[cache_restore] more wip

caching/restore_emitter.cc

@@ -12,27 +12,70 @@ namespace {
 	class restorer : public emitter {
 	public:
 		restorer(metadata::ptr md)
-			: md_(md) {
+			: in_superblock_(false),
+			  md_(md) {
+		}
+
+		virtual ~restorer() {
 		}
 
 		virtual void begin_superblock(std::string const &uuid,
 					      pd::block_address block_size,
 					      pd::block_address nr_cache_blocks,
 					      std::string const &policy) {
+
+			superblock &sb = md_->sb_;
+
+			sb.flags = 0;
+			memset(sb.uuid, 0, sizeof(sb.uuid));
+			sb.magic = caching::superblock_detail::SUPERBLOCK_MAGIC;
+			sb.version = 0; // FIXME: fix
+			// strncpy(sb.policy_name, policy.c_str(), sizeof(sb.policy_name));
+			memset(sb.policy_version, 0, sizeof(sb.policy_version));
+			sb.policy_hint_size = 0; // FIXME: fix
+
+			memset(sb.metadata_space_map_root, 0, sizeof(sb.metadata_space_map_root));
+			sb.mapping_root = 0;
+			sb.hint_root = 0;
+
+			sb.discard_root = 0;
+			sb.discard_block_size = 0;
+			sb.discard_nr_blocks = 0;
+
+			sb.data_block_size = block_size;
+			sb.metadata_block_size = 0;
+			sb.cache_blocks = nr_cache_blocks;
+
+			sb.compat_flags = 0;
+			sb.compat_ro_flags = 0;
+			sb.incompat_flags = 0;
+
+			sb.read_hits = 0;
+			sb.read_misses = 0;
+			sb.write_hits = 0;
+			sb.write_misses = 0;
 		}
 
 		virtual void end_superblock() {
+			md_->commit();
 		}
 
 		virtual void begin_mappings() {
+			// noop
 		}
 
 		virtual void end_mappings() {
+			// noop
 		}
 
 		virtual void mapping(pd::block_address cblock,
 				     pd::block_address oblock,
 				     bool dirty) {
+			mapping_array_detail::mapping m;
+			m.oblock_ = oblock;
+			m.flags_ = 0;
+
+			md_->mappings_->set(cblock, m);
 		}
 
 		virtual void begin_hints() {
@@ -46,6 +89,7 @@ namespace {
 		}
 
 	private:
+		bool in_superblock_;
 		metadata::ptr md_;
 	};
 }