disconnect.pkt:26: error handling packet: Timed out waiting for packet
not ok 2 ipv6
# Totals: pass:0 fail:2 xfail:0 xpass:0 skip:0 error:0
Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250915175800.118793-3-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | tools/testing/selftests/net/packetdrill/tcp_fastopen_server_reset-after-disconnect.pkt | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/tools/testing/selftests/net/packetdrill/tcp_fastopen_server_reset-after-disconnect.pkt b/tools/testing/selftests/net/packetdrill/tcp_fastopen_server_reset-after-disconnect.pkt new file mode 100644 index 000000000000..26794e7ddfd5 --- /dev/null +++ b/tools/testing/selftests/net/packetdrill/tcp_fastopen_server_reset-after-disconnect.pkt @@ -0,0 +1,26 @@ +// SPDX-License-Identifier: GPL-2.0 +`./defaults.sh + ./set_sysctls.py /proc/sys/net/ipv4/tcp_fastopen=0x602 /proc/sys/net/ipv4/tcp_timestamps=0` + + 0 socket(..., SOCK_STREAM|SOCK_NONBLOCK, IPPROTO_TCP) = 3 + +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 + +0 bind(3, ..., ...) = 0 + +0 listen(3, 1) = 0 + + +0 < S 0:10(10) win 32792 <mss 1460,nop,nop,sackOK> + +0 > S. 0:0(0) ack 11 win 65535 <mss 1460,nop,nop,sackOK> + +// sk->sk_state is TCP_SYN_RECV + +.1 accept(3, ..., ...) = 4 + +// tcp_disconnect() sets sk->sk_state to TCP_CLOSE + +0 connect(4, AF_UNSPEC, ...) = 0 + +0 > R. 1:1(0) ack 11 win 65535 + +// connect() sets sk->sk_state to TCP_SYN_SENT + +0 fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0 + +0 connect(4, ..., ...) = -1 EINPROGRESS (Operation is now in progress) + +0 > S 0:0(0) win 65535 <mss 1460,nop,nop,sackOK,nop,wscale 8> + +// tp->fastopen_rsk must be NULL + +1 > S 0:0(0) win 65535 <mss 1460,nop,nop,sackOK,nop,wscale 8> |