static int ne_sanity_check_user_mem_region_page()

in drivers/virt/nitro_enclaves/ne_misc_dev.c [894:920]

• 21 lines of code
• 4 McCabe index (conditional complexity)

static int ne_sanity_check_user_mem_region_page(struct ne_enclave *ne_enclave,
						struct page *mem_region_page)
{
	if (!PageHuge(mem_region_page)) {
		dev_err_ratelimited(ne_misc_dev.this_device,
				    "Not a hugetlbfs page\n");

		return -NE_ERR_MEM_NOT_HUGE_PAGE;
	}

	if (page_size(mem_region_page) & (NE_MIN_MEM_REGION_SIZE - 1)) {
		dev_err_ratelimited(ne_misc_dev.this_device,
				    "Page size not multiple of 2 MiB\n");

		return -NE_ERR_INVALID_PAGE_SIZE;
	}

	if (ne_enclave->numa_node != page_to_nid(mem_region_page)) {
		dev_err_ratelimited(ne_misc_dev.this_device,
				    "Page is not from NUMA node %d\n",
				    ne_enclave->numa_node);

		return -NE_ERR_MEM_DIFFERENT_NUMA_NODE;
	}

	return 0;
}