mirror of https://github.com/torvalds/linux.git
93 lines
3.3 KiB
Plaintext
93 lines
3.3 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0
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// Test that tx timestamping sends timestamps only for
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// the last byte of each sendmsg.
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`./defaults.sh
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`
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// Create a socket and set it to non-blocking.
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0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
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+0 fcntl(3, F_GETFL) = 0x2 (flags O_RDWR)
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+0 fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0
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// Establish connection and verify that there was no error.
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+0 connect(3, ..., ...) = -1 EINPROGRESS (Operation now in progress)
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+0 > S 0:0(0) <mss 1460,sackOK,TS val 100 ecr 0,nop,wscale 8>
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+.01 < S. 0:0(0) ack 1 win 20000 <mss 1000,nop,nop,sackOK>
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+0 > . 1:1(0) ack 1
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+0 getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0
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+0 fcntl(3, F_SETFL, O_RDWR) = 0 // set back to blocking
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+0 setsockopt(3, SOL_SOCKET, SO_TIMESTAMPING,
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[SOF_TIMESTAMPING_TX_SCHED | SOF_TIMESTAMPING_TX_SOFTWARE |
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SOF_TIMESTAMPING_TX_ACK | SOF_TIMESTAMPING_SOFTWARE |
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SOF_TIMESTAMPING_OPT_ID], 4) = 0
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+0 write(3, ..., 11000) = 11000
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+0 > P. 1:10001(10000) ack 1
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+.01 < . 1:1(0) ack 10001 win 4000
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+0 > P. 10001:11001(1000) ack 1
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+.01 < . 1:1(0) ack 11001 win 4000
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// Make sure that internal TCP timestamps are not overwritten and we have sane
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// RTT measurement.
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+0 %{
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assert 5000 <= tcpi_rtt <= 20000, 'srtt=%d us' % tcpi_rtt
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}%
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// SCM_TSTAMP_SCHED for the last byte should be received almost immediately
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// once 10001 is acked at t=20ms.
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// setsockopt(..., [SOF_TIMESTAMPING_SOFTWARE | SOF_TIMESTAMPING_OPT_ID], ...)
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// is called after when SYN is acked. So, we expect the last byte of the first
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// chunk to have a timestamp key of 10999 (i.e., 11000 - 1).
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+0 recvmsg(3, {msg_name(...)=...,
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msg_iov(1)=[{...,0}],
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msg_flags=MSG_ERRQUEUE|MSG_TRUNC,
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msg_control=[
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{cmsg_level=SOL_SOCKET,
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cmsg_type=SCM_TIMESTAMPING,
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cmsg_data={scm_sec=0,scm_nsec=20000000}},
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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=ENOMSG,
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ee_origin=SO_EE_ORIGIN_TIMESTAMPING,
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ee_type=0,
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ee_code=0,
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ee_info=SCM_TSTAMP_SCHED,
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ee_data=10999}}
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]}, MSG_ERRQUEUE) = 0
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// SCM_TSTAMP_SND for the last byte should be received almost immediately
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// once 10001 is acked at t=20ms.
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+0 recvmsg(3, {msg_name(...)=...,
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msg_iov(1)=[{...,0}],
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msg_flags=MSG_ERRQUEUE|MSG_TRUNC,
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msg_control=[
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{cmsg_level=SOL_SOCKET,
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cmsg_type=SCM_TIMESTAMPING,
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cmsg_data={scm_sec=0,scm_nsec=20000000}},
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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=ENOMSG,
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ee_origin=SO_EE_ORIGIN_TIMESTAMPING,
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ee_type=0,
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ee_code=0,
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ee_info=SCM_TSTAMP_SND,
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ee_data=10999}}
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]}, MSG_ERRQUEUE) = 0
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// SCM_TSTAMP_ACK for the last byte should be received at t=30ms.
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+0 recvmsg(3, {msg_name(...)=...,
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msg_iov(1)=[{...,0}],
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msg_flags=MSG_ERRQUEUE|MSG_TRUNC,
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msg_control=[
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{cmsg_level=SOL_SOCKET,
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cmsg_type=SCM_TIMESTAMPING,
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cmsg_data={scm_sec=0,scm_nsec=30000000}},
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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=ENOMSG,
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ee_origin=SO_EE_ORIGIN_TIMESTAMPING,
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ee_type=0,
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ee_code=0,
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ee_info=SCM_TSTAMP_ACK,
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ee_data=10999}}
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]}, MSG_ERRQUEUE) = 0
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