751 lines
23 KiB
Go
751 lines
23 KiB
Go
//go:build linux
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package authprojection
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import (
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"context"
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"errors"
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"sync"
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"syscall"
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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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func TestBeginContextReturnsWhenRuntimeFlockIsHeld(t *testing.T) {
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spec := testSpec(t)
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first, err := Begin(spec, nil, false)
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if err != nil {
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t.Fatal(err)
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}
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t.Cleanup(func() { _ = first.Close() })
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contended := make(chan error, 1)
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restore := setTestHooksForTest(testHooks{beforeFlock: func(fd int) {
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if err := unix.Flock(fd, unix.LOCK_EX|unix.LOCK_NB); !errors.Is(err, unix.EWOULDBLOCK) {
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contended <- fmt.Errorf("runtime lock contention = %v", err)
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return
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}
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contended <- nil
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}})
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t.Cleanup(restore)
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ctx, cancel := context.WithCancel(context.Background())
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result := make(chan error, 1)
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go func() {
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transaction, err := BeginContext(ctx, spec, nil, false)
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if err == nil {
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err = transaction.Close()
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}
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result <- err
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}()
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if err := <-contended; err != nil {
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t.Fatal(err)
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}
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cancel()
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select {
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case err := <-result:
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if !errors.Is(err, context.Canceled) {
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t.Fatalf("BeginContext() error = %v, want context cancellation", err)
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}
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case <-time.After(2 * time.Second):
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t.Fatal("BeginContext() did not return after cancellation")
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}
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}
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func testSpec(t *testing.T) Spec {
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t.Helper()
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root := t.TempDir()
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if err := os.Chmod(root, runtimeDirectoryMode); err != nil {
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t.Fatal(err)
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}
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return Spec{RuntimeRoot: root, UID: uint32(os.Geteuid()), GID: uint32(os.Getegid())}
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}
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func testSnapshot(t *testing.T, suffix string) Snapshot {
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t.Helper()
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snapshot, err := NewSnapshot("local", []byte("auth-"+suffix), []byte("users-"+suffix))
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if err != nil {
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t.Fatal(err)
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}
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return snapshot
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}
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func commitSnapshot(t *testing.T, spec Spec, snapshot Snapshot) Status {
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t.Helper()
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transaction, err := Begin(spec, nil, false)
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if err != nil {
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t.Fatal(err)
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}
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defer func() { _ = transaction.Close() }()
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status, err := transaction.Commit(snapshot)
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if err != nil {
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t.Fatal(err)
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}
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return status
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}
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func TestBeginCommitPublishesOneVerifiedGeneration(t *testing.T) {
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spec := testSpec(t)
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snapshot := testSnapshot(t, "first")
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status := commitSnapshot(t, spec, snapshot)
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if status.Selector.State != "ready" || status.Selector.Generation != snapshot.Generation {
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t.Fatalf("status = %#v", status.Selector)
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}
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got, err := Inspect(spec)
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if err != nil {
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t.Fatal(err)
