[thin tools] Change the metadata contructors to take a block_manager<>::ptr
Also check any metadata snap passed in matches what's in the superblock.
This commit is contained in:
Joe Thornber
parent
2b12854ecd
commit
30a3bf67d1
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@ -60,80 +60,6 @@ namespace {
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//----------------------------------------------------------------
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metadata::metadata(std::string const &dev_path, open_type ot,
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sector_t data_block_size, block_address nr_data_blocks)
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{
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switch (ot) {
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case OPEN:
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tm_ = open_tm(open_bm(dev_path, block_manager<>::READ_ONLY));
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sb_ = read_superblock(tm_->get_bm());
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if (sb_.version_ != 1)
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throw runtime_error("unknown metadata version");
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metadata_sm_ = open_metadata_sm(*tm_, &sb_.metadata_space_map_root_);
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tm_->set_sm(metadata_sm_);
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data_sm_ = open_disk_sm(*tm_, static_cast<void *>(&sb_.data_space_map_root_));
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details_ = device_tree::ptr(
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new device_tree(*tm_, sb_.device_details_root_,
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device_tree_detail::device_details_traits::ref_counter()));
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mappings_top_level_ = dev_tree::ptr(
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new dev_tree(*tm_, sb_.data_mapping_root_,
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mapping_tree_detail::mtree_ref_counter(tm_)));
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mappings_ = mapping_tree::ptr(
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new mapping_tree(*tm_, sb_.data_mapping_root_,
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mapping_tree_detail::block_time_ref_counter(data_sm_)));
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break;
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case CREATE:
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tm_ = open_tm(open_bm(dev_path, block_manager<>::READ_WRITE));
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space_map::ptr core = tm_->get_sm();
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metadata_sm_ = create_metadata_sm(*tm_, tm_->get_bm()->get_nr_blocks());
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copy_space_maps(metadata_sm_, core);
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tm_->set_sm(metadata_sm_);
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data_sm_ = create_disk_sm(*tm_, nr_data_blocks);
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details_ = device_tree::ptr(new device_tree(*tm_, device_tree_detail::device_details_traits::ref_counter()));
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mappings_ = mapping_tree::ptr(new mapping_tree(*tm_,
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mapping_tree_detail::block_time_ref_counter(data_sm_)));
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mappings_top_level_ = dev_tree::ptr(new dev_tree(*tm_, mappings_->get_root(),
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mapping_tree_detail::mtree_ref_counter(tm_)));
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::memset(&sb_, 0, sizeof(sb_));
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sb_.magic_ = SUPERBLOCK_MAGIC;
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sb_.version_ = 1;
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sb_.data_mapping_root_ = mappings_->get_root();
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sb_.device_details_root_ = details_->get_root();
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sb_.data_block_size_ = data_block_size;
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sb_.metadata_block_size_ = MD_BLOCK_SIZE;
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sb_.metadata_nr_blocks_ = tm_->get_bm()->get_nr_blocks();
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break;
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}
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}
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metadata::metadata(std::string const &dev_path, block_address metadata_snap)
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{
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tm_ = open_tm(open_bm(dev_path, block_manager<>::READ_ONLY, !metadata_snap));
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sb_ = read_superblock(tm_->get_bm(), metadata_snap);
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// We don't open the metadata sm for a held root
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//metadata_sm_ = open_metadata_sm(tm_, &sb_.metadata_space_map_root_);
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//tm_->set_sm(metadata_sm_);
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data_sm_ = open_disk_sm(*tm_, static_cast<void *>(&sb_.data_space_map_root_));
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details_ = device_tree::ptr(new device_tree(*tm_, sb_.device_details_root_, device_tree_detail::device_details_traits::ref_counter()));
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mappings_top_level_ = dev_tree::ptr(new dev_tree(*tm_, sb_.data_mapping_root_,
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mapping_tree_detail::mtree_ref_counter(tm_)));
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mappings_ = mapping_tree::ptr(new mapping_tree(*tm_, sb_.data_mapping_root_,
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mapping_tree_detail::block_time_ref_counter(data_sm_)));
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}
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// FIXME: duplication
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metadata::metadata(block_manager<>::ptr bm, open_type ot,
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sector_t data_block_size,
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block_address nr_data_blocks)
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@ -150,7 +76,8 @@ metadata::metadata(block_manager<>::ptr bm, open_type ot,
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tm_->set_sm(metadata_sm_);
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data_sm_ = open_disk_sm(*tm_, static_cast<void *>(&sb_.data_space_map_root_));
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details_ = device_tree::ptr(new device_tree(*tm_, sb_.device_details_root_, device_tree_detail::device_details_traits::ref_counter()));
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details_ = device_tree::ptr(new device_tree(*tm_, sb_.device_details_root_,
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device_tree_detail::device_details_traits::ref_counter()));
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mappings_top_level_ = dev_tree::ptr(new dev_tree(*tm_, sb_.data_mapping_root_,
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mapping_tree_detail::mtree_ref_counter(tm_)));
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mappings_ = mapping_tree::ptr(new mapping_tree(*tm_, sb_.data_mapping_root_,
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@ -165,7 +92,8 @@ metadata::metadata(block_manager<>::ptr bm, open_type ot,
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tm_->set_sm(metadata_sm_);
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data_sm_ = create_disk_sm(*tm_, nr_data_blocks);
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details_ = device_tree::ptr(new device_tree(*tm_, device_tree_detail::device_details_traits::ref_counter()));
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details_ = device_tree::ptr(new device_tree(*tm_,
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device_tree_detail::device_details_traits::ref_counter()));
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mappings_ = mapping_tree::ptr(new mapping_tree(*tm_,
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mapping_tree_detail::block_time_ref_counter(data_sm_)));
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mappings_top_level_ = dev_tree::ptr(new dev_tree(*tm_, mappings_->get_root(),
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@ -184,6 +112,35 @@ metadata::metadata(block_manager<>::ptr bm, open_type ot,
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}
