718 lines
15 KiB
C++
718 lines
15 KiB
C++
#include <boost/lexical_cast.hpp>
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#include <boost/optional.hpp>
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#include <getopt.h>
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#include <iostream>
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#include <libgen.h>
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#include "version.h"
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#include "base/indented_stream.h"
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#include "persistent-data/data-structures/btree_damage_visitor.h"
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#include "persistent-data/run.h"
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#include "persistent-data/space-maps/core.h"
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#include "persistent-data/space-maps/disk.h"
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#include "persistent-data/file_utils.h"
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#include "thin-provisioning/superblock.h"
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#include "thin-provisioning/mapping_tree.h"
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#include "thin-provisioning/metadata.h"
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#include "thin-provisioning/commands.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 local {
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class application {
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public:
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application(string const &cmd)
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: cmd_(cmd) {
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}
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void usage(ostream &out) {
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out << "Usage: " << cmd_ << " [options] <device or file>\n"
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<< "Options:\n"
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<< " {--thin1, --snap1}\n"
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<< " {--thin2, --snap2}\n"
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<< " {-m, --metadata-snap} [block#]\n"
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<< " {--verbose}\n"
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<< " {-h|--help}\n"
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<< " {-V|--version}" << endl;
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}
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void die(string const &msg) {
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cerr << msg << endl;
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usage(cerr);
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exit(1);
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}
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uint64_t parse_int(string const &str, string const &desc) {
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try {
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return boost::lexical_cast<uint64_t>(str);
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} catch (...) {
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ostringstream out;
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out << "Couldn't parse " << desc << ": '" << str << "'";
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die(out.str());
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}
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return 0; // never get here
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}
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private:
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string cmd_;
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};
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struct flags {
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flags()
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: verbose(false),
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use_metadata_snap(false) {
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}
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bool verbose;
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bool use_metadata_snap;
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boost::optional<string> dev;
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boost::optional<uint64_t> metadata_snap;
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boost::optional<uint64_t> snap1;
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boost::optional<uint64_t> snap2;
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};
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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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struct mapping {
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mapping()
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: vbegin_(0),
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dbegin_(0),
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len_(0) {
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}
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mapping(uint64_t vbegin, uint64_t dbegin, uint64_t len)
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: vbegin_(vbegin),
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dbegin_(dbegin),
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len_(len) {
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}
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uint64_t vbegin_, dbegin_, len_;
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};
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ostream &operator <<(ostream &out, mapping const &m) {
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out << "mapping[vbegin = " << m.vbegin_
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<< ", dbegin = " << m.dbegin_
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<< ", len = " << m.len_ << "]";
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return out;
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}
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//--------------------------------
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template <typename Container>
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class mapping_stream {
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public:
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mapping_stream(Container const &c)
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: it_(c.begin()),
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end_(c.end()) {
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m_ = *it_;
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}
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mapping const &get_mapping() const {
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return m_;
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}
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bool more_mappings() const {
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return it_ != end_;
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}
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void consume(uint64_t delta) {
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if (it_ == end_)
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throw runtime_error("end of stream already reached");
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if (delta > m_.len_)
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throw runtime_error("delta too long");
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if (delta == m_.len_) {
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++it_;
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m_ = *it_;
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} else {
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m_.vbegin_ += delta;
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m_.dbegin_ += delta;
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m_.len_ -= delta;
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}
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}
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private:
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typename Container::const_iterator it_;
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typename Container::const_iterator end_;
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mapping m_;
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};
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//--------------------------------
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typedef std::deque<mapping> mapping_deque;
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// Builds up an in core rep of the mappings for a device.
