diff --git a/CMakeLists.txt b/CMakeLists.txt index b810c17f..cccb2026 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -417,7 +417,7 @@ if(WITH_TESTS OR WITH_BENCHMARKS OR WITH_FUZZ) if(WITH_BENCHMARKS) target_sources(dwarfs_test_helpers PRIVATE test/test_strings.cpp) endif() - target_link_libraries(dwarfs_test_helpers PUBLIC dwarfs_common dwarfs_writer dwarfs_tool) + target_link_libraries(dwarfs_test_helpers PUBLIC dwarfs_reader dwarfs_writer dwarfs_tool) set_property(TARGET dwarfs_test_helpers PROPERTY CXX_STANDARD 20) endif() @@ -443,6 +443,7 @@ if(WITH_TESTS) integral_value_parser_test lazy_value_test metadata_requirements_test + metadata_test options_test packed_int_vector_test packed_ptr_test diff --git a/cmake/libdwarfs.cmake b/cmake/libdwarfs.cmake index 09c5f941..041b85c6 100644 --- a/cmake/libdwarfs.cmake +++ b/cmake/libdwarfs.cmake @@ -102,6 +102,7 @@ add_library( src/writer/fragment_category.cpp src/writer/fragment_order_parser.cpp src/writer/inode_fragments.cpp + src/writer/metadata_options.cpp src/writer/rule_based_entry_filter.cpp src/writer/scanner.cpp src/writer/segmenter.cpp diff --git a/doc/mkdwarfs.md b/doc/mkdwarfs.md index adb2b993..05e37e2f 100644 --- a/doc/mkdwarfs.md +++ b/doc/mkdwarfs.md @@ -227,6 +227,11 @@ Most other options are concerned with compression tuning: metadata to uncompressed metadata without having to rebuild or recompress all the other data. +- `--rebuild-metadata`: + Completely rebuild the metadata block. This will upgrade the internal format + of the metadata to the latest version instead of just recompressing the + metadata block. + - `--recompress-categories=`[`!`]*category*[`,`...]: When `--recompress` is set to `all` or `block`, this option controls which categories of blocks will be recompressed. Adding a `!` in front diff --git a/include/dwarfs/utility/rewrite_options.h b/include/dwarfs/utility/rewrite_options.h index 979f08ac..33c3d2b8 100644 --- a/include/dwarfs/utility/rewrite_options.h +++ b/include/dwarfs/utility/rewrite_options.h @@ -27,12 +27,14 @@ #include #include +#include namespace dwarfs::utility { struct rewrite_options { bool recompress_block{false}; bool recompress_metadata{false}; + std::optional rebuild_metadata; std::unordered_set recompress_categories; bool recompress_categories_exclude{false}; bool enable_history{true}; diff --git a/include/dwarfs/writer/metadata_options.h b/include/dwarfs/writer/metadata_options.h index 837419dc..7e290efd 100644 --- a/include/dwarfs/writer/metadata_options.h +++ b/include/dwarfs/writer/metadata_options.h @@ -24,6 +24,7 @@ #include #include #include +#include #include #include #include @@ -56,4 +57,6 @@ struct metadata_options { size_t inode_size_cache_min_chunk_count{128}; }; +std::ostream& operator<<(std::ostream& os, metadata_options const& options); + } // namespace dwarfs::writer diff --git a/src/utility/rewrite_filesystem.cpp b/src/utility/rewrite_filesystem.cpp index 729f609f..382f81a0 100644 --- a/src/utility/rewrite_filesystem.cpp +++ b/src/utility/rewrite_filesystem.cpp @@ -30,6 +30,10 @@ #include #include #include +#include +#include + +#include namespace dwarfs::utility { @@ -163,12 +167,31 @@ void rewrite_filesystem(logger& lgr, dwarfs::reader::filesystem_v2 const& fs, case section_type::METADATA_V2_SCHEMA: case section_type::METADATA_V2: - if (opts.recompress_metadata && !from_none_to_none(s)) { - log_recompress(s); - writer.write_section(s->type(), s->compression(), - parser->section_data(*s)); + if (opts.rebuild_metadata) { + DWARFS_CHECK(opts.recompress_metadata, + "rebuild_metadata requires recompress_metadata"); + if (s->type() == section_type::METADATA_V2) { + using namespace dwarfs::writer::internal; + + auto md = fs.unpacked_metadata(); + auto builder = metadata_builder(lgr, std::move(*md), + opts.rebuild_metadata.value()); + auto [schema, data] = + metadata_freezer(LOG_GET_LOGGER).freeze(builder.build()); + + writer.write_metadata_v2_schema( + std::make_shared(std::move(schema))); + writer.write_metadata_v2( + std::make_shared(std::move(data))); + } } else { - copy_compressed(s); + if (opts.recompress_metadata && !from_none_to_none(s)) { + log_recompress(s); + writer.write_section(s->type(), s->compression(), + parser->section_data(*s)); + } else { + copy_compressed(s); + } } break; diff --git a/src/writer/internal/metadata_builder.cpp b/src/writer/internal/metadata_builder.cpp index 59af6b82..cdabe705 100644 --- a/src/writer/internal/metadata_builder.cpp +++ b/src/writer/internal/metadata_builder.cpp @@ -23,12 +23,14 @@ #include #include +#include + #include #include - #include #include +#include #include #include #include @@ -38,6 +40,8 @@ #include +#include + namespace dwarfs::writer::internal { namespace { @@ -55,13 +59,17 @@ class metadata_builder_ final : public metadata_builder::impl { metadata_options const& options) : LOG_PROXY_INIT(lgr) , md_{md} - , options_{options} {} + , options_{options} { + upgrade_metadata(); + } metadata_builder_(logger& lgr, thrift::metadata::metadata&& md, metadata_options const& options) : LOG_PROXY_INIT(lgr) , md_{std::move(md)} - , options_{options} {} + , options_{options} { + upgrade_metadata(); + } void set_devices(std::vector devices) override { md_.devices() = std::move(devices); @@ -111,6 +119,8 @@ class metadata_builder_ final : public metadata_builder::impl { private: thrift::metadata::inode_size_cache build_inode_size_cache() const; + void upgrade_metadata(); + void upgrade_from_pre_v2_2(); LOG_PROXY_DECL(LoggerPolicy); thrift::metadata::metadata md_; @@ -314,8 +324,11 @@ thrift::metadata::metadata const& metadata_builder_::build() { ti << "saving symlinks table..."; } + // TODO: don't overwrite all options when upgrading! md_.options() = fsopts; md_.features() = features_.get(); + + // TODO: try and keep metadata upgrade history md_.dwarfs_version() = std::string("libdwarfs ") + DWARFS_GIT_ID; if (!options_.no_create_timestamp) { md_.create_timestamp() = std::time(nullptr); @@ -326,6 +339,208 @@ thrift::metadata::metadata const& metadata_builder_::build() { return md_; } +template +void metadata_builder_::upgrade_from_pre_v2_2() { + // === v2.2 metadata === + // + // - `directories` is indexed by directory inode number; this is exactly + // the same as today. + // - `entry_table_v2_2` is indexed by "inode number" and returns an index + // into `inodes`. + // - `inodes` sort of combine the inode data with data from the new + // `dir_entries` array. Inodes are ordered by directory entry index + // (i.e. `first_entry`, `parent_entry` can be used to directly index + // into `inodes`). + // - The format cannot properly represent hardlinks. Rather, it represents + // all shared files as hardlinks, which is not correct. + // + // In order to upgrade to the new format, we need to: + // + // - Keep the `directories` array as is. + // - Rebuild the `inodes` array to be indexed by inode number; the new + // format potentially has *much* more inode numbers than the old format + // because shared files don't share inode numbers anymore, only hardlinks + // do. The order of the new `inodes` array is exactly the same as the + // old `entry_table_v2_2` array, *except* for regular files, where order + // needs to take shared files into account. This means regular file + // inode numbers will change and this needs to be tracked. This also + // means that both the `chunk_table` and `chunks` arrays need to be + // rebuilt. + // - Build the `shared_files_table` array. If multiple entries in `inodes` + // share the same `inode_v2_2`, they are considered shared files. + // - Don't try to perform any hardlink detection, as the old format doesn't + // properly represent hardlinks. + // - Build the `dir_entries` array. + // + // Here's a rough outline of the upgrade process: + // + // - Determine the number of entries that reference the same `inode_v2_2`. + // This will allow us to distinguish between unique and shared files. + + LOG_DEBUG << "upgrading entry_table_v2_2 to dir_entries"; + + auto const lnk_offset = find_inode_rank_offset(md_, inode_rank::INO_LNK); + auto const reg_offset = find_inode_rank_offset(md_, inode_rank::INO_REG); + auto const dev_offset = find_inode_rank_offset(md_, inode_rank::INO_DEV); + + LOG_TRACE << "lnk_offset: " << lnk_offset; + LOG_TRACE << "reg_offset: " << reg_offset; + LOG_TRACE << "dev_offset: " << dev_offset; + + std::vector reg_inode_refs(md_.chunk_table()->size() - 1, 0); + + for (auto const& inode : md_.inodes().value()) { + auto const inode_v2_2 = inode.inode_v2_2().value(); + if (reg_offset <= inode_v2_2 && inode_v2_2 < dev_offset) { + auto const index = inode_v2_2 - reg_offset; + if (index < reg_inode_refs.size()) { + ++reg_inode_refs[index]; + } + } + } + + auto const unique_files = + std::count_if(reg_inode_refs.begin(), reg_inode_refs.end(), + [](auto ref) { return ref == 1; }); + + auto const num_reg_files = + std::accumulate(reg_inode_refs.begin(), reg_inode_refs.end(), 0, + [](auto sum, auto ref) { return sum + ref; }); + + LOG_TRACE << "unique_files: " << unique_files; + LOG_TRACE << "num_reg_files: " << num_reg_files; + + auto const& entry_table = md_.entry_table_v2_2().value(); + + thrift::metadata::metadata newmd; + auto& dir_entries = newmd.dir_entries().emplace(); + dir_entries.reserve(md_.inodes()->size()); + auto& shared_files = newmd.shared_files_table().emplace(); + shared_files.reserve(num_reg_files - unique_files); + auto& chunks = newmd.chunks().ensure(); + chunks.reserve(md_.chunks()->size()); + auto& chunk_table = newmd.chunk_table().ensure(); + chunk_table.reserve(md_.chunk_table()->size()); + chunk_table.push_back(0); + auto& inodes = newmd.inodes().ensure(); + inodes.resize(md_.inodes()->size()); + + newmd.directories().copy_from(md_.directories()); + for (auto& d : newmd.directories().value()) { + d.parent_entry() = entry_table[d.parent_entry().value()]; + } + auto& dirs = newmd.directories().value(); + + uint32_t const shared_offset = reg_offset + unique_files; + uint32_t unique_inode = reg_offset; + uint32_t shared_inode = shared_offset; + uint32_t shared_chunk_index = 0; + std::unordered_map shared_inode_map; + std::vector shared_chunks; + std::vector shared_chunk_table; + shared_chunk_table.push_back(0); + + for (auto const& inode : md_.inodes().value()) { + auto const self_index = dir_entries.size(); + auto& de = dir_entries.emplace_back(); + de.name_index() = inode.name_index_v2_2().value(); + auto inode_v2_2 = inode.inode_v2_2().value(); + + if (inode_v2_2 < reg_offset) { + de.inode_num() = inode_v2_2; + + // must reconstruct self_entry for directories + if (inode_v2_2 < lnk_offset) { + dirs.at(inode_v2_2).self_entry() = self_index; + } + } else if (inode_v2_2 < dev_offset) { + auto const index = inode_v2_2 - reg_offset; + auto const refs = reg_inode_refs[index]; + auto const chunk_begin = md_.chunk_table()->at(index); + auto const chunk_end = md_.chunk_table()->at(index + 1); + + if (refs == 1) { + chunk_table.push_back(chunk_table.back() + chunk_end - chunk_begin); + for (uint32_t i = chunk_begin; i < chunk_end; ++i) { + chunks.push_back(md_.chunks()->at(i)); + } + de.inode_num() = unique_inode++; + } else { + auto [it, inserted] = + shared_inode_map.emplace(inode_v2_2, shared_inode); + if (inserted) { + for (uint32_t i = 0; i < refs; ++i) { + shared_files.push_back(shared_chunk_index); + } + ++shared_chunk_index; + shared_inode += refs; + shared_chunk_table.push_back(shared_chunk_table.back() + chunk_end - + chunk_begin); + for (uint32_t i = chunk_begin; i < chunk_end; ++i) { + shared_chunks.push_back(md_.chunks()->at(i)); + } + } + de.inode_num() = it->second++; + } + } else { + de.inode_num() = (inode_v2_2 - dev_offset) + reg_offset + num_reg_files; + LOG_TRACE << "dev/oth inode: " << inode_v2_2 << " -> " + << de.inode_num().value(); + } + + auto& ni = inodes.at(de.inode_num().value()); + ni.mode_index() = inode.mode_index().value(); + ni.owner_index() = inode.owner_index().value(); + ni.group_index() = inode.group_index().value(); + ni.atime_offset() = inode.atime_offset().value(); + ni.mtime_offset() = inode.mtime_offset().value(); + ni.ctime_offset() = inode.ctime_offset().value(); + } + + std::transform(shared_chunk_table.begin(), shared_chunk_table.end(), + shared_chunk_table.begin(), + [&](auto i) { return i + chunks.size(); }); + + DWARFS_CHECK(chunk_table.back() == shared_chunk_table.front(), + "inconsistent chunk tables"); + + chunks.insert(chunks.end(), shared_chunks.begin(), shared_chunks.end()); + chunk_table.insert(chunk_table.end(), shared_chunk_table.begin() + 1, + shared_chunk_table.end()); + + newmd.symlink_table().copy_from(md_.symlink_table()); + newmd.uids().copy_from(md_.uids()); + newmd.gids().copy_from(md_.gids()); + newmd.modes().copy_from(md_.modes()); + newmd.names().copy_from(md_.names()); + newmd.symlinks().copy_from(md_.symlinks()); + newmd.timestamp_base().copy_from(md_.timestamp_base()); + newmd.block_size().copy_from(md_.block_size()); + newmd.total_fs_size().copy_from(md_.total_fs_size()); + newmd.devices().copy_from(md_.devices()); + newmd.options().copy_from(md_.options()); + + md_ = std::move(newmd); +} + +template +void metadata_builder_::upgrade_metadata() { + auto tv = LOG_TIMED_VERBOSE; + + // std::cout << apache::thrift::debugString(md_); + + if (md_.entry_table_v2_2().is_set()) { + DWARFS_CHECK(!md_.dir_entries().has_value(), + "unexpected dir_entries in metadata"); + + upgrade_from_pre_v2_2(); + } + + // TODO: update uid, gid, timestamp, mtime_only, time_resolution_sec + + tv << "upgrading metadata..."; +} + } // namespace metadata_builder::metadata_builder(logger& lgr, metadata_options const& options) diff --git a/src/writer/metadata_options.cpp b/src/writer/metadata_options.cpp new file mode 100644 index 00000000..6409536d --- /dev/null +++ b/src/writer/metadata_options.cpp @@ -0,0 +1,81 @@ +/* vim:set ts=2 sw=2 sts=2 et: */ +/** + * \author Marcus Holland-Moritz (github@mhxnet.de) + * \copyright Copyright (c) Marcus Holland-Moritz + * + * This file is part of dwarfs. + * + * dwarfs 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. + * + * dwarfs 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 dwarfs. If not, see . + */ + +#include + +#include + +namespace dwarfs::writer { + +std::ostream& operator<<(std::ostream& os, const metadata_options& opts) { + os << "{"; + if (opts.uid) { + os << "uid: " << *opts.uid << ", "; + } + if (opts.gid) { + os << "gid: " << *opts.gid << ", "; + } + if (opts.timestamp) { + os << "timestamp: " << *opts.timestamp << ", "; + } + if (opts.keep_all_times) { + os << "keep_all_times, "; + } + os << "time_resolution_sec: " << opts.time_resolution_sec << ", "; + if (opts.pack_chunk_table) { + os << "pack_chunk_table, "; + } + if (opts.pack_directories) { + os << "pack_directories, "; + } + if (opts.pack_shared_files_table) { + os << "pack_shared_files_table, "; + } + if (opts.plain_names_table) { + os << "plain_names_table, "; + } + if (opts.pack_names) { + os << "pack_names, "; + } + if (opts.pack_names_index) { + os << "pack_names_index, "; + } + if (opts.plain_symlinks_table) { + os << "plain_symlinks_table, "; + } + if (opts.pack_symlinks) { + os << "pack_symlinks, "; + } + if (opts.pack_symlinks_index) { + os << "pack_symlinks_index, "; + } + if (opts.force_pack_string_tables) { + os << "force_pack_string_tables, "; + } + if (opts.no_create_timestamp) { + os << "no_create_timestamp, "; + } + os << "inode_size_cache_min_chunk_count: " + << opts.inode_size_cache_min_chunk_count; + return os; +} + +} // namespace dwarfs::writer diff --git