389 	struct dm_block_manager *bm;  in dm_block_manager_create()  local
391 	bm = kmalloc(sizeof(*bm), GFP_KERNEL);  in dm_block_manager_create()
392 	if (!bm) {  in dm_block_manager_create()
397 	bm->bufio = dm_bufio_client_create(bdev, block_size, max_held_per_thread,  in dm_block_manager_create()
402 	if (IS_ERR(bm->bufio)) {  in dm_block_manager_create()
403 		r = PTR_ERR(bm->bufio);  in dm_block_manager_create()
404 		kfree(bm);  in dm_block_manager_create()
408 	bm->read_only = false;  in dm_block_manager_create()
410 	return bm;  in dm_block_manager_create()
417 void dm_block_manager_destroy(struct dm_block_manager *bm)  in dm_block_manager_destroy()  argument
419 	dm_bufio_client_destroy(bm->bufio);  in dm_block_manager_destroy()
420 	kfree(bm);  in dm_block_manager_destroy()
424 void dm_block_manager_reset(struct dm_block_manager *bm)  in dm_block_manager_reset()  argument
426 	dm_bufio_client_reset(bm->bufio);  in dm_block_manager_reset()
430 unsigned int dm_bm_block_size(struct dm_block_manager *bm)  in dm_bm_block_size()  argument
432 	return dm_bufio_get_block_size(bm->bufio);  in dm_bm_block_size()
436 dm_block_t dm_bm_nr_blocks(struct dm_block_manager *bm)  in dm_bm_nr_blocks()  argument
438 	return dm_bufio_get_device_size(bm->bufio);  in dm_bm_nr_blocks()
441 static int dm_bm_validate_buffer(struct dm_block_manager *bm,  in dm_bm_validate_buffer()  argument
451 		r = v->check(v, (struct dm_block *) buf, dm_bufio_get_block_size(bm->bufio));  in dm_bm_validate_buffer()
469 int dm_bm_read_lock(struct dm_block_manager *bm, dm_block_t b,  in dm_bm_read_lock()  argument
477 	p = dm_bufio_read(bm->bufio, b, (struct dm_buffer **) result);  in dm_bm_read_lock()
491 	r = dm_bm_validate_buffer(bm, to_buffer(*result), aux, v);  in dm_bm_read_lock()
502 int dm_bm_write_lock(struct dm_block_manager *bm,  in dm_bm_write_lock()  argument
510 	if (dm_bm_is_read_only(bm))  in dm_bm_write_lock()
513 	p = dm_bufio_read(bm->bufio, b, (struct dm_buffer **) result);  in dm_bm_write_lock()
527 	r = dm_bm_validate_buffer(bm, to_buffer(*result), aux, v);  in dm_bm_write_lock()
538 int dm_bm_read_try_lock(struct dm_block_manager *bm,  in dm_bm_read_try_lock()  argument
546 	p = dm_bufio_get(bm->bufio, b, (struct dm_buffer **) result);  in dm_bm_read_try_lock()
561 	r = dm_bm_validate_buffer(bm, to_buffer(*result), aux, v);  in dm_bm_read_try_lock()
571 int dm_bm_write_lock_zero(struct dm_block_manager *bm,  in dm_bm_write_lock_zero()  argument
579 	if (dm_bm_is_read_only(bm))  in dm_bm_write_lock_zero()
582 	p = dm_bufio_new(bm->bufio, b, (struct dm_buffer **) result);  in dm_bm_write_lock_zero()
586 	memset(p, 0, dm_bm_block_size(bm));  in dm_bm_write_lock_zero()
616 int dm_bm_flush(struct dm_block_manager *bm)  in dm_bm_flush()  argument
618 	if (dm_bm_is_read_only(bm))  in dm_bm_flush()
621 	return dm_bufio_write_dirty_buffers(bm->bufio);  in dm_bm_flush()
625 void dm_bm_prefetch(struct dm_block_manager *bm, dm_block_t b)  in dm_bm_prefetch()  argument
627 	dm_bufio_prefetch(bm->bufio, b, 1);  in dm_bm_prefetch()
630 bool dm_bm_is_read_only(struct dm_block_manager *bm)  in dm_bm_is_read_only()  argument
632 	return bm ? bm->read_only : true;  in dm_bm_is_read_only()
636 void dm_bm_set_read_only(struct dm_block_manager *bm)  in dm_bm_set_read_only()  argument
638 	if (bm)  in dm_bm_set_read_only()
639 		bm->read_only = true;  in dm_bm_set_read_only()
643 void dm_bm_set_read_write(struct dm_block_manager *bm)  in dm_bm_set_read_write()  argument
645 	if (bm)  in dm_bm_set_read_write()
646 		bm->read_only = false;  in dm_bm_set_read_write()