thin-provisioning-tools/thin-provisioning/thin_check.cc
Joe Thornber d1a41d01cc [thin-check] print out some info fields.
These are consumed by lvm.
2018-11-09 12:43:21 +00:00

420 lines
11 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 "base/nested_output.h"
#include "persistent-data/data-structures/btree_counter.h"
#include "persistent-data/space-maps/core.h"
#include "persistent-data/space-maps/disk.h"
#include "persistent-data/file_utils.h"
#include "thin-provisioning/metadata.h"
#include "thin-provisioning/device_tree.h"
#include "thin-provisioning/mapping_tree.h"
#include "thin-provisioning/metadata_counter.h"
#include "thin-provisioning/superblock.h"
#include "thin-provisioning/commands.h"
using namespace base;
using namespace std;
using namespace thin_provisioning;
//----------------------------------------------------------------
namespace {
class superblock_reporter : public superblock_detail::damage_visitor {
public:
superblock_reporter(nested_output &out)
: out_(out),
err_(NO_ERROR) {
}
virtual void visit(superblock_detail::superblock_corruption const &d) {
out_ << "superblock is corrupt" << end_message();
{
nested_output::nest _ = out_.push();
out_ << d.desc_ << end_message();
}
err_ << FATAL;
}
base::error_state get_error() const {
return err_;
}
private:
nested_output &out_;
error_state err_;
};
//--------------------------------
class devices_reporter : public device_tree_detail::damage_visitor {
public:
devices_reporter(nested_output &out)
: out_(out),
err_(NO_ERROR) {
}
virtual void visit(device_tree_detail::missing_devices const &d) {
out_ << "missing devices: " << d.keys_ << end_message();
{
nested_output::nest _ = out_.push();
out_ << d.desc_ << end_message();
}
err_ << FATAL;
}
error_state get_error() const {
return err_;
}
private:
nested_output &out_;
error_state err_;
};
//--------------------------------
class mapping_reporter : public mapping_tree_detail::damage_visitor {
public:
mapping_reporter(nested_output &out)
: out_(out),
err_(NO_ERROR) {
}
virtual void visit(mapping_tree_detail::missing_devices const &d) {
out_ << "missing all mappings for devices: " << d.keys_ << end_message();
{
nested_output::nest _ = out_.push();
out_ << d.desc_ << end_message();
}
err_ << FATAL;
}
virtual void visit(mapping_tree_detail::missing_mappings const &d) {
out_ << "thin device " << d.thin_dev_ << " is missing mappings " << d.keys_ << end_message();
{
nested_output::nest _ = out_.push();
out_ << d.desc_ << end_message();
}
err_ << FATAL;
}
error_state get_error() const {
return err_;
}
private:
nested_output &out_;
error_state err_;
};
//--------------------------------
struct flags {
flags()
: check_device_tree(true),
check_mapping_tree_level1(true),
check_mapping_tree_level2(true),
ignore_non_fatal_errors(false),
quiet(false),
clear_needs_check_flag_on_success(false) {
}
bool check_device_tree;
bool check_mapping_tree_level1;
bool check_mapping_tree_level2;
bool ignore_non_fatal_errors;
bool quiet;
boost::optional<block_address> override_mapping_root;
bool clear_needs_check_flag_on_success;
};
error_state check_space_map_counts(flags const &fs, nested_output &out,
superblock_detail::superblock &sb,
block_manager<>::ptr bm,
transaction_manager::ptr tm) {
block_counter bc;
count_metadata(tm, sb, bc);
// Finally we need to check the metadata space map agrees
// with the counts we've just calculated.
error_state err = NO_ERROR;
nested_output::nest _ = out.push();
persistent_space_map::ptr metadata_sm =
open_metadata_sm(*tm, static_cast<void *>(&sb.metadata_space_map_root_));
for (unsigned b = 0; b < metadata_sm->get_nr_blocks(); b++) {
ref_t c_actual = metadata_sm->get_count(b);
ref_t c_expected = bc.get_count(b);
if (c_actual != c_expected) {
out << "metadata reference counts differ for block " << b
<< ", expected " << c_expected
<< ", but got " << c_actual
<< end_message();
err << (c_actual > c_expected ? NON_FATAL : FATAL);
}
}
return err;
}
block_address mapping_root(superblock_detail::superblock const &sb, flags const &fs)
{
return fs.override_mapping_root ? *fs.override_mapping_root : sb.data_mapping_root_;
}
void print_info(superblock_detail::superblock const &sb,
transaction_manager::ptr tm)
{
cout << "TRANSACTION_ID=" << sb.trans_id_ << "\n";
cout << "METADATA_FREE_BLOCKS=" << tm->get_sm()->get_nr_free() << "\n";
}
error_state metadata_check(string const &path, flags fs) {
nested_output out(cerr, 2);
if (fs.quiet)
out.disable();
if (file_utils::get_file_length(path) < persistent_data::MD_BLOCK_SIZE) {
out << "Metadata device/file too small. Is this binary metadata?"
