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fix for io.ReaderAt used in filer.remote.sync

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fix https://github.com/seaweedfs/seaweedfs/issues/4194
This commit is contained in:
chrislu 2023-02-17 01:30:55 -08:00
parent a9aa2d581f
commit 545d5d0cc3
1 changed files with 15 additions and 22 deletions
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37
weed/filer/stream.go
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@ -300,31 +300,24 @@ func (c *ChunkStreamReader) prepareBufferFor(offset int64) (err error) {
if c.bufferOffset <= offset && offset < c.bufferOffset+int64(len(c.buffer)) {
return nil
}
if c.chunkView == nil {
return io.EOF
}
glog.V(2).Infof("c.chunkView: %v buffer:[%d,%d) offset:%d totalSize:%d", c.chunkView, c.bufferOffset, c.bufferOffset+int64(len(c.buffer)), offset, c.totalSize)
// fmt.Printf("fetch for offset %d\n", offset)
c.chunkView = c.chunkView.Next
if c.chunkView == nil {
return io.EOF
}
// positioning within the new chunk
chunk := c.chunkView.Value
if insideChunk(offset, chunk) {
if c.isBufferEmpty() || c.bufferOffset != chunk.ViewOffset {
return c.fetchChunkToBuffer(chunk)
}
} else {
for p := c.head; p != nil; p = p.Next {
chunk = p.Value
if insideChunk(offset, chunk) {
if c.isBufferEmpty() || c.bufferOffset != chunk.ViewOffset {
return c.fetchChunkToBuffer(chunk)
}
// find a possible chunk view
p := c.chunkView
for p != nil {
chunk := p.Value
glog.V(2).Infof("prepareBufferFor check chunk:[%d,%d)", chunk.ViewOffset, chunk.ViewOffset+int64(chunk.ViewSize))
if insideChunk(offset, chunk) {
if c.isBufferEmpty() || c.bufferOffset != chunk.ViewOffset {
c.chunkView = p
return c.fetchChunkToBuffer(chunk)
}
}
if offset < c.bufferOffset {
p = p.Prev
} else {
p = p.Next
}
}
return io.EOF