func (p *sessionRecord) readUvarintMayEOF(field string, r io.ByteReader, mayEOF bool) uint64 {
if p.err != nil {
return 0
}
x, err := binary.ReadUvarint(r)
if err != nil {
if err == io.ErrUnexpectedEOF || (mayEOF == false && err == io.EOF) {
p.err = errors.NewErrCorrupted(nil, &ErrManifestCorrupted{field, "short read"})
} else if strings.HasPrefix(err.Error(), "binary:") {
p.err = errors.NewErrCorrupted(nil, &ErrManifestCorrupted{field, err.Error()})
} else {
p.err = err
}
return 0
}
return x
}
func (r *Reader) corrupt(n int, reason string, skip bool) error {
if r.dropper != nil {
r.dropper.Drop(&ErrCorrupted{n, reason})
}
if r.strict && !skip {
r.err = errors.NewErrCorrupted(nil, &ErrCorrupted{n, reason})
return r.err
}
return errSkip
}
func (p *sessionRecord) readLevel(field string, r io.ByteReader) int {
if p.err != nil {
return 0
}
x := p.readUvarint(field, r)
if p.err != nil {
return 0
}
if x >= uint64(p.numLevel) {
p.err = errors.NewErrCorrupted(nil, &ErrManifestCorrupted{field, "invalid level number"})
return 0
}
return int(x)
}
func (p *sessionRecord) readBytes(field string, r byteReader) []byte {
if p.err != nil {
return nil
}
n := p.readUvarint(field, r)
if p.err != nil {
return nil
}
x := make([]byte, n)
_, p.err = io.ReadFull(r, x)
if p.err != nil {
if p.err == io.ErrUnexpectedEOF {
p.err = errors.NewErrCorrupted(nil, &ErrManifestCorrupted{field, "short read"})
}
return nil
}
return x
}
func newErrBatchCorrupted(reason string) error {
return errors.NewErrCorrupted(nil, &ErrBatchCorrupted{reason})
}
// Check and clean files.
func (db *DB) checkAndCleanFiles() error {
v := db.s.version()
defer v.release()
tablesMap := make(map[uint64]bool)
for _, tables := range v.tables {
for _, t := range tables {
tablesMap[t.file.Num()] = false
}
}
files, err := db.s.getFiles(storage.TypeAll)
if err != nil {
return err
}
var nTables int
var rem []storage.File
for _, f := range files {
keep := true
switch f.Type() {
case storage.TypeManifest:
keep = f.Num() >= db.s.manifestFile.Num()
case storage.TypeJournal:
if db.frozenJournalFile != nil {
keep = f.Num() >= db.frozenJournalFile.Num()
} else {
keep = f.Num() >= db.journalFile.Num()
}
case storage.TypeTable:
_, keep = tablesMap[f.Num()]
if keep {
tablesMap[f.Num()] = true
nTables++
}
}
if !keep {
rem = append(rem, f)
}
}
if nTables != len(tablesMap) {
var missing []*storage.FileInfo
for num, present := range tablesMap {
if !present {
missing = append(missing, &storage.FileInfo{Type: storage.TypeTable, Num: num})
db.logf("db@janitor table missing @%d", num)
}
}
return errors.NewErrCorrupted(nil, &errors.ErrMissingFiles{Files: missing})
}
db.logf("db@janitor F·%d G·%d", len(files), len(rem))
for _, f := range rem {
db.logf("db@janitor removing %s-%d", f.Type(), f.Num())
if err := f.Remove(); err != nil {
return err
}
}
return nil
}
func newErrManifestCorrupted(f storage.File, field, reason string) error {
return errors.NewErrCorrupted(f, &ErrManifestCorrupted{field, reason})
}
func newErrIkeyCorrupted(ikey []byte, reason string) error {
return errors.NewErrCorrupted(nil, &ErrIkeyCorrupted{append([]byte{}, ikey...), reason})
}