[thin_check] factor out metadata_checker

This commit is contained in:
Ming-Hung Tsai 2020-02-16 16:43:31 +08:00 committed by Joe Thornber
parent d6a8c03aa2
commit c85ea5ef76
3 changed files with 332 additions and 713 deletions

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@ -16,423 +16,348 @@
// with thin-provisioning-tools. If not, see // with thin-provisioning-tools. If not, see
// <http://www.gnu.org/licenses/>. // <http://www.gnu.org/licenses/>.
#include "base/nested_output.h"
#include "persistent-data/file_utils.h" #include "persistent-data/file_utils.h"
#include "thin-provisioning/metadata.h" #include "thin-provisioning/metadata.h"
#include "thin-provisioning/metadata_checker.h" #include "thin-provisioning/metadata_checker.h"
#include "thin-provisioning/metadata_counter.h"
#include "thin-provisioning/superblock.h"
using namespace persistent_data; using namespace persistent_data;
using namespace thin_provisioning; using namespace thin_provisioning;
//---------------------------------------------------------------- //----------------------------------------------------------------
#if 0
void
metadata_damage::set_message(std::string const &message)
{
message_ = message;
}
std::string const &
metadata_damage::get_message() const
{
return message_;
}
//--------------------------------
void
super_block_corruption::visit(metadata_damage_visitor &visitor) const
{
visitor.visit(*this);
}
bool
super_block_corruption::operator ==(super_block_corruption const &rhs) const
{
return true;
}
//--------------------------------
missing_device_details::missing_device_details(range64 missing)
: missing_(missing)
{
}
void
missing_device_details::visit(metadata_damage_visitor &visitor) const
{
visitor.visit(*this);
}
bool
missing_device_details::operator ==(missing_device_details const &rhs) const
{
return missing_ == rhs.missing_;
}
//--------------------------------
missing_devices::missing_devices(range64 missing)
: missing_(missing)
{
}
void
missing_devices::visit(metadata_damage_visitor &visitor) const
{
visitor.visit(*this);
}
bool
missing_devices::operator ==(missing_devices const &rhs) const
{
return missing_ == rhs.missing_;
}
//--------------------------------
missing_mappings::missing_mappings(uint64_t dev, range64 missing)
: dev_(dev),
missing_(missing)
{
}
void
missing_mappings::visit(metadata_damage_visitor &visitor) const
{
visitor.visit(*this);
}
bool
missing_mappings::operator ==(missing_mappings const &rhs) const
{
return dev_ == rhs.dev_ && missing_ == rhs.missing_;
}
//--------------------------------
bad_metadata_ref_count::bad_metadata_ref_count(block_address b,
ref_t actual,
ref_t expected)
: b_(b),
actual_(actual),
expected_(expected)
{
}
void
bad_metadata_ref_count::visit(metadata_damage_visitor &visitor) const
{
visitor.visit(*this);
}
bool
bad_metadata_ref_count::operator ==(bad_metadata_ref_count const &rhs) const
{
return b_ == rhs.b_ && actual_ == rhs.actual_ && expected_ == rhs.expected_;
}
//--------------------------------
bad_data_ref_count::bad_data_ref_count(block_address b,
ref_t actual,
ref_t expected)
: b_(b),
actual_(actual),
expected_(expected)
{
}
void
bad_data_ref_count::visit(metadata_damage_visitor &visitor) const
{
visitor.visit(*this);
}
bool
bad_data_ref_count::operator ==(bad_data_ref_count const &rhs) const
{
return b_ == rhs.b_ && actual_ == rhs.actual_ && expected_ == rhs.expected_;
}
//--------------------------------
missing_metadata_ref_counts::missing_metadata_ref_counts(range64 missing)
: missing_(missing)
{
}
void
missing_metadata_ref_counts::visit(metadata_damage_visitor &visitor) const
{
visitor.visit(*this);
}
bool
missing_metadata_ref_counts::operator ==(missing_metadata_ref_counts const &rhs) const
{
return missing_ == rhs.missing_;
}
//--------------------------------
missing_data_ref_counts::missing_data_ref_counts(range64 missing)
: missing_(missing)
{
}
void
missing_data_ref_counts::visit(metadata_damage_visitor &visitor) const
{
visitor.visit(*this);
}
bool
missing_data_ref_counts::operator ==(missing_data_ref_counts const &rhs) const
{
return missing_ == rhs.missing_;
}
//--------------------------------
void
metadata_damage_visitor::visit(metadata_damage const &damage)
{
damage.visit(*this);
}
//--------------------------------
checker::checker(block_manager::ptr bm)
: bm_(bm)
{
}
//----------------------------------------------------------------
#if 0
namespace { namespace {
// As well as the standard btree checks, we build up a set of what class superblock_reporter : public superblock_detail::damage_visitor {
// devices having mappings defined, which can later be cross
// referenced with the details tree. A separate block_counter is
// used to later verify the data space map.