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}
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if got.Snapshot.Generation != snapshot.Generation || string(got.Snapshot.Auth) != string(snapshot.Auth) {
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t.Fatalf("snapshot = %#v", got.Snapshot)
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}
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}
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func TestInspectRejectsMissingBlockedMalformedAndTamperedCurrent(t *testing.T) {
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spec := testSpec(t)
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if _, err := Inspect(spec); !errors.Is(err, ErrIntegrity) {
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t.Fatalf("missing error = %v", err)
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}
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transaction, err := Begin(spec, nil, false)
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if err != nil {
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t.Fatal(err)
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}
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if _, err := Inspect(spec); !errors.Is(err, ErrBlocked) {
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t.Fatalf("blocked error = %v", err)
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}
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if err := transaction.Close(); err != nil {
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t.Fatal(err)
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}
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if err := os.WriteFile(filepath.Join(spec.RuntimeRoot, "CURRENT"), []byte("not-json"), runtimeFileMode); err != nil {
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t.Fatal(err)
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}
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if _, err := Inspect(spec); !errors.Is(err, ErrIntegrity) {
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t.Fatalf("malformed error = %v", err)
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}
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spec = testSpec(t)
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commitSnapshot(t, spec, testSnapshot(t, "tampered"))
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if err := os.WriteFile(filepath.Join(spec.RuntimeRoot, "CURRENT"), []byte(`{"version":1,"state":"ready"}`), runtimeFileMode); err != nil {
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t.Fatal(err)
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}
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if _, err := Inspect(spec); !errors.Is(err, ErrIntegrity) {
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t.Fatalf("tampered error = %v", err)
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}
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}
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func TestInspectIsReadOnlyWhenProjectionIsIncomplete(t *testing.T) {
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spec := testSpec(t)
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if _, err := Inspect(spec); !errors.Is(err, ErrIntegrity) {
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t.Fatalf("Inspect error = %v", err)
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}
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entries, err := os.ReadDir(spec.RuntimeRoot)
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if err != nil {
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t.Fatal(err)
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}
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if len(entries) != 0 {
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t.Fatalf("Inspect created runtime entries: %#v", entries)
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}
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}
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func TestDescriptorDirectoryScansDoNotConsumeCallerOffset(t *testing.T) {
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spec := testSpec(t)
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commitSnapshot(t, spec, testSnapshot(t, "scan-offset"))
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root, err := openRoot(spec)
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if err != nil {
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t.Fatal(err)
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}
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defer unix.Close(root)
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first, err := scanDirectoryNames(root, spec)
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if err != nil {
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t.Fatal(err)
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}
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second, err := scanDirectoryNames(root, spec)
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if err != nil {
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t.Fatal(err)
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}
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if len(first) != 2 || len(second) != 2 || !second["CURRENT"] || !second["generations"] {
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t.Fatalf("directory scans = %#v then %#v", first, second)
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}
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}
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func TestInspectRejectsWrongModeOwnerHardlinkSymlinkAndUnexpectedEntry(t *testing.T) {
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cases := []struct {
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name string
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mutate func(t *testing.T, spec Spec, status Status)
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}{
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{
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name: "mode",
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mutate: func(t *testing.T, spec Spec, status Status) {
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t.Helper()
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if err := os.Chmod(filepath.Join(spec.RuntimeRoot, "CURRENT"), 0o644); err != nil {
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t.Fatal(err)
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}
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},
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},
