[thin_check] factor out metadata_checker
This commit is contained in:
Ming-Hung Tsai
committed by
Joe Thornber
Joe Thornber
parent
d6a8c03aa2
commit
c85ea5ef76
@@ -16,423 +16,348 @@
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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 "base/nested_output.h"
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#include "persistent-data/file_utils.h"
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#include "thin-provisioning/metadata.h"
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#include "thin-provisioning/metadata_checker.h"
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#include "thin-provisioning/metadata_counter.h"
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#include "thin-provisioning/superblock.h"
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using namespace persistent_data;
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using namespace thin_provisioning;
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//----------------------------------------------------------------
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#if 0
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void
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metadata_damage::set_message(std::string const &message)
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{
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message_ = message;
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}
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std::string const &
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metadata_damage::get_message() const
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{
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return message_;
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}
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//--------------------------------
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void
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super_block_corruption::visit(metadata_damage_visitor &visitor) const
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{
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visitor.visit(*this);
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}
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bool
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super_block_corruption::operator ==(super_block_corruption const &rhs) const
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{
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return true;
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}
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//--------------------------------
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missing_device_details::missing_device_details(range64 missing)
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: missing_(missing)
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{
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}
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void
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missing_device_details::visit(metadata_damage_visitor &visitor) const
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{
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visitor.visit(*this);
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}
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bool
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missing_device_details::operator ==(missing_device_details const &rhs) const
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{
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return missing_ == rhs.missing_;
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}
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//--------------------------------
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missing_devices::missing_devices(range64 missing)
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: missing_(missing)
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{
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}
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void
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missing_devices::visit(metadata_damage_visitor &visitor) const
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{
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visitor.visit(*this);
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}
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bool
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missing_devices::operator ==(missing_devices const &rhs) const
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{
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return missing_ == rhs.missing_;
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}
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//--------------------------------
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missing_mappings::missing_mappings(uint64_t dev, range64 missing)
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: dev_(dev),
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missing_(missing)
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{
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}
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void
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missing_mappings::visit(metadata_damage_visitor &visitor) const
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{
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visitor.visit(*this);
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}
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bool
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missing_mappings::operator ==(missing_mappings const &rhs) const
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{
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return dev_ == rhs.dev_ && missing_ == rhs.missing_;
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}
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//--------------------------------
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bad_metadata_ref_count::bad_metadata_ref_count(block_address b,
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ref_t actual,
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ref_t expected)
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: b_(b),
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actual_(actual),
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expected_(expected)
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{
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}
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void
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bad_metadata_ref_count::visit(metadata_damage_visitor &visitor) const
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{
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visitor.visit(*this);
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}
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bool
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bad_metadata_ref_count::operator ==(bad_metadata_ref_count const &rhs) const
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{
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return b_ == rhs.b_ && actual_ == rhs.actual_ && expected_ == rhs.expected_;
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}
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//--------------------------------
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bad_data_ref_count::bad_data_ref_count(block_address b,
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ref_t actual,
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ref_t expected)
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: b_(b),
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actual_(actual),
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expected_(expected)
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{
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}
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void
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bad_data_ref_count::visit(metadata_damage_visitor &visitor) const
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{
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visitor.visit(*this);
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}
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bool
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bad_data_ref_count::operator ==(bad_data_ref_count const &rhs) const
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{
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return b_ == rhs.b_ && actual_ == rhs.actual_ && expected_ == rhs.expected_;
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}
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//--------------------------------
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missing_metadata_ref_counts::missing_metadata_ref_counts(range64 missing)
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: missing_(missing)
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{
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}
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void
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missing_metadata_ref_counts::visit(metadata_damage_visitor &visitor) const
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{
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visitor.visit(*this);
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}
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bool
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missing_metadata_ref_counts::operator ==(missing_metadata_ref_counts const &rhs) const
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{
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return missing_ == rhs.missing_;
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}
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//--------------------------------
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missing_data_ref_counts::missing_data_ref_counts(range64 missing)
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: missing_(missing)
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{
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}
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void
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missing_data_ref_counts::visit(metadata_damage_visitor &visitor) const
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{
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visitor.visit(*this);
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}
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bool
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missing_data_ref_counts::operator ==(missing_data_ref_counts const &rhs) const
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{
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return missing_ == rhs.missing_;
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}
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//--------------------------------
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void
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metadata_damage_visitor::visit(metadata_damage const &damage)
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{
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damage.visit(*this);
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}
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//--------------------------------
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checker::checker(block_manager::ptr bm)
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: bm_(bm)
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{
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}
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//----------------------------------------------------------------
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#if 0
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namespace {
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// As well as the standard btree checks, we build up a set of what
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// devices having mappings defined, which can later be cross
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// referenced with the details tree. A separate block_counter is
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// used to later verify the data space map.
