[thin_ls] First code drop.
Output still needs formatting. More testing needed in dmtest.
This commit is contained in:
Joe Thornber
parent
c93e728ef4
commit
c3973c044c
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@ -86,6 +86,7 @@ SOURCE=\
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thin-provisioning/thin_check.cc \
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thin-provisioning/thin_delta.cc \
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thin-provisioning/thin_dump.cc \
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thin-provisioning/thin_ls.cc \
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thin-provisioning/thin_metadata_size.cc \
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thin-provisioning/thin_pool.cc \
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thin-provisioning/thin_repair.cc \
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@ -0,0 +1 @@
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pdata_tools
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@ -11,7 +11,7 @@ thin_provisioning::register_thin_commands(base::application &app)
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app.add_cmd(command::ptr(new thin_check_cmd()));
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app.add_cmd(command::ptr(new thin_delta_cmd()));
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app.add_cmd(command::ptr(new thin_dump_cmd()));
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//app.add_cmd(command::ptr(new thin_ls_cmd()));
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app.add_cmd(command::ptr(new thin_ls_cmd()));
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app.add_cmd(command::ptr(new thin_metadata_size_cmd()));
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app.add_cmd(command::ptr(new thin_restore_cmd()));
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app.add_cmd(command::ptr(new thin_repair_cmd()));
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@ -0,0 +1,298 @@
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// Copyright (C) 2015 Red Hat, Inc. All rights reserved.
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//
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// This file is part of the thin-provisioning-tools source.
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//
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// thin-provisioning-tools is free software: you can redistribute it
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// and/or modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation, either version 3 of
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// the License, or (at your option) any later version.
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//
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// thin-provisioning-tools is distributed in the hope that it will be
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// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with thin-provisioning-tools. If not, see
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// <http://www.gnu.org/licenses/>.
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#include <fstream>
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#include <iostream>
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#include <getopt.h>
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#include <libgen.h>
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#include "human_readable_format.h"
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#include "metadata_dumper.h"
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#include "metadata.h"
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#include "xml_format.h"
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#include "version.h"
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#include "thin-provisioning/commands.h"
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#include "persistent-data/file_utils.h"
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#include "boost/optional.hpp"
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using namespace boost;
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using namespace persistent_data;
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using namespace std;
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using namespace thin_provisioning;
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//----------------------------------------------------------------
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namespace {
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class mapping_set {
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public:
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mapping_set(block_address nr_blocks)
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: bits_(nr_blocks * 2, false) {
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}
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enum block_state {
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UNMAPPED,
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EXCLUSIVE,
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SHARED
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};
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void inc(block_address b) {
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if (bits_[b * 2])
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bits_[b * 2 + 1] = true; // shared
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else
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bits_[b * 2] = true; // exclusive
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}
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block_state get_state(block_address b) const {
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if (bits_[b * 2]) {
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if (bits_[b * 2 + 1])
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return SHARED;
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else
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return EXCLUSIVE;
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} else
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return UNMAPPED;
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}
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private:
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vector<bool> bits_;
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};
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//------------------------------------------------
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struct flags {
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flags()
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: use_metadata_snap(false) {
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}
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bool use_metadata_snap;
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};
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class mapping_pass1 : public mapping_tree_detail::mapping_visitor {
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public:
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mapping_pass1(mapping_set &mappings)
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: mappings_(mappings) {
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}
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virtual void visit(btree_path const &path, mapping_tree_detail::block_time const &bt) {
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mappings_.inc(bt.block_);
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}
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private:
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mapping_set &mappings_;
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};
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class mapping_pass2 : public mapping_tree_detail::mapping_visitor {
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public:
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mapping_pass2(mapping_set const &mappings)
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: mappings_(mappings),
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exclusives_(0) {
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}
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virtual void visit(btree_path const &path, mapping_tree_detail::block_time const &bt) {
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if (mappings_.get_state(bt.block_) == mapping_set::EXCLUSIVE)
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exclusives_++;
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}
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block_address get_exclusives() const {
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return exclusives_;
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}
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private:
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mapping_set const &mappings_;
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block_address exclusives_;
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};
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void raise_metadata_damage() {
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throw std::runtime_error("metadata contains errors (run thin_check for details).");
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}
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class fatal_mapping_damage : public mapping_tree_detail::damage_visitor {
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public:
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virtual void visit(mapping_tree_detail::missing_devices const &d) {
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raise_metadata_damage();
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}
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virtual void visit(mapping_tree_detail::missing_mappings const &d) {
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raise_metadata_damage();
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}
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};
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void pass1(metadata::ptr md, mapping_set &mappings, uint64_t dev_id) {
