thin_debug

This commit is contained in:
Joe Thornber 2012-03-08 17:20:46 +00:00
parent dce7013577
commit da8afff35f
2 changed files with 285 additions and 0 deletions

View File

@ -19,6 +19,7 @@
.PHONY: all .PHONY: all
PROGRAMS=\ PROGRAMS=\
thin_debug \
thin_check \ thin_check \
thin_dump \ thin_dump \
thin_restore thin_restore
@ -85,6 +86,7 @@ test-programs: $(TEST_PROGRAMS)
%.o: %.cc %.o: %.cc
$(CXX) -c $(INCLUDES) $(CXXFLAGS) -o $@ $< $(CXX) -c $(INCLUDES) $(CXXFLAGS) -o $@ $<
THIN_DEBUG_SOURCE=$(SOURCE)
THIN_DUMP_SOURCE=$(SOURCE) THIN_DUMP_SOURCE=$(SOURCE)
THIN_RESTORE_SOURCE=$(SOURCE) THIN_RESTORE_SOURCE=$(SOURCE)
THIN_CHECK_SOURCE=\ THIN_CHECK_SOURCE=\
@ -101,10 +103,14 @@ THIN_CHECK_SOURCE=\
space_map_transactional.cc \ space_map_transactional.cc \
transaction_manager.cc transaction_manager.cc
THIN_DEBUG_OBJECTS=$(subst .cc,.o,$(THIN_DEBUG_SOURCE))
THIN_DUMP_OBJECTS=$(subst .cc,.o,$(THIN_DUMP_SOURCE)) THIN_DUMP_OBJECTS=$(subst .cc,.o,$(THIN_DUMP_SOURCE))
THIN_RESTORE_OBJECTS=$(subst .cc,.o,$(THIN_RESTORE_SOURCE)) THIN_RESTORE_OBJECTS=$(subst .cc,.o,$(THIN_RESTORE_SOURCE))
THIN_CHECK_OBJECTS=$(subst .cc,.o,$(THIN_CHECK_SOURCE)) THIN_CHECK_OBJECTS=$(subst .cc,.o,$(THIN_CHECK_SOURCE))
thin_debug: $(THIN_DEBUG_OBJECTS) thin_debug.o
$(CXX) $(CXXFLAGS) -o $@ $+ $(LIBS) $(LIBEXPAT)
thin_dump: $(THIN_DUMP_OBJECTS) thin_dump.o thin_dump: $(THIN_DUMP_OBJECTS) thin_dump.o
$(CXX) $(CXXFLAGS) -o $@ $+ $(LIBS) $(LIBEXPAT) $(CXX) $(CXXFLAGS) -o $@ $+ $(LIBS) $(LIBEXPAT)

