332 lines
9.7 KiB
C++
332 lines
9.7 KiB
C++
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// 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/lexical_cast.hpp>
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#include <getopt.h>
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#include <iostream>
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#include <string>
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#include "base/command_interpreter.h"
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#include "base/output_formatter.h"
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#include "persistent-data/file_utils.h"
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#include "persistent-data/data-structures/btree.h"
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#include "persistent-data/data-structures/simple_traits.h"
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#include "persistent-data/space-maps/disk_structures.h"
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#include "caching/commands.h"
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#include "caching/metadata.h"
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#include "version.h"
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using namespace dbg;
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using namespace persistent_data;
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using namespace std;
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using namespace caching;
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//----------------------------------------------------------------
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namespace {
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class hello : public dbg::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 help : public dbg::command {
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virtual void exec(strings const &args, ostream &out) {
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out << "Commands:" << endl
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<< " superblock" << endl
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<< " mapping_node <block# of tree node for mappings>" << endl
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<< " mapping_array <block# of array block for mappings>" << endl
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<< " exit" << endl;
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}
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};
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class exit_handler : public dbg::command {
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public:
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exit_handler(command_interpreter::ptr interpreter)
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: interpreter_(interpreter) {
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}
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virtual void exec(strings const &args, ostream &out) {
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out << "Goodbye!" << endl;
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interpreter_->exit_main_loop();
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}
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command_interpreter::ptr interpreter_;
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};
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class sm_root_show_traits : public persistent_data::sm_disk_detail::sm_root_traits {
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public:
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static void show(formatter::ptr f, string const &key,
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persistent_data::sm_disk_detail::sm_root const &value) {
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field(*f, "nr_blocks", value.nr_blocks_);
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field(*f, "nr_allocated", value.nr_allocated_);
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field(*f, "bitmap_root", value.bitmap_root_);
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field(*f, "ref_count_root", value.ref_count_root_);
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}
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};
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class show_superblock : public dbg::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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formatter::ptr f = create_xml_formatter();
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ostringstream version;
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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.encode());
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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, "policy_name", reinterpret_cast<char const*>(sb.policy_name));
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version << sb.policy_version[0] << "."
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<< sb.policy_version[1] << "."
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<< sb.policy_version[2];
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field(*f, "policy_version", version.str().c_str());
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field(*f, "policy_hint_size", sb.policy_hint_size);
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sm_disk_detail::sm_root_disk const *d;
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sm_disk_detail::sm_root v;
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{
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d = reinterpret_cast<sm_disk_detail::sm_root_disk const *>(sb.metadata_space_map_root);
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sm_disk_detail::sm_root_traits::unpack(*d, v);
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formatter::ptr f2 = create_xml_formatter();
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sm_root_show_traits::show(f2, "value", v);
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f->child("metadata_space_map_root", f2);
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}
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field(*f, "mapping_root", sb.mapping_root);
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if (sb.version >= 2)
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field(*f, "dirty_root", *sb.dirty_root);
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field(*f, "hint_root", sb.hint_root);
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field(*f, "discard_root", sb.discard_root);
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field(*f, "discard_block_size", sb.discard_block_size);
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field(*f, "discard_nr_blocks", sb.discard_nr_blocks);
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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, "cache_blocks", sb.cache_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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field(*f, "read_hits", sb.read_hits);
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field(*f, "read_misses", sb.read_misses);
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field(*f, "write_hits", sb.write_hits);
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field(*f, "write_misses", sb.write_misses);
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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 uint64_show_traits : public uint64_traits {
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public:
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static void show(formatter::ptr f, string const &key, uint64_t const &value) {
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field(*f, key, boost::lexical_cast<string>(value));
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}
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};
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// FIXME: Expose the array ValueTraits parameter or not?
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// Since the block_traits isn't related to the ValueTraits.
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class block_show_traits : public persistent_data::array<caching::mapping_traits>::block_traits {
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public:
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static void show(formatter::ptr f, string const &key, block_address const &value) {
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field(*f, "block", value);
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}
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};
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class mapping_show_traits : public caching::mapping_traits {
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public:
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static void show(formatter::ptr f, string const &key, caching::mapping const &value) {
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field(*f, "oblock", value.oblock_);
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field(*f, "flags", value.flags_);
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}
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};
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template <typename ValueTraits>
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class show_btree_node : public dbg::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 = boost::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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formatter::ptr f = create_xml_formatter();
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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 = create_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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template <typename ValueTraits>
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class show_array_block : public dbg::command {
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typedef array_block<ValueTraits, block_manager::read_ref> rblock;
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public:
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explicit show_array_block(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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if (args.size() != 2)
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throw runtime_error("incorrect number of arguments");
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block_address block = boost::lexical_cast<block_address>(args[1]);
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block_manager::read_ref rr = md_->tm_->read_lock(block);
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rblock b(rr, typename ValueTraits::ref_counter());
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show_array_entries(b, out);
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}
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private:
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void show_array_entries(rblock const& b, ostream &out) {
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formatter::ptr f = create_xml_formatter();
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uint32_t nr_entries = b.nr_entries();
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field(*f, "max_entries", b.max_entries());
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field(*f, "nr_entries", nr_entries);
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field(*f, "value_size", b.value_size());
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for (unsigned i = 0; i < nr_entries; i++) {
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formatter::ptr f2 = create_xml_formatter();
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field(*f2, "index", i);
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ValueTraits::show(f2, "value", b.get(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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using dbg::command;
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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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command_interpreter::ptr interp = create_command_interpreter(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("mapping_node", command::ptr(new show_btree_node<block_show_traits>(md)));
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interp->register_command("mapping_array", command::ptr(new show_array_block<mapping_show_traits>(md)));
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interp->register_command("help", command::ptr(new help));
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interp->register_command("exit", command::ptr(new exit_handler(interp)));
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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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}
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//----------------------------------------------------------------
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cache_debug_cmd::cache_debug_cmd()
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: command("cache_debug")
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{
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}
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void
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cache_debug_cmd::usage(std::ostream &out) const
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{
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out << "Usage: " << get_name() << " {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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int
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cache_debug_cmd::run(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(cout);
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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(cerr);
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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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//----------------------------------------------------------------
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