Method init

src/librbd/api/Config.cc:83–125

  }

  int init() {
    CephContext *cct = (CephContext *)m_io_ctx.cct();

    for (auto& [k,v] : *this) {
      int r = cct->_conf.get_val(k, &v.first);
      ceph_assert(r == 0);
      v.second = RBD_CONFIG_SOURCE_CONFIG;
    }

    std::string last_key = ImageCtx::METADATA_CONF_PREFIX;
    bool more_results = true;

    while (more_results) {
      std::map<std::string, bufferlist> pairs;

      int r = librbd::api::PoolMetadata<>::list(m_io_ctx, last_key, MAX_KEYS,
                                                &pairs);
      if (r < 0) {
        return r;
      }

      if (pairs.empty()) {
        break;
      }

      more_results = (pairs.size() == MAX_KEYS);
      last_key = pairs.rbegin()->first;

      for (auto kv : pairs) {
        std::string key;
        if (!util::is_metadata_config_override(kv.first, &key)) {
          more_results = false;
          break;
        }
        auto it = find(key);
        if (it != end()) {
          it->second = {{kv.second.c_str(), kv.second.length()},
                        RBD_CONFIG_SOURCE_POOL};
        }
      }
    }
    return 0;
  }
};

} // anonymous namespace