1 // SPDX-License-Identifier: GPL-2.0
2 // small packet zerocopy test:
3 //
4 // verify that SO_EE_CODE_ZEROCOPY_COPIED is set on zerocopy
5 // packets of all sizes, including the smallest payload, 1B.
6
7 `./defaults.sh`
8
9 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
10 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
11 +0 setsockopt(3, SOL_SOCKET, SO_ZEROCOPY, [1], 4) = 0
12 +0 bind(3, ..., ...) = 0
13 +0 listen(3, 1) = 0
14
15 +0 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7>
16 +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8>
17 +0 < . 1:1(0) ack 1 win 257
18
19 +0 accept(3, ..., ...) = 4
20
21 // send 1B
22 +0 send(4, ..., 1, MSG_ZEROCOPY) = 1
23 +0 > P. 1:2(1) ack 1
24 +0 < . 1:1(0) ack 2 win 257
25
26 +1 recvmsg(4, {msg_name(...)=...,
27 msg_iov(1)=[{...,0}],
28 msg_flags=MSG_ERRQUEUE,
29 msg_control=[
30 {cmsg_level=CMSG_LEVEL_IP,
31 cmsg_type=CMSG_TYPE_RECVERR,
32 cmsg_data={ee_errno=0,
33 ee_origin=SO_EE_ORIGIN_ZEROCOPY,
34 ee_type=0,
35 ee_code=SO_EE_CODE_ZEROCOPY_COPIED,
36 ee_info=0,
37 ee_data=0}}
38 ]}, MSG_ERRQUEUE) = 0
39
40 // send 1B again
41 +0 send(4, ..., 1, MSG_ZEROCOPY) = 1
42 +0 > P. 2:3(1) ack 1
43 +0 < . 1:1(0) ack 3 win 257
44
45 +1 recvmsg(4, {msg_name(...)=...,
46 msg_iov(1)=[{...,0}],
47 msg_flags=MSG_ERRQUEUE,
48 msg_control=[
49 {cmsg_level=CMSG_LEVEL_IP,
50 cmsg_type=CMSG_TYPE_RECVERR,
51 cmsg_data={ee_errno=0,
52 ee_origin=SO_EE_ORIGIN_ZEROCOPY,
53 ee_type=0,
54 ee_code=SO_EE_CODE_ZEROCOPY_COPIED,
55 ee_info=1,
56 ee_data=1}}
57 ]}, MSG_ERRQUEUE) = 0
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