| // SPDX-License-Identifier: GPL-2.0 |
| // epoll zerocopy test: |
| // |
| // This is a test to confirm that EPOLLERR is only fired once for an FD when |
| // EPOLLONESHOT is set. |
| // |
| // fire two sends with MSG_ZEROCOPY and receive the acks. confirm that EPOLLERR |
| // is correctly fired only once, when EPOLLONESHOT is set. send another packet |
| // with MSG_ZEROCOPY. confirm that EPOLLERR is not fired. Rearm the FD and |
| // confirm that EPOLLERR is correctly set. |
| `./defaults.sh` |
| |
| 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 |
| +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 |
| +0 setsockopt(3, SOL_SOCKET, SO_ZEROCOPY, [1], 4) = 0 |
| +0 bind(3, ..., ...) = 0 |
| +0 listen(3, 1) = 0 |
| |
| +0 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7> |
| +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8> |
| +0 < . 1:1(0) ack 1 win 257 |
| |
| +0 accept(3, ..., ...) = 4 |
| |
| +0 fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0 |
| +0 epoll_create(1) = 5 |
| +0 epoll_ctl(5, EPOLL_CTL_ADD, 4, |
| {events=EPOLLOUT|EPOLLET|EPOLLONESHOT, fd=4}) = 0 |
| |
| +0 send(4, ..., 4000, MSG_ZEROCOPY) = 4000 |
| +0 > P. 1:4001(4000) ack 1 |
| +0 < . 1:1(0) ack 4001 win 257 |
| |
| +0 send(4, ..., 4000, MSG_ZEROCOPY) = 4000 |
| +0 > P. 4001:8001(4000) ack 1 |
| +0 < . 1:1(0) ack 8001 win 257 |
| |
| // receive only one EPOLLERR for the two sends above. |
| +0 epoll_wait(5, {events=EPOLLERR|EPOLLOUT, fd=4}, 1, 0) = 1 |
| +0 epoll_wait(5, {events=0, ptr=0}, 1, 0) = 0 |
| |
| +0 send(4, ..., 4000, MSG_ZEROCOPY) = 4000 |
| +0 > P. 8001:12001(4000) ack 1 |
| +0 < . 1:1(0) ack 12001 win 257 |
| |
| // receive no EPOLLERR for the third send above. |
| +0 epoll_wait(5, {events=0, ptr=0}, 1, 0) = 0 |
| |
| // rearm the FD and verify the EPOLLERR is fired again. |
| +0 epoll_ctl(5, EPOLL_CTL_MOD, 4, {events=EPOLLOUT|EPOLLONESHOT, fd=4}) = 0 |
| +0 epoll_wait(5, {events=EPOLLERR|EPOLLOUT, fd=4}, 1, 0) = 1 |
| +0 epoll_wait(5, {events=0, ptr=0}, 1, 0) = 0 |
| |
| +0 recvmsg(4, {msg_name(...)=..., |
| msg_iov(1)=[{...,0}], |
| msg_flags=MSG_ERRQUEUE, |
| msg_control=[ |
| {cmsg_level=CMSG_LEVEL_IP, |
| cmsg_type=CMSG_TYPE_RECVERR, |
| cmsg_data={ee_errno=0, |
| ee_origin=SO_EE_ORIGIN_ZEROCOPY, |
| ee_type=0, |
| ee_code=SO_EE_CODE_ZEROCOPY_COPIED, |
| ee_info=0, |
| ee_data=2}} |
| ]}, MSG_ERRQUEUE) = 0 |
