122 lines
3.3 KiB
Go
122 lines
3.3 KiB
Go
//go:build linux
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package fswatch
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import (
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"errors"
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"os"
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"path/filepath"
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"testing"
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"time"
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"golang.org/x/sys/unix"
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)
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// fanotifyNoRenameWatcher exposes a fanotify backend that skips the
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// FAN_RENAME probe and forces the FAN_MOVED_FROM/FAN_MOVED_TO fallback
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// path. It runs under runForEachWatcher (via additionalTestWatchers)
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// so the broad test matrix exercises both kernel paths on systems where
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// FAN_RENAME would otherwise be selected automatically.
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var fanotifyNoRenameWatcher = &watcher{name: "fanotify-no-rename"}
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func init() {
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if fanotifyAvailable() {
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fanotifyNoRenameWatcher.factory = func() watcherImpl { return newFanotifyBackend(true) }
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additionalTestWatchers = append(additionalTestWatchers, fanotifyNoRenameWatcher)
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}
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}
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func TestLinuxFanotifyShutdownBeforeStart(t *testing.T) {
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t.Parallel()
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newFanotifyBackend(false).shutdown()
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}
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func TestLinuxFanotifyBackendSelection(t *testing.T) {
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t.Parallel()
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if !fanotifyAvailable() {
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t.Skip("fanotify not available")
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}
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impl, err := fanotifyWatcher.getImpl()
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if err != nil {
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t.Fatal(err)
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}
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if _, ok := impl.(*fanotifyBackend); !ok {
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t.Fatalf("fanotify watcher = %T, want *fanotifyBackend", impl)
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}
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}
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func TestLinuxFanotifySubscribeCleansUpAfterMarkFailure(t *testing.T) {
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t.Parallel()
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dir := newTmpDir(t)
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w := newDirectWatcher(t, dir)
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b := newFanotifyBackend(false)
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err := b.subscribe(w)
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var werr *dirWatchError
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if !errors.As(err, &werr) {
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t.Fatalf("subscribe error = %v, want *dirWatchError", err)
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}
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if werr.dirWatch != w {
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t.Fatalf("dirWatchError dirWatch = %p, want %p", werr.dirWatch, w)
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}
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if len(b.subscriptions) != 0 {
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t.Fatalf("subscriptions not cleaned up: %d remaining", len(b.subscriptions))
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}
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}
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func TestLinuxFanotifyParseDfidNameRoundTrip(t *testing.T) {
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t.Parallel()
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dir := newTmpDir(t)
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handle, _, err := unix.NameToHandleAt(unix.AT_FDCWD, dir, 0)
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if err != nil {
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t.Skipf("NameToHandleAt not supported: %v", err)
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}
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var st unix.Statfs_t
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if err = unix.Statfs(dir, &st); err != nil {
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t.Fatal(err)
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}
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key := makeFanotifyHandleKey(st.Fsid.Val, handle.Type(), handle.Bytes())
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if key.handle == "" {
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t.Fatal("empty handle bytes")
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}
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handle2, _, err := unix.NameToHandleAt(unix.AT_FDCWD, dir, 0)
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if err != nil {
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t.Fatal(err)
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}
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key2 := makeFanotifyHandleKey(st.Fsid.Val, handle2.Type(), handle2.Bytes())
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if key != key2 {
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t.Fatalf("handle keys differ for same path:\n 1: %+v\n 2: %+v", key, key2)
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}
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}
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func TestFanotifyCrossWatcherSameFs(t *testing.T) {
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t.Parallel()
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if !fanotifyAvailable() {
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t.Skip("fanotify not available")
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}
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t.Run("Modify", func(t *testing.T) {
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t.Parallel()
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dirA, dirB := newTmpDir(t), newTmpDir(t)
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pathA := filepath.Join(dirA, "child")
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pathB := filepath.Join(dirB, "child")
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for _, p := range []string{pathA, pathB} {
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if err := os.WriteFile(p, []byte("initial"), 0o644); err != nil {
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t.Fatal(err)
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}
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}
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rA, _ := subscribeFor(t, dirA, Fanotify())
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rB, _ := subscribeFor(t, dirB, Fanotify())
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if err := os.WriteFile(pathA, []byte("changed"), 0o644); err != nil {
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t.Fatal(err)
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}
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gotA := rA.gather(rA.deadline(), 200*time.Millisecond)
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assertEventSet(t, gotA, []wantEvent{{EventUpdate, pathA}})
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if gotB := rB.drainQuiet(200 * time.Millisecond); len(gotB) != 0 {
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t.Fatalf("watcher B got phantom events: %v", toWantEvents(gotB))
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}
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})
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}
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