1// SPDX-License-Identifier: GPL-2.0 2// basic zerocopy test: 3// 4// send a packet with MSG_ZEROCOPY and receive the notification ID 5// repeat and verify IDs are consecutive 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 +0 send(4, ..., 4000, MSG_ZEROCOPY) = 4000 22 +0 > P. 1:4001(4000) ack 1 23 +0 < . 1:1(0) ack 4001 win 257 24 25 +0 recvmsg(4, {msg_name(...)=..., 26 msg_iov(1)=[{...,0}], 27 msg_flags=MSG_ERRQUEUE, 28 msg_control=[ 29 {cmsg_level=CMSG_LEVEL_IP, 30 cmsg_type=CMSG_TYPE_RECVERR, 31 cmsg_data={ee_errno=0, 32 ee_origin=SO_EE_ORIGIN_ZEROCOPY, 33 ee_type=0, 34 ee_code=SO_EE_CODE_ZEROCOPY_COPIED, 35 ee_info=0, 36 ee_data=0}} 37 ]}, MSG_ERRQUEUE) = 0 38 39 +0 send(4, ..., 4000, MSG_ZEROCOPY) = 4000 40 +0 > P. 4001:8001(4000) ack 1 41 +0 < . 1:1(0) ack 8001 win 257 42 43 +0 recvmsg(4, {msg_name(...)=..., 44 msg_iov(1)=[{...,0}], 45 msg_flags=MSG_ERRQUEUE, 46 msg_control=[ 47 {cmsg_level=CMSG_LEVEL_IP, 48 cmsg_type=CMSG_TYPE_RECVERR, 49 cmsg_data={ee_errno=0, 50 ee_origin=SO_EE_ORIGIN_ZEROCOPY, 51 ee_type=0, 52 ee_code=SO_EE_CODE_ZEROCOPY_COPIED, 53 ee_info=1, 54 ee_data=1}} 55 ]}, MSG_ERRQUEUE) = 0 56