| 1 | package hostbox |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "database/sql" |
| 6 | "encoding/json" |
| 7 | |
| 8 | "net/url" |
| 9 | "os" |
| 10 | "path/filepath" |
| 11 | |
| 12 | "github.com/carlosframework/platform/internal/hostguard" |
| 13 | _ "modernc.org/sqlite" |
| 14 | ) |
| 15 | |
| 16 | type LaunchFile struct{ Device, Inode uint64 } |
| 17 | type LaunchGroup struct { |
| 18 | RelativePath string |
| 19 | Device, Inode uint64 |
| 20 | InvocationID string |
| 21 | } |
| 22 | type LaunchReservation struct { |
| 23 | NeverIntended bool `json:",omitempty"` |
| 24 | ID, Role, InvocationID, Inputs, State, ProcessStart string |
| 25 | Target hostguard.FenceTarget |
| 26 | Group LaunchGroup |
| 27 | Parent LaunchGroup |
| 28 | Executable LaunchFile |
| 29 | PID int |
| 30 | } |
| 31 | type LaunchInventory struct { |
| 32 | WritersClosed bool `json:"writers_closed,omitempty"` |
| 33 | Completed ProducerCompletion `json:",omitzero"` |
| 34 | ControllerPID int |
| 35 | ProcessStart string |
| 36 | Target hostguard.FenceTarget |
| 37 | Groups []LaunchGroup |
| 38 | Files []LaunchFile |
| 39 | ProducerIDs []string |
| 40 | NoState bool |
| 41 | Reservations []LaunchReservation |
| 42 | } |
| 43 | type LaunchJournal struct { |
| 44 | db *sql.DB |
| 45 | remote JournalCall |
| 46 | path string |
| 47 | identity os.FileInfo |
| 48 | } |
| 49 | |
| 50 | func OpenLaunchJournal(path string) (*LaunchJournal, error) { |
| 51 | if !filepath.IsAbs(path) { |
| 52 | return nil, ErrUnsupported |
| 53 | } |
| 54 | if err := checkJournalPath(path); err != nil { |
| 55 | return nil, err |
| 56 | } |
| 57 | db, err := sql.Open("sqlite", "file:"+url.PathEscape(path)+"?_pragma=busy_timeout(5000)&_pragma=synchronous(FULL)") |
| 58 | if err != nil { |
| 59 | return nil, err |
| 60 | } |
| 61 | db.SetMaxOpenConns(1) |
| 62 | for _, q := range []string{"PRAGMA busy_timeout=5000", "PRAGMA journal_mode=WAL", "PRAGMA synchronous=FULL", "CREATE TABLE IF NOT EXISTS launches (identity TEXT PRIMARY KEY, body BLOB NOT NULL)"} { |
| 63 | if _, err = db.Exec(q); err != nil { |
| 64 | db.Close() |
| 65 | return nil, err |
| 66 | } |
| 67 | } |
| 68 | identity, err := os.Lstat(path) |
| 69 | if err != nil { |
| 70 | db.Close() |
| 71 | return nil, err |
| 72 | } |
| 73 | return &LaunchJournal{db: db, path: path, identity: identity}, nil |
| 74 | } |
| 75 | func (j *LaunchJournal) Close() error { |
| 76 | if j == nil { |
| 77 | return nil |
| 78 | } |
| 79 | if j.remote != nil { |
| 80 | return nil |
| 81 | } |
| 82 | return j.db.Close() |
| 83 | } |
| 84 | func launchKey(t hostguard.FenceTarget) string { |
| 85 | raw, _ := json.Marshal([]any{t.Host, t.Incarnation, t.Stamp, t.Session, t.Box, t.Enrollment, t.BootID, t.ControllerID}) |
| 86 | return string(raw) |
| 87 | } |
| 88 | func SameLaunchOwner(a, b hostguard.FenceTarget) bool { |
| 89 | return a.Host == b.Host && a.Incarnation == b.Incarnation && a.Stamp == b.Stamp && a.Session == b.Session && a.Box == b.Box && a.Enrollment == b.Enrollment && a.BootID == b.BootID && a.ControllerID == b.ControllerID |
| 90 | } |
| 91 | func validLaunchOwner(t hostguard.FenceTarget) bool { |
| 92 | return t.Host != "" && t.Incarnation != "" && t.Stamp > 0 && t.Session > 0 && t.Box != "" && t.Enrollment != "" && t.BootID != "" && t.ControllerID != "" |
| 93 | } |
| 94 | func (j *LaunchJournal) Create(ctx context.Context, in LaunchInventory) error { |
| 95 | if j == nil { |
| 96 | return ErrUnsupported |
| 97 | } |