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class mapping_validator : public btree<2, block_traits>::visitor {
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class superblock_reporter : public superblock_detail::damage_visitor {
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public:
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typedef boost::shared_ptr<mapping_validator> ptr;
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typedef btree_checker<2, block_traits> checker;
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mapping_validator(block_counter &metadata_counter, block_counter &data_counter)
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: checker_(metadata_counter),
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data_counter_(data_counter)
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{
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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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bool visit_internal(unsigned level,
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bool sub_root,
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optional<uint64_t> key,
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btree_detail::node_ref<uint64_traits> const &n) {
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return checker_.visit_internal(level, sub_root, key, n);
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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_ << FATAL;
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}
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bool visit_internal_leaf(unsigned level,
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bool sub_root,
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optional<uint64_t> key,
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btree_detail::node_ref<uint64_traits> const &n) {
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bool r = checker_.visit_internal_leaf(level, sub_root, key, n);
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for (unsigned i = 0; i < n.get_nr_entries(); i++)
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devices_.insert(n.key_at(i));
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return r;
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}
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bool visit_leaf(unsigned level,
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bool sub_root,
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optional<uint64_t> key,
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btree_detail::node_ref<block_traits> const &n) {
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bool r = checker_.visit_leaf(level, sub_root, key, n);
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if (r)
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for (unsigned i = 0; i < n.get_nr_entries(); i++)
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data_counter_.inc(n.value_at(i).block_);
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return r;
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}
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set<uint64_t> const &get_devices() const {
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return devices_;
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base::error_state get_error() const {
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return err_;
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}
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private:
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checker checker_;
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block_counter &data_counter_;
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set<uint64_t> devices_;
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nested_output &out_;
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error_state err_;
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};
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struct check_count : public space_map::iterator {
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check_count(string const &desc, block_counter const &expected)
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: bad_(false),
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expected_(expected),
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errors_(new error_set(desc)) {
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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 operator() (block_address b, ref_t actual) {
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ref_t expected = expected_.get_count(b);
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if (actual != expected) {
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ostringstream out;
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out << b << ": was " << actual
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<< ", expected " << expected;
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errors_->add_child(out.str());
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bad_ = true;
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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_ << FATAL;
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}
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bool bad_;
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block_counter const &expected_;
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error_set::ptr errors_;
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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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optional<error_set::ptr>
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check_ref_counts(string const &desc, block_counter const &counts,
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space_map::ptr sm) {
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//--------------------------------
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check_count checker(desc, counts);
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sm->iterate(checker);
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return checker.bad_ ? optional<error_set::ptr>(checker.errors_) : optional<error_set::ptr>();
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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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err_(NO_ERROR) {
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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_ << 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_ << 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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error_state examine_superblock(block_manager<>::ptr bm,
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nested_output &out) {
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out << "examining superblock" << end_message();
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nested_output::nest _ = out.push();
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superblock_reporter sb_rep(out);
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check_superblock(bm, sb_rep);
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return sb_rep.get_error();
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}
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class metadata_checker {
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public:
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metadata_checker(string const &dev_path)
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: bm_(open_bm(dev_path)),
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errors_(new error_set("Errors in metadata")) {
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error_state examine_devices_tree_(transaction_manager::ptr tm,
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superblock_detail::superblock const &sb,
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nested_output &out) {
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out << "examining devices tree" << end_message();
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nested_output::nest _ = out.push();
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devices_reporter dev_rep(out);
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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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return dev_rep.get_error();
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}
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error_state examine_top_level_mapping_tree_(transaction_manager::ptr tm,
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superblock_detail::superblock const &sb,
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nested_output &out) {
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out << "examining top level of mapping tree" << end_message();
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nested_output::nest _ = out.push();
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mapping_reporter mapping_rep(out);
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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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return mapping_rep.get_error();
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}
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error_state examine_mapping_tree_(transaction_manager::ptr tm,
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superblock_detail::superblock const &sb,
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nested_output &out) {
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out << "examining mapping tree" << end_message();
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nested_output::nest _ = out.push();
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mapping_reporter mapping_rep(out);
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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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return mapping_rep.get_error();
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}
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error_state examine_top_level_mapping_tree(transaction_manager::ptr tm,
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superblock_detail::superblock const &sb,
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nested_output &out) {
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error_state err = examine_devices_tree_(tm, sb, out);
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err << examine_top_level_mapping_tree_(tm, sb, out);
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return err;
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}
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error_state examine_mapping_tree(transaction_manager::ptr tm,
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superblock_detail::superblock const &sb,
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nested_output &out) {
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error_state err = examine_devices_tree_(tm, sb, out);
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err << examine_mapping_tree_(tm, sb, out);
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return err;
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}
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error_state check_space_map_counts(transaction_manager::ptr tm,
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superblock_detail::superblock const &sb,
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nested_output &out) {
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out << "checking space map counts" << end_message();
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nested_output::nest _ = out.push();
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block_counter bc;
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count_metadata(tm, sb, bc);
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// Finally we need to check the metadata space map agrees
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// with the counts we've just calculated.