class mapping_validator : public btree<2, block_traits>::visitor {
public: public:
typedef boost::shared_ptr<mapping_validator> ptr; superblock_reporter(nested_output &out)
typedef btree_checker<2, block_traits> checker; : out_(out),
err_(NO_ERROR) {
}
mapping_validator(block_counter &metadata_counter, block_counter &data_counter) virtual void visit(superblock_detail::superblock_corruption const &d) {
: checker_(metadata_counter), out_ << "superblock is corrupt" << end_message();
data_counter_(data_counter)
{ {
nested_output::nest _ = out_.push();
out_ << d.desc_ << end_message();
}
err_ << FATAL;
} }
bool visit_internal(unsigned level, base::error_state get_error() const {
bool sub_root, return err_;
optional<uint64_t> key,
btree_detail::node_ref<uint64_traits> const &n) {
return checker_.visit_internal(level, sub_root, key, n);
}
bool visit_internal_leaf(unsigned level,
bool sub_root,
optional<uint64_t> key,
btree_detail::node_ref<uint64_traits> const &n) {
bool r = checker_.visit_internal_leaf(level, sub_root, key, n);
for (unsigned i = 0; i < n.get_nr_entries(); i++)
devices_.insert(n.key_at(i));
return r;
}
bool visit_leaf(unsigned level,
bool sub_root,
optional<uint64_t> key,
btree_detail::node_ref<block_traits> const &n) {
bool r = checker_.visit_leaf(level, sub_root, key, n);
if (r)
for (unsigned i = 0; i < n.get_nr_entries(); i++)
data_counter_.inc(n.value_at(i).block_);
return r;
}
set<uint64_t> const &get_devices() const {
return devices_;
} }
private: private:
checker checker_; nested_output &out_;
block_counter &data_counter_; error_state err_;
set<uint64_t> devices_;
}; };
struct check_count : public space_map::iterator { //--------------------------------
check_count(string const &desc, block_counter const &expected)
: bad_(false),
expected_(expected),
errors_(new error_set(desc)) {
}
virtual void operator() (block_address b, ref_t actual) { class devices_reporter : public device_tree_detail::damage_visitor {
ref_t expected = expected_.get_count(b);
if (actual != expected) {
ostringstream out;
out << b << ": was " << actual
<< ", expected " << expected;
errors_->add_child(out.str());
bad_ = true;
}
}
bool bad_;
block_counter const &expected_;
error_set::ptr errors_;
};
optional<error_set::ptr>
check_ref_counts(string const &desc, block_counter const &counts,
space_map::ptr sm) {
check_count checker(desc, counts);
sm->iterate(checker);
return checker.bad_ ? optional<error_set::ptr>(checker.errors_) : optional<error_set::ptr>();
}
class metadata_checker {
public: public:
metadata_checker(string const &dev_path) devices_reporter(nested_output &out)
: bm_(open_bm(dev_path)), : out_(out),
errors_(new error_set("Errors in metadata")) { err_(NO_ERROR) {
} }
boost::optional<error_set::ptr> check() { virtual void visit(device_tree_detail::missing_devices const &d) {
#if 1 out_ << "missing devices: " << d.keys_ << end_message();
superblock sb = read_superblock(); {
nested_output::nest _ = out_.push();
// FIXME: check version? out_ << d.desc_ << end_message();
check_mappings();
return (errors_->get_children().size() > 0) ?