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class mapping_recorder {
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public:
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mapping_recorder() {
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no_range();
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}
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void visit(btree_path const &path, mapping_tree_detail::block_time const &bt) {
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record(path[0], bt.block_);
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}
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void complete() {
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if (range_in_progress()) {
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push_range();
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no_range();
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}
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}
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mapping_deque const &get_mappings() const {
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return mappings_;
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}
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private:
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void no_range() {
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obegin_ = oend_ = 0;
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dbegin_ = dend_ = 0;
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}
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void inc_range() {
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oend_++;
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dend_++;
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}
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void begin_range(uint64_t oblock, uint64_t dblock) {
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obegin_ = oend_ = oblock;
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dbegin_ = dend_ = dblock;
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inc_range();
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}
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bool range_in_progress() {
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return oend_ != obegin_;
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}
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bool continues_range(uint64_t oblock, uint64_t dblock) {
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return (oblock == oend_) && (dblock == dend_);
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}
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void push_range() {
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mapping m(obegin_, dbegin_, oend_ - obegin_);
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mappings_.push_back(m);
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}
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void record(uint64_t oblock, uint64_t dblock) {
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if (!range_in_progress())
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begin_range(oblock, dblock);
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else if (!continues_range(oblock, dblock)) {
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push_range();
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begin_range(oblock, dblock);
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} else
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inc_range();
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}
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uint64_t obegin_, oend_;
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uint64_t dbegin_, dend_;
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mapping_deque mappings_;
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};
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//--------------------------------
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class damage_visitor {
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public:
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virtual void visit(btree_path const &path, btree_detail::damage const &d) {
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throw std::runtime_error("damage in mapping tree, please run thin_check");
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}
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};
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//--------------------------------
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class diff_emitter {
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public:
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diff_emitter(indented_stream &out)
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: out_(out) {
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}
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virtual void left_only(uint64_t vbegin, uint64_t dbegin, uint64_t len) = 0;
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virtual void right_only(uint64_t vbegin, uint64_t dbegin, uint64_t len) = 0;
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virtual void blocks_differ(uint64_t vbegin, uint64_t left_dbegin, uint64_t right_dbegin, uint64_t len) = 0;
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virtual void blocks_same(uint64_t vbegin, uint64_t dbegin, uint64_t len) = 0;
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virtual void complete() = 0;
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protected:
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void indent() {
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out_.indent();
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}
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indented_stream &out() {
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return out_;
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}
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private:
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indented_stream &out_;
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};
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class simple_emitter : public diff_emitter {
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public:
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simple_emitter(indented_stream &out)
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: diff_emitter(out) {
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}
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void left_only(uint64_t vbegin, uint64_t dbegin, uint64_t len) {
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add_range(LEFT_ONLY, vbegin, len);
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}
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void right_only(uint64_t vbegin, uint64_t dbegin, uint64_t len) {
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add_range(RIGHT_ONLY, vbegin, len);
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}
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void blocks_differ(uint64_t vbegin, uint64_t left_dbegin, uint64_t right_dbegin, uint64_t len) {
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add_range(DIFFER, vbegin, len);
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}
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void blocks_same(uint64_t vbegin, uint64_t dbegin, uint64_t len) {
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add_range(SAME, vbegin, len);
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}
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void complete() {
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if (current_type_)
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emit_range();
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}
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private:
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enum block_type {
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LEFT_ONLY,
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RIGHT_ONLY,
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DIFFER,
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SAME
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};
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void add_range(block_type t, uint64_t vbegin, uint64_t len) {
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if (current_type_ && *current_type_ == t && vbegin == vend_) {
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vend_ += len;
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return;
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}
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emit_range();
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current_type_ = t;
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vbegin_ = vbegin;
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vend_ = vbegin_ + len;
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}
