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// Copyright 2018 The gVisor 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.
package host
import (
"io/ioutil"
"path/filepath"
"syscall"
"testing"
"gvisor.dev/gvisor/pkg/fdnotifier"
"gvisor.dev/gvisor/pkg/waiter"
)
func TestDescriptorRelease(t *testing.T) {
for _, tc := range []struct {
name string
saveable bool
wouldBlock bool
}{
{name: "all false"},
{name: "saveable", saveable: true},
{name: "wouldBlock", wouldBlock: true},
} {
t.Run(tc.name, func(t *testing.T) {
dir, err := ioutil.TempDir("", "descriptor_test")
if err != nil {
t.Fatal("ioutil.TempDir() failed:", err)
}
fd, err := syscall.Open(filepath.Join(dir, "file"), syscall.O_RDWR|syscall.O_CREAT, 0666)
if err != nil {
t.Fatal("failed to open temp file:", err)
}
// FD ownership is transferred to the descritor.
queue := &waiter.Queue{}
d, err := newDescriptor(fd, tc.saveable, tc.wouldBlock, queue)
if err != nil {
syscall.Close(fd)
t.Fatalf("newDescriptor(%d, %t, %t, queue) failed, err: %v", fd, tc.saveable, tc.wouldBlock, err)
}
if tc.saveable {
if d.origFD < 0 {
t.Errorf("saveable descriptor must preserve origFD, desc: %+v", d)
}
}
if tc.wouldBlock {
if !fdnotifier.HasFD(int32(d.value)) {
t.Errorf("FD not registered with notifier, desc: %+v", d)
}
}
oldVal := d.value
d.Release()
if d.value != -1 {
t.Errorf("d.value want: -1, got: %d", d.value)
}
if tc.wouldBlock {
if fdnotifier.HasFD(int32(oldVal)) {
t.Errorf("FD not unregistered with notifier, desc: %+v", d)
}
}
})
}
}
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