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Issue 45 in weed-fs: [Compact issue] Offset overflow

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New issue 45 by hieu.hcmus@gmail.com: [Compact issue] Offset overflow
http://code.google.com/p/weed-fs/issues/detail?id=45

You are using uint32(Maximum 4Gb) to store needle offset(Maximum 32Gb)
when compacting.
Currently It is ok if the volume size is < 4gb
Change variable "offset" in ScanVolumeFile function to uint64 to fix the
issue.
This commit is contained in:
Chris Lu 2013-09-19 11:06:14 -07:00
parent 82b74c7940
commit 69ac6b6bf6
5 changed files with 16 additions and 13 deletions
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3
go/storage/needle.go
View file

@ -19,6 +19,9 @@ const (
NeedleChecksumSize = 4
)
/*
* Needle file size is limited to 4GB for now.
*/
type Needle struct {
Cookie uint32 `comment:"random number to mitigate brute force lookups"`
Id uint64 `comment:"needle id"`

6
go/storage/needle_read_write.go
View file

@ -17,9 +17,9 @@ const (
LastModifiedBytesLength = 5
)
func (n *Needle) DiskSize() uint32 {
padding := NeedlePaddingSize - ((NeedleHeaderSize + n.Size + NeedleChecksumSize) % NeedlePaddingSize)
return NeedleHeaderSize + n.Size + padding + NeedleChecksumSize
func (n *Needle) DiskSize() int64 {
padding := NeedlePaddingSize - ((NeedleHeaderSize + int64(n.Size) + NeedleChecksumSize) % NeedlePaddingSize)
return NeedleHeaderSize + int64(n.Size) + padding + NeedleChecksumSize
}
func (n *Needle) Append(w io.Writer, version Version) (size uint32, err error) {
if s, ok := w.(io.Seeker); ok {

14
go/storage/volume.go
View file

@ -307,7 +307,7 @@ func (v *Volume) freeze() error {
func ScanVolumeFile(dirname string, id VolumeId,
visitSuperBlock func(SuperBlock) error,
visitNeedle func(n *Needle, offset uint32) error) (err error) {
visitNeedle func(n *Needle, offset int64) error) (err error) {
var v *Volume
if v, err = loadVolumeWithoutIndex(dirname, id); err != nil {
return
@ -318,7 +318,7 @@ func ScanVolumeFile(dirname string, id VolumeId,
version := v.Version()
offset := uint32(SuperBlockSize)
offset := int64(SuperBlockSize)
n, rest, e := ReadNeedleHeader(v.dataFile, version)
if e != nil {
err = fmt.Errorf("cannot read needle header: %s", e)
@ -332,7 +332,7 @@ func ScanVolumeFile(dirname string, id VolumeId,
if err = visitNeedle(n, offset); err != nil {
return
}
offset += NeedleHeaderSize + rest
offset += int64(NeedleHeaderSize + rest)
if n, rest, err = ReadNeedleHeader(v.dataFile, version); err != nil {
if err == io.EOF {
return nil
@ -359,17 +359,17 @@ func (v *Volume) copyDataAndGenerateIndexFile(dstName, idxName string) (err erro
defer idx.Close()
nm := NewNeedleMap(idx)
new_offset := uint32(SuperBlockSize)
new_offset := int64(SuperBlockSize)
err = ScanVolumeFile(v.dir, v.Id, func(superBlock SuperBlock) error {
_, err = dst.Write(superBlock.Bytes())
return err
}, func(n *Needle, offset uint32) error {
}, func(n *Needle, offset int64) error {
nv, ok := v.nm.Get(n.Id)
//glog.V(0).Infoln("file size is", n.Size, "rest", rest)
if ok && nv.Offset*NeedlePaddingSize == offset {
if ok && int64(nv.Offset)*NeedlePaddingSize == offset {
if nv.Size > 0 {
if _, err = nm.Put(n.Id, new_offset/NeedlePaddingSize, n.Size); err != nil {
if _, err = nm.Put(n.Id, uint32(new_offset/NeedlePaddingSize), n.Size); err != nil {
return fmt.Errorf("cannot put needle: %s", err)
}
if _, err = n.Append(dst, v.Version()); err != nil {

2
go/weed/export.go
View file

@ -98,7 +98,7 @@ func runExport(cmd *Command, args []string) bool {
err = storage.ScanVolumeFile(*exportVolumePath, vid, func(superBlock storage.SuperBlock) error {
version = superBlock.Version
return nil
}, func(n *storage.Needle, offset uint32) error {
}, func(n *storage.Needle, offset int64) error {
debug("key", n.Id, "offset", offset, "size", n.Size, "disk_size", n.DiskSize(), "gzip", n.IsGzipped())
nv, ok := nm.Get(n.Id)
if ok && nv.Size > 0 {

4
go/weed/fix.go
View file

@ -45,10 +45,10 @@ func runFix(cmd *Command, args []string) bool {
vid := storage.VolumeId(*fixVolumeId)
err = storage.ScanVolumeFile(*fixVolumePath, vid, func(superBlock storage.SuperBlock) error {
return nil
}, func(n *storage.Needle, offset uint32) error {
}, func(n *storage.Needle, offset int64) error {
debug("key", n.Id, "offset", offset, "size", n.Size, "disk_size", n.DiskSize(), "gzip", n.IsGzipped())
if n.Size > 0 {
count, pe := nm.Put(n.Id, offset/storage.NeedlePaddingSize, n.Size)
count, pe := nm.Put(n.Id, uint32(offset/storage.NeedlePaddingSize), n.Size)
debug("saved", count, "with error", pe)
} else {
debug("skipping deleted file ...")