2020-01-21 22:25:14 +00:00
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// Copyright 2019 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package sys_test
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import (
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"fmt"
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"testing"
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"github.com/google/go-cmp/cmp"
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"gvisor.dev/gvisor/pkg/abi/linux"
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"gvisor.dev/gvisor/pkg/sentry/fsimpl/sys"
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"gvisor.dev/gvisor/pkg/sentry/fsimpl/testutil"
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"gvisor.dev/gvisor/pkg/sentry/kernel"
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"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
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"gvisor.dev/gvisor/pkg/sentry/vfs"
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)
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func newTestSystem(t *testing.T) *testutil.System {
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k, err := testutil.Boot()
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if err != nil {
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t.Fatalf("Failed to create test kernel: %v", err)
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}
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ctx := k.SupervisorContext()
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creds := auth.CredentialsFromContext(ctx)
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2020-02-14 21:39:51 +00:00
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k.VFS().MustRegisterFilesystemType(sys.Name, sys.FilesystemType{}, &vfs.RegisterFilesystemTypeOptions{
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2020-01-21 22:25:14 +00:00
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AllowUserMount: true,
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})
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2020-02-14 21:39:51 +00:00
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mns, err := k.VFS().NewMountNamespace(ctx, creds, "", sys.Name, &vfs.GetFilesystemOptions{})
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2020-01-21 22:25:14 +00:00
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if err != nil {
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t.Fatalf("Failed to create new mount namespace: %v", err)
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}
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2020-02-14 21:39:51 +00:00
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return testutil.NewSystem(ctx, t, k.VFS(), mns)
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2020-01-21 22:25:14 +00:00
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}
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func TestReadCPUFile(t *testing.T) {
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s := newTestSystem(t)
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defer s.Destroy()
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k := kernel.KernelFromContext(s.Ctx)
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maxCPUCores := k.ApplicationCores()
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expected := fmt.Sprintf("0-%d", maxCPUCores-1)
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for _, fname := range []string{"online", "possible", "present"} {
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pop := s.PathOpAtRoot(fmt.Sprintf("devices/system/cpu/%s", fname))
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2020-01-22 23:14:43 +00:00
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fd, err := s.VFS.OpenAt(s.Ctx, s.Creds, pop, &vfs.OpenOptions{})
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2020-01-21 22:25:14 +00:00
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if err != nil {
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t.Fatalf("OpenAt(pop:%+v) = %+v failed: %v", pop, fd, err)
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}
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defer fd.DecRef()
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content, err := s.ReadToEnd(fd)
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if err != nil {
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t.Fatalf("Read failed: %v", err)
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}
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if diff := cmp.Diff(expected, content); diff != "" {
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t.Fatalf("Read returned unexpected data:\n--- want\n+++ got\n%v", diff)
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}
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}
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}
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func TestSysRootContainsExpectedEntries(t *testing.T) {
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s := newTestSystem(t)
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defer s.Destroy()
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pop := s.PathOpAtRoot("/")
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2020-01-22 23:14:43 +00:00
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s.AssertAllDirentTypes(s.ListDirents(pop), map[string]testutil.DirentType{
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2020-01-21 22:25:14 +00:00
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"block": linux.DT_DIR,
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"bus": linux.DT_DIR,
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"class": linux.DT_DIR,
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"dev": linux.DT_DIR,
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"devices": linux.DT_DIR,
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"firmware": linux.DT_DIR,
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"fs": linux.DT_DIR,
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"kernel": linux.DT_DIR,
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"module": linux.DT_DIR,
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"power": linux.DT_DIR,
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})
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}
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