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void emit_range() {
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if (!current_type_)
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return;
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indent();
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switch (*current_type_) {
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case LEFT_ONLY:
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out() << "<left_only";
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break;
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case RIGHT_ONLY:
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out() << "<right_only";
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break;
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case DIFFER:
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out() << "<different";
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break;
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case SAME:
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out() << "<same";
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break;
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}
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out() << " begin=\"" << vbegin_ << "\""
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<< " length=\"" << vend_ - vbegin_ << "\"/>\n";
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}
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boost::optional<block_type> current_type_;
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uint64_t vbegin_, vend_;
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};
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class verbose_emitter : public diff_emitter {
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public:
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verbose_emitter(indented_stream &out)
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: diff_emitter(out) {
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}
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void left_only(uint64_t vbegin, uint64_t dbegin, uint64_t len) {
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begin_block(LEFT_ONLY);
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indent();
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out() << "<range begin=\"" << vbegin << "\""
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<< " data_begin=\"" << dbegin << "\""
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<< " length=\"" << len << "\"/>\n";
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}
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void right_only(uint64_t vbegin, uint64_t dbegin, uint64_t len) {
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begin_block(RIGHT_ONLY);
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indent();
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out() << "<range begin=\"" << vbegin << "\""
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<< " data_begin=\"" << dbegin << "\""
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<< " length=\"" << len << "\"/>\n";
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}
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void blocks_differ(uint64_t vbegin, uint64_t left_dbegin, uint64_t right_dbegin, uint64_t len) {
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begin_block(DIFFER);
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indent();
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out() << "<range begin=\"" << vbegin << "\""
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<< " left_data_begin=\"" << left_dbegin << "\""
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<< " right_data_begin=\"" << right_dbegin << "\""
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<< " length=\"" << len << "\"/>\n";
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}
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void blocks_same(uint64_t vbegin, uint64_t dbegin, uint64_t len) {
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begin_block(SAME);
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indent();
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out() << "<range begin=\"" << vbegin << "\""
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<< " data_begin=\"" << dbegin << "\""
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<< " length=\"" << len << "\"/>\n";
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}
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void complete() {
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if (current_type_)
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close(*current_type_);
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}
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private:
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enum block_type {
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LEFT_ONLY,
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RIGHT_ONLY,
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DIFFER,
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SAME
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};
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void begin_block(block_type t) {
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if (!current_type_) {
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current_type_ = t;
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open(t);
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} else if (*current_type_ != t) {
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close(*current_type_);
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current_type_ = t;
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open(t);
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}
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}
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void open(block_type t) {
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indent();
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switch (t) {
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case LEFT_ONLY:
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out() << "<left_only>\n";
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break;
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case RIGHT_ONLY:
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out() << "<right_only>\n";
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break;
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case DIFFER:
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out() << "<different>\n";
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break;
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case SAME:
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out() << "<same>\n";
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break;
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}
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out().inc();
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}
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void close(block_type t) {
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out().dec();
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indent();
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switch (t) {
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case LEFT_ONLY:
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out() << "</left_only>\n";
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break;
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case RIGHT_ONLY:
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out() << "</right_only>\n";
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break;
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case DIFFER:
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out() << "</different>\n";
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break;
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case SAME:
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out() << "</same>\n";
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break;
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}
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}
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boost::optional<block_type> current_type_;
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};
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//----------------------------------------------------------------
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void dump_diff(mapping_deque const &left,
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mapping_deque const &right,
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diff_emitter &e) {
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// We iterate through both sets of mappings in parallel
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// noting any differences.
