376 	struct dm_block_manager *bm;  in dm_block_manager_create()  local
378 	bm = kmalloc(sizeof(*bm), GFP_KERNEL);  in dm_block_manager_create()
379 	if (!bm) {  in dm_block_manager_create()
384 	bm->bufio = dm_bufio_client_create(bdev, block_size, max_held_per_thread,  in dm_block_manager_create()
388 	if (IS_ERR(bm->bufio)) {  in dm_block_manager_create()
389 		r = PTR_ERR(bm->bufio);  in dm_block_manager_create()
390 		kfree(bm);  in dm_block_manager_create()
394 	bm->read_only = false;  in dm_block_manager_create()
396 	return bm;  in dm_block_manager_create()
403 void dm_block_manager_destroy(struct dm_block_manager *bm)  in dm_block_manager_destroy()  argument
405 	dm_bufio_client_destroy(bm->bufio);  in dm_block_manager_destroy()
406 	kfree(bm);  in dm_block_manager_destroy()
410 unsigned dm_bm_block_size(struct dm_block_manager *bm)  in dm_bm_block_size()  argument
412 	return dm_bufio_get_block_size(bm->bufio);  in dm_bm_block_size()
416 dm_block_t dm_bm_nr_blocks(struct dm_block_manager *bm)  in dm_bm_nr_blocks()  argument
418 	return dm_bufio_get_device_size(bm->bufio);  in dm_bm_nr_blocks()
421 static int dm_bm_validate_buffer(struct dm_block_manager *bm,  in dm_bm_validate_buffer()  argument
430 		r = v->check(v, (struct dm_block *) buf, dm_bufio_get_block_size(bm->bufio));  in dm_bm_validate_buffer()
448 int dm_bm_read_lock(struct dm_block_manager *bm, dm_block_t b,  in dm_bm_read_lock()  argument
456 	p = dm_bufio_read(bm->bufio, b, (struct dm_buffer **) result);  in dm_bm_read_lock()
470 	r = dm_bm_validate_buffer(bm, to_buffer(*result), aux, v);  in dm_bm_read_lock()
481 int dm_bm_write_lock(struct dm_block_manager *bm,  in dm_bm_write_lock()  argument
489 	if (bm->read_only)  in dm_bm_write_lock()
492 	p = dm_bufio_read(bm->bufio, b, (struct dm_buffer **) result);  in dm_bm_write_lock()
506 	r = dm_bm_validate_buffer(bm, to_buffer(*result), aux, v);  in dm_bm_write_lock()
517 int dm_bm_read_try_lock(struct dm_block_manager *bm,  in dm_bm_read_try_lock()  argument
525 	p = dm_bufio_get(bm->bufio, b, (struct dm_buffer **) result);  in dm_bm_read_try_lock()
540 	r = dm_bm_validate_buffer(bm, to_buffer(*result), aux, v);  in dm_bm_read_try_lock()
550 int dm_bm_write_lock_zero(struct dm_block_manager *bm,  in dm_bm_write_lock_zero()  argument
558 	if (bm->read_only)  in dm_bm_write_lock_zero()
561 	p = dm_bufio_new(bm->bufio, b, (struct dm_buffer **) result);  in dm_bm_write_lock_zero()
565 	memset(p, 0, dm_bm_block_size(bm));  in dm_bm_write_lock_zero()
596 int dm_bm_flush(struct dm_block_manager *bm)  in dm_bm_flush()  argument
598 	if (bm->read_only)  in dm_bm_flush()
601 	return dm_bufio_write_dirty_buffers(bm->bufio);  in dm_bm_flush()
605 void dm_bm_prefetch(struct dm_block_manager *bm, dm_block_t b)  in dm_bm_prefetch()  argument
607 	dm_bufio_prefetch(bm->bufio, b, 1);  in dm_bm_prefetch()
610 bool dm_bm_is_read_only(struct dm_block_manager *bm)  in dm_bm_is_read_only()  argument
612 	return bm->read_only;  in dm_bm_is_read_only()
616 void dm_bm_set_read_only(struct dm_block_manager *bm)  in dm_bm_set_read_only()  argument
618 	bm->read_only = true;  in dm_bm_set_read_only()
622 void dm_bm_set_read_write(struct dm_block_manager *bm)  in dm_bm_set_read_write()  argument
624 	bm->read_only = false;  in dm_bm_set_read_write()