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|
//go:build linux
package bridge
import (
"context"
"os"
"path/filepath"
"testing"
"github.com/docker/docker/internal/testutils/netnsutils"
"github.com/vishvananda/netlink"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
)
func TestMirroredWSL2Workaround(t *testing.T) {
for _, tc := range []struct {
desc string
loopback0 bool
wslinfoPerm os.FileMode // 0 for no-file
expMirrored bool
}{
{
desc: "No loopback0",
},
{
desc: "WSL2 mirrored",
loopback0: true,
wslinfoPerm: 0o777,
expMirrored: true,
},
{
desc: "loopback0 but wslinfo not executable",
loopback0: true,
wslinfoPerm: 0o666,
},
{
desc: "loopback0 but no wslinfo",
loopback0: true,
},
} {
t.Run(tc.desc, func(t *testing.T) {
defer netnsutils.SetupTestOSContext(t)()
simulateWSL2MirroredMode(t, tc.loopback0, tc.wslinfoPerm)
assert.Check(t, is.Equal(isRunningUnderWSL2MirroredMode(context.Background()), tc.expMirrored))
})
}
}
// simulateWSL2MirroredMode simulates the WSL2 mirrored mode by creating a
// loopback0 interface and optionally creating a wslinfo file with the given
// permissions.
func simulateWSL2MirroredMode(t *testing.T, loopback0 bool, wslinfoPerm os.FileMode) {
if loopback0 {
iface := &netlink.Dummy{
LinkAttrs: netlink.LinkAttrs{
Name: "loopback0",
},
}
err := netlink.LinkAdd(iface)
assert.NilError(t, err)
}
wslinfoPathOrig := wslinfoPath
if wslinfoPerm != 0 {
tmpdir := t.TempDir()
p := filepath.Join(tmpdir, "wslinfo")
err := os.WriteFile(p, []byte("#!/bin/sh\necho dummy file\n"), wslinfoPerm)
assert.NilError(t, err)
wslinfoPath = p
}
t.Cleanup(func() {
wslinfoPath = wslinfoPathOrig
})
}
|
