@ -78,12 +78,14 @@ func (s ErasureStorage) HealFile(staleDisks []StorageAPI, volume, path string, b
blocks [ i ] = make ( [ ] byte , chunksize )
}
var chunkOffset , blockOffset int64
for ; blockOffset < size ; blockOffset += blocksize {
// The for loop below is entered when size == 0 and
// blockOffset == 0 to allow for reconstructing empty files.
for ; blockOffset == 0 || blockOffset < size ; blockOffset += blocksize {
// last iteration may have less than blocksize data
// left, so chunksize needs to be recomputed.
if size < blockOffset + blocksize {
blocksize = size - blockOffset
chunksize = getChunkSize ( blocksize , s . dataBlocks )
chunksize = getChunkSize ( size - blockOffset , s . dataBlocks )
for i := range blocks {
blocks [ i ] = blocks [ i ] [ : chunksize ]
}
@ -121,9 +123,13 @@ func (s ErasureStorage) HealFile(staleDisks []StorageAPI, volume, path string, b
// iteration
chunkOffset += chunksize
// reconstruct data - this computes all data and parity shards
if err = s . ErasureDecodeDataAndParityBlocks ( blocks ) ; err != nil {
return f , err
// reconstruct data - this computes all data and
// parity shards - but we skip this step if we are
// reconstructing an empty file.
if chunksize > 0 {
if err = s . ErasureDecodeDataAndParityBlocks ( blocks ) ; err != nil {
return f , err
}
}
// write computed shards as chunks on file in each