optional<error_set::ptr>(errors_) :
optional<error_set::ptr>();
#else
error_set::ptr errors(new error_set("Errors in metadata"));
if (md->sb_.metadata_snap_) {
block_manager<>::ptr bm = md->tm_->get_bm();
block_address root = md->sb_.metadata_snap_;
metadata_counter.inc(root);
superblock sb;
block_manager<>::read_ref r = bm->read_lock(root);
superblock_disk const *sbd = reinterpret_cast<superblock_disk const *>(&r.data());
superblock_traits::unpack(*sbd, sb);
metadata_counter.inc(sb.data_mapping_root_);
metadata_counter.inc(sb.device_details_root_);
} }
err_ << FATAL;
set<uint64_t> const &mapped_devs = mv->get_devices();
details_validator::ptr dv(new details_validator(metadata_counter));
md->details_->visit(dv);
set<uint64_t> const &details_devs = dv->get_devices();
for (set<uint64_t>::const_iterator it = mapped_devs.begin(); it != mapped_devs.end(); ++it)
if (details_devs.count(*it) == 0) {
ostringstream out;
out << "mapping exists for device " << *it
<< ", yet there is no entry in the details tree.";
throw runtime_error(out.str());
} }
metadata_counter.inc(SUPERBLOCK_LOCATION); error_state get_error() const {
md->metadata_sm_->check(metadata_counter); return err_;
md->data_sm_->check(metadata_counter);
errors->add_child(check_ref_counts("Errors in metadata block reference counts",
metadata_counter, md->metadata_sm_));
errors->add_child(check_ref_counts("Errors in data block reference counts",
data_counter, md->data_sm_));
return (errors->get_children().size() > 0) ?
optional<error_set::ptr>(errors) :
optional<error_set::ptr>();
#endif
} }
private: private:
static block_manager<>::ptr nested_output &out_;
open_bm(string const &dev_path) { error_state err_;
block_address nr_blocks = thin_provisioning::get_nr_blocks(dev_path); };
return block_manager<>::ptr(new block_manager<>(dev_path, nr_blocks, 1, block_manager<>::READ_ONLY));
//--------------------------------
class mapping_reporter : public mapping_tree_detail::damage_visitor {
public:
mapping_reporter(nested_output &out)
: out_(out),
err_(NO_ERROR) {
} }
// FIXME: common code with metadata.cc virtual void visit(mapping_tree_detail::missing_devices const &d) {
superblock read_superblock() { out_ << "missing all mappings for devices: " << d.keys_ << end_message();
superblock sb; {
block_manager<>::read_ref r = bm_->read_lock(SUPERBLOCK_LOCATION, superblock_validator()); nested_output::nest _ = out_.push();
superblock_disk const *sbd = reinterpret_cast<superblock_disk const *>(&r.data()); out_ << d.desc_ << end_message();
superblock_traits::unpack(*sbd, sb); }
return sb; err_ << FATAL;
} }
void check_mappings() { virtual void visit(mapping_tree_detail::missing_mappings const &d) {
mapping_validator::ptr mv( out_ << "thin device " << d.thin_dev_ << " is missing mappings " << d.keys_ << end_message();
new mapping_validator(metadata_counter_, {
data_counter_)); nested_output::nest _ = out_.push();
out_ << d.desc_ << end_message();
}
err_ << FATAL;
md->mappings_->visit(mv);
} }
typedef block_manager<>::read_ref read_ref; error_state get_error() const {
typedef block_manager<>::write_ref write_ref; return err_;
typedef boost::shared_ptr<metadata> ptr; }
private:
nested_output &out_;
error_state err_;
};
//--------------------------------
error_state examine_superblock(block_manager<>::ptr bm,
nested_output &out) {
out << "examining superblock" << end_message();
nested_output::nest _ = out.push();
superblock_reporter sb_rep(out);
check_superblock(bm, sb_rep);
return sb_rep.get_error();
}
error_state examine_devices_tree_(transaction_manager::ptr tm,
