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. */
run_stage_1(int luo_fd)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. */
run_stage_2(int luo_fd,int state_session_fd)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
main(int argc,char * argv[])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