Ceph » bluestore

TEST(BitmapAllocator, claim_bad_alloc_unit)

{

uint64_t block_size = 0x10000;

uint64_t capacity = _4m;

BitmapAllocator ha(g_ceph_context, capacity, block_size,

"test_allocator");

// mark the first chunk free

ha.init_add_free(0, block_size);

// Then we simulate hybrid allocator behavior when someone is releasing

// extent starting at offset 0x14000. The master allocator will

// search for free extents adjusting the above offset on the left

// via claim_free_to_left() call.

//

// Non-zero return means that master can do the merge which is wrong

// in this scenario and when occurred within hybrid allocator it will improperly

// mark extent 0x10000~0x4000 as free. Which in turn might result in data corruption.

//

auto r = ha.claim_free_to_left(block_size + 0x4000);

ASSERT_EQ(r, 0);

}