| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <commonlib/region.h> |
| #include <string.h> |
| #include <tests/test.h> |
| |
| /* We'd like to test overflow conditions, but for tests size_t is dependent on the HOSTCC |
| architecture. We use this to normalize the available address space to [VAL(0x0):VAL(0xf)). */ |
| #define VAL(v) ((size_t)(v##ULL << (sizeof(size_t) * 8 - 4))) |
| |
| static void test_region(void **state) |
| { |
| /* Self-test: make sure VAL() overflow works as intended. */ |
| assert_true(VAL(5) + VAL(10) > VAL(10)); |
| assert_true(VAL(7) + VAL(10) < VAL(10)); |
| |
| struct region outer = { .offset = VAL(2), .size = VAL(4) }; |
| assert_int_equal(region_offset(&outer), VAL(2)); |
| assert_int_equal(region_sz(&outer), VAL(4)); |
| assert_int_equal(region_end(&outer), VAL(6)); |
| |
| struct region inner = { .offset = VAL(3), .size = VAL(2) }; |
| assert_true(region_is_subregion(&outer, &inner)); |
| |
| struct region touching_bottom = { .offset = VAL(2), .size = VAL(1) }; |
| assert_true(region_is_subregion(&outer, &touching_bottom)); |
| |
| struct region touching_top = { .offset = VAL(5), .size = VAL(1) }; |
| assert_true(region_is_subregion(&outer, &touching_top)); |
| |
| struct region overlap_bottom = { .offset = VAL(1), .size = VAL(2) }; |
| assert_false(region_is_subregion(&outer, &overlap_bottom)); |
| |
| struct region overlap_top = { .offset = VAL(5), .size = VAL(2) }; |
| assert_false(region_is_subregion(&outer, &overlap_top)); |
| |
| struct region below = { .offset = 0, .size = VAL(1) }; |
| assert_false(region_is_subregion(&outer, &below)); |
| |
| struct region above = { .offset = VAL(0xf), .size = VAL(1) }; |
| assert_false(region_is_subregion(&outer, &above)); |
| } |
| |
| static void *mock_mmap(const struct region_device *rdev, size_t offset, size_t size) |
| { |
| check_expected_ptr(rdev); |
| check_expected(offset); |
| check_expected(size); |
| |
| return mock_ptr_type(void *); |
| } |
| |
| static int mock_unmap(const struct region_device *rdev, void *mapping) |
| { |
| check_expected_ptr(rdev); |
| check_expected_ptr(mapping); |
| |
| return mock(); |
| } |
| |
| static ssize_t mock_readat(const struct region_device *rdev, void *buffer, |
| size_t offset, size_t size) |
| { |
| check_expected_ptr(rdev); |
| check_expected_ptr(buffer); |
| check_expected(offset); |
| check_expected(size); |
| |
| ssize_t ret = mock(); |
| if (!ret) |
| return size; |
| } |
| |
| static ssize_t mock_writeat(const struct region_device *rdev, const void *buffer, |
| size_t offset, size_t size) |
| { |
| check_expected_ptr(rdev); |
| check_expected_ptr(buffer); |
| check_expected(offset); |
| check_expected(size); |
| |
| ssize_t ret = mock(); |
| if (!ret) |
| return size; |
| } |
| |
| static ssize_t mock_eraseat(const struct region_device *rdev, size_t offset, size_t size) |
| { |
| check_expected_ptr(rdev); |
| check_expected(offset); |
| check_expected(size); |
| |
| ssize_t ret = mock(); |
| if (!ret) |
| return size; |
| } |
| |
| struct region_device_ops mock_rdev_ops = { |
| .mmap = mock_mmap, |
| .munmap = mock_unmap, |
| .readat = mock_readat, |
| .writeat = mock_writeat, |
| .eraseat = mock_eraseat, |
| }; |
| |
| struct region_device mock_rdev = REGION_DEV_INIT(&mock_rdev_ops, 0, ~(size_t)0); |