superblock_detail::superblock const &sb,
nested_output &out) {
out << "examining devices tree" << end_message();
nested_output::nest _ = out.push();
devices_reporter dev_rep(out);
device_tree dtree(*tm, sb.device_details_root_,
device_tree_detail::device_details_traits::ref_counter());
check_device_tree(dtree, dev_rep);
return dev_rep.get_error();
}
error_state examine_top_level_mapping_tree_(transaction_manager::ptr tm,
superblock_detail::superblock const &sb,
nested_output &out) {
out << "examining top level of mapping tree" << end_message();
nested_output::nest _ = out.push();
mapping_reporter mapping_rep(out);
dev_tree dtree(*tm, sb.data_mapping_root_,
mapping_tree_detail::mtree_traits::ref_counter(*tm));
check_mapping_tree(dtree, mapping_rep);
return mapping_rep.get_error();
}
error_state examine_mapping_tree_(transaction_manager::ptr tm,
superblock_detail::superblock const &sb,
nested_output &out) {
out << "examining mapping tree" << end_message();
nested_output::nest _ = out.push();
mapping_reporter mapping_rep(out);
mapping_tree mtree(*tm, sb.data_mapping_root_,
mapping_tree_detail::block_traits::ref_counter(tm->get_sm()));
check_mapping_tree(mtree, mapping_rep);
return mapping_rep.get_error();
}
error_state examine_top_level_mapping_tree(transaction_manager::ptr tm,
superblock_detail::superblock const &sb,
nested_output &out) {
error_state err = examine_devices_tree_(tm, sb, out);
err << examine_top_level_mapping_tree_(tm, sb, out);
return err;
}
error_state examine_mapping_tree(transaction_manager::ptr tm,
superblock_detail::superblock const &sb,
nested_output &out) {
error_state err = examine_devices_tree_(tm, sb, out);
err << examine_mapping_tree_(tm, sb, out);
return err;
}
error_state check_space_map_counts(transaction_manager::ptr tm,
superblock_detail::superblock const &sb,
nested_output &out) {
out << "checking space map counts" << end_message();
nested_output::nest _ = out.push();
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;
persistent_space_map::ptr metadata_sm =
open_metadata_sm(*tm, static_cast<void const*>(&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;
}
void print_info(transaction_manager::ptr tm,
superblock_detail::superblock const &sb,
nested_output &out)
{
out << "TRANSACTION_ID=" << sb.trans_id_ << "\n"
<< "METADATA_FREE_BLOCKS=" << tm->get_sm()->get_nr_free()
<< end_message();
}
block_address mapping_root(superblock_detail::superblock const &sb, check_options const &opts)
{
return opts.override_mapping_root_ ? *opts.override_mapping_root_ : sb.data_mapping_root_;
}
//--------------------------------
class base_metadata_checker : public metadata_checker {
public:
base_metadata_checker(block_manager<>::ptr bm,
check_options check_opts,
output_options output_opts)
: bm_(bm),
options_(check_opts),
out_(cerr, 2),
info_out_(cout, 0) {
if (output_opts == OUTPUT_QUIET) {
out_.disable();
info_out_.disable();
}
}
error_state check() {
error_state err = NO_ERROR;
err << examine_superblock(bm_, out_);
if (err == FATAL) {
if (check_for_xml(bm_))
out_ << "This looks like XML. thin_check only checks the binary metadata format." << end_message();
return err;
}
superblock_detail::superblock sb = read_superblock(bm_);
transaction_manager::ptr tm =
open_tm(bm_, superblock_detail::SUPERBLOCK_LOCATION);
sb.data_mapping_root_ = mapping_root(sb, options_);
print_info(tm, sb, info_out_);
err << examine_data_mappings(tm, sb, options_.check_data_mappings_, out_);
// if we're checking everything, and there were no errors,
// then we should check the space maps too.
