128 lines
2.8 KiB
C++
128 lines
2.8 KiB
C++
#include <fstream>
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#include <getopt.h>
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#include <libgen.h>
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#include <iostream>
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#include "version.h"
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#include "caching/mapping_array.h"
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#include "caching/metadata.h"
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#include "caching/xml_format.h"
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#include "persistent-data/file_utils.h"
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using namespace std;
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using namespace caching;
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using namespace caching::mapping_array_detail;
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using namespace caching::superblock_detail;
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//----------------------------------------------------------------
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namespace {
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string to_string(unsigned char const *data) {
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// FIXME: we're assuming the data is zero terminated here
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return std::string(reinterpret_cast<char const *>(data));
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}
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//--------------------------------
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string const STDOUT_PATH("-");
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bool want_stdout(string const &output) {
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return output == STDOUT_PATH;
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}
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int dump_(string const &dev, ostream &out) {
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block_manager<>::ptr bm = open_bm(dev, block_io<>::READ_ONLY);
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metadata::ptr md(new metadata(bm, metadata::OPEN));
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emitter::ptr e = create_xml_emitter(out);
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superblock const &sb = md->sb_;
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e->begin_superblock(to_string(sb.uuid), sb.data_block_size,
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sb.cache_blocks, to_string(sb.policy_name),
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sb.policy_hint_size);
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e->begin_mappings();
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for (unsigned cblock = 0; cblock < sb.cache_blocks; cblock++) {
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mapping m = md->mappings_->get(cblock);
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if (m.flags_ & M_VALID)
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e->mapping(cblock, m.oblock_, m.flags_ & M_DIRTY);
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}
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e->end_mappings();
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e->end_superblock();
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return 0;
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}
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int dump(string const &dev, string const &output) {
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try {
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if (want_stdout(output))
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return dump_(dev, cout);
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else {
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ofstream out(output.c_str());
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return dump_(dev, out);
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}
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} catch (std::exception &e) {
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cerr << e.what() << endl;
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return 1;
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}
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}
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void usage(ostream &out, string const &cmd) {
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out << "Usage: " << cmd << " [options] {device|file}" << endl
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<< "Options:" << endl
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<< " {-h|--help}" << endl
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<< " {-o <xml file>}" << endl
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<< " {-V|--version}" << endl;
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}
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}
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//----------------------------------------------------------------
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int main(int argc, char **argv)
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{
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int c;
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string output("-");
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char const shortopts[] = "ho:V";
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option const longopts[] = {
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{ "help", no_argument, NULL, 'h'},
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{ "output", required_argument, NULL, 'o'},
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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, basename(argv[0]));
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return 0;
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case 'o':
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output = optarg;
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break;
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case 'V':
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cout << THIN_PROVISIONING_TOOLS_VERSION << endl;
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return 0;
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default:
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usage(cerr, basename(argv[0]));
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return 1;
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}
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}
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if (argc == optind) {
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cerr << "No input file provided." << endl;
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usage(cerr, basename(argv[0]));
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return 1;
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}
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return dump(argv[optind], output);
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}
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//----------------------------------------------------------------
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