| 1 | //go:build linux && rootrunner |
| 2 | |
| 3 | package host |
| 4 | |
| 5 | import ( |
| 6 | "context" |
| 7 | "encoding/json" |
| 8 | "os" |
| 9 | "path/filepath" |
| 10 | "strings" |
| 11 | "testing" |
| 12 | |
| 13 | "github.com/carlosframework/platform/internal/release" |
| 14 | "github.com/carlosframework/platform/internal/rootstate" |
| 15 | "golang.org/x/sys/unix" |
| 16 | ) |
| 17 | |
| 18 | const claimUnitRebootDir = "/var/lib/carlos-e51-unit-reboot" |
| 19 | |
| 20 | func claimUnitRebootFixture(t *testing.T, create bool) (claimUnitMaterializer, claimUnitBinding, claimUnitFiles) { |
| 21 | t.Helper() |
| 22 | dir := claimUnitRebootDir |
| 23 | if create { |
| 24 | if err := os.Mkdir(dir, 0755); err != nil { |
| 25 | t.Fatal(err) |
| 26 | } |
| 27 | } |
| 28 | state, err := rootstate.Open(filepath.Join(dir, "records"), create, false) |
| 29 | if err != nil { |
| 30 | t.Fatal(err) |
| 31 | } |
| 32 | t.Cleanup(func() { state.Close() }) |
| 33 | if create { |
| 34 | if err := os.Mkdir(filepath.Join(dir, "units"), 0755); err != nil { |
| 35 | t.Fatal(err) |
| 36 | } |
| 37 | } |
| 38 | files := claimUnitFiles{dir: filepath.Join(dir, "units")} |
| 39 | m := claimUnitMaterializer{state: state, read: files.read, create: files.create, replace: files.replace, idle: func(string) error { return nil }} |
| 40 | _, in, s := plan14UnitBindingFixture(t, "plan14-reboot.service", "", "") |
| 41 | s.Program = strings.Repeat("a", 64) |
| 42 | b := claimUnitBinding{Schema: 1, Owner: unitBindingOwner(in), Shape: s} |
| 43 | return m, b, files |
| 44 | } |
| 45 | |
| 46 | func TestRootRebootClaimUnitDevicePhase1(t *testing.T) { |
| 47 | m, b, _ := claimUnitRebootFixture(t, true) |
| 48 | if err := m.install(t.Context(), b); err != nil { |
| 49 | t.Fatal(err) |
| 50 | } |
| 51 | r, err := m.load(b.Owner.Host) |
| 52 | if err != nil || r.Identity.Handle == "" { |
| 53 | t.Fatal("persistent unit identity", r, err) |
| 54 | } |
| 55 | raw, _ := json.Marshal(r.Identity) |
| 56 | if err := os.WriteFile(filepath.Join(claimUnitRebootDir, "before.json"), raw, 0600); err != nil { |
| 57 | t.Fatal(err) |
| 58 | } |
| 59 | dir, err := os.Open(filepath.Join(claimUnitRebootDir, "units")) |
| 60 | if err != nil { |
| 61 | t.Fatal(err) |
| 62 | } |
| 63 | treeProof, err := rootstate.PersistentIdentity(dir) |
| 64 | dir.Close() |
| 65 | if err != nil { |
| 66 | t.Fatal(err) |
| 67 | } |
| 68 | binding := release.GenerationBinding{Path: filepath.Join(claimUnitRebootDir, "units", b.Shape.Unit), Tree: filepath.Join(claimUnitRebootDir, "units"), Executable: rootstate.FileIdentity{Device: r.Identity.Device, Inode: r.Identity.Inode}, TreeIdentity: rootstate.FileIdentity{Device: treeProof.Device, Inode: treeProof.Inode}, ExecutableProof: r.Identity, TreeProof: treeProof, Target: release.GenerationOwner{BootID: r.Identity.Boot}} |
| 69 | raw, _ = json.Marshal(binding) |
| 70 | if err := os.WriteFile(filepath.Join(claimUnitRebootDir, "generation.json"), raw, 0600); err != nil { |
| 71 | t.Fatal(err) |
| 72 | } |
| 73 | t.Logf("before boot=%s device=%d mount=%d", r.Identity.Boot, r.Identity.Device, r.Identity.Mount) |
| 74 | claimRebootPredecessorPhase1(t) |
| 75 | } |
| 76 | |
| 77 | func TestRootRebootClaimUnitDevicePhase2(t *testing.T) { |
| 78 | m, b, files := claimUnitRebootFixture(t, false) |
| 79 | t.Cleanup(func() { os.RemoveAll(claimUnitRebootDir) }) |
| 80 | var before rootstate.FileIdentity |
| 81 | raw, err := os.ReadFile(filepath.Join(claimUnitRebootDir, "before.json")) |
| 82 | if err != nil || json.Unmarshal(raw, &before) != nil { |
| 83 | t.Fatal(err) |
| 84 | } |
| 85 | _, current, err := files.read(b.Shape.Unit) |
| 86 | if err != nil || before.Boot == current.Boot { |
| 87 | t.Fatal("actual reboot required", err) |
| 88 | } |
| 89 | t.Logf("after boot=%s device=%d mount=%d", current.Boot, current.Device, current.Mount) |