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{
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name: "generation directory mode",
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mutate: func(t *testing.T, spec Spec, status Status) {
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t.Helper()
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if err := os.Chmod(filepath.Join(spec.RuntimeRoot, "generations", status.Snapshot.Generation), 0o755); err != nil {
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t.Fatal(err)
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}
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},
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},
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{
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name: "owner",
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mutate: func(t *testing.T, spec Spec, status Status) {
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t.Helper()
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if os.Geteuid() != 0 {
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t.Skip("requires root to change owner")
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}
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if err := os.Chown(filepath.Join(spec.RuntimeRoot, "CURRENT"), 10002, 10002); err != nil {
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t.Fatal(err)
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}
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},
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},
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{
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name: "hardlink",
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mutate: func(t *testing.T, spec Spec, status Status) {
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t.Helper()
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source := filepath.Join(spec.RuntimeRoot, "generations", status.Snapshot.Generation, "auth.yaml")
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if err := os.Link(source, filepath.Join(spec.RuntimeRoot, "linked")); err != nil {
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t.Fatal(err)
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}
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},
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},
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{
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name: "symlink",
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mutate: func(t *testing.T, spec Spec, status Status) {
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t.Helper()
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if err := os.Symlink("CURRENT", filepath.Join(spec.RuntimeRoot, "link")); err != nil {
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t.Fatal(err)
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}
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},
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},
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{
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name: "unexpected",
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mutate: func(t *testing.T, spec Spec, status Status) {
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t.Helper()
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if err := os.WriteFile(filepath.Join(spec.RuntimeRoot, "unexpected"), []byte("x"), runtimeFileMode); err != nil {
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t.Fatal(err)
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}
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},
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},
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}
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for _, tc := range cases {
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t.Run(tc.name, func(t *testing.T) {
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spec := testSpec(t)
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status := commitSnapshot(t, spec, testSnapshot(t, tc.name))
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tc.mutate(t, spec, status)
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if _, err := Inspect(spec); !errors.Is(err, ErrIntegrity) {
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t.Fatalf("Inspect error = %v", err)
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}
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})
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}
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}
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func TestInspectRejectsUnexpectedGenerationEntry(t *testing.T) {
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spec := testSpec(t)
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status := commitSnapshot(t, spec, testSnapshot(t, "generation-entry"))
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path := filepath.Join(spec.RuntimeRoot, "generations", status.Snapshot.Generation, "unexpected")
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if err := os.WriteFile(path, []byte("x"), runtimeFileMode); err != nil {
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t.Fatal(err)
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}
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if _, err := Inspect(spec); !errors.Is(err, ErrIntegrity) {
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t.Fatalf("Inspect error = %v", err)
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}
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}
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func TestInspectRejectsReadyNamespaceOutsideCurrentHistory(t *testing.T) {
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for _, tc := range []struct {
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name string
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mutate func(t *testing.T, spec Spec, status Status)
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}{
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{"extra generation", func(t *testing.T, spec Spec, _ Status) {
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name := strings.Repeat("e", 64)
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if err := os.Mkdir(filepath.Join(spec.RuntimeRoot, "generations", name), runtimeDirectoryMode); err != nil {
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t.Fatal(err)
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}
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}},
