112 lines
2.4 KiB
Go
112 lines
2.4 KiB
Go
// +build linux
|
|
|
|
/*
|
|
Copyright The containerd 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 mount
|
|
|
|
import (
|
|
"io/ioutil"
|
|
"os"
|
|
"testing"
|
|
|
|
"github.com/containerd/continuity/testutil"
|
|
)
|
|
|
|
func TestSetupLoop(t *testing.T) {
|
|
testutil.RequiresRoot(t)
|
|
const randomdata = "randomdata"
|
|
|
|
/* Non-existing loop */
|
|
backingFile := "setup-loop-test-no-such-file"
|
|
_, err := setupLoop(backingFile, LoopParams{})
|
|
if err == nil {
|
|
t.Fatalf("setupLoop with non-existing file should fail")
|
|
}
|
|
|
|
f, err := ioutil.TempFile("", "losetup")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err = f.Truncate(512); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
backingFile = f.Name()
|
|
f.Close()
|
|
defer func() {
|
|
if err := os.Remove(backingFile); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}()
|
|
|
|
/* RO loop */
|
|
path, err := setupLoop(backingFile, LoopParams{Readonly: true, Autoclear: true})
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
ff, err := os.OpenFile(path, os.O_RDWR, 0)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if _, err = ff.Write([]byte(randomdata)); err == nil {
|
|
t.Fatalf("writing to readonly loop device should fail")
|
|
}
|
|
if err = ff.Close(); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
/* RW loop */
|
|
path, err = setupLoop(backingFile, LoopParams{Autoclear: true})
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
ff, err = os.OpenFile(path, os.O_RDWR, 0)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if _, err = ff.Write([]byte(randomdata)); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err = ff.Close(); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func TestAttachDetachLoopDevice(t *testing.T) {
|
|
testutil.RequiresRoot(t)
|
|
f, err := ioutil.TempFile("", "losetup")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err = f.Truncate(512); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
f.Close()
|
|
defer func() {
|
|
if err := os.Remove(f.Name()); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}()
|
|
|
|
dev, err := AttachLoopDevice(f.Name())
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err = DetachLoopDevice(dev); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|