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error_state err = NO_ERROR;
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persistent_space_map::ptr metadata_sm =
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open_metadata_sm(*tm, static_cast<void const*>(&sb.metadata_space_map_root_));
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for (unsigned b = 0; b < metadata_sm->get_nr_blocks(); b++) {
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ref_t c_actual = metadata_sm->get_count(b);
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ref_t c_expected = bc.get_count(b);
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if (c_actual != c_expected) {
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out << "metadata reference counts differ for block " << b
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<< ", expected " << c_expected
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<< ", but got " << c_actual
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<< end_message();
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err << (c_actual > c_expected ? NON_FATAL : FATAL);
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}
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}
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boost::optional<error_set::ptr> check() {
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#if 1
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superblock sb = read_superblock();
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return err;
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}
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// FIXME: check version?
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void print_info(transaction_manager::ptr tm,
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superblock_detail::superblock const &sb,
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nested_output &out)
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{
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out << "TRANSACTION_ID=" << sb.trans_id_ << "\n"
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<< "METADATA_FREE_BLOCKS=" << tm->get_sm()->get_nr_free()
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<< end_message();
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}
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check_mappings();
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block_address mapping_root(superblock_detail::superblock const &sb, check_options const &opts)
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{
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return opts.override_mapping_root_ ? *opts.override_mapping_root_ : sb.data_mapping_root_;
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}
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return (errors_->get_children().size() > 0) ?
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optional<error_set::ptr>(errors_) :
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optional<error_set::ptr>();
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#else
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error_set::ptr errors(new error_set("Errors in metadata"));
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//--------------------------------
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class base_metadata_checker : public metadata_checker {
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public:
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base_metadata_checker(block_manager<>::ptr bm,
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check_options check_opts,
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output_options output_opts)
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: bm_(bm),
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options_(check_opts),
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out_(cerr, 2),
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info_out_(cout, 0) {
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if (md->sb_.metadata_snap_) {
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block_manager<>::ptr bm = md->tm_->get_bm();
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if (output_opts == OUTPUT_QUIET) {
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out_.disable();
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info_out_.disable();
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}
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}
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error_state check() {
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error_state err = NO_ERROR;
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block_address root = md->sb_.metadata_snap_;
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err << examine_superblock(bm_, out_);
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metadata_counter.inc(root);
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superblock sb;
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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_);
|
||||
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_);
|
||||
|
||||
set<uint64_t> const &mapped_devs = mv->get_devices();
|
||||
details_validator::ptr dv(new details_validator(metadata_counter));
|
||||
md->details_->visit(dv);
|
||||
print_info(tm, sb, info_out_);
|
||||
|
||||
set<uint64_t> const &details_devs = dv->get_devices();
|
||||
err << examine_data_mappings(tm, sb, options_.check_data_mappings_, out_);
|
||||
|
||||
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());
|
||||
}
|
||||
// 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_);
|
||||
|
||||
metadata_counter.inc(SUPERBLOCK_LOCATION);
|
||||
md->metadata_sm_->check(metadata_counter);
|
||||
|
||||
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
|
||||
return err;
|
||||
}
|
||||
|
||||
private:
|
||||
static block_manager<>::ptr
|
||||
open_bm(string const &dev_path) {
|
||||
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));
|
||||
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;
|
||||
}
|
||||
|
||||
// FIXME: common code with metadata.cc
|
||||
superblock read_superblock() {
|
||||
superblock sb;
|
||||
block_manager<>::read_ref r = bm_->read_lock(SUPERBLOCK_LOCATION, superblock_validator());
|
||||
superblock_disk const *sbd = reinterpret_cast<superblock_disk const *>(&r.data());
|
||||
superblock_traits::unpack(*sbd, sb);
|
||||
return sb;
|
||||
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;
|
||||
}
|
||||
|
||||
void check_mappings() {
|
||||
mapping_validator::ptr mv(
|
||||
new mapping_validator(metadata_counter_,
|
||||
data_counter_));
|
||||
|
||||
|
||||
|
||||
md->mappings_->visit(mv);
|
||||
}
|
||||
|
||||
typedef block_manager<>::read_ref read_ref;
|
||||
typedef block_manager<>::write_ref write_ref;
|
||||
typedef boost::shared_ptr<metadata> ptr;
|
||||
|
||||
block_manager<>::ptr bm_;
|
||||
error_set::ptr errors_;
|
||||
|
||||
block_counter metadata_counter_, data_counter_;
|
||||
|
||||
|
||||
#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
|
||||
check_options options_;
|
||||
nested_output out_;
|
||||
nested_output info_out_;
|
||||
};
|
||||
}
|
||||
|
||||
|
||||
//----------------------------------------------------------------
|
||||
|
||||
boost::optional<error_set::ptr>
|
||||
thin_provisioning::metadata_check(std::string const &dev_path)
|
||||
check_options::check_options()
|
||||
: 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);
|
||||
return checker.check();
|
||||
metadata_checker::ptr checker;
|
||||
checker = metadata_checker::ptr(new base_metadata_checker(bm, check_opts, output_opts));
|
||||
return checker;
|
||||
}
|
||||
|
||||
//----------------------------------------------------------------
|
||||
#endif
|
||||
#endif
|
||||
|
||||
Reference in New Issue
Block a user