thin-provisioning-tools/thin-provisioning/thin_check.cc

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// 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 "version.h"
#include "thin-provisioning/device_tree.h"
#include "thin-provisioning/file_utils.h"
#include "thin-provisioning/mapping_tree.h"
#include "thin-provisioning/superblock.h"
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using namespace persistent_data;
using namespace std;
using namespace thin_provisioning;
//----------------------------------------------------------------
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namespace {
enum error_state {
NO_ERROR,
NON_FATAL, // eg, lost blocks
FATAL // needs fixing before pool can be activated
};
error_state
combine_errors(error_state lhs, error_state rhs) {
switch (lhs) {
case NO_ERROR:
return rhs;
case NON_FATAL:
return (rhs == FATAL) ? FATAL : lhs;
default:
return lhs;
}
}
block_manager<>::ptr open_bm(string const &path) {
block_address nr_blocks = get_nr_blocks(path);
typename block_io<>::mode m = block_io<>::READ_ONLY;
return block_manager<>::ptr(new block_manager<>(path, nr_blocks, 1, m));
}
class superblock_reporter : public superblock_detail::damage_visitor {
public:
superblock_reporter(ostream &out)
: out_(out),
err_(NO_ERROR) {
}
virtual void visit(superblock_detail::superblock_corruption const &d) {
out_ << "superblock is corrupt";
err_ = combine_errors(err_, FATAL);
}
error_state get_error() const {
return err_;
}
private:
ostream &out_;
error_state err_;
};
error_state metadata_check(string const &path) {
block_manager<>::ptr bm = open_bm(path);
superblock_reporter sb_rep(cerr);
check_superblock(bm, sb_rep);
return sb_rep.get_error();
}
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int check(string const &path, bool quiet) {
error_state err;
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try {
// FIXME: use quiet flag (pass different reporter)
err = metadata_check(path);
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} catch (std::exception &e) {
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if (!quiet)
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cerr << e.what() << endl;
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return 1;
}
return (err == NO_ERROR) ? 0 : 1;
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}
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void usage(ostream &out, string const &cmd) {
out << "Usage: " << cmd << " [options] {device|file}" << endl
<< "Options:" << endl
<< " {-q|--quiet}" << endl
<< " {-h|--help}" << endl
<< " {-V|--version}" << endl
<< " {--super-block-only}" << endl;
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}
}
int main(int argc, char **argv)
{
int c;
bool quiet = false, superblock_only = false;
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const char shortopts[] = "qhV";
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const struct option longopts[] = {
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{ "quiet", no_argument, NULL, 'q'},
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{ "help", no_argument, NULL, 'h'},
{ "version", no_argument, NULL, 'V'},
{ "super-block-only", no_argument, NULL, 1},
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{ NULL, no_argument, NULL, 0 }
};
while ((c = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) {
switch(c) {
case 'h':
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usage(cout, basename(argv[0]));
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return 0;
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case 'q':
quiet = true;
break;
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case 'V':
cout << THIN_PROVISIONING_TOOLS_VERSION << endl;
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return 0;
case 1:
superblock_only = true;
break;
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default:
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usage(cerr, basename(argv[0]));
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return 1;
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}
}
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if (argc == optind) {
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cerr << "No input file provided." << endl;
usage(cerr, basename(argv[0]));
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exit(1);
}
return check(argv[optind], quiet);
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}