Method export_file

src/tools/ceph_objectstore_tool.cc:846–1009

}

int ObjectStoreTool::export_file(ObjectStore *store, coll_t cid, ghobject_t &obj, bool force)
{
  struct stat st;
  mysize_t total;
  footer ft;

  auto ch = store->open_collection(cid);
  if (!ch) {
    cerr << "Collection " << cid << " does not exist" << std::endl;
    return -ENOENT;
  }
  int ret = store->stat(ch, obj, &st);
  if (ret < 0)
    return ret;

  cerr << "Read " << obj << std::endl;

  total = st.st_size;
  if (debug)
    cerr << "size=" << total << std::endl;

  object_begin objb(obj);

  {
    bufferptr bp;
    bufferlist bl;
    ret = store->getattr(ch, obj, OI_ATTR, bp);
    if (ret < 0) {
      cerr << "getattr failure: " << cpp_strerror(ret)
           << " at obj:" << obj
           << (force ? " IGNORED" : "")
           << std::endl;
      if (!force) {
        return ret;
      }
    } else {
      bl.push_back(bp);
      decode(objb.oi, bl);
      if (debug)
        cerr << "object_info: " << objb.oi << std::endl;
    }
  }

  // NOTE: we include whiteouts, lost, etc.

  ret = write_section(TYPE_OBJECT_BEGIN, objb, file_fd);
  if (ret < 0)
    return ret;

  uint64_t offset = 0;
  bufferlist rawdatabl;
  while(total > 0) {
    rawdatabl.clear();
    mysize_t len = max_read;
    if (len > total)
      len = total;

    ret = store->read(ch, obj, offset, len, rawdatabl);