if (err != FATAL)
err << examine_metadata_space_map(tm, sb, options_.check_metadata_space_map_, out_);
return err;
}
private:
static error_state
examine_data_mappings(transaction_manager::ptr tm,
superblock_detail::superblock const &sb,
check_options::data_mapping_options option,
nested_output &out) {
error_state err = NO_ERROR;
switch (option) {
case check_options::DATA_MAPPING_LEVEL1:
err << examine_top_level_mapping_tree(tm, sb, out);
break;
case check_options::DATA_MAPPING_LEVEL2:
err << examine_mapping_tree(tm, sb, out);
break;
default:
break; // do nothing
}
return err;
}
static error_state
examine_metadata_space_map(transaction_manager::ptr tm,
superblock_detail::superblock const &sb,
check_options::metadata_space_map_options option,
nested_output &out) {
error_state err = NO_ERROR;
switch (option) {
case check_options::METADATA_SPACE_MAP_FULL:
err << check_space_map_counts(tm, sb, out);
break;
default:
break; // do nothing
}
return err;
}
block_manager<>::ptr bm_; block_manager<>::ptr bm_;
error_set::ptr errors_; check_options options_;
nested_output out_;
block_counter metadata_counter_, data_counter_; nested_output info_out_;
#if 0
tm_ptr tm_;
superblock sb_;
checked_space_map::ptr metadata_sm_;
checked_space_map::ptr data_sm_;
detail_tree::ptr details_;
dev_tree::ptr mappings_top_level_;
mapping_tree::ptr mappings_;
#endif
}; };
} }
//---------------------------------------------------------------- //----------------------------------------------------------------
boost::optional<error_set::ptr> check_options::check_options()
thin_provisioning::metadata_check(std::string const &dev_path) : check_data_mappings_(DATA_MAPPING_LEVEL2),
check_metadata_space_map_(METADATA_SPACE_MAP_FULL) {
}
void check_options::set_superblock_only() {
check_data_mappings_ = DATA_MAPPING_NONE;
check_metadata_space_map_ = METADATA_SPACE_MAP_NONE;
}
void check_options::set_skip_mappings() {
check_data_mappings_ = DATA_MAPPING_LEVEL1;
check_metadata_space_map_ = METADATA_SPACE_MAP_NONE;
}
void check_options::set_override_mapping_root(block_address b) {
override_mapping_root_ = b;
}
metadata_checker::ptr
thin_provisioning::create_base_checker(block_manager<>::ptr bm,
check_options const &check_opts,
output_options output_opts)
{ {
metadata_checker checker(dev_path); metadata_checker::ptr checker;
return checker.check(); checker = metadata_checker::ptr(new base_metadata_checker(bm, check_opts, output_opts));
return checker;
} }
//---------------------------------------------------------------- //----------------------------------------------------------------
#endif
#endif

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@ -19,142 +19,54 @@
#ifndef METADATA_CHECKER_H #ifndef METADATA_CHECKER_H
#define METADATA_CHECKER_H #define METADATA_CHECKER_H
#include "base/error_state.h"
#include "block-cache/block_cache.h"
#include "persistent-data/block.h" #include "persistent-data/block.h"
#include "persistent-data/error_set.h"
#include "persistent-data/run.h"
#include "persistent-data/space_map.h"
#include <deque>
//---------------------------------------------------------------- //----------------------------------------------------------------
namespace thin_provisioning { namespace thin_provisioning {
// FIXME: should take a block manager or transaction manager struct check_options {
void check_metadata(std::string const &path); enum data_mapping_options {
DATA_MAPPING_NONE,
DATA_MAPPING_LEVEL1,
DATA_MAPPING_LEVEL2,
};
enum metadata_space_map_options {
METADATA_SPACE_MAP_NONE,
METADATA_SPACE_MAP_FULL,
};
check_options();
void set_superblock_only();
void set_skip_mappings();
void set_override_mapping_root(bcache::block_address b);
data_mapping_options check_data_mappings_;
metadata_space_map_options check_metadata_space_map_;
boost::optional<bcache::block_address> override_mapping_root_;
};
enum output_options {
OUTPUT_NORMAL,
OUTPUT_QUIET,
};
class metadata_checker {
#if 0
// Base class for all types of metadata damage. Used in reporting.