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{"stage", func(t *testing.T, spec Spec, _ Status) {
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name := ".stage-" + strings.Repeat("a", 32) + "-" + strings.Repeat("e", 64)
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if err := os.Mkdir(filepath.Join(spec.RuntimeRoot, "generations", name), runtimeDirectoryMode); err != nil {
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t.Fatal(err)
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}
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}},
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{"corrupt predecessor", func(t *testing.T, spec Spec, status Status) {
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if len(status.Selector.PreviousGenerations) != 1 {
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t.Fatalf("history = %#v", status.Selector.PreviousGenerations)
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}
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path := filepath.Join(spec.RuntimeRoot, "generations", status.Selector.PreviousGenerations[0], "auth.yaml")
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if err := os.WriteFile(path, []byte("tampered"), runtimeFileMode); err != nil {
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t.Fatal(err)
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}
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}},
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{"missing predecessor", func(t *testing.T, spec Spec, status Status) {
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if len(status.Selector.PreviousGenerations) != 1 {
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t.Fatalf("history = %#v", status.Selector.PreviousGenerations)
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}
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if err := os.RemoveAll(filepath.Join(spec.RuntimeRoot, "generations", status.Selector.PreviousGenerations[0])); err != nil {
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t.Fatal(err)
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}
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}},
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} {
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t.Run(tc.name, func(t *testing.T) {
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spec := testSpec(t)
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commitSnapshot(t, spec, testSnapshot(t, "prior-"+tc.name))
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status := commitSnapshot(t, spec, testSnapshot(t, "current-"+tc.name))
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tc.mutate(t, spec, status)
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if _, err := Inspect(spec); !errors.Is(err, ErrIntegrity) {
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t.Fatalf("Inspect error = %v", err)
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}
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})
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}
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}
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func TestBeginRecoversStrictCurrentTemporaryBesideReadySelector(t *testing.T) {
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spec := testSpec(t)
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prior := testSnapshot(t, "ready-temporary")
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commitSnapshot(t, spec, prior)
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temporaryID := strings.Repeat("a", 32)
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temporary, err := encodeSelector(Selector{Version: SchemaVersion, State: "blocked", Transaction: temporaryID})
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if err != nil {
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t.Fatal(err)
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}
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path := filepath.Join(spec.RuntimeRoot, ".current-"+temporaryID+".tmp")
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if err := os.WriteFile(path, temporary, runtimeFileMode); err != nil {
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t.Fatal(err)
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}
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transaction, err := Begin(spec, &prior, true)
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if err != nil {
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t.Fatal(err)
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}
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defer transaction.Close()
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if transaction.prior == nil || transaction.prior.Snapshot.Generation != prior.Generation {
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t.Fatalf("prior = %#v", transaction.prior)
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}
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if _, err := os.Lstat(path); !errors.Is(err, os.ErrNotExist) {
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t.Fatalf("ready temporary remains: %v", err)
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}
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}
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func TestBeginRejectsMalformedCurrentWithoutCreatingGenerations(t *testing.T) {
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spec := testSpec(t)
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if err := os.WriteFile(filepath.Join(spec.RuntimeRoot, "CURRENT"), []byte("malformed"), runtimeFileMode); err != nil {
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t.Fatal(err)
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}
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if _, err := Begin(spec, nil, false); !errors.Is(err, ErrIntegrity) {
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t.Fatalf("Begin error = %v", err)
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}
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if _, err := os.Lstat(filepath.Join(spec.RuntimeRoot, "generations")); !errors.Is(err, os.ErrNotExist) {
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t.Fatalf("Begin mutated malformed root: %v", err)
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}
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}
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func TestCommitRefusesCorruptTargetUnlessCurrentIsMatchingBlockedTransaction(t *testing.T) {
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for _, tc := range []struct {
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name string