| void *mmap_result = (void *)0x12345678; |
| const size_t mock_size = 256; |
| u8 mock_buffer[256]; |
| |
| static void test_rdev_basics(void **state) |
| { |
| assert_int_equal(region_device_offset(&mock_rdev), 0); |
| assert_int_equal(region_device_sz(&mock_rdev), ~(size_t)0); |
| assert_int_equal(region_device_end(&mock_rdev), ~(size_t)0); |
| } |
| |
| /* |
| * This function sets up defaults for the mock_rdev_ops functions so we don't have to explicitly |
| * mock every parameter every time. cmocka doesn't really work well for this sort of use case |
| * and won't let you override these anymore once they're set (because these are stored as |
| * queues, not stacks, and once you store an "infinite" element the test can never proceed |
| * behind it), so tests will always have to enqueue any custom values they may need for the rest |
| * of the test function before calling this. |
| */ |
| static void rdev_mock_defaults(void) |
| { |
| will_return_maybe(mock_mmap, mmap_result); |
| will_return_maybe(mock_unmap, 0); |
| will_return_maybe(mock_readat, 0); |
| will_return_maybe(mock_writeat, 0); |
| will_return_maybe(mock_eraseat, 0); |
| |
| expect_value_count(mock_mmap, rdev, &mock_rdev, -2); |
| expect_value_count(mock_unmap, rdev, &mock_rdev, -2); |
| expect_value_count(mock_readat, rdev, &mock_rdev, -2); |
| expect_value_count(mock_writeat, rdev, &mock_rdev, -2); |
| expect_value_count(mock_eraseat, rdev, &mock_rdev, -2); |
| |
| expect_value_count(mock_readat, buffer, &mock_buffer, -2); |
| expect_value_count(mock_writeat, buffer, &mock_buffer, -2); |
| |
| expect_value_count(mock_mmap, offset, 0, -2); |
| expect_value_count(mock_readat, offset, 0, -2); |
| expect_value_count(mock_writeat, offset, 0, -2); |
| expect_value_count(mock_eraseat, offset, 0, -2); |
| |
| expect_value_count(mock_mmap, size, mock_size, -2); |
| expect_value_count(mock_readat, size, mock_size, -2); |
| expect_value_count(mock_writeat, size, mock_size, -2); |
| expect_value_count(mock_eraseat, size, mock_size, -2); |
| |
| expect_value_count(mock_unmap, mapping, mmap_result, -2); |
| } |
| |
| static void test_rdev_success(void **state) |
| { |
| struct region_device child; |
| |
| expect_value(mock_mmap, size, region_device_sz(&mock_rdev)); |
| |
| rdev_mock_defaults(); |
| |
| assert_ptr_equal(rdev_mmap_full(&mock_rdev), mmap_result); |
| |
| assert_ptr_equal(rdev_mmap(&mock_rdev, 0, mock_size), mmap_result); |
| assert_int_equal(rdev_munmap(&mock_rdev, mmap_result), 0); |
| assert_int_equal(rdev_readat(&mock_rdev, mock_buffer, 0, mock_size), mock_size); |
| assert_int_equal(rdev_writeat(&mock_rdev, mock_buffer, 0, mock_size), mock_size); |
| assert_int_equal(rdev_eraseat(&mock_rdev, 0, mock_size), mock_size); |
| } |
| |
| static void test_rdev_failure(void **state) |
| { |
| will_return(mock_mmap, NULL); |
| will_return(mock_unmap, -1); |
| will_return(mock_readat, -1); |
| will_return(mock_writeat, -1); |
| will_return(mock_eraseat, -1); |
| |
| rdev_mock_defaults(); |
| |
| assert_null(rdev_mmap(&mock_rdev, 0, mock_size)); |
| assert_int_equal(rdev_munmap(&mock_rdev, mmap_result), -1); |
| assert_int_equal(rdev_readat(&mock_rdev, mock_buffer, 0, mock_size), -1); |
| assert_int_equal(rdev_writeat(&mock_rdev, mock_buffer, 0, mock_size), -1); |
