LCOV - code coverage report
Current view: top level - tests/integration/harness/gkfs.io - pwrite.cpp (source / functions) Hit Total Coverage
Test: coverage.info Lines: 28 40 70.0 %
Date: 2024-04-23 00:09:24 Functions: 3 3 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*
       2             :   Copyright 2018-2024, Barcelona Supercomputing Center (BSC), Spain
       3             :   Copyright 2015-2024, Johannes Gutenberg Universitaet Mainz, Germany
       4             : 
       5             :   This software was partially supported by the
       6             :   EC H2020 funded project NEXTGenIO (Project ID: 671951, www.nextgenio.eu).
       7             : 
       8             :   This software was partially supported by the
       9             :   ADA-FS project under the SPPEXA project funded by the DFG.
      10             : 
      11             :   This file is part of GekkoFS.
      12             : 
      13             :   GekkoFS is free software: you can redistribute it and/or modify
      14             :   it under the terms of the GNU General Public License as published by
      15             :   the Free Software Foundation, either version 3 of the License, or
      16             :   (at your option) any later version.
      17             : 
      18             :   GekkoFS is distributed in the hope that it will be useful,
      19             :   but WITHOUT ANY WARRANTY; without even the implied warranty of
      20             :   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      21             :   GNU General Public License for more details.
      22             : 
      23             :   You should have received a copy of the GNU General Public License
      24             :   along with GekkoFS.  If not, see <https://www.gnu.org/licenses/>.
      25             : 
      26             :   SPDX-License-Identifier: GPL-3.0-or-later
      27             : */
      28             : 
      29             : /* C++ includes */
      30             : #include <CLI/CLI.hpp>
      31             : #include <nlohmann/json.hpp>
      32             : #include <memory>
      33             : #include <fmt/format.h>
      34             : #include <commands.hpp>
      35             : #include <reflection.hpp>
      36             : #include <serialize.hpp>
      37             : #include <binary_buffer.hpp>
      38             : 
      39             : /* C includes */
      40             : #include <sys/types.h>
      41             : #include <sys/stat.h>
      42             : #include <fcntl.h>
      43             : #include <unistd.h>
      44             : 
      45             : using json = nlohmann::json;
      46             : 
      47         536 : struct pwrite_options {
      48             :     bool verbose{};
      49             :     std::string pathname;
      50             :     std::string data;
      51             :     ::size_t count;
      52             :     ::size_t offset;
      53             : 
      54             :     REFL_DECL_STRUCT(pwrite_options, REFL_DECL_MEMBER(bool, verbose),
      55             :                      REFL_DECL_MEMBER(std::string, pathname),
      56             :                      REFL_DECL_MEMBER(std::string, data),
      57             :                      REFL_DECL_MEMBER(::size_t, count),
      58             :                      REFL_DECL_MEMBER(::size_t, offset));
      59             : };
      60             : 
      61             : struct pwrite_output {
      62             :     ::ssize_t retval;
      63             :     int errnum;
      64             : 
      65             :     REFL_DECL_STRUCT(pwrite_output, REFL_DECL_MEMBER(::size_t, retval),
      66             :                      REFL_DECL_MEMBER(int, errnum));
      67             : };
      68             : 
      69             : void
      70           2 : to_json(json& record, const pwrite_output& out) {
      71           2 :     record = serialize(out);
      72           2 : }
      73             : 
      74             : void
      75           2 : pwrite_exec(const pwrite_options& opts) {
      76             : 
      77           2 :     auto fd = ::open(opts.pathname.c_str(), O_WRONLY);
      78             : 
      79           2 :     if(fd == -1) {
      80           0 :         if(opts.verbose) {
      81           0 :             fmt::print(
      82             :                     "pwrite(pathname=\"{}\", buf=\"{}\" count={}, offset={}) = {}, errno: {} [{}]\n",
      83           0 :                     opts.pathname, opts.data, opts.count, opts.offset, fd,
      84           0 :                     errno, ::strerror(errno));
      85           0 :             return;
      86             :         }
      87             : 
      88           0 :         json out = pwrite_output{fd, errno};
      89           0 :         fmt::print("{}\n", out.dump(2));
      90             : 
      91           0 :         return;
      92             :     }
      93             : 
      94           4 :     io::buffer buf(opts.data);
      95           2 :     int rv = ::pwrite(fd, buf.data(), opts.count, opts.offset);
      96             : 
      97           2 :     if(opts.verbose) {
      98           0 :         fmt::print(
      99             :                 "pwrite(pathname=\"{}\", count={}, offset={}) = {}, errno: {} [{}]\n",
     100           0 :                 opts.pathname, opts.count, opts.offset, rv, errno,
     101           0 :                 ::strerror(errno));
     102           0 :         return;
     103             :     }
     104             : 
     105           4 :     json out = pwrite_output{rv, errno};
     106           4 :     fmt::print("{}\n", out.dump(2));
     107             : }
     108             : 
     109             : void
     110         268 : pwrite_init(CLI::App& app) {
     111             : 
     112             :     // Create the option and subcommand objects
     113         268 :     auto opts = std::make_shared<pwrite_options>();
     114         268 :     auto* cmd =
     115         268 :             app.add_subcommand("pwrite", "Execute the pwrite() system call");
     116             : 
     117             :     // Add options to cmd, binding them to opts
     118         268 :     cmd->add_flag("-v,--verbose", opts->verbose,
     119         536 :                   "Produce human writeable output");
     120             : 
     121         536 :     cmd->add_option("pathname", opts->pathname, "Directory name")
     122             :             ->required()
     123         536 :             ->type_name("");
     124             : 
     125         536 :     cmd->add_option("data", opts->data, "Data to write")
     126             :             ->required()
     127         536 :             ->type_name("");
     128             : 
     129         536 :     cmd->add_option("count", opts->count, "Number of bytes to write")
     130             :             ->required()
     131         536 :             ->type_name("");
     132             : 
     133         536 :     cmd->add_option("offset", opts->offset, "Offset to read")
     134             :             ->required()
     135         536 :             ->type_name("");
     136             : 
     137        1074 :     cmd->callback([opts]() { pwrite_exec(*opts); });
     138         268 : }

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