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1e42f73fd3
Same as initial tests, import verbatim from github.com/google/packetdrill, aside from: - update `source ./defaults.sh` path to adjust for flat dir - add SPDX headers - remove author statements if any - drop blank lines at EOF (new) Also import set_sysctls.py, which many scripts depend on to set sysctls and then restore them later. This is no longer strictly needed for namespacified sysctl. But not all sysctls are namespacified, and doesn't hurt if they are. Signed-off-by: Willem de Bruijn <willemb@google.com> Acked-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Link: https://patch.msgid.link/20240912005317.1253001-3-willemdebruijn.kernel@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
67 lines
2.5 KiB
Plaintext
67 lines
2.5 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0
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// epoll zerocopy test:
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//
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// This is a test to confirm that EPOLLERR is only fired once for an FD when
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// EPOLLONESHOT is set.
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//
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// fire two sends with MSG_ZEROCOPY and receive the acks. confirm that EPOLLERR
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// is correctly fired only once, when EPOLLONESHOT is set. send another packet
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// with MSG_ZEROCOPY. confirm that EPOLLERR is not fired. Rearm the FD and
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// confirm that EPOLLERR is correctly set.
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`./defaults.sh`
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0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
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+0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
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+0 setsockopt(3, SOL_SOCKET, SO_ZEROCOPY, [1], 4) = 0
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+0 bind(3, ..., ...) = 0
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+0 listen(3, 1) = 0
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+0 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7>
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+0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8>
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+0 < . 1:1(0) ack 1 win 257
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+0 accept(3, ..., ...) = 4
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+0 fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0
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+0 epoll_create(1) = 5
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+0 epoll_ctl(5, EPOLL_CTL_ADD, 4,
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{events=EPOLLOUT|EPOLLET|EPOLLONESHOT, fd=4}) = 0
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+0 send(4, ..., 4000, MSG_ZEROCOPY) = 4000
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+0 > P. 1:4001(4000) ack 1
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+0 < . 1:1(0) ack 4001 win 257
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+0 send(4, ..., 4000, MSG_ZEROCOPY) = 4000
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+0 > P. 4001:8001(4000) ack 1
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+0 < . 1:1(0) ack 8001 win 257
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// receive only one EPOLLERR for the two sends above.
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+0 epoll_wait(5, {events=EPOLLERR|EPOLLOUT, fd=4}, 1, 0) = 1
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+0 epoll_wait(5, {events=0, ptr=0}, 1, 0) = 0
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+0 send(4, ..., 4000, MSG_ZEROCOPY) = 4000
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+0 > P. 8001:12001(4000) ack 1
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+0 < . 1:1(0) ack 12001 win 257
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// receive no EPOLLERR for the third send above.
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+0 epoll_wait(5, {events=0, ptr=0}, 1, 0) = 0
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// rearm the FD and verify the EPOLLERR is fired again.
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+0 epoll_ctl(5, EPOLL_CTL_MOD, 4, {events=EPOLLOUT|EPOLLONESHOT, fd=4}) = 0
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+0 epoll_wait(5, {events=EPOLLERR|EPOLLOUT, fd=4}, 1, 0) = 1
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+0 epoll_wait(5, {events=0, ptr=0}, 1, 0) = 0
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+0 recvmsg(4, {msg_name(...)=...,
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msg_iov(1)=[{...,0}],
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msg_flags=MSG_ERRQUEUE,
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msg_control=[
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{cmsg_level=CMSG_LEVEL_IP,
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cmsg_type=CMSG_TYPE_RECVERR,
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cmsg_data={ee_errno=0,
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ee_origin=SO_EE_ORIGIN_ZEROCOPY,
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ee_type=0,
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ee_code=SO_EE_CODE_ZEROCOPY_COPIED,
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ee_info=0,
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ee_data=2}}
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]}, MSG_ERRQUEUE) = 0
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