<< end_message();
return FATAL;
}
block_manager<>::ptr bm = open_bm(path);
superblock_reporter sb_rep(out);
devices_reporter dev_rep(out);
mapping_reporter mapping_rep(out);
out << "examining superblock" << end_message();
{
nested_output::nest _ = out.push();
check_superblock(bm, sb_rep);
}
if (sb_rep.get_error() == FATAL) {
if (check_for_xml(bm))
out << "This looks like XML. thin_check only checks the binary metadata format." << end_message();
return FATAL;
}
superblock_detail::superblock sb = read_superblock(bm);
transaction_manager::ptr tm =
open_tm(bm, superblock_detail::SUPERBLOCK_LOCATION);
if (!fs.quiet)
print_info(sb, tm);
if (fs.check_device_tree) {
out << "examining devices tree" << end_message();
{
nested_output::nest _ = out.push();
device_tree dtree(*tm, sb.device_details_root_,
device_tree_detail::device_details_traits::ref_counter());
check_device_tree(dtree, dev_rep);
}
}
if (fs.check_mapping_tree_level1 && !fs.check_mapping_tree_level2) {
out << "examining top level of mapping tree" << end_message();
{
nested_output::nest _ = out.push();
dev_tree dtree(*tm, mapping_root(sb, fs),
mapping_tree_detail::mtree_traits::ref_counter(tm));
check_mapping_tree(dtree, mapping_rep);
}
} else if (fs.check_mapping_tree_level2) {
out << "examining mapping tree" << end_message();
{
nested_output::nest _ = out.push();
mapping_tree mtree(*tm, mapping_root(sb, fs),
mapping_tree_detail::block_traits::ref_counter(tm->get_sm()));
check_mapping_tree(mtree, mapping_rep);
}
}
error_state err = NO_ERROR;
err << sb_rep.get_error() << mapping_rep.get_error() << dev_rep.get_error();
// if we're checking everything, and there were no errors,
// then we should check the space maps too.
if (fs.check_device_tree && fs.check_mapping_tree_level2 && err != FATAL) {
out << "checking space map counts" << end_message();
err << check_space_map_counts(fs, out, sb, bm, tm);
}
return err;
}
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) {
error_state err;
bool success = false;
try {
err = metadata_check(path, fs);
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}" << endl
<< "Options:" << endl
<< " {-q|--quiet}" << endl
<< " {-h|--help}" << endl
<< " {-V|--version}" << endl
<< " {--override-mapping-root}" << endl
<< " {--clear-needs-check-flag}" << endl
<< " {--ignore-non-fatal-errors}" << endl
<< " {--skip-mappings}" << endl
<< " {--super-block-only}" << endl;
}
int
thin_check_cmd::run(int argc, char **argv)
{
int c;
flags fs;
char const shortopts[] = "qhV";
option const longopts[] = {
{ "quiet", no_argument, NULL, 'q'},
{ "help", no_argument, NULL, 'h'},
{ "version", no_argument, NULL, 'V'},
{ "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 1:
// super-block-only
fs.check_device_tree = false;
fs.check_mapping_tree_level1 = false;
fs.check_mapping_tree_level2 = false;
break;
case 2:
// skip-mappings
fs.check_mapping_tree_level2 = false;
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.override_mapping_root = boost::lexical_cast<uint64_t>(optarg);
break;
default:
usage(cerr);
return 1;
}
}
if (argc == optind) {
if (!fs.quiet) {
cerr << "No input file provided." << endl;
usage(cerr);
}
exit(1);
}
return check(argv[optind], fs);
}
//----------------------------------------------------------------