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88395c071f
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 Same test process as previous tests. Both with and without debug mode. Recording the steps once: make mrproper vng --build \ --config tools/testing/selftests/net/packetdrill/config \ --config kernel/configs/debug.config vng -v --run . --user root --cpus 4 -- \ make -C tools/testing/selftests TARGETS=net/packetdrill run_tests Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Soham Chakradeo <sohamch@google.com> Link: https://patch.msgid.link/20241217185203.297935-2-sohamch.kernel@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
39 lines
1.6 KiB
Plaintext
39 lines
1.6 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0
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// Test send-buffer-limited time in tcp_info for client side.
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`./defaults.sh`
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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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+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 10000 <mss 1000,sackOK,nop,nop,nop,wscale 8>
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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_SNDBUF, [10000], 4) = 0
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+0 getsockopt(3, SOL_SOCKET, SO_SNDBUF, [20000], [4]) = 0
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+.09...0.14 write(3, ..., 150000) = 150000
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+.01 < . 1:1(0) ack 10001 win 10000
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+.01 < . 1:1(0) ack 30001 win 10000
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// cwnd goes from 40(60KB) to 80(120KB), and that we hit the tiny sndbuf limit 10KB
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+.01 < . 1:1(0) ack 70001 win 10000
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+.02 < . 1:1(0) ack 95001 win 10000
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+0 %{ assert 19000 <= tcpi_sndbuf_limited <= 21000, tcpi_sndbuf_limited; \
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assert 49000 <= tcpi_busy_time <= 52000, tcpi_busy_time; \
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assert 0 == tcpi_rwnd_limited, tcpi_rwnd_limited }%
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// This ack frees up enough buffer so we are no longer
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// buffer limited (socket flag SOCK_NOSPACE is cleared)
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+.02 < . 1:1(0) ack 150001 win 10000
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+0 %{ assert 19000 <= tcpi_sndbuf_limited <= 21000, tcpi_sndbuf_limited;\
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assert 69000 <= tcpi_busy_time <= 73000, tcpi_busy_time;\
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assert 0 == tcpi_rwnd_limited, tcpi_rwnd_limited }%
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