forked from cloudwego/netpoll
/
poll_default_linux_test.go
330 lines (301 loc) · 9.88 KB
/
poll_default_linux_test.go
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// Copyright 2022 CloudWeGo Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build linux
// +build linux
package netpoll
import (
"errors"
"syscall"
"testing"
"golang.org/x/sys/unix"
)
func TestEpollEvent(t *testing.T) {
var epollfd, err = EpollCreate(0)
MustNil(t, err)
defer syscall.Close(epollfd)
rfd, wfd := GetSysFdPairs()
defer syscall.Close(rfd)
defer syscall.Close(wfd)
send := []byte("hello")
recv := make([]byte, 5)
events := make([]epollevent, 128)
eventdata1 := [8]byte{0, 0, 0, 0, 0, 0, 0, 1}
eventdata2 := [8]byte{0, 0, 0, 0, 0, 0, 0, 2}
eventdata3 := [8]byte{0, 0, 0, 0, 0, 0, 0, 3}
event1 := &epollevent{
events: syscall.EPOLLIN,
data: eventdata1,
}
event2 := &epollevent{
events: syscall.EPOLLIN,
data: eventdata2,
}
event3 := &epollevent{
events: syscall.EPOLLIN | syscall.EPOLLOUT,
data: eventdata3,
}
// EPOLL: add ,del and add
err = EpollCtl(epollfd, unix.EPOLL_CTL_ADD, rfd, event1)
MustNil(t, err)
err = EpollCtl(epollfd, unix.EPOLL_CTL_DEL, rfd, event1)
MustNil(t, err)
err = EpollCtl(epollfd, unix.EPOLL_CTL_ADD, rfd, event2)
MustNil(t, err)
_, err = syscall.Write(wfd, send)
MustNil(t, err)
n, err := EpollWait(epollfd, events, -1)
MustNil(t, err)
Equal(t, n, 1)
Equal(t, events[0].data, eventdata2)
_, err = syscall.Read(rfd, recv)
MustTrue(t, err == nil && string(recv) == string(send))
err = EpollCtl(epollfd, unix.EPOLL_CTL_DEL, rfd, event2)
MustNil(t, err)
// EPOLL: add ,mod and mod
err = EpollCtl(epollfd, unix.EPOLL_CTL_ADD, rfd, event1)
MustNil(t, err)
err = EpollCtl(epollfd, unix.EPOLL_CTL_MOD, rfd, event2)
MustNil(t, err)
err = EpollCtl(epollfd, unix.EPOLL_CTL_MOD, rfd, event3)
MustNil(t, err)
_, err = syscall.Write(wfd, send)
MustNil(t, err)
n, err = EpollWait(epollfd, events, -1)
MustNil(t, err)
Equal(t, events[0].data, eventdata3)
_, err = syscall.Read(rfd, recv)
MustTrue(t, err == nil && string(recv) == string(send))
Assert(t, events[0].events&syscall.EPOLLIN != 0)
Assert(t, events[0].events&syscall.EPOLLOUT != 0)
err = EpollCtl(epollfd, unix.EPOLL_CTL_DEL, rfd, event2)
MustNil(t, err)
}
func TestEpollWait(t *testing.T) {
var epollfd, err = EpollCreate(0)
MustNil(t, err)
defer syscall.Close(epollfd)
rfd, wfd := GetSysFdPairs()
defer syscall.Close(wfd)
send := []byte("hello")
recv := make([]byte, 5)
events := make([]epollevent, 128)
eventdata := [8]byte{0, 0, 0, 0, 0, 0, 0, 1}
// EPOLL: init state
event := &epollevent{
events: syscall.EPOLLIN | syscall.EPOLLOUT | syscall.EPOLLRDHUP | syscall.EPOLLERR,
data: eventdata,
}
err = EpollCtl(epollfd, unix.EPOLL_CTL_ADD, rfd, event)
MustNil(t, err)
_, err = EpollWait(epollfd, events, -1)
MustNil(t, err)
Assert(t, events[0].events&syscall.EPOLLIN == 0)
Assert(t, events[0].events&syscall.EPOLLOUT != 0)
// EPOLL: readable
_, err = syscall.Write(wfd, send)
MustNil(t, err)
_, err = EpollWait(epollfd, events, -1)
MustNil(t, err)
Assert(t, events[0].events&syscall.EPOLLIN != 0)
Assert(t, events[0].events&syscall.EPOLLOUT != 0)
_, err = syscall.Read(rfd, recv)