| 98 | if j.remote != nil { |
| 99 | out, err := journalCall(ctx, j.remote, JournalRequest{Op: "create", Launch: in}) |
| 100 | _ = out |
| 101 | return err |
| 102 | } |
| 103 | |
| 104 | if err := journalIdentity(j.path, j.identity); err != nil { |
| 105 | return err |
| 106 | } |
| 107 | if in.WritersClosed || in.Completed != (ProducerCompletion{}) || !validLaunchOwner(in.Target) || in.ControllerPID <= 0 || in.ProcessStart == "" || len(in.Groups) == 0 || (len(in.Files) == 0 && !in.NoState) || len(in.Reservations) != 0 { |
| 108 | return ErrUnsupported |
| 109 | } |
| 110 | body, err := json.Marshal(in) |
| 111 | if err != nil { |
| 112 | return err |
| 113 | } |
| 114 | _, err = journalExecutorFor(ctx, j.db).ExecContext(ctx, "INSERT INTO launches(identity,body) VALUES(?,?)", launchKey(in.Target), body) |
| 115 | return err |
| 116 | } |
| 117 | |
| 118 | // Prelaunch persists an admitted session's recoverable record before restore |
| 119 | // or materialization. It names this controller and the session's empty parent |
| 120 | // group only. State directories are inventoried before restore; file identities |
| 121 | // and producer reservations are added later. A failure or crash from here on |
| 122 | // leaves the exact tuple root stops and settles. |
| 123 | func (j *LaunchJournal) Prelaunch(ctx context.Context, in LaunchInventory) error { |
| 124 | if j == nil { |
| 125 | return ErrUnsupported |
| 126 | } |
| 127 | if j.remote != nil { |
| 128 | out, err := journalCall(ctx, j.remote, JournalRequest{Op: "prelaunch", Launch: in}) |
| 129 | _ = out |
| 130 | return err |
| 131 | } |
| 132 | |
| 133 | if len(in.Groups) != 1 || in.Groups[0].RelativePath == "" || in.Groups[0].Device == 0 || in.Groups[0].Inode == 0 || in.Groups[0].InvocationID != "" || len(in.Files) != 0 || !in.NoState || len(in.ProducerIDs) != 0 { |
| 134 | return ErrUnsupported |
| 135 | } |
| 136 | in.ProducerIDs = []string{} |
| 137 | return j.Create(ctx, in) |
| 138 | } |
| 139 | |
| 140 | // SessionLaunches returns every record journaled for one writer session of |
| 141 | // this box, whichever boot or controller wrote it. A restarted controller uses |
| 142 | // it to name the original tuple. An empty result never proves emptiness. |
| 143 | func (j *LaunchJournal) SessionLaunches(ctx context.Context, host, incarnation string, stamp, session uint64, box, enrollment string) ([]LaunchInventory, error) { |
| 144 | if j == nil { |
| 145 | return nil, ErrUnsupported |
| 146 | } |
| 147 | if j.remote != nil { |
| 148 | out, err := journalCall(ctx, j.remote, JournalRequest{Op: "session", Target: hostguard.FenceTarget{Host: host, Incarnation: incarnation, Stamp: stamp, Session: session, Box: box, Enrollment: enrollment}}) |
| 149 | return out.Launches, err |
| 150 | } |
| 151 | |
| 152 | if j == nil || j.db == nil || !component(host) || incarnation == "" || stamp == 0 || session == 0 || box == "" || enrollment == "" { |
| 153 | return nil, ErrUnsupported |
| 154 | } |
| 155 | rows, err := journalExecutorFor(ctx, j.db).QueryContext(ctx, "SELECT identity, body FROM launches") |
| 156 | if err != nil { |
| 157 | return nil, err |
| 158 | } |
| 159 | defer rows.Close() |
| 160 | var out []LaunchInventory |
| 161 | for rows.Next() { |
| 162 | var key string |
| 163 | var body []byte |
| 164 | if err = rows.Scan(&key, &body); err != nil { |
| 165 | return nil, err |
| 166 | } |
| 167 | var in LaunchInventory |
| 168 | if err = json.Unmarshal(body, &in); err != nil { |
