// AddFreeVolume add free volumes.
func (s *Store) AddFreeVolume(n int, bdir, idir string) (sn int, err error) {
var (
i int
bfile, ifile string
v *Volume
)
s.flock.Lock()
for i = 0; i < n; i++ {
s.FreeId++
bfile, ifile = s.freeFile(s.FreeId, bdir, idir)
if myos.Exist(bfile) || myos.Exist(ifile) {
continue
}
if v, err = NewVolume(volumeFreeId, bfile, ifile, s.conf); err != nil {
// if no free space, delete the file
os.Remove(bfile)
os.Remove(ifile)
break
}
v.Close()
s.FreeVolumes = append(s.FreeVolumes, v)
sn++
}
err = s.saveFreeVolumeIndex()
s.flock.Unlock()
return
}
// freeVolume get a free volume.
func (s *Store) freeVolume(id int32) (v *Volume, err error) {
var (
i int
bfile, nbfile, ifile, nifile, bdir, idir string
)
s.flock.Lock()
defer s.flock.Unlock()
if len(s.FreeVolumes) == 0 {
err = errors.ErrStoreNoFreeVolume
return
}
v = s.FreeVolumes[0]
s.FreeVolumes = s.FreeVolumes[1:]
v.Id = id
bfile, ifile = v.Block.File, v.Indexer.File
bdir, idir = filepath.Dir(bfile), filepath.Dir(ifile)
for {
nbfile, nifile = s.file(id, bdir, idir, i)
if !myos.Exist(nbfile) && !myos.Exist(nifile) {
break
}
i++
}
log.Infof("rename block: %s to %s", bfile, nbfile)
log.Infof("rename index: %s to %s", ifile, nifile)
if err = os.Rename(ifile, nifile); err != nil {
log.Errorf("os.Rename(\"%s\", \"%s\") error(%v)", ifile, nifile, err)
v.Destroy()
return
}
if err = os.Rename(bfile, nbfile); err != nil {
log.Errorf("os.Rename(\"%s\", \"%s\") error(%v)", bfile, nbfile, err)
v.Destroy()
return
}
v.Block.File = nbfile
v.Indexer.File = nifile
if err = v.Open(); err != nil {
v.Destroy()
return
}
err = s.saveFreeVolumeIndex()
return
}