346 lines
8.8 KiB
C++
346 lines
8.8 KiB
C++
// Copyright (C) 2012 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 <boost/algorithm/string/classification.hpp>
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#include <boost/algorithm/string/split.hpp>
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#include <boost/lexical_cast.hpp>
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#include <boost/tuple/tuple.hpp>
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#include <boost/variant.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 <map>
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#include <string>
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#include <vector>
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#include "persistent-data/data-structures/btree.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 "version.h"
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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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namespace {
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typedef vector<string> strings;
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class formatter {
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public:
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typedef shared_ptr<formatter> ptr;
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virtual ~formatter() {}
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typedef optional<string> maybe_string;
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void field(string const &name, string const &value) {
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fields_.push_back(field_type(name, value));
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}
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void child(string const &name, formatter::ptr t) {
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fields_.push_back(field_type(name, t));
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}
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virtual void output(ostream &out, int depth = 0) = 0;
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protected:
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typedef variant<string, ptr> value;
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typedef tuple<string, value> field_type;
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vector<field_type> fields_;
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};
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template <typename T>
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void
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field(formatter &t, string const &name, T const &value) {
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t.field(name, lexical_cast<string>(value));
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}
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//--------------------------------
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class xml_formatter : public formatter {
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public:
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virtual void output(ostream &out, int depth) {
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indent(depth, out);
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out << "<fields>" << endl;
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vector<field_type>::const_iterator it;
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for (it = fields_.begin(); it != fields_.end(); ++it) {
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if (string const *s = get<string>(&it->get<1>())) {
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indent(depth + 1, out);
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out << "<field key=\""
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<< it->get<0>()
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<< "\" value=\""
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<< *s
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<< "\"/>"
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<< endl;
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} else {
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formatter::ptr f = get<formatter::ptr>(it->get<1>());
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f->output(out, depth + 1);
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}
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}
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indent(depth, out);
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out << "</fields>" << endl;
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}
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private:
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void indent(int depth, ostream &out) const {
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for (int i = 0; i < depth * 2; i++)
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out << ' ';
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}
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};
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//--------------------------------
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class command {
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public:
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typedef std::shared_ptr<command> ptr;
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virtual ~command() {}
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virtual void exec(strings const &args, ostream &out) = 0;
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};
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class command_interpreter {
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public:
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command_interpreter(istream &in, ostream &out)
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: in_(in),
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out_(out) {
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}
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void register_command(string const &str, command::ptr cmd) {
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commands_.insert(make_pair(str, cmd));
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}
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void enter_main_loop() {
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while (true)
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do_once();
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}
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private:
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strings read_input() {
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using namespace boost::algorithm;
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string input;
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getline(in_, input);
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strings toks;
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split(toks, input, is_any_of(" \t"), token_compress_on);
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return toks;
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}
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void do_once() {
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if (in_.eof())
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throw runtime_error("input closed");
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out_ << "> ";
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strings args = read_input();
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map<string, command::ptr>::iterator it;
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it = commands_.find(args[0]);
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if (it == commands_.end())
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out_ << "Unrecognised command" << endl;
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else
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it->second->exec(args, out_);
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}
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istream &in_;
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ostream &out_;
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map <string, command::ptr> commands_;
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};
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//--------------------------------
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class hello : public command {
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virtual void exec(strings const &args, ostream &out) {
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out << "Hello, world!" << endl;
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}
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};
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class show_superblock : public command {
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public:
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explicit show_superblock(metadata::ptr md)
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: md_(md) {
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}
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virtual void exec(strings const &args, ostream &out) {
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xml_formatter f;
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superblock const &sb = md_->sb_;
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field(f, "csum", sb.csum_);
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field(f, "flags", sb.flags_);
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field(f, "blocknr", sb.blocknr_);
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field(f, "uuid", sb.uuid_); // FIXME: delimit, and handle non-printable chars
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field(f, "magic", sb.magic_);
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field(f, "version", sb.version_);
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field(f, "time", sb.time_);
