149 lines
3.8 KiB
C++
149 lines
3.8 KiB
C++
#include "persistent-data/checksum.h"
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#include "persistent-data/data-structures/btree.h"
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#include "persistent-data/file_utils.h"
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#include "persistent-data/space-maps/disk_structures.h"
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#include "thin-provisioning/commands.h"
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#include "thin-provisioning/metadata.h"
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#include "thin-provisioning/superblock.h"
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#include "version.h"
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#include <iostream>
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#include <getopt.h>
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#include <libgen.h>
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#include <stdlib.h>
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#include <stdexcept>
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using namespace persistent_data;
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using namespace sm_disk_detail;
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using namespace std;
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using namespace thin_provisioning;
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//----------------------------------------------------------------
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namespace {
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bool is_superblock(block_manager<>::read_ref &rr) {
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using namespace superblock_detail;
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superblock_disk const *sbd = reinterpret_cast<superblock_disk const *>(rr.data());
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if (to_cpu<uint64_t>(sbd->magic_) == SUPERBLOCK_MAGIC) {
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superblock sb;
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superblock_traits::unpack(*sbd, sb);
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cout << "metadata nr blocks: " << sb.metadata_nr_blocks_ << endl;
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return true;
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}
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return false;
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}
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bool is_bitmap_block(block_manager<>::read_ref &rr) {
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bitmap_header const *data = reinterpret_cast<bitmap_header const *>(rr.data());
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crc32c sum(BITMAP_CSUM_XOR);
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sum.append(&data->not_used, MD_BLOCK_SIZE - sizeof(uint32_t));
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return sum.get_sum() == to_cpu<uint32_t>(data->csum);
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}
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bool is_index_block(block_manager<>::read_ref &rr) {
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metadata_index const *mi = reinterpret_cast<metadata_index const *>(rr.data());
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crc32c sum(INDEX_CSUM_XOR);
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sum.append(&mi->padding_, MD_BLOCK_SIZE - sizeof(uint32_t));
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return sum.get_sum() == to_cpu<uint32_t>(mi->csum_);
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}
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bool is_btree_node(block_manager<>::read_ref &rr) {
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using namespace btree_detail;
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disk_node const *data = reinterpret_cast<disk_node const *>(rr.data());
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node_header const *n = &data->header;
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crc32c sum(BTREE_CSUM_XOR);
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sum.append(&n->flags, MD_BLOCK_SIZE - sizeof(uint32_t));
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return sum.get_sum() == to_cpu<uint32_t>(n->csum);
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}
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void show_blocks(string const &dev) {
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block_manager<>::ptr bm = open_bm(dev, block_manager<>::READ_ONLY);
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metadata md(bm, metadata::OPEN);
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cout << "Metadata space map: nr_blocks = " << md.metadata_sm_->get_nr_blocks()
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<< ", nr_free_blocks = " << md.metadata_sm_->get_nr_free()
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<< endl;
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cout << "Data space map: nr_blocks = " << md.data_sm_->get_nr_blocks()
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<< ", nr_free_blocks = " << md.data_sm_->get_nr_free()
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<< endl;
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block_address nr_blocks = bm->get_nr_blocks();
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for (block_address b = 0; b < nr_blocks; b++) {
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block_manager<>::read_ref rr = bm->read_lock(b);
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if (is_superblock(rr))
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cout << b << ": superblock" << endl;
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else if (is_bitmap_block(rr))
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cout << b << ": bitmap block" << endl;
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else if (is_btree_node(rr))
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cout << b << ": btree_node" << endl;
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else
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cout << b << ": unknown" << endl;
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}
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}
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}
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//----------------------------------------------------------------
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thin_show_metadata_cmd::thin_show_metadata_cmd()
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: command("thin_show_metadata")
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{
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}
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void
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thin_show_metadata_cmd::usage(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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thin_show_metadata_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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try {
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show_blocks(argv[optind]);
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} catch (std::exception const &e) {
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cerr << e.what() << endl;
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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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