64 lines
1.7 KiB
Go
64 lines
1.7 KiB
Go
// Copyright 2020 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 gofer
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import (
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"sync/atomic"
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"testing"
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"gvisor.dev/gvisor/pkg/p9"
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"gvisor.dev/gvisor/pkg/sentry/contexttest"
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)
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func TestDestroyIdempotent(t *testing.T) {
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fs := filesystem{
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syncableDentries: make(map[*dentry]struct{}),
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opts: filesystemOptions{
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// Test relies on no dentry being held in the cache.
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maxCachedDentries: 0,
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},
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}
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ctx := contexttest.Context(t)
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attr := &p9.Attr{
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Mode: p9.ModeRegular,
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}
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mask := p9.AttrMask{
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Mode: true,
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Size: true,
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}
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parent, err := fs.newDentry(ctx, p9file{}, p9.QID{}, mask, attr)
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if err != nil {
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t.Fatalf("fs.newDentry(): %v", err)
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}
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child, err := fs.newDentry(ctx, p9file{}, p9.QID{}, mask, attr)
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if err != nil {
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t.Fatalf("fs.newDentry(): %v", err)
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}
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parent.cacheNewChildLocked(child, "child")
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child.checkCachingLocked()
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if got := atomic.LoadInt64(&child.refs); got != -1 {
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t.Fatalf("child.refs=%d, want: -1", got)
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}
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// Parent will also be destroyed when child reference is removed.
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if got := atomic.LoadInt64(&parent.refs); got != -1 {
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t.Fatalf("parent.refs=%d, want: -1", got)
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}
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child.checkCachingLocked()
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child.checkCachingLocked()
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}
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