[thin_dump] --skip-mappings

man8/thin_dump.8

@@ -39,10 +39,13 @@ the thin provisioning device-mapper target, else try the one at block#.
 See the thin provisioning target documentation on how to create or release
 a metadata snapshot and retrieve the block number from the kernel.
 
-.IP "\fN\-\-dev\-id\fP <dev-id>".
+.IP "\fB\-\-dev\-id\fP <dev-id>".
 Dump the specified device.  This option may be specified multiple
 times to select more than one thin device.
 
+.IP "\fB\-\-skip\-mappings".
+Do not dump the mappings.
+
 .IP "\fB\-h, \-\-help\fP".
 Print help and exit.
 

thin-provisioning/metadata_dumper.cc

@@ -195,7 +195,8 @@ namespace {
 						 d.snapshotted_time_);
 
 				try {
-					emit_mappings(tree_root);
+					if (!opts_.skip_mappings_)
+						emit_mappings(tree_root);
 				} catch (exception &e) {
 					cerr << e.what();
 					e_->end_device();

thin-provisioning/metadata_dumper.h

@@ -31,7 +31,8 @@ namespace thin_provisioning {
 	class dump_options {
 	public:
 		dump_options()
-			: repair_(false) {
+			: repair_(false),
+			  skip_mappings_(false) {
 		}
 
 		bool selected_dev(uint64_t dev_id) const {
@@ -46,6 +47,7 @@ namespace thin_provisioning {
 		}
 
 		bool repair_;
+		bool skip_mappings_;
 
 		using dev_set = std::set<uint64_t>;
 		using maybe_dev_set = boost::optional<dev_set>;

thin-provisioning/thin_dump.cc

@@ -128,6 +128,7 @@ thin_dump_cmd::run(int argc, char **argv)
 		{ "format", required_argument, NULL, 'f' },
 		{ "repair", no_argument, NULL, 'r'},
 		{ "dev-id", required_argument, NULL, 1 },
+		{ "skip-mappings", no_argument, NULL, 2 },
 		{ "version", no_argument, NULL, 'V'},
 		{ NULL, no_argument, NULL, 0 }
 	};
@@ -175,6 +176,10 @@ thin_dump_cmd::run(int argc, char **argv)
 			flags.opts.select_dev(dev_id);
 			break;
 
+		case 2:
+			flags.opts.skip_mappings_ = true;
+			break;
+
 		case 'V':
 			cout << THIN_PROVISIONING_TOOLS_VERSION << endl;
 			return 0;