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current func(t *testing.T, root string, transaction string, snapshot Snapshot)
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}{
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{"ready", func(t *testing.T, root, _ string, snapshot Snapshot) {
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data, err := encodeSelector(Selector{Version: SchemaVersion, State: "ready", Transaction: strings.Repeat("b", 32), Generation: snapshot.Generation})
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if err != nil {
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t.Fatal(err)
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}
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if err := os.WriteFile(filepath.Join(root, "CURRENT"), data, runtimeFileMode); err != nil {
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t.Fatal(err)
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}
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}},
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{"malformed", func(t *testing.T, root, _ string, _ Snapshot) {
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if err := os.WriteFile(filepath.Join(root, "CURRENT"), []byte("malformed"), runtimeFileMode); err != nil {
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t.Fatal(err)
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}
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}},
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{"other blocked transaction", func(t *testing.T, root, transaction string, _ Snapshot) {
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other := strings.Repeat("b", 32)
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if other == transaction {
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other = strings.Repeat("c", 32)
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}
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data, err := encodeSelector(Selector{Version: SchemaVersion, State: "blocked", Transaction: other})
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if err != nil {
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t.Fatal(err)
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}
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if err := os.WriteFile(filepath.Join(root, "CURRENT"), data, runtimeFileMode); err != nil {
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t.Fatal(err)
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}
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}},
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} {
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t.Run(tc.name, func(t *testing.T) {
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spec := testSpec(t)
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snapshot := testSnapshot(t, "corrupt-"+tc.name)
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transaction, err := Begin(spec, nil, false)
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if err != nil {
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t.Fatal(err)
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}
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defer transaction.Close()
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target := filepath.Join(spec.RuntimeRoot, "generations", snapshot.Generation)
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if err := os.Mkdir(target, runtimeDirectoryMode); err != nil {
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t.Fatal(err)
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}
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for _, name := range []string{"auth.yaml", "users.yaml", "manifest.json"} {
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if err := os.WriteFile(filepath.Join(target, name), []byte("corrupt"), runtimeFileMode); err != nil {
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t.Fatal(err)
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}
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}
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tc.current(t, spec.RuntimeRoot, transaction.transactionID, snapshot)
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if _, err := transaction.Commit(snapshot); !errors.Is(err, ErrIntegrity) {
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t.Fatalf("Commit error = %v", err)
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}
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if _, err := os.Lstat(target); err != nil {
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t.Fatalf("corrupt target was removed: %v", err)
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}
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})
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}
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}
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func TestCommitLeavesBlockedAfterInjectedStageWriteFsyncRenameAndVerifyFailure(t *testing.T) {
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for _, tc := range []struct {
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name string
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hooks testHooks
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}{
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{"stage write", testHooks{beforeStageWrite: func() error { return errors.New("sentinel") }}},
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{"stage fsync", testHooks{beforeStageFsync: func() error { return errors.New("sentinel") }}},
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{"stage rename", testHooks{beforeStageRename: func() error { return errors.New("sentinel") }}},
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{"current", testHooks{beforeCurrentRename: func() error { return errors.New("sentinel") }}},
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{"verify", testHooks{beforeFinalVerify: func() error { return errors.New("sentinel") }}},
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} {
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t.Run(tc.name, func(t *testing.T) {
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spec := testSpec(t)
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transaction, err := Begin(spec, nil, false)
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if err != nil {
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t.Fatal(err)
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}
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defer transaction.Close()
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restore := setTestHooksForTest(tc.hooks)
