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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>
57 lines
2.6 KiB
Plaintext
57 lines
2.6 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0
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// Fastopen client 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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//
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// Fastopen requires a stored cookie. Create two sockets. The first
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// one will have no data in the initial send. On return 0 the
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// zerocopy notification counter is not incremented. Verify this too.
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`./defaults.sh`
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// Send a FastOpen request, no cookie yet so no data in SYN
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0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
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+0 fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0
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+0 setsockopt(3, SOL_SOCKET, SO_ZEROCOPY, [1], 4) = 0
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+0 sendto(3, ..., 500, MSG_FASTOPEN|MSG_ZEROCOPY, ..., ...) = -1 EINPROGRESS (Operation now in progress)
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+0 > S 0:0(0) <mss 1460,sackOK,TS val 1000 ecr 0,nop,wscale 8,FO,nop,nop>
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+.01 < S. 123:123(0) ack 1 win 14600 <mss 940,TS val 2000 ecr 1000,sackOK,nop,wscale 6, FO abcd1234,nop,nop>
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+0 > . 1:1(0) ack 1 <nop,nop,TS val 1001 ecr 2000>
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// Read from error queue: no zerocopy notification
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+1 recvmsg(3, {msg_name(...)=...,
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msg_iov(1)=[{...,0}],
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msg_flags=MSG_ERRQUEUE,
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msg_control=[]}, MSG_ERRQUEUE) = -1 EAGAIN (Resource temporarily unavailable)
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+.01 close(3) = 0
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+0 > F. 1:1(0) ack 1 <nop,nop,TS val 1002 ecr 2000>
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+.01 < F. 1:1(0) ack 2 win 92 <nop,nop,TS val 2001 ecr 1002>
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+0 > . 2:2(0) ack 2 <nop,nop,TS val 1003 ecr 2001>
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// Send another Fastopen request, now SYN will have data
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+.07 `sysctl -q net.ipv4.tcp_timestamps=0`
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+.1 socket(..., SOCK_STREAM, IPPROTO_TCP) = 5
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+0 fcntl(5, F_SETFL, O_RDWR|O_NONBLOCK) = 0
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+0 setsockopt(5, SOL_SOCKET, SO_ZEROCOPY, [1], 4) = 0
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+0 sendto(5, ..., 500, MSG_FASTOPEN|MSG_ZEROCOPY, ..., ...) = 500
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+0 > S 0:500(500) <mss 1460,nop,nop,sackOK,nop,wscale 8,FO abcd1234,nop,nop>
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+.05 < S. 5678:5678(0) ack 501 win 14600 <mss 1460,nop,nop,sackOK,nop,wscale 6>
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+0 > . 501:501(0) ack 1
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// Read from error queue: now has first zerocopy notification
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+0.5 recvmsg(5, {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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