a/test/compat_test.cpp b/test/compat_test.cpp index 5427a4d2..40d170d8 100644 --- a/test/compat_test.cpp +++ b/test/compat_test.cpp @@ -820,6 +820,27 @@ std::vector versions{ "0.5.6", "0.6.2", "0.7.5", "0.8.0", "0.9.10", }; +using rebuild_metadata_type = + std::pair>; + +[[maybe_unused]] std::ostream& +operator<<(std::ostream& os, rebuild_metadata_type const& rmt) { + os << (rmt.first ? "recompress" : "keep"); + if (rmt.second) { + os << ", " << *rmt.second; + } + return os; +} + +std::array constexpr rebuild_metadata_options{{ + {false, std::nullopt}, + {true, std::nullopt}, + {true, writer::metadata_options{}}, + {true, writer::metadata_options{.pack_chunk_table = true}}, + {true, writer::metadata_options{.pack_directories = true}}, + {true, writer::metadata_options{.pack_shared_files_table = true}}, +}}; + std::string format_sh = R"(#!/bin/bash find test/ src/ include/ -type f -name '*.[ch]*' | xargs -d $'\n' clang-format -i )"; @@ -1245,11 +1266,12 @@ INSTANTIATE_TEST_SUITE_P(dwarfs_compat, compat_filesystem, ::testing::Combine(::testing::ValuesIn(versions), ::testing::Bool())); -class rewrite - : public testing::TestWithParam> {}; +class rewrite : public testing::TestWithParam< + std::tuple> {}; TEST_P(rewrite, filesystem_rewrite) { - auto [version, recompress_block, recompress_metadata] = GetParam(); + auto [version, recompress_block, metadata_cfg] = GetParam(); + auto [recompress_metadata, rebuild_metadata] = metadata_cfg; test::test_logger lgr; test::os_access_mock os; @@ -1394,10 +1416,10 @@ TEST_P(rewrite, filesystem_rewrite) { } } -INSTANTIATE_TEST_SUITE_P(dwarfs_compat, rewrite, - ::testing::Combine(::testing::ValuesIn(versions), - ::testing::Bool(), - ::testing::Bool())); +INSTANTIATE_TEST_SUITE_P( + dwarfs_compat, rewrite, + ::testing::Combine(::testing::ValuesIn(versions), ::testing::Bool(), + ::testing::ValuesIn(rebuild_metadata_options))); class set_uidgid_test : public testing::TestWithParam {}; diff --git a/test/metadata_test.cpp b/test/metadata_test.cpp new file mode 100644 index 00000000..02d6ae1d --- /dev/null +++ b/test/metadata_test.cpp @@ -0,0 +1,170 @@ +/* vim:set ts=2 sw=2 sts=2 et: */ +/** + * \author Marcus Holland-Moritz (github@mhxnet.de) + * \copyright Copyright (c) Marcus Holland-Moritz + * + * This file is part of dwarfs. + * + * dwarfs 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. + * + * dwarfs 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 dwarfs. If not, see . + */ + +#include +#include + +#include +#include + +#include +#include +#include + +#include + +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +// #include +#include + +#include "loremipsum.h" +#include "mmap_mock.h" +#include "test_helpers.h" +#include "test_logger.h" + +using namespace dwarfs; + +namespace { + +std::string make_fragmented_file(size_t fragment_size, size_t fragment_count) { + std::mt19937_64 rng{0}; + auto const fragment = test::create_random_string(fragment_size, rng); + + std::string file; + + for (size_t i = 0; i < fragment_count; ++i) { + file.append(fragment); + file.append(test::create_random_string(4, rng)); + } + + return file; +} + +auto rebuild_metadata(logger& lgr, thrift::metadata::metadata const& md, + writer::metadata_options const& options) { + using namespace writer::internal; + return metadata_freezer(lgr).freeze( + metadata_builder(lgr, md, options).build()); +} + +template +std::string thrift_diff(T const& t1, T const& t2) { + using namespace ::facebook::thrift; + std::ostringstream oss; + debug_thrift_data_difference(t1, t2, make_diff_output_callback(oss)); + return oss.str(); +} + +} // namespace + +class metadata_test : public ::testing::Test { + protected: + void SetUp() override { + os = test::os_access_mock::create_test_instance(); + os->add("lib", {333, posix_file_type::directory | 0755, 1, 1000, 100, 0, 0, + 100, 200, 300}); + auto libc = make_fragmented_file(1024, 