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[thin_check] Add support for --metadata-snap.

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Not tested yet.
This commit is contained in:
Joe Thornber 2020-06-09 14:19:59 +01:00
parent 01a7462ece
commit 86704deacb
6 changed files with 46 additions and 20 deletions
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1
functional-tests/scenario-string-constants.scm
View File

@ -29,6 +29,7 @@ Options:
{-q|--quiet}
{-h|--help}
{-V|--version}
{-m|--metadata-snap}
{--override-mapping-root}
{--clear-needs-check-flag}
{--ignore-non-fatal-errors}

21
thin-provisioning/metadata_checker.cc
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@ -137,12 +137,13 @@ namespace {
//--------------------------------
error_state examine_superblock(block_manager::ptr bm,
block_address sb_location,
nested_output &out) {
out << "examining superblock" << end_message();
nested_output::nest _ = out.push();
superblock_reporter sb_rep(out);
check_superblock(bm, sb_rep);
check_superblock(bm, sb_rep, sb_location);
return sb_rep.get_error();
}
@ -307,18 +308,24 @@ namespace {
error_state check() {
error_state err = NO_ERROR;
auto sb_location = superblock_detail::SUPERBLOCK_LOCATION;
err << examine_superblock(bm_, out_);
if (options_.use_metadata_snap_) {
superblock_detail::superblock sb = read_superblock(bm_, sb_location);
sb_location = sb.metadata_snap_;
if (sb_location == superblock_detail::SUPERBLOCK_LOCATION)
throw runtime_error("No metadata snapshot found.");
}
err << examine_superblock(bm_, sb_location, out_);
if (err == FATAL) {
if (check_for_xml(bm_))
out_ << "This looks like XML. thin_check only checks the binary metadata format." << end_message();
return err;
}
superblock_detail::superblock sb = read_superblock(bm_);
transaction_manager::ptr tm =
open_tm(bm_, superblock_detail::SUPERBLOCK_LOCATION);
superblock_detail::superblock sb = read_superblock(bm_, sb_location);
transaction_manager::ptr tm = open_tm(bm_, sb_location);
sb.data_mapping_root_ = mapping_root(sb, options_);
print_info(tm, sb, info_out_);
@ -412,6 +419,10 @@ void check_options::set_override_mapping_root(block_address b) {
override_mapping_root_ = b;
}
void check_options::set_metadata_snap() {
sm_opts_ = SPACE_MAP_NONE;
}
base::error_state
thin_provisioning::check_metadata(block_manager::ptr bm,
check_options const &check_opts,

4
thin-provisioning/metadata_checker.h
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@ -43,11 +43,11 @@ namespace thin_provisioning {
void set_superblock_only();
void set_skip_mappings();
void set_override_mapping_root(bcache::block_address b);
void set_metadata_snap();
bool use_metadata_snap_;
data_mapping_options check_data_mappings_;
space_map_options sm_opts_;
boost::optional<bcache::block_address> override_mapping_root_;
};

5
thin-provisioning/superblock.cc
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@ -194,11 +194,12 @@ namespace thin_provisioning {
void
check_superblock(block_manager::ptr bm,
superblock_detail::damage_visitor &visitor) {
superblock_detail::damage_visitor &visitor,
block_address sb_location) {
using namespace superblock_detail;
try {
bm->read_lock(SUPERBLOCK_LOCATION, superblock_validator());
bm->read_lock(sb_location, superblock_validator());
} catch (std::exception const &e) {
visitor.visit(superblock_corruption(e.what()));

3
thin-provisioning/superblock.h
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@ -139,7 +139,8 @@ namespace thin_provisioning {
superblock_detail::superblock const &sb);
void check_superblock(persistent_data::block_manager::ptr bm,
superblock_detail::damage_visitor &visitor);
superblock_detail::damage_visitor &visitor,
persistent_data::block_address sb_location = superblock_detail::SUPERBLOCK_LOCATION);
}
//----------------------------------------------------------------

30
thin-provisioning/thin_check.cc
View File

@ -109,15 +109,16 @@ thin_check_cmd::thin_check_cmd()
void
thin_check_cmd::usage(std::ostream &out) const
{
out << "Usage: " << get_name() << " [options] {device|file}" << endl
<< "Options:" << endl
<< " {-q|--quiet}" << endl
<< " {-h|--help}" << endl
<< " {-V|--version}" << endl
<< " {--override-mapping-root}" << endl
<< " {--clear-needs-check-flag}" << endl
<< " {--ignore-non-fatal-errors}" << endl
<< " {--skip-mappings}" << endl
out << "Usage: " << get_name() << " [options] {device|file}\n"
<< "Options:\n"
<< " {-q|--quiet}\n"
<< " {-h|--help}\n"
<< " {-V|--version}\n"
<< " {-m|--metadata-snap}\n"
<< " {--override-mapping-root}\n"
<< " {--clear-needs-check-flag}\n"
<< " {--ignore-non-fatal-errors}\n"
<< " {--skip-mappings}\n"
<< " {--super-block-only}" << endl;
}
@ -132,6 +133,7 @@ thin_check_cmd::run(int argc, char **argv)
{ "quiet", no_argument, NULL, 'q'},
{ "help", no_argument, NULL, 'h'},
{ "version", no_argument, NULL, 'V'},
{ "metadata-snap", no_argument, NULL, 'm'},
{ "super-block-only", no_argument, NULL, 1},
{ "skip-mappings", no_argument, NULL, 2},
{ "ignore-non-fatal-errors", no_argument, NULL, 3},
@ -154,6 +156,10 @@ thin_check_cmd::run(int argc, char **argv)
cout << THIN_PROVISIONING_TOOLS_VERSION << endl;
return 0;
case 'm':
fs.check_opts.set_metadata_snap();
break;
case 1:
// super-block-only
fs.check_opts.set_superblock_only();
@ -185,6 +191,12 @@ thin_check_cmd::run(int argc, char **argv)
}
}
if (fs.clear_needs_check_flag_on_success && fs.check_opts.use_metadata_snap_) {
cerr << "--metadata-snap cannot be combined with --clear-needs-check-flag.";
usage(cerr);
exit(1);
}
if (argc == optind) {
if (!fs.quiet) {
cerr << "No input file provided." << endl;