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97b3b8306f
TCP Fast Open cookie is generated in __tcp_fastopen_cookie_gen_cipher(). The cookie value is generated from src/dst IPs and a key configured by setsockopt(TCP_FASTOPEN_KEY) or net.ipv4.tcp_fastopen_key. The default.sh sets net.ipv4.tcp_fastopen_key, and the original packetdrill defines the corresponding cookie as TFO_COOKIE in run_all.py. [0] Then, each test does not need to care about the value, and we can easily update TFO_COOKIE in case __tcp_fastopen_cookie_gen_cipher() changes the algorithm. However, some tests use the bare hex value for specific IPv4 addresses and do not support IPv6. Let's define the same TFO_COOKIE in ksft_runner.sh. We will replace such bare hex values with TFO_COOKIE except for a single test for setsockopt(TCP_FASTOPEN_KEY). Link: https://github.com/google/packetdrill/blob/7230b3990f94/gtests/net/packetdrill/run_all.py#L65 #[0] Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20250927213022.1850048-4-kuniyu@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
65 lines
1.9 KiB
Bash
Executable File
65 lines
1.9 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# Set standard production config values that relate to TCP behavior.
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# Flush old cached data (fastopen cookies).
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ip tcp_metrics flush all > /dev/null 2>&1
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# TCP min, default, and max receive and send buffer sizes.
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sysctl -q net.ipv4.tcp_rmem="4096 540000 $((15*1024*1024))"
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sysctl -q net.ipv4.tcp_wmem="4096 $((256*1024)) 4194304"
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# TCP timestamps.
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sysctl -q net.ipv4.tcp_timestamps=1
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# TCP SYN(ACK) retry thresholds
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sysctl -q net.ipv4.tcp_syn_retries=5
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sysctl -q net.ipv4.tcp_synack_retries=5
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# TCP Forward RTO-Recovery, RFC 5682.
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sysctl -q net.ipv4.tcp_frto=2
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# TCP Selective Acknowledgements (SACK)
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sysctl -q net.ipv4.tcp_sack=1
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# TCP Duplicate Selective Acknowledgements (DSACK)
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sysctl -q net.ipv4.tcp_dsack=1
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# TCP FACK (Forward Acknowldgement)
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sysctl -q net.ipv4.tcp_fack=0
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# TCP reordering degree ("dupthresh" threshold for entering Fast Recovery).
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sysctl -q net.ipv4.tcp_reordering=3
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# TCP congestion control.
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sysctl -q net.ipv4.tcp_congestion_control=cubic
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# TCP slow start after idle.
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sysctl -q net.ipv4.tcp_slow_start_after_idle=0
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# TCP RACK and TLP.
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sysctl -q net.ipv4.tcp_early_retrans=4 net.ipv4.tcp_recovery=1
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# TCP method for deciding when to defer sending to accumulate big TSO packets.
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sysctl -q net.ipv4.tcp_tso_win_divisor=3
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# TCP Explicit Congestion Notification (ECN)
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sysctl -q net.ipv4.tcp_ecn=0
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sysctl -q net.ipv4.tcp_pacing_ss_ratio=200
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sysctl -q net.ipv4.tcp_pacing_ca_ratio=120
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sysctl -q net.ipv4.tcp_notsent_lowat=4294967295 > /dev/null 2>&1
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sysctl -q net.ipv4.tcp_fastopen=0x3
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# Use TFO_COOKIE in ksft_runner.sh for this key.
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sysctl -q net.ipv4.tcp_fastopen_key=a1a1a1a1-b2b2b2b2-c3c3c3c3-d4d4d4d4
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sysctl -q net.ipv4.tcp_syncookies=1
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# Override the default qdisc on the tun device.
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# Many tests fail with timing errors if the default
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# is FQ and that paces their flows.
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tc qdisc add dev tun0 root pfifo
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