func (m *fileMonitor) copyRemoteBlocks(cc <-chan content, outFile *os.File, writeWg *sync.WaitGroup) {
defer writeWg.Done()
for content := range cc {
_, err := outFile.WriteAt(content.data, content.offset)
buffers.Put(content.data)
if err != nil {
m.writeError = err
return
}
}
}
func (d *Discoverer) externalLookup(node string) (string, bool) {
extIP, err := net.ResolveUDPAddr("udp", d.extServer+":22025")
if err != nil {
log.Printf("discover/external: %v; no external lookup", err)
return "", false
}
conn, err := net.DialUDP("udp", nil, extIP)
if err != nil {
log.Printf("discover/external: %v; no external lookup", err)
return "", false
}
defer conn.Close()
err = conn.SetDeadline(time.Now().Add(5 * time.Second))
if err != nil {
log.Printf("discover/external: %v; no external lookup", err)
return "", false
}
_, err = conn.Write(EncodePacket(Packet{QueryMagic, 0, node, nil}))
if err != nil {
log.Printf("discover/external: %v; no external lookup", err)
return "", false
}
var buf = buffers.Get(256)
defer buffers.Put(buf)
n, err := conn.Read(buf)
if err != nil {
if err, ok := err.(net.Error); ok && err.Timeout() {
// Expected if the server doesn't know about requested node ID
return "", false
}
log.Printf("discover/external/read: %v; no external lookup", err)
return "", false
}
pkt, err := DecodePacket(buf[:n])
if err != nil {
log.Printf("discover/external/read: %v; no external lookup", err)
return "", false
}
if pkt.Magic != AnnouncementMagic {
log.Printf("discover/external/read: bad magic; no external lookup", err)
return "", false
}
return fmt.Sprintf("%s:%d", ipStr(pkt.IP), pkt.Port), true
}
func applyContent(cc <-chan content, dst io.WriterAt) error {
var err error
for c := range cc {
_, err = dst.WriteAt(c.data, c.offset)
buffers.Put(c.data)
if err != nil {
return err
}
}
return nil
}
func (c *rawConnection) processRequest(msgID int, req RequestMessage) {
data, _ := c.receiver.Request(c.id, req.Repository, req.Name, int64(req.Offset), int(req.Size))
c.wmut.Lock()
header{0, msgID, messageTypeResponse}.encodeXDR(c.xw)
c.xw.WriteBytes(data)
err := c.flush()
c.wmut.Unlock()
buffers.Put(data)
if err != nil {
c.close <- err
}
}
func (c *Connection) processRequest(msgID int, req request) {
data, _ := c.receiver.Request(c.ID, req.name, req.offset, req.size, req.hash)
c.Lock()
c.mwriter.writeUint32(encodeHeader(header{0, msgID, messageTypeResponse}))
c.mwriter.writeResponse(data)
err := c.flush()
c.Unlock()
buffers.Put(data)
if err != nil {
c.Close(err)
} else if c.mwriter.err != nil {
c.Close(c.mwriter.err)
}
}
func (p *puller) handleCopyBlock(b bqBlock) {
// We have blocks to copy from the existing file
f := b.file
of := p.openFiles[f.Name]
if debug {
l.Debugf("pull: copying %d blocks for %q / %q", len(b.copy), p.repo, f.Name)
}
var exfd *os.File
exfd, of.err = os.Open(of.filepath)
if of.err != nil {
if debug {
l.Debugf("pull: error: %q / %q: %v", p.repo, f.Name, of.err)
}
of.file.Close()
of.file = nil
p.openFiles[f.Name] = of
return
}
defer exfd.Close()
for _, b := range b.copy {
bs := buffers.Get(int(b.Size))
_, of.err = exfd.ReadAt(bs, b.Offset)
if of.err == nil {
_, of.err = of.file.WriteAt(bs, b.Offset)
}
buffers.Put(bs)
if of.err != nil {
if debug {
l.Debugf("pull: error: %q / %q: %v", p.repo, f.Name, of.err)
}
exfd.Close()
of.file.Close()
of.file = nil
p.openFiles[f.Name] = of
return
}
}
}
func (m *fileMonitor) copyLocalBlocks(inFile, outFile *os.File, writeWg *sync.WaitGroup) {
defer inFile.Close()
defer writeWg.Done()
var buf = buffers.Get(BlockSize)
defer buffers.Put(buf)
for _, lb := range m.localBlocks {
buf = buf[:lb.Size]
_, err := inFile.ReadAt(buf, lb.Offset)
if err != nil {
m.copyError = err
return
}
_, err = outFile.WriteAt(buf, lb.Offset)
if err != nil {
m.copyError = err
return
}
}
}
func (p *puller) handleRequestResult(res requestResult) {
p.oustandingPerNode.decrease(res.node)
f := res.file
of, ok := p.openFiles[f.Name]
if !ok || of.err != nil {
// no entry in openFiles means there was an error and we've cancelled the operation
return
}
_, of.err = of.file.WriteAt(res.data, res.offset)
buffers.Put(res.data)
of.outstanding--
p.openFiles[f.Name] = of
if debug {
l.Debugf("pull: wrote %q / %q offset %d outstanding %d done %v", p.repo, f.Name, res.offset, of.outstanding, of.done)
}
if of.done && of.outstanding == 0 {
p.closeFile(f)
}
}
func (r *marshalReader) readString() string {
bs := r.readBytes()
defer buffers.Put(bs)
return string(bs)
}
func (d *Discoverer) externalLookup(node string) []string {
extIP, err := net.ResolveUDPAddr("udp", d.extServer)
if err != nil {
log.Printf("discover/external: %v; no external lookup", err)
return nil
}
conn, err := net.DialUDP("udp", nil, extIP)
if err != nil {
log.Printf("discover/external: %v; no external lookup", err)
return nil
}
defer conn.Close()
err = conn.SetDeadline(time.Now().Add(5 * time.Second))
if err != nil {
log.Printf("discover/external: %v; no external lookup", err)
return nil
}
buf := QueryV2{QueryMagicV2, node}.MarshalXDR()
_, err = conn.Write(buf)
if err != nil {
log.Printf("discover/external: %v; no external lookup", err)
return nil
}
buffers.Put(buf)
buf = buffers.Get(2048)
defer buffers.Put(buf)
n, err := conn.Read(buf)
if err != nil {
if err, ok := err.(net.Error); ok && err.Timeout() {
// Expected if the server doesn't know about requested node ID
return nil
}
log.Printf("discover/external/read: %v; no external lookup", err)
return nil
}
if debug {
dlog.Printf("read external:\n%s", hex.Dump(buf[:n]))
}
var pkt AnnounceV2
err = pkt.UnmarshalXDR(buf[:n])
if err != nil && err != io.EOF {
log.Println("discover/external/decode:", err)
return nil
}
if debug {
dlog.Printf("parsed external: %#v", pkt)
}
var addrs []string
for _, a := range pkt.This.Addresses {
nodeAddr := fmt.Sprintf("%s:%d", net.IP(a.IP), a.Port)
addrs = append(addrs, nodeAddr)
}
return addrs
}