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defer restore()
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if _, err := transaction.Commit(testSnapshot(t, tc.name)); !errors.Is(err, ErrIntegrity) || strings.Contains(fmt.Sprint(err), "sentinel") {
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t.Fatalf("Commit error = %v", err)
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}
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if _, err := Inspect(spec); !errors.Is(err, ErrBlocked) {
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t.Fatalf("Inspect error = %v", err)
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}
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})
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}
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}
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func TestRestoreIfUnchangedRestoresPriorReadyOnlyForEqualCanonicalSnapshot(t *testing.T) {
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spec := testSpec(t)
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prior := testSnapshot(t, "prior")
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commitSnapshot(t, spec, prior)
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transaction, err := Begin(spec, &prior, true)
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if err != nil {
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t.Fatal(err)
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}
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defer transaction.Close()
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if err := transaction.RestoreIfUnchanged(prior); err != nil {
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t.Fatal(err)
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}
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if got, err := Inspect(spec); err != nil || got.Snapshot.Generation != prior.Generation {
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t.Fatalf("restored = %#v, %v", got, err)
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}
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if err := transaction.Close(); err != nil {
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t.Fatal(err)
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}
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transaction, err = Begin(spec, &prior, true)
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if err != nil {
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t.Fatal(err)
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}
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defer transaction.Close()
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if err := transaction.RestoreIfUnchanged(testSnapshot(t, "changed")); !errors.Is(err, ErrIntegrity) {
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t.Fatalf("changed restore error = %v", err)
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}
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if _, err := Inspect(spec); !errors.Is(err, ErrBlocked) {
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t.Fatalf("Inspect error = %v", err)
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}
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}
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func TestRecoveryRemovesOnlyRecordedSafeStageAndStrictCurrentTemporary(t *testing.T) {
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spec := testSpec(t)
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first, err := Begin(spec, nil, false)
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if err != nil {
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t.Fatal(err)
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}
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transactionID := first.transactionID
|
|
if err := first.Close(); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
stage := filepath.Join(spec.RuntimeRoot, "generations", ".stage-"+transactionID+"-"+testSnapshot(t, "stage").Generation)
|
|
if err := os.MkdirAll(stage, runtimeDirectoryMode); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
currentTmp := filepath.Join(spec.RuntimeRoot, ".current-"+transactionID+".tmp")
|
|
currentData, err := encodeSelector(Selector{Version: SchemaVersion, State: "blocked", Transaction: transactionID})
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := os.WriteFile(currentTmp, currentData, runtimeFileMode); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
second, err := Begin(spec, nil, false)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := second.Close(); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if _, err := os.Lstat(stage); !errors.Is(err, os.ErrNotExist) {
|
|
t.Fatalf("stage remains: %v", err)
|
|
}
|
|
if _, err := os.Lstat(currentTmp); !errors.Is(err, os.ErrNotExist) {
|
|
t.Fatalf("temporary remains: %v", err)
|
|
}
|
|
}
|
|
|
|
func TestRecoveryRefusesUnrelatedOrUnsafeTemporaryEntries(t *testing.T) {
|
|
spec := testSpec(t)
|
|
transaction, err := Begin(spec, nil, false)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := transaction.Close(); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
other := strings.Repeat("a", 32)
|
|
if other == transaction.transactionID {
|
|
other = strings.Repeat("b", 32)
|
|
}
|
|
stage := filepath.Join(spec.RuntimeRoot, "generations", ".stage-"+other+"-"+testSnapshot(t, "unrelated").Generation)
|
|
if err := os.Mkdir(stage, runtimeDirectoryMode); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if _, err := Begin(spec, nil, false); !errors.Is(err, ErrIntegrity) {
|
|
t.Fatalf("Begin error = %v", err)
|
|
}
|
|
if _, err := os.Lstat(stage); err != nil {
|
|
t.Fatalf("unrelated stage removed: %v", err)
|
|
}
|
|
}
|
|
|
|
func TestRecoveryRefusesUnsafeCurrentTemporaryEntries(t *testing.T) {
|
|
for _, tc := range []struct {
|
|
name string
|
|
make func(t *testing.T, root, name string)
|
|
}{
|
|
{"symlink", func(t *testing.T, root, name string) {
|
|
if err := os.Symlink("CURRENT", filepath.Join(root, name)); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}},
|
|
{"hardlink", func(t *testing.T, root, name string) {
|
|
if err := os.Link(filepath.Join(root, "CURRENT"), filepath.Join(root, name)); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}},
|
|
{"oversized", func(t *testing.T, root, name string) {
|
|
if err := os.WriteFile(filepath.Join(root, name), []byte(strings.Repeat("x", maximumSelectorBytes+1)), runtimeFileMode); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}},
|
|
} {
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
spec := testSpec(t)
|
|