| 169 | return nil, err |
| 170 | } |
| 171 | if !validLaunchOwner(in.Target) || launchKey(in.Target) != key { |
| 172 | return nil, ErrTypedInventory |
| 173 | } |
| 174 | t := in.Target |
| 175 | if t.Host == host && t.Incarnation == incarnation && t.Stamp == stamp && t.Session == session && t.Box == box && t.Enrollment == enrollment { |
| 176 | out = append(out, in) |
| 177 | } |
| 178 | } |
| 179 | return out, rows.Err() |
| 180 | } |
| 181 | func (j *LaunchJournal) Read(ctx context.Context, t hostguard.FenceTarget) (LaunchInventory, error) { |
| 182 | if j == nil { |
| 183 | return LaunchInventory{}, ErrUnsupported |
| 184 | } |
| 185 | if j.remote != nil { |
| 186 | out, err := journalCall(ctx, j.remote, JournalRequest{Op: "read", Target: t}) |
| 187 | return out.Launch, err |
| 188 | } |
| 189 | |
| 190 | var in LaunchInventory |
| 191 | var raw []byte |
| 192 | if j == nil || j.db == nil || !validLaunchOwner(t) { |
| 193 | return in, ErrUnsupported |
| 194 | } |
| 195 | if err := journalExecutorFor(ctx, j.db).QueryRowContext(ctx, "SELECT body FROM launches WHERE identity=?", launchKey(t)).Scan(&raw); err != nil { |
| 196 | return in, err |
| 197 | } |
| 198 | if err := json.Unmarshal(raw, &in); err != nil { |
| 199 | return in, err |
| 200 | } |
| 201 | if !SameLaunchOwner(in.Target, t) { |
| 202 | return in, ErrChanged |
| 203 | } |
| 204 | return in, nil |
| 205 | } |
| 206 | func (j *LaunchJournal) mutate(ctx context.Context, t hostguard.FenceTarget, fn func(*LaunchInventory) error) error { |
| 207 | if j == nil || j.db == nil || !validLaunchOwner(t) { |
| 208 | return ErrUnsupported |
| 209 | } |
| 210 | tx, commit, rollback, err := journalTransaction(ctx, j.db) |
| 211 | if err != nil { |
| 212 | return err |
| 213 | } |
| 214 | defer rollback() |
| 215 | var raw []byte |
| 216 | if err = tx.QueryRowContext(ctx, "SELECT body FROM launches WHERE identity=?", launchKey(t)).Scan(&raw); err != nil { |
| 217 | return err |
| 218 | } |
| 219 | var in LaunchInventory |
| 220 | if err = json.Unmarshal(raw, &in); err != nil { |
| 221 | return err |
| 222 | } |
| 223 | if !SameLaunchOwner(in.Target, t) { |
| 224 | return ErrChanged |
| 225 | } |
| 226 | if err = fn(&in); err != nil { |
| 227 | return err |
| 228 | } |
| 229 | next, err := json.Marshal(in) |
| 230 | if err != nil { |
| 231 | return err |
| 232 | } |
| 233 | res, err := tx.ExecContext(ctx, "UPDATE launches SET body=? WHERE identity=? AND body=?", next, launchKey(t), raw) |
| 234 | if err != nil { |
| 235 | return err |
| 236 | } |
| 237 | n, err := res.RowsAffected() |
| 238 | if err != nil { |
| 239 | return err |
| 240 | } |
| 241 | if n != 1 { |
| 242 | return ErrChanged |
| 243 | } |
| 244 | return commit() |
| 245 | } |
| 246 | func (j *LaunchJournal) Reserve(ctx context.Context, r LaunchReservation) error { |
| 247 | if j == nil { |
| 248 | return ErrUnsupported |
| 249 | } |
| 250 | if j.remote != nil { |
| 251 | out, err := journalCall(ctx, j.remote, JournalRequest{Op: "reserve", Reservation: r}) |
| 252 | _ = out |
| 253 | return err |
| 254 | } |
| 255 | |
| 256 | if r.NeverIntended || r.ID == "" || r.Role == "" || r.InvocationID == "" || r.Inputs == "" || r.Group.RelativePath == "" || r.Group.Device == 0 || r.Group.Inode == 0 || r.Executable.Device == 0 || r.Executable.Inode == 0 || r.State != "" || r.PID != 0 || r.Group.InvocationID != r.InvocationID { |
| 257 | return ErrUnsupported |
| 258 | } |
| 259 | return j.mutate(ctx, r.Target, func(in *LaunchInventory) error { |
| 260 | found := -1 |
| 261 | for i, old := range in.Reservations { |
| 262 | if old.ID == r.ID || old.Group.RelativePath == r.Group.RelativePath { |
| 263 | expected := r |
| 264 | expected.State = "intended" |
| 265 | expected.Group.Device, expected.Group.Inode = 0, 0 |
| 266 | if old != expected { |
| 267 | return ErrChanged |
| 268 | } |
| 269 | found = i |
| 270 | } |
| 271 | } |
| 272 | if r.Parent.RelativePath != "" && found < 0 { |
| 273 | return ErrChanged |
| 274 | } |
| 275 | r.State = "reserved" |
| 276 | if found >= 0 { |
| 277 | in.Reservations[found] = r |
| 278 | } else { |
| 279 | in.Reservations = append(in.Reservations, r) |
| 280 | } |
| 281 | in.Groups = append(in.Groups, r.Group) |
| 282 | return nil |
| 283 | }) |
| 284 | } |
| 285 | func (j *LaunchJournal) Started(ctx context.Context, r LaunchReservation, pid int, processStart string) error { |
| 286 | if j == nil { |
| 287 | return ErrUnsupported |
| 288 | } |
| 289 | if j.remote != nil { |
| 290 | out, err := journalCall(ctx, j.remote, JournalRequest{Op: "started", Reservation: r, PID: pid, ProcessStart: processStart}) |
| 291 | _ = out |
| 292 | return err |
| 293 | } |
| 294 | |
| 295 | if pid <= 0 || processStart == "" { |
| 296 | return ErrUnsupported |
| 297 | } |
| 298 | return j.mutate(ctx, r.Target, func(in *LaunchInventory) error { |
| 299 | for i := range in.Reservations { |
| 300 | old := &in.Reservations[i] |
| 301 | expected := r |
| 302 | expected.State = "reserved" |
| 303 | if *old == expected { |
| 304 | old.State = "started" |
| 305 | old.PID = pid |
| 306 | old.ProcessStart = processStart |
| 307 | return nil |
| 308 | } |
| 309 | } |
| 310 | return ErrChanged |
| 311 | }) |
| 312 | } |
| 313 | func (j *LaunchJournal) Settled(ctx context.Context, r LaunchReservation) error { |
| 314 | if j == nil { |
| 315 | return ErrUnsupported |
| 316 | } |
| 317 | if j.remote != nil { |
| 318 | out, err := journalCall(ctx, j.remote, JournalRequest{Op: "settled", Reservation: r}) |
| 319 | _ = out |
| 320 | return err |
| 321 | } |
| 322 | |
| 323 | return j.mutate(ctx, r.Target, func(in *LaunchInventory) error { |
| 324 | for i := range in.Reservations { |
| 325 | old := &in.Reservations[i] |
| 326 | expected := r |
| 327 | expected.State = old.State |
| 328 | expected.PID = old.PID |
| 329 | expected.ProcessStart = old.ProcessStart |
| 330 | if *old == expected && (old.State == "reserved" || old.State == "started" || old.State == "settled") { |
| 331 | old.State = "settled" |
| 332 | return nil |
| 333 | } |
| 334 | } |
| 335 | return ErrChanged |
| 336 | }) |
| 337 | } |
| 338 | func (j *LaunchJournal) RecordFile(ctx context.Context, t hostguard.FenceTarget, f LaunchFile) error { |
| 339 | if j == nil { |
| 340 | return ErrUnsupported |
| 341 | } |
| 342 | if j.remote != nil { |
| 343 | out, err := journalCall(ctx, j.remote, JournalRequest{Op: "file", Target: t, File: f}) |
| 344 | _ = out |
| 345 | return err |
| 346 | } |
| 347 | |
| 348 | if f.Device == 0 || f.Inode == 0 { |
| 349 | return ErrUnsupported |
| 350 | } |
| 351 | return j.mutate(ctx, t, func(in *LaunchInventory) error { |
| 352 | for _, old := range in.Files { |
| 353 | if old == f { |
| 354 | return nil |
| 355 | } |
| 356 | } |
| 357 | in.NoState = false |
| 358 | in.Files = append(in.Files, f) |
| 359 | return nil |
| 360 | }) |
| 361 | } |
| 362 | |
| 363 | func (j *LaunchJournal) Remote() bool { return j != nil && j.remote != nil } |
| 364 | |
amadan