+void bluesky_block_touch(BlueSkyInode *inode, uint64_t i);
+void bluesky_block_fetch(BlueSkyFS *fs, BlueSkyBlock *block,
+ BlueSkyStoreAsync *barrier);
+void bluesky_block_flush(BlueSkyFS *fs, BlueSkyBlock *block,
+ BlueSkyStoreAsync *barrier);
+void bluesky_file_flush(BlueSkyInode *inode, BlueSkyStoreAsync *barrier);
+void bluesky_file_drop_cached(BlueSkyInode *inode);
+