1 // SPDX-License-Identifier: GPL-2.0-only 2 3 /* 4 * Copyright (c) 2025, Google LLC. 5 * Pasha Tatashin <pasha.tatashin@soleen.com> 6 * 7 * A simple selftest to validate the end-to-end lifecycle of a LUO session 8 * across a single kexec reboot. 9 */ 10 11 #include "luo_test_utils.h" 12 13 #define TEST_SESSION_NAME "test-session" 14 #define TEST_MEMFD_TOKEN 0x1A 15 #define TEST_MEMFD_DATA "hello kexec world" 16 17 /* Constants for the state-tracking mechanism, specific to this test file. */ 18 #define STATE_SESSION_NAME "kexec_simple_state" 19 #define STATE_MEMFD_TOKEN 999 20 21 /* Stage 1: Executed before the kexec reboot. */ 22 static void run_stage_1(int luo_fd) 23 { 24 int session_fd; 25 26 ksft_print_msg("[STAGE 1] Starting pre-kexec setup...\n"); 27 28 ksft_print_msg("[STAGE 1] Creating state file for next stage (2)...\n"); 29 create_state_file(luo_fd, STATE_SESSION_NAME, STATE_MEMFD_TOKEN, 2); 30 31 ksft_print_msg("[STAGE 1] Creating session '%s' and preserving memfd...\n", 32 TEST_SESSION_NAME); 33 session_fd = luo_create_session(luo_fd, TEST_SESSION_NAME); 34 if (session_fd < 0) 35 fail_exit("luo_create_session for '%s'", TEST_SESSION_NAME); 36 37 if (create_and_preserve_memfd(session_fd, TEST_MEMFD_TOKEN, 38 TEST_MEMFD_DATA) < 0) { 39 fail_exit("create_and_preserve_memfd for token %#x", 40 TEST_MEMFD_TOKEN); 41 } 42 43 close(luo_fd); 44 daemonize_and_wait(); 45 } 46 47 /* Stage 2: Executed after the kexec reboot. */ 48 static void run_stage_2(int luo_fd, int state_session_fd) 49 { 50 int session_fd, mfd, stage; 51 52 ksft_print_msg("[STAGE 2] Starting post-kexec verification...\n"); 53 54 restore_and_read_stage(state_session_fd, STATE_MEMFD_TOKEN, &stage); 55 if (stage != 2) 56 fail_exit("Expected stage 2, but state file contains %d", stage); 57 58 ksft_print_msg("[STAGE 2] Retrieving session '%s'...\n", TEST_SESSION_NAME); 59 session_fd = luo_retrieve_session(luo_fd, TEST_SESSION_NAME); 60 if (session_fd < 0) 61 fail_exit("luo_retrieve_session for '%s'", TEST_SESSION_NAME); 62 63 ksft_print_msg("[STAGE 2] Restoring and verifying memfd (token %#x)...\n", 64 TEST_MEMFD_TOKEN); 65 mfd = restore_and_verify_memfd(session_fd, TEST_MEMFD_TOKEN, 66 TEST_MEMFD_DATA); 67 if (mfd < 0) 68 fail_exit("restore_and_verify_memfd for token %#x", TEST_MEMFD_TOKEN); 69 close(mfd); 70 71 ksft_print_msg("[STAGE 2] Test data verified successfully.\n"); 72 ksft_print_msg("[STAGE 2] Finalizing test session...\n"); 73 if (luo_session_finish(session_fd) < 0) 74 fail_exit("luo_session_finish for test session"); 75 close(session_fd); 76 77 ksft_print_msg("[STAGE 2] Finalizing state session...\n"); 78 if (luo_session_finish(state_session_fd) < 0) 79 fail_exit("luo_session_finish for state session"); 80 close(state_session_fd); 81 82 ksft_print_msg("\n--- SIMPLE KEXEC TEST PASSED ---\n"); 83 } 84 85 int main(int argc, char *argv[]) 86 { 87 return luo_test(argc, argv, STATE_SESSION_NAME, 88 run_stage_1, run_stage_2); 89 } 90