Program Listing for File malleability.cpp

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/*
  Copyright 2018-2025, Barcelona Supercomputing Center (BSC), Spain
  Copyright 2015-2025, Johannes Gutenberg Universitaet Mainz, Germany

  This software was partially supported by the
  EC H2020 funded project NEXTGenIO (Project ID: 671951, www.nextgenio.eu).

  This software was partially supported by the
  ADA-FS project under the SPPEXA project funded by the DFG.

  This software was partially supported by the
  the European Union’s Horizon 2020 JTI-EuroHPC research and
  innovation programme, by the project ADMIRE (Project ID: 956748,
  admire-eurohpc.eu)

  This project was partially promoted by the Ministry for Digital Transformation
  and the Civil Service, within the framework of the Recovery,
  Transformation and Resilience Plan - Funded by the European Union
  -NextGenerationEU.

  This file is part of GekkoFS' POSIX interface.

  GekkoFS' POSIX interface is free software: you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public License as
  published by the Free Software Foundation, either version 3 of the License,
  or (at your option) any later version.

  GekkoFS' POSIX interface is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with GekkoFS' POSIX interface.  If not, see
  <https://www.gnu.org/licenses/>.

  SPDX-License-Identifier: LGPL-3.0-or-later
*/

#include <client/user_functions.hpp>
#include <client/preload.hpp>
#include <client/rpc/forward_malleability.hpp>
#include <client/logging.hpp>

#include <iostream>

using namespace std;

namespace gkfs::malleable {

int
expand_start(int old_server_conf, int new_server_conf) {
    LOG(INFO, "{}() Expand operation enter", __func__);
    // sanity checks
    if(old_server_conf == new_server_conf) {
        auto err_str =
                "ERR: Old server configuration is the same as the new one";
        cerr << err_str << endl;
        LOG(ERROR, "{}() {}", __func__, err_str);
        return -1;
    }
    if(CTX->hosts().size() != static_cast<uint64_t>(old_server_conf)) {
        auto err_str =
                "ERR: Old server configuration does not match the number of hosts in hostsfile";
        cerr << err_str << endl;
        LOG(ERROR, "{}() {}", __func__, err_str);
        return -1;
    }
    // TODO check that hostsfile contains endmarker
    return gkfs::malleable::rpc::forward_expand_start(old_server_conf,
                                                      new_server_conf);
}

int
expand_status() {
    LOG(INFO, "{}() enter", __func__);
    auto res = gkfs::malleable::rpc::forward_expand_status();
    LOG(INFO, "{}() '{}' nodes working on extend operation.", __func__, res);
    return res;
}

int
expand_finalize() {
    LOG(INFO, "{}() enter", __func__);
    auto res = gkfs::malleable::rpc::forward_expand_finalize();
    LOG(INFO, "{}() extend operation finalized. ", __func__);
    return res;
}

} // namespace gkfs::malleable