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}
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metadata::metadata(block_manager<>::ptr bm, block_address metadata_snap)
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{
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tm_ = open_tm(bm);
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if (metadata_snap) {
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if (metadata_snap != sb_.metadata_snap_)
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throw runtime_error("metadata snapshot does not match that in superblock");
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sb_ = read_superblock(tm_->get_bm(), metadata_snap);
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// metadata snaps don't record the space maps
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} else {
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sb_ = read_superblock(tm_->get_bm(), SUPERBLOCK_LOCATION);
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metadata_sm_ = open_metadata_sm(*tm_, &sb_.metadata_space_map_root_);
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tm_->set_sm(metadata_sm_);
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data_sm_ = open_disk_sm(*tm_, static_cast<void *>(&sb_.data_space_map_root_));
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}
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details_ = device_tree::ptr(new device_tree(*tm_, sb_.device_details_root_,
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device_tree_detail::device_details_traits::ref_counter()));
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mappings_top_level_ = dev_tree::ptr(new dev_tree(*tm_, sb_.data_mapping_root_,
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mapping_tree_detail::mtree_ref_counter(tm_)));
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mappings_ = mapping_tree::ptr(new mapping_tree(*tm_, sb_.data_mapping_root_,
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mapping_tree_detail::block_time_ref_counter(data_sm_)));
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}
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void
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metadata::commit()
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{
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@ -59,21 +59,10 @@ namespace thin_provisioning {
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typedef block_manager<>::write_ref write_ref;
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typedef boost::shared_ptr<metadata> ptr;
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// Deprecated: it would be better if we passed in an already
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// constructed block_manager.
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metadata(std::string const &dev_path, open_type ot,
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sector_t data_block_size = 128, // Only used if CREATE
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block_address nr_data_blocks = 0); // Only used if CREATE
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metadata(std::string const &dev_path,
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block_address metadata_snap = 0);
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// ... use these instead ...
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metadata(block_manager<>::ptr bm, open_type ot,
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sector_t data_block_size = 128,
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block_address nr_data_blocks = 0); // Only used if CREATE
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metadata(block_manager<>::ptr bm, block_address metadata_snap);
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metadata(block_manager<>::ptr bm, block_address metadata_snap = 0);
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void commit();
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@ -42,7 +42,8 @@ namespace {
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int dump_(string const &path, ostream &out, string const &format, struct flags &flags,
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block_address metadata_snap) {
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try {
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metadata::ptr md(new metadata(path, metadata_snap));
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block_manager<>::ptr bm = open_bm(path, block_manager<>::READ_ONLY, !metadata_snap);
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metadata::ptr md(new metadata(bm, metadata_snap));
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emitter::ptr e;
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if (format == "xml")
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@ -2,6 +2,7 @@
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#include <getopt.h>
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#include <libgen.h>
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#include "persistent-data/file_utils.h"
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#include "thin-provisioning/commands.h"
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#include "human_readable_format.h"
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#include "metadata_dumper.h"
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@ -17,10 +18,12 @@ namespace {
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int repair(string const &old_path, string const &new_path) {
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try {
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// block size gets updated by the restorer
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metadata::ptr new_md(new metadata(new_path, metadata::CREATE, 128, 0));
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block_manager<>::ptr new_bm = open_bm(new_path, block_manager<>::READ_WRITE);
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metadata::ptr new_md(new metadata(new_bm, metadata::CREATE, 128, 0));
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emitter::ptr e = create_restore_emitter(new_md);
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metadata::ptr old_md(new metadata(old_path));
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block_manager<>::ptr old_bm = open_bm(old_path, block_manager<>::READ_ONLY);
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metadata::ptr old_md(new metadata(old_bm));
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metadata_dump(old_md, e, true);
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} catch (std::exception &e) {
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@ -45,7 +45,8 @@ namespace {
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int restore(string const &backup_file, string const &dev, bool quiet) {
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try {
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// The block size gets updated by the restorer.
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metadata::ptr md(new metadata(dev, metadata::CREATE, 128, 0));
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block_manager<>::ptr bm(open_bm(dev, block_manager<>::READ_WRITE));
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metadata::ptr md(new metadata(bm, metadata::CREATE, 128, 0));
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emitter::ptr restorer = create_restore_emitter(md);
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parse_xml(backup_file, restorer, quiet);
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@ -6,6 +6,7 @@
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#undef BLOCK_SIZE
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#include "persistent-data/file_utils.h"
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#include "thin-provisioning/commands.h"
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#include "metadata.h"
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#include "version.h"
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@ -118,7 +119,8 @@ namespace {
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int trim(string const &metadata_dev, string const &data_dev) {
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// We can trim any block that has zero count in the data
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// space map.
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metadata md(metadata_dev, 0);
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block_manager<>::ptr bm = open_bm(metadata_dev, block_manager<>::READ_ONLY);
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metadata md(bm);
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if (!md.data_sm_->get_nr_free())
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return 0;
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