Commit 5d4cadef authored by Soham Chakradeo's avatar Soham Chakradeo Committed by Jakub Kicinski
Browse files

selftests/net: packetdrill: import tcp/user_timeout, tcp/validate,... 


selftests/net: packetdrill: import tcp/user_timeout, tcp/validate, tcp/sendfile, tcp/limited-transmit, tcp/syscall_bad_arg

Use the standard import and testing method, as described in the
import of tcp/ecn and tcp/close , tcp/sack , tcp/tcp_info.

Signed-off-by: default avatarWillem de Bruijn <willemb@google.com>
Signed-off-by: default avatarSoham Chakradeo <sohamch@google.com>
Link: https://patch.msgid.link/20241217185203.297935-5-sohamch.kernel@gmail.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 6f669205

tools/testing/selftests/net/packetdrill/tcp_limited_transmit_limited-transmit-no-sack.pkt

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// SPDX-License-Identifier: GPL-2.0

// Test RFC 3042 "Limited Transmit": "sending a new data segment in

// response to each of the first two duplicate acknowledgments that

// arrive at the sender".

// This variation tests a receiver that doesn't support SACK.



`./defaults.sh`



// Establish a connection.

    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



  +.1 < S 0:0(0) win 32792 <mss 1000,nop,wscale 7>

   +0 > S. 0:0(0) ack 1 <mss 1460,nop,wscale 8>

  +.1 < . 1:1(0) ack 1 win 320

   +0 accept(3, ..., ...) = 4



// Write some data, and send the initial congestion window.

   +0 write(4, ..., 15000) = 15000

   +0 > P. 1:10001(10000) ack 1



// Limited transmit: on first dupack, send a new data segment.

 +.11 < . 1:1(0) ack 1 win 320

   +0 > . 10001:11001(1000) ack 1



// Limited transmit: on second dupack, send a new data segment.

 +.01 < . 1:1(0) ack 1 win 320

   +0 > . 11001:12001(1000) ack 1



// It turned out to be reordering, not loss.

// We have one packet newly acked (1001:3001 were DUP-ACK'd)

// So we revert state back to Open. Slow start cwnd from 10 to 11

// and send 11 - 9 = 2 packets

 +.01 < . 1:1(0) ack 3001 win 320

   +0 > P. 12001:14001(2000) ack 1



 +.02 < . 1:1(0) ack 5001 win 320

   +0 > P. 14001:15001(1000) ack 1



// Client gradually ACKs all data.

 +.02 < . 1:1(0) ack 7001 win 320

 +.02 < . 1:1(0) ack 9001 win 320

 +.02 < . 1:1(0) ack 11001 win 320

 +.02 < . 1:1(0) ack 13001 win 320

 +.02 < . 1:1(0) ack 15001 win 320



// Clean up.

 +.17 close(4) = 0

   +0 > F. 15001:15001(0) ack 1

  +.1 < F. 1:1(0) ack 15002 win 257

   +0 > . 15002:15002(0) ack 2

tools/testing/selftests/net/packetdrill/tcp_limited_transmit_limited-transmit-sack.pkt

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// SPDX-License-Identifier: GPL-2.0

// Test RFC 3042 "Limited Transmit": "sending a new data segment in

// response to each of the first two duplicate acknowledgments that

// arrive at the sender".

// This variation tests a receiver that supports SACK.



`./defaults.sh`



// Establish a connection.

    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



  +.1 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7>

   +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8>

  +.1 < . 1:1(0) ack 1 win 320

   +0 accept(3, ..., ...) = 4



// Write some data, and send the initial congestion window.

   +0 write(4, ..., 15000) = 15000

   +0 > P. 1:10001(10000) ack 1



// Limited transmit: on first dupack, send a new data segment.

 +.11 < . 1:1(0) ack 1 win 320 <sack 1001:2001,nop,nop>

   +0 > . 10001:11001(1000) ack 1



// Limited transmit: on second dupack, send a new data segment.

 +.01 < . 1:1(0) ack 1 win 320 <sack 1001:3001,nop,nop>

   +0 > . 11001:12001(1000) ack 1



// It turned out to be reordering, not loss.

 +.01 < . 1:1(0) ack 3001 win 320

   +0 > P. 12001:14001(2000) ack 1



 +.02 < . 1:1(0) ack 5001 win 320

   +0 > P. 14001:15001(1000) ack 1



// Client gradually ACKs all data.

 +.02 < . 1:1(0) ack 7001 win 320

 +.02 < . 1:1(0) ack 9001 win 320

 +.02 < . 1:1(0) ack 11001 win 320

 +.02 < . 1:1(0) ack 13001 win 320

 +.02 < . 1:1(0) ack 15001 win 320



// Clean up.

 +.17 close(4) = 0

   +0 > F. 15001:15001(0) ack 1

  +.1 < F. 1:1(0) ack 15002 win 257

   +0 > . 15002:15002(0) ack 2

tools/testing/selftests/net/packetdrill/tcp_sendfile_sendfile-simple.pkt

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// SPDX-License-Identifier: GPL-2.0

// Simplest possible test of open() and then sendfile().

