383 	struct dm_block_manager *bm;  in dm_block_manager_create()  local
385 	bm = kmalloc(sizeof(*bm), GFP_KERNEL);  in dm_block_manager_create()
386 	if (!bm) {  in dm_block_manager_create()
391 	bm->bufio = dm_bufio_client_create(bdev, block_size, max_held_per_thread,  in dm_block_manager_create()
395 	if (IS_ERR(bm->bufio)) {  in dm_block_manager_create()
396 		r = PTR_ERR(bm->bufio);  in dm_block_manager_create()
397 		kfree(bm);  in dm_block_manager_create()
401 	bm->read_only = false;  in dm_block_manager_create()
403 	return bm;  in dm_block_manager_create()
410 void dm_block_manager_destroy(struct dm_block_manager *bm)  in dm_block_manager_destroy()  argument
412 	dm_bufio_client_destroy(bm->bufio);  in dm_block_manager_destroy()
413 	kfree(bm);  in dm_block_manager_destroy()
417 unsigned dm_bm_block_size(struct dm_block_manager *bm)  in dm_bm_block_size()  argument
419 	return dm_bufio_get_block_size(bm->bufio);  in dm_bm_block_size()
423 dm_block_t dm_bm_nr_blocks(struct dm_block_manager *bm)  in dm_bm_nr_blocks()  argument
425 	return dm_bufio_get_device_size(bm->bufio);  in dm_bm_nr_blocks()
428 static int dm_bm_validate_buffer(struct dm_block_manager *bm,  in dm_bm_validate_buffer()  argument
437 		r = v->check(v, (struct dm_block *) buf, dm_bufio_get_block_size(bm->bufio));  in dm_bm_validate_buffer()
455 int dm_bm_read_lock(struct dm_block_manager *bm, dm_block_t b,  in dm_bm_read_lock()  argument
463 	p = dm_bufio_read(bm->bufio, b, (struct dm_buffer **) result);  in dm_bm_read_lock()
477 	r = dm_bm_validate_buffer(bm, to_buffer(*result), aux, v);  in dm_bm_read_lock()
488 int dm_bm_write_lock(struct dm_block_manager *bm,  in dm_bm_write_lock()  argument
496 	if (dm_bm_is_read_only(bm))  in dm_bm_write_lock()
499 	p = dm_bufio_read(bm->bufio, b, (struct dm_buffer **) result);  in dm_bm_write_lock()
513 	r = dm_bm_validate_buffer(bm, to_buffer(*result), aux, v);  in dm_bm_write_lock()
524 int dm_bm_read_try_lock(struct dm_block_manager *bm,  in dm_bm_read_try_lock()  argument
532 	p = dm_bufio_get(bm->bufio, b, (struct dm_buffer **) result);  in dm_bm_read_try_lock()
547 	r = dm_bm_validate_buffer(bm, to_buffer(*result), aux, v);  in dm_bm_read_try_lock()
557 int dm_bm_write_lock_zero(struct dm_block_manager *bm,  in dm_bm_write_lock_zero()  argument
565 	if (dm_bm_is_read_only(bm))  in dm_bm_write_lock_zero()
568 	p = dm_bufio_new(bm->bufio, b, (struct dm_buffer **) result);  in dm_bm_write_lock_zero()
572 	memset(p, 0, dm_bm_block_size(bm));  in dm_bm_write_lock_zero()
603 int dm_bm_flush(struct dm_block_manager *bm)  in dm_bm_flush()  argument
605 	if (dm_bm_is_read_only(bm))  in dm_bm_flush()
608 	return dm_bufio_write_dirty_buffers(bm->bufio);  in dm_bm_flush()
612 void dm_bm_prefetch(struct dm_block_manager *bm, dm_block_t b)  in dm_bm_prefetch()  argument
614 	dm_bufio_prefetch(bm->bufio, b, 1);  in dm_bm_prefetch()
617 bool dm_bm_is_read_only(struct dm_block_manager *bm)  in dm_bm_is_read_only()  argument
619 	return (bm ? bm->read_only : true);  in dm_bm_is_read_only()
623 void dm_bm_set_read_only(struct dm_block_manager *bm)  in dm_bm_set_read_only()  argument
625 	if (bm)  in dm_bm_set_read_only()
626 		bm->read_only = true;  in dm_bm_set_read_only()
630 void dm_bm_set_read_write(struct dm_block_manager *bm)  in dm_bm_set_read_write()  argument
632 	if (bm)  in dm_bm_set_read_write()
633 		bm->read_only = false;  in dm_bm_set_read_write()