| assert_int_equal(rdev_eraseat(&mock_rdev, 0, mock_size), -1); |
| } |
| |
| static void test_rdev_wrap(void **state) |
| { |
| struct region_device child; |
| const size_t offs = VAL(0xf); |
| const size_t wrap_size = VAL(2); |
| /* Known API limitation -- can't exactly touch address space limit from below. */ |
| const size_t fit_size = VAL(1) - 1; |
| |
| /* For the 'wrap' cases, the underlying rdev_ops aren't even called, so only add |
| expectations for the 'fit' cases. */ |
| expect_value(mock_mmap, offset, offs); |
| expect_value(mock_readat, offset, offs); |
| expect_value(mock_writeat, offset, offs); |
| expect_value(mock_eraseat, offset, offs); |
| |
| expect_value(mock_mmap, size, fit_size); |
| expect_value(mock_readat, size, fit_size); |
| expect_value(mock_writeat, size, fit_size); |
| expect_value(mock_eraseat, size, fit_size); |
| |
| rdev_mock_defaults(); |
| |
| /* Accesses to regions that wrap around the end of the address space should fail. */ |
| assert_null(rdev_mmap(&mock_rdev, offs, wrap_size)); |
| assert_int_equal(rdev_readat(&mock_rdev, mock_buffer, offs, wrap_size), -1); |
| assert_int_equal(rdev_writeat(&mock_rdev, mock_buffer, offs, wrap_size), -1); |
| assert_int_equal(rdev_eraseat(&mock_rdev, offs, wrap_size), -1); |
| assert_int_equal(rdev_chain(&child, &mock_rdev, offs, wrap_size), -1); |
| |
| /* Just barely touching the end of the address space (and the rdev) should be fine. */ |
| assert_ptr_equal(rdev_mmap(&mock_rdev, offs, fit_size), mmap_result); |
| assert_int_equal(rdev_readat(&mock_rdev, mock_buffer, offs, fit_size), fit_size); |
| assert_int_equal(rdev_writeat(&mock_rdev, mock_buffer, offs, fit_size), fit_size); |
| assert_int_equal(rdev_eraseat(&mock_rdev, offs, fit_size), fit_size); |
| assert_int_equal(rdev_chain(&child, &mock_rdev, offs, fit_size), 0); |
| } |
| |
| static void test_rdev_chain(void **state) |
| { |
| struct region_device child; |
| const size_t child_offs = VAL(2); |
| const size_t child_size = VAL(4); |
| const size_t offs = VAL(1); |
| const size_t ovrflw_size = child_size - offs + 1; |
| |
| /* The mock_size test is the only one that will go through to underlying rdev_ops. */ |
| expect_value(mock_mmap, offset, child_offs + offs); |
| expect_value(mock_readat, offset, child_offs + offs); |
| expect_value(mock_writeat, offset, child_offs + offs); |
| expect_value(mock_eraseat, offset, child_offs + offs); |
| |
| rdev_mock_defaults(); |
| |
| /* First a quick test for rdev_chain_full(). */ |
| assert_int_equal(rdev_chain_full(&child, &mock_rdev), 0); |
| assert_int_equal(region_device_sz(&child), region_device_sz(&mock_rdev)); |
| assert_int_equal(region_device_offset(&child), region_device_offset(&mock_rdev)); |
| assert_int_equal(rdev_relative_offset(&mock_rdev, &child), 0); |
| |
| /* Remaining tests use rdev chained to [child_offs:child_size) subregion. */ |
| assert_int_equal(rdev_chain(&child, &mock_rdev, child_offs, child_size), 0); |
| assert_int_equal(region_device_sz(&child), child_size); |
| assert_int_equal(region_device_offset(&child), child_offs); |
| assert_int_equal(region_device_end(&child), child_offs + child_size); |
| assert_int_equal(rdev_relative_offset(&mock_rdev, &child), child_offs); |
