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[*_restore] if things go wrong wipe the superblock.

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So we don't leave the metadata device with partially restored metadata.
This commit is contained in:
Joe Thornber
2017-09-28 14:39:24 +01:00
parent 8035e10b2a
commit 5b92f410ec
5 changed files with 35 additions and 3 deletions
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6
thin-provisioning/thin_restore.cc
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@@ -16,6 +16,7 @@
// with thin-provisioning-tools. If not, see
// <http://www.gnu.org/licenses/>.
#include "base/file_utils.h"
#include "base/output_file_requirements.h"
#include "persistent-data/file_utils.h"
#include "thin-provisioning/commands.h"
@@ -44,15 +45,20 @@ using namespace thin_provisioning;
namespace {
int restore(string const &backup_file, string const &dev, bool quiet) {
bool metadata_touched = false;
try {
// The block size gets updated by the restorer.
block_manager<>::ptr bm(open_bm(dev, block_manager<>::READ_WRITE));
file_utils::check_file_exists(backup_file);
metadata_touched = true;
metadata::ptr md(new metadata(bm, metadata::CREATE, 128, 0));
emitter::ptr restorer = create_restore_emitter(md);
parse_xml(backup_file, restorer, quiet);
} catch (std::exception &e) {
if (metadata_touched)
file_utils::zero_superblock(dev);
cerr << e.what() << endl;
return 1;
}