MustTrue(t, err == nil && string(recv) == string(send))
// EPOLL: read finished
_, err = EpollWait(epollfd, events, -1)
MustNil(t, err)
Assert(t, events[0].events&syscall.EPOLLIN == 0)
Assert(t, events[0].events&syscall.EPOLLOUT != 0)
// EPOLL: close peer fd
err = syscall.Close(wfd)
MustNil(t, err)
_, err = EpollWait(epollfd, events, -1)
MustNil(t, err)
Assert(t, events[0].events&syscall.EPOLLIN != 0)
Assert(t, events[0].events&syscall.EPOLLOUT != 0)
Assert(t, events[0].events&syscall.EPOLLRDHUP != 0)
Assert(t, events[0].events&syscall.EPOLLERR == 0)
// EPOLL: close current fd
rfd2, wfd2 := GetSysFdPairs()
defer syscall.Close(wfd2)
err = EpollCtl(epollfd, unix.EPOLL_CTL_ADD, rfd2, event)
err = syscall.Close(rfd2)
MustNil(t, err)
_, err = EpollWait(epollfd, events, -1)
MustNil(t, err)
Assert(t, events[0].events&syscall.EPOLLIN != 0)
Assert(t, events[0].events&syscall.EPOLLOUT != 0)
Assert(t, events[0].events&syscall.EPOLLRDHUP != 0)
Assert(t, events[0].events&syscall.EPOLLERR == 0)
err = EpollCtl(epollfd, unix.EPOLL_CTL_DEL, rfd, event)
MustNil(t, err)
}
func TestEpollETClose(t *testing.T) {
var epollfd, err = EpollCreate(0)
MustNil(t, err)
defer syscall.Close(epollfd)
rfd, wfd := GetSysFdPairs()
events := make([]epollevent, 128)
eventdata := [8]byte{0, 0, 0, 0, 0, 0, 0, 1}
event := &epollevent{
events: EPOLLET | syscall.EPOLLIN | syscall.EPOLLOUT | syscall.EPOLLRDHUP | syscall.EPOLLERR,
data: eventdata,
}
// EPOLL: init state
err = EpollCtl(epollfd, unix.EPOLL_CTL_ADD, rfd, event)
_, err = EpollWait(epollfd, events, -1)
MustNil(t, err)
Assert(t, events[0].events&syscall.EPOLLIN == 0)
Assert(t, events[0].events&syscall.EPOLLOUT != 0)
Assert(t, events[0].events&syscall.EPOLLRDHUP == 0)
Assert(t, events[0].events&syscall.EPOLLERR == 0)
// EPOLL: close current fd
// nothing will happen
err = syscall.Close(rfd)
MustNil(t, err)
n, err := EpollWait(epollfd, events, 100)
MustNil(t, err)
Assert(t, n == 0, n)
err = syscall.Close(wfd)
MustNil(t, err)
// EPOLL: close peer fd
// EPOLLIN and EPOLLOUT
rfd, wfd = GetSysFdPairs()
err = EpollCtl(epollfd, unix.EPOLL_CTL_ADD, rfd, event)
err = syscall.Close(wfd)
MustNil(t, err)
n, err = EpollWait(epollfd, events, 100)
MustNil(t, err)
Assert(t, n == 1, n)
Assert(t, events[0].events&syscall.EPOLLIN != 0)
Assert(t, events[0].events&syscall.EPOLLOUT != 0)
Assert(t, events[0].events&syscall.EPOLLRDHUP != 0)
Assert(t, events[0].events&syscall.EPOLLERR == 0)
buf := make([]byte, 1024)
ivs := make([]syscall.Iovec, 1)
n, err = ioread(rfd, [][]byte{buf}, ivs) // EOF
Assert(t, n == 0 && errors.Is(err, ErrEOF), n, err)
}
func TestEpollETDel(t *testing.T) {
var epollfd, err = EpollCreate(0)
MustNil(t, err)
defer syscall.Close(epollfd)
rfd, wfd := GetSysFdPairs()
send := []byte("hello")
events := make([]epollevent, 128)
eventdata := [8]byte{0, 0, 0, 0, 0, 0, 0, 1}
event := &epollevent{
events: EPOLLET | syscall.EPOLLIN | syscall.EPOLLRDHUP | syscall.EPOLLERR,
data: eventdata,
}
// EPOLL: del partly
err = EpollCtl(epollfd, unix.EPOLL_CTL_ADD, rfd, event)
MustNil(t, err)
event.events = syscall.EPOLLIN | syscall.EPOLLOUT | syscall.EPOLLRDHUP | syscall.EPOLLERR