transaction, err := Begin(spec, nil, false)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
transactionID := transaction.transactionID
|
|
if err := transaction.Close(); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
name := ".current-" + transactionID + ".tmp"
|
|
tc.make(t, spec.RuntimeRoot, name)
|
|
if _, err := Begin(spec, nil, false); !errors.Is(err, ErrIntegrity) {
|
|
t.Fatalf("Begin error = %v", err)
|
|
}
|
|
if _, err := os.Lstat(filepath.Join(spec.RuntimeRoot, name)); err != nil {
|
|
t.Fatalf("unsafe temporary was removed: %v", err)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestRetentionKeepsCurrentAndTwoPredecessors(t *testing.T) {
|
|
spec := testSpec(t)
|
|
var snapshots []Snapshot
|
|
for index := 0; index < 4; index++ {
|
|
snapshot := testSnapshot(t, fmt.Sprint(index))
|
|
commitSnapshot(t, spec, snapshot)
|
|
snapshots = append(snapshots, snapshot)
|
|
}
|
|
status, err := Inspect(spec)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if len(status.Selector.PreviousGenerations) != retainedPredecessors {
|
|
t.Fatalf("history = %#v", status.Selector.PreviousGenerations)
|
|
}
|
|
for _, snapshot := range snapshots[1:] {
|
|
if _, err := os.Stat(filepath.Join(spec.RuntimeRoot, "generations", snapshot.Generation)); err != nil {
|
|
t.Fatalf("retained generation %s: %v", snapshot.Generation, err)
|
|
}
|
|
}
|
|
if _, err := os.Stat(filepath.Join(spec.RuntimeRoot, "generations", snapshots[0].Generation)); !errors.Is(err, os.ErrNotExist) {
|
|
t.Fatalf("old generation still present: %v", err)
|
|
}
|
|
}
|
|
|
|
func TestBeginCompletesSafeRetentionAfterReadyPublicationInterruptedBeforeCleanup(t *testing.T) {
|
|
spec := testSpec(t)
|
|
var snapshots []Snapshot
|
|
for index := 0; index < 3; index++ {
|
|
snapshot := testSnapshot(t, fmt.Sprintf("interrupted-%d", index))
|
|
commitSnapshot(t, spec, snapshot)
|
|
snapshots = append(snapshots, snapshot)
|
|
}
|
|
fourth := testSnapshot(t, "interrupted-3")
|
|
transaction, err := Begin(spec, nil, false)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
restore := setTestHooksForTest(testHooks{beforeRetention: func() error { return errors.New("sentinel") }})
|
|
if _, err := transaction.Commit(fourth); !errors.Is(err, ErrIntegrity) || strings.Contains(fmt.Sprint(err), "sentinel") {
|
|
t.Fatalf("interrupted Commit error = %v", err)
|
|
}
|
|
restore()
|
|
if err := transaction.Close(); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if _, err := Inspect(spec); !errors.Is(err, ErrIntegrity) {
|
|
t.Fatalf("Inspect after interrupted retention error = %v", err)
|
|
}
|
|
|
|
fifth := testSnapshot(t, "interrupted-4")
|
|
recovery, err := Begin(spec, &fourth, true)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer recovery.Close()
|
|
status, err := recovery.Commit(fifth)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if status.Snapshot.Generation != fifth.Generation {
|
|
t.Fatalf("generation = %s", status.Snapshot.Generation)
|
|
}
|
|
if _, err := Inspect(spec); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if _, err := os.Lstat(filepath.Join(spec.RuntimeRoot, "generations", snapshots[0].Generation)); !errors.Is(err, os.ErrNotExist) {
|
|
t.Fatalf("surplus generation remains: %v", err)
|
|
}
|
|
}
|
|
|
|
func TestConcurrentTransactionsNeverPublishMixedGeneration(t *testing.T) {
|
|
spec := testSpec(t)
|
|
first := testSnapshot(t, "one")
|
|
second := testSnapshot(t, "two")
|
|
var group sync.WaitGroup
|
|
errorsByWorker := make(chan error, 2)
|
|
for _, snapshot := range []Snapshot{first, second} {
|
|
group.Add(1)
|
|
go func(snapshot Snapshot) {
|
|
defer group.Done()
|
|
transaction, err := Begin(spec, nil, false)
|
|
if err == nil {
|
|
_, err = transaction.Commit(snapshot)
|
|
closeErr := transaction.Close()
|
|
if err == nil {
|
|
err = closeErr
|
|
}
|
|
}
|
|
errorsByWorker <- err
|
|
}(snapshot)
|
|
}
|
|
group.Wait()
|
|
close(errorsByWorker)
|
|
for err := range errorsByWorker {
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
got, err := Inspect(spec)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if got.Snapshot.Generation != first.Generation && got.Snapshot.Generation != second.Generation {
|
|
t.Fatalf("mixed generation = %s", got.Snapshot.Generation)
|
|
}
|
|
}
|
|
|
|
func TestBeginCommitUsesNumericUIDGID10001WhenRoot(t *testing.T) {
|
|
if os.Geteuid() != 0 {
|
|
t.Skip("requires root")
|
|
}
|
|
spec := testSpec(t)
|
|
spec.UID, spec.GID = 10001, 10001
|
|
if err := os.Chown(spec.RuntimeRoot, int(spec.UID), int(spec.GID)); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
status := commitSnapshot(t, spec, testSnapshot(t, "numeric"))
|
|
for _, path := range []string{spec.RuntimeRoot, filepath.Join(spec.RuntimeRoot, "generations"), filepath.Join(spec.RuntimeRoot, "generations", status.Snapshot.Generation), filepath.Join(spec.RuntimeRoot, "CURRENT"), filepath.Join(spec.RuntimeRoot, "generations", status.Snapshot.Generation, "auth.yaml"), filepath.Join(spec.RuntimeRoot, "generations", status.Snapshot.Generation, "users.yaml"), filepath.Join(spec.RuntimeRoot, "generations", status.Snapshot.Generation, "manifest.json")} {
|
|
info, err := os.Lstat(path)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
stat := info.Sys().(*syscall.Stat_t)
|
|
if stat.Uid != 10001 || stat.Gid != 10001 {
|
|
t.Fatalf("%s ownership = %d:%d", path, stat.Uid, stat.Gid)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestConcurrentBeginSerializesAcrossCurrentRenameWithoutCreatingLockEntry(t *testing.T) {
|
|
spec := testSpec(t)
|
|
first, err := Begin(spec, nil, false)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
checked := make(chan error, 1)
|
|
restore := setTestHooksForTest(testHooks{beforeFlock: func(fd int) {
|
|
if err := unix.Flock(fd, unix.LOCK_EX|unix.LOCK_NB); !errors.Is(err, unix.EWOULDBLOCK) {
|
|
checked <- fmt.Errorf("nonblocking flock error = %v", err)
|
|
return
|
|
}
|
|
checked <- nil
|
|
}})
|
|
defer restore()
|
|
finished := make(chan error, 1)
|
|
go func() {
|
|
second, err := Begin(spec, nil, false)
|
|
if err == nil {
|
|
err = second.Close()
|
|
}
|
|
finished <- err
|
|
}()
|
|
if err := <-checked; err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
select {
|
|
case err := <-finished:
|
|
t.Fatalf("second Begin did not block: %v", err)
|
|
default:
|
|
}
|
|
if err := first.Close(); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := <-finished; err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
entries, err := os.ReadDir(spec.RuntimeRoot)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
for _, entry := range entries {
|
|
if strings.Contains(entry.Name(), "lock") {
|
|
t.Fatalf("unexpected lock entry %q", entry.Name())
|
|
}
|
|
}
|
|
}
|