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 58