thin-provisioning-tools/thin-provisioning/thin_check.cc
2020-06-12 13:41:47 +01:00

214 lines
5.2 KiB
C++

// Copyright (C) 2011 Red Hat, Inc. All rights reserved.
//
// This file is part of the thin-provisioning-tools source.
//
// thin-provisioning-tools is free software: you can redistribute it
// and/or modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// thin-provisioning-tools 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with thin-provisioning-tools. If not, see
// <http://www.gnu.org/licenses/>.
#include <iostream>
#include <getopt.h>
#include <libgen.h>
#include <boost/lexical_cast.hpp>
#include <boost/optional.hpp>
#include "version.h"
#include "base/application.h"
#include "base/error_state.h"
#include "base/file_utils.h"
#include "persistent-data/file_utils.h"
#include "thin-provisioning/commands.h"
#include "thin-provisioning/metadata_checker.h"
#include "thin-provisioning/superblock.h"
using namespace base;
using namespace std;
using namespace persistent_data;
using namespace thin_provisioning;
//----------------------------------------------------------------
namespace {
struct flags {
flags()
: ignore_non_fatal_errors(false),
quiet(false),
clear_needs_check_flag_on_success(false) {
}
check_options check_opts;
bool ignore_non_fatal_errors;
bool quiet;
bool clear_needs_check_flag_on_success;
};
void clear_needs_check(string const &path) {
block_manager::ptr bm = open_bm(path, block_manager::READ_WRITE);
superblock_detail::superblock sb = read_superblock(bm);
sb.set_needs_check_flag(false);
write_superblock(bm, sb);
}
// Returns 0 on success, 1 on failure (this gets returned directly
// by main).
int check(string const &path, flags fs) {
bool success = false;
try {
if (file_utils::get_file_length(path) < persistent_data::MD_BLOCK_SIZE) {
cerr << "Metadata device/file too small. Is this binary metadata?"
<< endl;
return 1;
}
block_manager::ptr bm = open_bm(path, block_manager::READ_ONLY,
!fs.check_opts.use_metadata_snap_);
output_options output_opts = !fs.quiet ? OUTPUT_NORMAL : OUTPUT_QUIET;
error_state err = check_metadata(bm, fs.check_opts, output_opts);
if (fs.ignore_non_fatal_errors)
success = (err == FATAL) ? false : true;
else
success = (err == NO_ERROR) ? true : false;
if (success && fs.clear_needs_check_flag_on_success)
clear_needs_check(path);
} catch (std::exception &e) {
if (!fs.quiet)
cerr << e.what() << endl;
return 1;
}
return !success;
}
}
//----------------------------------------------------------------
thin_check_cmd::thin_check_cmd()
: command("thin_check")
{
}
void
thin_check_cmd::usage(std::ostream &out) const
{
out << "Usage: " << get_name() << " [options] {device|file}\n"
<< "Options:\n"
<< " {-q|--quiet}\n"
<< " {-h|--help}\n"
<< " {-V|--version}\n"
<< " {-m|--metadata-snap}\n"
<< " {--override-mapping-root}\n"
<< " {--clear-needs-check-flag}\n"
<< " {--ignore-non-fatal-errors}\n"
<< " {--skip-mappings}\n"
<< " {--super-block-only}" << endl;
}
int
thin_check_cmd::run(int argc, char **argv)
{
int c;
flags fs;
char const shortopts[] = "qhVm";
option const longopts[] = {
{ "quiet", no_argument, NULL, 'q'},
{ "help", no_argument, NULL, 'h'},
{ "version", no_argument, NULL, 'V'},
{ "metadata-snap", no_argument, NULL, 'm'},
{ "super-block-only", no_argument, NULL, 1},
{ "skip-mappings", no_argument, NULL, 2},
{ "ignore-non-fatal-errors", no_argument, NULL, 3},
{ "clear-needs-check-flag", no_argument, NULL, 4 },
{ "override-mapping-root", required_argument, NULL, 5},
{ NULL, no_argument, NULL, 0 }
};
while ((c = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) {
switch(c) {
case 'h':
usage(cout);
return 0;
case 'q':
fs.quiet = true;
break;
case 'V':
cout << THIN_PROVISIONING_TOOLS_VERSION << endl;
return 0;
case 'm':
fs.check_opts.set_metadata_snap();
break;
case 1:
// super-block-only
fs.check_opts.set_superblock_only();
break;
case 2:
// skip-mappings
fs.check_opts.set_skip_mappings();
break;
case 3:
// ignore-non-fatal-errors
fs.ignore_non_fatal_errors = true;
break;
case 4:
// clear needs-check flag
fs.clear_needs_check_flag_on_success = true;
break;
case 5:
// override-mapping-root
fs.check_opts.set_override_mapping_root(boost::lexical_cast<uint64_t>(optarg));
break;
default:
usage(cerr);
return 1;
}
}
if (fs.clear_needs_check_flag_on_success && fs.check_opts.use_metadata_snap_) {
cerr << "--metadata-snap cannot be combined with --clear-needs-check-flag.";
usage(cerr);
exit(1);
}
if (argc == optind) {
if (!fs.quiet) {
cerr << "No input file provided." << endl;
usage(cerr);
}
exit(1);
}
return check(argv[optind], fs);
}
//----------------------------------------------------------------