Function ztest_dmu_object_alloc_free

freebsd/contrib/openzfs/cmd/ztest/ztest.c:4468–4496

* Verify that dmu_object_{alloc,free} work as expected. */

 * Verify that dmu_object_{alloc,free} work as expected.
 */
void
ztest_dmu_object_alloc_free(ztest_ds_t *zd, uint64_t id)
{
	ztest_od_t *od;
	int batchsize;
	int size;
	int b;

	size = sizeof (ztest_od_t) * OD_ARRAY_SIZE;
	od = umem_alloc(size, UMEM_NOFAIL);
	batchsize = OD_ARRAY_SIZE;

	for (b = 0; b < batchsize; b++)
		ztest_od_init(od + b, id, FTAG, b, DMU_OT_UINT64_OTHER,
		    0, 0, 0);

	/*
	 * Destroy the previous batch of objects, create a new batch,
	 * and do some I/O on the new objects.
	 */
	if (ztest_object_init(zd, od, size, B_TRUE) != 0)
		return;

	while (ztest_random(4 * batchsize) != 0)
		ztest_io(zd, od[ztest_random(batchsize)].od_object,
		    ztest_random(ZTEST_RANGE_LOCKS) << SPA_MAXBLOCKSHIFT);

	umem_free(od, size);
}

/*
 * Rewind the global allocator to verify object allocation backfilling.