class metadata_damage {
public: public:
typedef boost::shared_ptr<metadata_damage> ptr; typedef boost::shared_ptr<metadata_checker> ptr;
virtual ~metadata_damage() {}
virtual void visit(metadata_damage_visitor &visitor) const = 0;
void set_message(std::string const &message); virtual ~metadata_checker() {}
std::string const &get_message() const;
private: virtual base::error_state check() = 0;
std::string message_;
}; };
// FIXME: there's a mix of abstraction here, some classes represent metadata_checker::ptr
// the actual damage on disk (bad_ref_count), others represent the create_base_checker(persistent_data::block_manager<>::ptr bm,
// repercussions (missing_mapping). Need to revist, probably once check_options const &check_opts,
// we've got the reporting layer in. output_options output_opts);
class super_block_corruption : public metadata_damage {
void visit(metadata_damage_visitor &visitor) const;
bool operator ==(super_block_corruption const &rhs) const;
};
typedef base::run<uint64_t> run64;
struct missing_device_details : public metadata_damage {
missing_device_details(run64 missing);
virtual void visit(metadata_damage_visitor &visitor) const;
bool operator ==(missing_device_details const &rhs) const;
run64 missing_;
};
struct missing_devices : public metadata_damage {
missing_devices(run64 missing);
virtual void visit(metadata_damage_visitor &visitor) const;
bool operator ==(missing_devices const &rhs) const;
run64 missing_;
};
struct missing_mappings : public metadata_damage {
missing_mappings(uint64_t dev, run64 missing);
virtual void visit(metadata_damage_visitor &visitor) const;
bool operator ==(missing_mappings const &rhs) const;
uint64_t dev_;
run64 missing_;
};
struct bad_metadata_ref_count : public metadata_damage {
bad_metadata_ref_count(block_address b,
ref_t actual,
ref_t expected);
virtual void visit(metadata_damage_visitor &visitor) const;
bool operator ==(bad_metadata_ref_count const &rhs) const;
block_address b_;
ref_t actual_;
ref_t expected_;
};
struct bad_data_ref_count : public metadata_damage {
bad_data_ref_count(block_address b,
ref_t actual,
ref_t expected);
virtual void visit(metadata_damage_visitor &visitor) const;
bool operator ==(bad_data_ref_count const &rhs) const;
block_address b_;
ref_t actual_;
ref_t expected_;
};
struct missing_metadata_ref_counts : public metadata_damage {
missing_metadata_ref_counts(run64 missing);
virtual void visit(metadata_damage_visitor &visitor) const;
bool operator ==(missing_metadata_ref_counts const &rhs) const;
run64 missing_;
};
struct missing_data_ref_counts : public metadata_damage {
missing_data_ref_counts(run64 missing);
virtual void visit(metadata_damage_visitor &visitor) const;
bool operator ==(missing_data_ref_counts const &rhs) const;
run64 missing_;
};
class metadata_damage_visitor {
public:
typedef boost::shared_ptr<metadata_damage_visitor> ptr;
virtual ~metadata_damage_visitor() {}
void visit(metadata_damage const &damage);
virtual void visit(super_block_corruption const &damage) = 0;
virtual void visit(missing_device_details const &damage) = 0;
virtual void visit(missing_devices const &damage) = 0;
virtual void visit(missing_mappings const &damage) = 0;
virtual void visit(bad_metadata_ref_count const &damage) = 0;
virtual void visit(bad_data_ref_count const &damage) = 0;
virtual void visit(missing_metadata_ref_counts const &damage) = 0;
virtual void visit(missing_data_ref_counts const &damage) = 0;
};
