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| author | Eric Dumazet <edumazet@google.com> | 2025-07-11 14:40:03 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-07-15 04:41:43 +0300 |
| commit | 445e0cc38d498e341f36f2e3a9cacf1ddf0b09b6 (patch) | |
| tree | 5519755bcdd028be5504657cf9ce01b80d6c169a | |
| parent | 38d7e444336567bae1c7b21fc18b7ceaaa5643a0 (diff) | |
| download | linux-445e0cc38d498e341f36f2e3a9cacf1ddf0b09b6.tar.xz | |
selftests/net: packetdrill: add tcp_ooo_rcv_mss.pkt
We make sure tcpi_rcv_mss and tp->scaling_ratio
are correctly updated if no in-order packet has been received yet.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250711114006.480026-6-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | tools/testing/selftests/net/packetdrill/tcp_ooo_rcv_mss.pkt | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/tools/testing/selftests/net/packetdrill/tcp_ooo_rcv_mss.pkt b/tools/testing/selftests/net/packetdrill/tcp_ooo_rcv_mss.pkt new file mode 100644 index 000000000000..7e6bc5fb0c8d --- /dev/null +++ b/tools/testing/selftests/net/packetdrill/tcp_ooo_rcv_mss.pkt @@ -0,0 +1,27 @@ +// SPDX-License-Identifier: GPL-2.0 + +--mss=1000 + +`./defaults.sh +sysctl -q net.ipv4.tcp_rmem="4096 131072 $((32*1024*1024))"` + + +0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 + +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 + +0 bind(3, ..., ...) = 0 + +0 listen(3, 1) = 0 + + +0 < S 0:0(0) win 65535 <mss 1000,nop,nop,sackOK,nop,wscale 7> + +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 10> + +.1 < . 1:1(0) ack 1 win 257 + + +0 accept(3, ..., ...) = 4 + + +0 < . 2001:11001(9000) ack 1 win 257 + +0 > . 1:1(0) ack 1 win 81 <nop,nop,sack 2001:11001> + +// check that ooo packet properly updates tcpi_rcv_mss + +0 %{ assert tcpi_rcv_mss == 1000, tcpi_rcv_mss }% + + +0 < . 11001:21001(10000) ack 1 win 257 + +0 > . 1:1(0) ack 1 win 81 <nop,nop,sack 2001:21001> + |