| assert_int_equal(rdev_relative_offset(&child, &mock_rdev), -1); |
| |
| /* offs + mock_size < child_size, so will succeed. */ |
| assert_ptr_equal(rdev_mmap(&child, offs, mock_size), mmap_result); |
| assert_int_equal(rdev_munmap(&child, mmap_result), 0); |
| assert_int_equal(rdev_readat(&child, mock_buffer, offs, mock_size), mock_size); |
| assert_int_equal(rdev_writeat(&child, mock_buffer, offs, mock_size), mock_size); |
| assert_int_equal(rdev_eraseat(&child, offs, mock_size), mock_size); |
| |
| /* offs + ovrflw_size > child_size, so will fail. */ |
| assert_null(rdev_mmap(&child, offs, ovrflw_size)); |
| assert_int_equal(rdev_readat(&child, mock_buffer, offs, ovrflw_size), -1); |
| assert_int_equal(rdev_writeat(&child, mock_buffer, offs, ovrflw_size), -1); |
| assert_int_equal(rdev_eraseat(&child, offs, ovrflw_size), -1); |
| |
| /* Using child_size as offset, the start of the area will already be out of range. */ |
| assert_null(rdev_mmap(&child, child_size, mock_size)); |
| assert_int_equal(rdev_readat(&child, mock_buffer, child_size, mock_size), -1); |
| assert_int_equal(rdev_writeat(&child, mock_buffer, child_size, mock_size), -1); |
| assert_int_equal(rdev_eraseat(&child, child_size, mock_size), -1); |
| } |
| |
| static void test_rdev_double_chain(void **state) |
| { |
| struct region_device first, second; |
| const size_t first_offs = VAL(2); |
| const size_t first_size = VAL(6); |
| const size_t second_offs = VAL(2); |
| const size_t second_size = VAL(2); |
| const size_t offs = VAL(1); |
| const size_t ovrflw_size = second_size - offs + 1; |
| |
| /* The mock_size test is the only one that will go through to underlying rdev_ops. */ |
| expect_value(mock_mmap, offset, first_offs + second_offs + offs); |
| expect_value(mock_readat, offset, first_offs + second_offs + offs); |
| expect_value(mock_writeat, offset, first_offs + second_offs + offs); |
| expect_value(mock_eraseat, offset, first_offs + second_offs + offs); |
| |
| rdev_mock_defaults(); |
| |
| /* First, chain an rdev to root over [first_offs:first_size). */ |
| assert_int_equal(rdev_chain(&first, &mock_rdev, first_offs, first_size), 0); |
| |
| /* Trying to chain a second to first beyond its end should fail. */ |
| assert_int_equal(rdev_chain(&second, &first, second_offs, first_size), -1); |
| |
| /* Chain second to first at [second_offs:second_size). */ |
| assert_int_equal(rdev_chain(&second, &first, second_offs, second_size), 0); |
| assert_int_equal(rdev_relative_offset(&first, &second), second_offs); |
| assert_int_equal(rdev_relative_offset(&mock_rdev, &second), first_offs + second_offs); |
| |
| /* offs + mock_size < second_size, so will succeed. */ |
| assert_ptr_equal(rdev_mmap(&second, offs, mock_size), mmap_result); |
| assert_int_equal(rdev_munmap(&second, mmap_result), 0); |
| assert_int_equal(rdev_readat(&second, mock_buffer, offs, mock_size), mock_size); |
| assert_int_equal(rdev_writeat(&second, mock_buffer, offs, mock_size), mock_size); |
| assert_int_equal(rdev_eraseat(&second, offs, mock_size), mock_size); |
| |
| /* offs + ovrflw_size > second_size, so will fail. */ |
| assert_null(rdev_mmap(&second, offs, ovrflw_size)); |
| assert_int_equal(rdev_readat(&second, mock_buffer, offs, ovrflw_size), -1); |