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mapping_stream<mapping_deque> ls{left};
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mapping_stream<mapping_deque> rs{right};
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while (ls.more_mappings() && rs.more_mappings()) {
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auto &lm = ls.get_mapping();
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auto &rm = rs.get_mapping();
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if (lm.vbegin_ < rm.vbegin_) {
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auto delta = min<uint64_t>(lm.len_, rm.vbegin_ - lm.vbegin_);
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e.left_only(lm.vbegin_, lm.dbegin_, delta);
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ls.consume(delta);
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} else if (lm.vbegin_ > rm.vbegin_) {
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auto delta = min<uint64_t>(rm.len_, lm.vbegin_ - rm.vbegin_);
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e.right_only(rm.vbegin_, rm.dbegin_, delta);
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rs.consume(delta);
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} else if (lm.dbegin_ != rm.dbegin_) {
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auto delta = min<uint64_t>(lm.len_, rm.len_);
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e.blocks_differ(lm.vbegin_, lm.dbegin_, rm.dbegin_, delta);
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ls.consume(delta);
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rs.consume(delta);
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} else {
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auto delta = min<uint64_t>(lm.len_, rm.len_);
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e.blocks_same(lm.vbegin_, lm.dbegin_, delta);
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ls.consume(delta);
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rs.consume(delta);
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}
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}
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while (ls.more_mappings()) {
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auto &lm = ls.get_mapping();
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e.left_only(lm.vbegin_, lm.dbegin_, lm.len_);
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ls.consume(lm.len_);
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}
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while (rs.more_mappings()) {
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auto &rm = rs.get_mapping();
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e.right_only(rm.vbegin_, rm.dbegin_, rm.len_);
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rs.consume(rm.len_);
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}
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e.complete();
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}
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// FIXME: duplication with xml_format
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void begin_superblock(indented_stream &out,
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string const &uuid,
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uint64_t time,
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uint64_t trans_id,
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uint32_t data_block_size,
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uint64_t nr_data_blocks,
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boost::optional<uint64_t> metadata_snap) {
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out.indent();
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out << "<superblock uuid=\"" << uuid << "\""
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<< " time=\"" << time << "\""
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<< " transaction=\"" << trans_id << "\""
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<< " data_block_size=\"" << data_block_size << "\""
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<< " nr_data_blocks=\"" << nr_data_blocks;
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if (metadata_snap)
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out << "\" metadata_snap=\"" << *metadata_snap;
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out << "\">\n";
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out.inc();
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}
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void end_superblock(indented_stream &out) {
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out.dec();
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out.indent();
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out << "</superblock>\n";
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}
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void begin_diff(indented_stream &out, uint64_t snap1, uint64_t snap2) {
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out.indent();
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out << "<diff left=\"" << snap1 << "\" right=\"" << snap2 << "\">\n";
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out.inc();
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}
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void end_diff(indented_stream &out) {
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out.dec();
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out.indent();
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out << "</diff>\n";
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}
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void delta_(application &app, flags const &fs) {
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mapping_recorder mr1;
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mapping_recorder mr2;
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damage_visitor damage_v;
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superblock_detail::superblock sb;
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block_address nr_data_blocks = 0ull;
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{
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block_manager<>::ptr bm = open_bm(*fs.dev, block_manager<>::READ_ONLY, !fs.use_metadata_snap);
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metadata::ptr md(fs.use_metadata_snap ? new metadata(bm, fs.metadata_snap) : new metadata(bm));
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sb = md->sb_;
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dev_tree::key k = {*fs.snap1};
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boost::optional<uint64_t> snap1_root = md->mappings_top_level_->lookup(k);
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if (!snap1_root) {
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ostringstream out;
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out << "Unable to find mapping tree for snap1 (" << *fs.snap1 << ")";
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app.die(out.str());
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}
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single_mapping_tree snap1(*md->tm_, *snap1_root,
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mapping_tree_detail::block_traits::ref_counter(md->tm_->get_sm()));
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k[0] = *fs.snap2;
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boost::optional<uint64_t> snap2_root = md->mappings_top_level_->lookup(k);
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if (!snap2_root) {
|
|
ostringstream out;
|
|
out << "Unable to find mapping tree for snap2 (" << *fs.snap2 << ")";
|
|
app.die(out.str());
|
|
}
|
|
|
|
single_mapping_tree snap2(*md->tm_, *snap2_root,
|
|
mapping_tree_detail::block_traits::ref_counter(md->tm_->get_sm()));
|
|
btree_visit_values(snap1, mr1, damage_v);
|
|
mr1.complete();
|
|
|
|
btree_visit_values(snap2, mr2, damage_v);
|
|
mr2.complete();
|
|
|
|
if (md->data_sm_)
|
|
nr_data_blocks = md->data_sm_->get_nr_blocks();
|
|
}
|
|
|
|
indented_stream is(cout);
|
|
begin_superblock(is, "", sb.time_,
|
|
sb.trans_id_,
|
|
sb.data_block_size_,
|
|
nr_data_blocks,
|
|
sb.metadata_snap_ ?