130); + os->add("lib/libc.so", + {334, posix_file_type::regular | 0755, 1, 1000, 100, + static_cast(libc.size()), 0, 100, 200, 300}, + libc); + + writer::writer_progress prog; + + writer::segmenter_factory::config sf_cfg; + sf_cfg.blockhash_window_size.set_default(9); + sf_cfg.window_increment_shift.set_default(1); + sf_cfg.max_active_blocks.set_default(1); + sf_cfg.bloom_filter_size.set_default(4); + sf_cfg.block_size_bits = 12; + writer::segmenter_factory sf(lgr, prog, sf_cfg); + + writer::entry_factory ef; + + thread_pool pool(lgr, *os, "worker", 4); + + writer::scanner_options options; + writer::scanner s(lgr, pool, sf, ef, *os, options); + + block_compressor bc("null"); + std::ostringstream oss; + + writer::filesystem_writer fsw(oss, lgr, pool, prog, {}); + fsw.add_default_compressor(bc); + + s.scan(fsw, std::filesystem::path("/"), prog); + + mm = std::make_shared(oss.str()); + } + + void TearDown() override {} + + test::test_logger lgr; + std::shared_ptr os; + std::shared_ptr mm; +}; + +TEST_F(metadata_test, basic) { + reader::filesystem_v2 fs(lgr, *os, mm); + + auto thawed1 = *fs.thawed_metadata(); + auto unpacked1 = *fs.unpacked_metadata(); + + std::cout << ::apache::thrift::debugString(thawed1) << std::endl; + std::cout << ::apache::thrift::debugString(unpacked1) << std::endl; + + { + auto [schema, data] = + rebuild_metadata(lgr, unpacked1, {.plain_names_table = true}); + reader::internal::metadata_v2 mv2(lgr, schema, data, {}); + + auto thawed2 = *mv2.thaw(); + auto unpacked2 = *mv2.unpack(); + + std::cout << ::apache::thrift::debugString(unpacked2) << std::endl; + + EXPECT_EQ(unpacked1, unpacked2) << thrift_diff(unpacked1, unpacked2); + EXPECT_NE(thawed1, thawed2) << thrift_diff(thawed1, thawed2); + + std::cout << thrift_diff(thawed1, thawed2); + std::cout << thrift_diff(unpacked1, unpacked2); + } +} diff --git a/tools/src/mkdwarfs_main.cpp b/tools/src/mkdwarfs_main.cpp index 2cd23844..0668db85 100644 --- a/tools/src/mkdwarfs_main.cpp +++ b/tools/src/mkdwarfs_main.cpp @@ -393,7 +393,8 @@ int mkdwarfs_main(int argc, sys_char** argv, iolayer const& iol) { size_t num_workers, num_scanner_workers, num_segmenter_workers; bool no_progress = false, remove_header = false, no_section_index = false, force_overwrite = false, no_history = false, - no_history_timestamps = false, no_history_command_line = false; + no_history_timestamps = false, no_history_command_line = false, + rebuild_metadata = false; unsigned level; int compress_niceness; uint16_t uid, gid; @@ -500,6 +501,9 @@ int mkdwarfs_main(int argc, sys_char** argv, iolayer const& iol) { ("recompress", po::value(&recompress_opts)->implicit_value("all"), "recompress an existing filesystem (none, block, metadata, all)") + ("rebuild-metadata", + po::value(&rebuild_metadata)->zero_tokens(), + "fully rebuild metadata") ("recompress-categories", po::value(&recompress_categories), "only recompress blocks of these categories") @@ -847,7 +851,7 @@ int mkdwarfs_main(int argc, sys_char** argv, iolayer const& iol) { path = iol.os->canonical(path); - bool recompress = vm.count("recompress"); + bool recompress = vm.count("recompress") || rebuild_metadata; utility::rewrite_options rw_opts; if (recompress) { std::unordered_map const modes{ @@ -856,6 +860,11 @@ int mkdwarfs_main(int argc, sys_char** argv, iolayer const& iol) { {"block", 1}, {"none", 0}, }; + + if (recompress_opts.empty() && rebuild_metadata) { + recompress_opts = "metadata"; + } + if (auto it = modes.find(recompress_opts); it != modes.end()) { rw_opts.recompress_block = it->second & 1; rw_opts.recompress_metadata = it->second & 2; @@ -1345,6 +1354,9 @@ int mkdwarfs_main(int argc, sys_char** argv, iolayer const& iol) { try { if (recompress) { + if (rebuild_metadata) { + rw_opts.rebuild_metadata = options.metadata; + } utility::rewrite_filesystem(lgr, *input_filesystem, *fsw, *cat_resolver, rw_opts); } else {