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field(f, "trans id", sb.trans_id_);
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field(f, "metadata snap", sb.metadata_snap_);
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field(f, "data mapping root", sb.data_mapping_root_);
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field(f, "device details root", sb.device_details_root_);
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field(f, "data block size", sb.data_block_size_);
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field(f, "metadata block size", sb.metadata_block_size_);
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field(f, "metadata nr blocks", sb.metadata_nr_blocks_);
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field(f, "compat flags", sb.compat_flags_);
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field(f, "compat ro flags", sb.compat_ro_flags_);
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field(f, "incompat flags", sb.incompat_flags_);
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f.output(out, 0);
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}
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private:
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metadata::ptr md_;
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};
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class device_details_show_traits : public device_details_traits {
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public:
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static void show(formatter &f, string const &key, device_details const &value) {
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field(f, "mapped blocks", value.mapped_blocks_);
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field(f, "transaction id", value.transaction_id_);
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field(f, "creation time", value.creation_time_);
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field(f, "snap time", value.snapshotted_time_);
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}
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};
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class uint64_show_traits : public uint64_traits {
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public:
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static void show(formatter &f, string const &key, uint64_t const &value) {
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field(f, key, lexical_cast<string>(value));
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}
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};
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class block_show_traits : public block_traits {
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public:
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static void show(formatter &f, string const &key, block_time const &value) {
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field(f, "block", value.block_);
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field(f, "time", value.time_);
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}
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};
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template <typename ValueTraits>
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class show_btree_node : public command {
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public:
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explicit show_btree_node(metadata::ptr md)
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: md_(md) {
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}
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virtual void exec(strings const &args, ostream &out) {
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using namespace persistent_data::btree_detail;
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if (args.size() != 2)
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throw runtime_error("incorrect number of arguments");
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block_address block = lexical_cast<block_address>(args[1]);
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block_manager<>::read_ref rr = md_->tm_->read_lock(block);
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node_ref<uint64_show_traits> n = btree_detail::to_node<uint64_show_traits>(rr);
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if (n.get_type() == INTERNAL)
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show_node<uint64_show_traits>(n, out);
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else {
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node_ref<ValueTraits> n = btree_detail::to_node<ValueTraits>(rr);
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show_node<ValueTraits>(n, out);
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}
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}
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private:
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template <typename VT>
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void show_node(node_ref<VT> n, ostream &out) {
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xml_formatter f;
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field(f, "csum", n.get_checksum());
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field(f, "blocknr", n.get_location());
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field(f, "type", n.get_type() == INTERNAL ? "internal" : "leaf");
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field(f, "nr entries", n.get_nr_entries());
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field(f, "max entries", n.get_max_entries());
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field(f, "value size", n.get_value_size());
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for (unsigned i = 0; i < n.get_nr_entries(); i++) {
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formatter::ptr f2(new xml_formatter);
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field(*f2, "key", n.key_at(i));
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VT::show(*f2, "value", n.value_at(i));
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f.child("child", f2);
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}
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f.output(out, 0);
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}
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metadata::ptr md_;
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};
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//--------------------------------
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int debug(string const &path) {
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try {
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metadata::ptr md(new metadata(path, metadata::OPEN));
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command_interpreter interp(cin, cout);
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interp.register_command("hello", command::ptr(new hello));
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interp.register_command("superblock", command::ptr(new show_superblock(md)));
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interp.register_command("m1_node", command::ptr(new show_btree_node<uint64_show_traits>(md)));
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interp.register_command("m2_node", command::ptr(new show_btree_node<block_show_traits>(md)));
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interp.register_command("detail_node", command::ptr(new show_btree_node<device_details_show_traits>(md)));
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interp.enter_main_loop();
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} catch (std::exception &e) {
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cerr << e.what();
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return 1;
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}
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return 0;
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}
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void usage(string const &cmd) {
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cerr << "Usage: " << cmd << " {device|file}" << endl
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<< "Options:" << endl
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<< " {-h|--help}" << endl
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<< " {-V|--version}" << endl;
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}
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}
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int main(int argc, char **argv)
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{
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int c;
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const char shortopts[] = "hV";
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const struct option longopts[] = {
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{ "help", no_argument, NULL, 'h'},
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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(basename(argv[0]));
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return 0;
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case 'V':
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cerr << THIN_PROVISIONING_TOOLS_VERSION << endl;
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return 0;
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}
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}
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if (argc == optind) {
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usage(basename(argv[0]));
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exit(1);
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}
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return debug(argv[optind]);
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}
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