1// SPDX-License-Identifier: GPL-2.0 2// send with MSG_ZEROCOPY on a non-established socket 3// 4// verify that a send in state TCP_CLOSE correctly aborts the zerocopy 5// operation, specifically it does not increment the zerocopy counter. 6// 7// First send on a closed socket and wait for (absent) notification. 8// Then connect and send and verify that notification nr. is zero. 9 10--send_omit_free // do not reuse send buffers with zerocopy 11 12`./defaults.sh` 13 14 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 4 15 +0 setsockopt(4, SOL_SOCKET, SO_ZEROCOPY, [1], 4) = 0 16 17 +0 send(4, ..., 4000, MSG_ZEROCOPY) = -1 EPIPE (Broken pipe) 18 19 +0.1 recvmsg(4, {msg_name(...)=..., 20 msg_iov(1)=[{...,0}], 21 msg_flags=MSG_ERRQUEUE, 22 msg_control=[]}, MSG_ERRQUEUE) = -1 EAGAIN (Resource temporarily unavailable) 23 24 +0...0 connect(4, ..., ...) = 0 25 26 +0 > S 0:0(0) <mss 1460,sackOK,TS val 0 ecr 0,nop,wscale 8> 27 +0 < S. 0:0(0) ack 1 win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7> 28 +0 > . 1:1(0) ack 1 29 30 +0 send(4, ..., 4000, MSG_ZEROCOPY) = 4000 31 +0 > P. 1:4001(4000) ack 1 32 +0 < . 1:1(0) ack 4001 win 257 33 34 +0 recvmsg(4, {msg_name(...)=..., 35 msg_iov(1)=[{...,0}], 36 msg_flags=MSG_ERRQUEUE, 37 msg_control=[ 38 {cmsg_level=CMSG_LEVEL_IP, 39 cmsg_type=CMSG_TYPE_RECVERR, 40 cmsg_data={ee_errno=0, 41 ee_origin=SO_EE_ORIGIN_ZEROCOPY, 42 ee_type=0, 43 ee_code=SO_EE_CODE_ZEROCOPY_COPIED, 44 ee_info=0, 45 ee_data=0}} 46 ]}, MSG_ERRQUEUE) = 0 47