err = EpollCtl(epollfd, unix.EPOLL_CTL_DEL, rfd, event)
MustNil(t, err)
_, err = syscall.Write(wfd, send)
MustNil(t, err)
_, err = EpollWait(epollfd, events, 100)
MustNil(t, err)
Assert(t, events[0].events&syscall.EPOLLIN == 0)
Assert(t, events[0].events&syscall.EPOLLRDHUP == 0)
Assert(t, events[0].events&syscall.EPOLLERR == 0)
}
func TestEpollConnectSameFD(t *testing.T) {
var epollfd, err = EpollCreate(0)
MustNil(t, err)
defer syscall.Close(epollfd)
events := make([]epollevent, 128)
eventdata1 := [8]byte{0, 0, 0, 0, 0, 0, 0, 1}
eventdata2 := [8]byte{0, 0, 0, 0, 0, 0, 0, 2}
event1 := &epollevent{
events: EPOLLET | syscall.EPOLLOUT | syscall.EPOLLRDHUP | syscall.EPOLLERR,
data: eventdata1,
}
event2 := &epollevent{
events: EPOLLET | syscall.EPOLLOUT | syscall.EPOLLRDHUP | syscall.EPOLLERR,
data: eventdata2,
}
eventin := &epollevent{
events: syscall.EPOLLIN | syscall.EPOLLRDHUP | syscall.EPOLLERR,
data: eventdata1,
}
addr := syscall.SockaddrInet4{
Port: 53,
Addr: [4]byte{8, 8, 8, 8},
}
// connect non-block socket
fd1, err := syscall.Socket(syscall.AF_INET, syscall.SOCK_STREAM, syscall.IPPROTO_TCP)
MustNil(t, err)
t.Logf("create fd: %d", fd1)
err = syscall.SetNonblock(fd1, true)
MustNil(t, err)
err = EpollCtl(epollfd, unix.EPOLL_CTL_ADD, fd1, event1)
MustNil(t, err)
err = syscall.Connect(fd1, &addr)
t.Log(err)
_, err = EpollWait(epollfd, events, -1)
MustNil(t, err)
Assert(t, events[0].events&syscall.EPOLLOUT != 0)
Assert(t, events[0].events&syscall.EPOLLRDHUP == 0)
Assert(t, events[0].events&syscall.EPOLLERR == 0)
// forget to del fd
//err = EpollCtl(epollfd, unix.EPOLL_CTL_DEL, fd1, event1)
//MustNil(t, err)
err = syscall.Close(fd1) // close fd1
MustNil(t, err)
// connect non-block socket with same fd
fd2, err := syscall.Socket(syscall.AF_INET, syscall.SOCK_STREAM, syscall.IPPROTO_TCP)
MustNil(t, err)
t.Logf("create fd: %d", fd2)
err = syscall.SetNonblock(fd2, true)
MustNil(t, err)
err = EpollCtl(epollfd, unix.EPOLL_CTL_ADD, fd2, event2)
MustNil(t, err)
err = syscall.Connect(fd2, &addr)
t.Log(err)
_, err = EpollWait(epollfd, events, -1)
MustNil(t, err)
Assert(t, events[0].events&syscall.EPOLLOUT != 0)
Assert(t, events[0].events&syscall.EPOLLRDHUP == 0)
Assert(t, events[0].events&syscall.EPOLLERR == 0)
err = EpollCtl(epollfd, unix.EPOLL_CTL_DEL, fd2, event2)
MustNil(t, err)
err = syscall.Close(fd2) // close fd2
MustNil(t, err)
Equal(t, events[0].data, eventdata2)
// no event after close fd
fd3, err := syscall.Socket(syscall.AF_INET, syscall.SOCK_STREAM, syscall.IPPROTO_TCP)
MustNil(t, err)
t.Logf("create fd: %d", fd3)
err = syscall.SetNonblock(fd3, true)
MustNil(t, err)
err = EpollCtl(epollfd, unix.EPOLL_CTL_ADD, fd3, event1)
MustNil(t, err)
err = syscall.Connect(fd3, &addr)
t.Log(err)
_, err = EpollWait(epollfd, events, -1)
MustNil(t, err)
Assert(t, events[0].events&syscall.EPOLLOUT != 0)
Assert(t, events[0].events&syscall.EPOLLRDHUP == 0)
Assert(t, events[0].events&syscall.EPOLLERR == 0)
MustNil(t, err)
err = EpollCtl(epollfd, unix.EPOLL_CTL_MOD, fd3, eventin)
MustNil(t, err)
err = syscall.Close(fd3) // close fd3
MustNil(t, err)
n, err := EpollWait(epollfd, events, 100)
MustNil(t, err)
Assert(t, n == 0)
}