| 1 | //go:build linux && rootrunner |
| 2 | |
| 3 | package host |
| 4 | |
| 5 | import ( |
| 6 | "errors" |
| 7 | "os" |
| 8 | "path/filepath" |
| 9 | "testing" |
| 10 | |
| 11 | "github.com/carlosframework/platform/internal/rootstate" |
| 12 | "golang.org/x/sys/unix" |
| 13 | ) |
| 14 | |
| 15 | // Production filesystem and private state, with fixture retirement authority. |
| 16 | // This does not exercise an installed root service or authenticated retirement. |
| 17 | func TestRootServingParkDisplacedRoot(t *testing.T) { |
| 18 | servingRootRunner(t) |
| 19 | for _, fault := range []string{"", "old-record", "lost-rmdir-reply", "submount", "unknown-root-with-event"} { |
| 20 | t.Run(fault, func(t *testing.T) { |
| 21 | root, err := os.MkdirTemp("/var/lib", "carlos-rootrunner-displaced-") |
| 22 | if err != nil { |
| 23 | t.Fatal(err) |
| 24 | } |
| 25 | t.Cleanup(func() { |
| 26 | if err := os.RemoveAll(root); err != nil { |
| 27 | t.Error(err) |
| 28 | } |
| 29 | }) |
| 30 | data := filepath.Join(root, "data") |
| 31 | servingRunnerMount(t, data) |
| 32 | state, err := rootstate.Open(filepath.Join(root, "authority"), true, false) |
| 33 | if err != nil { |
| 34 | t.Fatal(err) |
| 35 | } |
| 36 | t.Cleanup(func() { |
| 37 | if err := state.Close(); err != nil { |
| 38 | t.Error(err) |
| 39 | } |
| 40 | }) |
| 41 | r := servingRunnerPark(t, data, state) |
| 42 | r.Complete = true // completion is a fixture, not claim-writer evidence |
| 43 | if fault == "old-record" { |
| 44 | r.Namespace = servingArtifactDirectory{} |
| 45 | } |
| 46 | fs := newServingParkFS(data, state) |
| 47 | ledger := &servingParkLedger{state: state} |
| 48 | save := func() error { return ledger.write("fixture.json", r) } |
| 49 | if err := save(); err != nil { |
| 50 | t.Fatal(err) |
| 51 | } |
| 52 | path := filepath.Join(data, "instances", ".serving-parked") |
| 53 | saved := path + "-saved" |
| 54 | if err := os.Rename(path, saved); err != nil { |
| 55 | t.Fatal(err) |
| 56 | } |
| 57 | if err := os.Mkdir(path, 0700); err != nil { |
| 58 | t.Fatal(err) |
| 59 | } |
| 60 | if err := os.WriteFile(filepath.Join(path, "unknown"), []byte("retained unknown bytes"), 0600); err != nil { |
| 61 | t.Fatal(err) |
| 62 | } |
| 63 | q, err := fs.recoverNamespace(t.Context(), r.Source.Parent) |
| 64 | if err != nil || q.Previous == nil { |
| 65 | t.Fatal("quarantine", err) |
| 66 | } |
| 67 | if fault == "submount" { |
| 68 | if err := unix.Mount(saved, saved, "", unix.MS_BIND, ""); err != nil { |
| 69 | t.Fatal(err) |
| 70 | } |
| 71 | t.Cleanup(func() { |
| 72 | if err := unix.Unmount(saved, 0); err != nil { |
| 73 | t.Error(err) |
| 74 | } |
| 75 | }) |
| 76 | } |
| 77 | if fault == "unknown-root-with-event" { |
| 78 | // Move the genuine event into an unrecorded root while keeping its |
| 79 | // inode. Event identity alone must not grant parent authority. |
| 80 | outside := filepath.Join(data, "instances", "container") |
| 81 | if err := os.Mkdir(outside, 0700); err != nil { |
| 82 | t.Fatal(err) |
| 83 | } |
| 84 | if err := os.Rename(saved, filepath.Join(outside, "known")); err != nil { |
| 85 | t.Fatal(err) |
| 86 | } |
| 87 | if err := os.Mkdir(saved, 0700); err != nil { |
| 88 | t.Fatal(err) |
| 89 | } |
| 90 | if err := os.Rename(filepath.Join(outside, "known", r.Authorization.ID), filepath.Join(saved, r.Authorization.ID)); err != nil { |
| 91 | t.Fatal(err) |
| 92 | } |
| 93 | } |
| 94 | if fault == "submount" || fault == "unknown-root-with-event" { |
| 95 | writes := 0 |
| 96 | r.Deleting, r.Cause = true, "expiry" |
| 97 | if err := fs.Delete(&r, func() error { writes++; return nil }); err == nil || writes != 0 { |
| 98 | t.Fatal("unproven root accepted", writes, err) |
| 99 | } |
| 100 | for suffix, want := range map[string]string{"": "database", "-wal": "WAL", "-shm": "SHM"} { |
| 101 | body, err := os.ReadFile(filepath.Join(saved, r.Authorization.ID, r.Authorization.Successor.Host+".db"+suffix)) |
| 102 | if err != nil || string(body) != want { |
| 103 | t.Fatal("refusal lost bytes", err) |
| 104 | } |
| 105 | } |
| 106 | } else { |
| 107 | if err := fs.CheckParked(&r); err != nil { |
| 108 | t.Fatal("displaced root", err) |
| 109 | } |
| 110 | r.Deleting, r.Cause = true, "expiry" |
| 111 | if err := save(); err != nil { |
| 112 | t.Fatal(err) |
| 113 | } |
| 114 | if fault == "lost-rmdir-reply" { |
| 115 | fs.unlink = func(fd int, name string, flags int) error { |
| 116 | if err := unix.Unlinkat(fd, name, flags); err != nil { |
| 117 | return err |
| 118 | } |
| 119 | if flags == unix.AT_REMOVEDIR { |
| 120 | return unix.EIO |
| 121 | } |
| 122 | return nil |
| 123 | } |
| 124 | if err := fs.Delete(&r, save); !errors.Is(err, unix.EIO) { |
| 125 | t.Fatal("missing lost reply", err) |
| 126 | } |
| 127 | body, err := state.Read("fixture.json") |
| 128 | if err != nil || servingParkDecode(body, &r) != nil { |
| 129 | t.Fatal("retained progress", err) |
| 130 | } |
| 131 | fs = newServingParkFS(data, state) |
| 132 | } |
| 133 | if err := fs.Delete(&r, save); err != nil { |
| 134 | t.Fatal("delete recorded event", err) |
| 135 | } |
| 136 | if !r.EventRemoved || r.Namespace != q.Previous.Root { |
| 137 | t.Fatal("missing recorded root or completion") |
| 138 | } |
| 139 | if err := fs.Delete(&r, save); err != nil { |
| 140 | t.Fatal("replay", err) |
| 141 | } |
| 142 | if _, err := os.Stat(filepath.Join(saved, r.Authorization.ID)); !errors.Is(err, os.ErrNotExist) { |
| 143 | t.Fatal("event remains", err) |
| 144 | } |
| 145 | } |
| 146 | body, err := os.ReadFile(filepath.Join(filepath.Dir(path), q.name(), "unknown")) |
| 147 | if err != nil || string(body) != "retained unknown bytes" { |
| 148 | t.Fatal("quarantine changed", err) |
| 149 | } |
| 150 | }) |
| 151 | } |
| 152 | } |
| 153 | |
amadan