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1e42f73fd3
Same as initial tests, import verbatim from github.com/google/packetdrill, aside from: - update `source ./defaults.sh` path to adjust for flat dir - add SPDX headers - remove author statements if any - drop blank lines at EOF (new) Also import set_sysctls.py, which many scripts depend on to set sysctls and then restore them later. This is no longer strictly needed for namespacified sysctl. But not all sysctls are namespacified, and doesn't hurt if they are. Signed-off-by: Willem de Bruijn <willemb@google.com> Acked-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Link: https://patch.msgid.link/20240912005317.1253001-3-willemdebruijn.kernel@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
45 lines
1.6 KiB
Plaintext
45 lines
1.6 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0
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// Fastopen server zerocopy test:
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//
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// send data with MSG_FASTOPEN | MSG_ZEROCOPY and verify that the
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// kernel returns the notification ID.
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`./defaults.sh
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./set_sysctls.py /proc/sys/net/ipv4/tcp_fastopen=0x207`
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// Set up a TFO server listening socket.
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0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
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+.1 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
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+0 bind(3, ..., ...) = 0
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+0 listen(3, 1) = 0
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+0 setsockopt(3, SOL_TCP, TCP_FASTOPEN, [2], 4) = 0
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+0 setsockopt(3, SOL_SOCKET, SO_ZEROCOPY, [1], 4) = 0
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// Client sends a SYN with data.
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+.1 < S 0:1000(1000) win 32792 <mss 1460,sackOK,nop,nop>
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+0 > S. 0:0(0) ack 1001 <mss 1460,nop,nop,sackOK>
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// Server accepts and replies with data.
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+.005 accept(3, ..., ...) = 4
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+0 read(4, ..., 1024) = 1000
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+0 sendto(4, ..., 1000, MSG_ZEROCOPY, ..., ...) = 1000
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+0 > P. 1:1001(1000) ack 1001
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+.05 < . 1001:1001(0) ack 1001 win 32792
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// Read from error queue: now has first zerocopy notification
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+0.1 recvmsg(4, {msg_name(...)=...,
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msg_iov(1)=[{...,0}],
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msg_flags=MSG_ERRQUEUE,
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msg_control=[
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{cmsg_level=CMSG_LEVEL_IP,
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cmsg_type=CMSG_TYPE_RECVERR,
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cmsg_data={ee_errno=0,
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ee_origin=SO_EE_ORIGIN_ZEROCOPY,
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ee_type=0,
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ee_code=SO_EE_CODE_ZEROCOPY_COPIED,
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ee_info=0,
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ee_data=0}}
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]}, MSG_ERRQUEUE) = 0
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`/tmp/sysctl_restore_${PPID}.sh`
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