1 // SPDX-License-Identifier: GPL-2.0
2 // small packet zerocopy test:
4 // verify that SO_EE_CODE_ZEROCOPY_COPIED is set on zerocopy
5 // packets of all sizes, including the smallest payload, 1B.
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
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
19 +0 accept(3, ..., ...) = 4
22 +0 send(4, ..., 1, MSG_ZEROCOPY) = 1
24 +0 < . 1:1(0) ack 2 win 257
26 +1 recvmsg(4, {msg_name(...)=...,
28 msg_flags=MSG_ERRQUEUE,
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,
35 ee_code=SO_EE_CODE_ZEROCOPY_COPIED,
41 +0 send(4, ..., 1, MSG_ZEROCOPY) = 1
43 +0 < . 1:1(0) ack 3 win 257
45 +1 recvmsg(4, {msg_name(...)=...,
47 msg_flags=MSG_ERRQUEUE,
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,
54 ee_code=SO_EE_CODE_ZEROCOPY_COPIED,