// We write some zeroes into a file (since packetdrill expects payloads

// to be all zeroes) and then open() the file, then use sendfile()

// and verify that the correct number of zeroes goes out.



`./defaults.sh

/bin/rm -f /tmp/testfile

/bin/dd bs=1 count=5 if=/dev/zero of=/tmp/testfile status=none

`



// Initialize connection

    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 32792 <mss 1000,sackOK,nop,nop,nop,wscale 10>

   +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8>

   +0 < . 1:1(0) ack 1 win 514



   +0 accept(3, ..., ...) = 4



   +0 open("/tmp/testfile", O_RDONLY) = 5

   +0 sendfile(4, 5, [0], 5) = 5

   +0 > P. 1:6(5) ack 1

tools/testing/selftests/net/packetdrill/tcp_syscall_bad_arg_fastopen-invalid-buf-ptr.pkt

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// SPDX-License-Identifier: GPL-2.0

// Test TCP fastopen behavior with NULL as buffer pointer, but a non-zero

// buffer length.

`./defaults.sh

./set_sysctls.py /proc/sys/net/ipv4/tcp_timestamps=0`



// Cache warmup: send a Fast Open cookie request

 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3

+0 fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0

+0 setsockopt(3, SOL_TCP, TCP_FASTOPEN_CONNECT, [1], 4) = 0

+0 connect(3, ..., ...) = -1 EINPROGRESS (Operation is now in progress)

+0 > S 0:0(0) <mss 1460,nop,nop,sackOK,nop,wscale 8,FO,nop,nop>

+0 < S. 123:123(0) ack 1 win 14600 <mss 1460,nop,nop,sackOK,nop,wscale 6,FO abcd1234,nop,nop>

+0 > . 1:1(0) ack 1

+0 close(3) = 0

+0 > F. 1:1(0) ack 1

+0 < F. 1:1(0) ack 2 win 92

+0 > .  2:2(0) ack 2



// Test with MSG_FASTOPEN without TCP_FASTOPEN_CONNECT.

+0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 4

+0 fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0

+0 sendto(4, NULL, 1, MSG_FASTOPEN, ..., ...) = -1

+0 close(4) = 0



// Test with TCP_FASTOPEN_CONNECT without MSG_FASTOPEN.

+0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 5

+0 fcntl(5, F_SETFL, O_RDWR|O_NONBLOCK) = 0

+0 setsockopt(5, SOL_TCP, TCP_FASTOPEN_CONNECT, [1], 4) = 0

+0 connect(5, ..., ...) = 0

+0 sendto(5, NULL, 1, 0, ..., ...) = -1

+0 close(5) = 0



// Test with both TCP_FASTOPEN_CONNECT and MSG_FASTOPEN.

+0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 6

+0 fcntl(6, F_SETFL, O_RDWR|O_NONBLOCK) = 0

+0 setsockopt(6, SOL_TCP, TCP_FASTOPEN_CONNECT, [1], 4) = 0

+0 connect(6, ..., ...) = 0

+0 sendto(6, NULL, 1, MSG_FASTOPEN, ..., ...) = -1

+0 close(6) = 0



`/tmp/sysctl_restore_${PPID}.sh`

tools/testing/selftests/net/packetdrill/tcp_syscall_bad_arg_sendmsg-empty-iov.pkt

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// SPDX-License-Identifier: GPL-2.0

// Test that we correctly skip zero-length IOVs.

`./defaults.sh`

    0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3

   +0 setsockopt(3, SOL_SOCKET, SO_ZEROCOPY, [1], 4) = 0

   +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 32792 <mss 1000,nop,wscale 7>

   +0 > S. 0:0(0) ack 1 <mss 1460,nop,wscale 8>

 +.01 < . 1:1(0) ack 1 win 257

   +0 accept(3, ..., ...) = 4

   +0 setsockopt(4, SOL_TCP, TCP_NODELAY, [1], 4) = 0



   +0 sendmsg(4, {msg_name(...)=...,

                  msg_iov(4)=[{..., 0}, {..., 40}, {..., 0}, {..., 20}],

                  msg_flags=0}, 0) = 60

   +0 > P. 1:61(60) ack 1

 +.01 < . 1:1(0) ack 61 win 257



   +0 sendmsg(4, {msg_name(...)=...,

                  msg_iov(4)=[{..., 0}, {..., 0}, {..., 0}, {..., 0}],

                  msg_flags=0}, MSG_ZEROCOPY) = 0



   +0 sendmsg(4, {msg_name(...)=...,

                  msg_iov(4)=[{..., 0}, {..., 10}, {..., 0}, {..., 50}],

                  msg_flags=0}, MSG_ZEROCOPY) = 60

   +0 > P. 61:121(60) ack 1

 +.01 < . 1:1(0) ack 121 win 257