414 lines
9.0 KiB
C++
414 lines
9.0 KiB
C++
// Copyright (C) 2011 Red Hat, Inc. All rights reserved.
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//
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// This file is part of the thin-provisioning-tools source.
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//
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// thin-provisioning-tools is free software: you can redistribute it
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// and/or modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation, either version 3 of
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// the License, or (at your option) any later version.
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//
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// thin-provisioning-tools is distributed in the hope that it will be
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// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with thin-provisioning-tools. If not, see
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// <http://www.gnu.org/licenses/>.
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#include <iostream>
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#include <getopt.h>
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#include <libgen.h>
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#include "version.h"
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#include "persistent-data/space-maps/core.h"
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#include "thin-provisioning/device_tree.h"
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#include "thin-provisioning/file_utils.h"
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#include "thin-provisioning/mapping_tree.h"
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#include "thin-provisioning/superblock.h"
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using namespace std;
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using namespace thin_provisioning;
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//----------------------------------------------------------------
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namespace {
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class end_message {};
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class nested_output {
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public:
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nested_output(ostream &out, unsigned step)
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: out_(out),
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step_(step),
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beginning_of_line_(true),
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enabled_(true),
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indent_(0) {
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}
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template <typename T>
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nested_output &operator <<(T const &t) {
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if (beginning_of_line_) {
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beginning_of_line_ = false;
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indent();
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}
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if (enabled_)
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out_ << t;
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return *this;
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}
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nested_output &operator <<(end_message const &m) {
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beginning_of_line_ = true;
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if (enabled_)
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out_ << endl;
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return *this;
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}
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void inc_indent() {
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indent_ += step_;
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}
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void dec_indent() {
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indent_ -= step_;
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}
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struct nest {
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nest(nested_output &out)
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: out_(out) {
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out_.inc_indent();
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}
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~nest() {
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out_.dec_indent();
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}
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nested_output &out_;
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};
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nest push() {
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return nest(*this);
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}
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void enable() {
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enabled_ = true;
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}
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void disable() {
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enabled_ = false;
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}
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private:
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void indent() {
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if (enabled_)
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for (unsigned i = 0; i < indent_; i++)
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out_ << ' ';
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}
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ostream &out_;
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unsigned step_;
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bool beginning_of_line_;
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bool enabled_;
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unsigned indent_;
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};
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//--------------------------------
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enum error_state {
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NO_ERROR,
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NON_FATAL, // eg, lost blocks
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FATAL // needs fixing before pool can be activated
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};
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error_state
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combine_errors(error_state lhs, error_state rhs) {
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switch (lhs) {
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case NO_ERROR:
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return rhs;
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case NON_FATAL:
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return (rhs == FATAL) ? FATAL : lhs;
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default:
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return lhs;
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}
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}
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//--------------------------------
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block_manager<>::ptr
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open_bm(string const &path) {
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block_address nr_blocks = get_nr_blocks(path);
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typename block_io<>::mode m = block_io<>::READ_ONLY;
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return block_manager<>::ptr(new block_manager<>(path, nr_blocks, 1, m));
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}
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transaction_manager::ptr
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open_tm(block_manager<>::ptr bm) {
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space_map::ptr sm(new core_map(bm->get_nr_blocks()));
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sm->inc(superblock_detail::SUPERBLOCK_LOCATION);
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transaction_manager::ptr tm(new transaction_manager(bm, sm));
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return tm;
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}
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//--------------------------------
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class superblock_reporter : public superblock_detail::damage_visitor {
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public:
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superblock_reporter(nested_output &out)
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: out_(out),
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err_(NO_ERROR) {
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}
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virtual void visit(superblock_detail::superblock_corruption const &d) {
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out_ << "superblock is corrupt" << end_message();
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{
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nested_output::nest _ = out_.push();
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out_ << d.desc_ << end_message();
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}
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err_ = combine_errors(err_, FATAL);
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}
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error_state get_error() const {
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return err_;
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}
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private:
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nested_output &out_;
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error_state err_;
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};
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//--------------------------------
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class devices_reporter : public device_tree_detail::damage_visitor {
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public:
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devices_reporter(nested_output &out)
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: out_(out),
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err_(NO_ERROR) {
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}
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virtual void visit(device_tree_detail::missing_devices const &d) {
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out_ << "missing devices: " << d.keys_ << end_message();
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{
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nested_output::nest _ = out_.push();
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out_ << d.desc_ << end_message();
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}
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err_ = combine_errors(err_, FATAL);
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}
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error_state get_error() const {
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return err_;
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}
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private:
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nested_output &out_;
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error_state err_;
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};
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//--------------------------------
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class mapping_reporter : public mapping_tree_detail::damage_visitor {
