| 1 | //go:build linux && rootrunner |
| 2 | |
| 3 | package host |
| 4 | |
| 5 | import ( |
| 6 | "errors" |
| 7 | "os" |
| 8 | "path/filepath" |
| 9 | "reflect" |
| 10 | "testing" |
| 11 | "time" |
| 12 | |
| 13 | "github.com/carlosframework/platform/internal/rootstate" |
| 14 | "golang.org/x/sys/unix" |
| 15 | ) |
| 16 | |
| 17 | // Parent authority is a fixture. UID, mount checks, descriptor-relative rename |
| 18 | // and the private store are production; no agent or running root service is used. |
| 19 | func TestRootServingParkQuarantine(t *testing.T) { |
| 20 | runRootServingParkQuarantine(t, []string{"", "lost-rename-reply", "submount", "symlink"}) |
| 21 | } |
| 22 | |
| 23 | func TestRootServingParkUnrecordedReplacement(t *testing.T) { |
| 24 | runRootServingParkQuarantine(t, []string{"lost-fresh-record", "lost-retention-reply", "unrecorded-submount", "repeated-full-disk"}) |
| 25 | } |
| 26 | |
| 27 | func runRootServingParkQuarantine(t *testing.T, faults []string) { |
| 28 | t.Helper() |
| 29 | servingRootRunner(t) |
| 30 | for _, fault := range faults { |
| 31 | t.Run(fault, func(t *testing.T) { |
| 32 | root, err := os.MkdirTemp("/var/lib", "carlos-rootrunner-quarantine-") |
| 33 | if err != nil { |
| 34 | t.Fatal(err) |
| 35 | } |
| 36 | t.Cleanup(func() { |
| 37 | if err := os.RemoveAll(root); err != nil { |
| 38 | t.Error(err) |
| 39 | } |
| 40 | }) |
| 41 | data := filepath.Join(root, "data") |
| 42 | servingRunnerMount(t, data) |
| 43 | state, err := rootstate.Open(filepath.Join(root, "authority"), true, false) |
| 44 | if err != nil { |
| 45 | t.Fatal(err) |
| 46 | } |
| 47 | t.Cleanup(func() { |
| 48 | if err := state.Close(); err != nil { |
| 49 | t.Error(err) |
| 50 | } |
| 51 | }) |
| 52 | fs := newServingParkFS(data, state) |
| 53 | p, parent, err := fs.parent() |
| 54 | if err != nil { |
| 55 | t.Fatal(err) |
| 56 | } |
| 57 | p.Close() |
| 58 | path := filepath.Join(data, "instances", ".serving-parked") |
| 59 | if err := os.Mkdir(path, 0700); err != nil { |
| 60 | t.Fatal(err) |
| 61 | } |
| 62 | if err := os.WriteFile(filepath.Join(path, "unknown"), []byte("retained unknown bytes"), 0600); err != nil { |
| 63 | t.Fatal(err) |
| 64 | } |
| 65 | if fault == "submount" { |
| 66 | if err := unix.Mount(path, path, "", unix.MS_BIND, ""); err != nil { |
| 67 | t.Fatal(err) |
| 68 | } |
| 69 | t.Cleanup(func() { |
| 70 | if err := unix.Unmount(path, 0); err != nil { |
| 71 | t.Error(err) |
| 72 | } |
| 73 | }) |
| 74 | } |
| 75 | if fault == "symlink" { |
| 76 | if err := os.Rename(path, path+"-saved"); err != nil { |
| 77 | t.Fatal(err) |
| 78 | } |
| 79 | if err := os.Symlink(path+"-saved", path); err != nil { |
| 80 | t.Fatal(err) |
| 81 | } |
| 82 | } |
| 83 | ledger := servingParkLedger{state: state, fs: fs, now: time.Now} |
| 84 | recover := func() (servingParkQuarantine, error) { |
| 85 | var q servingParkQuarantine |
| 86 | err := ledger.withNamespace(t.Context(), func() error { var err error; q, err = fs.recoverNamespace(t.Context(), parent); return err }) |
| 87 | return q, err |
| 88 | } |
| 89 | if fault == "lost-rename-reply" { |
| 90 | fs.rename = func(a int, b string, c int, d string, flags uint) error { |
| 91 | if err := unix.Renameat2(a, b, c, d, flags); err != nil { |
| 92 | return err |
| 93 | } |
| 94 | return unix.EIO |
| 95 | } |
| 96 | if _, err := recover(); !errors.Is(err, unix.EIO) { |
| 97 | t.Fatal("lost reply", err) |
| 98 | } |
| 99 | fs.rename = unix.Renameat2 |
| 100 | } |
| 101 | var unrecorded servingArtifactDirectory |
| 102 | if fault == "lost-fresh-record" || fault == "lost-retention-reply" || fault == "unrecorded-submount" || fault == "repeated-full-disk" { |
| 103 | fs.state = quarantineWriteFault{Store: state, before: func(name string, body []byte) error { |
| 104 | var q servingParkQuarantine |
| 105 | if name == "namespace-quarantine.json" && servingParkDecode(body, &q) == nil && q.Fresh.Inode != 0 { |
| 106 | return unix.ENOSPC |
| 107 | } |
| 108 | return nil |
| 109 | }} |
| 110 | if _, err := recover(); !errors.Is(err, unix.ENOSPC) { |
