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added backward compatible CRC check and extra explanatory comments (#6233)

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Eugeniy E. Mikhailov 2024-11-12 16:56:14 -05:00 committed by GitHub
parent 31d8907e77
commit 3003c9e17e
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GPG Key ID: B5690EEEBB952194
2 changed files with 10 additions and 3 deletions
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4
weed/storage/needle/needle_read.go
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@ -74,7 +74,9 @@ func (n *Needle) ReadBytes(bytes []byte, offset int64, size Size, version Versio
checksum := util.BytesToUint32(bytes[NeedleHeaderSize+size : NeedleHeaderSize+size+NeedleChecksumSize])
newChecksum := NewCRC(n.Data)
if checksum != newChecksum.Value() && checksum != uint32(newChecksum) {
// the crc.Value() function is to be deprecated. this double checking is for backward compatible.
// the crc.Value() function is to be deprecated. this double checking is for backward compatibility
// with seaweed version using crc.Value() instead of uint32(crc), which appears in commit 056c480eb
// and switch appeared in version 3.09.
stats.VolumeServerHandlerCounter.WithLabelValues(stats.ErrorCRC).Inc()
return errors.New("CRC error! Data On Disk Corrupted")
}

9
weed/storage/volume_read.go
View File

@ -164,7 +164,10 @@ func (v *Volume) readNeedleDataInto(n *needle.Needle, readOption *ReadOption, wr
toWrite := min(count, int(offset+size-x))
if toWrite > 0 {
crc = crc.Update(buf[0:toWrite])
if offset == 0 && size == int64(n.DataSize) && int64(count) == size && (n.Checksum != crc) {
// the crc.Value() function is to be deprecated. this double checking is for backward compatibility
// with seaweed version using crc.Value() instead of uint32(crc), which appears in commit 056c480eb
// and switch appeared in version 3.09.
if offset == 0 && size == int64(n.DataSize) && int64(count) == size && (n.Checksum != crc && uint32(n.Checksum) != crc.Value()) {
// This check works only if the buffer is big enough to hold the whole needle data
// and we ask for all needle data.
// Otherwise we cannot check the validity of partially aquired data.
@ -187,7 +190,9 @@ func (v *Volume) readNeedleDataInto(n *needle.Needle, readOption *ReadOption, wr
}
}
if offset == 0 && size == int64(n.DataSize) && (n.Checksum != crc && uint32(n.Checksum) != crc.Value()) {
// the crc.Value() function is to be deprecated. this double checking is for backward compatible.
// the crc.Value() function is to be deprecated. this double checking is for backward compatibility
// with seaweed version using crc.Value() instead of uint32(crc), which appears in commit 056c480eb
// and switch appeared in version 3.09.
stats.VolumeServerHandlerCounter.WithLabelValues(stats.ErrorCRC).Inc()
return fmt.Errorf("ReadNeedleData checksum %v expected %v for Needle: %v,%v", crc, n.Checksum, v.Id, n)
}