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public:
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mapping_reporter(nested_output &out)
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: out_(out) {
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}
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virtual void visit(mapping_tree_detail::missing_devices const &d) {
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out_ << "missing all mappings for devices: " << d.keys_ << end_message();
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{
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nested_output::nest _ = out_.push();
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out_ << d.desc_ << end_message();
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}
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err_ = combine_errors(err_, FATAL);
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}
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virtual void visit(mapping_tree_detail::missing_mappings const &d) {
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out_ << "thin device " << d.thin_dev_ << " is missing mappings " << d.keys_ << end_message();
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{
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nested_output::nest _ = out_.push();
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out_ << d.desc_ << end_message();
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}
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err_ = combine_errors(err_, FATAL);
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}
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private:
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nested_output &out_;
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error_state err_;
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};
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//--------------------------------
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struct flags {
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bool check_device_tree;
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bool check_mapping_tree_level1;
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bool check_mapping_tree_level2;
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bool ignore_non_fatal_errors;
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bool quiet;
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};
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error_state metadata_check(string const &path, flags fs) {
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block_manager<>::ptr bm = open_bm(path);
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nested_output out(cerr, 2);
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if (fs.quiet)
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out.disable();
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superblock_reporter sb_rep(out);
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devices_reporter dev_rep(out);
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mapping_reporter mapping_rep(out);
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out << "examining superblock" << end_message();
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{
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nested_output::nest _ = out.push();
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check_superblock(bm, sb_rep);
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}
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if (sb_rep.get_error() == FATAL)
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return FATAL;
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superblock_detail::superblock sb = read_superblock(bm);
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transaction_manager::ptr tm = open_tm(bm);
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if (fs.check_device_tree) {
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out << "examining devices tree" << end_message();
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{
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nested_output::nest _ = out.push();
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device_tree dtree(tm, sb.device_details_root_,
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device_tree_detail::device_details_traits::ref_counter());
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check_device_tree(dtree, dev_rep);
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}
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}
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if (fs.check_mapping_tree_level1 && !fs.check_mapping_tree_level2) {
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out << "examining top level of mapping tree" << end_message();
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{
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nested_output::nest _ = out.push();
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dev_tree dtree(tm, sb.data_mapping_root_,
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mapping_tree_detail::mtree_traits::ref_counter(tm));
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check_mapping_tree(dtree, mapping_rep);
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}
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} else if (fs.check_mapping_tree_level2) {
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out << "examining mapping tree" << end_message();
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{
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nested_output::nest _ = out.push();
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mapping_tree mtree(tm, sb.data_mapping_root_,
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mapping_tree_detail::block_traits::ref_counter(tm->get_sm()));
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check_mapping_tree(mtree, mapping_rep);
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}
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}
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return combine_errors(sb_rep.get_error(),
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dev_rep.get_error());
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}
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int check(string const &path, flags fs) {
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error_state err;
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try {
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err = metadata_check(path, fs);
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} catch (std::exception &e) {
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if (!fs.quiet)
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cerr << e.what() << endl;
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return 1;
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}
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if (fs.ignore_non_fatal_errors)
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return (err == FATAL) ? 1 : 0;
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else
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return (err == NO_ERROR) ? 0 : 1;
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}
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void usage(ostream &out, string const &cmd) {
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out << "Usage: " << cmd << " [options] {device|file}" << endl
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<< "Options:" << endl
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<< " {-q|--quiet}" << endl
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<< " {-h|--help}" << endl
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<< " {-V|--version}" << endl
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<< " {--super-block-only}" << endl
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<< " {--skip-mappings}" << endl
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<< " {--ignore-non-fatal-errors}" << endl;
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}
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}
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int main(int argc, char **argv)
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{
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int c;
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flags fs = {
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.check_device_tree = true,
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.check_mapping_tree_level1 = true,
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.check_mapping_tree_level2 = true,
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.ignore_non_fatal_errors = false,
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.quiet = false
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};
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char const shortopts[] = "qhV";
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option const longopts[] = {
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{ "quiet", no_argument, NULL, 'q'},
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{ "help", no_argument, NULL, 'h'},
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{ "version", no_argument, NULL, 'V'},
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{ "super-block-only", no_argument, NULL, 1},
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{ "skip-mappings", no_argument, NULL, 2},
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{ "ignore-non-fatal-errors", no_argument, NULL, 3},
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{ NULL, no_argument, NULL, 0 }
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};
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while ((c = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) {
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switch(c) {
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case 'h':
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usage(cout, basename(argv[0]));
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return 0;
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case 'q':
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fs.quiet = true;
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break;
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case 'V':
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cout << THIN_PROVISIONING_TOOLS_VERSION << endl;
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return 0;
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case 1:
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// super-block-only
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fs.check_device_tree = false;
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fs.check_mapping_tree_level1 = false;
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fs.check_mapping_tree_level2 = false;
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break;
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case 2:
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// skip-mappings
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fs.check_mapping_tree_level2 = false;
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break;
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case 3:
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// ignore-non-fatal-errors
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fs.ignore_non_fatal_errors = true;
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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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}
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if (argc == optind) {
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if (!fs.quiet) {
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cerr << "No input file provided." << endl;
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usage(cerr, basename(argv[0]));
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}
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exit(1);
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}
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return check(argv[optind], fs);
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}
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