Move init into a separate file

blockstore_init.h

@@ -0,0 +1,23 @@
+#pragma once
+
+class blockstore_init_meta
+{
+    blockstore *bs;
+    uint8_t *metadata_buffer;
+    uint64_t metadata_read = 0;
+    struct iovec submit_iov;
+    int prev = 0, prev_done = 0, done_len = 0, submitted = 0, done_cnt = 0;
+public:
+    blockstore_init_meta(blockstore* bs);
+    int read_loop();
+    void handle_entries(struct clean_disk_entry* entries, int count);
+};
+
+class blockstore_init_journal
+{
+    blockstore *bs;
+    uint8_t *journal_buffer;
+public:
+    blockstore_init_journal(blockstore* bs);
+    int read_loop();
+};