Esempio n. 1
0
func (s staticFileNode) Read(req *fuse.ReadRequest, res *fuse.ReadResponse, intr fuse.Intr) fuse.Error {
	if req.Offset > int64(len(s)) {
		return nil
	}
	s = s[req.Offset:]
	size := req.Size
	if size > len(s) {
		size = len(s)
	}
	res.Data = make([]byte, size)
	copy(res.Data, s)
	return nil
}
Esempio n. 2
0
func (s *stat) Read(req *fuse.ReadRequest, res *fuse.ReadResponse, intr fuse.Intr) fuse.Error {
	c := s.content()
	if req.Offset > int64(len(c)) {
		return nil
	}
	c = c[req.Offset:]
	size := req.Size
	if size > len(c) {
		size = len(c)
	}
	res.Data = make([]byte, size)
	copy(res.Data, c)
	return nil
}
Esempio n. 3
0
func (h *mutFileHandle) Read(req *fuse.ReadRequest, res *fuse.ReadResponse, intr fuse.Intr) fuse.Error {
	if h.tmp == nil {
		log.Printf("Read called on camli mutFileHandle without a tempfile set")
		return fuse.EIO
	}

	buf := make([]byte, req.Size)
	n, err := h.tmp.ReadAt(buf, req.Offset)
	if err == io.EOF {
		err = nil
	}
	if err != nil {
		log.Printf("mutFileHandle.Read: %v", err)
		return fuse.EIO
	}
	res.Data = buf[:n]
	return nil
}
Esempio n. 4
0
func (nr *nodeReader) Read(req *fuse.ReadRequest, res *fuse.ReadResponse, intr fuse.Intr) fuse.Error {
	log.Printf("CAMLI nodeReader READ on %v: %#v", nr.n.blobref, req)
	if req.Offset >= nr.fr.Size() {
		return nil
	}
	size := req.Size
	if int64(size)+req.Offset >= nr.fr.Size() {
		size -= int((int64(size) + req.Offset) - nr.fr.Size())
	}
	buf := make([]byte, size)
	n, err := nr.fr.ReadAt(buf, req.Offset)
	if err == io.EOF {
		err = nil
	}
	if err != nil {
		log.Printf("camli read on %v at %d: %v", nr.n.blobref, req.Offset, err)
		return fuse.EIO
	}
	res.Data = buf[:n]
	return nil
}
Esempio n. 5
0
func (nr *nodeReader) Read(req *fuse.ReadRequest, res *fuse.ReadResponse, intr fuse.Intr) fuse.Error {
	log.Printf("CAMLI nodeReader READ on %v: %#v", nr.n.blobref, req)

	// TODO: this isn't incredibly efficient, creating a new
	// FileReader for each read chunk.  We could do better here
	// and re-use a locked pool of readers, trying to find the one
	// with a current offset <= req.Offset first.
	fr, err := nr.ss.NewFileReader(nr.n.fs.fetcher)
	if err != nil {
		panic(err)
	}
	fr.Skip(uint64(req.Offset))
	buf := make([]byte, req.Size)
	n, err := fr.Read(buf)
	if err != nil && err != io.EOF {
		log.Printf("camli read on %v at %d: %v", nr.n.blobref, req.Offset, err)
		return fuse.EIO
	}
	res.Data = buf[:n]
	return nil
}