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1// SPDX-License-Identifier: GPL-2.02// small packet zerocopy test:3//4// verify that SO_EE_CODE_ZEROCOPY_COPIED is set on zerocopy5// packets of all sizes, including the smallest payload, 1B.6 7`./defaults.sh`8 9 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 310 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 011 +0 setsockopt(3, SOL_SOCKET, SO_ZEROCOPY, [1], 4) = 012 +0 bind(3, ..., ...) = 013 +0 listen(3, 1) = 014 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 25718 19 +0 accept(3, ..., ...) = 420 21 // send 1B22 +0 send(4, ..., 1, MSG_ZEROCOPY) = 123 +0 > P. 1:2(1) ack 124 +0 < . 1:1(0) ack 2 win 25725 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) = 039 40 // send 1B again41 +0 send(4, ..., 1, MSG_ZEROCOPY) = 142 +0 > P. 2:3(1) ack 143 +0 < . 1:1(0) ack 3 win 25744 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) = 058