|
|
boost::optional<block_address>(sb.metadata_snap_) :
|
|
boost::optional<block_address>());
|
|
begin_diff(is, *fs.snap1, *fs.snap2);
|
|
|
|
if (fs.verbose) {
|
|
verbose_emitter e(is);
|
|
dump_diff(mr1.get_mappings(), mr2.get_mappings(), e);
|
|
} else {
|
|
simple_emitter e(is);
|
|
dump_diff(mr1.get_mappings(), mr2.get_mappings(), e);
|
|
}
|
|
|
|
end_diff(is);
|
|
end_superblock(is);
|
|
}
|
|
|
|
int delta(application &app, flags const &fs) {
|
|
try {
|
|
delta_(app, fs);
|
|
} catch (exception const &e) {
|
|
app.die(e.what());
|
|
return 1; // never get here
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------
|
|
|
|
// FIXME: add metadata snap switch
|
|
|
|
thin_delta_cmd::thin_delta_cmd()
|
|
: command("thin_delta")
|
|
{
|
|
}
|
|
|
|
void
|
|
thin_delta_cmd::usage(std::ostream &out) const
|
|
{
|
|
// FIXME: finish
|
|
}
|
|
|
|
int
|
|
thin_delta_cmd::run(int argc, char **argv)
|
|
{
|
|
using namespace local;
|
|
|
|
int c;
|
|
flags fs;
|
|
local::application app(basename(argv[0]));
|
|
|
|
char const shortopts[] = "hVm::";
|
|
option const longopts[] = {
|
|
{ "help", no_argument, NULL, 'h' },
|
|
{ "version", no_argument, NULL, 'V' },
|
|
{ "thin1", required_argument, NULL, 1 },
|
|
{ "snap1", required_argument, NULL, 1 },
|
|
{ "thin2", required_argument, NULL, 2 },
|
|
{ "snap2", required_argument, NULL, 2 },
|
|
{ "metadata-snap", optional_argument, NULL, 'm' },
|
|
{ "verbose", no_argument, NULL, 4 },
|
|
{ NULL, no_argument, NULL, 0 }
|
|
};
|
|
|
|
while ((c = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) {
|
|
switch (c) {
|
|
case 'h':
|
|
app.usage(cout);
|
|
return 0;
|
|
|
|
case 'V':
|
|
cout << THIN_PROVISIONING_TOOLS_VERSION << endl;
|
|
return 0;
|
|
|
|
case 1:
|
|
fs.snap1 = app.parse_int(optarg, "thin id 1");
|
|
break;
|
|
|
|
case 2:
|
|
fs.snap2 = app.parse_int(optarg, "thin id 2");
|
|
break;
|
|
|
|
case 'm':
|
|
fs.use_metadata_snap = true;
|
|
if (optarg)
|
|
fs.metadata_snap = app.parse_int(optarg, "metadata snapshot block");
|
|
break;
|
|
|
|
case 4:
|
|
fs.verbose = true;
|
|
break;
|
|
|
|
default:
|
|
app.usage(cerr);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
if (argc == optind)
|
|
app.die("No input device provided.");
|
|
else
|
|
fs.dev = argv[optind];
|
|
|
|
if (!fs.snap1)
|
|
app.die("--snap1 not specified.");
|
|
|
|
if (!fs.snap2)
|
|
app.die("--snap2 not specified.");
|
|
|
|
return delta(app, fs);
|
|
}
|
|
|
|
//----------------------------------------------------------------
|