| assert_int_equal(rdev_writeat(&second, mock_buffer, offs, ovrflw_size), -1); |
| assert_int_equal(rdev_eraseat(&second, offs, ovrflw_size), -1); |
| |
| /* offs + second_size + offs way out of range. */ |
| assert_null(rdev_mmap(&second, second_size + offs, mock_size)); |
| assert_int_equal(rdev_readat(&second, mock_buffer, second_size + offs, mock_size), -1); |
| assert_int_equal(rdev_writeat(&second, mock_buffer, second_size + offs, mock_size), -1); |
| assert_int_equal(rdev_eraseat(&second, second_size + offs, mock_size), -1); |
| } |
| |
| static void test_mem_rdev(void **state) |
| { |
| const size_t size = 256; |
| u8 backing[size]; |
| u8 scratch[size]; |
| int i; |
| struct mem_region_device mem = MEM_REGION_DEV_RW_INIT(backing, size); |
| |
| /* Test writing to and reading from full mapping. */ |
| memset(backing, 0xa5, size); |
| u8 *mapping = rdev_mmap_full(&mem.rdev); |
| assert_non_null(mapping); |
| for (i = 0; i < size; i++) |
| assert_int_equal(mapping[i], 0xa5); |
| memset(mapping, 0x5a, size); |
| for (i = 0; i < size; i++) |
| assert_int_equal(backing[i], 0x5a); |
| assert_int_equal(rdev_munmap(&mem.rdev, mapping), 0); |
| |
| /* Test read/write/erase of single bytes. */ |
| for (i = 0; i < size; i++) { |
| u8 val = i + 0xaa; |
| scratch[0] = val; |
| assert_int_equal(rdev_writeat(&mem.rdev, &scratch, i, 1), 1); |
| assert_int_equal(backing[i], val); |
| assert_int_equal(scratch[0], val); |
| val = i + 0x55; |
| backing[i] = val; |
| assert_int_equal(rdev_readat(&mem.rdev, &scratch, i, 1), 1); |
| assert_int_equal(scratch[0], val); |
| assert_int_equal(backing[i], val); |
| assert_int_equal(rdev_eraseat(&mem.rdev, i, 1), 1); |
| assert_int_equal(backing[i], 0); |
| } |
| |
| /* Test read/write/erase of larger chunk. */ |
| size_t offs = 0x47; |
| size_t chunk = 0x72; |
| memset(backing, 0, size); |
| memset(scratch, 0, size); |
| memset(scratch + offs, 0x39, chunk); |
| assert_int_equal(rdev_writeat(&mem.rdev, scratch + offs, offs, chunk), chunk); |
| assert_memory_equal(backing, scratch, size); |
| memset(backing, 0, size); |
| assert_int_equal(rdev_readat(&mem.rdev, scratch + offs, offs, chunk), chunk); |
| assert_memory_equal(backing, scratch, size); |
| memset(scratch + offs + 1, 0, chunk - 1); |
| assert_int_equal(rdev_eraseat(&mem.rdev, offs + 1, chunk - 1), chunk - 1); |
| assert_memory_equal(backing, scratch, size); |
| |
| /* Test mapping of larger chunk. */ |
| memset(backing, 0, size); |
| mapping = rdev_mmap(&mem.rdev, offs, chunk); |
| assert_non_null(mapping); |
| memset(scratch, 0x93, size); |
| memcpy(mapping, scratch, chunk); |
| memset(scratch, 0, size); |
| memset(scratch + offs, 0x93, chunk); |
| assert_memory_equal(backing, scratch, size); |
| assert_int_equal(rdev_munmap(&mem.rdev, mapping), 0); |
| assert_memory_equal(backing, scratch, size); |
| } |
| |
| int main(void) |
| { |
| const struct CMUnitTest tests[] = { |
| cmocka_unit_test(test_region), |
| cmocka_unit_test(test_rdev_basics), |
| cmocka_unit_test(test_rdev_success), |
| cmocka_unit_test(test_rdev_failure), |
| cmocka_unit_test(test_rdev_wrap), |
| cmocka_unit_test(test_rdev_chain), |
| cmocka_unit_test(test_rdev_double_chain), |
| cmocka_unit_test(test_mem_rdev), |
| }; |
| |
| return cmocka_run_group_tests(tests, NULL, NULL); |
| } |