typedef std::deque<metadata_damage::ptr> damage_list;
typedef boost::shared_ptr<damage_list> damage_list_ptr;
#endif
} }
//---------------------------------------------------------------- //----------------------------------------------------------------

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@ -28,258 +28,34 @@
#include "base/application.h" #include "base/application.h"
#include "base/error_state.h" #include "base/error_state.h"
#include "base/file_utils.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 "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" #include "thin-provisioning/commands.h"
#include "thin-provisioning/metadata_checker.h"
#include "thin-provisioning/superblock.h"
using namespace base; using namespace base;
using namespace std; using namespace std;
using namespace persistent_data;
using namespace thin_provisioning; using namespace thin_provisioning;
//---------------------------------------------------------------- //----------------------------------------------------------------
namespace { 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 { struct flags {
flags() flags()
: check_device_tree(true), : ignore_non_fatal_errors(false),
check_mapping_tree_level1(true),
check_mapping_tree_level2(true),
ignore_non_fatal_errors(false),
quiet(false), quiet(false),
clear_needs_check_flag_on_success(false) { clear_needs_check_flag_on_success(false) {
} }
bool check_device_tree; check_options check_opts;
bool check_mapping_tree_level1;
bool check_mapping_tree_level2;
bool ignore_non_fatal_errors; bool ignore_non_fatal_errors;
bool quiet; bool quiet;
boost::optional<block_address> override_mapping_root;
bool clear_needs_check_flag_on_success; 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) { void clear_needs_check(string const &path) {
block_manager<>::ptr bm = open_bm(path, block_manager<>::READ_WRITE); block_manager<>::ptr bm = open_bm(path, block_manager<>::READ_WRITE);
@ -291,11 +67,19 @@ namespace {
// Returns 0 on success, 1 on failure (this gets returned directly // Returns 0 on success, 1 on failure (this gets returned directly
// by main). // by main).
int check(string const &path, flags fs) { int check(string const &path, flags fs) {
error_state err;
bool success = false; bool success = false;
try { try {
err = metadata_check(path, fs); 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);
output_options output_opts = !fs.quiet ? OUTPUT_NORMAL : OUTPUT_QUIET;
metadata_checker::ptr checker = create_base_checker(bm, fs.check_opts, output_opts);
error_state err = checker->check();
if (fs.ignore_non_fatal_errors) if (fs.ignore_non_fatal_errors)
success = (err == FATAL) ? false : true; success = (err == FATAL) ? false : true;
@ -373,14 +157,12 @@ thin_check_cmd::run(int argc, char **argv)
case 1: case 1:
// super-block-only // super-block-only
fs.check_device_tree = false; fs.check_opts.set_superblock_only();
fs.check_mapping_tree_level1 = false;
fs.check_mapping_tree_level2 = false;
break; break;
case 2: case 2:
// skip-mappings // skip-mappings
fs.check_mapping_tree_level2 = false; fs.check_opts.set_skip_mappings();
break; break;
case 3: case 3:
@ -395,7 +177,7 @@ thin_check_cmd::run(int argc, char **argv)
case 5: case 5:
// override-mapping-root // override-mapping-root
fs.override_mapping_root = boost::lexical_cast<uint64_t>(optarg); fs.check_opts.set_override_mapping_root(boost::lexical_cast<uint64_t>(optarg));
break; break;
default: default: