func (db *DB) applyTransactionInternal(tx DBTransaction, writeTxLogFlag bool) (TxID, error) {
logger.Debugf(mylog, "applyTransactionInternal(%+v, writeTxLog: %t)", tx, writeTxLogFlag)
if tx.TxID == AnyVersion {
tx.TxID = db.state.version + 1
} else if tx.TxID != db.state.version+1 {
return 0, fmt.Errorf("Attempted to apply tx %d to dbver %d. Next accepted tx is %d", tx.TxID, db.state.version, db.state.version+1)
}
for _, op := range tx.Ops {
if err := op.Apply(db.state); err != nil {
if rerr := db.RestoreVersion(db.state.version); rerr != nil {
logger.Panicf(mylog, "Following Error: %v. DB rollback failed!!!: %v", err, rerr)
}
return 0, err
}
}
if writeTxLogFlag == writeTxLog {
if err := db.txLogIO.AppendTransaction(tx); err != nil {
if rerr := db.RestoreVersion(db.state.version); rerr != nil {
logger.Panicf(mylog, "Failed to write txlog: %v. DB rollback failed!!!: %v", err, rerr)
}
return 0, fmt.Errorf("Failed to write txlog: %v", err)
}
}
db.state.version = tx.TxID
db.stats.LastTx = time.Now()
return tx.TxID, nil
}
func GenHostName() string {
hostname, err := os.Hostname()
if err != nil {
logger.Panicf(mylog, "Failed to query local hostname: %v", err)
}
pid := os.Getpid()
return fmt.Sprintf("%s-%d", hostname, pid)
}
func (h FileBlobHandle) Size() int64 {
fi, err := h.Fp.Stat()
if err != nil {
logger.Panicf(mylog, "Stat failed: %v", err)
}
return fi.Size()
}
func (h ChunkHeader) WriteTo(w io.Writer, c btncrypt.Cipher) error {
h.FrameEncapsulation = CurrentFrameEncapsulation
if h.PayloadLen > MaxChunkPayloadLen {
return fmt.Errorf("payload length too big: %d", h.PayloadLen)
}
if len(h.OrigFilename) > MaxOrigFilenameLen {
h.OrigFilename = filepath.Base(h.OrigFilename)
if len(h.OrigFilename) > MaxOrigFilenameLen {
h.OrigFilename = "<filename_too_long>"
}
}
if _, err := w.Write([]byte{ChunkSignatureMagic1, ChunkSignatureMagic2}); err != nil {
return fmt.Errorf("Failed to write signature magic: %v", err)
}
if _, err := w.Write([]byte{CurrentFormat}); err != nil {
return fmt.Errorf("Failed to write format byte: %v", err)
}
var b bytes.Buffer
enc := gob.NewEncoder(&b)
if err := enc.Encode(h); err != nil {
return err
}
framelen := ChunkHeaderLength - c.FrameOverhead() - SignatureLength - 1
paddinglen := framelen - b.Len()
if paddinglen < 0 {
logger.Panicf(mylog, "SHOULD NOT BE REACHED: Marshaled ChunkHeader size too large")
}
bew, err := btncrypt.NewWriteCloser(w, c, framelen)
if _, err := b.WriteTo(bew); err != nil {
return fmt.Errorf("Failed to initialize frame encryptor: %v", err)
}
if err != nil {
return fmt.Errorf("Header frame gob payload write failed: %v", err)
}
// zero padding
if _, err := bew.Write(make([]byte, paddinglen)); err != nil {
return fmt.Errorf("Header frame zero padding write failed: %v", err)
}
if err := bew.Close(); err != nil {
return fmt.Errorf("Header frame close failed: %v", err)
}
return nil
}
func (be *CachedBlobEntry) markDirtyWithLock() {
now := time.Now()
be.lastUsed = now
be.lastWrite = now
if be.state == cacheEntryDirty {
return
}
if be.state != cacheEntryClean {
logger.Panicf(mylog, "markDirty called from unexpected state: %+v", be.infoWithLock())
}
be.state = cacheEntryDirty
if be.lastSync.IsZero() {
be.lastSync = time.Now()
}
}
func (f *frameEncryptor) Sync() ([]byte, error) {
if f.Written() > BtnFrameMaxPayload {
return nil, fmt.Errorf("frame payload size exceeding max len: %d > %d", f.Written(), BtnFrameMaxPayload)
}
nonce := util.RandomBytes(f.c.gcm.NonceSize())
f.encrypted = f.encrypted[:len(nonce)]
copy(f.encrypted, nonce)
f.encrypted = f.c.gcm.Seal(f.encrypted, nonce, f.b.Bytes(), nil)
if len(f.encrypted) != f.c.EncryptedFrameSize(f.Written()) {
logger.Panicf(mylog, "EncryptedFrameSize mismatch. expected: %d, actual: %v", f.c.EncryptedFrameSize(f.Written()), len(f.encrypted))
}
f.b.Reset()
return f.encrypted, nil
}
func NewOtaru(cfg *Config, oneshotcfg *OneshotConfig) (*Otaru, error) {
o := &Otaru{}
var err error
key := btncrypt.KeyFromPassword(cfg.Password)
o.C, err = btncrypt.NewCipher(key)
if err != nil {
o.Close()
return nil, fmt.Errorf("Failed to init Cipher: %v", err)
}
o.S = scheduler.NewScheduler()
if !cfg.LocalDebug {
o.Tsrc, err = auth.GetGCloudTokenSource(context.TODO(), cfg.CredentialsFilePath, cfg.TokenCacheFilePath, false)
if err != nil {
o.Close()
return nil, fmt.Errorf("Failed to init GCloudClientSource: %v", err)
}
o.DSCfg = datastore.NewConfig(cfg.ProjectName, cfg.BucketName, o.C, o.Tsrc)
o.GL = datastore.NewGlobalLocker(o.DSCfg, GenHostName(), "FIXME: fill info")
if err := o.GL.Lock(); err != nil {
return nil, err
}
}
o.CacheTgtBS, err = blobstore.NewFileBlobStore(cfg.CacheDir, oflags.O_RDWRCREATE)
if err != nil {
o.Close()
return nil, fmt.Errorf("Failed to init FileBlobStore: %v", err)
}
if !cfg.LocalDebug {
o.DefaultBS, err = gcs.NewGCSBlobStore(cfg.ProjectName, cfg.BucketName, o.Tsrc, oflags.O_RDWRCREATE)
if err != nil {
o.Close()
return nil, fmt.Errorf("Failed to init GCSBlobStore: %v", err)
}
if !cfg.UseSeparateBucketForMetadata {
o.BackendBS = o.DefaultBS
} else {
metabucketname := fmt.Sprintf("%s-meta", cfg.BucketName)
o.MetadataBS, err = gcs.NewGCSBlobStore(cfg.ProjectName, metabucketname, o.Tsrc, oflags.O_RDWRCREATE)
if err != nil {
o.Close()
return nil, fmt.Errorf("Failed to init GCSBlobStore (metadata): %v", err)
}
o.BackendBS = blobstore.Mux{
blobstore.MuxEntry{metadata.IsMetadataBlobpath, o.MetadataBS},
blobstore.MuxEntry{nil, o.DefaultBS},
}
}
} else {
o.BackendBS, err = blobstore.NewFileBlobStore(path.Join(os.Getenv("HOME"), ".otaru", "bbs"), oflags.O_RDWRCREATE)
}
queryFn := chunkstore.NewQueryChunkVersion(o.C)
o.CBS, err = cachedblobstore.New(o.BackendBS, o.CacheTgtBS, o.S, oflags.O_RDWRCREATE /* FIXME */, queryFn)
if err != nil {
o.Close()
return nil, fmt.Errorf("Failed to init CachedBlobStore: %v", err)
}
if err := o.CBS.RestoreState(o.C); err != nil {
logger.Warningf(mylog, "Attempted to restore cachedblobstore state but failed: %v", err)
}
o.CSS = cachedblobstore.NewCacheSyncScheduler(o.CBS)
if !cfg.LocalDebug {
o.SSLoc = datastore.NewINodeDBSSLocator(o.DSCfg)
} else {
logger.Panicf(mylog, "Implement mock sslocator that doesn't depend on gcloud/datastore")
}
o.SIO = blobstoredbstatesnapshotio.New(o.CBS, o.C, o.SSLoc)
if !cfg.LocalDebug {
txio := datastore.NewDBTransactionLogIO(o.DSCfg)
o.TxIO = txio
o.TxIOSS = util.NewSyncScheduler(txio, 300*time.Millisecond)
} else {
o.TxIO = inodedb.NewSimpleDBTransactionLogIO()
}
o.CTxIO = inodedb.NewCachedDBTransactionLogIO(o.TxIO)
if oneshotcfg.Mkfs {
o.IDBBE, err = inodedb.NewEmptyDB(o.SIO, o.CTxIO)
if err != nil {
o.Close()
return nil, fmt.Errorf("NewEmptyDB failed: %v", err)
}
} else {
o.IDBBE, err = inodedb.NewDB(o.SIO, o.CTxIO)
if err != nil {
o.Close()
return nil, fmt.Errorf("NewDB failed: %v", err)
}
}
o.IDBS = inodedb.NewDBService(o.IDBBE)
o.IDBSS = util.NewSyncScheduler(o.IDBS, 30*time.Second)
o.FS = otaru.NewFileSystem(o.IDBS, o.CBS, o.C)
o.MGMT = mgmt.NewServer()
if err := o.runMgmtServer(); err != nil {
o.Close()
return nil, fmt.Errorf("Mgmt server run failed: %v", err)
}
return o, nil
}