[dbg] Improve error resilience of debugging tools
Do not open the metadata. The tool interprets user specified blocks one-by-one. Thus, there's no need to preload the metadata structures. Also remove the unused --ignore-metadata-space-map option. It was designed to control the loading of space maps with the old metadata constructors.
This commit is contained in:
Ming-Hung Tsai
@@ -48,7 +48,7 @@ namespace {
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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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<< " superblock [block#]" << endl
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<< " m1_node <block# of top-level mapping tree node>" << endl
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<< " m2_node <block# of bottom-level mapping tree node>" << endl
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<< " detail_node <block# of device details tree node>" << endl
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@@ -85,15 +85,20 @@ namespace {
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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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explicit show_superblock(block_manager::ptr bm)
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: bm_(bm) {
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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 b = superblock_detail::SUPERBLOCK_LOCATION;
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if (args.size() == 2)
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b = boost::lexical_cast<block_address>(args[1]);
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superblock_detail::superblock sb = read_superblock(bm_, b);
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formatter::ptr f = create_xml_formatter();
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thin_provisioning::superblock_detail::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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@@ -134,7 +139,7 @@ namespace {
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}
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private:
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metadata::ptr md_;
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block_manager::ptr bm_;
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};
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class device_details_show_traits : public thin_provisioning::device_tree_detail::device_details_traits {
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@@ -185,8 +190,8 @@ namespace {
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template <typename ShowTraits>
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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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explicit show_btree_node(block_manager::ptr bm)
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: bm_(bm) {
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}
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virtual void exec(strings const &args, ostream &out) {
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@@ -196,7 +201,7 @@ namespace {
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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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block_manager::read_ref rr = bm_->read_lock(block);
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node_ref<uint64_show_traits::value_trait> n = btree_detail::to_node<uint64_show_traits::value_trait>(rr);
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if (n.get_type() == INTERNAL)
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@@ -229,32 +234,27 @@ namespace {
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f->output(out, 0);
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}
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metadata::ptr md_;
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block_manager::ptr bm_;
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};
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class show_index_block : public dbg::command {
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public:
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explicit show_index_block(metadata::ptr md)
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: md_(md) {
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explicit show_index_block(block_manager::ptr bm)
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: bm_(bm) {
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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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// manually load metadata_index, without using index_validator()
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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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sm_disk_detail::sm_root_disk const *d =
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reinterpret_cast<sm_disk_detail::sm_root_disk const *>(md_->sb_.metadata_space_map_root_);
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sm_disk_detail::sm_root v;
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sm_disk_detail::sm_root_traits::unpack(*d, v);
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block_address nr_indexes = base::div_up<block_address>(v.nr_blocks_, ENTRIES_PER_BLOCK);
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// no checksum validation for debugging purpose
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block_manager::read_ref rr = bm_->read_lock(block);
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sm_disk_detail::metadata_index const *mdi =
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reinterpret_cast<sm_disk_detail::metadata_index const *>(rr.data());
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show_metadata_index(mdi, nr_indexes, out);
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show_metadata_index(mdi, sm_disk_detail::MAX_METADATA_BITMAPS, out);
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}
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private:
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@@ -267,6 +267,10 @@ namespace {
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sm_disk_detail::index_entry ie;
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for (block_address i = 0; i < nr_indexes; i++) {
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sm_disk_detail::index_entry_traits::unpack(*(mdi->index + i), ie);
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if (!ie.blocknr_ && !ie.nr_free_ && !ie.none_free_before_)
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continue;
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formatter::ptr f2 = create_xml_formatter();
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index_entry_show_traits::show(f2, "value", ie);
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f->child(boost::lexical_cast<string>(i), f2);
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@@ -275,25 +279,24 @@ namespace {
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}
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unsigned const ENTRIES_PER_BLOCK = (MD_BLOCK_SIZE - sizeof(persistent_data::sm_disk_detail::bitmap_header)) * 4;
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metadata::ptr md_;
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block_manager::ptr bm_;
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};
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//--------------------------------
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int debug_(string const &path, bool ignore_metadata_sm) {
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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, 1);
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metadata::ptr md(new metadata(bm, false));
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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("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->register_command("index_block", command::ptr(new show_index_block(md)));
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interp->register_command("index_node", command::ptr(new show_btree_node<index_entry_show_traits>(md)));
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interp->register_command("superblock", command::ptr(new show_superblock(bm)));
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interp->register_command("m1_node", command::ptr(new show_btree_node<uint64_show_traits>(bm)));
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interp->register_command("m2_node", command::ptr(new show_btree_node<block_show_traits>(bm)));
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interp->register_command("detail_node", command::ptr(new show_btree_node<device_details_show_traits>(bm)));
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interp->register_command("index_block", command::ptr(new show_index_block(bm)));
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interp->register_command("index_node", command::ptr(new show_btree_node<index_entry_show_traits>(bm)));
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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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@@ -329,10 +332,8 @@ thin_debug_cmd::run(int argc, char **argv)
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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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{ "ignore-metadata-sm", no_argument, NULL, 1},
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{ NULL, no_argument, NULL, 0 }
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};
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bool ignore_metadata_sm = false;
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while ((c = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) {
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switch(c) {
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@@ -343,10 +344,6 @@ thin_debug_cmd::run(int argc, char **argv)
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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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case 1:
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ignore_metadata_sm = true;
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break;
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}
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}
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@@ -355,5 +352,5 @@ thin_debug_cmd::run(int argc, char **argv)
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exit(1);
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}
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return debug_(argv[optind], ignore_metadata_sm);
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return debug_(argv[optind]);
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}
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