void empty_block(DEV_BLOCK *block);
void free_block(DEV_BLOCK *block);
int write_block_to_device(JCR *jcr, DEVICE *dev, DEV_BLOCK *block);
-int write_block_to_dev(DEVICE *dev, DEV_BLOCK *block);
+int write_block_to_dev(JCR *jcr, DEVICE *dev, DEV_BLOCK *block);
int read_block_from_device(DEVICE *dev, DEV_BLOCK *block);
int read_block_from_dev(DEVICE *dev, DEV_BLOCK *block);