Method do_encode

src/erasure-code/consistency/ECEncoder.cc:96–123

 */
template <>
std::optional<ceph::bufferlist> ECEncoder<stripe_info_o_t>::do_encode(ceph::bufferlist inbl,
                                                                      stripe_info_o_t &sinfo)
{
  ECUtil::shard_extent_map_t encoded_data(&sinfo);

  uint64_t stripe_width = sinfo.get_stripe_width();
  if (inbl.length() % stripe_width != 0) {
    uint64_t pad = stripe_width - inbl.length() % stripe_width;
    inbl.append_zero(pad);
  }

  sinfo.ro_range_to_shard_extent_map(0, inbl.length(), inbl, encoded_data);
  encoded_data.insert_parity_buffers();
  int r = encoded_data.encode(ec_impl);
  if (r < 0) {
    std::cerr << "Failed to encode: " << cpp_strerror(r) << std::endl;
    return {};
  }

  ceph::bufferlist outbl;
  for (const auto &[shard, _] : encoded_data.get_extent_maps()) {
    if (shard >= sinfo.get_k()) {
      encoded_data.get_shard_first_buffer(shard, outbl);
    }
  }

  return outbl;
}

/**
 * Perform encode on the input buffer and place result in the supplied output buffer.