| 111 | t.Fatal("missing fresh identity write failure", err) |
| 112 | } |
| 113 | d, err := os.Open(path) |
| 114 | if err != nil { |
| 115 | t.Fatal(err) |
| 116 | } |
| 117 | unrecorded, err = servingParkDirID(d) |
| 118 | d.Close() |
| 119 | if err != nil { |
| 120 | t.Fatal(err) |
| 121 | } |
| 122 | if err := os.WriteFile(filepath.Join(path, "uncertain"), []byte("unrecorded bytes"), 0600); err != nil { |
| 123 | t.Fatal(err) |
| 124 | } |
| 125 | if fault == "repeated-full-disk" { |
| 126 | if _, err := recover(); !errors.Is(err, unix.ENOSPC) { |
| 127 | t.Fatal("missing second full disk failure", err) |
| 128 | } |
| 129 | } |
| 130 | fs.state = state |
| 131 | if fault == "lost-retention-reply" { |
| 132 | fs.rename = func(a int, b string, c int, d string, flags uint) error { |
| 133 | if err := unix.Renameat2(a, b, c, d, flags); err != nil { |
| 134 | return err |
| 135 | } |
| 136 | return unix.EIO |
| 137 | } |
| 138 | if _, err := recover(); !errors.Is(err, unix.EIO) { |
| 139 | t.Fatal("missing retention reply failure", err) |
| 140 | } |
| 141 | } |
| 142 | fs = newServingParkFS(data, state) |
| 143 | if fault == "unrecorded-submount" { |
| 144 | if err := unix.Mount(path, path, "", unix.MS_BIND, ""); err != nil { |
| 145 | t.Fatal(err) |
| 146 | } |
| 147 | t.Cleanup(func() { |
| 148 | if err := unix.Unmount(path, 0); err != nil { |
| 149 | t.Error(err) |
| 150 | } |
| 151 | }) |
| 152 | } |
| 153 | } |
| 154 | q, err := recover() |
| 155 | if fault == "unrecorded-submount" || fault == "repeated-full-disk" { |
| 156 | if err == nil { |
| 157 | t.Fatal("unrecorded replacement accepted", fault) |
| 158 | } |
| 159 | if _, err := state.Read("namespace.json"); !errors.Is(err, os.ErrNotExist) { |
| 160 | t.Fatal("unsafe namespace published", err) |
| 161 | } |
| 162 | retained := path |
| 163 | if fault == "repeated-full-disk" { |
| 164 | retained = filepath.Join(filepath.Dir(path), q.unrecordedName()) |
| 165 | } |
| 166 | body, err := os.ReadFile(filepath.Join(retained, "uncertain")) |
| 167 | if err != nil || string(body) != "unrecorded bytes" { |
| 168 | t.Fatal("refusal lost unrecorded bytes", err) |
| 169 | } |
| 170 | return |
| 171 | } |
| 172 | if fault == "submount" || fault == "symlink" { |
| 173 | if err == nil { |
| 174 | t.Fatal("unsafe obstruction accepted") |
| 175 | } |
| 176 | if _, err := state.Read("namespace-quarantine.json"); !errors.Is(err, os.ErrNotExist) { |
| 177 | t.Fatal("unsafe quarantine intent", err) |
| 178 | } |
| 179 | return |
| 180 | } |
| 181 | if err != nil || !q.Complete { |
| 182 | t.Fatalf("quarantine: %+v %v", q, err) |
| 183 | } |
| 184 | if q.Obstruction.Mount != parent.Mount || q.Fresh.Mount != parent.Mount { |
| 185 | t.Fatal("quarantine crossed bind mount") |
| 186 | } |
| 187 | if unrecorded.Inode != 0 { |
| 188 | if q.Unrecorded != unrecorded || !q.UnrecordedMoved || q.Fresh == unrecorded { |
| 189 | t.Fatal("unrecorded root became namespace authority") |
| 190 | } |
| 191 | body, err := os.ReadFile(filepath.Join(filepath.Dir(path), q.unrecordedName(), "uncertain")) |
| 192 | if err != nil || string(body) != "unrecorded bytes" { |
| 193 | t.Fatal("retention changed unrecorded bytes", err) |
| 194 | } |
| 195 | } |
| 196 | body, err := os.ReadFile(filepath.Join(data, "instances", q.name(), "unknown")) |
| 197 | if err != nil || string(body) != "retained unknown bytes" { |
| 198 | t.Fatal("quarantine changed bytes", err) |
| 199 | } |
| 200 | fs = newServingParkFS(data, state) |
| 201 | if replay, err := recover(); err != nil || !reflect.DeepEqual(q, replay) { |
| 202 | t.Fatal("fresh-adapter replay", err) |
| 203 | } |
| 204 | r := servingRunnerPark(t, data, state) |
| 205 | if err := fs.CheckParked(&r); err != nil { |
| 206 | t.Fatal("park after quarantine", err) |
| 207 | } |
| 208 | body, err = os.ReadFile(filepath.Join(data, "instances", q.name(), "unknown")) |
| 209 | if err != nil || string(body) != "retained unknown bytes" { |
| 210 | t.Fatal("park touched quarantine", err) |
| 211 | } |
| 212 | }) |
| 213 | } |
| 214 | } |
| 215 | |
amadan