279
thin_debug.cc Normal file
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@ -0,0 +1,279 @@
// Copyright (C) 2012 Red Hat, Inc. All rights reserved.
//
// This file is part of the thin-provisioning-tools source.
//
// thin-provisioning-tools is free software: you can redistribute it
// and/or modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// thin-provisioning-tools is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with thin-provisioning-tools. If not, see
// <http://www.gnu.org/licenses/>.
#include <boost/algorithm/string/classification.hpp>
#include <boost/algorithm/string/split.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/tuple/tuple.hpp>
#include <getopt.h>
#include <iostream>
#include <libgen.h>
#include <map>
#include <string>
#include <vector>
#include "btree.h"
#include "metadata.h"
#include "metadata_checker.h"
#include "version.h"
using namespace boost;
using namespace persistent_data;
using namespace std;
using namespace thin_provisioning;
namespace {
typedef vector<string> strings;
class table_formatter {
public:
virtual ~table_formatter() {}
typedef optional<string> maybe_string;
void field(string const &name, string const &value, maybe_string const &units = maybe_string()) {
fields_.push_back(field_type(name, value, units));
}
virtual void output(ostream &out) = 0;
protected:
typedef tuple<string, string, maybe_string> field_type;
vector<field_type> fields_;
};
template <typename T>
void
field(table_formatter &t, string const &name, T const &value) {
t.field(name, lexical_cast<string>(value));
}
template <typename T>
void
field(table_formatter &t, string const &name, T const &value, string const &units) {
t.field(name, lexical_cast<string>(value), optional<string>(units));
}
//--------------------------------
class text_formatter : public table_formatter {
public:
virtual void output(ostream &out) {
vector<field_type>::const_iterator it;
for (it = fields_.begin(); it != fields_.end(); ++it) {
out << it->get<0>() << ": " << it->get<1>();
if (it->get<2>())
out << " " << *(it->get<2>()) << "(s)";
out << endl;
}
}
};
//--------------------------------
class command {
public:
typedef boost::shared_ptr<command> ptr;
virtual ~command() {}
virtual void exec(strings const &args, ostream &out) = 0;
};
class command_interpreter {
public:
command_interpreter(istream &in, ostream &out)
: in_(in),
out_(out) {
}
void register_command(string const &str, command::ptr cmd) {
commands_.insert(make_pair(str, cmd));
}
void enter_main_loop() {
while (true)
do_once();
}
private:
strings read_input() {
using namespace boost::algorithm;
string input;
getline(in_, input);
strings toks;
split(toks, input, is_any_of(" \t"), token_compress_on);
return toks;
}
void do_once() {
if (in_.eof())
throw runtime_error("input closed");
out_ << "> ";
strings args = read_input();
map<string, command::ptr>::iterator it;
it = commands_.find(args[0]);
if (it == commands_.end())
out_ << "Unrecognised command" << endl;
else
it->second->exec(args, out_);
}
istream &in_;
ostream &out_;
map <string, command::ptr> commands_;
};
//--------------------------------
class hello : public command {
virtual void exec(strings const &args, ostream &out) {
out << "Hello, world!" << endl;
}
};
class show_superblock : public command {
public:
explicit show_superblock(metadata::ptr md)
: md_(md) {
}
virtual void exec(strings const &args, ostream &out) {
text_formatter f;
superblock const &sb = md_->sb_;
field(f, "csum", sb.csum_);
field(f, "flags", sb.flags_);
field(f, "blocknr", sb.blocknr_);
field(f, "uuid", sb.uuid_); // FIXME: delimit, and handle non-printable chars
field(f, "magic", sb.magic_);
field(f, "version", sb.version_);
field(f, "time", sb.time_);
field(f, "trans id", sb.trans_id_);
field(f, "held root", sb.held_root_);
field(f, "data mapping root", sb.data_mapping_root_);
field(f, "device details root", sb.device_details_root_);
field(f, "data block size", sb.data_block_size_, "sector");
field(f, "metadata block size", sb.metadata_block_size_, "sector");
field(f, "metadata nr blocks", sb.metadata_nr_blocks_);
field(f, "compat flags", sb.compat_flags_);
field(f, "compat ro flags", sb.compat_ro_flags_);
field(f, "incompat flags", sb.incompat_flags_);
f.output(out);
}
private:
metadata::ptr md_;
};
template <typename ValueTraits>
class show_btree_node : public command {
public:
explicit show_btree_node(metadata::ptr md)
: md_(md) {
}
virtual void exec(strings const &args, ostream &out) {
using namespace persistent_data::btree_detail;
if (args.size() != 2)
throw runtime_error("incorrect number of arguments");
block_address block = lexical_cast<block_address>(args[1]);
block_manager<>::read_ref rr = md_->tm_->read_lock(block);
node_ref<ValueTraits> n = btree_detail::to_node<ValueTraits>(rr);
text_formatter f;
field(f, "csum", n.get_checksum());
field(f, "blocknr", n.get_location());
field(f, "type", n.get_type() == INTERNAL ? "internal" : "leaf");
field(f, "nr entries", n.get_nr_entries());
field(f, "max entries", n.get_max_entries());
field(f, "value size", n.get_value_size());
f.output(out);
}
private:
metadata::ptr md_;
};
//--------------------------------
int debug(string const &path) {
try {
metadata::ptr md(new metadata(path, metadata::OPEN));
command_interpreter interp(cin, cout);
interp.register_command("hello", command::ptr(new hello));
interp.register_command("superblock", command::ptr(new show_superblock(md)));
interp.register_command("btree_node", command::ptr(new show_btree_node<device_details_traits>(md)));
interp.enter_main_loop();
} catch (std::exception &e) {
cerr << e.what();
return 1;
}
return 0;
}
void usage(string const &cmd) {
cerr << "Usage: " << cmd << " {device|file}" << endl
<< "Options:" << endl
<< " {-h|--help}" << endl
<< " {-V|--version}" << endl;
}
}
int main(int argc, char **argv)
{
int c;
const char shortopts[] = "hV";
const struct option longopts[] = {
{ "help", no_argument, NULL, 'h'},
{ "version", no_argument, NULL, 'V'},
{ NULL, no_argument, NULL, 0 }
};
while ((c = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) {
switch(c) {
case 'h':
usage(basename(argv[0]));
return 0;
case 'V':
cerr << THIN_PROVISIONING_TOOLS_VERSION << endl;
return 0;
}
}
if (argc == optind) {
usage(basename(argv[0]));
exit(1);
}
return debug(argv[optind]);
}