1*1e42f73fSWillem de Bruijn// SPDX-License-Identifier: GPL-2.0 2*1e42f73fSWillem de Bruijn// epoll zerocopy test: 3*1e42f73fSWillem de Bruijn// 4*1e42f73fSWillem de Bruijn// EPOLLERR is known to be not edge-triggered unlike EPOLLIN and EPOLLOUT but 5*1e42f73fSWillem de Bruijn// it is not level-triggered either. 6*1e42f73fSWillem de Bruijn// 7*1e42f73fSWillem de Bruijn// fire two sends with MSG_ZEROCOPY and receive the acks. confirm that EPOLLERR 8*1e42f73fSWillem de Bruijn// is correctly fired only once, when EPOLLET is set. send another packet with 9*1e42f73fSWillem de Bruijn// MSG_ZEROCOPY. confirm that EPOLLERR is correctly fired again only once. 10*1e42f73fSWillem de Bruijn`./defaults.sh` 11*1e42f73fSWillem de Bruijn 12*1e42f73fSWillem de Bruijn 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 13*1e42f73fSWillem de Bruijn +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 14*1e42f73fSWillem de Bruijn +0 setsockopt(3, SOL_SOCKET, SO_ZEROCOPY, [1], 4) = 0 15*1e42f73fSWillem de Bruijn +0 bind(3, ..., ...) = 0 16*1e42f73fSWillem de Bruijn +0 listen(3, 1) = 0 17*1e42f73fSWillem de Bruijn 18*1e42f73fSWillem de Bruijn +0 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7> 19*1e42f73fSWillem de Bruijn +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8> 20*1e42f73fSWillem de Bruijn +0 < . 1:1(0) ack 1 win 257 21*1e42f73fSWillem de Bruijn 22*1e42f73fSWillem de Bruijn +0 accept(3, ..., ...) = 4 23*1e42f73fSWillem de Bruijn 24*1e42f73fSWillem de Bruijn +0 fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0 25*1e42f73fSWillem de Bruijn +0 epoll_create(1) = 5 26*1e42f73fSWillem de Bruijn +0 epoll_ctl(5, EPOLL_CTL_ADD, 4, {events=EPOLLOUT|EPOLLET, fd=4}) = 0 27*1e42f73fSWillem de Bruijn +0 epoll_wait(5, {events=EPOLLOUT, fd=4}, 1, 0) = 1 28*1e42f73fSWillem de Bruijn 29*1e42f73fSWillem de Bruijn +0 send(4, ..., 4000, MSG_ZEROCOPY) = 4000 30*1e42f73fSWillem de Bruijn +0 > P. 1:4001(4000) ack 1 31*1e42f73fSWillem de Bruijn +0 < . 1:1(0) ack 4001 win 257 32*1e42f73fSWillem de Bruijn 33*1e42f73fSWillem de Bruijn +0 send(4, ..., 4000, MSG_ZEROCOPY) = 4000 34*1e42f73fSWillem de Bruijn +0 > P. 4001:8001(4000) ack 1 35*1e42f73fSWillem de Bruijn +0 < . 1:1(0) ack 8001 win 257 36*1e42f73fSWillem de Bruijn 37*1e42f73fSWillem de Bruijn// receive only one EPOLLERR for the two sends above. 38*1e42f73fSWillem de Bruijn +0 epoll_wait(5, {events=EPOLLERR|EPOLLOUT, fd=4}, 1, 0) = 1 39*1e42f73fSWillem de Bruijn +0 epoll_wait(5, {events=0, ptr=0}, 1, 0) = 0 40*1e42f73fSWillem de Bruijn 41*1e42f73fSWillem de Bruijn +0 send(4, ..., 4000, MSG_ZEROCOPY) = 4000 42*1e42f73fSWillem de Bruijn +0 > P. 8001:12001(4000) ack 1 43*1e42f73fSWillem de Bruijn +0 < . 1:1(0) ack 12001 win 257 44*1e42f73fSWillem de Bruijn 45*1e42f73fSWillem de Bruijn// receive only one EPOLLERR for the third send above. 46*1e42f73fSWillem de Bruijn +0 epoll_wait(5, {events=EPOLLERR|EPOLLOUT, fd=4}, 1, 0) = 1 47*1e42f73fSWillem de Bruijn +0 epoll_wait(5, {events=0, ptr=0}, 1, 0) = 0 48*1e42f73fSWillem de Bruijn 49*1e42f73fSWillem de Bruijn +0 recvmsg(4, {msg_name(...)=..., 50*1e42f73fSWillem de Bruijn msg_iov(1)=[{...,0}], 51*1e42f73fSWillem de Bruijn msg_flags=MSG_ERRQUEUE, 52*1e42f73fSWillem de Bruijn msg_control=[ 53*1e42f73fSWillem de Bruijn {cmsg_level=CMSG_LEVEL_IP, 54*1e42f73fSWillem de Bruijn cmsg_type=CMSG_TYPE_RECVERR, 55*1e42f73fSWillem de Bruijn cmsg_data={ee_errno=0, 56*1e42f73fSWillem de Bruijn ee_origin=SO_EE_ORIGIN_ZEROCOPY, 57*1e42f73fSWillem de Bruijn ee_type=0, 58*1e42f73fSWillem de Bruijn ee_code=SO_EE_CODE_ZEROCOPY_COPIED, 59*1e42f73fSWillem de Bruijn ee_info=0, 60*1e42f73fSWillem de Bruijn ee_data=2}} 61*1e42f73fSWillem de Bruijn ]}, MSG_ERRQUEUE) = 0 62