| 90 | claimRebootPredecessorPhase2(t) |
| 91 | if err = m.verify(b); err != nil { |
| 92 | t.Fatal("persistent unit rejected after reboot", err) |
| 93 | } |
| 94 | r, err := m.load(b.Owner.Host) |
| 95 | if err != nil { |
| 96 | t.Fatal(err) |
| 97 | } |
| 98 | // Force numerical drift too, even if this reboot reused a number. |
| 99 | r.Identity.Device = current.Device + 1 |
| 100 | r.Identity.Mount = current.Mount + 1 |
| 101 | if err = m.save(r); err != nil { |
| 102 | t.Fatal(err) |
| 103 | } |
| 104 | if err = m.verify(b); err != nil { |
| 105 | t.Fatal("boot-local numbers treated as persistent", err) |
| 106 | } |
| 107 | var binding release.GenerationBinding |
| 108 | raw, err = os.ReadFile(filepath.Join(claimUnitRebootDir, "generation.json")) |
| 109 | if err != nil || json.Unmarshal(raw, &binding) != nil { |
| 110 | t.Fatal(err) |
| 111 | } |
| 112 | binding.Executable.Device = current.Device + 1 |
| 113 | binding.TreeIdentity.Device = current.Device + 1 |
| 114 | binding.ExecutableProof.Device = current.Device + 1 |
| 115 | binding.TreeProof.Device = current.Device + 1 |
| 116 | local, err := generationCurrentFiles(binding, rootstate.OpenTrustedFile) |
| 117 | if err != nil || local.Executable.Device != current.Device || local.TreeIdentity.Device != current.Device { |
| 118 | t.Fatal("generation remapping", local, err) |
| 119 | } |
| 120 | if _, err = generationTree(t.Context(), local); err != nil { |
| 121 | t.Fatal("generation tree census", err) |
| 122 | } |
| 123 | mounts, err := os.ReadFile("/proc/self/mountinfo") |
| 124 | if err != nil { |
| 125 | t.Fatal(err) |
| 126 | } |
| 127 | if err = generationMounts(mounts, local); err != nil { |
| 128 | t.Fatal("generation mount census", err) |
| 129 | } |
| 130 | // Same filesystem, same inode through a substituted bind mount still refuses. |
| 131 | unitPath := filepath.Join(files.dir, b.Shape.Unit) |
| 132 | if err = unix.Mount(unitPath, unitPath, "", unix.MS_BIND, ""); err != nil { |
| 133 | t.Fatal(err) |
| 134 | } |
| 135 | rejected := m.verify(b) |
| 136 | _, generationRejected := generationCurrentFiles(binding, rootstate.OpenTrustedFile) |
| 137 | if generationRejected == nil { |
| 138 | t.Error("generation accepted substituted mount") |
| 139 | } |
| 140 | unmount := unix.Unmount(unitPath, 0) |
| 141 | if rejected == nil || unmount != nil { |
| 142 | t.Fatal("substituted mount", rejected, unmount) |
| 143 | } |
| 144 | // A different filesystem cannot use identical file bytes as identity. |
| 145 | original, _, err := files.read(b.Shape.Unit) |
| 146 | if err != nil { |
| 147 | t.Fatal(err) |
| 148 | } |
| 149 | if err = unix.Mount("tmpfs", files.dir, "tmpfs", 0, "mode=0755"); err != nil { |
| 150 | t.Fatal(err) |
| 151 | } |
| 152 | writeErr := os.WriteFile(unitPath, original, 0644) |
| 153 | rejected = m.verify(b) |
| 154 | unmount = unix.Unmount(files.dir, 0) |
| 155 | if writeErr != nil || rejected == nil || unmount != nil { |
| 156 | t.Fatal("substituted filesystem", writeErr, rejected, unmount) |
| 157 | } |
| 158 | if err = m.verify(b); err != nil { |
| 159 | t.Fatal("restored unit", err) |
| 160 | } |
| 161 | if err = m.retire(t.Context(), b, func() error { return nil }); err != nil { |
| 162 | t.Fatal("cross-boot retirement", err) |
| 163 | } |
| 164 | old := b |
| 165 | old.Retiring = true |
| 166 | old.Retired = true |
| 167 | next := b |
| 168 | next.Owner.Stamp++ |
| 169 | if err = m.handover(t.Context(), old, next); err != nil { |
| 170 | t.Fatal("successor handover", err) |
| 171 | } |
| 172 | if err = m.verify(next); err != nil { |
| 173 | t.Fatal(err) |
| 174 | } |
| 175 | if err = m.retire(context.Background(), b, func() error { return nil }); err == nil { |
| 176 | t.Fatal("old owner retired successor") |
| 177 | } |
| 178 | } |
| 179 | |
amadan