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dev_tree::key k = {dev_id};
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optional<uint64_t> dev_root = md->mappings_top_level_->lookup(k);
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if (!dev_root)
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throw runtime_error("couldn't find mapping tree root");
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single_mapping_tree dev_mappings(*md->tm_, *dev_root,
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mapping_tree_detail::block_traits::ref_counter(md->tm_->get_sm()));
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mapping_pass1 pass1(mappings);
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fatal_mapping_damage dv;
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walk_mapping_tree(dev_mappings, pass1, dv);
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}
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block_address count_exclusives(metadata::ptr md, mapping_set const &mappings, uint64_t dev_id) {
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dev_tree::key k = {dev_id};
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optional<uint64_t> dev_root = md->mappings_top_level_->lookup(k);
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if (!dev_root)
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throw runtime_error("couldn't find mapping tree root");
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single_mapping_tree dev_mappings(*md->tm_, *dev_root,
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mapping_tree_detail::block_traits::ref_counter(md->tm_->get_sm()));
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mapping_pass2 pass2(mappings);
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fatal_mapping_damage dv;
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walk_mapping_tree(dev_mappings, pass2, dv);
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return pass2.get_exclusives();
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}
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//------------------------------------------------
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typedef map<block_address, device_tree_detail::device_details> dd_map;
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class details_extractor : public device_tree_detail::device_visitor {
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public:
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void visit(block_address dev_id, device_tree_detail::device_details const &dd) {
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dd_.insert(make_pair(dev_id, dd));
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}
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dd_map const &get_details() const {
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return dd_;
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}
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private:
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dd_map dd_;
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};
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struct fatal_details_damage : public device_tree_detail::damage_visitor {
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void visit(device_tree_detail::missing_devices const &d) {
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raise_metadata_damage();
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}
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};
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device_tree_detail::damage_visitor::ptr details_damage_policy() {
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typedef device_tree_detail::damage_visitor::ptr dvp;
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return dvp(new fatal_details_damage());
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}
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//------------------------------------------------
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int ls_(string const &path, ostream &out, struct flags &flags) {
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try {
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block_manager<>::ptr bm(open_bm(path, block_manager<>::READ_ONLY));
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metadata::ptr md(new metadata(bm));
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details_extractor de;
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device_tree_detail::damage_visitor::ptr dd_policy(details_damage_policy());
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walk_device_tree(*md->details_, de, *dd_policy);
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mapping_set mappings(md->data_sm_->get_nr_blocks());
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dd_map const &map = de.get_details();
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dd_map::const_iterator it;
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for (it = map.begin(); it != map.end(); ++it)
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pass1(md, mappings, it->first);
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for (it = map.begin(); it != map.end(); ++it) {
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block_address exclusive = count_exclusives(md, mappings, it->first);
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out << it->first << ": "
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<< it->second.mapped_blocks_ << " mapped blocks, "
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<< exclusive << " exclusive blocks\n";
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}
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} catch (std::exception &e) {
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cerr << e.what() << endl;
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return 1;
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}
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return 0;
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}
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int ls(string const &path, struct flags &flags) {
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return ls_(path, cout, flags);
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}
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void usage(ostream &out, string const &cmd) {
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}
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}
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//----------------------------------------------------------------
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thin_ls_cmd::thin_ls_cmd()
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: command("thin_ls")
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{
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}
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void
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thin_ls_cmd::usage(std::ostream &out) const
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{
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out << "Usage: " << get_name() << " [options] {device|file}" << endl
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<< "Options:" << endl
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<< " {-h|--help}" << endl
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<< " {-m|--metadata-snap}" << endl
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<< " {-V|--version}" << endl;
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}
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int
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thin_ls_cmd::run(int argc, char **argv)
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{
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int c;
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struct flags flags;
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const char shortopts[] = "hm::V";
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const struct option longopts[] = {
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{ "help", no_argument, NULL, 'h'},
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{ "metadata-snap", no_argument, NULL, 'm' },
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{ "version", no_argument, NULL, 'V'},
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{ NULL, no_argument, NULL, 0 }
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};
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while ((c = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) {
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switch(c) {
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case 'h':
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usage(cout);
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return 0;
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case 'm':
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flags.use_metadata_snap = true;
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break;
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case 'V':
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cout << THIN_PROVISIONING_TOOLS_VERSION << endl;
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return 0;
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default:
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usage(cerr);
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return 1;
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}
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}
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if (argc == optind) {
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cerr << "No input file provided." << endl;
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usage(cerr);
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return 1;
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}
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return ls(argv[optind], flags);
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}
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//----------------------------------------------------------------
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